Commit | Line | Data |
---|---|---|
07212ba4 | 1 | /* -*-c-*- |
07212ba4 | 2 | * |
3 | * Forwarding UDP packets over a stream | |
4 | * | |
5 | * (c) 2003 Straylight/Edgeware | |
6 | */ | |
7 | ||
e04c2d50 | 8 | /*----- Licensing notice --------------------------------------------------* |
07212ba4 | 9 | * |
10 | * This file is part of Trivial IP Encryption (TrIPE). | |
11 | * | |
11ad66c2 MW |
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. | |
e04c2d50 | 16 | * |
11ad66c2 MW |
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. | |
e04c2d50 | 21 | * |
07212ba4 | 22 | * You should have received a copy of the GNU General Public License |
11ad66c2 | 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
07212ba4 | 24 | */ |
25 | ||
07212ba4 | 26 | /*----- Header files ------------------------------------------------------*/ |
27 | ||
28 | #include "config.h" | |
29 | ||
30 | #include <ctype.h> | |
31 | #include <errno.h> | |
32 | #include <stdio.h> | |
33 | #include <stdlib.h> | |
34 | #include <string.h> | |
35 | ||
36 | #include <sys/time.h> | |
37 | #include <sys/types.h> | |
38 | #include <unistd.h> | |
39 | #include <fcntl.h> | |
40 | #include <sys/uio.h> | |
41 | #include <sys/socket.h> | |
42 | #include <netinet/in.h> | |
43 | #include <arpa/inet.h> | |
44 | #include <netdb.h> | |
45 | ||
46 | #include <mLib/alloc.h> | |
47 | #include <mLib/bits.h> | |
5c8525cb | 48 | #include <mLib/darray.h> |
07212ba4 | 49 | #include <mLib/dstr.h> |
50 | #include <mLib/fdflags.h> | |
51 | #include <mLib/mdwopt.h> | |
52 | #include <mLib/quis.h> | |
53 | #include <mLib/report.h> | |
54 | #include <mLib/sel.h> | |
55 | #include <mLib/selpk.h> | |
56 | ||
23df0e5b MW |
57 | #include "util.h" |
58 | ||
07212ba4 | 59 | /*----- Data structures ---------------------------------------------------*/ |
60 | ||
5db82aca MW |
61 | typedef union addr { |
62 | struct sockaddr sa; | |
63 | struct sockaddr_in sin; | |
64 | } addr; | |
65 | ||
5c8525cb MW |
66 | DA_DECL(addr_v, addr); |
67 | DA_DECL(str_v, const char *); | |
68 | ||
07212ba4 | 69 | typedef struct pk { |
70 | struct pk *next; /* Next packet in the chain */ | |
71 | octet *p, *o; /* Buffer start and current posn */ | |
72 | size_t n; /* Size of packet remaining */ | |
73 | } pk; | |
74 | ||
75 | typedef struct pkstream { | |
76 | unsigned f; /* Flags... */ | |
77 | #define PKF_FULL 1u /* Buffer is full: stop reading */ | |
78 | sel_file r, w; /* Read and write selectors */ | |
79 | pk *pks, **pk_tail; /* Packet queue */ | |
80 | size_t npk, szpk; /* Number and size of data */ | |
81 | selpk p; /* Packet parser */ | |
82 | } pkstream; | |
83 | ||
84 | typedef struct connwait { | |
8fc71d5a MW |
85 | unsigned f; /* Various flags */ |
86 | #define cwf_port 1u /* Port is defined => listen */ | |
5c8525cb MW |
87 | sel_file *sfv; /* Selectors */ |
88 | addr_v me, peer; /* Who I'm meant to be; who peer is */ | |
07212ba4 | 89 | } connwait; |
90 | ||
91 | /*----- Static variables --------------------------------------------------*/ | |
92 | ||
93 | static sel_state sel; | |
94 | static connwait cw; | |
95 | static int fd_udp; | |
1afc65b6 | 96 | static size_t pk_nmax = 128, pk_szmax = 1024*1024; |
07212ba4 | 97 | |
98 | /*----- Main code ---------------------------------------------------------*/ | |
99 | ||
100 | static int nonblockify(int fd) | |
f98df549 | 101 | { return (fdflags(fd, O_NONBLOCK, O_NONBLOCK, 0, 0)); } |
07212ba4 | 102 | |
103 | static int cloexec(int fd) | |
f98df549 | 104 | { return (fdflags(fd, 0, 0, FD_CLOEXEC, FD_CLOEXEC)); } |
07212ba4 | 105 | |
5426c57a MW |
106 | static socklen_t addrsz(const addr *a) |
107 | { | |
108 | switch (a->sa.sa_family) { | |
109 | case AF_INET: return sizeof(a->sin); | |
110 | default: abort(); | |
111 | } | |
112 | } | |
113 | ||
d66e33f0 MW |
114 | static int knownafp(int af) |
115 | { | |
116 | switch (af) { | |
117 | case AF_INET: return (1); | |
118 | default: return (0); | |
119 | } | |
120 | } | |
121 | ||
2fb1657b MW |
122 | static int initsock(int fd, int af) |
123 | { | |
124 | switch (af) { | |
125 | case AF_INET: break; | |
126 | default: abort(); | |
127 | } | |
128 | return (0); | |
129 | } | |
130 | ||
5426c57a MW |
131 | static const char *addrstr(const addr *a) |
132 | { | |
133 | static char buf[128]; | |
134 | socklen_t n = sizeof(buf); | |
135 | ||
136 | if (getnameinfo(&a->sa, addrsz(a), buf, n, 0, 0, NI_NUMERICHOST)) | |
137 | return ("<addrstr failed>"); | |
138 | return (buf); | |
139 | } | |
140 | ||
141 | static int addreq(const addr *a, const addr *b) | |
142 | { | |
143 | if (a->sa.sa_family != b->sa.sa_family) return (0); | |
144 | switch (a->sa.sa_family) { | |
145 | case AF_INET: | |
146 | return (a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr); | |
147 | default: | |
148 | abort(); | |
149 | } | |
150 | } | |
151 | ||
d66e33f0 | 152 | static void initaddr(addr *a, int af) |
3912d793 | 153 | { |
d66e33f0 MW |
154 | a->sa.sa_family = af; |
155 | switch (af) { | |
156 | case AF_INET: | |
157 | a->sin.sin_addr.s_addr = INADDR_ANY; | |
158 | a->sin.sin_port = 0; | |
159 | break; | |
160 | default: | |
161 | abort(); | |
162 | } | |
3912d793 MW |
163 | } |
164 | ||
0bf142d2 MW |
165 | #define caf_addr 1u |
166 | #define caf_port 2u | |
167 | static void copyaddr(addr *a, const struct sockaddr *sa, unsigned f) | |
168 | { | |
169 | const struct sockaddr_in *sin; | |
170 | ||
171 | a->sa.sa_family = sa->sa_family; | |
172 | switch (sa->sa_family) { | |
173 | case AF_INET: | |
174 | sin = (const struct sockaddr_in *)sa; | |
175 | if (f&caf_addr) a->sin.sin_addr = sin->sin_addr; | |
176 | if (f&caf_port) a->sin.sin_port = sin->sin_port; | |
177 | break; | |
178 | default: | |
179 | abort(); | |
180 | } | |
181 | } | |
182 | ||
07212ba4 | 183 | static void dolisten(void); |
184 | ||
185 | static void doclose(pkstream *p) | |
186 | { | |
187 | pk *pk, *ppk; | |
188 | close(p->w.fd); | |
189 | close(p->p.reader.fd); | |
190 | selpk_destroy(&p->p); | |
1afc65b6 MW |
191 | if (!(p->f&PKF_FULL)) sel_rmfile(&p->r); |
192 | if (p->npk) sel_rmfile(&p->w); | |
07212ba4 | 193 | for (pk = p->pks; pk; pk = ppk) { |
194 | ppk = pk->next; | |
195 | xfree(pk->p); | |
196 | xfree(pk); | |
197 | } | |
198 | xfree(p); | |
8fc71d5a | 199 | if (cw.f&cwf_port) dolisten(); |
1afc65b6 | 200 | else exit(0); |
07212ba4 | 201 | } |
202 | ||
203 | static void rdtcp(octet *b, size_t sz, pkbuf *pk, size_t *k, void *vp) | |
204 | { | |
205 | pkstream *p = vp; | |
206 | size_t pksz; | |
207 | ||
1afc65b6 | 208 | if (!sz) { doclose(p); return; } |
07212ba4 | 209 | pksz = LOAD16(b); |
210 | if (pksz + 2 == sz) { | |
99735357 | 211 | DISCARD(write(fd_udp, b + 2, pksz)); |
07212ba4 | 212 | selpk_want(&p->p, 2); |
213 | } else { | |
214 | selpk_want(&p->p, pksz + 2); | |
215 | *k = sz; | |
216 | } | |
217 | } | |
218 | ||
219 | static void wrtcp(int fd, unsigned mode, void *vp) | |
220 | { | |
221 | #define NPK 16 | |
222 | struct iovec iov[NPK]; | |
223 | pkstream *p = vp; | |
224 | size_t i; | |
225 | ssize_t n; | |
226 | pk *pk, *ppk; | |
227 | ||
228 | for (i = 0, pk = p->pks; i < NPK && pk; i++, pk = pk->next) { | |
229 | iov[i].iov_base = pk->o; | |
230 | iov[i].iov_len = pk->n; | |
231 | } | |
232 | ||
233 | if ((n = writev(fd, iov, i)) < 0) { | |
1afc65b6 | 234 | if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) return; |
07212ba4 | 235 | moan("couldn't write to TCP socket: %s", strerror(errno)); |
236 | doclose(p); | |
237 | return; | |
238 | } | |
239 | ||
240 | p->szpk -= n; | |
241 | for (pk = p->pks; n && pk; pk = ppk) { | |
242 | ppk = pk->next; | |
243 | if (pk->n <= n) { | |
244 | p->npk--; | |
245 | n -= pk->n; | |
246 | xfree(pk->p); | |
247 | xfree(pk); | |
248 | } else { | |
249 | pk->n -= n; | |
250 | pk->o += n; | |
251 | break; | |
252 | } | |
253 | } | |
254 | p->pks = pk; | |
1afc65b6 MW |
255 | if (!pk) { p->pk_tail = &p->pks; sel_rmfile(&p->w); } |
256 | if ((p->f&PKF_FULL) && p->npk < pk_nmax && p->szpk < pk_szmax) | |
257 | { p->f &= ~PKF_FULL; sel_addfile(&p->r); } | |
07212ba4 | 258 | } |
259 | ||
260 | static void rdudp(int fd, unsigned mode, void *vp) | |
261 | { | |
262 | octet buf[65536]; | |
263 | ssize_t n; | |
264 | pkstream *p = vp; | |
265 | pk *pk; | |
266 | ||
267 | if ((n = read(fd, buf, sizeof(buf))) < 0) { | |
268 | if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) | |
269 | return; | |
270 | moan("couldn't read from UDP socket: %s", strerror(errno)); | |
271 | return; | |
272 | } | |
273 | pk = xmalloc(sizeof(*pk)); | |
274 | pk->next = 0; | |
275 | pk->p = xmalloc(n + 2); | |
276 | STORE16(pk->p, n); | |
277 | memcpy(pk->p + 2, buf, n); | |
278 | pk->o = pk->p; | |
279 | pk->n = n + 2; | |
280 | *p->pk_tail = pk; | |
281 | p->pk_tail = &pk->next; | |
1afc65b6 | 282 | if (!p->npk) sel_addfile(&p->w); |
07212ba4 | 283 | sel_force(&p->w); |
284 | p->npk++; | |
285 | p->szpk += n + 2; | |
1afc65b6 MW |
286 | if (p->npk >= pk_nmax || p->szpk >= pk_szmax) |
287 | { sel_rmfile(&p->r); p->f |= PKF_FULL; } | |
07212ba4 | 288 | } |
289 | ||
290 | static void dofwd(int fd_in, int fd_out) | |
291 | { | |
292 | pkstream *p = xmalloc(sizeof(*p)); | |
293 | sel_initfile(&sel, &p->r, fd_udp, SEL_READ, rdudp, p); | |
294 | sel_initfile(&sel, &p->w, fd_out, SEL_WRITE, wrtcp, p); | |
295 | selpk_init(&p->p, &sel, fd_in, rdtcp, p); | |
296 | selpk_want(&p->p, 2); | |
297 | p->pks = 0; | |
298 | p->pk_tail = &p->pks; | |
299 | p->npk = p->szpk = 0; | |
300 | p->f = 0; | |
301 | sel_addfile(&p->r); | |
302 | } | |
303 | ||
304 | static void doaccept(int fd_s, unsigned mode, void *p) | |
305 | { | |
306 | int fd; | |
5db82aca MW |
307 | addr a; |
308 | socklen_t sz = sizeof(a); | |
5c8525cb | 309 | size_t i, n; |
07212ba4 | 310 | |
5db82aca | 311 | if ((fd = accept(fd_s, &a.sa, &sz)) < 0) { |
1afc65b6 | 312 | if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) return; |
07212ba4 | 313 | moan("couldn't accept incoming connection: %s", strerror(errno)); |
314 | return; | |
315 | } | |
5c8525cb MW |
316 | n = DA_LEN(&cw.peer); |
317 | if (!n) goto match; | |
318 | for (i = 0; i < n; i++) if (addreq(&a, &DA(&cw.peer)[i])) goto match; | |
319 | moan("rejecting connection from %s", addrstr(&a)); | |
320 | close(fd); return; | |
321 | match: | |
07212ba4 | 322 | if (nonblockify(fd) || cloexec(fd)) { |
07212ba4 | 323 | moan("couldn't accept incoming connection: %s", strerror(errno)); |
1afc65b6 | 324 | close(fd); return; |
07212ba4 | 325 | } |
326 | dofwd(fd, fd); | |
5c8525cb MW |
327 | n = DA_LEN(&cw.me); |
328 | for (i = 0; i < n; i++) { close(cw.sfv[i].fd); sel_rmfile(&cw.sfv[i]); } | |
07212ba4 | 329 | } |
330 | ||
5c8525cb | 331 | static void dolisten1(const addr *a, sel_file *sf) |
07212ba4 | 332 | { |
333 | int fd; | |
334 | int opt = 1; | |
335 | ||
5c8525cb | 336 | if ((fd = socket(a->sa.sa_family, SOCK_STREAM, IPPROTO_TCP)) < 0 || |
07212ba4 | 337 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) || |
2fb1657b | 338 | initsock(fd, a->sa.sa_family) || |
5c8525cb | 339 | bind(fd, &a->sa, addrsz(a)) || |
07212ba4 | 340 | listen(fd, 1) || nonblockify(fd) || cloexec(fd)) |
341 | die(1, "couldn't set up listening socket: %s", strerror(errno)); | |
5c8525cb MW |
342 | sel_initfile(&sel, sf, fd, SEL_READ, doaccept, 0); |
343 | sel_addfile(sf); | |
344 | } | |
345 | ||
346 | static void dolisten(void) | |
347 | { | |
348 | size_t i, n; | |
349 | ||
350 | n = DA_LEN(&cw.me); | |
351 | for (i = 0; i < n; i++) | |
352 | dolisten1(&DA(&cw.me)[i], &cw.sfv[i]); | |
353 | } | |
354 | ||
0bf142d2 | 355 | static void pushaddrs(addr_v *av, const struct addrinfo *ailist) |
5c8525cb | 356 | { |
0bf142d2 MW |
357 | const struct addrinfo *ai; |
358 | size_t i, n; | |
359 | ||
d66e33f0 MW |
360 | for (ai = ailist, n = 0; ai; ai = ai->ai_next) |
361 | if (knownafp(ai->ai_family)) n++; | |
0bf142d2 MW |
362 | DA_ENSURE(av, n); |
363 | for (i = DA_LEN(av), ai = ailist; ai; ai = ai->ai_next) { | |
d66e33f0 MW |
364 | if (!knownafp(ai->ai_family)) continue; |
365 | initaddr(&DA(av)[i], ai->ai_family); | |
0bf142d2 MW |
366 | copyaddr(&DA(av)[i++], ai->ai_addr, caf_addr | caf_port); |
367 | } | |
368 | DA_EXTEND(av, n); | |
07212ba4 | 369 | } |
370 | ||
3912d793 | 371 | #define paf_parse 1u |
0bf142d2 MW |
372 | static void parseaddr(const struct addrinfo *aihint, |
373 | const char *host, const char *svc, unsigned f, | |
374 | struct addrinfo **ai_out) | |
07212ba4 | 375 | { |
3912d793 | 376 | char *alloc = 0, *sep; |
0bf142d2 | 377 | int err; |
1afc65b6 | 378 | |
3912d793 MW |
379 | if (f&paf_parse) { |
380 | alloc = xstrdup(host); | |
381 | if ((sep = strchr(alloc, ':')) == 0) | |
382 | die(1, "missing port number in address `%s'", host); | |
383 | host = alloc; *sep = 0; svc = sep + 1; | |
07212ba4 | 384 | } |
385 | ||
0bf142d2 MW |
386 | err = getaddrinfo(host, svc, aihint, ai_out); |
387 | if (err) { | |
388 | if (host && svc) { | |
389 | die(1, "failed to resolve hostname `%s', service `%s': %s", | |
390 | host, svc, gai_strerror(err)); | |
391 | } else if (host) | |
392 | die(1, "failed to resolve hostname `%s': %s", host, gai_strerror(err)); | |
3912d793 | 393 | else |
0bf142d2 | 394 | die(1, "failed to resolve service `%s': %s", svc, gai_strerror(err)); |
07212ba4 | 395 | } |
3912d793 MW |
396 | |
397 | xfree(alloc); | |
07212ba4 | 398 | } |
399 | ||
400 | static void usage(FILE *fp) | |
401 | { | |
402 | pquis(fp, | |
ef4a1ab7 | 403 | "Usage: $ [-l PORT] [-b ADDR] [-p ADDR] [-c ADDR:PORT]\n\ |
404 | ADDR:PORT ADDR:PORT\n"); | |
07212ba4 | 405 | } |
406 | ||
407 | static void version(FILE *fp) | |
f98df549 | 408 | { pquis(fp, "$, tripe version " VERSION "\n"); } |
07212ba4 | 409 | |
410 | static void help(FILE *fp) | |
411 | { | |
412 | version(fp); | |
413 | fputc('\n', fp); | |
414 | usage(fp); | |
415 | fputs("\n\ | |
416 | Options:\n\ | |
417 | \n\ | |
418 | -h, --help Display this help text.\n\ | |
419 | -v, --version Display version number.\n\ | |
420 | -u, --usage Display pointless usage message.\n\ | |
421 | \n\ | |
422 | -l, --listen=PORT Listen for connections to TCP PORT.\n\ | |
ef4a1ab7 | 423 | -p, --peer=ADDR Only accept connections from IP ADDR.\n\ |
424 | -b, --bind=ADDR Bind to ADDR before connecting.\n\ | |
07212ba4 | 425 | -c, --connect=ADDR:PORT Connect to IP ADDR, TCP PORT.\n\ |
426 | \n\ | |
427 | Forwards UDP packets over a reliable stream. By default, uses stdin and\n\ | |
428 | stdout; though it can use TCP sockets instead.\n\ | |
429 | ", fp); | |
430 | } | |
431 | ||
432 | int main(int argc, char *argv[]) | |
433 | { | |
434 | unsigned f = 0; | |
5c8525cb MW |
435 | str_v bindhosts = DA_INIT, peerhosts = DA_INIT; |
436 | const char *bindsvc = 0; | |
5db82aca | 437 | addr bindaddr; |
3912d793 | 438 | const char *connhost = 0; |
0bf142d2 | 439 | struct addrinfo aihint = { 0 }, *ai, *ailist; |
3912d793 | 440 | int fd = -1; |
07212ba4 | 441 | int len = 65536; |
5c8525cb | 442 | size_t i, n; |
07212ba4 | 443 | |
444 | #define f_bogus 1u | |
445 | ||
8fc71d5a MW |
446 | cw.f = 0; |
447 | ||
07212ba4 | 448 | ego(argv[0]); |
07212ba4 | 449 | sel_init(&sel); |
450 | for (;;) { | |
451 | static struct option opt[] = { | |
452 | { "help", 0, 0, 'h' }, | |
453 | { "version", 0, 0, 'v' }, | |
454 | { "usage", 0, 0, 'u' }, | |
455 | { "listen", OPTF_ARGREQ, 0, 'l' }, | |
456 | { "peer", OPTF_ARGREQ, 0, 'p' }, | |
ef4a1ab7 | 457 | { "bind", OPTF_ARGREQ, 0, 'b' }, |
07212ba4 | 458 | { "connect", OPTF_ARGREQ, 0, 'c' }, |
459 | { 0, 0, 0, 0 } | |
460 | }; | |
461 | int i; | |
462 | ||
ef4a1ab7 | 463 | i = mdwopt(argc, argv, "hvul:p:b:c:", opt, 0, 0, 0); |
07212ba4 | 464 | if (i < 0) |
465 | break; | |
466 | switch (i) { | |
1afc65b6 MW |
467 | case 'h': help(stdout); exit(0); |
468 | case 'v': version(stdout); exit(0); | |
469 | case 'u': usage(stdout); exit(0); | |
3912d793 | 470 | case 'l': bindsvc = optarg; break; |
5c8525cb MW |
471 | case 'p': DA_PUSH(&peerhosts, optarg); break; |
472 | case 'b': DA_PUSH(&bindhosts, optarg); break; | |
3912d793 | 473 | case 'c': connhost = optarg; break; |
1afc65b6 | 474 | default: f |= f_bogus; break; |
07212ba4 | 475 | } |
476 | } | |
1afc65b6 | 477 | if (optind + 2 != argc || (f&f_bogus)) { usage(stderr); exit(1); } |
07212ba4 | 478 | |
5c8525cb | 479 | if (DA_LEN(&bindhosts) && !bindsvc && !connhost) |
3912d793 | 480 | die(1, "bind addr only makes sense when listening or connecting"); |
5c8525cb | 481 | if (DA_LEN(&peerhosts) && !bindsvc) |
3912d793 MW |
482 | die(1, "peer addr only makes sense when listening"); |
483 | if (bindsvc && connhost) | |
484 | die(1, "can't listen and connect"); | |
485 | ||
0bf142d2 | 486 | aihint.ai_family = AF_INET; |
5c8525cb MW |
487 | DA_CREATE(&cw.me); DA_CREATE(&cw.peer); |
488 | ||
489 | n = DA_LEN(&bindhosts); | |
490 | if (n || bindsvc) { | |
0bf142d2 MW |
491 | aihint.ai_socktype = SOCK_STREAM; |
492 | aihint.ai_protocol = IPPROTO_TCP; | |
493 | aihint.ai_flags = AI_ADDRCONFIG | AI_PASSIVE; | |
5c8525cb | 494 | if (!n) { |
0bf142d2 MW |
495 | parseaddr(&aihint, 0, bindsvc, 0, &ailist); |
496 | pushaddrs(&cw.me, ailist); | |
497 | freeaddrinfo(ailist); | |
5c8525cb MW |
498 | } else if (!bindsvc) { |
499 | if (n != 1) die(1, "can only bind to one address as client"); | |
d66e33f0 MW |
500 | parseaddr(&aihint, DA(&bindhosts)[0], 0, 0, &ailist); |
501 | for (ai = ailist; ai && !knownafp(ai->ai_family); ai = ai->ai_next); | |
502 | if (!ai) | |
503 | die(1, "no usable addresses returned for `%s'", DA(&bindhosts)[0]); | |
504 | initaddr(&bindaddr, ai->ai_family); | |
0bf142d2 | 505 | copyaddr(&bindaddr, ai->ai_addr, caf_addr); |
d66e33f0 | 506 | aihint.ai_family = ai->ai_family; |
0bf142d2 | 507 | freeaddrinfo(ailist); |
5c8525cb | 508 | } else for (i = 0; i < n; i++) { |
0bf142d2 MW |
509 | parseaddr(&aihint, DA(&bindhosts)[i], bindsvc, 0, &ailist); |
510 | pushaddrs(&cw.me, ailist); | |
511 | freeaddrinfo(ailist); | |
5c8525cb MW |
512 | } |
513 | if (bindsvc) { | |
8fc71d5a | 514 | cw.f |= cwf_port; |
5c8525cb MW |
515 | n = DA_LEN(&cw.me); |
516 | cw.sfv = xmalloc(n*sizeof(*cw.sfv)); | |
8fc71d5a | 517 | } |
3912d793 MW |
518 | } |
519 | ||
5c8525cb MW |
520 | n = DA_LEN(&peerhosts); |
521 | if (n) { | |
0bf142d2 MW |
522 | aihint.ai_socktype = SOCK_STREAM; |
523 | aihint.ai_protocol = IPPROTO_TCP; | |
524 | aihint.ai_flags = AI_ADDRCONFIG; | |
5c8525cb | 525 | for (i = 0; i < n; i++) { |
0bf142d2 MW |
526 | parseaddr(&aihint, DA(&peerhosts)[i], 0, 0, &ailist); |
527 | pushaddrs(&cw.peer, ailist); | |
528 | freeaddrinfo(ailist); | |
5c8525cb | 529 | } |
d66e33f0 | 530 | if (!DA_LEN(&cw.peer)) die(1, "no usable peer addresses"); |
5c8525cb | 531 | } |
07212ba4 | 532 | |
3912d793 | 533 | if (connhost) { |
0bf142d2 MW |
534 | aihint.ai_socktype = SOCK_STREAM; |
535 | aihint.ai_protocol = IPPROTO_TCP; | |
536 | aihint.ai_flags = AI_ADDRCONFIG; | |
537 | parseaddr(&aihint, connhost, 0, paf_parse, &ailist); | |
538 | ||
539 | for (ai = ailist; ai; ai = ai->ai_next) { | |
540 | if ((fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP)) >= 0 && | |
2fb1657b | 541 | !initsock(fd, ai->ai_family) && |
0bf142d2 MW |
542 | (!DA_LEN(&bindhosts) || |
543 | !bind(fd, &bindaddr.sa, addrsz(&bindaddr))) && | |
544 | !connect(fd, ai->ai_addr, ai->ai_addrlen)) | |
545 | goto conn_tcp; | |
546 | if (fd >= 0) close(fd); | |
547 | } | |
548 | die(1, "couldn't connect to TCP server: %s", strerror(errno)); | |
549 | conn_tcp: | |
3912d793 MW |
550 | if (nonblockify(fd) || cloexec(fd)) |
551 | die(1, "couldn't connect to TCP server: %s", strerror(errno)); | |
552 | } | |
553 | ||
d66e33f0 | 554 | aihint.ai_family = AF_INET; |
0bf142d2 MW |
555 | aihint.ai_socktype = SOCK_DGRAM; |
556 | aihint.ai_protocol = IPPROTO_UDP; | |
557 | aihint.ai_flags = AI_ADDRCONFIG | AI_PASSIVE; | |
d66e33f0 MW |
558 | parseaddr(&aihint, argv[optind], 0, paf_parse, &ailist); |
559 | for (ai = ailist; ai && !knownafp(ai->ai_family); ai = ai->ai_next); | |
560 | if (!ai) die(1, "no usable addresses returned for `%s'", argv[optind]); | |
0bf142d2 | 561 | if ((fd_udp = socket(ai->ai_family, SOCK_DGRAM, IPPROTO_UDP)) < 0 || |
2fb1657b | 562 | initsock(fd_udp, ai->ai_family) || |
3912d793 | 563 | nonblockify(fd_udp) || cloexec(fd_udp) || |
07212ba4 | 564 | setsockopt(fd_udp, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)) || |
565 | setsockopt(fd_udp, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len)) || | |
0bf142d2 | 566 | bind(fd_udp, ai->ai_addr, ai->ai_addrlen)) |
07212ba4 | 567 | die(1, "couldn't set up UDP socket: %s", strerror(errno)); |
0bf142d2 | 568 | freeaddrinfo(ailist); |
d66e33f0 | 569 | aihint.ai_family = ai->ai_family; |
0bf142d2 MW |
570 | aihint.ai_flags = AI_ADDRCONFIG; |
571 | parseaddr(&aihint, argv[optind + 1], 0, paf_parse, &ailist); | |
572 | for (ai = ailist; ai; ai = ai->ai_next) | |
573 | if (!connect(fd_udp, ai->ai_addr, ai->ai_addrlen)) goto conn_udp; | |
574 | die(1, "couldn't set up UDP socket: %s", strerror(errno)); | |
575 | conn_udp: | |
07212ba4 | 576 | |
3912d793 MW |
577 | if (bindsvc) dolisten(); |
578 | else if (connhost) dofwd(fd, fd); | |
579 | else dofwd(STDIN_FILENO, STDOUT_FILENO); | |
07212ba4 | 580 | |
c14225f6 MW |
581 | for (;;) { |
582 | if (sel_select(&sel) && errno != EINTR) | |
583 | die(1, "select failed: %s", strerror(errno)); | |
584 | } | |
07212ba4 | 585 | return (0); |
586 | } | |
587 | ||
588 | /*----- That's all, folks -------------------------------------------------*/ |