Harald Welte | 77847ad | 2015-10-06 22:07:04 +0200 | [diff] [blame] | 1 | /* main application for hnb-gw part of osmo-iuh */ |
| 2 | |
| 3 | /* (C) 2015 by Harald Welte <laforge@gnumonks.org> |
| 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 Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 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 Affero General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 21 | #include <unistd.h> |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <getopt.h> |
| 26 | #include <errno.h> |
| 27 | #include <signal.h> |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 28 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 29 | #include <sys/types.h> |
| 30 | #include <sys/socket.h> |
Harald Welte | 1d2c39d | 2015-09-11 17:49:37 +0200 | [diff] [blame] | 31 | #include <netinet/in.h> |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 32 | #include <netinet/sctp.h> |
Harald Welte | 1d2c39d | 2015-09-11 17:49:37 +0200 | [diff] [blame] | 33 | #include <arpa/inet.h> |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 34 | |
| 35 | #include <osmocom/core/application.h> |
| 36 | #include <osmocom/core/talloc.h> |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 37 | #include <osmocom/core/select.h> |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 38 | #include <osmocom/core/logging.h> |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 39 | #include <osmocom/core/socket.h> |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 40 | #include <osmocom/core/msgb.h> |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 41 | #include <osmocom/core/write_queue.h> |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 42 | |
| 43 | #include <osmocom/vty/telnet_interface.h> |
| 44 | #include <osmocom/vty/logging.h> |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 45 | |
| 46 | #include "hnbgw.h" |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 47 | #include "hnbgw_hnbap.h" |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 48 | #include "hnbgw_rua.h" |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 49 | |
| 50 | static void *tall_hnb_ctx; |
Harald Welte | b534e5c | 2015-09-11 00:15:16 +0200 | [diff] [blame] | 51 | static void *tall_ue_ctx; |
Harald Welte | 08de638 | 2015-08-31 09:54:45 +0200 | [diff] [blame] | 52 | void *talloc_asn1_ctx; |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 53 | |
| 54 | struct hnb_gw g_hnb_gw = { |
| 55 | .config = { |
| 56 | .iuh_listen_port = IUH_DEFAULT_SCTP_PORT, |
| 57 | }, |
| 58 | }; |
| 59 | |
Harald Welte | b534e5c | 2015-09-11 00:15:16 +0200 | [diff] [blame] | 60 | struct ue_context *ue_context_by_id(uint32_t id) |
| 61 | { |
| 62 | struct ue_context *ue; |
| 63 | |
| 64 | llist_for_each_entry(ue, &g_hnb_gw.ue_list, list) { |
| 65 | if (ue->context_id == id) |
| 66 | return ue; |
| 67 | } |
| 68 | return NULL; |
| 69 | |
| 70 | } |
| 71 | |
| 72 | struct ue_context *ue_context_by_imsi(const char *imsi) |
| 73 | { |
| 74 | struct ue_context *ue; |
| 75 | |
| 76 | llist_for_each_entry(ue, &g_hnb_gw.ue_list, list) { |
| 77 | if (!strcmp(ue->imsi, imsi)) |
| 78 | return ue; |
| 79 | } |
| 80 | return NULL; |
| 81 | } |
| 82 | |
| 83 | static uint32_t get_next_ue_ctx_id(void) |
| 84 | { |
| 85 | uint32_t id; |
| 86 | |
| 87 | do { |
| 88 | id = g_hnb_gw.next_ue_ctx_id++; |
| 89 | } while (ue_context_by_id(id)); |
| 90 | |
| 91 | return id; |
| 92 | } |
| 93 | |
| 94 | struct ue_context *ue_context_alloc(struct hnb_context *hnb, const char *imsi) |
| 95 | { |
| 96 | struct ue_context *ue; |
| 97 | |
| 98 | ue = talloc_zero(tall_hnb_ctx, struct ue_context); |
| 99 | if (!ue) |
| 100 | return NULL; |
| 101 | |
| 102 | ue->hnb = hnb; |
| 103 | strncpy(ue->imsi, imsi, sizeof(ue->imsi)); |
| 104 | ue->context_id = get_next_ue_ctx_id(); |
Harald Welte | 256c67a | 2015-09-11 01:22:29 +0200 | [diff] [blame] | 105 | llist_add_tail(&ue->list, &g_hnb_gw.ue_list); |
Harald Welte | b534e5c | 2015-09-11 00:15:16 +0200 | [diff] [blame] | 106 | |
| 107 | return ue; |
| 108 | } |
| 109 | |
| 110 | void ue_context_free(struct ue_context *ue) |
| 111 | { |
| 112 | llist_del(&ue->list); |
| 113 | talloc_free(ue); |
| 114 | } |
| 115 | |
| 116 | |
| 117 | |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 118 | static int hnb_read_cb(struct osmo_fd *fd) |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 119 | { |
| 120 | struct hnb_context *hnb = fd->data; |
| 121 | struct sctp_sndrcvinfo sinfo; |
| 122 | struct msgb *msg = msgb_alloc(IUH_MSGB_SIZE, "Iuh rx"); |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 123 | int flags = 0; |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 124 | int rc; |
| 125 | |
| 126 | if (!msg) |
| 127 | return -ENOMEM; |
| 128 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 129 | /* we store a reference to the HomeNodeB in the msg->dest for the |
| 130 | * benefit of varoius downstream processing functions */ |
| 131 | msg->dst = hnb; |
| 132 | |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 133 | rc = sctp_recvmsg(fd->fd, msgb_data(msg), msgb_tailroom(msg), |
| 134 | NULL, NULL, &sinfo, &flags); |
| 135 | if (rc < 0) { |
| 136 | LOGP(DMAIN, LOGL_ERROR, "Error during sctp_recvmsg()\n"); |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 137 | /* FIXME: clean up after disappeared HNB */ |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 138 | return rc; |
| 139 | } else |
| 140 | msgb_put(msg, rc); |
| 141 | |
Harald Welte | 17878e2 | 2015-09-08 00:09:13 +0200 | [diff] [blame] | 142 | if (flags & MSG_NOTIFICATION) { |
| 143 | LOGP(DMAIN, LOGL_INFO, "Ignoring SCTP notification\n"); |
| 144 | msgb_free(msg); |
| 145 | return 0; |
| 146 | } |
| 147 | |
Harald Welte | 5c11c94 | 2015-09-07 19:54:49 +0200 | [diff] [blame] | 148 | sinfo.sinfo_ppid = ntohl(sinfo.sinfo_ppid); |
| 149 | |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 150 | switch (sinfo.sinfo_ppid) { |
| 151 | case IUH_PPI_HNBAP: |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 152 | hnb->hnbap_stream = sinfo.sinfo_stream; |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 153 | rc = hnbgw_hnbap_rx(hnb, msg); |
| 154 | break; |
| 155 | case IUH_PPI_RUA: |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 156 | hnb->rua_stream = sinfo.sinfo_stream; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 157 | rc = hnbgw_rua_rx(hnb, msg); |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 158 | break; |
| 159 | case IUH_PPI_SABP: |
| 160 | case IUH_PPI_RNA: |
| 161 | case IUH_PPI_PUA: |
| 162 | LOGP(DMAIN, LOGL_ERROR, "Unimplemented SCTP PPID=%u received\n", |
| 163 | sinfo.sinfo_ppid); |
| 164 | rc = 0; |
| 165 | break; |
| 166 | default: |
| 167 | LOGP(DMAIN, LOGL_ERROR, "Unknown SCTP PPID=%u received\n", |
| 168 | sinfo.sinfo_ppid); |
| 169 | rc = 0; |
| 170 | break; |
| 171 | } |
| 172 | |
Harald Welte | f2f3000 | 2015-09-08 00:09:23 +0200 | [diff] [blame] | 173 | msgb_free(msg); |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 174 | return rc; |
| 175 | } |
| 176 | |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 177 | static int hnb_write_cb(struct osmo_fd *fd, struct msgb *msg) |
| 178 | { |
| 179 | struct hnb_context *ctx = fd->data; |
| 180 | struct sctp_sndrcvinfo sinfo = { |
Harald Welte | cfcc1e6 | 2015-09-07 22:39:56 +0200 | [diff] [blame] | 181 | .sinfo_ppid = htonl(msgb_ppid(msg)), |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 182 | .sinfo_stream = ctx->hnbap_stream, |
| 183 | }; |
| 184 | int rc; |
| 185 | |
| 186 | rc = sctp_send(fd->fd, msgb_data(msg), msgb_length(msg), |
| 187 | &sinfo, 0); |
Harald Welte | 9e270b4 | 2015-09-07 22:41:26 +0200 | [diff] [blame] | 188 | /* we don't need to msgb_free(), write_queue does this for us */ |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 189 | return rc; |
| 190 | } |
| 191 | |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 192 | /*! call-back when the listen FD has something to read */ |
| 193 | static int listen_fd_cb(struct osmo_fd *fd, unsigned int what) |
| 194 | { |
| 195 | struct hnb_gw *gw = fd->data; |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 196 | struct hnb_context *ctx; |
| 197 | struct sockaddr_storage sockaddr; |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 198 | socklen_t len = sizeof(sockaddr); |
| 199 | |
| 200 | int new_fd = accept(fd->fd, (struct sockaddr *)&sockaddr, &len); |
| 201 | if (new_fd < 0) { |
| 202 | LOGP(DMAIN, LOGL_ERROR, "Iuh accept() failed\n"); |
| 203 | return new_fd; |
| 204 | } |
| 205 | |
| 206 | LOGP(DMAIN, LOGL_INFO, "SCTP Connection accept()ed\n"); |
| 207 | |
| 208 | ctx = talloc_zero(tall_hnb_ctx, struct hnb_context); |
| 209 | if (!ctx) |
| 210 | return -ENOMEM; |
| 211 | |
| 212 | ctx->gw = gw; |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 213 | osmo_wqueue_init(&ctx->wqueue, 16); |
| 214 | ctx->wqueue.bfd.data = ctx; |
| 215 | ctx->wqueue.bfd.fd = new_fd; |
| 216 | ctx->wqueue.bfd.when = BSC_FD_READ; |
| 217 | ctx->wqueue.read_cb = hnb_read_cb; |
| 218 | ctx->wqueue.write_cb = hnb_write_cb; |
| 219 | osmo_fd_register(&ctx->wqueue.bfd); |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 220 | |
| 221 | llist_add_tail(&ctx->list, &gw->hnb_list); |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 222 | |
| 223 | return 0; |
| 224 | } |
| 225 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 226 | static const struct log_info_cat log_cat[] = { |
| 227 | [DMAIN] = { |
| 228 | .name = "DMAIN", .loglevel = LOGL_DEBUG, .enabled = 1, |
| 229 | .color = "", |
| 230 | .description = "Main program", |
| 231 | }, |
| 232 | }; |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 233 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 234 | static const struct log_info hnbgw_log_info = { |
| 235 | .cat = log_cat, |
| 236 | .num_cat = ARRAY_SIZE(log_cat), |
| 237 | }; |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 238 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 239 | static struct vty_app_info vty_info = { |
| 240 | .name = "OsmoHNBGW", |
| 241 | .version = "0", |
| 242 | }; |
| 243 | |
| 244 | static int daemonize = 0; |
| 245 | |
Harald Welte | 5c11c94 | 2015-09-07 19:54:49 +0200 | [diff] [blame] | 246 | static int sctp_sock_init(int fd) |
| 247 | { |
| 248 | struct sctp_event_subscribe event; |
| 249 | int rc; |
| 250 | |
| 251 | /* subscribe for all events */ |
| 252 | memset((uint8_t *)&event, 1, sizeof(event)); |
| 253 | rc = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, |
| 254 | &event, sizeof(event)); |
| 255 | |
| 256 | return rc; |
| 257 | } |
| 258 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 259 | int main(int argc, char **argv) |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 260 | { |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 261 | int rc; |
| 262 | |
| 263 | tall_hnb_ctx = talloc_named_const(NULL, 0, "hnb_context"); |
Harald Welte | b534e5c | 2015-09-11 00:15:16 +0200 | [diff] [blame] | 264 | tall_ue_ctx = talloc_named_const(NULL, 0, "ue_context"); |
Harald Welte | 08de638 | 2015-08-31 09:54:45 +0200 | [diff] [blame] | 265 | talloc_asn1_ctx = talloc_named_const(NULL, 0, "asn1_context"); |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 266 | |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 267 | g_hnb_gw.listen_fd.cb = listen_fd_cb; |
| 268 | g_hnb_gw.listen_fd.when = BSC_FD_READ; |
| 269 | g_hnb_gw.listen_fd.data = &g_hnb_gw; |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 270 | g_hnb_gw.next_ue_ctx_id = 23; |
Harald Welte | 08a793b | 2015-09-07 19:53:46 +0200 | [diff] [blame] | 271 | INIT_LLIST_HEAD(&g_hnb_gw.hnb_list); |
Harald Welte | b534e5c | 2015-09-11 00:15:16 +0200 | [diff] [blame] | 272 | INIT_LLIST_HEAD(&g_hnb_gw.ue_list); |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 273 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 274 | rc = osmo_init_logging(&hnbgw_log_info); |
| 275 | if (rc < 0) |
| 276 | exit(1); |
| 277 | |
| 278 | vty_init(&vty_info); |
| 279 | |
| 280 | rc = telnet_init(NULL, &g_hnb_gw, 2323); |
| 281 | if (rc < 0) { |
| 282 | perror("Error binding VTY port"); |
| 283 | exit(1); |
| 284 | } |
| 285 | |
| 286 | rc = osmo_sock_init_ofd(&g_hnb_gw.listen_fd, AF_INET, SOCK_STREAM, |
Harald Welte | 1c0f538 | 2015-09-07 18:46:58 +0200 | [diff] [blame] | 287 | IPPROTO_SCTP, NULL, |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 288 | g_hnb_gw.config.iuh_listen_port, OSMO_SOCK_F_BIND); |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 289 | if (rc < 0) { |
| 290 | perror("Error binding Iuh port"); |
| 291 | exit(1); |
| 292 | } |
Harald Welte | 5c11c94 | 2015-09-07 19:54:49 +0200 | [diff] [blame] | 293 | sctp_sock_init(g_hnb_gw.listen_fd.fd); |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 294 | |
| 295 | if (daemonize) { |
| 296 | rc = osmo_daemonize(); |
| 297 | if (rc < 0) { |
| 298 | perror("Error during daemonize"); |
| 299 | exit(1); |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | while (1) { |
| 304 | rc = osmo_select_main(0); |
| 305 | if (rc < 0) |
| 306 | exit(3); |
| 307 | } |
| 308 | |
| 309 | /* not reached */ |
| 310 | exit(0); |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 311 | } |