Commit | Line | Data |
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d3372da9 | 1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client | |
302a2600 | 3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | /* XXX: Implement SOCKS proxyability */ | |
20 | ||
21 | #ifdef HAVE_CONFIG_H | |
22 | #include <config.h> | |
23 | #endif | |
24 | #include <string.h> | |
25 | #include <stdlib.h> | |
26 | #include <unistd.h> | |
27 | #include <fcntl.h> | |
28 | #include <sys/ioctl.h> | |
29 | #include <sys/socket.h> | |
30 | #include <sys/un.h> | |
72a7835e | 31 | #include <sys/select.h> |
d3372da9 | 32 | #include <arpa/inet.h> |
33 | #include <netinet/in.h> | |
34 | #include <netdb.h> | |
35 | #include <sys/signal.h> | |
7ab36fbd | 36 | #include <sys/stat.h> /* For rebindunix() */ |
d3372da9 | 37 | #ifdef HAVE_LINUX_SOCKIOS_H |
38 | #include <linux/sockios.h> | |
39 | #endif | |
40 | #include <errno.h> | |
41 | #include <net/if.h> | |
42 | ||
43 | #include "conf.h" | |
44 | #include "net.h" | |
45 | #include "module.h" | |
46 | #include "log.h" | |
47 | #include "utils.h" | |
48 | #include "sysevents.h" | |
49 | ||
50 | static struct configvar myvars[] = | |
51 | { | |
d9f89ef5 | 52 | /** The network mode to use. Currently supported values are 0 for |
53 | * active mode and 1 for passive mode. In the future, SOCKS5 proxy | |
54 | * support may be added. */ | |
d3372da9 | 55 | {CONF_VAR_INT, "mode", {.num = 0}}, |
d9f89ef5 | 56 | /** Set the SO_REUSEADDR socket option on listening sockets, so |
57 | * that dead TCP connections waiting for timeout are ignored. */ | |
347d6d76 | 58 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
d9f89ef5 | 59 | /** Overrides the IPv4 address reported to other clients in active |
60 | * mode. Useful for servers behind NAT routers. If both this and | |
61 | * net.publicif are unspecified the address of the hub connection | |
62 | * is used. */ | |
d3372da9 | 63 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
d9f89ef5 | 64 | /** Specifies an interface name from which to fetch the IPv4 |
65 | * address reported to other clients in active mode. If both this | |
66 | * and net.visibleipv4 are unspecified the address of the hub | |
67 | * connection is used. */ | |
d3372da9 | 68 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
b020fb3d | 69 | /* Diffserv should be supported on IPv4, too, but I don't know the |
70 | * API to do that. */ | |
d9f89ef5 | 71 | /** The Diffserv value to use on IPv6 connections when the |
72 | * minimize cost TOS value is used (see the TOS VALUES | |
73 | * section). */ | |
b020fb3d | 74 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
d9f89ef5 | 75 | /** The Diffserv value to use on IPv6 connections when the |
76 | * maximize reliability TOS value is used (see the TOS VALUES | |
77 | * section). */ | |
b020fb3d | 78 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
d9f89ef5 | 79 | /** The Diffserv value to use on IPv6 connections when the |
80 | * maximize throughput TOS value is used (see the TOS VALUES | |
81 | * section). */ | |
b020fb3d | 82 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
d9f89ef5 | 83 | /** The Diffserv value to use on IPv6 connections when the |
84 | * minimize delay TOS value is used (see the TOS VALUES | |
85 | * section). */ | |
b020fb3d | 86 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
d3372da9 | 87 | {CONF_VAR_END} |
88 | }; | |
89 | ||
02a705ad FT |
90 | #define UFD_SOCK 0 |
91 | #define UFD_PIPE 1 | |
92 | #define UFD_LISTEN 2 | |
93 | ||
94 | struct scons { | |
95 | struct scons *n, *p; | |
96 | struct socket *s; | |
97 | }; | |
98 | ||
99 | struct ufd { | |
100 | struct ufd *next, *prev; | |
101 | int fd; | |
102 | int type; | |
103 | int ignread; | |
104 | struct socket *sk; | |
105 | union { | |
106 | struct { | |
107 | int family; | |
108 | int type; | |
109 | struct sockaddr *remote; | |
110 | socklen_t remotelen; | |
111 | struct { | |
112 | uid_t uid; | |
113 | gid_t gid; | |
114 | } ucred; | |
115 | } s; | |
116 | struct { | |
117 | struct lport *lp; | |
118 | int family; | |
119 | } l; | |
120 | } d; | |
121 | }; | |
122 | ||
123 | static struct ufd *ufds = NULL; | |
124 | static struct scons *rbatch, *wbatch, *cbatch; | |
d3372da9 | 125 | int numsocks = 0; |
126 | ||
127 | /* XXX: Get autoconf for all this... */ | |
128 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) | |
129 | { | |
130 | struct sockaddr_in *ipv4; | |
131 | struct configvar *var; | |
132 | void *bufend; | |
133 | int sock; | |
134 | struct ifconf conf; | |
135 | struct ifreq *ifr, req; | |
136 | char *pif; | |
137 | ||
138 | if(af == AF_INET) | |
139 | { | |
140 | var = confgetvar("net", "visibleipv4"); | |
141 | if(var->val.ipv4.s_addr != 0) | |
142 | { | |
143 | ipv4 = smalloc(sizeof(*ipv4)); | |
144 | ipv4->sin_family = AF_INET; | |
145 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; | |
146 | *addr = (struct sockaddr *)ipv4; | |
147 | *lenbuf = sizeof(*ipv4); | |
148 | return(0); | |
149 | } | |
bcb73bb3 | 150 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 | 151 | { |
152 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); | |
153 | return(-1); | |
154 | } | |
6fb0c6ac | 155 | if(!strcmp(pif, "")) |
156 | return(1); | |
d3372da9 | 157 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
158 | return(-1); | |
159 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); | |
160 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
161 | { | |
162 | free(conf.ifc_buf); | |
163 | close(sock); | |
164 | return(-1); | |
165 | } | |
166 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; | |
167 | ipv4 = NULL; | |
168 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) | |
169 | { | |
1315d02a | 170 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac | 171 | continue; |
d3372da9 | 172 | memset(&req, 0, sizeof(req)); |
173 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); | |
174 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) | |
6fb0c6ac | 175 | break; |
176 | if(!(req.ifr_flags & IFF_UP)) | |
d3372da9 | 177 | { |
6fb0c6ac | 178 | flog(LOG_WARNING, "public interface is down"); |
179 | break; | |
d3372da9 | 180 | } |
6fb0c6ac | 181 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 | 182 | { |
6fb0c6ac | 183 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
184 | break; | |
d3372da9 | 185 | } |
6fb0c6ac | 186 | ipv4 = smalloc(sizeof(*ipv4)); |
187 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); | |
188 | break; | |
d3372da9 | 189 | } |
bcb73bb3 | 190 | free(conf.ifc_buf); |
d3372da9 | 191 | close(sock); |
192 | if(ipv4 != NULL) | |
193 | { | |
194 | *addr = (struct sockaddr *)ipv4; | |
195 | *lenbuf = sizeof(*ipv4); | |
196 | return(0); | |
197 | } | |
198 | errno = ENETDOWN; | |
199 | return(-1); | |
200 | } | |
6fb0c6ac | 201 | return(1); |
d3372da9 | 202 | } |
203 | ||
02a705ad | 204 | static struct socket *newsock1(int dgram) |
d3372da9 | 205 | { |
206 | struct socket *new; | |
207 | ||
02a705ad FT |
208 | new = memset(smalloc(sizeof(*new)), 0, sizeof(*new)); |
209 | new->refcount = 1; | |
d3372da9 | 210 | new->state = -1; |
02a705ad | 211 | new->dgram = dgram; |
d3372da9 | 212 | numsocks++; |
213 | return(new); | |
214 | } | |
215 | ||
02a705ad FT |
216 | static struct socket *sockpair(int dgram) |
217 | { | |
218 | struct socket *s1, *s2; | |
219 | ||
220 | s1 = newsock1(dgram); | |
221 | s2 = newsock1(dgram); | |
222 | s1->back = s2; | |
223 | s2->back = s1; | |
224 | putsock(s2); | |
225 | return(s1); | |
226 | } | |
227 | ||
228 | static void sksetstate(struct socket *sk, int state) | |
229 | { | |
230 | sk->state = state; | |
231 | sk->back->state = state; | |
232 | } | |
233 | ||
234 | static void closeufd(struct ufd *ufd) | |
235 | { | |
236 | if(ufd->fd != -1) | |
237 | close(ufd->fd); | |
238 | ufd->fd = -1; | |
239 | } | |
240 | ||
241 | static void freeufd(struct ufd *ufd) | |
242 | { | |
243 | if(ufd->next != NULL) | |
244 | ufd->next->prev = ufd->prev; | |
245 | if(ufd->prev != NULL) | |
246 | ufd->prev->next = ufd->next; | |
247 | if(ufd == ufds) | |
248 | ufds = ufd->next; | |
249 | closeufd(ufd); | |
5afb0d14 FT |
250 | if(ufd->sk != NULL) |
251 | putsock(ufd->sk); | |
02a705ad FT |
252 | if(ufd->type == UFD_SOCK) { |
253 | if(ufd->d.s.remote != NULL) | |
254 | free(ufd->d.s.remote); | |
255 | } | |
256 | free(ufd); | |
257 | } | |
258 | ||
259 | static struct ufd *mkufd(int fd, int type, struct socket *sk) | |
260 | { | |
261 | struct ufd *ufd; | |
262 | ||
263 | ufd = memset(smalloc(sizeof(*ufd)), 0, sizeof(*ufd)); | |
264 | ufd->fd = fd; | |
5afb0d14 | 265 | ufd->type = type; |
02a705ad FT |
266 | if(sk != NULL) { |
267 | getsock(ufd->sk = sk); | |
268 | sk->ufd = ufd; | |
269 | } | |
270 | if(type == UFD_SOCK) { | |
271 | ufd->d.s.ucred.uid = -1; | |
272 | ufd->d.s.ucred.gid = -1; | |
273 | } | |
274 | ufd->next = ufds; | |
275 | if(ufds) | |
276 | ufds->prev = ufd; | |
277 | ufds = ufd; | |
278 | return(ufd); | |
279 | } | |
280 | ||
281 | static struct ufd *dupufd(struct ufd *ufd) | |
282 | { | |
283 | struct ufd *nufd; | |
284 | struct socket *nsk; | |
285 | ||
286 | if(ufd->sk != NULL) | |
287 | nsk = sockpair(ufd->sk->dgram); | |
288 | else | |
289 | nsk = NULL; | |
290 | nufd = mkufd(ufd->fd, ufd->type, nsk); | |
291 | if(nsk != NULL) | |
292 | putsock(nsk); | |
293 | if((nufd->fd = dup(ufd->fd)) < 0) | |
294 | { | |
295 | flog(LOG_WARNING, "could not dup() fd: %s", strerror(errno)); | |
296 | freeufd(nufd); | |
297 | return(NULL); | |
298 | } | |
5afb0d14 | 299 | sksetstate(nsk, SOCK_EST); |
02a705ad FT |
300 | if(ufd->type == UFD_SOCK) { |
301 | nufd->d.s.family = ufd->d.s.family; | |
302 | nufd->d.s.type = ufd->d.s.type; | |
303 | nufd->d.s.ucred.uid = ufd->d.s.ucred.uid; | |
304 | nufd->d.s.ucred.gid = ufd->d.s.ucred.gid; | |
305 | if(ufd->d.s.remote != NULL) | |
306 | nufd->d.s.remote = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, nufd->d.s.remotelen = ufd->d.s.remotelen); | |
307 | } else if(ufd->type == UFD_LISTEN) { | |
308 | nufd->d.l.family = ufd->d.l.family; | |
309 | } | |
310 | return(nufd); | |
311 | } | |
312 | ||
d3372da9 | 313 | static struct socket *mksock(int domain, int type) |
314 | { | |
315 | int fd; | |
02a705ad FT |
316 | struct socket *sk; |
317 | struct ufd *ufd; | |
d3372da9 | 318 | |
319 | if((fd = socket(domain, type, 0)) < 0) | |
320 | { | |
321 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
322 | return(NULL); | |
323 | } | |
02a705ad FT |
324 | sk = sockpair(type == SOCK_DGRAM); |
325 | ufd = mkufd(fd, UFD_SOCK, sk); | |
326 | ufd->d.s.family = domain; | |
327 | ufd->d.s.type = type; | |
d3372da9 | 328 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 329 | return(sk); |
d3372da9 | 330 | } |
331 | ||
332 | struct socket *wrapsock(int fd) | |
333 | { | |
02a705ad FT |
334 | struct socket *sk; |
335 | struct ufd *ufd; | |
d3372da9 | 336 | |
02a705ad FT |
337 | sk = sockpair(0); |
338 | ufd = mkufd(fd, UFD_PIPE, sk->back); | |
339 | sksetstate(sk, SOCK_EST); | |
d3372da9 | 340 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 341 | return(sk); |
d3372da9 | 342 | } |
343 | ||
344 | void getsock(struct socket *sk) | |
345 | { | |
346 | sk->refcount++; | |
347 | } | |
348 | ||
02a705ad | 349 | static void freesock(struct socket *sk) |
d3372da9 | 350 | { |
351 | struct dgrambuf *buf; | |
352 | ||
02a705ad FT |
353 | if(sk->dgram) { |
354 | while((buf = sk->buf.d.f) != NULL) { | |
355 | sk->buf.d.f = buf->next; | |
356 | freedgbuf(buf); | |
d3372da9 | 357 | } |
02a705ad FT |
358 | } else { |
359 | if(sk->buf.s.buf != NULL) | |
360 | free(sk->buf.s.buf); | |
361 | } | |
362 | free(sk); | |
363 | numsocks--; | |
364 | } | |
365 | ||
366 | void putsock(struct socket *sk) | |
367 | { | |
7dddb551 FT |
368 | struct socket *back; |
369 | ||
02a705ad FT |
370 | if(--(sk->refcount) < 0) { |
371 | flog(LOG_CRIT, "BUG: socket refcount < 0"); | |
372 | abort(); | |
373 | } | |
374 | if((sk->refcount == 0) && (sk->back->refcount == 0)) { | |
7dddb551 | 375 | back = sk->back; |
02a705ad | 376 | freesock(sk); |
7dddb551 | 377 | freesock(back); |
02a705ad FT |
378 | } |
379 | } | |
380 | ||
381 | static void linksock(struct scons **list, struct socket *sk) | |
382 | { | |
383 | struct scons *sc; | |
384 | ||
385 | for(sc = *list; sc != NULL; sc = sc->n) { | |
386 | if(sc->s == sk) | |
387 | return; | |
d3372da9 | 388 | } |
02a705ad FT |
389 | sc = smalloc(sizeof(*sc)); |
390 | getsock(sc->s = sk); | |
391 | sc->n = *list; | |
392 | sc->p = NULL; | |
393 | if(*list) | |
394 | (*list)->p = sc; | |
395 | *list = sc; | |
d3372da9 | 396 | } |
397 | ||
336539c2 | 398 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
399 | { | |
02a705ad FT |
400 | if(size == 0) |
401 | return; | |
402 | if(sk->dgram) { | |
336539c2 | 403 | /* XXX */ |
02a705ad FT |
404 | } else { |
405 | sizebuf(&sk->buf.s.buf, &sk->buf.s.bufsize, sk->buf.s.datasize + size, 1, 1); | |
406 | memmove(sk->buf.s.buf + size, sk->buf.s.buf, sk->buf.s.datasize); | |
407 | memcpy(sk->buf.s.buf, buf, size); | |
408 | sk->buf.s.datasize += size; | |
409 | linksock(&rbatch, sk); | |
336539c2 | 410 | } |
02a705ad FT |
411 | } |
412 | ||
413 | /* Read as the preterite of `read' */ | |
414 | void sockread(struct socket *sk) | |
415 | { | |
5afb0d14 FT |
416 | if((sockgetdatalen(sk) == 0) && (sk->eos == 1)) |
417 | linksock(&rbatch, sk); | |
02a705ad FT |
418 | linksock(&wbatch, sk->back); |
419 | } | |
420 | ||
421 | void freedgbuf(struct dgrambuf *dg) | |
422 | { | |
423 | if(dg->data != NULL) | |
424 | free(dg->data); | |
425 | if(dg->addr != NULL) | |
426 | free(dg->addr); | |
427 | free(dg); | |
428 | } | |
429 | ||
430 | struct dgrambuf *sockgetdgbuf(struct socket *sk) | |
431 | { | |
432 | struct dgrambuf *dbuf; | |
433 | ||
434 | if((dbuf = sk->buf.d.f) == NULL) | |
435 | return(NULL); | |
436 | sk->buf.d.f = dbuf->next; | |
437 | if(dbuf->next == NULL) | |
438 | sk->buf.d.l = NULL; | |
439 | dbuf->next = NULL; | |
440 | sockread(sk); | |
441 | return(dbuf); | |
336539c2 | 442 | } |
443 | ||
d3372da9 | 444 | void *sockgetinbuf(struct socket *sk, size_t *size) |
445 | { | |
446 | void *buf; | |
447 | struct dgrambuf *dbuf; | |
448 | ||
02a705ad FT |
449 | if(sk->dgram) { |
450 | dbuf = sockgetdgbuf(sk); | |
d3372da9 | 451 | buf = dbuf->data; |
452 | *size = dbuf->size; | |
453 | free(dbuf->addr); | |
454 | free(dbuf); | |
02a705ad FT |
455 | } else { |
456 | if((sk->buf.s.buf == NULL) || (sk->buf.s.datasize == 0)) | |
457 | { | |
458 | *size = 0; | |
459 | return(NULL); | |
460 | } | |
461 | buf = sk->buf.s.buf; | |
462 | *size = sk->buf.s.datasize; | |
463 | sk->buf.s.buf = NULL; | |
464 | sk->buf.s.bufsize = sk->buf.s.datasize = 0; | |
465 | sockread(sk); | |
d3372da9 | 466 | } |
02a705ad FT |
467 | return(buf); |
468 | } | |
469 | ||
470 | void sockqueue(struct socket *sk, void *data, size_t size) | |
471 | { | |
472 | struct dgrambuf *new; | |
473 | struct sockaddr *remote; | |
474 | socklen_t remotelen; | |
475 | ||
476 | if(size == 0) | |
477 | return; | |
478 | if(sk->state == SOCK_STL) | |
479 | return; | |
480 | if(sk->dgram) { | |
481 | if(sockpeeraddr(sk, &remote, &remotelen)) | |
482 | return; | |
483 | new = smalloc(sizeof(*new)); | |
484 | new->next = NULL; | |
485 | memcpy(new->data = smalloc(size), data, new->size = size); | |
486 | new->addr = remote; | |
487 | new->addrlen = remotelen; | |
488 | if(sk->back->buf.d.l == NULL) | |
489 | { | |
490 | sk->back->buf.d.l = sk->back->buf.d.f = new; | |
491 | } else { | |
492 | sk->back->buf.d.l->next = new; | |
493 | sk->back->buf.d.l = new; | |
494 | } | |
495 | } else { | |
496 | sizebuf(&(sk->back->buf.s.buf), &(sk->back->buf.s.bufsize), sk->back->buf.s.datasize + size, 1, 1); | |
497 | memcpy(sk->back->buf.s.buf + sk->back->buf.s.datasize, data, size); | |
498 | sk->back->buf.s.datasize += size; | |
499 | } | |
500 | linksock(&rbatch, sk->back); | |
501 | } | |
502 | ||
503 | void sockqueuedg(struct socket *sk, struct dgrambuf *dg) | |
504 | { | |
505 | if(sk->state == SOCK_STL) { | |
506 | freedgbuf(dg); | |
507 | return; | |
508 | } | |
509 | if(!sk->dgram) { | |
510 | flog(LOG_ERR, "BUG: sockqueuedg called on non-dgram socket"); | |
511 | freedgbuf(dg); | |
512 | return; | |
513 | } | |
514 | dg->next = NULL; | |
515 | if(sk->back->buf.d.l == NULL) | |
516 | { | |
517 | sk->back->buf.d.l = sk->back->buf.d.f = dg; | |
518 | } else { | |
519 | sk->back->buf.d.l->next = dg; | |
520 | sk->back->buf.d.l = dg; | |
521 | } | |
522 | linksock(&rbatch, sk->back); | |
523 | } | |
524 | ||
525 | void sockeos(struct socket *sk) | |
526 | { | |
527 | sksetstate(sk, SOCK_STL); | |
528 | if(sk->back->eos == 0) | |
529 | sk->back->eos = 1; | |
530 | linksock(&rbatch, sk->back); | |
531 | } | |
532 | ||
533 | static void sockerror(struct socket *sk, int en) | |
534 | { | |
535 | sksetstate(sk, SOCK_STL); | |
536 | if(sk->back->errcb != NULL) | |
537 | sk->back->errcb(sk->back, en, sk->back->data); | |
d3372da9 | 538 | } |
539 | ||
02a705ad | 540 | static void recvcmsg(struct ufd *ufd, struct msghdr *msg) |
9e5f2b29 | 541 | { |
542 | struct cmsghdr *cmsg; | |
9e5f2b29 | 543 | |
544 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
545 | { | |
a8c5ada6 | 546 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 547 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
548 | { | |
a8c5ada6 | 549 | struct ucred *cred; |
02a705ad | 550 | if(ufd->d.s.ucred.uid == -1) |
9e5f2b29 | 551 | { |
552 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
02a705ad FT |
553 | ufd->d.s.ucred.uid = cred->uid; |
554 | ufd->d.s.ucred.gid = cred->gid; | |
9e5f2b29 | 555 | } |
556 | } | |
a8c5ada6 | 557 | #endif |
9e5f2b29 | 558 | } |
559 | } | |
560 | ||
02a705ad FT |
561 | static int ufddgram(struct ufd *ufd) |
562 | { | |
563 | int dgram; | |
564 | ||
565 | if(ufd->type == UFD_SOCK) { | |
566 | dgram = ufd->d.s.type == SOCK_DGRAM; | |
567 | } else if(ufd->type == UFD_PIPE) { | |
568 | dgram = 0; | |
569 | } else { | |
570 | flog(LOG_ERR, "BUG: calling ufddgram on ufd of bad type %i", ufd->type); | |
571 | return(-1); | |
572 | } | |
573 | if(ufd->sk == NULL) { | |
574 | flog(LOG_ERR, "BUG: calling ufddgram on socketless ufd (type %i)", ufd->type); | |
575 | return(-1); | |
576 | } | |
577 | if(dgram != ufd->sk->dgram) { | |
578 | flog(LOG_ERR, "BUG: ufd/socket dgram value mismatch"); | |
579 | return(-1); | |
580 | } | |
581 | return(dgram); | |
582 | } | |
583 | ||
584 | static void sockrecv(struct ufd *ufd) | |
d3372da9 | 585 | { |
586 | int ret, inq; | |
02a705ad | 587 | int dgram; |
d3372da9 | 588 | struct dgrambuf *dbuf; |
9e5f2b29 | 589 | struct msghdr msg; |
590 | char cbuf[65536]; | |
591 | struct iovec bufvec; | |
02a705ad | 592 | void *buf; |
d3372da9 | 593 | |
9e5f2b29 | 594 | memset(&msg, 0, sizeof(msg)); |
595 | msg.msg_iov = &bufvec; | |
596 | msg.msg_iovlen = 1; | |
597 | msg.msg_control = cbuf; | |
598 | msg.msg_controllen = sizeof(cbuf); | |
02a705ad FT |
599 | if((dgram = ufddgram(ufd)) < 0) |
600 | return; | |
601 | if(dgram) { | |
9e5f2b29 | 602 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
02a705ad | 603 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
d3372da9 | 604 | { |
605 | /* I don't really know what could go wrong here, so let's | |
606 | * assume it's transient. */ | |
02a705ad | 607 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), ufd->fd); |
d3372da9 | 608 | return; |
609 | } | |
9e5f2b29 | 610 | #else |
611 | inq = 65536; | |
612 | #endif | |
d3372da9 | 613 | dbuf = smalloc(sizeof(*dbuf)); |
614 | dbuf->data = smalloc(inq); | |
615 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 616 | msg.msg_name = dbuf->addr; |
617 | msg.msg_namelen = dbuf->addrlen; | |
618 | bufvec.iov_base = dbuf->data; | |
619 | bufvec.iov_len = inq; | |
02a705ad | 620 | ret = recvmsg(ufd->fd, &msg, 0); |
9e5f2b29 | 621 | dbuf->addrlen = msg.msg_namelen; |
d3372da9 | 622 | if(ret < 0) |
623 | { | |
02a705ad | 624 | freedgbuf(dbuf); |
d3372da9 | 625 | if((errno == EINTR) || (errno == EAGAIN)) |
626 | return; | |
02a705ad FT |
627 | closeufd(ufd); |
628 | sockerror(ufd->sk, errno); | |
d3372da9 | 629 | return; |
630 | } | |
9e5f2b29 | 631 | if(msg.msg_flags & MSG_CTRUNC) |
632 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
633 | else | |
02a705ad | 634 | recvcmsg(ufd, &msg); |
d3372da9 | 635 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
636 | * have EOF), but rather an empty packet. I don't know if any | |
637 | * other potential DGRAM protocols might have an EOF | |
638 | * condition, so let's play safe. */ | |
639 | if(ret == 0) | |
640 | { | |
02a705ad FT |
641 | freedgbuf(dbuf); |
642 | if((ufd->type != UFD_SOCK) || !((ufd->d.s.family == AF_INET) || (ufd->d.s.family == AF_INET6))) | |
d3372da9 | 643 | { |
02a705ad FT |
644 | sockeos(ufd->sk); |
645 | closeufd(ufd); | |
d3372da9 | 646 | } |
647 | return; | |
648 | } | |
649 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
650 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
651 | dbuf->next = NULL; | |
02a705ad FT |
652 | sockqueuedg(ufd->sk, dbuf); |
653 | } else { | |
654 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
655 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
656 | * how to read the inqueue size on other OSs */ | |
657 | if(ufd->type == UFD_SOCK) { | |
658 | if(ioctl(ufd->fd, SIOCINQ, &inq)) | |
659 | { | |
660 | /* I don't really know what could go wrong here, so let's | |
661 | * assume it's transient. */ | |
662 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), ufd->fd); | |
663 | inq = 2048; | |
664 | } | |
665 | } else { | |
666 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
667 | inq = 65536; | |
668 | } | |
669 | #else | |
670 | inq = 2048; | |
671 | #endif | |
672 | if(inq > 65536) | |
673 | inq = 65536; | |
674 | /* This part could be optimized by telling the kernel to read | |
675 | * directly into ufd->sk->back->buf, but that would be uglier | |
676 | * by not using the socket function interface. */ | |
677 | buf = smalloc(inq); | |
678 | if(ufd->type == UFD_SOCK) | |
679 | { | |
680 | bufvec.iov_base = buf; | |
681 | bufvec.iov_len = inq; | |
682 | ret = recvmsg(ufd->fd, &msg, 0); | |
683 | } else { | |
684 | ret = read(ufd->fd, buf, inq); | |
685 | msg.msg_controllen = 0; | |
686 | msg.msg_flags = 0; | |
687 | } | |
688 | if(ret < 0) | |
689 | { | |
690 | free(buf); | |
691 | if((errno == EINTR) || (errno == EAGAIN)) | |
692 | return; | |
693 | closeufd(ufd); | |
694 | sockerror(ufd->sk, errno); | |
695 | return; | |
696 | } | |
697 | if(msg.msg_flags & MSG_CTRUNC) | |
698 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
d3372da9 | 699 | else |
02a705ad FT |
700 | recvcmsg(ufd, &msg); |
701 | if(ret == 0) | |
702 | { | |
703 | free(buf); | |
704 | closeufd(ufd); | |
705 | sockeos(ufd->sk); | |
706 | return; | |
707 | } | |
708 | sockqueue(ufd->sk, buf, ret); | |
709 | free(buf); | |
d3372da9 | 710 | } |
711 | } | |
712 | ||
02a705ad | 713 | static void sockflush(struct ufd *ufd) |
d3372da9 | 714 | { |
715 | int ret; | |
716 | struct dgrambuf *dbuf; | |
02a705ad | 717 | int dgram; |
d3372da9 | 718 | |
02a705ad FT |
719 | if((dgram = ufddgram(ufd)) < 0) |
720 | return; | |
721 | if(dgram) { | |
722 | dbuf = sockgetdgbuf(ufd->sk); | |
723 | sendto(ufd->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
724 | freedgbuf(dbuf); | |
725 | } else { | |
726 | if(ufd->type == UFD_SOCK) | |
727 | ret = send(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
d3372da9 | 728 | else |
02a705ad FT |
729 | ret = write(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize); |
730 | if(ret < 0) { | |
d3372da9 | 731 | /* For now, assume transient error, since |
732 | * the socket is polled for errors */ | |
02a705ad | 733 | return; |
d3372da9 | 734 | } |
02a705ad FT |
735 | if(ret > 0) { |
736 | memmove(ufd->sk->buf.s.buf, ((char *)ufd->sk->buf.s.buf) + ret, ufd->sk->buf.s.datasize -= ret); | |
737 | sockread(ufd->sk); | |
d3372da9 | 738 | } |
d3372da9 | 739 | } |
740 | } | |
741 | ||
742 | void closesock(struct socket *sk) | |
743 | { | |
02a705ad | 744 | /* |
b870805e | 745 | struct sockaddr_un *un; |
746 | ||
e0cbc756 | 747 | if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX)) |
b870805e | 748 | { |
7ab36fbd | 749 | if((sk->state == SOCK_LST) && strchr(un->sun_path, '/')) |
b870805e | 750 | { |
751 | if(unlink(un->sun_path)) | |
7ab36fbd | 752 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); |
b870805e | 753 | } |
754 | } | |
02a705ad FT |
755 | */ |
756 | sksetstate(sk, SOCK_STL); | |
757 | sockeos(sk); | |
d3372da9 | 758 | } |
759 | ||
760 | size_t sockgetdatalen(struct socket *sk) | |
761 | { | |
762 | struct dgrambuf *b; | |
763 | size_t ret; | |
764 | ||
02a705ad | 765 | if(sk->dgram) { |
d3372da9 | 766 | ret = 0; |
02a705ad | 767 | for(b = sk->buf.d.f; b != NULL; b = b->next) |
d3372da9 | 768 | ret += b->size; |
02a705ad FT |
769 | } else { |
770 | ret = sk->buf.s.datasize; | |
d3372da9 | 771 | } |
772 | return(ret); | |
773 | } | |
774 | ||
775 | size_t sockqueuesize(struct socket *sk) | |
776 | { | |
02a705ad | 777 | return(sockgetdatalen(sk->back)); |
d3372da9 | 778 | } |
779 | ||
d3372da9 | 780 | /* |
7ab36fbd | 781 | * Seriously, I don't know if it's naughty or not to remove |
782 | * pre-existing Unix sockets. | |
783 | */ | |
02a705ad | 784 | static int rebindunix(struct ufd *ufd, struct sockaddr *name, socklen_t namelen) |
7ab36fbd | 785 | { |
786 | struct sockaddr_un *un; | |
787 | struct stat sb; | |
788 | ||
02a705ad | 789 | if((ufd->d.l.family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
7ab36fbd | 790 | return(-1); |
791 | un = (struct sockaddr_un *)name; | |
792 | if(stat(un->sun_path, &sb)) | |
793 | return(-1); | |
794 | if(!S_ISSOCK(sb.st_mode)) | |
795 | return(-1); | |
796 | if(unlink(un->sun_path)) | |
797 | return(-1); | |
02a705ad | 798 | if(bind(ufd->fd, name, namelen) < 0) |
7ab36fbd | 799 | return(-1); |
800 | return(0); | |
801 | } | |
802 | ||
f96d0914 FT |
803 | void closelport(struct lport *lp) |
804 | { | |
805 | freeufd(lp->ufd); | |
806 | } | |
807 | ||
7ab36fbd | 808 | /* |
d3372da9 | 809 | * The difference between netcslisten() and netcslistenlocal() is that |
810 | * netcslistenlocal() always listens on the local host, instead of | |
811 | * following proxy/passive mode directions. It is suitable for eg. the | |
812 | * UI channel, while the file sharing networks should, naturally, use | |
813 | * netcslisten() instead. | |
814 | */ | |
815 | ||
02a705ad | 816 | struct lport *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
d3372da9 | 817 | { |
02a705ad FT |
818 | struct lport *lp; |
819 | struct ufd *ufd; | |
820 | int fd; | |
66c517d2 | 821 | int intbuf; |
d3372da9 | 822 | |
823 | /* I don't know if this is actually correct (it probably isn't), | |
824 | * but since, at on least Linux systems, PF_* are specifically | |
825 | * #define'd to their AF_* counterparts, it allows for a severely | |
826 | * smoother implementation. If it breaks something on your | |
827 | * platform, please tell me so. | |
828 | */ | |
02a705ad | 829 | if((fd = socket(name->sa_family, type, 0)) < 0) |
d3372da9 | 830 | return(NULL); |
02a705ad | 831 | if(confgetint("net", "reuseaddr")) { |
687b2ee2 | 832 | intbuf = 1; |
02a705ad | 833 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
687b2ee2 | 834 | } |
02a705ad | 835 | ufd = mkufd(fd, UFD_LISTEN, NULL); |
02a705ad | 836 | ufd->d.l.family = name->sa_family; |
f96d0914 FT |
837 | lp = memset(smalloc(sizeof(*lp)), 0, sizeof(*lp)); |
838 | lp->ufd = ufd; | |
839 | ufd->d.l.lp = lp; | |
02a705ad FT |
840 | if((bind(fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(ufd, name, namelen) < 0))) { |
841 | freeufd(ufd); | |
d3372da9 | 842 | return(NULL); |
843 | } | |
02a705ad | 844 | if(listen(fd, 16) < 0) |
d3372da9 | 845 | { |
02a705ad | 846 | freeufd(ufd); |
d3372da9 | 847 | return(NULL); |
848 | } | |
02a705ad FT |
849 | lp->acceptcb = func; |
850 | lp->data = data; | |
851 | return(lp); | |
d3372da9 | 852 | } |
853 | ||
02a705ad | 854 | struct lport *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
c23acc61 | 855 | { |
856 | if(confgetint("net", "mode") == 1) | |
857 | { | |
858 | errno = EOPNOTSUPP; | |
859 | return(NULL); | |
860 | } | |
c23acc61 | 861 | if(confgetint("net", "mode") == 0) |
862 | return(netcslistenlocal(type, name, namelen, func, data)); | |
863 | errno = EOPNOTSUPP; | |
864 | return(NULL); | |
865 | } | |
866 | ||
02a705ad | 867 | struct lport *netcstcplisten(int port, int local, void (*func)(struct lport *, struct socket *, void *), void *data) |
0a1bc5b1 | 868 | { |
869 | struct sockaddr_in addr; | |
870 | #ifdef HAVE_IPV6 | |
871 | struct sockaddr_in6 addr6; | |
872 | #endif | |
02a705ad FT |
873 | struct lport *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct lport *, struct socket *, void *), void *); |
874 | struct lport *ret; | |
0a1bc5b1 | 875 | |
876 | if(local) | |
877 | csfunc = netcslistenlocal; | |
878 | else | |
879 | csfunc = netcslisten; | |
880 | #ifdef HAVE_IPV6 | |
881 | memset(&addr6, 0, sizeof(addr6)); | |
882 | addr6.sin6_family = AF_INET6; | |
883 | addr6.sin6_port = htons(port); | |
884 | addr6.sin6_addr = in6addr_any; | |
885 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
886 | return(ret); | |
887 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
888 | return(NULL); | |
889 | #endif | |
890 | memset(&addr, 0, sizeof(addr)); | |
891 | addr.sin_family = AF_INET; | |
892 | addr.sin_port = htons(port); | |
893 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
894 | } | |
895 | ||
d3372da9 | 896 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
897 | { | |
898 | struct socket *sk; | |
899 | int mode; | |
900 | ||
901 | mode = confgetint("net", "mode"); | |
902 | if((mode == 0) || (mode == 1)) | |
903 | { | |
904 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
905 | return(NULL); | |
02a705ad | 906 | if(bind(sk->ufd->fd, name, namelen) < 0) |
d3372da9 | 907 | { |
908 | putsock(sk); | |
909 | return(NULL); | |
910 | } | |
02a705ad FT |
911 | sksetstate(sk, SOCK_EST); |
912 | return(sk->back); | |
d3372da9 | 913 | } |
914 | errno = EOPNOTSUPP; | |
915 | return(NULL); | |
916 | } | |
917 | ||
02a705ad | 918 | struct socket *netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
d3372da9 | 919 | { |
02a705ad | 920 | struct ufd *nufd; |
d3372da9 | 921 | |
02a705ad | 922 | nufd = dupufd(sk->back->ufd); |
5afb0d14 | 923 | getsock(sk = nufd->sk->back); |
02a705ad FT |
924 | memcpy(nufd->d.s.remote = smalloc(addrlen), addr, nufd->d.s.remotelen = addrlen); |
925 | nufd->ignread = 1; | |
926 | return(sk); | |
d3372da9 | 927 | } |
928 | ||
cab0b442 | 929 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 930 | { |
931 | struct socket *sk; | |
932 | int mode; | |
933 | ||
934 | mode = confgetint("net", "mode"); | |
935 | if((mode == 0) || (mode == 1)) | |
936 | { | |
937 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
938 | return(NULL); | |
02a705ad FT |
939 | memcpy(sk->ufd->d.s.remote = smalloc(addrlen), addr, sk->ufd->d.s.remotelen = addrlen); |
940 | sk->back->conncb = func; | |
941 | sk->back->data = data; | |
942 | if(!connect(sk->ufd->fd, addr, addrlen)) | |
d3372da9 | 943 | { |
02a705ad FT |
944 | sksetstate(sk, SOCK_EST); |
945 | linksock(&cbatch, sk->back); | |
946 | return(sk->back); | |
d3372da9 | 947 | } |
948 | if(errno == EINPROGRESS) | |
949 | { | |
02a705ad FT |
950 | sksetstate(sk, SOCK_SYN); |
951 | return(sk->back); | |
d3372da9 | 952 | } |
953 | putsock(sk); | |
954 | return(NULL); | |
955 | } | |
956 | errno = EOPNOTSUPP; | |
957 | return(NULL); | |
958 | } | |
959 | ||
02a705ad | 960 | static void acceptunix(struct ufd *ufd) |
9e5f2b29 | 961 | { |
962 | int buf; | |
963 | ||
964 | buf = 1; | |
a8c5ada6 | 965 | #if UNIX_AUTH_STYLE == 1 |
02a705ad FT |
966 | if(setsockopt(ufd->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
967 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", ufd->fd, strerror(errno)); | |
a8c5ada6 | 968 | #elif UNIX_AUTH_STYLE == 2 |
02a705ad | 969 | if(getpeereid(ufd->fd, &ufd->d.s.ucred.uid, &ufd->d.s.ucred.gid) < 0) |
a8c5ada6 | 970 | { |
02a705ad FT |
971 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", ufd->fd, strerror(errno)); |
972 | ufd->d.s.ucred.uid = -1; | |
973 | ufd->d.s.ucred.gid = -1; | |
a8c5ada6 | 974 | } |
975 | #endif | |
9e5f2b29 | 976 | } |
977 | ||
f96d0914 FT |
978 | static void runbatches(void) |
979 | { | |
980 | struct scons *sc, *nsc; | |
981 | ||
982 | for(sc = cbatch, cbatch = NULL; sc; sc = nsc) { | |
983 | nsc = sc->n; | |
5afb0d14 FT |
984 | if(sc->s->conncb != NULL) |
985 | sc->s->conncb(sc->s, 0, sc->s->data); | |
f96d0914 FT |
986 | free(sc); |
987 | } | |
988 | for(sc = rbatch, rbatch = NULL; sc; sc = nsc) { | |
989 | nsc = sc->n; | |
5afb0d14 FT |
990 | if(sc->s->readcb != NULL) |
991 | sc->s->readcb(sc->s, sc->s->data); | |
992 | if((sockgetdatalen(sc->s) == 0) && (sc->s->eos == 1)) { | |
993 | if(sc->s->errcb != NULL) | |
994 | sc->s->errcb(sc->s, 0, sc->s->data); | |
995 | sc->s->eos = 2; | |
996 | } | |
f96d0914 FT |
997 | free(sc); |
998 | } | |
999 | for(sc = wbatch, wbatch = NULL; sc; sc = nsc) { | |
1000 | nsc = sc->n; | |
5afb0d14 FT |
1001 | if(sc->s->writecb != NULL) |
1002 | sc->s->writecb(sc->s, sc->s->data); | |
f96d0914 FT |
1003 | free(sc); |
1004 | } | |
1005 | } | |
1006 | ||
5afb0d14 FT |
1007 | static void cleansocks(void) |
1008 | { | |
1009 | struct ufd *ufd, *next; | |
1010 | ||
1011 | for(ufd = ufds; ufd != NULL; ufd = next) { | |
1012 | next = ufd->next; | |
1013 | if(ufd->sk && (sockgetdatalen(ufd->sk) == 0)) { | |
1014 | if(ufd->sk->eos == 1) { | |
1015 | ufd->sk->eos = 2; | |
1016 | closeufd(ufd); | |
1017 | closesock(ufd->sk); | |
1018 | } | |
1019 | if((ufd->sk->refcount == 1) && (ufd->sk->back->refcount == 0)) { | |
1020 | freeufd(ufd); | |
1021 | continue; | |
1022 | } | |
1023 | } | |
1024 | } | |
1025 | } | |
1026 | ||
d3372da9 | 1027 | int pollsocks(int timeout) |
1028 | { | |
02a705ad | 1029 | int ret; |
eaa35963 | 1030 | socklen_t retlen; |
72a7835e FT |
1031 | int newfd, maxfd; |
1032 | fd_set rfds, wfds, efds; | |
5afb0d14 | 1033 | struct ufd *ufd, *nufd; |
02a705ad | 1034 | struct socket *nsk; |
d3372da9 | 1035 | struct sockaddr_storage ss; |
1036 | socklen_t sslen; | |
72a7835e | 1037 | struct timeval tv; |
d3372da9 | 1038 | |
5afb0d14 | 1039 | cleansocks(); |
72a7835e FT |
1040 | FD_ZERO(&rfds); |
1041 | FD_ZERO(&wfds); | |
1042 | FD_ZERO(&efds); | |
02a705ad FT |
1043 | for(maxfd = 0, ufd = ufds; ufd != NULL; ufd = ufd->next) { |
1044 | if(ufd->fd < 0) | |
d3372da9 | 1045 | continue; |
02a705ad FT |
1046 | if(!ufd->ignread) |
1047 | FD_SET(ufd->fd, &rfds); | |
1048 | if(ufd->sk != NULL) { | |
1049 | if(sockgetdatalen(ufd->sk) > 0) | |
1050 | FD_SET(ufd->fd, &wfds); | |
1051 | else if(ufd->sk->state == SOCK_SYN) | |
1052 | FD_SET(ufd->fd, &wfds); | |
1053 | } | |
1054 | FD_SET(ufd->fd, &efds); | |
1055 | if(ufd->fd > maxfd) | |
1056 | maxfd = ufd->fd; | |
d3372da9 | 1057 | } |
5afb0d14 FT |
1058 | if(rbatch || wbatch || cbatch) |
1059 | timeout = 0; | |
72a7835e FT |
1060 | tv.tv_sec = timeout / 1000; |
1061 | tv.tv_usec = (timeout % 1000) * 1000; | |
1062 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
02a705ad FT |
1063 | if(ret < 0) { |
1064 | if(errno != EINTR) { | |
72a7835e | 1065 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 1066 | /* To avoid CPU hogging in case it's bad, which it |
1067 | * probably is. */ | |
1068 | sleep(1); | |
1069 | } | |
d3372da9 | 1070 | return(1); |
1071 | } | |
5afb0d14 | 1072 | for(ufd = ufds; ufd != NULL; ufd = ufd->next) { |
02a705ad FT |
1073 | if(ufd->sk < 0) |
1074 | continue; | |
1075 | if(ufd->type == UFD_LISTEN) { | |
1076 | if(FD_ISSET(ufd->fd, &rfds)) { | |
d3372da9 | 1077 | sslen = sizeof(ss); |
02a705ad FT |
1078 | if((newfd = accept(ufd->fd, (struct sockaddr *)&ss, &sslen)) < 0) { |
1079 | if(ufd->d.l.lp->errcb != NULL) | |
1080 | ufd->d.l.lp->errcb(ufd->d.l.lp, errno, ufd->d.l.lp->data); | |
cab0b442 | 1081 | } |
02a705ad FT |
1082 | nsk = sockpair(0); |
1083 | nufd = mkufd(newfd, UFD_SOCK, nsk); | |
1084 | nufd->d.s.family = ufd->d.l.family; | |
1085 | sksetstate(nsk, SOCK_EST); | |
1086 | memcpy(nufd->d.s.remote = smalloc(sslen), &ss, sslen); | |
1087 | nufd->d.s.remotelen = sslen; | |
9e5f2b29 | 1088 | if(ss.ss_family == PF_UNIX) |
02a705ad FT |
1089 | acceptunix(nufd); |
1090 | if(ufd->d.l.lp->acceptcb != NULL) | |
5afb0d14 | 1091 | ufd->d.l.lp->acceptcb(ufd->d.l.lp, nsk->back, ufd->d.l.lp->data); |
02a705ad | 1092 | putsock(nsk); |
d3372da9 | 1093 | } |
02a705ad | 1094 | if(FD_ISSET(ufd->fd, &efds)) { |
d3372da9 | 1095 | retlen = sizeof(ret); |
02a705ad FT |
1096 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
1097 | if(ufd->d.l.lp->errcb != NULL) | |
1098 | ufd->d.l.lp->errcb(ufd->d.l.lp, ret, ufd->d.l.lp->data); | |
d3372da9 | 1099 | continue; |
1100 | } | |
02a705ad FT |
1101 | } else { |
1102 | if(ufd->sk->state == SOCK_SYN) { | |
1103 | if(FD_ISSET(ufd->fd, &efds)) { | |
1104 | retlen = sizeof(ret); | |
1105 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1106 | if(ufd->sk->back->conncb != NULL) | |
1107 | ufd->sk->back->conncb(ufd->sk->back, ret, ufd->sk->back->data); | |
1108 | closeufd(ufd); | |
1109 | continue; | |
1110 | } | |
1111 | if(FD_ISSET(ufd->fd, &rfds) || FD_ISSET(ufd->fd, &wfds)) { | |
1112 | sksetstate(ufd->sk, SOCK_EST); | |
1113 | linksock(&cbatch, ufd->sk->back); | |
1114 | } | |
1115 | } else if(ufd->sk->state == SOCK_EST) { | |
1116 | if(FD_ISSET(ufd->fd, &efds)) { | |
1117 | retlen = sizeof(ret); | |
1118 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1119 | sockerror(ufd->sk, ret); | |
1120 | closeufd(ufd); | |
1121 | continue; | |
1122 | } | |
1123 | if(FD_ISSET(ufd->fd, &rfds)) | |
1124 | sockrecv(ufd); | |
5afb0d14 FT |
1125 | if(ufd->fd == -1) |
1126 | continue; | |
02a705ad FT |
1127 | if(FD_ISSET(ufd->fd, &wfds)) |
1128 | sockflush(ufd); | |
d3372da9 | 1129 | } |
d3372da9 | 1130 | } |
d3372da9 | 1131 | } |
f96d0914 | 1132 | runbatches(); |
5afb0d14 | 1133 | cleansocks(); |
d3372da9 | 1134 | return(1); |
1135 | } | |
1136 | ||
f96d0914 FT |
1137 | static struct ufd *getskufd(struct socket *sk) |
1138 | { | |
1139 | while(1) { | |
1140 | if(sk->back->ufd != NULL) | |
1141 | return(sk->back->ufd); | |
1142 | if((sk = sk->back->pnext) == NULL) | |
1143 | break; | |
1144 | } | |
1145 | return(NULL); | |
1146 | } | |
1147 | ||
d3372da9 | 1148 | int socksettos(struct socket *sk, int tos) |
1149 | { | |
b020fb3d | 1150 | int buf; |
f96d0914 | 1151 | struct ufd *ufd; |
b020fb3d | 1152 | |
f96d0914 FT |
1153 | ufd = getskufd(sk); |
1154 | if(ufd->type != UFD_SOCK) { | |
1155 | errno = EOPNOTSUPP; | |
1156 | return(-1); | |
1157 | } | |
1158 | if(ufd->d.s.family == AF_UNIX) | |
7ab36fbd | 1159 | return(0); /* Unix sockets are always perfect. :) */ |
f96d0914 | 1160 | if(ufd->d.s.family == AF_INET) |
d3372da9 | 1161 | { |
b020fb3d | 1162 | switch(tos) |
1163 | { | |
b198bed6 | 1164 | case 0: |
1165 | buf = 0; | |
1166 | break; | |
b020fb3d | 1167 | case SOCK_TOS_MINCOST: |
18c1ae1d | 1168 | buf = 0x02; |
b020fb3d | 1169 | break; |
1170 | case SOCK_TOS_MAXREL: | |
18c1ae1d | 1171 | buf = 0x04; |
b020fb3d | 1172 | break; |
1173 | case SOCK_TOS_MAXTP: | |
18c1ae1d | 1174 | buf = 0x08; |
b020fb3d | 1175 | break; |
1176 | case SOCK_TOS_MINDELAY: | |
18c1ae1d | 1177 | buf = 0x10; |
b020fb3d | 1178 | break; |
1179 | default: | |
1180 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1181 | return(-1); | |
1182 | } | |
f96d0914 | 1183 | if(setsockopt(ufd->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1184 | { |
1185 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1186 | return(-1); | |
1187 | } | |
1188 | return(0); | |
1189 | } | |
f96d0914 | 1190 | if(ufd->d.s.family == AF_INET6) |
b020fb3d | 1191 | { |
1192 | switch(tos) | |
1193 | { | |
b198bed6 | 1194 | case 0: |
1195 | buf = 0; | |
b020fb3d | 1196 | case SOCK_TOS_MINCOST: |
1197 | buf = confgetint("net", "diffserv-mincost"); | |
1198 | break; | |
1199 | case SOCK_TOS_MAXREL: | |
1200 | buf = confgetint("net", "diffserv-maxrel"); | |
1201 | break; | |
1202 | case SOCK_TOS_MAXTP: | |
1203 | buf = confgetint("net", "diffserv-maxtp"); | |
1204 | break; | |
1205 | case SOCK_TOS_MINDELAY: | |
1206 | buf = confgetint("net", "diffserv-mindelay"); | |
1207 | break; | |
1208 | default: | |
1209 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1210 | return(-1); | |
1211 | } | |
1212 | /* | |
1213 | On Linux, the API IPv6 flow label management doesn't seem to | |
1214 | be entirely complete, so I guess this will have to wait. | |
1215 | ||
1216 | if(setsockopt(...) < 0) | |
1217 | { | |
1218 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1219 | return(-1); | |
1220 | } | |
1221 | */ | |
1222 | return(0); | |
1223 | } | |
f96d0914 | 1224 | flog(LOG_WARNING, "could not set TOS on sock of family %i", ufd->d.s.family); |
d3372da9 | 1225 | return(1); |
1226 | } | |
1227 | ||
1228 | struct resolvedata | |
1229 | { | |
1230 | int fd; | |
1231 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1232 | void *data; | |
1233 | struct sockaddr_storage addr; | |
1234 | int addrlen; | |
1235 | }; | |
1236 | ||
1237 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1238 | { | |
1239 | static char buf[80]; | |
1240 | int ret; | |
1241 | struct sockaddr_in *ipv4; | |
1242 | ||
1243 | if(!status) | |
1244 | { | |
1245 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1246 | { | |
b4d16e90 | 1247 | errno = ENOENT; |
d3372da9 | 1248 | data->callback(NULL, 0, data->data); |
1249 | } else { | |
1250 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1251 | memcpy(&ipv4->sin_addr, buf, 4); | |
1252 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1253 | } | |
1254 | } else { | |
b4d16e90 | 1255 | errno = ENOENT; |
d3372da9 | 1256 | data->callback(NULL, 0, data->data); |
1257 | } | |
1258 | close(data->fd); | |
1259 | free(data); | |
1260 | } | |
1261 | ||
1262 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1263 | { | |
1264 | int i; | |
1265 | char *p; | |
1266 | int port; | |
1267 | int pfd[2]; | |
1268 | pid_t child; | |
1269 | struct resolvedata *rdata; | |
1270 | struct sockaddr_in ipv4; | |
1271 | struct hostent *he; | |
1272 | sigset_t sigset; | |
1273 | ||
1274 | /* IPv4 */ | |
1275 | port = -1; | |
1276 | if((p = strchr(addr, ':')) != NULL) | |
1277 | { | |
1278 | *p = 0; | |
1279 | port = atoi(p + 1); | |
1280 | } | |
1281 | ipv4.sin_family = AF_INET; | |
1282 | ipv4.sin_port = htons(port); | |
1283 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1284 | { | |
1285 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1286 | } else { | |
1287 | sigemptyset(&sigset); | |
1288 | sigaddset(&sigset, SIGCHLD); | |
1289 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1290 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1291 | { | |
1292 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1293 | return(-1); | |
1294 | } | |
1295 | if(child == 0) | |
1296 | { | |
1297 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1298 | for(i = 3; i < FD_SETSIZE; i++) | |
1299 | { | |
1300 | if(i != pfd[1]) | |
1301 | close(i); | |
1302 | } | |
1303 | signal(SIGALRM, SIG_DFL); | |
1304 | alarm(30); | |
1305 | if((he = gethostbyname(addr)) == NULL) | |
1306 | exit(1); | |
1307 | write(pfd[1], he->h_addr_list[0], 4); | |
1308 | exit(0); | |
1309 | } else { | |
1310 | close(pfd[1]); | |
1311 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1312 | rdata = smalloc(sizeof(*rdata)); | |
1313 | rdata->fd = pfd[0]; | |
1314 | rdata->callback = callback; | |
1315 | rdata->data = data; | |
1316 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1317 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1318 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1319 | return(1); | |
1320 | } | |
1321 | } | |
1322 | return(0); | |
1323 | } | |
1324 | ||
f96d0914 | 1325 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
d3372da9 | 1326 | { |
1327 | socklen_t len; | |
1328 | struct sockaddr_storage name; | |
1329 | ||
1330 | *namebuf = NULL; | |
f96d0914 | 1331 | if(fd < 0) |
d3372da9 | 1332 | return(-1); |
1333 | len = sizeof(name); | |
f96d0914 | 1334 | if(getsockname(fd, (struct sockaddr *)&name, &len) < 0) |
d3372da9 | 1335 | { |
6fb0c6ac | 1336 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1337 | return(-1); |
1338 | } | |
1339 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1340 | if(lenbuf != NULL) |
1341 | *lenbuf = len; | |
d3372da9 | 1342 | return(0); |
1343 | } | |
1344 | ||
f96d0914 FT |
1345 | int lstgetlocalname(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
1346 | { | |
1347 | struct ufd *ufd; | |
1348 | ||
1349 | ufd = lp->ufd; | |
1350 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1351 | } | |
1352 | ||
1353 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1354 | { | |
1355 | struct ufd *ufd; | |
1356 | ||
1357 | ufd = getskufd(sk); | |
1358 | if(ufd->type != UFD_SOCK) { | |
1359 | errno = EOPNOTSUPP; | |
1360 | return(-1); | |
1361 | } | |
1362 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1363 | } | |
1364 | ||
eaa35963 | 1365 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1366 | { | |
1367 | if(dst->sa_family != src->sa_family) | |
1368 | { | |
1369 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1370 | return; | |
1371 | } | |
1372 | switch(src->sa_family) | |
1373 | { | |
1374 | case AF_INET: | |
1375 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1376 | break; | |
1377 | case AF_INET6: | |
1378 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1379 | break; | |
1380 | default: | |
1381 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1382 | break; | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1387 | { |
6fb0c6ac | 1388 | int ret; |
eaa35963 | 1389 | socklen_t plen; |
1390 | struct sockaddr *pname; | |
1391 | ||
1392 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1393 | { | |
1394 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1395 | return(-1); | |
1396 | } | |
1397 | if(ret) | |
1398 | return(0); | |
1399 | sethostaddr(addr, pname); | |
1400 | free(pname); | |
1401 | return(0); | |
1402 | } | |
1403 | ||
f96d0914 | 1404 | static int getremotename(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
eaa35963 | 1405 | { |
d3372da9 | 1406 | socklen_t len; |
6fb0c6ac | 1407 | struct sockaddr *name; |
f96d0914 FT |
1408 | |
1409 | switch(confgetint("net", "mode")) { | |
d3372da9 | 1410 | case 0: |
1411 | *namebuf = NULL; | |
f96d0914 | 1412 | if(!getlocalname(fd, &name, &len)) { |
6fb0c6ac | 1413 | *namebuf = name; |
1414 | *lenbuf = len; | |
eaa35963 | 1415 | makepublic(name); |
6fb0c6ac | 1416 | return(0); |
1417 | } | |
1418 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1419 | return(-1); | |
d3372da9 | 1420 | case 1: |
1421 | errno = EOPNOTSUPP; | |
1422 | return(-1); | |
1423 | default: | |
1424 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1425 | errno = EOPNOTSUPP; | |
1426 | return(-1); | |
1427 | } | |
1428 | } | |
1429 | ||
f96d0914 FT |
1430 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1431 | { | |
1432 | struct ufd *ufd; | |
1433 | ||
1434 | ufd = getskufd(sk); | |
1435 | if(ufd->type != UFD_SOCK) { | |
1436 | errno = EOPNOTSUPP; | |
1437 | return(-1); | |
1438 | } | |
1439 | if(ufd->fd < 0) { | |
1440 | errno = EBADF; | |
1441 | return(-1); | |
1442 | } | |
1443 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1444 | } | |
1445 | ||
1446 | int lstgetremotename(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1447 | { | |
1448 | struct ufd *ufd; | |
1449 | ||
1450 | ufd = lp->ufd; | |
1451 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1452 | } | |
1453 | ||
d29853b1 | 1454 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1455 | { | |
1456 | struct sockaddr *name1, *name2; | |
1457 | socklen_t len1, len2; | |
f96d0914 FT |
1458 | struct ufd *ufd1, *ufd2; |
1459 | ||
1460 | ufd1 = getskufd(sk); | |
1461 | ufd2 = getskufd(sk2); | |
1462 | if((ufd1->type != UFD_SOCK) || (ufd2->type != UFD_SOCK)) { | |
1463 | errno = EOPNOTSUPP; | |
1464 | return(-1); | |
1465 | } | |
1466 | if(ufd1->d.s.family != ufd2->d.s.family) | |
1467 | { | |
1468 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); | |
1469 | return(-1); | |
1470 | } | |
1471 | if(getremotename(ufd1->fd, &name1, &len1)) | |
1472 | return(-1); | |
1473 | if(getremotename(ufd2->fd, &name2, &len2)) { | |
1474 | free(name1); | |
1475 | return(-1); | |
1476 | } | |
1477 | sethostaddr(name1, name2); | |
1478 | free(name2); | |
1479 | *namebuf = name1; | |
1480 | *lenbuf = len1; | |
1481 | return(0); | |
1482 | } | |
1483 | ||
1484 | int lstgetremotename2(struct lport *lp, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1485 | { | |
1486 | struct sockaddr *name1, *name2; | |
1487 | socklen_t len1, len2; | |
1488 | struct ufd *ufd1, *ufd2; | |
d29853b1 | 1489 | |
f96d0914 FT |
1490 | ufd1 = lp->ufd; |
1491 | ufd2 = getskufd(sk2); | |
1492 | if(ufd2->type != UFD_SOCK) { | |
1493 | errno = EOPNOTSUPP; | |
1494 | return(-1); | |
1495 | } | |
1496 | if(ufd1->d.s.family != ufd2->d.s.family) | |
d29853b1 | 1497 | { |
f96d0914 | 1498 | flog(LOG_ERR, "using lstgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); |
d29853b1 | 1499 | return(-1); |
1500 | } | |
f96d0914 | 1501 | if(getremotename(ufd1->fd, &name1, &len1)) |
d29853b1 | 1502 | return(-1); |
f96d0914 | 1503 | if(getremotename(ufd2->fd, &name2, &len2)) { |
d29853b1 | 1504 | free(name1); |
1505 | return(-1); | |
1506 | } | |
1507 | sethostaddr(name1, name2); | |
1508 | free(name2); | |
1509 | *namebuf = name1; | |
1510 | *lenbuf = len1; | |
1511 | return(0); | |
1512 | } | |
1513 | ||
f96d0914 FT |
1514 | int getucred(struct socket *sk, uid_t *uid, gid_t *gid) |
1515 | { | |
1516 | struct ufd *ufd; | |
1517 | ||
1518 | ufd = getskufd(sk); | |
1519 | if(ufd->type != UFD_SOCK) { | |
1520 | errno = EOPNOTSUPP; | |
1521 | return(-1); | |
1522 | } | |
1523 | if(ufd->d.s.family != AF_UNIX) { | |
1524 | errno = EOPNOTSUPP; | |
1525 | return(-1); | |
1526 | } | |
1527 | *uid = ufd->d.s.ucred.uid; | |
1528 | *gid = ufd->d.s.ucred.gid; | |
1529 | return(0); | |
1530 | } | |
1531 | ||
02a705ad FT |
1532 | void sockblock(struct socket *sk, int block) |
1533 | { | |
f96d0914 FT |
1534 | struct ufd *ufd; |
1535 | ||
1536 | ufd = getskufd(sk); | |
1537 | ufd->ignread = block; | |
1538 | } | |
1539 | ||
1540 | int sockfamily(struct socket *sk) | |
1541 | { | |
1542 | struct ufd *ufd; | |
1543 | ||
1544 | ufd = getskufd(sk); | |
1545 | if(ufd->type != UFD_SOCK) { | |
1546 | errno = EOPNOTSUPP; | |
1547 | return(-1); | |
1548 | } | |
1549 | return(ufd->d.s.family); | |
02a705ad FT |
1550 | } |
1551 | ||
1552 | int sockpeeraddr(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1553 | { | |
f96d0914 FT |
1554 | struct ufd *ufd; |
1555 | ||
1556 | ufd = getskufd(sk); | |
1557 | if(ufd->type != UFD_SOCK) { | |
1558 | errno = EOPNOTSUPP; | |
1559 | return(-1); | |
1560 | } | |
1561 | if(ufd->d.s.remote == NULL) | |
1562 | return(-1); | |
1563 | *namebuf = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, ufd->d.s.remotelen); | |
1564 | if(lenbuf != NULL) | |
1565 | *lenbuf = ufd->d.s.remotelen; | |
1566 | return(0); | |
02a705ad FT |
1567 | } |
1568 | ||
1569 | char *formatsockpeer(struct socket *sk) | |
1570 | { | |
1571 | struct sockaddr *name; | |
1572 | socklen_t nlen; | |
1573 | char *ret; | |
1574 | ||
1575 | if(sockpeeraddr(sk, &name, &nlen)) | |
1576 | return(NULL); | |
1577 | ret = formataddress(name, nlen); | |
1578 | free(name); | |
1579 | return(ret); | |
1580 | } | |
1581 | ||
99a28d47 | 1582 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1583 | { | |
1584 | struct sockaddr_un *u1, *u2; | |
1585 | struct sockaddr_in *n1, *n2; | |
1586 | #ifdef HAVE_IPV6 | |
1587 | struct sockaddr_in6 *s1, *s2; | |
1588 | #endif | |
1589 | ||
1590 | if(x->sa_family != y->sa_family) | |
1591 | return(0); | |
1592 | switch(x->sa_family) { | |
1593 | case AF_UNIX: | |
1594 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1595 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1596 | return(0); | |
1597 | break; | |
1598 | case AF_INET: | |
1599 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1600 | if(n1->sin_port != n2->sin_port) | |
1601 | return(0); | |
1602 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1603 | return(0); | |
1604 | break; | |
c8a729d7 | 1605 | #ifdef HAVE_IPV6 |
99a28d47 | 1606 | case AF_INET6: |
1607 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1608 | if(s1->sin6_port != s2->sin6_port) | |
1609 | return(0); | |
1610 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1611 | return(0); | |
1612 | break; | |
c8a729d7 | 1613 | #endif |
99a28d47 | 1614 | } |
1615 | return(1); | |
1616 | } | |
1617 | ||
d3372da9 | 1618 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1619 | { | |
d3372da9 | 1620 | struct sockaddr_in *ipv4; |
1621 | #ifdef HAVE_IPV6 | |
1622 | struct sockaddr_in6 *ipv6; | |
1623 | #endif | |
1624 | static char *ret = NULL; | |
1625 | char buf[1024]; | |
1626 | ||
1627 | if(ret != NULL) | |
1628 | free(ret); | |
1629 | ret = NULL; | |
1630 | switch(arg->sa_family) | |
1631 | { | |
1632 | case AF_UNIX: | |
6a97462e | 1633 | ret = sstrdup("Unix socket"); |
d3372da9 | 1634 | break; |
1635 | case AF_INET: | |
1636 | ipv4 = (struct sockaddr_in *)arg; | |
1637 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1638 | return(NULL); | |
1639 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1640 | break; | |
1641 | #ifdef HAVE_IPV6 | |
1642 | case AF_INET6: | |
1643 | ipv6 = (struct sockaddr_in6 *)arg; | |
1644 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1645 | return(NULL); | |
fc7f7735 | 1646 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1647 | break; |
1648 | #endif | |
1649 | default: | |
1650 | errno = EPFNOSUPPORT; | |
1651 | break; | |
1652 | } | |
1653 | return(ret); | |
1654 | } | |
1655 | ||
1656 | #if 0 | |
1657 | ||
1658 | /* | |
1659 | * It was very nice to use this, but it seems | |
1660 | * to mess things up, so I guess it has to go... :-( | |
1661 | */ | |
1662 | ||
1663 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1664 | { | |
1665 | struct sockaddr *arg; | |
1666 | socklen_t arglen; | |
1667 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1668 | * lowercase letters to 1, so I do this | |
1669 | * instead. */ | |
1670 | struct sockaddr_in *ipv4; | |
1671 | int ret; | |
1672 | ||
1673 | arg = *(struct sockaddr **)(args[0]); | |
1674 | arglen = *(socklen_t *)(args[1]); | |
1675 | switch(arg->sa_family) | |
1676 | { | |
1677 | case AF_UNIX: | |
1678 | UNIX = (struct sockaddr_un *)arg; | |
1679 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1680 | break; | |
1681 | case AF_INET: | |
1682 | ipv4 = (struct sockaddr_in *)arg; | |
1683 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1684 | break; | |
1685 | default: | |
1686 | ret = -1; | |
1687 | errno = EPFNOSUPPORT; | |
1688 | break; | |
1689 | } | |
1690 | return(ret); | |
1691 | } | |
1692 | ||
1693 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1694 | { | |
1695 | if(n > 0) | |
1696 | argtypes[0] = PA_POINTER; | |
1697 | if(n > 1) | |
1698 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1699 | * be an int, so I guess this should be | |
1700 | * safe. */ | |
1701 | return(2); | |
1702 | } | |
1703 | #endif | |
1704 | ||
1705 | static int init(int hup) | |
1706 | { | |
1707 | if(!hup) | |
1708 | { | |
1709 | /* | |
1710 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1711 | { | |
1712 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1713 | return(1); | |
1714 | } | |
1715 | */ | |
1716 | } | |
1717 | return(0); | |
1718 | } | |
1719 | ||
1720 | static void terminate(void) | |
1721 | { | |
f96d0914 FT |
1722 | /* |
1723 | while(ufds != NULL) | |
1724 | freeufd(ufds); | |
1725 | */ | |
d3372da9 | 1726 | } |
1727 | ||
1728 | static struct module me = | |
1729 | { | |
1730 | .name = "net", | |
1731 | .conf = | |
1732 | { | |
1733 | .vars = myvars | |
1734 | }, | |
1735 | .init = init, | |
1736 | .terminate = terminate | |
1737 | }; | |
1738 | ||
1739 | MODULE(me) |