| File: | src/usr.sbin/identd/identd.c |
| Warning: | line 279, column 2 Value stored to 'argv' is never read |
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| 1 | /* $OpenBSD: identd.c,v 1.40 2019/07/03 03:24:03 deraadt Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2013 David Gwynne <dlg@openbsd.org> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/ioctl.h> |
| 21 | #include <sys/socket.h> |
| 22 | #include <sys/queue.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/sysctl.h> |
| 25 | #include <sys/uio.h> |
| 26 | |
| 27 | #include <netinet/in.h> |
| 28 | #include <netinet/tcp.h> |
| 29 | #include <netinet/tcp_timer.h> |
| 30 | #include <netinet/tcp_var.h> |
| 31 | |
| 32 | #include <netdb.h> |
| 33 | |
| 34 | #include <err.h> |
| 35 | #include <ctype.h> |
| 36 | #include <errno(*__errno()).h> |
| 37 | #include <event.h> |
| 38 | #include <fcntl.h> |
| 39 | #include <pwd.h> |
| 40 | #include <stdio.h> |
| 41 | #include <limits.h> |
| 42 | #include <stdlib.h> |
| 43 | #include <stdarg.h> |
| 44 | #include <string.h> |
| 45 | #include <signal.h> |
| 46 | #include <syslog.h> |
| 47 | #include <unistd.h> |
| 48 | |
| 49 | #define IDENTD_USER"_identd" "_identd" |
| 50 | |
| 51 | #define DOTNOIDENT".noident" ".noident" |
| 52 | |
| 53 | #define TIMEOUT_MIN4 4 |
| 54 | #define TIMEOUT_MAX240 240 |
| 55 | #define TIMEOUT_DEFAULT120 120 |
| 56 | #define INPUT_MAX256 256 |
| 57 | |
| 58 | enum ident_client_state { |
| 59 | S_BEGINNING = 0, |
| 60 | S_SERVER_PORT, |
| 61 | S_PRE_COMMA, |
| 62 | S_POST_COMMA, |
| 63 | S_CLIENT_PORT, |
| 64 | S_PRE_EOL, |
| 65 | S_EOL, |
| 66 | |
| 67 | S_DEAD, |
| 68 | S_QUEUED |
| 69 | }; |
| 70 | |
| 71 | #define E_NONE0 0 |
| 72 | #define E_NOUSER1 1 |
| 73 | #define E_UNKNOWN2 2 |
| 74 | #define E_HIDDEN3 3 |
| 75 | |
| 76 | struct ident_client { |
| 77 | struct { |
| 78 | /* from the socket */ |
| 79 | struct sockaddr_storage ss; |
| 80 | socklen_t len; |
| 81 | |
| 82 | /* from the request */ |
| 83 | u_int port; |
| 84 | } client, server; |
| 85 | SIMPLEQ_ENTRY(ident_client)struct { struct ident_client *sqe_next; } entry; |
| 86 | enum ident_client_state state; |
| 87 | struct event ev; |
| 88 | struct event tmo; |
| 89 | size_t rxbytes; |
| 90 | |
| 91 | char *buf; |
| 92 | size_t buflen; |
| 93 | size_t bufoff; |
| 94 | uid_t uid; |
| 95 | }; |
| 96 | |
| 97 | struct ident_resolver { |
| 98 | SIMPLEQ_ENTRY(ident_resolver)struct { struct ident_resolver *sqe_next; } entry; |
| 99 | char *buf; |
| 100 | size_t buflen; |
| 101 | u_int error; |
| 102 | }; |
| 103 | |
| 104 | struct identd_listener { |
| 105 | struct event ev, pause; |
| 106 | }; |
| 107 | |
| 108 | void parent_rd(int, short, void *); |
| 109 | void parent_wr(int, short, void *); |
| 110 | int parent_username(struct ident_resolver *, struct passwd *); |
| 111 | int parent_uid(struct ident_resolver *, struct passwd *); |
| 112 | int parent_token(struct ident_resolver *, struct passwd *); |
| 113 | void parent_noident(struct ident_resolver *, struct passwd *); |
| 114 | |
| 115 | void child_rd(int, short, void *); |
| 116 | void child_wr(int, short, void *); |
| 117 | |
| 118 | void identd_listen(const char *, const char *, int); |
| 119 | void identd_paused(int, short, void *); |
| 120 | void identd_accept(int, short, void *); |
| 121 | int identd_error(struct ident_client *, const char *); |
| 122 | void identd_close(struct ident_client *); |
| 123 | void identd_timeout(int, short, void *); |
| 124 | void identd_request(int, short, void *); |
| 125 | enum ident_client_state |
| 126 | identd_parse(struct ident_client *, int); |
| 127 | void identd_resolving(int, short, void *); |
| 128 | void identd_response(int, short, void *); |
| 129 | int fetchuid(struct ident_client *); |
| 130 | |
| 131 | const char *gethost(struct sockaddr_storage *); |
| 132 | const char *gentoken(void); |
| 133 | |
| 134 | struct loggers { |
| 135 | __dead__attribute__((__noreturn__)) void (*err)(int, const char *, ...) |
| 136 | __attribute__((__format__ (printf, 2, 3))); |
| 137 | __dead__attribute__((__noreturn__)) void (*errx)(int, const char *, ...) |
| 138 | __attribute__((__format__ (printf, 2, 3))); |
| 139 | void (*warn)(const char *, ...) |
| 140 | __attribute__((__format__ (printf, 1, 2))); |
| 141 | void (*warnx)(const char *, ...) |
| 142 | __attribute__((__format__ (printf, 1, 2))); |
| 143 | void (*notice)(const char *, ...) |
| 144 | __attribute__((__format__ (printf, 1, 2))); |
| 145 | void (*debug)(const char *, ...) |
| 146 | __attribute__((__format__ (printf, 1, 2))); |
| 147 | }; |
| 148 | |
| 149 | const struct loggers conslogger = { |
| 150 | err, |
| 151 | errx, |
| 152 | warn, |
| 153 | warnx, |
| 154 | warnx, /* notice */ |
| 155 | warnx /* debug */ |
| 156 | }; |
| 157 | |
| 158 | __dead__attribute__((__noreturn__)) void syslog_err(int, const char *, ...) |
| 159 | __attribute__((__format__ (printf, 2, 3))); |
| 160 | __dead__attribute__((__noreturn__)) void syslog_errx(int, const char *, ...) |
| 161 | __attribute__((__format__ (printf, 2, 3))); |
| 162 | void syslog_warn(const char *, ...) |
| 163 | __attribute__((__format__ (printf, 1, 2))); |
| 164 | void syslog_warnx(const char *, ...) |
| 165 | __attribute__((__format__ (printf, 1, 2))); |
| 166 | void syslog_notice(const char *, ...) |
| 167 | __attribute__((__format__ (printf, 1, 2))); |
| 168 | void syslog_debug(const char *, ...) |
| 169 | __attribute__((__format__ (printf, 1, 2))); |
| 170 | void syslog_vstrerror(int, int, const char *, va_list) |
| 171 | __attribute__((__format__ (printf, 3, 0))); |
| 172 | |
| 173 | const struct loggers syslogger = { |
| 174 | syslog_err, |
| 175 | syslog_errx, |
| 176 | syslog_warn, |
| 177 | syslog_warnx, |
| 178 | syslog_notice, |
| 179 | syslog_debug |
| 180 | }; |
| 181 | |
| 182 | const struct loggers *logger = &conslogger; |
| 183 | |
| 184 | #define lerr(_e, _f...)logger->err((_e), _f...) logger->err((_e), _f) |
| 185 | #define lerrx(_e, _f...)logger->errx((_e), _f...) logger->errx((_e), _f) |
| 186 | #define lwarn(_f...)logger->warn(_f...) logger->warn(_f) |
| 187 | #define lwarnx(_f...)logger->warnx(_f...) logger->warnx(_f) |
| 188 | #define lnotice(_f...)logger->notice(_f...) logger->notice(_f) |
| 189 | #define ldebug(_f...)logger->debug(_f...) logger->debug(_f) |
| 190 | |
| 191 | #define sa(_ss)((struct sockaddr *)(_ss)) ((struct sockaddr *)(_ss)) |
| 192 | |
| 193 | static __dead__attribute__((__noreturn__)) void |
| 194 | usage(void) |
| 195 | { |
| 196 | extern char *__progname; |
| 197 | fprintf(stderr(&__sF[2]), "usage: %s [-46deHhNn] [-l address] [-t timeout]\n", |
| 198 | __progname); |
| 199 | exit(1); |
| 200 | } |
| 201 | |
| 202 | struct timeval timeout = { TIMEOUT_DEFAULT120, 0 }; |
| 203 | int debug = 0; |
| 204 | int noident = 0; |
| 205 | int unknown_err = 0; |
| 206 | int hideall = 0; |
| 207 | |
| 208 | int (*parent_uprintf)(struct ident_resolver *, struct passwd *) = |
| 209 | parent_username; |
| 210 | |
| 211 | struct event proc_rd, proc_wr; |
| 212 | union { |
| 213 | struct { |
| 214 | SIMPLEQ_HEAD(, ident_resolver)struct { struct ident_resolver *sqh_first; struct ident_resolver **sqh_last; } replies; |
| 215 | } parent; |
| 216 | struct { |
| 217 | SIMPLEQ_HEAD(, ident_client)struct { struct ident_client *sqh_first; struct ident_client * *sqh_last; } pushing, popping; |
| 218 | } child; |
| 219 | } sc; |
| 220 | |
| 221 | int |
| 222 | main(int argc, char *argv[]) |
| 223 | { |
| 224 | extern char *__progname; |
| 225 | const char *errstr = NULL((void *)0); |
| 226 | |
| 227 | int c; |
| 228 | struct passwd *pw; |
| 229 | |
| 230 | char *addr = NULL((void *)0); |
| 231 | int family = AF_UNSPEC0; |
| 232 | |
| 233 | int pair[2]; |
| 234 | pid_t parent; |
| 235 | int sibling; |
| 236 | |
| 237 | while ((c = getopt(argc, argv, "46deHhl:Nnt:")) != -1) { |
| 238 | switch (c) { |
| 239 | case '4': |
| 240 | family = AF_INET2; |
| 241 | break; |
| 242 | case '6': |
| 243 | family = AF_INET624; |
| 244 | break; |
| 245 | case 'd': |
| 246 | debug = 1; |
| 247 | break; |
| 248 | case 'e': |
| 249 | unknown_err = 1; |
| 250 | break; |
| 251 | case 'H': |
| 252 | hideall = 1; |
| 253 | /* FALLTHROUGH */ |
| 254 | case 'h': |
| 255 | parent_uprintf = parent_token; |
| 256 | break; |
| 257 | case 'l': |
| 258 | addr = optarg; |
| 259 | break; |
| 260 | case 'N': |
| 261 | noident = 1; |
| 262 | break; |
| 263 | case 'n': |
| 264 | parent_uprintf = parent_uid; |
| 265 | break; |
| 266 | case 't': |
| 267 | timeout.tv_sec = strtonum(optarg, |
| 268 | TIMEOUT_MIN4, TIMEOUT_MAX240, &errstr); |
| 269 | if (errstr != NULL((void *)0)) |
| 270 | errx(1, "timeout %s is %s", optarg, errstr); |
| 271 | break; |
| 272 | default: |
| 273 | usage(); |
| 274 | /* NOTREACHED */ |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | argc -= optind; |
| 279 | argv += optind; |
Value stored to 'argv' is never read | |
| 280 | |
| 281 | if (argc != 0) |
| 282 | usage(); |
| 283 | |
| 284 | if (geteuid() != 0) |
| 285 | errx(1, "need root privileges"); |
| 286 | |
| 287 | if (socketpair(AF_UNIX1, SOCK_SEQPACKET5 | SOCK_NONBLOCK0x4000, |
| 288 | PF_UNSPEC0, pair) == -1) |
| 289 | err(1, "socketpair"); |
| 290 | |
| 291 | pw = getpwnam(IDENTD_USER"_identd"); |
| 292 | if (pw == NULL((void *)0)) |
| 293 | errx(1, "no %s user", IDENTD_USER"_identd"); |
| 294 | |
| 295 | if (!debug && daemon(1, 0) == -1) |
| 296 | err(1, "daemon"); |
| 297 | |
| 298 | parent = fork(); |
| 299 | switch (parent) { |
| 300 | case -1: |
| 301 | lerr(1, "fork")logger->err((1), "fork"); |
| 302 | |
| 303 | case 0: |
| 304 | /* child */ |
| 305 | setproctitle("listener"); |
| 306 | close(pair[1]); |
| 307 | sibling = pair[0]; |
| 308 | break; |
| 309 | |
| 310 | default: |
| 311 | /* parent */ |
| 312 | setproctitle("resolver"); |
| 313 | close(pair[0]); |
| 314 | sibling = pair[1]; |
| 315 | break; |
| 316 | } |
| 317 | |
| 318 | if (!debug) { |
| 319 | openlog(__progname, LOG_PID0x01|LOG_NDELAY0x08, LOG_DAEMON(3<<3)); |
| 320 | tzset(); |
| 321 | logger = &syslogger; |
| 322 | } |
| 323 | |
| 324 | event_init(); |
| 325 | |
| 326 | if (signal(SIGPIPE13, SIG_IGN(void (*)(int))1) == SIG_ERR(void (*)(int))-1) |
| 327 | lerr(1, "signal(SIGPIPE)")logger->err((1), "signal(SIGPIPE)"); |
| 328 | |
| 329 | if (parent) { |
| 330 | if (pledge("stdio getpw rpath id", NULL((void *)0)) == -1) |
| 331 | err(1, "pledge"); |
| 332 | |
| 333 | SIMPLEQ_INIT(&sc.parent.replies)do { (&sc.parent.replies)->sqh_first = ((void *)0); (& sc.parent.replies)->sqh_last = &(&sc.parent.replies )->sqh_first; } while (0); |
| 334 | |
| 335 | event_set(&proc_rd, sibling, EV_READ0x02 | EV_PERSIST0x10, |
| 336 | parent_rd, NULL((void *)0)); |
| 337 | event_set(&proc_wr, sibling, EV_WRITE0x04, |
| 338 | parent_wr, NULL((void *)0)); |
| 339 | } else { |
| 340 | SIMPLEQ_INIT(&sc.child.pushing)do { (&sc.child.pushing)->sqh_first = ((void *)0); (& sc.child.pushing)->sqh_last = &(&sc.child.pushing) ->sqh_first; } while (0); |
| 341 | SIMPLEQ_INIT(&sc.child.popping)do { (&sc.child.popping)->sqh_first = ((void *)0); (& sc.child.popping)->sqh_last = &(&sc.child.popping) ->sqh_first; } while (0); |
| 342 | |
| 343 | identd_listen(addr, "auth", family); |
| 344 | |
| 345 | if (chroot(pw->pw_dir) == -1) |
| 346 | lerr(1, "chroot(%s)", pw->pw_dir)logger->err((1), "chroot(%s)", pw->pw_dir); |
| 347 | |
| 348 | if (chdir("/") == -1) |
| 349 | lerr(1, "chdir(%s)", pw->pw_dir)logger->err((1), "chdir(%s)", pw->pw_dir); |
| 350 | |
| 351 | event_set(&proc_rd, sibling, EV_READ0x02 | EV_PERSIST0x10, |
| 352 | child_rd, NULL((void *)0)); |
| 353 | event_set(&proc_wr, sibling, EV_WRITE0x04, |
| 354 | child_wr, NULL((void *)0)); |
| 355 | } |
| 356 | |
| 357 | if (setgroups(1, &pw->pw_gid) || |
| 358 | setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) || |
| 359 | setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) |
| 360 | lerr(1, "unable to revoke privs")logger->err((1), "unable to revoke privs"); |
| 361 | |
| 362 | if (parent) { |
| 363 | if (noident) { |
| 364 | if (pledge("stdio getpw rpath", NULL((void *)0)) == -1) |
| 365 | err(1, "pledge"); |
| 366 | } else { |
| 367 | if (pledge("stdio getpw", NULL((void *)0)) == -1) |
| 368 | err(1, "pledge"); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | event_add(&proc_rd, NULL((void *)0)); |
| 373 | event_dispatch(); |
| 374 | return (0); |
| 375 | } |
| 376 | |
| 377 | void |
| 378 | parent_rd(int fd, short events, void *arg) |
| 379 | { |
| 380 | struct ident_resolver *r; |
| 381 | struct passwd *pw; |
| 382 | ssize_t n; |
| 383 | uid_t uid; |
| 384 | |
| 385 | n = read(fd, &uid, sizeof(uid)); |
| 386 | switch (n) { |
| 387 | case -1: |
| 388 | switch (errno(*__errno())) { |
| 389 | case EAGAIN35: |
| 390 | case EINTR4: |
| 391 | return; |
| 392 | default: |
| 393 | lerr(1, "parent read")logger->err((1), "parent read"); |
| 394 | } |
| 395 | break; |
| 396 | case 0: |
| 397 | lerrx(1, "child has gone")logger->errx((1), "child has gone"); |
| 398 | case sizeof(uid): |
| 399 | break; |
| 400 | default: |
| 401 | lerrx(1, "unexpected %zd data from child", n)logger->errx((1), "unexpected %zd data from child", n); |
| 402 | } |
| 403 | |
| 404 | r = calloc(1, sizeof(*r)); |
| 405 | if (r == NULL((void *)0)) |
| 406 | lerr(1, "resolver alloc")logger->err((1), "resolver alloc"); |
| 407 | |
| 408 | pw = getpwuid(uid); |
| 409 | if (pw == NULL((void *)0) && !hideall) { |
| 410 | r->error = E_NOUSER1; |
| 411 | goto done; |
| 412 | } |
| 413 | |
| 414 | if (noident && !hideall) { |
| 415 | parent_noident(r, pw); |
| 416 | if (r->error != E_NONE0) |
| 417 | goto done; |
| 418 | } |
| 419 | |
| 420 | n = (*parent_uprintf)(r, pw); |
| 421 | if (n == -1) { |
| 422 | r->error = E_UNKNOWN2; |
| 423 | goto done; |
| 424 | } |
| 425 | |
| 426 | r->buflen = n + 1; |
| 427 | |
| 428 | done: |
| 429 | SIMPLEQ_INSERT_TAIL(&sc.parent.replies, r, entry)do { (r)->entry.sqe_next = ((void *)0); *(&sc.parent.replies )->sqh_last = (r); (&sc.parent.replies)->sqh_last = &(r)->entry.sqe_next; } while (0); |
| 430 | event_add(&proc_wr, NULL((void *)0)); |
| 431 | } |
| 432 | |
| 433 | int |
| 434 | parent_username(struct ident_resolver *r, struct passwd *pw) |
| 435 | { |
| 436 | return (asprintf(&r->buf, "%s", pw->pw_name)); |
| 437 | } |
| 438 | |
| 439 | int |
| 440 | parent_uid(struct ident_resolver *r, struct passwd *pw) |
| 441 | { |
| 442 | return (asprintf(&r->buf, "%u", (u_int)pw->pw_uid)); |
| 443 | } |
| 444 | |
| 445 | int |
| 446 | parent_token(struct ident_resolver *r, struct passwd *pw) |
| 447 | { |
| 448 | const char *token; |
| 449 | int rv; |
| 450 | |
| 451 | token = gentoken(); |
| 452 | rv = asprintf(&r->buf, "%s", token); |
| 453 | if (rv != -1) { |
| 454 | if (pw) |
| 455 | lnotice("token %s == uid %u (%s)", token,logger->notice("token %s == uid %u (%s)", token, (u_int)pw ->pw_uid, pw->pw_name) |
| 456 | (u_int)pw->pw_uid, pw->pw_name)logger->notice("token %s == uid %u (%s)", token, (u_int)pw ->pw_uid, pw->pw_name); |
| 457 | else |
| 458 | lnotice("token %s == NO USER", token)logger->notice("token %s == NO USER", token); |
| 459 | } |
| 460 | |
| 461 | return (rv); |
| 462 | } |
| 463 | |
| 464 | void |
| 465 | parent_noident(struct ident_resolver *r, struct passwd *pw) |
| 466 | { |
| 467 | char path[PATH_MAX1024]; |
| 468 | struct stat st; |
| 469 | int rv; |
| 470 | |
| 471 | rv = snprintf(path, sizeof(path), "%s/%s", pw->pw_dir, DOTNOIDENT".noident"); |
| 472 | if (rv < 0 || rv >= sizeof(path)) { |
| 473 | r->error = E_UNKNOWN2; |
| 474 | return; |
| 475 | } |
| 476 | |
| 477 | if (stat(path, &st) == -1) |
| 478 | return; |
| 479 | |
| 480 | r->error = E_HIDDEN3; |
| 481 | } |
| 482 | |
| 483 | void |
| 484 | parent_wr(int fd, short events, void *arg) |
| 485 | { |
| 486 | struct ident_resolver *r = SIMPLEQ_FIRST(&sc.parent.replies)((&sc.parent.replies)->sqh_first); |
| 487 | struct iovec iov[2]; |
| 488 | int iovcnt = 0; |
| 489 | ssize_t n; |
| 490 | |
| 491 | iov[iovcnt].iov_base = &r->error; |
| 492 | iov[iovcnt].iov_len = sizeof(r->error); |
| 493 | iovcnt++; |
| 494 | |
| 495 | if (r->buflen > 0) { |
| 496 | iov[iovcnt].iov_base = r->buf; |
| 497 | iov[iovcnt].iov_len = r->buflen; |
| 498 | iovcnt++; |
| 499 | } |
| 500 | |
| 501 | n = writev(fd, iov, iovcnt); |
| 502 | if (n == -1) { |
| 503 | switch (errno(*__errno())) { |
| 504 | case EINTR4: |
| 505 | case EAGAIN35: |
| 506 | event_add(&proc_wr, NULL((void *)0)); |
| 507 | return; |
| 508 | default: |
| 509 | lerr(1, "parent write")logger->err((1), "parent write"); |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | if (n != sizeof(r->error) + r->buflen) |
| 514 | lerrx(1, "unexpected parent write length %zd", n)logger->errx((1), "unexpected parent write length %zd", n); |
| 515 | |
| 516 | SIMPLEQ_REMOVE_HEAD(&sc.parent.replies, entry)do { if (((&sc.parent.replies)->sqh_first = (&sc.parent .replies)->sqh_first->entry.sqe_next) == ((void *)0)) ( &sc.parent.replies)->sqh_last = &(&sc.parent.replies )->sqh_first; } while (0); |
| 517 | |
| 518 | if (r->buflen > 0) |
| 519 | free(r->buf); |
| 520 | |
| 521 | free(r); |
| 522 | |
| 523 | if (!SIMPLEQ_EMPTY(&sc.parent.replies)(((&sc.parent.replies)->sqh_first) == ((void *)0))) |
| 524 | event_add(&proc_wr, NULL((void *)0)); |
| 525 | } |
| 526 | |
| 527 | void |
| 528 | child_rd(int fd, short events, void *arg) |
| 529 | { |
| 530 | struct ident_client *c; |
| 531 | struct { |
| 532 | u_int error; |
| 533 | char buf[512]; |
| 534 | } reply; |
| 535 | ssize_t n; |
| 536 | |
| 537 | n = read(fd, &reply, sizeof(reply)); |
| 538 | switch (n) { |
| 539 | case -1: |
| 540 | switch (errno(*__errno())) { |
| 541 | case EAGAIN35: |
| 542 | case EINTR4: |
| 543 | return; |
| 544 | default: |
| 545 | lerr(1, "child read")logger->err((1), "child read"); |
| 546 | } |
| 547 | break; |
| 548 | case 0: |
| 549 | lerrx(1, "parent has gone")logger->errx((1), "parent has gone"); |
| 550 | default: |
| 551 | break; |
| 552 | } |
| 553 | |
| 554 | c = SIMPLEQ_FIRST(&sc.child.popping)((&sc.child.popping)->sqh_first); |
| 555 | if (c == NULL((void *)0)) |
| 556 | lerrx(1, "unsolicited data from parent")logger->errx((1), "unsolicited data from parent"); |
| 557 | |
| 558 | SIMPLEQ_REMOVE_HEAD(&sc.child.popping, entry)do { if (((&sc.child.popping)->sqh_first = (&sc.child .popping)->sqh_first->entry.sqe_next) == ((void *)0)) ( &sc.child.popping)->sqh_last = &(&sc.child.popping )->sqh_first; } while (0); |
| 559 | |
| 560 | if (n < sizeof(reply.error)) |
| 561 | lerrx(1, "short data from parent")logger->errx((1), "short data from parent"); |
| 562 | |
| 563 | /* check if something went wrong while the parent was working */ |
| 564 | if (c->state == S_DEAD) { |
| 565 | free(c); |
| 566 | return; |
| 567 | } |
| 568 | c->state = S_DEAD; |
| 569 | |
| 570 | switch (reply.error) { |
| 571 | case E_NONE0: |
| 572 | n = asprintf(&c->buf, "%u , %u : USERID : UNIX : %s\r\n", |
| 573 | c->server.port, c->client.port, reply.buf); |
| 574 | break; |
| 575 | case E_NOUSER1: |
| 576 | n = asprintf(&c->buf, "%u , %u : ERROR : %s\r\n", |
| 577 | c->server.port, c->client.port, |
| 578 | unknown_err ? "UNKNOWN-ERROR" : "NO-USER"); |
| 579 | break; |
| 580 | case E_UNKNOWN2: |
| 581 | n = asprintf(&c->buf, "%u , %u : ERROR : UNKNOWN-ERROR\r\n", |
| 582 | c->server.port, c->client.port); |
| 583 | break; |
| 584 | case E_HIDDEN3: |
| 585 | n = asprintf(&c->buf, "%u , %u : ERROR : HIDDEN-USER\r\n", |
| 586 | c->server.port, c->client.port); |
| 587 | break; |
| 588 | default: |
| 589 | lerrx(1, "unexpected error from parent %u", reply.error)logger->errx((1), "unexpected error from parent %u", reply .error); |
| 590 | } |
| 591 | if (n == -1) |
| 592 | goto fail; |
| 593 | |
| 594 | c->buflen = n; |
| 595 | |
| 596 | fd = EVENT_FD(&c->ev)(int)(&c->ev)->ev_fd; |
| 597 | event_del(&c->ev); |
| 598 | event_set(&c->ev, fd, EV_READ0x02 | EV_WRITE0x04 | EV_PERSIST0x10, |
| 599 | identd_response, c); |
| 600 | event_add(&c->ev, NULL((void *)0)); |
| 601 | return; |
| 602 | |
| 603 | fail: |
| 604 | identd_close(c); |
| 605 | } |
| 606 | |
| 607 | void |
| 608 | child_wr(int fd, short events, void *arg) |
| 609 | { |
| 610 | struct ident_client *c = SIMPLEQ_FIRST(&sc.child.pushing)((&sc.child.pushing)->sqh_first); |
| 611 | const char *errstr = NULL((void *)0); |
| 612 | ssize_t n; |
| 613 | |
| 614 | n = write(fd, &c->uid, sizeof(c->uid)); |
| 615 | switch (n) { |
| 616 | case -1: |
| 617 | switch (errno(*__errno())) { |
| 618 | case EINTR4: |
| 619 | case EAGAIN35: |
| 620 | event_add(&proc_wr, NULL((void *)0)); |
| 621 | return; |
| 622 | case ENOBUFS55: /* parent has a backlog of requests */ |
| 623 | errstr = "UNKNOWN-ERROR"; |
| 624 | break; |
| 625 | default: |
| 626 | lerr(1, "child write")logger->err((1), "child write"); |
| 627 | } |
| 628 | break; |
| 629 | case sizeof(c->uid): |
| 630 | break; |
| 631 | default: |
| 632 | lerrx(1, "unexpected child write length %zd", n)logger->errx((1), "unexpected child write length %zd", n); |
| 633 | } |
| 634 | |
| 635 | SIMPLEQ_REMOVE_HEAD(&sc.child.pushing, entry)do { if (((&sc.child.pushing)->sqh_first = (&sc.child .pushing)->sqh_first->entry.sqe_next) == ((void *)0)) ( &sc.child.pushing)->sqh_last = &(&sc.child.pushing )->sqh_first; } while (0); |
| 636 | if (errstr == NULL((void *)0)) |
| 637 | SIMPLEQ_INSERT_TAIL(&sc.child.popping, c, entry)do { (c)->entry.sqe_next = ((void *)0); *(&sc.child.popping )->sqh_last = (c); (&sc.child.popping)->sqh_last = & (c)->entry.sqe_next; } while (0); |
| 638 | else if (identd_error(c, errstr) == -1) |
| 639 | identd_close(c); |
| 640 | |
| 641 | if (!SIMPLEQ_EMPTY(&sc.child.pushing)(((&sc.child.pushing)->sqh_first) == ((void *)0))) |
| 642 | event_add(&proc_wr, NULL((void *)0)); |
| 643 | } |
| 644 | |
| 645 | void |
| 646 | identd_listen(const char *addr, const char *port, int family) |
| 647 | { |
| 648 | struct identd_listener *l = NULL((void *)0); |
| 649 | |
| 650 | struct addrinfo hints, *res, *res0; |
| 651 | int error, s; |
| 652 | const char *cause = NULL((void *)0); |
| 653 | int on = 1; |
| 654 | |
| 655 | memset(&hints, 0, sizeof(hints)); |
| 656 | hints.ai_family = family; |
| 657 | hints.ai_socktype = SOCK_STREAM1; |
| 658 | hints.ai_flags = AI_PASSIVE1; |
| 659 | |
| 660 | error = getaddrinfo(addr, port, &hints, &res0); |
| 661 | if (error) |
| 662 | lerrx(1, "%s/%s: %s", addr, port, gai_strerror(error))logger->errx((1), "%s/%s: %s", addr, port, gai_strerror(error )); |
| 663 | |
| 664 | for (res = res0; res != NULL((void *)0); res = res->ai_next) { |
| 665 | s = socket(res->ai_family, res->ai_socktype | SOCK_NONBLOCK0x4000, |
| 666 | res->ai_protocol); |
| 667 | if (s == -1) { |
| 668 | cause = "socket"; |
| 669 | continue; |
| 670 | } |
| 671 | |
| 672 | if (setsockopt(s, SOL_SOCKET0xffff, SO_REUSEADDR0x0004, |
| 673 | &on, sizeof(on)) == -1) |
| 674 | err(1, "listener setsockopt(SO_REUSEADDR)"); |
| 675 | |
| 676 | if (bind(s, res->ai_addr, res->ai_addrlen) == -1) { |
| 677 | int serrno = errno(*__errno()); |
| 678 | |
| 679 | cause = "bind"; |
| 680 | close(s); |
| 681 | errno(*__errno()) = serrno; |
| 682 | continue; |
| 683 | } |
| 684 | |
| 685 | if (listen(s, 5) == -1) |
| 686 | err(1, "listen"); |
| 687 | |
| 688 | l = calloc(1, sizeof(*l)); |
| 689 | if (l == NULL((void *)0)) |
| 690 | err(1, "listener ev alloc"); |
| 691 | |
| 692 | event_set(&l->ev, s, EV_READ0x02 | EV_PERSIST0x10, identd_accept, l); |
| 693 | event_add(&l->ev, NULL((void *)0)); |
| 694 | evtimer_set(&l->pause, identd_paused, l)event_set(&l->pause, -1, 0, identd_paused, l); |
| 695 | } |
| 696 | if (l == NULL((void *)0)) |
| 697 | err(1, "%s", cause); |
| 698 | |
| 699 | freeaddrinfo(res0); |
| 700 | } |
| 701 | |
| 702 | void |
| 703 | identd_paused(int fd, short events, void *arg) |
| 704 | { |
| 705 | struct identd_listener *l = arg; |
| 706 | event_add(&l->ev, NULL((void *)0)); |
| 707 | } |
| 708 | |
| 709 | void |
| 710 | identd_accept(int fd, short events, void *arg) |
| 711 | { |
| 712 | struct identd_listener *l = arg; |
| 713 | struct sockaddr_storage ss; |
| 714 | struct timeval pause = { 1, 0 }; |
| 715 | struct ident_client *c = NULL((void *)0); |
| 716 | socklen_t len; |
| 717 | int s; |
| 718 | |
| 719 | len = sizeof(ss); |
| 720 | s = accept4(fd, sa(&ss)((struct sockaddr *)(&ss)), &len, SOCK_NONBLOCK0x4000); |
| 721 | if (s == -1) { |
| 722 | switch (errno(*__errno())) { |
| 723 | case EINTR4: |
| 724 | case EWOULDBLOCK35: |
| 725 | case ECONNABORTED53: |
| 726 | return; |
| 727 | case EMFILE24: |
| 728 | case ENFILE23: |
| 729 | event_del(&l->ev); |
| 730 | evtimer_add(&l->pause, &pause)event_add(&l->pause, &pause); |
| 731 | return; |
| 732 | default: |
| 733 | lerr(1, "accept")logger->err((1), "accept"); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | c = calloc(1, sizeof(*c)); |
| 738 | if (c == NULL((void *)0)) { |
| 739 | lwarn("client alloc")logger->warn("client alloc"); |
| 740 | close(fd); |
| 741 | return; |
| 742 | } |
| 743 | |
| 744 | memcpy(&c->client.ss, &ss, len); |
| 745 | c->client.len = len; |
| 746 | ldebug("client: %s", gethost(&ss))logger->debug("client: %s", gethost(&ss)); |
| 747 | |
| 748 | /* lookup the local ip it connected to */ |
| 749 | c->server.len = sizeof(c->server.ss); |
| 750 | if (getsockname(s, sa(&c->server.ss)((struct sockaddr *)(&c->server.ss)), &c->server.len) == -1) |
| 751 | lerr(1, "getsockname")logger->err((1), "getsockname"); |
| 752 | |
| 753 | event_set(&c->ev, s, EV_READ0x02 | EV_PERSIST0x10, identd_request, c); |
| 754 | event_add(&c->ev, NULL((void *)0)); |
| 755 | |
| 756 | evtimer_set(&c->tmo, identd_timeout, c)event_set(&c->tmo, -1, 0, identd_timeout, c); |
| 757 | evtimer_add(&c->tmo, &timeout)event_add(&c->tmo, &timeout); |
| 758 | } |
| 759 | |
| 760 | void |
| 761 | identd_timeout(int fd, short events, void *arg) |
| 762 | { |
| 763 | struct ident_client *c = arg; |
| 764 | |
| 765 | event_del(&c->ev); |
| 766 | close(fd); |
| 767 | free(c->buf); |
| 768 | |
| 769 | if (c->state == S_QUEUED) /* it is queued for resolving */ |
| 770 | c->state = S_DEAD; |
| 771 | else |
| 772 | free(c); |
| 773 | } |
| 774 | |
| 775 | void |
| 776 | identd_request(int fd, short events, void *arg) |
| 777 | { |
| 778 | struct ident_client *c = arg; |
| 779 | unsigned char buf[64]; |
| 780 | ssize_t n, i; |
| 781 | char *errstr = unknown_err ? "UNKNOWN-ERROR" : "INVALID-PORT"; |
| 782 | |
| 783 | n = read(fd, buf, sizeof(buf)); |
| 784 | switch (n) { |
| 785 | case -1: |
| 786 | switch (errno(*__errno())) { |
| 787 | case EINTR4: |
| 788 | case EAGAIN35: |
| 789 | return; |
| 790 | default: |
| 791 | lwarn("%s read", gethost(&c->client.ss))logger->warn("%s read", gethost(&c->client.ss)); |
| 792 | goto fail; |
| 793 | } |
| 794 | break; |
| 795 | |
| 796 | case 0: |
| 797 | ldebug("%s closed connection", gethost(&c->client.ss))logger->debug("%s closed connection", gethost(&c->client .ss)); |
| 798 | goto fail; |
| 799 | default: |
| 800 | break; |
| 801 | } |
| 802 | |
| 803 | c->rxbytes += n; |
| 804 | if (c->rxbytes >= INPUT_MAX256) |
| 805 | goto fail; |
| 806 | |
| 807 | for (i = 0; c->state < S_EOL && i < n; i++) |
| 808 | c->state = identd_parse(c, buf[i]); |
| 809 | |
| 810 | if (c->state == S_DEAD) |
| 811 | goto error; |
| 812 | if (c->state != S_EOL) |
| 813 | return; |
| 814 | |
| 815 | if (c->server.port < 1 || c->client.port < 1) |
| 816 | goto error; |
| 817 | |
| 818 | if (fetchuid(c) == -1) { |
| 819 | errstr = unknown_err ? "UNKNOWN-ERROR" : "NO-USER"; |
| 820 | goto error; |
| 821 | } |
| 822 | |
| 823 | SIMPLEQ_INSERT_TAIL(&sc.child.pushing, c, entry)do { (c)->entry.sqe_next = ((void *)0); *(&sc.child.pushing )->sqh_last = (c); (&sc.child.pushing)->sqh_last = & (c)->entry.sqe_next; } while (0); |
| 824 | c->state = S_QUEUED; |
| 825 | |
| 826 | event_del(&c->ev); |
| 827 | event_set(&c->ev, fd, EV_READ0x02 | EV_PERSIST0x10, identd_resolving, c); |
| 828 | event_add(&c->ev, NULL((void *)0)); |
| 829 | |
| 830 | event_add(&proc_wr, NULL((void *)0)); |
| 831 | return; |
| 832 | |
| 833 | error: |
| 834 | if (identd_error(c, errstr) == -1) |
| 835 | goto fail; |
| 836 | |
| 837 | return; |
| 838 | |
| 839 | fail: |
| 840 | identd_close(c); |
| 841 | } |
| 842 | |
| 843 | int |
| 844 | identd_error(struct ident_client *c, const char *errstr) |
| 845 | { |
| 846 | int fd = EVENT_FD(&c->ev)(int)(&c->ev)->ev_fd; |
| 847 | ssize_t n; |
| 848 | |
| 849 | n = asprintf(&c->buf, "%u , %u : ERROR : %s\r\n", |
| 850 | c->server.port, c->client.port, errstr); |
| 851 | if (n == -1) |
| 852 | return (-1); |
| 853 | |
| 854 | c->buflen = n; |
| 855 | |
| 856 | event_del(&c->ev); |
| 857 | event_set(&c->ev, fd, EV_READ0x02 | EV_WRITE0x04 | EV_PERSIST0x10, |
| 858 | identd_response, c); |
| 859 | event_add(&c->ev, NULL((void *)0)); |
| 860 | |
| 861 | return (0); |
| 862 | } |
| 863 | |
| 864 | void |
| 865 | identd_close(struct ident_client *c) |
| 866 | { |
| 867 | int fd = EVENT_FD(&c->ev)(int)(&c->ev)->ev_fd; |
| 868 | |
| 869 | evtimer_del(&c->tmo)event_del(&c->tmo); |
| 870 | event_del(&c->ev); |
| 871 | close(fd); |
| 872 | free(c->buf); |
| 873 | free(c); |
| 874 | } |
| 875 | |
| 876 | void |
| 877 | identd_resolving(int fd, short events, void *arg) |
| 878 | { |
| 879 | struct ident_client *c = arg; |
| 880 | char buf[64]; |
| 881 | ssize_t n; |
| 882 | |
| 883 | /* |
| 884 | * something happened while we're waiting for the parent to lookup |
| 885 | * the user. |
| 886 | */ |
| 887 | |
| 888 | n = read(fd, buf, sizeof(buf)); |
| 889 | switch (n) { |
| 890 | case -1: |
| 891 | switch (errno(*__errno())) { |
| 892 | case EINTR4: |
| 893 | case EAGAIN35: |
| 894 | return; |
| 895 | default: |
| 896 | lwarn("resolving read")logger->warn("resolving read"); |
| 897 | break; |
| 898 | } |
| 899 | break; |
| 900 | case 0: |
| 901 | ldebug("%s closed connection during resolving",logger->debug("%s closed connection during resolving", gethost (&c->client.ss)) |
| 902 | gethost(&c->client.ss))logger->debug("%s closed connection during resolving", gethost (&c->client.ss)); |
| 903 | break; |
| 904 | default: |
| 905 | c->rxbytes += n; |
| 906 | if (c->rxbytes >= INPUT_MAX256) |
| 907 | break; |
| 908 | |
| 909 | /* ignore extra input */ |
| 910 | return; |
| 911 | } |
| 912 | |
| 913 | evtimer_del(&c->tmo)event_del(&c->tmo); |
| 914 | event_del(&c->ev); |
| 915 | close(fd); |
| 916 | c->state = S_DEAD; /* on the resolving queue */ |
| 917 | } |
| 918 | |
| 919 | enum ident_client_state |
| 920 | identd_parse(struct ident_client *c, int ch) |
| 921 | { |
| 922 | enum ident_client_state s = c->state; |
| 923 | |
| 924 | switch (s) { |
| 925 | case S_BEGINNING: |
| 926 | /* ignore leading space */ |
| 927 | if (ch == '\t' || ch == ' ') |
| 928 | return (s); |
| 929 | |
| 930 | if (ch == '0' || !isdigit(ch)) |
| 931 | return (S_DEAD); |
| 932 | |
| 933 | c->server.port = ch - '0'; |
| 934 | return (S_SERVER_PORT); |
| 935 | |
| 936 | case S_SERVER_PORT: |
| 937 | if (ch == '\t' || ch == ' ') |
| 938 | return (S_PRE_COMMA); |
| 939 | if (ch == ',') |
| 940 | return (S_POST_COMMA); |
| 941 | |
| 942 | if (!isdigit(ch)) |
| 943 | return (S_DEAD); |
| 944 | |
| 945 | c->server.port *= 10; |
| 946 | c->server.port += ch - '0'; |
| 947 | if (c->server.port > 65535) |
| 948 | return (S_DEAD); |
| 949 | |
| 950 | return (s); |
| 951 | |
| 952 | case S_PRE_COMMA: |
| 953 | if (ch == '\t' || ch == ' ') |
| 954 | return (s); |
| 955 | if (ch == ',') |
| 956 | return (S_POST_COMMA); |
| 957 | |
| 958 | return (S_DEAD); |
| 959 | |
| 960 | case S_POST_COMMA: |
| 961 | if (ch == '\t' || ch == ' ') |
| 962 | return (s); |
| 963 | |
| 964 | if (ch == '0' || !isdigit(ch)) |
| 965 | return (S_DEAD); |
| 966 | |
| 967 | c->client.port = ch - '0'; |
| 968 | return (S_CLIENT_PORT); |
| 969 | |
| 970 | case S_CLIENT_PORT: |
| 971 | if (ch == '\t' || ch == ' ') |
| 972 | return (S_PRE_EOL); |
| 973 | if (ch == '\r' || ch == '\n') |
| 974 | return (S_EOL); |
| 975 | |
| 976 | if (!isdigit(ch)) |
| 977 | return (S_DEAD); |
| 978 | |
| 979 | c->client.port *= 10; |
| 980 | c->client.port += ch - '0'; |
| 981 | if (c->client.port > 65535) |
| 982 | return (S_DEAD); |
| 983 | |
| 984 | return (s); |
| 985 | |
| 986 | case S_PRE_EOL: |
| 987 | if (ch == '\t' || ch == ' ') |
| 988 | return (s); |
| 989 | if (ch == '\r' || ch == '\n') |
| 990 | return (S_EOL); |
| 991 | |
| 992 | return (S_DEAD); |
| 993 | |
| 994 | case S_EOL: |
| 995 | /* ignore trailing garbage */ |
| 996 | return (s); |
| 997 | |
| 998 | default: |
| 999 | return (S_DEAD); |
| 1000 | } |
| 1001 | } |
| 1002 | |
| 1003 | void |
| 1004 | identd_response(int fd, short events, void *arg) |
| 1005 | { |
| 1006 | struct ident_client *c = arg; |
| 1007 | char buf[64]; |
| 1008 | ssize_t n; |
| 1009 | |
| 1010 | if (events & EV_READ0x02) { |
| 1011 | n = read(fd, buf, sizeof(buf)); |
| 1012 | switch (n) { |
| 1013 | case -1: |
| 1014 | switch (errno(*__errno())) { |
| 1015 | case EINTR4: |
| 1016 | case EAGAIN35: |
| 1017 | /* meh, try a write */ |
| 1018 | break; |
| 1019 | default: |
| 1020 | lwarn("response read")logger->warn("response read"); |
| 1021 | goto done; |
| 1022 | } |
| 1023 | break; |
| 1024 | case 0: |
| 1025 | ldebug("%s closed connection during response",logger->debug("%s closed connection during response", gethost (&c->client.ss)) |
| 1026 | gethost(&c->client.ss))logger->debug("%s closed connection during response", gethost (&c->client.ss)); |
| 1027 | goto done; |
| 1028 | default: |
| 1029 | c->rxbytes += n; |
| 1030 | if (c->rxbytes >= INPUT_MAX256) |
| 1031 | goto done; |
| 1032 | |
| 1033 | /* ignore extra input */ |
| 1034 | break; |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | if (!(events & EV_WRITE0x04)) |
| 1039 | return; /* try again later */ |
| 1040 | |
| 1041 | n = write(fd, c->buf + c->bufoff, c->buflen - c->bufoff); |
| 1042 | if (n == -1) { |
| 1043 | switch (errno(*__errno())) { |
| 1044 | case EINTR4: |
| 1045 | case EAGAIN35: |
| 1046 | return; /* try again later */ |
| 1047 | case EPIPE32: |
| 1048 | goto done; |
| 1049 | default: |
| 1050 | lwarn("response write")logger->warn("response write"); |
| 1051 | goto done; |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | c->bufoff += n; |
| 1056 | if (c->bufoff != c->buflen) |
| 1057 | return; /* try again later */ |
| 1058 | |
| 1059 | done: |
| 1060 | identd_close(c); |
| 1061 | } |
| 1062 | |
| 1063 | void |
| 1064 | syslog_vstrerror(int e, int priority, const char *fmt, va_list ap) |
| 1065 | { |
| 1066 | char *s; |
| 1067 | |
| 1068 | if (vasprintf(&s, fmt, ap) == -1) { |
| 1069 | syslog(LOG_EMERG0, "unable to alloc in syslog_vstrerror"); |
| 1070 | exit(1); |
| 1071 | } |
| 1072 | syslog(priority, "%s: %s", s, strerror(e)); |
| 1073 | free(s); |
| 1074 | } |
| 1075 | |
| 1076 | void |
| 1077 | syslog_err(int ecode, const char *fmt, ...) |
| 1078 | { |
| 1079 | va_list ap; |
| 1080 | |
| 1081 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1082 | syslog_vstrerror(errno(*__errno()), LOG_CRIT2, fmt, ap); |
| 1083 | va_end(ap)__builtin_va_end(ap); |
| 1084 | exit(ecode); |
| 1085 | } |
| 1086 | |
| 1087 | void |
| 1088 | syslog_errx(int ecode, const char *fmt, ...) |
| 1089 | { |
| 1090 | va_list ap; |
| 1091 | |
| 1092 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1093 | vsyslog(LOG_CRIT2, fmt, ap); |
| 1094 | va_end(ap)__builtin_va_end(ap); |
| 1095 | exit(ecode); |
| 1096 | } |
| 1097 | |
| 1098 | void |
| 1099 | syslog_warn(const char *fmt, ...) |
| 1100 | { |
| 1101 | va_list ap; |
| 1102 | |
| 1103 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1104 | syslog_vstrerror(errno(*__errno()), LOG_ERR3, fmt, ap); |
| 1105 | va_end(ap)__builtin_va_end(ap); |
| 1106 | } |
| 1107 | |
| 1108 | void |
| 1109 | syslog_warnx(const char *fmt, ...) |
| 1110 | { |
| 1111 | va_list ap; |
| 1112 | |
| 1113 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1114 | vsyslog(LOG_ERR3, fmt, ap); |
| 1115 | va_end(ap)__builtin_va_end(ap); |
| 1116 | } |
| 1117 | |
| 1118 | void |
| 1119 | syslog_notice(const char *fmt, ...) |
| 1120 | { |
| 1121 | va_list ap; |
| 1122 | |
| 1123 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1124 | vsyslog(LOG_NOTICE5, fmt, ap); |
| 1125 | va_end(ap)__builtin_va_end(ap); |
| 1126 | } |
| 1127 | |
| 1128 | void |
| 1129 | syslog_debug(const char *fmt, ...) |
| 1130 | { |
| 1131 | va_list ap; |
| 1132 | |
| 1133 | if (!debug) |
| 1134 | return; |
| 1135 | |
| 1136 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1137 | vsyslog(LOG_DEBUG7, fmt, ap); |
| 1138 | va_end(ap)__builtin_va_end(ap); |
| 1139 | } |
| 1140 | |
| 1141 | const char * |
| 1142 | gethost(struct sockaddr_storage *ss) |
| 1143 | { |
| 1144 | struct sockaddr *sa = (struct sockaddr *)ss; |
| 1145 | static char buf[NI_MAXHOST256]; |
| 1146 | |
| 1147 | if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf), |
| 1148 | NULL((void *)0), 0, NI_NUMERICHOST1) != 0) |
| 1149 | return ("(unknown)"); |
| 1150 | |
| 1151 | return (buf); |
| 1152 | } |
| 1153 | |
| 1154 | const char * |
| 1155 | gentoken(void) |
| 1156 | { |
| 1157 | static char buf[21]; |
| 1158 | u_int32_t r; |
| 1159 | int i; |
| 1160 | |
| 1161 | buf[0] = 'a' + arc4random_uniform(26); |
| 1162 | for (i = 1; i < sizeof(buf) - 1; i++) { |
| 1163 | r = arc4random_uniform(36); |
| 1164 | buf[i] = (r < 26 ? 'a' : '0' - 26) + r; |
| 1165 | } |
| 1166 | buf[i] = '\0'; |
| 1167 | |
| 1168 | return (buf); |
| 1169 | } |
| 1170 | |
| 1171 | int |
| 1172 | fetchuid(struct ident_client *c) |
| 1173 | { |
| 1174 | struct tcp_ident_mapping tir; |
| 1175 | int mib[] = { CTL_NET4, PF_INET2, IPPROTO_TCP6, TCPCTL_IDENT9 }; |
| 1176 | struct sockaddr_in *s4; |
| 1177 | struct sockaddr_in6 *s6; |
| 1178 | int err = 0; |
| 1179 | size_t len; |
| 1180 | |
| 1181 | memset(&tir, 0, sizeof(tir)); |
| 1182 | memcpy(&tir.faddr, &c->client.ss, sizeof(tir.faddr)); |
| 1183 | memcpy(&tir.laddr, &c->server.ss, sizeof(tir.laddr)); |
| 1184 | |
| 1185 | switch (c->server.ss.ss_family) { |
| 1186 | case AF_INET2: |
| 1187 | s4 = (struct sockaddr_in *)&tir.faddr; |
| 1188 | s4->sin_port = htons(c->client.port)(__uint16_t)(__builtin_constant_p(c->client.port) ? (__uint16_t )(((__uint16_t)(c->client.port) & 0xffU) << 8 | ( (__uint16_t)(c->client.port) & 0xff00U) >> 8) : __swap16md (c->client.port)); |
| 1189 | |
| 1190 | s4 = (struct sockaddr_in *)&tir.laddr; |
| 1191 | s4->sin_port = htons(c->server.port)(__uint16_t)(__builtin_constant_p(c->server.port) ? (__uint16_t )(((__uint16_t)(c->server.port) & 0xffU) << 8 | ( (__uint16_t)(c->server.port) & 0xff00U) >> 8) : __swap16md (c->server.port)); |
| 1192 | break; |
| 1193 | case AF_INET624: |
| 1194 | s6 = (struct sockaddr_in6 *)&tir.faddr; |
| 1195 | s6->sin6_port = htons(c->client.port)(__uint16_t)(__builtin_constant_p(c->client.port) ? (__uint16_t )(((__uint16_t)(c->client.port) & 0xffU) << 8 | ( (__uint16_t)(c->client.port) & 0xff00U) >> 8) : __swap16md (c->client.port)); |
| 1196 | |
| 1197 | s6 = (struct sockaddr_in6 *)&tir.laddr; |
| 1198 | s6->sin6_port = htons(c->server.port)(__uint16_t)(__builtin_constant_p(c->server.port) ? (__uint16_t )(((__uint16_t)(c->server.port) & 0xffU) << 8 | ( (__uint16_t)(c->server.port) & 0xff00U) >> 8) : __swap16md (c->server.port)); |
| 1199 | break; |
| 1200 | default: |
| 1201 | lerrx(1, "unexpected family %d", c->server.ss.ss_family)logger->errx((1), "unexpected family %d", c->server.ss. ss_family); |
| 1202 | } |
| 1203 | |
| 1204 | len = sizeof(tir); |
| 1205 | err = sysctl(mib, sizeof(mib) / sizeof(mib[0]), &tir, &len, NULL((void *)0), 0); |
| 1206 | if (err == -1) |
| 1207 | lerr(1, "sysctl")logger->err((1), "sysctl"); |
| 1208 | |
| 1209 | if (tir.ruid == -1) |
| 1210 | return (-1); |
| 1211 | |
| 1212 | c->uid = tir.ruid; |
| 1213 | return (0); |
| 1214 | } |