Commit | Line | Data |
---|---|---|
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""}}, |
d9f89ef5 | 69 | /** The Diffserv value to use on IPv6 connections when the |
70 | * minimize cost TOS value is used (see the TOS VALUES | |
71 | * section). */ | |
b020fb3d | 72 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
d9f89ef5 | 73 | /** The Diffserv value to use on IPv6 connections when the |
74 | * maximize reliability TOS value is used (see the TOS VALUES | |
75 | * section). */ | |
b020fb3d | 76 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
d9f89ef5 | 77 | /** The Diffserv value to use on IPv6 connections when the |
78 | * maximize throughput TOS value is used (see the TOS VALUES | |
79 | * section). */ | |
b020fb3d | 80 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
d9f89ef5 | 81 | /** The Diffserv value to use on IPv6 connections when the |
82 | * minimize delay TOS value is used (see the TOS VALUES | |
83 | * section). */ | |
b020fb3d | 84 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
f966ec56 | 85 | /** If enabled, the IP TOS interface will be used to set Diffserv |
56e7e7e7 | 86 | * codepoints on IPv4 sockets, by shifting the DSCP value two bits |
c8c6be24 FT |
87 | * to the left (remember, the DSCP field in the IPv4 header is |
88 | * defined as the 6 uppermost bits of the TOS field, the lower two | |
89 | * being left for ECN). This may only work on Linux. */ | |
f966ec56 | 90 | {CONF_VAR_BOOL, "dscp-tos", {.num = 0}}, |
d3372da9 | 91 | {CONF_VAR_END} |
92 | }; | |
93 | ||
02a705ad FT |
94 | #define UFD_SOCK 0 |
95 | #define UFD_PIPE 1 | |
96 | #define UFD_LISTEN 2 | |
97 | ||
98 | struct scons { | |
99 | struct scons *n, *p; | |
100 | struct socket *s; | |
101 | }; | |
102 | ||
103 | struct ufd { | |
104 | struct ufd *next, *prev; | |
105 | int fd; | |
106 | int type; | |
107 | int ignread; | |
108 | struct socket *sk; | |
109 | union { | |
110 | struct { | |
111 | int family; | |
112 | int type; | |
113 | struct sockaddr *remote; | |
114 | socklen_t remotelen; | |
115 | struct { | |
116 | uid_t uid; | |
117 | gid_t gid; | |
118 | } ucred; | |
119 | } s; | |
120 | struct { | |
121 | struct lport *lp; | |
122 | int family; | |
123 | } l; | |
124 | } d; | |
125 | }; | |
126 | ||
40c21c4f FT |
127 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf); |
128 | ||
02a705ad FT |
129 | static struct ufd *ufds = NULL; |
130 | static struct scons *rbatch, *wbatch, *cbatch; | |
d3372da9 | 131 | int numsocks = 0; |
132 | ||
133 | /* XXX: Get autoconf for all this... */ | |
134 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) | |
135 | { | |
136 | struct sockaddr_in *ipv4; | |
137 | struct configvar *var; | |
138 | void *bufend; | |
139 | int sock; | |
140 | struct ifconf conf; | |
141 | struct ifreq *ifr, req; | |
142 | char *pif; | |
143 | ||
144 | if(af == AF_INET) | |
145 | { | |
146 | var = confgetvar("net", "visibleipv4"); | |
147 | if(var->val.ipv4.s_addr != 0) | |
148 | { | |
149 | ipv4 = smalloc(sizeof(*ipv4)); | |
150 | ipv4->sin_family = AF_INET; | |
151 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; | |
152 | *addr = (struct sockaddr *)ipv4; | |
153 | *lenbuf = sizeof(*ipv4); | |
154 | return(0); | |
155 | } | |
bcb73bb3 | 156 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 | 157 | { |
158 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); | |
159 | return(-1); | |
160 | } | |
6fb0c6ac | 161 | if(!strcmp(pif, "")) |
162 | return(1); | |
d3372da9 | 163 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
164 | return(-1); | |
165 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); | |
166 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
167 | { | |
168 | free(conf.ifc_buf); | |
169 | close(sock); | |
170 | return(-1); | |
171 | } | |
172 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; | |
173 | ipv4 = NULL; | |
174 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) | |
175 | { | |
1315d02a | 176 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac | 177 | continue; |
d3372da9 | 178 | memset(&req, 0, sizeof(req)); |
179 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); | |
180 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) | |
6fb0c6ac | 181 | break; |
182 | if(!(req.ifr_flags & IFF_UP)) | |
d3372da9 | 183 | { |
6fb0c6ac | 184 | flog(LOG_WARNING, "public interface is down"); |
185 | break; | |
d3372da9 | 186 | } |
6fb0c6ac | 187 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 | 188 | { |
6fb0c6ac | 189 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
190 | break; | |
d3372da9 | 191 | } |
6fb0c6ac | 192 | ipv4 = smalloc(sizeof(*ipv4)); |
193 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); | |
194 | break; | |
d3372da9 | 195 | } |
bcb73bb3 | 196 | free(conf.ifc_buf); |
d3372da9 | 197 | close(sock); |
198 | if(ipv4 != NULL) | |
199 | { | |
200 | *addr = (struct sockaddr *)ipv4; | |
201 | *lenbuf = sizeof(*ipv4); | |
202 | return(0); | |
203 | } | |
204 | errno = ENETDOWN; | |
205 | return(-1); | |
206 | } | |
6fb0c6ac | 207 | return(1); |
d3372da9 | 208 | } |
209 | ||
02a705ad | 210 | static struct socket *newsock1(int dgram) |
d3372da9 | 211 | { |
212 | struct socket *new; | |
213 | ||
02a705ad FT |
214 | new = memset(smalloc(sizeof(*new)), 0, sizeof(*new)); |
215 | new->refcount = 1; | |
d3372da9 | 216 | new->state = -1; |
02a705ad | 217 | new->dgram = dgram; |
81286a22 | 218 | new->maxbuf = 65536; |
d3372da9 | 219 | numsocks++; |
220 | return(new); | |
221 | } | |
222 | ||
02a705ad FT |
223 | static struct socket *sockpair(int dgram) |
224 | { | |
225 | struct socket *s1, *s2; | |
226 | ||
227 | s1 = newsock1(dgram); | |
228 | s2 = newsock1(dgram); | |
229 | s1->back = s2; | |
230 | s2->back = s1; | |
231 | putsock(s2); | |
232 | return(s1); | |
233 | } | |
234 | ||
235 | static void sksetstate(struct socket *sk, int state) | |
236 | { | |
237 | sk->state = state; | |
238 | sk->back->state = state; | |
239 | } | |
240 | ||
1ce5968e FT |
241 | struct socket *netsockpipe(void) |
242 | { | |
243 | struct socket *sk; | |
244 | ||
245 | sk = sockpair(0); | |
246 | sksetstate(sk, SOCK_EST); | |
247 | return(sk); | |
248 | } | |
249 | ||
02a705ad FT |
250 | static void closeufd(struct ufd *ufd) |
251 | { | |
252 | if(ufd->fd != -1) | |
253 | close(ufd->fd); | |
254 | ufd->fd = -1; | |
255 | } | |
256 | ||
257 | static void freeufd(struct ufd *ufd) | |
258 | { | |
259 | if(ufd->next != NULL) | |
260 | ufd->next->prev = ufd->prev; | |
261 | if(ufd->prev != NULL) | |
262 | ufd->prev->next = ufd->next; | |
263 | if(ufd == ufds) | |
264 | ufds = ufd->next; | |
265 | closeufd(ufd); | |
5afb0d14 FT |
266 | if(ufd->sk != NULL) |
267 | putsock(ufd->sk); | |
02a705ad FT |
268 | if(ufd->type == UFD_SOCK) { |
269 | if(ufd->d.s.remote != NULL) | |
270 | free(ufd->d.s.remote); | |
271 | } | |
272 | free(ufd); | |
273 | } | |
274 | ||
275 | static struct ufd *mkufd(int fd, int type, struct socket *sk) | |
276 | { | |
277 | struct ufd *ufd; | |
278 | ||
279 | ufd = memset(smalloc(sizeof(*ufd)), 0, sizeof(*ufd)); | |
280 | ufd->fd = fd; | |
5afb0d14 | 281 | ufd->type = type; |
02a705ad FT |
282 | if(sk != NULL) { |
283 | getsock(ufd->sk = sk); | |
284 | sk->ufd = ufd; | |
285 | } | |
286 | if(type == UFD_SOCK) { | |
287 | ufd->d.s.ucred.uid = -1; | |
288 | ufd->d.s.ucred.gid = -1; | |
289 | } | |
290 | ufd->next = ufds; | |
291 | if(ufds) | |
292 | ufds->prev = ufd; | |
293 | ufds = ufd; | |
294 | return(ufd); | |
295 | } | |
296 | ||
297 | static struct ufd *dupufd(struct ufd *ufd) | |
298 | { | |
299 | struct ufd *nufd; | |
300 | struct socket *nsk; | |
301 | ||
302 | if(ufd->sk != NULL) | |
303 | nsk = sockpair(ufd->sk->dgram); | |
304 | else | |
305 | nsk = NULL; | |
306 | nufd = mkufd(ufd->fd, ufd->type, nsk); | |
307 | if(nsk != NULL) | |
308 | putsock(nsk); | |
309 | if((nufd->fd = dup(ufd->fd)) < 0) | |
310 | { | |
311 | flog(LOG_WARNING, "could not dup() fd: %s", strerror(errno)); | |
312 | freeufd(nufd); | |
313 | return(NULL); | |
314 | } | |
5afb0d14 | 315 | sksetstate(nsk, SOCK_EST); |
02a705ad FT |
316 | if(ufd->type == UFD_SOCK) { |
317 | nufd->d.s.family = ufd->d.s.family; | |
318 | nufd->d.s.type = ufd->d.s.type; | |
319 | nufd->d.s.ucred.uid = ufd->d.s.ucred.uid; | |
320 | nufd->d.s.ucred.gid = ufd->d.s.ucred.gid; | |
321 | if(ufd->d.s.remote != NULL) | |
322 | nufd->d.s.remote = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, nufd->d.s.remotelen = ufd->d.s.remotelen); | |
323 | } else if(ufd->type == UFD_LISTEN) { | |
324 | nufd->d.l.family = ufd->d.l.family; | |
325 | } | |
326 | return(nufd); | |
327 | } | |
328 | ||
d3372da9 | 329 | static struct socket *mksock(int domain, int type) |
330 | { | |
331 | int fd; | |
02a705ad FT |
332 | struct socket *sk; |
333 | struct ufd *ufd; | |
d3372da9 | 334 | |
335 | if((fd = socket(domain, type, 0)) < 0) | |
336 | { | |
337 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
338 | return(NULL); | |
339 | } | |
02a705ad FT |
340 | sk = sockpair(type == SOCK_DGRAM); |
341 | ufd = mkufd(fd, UFD_SOCK, sk); | |
342 | ufd->d.s.family = domain; | |
343 | ufd->d.s.type = type; | |
d3372da9 | 344 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 345 | return(sk); |
d3372da9 | 346 | } |
347 | ||
348 | struct socket *wrapsock(int fd) | |
349 | { | |
02a705ad FT |
350 | struct socket *sk; |
351 | struct ufd *ufd; | |
d3372da9 | 352 | |
02a705ad FT |
353 | sk = sockpair(0); |
354 | ufd = mkufd(fd, UFD_PIPE, sk->back); | |
355 | sksetstate(sk, SOCK_EST); | |
d3372da9 | 356 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 357 | return(sk); |
d3372da9 | 358 | } |
359 | ||
360 | void getsock(struct socket *sk) | |
361 | { | |
362 | sk->refcount++; | |
363 | } | |
364 | ||
b2e73d7b FT |
365 | static void sockdebug(int level, struct socket *sk, char *format, ...) |
366 | { | |
367 | va_list args; | |
fc8e5171 | 368 | char *tb; |
b2e73d7b | 369 | |
fc8e5171 | 370 | if((sk->dbgnm == NULL) || (level > sk->dbglvl)) |
b2e73d7b FT |
371 | return; |
372 | va_start(args, format); | |
fc8e5171 | 373 | tb = vsprintf2(format, args); |
b2e73d7b | 374 | va_end(args); |
fc8e5171 FT |
375 | fprintf(stderr, "%s: %s\n", sk->dbgnm, tb); |
376 | free(tb); | |
b2e73d7b FT |
377 | } |
378 | ||
379 | void socksetdebug(struct socket *sk, int level, char *nm, ...) | |
380 | { | |
381 | va_list args; | |
382 | char *tb; | |
383 | ||
384 | va_start(args, nm); | |
385 | tb = vsprintf2(nm, args); | |
386 | va_end(args); | |
387 | sk->dbgnm = sprintf2("%s (f)", tb); | |
388 | sk->back->dbgnm = sprintf2("%s (b)", tb); | |
389 | free(tb); | |
390 | sk->dbglvl = level; | |
391 | sk->back->dbglvl = level; | |
fc8e5171 | 392 | sockdebug(1, sk, "enabled debugging"); |
b2e73d7b FT |
393 | } |
394 | ||
02a705ad | 395 | static void freesock(struct socket *sk) |
d3372da9 | 396 | { |
397 | struct dgrambuf *buf; | |
398 | ||
b2e73d7b | 399 | sockdebug(1, sk, "freeing socket"); |
02a705ad FT |
400 | if(sk->dgram) { |
401 | while((buf = sk->buf.d.f) != NULL) { | |
402 | sk->buf.d.f = buf->next; | |
403 | freedgbuf(buf); | |
d3372da9 | 404 | } |
02a705ad FT |
405 | } else { |
406 | if(sk->buf.s.buf != NULL) | |
407 | free(sk->buf.s.buf); | |
408 | } | |
b2e73d7b FT |
409 | if(sk->dbgnm != NULL) |
410 | free(sk->dbgnm); | |
02a705ad FT |
411 | free(sk); |
412 | numsocks--; | |
413 | } | |
414 | ||
415 | void putsock(struct socket *sk) | |
416 | { | |
7dddb551 FT |
417 | struct socket *back; |
418 | ||
02a705ad FT |
419 | if(--(sk->refcount) < 0) { |
420 | flog(LOG_CRIT, "BUG: socket refcount < 0"); | |
421 | abort(); | |
422 | } | |
423 | if((sk->refcount == 0) && (sk->back->refcount == 0)) { | |
7dddb551 | 424 | back = sk->back; |
02a705ad | 425 | freesock(sk); |
7dddb551 | 426 | freesock(back); |
02a705ad FT |
427 | } |
428 | } | |
429 | ||
1ff9e8ea FT |
430 | void quitsock(struct socket *sk) |
431 | { | |
432 | sk->readcb = NULL; | |
433 | sk->writecb = NULL; | |
434 | sk->errcb = NULL; | |
435 | putsock(sk); | |
436 | } | |
437 | ||
02a705ad FT |
438 | static void linksock(struct scons **list, struct socket *sk) |
439 | { | |
440 | struct scons *sc; | |
441 | ||
442 | for(sc = *list; sc != NULL; sc = sc->n) { | |
443 | if(sc->s == sk) | |
444 | return; | |
d3372da9 | 445 | } |
02a705ad FT |
446 | sc = smalloc(sizeof(*sc)); |
447 | getsock(sc->s = sk); | |
448 | sc->n = *list; | |
449 | sc->p = NULL; | |
450 | if(*list) | |
451 | (*list)->p = sc; | |
452 | *list = sc; | |
d3372da9 | 453 | } |
454 | ||
336539c2 | 455 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
456 | { | |
02a705ad FT |
457 | if(size == 0) |
458 | return; | |
459 | if(sk->dgram) { | |
336539c2 | 460 | /* XXX */ |
02a705ad FT |
461 | } else { |
462 | sizebuf(&sk->buf.s.buf, &sk->buf.s.bufsize, sk->buf.s.datasize + size, 1, 1); | |
463 | memmove(sk->buf.s.buf + size, sk->buf.s.buf, sk->buf.s.datasize); | |
464 | memcpy(sk->buf.s.buf, buf, size); | |
465 | sk->buf.s.datasize += size; | |
466 | linksock(&rbatch, sk); | |
336539c2 | 467 | } |
02a705ad FT |
468 | } |
469 | ||
470 | /* Read as the preterite of `read' */ | |
471 | void sockread(struct socket *sk) | |
472 | { | |
5afb0d14 FT |
473 | if((sockgetdatalen(sk) == 0) && (sk->eos == 1)) |
474 | linksock(&rbatch, sk); | |
02a705ad FT |
475 | linksock(&wbatch, sk->back); |
476 | } | |
477 | ||
478 | void freedgbuf(struct dgrambuf *dg) | |
479 | { | |
480 | if(dg->data != NULL) | |
481 | free(dg->data); | |
482 | if(dg->addr != NULL) | |
483 | free(dg->addr); | |
484 | free(dg); | |
485 | } | |
486 | ||
487 | struct dgrambuf *sockgetdgbuf(struct socket *sk) | |
488 | { | |
489 | struct dgrambuf *dbuf; | |
490 | ||
491 | if((dbuf = sk->buf.d.f) == NULL) | |
492 | return(NULL); | |
493 | sk->buf.d.f = dbuf->next; | |
494 | if(dbuf->next == NULL) | |
495 | sk->buf.d.l = NULL; | |
496 | dbuf->next = NULL; | |
497 | sockread(sk); | |
498 | return(dbuf); | |
336539c2 | 499 | } |
500 | ||
d3372da9 | 501 | void *sockgetinbuf(struct socket *sk, size_t *size) |
502 | { | |
503 | void *buf; | |
504 | struct dgrambuf *dbuf; | |
505 | ||
02a705ad FT |
506 | if(sk->dgram) { |
507 | dbuf = sockgetdgbuf(sk); | |
d3372da9 | 508 | buf = dbuf->data; |
509 | *size = dbuf->size; | |
510 | free(dbuf->addr); | |
511 | free(dbuf); | |
02a705ad FT |
512 | } else { |
513 | if((sk->buf.s.buf == NULL) || (sk->buf.s.datasize == 0)) | |
514 | { | |
515 | *size = 0; | |
b2e73d7b | 516 | sockdebug(2, sk, "read 0 bytes", *size); |
02a705ad FT |
517 | return(NULL); |
518 | } | |
519 | buf = sk->buf.s.buf; | |
520 | *size = sk->buf.s.datasize; | |
521 | sk->buf.s.buf = NULL; | |
522 | sk->buf.s.bufsize = sk->buf.s.datasize = 0; | |
523 | sockread(sk); | |
d3372da9 | 524 | } |
fc8e5171 | 525 | sockdebug(2, sk, "read %zi bytes", *size); |
02a705ad FT |
526 | return(buf); |
527 | } | |
528 | ||
529 | void sockqueue(struct socket *sk, void *data, size_t size) | |
530 | { | |
531 | struct dgrambuf *new; | |
532 | struct sockaddr *remote; | |
533 | socklen_t remotelen; | |
534 | ||
fc8e5171 | 535 | sockdebug(2, sk, "queued %zi bytes", size); |
02a705ad FT |
536 | if(size == 0) |
537 | return; | |
538 | if(sk->state == SOCK_STL) | |
539 | return; | |
540 | if(sk->dgram) { | |
541 | if(sockpeeraddr(sk, &remote, &remotelen)) | |
542 | return; | |
543 | new = smalloc(sizeof(*new)); | |
544 | new->next = NULL; | |
545 | memcpy(new->data = smalloc(size), data, new->size = size); | |
546 | new->addr = remote; | |
547 | new->addrlen = remotelen; | |
548 | if(sk->back->buf.d.l == NULL) | |
549 | { | |
550 | sk->back->buf.d.l = sk->back->buf.d.f = new; | |
551 | } else { | |
552 | sk->back->buf.d.l->next = new; | |
553 | sk->back->buf.d.l = new; | |
554 | } | |
555 | } else { | |
556 | sizebuf(&(sk->back->buf.s.buf), &(sk->back->buf.s.bufsize), sk->back->buf.s.datasize + size, 1, 1); | |
557 | memcpy(sk->back->buf.s.buf + sk->back->buf.s.datasize, data, size); | |
558 | sk->back->buf.s.datasize += size; | |
559 | } | |
560 | linksock(&rbatch, sk->back); | |
561 | } | |
562 | ||
563 | void sockqueuedg(struct socket *sk, struct dgrambuf *dg) | |
564 | { | |
565 | if(sk->state == SOCK_STL) { | |
566 | freedgbuf(dg); | |
567 | return; | |
568 | } | |
569 | if(!sk->dgram) { | |
570 | flog(LOG_ERR, "BUG: sockqueuedg called on non-dgram socket"); | |
571 | freedgbuf(dg); | |
572 | return; | |
573 | } | |
574 | dg->next = NULL; | |
575 | if(sk->back->buf.d.l == NULL) | |
576 | { | |
577 | sk->back->buf.d.l = sk->back->buf.d.f = dg; | |
578 | } else { | |
579 | sk->back->buf.d.l->next = dg; | |
580 | sk->back->buf.d.l = dg; | |
581 | } | |
582 | linksock(&rbatch, sk->back); | |
583 | } | |
584 | ||
40c21c4f | 585 | void sockerror(struct socket *sk, int en) |
02a705ad FT |
586 | { |
587 | sksetstate(sk, SOCK_STL); | |
588 | if(sk->back->errcb != NULL) | |
589 | sk->back->errcb(sk->back, en, sk->back->data); | |
d3372da9 | 590 | } |
591 | ||
02a705ad | 592 | static void recvcmsg(struct ufd *ufd, struct msghdr *msg) |
9e5f2b29 | 593 | { |
594 | struct cmsghdr *cmsg; | |
9e5f2b29 | 595 | |
596 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
597 | { | |
a8c5ada6 | 598 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 599 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
600 | { | |
a8c5ada6 | 601 | struct ucred *cred; |
02a705ad | 602 | if(ufd->d.s.ucred.uid == -1) |
9e5f2b29 | 603 | { |
604 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
02a705ad FT |
605 | ufd->d.s.ucred.uid = cred->uid; |
606 | ufd->d.s.ucred.gid = cred->gid; | |
9e5f2b29 | 607 | } |
608 | } | |
a8c5ada6 | 609 | #endif |
9e5f2b29 | 610 | } |
611 | } | |
612 | ||
02a705ad FT |
613 | static int ufddgram(struct ufd *ufd) |
614 | { | |
615 | int dgram; | |
616 | ||
617 | if(ufd->type == UFD_SOCK) { | |
618 | dgram = ufd->d.s.type == SOCK_DGRAM; | |
619 | } else if(ufd->type == UFD_PIPE) { | |
620 | dgram = 0; | |
621 | } else { | |
622 | flog(LOG_ERR, "BUG: calling ufddgram on ufd of bad type %i", ufd->type); | |
623 | return(-1); | |
624 | } | |
625 | if(ufd->sk == NULL) { | |
626 | flog(LOG_ERR, "BUG: calling ufddgram on socketless ufd (type %i)", ufd->type); | |
627 | return(-1); | |
628 | } | |
629 | if(dgram != ufd->sk->dgram) { | |
630 | flog(LOG_ERR, "BUG: ufd/socket dgram value mismatch"); | |
631 | return(-1); | |
632 | } | |
633 | return(dgram); | |
634 | } | |
635 | ||
636 | static void sockrecv(struct ufd *ufd) | |
d3372da9 | 637 | { |
638 | int ret, inq; | |
02a705ad | 639 | int dgram; |
d3372da9 | 640 | struct dgrambuf *dbuf; |
9e5f2b29 | 641 | struct msghdr msg; |
642 | char cbuf[65536]; | |
643 | struct iovec bufvec; | |
02a705ad | 644 | void *buf; |
d3372da9 | 645 | |
9e5f2b29 | 646 | memset(&msg, 0, sizeof(msg)); |
647 | msg.msg_iov = &bufvec; | |
648 | msg.msg_iovlen = 1; | |
649 | msg.msg_control = cbuf; | |
650 | msg.msg_controllen = sizeof(cbuf); | |
02a705ad FT |
651 | if((dgram = ufddgram(ufd)) < 0) |
652 | return; | |
653 | if(dgram) { | |
9e5f2b29 | 654 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
02a705ad | 655 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
d3372da9 | 656 | { |
657 | /* I don't really know what could go wrong here, so let's | |
658 | * assume it's transient. */ | |
02a705ad | 659 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), ufd->fd); |
d3372da9 | 660 | return; |
661 | } | |
9e5f2b29 | 662 | #else |
663 | inq = 65536; | |
664 | #endif | |
d3372da9 | 665 | dbuf = smalloc(sizeof(*dbuf)); |
666 | dbuf->data = smalloc(inq); | |
667 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 668 | msg.msg_name = dbuf->addr; |
669 | msg.msg_namelen = dbuf->addrlen; | |
670 | bufvec.iov_base = dbuf->data; | |
671 | bufvec.iov_len = inq; | |
02a705ad | 672 | ret = recvmsg(ufd->fd, &msg, 0); |
9e5f2b29 | 673 | dbuf->addrlen = msg.msg_namelen; |
d3372da9 | 674 | if(ret < 0) |
675 | { | |
02a705ad | 676 | freedgbuf(dbuf); |
d3372da9 | 677 | if((errno == EINTR) || (errno == EAGAIN)) |
678 | return; | |
02a705ad FT |
679 | closeufd(ufd); |
680 | sockerror(ufd->sk, errno); | |
d3372da9 | 681 | return; |
682 | } | |
9e5f2b29 | 683 | if(msg.msg_flags & MSG_CTRUNC) |
684 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
685 | else | |
02a705ad | 686 | recvcmsg(ufd, &msg); |
d3372da9 | 687 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
688 | * have EOF), but rather an empty packet. I don't know if any | |
689 | * other potential DGRAM protocols might have an EOF | |
690 | * condition, so let's play safe. */ | |
691 | if(ret == 0) | |
692 | { | |
02a705ad FT |
693 | freedgbuf(dbuf); |
694 | if((ufd->type != UFD_SOCK) || !((ufd->d.s.family == AF_INET) || (ufd->d.s.family == AF_INET6))) | |
d3372da9 | 695 | { |
40c21c4f | 696 | closesock(ufd->sk); |
02a705ad | 697 | closeufd(ufd); |
d3372da9 | 698 | } |
699 | return; | |
700 | } | |
701 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
702 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
703 | dbuf->next = NULL; | |
02a705ad FT |
704 | sockqueuedg(ufd->sk, dbuf); |
705 | } else { | |
706 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
707 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
708 | * how to read the inqueue size on other OSs */ | |
709 | if(ufd->type == UFD_SOCK) { | |
710 | if(ioctl(ufd->fd, SIOCINQ, &inq)) | |
711 | { | |
712 | /* I don't really know what could go wrong here, so let's | |
713 | * assume it's transient. */ | |
714 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), ufd->fd); | |
715 | inq = 2048; | |
716 | } | |
717 | } else { | |
718 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
719 | inq = 65536; | |
720 | } | |
721 | #else | |
722 | inq = 2048; | |
723 | #endif | |
724 | if(inq > 65536) | |
725 | inq = 65536; | |
726 | /* This part could be optimized by telling the kernel to read | |
727 | * directly into ufd->sk->back->buf, but that would be uglier | |
728 | * by not using the socket function interface. */ | |
729 | buf = smalloc(inq); | |
730 | if(ufd->type == UFD_SOCK) | |
731 | { | |
732 | bufvec.iov_base = buf; | |
733 | bufvec.iov_len = inq; | |
734 | ret = recvmsg(ufd->fd, &msg, 0); | |
735 | } else { | |
736 | ret = read(ufd->fd, buf, inq); | |
737 | msg.msg_controllen = 0; | |
738 | msg.msg_flags = 0; | |
739 | } | |
740 | if(ret < 0) | |
741 | { | |
742 | free(buf); | |
743 | if((errno == EINTR) || (errno == EAGAIN)) | |
744 | return; | |
745 | closeufd(ufd); | |
746 | sockerror(ufd->sk, errno); | |
747 | return; | |
748 | } | |
749 | if(msg.msg_flags & MSG_CTRUNC) | |
750 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
d3372da9 | 751 | else |
02a705ad FT |
752 | recvcmsg(ufd, &msg); |
753 | if(ret == 0) | |
754 | { | |
755 | free(buf); | |
756 | closeufd(ufd); | |
40c21c4f | 757 | closesock(ufd->sk); |
02a705ad FT |
758 | return; |
759 | } | |
760 | sockqueue(ufd->sk, buf, ret); | |
761 | free(buf); | |
d3372da9 | 762 | } |
763 | } | |
764 | ||
89d650f1 | 765 | static int sockflush(struct ufd *ufd) |
d3372da9 | 766 | { |
767 | int ret; | |
768 | struct dgrambuf *dbuf; | |
02a705ad | 769 | int dgram; |
d3372da9 | 770 | |
89d650f1 FT |
771 | if((dgram = ufddgram(ufd)) < 0) { |
772 | errno = EBADFD; | |
773 | return(-1); | |
774 | } | |
02a705ad FT |
775 | if(dgram) { |
776 | dbuf = sockgetdgbuf(ufd->sk); | |
777 | sendto(ufd->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
778 | freedgbuf(dbuf); | |
779 | } else { | |
780 | if(ufd->type == UFD_SOCK) | |
781 | ret = send(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
d3372da9 | 782 | else |
02a705ad | 783 | ret = write(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize); |
89d650f1 FT |
784 | if(ret < 0) |
785 | return(-1); | |
02a705ad FT |
786 | if(ret > 0) { |
787 | memmove(ufd->sk->buf.s.buf, ((char *)ufd->sk->buf.s.buf) + ret, ufd->sk->buf.s.datasize -= ret); | |
788 | sockread(ufd->sk); | |
d3372da9 | 789 | } |
d3372da9 | 790 | } |
89d650f1 | 791 | return(0); |
d3372da9 | 792 | } |
793 | ||
794 | void closesock(struct socket *sk) | |
795 | { | |
b2e73d7b | 796 | sockdebug(1, sk, "closed"); |
02a705ad | 797 | sksetstate(sk, SOCK_STL); |
40c21c4f FT |
798 | if(sk->back->eos == 0) |
799 | sk->back->eos = 1; | |
800 | linksock(&rbatch, sk->back); | |
d3372da9 | 801 | } |
802 | ||
803 | size_t sockgetdatalen(struct socket *sk) | |
804 | { | |
805 | struct dgrambuf *b; | |
806 | size_t ret; | |
807 | ||
02a705ad | 808 | if(sk->dgram) { |
d3372da9 | 809 | ret = 0; |
02a705ad | 810 | for(b = sk->buf.d.f; b != NULL; b = b->next) |
d3372da9 | 811 | ret += b->size; |
02a705ad FT |
812 | } else { |
813 | ret = sk->buf.s.datasize; | |
d3372da9 | 814 | } |
815 | return(ret); | |
816 | } | |
817 | ||
81286a22 FT |
818 | /* size_t sockqueuesize(struct socket *sk) */ |
819 | /* { */ | |
820 | /* return(sockgetdatalen(sk->back)); */ | |
821 | /* } */ | |
822 | ||
1ff9e8ea FT |
823 | size_t socktqueuesize(struct socket *sk) |
824 | { | |
825 | size_t ret; | |
826 | ||
827 | ret = 0; | |
828 | while(1) { | |
829 | ret += sockgetdatalen(sk->back); | |
830 | if((sk = sk->back->pnext) == NULL) | |
831 | return(ret); | |
832 | } | |
833 | } | |
834 | ||
81286a22 | 835 | ssize_t sockqueueleft(struct socket *sk) |
d3372da9 | 836 | { |
81286a22 | 837 | return(sk->back->maxbuf - sockgetdatalen(sk->back)); |
d3372da9 | 838 | } |
839 | ||
d3372da9 | 840 | /* |
7ab36fbd | 841 | * Seriously, I don't know if it's naughty or not to remove |
842 | * pre-existing Unix sockets. | |
843 | */ | |
02a705ad | 844 | static int rebindunix(struct ufd *ufd, struct sockaddr *name, socklen_t namelen) |
7ab36fbd | 845 | { |
846 | struct sockaddr_un *un; | |
847 | struct stat sb; | |
848 | ||
02a705ad | 849 | if((ufd->d.l.family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
7ab36fbd | 850 | return(-1); |
851 | un = (struct sockaddr_un *)name; | |
852 | if(stat(un->sun_path, &sb)) | |
853 | return(-1); | |
854 | if(!S_ISSOCK(sb.st_mode)) | |
855 | return(-1); | |
856 | if(unlink(un->sun_path)) | |
857 | return(-1); | |
02a705ad | 858 | if(bind(ufd->fd, name, namelen) < 0) |
7ab36fbd | 859 | return(-1); |
860 | return(0); | |
861 | } | |
862 | ||
f96d0914 FT |
863 | void closelport(struct lport *lp) |
864 | { | |
40c21c4f FT |
865 | struct ufd *ufd; |
866 | struct sockaddr_un *un; | |
867 | ||
868 | ufd = lp->ufd; | |
869 | if((ufd->d.l.family == AF_UNIX) && !getlocalname(ufd->fd, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX) && strchr(un->sun_path, '/')) { | |
870 | if(unlink(un->sun_path)) | |
871 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); | |
872 | } | |
f96d0914 FT |
873 | freeufd(lp->ufd); |
874 | } | |
875 | ||
7ab36fbd | 876 | /* |
d3372da9 | 877 | * The difference between netcslisten() and netcslistenlocal() is that |
878 | * netcslistenlocal() always listens on the local host, instead of | |
879 | * following proxy/passive mode directions. It is suitable for eg. the | |
880 | * UI channel, while the file sharing networks should, naturally, use | |
881 | * netcslisten() instead. | |
882 | */ | |
883 | ||
02a705ad | 884 | struct lport *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
d3372da9 | 885 | { |
02a705ad FT |
886 | struct lport *lp; |
887 | struct ufd *ufd; | |
888 | int fd; | |
66c517d2 | 889 | int intbuf; |
d3372da9 | 890 | |
891 | /* I don't know if this is actually correct (it probably isn't), | |
892 | * but since, at on least Linux systems, PF_* are specifically | |
893 | * #define'd to their AF_* counterparts, it allows for a severely | |
894 | * smoother implementation. If it breaks something on your | |
895 | * platform, please tell me so. | |
896 | */ | |
02a705ad | 897 | if((fd = socket(name->sa_family, type, 0)) < 0) |
d3372da9 | 898 | return(NULL); |
02a705ad | 899 | if(confgetint("net", "reuseaddr")) { |
687b2ee2 | 900 | intbuf = 1; |
02a705ad | 901 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
687b2ee2 | 902 | } |
02a705ad | 903 | ufd = mkufd(fd, UFD_LISTEN, NULL); |
02a705ad | 904 | ufd->d.l.family = name->sa_family; |
f96d0914 FT |
905 | lp = memset(smalloc(sizeof(*lp)), 0, sizeof(*lp)); |
906 | lp->ufd = ufd; | |
907 | ufd->d.l.lp = lp; | |
02a705ad FT |
908 | if((bind(fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(ufd, name, namelen) < 0))) { |
909 | freeufd(ufd); | |
d3372da9 | 910 | return(NULL); |
911 | } | |
02a705ad | 912 | if(listen(fd, 16) < 0) |
d3372da9 | 913 | { |
02a705ad | 914 | freeufd(ufd); |
d3372da9 | 915 | return(NULL); |
916 | } | |
02a705ad FT |
917 | lp->acceptcb = func; |
918 | lp->data = data; | |
919 | return(lp); | |
d3372da9 | 920 | } |
921 | ||
02a705ad | 922 | struct lport *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
c23acc61 | 923 | { |
924 | if(confgetint("net", "mode") == 1) | |
925 | { | |
926 | errno = EOPNOTSUPP; | |
927 | return(NULL); | |
928 | } | |
c23acc61 | 929 | if(confgetint("net", "mode") == 0) |
930 | return(netcslistenlocal(type, name, namelen, func, data)); | |
931 | errno = EOPNOTSUPP; | |
932 | return(NULL); | |
933 | } | |
934 | ||
02a705ad | 935 | struct lport *netcstcplisten(int port, int local, void (*func)(struct lport *, struct socket *, void *), void *data) |
0a1bc5b1 | 936 | { |
937 | struct sockaddr_in addr; | |
938 | #ifdef HAVE_IPV6 | |
939 | struct sockaddr_in6 addr6; | |
940 | #endif | |
02a705ad FT |
941 | struct lport *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct lport *, struct socket *, void *), void *); |
942 | struct lport *ret; | |
0a1bc5b1 | 943 | |
944 | if(local) | |
945 | csfunc = netcslistenlocal; | |
946 | else | |
947 | csfunc = netcslisten; | |
948 | #ifdef HAVE_IPV6 | |
949 | memset(&addr6, 0, sizeof(addr6)); | |
950 | addr6.sin6_family = AF_INET6; | |
951 | addr6.sin6_port = htons(port); | |
952 | addr6.sin6_addr = in6addr_any; | |
953 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
954 | return(ret); | |
955 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
956 | return(NULL); | |
957 | #endif | |
958 | memset(&addr, 0, sizeof(addr)); | |
959 | addr.sin_family = AF_INET; | |
960 | addr.sin_port = htons(port); | |
961 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
962 | } | |
963 | ||
d3372da9 | 964 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
965 | { | |
966 | struct socket *sk; | |
967 | int mode; | |
968 | ||
969 | mode = confgetint("net", "mode"); | |
970 | if((mode == 0) || (mode == 1)) | |
971 | { | |
972 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
973 | return(NULL); | |
02a705ad | 974 | if(bind(sk->ufd->fd, name, namelen) < 0) |
d3372da9 | 975 | { |
976 | putsock(sk); | |
977 | return(NULL); | |
978 | } | |
02a705ad FT |
979 | sksetstate(sk, SOCK_EST); |
980 | return(sk->back); | |
d3372da9 | 981 | } |
982 | errno = EOPNOTSUPP; | |
983 | return(NULL); | |
984 | } | |
985 | ||
02a705ad | 986 | struct socket *netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
d3372da9 | 987 | { |
02a705ad | 988 | struct ufd *nufd; |
d3372da9 | 989 | |
02a705ad | 990 | nufd = dupufd(sk->back->ufd); |
5afb0d14 | 991 | getsock(sk = nufd->sk->back); |
02a705ad FT |
992 | memcpy(nufd->d.s.remote = smalloc(addrlen), addr, nufd->d.s.remotelen = addrlen); |
993 | nufd->ignread = 1; | |
994 | return(sk); | |
d3372da9 | 995 | } |
996 | ||
cab0b442 | 997 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 998 | { |
999 | struct socket *sk; | |
1000 | int mode; | |
1001 | ||
1002 | mode = confgetint("net", "mode"); | |
1003 | if((mode == 0) || (mode == 1)) | |
1004 | { | |
1005 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
1006 | return(NULL); | |
02a705ad FT |
1007 | memcpy(sk->ufd->d.s.remote = smalloc(addrlen), addr, sk->ufd->d.s.remotelen = addrlen); |
1008 | sk->back->conncb = func; | |
1009 | sk->back->data = data; | |
8d7a1e88 FT |
1010 | getsock(sk->back); |
1011 | putsock(sk); | |
02a705ad | 1012 | if(!connect(sk->ufd->fd, addr, addrlen)) |
d3372da9 | 1013 | { |
02a705ad FT |
1014 | sksetstate(sk, SOCK_EST); |
1015 | linksock(&cbatch, sk->back); | |
1016 | return(sk->back); | |
d3372da9 | 1017 | } |
1018 | if(errno == EINPROGRESS) | |
1019 | { | |
02a705ad FT |
1020 | sksetstate(sk, SOCK_SYN); |
1021 | return(sk->back); | |
d3372da9 | 1022 | } |
bceefd0d | 1023 | putsock(sk->back); |
d3372da9 | 1024 | return(NULL); |
1025 | } | |
1026 | errno = EOPNOTSUPP; | |
1027 | return(NULL); | |
1028 | } | |
1029 | ||
02a705ad | 1030 | static void acceptunix(struct ufd *ufd) |
9e5f2b29 | 1031 | { |
1032 | int buf; | |
1033 | ||
1034 | buf = 1; | |
a8c5ada6 | 1035 | #if UNIX_AUTH_STYLE == 1 |
02a705ad FT |
1036 | if(setsockopt(ufd->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
1037 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", ufd->fd, strerror(errno)); | |
a8c5ada6 | 1038 | #elif UNIX_AUTH_STYLE == 2 |
02a705ad | 1039 | if(getpeereid(ufd->fd, &ufd->d.s.ucred.uid, &ufd->d.s.ucred.gid) < 0) |
a8c5ada6 | 1040 | { |
02a705ad FT |
1041 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", ufd->fd, strerror(errno)); |
1042 | ufd->d.s.ucred.uid = -1; | |
1043 | ufd->d.s.ucred.gid = -1; | |
a8c5ada6 | 1044 | } |
1045 | #endif | |
9e5f2b29 | 1046 | } |
1047 | ||
f96d0914 FT |
1048 | static void runbatches(void) |
1049 | { | |
1050 | struct scons *sc, *nsc; | |
1051 | ||
1052 | for(sc = cbatch, cbatch = NULL; sc; sc = nsc) { | |
1053 | nsc = sc->n; | |
5afb0d14 FT |
1054 | if(sc->s->conncb != NULL) |
1055 | sc->s->conncb(sc->s, 0, sc->s->data); | |
834b0aa6 | 1056 | putsock(sc->s); |
f96d0914 FT |
1057 | free(sc); |
1058 | } | |
1059 | for(sc = rbatch, rbatch = NULL; sc; sc = nsc) { | |
1060 | nsc = sc->n; | |
5afb0d14 FT |
1061 | if(sc->s->readcb != NULL) |
1062 | sc->s->readcb(sc->s, sc->s->data); | |
1063 | if((sockgetdatalen(sc->s) == 0) && (sc->s->eos == 1)) { | |
1064 | if(sc->s->errcb != NULL) | |
1065 | sc->s->errcb(sc->s, 0, sc->s->data); | |
1066 | sc->s->eos = 2; | |
1067 | } | |
834b0aa6 | 1068 | putsock(sc->s); |
f96d0914 FT |
1069 | free(sc); |
1070 | } | |
1071 | for(sc = wbatch, wbatch = NULL; sc; sc = nsc) { | |
1072 | nsc = sc->n; | |
5afb0d14 FT |
1073 | if(sc->s->writecb != NULL) |
1074 | sc->s->writecb(sc->s, sc->s->data); | |
834b0aa6 | 1075 | putsock(sc->s); |
f96d0914 FT |
1076 | free(sc); |
1077 | } | |
1078 | } | |
1079 | ||
5afb0d14 FT |
1080 | static void cleansocks(void) |
1081 | { | |
1082 | struct ufd *ufd, *next; | |
8d7a1e88 | 1083 | int dead; |
5afb0d14 FT |
1084 | |
1085 | for(ufd = ufds; ufd != NULL; ufd = next) { | |
1086 | next = ufd->next; | |
8d7a1e88 FT |
1087 | if(ufd->sk) { |
1088 | dead = (ufd->fd < 0); | |
1089 | if(ufd->sk->state == SOCK_STL) | |
1090 | dead = 1; | |
1091 | if((ufd->sk->state == SOCK_EST) && (sockgetdatalen(ufd->sk) == 0)) | |
1092 | dead = 1; | |
1093 | if(!dead) | |
1094 | continue; | |
5afb0d14 FT |
1095 | if(ufd->sk->eos == 1) { |
1096 | ufd->sk->eos = 2; | |
1097 | closeufd(ufd); | |
1098 | closesock(ufd->sk); | |
1099 | } | |
1100 | if((ufd->sk->refcount == 1) && (ufd->sk->back->refcount == 0)) { | |
1101 | freeufd(ufd); | |
1102 | continue; | |
1103 | } | |
1104 | } | |
1105 | } | |
1106 | } | |
1107 | ||
d3372da9 | 1108 | int pollsocks(int timeout) |
1109 | { | |
02a705ad | 1110 | int ret; |
eaa35963 | 1111 | socklen_t retlen; |
72a7835e FT |
1112 | int newfd, maxfd; |
1113 | fd_set rfds, wfds, efds; | |
5afb0d14 | 1114 | struct ufd *ufd, *nufd; |
02a705ad | 1115 | struct socket *nsk; |
d3372da9 | 1116 | struct sockaddr_storage ss; |
1117 | socklen_t sslen; | |
72a7835e | 1118 | struct timeval tv; |
d3372da9 | 1119 | |
5afb0d14 | 1120 | cleansocks(); |
72a7835e FT |
1121 | FD_ZERO(&rfds); |
1122 | FD_ZERO(&wfds); | |
1123 | FD_ZERO(&efds); | |
02a705ad FT |
1124 | for(maxfd = 0, ufd = ufds; ufd != NULL; ufd = ufd->next) { |
1125 | if(ufd->fd < 0) | |
d3372da9 | 1126 | continue; |
81286a22 | 1127 | if(!ufd->ignread && ((ufd->sk == NULL) || (sockqueueleft(ufd->sk) > 0))) |
02a705ad FT |
1128 | FD_SET(ufd->fd, &rfds); |
1129 | if(ufd->sk != NULL) { | |
1130 | if(sockgetdatalen(ufd->sk) > 0) | |
1131 | FD_SET(ufd->fd, &wfds); | |
1132 | else if(ufd->sk->state == SOCK_SYN) | |
1133 | FD_SET(ufd->fd, &wfds); | |
1134 | } | |
1135 | FD_SET(ufd->fd, &efds); | |
1136 | if(ufd->fd > maxfd) | |
1137 | maxfd = ufd->fd; | |
d3372da9 | 1138 | } |
5afb0d14 FT |
1139 | if(rbatch || wbatch || cbatch) |
1140 | timeout = 0; | |
72a7835e FT |
1141 | tv.tv_sec = timeout / 1000; |
1142 | tv.tv_usec = (timeout % 1000) * 1000; | |
1143 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
02a705ad FT |
1144 | if(ret < 0) { |
1145 | if(errno != EINTR) { | |
72a7835e | 1146 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 1147 | /* To avoid CPU hogging in case it's bad, which it |
1148 | * probably is. */ | |
1149 | sleep(1); | |
1150 | } | |
d3372da9 | 1151 | return(1); |
1152 | } | |
5afb0d14 | 1153 | for(ufd = ufds; ufd != NULL; ufd = ufd->next) { |
02a705ad FT |
1154 | if(ufd->sk < 0) |
1155 | continue; | |
1156 | if(ufd->type == UFD_LISTEN) { | |
1157 | if(FD_ISSET(ufd->fd, &rfds)) { | |
d3372da9 | 1158 | sslen = sizeof(ss); |
02a705ad FT |
1159 | if((newfd = accept(ufd->fd, (struct sockaddr *)&ss, &sslen)) < 0) { |
1160 | if(ufd->d.l.lp->errcb != NULL) | |
1161 | ufd->d.l.lp->errcb(ufd->d.l.lp, errno, ufd->d.l.lp->data); | |
cab0b442 | 1162 | } |
02a705ad FT |
1163 | nsk = sockpair(0); |
1164 | nufd = mkufd(newfd, UFD_SOCK, nsk); | |
1165 | nufd->d.s.family = ufd->d.l.family; | |
1166 | sksetstate(nsk, SOCK_EST); | |
1167 | memcpy(nufd->d.s.remote = smalloc(sslen), &ss, sslen); | |
1168 | nufd->d.s.remotelen = sslen; | |
9e5f2b29 | 1169 | if(ss.ss_family == PF_UNIX) |
02a705ad FT |
1170 | acceptunix(nufd); |
1171 | if(ufd->d.l.lp->acceptcb != NULL) | |
5afb0d14 | 1172 | ufd->d.l.lp->acceptcb(ufd->d.l.lp, nsk->back, ufd->d.l.lp->data); |
02a705ad | 1173 | putsock(nsk); |
d3372da9 | 1174 | } |
02a705ad | 1175 | if(FD_ISSET(ufd->fd, &efds)) { |
d3372da9 | 1176 | retlen = sizeof(ret); |
02a705ad FT |
1177 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
1178 | if(ufd->d.l.lp->errcb != NULL) | |
1179 | ufd->d.l.lp->errcb(ufd->d.l.lp, ret, ufd->d.l.lp->data); | |
d3372da9 | 1180 | continue; |
1181 | } | |
02a705ad FT |
1182 | } else { |
1183 | if(ufd->sk->state == SOCK_SYN) { | |
1184 | if(FD_ISSET(ufd->fd, &efds)) { | |
1185 | retlen = sizeof(ret); | |
1186 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1187 | if(ufd->sk->back->conncb != NULL) | |
1188 | ufd->sk->back->conncb(ufd->sk->back, ret, ufd->sk->back->data); | |
1189 | closeufd(ufd); | |
1190 | continue; | |
1191 | } | |
1192 | if(FD_ISSET(ufd->fd, &rfds) || FD_ISSET(ufd->fd, &wfds)) { | |
1193 | sksetstate(ufd->sk, SOCK_EST); | |
1194 | linksock(&cbatch, ufd->sk->back); | |
1195 | } | |
1196 | } else if(ufd->sk->state == SOCK_EST) { | |
1197 | if(FD_ISSET(ufd->fd, &efds)) { | |
1198 | retlen = sizeof(ret); | |
1199 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1200 | sockerror(ufd->sk, ret); | |
1201 | closeufd(ufd); | |
1202 | continue; | |
1203 | } | |
1204 | if(FD_ISSET(ufd->fd, &rfds)) | |
1205 | sockrecv(ufd); | |
5afb0d14 FT |
1206 | if(ufd->fd == -1) |
1207 | continue; | |
89d650f1 FT |
1208 | if(FD_ISSET(ufd->fd, &wfds)) { |
1209 | if(sockflush(ufd)) { | |
1210 | sockerror(ufd->sk, errno); | |
1211 | closeufd(ufd); | |
1212 | continue; | |
1213 | } | |
1214 | } | |
d3372da9 | 1215 | } |
d3372da9 | 1216 | } |
d3372da9 | 1217 | } |
f96d0914 | 1218 | runbatches(); |
5afb0d14 | 1219 | cleansocks(); |
d3372da9 | 1220 | return(1); |
1221 | } | |
1222 | ||
f96d0914 FT |
1223 | static struct ufd *getskufd(struct socket *sk) |
1224 | { | |
1225 | while(1) { | |
1226 | if(sk->back->ufd != NULL) | |
1227 | return(sk->back->ufd); | |
1228 | if((sk = sk->back->pnext) == NULL) | |
1229 | break; | |
1230 | } | |
1231 | return(NULL); | |
1232 | } | |
1233 | ||
d3372da9 | 1234 | int socksettos(struct socket *sk, int tos) |
1235 | { | |
b020fb3d | 1236 | int buf; |
f96d0914 | 1237 | struct ufd *ufd; |
f966ec56 | 1238 | int dscp2tos; |
b020fb3d | 1239 | |
f96d0914 FT |
1240 | ufd = getskufd(sk); |
1241 | if(ufd->type != UFD_SOCK) { | |
1242 | errno = EOPNOTSUPP; | |
1243 | return(-1); | |
1244 | } | |
1245 | if(ufd->d.s.family == AF_UNIX) | |
7ab36fbd | 1246 | return(0); /* Unix sockets are always perfect. :) */ |
f96d0914 | 1247 | if(ufd->d.s.family == AF_INET) |
d3372da9 | 1248 | { |
f966ec56 | 1249 | dscp2tos = confgetint("net", "dscp-tos"); |
b020fb3d | 1250 | switch(tos) |
1251 | { | |
b198bed6 | 1252 | case 0: |
1253 | buf = 0; | |
1254 | break; | |
b020fb3d | 1255 | case SOCK_TOS_MINCOST: |
f966ec56 FT |
1256 | if(dscp2tos) |
1257 | buf = confgetint("net", "diffserv-mincost") << 2; | |
1258 | else | |
1259 | buf = 0x02; | |
b020fb3d | 1260 | break; |
1261 | case SOCK_TOS_MAXREL: | |
f966ec56 FT |
1262 | if(dscp2tos) |
1263 | buf = confgetint("net", "diffserv-maxrel") << 2; | |
1264 | else | |
1265 | buf = 0x04; | |
b020fb3d | 1266 | break; |
1267 | case SOCK_TOS_MAXTP: | |
f966ec56 FT |
1268 | if(dscp2tos) |
1269 | buf = confgetint("net", "diffserv-maxtp") << 2; | |
1270 | else | |
1271 | buf = 0x08; | |
b020fb3d | 1272 | break; |
1273 | case SOCK_TOS_MINDELAY: | |
f966ec56 FT |
1274 | if(dscp2tos) |
1275 | buf = confgetint("net", "diffserv-mindelay") << 2; | |
1276 | else | |
1277 | buf = 0x10; | |
b020fb3d | 1278 | break; |
1279 | default: | |
1280 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1281 | return(-1); | |
1282 | } | |
f96d0914 | 1283 | if(setsockopt(ufd->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1284 | { |
1285 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1286 | return(-1); | |
1287 | } | |
1288 | return(0); | |
1289 | } | |
f96d0914 | 1290 | if(ufd->d.s.family == AF_INET6) |
b020fb3d | 1291 | { |
1292 | switch(tos) | |
1293 | { | |
b198bed6 | 1294 | case 0: |
1295 | buf = 0; | |
b020fb3d | 1296 | case SOCK_TOS_MINCOST: |
1297 | buf = confgetint("net", "diffserv-mincost"); | |
1298 | break; | |
1299 | case SOCK_TOS_MAXREL: | |
1300 | buf = confgetint("net", "diffserv-maxrel"); | |
1301 | break; | |
1302 | case SOCK_TOS_MAXTP: | |
1303 | buf = confgetint("net", "diffserv-maxtp"); | |
1304 | break; | |
1305 | case SOCK_TOS_MINDELAY: | |
1306 | buf = confgetint("net", "diffserv-mindelay"); | |
1307 | break; | |
1308 | default: | |
1309 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1310 | return(-1); | |
1311 | } | |
1312 | /* | |
1313 | On Linux, the API IPv6 flow label management doesn't seem to | |
1314 | be entirely complete, so I guess this will have to wait. | |
1315 | ||
1316 | if(setsockopt(...) < 0) | |
1317 | { | |
1318 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1319 | return(-1); | |
1320 | } | |
1321 | */ | |
1322 | return(0); | |
1323 | } | |
f96d0914 | 1324 | flog(LOG_WARNING, "could not set TOS on sock of family %i", ufd->d.s.family); |
d3372da9 | 1325 | return(1); |
1326 | } | |
1327 | ||
1328 | struct resolvedata | |
1329 | { | |
1330 | int fd; | |
1331 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1332 | void *data; | |
1333 | struct sockaddr_storage addr; | |
1334 | int addrlen; | |
1335 | }; | |
1336 | ||
1337 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1338 | { | |
1339 | static char buf[80]; | |
1340 | int ret; | |
1341 | struct sockaddr_in *ipv4; | |
1342 | ||
1343 | if(!status) | |
1344 | { | |
1345 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1346 | { | |
b4d16e90 | 1347 | errno = ENOENT; |
d3372da9 | 1348 | data->callback(NULL, 0, data->data); |
1349 | } else { | |
1350 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1351 | memcpy(&ipv4->sin_addr, buf, 4); | |
1352 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1353 | } | |
1354 | } else { | |
b4d16e90 | 1355 | errno = ENOENT; |
d3372da9 | 1356 | data->callback(NULL, 0, data->data); |
1357 | } | |
1358 | close(data->fd); | |
1359 | free(data); | |
1360 | } | |
1361 | ||
1362 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1363 | { | |
1364 | int i; | |
1365 | char *p; | |
1366 | int port; | |
1367 | int pfd[2]; | |
1368 | pid_t child; | |
1369 | struct resolvedata *rdata; | |
1370 | struct sockaddr_in ipv4; | |
1371 | struct hostent *he; | |
1372 | sigset_t sigset; | |
1373 | ||
1374 | /* IPv4 */ | |
1375 | port = -1; | |
1376 | if((p = strchr(addr, ':')) != NULL) | |
1377 | { | |
1378 | *p = 0; | |
1379 | port = atoi(p + 1); | |
1380 | } | |
1381 | ipv4.sin_family = AF_INET; | |
1382 | ipv4.sin_port = htons(port); | |
1383 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1384 | { | |
1385 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1386 | } else { | |
1387 | sigemptyset(&sigset); | |
1388 | sigaddset(&sigset, SIGCHLD); | |
1389 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1390 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1391 | { | |
1392 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1393 | return(-1); | |
1394 | } | |
1395 | if(child == 0) | |
1396 | { | |
1397 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1398 | for(i = 3; i < FD_SETSIZE; i++) | |
1399 | { | |
1400 | if(i != pfd[1]) | |
1401 | close(i); | |
1402 | } | |
1403 | signal(SIGALRM, SIG_DFL); | |
1404 | alarm(30); | |
1405 | if((he = gethostbyname(addr)) == NULL) | |
1406 | exit(1); | |
1407 | write(pfd[1], he->h_addr_list[0], 4); | |
1408 | exit(0); | |
1409 | } else { | |
1410 | close(pfd[1]); | |
1411 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1412 | rdata = smalloc(sizeof(*rdata)); | |
1413 | rdata->fd = pfd[0]; | |
1414 | rdata->callback = callback; | |
1415 | rdata->data = data; | |
1416 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1417 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1418 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1419 | return(1); | |
1420 | } | |
1421 | } | |
1422 | return(0); | |
1423 | } | |
1424 | ||
f96d0914 | 1425 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
d3372da9 | 1426 | { |
1427 | socklen_t len; | |
1428 | struct sockaddr_storage name; | |
1429 | ||
1430 | *namebuf = NULL; | |
f96d0914 | 1431 | if(fd < 0) |
d3372da9 | 1432 | return(-1); |
1433 | len = sizeof(name); | |
f96d0914 | 1434 | if(getsockname(fd, (struct sockaddr *)&name, &len) < 0) |
d3372da9 | 1435 | { |
6fb0c6ac | 1436 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1437 | return(-1); |
1438 | } | |
1439 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1440 | if(lenbuf != NULL) |
1441 | *lenbuf = len; | |
d3372da9 | 1442 | return(0); |
1443 | } | |
1444 | ||
f96d0914 FT |
1445 | int lstgetlocalname(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
1446 | { | |
1447 | struct ufd *ufd; | |
1448 | ||
1449 | ufd = lp->ufd; | |
1450 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1451 | } | |
1452 | ||
1453 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1454 | { | |
1455 | struct ufd *ufd; | |
1456 | ||
1457 | ufd = getskufd(sk); | |
1458 | if(ufd->type != UFD_SOCK) { | |
1459 | errno = EOPNOTSUPP; | |
1460 | return(-1); | |
1461 | } | |
1462 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1463 | } | |
1464 | ||
eaa35963 | 1465 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1466 | { | |
1467 | if(dst->sa_family != src->sa_family) | |
1468 | { | |
1469 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1470 | return; | |
1471 | } | |
1472 | switch(src->sa_family) | |
1473 | { | |
1474 | case AF_INET: | |
1475 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1476 | break; | |
1477 | case AF_INET6: | |
1478 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1479 | break; | |
1480 | default: | |
1481 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1482 | break; | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1487 | { |
6fb0c6ac | 1488 | int ret; |
eaa35963 | 1489 | socklen_t plen; |
1490 | struct sockaddr *pname; | |
1491 | ||
1492 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1493 | { | |
1494 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1495 | return(-1); | |
1496 | } | |
1497 | if(ret) | |
1498 | return(0); | |
1499 | sethostaddr(addr, pname); | |
1500 | free(pname); | |
1501 | return(0); | |
1502 | } | |
1503 | ||
f96d0914 | 1504 | static int getremotename(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
eaa35963 | 1505 | { |
d3372da9 | 1506 | socklen_t len; |
6fb0c6ac | 1507 | struct sockaddr *name; |
f96d0914 FT |
1508 | |
1509 | switch(confgetint("net", "mode")) { | |
d3372da9 | 1510 | case 0: |
1511 | *namebuf = NULL; | |
f96d0914 | 1512 | if(!getlocalname(fd, &name, &len)) { |
6fb0c6ac | 1513 | *namebuf = name; |
1514 | *lenbuf = len; | |
eaa35963 | 1515 | makepublic(name); |
6fb0c6ac | 1516 | return(0); |
1517 | } | |
1518 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1519 | return(-1); | |
d3372da9 | 1520 | case 1: |
1521 | errno = EOPNOTSUPP; | |
1522 | return(-1); | |
1523 | default: | |
1524 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1525 | errno = EOPNOTSUPP; | |
1526 | return(-1); | |
1527 | } | |
1528 | } | |
1529 | ||
f96d0914 FT |
1530 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1531 | { | |
1532 | struct ufd *ufd; | |
1533 | ||
1534 | ufd = getskufd(sk); | |
1535 | if(ufd->type != UFD_SOCK) { | |
1536 | errno = EOPNOTSUPP; | |
1537 | return(-1); | |
1538 | } | |
1539 | if(ufd->fd < 0) { | |
1540 | errno = EBADF; | |
1541 | return(-1); | |
1542 | } | |
1543 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1544 | } | |
1545 | ||
1546 | int lstgetremotename(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1547 | { | |
1548 | struct ufd *ufd; | |
1549 | ||
1550 | ufd = lp->ufd; | |
1551 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1552 | } | |
1553 | ||
d29853b1 | 1554 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1555 | { | |
1556 | struct sockaddr *name1, *name2; | |
1557 | socklen_t len1, len2; | |
f96d0914 FT |
1558 | struct ufd *ufd1, *ufd2; |
1559 | ||
1560 | ufd1 = getskufd(sk); | |
1561 | ufd2 = getskufd(sk2); | |
1562 | if((ufd1->type != UFD_SOCK) || (ufd2->type != UFD_SOCK)) { | |
1563 | errno = EOPNOTSUPP; | |
1564 | return(-1); | |
1565 | } | |
1566 | if(ufd1->d.s.family != ufd2->d.s.family) | |
1567 | { | |
1568 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); | |
1569 | return(-1); | |
1570 | } | |
1571 | if(getremotename(ufd1->fd, &name1, &len1)) | |
1572 | return(-1); | |
1573 | if(getremotename(ufd2->fd, &name2, &len2)) { | |
1574 | free(name1); | |
1575 | return(-1); | |
1576 | } | |
1577 | sethostaddr(name1, name2); | |
1578 | free(name2); | |
1579 | *namebuf = name1; | |
1580 | *lenbuf = len1; | |
1581 | return(0); | |
1582 | } | |
1583 | ||
1584 | int lstgetremotename2(struct lport *lp, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1585 | { | |
1586 | struct sockaddr *name1, *name2; | |
1587 | socklen_t len1, len2; | |
1588 | struct ufd *ufd1, *ufd2; | |
d29853b1 | 1589 | |
f96d0914 FT |
1590 | ufd1 = lp->ufd; |
1591 | ufd2 = getskufd(sk2); | |
1592 | if(ufd2->type != UFD_SOCK) { | |
1593 | errno = EOPNOTSUPP; | |
1594 | return(-1); | |
1595 | } | |
d334fbb5 | 1596 | if(ufd1->d.l.family != ufd2->d.s.family) |
d29853b1 | 1597 | { |
d334fbb5 | 1598 | flog(LOG_ERR, "using lstgetremotename2 with sockets of differing family: %i %i", ufd1->d.l.family, ufd2->d.s.family); |
d29853b1 | 1599 | return(-1); |
1600 | } | |
f96d0914 | 1601 | if(getremotename(ufd1->fd, &name1, &len1)) |
d29853b1 | 1602 | return(-1); |
f96d0914 | 1603 | if(getremotename(ufd2->fd, &name2, &len2)) { |
d29853b1 | 1604 | free(name1); |
1605 | return(-1); | |
1606 | } | |
1607 | sethostaddr(name1, name2); | |
1608 | free(name2); | |
1609 | *namebuf = name1; | |
1610 | *lenbuf = len1; | |
1611 | return(0); | |
1612 | } | |
1613 | ||
f96d0914 FT |
1614 | int getucred(struct socket *sk, uid_t *uid, gid_t *gid) |
1615 | { | |
1616 | struct ufd *ufd; | |
1617 | ||
1618 | ufd = getskufd(sk); | |
1619 | if(ufd->type != UFD_SOCK) { | |
1620 | errno = EOPNOTSUPP; | |
1621 | return(-1); | |
1622 | } | |
1623 | if(ufd->d.s.family != AF_UNIX) { | |
1624 | errno = EOPNOTSUPP; | |
1625 | return(-1); | |
1626 | } | |
1627 | *uid = ufd->d.s.ucred.uid; | |
1628 | *gid = ufd->d.s.ucred.gid; | |
1629 | return(0); | |
1630 | } | |
1631 | ||
81286a22 FT |
1632 | /* void sockblock(struct socket *sk, int block) */ |
1633 | /* { */ | |
1634 | /* struct ufd *ufd; */ | |
f96d0914 | 1635 | |
81286a22 FT |
1636 | /* ufd = getskufd(sk); */ |
1637 | /* ufd->ignread = block; */ | |
1638 | /* } */ | |
f96d0914 FT |
1639 | |
1640 | int sockfamily(struct socket *sk) | |
1641 | { | |
1642 | struct ufd *ufd; | |
1643 | ||
1644 | ufd = getskufd(sk); | |
1645 | if(ufd->type != UFD_SOCK) { | |
1646 | errno = EOPNOTSUPP; | |
1647 | return(-1); | |
1648 | } | |
1649 | return(ufd->d.s.family); | |
02a705ad FT |
1650 | } |
1651 | ||
1652 | int sockpeeraddr(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1653 | { | |
f96d0914 FT |
1654 | struct ufd *ufd; |
1655 | ||
1656 | ufd = getskufd(sk); | |
1657 | if(ufd->type != UFD_SOCK) { | |
1658 | errno = EOPNOTSUPP; | |
1659 | return(-1); | |
1660 | } | |
1661 | if(ufd->d.s.remote == NULL) | |
1662 | return(-1); | |
1663 | *namebuf = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, ufd->d.s.remotelen); | |
1664 | if(lenbuf != NULL) | |
1665 | *lenbuf = ufd->d.s.remotelen; | |
1666 | return(0); | |
02a705ad FT |
1667 | } |
1668 | ||
1669 | char *formatsockpeer(struct socket *sk) | |
1670 | { | |
1671 | struct sockaddr *name; | |
1672 | socklen_t nlen; | |
1673 | char *ret; | |
1674 | ||
1675 | if(sockpeeraddr(sk, &name, &nlen)) | |
1676 | return(NULL); | |
1677 | ret = formataddress(name, nlen); | |
1678 | free(name); | |
1679 | return(ret); | |
1680 | } | |
1681 | ||
99a28d47 | 1682 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1683 | { | |
1684 | struct sockaddr_un *u1, *u2; | |
1685 | struct sockaddr_in *n1, *n2; | |
1686 | #ifdef HAVE_IPV6 | |
1687 | struct sockaddr_in6 *s1, *s2; | |
1688 | #endif | |
1689 | ||
1690 | if(x->sa_family != y->sa_family) | |
1691 | return(0); | |
1692 | switch(x->sa_family) { | |
1693 | case AF_UNIX: | |
1694 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1695 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1696 | return(0); | |
1697 | break; | |
1698 | case AF_INET: | |
1699 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1700 | if(n1->sin_port != n2->sin_port) | |
1701 | return(0); | |
1702 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1703 | return(0); | |
1704 | break; | |
c8a729d7 | 1705 | #ifdef HAVE_IPV6 |
99a28d47 | 1706 | case AF_INET6: |
1707 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1708 | if(s1->sin6_port != s2->sin6_port) | |
1709 | return(0); | |
1710 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1711 | return(0); | |
1712 | break; | |
c8a729d7 | 1713 | #endif |
99a28d47 | 1714 | } |
1715 | return(1); | |
1716 | } | |
1717 | ||
d3372da9 | 1718 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1719 | { | |
d3372da9 | 1720 | struct sockaddr_in *ipv4; |
1721 | #ifdef HAVE_IPV6 | |
1722 | struct sockaddr_in6 *ipv6; | |
1723 | #endif | |
1724 | static char *ret = NULL; | |
1725 | char buf[1024]; | |
1726 | ||
1727 | if(ret != NULL) | |
1728 | free(ret); | |
1729 | ret = NULL; | |
1730 | switch(arg->sa_family) | |
1731 | { | |
1732 | case AF_UNIX: | |
6a97462e | 1733 | ret = sstrdup("Unix socket"); |
d3372da9 | 1734 | break; |
1735 | case AF_INET: | |
1736 | ipv4 = (struct sockaddr_in *)arg; | |
1737 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1738 | return(NULL); | |
1739 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1740 | break; | |
1741 | #ifdef HAVE_IPV6 | |
1742 | case AF_INET6: | |
1743 | ipv6 = (struct sockaddr_in6 *)arg; | |
1744 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1745 | return(NULL); | |
fc7f7735 | 1746 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1747 | break; |
1748 | #endif | |
1749 | default: | |
1750 | errno = EPFNOSUPPORT; | |
1751 | break; | |
1752 | } | |
1753 | return(ret); | |
1754 | } | |
1755 | ||
1756 | #if 0 | |
1757 | ||
1758 | /* | |
1759 | * It was very nice to use this, but it seems | |
1760 | * to mess things up, so I guess it has to go... :-( | |
1761 | */ | |
1762 | ||
1763 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1764 | { | |
1765 | struct sockaddr *arg; | |
1766 | socklen_t arglen; | |
1767 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1768 | * lowercase letters to 1, so I do this | |
1769 | * instead. */ | |
1770 | struct sockaddr_in *ipv4; | |
1771 | int ret; | |
1772 | ||
1773 | arg = *(struct sockaddr **)(args[0]); | |
1774 | arglen = *(socklen_t *)(args[1]); | |
1775 | switch(arg->sa_family) | |
1776 | { | |
1777 | case AF_UNIX: | |
1778 | UNIX = (struct sockaddr_un *)arg; | |
1779 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1780 | break; | |
1781 | case AF_INET: | |
1782 | ipv4 = (struct sockaddr_in *)arg; | |
1783 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1784 | break; | |
1785 | default: | |
1786 | ret = -1; | |
1787 | errno = EPFNOSUPPORT; | |
1788 | break; | |
1789 | } | |
1790 | return(ret); | |
1791 | } | |
1792 | ||
1793 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1794 | { | |
1795 | if(n > 0) | |
1796 | argtypes[0] = PA_POINTER; | |
1797 | if(n > 1) | |
1798 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1799 | * be an int, so I guess this should be | |
1800 | * safe. */ | |
1801 | return(2); | |
1802 | } | |
1803 | #endif | |
1804 | ||
1805 | static int init(int hup) | |
1806 | { | |
1807 | if(!hup) | |
1808 | { | |
1809 | /* | |
1810 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1811 | { | |
1812 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1813 | return(1); | |
1814 | } | |
1815 | */ | |
1816 | } | |
1817 | return(0); | |
1818 | } | |
1819 | ||
1820 | static void terminate(void) | |
1821 | { | |
f96d0914 FT |
1822 | /* |
1823 | while(ufds != NULL) | |
1824 | freeufd(ufds); | |
1825 | */ | |
d3372da9 | 1826 | } |
1827 | ||
1828 | static struct module me = | |
1829 | { | |
1830 | .name = "net", | |
1831 | .conf = | |
1832 | { | |
1833 | .vars = myvars | |
1834 | }, | |
1835 | .init = init, | |
1836 | .terminate = terminate | |
1837 | }; | |
1838 | ||
1839 | MODULE(me) |