Commit | Line | Data |
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d3372da9 | 1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client | |
302a2600 | 3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | /* XXX: Implement SOCKS proxyability */ | |
20 | ||
21 | #ifdef HAVE_CONFIG_H | |
22 | #include <config.h> | |
23 | #endif | |
24 | #include <string.h> | |
25 | #include <stdlib.h> | |
26 | #include <unistd.h> | |
27 | #include <fcntl.h> | |
28 | #include <sys/ioctl.h> | |
29 | #include <sys/socket.h> | |
30 | #include <sys/un.h> | |
72a7835e | 31 | #include <sys/select.h> |
d3372da9 | 32 | #include <arpa/inet.h> |
33 | #include <netinet/in.h> | |
34 | #include <netdb.h> | |
35 | #include <sys/signal.h> | |
7ab36fbd | 36 | #include <sys/stat.h> /* For rebindunix() */ |
d3372da9 | 37 | #ifdef HAVE_LINUX_SOCKIOS_H |
38 | #include <linux/sockios.h> | |
39 | #endif | |
40 | #include <errno.h> | |
41 | #include <net/if.h> | |
42 | ||
43 | #include "conf.h" | |
44 | #include "net.h" | |
45 | #include "module.h" | |
46 | #include "log.h" | |
47 | #include "utils.h" | |
48 | #include "sysevents.h" | |
49 | ||
50 | static struct configvar myvars[] = | |
51 | { | |
d9f89ef5 | 52 | /** The network mode to use. Currently supported values are 0 for |
53 | * active mode and 1 for passive mode. In the future, SOCKS5 proxy | |
54 | * support may be added. */ | |
d3372da9 | 55 | {CONF_VAR_INT, "mode", {.num = 0}}, |
d9f89ef5 | 56 | /** Set the SO_REUSEADDR socket option on listening sockets, so |
57 | * that dead TCP connections waiting for timeout are ignored. */ | |
347d6d76 | 58 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
d9f89ef5 | 59 | /** Overrides the IPv4 address reported to other clients in active |
60 | * mode. Useful for servers behind NAT routers. If both this and | |
61 | * net.publicif are unspecified the address of the hub connection | |
62 | * is used. */ | |
d3372da9 | 63 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
d9f89ef5 | 64 | /** Specifies an interface name from which to fetch the IPv4 |
65 | * address reported to other clients in active mode. If both this | |
66 | * and net.visibleipv4 are unspecified the address of the hub | |
67 | * connection is used. */ | |
d3372da9 | 68 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
d9f89ef5 | 69 | /** The Diffserv value to use on IPv6 connections when the |
70 | * minimize cost TOS value is used (see the TOS VALUES | |
71 | * section). */ | |
b020fb3d | 72 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
d9f89ef5 | 73 | /** The Diffserv value to use on IPv6 connections when the |
74 | * maximize reliability TOS value is used (see the TOS VALUES | |
75 | * section). */ | |
b020fb3d | 76 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
d9f89ef5 | 77 | /** The Diffserv value to use on IPv6 connections when the |
78 | * maximize throughput TOS value is used (see the TOS VALUES | |
79 | * section). */ | |
b020fb3d | 80 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
d9f89ef5 | 81 | /** The Diffserv value to use on IPv6 connections when the |
82 | * minimize delay TOS value is used (see the TOS VALUES | |
83 | * section). */ | |
b020fb3d | 84 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
f966ec56 | 85 | /** If enabled, the IP TOS interface will be used to set Diffserv |
56e7e7e7 | 86 | * codepoints on IPv4 sockets, by shifting the DSCP value two bits |
c8c6be24 FT |
87 | * to the left (remember, the DSCP field in the IPv4 header is |
88 | * defined as the 6 uppermost bits of the TOS field, the lower two | |
89 | * being left for ECN). This may only work on Linux. */ | |
f966ec56 | 90 | {CONF_VAR_BOOL, "dscp-tos", {.num = 0}}, |
d3372da9 | 91 | {CONF_VAR_END} |
92 | }; | |
93 | ||
94 | static struct socket *sockets = NULL; | |
95 | int numsocks = 0; | |
96 | ||
97 | /* XXX: Get autoconf for all this... */ | |
98 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) | |
99 | { | |
100 | struct sockaddr_in *ipv4; | |
101 | struct configvar *var; | |
102 | void *bufend; | |
103 | int sock; | |
104 | struct ifconf conf; | |
105 | struct ifreq *ifr, req; | |
106 | char *pif; | |
107 | ||
108 | if(af == AF_INET) | |
109 | { | |
110 | var = confgetvar("net", "visibleipv4"); | |
111 | if(var->val.ipv4.s_addr != 0) | |
112 | { | |
113 | ipv4 = smalloc(sizeof(*ipv4)); | |
114 | ipv4->sin_family = AF_INET; | |
115 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; | |
116 | *addr = (struct sockaddr *)ipv4; | |
117 | *lenbuf = sizeof(*ipv4); | |
118 | return(0); | |
119 | } | |
bcb73bb3 | 120 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 | 121 | { |
122 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); | |
123 | return(-1); | |
124 | } | |
6fb0c6ac | 125 | if(!strcmp(pif, "")) |
126 | return(1); | |
d3372da9 | 127 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
128 | return(-1); | |
129 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); | |
130 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
131 | { | |
132 | free(conf.ifc_buf); | |
133 | close(sock); | |
134 | return(-1); | |
135 | } | |
136 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; | |
137 | ipv4 = NULL; | |
138 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) | |
139 | { | |
1315d02a | 140 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac | 141 | continue; |
d3372da9 | 142 | memset(&req, 0, sizeof(req)); |
143 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); | |
144 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) | |
6fb0c6ac | 145 | break; |
146 | if(!(req.ifr_flags & IFF_UP)) | |
d3372da9 | 147 | { |
6fb0c6ac | 148 | flog(LOG_WARNING, "public interface is down"); |
149 | break; | |
d3372da9 | 150 | } |
6fb0c6ac | 151 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 | 152 | { |
6fb0c6ac | 153 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
154 | break; | |
d3372da9 | 155 | } |
6fb0c6ac | 156 | ipv4 = smalloc(sizeof(*ipv4)); |
157 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); | |
158 | break; | |
d3372da9 | 159 | } |
bcb73bb3 | 160 | free(conf.ifc_buf); |
d3372da9 | 161 | close(sock); |
162 | if(ipv4 != NULL) | |
163 | { | |
164 | *addr = (struct sockaddr *)ipv4; | |
165 | *lenbuf = sizeof(*ipv4); | |
166 | return(0); | |
167 | } | |
168 | errno = ENETDOWN; | |
169 | return(-1); | |
170 | } | |
6fb0c6ac | 171 | return(1); |
d3372da9 | 172 | } |
173 | ||
174 | static struct socket *newsock(int type) | |
175 | { | |
176 | struct socket *new; | |
177 | ||
178 | new = smalloc(sizeof(*new)); | |
c7ff7e93 | 179 | memset(new, 0, sizeof(*new)); |
d3372da9 | 180 | new->refcount = 2; |
181 | new->fd = -1; | |
182 | new->isrealsocket = 1; | |
183 | new->family = -1; | |
184 | new->tos = 0; | |
185 | new->type = type; | |
186 | new->state = -1; | |
187 | new->ignread = 0; | |
188 | new->close = 0; | |
189 | new->remote = NULL; | |
190 | new->remotelen = 0; | |
a8c5ada6 | 191 | new->ucred.uid = -1; |
192 | new->ucred.gid = -1; | |
d3372da9 | 193 | switch(type) |
194 | { | |
195 | case SOCK_STREAM: | |
196 | new->outbuf.s.buf = NULL; | |
197 | new->outbuf.s.bufsize = 0; | |
198 | new->outbuf.s.datasize = 0; | |
199 | new->inbuf.s.buf = NULL; | |
200 | new->inbuf.s.bufsize = 0; | |
201 | new->inbuf.s.datasize = 0; | |
202 | break; | |
203 | case SOCK_DGRAM: | |
204 | new->outbuf.d.f = new->outbuf.d.l = NULL; | |
205 | new->inbuf.d.f = new->inbuf.d.l = NULL; | |
206 | break; | |
207 | } | |
cab0b442 | 208 | new->conncb = NULL; |
209 | new->errcb = NULL; | |
210 | new->readcb = NULL; | |
211 | new->writecb = NULL; | |
212 | new->acceptcb = NULL; | |
d3372da9 | 213 | new->next = sockets; |
214 | new->prev = NULL; | |
215 | if(sockets != NULL) | |
216 | sockets->prev = new; | |
217 | sockets = new; | |
218 | numsocks++; | |
219 | return(new); | |
220 | } | |
221 | ||
222 | static struct socket *mksock(int domain, int type) | |
223 | { | |
224 | int fd; | |
225 | struct socket *new; | |
226 | ||
227 | if((fd = socket(domain, type, 0)) < 0) | |
228 | { | |
229 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
230 | return(NULL); | |
231 | } | |
232 | new = newsock(type); | |
233 | new->fd = fd; | |
234 | new->family = domain; | |
235 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); | |
236 | return(new); | |
237 | } | |
238 | ||
239 | struct socket *wrapsock(int fd) | |
240 | { | |
241 | struct socket *new; | |
242 | ||
243 | new = newsock(SOCK_STREAM); | |
244 | new->fd = fd; | |
245 | new->state = SOCK_EST; | |
246 | new->isrealsocket = 0; | |
247 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); | |
248 | return(new); | |
249 | } | |
250 | ||
251 | static void unlinksock(struct socket *sk) | |
252 | { | |
253 | if(sk->prev != NULL) | |
254 | sk->prev->next = sk->next; | |
255 | if(sk->next != NULL) | |
256 | sk->next->prev = sk->prev; | |
257 | if(sk == sockets) | |
258 | sockets = sk->next; | |
259 | putsock(sk); | |
260 | numsocks--; | |
261 | } | |
262 | ||
263 | void getsock(struct socket *sk) | |
264 | { | |
265 | sk->refcount++; | |
266 | } | |
267 | ||
268 | void putsock(struct socket *sk) | |
269 | { | |
270 | struct dgrambuf *buf; | |
271 | ||
272 | if(--(sk->refcount) == 0) | |
273 | { | |
274 | switch(sk->type) | |
275 | { | |
276 | case SOCK_STREAM: | |
277 | if(sk->outbuf.s.buf != NULL) | |
278 | free(sk->outbuf.s.buf); | |
279 | if(sk->inbuf.s.buf != NULL) | |
280 | free(sk->inbuf.s.buf); | |
281 | break; | |
282 | case SOCK_DGRAM: | |
283 | while((buf = sk->outbuf.d.f) != NULL) | |
284 | { | |
285 | sk->outbuf.d.f = buf->next; | |
286 | free(buf->data); | |
161604ea | 287 | free(buf->addr); |
d3372da9 | 288 | free(buf); |
289 | } | |
290 | while((buf = sk->inbuf.d.f) != NULL) | |
291 | { | |
292 | sk->inbuf.d.f = buf->next; | |
293 | free(buf->data); | |
161604ea | 294 | free(buf->addr); |
d3372da9 | 295 | free(buf); |
296 | } | |
297 | break; | |
298 | } | |
b870805e | 299 | closesock(sk); |
d3372da9 | 300 | if(sk->remote != NULL) |
301 | free(sk->remote); | |
302 | free(sk); | |
303 | } | |
304 | } | |
305 | ||
336539c2 | 306 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
307 | { | |
308 | switch(sk->type) | |
309 | { | |
310 | case SOCK_STREAM: | |
311 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1); | |
312 | memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize); | |
313 | memcpy(sk->inbuf.s.buf, buf, size); | |
314 | sk->inbuf.s.datasize += size; | |
315 | break; | |
316 | case SOCK_DGRAM: | |
317 | /* XXX */ | |
318 | break; | |
319 | } | |
320 | return; | |
321 | } | |
322 | ||
d3372da9 | 323 | void *sockgetinbuf(struct socket *sk, size_t *size) |
324 | { | |
325 | void *buf; | |
326 | struct dgrambuf *dbuf; | |
327 | ||
328 | switch(sk->type) | |
329 | { | |
330 | case SOCK_STREAM: | |
331 | if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0)) | |
332 | { | |
333 | *size = 0; | |
334 | return(NULL); | |
335 | } | |
336 | buf = sk->inbuf.s.buf; | |
337 | *size = sk->inbuf.s.datasize; | |
338 | sk->inbuf.s.buf = NULL; | |
339 | sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0; | |
340 | return(buf); | |
341 | case SOCK_DGRAM: | |
342 | if((dbuf = sk->inbuf.d.f) == NULL) | |
343 | return(NULL); | |
344 | sk->inbuf.d.f = dbuf->next; | |
345 | if(dbuf->next == NULL) | |
346 | sk->inbuf.d.l = NULL; | |
347 | buf = dbuf->data; | |
348 | *size = dbuf->size; | |
349 | free(dbuf->addr); | |
350 | free(dbuf); | |
351 | return(buf); | |
352 | } | |
353 | return(NULL); | |
354 | } | |
355 | ||
9e5f2b29 | 356 | static void recvcmsg(struct socket *sk, struct msghdr *msg) |
357 | { | |
358 | struct cmsghdr *cmsg; | |
9e5f2b29 | 359 | |
360 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
361 | { | |
a8c5ada6 | 362 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 363 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
364 | { | |
a8c5ada6 | 365 | struct ucred *cred; |
366 | if(sk->ucred.uid == -1) | |
9e5f2b29 | 367 | { |
368 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
a8c5ada6 | 369 | sk->ucred.uid = cred->uid; |
370 | sk->ucred.gid = cred->gid; | |
9e5f2b29 | 371 | } |
372 | } | |
a8c5ada6 | 373 | #endif |
9e5f2b29 | 374 | } |
375 | } | |
376 | ||
d3372da9 | 377 | static void sockrecv(struct socket *sk) |
378 | { | |
379 | int ret, inq; | |
380 | struct dgrambuf *dbuf; | |
9e5f2b29 | 381 | struct msghdr msg; |
382 | char cbuf[65536]; | |
383 | struct iovec bufvec; | |
d3372da9 | 384 | |
9e5f2b29 | 385 | memset(&msg, 0, sizeof(msg)); |
386 | msg.msg_iov = &bufvec; | |
387 | msg.msg_iovlen = 1; | |
388 | msg.msg_control = cbuf; | |
389 | msg.msg_controllen = sizeof(cbuf); | |
d3372da9 | 390 | switch(sk->type) |
391 | { | |
392 | case SOCK_STREAM: | |
393 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
394 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
395 | * how to read the inqueue size on other OSs */ | |
dcf7a1a2 FT |
396 | if(sk->isrealsocket) { |
397 | if(ioctl(sk->fd, SIOCINQ, &inq)) | |
398 | { | |
399 | /* I don't really know what could go wrong here, so let's | |
400 | * assume it's transient. */ | |
401 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd); | |
402 | inq = 2048; | |
403 | } | |
404 | } else { | |
405 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
406 | inq = 65536; | |
d3372da9 | 407 | } |
408 | #else | |
409 | inq = 2048; | |
410 | #endif | |
411 | if(inq > 65536) | |
412 | inq = 65536; | |
413 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1); | |
987518f8 | 414 | if(sk->isrealsocket) |
415 | { | |
416 | bufvec.iov_base = sk->inbuf.s.buf + sk->inbuf.s.datasize; | |
417 | bufvec.iov_len = inq; | |
418 | ret = recvmsg(sk->fd, &msg, 0); | |
419 | } else { | |
420 | ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq); | |
421 | msg.msg_controllen = 0; | |
422 | msg.msg_flags = 0; | |
423 | } | |
d3372da9 | 424 | if(ret < 0) |
425 | { | |
426 | if((errno == EINTR) || (errno == EAGAIN)) | |
427 | return; | |
cab0b442 | 428 | if(sk->errcb != NULL) |
429 | sk->errcb(sk, errno, sk->data); | |
d3372da9 | 430 | closesock(sk); |
431 | return; | |
432 | } | |
9e5f2b29 | 433 | if(msg.msg_flags & MSG_CTRUNC) |
434 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
435 | else | |
436 | recvcmsg(sk, &msg); | |
d3372da9 | 437 | if(ret == 0) |
438 | { | |
cab0b442 | 439 | if(sk->errcb != NULL) |
440 | sk->errcb(sk, 0, sk->data); | |
d3372da9 | 441 | closesock(sk); |
442 | return; | |
443 | } | |
444 | sk->inbuf.s.datasize += ret; | |
cab0b442 | 445 | if(sk->readcb != NULL) |
446 | sk->readcb(sk, sk->data); | |
d3372da9 | 447 | break; |
448 | case SOCK_DGRAM: | |
9e5f2b29 | 449 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
d3372da9 | 450 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
451 | { | |
452 | /* I don't really know what could go wrong here, so let's | |
453 | * assume it's transient. */ | |
454 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd); | |
455 | return; | |
456 | } | |
9e5f2b29 | 457 | #else |
458 | inq = 65536; | |
459 | #endif | |
d3372da9 | 460 | dbuf = smalloc(sizeof(*dbuf)); |
461 | dbuf->data = smalloc(inq); | |
462 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 463 | /* |
d3372da9 | 464 | ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen); |
9e5f2b29 | 465 | */ |
466 | msg.msg_name = dbuf->addr; | |
467 | msg.msg_namelen = dbuf->addrlen; | |
468 | bufvec.iov_base = dbuf->data; | |
469 | bufvec.iov_len = inq; | |
470 | ret = recvmsg(sk->fd, &msg, 0); | |
471 | dbuf->addrlen = msg.msg_namelen; | |
d3372da9 | 472 | if(ret < 0) |
473 | { | |
474 | free(dbuf->addr); | |
475 | free(dbuf->data); | |
476 | free(dbuf); | |
477 | if((errno == EINTR) || (errno == EAGAIN)) | |
478 | return; | |
cab0b442 | 479 | if(sk->errcb != NULL) |
480 | sk->errcb(sk, errno, sk->data); | |
d3372da9 | 481 | closesock(sk); |
482 | return; | |
483 | } | |
9e5f2b29 | 484 | if(msg.msg_flags & MSG_CTRUNC) |
485 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
486 | else | |
487 | recvcmsg(sk, &msg); | |
d3372da9 | 488 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
489 | * have EOF), but rather an empty packet. I don't know if any | |
490 | * other potential DGRAM protocols might have an EOF | |
491 | * condition, so let's play safe. */ | |
492 | if(ret == 0) | |
493 | { | |
494 | free(dbuf->addr); | |
495 | free(dbuf->data); | |
496 | free(dbuf); | |
497 | if(!((sk->family == AF_INET) || (sk->family == AF_INET6))) | |
498 | { | |
cab0b442 | 499 | if(sk->errcb != NULL) |
500 | sk->errcb(sk, 0, sk->data); | |
d3372da9 | 501 | closesock(sk); |
502 | } | |
503 | return; | |
504 | } | |
505 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
506 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
507 | dbuf->next = NULL; | |
508 | if(sk->inbuf.d.l != NULL) | |
509 | sk->inbuf.d.l->next = dbuf; | |
510 | else | |
511 | sk->inbuf.d.f = dbuf; | |
512 | sk->inbuf.d.l = dbuf; | |
cab0b442 | 513 | if(sk->readcb != NULL) |
514 | sk->readcb(sk, sk->data); | |
d3372da9 | 515 | break; |
516 | } | |
517 | } | |
518 | ||
519 | static void sockflush(struct socket *sk) | |
520 | { | |
521 | int ret; | |
522 | struct dgrambuf *dbuf; | |
523 | ||
524 | switch(sk->type) | |
525 | { | |
526 | case SOCK_STREAM: | |
527 | if(sk->isrealsocket) | |
528 | ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
529 | else | |
530 | ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize); | |
531 | if(ret < 0) | |
532 | { | |
c7ff7e93 FT |
533 | if((errno != EINTR) && (errno != EAGAIN)) |
534 | { | |
535 | if(sk->errcb != NULL) | |
536 | sk->errcb(sk, errno, sk->data); | |
537 | closesock(sk); | |
538 | } | |
d3372da9 | 539 | break; |
540 | } | |
541 | if(ret > 0) | |
542 | { | |
543 | memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret); | |
cab0b442 | 544 | if(sk->writecb != NULL) |
545 | sk->writecb(sk, sk->data); | |
d3372da9 | 546 | } |
547 | break; | |
548 | case SOCK_DGRAM: | |
549 | dbuf = sk->outbuf.d.f; | |
550 | if((sk->outbuf.d.f = dbuf->next) == NULL) | |
551 | sk->outbuf.d.l = NULL; | |
552 | sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
553 | free(dbuf->data); | |
554 | free(dbuf->addr); | |
555 | free(dbuf); | |
cab0b442 | 556 | if(sk->writecb != NULL) |
557 | sk->writecb(sk, sk->data); | |
d3372da9 | 558 | break; |
559 | } | |
560 | } | |
561 | ||
562 | void closesock(struct socket *sk) | |
563 | { | |
b870805e | 564 | struct sockaddr_un *un; |
565 | ||
e0cbc756 | 566 | if((sk->family == AF_UNIX) && !sockgetlocalname(sk, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX)) |
b870805e | 567 | { |
7ab36fbd | 568 | if((sk->state == SOCK_LST) && strchr(un->sun_path, '/')) |
b870805e | 569 | { |
570 | if(unlink(un->sun_path)) | |
7ab36fbd | 571 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); |
b870805e | 572 | } |
573 | } | |
d3372da9 | 574 | sk->state = SOCK_STL; |
575 | close(sk->fd); | |
576 | sk->fd = -1; | |
577 | sk->close = 0; | |
578 | } | |
579 | ||
580 | void sockqueue(struct socket *sk, void *data, size_t size) | |
581 | { | |
582 | struct dgrambuf *new; | |
583 | ||
584 | if(sk->state == SOCK_STL) | |
585 | return; | |
586 | switch(sk->type) | |
587 | { | |
588 | case SOCK_STREAM: | |
589 | sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1); | |
590 | memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size); | |
591 | sk->outbuf.s.datasize += size; | |
592 | break; | |
593 | case SOCK_DGRAM: | |
594 | if(sk->remote == NULL) | |
595 | return; | |
596 | new = smalloc(sizeof(*new)); | |
597 | new->next = NULL; | |
598 | memcpy(new->data = smalloc(size), data, new->size = size); | |
599 | memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen); | |
600 | if(sk->outbuf.d.l == NULL) | |
601 | { | |
602 | sk->outbuf.d.l = sk->outbuf.d.f = new; | |
603 | } else { | |
604 | sk->outbuf.d.l->next = new; | |
605 | sk->outbuf.d.l = new; | |
606 | } | |
607 | break; | |
608 | } | |
609 | } | |
610 | ||
611 | size_t sockgetdatalen(struct socket *sk) | |
612 | { | |
613 | struct dgrambuf *b; | |
614 | size_t ret; | |
615 | ||
616 | switch(sk->type) | |
617 | { | |
618 | case SOCK_STREAM: | |
619 | ret = sk->inbuf.s.datasize; | |
620 | break; | |
621 | case SOCK_DGRAM: | |
622 | ret = 0; | |
623 | for(b = sk->inbuf.d.f; b != NULL; b = b->next) | |
624 | ret += b->size; | |
625 | break; | |
626 | } | |
627 | return(ret); | |
628 | } | |
629 | ||
630 | size_t sockqueuesize(struct socket *sk) | |
631 | { | |
632 | struct dgrambuf *b; | |
633 | size_t ret; | |
634 | ||
635 | switch(sk->type) | |
636 | { | |
637 | case SOCK_STREAM: | |
638 | ret = sk->outbuf.s.datasize; | |
639 | break; | |
640 | case SOCK_DGRAM: | |
641 | ret = 0; | |
642 | for(b = sk->outbuf.d.f; b != NULL; b = b->next) | |
643 | ret += b->size; | |
644 | break; | |
645 | } | |
646 | return(ret); | |
647 | } | |
648 | ||
d3372da9 | 649 | /* |
7ab36fbd | 650 | * Seriously, I don't know if it's naughty or not to remove |
651 | * pre-existing Unix sockets. | |
652 | */ | |
653 | static int rebindunix(struct socket *sk, struct sockaddr *name, socklen_t namelen) | |
654 | { | |
655 | struct sockaddr_un *un; | |
656 | struct stat sb; | |
657 | ||
658 | if((sk->family != AF_UNIX) || (name->sa_family != PF_UNIX)) | |
659 | return(-1); | |
660 | un = (struct sockaddr_un *)name; | |
661 | if(stat(un->sun_path, &sb)) | |
662 | return(-1); | |
663 | if(!S_ISSOCK(sb.st_mode)) | |
664 | return(-1); | |
665 | if(unlink(un->sun_path)) | |
666 | return(-1); | |
667 | if(bind(sk->fd, name, namelen) < 0) | |
668 | return(-1); | |
669 | return(0); | |
670 | } | |
671 | ||
672 | /* | |
d3372da9 | 673 | * The difference between netcslisten() and netcslistenlocal() is that |
674 | * netcslistenlocal() always listens on the local host, instead of | |
675 | * following proxy/passive mode directions. It is suitable for eg. the | |
676 | * UI channel, while the file sharing networks should, naturally, use | |
677 | * netcslisten() instead. | |
678 | */ | |
679 | ||
cab0b442 | 680 | struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
d3372da9 | 681 | { |
682 | struct socket *sk; | |
66c517d2 | 683 | int intbuf; |
d3372da9 | 684 | |
685 | /* I don't know if this is actually correct (it probably isn't), | |
686 | * but since, at on least Linux systems, PF_* are specifically | |
687 | * #define'd to their AF_* counterparts, it allows for a severely | |
688 | * smoother implementation. If it breaks something on your | |
689 | * platform, please tell me so. | |
690 | */ | |
691 | if((sk = mksock(name->sa_family, type)) == NULL) | |
692 | return(NULL); | |
693 | sk->state = SOCK_LST; | |
687b2ee2 | 694 | if(confgetint("net", "reuseaddr")) |
695 | { | |
696 | intbuf = 1; | |
697 | setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); | |
698 | } | |
7ab36fbd | 699 | if((bind(sk->fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(sk, name, namelen) < 0))) |
d3372da9 | 700 | { |
701 | putsock(sk); | |
702 | return(NULL); | |
703 | } | |
704 | if(listen(sk->fd, 16) < 0) | |
705 | { | |
706 | putsock(sk); | |
707 | return(NULL); | |
708 | } | |
cab0b442 | 709 | sk->acceptcb = func; |
710 | sk->data = data; | |
d3372da9 | 711 | return(sk); |
712 | } | |
713 | ||
cab0b442 | 714 | struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
c23acc61 | 715 | { |
716 | if(confgetint("net", "mode") == 1) | |
717 | { | |
718 | errno = EOPNOTSUPP; | |
719 | return(NULL); | |
720 | } | |
c23acc61 | 721 | if(confgetint("net", "mode") == 0) |
722 | return(netcslistenlocal(type, name, namelen, func, data)); | |
723 | errno = EOPNOTSUPP; | |
724 | return(NULL); | |
725 | } | |
726 | ||
cab0b442 | 727 | struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data) |
0a1bc5b1 | 728 | { |
729 | struct sockaddr_in addr; | |
730 | #ifdef HAVE_IPV6 | |
731 | struct sockaddr_in6 addr6; | |
732 | #endif | |
cab0b442 | 733 | struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *); |
0a1bc5b1 | 734 | struct socket *ret; |
735 | ||
736 | if(local) | |
737 | csfunc = netcslistenlocal; | |
738 | else | |
739 | csfunc = netcslisten; | |
740 | #ifdef HAVE_IPV6 | |
741 | memset(&addr6, 0, sizeof(addr6)); | |
742 | addr6.sin6_family = AF_INET6; | |
743 | addr6.sin6_port = htons(port); | |
744 | addr6.sin6_addr = in6addr_any; | |
745 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
746 | return(ret); | |
747 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
748 | return(NULL); | |
749 | #endif | |
750 | memset(&addr, 0, sizeof(addr)); | |
751 | addr.sin_family = AF_INET; | |
752 | addr.sin_port = htons(port); | |
753 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
754 | } | |
755 | ||
d3372da9 | 756 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
757 | { | |
758 | struct socket *sk; | |
759 | int mode; | |
760 | ||
761 | mode = confgetint("net", "mode"); | |
762 | if((mode == 0) || (mode == 1)) | |
763 | { | |
764 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
765 | return(NULL); | |
766 | if(bind(sk->fd, name, namelen) < 0) | |
767 | { | |
768 | putsock(sk); | |
769 | return(NULL); | |
770 | } | |
771 | sk->state = SOCK_EST; | |
772 | return(sk); | |
773 | } | |
774 | errno = EOPNOTSUPP; | |
775 | return(NULL); | |
776 | } | |
777 | ||
778 | struct socket *netdupsock(struct socket *sk) | |
779 | { | |
780 | struct socket *newsk; | |
781 | ||
782 | newsk = newsock(sk->type); | |
783 | if((newsk->fd = dup(sk->fd)) < 0) | |
784 | { | |
785 | flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno)); | |
786 | putsock(newsk); | |
787 | return(NULL); | |
788 | } | |
789 | newsk->state = sk->state; | |
790 | newsk->ignread = sk->ignread; | |
791 | if(sk->remote != NULL) | |
792 | memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen); | |
793 | return(newsk); | |
794 | } | |
795 | ||
796 | void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) | |
797 | { | |
798 | if(sk->remote != NULL) | |
799 | free(sk->remote); | |
800 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); | |
801 | sk->ignread = 1; | |
802 | } | |
803 | ||
cab0b442 | 804 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 805 | { |
806 | struct socket *sk; | |
807 | int mode; | |
808 | ||
809 | mode = confgetint("net", "mode"); | |
810 | if((mode == 0) || (mode == 1)) | |
811 | { | |
812 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
813 | return(NULL); | |
814 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); | |
815 | if(!connect(sk->fd, addr, addrlen)) | |
816 | { | |
817 | sk->state = SOCK_EST; | |
818 | func(sk, 0, data); | |
819 | return(sk); | |
820 | } | |
821 | if(errno == EINPROGRESS) | |
822 | { | |
823 | sk->state = SOCK_SYN; | |
cab0b442 | 824 | sk->conncb = func; |
825 | sk->data = data; | |
d3372da9 | 826 | return(sk); |
827 | } | |
828 | putsock(sk); | |
829 | return(NULL); | |
830 | } | |
831 | errno = EOPNOTSUPP; | |
832 | return(NULL); | |
833 | } | |
834 | ||
9e5f2b29 | 835 | static void acceptunix(struct socket *sk) |
836 | { | |
837 | int buf; | |
838 | ||
839 | buf = 1; | |
a8c5ada6 | 840 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 841 | if(setsockopt(sk->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
842 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", sk->fd, strerror(errno)); | |
a8c5ada6 | 843 | #elif UNIX_AUTH_STYLE == 2 |
844 | if(getpeereid(sk->fd, &sk->ucred.uid, &sk->ucred.gid) < 0) | |
845 | { | |
846 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", sk->fd, strerror(errno)); | |
847 | sk->ucred.uid = -1; | |
848 | sk->ucred.gid = -1; | |
849 | } | |
850 | #endif | |
9e5f2b29 | 851 | } |
852 | ||
d3372da9 | 853 | int pollsocks(int timeout) |
854 | { | |
72a7835e | 855 | int ret, fd; |
eaa35963 | 856 | socklen_t retlen; |
72a7835e FT |
857 | int newfd, maxfd; |
858 | fd_set rfds, wfds, efds; | |
d3372da9 | 859 | struct socket *sk, *next, *newsk; |
860 | struct sockaddr_storage ss; | |
861 | socklen_t sslen; | |
72a7835e | 862 | struct timeval tv; |
d3372da9 | 863 | |
72a7835e FT |
864 | FD_ZERO(&rfds); |
865 | FD_ZERO(&wfds); | |
866 | FD_ZERO(&efds); | |
867 | for(maxfd = 0, sk = sockets; sk != NULL; sk = sk->next) | |
d3372da9 | 868 | { |
72a7835e | 869 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
d3372da9 | 870 | continue; |
d3372da9 | 871 | if(!sk->ignread) |
72a7835e | 872 | FD_SET(sk->fd, &rfds); |
d3372da9 | 873 | if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0)) |
72a7835e FT |
874 | FD_SET(sk->fd, &wfds); |
875 | FD_SET(sk->fd, &efds); | |
876 | if(sk->fd > maxfd) | |
877 | maxfd = sk->fd; | |
d3372da9 | 878 | } |
72a7835e FT |
879 | tv.tv_sec = timeout / 1000; |
880 | tv.tv_usec = (timeout % 1000) * 1000; | |
881 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
d3372da9 | 882 | if(ret < 0) |
883 | { | |
884 | if(errno != EINTR) | |
885 | { | |
72a7835e | 886 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 887 | /* To avoid CPU hogging in case it's bad, which it |
888 | * probably is. */ | |
889 | sleep(1); | |
890 | } | |
d3372da9 | 891 | return(1); |
892 | } | |
893 | for(sk = sockets; sk != NULL; sk = next) | |
894 | { | |
895 | next = sk->next; | |
72a7835e | 896 | fd = sk->fd; |
d3372da9 | 897 | switch(sk->state) |
898 | { | |
899 | case SOCK_LST: | |
72a7835e | 900 | if(FD_ISSET(fd, &rfds)) |
d3372da9 | 901 | { |
902 | sslen = sizeof(ss); | |
72a7835e | 903 | if((newfd = accept(fd, (struct sockaddr *)&ss, &sslen)) < 0) |
cab0b442 | 904 | { |
905 | if(sk->errcb != NULL) | |
906 | sk->errcb(sk, errno, sk->data); | |
907 | } | |
d3372da9 | 908 | newsk = newsock(sk->type); |
909 | newsk->fd = newfd; | |
910 | newsk->family = sk->family; | |
911 | newsk->state = SOCK_EST; | |
912 | memcpy(newsk->remote = smalloc(sslen), &ss, sslen); | |
913 | newsk->remotelen = sslen; | |
9e5f2b29 | 914 | if(ss.ss_family == PF_UNIX) |
915 | acceptunix(newsk); | |
cab0b442 | 916 | if(sk->acceptcb != NULL) |
917 | sk->acceptcb(sk, newsk, sk->data); | |
9e5f2b29 | 918 | putsock(newsk); |
d3372da9 | 919 | } |
72a7835e | 920 | if(FD_ISSET(fd, &efds)) |
d3372da9 | 921 | { |
922 | retlen = sizeof(ret); | |
72a7835e | 923 | getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 | 924 | if(sk->errcb != NULL) |
925 | sk->errcb(sk, ret, sk->data); | |
d3372da9 | 926 | continue; |
927 | } | |
928 | break; | |
929 | case SOCK_SYN: | |
72a7835e | 930 | if(FD_ISSET(fd, &efds)) |
d3372da9 | 931 | { |
932 | retlen = sizeof(ret); | |
72a7835e | 933 | getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 | 934 | if(sk->conncb != NULL) |
935 | sk->conncb(sk, ret, sk->data); | |
d3372da9 | 936 | closesock(sk); |
937 | continue; | |
938 | } | |
72a7835e | 939 | if(FD_ISSET(fd, &rfds) || FD_ISSET(fd, &wfds)) |
d3372da9 | 940 | { |
941 | sk->state = SOCK_EST; | |
cab0b442 | 942 | if(sk->conncb != NULL) |
943 | sk->conncb(sk, 0, sk->data); | |
d3372da9 | 944 | } |
945 | break; | |
946 | case SOCK_EST: | |
72a7835e | 947 | if(FD_ISSET(fd, &efds)) |
d3372da9 | 948 | { |
949 | retlen = sizeof(ret); | |
72a7835e | 950 | getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
cab0b442 | 951 | if(sk->errcb != NULL) |
952 | sk->errcb(sk, ret, sk->data); | |
d3372da9 | 953 | closesock(sk); |
954 | continue; | |
955 | } | |
72a7835e | 956 | if(FD_ISSET(fd, &rfds)) |
d3372da9 | 957 | sockrecv(sk); |
72a7835e | 958 | if(FD_ISSET(fd, &wfds)) |
d3372da9 | 959 | { |
960 | if(sockqueuesize(sk) > 0) | |
961 | sockflush(sk); | |
962 | } | |
963 | break; | |
964 | } | |
d3372da9 | 965 | } |
d3372da9 | 966 | for(sk = sockets; sk != NULL; sk = next) |
967 | { | |
968 | next = sk->next; | |
969 | if(sk->refcount == 1 && (sockqueuesize(sk) == 0)) | |
970 | { | |
971 | unlinksock(sk); | |
972 | continue; | |
973 | } | |
974 | if(sk->close && (sockqueuesize(sk) == 0)) | |
975 | closesock(sk); | |
976 | if(sk->state == SOCK_STL) | |
977 | { | |
978 | unlinksock(sk); | |
979 | continue; | |
980 | } | |
981 | } | |
982 | return(1); | |
983 | } | |
984 | ||
985 | int socksettos(struct socket *sk, int tos) | |
986 | { | |
b020fb3d | 987 | int buf; |
f966ec56 | 988 | int dscp2tos; |
b020fb3d | 989 | |
7ab36fbd | 990 | if(sk->family == AF_UNIX) |
991 | return(0); /* Unix sockets are always perfect. :) */ | |
d3372da9 | 992 | if(sk->family == AF_INET) |
993 | { | |
f966ec56 | 994 | dscp2tos = confgetint("net", "dscp-tos"); |
b020fb3d | 995 | switch(tos) |
996 | { | |
b198bed6 | 997 | case 0: |
998 | buf = 0; | |
999 | break; | |
b020fb3d | 1000 | case SOCK_TOS_MINCOST: |
f966ec56 FT |
1001 | if(dscp2tos) |
1002 | buf = confgetint("net", "diffserv-mincost") << 2; | |
1003 | else | |
1004 | buf = 0x02; | |
b020fb3d | 1005 | break; |
1006 | case SOCK_TOS_MAXREL: | |
f966ec56 FT |
1007 | if(dscp2tos) |
1008 | buf = confgetint("net", "diffserv-maxrel") << 2; | |
1009 | else | |
1010 | buf = 0x04; | |
b020fb3d | 1011 | break; |
1012 | case SOCK_TOS_MAXTP: | |
f966ec56 FT |
1013 | if(dscp2tos) |
1014 | buf = confgetint("net", "diffserv-maxtp") << 2; | |
1015 | else | |
1016 | buf = 0x08; | |
b020fb3d | 1017 | break; |
1018 | case SOCK_TOS_MINDELAY: | |
f966ec56 FT |
1019 | if(dscp2tos) |
1020 | buf = confgetint("net", "diffserv-mindelay") << 2; | |
1021 | else | |
1022 | buf = 0x10; | |
b020fb3d | 1023 | break; |
1024 | default: | |
1025 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1026 | return(-1); | |
1027 | } | |
e03e1e7c | 1028 | if(setsockopt(sk->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1029 | { |
1030 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1031 | return(-1); | |
1032 | } | |
1033 | return(0); | |
1034 | } | |
b020fb3d | 1035 | if(sk->family == AF_INET6) |
1036 | { | |
1037 | switch(tos) | |
1038 | { | |
b198bed6 | 1039 | case 0: |
1040 | buf = 0; | |
b020fb3d | 1041 | case SOCK_TOS_MINCOST: |
1042 | buf = confgetint("net", "diffserv-mincost"); | |
1043 | break; | |
1044 | case SOCK_TOS_MAXREL: | |
1045 | buf = confgetint("net", "diffserv-maxrel"); | |
1046 | break; | |
1047 | case SOCK_TOS_MAXTP: | |
1048 | buf = confgetint("net", "diffserv-maxtp"); | |
1049 | break; | |
1050 | case SOCK_TOS_MINDELAY: | |
1051 | buf = confgetint("net", "diffserv-mindelay"); | |
1052 | break; | |
1053 | default: | |
1054 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1055 | return(-1); | |
1056 | } | |
1057 | /* | |
1058 | On Linux, the API IPv6 flow label management doesn't seem to | |
1059 | be entirely complete, so I guess this will have to wait. | |
1060 | ||
1061 | if(setsockopt(...) < 0) | |
1062 | { | |
1063 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1064 | return(-1); | |
1065 | } | |
1066 | */ | |
1067 | return(0); | |
1068 | } | |
d3372da9 | 1069 | flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family); |
1070 | return(1); | |
1071 | } | |
1072 | ||
1073 | struct resolvedata | |
1074 | { | |
1075 | int fd; | |
1076 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1077 | void *data; | |
1078 | struct sockaddr_storage addr; | |
1079 | int addrlen; | |
1080 | }; | |
1081 | ||
1082 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1083 | { | |
1084 | static char buf[80]; | |
1085 | int ret; | |
1086 | struct sockaddr_in *ipv4; | |
1087 | ||
1088 | if(!status) | |
1089 | { | |
1090 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1091 | { | |
b4d16e90 | 1092 | errno = ENOENT; |
d3372da9 | 1093 | data->callback(NULL, 0, data->data); |
1094 | } else { | |
1095 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1096 | memcpy(&ipv4->sin_addr, buf, 4); | |
1097 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1098 | } | |
1099 | } else { | |
b4d16e90 | 1100 | errno = ENOENT; |
d3372da9 | 1101 | data->callback(NULL, 0, data->data); |
1102 | } | |
1103 | close(data->fd); | |
1104 | free(data); | |
1105 | } | |
1106 | ||
1107 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1108 | { | |
1109 | int i; | |
1110 | char *p; | |
1111 | int port; | |
1112 | int pfd[2]; | |
1113 | pid_t child; | |
1114 | struct resolvedata *rdata; | |
1115 | struct sockaddr_in ipv4; | |
1116 | struct hostent *he; | |
1117 | sigset_t sigset; | |
1118 | ||
1119 | /* IPv4 */ | |
1120 | port = -1; | |
1121 | if((p = strchr(addr, ':')) != NULL) | |
1122 | { | |
1123 | *p = 0; | |
1124 | port = atoi(p + 1); | |
1125 | } | |
1126 | ipv4.sin_family = AF_INET; | |
1127 | ipv4.sin_port = htons(port); | |
1128 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1129 | { | |
1130 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1131 | } else { | |
1132 | sigemptyset(&sigset); | |
1133 | sigaddset(&sigset, SIGCHLD); | |
1134 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1135 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1136 | { | |
1137 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1138 | return(-1); | |
1139 | } | |
1140 | if(child == 0) | |
1141 | { | |
1142 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1143 | for(i = 3; i < FD_SETSIZE; i++) | |
1144 | { | |
1145 | if(i != pfd[1]) | |
1146 | close(i); | |
1147 | } | |
1148 | signal(SIGALRM, SIG_DFL); | |
1149 | alarm(30); | |
1150 | if((he = gethostbyname(addr)) == NULL) | |
1151 | exit(1); | |
1152 | write(pfd[1], he->h_addr_list[0], 4); | |
1153 | exit(0); | |
1154 | } else { | |
1155 | close(pfd[1]); | |
1156 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1157 | rdata = smalloc(sizeof(*rdata)); | |
1158 | rdata->fd = pfd[0]; | |
1159 | rdata->callback = callback; | |
1160 | rdata->data = data; | |
1161 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1162 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1163 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1164 | return(1); | |
1165 | } | |
1166 | } | |
1167 | return(0); | |
1168 | } | |
1169 | ||
1170 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1171 | { | |
1172 | socklen_t len; | |
1173 | struct sockaddr_storage name; | |
1174 | ||
1175 | *namebuf = NULL; | |
1176 | if((sk->state == SOCK_STL) || (sk->fd < 0)) | |
1177 | return(-1); | |
1178 | len = sizeof(name); | |
1179 | if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0) | |
1180 | { | |
6fb0c6ac | 1181 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1182 | return(-1); |
1183 | } | |
1184 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1185 | if(lenbuf != NULL) |
1186 | *lenbuf = len; | |
d3372da9 | 1187 | return(0); |
1188 | } | |
1189 | ||
eaa35963 | 1190 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1191 | { | |
1192 | if(dst->sa_family != src->sa_family) | |
1193 | { | |
1194 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1195 | return; | |
1196 | } | |
1197 | switch(src->sa_family) | |
1198 | { | |
1199 | case AF_INET: | |
1200 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1201 | break; | |
1202 | case AF_INET6: | |
1203 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1204 | break; | |
1205 | default: | |
1206 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1212 | { |
6fb0c6ac | 1213 | int ret; |
eaa35963 | 1214 | socklen_t plen; |
1215 | struct sockaddr *pname; | |
1216 | ||
1217 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1218 | { | |
1219 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1220 | return(-1); | |
1221 | } | |
1222 | if(ret) | |
1223 | return(0); | |
1224 | sethostaddr(addr, pname); | |
1225 | free(pname); | |
1226 | return(0); | |
1227 | } | |
1228 | ||
1229 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1230 | { | |
d3372da9 | 1231 | socklen_t len; |
6fb0c6ac | 1232 | struct sockaddr *name; |
d3372da9 | 1233 | |
1234 | switch(confgetint("net", "mode")) | |
1235 | { | |
1236 | case 0: | |
1237 | *namebuf = NULL; | |
1238 | if((sk->state == SOCK_STL) || (sk->fd < 0)) | |
d3372da9 | 1239 | { |
eaa35963 | 1240 | errno = EBADF; |
d3372da9 | 1241 | return(-1); |
1242 | } | |
6fb0c6ac | 1243 | if(!sockgetlocalname(sk, &name, &len)) |
1244 | { | |
1245 | *namebuf = name; | |
1246 | *lenbuf = len; | |
eaa35963 | 1247 | makepublic(name); |
6fb0c6ac | 1248 | return(0); |
1249 | } | |
1250 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1251 | return(-1); | |
d3372da9 | 1252 | case 1: |
1253 | errno = EOPNOTSUPP; | |
1254 | return(-1); | |
1255 | default: | |
1256 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1257 | errno = EOPNOTSUPP; | |
1258 | return(-1); | |
1259 | } | |
1260 | } | |
1261 | ||
d29853b1 | 1262 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1263 | { | |
1264 | struct sockaddr *name1, *name2; | |
1265 | socklen_t len1, len2; | |
1266 | ||
1267 | if(sk->family != sk2->family) | |
1268 | { | |
1269 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", sk->family, sk2->family); | |
1270 | return(-1); | |
1271 | } | |
3804379d | 1272 | if(sockgetremotename(sk, &name1, &len1)) |
d29853b1 | 1273 | return(-1); |
3804379d | 1274 | if(sockgetremotename(sk2, &name2, &len2)) { |
d29853b1 | 1275 | free(name1); |
1276 | return(-1); | |
1277 | } | |
1278 | sethostaddr(name1, name2); | |
1279 | free(name2); | |
1280 | *namebuf = name1; | |
1281 | *lenbuf = len1; | |
1282 | return(0); | |
1283 | } | |
1284 | ||
99a28d47 | 1285 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1286 | { | |
1287 | struct sockaddr_un *u1, *u2; | |
1288 | struct sockaddr_in *n1, *n2; | |
1289 | #ifdef HAVE_IPV6 | |
1290 | struct sockaddr_in6 *s1, *s2; | |
1291 | #endif | |
1292 | ||
1293 | if(x->sa_family != y->sa_family) | |
1294 | return(0); | |
1295 | switch(x->sa_family) { | |
1296 | case AF_UNIX: | |
1297 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1298 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1299 | return(0); | |
1300 | break; | |
1301 | case AF_INET: | |
1302 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1303 | if(n1->sin_port != n2->sin_port) | |
1304 | return(0); | |
1305 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1306 | return(0); | |
1307 | break; | |
c8a729d7 | 1308 | #ifdef HAVE_IPV6 |
99a28d47 | 1309 | case AF_INET6: |
1310 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1311 | if(s1->sin6_port != s2->sin6_port) | |
1312 | return(0); | |
1313 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1314 | return(0); | |
1315 | break; | |
c8a729d7 | 1316 | #endif |
99a28d47 | 1317 | } |
1318 | return(1); | |
1319 | } | |
1320 | ||
d3372da9 | 1321 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1322 | { | |
d3372da9 | 1323 | struct sockaddr_in *ipv4; |
1324 | #ifdef HAVE_IPV6 | |
1325 | struct sockaddr_in6 *ipv6; | |
1326 | #endif | |
1327 | static char *ret = NULL; | |
1328 | char buf[1024]; | |
1329 | ||
1330 | if(ret != NULL) | |
1331 | free(ret); | |
1332 | ret = NULL; | |
1333 | switch(arg->sa_family) | |
1334 | { | |
1335 | case AF_UNIX: | |
6a97462e | 1336 | ret = sstrdup("Unix socket"); |
d3372da9 | 1337 | break; |
1338 | case AF_INET: | |
1339 | ipv4 = (struct sockaddr_in *)arg; | |
1340 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1341 | return(NULL); | |
1342 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1343 | break; | |
1344 | #ifdef HAVE_IPV6 | |
1345 | case AF_INET6: | |
1346 | ipv6 = (struct sockaddr_in6 *)arg; | |
1347 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1348 | return(NULL); | |
fc7f7735 | 1349 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1350 | break; |
1351 | #endif | |
1352 | default: | |
1353 | errno = EPFNOSUPPORT; | |
1354 | break; | |
1355 | } | |
1356 | return(ret); | |
1357 | } | |
1358 | ||
1359 | #if 0 | |
1360 | ||
1361 | /* | |
1362 | * It was very nice to use this, but it seems | |
1363 | * to mess things up, so I guess it has to go... :-( | |
1364 | */ | |
1365 | ||
1366 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1367 | { | |
1368 | struct sockaddr *arg; | |
1369 | socklen_t arglen; | |
1370 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1371 | * lowercase letters to 1, so I do this | |
1372 | * instead. */ | |
1373 | struct sockaddr_in *ipv4; | |
1374 | int ret; | |
1375 | ||
1376 | arg = *(struct sockaddr **)(args[0]); | |
1377 | arglen = *(socklen_t *)(args[1]); | |
1378 | switch(arg->sa_family) | |
1379 | { | |
1380 | case AF_UNIX: | |
1381 | UNIX = (struct sockaddr_un *)arg; | |
1382 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1383 | break; | |
1384 | case AF_INET: | |
1385 | ipv4 = (struct sockaddr_in *)arg; | |
1386 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1387 | break; | |
1388 | default: | |
1389 | ret = -1; | |
1390 | errno = EPFNOSUPPORT; | |
1391 | break; | |
1392 | } | |
1393 | return(ret); | |
1394 | } | |
1395 | ||
1396 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1397 | { | |
1398 | if(n > 0) | |
1399 | argtypes[0] = PA_POINTER; | |
1400 | if(n > 1) | |
1401 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1402 | * be an int, so I guess this should be | |
1403 | * safe. */ | |
1404 | return(2); | |
1405 | } | |
1406 | #endif | |
1407 | ||
1408 | static int init(int hup) | |
1409 | { | |
1410 | if(!hup) | |
1411 | { | |
1412 | /* | |
1413 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1414 | { | |
1415 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1416 | return(1); | |
1417 | } | |
1418 | */ | |
1419 | } | |
1420 | return(0); | |
1421 | } | |
1422 | ||
1423 | static void terminate(void) | |
1424 | { | |
1425 | while(sockets != NULL) | |
1426 | unlinksock(sockets); | |
1427 | } | |
1428 | ||
1429 | static struct module me = | |
1430 | { | |
1431 | .name = "net", | |
1432 | .conf = | |
1433 | { | |
1434 | .vars = myvars | |
1435 | }, | |
1436 | .init = init, | |
1437 | .terminate = terminate | |
1438 | }; | |
1439 | ||
1440 | MODULE(me) |