| /* |
| * (C) 2011 by Holger Hans Peter Freyther |
| * (C) 2011 by On-Waves |
| * 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 <osmocom/core/application.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/gsm/lapdm.h> |
| #include <osmocom/gsm/rsl.h> |
| |
| #include <errno.h> |
| |
| #include <string.h> |
| |
| #define CHECK_RC(rc) \ |
| if (rc != 0) { \ |
| printf("Operation failed rc=%d on %s:%d\n", rc, __FILE__, __LINE__); \ |
| abort(); \ |
| } |
| |
| #define ASSERT(exp) \ |
| if (!(exp)) { \ |
| printf("Assert failed %s %s:%d\n", #exp, __FILE__, __LINE__); \ |
| abort(); \ |
| } |
| |
| |
| static struct log_info info = {}; |
| |
| 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 cm_padded[] = { |
| 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 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); |
| 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; |
| ASSERT(msgb_l2len(msg) == 12); |
| msg->l3h = msg->l2h + 6; |
| ASSERT(msgb_l3len(msg) == 6); |
| |
| return msg; |
| } |
| |
| static struct msgb *create_empty_msg(void) |
| { |
| struct msgb *msg; |
| |
| msg = msgb_from_array(NULL, 0); |
| ASSERT(msgb_l3len(msg) == 0); |
| rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, 0, 0, 1); |
| 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); |
| 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; |
| 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); |
| 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"); |
| ASSERT(msgb_l3len(in_msg) == ARRAY_SIZE(cm_padded)); |
| ASSERT(memcmp(in_msg->l3h, cm_padded, ARRAY_SIZE(cm_padded)) == 0); |
| } else if (state->bts_read == 1) { |
| printf("BTS: Verifying dummy message.\n"); |
| ASSERT(msgb_l3len(in_msg) == ARRAY_SIZE(dummy1)); |
| 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 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"); |
| 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; |
| ASSERT(memcmp(msg->data, &hdr, sizeof(hdr)) == 0); |
| |
| /* Verify the added RSL_IE_L3_INFO but we have a bug here */ |
| ASSERT(msg->data[6] == RSL_IE_L3_INFO); |
| #warning "RSL_IE_L3_INFO 16 bit length is wrong" |
| /* ASSERT(msg->data[7] == 0x0 && msg->data[8] == 0x9c); */ |
| /* this should be 0x0 and 0x0... but we have a bug */ |
| } else if (state->ms_read == 1) { |
| printf("MS: Verifying incoming MM message: %d\n", msgb_l3len(msg)); |
| ASSERT(msgb_l3len(msg) == 3); |
| 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"); |
| ASSERT(test_state.bts_read == 1) |
| rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| CHECK_RC(rc); |
| ASSERT(pp.oph.msg->data == pp.oph.msg->l2h); |
| send(pp.oph.msg, &ms_to_bts_channel); |
| msgb_free(pp.oph.msg); |
| 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 = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| CHECK_RC(rc); |
| send(pp.oph.msg, &ms_to_bts_channel); |
| msgb_free(pp.oph.msg); |
| ASSERT(test_state.ms_read == 2); |
| |
| /* verify that there is nothing more to poll */ |
| rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| ASSERT(rc < 0); |
| |
| /* 3. And back to the BTS */ |
| printf("\nSending back to BTS\n"); |
| 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 */ |
| ASSERT(test_state.bts_read == 2) |
| ASSERT(test_state.ms_read == 2); |
| rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| CHECK_RC(rc); |
| send(pp.oph.msg, &ms_to_bts_channel); |
| ASSERT(test_state.ms_read == 2); |
| msgb_free(pp.oph.msg); |
| |
| /* verify that there is nothing more to poll */ |
| rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| ASSERT(rc < 0); |
| |
| /* check sending an empty L3 message fails */ |
| rc = lapdm_rslms_recvmsg(create_empty_msg(), &bts_to_ms_channel); |
| ASSERT(rc == -1); |
| ASSERT(test_state.ms_read == 2); |
| |
| /* clean up */ |
| lapdm_channel_exit(&bts_to_ms_channel); |
| lapdm_channel_exit(&ms_to_bts_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); |
| ASSERT(rc == -EINVAL); |
| |
| /* clean up */ |
| lapdm_channel_exit(&bts_to_ms_channel); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| osmo_init_logging(&info); |
| |
| test_lapdm_polling(); |
| test_lapdm_early_release(); |
| printf("Success.\n"); |
| |
| return 0; |
| } |