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; |
81286a22 | 214 | new->maxbuf = 65536; |
d3372da9 | 215 | numsocks++; |
216 | return(new); | |
217 | } | |
218 | ||
02a705ad FT |
219 | static struct socket *sockpair(int dgram) |
220 | { | |
221 | struct socket *s1, *s2; | |
222 | ||
223 | s1 = newsock1(dgram); | |
224 | s2 = newsock1(dgram); | |
225 | s1->back = s2; | |
226 | s2->back = s1; | |
227 | putsock(s2); | |
228 | return(s1); | |
229 | } | |
230 | ||
231 | static void sksetstate(struct socket *sk, int state) | |
232 | { | |
233 | sk->state = state; | |
234 | sk->back->state = state; | |
235 | } | |
236 | ||
1ce5968e FT |
237 | struct socket *netsockpipe(void) |
238 | { | |
239 | struct socket *sk; | |
240 | ||
241 | sk = sockpair(0); | |
242 | sksetstate(sk, SOCK_EST); | |
243 | return(sk); | |
244 | } | |
245 | ||
02a705ad FT |
246 | static void closeufd(struct ufd *ufd) |
247 | { | |
248 | if(ufd->fd != -1) | |
249 | close(ufd->fd); | |
250 | ufd->fd = -1; | |
251 | } | |
252 | ||
253 | static void freeufd(struct ufd *ufd) | |
254 | { | |
255 | if(ufd->next != NULL) | |
256 | ufd->next->prev = ufd->prev; | |
257 | if(ufd->prev != NULL) | |
258 | ufd->prev->next = ufd->next; | |
259 | if(ufd == ufds) | |
260 | ufds = ufd->next; | |
261 | closeufd(ufd); | |
5afb0d14 FT |
262 | if(ufd->sk != NULL) |
263 | putsock(ufd->sk); | |
02a705ad FT |
264 | if(ufd->type == UFD_SOCK) { |
265 | if(ufd->d.s.remote != NULL) | |
266 | free(ufd->d.s.remote); | |
267 | } | |
268 | free(ufd); | |
269 | } | |
270 | ||
271 | static struct ufd *mkufd(int fd, int type, struct socket *sk) | |
272 | { | |
273 | struct ufd *ufd; | |
274 | ||
275 | ufd = memset(smalloc(sizeof(*ufd)), 0, sizeof(*ufd)); | |
276 | ufd->fd = fd; | |
5afb0d14 | 277 | ufd->type = type; |
02a705ad FT |
278 | if(sk != NULL) { |
279 | getsock(ufd->sk = sk); | |
280 | sk->ufd = ufd; | |
281 | } | |
282 | if(type == UFD_SOCK) { | |
283 | ufd->d.s.ucred.uid = -1; | |
284 | ufd->d.s.ucred.gid = -1; | |
285 | } | |
286 | ufd->next = ufds; | |
287 | if(ufds) | |
288 | ufds->prev = ufd; | |
289 | ufds = ufd; | |
290 | return(ufd); | |
291 | } | |
292 | ||
293 | static struct ufd *dupufd(struct ufd *ufd) | |
294 | { | |
295 | struct ufd *nufd; | |
296 | struct socket *nsk; | |
297 | ||
298 | if(ufd->sk != NULL) | |
299 | nsk = sockpair(ufd->sk->dgram); | |
300 | else | |
301 | nsk = NULL; | |
302 | nufd = mkufd(ufd->fd, ufd->type, nsk); | |
303 | if(nsk != NULL) | |
304 | putsock(nsk); | |
305 | if((nufd->fd = dup(ufd->fd)) < 0) | |
306 | { | |
307 | flog(LOG_WARNING, "could not dup() fd: %s", strerror(errno)); | |
308 | freeufd(nufd); | |
309 | return(NULL); | |
310 | } | |
5afb0d14 | 311 | sksetstate(nsk, SOCK_EST); |
02a705ad FT |
312 | if(ufd->type == UFD_SOCK) { |
313 | nufd->d.s.family = ufd->d.s.family; | |
314 | nufd->d.s.type = ufd->d.s.type; | |
315 | nufd->d.s.ucred.uid = ufd->d.s.ucred.uid; | |
316 | nufd->d.s.ucred.gid = ufd->d.s.ucred.gid; | |
317 | if(ufd->d.s.remote != NULL) | |
318 | nufd->d.s.remote = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, nufd->d.s.remotelen = ufd->d.s.remotelen); | |
319 | } else if(ufd->type == UFD_LISTEN) { | |
320 | nufd->d.l.family = ufd->d.l.family; | |
321 | } | |
322 | return(nufd); | |
323 | } | |
324 | ||
d3372da9 | 325 | static struct socket *mksock(int domain, int type) |
326 | { | |
327 | int fd; | |
02a705ad FT |
328 | struct socket *sk; |
329 | struct ufd *ufd; | |
d3372da9 | 330 | |
331 | if((fd = socket(domain, type, 0)) < 0) | |
332 | { | |
333 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
334 | return(NULL); | |
335 | } | |
02a705ad FT |
336 | sk = sockpair(type == SOCK_DGRAM); |
337 | ufd = mkufd(fd, UFD_SOCK, sk); | |
338 | ufd->d.s.family = domain; | |
339 | ufd->d.s.type = type; | |
d3372da9 | 340 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 341 | return(sk); |
d3372da9 | 342 | } |
343 | ||
344 | struct socket *wrapsock(int fd) | |
345 | { | |
02a705ad FT |
346 | struct socket *sk; |
347 | struct ufd *ufd; | |
d3372da9 | 348 | |
02a705ad FT |
349 | sk = sockpair(0); |
350 | ufd = mkufd(fd, UFD_PIPE, sk->back); | |
351 | sksetstate(sk, SOCK_EST); | |
d3372da9 | 352 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 353 | return(sk); |
d3372da9 | 354 | } |
355 | ||
356 | void getsock(struct socket *sk) | |
357 | { | |
358 | sk->refcount++; | |
359 | } | |
360 | ||
02a705ad | 361 | static void freesock(struct socket *sk) |
d3372da9 | 362 | { |
363 | struct dgrambuf *buf; | |
364 | ||
02a705ad FT |
365 | if(sk->dgram) { |
366 | while((buf = sk->buf.d.f) != NULL) { | |
367 | sk->buf.d.f = buf->next; | |
368 | freedgbuf(buf); | |
d3372da9 | 369 | } |
02a705ad FT |
370 | } else { |
371 | if(sk->buf.s.buf != NULL) | |
372 | free(sk->buf.s.buf); | |
373 | } | |
374 | free(sk); | |
375 | numsocks--; | |
376 | } | |
377 | ||
378 | void putsock(struct socket *sk) | |
379 | { | |
7dddb551 FT |
380 | struct socket *back; |
381 | ||
02a705ad FT |
382 | if(--(sk->refcount) < 0) { |
383 | flog(LOG_CRIT, "BUG: socket refcount < 0"); | |
384 | abort(); | |
385 | } | |
386 | if((sk->refcount == 0) && (sk->back->refcount == 0)) { | |
7dddb551 | 387 | back = sk->back; |
02a705ad | 388 | freesock(sk); |
7dddb551 | 389 | freesock(back); |
02a705ad FT |
390 | } |
391 | } | |
392 | ||
1ff9e8ea FT |
393 | void quitsock(struct socket *sk) |
394 | { | |
395 | sk->readcb = NULL; | |
396 | sk->writecb = NULL; | |
397 | sk->errcb = NULL; | |
398 | putsock(sk); | |
399 | } | |
400 | ||
02a705ad FT |
401 | static void linksock(struct scons **list, struct socket *sk) |
402 | { | |
403 | struct scons *sc; | |
404 | ||
405 | for(sc = *list; sc != NULL; sc = sc->n) { | |
406 | if(sc->s == sk) | |
407 | return; | |
d3372da9 | 408 | } |
02a705ad FT |
409 | sc = smalloc(sizeof(*sc)); |
410 | getsock(sc->s = sk); | |
411 | sc->n = *list; | |
412 | sc->p = NULL; | |
413 | if(*list) | |
414 | (*list)->p = sc; | |
415 | *list = sc; | |
d3372da9 | 416 | } |
417 | ||
336539c2 | 418 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
419 | { | |
02a705ad FT |
420 | if(size == 0) |
421 | return; | |
422 | if(sk->dgram) { | |
336539c2 | 423 | /* XXX */ |
02a705ad FT |
424 | } else { |
425 | sizebuf(&sk->buf.s.buf, &sk->buf.s.bufsize, sk->buf.s.datasize + size, 1, 1); | |
426 | memmove(sk->buf.s.buf + size, sk->buf.s.buf, sk->buf.s.datasize); | |
427 | memcpy(sk->buf.s.buf, buf, size); | |
428 | sk->buf.s.datasize += size; | |
429 | linksock(&rbatch, sk); | |
336539c2 | 430 | } |
02a705ad FT |
431 | } |
432 | ||
433 | /* Read as the preterite of `read' */ | |
434 | void sockread(struct socket *sk) | |
435 | { | |
5afb0d14 FT |
436 | if((sockgetdatalen(sk) == 0) && (sk->eos == 1)) |
437 | linksock(&rbatch, sk); | |
02a705ad FT |
438 | linksock(&wbatch, sk->back); |
439 | } | |
440 | ||
441 | void freedgbuf(struct dgrambuf *dg) | |
442 | { | |
443 | if(dg->data != NULL) | |
444 | free(dg->data); | |
445 | if(dg->addr != NULL) | |
446 | free(dg->addr); | |
447 | free(dg); | |
448 | } | |
449 | ||
450 | struct dgrambuf *sockgetdgbuf(struct socket *sk) | |
451 | { | |
452 | struct dgrambuf *dbuf; | |
453 | ||
454 | if((dbuf = sk->buf.d.f) == NULL) | |
455 | return(NULL); | |
456 | sk->buf.d.f = dbuf->next; | |
457 | if(dbuf->next == NULL) | |
458 | sk->buf.d.l = NULL; | |
459 | dbuf->next = NULL; | |
460 | sockread(sk); | |
461 | return(dbuf); | |
336539c2 | 462 | } |
463 | ||
d3372da9 | 464 | void *sockgetinbuf(struct socket *sk, size_t *size) |
465 | { | |
466 | void *buf; | |
467 | struct dgrambuf *dbuf; | |
468 | ||
02a705ad FT |
469 | if(sk->dgram) { |
470 | dbuf = sockgetdgbuf(sk); | |
d3372da9 | 471 | buf = dbuf->data; |
472 | *size = dbuf->size; | |
473 | free(dbuf->addr); | |
474 | free(dbuf); | |
02a705ad FT |
475 | } else { |
476 | if((sk->buf.s.buf == NULL) || (sk->buf.s.datasize == 0)) | |
477 | { | |
478 | *size = 0; | |
479 | return(NULL); | |
480 | } | |
481 | buf = sk->buf.s.buf; | |
482 | *size = sk->buf.s.datasize; | |
483 | sk->buf.s.buf = NULL; | |
484 | sk->buf.s.bufsize = sk->buf.s.datasize = 0; | |
485 | sockread(sk); | |
d3372da9 | 486 | } |
02a705ad FT |
487 | return(buf); |
488 | } | |
489 | ||
490 | void sockqueue(struct socket *sk, void *data, size_t size) | |
491 | { | |
492 | struct dgrambuf *new; | |
493 | struct sockaddr *remote; | |
494 | socklen_t remotelen; | |
495 | ||
496 | if(size == 0) | |
497 | return; | |
498 | if(sk->state == SOCK_STL) | |
499 | return; | |
500 | if(sk->dgram) { | |
501 | if(sockpeeraddr(sk, &remote, &remotelen)) | |
502 | return; | |
503 | new = smalloc(sizeof(*new)); | |
504 | new->next = NULL; | |
505 | memcpy(new->data = smalloc(size), data, new->size = size); | |
506 | new->addr = remote; | |
507 | new->addrlen = remotelen; | |
508 | if(sk->back->buf.d.l == NULL) | |
509 | { | |
510 | sk->back->buf.d.l = sk->back->buf.d.f = new; | |
511 | } else { | |
512 | sk->back->buf.d.l->next = new; | |
513 | sk->back->buf.d.l = new; | |
514 | } | |
515 | } else { | |
516 | sizebuf(&(sk->back->buf.s.buf), &(sk->back->buf.s.bufsize), sk->back->buf.s.datasize + size, 1, 1); | |
517 | memcpy(sk->back->buf.s.buf + sk->back->buf.s.datasize, data, size); | |
518 | sk->back->buf.s.datasize += size; | |
519 | } | |
520 | linksock(&rbatch, sk->back); | |
521 | } | |
522 | ||
523 | void sockqueuedg(struct socket *sk, struct dgrambuf *dg) | |
524 | { | |
525 | if(sk->state == SOCK_STL) { | |
526 | freedgbuf(dg); | |
527 | return; | |
528 | } | |
529 | if(!sk->dgram) { | |
530 | flog(LOG_ERR, "BUG: sockqueuedg called on non-dgram socket"); | |
531 | freedgbuf(dg); | |
532 | return; | |
533 | } | |
534 | dg->next = NULL; | |
535 | if(sk->back->buf.d.l == NULL) | |
536 | { | |
537 | sk->back->buf.d.l = sk->back->buf.d.f = dg; | |
538 | } else { | |
539 | sk->back->buf.d.l->next = dg; | |
540 | sk->back->buf.d.l = dg; | |
541 | } | |
542 | linksock(&rbatch, sk->back); | |
543 | } | |
544 | ||
40c21c4f | 545 | void sockerror(struct socket *sk, int en) |
02a705ad FT |
546 | { |
547 | sksetstate(sk, SOCK_STL); | |
548 | if(sk->back->errcb != NULL) | |
549 | sk->back->errcb(sk->back, en, sk->back->data); | |
d3372da9 | 550 | } |
551 | ||
02a705ad | 552 | static void recvcmsg(struct ufd *ufd, struct msghdr *msg) |
9e5f2b29 | 553 | { |
554 | struct cmsghdr *cmsg; | |
9e5f2b29 | 555 | |
556 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
557 | { | |
a8c5ada6 | 558 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 559 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
560 | { | |
a8c5ada6 | 561 | struct ucred *cred; |
02a705ad | 562 | if(ufd->d.s.ucred.uid == -1) |
9e5f2b29 | 563 | { |
564 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
02a705ad FT |
565 | ufd->d.s.ucred.uid = cred->uid; |
566 | ufd->d.s.ucred.gid = cred->gid; | |
9e5f2b29 | 567 | } |
568 | } | |
a8c5ada6 | 569 | #endif |
9e5f2b29 | 570 | } |
571 | } | |
572 | ||
02a705ad FT |
573 | static int ufddgram(struct ufd *ufd) |
574 | { | |
575 | int dgram; | |
576 | ||
577 | if(ufd->type == UFD_SOCK) { | |
578 | dgram = ufd->d.s.type == SOCK_DGRAM; | |
579 | } else if(ufd->type == UFD_PIPE) { | |
580 | dgram = 0; | |
581 | } else { | |
582 | flog(LOG_ERR, "BUG: calling ufddgram on ufd of bad type %i", ufd->type); | |
583 | return(-1); | |
584 | } | |
585 | if(ufd->sk == NULL) { | |
586 | flog(LOG_ERR, "BUG: calling ufddgram on socketless ufd (type %i)", ufd->type); | |
587 | return(-1); | |
588 | } | |
589 | if(dgram != ufd->sk->dgram) { | |
590 | flog(LOG_ERR, "BUG: ufd/socket dgram value mismatch"); | |
591 | return(-1); | |
592 | } | |
593 | return(dgram); | |
594 | } | |
595 | ||
596 | static void sockrecv(struct ufd *ufd) | |
d3372da9 | 597 | { |
598 | int ret, inq; | |
02a705ad | 599 | int dgram; |
d3372da9 | 600 | struct dgrambuf *dbuf; |
9e5f2b29 | 601 | struct msghdr msg; |
602 | char cbuf[65536]; | |
603 | struct iovec bufvec; | |
02a705ad | 604 | void *buf; |
d3372da9 | 605 | |
9e5f2b29 | 606 | memset(&msg, 0, sizeof(msg)); |
607 | msg.msg_iov = &bufvec; | |
608 | msg.msg_iovlen = 1; | |
609 | msg.msg_control = cbuf; | |
610 | msg.msg_controllen = sizeof(cbuf); | |
02a705ad FT |
611 | if((dgram = ufddgram(ufd)) < 0) |
612 | return; | |
613 | if(dgram) { | |
9e5f2b29 | 614 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
02a705ad | 615 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
d3372da9 | 616 | { |
617 | /* I don't really know what could go wrong here, so let's | |
618 | * assume it's transient. */ | |
02a705ad | 619 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), ufd->fd); |
d3372da9 | 620 | return; |
621 | } | |
9e5f2b29 | 622 | #else |
623 | inq = 65536; | |
624 | #endif | |
d3372da9 | 625 | dbuf = smalloc(sizeof(*dbuf)); |
626 | dbuf->data = smalloc(inq); | |
627 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 628 | msg.msg_name = dbuf->addr; |
629 | msg.msg_namelen = dbuf->addrlen; | |
630 | bufvec.iov_base = dbuf->data; | |
631 | bufvec.iov_len = inq; | |
02a705ad | 632 | ret = recvmsg(ufd->fd, &msg, 0); |
9e5f2b29 | 633 | dbuf->addrlen = msg.msg_namelen; |
d3372da9 | 634 | if(ret < 0) |
635 | { | |
02a705ad | 636 | freedgbuf(dbuf); |
d3372da9 | 637 | if((errno == EINTR) || (errno == EAGAIN)) |
638 | return; | |
02a705ad FT |
639 | closeufd(ufd); |
640 | sockerror(ufd->sk, errno); | |
d3372da9 | 641 | return; |
642 | } | |
9e5f2b29 | 643 | if(msg.msg_flags & MSG_CTRUNC) |
644 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
645 | else | |
02a705ad | 646 | recvcmsg(ufd, &msg); |
d3372da9 | 647 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
648 | * have EOF), but rather an empty packet. I don't know if any | |
649 | * other potential DGRAM protocols might have an EOF | |
650 | * condition, so let's play safe. */ | |
651 | if(ret == 0) | |
652 | { | |
02a705ad FT |
653 | freedgbuf(dbuf); |
654 | if((ufd->type != UFD_SOCK) || !((ufd->d.s.family == AF_INET) || (ufd->d.s.family == AF_INET6))) | |
d3372da9 | 655 | { |
40c21c4f | 656 | closesock(ufd->sk); |
02a705ad | 657 | closeufd(ufd); |
d3372da9 | 658 | } |
659 | return; | |
660 | } | |
661 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
662 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
663 | dbuf->next = NULL; | |
02a705ad FT |
664 | sockqueuedg(ufd->sk, dbuf); |
665 | } else { | |
666 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
667 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
668 | * how to read the inqueue size on other OSs */ | |
669 | if(ufd->type == UFD_SOCK) { | |
670 | if(ioctl(ufd->fd, SIOCINQ, &inq)) | |
671 | { | |
672 | /* I don't really know what could go wrong here, so let's | |
673 | * assume it's transient. */ | |
674 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), ufd->fd); | |
675 | inq = 2048; | |
676 | } | |
677 | } else { | |
678 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
679 | inq = 65536; | |
680 | } | |
681 | #else | |
682 | inq = 2048; | |
683 | #endif | |
684 | if(inq > 65536) | |
685 | inq = 65536; | |
686 | /* This part could be optimized by telling the kernel to read | |
687 | * directly into ufd->sk->back->buf, but that would be uglier | |
688 | * by not using the socket function interface. */ | |
689 | buf = smalloc(inq); | |
690 | if(ufd->type == UFD_SOCK) | |
691 | { | |
692 | bufvec.iov_base = buf; | |
693 | bufvec.iov_len = inq; | |
694 | ret = recvmsg(ufd->fd, &msg, 0); | |
695 | } else { | |
696 | ret = read(ufd->fd, buf, inq); | |
697 | msg.msg_controllen = 0; | |
698 | msg.msg_flags = 0; | |
699 | } | |
700 | if(ret < 0) | |
701 | { | |
702 | free(buf); | |
703 | if((errno == EINTR) || (errno == EAGAIN)) | |
704 | return; | |
705 | closeufd(ufd); | |
706 | sockerror(ufd->sk, errno); | |
707 | return; | |
708 | } | |
709 | if(msg.msg_flags & MSG_CTRUNC) | |
710 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
d3372da9 | 711 | else |
02a705ad FT |
712 | recvcmsg(ufd, &msg); |
713 | if(ret == 0) | |
714 | { | |
715 | free(buf); | |
716 | closeufd(ufd); | |
40c21c4f | 717 | closesock(ufd->sk); |
02a705ad FT |
718 | return; |
719 | } | |
720 | sockqueue(ufd->sk, buf, ret); | |
721 | free(buf); | |
d3372da9 | 722 | } |
723 | } | |
724 | ||
89d650f1 | 725 | static int sockflush(struct ufd *ufd) |
d3372da9 | 726 | { |
727 | int ret; | |
728 | struct dgrambuf *dbuf; | |
02a705ad | 729 | int dgram; |
d3372da9 | 730 | |
89d650f1 FT |
731 | if((dgram = ufddgram(ufd)) < 0) { |
732 | errno = EBADFD; | |
733 | return(-1); | |
734 | } | |
02a705ad FT |
735 | if(dgram) { |
736 | dbuf = sockgetdgbuf(ufd->sk); | |
737 | sendto(ufd->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
738 | freedgbuf(dbuf); | |
739 | } else { | |
740 | if(ufd->type == UFD_SOCK) | |
741 | ret = send(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
d3372da9 | 742 | else |
02a705ad | 743 | ret = write(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize); |
89d650f1 FT |
744 | if(ret < 0) |
745 | return(-1); | |
02a705ad FT |
746 | if(ret > 0) { |
747 | memmove(ufd->sk->buf.s.buf, ((char *)ufd->sk->buf.s.buf) + ret, ufd->sk->buf.s.datasize -= ret); | |
748 | sockread(ufd->sk); | |
d3372da9 | 749 | } |
d3372da9 | 750 | } |
89d650f1 | 751 | return(0); |
d3372da9 | 752 | } |
753 | ||
754 | void closesock(struct socket *sk) | |
755 | { | |
02a705ad | 756 | sksetstate(sk, SOCK_STL); |
40c21c4f FT |
757 | if(sk->back->eos == 0) |
758 | sk->back->eos = 1; | |
759 | linksock(&rbatch, sk->back); | |
d3372da9 | 760 | } |
761 | ||
762 | size_t sockgetdatalen(struct socket *sk) | |
763 | { | |
764 | struct dgrambuf *b; | |
765 | size_t ret; | |
766 | ||
02a705ad | 767 | if(sk->dgram) { |
d3372da9 | 768 | ret = 0; |
02a705ad | 769 | for(b = sk->buf.d.f; b != NULL; b = b->next) |
d3372da9 | 770 | ret += b->size; |
02a705ad FT |
771 | } else { |
772 | ret = sk->buf.s.datasize; | |
d3372da9 | 773 | } |
774 | return(ret); | |
775 | } | |
776 | ||
81286a22 FT |
777 | /* size_t sockqueuesize(struct socket *sk) */ |
778 | /* { */ | |
779 | /* return(sockgetdatalen(sk->back)); */ | |
780 | /* } */ | |
781 | ||
1ff9e8ea FT |
782 | size_t socktqueuesize(struct socket *sk) |
783 | { | |
784 | size_t ret; | |
785 | ||
786 | ret = 0; | |
787 | while(1) { | |
788 | ret += sockgetdatalen(sk->back); | |
789 | if((sk = sk->back->pnext) == NULL) | |
790 | return(ret); | |
791 | } | |
792 | } | |
793 | ||
81286a22 | 794 | ssize_t sockqueueleft(struct socket *sk) |
d3372da9 | 795 | { |
81286a22 | 796 | return(sk->back->maxbuf - sockgetdatalen(sk->back)); |
d3372da9 | 797 | } |
798 | ||
d3372da9 | 799 | /* |
7ab36fbd | 800 | * Seriously, I don't know if it's naughty or not to remove |
801 | * pre-existing Unix sockets. | |
802 | */ | |
02a705ad | 803 | static int rebindunix(struct ufd *ufd, struct sockaddr *name, socklen_t namelen) |
7ab36fbd | 804 | { |
805 | struct sockaddr_un *un; | |
806 | struct stat sb; | |
807 | ||
02a705ad | 808 | if((ufd->d.l.family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
7ab36fbd | 809 | return(-1); |
810 | un = (struct sockaddr_un *)name; | |
811 | if(stat(un->sun_path, &sb)) | |
812 | return(-1); | |
813 | if(!S_ISSOCK(sb.st_mode)) | |
814 | return(-1); | |
815 | if(unlink(un->sun_path)) | |
816 | return(-1); | |
02a705ad | 817 | if(bind(ufd->fd, name, namelen) < 0) |
7ab36fbd | 818 | return(-1); |
819 | return(0); | |
820 | } | |
821 | ||
f96d0914 FT |
822 | void closelport(struct lport *lp) |
823 | { | |
40c21c4f FT |
824 | struct ufd *ufd; |
825 | struct sockaddr_un *un; | |
826 | ||
827 | ufd = lp->ufd; | |
828 | if((ufd->d.l.family == AF_UNIX) && !getlocalname(ufd->fd, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX) && strchr(un->sun_path, '/')) { | |
829 | if(unlink(un->sun_path)) | |
830 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); | |
831 | } | |
f96d0914 FT |
832 | freeufd(lp->ufd); |
833 | } | |
834 | ||
7ab36fbd | 835 | /* |
d3372da9 | 836 | * The difference between netcslisten() and netcslistenlocal() is that |
837 | * netcslistenlocal() always listens on the local host, instead of | |
838 | * following proxy/passive mode directions. It is suitable for eg. the | |
839 | * UI channel, while the file sharing networks should, naturally, use | |
840 | * netcslisten() instead. | |
841 | */ | |
842 | ||
02a705ad | 843 | struct lport *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
d3372da9 | 844 | { |
02a705ad FT |
845 | struct lport *lp; |
846 | struct ufd *ufd; | |
847 | int fd; | |
66c517d2 | 848 | int intbuf; |
d3372da9 | 849 | |
850 | /* I don't know if this is actually correct (it probably isn't), | |
851 | * but since, at on least Linux systems, PF_* are specifically | |
852 | * #define'd to their AF_* counterparts, it allows for a severely | |
853 | * smoother implementation. If it breaks something on your | |
854 | * platform, please tell me so. | |
855 | */ | |
02a705ad | 856 | if((fd = socket(name->sa_family, type, 0)) < 0) |
d3372da9 | 857 | return(NULL); |
02a705ad | 858 | if(confgetint("net", "reuseaddr")) { |
687b2ee2 | 859 | intbuf = 1; |
02a705ad | 860 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
687b2ee2 | 861 | } |
02a705ad | 862 | ufd = mkufd(fd, UFD_LISTEN, NULL); |
02a705ad | 863 | ufd->d.l.family = name->sa_family; |
f96d0914 FT |
864 | lp = memset(smalloc(sizeof(*lp)), 0, sizeof(*lp)); |
865 | lp->ufd = ufd; | |
866 | ufd->d.l.lp = lp; | |
02a705ad FT |
867 | if((bind(fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(ufd, name, namelen) < 0))) { |
868 | freeufd(ufd); | |
d3372da9 | 869 | return(NULL); |
870 | } | |
02a705ad | 871 | if(listen(fd, 16) < 0) |
d3372da9 | 872 | { |
02a705ad | 873 | freeufd(ufd); |
d3372da9 | 874 | return(NULL); |
875 | } | |
02a705ad FT |
876 | lp->acceptcb = func; |
877 | lp->data = data; | |
878 | return(lp); | |
d3372da9 | 879 | } |
880 | ||
02a705ad | 881 | struct lport *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
c23acc61 | 882 | { |
883 | if(confgetint("net", "mode") == 1) | |
884 | { | |
885 | errno = EOPNOTSUPP; | |
886 | return(NULL); | |
887 | } | |
c23acc61 | 888 | if(confgetint("net", "mode") == 0) |
889 | return(netcslistenlocal(type, name, namelen, func, data)); | |
890 | errno = EOPNOTSUPP; | |
891 | return(NULL); | |
892 | } | |
893 | ||
02a705ad | 894 | struct lport *netcstcplisten(int port, int local, void (*func)(struct lport *, struct socket *, void *), void *data) |
0a1bc5b1 | 895 | { |
896 | struct sockaddr_in addr; | |
897 | #ifdef HAVE_IPV6 | |
898 | struct sockaddr_in6 addr6; | |
899 | #endif | |
02a705ad FT |
900 | struct lport *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct lport *, struct socket *, void *), void *); |
901 | struct lport *ret; | |
0a1bc5b1 | 902 | |
903 | if(local) | |
904 | csfunc = netcslistenlocal; | |
905 | else | |
906 | csfunc = netcslisten; | |
907 | #ifdef HAVE_IPV6 | |
908 | memset(&addr6, 0, sizeof(addr6)); | |
909 | addr6.sin6_family = AF_INET6; | |
910 | addr6.sin6_port = htons(port); | |
911 | addr6.sin6_addr = in6addr_any; | |
912 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
913 | return(ret); | |
914 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
915 | return(NULL); | |
916 | #endif | |
917 | memset(&addr, 0, sizeof(addr)); | |
918 | addr.sin_family = AF_INET; | |
919 | addr.sin_port = htons(port); | |
920 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
921 | } | |
922 | ||
d3372da9 | 923 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
924 | { | |
925 | struct socket *sk; | |
926 | int mode; | |
927 | ||
928 | mode = confgetint("net", "mode"); | |
929 | if((mode == 0) || (mode == 1)) | |
930 | { | |
931 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
932 | return(NULL); | |
02a705ad | 933 | if(bind(sk->ufd->fd, name, namelen) < 0) |
d3372da9 | 934 | { |
935 | putsock(sk); | |
936 | return(NULL); | |
937 | } | |
02a705ad FT |
938 | sksetstate(sk, SOCK_EST); |
939 | return(sk->back); | |
d3372da9 | 940 | } |
941 | errno = EOPNOTSUPP; | |
942 | return(NULL); | |
943 | } | |
944 | ||
02a705ad | 945 | struct socket *netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
d3372da9 | 946 | { |
02a705ad | 947 | struct ufd *nufd; |
d3372da9 | 948 | |
02a705ad | 949 | nufd = dupufd(sk->back->ufd); |
5afb0d14 | 950 | getsock(sk = nufd->sk->back); |
02a705ad FT |
951 | memcpy(nufd->d.s.remote = smalloc(addrlen), addr, nufd->d.s.remotelen = addrlen); |
952 | nufd->ignread = 1; | |
953 | return(sk); | |
d3372da9 | 954 | } |
955 | ||
cab0b442 | 956 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 957 | { |
958 | struct socket *sk; | |
959 | int mode; | |
960 | ||
961 | mode = confgetint("net", "mode"); | |
962 | if((mode == 0) || (mode == 1)) | |
963 | { | |
964 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
965 | return(NULL); | |
02a705ad FT |
966 | memcpy(sk->ufd->d.s.remote = smalloc(addrlen), addr, sk->ufd->d.s.remotelen = addrlen); |
967 | sk->back->conncb = func; | |
968 | sk->back->data = data; | |
969 | if(!connect(sk->ufd->fd, addr, addrlen)) | |
d3372da9 | 970 | { |
02a705ad FT |
971 | sksetstate(sk, SOCK_EST); |
972 | linksock(&cbatch, sk->back); | |
973 | return(sk->back); | |
d3372da9 | 974 | } |
975 | if(errno == EINPROGRESS) | |
976 | { | |
02a705ad FT |
977 | sksetstate(sk, SOCK_SYN); |
978 | return(sk->back); | |
d3372da9 | 979 | } |
980 | putsock(sk); | |
981 | return(NULL); | |
982 | } | |
983 | errno = EOPNOTSUPP; | |
984 | return(NULL); | |
985 | } | |
986 | ||
02a705ad | 987 | static void acceptunix(struct ufd *ufd) |
9e5f2b29 | 988 | { |
989 | int buf; | |
990 | ||
991 | buf = 1; | |
a8c5ada6 | 992 | #if UNIX_AUTH_STYLE == 1 |
02a705ad FT |
993 | if(setsockopt(ufd->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
994 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", ufd->fd, strerror(errno)); | |
a8c5ada6 | 995 | #elif UNIX_AUTH_STYLE == 2 |
02a705ad | 996 | if(getpeereid(ufd->fd, &ufd->d.s.ucred.uid, &ufd->d.s.ucred.gid) < 0) |
a8c5ada6 | 997 | { |
02a705ad FT |
998 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", ufd->fd, strerror(errno)); |
999 | ufd->d.s.ucred.uid = -1; | |
1000 | ufd->d.s.ucred.gid = -1; | |
a8c5ada6 | 1001 | } |
1002 | #endif | |
9e5f2b29 | 1003 | } |
1004 | ||
f96d0914 FT |
1005 | static void runbatches(void) |
1006 | { | |
1007 | struct scons *sc, *nsc; | |
1008 | ||
1009 | for(sc = cbatch, cbatch = NULL; sc; sc = nsc) { | |
1010 | nsc = sc->n; | |
5afb0d14 FT |
1011 | if(sc->s->conncb != NULL) |
1012 | sc->s->conncb(sc->s, 0, sc->s->data); | |
834b0aa6 | 1013 | putsock(sc->s); |
f96d0914 FT |
1014 | free(sc); |
1015 | } | |
1016 | for(sc = rbatch, rbatch = NULL; sc; sc = nsc) { | |
1017 | nsc = sc->n; | |
5afb0d14 FT |
1018 | if(sc->s->readcb != NULL) |
1019 | sc->s->readcb(sc->s, sc->s->data); | |
1020 | if((sockgetdatalen(sc->s) == 0) && (sc->s->eos == 1)) { | |
1021 | if(sc->s->errcb != NULL) | |
1022 | sc->s->errcb(sc->s, 0, sc->s->data); | |
1023 | sc->s->eos = 2; | |
1024 | } | |
834b0aa6 | 1025 | putsock(sc->s); |
f96d0914 FT |
1026 | free(sc); |
1027 | } | |
1028 | for(sc = wbatch, wbatch = NULL; sc; sc = nsc) { | |
1029 | nsc = sc->n; | |
5afb0d14 FT |
1030 | if(sc->s->writecb != NULL) |
1031 | sc->s->writecb(sc->s, sc->s->data); | |
834b0aa6 | 1032 | putsock(sc->s); |
f96d0914 FT |
1033 | free(sc); |
1034 | } | |
1035 | } | |
1036 | ||
5afb0d14 FT |
1037 | static void cleansocks(void) |
1038 | { | |
1039 | struct ufd *ufd, *next; | |
1040 | ||
1041 | for(ufd = ufds; ufd != NULL; ufd = next) { | |
1042 | next = ufd->next; | |
834b0aa6 | 1043 | if(ufd->sk && ((ufd->fd < 0) || (sockgetdatalen(ufd->sk) == 0))) { |
5afb0d14 FT |
1044 | if(ufd->sk->eos == 1) { |
1045 | ufd->sk->eos = 2; | |
1046 | closeufd(ufd); | |
1047 | closesock(ufd->sk); | |
1048 | } | |
1049 | if((ufd->sk->refcount == 1) && (ufd->sk->back->refcount == 0)) { | |
1050 | freeufd(ufd); | |
1051 | continue; | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | ||
d3372da9 | 1057 | int pollsocks(int timeout) |
1058 | { | |
02a705ad | 1059 | int ret; |
eaa35963 | 1060 | socklen_t retlen; |
72a7835e FT |
1061 | int newfd, maxfd; |
1062 | fd_set rfds, wfds, efds; | |
5afb0d14 | 1063 | struct ufd *ufd, *nufd; |
02a705ad | 1064 | struct socket *nsk; |
d3372da9 | 1065 | struct sockaddr_storage ss; |
1066 | socklen_t sslen; | |
72a7835e | 1067 | struct timeval tv; |
d3372da9 | 1068 | |
5afb0d14 | 1069 | cleansocks(); |
72a7835e FT |
1070 | FD_ZERO(&rfds); |
1071 | FD_ZERO(&wfds); | |
1072 | FD_ZERO(&efds); | |
02a705ad FT |
1073 | for(maxfd = 0, ufd = ufds; ufd != NULL; ufd = ufd->next) { |
1074 | if(ufd->fd < 0) | |
d3372da9 | 1075 | continue; |
81286a22 | 1076 | if(!ufd->ignread && ((ufd->sk == NULL) || (sockqueueleft(ufd->sk) > 0))) |
02a705ad FT |
1077 | FD_SET(ufd->fd, &rfds); |
1078 | if(ufd->sk != NULL) { | |
1079 | if(sockgetdatalen(ufd->sk) > 0) | |
1080 | FD_SET(ufd->fd, &wfds); | |
1081 | else if(ufd->sk->state == SOCK_SYN) | |
1082 | FD_SET(ufd->fd, &wfds); | |
1083 | } | |
1084 | FD_SET(ufd->fd, &efds); | |
1085 | if(ufd->fd > maxfd) | |
1086 | maxfd = ufd->fd; | |
d3372da9 | 1087 | } |
5afb0d14 FT |
1088 | if(rbatch || wbatch || cbatch) |
1089 | timeout = 0; | |
72a7835e FT |
1090 | tv.tv_sec = timeout / 1000; |
1091 | tv.tv_usec = (timeout % 1000) * 1000; | |
1092 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
02a705ad FT |
1093 | if(ret < 0) { |
1094 | if(errno != EINTR) { | |
72a7835e | 1095 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 1096 | /* To avoid CPU hogging in case it's bad, which it |
1097 | * probably is. */ | |
1098 | sleep(1); | |
1099 | } | |
d3372da9 | 1100 | return(1); |
1101 | } | |
5afb0d14 | 1102 | for(ufd = ufds; ufd != NULL; ufd = ufd->next) { |
02a705ad FT |
1103 | if(ufd->sk < 0) |
1104 | continue; | |
1105 | if(ufd->type == UFD_LISTEN) { | |
1106 | if(FD_ISSET(ufd->fd, &rfds)) { | |
d3372da9 | 1107 | sslen = sizeof(ss); |
02a705ad FT |
1108 | if((newfd = accept(ufd->fd, (struct sockaddr *)&ss, &sslen)) < 0) { |
1109 | if(ufd->d.l.lp->errcb != NULL) | |
1110 | ufd->d.l.lp->errcb(ufd->d.l.lp, errno, ufd->d.l.lp->data); | |
cab0b442 | 1111 | } |
02a705ad FT |
1112 | nsk = sockpair(0); |
1113 | nufd = mkufd(newfd, UFD_SOCK, nsk); | |
1114 | nufd->d.s.family = ufd->d.l.family; | |
1115 | sksetstate(nsk, SOCK_EST); | |
1116 | memcpy(nufd->d.s.remote = smalloc(sslen), &ss, sslen); | |
1117 | nufd->d.s.remotelen = sslen; | |
9e5f2b29 | 1118 | if(ss.ss_family == PF_UNIX) |
02a705ad FT |
1119 | acceptunix(nufd); |
1120 | if(ufd->d.l.lp->acceptcb != NULL) | |
5afb0d14 | 1121 | ufd->d.l.lp->acceptcb(ufd->d.l.lp, nsk->back, ufd->d.l.lp->data); |
02a705ad | 1122 | putsock(nsk); |
d3372da9 | 1123 | } |
02a705ad | 1124 | if(FD_ISSET(ufd->fd, &efds)) { |
d3372da9 | 1125 | retlen = sizeof(ret); |
02a705ad FT |
1126 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
1127 | if(ufd->d.l.lp->errcb != NULL) | |
1128 | ufd->d.l.lp->errcb(ufd->d.l.lp, ret, ufd->d.l.lp->data); | |
d3372da9 | 1129 | continue; |
1130 | } | |
02a705ad FT |
1131 | } else { |
1132 | if(ufd->sk->state == SOCK_SYN) { | |
1133 | if(FD_ISSET(ufd->fd, &efds)) { | |
1134 | retlen = sizeof(ret); | |
1135 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1136 | if(ufd->sk->back->conncb != NULL) | |
1137 | ufd->sk->back->conncb(ufd->sk->back, ret, ufd->sk->back->data); | |
1138 | closeufd(ufd); | |
1139 | continue; | |
1140 | } | |
1141 | if(FD_ISSET(ufd->fd, &rfds) || FD_ISSET(ufd->fd, &wfds)) { | |
1142 | sksetstate(ufd->sk, SOCK_EST); | |
1143 | linksock(&cbatch, ufd->sk->back); | |
1144 | } | |
1145 | } else if(ufd->sk->state == SOCK_EST) { | |
1146 | if(FD_ISSET(ufd->fd, &efds)) { | |
1147 | retlen = sizeof(ret); | |
1148 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1149 | sockerror(ufd->sk, ret); | |
1150 | closeufd(ufd); | |
1151 | continue; | |
1152 | } | |
1153 | if(FD_ISSET(ufd->fd, &rfds)) | |
1154 | sockrecv(ufd); | |
5afb0d14 FT |
1155 | if(ufd->fd == -1) |
1156 | continue; | |
89d650f1 FT |
1157 | if(FD_ISSET(ufd->fd, &wfds)) { |
1158 | if(sockflush(ufd)) { | |
1159 | sockerror(ufd->sk, errno); | |
1160 | closeufd(ufd); | |
1161 | continue; | |
1162 | } | |
1163 | } | |
d3372da9 | 1164 | } |
d3372da9 | 1165 | } |
d3372da9 | 1166 | } |
f96d0914 | 1167 | runbatches(); |
5afb0d14 | 1168 | cleansocks(); |
d3372da9 | 1169 | return(1); |
1170 | } | |
1171 | ||
f96d0914 FT |
1172 | static struct ufd *getskufd(struct socket *sk) |
1173 | { | |
1174 | while(1) { | |
1175 | if(sk->back->ufd != NULL) | |
1176 | return(sk->back->ufd); | |
1177 | if((sk = sk->back->pnext) == NULL) | |
1178 | break; | |
1179 | } | |
1180 | return(NULL); | |
1181 | } | |
1182 | ||
d3372da9 | 1183 | int socksettos(struct socket *sk, int tos) |
1184 | { | |
b020fb3d | 1185 | int buf; |
f96d0914 | 1186 | struct ufd *ufd; |
b020fb3d | 1187 | |
f96d0914 FT |
1188 | ufd = getskufd(sk); |
1189 | if(ufd->type != UFD_SOCK) { | |
1190 | errno = EOPNOTSUPP; | |
1191 | return(-1); | |
1192 | } | |
1193 | if(ufd->d.s.family == AF_UNIX) | |
7ab36fbd | 1194 | return(0); /* Unix sockets are always perfect. :) */ |
f96d0914 | 1195 | if(ufd->d.s.family == AF_INET) |
d3372da9 | 1196 | { |
b020fb3d | 1197 | switch(tos) |
1198 | { | |
b198bed6 | 1199 | case 0: |
1200 | buf = 0; | |
1201 | break; | |
b020fb3d | 1202 | case SOCK_TOS_MINCOST: |
18c1ae1d | 1203 | buf = 0x02; |
b020fb3d | 1204 | break; |
1205 | case SOCK_TOS_MAXREL: | |
18c1ae1d | 1206 | buf = 0x04; |
b020fb3d | 1207 | break; |
1208 | case SOCK_TOS_MAXTP: | |
18c1ae1d | 1209 | buf = 0x08; |
b020fb3d | 1210 | break; |
1211 | case SOCK_TOS_MINDELAY: | |
18c1ae1d | 1212 | buf = 0x10; |
b020fb3d | 1213 | break; |
1214 | default: | |
1215 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1216 | return(-1); | |
1217 | } | |
f96d0914 | 1218 | if(setsockopt(ufd->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1219 | { |
1220 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1221 | return(-1); | |
1222 | } | |
1223 | return(0); | |
1224 | } | |
f96d0914 | 1225 | if(ufd->d.s.family == AF_INET6) |
b020fb3d | 1226 | { |
1227 | switch(tos) | |
1228 | { | |
b198bed6 | 1229 | case 0: |
1230 | buf = 0; | |
b020fb3d | 1231 | case SOCK_TOS_MINCOST: |
1232 | buf = confgetint("net", "diffserv-mincost"); | |
1233 | break; | |
1234 | case SOCK_TOS_MAXREL: | |
1235 | buf = confgetint("net", "diffserv-maxrel"); | |
1236 | break; | |
1237 | case SOCK_TOS_MAXTP: | |
1238 | buf = confgetint("net", "diffserv-maxtp"); | |
1239 | break; | |
1240 | case SOCK_TOS_MINDELAY: | |
1241 | buf = confgetint("net", "diffserv-mindelay"); | |
1242 | break; | |
1243 | default: | |
1244 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1245 | return(-1); | |
1246 | } | |
1247 | /* | |
1248 | On Linux, the API IPv6 flow label management doesn't seem to | |
1249 | be entirely complete, so I guess this will have to wait. | |
1250 | ||
1251 | if(setsockopt(...) < 0) | |
1252 | { | |
1253 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1254 | return(-1); | |
1255 | } | |
1256 | */ | |
1257 | return(0); | |
1258 | } | |
f96d0914 | 1259 | flog(LOG_WARNING, "could not set TOS on sock of family %i", ufd->d.s.family); |
d3372da9 | 1260 | return(1); |
1261 | } | |
1262 | ||
1263 | struct resolvedata | |
1264 | { | |
1265 | int fd; | |
1266 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1267 | void *data; | |
1268 | struct sockaddr_storage addr; | |
1269 | int addrlen; | |
1270 | }; | |
1271 | ||
1272 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1273 | { | |
1274 | static char buf[80]; | |
1275 | int ret; | |
1276 | struct sockaddr_in *ipv4; | |
1277 | ||
1278 | if(!status) | |
1279 | { | |
1280 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1281 | { | |
b4d16e90 | 1282 | errno = ENOENT; |
d3372da9 | 1283 | data->callback(NULL, 0, data->data); |
1284 | } else { | |
1285 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1286 | memcpy(&ipv4->sin_addr, buf, 4); | |
1287 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1288 | } | |
1289 | } else { | |
b4d16e90 | 1290 | errno = ENOENT; |
d3372da9 | 1291 | data->callback(NULL, 0, data->data); |
1292 | } | |
1293 | close(data->fd); | |
1294 | free(data); | |
1295 | } | |
1296 | ||
1297 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1298 | { | |
1299 | int i; | |
1300 | char *p; | |
1301 | int port; | |
1302 | int pfd[2]; | |
1303 | pid_t child; | |
1304 | struct resolvedata *rdata; | |
1305 | struct sockaddr_in ipv4; | |
1306 | struct hostent *he; | |
1307 | sigset_t sigset; | |
1308 | ||
1309 | /* IPv4 */ | |
1310 | port = -1; | |
1311 | if((p = strchr(addr, ':')) != NULL) | |
1312 | { | |
1313 | *p = 0; | |
1314 | port = atoi(p + 1); | |
1315 | } | |
1316 | ipv4.sin_family = AF_INET; | |
1317 | ipv4.sin_port = htons(port); | |
1318 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1319 | { | |
1320 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1321 | } else { | |
1322 | sigemptyset(&sigset); | |
1323 | sigaddset(&sigset, SIGCHLD); | |
1324 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1325 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1326 | { | |
1327 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1328 | return(-1); | |
1329 | } | |
1330 | if(child == 0) | |
1331 | { | |
1332 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1333 | for(i = 3; i < FD_SETSIZE; i++) | |
1334 | { | |
1335 | if(i != pfd[1]) | |
1336 | close(i); | |
1337 | } | |
1338 | signal(SIGALRM, SIG_DFL); | |
1339 | alarm(30); | |
1340 | if((he = gethostbyname(addr)) == NULL) | |
1341 | exit(1); | |
1342 | write(pfd[1], he->h_addr_list[0], 4); | |
1343 | exit(0); | |
1344 | } else { | |
1345 | close(pfd[1]); | |
1346 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1347 | rdata = smalloc(sizeof(*rdata)); | |
1348 | rdata->fd = pfd[0]; | |
1349 | rdata->callback = callback; | |
1350 | rdata->data = data; | |
1351 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1352 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1353 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1354 | return(1); | |
1355 | } | |
1356 | } | |
1357 | return(0); | |
1358 | } | |
1359 | ||
f96d0914 | 1360 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
d3372da9 | 1361 | { |
1362 | socklen_t len; | |
1363 | struct sockaddr_storage name; | |
1364 | ||
1365 | *namebuf = NULL; | |
f96d0914 | 1366 | if(fd < 0) |
d3372da9 | 1367 | return(-1); |
1368 | len = sizeof(name); | |
f96d0914 | 1369 | if(getsockname(fd, (struct sockaddr *)&name, &len) < 0) |
d3372da9 | 1370 | { |
6fb0c6ac | 1371 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1372 | return(-1); |
1373 | } | |
1374 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1375 | if(lenbuf != NULL) |
1376 | *lenbuf = len; | |
d3372da9 | 1377 | return(0); |
1378 | } | |
1379 | ||
f96d0914 FT |
1380 | int lstgetlocalname(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
1381 | { | |
1382 | struct ufd *ufd; | |
1383 | ||
1384 | ufd = lp->ufd; | |
1385 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1386 | } | |
1387 | ||
1388 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1389 | { | |
1390 | struct ufd *ufd; | |
1391 | ||
1392 | ufd = getskufd(sk); | |
1393 | if(ufd->type != UFD_SOCK) { | |
1394 | errno = EOPNOTSUPP; | |
1395 | return(-1); | |
1396 | } | |
1397 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1398 | } | |
1399 | ||
eaa35963 | 1400 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1401 | { | |
1402 | if(dst->sa_family != src->sa_family) | |
1403 | { | |
1404 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1405 | return; | |
1406 | } | |
1407 | switch(src->sa_family) | |
1408 | { | |
1409 | case AF_INET: | |
1410 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1411 | break; | |
1412 | case AF_INET6: | |
1413 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1414 | break; | |
1415 | default: | |
1416 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1417 | break; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1422 | { |
6fb0c6ac | 1423 | int ret; |
eaa35963 | 1424 | socklen_t plen; |
1425 | struct sockaddr *pname; | |
1426 | ||
1427 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1428 | { | |
1429 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1430 | return(-1); | |
1431 | } | |
1432 | if(ret) | |
1433 | return(0); | |
1434 | sethostaddr(addr, pname); | |
1435 | free(pname); | |
1436 | return(0); | |
1437 | } | |
1438 | ||
f96d0914 | 1439 | static int getremotename(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
eaa35963 | 1440 | { |
d3372da9 | 1441 | socklen_t len; |
6fb0c6ac | 1442 | struct sockaddr *name; |
f96d0914 FT |
1443 | |
1444 | switch(confgetint("net", "mode")) { | |
d3372da9 | 1445 | case 0: |
1446 | *namebuf = NULL; | |
f96d0914 | 1447 | if(!getlocalname(fd, &name, &len)) { |
6fb0c6ac | 1448 | *namebuf = name; |
1449 | *lenbuf = len; | |
eaa35963 | 1450 | makepublic(name); |
6fb0c6ac | 1451 | return(0); |
1452 | } | |
1453 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1454 | return(-1); | |
d3372da9 | 1455 | case 1: |
1456 | errno = EOPNOTSUPP; | |
1457 | return(-1); | |
1458 | default: | |
1459 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1460 | errno = EOPNOTSUPP; | |
1461 | return(-1); | |
1462 | } | |
1463 | } | |
1464 | ||
f96d0914 FT |
1465 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1466 | { | |
1467 | struct ufd *ufd; | |
1468 | ||
1469 | ufd = getskufd(sk); | |
1470 | if(ufd->type != UFD_SOCK) { | |
1471 | errno = EOPNOTSUPP; | |
1472 | return(-1); | |
1473 | } | |
1474 | if(ufd->fd < 0) { | |
1475 | errno = EBADF; | |
1476 | return(-1); | |
1477 | } | |
1478 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1479 | } | |
1480 | ||
1481 | int lstgetremotename(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1482 | { | |
1483 | struct ufd *ufd; | |
1484 | ||
1485 | ufd = lp->ufd; | |
1486 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1487 | } | |
1488 | ||
d29853b1 | 1489 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1490 | { | |
1491 | struct sockaddr *name1, *name2; | |
1492 | socklen_t len1, len2; | |
f96d0914 FT |
1493 | struct ufd *ufd1, *ufd2; |
1494 | ||
1495 | ufd1 = getskufd(sk); | |
1496 | ufd2 = getskufd(sk2); | |
1497 | if((ufd1->type != UFD_SOCK) || (ufd2->type != UFD_SOCK)) { | |
1498 | errno = EOPNOTSUPP; | |
1499 | return(-1); | |
1500 | } | |
1501 | if(ufd1->d.s.family != ufd2->d.s.family) | |
1502 | { | |
1503 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); | |
1504 | return(-1); | |
1505 | } | |
1506 | if(getremotename(ufd1->fd, &name1, &len1)) | |
1507 | return(-1); | |
1508 | if(getremotename(ufd2->fd, &name2, &len2)) { | |
1509 | free(name1); | |
1510 | return(-1); | |
1511 | } | |
1512 | sethostaddr(name1, name2); | |
1513 | free(name2); | |
1514 | *namebuf = name1; | |
1515 | *lenbuf = len1; | |
1516 | return(0); | |
1517 | } | |
1518 | ||
1519 | int lstgetremotename2(struct lport *lp, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1520 | { | |
1521 | struct sockaddr *name1, *name2; | |
1522 | socklen_t len1, len2; | |
1523 | struct ufd *ufd1, *ufd2; | |
d29853b1 | 1524 | |
f96d0914 FT |
1525 | ufd1 = lp->ufd; |
1526 | ufd2 = getskufd(sk2); | |
1527 | if(ufd2->type != UFD_SOCK) { | |
1528 | errno = EOPNOTSUPP; | |
1529 | return(-1); | |
1530 | } | |
d334fbb5 | 1531 | if(ufd1->d.l.family != ufd2->d.s.family) |
d29853b1 | 1532 | { |
d334fbb5 | 1533 | flog(LOG_ERR, "using lstgetremotename2 with sockets of differing family: %i %i", ufd1->d.l.family, ufd2->d.s.family); |
d29853b1 | 1534 | return(-1); |
1535 | } | |
f96d0914 | 1536 | if(getremotename(ufd1->fd, &name1, &len1)) |
d29853b1 | 1537 | return(-1); |
f96d0914 | 1538 | if(getremotename(ufd2->fd, &name2, &len2)) { |
d29853b1 | 1539 | free(name1); |
1540 | return(-1); | |
1541 | } | |
1542 | sethostaddr(name1, name2); | |
1543 | free(name2); | |
1544 | *namebuf = name1; | |
1545 | *lenbuf = len1; | |
1546 | return(0); | |
1547 | } | |
1548 | ||
f96d0914 FT |
1549 | int getucred(struct socket *sk, uid_t *uid, gid_t *gid) |
1550 | { | |
1551 | struct ufd *ufd; | |
1552 | ||
1553 | ufd = getskufd(sk); | |
1554 | if(ufd->type != UFD_SOCK) { | |
1555 | errno = EOPNOTSUPP; | |
1556 | return(-1); | |
1557 | } | |
1558 | if(ufd->d.s.family != AF_UNIX) { | |
1559 | errno = EOPNOTSUPP; | |
1560 | return(-1); | |
1561 | } | |
1562 | *uid = ufd->d.s.ucred.uid; | |
1563 | *gid = ufd->d.s.ucred.gid; | |
1564 | return(0); | |
1565 | } | |
1566 | ||
81286a22 FT |
1567 | /* void sockblock(struct socket *sk, int block) */ |
1568 | /* { */ | |
1569 | /* struct ufd *ufd; */ | |
f96d0914 | 1570 | |
81286a22 FT |
1571 | /* ufd = getskufd(sk); */ |
1572 | /* ufd->ignread = block; */ | |
1573 | /* } */ | |
f96d0914 FT |
1574 | |
1575 | int sockfamily(struct socket *sk) | |
1576 | { | |
1577 | struct ufd *ufd; | |
1578 | ||
1579 | ufd = getskufd(sk); | |
1580 | if(ufd->type != UFD_SOCK) { | |
1581 | errno = EOPNOTSUPP; | |
1582 | return(-1); | |
1583 | } | |
1584 | return(ufd->d.s.family); | |
02a705ad FT |
1585 | } |
1586 | ||
1587 | int sockpeeraddr(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1588 | { | |
f96d0914 FT |
1589 | struct ufd *ufd; |
1590 | ||
1591 | ufd = getskufd(sk); | |
1592 | if(ufd->type != UFD_SOCK) { | |
1593 | errno = EOPNOTSUPP; | |
1594 | return(-1); | |
1595 | } | |
1596 | if(ufd->d.s.remote == NULL) | |
1597 | return(-1); | |
1598 | *namebuf = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, ufd->d.s.remotelen); | |
1599 | if(lenbuf != NULL) | |
1600 | *lenbuf = ufd->d.s.remotelen; | |
1601 | return(0); | |
02a705ad FT |
1602 | } |
1603 | ||
1604 | char *formatsockpeer(struct socket *sk) | |
1605 | { | |
1606 | struct sockaddr *name; | |
1607 | socklen_t nlen; | |
1608 | char *ret; | |
1609 | ||
1610 | if(sockpeeraddr(sk, &name, &nlen)) | |
1611 | return(NULL); | |
1612 | ret = formataddress(name, nlen); | |
1613 | free(name); | |
1614 | return(ret); | |
1615 | } | |
1616 | ||
99a28d47 | 1617 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1618 | { | |
1619 | struct sockaddr_un *u1, *u2; | |
1620 | struct sockaddr_in *n1, *n2; | |
1621 | #ifdef HAVE_IPV6 | |
1622 | struct sockaddr_in6 *s1, *s2; | |
1623 | #endif | |
1624 | ||
1625 | if(x->sa_family != y->sa_family) | |
1626 | return(0); | |
1627 | switch(x->sa_family) { | |
1628 | case AF_UNIX: | |
1629 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1630 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1631 | return(0); | |
1632 | break; | |
1633 | case AF_INET: | |
1634 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1635 | if(n1->sin_port != n2->sin_port) | |
1636 | return(0); | |
1637 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1638 | return(0); | |
1639 | break; | |
c8a729d7 | 1640 | #ifdef HAVE_IPV6 |
99a28d47 | 1641 | case AF_INET6: |
1642 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1643 | if(s1->sin6_port != s2->sin6_port) | |
1644 | return(0); | |
1645 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1646 | return(0); | |
1647 | break; | |
c8a729d7 | 1648 | #endif |
99a28d47 | 1649 | } |
1650 | return(1); | |
1651 | } | |
1652 | ||
d3372da9 | 1653 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1654 | { | |
d3372da9 | 1655 | struct sockaddr_in *ipv4; |
1656 | #ifdef HAVE_IPV6 | |
1657 | struct sockaddr_in6 *ipv6; | |
1658 | #endif | |
1659 | static char *ret = NULL; | |
1660 | char buf[1024]; | |
1661 | ||
1662 | if(ret != NULL) | |
1663 | free(ret); | |
1664 | ret = NULL; | |
1665 | switch(arg->sa_family) | |
1666 | { | |
1667 | case AF_UNIX: | |
6a97462e | 1668 | ret = sstrdup("Unix socket"); |
d3372da9 | 1669 | break; |
1670 | case AF_INET: | |
1671 | ipv4 = (struct sockaddr_in *)arg; | |
1672 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1673 | return(NULL); | |
1674 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1675 | break; | |
1676 | #ifdef HAVE_IPV6 | |
1677 | case AF_INET6: | |
1678 | ipv6 = (struct sockaddr_in6 *)arg; | |
1679 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1680 | return(NULL); | |
fc7f7735 | 1681 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1682 | break; |
1683 | #endif | |
1684 | default: | |
1685 | errno = EPFNOSUPPORT; | |
1686 | break; | |
1687 | } | |
1688 | return(ret); | |
1689 | } | |
1690 | ||
1691 | #if 0 | |
1692 | ||
1693 | /* | |
1694 | * It was very nice to use this, but it seems | |
1695 | * to mess things up, so I guess it has to go... :-( | |
1696 | */ | |
1697 | ||
1698 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1699 | { | |
1700 | struct sockaddr *arg; | |
1701 | socklen_t arglen; | |
1702 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1703 | * lowercase letters to 1, so I do this | |
1704 | * instead. */ | |
1705 | struct sockaddr_in *ipv4; | |
1706 | int ret; | |
1707 | ||
1708 | arg = *(struct sockaddr **)(args[0]); | |
1709 | arglen = *(socklen_t *)(args[1]); | |
1710 | switch(arg->sa_family) | |
1711 | { | |
1712 | case AF_UNIX: | |
1713 | UNIX = (struct sockaddr_un *)arg; | |
1714 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1715 | break; | |
1716 | case AF_INET: | |
1717 | ipv4 = (struct sockaddr_in *)arg; | |
1718 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1719 | break; | |
1720 | default: | |
1721 | ret = -1; | |
1722 | errno = EPFNOSUPPORT; | |
1723 | break; | |
1724 | } | |
1725 | return(ret); | |
1726 | } | |
1727 | ||
1728 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1729 | { | |
1730 | if(n > 0) | |
1731 | argtypes[0] = PA_POINTER; | |
1732 | if(n > 1) | |
1733 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1734 | * be an int, so I guess this should be | |
1735 | * safe. */ | |
1736 | return(2); | |
1737 | } | |
1738 | #endif | |
1739 | ||
1740 | static int init(int hup) | |
1741 | { | |
1742 | if(!hup) | |
1743 | { | |
1744 | /* | |
1745 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1746 | { | |
1747 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1748 | return(1); | |
1749 | } | |
1750 | */ | |
1751 | } | |
1752 | return(0); | |
1753 | } | |
1754 | ||
1755 | static void terminate(void) | |
1756 | { | |
f96d0914 FT |
1757 | /* |
1758 | while(ufds != NULL) | |
1759 | freeufd(ufds); | |
1760 | */ | |
d3372da9 | 1761 | } |
1762 | ||
1763 | static struct module me = | |
1764 | { | |
1765 | .name = "net", | |
1766 | .conf = | |
1767 | { | |
1768 | .vars = myvars | |
1769 | }, | |
1770 | .init = init, | |
1771 | .terminate = terminate | |
1772 | }; | |
1773 | ||
1774 | MODULE(me) |