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