/* * (C) 2011 by Holger Hans Peter Freyther * (C) 2011 by On-Waves * (C) 2014 by Daniel Willmann * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 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 General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ #include #include #include #include #include #include #include #define CHECK_RC(rc) \ if (rc != 0) { \ printf("Operation failed rc=%d on %s:%d\n", rc, __FILE__, __LINE__); \ abort(); \ } static struct log_info info = {}; static int dummy_l1_header_len = 0; struct lapdm_polling_state { struct lapdm_channel *bts; int bts_read; struct lapdm_channel *ms; int ms_read; }; static struct msgb *msgb_from_array(const uint8_t *data, int len) { struct msgb *msg = msgb_alloc_headroom(4096, 128, "data"); msg->l3h = msgb_put(msg, len); memcpy(msg->l3h, data, len); return msg; } /* * Test data is below... */ static const uint8_t cm[] = { 0x05, 0x24, 0x31, 0x03, 0x50, 0x18, 0x93, 0x08, 0x29, 0x47, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, }; static const uint8_t ua[] = { 0x01, 0x73, 0x41, 0x05, 0x24, 0x31, 0x03, 0x50, 0x18, 0x93, 0x08, 0x29, 0x47, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0x2b, 0x2b, 0x2b, 0x2b }; static const uint8_t mm[] = { 0x00, 0x0c, 0x00, 0x03, 0x01, 0x01, 0x20, 0x02, 0x00, 0x0b, 0x00, 0x03, 0x05, 0x04, 0x0d }; static const uint8_t dummy1[] = { 0xab, 0x03, 0x30, 0x60, 0x06, }; static const uint8_t rel_req[] = { 0x02, 0x07, 0x01, 0x0a, 0x02, 0x40, 0x14, 0x01 }; static const uint8_t est_req_sdcch_sapi3[] = { 0x02, 0x04, 0x01, 0x20, 0x02, 0x03 }; static const uint8_t est_req_sacch_sapi3[] = { 0x02, 0x04, 0x01, 0x0b, 0x02, 0x43 }; static struct msgb *create_cm_serv_req(void) { struct msgb *msg; msg = msgb_from_array(cm, sizeof(cm)); rsl_rll_push_l3(msg, RSL_MT_EST_REQ, 0, 0, 1); msgb_push(msg, dummy_l1_header_len); return msg; } static struct msgb *create_mm_id_req(void) { struct msgb *msg; msg = msgb_from_array(mm, sizeof(mm)); msg->l2h = msg->data + 3; OSMO_ASSERT(msgb_l2len(msg) == 12); msg->l3h = msg->l2h + 6; OSMO_ASSERT(msgb_l3len(msg) == 6); msgb_push(msg, dummy_l1_header_len); return msg; } static struct msgb *create_empty_msg(void) { struct msgb *msg; msg = msgb_from_array(NULL, 0); OSMO_ASSERT(msgb_l3len(msg) == 0); rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, 0, 0, 1); msgb_push(msg, dummy_l1_header_len); return msg; } static struct msgb *create_dummy_data_req(void) { struct msgb *msg; msg = msgb_from_array(dummy1, sizeof(dummy1)); rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, 0, 0, 1); msgb_push(msg, dummy_l1_header_len); return msg; } static struct msgb *create_rel_req(void) { struct msgb *msg; msg = msgb_from_array(rel_req, sizeof(rel_req)); msg->l2h = msg->data; msgb_push(msg, dummy_l1_header_len); msg->l3h = msg->l2h + sizeof(struct abis_rsl_rll_hdr); return msg; } static struct msgb *create_est_req(const uint8_t *est_req, size_t est_req_size) { struct msgb *msg; msg = msgb_from_array(est_req, est_req_size); msg->l2h = msg->data; msgb_push(msg, dummy_l1_header_len); msg->l3h = msg->l2h + sizeof(struct abis_rsl_rll_hdr); return msg; } static int send(struct msgb *in_msg, struct lapdm_channel *chan) { struct osmo_phsap_prim pp; struct msgb *msg; int rc; msg = msgb_alloc_headroom(128, 64, "PH-DATA.ind"); osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_DATA, PRIM_OP_INDICATION, msg); /* copy over actual MAC block */ msg->l2h = msgb_put(msg, msgb_l2len(in_msg)); memcpy(msg->l2h, in_msg->l2h, msgb_l2len(in_msg)); /* LAPDm requires those... */ pp.u.data.chan_nr = 0; pp.u.data.link_id = 0; /* feed into the LAPDm code of libosmogsm */ rc = lapdm_phsap_up(&pp.oph, &chan->lapdm_dcch); OSMO_ASSERT(rc == 0 || rc == -EBUSY); return 0; } /* Receive from L1 */ static int send_buf(const uint8_t *buf, size_t len, struct lapdm_channel *chan) { struct osmo_phsap_prim pp; struct msgb *msg; int rc; msg = msgb_from_array(buf, len); msg->l2h = msg->l3h; msg->l3h = NULL; osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_DATA, PRIM_OP_INDICATION, msg); /* LAPDm requires those... */ pp.u.data.chan_nr = 0; pp.u.data.link_id = 0; /* feed into the LAPDm code of libosmogsm */ rc = lapdm_phsap_up(&pp.oph, &chan->lapdm_dcch); OSMO_ASSERT(rc == 0 || rc == -EBUSY); return 0; } /* Receive from L3 */ static int enqueue_buf(const uint8_t *buf, size_t len, int sapi, struct lapdm_channel *chan) { struct osmo_dlsap_prim dp; struct msgb *msg; int rc; struct lapdm_datalink *dl; dl = lapdm_datalink_for_sapi(&chan->lapdm_dcch, sapi); OSMO_ASSERT(dl); msg = msgb_from_array(buf, len); osmo_prim_init(&dp.oph, 0, PRIM_DL_DATA, PRIM_OP_REQUEST, msg); rc = lapd_recv_dlsap(&dp, &dl->dl.lctx); OSMO_ASSERT(rc == 0 || rc == -EBUSY); return 0; } static int send_sabm(struct lapdm_channel *chan, int sapi, const uint8_t *data, size_t len) { struct osmo_phsap_prim pp; struct msgb *msg; int rc; OSMO_ASSERT(sapi == 0 || sapi == 3); msg = msgb_alloc_headroom(128, 64, "PH-DATA.ind"); osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_DATA, PRIM_OP_INDICATION, msg); /* copy over actual MAC block */ msg->l2h = msgb_put(msg, 3 + len); msg->l2h[0] = 0x01 | (sapi << 2); msg->l2h[1] = 0x3f; msg->l2h[2] = 0x01 | (len << 2); if (len > 0) memcpy(msg->l2h + 3, data, len); /* LAPDm requires those... */ pp.u.data.chan_nr = 0; pp.u.data.link_id = 0; /* feed into the LAPDm code of libosmogsm */ rc = lapdm_phsap_up(&pp.oph, &chan->lapdm_dcch); OSMO_ASSERT(rc == 0 || rc == -EBUSY); return 0; } /* * I get called from the LAPDm code when something was sent my way... */ static int bts_to_ms_tx_cb(struct msgb *in_msg, struct lapdm_entity *le, void *_ctx) { struct lapdm_polling_state *state = _ctx; printf("%s: MS->BTS(us) message %d\n", __func__, msgb_length(in_msg)); if (state->bts_read == 0) { printf("BTS: Verifying CM request.\n"); OSMO_ASSERT(msgb_l3len(in_msg) == ARRAY_SIZE(cm)); OSMO_ASSERT(memcmp(in_msg->l3h, cm, ARRAY_SIZE(cm)) == 0); } else if (state->bts_read == 1) { printf("BTS: Verifying dummy message.\n"); OSMO_ASSERT(msgb_l3len(in_msg) == ARRAY_SIZE(dummy1)); OSMO_ASSERT(memcmp(in_msg->l3h, dummy1, ARRAY_SIZE(dummy1)) == 0); } else { printf("BTS: Do not know to verify: %d\n", state->bts_read); } state->bts_read += 1; msgb_free(in_msg); return 0; } static int ms_to_bts_l1_cb(struct osmo_prim_hdr *oph, void *_ctx) { int rc; struct lapdm_polling_state *state = _ctx; printf("%s: MS(us) -> BTS prim message\n", __func__); /* i stuff it into the LAPDm channel of the BTS */ rc = send(oph->msg, state->bts); msgb_free(oph->msg); return rc; } static int dequeue_prim(struct lapdm_entity *le, struct osmo_phsap_prim *pp, const char *queue_name) { int rc; int l2_header_len; int l3_len = 0; /* Take message from queue */ rc = lapdm_phsap_dequeue_prim(le, pp); fprintf(stderr, "dequeue: got rc %d: %s\n", rc, rc <= 0 ? strerror(-rc) : "-"); if (rc < 0) return rc; l2_header_len = msgb_l2len(pp->oph.msg); if (msgb_l3(pp->oph.msg)) { l3_len = msgb_l3len(pp->oph.msg); l2_header_len -= l3_len; } else fprintf(stderr, "MSGB: L3 is undefined\n"); if (l2_header_len < 0 || l2_header_len > pp->oph.msg->data_len) { fprintf(stderr, "MSGB inconsistent: data = %p, l2 = %p, l3 = %p, tail = %p\n", pp->oph.msg->data, pp->oph.msg->l2h, pp->oph.msg->l3h, pp->oph.msg->tail); l2_header_len = -1; } printf("Took message from %s queue: " "L2 header size %d, L3 size %d, " "SAP %#x, %d/%d, Link 0x%02x\n", queue_name, l2_header_len, l3_len, pp->oph.sap, pp->oph.primitive, pp->oph.operation, pp->u.data.link_id); printf("Message: %s\n", msgb_hexdump(pp->oph.msg)); return rc; } static int ms_to_bts_tx_cb(struct msgb *msg, struct lapdm_entity *le, void *_ctx) { struct lapdm_polling_state *state = _ctx; printf("%s: BTS->MS(us) message %d\n", __func__, msgb_length(msg)); if (state->ms_read == 0) { struct abis_rsl_rll_hdr hdr; printf("MS: Verifying incoming primitive.\n"); OSMO_ASSERT(msg->len == sizeof(struct abis_rsl_rll_hdr) + 3); /* verify the header */ memset(&hdr, 0, sizeof(hdr)); rsl_init_rll_hdr(&hdr, RSL_MT_EST_CONF); hdr.c.msg_discr |= ABIS_RSL_MDISC_TRANSP; OSMO_ASSERT(memcmp(msg->data, &hdr, sizeof(hdr)) == 0); /* Verify the added RSL_IE_L3_INFO but we have a bug here */ OSMO_ASSERT(msg->data[6] == RSL_IE_L3_INFO); #warning "RSL_IE_L3_INFO 16 bit length is wrong" /* This should be okay but it is actually 0x0, 0x9c on ia-32 */ /* OSMO_ASSERT(msg->data[7] == 0x0 && msg->data[8] == 0x0); */ } else if (state->ms_read == 1) { printf("MS: Verifying incoming MM message: %d\n", msgb_l3len(msg)); OSMO_ASSERT(msgb_l3len(msg) == 3); OSMO_ASSERT(memcmp(msg->l3h, &mm[12], msgb_l3len(msg)) == 0); } else { printf("MS: Do not know to verify: %d\n", state->ms_read); } state->ms_read += 1; msgb_free(msg); return 0; } static void test_lapdm_polling() { printf("I do some very simple LAPDm test.\n"); int rc; struct lapdm_polling_state test_state; struct osmo_phsap_prim pp; /* Configure LAPDm on both sides */ struct lapdm_channel bts_to_ms_channel; struct lapdm_channel ms_to_bts_channel; memset(&bts_to_ms_channel, 0, sizeof(bts_to_ms_channel)); memset(&ms_to_bts_channel, 0, sizeof(ms_to_bts_channel)); memset(&test_state, 0, sizeof(test_state)); test_state.bts = &bts_to_ms_channel; test_state.ms = &ms_to_bts_channel; /* BTS to MS in polling mode */ lapdm_channel_init(&bts_to_ms_channel, LAPDM_MODE_BTS); lapdm_channel_set_flags(&bts_to_ms_channel, LAPDM_ENT_F_POLLING_ONLY); lapdm_channel_set_l1(&bts_to_ms_channel, NULL, &test_state); lapdm_channel_set_l3(&bts_to_ms_channel, bts_to_ms_tx_cb, &test_state); /* MS to BTS in direct mode */ lapdm_channel_init(&ms_to_bts_channel, LAPDM_MODE_MS); lapdm_channel_set_l1(&ms_to_bts_channel, ms_to_bts_l1_cb, &test_state); lapdm_channel_set_l3(&ms_to_bts_channel, ms_to_bts_tx_cb, &test_state); /* * We try to send messages from the MS to the BTS to the MS.. */ /* 1. Start with MS -> BTS, BTS should have a pending message */ printf("Establishing link.\n"); lapdm_rslms_recvmsg(create_cm_serv_req(), &ms_to_bts_channel); /* 2. Poll on the BTS for sending out a confirmation */ printf("\nConfirming\n"); OSMO_ASSERT(test_state.bts_read == 1); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(pp.oph.msg->data == pp.oph.msg->l2h); send(pp.oph.msg, &ms_to_bts_channel); msgb_free(pp.oph.msg); OSMO_ASSERT(test_state.ms_read == 1); /* 3. Send some data to the MS */ printf("\nSending back to MS\n"); lapdm_rslms_recvmsg(create_mm_id_req(), &bts_to_ms_channel); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); send(pp.oph.msg, &ms_to_bts_channel); msgb_free(pp.oph.msg); OSMO_ASSERT(test_state.ms_read == 2); /* verify that there is nothing more to poll */ rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); OSMO_ASSERT(rc < 0); /* 3. And back to the BTS */ printf("\nSending back to BTS\n"); OSMO_ASSERT(test_state.ms_read == 2); lapdm_rslms_recvmsg(create_dummy_data_req(), &ms_to_bts_channel); /* 4. And back to the MS, but let's move data/l2h apart */ OSMO_ASSERT(test_state.bts_read == 2); OSMO_ASSERT(test_state.ms_read == 2); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); send(pp.oph.msg, &ms_to_bts_channel); OSMO_ASSERT(test_state.ms_read == 2); msgb_free(pp.oph.msg); /* verify that there is nothing more to poll */ rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); OSMO_ASSERT(rc < 0); rc = dequeue_prim(&bts_to_ms_channel.lapdm_acch, &pp, "ACCH"); OSMO_ASSERT(rc < 0); /* check sending an empty L3 message fails */ rc = lapdm_rslms_recvmsg(create_empty_msg(), &bts_to_ms_channel); OSMO_ASSERT(rc == -1); OSMO_ASSERT(test_state.ms_read == 2); /* clean up */ lapdm_channel_exit(&bts_to_ms_channel); lapdm_channel_exit(&ms_to_bts_channel); /* Check if exit is idempotent */ lapdm_channel_exit(&bts_to_ms_channel); lapdm_channel_exit(&ms_to_bts_channel); } static void test_lapdm_contention_resolution() { printf("I test contention resultion by having two mobiles collide and " "first mobile repeating SABM.\n"); int rc; struct lapdm_polling_state test_state; struct osmo_phsap_prim pp; uint8_t *cm2; /* Configure LAPDm on both sides */ struct lapdm_channel bts_to_ms_channel; memset(&bts_to_ms_channel, 0, sizeof(bts_to_ms_channel)); memset(&test_state, 0, sizeof(test_state)); test_state.bts = &bts_to_ms_channel; /* BTS to MS in polling mode */ lapdm_channel_init(&bts_to_ms_channel, LAPDM_MODE_BTS); lapdm_channel_set_flags(&bts_to_ms_channel, LAPDM_ENT_F_POLLING_ONLY); lapdm_channel_set_l1(&bts_to_ms_channel, NULL, &test_state); lapdm_channel_set_l3(&bts_to_ms_channel, bts_to_ms_tx_cb, &test_state); /* Send SABM MS 1, we must get UA */ send_sabm(&bts_to_ms_channel, 0, cm, sizeof(cm)); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, ua, ARRAY_SIZE(ua)) == 0); /* Send SABM MS 2, we must get nothing, due to collision */ cm2 = malloc(sizeof(cm)); memcpy(cm2, cm, sizeof(cm)); cm2[0] += 1; send_sabm(&bts_to_ms_channel, 0, cm2, sizeof(cm2)); free(cm2); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); OSMO_ASSERT(rc == -ENODEV); /* Send SABM MS 1 again, we must get UA gain */ send_sabm(&bts_to_ms_channel, 0, cm, sizeof(cm)); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, ua, ARRAY_SIZE(ua)) == 0); /* clean up */ lapdm_channel_exit(&bts_to_ms_channel); /* idempotent */ lapdm_channel_exit(&bts_to_ms_channel); } static void test_lapdm_early_release() { printf("I test RF channel release of an unestablished channel.\n"); int rc; struct lapdm_polling_state test_state; /* Configure LAPDm on both sides */ struct lapdm_channel bts_to_ms_channel; memset(&bts_to_ms_channel, 0, sizeof(bts_to_ms_channel)); memset(&test_state, 0, sizeof(test_state)); test_state.bts = &bts_to_ms_channel; /* BTS to MS in polling mode */ lapdm_channel_init(&bts_to_ms_channel, LAPDM_MODE_BTS); lapdm_channel_set_flags(&bts_to_ms_channel, LAPDM_ENT_F_POLLING_ONLY); lapdm_channel_set_l1(&bts_to_ms_channel, NULL, &test_state); lapdm_channel_set_l3(&bts_to_ms_channel, bts_to_ms_tx_cb, &test_state); /* Send the release request */ rc = lapdm_rslms_recvmsg(create_rel_req(), &bts_to_ms_channel); OSMO_ASSERT(rc == -EINVAL); /* clean up */ lapdm_channel_exit(&bts_to_ms_channel); /* Check if exit is idempotent */ lapdm_channel_exit(&bts_to_ms_channel); } static void lapdm_establish(const uint8_t *est_req, size_t est_req_size) { int rc; struct lapdm_polling_state test_state; struct osmo_phsap_prim pp; struct msgb *msg; /* Configure LAPDm on both sides */ struct lapdm_channel bts_to_ms_channel; memset(&bts_to_ms_channel, 0, sizeof(bts_to_ms_channel)); memset(&test_state, 0, sizeof(test_state)); test_state.bts = &bts_to_ms_channel; /* BTS to MS in polling mode */ lapdm_channel_init(&bts_to_ms_channel, LAPDM_MODE_BTS); lapdm_channel_set_flags(&bts_to_ms_channel, LAPDM_ENT_F_POLLING_ONLY); lapdm_channel_set_l1(&bts_to_ms_channel, NULL, &test_state); lapdm_channel_set_l3(&bts_to_ms_channel, bts_to_ms_tx_cb, &test_state); /* Send the release request */ msg = create_est_req(est_req, est_req_size); rc = lapdm_rslms_recvmsg(msg, &bts_to_ms_channel); fprintf(stderr, "recvmsg: got rc %d: %s\n", rc, rc <= 0 ? strerror(-rc) : "???"); OSMO_ASSERT(rc == 0); /* Take message from queue */ rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); if (rc < 0) rc = dequeue_prim(&bts_to_ms_channel.lapdm_acch, &pp, "ACCH"); CHECK_RC(rc); OSMO_ASSERT(pp.oph.msg->data == msgb_l2(pp.oph.msg)); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); OSMO_ASSERT(rc < 0); rc = dequeue_prim(&bts_to_ms_channel.lapdm_acch, &pp, "ACCH"); OSMO_ASSERT(rc < 0); /* clean up */ lapdm_channel_exit(&bts_to_ms_channel); /* idempotent */ lapdm_channel_exit(&bts_to_ms_channel); } static void test_lapdm_establishment() { printf("I test RF channel establishment.\n"); printf("Testing SAPI3/SDCCH\n"); lapdm_establish(est_req_sdcch_sapi3, sizeof(est_req_sdcch_sapi3)); printf("Testing SAPI3/SACCH\n"); lapdm_establish(est_req_sacch_sapi3, sizeof(est_req_sacch_sapi3)); } const uint8_t cm_chg[] = { 0x01, 0x00, 0x49, 0x06, 0x16, 0x03, 0x33, 0x59, 0xa6, 0x20, 0x0a, 0x20, 0x04, 0x04, 0x2f, 0x65, 0x23, 0x02, 0x00, 0x24, 0x04 }; const uint8_t cm_chg_ack[] = { 0x01, 0x21, 0x01 }; const uint8_t gprs_susp[] = { 0x01, 0x02, 0x35, 0x06, 0x34, 0xe3, 0xd4, 0xd2, 0x6f, 0x09, 0xf1, 0x07, 0x00, 0x01, 0x00, 0x02 }; const uint8_t gprs_susp_ack[] = { 0x01, 0x41, 0x01 }; const uint8_t cipher_cmd[] = { 0x06, 0x35, 0x01 }; /* The cipher command we send to the MS */ const uint8_t cipher_cmd_out[] = { 0x03, 0x20, 0x0d, 0x06, 0x35, 0x01 }; uint8_t cipher_compl[] = { 0x01, 0x24, 0x09, 0x06, 0x32 }; uint8_t cipher_compl_ack[] = { 0x01, 0x61, 0x01 }; static const uint8_t ua_sms[] = { 0x0d, 0x73, 0x01 }; const uint8_t cp_data_1[] = { 0x0d, 0x00, 0x53, 0x59, 0x01, 0x5c, 0x00, 0x4c, 0x00, 0x06, 0x91, 0x86, 0x77, 0x07, 0x00, 0xf9, 0x51, 0x11, 0x76, 0x05, 0x81, 0x29, 0x32 }; const uint8_t cp_data_1_ack[] = { 0x0d, 0x21, 0x01 }; static int bts_to_ms_dummy_tx_cb(struct msgb *in_msg, struct lapdm_entity *le, void *_ctx) { printf("%s: MS->BTS(us) message %d\n", __func__, msgb_length(in_msg)); msgb_free(in_msg); return 0; } static void dump_queue(struct llist_head *head) { struct msgb* msg; printf("\nDumping queue:\n"); llist_for_each_entry(msg, head, list) printf("%s\n", msgb_hexdump(msg)); printf("\n"); } static void test_lapdm_desync() { printf("I test if desync problems exist in LAPDm\n"); int rc; struct osmo_phsap_prim pp; /* Configure LAPDm on both sides */ struct lapdm_channel bts_to_ms_channel; memset(&bts_to_ms_channel, 0, sizeof(bts_to_ms_channel)); /* BTS to MS in polling mode */ lapdm_channel_init(&bts_to_ms_channel, LAPDM_MODE_BTS); lapdm_channel_set_flags(&bts_to_ms_channel, LAPDM_ENT_F_POLLING_ONLY); lapdm_channel_set_l1(&bts_to_ms_channel, NULL, NULL); lapdm_channel_set_l3(&bts_to_ms_channel, bts_to_ms_dummy_tx_cb, NULL); struct lapdm_datalink *dl = lapdm_datalink_for_sapi(&bts_to_ms_channel.lapdm_dcch, 0); dl->mctx.dl = dl; dl->dl.lctx.dl = &dl->dl; /* Send SABM MS 1, we must get UA */ printf("\nEstablishing SAPI=0\n"); send_sabm(&bts_to_ms_channel, 0, cm, sizeof(cm)); dump_queue(&dl->dl.tx_queue); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, ua, ARRAY_SIZE(ua)) == 0); printf("\nSending Classmark Change\n"); send_buf(cm_chg, sizeof(cm_chg), &bts_to_ms_channel); dump_queue(&dl->dl.tx_queue); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, cm_chg_ack, ARRAY_SIZE(cm_chg_ack)) == 0); printf("\nEnqueueing Ciphering Mode Command\n"); enqueue_buf(cipher_cmd, sizeof(cipher_cmd), 0, &bts_to_ms_channel); dump_queue(&dl->dl.tx_queue); printf("\nSending GPRS Suspend Request\n"); send_buf(gprs_susp, sizeof(gprs_susp), &bts_to_ms_channel); dump_queue(&dl->dl.tx_queue); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, cipher_cmd_out, ARRAY_SIZE(cipher_cmd_out)) == 0); printf("\nSending Cipher Mode Complete\n"); send_buf(cipher_compl, sizeof(cipher_compl), &bts_to_ms_channel); dump_queue(&dl->dl.tx_queue); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, gprs_susp_ack, ARRAY_SIZE(gprs_susp_ack)) == 0); printf("\nEstablishing SAPI=3\n"); send_sabm(&bts_to_ms_channel, 3, NULL, 0); dump_queue(&dl->dl.tx_queue); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, ua_sms, ARRAY_SIZE(ua_sms)) == 0); printf("\nSending CP-DATA\n"); send_buf(cp_data_1, sizeof(cp_data_1), &bts_to_ms_channel); dump_queue(&dl->dl.tx_queue); rc = dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp, "DCCH"); CHECK_RC(rc); OSMO_ASSERT(memcmp(pp.oph.msg->l2h, cipher_compl_ack, ARRAY_SIZE(cipher_compl_ack)) == 0); /* clean up */ lapdm_channel_exit(&bts_to_ms_channel); /* Check if exit is idempotent */ lapdm_channel_exit(&bts_to_ms_channel); } int main(int argc, char **argv) { osmo_init_logging(&info); /* Prevent the test from segfaulting */ dummy_l1_header_len = 0; test_lapdm_polling(); dummy_l1_header_len = 3; test_lapdm_early_release(); test_lapdm_contention_resolution(); test_lapdm_establishment(); test_lapdm_desync(); printf("Success.\n"); return 0; }