Holger Hans Peter Freyther | 72bd4eb | 2011-12-11 20:25:12 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * (C) 2011 by Holger Hans Peter Freyther |
| 3 | * (C) 2011 by On-Waves |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <osmocom/core/logging.h> |
| 23 | #include <osmocom/gsm/lapdm.h> |
| 24 | #include <osmocom/gsm/rsl.h> |
| 25 | |
| 26 | #include <errno.h> |
| 27 | |
| 28 | #include <string.h> |
| 29 | |
| 30 | #define CHECK_RC(rc) \ |
| 31 | if (rc != 0) { \ |
| 32 | printf("Operation failed rc=%d on %s:%d\n", rc, __FILE__, __LINE__); \ |
| 33 | abort(); \ |
| 34 | } |
| 35 | |
| 36 | #define ASSERT(exp) \ |
| 37 | if (!(exp)) { \ |
| 38 | printf("Assert failed %s %s:%d\n", #exp, __FILE__, __LINE__); \ |
| 39 | abort(); \ |
| 40 | } |
| 41 | |
| 42 | |
| 43 | static struct log_info info = {}; |
| 44 | |
| 45 | struct lapdm_polling_state { |
| 46 | struct lapdm_channel *bts; |
| 47 | int bts_read; |
| 48 | |
| 49 | struct lapdm_channel *ms; |
| 50 | int ms_read; |
| 51 | }; |
| 52 | |
| 53 | static struct msgb *msgb_from_array(const uint8_t *data, int len) |
| 54 | { |
| 55 | struct msgb *msg = msgb_alloc_headroom(4096, 128, "data"); |
| 56 | msg->l3h = msgb_put(msg, len); |
| 57 | memcpy(msg->l3h, data, len); |
| 58 | return msg; |
| 59 | } |
| 60 | |
| 61 | |
| 62 | static struct msgb *create_cm_serv_req(void) |
| 63 | { |
| 64 | struct msgb *msg; |
| 65 | static const uint8_t cm[] = { |
| 66 | 0x05, 0x24, 0x31, 0x03, 0x50, 0x18, 0x93, 0x08, |
| 67 | 0x29, 0x47, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, |
| 68 | }; |
| 69 | |
| 70 | msg = msgb_from_array(cm, sizeof(cm)); |
| 71 | rsl_rll_push_l3(msg, RSL_MT_EST_REQ, 0, 0, 1); |
| 72 | return msg; |
| 73 | } |
| 74 | |
| 75 | static struct msgb *create_mm_id_req(void) |
| 76 | { |
| 77 | struct msgb *msg; |
| 78 | /* okay... not an identity request */ |
| 79 | static const uint8_t mm[] = { |
| 80 | 0x05, 0x24, 0x31, 0x03, 0x50, 0x18, 0x93, 0x08, |
| 81 | 0x29, 0x47, 0x80, 0x00, |
| 82 | }; |
| 83 | |
| 84 | msg = msgb_from_array(mm, sizeof(mm)); |
| 85 | rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, 0, 0, 1); |
| 86 | return msg; |
| 87 | } |
| 88 | |
| 89 | static struct msgb *create_dummy_data_req(void) |
| 90 | { |
| 91 | struct msgb *msg; |
| 92 | /* okay... not an identity request */ |
| 93 | static const uint8_t dummy1[] = { |
| 94 | 0xab, 0x03, 0x30, 0x60, 0x06, |
| 95 | }; |
| 96 | |
| 97 | msg = msgb_from_array(dummy1, sizeof(dummy1)); |
| 98 | rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, 0, 0, 1); |
| 99 | return msg; |
| 100 | } |
| 101 | |
| 102 | static int send(struct msgb *in_msg, struct lapdm_channel *chan) |
| 103 | { |
| 104 | struct osmo_phsap_prim pp; |
| 105 | struct msgb *msg; |
| 106 | int rc; |
| 107 | |
| 108 | msg = msgb_alloc_headroom(128, 64, "PH-DATA.ind"); |
| 109 | osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_DATA, |
| 110 | PRIM_OP_INDICATION, msg); |
| 111 | /* copy over actual MAC block */ |
| 112 | msg->l2h = msgb_put(msg, msgb_l2len(in_msg)); |
| 113 | memcpy(msg->l2h, in_msg->l2h, msgb_l2len(in_msg)); |
| 114 | |
| 115 | /* LAPDm requires those... */ |
| 116 | pp.u.data.chan_nr = 0; |
| 117 | pp.u.data.link_id = 0; |
| 118 | /* feed into the LAPDm code of libosmogsm */ |
| 119 | rc = lapdm_phsap_up(&pp.oph, &chan->lapdm_dcch); |
| 120 | ASSERT(rc == 0 || rc == -EBUSY); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * I get called from the LAPDm code when something was sent my way... |
| 126 | */ |
| 127 | static int bts_to_ms_tx_cb(struct msgb *in_msg, struct lapdm_entity *le, void *_ctx) |
| 128 | { |
| 129 | struct lapdm_polling_state *state = _ctx; |
| 130 | |
| 131 | state->bts_read += 1; |
| 132 | |
| 133 | printf("%s: MS->BTS(us) message %d\n", __func__, msgb_length(in_msg)); |
| 134 | msgb_free(in_msg); |
| 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static int ms_to_bts_l1_cb(struct osmo_prim_hdr *oph, void *_ctx) |
| 140 | { |
| 141 | int rc; |
| 142 | struct lapdm_polling_state *state = _ctx; |
| 143 | printf("%s: MS(us) -> BTS prim message\n", __func__); |
| 144 | |
| 145 | /* i stuff it into the LAPDm channel of the BTS */ |
| 146 | rc = send(oph->msg, state->bts); |
| 147 | msgb_free(oph->msg); |
| 148 | } |
| 149 | |
| 150 | static int ms_to_bts_tx_cb(struct msgb *msg, struct lapdm_entity *le, void *_ctx) |
| 151 | { |
| 152 | struct lapdm_polling_state *state = _ctx; |
| 153 | |
| 154 | printf("%s: BTS->MS(us) message %d\n", __func__, msgb_length(msg)); |
| 155 | |
| 156 | if (state->ms_read == 0) { |
| 157 | /* TODO: Verify that this is a: PRIM_DL_EST, PRIM_OP_CONFIRM */ |
| 158 | } else if (state->ms_read == 1) { |
| 159 | /* TODO: Verify that this is: create_mm_id_req() */ |
| 160 | } |
| 161 | |
| 162 | state->ms_read += 1; |
| 163 | msgb_free(msg); |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static void test_lapdm_polling() |
| 168 | { |
| 169 | printf("I do some very simple LAPDm test.\n"); |
| 170 | |
| 171 | int rc; |
| 172 | struct lapdm_polling_state test_state; |
| 173 | struct osmo_phsap_prim pp; |
| 174 | |
| 175 | /* Configure LAPDm on both sides */ |
| 176 | struct lapdm_channel bts_to_ms_channel; |
| 177 | struct lapdm_channel ms_to_bts_channel; |
| 178 | memset(&bts_to_ms_channel, 0, sizeof(bts_to_ms_channel)); |
| 179 | memset(&ms_to_bts_channel, 0, sizeof(ms_to_bts_channel)); |
| 180 | |
| 181 | memset(&test_state, 0, sizeof(test_state)); |
| 182 | test_state.bts = &bts_to_ms_channel; |
| 183 | test_state.ms = &ms_to_bts_channel; |
| 184 | |
| 185 | /* BTS to MS in polling mode */ |
| 186 | lapdm_channel_init(&bts_to_ms_channel, LAPDM_MODE_BTS); |
| 187 | lapdm_channel_set_flags(&bts_to_ms_channel, LAPDM_ENT_F_POLLING_ONLY); |
| 188 | lapdm_channel_set_l1(&bts_to_ms_channel, NULL, &test_state); |
| 189 | lapdm_channel_set_l3(&bts_to_ms_channel, bts_to_ms_tx_cb, &test_state); |
| 190 | |
| 191 | /* MS to BTS in direct mode */ |
| 192 | lapdm_channel_init(&ms_to_bts_channel, LAPDM_MODE_MS); |
| 193 | lapdm_channel_set_l1(&ms_to_bts_channel, ms_to_bts_l1_cb, &test_state); |
| 194 | lapdm_channel_set_l3(&ms_to_bts_channel, ms_to_bts_tx_cb, &test_state); |
| 195 | |
| 196 | /* |
| 197 | * We try to send messages from the MS to the BTS to the MS.. |
| 198 | */ |
| 199 | /* 1. Start with MS -> BTS, BTS should have a pending message */ |
| 200 | printf("Establishing link.\n"); |
| 201 | lapdm_rslms_recvmsg(create_cm_serv_req(), &ms_to_bts_channel); |
| 202 | |
| 203 | /* 2. Poll on the BTS for sending out a confirmation */ |
| 204 | printf("\nConfirming\n"); |
| 205 | ASSERT(test_state.bts_read == 1) |
| 206 | rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| 207 | CHECK_RC(rc); |
| 208 | ASSERT(pp.oph.msg->data == pp.oph.msg->l2h); |
| 209 | send(pp.oph.msg, &ms_to_bts_channel); |
| 210 | msgb_free(pp.oph.msg); |
| 211 | ASSERT(test_state.ms_read == 1); |
| 212 | |
| 213 | /* 3. Send some data to the MS */ |
| 214 | printf("\nSending back to MS\n"); |
| 215 | lapdm_rslms_recvmsg(create_mm_id_req(), &bts_to_ms_channel); |
| 216 | rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| 217 | CHECK_RC(rc); |
| 218 | send(pp.oph.msg, &ms_to_bts_channel); |
| 219 | msgb_free(pp.oph.msg); |
| 220 | ASSERT(test_state.ms_read == 2); |
| 221 | |
| 222 | /* verify that there is nothing more to poll */ |
| 223 | rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| 224 | ASSERT(rc < 0); |
| 225 | |
| 226 | /* 3. And back to the BTS */ |
| 227 | printf("\nSending back to BTS\n"); |
| 228 | ASSERT(test_state.ms_read == 2); |
| 229 | lapdm_rslms_recvmsg(create_dummy_data_req(), &ms_to_bts_channel); |
| 230 | |
| 231 | |
| 232 | /* 4. And back to the MS */ |
| 233 | ASSERT(test_state.bts_read == 2) |
| 234 | ASSERT(test_state.ms_read == 2); |
| 235 | rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| 236 | CHECK_RC(rc); |
| 237 | send(pp.oph.msg, &ms_to_bts_channel); |
| 238 | ASSERT(test_state.ms_read == 2); |
| 239 | msgb_free(pp.oph.msg); |
| 240 | |
| 241 | /* verify that there is nothing more to poll */ |
| 242 | rc = lapdm_phsap_dequeue_prim(&bts_to_ms_channel.lapdm_dcch, &pp); |
| 243 | ASSERT(rc < 0); |
| 244 | |
| 245 | /* clean up */ |
| 246 | lapdm_channel_exit(&bts_to_ms_channel); |
| 247 | lapdm_channel_exit(&ms_to_bts_channel); |
| 248 | } |
| 249 | |
| 250 | int main(int argc, char **argv) |
| 251 | { |
| 252 | osmo_init_logging(&info); |
| 253 | |
| 254 | test_lapdm_polling(); |
| 255 | printf("Success.\n"); |
| 256 | |
| 257 | return 0; |
| 258 | } |