| | 1 | /* |
| | 2 | * Dolda Connect - Modular multiuser Direct Connect-style client |
| | 3 | * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com) |
| | 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> |
| | 31 | #include <sys/poll.h> |
| | 32 | #include <arpa/inet.h> |
| | 33 | #include <netinet/in.h> |
| | 34 | #include <netdb.h> |
| | 35 | #include <sys/signal.h> |
| | 36 | #ifdef HAVE_LINUX_SOCKIOS_H |
| | 37 | #include <linux/sockios.h> |
| | 38 | #endif |
| | 39 | #include <errno.h> |
| | 40 | #include <net/if.h> |
| | 41 | |
| | 42 | #include "conf.h" |
| | 43 | #include "net.h" |
| | 44 | #include "module.h" |
| | 45 | #include "log.h" |
| | 46 | #include "utils.h" |
| | 47 | #include "sysevents.h" |
| | 48 | |
| | 49 | static struct configvar myvars[] = |
| | 50 | { |
| | 51 | /* 0 = Direct mode, 1 = Passive mode, 2 = SOCKS proxy */ |
| | 52 | {CONF_VAR_INT, "mode", {.num = 0}}, |
| | 53 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
| | 54 | /* Only for direct mode */ |
| | 55 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
| | 56 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
| | 57 | /* Diffserv should be supported on IPv4, too, but I don't know the |
| | 58 | * API to do that. */ |
| | 59 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
| | 60 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
| | 61 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
| | 62 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
| | 63 | {CONF_VAR_END} |
| | 64 | }; |
| | 65 | |
| | 66 | static struct socket *sockets = NULL; |
| | 67 | int numsocks = 0; |
| | 68 | |
| | 69 | /* XXX: Get autoconf for all this... */ |
| | 70 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) |
| | 71 | { |
| | 72 | struct sockaddr_in *ipv4; |
| | 73 | struct configvar *var; |
| | 74 | void *bufend; |
| | 75 | int sock; |
| | 76 | struct ifconf conf; |
| | 77 | struct ifreq *ifr, req; |
| | 78 | char *pif; |
| | 79 | |
| | 80 | if(af == AF_INET) |
| | 81 | { |
| | 82 | var = confgetvar("net", "visibleipv4"); |
| | 83 | if(var->val.ipv4.s_addr != 0) |
| | 84 | { |
| | 85 | ipv4 = smalloc(sizeof(*ipv4)); |
| | 86 | ipv4->sin_family = AF_INET; |
| | 87 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; |
| | 88 | *addr = (struct sockaddr *)ipv4; |
| | 89 | *lenbuf = sizeof(*ipv4); |
| | 90 | return(0); |
| | 91 | } |
| | 92 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
| | 93 | { |
| | 94 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); |
| | 95 | return(-1); |
| | 96 | } |
| | 97 | if(!strcmp(pif, "")) |
| | 98 | return(1); |
| | 99 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
| | 100 | return(-1); |
| | 101 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); |
| | 102 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) |
| | 103 | { |
| | 104 | free(conf.ifc_buf); |
| | 105 | close(sock); |
| | 106 | return(-1); |
| | 107 | } |
| | 108 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; |
| | 109 | ipv4 = NULL; |
| | 110 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) |
| | 111 | { |
| | 112 | if(strcmp(ifr->ifr_name, pif)) |
| | 113 | continue; |
| | 114 | memset(&req, 0, sizeof(req)); |
| | 115 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); |
| | 116 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) |
| | 117 | break; |
| | 118 | if(!(req.ifr_flags & IFF_UP)) |
| | 119 | { |
| | 120 | flog(LOG_WARNING, "public interface is down"); |
| | 121 | break; |
| | 122 | } |
| | 123 | if(ifr->ifr_addr.sa_family != AF_INET) |
| | 124 | { |
| | 125 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
| | 126 | break; |
| | 127 | } |
| | 128 | ipv4 = smalloc(sizeof(*ipv4)); |
| | 129 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); |
| | 130 | break; |
| | 131 | } |
| | 132 | free(conf.ifc_buf); |
| | 133 | close(sock); |
| | 134 | if(ipv4 != NULL) |
| | 135 | { |
| | 136 | *addr = (struct sockaddr *)ipv4; |
| | 137 | *lenbuf = sizeof(*ipv4); |
| | 138 | return(0); |
| | 139 | } |
| | 140 | errno = ENETDOWN; |
| | 141 | return(-1); |
| | 142 | } |
| | 143 | return(1); |
| | 144 | } |
| | 145 | |
| | 146 | static struct socket *newsock(int type) |
| | 147 | { |
| | 148 | struct socket *new; |
| | 149 | |
| | 150 | new = smalloc(sizeof(*new)); |
| | 151 | new->refcount = 2; |
| | 152 | new->fd = -1; |
| | 153 | new->isrealsocket = 1; |
| | 154 | new->family = -1; |
| | 155 | new->tos = 0; |
| | 156 | new->type = type; |
| | 157 | new->state = -1; |
| | 158 | new->ignread = 0; |
| | 159 | new->close = 0; |
| | 160 | new->remote = NULL; |
| | 161 | new->remotelen = 0; |
| | 162 | switch(type) |
| | 163 | { |
| | 164 | case SOCK_STREAM: |
| | 165 | new->outbuf.s.buf = NULL; |
| | 166 | new->outbuf.s.bufsize = 0; |
| | 167 | new->outbuf.s.datasize = 0; |
| | 168 | new->inbuf.s.buf = NULL; |
| | 169 | new->inbuf.s.bufsize = 0; |
| | 170 | new->inbuf.s.datasize = 0; |
| | 171 | break; |
| | 172 | case SOCK_DGRAM: |
| | 173 | new->outbuf.d.f = new->outbuf.d.l = NULL; |
| | 174 | new->inbuf.d.f = new->inbuf.d.l = NULL; |
| | 175 | break; |
| | 176 | } |
| | 177 | new->conncb = NULL; |
| | 178 | new->errcb = NULL; |
| | 179 | new->readcb = NULL; |
| | 180 | new->writecb = NULL; |
| | 181 | new->acceptcb = NULL; |
| | 182 | new->next = sockets; |
| | 183 | new->prev = NULL; |
| | 184 | if(sockets != NULL) |
| | 185 | sockets->prev = new; |
| | 186 | sockets = new; |
| | 187 | numsocks++; |
| | 188 | return(new); |
| | 189 | } |
| | 190 | |
| | 191 | static struct socket *mksock(int domain, int type) |
| | 192 | { |
| | 193 | int fd; |
| | 194 | struct socket *new; |
| | 195 | |
| | 196 | if((fd = socket(domain, type, 0)) < 0) |
| | 197 | { |
| | 198 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); |
| | 199 | return(NULL); |
| | 200 | } |
| | 201 | new = newsock(type); |
| | 202 | new->fd = fd; |
| | 203 | new->family = domain; |
| | 204 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
| | 205 | return(new); |
| | 206 | } |
| | 207 | |
| | 208 | struct socket *wrapsock(int fd) |
| | 209 | { |
| | 210 | struct socket *new; |
| | 211 | |
| | 212 | new = newsock(SOCK_STREAM); |
| | 213 | new->fd = fd; |
| | 214 | new->state = SOCK_EST; |
| | 215 | new->isrealsocket = 0; |
| | 216 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
| | 217 | return(new); |
| | 218 | } |
| | 219 | |
| | 220 | static void unlinksock(struct socket *sk) |
| | 221 | { |
| | 222 | if(sk->prev != NULL) |
| | 223 | sk->prev->next = sk->next; |
| | 224 | if(sk->next != NULL) |
| | 225 | sk->next->prev = sk->prev; |
| | 226 | if(sk == sockets) |
| | 227 | sockets = sk->next; |
| | 228 | putsock(sk); |
| | 229 | numsocks--; |
| | 230 | } |
| | 231 | |
| | 232 | void getsock(struct socket *sk) |
| | 233 | { |
| | 234 | sk->refcount++; |
| | 235 | } |
| | 236 | |
| | 237 | void putsock(struct socket *sk) |
| | 238 | { |
| | 239 | struct dgrambuf *buf; |
| | 240 | |
| | 241 | if(--(sk->refcount) == 0) |
| | 242 | { |
| | 243 | switch(sk->type) |
| | 244 | { |
| | 245 | case SOCK_STREAM: |
| | 246 | if(sk->outbuf.s.buf != NULL) |
| | 247 | free(sk->outbuf.s.buf); |
| | 248 | if(sk->inbuf.s.buf != NULL) |
| | 249 | free(sk->inbuf.s.buf); |
| | 250 | break; |
| | 251 | case SOCK_DGRAM: |
| | 252 | while((buf = sk->outbuf.d.f) != NULL) |
| | 253 | { |
| | 254 | sk->outbuf.d.f = buf->next; |
| | 255 | free(buf->data); |
| | 256 | free(buf); |
| | 257 | } |
| | 258 | while((buf = sk->inbuf.d.f) != NULL) |
| | 259 | { |
| | 260 | sk->inbuf.d.f = buf->next; |
| | 261 | free(buf->data); |
| | 262 | free(buf); |
| | 263 | } |
| | 264 | break; |
| | 265 | } |
| | 266 | if(sk->fd >= 0) |
| | 267 | close(sk->fd); |
| | 268 | if(sk->remote != NULL) |
| | 269 | free(sk->remote); |
| | 270 | free(sk); |
| | 271 | } |
| | 272 | } |
| | 273 | |
| | 274 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
| | 275 | { |
| | 276 | switch(sk->type) |
| | 277 | { |
| | 278 | case SOCK_STREAM: |
| | 279 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + size, 1, 1); |
| | 280 | memmove(sk->inbuf.s.buf + size, sk->inbuf.s.buf, sk->inbuf.s.datasize); |
| | 281 | memcpy(sk->inbuf.s.buf, buf, size); |
| | 282 | sk->inbuf.s.datasize += size; |
| | 283 | break; |
| | 284 | case SOCK_DGRAM: |
| | 285 | /* XXX */ |
| | 286 | break; |
| | 287 | } |
| | 288 | return; |
| | 289 | } |
| | 290 | |
| | 291 | void *sockgetinbuf(struct socket *sk, size_t *size) |
| | 292 | { |
| | 293 | void *buf; |
| | 294 | struct dgrambuf *dbuf; |
| | 295 | |
| | 296 | switch(sk->type) |
| | 297 | { |
| | 298 | case SOCK_STREAM: |
| | 299 | if((sk->inbuf.s.buf == NULL) || (sk->inbuf.s.datasize == 0)) |
| | 300 | { |
| | 301 | *size = 0; |
| | 302 | return(NULL); |
| | 303 | } |
| | 304 | buf = sk->inbuf.s.buf; |
| | 305 | *size = sk->inbuf.s.datasize; |
| | 306 | sk->inbuf.s.buf = NULL; |
| | 307 | sk->inbuf.s.bufsize = sk->inbuf.s.datasize = 0; |
| | 308 | return(buf); |
| | 309 | case SOCK_DGRAM: |
| | 310 | if((dbuf = sk->inbuf.d.f) == NULL) |
| | 311 | return(NULL); |
| | 312 | sk->inbuf.d.f = dbuf->next; |
| | 313 | if(dbuf->next == NULL) |
| | 314 | sk->inbuf.d.l = NULL; |
| | 315 | buf = dbuf->data; |
| | 316 | *size = dbuf->size; |
| | 317 | free(dbuf->addr); |
| | 318 | free(dbuf); |
| | 319 | return(buf); |
| | 320 | } |
| | 321 | return(NULL); |
| | 322 | } |
| | 323 | |
| | 324 | static void sockrecv(struct socket *sk) |
| | 325 | { |
| | 326 | int ret, inq; |
| | 327 | struct dgrambuf *dbuf; |
| | 328 | |
| | 329 | switch(sk->type) |
| | 330 | { |
| | 331 | case SOCK_STREAM: |
| | 332 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
| | 333 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea |
| | 334 | * how to read the inqueue size on other OSs */ |
| | 335 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
| | 336 | { |
| | 337 | /* I don't really know what could go wrong here, so let's |
| | 338 | * assume it's transient. */ |
| | 339 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), sk->fd); |
| | 340 | inq = 2048; |
| | 341 | } |
| | 342 | #else |
| | 343 | inq = 2048; |
| | 344 | #endif |
| | 345 | if(inq > 65536) |
| | 346 | inq = 65536; |
| | 347 | sizebuf(&sk->inbuf.s.buf, &sk->inbuf.s.bufsize, sk->inbuf.s.datasize + inq, 1, 1); |
| | 348 | ret = read(sk->fd, sk->inbuf.s.buf + sk->inbuf.s.datasize, inq); |
| | 349 | if(ret < 0) |
| | 350 | { |
| | 351 | if((errno == EINTR) || (errno == EAGAIN)) |
| | 352 | return; |
| | 353 | if(sk->errcb != NULL) |
| | 354 | sk->errcb(sk, errno, sk->data); |
| | 355 | closesock(sk); |
| | 356 | return; |
| | 357 | } |
| | 358 | if(ret == 0) |
| | 359 | { |
| | 360 | if(sk->errcb != NULL) |
| | 361 | sk->errcb(sk, 0, sk->data); |
| | 362 | closesock(sk); |
| | 363 | return; |
| | 364 | } |
| | 365 | sk->inbuf.s.datasize += ret; |
| | 366 | if(sk->readcb != NULL) |
| | 367 | sk->readcb(sk, sk->data); |
| | 368 | break; |
| | 369 | case SOCK_DGRAM: |
| | 370 | if(ioctl(sk->fd, SIOCINQ, &inq)) |
| | 371 | { |
| | 372 | /* I don't really know what could go wrong here, so let's |
| | 373 | * assume it's transient. */ |
| | 374 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), sk->fd); |
| | 375 | return; |
| | 376 | } |
| | 377 | dbuf = smalloc(sizeof(*dbuf)); |
| | 378 | dbuf->data = smalloc(inq); |
| | 379 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); |
| | 380 | ret = recvfrom(sk->fd, dbuf->data, inq, 0, dbuf->addr, &dbuf->addrlen); |
| | 381 | if(ret < 0) |
| | 382 | { |
| | 383 | free(dbuf->addr); |
| | 384 | free(dbuf->data); |
| | 385 | free(dbuf); |
| | 386 | if((errno == EINTR) || (errno == EAGAIN)) |
| | 387 | return; |
| | 388 | if(sk->errcb != NULL) |
| | 389 | sk->errcb(sk, errno, sk->data); |
| | 390 | closesock(sk); |
| | 391 | return; |
| | 392 | } |
| | 393 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
| | 394 | * have EOF), but rather an empty packet. I don't know if any |
| | 395 | * other potential DGRAM protocols might have an EOF |
| | 396 | * condition, so let's play safe. */ |
| | 397 | if(ret == 0) |
| | 398 | { |
| | 399 | free(dbuf->addr); |
| | 400 | free(dbuf->data); |
| | 401 | free(dbuf); |
| | 402 | if(!((sk->family == AF_INET) || (sk->family == AF_INET6))) |
| | 403 | { |
| | 404 | if(sk->errcb != NULL) |
| | 405 | sk->errcb(sk, 0, sk->data); |
| | 406 | closesock(sk); |
| | 407 | } |
| | 408 | return; |
| | 409 | } |
| | 410 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); |
| | 411 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); |
| | 412 | dbuf->next = NULL; |
| | 413 | if(sk->inbuf.d.l != NULL) |
| | 414 | sk->inbuf.d.l->next = dbuf; |
| | 415 | else |
| | 416 | sk->inbuf.d.f = dbuf; |
| | 417 | sk->inbuf.d.l = dbuf; |
| | 418 | if(sk->readcb != NULL) |
| | 419 | sk->readcb(sk, sk->data); |
| | 420 | break; |
| | 421 | } |
| | 422 | } |
| | 423 | |
| | 424 | static void sockflush(struct socket *sk) |
| | 425 | { |
| | 426 | int ret; |
| | 427 | struct dgrambuf *dbuf; |
| | 428 | |
| | 429 | switch(sk->type) |
| | 430 | { |
| | 431 | case SOCK_STREAM: |
| | 432 | if(sk->isrealsocket) |
| | 433 | ret = send(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); |
| | 434 | else |
| | 435 | ret = write(sk->fd, sk->outbuf.s.buf, sk->outbuf.s.datasize); |
| | 436 | if(ret < 0) |
| | 437 | { |
| | 438 | /* For now, assume transient error, since |
| | 439 | * the socket is polled for errors */ |
| | 440 | break; |
| | 441 | } |
| | 442 | if(ret > 0) |
| | 443 | { |
| | 444 | memmove(sk->outbuf.s.buf, ((char *)sk->outbuf.s.buf) + ret, sk->outbuf.s.datasize -= ret); |
| | 445 | if(sk->writecb != NULL) |
| | 446 | sk->writecb(sk, sk->data); |
| | 447 | } |
| | 448 | break; |
| | 449 | case SOCK_DGRAM: |
| | 450 | dbuf = sk->outbuf.d.f; |
| | 451 | if((sk->outbuf.d.f = dbuf->next) == NULL) |
| | 452 | sk->outbuf.d.l = NULL; |
| | 453 | sendto(sk->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); |
| | 454 | free(dbuf->data); |
| | 455 | free(dbuf->addr); |
| | 456 | free(dbuf); |
| | 457 | if(sk->writecb != NULL) |
| | 458 | sk->writecb(sk, sk->data); |
| | 459 | break; |
| | 460 | } |
| | 461 | } |
| | 462 | |
| | 463 | void closesock(struct socket *sk) |
| | 464 | { |
| | 465 | sk->state = SOCK_STL; |
| | 466 | close(sk->fd); |
| | 467 | sk->fd = -1; |
| | 468 | sk->close = 0; |
| | 469 | } |
| | 470 | |
| | 471 | void sockqueue(struct socket *sk, void *data, size_t size) |
| | 472 | { |
| | 473 | struct dgrambuf *new; |
| | 474 | |
| | 475 | if(sk->state == SOCK_STL) |
| | 476 | return; |
| | 477 | switch(sk->type) |
| | 478 | { |
| | 479 | case SOCK_STREAM: |
| | 480 | sizebuf(&(sk->outbuf.s.buf), &(sk->outbuf.s.bufsize), sk->outbuf.s.datasize + size, 1, 1); |
| | 481 | memcpy(sk->outbuf.s.buf + sk->outbuf.s.datasize, data, size); |
| | 482 | sk->outbuf.s.datasize += size; |
| | 483 | break; |
| | 484 | case SOCK_DGRAM: |
| | 485 | if(sk->remote == NULL) |
| | 486 | return; |
| | 487 | new = smalloc(sizeof(*new)); |
| | 488 | new->next = NULL; |
| | 489 | memcpy(new->data = smalloc(size), data, new->size = size); |
| | 490 | memcpy(new->addr = smalloc(sk->remotelen), sk->remote, new->addrlen = sk->remotelen); |
| | 491 | if(sk->outbuf.d.l == NULL) |
| | 492 | { |
| | 493 | sk->outbuf.d.l = sk->outbuf.d.f = new; |
| | 494 | } else { |
| | 495 | sk->outbuf.d.l->next = new; |
| | 496 | sk->outbuf.d.l = new; |
| | 497 | } |
| | 498 | break; |
| | 499 | } |
| | 500 | } |
| | 501 | |
| | 502 | size_t sockgetdatalen(struct socket *sk) |
| | 503 | { |
| | 504 | struct dgrambuf *b; |
| | 505 | size_t ret; |
| | 506 | |
| | 507 | switch(sk->type) |
| | 508 | { |
| | 509 | case SOCK_STREAM: |
| | 510 | ret = sk->inbuf.s.datasize; |
| | 511 | break; |
| | 512 | case SOCK_DGRAM: |
| | 513 | ret = 0; |
| | 514 | for(b = sk->inbuf.d.f; b != NULL; b = b->next) |
| | 515 | ret += b->size; |
| | 516 | break; |
| | 517 | } |
| | 518 | return(ret); |
| | 519 | } |
| | 520 | |
| | 521 | size_t sockqueuesize(struct socket *sk) |
| | 522 | { |
| | 523 | struct dgrambuf *b; |
| | 524 | size_t ret; |
| | 525 | |
| | 526 | switch(sk->type) |
| | 527 | { |
| | 528 | case SOCK_STREAM: |
| | 529 | ret = sk->outbuf.s.datasize; |
| | 530 | break; |
| | 531 | case SOCK_DGRAM: |
| | 532 | ret = 0; |
| | 533 | for(b = sk->outbuf.d.f; b != NULL; b = b->next) |
| | 534 | ret += b->size; |
| | 535 | break; |
| | 536 | } |
| | 537 | return(ret); |
| | 538 | } |
| | 539 | |
| | 540 | /* |
| | 541 | * The difference between netcslisten() and netcslistenlocal() is that |
| | 542 | * netcslistenlocal() always listens on the local host, instead of |
| | 543 | * following proxy/passive mode directions. It is suitable for eg. the |
| | 544 | * UI channel, while the file sharing networks should, naturally, use |
| | 545 | * netcslisten() instead. |
| | 546 | */ |
| | 547 | |
| | 548 | struct socket *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
| | 549 | { |
| | 550 | struct socket *sk; |
| | 551 | int intbuf; |
| | 552 | |
| | 553 | /* I don't know if this is actually correct (it probably isn't), |
| | 554 | * but since, at on least Linux systems, PF_* are specifically |
| | 555 | * #define'd to their AF_* counterparts, it allows for a severely |
| | 556 | * smoother implementation. If it breaks something on your |
| | 557 | * platform, please tell me so. |
| | 558 | */ |
| | 559 | if((sk = mksock(name->sa_family, type)) == NULL) |
| | 560 | return(NULL); |
| | 561 | sk->state = SOCK_LST; |
| | 562 | if(confgetint("net", "reuseaddr")) |
| | 563 | { |
| | 564 | intbuf = 1; |
| | 565 | setsockopt(sk->fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
| | 566 | } |
| | 567 | if(bind(sk->fd, name, namelen) < 0) |
| | 568 | { |
| | 569 | putsock(sk); |
| | 570 | return(NULL); |
| | 571 | } |
| | 572 | if(listen(sk->fd, 16) < 0) |
| | 573 | { |
| | 574 | putsock(sk); |
| | 575 | return(NULL); |
| | 576 | } |
| | 577 | sk->acceptcb = func; |
| | 578 | sk->data = data; |
| | 579 | return(sk); |
| | 580 | } |
| | 581 | |
| | 582 | struct socket *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct socket *, struct socket *, void *), void *data) |
| | 583 | { |
| | 584 | if(confgetint("net", "mode") == 1) |
| | 585 | { |
| | 586 | errno = EOPNOTSUPP; |
| | 587 | return(NULL); |
| | 588 | } |
| | 589 | if(confgetint("net", "mode") == 0) |
| | 590 | return(netcslistenlocal(type, name, namelen, func, data)); |
| | 591 | errno = EOPNOTSUPP; |
| | 592 | return(NULL); |
| | 593 | } |
| | 594 | |
| | 595 | struct socket *netcstcplisten(int port, int local, void (*func)(struct socket *, struct socket *, void *), void *data) |
| | 596 | { |
| | 597 | struct sockaddr_in addr; |
| | 598 | #ifdef HAVE_IPV6 |
| | 599 | struct sockaddr_in6 addr6; |
| | 600 | #endif |
| | 601 | struct socket *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct socket *, struct socket *, void *), void *); |
| | 602 | struct socket *ret; |
| | 603 | |
| | 604 | if(local) |
| | 605 | csfunc = netcslistenlocal; |
| | 606 | else |
| | 607 | csfunc = netcslisten; |
| | 608 | #ifdef HAVE_IPV6 |
| | 609 | memset(&addr6, 0, sizeof(addr6)); |
| | 610 | addr6.sin6_family = AF_INET6; |
| | 611 | addr6.sin6_port = htons(port); |
| | 612 | addr6.sin6_addr = in6addr_any; |
| | 613 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) |
| | 614 | return(ret); |
| | 615 | if((ret == NULL) && (errno != EAFNOSUPPORT)) |
| | 616 | return(NULL); |
| | 617 | #endif |
| | 618 | memset(&addr, 0, sizeof(addr)); |
| | 619 | addr.sin_family = AF_INET; |
| | 620 | addr.sin_port = htons(port); |
| | 621 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); |
| | 622 | } |
| | 623 | |
| | 624 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
| | 625 | { |
| | 626 | struct socket *sk; |
| | 627 | int mode; |
| | 628 | |
| | 629 | mode = confgetint("net", "mode"); |
| | 630 | if((mode == 0) || (mode == 1)) |
| | 631 | { |
| | 632 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) |
| | 633 | return(NULL); |
| | 634 | if(bind(sk->fd, name, namelen) < 0) |
| | 635 | { |
| | 636 | putsock(sk); |
| | 637 | return(NULL); |
| | 638 | } |
| | 639 | sk->state = SOCK_EST; |
| | 640 | return(sk); |
| | 641 | } |
| | 642 | errno = EOPNOTSUPP; |
| | 643 | return(NULL); |
| | 644 | } |
| | 645 | |
| | 646 | struct socket *netdupsock(struct socket *sk) |
| | 647 | { |
| | 648 | struct socket *newsk; |
| | 649 | |
| | 650 | newsk = newsock(sk->type); |
| | 651 | if((newsk->fd = dup(sk->fd)) < 0) |
| | 652 | { |
| | 653 | flog(LOG_WARNING, "could not dup() socket: %s", strerror(errno)); |
| | 654 | putsock(newsk); |
| | 655 | return(NULL); |
| | 656 | } |
| | 657 | newsk->state = sk->state; |
| | 658 | newsk->ignread = sk->ignread; |
| | 659 | if(sk->remote != NULL) |
| | 660 | memcpy(newsk->remote = smalloc(sk->remotelen), sk->remote, newsk->remotelen = sk->remotelen); |
| | 661 | return(newsk); |
| | 662 | } |
| | 663 | |
| | 664 | void netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
| | 665 | { |
| | 666 | if(sk->remote != NULL) |
| | 667 | free(sk->remote); |
| | 668 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
| | 669 | sk->ignread = 1; |
| | 670 | } |
| | 671 | |
| | 672 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
| | 673 | { |
| | 674 | struct socket *sk; |
| | 675 | int mode; |
| | 676 | |
| | 677 | mode = confgetint("net", "mode"); |
| | 678 | if((mode == 0) || (mode == 1)) |
| | 679 | { |
| | 680 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) |
| | 681 | return(NULL); |
| | 682 | memcpy(sk->remote = smalloc(addrlen), addr, sk->remotelen = addrlen); |
| | 683 | if(!connect(sk->fd, addr, addrlen)) |
| | 684 | { |
| | 685 | sk->state = SOCK_EST; |
| | 686 | func(sk, 0, data); |
| | 687 | return(sk); |
| | 688 | } |
| | 689 | if(errno == EINPROGRESS) |
| | 690 | { |
| | 691 | sk->state = SOCK_SYN; |
| | 692 | sk->conncb = func; |
| | 693 | sk->data = data; |
| | 694 | return(sk); |
| | 695 | } |
| | 696 | putsock(sk); |
| | 697 | return(NULL); |
| | 698 | } |
| | 699 | errno = EOPNOTSUPP; |
| | 700 | return(NULL); |
| | 701 | } |
| | 702 | |
| | 703 | int pollsocks(int timeout) |
| | 704 | { |
| | 705 | int i, num, ret; |
| | 706 | socklen_t retlen; |
| | 707 | int newfd; |
| | 708 | struct pollfd *pfds; |
| | 709 | struct socket *sk, *next, *newsk; |
| | 710 | struct sockaddr_storage ss; |
| | 711 | socklen_t sslen; |
| | 712 | |
| | 713 | pfds = smalloc(sizeof(*pfds) * (num = numsocks)); |
| | 714 | for(i = 0, sk = sockets; i < num; sk = sk->next) |
| | 715 | { |
| | 716 | if(sk->state == SOCK_STL) |
| | 717 | { |
| | 718 | num--; |
| | 719 | continue; |
| | 720 | } |
| | 721 | pfds[i].fd = sk->fd; |
| | 722 | pfds[i].events = 0; |
| | 723 | if(!sk->ignread) |
| | 724 | pfds[i].events |= POLLIN; |
| | 725 | if((sk->state == SOCK_SYN) || (sockqueuesize(sk) > 0)) |
| | 726 | pfds[i].events |= POLLOUT; |
| | 727 | pfds[i].revents = 0; |
| | 728 | i++; |
| | 729 | } |
| | 730 | ret = poll(pfds, num, timeout); |
| | 731 | if(ret < 0) |
| | 732 | { |
| | 733 | if(errno != EINTR) |
| | 734 | { |
| | 735 | flog(LOG_CRIT, "pollsocks: poll errored out: %s", strerror(errno)); |
| | 736 | /* To avoid CPU hogging in case it's bad, which it |
| | 737 | * probably is. */ |
| | 738 | sleep(1); |
| | 739 | } |
| | 740 | free(pfds); |
| | 741 | return(1); |
| | 742 | } |
| | 743 | for(sk = sockets; sk != NULL; sk = next) |
| | 744 | { |
| | 745 | next = sk->next; |
| | 746 | for(i = 0; i < num; i++) |
| | 747 | { |
| | 748 | if(pfds[i].fd == sk->fd) |
| | 749 | break; |
| | 750 | } |
| | 751 | if(i == num) |
| | 752 | continue; |
| | 753 | switch(sk->state) |
| | 754 | { |
| | 755 | case SOCK_LST: |
| | 756 | if(pfds[i].revents & POLLIN) |
| | 757 | { |
| | 758 | sslen = sizeof(ss); |
| | 759 | if((newfd = accept(sk->fd, (struct sockaddr *)&ss, &sslen)) < 0) |
| | 760 | { |
| | 761 | if(sk->errcb != NULL) |
| | 762 | sk->errcb(sk, errno, sk->data); |
| | 763 | } |
| | 764 | newsk = newsock(sk->type); |
| | 765 | newsk->fd = newfd; |
| | 766 | newsk->family = sk->family; |
| | 767 | newsk->state = SOCK_EST; |
| | 768 | memcpy(newsk->remote = smalloc(sslen), &ss, sslen); |
| | 769 | newsk->remotelen = sslen; |
| | 770 | putsock(newsk); |
| | 771 | if(sk->acceptcb != NULL) |
| | 772 | sk->acceptcb(sk, newsk, sk->data); |
| | 773 | } |
| | 774 | if(pfds[i].revents & POLLERR) |
| | 775 | { |
| | 776 | retlen = sizeof(ret); |
| | 777 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
| | 778 | if(sk->errcb != NULL) |
| | 779 | sk->errcb(sk, ret, sk->data); |
| | 780 | continue; |
| | 781 | } |
| | 782 | break; |
| | 783 | case SOCK_SYN: |
| | 784 | if(pfds[i].revents & POLLERR) |
| | 785 | { |
| | 786 | retlen = sizeof(ret); |
| | 787 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
| | 788 | if(sk->conncb != NULL) |
| | 789 | sk->conncb(sk, ret, sk->data); |
| | 790 | closesock(sk); |
| | 791 | continue; |
| | 792 | } |
| | 793 | if(pfds[i].revents & (POLLIN | POLLOUT)) |
| | 794 | { |
| | 795 | sk->state = SOCK_EST; |
| | 796 | if(sk->conncb != NULL) |
| | 797 | sk->conncb(sk, 0, sk->data); |
| | 798 | } |
| | 799 | break; |
| | 800 | case SOCK_EST: |
| | 801 | if(pfds[i].revents & POLLERR) |
| | 802 | { |
| | 803 | retlen = sizeof(ret); |
| | 804 | getsockopt(sk->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
| | 805 | if(sk->errcb != NULL) |
| | 806 | sk->errcb(sk, ret, sk->data); |
| | 807 | closesock(sk); |
| | 808 | continue; |
| | 809 | } |
| | 810 | if(pfds[i].revents & POLLIN) |
| | 811 | sockrecv(sk); |
| | 812 | if(pfds[i].revents & POLLOUT) |
| | 813 | { |
| | 814 | if(sockqueuesize(sk) > 0) |
| | 815 | sockflush(sk); |
| | 816 | } |
| | 817 | break; |
| | 818 | } |
| | 819 | if(pfds[i].revents & POLLNVAL) |
| | 820 | { |
| | 821 | flog(LOG_CRIT, "BUG: stale socket struct on fd %i", sk->fd); |
| | 822 | sk->state = SOCK_STL; |
| | 823 | unlinksock(sk); |
| | 824 | continue; |
| | 825 | } |
| | 826 | if(pfds[i].revents & POLLHUP) |
| | 827 | { |
| | 828 | if(sk->errcb != NULL) |
| | 829 | sk->errcb(sk, 0, sk->data); |
| | 830 | closesock(sk); |
| | 831 | unlinksock(sk); |
| | 832 | continue; |
| | 833 | } |
| | 834 | } |
| | 835 | free(pfds); |
| | 836 | for(sk = sockets; sk != NULL; sk = next) |
| | 837 | { |
| | 838 | next = sk->next; |
| | 839 | if(sk->refcount == 1 && (sockqueuesize(sk) == 0)) |
| | 840 | { |
| | 841 | unlinksock(sk); |
| | 842 | continue; |
| | 843 | } |
| | 844 | if(sk->close && (sockqueuesize(sk) == 0)) |
| | 845 | closesock(sk); |
| | 846 | if(sk->state == SOCK_STL) |
| | 847 | { |
| | 848 | unlinksock(sk); |
| | 849 | continue; |
| | 850 | } |
| | 851 | } |
| | 852 | return(1); |
| | 853 | } |
| | 854 | |
| | 855 | int socksettos(struct socket *sk, int tos) |
| | 856 | { |
| | 857 | int buf; |
| | 858 | |
| | 859 | if(sk->family == AF_INET) |
| | 860 | { |
| | 861 | switch(tos) |
| | 862 | { |
| | 863 | case 0: |
| | 864 | buf = 0; |
| | 865 | break; |
| | 866 | case SOCK_TOS_MINCOST: |
| | 867 | buf = 0x02; |
| | 868 | break; |
| | 869 | case SOCK_TOS_MAXREL: |
| | 870 | buf = 0x04; |
| | 871 | break; |
| | 872 | case SOCK_TOS_MAXTP: |
| | 873 | buf = 0x08; |
| | 874 | break; |
| | 875 | case SOCK_TOS_MINDELAY: |
| | 876 | buf = 0x10; |
| | 877 | break; |
| | 878 | default: |
| | 879 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
| | 880 | return(-1); |
| | 881 | } |
| | 882 | if(setsockopt(sk->fd, SOL_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
| | 883 | { |
| | 884 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); |
| | 885 | return(-1); |
| | 886 | } |
| | 887 | return(0); |
| | 888 | } |
| | 889 | if(sk->family == AF_INET6) |
| | 890 | { |
| | 891 | switch(tos) |
| | 892 | { |
| | 893 | case 0: |
| | 894 | buf = 0; |
| | 895 | case SOCK_TOS_MINCOST: |
| | 896 | buf = confgetint("net", "diffserv-mincost"); |
| | 897 | break; |
| | 898 | case SOCK_TOS_MAXREL: |
| | 899 | buf = confgetint("net", "diffserv-maxrel"); |
| | 900 | break; |
| | 901 | case SOCK_TOS_MAXTP: |
| | 902 | buf = confgetint("net", "diffserv-maxtp"); |
| | 903 | break; |
| | 904 | case SOCK_TOS_MINDELAY: |
| | 905 | buf = confgetint("net", "diffserv-mindelay"); |
| | 906 | break; |
| | 907 | default: |
| | 908 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
| | 909 | return(-1); |
| | 910 | } |
| | 911 | /* |
| | 912 | On Linux, the API IPv6 flow label management doesn't seem to |
| | 913 | be entirely complete, so I guess this will have to wait. |
| | 914 | |
| | 915 | if(setsockopt(...) < 0) |
| | 916 | { |
| | 917 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); |
| | 918 | return(-1); |
| | 919 | } |
| | 920 | */ |
| | 921 | return(0); |
| | 922 | } |
| | 923 | flog(LOG_WARNING, "could not set TOS on sock of family %i", sk->family); |
| | 924 | return(1); |
| | 925 | } |
| | 926 | |
| | 927 | struct resolvedata |
| | 928 | { |
| | 929 | int fd; |
| | 930 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); |
| | 931 | void *data; |
| | 932 | struct sockaddr_storage addr; |
| | 933 | int addrlen; |
| | 934 | }; |
| | 935 | |
| | 936 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) |
| | 937 | { |
| | 938 | static char buf[80]; |
| | 939 | int ret; |
| | 940 | struct sockaddr_in *ipv4; |
| | 941 | |
| | 942 | if(!status) |
| | 943 | { |
| | 944 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) |
| | 945 | { |
| | 946 | errno = ENONET; |
| | 947 | data->callback(NULL, 0, data->data); |
| | 948 | } else { |
| | 949 | ipv4 = (struct sockaddr_in *)&data->addr; |
| | 950 | memcpy(&ipv4->sin_addr, buf, 4); |
| | 951 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); |
| | 952 | } |
| | 953 | } else { |
| | 954 | errno = ENONET; |
| | 955 | data->callback(NULL, 0, data->data); |
| | 956 | } |
| | 957 | close(data->fd); |
| | 958 | free(data); |
| | 959 | } |
| | 960 | |
| | 961 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) |
| | 962 | { |
| | 963 | int i; |
| | 964 | char *p; |
| | 965 | int port; |
| | 966 | int pfd[2]; |
| | 967 | pid_t child; |
| | 968 | struct resolvedata *rdata; |
| | 969 | struct sockaddr_in ipv4; |
| | 970 | struct hostent *he; |
| | 971 | sigset_t sigset; |
| | 972 | |
| | 973 | /* IPv4 */ |
| | 974 | port = -1; |
| | 975 | if((p = strchr(addr, ':')) != NULL) |
| | 976 | { |
| | 977 | *p = 0; |
| | 978 | port = atoi(p + 1); |
| | 979 | } |
| | 980 | ipv4.sin_family = AF_INET; |
| | 981 | ipv4.sin_port = htons(port); |
| | 982 | if(inet_aton(addr, &ipv4.sin_addr)) |
| | 983 | { |
| | 984 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); |
| | 985 | } else { |
| | 986 | sigemptyset(&sigset); |
| | 987 | sigaddset(&sigset, SIGCHLD); |
| | 988 | sigprocmask(SIG_BLOCK, &sigset, NULL); |
| | 989 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) |
| | 990 | { |
| | 991 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
| | 992 | return(-1); |
| | 993 | } |
| | 994 | if(child == 0) |
| | 995 | { |
| | 996 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
| | 997 | for(i = 3; i < FD_SETSIZE; i++) |
| | 998 | { |
| | 999 | if(i != pfd[1]) |
| | 1000 | close(i); |
| | 1001 | } |
| | 1002 | signal(SIGALRM, SIG_DFL); |
| | 1003 | alarm(30); |
| | 1004 | if((he = gethostbyname(addr)) == NULL) |
| | 1005 | exit(1); |
| | 1006 | write(pfd[1], he->h_addr_list[0], 4); |
| | 1007 | exit(0); |
| | 1008 | } else { |
| | 1009 | close(pfd[1]); |
| | 1010 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); |
| | 1011 | rdata = smalloc(sizeof(*rdata)); |
| | 1012 | rdata->fd = pfd[0]; |
| | 1013 | rdata->callback = callback; |
| | 1014 | rdata->data = data; |
| | 1015 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); |
| | 1016 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); |
| | 1017 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
| | 1018 | return(1); |
| | 1019 | } |
| | 1020 | } |
| | 1021 | return(0); |
| | 1022 | } |
| | 1023 | |
| | 1024 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1025 | { |
| | 1026 | socklen_t len; |
| | 1027 | struct sockaddr_storage name; |
| | 1028 | |
| | 1029 | *namebuf = NULL; |
| | 1030 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
| | 1031 | return(-1); |
| | 1032 | len = sizeof(name); |
| | 1033 | if(getsockname(sk->fd, (struct sockaddr *)&name, &len) < 0) |
| | 1034 | { |
| | 1035 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
| | 1036 | return(-1); |
| | 1037 | } |
| | 1038 | *namebuf = memcpy(smalloc(len), &name, len); |
| | 1039 | *lenbuf = len; |
| | 1040 | return(0); |
| | 1041 | } |
| | 1042 | |
| | 1043 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
| | 1044 | { |
| | 1045 | if(dst->sa_family != src->sa_family) |
| | 1046 | { |
| | 1047 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); |
| | 1048 | return; |
| | 1049 | } |
| | 1050 | switch(src->sa_family) |
| | 1051 | { |
| | 1052 | case AF_INET: |
| | 1053 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; |
| | 1054 | break; |
| | 1055 | case AF_INET6: |
| | 1056 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; |
| | 1057 | break; |
| | 1058 | default: |
| | 1059 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); |
| | 1060 | break; |
| | 1061 | } |
| | 1062 | } |
| | 1063 | |
| | 1064 | static int makepublic(struct sockaddr *addr) |
| | 1065 | { |
| | 1066 | int ret; |
| | 1067 | socklen_t plen; |
| | 1068 | struct sockaddr *pname; |
| | 1069 | |
| | 1070 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) |
| | 1071 | { |
| | 1072 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); |
| | 1073 | return(-1); |
| | 1074 | } |
| | 1075 | if(ret) |
| | 1076 | return(0); |
| | 1077 | sethostaddr(addr, pname); |
| | 1078 | free(pname); |
| | 1079 | return(0); |
| | 1080 | } |
| | 1081 | |
| | 1082 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1083 | { |
| | 1084 | socklen_t len; |
| | 1085 | struct sockaddr *name; |
| | 1086 | |
| | 1087 | switch(confgetint("net", "mode")) |
| | 1088 | { |
| | 1089 | case 0: |
| | 1090 | *namebuf = NULL; |
| | 1091 | if((sk->state == SOCK_STL) || (sk->fd < 0)) |
| | 1092 | { |
| | 1093 | errno = EBADF; |
| | 1094 | return(-1); |
| | 1095 | } |
| | 1096 | if(!sockgetlocalname(sk, &name, &len)) |
| | 1097 | { |
| | 1098 | *namebuf = name; |
| | 1099 | *lenbuf = len; |
| | 1100 | makepublic(name); |
| | 1101 | return(0); |
| | 1102 | } |
| | 1103 | flog(LOG_ERR, "could not get remotely accessible name by any means"); |
| | 1104 | return(-1); |
| | 1105 | case 1: |
| | 1106 | errno = EOPNOTSUPP; |
| | 1107 | return(-1); |
| | 1108 | default: |
| | 1109 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); |
| | 1110 | errno = EOPNOTSUPP; |
| | 1111 | return(-1); |
| | 1112 | } |
| | 1113 | } |
| | 1114 | |
| | 1115 | int addreq(struct sockaddr *x, struct sockaddr *y) |
| | 1116 | { |
| | 1117 | struct sockaddr_un *u1, *u2; |
| | 1118 | struct sockaddr_in *n1, *n2; |
| | 1119 | #ifdef HAVE_IPV6 |
| | 1120 | struct sockaddr_in6 *s1, *s2; |
| | 1121 | #endif |
| | 1122 | |
| | 1123 | if(x->sa_family != y->sa_family) |
| | 1124 | return(0); |
| | 1125 | switch(x->sa_family) { |
| | 1126 | case AF_UNIX: |
| | 1127 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; |
| | 1128 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) |
| | 1129 | return(0); |
| | 1130 | break; |
| | 1131 | case AF_INET: |
| | 1132 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; |
| | 1133 | if(n1->sin_port != n2->sin_port) |
| | 1134 | return(0); |
| | 1135 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) |
| | 1136 | return(0); |
| | 1137 | break; |
| | 1138 | #ifdef HAVE_IPV6 |
| | 1139 | case AF_INET6: |
| | 1140 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; |
| | 1141 | if(s1->sin6_port != s2->sin6_port) |
| | 1142 | return(0); |
| | 1143 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) |
| | 1144 | return(0); |
| | 1145 | break; |
| | 1146 | #endif |
| | 1147 | } |
| | 1148 | return(1); |
| | 1149 | } |
| | 1150 | |
| | 1151 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
| | 1152 | { |
| | 1153 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
| | 1154 | * lowercase letters to 1, so I do this |
| | 1155 | * instead. */ |
| | 1156 | struct sockaddr_in *ipv4; |
| | 1157 | #ifdef HAVE_IPV6 |
| | 1158 | struct sockaddr_in6 *ipv6; |
| | 1159 | #endif |
| | 1160 | static char *ret = NULL; |
| | 1161 | char buf[1024]; |
| | 1162 | |
| | 1163 | if(ret != NULL) |
| | 1164 | free(ret); |
| | 1165 | ret = NULL; |
| | 1166 | switch(arg->sa_family) |
| | 1167 | { |
| | 1168 | case AF_UNIX: |
| | 1169 | UNIX = (struct sockaddr_un *)arg; |
| | 1170 | ret = sprintf2("%s", UNIX->sun_path); |
| | 1171 | break; |
| | 1172 | case AF_INET: |
| | 1173 | ipv4 = (struct sockaddr_in *)arg; |
| | 1174 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) |
| | 1175 | return(NULL); |
| | 1176 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); |
| | 1177 | break; |
| | 1178 | #ifdef HAVE_IPV6 |
| | 1179 | case AF_INET6: |
| | 1180 | ipv6 = (struct sockaddr_in6 *)arg; |
| | 1181 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) |
| | 1182 | return(NULL); |
| | 1183 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
| | 1184 | break; |
| | 1185 | #endif |
| | 1186 | default: |
| | 1187 | errno = EPFNOSUPPORT; |
| | 1188 | break; |
| | 1189 | } |
| | 1190 | return(ret); |
| | 1191 | } |
| | 1192 | |
| | 1193 | #if 0 |
| | 1194 | |
| | 1195 | /* |
| | 1196 | * It was very nice to use this, but it seems |
| | 1197 | * to mess things up, so I guess it has to go... :-( |
| | 1198 | */ |
| | 1199 | |
| | 1200 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) |
| | 1201 | { |
| | 1202 | struct sockaddr *arg; |
| | 1203 | socklen_t arglen; |
| | 1204 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
| | 1205 | * lowercase letters to 1, so I do this |
| | 1206 | * instead. */ |
| | 1207 | struct sockaddr_in *ipv4; |
| | 1208 | int ret; |
| | 1209 | |
| | 1210 | arg = *(struct sockaddr **)(args[0]); |
| | 1211 | arglen = *(socklen_t *)(args[1]); |
| | 1212 | switch(arg->sa_family) |
| | 1213 | { |
| | 1214 | case AF_UNIX: |
| | 1215 | UNIX = (struct sockaddr_un *)arg; |
| | 1216 | ret = fprintf(stream, "%s", UNIX->sun_path); |
| | 1217 | break; |
| | 1218 | case AF_INET: |
| | 1219 | ipv4 = (struct sockaddr_in *)arg; |
| | 1220 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); |
| | 1221 | break; |
| | 1222 | default: |
| | 1223 | ret = -1; |
| | 1224 | errno = EPFNOSUPPORT; |
| | 1225 | break; |
| | 1226 | } |
| | 1227 | return(ret); |
| | 1228 | } |
| | 1229 | |
| | 1230 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) |
| | 1231 | { |
| | 1232 | if(n > 0) |
| | 1233 | argtypes[0] = PA_POINTER; |
| | 1234 | if(n > 1) |
| | 1235 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ |
| | 1236 | * be an int, so I guess this should be |
| | 1237 | * safe. */ |
| | 1238 | return(2); |
| | 1239 | } |
| | 1240 | #endif |
| | 1241 | |
| | 1242 | static int init(int hup) |
| | 1243 | { |
| | 1244 | if(!hup) |
| | 1245 | { |
| | 1246 | /* |
| | 1247 | if(register_printf_function('N', formataddress, formataddress_arginfo)) |
| | 1248 | { |
| | 1249 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); |
| | 1250 | return(1); |
| | 1251 | } |
| | 1252 | */ |
| | 1253 | } |
| | 1254 | return(0); |
| | 1255 | } |
| | 1256 | |
| | 1257 | static void terminate(void) |
| | 1258 | { |
| | 1259 | while(sockets != NULL) |
| | 1260 | unlinksock(sockets); |
| | 1261 | } |
| | 1262 | |
| | 1263 | static struct module me = |
| | 1264 | { |
| | 1265 | .name = "net", |
| | 1266 | .conf = |
| | 1267 | { |
| | 1268 | .vars = myvars |
| | 1269 | }, |
| | 1270 | .init = init, |
| | 1271 | .terminate = terminate |
| | 1272 | }; |
| | 1273 | |
| | 1274 | MODULE(me) |
Dolda2000 GitWeb / doldaconnect.git / blame_incremental