| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * An evil proxy for TrIPE |
| 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 "config.h" |
| 29 | |
| 30 | #include <assert.h> |
| 31 | #include <errno.h> |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <string.h> |
| 35 | #include <time.h> |
| 36 | |
| 37 | #include <sys/types.h> |
| 38 | #include <sys/time.h> |
| 39 | #include <unistd.h> |
| 40 | #include <fcntl.h> |
| 41 | |
| 42 | #include <sys/socket.h> |
| 43 | #include <netinet/in.h> |
| 44 | #include <arpa/inet.h> |
| 45 | #include <netdb.h> |
| 46 | |
| 47 | #include <mLib/alloc.h> |
| 48 | #include <mLib/dstr.h> |
| 49 | #include <mLib/fdflags.h> |
| 50 | #include <mLib/mdwopt.h> |
| 51 | #include <mLib/quis.h> |
| 52 | #include <mLib/report.h> |
| 53 | #include <mLib/sel.h> |
| 54 | #include <mLib/sub.h> |
| 55 | #include <mLib/tv.h> |
| 56 | |
| 57 | #include <catacomb/buf.h> |
| 58 | |
| 59 | #include <catacomb/key.h> |
| 60 | |
| 61 | #include <catacomb/mp.h> |
| 62 | #include <catacomb/mprand.h> |
| 63 | #include <catacomb/dh.h> |
| 64 | |
| 65 | #include <catacomb/noise.h> |
| 66 | #include <catacomb/rand.h> |
| 67 | #include <catacomb/rc4.h> |
| 68 | |
| 69 | #include "util.h" |
| 70 | |
| 71 | /*----- Data structures ---------------------------------------------------*/ |
| 72 | |
| 73 | typedef struct peer { |
| 74 | sel_file sf; |
| 75 | const char *name; |
| 76 | struct filter *f; |
| 77 | } peer; |
| 78 | |
| 79 | typedef struct filter { |
| 80 | struct filter *next; |
| 81 | peer *p_from, *p_to; |
| 82 | void (*func)(struct filter */*f*/, const octet */*buf*/, size_t /*sz*/); |
| 83 | void *state; |
| 84 | } filter; |
| 85 | |
| 86 | typedef struct qnode { |
| 87 | octet *buf; |
| 88 | size_t sz; |
| 89 | } qnode; |
| 90 | |
| 91 | /*----- Static variables --------------------------------------------------*/ |
| 92 | |
| 93 | #define PKBUFSZ 65536 |
| 94 | |
| 95 | static sel_state sel; |
| 96 | static peer peers[2]; |
| 97 | static unsigned npeer = 0; |
| 98 | static key_file keys; |
| 99 | static grand *rng; |
| 100 | |
| 101 | #define PASS(f, buf, sz) ((f) ? (f)->func((f), (buf), (sz)) : (void)0) |
| 102 | #define RND(i) (rng->ops->range(rng, (i))) |
| 103 | |
| 104 | /*----- Peer management ---------------------------------------------------*/ |
| 105 | |
| 106 | static void dopacket(int fd, unsigned mode, void *vv) |
| 107 | { |
| 108 | octet buf[PKBUFSZ]; |
| 109 | peer *p = vv; |
| 110 | int r = read(fd, buf, sizeof(buf)); |
| 111 | if (r >= 0) { |
| 112 | printf("recv from `%s'\n", p->name); |
| 113 | PASS(p->f, buf, r); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | static void addpeer(unsigned ac, char **av) |
| 118 | { |
| 119 | struct hostent *h; |
| 120 | struct sockaddr_in sin; |
| 121 | int len = PKBUFSZ; |
| 122 | peer *p; |
| 123 | int fd; |
| 124 | |
| 125 | if (ac != 4) |
| 126 | die(1, "syntax: peer:NAME:PORT:ADDR:PORT"); |
| 127 | if (npeer >= 2) |
| 128 | die(1, "enough peers already"); |
| 129 | if (!key_bytag(&keys, av[0])) |
| 130 | die(1, "no key named `%s'", av[0]); |
| 131 | p = &peers[npeer++]; |
| 132 | p->name = xstrdup(av[0]); |
| 133 | if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) |
| 134 | die(1, "socket: %s", strerror(errno)); |
| 135 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
| 136 | memset(&sin, 0, sizeof(sin)); |
| 137 | sin.sin_family = AF_INET; |
| 138 | sin.sin_addr.s_addr = INADDR_ANY; |
| 139 | sin.sin_port = htons(atoi(av[1])); |
| 140 | if (bind(fd, (struct sockaddr *)&sin, sizeof(sin))) |
| 141 | die(1, "bind: %s", strerror(errno)); |
| 142 | memset(&sin, 0, sizeof(sin)); |
| 143 | sin.sin_family = AF_INET; |
| 144 | if ((h = gethostbyname(av[2])) == 0) |
| 145 | die(1, "gethostbyname `%s'", av[2]); |
| 146 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)) || |
| 147 | setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len))) |
| 148 | die(1, "setsockopt: %s", strerror(errno)); |
| 149 | memcpy(&sin.sin_addr, h->h_addr, sizeof(sin.sin_addr)); |
| 150 | sin.sin_port = htons(atoi(av[3])); |
| 151 | if (connect(fd, (struct sockaddr *)&sin, sizeof(sin))) |
| 152 | die(1, "connect: %s", strerror(errno)); |
| 153 | sel_initfile(&sel, &p->sf, fd, SEL_READ, dopacket, p); |
| 154 | sel_addfile(&p->sf); |
| 155 | } |
| 156 | |
| 157 | /*----- Fork filter -------------------------------------------------------*/ |
| 158 | |
| 159 | typedef struct forknode { |
| 160 | struct forknode *next; |
| 161 | filter *f; |
| 162 | } forknode; |
| 163 | |
| 164 | typedef struct forkfilt { |
| 165 | const char *name; |
| 166 | forknode *fn; |
| 167 | } forkfilt; |
| 168 | |
| 169 | static void dofork(filter *f, const octet *buf, size_t sz) |
| 170 | { |
| 171 | forkfilt *ff = f->state; |
| 172 | forknode *fn; |
| 173 | unsigned i = 0; |
| 174 | |
| 175 | ff = f->state; |
| 176 | for (fn = ff->fn; fn; fn = fn->next) { |
| 177 | printf("fork branch %u of fork `%s'\n", i++, ff->name); |
| 178 | PASS(fn->f, buf, sz); |
| 179 | } |
| 180 | printf("fork branch %u of fork `%s'\n", i++, ff->name); |
| 181 | PASS(f->next, buf, sz); |
| 182 | } |
| 183 | |
| 184 | static void addfork(filter *f, unsigned ac, char **av) |
| 185 | { |
| 186 | forkfilt *ff; |
| 187 | if (ac != 1) |
| 188 | die(1, "syntax: filt:fork:NAME"); |
| 189 | ff = CREATE(forkfilt); |
| 190 | ff->name = xstrdup(av[0]); |
| 191 | ff->fn = 0; |
| 192 | f->func = dofork; |
| 193 | f->state = ff; |
| 194 | } |
| 195 | |
| 196 | static void nextfork(unsigned ac, char **av) |
| 197 | { |
| 198 | unsigned i, j; |
| 199 | filter *f; |
| 200 | forkfilt *ff; |
| 201 | forknode *fn, **ffn; |
| 202 | peer *p; |
| 203 | |
| 204 | if (ac < 1) |
| 205 | die(1, "syntax: next:NAME:..."); |
| 206 | for (i = 0; i < 2; i++) { |
| 207 | p = &peers[i]; |
| 208 | for (f = p->f; f; f = f->next) { |
| 209 | if (f->func != dofork) |
| 210 | continue; |
| 211 | ff = f->state; |
| 212 | for (j = 0; j < ac; j++) { |
| 213 | if (strcmp(av[j], ff->name) == 0) |
| 214 | goto match; |
| 215 | } |
| 216 | continue; |
| 217 | match: |
| 218 | fn = CREATE(forknode); |
| 219 | for (ffn = &ff->fn; *ffn; ffn = &(*ffn)->next) |
| 220 | ; |
| 221 | fn->f = f->next; |
| 222 | f->next = 0; |
| 223 | fn->next = 0; |
| 224 | *ffn = fn; |
| 225 | } |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /*----- Corrupt filter ----------------------------------------------------*/ |
| 230 | |
| 231 | typedef struct corrupt { |
| 232 | unsigned p_corrupt; |
| 233 | } corrupt; |
| 234 | |
| 235 | static void docorrupt(filter *f, const octet *buf, size_t sz) |
| 236 | { |
| 237 | corrupt *c = f->state; |
| 238 | octet b[PKBUFSZ]; |
| 239 | memcpy(b, buf, sz); |
| 240 | |
| 241 | while (!RND(c->p_corrupt)) { |
| 242 | puts("corrupt packet"); |
| 243 | b[RND(sz)] ^= RND(256); |
| 244 | } |
| 245 | PASS(f->next, b, sz); |
| 246 | } |
| 247 | |
| 248 | static void addcorrupt(filter *f, unsigned ac, char **av) |
| 249 | { |
| 250 | corrupt *c; |
| 251 | if (ac > 1) |
| 252 | die(1, "syntax: filt:corrupt[:P-CORRUPT]"); |
| 253 | c = CREATE(corrupt); |
| 254 | if (ac > 0) |
| 255 | c->p_corrupt = atoi(av[0]); |
| 256 | else |
| 257 | c->p_corrupt = 5; |
| 258 | f->state = c; |
| 259 | f->func = docorrupt; |
| 260 | } |
| 261 | |
| 262 | /*----- Drop filter -------------------------------------------------------*/ |
| 263 | |
| 264 | typedef struct drop { |
| 265 | unsigned p_drop; |
| 266 | } drop; |
| 267 | |
| 268 | static void dodrop(filter *f, const octet *buf, size_t sz) |
| 269 | { |
| 270 | drop *d = f->state; |
| 271 | |
| 272 | if (!RND(d->p_drop)) |
| 273 | puts("drop packet"); |
| 274 | else |
| 275 | PASS(f->next, buf, sz); |
| 276 | } |
| 277 | |
| 278 | static void adddrop(filter *f, unsigned ac, char **av) |
| 279 | { |
| 280 | drop *d; |
| 281 | if (ac > 1) |
| 282 | die(1, "syntax: filt:drop[:P-DROP]"); |
| 283 | d = CREATE(drop); |
| 284 | if (ac > 0) |
| 285 | d->p_drop = atoi(av[0]); |
| 286 | else |
| 287 | d->p_drop = 5; |
| 288 | f->state = d; |
| 289 | f->func = dodrop; |
| 290 | } |
| 291 | |
| 292 | /*----- Delay filter ------------------------------------------------------*/ |
| 293 | |
| 294 | typedef struct delaynode { |
| 295 | unsigned flag; |
| 296 | sel_timer tm; |
| 297 | unsigned i; |
| 298 | struct delay *d; |
| 299 | octet *buf; |
| 300 | size_t sz; |
| 301 | unsigned seq; |
| 302 | } delaynode; |
| 303 | |
| 304 | typedef struct delay { |
| 305 | unsigned max, n; |
| 306 | unsigned long t; |
| 307 | unsigned p_replay; |
| 308 | filter *f; |
| 309 | delaynode *q; |
| 310 | } delay; |
| 311 | |
| 312 | static void dtimer(struct timeval *tv, void *vv); |
| 313 | |
| 314 | static void dinsert(delaynode *dn) |
| 315 | { |
| 316 | struct timeval tv; |
| 317 | sel_timer *ta, *tb; |
| 318 | unsigned long tdelta = RND(dn->d->t); |
| 319 | gettimeofday(&tv, 0); |
| 320 | TV_ADDL(&tv, &tv, 0, tdelta); |
| 321 | assert(!dn->flag); |
| 322 | sel_addtimer(&sel, &dn->tm, &tv, dtimer, dn); |
| 323 | dn->flag = 1; |
| 324 | for (ta = tb = sel.timers; ta; ta = ta->next) { |
| 325 | ta = ta->next; if (!ta) break; assert(ta != tb); |
| 326 | ta = ta->next; if (!ta) break; assert(ta != tb); |
| 327 | tb = tb->next; |
| 328 | } |
| 329 | printf(" delay %lu usecs", tdelta); |
| 330 | } |
| 331 | |
| 332 | static void dsend(delaynode *dn, unsigned force) |
| 333 | { |
| 334 | delay *d = dn->d; |
| 335 | delaynode *ddn; |
| 336 | fputs(" send...\n", stdout); |
| 337 | assert(dn->buf); |
| 338 | PASS(d->f->next, dn->buf, dn->sz); |
| 339 | fputs("delay ...", stdout); |
| 340 | if (!force) |
| 341 | dinsert(dn); |
| 342 | else { |
| 343 | xfree(dn->buf); |
| 344 | dn->buf = 0; |
| 345 | d->n--; |
| 346 | if (dn->i < d->n) { |
| 347 | ddn = &d->q[d->n]; |
| 348 | sel_rmtimer(&ddn->tm); |
| 349 | sel_addtimer(&sel, &dn->tm, &ddn->tm.tv, dtimer, dn); |
| 350 | dn->flag = 1; |
| 351 | dn->buf = ddn->buf; |
| 352 | dn->sz = ddn->sz; |
| 353 | dn->seq = ddn->seq; |
| 354 | ddn->buf = 0; |
| 355 | ddn->flag = 0; |
| 356 | printf(" move id %u from slot %u to slot %u", ddn->seq, ddn->i, dn->i); |
| 357 | } |
| 358 | { unsigned i; for (i = 0; i < d->n; i++) assert(d->q[i].buf); } |
| 359 | fputs(" remove", stdout); |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | static void dtimer(struct timeval *tv, void *vv) |
| 364 | { |
| 365 | delaynode *dn = vv; |
| 366 | printf("delay timer peer `%s' id %u slot %u", |
| 367 | dn->d->f->p_from->name, dn->seq, dn->i); |
| 368 | dn->flag = 0; |
| 369 | dsend(dn, RND(dn->d->p_replay)); |
| 370 | fputc('\n', stdout); |
| 371 | } |
| 372 | |
| 373 | static void dodelay(filter *f, const octet *buf, size_t sz) |
| 374 | { |
| 375 | delay *d = f->state; |
| 376 | delaynode *dn; |
| 377 | static unsigned seq = 0; |
| 378 | |
| 379 | fputs("delay", stdout); |
| 380 | if (d->n == d->max) { |
| 381 | dn = &d->q[RND(d->n)]; |
| 382 | printf(" force uid %u", dn->seq); |
| 383 | sel_rmtimer(&dn->tm); |
| 384 | dn->flag = 0; |
| 385 | dsend(dn, 1); |
| 386 | fputc(';', stdout); |
| 387 | } |
| 388 | dn = &d->q[d->n++]; |
| 389 | dn->seq = seq++; |
| 390 | printf(" new id %u in slot %u", dn->seq, dn->i); |
| 391 | dn->buf = xmalloc(sz); |
| 392 | dn->sz = sz; |
| 393 | memcpy(dn->buf, buf, sz); |
| 394 | dinsert(dn); |
| 395 | fputc('\n', stdout); |
| 396 | } |
| 397 | |
| 398 | static void adddelay(filter *f, unsigned ac, char **av) |
| 399 | { |
| 400 | delay *d; |
| 401 | unsigned i; |
| 402 | |
| 403 | if (ac < 1 || ac > 3) |
| 404 | die(1, "syntax: filt:delay:QLEN[:MILLIS:P-REPLAY]"); |
| 405 | d = CREATE(delay); |
| 406 | d->max = atoi(av[0]); |
| 407 | if (ac > 1) |
| 408 | d->t = strtoul(av[1], 0, 10); |
| 409 | else |
| 410 | d->t = 100; |
| 411 | d->t *= 1000; |
| 412 | if (ac > 2) |
| 413 | d->p_replay = atoi(av[2]); |
| 414 | else |
| 415 | d->p_replay = 20; |
| 416 | d->n = 0; |
| 417 | d->q = xmalloc(d->max * sizeof(delaynode)); |
| 418 | d->f = f; |
| 419 | f->state = d; |
| 420 | f->func = dodelay; |
| 421 | for (i = 0; i < d->max; i++) { |
| 422 | d->q[i].d = d; |
| 423 | d->q[i].i = i; |
| 424 | d->q[i].buf = 0; |
| 425 | d->q[i].flag = 0; |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | /*----- Filters -----------------------------------------------------------*/ |
| 430 | |
| 431 | static void dosend(filter *f, const octet *buf, size_t sz) |
| 432 | { |
| 433 | printf("send to `%s'\n", f->p_to->name); |
| 434 | DISCARD(write(f->p_to->sf.fd, buf, sz)); |
| 435 | } |
| 436 | |
| 437 | static void addsend(filter *f, unsigned ac, char **av) |
| 438 | { |
| 439 | if (ac) |
| 440 | die(1, "syntax: filt:send"); |
| 441 | f->func = dosend; |
| 442 | } |
| 443 | |
| 444 | const struct filtab { |
| 445 | const char *name; |
| 446 | void (*func)(filter */*f*/, unsigned /*ac*/, char **/*av*/); |
| 447 | } filtab[] = { |
| 448 | { "send", addsend }, |
| 449 | { "fork", addfork }, |
| 450 | { "delay", adddelay }, |
| 451 | { "drop", adddrop }, |
| 452 | { "corrupt", addcorrupt }, |
| 453 | { 0, 0 } |
| 454 | }; |
| 455 | |
| 456 | static void dofilter(peer *from, peer *to, unsigned ac, char **av) |
| 457 | { |
| 458 | filter **ff, *f = CREATE(filter); |
| 459 | const struct filtab *ft; |
| 460 | if (ac < 1) |
| 461 | die(1, "syntax: {l,r,}filt:NAME:..."); |
| 462 | f->next = 0; |
| 463 | f->p_from = from; |
| 464 | f->p_to = to; |
| 465 | f->state = 0; |
| 466 | for (ff = &from->f; *ff; ff = &(*ff)->next) |
| 467 | ; |
| 468 | *ff = f; |
| 469 | for (ft = filtab; ft->name; ft++) { |
| 470 | if (strcmp(av[0], ft->name) == 0) { |
| 471 | ft->func(f, ac - 1, av + 1); |
| 472 | return; |
| 473 | } |
| 474 | } |
| 475 | die(1, "unknown filter `%s'", av[0]); |
| 476 | } |
| 477 | |
| 478 | /*----- Flooding ----------------------------------------------------------*/ |
| 479 | |
| 480 | typedef struct flood { |
| 481 | peer *p; |
| 482 | unsigned type; |
| 483 | size_t sz; |
| 484 | unsigned long t; |
| 485 | sel_timer tm; |
| 486 | } flood; |
| 487 | |
| 488 | static void setflood(flood *f); |
| 489 | |
| 490 | static void floodtimer(struct timeval *tv, void *vv) |
| 491 | { |
| 492 | flood *f = vv; |
| 493 | octet buf[PKBUFSZ]; |
| 494 | size_t sz; |
| 495 | |
| 496 | sz = RND(f->sz); |
| 497 | sz += RND(f->sz); |
| 498 | sz += RND(f->sz); |
| 499 | sz += RND(f->sz); |
| 500 | sz /= 2; |
| 501 | |
| 502 | rng->ops->fill(rng, buf, sz); |
| 503 | if (f->type < 0x100) |
| 504 | buf[0] = f->type; |
| 505 | puts("flood packet"); |
| 506 | PASS(f->p->f, buf, sz); |
| 507 | setflood(f); |
| 508 | } |
| 509 | |
| 510 | static void setflood(flood *f) |
| 511 | { |
| 512 | struct timeval tv; |
| 513 | gettimeofday(&tv, 0); |
| 514 | TV_ADDL(&tv, &tv, 0, RND(f->t)); |
| 515 | sel_addtimer(&sel, &f->tm, &tv, floodtimer, f); |
| 516 | } |
| 517 | |
| 518 | static void doflood(peer *p, unsigned ac, char **av) |
| 519 | { |
| 520 | flood *f; |
| 521 | if (ac > 3) |
| 522 | die(1, "syntax: flood[:TYPE:MILLIS:SIZE]"); |
| 523 | f = CREATE(flood); |
| 524 | f->p = p; |
| 525 | if (ac > 0) |
| 526 | f->type = strtoul(av[0], 0, 16); |
| 527 | else |
| 528 | f->type = 0x100; |
| 529 | if (ac > 1) |
| 530 | f->t = atoi(av[1]); |
| 531 | else |
| 532 | f->t = 10; |
| 533 | if (ac > 2) |
| 534 | f->sz = atoi(av[2]); |
| 535 | else |
| 536 | f->sz = 128; |
| 537 | f->t *= 1000; |
| 538 | setflood(f); |
| 539 | } |
| 540 | |
| 541 | /*----- Configuration commands --------------------------------------------*/ |
| 542 | |
| 543 | static void parse(char *p); |
| 544 | |
| 545 | static void addflood(unsigned ac, char **av) { |
| 546 | doflood(&peers[0], ac, av); |
| 547 | doflood(&peers[1], ac, av); |
| 548 | } |
| 549 | static void addlflood(unsigned ac, char **av) { |
| 550 | doflood(&peers[0], ac, av); |
| 551 | } |
| 552 | static void addrflood(unsigned ac, char **av) { |
| 553 | doflood(&peers[1], ac, av); |
| 554 | } |
| 555 | |
| 556 | static void addfilter(unsigned ac, char **av) { |
| 557 | dofilter(&peers[0], &peers[1], ac, av); |
| 558 | dofilter(&peers[1], &peers[0], ac, av); |
| 559 | } |
| 560 | static void addlfilter(unsigned ac, char **av) { |
| 561 | dofilter(&peers[0], &peers[1], ac, av); |
| 562 | } |
| 563 | static void addrfilter(unsigned ac, char **av) { |
| 564 | dofilter(&peers[1], &peers[0], ac, av); |
| 565 | } |
| 566 | |
| 567 | static void include(unsigned ac, char **av) |
| 568 | { |
| 569 | FILE *fp; |
| 570 | dstr d = DSTR_INIT; |
| 571 | if (!ac) |
| 572 | die(1, "syntax: include:FILE:..."); |
| 573 | while (*av) { |
| 574 | if ((fp = fopen(*av, "r")) == 0) |
| 575 | die(1, "fopen `%s': %s", *av, strerror(errno)); |
| 576 | while (dstr_putline(&d, fp) != EOF) { |
| 577 | parse(d.buf); |
| 578 | DRESET(&d); |
| 579 | } |
| 580 | fclose(fp); |
| 581 | av++; |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | const struct cmdtab { |
| 586 | const char *name; |
| 587 | void (*func)(unsigned /*ac*/, char **/*av*/); |
| 588 | } cmdtab[] = { |
| 589 | { "peer", addpeer }, |
| 590 | { "include", include }, |
| 591 | { "filt", addfilter }, |
| 592 | { "lfilt", addlfilter }, |
| 593 | { "rfilt", addrfilter }, |
| 594 | { "next", nextfork }, |
| 595 | { "flood", addflood }, |
| 596 | { "lflood", addlflood }, |
| 597 | { "rflood", addrflood }, |
| 598 | { 0, 0 } |
| 599 | }; |
| 600 | |
| 601 | #define AVMAX 16 |
| 602 | |
| 603 | static void parse(char *p) |
| 604 | { |
| 605 | char *v[AVMAX]; |
| 606 | unsigned c = 0; |
| 607 | const struct cmdtab *ct; |
| 608 | |
| 609 | p = strtok(p, ":"); |
| 610 | if (!p || *p == '#') |
| 611 | return; |
| 612 | do { |
| 613 | v[c++] = p; |
| 614 | p = strtok(0, ":"); |
| 615 | } while (p && c < AVMAX - 1); |
| 616 | v[c] = 0; |
| 617 | for (ct = cmdtab; ct->name; ct++) { |
| 618 | if (strcmp(ct->name, v[0]) == 0) { |
| 619 | ct->func(c - 1, v + 1); |
| 620 | return; |
| 621 | } |
| 622 | } |
| 623 | die(1, "unknown command `%s'", v[0]); |
| 624 | } |
| 625 | |
| 626 | /*----- Main driver -------------------------------------------------------*/ |
| 627 | |
| 628 | static void version(FILE *fp) |
| 629 | { pquis(fp, "$, TrIPE version " VERSION "\n"); } |
| 630 | |
| 631 | static void usage(FILE *fp) |
| 632 | { pquis(fp, "Usage: $ [-k KEYRING] DIRECTIVE...\n"); } |
| 633 | |
| 634 | static void help(FILE *fp) |
| 635 | { |
| 636 | version(fp); |
| 637 | putc('\n', fp); |
| 638 | usage(fp); |
| 639 | fputs("\n\ |
| 640 | Options:\n\ |
| 641 | \n\ |
| 642 | -h, --help Show this help text.\n\ |
| 643 | -v, --version Show the version number.\n\ |
| 644 | -u, --usage Show terse usage summary.\n\ |
| 645 | \n\ |
| 646 | -k, --keyring=FILE Fetch keys from FILE.\n\ |
| 647 | \n\ |
| 648 | Directives:\n\ |
| 649 | peer:NAME:LOCAL-PORT:REMOTE-ADDR:REMOTE-PORT\n\ |
| 650 | include:FILE\n\ |
| 651 | {,l,r}filt:FILTER:ARGS:...\n\ |
| 652 | next:TAG\n\ |
| 653 | {,l,r}flood:TYPE:MILLIS:SIZE\n\ |
| 654 | \n\ |
| 655 | Filters:\n\ |
| 656 | send\n\ |
| 657 | fork:TAG\n\ |
| 658 | delay:QLEN[:MILLIS:P-REPLAY]\n\ |
| 659 | drop[:P-DROP]\n\ |
| 660 | corrupt[:P-CORRUPT]\n", |
| 661 | fp); |
| 662 | } |
| 663 | |
| 664 | int main(int argc, char *argv[]) |
| 665 | { |
| 666 | const char *kfname = "keyring.pub"; |
| 667 | int i; |
| 668 | unsigned f = 0; |
| 669 | char buf[16]; |
| 670 | |
| 671 | #define f_bogus 1u |
| 672 | |
| 673 | ego(argv[0]); |
| 674 | for (;;) { |
| 675 | static const struct option opt[] = { |
| 676 | { "help", 0, 0, 'h' }, |
| 677 | { "version", 0, 0, 'v' }, |
| 678 | { "usage", 0, 0, 'u' }, |
| 679 | { "keyring", OPTF_ARGREQ, 0, 'k' }, |
| 680 | { 0, 0, 0, 0 } |
| 681 | }; |
| 682 | if ((i = mdwopt(argc, argv, "hvuk:", opt, 0, 0, 0)) < 0) |
| 683 | break; |
| 684 | switch (i) { |
| 685 | case 'h': |
| 686 | help(stdout); |
| 687 | exit(0); |
| 688 | case 'v': |
| 689 | version(stdout); |
| 690 | exit(0); |
| 691 | case 'u': |
| 692 | usage(stdout); |
| 693 | exit(0); |
| 694 | case 'k': |
| 695 | kfname = optarg; |
| 696 | break; |
| 697 | default: |
| 698 | f |= f_bogus; |
| 699 | break; |
| 700 | } |
| 701 | } |
| 702 | if (f & f_bogus) { |
| 703 | usage(stderr); |
| 704 | exit(1); |
| 705 | } |
| 706 | rand_noisesrc(RAND_GLOBAL, &noise_source); |
| 707 | rand_seed(RAND_GLOBAL, 160); |
| 708 | rand_get(RAND_GLOBAL, buf, sizeof(buf)); |
| 709 | rng = rc4_rand(buf, sizeof(buf)); |
| 710 | sel_init(&sel); |
| 711 | if (key_open(&keys, kfname, KOPEN_READ, key_moan, 0)) |
| 712 | die(1, "couldn't open `%s': %s", kfname, strerror(errno)); |
| 713 | for (i = optind; i < argc; i++) |
| 714 | parse(argv[i]); |
| 715 | if (npeer != 2) |
| 716 | die(1, "need two peers"); |
| 717 | for (;;) { |
| 718 | if (sel_select(&sel) && errno != EINTR) |
| 719 | die(1, "select failed: %s", strerror(errno)); |
| 720 | } |
| 721 | |
| 722 | #undef f_bogus |
| 723 | } |
| 724 | |
| 725 | /*----- That's all, folks -------------------------------------------------*/ |