Commit | Line | Data |
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d3372da9 | 1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client | |
302a2600 | 3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | /* XXX: Implement SOCKS proxyability */ | |
20 | ||
21 | #ifdef HAVE_CONFIG_H | |
22 | #include <config.h> | |
23 | #endif | |
24 | #include <string.h> | |
25 | #include <stdlib.h> | |
26 | #include <unistd.h> | |
27 | #include <fcntl.h> | |
28 | #include <sys/ioctl.h> | |
29 | #include <sys/socket.h> | |
30 | #include <sys/un.h> | |
72a7835e | 31 | #include <sys/select.h> |
d3372da9 | 32 | #include <arpa/inet.h> |
33 | #include <netinet/in.h> | |
34 | #include <netdb.h> | |
35 | #include <sys/signal.h> | |
7ab36fbd | 36 | #include <sys/stat.h> /* For rebindunix() */ |
d3372da9 | 37 | #ifdef HAVE_LINUX_SOCKIOS_H |
38 | #include <linux/sockios.h> | |
39 | #endif | |
40 | #include <errno.h> | |
41 | #include <net/if.h> | |
42 | ||
43 | #include "conf.h" | |
44 | #include "net.h" | |
45 | #include "module.h" | |
46 | #include "log.h" | |
47 | #include "utils.h" | |
48 | #include "sysevents.h" | |
49 | ||
50 | static struct configvar myvars[] = | |
51 | { | |
d9f89ef5 | 52 | /** The network mode to use. Currently supported values are 0 for |
53 | * active mode and 1 for passive mode. In the future, SOCKS5 proxy | |
54 | * support may be added. */ | |
d3372da9 | 55 | {CONF_VAR_INT, "mode", {.num = 0}}, |
d9f89ef5 | 56 | /** Set the SO_REUSEADDR socket option on listening sockets, so |
57 | * that dead TCP connections waiting for timeout are ignored. */ | |
347d6d76 | 58 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
d9f89ef5 | 59 | /** Overrides the IPv4 address reported to other clients in active |
60 | * mode. Useful for servers behind NAT routers. If both this and | |
61 | * net.publicif are unspecified the address of the hub connection | |
62 | * is used. */ | |
d3372da9 | 63 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
d9f89ef5 | 64 | /** Specifies an interface name from which to fetch the IPv4 |
65 | * address reported to other clients in active mode. If both this | |
66 | * and net.visibleipv4 are unspecified the address of the hub | |
67 | * connection is used. */ | |
d3372da9 | 68 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
b020fb3d | 69 | /* Diffserv should be supported on IPv4, too, but I don't know the |
70 | * API to do that. */ | |
d9f89ef5 | 71 | /** The Diffserv value to use on IPv6 connections when the |
72 | * minimize cost TOS value is used (see the TOS VALUES | |
73 | * section). */ | |
b020fb3d | 74 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
d9f89ef5 | 75 | /** The Diffserv value to use on IPv6 connections when the |
76 | * maximize reliability TOS value is used (see the TOS VALUES | |
77 | * section). */ | |
b020fb3d | 78 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
d9f89ef5 | 79 | /** The Diffserv value to use on IPv6 connections when the |
80 | * maximize throughput TOS value is used (see the TOS VALUES | |
81 | * section). */ | |
b020fb3d | 82 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
d9f89ef5 | 83 | /** The Diffserv value to use on IPv6 connections when the |
84 | * minimize delay TOS value is used (see the TOS VALUES | |
85 | * section). */ | |
b020fb3d | 86 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
d3372da9 | 87 | {CONF_VAR_END} |
88 | }; | |
89 | ||
02a705ad FT |
90 | #define UFD_SOCK 0 |
91 | #define UFD_PIPE 1 | |
92 | #define UFD_LISTEN 2 | |
93 | ||
94 | struct scons { | |
95 | struct scons *n, *p; | |
96 | struct socket *s; | |
97 | }; | |
98 | ||
99 | struct ufd { | |
100 | struct ufd *next, *prev; | |
101 | int fd; | |
102 | int type; | |
103 | int ignread; | |
104 | struct socket *sk; | |
105 | union { | |
106 | struct { | |
107 | int family; | |
108 | int type; | |
109 | struct sockaddr *remote; | |
110 | socklen_t remotelen; | |
111 | struct { | |
112 | uid_t uid; | |
113 | gid_t gid; | |
114 | } ucred; | |
115 | } s; | |
116 | struct { | |
117 | struct lport *lp; | |
118 | int family; | |
119 | } l; | |
120 | } d; | |
121 | }; | |
122 | ||
40c21c4f FT |
123 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf); |
124 | ||
02a705ad FT |
125 | static struct ufd *ufds = NULL; |
126 | static struct scons *rbatch, *wbatch, *cbatch; | |
d3372da9 | 127 | int numsocks = 0; |
128 | ||
129 | /* XXX: Get autoconf for all this... */ | |
130 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) | |
131 | { | |
132 | struct sockaddr_in *ipv4; | |
133 | struct configvar *var; | |
134 | void *bufend; | |
135 | int sock; | |
136 | struct ifconf conf; | |
137 | struct ifreq *ifr, req; | |
138 | char *pif; | |
139 | ||
140 | if(af == AF_INET) | |
141 | { | |
142 | var = confgetvar("net", "visibleipv4"); | |
143 | if(var->val.ipv4.s_addr != 0) | |
144 | { | |
145 | ipv4 = smalloc(sizeof(*ipv4)); | |
146 | ipv4->sin_family = AF_INET; | |
147 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; | |
148 | *addr = (struct sockaddr *)ipv4; | |
149 | *lenbuf = sizeof(*ipv4); | |
150 | return(0); | |
151 | } | |
bcb73bb3 | 152 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 | 153 | { |
154 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); | |
155 | return(-1); | |
156 | } | |
6fb0c6ac | 157 | if(!strcmp(pif, "")) |
158 | return(1); | |
d3372da9 | 159 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
160 | return(-1); | |
161 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); | |
162 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
163 | { | |
164 | free(conf.ifc_buf); | |
165 | close(sock); | |
166 | return(-1); | |
167 | } | |
168 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; | |
169 | ipv4 = NULL; | |
170 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) | |
171 | { | |
1315d02a | 172 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac | 173 | continue; |
d3372da9 | 174 | memset(&req, 0, sizeof(req)); |
175 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); | |
176 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) | |
6fb0c6ac | 177 | break; |
178 | if(!(req.ifr_flags & IFF_UP)) | |
d3372da9 | 179 | { |
6fb0c6ac | 180 | flog(LOG_WARNING, "public interface is down"); |
181 | break; | |
d3372da9 | 182 | } |
6fb0c6ac | 183 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 | 184 | { |
6fb0c6ac | 185 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
186 | break; | |
d3372da9 | 187 | } |
6fb0c6ac | 188 | ipv4 = smalloc(sizeof(*ipv4)); |
189 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); | |
190 | break; | |
d3372da9 | 191 | } |
bcb73bb3 | 192 | free(conf.ifc_buf); |
d3372da9 | 193 | close(sock); |
194 | if(ipv4 != NULL) | |
195 | { | |
196 | *addr = (struct sockaddr *)ipv4; | |
197 | *lenbuf = sizeof(*ipv4); | |
198 | return(0); | |
199 | } | |
200 | errno = ENETDOWN; | |
201 | return(-1); | |
202 | } | |
6fb0c6ac | 203 | return(1); |
d3372da9 | 204 | } |
205 | ||
02a705ad | 206 | static struct socket *newsock1(int dgram) |
d3372da9 | 207 | { |
208 | struct socket *new; | |
209 | ||
02a705ad FT |
210 | new = memset(smalloc(sizeof(*new)), 0, sizeof(*new)); |
211 | new->refcount = 1; | |
d3372da9 | 212 | new->state = -1; |
02a705ad | 213 | new->dgram = dgram; |
81286a22 | 214 | new->maxbuf = 65536; |
d3372da9 | 215 | numsocks++; |
216 | return(new); | |
217 | } | |
218 | ||
02a705ad FT |
219 | static struct socket *sockpair(int dgram) |
220 | { | |
221 | struct socket *s1, *s2; | |
222 | ||
223 | s1 = newsock1(dgram); | |
224 | s2 = newsock1(dgram); | |
225 | s1->back = s2; | |
226 | s2->back = s1; | |
227 | putsock(s2); | |
228 | return(s1); | |
229 | } | |
230 | ||
231 | static void sksetstate(struct socket *sk, int state) | |
232 | { | |
233 | sk->state = state; | |
234 | sk->back->state = state; | |
235 | } | |
236 | ||
1ce5968e FT |
237 | struct socket *netsockpipe(void) |
238 | { | |
239 | struct socket *sk; | |
240 | ||
241 | sk = sockpair(0); | |
242 | sksetstate(sk, SOCK_EST); | |
243 | return(sk); | |
244 | } | |
245 | ||
02a705ad FT |
246 | static void closeufd(struct ufd *ufd) |
247 | { | |
248 | if(ufd->fd != -1) | |
249 | close(ufd->fd); | |
250 | ufd->fd = -1; | |
251 | } | |
252 | ||
253 | static void freeufd(struct ufd *ufd) | |
254 | { | |
255 | if(ufd->next != NULL) | |
256 | ufd->next->prev = ufd->prev; | |
257 | if(ufd->prev != NULL) | |
258 | ufd->prev->next = ufd->next; | |
259 | if(ufd == ufds) | |
260 | ufds = ufd->next; | |
261 | closeufd(ufd); | |
5afb0d14 FT |
262 | if(ufd->sk != NULL) |
263 | putsock(ufd->sk); | |
02a705ad FT |
264 | if(ufd->type == UFD_SOCK) { |
265 | if(ufd->d.s.remote != NULL) | |
266 | free(ufd->d.s.remote); | |
267 | } | |
268 | free(ufd); | |
269 | } | |
270 | ||
271 | static struct ufd *mkufd(int fd, int type, struct socket *sk) | |
272 | { | |
273 | struct ufd *ufd; | |
274 | ||
275 | ufd = memset(smalloc(sizeof(*ufd)), 0, sizeof(*ufd)); | |
276 | ufd->fd = fd; | |
5afb0d14 | 277 | ufd->type = type; |
02a705ad FT |
278 | if(sk != NULL) { |
279 | getsock(ufd->sk = sk); | |
280 | sk->ufd = ufd; | |
281 | } | |
282 | if(type == UFD_SOCK) { | |
283 | ufd->d.s.ucred.uid = -1; | |
284 | ufd->d.s.ucred.gid = -1; | |
285 | } | |
286 | ufd->next = ufds; | |
287 | if(ufds) | |
288 | ufds->prev = ufd; | |
289 | ufds = ufd; | |
290 | return(ufd); | |
291 | } | |
292 | ||
293 | static struct ufd *dupufd(struct ufd *ufd) | |
294 | { | |
295 | struct ufd *nufd; | |
296 | struct socket *nsk; | |
297 | ||
298 | if(ufd->sk != NULL) | |
299 | nsk = sockpair(ufd->sk->dgram); | |
300 | else | |
301 | nsk = NULL; | |
302 | nufd = mkufd(ufd->fd, ufd->type, nsk); | |
303 | if(nsk != NULL) | |
304 | putsock(nsk); | |
305 | if((nufd->fd = dup(ufd->fd)) < 0) | |
306 | { | |
307 | flog(LOG_WARNING, "could not dup() fd: %s", strerror(errno)); | |
308 | freeufd(nufd); | |
309 | return(NULL); | |
310 | } | |
5afb0d14 | 311 | sksetstate(nsk, SOCK_EST); |
02a705ad FT |
312 | if(ufd->type == UFD_SOCK) { |
313 | nufd->d.s.family = ufd->d.s.family; | |
314 | nufd->d.s.type = ufd->d.s.type; | |
315 | nufd->d.s.ucred.uid = ufd->d.s.ucred.uid; | |
316 | nufd->d.s.ucred.gid = ufd->d.s.ucred.gid; | |
317 | if(ufd->d.s.remote != NULL) | |
318 | nufd->d.s.remote = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, nufd->d.s.remotelen = ufd->d.s.remotelen); | |
319 | } else if(ufd->type == UFD_LISTEN) { | |
320 | nufd->d.l.family = ufd->d.l.family; | |
321 | } | |
322 | return(nufd); | |
323 | } | |
324 | ||
d3372da9 | 325 | static struct socket *mksock(int domain, int type) |
326 | { | |
327 | int fd; | |
02a705ad FT |
328 | struct socket *sk; |
329 | struct ufd *ufd; | |
d3372da9 | 330 | |
331 | if((fd = socket(domain, type, 0)) < 0) | |
332 | { | |
333 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
334 | return(NULL); | |
335 | } | |
02a705ad FT |
336 | sk = sockpair(type == SOCK_DGRAM); |
337 | ufd = mkufd(fd, UFD_SOCK, sk); | |
338 | ufd->d.s.family = domain; | |
339 | ufd->d.s.type = type; | |
d3372da9 | 340 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 341 | return(sk); |
d3372da9 | 342 | } |
343 | ||
344 | struct socket *wrapsock(int fd) | |
345 | { | |
02a705ad FT |
346 | struct socket *sk; |
347 | struct ufd *ufd; | |
d3372da9 | 348 | |
02a705ad FT |
349 | sk = sockpair(0); |
350 | ufd = mkufd(fd, UFD_PIPE, sk->back); | |
351 | sksetstate(sk, SOCK_EST); | |
d3372da9 | 352 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 353 | return(sk); |
d3372da9 | 354 | } |
355 | ||
356 | void getsock(struct socket *sk) | |
357 | { | |
358 | sk->refcount++; | |
359 | } | |
360 | ||
b2e73d7b FT |
361 | static void sockdebug(int level, struct socket *sk, char *format, ...) |
362 | { | |
363 | va_list args; | |
364 | ||
365 | if((sk->dbgnm == NULL) || (level < sk->dbglvl)) | |
366 | return; | |
367 | va_start(args, format); | |
368 | vfprintf(stderr, format, args); | |
369 | va_end(args); | |
370 | } | |
371 | ||
372 | void socksetdebug(struct socket *sk, int level, char *nm, ...) | |
373 | { | |
374 | va_list args; | |
375 | char *tb; | |
376 | ||
377 | va_start(args, nm); | |
378 | tb = vsprintf2(nm, args); | |
379 | va_end(args); | |
380 | sk->dbgnm = sprintf2("%s (f)", tb); | |
381 | sk->back->dbgnm = sprintf2("%s (b)", tb); | |
382 | free(tb); | |
383 | sk->dbglvl = level; | |
384 | sk->back->dbglvl = level; | |
385 | } | |
386 | ||
02a705ad | 387 | static void freesock(struct socket *sk) |
d3372da9 | 388 | { |
389 | struct dgrambuf *buf; | |
390 | ||
b2e73d7b | 391 | sockdebug(1, sk, "freeing socket"); |
02a705ad FT |
392 | if(sk->dgram) { |
393 | while((buf = sk->buf.d.f) != NULL) { | |
394 | sk->buf.d.f = buf->next; | |
395 | freedgbuf(buf); | |
d3372da9 | 396 | } |
02a705ad FT |
397 | } else { |
398 | if(sk->buf.s.buf != NULL) | |
399 | free(sk->buf.s.buf); | |
400 | } | |
b2e73d7b FT |
401 | if(sk->dbgnm != NULL) |
402 | free(sk->dbgnm); | |
02a705ad FT |
403 | free(sk); |
404 | numsocks--; | |
405 | } | |
406 | ||
407 | void putsock(struct socket *sk) | |
408 | { | |
7dddb551 FT |
409 | struct socket *back; |
410 | ||
02a705ad FT |
411 | if(--(sk->refcount) < 0) { |
412 | flog(LOG_CRIT, "BUG: socket refcount < 0"); | |
413 | abort(); | |
414 | } | |
415 | if((sk->refcount == 0) && (sk->back->refcount == 0)) { | |
7dddb551 | 416 | back = sk->back; |
02a705ad | 417 | freesock(sk); |
7dddb551 | 418 | freesock(back); |
02a705ad FT |
419 | } |
420 | } | |
421 | ||
1ff9e8ea FT |
422 | void quitsock(struct socket *sk) |
423 | { | |
424 | sk->readcb = NULL; | |
425 | sk->writecb = NULL; | |
426 | sk->errcb = NULL; | |
427 | putsock(sk); | |
428 | } | |
429 | ||
02a705ad FT |
430 | static void linksock(struct scons **list, struct socket *sk) |
431 | { | |
432 | struct scons *sc; | |
433 | ||
434 | for(sc = *list; sc != NULL; sc = sc->n) { | |
435 | if(sc->s == sk) | |
436 | return; | |
d3372da9 | 437 | } |
02a705ad FT |
438 | sc = smalloc(sizeof(*sc)); |
439 | getsock(sc->s = sk); | |
440 | sc->n = *list; | |
441 | sc->p = NULL; | |
442 | if(*list) | |
443 | (*list)->p = sc; | |
444 | *list = sc; | |
d3372da9 | 445 | } |
446 | ||
336539c2 | 447 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
448 | { | |
02a705ad FT |
449 | if(size == 0) |
450 | return; | |
451 | if(sk->dgram) { | |
336539c2 | 452 | /* XXX */ |
02a705ad FT |
453 | } else { |
454 | sizebuf(&sk->buf.s.buf, &sk->buf.s.bufsize, sk->buf.s.datasize + size, 1, 1); | |
455 | memmove(sk->buf.s.buf + size, sk->buf.s.buf, sk->buf.s.datasize); | |
456 | memcpy(sk->buf.s.buf, buf, size); | |
457 | sk->buf.s.datasize += size; | |
458 | linksock(&rbatch, sk); | |
336539c2 | 459 | } |
02a705ad FT |
460 | } |
461 | ||
462 | /* Read as the preterite of `read' */ | |
463 | void sockread(struct socket *sk) | |
464 | { | |
5afb0d14 FT |
465 | if((sockgetdatalen(sk) == 0) && (sk->eos == 1)) |
466 | linksock(&rbatch, sk); | |
02a705ad FT |
467 | linksock(&wbatch, sk->back); |
468 | } | |
469 | ||
470 | void freedgbuf(struct dgrambuf *dg) | |
471 | { | |
472 | if(dg->data != NULL) | |
473 | free(dg->data); | |
474 | if(dg->addr != NULL) | |
475 | free(dg->addr); | |
476 | free(dg); | |
477 | } | |
478 | ||
479 | struct dgrambuf *sockgetdgbuf(struct socket *sk) | |
480 | { | |
481 | struct dgrambuf *dbuf; | |
482 | ||
483 | if((dbuf = sk->buf.d.f) == NULL) | |
484 | return(NULL); | |
485 | sk->buf.d.f = dbuf->next; | |
486 | if(dbuf->next == NULL) | |
487 | sk->buf.d.l = NULL; | |
488 | dbuf->next = NULL; | |
489 | sockread(sk); | |
490 | return(dbuf); | |
336539c2 | 491 | } |
492 | ||
d3372da9 | 493 | void *sockgetinbuf(struct socket *sk, size_t *size) |
494 | { | |
495 | void *buf; | |
496 | struct dgrambuf *dbuf; | |
497 | ||
02a705ad FT |
498 | if(sk->dgram) { |
499 | dbuf = sockgetdgbuf(sk); | |
d3372da9 | 500 | buf = dbuf->data; |
501 | *size = dbuf->size; | |
502 | free(dbuf->addr); | |
503 | free(dbuf); | |
02a705ad FT |
504 | } else { |
505 | if((sk->buf.s.buf == NULL) || (sk->buf.s.datasize == 0)) | |
506 | { | |
507 | *size = 0; | |
b2e73d7b | 508 | sockdebug(2, sk, "read 0 bytes", *size); |
02a705ad FT |
509 | return(NULL); |
510 | } | |
511 | buf = sk->buf.s.buf; | |
512 | *size = sk->buf.s.datasize; | |
513 | sk->buf.s.buf = NULL; | |
514 | sk->buf.s.bufsize = sk->buf.s.datasize = 0; | |
515 | sockread(sk); | |
d3372da9 | 516 | } |
b2e73d7b | 517 | sockdebug(2, sk, "read %ji bytes", *size); |
02a705ad FT |
518 | return(buf); |
519 | } | |
520 | ||
521 | void sockqueue(struct socket *sk, void *data, size_t size) | |
522 | { | |
523 | struct dgrambuf *new; | |
524 | struct sockaddr *remote; | |
525 | socklen_t remotelen; | |
526 | ||
b2e73d7b | 527 | sockdebug(2, sk, "queued %ji bytes", size); |
02a705ad FT |
528 | if(size == 0) |
529 | return; | |
530 | if(sk->state == SOCK_STL) | |
531 | return; | |
532 | if(sk->dgram) { | |
533 | if(sockpeeraddr(sk, &remote, &remotelen)) | |
534 | return; | |
535 | new = smalloc(sizeof(*new)); | |
536 | new->next = NULL; | |
537 | memcpy(new->data = smalloc(size), data, new->size = size); | |
538 | new->addr = remote; | |
539 | new->addrlen = remotelen; | |
540 | if(sk->back->buf.d.l == NULL) | |
541 | { | |
542 | sk->back->buf.d.l = sk->back->buf.d.f = new; | |
543 | } else { | |
544 | sk->back->buf.d.l->next = new; | |
545 | sk->back->buf.d.l = new; | |
546 | } | |
547 | } else { | |
548 | sizebuf(&(sk->back->buf.s.buf), &(sk->back->buf.s.bufsize), sk->back->buf.s.datasize + size, 1, 1); | |
549 | memcpy(sk->back->buf.s.buf + sk->back->buf.s.datasize, data, size); | |
550 | sk->back->buf.s.datasize += size; | |
551 | } | |
552 | linksock(&rbatch, sk->back); | |
553 | } | |
554 | ||
555 | void sockqueuedg(struct socket *sk, struct dgrambuf *dg) | |
556 | { | |
557 | if(sk->state == SOCK_STL) { | |
558 | freedgbuf(dg); | |
559 | return; | |
560 | } | |
561 | if(!sk->dgram) { | |
562 | flog(LOG_ERR, "BUG: sockqueuedg called on non-dgram socket"); | |
563 | freedgbuf(dg); | |
564 | return; | |
565 | } | |
566 | dg->next = NULL; | |
567 | if(sk->back->buf.d.l == NULL) | |
568 | { | |
569 | sk->back->buf.d.l = sk->back->buf.d.f = dg; | |
570 | } else { | |
571 | sk->back->buf.d.l->next = dg; | |
572 | sk->back->buf.d.l = dg; | |
573 | } | |
574 | linksock(&rbatch, sk->back); | |
575 | } | |
576 | ||
40c21c4f | 577 | void sockerror(struct socket *sk, int en) |
02a705ad FT |
578 | { |
579 | sksetstate(sk, SOCK_STL); | |
580 | if(sk->back->errcb != NULL) | |
581 | sk->back->errcb(sk->back, en, sk->back->data); | |
d3372da9 | 582 | } |
583 | ||
02a705ad | 584 | static void recvcmsg(struct ufd *ufd, struct msghdr *msg) |
9e5f2b29 | 585 | { |
586 | struct cmsghdr *cmsg; | |
9e5f2b29 | 587 | |
588 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
589 | { | |
a8c5ada6 | 590 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 591 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
592 | { | |
a8c5ada6 | 593 | struct ucred *cred; |
02a705ad | 594 | if(ufd->d.s.ucred.uid == -1) |
9e5f2b29 | 595 | { |
596 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
02a705ad FT |
597 | ufd->d.s.ucred.uid = cred->uid; |
598 | ufd->d.s.ucred.gid = cred->gid; | |
9e5f2b29 | 599 | } |
600 | } | |
a8c5ada6 | 601 | #endif |
9e5f2b29 | 602 | } |
603 | } | |
604 | ||
02a705ad FT |
605 | static int ufddgram(struct ufd *ufd) |
606 | { | |
607 | int dgram; | |
608 | ||
609 | if(ufd->type == UFD_SOCK) { | |
610 | dgram = ufd->d.s.type == SOCK_DGRAM; | |
611 | } else if(ufd->type == UFD_PIPE) { | |
612 | dgram = 0; | |
613 | } else { | |
614 | flog(LOG_ERR, "BUG: calling ufddgram on ufd of bad type %i", ufd->type); | |
615 | return(-1); | |
616 | } | |
617 | if(ufd->sk == NULL) { | |
618 | flog(LOG_ERR, "BUG: calling ufddgram on socketless ufd (type %i)", ufd->type); | |
619 | return(-1); | |
620 | } | |
621 | if(dgram != ufd->sk->dgram) { | |
622 | flog(LOG_ERR, "BUG: ufd/socket dgram value mismatch"); | |
623 | return(-1); | |
624 | } | |
625 | return(dgram); | |
626 | } | |
627 | ||
628 | static void sockrecv(struct ufd *ufd) | |
d3372da9 | 629 | { |
630 | int ret, inq; | |
02a705ad | 631 | int dgram; |
d3372da9 | 632 | struct dgrambuf *dbuf; |
9e5f2b29 | 633 | struct msghdr msg; |
634 | char cbuf[65536]; | |
635 | struct iovec bufvec; | |
02a705ad | 636 | void *buf; |
d3372da9 | 637 | |
9e5f2b29 | 638 | memset(&msg, 0, sizeof(msg)); |
639 | msg.msg_iov = &bufvec; | |
640 | msg.msg_iovlen = 1; | |
641 | msg.msg_control = cbuf; | |
642 | msg.msg_controllen = sizeof(cbuf); | |
02a705ad FT |
643 | if((dgram = ufddgram(ufd)) < 0) |
644 | return; | |
645 | if(dgram) { | |
9e5f2b29 | 646 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
02a705ad | 647 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
d3372da9 | 648 | { |
649 | /* I don't really know what could go wrong here, so let's | |
650 | * assume it's transient. */ | |
02a705ad | 651 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), ufd->fd); |
d3372da9 | 652 | return; |
653 | } | |
9e5f2b29 | 654 | #else |
655 | inq = 65536; | |
656 | #endif | |
d3372da9 | 657 | dbuf = smalloc(sizeof(*dbuf)); |
658 | dbuf->data = smalloc(inq); | |
659 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 660 | msg.msg_name = dbuf->addr; |
661 | msg.msg_namelen = dbuf->addrlen; | |
662 | bufvec.iov_base = dbuf->data; | |
663 | bufvec.iov_len = inq; | |
02a705ad | 664 | ret = recvmsg(ufd->fd, &msg, 0); |
9e5f2b29 | 665 | dbuf->addrlen = msg.msg_namelen; |
d3372da9 | 666 | if(ret < 0) |
667 | { | |
02a705ad | 668 | freedgbuf(dbuf); |
d3372da9 | 669 | if((errno == EINTR) || (errno == EAGAIN)) |
670 | return; | |
02a705ad FT |
671 | closeufd(ufd); |
672 | sockerror(ufd->sk, errno); | |
d3372da9 | 673 | return; |
674 | } | |
9e5f2b29 | 675 | if(msg.msg_flags & MSG_CTRUNC) |
676 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
677 | else | |
02a705ad | 678 | recvcmsg(ufd, &msg); |
d3372da9 | 679 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
680 | * have EOF), but rather an empty packet. I don't know if any | |
681 | * other potential DGRAM protocols might have an EOF | |
682 | * condition, so let's play safe. */ | |
683 | if(ret == 0) | |
684 | { | |
02a705ad FT |
685 | freedgbuf(dbuf); |
686 | if((ufd->type != UFD_SOCK) || !((ufd->d.s.family == AF_INET) || (ufd->d.s.family == AF_INET6))) | |
d3372da9 | 687 | { |
40c21c4f | 688 | closesock(ufd->sk); |
02a705ad | 689 | closeufd(ufd); |
d3372da9 | 690 | } |
691 | return; | |
692 | } | |
693 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
694 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
695 | dbuf->next = NULL; | |
02a705ad FT |
696 | sockqueuedg(ufd->sk, dbuf); |
697 | } else { | |
698 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
699 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
700 | * how to read the inqueue size on other OSs */ | |
701 | if(ufd->type == UFD_SOCK) { | |
702 | if(ioctl(ufd->fd, SIOCINQ, &inq)) | |
703 | { | |
704 | /* I don't really know what could go wrong here, so let's | |
705 | * assume it's transient. */ | |
706 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), ufd->fd); | |
707 | inq = 2048; | |
708 | } | |
709 | } else { | |
710 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
711 | inq = 65536; | |
712 | } | |
713 | #else | |
714 | inq = 2048; | |
715 | #endif | |
716 | if(inq > 65536) | |
717 | inq = 65536; | |
718 | /* This part could be optimized by telling the kernel to read | |
719 | * directly into ufd->sk->back->buf, but that would be uglier | |
720 | * by not using the socket function interface. */ | |
721 | buf = smalloc(inq); | |
722 | if(ufd->type == UFD_SOCK) | |
723 | { | |
724 | bufvec.iov_base = buf; | |
725 | bufvec.iov_len = inq; | |
726 | ret = recvmsg(ufd->fd, &msg, 0); | |
727 | } else { | |
728 | ret = read(ufd->fd, buf, inq); | |
729 | msg.msg_controllen = 0; | |
730 | msg.msg_flags = 0; | |
731 | } | |
732 | if(ret < 0) | |
733 | { | |
734 | free(buf); | |
735 | if((errno == EINTR) || (errno == EAGAIN)) | |
736 | return; | |
737 | closeufd(ufd); | |
738 | sockerror(ufd->sk, errno); | |
739 | return; | |
740 | } | |
741 | if(msg.msg_flags & MSG_CTRUNC) | |
742 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
d3372da9 | 743 | else |
02a705ad FT |
744 | recvcmsg(ufd, &msg); |
745 | if(ret == 0) | |
746 | { | |
747 | free(buf); | |
748 | closeufd(ufd); | |
40c21c4f | 749 | closesock(ufd->sk); |
02a705ad FT |
750 | return; |
751 | } | |
752 | sockqueue(ufd->sk, buf, ret); | |
753 | free(buf); | |
d3372da9 | 754 | } |
755 | } | |
756 | ||
89d650f1 | 757 | static int sockflush(struct ufd *ufd) |
d3372da9 | 758 | { |
759 | int ret; | |
760 | struct dgrambuf *dbuf; | |
02a705ad | 761 | int dgram; |
d3372da9 | 762 | |
89d650f1 FT |
763 | if((dgram = ufddgram(ufd)) < 0) { |
764 | errno = EBADFD; | |
765 | return(-1); | |
766 | } | |
02a705ad FT |
767 | if(dgram) { |
768 | dbuf = sockgetdgbuf(ufd->sk); | |
769 | sendto(ufd->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
770 | freedgbuf(dbuf); | |
771 | } else { | |
772 | if(ufd->type == UFD_SOCK) | |
773 | ret = send(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
d3372da9 | 774 | else |
02a705ad | 775 | ret = write(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize); |
89d650f1 FT |
776 | if(ret < 0) |
777 | return(-1); | |
02a705ad FT |
778 | if(ret > 0) { |
779 | memmove(ufd->sk->buf.s.buf, ((char *)ufd->sk->buf.s.buf) + ret, ufd->sk->buf.s.datasize -= ret); | |
780 | sockread(ufd->sk); | |
d3372da9 | 781 | } |
d3372da9 | 782 | } |
89d650f1 | 783 | return(0); |
d3372da9 | 784 | } |
785 | ||
786 | void closesock(struct socket *sk) | |
787 | { | |
b2e73d7b | 788 | sockdebug(1, sk, "closed"); |
02a705ad | 789 | sksetstate(sk, SOCK_STL); |
40c21c4f FT |
790 | if(sk->back->eos == 0) |
791 | sk->back->eos = 1; | |
792 | linksock(&rbatch, sk->back); | |
d3372da9 | 793 | } |
794 | ||
795 | size_t sockgetdatalen(struct socket *sk) | |
796 | { | |
797 | struct dgrambuf *b; | |
798 | size_t ret; | |
799 | ||
02a705ad | 800 | if(sk->dgram) { |
d3372da9 | 801 | ret = 0; |
02a705ad | 802 | for(b = sk->buf.d.f; b != NULL; b = b->next) |
d3372da9 | 803 | ret += b->size; |
02a705ad FT |
804 | } else { |
805 | ret = sk->buf.s.datasize; | |
d3372da9 | 806 | } |
807 | return(ret); | |
808 | } | |
809 | ||
81286a22 FT |
810 | /* size_t sockqueuesize(struct socket *sk) */ |
811 | /* { */ | |
812 | /* return(sockgetdatalen(sk->back)); */ | |
813 | /* } */ | |
814 | ||
1ff9e8ea FT |
815 | size_t socktqueuesize(struct socket *sk) |
816 | { | |
817 | size_t ret; | |
818 | ||
819 | ret = 0; | |
820 | while(1) { | |
821 | ret += sockgetdatalen(sk->back); | |
822 | if((sk = sk->back->pnext) == NULL) | |
823 | return(ret); | |
824 | } | |
825 | } | |
826 | ||
81286a22 | 827 | ssize_t sockqueueleft(struct socket *sk) |
d3372da9 | 828 | { |
81286a22 | 829 | return(sk->back->maxbuf - sockgetdatalen(sk->back)); |
d3372da9 | 830 | } |
831 | ||
d3372da9 | 832 | /* |
7ab36fbd | 833 | * Seriously, I don't know if it's naughty or not to remove |
834 | * pre-existing Unix sockets. | |
835 | */ | |
02a705ad | 836 | static int rebindunix(struct ufd *ufd, struct sockaddr *name, socklen_t namelen) |
7ab36fbd | 837 | { |
838 | struct sockaddr_un *un; | |
839 | struct stat sb; | |
840 | ||
02a705ad | 841 | if((ufd->d.l.family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
7ab36fbd | 842 | return(-1); |
843 | un = (struct sockaddr_un *)name; | |
844 | if(stat(un->sun_path, &sb)) | |
845 | return(-1); | |
846 | if(!S_ISSOCK(sb.st_mode)) | |
847 | return(-1); | |
848 | if(unlink(un->sun_path)) | |
849 | return(-1); | |
02a705ad | 850 | if(bind(ufd->fd, name, namelen) < 0) |
7ab36fbd | 851 | return(-1); |
852 | return(0); | |
853 | } | |
854 | ||
f96d0914 FT |
855 | void closelport(struct lport *lp) |
856 | { | |
40c21c4f FT |
857 | struct ufd *ufd; |
858 | struct sockaddr_un *un; | |
859 | ||
860 | ufd = lp->ufd; | |
861 | if((ufd->d.l.family == AF_UNIX) && !getlocalname(ufd->fd, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX) && strchr(un->sun_path, '/')) { | |
862 | if(unlink(un->sun_path)) | |
863 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); | |
864 | } | |
f96d0914 FT |
865 | freeufd(lp->ufd); |
866 | } | |
867 | ||
7ab36fbd | 868 | /* |
d3372da9 | 869 | * The difference between netcslisten() and netcslistenlocal() is that |
870 | * netcslistenlocal() always listens on the local host, instead of | |
871 | * following proxy/passive mode directions. It is suitable for eg. the | |
872 | * UI channel, while the file sharing networks should, naturally, use | |
873 | * netcslisten() instead. | |
874 | */ | |
875 | ||
02a705ad | 876 | struct lport *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
d3372da9 | 877 | { |
02a705ad FT |
878 | struct lport *lp; |
879 | struct ufd *ufd; | |
880 | int fd; | |
66c517d2 | 881 | int intbuf; |
d3372da9 | 882 | |
883 | /* I don't know if this is actually correct (it probably isn't), | |
884 | * but since, at on least Linux systems, PF_* are specifically | |
885 | * #define'd to their AF_* counterparts, it allows for a severely | |
886 | * smoother implementation. If it breaks something on your | |
887 | * platform, please tell me so. | |
888 | */ | |
02a705ad | 889 | if((fd = socket(name->sa_family, type, 0)) < 0) |
d3372da9 | 890 | return(NULL); |
02a705ad | 891 | if(confgetint("net", "reuseaddr")) { |
687b2ee2 | 892 | intbuf = 1; |
02a705ad | 893 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
687b2ee2 | 894 | } |
02a705ad | 895 | ufd = mkufd(fd, UFD_LISTEN, NULL); |
02a705ad | 896 | ufd->d.l.family = name->sa_family; |
f96d0914 FT |
897 | lp = memset(smalloc(sizeof(*lp)), 0, sizeof(*lp)); |
898 | lp->ufd = ufd; | |
899 | ufd->d.l.lp = lp; | |
02a705ad FT |
900 | if((bind(fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(ufd, name, namelen) < 0))) { |
901 | freeufd(ufd); | |
d3372da9 | 902 | return(NULL); |
903 | } | |
02a705ad | 904 | if(listen(fd, 16) < 0) |
d3372da9 | 905 | { |
02a705ad | 906 | freeufd(ufd); |
d3372da9 | 907 | return(NULL); |
908 | } | |
02a705ad FT |
909 | lp->acceptcb = func; |
910 | lp->data = data; | |
911 | return(lp); | |
d3372da9 | 912 | } |
913 | ||
02a705ad | 914 | struct lport *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
c23acc61 | 915 | { |
916 | if(confgetint("net", "mode") == 1) | |
917 | { | |
918 | errno = EOPNOTSUPP; | |
919 | return(NULL); | |
920 | } | |
c23acc61 | 921 | if(confgetint("net", "mode") == 0) |
922 | return(netcslistenlocal(type, name, namelen, func, data)); | |
923 | errno = EOPNOTSUPP; | |
924 | return(NULL); | |
925 | } | |
926 | ||
02a705ad | 927 | struct lport *netcstcplisten(int port, int local, void (*func)(struct lport *, struct socket *, void *), void *data) |
0a1bc5b1 | 928 | { |
929 | struct sockaddr_in addr; | |
930 | #ifdef HAVE_IPV6 | |
931 | struct sockaddr_in6 addr6; | |
932 | #endif | |
02a705ad FT |
933 | struct lport *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct lport *, struct socket *, void *), void *); |
934 | struct lport *ret; | |
0a1bc5b1 | 935 | |
936 | if(local) | |
937 | csfunc = netcslistenlocal; | |
938 | else | |
939 | csfunc = netcslisten; | |
940 | #ifdef HAVE_IPV6 | |
941 | memset(&addr6, 0, sizeof(addr6)); | |
942 | addr6.sin6_family = AF_INET6; | |
943 | addr6.sin6_port = htons(port); | |
944 | addr6.sin6_addr = in6addr_any; | |
945 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
946 | return(ret); | |
947 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
948 | return(NULL); | |
949 | #endif | |
950 | memset(&addr, 0, sizeof(addr)); | |
951 | addr.sin_family = AF_INET; | |
952 | addr.sin_port = htons(port); | |
953 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
954 | } | |
955 | ||
d3372da9 | 956 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
957 | { | |
958 | struct socket *sk; | |
959 | int mode; | |
960 | ||
961 | mode = confgetint("net", "mode"); | |
962 | if((mode == 0) || (mode == 1)) | |
963 | { | |
964 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
965 | return(NULL); | |
02a705ad | 966 | if(bind(sk->ufd->fd, name, namelen) < 0) |
d3372da9 | 967 | { |
968 | putsock(sk); | |
969 | return(NULL); | |
970 | } | |
02a705ad FT |
971 | sksetstate(sk, SOCK_EST); |
972 | return(sk->back); | |
d3372da9 | 973 | } |
974 | errno = EOPNOTSUPP; | |
975 | return(NULL); | |
976 | } | |
977 | ||
02a705ad | 978 | struct socket *netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
d3372da9 | 979 | { |
02a705ad | 980 | struct ufd *nufd; |
d3372da9 | 981 | |
02a705ad | 982 | nufd = dupufd(sk->back->ufd); |
5afb0d14 | 983 | getsock(sk = nufd->sk->back); |
02a705ad FT |
984 | memcpy(nufd->d.s.remote = smalloc(addrlen), addr, nufd->d.s.remotelen = addrlen); |
985 | nufd->ignread = 1; | |
986 | return(sk); | |
d3372da9 | 987 | } |
988 | ||
cab0b442 | 989 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 990 | { |
991 | struct socket *sk; | |
992 | int mode; | |
993 | ||
994 | mode = confgetint("net", "mode"); | |
995 | if((mode == 0) || (mode == 1)) | |
996 | { | |
997 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
998 | return(NULL); | |
02a705ad FT |
999 | memcpy(sk->ufd->d.s.remote = smalloc(addrlen), addr, sk->ufd->d.s.remotelen = addrlen); |
1000 | sk->back->conncb = func; | |
1001 | sk->back->data = data; | |
1002 | if(!connect(sk->ufd->fd, addr, addrlen)) | |
d3372da9 | 1003 | { |
02a705ad FT |
1004 | sksetstate(sk, SOCK_EST); |
1005 | linksock(&cbatch, sk->back); | |
1006 | return(sk->back); | |
d3372da9 | 1007 | } |
1008 | if(errno == EINPROGRESS) | |
1009 | { | |
02a705ad FT |
1010 | sksetstate(sk, SOCK_SYN); |
1011 | return(sk->back); | |
d3372da9 | 1012 | } |
1013 | putsock(sk); | |
1014 | return(NULL); | |
1015 | } | |
1016 | errno = EOPNOTSUPP; | |
1017 | return(NULL); | |
1018 | } | |
1019 | ||
02a705ad | 1020 | static void acceptunix(struct ufd *ufd) |
9e5f2b29 | 1021 | { |
1022 | int buf; | |
1023 | ||
1024 | buf = 1; | |
a8c5ada6 | 1025 | #if UNIX_AUTH_STYLE == 1 |
02a705ad FT |
1026 | if(setsockopt(ufd->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
1027 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", ufd->fd, strerror(errno)); | |
a8c5ada6 | 1028 | #elif UNIX_AUTH_STYLE == 2 |
02a705ad | 1029 | if(getpeereid(ufd->fd, &ufd->d.s.ucred.uid, &ufd->d.s.ucred.gid) < 0) |
a8c5ada6 | 1030 | { |
02a705ad FT |
1031 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", ufd->fd, strerror(errno)); |
1032 | ufd->d.s.ucred.uid = -1; | |
1033 | ufd->d.s.ucred.gid = -1; | |
a8c5ada6 | 1034 | } |
1035 | #endif | |
9e5f2b29 | 1036 | } |
1037 | ||
f96d0914 FT |
1038 | static void runbatches(void) |
1039 | { | |
1040 | struct scons *sc, *nsc; | |
1041 | ||
1042 | for(sc = cbatch, cbatch = NULL; sc; sc = nsc) { | |
1043 | nsc = sc->n; | |
5afb0d14 FT |
1044 | if(sc->s->conncb != NULL) |
1045 | sc->s->conncb(sc->s, 0, sc->s->data); | |
834b0aa6 | 1046 | putsock(sc->s); |
f96d0914 FT |
1047 | free(sc); |
1048 | } | |
1049 | for(sc = rbatch, rbatch = NULL; sc; sc = nsc) { | |
1050 | nsc = sc->n; | |
5afb0d14 FT |
1051 | if(sc->s->readcb != NULL) |
1052 | sc->s->readcb(sc->s, sc->s->data); | |
1053 | if((sockgetdatalen(sc->s) == 0) && (sc->s->eos == 1)) { | |
1054 | if(sc->s->errcb != NULL) | |
1055 | sc->s->errcb(sc->s, 0, sc->s->data); | |
1056 | sc->s->eos = 2; | |
1057 | } | |
834b0aa6 | 1058 | putsock(sc->s); |
f96d0914 FT |
1059 | free(sc); |
1060 | } | |
1061 | for(sc = wbatch, wbatch = NULL; sc; sc = nsc) { | |
1062 | nsc = sc->n; | |
5afb0d14 FT |
1063 | if(sc->s->writecb != NULL) |
1064 | sc->s->writecb(sc->s, sc->s->data); | |
834b0aa6 | 1065 | putsock(sc->s); |
f96d0914 FT |
1066 | free(sc); |
1067 | } | |
1068 | } | |
1069 | ||
5afb0d14 FT |
1070 | static void cleansocks(void) |
1071 | { | |
1072 | struct ufd *ufd, *next; | |
1073 | ||
1074 | for(ufd = ufds; ufd != NULL; ufd = next) { | |
1075 | next = ufd->next; | |
834b0aa6 | 1076 | if(ufd->sk && ((ufd->fd < 0) || (sockgetdatalen(ufd->sk) == 0))) { |
5afb0d14 FT |
1077 | if(ufd->sk->eos == 1) { |
1078 | ufd->sk->eos = 2; | |
1079 | closeufd(ufd); | |
1080 | closesock(ufd->sk); | |
1081 | } | |
1082 | if((ufd->sk->refcount == 1) && (ufd->sk->back->refcount == 0)) { | |
1083 | freeufd(ufd); | |
1084 | continue; | |
1085 | } | |
1086 | } | |
1087 | } | |
1088 | } | |
1089 | ||
d3372da9 | 1090 | int pollsocks(int timeout) |
1091 | { | |
02a705ad | 1092 | int ret; |
eaa35963 | 1093 | socklen_t retlen; |
72a7835e FT |
1094 | int newfd, maxfd; |
1095 | fd_set rfds, wfds, efds; | |
5afb0d14 | 1096 | struct ufd *ufd, *nufd; |
02a705ad | 1097 | struct socket *nsk; |
d3372da9 | 1098 | struct sockaddr_storage ss; |
1099 | socklen_t sslen; | |
72a7835e | 1100 | struct timeval tv; |
d3372da9 | 1101 | |
5afb0d14 | 1102 | cleansocks(); |
72a7835e FT |
1103 | FD_ZERO(&rfds); |
1104 | FD_ZERO(&wfds); | |
1105 | FD_ZERO(&efds); | |
02a705ad FT |
1106 | for(maxfd = 0, ufd = ufds; ufd != NULL; ufd = ufd->next) { |
1107 | if(ufd->fd < 0) | |
d3372da9 | 1108 | continue; |
81286a22 | 1109 | if(!ufd->ignread && ((ufd->sk == NULL) || (sockqueueleft(ufd->sk) > 0))) |
02a705ad FT |
1110 | FD_SET(ufd->fd, &rfds); |
1111 | if(ufd->sk != NULL) { | |
1112 | if(sockgetdatalen(ufd->sk) > 0) | |
1113 | FD_SET(ufd->fd, &wfds); | |
1114 | else if(ufd->sk->state == SOCK_SYN) | |
1115 | FD_SET(ufd->fd, &wfds); | |
1116 | } | |
1117 | FD_SET(ufd->fd, &efds); | |
1118 | if(ufd->fd > maxfd) | |
1119 | maxfd = ufd->fd; | |
d3372da9 | 1120 | } |
5afb0d14 FT |
1121 | if(rbatch || wbatch || cbatch) |
1122 | timeout = 0; | |
72a7835e FT |
1123 | tv.tv_sec = timeout / 1000; |
1124 | tv.tv_usec = (timeout % 1000) * 1000; | |
1125 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
02a705ad FT |
1126 | if(ret < 0) { |
1127 | if(errno != EINTR) { | |
72a7835e | 1128 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 1129 | /* To avoid CPU hogging in case it's bad, which it |
1130 | * probably is. */ | |
1131 | sleep(1); | |
1132 | } | |
d3372da9 | 1133 | return(1); |
1134 | } | |
5afb0d14 | 1135 | for(ufd = ufds; ufd != NULL; ufd = ufd->next) { |
02a705ad FT |
1136 | if(ufd->sk < 0) |
1137 | continue; | |
1138 | if(ufd->type == UFD_LISTEN) { | |
1139 | if(FD_ISSET(ufd->fd, &rfds)) { | |
d3372da9 | 1140 | sslen = sizeof(ss); |
02a705ad FT |
1141 | if((newfd = accept(ufd->fd, (struct sockaddr *)&ss, &sslen)) < 0) { |
1142 | if(ufd->d.l.lp->errcb != NULL) | |
1143 | ufd->d.l.lp->errcb(ufd->d.l.lp, errno, ufd->d.l.lp->data); | |
cab0b442 | 1144 | } |
02a705ad FT |
1145 | nsk = sockpair(0); |
1146 | nufd = mkufd(newfd, UFD_SOCK, nsk); | |
1147 | nufd->d.s.family = ufd->d.l.family; | |
1148 | sksetstate(nsk, SOCK_EST); | |
1149 | memcpy(nufd->d.s.remote = smalloc(sslen), &ss, sslen); | |
1150 | nufd->d.s.remotelen = sslen; | |
9e5f2b29 | 1151 | if(ss.ss_family == PF_UNIX) |
02a705ad FT |
1152 | acceptunix(nufd); |
1153 | if(ufd->d.l.lp->acceptcb != NULL) | |
5afb0d14 | 1154 | ufd->d.l.lp->acceptcb(ufd->d.l.lp, nsk->back, ufd->d.l.lp->data); |
02a705ad | 1155 | putsock(nsk); |
d3372da9 | 1156 | } |
02a705ad | 1157 | if(FD_ISSET(ufd->fd, &efds)) { |
d3372da9 | 1158 | retlen = sizeof(ret); |
02a705ad FT |
1159 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
1160 | if(ufd->d.l.lp->errcb != NULL) | |
1161 | ufd->d.l.lp->errcb(ufd->d.l.lp, ret, ufd->d.l.lp->data); | |
d3372da9 | 1162 | continue; |
1163 | } | |
02a705ad FT |
1164 | } else { |
1165 | if(ufd->sk->state == SOCK_SYN) { | |
1166 | if(FD_ISSET(ufd->fd, &efds)) { | |
1167 | retlen = sizeof(ret); | |
1168 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1169 | if(ufd->sk->back->conncb != NULL) | |
1170 | ufd->sk->back->conncb(ufd->sk->back, ret, ufd->sk->back->data); | |
1171 | closeufd(ufd); | |
1172 | continue; | |
1173 | } | |
1174 | if(FD_ISSET(ufd->fd, &rfds) || FD_ISSET(ufd->fd, &wfds)) { | |
1175 | sksetstate(ufd->sk, SOCK_EST); | |
1176 | linksock(&cbatch, ufd->sk->back); | |
1177 | } | |
1178 | } else if(ufd->sk->state == SOCK_EST) { | |
1179 | if(FD_ISSET(ufd->fd, &efds)) { | |
1180 | retlen = sizeof(ret); | |
1181 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1182 | sockerror(ufd->sk, ret); | |
1183 | closeufd(ufd); | |
1184 | continue; | |
1185 | } | |
1186 | if(FD_ISSET(ufd->fd, &rfds)) | |
1187 | sockrecv(ufd); | |
5afb0d14 FT |
1188 | if(ufd->fd == -1) |
1189 | continue; | |
89d650f1 FT |
1190 | if(FD_ISSET(ufd->fd, &wfds)) { |
1191 | if(sockflush(ufd)) { | |
1192 | sockerror(ufd->sk, errno); | |
1193 | closeufd(ufd); | |
1194 | continue; | |
1195 | } | |
1196 | } | |
d3372da9 | 1197 | } |
d3372da9 | 1198 | } |
d3372da9 | 1199 | } |
f96d0914 | 1200 | runbatches(); |
5afb0d14 | 1201 | cleansocks(); |
d3372da9 | 1202 | return(1); |
1203 | } | |
1204 | ||
f96d0914 FT |
1205 | static struct ufd *getskufd(struct socket *sk) |
1206 | { | |
1207 | while(1) { | |
1208 | if(sk->back->ufd != NULL) | |
1209 | return(sk->back->ufd); | |
1210 | if((sk = sk->back->pnext) == NULL) | |
1211 | break; | |
1212 | } | |
1213 | return(NULL); | |
1214 | } | |
1215 | ||
d3372da9 | 1216 | int socksettos(struct socket *sk, int tos) |
1217 | { | |
b020fb3d | 1218 | int buf; |
f96d0914 | 1219 | struct ufd *ufd; |
b020fb3d | 1220 | |
f96d0914 FT |
1221 | ufd = getskufd(sk); |
1222 | if(ufd->type != UFD_SOCK) { | |
1223 | errno = EOPNOTSUPP; | |
1224 | return(-1); | |
1225 | } | |
1226 | if(ufd->d.s.family == AF_UNIX) | |
7ab36fbd | 1227 | return(0); /* Unix sockets are always perfect. :) */ |
f96d0914 | 1228 | if(ufd->d.s.family == AF_INET) |
d3372da9 | 1229 | { |
b020fb3d | 1230 | switch(tos) |
1231 | { | |
b198bed6 | 1232 | case 0: |
1233 | buf = 0; | |
1234 | break; | |
b020fb3d | 1235 | case SOCK_TOS_MINCOST: |
18c1ae1d | 1236 | buf = 0x02; |
b020fb3d | 1237 | break; |
1238 | case SOCK_TOS_MAXREL: | |
18c1ae1d | 1239 | buf = 0x04; |
b020fb3d | 1240 | break; |
1241 | case SOCK_TOS_MAXTP: | |
18c1ae1d | 1242 | buf = 0x08; |
b020fb3d | 1243 | break; |
1244 | case SOCK_TOS_MINDELAY: | |
18c1ae1d | 1245 | buf = 0x10; |
b020fb3d | 1246 | break; |
1247 | default: | |
1248 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1249 | return(-1); | |
1250 | } | |
f96d0914 | 1251 | if(setsockopt(ufd->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1252 | { |
1253 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1254 | return(-1); | |
1255 | } | |
1256 | return(0); | |
1257 | } | |
f96d0914 | 1258 | if(ufd->d.s.family == AF_INET6) |
b020fb3d | 1259 | { |
1260 | switch(tos) | |
1261 | { | |
b198bed6 | 1262 | case 0: |
1263 | buf = 0; | |
b020fb3d | 1264 | case SOCK_TOS_MINCOST: |
1265 | buf = confgetint("net", "diffserv-mincost"); | |
1266 | break; | |
1267 | case SOCK_TOS_MAXREL: | |
1268 | buf = confgetint("net", "diffserv-maxrel"); | |
1269 | break; | |
1270 | case SOCK_TOS_MAXTP: | |
1271 | buf = confgetint("net", "diffserv-maxtp"); | |
1272 | break; | |
1273 | case SOCK_TOS_MINDELAY: | |
1274 | buf = confgetint("net", "diffserv-mindelay"); | |
1275 | break; | |
1276 | default: | |
1277 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1278 | return(-1); | |
1279 | } | |
1280 | /* | |
1281 | On Linux, the API IPv6 flow label management doesn't seem to | |
1282 | be entirely complete, so I guess this will have to wait. | |
1283 | ||
1284 | if(setsockopt(...) < 0) | |
1285 | { | |
1286 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1287 | return(-1); | |
1288 | } | |
1289 | */ | |
1290 | return(0); | |
1291 | } | |
f96d0914 | 1292 | flog(LOG_WARNING, "could not set TOS on sock of family %i", ufd->d.s.family); |
d3372da9 | 1293 | return(1); |
1294 | } | |
1295 | ||
1296 | struct resolvedata | |
1297 | { | |
1298 | int fd; | |
1299 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1300 | void *data; | |
1301 | struct sockaddr_storage addr; | |
1302 | int addrlen; | |
1303 | }; | |
1304 | ||
1305 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1306 | { | |
1307 | static char buf[80]; | |
1308 | int ret; | |
1309 | struct sockaddr_in *ipv4; | |
1310 | ||
1311 | if(!status) | |
1312 | { | |
1313 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1314 | { | |
b4d16e90 | 1315 | errno = ENOENT; |
d3372da9 | 1316 | data->callback(NULL, 0, data->data); |
1317 | } else { | |
1318 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1319 | memcpy(&ipv4->sin_addr, buf, 4); | |
1320 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1321 | } | |
1322 | } else { | |
b4d16e90 | 1323 | errno = ENOENT; |
d3372da9 | 1324 | data->callback(NULL, 0, data->data); |
1325 | } | |
1326 | close(data->fd); | |
1327 | free(data); | |
1328 | } | |
1329 | ||
1330 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1331 | { | |
1332 | int i; | |
1333 | char *p; | |
1334 | int port; | |
1335 | int pfd[2]; | |
1336 | pid_t child; | |
1337 | struct resolvedata *rdata; | |
1338 | struct sockaddr_in ipv4; | |
1339 | struct hostent *he; | |
1340 | sigset_t sigset; | |
1341 | ||
1342 | /* IPv4 */ | |
1343 | port = -1; | |
1344 | if((p = strchr(addr, ':')) != NULL) | |
1345 | { | |
1346 | *p = 0; | |
1347 | port = atoi(p + 1); | |
1348 | } | |
1349 | ipv4.sin_family = AF_INET; | |
1350 | ipv4.sin_port = htons(port); | |
1351 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1352 | { | |
1353 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1354 | } else { | |
1355 | sigemptyset(&sigset); | |
1356 | sigaddset(&sigset, SIGCHLD); | |
1357 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1358 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1359 | { | |
1360 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1361 | return(-1); | |
1362 | } | |
1363 | if(child == 0) | |
1364 | { | |
1365 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1366 | for(i = 3; i < FD_SETSIZE; i++) | |
1367 | { | |
1368 | if(i != pfd[1]) | |
1369 | close(i); | |
1370 | } | |
1371 | signal(SIGALRM, SIG_DFL); | |
1372 | alarm(30); | |
1373 | if((he = gethostbyname(addr)) == NULL) | |
1374 | exit(1); | |
1375 | write(pfd[1], he->h_addr_list[0], 4); | |
1376 | exit(0); | |
1377 | } else { | |
1378 | close(pfd[1]); | |
1379 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1380 | rdata = smalloc(sizeof(*rdata)); | |
1381 | rdata->fd = pfd[0]; | |
1382 | rdata->callback = callback; | |
1383 | rdata->data = data; | |
1384 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1385 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1386 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1387 | return(1); | |
1388 | } | |
1389 | } | |
1390 | return(0); | |
1391 | } | |
1392 | ||
f96d0914 | 1393 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
d3372da9 | 1394 | { |
1395 | socklen_t len; | |
1396 | struct sockaddr_storage name; | |
1397 | ||
1398 | *namebuf = NULL; | |
f96d0914 | 1399 | if(fd < 0) |
d3372da9 | 1400 | return(-1); |
1401 | len = sizeof(name); | |
f96d0914 | 1402 | if(getsockname(fd, (struct sockaddr *)&name, &len) < 0) |
d3372da9 | 1403 | { |
6fb0c6ac | 1404 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1405 | return(-1); |
1406 | } | |
1407 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1408 | if(lenbuf != NULL) |
1409 | *lenbuf = len; | |
d3372da9 | 1410 | return(0); |
1411 | } | |
1412 | ||
f96d0914 FT |
1413 | int lstgetlocalname(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
1414 | { | |
1415 | struct ufd *ufd; | |
1416 | ||
1417 | ufd = lp->ufd; | |
1418 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1419 | } | |
1420 | ||
1421 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1422 | { | |
1423 | struct ufd *ufd; | |
1424 | ||
1425 | ufd = getskufd(sk); | |
1426 | if(ufd->type != UFD_SOCK) { | |
1427 | errno = EOPNOTSUPP; | |
1428 | return(-1); | |
1429 | } | |
1430 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1431 | } | |
1432 | ||
eaa35963 | 1433 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1434 | { | |
1435 | if(dst->sa_family != src->sa_family) | |
1436 | { | |
1437 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1438 | return; | |
1439 | } | |
1440 | switch(src->sa_family) | |
1441 | { | |
1442 | case AF_INET: | |
1443 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1444 | break; | |
1445 | case AF_INET6: | |
1446 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1447 | break; | |
1448 | default: | |
1449 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1450 | break; | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1455 | { |
6fb0c6ac | 1456 | int ret; |
eaa35963 | 1457 | socklen_t plen; |
1458 | struct sockaddr *pname; | |
1459 | ||
1460 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1461 | { | |
1462 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1463 | return(-1); | |
1464 | } | |
1465 | if(ret) | |
1466 | return(0); | |
1467 | sethostaddr(addr, pname); | |
1468 | free(pname); | |
1469 | return(0); | |
1470 | } | |
1471 | ||
f96d0914 | 1472 | static int getremotename(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
eaa35963 | 1473 | { |
d3372da9 | 1474 | socklen_t len; |
6fb0c6ac | 1475 | struct sockaddr *name; |
f96d0914 FT |
1476 | |
1477 | switch(confgetint("net", "mode")) { | |
d3372da9 | 1478 | case 0: |
1479 | *namebuf = NULL; | |
f96d0914 | 1480 | if(!getlocalname(fd, &name, &len)) { |
6fb0c6ac | 1481 | *namebuf = name; |
1482 | *lenbuf = len; | |
eaa35963 | 1483 | makepublic(name); |
6fb0c6ac | 1484 | return(0); |
1485 | } | |
1486 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1487 | return(-1); | |
d3372da9 | 1488 | case 1: |
1489 | errno = EOPNOTSUPP; | |
1490 | return(-1); | |
1491 | default: | |
1492 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1493 | errno = EOPNOTSUPP; | |
1494 | return(-1); | |
1495 | } | |
1496 | } | |
1497 | ||
f96d0914 FT |
1498 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1499 | { | |
1500 | struct ufd *ufd; | |
1501 | ||
1502 | ufd = getskufd(sk); | |
1503 | if(ufd->type != UFD_SOCK) { | |
1504 | errno = EOPNOTSUPP; | |
1505 | return(-1); | |
1506 | } | |
1507 | if(ufd->fd < 0) { | |
1508 | errno = EBADF; | |
1509 | return(-1); | |
1510 | } | |
1511 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1512 | } | |
1513 | ||
1514 | int lstgetremotename(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1515 | { | |
1516 | struct ufd *ufd; | |
1517 | ||
1518 | ufd = lp->ufd; | |
1519 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1520 | } | |
1521 | ||
d29853b1 | 1522 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1523 | { | |
1524 | struct sockaddr *name1, *name2; | |
1525 | socklen_t len1, len2; | |
f96d0914 FT |
1526 | struct ufd *ufd1, *ufd2; |
1527 | ||
1528 | ufd1 = getskufd(sk); | |
1529 | ufd2 = getskufd(sk2); | |
1530 | if((ufd1->type != UFD_SOCK) || (ufd2->type != UFD_SOCK)) { | |
1531 | errno = EOPNOTSUPP; | |
1532 | return(-1); | |
1533 | } | |
1534 | if(ufd1->d.s.family != ufd2->d.s.family) | |
1535 | { | |
1536 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); | |
1537 | return(-1); | |
1538 | } | |
1539 | if(getremotename(ufd1->fd, &name1, &len1)) | |
1540 | return(-1); | |
1541 | if(getremotename(ufd2->fd, &name2, &len2)) { | |
1542 | free(name1); | |
1543 | return(-1); | |
1544 | } | |
1545 | sethostaddr(name1, name2); | |
1546 | free(name2); | |
1547 | *namebuf = name1; | |
1548 | *lenbuf = len1; | |
1549 | return(0); | |
1550 | } | |
1551 | ||
1552 | int lstgetremotename2(struct lport *lp, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1553 | { | |
1554 | struct sockaddr *name1, *name2; | |
1555 | socklen_t len1, len2; | |
1556 | struct ufd *ufd1, *ufd2; | |
d29853b1 | 1557 | |
f96d0914 FT |
1558 | ufd1 = lp->ufd; |
1559 | ufd2 = getskufd(sk2); | |
1560 | if(ufd2->type != UFD_SOCK) { | |
1561 | errno = EOPNOTSUPP; | |
1562 | return(-1); | |
1563 | } | |
d334fbb5 | 1564 | if(ufd1->d.l.family != ufd2->d.s.family) |
d29853b1 | 1565 | { |
d334fbb5 | 1566 | flog(LOG_ERR, "using lstgetremotename2 with sockets of differing family: %i %i", ufd1->d.l.family, ufd2->d.s.family); |
d29853b1 | 1567 | return(-1); |
1568 | } | |
f96d0914 | 1569 | if(getremotename(ufd1->fd, &name1, &len1)) |
d29853b1 | 1570 | return(-1); |
f96d0914 | 1571 | if(getremotename(ufd2->fd, &name2, &len2)) { |
d29853b1 | 1572 | free(name1); |
1573 | return(-1); | |
1574 | } | |
1575 | sethostaddr(name1, name2); | |
1576 | free(name2); | |
1577 | *namebuf = name1; | |
1578 | *lenbuf = len1; | |
1579 | return(0); | |
1580 | } | |
1581 | ||
f96d0914 FT |
1582 | int getucred(struct socket *sk, uid_t *uid, gid_t *gid) |
1583 | { | |
1584 | struct ufd *ufd; | |
1585 | ||
1586 | ufd = getskufd(sk); | |
1587 | if(ufd->type != UFD_SOCK) { | |
1588 | errno = EOPNOTSUPP; | |
1589 | return(-1); | |
1590 | } | |
1591 | if(ufd->d.s.family != AF_UNIX) { | |
1592 | errno = EOPNOTSUPP; | |
1593 | return(-1); | |
1594 | } | |
1595 | *uid = ufd->d.s.ucred.uid; | |
1596 | *gid = ufd->d.s.ucred.gid; | |
1597 | return(0); | |
1598 | } | |
1599 | ||
81286a22 FT |
1600 | /* void sockblock(struct socket *sk, int block) */ |
1601 | /* { */ | |
1602 | /* struct ufd *ufd; */ | |
f96d0914 | 1603 | |
81286a22 FT |
1604 | /* ufd = getskufd(sk); */ |
1605 | /* ufd->ignread = block; */ | |
1606 | /* } */ | |
f96d0914 FT |
1607 | |
1608 | int sockfamily(struct socket *sk) | |
1609 | { | |
1610 | struct ufd *ufd; | |
1611 | ||
1612 | ufd = getskufd(sk); | |
1613 | if(ufd->type != UFD_SOCK) { | |
1614 | errno = EOPNOTSUPP; | |
1615 | return(-1); | |
1616 | } | |
1617 | return(ufd->d.s.family); | |
02a705ad FT |
1618 | } |
1619 | ||
1620 | int sockpeeraddr(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1621 | { | |
f96d0914 FT |
1622 | struct ufd *ufd; |
1623 | ||
1624 | ufd = getskufd(sk); | |
1625 | if(ufd->type != UFD_SOCK) { | |
1626 | errno = EOPNOTSUPP; | |
1627 | return(-1); | |
1628 | } | |
1629 | if(ufd->d.s.remote == NULL) | |
1630 | return(-1); | |
1631 | *namebuf = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, ufd->d.s.remotelen); | |
1632 | if(lenbuf != NULL) | |
1633 | *lenbuf = ufd->d.s.remotelen; | |
1634 | return(0); | |
02a705ad FT |
1635 | } |
1636 | ||
1637 | char *formatsockpeer(struct socket *sk) | |
1638 | { | |
1639 | struct sockaddr *name; | |
1640 | socklen_t nlen; | |
1641 | char *ret; | |
1642 | ||
1643 | if(sockpeeraddr(sk, &name, &nlen)) | |
1644 | return(NULL); | |
1645 | ret = formataddress(name, nlen); | |
1646 | free(name); | |
1647 | return(ret); | |
1648 | } | |
1649 | ||
99a28d47 | 1650 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1651 | { | |
1652 | struct sockaddr_un *u1, *u2; | |
1653 | struct sockaddr_in *n1, *n2; | |
1654 | #ifdef HAVE_IPV6 | |
1655 | struct sockaddr_in6 *s1, *s2; | |
1656 | #endif | |
1657 | ||
1658 | if(x->sa_family != y->sa_family) | |
1659 | return(0); | |
1660 | switch(x->sa_family) { | |
1661 | case AF_UNIX: | |
1662 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1663 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1664 | return(0); | |
1665 | break; | |
1666 | case AF_INET: | |
1667 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1668 | if(n1->sin_port != n2->sin_port) | |
1669 | return(0); | |
1670 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1671 | return(0); | |
1672 | break; | |
c8a729d7 | 1673 | #ifdef HAVE_IPV6 |
99a28d47 | 1674 | case AF_INET6: |
1675 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1676 | if(s1->sin6_port != s2->sin6_port) | |
1677 | return(0); | |
1678 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1679 | return(0); | |
1680 | break; | |
c8a729d7 | 1681 | #endif |
99a28d47 | 1682 | } |
1683 | return(1); | |
1684 | } | |
1685 | ||
d3372da9 | 1686 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1687 | { | |
d3372da9 | 1688 | struct sockaddr_in *ipv4; |
1689 | #ifdef HAVE_IPV6 | |
1690 | struct sockaddr_in6 *ipv6; | |
1691 | #endif | |
1692 | static char *ret = NULL; | |
1693 | char buf[1024]; | |
1694 | ||
1695 | if(ret != NULL) | |
1696 | free(ret); | |
1697 | ret = NULL; | |
1698 | switch(arg->sa_family) | |
1699 | { | |
1700 | case AF_UNIX: | |
6a97462e | 1701 | ret = sstrdup("Unix socket"); |
d3372da9 | 1702 | break; |
1703 | case AF_INET: | |
1704 | ipv4 = (struct sockaddr_in *)arg; | |
1705 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1706 | return(NULL); | |
1707 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1708 | break; | |
1709 | #ifdef HAVE_IPV6 | |
1710 | case AF_INET6: | |
1711 | ipv6 = (struct sockaddr_in6 *)arg; | |
1712 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1713 | return(NULL); | |
fc7f7735 | 1714 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1715 | break; |
1716 | #endif | |
1717 | default: | |
1718 | errno = EPFNOSUPPORT; | |
1719 | break; | |
1720 | } | |
1721 | return(ret); | |
1722 | } | |
1723 | ||
1724 | #if 0 | |
1725 | ||
1726 | /* | |
1727 | * It was very nice to use this, but it seems | |
1728 | * to mess things up, so I guess it has to go... :-( | |
1729 | */ | |
1730 | ||
1731 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1732 | { | |
1733 | struct sockaddr *arg; | |
1734 | socklen_t arglen; | |
1735 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1736 | * lowercase letters to 1, so I do this | |
1737 | * instead. */ | |
1738 | struct sockaddr_in *ipv4; | |
1739 | int ret; | |
1740 | ||
1741 | arg = *(struct sockaddr **)(args[0]); | |
1742 | arglen = *(socklen_t *)(args[1]); | |
1743 | switch(arg->sa_family) | |
1744 | { | |
1745 | case AF_UNIX: | |
1746 | UNIX = (struct sockaddr_un *)arg; | |
1747 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1748 | break; | |
1749 | case AF_INET: | |
1750 | ipv4 = (struct sockaddr_in *)arg; | |
1751 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1752 | break; | |
1753 | default: | |
1754 | ret = -1; | |
1755 | errno = EPFNOSUPPORT; | |
1756 | break; | |
1757 | } | |
1758 | return(ret); | |
1759 | } | |
1760 | ||
1761 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1762 | { | |
1763 | if(n > 0) | |
1764 | argtypes[0] = PA_POINTER; | |
1765 | if(n > 1) | |
1766 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1767 | * be an int, so I guess this should be | |
1768 | * safe. */ | |
1769 | return(2); | |
1770 | } | |
1771 | #endif | |
1772 | ||
1773 | static int init(int hup) | |
1774 | { | |
1775 | if(!hup) | |
1776 | { | |
1777 | /* | |
1778 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1779 | { | |
1780 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1781 | return(1); | |
1782 | } | |
1783 | */ | |
1784 | } | |
1785 | return(0); | |
1786 | } | |
1787 | ||
1788 | static void terminate(void) | |
1789 | { | |
f96d0914 FT |
1790 | /* |
1791 | while(ufds != NULL) | |
1792 | freeufd(ufds); | |
1793 | */ | |
d3372da9 | 1794 | } |
1795 | ||
1796 | static struct module me = | |
1797 | { | |
1798 | .name = "net", | |
1799 | .conf = | |
1800 | { | |
1801 | .vars = myvars | |
1802 | }, | |
1803 | .init = init, | |
1804 | .terminate = terminate | |
1805 | }; | |
1806 | ||
1807 | MODULE(me) |