Jacob Erlbeck | dcce196 | 2013-10-08 12:04:43 +0200 | [diff] [blame] | 1 | /* test routines for NS connection handling |
| 2 | * (C) 2013 by sysmocom s.f.m.c. GmbH |
| 3 | * Author: Jacob Erlbeck <jerlbeck@sysmocom.de> |
| 4 | */ |
| 5 | |
| 6 | #undef _GNU_SOURCE |
| 7 | #define _GNU_SOURCE |
| 8 | |
| 9 | #include <stdio.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <stdint.h> |
| 12 | #include <string.h> |
| 13 | #include <getopt.h> |
| 14 | #include <dlfcn.h> |
| 15 | #include <sys/types.h> |
| 16 | #include <sys/socket.h> |
| 17 | |
| 18 | #include <osmocom/core/msgb.h> |
| 19 | #include <osmocom/core/application.h> |
| 20 | #include <osmocom/core/utils.h> |
| 21 | #include <osmocom/core/logging.h> |
| 22 | #include <osmocom/core/talloc.h> |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 23 | #include <osmocom/core/signal.h> |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 24 | #include <osmocom/core/rate_ctr.h> |
Jacob Erlbeck | dcce196 | 2013-10-08 12:04:43 +0200 | [diff] [blame] | 25 | #include <osmocom/gprs/gprs_msgb.h> |
| 26 | #include <osmocom/gprs/gprs_ns.h> |
| 27 | #include <osmocom/gprs/gprs_bssgp.h> |
| 28 | |
Jacob Erlbeck | dcce196 | 2013-10-08 12:04:43 +0200 | [diff] [blame] | 29 | /* GPRS Network Service, PDU type: NS_RESET, |
| 30 | * Cause: O&M intervention, NS VCI: 0x1122, NSEI 0x1122 |
| 31 | */ |
| 32 | static const unsigned char gprs_ns_reset[12] = { |
| 33 | 0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x11, 0x22, |
| 34 | 0x04, 0x82, 0x11, 0x22 |
| 35 | }; |
| 36 | |
| 37 | /* GPRS Network Service, PDU type: NS_RESET, |
| 38 | * Cause: O&M intervention, NS VCI: 0x3344, NSEI 0x1122 |
| 39 | */ |
| 40 | static const unsigned char gprs_ns_reset_vci2[12] = { |
| 41 | 0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x33, 0x44, |
| 42 | 0x04, 0x82, 0x11, 0x22 |
| 43 | }; |
| 44 | |
| 45 | /* GPRS Network Service, PDU type: NS_RESET, |
| 46 | * Cause: O&M intervention, NS VCI: 0x1122, NSEI 0x3344 |
| 47 | */ |
| 48 | static const unsigned char gprs_ns_reset_nsei2[12] = { |
| 49 | 0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x11, 0x22, |
| 50 | 0x04, 0x82, 0x33, 0x44 |
| 51 | }; |
| 52 | |
| 53 | /* GPRS Network Service, PDU type: NS_ALIVE */ |
| 54 | static const unsigned char gprs_ns_alive[1] = { |
| 55 | 0x0a |
| 56 | }; |
| 57 | |
| 58 | /* GPRS Network Service, PDU type: NS_STATUS, |
| 59 | * Cause: PDU not compatible with the protocol state |
| 60 | * PDU: NS_ALIVE |
| 61 | */ |
| 62 | static const unsigned char gprs_ns_status_invalid_alive[7] = { |
| 63 | 0x08, 0x00, 0x81, 0x0a, 0x02, 0x81, 0x0a |
| 64 | }; |
| 65 | |
| 66 | /* GPRS Network Service, PDU type: NS_ALIVE_ACK */ |
| 67 | static const unsigned char gprs_ns_alive_ack[1] = { |
| 68 | 0x0b |
| 69 | }; |
| 70 | |
| 71 | /* GPRS Network Service, PDU type: NS_UNBLOCK */ |
| 72 | static const unsigned char gprs_ns_unblock[1] = { |
| 73 | 0x06 |
| 74 | }; |
| 75 | |
| 76 | |
| 77 | /* GPRS Network Service, PDU type: NS_STATUS, |
| 78 | * Cause: PDU not compatible with the protocol state |
| 79 | * PDU: NS_RESET_ACK, NS VCI: 0x1122, NSEI 0x1122 |
| 80 | */ |
| 81 | static const unsigned char gprs_ns_status_invalid_reset_ack[15] = { |
| 82 | 0x08, 0x00, 0x81, 0x0a, 0x02, 0x89, 0x03, 0x01, |
| 83 | 0x82, 0x11, 0x22, 0x04, 0x82, 0x11, 0x22 |
| 84 | }; |
| 85 | |
| 86 | /* GPRS Network Service, PDU type: NS_UNITDATA, BVCI 0 */ |
| 87 | static const unsigned char gprs_bssgp_reset[22] = { |
| 88 | 0x00, 0x00, 0x00, 0x00, 0x22, 0x04, 0x82, 0x4a, |
| 89 | 0x2e, 0x07, 0x81, 0x08, 0x08, 0x88, 0x10, 0x20, |
| 90 | 0x30, 0x40, 0x50, 0x60, 0x10, 0x00 |
| 91 | }; |
| 92 | |
| 93 | int gprs_ns_rcvmsg(struct gprs_ns_inst *nsi, struct msgb *msg, |
| 94 | struct sockaddr_in *saddr, enum gprs_ns_ll ll); |
| 95 | |
| 96 | /* override */ |
| 97 | int gprs_ns_callback(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, |
| 98 | struct msgb *msg, uint16_t bvci) |
| 99 | { |
| 100 | printf("CALLBACK, event %d, msg length %d, bvci 0x%04x\n%s\n\n", |
| 101 | event, msgb_bssgp_len(msg), bvci, |
| 102 | osmo_hexdump(msgb_bssgph(msg), msgb_bssgp_len(msg))); |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | /* override */ |
| 107 | ssize_t sendto(int sockfd, const void *buf, size_t len, int flags, |
| 108 | const struct sockaddr *dest_addr, socklen_t addrlen) |
| 109 | { |
| 110 | typedef ssize_t (*sendto_t)(int, const void *, size_t, int, |
| 111 | const struct sockaddr *, socklen_t); |
| 112 | static sendto_t real_sendto = NULL; |
| 113 | |
| 114 | if (!real_sendto) |
| 115 | real_sendto = dlsym(RTLD_NEXT, "sendto"); |
| 116 | |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 117 | if (((struct sockaddr_in *)dest_addr)->sin_addr.s_addr != htonl(0x01020304)) |
Jacob Erlbeck | dcce196 | 2013-10-08 12:04:43 +0200 | [diff] [blame] | 118 | return real_sendto(sockfd, buf, len, flags, dest_addr, addrlen); |
| 119 | |
| 120 | printf("RESPONSE, msg length %d\n%s\n\n", len, osmo_hexdump(buf, len)); |
| 121 | |
| 122 | return len; |
| 123 | } |
| 124 | |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 125 | static void dump_rate_ctr_group(FILE *stream, const char *prefix, |
| 126 | struct rate_ctr_group *ctrg) |
| 127 | { |
| 128 | unsigned int i; |
| 129 | |
| 130 | for (i = 0; i < ctrg->desc->num_ctr; i++) { |
| 131 | struct rate_ctr *ctr = &ctrg->ctr[i]; |
| 132 | if (ctr->current && !strchr(ctrg->desc->ctr_desc[i].name, '.')) |
| 133 | fprintf(stream, " %s%s: %llu%s", |
| 134 | prefix, ctrg->desc->ctr_desc[i].description, |
| 135 | (long long)ctr->current, |
| 136 | "\n"); |
| 137 | }; |
| 138 | } |
| 139 | |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 140 | /* Signal handler for signals from NS layer */ |
| 141 | static int test_signal(unsigned int subsys, unsigned int signal, |
| 142 | void *handler_data, void *signal_data) |
| 143 | { |
| 144 | struct ns_signal_data *nssd = signal_data; |
| 145 | |
| 146 | if (subsys != SS_L_NS) |
| 147 | return 0; |
| 148 | |
| 149 | switch (signal) { |
| 150 | case S_NS_RESET: |
| 151 | printf("==> got signal NS_RESET, NS-VC 0x%04x/%s\n", |
| 152 | nssd->nsvc->nsvci, |
Jacob Erlbeck | 96550e0 | 2013-10-14 22:06:47 +0200 | [diff] [blame] | 153 | gprs_ns_ll_str(nssd->nsvc)); |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 154 | break; |
| 155 | |
| 156 | case S_NS_ALIVE_EXP: |
| 157 | printf("==> got signal NS_ALIVE_EXP, NS-VC 0x%04x/%s\n", |
| 158 | nssd->nsvc->nsvci, |
Jacob Erlbeck | 96550e0 | 2013-10-14 22:06:47 +0200 | [diff] [blame] | 159 | gprs_ns_ll_str(nssd->nsvc)); |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 160 | break; |
| 161 | |
| 162 | case S_NS_BLOCK: |
| 163 | printf("==> got signal NS_BLOCK, NS-VC 0x%04x/%s\n", |
| 164 | nssd->nsvc->nsvci, |
Jacob Erlbeck | 96550e0 | 2013-10-14 22:06:47 +0200 | [diff] [blame] | 165 | gprs_ns_ll_str(nssd->nsvc)); |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 166 | break; |
| 167 | |
| 168 | case S_NS_UNBLOCK: |
| 169 | printf("==> got signal NS_UNBLOCK, NS-VC 0x%04x/%s\n", |
| 170 | nssd->nsvc->nsvci, |
Jacob Erlbeck | 96550e0 | 2013-10-14 22:06:47 +0200 | [diff] [blame] | 171 | gprs_ns_ll_str(nssd->nsvc)); |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 172 | break; |
| 173 | |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 174 | case S_NS_REPLACED: |
| 175 | printf("==> got signal NS_REPLACED: 0x%04x/%s", |
| 176 | nssd->nsvc->nsvci, |
| 177 | gprs_ns_ll_str(nssd->nsvc)); |
| 178 | printf(" -> 0x%04x/%s\n", |
| 179 | nssd->old_nsvc->nsvci, |
| 180 | gprs_ns_ll_str(nssd->old_nsvc)); |
| 181 | break; |
| 182 | |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 183 | default: |
| 184 | printf("==> got signal %d, NS-VC 0x%04x/%s\n", signal, |
| 185 | nssd->nsvc->nsvci, |
Jacob Erlbeck | 96550e0 | 2013-10-14 22:06:47 +0200 | [diff] [blame] | 186 | gprs_ns_ll_str(nssd->nsvc)); |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 187 | break; |
| 188 | } |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
Jacob Erlbeck | dcce196 | 2013-10-08 12:04:43 +0200 | [diff] [blame] | 193 | static int gprs_process_message(struct gprs_ns_inst *nsi, const char *text, struct sockaddr_in *peer, const unsigned char* data, size_t data_len) |
| 194 | { |
| 195 | struct msgb *msg; |
| 196 | int ret; |
| 197 | if (data_len > NS_ALLOC_SIZE - NS_ALLOC_HEADROOM) { |
| 198 | fprintf(stderr, "message too long: %d\n", data_len); |
| 199 | return -1; |
| 200 | } |
| 201 | |
| 202 | msg = gprs_ns_msgb_alloc(); |
| 203 | memmove(msg->data, data, data_len); |
| 204 | msg->l2h = msg->data; |
| 205 | msgb_put(msg, data_len); |
| 206 | |
| 207 | printf("PROCESSING %s from 0x%08x:%d\n%s\n\n", |
| 208 | text, ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port), |
| 209 | osmo_hexdump(data, data_len)); |
| 210 | |
| 211 | ret = gprs_ns_rcvmsg(nsi, msg, peer, GPRS_NS_LL_UDP); |
| 212 | |
| 213 | printf("result (%s) = %d\n\n", text, ret); |
| 214 | |
| 215 | msgb_free(msg); |
| 216 | |
| 217 | return ret; |
| 218 | } |
| 219 | |
| 220 | static void gprs_dump_nsi(struct gprs_ns_inst *nsi) |
| 221 | { |
| 222 | struct gprs_nsvc *nsvc; |
| 223 | |
| 224 | printf("Current NS-VCIs:\n"); |
| 225 | llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { |
| 226 | struct sockaddr_in *peer = &(nsvc->ip.bts_addr); |
| 227 | printf(" VCI 0x%04x, NSEI 0x%04x, peer 0x%08x:%d\n", |
| 228 | nsvc->nsvci, nsvc->nsei, |
| 229 | ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port) |
| 230 | ); |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 231 | dump_rate_ctr_group(stdout, " ", nsvc->ctrg); |
Jacob Erlbeck | dcce196 | 2013-10-08 12:04:43 +0200 | [diff] [blame] | 232 | } |
| 233 | printf("\n"); |
| 234 | } |
| 235 | |
| 236 | static void test_ns() |
| 237 | { |
| 238 | struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL); |
| 239 | struct sockaddr_in peer[4] = {{0},}; |
| 240 | |
| 241 | peer[0].sin_family = AF_INET; |
| 242 | peer[0].sin_port = htons(1111); |
| 243 | peer[0].sin_addr.s_addr = htonl(0x01020304); |
| 244 | peer[1].sin_family = AF_INET; |
| 245 | peer[1].sin_port = htons(2222); |
| 246 | peer[1].sin_addr.s_addr = htonl(0x01020304); |
| 247 | peer[2].sin_family = AF_INET; |
| 248 | peer[2].sin_port = htons(3333); |
| 249 | peer[2].sin_addr.s_addr = htonl(0x01020304); |
| 250 | peer[3].sin_family = AF_INET; |
| 251 | peer[3].sin_port = htons(4444); |
| 252 | peer[3].sin_addr.s_addr = htonl(0x01020304); |
| 253 | |
| 254 | gprs_process_message(nsi, "RESET", &peer[0], |
| 255 | gprs_ns_reset, sizeof(gprs_ns_reset)); |
| 256 | gprs_dump_nsi(nsi); |
| 257 | gprs_process_message(nsi, "ALIVE", &peer[0], |
| 258 | gprs_ns_alive, sizeof(gprs_ns_alive)); |
| 259 | gprs_process_message(nsi, "UNBLOCK", &peer[0], |
| 260 | gprs_ns_unblock, sizeof(gprs_ns_unblock)); |
| 261 | gprs_process_message(nsi, "BSSGP RESET", &peer[0], |
| 262 | gprs_bssgp_reset, sizeof(gprs_bssgp_reset)); |
| 263 | |
| 264 | printf("--- Peer port changes, RESET, message remains unchanged ---\n\n"); |
| 265 | |
| 266 | gprs_process_message(nsi, "RESET", &peer[1], |
| 267 | gprs_ns_reset, sizeof(gprs_ns_reset)); |
| 268 | gprs_dump_nsi(nsi); |
| 269 | |
| 270 | printf("--- Peer port changes, RESET, VCI changes ---\n\n"); |
| 271 | |
| 272 | gprs_process_message(nsi, "RESET", &peer[2], |
| 273 | gprs_ns_reset_vci2, sizeof(gprs_ns_reset_vci2)); |
| 274 | gprs_dump_nsi(nsi); |
| 275 | |
| 276 | printf("--- Peer port changes, RESET, NSEI changes ---\n\n"); |
| 277 | |
| 278 | gprs_process_message(nsi, "RESET", &peer[3], |
| 279 | gprs_ns_reset_nsei2, sizeof(gprs_ns_reset_nsei2)); |
| 280 | gprs_dump_nsi(nsi); |
| 281 | |
| 282 | printf("--- Peer port 3333, RESET, VCI is changed back ---\n\n"); |
| 283 | |
| 284 | gprs_process_message(nsi, "RESET", &peer[2], |
| 285 | gprs_ns_reset, sizeof(gprs_ns_reset)); |
| 286 | gprs_dump_nsi(nsi); |
| 287 | |
| 288 | printf("--- Peer port 4444, RESET, NSEI is changed back ---\n\n"); |
| 289 | |
| 290 | gprs_process_message(nsi, "RESET", &peer[3], |
| 291 | gprs_ns_reset, sizeof(gprs_ns_reset)); |
| 292 | gprs_dump_nsi(nsi); |
| 293 | |
| 294 | gprs_ns_destroy(nsi); |
| 295 | nsi = NULL; |
| 296 | } |
| 297 | |
| 298 | |
| 299 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 300 | { |
| 301 | return -1; |
| 302 | } |
| 303 | |
| 304 | static struct log_info info = {}; |
| 305 | |
| 306 | int main(int argc, char **argv) |
| 307 | { |
| 308 | osmo_init_logging(&info); |
| 309 | log_set_use_color(osmo_stderr_target, 0); |
| 310 | log_set_print_filename(osmo_stderr_target, 0); |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 311 | osmo_signal_register_handler(SS_L_NS, &test_signal, NULL); |
Jacob Erlbeck | dcce196 | 2013-10-08 12:04:43 +0200 | [diff] [blame] | 312 | |
| 313 | printf("===== NS protocol test START\n"); |
| 314 | test_ns(); |
| 315 | printf("===== NS protocol test END\n\n"); |
| 316 | |
| 317 | exit(EXIT_SUCCESS); |
| 318 | } |