Add GTP hub initial code base.
First steps towards a new GTP hub. The aim is to mux GTP connections, so that
multiple SGSN <--> GGSN links can pass through a single point. Background:
allow having more than one SGSN, possibly in various remote locations.
The recent addition of OAP to GSUP is related to the same background idea.
(This is a collapsed patch of various changes that do not make sense to review
in chronological order anymore, since a lot of it has thorougly transmorphed
after it was first committed.)
Sponsored-by: On-Waves ehf
diff --git a/openbsc/tests/Makefile.am b/openbsc/tests/Makefile.am
index 1b557d4..aacfe0b 100644
--- a/openbsc/tests/Makefile.am
+++ b/openbsc/tests/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = gsm0408 db channel mgcp gprs abis gbproxy trau subscr oap
+SUBDIRS = gsm0408 db channel mgcp gprs abis gbproxy trau subscr oap gtphub
if BUILD_NAT
SUBDIRS += bsc-nat bsc-nat-trie
diff --git a/openbsc/tests/gtphub/Makefile.am b/openbsc/tests/gtphub/Makefile.am
new file mode 100644
index 0000000..ecc6d62
--- /dev/null
+++ b/openbsc/tests/gtphub/Makefile.am
@@ -0,0 +1,20 @@
+AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include
+AM_CFLAGS=-Wall -ggdb3 $(LIBOSMOCORE_CFLAGS)
+
+EXTRA_DIST = \
+ gtphub_test.ok \
+ gtphub_nc_test.sh \
+ gtphub_nc_test.ok \
+ hex2bin.py
+
+noinst_PROGRAMS = gtphub_test
+
+gtphub_test_SOURCES = gtphub_test.c
+gtphub_test_LDFLAGS = \
+ -Wl,--wrap=gtphub_resolve_ggsn_addr
+
+gtphub_test_LDADD = \
+ $(top_builddir)/src/gprs/gtphub.o \
+ $(LIBOSMOCORE_LIBS) \
+ -lgtp -lrt
+
diff --git a/openbsc/tests/gtphub/gtphub_test.c b/openbsc/tests/gtphub/gtphub_test.c
new file mode 100644
index 0000000..af8f3ed
--- /dev/null
+++ b/openbsc/tests/gtphub/gtphub_test.c
@@ -0,0 +1,709 @@
+/* Test the GTP hub */
+
+/* (C) 2015 by sysmocom s.f.m.c. GmbH
+ * All Rights Reserved
+ *
+ * Author: Neels Hofmeyr <nhofmeyr@sysmcom.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <unistd.h>
+
+#include <osmocom/core/utils.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/application.h>
+
+#include <openbsc/debug.h>
+
+#include <openbsc/gtphub.h>
+#include <gtp.h>
+#include <gtpie.h>
+
+#define EXPIRE_ALL ((60 * GTPH_TEI_MAPPING_EXPIRY_MINUTES) + 1)
+
+/* Make non-public API accessible */
+
+void gtphub_init(struct gtphub *hub);
+
+void *osmo_gtphub_ctx;
+
+/* TODO copied from libosmo-abis/src/subchan_demux.c, remove dup */
+static int llist_len(struct llist_head *head)
+{
+ struct llist_head *entry;
+ int i = 0;
+
+ llist_for_each(entry, head)
+ i++;
+
+ return i;
+}
+
+static void nr_mapping_free(struct expiring_item *e)
+{
+ struct nr_mapping *m = container_of(e, struct nr_mapping,
+ expiry_entry);
+ nr_mapping_del(m);
+ talloc_free(m);
+}
+
+static struct nr_mapping *nr_mapping_alloc(void)
+{
+ struct nr_mapping *m;
+ m = talloc(osmo_gtphub_ctx, struct nr_mapping);
+ nr_mapping_init(m);
+ m->expiry_entry.del_cb = nr_mapping_free;
+ return m;
+}
+
+static struct nr_mapping *nr_map_have(struct nr_map *map, void *origin, nr_t orig, time_t now)
+{
+ struct nr_mapping *mapping;
+
+ mapping = nr_map_get(map, origin, orig);
+ if (!mapping) {
+ mapping = nr_mapping_alloc();
+ mapping->origin = origin;
+ mapping->orig = orig;
+ nr_map_add(map, mapping, now);
+ }
+
+ return mapping;
+}
+
+static nr_t nr_map_verify(const struct nr_map *map, void *origin, nr_t orig, nr_t expect_repl)
+{
+ struct nr_mapping *m;
+ m = nr_map_get(map, origin, orig);
+
+ if (!m) {
+ printf("mapping not found for %p %d\n", origin, orig);
+ return 0;
+ }
+
+ if (m->repl != expect_repl) {
+ printf("mapping found, but nr mismatches: expect %d, got %d\n",
+ (int)expect_repl, (int)m->repl);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int nr_map_verify_inv(const struct nr_map *map, nr_t repl,
+ void *expect_origin, nr_t expect_orig)
+{
+ struct nr_mapping *m;
+ m = nr_map_get_inv(map, repl);
+ if (!m) {
+ printf("mapping not found for %d\n", (int)repl);
+ return 0;
+ }
+
+ if (m->origin != expect_origin) {
+ printf("mapping found, but origin mismatches: expect %p, got %p\n",
+ expect_origin, m->origin);
+ return 0;
+ }
+
+ if (m->orig != expect_orig) {
+ printf("mapping found, but nr mismatches: expect %d, got %d\n",
+ (int)expect_orig, (int)m->orig);
+ return 0;
+ }
+
+ return 1;
+}
+
+
+static void test_nr_map_basic(void)
+{
+ struct nr_pool _pool;
+ struct nr_pool *pool = &_pool;
+ struct nr_map _map;
+ struct nr_map *map = &_map;
+
+ nr_pool_init(pool);
+ nr_map_init(map, pool, NULL);
+
+ OSMO_ASSERT(llist_empty(&map->mappings));
+
+#define TEST_N_HALF 100
+#define TEST_N (2*TEST_N_HALF)
+#define TEST_I 123
+ uint32_t i, check_i;
+ uint32_t m[TEST_N];
+ struct nr_mapping *mapping;
+
+ /* create half of TEST_N mappings from one origin */
+ void *origin1 = (void*)0x1234;
+ for (i = 0; i < TEST_N_HALF; i++) {
+ nr_t orig = TEST_I + i;
+ mapping = nr_map_have(map, origin1, orig, 0);
+ m[i] = mapping->repl;
+ OSMO_ASSERT(m[i] != 0);
+ OSMO_ASSERT(llist_len(&map->mappings) == (i+1));
+ for (check_i = 0; check_i < i; check_i++)
+ OSMO_ASSERT(m[check_i] != m[i]);
+ }
+ OSMO_ASSERT(llist_len(&map->mappings) == TEST_N_HALF);
+
+ /* create another TEST_N mappings with the same original numbers, but
+ * from a different origin */
+ void *origin2 = (void*)0x5678;
+ for (i = 0; i < TEST_N_HALF; i++) {
+ int i2 = TEST_N_HALF + i;
+ nr_t orig = TEST_I + i;
+ mapping = nr_map_have(map, origin2, orig, 0);
+ m[i2] = mapping->repl;
+ OSMO_ASSERT(m[i2] != 0);
+ OSMO_ASSERT(llist_len(&map->mappings) == (i2+1));
+ for (check_i = 0; check_i < i2; check_i++)
+ OSMO_ASSERT(m[check_i] != m[i2]);
+ }
+ OSMO_ASSERT(llist_len(&map->mappings) == TEST_N);
+
+ /* verify mappings */
+ for (i = 0; i < TEST_N_HALF; i++) {
+ nr_t orig = TEST_I + i;
+ {
+ OSMO_ASSERT(nr_map_verify(map, origin1, orig, m[i]));
+ OSMO_ASSERT(nr_map_verify_inv(map, m[i], origin1, orig));
+ }
+ {
+ int i2 = TEST_N_HALF + i;
+ OSMO_ASSERT(nr_map_verify(map, origin2, orig, m[i2]));
+ OSMO_ASSERT(nr_map_verify_inv(map, m[i2], origin2, orig));
+ }
+ }
+
+ /* remove all mappings */
+ for (i = 0; i < TEST_N_HALF; i++) {
+ OSMO_ASSERT(llist_len(&map->mappings) == (TEST_N - 2*i));
+
+ nr_t orig = TEST_I + i;
+ nr_mapping_del(nr_map_get(map, origin1, orig));
+ nr_mapping_del(nr_map_get(map, origin2, orig));
+ }
+ OSMO_ASSERT(llist_empty(&map->mappings));
+#undef TEST_N
+#undef TEST_I
+}
+
+static int nr_map_is(struct nr_map *map, const char *str)
+{
+ static char buf[4096];
+ char *pos = buf;
+ size_t len = sizeof(buf);
+ struct nr_mapping *m;
+ llist_for_each_entry(m, &map->mappings, entry) {
+ size_t wrote = snprintf(pos, len, "(%d->%d@%d), ",
+ (int)m->orig,
+ (int)m->repl,
+ (int)m->expiry_entry.expiry);
+ OSMO_ASSERT(wrote < len);
+ pos += wrote;
+ len -= wrote;
+ }
+ *pos = '\0';
+
+ if (strncmp(buf, str, sizeof(buf)) != 0) {
+ printf("FAILURE: nr_map_is() mismatches expected value:\n"
+ "expected: \"%s\"\n"
+ "is: \"%s\"\n",
+ str, buf);
+ return 0;
+ }
+ return 1;
+}
+
+static void test_expiry(void)
+{
+ struct expiry expiry;
+ struct nr_pool pool;
+ struct nr_map map;
+ int i;
+
+ expiry_init(&expiry, 30);
+ nr_pool_init(&pool);
+ nr_map_init(&map, &pool, &expiry);
+ OSMO_ASSERT(nr_map_is(&map, ""));
+
+ /* tick on empty map */
+ OSMO_ASSERT(expiry_tick(&expiry, 10000) == 0);
+ OSMO_ASSERT(nr_map_is(&map, ""));
+
+#define MAP1 \
+ "(10->1@10040), " \
+ ""
+
+#define MAP2 \
+ "(20->2@10050), " \
+ "(21->3@10051), " \
+ "(22->4@10052), " \
+ "(23->5@10053), " \
+ "(24->6@10054), " \
+ "(25->7@10055), " \
+ "(26->8@10056), " \
+ "(27->9@10057), " \
+ ""
+
+#define MAP3 \
+ "(420->10@10072), " \
+ "(421->11@10072), " \
+ "(422->12@10072), " \
+ "(423->13@10072), " \
+ "(424->14@10072), " \
+ "(425->15@10072), " \
+ "(426->16@10072), " \
+ "(427->17@10072), " \
+ ""
+
+ /* add mapping at time 10010. */
+ nr_map_have(&map, 0, 10, 10010);
+ OSMO_ASSERT(nr_map_is(&map, MAP1));
+
+ /* tick on unexpired item. */
+ OSMO_ASSERT(expiry_tick(&expiry, 10010) == 0);
+ OSMO_ASSERT(expiry_tick(&expiry, 10011) == 0);
+ OSMO_ASSERT(nr_map_is(&map, MAP1));
+
+ /* Spread mappings at 10020, 10021, ... 10027. */
+ for (i = 0; i < 8; i++)
+ nr_map_have(&map, 0, 20 + i, 10020 + i);
+ OSMO_ASSERT(nr_map_is(&map, MAP1 MAP2));
+
+ /* tick on unexpired items. */
+ OSMO_ASSERT(expiry_tick(&expiry, 10030) == 0);
+ OSMO_ASSERT(expiry_tick(&expiry, 10039) == 0);
+ OSMO_ASSERT(nr_map_is(&map, MAP1 MAP2));
+
+ /* expire the first item (from 10010). */
+ OSMO_ASSERT(expiry_tick(&expiry, 10010 + 30) == 1);
+ OSMO_ASSERT(nr_map_is(&map, MAP2));
+
+ /* again nothing to expire */
+ OSMO_ASSERT(expiry_tick(&expiry, 10041) == 0);
+ OSMO_ASSERT(nr_map_is(&map, MAP2));
+
+ /* Mappings all at the same time. */
+ for (i = 0; i < 8; i++)
+ nr_map_have(&map, 0, 420 + i, 10042);
+ OSMO_ASSERT(nr_map_is(&map, MAP2 MAP3));
+
+ /* Eight to expire, were added further above to be chronologically
+ * correct, at 10020..10027. */
+ OSMO_ASSERT(expiry_tick(&expiry, 10027 + 30) == 8);
+ OSMO_ASSERT(nr_map_is(&map, MAP3));
+
+ /* again nothing to expire */
+ OSMO_ASSERT(expiry_tick(&expiry, 10027 + 30) == 0);
+ OSMO_ASSERT(nr_map_is(&map, MAP3));
+
+ /* Eight to expire, from 10042. Now at 10042 + 30: */
+ OSMO_ASSERT(expiry_tick(&expiry, 10042 + 30) == 8);
+ OSMO_ASSERT(nr_map_is(&map, ""));
+
+#undef MAP1
+#undef MAP2
+#undef MAP3
+}
+
+
+
+/* override, requires '-Wl,--wrap=gtphub_resolve_ggsn_addr' */
+int __real_gtphub_resolve_ggsn_addr(struct gtphub *hub,
+ struct osmo_sockaddr *result,
+ struct gtp_packet_desc *p);
+
+struct osmo_sockaddr resolved_ggsn_addr = {.l = 0};
+int __wrap_gtphub_resolve_ggsn_addr(struct gtphub *hub,
+ struct osmo_sockaddr *result,
+ struct gtp_packet_desc *p)
+{
+ osmo_sockaddr_copy(result, &resolved_ggsn_addr);
+ printf("Wrap: returning GGSN addr: %s\n",
+ osmo_sockaddr_to_str(result));
+ return (resolved_ggsn_addr.l != 0)? 0 : -1;
+}
+
+#define buf_len 1024
+static uint8_t buf[buf_len];
+
+static unsigned int msg(const char *hex)
+{
+ unsigned int l = osmo_hexparse(hex, buf, buf_len);
+ OSMO_ASSERT(l > 0);
+ return l;
+}
+
+/* Compare static buf to given string constant. The amount of bytes is obtained
+ * from parsing the GTP header in buf. hex must match an osmo_hexdump() of the
+ * desired message. Return 1 if size and content match. */
+#define msg_is(MSG) _msg_is(MSG, __FILE__, __LINE__)
+static int _msg_is(const char *hex, const char *file, int line)
+{
+ struct gtp1_header_long *h = (void*)buf;
+ int len = ntoh16(h->length) + 8;
+ const char *dump = osmo_hexdump_nospc(buf, len);
+ int cmp = strcmp(dump, hex);
+
+ if (cmp != 0) {
+ printf("\n%s:%d: msg_is(): MISMATCH\n"
+ " expecting:\n'%s'\n"
+ " got:\n'%s'\n\n",
+ file,
+ line,
+ hex, dump);
+ int i;
+ int l = strlen(hex);
+ int m = strlen(dump);
+ if (m < l)
+ l = m;
+ for (i = 0; i < l; i++) {
+ if (hex[i] != dump[i]) {
+ printf("First mismatch at position %d:\n"
+ " %s\n %s\n", i, hex + i, dump + i);
+ break;
+ }
+ }
+ }
+ return cmp == 0;
+}
+
+#define same_addr(GOT, EXPECTED) _same_addr((GOT),(EXPECTED), __FILE__, __LINE__)
+static int _same_addr(const struct osmo_sockaddr *got,
+ const struct osmo_sockaddr *expected,
+ const char *file, int line)
+{
+ int cmp = osmo_sockaddr_cmp(got, expected);
+ if (!cmp)
+ return 1;
+ char buf[256];
+ printf("\n%s:%d: addr_is(): MISMATCH\n"
+ " expecting: '%s'\n"
+ " got: '%s'\n\n",
+ file, line,
+ osmo_sockaddr_to_str(expected),
+ osmo_sockaddr_to_strb(got, buf, sizeof(buf)));
+ return 0;
+}
+
+static void test_echo(void)
+{
+ struct gtphub _hub;
+ struct gtphub *hub = &_hub;
+ time_t now = 123;
+
+ gtphub_init(hub);
+
+ const char *gtp_ping_from_sgsn =
+ "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr. */
+ "01" /* type 01: Echo request */
+ "0004" /* length of 4 after header TEI */
+ "00000000" /* header TEI == 0 in Echo */
+ "abcd" /* some 16 octet sequence nr */
+ "0000" /* N-PDU 0, no extension header (why is this here?) */
+ ;
+
+ /* Same with mapped sequence number */
+ const char *gtp_ping_to_ggsn =
+ "32" "01" "0004" "00000000"
+ "6d31" /* mapped seq */
+ "00" "00";
+
+ const char *gtp_pong_from_ggsn =
+ "32"
+ "02" /* type 02: Echo response */
+ "0006" /* len */
+ "00000000" /* tei */
+ "6d31" /* mapped seq */
+ "0000" /* ext */
+ "0e01" /* 0e: Recovery, val == 1 */
+ ;
+ /* Same with unmapped sequence number */
+ const char *gtp_pong_to_sgsn =
+ "32" "02" "0006" "00000000"
+ "abcd" /* unmapped seq */
+ "00" "00" "0e01";
+
+ /* Set the GGSN address that gtphub is forced to resolve to. */
+ OSMO_ASSERT(osmo_sockaddr_init_udp(&resolved_ggsn_addr,
+ "192.168.43.34", 434)
+ == 0);
+
+ /* according to spec, we'd always send to port 2123 instead...
+ struct osmo_sockaddr ggsn_standard_port;
+ OSMO_ASSERT(osmo_sockaddr_init_udp(&ggsn_standard_port,
+ "192.168.43.34", 2123)
+ == 0);
+ */
+
+ struct osmo_sockaddr orig_sgsn_addr;
+ OSMO_ASSERT(osmo_sockaddr_init(&orig_sgsn_addr,
+ AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP,
+ "192.168.42.23", 423) == 0);
+ struct osmo_fd *ggsn_ofd = NULL;
+ struct osmo_sockaddr ggsn_addr;
+ int send;
+ send = gtphub_from_sgsns_handle_buf(hub, GTPH_PLANE_CTRL, &orig_sgsn_addr,
+ buf, msg(gtp_ping_from_sgsn), now,
+ &ggsn_ofd, &ggsn_addr);
+ OSMO_ASSERT(send > 0);
+ OSMO_ASSERT(ggsn_addr.l);
+ OSMO_ASSERT(same_addr(&ggsn_addr, &resolved_ggsn_addr));
+ OSMO_ASSERT(msg_is(gtp_ping_to_ggsn));
+
+ struct osmo_fd *sgsn_ofd;
+ struct osmo_sockaddr sgsn_addr;
+ send = gtphub_from_ggsns_handle_buf(hub, GTPH_PLANE_CTRL, &ggsn_addr,
+ buf, msg(gtp_pong_from_ggsn), now,
+ &sgsn_ofd, &sgsn_addr);
+ OSMO_ASSERT(send > 0);
+ OSMO_ASSERT(same_addr(&sgsn_addr, &orig_sgsn_addr));
+ OSMO_ASSERT(msg_is(gtp_pong_to_sgsn));
+
+ struct gtphub_peer_port *ggsn_port =
+ gtphub_port_find_sa(&hub->to_ggsns[GTPH_PLANE_CTRL],
+ &resolved_ggsn_addr);
+ OSMO_ASSERT(ggsn_port);
+ struct gtphub_peer *ggsn = ggsn_port->peer_addr->peer;
+ /* now == 123; now + 30 == 153. */
+ OSMO_ASSERT(nr_map_is(&ggsn->seq_map, "(43981->27953@153), "));
+
+ OSMO_ASSERT(nr_map_is(&hub->tei_map[GTPH_PLANE_CTRL], ""));
+ OSMO_ASSERT(nr_map_is(&hub->tei_map[GTPH_PLANE_USER], ""));
+
+ gtphub_gc(hub, now + EXPIRE_ALL);
+}
+
+static void test_create_pdp_ctx(void)
+{
+ struct gtphub _hub;
+ struct gtphub *hub = &_hub;
+ time_t now = 345;
+
+ gtphub_init(hub);
+
+ /* Tell this mock gtphub its local address for this test. */
+ OSMO_ASSERT(gsn_addr_from_str(&hub->to_sgsns[GTPH_PLANE_CTRL].local_addr,
+ "127.0.1.1") == 0);
+ OSMO_ASSERT(gsn_addr_from_str(&hub->to_sgsns[GTPH_PLANE_USER].local_addr,
+ "127.0.1.2") == 0);
+ OSMO_ASSERT(gsn_addr_from_str(&hub->to_ggsns[GTPH_PLANE_CTRL].local_addr,
+ "127.0.2.1") == 0);
+ OSMO_ASSERT(gsn_addr_from_str(&hub->to_ggsns[GTPH_PLANE_USER].local_addr,
+ "127.0.2.2") == 0);
+
+ /* This is copied from a packet that sgsnemu sends. */
+ const char *gtp_req_from_sgsn =
+ "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr. */
+ "10" /* type 16: Create PDP Context Request */
+ "0067" /* length = 8 + 103 */
+ "00000000" /* No TEI yet */
+ "abcd" /* Sequence nr */
+ "00" /* N-PDU 0 */
+ "00" /* No extensions */
+ /* IEs */
+ "02" /* 2 = IMSI */
+ "42000121436587f9"
+ "0e" "60" /* 14: Recovery = 96 */
+ "0f01" /* 15: Selection mode = MS provided APN, subscription not verified*/
+ "10" /* 16: TEI Data I */
+ "00000123"
+ "11" /* 17: TEI Control Plane */
+ "00000321"
+ "1400" /* 20: NSAPI = 0*/
+ "1a" /* 26: Charging Characteristics */
+ "0800"
+ "80" /* 128: End User Address */
+ "0002" /* length = 2: empty PDP Address */
+ "f121" /* spare 0xf0, PDP organization 1, PDP type number 0x21 = 33 */
+ "83" /* 131: Access Point Name */
+ "0008" /* length = 8 */
+ "696e7465726e6574" /* "internet" */
+ "84" /* 132: Protocol Configuration Options */
+ "0015" /* length = 21 */
+ "80c0231101010011036d69670868656d6d656c6967"
+ "85" /* 133: GSN Address */
+ "0004" /* length */
+ "abcdef00"
+ "85" /* 133: GSN Address (second entry) */
+ "0004" /* length */
+ "fedcba00"
+ "86" /* 134: MS International PSTN/ISDN Number (MSISDN) */
+ "0007" /* length */
+ "916407123254f6" /* 1946702123456(f) */
+ "87" /* 135: Quality of Service (QoS) Profile */
+ "0004" /* length */
+ "00" /* priority */
+ "0b921f" /* QoS profile data */
+ ;
+
+ const char *gtp_req_to_ggsn =
+ "32" "10" "0067" "00000000"
+ "6d31" /* mapped seq ("abcd") */
+ "00" "00" "02" "42000121436587f9" "0e60" "0f01"
+ "10" "00000001" /* mapped TEI Data I ("123") */
+ "11" "00000001" /* mapped TEI Control ("321") */
+ "1400" "1a" "0800" "80" "0002" "f121" "83"
+ "0008" "696e7465726e6574" "84" "0015"
+ "80c0231101010011036d69670868656d6d656c6967" "85" "0004"
+ "7f000201" /* replaced with gtphub's address ggsn ctrl */
+ "85" "0004"
+ "7f000202" /* replaced with gtphub's address ggsn user */
+ "86" "0007" "916407123254f6"
+ "87" "0004" "00" "0b921f"
+ ;
+
+ const char *gtp_resp_from_ggsn =
+ "32"
+ "11" /* Create PDP Context Response */
+ "004e" /* length = 78 + 8 */
+ "00000001" /* destination TEI (sent in req above) */
+ "6d31" /* mapped seq */
+ "00" "00"
+ /* IEs */
+ "01" /* 1: Cause */
+ "80" /* value = 0b10000000 = response, no rejection. */
+ "08" /* 8: Reordering Required */
+ "00" /* not required. */
+ "0e" "01" /* 14: Recovery = 1 */
+ "10" /* 16: TEI Data I */
+ "00000567"
+ "11" /* 17: TEI Control */
+ "00000765"
+ "7f" /* 127: Charging ID */
+ "00000001"
+ "80" /* 128: End User Address */
+ "0006" /* length = 6 */
+ "f121" /* spare 0xf0, PDP organization 1, PDP type number 0x21 = 33 */
+ "7f000002"
+ "84" /* 132: Protocol Configuration Options */
+ "0014" /* len = 20 */
+ "8080211002000010810608080808830600000000"
+ "85" /* 133: GSN Address (Ctrl) */
+ "0004" /* length */
+ "7f000002"
+ "85" /* 133: GSN Address (User) */
+ "0004" /* length */
+ "7f000002"
+ "87" /* 135: Quality of Service (QoS) Profile */
+ "0004" /* length */
+ "00" /* priority */
+ "0b921f" /* QoS profile data */
+ ;
+
+ const char *gtp_resp_to_sgsn =
+ "32" "11" "004e"
+ "00000321" /* unmapped TEI ("001") */
+ "abcd" /* unmapped seq ("6d31") */
+ "00" "00" "01" "80" "08" "00" "0e" "01"
+ "10" "00000002" /* mapped TEI from GGSN ("567") */
+ "11" "00000002" /* mapped TEI from GGSN ("765") */
+ "7f" "00000001" "80" "0006" "f121" "7f000002" "84" "0014"
+ "8080211002000010810608080808830600000000"
+ "85" "0004"
+ "7f000101" /* gtphub's address towards SGSNs (Ctrl) */
+ "85" "0004"
+ "7f000102" /* gtphub's address towards SGSNs (User) */
+ "87" "0004" "00" "0b921f"
+ ;
+
+ /* Set the GGSN address that gtphub is forced to resolve to. */
+ OSMO_ASSERT(osmo_sockaddr_init_udp(&resolved_ggsn_addr,
+ "192.168.43.34", 434)
+ == 0);
+
+ struct osmo_sockaddr orig_sgsn_addr;
+ OSMO_ASSERT(osmo_sockaddr_init(&orig_sgsn_addr,
+ AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP,
+ "192.168.42.23", 423) == 0);
+ struct osmo_fd *ggsn_ofd = NULL;
+ struct osmo_sockaddr ggsn_addr;
+ int send;
+ send = gtphub_from_sgsns_handle_buf(hub, GTPH_PLANE_CTRL, &orig_sgsn_addr,
+ buf, msg(gtp_req_from_sgsn), now,
+ &ggsn_ofd, &ggsn_addr);
+ OSMO_ASSERT(send > 0);
+ OSMO_ASSERT(same_addr(&ggsn_addr, &resolved_ggsn_addr));
+ OSMO_ASSERT(msg_is(gtp_req_to_ggsn));
+
+ struct osmo_fd *sgsn_ofd;
+ struct osmo_sockaddr sgsn_addr;
+ send = gtphub_from_ggsns_handle_buf(hub, GTPH_PLANE_CTRL, &ggsn_addr,
+ buf, msg(gtp_resp_from_ggsn), now,
+ &sgsn_ofd, &sgsn_addr);
+ OSMO_ASSERT(send > 0);
+ OSMO_ASSERT(same_addr(&sgsn_addr, &orig_sgsn_addr));
+ OSMO_ASSERT(msg_is(gtp_resp_to_sgsn));
+
+ struct gtphub_peer_port *ggsn_port =
+ gtphub_port_find_sa(&hub->to_ggsns[GTPH_PLANE_CTRL],
+ &resolved_ggsn_addr);
+ OSMO_ASSERT(ggsn_port);
+ struct gtphub_peer *ggsn = ggsn_port->peer_addr->peer;
+ /* now == 345; now + 30 == 375.
+ * seq mapping from above:
+ * 0xabcd == 43981 (sent in the packet)
+ * 0x6d31 == 27953 (harcoded seq mapping start val) */
+ OSMO_ASSERT(nr_map_is(&ggsn->seq_map, "(43981->27953@375), "));
+
+ /* now == 345; now + (6 * 60 * 60) == 21600 + 345 == 21945.
+ * 0x00000321 == 801 (TEI from SGSN Ctrl)
+ * 0x00000123 == 291 (TEI from SGSN User)
+ * 0x00000765 == 1893 (TEI from GGSN Ctrl)
+ * 0x00000567 == 1383 (TEI from GGSN User)
+ * Mapped TEIs should be 1 and 2. */
+ OSMO_ASSERT(nr_map_is(&hub->tei_map[GTPH_PLANE_CTRL], "(801->1@21945), (1893->2@21945), "));
+ OSMO_ASSERT(nr_map_is(&hub->tei_map[GTPH_PLANE_USER], "(291->1@21945), (1383->2@21945), "));
+
+ gtphub_gc(hub, now + EXPIRE_ALL);
+}
+
+static struct log_info_cat gtphub_categories[] = {
+ [DGTPHUB] = {
+ .name = "DGTPHUB",
+ .description = "GTP Hub",
+ .color = "\033[1;33m",
+ .enabled = 1, .loglevel = LOGL_NOTICE,
+ },
+};
+
+static struct log_info info = {
+ .cat = gtphub_categories,
+ .num_cat = ARRAY_SIZE(gtphub_categories),
+};
+
+int main(int argc, char **argv)
+{
+ osmo_init_logging(&info);
+ osmo_gtphub_ctx = talloc_named_const(NULL, 0, "osmo_gtphub");
+
+ test_nr_map_basic();
+ test_expiry();
+ test_echo();
+ test_create_pdp_ctx();
+ printf("Done\n");
+
+ talloc_report_full(osmo_gtphub_ctx, stderr);
+ OSMO_ASSERT(talloc_total_blocks(osmo_gtphub_ctx) == 1);
+ return 0;
+}
+
diff --git a/openbsc/tests/gtphub/gtphub_test.ok b/openbsc/tests/gtphub/gtphub_test.ok
new file mode 100644
index 0000000..7be13fe
--- /dev/null
+++ b/openbsc/tests/gtphub/gtphub_test.ok
@@ -0,0 +1,3 @@
+Wrap: returning GGSN addr: 192.168.43.34 port 434
+Wrap: returning GGSN addr: 192.168.43.34 port 434
+Done
diff --git a/openbsc/tests/testsuite.at b/openbsc/tests/testsuite.at
index 78aa47e..6a1c77f 100644
--- a/openbsc/tests/testsuite.at
+++ b/openbsc/tests/testsuite.at
@@ -110,3 +110,10 @@
cat $abs_srcdir/oap/oap_test.ok > expout
AT_CHECK([$abs_top_builddir/tests/oap/oap_test], [], [expout], [ignore])
AT_CLEANUP
+
+AT_SETUP([gtphub])
+AT_KEYWORDS([gtphub])
+AT_CHECK([test "$enable_gtphub_test" != no || exit 77])
+cat $abs_srcdir/gtphub/gtphub_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/gtphub/gtphub_test], [], [expout], [ignore])
+AT_CLEANUP