Holger Hans Peter Freyther | 13619dd | 2011-05-31 22:09:08 +0200 | [diff] [blame] | 1 | /* |
| 2 | * osmo-pcap-server code |
| 3 | * |
Holger Hans Peter Freyther | 6413e76 | 2016-08-26 15:24:40 +0200 | [diff] [blame] | 4 | * (C) 2011-2016 by Holger Hans Peter Freyther <holger@moiji-mobile.com> |
Holger Hans Peter Freyther | 13619dd | 2011-05-31 22:09:08 +0200 | [diff] [blame] | 5 | * (C) 2011 by On-Waves |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU Affero General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <osmo-pcap/osmo_pcap_server.h> |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 24 | #include <osmo-pcap/common.h> |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 25 | #include <osmo-pcap/wireformat.h> |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 26 | |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 27 | #include <osmocom/core/socket.h> |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 28 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 29 | #include <osmocom/core/rate_ctr.h> |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 30 | |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
| 32 | #include <sys/socket.h> |
| 33 | #include <sys/types.h> |
| 34 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 35 | #include <zmq.h> |
| 36 | |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 37 | #include <fcntl.h> |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 38 | #include <errno.h> |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 39 | #include <string.h> |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 40 | #include <unistd.h> |
| 41 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 42 | static void pcap_zmq_send(void *publ, const void *data, size_t len, int flags) |
| 43 | { |
| 44 | int rc; |
| 45 | zmq_msg_t msg; |
| 46 | |
| 47 | rc = zmq_msg_init_size(&msg, len); |
| 48 | if (rc != 0) { |
| 49 | /* sigh.. we said SNDMORE but can't... */ |
| 50 | LOGP(DSERVER, LOGL_ERROR, "Failed to init rc=%d errno=%d/%s\n", |
| 51 | rc, errno, strerror(errno)); |
| 52 | return; |
| 53 | } |
| 54 | memcpy(zmq_msg_data(&msg), data, len); |
| 55 | rc = zmq_msg_send(&msg, publ, flags); |
| 56 | if (rc == -1) { |
| 57 | /* is the zmq_msg now owned? leak??? */ |
| 58 | LOGP(DSERVER, LOGL_ERROR, "Failed to send data rc=%d errno=%d/%s\n", |
| 59 | rc, errno, strerror(errno)); |
| 60 | return; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | static void client_event(struct osmo_pcap_conn *conn, |
| 65 | const char *event, const char *data) |
| 66 | { |
| 67 | char *event_name; |
| 68 | |
| 69 | if (!conn->server->zmq_publ) |
| 70 | return; |
| 71 | |
| 72 | /* |
| 73 | * This multi-part support is insane... so if we lose the first |
| 74 | * or the last part of the multipart message stuff is going out |
| 75 | * of sync. *great* As we can't do anything about it right now |
| 76 | * just close the eyese and send it. |
| 77 | */ |
| 78 | event_name = talloc_asprintf(conn, "event.v1.%s.%s", |
| 79 | event, conn->name); |
| 80 | pcap_zmq_send(conn->server->zmq_publ, |
| 81 | event_name, strlen(event_name), |
| 82 | data ? ZMQ_SNDMORE : 0); |
| 83 | talloc_free(event_name); |
| 84 | if (data) |
| 85 | pcap_zmq_send(conn->server->zmq_publ, data, strlen(data), 0); |
| 86 | } |
| 87 | |
| 88 | static void client_data(struct osmo_pcap_conn *conn, |
| 89 | struct osmo_pcap_data *data) |
| 90 | { |
| 91 | char *event_name; |
| 92 | |
| 93 | if (!conn->server->zmq_publ) |
| 94 | return; |
| 95 | |
| 96 | /* |
| 97 | * This multi-part support is insane... so if we lose the first |
| 98 | * or the last part of the multipart message stuff is going out |
| 99 | * of sync. *great* As we can't do anything about it right now |
| 100 | * just close the eyese and send it. |
| 101 | */ |
| 102 | event_name = talloc_asprintf(conn, "data.v1.%s", conn->name); |
| 103 | pcap_zmq_send(conn->server->zmq_publ, event_name, strlen(event_name), ZMQ_SNDMORE); |
| 104 | talloc_free(event_name); |
| 105 | |
| 106 | pcap_zmq_send(conn->server->zmq_publ, |
| 107 | &conn->file_hdr, sizeof(conn->file_hdr), |
| 108 | ZMQ_SNDMORE); |
| 109 | pcap_zmq_send(conn->server->zmq_publ, |
| 110 | &data->data[0], data->len, |
| 111 | 0); |
| 112 | } |
| 113 | |
| 114 | void osmo_pcap_server_close_trace(struct osmo_pcap_conn *conn) |
| 115 | { |
| 116 | if (conn->local_fd >= 0) { |
| 117 | close(conn->local_fd); |
| 118 | conn->local_fd = -1; |
| 119 | } |
| 120 | |
| 121 | if (conn->curr_filename) { |
| 122 | client_event(conn, "closingtracefile", conn->curr_filename); |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 123 | rate_ctr_inc(&conn->ctrg->ctr[PEER_CTR_PROTATE]); |
| 124 | rate_ctr_inc(&conn->server->ctrg->ctr[SERVER_CTR_PROTATE]); |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 125 | talloc_free(conn->curr_filename); |
| 126 | conn->curr_filename = NULL; |
| 127 | } |
| 128 | } |
| 129 | |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 130 | static void close_connection(struct osmo_pcap_conn *conn) |
| 131 | { |
Holger Hans Peter Freyther | 098850d | 2016-08-26 19:31:16 +0200 | [diff] [blame] | 132 | if (conn->rem_wq.bfd.fd >= 0) { |
| 133 | close(conn->rem_wq.bfd.fd); |
| 134 | conn->rem_wq.bfd.fd = -1; |
Holger Hans Peter Freyther | 9ea4da4 | 2016-09-06 11:38:56 +0200 | [diff] [blame] | 135 | osmo_tls_release(&conn->tls_session); |
Holger Hans Peter Freyther | 098850d | 2016-08-26 19:31:16 +0200 | [diff] [blame] | 136 | osmo_fd_unregister(&conn->rem_wq.bfd); |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 137 | } |
| 138 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 139 | osmo_pcap_server_close_trace(conn); |
| 140 | client_event(conn, "disconnect", NULL); |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 141 | } |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 142 | |
Holger Hans Peter Freyther | 1bec9d5 | 2016-09-06 11:01:50 +0200 | [diff] [blame] | 143 | void osmo_pcap_server_close_conn(struct osmo_pcap_conn *conn) |
| 144 | { |
| 145 | return close_connection(conn); |
| 146 | } |
| 147 | |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 148 | static void restart_pcap(struct osmo_pcap_conn *conn) |
| 149 | { |
| 150 | time_t now = time(NULL); |
| 151 | struct tm *tm = localtime(&now); |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 152 | int rc; |
| 153 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 154 | osmo_pcap_server_close_trace(conn); |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 155 | |
Holger Hans Peter Freyther | 2899428 | 2016-08-04 16:14:38 +0200 | [diff] [blame] | 156 | /* omit any storing/creation of the file */ |
| 157 | if (conn->no_store) { |
| 158 | conn->last_write = *tm; |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 159 | talloc_free(conn->curr_filename); |
| 160 | conn->curr_filename = NULL; |
Holger Hans Peter Freyther | 2899428 | 2016-08-04 16:14:38 +0200 | [diff] [blame] | 161 | return; |
| 162 | } |
| 163 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 164 | conn->curr_filename = talloc_asprintf(conn, "%s/trace-%s-%d%.2d%.2d_%.2d%.2d%.2d.pcap", |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 165 | conn->server->base_path, conn->name, |
| 166 | tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, |
| 167 | tm->tm_hour, tm->tm_min, tm->tm_sec); |
Daniel Willmann | de77386 | 2011-07-17 17:48:17 +0200 | [diff] [blame] | 168 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 169 | if (!conn->curr_filename) { |
Daniel Willmann | de77386 | 2011-07-17 17:48:17 +0200 | [diff] [blame] | 170 | LOGP(DSERVER, LOGL_ERROR, "Failed to assemble filename for %s.\n", conn->name); |
| 171 | return; |
| 172 | } |
| 173 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 174 | conn->local_fd = creat(conn->curr_filename, 0440); |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 175 | if (conn->local_fd < 0) { |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 176 | LOGP(DSERVER, LOGL_ERROR, "Failed to file: '%s'\n", conn->curr_filename); |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 177 | return; |
| 178 | } |
| 179 | |
| 180 | rc = write(conn->local_fd, &conn->file_hdr, sizeof(conn->file_hdr)); |
| 181 | if (rc != sizeof(conn->file_hdr)) { |
| 182 | LOGP(DSERVER, LOGL_ERROR, "Failed to write the header: %d\n", errno); |
| 183 | close(conn->local_fd); |
| 184 | conn->local_fd = -1; |
| 185 | return; |
| 186 | } |
| 187 | |
| 188 | conn->last_write = *tm; |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 189 | } |
| 190 | |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 191 | static int link_data(struct osmo_pcap_conn *conn, struct osmo_pcap_data *data) |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 192 | { |
| 193 | struct pcap_file_header *hdr; |
| 194 | |
| 195 | if (data->len != sizeof(*hdr)) { |
| 196 | LOGP(DSERVER, LOGL_ERROR, "The pcap_file_header does not fit.\n"); |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 197 | return -1; |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | hdr = (struct pcap_file_header *) &data->data[0]; |
Holger Hans Peter Freyther | 2899428 | 2016-08-04 16:14:38 +0200 | [diff] [blame] | 201 | if (!conn->no_store && conn->local_fd < 0) { |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 202 | conn->file_hdr = *hdr; |
| 203 | restart_pcap(conn); |
| 204 | } else if (memcmp(&conn->file_hdr, hdr, sizeof(*hdr)) != 0) { |
| 205 | conn->file_hdr = *hdr; |
| 206 | restart_pcap(conn); |
| 207 | } |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 208 | |
| 209 | return 1; |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Check if we are past the limit or on a day change |
| 214 | */ |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 215 | static int write_data(struct osmo_pcap_conn *conn, struct osmo_pcap_data *data) |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 216 | { |
| 217 | time_t now = time(NULL); |
| 218 | struct tm *tm = localtime(&now); |
| 219 | int rc; |
| 220 | |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 221 | client_data(conn, data); |
| 222 | |
Holger Hans Peter Freyther | 2899428 | 2016-08-04 16:14:38 +0200 | [diff] [blame] | 223 | if (conn->no_store) { |
| 224 | conn->last_write = *tm; |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 225 | return 1; |
Holger Hans Peter Freyther | 2899428 | 2016-08-04 16:14:38 +0200 | [diff] [blame] | 226 | } |
| 227 | |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 228 | if (conn->local_fd < -1) { |
| 229 | LOGP(DSERVER, LOGL_ERROR, "No file is open. close connection.\n"); |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 230 | return -1; |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | off_t cur = lseek(conn->local_fd, 0, SEEK_CUR); |
| 234 | if (cur > conn->server->max_size) { |
| 235 | LOGP(DSERVER, LOGL_NOTICE, "Rolling over file for %s\n", conn->name); |
| 236 | restart_pcap(conn); |
| 237 | } else if (conn->last_write.tm_mday != tm->tm_mday || |
| 238 | conn->last_write.tm_mon != tm->tm_mon || |
| 239 | conn->last_write.tm_year != tm->tm_year) { |
| 240 | LOGP(DSERVER, LOGL_NOTICE, "Rolling over file for %s\n", conn->name); |
| 241 | restart_pcap(conn); |
| 242 | } |
| 243 | |
| 244 | conn->last_write = *tm; |
| 245 | rc = write(conn->local_fd, &data->data[0], data->len); |
| 246 | if (rc != data->len) { |
| 247 | LOGP(DSERVER, LOGL_ERROR, "Failed to write for %s\n", conn->name); |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 248 | return -1; |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 249 | } |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 250 | return 1; |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 254 | void osmo_pcap_server_delete(struct osmo_pcap_conn *conn) |
| 255 | { |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 256 | close_connection(conn); |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 257 | llist_del(&conn->entry); |
| 258 | talloc_free(conn); |
| 259 | } |
| 260 | |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 261 | struct osmo_pcap_conn *osmo_pcap_server_find(struct osmo_pcap_server *server, |
| 262 | const char *name) |
| 263 | { |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 264 | struct rate_ctr_group_desc *desc; |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 265 | struct osmo_pcap_conn *conn; |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 266 | |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 267 | llist_for_each_entry(conn, &server->conn, entry) { |
| 268 | if (strcmp(conn->name, name) == 0) |
| 269 | return conn; |
| 270 | } |
| 271 | |
| 272 | conn = talloc_zero(server, struct osmo_pcap_conn); |
| 273 | if (!conn) { |
| 274 | LOGP(DSERVER, LOGL_ERROR, |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 275 | "Failed to allocate the connection peer=%s.\n", name); |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 276 | return NULL; |
| 277 | } |
| 278 | |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 279 | /* a bit nasty. we do not work with ids but names */ |
| 280 | desc = talloc_zero(conn, struct rate_ctr_group_desc); |
| 281 | if (!desc) { |
| 282 | LOGP(DSERVER, LOGL_ERROR, |
| 283 | "Failed to allocate rate ctr desc peer=%s\n", name); |
| 284 | talloc_free(conn); |
| 285 | return NULL; |
| 286 | } |
| 287 | memcpy(desc, &pcap_peer_group_desc, sizeof(pcap_peer_group_desc)); |
| 288 | desc->group_name_prefix = talloc_asprintf(desc, "pcap.peer.%s", name); |
| 289 | if (!desc->group_name_prefix) { |
| 290 | LOGP(DSERVER, LOGL_ERROR, |
| 291 | "Failed to allocate group name prefix peer=%s\n", name); |
| 292 | talloc_free(conn); |
| 293 | return NULL; |
| 294 | } |
| 295 | desc->group_description = talloc_asprintf(desc, "PCAP peer statistics %s", name); |
| 296 | if (!desc->group_description) { |
| 297 | LOGP(DSERVER, LOGL_ERROR, |
| 298 | "Failed to allocate group description peer=%s\n", name); |
| 299 | talloc_free(conn); |
| 300 | return NULL; |
| 301 | } |
| 302 | |
| 303 | conn->ctrg = rate_ctr_group_alloc(desc, desc, 0); |
| 304 | if (!conn->ctrg) { |
| 305 | LOGP(DSERVER, LOGL_ERROR, |
| 306 | "Failed to allocate rate ctr peer=%s\n", name); |
| 307 | talloc_free(conn); |
| 308 | return NULL; |
| 309 | } |
| 310 | |
| 311 | |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 312 | conn->name = talloc_strdup(conn, name); |
Holger Hans Peter Freyther | 098850d | 2016-08-26 19:31:16 +0200 | [diff] [blame] | 313 | /* we never write */ |
| 314 | osmo_wqueue_init(&conn->rem_wq, 0); |
| 315 | conn->rem_wq.bfd.fd = -1; |
Holger Hans Peter Freyther | dc3d1dc | 2011-06-01 16:32:29 +0200 | [diff] [blame] | 316 | conn->local_fd = -1; |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 317 | conn->server = server; |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 318 | conn->data = (struct osmo_pcap_data *) &conn->buf[0]; |
Holger Hans Peter Freyther | 9f6127f | 2011-05-31 22:52:41 +0200 | [diff] [blame] | 319 | llist_add_tail(&conn->entry, &server->conn); |
| 320 | return conn; |
| 321 | } |
Holger Hans Peter Freyther | 13619dd | 2011-05-31 22:09:08 +0200 | [diff] [blame] | 322 | |
Holger Hans Peter Freyther | 9ea4da4 | 2016-09-06 11:38:56 +0200 | [diff] [blame] | 323 | static int do_read_tls(struct osmo_pcap_conn *conn, void *buf, size_t want_size) |
| 324 | { |
| 325 | size_t size = want_size; |
| 326 | if (conn->tls_limit_read && size > conn->tls_limit_read) |
| 327 | size = conn->tls_limit_read; |
| 328 | return gnutls_record_recv(conn->tls_session.session, buf, size); |
| 329 | } |
| 330 | |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 331 | static int do_read(struct osmo_pcap_conn *conn, void *buf, size_t size) |
| 332 | { |
Holger Hans Peter Freyther | 9ea4da4 | 2016-09-06 11:38:56 +0200 | [diff] [blame] | 333 | if (conn->direct_read) |
| 334 | return read(conn->rem_wq.bfd.fd, buf, size); |
| 335 | return do_read_tls(conn, buf, size); |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | static int read_cb_initial(struct osmo_pcap_conn *conn) |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 339 | { |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 340 | int rc; |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 341 | |
| 342 | rc = do_read(conn, &conn->buf[sizeof(*conn->data) - conn->pend], conn->pend); |
Holger Hans Peter Freyther | 91eaae3 | 2011-06-02 17:58:46 +0200 | [diff] [blame] | 343 | if (rc <= 0) { |
| 344 | LOGP(DSERVER, LOGL_ERROR, |
| 345 | "Too short packet. Got %d, wanted %d\n", rc, conn->data->len); |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 346 | return -1; |
| 347 | } |
| 348 | |
Holger Hans Peter Freyther | 91eaae3 | 2011-06-02 17:58:46 +0200 | [diff] [blame] | 349 | conn->pend -= rc; |
| 350 | if (conn->pend < 0) { |
| 351 | LOGP(DSERVER, LOGL_ERROR, |
| 352 | "Someone got the pending read wrong: %d\n", conn->pend); |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 353 | return -1; |
Holger Hans Peter Freyther | 91eaae3 | 2011-06-02 17:58:46 +0200 | [diff] [blame] | 354 | } else if (conn->pend == 0) { |
| 355 | conn->data->len = ntohs(conn->data->len); |
| 356 | |
Holger Hans Peter Freyther | ff1a5dc | 2015-12-03 19:32:04 +0100 | [diff] [blame] | 357 | if (conn->data->len > SERVER_MAX_DATA_SIZE) { |
Holger Hans Peter Freyther | 91eaae3 | 2011-06-02 17:58:46 +0200 | [diff] [blame] | 358 | LOGP(DSERVER, LOGL_ERROR, |
Holger Hans Peter Freyther | 26327bd | 2015-12-03 19:29:38 +0100 | [diff] [blame] | 359 | "Implausible data length: %u\n", conn->data->len); |
Holger Hans Peter Freyther | 91eaae3 | 2011-06-02 17:58:46 +0200 | [diff] [blame] | 360 | return -1; |
| 361 | } |
| 362 | |
| 363 | conn->state = STATE_DATA; |
| 364 | conn->pend = conn->data->len; |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 365 | } |
| 366 | |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 367 | return 1; |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 368 | } |
| 369 | |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 370 | static int read_cb_data(struct osmo_pcap_conn *conn) |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 371 | { |
| 372 | int rc; |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 373 | |
| 374 | rc = do_read(conn, &conn->data->data[conn->data->len - conn->pend], conn->pend); |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 375 | if (rc <= 0) { |
Holger Hans Peter Freyther | 59bfb58 | 2011-06-01 17:00:12 +0200 | [diff] [blame] | 376 | LOGP(DSERVER, LOGL_ERROR, |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 377 | "Too short packet. Got %d, wanted %d\n", rc, conn->data->len); |
Holger Hans Peter Freyther | 7309a90 | 2011-06-01 14:04:22 +0200 | [diff] [blame] | 378 | return -1; |
| 379 | } |
| 380 | |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 381 | conn->pend -= rc; |
| 382 | if (conn->pend < 0) { |
| 383 | LOGP(DSERVER, LOGL_ERROR, |
| 384 | "Someone got the pending read wrong: %d\n", conn->pend); |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 385 | return -1; |
| 386 | } else if (conn->pend == 0) { |
| 387 | conn->state = STATE_INITIAL; |
Holger Hans Peter Freyther | 91eaae3 | 2011-06-02 17:58:46 +0200 | [diff] [blame] | 388 | conn->pend = sizeof(*conn->data); |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 389 | |
| 390 | /* count the full packet we got */ |
| 391 | rate_ctr_inc(&conn->ctrg->ctr[PEER_CTR_PKTS]); |
| 392 | rate_ctr_inc(&conn->server->ctrg->ctr[SERVER_CTR_PKTS]); |
| 393 | |
| 394 | /* count the bytes of it */ |
| 395 | rate_ctr_add(&conn->ctrg->ctr[PEER_CTR_BYTES], conn->data->len); |
| 396 | rate_ctr_add(&conn->server->ctrg->ctr[SERVER_CTR_BYTES], conn->data->len); |
| 397 | |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 398 | switch (conn->data->type) { |
| 399 | case PKT_LINK_HDR: |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 400 | return link_data(conn, conn->data); |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 401 | break; |
| 402 | case PKT_LINK_DATA: |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 403 | return write_data(conn, conn->data); |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 404 | break; |
| 405 | } |
| 406 | } |
| 407 | |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 408 | return 1; |
| 409 | } |
| 410 | |
| 411 | static int dispatch_read(struct osmo_pcap_conn *conn) |
| 412 | { |
| 413 | if (conn->state == STATE_INITIAL) { |
| 414 | if (conn->reopen) { |
| 415 | LOGP(DSERVER, LOGL_INFO, "Reopening log for %s now.\n", conn->name); |
| 416 | restart_pcap(conn); |
| 417 | conn->reopen = 0; |
| 418 | } |
| 419 | return read_cb_initial(conn); |
| 420 | } else if (conn->state == STATE_DATA) { |
| 421 | return read_cb_data(conn); |
| 422 | } |
| 423 | |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 424 | return 0; |
| 425 | } |
| 426 | |
Holger Hans Peter Freyther | 098850d | 2016-08-26 19:31:16 +0200 | [diff] [blame] | 427 | static int read_cb(struct osmo_fd *fd) |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 428 | { |
| 429 | struct osmo_pcap_conn *conn; |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 430 | int rc; |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 431 | |
| 432 | conn = fd->data; |
Holger Hans Peter Freyther | 064d224 | 2016-09-06 11:08:19 +0200 | [diff] [blame] | 433 | rc = dispatch_read(conn); |
| 434 | if (rc <= 0) |
| 435 | close_connection(conn); |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 436 | return 0; |
| 437 | } |
| 438 | |
Holger Hans Peter Freyther | 9ea4da4 | 2016-09-06 11:38:56 +0200 | [diff] [blame] | 439 | static void tls_error_cb(struct osmo_tls_session *session) |
| 440 | { |
| 441 | struct osmo_pcap_conn *conn; |
| 442 | conn = container_of(session, struct osmo_pcap_conn, tls_session); |
| 443 | close_connection(conn); |
| 444 | } |
| 445 | |
| 446 | static int tls_read_cb(struct osmo_tls_session *session) |
| 447 | { |
| 448 | struct osmo_pcap_conn *conn; |
| 449 | size_t pend; |
| 450 | int rc; |
| 451 | |
| 452 | conn = container_of(session, struct osmo_pcap_conn, tls_session); |
| 453 | conn->tls_limit_read = 0; |
| 454 | rc = dispatch_read(conn); |
| 455 | if (rc <= 0) |
| 456 | return rc; |
| 457 | |
| 458 | /** |
| 459 | * This is a weakness of a single select approach and the |
| 460 | * buffered reading here. We need to read everything as |
| 461 | * otherwise we do not receive a ready-read. But at the |
| 462 | * same time don't read more than is buffered! So cap what |
| 463 | * can be read right now. |
| 464 | */ |
| 465 | while ((pend = osmo_tls_pending(session)) > 0) { |
| 466 | conn->tls_limit_read = pend; |
| 467 | rc = dispatch_read(conn); |
| 468 | if (rc <= 0) |
| 469 | return rc; |
| 470 | } |
| 471 | |
| 472 | return 1; |
| 473 | } |
| 474 | |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 475 | static void new_connection(struct osmo_pcap_server *server, |
| 476 | struct osmo_pcap_conn *client, int new_fd) |
| 477 | { |
| 478 | close_connection(client); |
| 479 | |
| 480 | memset(&client->file_hdr, 0, sizeof(client->file_hdr)); |
Holger Hans Peter Freyther | 098850d | 2016-08-26 19:31:16 +0200 | [diff] [blame] | 481 | client->rem_wq.bfd.fd = new_fd; |
| 482 | if (osmo_fd_register(&client->rem_wq.bfd) != 0) { |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 483 | LOGP(DSERVER, LOGL_ERROR, "Failed to register fd.\n"); |
Holger Hans Peter Freyther | 098850d | 2016-08-26 19:31:16 +0200 | [diff] [blame] | 484 | client->rem_wq.bfd.fd = -1; |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 485 | close(new_fd); |
| 486 | return; |
| 487 | } |
| 488 | |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 489 | rate_ctr_inc(&client->ctrg->ctr[PEER_CTR_CONNECT]); |
| 490 | |
Holger Hans Peter Freyther | 39d904f | 2011-06-01 18:49:07 +0200 | [diff] [blame] | 491 | client->state = STATE_INITIAL; |
Holger Hans Peter Freyther | 91eaae3 | 2011-06-02 17:58:46 +0200 | [diff] [blame] | 492 | client->pend = sizeof(*client->data); |
Holger Hans Peter Freyther | 9ea4da4 | 2016-09-06 11:38:56 +0200 | [diff] [blame] | 493 | |
Holger Hans Peter Freyther | cf29fd7 | 2016-09-06 20:27:32 +0200 | [diff] [blame] | 494 | if (client->tls_use && !server->tls_on) { |
| 495 | LOGP(DSERVER, LOGL_NOTICE, |
| 496 | "Require TLS but not enabled on conn=%s\n", |
| 497 | client->name); |
| 498 | close_connection(client); |
| 499 | return; |
| 500 | } else if (client->tls_use) { |
Holger Hans Peter Freyther | 9ea4da4 | 2016-09-06 11:38:56 +0200 | [diff] [blame] | 501 | if (!osmo_tls_init_server_session(client, server)) { |
| 502 | close_connection(client); |
| 503 | return; |
| 504 | } |
| 505 | client->tls_session.error = tls_error_cb; |
| 506 | client->tls_session.read = tls_read_cb; |
| 507 | client->direct_read = false; |
| 508 | } else { |
| 509 | client->rem_wq.bfd.cb = osmo_wqueue_bfd_cb; |
| 510 | client->rem_wq.bfd.data = client; |
| 511 | client->rem_wq.bfd.when = BSC_FD_READ; |
| 512 | client->rem_wq.read_cb = read_cb; |
| 513 | client->direct_read = true; |
| 514 | } |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | static int accept_cb(struct osmo_fd *fd, unsigned int when) |
| 518 | { |
| 519 | struct osmo_pcap_conn *conn; |
| 520 | struct osmo_pcap_server *server; |
| 521 | struct sockaddr_in addr; |
| 522 | socklen_t size = sizeof(addr); |
| 523 | int new_fd; |
| 524 | |
| 525 | new_fd = accept(fd->fd, (struct sockaddr *) &addr, &size); |
| 526 | if (new_fd < 0) { |
| 527 | LOGP(DSERVER, LOGL_ERROR, "Failed to accept socket: %d\n", errno); |
| 528 | return -1; |
| 529 | } |
| 530 | |
| 531 | server = fd->data; |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 532 | |
| 533 | /* count any accept to see no clients */ |
| 534 | rate_ctr_inc(&server->ctrg->ctr[SERVER_CTR_CONNECT]); |
| 535 | |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 536 | llist_for_each_entry(conn, &server->conn, entry) { |
| 537 | if (conn->remote_addr.s_addr == addr.sin_addr.s_addr) { |
| 538 | LOGP(DSERVER, LOGL_NOTICE, |
| 539 | "New connection from %s\n", conn->name); |
Holger Hans Peter Freyther | e024869 | 2016-08-05 15:47:08 +0200 | [diff] [blame] | 540 | client_event(conn, "connect", NULL); |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 541 | new_connection(server, conn, new_fd); |
| 542 | return 0; |
| 543 | } |
| 544 | } |
| 545 | |
Holger Hans Peter Freyther | 99526a6 | 2016-08-19 19:15:39 +0200 | [diff] [blame] | 546 | rate_ctr_inc(&server->ctrg->ctr[SERVER_CTR_NOCLIENT]); |
Holger Hans Peter Freyther | 9ea4da4 | 2016-09-06 11:38:56 +0200 | [diff] [blame] | 547 | |
| 548 | /* |
| 549 | * TODO: In the future start with a tls handshake and see if we know |
| 550 | * this client. |
| 551 | */ |
| 552 | |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 553 | LOGP(DSERVER, LOGL_ERROR, |
| 554 | "Failed to find client for %s\n", inet_ntoa(addr.sin_addr)); |
| 555 | close(new_fd); |
| 556 | return -1; |
| 557 | } |
| 558 | |
Holger Hans Peter Freyther | 13619dd | 2011-05-31 22:09:08 +0200 | [diff] [blame] | 559 | int osmo_pcap_server_listen(struct osmo_pcap_server *server) |
| 560 | { |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 561 | int fd; |
| 562 | |
| 563 | fd = osmo_sock_init(AF_INET, SOCK_STREAM, IPPROTO_TCP, |
Daniel Willmann | b000368 | 2011-07-17 17:48:19 +0200 | [diff] [blame] | 564 | server->addr, server->port, OSMO_SOCK_F_BIND); |
Holger Hans Peter Freyther | 80b8b60 | 2011-05-31 23:42:20 +0200 | [diff] [blame] | 565 | if (fd < 0) { |
| 566 | LOGP(DSERVER, LOGL_ERROR, "Failed to create the server socket.\n"); |
| 567 | return -1; |
| 568 | } |
| 569 | |
| 570 | server->listen_fd.fd = fd; |
| 571 | server->listen_fd.when = BSC_FD_READ; |
| 572 | server->listen_fd.cb = accept_cb; |
| 573 | server->listen_fd.data = server; |
| 574 | |
| 575 | if (osmo_fd_register(&server->listen_fd) != 0) { |
| 576 | LOGP(DSERVER, LOGL_ERROR, "Failed to register the socket.\n"); |
| 577 | close(fd); |
| 578 | return -1; |
| 579 | } |
| 580 | |
| 581 | return 0; |
Holger Hans Peter Freyther | 13619dd | 2011-05-31 22:09:08 +0200 | [diff] [blame] | 582 | } |
Daniel Willmann | c7401c6 | 2011-07-17 17:48:18 +0200 | [diff] [blame] | 583 | |
| 584 | void osmo_pcap_server_reopen(struct osmo_pcap_server *server) |
| 585 | { |
| 586 | struct osmo_pcap_conn *conn; |
| 587 | LOGP(DSERVER, LOGL_INFO, "Reopening all logfiles.\n"); |
| 588 | llist_for_each_entry(conn, &server->conn, entry) { |
| 589 | /* Write the complete packet out first */ |
| 590 | if (conn->state == STATE_INITIAL) { |
| 591 | restart_pcap(conn); |
| 592 | } else { |
| 593 | LOGP(DSERVER, LOGL_INFO, "Delaying %s until current packet is complete.\n", conn->name); |
| 594 | conn->reopen = 1; |
| 595 | } |
| 596 | } |
| 597 | } |