/* Test the GTP hub */ /* (C) 2015 by sysmocom s.f.m.c. GmbH * All Rights Reserved * * Author: Neels Hofmeyr * * 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 . * */ #include #include #include #include #include #include #include #include #include #include #include #define ZERO_STRUCT(struct_pointer) memset(struct_pointer, '\0', \ sizeof(*(struct_pointer))) #define LVL2_ASSERT(exp) LVL2_ASSERT_R(exp, return 0) #define LVL2_ASSERT_R(exp, ret) \ if (!(exp)) { \ fprintf(stderr, "LVL2 Assert failed %s %s:%d\n", #exp, \ __FILE__, __LINE__); \ osmo_generate_backtrace(); \ ret; \ } /* Convenience makro, note: only within this C file. */ #define LOG(label) \ { fprintf(stderr, "\n" label "\n"); \ printf(label "\n"); } void gtphub_init(struct gtphub *hub); void gtphub_free(struct gtphub *hub); extern void *osmo_gtphub_ctx; 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, 1, 1000); 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_count(&map->mappings) == (i+1)); for (check_i = 0; check_i < i; check_i++) OSMO_ASSERT(m[check_i] != m[i]); } OSMO_ASSERT(llist_count(&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_count(&map->mappings) == (i2+1)); for (check_i = 0; check_i < i2; check_i++) OSMO_ASSERT(m[check_i] != m[i2]); } OSMO_ASSERT(llist_count(&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_count(&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, "(%u->%u@%d), ", m->orig, 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 int test_nr_map_wrap_with(nr_t nr_min, nr_t nr_max, nr_t repl_last, nr_t orig_start, int orig_n, const char *expect) { struct nr_pool _pool; struct nr_pool *pool = &_pool; struct nr_map _map; struct nr_map *map = &_map; nr_pool_init(pool, nr_min, nr_max); nr_map_init(map, pool, NULL); pool->last_nr = repl_last; void *origin = (void*)0x1234; int i; for (i = 0; i < orig_n; i++) LVL2_ASSERT(nr_map_have(map, origin, orig_start + i, 0)); LVL2_ASSERT(nr_map_is(map, expect)); nr_map_clear(map); return 1; } static void test_nr_map_wrap(void) { OSMO_ASSERT(test_nr_map_wrap_with( 0, UINT_MAX, UINT_MAX - 2, 1, 5, "(1->4294967294@0), " "(2->4294967295@0), " "(3->0@0), " "(4->1@0), " "(5->2@0), " )); OSMO_ASSERT(test_nr_map_wrap_with( 5, 10, 8, 1, 5, "(1->9@0), (2->10@0), (3->5@0), (4->6@0), (5->7@0), " )); } 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, 1, 1000); 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 } char resolve_ggsn_got_imsi[GSM23003_IMSI_MAX_DIGITS+1]; char resolve_ggsn_got_ni[APN_MAXLEN+1]; struct sgsn_sockaddr resolved_ggsn_addr; static int resolve_to_ggsn(const char *addr, uint16_t port) { LVL2_ASSERT(sgsn_sockaddr_init_udp(&resolved_ggsn_addr, addr, port) == 0); return 1; } struct sgsn_sockaddr resolved_sgsn_addr; static int resolve_to_sgsn(const char *addr, uint16_t port) { LVL2_ASSERT(sgsn_sockaddr_init_udp(&resolved_sgsn_addr, addr, port) == 0); return 1; } struct sgsn_sockaddr sgsn_sender; static int send_from_sgsn(const char *addr, uint16_t port) { LVL2_ASSERT(sgsn_sockaddr_init_udp(&sgsn_sender, addr, port) == 0); return 1; } struct sgsn_sockaddr ggsn_sender; static int send_from_ggsn(const char *addr, uint16_t port) { LVL2_ASSERT(sgsn_sockaddr_init_udp(&ggsn_sender, addr, port) == 0); return 1; } /* override, requires '-Wl,--wrap=gtphub_resolve_ggsn_addr' */ struct gtphub_peer_port *__real_gtphub_resolve_ggsn_addr(struct gtphub *hub, const char *imsi_str, const char *apn_ni_str); struct gtphub_peer_port *__wrap_gtphub_resolve_ggsn_addr(struct gtphub *hub, const char *imsi_str, const char *apn_ni_str) { struct gsn_addr resolved_gsna; uint16_t resolved_port; OSMO_ASSERT(gsn_addr_from_sockaddr(&resolved_gsna, &resolved_port, &resolved_ggsn_addr) == 0); struct gtphub_peer_port *pp; pp = gtphub_port_have(hub, &hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL], &resolved_gsna, resolved_port); printf("- __wrap_gtphub_resolve_ggsn_addr():\n" " returning GGSN addr from imsi %s ni %s: %s\n", imsi_str, apn_ni_str, gtphub_port_str(pp)); if (!imsi_str) imsi_str = "(null)"; osmo_strlcpy(resolve_ggsn_got_imsi, imsi_str, sizeof(resolve_ggsn_got_imsi)); if (!apn_ni_str) apn_ni_str = "(null)"; osmo_strlcpy(resolve_ggsn_got_ni, apn_ni_str, sizeof(resolve_ggsn_got_ni)); return pp; } #define was_resolved_for(IMSI,NI) _was_resolved_for(IMSI, NI, __FILE__, __LINE__) static int _was_resolved_for(const char *imsi, const char *ni, const char *file, int line) { int cmp0 = strncmp(imsi, resolve_ggsn_got_imsi, sizeof(resolve_ggsn_got_imsi)); if (cmp0 != 0) { printf("\n%s:%d: was_resolved_for(): MISMATCH for IMSI\n" " expecting: '%s'\n" " got: '%s'\n\n", file, line, imsi, resolve_ggsn_got_imsi); } int cmp1 = strncmp(ni, resolve_ggsn_got_ni, sizeof(resolve_ggsn_got_ni)); if (cmp1 != 0) { printf("\n%s:%d: was_resolved_for(): MISMATCH for NI\n" " expecting: '%s'\n" " got: '%s'\n\n", file, line, ni, resolve_ggsn_got_ni); } return (cmp0 == 0) && (cmp1 == 0); } /* override, requires '-Wl,--wrap=gtphub_ares_init' */ int __real_gtphub_ares_init(struct gtphub *hub); int __wrap_gtphub_ares_init(struct gtphub *hub) { /* Do nothing. */ return 0; } /* override, requires '-Wl,--wrap=gtphub_write' */ int __real_gtphub_write(const struct osmo_fd *to, const struct sgsn_sockaddr *to_addr, const uint8_t *buf, size_t buf_len); int __wrap_gtphub_write(const struct osmo_fd *to, const struct sgsn_sockaddr *to_addr, const uint8_t *buf, size_t buf_len) { printf("Out-of-band gtphub_write(%d):\n" "to %s\n" "%s\n", (int)buf_len, sgsn_sockaddr_to_str(to_addr), osmo_hexdump(buf, buf_len)); return 0; } #define buf_len 1024 static uint8_t buf[buf_len]; static uint8_t *reply_buf; 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 reply_is(MSG) _reply_is(MSG, __FILE__, __LINE__) static int _reply_is(const char *hex, const char *file, int line) { struct gtp1_header_long *h = (void*)reply_buf; int len = ntoh16(h->length) + 8; const char *dump = osmo_hexdump_nospc(reply_buf, len); int cmp = strcmp(dump, hex); OSMO_ASSERT(dump && hex); if (cmp != 0) { printf("\n%s:%d: reply_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 sgsn_sockaddr *got, const struct sgsn_sockaddr *expected, const char *file, int line) { int cmp = sgsn_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, sgsn_sockaddr_to_str(expected), sgsn_sockaddr_to_strb(got, buf, sizeof(buf))); return 0; } time_t now; static struct gtphub _hub; static struct gtphub *hub = &_hub; static int setup_test_hub(void) { /* Not really needed, but to make 100% sure... */ ZERO_STRUCT(hub); gtphub_init(hub); /* Tell this mock gtphub its local address for this test. */ LVL2_ASSERT(gsn_addr_from_str(&hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].local_addr, "127.0.1.1") == 0); LVL2_ASSERT(gsn_addr_from_str(&hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_USER].local_addr, "127.0.1.2") == 0); LVL2_ASSERT(gsn_addr_from_str(&hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].local_addr, "127.0.2.1") == 0); LVL2_ASSERT(gsn_addr_from_str(&hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_USER].local_addr, "127.0.2.2") == 0); hub->restart_counter = 0x23; now = 345; LVL2_ASSERT(send_from_sgsn("192.168.42.23", 423)); LVL2_ASSERT(resolve_to_ggsn("192.168.43.34", 2123)); LVL2_ASSERT(send_from_ggsn("192.168.43.34", 434)); LVL2_ASSERT(resolve_to_sgsn("192.168.42.23", 2123)); #define GGSNS_CTRL_FD 1 #define GGSNS_USER_FD 2 #define SGSNS_CTRL_FD 3 #define SGSNS_USER_FD 4 hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].ofd.priv_nr = GGSNS_CTRL_FD; hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_USER].ofd.priv_nr = GGSNS_USER_FD; hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].ofd.priv_nr = SGSNS_CTRL_FD; hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_USER].ofd.priv_nr = SGSNS_USER_FD; return 1; } static int clear_test_hub(void) { /* expire all */ gtphub_gc(hub, now + (60 * GTPH_EXPIRE_SLOWLY_MINUTES) + 1); int plane_idx; plane_idx = GTPH_PLANE_CTRL; LVL2_ASSERT(llist_empty(&hub->to_gsns[GTPH_SIDE_GGSN][plane_idx].peers)); LVL2_ASSERT(llist_empty(&hub->to_gsns[GTPH_SIDE_SGSN][plane_idx].peers)); plane_idx = GTPH_PLANE_USER; LVL2_ASSERT(llist_empty(&hub->to_gsns[GTPH_SIDE_GGSN][plane_idx].peers)); LVL2_ASSERT(llist_empty(&hub->to_gsns[GTPH_SIDE_SGSN][plane_idx].peers)); LVL2_ASSERT(llist_empty(&hub->tunnels)); LVL2_ASSERT(llist_empty(&hub->pending_deletes)); LVL2_ASSERT(llist_empty(&hub->ggsn_lookups)); LVL2_ASSERT(llist_empty(&hub->resolved_ggsns)); gtphub_free(hub); return 1; } static int tunnels_are(const char *expect) { static char buf[4096]; char *pos = buf; size_t len = sizeof(buf); struct gtphub_tunnel *t; llist_for_each_entry(t, &hub->tunnels, entry) { size_t wrote = snprintf(pos, len, "%s @%d\n", gtphub_tunnel_str(t), (int)t->expiry_entry.expiry); LVL2_ASSERT(wrote < len); pos += wrote; len -= wrote; } *pos = '\0'; if (strncmp(buf, expect, sizeof(buf)) != 0) { fprintf(stderr, "FAILURE: tunnels_are() mismatches expected value:\n" "EXPECTED:\n%s\n" "IS:\n%s\n", expect, buf); LVL2_ASSERT("tunnels do not match expected listing."); return 0; } return 1; } static void test_echo(void) { LOG("test_echo"); OSMO_ASSERT(setup_test_hub()); now = 123; struct osmo_fd *to_ofd; struct sgsn_sockaddr to_addr; struct gtphub_peer_port *pp; int send; 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 2 octet sequence nr */ "0000" /* N-PDU 0, no extension header (why is this here?) */ ; const char *gtp_pong_to_sgsn = "32" "02" /* type 02: Echo response */ "0006" /* length of 6 after header TEI */ "00000000" /* header TEI == 0 in Echo */ "abcd" /* same sequence nr */ "0000" "0e23" /* Recovery with restart counter */ ; to_ofd = NULL; ZERO_STRUCT(&to_addr); send = gtphub_handle_buf(hub, GTPH_SIDE_SGSN, GTPH_PLANE_CTRL, &sgsn_sender, buf, msg(gtp_ping_from_sgsn), now, &reply_buf, &to_ofd, &to_addr); OSMO_ASSERT(send > 0); OSMO_ASSERT(to_addr.l); OSMO_ASSERT(same_addr(&to_addr, &sgsn_sender)); OSMO_ASSERT(to_ofd && (to_ofd->priv_nr == SGSNS_CTRL_FD)); OSMO_ASSERT(reply_is(gtp_pong_to_sgsn)); pp = gtphub_port_find_sa(&hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL], &sgsn_sender); /* We don't record Echo peers. */ OSMO_ASSERT(!pp); const char *gtp_ping_from_ggsn = "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 */ "cdef" /* some 2 octet sequence nr */ "0000" /* N-PDU 0, no extension header (why is this here?) */ ; const char *gtp_pong_to_ggsn = "32" "02" /* type 02: Echo response */ "0006" /* length of 6 after header TEI */ "00000000" /* header TEI == 0 in Echo */ "cdef" /* same sequence nr */ "0000" "0e23" /* Recovery with restart counter */ ; to_ofd = NULL; ZERO_STRUCT(&to_addr); send = gtphub_handle_buf(hub, GTPH_SIDE_GGSN, GTPH_PLANE_CTRL, &ggsn_sender, buf, msg(gtp_ping_from_ggsn), now, &reply_buf, &to_ofd, &to_addr); OSMO_ASSERT(send > 0); OSMO_ASSERT(same_addr(&to_addr, &ggsn_sender)); OSMO_ASSERT(to_ofd && (to_ofd->priv_nr == GGSNS_CTRL_FD)); OSMO_ASSERT(reply_is(gtp_pong_to_ggsn)); pp = gtphub_port_find_sa(&hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL], &sgsn_sender); OSMO_ASSERT(!pp); /* And all the same on the user plane. */ to_ofd = NULL; ZERO_STRUCT(&to_addr); send = gtphub_handle_buf(hub, GTPH_SIDE_SGSN, GTPH_PLANE_USER, &sgsn_sender, buf, msg(gtp_ping_from_sgsn), now, &reply_buf, &to_ofd, &to_addr); OSMO_ASSERT(send > 0); OSMO_ASSERT(to_addr.l); OSMO_ASSERT(same_addr(&to_addr, &sgsn_sender)); OSMO_ASSERT(to_ofd && (to_ofd->priv_nr == SGSNS_USER_FD)); OSMO_ASSERT(reply_is(gtp_pong_to_sgsn)); pp = gtphub_port_find_sa(&hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_USER], &sgsn_sender); OSMO_ASSERT(!pp); to_ofd = NULL; ZERO_STRUCT(&to_addr); send = gtphub_handle_buf(hub, GTPH_SIDE_GGSN, GTPH_PLANE_USER, &ggsn_sender, buf, msg(gtp_ping_from_ggsn), now, &reply_buf, &to_ofd, &to_addr); OSMO_ASSERT(send > 0); OSMO_ASSERT(same_addr(&to_addr, &ggsn_sender)); OSMO_ASSERT(to_ofd && (to_ofd->priv_nr == GGSNS_USER_FD)); OSMO_ASSERT(reply_is(gtp_pong_to_ggsn)); pp = gtphub_port_find_sa(&hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_USER], &sgsn_sender); OSMO_ASSERT(!pp); OSMO_ASSERT(clear_test_hub()); } #define MSG_PDP_CTX_REQ(len, seq, restart, imsi, tei_u, tei_c, apn, gsn_c, gsn_u) \ "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr. */ \ "10" /* type 16: Create PDP Context Request */ \ len /* msg length = 8 + len (2 octets) */ \ "00000000" /* No TEI yet */ \ seq /* Sequence nr (2 octets) */ \ "00" /* N-PDU 0 */ \ "00" /* No extensions */ \ /* IEs */ \ "0e" restart /* 14: Recovery (restart counter: 1 octet) */ \ "02" /* 2 = IMSI */ \ imsi /* (8 octets) */ \ "0f01" /* 15: Selection mode = MS provided APN, subscription not verified*/ \ "10" /* 16: TEI Data I */ \ tei_u /* (4 octets) */ \ "11" /* 17: TEI Control Plane */ \ tei_c /* (4 octets) */ \ "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 */ \ apn /* (2 octets length, N octets encoded APN-NI) */ \ "84" /* 132: Protocol Configuration Options */ \ "0015" /* length = 21 */ \ "80c0231101010011036d69670868656d6d656c6967" \ "85" /* 133: GSN Address */ \ gsn_c /* (2 octets length, N octets addr) */ \ "85" /* 133: GSN Address (second entry) */ \ gsn_u /* (2 octets length, N octets addr) */ \ "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 */ #define MSG_PDP_CTX_RSP(len, tei_h, seq, restart, tei_u, tei_c, gsn_c, gsn_u) \ "32" \ "11" /* Create PDP Context Response */ \ len /* msg length = 8 + len (2 octets) */ \ tei_h /* destination TEI (sent in req above) */ \ seq /* mapped seq */ \ "00" "00" \ /* IEs */ \ "01" /* 1: Cause */ \ "80" /* value = 0b10000000 = response, no rejection. */ \ "08" /* 8: Reordering Required */ \ "00" /* not required. */ \ "0e" restart /* 14: Recovery */ \ "10" /* 16: TEI Data I */ \ tei_u \ "11" /* 17: TEI Control */ \ tei_c \ "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) */ \ gsn_c \ "85" /* 133: GSN Address (User) */ \ gsn_u \ "87" /* 135: Quality of Service (QoS) Profile */ \ "0004" /* length */ \ "00" /* priority */ \ "0b921f" /* QoS profile data */ #define msg_from_sgsn_c(A,B,C,D) msg_from_sgsn(GTPH_PLANE_CTRL, A,B,C,D) #define msg_from_sgsn_u(A,B,C,D) msg_from_sgsn(GTPH_PLANE_USER, A,B,C,D) static int msg_from_sgsn(int plane_idx, struct sgsn_sockaddr *_sgsn_sender, struct sgsn_sockaddr *ggsn_receiver, const char *hex_from_sgsn, const char *hex_to_ggsn) { struct osmo_fd *ggsn_ofd = NULL; struct sgsn_sockaddr ggsn_addr; int send; send = gtphub_handle_buf(hub, GTPH_SIDE_SGSN, plane_idx, _sgsn_sender, buf, msg(hex_from_sgsn), now, &reply_buf, &ggsn_ofd, &ggsn_addr); LVL2_ASSERT(send > 0); LVL2_ASSERT(same_addr(&ggsn_addr, ggsn_receiver)); LVL2_ASSERT(reply_is(hex_to_ggsn)); return 1; } #define msg_from_ggsn_c(A,B,C,D) msg_from_ggsn(GTPH_PLANE_CTRL, A,B,C,D) #define msg_from_ggsn_u(A,B,C,D) msg_from_ggsn(GTPH_PLANE_USER, A,B,C,D) static int msg_from_ggsn(int plane_idx, struct sgsn_sockaddr *ggsn_sender, struct sgsn_sockaddr *sgsn_receiver, const char *msg_from_ggsn, const char *msg_to_sgsn) { struct osmo_fd *sgsn_ofd; struct sgsn_sockaddr sgsn_addr; int send; send = gtphub_handle_buf(hub, GTPH_SIDE_GGSN, plane_idx, ggsn_sender, buf, msg(msg_from_ggsn), now, &reply_buf, &sgsn_ofd, &sgsn_addr); if (*msg_to_sgsn) { LVL2_ASSERT(send > 0); LVL2_ASSERT(same_addr(&sgsn_addr, sgsn_receiver)); LVL2_ASSERT(reply_is(msg_to_sgsn)); } else LVL2_ASSERT(send == 0); return 1; } static int create_pdp_ctx(void) { const char *gtp_req_from_sgsn = MSG_PDP_CTX_REQ("0068", "abcd", "60", "42000121436587f9", "00000123", "00000321", "0009""08696e7465726e6574", /* "(8)internet" */ "0004""c0a82a17", /* same as default sgsn_sender */ "0004""c0a82a17" ); const char *gtp_req_to_ggsn = MSG_PDP_CTX_REQ("0068", "6d31", /* mapped seq ("abcd") */ "23", "42000121436587f9", "00000001", /* Data I: tunnel's TEI */ "00000001", /* Control: tunnel's TEI */ "0009""08696e7465726e6574", "0004""7f000201", /* replaced with gtphub's ggsn ctrl */ "0004""7f000202" /* replaced with gtphub's ggsn user */ ); LVL2_ASSERT(msg_from_sgsn_c(&sgsn_sender, &resolved_ggsn_addr, gtp_req_from_sgsn, gtp_req_to_ggsn)); LVL2_ASSERT(was_resolved_for("240010123456789", "internet")); LVL2_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21945\n")); const char *gtp_resp_from_ggsn = MSG_PDP_CTX_RSP("004e", "00000001", /* destination TEI (sent in req above) */ "6d31", /* mapped seq */ "01", /* restart */ "00000567", /* TEI U */ "00000765", /* TEI C */ "0004""c0a82b22", /* GSN addresses */ "0004""c0a82b22" /* (== resolved_ggsn_addr) */ ); const char *gtp_resp_to_sgsn = MSG_PDP_CTX_RSP("004e", "00000321", /* unmapped TEI ("001") */ "abcd", /* unmapped seq ("6d31") */ "23", "00000001", /* mapped TEI from GGSN ("567") */ "00000001", /* mapped TEI from GGSN ("765") */ "0004""7f000101", /* gtphub's address towards SGSNs (Ctrl) */ "0004""7f000102" /* gtphub's address towards SGSNs (User) */ ); /* The response should go back to whichever port the request came from * (unmapped by sequence nr) */ LVL2_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_resp_from_ggsn, gtp_resp_to_sgsn)); return 1; } #define MSG_DEL_PDP_CTX_REQ(tei, seq) \ "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr. */ \ "14" /* type 20: Delete PDP Context Request */ \ "0008" /* msg length = 8 + len (2 octets) */ \ tei /* TEI Ctrl */ \ seq /* Sequence nr (2 octets) */ \ "00" /* N-PDU 0 */ \ "00" /* No extensions */ \ /* IEs */ \ "13fe" /* 19: Teardown ind = 0 */ \ "1400" /* 20: NSAPI = 0*/ \ #define MSG_DEL_PDP_CTX_RSP(tei, seq) \ "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr. */ \ "15" /* type 21: Delete PDP Context Response */ \ "0006" /* msg length = 8 + len (2 octets) */ \ tei /* TEI Ctrl */ \ seq /* Sequence nr (2 octets) */ \ "00" /* N-PDU 0 */ \ "00" /* No extensions */ \ /* IEs */ \ "01" /* 1: Cause */ \ "80" /* value = 0b10000000 = response, no rejection. */ \ static int delete_pdp_ctx_from_sgsn(void) { now += GTPH_EXPIRE_QUICKLY_SECS + 1; gtphub_gc(hub, now); LVL2_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21945\n")); /* TEI Ctrl from above and next sequence after abcd. */ const char *gtp_req_from_sgsn = MSG_DEL_PDP_CTX_REQ("00000001", "abce"); const char *gtp_req_to_ggsn = MSG_DEL_PDP_CTX_REQ("00000765", "6d32"); LVL2_ASSERT(msg_from_sgsn_c(&sgsn_sender, &resolved_ggsn_addr, gtp_req_from_sgsn, gtp_req_to_ggsn)); /* 21945 + 31 = 21976 */ LVL2_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21976\n")); const char *gtp_resp_from_ggsn = MSG_DEL_PDP_CTX_RSP("00000001", "6d32"); const char *gtp_resp_to_sgsn = MSG_DEL_PDP_CTX_RSP("00000321", "abce"); /* The response should go back to whichever port the request came from * (unmapped by sequence nr) */ LVL2_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_resp_from_ggsn, gtp_resp_to_sgsn)); LVL2_ASSERT(tunnels_are("")); return 1; } static int delete_pdp_ctx_from_ggsn(void) { now += GTPH_EXPIRE_QUICKLY_SECS + 1; gtphub_gc(hub, now); LVL2_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21945\n")); /* TEI Ctrl from above and next sequence after abcd. */ const char *gtp_req_from_ggsn = MSG_DEL_PDP_CTX_REQ("00000001", "5432"); const char *gtp_req_to_sgsn = MSG_DEL_PDP_CTX_REQ("00000321", "6d31"); LVL2_ASSERT(msg_from_ggsn_c(&ggsn_sender, &resolved_sgsn_addr, gtp_req_from_ggsn, gtp_req_to_sgsn)); /* 21945 + 31 = 21976 */ LVL2_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21976\n")); const char *gtp_resp_from_sgsn = MSG_DEL_PDP_CTX_RSP("00000001", "6d31"); const char *gtp_resp_to_ggsn = MSG_DEL_PDP_CTX_RSP("00000765", "5432"); /* The response should go back to whichever port the request came from * (unmapped by sequence nr) */ LVL2_ASSERT(msg_from_sgsn_c(&resolved_sgsn_addr, &ggsn_sender, gtp_resp_from_sgsn, gtp_resp_to_ggsn)); LVL2_ASSERT(tunnels_are("")); return 1; } static void test_one_pdp_ctx(int del_from_side) { if (del_from_side == GTPH_SIDE_SGSN) LOG("test_one_pdp_ctx (del from SGSN)") else LOG("test_one_pdp_ctx (del from GGSN)"); OSMO_ASSERT(setup_test_hub()); OSMO_ASSERT(create_pdp_ctx()); struct gtphub_peer_port *ggsn_port = gtphub_port_find_sa(&hub->to_gsns[GTPH_SIDE_GGSN][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(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21945\n")); if (del_from_side == GTPH_SIDE_SGSN) { OSMO_ASSERT(delete_pdp_ctx_from_sgsn()); } else { OSMO_ASSERT(delete_pdp_ctx_from_ggsn()); } OSMO_ASSERT(tunnels_are("")); OSMO_ASSERT(clear_test_hub()); } static void test_user_data(void) { LOG("test_user_data"); OSMO_ASSERT(setup_test_hub()); OSMO_ASSERT(create_pdp_ctx()); /* now == 345; now + (6 * 60 * 60) == 21600 + 345 == 21945. */ OSMO_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21945\n")); LOG("- user data starts"); /* Now expect default port numbers for User plane. */ resolve_to_ggsn("192.168.43.34", 2152); resolve_to_sgsn("192.168.42.23", 2152); /* 10 minutes later */ now += 600; const char *u_from_ggsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000001" /* mapped TEI for SGSN from create_pdp_ctx() */ "0070" /* seq */ "0000" /* No extensions */ /* User data (ICMP packet), 96 - 12 = 84 octets */ "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; const char *u_to_sgsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000123" /* unmapped User TEI */ "6d31" /* new mapped seq */ "0000" "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; /* This depends on create_pdp_ctx() sending resolved_sgsn_addr as GSN * Address IEs in the GGSN's Create PDP Ctx Response. */ OSMO_ASSERT(msg_from_ggsn_u(&ggsn_sender, &resolved_sgsn_addr, u_from_ggsn, u_to_sgsn)); /* Make sure the user plane messages have refreshed the TEI mapping * timeouts: 21945 + 600 == 22545. */ OSMO_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @22545\n")); const char *u_from_sgsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000001" /* mapped User TEI for GGSN from create_pdp_ctx() */ "1234" /* unknown seq */ "0000" /* No extensions */ /* User data (ICMP packet), 96 - 12 = 84 octets */ "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; const char *u_to_ggsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000567" /* unmapped User TEI */ "6d31" /* unmapped seq */ "0000" "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; OSMO_ASSERT(msg_from_sgsn_u(&sgsn_sender, &resolved_ggsn_addr, u_from_sgsn, u_to_ggsn)); /* Make sure the user plane messages have refreshed the TEI mapping * timeouts: 21945 + 600 == 22545. Both timeouts refreshed: */ OSMO_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @22545\n")); OSMO_ASSERT(clear_test_hub()); } static void test_reused_tei(void) { LOG("test_reused_tei"); OSMO_ASSERT(setup_test_hub()); OSMO_ASSERT(create_pdp_ctx()); const char *gtp_req_from_sgsn = MSG_PDP_CTX_REQ("0068", "abce", /* Next seq */ "60", "42000121436587f9", "00000123", /* Same TEIs as before */ "00000321", "0009""08696e7465726e6574", /* "(8)internet" */ "0004""c0a82a17", /* same as default sgsn_sender */ "0004""c0a82a17" ); const char *gtp_req_to_ggsn = MSG_PDP_CTX_REQ("0068", "6d32", /* mapped seq ("abce") */ "23", "42000121436587f9", "00000002", /* mapped TEI Data I ("123") */ "00000002", /* mapped TEI Control ("321") */ "0009""08696e7465726e6574", "0004""7f000201", /* replaced with gtphub's ggsn ctrl */ "0004""7f000202" /* replaced with gtphub's ggsn user */ ); OSMO_ASSERT(msg_from_sgsn_c(&sgsn_sender, &resolved_ggsn_addr, gtp_req_from_sgsn, gtp_req_to_ggsn)); OSMO_ASSERT(was_resolved_for("240010123456789", "internet")); OSMO_ASSERT(tunnels_are( "TEI=2:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21945\n")); const char *gtp_resp_from_ggsn = MSG_PDP_CTX_RSP("004e", "00000002", /* destination TEI (sent in req above) */ "6d32", /* mapped seq */ "01", /* restart */ "00000567", /* TEI U */ "00000765", /* TEI C */ "0004""c0a82b22", /* GSN addresses */ "0004""c0a82b22" /* (== resolved_ggsn_addr) */ ); const char *gtp_resp_to_sgsn = MSG_PDP_CTX_RSP("004e", "00000321", /* unmapped TEI ("001") */ "abce", /* unmapped seq ("6d32") */ "23", "00000002", /* mapped TEI from GGSN ("567") */ "00000002", /* mapped TEI from GGSN ("765") */ "0004""7f000101", /* gtphub's address towards SGSNs (Ctrl) */ "0004""7f000102" /* gtphub's address towards SGSNs (User) */ ); /* The response should go back to whichever port the request came from * (unmapped by sequence nr) */ OSMO_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_resp_from_ggsn, gtp_resp_to_sgsn)); OSMO_ASSERT(clear_test_hub()); } static void test_peer_restarted(void) { LOG("test_peer_restarted"); OSMO_ASSERT(setup_test_hub()); OSMO_ASSERT(create_pdp_ctx()); now += 10; const char *gtp_req_from_sgsn = MSG_PDP_CTX_REQ("0068", "1234", /* brand new seq */ "61", /* DIFFERING restart counter */ "42000121436587f9", "00000abc", "00000cba", "0009""08696e7465726e6574", /* "(8)internet" */ "0004""c0a82a17", /* same as default sgsn_sender */ "0004""c0a82a17" ); const char *gtp_req_to_ggsn = MSG_PDP_CTX_REQ("0068", "6d33", /* mapped seq ("1234") */ "23", "42000121436587f9", "00000002", /* mapped TEI Data I ("123") */ "00000002", /* mapped TEI Control ("321") */ "0009""08696e7465726e6574", "0004""7f000201", /* replaced with gtphub's ggsn ctrl */ "0004""7f000202" /* replaced with gtphub's ggsn user */ ); OSMO_ASSERT(msg_from_sgsn_c(&sgsn_sender, &resolved_ggsn_addr, gtp_req_from_sgsn, gtp_req_to_ggsn)); OSMO_ASSERT(was_resolved_for("240010123456789", "internet")); OSMO_ASSERT(tunnels_are( "TEI=2:" " 192.168.42.23 (TEI C=cba U=abc)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21955\n" "TEI=1:" " (uninitialized) (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21945\n" )); const char *gtp_resp_from_ggsn = MSG_PDP_CTX_RSP("004e", "00000002", /* destination TEI (sent in req above) */ "6d33", /* mapped seq */ "01", /* restart */ "00000def", /* TEI U */ "00000fde", /* TEI C */ "0004""c0a82b22", /* GSN addresses */ "0004""c0a82b22" /* (== resolved_ggsn_addr) */ ); const char *gtp_resp_to_sgsn = MSG_PDP_CTX_RSP("004e", "00000cba", /* unmapped TEI ("005") */ "1234", /* unmapped seq ("6d32") */ "23", "00000002", /* mapped TEI from GGSN ("567") */ "00000002", /* mapped TEI from GGSN ("765") */ "0004""7f000101", /* gtphub's address towards SGSNs (Ctrl) */ "0004""7f000102" /* gtphub's address towards SGSNs (User) */ ); /* The response should go back to whichever port the request came from * (unmapped by sequence nr) */ OSMO_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_resp_from_ggsn, gtp_resp_to_sgsn)); OSMO_ASSERT(clear_test_hub()); } static void test_peer_restarted_reusing_tei(void) { LOG("test_peer_restarted_reusing_tei"); OSMO_ASSERT(setup_test_hub()); OSMO_ASSERT(create_pdp_ctx()); now += 10; const char *gtp_req_from_sgsn = MSG_PDP_CTX_REQ("0068", "1234", /* brand new seq */ "61", /* DIFFERING restart counter */ "42000121436587f9", "00000123", /* SAME TEI */ "00000321", "0009""08696e7465726e6574", /* "(8)internet" */ "0004""c0a82a17", /* same as default sgsn_sender */ "0004""c0a82a17" ); const char *gtp_req_to_ggsn = MSG_PDP_CTX_REQ("0068", "6d33", /* seq 6d31 + 2, after "out-of-band" Delete PDP Ctx due to differing restart counter. */ "23", "42000121436587f9", "00000002", /* mapped TEI Data I ("123") */ "00000002", /* mapped TEI Control ("321") */ "0009""08696e7465726e6574", "0004""7f000201", /* replaced with gtphub's ggsn ctrl */ "0004""7f000202" /* replaced with gtphub's ggsn user */ ); OSMO_ASSERT(msg_from_sgsn_c(&sgsn_sender, &resolved_ggsn_addr, gtp_req_from_sgsn, gtp_req_to_ggsn)); OSMO_ASSERT(was_resolved_for("240010123456789", "internet")); OSMO_ASSERT(tunnels_are( "TEI=2:" /* being established after restart */ " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21955\n" "TEI=1:" /* invalidated due to restart */ " (uninitialized) (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21945\n" )); /* An "out-of-band" delete request should have been sent to the GGSN * (checked by expected log output in gtphub_test.ok), and the GGSN * will (usually) send a Delete Response like this: */ const char *gtp_del_resp_from_ggsn = MSG_DEL_PDP_CTX_RSP("00000001", "6d32"); /* For this response (due to peer restart) we expect no forwarded * message. */ OSMO_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_del_resp_from_ggsn, "")); OSMO_ASSERT(tunnels_are( "TEI=2:" /* still being established after restart */ " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21955\n" )); const char *gtp_resp_from_ggsn = MSG_PDP_CTX_RSP("004e", "00000002", /* destination TEI (sent in req above) */ "6d33", /* mapped seq */ "01", /* restart */ "00000def", /* TEI U */ "00000fde", /* TEI C */ "0004""c0a82b22", /* GSN addresses */ "0004""c0a82b22" /* (== resolved_ggsn_addr) */ ); const char *gtp_resp_to_sgsn = MSG_PDP_CTX_RSP("004e", "00000321", /* unmapped TEI ("005") */ "1234", /* unmapped seq ("6d33") */ "23", "00000002", /* mapped TEI from GGSN ("567") */ "00000002", /* mapped TEI from GGSN ("765") */ "0004""7f000101", /* gtphub's address towards SGSNs (Ctrl) */ "0004""7f000102" /* gtphub's address towards SGSNs (User) */ ); /* The response should go back to whichever port the request came from * (unmapped by sequence nr) */ OSMO_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_resp_from_ggsn, gtp_resp_to_sgsn)); OSMO_ASSERT(tunnels_are( "TEI=2:" /* still being established after restart */ " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=fde U=def)" " @21955\n" )); OSMO_ASSERT(clear_test_hub()); } static void test_sgsn_behind_nat(void) { LOG("test_user_data"); OSMO_ASSERT(setup_test_hub()); hub->sgsn_use_sender = 1; /* <-- Main difference to test_user_data() */ resolve_to_sgsn("192.168.42.23", 423); /* Same as sender */ OSMO_ASSERT(create_pdp_ctx()); /* now == 345; now + (6 * 60 * 60) == 21600 + 345 == 21945. */ OSMO_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21945\n")); LOG("- user data starts"); /* Now expect default port numbers for User plane -- except SGSN. */ resolve_to_ggsn("192.168.43.34", 2152); /* 10 minutes later */ now += 600; const char *u_from_ggsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000001" /* mapped User TEI for SGSN from create_pdp_ctx() */ "0070" /* seq */ "0000" /* No extensions */ /* User data (ICMP packet), 96 - 12 = 84 octets */ "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; const char *u_to_sgsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000123" /* unmapped User TEI */ "6d31" /* new mapped seq */ "0000" "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; /* This depends on create_pdp_ctx() sending resolved_sgsn_addr as GSN * Address IEs in the GGSN's Create PDP Ctx Response. */ OSMO_ASSERT(msg_from_ggsn_u(&ggsn_sender, &resolved_sgsn_addr, u_from_ggsn, u_to_sgsn)); /* Make sure the user plane messages have refreshed the TEI mapping * timeouts: 21945 + 600 == 22545. */ OSMO_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @22545\n")); const char *u_from_sgsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000001" /* mapped User TEI for GGSN from create_pdp_ctx() */ "1234" /* unknown seq */ "0000" /* No extensions */ /* User data (ICMP packet), 96 - 12 = 84 octets */ "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; const char *u_to_ggsn = "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr */ "ff" /* type 255: G-PDU */ "0058" /* length: 88 + 8 octets == 96 */ "00000567" /* unmapped User TEI */ "6d31" /* unmapped seq */ "0000" "45000054daee40004001f7890a172a010a172a02080060d23f590071e3f8" "4156000000007241010000000000101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f3031323334353637" ; OSMO_ASSERT(msg_from_sgsn_u(&sgsn_sender, &resolved_ggsn_addr, u_from_sgsn, u_to_ggsn)); /* Make sure the user plane messages have refreshed the TEI mapping * timeouts: 21945 + 600 == 22545. Both timeouts refreshed: */ OSMO_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @22545\n")); OSMO_ASSERT(clear_test_hub()); } void test_parallel_context_creation(void) { LOG("test_parallel_context_creation"); OSMO_ASSERT(setup_test_hub()); const char *gtp_req_from_sgsn1 = MSG_PDP_CTX_REQ("0068", "abcd", "60", "42000121436587f9", "00000123", "00000321", "0009""08696e7465726e6574", /* "(8)internet" */ "0004""c0a82a17", /* same as default sgsn_sender */ "0004""c0a82a17" ); const char *gtp_req_to_ggsn1 = MSG_PDP_CTX_REQ("0068", "6d31", /* mapped seq ("abcd") */ "23", "42000121436587f9", "00000001", /* mapped TEI Data I ("123") */ "00000001", /* mapped TEI Control ("321") */ "0009""08696e7465726e6574", "0004""7f000201", /* replaced with gtphub's ggsn ctrl */ "0004""7f000202" /* replaced with gtphub's ggsn user */ ); OSMO_ASSERT(msg_from_sgsn_c(&sgsn_sender, &resolved_ggsn_addr, gtp_req_from_sgsn1, gtp_req_to_ggsn1)); OSMO_ASSERT(tunnels_are( "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21945\n")); now ++; const char *gtp_req_from_sgsn2 = MSG_PDP_CTX_REQ("0068", "abce", "60", "42000121436588f9", "00000124", "00000322", "0009""08696e7465726e6574", /* "(8)internet" */ "0004""c0a82a17", /* same as default sgsn_sender */ "0004""c0a82a17" ); const char *gtp_req_to_ggsn2 = MSG_PDP_CTX_REQ("0068", "6d32", /* mapped seq ("abce") */ "23", "42000121436588f9", "00000002", /* mapped TEI Data I ("124") */ "00000002", /* mapped TEI Control ("322") */ "0009""08696e7465726e6574", "0004""7f000201", /* replaced with gtphub's ggsn ctrl */ "0004""7f000202" /* replaced with gtphub's ggsn user */ ); OSMO_ASSERT(msg_from_sgsn_c(&sgsn_sender, &resolved_ggsn_addr, gtp_req_from_sgsn2, gtp_req_to_ggsn2)); OSMO_ASSERT(tunnels_are( "TEI=2:" " 192.168.42.23 (TEI C=322 U=124)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21946\n" "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21945\n" )); now ++; const char *gtp_resp_from_ggsn1 = MSG_PDP_CTX_RSP("004e", "00000001", /* destination TEI (sent in req above) */ "6d31", /* mapped seq */ "01", /* restart */ "00000567", /* TEI U */ "00000765", /* TEI C */ "0004""c0a82b22", /* GSN addresses */ "0004""c0a82b22" /* (== resolved_ggsn_addr) */ ); const char *gtp_resp_to_sgsn1 = MSG_PDP_CTX_RSP("004e", "00000321", /* unmapped TEI ("001") */ "abcd", /* unmapped seq ("6d31") */ "23", "00000001", /* mapped TEI from GGSN ("567") */ "00000001", /* mapped TEI from GGSN ("765") */ "0004""7f000101", /* gtphub's address towards SGSNs (Ctrl) */ "0004""7f000102" /* gtphub's address towards SGSNs (User) */ ); OSMO_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_resp_from_ggsn1, gtp_resp_to_sgsn1)); OSMO_ASSERT(tunnels_are( "TEI=2:" " 192.168.42.23 (TEI C=322 U=124)" " <-> 192.168.43.34/(uninitialized) (TEI C=0 U=0)" " @21946\n" "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21947\n" )); now ++; const char *gtp_resp_from_ggsn2 = MSG_PDP_CTX_RSP("004e", "00000002", /* destination TEI (sent in req above) */ "6d32", /* mapped seq */ "01", /* restart */ "00000568", /* TEI U */ "00000766", /* TEI C */ "0004""c0a82b22", /* GSN addresses */ "0004""c0a82b22" /* (== resolved_ggsn_addr) */ ); const char *gtp_resp_to_sgsn2 = MSG_PDP_CTX_RSP("004e", "00000322", /* unmapped TEI ("001") */ "abce", /* unmapped seq ("6d31") */ "23", "00000002", /* mapped TEI from GGSN ("567") */ "00000002", /* mapped TEI from GGSN ("765") */ "0004""7f000101", /* gtphub's address towards SGSNs (Ctrl) */ "0004""7f000102" /* gtphub's address towards SGSNs (User) */ ); OSMO_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr, &sgsn_sender, gtp_resp_from_ggsn2, gtp_resp_to_sgsn2)); OSMO_ASSERT(tunnels_are( "TEI=2:" " 192.168.42.23 (TEI C=322 U=124)" " <-> 192.168.43.34 (TEI C=766 U=568)" " @21948\n" "TEI=1:" " 192.168.42.23 (TEI C=321 U=123)" " <-> 192.168.43.34 (TEI C=765 U=567)" " @21947\n" )); OSMO_ASSERT(clear_test_hub()); } static struct log_info_cat gtphub_categories[] = { [DGTPHUB] = { .name = "DGTPHUB", .description = "GTP Hub", .color = "\033[1;33m", .enabled = 1, .loglevel = LOGL_DEBUG, }, }; static struct log_info info = { .cat = gtphub_categories, .num_cat = ARRAY_SIZE(gtphub_categories), }; int main(int argc, char **argv) { osmo_gtphub_ctx = talloc_named_const(NULL, 0, "osmo_gtphub"); void *log_ctx = talloc_named_const(osmo_gtphub_ctx, 0, "log"); osmo_init_logging2(log_ctx, &info); test_nr_map_basic(); test_nr_map_wrap(); test_expiry(); test_echo(); test_one_pdp_ctx(GTPH_SIDE_SGSN); test_one_pdp_ctx(GTPH_SIDE_GGSN); test_user_data(); test_reused_tei(); test_peer_restarted(); test_peer_restarted_reusing_tei(); test_sgsn_behind_nat(); test_parallel_context_creation(); printf("Done\n"); talloc_report_full(osmo_gtphub_ctx, stderr); talloc_free(log_ctx); OSMO_ASSERT(talloc_total_blocks(osmo_gtphub_ctx) == 1); talloc_free(osmo_gtphub_ctx); return 0; }