| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Admin interface for configuration |
| 4 | * |
| 5 | * (c) 2001 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of Trivial IP Encryption (TrIPE). |
| 11 | * |
| 12 | * TrIPE is free software: you can redistribute it and/or modify it under |
| 13 | * the terms of the GNU General Public License as published by the Free |
| 14 | * Software Foundation; either version 3 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * TrIPE is distributed in the hope that it will be useful, but WITHOUT |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 20 | * for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | /*----- Header files ------------------------------------------------------*/ |
| 27 | |
| 28 | #include "tripe.h" |
| 29 | |
| 30 | /*----- Global variables --------------------------------------------------*/ |
| 31 | |
| 32 | #ifndef NTRACE |
| 33 | |
| 34 | const trace_opt tr_opts[] = { |
| 35 | { 't', T_TUNNEL, "tunnel events" }, |
| 36 | { 'r', T_PEER, "peer events" }, |
| 37 | { 'a', T_ADMIN, "admin interface" }, |
| 38 | { 's', T_KEYSET, "symmetric keyset management" }, |
| 39 | { 'x', T_KEYEXCH, "key exchange" }, |
| 40 | { 'm', T_KEYMGMT, "key management" }, |
| 41 | { 'l', T_CHAL, "challenge management" }, |
| 42 | { 'v', T_PRIVSEP, "privilege separation" }, |
| 43 | { 'p', T_PACKET, "packet contents" }, |
| 44 | { 'c', T_CRYPTO, "crypto details" }, |
| 45 | { 'A', T_ALL, "all of the above" }, |
| 46 | { 0, 0, 0 } |
| 47 | }; |
| 48 | |
| 49 | unsigned tr_flags = 0; |
| 50 | #endif |
| 51 | |
| 52 | static const trace_opt w_opts[] = { |
| 53 | #ifndef NTRACE |
| 54 | { 't', AF_TRACE, "trace messages" }, |
| 55 | #endif |
| 56 | { 'n', AF_NOTE, "asynchronous notifications" }, |
| 57 | { 'w', AF_WARN, "warnings" }, |
| 58 | { 'A', AF_ALLMSGS, "all of the above" }, |
| 59 | { 0, 0, 0 } |
| 60 | }; |
| 61 | |
| 62 | /*----- Static variables --------------------------------------------------*/ |
| 63 | |
| 64 | static admin *admins; |
| 65 | static admin *a_dead; |
| 66 | static sel_file sock; |
| 67 | static const char *sockname; |
| 68 | static sym_table a_svcs; |
| 69 | static unsigned flags = 0; |
| 70 | static admin *a_stdin = 0; |
| 71 | static sig s_term, s_int, s_hup; |
| 72 | |
| 73 | #define F_DAEMON 1u |
| 74 | #define F_INIT 2u |
| 75 | #define F_FOREGROUND 4u |
| 76 | |
| 77 | #define T_RESOLVE SEC(30) |
| 78 | #define T_PING SEC(5) |
| 79 | |
| 80 | static void a_destroy(admin */*a*/); |
| 81 | |
| 82 | #define BOOL(x) ((x) ? "t" : "nil") |
| 83 | |
| 84 | /*----- Output functions --------------------------------------------------*/ |
| 85 | |
| 86 | /* --- @trywrite@ --- * |
| 87 | * |
| 88 | * Arguments: @admin *a@ = pointer to an admin block |
| 89 | * @const char *p@ = pointer to buffer to write |
| 90 | * @size_t sz@ = size of data to write |
| 91 | * |
| 92 | * Returns: The number of bytes written, or less than zero on error. |
| 93 | * |
| 94 | * Use: Attempts to write data to a client. |
| 95 | */ |
| 96 | |
| 97 | static ssize_t trywrite(admin *a, const char *p, size_t sz) |
| 98 | { |
| 99 | ssize_t n, done = 0; |
| 100 | |
| 101 | again: |
| 102 | if (!sz) |
| 103 | return (done); |
| 104 | n = write(a->w.fd, p, sz); |
| 105 | if (n > 0) { |
| 106 | done += n; |
| 107 | p += n; |
| 108 | sz -= n; |
| 109 | goto again; |
| 110 | } |
| 111 | if (n < 0) { |
| 112 | if (errno == EINTR) |
| 113 | goto again; |
| 114 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
| 115 | a_destroy(a); |
| 116 | a_warn("ADMIN", "client-write-error", "?ERRNO", A_END); |
| 117 | return (-1); |
| 118 | } |
| 119 | } |
| 120 | return (done); |
| 121 | } |
| 122 | |
| 123 | /* --- @doqueue@ -- * |
| 124 | * |
| 125 | * Arguments: @oqueue *q@ = pointer to output queue |
| 126 | * @const char *p@ = pointer to buffer to write |
| 127 | * @size_t sz@ = size of buffer |
| 128 | * |
| 129 | * Returns: Nonzero if the queue was previously empty. |
| 130 | * |
| 131 | * Use: Queues data to be written later. |
| 132 | */ |
| 133 | |
| 134 | static int doqueue(oqueue *q, const char *p, size_t sz) |
| 135 | { |
| 136 | obuf *o; |
| 137 | int rc = 0; |
| 138 | size_t n; |
| 139 | |
| 140 | o = q->tl; |
| 141 | if (!o) |
| 142 | rc = 1; |
| 143 | else if (o->p_in < o->buf + OBUFSZ) |
| 144 | goto noalloc; |
| 145 | |
| 146 | do { |
| 147 | o = xmalloc(sizeof(obuf)); |
| 148 | o->next = 0; |
| 149 | o->p_in = o->p_out = o->buf; |
| 150 | if (q->tl) |
| 151 | q->tl->next = o; |
| 152 | else |
| 153 | q->hd = o; |
| 154 | q->tl = o; |
| 155 | |
| 156 | noalloc: |
| 157 | n = o->buf + OBUFSZ - o->p_in; |
| 158 | if (n > sz) |
| 159 | n = sz; |
| 160 | memcpy(o->p_in, p, n); |
| 161 | o->p_in += n; |
| 162 | p += n; |
| 163 | sz -= n; |
| 164 | } while (sz); |
| 165 | |
| 166 | return (rc); |
| 167 | } |
| 168 | |
| 169 | /* --- @dosend@ --- * |
| 170 | * |
| 171 | * Arguemnts: @admin *a@ = pointer to an admin block |
| 172 | * @const char *p@ = pointer to buffer to write |
| 173 | * @size_t sz@ = size of data to write |
| 174 | * |
| 175 | * Returns: --- |
| 176 | * |
| 177 | * Use: Sends data to an admin client. |
| 178 | */ |
| 179 | |
| 180 | static void dosend(admin *a, const char *p, size_t sz) |
| 181 | { |
| 182 | ssize_t n; |
| 183 | |
| 184 | if (a->f & AF_DEAD) |
| 185 | return; |
| 186 | if (!a->out.hd) { |
| 187 | if ((n = trywrite(a, p, sz)) < 0) |
| 188 | return; |
| 189 | p += n; |
| 190 | sz -= n; |
| 191 | if (!sz) |
| 192 | return; |
| 193 | } |
| 194 | if (doqueue(&a->out, p, sz)) |
| 195 | sel_addfile(&a->w); |
| 196 | } |
| 197 | |
| 198 | /* --- @a_flush@ --- * |
| 199 | * |
| 200 | * Arguments: @int fd@ = file descriptor |
| 201 | * @unsigned mode@ = what's happening |
| 202 | * @void *v@ = pointer to my admin block |
| 203 | * |
| 204 | * Returns: --- |
| 205 | * |
| 206 | * Use: Flushes buffers when a client is ready to read again. |
| 207 | */ |
| 208 | |
| 209 | static void a_flush(int fd, unsigned mode, void *v) |
| 210 | { |
| 211 | admin *a = v; |
| 212 | obuf *o, *oo; |
| 213 | ssize_t n; |
| 214 | |
| 215 | o = a->out.hd; |
| 216 | while (o) { |
| 217 | if ((n = trywrite(a, o->p_out, o->p_in - o->p_out)) < 0) |
| 218 | return; |
| 219 | o->p_out += n; |
| 220 | if (o->p_in < o->p_out) |
| 221 | break; |
| 222 | oo = o; |
| 223 | o = o->next; |
| 224 | xfree(oo); |
| 225 | } |
| 226 | a->out.hd = o; |
| 227 | if (!o) { |
| 228 | a->out.tl = 0; |
| 229 | sel_rmfile(&a->w); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | /*----- Utility functions -------------------------------------------------*/ |
| 234 | |
| 235 | /* --- @a_vformat@ --- * |
| 236 | * |
| 237 | * Arguments: @dstr *d@ = where to leave the formatted message |
| 238 | * @const char *fmt@ = pointer to format string |
| 239 | * @va_list *ap@ = arguments in list |
| 240 | * |
| 241 | * Returns: --- |
| 242 | * |
| 243 | * Use: Main message token formatting driver. The arguments are |
| 244 | * interleaved formatting tokens and their parameters, finally |
| 245 | * terminated by an entry @A_END@. |
| 246 | * |
| 247 | * Tokens recognized: |
| 248 | * |
| 249 | * * "*..." ... -- pretokenized @dstr_putf@-like string |
| 250 | * |
| 251 | * * "?ADDR" SOCKADDR -- a socket address, to be converted |
| 252 | * |
| 253 | * * "?B64" BUFFER SIZE -- binary data to be base64-encoded |
| 254 | * |
| 255 | * * "?TOKENS" VECTOR -- null-terminated vector of tokens |
| 256 | * |
| 257 | * * "?PEER" PEER -- peer's name |
| 258 | * |
| 259 | * * "?ERRNO" ERRNO -- system error code |
| 260 | * |
| 261 | * * "[!]..." ... -- @dstr_putf@-like string as single token |
| 262 | */ |
| 263 | |
| 264 | void a_vformat(dstr *d, const char *fmt, va_list *ap) |
| 265 | { |
| 266 | dstr dd = DSTR_INIT; |
| 267 | |
| 268 | while (fmt) { |
| 269 | if (*fmt == '*') { |
| 270 | if (d->len) dstr_putc(d, ' '); |
| 271 | dstr_vputf(d, fmt + 1, ap); |
| 272 | } else if (*fmt == '?') { |
| 273 | if (strcmp(fmt, "?ADDR") == 0) { |
| 274 | const addr *a = va_arg(*ap, const addr *); |
| 275 | switch (a->sa.sa_family) { |
| 276 | case AF_INET: |
| 277 | u_quotify(d, "INET"); |
| 278 | u_quotify(d, inet_ntoa(a->sin.sin_addr)); |
| 279 | dstr_putf(d, " %u", (unsigned)ntohs(a->sin.sin_port)); |
| 280 | break; |
| 281 | default: |
| 282 | abort(); |
| 283 | } |
| 284 | } else if (strcmp(fmt, "?B64") == 0) { |
| 285 | const octet *p = va_arg(*ap, const octet *); |
| 286 | size_t n = va_arg(*ap, size_t); |
| 287 | codec *b64 = base64_class.encoder(CDCF_NOEQPAD, "", 0); |
| 288 | dstr_putc(d, ' '); |
| 289 | b64->ops->code(b64, p, n, d); |
| 290 | b64->ops->code(b64, 0, 0, d); |
| 291 | b64->ops->destroy(b64); |
| 292 | } else if (strcmp(fmt, "?TOKENS") == 0) { |
| 293 | const char *const *av = va_arg(*ap, const char *const *); |
| 294 | while (*av) u_quotify(d, *av++); |
| 295 | } else if (strcmp(fmt, "?PEER") == 0) |
| 296 | u_quotify(d, p_name(va_arg(*ap, peer *))); |
| 297 | else if (strcmp(fmt, "?ERRNO") == 0) { |
| 298 | dstr_putf(d, " E%d", errno); |
| 299 | u_quotify(d, strerror(errno)); |
| 300 | } else |
| 301 | abort(); |
| 302 | } else { |
| 303 | if (*fmt == '!') fmt++; |
| 304 | DRESET(&dd); |
| 305 | dstr_vputf(&dd, fmt, ap); |
| 306 | u_quotify(d, dd.buf); |
| 307 | } |
| 308 | fmt = va_arg(*ap, const char *); |
| 309 | } |
| 310 | dstr_putz(d); |
| 311 | |
| 312 | dstr_destroy(&dd); |
| 313 | } |
| 314 | |
| 315 | /* --- @a_format@ --- * |
| 316 | * |
| 317 | * Arguments: @dstr *d@ = where to leave the formatted message |
| 318 | * @const char *fmt@ = pointer to format string |
| 319 | * |
| 320 | * Returns: --- |
| 321 | * |
| 322 | * Use: Writes a tokenized message into a string, for later |
| 323 | * presentation. |
| 324 | */ |
| 325 | |
| 326 | void a_format(dstr *d, const char *fmt, ...) |
| 327 | { |
| 328 | va_list ap; |
| 329 | |
| 330 | va_start(ap, fmt); |
| 331 | a_vformat(d, fmt, &ap); |
| 332 | va_end(ap); |
| 333 | } |
| 334 | |
| 335 | /* --- @a_write@, @a_vwrite@ --- * |
| 336 | * |
| 337 | * Arguments: @admin *a@ = admin connection to write to |
| 338 | * @const char *status@ = status code to report |
| 339 | * @const char *tag@ = tag string, or null |
| 340 | * @const char *fmt@ = pointer to format string |
| 341 | * @va_list *ap@ = arguments in list |
| 342 | * @...@ = other arguments |
| 343 | * |
| 344 | * Returns: --- |
| 345 | * |
| 346 | * Use: Sends a message to an admin connection. |
| 347 | */ |
| 348 | |
| 349 | static void a_vwrite(admin *a, const char *status, const char *tag, |
| 350 | const char *fmt, va_list *ap) |
| 351 | { |
| 352 | dstr d = DSTR_INIT; |
| 353 | |
| 354 | if (tag) dstr_puts(&d, "BG"); |
| 355 | dstr_puts(&d, status); |
| 356 | if (tag) u_quotify(&d, tag); |
| 357 | a_vformat(&d, fmt, ap); |
| 358 | dstr_putc(&d, '\n'); |
| 359 | dosend(a, d.buf, d.len); |
| 360 | dstr_destroy(&d); |
| 361 | } |
| 362 | |
| 363 | static void a_write(admin *a, const char *status, const char *tag, |
| 364 | const char *fmt, ...) |
| 365 | { |
| 366 | va_list ap; |
| 367 | |
| 368 | va_start(ap, fmt); |
| 369 | a_vwrite(a, status, tag, fmt, &ap); |
| 370 | va_end(ap); |
| 371 | } |
| 372 | |
| 373 | /* --- @a_ok@, @a_fail@ --- * |
| 374 | * |
| 375 | * Arguments: @admin *a@ = connection |
| 376 | * @const char *fmt@ = format string |
| 377 | * @...@ = other arguments |
| 378 | * |
| 379 | * Returns: --- |
| 380 | * |
| 381 | * Use: Convenience functions for @a_write@. |
| 382 | */ |
| 383 | |
| 384 | static void a_ok(admin *a) { a_write(a, "OK", 0, A_END); } |
| 385 | |
| 386 | static void a_fail(admin *a, const char *fmt, ...) |
| 387 | { |
| 388 | va_list ap; |
| 389 | |
| 390 | va_start(ap, fmt); |
| 391 | a_vwrite(a, "FAIL", 0, fmt, &ap); |
| 392 | va_end(ap); |
| 393 | } |
| 394 | |
| 395 | /* --- @a_info@ --- * |
| 396 | * |
| 397 | * Arguments: @admin *a@ = connection |
| 398 | * @const char *fmt@ = format string |
| 399 | * @...@ = other arguments |
| 400 | * |
| 401 | * Returns: --- |
| 402 | * |
| 403 | * Use: Report information to an admin client. |
| 404 | */ |
| 405 | |
| 406 | void a_info(admin *a, const char *fmt, ...) |
| 407 | { |
| 408 | va_list ap; |
| 409 | |
| 410 | va_start(ap, fmt); |
| 411 | a_vwrite(a, "INFO", 0, fmt, &ap); |
| 412 | va_end(ap); |
| 413 | } |
| 414 | |
| 415 | /* --- @a_alert@, @a_valert@, @a_rawalert@ --- * |
| 416 | * |
| 417 | * Arguments: @unsigned f_and, f_eq@ = filter for connections |
| 418 | * @const char *status@ = status string |
| 419 | * @const char *fmt@ = pointer to format string |
| 420 | * @const char *p@ = pointer to raw string |
| 421 | * @size_t sz@ = size of raw string |
| 422 | * @va_list *ap@ = arguments in list |
| 423 | * @...@ = other arguments |
| 424 | * |
| 425 | * Returns: --- |
| 426 | * |
| 427 | * Use: Write a message to all admin connections matched by the given |
| 428 | * filter. |
| 429 | */ |
| 430 | |
| 431 | static void a_rawalert(unsigned f_and, unsigned f_eq, const char *status, |
| 432 | const char *p, size_t sz) |
| 433 | { |
| 434 | admin *a, *aa; |
| 435 | dstr d = DSTR_INIT; |
| 436 | |
| 437 | if (!(flags & F_INIT)) |
| 438 | return; |
| 439 | dstr_puts(&d, status); |
| 440 | if (p) { |
| 441 | dstr_putc(&d, ' '); |
| 442 | dstr_putm(&d, p, sz); |
| 443 | } |
| 444 | dstr_putc(&d, '\n'); |
| 445 | p = d.buf; |
| 446 | sz = d.len; |
| 447 | for (a = admins; a; a = aa) { |
| 448 | aa = a->next; |
| 449 | if ((a->f & f_and) == f_eq) |
| 450 | dosend(a, d.buf, d.len); |
| 451 | } |
| 452 | dstr_destroy(&d); |
| 453 | } |
| 454 | |
| 455 | static void a_valert(unsigned f_and, unsigned f_eq, const char *status, |
| 456 | const char *fmt, va_list *ap) |
| 457 | { |
| 458 | dstr d = DSTR_INIT; |
| 459 | |
| 460 | if (!(flags & F_INIT)) |
| 461 | return; |
| 462 | a_vformat(&d, fmt, ap); |
| 463 | a_rawalert(f_and, f_eq, status, fmt ? d.buf : 0, fmt ? d.len : 0); |
| 464 | dstr_destroy(&d); |
| 465 | } |
| 466 | |
| 467 | static void a_alert(unsigned f_and, unsigned f_eq, const char *status, |
| 468 | const char *fmt, ...) |
| 469 | { |
| 470 | va_list ap; |
| 471 | |
| 472 | va_start(ap, fmt); |
| 473 | a_valert(f_and, f_eq, status, fmt, &ap); |
| 474 | va_end(ap); |
| 475 | } |
| 476 | |
| 477 | /* --- @a_warn@ --- * |
| 478 | * |
| 479 | * Arguments: @const char *fmt@ = pointer to format string |
| 480 | * @...@ = other arguments |
| 481 | * |
| 482 | * Returns: --- |
| 483 | * |
| 484 | * Use: Informs all admin connections of a warning. |
| 485 | */ |
| 486 | |
| 487 | void a_warn(const char *fmt, ...) |
| 488 | { |
| 489 | va_list ap; |
| 490 | |
| 491 | va_start(ap, fmt); |
| 492 | if (flags & F_INIT) |
| 493 | a_valert(0, 0, "WARN", fmt, &ap); |
| 494 | else { |
| 495 | dstr d = DSTR_INIT; |
| 496 | fprintf(stderr, "%s: ", QUIS); |
| 497 | a_vformat(&d, fmt, &ap); |
| 498 | dstr_putc(&d, '\n'); |
| 499 | dstr_write(&d, stderr); |
| 500 | dstr_destroy(&d); |
| 501 | } |
| 502 | va_end(ap); |
| 503 | } |
| 504 | |
| 505 | /* --- @a_trace@ --- * |
| 506 | * |
| 507 | * Arguments: @const char *p@ = pointer to a buffer |
| 508 | * @size_t sz@ = size of the buffer |
| 509 | * @void *v@ = uninteresting pointer |
| 510 | * |
| 511 | * Returns: --- |
| 512 | * |
| 513 | * Use: Custom trace output handler. Sends trace messages to |
| 514 | * interested admin connections. |
| 515 | */ |
| 516 | |
| 517 | #ifndef NTRACE |
| 518 | static void a_trace(const char *p, size_t sz, void *v) |
| 519 | { a_rawalert(AF_TRACE, AF_TRACE, "TRACE", p, sz); } |
| 520 | #endif |
| 521 | |
| 522 | /* --- @a_notify@ --- * |
| 523 | * |
| 524 | * Arguments: @const char *fmt@ = pointer to format string |
| 525 | * @...@ = other arguments |
| 526 | * |
| 527 | * Returns: --- |
| 528 | * |
| 529 | * Use: Sends a notification to interested admin connections. |
| 530 | */ |
| 531 | |
| 532 | void a_notify(const char *fmt, ...) |
| 533 | { |
| 534 | va_list ap; |
| 535 | |
| 536 | va_start(ap, fmt); |
| 537 | a_valert(AF_NOTE, AF_NOTE, "NOTE", fmt, &ap); |
| 538 | va_end(ap); |
| 539 | } |
| 540 | |
| 541 | /* --- @a_quit@ --- * |
| 542 | * |
| 543 | * Arguments: --- |
| 544 | * |
| 545 | * Returns: --- |
| 546 | * |
| 547 | * Use: Shuts things down nicely. |
| 548 | */ |
| 549 | |
| 550 | void a_quit(void) |
| 551 | { |
| 552 | close(sock.fd); |
| 553 | unlink(sockname); |
| 554 | FOREACH_PEER(p, { p_destroy(p); }); |
| 555 | ps_quit(); |
| 556 | exit(0); |
| 557 | } |
| 558 | |
| 559 | /* --- @a_sigdie@ --- * |
| 560 | * |
| 561 | * Arguments: @int sig@ = signal number |
| 562 | * @void *v@ = an uninteresting argument |
| 563 | * |
| 564 | * Returns: --- |
| 565 | * |
| 566 | * Use Shuts down on receipt of a fatal signal. |
| 567 | */ |
| 568 | |
| 569 | static void a_sigdie(int sig, void *v) |
| 570 | { |
| 571 | char *p; |
| 572 | char buf[20]; |
| 573 | |
| 574 | switch (sig) { |
| 575 | case SIGTERM: p = "SIGTERM"; break; |
| 576 | case SIGINT: p = "SIGINT"; break; |
| 577 | default: |
| 578 | sprintf(buf, "%i", sig); |
| 579 | p = buf; |
| 580 | break; |
| 581 | } |
| 582 | a_warn("SERVER", "quit", "signal", "%s", p, A_END); |
| 583 | a_quit(); |
| 584 | } |
| 585 | |
| 586 | /* --- @a_sighup@ --- * |
| 587 | * |
| 588 | * Arguments: @int sig@ = signal number |
| 589 | * @void *v@ = an uninteresting argument |
| 590 | * |
| 591 | * Returns: --- |
| 592 | * |
| 593 | * Use Logs a message about SIGHUP not being useful. |
| 594 | */ |
| 595 | |
| 596 | static void a_sighup(int sig, void *v) |
| 597 | { a_warn("SERVER", "ignore", "signal", "SIGHUP", A_END); } |
| 598 | |
| 599 | /* --- @a_parsetime@ --- * |
| 600 | * |
| 601 | * Arguments; @const char *p@ = time string to parse |
| 602 | * |
| 603 | * Returns: Time in seconds, or @< 0@ on error. |
| 604 | */ |
| 605 | |
| 606 | static long a_parsetime(const char *p) |
| 607 | { |
| 608 | char *q; |
| 609 | long t = strtol(p, &q, 0); |
| 610 | |
| 611 | switch (*q) { |
| 612 | case 'd': t *= 24; |
| 613 | case 'h': t *= 60; |
| 614 | case 'm': t *= 60; |
| 615 | case 's': if (q[1] != 0) |
| 616 | default: t = -1; |
| 617 | case 0: break; |
| 618 | } |
| 619 | return (t); |
| 620 | } |
| 621 | |
| 622 | /* --- @a_findpeer@ --- * |
| 623 | * |
| 624 | * Arguments: @admin *a@ = admin connection |
| 625 | * @const char *pn@ = peer name |
| 626 | * |
| 627 | * Returns: The peer, or null if not there. |
| 628 | * |
| 629 | * Use: Finds a peer, reporting an error if it failed. |
| 630 | */ |
| 631 | |
| 632 | static peer *a_findpeer(admin *a, const char *pn) |
| 633 | { |
| 634 | peer *p; |
| 635 | |
| 636 | if ((p = p_find(pn)) == 0) |
| 637 | a_fail(a, "unknown-peer", "%s", pn, A_END); |
| 638 | return (p); |
| 639 | } |
| 640 | |
| 641 | /*----- Backgrounded operations -------------------------------------------*/ |
| 642 | |
| 643 | #define BGTAG(bg) \ |
| 644 | (((admin_bgop *)(bg))->tag ? ((admin_bgop *)(bg))->tag : "<foreground>") |
| 645 | |
| 646 | /* --- @a_bgfind@ --- * |
| 647 | * |
| 648 | * Arguments: @admin *a@ = a client block |
| 649 | * @const char *tag@ = the requested tag |
| 650 | * |
| 651 | * Returns: The requested background job, or null. |
| 652 | */ |
| 653 | |
| 654 | static admin_bgop *a_bgfind(admin *a, const char *tag) |
| 655 | { |
| 656 | admin_bgop *bg; |
| 657 | |
| 658 | for (bg = a->bg; bg; bg = bg->next) { |
| 659 | if (bg->tag && strcmp(tag, bg->tag) == 0) |
| 660 | return (bg); |
| 661 | } |
| 662 | return (0); |
| 663 | } |
| 664 | |
| 665 | /* --- @a_bgrelease@ --- * |
| 666 | * |
| 667 | * Arguments: @admin_bgop *bg@ = backgrounded operation |
| 668 | * |
| 669 | * Returns: --- |
| 670 | * |
| 671 | * Use: Removes a backgrounded operation from the queue, since |
| 672 | * (presumably) it's done. |
| 673 | */ |
| 674 | |
| 675 | static void a_bgrelease(admin_bgop *bg) |
| 676 | { |
| 677 | admin *a = bg->a; |
| 678 | |
| 679 | T( trace(T_ADMIN, "admin: release bgop %s", BGTAG(bg)); ) |
| 680 | if (bg->tag) xfree(bg->tag); |
| 681 | else selbuf_enable(&a->b); |
| 682 | if (bg->next) bg->next->prev = bg->prev; |
| 683 | if (bg->prev) bg->prev->next = bg->next; |
| 684 | else a->bg = bg->next; |
| 685 | xfree(bg); |
| 686 | if (!a->bg && (a->f & AF_CLOSE)) a_destroy(a); |
| 687 | } |
| 688 | |
| 689 | /* --- @a_bgok@, @a_bginfo@, @a_bgfail@ --- * |
| 690 | * |
| 691 | * Arguments: @admin_bgop *bg@ = backgrounded operation |
| 692 | * @const char *fmt@ = format string |
| 693 | * @...@ = other arguments |
| 694 | * |
| 695 | * Returns: --- |
| 696 | * |
| 697 | * Use: Convenience functions for @a_write@. |
| 698 | */ |
| 699 | |
| 700 | static void a_bgok(admin_bgop *bg) |
| 701 | { a_write(bg->a, "OK", bg->tag, A_END); } |
| 702 | |
| 703 | static void a_bginfo(admin_bgop *bg, const char *fmt, ...) |
| 704 | { |
| 705 | va_list ap; |
| 706 | va_start(ap, fmt); |
| 707 | a_vwrite(bg->a, "INFO", bg->tag, fmt, &ap); |
| 708 | va_end(ap); |
| 709 | } |
| 710 | |
| 711 | static void a_bgfail(admin_bgop *bg, const char *fmt, ...) |
| 712 | { |
| 713 | va_list ap; |
| 714 | va_start(ap, fmt); |
| 715 | a_vwrite(bg->a, "FAIL", bg->tag, fmt, &ap); |
| 716 | va_end(ap); |
| 717 | } |
| 718 | |
| 719 | /* --- @a_bgadd@ --- * |
| 720 | * |
| 721 | * Arguments: @admin *a@ = administration connection |
| 722 | * @admin_bgop *bg@ = pointer to background operation |
| 723 | * @const char *tag@ = background tag, or null for foreground |
| 724 | * @void (*cancel)(admin_bgop *)@ = cancel function |
| 725 | * |
| 726 | * Returns: Zero for success, nonzero on failure. |
| 727 | * |
| 728 | * Use: Links a background job into the list. |
| 729 | */ |
| 730 | |
| 731 | static int a_bgadd(admin *a, admin_bgop *bg, const char *tag, |
| 732 | void (*cancel)(admin_bgop *)) |
| 733 | { |
| 734 | if (tag) { |
| 735 | if (a_bgfind(a, tag)) { |
| 736 | a_fail(a, "tag-exists", "%s", tag, A_END); |
| 737 | return (-1); |
| 738 | } |
| 739 | bg->tag = xstrdup(tag); |
| 740 | } |
| 741 | else { |
| 742 | bg->tag = 0; |
| 743 | selbuf_disable(&a->b); |
| 744 | } |
| 745 | bg->a = a; |
| 746 | bg->cancel = cancel; |
| 747 | bg->next = a->bg; |
| 748 | bg->prev = 0; |
| 749 | if (a->bg) a->bg->prev = bg; |
| 750 | a->bg = bg; |
| 751 | T( trace(T_ADMIN, "admin: add bgop %s", BGTAG(bg)); ) |
| 752 | if (tag) a_write(a, "DETACH", tag, A_END); |
| 753 | return (0); |
| 754 | } |
| 755 | |
| 756 | /*----- Job table manipulation --------------------------------------------*/ |
| 757 | |
| 758 | #define JOB_SHIFT 16 |
| 759 | #define JOB_INDEXMASK ((1ul << JOB_SHIFT) - 1) |
| 760 | #define JOB_SEQMASK ((1ul << (32 - JOB_SHIFT)) - 1) |
| 761 | |
| 762 | #define JOB_END 0xfffffffful |
| 763 | |
| 764 | static unsigned long a_joboffset; |
| 765 | |
| 766 | /* --- @a_jobidencode@ --- * |
| 767 | * |
| 768 | * Arguments: @admin_svcop *svc@ = pointer to a service operation |
| 769 | * |
| 770 | * Returns: A jobid for this job, in an internal static buffer. |
| 771 | * |
| 772 | * Use: Constructs a jobid. In order to dissuade people from |
| 773 | * predicting jobids, we obfuscate them. |
| 774 | * |
| 775 | * A `raw' jobid consists of two 16-bit fields. The low 16 bits |
| 776 | * are an index into a big array. The high 16 bits are a |
| 777 | * sequence number recording how many times that slot has been |
| 778 | * reused. |
| 779 | * |
| 780 | * This `raw' jobid is then obfuscated by adding a randomly- |
| 781 | * generated offset, and multiplying (mod %$2^{32}$%) by a fixed |
| 782 | * odd constant. |
| 783 | */ |
| 784 | |
| 785 | static const char *a_jobidencode(admin_svcop *svc) |
| 786 | { |
| 787 | admin_jobtable *j = &svc->prov->j; |
| 788 | static char buf[10]; |
| 789 | unsigned long pre; |
| 790 | unsigned seq; |
| 791 | |
| 792 | assert(svc->index <= JOB_INDEXMASK); |
| 793 | seq = j->v[svc->index].seq; |
| 794 | assert(seq <= JOB_SEQMASK); |
| 795 | pre = (unsigned long)svc->index | ((unsigned long)seq << JOB_SHIFT); |
| 796 | sprintf(buf, "J%08lx", ((pre + a_joboffset) * 0x0f87a7a3ul) & 0xffffffff); |
| 797 | return (buf); |
| 798 | } |
| 799 | |
| 800 | /* --- @a_jobiddecode@ --- * |
| 801 | * |
| 802 | * Arguments: @admin_jobtable *j@ = pointer to a job table |
| 803 | * @const char *jid@ = pointer to a jobid string |
| 804 | * |
| 805 | * Returns: A pointer to the job's @svcop@ structure. |
| 806 | */ |
| 807 | |
| 808 | static admin_svcop *a_jobiddecode(admin_jobtable *j, const char *jid) |
| 809 | { |
| 810 | unsigned i; |
| 811 | unsigned long pre; |
| 812 | |
| 813 | if (jid[0] != 'J') |
| 814 | return (0); |
| 815 | for (i = 1; i < 9; i++) { |
| 816 | if (!isxdigit((unsigned char)jid[i])) |
| 817 | return (0); |
| 818 | } |
| 819 | if (jid[9] != 0) |
| 820 | return (0); |
| 821 | pre = strtoul(jid + 1, 0, 16); |
| 822 | pre = ((pre * 0xbd11c40bul) - a_joboffset) & 0xffffffff; |
| 823 | i = pre & JOB_INDEXMASK; |
| 824 | if (i >= j->n || j->v[i].seq != (pre >> JOB_SHIFT)) |
| 825 | return (0); |
| 826 | return (j->v[i].u.op); |
| 827 | } |
| 828 | |
| 829 | /* --- @a_jobcreate@ --- * |
| 830 | * |
| 831 | * Arguments: @admin *a@ = pointer to administration client |
| 832 | * |
| 833 | * Returns: A pointer to a freshly-allocated @svcop@, or null. |
| 834 | * |
| 835 | * Use: Allocates a fresh @svcop@ and links it into a job table. |
| 836 | */ |
| 837 | |
| 838 | static admin_svcop *a_jobcreate(admin *a) |
| 839 | { |
| 840 | admin_svcop *svc; |
| 841 | unsigned i; |
| 842 | unsigned sz; |
| 843 | admin_jobtable *j = &a->j; |
| 844 | |
| 845 | if (j->free != JOB_END) { |
| 846 | i = j->free; |
| 847 | j->free = j->v[i].u.next; |
| 848 | } else { |
| 849 | if (j->n == j->sz) { |
| 850 | if (j->sz > JOB_INDEXMASK) |
| 851 | return (0); |
| 852 | sz = j->sz; |
| 853 | if (!sz) { |
| 854 | j->sz = 16; |
| 855 | j->v = xmalloc(j->sz * sizeof(*j->v)); |
| 856 | } else { |
| 857 | j->sz = sz << 1; |
| 858 | j->v = xrealloc(j->v, j->sz * sizeof(*j->v), sz * sizeof(*j->v)); |
| 859 | } |
| 860 | } |
| 861 | i = j->n++; |
| 862 | j->v[i].seq = 0; |
| 863 | } |
| 864 | svc = xmalloc(sizeof(*svc)); |
| 865 | svc->index = i; |
| 866 | svc->prov = a; |
| 867 | svc->next = j->active; |
| 868 | svc->prev = 0; |
| 869 | if (j->active) j->active->prev = svc; |
| 870 | j->active = svc; |
| 871 | j->v[i].u.op = svc; |
| 872 | IF_TRACING(T_ADMIN, { |
| 873 | trace(T_ADMIN, "admin: created job %s (%u)", a_jobidencode(svc), i); |
| 874 | }) |
| 875 | return (svc); |
| 876 | } |
| 877 | |
| 878 | /* --- @a_jobdestroy@ --- * |
| 879 | * |
| 880 | * Arguments: @admin_svcop *svc@ = pointer to job block |
| 881 | * |
| 882 | * Returns: --- |
| 883 | * |
| 884 | * Use: Frees up a completed (or cancelled) job. |
| 885 | */ |
| 886 | |
| 887 | static void a_jobdestroy(admin_svcop *svc) |
| 888 | { |
| 889 | admin *a = svc->prov; |
| 890 | admin_jobtable *j = &a->j; |
| 891 | unsigned i = svc->index; |
| 892 | |
| 893 | IF_TRACING(T_ADMIN, { |
| 894 | trace(T_ADMIN, "admin: destroying job %s (%u)", a_jobidencode(svc), i); |
| 895 | }) |
| 896 | assert(j->v[i].u.op = svc); |
| 897 | j->v[i].u.next = j->free; |
| 898 | j->v[i].seq++; |
| 899 | j->free = i; |
| 900 | if (svc->next) svc->next->prev = svc->prev; |
| 901 | if (svc->prev) svc->prev->next = svc->next; |
| 902 | else j->active = svc->next; |
| 903 | } |
| 904 | |
| 905 | /* --- @a_jobtableinit@ --- * |
| 906 | * |
| 907 | * Arguments: @admin_jobtable *j@ = pointer to job table |
| 908 | * |
| 909 | * Returns: --- |
| 910 | * |
| 911 | * Use: Initializes a job table. |
| 912 | */ |
| 913 | |
| 914 | static void a_jobtableinit(admin_jobtable *j) |
| 915 | { |
| 916 | if (!a_joboffset) |
| 917 | a_joboffset = GR_RANGE(&rand_global, 0xffffffff) + 1; |
| 918 | j->n = j->sz = 0; |
| 919 | j->active = 0; |
| 920 | j->free = JOB_END; |
| 921 | j->v = 0; |
| 922 | } |
| 923 | |
| 924 | /* --- @a_jobtablefinal@ --- * |
| 925 | * |
| 926 | * Arguments: @admin_jobtable *j@ = pointer to job table |
| 927 | * |
| 928 | * Returns: --- |
| 929 | * |
| 930 | * Use: Closes down a job table. |
| 931 | */ |
| 932 | |
| 933 | static void a_jobtablefinal(admin_jobtable *j) |
| 934 | { |
| 935 | admin_svcop *svc, *ssvc; |
| 936 | |
| 937 | for (svc = j->active; svc; svc = ssvc) { |
| 938 | ssvc = svc->next; |
| 939 | a_bgfail(&svc->bg, "provider-failed", A_END); |
| 940 | a_bgrelease(&svc->bg); |
| 941 | } |
| 942 | if (j->v) xfree(j->v); |
| 943 | } |
| 944 | |
| 945 | /*----- Services infrastructure -------------------------------------------*/ |
| 946 | |
| 947 | /* --- @a_svcfind@ --- * |
| 948 | * |
| 949 | * Arguments: @admin *a@ = the requesting client |
| 950 | * @const char *name@ = service name wanted |
| 951 | * |
| 952 | * Returns: The service requested, or null. |
| 953 | * |
| 954 | * Use: Finds a service; reports an error if the service couldn't be |
| 955 | * found. |
| 956 | */ |
| 957 | |
| 958 | static admin_service *a_svcfind(admin *a, const char *name) |
| 959 | { |
| 960 | admin_service *svc; |
| 961 | |
| 962 | if ((svc = sym_find(&a_svcs, name, -1, 0, 0)) == 0) { |
| 963 | a_fail(a, "unknown-service", "%s", name, A_END); |
| 964 | return (0); |
| 965 | } |
| 966 | return (svc); |
| 967 | } |
| 968 | |
| 969 | /* --- @a_svcunlink@ --- * |
| 970 | * |
| 971 | * Arguments: @admin_service *svc@ = pointer to service structure |
| 972 | * |
| 973 | * Returns: --- |
| 974 | * |
| 975 | * Use: Unlinks the service from its provider, without issuing a |
| 976 | * message or freeing the structure. The version string is |
| 977 | * freed, however. |
| 978 | */ |
| 979 | |
| 980 | static void a_svcunlink(admin_service *svc) |
| 981 | { |
| 982 | if (svc->next) |
| 983 | svc->next->prev = svc->prev; |
| 984 | if (svc->prev) |
| 985 | svc->prev->next = svc->next; |
| 986 | else |
| 987 | svc->prov->svcs = svc->next; |
| 988 | xfree(svc->version); |
| 989 | } |
| 990 | |
| 991 | /* --- @a_svcrelease@ --- * |
| 992 | * |
| 993 | * Arguments: @admin_service *svc@ = pointer to service structure |
| 994 | * |
| 995 | * Returns: --- |
| 996 | * |
| 997 | * Use: Releases a service and frees its structure. |
| 998 | */ |
| 999 | |
| 1000 | static void a_svcrelease(admin_service *svc) |
| 1001 | { |
| 1002 | a_notify("SVCRELEASE", "%s", SYM_NAME(svc), A_END); |
| 1003 | a_svcunlink(svc); |
| 1004 | sym_remove(&a_svcs, svc); |
| 1005 | } |
| 1006 | |
| 1007 | /*----- Name resolution operations ----------------------------------------*/ |
| 1008 | |
| 1009 | /* --- @a_resolved@ --- * |
| 1010 | * |
| 1011 | * Arguments: @struct hostent *h@ = pointer to resolved hostname |
| 1012 | * @void *v@ = pointer to resolver operation |
| 1013 | * |
| 1014 | * Returns: --- |
| 1015 | * |
| 1016 | * Use: Handles a completed name resolution. |
| 1017 | */ |
| 1018 | |
| 1019 | static void a_resolved(struct hostent *h, void *v) |
| 1020 | { |
| 1021 | admin_resop *r = v; |
| 1022 | |
| 1023 | T( trace(T_ADMIN, "admin: resop %s resolved", BGTAG(r)); ) |
| 1024 | QUICKRAND; |
| 1025 | if (!h) { |
| 1026 | a_bgfail(&r->bg, "resolve-error", "%s", r->addr, A_END); |
| 1027 | r->func(r, ARES_FAIL); |
| 1028 | } else { |
| 1029 | memcpy(&r->sa.sin.sin_addr, h->h_addr, sizeof(struct in_addr)); |
| 1030 | r->func(r, ARES_OK); |
| 1031 | } |
| 1032 | sel_rmtimer(&r->t); |
| 1033 | xfree(r->addr); |
| 1034 | a_bgrelease(&r->bg); |
| 1035 | } |
| 1036 | |
| 1037 | /* --- @a_restimer@ --- * |
| 1038 | * |
| 1039 | * Arguments: @struct timeval *tv@ = timer |
| 1040 | * @void *v@ = pointer to resolver operation |
| 1041 | * |
| 1042 | * Returns: --- |
| 1043 | * |
| 1044 | * Use: Times out a resolver. |
| 1045 | */ |
| 1046 | |
| 1047 | static void a_restimer(struct timeval *tv, void *v) |
| 1048 | { |
| 1049 | admin_resop *r = v; |
| 1050 | |
| 1051 | T( trace(T_ADMIN, "admin: resop %s timeout", BGTAG(r)); ) |
| 1052 | a_bgfail(&r->bg, "resolver-timeout", "%s", r->addr, A_END); |
| 1053 | r->func(r, ARES_FAIL); |
| 1054 | bres_abort(&r->r); |
| 1055 | xfree(r->addr); |
| 1056 | a_bgrelease(&r->bg); |
| 1057 | } |
| 1058 | |
| 1059 | /* --- @a_rescancel@ --- * |
| 1060 | * |
| 1061 | * Arguments: @admin_bgop *bg@ = background operation |
| 1062 | * |
| 1063 | * Returns: --- |
| 1064 | * |
| 1065 | * Use: Cancels an add operation. |
| 1066 | */ |
| 1067 | |
| 1068 | static void a_rescancel(admin_bgop *bg) |
| 1069 | { |
| 1070 | admin_resop *r = (admin_resop *)bg; |
| 1071 | |
| 1072 | T( trace(T_ADMIN, "admin: cancel resop %s", BGTAG(r)); ) |
| 1073 | r->func(r, ARES_FAIL); |
| 1074 | sel_rmtimer(&r->t); |
| 1075 | xfree(r->addr); |
| 1076 | bres_abort(&r->r); |
| 1077 | } |
| 1078 | |
| 1079 | /* --- @a_resolve@ --- * |
| 1080 | * |
| 1081 | * Arguments: @admin *a@ = administration connection |
| 1082 | * @admin_resop *r@ = resolver operation to run |
| 1083 | * @const char *tag@ = background operation tag |
| 1084 | * @void (*func)(struct admin_resop *, int@ = handler function |
| 1085 | * @unsigned ac@ = number of remaining arguments |
| 1086 | * @char *av[]@ = pointer to remaining arguments |
| 1087 | * |
| 1088 | * Returns: --- |
| 1089 | * |
| 1090 | * Use: Cranks up a resolver job. |
| 1091 | */ |
| 1092 | |
| 1093 | static void a_resolve(admin *a, admin_resop *r, const char *tag, |
| 1094 | void (*func)(struct admin_resop *, int), |
| 1095 | unsigned ac, char *av[]) |
| 1096 | { |
| 1097 | struct timeval tv; |
| 1098 | unsigned long pt; |
| 1099 | char *p; |
| 1100 | int i = 0; |
| 1101 | |
| 1102 | /* --- Fill in the easy bits of address --- */ |
| 1103 | |
| 1104 | r->bg.tag = "<starting>"; |
| 1105 | r->addr = 0; |
| 1106 | r->func = func; |
| 1107 | if (mystrieq(av[i], "inet")) i++; |
| 1108 | if (ac - i != 1 && ac - i != 2) { |
| 1109 | a_fail(a, "bad-addr-syntax", "[inet] ADDRESS [PORT]", A_END); |
| 1110 | goto fail; |
| 1111 | } |
| 1112 | r->sa.sin.sin_family = AF_INET; |
| 1113 | r->addr = xstrdup(av[i]); |
| 1114 | if (!av[i + 1]) |
| 1115 | pt = TRIPE_PORT; |
| 1116 | else { |
| 1117 | pt = strtoul(av[i + 1], &p, 0); |
| 1118 | if (*p) { |
| 1119 | struct servent *s = getservbyname(av[i + 1], "udp"); |
| 1120 | if (!s) { |
| 1121 | a_fail(a, "unknown-service", "%s", av[i + 1], A_END); |
| 1122 | goto fail; |
| 1123 | } |
| 1124 | pt = ntohs(s->s_port); |
| 1125 | } |
| 1126 | } |
| 1127 | if (pt == 0 || pt >= 65536) { |
| 1128 | a_fail(a, "invalid-port", "%lu", pt, A_END); |
| 1129 | goto fail; |
| 1130 | } |
| 1131 | r->sa.sin.sin_port = htons(pt); |
| 1132 | |
| 1133 | /* --- Report backgrounding --- * |
| 1134 | * |
| 1135 | * Do this for consistency of interface, even if we're going to get the |
| 1136 | * answer straight away. |
| 1137 | */ |
| 1138 | |
| 1139 | if (a_bgadd(a, &r->bg, tag, a_rescancel)) |
| 1140 | goto fail; |
| 1141 | T( trace(T_ADMIN, "admin: %u, resop %s, hostname `%s'", |
| 1142 | a->seq, BGTAG(r), r->addr); ) |
| 1143 | |
| 1144 | /* --- If the name is numeric, do it the easy way --- */ |
| 1145 | |
| 1146 | if (inet_aton(av[i], &r->sa.sin.sin_addr)) { |
| 1147 | T( trace(T_ADMIN, "admin: resop %s done the easy way", BGTAG(r)); ) |
| 1148 | func(r, ARES_OK); |
| 1149 | xfree(r->addr); |
| 1150 | a_bgrelease(&r->bg); |
| 1151 | return; |
| 1152 | } |
| 1153 | |
| 1154 | /* --- Store everything for later and crank up the resolver --- */ |
| 1155 | |
| 1156 | gettimeofday(&tv, 0); |
| 1157 | tv.tv_sec += T_RESOLVE; |
| 1158 | sel_addtimer(&sel, &r->t, &tv, a_restimer, r); |
| 1159 | bres_byname(&r->r, r->addr, a_resolved, r); |
| 1160 | return; |
| 1161 | |
| 1162 | fail: |
| 1163 | func(r, ARES_FAIL); |
| 1164 | if (r->addr) xfree(r->addr); |
| 1165 | xfree(r); |
| 1166 | } |
| 1167 | |
| 1168 | /*----- Option parsing ----------------------------------------------------*/ |
| 1169 | |
| 1170 | #define OPTIONS(argc, argv, guts) do { \ |
| 1171 | char **o_av = argv; \ |
| 1172 | for (;; o_av++) { \ |
| 1173 | if (!*o_av) \ |
| 1174 | break; \ |
| 1175 | if (mystrieq(*o_av, "--")) { \ |
| 1176 | o_av++; \ |
| 1177 | break; \ |
| 1178 | } \ |
| 1179 | guts \ |
| 1180 | if (**o_av == '-') \ |
| 1181 | goto bad_syntax; \ |
| 1182 | break; \ |
| 1183 | } \ |
| 1184 | argc -= o_av - argv; \ |
| 1185 | argv = o_av; \ |
| 1186 | } while (0) |
| 1187 | |
| 1188 | #define OPT(name, guts) if (mystrieq(*o_av, name)) { guts continue; } |
| 1189 | |
| 1190 | #define OPTARG(name, arg, guts) OPT(name, { \ |
| 1191 | const char *arg; \ |
| 1192 | arg = *++o_av; \ |
| 1193 | if (!arg) goto bad_syntax; \ |
| 1194 | guts \ |
| 1195 | }) |
| 1196 | |
| 1197 | #define OPTTIME(name, arg, guts) OPTARG(name, o_arg, { \ |
| 1198 | long arg; \ |
| 1199 | if ((arg = a_parsetime(o_arg)) < 0) { \ |
| 1200 | a_fail(a, "bad-time-spec", "%s", o_arg, A_END); \ |
| 1201 | goto fail; \ |
| 1202 | } \ |
| 1203 | guts \ |
| 1204 | }) |
| 1205 | |
| 1206 | /*----- Adding peers ------------------------------------------------------*/ |
| 1207 | |
| 1208 | /* --- @a_doadd@ --- * |
| 1209 | * |
| 1210 | * Arguments: @admin_resop *r@ = resolver operation |
| 1211 | * @int rc@ = how it worked |
| 1212 | * |
| 1213 | * Returns: --- |
| 1214 | * |
| 1215 | * Use: Handles a completed resolution. |
| 1216 | */ |
| 1217 | |
| 1218 | static void a_doadd(admin_resop *r, int rc) |
| 1219 | { |
| 1220 | admin_addop *add = (admin_addop *)r; |
| 1221 | |
| 1222 | T( trace(T_ADMIN, "admin: done add op %s", BGTAG(add)); ) |
| 1223 | |
| 1224 | if (rc == ARES_OK) { |
| 1225 | add->peer.sa = add->r.sa; |
| 1226 | if (p_findbyaddr(&add->r.sa)) |
| 1227 | a_bgfail(&add->r.bg, "peer-addr-exists", "?ADDR", &add->r.sa, A_END); |
| 1228 | else if (p_find(add->peer.name)) |
| 1229 | a_bgfail(&add->r.bg, "peer-exists", "%s", add->peer.name, A_END); |
| 1230 | else if (!p_create(&add->peer)) |
| 1231 | a_bgfail(&add->r.bg, "peer-create-fail", "%s", add->peer.name, A_END); |
| 1232 | else |
| 1233 | a_bgok(&add->r.bg); |
| 1234 | } |
| 1235 | |
| 1236 | if (add->peer.tag) xfree(add->peer.tag); |
| 1237 | if (add->peer.privtag) xfree(add->peer.privtag); |
| 1238 | xfree(add->peer.name); |
| 1239 | } |
| 1240 | |
| 1241 | /* --- @acmd_add@ --- * |
| 1242 | * |
| 1243 | * Arguments: @admin *a@ = connection which requested the addition |
| 1244 | * @unsigned ac@ = argument count |
| 1245 | * @char *av[]@ = pointer to the argument list |
| 1246 | * |
| 1247 | * Returns: --- |
| 1248 | * |
| 1249 | * Use: Adds a new peer. |
| 1250 | */ |
| 1251 | |
| 1252 | static void acmd_add(admin *a, unsigned ac, char *av[]) |
| 1253 | { |
| 1254 | const char *tag = 0; |
| 1255 | admin_addop *add; |
| 1256 | |
| 1257 | /* --- Set stuff up --- */ |
| 1258 | |
| 1259 | add = xmalloc(sizeof(*add)); |
| 1260 | add->peer.name = 0; |
| 1261 | add->peer.tag = 0; |
| 1262 | add->peer.privtag = 0; |
| 1263 | add->peer.t_ka = 0; |
| 1264 | add->peer.tops = tun_default; |
| 1265 | add->peer.f = 0; |
| 1266 | |
| 1267 | /* --- Parse options --- */ |
| 1268 | |
| 1269 | OPTIONS(ac, av, { |
| 1270 | OPTARG("-background", arg, { tag = arg; }) |
| 1271 | OPTARG("-tunnel", arg, { |
| 1272 | unsigned i; |
| 1273 | for (i = 0;; i++) { |
| 1274 | if (!tunnels[i]) { |
| 1275 | a_fail(a, "unknown-tunnel", "%s", arg, A_END); |
| 1276 | goto fail; |
| 1277 | } |
| 1278 | if (mystrieq(arg, tunnels[i]->name)) { |
| 1279 | add->peer.tops = tunnels[i]; |
| 1280 | break; |
| 1281 | } |
| 1282 | } |
| 1283 | }) |
| 1284 | OPTTIME("-keepalive", t, { add->peer.t_ka = t; }) |
| 1285 | OPT("-cork", { add->peer.f |= KXF_CORK; }) |
| 1286 | OPTARG("-key", arg, { |
| 1287 | if (add->peer.tag) xfree(add->peer.tag); |
| 1288 | add->peer.tag = xstrdup(arg); |
| 1289 | }) |
| 1290 | OPT("-mobile", { add->peer.f |= PSF_MOBILE; }) |
| 1291 | OPTARG("-priv", arg, { |
| 1292 | if (add->peer.privtag) xfree(add->peer.privtag); |
| 1293 | add->peer.privtag = xstrdup(arg); |
| 1294 | }) |
| 1295 | }); |
| 1296 | |
| 1297 | /* --- Make sure someone's not got there already --- */ |
| 1298 | |
| 1299 | if (!av[0] || !av[1]) |
| 1300 | goto bad_syntax; |
| 1301 | if (p_find(*av)) { |
| 1302 | a_fail(a, "peer-exists", "%s", *av, A_END); |
| 1303 | goto fail; |
| 1304 | } |
| 1305 | add->peer.name = xstrdup(*av++); |
| 1306 | ac--; |
| 1307 | |
| 1308 | /* --- Crank up the resolver --- */ |
| 1309 | |
| 1310 | a_resolve(a, &add->r, tag, a_doadd, ac, av); |
| 1311 | return; |
| 1312 | |
| 1313 | /* --- Clearing up --- */ |
| 1314 | |
| 1315 | bad_syntax: |
| 1316 | a_fail(a, "bad-syntax", "add", "[OPTIONS] PEER ADDR ...", A_END); |
| 1317 | fail: |
| 1318 | if (add->peer.name) xfree(add->peer.name); |
| 1319 | if (add->peer.tag) xfree(add->peer.tag); |
| 1320 | if (add->peer.privtag) xfree(add->peer.privtag); |
| 1321 | xfree(add); |
| 1322 | return; |
| 1323 | } |
| 1324 | |
| 1325 | /*----- Ping --------------------------------------------------------------*/ |
| 1326 | |
| 1327 | /* --- @a_pingcancel@ --- * |
| 1328 | * |
| 1329 | * Arguments: @admin_bgop *bg@ = background operation block |
| 1330 | * |
| 1331 | * Returns: --- |
| 1332 | * |
| 1333 | * Use: Cancels a running ping. |
| 1334 | */ |
| 1335 | |
| 1336 | static void a_pingcancel(admin_bgop *bg) |
| 1337 | { |
| 1338 | admin_pingop *pg = (admin_pingop *)bg; |
| 1339 | T( trace(T_ADMIN, "admin: cancel ping op %s", BGTAG(pg)); ) |
| 1340 | p_pingdone(&pg->ping, PING_NONOTIFY); |
| 1341 | } |
| 1342 | |
| 1343 | /* --- @a_pong@ --- * |
| 1344 | * |
| 1345 | * Arguments: @int rc@ = return code |
| 1346 | * @void *v@ = ping operation block |
| 1347 | * |
| 1348 | * Returns: --- |
| 1349 | * |
| 1350 | * Use: Collects what happened to a ping message. |
| 1351 | */ |
| 1352 | |
| 1353 | static void a_pong(int rc, void *v) |
| 1354 | { |
| 1355 | admin_pingop *pg = v; |
| 1356 | struct timeval tv; |
| 1357 | double millis; |
| 1358 | |
| 1359 | switch (rc) { |
| 1360 | case PING_OK: |
| 1361 | gettimeofday(&tv, 0); |
| 1362 | tv_sub(&tv, &tv, &pg->pingtime); |
| 1363 | millis = (double)tv.tv_sec * 1000 + (double)tv.tv_usec/1000; |
| 1364 | a_bginfo(&pg->bg, "ping-ok", "%.1f", millis, A_END); |
| 1365 | a_bgok(&pg->bg); |
| 1366 | break; |
| 1367 | case PING_TIMEOUT: |
| 1368 | a_bginfo(&pg->bg, "ping-timeout", A_END); |
| 1369 | a_bgok(&pg->bg); |
| 1370 | break; |
| 1371 | case PING_PEERDIED: |
| 1372 | a_bginfo(&pg->bg, "ping-peer-died", A_END); |
| 1373 | a_bgok(&pg->bg); |
| 1374 | break; |
| 1375 | default: |
| 1376 | abort(); |
| 1377 | } |
| 1378 | T( trace(T_ADMIN, "admin: ponged ping op %s", BGTAG(pg)); ) |
| 1379 | a_bgrelease(&pg->bg); |
| 1380 | } |
| 1381 | |
| 1382 | /* --- @acmd_ping@, @acmd_eping@ --- * |
| 1383 | * |
| 1384 | * Arguments: @admin *a@ = connection which requested the ping |
| 1385 | * @unsigned ac@ = argument count |
| 1386 | * @char *av[]@ = pointer to the argument list |
| 1387 | * |
| 1388 | * Returns: --- |
| 1389 | * |
| 1390 | * Use: Pings a peer. |
| 1391 | */ |
| 1392 | |
| 1393 | static void a_ping(admin *a, unsigned ac, char *av[], |
| 1394 | const char *cmd, unsigned msg) |
| 1395 | { |
| 1396 | long t = T_PING; |
| 1397 | peer *p; |
| 1398 | admin_pingop *pg = 0; |
| 1399 | const char *tag = 0; |
| 1400 | |
| 1401 | OPTIONS(ac, av, { |
| 1402 | OPTARG("-background", arg, { tag = arg; }) |
| 1403 | OPTTIME("-timeout", arg, { t = arg; }) |
| 1404 | }); |
| 1405 | if (!*av || av[1]) goto bad_syntax; |
| 1406 | if ((p = a_findpeer(a, *av)) == 0) |
| 1407 | return; |
| 1408 | pg = xmalloc(sizeof(*pg)); |
| 1409 | gettimeofday(&pg->pingtime, 0); |
| 1410 | if (a_bgadd(a, &pg->bg, tag, a_pingcancel)) |
| 1411 | goto fail; |
| 1412 | T( trace(T_ADMIN, "admin: ping op %s: %s to %s", |
| 1413 | BGTAG(pg), cmd, p_name(p)); ) |
| 1414 | if (p_pingsend(p, &pg->ping, msg, t, a_pong, pg)) { |
| 1415 | a_bgfail(&pg->bg, "ping-send-failed", A_END); |
| 1416 | a_bgrelease(&pg->bg); |
| 1417 | } |
| 1418 | return; |
| 1419 | |
| 1420 | bad_syntax: |
| 1421 | a_fail(a, "bad-syntax", "%s", cmd, "[OPTIONS] PEER", cmd, A_END); |
| 1422 | fail: |
| 1423 | if (pg) xfree(pg); |
| 1424 | return; |
| 1425 | } |
| 1426 | |
| 1427 | static void acmd_ping(admin *a, unsigned ac, char *av[]) |
| 1428 | { a_ping(a, ac, av, "ping", MISC_PING); } |
| 1429 | static void acmd_eping(admin *a, unsigned ac, char *av[]) |
| 1430 | { a_ping(a, ac, av, "eping", MISC_EPING); } |
| 1431 | |
| 1432 | /*----- Service commands --------------------------------------------------*/ |
| 1433 | |
| 1434 | static void acmd_svcclaim(admin *a, unsigned ac, char *av[]) |
| 1435 | { |
| 1436 | admin_service *svc; |
| 1437 | unsigned f; |
| 1438 | |
| 1439 | svc = sym_find(&a_svcs, av[0], -1, sizeof(*svc), &f); |
| 1440 | if (f) { |
| 1441 | if (versioncmp(av[1], svc->version) <= 0) { |
| 1442 | a_fail(a, |
| 1443 | "service-exists", |
| 1444 | "%s", SYM_NAME(svc), |
| 1445 | "%s", svc->version, |
| 1446 | A_END); |
| 1447 | return; |
| 1448 | } |
| 1449 | a_write(svc->prov, "SVCCLAIM", 0, "%s", av[0], "%s", av[1], A_END); |
| 1450 | a_svcunlink(svc); |
| 1451 | } |
| 1452 | svc->prov = a; |
| 1453 | svc->version = xstrdup(av[1]); |
| 1454 | svc->next = a->svcs; |
| 1455 | svc->prev = 0; |
| 1456 | if (a->svcs) a->svcs->prev = svc; |
| 1457 | a->svcs = svc; |
| 1458 | a_notify("SVCCLAIM", "%s", SYM_NAME(svc), "%s", svc->version, A_END); |
| 1459 | a_ok(a); |
| 1460 | } |
| 1461 | |
| 1462 | static void acmd_svcrelease(admin *a, unsigned ac, char *av[]) |
| 1463 | { |
| 1464 | admin_service *svc; |
| 1465 | |
| 1466 | if ((svc = a_svcfind(a, av[0])) == 0) |
| 1467 | return; |
| 1468 | if (svc->prov != a) { |
| 1469 | a_fail(a, "not-service-provider", "%s", SYM_NAME(svc), A_END); |
| 1470 | return; |
| 1471 | } |
| 1472 | a_svcrelease(svc); |
| 1473 | a_ok(a); |
| 1474 | } |
| 1475 | |
| 1476 | static void acmd_svcensure(admin *a, unsigned ac, char *av[]) |
| 1477 | { |
| 1478 | admin_service *svc; |
| 1479 | |
| 1480 | if ((svc = a_svcfind(a, av[0])) == 0) |
| 1481 | return; |
| 1482 | if (av[1] && versioncmp(svc->version, av[1]) < 0) { |
| 1483 | a_fail(a, "service-too-old", |
| 1484 | "%s", SYM_NAME(svc), |
| 1485 | "%s", svc->version, |
| 1486 | A_END); |
| 1487 | return; |
| 1488 | } |
| 1489 | a_ok(a); |
| 1490 | } |
| 1491 | |
| 1492 | static void acmd_svcquery(admin *a, unsigned ac, char *av[]) |
| 1493 | { |
| 1494 | admin_service *svc; |
| 1495 | |
| 1496 | if ((svc = a_svcfind(a, av[0])) != 0) { |
| 1497 | a_info(a, "name=%s", SYM_NAME(svc), "version=%s", svc->version, A_END); |
| 1498 | a_ok(a); |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | static void acmd_svclist(admin *a, unsigned ac, char *av[]) |
| 1503 | { |
| 1504 | admin_service *svc; |
| 1505 | sym_iter i; |
| 1506 | |
| 1507 | for (sym_mkiter(&i, &a_svcs); (svc = sym_next(&i)) != 0; ) |
| 1508 | a_info(a, "%s", SYM_NAME(svc), "%s", svc->version, A_END); |
| 1509 | a_ok(a); |
| 1510 | } |
| 1511 | |
| 1512 | static void a_canceljob(admin_bgop *bg) |
| 1513 | { |
| 1514 | admin_svcop *svc = (admin_svcop *)bg; |
| 1515 | |
| 1516 | a_write(svc->prov, "SVCCANCEL", 0, "%s", a_jobidencode(svc), A_END); |
| 1517 | a_jobdestroy(svc); |
| 1518 | } |
| 1519 | |
| 1520 | static void acmd_svcsubmit(admin *a, unsigned ac, char *av[]) |
| 1521 | { |
| 1522 | const char *tag = 0; |
| 1523 | admin_service *svc; |
| 1524 | admin_svcop *svcop; |
| 1525 | const char *ver = 0; |
| 1526 | dstr d = DSTR_INIT; |
| 1527 | |
| 1528 | OPTIONS(ac, av, { |
| 1529 | OPTARG("-background", arg, { tag = arg; }) |
| 1530 | OPTARG("-version", arg, { ver = arg; }) |
| 1531 | }); |
| 1532 | if (!*av) goto bad_syntax; |
| 1533 | if ((svc = a_svcfind(a, *av)) == 0) goto fail; |
| 1534 | if (ver && versioncmp(svc->version, ver) < 0) { |
| 1535 | a_fail(a, "service-too-old", |
| 1536 | "%s", SYM_NAME(svc), |
| 1537 | "%s", svc->version, |
| 1538 | A_END); |
| 1539 | goto fail; |
| 1540 | } |
| 1541 | if ((svcop = a_jobcreate(svc->prov)) == 0) { |
| 1542 | a_fail(a, "provider-overloaded", A_END); |
| 1543 | goto fail; |
| 1544 | } |
| 1545 | if (a_bgadd(a, &svcop->bg, tag, a_canceljob)) { |
| 1546 | a_jobdestroy(svcop); |
| 1547 | goto fail; |
| 1548 | } |
| 1549 | a_write(svc->prov, "SVCJOB", 0, |
| 1550 | "%s", a_jobidencode(svcop), |
| 1551 | "?TOKENS", av, |
| 1552 | A_END); |
| 1553 | goto done; |
| 1554 | |
| 1555 | bad_syntax: |
| 1556 | a_fail(a, "bad-syntax", "svcsubmit", "[OPTIONS] SERVICE ARGS...", A_END); |
| 1557 | fail: |
| 1558 | done: |
| 1559 | dstr_destroy(&d); |
| 1560 | return; |
| 1561 | } |
| 1562 | |
| 1563 | static void a_replycmd(admin *a, const char *status, int donep, char *av[]) |
| 1564 | { |
| 1565 | admin_svcop *svc; |
| 1566 | |
| 1567 | if ((svc = a_jobiddecode(&a->j, av[0])) == 0) { |
| 1568 | a_fail(a, "unknown-jobid", av[0], A_END); |
| 1569 | return; |
| 1570 | } |
| 1571 | a_write(svc->bg.a, status, svc->bg.tag, "?TOKENS", av + 1, A_END); |
| 1572 | if (donep) { |
| 1573 | a_jobdestroy(svc); |
| 1574 | a_bgrelease(&svc->bg); |
| 1575 | } |
| 1576 | a_ok(a); |
| 1577 | } |
| 1578 | |
| 1579 | static void acmd_svcok(admin *a, unsigned ac, char *av[]) |
| 1580 | { a_replycmd(a, "OK", 1, av); } |
| 1581 | static void acmd_svcinfo(admin *a, unsigned ac, char *av[]) |
| 1582 | { a_replycmd(a, "INFO", 0, av); } |
| 1583 | static void acmd_svcfail(admin *a, unsigned ac, char *av[]) |
| 1584 | { a_replycmd(a, "FAIL", 1, av); } |
| 1585 | |
| 1586 | /*----- Administration commands -------------------------------------------*/ |
| 1587 | |
| 1588 | /* --- Miscellaneous commands --- */ |
| 1589 | |
| 1590 | /* --- @traceish@ --- * |
| 1591 | * |
| 1592 | * Arguments: @admin *a@ = connection to complain on |
| 1593 | * @unsigned ac@ = number of arguments |
| 1594 | * @char *av[]@ = vector of arguments |
| 1595 | * @const char *what@ = what we're messing with |
| 1596 | * @const trace_opt *tt@ = options table |
| 1597 | * @unsigned *ff@ = where the flags are |
| 1598 | * |
| 1599 | * Returns: Nonzero if anything changed. |
| 1600 | * |
| 1601 | * Use: Guts of trace-ish commands like `trace' and `watch'. |
| 1602 | */ |
| 1603 | |
| 1604 | static int traceish(admin *a, unsigned ac, char *av[], |
| 1605 | const char *what, const trace_opt *tt, unsigned *ff) |
| 1606 | { |
| 1607 | int ch = 0; |
| 1608 | |
| 1609 | if (!ac || strcmp(av[0], "?") == 0) { |
| 1610 | const trace_opt *t; |
| 1611 | for (t = tt; t->ch; t++) { |
| 1612 | a_info(a, "*%c%c %s", |
| 1613 | t->ch, (*ff & t->f) == t->f ? '+' : ' ', t->help, A_END); |
| 1614 | } |
| 1615 | } else { |
| 1616 | unsigned sense = 1; |
| 1617 | unsigned f = *ff; |
| 1618 | const trace_opt *t; |
| 1619 | char *p = av[0]; |
| 1620 | |
| 1621 | while (*p) { |
| 1622 | switch (*p) { |
| 1623 | case '+': sense = 1; break; |
| 1624 | case '-': sense = 0; break; |
| 1625 | default: |
| 1626 | for (t = tt; t->ch; t++) { |
| 1627 | if (t->ch == *p) { |
| 1628 | if (sense) f |= t->f; |
| 1629 | else f &= ~t->f; |
| 1630 | goto tropt_ok; |
| 1631 | } |
| 1632 | } |
| 1633 | a_fail(a, "bad-%s-option", what, "%c", *p, A_END); |
| 1634 | return (0); |
| 1635 | tropt_ok:; |
| 1636 | break; |
| 1637 | } |
| 1638 | p++; |
| 1639 | } |
| 1640 | *ff = f; |
| 1641 | ch = 1; |
| 1642 | } |
| 1643 | a_ok(a); |
| 1644 | return (ch); |
| 1645 | } |
| 1646 | |
| 1647 | #ifndef NTRACE |
| 1648 | |
| 1649 | static void acmd_trace(admin *a, unsigned ac, char *av[]) |
| 1650 | { |
| 1651 | if (traceish(a, ac, av, "trace", tr_opts, &tr_flags)) |
| 1652 | trace_level(tr_flags); |
| 1653 | } |
| 1654 | |
| 1655 | #endif |
| 1656 | |
| 1657 | static void acmd_watch(admin *a, unsigned ac, char *av[]) |
| 1658 | { traceish(a, ac, av, "watch", w_opts, &a->f); } |
| 1659 | |
| 1660 | static void alertcmd(admin *a, unsigned f_and, unsigned f_eq, |
| 1661 | const char *status, char *av[]) |
| 1662 | { a_alert(f_and, f_eq, status, "USER", "?TOKENS", av, A_END); a_ok(a); } |
| 1663 | static void acmd_notify(admin *a, unsigned ac, char *av[]) |
| 1664 | { alertcmd(a, AF_NOTE, AF_NOTE, "NOTE", av); } |
| 1665 | static void acmd_warn(admin *a, unsigned ac, char *av[]) |
| 1666 | { alertcmd(a, AF_WARN, AF_WARN, "WARN", av); } |
| 1667 | |
| 1668 | static void acmd_port(admin *a, unsigned ac, char *av[]) |
| 1669 | { a_info(a, "%u", p_port(), A_END); a_ok(a); } |
| 1670 | |
| 1671 | static void acmd_daemon(admin *a, unsigned ac, char *av[]) |
| 1672 | { |
| 1673 | if (flags & F_DAEMON) |
| 1674 | a_fail(a, "already-daemon", A_END); |
| 1675 | else { |
| 1676 | a_notify("DAEMON", A_END); |
| 1677 | if (a_stdin) |
| 1678 | a_destroy(a_stdin); |
| 1679 | if (daemonize()) |
| 1680 | a_fail(a, "daemon-error", "?ERRNO", A_END); |
| 1681 | else { |
| 1682 | flags |= F_DAEMON; |
| 1683 | a_ok(a); |
| 1684 | } |
| 1685 | } |
| 1686 | } |
| 1687 | |
| 1688 | static void acmd_jobs(admin *a, unsigned ac, char *av[]) |
| 1689 | { |
| 1690 | admin_bgop *bg; |
| 1691 | |
| 1692 | for (bg = a->bg; bg; bg = bg->next) { |
| 1693 | assert(bg->tag); |
| 1694 | a_info(a, "%s", bg->tag, A_END); |
| 1695 | } |
| 1696 | a_ok(a); |
| 1697 | } |
| 1698 | |
| 1699 | static void acmd_bgcancel(admin *a, unsigned ac, char *av[]) |
| 1700 | { |
| 1701 | admin_bgop *bg; |
| 1702 | |
| 1703 | if ((bg = a_bgfind(a, av[0])) == 0) |
| 1704 | a_fail(a, "unknown-tag", "%s", av[0], A_END); |
| 1705 | else { |
| 1706 | bg->cancel(bg); |
| 1707 | a_bgrelease(bg); |
| 1708 | a_ok(a); |
| 1709 | } |
| 1710 | } |
| 1711 | |
| 1712 | static void acmd_algs(admin *a, unsigned ac, char *av[]) |
| 1713 | { |
| 1714 | peer *p; |
| 1715 | const kdata *kd; |
| 1716 | const dhgrp *g; |
| 1717 | const algswitch *algs; |
| 1718 | |
| 1719 | if (!ac) |
| 1720 | kd = master; |
| 1721 | else { |
| 1722 | if ((p = a_findpeer(a, av[0])) == 0) return; |
| 1723 | kd = p->kx.kpriv; |
| 1724 | } |
| 1725 | g = kd->grp; |
| 1726 | algs = &kd->algs; |
| 1727 | |
| 1728 | g->ops->grpinfo(g, a); |
| 1729 | a_info(a, |
| 1730 | "hash=%s", algs->h->name, |
| 1731 | "mgf=%s", algs->mgf->name, |
| 1732 | "hash-sz=%lu", (unsigned long)algs->h->hashsz, |
| 1733 | A_END); |
| 1734 | a_info(a, |
| 1735 | "bulk-transform=%s", algs->bulk->ops->name, |
| 1736 | "bulk-overhead=%lu", |
| 1737 | (unsigned long)algs->bulk->ops->overhead(algs->bulk), |
| 1738 | A_END); |
| 1739 | algs->bulk->ops->alginfo(algs->bulk, a); |
| 1740 | a_info(a, |
| 1741 | "cipher-data-limit=%lu", |
| 1742 | (unsigned long)algs->bulk->ops->expsz(algs->bulk), |
| 1743 | A_END); |
| 1744 | a_ok(a); |
| 1745 | } |
| 1746 | |
| 1747 | static void acmd_list(admin *a, unsigned ac, char *av[]) |
| 1748 | { |
| 1749 | FOREACH_PEER(p, { a_info(a, "%s", p_name(p), A_END); }); |
| 1750 | a_ok(a); |
| 1751 | } |
| 1752 | |
| 1753 | static void acmd_ifname(admin *a, unsigned ac, char *av[]) |
| 1754 | { |
| 1755 | peer *p; |
| 1756 | |
| 1757 | if ((p = a_findpeer(a, av[0])) != 0) { |
| 1758 | a_info(a, "%s", p_ifname(p), A_END); |
| 1759 | a_ok(a); |
| 1760 | } |
| 1761 | } |
| 1762 | |
| 1763 | static void acmd_setifname(admin *a, unsigned ac, char *av[]) |
| 1764 | { |
| 1765 | peer *p; |
| 1766 | |
| 1767 | if ((p = a_findpeer(a, av[0])) != 0) { |
| 1768 | a_notify("NEWIFNAME", "?PEER", p, "%s", p_ifname(p), "%s", av[1], A_END); |
| 1769 | p_setifname(p, av[1]); |
| 1770 | a_ok(a); |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | static void acmd_getchal(admin *a, unsigned ac, char *av[]) |
| 1775 | { |
| 1776 | buf b; |
| 1777 | |
| 1778 | buf_init(&b, buf_i, PKBUFSZ); |
| 1779 | c_new(0, 0, &b); |
| 1780 | a_info(a, "?B64", BBASE(&b), (size_t)BLEN(&b), A_END); |
| 1781 | a_ok(a); |
| 1782 | } |
| 1783 | |
| 1784 | static void acmd_checkchal(admin *a, unsigned ac, char *av[]) |
| 1785 | { |
| 1786 | codec *b64 = base64_class.decoder(CDCF_NOEQPAD); |
| 1787 | int err; |
| 1788 | buf b; |
| 1789 | dstr d = DSTR_INIT; |
| 1790 | |
| 1791 | if ((err = b64->ops->code(b64, av[0], strlen(av[0]), &d)) != 0 || |
| 1792 | (err = b64->ops->code(b64, 0, 0, &d)) != 0) |
| 1793 | a_fail(a, "bad-base64", "%s", codec_strerror(err), A_END); |
| 1794 | else { |
| 1795 | buf_init(&b, d.buf, d.len); |
| 1796 | if (c_check(0, 0, &b) || BBAD(&b) || BLEFT(&b)) |
| 1797 | a_fail(a, "invalid-challenge", A_END); |
| 1798 | else |
| 1799 | a_ok(a); |
| 1800 | } |
| 1801 | b64->ops->destroy(b64); |
| 1802 | dstr_destroy(&d); |
| 1803 | } |
| 1804 | |
| 1805 | static void acmd_greet(admin *a, unsigned ac, char *av[]) |
| 1806 | { |
| 1807 | peer *p; |
| 1808 | int err; |
| 1809 | codec *b64; |
| 1810 | dstr d = DSTR_INIT; |
| 1811 | |
| 1812 | if ((p = a_findpeer(a, av[0])) == 0) return; |
| 1813 | b64 = base64_class.decoder(CDCF_NOEQPAD); |
| 1814 | if ((err = b64->ops->code(b64, av[1], strlen(av[1]), &d)) != 0 || |
| 1815 | (err = b64->ops->code(b64, 0, 0, &d)) != 0) |
| 1816 | a_fail(a, "bad-base64", "%s", codec_strerror(err), A_END); |
| 1817 | else { |
| 1818 | p_greet(p, d.buf, d.len); |
| 1819 | a_ok(a); |
| 1820 | } |
| 1821 | b64->ops->destroy(b64); |
| 1822 | dstr_destroy(&d); |
| 1823 | } |
| 1824 | |
| 1825 | static void acmd_addr(admin *a, unsigned ac, char *av[]) |
| 1826 | { |
| 1827 | peer *p; |
| 1828 | const addr *ad; |
| 1829 | |
| 1830 | if ((p = a_findpeer(a, av[0])) != 0) { |
| 1831 | ad = p_addr(p); |
| 1832 | assert(ad->sa.sa_family == AF_INET); |
| 1833 | a_info(a, "?ADDR", ad, A_END); |
| 1834 | a_ok(a); |
| 1835 | } |
| 1836 | } |
| 1837 | |
| 1838 | static void acmd_peerinfo(admin *a, unsigned ac, char *av[]) |
| 1839 | { |
| 1840 | peer *p; |
| 1841 | const peerspec *ps; |
| 1842 | const char *ptag; |
| 1843 | |
| 1844 | if ((p = a_findpeer(a, av[0])) != 0) { |
| 1845 | ps = p_spec(p); |
| 1846 | a_info(a, "tunnel=%s", ps->tops->name, A_END); |
| 1847 | a_info(a, "key=%s", p_tag(p), |
| 1848 | "current-key=%s", p->kx.kpub->tag, A_END); |
| 1849 | if ((ptag = p_privtag(p)) == 0) ptag = "(default)"; |
| 1850 | a_info(a, "private-key=%s", ptag, |
| 1851 | "current-private-key=%s", p->kx.kpriv->tag, A_END); |
| 1852 | a_info(a, "keepalive=%lu", ps->t_ka, A_END); |
| 1853 | a_info(a, "corked=%s", BOOL(p->kx.f&KXF_CORK), |
| 1854 | "mobile=%s", BOOL(ps->f&PSF_MOBILE), |
| 1855 | A_END); |
| 1856 | a_ok(a); |
| 1857 | } |
| 1858 | } |
| 1859 | |
| 1860 | static void acmd_servinfo(admin *a, unsigned ac, char *av[]) |
| 1861 | { |
| 1862 | a_info(a, "implementation=edgeware-tripe", A_END); |
| 1863 | a_info(a, "version=%s", VERSION, A_END); |
| 1864 | a_info(a, "daemon=%s", BOOL(flags & F_DAEMON), A_END); |
| 1865 | a_ok(a); |
| 1866 | } |
| 1867 | |
| 1868 | static void acmd_stats(admin *a, unsigned ac, char *av[]) |
| 1869 | { |
| 1870 | peer *p; |
| 1871 | stats *st; |
| 1872 | |
| 1873 | if ((p = a_findpeer(a, av[0])) == 0) |
| 1874 | return; |
| 1875 | |
| 1876 | st = p_stats(p); |
| 1877 | a_info(a, "start-time=%s", timestr(st->t_start), A_END); |
| 1878 | a_info(a, "last-packet-time=%s", timestr(st->t_last), A_END); |
| 1879 | a_info(a, "last-keyexch-time=%s", timestr(st->t_kx), A_END); |
| 1880 | a_info(a, "packets-in=%lu", st->n_in, "bytes-in=%lu", st->sz_in, A_END); |
| 1881 | a_info(a, |
| 1882 | "packets-out=%lu", st->n_out, |
| 1883 | "bytes-out=%lu", st->sz_out, |
| 1884 | A_END); |
| 1885 | a_info(a, |
| 1886 | "keyexch-packets-in=%lu", st->n_kxin, |
| 1887 | "keyexch-bytes-in=%lu", st->sz_kxin, |
| 1888 | A_END); |
| 1889 | a_info(a, |
| 1890 | "keyexch-packets-out=%lu", st->n_kxout, |
| 1891 | "keyexch-bytes-out=%lu", st->sz_kxout, |
| 1892 | A_END); |
| 1893 | a_info(a, |
| 1894 | "ip-packets-in=%lu", st->n_ipin, |
| 1895 | "ip-bytes-in=%lu", st->sz_ipin, |
| 1896 | A_END); |
| 1897 | a_info(a, |
| 1898 | "ip-packets-out=%lu", st->n_ipout, |
| 1899 | "ip-bytes-out=%lu", st->sz_ipout, |
| 1900 | A_END); |
| 1901 | a_info(a, "rejected-packets=%lu", st->n_reject, A_END); |
| 1902 | a_ok(a); |
| 1903 | } |
| 1904 | |
| 1905 | static void acmd_kill(admin *a, unsigned ac, char *av[]) |
| 1906 | { |
| 1907 | peer *p; |
| 1908 | |
| 1909 | if ((p = a_findpeer(a, av[0])) != 0) { |
| 1910 | p_destroy(p); |
| 1911 | a_ok(a); |
| 1912 | } |
| 1913 | } |
| 1914 | |
| 1915 | static void acmd_forcekx(admin *a, unsigned ac, char *av[]) |
| 1916 | { |
| 1917 | peer *p; |
| 1918 | |
| 1919 | if ((p = a_findpeer(a, av[0])) != 0) { |
| 1920 | kx_start(&p->kx, 1); |
| 1921 | a_ok(a); |
| 1922 | } |
| 1923 | } |
| 1924 | |
| 1925 | static void acmd_reload(admin *a, unsigned ac, char *av[]) |
| 1926 | { p_keyreload(); a_ok(a); } |
| 1927 | |
| 1928 | static void acmd_quit(admin *a, unsigned ac, char *av[]) |
| 1929 | { |
| 1930 | a_warn("SERVER", "quit", "admin-request", A_END); |
| 1931 | a_ok(a); |
| 1932 | a_quit(); |
| 1933 | } |
| 1934 | |
| 1935 | static void acmd_version(admin *a, unsigned ac, char *av[]) |
| 1936 | { |
| 1937 | a_info(a, "%s", PACKAGE, "%s", VERSION, A_END); |
| 1938 | a_ok(a); |
| 1939 | } |
| 1940 | |
| 1941 | static void acmd_tunnels(admin *a, unsigned ac, char *av[]) |
| 1942 | { |
| 1943 | int i; |
| 1944 | |
| 1945 | for (i = 0; tunnels[i]; i++) |
| 1946 | a_info(a, "%s", tunnels[i]->name, A_END); |
| 1947 | a_ok(a); |
| 1948 | } |
| 1949 | |
| 1950 | /* --- The command table and help --- */ |
| 1951 | |
| 1952 | typedef struct acmd { |
| 1953 | const char *name; |
| 1954 | const char *help; |
| 1955 | unsigned argmin, argmax; |
| 1956 | void (*func)(admin */*a*/, unsigned /*ac*/, char */*av*/[]); |
| 1957 | } acmd; |
| 1958 | |
| 1959 | static void acmd_help(admin */*a*/, unsigned /*ac*/, char */*av*/[]); |
| 1960 | |
| 1961 | static const acmd acmdtab[] = { |
| 1962 | { "add", "[OPTIONS] PEER ADDR ...", 2, 0xffff, acmd_add }, |
| 1963 | { "addr", "PEER", 1, 1, acmd_addr }, |
| 1964 | { "algs", "[PEER]", 0, 1, acmd_algs }, |
| 1965 | { "bgcancel", "TAG", 1, 1, acmd_bgcancel }, |
| 1966 | { "checkchal", "CHAL", 1, 1, acmd_checkchal }, |
| 1967 | { "daemon", 0, 0, 0, acmd_daemon }, |
| 1968 | { "eping", "[OPTIONS] PEER", 1, 0xffff, acmd_eping }, |
| 1969 | { "forcekx", "PEER", 1, 1, acmd_forcekx }, |
| 1970 | { "getchal", 0, 0, 0, acmd_getchal }, |
| 1971 | { "greet", "PEER CHAL", 2, 2, acmd_greet }, |
| 1972 | { "help", 0, 0, 0, acmd_help }, |
| 1973 | { "ifname", "PEER", 1, 1, acmd_ifname }, |
| 1974 | { "jobs", 0, 0, 0, acmd_jobs }, |
| 1975 | { "kill", "PEER", 1, 1, acmd_kill }, |
| 1976 | { "list", 0, 0, 0, acmd_list }, |
| 1977 | { "notify", "MESSAGE ...", 1, 0xffff, acmd_notify }, |
| 1978 | { "peerinfo", "PEER", 1, 1, acmd_peerinfo }, |
| 1979 | { "ping", "[OPTIONS] PEER", 1, 0xffff, acmd_ping }, |
| 1980 | { "port", 0, 0, 0, acmd_port }, |
| 1981 | { "quit", 0, 0, 0, acmd_quit }, |
| 1982 | { "reload", 0, 0, 0, acmd_reload }, |
| 1983 | { "servinfo", 0, 0, 0, acmd_servinfo }, |
| 1984 | { "setifname", "PEER NEW-NAME", 2, 2, acmd_setifname }, |
| 1985 | { "stats", "PEER", 1, 1, acmd_stats }, |
| 1986 | { "svcclaim", "SERVICE VERSION", 2, 2, acmd_svcclaim }, |
| 1987 | { "svcensure", "SERVICE [VERSION]", 1, 2, acmd_svcensure }, |
| 1988 | { "svcfail", "JOBID TOKENS...", 1, 0xffff, acmd_svcfail }, |
| 1989 | { "svcinfo", "JOBID TOKENS...", 1, 0xffff, acmd_svcinfo }, |
| 1990 | { "svclist", 0, 0, 0, acmd_svclist }, |
| 1991 | { "svcok", "JOBID", 1, 1, acmd_svcok }, |
| 1992 | { "svcquery", "SERVICE", 1, 1, acmd_svcquery }, |
| 1993 | { "svcrelease", "SERVICE", 1, 1, acmd_svcrelease }, |
| 1994 | { "svcsubmit", "[OPTIONS] SERVICE TOKENS...", |
| 1995 | 2, 0xffff, acmd_svcsubmit }, |
| 1996 | #ifndef NTRACE |
| 1997 | { "trace", "[OPTIONS]", 0, 1, acmd_trace }, |
| 1998 | #endif |
| 1999 | { "tunnels", 0, 0, 0, acmd_tunnels }, |
| 2000 | { "version", 0, 0, 0, acmd_version }, |
| 2001 | { "warn", "MESSAGE ...", 1, 0xffff, acmd_warn }, |
| 2002 | { "watch", "[OPTIONS]", 0, 1, acmd_watch }, |
| 2003 | { 0, 0, 0, 0, 0 } |
| 2004 | }; |
| 2005 | |
| 2006 | static void acmd_help(admin *a, unsigned ac, char *av[]) |
| 2007 | { |
| 2008 | const acmd *c; |
| 2009 | |
| 2010 | for (c = acmdtab; c->name; c++) { |
| 2011 | if (c->help) |
| 2012 | a_info(a, "%s", c->name, "*%s", c->help, A_END); |
| 2013 | else |
| 2014 | a_info(a, "%s", c->name, A_END); |
| 2015 | } |
| 2016 | a_ok(a); |
| 2017 | } |
| 2018 | |
| 2019 | /*----- Connection handling -----------------------------------------------*/ |
| 2020 | |
| 2021 | /* --- @a_destroypending@ --- * |
| 2022 | * |
| 2023 | * Arguments: --- |
| 2024 | * |
| 2025 | * Returns: --- |
| 2026 | * |
| 2027 | * Use: Destroys pending admin connections at a safe time. |
| 2028 | */ |
| 2029 | |
| 2030 | static void a_destroypending(void) |
| 2031 | { |
| 2032 | admin *a, *aa, *head; |
| 2033 | admin_bgop *bg, *bbg; |
| 2034 | admin_service *svc, *ssvc; |
| 2035 | |
| 2036 | /* --- Destroy connections marked as pending --- * |
| 2037 | * |
| 2038 | * Slightly messy. Killing clients may cause others to finally die. Make |
| 2039 | * sure that they can be put on the list without clobbering anything or |
| 2040 | * getting lost. |
| 2041 | */ |
| 2042 | |
| 2043 | while (a_dead) { |
| 2044 | head = a_dead; |
| 2045 | a_dead = 0; |
| 2046 | for (a = head; a; a = aa) { |
| 2047 | aa = a->next; |
| 2048 | assert(a->f & AF_DEAD); |
| 2049 | |
| 2050 | /* --- Report what we're doing --- */ |
| 2051 | |
| 2052 | T( trace(T_ADMIN, "admin: completing destruction of connection %u", |
| 2053 | a->seq); ) |
| 2054 | |
| 2055 | /* --- If this is the foreground client then shut down --- */ |
| 2056 | |
| 2057 | if (a->f & AF_FOREGROUND) { |
| 2058 | T( trace(T_ADMIN, "admin: foreground client quit: shutting down"); ) |
| 2059 | a_warn("SERVER", "quit", "foreground-eof", A_END); |
| 2060 | a_quit(); |
| 2061 | } |
| 2062 | |
| 2063 | /* --- Abort any background jobs in progress --- */ |
| 2064 | |
| 2065 | for (bg = a->bg; bg; bg = bbg) { |
| 2066 | bbg = bg->next; |
| 2067 | bg->cancel(bg); |
| 2068 | if (bg->tag) xfree(bg->tag); |
| 2069 | xfree(bg); |
| 2070 | } |
| 2071 | |
| 2072 | /* --- Release services I hold, and abort pending jobs --- */ |
| 2073 | |
| 2074 | for (svc = a->svcs; svc; svc = ssvc) { |
| 2075 | ssvc = svc->next; |
| 2076 | a_svcrelease(svc); |
| 2077 | } |
| 2078 | a_jobtablefinal(&a->j); |
| 2079 | |
| 2080 | /* --- Close file descriptors and selectory --- */ |
| 2081 | |
| 2082 | selbuf_destroy(&a->b); |
| 2083 | if (a->b.reader.fd != a->w.fd) close(a->b.reader.fd); |
| 2084 | close(a->w.fd); |
| 2085 | if (a_stdin == a) a_stdin = 0; |
| 2086 | |
| 2087 | /* --- Done --- */ |
| 2088 | |
| 2089 | DESTROY(a); |
| 2090 | } |
| 2091 | } |
| 2092 | } |
| 2093 | |
| 2094 | /* --- @a_destroy@ --- * |
| 2095 | * |
| 2096 | * Arguments: @admin *a@ = pointer to an admin block |
| 2097 | * |
| 2098 | * Returns: --- |
| 2099 | * |
| 2100 | * Use: Destroys an admin block. This requires a certain amount of |
| 2101 | * care. |
| 2102 | */ |
| 2103 | |
| 2104 | static void freequeue(oqueue *q) |
| 2105 | { |
| 2106 | obuf *o, *oo; |
| 2107 | |
| 2108 | for (o = q->hd; o; o = oo) { |
| 2109 | oo = o->next; |
| 2110 | xfree(o); |
| 2111 | } |
| 2112 | q->hd = q->tl = 0; |
| 2113 | } |
| 2114 | |
| 2115 | static void a_destroy(admin *a) |
| 2116 | { |
| 2117 | if (a->f & AF_DEAD) |
| 2118 | return; |
| 2119 | |
| 2120 | if (a->next) a->next->prev = a->prev; |
| 2121 | if (a->prev) a->prev->next = a->next; |
| 2122 | else admins = a->next; |
| 2123 | |
| 2124 | if (a->out.hd) sel_rmfile(&a->w); |
| 2125 | freequeue(&a->out); |
| 2126 | |
| 2127 | a->f |= AF_DEAD; |
| 2128 | a->next = a_dead; |
| 2129 | a_dead = a; |
| 2130 | |
| 2131 | T( trace(T_ADMIN, "admin: killing connection %u", a->seq); ) |
| 2132 | } |
| 2133 | |
| 2134 | /* --- @a_line@ --- * |
| 2135 | * |
| 2136 | * Arguments: @char *p@ = pointer to the line read |
| 2137 | * @size_t len@ = length of the line |
| 2138 | * @void *vp@ = pointer to my admin block |
| 2139 | * |
| 2140 | * Returns: --- |
| 2141 | * |
| 2142 | * Use: Handles a line of input. |
| 2143 | */ |
| 2144 | |
| 2145 | static void a_line(char *p, size_t len, void *vp) |
| 2146 | { |
| 2147 | admin *a = vp; |
| 2148 | const acmd *c; |
| 2149 | char *av[16 + 1]; |
| 2150 | size_t ac; |
| 2151 | |
| 2152 | QUICKRAND; |
| 2153 | if (a->f & AF_DEAD) |
| 2154 | return; |
| 2155 | if (!p) { |
| 2156 | if (!a->bg) |
| 2157 | a_destroy(a); |
| 2158 | else { |
| 2159 | a->f |= AF_CLOSE; |
| 2160 | selbuf_disable(&a->b); |
| 2161 | } |
| 2162 | return; |
| 2163 | } |
| 2164 | ac = str_qsplit(p, av, N(av) - 1, 0, STRF_QUOTE); |
| 2165 | if (!ac) |
| 2166 | return; |
| 2167 | av[ac] = 0; |
| 2168 | for (c = acmdtab; c->name; c++) { |
| 2169 | if (mystrieq(av[0], c->name)) { |
| 2170 | ac--; |
| 2171 | if (c->argmin > ac || ac > c->argmax) { |
| 2172 | if (!c->help) |
| 2173 | a_fail(a, "bad-syntax", "%s", c->name, "", A_END); |
| 2174 | else |
| 2175 | a_fail(a, "bad-syntax", "%s", c->name, "%s", c->help, A_END); |
| 2176 | } else |
| 2177 | c->func(a, ac, av + 1); |
| 2178 | return; |
| 2179 | } |
| 2180 | } |
| 2181 | a_fail(a, "unknown-command", "%s", av[0], A_END); |
| 2182 | } |
| 2183 | |
| 2184 | /* --- @a_create@ --- * |
| 2185 | * |
| 2186 | * Arguments: @int fd_in, fd_out@ = file descriptors to use |
| 2187 | * @unsigned f@ = initial flags to set |
| 2188 | * |
| 2189 | * Returns: --- |
| 2190 | * |
| 2191 | * Use: Creates a new admin connection. |
| 2192 | */ |
| 2193 | |
| 2194 | void a_create(int fd_in, int fd_out, unsigned f) |
| 2195 | { |
| 2196 | admin *a = CREATE(admin); |
| 2197 | |
| 2198 | T( static unsigned seq = 0; |
| 2199 | a->seq = seq++; ) |
| 2200 | T( trace(T_ADMIN, "admin: accepted connection %u", a->seq); ) |
| 2201 | a->bg = 0; |
| 2202 | a->ref = 0; |
| 2203 | a->svcs = 0; |
| 2204 | a_jobtableinit(&a->j); |
| 2205 | a->f = f; |
| 2206 | if (fd_in == STDIN_FILENO) a_stdin = a; |
| 2207 | fdflags(fd_in, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
| 2208 | if (fd_out != fd_in) |
| 2209 | fdflags(fd_out, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
| 2210 | selbuf_init(&a->b, &sel, fd_in, a_line, a); |
| 2211 | sel_initfile(&sel, &a->w, fd_out, SEL_WRITE, a_flush, a); |
| 2212 | a->out.hd = a->out.tl = 0; |
| 2213 | a->next = admins; |
| 2214 | a->prev = 0; |
| 2215 | if (admins) admins->prev = a; |
| 2216 | admins = a; |
| 2217 | } |
| 2218 | |
| 2219 | /* --- @a_accept@ --- * |
| 2220 | * |
| 2221 | * Arguments: @int fd@ = file descriptor to accept |
| 2222 | * @unsigned mode@ = what to do |
| 2223 | * @void *v@ = uninteresting pointer |
| 2224 | * |
| 2225 | * Returns: --- |
| 2226 | * |
| 2227 | * Use: Accepts a new admin connection. |
| 2228 | */ |
| 2229 | |
| 2230 | static void a_accept(int fd, unsigned mode, void *v) |
| 2231 | { |
| 2232 | int nfd; |
| 2233 | struct sockaddr_un sun; |
| 2234 | socklen_t sz = sizeof(sun); |
| 2235 | |
| 2236 | if ((nfd = accept(fd, (struct sockaddr *)&sun, &sz)) < 0) { |
| 2237 | if (errno != EINTR && errno != EAGAIN && errno != EWOULDBLOCK && |
| 2238 | errno != ECONNABORTED && errno != EPROTO) |
| 2239 | a_warn("ADMIN", "accept-error", "?ERRNO", A_END); |
| 2240 | return; |
| 2241 | } |
| 2242 | a_create(nfd, nfd, 0); |
| 2243 | } |
| 2244 | |
| 2245 | /* --- @a_preselect@ --- * |
| 2246 | * |
| 2247 | * Arguments: --- |
| 2248 | * |
| 2249 | * Returns: --- |
| 2250 | * |
| 2251 | * Use: Informs the admin module that we're about to select again, |
| 2252 | * and that it should do cleanup things it has delayed until a |
| 2253 | * `safe' time. |
| 2254 | */ |
| 2255 | |
| 2256 | void a_preselect(void) { if (a_dead) a_destroypending(); } |
| 2257 | |
| 2258 | /* --- @a_daemon@ --- * |
| 2259 | * |
| 2260 | * Arguments: --- |
| 2261 | * |
| 2262 | * Returns: --- |
| 2263 | * |
| 2264 | * Use: Informs the admin module that it's a daemon. |
| 2265 | */ |
| 2266 | |
| 2267 | void a_daemon(void) { flags |= F_DAEMON; } |
| 2268 | |
| 2269 | /* --- @a_init@ --- * |
| 2270 | * |
| 2271 | * Arguments: @const char *name@ = socket name to create |
| 2272 | * @uid_t u@ = user to own the socket |
| 2273 | * @gid_t g@ = group to own the socket |
| 2274 | * @mode_t m@ = permissions to set on the socket |
| 2275 | * |
| 2276 | * Returns: --- |
| 2277 | * |
| 2278 | * Use: Creates the admin listening socket. |
| 2279 | */ |
| 2280 | |
| 2281 | void a_init(const char *name, uid_t u, gid_t g, mode_t m) |
| 2282 | { |
| 2283 | int fd; |
| 2284 | int n = 5; |
| 2285 | struct sockaddr_un sun; |
| 2286 | struct sigaction sa; |
| 2287 | size_t sz; |
| 2288 | mode_t omask; |
| 2289 | |
| 2290 | /* --- Create services table --- */ |
| 2291 | |
| 2292 | sym_create(&a_svcs); |
| 2293 | |
| 2294 | /* --- Set up the socket address --- */ |
| 2295 | |
| 2296 | sz = strlen(name) + 1; |
| 2297 | if (sz > sizeof(sun.sun_path)) |
| 2298 | die(EXIT_FAILURE, "socket name `%s' too long", name); |
| 2299 | BURN(sun); |
| 2300 | sun.sun_family = AF_UNIX; |
| 2301 | memcpy(sun.sun_path, name, sz); |
| 2302 | sz += offsetof(struct sockaddr_un, sun_path); |
| 2303 | |
| 2304 | /* --- Attempt to bind to the socket --- */ |
| 2305 | |
| 2306 | omask = umask(0077); |
| 2307 | again: |
| 2308 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
| 2309 | die(EXIT_FAILURE, "couldn't create socket: %s", strerror(errno)); |
| 2310 | if (bind(fd, (struct sockaddr *)&sun, sz) < 0) { |
| 2311 | struct stat st; |
| 2312 | int e = errno; |
| 2313 | if (errno != EADDRINUSE) { |
| 2314 | die(EXIT_FAILURE, "couldn't bind to address `%s': %s", |
| 2315 | sun.sun_path, strerror(e)); |
| 2316 | } |
| 2317 | if (!n) |
| 2318 | die(EXIT_FAILURE, "too many retries; giving up"); |
| 2319 | n--; |
| 2320 | if (!connect(fd, (struct sockaddr *)&sun, sz)) { |
| 2321 | die(EXIT_FAILURE, "server already listening on admin socket `%s'", |
| 2322 | sun.sun_path); |
| 2323 | } |
| 2324 | if (errno != ECONNREFUSED) |
| 2325 | die(EXIT_FAILURE, "couldn't bind to address: %s", strerror(e)); |
| 2326 | if (stat(sun.sun_path, &st)) { |
| 2327 | die(EXIT_FAILURE, "couldn't stat `%s': %s", |
| 2328 | sun.sun_path, strerror(errno)); |
| 2329 | } |
| 2330 | if (!S_ISSOCK(st.st_mode)) |
| 2331 | die(EXIT_FAILURE, "object `%s' isn't a socket", sun.sun_path); |
| 2332 | T( trace(T_ADMIN, "admin: stale socket found; removing it"); ) |
| 2333 | unlink(sun.sun_path); |
| 2334 | close(fd); |
| 2335 | goto again; |
| 2336 | } |
| 2337 | if (chown(sun.sun_path, u, g)) { |
| 2338 | die(EXIT_FAILURE, "failed to set socket owner: %s", |
| 2339 | strerror(errno)); |
| 2340 | } |
| 2341 | if (chmod(sun.sun_path, m)) { |
| 2342 | die(EXIT_FAILURE, "failed to set socket permissions: %s", |
| 2343 | strerror(errno)); |
| 2344 | } |
| 2345 | umask(omask); |
| 2346 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
| 2347 | if (listen(fd, 5)) |
| 2348 | die(EXIT_FAILURE, "couldn't listen on socket: %s", strerror(errno)); |
| 2349 | |
| 2350 | /* --- Listen to the socket --- */ |
| 2351 | |
| 2352 | sel_initfile(&sel, &sock, fd, SEL_READ, a_accept, 0); |
| 2353 | sel_addfile(&sock); |
| 2354 | sockname = name; |
| 2355 | bres_init(&sel); |
| 2356 | T( trace_custom(a_trace, 0); |
| 2357 | trace(T_ADMIN, "admin: enabled custom tracing"); ) |
| 2358 | flags |= F_INIT; |
| 2359 | |
| 2360 | /* --- Set up signal handlers --- */ |
| 2361 | |
| 2362 | sig_add(&s_term, SIGTERM, a_sigdie, 0); |
| 2363 | sig_add(&s_hup, SIGHUP, a_sighup, 0); |
| 2364 | sigaction(SIGINT, 0, &sa); |
| 2365 | if (sa.sa_handler != SIG_IGN) |
| 2366 | sig_add(&s_int, SIGINT, a_sigdie, 0); |
| 2367 | } |
| 2368 | |
| 2369 | /*----- That's all, folks -------------------------------------------------*/ |