Initial revision
diff --git a/gtp/.deps/gtp.P b/gtp/.deps/gtp.P
new file mode 100644
index 0000000..bb8ee3c
--- /dev/null
+++ b/gtp/.deps/gtp.P
@@ -0,0 +1,111 @@
+gtp.lo gtp.o : gtp.c /usr/include/syslog.h /usr/include/sys/syslog.h \
+ /usr/include/features.h /usr/include/sys/cdefs.h \
+ /usr/include/gnu/stubs.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h \
+ /usr/include/stdio.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h \
+ /usr/include/bits/types.h /usr/include/bits/pthreadtypes.h \
+ /usr/include/bits/sched.h /usr/include/libio.h /usr/include/_G_config.h \
+ /usr/include/wchar.h /usr/include/bits/wchar.h /usr/include/gconv.h \
+ /usr/include/bits/stdio_lim.h /usr/include/bits/stdio.h \
+ /usr/include/stdlib.h /usr/include/bits/waitflags.h \
+ /usr/include/bits/waitstatus.h /usr/include/endian.h \
+ /usr/include/bits/endian.h /usr/include/xlocale.h \
+ /usr/include/sys/types.h /usr/include/time.h /usr/include/sys/select.h \
+ /usr/include/bits/select.h /usr/include/bits/sigset.h \
+ /usr/include/bits/time.h /usr/include/sys/sysmacros.h \
+ /usr/include/alloca.h /usr/include/sys/time.h /usr/include/sys/socket.h \
+ /usr/include/sys/uio.h /usr/include/bits/uio.h \
+ /usr/include/bits/socket.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h \
+ /usr/include/limits.h /usr/include/bits/posix1_lim.h \
+ /usr/include/bits/local_lim.h /usr/include/linux/limits.h \
+ /usr/include/bits/posix2_lim.h /usr/include/bits/xopen_lim.h \
+ /usr/include/bits/wordsize.h /usr/include/bits/sockaddr.h \
+ /usr/include/asm/socket.h /usr/include/asm/sockios.h \
+ /usr/include/netinet/in.h /usr/include/stdint.h /usr/include/bits/in.h \
+ /usr/include/bits/byteswap.h /usr/include/arpa/inet.h \
+ /usr/include/sys/stat.h /usr/include/bits/stat.h /usr/include/unistd.h \
+ /usr/include/bits/posix_opt.h /usr/include/bits/environments.h \
+ /usr/include/bits/confname.h /usr/include/getopt.h \
+ /usr/include/string.h /usr/include/bits/string.h \
+ /usr/include/bits/string2.h /usr/include/errno.h \
+ /usr/include/bits/errno.h /usr/include/linux/errno.h \
+ /usr/include/asm/errno.h /usr/include/fcntl.h /usr/include/bits/fcntl.h \
+ pdp.h gtp.h gtpie.h queue.h
+gtp.c :
+/usr/include/syslog.h :
+/usr/include/sys/syslog.h :
+/usr/include/features.h :
+/usr/include/sys/cdefs.h :
+/usr/include/gnu/stubs.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h :
+/usr/include/stdio.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h :
+/usr/include/bits/types.h :
+/usr/include/bits/pthreadtypes.h :
+/usr/include/bits/sched.h :
+/usr/include/libio.h :
+/usr/include/_G_config.h :
+/usr/include/wchar.h :
+/usr/include/bits/wchar.h :
+/usr/include/gconv.h :
+/usr/include/bits/stdio_lim.h :
+/usr/include/bits/stdio.h :
+/usr/include/stdlib.h :
+/usr/include/bits/waitflags.h :
+/usr/include/bits/waitstatus.h :
+/usr/include/endian.h :
+/usr/include/bits/endian.h :
+/usr/include/xlocale.h :
+/usr/include/sys/types.h :
+/usr/include/time.h :
+/usr/include/sys/select.h :
+/usr/include/bits/select.h :
+/usr/include/bits/sigset.h :
+/usr/include/bits/time.h :
+/usr/include/sys/sysmacros.h :
+/usr/include/alloca.h :
+/usr/include/sys/time.h :
+/usr/include/sys/socket.h :
+/usr/include/sys/uio.h :
+/usr/include/bits/uio.h :
+/usr/include/bits/socket.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h :
+/usr/include/limits.h :
+/usr/include/bits/posix1_lim.h :
+/usr/include/bits/local_lim.h :
+/usr/include/linux/limits.h :
+/usr/include/bits/posix2_lim.h :
+/usr/include/bits/xopen_lim.h :
+/usr/include/bits/wordsize.h :
+/usr/include/bits/sockaddr.h :
+/usr/include/asm/socket.h :
+/usr/include/asm/sockios.h :
+/usr/include/netinet/in.h :
+/usr/include/stdint.h :
+/usr/include/bits/in.h :
+/usr/include/bits/byteswap.h :
+/usr/include/arpa/inet.h :
+/usr/include/sys/stat.h :
+/usr/include/bits/stat.h :
+/usr/include/unistd.h :
+/usr/include/bits/posix_opt.h :
+/usr/include/bits/environments.h :
+/usr/include/bits/confname.h :
+/usr/include/getopt.h :
+/usr/include/string.h :
+/usr/include/bits/string.h :
+/usr/include/bits/string2.h :
+/usr/include/errno.h :
+/usr/include/bits/errno.h :
+/usr/include/linux/errno.h :
+/usr/include/asm/errno.h :
+/usr/include/fcntl.h :
+/usr/include/bits/fcntl.h :
+pdp.h :
+gtp.h :
+gtpie.h :
+queue.h :
diff --git a/gtp/.deps/gtpie.P b/gtp/.deps/gtpie.P
new file mode 100644
index 0000000..646efea
--- /dev/null
+++ b/gtp/.deps/gtpie.P
@@ -0,0 +1,52 @@
+gtpie.lo gtpie.o : gtpie.c /usr/include/stdio.h /usr/include/features.h \
+ /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h \
+ /usr/include/bits/types.h /usr/include/libio.h /usr/include/_G_config.h \
+ /usr/include/wchar.h /usr/include/bits/wchar.h /usr/include/gconv.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h \
+ /usr/include/bits/stdio_lim.h /usr/include/bits/stdio.h \
+ /usr/include/sys/types.h /usr/include/time.h /usr/include/netinet/in.h \
+ /usr/include/stdint.h /usr/include/bits/wordsize.h \
+ /usr/include/bits/socket.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h \
+ /usr/include/limits.h /usr/include/bits/sockaddr.h \
+ /usr/include/asm/socket.h /usr/include/asm/sockios.h \
+ /usr/include/bits/in.h /usr/include/endian.h /usr/include/bits/endian.h \
+ /usr/include/bits/byteswap.h /usr/include/string.h \
+ /usr/include/bits/string.h /usr/include/bits/string2.h gtpie.h
+gtpie.c :
+/usr/include/stdio.h :
+/usr/include/features.h :
+/usr/include/sys/cdefs.h :
+/usr/include/gnu/stubs.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h :
+/usr/include/bits/types.h :
+/usr/include/libio.h :
+/usr/include/_G_config.h :
+/usr/include/wchar.h :
+/usr/include/bits/wchar.h :
+/usr/include/gconv.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h :
+/usr/include/bits/stdio_lim.h :
+/usr/include/bits/stdio.h :
+/usr/include/sys/types.h :
+/usr/include/time.h :
+/usr/include/netinet/in.h :
+/usr/include/stdint.h :
+/usr/include/bits/wordsize.h :
+/usr/include/bits/socket.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h :
+/usr/include/limits.h :
+/usr/include/bits/sockaddr.h :
+/usr/include/asm/socket.h :
+/usr/include/asm/sockios.h :
+/usr/include/bits/in.h :
+/usr/include/endian.h :
+/usr/include/bits/endian.h :
+/usr/include/bits/byteswap.h :
+/usr/include/string.h :
+/usr/include/bits/string.h :
+/usr/include/bits/string2.h :
+gtpie.h :
diff --git a/gtp/.deps/lookupa.P b/gtp/.deps/lookupa.P
new file mode 100644
index 0000000..046263b
--- /dev/null
+++ b/gtp/.deps/lookupa.P
@@ -0,0 +1,3 @@
+lookupa.lo lookupa.o : lookupa.c lookupa.h
+lookupa.c :
+lookupa.h :
diff --git a/gtp/.deps/pdp.P b/gtp/.deps/pdp.P
new file mode 100644
index 0000000..1231e52
--- /dev/null
+++ b/gtp/.deps/pdp.P
@@ -0,0 +1,53 @@
+pdp.lo pdp.o : pdp.c /usr/include/stdio.h /usr/include/features.h \
+ /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h \
+ /usr/include/bits/types.h /usr/include/libio.h /usr/include/_G_config.h \
+ /usr/include/wchar.h /usr/include/bits/wchar.h /usr/include/gconv.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h \
+ /usr/include/bits/stdio_lim.h /usr/include/bits/stdio.h \
+ /usr/include/sys/types.h /usr/include/time.h /usr/include/netinet/in.h \
+ /usr/include/stdint.h /usr/include/bits/wordsize.h \
+ /usr/include/bits/socket.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h \
+ /usr/include/limits.h /usr/include/bits/sockaddr.h \
+ /usr/include/asm/socket.h /usr/include/asm/sockios.h \
+ /usr/include/bits/in.h /usr/include/endian.h /usr/include/bits/endian.h \
+ /usr/include/bits/byteswap.h /usr/include/string.h \
+ /usr/include/bits/string.h /usr/include/bits/string2.h pdp.h lookupa.h
+pdp.c :
+/usr/include/stdio.h :
+/usr/include/features.h :
+/usr/include/sys/cdefs.h :
+/usr/include/gnu/stubs.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h :
+/usr/include/bits/types.h :
+/usr/include/libio.h :
+/usr/include/_G_config.h :
+/usr/include/wchar.h :
+/usr/include/bits/wchar.h :
+/usr/include/gconv.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h :
+/usr/include/bits/stdio_lim.h :
+/usr/include/bits/stdio.h :
+/usr/include/sys/types.h :
+/usr/include/time.h :
+/usr/include/netinet/in.h :
+/usr/include/stdint.h :
+/usr/include/bits/wordsize.h :
+/usr/include/bits/socket.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h :
+/usr/include/limits.h :
+/usr/include/bits/sockaddr.h :
+/usr/include/asm/socket.h :
+/usr/include/asm/sockios.h :
+/usr/include/bits/in.h :
+/usr/include/endian.h :
+/usr/include/bits/endian.h :
+/usr/include/bits/byteswap.h :
+/usr/include/string.h :
+/usr/include/bits/string.h :
+/usr/include/bits/string2.h :
+pdp.h :
+lookupa.h :
diff --git a/gtp/.deps/queue.P b/gtp/.deps/queue.P
new file mode 100644
index 0000000..04bbd67
--- /dev/null
+++ b/gtp/.deps/queue.P
@@ -0,0 +1,64 @@
+queue.lo queue.o : queue.c /usr/include/stdlib.h /usr/include/features.h \
+ /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h \
+ /usr/include/stdio.h /usr/include/bits/types.h /usr/include/libio.h \
+ /usr/include/_G_config.h /usr/include/wchar.h /usr/include/bits/wchar.h \
+ /usr/include/gconv.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h \
+ /usr/include/bits/stdio_lim.h /usr/include/bits/stdio.h \
+ /usr/include/sys/types.h /usr/include/time.h /usr/include/sys/time.h \
+ /usr/include/bits/time.h /usr/include/sys/select.h \
+ /usr/include/bits/select.h /usr/include/bits/sigset.h \
+ /usr/include/netinet/in.h /usr/include/stdint.h \
+ /usr/include/bits/wordsize.h /usr/include/bits/socket.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h \
+ /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h \
+ /usr/include/limits.h /usr/include/bits/sockaddr.h \
+ /usr/include/asm/socket.h /usr/include/asm/sockios.h \
+ /usr/include/bits/in.h /usr/include/endian.h /usr/include/bits/endian.h \
+ /usr/include/bits/byteswap.h /usr/include/string.h \
+ /usr/include/bits/string.h /usr/include/bits/string2.h pdp.h gtp.h \
+ queue.h
+queue.c :
+/usr/include/stdlib.h :
+/usr/include/features.h :
+/usr/include/sys/cdefs.h :
+/usr/include/gnu/stubs.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stddef.h :
+/usr/include/stdio.h :
+/usr/include/bits/types.h :
+/usr/include/libio.h :
+/usr/include/_G_config.h :
+/usr/include/wchar.h :
+/usr/include/bits/wchar.h :
+/usr/include/gconv.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h :
+/usr/include/bits/stdio_lim.h :
+/usr/include/bits/stdio.h :
+/usr/include/sys/types.h :
+/usr/include/time.h :
+/usr/include/sys/time.h :
+/usr/include/bits/time.h :
+/usr/include/sys/select.h :
+/usr/include/bits/select.h :
+/usr/include/bits/sigset.h :
+/usr/include/netinet/in.h :
+/usr/include/stdint.h :
+/usr/include/bits/wordsize.h :
+/usr/include/bits/socket.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/limits.h :
+/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/syslimits.h :
+/usr/include/limits.h :
+/usr/include/bits/sockaddr.h :
+/usr/include/asm/socket.h :
+/usr/include/asm/sockios.h :
+/usr/include/bits/in.h :
+/usr/include/endian.h :
+/usr/include/bits/endian.h :
+/usr/include/bits/byteswap.h :
+/usr/include/string.h :
+/usr/include/bits/string.h :
+/usr/include/bits/string2.h :
+pdp.h :
+gtp.h :
+queue.h :
diff --git a/gtp/Makefile b/gtp/Makefile
new file mode 100644
index 0000000..535c07d
--- /dev/null
+++ b/gtp/Makefile
@@ -0,0 +1,339 @@
+# Generated automatically from Makefile.in by configure.
+# Makefile.in generated automatically by automake 1.4 from Makefile.am
+
+# Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+
+SHELL = /bin/sh
+
+srcdir = .
+top_srcdir = ..
+prefix = /usr/local
+exec_prefix = ${prefix}
+
+bindir = ${exec_prefix}/bin
+sbindir = ${exec_prefix}/sbin
+libexecdir = ${exec_prefix}/libexec
+datadir = ${prefix}/share
+sysconfdir = ${prefix}/etc
+sharedstatedir = ${prefix}/com
+localstatedir = ${prefix}/var
+libdir = ${exec_prefix}/lib
+infodir = ${prefix}/info
+mandir = ${prefix}/man
+includedir = ${prefix}/include
+oldincludedir = /usr/include
+
+DESTDIR =
+
+pkgdatadir = $(datadir)/OpenGGSN
+pkglibdir = $(libdir)/OpenGGSN
+pkgincludedir = $(includedir)/OpenGGSN
+
+top_builddir = ..
+
+ACLOCAL = aclocal
+AUTOCONF = autoconf
+AUTOMAKE = automake
+AUTOHEADER = autoheader
+
+INSTALL = /usr/bin/install -c
+INSTALL_PROGRAM = ${INSTALL} $(AM_INSTALL_PROGRAM_FLAGS)
+INSTALL_DATA = ${INSTALL} -m 644
+INSTALL_SCRIPT = ${INSTALL_PROGRAM}
+transform = s,x,x,
+
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+host_alias = i686-pc-linux
+host_triplet = i686-pc-linux-gnu
+AS = @AS@
+AWK = gawk
+CC = gcc
+DLLTOOL = @DLLTOOL@
+LIBTOOL = $(SHELL) $(top_builddir)/libtool
+LN_S = ln -s
+MAKEINFO = makeinfo
+OBJDUMP = @OBJDUMP@
+PACKAGE = OpenGGSN
+RANLIB = ranlib
+VERSION = 0.5
+
+lib_LTLIBRARIES = libgtp.la
+
+CFLAGS = -O2 -fno-builtin -Wall -ansi -DSBINDIR='"$(sbindir)"'
+
+libgtp_la_SOURCES = gtp.c gtp.h gtpie.c gtpie.h pdp.c pdp.h lookupa.c lookupa.h queue.c queue.h
+mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
+CONFIG_CLEAN_FILES =
+LTLIBRARIES = $(lib_LTLIBRARIES)
+
+
+DEFS = -DSTDC_HEADERS=1 -DHAVE_SYS_WAIT_H=1 -DHAVE_FCNTL_H=1 -DHAVE_STRINGS_H=1 -DHAVE_SYS_IOCTL_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYSLOG_H=1 -DHAVE_UNISTD_H=1 -DTIME_WITH_SYS_TIME=1 -DHAVE_SELECT=1 -DHAVE_SOCKET=1 -DHAVE_STRDUP=1 -DHAVE_STRERROR=1 -DHAVE_STRTOUL=1 -DPACKAGE=\"OpenGGSN\" -DVERSION=\"0.5\" -I. -I$(srcdir)
+CPPFLAGS =
+LDFLAGS =
+LIBS =
+libgtp_la_LDFLAGS =
+libgtp_la_LIBADD =
+libgtp_la_OBJECTS = gtp.lo gtpie.lo pdp.lo lookupa.lo queue.lo
+COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) --mode=compile $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+CCLD = $(CC)
+LINK = $(LIBTOOL) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@
+DIST_COMMON = Makefile.am Makefile.in
+
+
+DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST)
+
+TAR = gtar
+GZIP_ENV = --best
+DEP_FILES = .deps/gtp.P .deps/gtpie.P .deps/lookupa.P .deps/pdp.P \
+.deps/queue.P
+SOURCES = $(libgtp_la_SOURCES)
+OBJECTS = $(libgtp_la_OBJECTS)
+
+all: all-redirect
+.SUFFIXES:
+.SUFFIXES: .S .c .lo .o .s
+$(srcdir)/Makefile.in: Makefile.am $(top_srcdir)/configure.in $(ACLOCAL_M4)
+ cd $(top_srcdir) && $(AUTOMAKE) --gnu gtp/Makefile
+
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status $(BUILT_SOURCES)
+ cd $(top_builddir) \
+ && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
+
+
+mostlyclean-libLTLIBRARIES:
+
+clean-libLTLIBRARIES:
+ -test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+
+distclean-libLTLIBRARIES:
+
+maintainer-clean-libLTLIBRARIES:
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+ @$(NORMAL_INSTALL)
+ $(mkinstalldirs) $(DESTDIR)$(libdir)
+ @list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+ if test -f $$p; then \
+ echo "$(LIBTOOL) --mode=install $(INSTALL) $$p $(DESTDIR)$(libdir)/$$p"; \
+ $(LIBTOOL) --mode=install $(INSTALL) $$p $(DESTDIR)$(libdir)/$$p; \
+ else :; fi; \
+ done
+
+uninstall-libLTLIBRARIES:
+ @$(NORMAL_UNINSTALL)
+ list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+ $(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(libdir)/$$p; \
+ done
+
+.s.o:
+ $(COMPILE) -c $<
+
+.S.o:
+ $(COMPILE) -c $<
+
+mostlyclean-compile:
+ -rm -f *.o core *.core
+
+clean-compile:
+
+distclean-compile:
+ -rm -f *.tab.c
+
+maintainer-clean-compile:
+
+.s.lo:
+ $(LIBTOOL) --mode=compile $(COMPILE) -c $<
+
+.S.lo:
+ $(LIBTOOL) --mode=compile $(COMPILE) -c $<
+
+mostlyclean-libtool:
+ -rm -f *.lo
+
+clean-libtool:
+ -rm -rf .libs _libs
+
+distclean-libtool:
+
+maintainer-clean-libtool:
+
+libgtp.la: $(libgtp_la_OBJECTS) $(libgtp_la_DEPENDENCIES)
+ $(LINK) -rpath $(libdir) $(libgtp_la_LDFLAGS) $(libgtp_la_OBJECTS) $(libgtp_la_LIBADD) $(LIBS)
+
+tags: TAGS
+
+ID: $(HEADERS) $(SOURCES) $(LISP)
+ list='$(SOURCES) $(HEADERS)'; \
+ unique=`for i in $$list; do echo $$i; done | \
+ awk ' { files[$$0] = 1; } \
+ END { for (i in files) print i; }'`; \
+ here=`pwd` && cd $(srcdir) \
+ && mkid -f$$here/ID $$unique $(LISP)
+
+TAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) $(LISP)
+ tags=; \
+ here=`pwd`; \
+ list='$(SOURCES) $(HEADERS)'; \
+ unique=`for i in $$list; do echo $$i; done | \
+ awk ' { files[$$0] = 1; } \
+ END { for (i in files) print i; }'`; \
+ test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \
+ || (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags $$unique $(LISP) -o $$here/TAGS)
+
+mostlyclean-tags:
+
+clean-tags:
+
+distclean-tags:
+ -rm -f TAGS ID
+
+maintainer-clean-tags:
+
+distdir = $(top_builddir)/$(PACKAGE)-$(VERSION)/$(subdir)
+
+subdir = gtp
+
+distdir: $(DISTFILES)
+ here=`cd $(top_builddir) && pwd`; \
+ top_distdir=`cd $(top_distdir) && pwd`; \
+ distdir=`cd $(distdir) && pwd`; \
+ cd $(top_srcdir) \
+ && $(AUTOMAKE) --include-deps --build-dir=$$here --srcdir-name=$(top_srcdir) --output-dir=$$top_distdir --gnu gtp/Makefile
+ @for file in $(DISTFILES); do \
+ d=$(srcdir); \
+ if test -d $$d/$$file; then \
+ cp -pr $$d/$$file $(distdir)/$$file; \
+ else \
+ test -f $(distdir)/$$file \
+ || ln $$d/$$file $(distdir)/$$file 2> /dev/null \
+ || cp -p $$d/$$file $(distdir)/$$file || :; \
+ fi; \
+ done
+
+DEPS_MAGIC := $(shell mkdir .deps > /dev/null 2>&1 || :)
+
+-include $(DEP_FILES)
+
+mostlyclean-depend:
+
+clean-depend:
+
+distclean-depend:
+ -rm -rf .deps
+
+maintainer-clean-depend:
+
+%.o: %.c
+ @echo '$(COMPILE) -c $<'; \
+ $(COMPILE) -Wp,-MD,.deps/$(*F).pp -c $<
+ @-cp .deps/$(*F).pp .deps/$(*F).P; \
+ tr ' ' '\012' < .deps/$(*F).pp \
+ | sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
+ >> .deps/$(*F).P; \
+ rm .deps/$(*F).pp
+
+%.lo: %.c
+ @echo '$(LTCOMPILE) -c $<'; \
+ $(LTCOMPILE) -Wp,-MD,.deps/$(*F).pp -c $<
+ @-sed -e 's/^\([^:]*\)\.o[ ]*:/\1.lo \1.o :/' \
+ < .deps/$(*F).pp > .deps/$(*F).P; \
+ tr ' ' '\012' < .deps/$(*F).pp \
+ | sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
+ >> .deps/$(*F).P; \
+ rm -f .deps/$(*F).pp
+info-am:
+info: info-am
+dvi-am:
+dvi: dvi-am
+check-am: all-am
+check: check-am
+installcheck-am:
+installcheck: installcheck-am
+install-exec-am: install-libLTLIBRARIES
+install-exec: install-exec-am
+
+install-data-am:
+install-data: install-data-am
+
+install-am: all-am
+ @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+install: install-am
+uninstall-am: uninstall-libLTLIBRARIES
+uninstall: uninstall-am
+all-am: Makefile $(LTLIBRARIES)
+all-redirect: all-am
+install-strip:
+ $(MAKE) $(AM_MAKEFLAGS) AM_INSTALL_PROGRAM_FLAGS=-s install
+installdirs:
+ $(mkinstalldirs) $(DESTDIR)$(libdir)
+
+
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -rm -f Makefile $(CONFIG_CLEAN_FILES)
+ -rm -f config.cache config.log stamp-h stamp-h[0-9]*
+
+maintainer-clean-generic:
+mostlyclean-am: mostlyclean-libLTLIBRARIES mostlyclean-compile \
+ mostlyclean-libtool mostlyclean-tags mostlyclean-depend \
+ mostlyclean-generic
+
+mostlyclean: mostlyclean-am
+
+clean-am: clean-libLTLIBRARIES clean-compile clean-libtool clean-tags \
+ clean-depend clean-generic mostlyclean-am
+
+clean: clean-am
+
+distclean-am: distclean-libLTLIBRARIES distclean-compile \
+ distclean-libtool distclean-tags distclean-depend \
+ distclean-generic clean-am
+ -rm -f libtool
+
+distclean: distclean-am
+
+maintainer-clean-am: maintainer-clean-libLTLIBRARIES \
+ maintainer-clean-compile maintainer-clean-libtool \
+ maintainer-clean-tags maintainer-clean-depend \
+ maintainer-clean-generic distclean-am
+ @echo "This command is intended for maintainers to use;"
+ @echo "it deletes files that may require special tools to rebuild."
+
+maintainer-clean: maintainer-clean-am
+
+.PHONY: mostlyclean-libLTLIBRARIES distclean-libLTLIBRARIES \
+clean-libLTLIBRARIES maintainer-clean-libLTLIBRARIES \
+uninstall-libLTLIBRARIES install-libLTLIBRARIES mostlyclean-compile \
+distclean-compile clean-compile maintainer-clean-compile \
+mostlyclean-libtool distclean-libtool clean-libtool \
+maintainer-clean-libtool tags mostlyclean-tags distclean-tags \
+clean-tags maintainer-clean-tags distdir mostlyclean-depend \
+distclean-depend clean-depend maintainer-clean-depend info-am info \
+dvi-am dvi check check-am installcheck-am installcheck install-exec-am \
+install-exec install-data-am install-data install-am install \
+uninstall-am uninstall all-redirect all-am all installdirs \
+mostlyclean-generic distclean-generic clean-generic \
+maintainer-clean-generic clean mostlyclean distclean maintainer-clean
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/gtp/Makefile.am b/gtp/Makefile.am
new file mode 100644
index 0000000..88131cc
--- /dev/null
+++ b/gtp/Makefile.am
@@ -0,0 +1,9 @@
+lib_LTLIBRARIES = libgtp.la
+
+CFLAGS = -O2 -fno-builtin -Wall -ansi -DSBINDIR='"$(sbindir)"'
+
+libgtp_la_SOURCES = gtp.c gtp.h gtpie.c gtpie.h pdp.c pdp.h lookupa.c lookupa.h queue.c queue.h
+
+
+
+
diff --git a/gtp/Makefile.in b/gtp/Makefile.in
new file mode 100644
index 0000000..0dbace6
--- /dev/null
+++ b/gtp/Makefile.in
@@ -0,0 +1,339 @@
+# Makefile.in generated automatically by automake 1.4 from Makefile.am
+
+# Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+
+SHELL = @SHELL@
+
+srcdir = @srcdir@
+top_srcdir = @top_srcdir@
+VPATH = @srcdir@
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+
+bindir = @bindir@
+sbindir = @sbindir@
+libexecdir = @libexecdir@
+datadir = @datadir@
+sysconfdir = @sysconfdir@
+sharedstatedir = @sharedstatedir@
+localstatedir = @localstatedir@
+libdir = @libdir@
+infodir = @infodir@
+mandir = @mandir@
+includedir = @includedir@
+oldincludedir = /usr/include
+
+DESTDIR =
+
+pkgdatadir = $(datadir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+
+top_builddir = ..
+
+ACLOCAL = @ACLOCAL@
+AUTOCONF = @AUTOCONF@
+AUTOMAKE = @AUTOMAKE@
+AUTOHEADER = @AUTOHEADER@
+
+INSTALL = @INSTALL@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@ $(AM_INSTALL_PROGRAM_FLAGS)
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+transform = @program_transform_name@
+
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+host_alias = @host_alias@
+host_triplet = @host@
+AS = @AS@
+AWK = @AWK@
+CC = @CC@
+DLLTOOL = @DLLTOOL@
+LIBTOOL = @LIBTOOL@
+LN_S = @LN_S@
+MAKEINFO = @MAKEINFO@
+OBJDUMP = @OBJDUMP@
+PACKAGE = @PACKAGE@
+RANLIB = @RANLIB@
+VERSION = @VERSION@
+
+lib_LTLIBRARIES = libgtp.la
+
+CFLAGS = -O2 -fno-builtin -Wall -ansi -DSBINDIR='"$(sbindir)"'
+
+libgtp_la_SOURCES = gtp.c gtp.h gtpie.c gtpie.h pdp.c pdp.h lookupa.c lookupa.h queue.c queue.h
+mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
+CONFIG_CLEAN_FILES =
+LTLIBRARIES = $(lib_LTLIBRARIES)
+
+
+DEFS = @DEFS@ -I. -I$(srcdir)
+CPPFLAGS = @CPPFLAGS@
+LDFLAGS = @LDFLAGS@
+LIBS = @LIBS@
+libgtp_la_LDFLAGS =
+libgtp_la_LIBADD =
+libgtp_la_OBJECTS = gtp.lo gtpie.lo pdp.lo lookupa.lo queue.lo
+COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) --mode=compile $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+CCLD = $(CC)
+LINK = $(LIBTOOL) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@
+DIST_COMMON = Makefile.am Makefile.in
+
+
+DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST)
+
+TAR = gtar
+GZIP_ENV = --best
+DEP_FILES = .deps/gtp.P .deps/gtpie.P .deps/lookupa.P .deps/pdp.P \
+.deps/queue.P
+SOURCES = $(libgtp_la_SOURCES)
+OBJECTS = $(libgtp_la_OBJECTS)
+
+all: all-redirect
+.SUFFIXES:
+.SUFFIXES: .S .c .lo .o .s
+$(srcdir)/Makefile.in: Makefile.am $(top_srcdir)/configure.in $(ACLOCAL_M4)
+ cd $(top_srcdir) && $(AUTOMAKE) --gnu gtp/Makefile
+
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status $(BUILT_SOURCES)
+ cd $(top_builddir) \
+ && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
+
+
+mostlyclean-libLTLIBRARIES:
+
+clean-libLTLIBRARIES:
+ -test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+
+distclean-libLTLIBRARIES:
+
+maintainer-clean-libLTLIBRARIES:
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+ @$(NORMAL_INSTALL)
+ $(mkinstalldirs) $(DESTDIR)$(libdir)
+ @list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+ if test -f $$p; then \
+ echo "$(LIBTOOL) --mode=install $(INSTALL) $$p $(DESTDIR)$(libdir)/$$p"; \
+ $(LIBTOOL) --mode=install $(INSTALL) $$p $(DESTDIR)$(libdir)/$$p; \
+ else :; fi; \
+ done
+
+uninstall-libLTLIBRARIES:
+ @$(NORMAL_UNINSTALL)
+ list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+ $(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(libdir)/$$p; \
+ done
+
+.s.o:
+ $(COMPILE) -c $<
+
+.S.o:
+ $(COMPILE) -c $<
+
+mostlyclean-compile:
+ -rm -f *.o core *.core
+
+clean-compile:
+
+distclean-compile:
+ -rm -f *.tab.c
+
+maintainer-clean-compile:
+
+.s.lo:
+ $(LIBTOOL) --mode=compile $(COMPILE) -c $<
+
+.S.lo:
+ $(LIBTOOL) --mode=compile $(COMPILE) -c $<
+
+mostlyclean-libtool:
+ -rm -f *.lo
+
+clean-libtool:
+ -rm -rf .libs _libs
+
+distclean-libtool:
+
+maintainer-clean-libtool:
+
+libgtp.la: $(libgtp_la_OBJECTS) $(libgtp_la_DEPENDENCIES)
+ $(LINK) -rpath $(libdir) $(libgtp_la_LDFLAGS) $(libgtp_la_OBJECTS) $(libgtp_la_LIBADD) $(LIBS)
+
+tags: TAGS
+
+ID: $(HEADERS) $(SOURCES) $(LISP)
+ list='$(SOURCES) $(HEADERS)'; \
+ unique=`for i in $$list; do echo $$i; done | \
+ awk ' { files[$$0] = 1; } \
+ END { for (i in files) print i; }'`; \
+ here=`pwd` && cd $(srcdir) \
+ && mkid -f$$here/ID $$unique $(LISP)
+
+TAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) $(LISP)
+ tags=; \
+ here=`pwd`; \
+ list='$(SOURCES) $(HEADERS)'; \
+ unique=`for i in $$list; do echo $$i; done | \
+ awk ' { files[$$0] = 1; } \
+ END { for (i in files) print i; }'`; \
+ test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \
+ || (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags $$unique $(LISP) -o $$here/TAGS)
+
+mostlyclean-tags:
+
+clean-tags:
+
+distclean-tags:
+ -rm -f TAGS ID
+
+maintainer-clean-tags:
+
+distdir = $(top_builddir)/$(PACKAGE)-$(VERSION)/$(subdir)
+
+subdir = gtp
+
+distdir: $(DISTFILES)
+ here=`cd $(top_builddir) && pwd`; \
+ top_distdir=`cd $(top_distdir) && pwd`; \
+ distdir=`cd $(distdir) && pwd`; \
+ cd $(top_srcdir) \
+ && $(AUTOMAKE) --include-deps --build-dir=$$here --srcdir-name=$(top_srcdir) --output-dir=$$top_distdir --gnu gtp/Makefile
+ @for file in $(DISTFILES); do \
+ d=$(srcdir); \
+ if test -d $$d/$$file; then \
+ cp -pr $$d/$$file $(distdir)/$$file; \
+ else \
+ test -f $(distdir)/$$file \
+ || ln $$d/$$file $(distdir)/$$file 2> /dev/null \
+ || cp -p $$d/$$file $(distdir)/$$file || :; \
+ fi; \
+ done
+
+DEPS_MAGIC := $(shell mkdir .deps > /dev/null 2>&1 || :)
+
+-include $(DEP_FILES)
+
+mostlyclean-depend:
+
+clean-depend:
+
+distclean-depend:
+ -rm -rf .deps
+
+maintainer-clean-depend:
+
+%.o: %.c
+ @echo '$(COMPILE) -c $<'; \
+ $(COMPILE) -Wp,-MD,.deps/$(*F).pp -c $<
+ @-cp .deps/$(*F).pp .deps/$(*F).P; \
+ tr ' ' '\012' < .deps/$(*F).pp \
+ | sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
+ >> .deps/$(*F).P; \
+ rm .deps/$(*F).pp
+
+%.lo: %.c
+ @echo '$(LTCOMPILE) -c $<'; \
+ $(LTCOMPILE) -Wp,-MD,.deps/$(*F).pp -c $<
+ @-sed -e 's/^\([^:]*\)\.o[ ]*:/\1.lo \1.o :/' \
+ < .deps/$(*F).pp > .deps/$(*F).P; \
+ tr ' ' '\012' < .deps/$(*F).pp \
+ | sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
+ >> .deps/$(*F).P; \
+ rm -f .deps/$(*F).pp
+info-am:
+info: info-am
+dvi-am:
+dvi: dvi-am
+check-am: all-am
+check: check-am
+installcheck-am:
+installcheck: installcheck-am
+install-exec-am: install-libLTLIBRARIES
+install-exec: install-exec-am
+
+install-data-am:
+install-data: install-data-am
+
+install-am: all-am
+ @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+install: install-am
+uninstall-am: uninstall-libLTLIBRARIES
+uninstall: uninstall-am
+all-am: Makefile $(LTLIBRARIES)
+all-redirect: all-am
+install-strip:
+ $(MAKE) $(AM_MAKEFLAGS) AM_INSTALL_PROGRAM_FLAGS=-s install
+installdirs:
+ $(mkinstalldirs) $(DESTDIR)$(libdir)
+
+
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -rm -f Makefile $(CONFIG_CLEAN_FILES)
+ -rm -f config.cache config.log stamp-h stamp-h[0-9]*
+
+maintainer-clean-generic:
+mostlyclean-am: mostlyclean-libLTLIBRARIES mostlyclean-compile \
+ mostlyclean-libtool mostlyclean-tags mostlyclean-depend \
+ mostlyclean-generic
+
+mostlyclean: mostlyclean-am
+
+clean-am: clean-libLTLIBRARIES clean-compile clean-libtool clean-tags \
+ clean-depend clean-generic mostlyclean-am
+
+clean: clean-am
+
+distclean-am: distclean-libLTLIBRARIES distclean-compile \
+ distclean-libtool distclean-tags distclean-depend \
+ distclean-generic clean-am
+ -rm -f libtool
+
+distclean: distclean-am
+
+maintainer-clean-am: maintainer-clean-libLTLIBRARIES \
+ maintainer-clean-compile maintainer-clean-libtool \
+ maintainer-clean-tags maintainer-clean-depend \
+ maintainer-clean-generic distclean-am
+ @echo "This command is intended for maintainers to use;"
+ @echo "it deletes files that may require special tools to rebuild."
+
+maintainer-clean: maintainer-clean-am
+
+.PHONY: mostlyclean-libLTLIBRARIES distclean-libLTLIBRARIES \
+clean-libLTLIBRARIES maintainer-clean-libLTLIBRARIES \
+uninstall-libLTLIBRARIES install-libLTLIBRARIES mostlyclean-compile \
+distclean-compile clean-compile maintainer-clean-compile \
+mostlyclean-libtool distclean-libtool clean-libtool \
+maintainer-clean-libtool tags mostlyclean-tags distclean-tags \
+clean-tags maintainer-clean-tags distdir mostlyclean-depend \
+distclean-depend clean-depend maintainer-clean-depend info-am info \
+dvi-am dvi check check-am installcheck-am installcheck install-exec-am \
+install-exec install-data-am install-data install-am install \
+uninstall-am uninstall all-redirect all-am all installdirs \
+mostlyclean-generic distclean-generic clean-generic \
+maintainer-clean-generic clean mostlyclean distclean maintainer-clean
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/gtp/gtp.c b/gtp/gtp.c
new file mode 100644
index 0000000..e00168c
--- /dev/null
+++ b/gtp/gtp.c
@@ -0,0 +1,1917 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+/*
+ * gtp.c: Contains all GTP functionality. Should be able to handle multiple
+ * tunnels in the same program.
+ *
+ * TODO:
+ * - Do we need to handle fragmentation?
+ */
+
+
+#ifdef __linux__
+#define _GNU_SOURCE 1
+#endif
+
+
+#include <syslog.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <arpa/inet.h>
+
+#include <stdint.h> /* ISO C99 types */
+
+#include "pdp.h"
+#include "gtp.h"
+#include "gtpie.h"
+#include "queue.h"
+
+
+struct gtp0_header gtp0_default;
+struct gtp1_header_long gtp1_default;
+
+/* API Functions */
+
+const char* gtp_version()
+{
+ return VERSION;
+}
+
+/* gtp_new */
+/* gtp_free */
+
+int gtp_newpdp(struct gsn_t* gsn, struct pdp_t **pdp,
+ uint64_t imsi, uint8_t nsapi) {
+ return pdp_newpdp(pdp, imsi, nsapi, NULL);
+}
+
+int gtp_freepdp(struct gsn_t* gsn, struct pdp_t *pdp) {
+ return pdp_freepdp(pdp);
+}
+
+int gtp_create_context(struct gsn_t *gsn, struct pdp_t *pdp, void *aid,
+ struct in_addr* inetaddr) {
+ int version = 0;
+
+ return gtp_create_pdp_req(gsn, version, aid, inetaddr, pdp);
+}
+
+int gtp_update_context(struct gsn_t *gsn, struct pdp_t *pdp, void *aid,
+ struct in_addr* inetaddr) {
+ int version = 0;
+
+ return gtp_update_pdp_req(gsn, version, aid, inetaddr, pdp);
+}
+
+int gtp_delete_context(struct gsn_t *gsn, struct pdp_t *pdp, void *aid) {
+ int version = 0;
+ return gtp_delete_pdp_req(gsn, version, aid, pdp);
+}
+
+/* gtp_gpdu */
+
+extern int gtp_fd(struct gsn_t *gsn) {
+ return gsn->fd;
+}
+
+/* gtp_decaps */
+/* gtp_retrans */
+/* gtp_retranstimeout */
+
+int gtp_set_cb_delete_context(struct gsn_t *gsn,
+ int (*cb_delete_context) (struct pdp_t* pdp))
+{
+ gsn->cb_delete_context = cb_delete_context;
+ return 0;
+}
+
+int gtp_set_cb_create_context(struct gsn_t *gsn,
+ int (*cb_create_context) (struct pdp_t* pdp))
+{
+ gsn->cb_create_context = cb_create_context;
+ return 0;
+}
+
+/*
+
+ int gtp_set_cb_create_pdp_conf(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*, int))
+ {
+ gsn->cb_create_pdp_conf = cb;
+ return 0;
+ }
+
+ int gtp_set_cb_update_pdp_conf(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*, int, int))
+ {
+ gsn->cb_update_pdp_conf = cb;
+ return 0;
+}
+
+in t gtp_set_cb_delete_pdp_conf(struct gsn_t *gsn,
+int (*cb) (struct pdp_t*, int))
+ {
+gsn->cb_delete_pdp_conf = cb;
+return 0;
+}
+
+*/
+
+int gtp_set_cb_conf(struct gsn_t *gsn,
+ int (*cb) (int type, int cause,
+ struct pdp_t* pdp, void *aid)) {
+ gsn->cb_conf = cb;
+ return 0;
+}
+
+extern int gtp_set_cb_gpdu(struct gsn_t *gsn,
+ int (*cb_gpdu) (struct pdp_t* pdp,
+ void* pack,
+ unsigned len))
+{
+ gsn->cb_gpdu = cb_gpdu;
+ return 0;
+}
+
+
+
+void get_default_gtp(int version, void *packet) {
+ switch (version) {
+ case 0:
+ memcpy(packet, >p0_default, sizeof(gtp0_default));
+ break;
+ case 1:
+ memcpy(packet, >p1_default, sizeof(gtp1_default));
+ break;
+ }
+}
+
+int print_packet(void *packet, unsigned len)
+{
+ int i;
+ printf("The packet looks like this (%d bytes):\n", len);
+ for( i=0; i<len; i++) {
+ printf("%02x ", (unsigned char)*(char *)(packet+i));
+ if (!((i+1)%16)) printf("\n");
+ };
+ printf("\n");
+ return 0;
+}
+
+char* snprint_packet(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len, char *buf, int size) {
+ int n;
+ int pos;
+ snprintf(buf, size, "Packet from %s:%u, length: %d, content:",
+ inet_ntoa(peer->sin_addr),
+ ntohs(peer->sin_port),
+ len);
+ pos = strlen(buf);
+ for(n=0; n<len; n++) {
+ if ((pos+4)<size) {
+ sprintf((buf+pos), " %02hhx", ((unsigned char*)pack)[n]);
+ pos += 3;
+ }
+ }
+ buf[pos] = 0;
+ return buf;
+}
+
+void gtp_err(int priority, char *filename, int linenum, char *fmt, ...) {
+ va_list args;
+ char buf[ERRMSG_SIZE];
+
+ va_start(args, fmt);
+ vsnprintf(buf, ERRMSG_SIZE, fmt, args);
+ va_end(args);
+
+ syslog(priority, "%s: %d: %s", filename, linenum, buf);
+}
+
+void gtp_errpack(int pri, char *fn, int ln, struct sockaddr_in *peer,
+ void *pack, unsigned len, char *fmt, ...) {
+
+ va_list args;
+ char buf[ERRMSG_SIZE];
+ char buf2[ERRMSG_SIZE];
+ int n;
+ int pos;
+
+ va_start(args, fmt);
+ vsnprintf(buf, ERRMSG_SIZE, fmt, args);
+ va_end(args);
+
+ snprintf(buf2, ERRMSG_SIZE, "Packet from %s:%u, length: %d, content:",
+ inet_ntoa(peer->sin_addr),
+ ntohs(peer->sin_port),
+ len);
+ pos = strlen(buf2);
+ for(n=0; n<len; n++) {
+ if ((pos+4)<ERRMSG_SIZE) {
+ sprintf((buf2+pos), " %02hhx", ((unsigned char*)pack)[n]);
+ pos += 3;
+ }
+ }
+ buf2[pos] = 0;
+
+ syslog(pri, "%s: %d: %s. %s", fn, ln, buf, buf2);
+
+}
+
+
+/* ***********************************************************
+ * Reliable delivery of signalling messages
+ *
+ * Sequence numbers are used for both signalling messages and
+ * data messages.
+ *
+ * For data messages each tunnel maintains a sequence counter,
+ * which is incremented by one each time a new data message
+ * is sent. The sequence number starts at (0) zero at tunnel
+ * establishment, and wraps around at 65535 (29.060 9.3.1.1
+ * and 09.60 8.1.1.1). The sequence numbers are either ignored,
+ * or can be used to check the validity of the message in the
+ * receiver, or for reordering af packets.
+ *
+ * For signalling messages the sequence number is used by
+ * signalling messages for which a response is defined. A response
+ * message should copy the sequence from the corresponding request
+ * message. The sequence number "unambiguously" identifies a request
+ * message within a given path, with a path being defined as a set of
+ * two endpoints (29.060 8.2, 29.060 7.6, 09.60 7.8). "All request
+ * messages shall be responded to, and all response messages associated
+ * with a certain request shall always include the same information"
+ *
+ * We take this to mean that the GSN transmitting a request is free to
+ * choose the sequence number, as long as it is unique within a given path.
+ * It means that we are allowed to count backwards, or roll over at 17
+ * if we prefer that. It also means that we can use the same counter for
+ * all paths. This has the advantage that the transmitted request sequence
+ * numbers are unique within each GSN, and also we dont have to mess around
+ * with path setup and teardown.
+ *
+ * If a response message is lost, the request will be retransmitted, and
+ * the receiving GSN will receive a "duplicated" request. The standard
+ * requires the receiving GSN to send a response, with the same information
+ * as in the original response. For most messages this happens automatically:
+ *
+ * Echo: Automatically dublicates the original response
+ * Create pdp context: The SGSN may send create context request even if
+ * a context allready exist (imsi+nsapi?). This means that the reply will
+ automatically dublicate the original response. It might however have
+ * sideeffects in the application which is asked twice to allocate
+ * validate the login.
+ * Update pdp context: Automatically dublicates the original response???
+ * Delete pdp context. Automatically in gtp0, but in gtp1 will generate
+ * a nonexist reply message.
+ *
+ * The correct solution will be to make a queue containing response messages.
+ * This queue should be checked whenever a request is received. If the
+ * response is allready in the queue that response should be transmitted.
+ * It should be possible to find messages in this queue on the basis of
+ * the sequence number and peer GSN IP address (The sequense number is unique
+ * within each path). This need to be implemented by a hash table. Furthermore
+ * it should be possibly to delete messages based on a timeout. This can be
+ * achieved by means of a linked list. The timeout value need to be larger
+ * than T3-RESPONSE * N3-REQUESTS (recommended value 5). These timers are
+ * set in the peer GSN, so there is no way to know these parameters. On the
+ * other hand the timeout value need to be so small that we do not receive
+ * wraparound sequence numbere before the message is deleted. 60 seconds is
+ * probably not a bad choise.
+ *
+ * This queue however is first really needed from gtp1.
+ *
+ * gtp_req:
+ * Send off a signalling message with appropiate sequence
+ * number. Store packet in queue.
+ * gtp_conf:
+ * Remove an incoming confirmation from the queue
+ * gtp_resp:
+ * Send off a responce to a request. Use the same sequence
+ * number in the response as in the request.
+ * gtp_retrans:
+ * Retransmit any outstanding packets which have exceeded
+ * a predefined timeout.
+ *************************************************************/
+
+int gtp_req(struct gsn_t *gsn, int version, union gtp_packet *packet,
+ int len, struct in_addr *inetaddr, void *aid) {
+ struct sockaddr_in addr;
+ struct qmsg_t *qmsg;
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_addr = *inetaddr;
+ addr.sin_port = htons(GTP0_PORT);
+
+ packet->gtp0.h.seq = hton16(gsn->seq_next);
+
+ if (sendto(gsn->fd, packet, len, 0,
+ (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ gsn->err_sendto++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Sendto(fd=%d, msg=%lx, len=%d) failed: Error = %s", gsn->fd, (unsigned long) &packet, len, strerror(errno));
+ return -1;
+ }
+
+ /* Use new queue structure */
+ if (queue_newmsg(gsn->queue_req, &qmsg, &addr, gsn->seq_next)) {
+ gsn->err_queuefull++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Retransmit queue is full");
+ }
+ else {
+ memcpy(&qmsg->p, packet, sizeof(union gtp_packet));
+ qmsg->l = len;
+ qmsg->timeout = time(NULL) + 3; /* When to timeout */
+ qmsg->retrans = 0; /* No retransmissions so far */
+ qmsg->aid = aid;
+ qmsg->type = ntoh8(packet->gtp0.h.type);
+ }
+ gsn->seq_next++; /* Count up this time */
+ return 0;
+}
+
+/* gtp_conf
+ * Remove signalling packet from retransmission queue.
+ * return 0 on success, EOF if packet was not found */
+
+int gtp_conf(struct gsn_t *gsn, int version, struct sockaddr_in *peer,
+ union gtp_packet *packet, int len, uint8_t *type, void **aid) {
+ int seq = ntoh16(packet->gtp0.h.seq);
+
+ if (queue_freemsg_seq(gsn->queue_req, peer, seq, type, aid)) {
+ gsn->err_seq++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, packet, len,
+ "Confirmation packet not found in queue");
+ return EOF;
+ }
+
+ return 0;
+}
+
+int gtp_retrans(struct gsn_t *gsn) {
+ /* Retransmit any outstanding packets */
+ /* Remove from queue if maxretrans exceeded */
+ time_t now;
+ struct qmsg_t *qmsg;
+ now = time(NULL);
+ /*printf("Retrans: New beginning %d\n", (int) now);*/
+
+ while ((!queue_getfirst(gsn->queue_req, &qmsg)) &&
+ (qmsg->timeout <= now)) {
+ /*printf("Retrans timeout found: %d\n", (int) time(NULL));*/
+ if (qmsg->retrans > 3) { /* To many retrans */
+ if (gsn->cb_conf) gsn->cb_conf(qmsg->type, EOF, NULL, qmsg->aid);
+ queue_freemsg(gsn->queue_req, qmsg);
+ }
+ else {
+ if (sendto(gsn->fd, &qmsg->p, qmsg->l, 0,
+ (struct sockaddr *) &qmsg->peer, sizeof(struct sockaddr_in)) < 0) {
+ gsn->err_sendto++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Sendto(fd=%d, msg=%lx, len=%d) failed: Error = %s", gsn->fd, (unsigned long) &qmsg->p, qmsg->l, strerror(errno));
+ }
+ queue_back(gsn->queue_req, qmsg);
+ qmsg->timeout = now + 3;
+ qmsg->retrans++;
+ }
+ }
+
+ /* Also clean up reply timeouts */
+ while ((!queue_getfirst(gsn->queue_resp, &qmsg)) &&
+ (qmsg->timeout < now)) {
+ /*printf("Retrans (reply) timeout found: %d\n", (int) time(NULL));*/
+ queue_freemsg(gsn->queue_resp, qmsg);
+ }
+
+ return 0;
+}
+
+int gtp_retranstimeout(struct gsn_t *gsn, struct timeval *timeout) {
+ time_t now, later;
+ struct qmsg_t *qmsg;
+
+ if (queue_getfirst(gsn->queue_req, &qmsg)) {
+ timeout->tv_sec = 10;
+ timeout->tv_usec = 0;
+ }
+ else {
+ now = time(NULL);
+ later = qmsg->timeout;
+ timeout->tv_sec = later - now;
+ timeout->tv_usec = 0;
+ if (timeout->tv_sec < 0) timeout->tv_sec = 0; /* No negative allowed */
+ if (timeout->tv_sec > 10) timeout->tv_sec = 10; /* Max sleep for 10 sec*/
+ }
+ return 0;
+}
+
+int gtp_resp(int version, struct gsn_t *gsn, union gtp_packet *packet,
+ int len, struct sockaddr_in *peer) {
+ struct qmsg_t *qmsg;
+ uint16_t seq;
+
+ seq = ntoh16(packet->gtp0.h.seq);
+
+ /* print message */
+ /*
+ printf("gtp_resp: to %s:UDP%u\n",
+ inet_ntoa(peer->sin_addr),
+ ntohs(peer->sin_port));
+ print_packet(packet, len);
+ */
+
+ if (sendto(gsn->fd, packet, len, 0,
+ (struct sockaddr *) peer, sizeof(struct sockaddr_in)) < 0) {
+ gsn->err_sendto++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Sendto(fd=%d, msg=%lx, len=%d) failed: Error = %s", gsn->fd, (unsigned long) &packet, len, strerror(errno));
+ return -1;
+ }
+
+ /* Use new queue structure */
+ if (queue_newmsg(gsn->queue_resp, &qmsg, peer, seq)) {
+ gsn->err_queuefull++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Retransmit queue is full");
+ }
+ else {
+ memcpy(&qmsg->p, packet, sizeof(union gtp_packet));
+ qmsg->l = len;
+ qmsg->timeout = time(NULL) + 60; /* When to timeout */
+ qmsg->retrans = 0; /* No retransmissions so far */
+ qmsg->aid = NULL;
+ qmsg->type = 0;
+ }
+ return 0;
+}
+
+int gtp_dublicate(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer, uint16_t seq) {
+ struct qmsg_t *qmsg;
+
+ if(queue_seqget(gsn->queue_resp, &qmsg, peer, seq)) {
+ return EOF; /* Notfound */
+ }
+ else {
+ /* print message */
+
+ /*printf("gtp_dublicate: to %s:UDP%u\n",
+ inet_ntoa(peer->sin_addr),
+ ntohs(peer->sin_port));
+ print_packet(&qmsg->p, qmsg->l);
+ */
+ if (sendto(gsn->fd, &qmsg->p, qmsg->l, 0,
+ (struct sockaddr *) peer, sizeof(struct sockaddr_in)) < 0) {
+ gsn->err_sendto++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Sendto(fd=%d, msg=%lx, len=%d) failed: Error = %s", gsn->fd, (unsigned long) &qmsg->p, qmsg->l, strerror(errno));
+ }
+ return 0;
+ }
+}
+
+
+
+/* Perform restoration and recovery error handling as described in 29.060 */
+static void log_restart(struct gsn_t *gsn) {
+ FILE *f;
+ int i;
+ int counter = 0;
+ char filename[NAMESIZE];
+
+ filename[NAMESIZE-1] = 0; /* No null term. guarantee by strncpy */
+ strncpy(filename, gsn->statedir, NAMESIZE-1);
+ strncat(filename, RESTART_FILE,
+ NAMESIZE-1-sizeof(RESTART_FILE));
+
+ i = umask(022);
+
+ /* We try to open file. On failure we will later try to create file */
+ if (!(f = fopen(filename, "r"))) {
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "fopen(path=%s, mode=%s) failed: Error = %s", filename, "r", strerror(errno));
+ }
+ else {
+ umask(i);
+ fscanf(f, "%d", &counter);
+ if (fclose(f)) {
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "fclose failed: Error = %s", strerror(errno));
+ }
+ }
+
+ gsn->restart_counter = (unsigned char) counter;
+ gsn->restart_counter++;
+
+ if (!(f = fopen(filename, "w"))) {
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "fopen(path=%s, mode=%s) failed: Error = %s", filename, "w", strerror(errno));
+ return;
+ }
+
+ umask(i);
+ fprintf(f, "%d\n", gsn->restart_counter);
+ if (fclose(f)) {
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "fclose failed: Error = %s", strerror(errno));
+ return;
+ }
+}
+
+
+
+int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen)
+{
+ struct sockaddr_in addr;
+ int gtp_fd;
+
+ syslog(LOG_ERR, "GTP: gtp_newgsn() started");
+
+ *gsn = calloc(sizeof(struct gsn_t), 1); /* TODO */
+
+ (*gsn)->statedir = statedir;
+ log_restart(*gsn);
+
+ /* Initialise request retransmit queue */
+ queue_new(&(*gsn)->queue_req);
+ queue_new(&(*gsn)->queue_resp);
+
+ /* Initialise pdp table */
+ pdp_init();
+
+ /* Initialise call back functions */
+ (*gsn)->cb_create_context = 0;
+ (*gsn)->cb_delete_context = 0;
+ (*gsn)->cb_conf = 0;
+ (*gsn)->cb_gpdu = 0;
+
+ if ((gtp_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
+ (*gsn)->err_socket++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "socket(domain=%d, type=%d, protocol=%d) failed: Error = %s", AF_INET, SOCK_DGRAM, 0, strerror(errno));
+ return -1;
+ }
+ (*gsn)->fd = gtp_fd;
+
+ /* syslog(LOG_ERR, "GTP: gtp_init() after socket");*/
+
+ (*gsn)->gsnc = *listen;
+ (*gsn)->gsnu = *listen;
+
+ memset(&addr, 0, sizeof(addr));
+
+ addr.sin_family = AF_INET;
+ /* addr.sin_addr = *inetaddr; */
+ addr.sin_addr = *listen; /* Same IP for user traffic and signalling*/
+ addr.sin_port = htons(GTP0_PORT);
+
+ if (bind(gtp_fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ (*gsn)->err_socket++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "bind(fd=%d, addr=%lx, len=%d) failed: Error = %s", gtp_fd, (unsigned long) &addr, sizeof(addr), strerror(errno));
+ return -1;
+ }
+
+ /* Initialise "standard" GTP0 header */
+ memset(>p0_default, 0, sizeof(gtp0_default));
+ gtp0_default.flags=0x1e;
+ gtp0_default.spare1=0xff;
+ gtp0_default.spare2=0xff;
+ gtp0_default.spare3=0xff;
+ gtp0_default.number=0xff;
+
+ /* Initialise "standard" GTP1 header */
+ memset(>p1_default, 0, sizeof(gtp1_default));
+ gtp0_default.flags=0x1e;
+
+ return 0;
+}
+
+int gtp_free(struct gsn_t *gsn) {
+
+ /* Clean up retransmit queues */
+ queue_free(gsn->queue_req);
+ queue_free(gsn->queue_resp);
+
+ free(gsn);
+ return 0;
+}
+
+/* ***********************************************************
+ * Path management messages
+ * Messages: echo and version not supported.
+ * A path is connection between two UDP/IP endpoints
+ *
+ * A path is either using GTP0 or GTP1. A path can be
+ * established by any kind of GTP message??
+
+ * Which source port to use?
+ * GTP-C request destination port is 2123/3386
+ * GTP-U request destination port is 2152/3386
+ * T-PDU destination port is 2152/3386.
+ * For the above messages the source port is locally allocated.
+ * For response messages src=rx-dst and dst=rx-src.
+ * For simplicity we should probably use 2123+2152/3386 as
+ * src port even for the cases where src can be locally
+ * allocated. This also means that we have to listen only to
+ * the same ports.
+ * For response messages we need to be able to respond to
+ * the relevant src port even if it is locally allocated by
+ * the peer.
+ *
+ * The need for path management!
+ * We might need to keep a list of active paths. This might
+ * be in the form of remote IP address + UDP port numbers.
+ * (We will consider a path astablished if we have a context
+ * with the node in question)
+ *************************************************************/
+
+/* Send off an echo request */
+int gtp_echo_req(struct gsn_t *gsn, struct in_addr *inetaddr)
+{
+ union gtp_packet packet;
+
+ get_default_gtp(0, &packet);
+ packet.gtp0.h.type = hton8(GTP_ECHO_REQ);
+ packet.gtp0.h.length = hton16(0);
+
+ return gtp_req(gsn, 0, &packet, GTP0_HEADER_SIZE, inetaddr, NULL);
+}
+
+/* Send of an echo reply */
+int gtp_echo_resp(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len)
+{
+ union gtp_packet packet;
+ int length = 0;
+
+ get_default_gtp(0, &packet);
+
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_RECOVERY,
+ gsn->restart_counter);
+
+ packet.gtp0.h.type = hton8(GTP_ECHO_RSP);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.seq = ((union gtp_packet*)pack)->gtp0.h.seq;
+
+ return gtp_resp(0, gsn, &packet, GTP0_HEADER_SIZE+length, peer);
+}
+
+
+/* Handle a received echo request */
+int gtp_echo_ind(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len) {
+
+ uint16_t seq = ntoh16(((union gtp_packet*)pack)->gtp0.h.seq);
+
+ if(!gtp_dublicate(gsn, 0, peer, seq)) {
+ return 0; /* We allready send of response once */
+ }
+
+
+ /* Now send off a reply to the peer */
+ return gtp_echo_resp(gsn, peer, pack, len);
+}
+
+/* Handle a received echo reply */
+int gtp_echo_conf(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len) {
+ union gtpie_member *ie[GTPIE_SIZE];
+ unsigned char recovery;
+ void *aid = NULL;
+ uint8_t type = 0;
+
+ /* Remove packet from queue */
+ if (gtp_conf(gsn, 0, peer, pack, len, &type, &aid)) return EOF;
+
+ if (gtpie_decaps(ie, pack+sizeof(struct gtp0_header), len-sizeof(struct gtp0_header))) {
+ gsn->invalid++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Invalid message format");
+ return EOF;
+ }
+
+ if (gtpie_gettv1(ie, GTPIE_RECOVERY, 0, &recovery)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory field");
+ return EOF;
+ }
+
+ if (gsn->cb_conf) gsn->cb_conf(type, 0, NULL, aid); /* TODO: Should return recovery in callback */
+
+ return 0;
+}
+
+/* Send off a Version Not Supported message */
+/* This message is somewhat special in that it actually is a
+ * response to some other message with unsupported GTP version
+ * For this reason it has parameters like a response, and does
+ * its own message transmission. No signalling queue is used
+ * The reply is sent to the peer IP and peer UDP. This means that
+ * the peer will be receiving a GTP0 message on a GTP1 port!
+ * In practice however this will never happen as a GTP0 GSN will
+ * only listen to the GTP0 port, and therefore will never receive
+ * anything else than GTP0 */
+
+int gtp_unsup_resp(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len)
+{
+ union gtp_packet packet;
+ int length = 0;
+
+ get_default_gtp(0, &packet);
+ packet.gtp0.h.type = hton8(GTP_NOT_SUPPORTED);
+ packet.gtp0.h.length = hton16(0);
+
+ return gtp_resp(0, gsn, &packet, GTP0_HEADER_SIZE+length, peer);
+}
+
+/* Handle a Version Not Supported message */
+int gtp_unsup_conf(struct gsn_t *gsn, struct sockaddr_in *peer, void *pack, unsigned len) {
+
+ /* TODO: Need to check the validity of header and information elements */
+ /* TODO: Implement callback to application */
+ /* As long as we only support GTP0 we should never receive this message */
+ /* Should be implemented as part of GTP1 support */
+
+ /* print received message */
+ /*
+ printf("gtp_unsup_ind: from %s:UDP%u\n",
+ inet_ntoa(peer->sin_addr),
+ ntohs(peer->sin_port));
+ print_packet(pack, len);
+ */
+ return 0;
+}
+
+/* ***********************************************************
+ * Session management messages
+ * Messages: create, update and delete PDP context
+ *
+ * Information storage
+ * Information storage for each PDP context is defined in
+ * 23.060 section 13.3. Includes IMSI, MSISDN, APN, PDP-type,
+ * PDP-address (IP address), sequence numbers, charging ID.
+ * For the SGSN it also includes radio related mobility
+ * information.
+ *************************************************************/
+
+/* Send Create PDP Context Request */
+extern int gtp_create_pdp_req(struct gsn_t *gsn, int version, void *aid,
+ struct in_addr* inetaddr, struct pdp_t *pdp) {
+ union gtp_packet packet;
+ int length = 0;
+
+ get_default_gtp(0, &packet);
+
+ if (0==0) { /* Always GTP0 */
+
+ gtpie_tv0(packet.gtp0.p, &length, GTP_MAX, GTPIE_QOS_PROFILE0,
+ sizeof(pdp->qos_req0), pdp->qos_req0);
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_RECOVERY,
+ gsn->restart_counter);
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_SELECTION_MODE,
+ pdp->selmode);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_DI,
+ pdp->fllu);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_C,
+ pdp->fllc);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_EUA,
+ pdp->eua.l, pdp->eua.v);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_APN,
+ pdp->apn_use.l, pdp->apn_use.v);
+
+ if (pdp->pco_req.l) { /* Optional PCO */
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_PCO,
+ pdp->pco_req.l, pdp->pco_req.v);
+ }
+
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlc.l, pdp->gsnlc.v);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlu.l, pdp->gsnlu.v);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_MSISDN,
+ pdp->msisdn.l, pdp->msisdn.v);
+
+
+
+ } else { /* GTP1 */
+ gtpie_tv0(packet.gtp1s.p, &length, GTP_MAX, GTPIE_IMSI,
+ sizeof(pdp->imsi), (uint8_t*) &pdp->imsi);
+ gtpie_tv1(packet.gtp1s.p, &length, GTP_MAX, GTPIE_RECOVERY,
+ gsn->restart_counter);
+ gtpie_tv1(packet.gtp1s.p, &length, GTP_MAX, GTPIE_SELECTION_MODE,
+ pdp->selmode);
+ gtpie_tv4(packet.gtp1s.p, &length, GTP_MAX, GTPIE_TEI_DI,
+ pdp->teid_own);
+ gtpie_tv4(packet.gtp1s.p, &length, GTP_MAX, GTPIE_TEI_C,
+ pdp->teic_own);
+ gtpie_tv1(packet.gtp1s.p, &length, GTP_MAX, GTPIE_NSAPI,
+ pdp->nsapi);
+ /*gtpie_tv1(packet.gtp1s.p, &length, GTP_MAX, GTPIE_NSAPI,
+ pdp->nsapil); For use by several QoS profiles for the same address */
+ gtpie_tv2(packet.gtp1s.p, &length, GTP_MAX, GTPIE_CHARGING_C,
+ pdp->cch_pdp);
+ gtpie_tv2(packet.gtp1s.p, &length, GTP_MAX, GTPIE_TRACE_REF,
+ pdp->traceref);
+ gtpie_tv2(packet.gtp1s.p, &length, GTP_MAX, GTPIE_TRACE_TYPE,
+ pdp->tracetype);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_EUA,
+ pdp->eua.l, pdp->eua.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_APN,
+ pdp->apn_use.l, pdp->apn_use.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_PCO,
+ pdp->pco_req.l, pdp->pco_req.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlc.l, pdp->gsnlc.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlu.l, pdp->gsnlu.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_MSISDN,
+ pdp->msisdn.l, pdp->msisdn.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_QOS_PROFILE,
+ pdp->qos_req.l, pdp->qos_req.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_TFT,
+ pdp->tft.l, pdp->tft.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_TRIGGER_ID,
+ pdp->triggerid.l, pdp->triggerid.v);
+ gtpie_tlv(packet.gtp1s.p, &length, GTP_MAX, GTPIE_OMC_ID,
+ pdp->omcid.l, pdp->omcid.v);
+ }
+ packet.gtp0.h.type = hton8(GTP_CREATE_PDP_REQ);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.flow = 0;
+ packet.gtp0.h.tid = pdp->tid;
+
+ gtp_req(gsn, 0, &packet, GTP0_HEADER_SIZE+length, inetaddr, aid);
+
+ return 0;
+}
+
+/* Send Create PDP Context Response */
+int gtp_create_pdp_resp(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len,
+ struct pdp_t *pdp, uint8_t cause)
+{
+ union gtp_packet packet;
+ int length = 0;
+
+ get_default_gtp(0, &packet);
+
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_CAUSE, cause);
+
+ if (cause == GTPCAUSE_ACC_REQ) {
+ gtpie_tv0(packet.gtp0.p, &length, GTP_MAX, GTPIE_QOS_PROFILE0,
+ sizeof(pdp->qos_neg0), pdp->qos_neg0);
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_REORDER,
+ pdp->reorder);
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_RECOVERY,
+ gsn->restart_counter);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_DI,
+ pdp->fllu);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_C,
+ pdp->fllc);
+ gtpie_tv4(packet.gtp0.p, &length, GTP_MAX, GTPIE_CHARGING_ID,
+ 0x12345678);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_EUA,
+ pdp->eua.l, pdp->eua.v);
+
+ if (pdp->pco_neg.l) { /* Optional PCO */
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_PCO,
+ pdp->pco_neg.l, pdp->pco_neg.v);
+ }
+
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlc.l, pdp->gsnlc.v);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlu.l, pdp->gsnlu.v);
+ }
+
+ packet.gtp0.h.type = hton8(GTP_CREATE_PDP_RSP);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.flow = hton16(pdp->flrc);
+ packet.gtp0.h.seq = ((union gtp_packet*)pack)->gtp0.h.seq;
+ packet.gtp0.h.tid = ((union gtp_packet*)pack)->gtp0.h.tid;
+
+ return gtp_resp(0, gsn, &packet, GTP0_HEADER_SIZE+length, peer);
+}
+
+/* Handle Create PDP Context Request */
+int gtp_create_pdp_ind(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer, void *pack, unsigned len) {
+ struct pdp_t *pdp, *pdp_old;
+ struct pdp_t pdp_buf;
+ union gtpie_member* ie[GTPIE_SIZE];
+ uint8_t recovery;
+ uint64_t imsi;
+ uint8_t nsapi;
+ int auth = 0; /* Allow access if no callback is defined */
+
+ uint16_t seq = ntoh16(((union gtp_packet*)pack)->gtp0.h.seq);
+
+ if(!gtp_dublicate(gsn, 0, peer, seq)) {
+ return 0; /* We allready send of response once */
+ }
+
+ /* Decode information elements */
+ if (gtpie_decaps(ie, pack+GTP0_HEADER_SIZE, len-GTP0_HEADER_SIZE)) {
+ gsn->invalid++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Invalid message format");
+ if (0 == version)
+ return EOF;
+ else
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_INVALID_MESSAGE);
+ }
+
+ pdp = &pdp_buf;
+ memset(pdp, 0, sizeof(struct pdp_t));
+
+ /* Extract IMSI and NSAPI from header */
+ imsi = ((union gtp_packet*)pack)->gtp0.h.tid & 0x0fffffffffffffff;
+ nsapi = (((union gtp_packet*)pack)->gtp0.h.tid & 0xf000000000000000) >> 60;
+
+ /* pdp_newpdp(&pdp, imsi, nsapi); TODO: Need to remove again */
+
+ if (gtpie_gettv0(ie, GTPIE_QOS_PROFILE0, 0,
+ pdp->qos_req0, sizeof(pdp->qos_req0))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ /* Extract recovery (optional) */
+ if (!gtpie_gettv1(ie, GTPIE_RECOVERY, 0, &recovery)) {
+ /* TODO: Handle received recovery IE */
+ }
+
+ if (gtpie_gettv0(ie, GTPIE_SELECTION_MODE, 0,
+ &pdp->selmode, sizeof(pdp->selmode))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettv2(ie, GTPIE_FL_DI, 0, &pdp->flru)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettv2(ie, GTPIE_FL_C, 0, &pdp->flrc)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_EUA, 0, &pdp->eua.l,
+ &pdp->eua.v, sizeof(pdp->eua.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_APN, 0, &pdp->apn_req.l,
+ &pdp->apn_req.v, sizeof(pdp->apn_req.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ /* Extract protocol configuration options (optional) */
+ if (!gtpie_gettlv(ie, GTPIE_PCO, 0, &pdp->pco_req.l,
+ &pdp->pco_req.v, sizeof(pdp->pco_req.v))) {
+ /* TODO: Handle PCO IE */
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 0, &pdp->gsnrc.l,
+ &pdp->gsnrc.v, sizeof(pdp->gsnrc.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 1, &pdp->gsnru.l,
+ &pdp->gsnru.v, sizeof(pdp->gsnru.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_MSISDN, 0, &pdp->msisdn.l,
+ &pdp->msisdn.v, sizeof(pdp->msisdn.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ in_addr2gsna(&pdp->gsnlc, &gsn->gsnc);
+ in_addr2gsna(&pdp->gsnlu, &gsn->gsnu);
+
+ if (!pdp_tidget(&pdp_old, ((union gtp_packet*)pack)->gtp0.h.tid)) {
+ /* Found old pdp with same tid. Now the voodoo begins! */
+ /* We check that the APN, selection mode and MSISDN is the same */
+ if ( (pdp->apn_req.l == pdp_old->apn_req.l)
+ && (!memcmp(pdp->apn_req.v, pdp_old->apn_req.v, pdp->apn_req.l))
+ && (pdp->selmode == pdp_old->selmode)
+ && (pdp->msisdn.l == pdp_old->msisdn.l)
+ && (!memcmp(pdp->msisdn.v, pdp_old->msisdn.v, pdp->msisdn.l))) {
+ /* OK! We are dealing with the same APN. We will copy new
+ * parameters to the old pdp and send off confirmation
+ * We ignore the following information elements:
+ * QoS: MS will get originally negotiated QoS.
+ * End user address (EUA). MS will get old EUA anyway.
+ * Protocol configuration option (PCO): Only application can verify */
+
+ /* Copy remote flow label */
+ pdp_old->flru = pdp->flru;
+ pdp_old->flrc = pdp->flrc;
+
+ /* Copy peer GSN address */
+ pdp_old->gsnrc.l = pdp->gsnrc.l;
+ memcpy(&pdp_old->gsnrc.v, &pdp->gsnrc.v, pdp->gsnrc.l);
+ pdp_old->gsnru.l = pdp->gsnru.l;
+ memcpy(&pdp_old->gsnru.v, &pdp->gsnru.v, pdp->gsnru.l);
+
+ /* pdp_freepdp(pdp); not nessasary anymore since never allocated */
+ pdp = pdp_old;
+
+ /* Confirm to peer that things were "successful" */
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_ACC_REQ);
+ }
+ else { /* This is not the same PDP context. Delete the old one. */
+
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp_old);
+ pdp_freepdp(pdp_old);
+
+ }
+ }
+
+ pdp_newpdp(&pdp, imsi, nsapi, pdp);
+
+ /* Callback function to validata login */
+ if (gsn->cb_create_context !=0)
+ auth = gsn->cb_create_context(pdp);
+
+ /* Now send off a reply to the peer */
+ if (!auth) {
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_ACC_REQ);
+ }
+ else {
+ gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_USER_AUTH_FAIL);
+ pdp_freepdp(pdp);
+ return 0;
+ }
+}
+
+
+/* Handle Create PDP Context Response */
+int gtp_create_pdp_conf(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len) {
+ struct pdp_t *pdp;
+ union gtpie_member *ie[GTPIE_SIZE];
+ uint8_t cause, recovery;
+ void *aid = NULL;
+ uint8_t type = 0;
+
+ /* Remove packet from queue */
+ if (gtp_conf(gsn, 0, peer, pack, len, &type, &aid)) return EOF;
+
+ /* Find the context in question */
+ if (pdp_getgtp0(&pdp, ntoh16(((union gtp_packet*)pack)->gtp0.h.flow))) {
+ gsn->err_unknownpdp++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unknown PDP context");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, NULL, aid);
+ return EOF;
+ }
+
+ /* Decode information elements */
+ if (gtpie_decaps(ie, pack+GTP0_HEADER_SIZE, len-GTP0_HEADER_SIZE)) {
+ gsn->invalid++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Invalid message format");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+
+ /* Extract cause value (mandatory) */
+ if (gtpie_gettv1(ie, GTPIE_CAUSE, 0, &cause)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+
+ /* Extract recovery (optional) */
+ if (!gtpie_gettv1(ie, GTPIE_RECOVERY, 0, &recovery)) {
+ /* TODO: Handle received recovery IE */
+ }
+
+ /* Extract protocol configuration options (optional) */
+ if (!gtpie_gettlv(ie, GTPIE_PCO, 0, &pdp->pco_req.l,
+ &pdp->pco_req.v, sizeof(pdp->pco_req.v))) {
+ /* TODO: Handle PCO IE */
+ }
+
+ /* Check all conditional information elements */
+ if (GTPCAUSE_ACC_REQ == cause) {
+
+ if (gtpie_gettv0(ie, GTPIE_QOS_PROFILE0, 0, /* TODO: HACK only gtp0 */
+ &pdp->qos_neg0, sizeof(pdp->qos_neg0))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+ /* pdp->qos_neg.l = 3; * TODO: HACK only gtp0 */
+
+ if (gtpie_gettv1(ie, GTPIE_REORDER, 0, &pdp->reorder)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+
+ if (gtpie_gettv2(ie, GTPIE_FL_DI, 0, &pdp->flru)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+
+ if (gtpie_gettv2(ie, GTPIE_FL_C, 0, &pdp->flrc)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+
+ if (gtpie_gettv4(ie, GTPIE_CHARGING_ID, 0, &pdp->cid)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return gtp_create_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_EUA, 0, &pdp->eua.l,
+ &pdp->eua.v, sizeof(pdp->eua.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 0, &pdp->gsnrc.l,
+ &pdp->gsnrc.v, sizeof(pdp->gsnrc.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 1, &pdp->gsnru.l,
+ &pdp->gsnru.v, sizeof(pdp->gsnru.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ return EOF;
+ }
+ }
+
+ if (gsn->cb_conf) gsn->cb_conf(type, cause, pdp, aid);
+
+ return 0;
+}
+
+/* Send Update PDP Context Request */
+extern int gtp_update_pdp_req(struct gsn_t *gsn, int version, void *aid,
+ struct in_addr* inetaddr, struct pdp_t *pdp) {
+ union gtp_packet packet;
+ int length = 0;
+
+ get_default_gtp(0, &packet);
+
+ gtpie_tv0(packet.gtp0.p, &length, GTP_MAX, GTPIE_QOS_PROFILE0,
+ sizeof(pdp->qos_req0), pdp->qos_req0);
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_RECOVERY,
+ gsn->restart_counter);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_DI,
+ pdp->fllu);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_C,
+ pdp->fllc);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlc.l, pdp->gsnlc.v);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlu.l, pdp->gsnlu.v);
+
+ packet.gtp0.h.type = hton8(GTP_UPDATE_PDP_REQ);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.flow = 0;
+ packet.gtp0.h.tid = (pdp->imsi & 0x0fffffffffffffff) + ((uint64_t)pdp->nsapi << 60);
+
+ return gtp_req(gsn, 0, &packet, GTP0_HEADER_SIZE+length, inetaddr, aid);
+}
+
+/* Send Update PDP Context Response */
+int gtp_update_pdp_resp(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len,
+ struct pdp_t *pdp, uint8_t cause)
+{
+ union gtp_packet packet;
+ int length = 0;
+
+ get_default_gtp(0, &packet);
+
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_CAUSE, cause);
+
+ if (cause == GTPCAUSE_ACC_REQ) {
+ gtpie_tv0(packet.gtp0.p, &length, GTP_MAX, GTPIE_QOS_PROFILE0,
+ sizeof(pdp->qos_sub0), pdp->qos_sub0);
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_RECOVERY,
+ gsn->restart_counter);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_DI,
+ pdp->fllu);
+ gtpie_tv2(packet.gtp0.p, &length, GTP_MAX, GTPIE_FL_C,
+ pdp->fllc);
+ gtpie_tv4(packet.gtp0.p, &length, GTP_MAX, GTPIE_CHARGING_ID,
+ 0x12345678);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlc.l, pdp->gsnlc.v);
+ gtpie_tlv(packet.gtp0.p, &length, GTP_MAX, GTPIE_GSN_ADDR,
+ pdp->gsnlu.l, pdp->gsnlu.v);
+ }
+
+ packet.gtp0.h.type = hton8(GTP_UPDATE_PDP_RSP);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.flow = hton16(pdp->flrc);
+ packet.gtp0.h.seq = ((union gtp_packet*)pack)->gtp0.h.seq;
+ packet.gtp0.h.tid = (pdp->imsi & 0x0fffffffffffffff) + ((uint64_t)pdp->nsapi << 60);
+
+ return gtp_resp(0, gsn, &packet, GTP0_HEADER_SIZE+length, peer);
+}
+
+/* Handle Update PDP Context Request */
+int gtp_update_pdp_ind(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer, void *pack, unsigned len) {
+ struct pdp_t *pdp, *pdp2;
+ struct pdp_t pdp_buf;
+ union gtpie_member* ie[GTPIE_SIZE];
+ uint8_t recovery;
+
+ uint16_t seq = ntoh16(((union gtp_packet*)pack)->gtp0.h.seq);
+
+ /* Is this a dublicate ? */
+ if(!gtp_dublicate(gsn, 0, peer, seq)) {
+ return 0; /* We allready send of response once */
+ }
+
+ /* Find the pdp context in question */
+ if (pdp_getgtp0(&pdp, ntoh16(((union gtp_packet*)pack)->gtp0.h.flow))) {
+ gsn->err_unknownpdp++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unknown PDP context");
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, NULL,
+ GTPCAUSE_NON_EXIST);
+ }
+
+ /* Decode information elements */
+ if (gtpie_decaps(ie, pack+GTP0_HEADER_SIZE, len-GTP0_HEADER_SIZE)) {
+ gsn->invalid++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Invalid message format");
+ if (0 == version)
+ return EOF;
+ else
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_INVALID_MESSAGE);
+ }
+
+ pdp2 = &pdp_buf;
+ memcpy(pdp2, pdp, sizeof (struct pdp_t)); /* Generate local copy */
+
+ if (gtpie_gettv0(ie, GTPIE_QOS_PROFILE0, 0, /* TODO: HACK only gtp0 */
+ &pdp2->qos_req0, sizeof(pdp2->qos_req0))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, pdp2,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+ /* pdp2->qos_req.l = 3; * TODO: HACK only gtp0 */
+
+ /* Extract recovery (optional) */
+ if (!gtpie_gettv1(ie, GTPIE_RECOVERY, 0, &recovery)) {
+ /* TODO: Handle received recovery IE */
+ }
+
+ if (gtpie_gettv2(ie, GTPIE_FL_DI, 0, &pdp2->flru)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, pdp2,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettv2(ie, GTPIE_FL_C, 0, &pdp2->flrc)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, pdp2,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 0, &pdp2->gsnrc.l,
+ &pdp2->gsnrc.v, sizeof(pdp2->gsnrc.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, pdp2,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 1, &pdp2->gsnru.l,
+ &pdp2->gsnru.v, sizeof(pdp2->gsnru.v))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, pdp2,
+ GTPCAUSE_MAN_IE_MISSING);
+ }
+
+ /* OK! It seames as if we received a valid message */
+
+ memcpy(pdp, pdp2, sizeof (struct pdp_t)); /* Update original pdp */
+
+ /* Confirm to peer that things were "successful" */
+ return gtp_update_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_ACC_REQ);
+}
+
+
+/* Handle Update PDP Context Response */
+int gtp_update_pdp_conf(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len) {
+ struct pdp_t *pdp;
+ union gtpie_member *ie[GTPIE_SIZE];
+ uint8_t cause, recovery;
+ void *aid = NULL;
+ uint8_t type = 0;
+
+ /* Remove packet from queue */
+ if (gtp_conf(gsn, 0, peer, pack, len, &type, &aid)) return EOF;
+
+ /* Find the context in question */
+ if (pdp_getgtp0(&pdp, ntoh16(((union gtp_packet*)pack)->gtp0.h.flow))) {
+ gsn->err_unknownpdp++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unknown PDP context");
+ if (gsn->cb_conf) gsn->cb_conf(type, cause, NULL, aid);
+ return EOF;
+ }
+
+ /* Decode information elements */
+ if (gtpie_decaps(ie, pack+GTP0_HEADER_SIZE, len-GTP0_HEADER_SIZE)) {
+ gsn->invalid++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Invalid message format");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
+ pdp_freepdp(pdp);
+ return EOF;
+ }
+
+ /* Extract cause value (mandatory) */
+ if (gtpie_gettv1(ie, GTPIE_CAUSE, 0, &cause)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
+ pdp_freepdp(pdp);
+ return EOF;
+ }
+
+ /* Extract recovery (optional) */
+ if (!gtpie_gettv1(ie, GTPIE_RECOVERY, 0, &recovery)) {
+ /* TODO: Handle received recovery IE */
+ }
+
+ /* Check all conditional information elements */
+ if (GTPCAUSE_ACC_REQ != cause) {
+ if (gsn->cb_conf) gsn->cb_conf(type, cause, pdp, aid);
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
+ pdp_freepdp(pdp);
+ return 0;
+ }
+ else {
+ /* Check for missing conditionary information elements */
+ if (!(gtpie_exist(ie, GTPIE_QOS_PROFILE0, 0) &&
+ gtpie_exist(ie, GTPIE_REORDER, 0) &&
+ gtpie_exist(ie, GTPIE_FL_DI, 0) &&
+ gtpie_exist(ie, GTPIE_FL_C, 0) &&
+ gtpie_exist(ie, GTPIE_CHARGING_ID, 0) &&
+ gtpie_exist(ie, GTPIE_EUA, 0) &&
+ gtpie_exist(ie, GTPIE_GSN_ADDR, 0) &&
+ gtpie_exist(ie, GTPIE_GSN_ADDR, 1))) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing conditional information field");
+ if (gsn->cb_conf) gsn->cb_conf(type, EOF, pdp, aid);
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
+ pdp_freepdp(pdp);
+ return EOF;
+ }
+
+ /* Update pdp with new values */
+ gtpie_gettv0(ie, GTPIE_QOS_PROFILE0, 0,
+ pdp->qos_neg0, sizeof(pdp->qos_neg0));
+ gtpie_gettv1(ie, GTPIE_REORDER, 0, &pdp->reorder);
+ gtpie_gettv2(ie, GTPIE_FL_DI, 0, &pdp->flru);
+ gtpie_gettv2(ie, GTPIE_FL_C, 0, &pdp->flrc);
+ gtpie_gettv4(ie, GTPIE_CHARGING_ID, 0, &pdp->cid);
+ gtpie_gettlv(ie, GTPIE_EUA, 0, &pdp->eua.l,
+ &pdp->eua.v, sizeof(pdp->eua.v));
+ gtpie_gettlv(ie, GTPIE_GSN_ADDR, 0, &pdp->gsnrc.l,
+ &pdp->gsnrc.v, sizeof(pdp->gsnrc.v));
+ gtpie_gettlv(ie, GTPIE_GSN_ADDR, 1, &pdp->gsnru.l,
+ &pdp->gsnru.v, sizeof(pdp->gsnru.v));
+
+ if (gsn->cb_conf) gsn->cb_conf(type, cause, pdp, aid);
+ return 0; /* Succes */
+ }
+}
+
+/* Send Delete PDP Context Request */
+extern int gtp_delete_pdp_req(struct gsn_t *gsn, int version, void *aid,
+ struct pdp_t *pdp) {
+ union gtp_packet packet;
+ int length = 0;
+ struct in_addr addr;
+
+ if (gsna2in_addr(&addr, &pdp->gsnrc)) {
+ gsn->err_address++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "GSN address conversion failed");
+ return EOF;
+ }
+
+ get_default_gtp(0, &packet);
+
+ packet.gtp0.h.type = hton8(GTP_DELETE_PDP_REQ);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.flow = hton16(pdp->flrc);
+ packet.gtp0.h.tid = (pdp->imsi & 0x0fffffffffffffff) + ((uint64_t)pdp->nsapi << 60);
+
+ return gtp_req(gsn, 0, &packet, GTP0_HEADER_SIZE+length, &addr, aid);
+}
+
+/* Send Delete PDP Context Response */
+int gtp_delete_pdp_resp(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len,
+ struct pdp_t *pdp, uint8_t cause)
+{
+ union gtp_packet packet;
+ int length = 0;
+ uint16_t flow = 0;
+
+ if (pdp) flow = hton16(pdp->flrc);
+
+ get_default_gtp(0, &packet);
+
+ gtpie_tv1(packet.gtp0.p, &length, GTP_MAX, GTPIE_CAUSE, cause);
+
+ packet.gtp0.h.type = hton8(GTP_DELETE_PDP_RSP);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.flow = flow;
+ packet.gtp0.h.seq = ((union gtp_packet*)pack)->gtp0.h.seq;
+ packet.gtp0.h.tid = ((union gtp_packet*)pack)->gtp0.h.tid;
+
+ if (pdp) {
+ /* Callback function to allow application to clean up */
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
+ pdp_freepdp(pdp); /* Clean up PDP context */
+ }
+
+ return gtp_resp(0, gsn, &packet, GTP0_HEADER_SIZE+length, peer);
+}
+
+/* Handle Delete PDP Context Request */
+int gtp_delete_pdp_ind(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer, void *pack, unsigned len) {
+ struct pdp_t *pdp;
+ union gtpie_member* ie[GTPIE_SIZE];
+ uint16_t seq = ntoh16(((union gtp_packet*)pack)->gtp0.h.seq);
+
+ /* Is this a dublicate ? */
+ if(!gtp_dublicate(gsn, 0, peer, seq)) {
+ return 0;
+ }
+
+ /* Find the pdp context in question */
+ if (pdp_getgtp0(&pdp, ntoh16(((union gtp_packet*)pack)->gtp0.h.flow))) {
+ gsn->err_unknownpdp++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unknown PDP context");
+ if (0 == version)
+ return gtp_delete_pdp_resp(gsn, version, peer, pack, len, NULL,
+ GTPCAUSE_ACC_REQ);
+ else
+ return gtp_delete_pdp_resp(gsn, version, peer, pack, len, NULL,
+ GTPCAUSE_NON_EXIST);
+ }
+
+ /* Decode information elements */
+ if (gtpie_decaps(ie, pack+GTP0_HEADER_SIZE, len-GTP0_HEADER_SIZE)) {
+ gsn->invalid++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Invalid message format");
+ if (0 == version)
+ return EOF;
+ else
+ return gtp_delete_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_INVALID_MESSAGE);
+ }
+
+ return gtp_delete_pdp_resp(gsn, version, peer, pack, len, pdp,
+ GTPCAUSE_ACC_REQ);
+}
+
+
+/* Handle Delete PDP Context Response */
+int gtp_delete_pdp_conf(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len) {
+ struct pdp_t *pdp;
+ union gtpie_member *ie[GTPIE_SIZE];
+ uint8_t cause;
+ void *aid = NULL;
+ uint8_t type = 0;
+
+ /* Remove packet from queue */
+ if (gtp_conf(gsn, 0, peer, pack, len, &type, &aid)) return EOF;
+
+ /* Find the context in question */
+ if (pdp_getgtp0(&pdp, ntoh16(((union gtp_packet*)pack)->gtp0.h.flow))) {
+ gsn->err_unknownpdp++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unknown PDP context");
+ return EOF;
+ }
+
+ /* Decode information elements */
+ if (gtpie_decaps(ie, pack+GTP0_HEADER_SIZE, len-GTP0_HEADER_SIZE)) {
+ gsn->invalid++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Invalid message format");
+ return EOF;
+ }
+
+ /* Extract cause value */
+ if (gtpie_gettv1(ie, GTPIE_CAUSE, 0, &cause)) {
+ gsn->missing++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Missing mandatory information field");
+ return EOF;
+ }
+
+ /* Check the cause value */
+ if ((GTPCAUSE_ACC_REQ != cause) && (GTPCAUSE_NON_EXIST != cause)) {
+ gsn->err_cause++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unexpected cause value received: %d", cause);
+ return EOF;
+ }
+
+ /* Callback function to allow application to clean up */
+ if (gsn->cb_conf) gsn->cb_conf(type, cause, pdp, aid);
+
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
+ pdp_freepdp(pdp);
+
+ return 0;
+}
+
+/* Send Error Indication (response to a GPDU message */
+int gtp_error_ind_resp(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len)
+{
+ union gtp_packet packet;
+ int length = 0;
+
+ get_default_gtp(0, &packet);
+
+ packet.gtp0.h.type = hton8(GTP_ERROR);
+ packet.gtp0.h.length = hton16(length);
+ packet.gtp0.h.flow = 0;
+ packet.gtp0.h.seq = ((union gtp_packet*)pack)->gtp0.h.seq;
+ packet.gtp0.h.tid = ((union gtp_packet*)pack)->gtp0.h.tid;
+
+ return gtp_resp(0, gsn, &packet, GTP0_HEADER_SIZE+length, peer);
+}
+
+/* Handle Error Indication */
+int gtp_error_ind_conf(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len) {
+ struct pdp_t *pdp;
+
+ /* Find the context in question */
+ if (pdp_tidget(&pdp, ((union gtp_packet*)pack)->gtp0.h.tid)) {
+ gsn->err_unknownpdp++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unknown PDP context");
+ return EOF;
+ }
+
+ gsn->err_unknownpdp++; /* TODO: Change counter */
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Received Error Indication");
+
+ if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
+ pdp_freepdp(pdp);
+ return 0;
+}
+
+int gtp_gpdu_ind(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack,
+ unsigned len) {
+
+ /* Need to include code to verify packet src and dest addresses */
+ struct pdp_t *pdp;
+
+ if (pdp_getgtp0(&pdp, ntoh16(((union gtp_packet*)pack)->gtp0.h.flow))) {
+ gsn->err_unknownpdp++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, peer, pack, len,
+ "Unknown PDP context");
+ return gtp_error_ind_resp(gsn, version, peer, pack, len);
+
+ }
+
+ /* Callback function */
+ if (gsn->cb_gpdu !=0)
+ return gsn->cb_gpdu(pdp, pack+20, len-20); /* TODO ???? */
+
+ return 0;
+}
+
+
+/* Receives GTP packet and sends off for further processing
+ * Function will check the validity of the header. If the header
+ * is not valid the packet is either dropped or a version not
+ * supported is returned to the peer.
+ * TODO: Need to decide on return values! */
+int gtp_decaps(struct gsn_t *gsn)
+{
+ unsigned char buffer[PACKET_MAX + 64 /*TODO: ip header */ ];
+ int status, ip_len = 0;
+ struct sockaddr_in peer;
+ int peerlen;
+ struct gtp0_header *pheader;
+ int version = 0; /* GTP version should be determined from header!*/
+
+ peerlen = sizeof(peer);
+ if ((status =
+ recvfrom(gsn->fd, buffer, sizeof(buffer), 0,
+ (struct sockaddr *) &peer, &peerlen)) < 0 ) {
+ gsn->err_readfrom++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "recvfrom(fd=%d, buffer=%lx, len=%d) failed: status = %d error = %s", gsn->fd, (unsigned long) buffer, sizeof(buffer), status, status ? strerror(errno) : "No error");
+ return -1;
+ }
+
+ /* Strip off IP header, if present: TODO Is this nessesary? */
+ if ((buffer[0] & 0xF0) == 0x40) {
+ ip_len = (buffer[0] & 0xF) * 4;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, &peer, buffer, status,
+ "IP header found in return from read");
+ return -1;
+ }
+
+ /* Need at least 1 byte in order to check version */
+ if (status < (1)) {
+ gsn->empty++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, &peer, buffer, status,
+ "Discarding packet - too small");
+ return -1;
+ }
+
+ /* TODO: Remove these ERROR MESSAGES
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Discarding packet - too small");
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, &peer, buffer, status,
+ "Discarding packet - too small"); */
+
+ pheader = (struct gtp0_header *) (buffer + ip_len);
+
+ /* Version should be gtp0 (or earlier in theory) */
+ if (((pheader->flags & 0xe0) > 0x00)) {
+ gsn->unsup++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, &peer, buffer, status,
+ "Unsupported GTP version");
+ return gtp_unsup_resp(gsn, &peer, buffer, status); /* 29.60: 11.1.1 */
+ }
+
+ /* Check length of gtp0 packet */
+ if (((pheader->flags & 0xe0) == 0x00) && (status < GTP0_HEADER_SIZE)) {
+ gsn->tooshort++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, &peer, buffer, status,
+ "GTP0 packet too short");
+ return -1; /* Silently discard 29.60: 11.1.2 */
+ }
+
+ switch (pheader->type) {
+ case GTP_ECHO_REQ:
+ return gtp_echo_ind(gsn, &peer, buffer+ip_len, status - ip_len);
+ case GTP_ECHO_RSP:
+ return gtp_echo_conf(gsn, &peer, buffer+ip_len, status - ip_len);
+ case GTP_NOT_SUPPORTED:
+ return gtp_unsup_conf(gsn, &peer, buffer+ip_len, status - ip_len);
+ case GTP_CREATE_PDP_REQ:
+ return gtp_create_pdp_ind(gsn, version, &peer, buffer+ip_len,
+ status - ip_len);
+ case GTP_CREATE_PDP_RSP:
+ return gtp_create_pdp_conf(gsn, version, &peer, buffer+ip_len,
+ status - ip_len);
+ case GTP_UPDATE_PDP_REQ:
+ return gtp_update_pdp_ind(gsn, version, &peer, buffer+ip_len,
+ status - ip_len);
+ case GTP_UPDATE_PDP_RSP:
+ return gtp_update_pdp_conf(gsn, version, &peer, buffer+ip_len,
+ status - ip_len);
+ case GTP_DELETE_PDP_REQ:
+ return gtp_delete_pdp_ind(gsn, version, &peer, buffer+ip_len,
+ status - ip_len);
+ case GTP_DELETE_PDP_RSP:
+ return gtp_delete_pdp_conf(gsn, version, &peer, buffer+ip_len,
+ status - ip_len);
+ case GTP_ERROR:
+ return gtp_error_ind_conf(gsn, version, &peer, buffer+ip_len,
+ status - ip_len);
+ case GTP_GPDU:
+ return gtp_gpdu_ind(gsn, version, &peer, buffer+ip_len, status - ip_len);
+ default:
+ {
+ gsn->unknown++;
+ gtp_errpack(LOG_ERR, __FILE__, __LINE__, &peer, buffer, status,
+ "Unknown GTP message type received");
+ return -1;
+ }
+ }
+}
+
+int gtp_gpdu(struct gsn_t *gsn, struct pdp_t* pdp,
+ void *pack, unsigned len)
+{
+ union gtp_packet packet;
+ struct sockaddr_in addr;
+
+ /*printf("gtp_encaps start\n");
+ print_packet(pack, len);*/
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+
+ memcpy(&addr.sin_addr, pdp->gsnru.v,pdp->gsnru.l); /* TODO range check */
+ addr.sin_port = htons(GTP0_PORT);
+
+ get_default_gtp(0, &packet);
+ packet.gtp0.h.type = hton8(GTP_GPDU);
+ packet.gtp0.h.length = hton16(len);
+ packet.gtp0.h.seq = hton16(pdp->gtpsntx++);
+ packet.gtp0.h.flow = hton16(pdp->flru);
+ packet.gtp0.h.tid = (pdp->imsi & 0x0fffffffffffffff) + ((uint64_t)pdp->nsapi << 60);
+
+ if (len > sizeof (union gtp_packet) - sizeof(struct gtp0_header)) {
+ gsn->err_memcpy++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__,
+ "Memcpy failed");
+ return EOF;
+ }
+
+ memcpy(packet.gtp0.p, pack, len); /* TODO Should be avoided! */
+
+ if (sendto(gsn->fd, &packet, GTP0_HEADER_SIZE+len, 0,
+ (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ gsn->err_sendto++;
+ gtp_err(LOG_ERR, __FILE__, __LINE__, "Sendto(fd=%d, msg=%lx, len=%d) failed: Error = %s", gsn->fd, (unsigned long) &packet, GTP0_HEADER_SIZE+len, strerror(errno));
+ return EOF;
+ }
+ return 0;
+}
+
+
+/* ***********************************************************
+ * Conversion functions
+ *************************************************************/
+
+int char2ul_t(char* src, struct ul_t dst) {
+ dst.l = strlen(src)+1;
+ dst.v = malloc(dst.l);
+ dst.v[0] = dst.l - 1;
+ memcpy(&dst.v[1], src, dst.v[0]);
+ return 0;
+}
+
+/* ***********************************************************
+ * IP address conversion functions
+ * There exist several types of address representations:
+ * - eua: End User Address. (29.060, 7.7.27, message type 128)
+ * Used for signalling address to mobile station. Supports IPv4
+ * IPv6 x.25 etc. etc.
+ * - gsna: GSN Address. (29.060, 7.7.32, message type 133): IP address
+ * of GSN. If length is 4 it is IPv4. If length is 16 it is IPv6.
+ * - in_addr: IPv4 address struct.
+ * - sockaddr_in: Socket API representation of IP address and
+ * port number.
+ *************************************************************/
+
+int ipv42eua(struct ul66_t *eua, struct in_addr *src) {
+ eua->v[0] = 0xf1; /* IETF */
+ eua->v[1] = 0x21; /* IPv4 */
+ if (src) {
+ eua->l = 6;
+ memcpy(&eua->v[2], src, 4);
+ }
+ else
+ {
+ eua->l = 2;
+ }
+ return 0;
+}
+
+int eua2ipv4(struct in_addr *dst, struct ul66_t *eua) {
+ if ((eua->l != 6) ||
+ (eua->v[0] != 0xf1) ||
+ (eua->v[1] = 0x21))
+ return -1; /* Not IPv4 address*/
+ memcpy(dst, &eua->v[2], 4);
+ return 0;
+}
+
+int gsna2in_addr(struct in_addr *dst, struct ul16_t *gsna) {
+ memset(dst, 0, sizeof(struct in_addr));
+ if (gsna->l != 4) return EOF; /* Return if not IPv4 */
+ memcpy(dst, gsna->v, gsna->l);
+ return 0;
+}
+
+int in_addr2gsna(struct ul16_t *gsna, struct in_addr *src) {
+ memset(gsna, 0, sizeof(struct ul16_t));
+ gsna->l = 4;
+ memcpy(gsna->v, src, gsna->l);
+ return 0;
+}
+
diff --git a/gtp/gtp.h b/gtp/gtp.h
new file mode 100644
index 0000000..2a4e57a
--- /dev/null
+++ b/gtp/gtp.h
@@ -0,0 +1,339 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+#ifndef _GTP_H
+#define _GTP_H
+
+#define GTP0_PORT 3386
+#define GTP1C_PORT 2123
+#define GTP1U_PORT 2152
+#define PACKET_MAX 8196
+
+#define GTP_MAX 0xffff /* TODO: Choose right number */
+#define GTP0_HEADER_SIZE 20
+#define GTP1_HEADER_SIZE_SHORT 8
+#define GTP1_HEADER_SIZE_LONG 12
+
+#define SYSLOG_PRINTSIZE 255
+#define ERRMSG_SIZE 255
+
+#define RESTART_FILE "gsn_restart"
+#define NAMESIZE 1024
+
+/* GTP version 1 message type definitions. Also covers version 0 except *
+ * for anonymous PDP context which was superceded in version 1 */
+
+/* 0 For future use. */
+#define GTP_ECHO_REQ 1 /* Echo Request */
+#define GTP_ECHO_RSP 2 /* Echo Response */
+#define GTP_NOT_SUPPORTED 3 /* Version Not Supported */
+#define GTP_ALIVE_REQ 4 /* Node Alive Request */
+#define GTP_ALIVE_RSP 5 /* Node Alive Response */
+#define GTP_REDIR_REQ 6 /* Redirection Request */
+#define GTP_REDIR_RSP 7 /* Redirection Response */
+/* 8-15 For future use. */
+#define GTP_CREATE_PDP_REQ 16 /* Create PDP Context Request */
+#define GTP_CREATE_PDP_RSP 17 /* Create PDP Context Response */
+#define GTP_UPDATE_PDP_REQ 18 /* Update PDP Context Request */
+#define GTP_UPDATE_PDP_RSP 19 /* Update PDP Context Response */
+#define GTP_DELETE_PDP_REQ 20 /* Delete PDP Context Request */
+#define GTP_DELETE_PDP_RSP 21 /* Delete PDP Context Response */
+/* 22-25 For future use. */ /* In version GTP 1 anonomous PDP context */
+#define GTP_ERROR 26 /* Error Indication */
+#define GTP_PDU_NOT_REQ 27 /* PDU Notification Request */
+#define GTP_PDU_NOT_RSP 28 /* PDU Notification Response */
+#define GTP_PDU_NOT_REJ_REQ 29 /* PDU Notification Reject Request */
+#define GTP_PDU_NOT_REJ_RSP 30 /* PDU Notification Reject Response */
+#define GTP_SUPP_EXT_HEADER 31 /* Supported Extension Headers Notification */
+#define GTP_SND_ROUTE_REQ 32 /* Send Routeing Information for GPRS Request */
+#define GTP_SND_ROUTE_RSP 33 /* Send Routeing Information for GPRS Response */
+#define GTP_FAILURE_REQ 34 /* Failure Report Request */
+#define GTP_FAILURE_RSP 35 /* Failure Report Response */
+#define GTP_MS_PRESENT_REQ 36 /* Note MS GPRS Present Request */
+#define GTP_MS_PRESENT_RSP 37 /* Note MS GPRS Present Response */
+/* 38-47 For future use. */
+#define GTP_IDEN_REQ 48 /* Identification Request */
+#define GTP_IDEN_RSP 49 /* Identification Response */
+#define GTP_SGSN_CONTEXT_REQ 50 /* SGSN Context Request */
+#define GTP_SGSN_CONTEXT_RSP 51 /* SGSN Context Response */
+#define GTP_SGSN_CONTEXT_ACK 52 /* SGSN Context Acknowledge */
+#define GTP_FWD_RELOC_REQ 53 /* Forward Relocation Request */
+#define GTP_FWD_RELOC_RSP 54 /* Forward Relocation Response */
+#define GTP_FWD_RELOC_COMPL 55 /* Forward Relocation Complete */
+#define GTP_RELOC_CANCEL_REQ 56 /* Relocation Cancel Request */
+#define GTP_RELOC_CANCEL_RSP 57 /* Relocation Cancel Response */
+#define GTP_FWD_SRNS 58 /* Forward SRNS Context */
+#define GTP_FWD_RELOC_ACK 59 /* Forward Relocation Complete Acknowledge */
+#define GTP_FWD_SRNS_ACK 60 /* Forward SRNS Context Acknowledge */
+/* 61-239 For future use. */
+#define GTP_DATA_TRAN_REQ 240 /* Data Record Transfer Request */
+#define GTP_DATA_TRAN_RSP 241 /* Data Record Transfer Response */
+/* 242-254 For future use. */
+#define GTP_GPDU 255 /* G-PDU */
+
+/* GTP 0 header.
+ * Explanation to some of the fields:
+ * SNDCP NPDU Number flag = 0 except for inter SGSN handover situations
+ * SNDCP N-PDU LCC Number 0 = 0xff except for inter SGSN handover situations
+ * Sequence number. Used for reliable delivery of signalling messages, and
+ * to discard "illegal" data messages.
+ * Flow label. Is used to point a particular PDP context. Is used in data
+ * messages as well as signalling messages related to a particular context.
+ * Tunnel ID is IMSI+NSAPI. Unique identifier of PDP context. Is somewhat
+ * redundant because the header also includes flow. */
+
+struct gtp0_header { /* Descriptions from 3GPP 09.60 */
+ u_int8_t flags; /* 01 bitfield, with typical values */
+ /* 000..... Version: 1 (0) */
+ /* ...1111. Spare (7) */
+ /* .......0 SNDCP N-PDU Number flag (0) */
+ u_int8_t type; /* 02 Message type. T-PDU = 0xff */
+ u_int16_t length; /* 03 Length (of G-PDU excluding header) */
+ u_int16_t seq; /* 05 Sequence Number */
+ u_int16_t flow; /* 07 Flow Label ( = 0 for signalling) */
+ u_int8_t number; /* 09 SNDCP N-PDU LCC Number ( 0 = 0xff) */
+ u_int8_t spare1; /* 10 Spare */
+ u_int8_t spare2; /* 11 Spare */
+ u_int8_t spare3; /* 12 Spare */
+ u_int64_t tid; /* 13 Tunnel ID */
+}; /* 20 */
+
+struct gtp1_header_short { /* Descriptions from 3GPP 29060 */
+ u_int8_t flags; /* 01 bitfield, with typical values */
+ /* 000..... Version: 1 */
+ /* ...1.... Protocol Type: GTP=1, GTP'=0 */
+ /* ....1... Spare = 1 */
+ /* .....1.. Extension header flag: 1 */
+ /* ......1. Sequence number flag: 1 */
+ /* .......0 PN: N-PDU Number flag */
+ u_int8_t type; /* 02 Message type. T-PDU = 0xff */
+ u_int16_t length; /* 03 Length (of IP packet or signalling) */
+ u_int64_t tid; /* 05 - 08 Tunnel ID */
+};
+
+struct gtp1_header_long { /* Descriptions from 3GPP 29060 */
+ u_int8_t flags; /* 01 bitfield, with typical values */
+ /* 000..... Version: 1 */
+ /* ...1.... Protocol Type: GTP=1, GTP'=0 */
+ /* ....1... Spare = 1 */
+ /* .....1.. Extension header flag: 1 */
+ /* ......1. Sequence number flag: 1 */
+ /* .......0 PN: N-PDU Number flag */
+ u_int8_t type; /* 02 Message type. T-PDU = 0xff */
+ u_int16_t length; /* 03 Length (of IP packet or signalling) */
+ u_int64_t tid; /* 05 Tunnel ID */
+ u_int16_t seq; /* 10 Sequence Number */
+ u_int8_t npdu; /* 11 N-PDU Number */
+ u_int8_t next; /* 12 Next extension header type. Empty = 0 */
+};
+
+struct gtp0_packet {
+ struct gtp0_header h;
+ u_int8_t p[GTP_MAX];
+} __attribute__((packed));
+
+struct gtp1_packet_short {
+ struct gtp1_header_short h;
+ u_int8_t p[GTP_MAX];
+} __attribute__((packed));
+
+struct gtp1_packet_long {
+ struct gtp1_header_long h;
+ u_int8_t p[GTP_MAX];
+} __attribute__((packed));
+
+union gtp_packet {
+ u_int8_t flags;
+ struct gtp0_packet gtp0;
+ struct gtp1_packet_short gtp1s;
+ struct gtp1_packet_long gtp1l;
+} __attribute__((packed)) h;
+
+
+
+
+/* ***********************************************************
+ * Information storage for each gsn instance
+ *
+ * Normally each instance of the application corresponds to
+ * one instance of a gsn.
+ *
+ * In order to avoid global variables in the application, and
+ * also in order to allow several instances of a gsn in the same
+ * application this struct is provided in order to store all
+ * relevant information related to the gsn.
+ *
+ * Note that this does not include information storage for '
+ * each pdp context. This is stored in another struct.
+ *************************************************************/
+
+struct gsn_t {
+ /* Parameters related to the network interface */
+
+ int fd; /* File descriptor to network interface */
+ struct in_addr gsnc; /* IP address of this gsn for signalling */
+ struct in_addr gsnu; /* IP address of this gsn for user traffic */
+
+ /* Parameters related to signalling messages */
+ uint16_t seq_next; /* Next sequence number to use */
+ int seq_first; /* First packet in queue (oldest timeout) */
+ int seq_last; /* Last packet in queue (youngest timeout) */
+
+ unsigned char restart_counter; /* Increment on restart. Stored on disk */
+ char *statedir; /* Disk location for permanent storage */
+
+ struct queue_t *queue_req; /* Request queue */
+ struct queue_t *queue_resp; /* Response queue */
+
+ /* Call back functions */
+ int (*cb_delete_context) (struct pdp_t*);
+ int (*cb_create_context) (struct pdp_t*);
+ int (*cb_conf) (int type, int cause, struct pdp_t *pdp, void* aid);
+ int (*cb_gpdu) (struct pdp_t* pdp, void* pack, unsigned len);
+
+ /* Counters */
+
+ uint64_t err_socket; /* Number of socket errors */
+ uint64_t err_readfrom; /* Number of readfrom errors */
+ uint64_t err_sendto; /* Number of sendto errors */
+ uint64_t err_memcpy; /* Number of memcpy */
+ uint64_t err_queuefull; /* Number of times queue was full */
+ uint64_t err_seq; /* Number of seq out of range */
+ uint64_t err_address; /* GSN address conversion failed */
+ uint64_t err_unknownpdp; /* GSN address conversion failed */
+ uint64_t err_unknowntid; /* Application supplied unknown imsi+nsapi */
+ uint64_t err_cause; /* Unexpected cause value received */
+ uint64_t err_outofpdp; /* Out of storage for PDP contexts */
+
+ uint64_t empty; /* Number of empty packets */
+ uint64_t unsup; /* Number of unsupported version 29.60 11.1.1 */
+ uint64_t tooshort; /* Number of too short headers 29.60 11.1.2 */
+ uint64_t unknown; /* Number of unknown messages 29.60 11.1.3 */
+ uint64_t unexpect; /* Number of unexpected messages 29.60 11.1.4 */
+ uint64_t dublicate; /* Number of dublicate or unsolicited replies */
+ uint64_t missing; /* Number of missing mandatory field messages */
+ uint64_t invalid; /* Number of invalid message format messages */
+};
+
+
+/* External API functions */
+
+extern const char* gtp_version();
+extern int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen);
+extern int gtp_free(struct gsn_t *gsn);
+
+extern int gtp_newpdp(struct gsn_t *gsn, struct pdp_t **pdp,
+ uint64_t imsi, uint8_t nsapi);
+extern int gtp_freepdp(struct gsn_t *gsn, struct pdp_t *pdp);
+
+extern int gtp_create_context(struct gsn_t *gsn, struct pdp_t *pdp, void *aid,
+ struct in_addr* inetaddr);
+extern int gtp_update_context(struct gsn_t *gsn, struct pdp_t *pdp, void *aid,
+ struct in_addr* inetaddr);
+extern int gtp_delete_context(struct gsn_t *gsn, struct pdp_t *pdp, void *aid);
+
+extern int gtp_gpdu(struct gsn_t *gsn, struct pdp_t *pdp,
+ void *pack, unsigned len);
+
+extern int gtp_fd(struct gsn_t *gsn);
+extern int gtp_decaps(struct gsn_t *gsn);
+extern int gtp_retrans(struct gsn_t *gsn);
+extern int gtp_retranstimeout(struct gsn_t *gsn, struct timeval *timeout);
+
+/*
+extern int gtp_set_cb_newpdp(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*));
+extern int gtp_set_cb_freepdp(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*));
+extern int gtp_set_cb_create_pdp_ind(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*));
+extern int gtp_set_cb_create_pdp_conf(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*, int));
+extern int gtp_set_cb_update_pdp_conf(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*, int, int));
+extern int gtp_set_cb_delete_pdp_ind(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*));
+extern int gtp_set_cb_delete_pdp_conf(struct gsn_t *gsn,
+ int (*cb) (struct pdp_t*, int));
+*/
+
+extern int gtp_set_cb_delete_context(struct gsn_t *gsn,
+ int (*cb_delete_context) (struct pdp_t* pdp));
+extern int gtp_set_cb_create_context(struct gsn_t *gsn,
+ int (*cb_create_context) (struct pdp_t* pdp));
+extern int gtp_set_cb_conf(struct gsn_t *gsn,
+ int (*cb) (int type, int cause, struct pdp_t* pdp, void *aid));
+extern int gtp_set_cb_gpdu(struct gsn_t *gsn,
+ int (*cb_gpdu) (struct pdp_t* pdp, void* pack, unsigned len));
+
+
+/* Internal functions (not part of the API */
+
+extern int gtp_echo_req(struct gsn_t *gsn, struct in_addr *inetaddrs);
+extern int gtp_echo_resp(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len);
+extern int gtp_echo_ind(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len);
+extern int gtp_echo_conf(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len);
+
+extern int gtp_unsup_resp(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len);
+extern int gtp_unsup_conf(struct gsn_t *gsn, struct sockaddr_in *peer,
+ void *pack, unsigned len);
+
+extern int gtp_create_pdp_req(struct gsn_t *gsn, int version, void *aid,
+ struct in_addr* inetaddr, struct pdp_t *pdp);
+
+extern int gtp_create_pdp_resp(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len,
+ struct pdp_t *pdp, uint8_t cause);
+
+extern int gtp_create_pdp_ind(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len);
+
+extern int gtp_create_pdp_conf(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len);
+
+extern int gtp_update_pdp_req(struct gsn_t *gsn, int version, void *aid,
+ struct in_addr* inetaddr, struct pdp_t *pdp);
+
+extern int gtp_delete_pdp_req(struct gsn_t *gsn, int version, void *aid,
+ struct pdp_t *pdp);
+
+extern int gtp_delete_pdp_resp(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len,
+ struct pdp_t *pdp, uint8_t cause);
+
+extern int gtp_delete_pdp_ind(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len);
+
+extern int gtp_delete_pdp_conf(struct gsn_t *gsn, int version,
+ struct sockaddr_in *peer,
+ void *pack, unsigned len);
+
+
+extern int ipv42eua(struct ul66_t *eua, struct in_addr *src);
+extern int eua2ipv4(struct in_addr *dst, struct ul66_t *eua);
+extern int gsna2in_addr(struct in_addr *dst, struct ul16_t *gsna);
+extern int in_addr2gsna(struct ul16_t *gsna, struct in_addr *src);
+
+#endif /* !_GTP_H */
diff --git a/gtp/gtpie.c b/gtp/gtpie.c
new file mode 100644
index 0000000..8fd4a20
--- /dev/null
+++ b/gtp/gtpie.c
@@ -0,0 +1,513 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+/*
+ * gtpie.c: Contains functions to encapsulate and decapsulate GTP
+ * information elements
+ *
+ *
+ * Encapsulation
+ * - gtpie_tlv, gtpie_tv0, gtpie_tv1, gtpie_tv2 ... Adds information
+ * elements to a buffer.
+ *
+ * Decapsulation
+ * - gtpie_decaps: Returns array with pointers to information elements.
+ * - getie_getie: Returns the pointer of a particular element.
+ * - gtpie_gettlv: Copies tlv information element. Return 0 on success.
+ * - gtpie_gettv: Copies tv information element. Return 0 on success.
+ *
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <string.h>
+
+#include "gtpie.h"
+
+int gtpie_tlv(void *p, int *length, int size, u_int8_t t, int l, void *v) {
+ if ((*length + 3 + l) >= size) return 1;
+ ((union gtpie_member*) (p + *length))->tlv.t = hton8(t);
+ ((union gtpie_member*) (p + *length))->tlv.l = hton16(l);
+ memcpy((void*) (p + *length +3), v, l);
+ *length += 3 + l;
+ return 0;
+}
+
+int gtpie_tv0(void *p, int *length, int size, u_int8_t t, int l, u_int8_t *v) {
+ if ((*length + 1 + l) >= size) return 1;
+ ((union gtpie_member*) (p + *length))->tv0.t = hton8(t);
+ memcpy((void*) (p + *length +1), v, l);
+ *length += 1 + l;
+ return 0;
+}
+
+int gtpie_tv1(void *p, int *length, int size, u_int8_t t, u_int8_t v) {
+ if ((*length + 2) >= size) return 1;
+ ((union gtpie_member*) (p + *length))->tv1.t = hton8(t);
+ ((union gtpie_member*) (p + *length))->tv1.v = hton8(v);
+ *length += 2;
+ return 0;
+}
+
+int gtpie_tv2(void *p, int *length, int size, u_int8_t t, u_int16_t v) {
+ if ((*length + 3) >= size) return 1;
+ ((union gtpie_member*) (p + *length))->tv2.t = hton8(t);
+ ((union gtpie_member*) (p + *length))->tv2.v = hton16(v);
+ *length += 3;
+ return 0;
+}
+
+int gtpie_tv4(void *p, int *length, int size, u_int8_t t, u_int32_t v) {
+ if ((*length + 5) >= size) return 1;
+ ((union gtpie_member*) (p + *length))->tv4.t = hton8(t);
+ ((union gtpie_member*) (p + *length))->tv4.v = hton32(v);
+ *length += 5;
+ return 0;
+}
+
+int gtpie_getie(union gtpie_member* ie[], int type, int instance) {
+ int j;
+ for (j=0; j< GTPIE_SIZE; j++) {
+ if ((ie[j] != 0) && (ie[j]->t == type)) {
+ if (instance-- == 0) return j;
+ }
+ }
+ return -1;
+}
+
+int gtpie_exist(union gtpie_member* ie[], int type, int instance) {
+ int j;
+ for (j=0; j< GTPIE_SIZE; j++) {
+ if ((ie[j] != 0) && (ie[j]->t == type)) {
+ if (instance-- == 0) return 1;
+ }
+ }
+ return 0;
+}
+
+int gtpie_gettlv(union gtpie_member* ie[], int type, int instance,
+ int *length, void *dst, int size){
+ int ien;
+ ien = gtpie_getie(ie, type, instance);
+ if (ien>=0) {
+ *length = ntoh16(ie[ien]->tlv.l);
+ if (*length <= size)
+ memcpy(dst, ie[ien]->tlv.v, *length);
+ else
+ return EOF;
+ }
+ return 0;
+}
+
+int gtpie_gettv0(union gtpie_member* ie[], int type, int instance,
+ void *dst, int size){
+ int ien;
+ ien = gtpie_getie(ie, type, instance);
+ if (ien>=0)
+ memcpy(dst, ie[ien]->tv0.v, size);
+ else
+ return EOF;
+ return 0;
+}
+
+int gtpie_gettv1(union gtpie_member* ie[], int type, int instance,
+ uint8_t *dst){
+ int ien;
+ ien = gtpie_getie(ie, type, instance);
+ if (ien>=0)
+ *dst = ntoh8(ie[ien]->tv1.v);
+ else
+ return EOF;
+ return 0;
+}
+
+int gtpie_gettv2(union gtpie_member* ie[], int type, int instance,
+ uint16_t *dst){
+ int ien;
+ ien = gtpie_getie(ie, type, instance);
+ if (ien>=0)
+ *dst = ntoh16(ie[ien]->tv2.v);
+ else
+ return EOF;
+ return 0;
+}
+
+int gtpie_gettv4(union gtpie_member* ie[], int type, int instance,
+ uint32_t *dst){
+ int ien;
+ ien = gtpie_getie(ie, type, instance);
+ if (ien>=0)
+ *dst = ntoh32(ie[ien]->tv4.v);
+ else
+ return EOF;
+ return 0;
+}
+
+int gtpie_decaps(union gtpie_member* ie[], void *pack, unsigned len) {
+ int i;
+ int j = 0;
+ unsigned char *p;
+ unsigned char *end;
+
+ end = (unsigned char*) pack + len;
+ p = pack;
+
+ memset(ie, 0, 4 * GTPIE_SIZE);
+
+ while (p<end) {
+ if (GTPIE_DEBUG) {
+ printf("The packet looks like this:\n");
+ for( i=0; i<(end-p); i++) {
+ printf("%02x ", (unsigned char)*(char *)(p+i));
+ if (!((i+1)%16)) printf("\n");
+ };
+ printf("\n");
+ }
+
+ switch (*p) {
+ case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */
+ case GTPIE_REORDER:
+ case GTPIE_MAP_CAUSE:
+ case GTPIE_MS_VALIDATED:
+ case GTPIE_RECOVERY:
+ case GTPIE_SELECTION_MODE:
+ case GTPIE_TEARDOWN:
+ case GTPIE_NSAPI:
+ case GTPIE_RANAP_CAUSE:
+ case GTPIE_RP_SMS:
+ case GTPIE_RP:
+ case GTPIE_MS_NOT_REACH:
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV1 found. Type %d, value %d\n",
+ ie[j]->tv1.t, ie[j]->tv1.v);
+ p+= 1 + 1;
+ j++;
+ }
+ break;
+ case GTPIE_FL_DI: /* TV GTPIE types with value length 2 */
+ case GTPIE_FL_C:
+ case GTPIE_PFI:
+ case GTPIE_CHARGING_C:
+ case GTPIE_TRACE_REF:
+ case GTPIE_TRACE_TYPE:
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV2 found. Type %d, value %d\n",
+ ie[j]->tv2.t, ie[j]->tv2.v);
+ p+= 1 + 2;
+ j++;
+ }
+ break;
+ case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */
+ case GTPIE_P_TMSI_S:
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV 3 found. Type %d, value %d, %d, %d\n",
+ ie[j]->tv0.t, ie[j]->tv0.v[0],
+ ie[j]->tv0.v[1], ie[j]->tv0.v[2]);
+ p+= 1 + 3;
+ j++;
+ }
+ break;
+ case GTPIE_TLLI: /* TV GTPIE types with value length 4 */
+ case GTPIE_P_TMSI:
+ case GTPIE_CHARGING_ID:
+ if (j<GTPIE_SIZE) {
+ /* case GTPIE_TEI_DI: gtp1 */
+ /* case GTPIE_TEI_C: gtp1 */
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV 4 found. Type %d, value %d\n",
+ ie[j]->tv4.t, ie[j]->tv4.v);
+ p+= 1 + 4;
+ j++;
+ }
+ break;
+ case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV 5 found. Type %d\n", ie[j]->tv0.t);
+ p+= 1 + 5;
+ j++;
+ }
+ break;
+ case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV 7 found. Type %d\n", ie[j]->tv0.t);
+ p+= 1 + 7;
+ j++;
+ }
+ break;
+ case GTPIE_IMSI: /* TV GTPIE types with value length 8 */
+ case GTPIE_RAI:
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV 8 found. Type %d, value 0x%llx\n",
+ ie[j]->tv0.t, ie[j]->tv8.v);
+ p+= 1 + 8;
+ j++;
+ }
+ break;
+ case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TV 28 found. Type %d\n", ie[j]->tv0.t);
+ p+= 1 + 28;
+ j++;
+ }
+ break;
+ case GTPIE_EXT_HEADER_T: /* GTP extension header */
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE GTP extension header found. Type %d\n",
+ ie[j]->ext.t);
+ p+= 2 + ntoh8(ie[j]->ext.l);
+ j++;
+ }
+ break;
+ case GTPIE_EUA: /* TLV GTPIE types with variable length */
+ case GTPIE_MM_CONTEXT:
+ case GTPIE_PDP_CONTEXT:
+ case GTPIE_APN:
+ case GTPIE_PCO:
+ case GTPIE_GSN_ADDR:
+ case GTPIE_MSISDN:
+ case GTPIE_QOS_PROFILE:
+ case GTPIE_AUTH_QUINTUP:
+ case GTPIE_TFT:
+ case GTPIE_TARGET_INF:
+ case GTPIE_UTRAN_TRANS:
+ case GTPIE_RAB_SETUP:
+ case GTPIE_TRIGGER_ID:
+ case GTPIE_OMC_ID:
+ case GTPIE_CHARGING_ADDR:
+ case GTPIE_PRIVATE:
+ if (j<GTPIE_SIZE) {
+ ie[j] = (union gtpie_member*) p;
+ if (GTPIE_DEBUG) printf("GTPIE TLV found. Type %d\n", ie[j]->tlv.t);
+ p+= 3 + ntoh16(ie[j]->tlv.l);
+ j++;
+ }
+ break;
+ default:
+ if (GTPIE_DEBUG) printf("GTPIE something unknown. Type %d\n", *p);
+ return EOF; /* We received something unknown */
+ }
+ }
+ if (p==end) {
+ if (GTPIE_DEBUG) printf("GTPIE normal return. %lx %lx\n",
+ (unsigned long) p, (unsigned long) end);
+ return 0; /* We landed at the end of the packet: OK */
+ }
+ else {
+ if (GTPIE_DEBUG) printf("GTPIE exceeded end of packet. %lx %lx\n",
+ (unsigned long) p, (unsigned long) end);
+ return EOF; /* We exceeded the end of the packet: Error */
+ }
+}
+
+int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len) {
+ int i;
+ unsigned char *p;
+ unsigned char *end;
+ union gtpie_member *m;
+ int iesize;
+
+ p = pack;
+
+ memset(pack, 0, GTPIE_MAX);
+ end = p + GTPIE_MAX;
+ for (i=1; i<GTPIE_SIZE; i++) if (ie[i] != 0) {
+ if (GTPIE_DEBUG) printf("gtpie_encaps. Type %d\n", i);
+ m=(union gtpie_member *)p;
+ switch (i) {
+ case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */
+ case GTPIE_REORDER:
+ case GTPIE_MAP_CAUSE:
+ case GTPIE_MS_VALIDATED:
+ case GTPIE_RECOVERY:
+ case GTPIE_SELECTION_MODE:
+ case GTPIE_TEARDOWN:
+ case GTPIE_NSAPI:
+ case GTPIE_RANAP_CAUSE:
+ case GTPIE_RP_SMS:
+ case GTPIE_RP:
+ case GTPIE_MS_NOT_REACH:
+ iesize = 2;
+ break;
+ case GTPIE_FL_DI: /* TV GTPIE types with value length 2 */
+ case GTPIE_FL_C:
+ case GTPIE_PFI:
+ case GTPIE_CHARGING_C:
+ case GTPIE_TRACE_REF:
+ case GTPIE_TRACE_TYPE:
+ iesize = 3;
+ break;
+ case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */
+ case GTPIE_P_TMSI_S:
+ iesize = 4;
+ break;
+ case GTPIE_TLLI: /* TV GTPIE types with value length 4 */
+ case GTPIE_P_TMSI:
+ /* case GTPIE_TEI_DI: only in gtp1*/
+ /* case GTPIE_TEI_C: only in gtp1*/
+ case GTPIE_CHARGING_ID:
+ iesize = 5;
+ break;
+ case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */
+ iesize = 6;
+ break;
+ case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */
+ iesize = 8;
+ break;
+ case GTPIE_IMSI: /* TV GTPIE types with value length 8 */
+ case GTPIE_RAI:
+ iesize = 9;
+ break;
+ case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */
+ iesize = 29;
+ break;
+ case GTPIE_EXT_HEADER_T: /* GTP extension header */
+ iesize = 2 + hton8(ie[i]->ext.l);
+ break;
+ case GTPIE_EUA: /* TLV GTPIE types with length length 2 */
+ case GTPIE_MM_CONTEXT:
+ case GTPIE_PDP_CONTEXT:
+ case GTPIE_APN:
+ case GTPIE_PCO:
+ case GTPIE_GSN_ADDR:
+ case GTPIE_MSISDN:
+ case GTPIE_QOS_PROFILE:
+ case GTPIE_AUTH_QUINTUP:
+ case GTPIE_TFT:
+ case GTPIE_TARGET_INF:
+ case GTPIE_UTRAN_TRANS:
+ case GTPIE_RAB_SETUP:
+ case GTPIE_TRIGGER_ID:
+ case GTPIE_OMC_ID:
+ case GTPIE_CHARGING_ADDR:
+ case GTPIE_PRIVATE:
+ iesize = 3 + hton16(ie[i]->tlv.l);
+ break;
+ default:
+ return 2; /* We received something unknown */
+ }
+ if (p+iesize < end) {
+ memcpy(p, ie[i], iesize);
+ p += iesize;
+ *len += iesize;
+ }
+ else return 2; /* Out of space */
+ }
+ return 0;
+}
+
+int gtpie_encaps2(union gtpie_member ie[], int size,
+ void *pack, unsigned *len) {
+ int i, j;
+ unsigned char *p;
+ unsigned char *end;
+ union gtpie_member *m;
+ int iesize;
+
+ p = pack;
+
+ memset(pack, 0, GTPIE_MAX);
+ end = p + GTPIE_MAX;
+ for (j=0; j<GTPIE_SIZE; j++) for (i=0; i<size; i++) if (ie[i].t == j) {
+ if (GTPIE_DEBUG) printf("gtpie_encaps. Number %d, Type %d\n", i, ie[i].t);
+ m=(union gtpie_member *)p;
+ switch (ie[i].t) {
+ case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */
+ case GTPIE_REORDER:
+ case GTPIE_MAP_CAUSE:
+ case GTPIE_MS_VALIDATED:
+ case GTPIE_RECOVERY:
+ case GTPIE_SELECTION_MODE:
+ case GTPIE_TEARDOWN:
+ case GTPIE_NSAPI:
+ case GTPIE_RANAP_CAUSE:
+ case GTPIE_RP_SMS:
+ case GTPIE_RP:
+ case GTPIE_MS_NOT_REACH:
+ iesize = 2;
+ break;
+ case GTPIE_PFI: /* TV GTPIE types with value length 2 */
+ case GTPIE_CHARGING_C:
+ case GTPIE_TRACE_REF:
+ case GTPIE_TRACE_TYPE:
+ iesize = 3;
+ break;
+ case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */
+ case GTPIE_P_TMSI_S:
+ iesize = 4;
+ break;
+ case GTPIE_TLLI: /* TV GTPIE types with value length 4 */
+ case GTPIE_P_TMSI:
+ case GTPIE_TEI_DI:
+ case GTPIE_TEI_C:
+ iesize = 5;
+ break;
+ case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */
+ iesize = 6;
+ break;
+ case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */
+ iesize = 8;
+ break;
+ case GTPIE_IMSI: /* TV GTPIE types with value length 8 */
+ case GTPIE_RAI:
+ iesize = 9;
+ break;
+ case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */
+ iesize = 29;
+ break;
+ case GTPIE_EXT_HEADER_T: /* GTP extension header */
+ iesize = 2 + hton8(ie[i].ext.l);
+ break;
+ case GTPIE_CHARGING_ID: /* TLV GTPIE types with length length 2 */
+ case GTPIE_EUA:
+ case GTPIE_MM_CONTEXT:
+ case GTPIE_PDP_CONTEXT:
+ case GTPIE_APN:
+ case GTPIE_PCO:
+ case GTPIE_GSN_ADDR:
+ case GTPIE_MSISDN:
+ case GTPIE_QOS_PROFILE:
+ case GTPIE_AUTH_QUINTUP:
+ case GTPIE_TFT:
+ case GTPIE_TARGET_INF:
+ case GTPIE_UTRAN_TRANS:
+ case GTPIE_RAB_SETUP:
+ case GTPIE_TRIGGER_ID:
+ case GTPIE_OMC_ID:
+ case GTPIE_CHARGING_ADDR:
+ case GTPIE_PRIVATE:
+ iesize = 3 + hton16(ie[i].tlv.l);
+ break;
+ default:
+ return 2; /* We received something unknown */
+ }
+ if (p+iesize < end) {
+ memcpy(p, &ie[i], iesize);
+ p += iesize;
+ *len += iesize;
+ }
+ else return 2; /* Out of space */
+ }
+ return 0;
+}
diff --git a/gtp/gtpie.h b/gtp/gtpie.h
new file mode 100644
index 0000000..3a798ae
--- /dev/null
+++ b/gtp/gtpie.h
@@ -0,0 +1,279 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+#ifndef _GTPIE_H
+#define _GTPIE_H
+
+/* Macroes for conversion between host and network byte order */
+#define hton8(x) (x)
+#define ntoh8(x) (x)
+#define hton16(x) htons(x)
+#define ntoh16(x) ntohs(x)
+#define hton32(x) htonl(x)
+#define ntoh32(x) ntohl(x)
+
+#define GTPIE_SIZE 256 /* Max number of information elements */
+#define GTPIE_MAX 0xffff /* Max length of information elements */
+#define GTPIE_MAX_TV 28 /* Max length of type value pair */
+#define GTPIE_MAX_TLV 0xffff-3 /* Max length of TLV (GTP length is 16 bit) */
+
+#define GTPIE_DEBUG 0 /* Print debug information */
+
+/* GTP Information elements from 29.060 v3.9.0 7.7 Information Elements */
+/* Also covers version 0. Note that version 0 6: QOS Profile was superceded *
+ * by 135: QOS Profile in version 1 */
+
+#define GTPIE_CAUSE 1 /* Cause 1 */
+#define GTPIE_IMSI 2 /* International Mobile Subscriber Identity 8 */
+#define GTPIE_RAI 3 /* Routing Area Identity (RAI) 8 */
+#define GTPIE_TLLI 4 /* Temporary Logical Link Identity (TLLI) 4 */
+#define GTPIE_P_TMSI 5 /* Packet TMSI (P-TMSI) 4 */
+#define GTPIE_QOS_PROFILE0 6 /* Quality of Service Profile GTP version 0 3*/
+ /* 6-7 SPARE */ /* 6 is QoS Profile vers 0 */
+#define GTPIE_REORDER 8 /* Reordering Required 1 */
+#define GTPIE_AUTH_TRIPLET 9 /* Authentication Triplet 28 */
+ /* 10 SPARE */
+#define GTPIE_MAP_CAUSE 11 /* MAP Cause 1 */
+#define GTPIE_P_TMSI_S 12 /* P-TMSI Signature 3 */
+#define GTPIE_MS_VALIDATED 13 /* MS Validated 1 */
+#define GTPIE_RECOVERY 14 /* Recovery 1 */
+#define GTPIE_SELECTION_MODE 15 /* Selection Mode 1 */
+#define GTPIE_FL_DI 16 /* Flow Label Data I 2 */
+#define GTPIE_TEI_DI 16 /* Tunnel Endpoint Identifier Data I 4 */
+#define GTPIE_TEI_C 17 /* Tunnel Endpoint Identifier Control Plane 4 */
+#define GTPIE_FL_C 17 /* Flow Label Signalling 2 */
+#define GTPIE_TEI_DII 18 /* Tunnel Endpoint Identifier Data II 5 */
+#define GTPIE_TEARDOWN 19 /* Teardown Ind 1 */
+#define GTPIE_NSAPI 20 /* NSAPI 1 */
+#define GTPIE_RANAP_CAUSE 21 /* RANAP Cause 1 */
+#define GTPIE_RAB_CONTEXT 22 /* RAB Context 7 */
+#define GTPIE_RP_SMS 23 /* Radio Priority SMS 1 */
+#define GTPIE_RP 24 /* Radio Priority 1 */
+#define GTPIE_PFI 25 /* Packet Flow Id 2 */
+#define GTPIE_CHARGING_C 26 /* Charging Characteristics 2 */
+#define GTPIE_TRACE_REF 27 /* Trace Reference 2 */
+#define GTPIE_TRACE_TYPE 28 /* Trace Type 2 */
+#define GTPIE_MS_NOT_REACH 29 /* MS Not Reachable Reason 1 */
+ /* 30-116 UNUSED */
+/* 117-126 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15) */
+#define GTPIE_CHARGING_ID 127 /* Charging ID 4 */
+#define GTPIE_EUA 128 /* End User Address */
+#define GTPIE_MM_CONTEXT 129 /* MM Context */
+#define GTPIE_PDP_CONTEXT 130 /* PDP Context */
+#define GTPIE_APN 131 /* Access Point Name */
+#define GTPIE_PCO 132 /* Protocol Configuration Options */
+#define GTPIE_GSN_ADDR 133 /* GSN Address */
+#define GTPIE_MSISDN 134 /* MS International PSTN/ISDN Number */
+#define GTPIE_QOS_PROFILE 135 /* Quality of Service Profile */
+#define GTPIE_AUTH_QUINTUP 136 /* Authentication Quintuplet */
+#define GTPIE_TFT 137 /* Traffic Flow Template */
+#define GTPIE_TARGET_INF 138 /* Target Identification */
+#define GTPIE_UTRAN_TRANS 139 /* UTRAN Transparent Container */
+#define GTPIE_RAB_SETUP 140 /* RAB Setup Information */
+#define GTPIE_EXT_HEADER_T 141 /* Extension Header Type List */
+#define GTPIE_TRIGGER_ID 142 /* Trigger Id */
+#define GTPIE_OMC_ID 143 /* OMC Identity */
+/* 239-250 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15) */
+#define GTPIE_CHARGING_ADDR 251 /* Charging Gateway Address */
+/* 252-254 Reserved for the GPRS charging protocol (see GTP' in GSM 12.15) */
+#define GTPIE_PRIVATE 255 /* Private Extension */
+
+/* GTP information element cause codes from 29.060 v3.9.0 7.7 */
+/* */
+#define GTPCAUSE_REQ_IMSI 0 /* Request IMSI */
+#define GTPCAUSE_REQ_IMEI 1 /* Request IMEI */
+#define GTPCAUSE_REQ_IMSI_IMEI 2 /* Request IMSI and IMEI */
+#define GTPCAUSE_NO_ID_NEEDED 3 /* No identity needed */
+#define GTPCAUSE_MS_REFUSES 4 /* MS refuses */
+#define GTPCAUSE_MS_NOT_RESP 5 /* MS is not GPRS responding */
+#define GTPCAUSE_006 6 /* For future use 6-48 */
+#define GTPCAUSE_049 49 /* Cause values reserved for GPRS charging protocol use (See GTP' in GSM 12.15) 49-63 */
+#define GTPCAUSE_064 64 /* For future use 64-127 */
+#define GTPCAUSE_ACC_REQ 128 /* Request accepted */
+#define GTPCAUSE_129 129 /* For future use 129-176 */
+#define GTPCAUSE_177 177 /* Cause values reserved for GPRS charging protocol use (See GTP' In GSM 12.15) 177-191 */
+#define GTPCAUSE_NON_EXIST 192 /* Non-existent */
+#define GTPCAUSE_INVALID_MESSAGE 193 /* Invalid message format */
+#define GTPCAUSE_IMSI_NOT_KNOWN 194 /* IMSI not known */
+#define GTPCAUSE_MS_DETACHED 195 /* MS is GPRS detached */
+#define GTPCAUSE_MS_NOT_RESP 196 /* MS is not GPRS responding */
+#define GTPCAUSE_MS_REFUSES 197 /* MS refuses */
+#define GTPCAUSE_198 198 /* For future use */
+#define GTPCAUSE_NO_RESOURCES 199 /* No resources available */
+#define GTPCAUSE_NOT_SUPPORTED 200 /* Service not supported */
+#define GTPCAUSE_MAN_IE_INCORRECT 201 /* Mandatory IE incorrect */
+#define GTPCAUSE_MAN_IE_MISSING 202 /* Mandatory IE missing */
+#define GTPCAUSE_OPT_IE_INCORRECT 203 /* Optional IE incorrect */
+#define GTPCAUSE_SYS_FAIL 204 /* System failure */
+#define GTPCAUSE_ROAMING_REST 205 /* Roaming Restriction */
+#define GTPCAUSE_PTIMSI_MISMATCH 206 /* P-TMSI signature mismatch */
+#define GTPCAUSE_CONN_SUSP 207 /* GPRS connection suspended */
+#define GTPCAUSE_AUTH_FAIL 208 /* Authentication failure */
+#define GTPCAUSE_USER_AUTH_FAIL 209 /* User authentication failed */
+#define GTPCAUSE_CONTEXT_NOT_FOUND 210 /* Context not found */
+#define GTPCAUSE_ADDR_OCCUPIED 211 /* All dynamic PDP addresses are occupied */
+#define GTPCAUSE_NO_MEMORY 212 /* No memory is available */
+#define GTPCAUSE_RELOC_FAIL 213 /* Relocation failure */
+#define GTPCAUSE_UNKNOWN_MAN_EXTHEADER 214 /* Unknown mandatory extension header */
+#define GTPCAUSE_SEM_ERR_TFT 215 /* Semantic error in the TFT operation */
+#define GTPCAUSE_SYN_ERR_TFT 216 /* Syntactic error in the TFT operation */
+#define GTPCAUSE_SEM_ERR_FILTER 217 /* Semantic errors in packet filter(s) */
+#define GTPCAUSE_SYN_ERR_FILTER 218 /* Syntactic errors in packet filter(s) */
+#define GTPCAUSE_MISSING_APN 219 /* Missing or unknown APN*/
+#define GTPCAUSE_UNKNOWN_PDP 220 /* Unknown PDP address or PDP type */
+#define GTPCAUSE_221 221 /* For Future Use 221-240 */
+#define GTPCAUSE_241 241 /* Cause Values Reserved For Gprs Charging Protocol Use (See Gtp' In Gsm 12.15) 241-255 */
+
+
+/* GTP information element structs in network order */
+struct gtpie_ext { /* Extension header */
+ u_int8_t t; /* Type */
+ u_int8_t l; /* Length */
+ u_int8_t *p; /* Value */
+} __attribute__((packed));
+
+struct gtpie_tlv { /* Type length value pair */
+ u_int8_t t; /* Type */
+ u_int16_t l; /* Length */
+ u_int8_t v[GTPIE_MAX_TLV]; /* Value */
+} __attribute__((packed));
+
+struct gtpie_tv0 { /* 1 byte type value pair */
+ u_int8_t t; /* Type */
+ u_int8_t v[GTPIE_MAX_TV]; /* Pointer to value */
+}__attribute__((packed));
+
+struct gtpie_tv1 { /* 1 byte type value pair */
+ u_int8_t t; /* Type */
+ u_int8_t v; /* Value */
+}__attribute__((packed));
+
+struct gtpie_tv2 { /* 2 byte type value pair */
+ u_int8_t t; /* Type */
+ u_int16_t v; /* Value */
+}__attribute__((packed));
+
+struct gtpie_tv4 { /* 4 byte type value pair */
+ u_int8_t t; /* Type */
+ u_int32_t v; /* Value */
+}__attribute__((packed));
+
+struct gtpie_tv8 { /* 8 byte type value pair */
+ u_int8_t t; /* Type */
+ u_int64_t v; /* Value */
+}__attribute__((packed));
+
+
+union gtpie_member {
+ u_int8_t t;
+ struct gtpie_ext ext;
+ struct gtpie_tlv tlv;
+ struct gtpie_tv0 tv0;
+ struct gtpie_tv1 tv1;
+ struct gtpie_tv2 tv2;
+ struct gtpie_tv4 tv4;
+ struct gtpie_tv8 tv8;
+}__attribute__((packed));
+
+/*
+cause
+imsi
+rai
+tlli
+p_tmsi
+qos_profile0
+reorder
+auth
+map_cause
+p_tmsi_s
+ms_validated
+recovery
+selection_mode
+tei_di
+tei_c
+tei_dii
+teardown
+nsapi
+ranap_cause
+rab_context
+rp_sms
+rp
+pfi
+charging_c
+trace_ref
+trace_type
+ms_not_reach
+charging_id
+eua
+mm_context
+pdp_context
+apn
+pco
+gsn_addr
+msisdn
+qos_profile
+auth
+tft
+target_inf
+utran_trans
+rab_setup
+ext_header_t
+trigger_id
+omc_id
+charging_addr
+private
+*/
+
+struct tlv1 {
+ u_int8_t type;
+ u_int8_t length;
+}__attribute__((packed));
+
+struct tlv2 {
+ u_int8_t type;
+ u_int16_t length;
+}__attribute__((packed));
+
+extern int gtpie_tlv(void *p, int *length, int size,
+ u_int8_t t, int l, void *v);
+extern int gtpie_tv0(void *p, int *length, int size,
+ u_int8_t t, int l, u_int8_t *v);
+extern int gtpie_tv1(void *p, int *length, int size, u_int8_t t, u_int8_t v);
+extern int gtpie_tv2(void *p, int *length, int size, u_int8_t t, u_int16_t v);
+extern int gtpie_tv4(void *p, int *length, int size, u_int8_t t, u_int32_t v);
+extern int gtpie_tv8(void *p, int *length, int size, u_int8_t t, u_int64_t v);
+extern int gtpie_getie(union gtpie_member* ie[], int type, int instance);
+extern int gtpie_exist(union gtpie_member* ie[], int type, int instance);
+extern int gtpie_gettlv(union gtpie_member* ie[], int type, int instance,
+ int *length, void *dst, int size);
+extern int gtpie_gettv0(union gtpie_member* ie[], int type, int instance,
+ void *dst, int size);
+extern int gtpie_gettv1(union gtpie_member* ie[], int type, int instance,
+ uint8_t *dst);
+extern int gtpie_gettv2(union gtpie_member* ie[], int type, int instance,
+ uint16_t *dst);
+extern int gtpie_gettv4(union gtpie_member* ie[], int type, int instance,
+ uint32_t *dst);
+
+extern int gtpie_decaps(union gtpie_member* ie[], void *pack, unsigned len);
+extern int gtpie_encaps(union gtpie_member* ie[], void *pack, unsigned *len);
+extern int gtpie_encaps2(union gtpie_member ie[], int size,
+ void *pack, unsigned *len);
+
+
+#endif /* !_GTPIE_H */
+
+
diff --git a/gtp/lookupa.c b/gtp/lookupa.c
new file mode 100644
index 0000000..8ff114b
--- /dev/null
+++ b/gtp/lookupa.c
@@ -0,0 +1,246 @@
+/*
+--------------------------------------------------------------------
+lookupa.c, by Bob Jenkins, December 1996. Same as lookup2.c
+Use this code however you wish. Public Domain. No warranty.
+Source is http://burtleburtle.net/bob/c/lookupa.c
+--------------------------------------------------------------------
+*/
+#ifndef STANDARD
+/*
+#include "standard.h"
+*/
+#endif
+#ifndef LOOKUPA
+#include "lookupa.h"
+#endif
+
+/*
+--------------------------------------------------------------------
+mix -- mix 3 32-bit values reversibly.
+For every delta with one or two bit set, and the deltas of all three
+ high bits or all three low bits, whether the original value of a,b,c
+ is almost all zero or is uniformly distributed,
+* If mix() is run forward or backward, at least 32 bits in a,b,c
+ have at least 1/4 probability of changing.
+* If mix() is run forward, every bit of c will change between 1/3 and
+ 2/3 of the time. (Well, 22/100 and 78/100 for some 2-bit deltas.)
+mix() was built out of 36 single-cycle latency instructions in a
+ structure that could supported 2x parallelism, like so:
+ a -= b;
+ a -= c; x = (c>>13);
+ b -= c; a ^= x;
+ b -= a; x = (a<<8);
+ c -= a; b ^= x;
+ c -= b; x = (b>>13);
+ ...
+ Unfortunately, superscalar Pentiums and Sparcs can't take advantage
+ of that parallelism. They've also turned some of those single-cycle
+ latency instructions into multi-cycle latency instructions. Still,
+ this is the fastest good hash I could find. There were about 2^^68
+ to choose from. I only looked at a billion or so.
+--------------------------------------------------------------------
+*/
+#define mix(a,b,c) \
+{ \
+ a -= b; a -= c; a ^= (c>>13); \
+ b -= c; b -= a; b ^= (a<<8); \
+ c -= a; c -= b; c ^= (b>>13); \
+ a -= b; a -= c; a ^= (c>>12); \
+ b -= c; b -= a; b ^= (a<<16); \
+ c -= a; c -= b; c ^= (b>>5); \
+ a -= b; a -= c; a ^= (c>>3); \
+ b -= c; b -= a; b ^= (a<<10); \
+ c -= a; c -= b; c ^= (b>>15); \
+}
+
+/*
+--------------------------------------------------------------------
+lookup() -- hash a variable-length key into a 32-bit value
+ k : the key (the unaligned variable-length array of bytes)
+ len : the length of the key, counting by bytes
+ level : can be any 4-byte value
+Returns a 32-bit value. Every bit of the key affects every bit of
+the return value. Every 1-bit and 2-bit delta achieves avalanche.
+About 6len+35 instructions.
+
+The best hash table sizes are powers of 2. There is no need to do
+mod a prime (mod is sooo slow!). If you need less than 32 bits,
+use a bitmask. For example, if you need only 10 bits, do
+ h = (h & hashmask(10));
+In which case, the hash table should have hashsize(10) elements.
+
+If you are hashing n strings (ub1 **)k, do it like this:
+ for (i=0, h=0; i<n; ++i) h = lookup( k[i], len[i], h);
+
+By Bob Jenkins, 1996. bob_jenkins@burtleburtle.net. You may use this
+code any way you wish, private, educational, or commercial.
+
+See http://burtleburtle.net/bob/hash/evahash.html
+Use for hash table lookup, or anything where one collision in 2^32 is
+acceptable. Do NOT use for cryptographic purposes.
+--------------------------------------------------------------------
+*/
+
+ub4 lookup( k, length, level)
+register ub1 *k; /* the key */
+register ub4 length; /* the length of the key */
+register ub4 level; /* the previous hash, or an arbitrary value */
+{
+ register ub4 a,b,c,len;
+
+ /* Set up the internal state */
+ len = length;
+ a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */
+ c = level; /* the previous hash value */
+
+ /*---------------------------------------- handle most of the key */
+ while (len >= 12)
+ {
+ a += (k[0] +((ub4)k[1]<<8) +((ub4)k[2]<<16) +((ub4)k[3]<<24));
+ b += (k[4] +((ub4)k[5]<<8) +((ub4)k[6]<<16) +((ub4)k[7]<<24));
+ c += (k[8] +((ub4)k[9]<<8) +((ub4)k[10]<<16)+((ub4)k[11]<<24));
+ mix(a,b,c);
+ k += 12; len -= 12;
+ }
+
+ /*------------------------------------- handle the last 11 bytes */
+ c += length;
+ switch(len) /* all the case statements fall through */
+ {
+ case 11: c+=((ub4)k[10]<<24);
+ case 10: c+=((ub4)k[9]<<16);
+ case 9 : c+=((ub4)k[8]<<8);
+ /* the first byte of c is reserved for the length */
+ case 8 : b+=((ub4)k[7]<<24);
+ case 7 : b+=((ub4)k[6]<<16);
+ case 6 : b+=((ub4)k[5]<<8);
+ case 5 : b+=k[4];
+ case 4 : a+=((ub4)k[3]<<24);
+ case 3 : a+=((ub4)k[2]<<16);
+ case 2 : a+=((ub4)k[1]<<8);
+ case 1 : a+=k[0];
+ /* case 0: nothing left to add */
+ }
+ mix(a,b,c);
+ /*-------------------------------------------- report the result */
+ return c;
+}
+
+
+/*
+--------------------------------------------------------------------
+mixc -- mixc 8 4-bit values as quickly and thoroughly as possible.
+Repeating mix() three times achieves avalanche.
+Repeating mix() four times eliminates all funnels and all
+ characteristics stronger than 2^{-11}.
+--------------------------------------------------------------------
+*/
+#define mixc(a,b,c,d,e,f,g,h) \
+{ \
+ a^=b<<11; d+=a; b+=c; \
+ b^=c>>2; e+=b; c+=d; \
+ c^=d<<8; f+=c; d+=e; \
+ d^=e>>16; g+=d; e+=f; \
+ e^=f<<10; h+=e; f+=g; \
+ f^=g>>4; a+=f; g+=h; \
+ g^=h<<8; b+=g; h+=a; \
+ h^=a>>9; c+=h; a+=b; \
+}
+
+/*
+--------------------------------------------------------------------
+checksum() -- hash a variable-length key into a 256-bit value
+ k : the key (the unaligned variable-length array of bytes)
+ len : the length of the key, counting by bytes
+ state : an array of CHECKSTATE 4-byte values (256 bits)
+The state is the checksum. Every bit of the key affects every bit of
+the state. There are no funnels. About 112+6.875len instructions.
+
+If you are hashing n strings (ub1 **)k, do it like this:
+ for (i=0; i<8; ++i) state[i] = 0x9e3779b9;
+ for (i=0, h=0; i<n; ++i) checksum( k[i], len[i], state);
+
+(c) Bob Jenkins, 1996. bob_jenkins@burtleburtle.net. You may use this
+code any way you wish, private, educational, or commercial, as long
+as this whole comment accompanies it.
+
+See http://burtleburtle.net/bob/hash/evahash.html
+Use to detect changes between revisions of documents, assuming nobody
+is trying to cause collisions. Do NOT use for cryptography.
+--------------------------------------------------------------------
+*/
+void checksum( k, len, state)
+register ub1 *k;
+register ub4 len;
+register ub4 *state;
+{
+ register ub4 a,b,c,d,e,f,g,h,length;
+
+ /* Use the length and level; add in the golden ratio. */
+ length = len;
+ a=state[0]; b=state[1]; c=state[2]; d=state[3];
+ e=state[4]; f=state[5]; g=state[6]; h=state[7];
+
+ /*---------------------------------------- handle most of the key */
+ while (len >= 32)
+ {
+ a += (k[0] +(k[1]<<8) +(k[2]<<16) +(k[3]<<24));
+ b += (k[4] +(k[5]<<8) +(k[6]<<16) +(k[7]<<24));
+ c += (k[8] +(k[9]<<8) +(k[10]<<16)+(k[11]<<24));
+ d += (k[12]+(k[13]<<8)+(k[14]<<16)+(k[15]<<24));
+ e += (k[16]+(k[17]<<8)+(k[18]<<16)+(k[19]<<24));
+ f += (k[20]+(k[21]<<8)+(k[22]<<16)+(k[23]<<24));
+ g += (k[24]+(k[25]<<8)+(k[26]<<16)+(k[27]<<24));
+ h += (k[28]+(k[29]<<8)+(k[30]<<16)+(k[31]<<24));
+ mixc(a,b,c,d,e,f,g,h);
+ mixc(a,b,c,d,e,f,g,h);
+ mixc(a,b,c,d,e,f,g,h);
+ mixc(a,b,c,d,e,f,g,h);
+ k += 32; len -= 32;
+ }
+
+ /*------------------------------------- handle the last 31 bytes */
+ h += length;
+ switch(len)
+ {
+ case 31: h+=(k[30]<<24);
+ case 30: h+=(k[29]<<16);
+ case 29: h+=(k[28]<<8);
+ case 28: g+=(k[27]<<24);
+ case 27: g+=(k[26]<<16);
+ case 26: g+=(k[25]<<8);
+ case 25: g+=k[24];
+ case 24: f+=(k[23]<<24);
+ case 23: f+=(k[22]<<16);
+ case 22: f+=(k[21]<<8);
+ case 21: f+=k[20];
+ case 20: e+=(k[19]<<24);
+ case 19: e+=(k[18]<<16);
+ case 18: e+=(k[17]<<8);
+ case 17: e+=k[16];
+ case 16: d+=(k[15]<<24);
+ case 15: d+=(k[14]<<16);
+ case 14: d+=(k[13]<<8);
+ case 13: d+=k[12];
+ case 12: c+=(k[11]<<24);
+ case 11: c+=(k[10]<<16);
+ case 10: c+=(k[9]<<8);
+ case 9 : c+=k[8];
+ case 8 : b+=(k[7]<<24);
+ case 7 : b+=(k[6]<<16);
+ case 6 : b+=(k[5]<<8);
+ case 5 : b+=k[4];
+ case 4 : a+=(k[3]<<24);
+ case 3 : a+=(k[2]<<16);
+ case 2 : a+=(k[1]<<8);
+ case 1 : a+=k[0];
+ }
+ mixc(a,b,c,d,e,f,g,h);
+ mixc(a,b,c,d,e,f,g,h);
+ mixc(a,b,c,d,e,f,g,h);
+ mixc(a,b,c,d,e,f,g,h);
+
+ /*-------------------------------------------- report the result */
+ state[0]=a; state[1]=b; state[2]=c; state[3]=d;
+ state[4]=e; state[5]=f; state[6]=g; state[7]=h;
+}
diff --git a/gtp/lookupa.h b/gtp/lookupa.h
new file mode 100644
index 0000000..16784a9
--- /dev/null
+++ b/gtp/lookupa.h
@@ -0,0 +1,29 @@
+/*
+------------------------------------------------------------------------------
+By Bob Jenkins, September 1996.
+lookupa.h, a hash function for table lookup, same function as lookup.c.
+Use this code in any way you wish. Public Domain. It has no warranty.
+Source is http://burtleburtle.net/bob/c/lookupa.h
+------------------------------------------------------------------------------
+*/
+
+/* Uncommented by Jens Jakobsen 20020717
+#ifndef STANDARD
+#include "standard.h"
+#endif
+*/
+
+#ifndef LOOKUPA
+#define LOOKUPA
+
+typedef unsigned long int ub4; /* unsigned 4-byte quantities */
+typedef unsigned char ub1;
+
+#define CHECKSTATE 8
+#define hashsize(n) ((ub4)1<<(n))
+#define hashmask(n) (hashsize(n)-1)
+
+ub4 lookup(/*_ ub1 *k, ub4 length, ub4 level _*/);
+void checksum(/*_ ub1 *k, ub4 length, ub4 *state _*/);
+
+#endif /* LOOKUPA */
diff --git a/gtp/pdp.c b/gtp/pdp.c
new file mode 100644
index 0000000..3e5951e
--- /dev/null
+++ b/gtp/pdp.c
@@ -0,0 +1,320 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+/*
+ * pdp.c:
+ *
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <string.h>
+#include "pdp.h"
+#include "lookupa.h"
+
+/* ***********************************************************
+ * Global variables TODO: most should be moved to gsn_t
+ *************************************************************/
+
+struct pdp_t pdpa[PDP_MAX]; /* PDP storage */
+struct pdp_t* hashtid[PDP_MAX];/* Hash table for IMSI + NSAPI */
+struct pdp_t* haship[PDP_MAX]; /* Hash table for IP and network interface */
+
+/* ***********************************************************
+ * Functions related to PDP storage
+ *
+ * Lifecycle
+ * For a GGSN pdp context life begins with the reception of a
+ * create pdp context request. It normally ends with the reception
+ * of a delete pdp context request, but will also end with the
+ * reception of an error indication message.
+ * Provisions should probably be made for terminating pdp contexts
+ * based on either idle timeout, or by sending downlink probe
+ * messages (ping?) to see if the MS is still responding.
+ *
+ * For an SGSN pdp context life begins with the application just
+ * before sending off a create pdp context request. It normally
+ * ends when a delete pdp context response message is received
+ * from the GGSN, but should also end when with the reception of
+ * an error indication message.
+ *
+ *
+ * HASH Tables
+ *
+ * Downlink packets received in the GGSN are identified only by their
+ * network interface together with their destination IP address (Two
+ * network interfaces can use the same private IP address). Each IMSI
+ * (mobile station) can have several PDP contexts using the same IP
+ * address. In this case the traffic flow template (TFT) is used to
+ * determine the correct PDP context for a particular IMSI. Also it
+ * should be possible for each PDP context to use several IP adresses
+ * For fixed wireless access a mobile station might need a full class
+ * C network. Even in the case of several IP adresses the PDP context
+ * should be determined on the basis of the network IP address.
+ * Thus we need a hash table based on network interface + IP address.
+ *
+ * Uplink packets are for GTP0 identified by their IMSI and NSAPI, which
+ * is collectively called the tunnel identifier. There is also a 16 bit
+ * flow label that can be used for identification of uplink packets. This
+ * however is quite useless as it limits the number of contexts to 65536.
+ * For GTP1 uplink packets are identified by a Tunnel Endpoint Identifier
+ * (32 bit), or in some cases by the combination of IMSI and NSAPI.
+ * For GTP1 delete context requests there is a need to find the PDP
+ * contexts with the same IP address. This however can be done by using
+ * the IP hash table.
+ * Thus we need a hash table based on TID (IMSI and NSAPI). The TEID will
+ * be used for directly addressing the PDP context.
+
+ * pdp_newpdp
+ * Gives you a pdp context with no hash references In some way
+ * this should have a limited lifetime.
+ *
+ * pdp_freepdp
+ * Frees a context that was previously allocated with
+ * pdp_newpdp
+ *
+ *
+ * pdp_getpdpIP
+ * An incoming IP packet is uniquely identified by a pointer
+ * to a network connection (void *) and an IP address
+ * (struct in_addr)
+ *
+ * pdp_getpdpGTP
+ * An incoming GTP packet is uniquely identified by a the
+ * TID (imsi + nsapi (8 octets)) in or by the Flow Label
+ * (2 octets) in gtp0 or by the Tunnel Endpoint Identifier
+ * (4 octets) in gtp1.
+ *
+ * This leads to an architecture where the receiving GSN
+ * chooses a Flow Label or a Tunnel Endpoint Identifier
+ * when the connection is setup.
+ * Thus no hash table is needed for GTP lookups.
+ *
+ *************************************************************/
+
+int pdp_init() {
+ memset(&pdpa, 0, sizeof(pdpa));
+ memset(&hashtid, 0, sizeof(hashtid));
+ memset(&haship, 0, sizeof(haship));
+
+ return 0;
+}
+
+int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
+ struct pdp_t *pdp_old){
+ int n;
+ for (n=0; n<PDP_MAX; n++) { /* TODO: Need to do better than linear search */
+ if (pdpa[n].inuse == 0) {
+ *pdp = &pdpa[n];
+ if (NULL != pdp_old) memcpy(*pdp, pdp_old, sizeof(struct pdp_t));
+ else memset(*pdp, 0, sizeof(struct pdp_t));
+ (*pdp)->inuse = 1;
+ (*pdp)->imsi = imsi;
+ (*pdp)->nsapi = nsapi;
+ (*pdp)->fllc = (uint16_t) n;
+ (*pdp)->fllu = (uint16_t) n;
+ (*pdp)->teic_own = (uint32_t) n;
+ (*pdp)->teic_own = (uint32_t) n;
+ pdp_tidset(*pdp, pdp_gettid(imsi, nsapi));
+ return 0;
+ }
+ }
+ return EOF; /* No more available */
+}
+
+int pdp_freepdp(struct pdp_t *pdp){
+ pdp_tiddel(pdp);
+ memset(pdp, 0, sizeof(struct pdp_t));
+ /* Also need to clean up IP hash tables */
+ return 0;
+}
+
+int pdp_getpdp(struct pdp_t **pdp){
+ *pdp = &pdpa[0];
+ return 0;
+}
+
+int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl){
+ if (fl>=PDP_MAX) {
+ return EOF; /* Not found */
+ }
+ else {
+ *pdp = &pdpa[fl];
+ if ((*pdp)->inuse) return 0;
+ else return EOF;
+ /* Context exists. We do no further validity checking. */
+ }
+}
+
+int pdp_getgtp1(struct pdp_t **pdp, uint32_t teid){
+ if (teid>=PDP_MAX) {
+ return -1; /* Not found */
+ }
+ else {
+ *pdp = &pdpa[teid];
+ return 0; /* We do no validity checking. */
+ }
+}
+
+
+int pdp_tidhash(uint64_t tid) {
+ return (lookup(&tid, sizeof(tid), 0) % PDP_MAX);
+}
+
+int pdp_tidset(struct pdp_t *pdp, uint64_t tid) {
+ int hash = pdp_tidhash(tid);
+ struct pdp_t *pdp2;
+ struct pdp_t *pdp_prev = NULL;
+ if (PDP_DEBUG) printf("Begin pdp_tidset tid = %llx\n", tid);
+ pdp->tid = tid;
+ for (pdp2 = hashtid[hash]; pdp2; pdp2 = pdp2->tidnext)
+ pdp_prev = pdp2;
+ if (!pdp_prev)
+ hashtid[hash] = pdp;
+ else
+ pdp_prev->tidnext = pdp;
+ if (PDP_DEBUG) printf("End pdp_tidset\n");
+ return 0;
+}
+
+int pdp_tiddel(struct pdp_t *pdp) {
+ int hash = pdp_tidhash(pdp->tid);
+ struct pdp_t *pdp2;
+ struct pdp_t *pdp_prev = NULL;
+ if (PDP_DEBUG) printf("Begin pdp_tiddel tid = %llx\n", pdp->tid);
+ for (pdp2 = hashtid[hash]; pdp2; pdp2 = pdp2->tidnext) {
+ if (pdp2 == pdp) {
+ if (!pdp_prev)
+ hashtid[hash] = pdp2->tidnext;
+ else
+ pdp_prev->tidnext = pdp2->tidnext;
+ if (PDP_DEBUG) printf("End pdp_tidset: PDP found\n");
+ return 0;
+ }
+ pdp_prev = pdp2;
+ }
+ if (PDP_DEBUG) printf("End pdp_tidset: PDP not found\n");
+ return EOF; /* End of linked list and not found */
+}
+
+int pdp_tidget(struct pdp_t **pdp, uint64_t tid) {
+ int hash = pdp_tidhash(tid);
+ struct pdp_t *pdp2;
+ if (PDP_DEBUG) printf("Begin pdp_tidget tid = %llx\n", tid);
+ for (pdp2 = hashtid[hash]; pdp2; pdp2 = pdp2->tidnext) {
+ if (pdp2->tid == tid) {
+ *pdp = pdp2;
+ if (PDP_DEBUG) printf("Begin pdp_tidget. Found\n");
+ return 0;
+ }
+ }
+ if (PDP_DEBUG) printf("Begin pdp_tidget. Not found\n");
+ return EOF; /* End of linked list and not found */
+}
+
+int pdp_iphash(void* ipif, struct ul66_t *eua) {
+ /*printf("IPhash %ld\n", lookup(eua->v, eua->l, ipif) % PDP_MAX);*/
+ return (lookup(eua->v, eua->l, ipif) % PDP_MAX);
+}
+
+int pdp_ipset(struct pdp_t *pdp, void* ipif, struct ul66_t *eua) {
+ int hash;
+ struct pdp_t *pdp2;
+ struct pdp_t *pdp_prev = NULL;
+
+ if (PDP_DEBUG) printf("Begin pdp_ipset %d %d %2x%2x%2x%2x\n",
+ (unsigned) ipif, eua->l,
+ eua->v[2], eua->v[3],
+ eua->v[4], eua->v[5]);
+
+ pdp->ipif = ipif;
+ pdp->eua.l = eua->l;
+ memcpy(pdp->eua.v, eua->v, eua->l);
+
+ hash = pdp_iphash(pdp->ipif, &pdp->eua);
+
+ for (pdp2 = haship[hash]; pdp2; pdp2 = pdp2->ipnext)
+ pdp_prev = pdp2;
+ if (!pdp_prev)
+ haship[hash] = pdp;
+ else
+ pdp_prev->ipnext = pdp;
+ if (PDP_DEBUG) printf("End pdp_ipset\n");
+ return 0;
+}
+
+int pdp_ipdel(struct pdp_t *pdp) {
+ int hash = pdp_iphash(pdp->ipif, &pdp->eua);
+ struct pdp_t *pdp2;
+ struct pdp_t *pdp_prev = NULL;
+ if (PDP_DEBUG) printf("Begin pdp_ipdel\n");
+ for (pdp2 = haship[hash]; pdp2; pdp2 = pdp2->ipnext) {
+ if (pdp2 == pdp) {
+ if (!pdp_prev)
+ haship[hash] = pdp2->ipnext;
+ else
+ pdp_prev->ipnext = pdp2->ipnext;
+ if (PDP_DEBUG) printf("End pdp_ipdel: PDP found\n");
+ return 0;
+ }
+ pdp_prev = pdp2;
+ }
+ if (PDP_DEBUG) printf("End pdp_ipdel: PDP not found\n");
+ return EOF; /* End of linked list and not found */
+}
+
+int pdp_ipget(struct pdp_t **pdp, void* ipif, struct ul66_t *eua) {
+ int hash = pdp_iphash(ipif, eua);
+ struct pdp_t *pdp2;
+ /*printf("Begin pdp_ipget %d %d %2x%2x%2x%2x\n", (unsigned)ipif, eua->l,
+ eua->v[2],eua->v[3],eua->v[4],eua->v[5]);*/
+ for (pdp2 = haship[hash]; pdp2; pdp2 = pdp2->ipnext) {
+ if ((pdp2->ipif == ipif) && (pdp2->eua.l == eua->l) &&
+ (memcmp(&pdp2->eua.v, &eua->v, eua->l) == 0)) {
+ *pdp = pdp2;
+ /*printf("End pdp_ipget. Found\n");*/
+ return 0;
+ }
+ }
+ if (PDP_DEBUG) printf("End pdp_ipget Notfound %d %d %2x%2x%2x%2x\n",
+ (unsigned)ipif, eua->l, eua->v[2],eua->v[3],eua->v[4],eua->v[5]);
+ return EOF; /* End of linked list and not found */
+}
+
+/* Various conversion functions */
+
+int pdp_ntoeua(struct in_addr *src, struct ul66_t *eua) {
+ eua->l=6;
+ eua->v[0]=0xf1; /* IETF */
+ eua->v[1]=0x21; /* IPv4 */
+ memcpy(&eua->v[2], src, 4); /* Copy a 4 byte address */
+ return 0;
+}
+
+uint64_t pdp_gettid(uint64_t imsi, uint8_t nsapi) {
+ return (imsi & 0x0fffffffffffffff) + ((uint64_t)nsapi << 60);
+}
+
+int ulcpy(void* dst, void* src, size_t size) {
+ if (((struct ul255_t*)src)->l <= size) {
+ ((struct ul255_t*)dst)->l = ((struct ul255_t*)src)->l;
+ memcpy(((struct ul255_t*)dst)->v, ((struct ul255_t*)src)->v,
+ ((struct ul255_t*)dst)->l);
+ return 0;
+ }
+ else return EOF;
+}
diff --git a/gtp/pdp.h b/gtp/pdp.h
new file mode 100644
index 0000000..b9ca62a
--- /dev/null
+++ b/gtp/pdp.h
@@ -0,0 +1,203 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+#ifndef _PDP_H
+#define _PDP_H
+
+#define PDP_MAX 1024 /* Max number of PDP contexts */
+
+#define PDP_DEBUG 0 /* Print debug information */
+
+/* GTP Information elements from 29.060 v3.9.0 7.7 Information Elements */
+/* Also covers version 0. Note that version 0 6: QOS Profile was superceded *
+ * by 135: QOS Profile in version 1 */
+
+
+struct sl_t {
+int l;
+char *v;
+};
+
+struct ul_t {
+int l;
+unsigned char *v;
+};
+
+struct ul16_t {
+int l;
+unsigned char v[16];
+};
+
+struct ul66_t {
+int l;
+unsigned char v[66];
+};
+
+struct ul255_t {
+int l;
+unsigned char v[255];
+};
+
+
+/* ***********************************************************
+ * Information storage for each PDP context
+ *
+ * Information storage for each PDP context is defined in
+ * 23.060 section 13.3 and 03.60. Includes IMSI, MSISDN, APN,
+ * PDP-type, PDP-address (IP address), sequence numbers, charging ID.
+ * For the SGSN it also includes radio related mobility
+ * information.
+ * The following structure is a combination of the storage
+ * requirements for each PDP context for the GGSN and SGSN.
+ * It contains both 23.060 as well as 03.60 parameters.
+ * Information is stored in the format for information elements
+ * described in 29.060 and 09.60.
+ * 31 * 4 + 15 structs + = 120 + 15 structs ~ 2k / context
+ * Structs: IP address 16+4 bytes (6), APN 255 bytes (2)
+ * QOS: 255 bytes (3), msisdn 16 bytes (1),
+ *
+ * TODO: We need to consider who manages the pdp_t hash tables
+ * Is it gtp_lib, or is it the application?
+ * I suppose that it will be gtp_lib.
+ * SGSN will ask gtplib for new pdp_t. Fill out the fields,
+ * and pass it on to gtp_create_pdp_req.
+ * GGSN will receive gtp_create_pdp_ind, create new pdp_t and
+ * send responce to SGSN.
+ * SGSN will receive response and gtplib will find the
+ * original pdp_t corresponding to the request. This will be
+ * passed on to the application.
+ * Eventually the SGSN will close the connection, and the
+ * pdp_t will be freed by gtplib in SGSN and GGSN
+ * This means that gtplib need to have functions to
+ * allocate, free, sort and find pdp_t
+ * (newpdp, freepdp, getpdp)
+ * Hash tables: TID, IMSI, IP etc.)
+ *************************************************************/
+
+struct pdp_t {
+ /* Parameter determining if this PDP is in use. */
+ uint8_t inuse; /* 0=free. 1=used by somebody */
+
+ /* Pointers related to hash tables */
+ struct pdp_t *tidnext;
+ struct pdp_t *ipnext;
+
+ /* Parameters shared by all PDP context belonging to the same MS */
+
+ void *ipif; /* IP network interface */
+ void *asap; /* Application specific service access point */
+
+ uint64_t imsi; /* International Mobile Subscriber Identity.*/
+ struct ul16_t msisdn; /* The basic MSISDN of the MS. */
+ uint8_t mnrg; /* Indicates whether the MS is marked as not reachable for PS at the HLR. (1 bit, not transmitted) */
+ uint8_t cch_sub; /* The charging characteristics for the MS, e.g. normal, prepaid, flat-rate, and/or hot billing subscription. (not transmitted) */
+ uint16_t traceref; /* Identifies a record or a collection of records for a particular trace. */
+ uint16_t tracetype;/* Indicates the type of trace. */
+ struct ul_t triggerid;/* Identifies the entity that initiated the trace. */
+ struct ul_t omcid; /* Identifies the OMC that shall receive the trace record(s). */
+ uint8_t rec_hlr; /* Indicates if HLR or VLR is performing database recovery. (1 bit, not transmitted) */
+
+ /* Parameters specific to each individual PDP context */
+
+ uint8_t pdp_id; /* Index of the PDP context. (PDP context identifier) */
+ uint8_t pdp_state;/* PDP State Packet data protocol state, INACTIVE or ACTIVE. (1 bit, not transmitted) */
+ /* struct ul_t pdp_type; * PDP type; e.g. PPP or IP. */
+ /* struct ul_t pdp_addr; * PDP address; e.g. an IP address. */
+ struct ul66_t eua; /* End user address. PDP type and address combined */
+ uint8_t pdp_dyn; /* Indicates whether PDP Address is static or dynamic. (1 bit, not transmitted) */
+ struct ul255_t apn_req;/* The APN requested. */
+ struct ul255_t apn_sub;/* The APN received from the HLR. */
+ struct ul255_t apn_use;/* The APN Network Identifier currently used. */
+ uint8_t nsapi; /* Network layer Service Access Point Identifier. (4 bit) */
+ uint16_t ti; /* Transaction Identifier. (4 or 12 bit) */
+
+ uint32_t teic_own; /* (Own Tunnel Endpoint Identifier Control) */
+ uint32_t teid_own; /* (Own Tunnel Endpoint Identifier Data I) */
+ uint32_t teic_gn; /* Tunnel Endpoint Identifier for the Gn and Gp interfaces. (Control plane) */
+ uint32_t teid_gn; /* Tunnel Endpoint Identifier for the Gn and Gp interfaces. (Data I) */
+ uint32_t tei_iu; /* Tunnel Endpoint Identifier for the Iu interface. */
+
+ uint16_t fllc; /* (Local Flow Label Control, gtp0) */
+ uint16_t fllu; /* (Local Flow Label Data I, gtp0) */
+ uint16_t flrc; /* (Remote gn/gp Flow Label Control, gtp0) */
+ uint16_t flru; /* (Remote gn/gp Flow Label Data I, gtp0) */
+
+ struct ul_t tft; /* Traffic flow template. */
+ /*struct ul16_t sgsnc; * The IP address of the SGSN currently serving this MS. (Control plane) */
+ /*struct ul16_t sgsnu; * The IP address of the SGSN currently serving this MS. (User plane) */
+ /*struct ul16_t ggsnc; * The IP address of the GGSN currently used. (Control plane) */
+ /*struct ul16_t ggsnu; * The IP address of the GGSN currently used. (User plane) */
+
+ struct ul16_t gsnlc; /* The IP address of the local GSN. (Control plane) */
+ struct ul16_t gsnlu; /* The IP address of the local GSN. (User plane) */
+ struct ul16_t gsnrc; /* The IP address of the remote GSN. (Control plane) */
+ struct ul16_t gsnru; /* The IP address of the remote GSN. (User plane) */
+
+ uint8_t vplmn_allow; /* Specifies whether the MS is allowed to use the APN in the domain of the HPLMN only, or additionally the APN in the domain of the VPLMN. (1 bit) */
+ uint8_t qos_sub0[3]; /* The quality of service profile subscribed. */
+ uint8_t qos_req0[3]; /* The quality of service profile requested. */
+ uint8_t qos_neg0[3]; /* The quality of service profile negotiated. */
+ struct ul255_t qos_sub; /* The quality of service profile subscribed. */
+ struct ul255_t qos_req; /* The quality of service profile requested. */
+ struct ul255_t qos_neg; /* The quality of service profile negotiated. */
+ uint8_t radio_pri;/* The RLC/MAC radio priority level for uplink user data transmission. (4 bit) */
+ uint16_t flow_id; /* Packet flow identifier. */
+ /* struct ul_t bssqos_neg; * The aggregate BSS quality of service profile negotiated for the packet flow that this PDP context belongs to. (NOT GTP)*/
+ uint8_t sndcpd; /* SNDCP sequence number of the next downlink N-PDU to be sent to the MS. */
+ uint8_t sndcpu; /* SNDCP sequence number of the next uplink N-PDU expected from the MS. */
+ uint8_t rec_sgsn; /* Indicates if the SGSN is performing database recovery. (1 bit, not transmitted) */
+/* uint16_t gtpsnd; GTP-U sequence number of the next downlink N-PDU to be sent to the SGSN / received from the GGSN. */
+/* uint16_t gtpsnu; GTP-U sequence number of the next uplink N-PDU to be received from the SGSN / sent to the GGSN */
+ uint16_t gtpsntx; /* GTP-U sequence number of the next downlink N-PDU to be sent (09.60 section 8.1.1.1) */
+ uint16_t gtpsnrx; /* GTP-U sequence number of the next uplink N-PDU to be received (09.60 section 8.1.1.1) */
+ uint8_t pdcpsndd; /* Sequence number of the next downlink in-sequence PDCP-PDU to be sent to the MS. */
+ uint8_t pdcpsndu; /* Sequence number of the next uplink in-sequence PDCP-PDU expected from the MS. */
+ uint32_t cid; /* Charging identifier, identifies charging records generated by SGSN and GGSN. */
+ uint16_t cch_pdp; /* The charging characteristics for this PDP context, e.g. normal, prepaid, flat-rate, and/or hot billing. */
+ struct ul16_t rnc_addr;/* The IP address of the RNC currently used. */
+ uint8_t reorder; /* Specifies whether the GGSN shall reorder N-PDUs received from the SGSN / Specifies whether the SGSN shall reorder N-PDUs before delivering the N-PSUs to the MS. (1 bit) */
+ struct ul255_t pco_req; /* Requested packet control options. */
+ struct ul255_t pco_neg; /* Negotiated packet control options. */
+ uint32_t selmode; /* Selection mode. */
+ uint64_t tid; /* (Combination of imsi and nsapi) */
+};
+
+
+/* functions related to pdp_t management */
+int pdp_init();
+int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
+ struct pdp_t *pdp_old);
+int pdp_freepdp(struct pdp_t *pdp);
+int pdp_getpdp(struct pdp_t **pdp);
+
+int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl);
+int pdp_getgtp1(struct pdp_t **pdp, uint32_t teid);
+
+int pdp_tidhash(uint64_t tid);
+int pdp_tidset(struct pdp_t *pdp, uint64_t tid);
+int pdp_tiddel(struct pdp_t *pdp);
+int pdp_tidget(struct pdp_t **pdp, uint64_t tid);
+
+int pdp_iphash(void* ipif, struct ul66_t *eua);
+int pdp_ipset(struct pdp_t *pdp, void* ipif, struct ul66_t *eua);
+int pdp_ipdel(struct pdp_t *pdp);
+int pdp_ipget(struct pdp_t **pdp, void* ipif, struct ul66_t *eua);
+
+int pdp_ntoeua(struct in_addr *src, struct ul66_t *eua);
+uint64_t pdp_gettid(uint64_t imsi, uint8_t nsapi);
+int ulcpy(void* dst, void* src, size_t size);
+
+#endif /* !_PDP_H */
diff --git a/gtp/queue.c b/gtp/queue.c
new file mode 100644
index 0000000..0080e43
--- /dev/null
+++ b/gtp/queue.c
@@ -0,0 +1,249 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+/*
+ * Queue.c
+ * Reliable delivery of signalling messages
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <netinet/in.h>
+#include <string.h>
+#include "pdp.h"
+#include "gtp.h"
+#include "queue.h"
+
+int queue_print(struct queue_t *queue) {
+ int n;
+ printf("Queue: %x Next: %d First: %d Last: %d\n", (int) queue, queue->next, queue->first, queue->last);
+ printf("# State seq next prev timeout retrans\n");
+ for (n=0; n<QUEUE_SIZE; n++) {
+ printf("%d %d %d %d %d %d %d\n",
+ n,
+ queue->qmsga[n].state,
+ queue->qmsga[n].seq,
+ queue->qmsga[n].next,
+ queue->qmsga[n].prev,
+ (int) queue->qmsga[n].timeout,
+ queue->qmsga[n].retrans);
+ }
+ return 0;
+}
+
+int queue_seqhash(struct sockaddr_in *peer, uint16_t seq) {
+ /* With QUEUE_HASH_SIZE = 2^16 this describes all possible
+ seq values. Thus we have perfect hash for the request queue.
+ For the response queue we might have collisions, but not very
+ often.
+ For performance optimisation we should remove the modulus
+ operator, but this is only valid for QUEUE_HASH_SIZE = 2^16 */
+ return seq % QUEUE_HASH_SIZE;
+}
+
+int queue_seqset(struct queue_t *queue, struct qmsg_t *qmsg,
+ struct sockaddr_in *peer, uint16_t seq) {
+ int hash = queue_seqhash(peer, seq);
+ struct qmsg_t *qmsg2;
+ struct qmsg_t *qmsg_prev = NULL;
+
+ if (QUEUE_DEBUG) printf("Begin queue_seqset seq = %d\n", (int) seq);
+ if (QUEUE_DEBUG) printf("SIZEOF PEER %d, *PEER %d\n", sizeof(peer), sizeof(*peer));
+
+ qmsg->seq = seq;
+ memcpy(&qmsg->peer, peer, sizeof(*peer));
+
+ for (qmsg2 = queue->hashseq[hash]; qmsg2; qmsg2 = qmsg2->seqnext)
+ qmsg_prev = qmsg2;
+ if (!qmsg_prev)
+ queue->hashseq[hash] = qmsg;
+ else
+ qmsg_prev->seqnext = qmsg;
+ if (QUEUE_DEBUG) printf("End queue_seqset\n");
+ return 0;
+}
+int queue_seqdel(struct queue_t *queue, struct qmsg_t *qmsg) {
+ int hash = queue_seqhash(&qmsg->peer, qmsg->seq);
+ struct qmsg_t *qmsg2;
+ struct qmsg_t *qmsg_prev = NULL;
+ if (QUEUE_DEBUG) printf("Begin queue_seqdel seq = %d\n", (int) qmsg->seq);
+
+ for (qmsg2 = queue->hashseq[hash]; qmsg2; qmsg2 = qmsg2->seqnext) {
+ if (qmsg == qmsg) {
+ if (!qmsg_prev)
+ queue->hashseq[hash] = qmsg2->seqnext;
+ else
+ qmsg_prev->seqnext = qmsg2->seqnext;
+ if (QUEUE_DEBUG) printf("End queue_seqset: SEQ found\n");
+ return 0;
+ }
+ qmsg_prev = qmsg2;
+ }
+ printf("End queue_seqset: SEQ not found\n");
+ return EOF; /* End of linked list and not found */
+}
+
+
+/* Allocates and initialises new queue structure */
+int queue_new(struct queue_t **queue) {
+ if (QUEUE_DEBUG) printf("queue_new\n");
+ *queue = calloc(1, sizeof(struct queue_t));
+ (*queue)->next = 0;
+ (*queue)->first = -1;
+ (*queue)->last = -1;
+
+ if (QUEUE_DEBUG) queue_print(*queue);
+ if (*queue) return 0;
+ else return EOF;
+}
+
+/* Deallocates queue structure */
+int queue_free(struct queue_t *queue) {
+ if (QUEUE_DEBUG) printf("queue_free\n");
+ if (QUEUE_DEBUG) queue_print(queue);
+ free(queue);
+ return 0;
+}
+
+int queue_newmsg(struct queue_t *queue, struct qmsg_t **qmsg,
+ struct sockaddr_in *peer, uint16_t seq) {
+ if (QUEUE_DEBUG) printf("queue_newmsg %d\n", (int) seq);
+ if (queue->qmsga[queue->next].state == 1) {
+ return EOF; /* Queue is full */
+ }
+ else {
+ *qmsg = &queue->qmsga[queue->next];
+ queue_seqset(queue, *qmsg, peer, seq);
+ (*qmsg)->state = 1; /* Space taken */
+ (*qmsg)->this = queue->next;
+ (*qmsg)->next=-1; /* End of the queue */
+ (*qmsg)->prev=queue->last; /* Link to the previous */
+ queue->qmsga[queue->last].next=queue->next; /* Link previous to us */
+ queue->last = queue->next; /* End of queue */
+ if (queue->first == -1) queue->first = queue->next;
+ queue->next = (queue->next+1) % QUEUE_SIZE; /* Increment */
+ if (QUEUE_DEBUG) queue_print(queue);
+ return 0;
+ }
+}
+
+int queue_freemsg(struct queue_t *queue, struct qmsg_t *qmsg) {
+ if (QUEUE_DEBUG) printf("queue_freemsg\n");
+ if (qmsg->state != 1) {
+ return EOF; /* Not in queue */
+ }
+
+ queue_seqdel(queue, qmsg);
+
+ if (qmsg->next == -1) /* Are we the last in queue? */
+ queue->last = qmsg->prev;
+ else
+ queue->qmsga[qmsg->next].prev = qmsg->prev;
+
+ if (qmsg->prev == -1) /* Are we the first in queue? */
+ queue->first = qmsg->next;
+ else
+ queue->qmsga[qmsg->prev].next = qmsg->next;
+
+ memset(qmsg, 0, sizeof(struct qmsg_t)); /* Just to be safe */
+
+ if (QUEUE_DEBUG) queue_print(queue);
+
+ return 0;
+}
+
+int queue_back(struct queue_t *queue, struct qmsg_t *qmsg) {
+ if (QUEUE_DEBUG) printf("queue_back\n");
+ if (qmsg->state != 1) {
+ return EOF; /* Not in queue */
+ }
+
+ /* Insert stuff to maintain hash table */
+
+ if (qmsg->next != -1) {/* Only swop if there are others */
+ queue->qmsga[qmsg->next].prev = qmsg->prev;
+ queue->first = qmsg->next;
+
+ qmsg->next = -1;
+ qmsg->prev = queue->last;
+ if (queue->last != -1) queue->qmsga[queue->last].next = qmsg->this;
+ queue->last = qmsg->this;
+ }
+ if (QUEUE_DEBUG) queue_print(queue);
+ return 0;
+}
+
+/* Get the element with a particular sequence number */
+int queue_getfirst(struct queue_t *queue, struct qmsg_t **qmsg) {
+ /*printf("queue_getfirst\n");*/
+ if (queue->first == -1) {
+ *qmsg = NULL;
+ return EOF; /* End of queue = queue is empty. */
+ }
+ *qmsg = &queue->qmsga[queue->first];
+ if (QUEUE_DEBUG) queue_print(queue);
+ return 0;
+}
+
+int queue_getseqx(struct queue_t *queue, struct qmsg_t **qmsg,
+ struct sockaddr_in *peer, uint16_t seq) {
+ int n;
+ if (QUEUE_DEBUG) printf("queue_getseq, %d\n", (int) seq);
+ if (QUEUE_DEBUG) queue_print(queue);
+ for (n=0; n<QUEUE_SIZE; n++) {
+ if ((queue->qmsga[n].seq == seq) &&
+ (!memcmp(&queue->qmsga[n].peer, peer, sizeof(*peer)))) {
+ *qmsg = &queue->qmsga[n];
+ return 0;
+ }
+ }
+ return EOF; /* Not found */
+}
+
+int queue_seqget(struct queue_t *queue, struct qmsg_t **qmsg,
+ struct sockaddr_in *peer, uint16_t seq) {
+ int hash = queue_seqhash(peer, seq);
+ struct qmsg_t *qmsg2;
+ if (QUEUE_DEBUG) printf("Begin queue_seqget seq = %d\n", (int) seq);
+ for (qmsg2 = queue->hashseq[hash]; qmsg2; qmsg2 = qmsg2->seqnext) {
+ if ((qmsg2->seq == seq) &&
+ (!memcmp(&qmsg2->peer, peer, sizeof(*peer)))) {
+ *qmsg = qmsg2;
+ if (QUEUE_DEBUG) printf("End queue_seqget. Found\n");
+ return 0;
+ }
+ }
+ if (QUEUE_DEBUG) printf("End queue_seqget. Not found\n");
+ return EOF; /* End of linked list and not found */
+}
+
+int queue_freemsg_seq(struct queue_t *queue, struct sockaddr_in *peer,
+ uint16_t seq, uint8_t *type, void **aid) {
+ struct qmsg_t *qmsg;
+ if (queue_seqget(queue, &qmsg, peer, seq)) {
+ *aid = NULL;
+ *type = 0;
+ return EOF;
+ }
+ *aid = qmsg->aid;
+ *type = qmsg->type;
+ if (queue_freemsg(queue, qmsg)) {
+ return EOF;
+ }
+ return 0;
+}
diff --git a/gtp/queue.h b/gtp/queue.h
new file mode 100644
index 0000000..076a3ef
--- /dev/null
+++ b/gtp/queue.h
@@ -0,0 +1,77 @@
+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+/*
+ * Queue.c
+ * Reliable delivery of signalling messages
+ */
+
+#ifndef _QUEUE_H
+#define _QUEUE_H
+
+#define QUEUE_DEBUG 0 /* Print debug information */
+
+#define QUEUE_SIZE 256 /* Size of retransmission queue */
+#define QUEUE_HASH_SIZE 65536 /* Size of hash table (2^16) */
+
+struct qmsg_t { /* Holder for queued packets */
+ int state; /* 0=empty, 1=full */
+ uint16_t seq; /* The sequence number */
+ u_int8_t type; /* The type of packet */
+ void *aid; /* Application specific pointer */
+ union gtp_packet p; /* The packet stored */
+ int l; /* Length of the packet */
+ struct sockaddr_in peer;/* Address packet was sent to / received from */
+ struct qmsg_t *seqnext; /* Pointer to next in sequence hash list */
+ int next; /* Pointer to the next in queue. -1: Last */
+ int prev; /* Pointer to the previous in queue. -1: First */
+ int this; /* Pointer to myself */
+ time_t timeout; /* When do we retransmit this packet? */
+ int retrans; /* How many times did we retransmit this? */
+};
+
+struct queue_t {
+ struct qmsg_t qmsga[QUEUE_SIZE]; /* Array holding signalling messages */
+ void *hashseq[QUEUE_HASH_SIZE]; /* Hash array */
+ int next; /* Next location in queue to use */
+ int first; /* First packet in queue (oldest timeout) */
+ int last; /* Last packet in queue (youngest timeout) */
+};
+
+
+/* Allocates and initialises new queue structure */
+int queue_new(struct queue_t **queue);
+/* Deallocates queue structure */
+int queue_free(struct queue_t *queue);
+/* Find a new queue element. Return EOF if allready full */
+int queue_newmsg(struct queue_t *queue, struct qmsg_t **qmsg,
+ struct sockaddr_in *peer, uint16_t seq);
+/* Remove an element from the queue. */
+int queue_freemsg(struct queue_t *queue, struct qmsg_t *qmsg);
+/* Move an element to the back of the queue */
+int queue_back(struct queue_t *queue, struct qmsg_t *qmsg);
+/* Get the first element in the queue (oldest) */
+int queue_getfirst(struct queue_t *queue, struct qmsg_t **qmsg);
+/* Get the element with a particular sequence number */
+int queue_seqget(struct queue_t *queue, struct qmsg_t **qmsg,
+ struct sockaddr_in *peer, uint16_t seq);
+/* Free message based on sequence number */
+int queue_freemsg_seq(struct queue_t *queue, struct sockaddr_in *peer,
+ uint16_t seq, uint8_t *type, void **aid);
+
+
+#endif /* !_QUEUE_H */
+