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 |
f966ec56 FT |
87 | * to the left (across the ECN bits). This may only work on |
88 | * Linux. */ | |
89 | {CONF_VAR_BOOL, "dscp-tos", {.num = 0}}, | |
d3372da9 | 90 | {CONF_VAR_END} |
91 | }; | |
92 | ||
93 | static struct socket *sockets = NULL; | |
94 | int numsocks = 0; | |
95 | ||
96 | /* XXX: Get autoconf for all this... */ | |
97 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) | |
98 | { | |
99 | struct sockaddr_in *ipv4; | |
100 | struct configvar *var; | |
101 | void *bufend; | |
102 | int sock; | |
103 | struct ifconf conf; | |
104 | struct ifreq *ifr, req; | |
105 | char *pif; | |
106 | ||
107 | if(af == AF_INET) | |
108 | { | |
109 | var = confgetvar("net", "visibleipv4"); | |
110 | if(var->val.ipv4.s_addr != 0) | |
111 | { | |
112 | ipv4 = smalloc(sizeof(*ipv4)); | |
113 | ipv4->sin_family = AF_INET; | |
114 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; | |
115 | *addr = (struct sockaddr *)ipv4; | |
116 | *lenbuf = sizeof(*ipv4); | |
117 | return(0); | |
118 | } | |
bcb73bb3 | 119 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 | 120 | { |
121 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); | |
122 | return(-1); | |
123 | } | |
6fb0c6ac | 124 | if(!strcmp(pif, "")) |
125 | return(1); | |
d3372da9 | 126 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
127 | return(-1); | |
128 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); | |
129 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
130 | { | |
131 | free(conf.ifc_buf); | |
132 | close(sock); | |
133 | return(-1); | |
134 | } | |
135 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; | |
136 | ipv4 = NULL; | |
137 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) | |
138 | { | |
1315d02a | 139 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac | 140 | continue; |
d3372da9 | 141 | memset(&req, 0, sizeof(req)); |
142 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); | |
143 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) | |
6fb0c6ac | 144 | break; |
145 | if(!(req.ifr_flags & IFF_UP)) | |
d3372da9 | 146 | { |
6fb0c6ac | 147 | flog(LOG_WARNING, "public interface is down"); |
148 | break; | |
d3372da9 | 149 | } |
6fb0c6ac | 150 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 | 151 | { |
6fb0c6ac | 152 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
153 | break; | |
d3372da9 | 154 | } |
6fb0c6ac | 155 | ipv4 = smalloc(sizeof(*ipv4)); |
156 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); | |
157 | break; | |
d3372da9 | 158 | } |
bcb73bb3 | 159 | free(conf.ifc_buf); |
d3372da9 | 160 | close(sock); |
161 | if(ipv4 != NULL) | |
162 | { | |
163 | *addr = (struct sockaddr *)ipv4; | |
164 | *lenbuf = sizeof(*ipv4); | |
165 | return(0); | |
166 | } | |
167 | errno = ENETDOWN; | |
168 | return(-1); | |
169 | } | |
6fb0c6ac | 170 | return(1); |
d3372da9 | 171 | } |
172 | ||
173 | static struct socket *newsock(int type) | |
174 | { | |
175 | struct socket *new; | |
176 | ||
177 | new = smalloc(sizeof(*new)); | |
c7ff7e93 | 178 | memset(new, 0, sizeof(*new)); |
d3372da9 | 179 | new->refcount = 2; |
180 | new->fd = -1; | |
181 | new->isrealsocket = 1; | |
182 | new->family = -1; | |
183 | new->tos = 0; | |
184 | new->type = type; | |
185 | new->state = -1; | |
186 | new->ignread = 0; | |
187 | new->close = 0; | |
188 | new->remote = NULL; | |
189 | new->remotelen = 0; | |
a8c5ada6 | 190 | new->ucred.uid = -1; |
191 | new->ucred.gid = -1; | |
d3372da9 | 192 | switch(type) |
193 | { | |
194 | case SOCK_STREAM: | |
195 | new->outbuf.s.buf = NULL; | |
196 | new->outbuf.s.bufsize = 0; | |
197 | new->outbuf.s.datasize = 0; | |
198 | new->inbuf.s.buf = NULL; | |
199 | new->inbuf.s.bufsize = 0; | |
200 | new->inbuf.s.datasize = 0; | |
201 | break; | |
202 | case SOCK_DGRAM: | |
203 | new->outbuf.d.f = new->outbuf.d.l = NULL; | |
204 | new->inbuf.d.f = new->inbuf.d.l = NULL; | |
205 | break; | |
206 | } | |
cab0b442 | 207 | new->conncb = NULL; |
208 | new->errcb = NULL; | |
209 | new->readcb = NULL; | |
210 | new->writecb = NULL; | |
211 | new->acceptcb = NULL; | |
d3372da9 | 212 | new->next = sockets; |
213 | new->prev = NULL; | |
214 | if(sockets != NULL) | |
215 | sockets->prev = new; | |
216 | sockets = new; | |
217 | numsocks++; | |
218 | return(new); | |
219 | } | |
220 | ||
221 | static struct socket *mksock(int domain, int type) | |
222 | { | |
223 | int fd; | |
224 | struct socket *new; | |
225 | ||
226 | if((fd = socket(domain, type, 0)) < 0) | |
227 | { | |
228 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
229 | return(NULL); | |
230 | } | |
231 | new = newsock(type); | |
232 | new->fd = fd; | |
233 | new->family = domain; | |
234 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); | |
235 | return(new); | |
236 | } | |
237 | ||
238 | struct socket *wrapsock(int fd) | |
239 | { | |
240 | struct socket *new; | |
241 | ||
242 | new = newsock(SOCK_STREAM); | |
243 | new->fd = fd; | |
244 | new->state = SOCK_EST; | |
245 | new->isrealsocket = 0; | |
246 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); | |
247 | return(new); | |
248 | } | |
249 | ||
250 | static void unlinksock(struct socket *sk) | |
251 | { | |
252 | if(sk->prev != NULL) | |
253 | sk->prev->next = sk->next; | |
254 | if(sk->next != NULL) | |
255 | sk->next->prev = sk->prev; | |
256 | if(sk == sockets) | |
257 | sockets = sk->next; | |
258 | putsock(sk); | |
259 | numsocks--; | |
260 | } | |
261 | ||
262 | void getsock(struct socket *sk) | |
263 | { | |
264 | sk->refcount++; | |
265 | } | |
266 | ||
267 | void putsock(struct socket *sk) | |
268 | { | |
269 | struct dgrambuf *buf; | |
270 | ||
271 | if(--(sk->refcount) == 0) | |
272 | { | |
273 | switch(sk->type) | |
274 | { | |
275 | case SOCK_STREAM: | |
276 | if(sk->outbuf.s.buf != NULL) | |
277 | free(sk->outbuf.s.buf); | |
278 | if(sk->inbuf.s.buf != NULL) | |
279 | free(sk->inbuf.s.buf); | |
280 | break; | |
281 | case SOCK_DGRAM: | |
282 | while((buf = sk->outbuf.d.f) != NULL) | |
283 | { | |
284 | sk->outbuf.d.f = buf->next; | |
285 | free(buf->data); | |
161604ea | 286 | free(buf->addr); |
d3372da9 | 287 | free(buf); |
288 | } | |
289 | while((buf = sk->inbuf.d.f) != NULL) | |
290 | { | |
291 | sk->inbuf.d.f = buf->next; | |
292 | free(buf->data); | |
161604ea | 293 | free(buf->addr); |
d3372da9 | 294 | free(buf); |
295 | } | |
296 | break; | |
297 | } | |
b870805e | 298 | closesock(sk); |
d3372da9 | 299 | if(sk->remote != NULL) |
300 | free(sk->remote); | |
301 | free(sk); | |
302 | } | |
303 | } | |
304 | ||
336539c2 | 305 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
306 | { | |
307 | switch(sk->type) | |
308 | { | |
309 | case SOCK_STREAM: | |
310 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1); | |
311 | memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize); | |
312 | memcpy(sk->inbuf.s.buf, buf, size); | |
313 | sk->inbuf.s.datasize += size; | |
314 | break; | |
315 | case SOCK_DGRAM: | |
316 | /* XXX */ | |
317 | break; | |
318 | } | |
319 | return; | |
320 | } | |
321 | ||
d3372da9 | 322 | void *sockgetinbuf(struct socket *sk, size_t *size) |
323 | { | |
324 | void *buf; | |
325 | struct dgrambuf *dbuf; | |
326 | ||
327 | switch(sk->type) | |
328 | { | |
329 | case SOCK_STREAM: | |
330 | if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0)) | |
331 | { | |
332 | *size = 0; | |
333 | return(NULL); | |
334 | } | |
335 | buf = sk->inbuf.s.buf; | |
336 | *size = sk->inbuf.s.datasize; | |
337 | sk->inbuf.s.buf = NULL; | |
338 | sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0; | |
339 | return(buf); | |
340 | case SOCK_DGRAM: | |
341 | if((dbuf = sk->inbuf.d.f) == NULL) | |
342 | return(NULL); | |
343 | sk->inbuf.d.f = dbuf->next; | |
344 | if(dbuf->next == NULL) | |
345 | sk->inbuf.d.l = NULL; | |
346 | buf = dbuf->data; | |
347 | *size = dbuf->size; | |
348 | free(dbuf->addr); | |
349 | free(dbuf); | |
350 | return(buf); | |
351 | } | |
352 | return(NULL); | |
353 | } | |
354 | ||
9e5f2b29 | 355 | static void recvcmsg(struct socket *sk, struct msghdr *msg) |
356 | { | |
357 | struct cmsghdr *cmsg; | |
9e5f2b29 | 358 | |
359 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
360 | { | |
a8c5ada6 | 361 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 362 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
363 | { | |
a8c5ada6 | 364 | struct ucred *cred; |
365 | if(sk->ucred.uid == -1) | |
9e5f2b29 | 366 | { |
367 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
a8c5ada6 | 368 | sk->ucred.uid = cred->uid; |
369 | sk->ucred.gid = cred->gid; | |
9e5f2b29 | 370 | } |
371 | } | |
a8c5ada6 | 372 | #endif |
9e5f2b29 | 373 | } |
374 | } | |
375 | ||
d3372da9 | 376 | static void sockrecv(struct socket *sk) |
377 | { | |
378 | int ret, inq; | |
379 | struct dgrambuf *dbuf; | |
9e5f2b29 | 380 | struct msghdr msg; |
381 | char cbuf[65536]; | |
382 | struct iovec bufvec; | |
d3372da9 | 383 | |
9e5f2b29 | 384 | memset(&msg, 0, sizeof(msg)); |
385 | msg.msg_iov = &bufvec; | |
386 | msg.msg_iovlen = 1; | |
387 | msg.msg_control = cbuf; | |
388 | msg.msg_controllen = sizeof(cbuf); | |
d3372da9 | 389 | switch(sk->type) |
390 | { | |
391 | case SOCK_STREAM: | |
392 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
393 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
394 | * how to read the inqueue size on other OSs */ | |
dcf7a1a2 FT |
395 | if(sk->isrealsocket) { |
396 | if(ioctl(sk->fd, SIOCINQ, &inq)) | |
397 | { | |
398 | /* I don't really know what could go wrong here, so let's | |
399 | * assume it's transient. */ | |
400 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd); | |
401 | inq = 2048; | |
402 | } | |
403 | } else { | |
404 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
405 | inq = 65536; | |
d3372da9 | 406 | } |
407 | #else | |
408 | inq = 2048; | |
409 | #endif | |
410 | if(inq > 65536) | |
411 | inq = 65536; | |
412 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1); | |
987518f8 | 413 | if(sk->isrealsocket) |
414 | { | |
415 | bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize; | |
416 | bufvec.iov_len = inq; | |
417 | ret = recvmsg(sk->fd, &msg, 0); | |
418 | } else { | |
419 | ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq); | |
420 | msg.msg_controllen = 0; | |
421 | msg.msg_flags = 0; | |
422 | } | |
d3372da9 | 423 | if(ret < 0) |
424 | { | |
425 | if((errno == EINTR) || (errno == EAGAIN)) | |
426 | return; | |
cab0b442 | 427 | if(sk->errcb != NULL) |
428 | sk->errcb(sk, errno, sk->data); | |
d3372da9 | 429 | closesock(sk); |
430 | return; | |
431 | } | |
9e5f2b29 | 432 | if(msg.msg_flags & MSG_CTRUNC) |
433 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
434 | else | |
435 | recvcmsg(sk, &msg); | |
d3372da9 | 436 | if(ret == 0) |
437 | { | |
cab0b442 | 438 | if(sk->errcb != NULL) |
439 | sk->errcb(sk, 0, sk->data); | |
d3372da9 | 440 | closesock(sk); |
441 | return; | |
442 | } | |
443 | sk->inbuf.s.datasize += ret; | |
cab0b442 | 444 | if(sk->readcb != NULL) |
445 | sk->readcb(sk, sk->data); | |
d3372da9 | 446 | break; |
447 | case SOCK_DGRAM: | |
9e5f2b29 | 448 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
d3372da9 | 449 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
450 | { | |
451 | /* I don't really know what could go wrong here, so let's | |
452 | * assume it's transient. */ | |
453 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd); | |
454 | return; | |
455 | } | |
9e5f2b29 | 456 | #else |
457 | inq = 65536; | |
458 | #endif | |
d3372da9 | 459 | dbuf = smalloc(sizeof(*dbuf)); |
460 | dbuf->data = smalloc(inq); | |
461 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 462 | /* |
d3372da9 | 463 | ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen); |
9e5f2b29 | 464 | */ |
465 | msg.msg_name = dbuf->addr; | |
466 | msg.msg_namelen = dbuf->addrlen; | |
467 | bufvec.iov_base = dbuf->data; | |
468 | bufvec.iov_len = inq; | |
469 | ret = recvmsg(sk->fd, &msg, 0); | |
470 | dbuf->addrlen = msg.msg_namelen; | |
d3372da9 | 471 | if(ret < 0) |
472 | { | |
473 | free(dbuf->addr); | |
474 | free(dbuf->data); | |
475 | free(dbuf); | |
476 | if((errno == EINTR) || (errno == EAGAIN)) | |
477 | return; | |
cab0b442 | 478 | if(sk->errcb != NULL) |
479 | sk->errcb(sk, errno, sk->data); | |
d3372da9 | 480 | closesock(sk); |
481 | return; | |
482 | } | |
9e5f2b29 | 483 | if(msg.msg_flags & MSG_CTRUNC) |
484 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
485 | else | |
486 | recvcmsg(sk, &msg); | |
d3372da9 | 487 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
488 | * have EOF), but rather an empty packet. I don't know if any | |
489 | * other potential DGRAM protocols might have an EOF | |
490 | * condition, so let's play safe. */ | |
491 | if(ret == 0) | |
492 | { | |
493 | free(dbuf->addr); | |
494 | free(dbuf->data); | |
495 | free(dbuf); | |
496 | if(!((sk->family == AF_INET) || (sk->family == AF_INET6))) | |
497 | { | |
cab0b442 | 498 | if(sk->errcb != NULL) |
499 | sk->errcb(sk, 0, sk->data); | |
d3372da9 | 500 | closesock(sk); |
501 | } | |
502 | return; | |
503 | } | |
504 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
505 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
506 | dbuf->next = NULL; | |
507 | if(sk->inbuf.d.l != NULL) | |
508 | sk->inbuf.d.l->next = dbuf; | |
509 | else | |
510 | sk->inbuf.d.f = dbuf; | |
511 | sk->inbuf.d.l = dbuf; | |
cab0b442 | 512 | if(sk->readcb != NULL) |
513 | sk->readcb(sk, sk->data); | |
d3372da9 | 514 | break; |
515 | } | |
516 | } | |
517 | ||
518 | static void sockflush(struct socket *sk) | |
519 | { | |
520 | int ret; | |
521 | struct dgrambuf *dbuf; | |
522 | ||
523 | switch(sk->type) | |
524 | { | |
525 | case SOCK_STREAM: | |
526 | if(sk->isrealsocket) | |
527 | ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
528 | else | |
529 | ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize); | |
530 | if(ret < 0) | |
531 | { | |
c7ff7e93 FT |
532 | if((errno != EINTR) && (errno != EAGAIN)) |
533 | { | |
534 | if(sk->errcb != NULL) | |
535 | sk->errcb(sk, errno, sk->data); | |
536 | closesock(sk); | |
537 | } | |
d3372da9 | 538 | break; |
539 | } | |
540 | if(ret > 0) | |
541 | { | |
542 | memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret); | |
cab0b442 | 543 | if(sk->writecb != NULL) |
544 | sk->writecb(sk, sk->data); | |
d3372da9 | 545 | } |
546 | break; | |
547 | case SOCK_DGRAM: | |
548 | dbuf = sk->outbuf.d.f; | |
549 | if((sk->outbuf.d.f = dbuf->next) == NULL) | |
550 | sk->outbuf.d.l = NULL; | |
551 | sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
552 | free(dbuf->data); | |
553 | free(dbuf->addr); | |
554 | free(dbuf); | |
cab0b442 | 555 | if(sk->writecb != NULL) |
556 | sk->writecb(sk, sk->data); | |
d3372da9 | 557 | break; |
558 | } | |
559 | } | |
560 | ||
561 | void closesock(struct socket *sk) | |
562 | { | |
b870805e | 563 | struct sockaddr_un *un; |
564 | ||
e0cbc756 | 565 | if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX)) |
b870805e | 566 | { |
7ab36fbd | 567 | if((sk->state == SOCK_LST) && strchr(un->sun_path, '/')) |
b870805e | 568 | { |
569 | if(unlink(un->sun_path)) | |
7ab36fbd | 570 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); |
b870805e | 571 | } |
572 | } | |
d3372da9 | 573 | sk->state = SOCK_STL; |
574 | close(sk->fd); | |
575 | sk->fd = -1; | |
576 | sk->close = 0; | |
577 | } | |
578 | ||
579 | void sockqueue(struct socket *sk, void *data, size_t size) | |
580 | { | |
581 | struct dgrambuf *new; | |
582 | ||
583 | if(sk->state == SOCK_STL) | |
584 | return; | |
585 | switch(sk->type) | |
586 | { | |
587 | case SOCK_STREAM: | |
588 | sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1); | |
589 | memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size); | |
590 | sk->outbuf.s.datasize += size; | |
591 | break; | |
592 | case SOCK_DGRAM: | |
593 | if(sk->remote == NULL) | |
594 | return; | |
595 | new = smalloc(sizeof(*new)); | |
596 | new->next = NULL; | |
597 | memcpy(new->data = smalloc(size), data, new->size = size); | |
598 | memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen); | |
599 | if(sk->outbuf.d.l == NULL) | |
600 | { | |
601 | sk->outbuf.d.l = sk->outbuf.d.f = new; | |
602 | } else { | |
603 | sk->outbuf.d.l->next = new; | |
604 | sk->outbuf.d.l = new; | |
605 | } | |
606 | break; | |
607 | } | |
608 | } | |
609 | ||
610 | size_t sockgetdatalen(struct socket *sk) | |
611 | { | |
612 | struct dgrambuf *b; | |
613 | size_t ret; | |
614 | ||
615 | switch(sk->type) | |
616 | { | |
617 | case SOCK_STREAM: | |
618 | ret = sk->inbuf.s.datasize; | |
619 | break; | |
620 | case SOCK_DGRAM: | |
621 | ret = 0; | |
622 | for(b = sk->inbuf.d.f; b != NULL; b = b->next) | |
623 | ret += b->size; | |
624 | break; | |
625 | } | |
626 | return(ret); | |
627 | } | |
628 | ||
629 | size_t sockqueuesize(struct socket *sk) | |
630 | { | |
631 | struct dgrambuf *b; | |
632 | size_t ret; | |
633 | ||
634 | switch(sk->type) | |
635 | { | |
636 | case SOCK_STREAM: | |
637 | ret = sk->outbuf.s.datasize; | |
638 | break; | |
639 | case SOCK_DGRAM: | |
640 | ret = 0; | |
641 | for(b = sk->outbuf.d.f; b != NULL; b = b->next) | |
642 | ret += b->size; | |
643 | break; | |
644 | } | |
645 | return(ret); | |
646 | } | |
647 | ||
d3372da9 | 648 | /* |
7ab36fbd | 649 | * Seriously, I don't know if it's naughty or not to remove |
650 | * pre-existing Unix sockets. | |
651 | */ | |
652 | static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen) | |
653 | { | |
654 | struct sockaddr_un *un; | |
655 | struct stat sb; | |
656 | ||
657 | if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX)) | |
658 | return(-1); | |
659 | un = (struct sockaddr_un *)name; | |
660 | if(stat(un->sun_path, &sb)) | |
661 | return(-1); | |
662 | if(!S_ISSOCK(sb.st_mode)) | |
663 | return(-1); | |
664 | if(unlink(un->sun_path)) | |
665 | return(-1); | |
666 | if(bind(sk->fd, name, namelen) < 0) | |
667 | return(-1); | |
668 | return(0); | |
669 | } | |
670 | ||
671 | /* | |
d3372da9 | 672 | * The difference between netcslisten() and netcslistenlocal() is that |
673 | * netcslistenlocal() always listens on the local host, instead of | |
674 | * following proxy/passive mode directions. It is suitable for eg. the | |
675 | * UI channel, while the file sharing networks should, naturally, use | |
676 | * netcslisten() instead. | |
677 | */ | |
678 | ||
cab0b442 | 679 | struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
d3372da9 | 680 | { |
681 | struct socket *sk; | |
66c517d2 | 682 | int intbuf; |
d3372da9 | 683 | |
684 | /* I don't know if this is actually correct (it probably isn't), | |
685 | * but since, at on least Linux systems, PF_* are specifically | |
686 | * #define'd to their AF_* counterparts, it allows for a severely | |
687 | * smoother implementation. If it breaks something on your | |
688 | * platform, please tell me so. | |
689 | */ | |
690 | if((sk = mksock(name->sa_family, type)) == NULL) | |
691 | return(NULL); | |
692 | sk->state = SOCK_LST; | |
687b2ee2 | 693 | if(confgetint("net", "reuseaddr")) |
694 | { | |
695 | intbuf = 1; | |
696 | setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); | |
697 | } | |
7ab36fbd | 698 | if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0))) |
d3372da9 | 699 | { |
700 | putsock(sk); | |
701 | return(NULL); | |
702 | } | |
703 | if(listen(sk->fd, 16) < 0) | |
704 | { | |
705 | putsock(sk); | |
706 | return(NULL); | |
707 | } | |
cab0b442 | 708 | sk->acceptcb = func; |
709 | sk->data = data; | |
d3372da9 | 710 | return(sk); |
711 | } | |
712 | ||
cab0b442 | 713 | struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
c23acc61 | 714 | { |
715 | if(confgetint("net", "mode") == 1) | |
716 | { | |
717 | errno = EOPNOTSUPP; | |
718 | return(NULL); | |
719 | } | |
c23acc61 | 720 | if(confgetint("net", "mode") == 0) |
721 | return(netcslistenlocal(type, name, namelen, func, data)); | |
722 | errno = EOPNOTSUPP; | |
723 | return(NULL); | |
724 | } | |
725 | ||
cab0b442 | 726 | struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data) |
0a1bc5b1 | 727 | { |
728 | struct sockaddr_in addr; | |
729 | #ifdef HAVE_IPV6 | |
730 | struct sockaddr_in6 addr6; | |
731 | #endif | |
cab0b442 | 732 | struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *); |
0a1bc5b1 | 733 | struct socket *ret; |
734 | ||
735 | if(local) | |
736 | csfunc = netcslistenlocal; | |
737 | else | |
738 | csfunc = netcslisten; | |
739 | #ifdef HAVE_IPV6 | |
740 | memset(&addr6, 0, sizeof(addr6)); | |
741 | addr6.sin6_family = AF_INET6; | |
742 | addr6.sin6_port = htons(port); | |
743 | addr6.sin6_addr = in6addr_any; | |
744 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
745 | return(ret); | |
746 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
747 | return(NULL); | |
748 | #endif | |
749 | memset(&addr, 0, sizeof(addr)); | |
750 | addr.sin_family = AF_INET; | |
751 | addr.sin_port = htons(port); | |
752 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
753 | } | |
754 | ||
d3372da9 | 755 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
756 | { | |
757 | struct socket *sk; | |
758 | int mode; | |
759 | ||
760 | mode = confgetint("net", "mode"); | |
761 | if((mode == 0) || (mode == 1)) | |
762 | { | |
763 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
764 | return(NULL); | |
765 | if(bind(sk->fd, name, namelen) < 0) | |
766 | { | |
767 | putsock(sk); | |
768 | return(NULL); | |
769 | } | |
770 | sk->state = SOCK_EST; | |
771 | return(sk); | |
772 | } | |
773 | errno = EOPNOTSUPP; | |
774 | return(NULL); | |
775 | } | |
776 | ||
777 | struct socket *netdupsock(struct socket *sk) | |
778 | { | |
779 | struct socket *newsk; | |
780 | ||
781 | newsk = newsock(sk->type); | |
782 | if((newsk->fd = dup(sk->fd)) < 0) | |
783 | { | |
784 | flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno)); | |
785 | putsock(newsk); | |
786 | return(NULL); | |
787 | } | |
788 | newsk->state = sk->state; | |
789 | newsk->ignread = sk->ignread; | |
790 | if(sk->remote != NULL) | |
791 | memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen); | |
792 | return(newsk); | |
793 | } | |
794 | ||
795 | void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) | |
796 | { | |
797 | if(sk->remote != NULL) | |
798 | free(sk->remote); | |
799 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); | |
800 | sk->ignread = 1; | |
801 | } | |
802 | ||
cab0b442 | 803 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 804 | { |
805 | struct socket *sk; | |
806 | int mode; | |
807 | ||
808 | mode = confgetint("net", "mode"); | |
809 | if((mode == 0) || (mode == 1)) | |
810 | { | |
811 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
812 | return(NULL); | |
813 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); | |
814 | if(!connect(sk->fd, addr, addrlen)) | |
815 | { | |
816 | sk->state = SOCK_EST; | |
817 | func(sk, 0, data); | |
818 | return(sk); | |
819 | } | |
820 | if(errno == EINPROGRESS) | |
821 | { | |
822 | sk->state = SOCK_SYN; | |
cab0b442 | 823 | sk->conncb = func; |
824 | sk->data = data; | |
d3372da9 | 825 | return(sk); |
826 | } | |
827 | putsock(sk); | |
828 | return(NULL); | |
829 | } | |
830 | errno = EOPNOTSUPP; | |
831 | return(NULL); | |
832 | } | |
833 | ||
9e5f2b29 | 834 | static void acceptunix(struct socket *sk) |
835 | { | |
836 | int buf; | |
837 | ||
838 | buf = 1; | |
a8c5ada6 | 839 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 840 | if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
841 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno)); | |
a8c5ada6 | 842 | #elif UNIX_AUTH_STYLE == 2 |
843 | if(getpeereid(sk->fd, &sk->ucred.uid, &sk->ucred.gid) < 0) | |
844 | { | |
845 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", sk->fd, strerror(errno)); | |
846 | sk->ucred.uid = -1; | |
847 | sk->ucred.gid = -1; | |
848 | } | |
849 | #endif | |
9e5f2b29 | 850 | } |
851 | ||
d3372da9 | 852 | int pollsocks(int timeout) |
853 | { | |
72a7835e | 854 | int ret, fd; |
eaa35963 | 855 | socklen_t retlen; |
72a7835e FT |
856 | int newfd, maxfd; |
857 | fd_set rfds, wfds, efds; | |
d3372da9 | 858 | struct socket *sk, *next, *newsk; |
859 | struct sockaddr_storage ss; | |
860 | socklen_t sslen; | |
72a7835e | 861 | struct timeval tv; |
d3372da9 | 862 | |
72a7835e FT |
863 | FD_ZERO(&rfds); |
864 | FD_ZERO(&wfds); | |
865 | FD_ZERO(&efds); | |
866 | for(maxfd = 0, sk = sockets; sk != NULL; sk = sk->next) | |
d3372da9 | 867 | { |
72a7835e | 868 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
d3372da9 | 869 | continue; |
d3372da9 | 870 | if(!sk->ignread) |
72a7835e | 871 | FD_SET(sk->fd, &rfds); |
d3372da9 | 872 | if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0)) |
72a7835e FT |
873 | FD_SET(sk->fd, &wfds); |
874 | FD_SET(sk->fd, &efds); | |
875 | if(sk->fd > maxfd) | |
876 | maxfd = sk->fd; | |
d3372da9 | 877 | } |
72a7835e FT |
878 | tv.tv_sec = timeout / 1000; |
879 | tv.tv_usec = (timeout % 1000) * 1000; | |
880 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
d3372da9 | 881 | if(ret < 0) |
882 | { | |
883 | if(errno != EINTR) | |
884 | { | |
72a7835e | 885 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 886 | /* To avoid CPU hogging in case it's bad, which it |
887 | * probably is. */ | |
888 | sleep(1); | |
889 | } | |
d3372da9 | 890 | return(1); |
891 | } | |
892 | for(sk = sockets; sk != NULL; sk = next) | |
893 | { | |
894 | next = sk->next; | |
72a7835e | 895 | fd = sk->fd; |
d3372da9 | 896 | switch(sk->state) |
897 | { | |
898 | case SOCK_LST: | |
72a7835e | 899 | if(FD_ISSET(fd, &rfds)) |
d3372da9 | 900 | { |
901 | sslen = sizeof(ss); | |
72a7835e | 902 | if((newfd = accept(fd, (struct sockaddr *)&ss, &sslen)) < 0) |
cab0b442 | 903 | { |
904 | if(sk->errcb != NULL) | |
905 | sk->errcb(sk, errno, sk->data); | |
906 | } | |
d3372da9 | 907 | newsk = newsock(sk->type); |
908 | newsk->fd = newfd; | |
909 | newsk->family = sk->family; | |
910 | newsk->state = SOCK_EST; | |
911 | memcpy(newsk->remote = smalloc(sslen), &ss, sslen); | |
912 | newsk->remotelen = sslen; | |
9e5f2b29 | 913 | if(ss.ss_family == PF_UNIX) |
914 | acceptunix(newsk); | |
cab0b442 | 915 | if(sk->acceptcb != NULL) |
916 | sk->acceptcb(sk, newsk, sk->data); | |
9e5f2b29 | 917 | putsock(newsk); |
d3372da9 | 918 | } |
72a7835e | 919 | if(FD_ISSET(fd, &efds)) |
d3372da9 | 920 | { |
921 | retlen = sizeof(ret); | |
72a7835e | 922 | getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 | 923 | if(sk->errcb != NULL) |
924 | sk->errcb(sk, ret, sk->data); | |
d3372da9 | 925 | continue; |
926 | } | |
927 | break; | |
928 | case SOCK_SYN: | |
72a7835e | 929 | if(FD_ISSET(fd, &efds)) |
d3372da9 | 930 | { |
931 | retlen = sizeof(ret); | |
72a7835e | 932 | getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 | 933 | if(sk->conncb != NULL) |
934 | sk->conncb(sk, ret, sk->data); | |
d3372da9 | 935 | closesock(sk); |
936 | continue; | |
937 | } | |
72a7835e | 938 | if(FD_ISSET(fd, &rfds) || FD_ISSET(fd, &wfds)) |
d3372da9 | 939 | { |
940 | sk->state = SOCK_EST; | |
cab0b442 | 941 | if(sk->conncb != NULL) |
942 | sk->conncb(sk, 0, sk->data); | |
d3372da9 | 943 | } |
944 | break; | |
945 | case SOCK_EST: | |
72a7835e | 946 | if(FD_ISSET(fd, &efds)) |
d3372da9 | 947 | { |
948 | retlen = sizeof(ret); | |
72a7835e | 949 | getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 | 950 | if(sk->errcb != NULL) |
951 | sk->errcb(sk, ret, sk->data); | |
d3372da9 | 952 | closesock(sk); |
953 | continue; | |
954 | } | |
72a7835e | 955 | if(FD_ISSET(fd, &rfds)) |
d3372da9 | 956 | sockrecv(sk); |
72a7835e | 957 | if(FD_ISSET(fd, &wfds)) |
d3372da9 | 958 | { |
959 | if(sockqueuesize(sk) > 0) | |
960 | sockflush(sk); | |
961 | } | |
962 | break; | |
963 | } | |
d3372da9 | 964 | } |
d3372da9 | 965 | for(sk = sockets; sk != NULL; sk = next) |
966 | { | |
967 | next = sk->next; | |
968 | if(sk->refcount == 1 && (sockqueuesize(sk) == 0)) | |
969 | { | |
970 | unlinksock(sk); | |
971 | continue; | |
972 | } | |
973 | if(sk->close && (sockqueuesize(sk) == 0)) | |
974 | closesock(sk); | |
975 | if(sk->state == SOCK_STL) | |
976 | { | |
977 | unlinksock(sk); | |
978 | continue; | |
979 | } | |
980 | } | |
981 | return(1); | |
982 | } | |
983 | ||
984 | int socksettos(struct socket *sk, int tos) | |
985 | { | |
b020fb3d | 986 | int buf; |
f966ec56 | 987 | int dscp2tos; |
b020fb3d | 988 | |
7ab36fbd | 989 | if(sk->family == AF_UNIX) |
990 | return(0); /* Unix sockets are always perfect. :) */ | |
d3372da9 | 991 | if(sk->family == AF_INET) |
992 | { | |
f966ec56 | 993 | dscp2tos = confgetint("net", "dscp-tos"); |
b020fb3d | 994 | switch(tos) |
995 | { | |
b198bed6 | 996 | case 0: |
997 | buf = 0; | |
998 | break; | |
b020fb3d | 999 | case SOCK_TOS_MINCOST: |
f966ec56 FT |
1000 | if(dscp2tos) |
1001 | buf = confgetint("net", "diffserv-mincost") << 2; | |
1002 | else | |
1003 | buf = 0x02; | |
b020fb3d | 1004 | break; |
1005 | case SOCK_TOS_MAXREL: | |
f966ec56 FT |
1006 | if(dscp2tos) |
1007 | buf = confgetint("net", "diffserv-maxrel") << 2; | |
1008 | else | |
1009 | buf = 0x04; | |
b020fb3d | 1010 | break; |
1011 | case SOCK_TOS_MAXTP: | |
f966ec56 FT |
1012 | if(dscp2tos) |
1013 | buf = confgetint("net", "diffserv-maxtp") << 2; | |
1014 | else | |
1015 | buf = 0x08; | |
b020fb3d | 1016 | break; |
1017 | case SOCK_TOS_MINDELAY: | |
f966ec56 FT |
1018 | if(dscp2tos) |
1019 | buf = confgetint("net", "diffserv-mindelay") << 2; | |
1020 | else | |
1021 | buf = 0x10; | |
b020fb3d | 1022 | break; |
1023 | default: | |
1024 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1025 | return(-1); | |
1026 | } | |
e03e1e7c | 1027 | if(setsockopt(sk->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1028 | { |
1029 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1030 | return(-1); | |
1031 | } | |
1032 | return(0); | |
1033 | } | |
b020fb3d | 1034 | if(sk->family == AF_INET6) |
1035 | { | |
1036 | switch(tos) | |
1037 | { | |
b198bed6 | 1038 | case 0: |
1039 | buf = 0; | |
b020fb3d | 1040 | case SOCK_TOS_MINCOST: |
1041 | buf = confgetint("net", "diffserv-mincost"); | |
1042 | break; | |
1043 | case SOCK_TOS_MAXREL: | |
1044 | buf = confgetint("net", "diffserv-maxrel"); | |
1045 | break; | |
1046 | case SOCK_TOS_MAXTP: | |
1047 | buf = confgetint("net", "diffserv-maxtp"); | |
1048 | break; | |
1049 | case SOCK_TOS_MINDELAY: | |
1050 | buf = confgetint("net", "diffserv-mindelay"); | |
1051 | break; | |
1052 | default: | |
1053 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1054 | return(-1); | |
1055 | } | |
1056 | /* | |
1057 | On Linux, the API IPv6 flow label management doesn't seem to | |
1058 | be entirely complete, so I guess this will have to wait. | |
1059 | ||
1060 | if(setsockopt(...) < 0) | |
1061 | { | |
1062 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1063 | return(-1); | |
1064 | } | |
1065 | */ | |
1066 | return(0); | |
1067 | } | |
d3372da9 | 1068 | flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family); |
1069 | return(1); | |
1070 | } | |
1071 | ||
1072 | struct resolvedata | |
1073 | { | |
1074 | int fd; | |
1075 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1076 | void *data; | |
1077 | struct sockaddr_storage addr; | |
1078 | int addrlen; | |
1079 | }; | |
1080 | ||
1081 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1082 | { | |
1083 | static char buf[80]; | |
1084 | int ret; | |
1085 | struct sockaddr_in *ipv4; | |
1086 | ||
1087 | if(!status) | |
1088 | { | |
1089 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1090 | { | |
b4d16e90 | 1091 | errno = ENOENT; |
d3372da9 | 1092 | data->callback(NULL, 0, data->data); |
1093 | } else { | |
1094 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1095 | memcpy(&ipv4->sin_addr, buf, 4); | |
1096 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1097 | } | |
1098 | } else { | |
b4d16e90 | 1099 | errno = ENOENT; |
d3372da9 | 1100 | data->callback(NULL, 0, data->data); |
1101 | } | |
1102 | close(data->fd); | |
1103 | free(data); | |
1104 | } | |
1105 | ||
1106 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1107 | { | |
1108 | int i; | |
1109 | char *p; | |
1110 | int port; | |
1111 | int pfd[2]; | |
1112 | pid_t child; | |
1113 | struct resolvedata *rdata; | |
1114 | struct sockaddr_in ipv4; | |
1115 | struct hostent *he; | |
1116 | sigset_t sigset; | |
1117 | ||
1118 | /* IPv4 */ | |
1119 | port = -1; | |
1120 | if((p = strchr(addr, ':')) != NULL) | |
1121 | { | |
1122 | *p = 0; | |
1123 | port = atoi(p + 1); | |
1124 | } | |
1125 | ipv4.sin_family = AF_INET; | |
1126 | ipv4.sin_port = htons(port); | |
1127 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1128 | { | |
1129 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1130 | } else { | |
1131 | sigemptyset(&sigset); | |
1132 | sigaddset(&sigset, SIGCHLD); | |
1133 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1134 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1135 | { | |
1136 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1137 | return(-1); | |
1138 | } | |
1139 | if(child == 0) | |
1140 | { | |
1141 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1142 | for(i = 3; i < FD_SETSIZE; i++) | |
1143 | { | |
1144 | if(i != pfd[1]) | |
1145 | close(i); | |
1146 | } | |
1147 | signal(SIGALRM, SIG_DFL); | |
1148 | alarm(30); | |
1149 | if((he = gethostbyname(addr)) == NULL) | |
1150 | exit(1); | |
1151 | write(pfd[1], he->h_addr_list[0], 4); | |
1152 | exit(0); | |
1153 | } else { | |
1154 | close(pfd[1]); | |
1155 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1156 | rdata = smalloc(sizeof(*rdata)); | |
1157 | rdata->fd = pfd[0]; | |
1158 | rdata->callback = callback; | |
1159 | rdata->data = data; | |
1160 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1161 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1162 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1163 | return(1); | |
1164 | } | |
1165 | } | |
1166 | return(0); | |
1167 | } | |
1168 | ||
1169 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1170 | { | |
1171 | socklen_t len; | |
1172 | struct sockaddr_storage name; | |
1173 | ||
1174 | *namebuf = NULL; | |
1175 | if((sk->state == SOCK_STL) || (sk->fd < 0)) | |
1176 | return(-1); | |
1177 | len = sizeof(name); | |
1178 | if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0) | |
1179 | { | |
6fb0c6ac | 1180 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1181 | return(-1); |
1182 | } | |
1183 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1184 | if(lenbuf != NULL) |
1185 | *lenbuf = len; | |
d3372da9 | 1186 | return(0); |
1187 | } | |
1188 | ||
eaa35963 | 1189 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1190 | { | |
1191 | if(dst->sa_family != src->sa_family) | |
1192 | { | |
1193 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1194 | return; | |
1195 | } | |
1196 | switch(src->sa_family) | |
1197 | { | |
1198 | case AF_INET: | |
1199 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1200 | break; | |
1201 | case AF_INET6: | |
1202 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1203 | break; | |
1204 | default: | |
1205 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1206 | break; | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1211 | { |
6fb0c6ac | 1212 | int ret; |
eaa35963 | 1213 | socklen_t plen; |
1214 | struct sockaddr *pname; | |
1215 | ||
1216 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1217 | { | |
1218 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1219 | return(-1); | |
1220 | } | |
1221 | if(ret) | |
1222 | return(0); | |
1223 | sethostaddr(addr, pname); | |
1224 | free(pname); | |
1225 | return(0); | |
1226 | } | |
1227 | ||
1228 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1229 | { | |
d3372da9 | 1230 | socklen_t len; |
6fb0c6ac | 1231 | struct sockaddr *name; |
d3372da9 | 1232 | |
1233 | switch(confgetint("net", "mode")) | |
1234 | { | |
1235 | case 0: | |
1236 | *namebuf = NULL; | |
1237 | if((sk->state == SOCK_STL) || (sk->fd < 0)) | |
d3372da9 | 1238 | { |
eaa35963 | 1239 | errno = EBADF; |
d3372da9 | 1240 | return(-1); |
1241 | } | |
6fb0c6ac | 1242 | if(!sockgetlocalname(sk, &name, &len)) |
1243 | { | |
1244 | *namebuf = name; | |
1245 | *lenbuf = len; | |
eaa35963 | 1246 | makepublic(name); |
6fb0c6ac | 1247 | return(0); |
1248 | } | |
1249 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1250 | return(-1); | |
d3372da9 | 1251 | case 1: |
1252 | errno = EOPNOTSUPP; | |
1253 | return(-1); | |
1254 | default: | |
1255 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1256 | errno = EOPNOTSUPP; | |
1257 | return(-1); | |
1258 | } | |
1259 | } | |
1260 | ||
d29853b1 | 1261 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1262 | { | |
1263 | struct sockaddr *name1, *name2; | |
1264 | socklen_t len1, len2; | |
1265 | ||
1266 | if(sk->family != sk2->family) | |
1267 | { | |
1268 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family); | |
1269 | return(-1); | |
1270 | } | |
3804379d | 1271 | if(sockgetremotename(sk, &name1, &len1)) |
d29853b1 | 1272 | return(-1); |
3804379d | 1273 | if(sockgetremotename(sk2, &name2, &len2)) { |
d29853b1 | 1274 | free(name1); |
1275 | return(-1); | |
1276 | } | |
1277 | sethostaddr(name1, name2); | |
1278 | free(name2); | |
1279 | *namebuf = name1; | |
1280 | *lenbuf = len1; | |
1281 | return(0); | |
1282 | } | |
1283 | ||
99a28d47 | 1284 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1285 | { | |
1286 | struct sockaddr_un *u1, *u2; | |
1287 | struct sockaddr_in *n1, *n2; | |
1288 | #ifdef HAVE_IPV6 | |
1289 | struct sockaddr_in6 *s1, *s2; | |
1290 | #endif | |
1291 | ||
1292 | if(x->sa_family != y->sa_family) | |
1293 | return(0); | |
1294 | switch(x->sa_family) { | |
1295 | case AF_UNIX: | |
1296 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1297 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1298 | return(0); | |
1299 | break; | |
1300 | case AF_INET: | |
1301 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1302 | if(n1->sin_port != n2->sin_port) | |
1303 | return(0); | |
1304 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1305 | return(0); | |
1306 | break; | |
c8a729d7 | 1307 | #ifdef HAVE_IPV6 |
99a28d47 | 1308 | case AF_INET6: |
1309 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1310 | if(s1->sin6_port != s2->sin6_port) | |
1311 | return(0); | |
1312 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1313 | return(0); | |
1314 | break; | |
c8a729d7 | 1315 | #endif |
99a28d47 | 1316 | } |
1317 | return(1); | |
1318 | } | |
1319 | ||
d3372da9 | 1320 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1321 | { | |
d3372da9 | 1322 | struct sockaddr_in *ipv4; |
1323 | #ifdef HAVE_IPV6 | |
1324 | struct sockaddr_in6 *ipv6; | |
1325 | #endif | |
1326 | static char *ret = NULL; | |
1327 | char buf[1024]; | |
1328 | ||
1329 | if(ret != NULL) | |
1330 | free(ret); | |
1331 | ret = NULL; | |
1332 | switch(arg->sa_family) | |
1333 | { | |
1334 | case AF_UNIX: | |
6a97462e | 1335 | ret = sstrdup("Unix socket"); |
d3372da9 | 1336 | break; |
1337 | case AF_INET: | |
1338 | ipv4 = (struct sockaddr_in *)arg; | |
1339 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1340 | return(NULL); | |
1341 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1342 | break; | |
1343 | #ifdef HAVE_IPV6 | |
1344 | case AF_INET6: | |
1345 | ipv6 = (struct sockaddr_in6 *)arg; | |
1346 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1347 | return(NULL); | |
fc7f7735 | 1348 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1349 | break; |
1350 | #endif | |
1351 | default: | |
1352 | errno = EPFNOSUPPORT; | |
1353 | break; | |
1354 | } | |
1355 | return(ret); | |
1356 | } | |
1357 | ||
1358 | #if 0 | |
1359 | ||
1360 | /* | |
1361 | * It was very nice to use this, but it seems | |
1362 | * to mess things up, so I guess it has to go... :-( | |
1363 | */ | |
1364 | ||
1365 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1366 | { | |
1367 | struct sockaddr *arg; | |
1368 | socklen_t arglen; | |
1369 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1370 | * lowercase letters to 1, so I do this | |
1371 | * instead. */ | |
1372 | struct sockaddr_in *ipv4; | |
1373 | int ret; | |
1374 | ||
1375 | arg = *(struct sockaddr **)(args[0]); | |
1376 | arglen = *(socklen_t *)(args[1]); | |
1377 | switch(arg->sa_family) | |
1378 | { | |
1379 | case AF_UNIX: | |
1380 | UNIX = (struct sockaddr_un *)arg; | |
1381 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1382 | break; | |
1383 | case AF_INET: | |
1384 | ipv4 = (struct sockaddr_in *)arg; | |
1385 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1386 | break; | |
1387 | default: | |
1388 | ret = -1; | |
1389 | errno = EPFNOSUPPORT; | |
1390 | break; | |
1391 | } | |
1392 | return(ret); | |
1393 | } | |
1394 | ||
1395 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1396 | { | |
1397 | if(n > 0) | |
1398 | argtypes[0] = PA_POINTER; | |
1399 | if(n > 1) | |
1400 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1401 | * be an int, so I guess this should be | |
1402 | * safe. */ | |
1403 | return(2); | |
1404 | } | |
1405 | #endif | |
1406 | ||
1407 | static int init(int hup) | |
1408 | { | |
1409 | if(!hup) | |
1410 | { | |
1411 | /* | |
1412 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1413 | { | |
1414 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1415 | return(1); | |
1416 | } | |
1417 | */ | |
1418 | } | |
1419 | return(0); | |
1420 | } | |
1421 | ||
1422 | static void terminate(void) | |
1423 | { | |
1424 | while(sockets != NULL) | |
1425 | unlinksock(sockets); | |
1426 | } | |
1427 | ||
1428 | static struct module me = | |
1429 | { | |
1430 | .name = "net", | |
1431 | .conf = | |
1432 | { | |
1433 | .vars = myvars | |
1434 | }, | |
1435 | .init = init, | |
1436 | .terminate = terminate | |
1437 | }; | |
1438 | ||
1439 | MODULE(me) |