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 | ||
40c21c4f FT |
123 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf); |
124 | ||
02a705ad FT |
125 | static struct ufd *ufds = NULL; |
126 | static struct scons *rbatch, *wbatch, *cbatch; | |
d3372da9 | 127 | int numsocks = 0; |
128 | ||
129 | /* XXX: Get autoconf for all this... */ | |
130 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) | |
131 | { | |
132 | struct sockaddr_in *ipv4; | |
133 | struct configvar *var; | |
134 | void *bufend; | |
135 | int sock; | |
136 | struct ifconf conf; | |
137 | struct ifreq *ifr, req; | |
138 | char *pif; | |
139 | ||
140 | if(af == AF_INET) | |
141 | { | |
142 | var = confgetvar("net", "visibleipv4"); | |
143 | if(var->val.ipv4.s_addr != 0) | |
144 | { | |
145 | ipv4 = smalloc(sizeof(*ipv4)); | |
146 | ipv4->sin_family = AF_INET; | |
147 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; | |
148 | *addr = (struct sockaddr *)ipv4; | |
149 | *lenbuf = sizeof(*ipv4); | |
150 | return(0); | |
151 | } | |
bcb73bb3 | 152 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 | 153 | { |
154 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); | |
155 | return(-1); | |
156 | } | |
6fb0c6ac | 157 | if(!strcmp(pif, "")) |
158 | return(1); | |
d3372da9 | 159 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
160 | return(-1); | |
161 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); | |
162 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
163 | { | |
164 | free(conf.ifc_buf); | |
165 | close(sock); | |
166 | return(-1); | |
167 | } | |
168 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; | |
169 | ipv4 = NULL; | |
170 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) | |
171 | { | |
1315d02a | 172 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac | 173 | continue; |
d3372da9 | 174 | memset(&req, 0, sizeof(req)); |
175 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); | |
176 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) | |
6fb0c6ac | 177 | break; |
178 | if(!(req.ifr_flags & IFF_UP)) | |
d3372da9 | 179 | { |
6fb0c6ac | 180 | flog(LOG_WARNING, "public interface is down"); |
181 | break; | |
d3372da9 | 182 | } |
6fb0c6ac | 183 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 | 184 | { |
6fb0c6ac | 185 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
186 | break; | |
d3372da9 | 187 | } |
6fb0c6ac | 188 | ipv4 = smalloc(sizeof(*ipv4)); |
189 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); | |
190 | break; | |
d3372da9 | 191 | } |
bcb73bb3 | 192 | free(conf.ifc_buf); |
d3372da9 | 193 | close(sock); |
194 | if(ipv4 != NULL) | |
195 | { | |
196 | *addr = (struct sockaddr *)ipv4; | |
197 | *lenbuf = sizeof(*ipv4); | |
198 | return(0); | |
199 | } | |
200 | errno = ENETDOWN; | |
201 | return(-1); | |
202 | } | |
6fb0c6ac | 203 | return(1); |
d3372da9 | 204 | } |
205 | ||
02a705ad | 206 | static struct socket *newsock1(int dgram) |
d3372da9 | 207 | { |
208 | struct socket *new; | |
209 | ||
02a705ad FT |
210 | new = memset(smalloc(sizeof(*new)), 0, sizeof(*new)); |
211 | new->refcount = 1; | |
d3372da9 | 212 | new->state = -1; |
02a705ad | 213 | new->dgram = dgram; |
d3372da9 | 214 | numsocks++; |
215 | return(new); | |
216 | } | |
217 | ||
02a705ad FT |
218 | static struct socket *sockpair(int dgram) |
219 | { | |
220 | struct socket *s1, *s2; | |
221 | ||
222 | s1 = newsock1(dgram); | |
223 | s2 = newsock1(dgram); | |
224 | s1->back = s2; | |
225 | s2->back = s1; | |
226 | putsock(s2); | |
227 | return(s1); | |
228 | } | |
229 | ||
230 | static void sksetstate(struct socket *sk, int state) | |
231 | { | |
232 | sk->state = state; | |
233 | sk->back->state = state; | |
234 | } | |
235 | ||
236 | static void closeufd(struct ufd *ufd) | |
237 | { | |
238 | if(ufd->fd != -1) | |
239 | close(ufd->fd); | |
240 | ufd->fd = -1; | |
241 | } | |
242 | ||
243 | static void freeufd(struct ufd *ufd) | |
244 | { | |
245 | if(ufd->next != NULL) | |
246 | ufd->next->prev = ufd->prev; | |
247 | if(ufd->prev != NULL) | |
248 | ufd->prev->next = ufd->next; | |
249 | if(ufd == ufds) | |
250 | ufds = ufd->next; | |
251 | closeufd(ufd); | |
5afb0d14 FT |
252 | if(ufd->sk != NULL) |
253 | putsock(ufd->sk); | |
02a705ad FT |
254 | if(ufd->type == UFD_SOCK) { |
255 | if(ufd->d.s.remote != NULL) | |
256 | free(ufd->d.s.remote); | |
257 | } | |
258 | free(ufd); | |
259 | } | |
260 | ||
261 | static struct ufd *mkufd(int fd, int type, struct socket *sk) | |
262 | { | |
263 | struct ufd *ufd; | |
264 | ||
265 | ufd = memset(smalloc(sizeof(*ufd)), 0, sizeof(*ufd)); | |
266 | ufd->fd = fd; | |
5afb0d14 | 267 | ufd->type = type; |
02a705ad FT |
268 | if(sk != NULL) { |
269 | getsock(ufd->sk = sk); | |
270 | sk->ufd = ufd; | |
271 | } | |
272 | if(type == UFD_SOCK) { | |
273 | ufd->d.s.ucred.uid = -1; | |
274 | ufd->d.s.ucred.gid = -1; | |
275 | } | |
276 | ufd->next = ufds; | |
277 | if(ufds) | |
278 | ufds->prev = ufd; | |
279 | ufds = ufd; | |
280 | return(ufd); | |
281 | } | |
282 | ||
283 | static struct ufd *dupufd(struct ufd *ufd) | |
284 | { | |
285 | struct ufd *nufd; | |
286 | struct socket *nsk; | |
287 | ||
288 | if(ufd->sk != NULL) | |
289 | nsk = sockpair(ufd->sk->dgram); | |
290 | else | |
291 | nsk = NULL; | |
292 | nufd = mkufd(ufd->fd, ufd->type, nsk); | |
293 | if(nsk != NULL) | |
294 | putsock(nsk); | |
295 | if((nufd->fd = dup(ufd->fd)) < 0) | |
296 | { | |
297 | flog(LOG_WARNING, "could not dup() fd: %s", strerror(errno)); | |
298 | freeufd(nufd); | |
299 | return(NULL); | |
300 | } | |
5afb0d14 | 301 | sksetstate(nsk, SOCK_EST); |
02a705ad FT |
302 | if(ufd->type == UFD_SOCK) { |
303 | nufd->d.s.family = ufd->d.s.family; | |
304 | nufd->d.s.type = ufd->d.s.type; | |
305 | nufd->d.s.ucred.uid = ufd->d.s.ucred.uid; | |
306 | nufd->d.s.ucred.gid = ufd->d.s.ucred.gid; | |
307 | if(ufd->d.s.remote != NULL) | |
308 | nufd->d.s.remote = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, nufd->d.s.remotelen = ufd->d.s.remotelen); | |
309 | } else if(ufd->type == UFD_LISTEN) { | |
310 | nufd->d.l.family = ufd->d.l.family; | |
311 | } | |
312 | return(nufd); | |
313 | } | |
314 | ||
d3372da9 | 315 | static struct socket *mksock(int domain, int type) |
316 | { | |
317 | int fd; | |
02a705ad FT |
318 | struct socket *sk; |
319 | struct ufd *ufd; | |
d3372da9 | 320 | |
321 | if((fd = socket(domain, type, 0)) < 0) | |
322 | { | |
323 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
324 | return(NULL); | |
325 | } | |
02a705ad FT |
326 | sk = sockpair(type == SOCK_DGRAM); |
327 | ufd = mkufd(fd, UFD_SOCK, sk); | |
328 | ufd->d.s.family = domain; | |
329 | ufd->d.s.type = type; | |
d3372da9 | 330 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 331 | return(sk); |
d3372da9 | 332 | } |
333 | ||
334 | struct socket *wrapsock(int fd) | |
335 | { | |
02a705ad FT |
336 | struct socket *sk; |
337 | struct ufd *ufd; | |
d3372da9 | 338 | |
02a705ad FT |
339 | sk = sockpair(0); |
340 | ufd = mkufd(fd, UFD_PIPE, sk->back); | |
341 | sksetstate(sk, SOCK_EST); | |
d3372da9 | 342 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 343 | return(sk); |
d3372da9 | 344 | } |
345 | ||
346 | void getsock(struct socket *sk) | |
347 | { | |
348 | sk->refcount++; | |
349 | } | |
350 | ||
02a705ad | 351 | static void freesock(struct socket *sk) |
d3372da9 | 352 | { |
353 | struct dgrambuf *buf; | |
354 | ||
02a705ad FT |
355 | if(sk->dgram) { |
356 | while((buf = sk->buf.d.f) != NULL) { | |
357 | sk->buf.d.f = buf->next; | |
358 | freedgbuf(buf); | |
d3372da9 | 359 | } |
02a705ad FT |
360 | } else { |
361 | if(sk->buf.s.buf != NULL) | |
362 | free(sk->buf.s.buf); | |
363 | } | |
364 | free(sk); | |
365 | numsocks--; | |
366 | } | |
367 | ||
368 | void putsock(struct socket *sk) | |
369 | { | |
7dddb551 FT |
370 | struct socket *back; |
371 | ||
02a705ad FT |
372 | if(--(sk->refcount) < 0) { |
373 | flog(LOG_CRIT, "BUG: socket refcount < 0"); | |
374 | abort(); | |
375 | } | |
376 | if((sk->refcount == 0) && (sk->back->refcount == 0)) { | |
7dddb551 | 377 | back = sk->back; |
02a705ad | 378 | freesock(sk); |
7dddb551 | 379 | freesock(back); |
02a705ad FT |
380 | } |
381 | } | |
382 | ||
383 | static void linksock(struct scons **list, struct socket *sk) | |
384 | { | |
385 | struct scons *sc; | |
386 | ||
387 | for(sc = *list; sc != NULL; sc = sc->n) { | |
388 | if(sc->s == sk) | |
389 | return; | |
d3372da9 | 390 | } |
02a705ad FT |
391 | sc = smalloc(sizeof(*sc)); |
392 | getsock(sc->s = sk); | |
393 | sc->n = *list; | |
394 | sc->p = NULL; | |
395 | if(*list) | |
396 | (*list)->p = sc; | |
397 | *list = sc; | |
d3372da9 | 398 | } |
399 | ||
336539c2 | 400 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
401 | { | |
02a705ad FT |
402 | if(size == 0) |
403 | return; | |
404 | if(sk->dgram) { | |
336539c2 | 405 | /* XXX */ |
02a705ad FT |
406 | } else { |
407 | sizebuf(&sk->buf.s.buf, &sk->buf.s.bufsize, sk->buf.s.datasize + size, 1, 1); | |
408 | memmove(sk->buf.s.buf + size, sk->buf.s.buf, sk->buf.s.datasize); | |
409 | memcpy(sk->buf.s.buf, buf, size); | |
410 | sk->buf.s.datasize += size; | |
411 | linksock(&rbatch, sk); | |
336539c2 | 412 | } |
02a705ad FT |
413 | } |
414 | ||
415 | /* Read as the preterite of `read' */ | |
416 | void sockread(struct socket *sk) | |
417 | { | |
5afb0d14 FT |
418 | if((sockgetdatalen(sk) == 0) && (sk->eos == 1)) |
419 | linksock(&rbatch, sk); | |
02a705ad FT |
420 | linksock(&wbatch, sk->back); |
421 | } | |
422 | ||
423 | void freedgbuf(struct dgrambuf *dg) | |
424 | { | |
425 | if(dg->data != NULL) | |
426 | free(dg->data); | |
427 | if(dg->addr != NULL) | |
428 | free(dg->addr); | |
429 | free(dg); | |
430 | } | |
431 | ||
432 | struct dgrambuf *sockgetdgbuf(struct socket *sk) | |
433 | { | |
434 | struct dgrambuf *dbuf; | |
435 | ||
436 | if((dbuf = sk->buf.d.f) == NULL) | |
437 | return(NULL); | |
438 | sk->buf.d.f = dbuf->next; | |
439 | if(dbuf->next == NULL) | |
440 | sk->buf.d.l = NULL; | |
441 | dbuf->next = NULL; | |
442 | sockread(sk); | |
443 | return(dbuf); | |
336539c2 | 444 | } |
445 | ||
d3372da9 | 446 | void *sockgetinbuf(struct socket *sk, size_t *size) |
447 | { | |
448 | void *buf; | |
449 | struct dgrambuf *dbuf; | |
450 | ||
02a705ad FT |
451 | if(sk->dgram) { |
452 | dbuf = sockgetdgbuf(sk); | |
d3372da9 | 453 | buf = dbuf->data; |
454 | *size = dbuf->size; | |
455 | free(dbuf->addr); | |
456 | free(dbuf); | |
02a705ad FT |
457 | } else { |
458 | if((sk->buf.s.buf == NULL) || (sk->buf.s.datasize == 0)) | |
459 | { | |
460 | *size = 0; | |
461 | return(NULL); | |
462 | } | |
463 | buf = sk->buf.s.buf; | |
464 | *size = sk->buf.s.datasize; | |
465 | sk->buf.s.buf = NULL; | |
466 | sk->buf.s.bufsize = sk->buf.s.datasize = 0; | |
467 | sockread(sk); | |
d3372da9 | 468 | } |
02a705ad FT |
469 | return(buf); |
470 | } | |
471 | ||
472 | void sockqueue(struct socket *sk, void *data, size_t size) | |
473 | { | |
474 | struct dgrambuf *new; | |
475 | struct sockaddr *remote; | |
476 | socklen_t remotelen; | |
477 | ||
478 | if(size == 0) | |
479 | return; | |
480 | if(sk->state == SOCK_STL) | |
481 | return; | |
482 | if(sk->dgram) { | |
483 | if(sockpeeraddr(sk, &remote, &remotelen)) | |
484 | return; | |
485 | new = smalloc(sizeof(*new)); | |
486 | new->next = NULL; | |
487 | memcpy(new->data = smalloc(size), data, new->size = size); | |
488 | new->addr = remote; | |
489 | new->addrlen = remotelen; | |
490 | if(sk->back->buf.d.l == NULL) | |
491 | { | |
492 | sk->back->buf.d.l = sk->back->buf.d.f = new; | |
493 | } else { | |
494 | sk->back->buf.d.l->next = new; | |
495 | sk->back->buf.d.l = new; | |
496 | } | |
497 | } else { | |
498 | sizebuf(&(sk->back->buf.s.buf), &(sk->back->buf.s.bufsize), sk->back->buf.s.datasize + size, 1, 1); | |
499 | memcpy(sk->back->buf.s.buf + sk->back->buf.s.datasize, data, size); | |
500 | sk->back->buf.s.datasize += size; | |
501 | } | |
502 | linksock(&rbatch, sk->back); | |
503 | } | |
504 | ||
505 | void sockqueuedg(struct socket *sk, struct dgrambuf *dg) | |
506 | { | |
507 | if(sk->state == SOCK_STL) { | |
508 | freedgbuf(dg); | |
509 | return; | |
510 | } | |
511 | if(!sk->dgram) { | |
512 | flog(LOG_ERR, "BUG: sockqueuedg called on non-dgram socket"); | |
513 | freedgbuf(dg); | |
514 | return; | |
515 | } | |
516 | dg->next = NULL; | |
517 | if(sk->back->buf.d.l == NULL) | |
518 | { | |
519 | sk->back->buf.d.l = sk->back->buf.d.f = dg; | |
520 | } else { | |
521 | sk->back->buf.d.l->next = dg; | |
522 | sk->back->buf.d.l = dg; | |
523 | } | |
524 | linksock(&rbatch, sk->back); | |
525 | } | |
526 | ||
40c21c4f | 527 | void sockerror(struct socket *sk, int en) |
02a705ad FT |
528 | { |
529 | sksetstate(sk, SOCK_STL); | |
530 | if(sk->back->errcb != NULL) | |
531 | sk->back->errcb(sk->back, en, sk->back->data); | |
d3372da9 | 532 | } |
533 | ||
02a705ad | 534 | static void recvcmsg(struct ufd *ufd, struct msghdr *msg) |
9e5f2b29 | 535 | { |
536 | struct cmsghdr *cmsg; | |
9e5f2b29 | 537 | |
538 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
539 | { | |
a8c5ada6 | 540 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 541 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
542 | { | |
a8c5ada6 | 543 | struct ucred *cred; |
02a705ad | 544 | if(ufd->d.s.ucred.uid == -1) |
9e5f2b29 | 545 | { |
546 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
02a705ad FT |
547 | ufd->d.s.ucred.uid = cred->uid; |
548 | ufd->d.s.ucred.gid = cred->gid; | |
9e5f2b29 | 549 | } |
550 | } | |
a8c5ada6 | 551 | #endif |
9e5f2b29 | 552 | } |
553 | } | |
554 | ||
02a705ad FT |
555 | static int ufddgram(struct ufd *ufd) |
556 | { | |
557 | int dgram; | |
558 | ||
559 | if(ufd->type == UFD_SOCK) { | |
560 | dgram = ufd->d.s.type == SOCK_DGRAM; | |
561 | } else if(ufd->type == UFD_PIPE) { | |
562 | dgram = 0; | |
563 | } else { | |
564 | flog(LOG_ERR, "BUG: calling ufddgram on ufd of bad type %i", ufd->type); | |
565 | return(-1); | |
566 | } | |
567 | if(ufd->sk == NULL) { | |
568 | flog(LOG_ERR, "BUG: calling ufddgram on socketless ufd (type %i)", ufd->type); | |
569 | return(-1); | |
570 | } | |
571 | if(dgram != ufd->sk->dgram) { | |
572 | flog(LOG_ERR, "BUG: ufd/socket dgram value mismatch"); | |
573 | return(-1); | |
574 | } | |
575 | return(dgram); | |
576 | } | |
577 | ||
578 | static void sockrecv(struct ufd *ufd) | |
d3372da9 | 579 | { |
580 | int ret, inq; | |
02a705ad | 581 | int dgram; |
d3372da9 | 582 | struct dgrambuf *dbuf; |
9e5f2b29 | 583 | struct msghdr msg; |
584 | char cbuf[65536]; | |
585 | struct iovec bufvec; | |
02a705ad | 586 | void *buf; |
d3372da9 | 587 | |
9e5f2b29 | 588 | memset(&msg, 0, sizeof(msg)); |
589 | msg.msg_iov = &bufvec; | |
590 | msg.msg_iovlen = 1; | |
591 | msg.msg_control = cbuf; | |
592 | msg.msg_controllen = sizeof(cbuf); | |
02a705ad FT |
593 | if((dgram = ufddgram(ufd)) < 0) |
594 | return; | |
595 | if(dgram) { | |
9e5f2b29 | 596 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
02a705ad | 597 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
d3372da9 | 598 | { |
599 | /* I don't really know what could go wrong here, so let's | |
600 | * assume it's transient. */ | |
02a705ad | 601 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), ufd->fd); |
d3372da9 | 602 | return; |
603 | } | |
9e5f2b29 | 604 | #else |
605 | inq = 65536; | |
606 | #endif | |
d3372da9 | 607 | dbuf = smalloc(sizeof(*dbuf)); |
608 | dbuf->data = smalloc(inq); | |
609 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 610 | msg.msg_name = dbuf->addr; |
611 | msg.msg_namelen = dbuf->addrlen; | |
612 | bufvec.iov_base = dbuf->data; | |
613 | bufvec.iov_len = inq; | |
02a705ad | 614 | ret = recvmsg(ufd->fd, &msg, 0); |
9e5f2b29 | 615 | dbuf->addrlen = msg.msg_namelen; |
d3372da9 | 616 | if(ret < 0) |
617 | { | |
02a705ad | 618 | freedgbuf(dbuf); |
d3372da9 | 619 | if((errno == EINTR) || (errno == EAGAIN)) |
620 | return; | |
02a705ad FT |
621 | closeufd(ufd); |
622 | sockerror(ufd->sk, errno); | |
d3372da9 | 623 | return; |
624 | } | |
9e5f2b29 | 625 | if(msg.msg_flags & MSG_CTRUNC) |
626 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
627 | else | |
02a705ad | 628 | recvcmsg(ufd, &msg); |
d3372da9 | 629 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
630 | * have EOF), but rather an empty packet. I don't know if any | |
631 | * other potential DGRAM protocols might have an EOF | |
632 | * condition, so let's play safe. */ | |
633 | if(ret == 0) | |
634 | { | |
02a705ad FT |
635 | freedgbuf(dbuf); |
636 | if((ufd->type != UFD_SOCK) || !((ufd->d.s.family == AF_INET) || (ufd->d.s.family == AF_INET6))) | |
d3372da9 | 637 | { |
40c21c4f | 638 | closesock(ufd->sk); |
02a705ad | 639 | closeufd(ufd); |
d3372da9 | 640 | } |
641 | return; | |
642 | } | |
643 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
644 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
645 | dbuf->next = NULL; | |
02a705ad FT |
646 | sockqueuedg(ufd->sk, dbuf); |
647 | } else { | |
648 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
649 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
650 | * how to read the inqueue size on other OSs */ | |
651 | if(ufd->type == UFD_SOCK) { | |
652 | if(ioctl(ufd->fd, SIOCINQ, &inq)) | |
653 | { | |
654 | /* I don't really know what could go wrong here, so let's | |
655 | * assume it's transient. */ | |
656 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), ufd->fd); | |
657 | inq = 2048; | |
658 | } | |
659 | } else { | |
660 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
661 | inq = 65536; | |
662 | } | |
663 | #else | |
664 | inq = 2048; | |
665 | #endif | |
666 | if(inq > 65536) | |
667 | inq = 65536; | |
668 | /* This part could be optimized by telling the kernel to read | |
669 | * directly into ufd->sk->back->buf, but that would be uglier | |
670 | * by not using the socket function interface. */ | |
671 | buf = smalloc(inq); | |
672 | if(ufd->type == UFD_SOCK) | |
673 | { | |
674 | bufvec.iov_base = buf; | |
675 | bufvec.iov_len = inq; | |
676 | ret = recvmsg(ufd->fd, &msg, 0); | |
677 | } else { | |
678 | ret = read(ufd->fd, buf, inq); | |
679 | msg.msg_controllen = 0; | |
680 | msg.msg_flags = 0; | |
681 | } | |
682 | if(ret < 0) | |
683 | { | |
684 | free(buf); | |
685 | if((errno == EINTR) || (errno == EAGAIN)) | |
686 | return; | |
687 | closeufd(ufd); | |
688 | sockerror(ufd->sk, errno); | |
689 | return; | |
690 | } | |
691 | if(msg.msg_flags & MSG_CTRUNC) | |
692 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
d3372da9 | 693 | else |
02a705ad FT |
694 | recvcmsg(ufd, &msg); |
695 | if(ret == 0) | |
696 | { | |
697 | free(buf); | |
698 | closeufd(ufd); | |
40c21c4f | 699 | closesock(ufd->sk); |
02a705ad FT |
700 | return; |
701 | } | |
702 | sockqueue(ufd->sk, buf, ret); | |
703 | free(buf); | |
d3372da9 | 704 | } |
705 | } | |
706 | ||
02a705ad | 707 | static void sockflush(struct ufd *ufd) |
d3372da9 | 708 | { |
709 | int ret; | |
710 | struct dgrambuf *dbuf; | |
02a705ad | 711 | int dgram; |
d3372da9 | 712 | |
02a705ad FT |
713 | if((dgram = ufddgram(ufd)) < 0) |
714 | return; | |
715 | if(dgram) { | |
716 | dbuf = sockgetdgbuf(ufd->sk); | |
717 | sendto(ufd->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
718 | freedgbuf(dbuf); | |
719 | } else { | |
720 | if(ufd->type == UFD_SOCK) | |
721 | ret = send(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
d3372da9 | 722 | else |
02a705ad FT |
723 | ret = write(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize); |
724 | if(ret < 0) { | |
d3372da9 | 725 | /* For now, assume transient error, since |
726 | * the socket is polled for errors */ | |
02a705ad | 727 | return; |
d3372da9 | 728 | } |
02a705ad FT |
729 | if(ret > 0) { |
730 | memmove(ufd->sk->buf.s.buf, ((char *)ufd->sk->buf.s.buf) + ret, ufd->sk->buf.s.datasize -= ret); | |
731 | sockread(ufd->sk); | |
d3372da9 | 732 | } |
d3372da9 | 733 | } |
734 | } | |
735 | ||
736 | void closesock(struct socket *sk) | |
737 | { | |
02a705ad | 738 | sksetstate(sk, SOCK_STL); |
40c21c4f FT |
739 | if(sk->back->eos == 0) |
740 | sk->back->eos = 1; | |
741 | linksock(&rbatch, sk->back); | |
d3372da9 | 742 | } |
743 | ||
744 | size_t sockgetdatalen(struct socket *sk) | |
745 | { | |
746 | struct dgrambuf *b; | |
747 | size_t ret; | |
748 | ||
02a705ad | 749 | if(sk->dgram) { |
d3372da9 | 750 | ret = 0; |
02a705ad | 751 | for(b = sk->buf.d.f; b != NULL; b = b->next) |
d3372da9 | 752 | ret += b->size; |
02a705ad FT |
753 | } else { |
754 | ret = sk->buf.s.datasize; | |
d3372da9 | 755 | } |
756 | return(ret); | |
757 | } | |
758 | ||
759 | size_t sockqueuesize(struct socket *sk) | |
760 | { | |
02a705ad | 761 | return(sockgetdatalen(sk->back)); |
d3372da9 | 762 | } |
763 | ||
d3372da9 | 764 | /* |
7ab36fbd | 765 | * Seriously, I don't know if it's naughty or not to remove |
766 | * pre-existing Unix sockets. | |
767 | */ | |
02a705ad | 768 | static int rebindunix(struct ufd *ufd, struct sockaddr *name, socklen_t namelen) |
7ab36fbd | 769 | { |
770 | struct sockaddr_un *un; | |
771 | struct stat sb; | |
772 | ||
02a705ad | 773 | if((ufd->d.l.family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
7ab36fbd | 774 | return(-1); |
775 | un = (struct sockaddr_un *)name; | |
776 | if(stat(un->sun_path, &sb)) | |
777 | return(-1); | |
778 | if(!S_ISSOCK(sb.st_mode)) | |
779 | return(-1); | |
780 | if(unlink(un->sun_path)) | |
781 | return(-1); | |
02a705ad | 782 | if(bind(ufd->fd, name, namelen) < 0) |
7ab36fbd | 783 | return(-1); |
784 | return(0); | |
785 | } | |
786 | ||
f96d0914 FT |
787 | void closelport(struct lport *lp) |
788 | { | |
40c21c4f FT |
789 | struct ufd *ufd; |
790 | struct sockaddr_un *un; | |
791 | ||
792 | ufd = lp->ufd; | |
793 | if((ufd->d.l.family == AF_UNIX) && !getlocalname(ufd->fd, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX) && strchr(un->sun_path, '/')) { | |
794 | if(unlink(un->sun_path)) | |
795 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); | |
796 | } | |
f96d0914 FT |
797 | freeufd(lp->ufd); |
798 | } | |
799 | ||
7ab36fbd | 800 | /* |
d3372da9 | 801 | * The difference between netcslisten() and netcslistenlocal() is that |
802 | * netcslistenlocal() always listens on the local host, instead of | |
803 | * following proxy/passive mode directions. It is suitable for eg. the | |
804 | * UI channel, while the file sharing networks should, naturally, use | |
805 | * netcslisten() instead. | |
806 | */ | |
807 | ||
02a705ad | 808 | struct lport *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
d3372da9 | 809 | { |
02a705ad FT |
810 | struct lport *lp; |
811 | struct ufd *ufd; | |
812 | int fd; | |
66c517d2 | 813 | int intbuf; |
d3372da9 | 814 | |
815 | /* I don't know if this is actually correct (it probably isn't), | |
816 | * but since, at on least Linux systems, PF_* are specifically | |
817 | * #define'd to their AF_* counterparts, it allows for a severely | |
818 | * smoother implementation. If it breaks something on your | |
819 | * platform, please tell me so. | |
820 | */ | |
02a705ad | 821 | if((fd = socket(name->sa_family, type, 0)) < 0) |
d3372da9 | 822 | return(NULL); |
02a705ad | 823 | if(confgetint("net", "reuseaddr")) { |
687b2ee2 | 824 | intbuf = 1; |
02a705ad | 825 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
687b2ee2 | 826 | } |
02a705ad | 827 | ufd = mkufd(fd, UFD_LISTEN, NULL); |
02a705ad | 828 | ufd->d.l.family = name->sa_family; |
f96d0914 FT |
829 | lp = memset(smalloc(sizeof(*lp)), 0, sizeof(*lp)); |
830 | lp->ufd = ufd; | |
831 | ufd->d.l.lp = lp; | |
02a705ad FT |
832 | if((bind(fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(ufd, name, namelen) < 0))) { |
833 | freeufd(ufd); | |
d3372da9 | 834 | return(NULL); |
835 | } | |
02a705ad | 836 | if(listen(fd, 16) < 0) |
d3372da9 | 837 | { |
02a705ad | 838 | freeufd(ufd); |
d3372da9 | 839 | return(NULL); |
840 | } | |
02a705ad FT |
841 | lp->acceptcb = func; |
842 | lp->data = data; | |
843 | return(lp); | |
d3372da9 | 844 | } |
845 | ||
02a705ad | 846 | struct lport *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
c23acc61 | 847 | { |
848 | if(confgetint("net", "mode") == 1) | |
849 | { | |
850 | errno = EOPNOTSUPP; | |
851 | return(NULL); | |
852 | } | |
c23acc61 | 853 | if(confgetint("net", "mode") == 0) |
854 | return(netcslistenlocal(type, name, namelen, func, data)); | |
855 | errno = EOPNOTSUPP; | |
856 | return(NULL); | |
857 | } | |
858 | ||
02a705ad | 859 | struct lport *netcstcplisten(int port, int local, void (*func)(struct lport *, struct socket *, void *), void *data) |
0a1bc5b1 | 860 | { |
861 | struct sockaddr_in addr; | |
862 | #ifdef HAVE_IPV6 | |
863 | struct sockaddr_in6 addr6; | |
864 | #endif | |
02a705ad FT |
865 | struct lport *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct lport *, struct socket *, void *), void *); |
866 | struct lport *ret; | |
0a1bc5b1 | 867 | |
868 | if(local) | |
869 | csfunc = netcslistenlocal; | |
870 | else | |
871 | csfunc = netcslisten; | |
872 | #ifdef HAVE_IPV6 | |
873 | memset(&addr6, 0, sizeof(addr6)); | |
874 | addr6.sin6_family = AF_INET6; | |
875 | addr6.sin6_port = htons(port); | |
876 | addr6.sin6_addr = in6addr_any; | |
877 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
878 | return(ret); | |
879 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
880 | return(NULL); | |
881 | #endif | |
882 | memset(&addr, 0, sizeof(addr)); | |
883 | addr.sin_family = AF_INET; | |
884 | addr.sin_port = htons(port); | |
885 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
886 | } | |
887 | ||
d3372da9 | 888 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
889 | { | |
890 | struct socket *sk; | |
891 | int mode; | |
892 | ||
893 | mode = confgetint("net", "mode"); | |
894 | if((mode == 0) || (mode == 1)) | |
895 | { | |
896 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
897 | return(NULL); | |
02a705ad | 898 | if(bind(sk->ufd->fd, name, namelen) < 0) |
d3372da9 | 899 | { |
900 | putsock(sk); | |
901 | return(NULL); | |
902 | } | |
02a705ad FT |
903 | sksetstate(sk, SOCK_EST); |
904 | return(sk->back); | |
d3372da9 | 905 | } |
906 | errno = EOPNOTSUPP; | |
907 | return(NULL); | |
908 | } | |
909 | ||
02a705ad | 910 | struct socket *netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
d3372da9 | 911 | { |
02a705ad | 912 | struct ufd *nufd; |
d3372da9 | 913 | |
02a705ad | 914 | nufd = dupufd(sk->back->ufd); |
5afb0d14 | 915 | getsock(sk = nufd->sk->back); |
02a705ad FT |
916 | memcpy(nufd->d.s.remote = smalloc(addrlen), addr, nufd->d.s.remotelen = addrlen); |
917 | nufd->ignread = 1; | |
918 | return(sk); | |
d3372da9 | 919 | } |
920 | ||
cab0b442 | 921 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 922 | { |
923 | struct socket *sk; | |
924 | int mode; | |
925 | ||
926 | mode = confgetint("net", "mode"); | |
927 | if((mode == 0) || (mode == 1)) | |
928 | { | |
929 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
930 | return(NULL); | |
02a705ad FT |
931 | memcpy(sk->ufd->d.s.remote = smalloc(addrlen), addr, sk->ufd->d.s.remotelen = addrlen); |
932 | sk->back->conncb = func; | |
933 | sk->back->data = data; | |
934 | if(!connect(sk->ufd->fd, addr, addrlen)) | |
d3372da9 | 935 | { |
02a705ad FT |
936 | sksetstate(sk, SOCK_EST); |
937 | linksock(&cbatch, sk->back); | |
938 | return(sk->back); | |
d3372da9 | 939 | } |
940 | if(errno == EINPROGRESS) | |
941 | { | |
02a705ad FT |
942 | sksetstate(sk, SOCK_SYN); |
943 | return(sk->back); | |
d3372da9 | 944 | } |
945 | putsock(sk); | |
946 | return(NULL); | |
947 | } | |
948 | errno = EOPNOTSUPP; | |
949 | return(NULL); | |
950 | } | |
951 | ||
02a705ad | 952 | static void acceptunix(struct ufd *ufd) |
9e5f2b29 | 953 | { |
954 | int buf; | |
955 | ||
956 | buf = 1; | |
a8c5ada6 | 957 | #if UNIX_AUTH_STYLE == 1 |
02a705ad FT |
958 | if(setsockopt(ufd->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
959 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", ufd->fd, strerror(errno)); | |
a8c5ada6 | 960 | #elif UNIX_AUTH_STYLE == 2 |
02a705ad | 961 | if(getpeereid(ufd->fd, &ufd->d.s.ucred.uid, &ufd->d.s.ucred.gid) < 0) |
a8c5ada6 | 962 | { |
02a705ad FT |
963 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", ufd->fd, strerror(errno)); |
964 | ufd->d.s.ucred.uid = -1; | |
965 | ufd->d.s.ucred.gid = -1; | |
a8c5ada6 | 966 | } |
967 | #endif | |
9e5f2b29 | 968 | } |
969 | ||
f96d0914 FT |
970 | static void runbatches(void) |
971 | { | |
972 | struct scons *sc, *nsc; | |
973 | ||
974 | for(sc = cbatch, cbatch = NULL; sc; sc = nsc) { | |
975 | nsc = sc->n; | |
5afb0d14 FT |
976 | if(sc->s->conncb != NULL) |
977 | sc->s->conncb(sc->s, 0, sc->s->data); | |
834b0aa6 | 978 | putsock(sc->s); |
f96d0914 FT |
979 | free(sc); |
980 | } | |
981 | for(sc = rbatch, rbatch = NULL; sc; sc = nsc) { | |
982 | nsc = sc->n; | |
5afb0d14 FT |
983 | if(sc->s->readcb != NULL) |
984 | sc->s->readcb(sc->s, sc->s->data); | |
985 | if((sockgetdatalen(sc->s) == 0) && (sc->s->eos == 1)) { | |
986 | if(sc->s->errcb != NULL) | |
987 | sc->s->errcb(sc->s, 0, sc->s->data); | |
988 | sc->s->eos = 2; | |
989 | } | |
834b0aa6 | 990 | putsock(sc->s); |
f96d0914 FT |
991 | free(sc); |
992 | } | |
993 | for(sc = wbatch, wbatch = NULL; sc; sc = nsc) { | |
994 | nsc = sc->n; | |
5afb0d14 FT |
995 | if(sc->s->writecb != NULL) |
996 | sc->s->writecb(sc->s, sc->s->data); | |
834b0aa6 | 997 | putsock(sc->s); |
f96d0914 FT |
998 | free(sc); |
999 | } | |
1000 | } | |
1001 | ||
5afb0d14 FT |
1002 | static void cleansocks(void) |
1003 | { | |
1004 | struct ufd *ufd, *next; | |
1005 | ||
1006 | for(ufd = ufds; ufd != NULL; ufd = next) { | |
1007 | next = ufd->next; | |
834b0aa6 | 1008 | if(ufd->sk && ((ufd->fd < 0) || (sockgetdatalen(ufd->sk) == 0))) { |
5afb0d14 FT |
1009 | if(ufd->sk->eos == 1) { |
1010 | ufd->sk->eos = 2; | |
1011 | closeufd(ufd); | |
1012 | closesock(ufd->sk); | |
1013 | } | |
1014 | if((ufd->sk->refcount == 1) && (ufd->sk->back->refcount == 0)) { | |
1015 | freeufd(ufd); | |
1016 | continue; | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | } | |
1021 | ||
d3372da9 | 1022 | int pollsocks(int timeout) |
1023 | { | |
02a705ad | 1024 | int ret; |
eaa35963 | 1025 | socklen_t retlen; |
72a7835e FT |
1026 | int newfd, maxfd; |
1027 | fd_set rfds, wfds, efds; | |
5afb0d14 | 1028 | struct ufd *ufd, *nufd; |
02a705ad | 1029 | struct socket *nsk; |
d3372da9 | 1030 | struct sockaddr_storage ss; |
1031 | socklen_t sslen; | |
72a7835e | 1032 | struct timeval tv; |
d3372da9 | 1033 | |
5afb0d14 | 1034 | cleansocks(); |
72a7835e FT |
1035 | FD_ZERO(&rfds); |
1036 | FD_ZERO(&wfds); | |
1037 | FD_ZERO(&efds); | |
02a705ad FT |
1038 | for(maxfd = 0, ufd = ufds; ufd != NULL; ufd = ufd->next) { |
1039 | if(ufd->fd < 0) | |
d3372da9 | 1040 | continue; |
02a705ad FT |
1041 | if(!ufd->ignread) |
1042 | FD_SET(ufd->fd, &rfds); | |
1043 | if(ufd->sk != NULL) { | |
1044 | if(sockgetdatalen(ufd->sk) > 0) | |
1045 | FD_SET(ufd->fd, &wfds); | |
1046 | else if(ufd->sk->state == SOCK_SYN) | |
1047 | FD_SET(ufd->fd, &wfds); | |
1048 | } | |
1049 | FD_SET(ufd->fd, &efds); | |
1050 | if(ufd->fd > maxfd) | |
1051 | maxfd = ufd->fd; | |
d3372da9 | 1052 | } |
5afb0d14 FT |
1053 | if(rbatch || wbatch || cbatch) |
1054 | timeout = 0; | |
72a7835e FT |
1055 | tv.tv_sec = timeout / 1000; |
1056 | tv.tv_usec = (timeout % 1000) * 1000; | |
1057 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
02a705ad FT |
1058 | if(ret < 0) { |
1059 | if(errno != EINTR) { | |
72a7835e | 1060 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 1061 | /* To avoid CPU hogging in case it's bad, which it |
1062 | * probably is. */ | |
1063 | sleep(1); | |
1064 | } | |
d3372da9 | 1065 | return(1); |
1066 | } | |
5afb0d14 | 1067 | for(ufd = ufds; ufd != NULL; ufd = ufd->next) { |
02a705ad FT |
1068 | if(ufd->sk < 0) |
1069 | continue; | |
1070 | if(ufd->type == UFD_LISTEN) { | |
1071 | if(FD_ISSET(ufd->fd, &rfds)) { | |
d3372da9 | 1072 | sslen = sizeof(ss); |
02a705ad FT |
1073 | if((newfd = accept(ufd->fd, (struct sockaddr *)&ss, &sslen)) < 0) { |
1074 | if(ufd->d.l.lp->errcb != NULL) | |
1075 | ufd->d.l.lp->errcb(ufd->d.l.lp, errno, ufd->d.l.lp->data); | |
cab0b442 | 1076 | } |
02a705ad FT |
1077 | nsk = sockpair(0); |
1078 | nufd = mkufd(newfd, UFD_SOCK, nsk); | |
1079 | nufd->d.s.family = ufd->d.l.family; | |
1080 | sksetstate(nsk, SOCK_EST); | |
1081 | memcpy(nufd->d.s.remote = smalloc(sslen), &ss, sslen); | |
1082 | nufd->d.s.remotelen = sslen; | |
9e5f2b29 | 1083 | if(ss.ss_family == PF_UNIX) |
02a705ad FT |
1084 | acceptunix(nufd); |
1085 | if(ufd->d.l.lp->acceptcb != NULL) | |
5afb0d14 | 1086 | ufd->d.l.lp->acceptcb(ufd->d.l.lp, nsk->back, ufd->d.l.lp->data); |
02a705ad | 1087 | putsock(nsk); |
d3372da9 | 1088 | } |
02a705ad | 1089 | if(FD_ISSET(ufd->fd, &efds)) { |
d3372da9 | 1090 | retlen = sizeof(ret); |
02a705ad FT |
1091 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
1092 | if(ufd->d.l.lp->errcb != NULL) | |
1093 | ufd->d.l.lp->errcb(ufd->d.l.lp, ret, ufd->d.l.lp->data); | |
d3372da9 | 1094 | continue; |
1095 | } | |
02a705ad FT |
1096 | } else { |
1097 | if(ufd->sk->state == SOCK_SYN) { | |
1098 | if(FD_ISSET(ufd->fd, &efds)) { | |
1099 | retlen = sizeof(ret); | |
1100 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1101 | if(ufd->sk->back->conncb != NULL) | |
1102 | ufd->sk->back->conncb(ufd->sk->back, ret, ufd->sk->back->data); | |
1103 | closeufd(ufd); | |
1104 | continue; | |
1105 | } | |
1106 | if(FD_ISSET(ufd->fd, &rfds) || FD_ISSET(ufd->fd, &wfds)) { | |
1107 | sksetstate(ufd->sk, SOCK_EST); | |
1108 | linksock(&cbatch, ufd->sk->back); | |
1109 | } | |
1110 | } else if(ufd->sk->state == SOCK_EST) { | |
1111 | if(FD_ISSET(ufd->fd, &efds)) { | |
1112 | retlen = sizeof(ret); | |
1113 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1114 | sockerror(ufd->sk, ret); | |
1115 | closeufd(ufd); | |
1116 | continue; | |
1117 | } | |
1118 | if(FD_ISSET(ufd->fd, &rfds)) | |
1119 | sockrecv(ufd); | |
5afb0d14 FT |
1120 | if(ufd->fd == -1) |
1121 | continue; | |
02a705ad FT |
1122 | if(FD_ISSET(ufd->fd, &wfds)) |
1123 | sockflush(ufd); | |
d3372da9 | 1124 | } |
d3372da9 | 1125 | } |
d3372da9 | 1126 | } |
f96d0914 | 1127 | runbatches(); |
5afb0d14 | 1128 | cleansocks(); |
d3372da9 | 1129 | return(1); |
1130 | } | |
1131 | ||
f96d0914 FT |
1132 | static struct ufd *getskufd(struct socket *sk) |
1133 | { | |
1134 | while(1) { | |
1135 | if(sk->back->ufd != NULL) | |
1136 | return(sk->back->ufd); | |
1137 | if((sk = sk->back->pnext) == NULL) | |
1138 | break; | |
1139 | } | |
1140 | return(NULL); | |
1141 | } | |
1142 | ||
d3372da9 | 1143 | int socksettos(struct socket *sk, int tos) |
1144 | { | |
b020fb3d | 1145 | int buf; |
f96d0914 | 1146 | struct ufd *ufd; |
b020fb3d | 1147 | |
f96d0914 FT |
1148 | ufd = getskufd(sk); |
1149 | if(ufd->type != UFD_SOCK) { | |
1150 | errno = EOPNOTSUPP; | |
1151 | return(-1); | |
1152 | } | |
1153 | if(ufd->d.s.family == AF_UNIX) | |
7ab36fbd | 1154 | return(0); /* Unix sockets are always perfect. :) */ |
f96d0914 | 1155 | if(ufd->d.s.family == AF_INET) |
d3372da9 | 1156 | { |
b020fb3d | 1157 | switch(tos) |
1158 | { | |
b198bed6 | 1159 | case 0: |
1160 | buf = 0; | |
1161 | break; | |
b020fb3d | 1162 | case SOCK_TOS_MINCOST: |
18c1ae1d | 1163 | buf = 0x02; |
b020fb3d | 1164 | break; |
1165 | case SOCK_TOS_MAXREL: | |
18c1ae1d | 1166 | buf = 0x04; |
b020fb3d | 1167 | break; |
1168 | case SOCK_TOS_MAXTP: | |
18c1ae1d | 1169 | buf = 0x08; |
b020fb3d | 1170 | break; |
1171 | case SOCK_TOS_MINDELAY: | |
18c1ae1d | 1172 | buf = 0x10; |
b020fb3d | 1173 | break; |
1174 | default: | |
1175 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1176 | return(-1); | |
1177 | } | |
f96d0914 | 1178 | if(setsockopt(ufd->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1179 | { |
1180 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1181 | return(-1); | |
1182 | } | |
1183 | return(0); | |
1184 | } | |
f96d0914 | 1185 | if(ufd->d.s.family == AF_INET6) |
b020fb3d | 1186 | { |
1187 | switch(tos) | |
1188 | { | |
b198bed6 | 1189 | case 0: |
1190 | buf = 0; | |
b020fb3d | 1191 | case SOCK_TOS_MINCOST: |
1192 | buf = confgetint("net", "diffserv-mincost"); | |
1193 | break; | |
1194 | case SOCK_TOS_MAXREL: | |
1195 | buf = confgetint("net", "diffserv-maxrel"); | |
1196 | break; | |
1197 | case SOCK_TOS_MAXTP: | |
1198 | buf = confgetint("net", "diffserv-maxtp"); | |
1199 | break; | |
1200 | case SOCK_TOS_MINDELAY: | |
1201 | buf = confgetint("net", "diffserv-mindelay"); | |
1202 | break; | |
1203 | default: | |
1204 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1205 | return(-1); | |
1206 | } | |
1207 | /* | |
1208 | On Linux, the API IPv6 flow label management doesn't seem to | |
1209 | be entirely complete, so I guess this will have to wait. | |
1210 | ||
1211 | if(setsockopt(...) < 0) | |
1212 | { | |
1213 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1214 | return(-1); | |
1215 | } | |
1216 | */ | |
1217 | return(0); | |
1218 | } | |
f96d0914 | 1219 | flog(LOG_WARNING, "could not set TOS on sock of family %i", ufd->d.s.family); |
d3372da9 | 1220 | return(1); |
1221 | } | |
1222 | ||
1223 | struct resolvedata | |
1224 | { | |
1225 | int fd; | |
1226 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1227 | void *data; | |
1228 | struct sockaddr_storage addr; | |
1229 | int addrlen; | |
1230 | }; | |
1231 | ||
1232 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1233 | { | |
1234 | static char buf[80]; | |
1235 | int ret; | |
1236 | struct sockaddr_in *ipv4; | |
1237 | ||
1238 | if(!status) | |
1239 | { | |
1240 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1241 | { | |
b4d16e90 | 1242 | errno = ENOENT; |
d3372da9 | 1243 | data->callback(NULL, 0, data->data); |
1244 | } else { | |
1245 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1246 | memcpy(&ipv4->sin_addr, buf, 4); | |
1247 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1248 | } | |
1249 | } else { | |
b4d16e90 | 1250 | errno = ENOENT; |
d3372da9 | 1251 | data->callback(NULL, 0, data->data); |
1252 | } | |
1253 | close(data->fd); | |
1254 | free(data); | |
1255 | } | |
1256 | ||
1257 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1258 | { | |
1259 | int i; | |
1260 | char *p; | |
1261 | int port; | |
1262 | int pfd[2]; | |
1263 | pid_t child; | |
1264 | struct resolvedata *rdata; | |
1265 | struct sockaddr_in ipv4; | |
1266 | struct hostent *he; | |
1267 | sigset_t sigset; | |
1268 | ||
1269 | /* IPv4 */ | |
1270 | port = -1; | |
1271 | if((p = strchr(addr, ':')) != NULL) | |
1272 | { | |
1273 | *p = 0; | |
1274 | port = atoi(p + 1); | |
1275 | } | |
1276 | ipv4.sin_family = AF_INET; | |
1277 | ipv4.sin_port = htons(port); | |
1278 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1279 | { | |
1280 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1281 | } else { | |
1282 | sigemptyset(&sigset); | |
1283 | sigaddset(&sigset, SIGCHLD); | |
1284 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1285 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1286 | { | |
1287 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1288 | return(-1); | |
1289 | } | |
1290 | if(child == 0) | |
1291 | { | |
1292 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1293 | for(i = 3; i < FD_SETSIZE; i++) | |
1294 | { | |
1295 | if(i != pfd[1]) | |
1296 | close(i); | |
1297 | } | |
1298 | signal(SIGALRM, SIG_DFL); | |
1299 | alarm(30); | |
1300 | if((he = gethostbyname(addr)) == NULL) | |
1301 | exit(1); | |
1302 | write(pfd[1], he->h_addr_list[0], 4); | |
1303 | exit(0); | |
1304 | } else { | |
1305 | close(pfd[1]); | |
1306 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1307 | rdata = smalloc(sizeof(*rdata)); | |
1308 | rdata->fd = pfd[0]; | |
1309 | rdata->callback = callback; | |
1310 | rdata->data = data; | |
1311 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1312 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1313 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1314 | return(1); | |
1315 | } | |
1316 | } | |
1317 | return(0); | |
1318 | } | |
1319 | ||
f96d0914 | 1320 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
d3372da9 | 1321 | { |
1322 | socklen_t len; | |
1323 | struct sockaddr_storage name; | |
1324 | ||
1325 | *namebuf = NULL; | |
f96d0914 | 1326 | if(fd < 0) |
d3372da9 | 1327 | return(-1); |
1328 | len = sizeof(name); | |
f96d0914 | 1329 | if(getsockname(fd, (struct sockaddr *)&name, &len) < 0) |
d3372da9 | 1330 | { |
6fb0c6ac | 1331 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1332 | return(-1); |
1333 | } | |
1334 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1335 | if(lenbuf != NULL) |
1336 | *lenbuf = len; | |
d3372da9 | 1337 | return(0); |
1338 | } | |
1339 | ||
f96d0914 FT |
1340 | int lstgetlocalname(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
1341 | { | |
1342 | struct ufd *ufd; | |
1343 | ||
1344 | ufd = lp->ufd; | |
1345 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1346 | } | |
1347 | ||
1348 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1349 | { | |
1350 | struct ufd *ufd; | |
1351 | ||
1352 | ufd = getskufd(sk); | |
1353 | if(ufd->type != UFD_SOCK) { | |
1354 | errno = EOPNOTSUPP; | |
1355 | return(-1); | |
1356 | } | |
1357 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1358 | } | |
1359 | ||
eaa35963 | 1360 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1361 | { | |
1362 | if(dst->sa_family != src->sa_family) | |
1363 | { | |
1364 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1365 | return; | |
1366 | } | |
1367 | switch(src->sa_family) | |
1368 | { | |
1369 | case AF_INET: | |
1370 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1371 | break; | |
1372 | case AF_INET6: | |
1373 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1374 | break; | |
1375 | default: | |
1376 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1377 | break; | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1382 | { |
6fb0c6ac | 1383 | int ret; |
eaa35963 | 1384 | socklen_t plen; |
1385 | struct sockaddr *pname; | |
1386 | ||
1387 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1388 | { | |
1389 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1390 | return(-1); | |
1391 | } | |
1392 | if(ret) | |
1393 | return(0); | |
1394 | sethostaddr(addr, pname); | |
1395 | free(pname); | |
1396 | return(0); | |
1397 | } | |
1398 | ||
f96d0914 | 1399 | static int getremotename(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
eaa35963 | 1400 | { |
d3372da9 | 1401 | socklen_t len; |
6fb0c6ac | 1402 | struct sockaddr *name; |
f96d0914 FT |
1403 | |
1404 | switch(confgetint("net", "mode")) { | |
d3372da9 | 1405 | case 0: |
1406 | *namebuf = NULL; | |
f96d0914 | 1407 | if(!getlocalname(fd, &name, &len)) { |
6fb0c6ac | 1408 | *namebuf = name; |
1409 | *lenbuf = len; | |
eaa35963 | 1410 | makepublic(name); |
6fb0c6ac | 1411 | return(0); |
1412 | } | |
1413 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1414 | return(-1); | |
d3372da9 | 1415 | case 1: |
1416 | errno = EOPNOTSUPP; | |
1417 | return(-1); | |
1418 | default: | |
1419 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1420 | errno = EOPNOTSUPP; | |
1421 | return(-1); | |
1422 | } | |
1423 | } | |
1424 | ||
f96d0914 FT |
1425 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1426 | { | |
1427 | struct ufd *ufd; | |
1428 | ||
1429 | ufd = getskufd(sk); | |
1430 | if(ufd->type != UFD_SOCK) { | |
1431 | errno = EOPNOTSUPP; | |
1432 | return(-1); | |
1433 | } | |
1434 | if(ufd->fd < 0) { | |
1435 | errno = EBADF; | |
1436 | return(-1); | |
1437 | } | |
1438 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1439 | } | |
1440 | ||
1441 | int lstgetremotename(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1442 | { | |
1443 | struct ufd *ufd; | |
1444 | ||
1445 | ufd = lp->ufd; | |
1446 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1447 | } | |
1448 | ||
d29853b1 | 1449 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1450 | { | |
1451 | struct sockaddr *name1, *name2; | |
1452 | socklen_t len1, len2; | |
f96d0914 FT |
1453 | struct ufd *ufd1, *ufd2; |
1454 | ||
1455 | ufd1 = getskufd(sk); | |
1456 | ufd2 = getskufd(sk2); | |
1457 | if((ufd1->type != UFD_SOCK) || (ufd2->type != UFD_SOCK)) { | |
1458 | errno = EOPNOTSUPP; | |
1459 | return(-1); | |
1460 | } | |
1461 | if(ufd1->d.s.family != ufd2->d.s.family) | |
1462 | { | |
1463 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); | |
1464 | return(-1); | |
1465 | } | |
1466 | if(getremotename(ufd1->fd, &name1, &len1)) | |
1467 | return(-1); | |
1468 | if(getremotename(ufd2->fd, &name2, &len2)) { | |
1469 | free(name1); | |
1470 | return(-1); | |
1471 | } | |
1472 | sethostaddr(name1, name2); | |
1473 | free(name2); | |
1474 | *namebuf = name1; | |
1475 | *lenbuf = len1; | |
1476 | return(0); | |
1477 | } | |
1478 | ||
1479 | int lstgetremotename2(struct lport *lp, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1480 | { | |
1481 | struct sockaddr *name1, *name2; | |
1482 | socklen_t len1, len2; | |
1483 | struct ufd *ufd1, *ufd2; | |
d29853b1 | 1484 | |
f96d0914 FT |
1485 | ufd1 = lp->ufd; |
1486 | ufd2 = getskufd(sk2); | |
1487 | if(ufd2->type != UFD_SOCK) { | |
1488 | errno = EOPNOTSUPP; | |
1489 | return(-1); | |
1490 | } | |
d334fbb5 | 1491 | if(ufd1->d.l.family != ufd2->d.s.family) |
d29853b1 | 1492 | { |
d334fbb5 | 1493 | flog(LOG_ERR, "using lstgetremotename2 with sockets of differing family: %i %i", ufd1->d.l.family, ufd2->d.s.family); |
d29853b1 | 1494 | return(-1); |
1495 | } | |
f96d0914 | 1496 | if(getremotename(ufd1->fd, &name1, &len1)) |
d29853b1 | 1497 | return(-1); |
f96d0914 | 1498 | if(getremotename(ufd2->fd, &name2, &len2)) { |
d29853b1 | 1499 | free(name1); |
1500 | return(-1); | |
1501 | } | |
1502 | sethostaddr(name1, name2); | |
1503 | free(name2); | |
1504 | *namebuf = name1; | |
1505 | *lenbuf = len1; | |
1506 | return(0); | |
1507 | } | |
1508 | ||
f96d0914 FT |
1509 | int getucred(struct socket *sk, uid_t *uid, gid_t *gid) |
1510 | { | |
1511 | struct ufd *ufd; | |
1512 | ||
1513 | ufd = getskufd(sk); | |
1514 | if(ufd->type != UFD_SOCK) { | |
1515 | errno = EOPNOTSUPP; | |
1516 | return(-1); | |
1517 | } | |
1518 | if(ufd->d.s.family != AF_UNIX) { | |
1519 | errno = EOPNOTSUPP; | |
1520 | return(-1); | |
1521 | } | |
1522 | *uid = ufd->d.s.ucred.uid; | |
1523 | *gid = ufd->d.s.ucred.gid; | |
1524 | return(0); | |
1525 | } | |
1526 | ||
02a705ad FT |
1527 | void sockblock(struct socket *sk, int block) |
1528 | { | |
f96d0914 FT |
1529 | struct ufd *ufd; |
1530 | ||
1531 | ufd = getskufd(sk); | |
1532 | ufd->ignread = block; | |
1533 | } | |
1534 | ||
1535 | int sockfamily(struct socket *sk) | |
1536 | { | |
1537 | struct ufd *ufd; | |
1538 | ||
1539 | ufd = getskufd(sk); | |
1540 | if(ufd->type != UFD_SOCK) { | |
1541 | errno = EOPNOTSUPP; | |
1542 | return(-1); | |
1543 | } | |
1544 | return(ufd->d.s.family); | |
02a705ad FT |
1545 | } |
1546 | ||
1547 | int sockpeeraddr(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1548 | { | |
f96d0914 FT |
1549 | struct ufd *ufd; |
1550 | ||
1551 | ufd = getskufd(sk); | |
1552 | if(ufd->type != UFD_SOCK) { | |
1553 | errno = EOPNOTSUPP; | |
1554 | return(-1); | |
1555 | } | |
1556 | if(ufd->d.s.remote == NULL) | |
1557 | return(-1); | |
1558 | *namebuf = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, ufd->d.s.remotelen); | |
1559 | if(lenbuf != NULL) | |
1560 | *lenbuf = ufd->d.s.remotelen; | |
1561 | return(0); | |
02a705ad FT |
1562 | } |
1563 | ||
1564 | char *formatsockpeer(struct socket *sk) | |
1565 | { | |
1566 | struct sockaddr *name; | |
1567 | socklen_t nlen; | |
1568 | char *ret; | |
1569 | ||
1570 | if(sockpeeraddr(sk, &name, &nlen)) | |
1571 | return(NULL); | |
1572 | ret = formataddress(name, nlen); | |
1573 | free(name); | |
1574 | return(ret); | |
1575 | } | |
1576 | ||
99a28d47 | 1577 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1578 | { | |
1579 | struct sockaddr_un *u1, *u2; | |
1580 | struct sockaddr_in *n1, *n2; | |
1581 | #ifdef HAVE_IPV6 | |
1582 | struct sockaddr_in6 *s1, *s2; | |
1583 | #endif | |
1584 | ||
1585 | if(x->sa_family != y->sa_family) | |
1586 | return(0); | |
1587 | switch(x->sa_family) { | |
1588 | case AF_UNIX: | |
1589 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1590 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1591 | return(0); | |
1592 | break; | |
1593 | case AF_INET: | |
1594 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1595 | if(n1->sin_port != n2->sin_port) | |
1596 | return(0); | |
1597 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1598 | return(0); | |
1599 | break; | |
c8a729d7 | 1600 | #ifdef HAVE_IPV6 |
99a28d47 | 1601 | case AF_INET6: |
1602 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1603 | if(s1->sin6_port != s2->sin6_port) | |
1604 | return(0); | |
1605 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1606 | return(0); | |
1607 | break; | |
c8a729d7 | 1608 | #endif |
99a28d47 | 1609 | } |
1610 | return(1); | |
1611 | } | |
1612 | ||
d3372da9 | 1613 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1614 | { | |
d3372da9 | 1615 | struct sockaddr_in *ipv4; |
1616 | #ifdef HAVE_IPV6 | |
1617 | struct sockaddr_in6 *ipv6; | |
1618 | #endif | |
1619 | static char *ret = NULL; | |
1620 | char buf[1024]; | |
1621 | ||
1622 | if(ret != NULL) | |
1623 | free(ret); | |
1624 | ret = NULL; | |
1625 | switch(arg->sa_family) | |
1626 | { | |
1627 | case AF_UNIX: | |
6a97462e | 1628 | ret = sstrdup("Unix socket"); |
d3372da9 | 1629 | break; |
1630 | case AF_INET: | |
1631 | ipv4 = (struct sockaddr_in *)arg; | |
1632 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1633 | return(NULL); | |
1634 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1635 | break; | |
1636 | #ifdef HAVE_IPV6 | |
1637 | case AF_INET6: | |
1638 | ipv6 = (struct sockaddr_in6 *)arg; | |
1639 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1640 | return(NULL); | |
fc7f7735 | 1641 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1642 | break; |
1643 | #endif | |
1644 | default: | |
1645 | errno = EPFNOSUPPORT; | |
1646 | break; | |
1647 | } | |
1648 | return(ret); | |
1649 | } | |
1650 | ||
1651 | #if 0 | |
1652 | ||
1653 | /* | |
1654 | * It was very nice to use this, but it seems | |
1655 | * to mess things up, so I guess it has to go... :-( | |
1656 | */ | |
1657 | ||
1658 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1659 | { | |
1660 | struct sockaddr *arg; | |
1661 | socklen_t arglen; | |
1662 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1663 | * lowercase letters to 1, so I do this | |
1664 | * instead. */ | |
1665 | struct sockaddr_in *ipv4; | |
1666 | int ret; | |
1667 | ||
1668 | arg = *(struct sockaddr **)(args[0]); | |
1669 | arglen = *(socklen_t *)(args[1]); | |
1670 | switch(arg->sa_family) | |
1671 | { | |
1672 | case AF_UNIX: | |
1673 | UNIX = (struct sockaddr_un *)arg; | |
1674 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1675 | break; | |
1676 | case AF_INET: | |
1677 | ipv4 = (struct sockaddr_in *)arg; | |
1678 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1679 | break; | |
1680 | default: | |
1681 | ret = -1; | |
1682 | errno = EPFNOSUPPORT; | |
1683 | break; | |
1684 | } | |
1685 | return(ret); | |
1686 | } | |
1687 | ||
1688 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1689 | { | |
1690 | if(n > 0) | |
1691 | argtypes[0] = PA_POINTER; | |
1692 | if(n > 1) | |
1693 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1694 | * be an int, so I guess this should be | |
1695 | * safe. */ | |
1696 | return(2); | |
1697 | } | |
1698 | #endif | |
1699 | ||
1700 | static int init(int hup) | |
1701 | { | |
1702 | if(!hup) | |
1703 | { | |
1704 | /* | |
1705 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1706 | { | |
1707 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1708 | return(1); | |
1709 | } | |
1710 | */ | |
1711 | } | |
1712 | return(0); | |
1713 | } | |
1714 | ||
1715 | static void terminate(void) | |
1716 | { | |
f96d0914 FT |
1717 | /* |
1718 | while(ufds != NULL) | |
1719 | freeufd(ufds); | |
1720 | */ | |
d3372da9 | 1721 | } |
1722 | ||
1723 | static struct module me = | |
1724 | { | |
1725 | .name = "net", | |
1726 | .conf = | |
1727 | { | |
1728 | .vars = myvars | |
1729 | }, | |
1730 | .init = init, | |
1731 | .terminate = terminate | |
1732 | }; | |
1733 | ||
1734 | MODULE(me) |