| File: | src/usr.sbin/smtpd/smtpd/../mta_session.c |
| Warning: | line 1535, column 7 Although the value stored to 'len' is used in the enclosing expression, the value is never actually read from 'len' |
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| 1 | /* $OpenBSD: mta_session.c,v 1.150 2024/01/03 08:11:15 op Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org> |
| 5 | * Copyright (c) 2008 Gilles Chehade <gilles@poolp.org> |
| 6 | * Copyright (c) 2009 Jacek Masiulaniec <jacekm@dobremiasto.net> |
| 7 | * Copyright (c) 2012 Eric Faurot <eric@openbsd.org> |
| 8 | * |
| 9 | * Permission to use, copy, modify, and distribute this software for any |
| 10 | * purpose with or without fee is hereby granted, provided that the above |
| 11 | * copyright notice and this permission notice appear in all copies. |
| 12 | * |
| 13 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 19 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | #include <sys/stat.h> |
| 23 | |
| 24 | #include <ctype.h> |
| 25 | #include <errno(*__errno()).h> |
| 26 | #include <inttypes.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <time.h> |
| 30 | #include <tls.h> |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | #include "smtpd.h" |
| 34 | #include "log.h" |
| 35 | |
| 36 | #define MAX_TRYBEFOREDISABLE10 10 |
| 37 | |
| 38 | #define MTA_HIWAT65535 65535 |
| 39 | |
| 40 | enum mta_state { |
| 41 | MTA_INIT, |
| 42 | MTA_BANNER, |
| 43 | MTA_EHLO, |
| 44 | MTA_HELO, |
| 45 | MTA_LHLO, |
| 46 | MTA_STARTTLS, |
| 47 | MTA_AUTH, |
| 48 | MTA_AUTH_PLAIN, |
| 49 | MTA_AUTH_LOGIN, |
| 50 | MTA_AUTH_LOGIN_USER, |
| 51 | MTA_AUTH_LOGIN_PASS, |
| 52 | MTA_READY, |
| 53 | MTA_MAIL, |
| 54 | MTA_RCPT, |
| 55 | MTA_DATA, |
| 56 | MTA_BODY, |
| 57 | MTA_EOM, |
| 58 | MTA_LMTP_EOM, |
| 59 | MTA_RSET, |
| 60 | MTA_QUIT, |
| 61 | }; |
| 62 | |
| 63 | #define MTA_FORCE_ANYSSL0x0001 0x0001 |
| 64 | #define MTA_FORCE_SMTPS0x0002 0x0002 |
| 65 | #define MTA_FORCE_TLS0x0004 0x0004 |
| 66 | #define MTA_FORCE_PLAIN0x0008 0x0008 |
| 67 | #define MTA_WANT_SECURE0x0010 0x0010 |
| 68 | #define MTA_DOWNGRADE_PLAIN0x0080 0x0080 |
| 69 | |
| 70 | #define MTA_TLS0x0100 0x0100 |
| 71 | #define MTA_TLS_VERIFIED0x0200 0x0200 |
| 72 | |
| 73 | #define MTA_FREE0x0400 0x0400 |
| 74 | #define MTA_LMTP0x0800 0x0800 |
| 75 | #define MTA_WAIT0x1000 0x1000 |
| 76 | #define MTA_HANGON0x2000 0x2000 |
| 77 | #define MTA_RECONN0x4000 0x4000 |
| 78 | |
| 79 | #define MTA_EXT_STARTTLS0x01 0x01 |
| 80 | #define MTA_EXT_PIPELINING0x02 0x02 |
| 81 | #define MTA_EXT_AUTH0x04 0x04 |
| 82 | #define MTA_EXT_AUTH_PLAIN0x08 0x08 |
| 83 | #define MTA_EXT_AUTH_LOGIN0x10 0x10 |
| 84 | #define MTA_EXT_SIZE0x20 0x20 |
| 85 | |
| 86 | struct mta_session { |
| 87 | uint64_t id; |
| 88 | struct mta_relay *relay; |
| 89 | struct mta_route *route; |
| 90 | char *helo; |
| 91 | char *mxname; |
| 92 | |
| 93 | char *username; |
| 94 | |
| 95 | int flags; |
| 96 | |
| 97 | int attempt; |
| 98 | int use_smtps; |
| 99 | int use_starttls; |
| 100 | int use_smtp_tls; |
| 101 | int ready; |
| 102 | |
| 103 | struct event ev; |
| 104 | struct io *io; |
| 105 | int ext; |
| 106 | |
| 107 | size_t ext_size; |
| 108 | |
| 109 | size_t msgtried; |
| 110 | size_t msgcount; |
| 111 | size_t rcptcount; |
| 112 | int hangon; |
| 113 | |
| 114 | enum mta_state state; |
| 115 | struct mta_task *task; |
| 116 | struct mta_envelope *currevp; |
| 117 | FILE *datafp; |
| 118 | size_t datalen; |
| 119 | |
| 120 | size_t failures; |
| 121 | |
| 122 | char replybuf[2048]; |
| 123 | }; |
| 124 | |
| 125 | static void mta_session_init(void); |
| 126 | static void mta_start(int fd, short ev, void *arg); |
| 127 | static void mta_io(struct io *, int, void *); |
| 128 | static void mta_free(struct mta_session *); |
| 129 | static void mta_getnameinfo_cb(void *, int, const char *, const char *); |
| 130 | static void mta_on_ptr(void *, void *, void *); |
| 131 | static void mta_on_timeout(struct runq *, void *); |
| 132 | static void mta_connect(struct mta_session *); |
| 133 | static void mta_enter_state(struct mta_session *, int); |
| 134 | static void mta_flush_task(struct mta_session *, int, const char *, size_t, int); |
| 135 | static void mta_error(struct mta_session *, const char *, ...) |
| 136 | __attribute__((__format__ (printf, 2, 3))); |
| 137 | static void mta_send(struct mta_session *, char *, ...) |
| 138 | __attribute__((__format__ (printf, 2, 3))); |
| 139 | static ssize_t mta_queue_data(struct mta_session *); |
| 140 | static void mta_response(struct mta_session *, char *); |
| 141 | static const char * mta_strstate(int); |
| 142 | static void mta_tls_init(struct mta_session *); |
| 143 | static void mta_tls_started(struct mta_session *); |
| 144 | static struct mta_session *mta_tree_pop(struct tree *, uint64_t); |
| 145 | static const char * dsn_strret(enum dsn_ret); |
| 146 | static const char * dsn_strnotify(uint8_t); |
| 147 | |
| 148 | void mta_hoststat_update(const char *, const char *); |
| 149 | void mta_hoststat_reschedule(const char *); |
| 150 | void mta_hoststat_cache(const char *, uint64_t); |
| 151 | void mta_hoststat_uncache(const char *, uint64_t); |
| 152 | |
| 153 | |
| 154 | static void mta_filter_begin(struct mta_session *); |
| 155 | static void mta_filter_end(struct mta_session *); |
| 156 | static void mta_connected(struct mta_session *); |
| 157 | static void mta_disconnected(struct mta_session *); |
| 158 | |
| 159 | static void mta_report_link_connect(struct mta_session *, const char *, int, |
| 160 | const struct sockaddr_storage *, |
| 161 | const struct sockaddr_storage *); |
| 162 | static void mta_report_link_greeting(struct mta_session *, const char *); |
| 163 | static void mta_report_link_identify(struct mta_session *, const char *, const char *); |
| 164 | static void mta_report_link_tls(struct mta_session *, const char *); |
| 165 | static void mta_report_link_disconnect(struct mta_session *); |
| 166 | static void mta_report_link_auth(struct mta_session *, const char *, const char *); |
| 167 | static void mta_report_tx_reset(struct mta_session *, uint32_t); |
| 168 | static void mta_report_tx_begin(struct mta_session *, uint32_t); |
| 169 | static void mta_report_tx_mail(struct mta_session *, uint32_t, const char *, int); |
| 170 | static void mta_report_tx_rcpt(struct mta_session *, uint32_t, const char *, int); |
| 171 | static void mta_report_tx_envelope(struct mta_session *, uint32_t, uint64_t); |
| 172 | static void mta_report_tx_data(struct mta_session *, uint32_t, int); |
| 173 | static void mta_report_tx_commit(struct mta_session *, uint32_t, size_t); |
| 174 | static void mta_report_tx_rollback(struct mta_session *, uint32_t); |
| 175 | static void mta_report_protocol_client(struct mta_session *, const char *); |
| 176 | static void mta_report_protocol_server(struct mta_session *, const char *); |
| 177 | #if 0 |
| 178 | static void mta_report_filter_response(struct mta_session *, int, int, const char *); |
| 179 | #endif |
| 180 | static void mta_report_timeout(struct mta_session *); |
| 181 | |
| 182 | |
| 183 | static struct tree wait_helo; |
| 184 | static struct tree wait_ptr; |
| 185 | static struct tree wait_fd; |
| 186 | static struct tree wait_tls_init; |
| 187 | static struct tree wait_tls_verify; |
| 188 | |
| 189 | static struct runq *hangon; |
| 190 | |
| 191 | #define SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername) \ |
| 192 | ((s)->relay->dispatcher->u.remote.filtername) |
| 193 | |
| 194 | static void |
| 195 | mta_session_init(void) |
| 196 | { |
| 197 | static int init = 0; |
| 198 | |
| 199 | if (!init) { |
| 200 | tree_init(&wait_helo)do { do { (&((&wait_helo)->tree))->sph_root = ( (void *)0); } while (0); (&wait_helo)->count = 0; } while (0); |
| 201 | tree_init(&wait_ptr)do { do { (&((&wait_ptr)->tree))->sph_root = (( void *)0); } while (0); (&wait_ptr)->count = 0; } while (0); |
| 202 | tree_init(&wait_fd)do { do { (&((&wait_fd)->tree))->sph_root = ((void *)0); } while (0); (&wait_fd)->count = 0; } while(0); |
| 203 | tree_init(&wait_tls_init)do { do { (&((&wait_tls_init)->tree))->sph_root = ((void *)0); } while (0); (&wait_tls_init)->count = 0; } while(0); |
| 204 | tree_init(&wait_tls_verify)do { do { (&((&wait_tls_verify)->tree))->sph_root = ((void *)0); } while (0); (&wait_tls_verify)->count = 0; } while(0); |
| 205 | runq_init(&hangon, mta_on_timeout); |
| 206 | init = 1; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | void |
| 211 | mta_session(struct mta_relay *relay, struct mta_route *route, const char *mxname) |
| 212 | { |
| 213 | struct mta_session *s; |
| 214 | struct timeval tv; |
| 215 | |
| 216 | mta_session_init(); |
| 217 | |
| 218 | s = xcalloc(1, sizeof *s); |
| 219 | s->id = generate_uid(); |
| 220 | s->relay = relay; |
| 221 | s->route = route; |
| 222 | s->mxname = xstrdup(mxname); |
| 223 | |
| 224 | mta_filter_begin(s); |
| 225 | |
| 226 | if (relay->flags & RELAY_LMTP0x80) |
| 227 | s->flags |= MTA_LMTP0x0800; |
| 228 | switch (relay->tls) { |
| 229 | case RELAY_TLS_SMTPS2: |
| 230 | s->flags |= MTA_FORCE_SMTPS0x0002; |
| 231 | s->flags |= MTA_WANT_SECURE0x0010; |
| 232 | break; |
| 233 | case RELAY_TLS_STARTTLS1: |
| 234 | s->flags |= MTA_FORCE_TLS0x0004; |
| 235 | s->flags |= MTA_WANT_SECURE0x0010; |
| 236 | break; |
| 237 | case RELAY_TLS_OPPORTUNISTIC0: |
| 238 | /* do not force anything, try tls then smtp */ |
| 239 | break; |
| 240 | case RELAY_TLS_NO3: |
| 241 | s->flags |= MTA_FORCE_PLAIN0x0008; |
| 242 | break; |
| 243 | default: |
| 244 | fatalx("bad value for relay->tls: %d", relay->tls); |
| 245 | } |
| 246 | |
| 247 | log_debug("debug: mta: %p: spawned for relay %s", s, |
| 248 | mta_relay_to_text(relay)); |
| 249 | stat_increment("mta.session", 1); |
| 250 | |
| 251 | if (route->dst->ptrname || route->dst->lastptrquery) { |
| 252 | /* We want to delay the connection since to always notify |
| 253 | * the relay asynchronously. |
| 254 | */ |
| 255 | tv.tv_sec = 0; |
| 256 | tv.tv_usec = 0; |
| 257 | evtimer_set(&s->ev, mta_start, s)event_set(&s->ev, -1, 0, mta_start, s); |
| 258 | evtimer_add(&s->ev, &tv)event_add(&s->ev, &tv); |
| 259 | } else if (waitq_wait(&route->dst->ptrname, mta_on_ptr, s)) { |
| 260 | resolver_getnameinfo(s->route->dst->sa, NI_NUMERICSERV2, |
| 261 | mta_getnameinfo_cb, s); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | void |
| 266 | mta_session_imsg(struct mproc *p, struct imsg *imsg) |
| 267 | { |
| 268 | struct mta_session *s; |
| 269 | struct msg m; |
| 270 | uint64_t reqid; |
| 271 | const char *name; |
| 272 | int status; |
| 273 | struct stat sb; |
| 274 | |
| 275 | switch (imsg->hdr.type) { |
| 276 | |
| 277 | case IMSG_MTA_OPEN_MESSAGE: |
| 278 | m_msg(&m, imsg); |
| 279 | m_get_id(&m, &reqid); |
| 280 | m_end(&m); |
| 281 | |
| 282 | s = mta_tree_pop(&wait_fd, reqid); |
| 283 | if (s == NULL((void *)0)) { |
| 284 | if (imsg->fd != -1) |
| 285 | close(imsg->fd); |
| 286 | return; |
| 287 | } |
| 288 | |
| 289 | if (imsg->fd == -1) { |
| 290 | log_debug("debug: mta: failed to obtain msg fd"); |
| 291 | mta_flush_task(s, IMSG_MTA_DELIVERY_TEMPFAIL, |
| 292 | "Could not get message fd", 0, 0); |
| 293 | mta_enter_state(s, MTA_READY); |
| 294 | return; |
| 295 | } |
| 296 | |
| 297 | if ((s->ext & MTA_EXT_SIZE0x20) && s->ext_size != 0) { |
| 298 | if (fstat(imsg->fd, &sb) == -1) { |
| 299 | log_debug("debug: mta: failed to stat msg fd"); |
| 300 | mta_flush_task(s, IMSG_MTA_DELIVERY_TEMPFAIL, |
| 301 | "Could not stat message fd", 0, 0); |
| 302 | mta_enter_state(s, MTA_READY); |
| 303 | close(imsg->fd); |
| 304 | return; |
| 305 | } |
| 306 | if (sb.st_size > (off_t)s->ext_size) { |
| 307 | log_debug("debug: mta: message too large for peer"); |
| 308 | mta_flush_task(s, IMSG_MTA_DELIVERY_PERMFAIL, |
| 309 | "message too large for peer", 0, 0); |
| 310 | mta_enter_state(s, MTA_READY); |
| 311 | close(imsg->fd); |
| 312 | return; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | s->datafp = fdopen(imsg->fd, "r"); |
| 317 | if (s->datafp == NULL((void *)0)) |
| 318 | fatal("mta: fdopen"); |
| 319 | |
| 320 | mta_enter_state(s, MTA_MAIL); |
| 321 | return; |
| 322 | |
| 323 | case IMSG_MTA_LOOKUP_HELO: |
| 324 | m_msg(&m, imsg); |
| 325 | m_get_id(&m, &reqid); |
| 326 | m_get_int(&m, &status); |
| 327 | if (status == LKA_OK) |
| 328 | m_get_string(&m, &name); |
| 329 | m_end(&m); |
| 330 | |
| 331 | s = mta_tree_pop(&wait_helo, reqid); |
| 332 | if (s == NULL((void *)0)) |
| 333 | return; |
| 334 | |
| 335 | if (status == LKA_OK) { |
| 336 | s->helo = xstrdup(name); |
| 337 | mta_connect(s); |
| 338 | } else { |
| 339 | mta_source_error(s->relay, s->route, |
| 340 | "Failed to retrieve helo string"); |
| 341 | mta_free(s); |
| 342 | } |
| 343 | return; |
| 344 | |
| 345 | default: |
| 346 | fatalx("mta_session_imsg: unexpected %s imsg", |
| 347 | imsg_to_str(imsg->hdr.type)); |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | static struct mta_session * |
| 352 | mta_tree_pop(struct tree *wait, uint64_t reqid) |
| 353 | { |
| 354 | struct mta_session *s; |
| 355 | |
| 356 | s = tree_xpop(wait, reqid); |
| 357 | if (s->flags & MTA_FREE0x0400) { |
| 358 | log_debug("debug: mta: %p: zombie session", s); |
| 359 | mta_free(s); |
| 360 | return (NULL((void *)0)); |
| 361 | } |
| 362 | s->flags &= ~MTA_WAIT0x1000; |
| 363 | |
| 364 | return (s); |
| 365 | } |
| 366 | |
| 367 | static void |
| 368 | mta_free(struct mta_session *s) |
| 369 | { |
| 370 | struct mta_relay *relay; |
| 371 | struct mta_route *route; |
| 372 | |
| 373 | log_debug("debug: mta: %p: session done", s); |
| 374 | |
| 375 | mta_disconnected(s); |
| 376 | |
| 377 | if (s->ready) |
| 378 | s->relay->nconn_ready -= 1; |
| 379 | |
| 380 | if (s->flags & MTA_HANGON0x2000) { |
| 381 | log_debug("debug: mta: %p: cancelling hangon timer", s); |
| 382 | runq_cancel(hangon, s); |
| 383 | } |
| 384 | |
| 385 | if (s->io) |
| 386 | io_free(s->io); |
| 387 | |
| 388 | if (s->task) |
| 389 | fatalx("current task should have been deleted already"); |
| 390 | if (s->datafp) { |
| 391 | fclose(s->datafp); |
| 392 | s->datalen = 0; |
| 393 | } |
| 394 | free(s->helo); |
| 395 | |
| 396 | relay = s->relay; |
| 397 | route = s->route; |
| 398 | free(s->username); |
| 399 | free(s->mxname); |
| 400 | free(s); |
| 401 | stat_decrement("mta.session", 1); |
| 402 | mta_route_collect(relay, route); |
| 403 | } |
| 404 | |
| 405 | static void |
| 406 | mta_getnameinfo_cb(void *arg, int gaierrno, const char *host, const char *serv) |
| 407 | { |
| 408 | struct mta_session *s = arg; |
| 409 | struct mta_host *h; |
| 410 | |
| 411 | h = s->route->dst; |
| 412 | h->lastptrquery = time(NULL((void *)0)); |
| 413 | if (host) |
| 414 | h->ptrname = xstrdup(host); |
| 415 | waitq_run(&h->ptrname, h->ptrname); |
| 416 | } |
| 417 | |
| 418 | static void |
| 419 | mta_on_timeout(struct runq *runq, void *arg) |
| 420 | { |
| 421 | struct mta_session *s = arg; |
| 422 | |
| 423 | log_debug("mta: timeout for session hangon"); |
| 424 | |
| 425 | s->flags &= ~MTA_HANGON0x2000; |
| 426 | s->hangon++; |
| 427 | |
| 428 | mta_enter_state(s, MTA_READY); |
| 429 | } |
| 430 | |
| 431 | static void |
| 432 | mta_on_ptr(void *tag, void *arg, void *data) |
| 433 | { |
| 434 | struct mta_session *s = arg; |
| 435 | |
| 436 | mta_connect(s); |
| 437 | } |
| 438 | |
| 439 | static void |
| 440 | mta_start(int fd, short ev, void *arg) |
| 441 | { |
| 442 | struct mta_session *s = arg; |
| 443 | |
| 444 | mta_connect(s); |
| 445 | } |
| 446 | |
| 447 | static void |
| 448 | mta_connect(struct mta_session *s) |
| 449 | { |
| 450 | struct sockaddr_storage ss; |
| 451 | struct sockaddr *sa; |
| 452 | int portno; |
| 453 | const char *schema; |
| 454 | |
| 455 | if (s->helo == NULL((void *)0)) { |
| 456 | if (s->relay->helotable && s->route->src->sa) { |
| 457 | m_create(p_lka, IMSG_MTA_LOOKUP_HELO, 0, 0, -1); |
| 458 | m_add_id(p_lka, s->id); |
| 459 | m_add_string(p_lka, s->relay->helotable); |
| 460 | m_add_sockaddr(p_lka, s->route->src->sa); |
| 461 | m_close(p_lka); |
| 462 | tree_xset(&wait_helo, s->id, s); |
| 463 | s->flags |= MTA_WAIT0x1000; |
| 464 | return; |
| 465 | } |
| 466 | else if (s->relay->heloname) |
| 467 | s->helo = xstrdup(s->relay->heloname); |
| 468 | else |
| 469 | s->helo = xstrdup(env->sc_hostname); |
| 470 | } |
| 471 | |
| 472 | if (s->io) { |
| 473 | io_free(s->io); |
| 474 | s->io = NULL((void *)0); |
| 475 | } |
| 476 | |
| 477 | s->use_smtps = s->use_starttls = s->use_smtp_tls = 0; |
| 478 | |
| 479 | switch (s->attempt) { |
| 480 | case 0: |
| 481 | if (s->flags & MTA_FORCE_SMTPS0x0002) |
| 482 | s->use_smtps = 1; /* smtps */ |
| 483 | else if (s->flags & (MTA_FORCE_TLS0x0004|MTA_FORCE_ANYSSL0x0001)) |
| 484 | s->use_starttls = 1; /* tls, tls+smtps */ |
| 485 | else if (!(s->flags & MTA_FORCE_PLAIN0x0008)) |
| 486 | s->use_smtp_tls = 1; |
| 487 | break; |
| 488 | case 1: |
| 489 | if (s->flags & MTA_FORCE_ANYSSL0x0001) { |
| 490 | s->use_smtps = 1; /* tls+smtps */ |
| 491 | break; |
| 492 | } |
| 493 | else if (s->flags & MTA_DOWNGRADE_PLAIN0x0080) { |
| 494 | /* smtp, with tls failure */ |
| 495 | break; |
| 496 | } |
| 497 | default: |
| 498 | mta_free(s); |
| 499 | return; |
| 500 | } |
| 501 | portno = s->use_smtps ? 465 : 25; |
| 502 | |
| 503 | /* Override with relay-specified port */ |
| 504 | if (s->relay->port) |
| 505 | portno = s->relay->port; |
| 506 | |
| 507 | memmove(&ss, s->route->dst->sa, s->route->dst->sa->sa_len); |
| 508 | sa = (struct sockaddr *)&ss; |
| 509 | |
| 510 | if (sa->sa_family == AF_INET2) |
| 511 | ((struct sockaddr_in *)sa)->sin_port = htons(portno)(__uint16_t)(__builtin_constant_p(portno) ? (__uint16_t)(((__uint16_t )(portno) & 0xffU) << 8 | ((__uint16_t)(portno) & 0xff00U) >> 8) : __swap16md(portno)); |
| 512 | else if (sa->sa_family == AF_INET624) |
| 513 | ((struct sockaddr_in6 *)sa)->sin6_port = htons(portno)(__uint16_t)(__builtin_constant_p(portno) ? (__uint16_t)(((__uint16_t )(portno) & 0xffU) << 8 | ((__uint16_t)(portno) & 0xff00U) >> 8) : __swap16md(portno)); |
| 514 | |
| 515 | s->attempt += 1; |
| 516 | if (s->use_smtp_tls) |
| 517 | schema = "smtp://"; |
| 518 | else if (s->use_starttls) |
| 519 | schema = "smtp+tls://"; |
| 520 | else if (s->use_smtps) |
| 521 | schema = "smtps://"; |
| 522 | else if (s->flags & MTA_LMTP0x0800) |
| 523 | schema = "lmtp://"; |
| 524 | else |
| 525 | schema = "smtp+notls://"; |
| 526 | |
| 527 | log_info("%016"PRIx64"llx"" mta " |
| 528 | "connecting address=%s%s:%d host=%s", |
| 529 | s->id, schema, sa_to_text(s->route->dst->sa), |
| 530 | portno, s->route->dst->ptrname); |
| 531 | |
| 532 | mta_enter_state(s, MTA_INIT); |
| 533 | s->io = io_new(); |
| 534 | io_set_callback(s->io, mta_io, s); |
| 535 | io_set_timeout(s->io, 300000); |
| 536 | if (io_connect(s->io, sa, s->route->src->sa) == -1) { |
| 537 | /* |
| 538 | * This error is most likely a "no route", |
| 539 | * so there is no need to try again. |
| 540 | */ |
| 541 | log_debug("debug: mta: io_connect failed: %s", io_error(s->io)); |
| 542 | if (errno(*__errno()) == EADDRNOTAVAIL49) |
| 543 | mta_source_error(s->relay, s->route, io_error(s->io)); |
| 544 | else |
| 545 | mta_error(s, "Connection failed: %s", io_error(s->io)); |
| 546 | mta_free(s); |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | static void |
| 551 | mta_enter_state(struct mta_session *s, int newstate) |
| 552 | { |
| 553 | struct mta_envelope *e; |
| 554 | size_t envid_sz; |
| 555 | int oldstate; |
| 556 | ssize_t q; |
| 557 | char ibuf[LINE_MAX2048]; |
| 558 | char obuf[LINE_MAX2048]; |
| 559 | int offset; |
| 560 | const char *srs_sender; |
| 561 | |
| 562 | again: |
| 563 | oldstate = s->state; |
| 564 | |
| 565 | log_trace(TRACE_MTA, "mta: %p: %s -> %s", s,do { if (tracing & (0x0020)) log_trace0("mta: %p: %s -> %s" , s, mta_strstate(oldstate), mta_strstate(newstate)); } while (0) |
| 566 | mta_strstate(oldstate),do { if (tracing & (0x0020)) log_trace0("mta: %p: %s -> %s" , s, mta_strstate(oldstate), mta_strstate(newstate)); } while (0) |
| 567 | mta_strstate(newstate))do { if (tracing & (0x0020)) log_trace0("mta: %p: %s -> %s" , s, mta_strstate(oldstate), mta_strstate(newstate)); } while (0); |
| 568 | |
| 569 | s->state = newstate; |
| 570 | |
| 571 | memset(s->replybuf, 0, sizeof s->replybuf); |
| 572 | |
| 573 | /* don't try this at home! */ |
| 574 | #define mta_enter_state(_s, _st) do { newstate = _st; goto again; } while (0) |
| 575 | |
| 576 | switch (s->state) { |
| 577 | case MTA_INIT: |
| 578 | case MTA_BANNER: |
| 579 | break; |
| 580 | |
| 581 | case MTA_EHLO: |
| 582 | s->ext = 0; |
| 583 | mta_send(s, "EHLO %s", s->helo); |
| 584 | mta_report_link_identify(s, "EHLO", s->helo); |
| 585 | break; |
| 586 | |
| 587 | case MTA_HELO: |
| 588 | s->ext = 0; |
| 589 | mta_send(s, "HELO %s", s->helo); |
| 590 | mta_report_link_identify(s, "HELO", s->helo); |
| 591 | break; |
| 592 | |
| 593 | case MTA_LHLO: |
| 594 | s->ext = 0; |
| 595 | mta_send(s, "LHLO %s", s->helo); |
| 596 | mta_report_link_identify(s, "LHLO", s->helo); |
| 597 | break; |
| 598 | |
| 599 | case MTA_STARTTLS: |
| 600 | if (s->flags & MTA_DOWNGRADE_PLAIN0x0080) |
| 601 | mta_enter_state(s, MTA_AUTH); |
| 602 | if (s->flags & MTA_TLS0x0100) /* already started */ |
| 603 | mta_enter_state(s, MTA_AUTH); |
| 604 | else if ((s->ext & MTA_EXT_STARTTLS0x01) == 0) { |
| 605 | if (s->flags & MTA_FORCE_TLS0x0004 || s->flags & MTA_WANT_SECURE0x0010) { |
| 606 | mta_error(s, "TLS required but not supported by remote host"); |
| 607 | s->flags |= MTA_RECONN0x4000; |
| 608 | } |
| 609 | else |
| 610 | /* server doesn't support starttls, do not use it */ |
| 611 | mta_enter_state(s, MTA_AUTH); |
| 612 | } |
| 613 | else |
| 614 | mta_send(s, "STARTTLS"); |
| 615 | break; |
| 616 | |
| 617 | case MTA_AUTH: |
| 618 | if (s->relay->secret && s->flags & MTA_TLS0x0100) { |
| 619 | if (s->ext & MTA_EXT_AUTH0x04) { |
| 620 | if (s->ext & MTA_EXT_AUTH_PLAIN0x08) { |
| 621 | mta_enter_state(s, MTA_AUTH_PLAIN); |
| 622 | break; |
| 623 | } |
| 624 | if (s->ext & MTA_EXT_AUTH_LOGIN0x10) { |
| 625 | mta_enter_state(s, MTA_AUTH_LOGIN); |
| 626 | break; |
| 627 | } |
| 628 | log_debug("debug: mta: %p: no supported AUTH method on session", s); |
| 629 | mta_error(s, "no supported AUTH method"); |
| 630 | } |
| 631 | else { |
| 632 | log_debug("debug: mta: %p: AUTH not advertised on session", s); |
| 633 | mta_error(s, "AUTH not advertised"); |
| 634 | } |
| 635 | } |
| 636 | else if (s->relay->secret) { |
| 637 | log_debug("debug: mta: %p: not using AUTH on non-TLS " |
| 638 | "session", s); |
| 639 | mta_error(s, "Refuse to AUTH over unsecure channel"); |
| 640 | mta_connect(s); |
| 641 | } else { |
| 642 | mta_enter_state(s, MTA_READY); |
| 643 | } |
| 644 | break; |
| 645 | |
| 646 | case MTA_AUTH_PLAIN: |
| 647 | memset(ibuf, 0, sizeof ibuf); |
| 648 | if (base64_decode(s->relay->secret, (unsigned char *)ibuf, |
| 649 | sizeof(ibuf)-1) == -1) { |
| 650 | log_debug("debug: mta: %p: credentials too large on session", s); |
| 651 | mta_error(s, "Credentials too large"); |
| 652 | break; |
| 653 | } |
| 654 | s->username = xstrdup(ibuf+1); |
| 655 | mta_send(s, "AUTH PLAIN %s", s->relay->secret); |
| 656 | break; |
| 657 | |
| 658 | case MTA_AUTH_LOGIN: |
| 659 | mta_send(s, "AUTH LOGIN"); |
| 660 | break; |
| 661 | |
| 662 | case MTA_AUTH_LOGIN_USER: |
| 663 | memset(ibuf, 0, sizeof ibuf); |
| 664 | if (base64_decode(s->relay->secret, (unsigned char *)ibuf, |
| 665 | sizeof(ibuf)-1) == -1) { |
| 666 | log_debug("debug: mta: %p: credentials too large on session", s); |
| 667 | mta_error(s, "Credentials too large"); |
| 668 | break; |
| 669 | } |
| 670 | s->username = xstrdup(ibuf+1); |
| 671 | |
| 672 | memset(obuf, 0, sizeof obuf); |
| 673 | base64_encode((unsigned char *)ibuf + 1, strlen(ibuf + 1), obuf, sizeof obuf); |
| 674 | mta_send(s, "%s", obuf); |
| 675 | |
| 676 | memset(ibuf, 0, sizeof ibuf); |
| 677 | memset(obuf, 0, sizeof obuf); |
| 678 | break; |
| 679 | |
| 680 | case MTA_AUTH_LOGIN_PASS: |
| 681 | memset(ibuf, 0, sizeof ibuf); |
| 682 | if (base64_decode(s->relay->secret, (unsigned char *)ibuf, |
| 683 | sizeof(ibuf)-1) == -1) { |
| 684 | log_debug("debug: mta: %p: credentials too large on session", s); |
| 685 | mta_error(s, "Credentials too large"); |
| 686 | break; |
| 687 | } |
| 688 | |
| 689 | offset = strlen(ibuf+1)+2; |
| 690 | memset(obuf, 0, sizeof obuf); |
| 691 | base64_encode((unsigned char *)ibuf + offset, strlen(ibuf + offset), obuf, sizeof obuf); |
| 692 | mta_send(s, "%s", obuf); |
| 693 | |
| 694 | memset(ibuf, 0, sizeof ibuf); |
| 695 | memset(obuf, 0, sizeof obuf); |
| 696 | break; |
| 697 | |
| 698 | case MTA_READY: |
| 699 | /* Ready to send a new mail */ |
| 700 | if (s->ready == 0) { |
| 701 | s->ready = 1; |
| 702 | s->relay->nconn_ready += 1; |
| 703 | mta_route_ok(s->relay, s->route); |
| 704 | } |
| 705 | |
| 706 | if (s->msgtried >= MAX_TRYBEFOREDISABLE10) { |
| 707 | log_info("%016"PRIx64"llx"" mta host-rejects-all-mails", |
| 708 | s->id); |
| 709 | mta_route_down(s->relay, s->route); |
| 710 | mta_enter_state(s, MTA_QUIT); |
| 711 | break; |
| 712 | } |
| 713 | |
| 714 | if (s->msgcount >= s->relay->limits->max_mail_per_session) { |
| 715 | log_debug("debug: mta: " |
| 716 | "%p: cannot send more message to relay %s", s, |
| 717 | mta_relay_to_text(s->relay)); |
| 718 | mta_enter_state(s, MTA_QUIT); |
| 719 | break; |
| 720 | } |
| 721 | |
| 722 | /* |
| 723 | * When downgrading from opportunistic TLS, clear flag and |
| 724 | * possibly reuse the same task (forbidden in other cases). |
| 725 | */ |
| 726 | if (s->flags & MTA_DOWNGRADE_PLAIN0x0080) |
| 727 | s->flags &= ~MTA_DOWNGRADE_PLAIN0x0080; |
| 728 | else if (s->task) |
| 729 | fatalx("task should be NULL at this point"); |
| 730 | |
| 731 | if (s->task == NULL((void *)0)) |
| 732 | s->task = mta_route_next_task(s->relay, s->route); |
| 733 | if (s->task == NULL((void *)0)) { |
| 734 | log_debug("debug: mta: %p: no task for relay %s", |
| 735 | s, mta_relay_to_text(s->relay)); |
| 736 | |
| 737 | if (s->relay->nconn > 1 || |
| 738 | s->hangon >= s->relay->limits->sessdelay_keepalive) { |
| 739 | mta_enter_state(s, MTA_QUIT); |
| 740 | break; |
| 741 | } |
| 742 | |
| 743 | log_debug("mta: debug: last connection: hanging on for %llds", |
| 744 | (long long)(s->relay->limits->sessdelay_keepalive - |
| 745 | s->hangon)); |
| 746 | s->flags |= MTA_HANGON0x2000; |
| 747 | runq_schedule(hangon, 1, s); |
| 748 | break; |
| 749 | } |
| 750 | |
| 751 | log_debug("debug: mta: %p: handling next task for relay %s", s, |
| 752 | mta_relay_to_text(s->relay)); |
| 753 | |
| 754 | stat_increment("mta.task.running", 1); |
| 755 | |
| 756 | m_create(p_queue, IMSG_MTA_OPEN_MESSAGE, 0, 0, -1); |
| 757 | m_add_id(p_queue, s->id); |
| 758 | m_add_msgid(p_queue, s->task->msgid); |
| 759 | m_close(p_queue); |
| 760 | |
| 761 | tree_xset(&wait_fd, s->id, s); |
| 762 | s->flags |= MTA_WAIT0x1000; |
| 763 | break; |
| 764 | |
| 765 | case MTA_MAIL: |
| 766 | s->currevp = TAILQ_FIRST(&s->task->envelopes)((&s->task->envelopes)->tqh_first); |
| 767 | |
| 768 | e = s->currevp; |
| 769 | s->hangon = 0; |
| 770 | s->msgtried++; |
| 771 | envid_sz = strlen(e->dsn_envid); |
| 772 | |
| 773 | /* SRS-encode if requested for the relay action, AND we're not |
| 774 | * bouncing, AND we have an RCPT which means we are forwarded, |
| 775 | * AND the RCPT has a '@' just for sanity check (will always). |
| 776 | */ |
| 777 | if (env->sc_srs_key != NULL((void *)0) && |
| 778 | s->relay->srs && |
| 779 | strchr(s->task->sender, '@') && |
| 780 | e->rcpt && |
| 781 | strchr(e->rcpt, '@')) { |
| 782 | /* encode and replace task sender with new SRS-sender */ |
| 783 | srs_sender = srs_encode(s->task->sender, |
| 784 | strchr(e->rcpt, '@') + 1); |
| 785 | if (srs_sender) { |
| 786 | free(s->task->sender); |
| 787 | s->task->sender = xstrdup(srs_sender); |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | if (s->ext & MTA_EXT_DSN0x400) { |
| 792 | mta_send(s, "MAIL FROM:<%s>%s%s%s%s", |
| 793 | s->task->sender, |
| 794 | e->dsn_ret ? " RET=" : "", |
| 795 | e->dsn_ret ? dsn_strret(e->dsn_ret) : "", |
| 796 | envid_sz ? " ENVID=" : "", |
| 797 | envid_sz ? e->dsn_envid : ""); |
| 798 | } else |
| 799 | mta_send(s, "MAIL FROM:<%s>", s->task->sender); |
| 800 | break; |
| 801 | |
| 802 | case MTA_RCPT: |
| 803 | if (s->currevp == NULL((void *)0)) |
| 804 | s->currevp = TAILQ_FIRST(&s->task->envelopes)((&s->task->envelopes)->tqh_first); |
| 805 | |
| 806 | e = s->currevp; |
| 807 | if (s->ext & MTA_EXT_DSN0x400) { |
| 808 | mta_send(s, "RCPT TO:<%s>%s%s%s%s", |
| 809 | e->dest, |
| 810 | e->dsn_notify ? " NOTIFY=" : "", |
| 811 | e->dsn_notify ? dsn_strnotify(e->dsn_notify) : "", |
| 812 | e->dsn_orcpt ? " ORCPT=" : "", |
| 813 | e->dsn_orcpt ? e->dsn_orcpt : ""); |
| 814 | } else |
| 815 | mta_send(s, "RCPT TO:<%s>", e->dest); |
| 816 | |
| 817 | mta_report_tx_envelope(s, s->task->msgid, e->id); |
| 818 | s->rcptcount++; |
| 819 | break; |
| 820 | |
| 821 | case MTA_DATA: |
| 822 | fseek(s->datafp, 0, SEEK_SET0); |
| 823 | mta_send(s, "DATA"); |
| 824 | break; |
| 825 | |
| 826 | case MTA_BODY: |
| 827 | if (s->datafp == NULL((void *)0)) { |
| 828 | log_trace(TRACE_MTA, "mta: %p: end-of-file", s)do { if (tracing & (0x0020)) log_trace0("mta: %p: end-of-file" , s); } while (0); |
| 829 | mta_enter_state(s, MTA_EOM); |
| 830 | break; |
| 831 | } |
| 832 | |
| 833 | if ((q = mta_queue_data(s)) == -1) { |
| 834 | s->flags |= MTA_FREE0x0400; |
| 835 | break; |
| 836 | } |
| 837 | if (q == 0) { |
| 838 | mta_enter_state(s, MTA_BODY); |
| 839 | break; |
| 840 | } |
| 841 | |
| 842 | log_trace(TRACE_MTA, "mta: %p: >>> [...%zd bytes...]", s, q)do { if (tracing & (0x0020)) log_trace0("mta: %p: >>> [...%zd bytes...]" , s, q); } while (0); |
| 843 | break; |
| 844 | |
| 845 | case MTA_EOM: |
| 846 | mta_send(s, "."); |
| 847 | break; |
| 848 | |
| 849 | case MTA_LMTP_EOM: |
| 850 | /* LMTP reports status of each delivery, so enable read */ |
| 851 | io_set_read(s->io); |
| 852 | break; |
| 853 | |
| 854 | case MTA_RSET: |
| 855 | if (s->datafp) { |
| 856 | fclose(s->datafp); |
| 857 | s->datafp = NULL((void *)0); |
| 858 | s->datalen = 0; |
| 859 | } |
| 860 | mta_send(s, "RSET"); |
| 861 | break; |
| 862 | |
| 863 | case MTA_QUIT: |
| 864 | mta_send(s, "QUIT"); |
| 865 | break; |
| 866 | |
| 867 | default: |
| 868 | fatalx("mta_enter_state: unknown state"); |
| 869 | } |
| 870 | #undef mta_enter_state |
| 871 | } |
| 872 | |
| 873 | /* |
| 874 | * Handle a response to an SMTP command |
| 875 | */ |
| 876 | static void |
| 877 | mta_response(struct mta_session *s, char *line) |
| 878 | { |
| 879 | struct mta_envelope *e; |
| 880 | struct sockaddr_storage ss; |
| 881 | struct sockaddr *sa; |
| 882 | const char *domain; |
| 883 | char *pbuf; |
| 884 | socklen_t sa_len; |
| 885 | char buf[LINE_MAX2048]; |
| 886 | int delivery; |
| 887 | |
| 888 | switch (s->state) { |
| 889 | |
| 890 | case MTA_BANNER: |
| 891 | if (line[0] != '2') { |
| 892 | mta_error(s, "BANNER rejected: %s", line); |
| 893 | s->flags |= MTA_FREE0x0400; |
| 894 | return; |
| 895 | } |
| 896 | |
| 897 | pbuf = ""; |
| 898 | if (strlen(line) > 4) { |
| 899 | (void)strlcpy(buf, line + 4, sizeof buf); |
| 900 | if ((pbuf = strchr(buf, ' '))) |
| 901 | *pbuf = '\0'; |
| 902 | pbuf = valid_domainpart(buf) ? buf : ""; |
| 903 | } |
| 904 | mta_report_link_greeting(s, pbuf); |
| 905 | |
| 906 | if (s->flags & MTA_LMTP0x0800) |
| 907 | mta_enter_state(s, MTA_LHLO); |
| 908 | else |
| 909 | mta_enter_state(s, MTA_EHLO); |
| 910 | break; |
| 911 | |
| 912 | case MTA_EHLO: |
| 913 | if (line[0] != '2') { |
| 914 | /* rejected at ehlo state */ |
| 915 | if ((s->relay->flags & RELAY_AUTH0x08) || |
| 916 | (s->flags & MTA_WANT_SECURE0x0010)) { |
| 917 | mta_error(s, "EHLO rejected: %s", line); |
| 918 | s->flags |= MTA_FREE0x0400; |
| 919 | return; |
| 920 | } |
| 921 | mta_enter_state(s, MTA_HELO); |
| 922 | return; |
| 923 | } |
| 924 | if (!(s->flags & MTA_FORCE_PLAIN0x0008)) |
| 925 | mta_enter_state(s, MTA_STARTTLS); |
| 926 | else |
| 927 | mta_enter_state(s, MTA_READY); |
| 928 | break; |
| 929 | |
| 930 | case MTA_HELO: |
| 931 | if (line[0] != '2') { |
| 932 | mta_error(s, "HELO rejected: %s", line); |
| 933 | s->flags |= MTA_FREE0x0400; |
| 934 | return; |
| 935 | } |
| 936 | mta_enter_state(s, MTA_READY); |
| 937 | break; |
| 938 | |
| 939 | case MTA_LHLO: |
| 940 | if (line[0] != '2') { |
| 941 | mta_error(s, "LHLO rejected: %s", line); |
| 942 | s->flags |= MTA_FREE0x0400; |
| 943 | return; |
| 944 | } |
| 945 | mta_enter_state(s, MTA_READY); |
| 946 | break; |
| 947 | |
| 948 | case MTA_STARTTLS: |
| 949 | if (line[0] != '2') { |
| 950 | if (!(s->flags & MTA_WANT_SECURE0x0010)) { |
| 951 | mta_enter_state(s, MTA_AUTH); |
| 952 | return; |
| 953 | } |
| 954 | /* XXX mark that the MX doesn't support STARTTLS */ |
| 955 | mta_error(s, "STARTTLS rejected: %s", line); |
| 956 | s->flags |= MTA_FREE0x0400; |
| 957 | return; |
| 958 | } |
| 959 | |
| 960 | mta_tls_init(s); |
| 961 | break; |
| 962 | |
| 963 | case MTA_AUTH_PLAIN: |
| 964 | if (line[0] != '2') { |
| 965 | mta_error(s, "AUTH rejected: %s", line); |
| 966 | mta_report_link_auth(s, s->username, "fail"); |
| 967 | s->flags |= MTA_FREE0x0400; |
| 968 | return; |
| 969 | } |
| 970 | mta_report_link_auth(s, s->username, "pass"); |
| 971 | mta_enter_state(s, MTA_READY); |
| 972 | break; |
| 973 | |
| 974 | case MTA_AUTH_LOGIN: |
| 975 | if (strncmp(line, "334 ", 4) != 0) { |
| 976 | mta_error(s, "AUTH rejected: %s", line); |
| 977 | mta_report_link_auth(s, s->username, "fail"); |
| 978 | s->flags |= MTA_FREE0x0400; |
| 979 | return; |
| 980 | } |
| 981 | mta_enter_state(s, MTA_AUTH_LOGIN_USER); |
| 982 | break; |
| 983 | |
| 984 | case MTA_AUTH_LOGIN_USER: |
| 985 | if (strncmp(line, "334 ", 4) != 0) { |
| 986 | mta_error(s, "AUTH rejected: %s", line); |
| 987 | mta_report_link_auth(s, s->username, "fail"); |
| 988 | s->flags |= MTA_FREE0x0400; |
| 989 | return; |
| 990 | } |
| 991 | mta_enter_state(s, MTA_AUTH_LOGIN_PASS); |
| 992 | break; |
| 993 | |
| 994 | case MTA_AUTH_LOGIN_PASS: |
| 995 | if (line[0] != '2') { |
| 996 | mta_error(s, "AUTH rejected: %s", line); |
| 997 | mta_report_link_auth(s, s->username, "fail"); |
| 998 | s->flags |= MTA_FREE0x0400; |
| 999 | return; |
| 1000 | } |
| 1001 | mta_report_link_auth(s, s->username, "pass"); |
| 1002 | mta_enter_state(s, MTA_READY); |
| 1003 | break; |
| 1004 | |
| 1005 | case MTA_MAIL: |
| 1006 | if (line[0] != '2') { |
| 1007 | if (line[0] == '5') |
| 1008 | delivery = IMSG_MTA_DELIVERY_PERMFAIL; |
| 1009 | else |
| 1010 | delivery = IMSG_MTA_DELIVERY_TEMPFAIL; |
| 1011 | |
| 1012 | mta_flush_task(s, delivery, line, 0, 0); |
| 1013 | mta_enter_state(s, MTA_RSET); |
| 1014 | return; |
| 1015 | } |
| 1016 | mta_report_tx_begin(s, s->task->msgid); |
| 1017 | mta_report_tx_mail(s, s->task->msgid, s->task->sender, 1); |
| 1018 | mta_enter_state(s, MTA_RCPT); |
| 1019 | break; |
| 1020 | |
| 1021 | case MTA_RCPT: |
| 1022 | e = s->currevp; |
| 1023 | |
| 1024 | /* remove envelope from hosttat cache if there */ |
| 1025 | if ((domain = strchr(e->dest, '@')) != NULL((void *)0)) { |
| 1026 | domain++; |
| 1027 | mta_hoststat_uncache(domain, e->id); |
| 1028 | } |
| 1029 | |
| 1030 | s->currevp = TAILQ_NEXT(s->currevp, entry)((s->currevp)->entry.tqe_next); |
| 1031 | if (line[0] == '2') { |
| 1032 | s->failures = 0; |
| 1033 | /* |
| 1034 | * this host is up, reschedule envelopes that |
| 1035 | * were cached for reschedule. |
| 1036 | */ |
| 1037 | if (domain) |
| 1038 | mta_hoststat_reschedule(domain); |
| 1039 | } |
| 1040 | else { |
| 1041 | mta_report_tx_rollback(s, s->task->msgid); |
| 1042 | mta_report_tx_reset(s, s->task->msgid); |
| 1043 | if (line[0] == '5') |
| 1044 | delivery = IMSG_MTA_DELIVERY_PERMFAIL; |
| 1045 | else |
| 1046 | delivery = IMSG_MTA_DELIVERY_TEMPFAIL; |
| 1047 | s->failures++; |
| 1048 | |
| 1049 | /* remove failed envelope from task list */ |
| 1050 | TAILQ_REMOVE(&s->task->envelopes, e, entry)do { if (((e)->entry.tqe_next) != ((void *)0)) (e)->entry .tqe_next->entry.tqe_prev = (e)->entry.tqe_prev; else ( &s->task->envelopes)->tqh_last = (e)->entry.tqe_prev ; *(e)->entry.tqe_prev = (e)->entry.tqe_next; ; ; } while (0); |
| 1051 | stat_decrement("mta.envelope", 1); |
| 1052 | |
| 1053 | /* log right away */ |
| 1054 | (void)snprintf(buf, sizeof(buf), "%s", |
| 1055 | mta_host_to_text(s->route->dst)); |
| 1056 | |
| 1057 | e->session = s->id; |
| 1058 | /* XXX */ |
| 1059 | /* |
| 1060 | * getsockname() can only fail with ENOBUFS here |
| 1061 | * best effort, don't log source ... |
| 1062 | */ |
| 1063 | sa_len = sizeof(ss); |
| 1064 | sa = (struct sockaddr *)&ss; |
| 1065 | if (getsockname(io_fileno(s->io), sa, &sa_len) == -1) |
| 1066 | mta_delivery_log(e, NULL((void *)0), buf, delivery, line); |
| 1067 | else |
| 1068 | mta_delivery_log(e, sa_to_text(sa), |
| 1069 | buf, delivery, line); |
| 1070 | |
| 1071 | if (domain) |
| 1072 | mta_hoststat_update(domain, e->status); |
| 1073 | mta_delivery_notify(e); |
| 1074 | |
| 1075 | if (s->relay->limits->max_failures_per_session && |
| 1076 | s->failures == s->relay->limits->max_failures_per_session) { |
| 1077 | mta_flush_task(s, IMSG_MTA_DELIVERY_TEMPFAIL, |
| 1078 | "Too many consecutive errors, closing connection", 0, 1); |
| 1079 | mta_enter_state(s, MTA_QUIT); |
| 1080 | break; |
| 1081 | } |
| 1082 | |
| 1083 | /* |
| 1084 | * if no more envelopes, flush failed queue |
| 1085 | */ |
| 1086 | if (TAILQ_EMPTY(&s->task->envelopes)(((&s->task->envelopes)->tqh_first) == ((void *) 0))) { |
| 1087 | mta_flush_task(s, IMSG_MTA_DELIVERY_OK, |
| 1088 | "No envelope", 0, 0); |
| 1089 | mta_enter_state(s, MTA_RSET); |
| 1090 | break; |
| 1091 | } |
| 1092 | } |
| 1093 | |
| 1094 | switch (line[0]) { |
| 1095 | case '2': |
| 1096 | mta_report_tx_rcpt(s, |
| 1097 | s->task->msgid, e->dest, 1); |
| 1098 | break; |
| 1099 | case '4': |
| 1100 | mta_report_tx_rcpt(s, |
| 1101 | s->task->msgid, e->dest, -1); |
| 1102 | break; |
| 1103 | case '5': |
| 1104 | mta_report_tx_rcpt(s, |
| 1105 | s->task->msgid, e->dest, 0); |
| 1106 | break; |
| 1107 | } |
| 1108 | |
| 1109 | if (s->currevp == NULL((void *)0)) |
| 1110 | mta_enter_state(s, MTA_DATA); |
| 1111 | else |
| 1112 | mta_enter_state(s, MTA_RCPT); |
| 1113 | break; |
| 1114 | |
| 1115 | case MTA_DATA: |
| 1116 | if (line[0] == '2' || line[0] == '3') { |
| 1117 | mta_report_tx_data(s, s->task->msgid, 1); |
| 1118 | mta_enter_state(s, MTA_BODY); |
| 1119 | break; |
| 1120 | } |
| 1121 | |
| 1122 | if (line[0] == '5') |
| 1123 | delivery = IMSG_MTA_DELIVERY_PERMFAIL; |
| 1124 | else |
| 1125 | delivery = IMSG_MTA_DELIVERY_TEMPFAIL; |
| 1126 | mta_report_tx_data(s, s->task->msgid, |
| 1127 | delivery == IMSG_MTA_DELIVERY_TEMPFAIL ? -1 : 0); |
| 1128 | mta_report_tx_rollback(s, s->task->msgid); |
| 1129 | mta_report_tx_reset(s, s->task->msgid); |
| 1130 | mta_flush_task(s, delivery, line, 0, 0); |
| 1131 | mta_enter_state(s, MTA_RSET); |
| 1132 | break; |
| 1133 | |
| 1134 | case MTA_LMTP_EOM: |
| 1135 | case MTA_EOM: |
| 1136 | if (line[0] == '2') { |
| 1137 | delivery = IMSG_MTA_DELIVERY_OK; |
| 1138 | s->msgtried = 0; |
| 1139 | s->msgcount++; |
| 1140 | } |
| 1141 | else if (line[0] == '5') |
| 1142 | delivery = IMSG_MTA_DELIVERY_PERMFAIL; |
| 1143 | else |
| 1144 | delivery = IMSG_MTA_DELIVERY_TEMPFAIL; |
| 1145 | if (delivery != IMSG_MTA_DELIVERY_OK) { |
| 1146 | mta_report_tx_rollback(s, s->task->msgid); |
| 1147 | mta_report_tx_reset(s, s->task->msgid); |
| 1148 | } |
| 1149 | else { |
| 1150 | mta_report_tx_commit(s, s->task->msgid, s->datalen); |
| 1151 | mta_report_tx_reset(s, s->task->msgid); |
| 1152 | } |
| 1153 | mta_flush_task(s, delivery, line, (s->flags & MTA_LMTP0x0800) ? 1 : 0, 0); |
| 1154 | if (s->task) { |
| 1155 | s->rcptcount--; |
| 1156 | mta_enter_state(s, MTA_LMTP_EOM); |
| 1157 | } else { |
| 1158 | s->rcptcount = 0; |
| 1159 | if (s->relay->limits->sessdelay_transaction) { |
| 1160 | log_debug("debug: mta: waiting for %llds before next transaction", |
| 1161 | (long long)s->relay->limits->sessdelay_transaction); |
| 1162 | s->hangon = s->relay->limits->sessdelay_transaction -1; |
| 1163 | s->flags |= MTA_HANGON0x2000; |
| 1164 | runq_schedule(hangon, |
| 1165 | s->relay->limits->sessdelay_transaction, s); |
| 1166 | } |
| 1167 | else |
| 1168 | mta_enter_state(s, MTA_READY); |
| 1169 | } |
| 1170 | break; |
| 1171 | |
| 1172 | case MTA_RSET: |
| 1173 | s->rcptcount = 0; |
| 1174 | |
| 1175 | if (s->task) { |
| 1176 | mta_report_tx_rollback(s, s->task->msgid); |
| 1177 | mta_report_tx_reset(s, s->task->msgid); |
| 1178 | } |
| 1179 | if (s->relay->limits->sessdelay_transaction) { |
| 1180 | log_debug("debug: mta: waiting for %llds after reset", |
| 1181 | (long long)s->relay->limits->sessdelay_transaction); |
| 1182 | s->hangon = s->relay->limits->sessdelay_transaction -1; |
| 1183 | s->flags |= MTA_HANGON0x2000; |
| 1184 | runq_schedule(hangon, |
| 1185 | s->relay->limits->sessdelay_transaction, s); |
| 1186 | } |
| 1187 | else |
| 1188 | mta_enter_state(s, MTA_READY); |
| 1189 | break; |
| 1190 | |
| 1191 | default: |
| 1192 | fatalx("mta_response() bad state"); |
| 1193 | } |
| 1194 | } |
| 1195 | |
| 1196 | static void |
| 1197 | mta_io(struct io *io, int evt, void *arg) |
| 1198 | { |
| 1199 | struct mta_session *s = arg; |
| 1200 | char *line, *msg, *p; |
| 1201 | size_t len; |
| 1202 | const char *error; |
| 1203 | int cont; |
| 1204 | |
| 1205 | log_trace(TRACE_IO, "mta: %p: %s %s", s, io_strevent(evt),do { if (tracing & (0x0004)) log_trace0("mta: %p: %s %s", s, io_strevent(evt), io_strio(io)); } while (0) |
| 1206 | io_strio(io))do { if (tracing & (0x0004)) log_trace0("mta: %p: %s %s", s, io_strevent(evt), io_strio(io)); } while (0); |
| 1207 | |
| 1208 | switch (evt) { |
| 1209 | |
| 1210 | case IO_CONNECTED: |
| 1211 | mta_connected(s); |
| 1212 | |
| 1213 | if (s->use_smtps) { |
| 1214 | io_set_write(io); |
| 1215 | mta_tls_init(s); |
| 1216 | if (s->flags & MTA_FREE0x0400) |
| 1217 | mta_free(s); |
| 1218 | } |
| 1219 | else { |
| 1220 | mta_enter_state(s, MTA_BANNER); |
| 1221 | io_set_read(io); |
| 1222 | } |
| 1223 | break; |
| 1224 | |
| 1225 | case IO_TLSREADY: |
| 1226 | log_info("%016"PRIx64"llx"" mta tls ciphers=%s", |
| 1227 | s->id, tls_to_text(io_tls(s->io))); |
| 1228 | s->flags |= MTA_TLS0x0100; |
| 1229 | if (s->relay->dispatcher->u.remote.tls_verify) |
| 1230 | s->flags |= MTA_TLS_VERIFIED0x0200; |
| 1231 | |
| 1232 | mta_tls_started(s); |
| 1233 | mta_report_link_tls(s, |
| 1234 | tls_to_text(io_tls(s->io))); |
| 1235 | break; |
| 1236 | |
| 1237 | case IO_DATAIN: |
| 1238 | nextline: |
| 1239 | line = io_getline(s->io, &len); |
| 1240 | if (line == NULL((void *)0)) { |
| 1241 | if (io_datalen(s->io) >= LINE_MAX2048) { |
| 1242 | mta_error(s, "Input too long"); |
| 1243 | mta_free(s); |
| 1244 | } |
| 1245 | return; |
| 1246 | } |
| 1247 | |
| 1248 | /* Strip trailing '\r' */ |
| 1249 | if (len && line[len - 1] == '\r') |
| 1250 | line[--len] = '\0'; |
| 1251 | |
| 1252 | log_trace(TRACE_MTA, "mta: %p: <<< %s", s, line)do { if (tracing & (0x0020)) log_trace0("mta: %p: <<< %s" , s, line); } while (0); |
| 1253 | mta_report_protocol_server(s, line); |
| 1254 | |
| 1255 | if ((error = parse_smtp_response(line, len, &msg, &cont))) { |
| 1256 | mta_error(s, "Bad response: %s", error); |
| 1257 | mta_free(s); |
| 1258 | return; |
| 1259 | } |
| 1260 | |
| 1261 | /* read extensions */ |
| 1262 | if (s->state == MTA_EHLO) { |
| 1263 | if (strcmp(msg, "STARTTLS") == 0) |
| 1264 | s->ext |= MTA_EXT_STARTTLS0x01; |
| 1265 | else if (strncmp(msg, "AUTH ", 5) == 0) { |
| 1266 | s->ext |= MTA_EXT_AUTH0x04; |
| 1267 | if ((p = strstr(msg, " PLAIN")) && |
| 1268 | (*(p+6) == '\0' || *(p+6) == ' ')) |
| 1269 | s->ext |= MTA_EXT_AUTH_PLAIN0x08; |
| 1270 | if ((p = strstr(msg, " LOGIN")) && |
| 1271 | (*(p+6) == '\0' || *(p+6) == ' ')) |
| 1272 | s->ext |= MTA_EXT_AUTH_LOGIN0x10; |
| 1273 | } |
| 1274 | else if (strcmp(msg, "PIPELINING") == 0) |
| 1275 | s->ext |= MTA_EXT_PIPELINING0x02; |
| 1276 | else if (strcmp(msg, "DSN") == 0) |
| 1277 | s->ext |= MTA_EXT_DSN0x400; |
| 1278 | else if (strncmp(msg, "SIZE ", 5) == 0) { |
| 1279 | s->ext_size = strtonum(msg+5, 0, UINT32_MAX0xffffffffU, &error); |
| 1280 | if (error == NULL((void *)0)) |
| 1281 | s->ext |= MTA_EXT_SIZE0x20; |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | /* continuation reply, we parse out the repeating statuses and ESC */ |
| 1286 | if (cont) { |
| 1287 | if (s->replybuf[0] == '\0') |
| 1288 | (void)strlcat(s->replybuf, line, sizeof s->replybuf); |
| 1289 | else if (len > 4) { |
| 1290 | p = line + 4; |
| 1291 | if (isdigit((unsigned char)p[0]) && p[1] == '.' && |
| 1292 | isdigit((unsigned char)p[2]) && p[3] == '.' && |
| 1293 | isdigit((unsigned char)p[4]) && isspace((unsigned char)p[5])) |
| 1294 | p += 5; |
| 1295 | (void)strlcat(s->replybuf, p, sizeof s->replybuf); |
| 1296 | } |
| 1297 | goto nextline; |
| 1298 | } |
| 1299 | |
| 1300 | /* last line of a reply, check if we're on a continuation to parse out status and ESC. |
| 1301 | * if we overflow reply buffer or are not on continuation, log entire last line. |
| 1302 | */ |
| 1303 | if (s->replybuf[0] == '\0') |
| 1304 | (void)strlcat(s->replybuf, line, sizeof s->replybuf); |
| 1305 | else if (len > 4) { |
| 1306 | p = line + 4; |
| 1307 | if (isdigit((unsigned char)p[0]) && p[1] == '.' && |
| 1308 | isdigit((unsigned char)p[2]) && p[3] == '.' && |
| 1309 | isdigit((unsigned char)p[4]) && isspace((unsigned char)p[5])) |
| 1310 | p += 5; |
| 1311 | if (strlcat(s->replybuf, p, sizeof s->replybuf) >= sizeof s->replybuf) |
| 1312 | (void)strlcpy(s->replybuf, line, sizeof s->replybuf); |
| 1313 | } |
| 1314 | |
| 1315 | if (s->state == MTA_QUIT) { |
| 1316 | log_info("%016"PRIx64"llx"" mta disconnected reason=quit messages=%zu", |
| 1317 | s->id, s->msgcount); |
| 1318 | mta_free(s); |
| 1319 | return; |
| 1320 | } |
| 1321 | io_set_write(io); |
| 1322 | mta_response(s, s->replybuf); |
| 1323 | if (s->flags & MTA_FREE0x0400) { |
| 1324 | mta_free(s); |
| 1325 | return; |
| 1326 | } |
| 1327 | if (s->flags & MTA_RECONN0x4000) { |
| 1328 | s->flags &= ~MTA_RECONN0x4000; |
| 1329 | mta_connect(s); |
| 1330 | return; |
| 1331 | } |
| 1332 | |
| 1333 | if (io_datalen(s->io)) { |
| 1334 | log_debug("debug: mta: remaining data in input buffer"); |
| 1335 | mta_error(s, "Remote host sent too much data"); |
| 1336 | if (s->flags & MTA_WAIT0x1000) |
| 1337 | s->flags |= MTA_FREE0x0400; |
| 1338 | else |
| 1339 | mta_free(s); |
| 1340 | } |
| 1341 | break; |
| 1342 | |
| 1343 | case IO_LOWAT: |
| 1344 | if (s->state == MTA_BODY) { |
| 1345 | mta_enter_state(s, MTA_BODY); |
| 1346 | if (s->flags & MTA_FREE0x0400) { |
| 1347 | mta_free(s); |
| 1348 | return; |
| 1349 | } |
| 1350 | } |
| 1351 | |
| 1352 | if (io_queued(s->io) == 0) |
| 1353 | io_set_read(io); |
| 1354 | break; |
| 1355 | |
| 1356 | case IO_TIMEOUT: |
| 1357 | log_debug("debug: mta: %p: connection timeout", s); |
| 1358 | mta_error(s, "Connection timeout"); |
| 1359 | mta_report_timeout(s); |
| 1360 | if (!s->ready) |
| 1361 | mta_connect(s); |
| 1362 | else |
| 1363 | mta_free(s); |
| 1364 | break; |
| 1365 | |
| 1366 | case IO_ERROR: |
| 1367 | log_debug("debug: mta: %p: IO error: %s", s, io_error(io)); |
| 1368 | |
| 1369 | if (s->state == MTA_STARTTLS && s->use_smtp_tls) { |
| 1370 | /* error in non-strict SSL negotiation, downgrade to plain */ |
| 1371 | log_info("smtp-out: Error on session %016"PRIx64"llx" |
| 1372 | ": opportunistic TLS failed, " |
| 1373 | "downgrading to plain", s->id); |
| 1374 | s->flags &= ~MTA_TLS0x0100; |
| 1375 | s->flags |= MTA_DOWNGRADE_PLAIN0x0080; |
| 1376 | mta_connect(s); |
| 1377 | break; |
| 1378 | } |
| 1379 | |
| 1380 | mta_error(s, "IO Error: %s", io_error(io)); |
| 1381 | mta_free(s); |
| 1382 | break; |
| 1383 | |
| 1384 | case IO_DISCONNECTED: |
| 1385 | log_debug("debug: mta: %p: disconnected in state %s", |
| 1386 | s, mta_strstate(s->state)); |
| 1387 | mta_error(s, "Connection closed unexpectedly"); |
| 1388 | if (!s->ready) |
| 1389 | mta_connect(s); |
| 1390 | else |
| 1391 | mta_free(s); |
| 1392 | break; |
| 1393 | |
| 1394 | default: |
| 1395 | fatalx("mta_io() bad event"); |
| 1396 | } |
| 1397 | } |
| 1398 | |
| 1399 | static void |
| 1400 | mta_send(struct mta_session *s, char *fmt, ...) |
| 1401 | { |
| 1402 | va_list ap; |
| 1403 | char *p; |
| 1404 | int len; |
| 1405 | |
| 1406 | va_start(ap, fmt)__builtin_va_start((ap), fmt); |
| 1407 | if ((len = vasprintf(&p, fmt, ap)) == -1) |
| 1408 | fatal("mta: vasprintf"); |
| 1409 | va_end(ap)__builtin_va_end((ap)); |
| 1410 | |
| 1411 | log_trace(TRACE_MTA, "mta: %p: >>> %s", s, p)do { if (tracing & (0x0020)) log_trace0("mta: %p: >>> %s" , s, p); } while (0); |
| 1412 | |
| 1413 | if (strncasecmp(p, "AUTH PLAIN ", 11) == 0) |
| 1414 | mta_report_protocol_client(s, "AUTH PLAIN ********"); |
| 1415 | else if (s->state == MTA_AUTH_LOGIN_USER || s->state == MTA_AUTH_LOGIN_PASS) |
| 1416 | mta_report_protocol_client(s, "********"); |
| 1417 | else |
| 1418 | mta_report_protocol_client(s, p); |
| 1419 | |
| 1420 | io_xprintf(s->io, "%s\r\n", p); |
| 1421 | |
| 1422 | free(p); |
| 1423 | } |
| 1424 | |
| 1425 | /* |
| 1426 | * Queue some data into the input buffer |
| 1427 | */ |
| 1428 | static ssize_t |
| 1429 | mta_queue_data(struct mta_session *s) |
| 1430 | { |
| 1431 | char *ln = NULL((void *)0); |
| 1432 | size_t sz = 0, q; |
| 1433 | ssize_t len; |
| 1434 | |
| 1435 | q = io_queued(s->io); |
| 1436 | |
| 1437 | while (io_queued(s->io) < MTA_HIWAT65535) { |
| 1438 | if ((len = getline(&ln, &sz, s->datafp)) == -1) |
| 1439 | break; |
| 1440 | if (ln[len - 1] == '\n') |
| 1441 | ln[len - 1] = '\0'; |
| 1442 | s->datalen += io_xprintf(s->io, "%s%s\r\n", *ln == '.' ? "." : "", ln); |
| 1443 | } |
| 1444 | |
| 1445 | free(ln); |
| 1446 | if (ferror(s->datafp)(!__isthreaded ? (((s->datafp)->_flags & 0x0040) != 0) : (ferror)(s->datafp))) { |
| 1447 | mta_flush_task(s, IMSG_MTA_DELIVERY_TEMPFAIL, |
| 1448 | "Error reading content file", 0, 0); |
| 1449 | return (-1); |
| 1450 | } |
| 1451 | |
| 1452 | if (feof(s->datafp)(!__isthreaded ? (((s->datafp)->_flags & 0x0020) != 0) : (feof)(s->datafp))) { |
| 1453 | fclose(s->datafp); |
| 1454 | s->datafp = NULL((void *)0); |
| 1455 | } |
| 1456 | |
| 1457 | return (io_queued(s->io) - q); |
| 1458 | } |
| 1459 | |
| 1460 | static void |
| 1461 | mta_flush_task(struct mta_session *s, int delivery, const char *error, size_t count, |
| 1462 | int cache) |
| 1463 | { |
| 1464 | struct mta_envelope *e; |
| 1465 | char relay[LINE_MAX2048]; |
| 1466 | size_t n; |
| 1467 | struct sockaddr_storage ss; |
| 1468 | struct sockaddr *sa; |
| 1469 | socklen_t sa_len; |
| 1470 | const char *domain; |
| 1471 | |
| 1472 | (void)snprintf(relay, sizeof relay, "%s", mta_host_to_text(s->route->dst)); |
| 1473 | n = 0; |
| 1474 | while ((e = TAILQ_FIRST(&s->task->envelopes)((&s->task->envelopes)->tqh_first))) { |
| 1475 | |
| 1476 | if (count && n == count) { |
| 1477 | stat_decrement("mta.envelope", n); |
| 1478 | return; |
| 1479 | } |
| 1480 | |
| 1481 | TAILQ_REMOVE(&s->task->envelopes, e, entry)do { if (((e)->entry.tqe_next) != ((void *)0)) (e)->entry .tqe_next->entry.tqe_prev = (e)->entry.tqe_prev; else ( &s->task->envelopes)->tqh_last = (e)->entry.tqe_prev ; *(e)->entry.tqe_prev = (e)->entry.tqe_next; ; ; } while (0); |
| 1482 | |
| 1483 | /* we're about to log, associate session to envelope */ |
| 1484 | e->session = s->id; |
| 1485 | e->ext = s->ext; |
| 1486 | |
| 1487 | /* XXX */ |
| 1488 | /* |
| 1489 | * getsockname() can only fail with ENOBUFS here |
| 1490 | * best effort, don't log source ... |
| 1491 | */ |
| 1492 | sa = (struct sockaddr *)&ss; |
| 1493 | sa_len = sizeof(ss); |
| 1494 | if (getsockname(io_fileno(s->io), sa, &sa_len) == -1) |
| 1495 | mta_delivery_log(e, NULL((void *)0), relay, delivery, error); |
| 1496 | else |
| 1497 | mta_delivery_log(e, sa_to_text(sa), |
| 1498 | relay, delivery, error); |
| 1499 | |
| 1500 | mta_delivery_notify(e); |
| 1501 | |
| 1502 | domain = strchr(e->dest, '@'); |
| 1503 | if (domain) { |
| 1504 | domain++; |
| 1505 | mta_hoststat_update(domain, error); |
| 1506 | if (cache) |
| 1507 | mta_hoststat_cache(domain, e->id); |
| 1508 | } |
| 1509 | |
| 1510 | n++; |
| 1511 | } |
| 1512 | |
| 1513 | free(s->task->sender); |
| 1514 | free(s->task); |
| 1515 | s->task = NULL((void *)0); |
| 1516 | |
| 1517 | if (s->datafp) { |
| 1518 | fclose(s->datafp); |
| 1519 | s->datafp = NULL((void *)0); |
| 1520 | } |
| 1521 | |
| 1522 | stat_decrement("mta.envelope", n); |
| 1523 | stat_decrement("mta.task.running", 1); |
| 1524 | stat_decrement("mta.task", 1); |
| 1525 | } |
| 1526 | |
| 1527 | static void |
| 1528 | mta_error(struct mta_session *s, const char *fmt, ...) |
| 1529 | { |
| 1530 | va_list ap; |
| 1531 | char *error; |
| 1532 | int len; |
| 1533 | |
| 1534 | va_start(ap, fmt)__builtin_va_start((ap), fmt); |
| 1535 | if ((len = vasprintf(&error, fmt, ap)) == -1) |
Although the value stored to 'len' is used in the enclosing expression, the value is never actually read from 'len' | |
| 1536 | fatal("mta: vasprintf"); |
| 1537 | va_end(ap)__builtin_va_end((ap)); |
| 1538 | |
| 1539 | if (s->msgcount) |
| 1540 | log_info("smtp-out: Error on session %016"PRIx64"llx" |
| 1541 | " after %zu message%s sent: %s", s->id, s->msgcount, |
| 1542 | (s->msgcount > 1) ? "s" : "", error); |
| 1543 | else |
| 1544 | log_info("%016"PRIx64"llx"" mta error reason=%s", |
| 1545 | s->id, error); |
| 1546 | |
| 1547 | /* |
| 1548 | * If not connected yet, and the error is not local, just ignore it |
| 1549 | * and try to reconnect. |
| 1550 | */ |
| 1551 | if (s->state == MTA_INIT && |
| 1552 | (errno(*__errno()) == ETIMEDOUT60 || errno(*__errno()) == ECONNREFUSED61)) { |
| 1553 | log_debug("debug: mta: not reporting route error yet"); |
| 1554 | free(error); |
| 1555 | return; |
| 1556 | } |
| 1557 | |
| 1558 | mta_route_error(s->relay, s->route); |
| 1559 | |
| 1560 | if (s->task) |
| 1561 | mta_flush_task(s, IMSG_MTA_DELIVERY_TEMPFAIL, error, 0, 0); |
| 1562 | |
| 1563 | free(error); |
| 1564 | } |
| 1565 | |
| 1566 | static void |
| 1567 | mta_tls_init(struct mta_session *s) |
| 1568 | { |
| 1569 | struct dispatcher_remote *remote; |
| 1570 | struct tls *tls; |
| 1571 | |
| 1572 | if ((tls = tls_client()) == NULL((void *)0)) { |
| 1573 | log_info("%016"PRIx64"llx"" mta closing reason=tls-failure", s->id); |
| 1574 | s->flags |= MTA_FREE0x0400; |
| 1575 | return; |
| 1576 | } |
| 1577 | |
| 1578 | remote = &s->relay->dispatcher->u.remote; |
| 1579 | if ((s->flags & MTA_WANT_SECURE0x0010) && !remote->tls_required) { |
| 1580 | /* If TLS not explicitly configured, use implicit config. */ |
| 1581 | remote->tls_required = 1; |
| 1582 | remote->tls_verify = 1; |
| 1583 | tls_config_verify(remote->tls_config); |
| 1584 | } |
| 1585 | if (tls_configure(tls, remote->tls_config) == -1) { |
| 1586 | log_info("%016"PRIx64"llx"" mta closing reason=tls-failure", s->id); |
| 1587 | tls_free(tls); |
| 1588 | s->flags |= MTA_FREE0x0400; |
| 1589 | return; |
| 1590 | } |
| 1591 | |
| 1592 | if (io_connect_tls(s->io, tls, s->mxname) == -1) { |
| 1593 | log_info("%016"PRIx64"llx"" mta closing reason=tls-connect-failed", s->id); |
| 1594 | tls_free(tls); |
| 1595 | s->flags |= MTA_FREE0x0400; |
| 1596 | } |
| 1597 | } |
| 1598 | |
| 1599 | static void |
| 1600 | mta_tls_started(struct mta_session *s) |
| 1601 | { |
| 1602 | if (tls_peer_cert_provided(io_tls(s->io))) { |
| 1603 | log_info("%016"PRIx64"llx"" mta " |
| 1604 | "cert-check result=\"%s\" fingerprint=\"%s\"", |
| 1605 | s->id, |
| 1606 | (s->flags & MTA_TLS_VERIFIED0x0200) ? "valid" : "unverified", |
| 1607 | tls_peer_cert_hash(io_tls(s->io))); |
| 1608 | } |
| 1609 | else { |
| 1610 | log_info("%016"PRIx64"llx"" smtp " |
| 1611 | "cert-check result=\"no certificate presented\"", |
| 1612 | s->id); |
| 1613 | } |
| 1614 | |
| 1615 | if (s->use_smtps) { |
| 1616 | mta_enter_state(s, MTA_BANNER); |
| 1617 | io_set_read(s->io); |
| 1618 | } |
| 1619 | else |
| 1620 | mta_enter_state(s, MTA_EHLO); |
| 1621 | } |
| 1622 | |
| 1623 | static const char * |
| 1624 | dsn_strret(enum dsn_ret ret) |
| 1625 | { |
| 1626 | if (ret == DSN_RETHDRS) |
| 1627 | return "HDRS"; |
| 1628 | else if (ret == DSN_RETFULL) |
| 1629 | return "FULL"; |
| 1630 | else { |
| 1631 | log_debug("mta: invalid ret %d", ret); |
| 1632 | return "???"; |
| 1633 | } |
| 1634 | } |
| 1635 | |
| 1636 | static const char * |
| 1637 | dsn_strnotify(uint8_t arg) |
| 1638 | { |
| 1639 | static char buf[32]; |
| 1640 | size_t sz; |
| 1641 | |
| 1642 | buf[0] = '\0'; |
| 1643 | if (arg & DSN_SUCCESS0x01) |
| 1644 | (void)strlcat(buf, "SUCCESS,", sizeof(buf)); |
| 1645 | |
| 1646 | if (arg & DSN_FAILURE0x02) |
| 1647 | (void)strlcat(buf, "FAILURE,", sizeof(buf)); |
| 1648 | |
| 1649 | if (arg & DSN_DELAY0x04) |
| 1650 | (void)strlcat(buf, "DELAY,", sizeof(buf)); |
| 1651 | |
| 1652 | if (arg & DSN_NEVER0x08) |
| 1653 | (void)strlcat(buf, "NEVER,", sizeof(buf)); |
| 1654 | |
| 1655 | /* trim trailing comma */ |
| 1656 | sz = strlen(buf); |
| 1657 | if (sz) |
| 1658 | buf[sz - 1] = '\0'; |
| 1659 | |
| 1660 | return (buf); |
| 1661 | } |
| 1662 | |
| 1663 | #define CASE(x)case x : return "x" case x : return #x |
| 1664 | |
| 1665 | static const char * |
| 1666 | mta_strstate(int state) |
| 1667 | { |
| 1668 | switch (state) { |
| 1669 | CASE(MTA_INIT)case MTA_INIT : return "MTA_INIT"; |
| 1670 | CASE(MTA_BANNER)case MTA_BANNER : return "MTA_BANNER"; |
| 1671 | CASE(MTA_EHLO)case MTA_EHLO : return "MTA_EHLO"; |
| 1672 | CASE(MTA_HELO)case MTA_HELO : return "MTA_HELO"; |
| 1673 | CASE(MTA_STARTTLS)case MTA_STARTTLS : return "MTA_STARTTLS"; |
| 1674 | CASE(MTA_AUTH)case MTA_AUTH : return "MTA_AUTH"; |
| 1675 | CASE(MTA_AUTH_PLAIN)case MTA_AUTH_PLAIN : return "MTA_AUTH_PLAIN"; |
| 1676 | CASE(MTA_AUTH_LOGIN)case MTA_AUTH_LOGIN : return "MTA_AUTH_LOGIN"; |
| 1677 | CASE(MTA_AUTH_LOGIN_USER)case MTA_AUTH_LOGIN_USER : return "MTA_AUTH_LOGIN_USER"; |
| 1678 | CASE(MTA_AUTH_LOGIN_PASS)case MTA_AUTH_LOGIN_PASS : return "MTA_AUTH_LOGIN_PASS"; |
| 1679 | CASE(MTA_READY)case MTA_READY : return "MTA_READY"; |
| 1680 | CASE(MTA_MAIL)case MTA_MAIL : return "MTA_MAIL"; |
| 1681 | CASE(MTA_RCPT)case MTA_RCPT : return "MTA_RCPT"; |
| 1682 | CASE(MTA_DATA)case MTA_DATA : return "MTA_DATA"; |
| 1683 | CASE(MTA_BODY)case MTA_BODY : return "MTA_BODY"; |
| 1684 | CASE(MTA_EOM)case MTA_EOM : return "MTA_EOM"; |
| 1685 | CASE(MTA_LMTP_EOM)case MTA_LMTP_EOM : return "MTA_LMTP_EOM"; |
| 1686 | CASE(MTA_RSET)case MTA_RSET : return "MTA_RSET"; |
| 1687 | CASE(MTA_QUIT)case MTA_QUIT : return "MTA_QUIT"; |
| 1688 | default: |
| 1689 | return "MTA_???"; |
| 1690 | } |
| 1691 | } |
| 1692 | |
| 1693 | static void |
| 1694 | mta_filter_begin(struct mta_session *s) |
| 1695 | { |
| 1696 | if (!SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1697 | return; |
| 1698 | |
| 1699 | m_create(p_lka, IMSG_FILTER_SMTP_BEGIN, 0, 0, -1); |
| 1700 | m_add_id(p_lka, s->id); |
| 1701 | m_add_string(p_lka, s->relay->dispatcher->u.remote.filtername); |
| 1702 | m_close(p_lka); |
| 1703 | } |
| 1704 | |
| 1705 | static void |
| 1706 | mta_filter_end(struct mta_session *s) |
| 1707 | { |
| 1708 | if (!SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1709 | return; |
| 1710 | |
| 1711 | m_create(p_lka, IMSG_FILTER_SMTP_END, 0, 0, -1); |
| 1712 | m_add_id(p_lka, s->id); |
| 1713 | m_close(p_lka); |
| 1714 | } |
| 1715 | |
| 1716 | static void |
| 1717 | mta_connected(struct mta_session *s) |
| 1718 | { |
| 1719 | struct sockaddr_storage sa_src; |
| 1720 | struct sockaddr_storage sa_dest; |
| 1721 | int sa_len; |
| 1722 | |
| 1723 | log_info("%016"PRIx64"llx"" mta connected", s->id); |
| 1724 | |
| 1725 | sa_len = sizeof sa_src; |
| 1726 | if (getsockname(io_fileno(s->io), |
| 1727 | (struct sockaddr *)&sa_src, &sa_len) == -1) |
| 1728 | bzero(&sa_src, sizeof sa_src); |
| 1729 | sa_len = sizeof sa_dest; |
| 1730 | if (getpeername(io_fileno(s->io), |
| 1731 | (struct sockaddr *)&sa_dest, &sa_len) == -1) |
| 1732 | bzero(&sa_dest, sizeof sa_dest); |
| 1733 | |
| 1734 | mta_report_link_connect(s, |
| 1735 | s->route->dst->ptrname, 1, |
| 1736 | &sa_src, |
| 1737 | &sa_dest); |
| 1738 | } |
| 1739 | |
| 1740 | static void |
| 1741 | mta_disconnected(struct mta_session *s) |
| 1742 | { |
| 1743 | mta_report_link_disconnect(s); |
| 1744 | mta_filter_end(s); |
| 1745 | } |
| 1746 | |
| 1747 | |
| 1748 | static void |
| 1749 | mta_report_link_connect(struct mta_session *s, const char *rdns, int fcrdns, |
| 1750 | const struct sockaddr_storage *ss_src, |
| 1751 | const struct sockaddr_storage *ss_dest) |
| 1752 | { |
| 1753 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1754 | return; |
| 1755 | |
| 1756 | report_smtp_link_connect("smtp-out", s->id, rdns, fcrdns, ss_src, ss_dest); |
| 1757 | } |
| 1758 | |
| 1759 | static void |
| 1760 | mta_report_link_greeting(struct mta_session *s, |
| 1761 | const char *domain) |
| 1762 | { |
| 1763 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1764 | return; |
| 1765 | |
| 1766 | report_smtp_link_greeting("smtp-out", s->id, domain); |
| 1767 | } |
| 1768 | |
| 1769 | static void |
| 1770 | mta_report_link_identify(struct mta_session *s, const char *method, const char *identity) |
| 1771 | { |
| 1772 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1773 | return; |
| 1774 | |
| 1775 | report_smtp_link_identify("smtp-out", s->id, method, identity); |
| 1776 | } |
| 1777 | |
| 1778 | static void |
| 1779 | mta_report_link_tls(struct mta_session *s, const char *ssl) |
| 1780 | { |
| 1781 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1782 | return; |
| 1783 | |
| 1784 | report_smtp_link_tls("smtp-out", s->id, ssl); |
| 1785 | } |
| 1786 | |
| 1787 | static void |
| 1788 | mta_report_link_disconnect(struct mta_session *s) |
| 1789 | { |
| 1790 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1791 | return; |
| 1792 | |
| 1793 | report_smtp_link_disconnect("smtp-out", s->id); |
| 1794 | } |
| 1795 | |
| 1796 | static void |
| 1797 | mta_report_link_auth(struct mta_session *s, const char *user, const char *result) |
| 1798 | { |
| 1799 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1800 | return; |
| 1801 | |
| 1802 | report_smtp_link_auth("smtp-out", s->id, user, result); |
| 1803 | } |
| 1804 | |
| 1805 | static void |
| 1806 | mta_report_tx_reset(struct mta_session *s, uint32_t msgid) |
| 1807 | { |
| 1808 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1809 | return; |
| 1810 | |
| 1811 | report_smtp_tx_reset("smtp-out", s->id, msgid); |
| 1812 | } |
| 1813 | |
| 1814 | static void |
| 1815 | mta_report_tx_begin(struct mta_session *s, uint32_t msgid) |
| 1816 | { |
| 1817 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1818 | return; |
| 1819 | |
| 1820 | report_smtp_tx_begin("smtp-out", s->id, msgid); |
| 1821 | } |
| 1822 | |
| 1823 | static void |
| 1824 | mta_report_tx_mail(struct mta_session *s, uint32_t msgid, const char *address, int ok) |
| 1825 | { |
| 1826 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1827 | return; |
| 1828 | |
| 1829 | report_smtp_tx_mail("smtp-out", s->id, msgid, address, ok); |
| 1830 | } |
| 1831 | |
| 1832 | static void |
| 1833 | mta_report_tx_rcpt(struct mta_session *s, uint32_t msgid, const char *address, int ok) |
| 1834 | { |
| 1835 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1836 | return; |
| 1837 | |
| 1838 | report_smtp_tx_rcpt("smtp-out", s->id, msgid, address, ok); |
| 1839 | } |
| 1840 | |
| 1841 | static void |
| 1842 | mta_report_tx_envelope(struct mta_session *s, uint32_t msgid, uint64_t evpid) |
| 1843 | { |
| 1844 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1845 | return; |
| 1846 | |
| 1847 | report_smtp_tx_envelope("smtp-out", s->id, msgid, evpid); |
| 1848 | } |
| 1849 | |
| 1850 | static void |
| 1851 | mta_report_tx_data(struct mta_session *s, uint32_t msgid, int ok) |
| 1852 | { |
| 1853 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1854 | return; |
| 1855 | |
| 1856 | report_smtp_tx_data("smtp-out", s->id, msgid, ok); |
| 1857 | } |
| 1858 | |
| 1859 | static void |
| 1860 | mta_report_tx_commit(struct mta_session *s, uint32_t msgid, size_t msgsz) |
| 1861 | { |
| 1862 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1863 | return; |
| 1864 | |
| 1865 | report_smtp_tx_commit("smtp-out", s->id, msgid, msgsz); |
| 1866 | } |
| 1867 | |
| 1868 | static void |
| 1869 | mta_report_tx_rollback(struct mta_session *s, uint32_t msgid) |
| 1870 | { |
| 1871 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1872 | return; |
| 1873 | |
| 1874 | report_smtp_tx_rollback("smtp-out", s->id, msgid); |
| 1875 | } |
| 1876 | |
| 1877 | static void |
| 1878 | mta_report_protocol_client(struct mta_session *s, const char *command) |
| 1879 | { |
| 1880 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1881 | return; |
| 1882 | |
| 1883 | report_smtp_protocol_client("smtp-out", s->id, command); |
| 1884 | } |
| 1885 | |
| 1886 | static void |
| 1887 | mta_report_protocol_server(struct mta_session *s, const char *response) |
| 1888 | { |
| 1889 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1890 | return; |
| 1891 | |
| 1892 | report_smtp_protocol_server("smtp-out", s->id, response); |
| 1893 | } |
| 1894 | |
| 1895 | #if 0 |
| 1896 | static void |
| 1897 | mta_report_filter_response(struct mta_session *s, int phase, int response, const char *param) |
| 1898 | { |
| 1899 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1900 | return; |
| 1901 | |
| 1902 | report_smtp_filter_response("smtp-out", s->id, phase, response, param); |
| 1903 | } |
| 1904 | #endif |
| 1905 | |
| 1906 | static void |
| 1907 | mta_report_timeout(struct mta_session *s) |
| 1908 | { |
| 1909 | if (! SESSION_FILTERED(s)((s)->relay->dispatcher->u.remote.filtername)) |
| 1910 | return; |
| 1911 | |
| 1912 | report_smtp_timeout("smtp-out", s->id); |
| 1913 | } |