diff options
Diffstat (limited to 'tests/gtphub/gtphub_test.c')
| -rw-r--r-- | tests/gtphub/gtphub_test.c | 1786 |
1 files changed, 1786 insertions, 0 deletions
diff --git a/tests/gtphub/gtphub_test.c b/tests/gtphub/gtphub_test.c new file mode 100644 index 000000000..e7c27d2cb --- /dev/null +++ b/tests/gtphub/gtphub_test.c @@ -0,0 +1,1786 @@ +/* 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/application.h> + +#include <openbsc/debug.h> + +#include <openbsc/gtphub.h> +#include <gtp.h> +#include <gtpie.h> + +#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); + +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[GSM_APN_LENGTH]; + +struct osmo_sockaddr resolved_ggsn_addr; +static int resolve_to_ggsn(const char *addr, uint16_t port) +{ + LVL2_ASSERT(osmo_sockaddr_init_udp(&resolved_ggsn_addr, + addr, port) + == 0); + return 1; +} + +struct osmo_sockaddr resolved_sgsn_addr; +static int resolve_to_sgsn(const char *addr, uint16_t port) +{ + LVL2_ASSERT(osmo_sockaddr_init_udp(&resolved_sgsn_addr, + addr, port) + == 0); + return 1; +} + +struct osmo_sockaddr sgsn_sender; +static int send_from_sgsn(const char *addr, uint16_t port) +{ + LVL2_ASSERT(osmo_sockaddr_init_udp(&sgsn_sender, + addr, port) + == 0); + return 1; +} + +struct osmo_sockaddr ggsn_sender; +static int send_from_ggsn(const char *addr, uint16_t port) +{ + LVL2_ASSERT(osmo_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 osmo_sockaddr *to_addr, + const uint8_t *buf, size_t buf_len); + +int __wrap_gtphub_write(const struct osmo_fd *to, + const struct osmo_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, + osmo_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); + + 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 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; +} + + +time_t now; +static struct gtphub _hub; +static struct gtphub *hub = &_hub; + +static int setup_test_hub() +{ + /* 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() +{ + /* 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 osmo_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 osmo_sockaddr *_sgsn_sender, + struct osmo_sockaddr *ggsn_receiver, + const char *hex_from_sgsn, + const char *hex_to_ggsn) +{ + struct osmo_fd *ggsn_ofd = NULL; + struct osmo_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 osmo_sockaddr *ggsn_sender, + struct osmo_sockaddr *sgsn_receiver, + const char *msg_from_ggsn, + const char *msg_to_sgsn) +{ + struct osmo_fd *sgsn_ofd; + struct osmo_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() +{ + 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_init_logging(&info); + osmo_gtphub_ctx = talloc_named_const(NULL, 0, "osmo_gtphub"); + + 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); + OSMO_ASSERT(talloc_total_blocks(osmo_gtphub_ctx) == 1); + return 0; +} + |