add new program to use UDP broadcast packets to find ip.access BTS in the network
diff --git a/src/Makefile.am b/src/Makefile.am
index 6664a1c..193b5dc 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,7 +1,7 @@
INCLUDES = $(all_includes) -I$(top_srcdir)/include
AM_CFLAGS=-Wall
-sbin_PROGRAMS = bsc_hack bs11_config
+sbin_PROGRAMS = bsc_hack bs11_config ipaccess-find
bsc_hack_SOURCES = bsc_hack.c abis_rsl.c abis_nm.c gsm_04_08.c gsm_data.c \
gsm_subscriber.c msgb.c select.c chan_alloc.c timer.c debug.c db.c \
@@ -11,3 +11,5 @@
bsc_hack_LDADD = -ldl -ldbi
bs11_config_SOURCES = bs11_config.c abis_nm.c gsm_data.c msgb.c debug.c select.c timer.c rs232.c
+
+ipaccess_find_SOURCES = ipaccess-find.c select.c timer.c
diff --git a/src/ipaccess-find.c b/src/ipaccess-find.c
new file mode 100644
index 0000000..de96a16
--- /dev/null
+++ b/src/ipaccess-find.c
@@ -0,0 +1,149 @@
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+
+#include <openbsc/select.h>
+#include <openbsc/timer.h>
+
+static int udp_sock(void)
+{
+ int fd, rc, bc = 1;
+ struct sockaddr_in sa;
+
+ fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (fd < 0)
+ return fd;
+
+ sa.sin_family = AF_INET;
+ sa.sin_port = htons(3006);
+ sa.sin_addr.s_addr = INADDR_ANY;
+ inet_aton("192.168.100.11", &sa.sin_addr);
+
+ rc = bind(fd, (struct sockaddr *)&sa, sizeof(sa));
+ if (rc < 0)
+ goto err;
+
+ rc = setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &bc, sizeof(bc));
+ if (rc < 0)
+ goto err;
+
+#if 0
+ rc = connect(fd, (struct sockaddr *)&sa, sizeof(sa));
+ if (rc < 0)
+ goto err;
+#endif
+ return fd;
+
+err:
+ close(fd);
+ return rc;
+}
+
+const unsigned char find_pkt[] = { 0x00, 0x0b, 0xfe, 0x00, 0x04, 0x01, 0x06, 0x01, 0x07, 0x01, 0x02, 0x01, 0x03, 0x01, 0x08 };
+
+
+static int bcast_find(int fd)
+{
+ struct sockaddr_in sa;
+
+ sa.sin_family = AF_INET;
+ sa.sin_port = htons(3006);
+ inet_aton("255.255.255.255", &sa.sin_addr);
+
+ return sendto(fd, find_pkt, sizeof(find_pkt), 0, (struct sockaddr *) &sa, sizeof(sa));
+}
+
+static int parse_response(unsigned char *buf, int len)
+{
+ u_int8_t t_len;
+ u_int8_t t_tag;
+ u_int8_t *cur = buf;
+
+ cur += 6;
+
+ while (cur < buf + len) {
+ t_len = *cur++;
+ t_tag = *cur++;
+
+ printf("tag=0x%02x, val='%s' ", t_tag, cur);
+
+ cur += t_len;
+ }
+ printf("\n");
+ return 0;
+}
+
+static int read_response(int fd)
+{
+ unsigned char buf[255];
+ struct sockaddr_in sa;
+ int len;
+ socklen_t sa_len = sizeof(sa);
+
+ len = recvfrom(fd, buf, sizeof(buf), 0, (struct sockaddr *)&sa, &sa_len);
+ if (len < 0)
+ return len;
+
+ return parse_response(buf, len);
+}
+
+static int bfd_cb(struct bsc_fd *bfd, unsigned int flags)
+{
+ if (flags & BSC_FD_READ)
+ return read_response(bfd->fd);
+ if (flags & BSC_FD_WRITE) {
+ bfd->when &= ~BSC_FD_WRITE;
+ return bcast_find(bfd->fd);
+ }
+ return 0;
+}
+
+static struct timer_list timer;
+
+static void timer_cb(void *_data)
+{
+ struct bsc_fd *bfd = _data;
+
+ bfd->when |= BSC_FD_WRITE;
+
+ schedule_timer(&timer, 5, 0);
+}
+
+int main(int argc, char **argv)
+{
+ struct bsc_fd bfd;
+ int rc;
+
+ printf("ipaccess-find (C) 2009 by Harald Welte\n");
+ printf("This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY\n\n");
+
+ bfd.cb = bfd_cb;
+ bfd.when = BSC_FD_READ | BSC_FD_WRITE;
+ bfd.fd = udp_sock();
+ if (bfd.fd < 0)
+ exit(2);
+
+ bsc_register_fd(&bfd);
+
+ timer.cb = timer_cb;
+ timer.data = &bfd;
+
+ schedule_timer(&timer, 5, 0);
+
+ printf("Trying to find ip.access BTS by broadcast UDP...\n");
+
+ while (1) {
+ rc = bsc_select_main();
+ if (rc < 0)
+ exit(3);
+ }
+
+ exit(0);
+}
+