| | 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/select.h> |
| | 32 | #include <arpa/inet.h> |
| | 33 | #include <netinet/in.h> |
| | 34 | #include <netdb.h> |
| | 35 | #include <sys/signal.h> |
| | 36 | #include <sys/stat.h> /* For rebindunix() */ |
| | 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 | { |
| | 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. */ |
| | 55 | {CONF_VAR_INT, "mode", {.num = 0}}, |
| | 56 | /** Set the SO_REUSEADDR socket option on listening sockets, so |
| | 57 | * that dead TCP connections waiting for timeout are ignored. */ |
| | 58 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
| | 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. */ |
| | 63 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
| | 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. */ |
| | 68 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
| | 69 | /* Diffserv should be supported on IPv4, too, but I don't know the |
| | 70 | * API to do that. */ |
| | 71 | /** The Diffserv value to use on IPv6 connections when the |
| | 72 | * minimize cost TOS value is used (see the TOS VALUES |
| | 73 | * section). */ |
| | 74 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
| | 75 | /** The Diffserv value to use on IPv6 connections when the |
| | 76 | * maximize reliability TOS value is used (see the TOS VALUES |
| | 77 | * section). */ |
| | 78 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
| | 79 | /** The Diffserv value to use on IPv6 connections when the |
| | 80 | * maximize throughput TOS value is used (see the TOS VALUES |
| | 81 | * section). */ |
| | 82 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
| | 83 | /** The Diffserv value to use on IPv6 connections when the |
| | 84 | * minimize delay TOS value is used (see the TOS VALUES |
| | 85 | * section). */ |
| | 86 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
| | 87 | {CONF_VAR_END} |
| | 88 | }; |
| | 89 | |
| | 90 | #define UFD_SOCK 0 |
| | 91 | #define UFD_PIPE 1 |
| | 92 | #define UFD_LISTEN 2 |
| | 93 | |
| | 94 | struct scons { |
| | 95 | struct scons *n, *p; |
| | 96 | struct socket *s; |
| | 97 | }; |
| | 98 | |
| | 99 | struct ufd { |
| | 100 | struct ufd *next, *prev; |
| | 101 | int fd; |
| | 102 | int type; |
| | 103 | int ignread; |
| | 104 | struct socket *sk; |
| | 105 | union { |
| | 106 | struct { |
| | 107 | int family; |
| | 108 | int type; |
| | 109 | struct sockaddr *remote; |
| | 110 | socklen_t remotelen; |
| | 111 | struct { |
| | 112 | uid_t uid; |
| | 113 | gid_t gid; |
| | 114 | } ucred; |
| | 115 | } s; |
| | 116 | struct { |
| | 117 | struct lport *lp; |
| | 118 | int family; |
| | 119 | } l; |
| | 120 | } d; |
| | 121 | }; |
| | 122 | |
| | 123 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf); |
| | 124 | |
| | 125 | static struct ufd *ufds = NULL; |
| | 126 | static struct scons *rbatch, *wbatch, *cbatch; |
| | 127 | int numsocks = 0; |
| | 128 | |
| | 129 | /* XXX: Get autoconf for all this... */ |
| | 130 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) |
| | 131 | { |
| | 132 | struct sockaddr_in *ipv4; |
| | 133 | struct configvar *var; |
| | 134 | void *bufend; |
| | 135 | int sock; |
| | 136 | struct ifconf conf; |
| | 137 | struct ifreq *ifr, req; |
| | 138 | char *pif; |
| | 139 | |
| | 140 | if(af == AF_INET) |
| | 141 | { |
| | 142 | var = confgetvar("net", "visibleipv4"); |
| | 143 | if(var->val.ipv4.s_addr != 0) |
| | 144 | { |
| | 145 | ipv4 = smalloc(sizeof(*ipv4)); |
| | 146 | ipv4->sin_family = AF_INET; |
| | 147 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; |
| | 148 | *addr = (struct sockaddr *)ipv4; |
| | 149 | *lenbuf = sizeof(*ipv4); |
| | 150 | return(0); |
| | 151 | } |
| | 152 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
| | 153 | { |
| | 154 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); |
| | 155 | return(-1); |
| | 156 | } |
| | 157 | if(!strcmp(pif, "")) |
| | 158 | return(1); |
| | 159 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
| | 160 | return(-1); |
| | 161 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); |
| | 162 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) |
| | 163 | { |
| | 164 | free(conf.ifc_buf); |
| | 165 | close(sock); |
| | 166 | return(-1); |
| | 167 | } |
| | 168 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; |
| | 169 | ipv4 = NULL; |
| | 170 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) |
| | 171 | { |
| | 172 | if(strcmp(ifr->ifr_name, pif)) |
| | 173 | continue; |
| | 174 | memset(&req, 0, sizeof(req)); |
| | 175 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); |
| | 176 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) |
| | 177 | break; |
| | 178 | if(!(req.ifr_flags & IFF_UP)) |
| | 179 | { |
| | 180 | flog(LOG_WARNING, "public interface is down"); |
| | 181 | break; |
| | 182 | } |
| | 183 | if(ifr->ifr_addr.sa_family != AF_INET) |
| | 184 | { |
| | 185 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
| | 186 | break; |
| | 187 | } |
| | 188 | ipv4 = smalloc(sizeof(*ipv4)); |
| | 189 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); |
| | 190 | break; |
| | 191 | } |
| | 192 | free(conf.ifc_buf); |
| | 193 | close(sock); |
| | 194 | if(ipv4 != NULL) |
| | 195 | { |
| | 196 | *addr = (struct sockaddr *)ipv4; |
| | 197 | *lenbuf = sizeof(*ipv4); |
| | 198 | return(0); |
| | 199 | } |
| | 200 | errno = ENETDOWN; |
| | 201 | return(-1); |
| | 202 | } |
| | 203 | return(1); |
| | 204 | } |
| | 205 | |
| | 206 | static struct socket *newsock1(int dgram) |
| | 207 | { |
| | 208 | struct socket *new; |
| | 209 | |
| | 210 | new = memset(smalloc(sizeof(*new)), 0, sizeof(*new)); |
| | 211 | new->refcount = 1; |
| | 212 | new->state = -1; |
| | 213 | new->dgram = dgram; |
| | 214 | new->maxbuf = 65536; |
| | 215 | numsocks++; |
| | 216 | return(new); |
| | 217 | } |
| | 218 | |
| | 219 | static struct socket *sockpair(int dgram) |
| | 220 | { |
| | 221 | struct socket *s1, *s2; |
| | 222 | |
| | 223 | s1 = newsock1(dgram); |
| | 224 | s2 = newsock1(dgram); |
| | 225 | s1->back = s2; |
| | 226 | s2->back = s1; |
| | 227 | putsock(s2); |
| | 228 | return(s1); |
| | 229 | } |
| | 230 | |
| | 231 | static void sksetstate(struct socket *sk, int state) |
| | 232 | { |
| | 233 | sk->state = state; |
| | 234 | sk->back->state = state; |
| | 235 | } |
| | 236 | |
| | 237 | static void closeufd(struct ufd *ufd) |
| | 238 | { |
| | 239 | if(ufd->fd != -1) |
| | 240 | close(ufd->fd); |
| | 241 | ufd->fd = -1; |
| | 242 | } |
| | 243 | |
| | 244 | static void freeufd(struct ufd *ufd) |
| | 245 | { |
| | 246 | if(ufd->next != NULL) |
| | 247 | ufd->next->prev = ufd->prev; |
| | 248 | if(ufd->prev != NULL) |
| | 249 | ufd->prev->next = ufd->next; |
| | 250 | if(ufd == ufds) |
| | 251 | ufds = ufd->next; |
| | 252 | closeufd(ufd); |
| | 253 | if(ufd->sk != NULL) |
| | 254 | putsock(ufd->sk); |
| | 255 | if(ufd->type == UFD_SOCK) { |
| | 256 | if(ufd->d.s.remote != NULL) |
| | 257 | free(ufd->d.s.remote); |
| | 258 | } |
| | 259 | free(ufd); |
| | 260 | } |
| | 261 | |
| | 262 | static struct ufd *mkufd(int fd, int type, struct socket *sk) |
| | 263 | { |
| | 264 | struct ufd *ufd; |
| | 265 | |
| | 266 | ufd = memset(smalloc(sizeof(*ufd)), 0, sizeof(*ufd)); |
| | 267 | ufd->fd = fd; |
| | 268 | ufd->type = type; |
| | 269 | if(sk != NULL) { |
| | 270 | getsock(ufd->sk = sk); |
| | 271 | sk->ufd = ufd; |
| | 272 | } |
| | 273 | if(type == UFD_SOCK) { |
| | 274 | ufd->d.s.ucred.uid = -1; |
| | 275 | ufd->d.s.ucred.gid = -1; |
| | 276 | } |
| | 277 | ufd->next = ufds; |
| | 278 | if(ufds) |
| | 279 | ufds->prev = ufd; |
| | 280 | ufds = ufd; |
| | 281 | return(ufd); |
| | 282 | } |
| | 283 | |
| | 284 | static struct ufd *dupufd(struct ufd *ufd) |
| | 285 | { |
| | 286 | struct ufd *nufd; |
| | 287 | struct socket *nsk; |
| | 288 | |
| | 289 | if(ufd->sk != NULL) |
| | 290 | nsk = sockpair(ufd->sk->dgram); |
| | 291 | else |
| | 292 | nsk = NULL; |
| | 293 | nufd = mkufd(ufd->fd, ufd->type, nsk); |
| | 294 | if(nsk != NULL) |
| | 295 | putsock(nsk); |
| | 296 | if((nufd->fd = dup(ufd->fd)) < 0) |
| | 297 | { |
| | 298 | flog(LOG_WARNING, "could not dup() fd: %s", strerror(errno)); |
| | 299 | freeufd(nufd); |
| | 300 | return(NULL); |
| | 301 | } |
| | 302 | sksetstate(nsk, SOCK_EST); |
| | 303 | if(ufd->type == UFD_SOCK) { |
| | 304 | nufd->d.s.family = ufd->d.s.family; |
| | 305 | nufd->d.s.type = ufd->d.s.type; |
| | 306 | nufd->d.s.ucred.uid = ufd->d.s.ucred.uid; |
| | 307 | nufd->d.s.ucred.gid = ufd->d.s.ucred.gid; |
| | 308 | if(ufd->d.s.remote != NULL) |
| | 309 | nufd->d.s.remote = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, nufd->d.s.remotelen = ufd->d.s.remotelen); |
| | 310 | } else if(ufd->type == UFD_LISTEN) { |
| | 311 | nufd->d.l.family = ufd->d.l.family; |
| | 312 | } |
| | 313 | return(nufd); |
| | 314 | } |
| | 315 | |
| | 316 | static struct socket *mksock(int domain, int type) |
| | 317 | { |
| | 318 | int fd; |
| | 319 | struct socket *sk; |
| | 320 | struct ufd *ufd; |
| | 321 | |
| | 322 | if((fd = socket(domain, type, 0)) < 0) |
| | 323 | { |
| | 324 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); |
| | 325 | return(NULL); |
| | 326 | } |
| | 327 | sk = sockpair(type == SOCK_DGRAM); |
| | 328 | ufd = mkufd(fd, UFD_SOCK, sk); |
| | 329 | ufd->d.s.family = domain; |
| | 330 | ufd->d.s.type = type; |
| | 331 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
| | 332 | return(sk); |
| | 333 | } |
| | 334 | |
| | 335 | struct socket *wrapsock(int fd) |
| | 336 | { |
| | 337 | struct socket *sk; |
| | 338 | struct ufd *ufd; |
| | 339 | |
| | 340 | sk = sockpair(0); |
| | 341 | ufd = mkufd(fd, UFD_PIPE, sk->back); |
| | 342 | sksetstate(sk, SOCK_EST); |
| | 343 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
| | 344 | return(sk); |
| | 345 | } |
| | 346 | |
| | 347 | void getsock(struct socket *sk) |
| | 348 | { |
| | 349 | sk->refcount++; |
| | 350 | } |
| | 351 | |
| | 352 | static void freesock(struct socket *sk) |
| | 353 | { |
| | 354 | struct dgrambuf *buf; |
| | 355 | |
| | 356 | if(sk->dgram) { |
| | 357 | while((buf = sk->buf.d.f) != NULL) { |
| | 358 | sk->buf.d.f = buf->next; |
| | 359 | freedgbuf(buf); |
| | 360 | } |
| | 361 | } else { |
| | 362 | if(sk->buf.s.buf != NULL) |
| | 363 | free(sk->buf.s.buf); |
| | 364 | } |
| | 365 | free(sk); |
| | 366 | numsocks--; |
| | 367 | } |
| | 368 | |
| | 369 | void putsock(struct socket *sk) |
| | 370 | { |
| | 371 | struct socket *back; |
| | 372 | |
| | 373 | if(--(sk->refcount) < 0) { |
| | 374 | flog(LOG_CRIT, "BUG: socket refcount < 0"); |
| | 375 | abort(); |
| | 376 | } |
| | 377 | if((sk->refcount == 0) && (sk->back->refcount == 0)) { |
| | 378 | back = sk->back; |
| | 379 | freesock(sk); |
| | 380 | freesock(back); |
| | 381 | } |
| | 382 | } |
| | 383 | |
| | 384 | static void linksock(struct scons **list, struct socket *sk) |
| | 385 | { |
| | 386 | struct scons *sc; |
| | 387 | |
| | 388 | for(sc = *list; sc != NULL; sc = sc->n) { |
| | 389 | if(sc->s == sk) |
| | 390 | return; |
| | 391 | } |
| | 392 | sc = smalloc(sizeof(*sc)); |
| | 393 | getsock(sc->s = sk); |
| | 394 | sc->n = *list; |
| | 395 | sc->p = NULL; |
| | 396 | if(*list) |
| | 397 | (*list)->p = sc; |
| | 398 | *list = sc; |
| | 399 | } |
| | 400 | |
| | 401 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
| | 402 | { |
| | 403 | if(size == 0) |
| | 404 | return; |
| | 405 | if(sk->dgram) { |
| | 406 | /* XXX */ |
| | 407 | } else { |
| | 408 | sizebuf(&sk->buf.s.buf, &sk->buf.s.bufsize, sk->buf.s.datasize + size, 1, 1); |
| | 409 | memmove(sk->buf.s.buf + size, sk->buf.s.buf, sk->buf.s.datasize); |
| | 410 | memcpy(sk->buf.s.buf, buf, size); |
| | 411 | sk->buf.s.datasize += size; |
| | 412 | linksock(&rbatch, sk); |
| | 413 | } |
| | 414 | } |
| | 415 | |
| | 416 | /* Read as the preterite of `read' */ |
| | 417 | void sockread(struct socket *sk) |
| | 418 | { |
| | 419 | if((sockgetdatalen(sk) == 0) && (sk->eos == 1)) |
| | 420 | linksock(&rbatch, sk); |
| | 421 | linksock(&wbatch, sk->back); |
| | 422 | } |
| | 423 | |
| | 424 | void freedgbuf(struct dgrambuf *dg) |
| | 425 | { |
| | 426 | if(dg->data != NULL) |
| | 427 | free(dg->data); |
| | 428 | if(dg->addr != NULL) |
| | 429 | free(dg->addr); |
| | 430 | free(dg); |
| | 431 | } |
| | 432 | |
| | 433 | struct dgrambuf *sockgetdgbuf(struct socket *sk) |
| | 434 | { |
| | 435 | struct dgrambuf *dbuf; |
| | 436 | |
| | 437 | if((dbuf = sk->buf.d.f) == NULL) |
| | 438 | return(NULL); |
| | 439 | sk->buf.d.f = dbuf->next; |
| | 440 | if(dbuf->next == NULL) |
| | 441 | sk->buf.d.l = NULL; |
| | 442 | dbuf->next = NULL; |
| | 443 | sockread(sk); |
| | 444 | return(dbuf); |
| | 445 | } |
| | 446 | |
| | 447 | void *sockgetinbuf(struct socket *sk, size_t *size) |
| | 448 | { |
| | 449 | void *buf; |
| | 450 | struct dgrambuf *dbuf; |
| | 451 | |
| | 452 | if(sk->dgram) { |
| | 453 | dbuf = sockgetdgbuf(sk); |
| | 454 | buf = dbuf->data; |
| | 455 | *size = dbuf->size; |
| | 456 | free(dbuf->addr); |
| | 457 | free(dbuf); |
| | 458 | } else { |
| | 459 | if((sk->buf.s.buf == NULL) || (sk->buf.s.datasize == 0)) |
| | 460 | { |
| | 461 | *size = 0; |
| | 462 | return(NULL); |
| | 463 | } |
| | 464 | buf = sk->buf.s.buf; |
| | 465 | *size = sk->buf.s.datasize; |
| | 466 | sk->buf.s.buf = NULL; |
| | 467 | sk->buf.s.bufsize = sk->buf.s.datasize = 0; |
| | 468 | sockread(sk); |
| | 469 | } |
| | 470 | return(buf); |
| | 471 | } |
| | 472 | |
| | 473 | void sockqueue(struct socket *sk, void *data, size_t size) |
| | 474 | { |
| | 475 | struct dgrambuf *new; |
| | 476 | struct sockaddr *remote; |
| | 477 | socklen_t remotelen; |
| | 478 | |
| | 479 | if(size == 0) |
| | 480 | return; |
| | 481 | if(sk->state == SOCK_STL) |
| | 482 | return; |
| | 483 | if(sk->dgram) { |
| | 484 | if(sockpeeraddr(sk, &remote, &remotelen)) |
| | 485 | return; |
| | 486 | new = smalloc(sizeof(*new)); |
| | 487 | new->next = NULL; |
| | 488 | memcpy(new->data = smalloc(size), data, new->size = size); |
| | 489 | new->addr = remote; |
| | 490 | new->addrlen = remotelen; |
| | 491 | if(sk->back->buf.d.l == NULL) |
| | 492 | { |
| | 493 | sk->back->buf.d.l = sk->back->buf.d.f = new; |
| | 494 | } else { |
| | 495 | sk->back->buf.d.l->next = new; |
| | 496 | sk->back->buf.d.l = new; |
| | 497 | } |
| | 498 | } else { |
| | 499 | sizebuf(&(sk->back->buf.s.buf), &(sk->back->buf.s.bufsize), sk->back->buf.s.datasize + size, 1, 1); |
| | 500 | memcpy(sk->back->buf.s.buf + sk->back->buf.s.datasize, data, size); |
| | 501 | sk->back->buf.s.datasize += size; |
| | 502 | } |
| | 503 | linksock(&rbatch, sk->back); |
| | 504 | } |
| | 505 | |
| | 506 | void sockqueuedg(struct socket *sk, struct dgrambuf *dg) |
| | 507 | { |
| | 508 | if(sk->state == SOCK_STL) { |
| | 509 | freedgbuf(dg); |
| | 510 | return; |
| | 511 | } |
| | 512 | if(!sk->dgram) { |
| | 513 | flog(LOG_ERR, "BUG: sockqueuedg called on non-dgram socket"); |
| | 514 | freedgbuf(dg); |
| | 515 | return; |
| | 516 | } |
| | 517 | dg->next = NULL; |
| | 518 | if(sk->back->buf.d.l == NULL) |
| | 519 | { |
| | 520 | sk->back->buf.d.l = sk->back->buf.d.f = dg; |
| | 521 | } else { |
| | 522 | sk->back->buf.d.l->next = dg; |
| | 523 | sk->back->buf.d.l = dg; |
| | 524 | } |
| | 525 | linksock(&rbatch, sk->back); |
| | 526 | } |
| | 527 | |
| | 528 | void sockerror(struct socket *sk, int en) |
| | 529 | { |
| | 530 | sksetstate(sk, SOCK_STL); |
| | 531 | if(sk->back->errcb != NULL) |
| | 532 | sk->back->errcb(sk->back, en, sk->back->data); |
| | 533 | } |
| | 534 | |
| | 535 | static void recvcmsg(struct ufd *ufd, struct msghdr *msg) |
| | 536 | { |
| | 537 | struct cmsghdr *cmsg; |
| | 538 | |
| | 539 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) |
| | 540 | { |
| | 541 | #if UNIX_AUTH_STYLE == 1 |
| | 542 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
| | 543 | { |
| | 544 | struct ucred *cred; |
| | 545 | if(ufd->d.s.ucred.uid == -1) |
| | 546 | { |
| | 547 | cred = (struct ucred *)CMSG_DATA(cmsg); |
| | 548 | ufd->d.s.ucred.uid = cred->uid; |
| | 549 | ufd->d.s.ucred.gid = cred->gid; |
| | 550 | } |
| | 551 | } |
| | 552 | #endif |
| | 553 | } |
| | 554 | } |
| | 555 | |
| | 556 | static int ufddgram(struct ufd *ufd) |
| | 557 | { |
| | 558 | int dgram; |
| | 559 | |
| | 560 | if(ufd->type == UFD_SOCK) { |
| | 561 | dgram = ufd->d.s.type == SOCK_DGRAM; |
| | 562 | } else if(ufd->type == UFD_PIPE) { |
| | 563 | dgram = 0; |
| | 564 | } else { |
| | 565 | flog(LOG_ERR, "BUG: calling ufddgram on ufd of bad type %i", ufd->type); |
| | 566 | return(-1); |
| | 567 | } |
| | 568 | if(ufd->sk == NULL) { |
| | 569 | flog(LOG_ERR, "BUG: calling ufddgram on socketless ufd (type %i)", ufd->type); |
| | 570 | return(-1); |
| | 571 | } |
| | 572 | if(dgram != ufd->sk->dgram) { |
| | 573 | flog(LOG_ERR, "BUG: ufd/socket dgram value mismatch"); |
| | 574 | return(-1); |
| | 575 | } |
| | 576 | return(dgram); |
| | 577 | } |
| | 578 | |
| | 579 | static void sockrecv(struct ufd *ufd) |
| | 580 | { |
| | 581 | int ret, inq; |
| | 582 | int dgram; |
| | 583 | struct dgrambuf *dbuf; |
| | 584 | struct msghdr msg; |
| | 585 | char cbuf[65536]; |
| | 586 | struct iovec bufvec; |
| | 587 | void *buf; |
| | 588 | |
| | 589 | memset(&msg, 0, sizeof(msg)); |
| | 590 | msg.msg_iov = &bufvec; |
| | 591 | msg.msg_iovlen = 1; |
| | 592 | msg.msg_control = cbuf; |
| | 593 | msg.msg_controllen = sizeof(cbuf); |
| | 594 | if((dgram = ufddgram(ufd)) < 0) |
| | 595 | return; |
| | 596 | if(dgram) { |
| | 597 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
| | 598 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
| | 599 | { |
| | 600 | /* I don't really know what could go wrong here, so let's |
| | 601 | * assume it's transient. */ |
| | 602 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), ufd->fd); |
| | 603 | return; |
| | 604 | } |
| | 605 | #else |
| | 606 | inq = 65536; |
| | 607 | #endif |
| | 608 | dbuf = smalloc(sizeof(*dbuf)); |
| | 609 | dbuf->data = smalloc(inq); |
| | 610 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); |
| | 611 | msg.msg_name = dbuf->addr; |
| | 612 | msg.msg_namelen = dbuf->addrlen; |
| | 613 | bufvec.iov_base = dbuf->data; |
| | 614 | bufvec.iov_len = inq; |
| | 615 | ret = recvmsg(ufd->fd, &msg, 0); |
| | 616 | dbuf->addrlen = msg.msg_namelen; |
| | 617 | if(ret < 0) |
| | 618 | { |
| | 619 | freedgbuf(dbuf); |
| | 620 | if((errno == EINTR) || (errno == EAGAIN)) |
| | 621 | return; |
| | 622 | closeufd(ufd); |
| | 623 | sockerror(ufd->sk, errno); |
| | 624 | return; |
| | 625 | } |
| | 626 | if(msg.msg_flags & MSG_CTRUNC) |
| | 627 | flog(LOG_DEBUG, "ancillary data was truncated"); |
| | 628 | else |
| | 629 | recvcmsg(ufd, &msg); |
| | 630 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
| | 631 | * have EOF), but rather an empty packet. I don't know if any |
| | 632 | * other potential DGRAM protocols might have an EOF |
| | 633 | * condition, so let's play safe. */ |
| | 634 | if(ret == 0) |
| | 635 | { |
| | 636 | freedgbuf(dbuf); |
| | 637 | if((ufd->type != UFD_SOCK) || !((ufd->d.s.family == AF_INET) || (ufd->d.s.family == AF_INET6))) |
| | 638 | { |
| | 639 | closesock(ufd->sk); |
| | 640 | closeufd(ufd); |
| | 641 | } |
| | 642 | return; |
| | 643 | } |
| | 644 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); |
| | 645 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); |
| | 646 | dbuf->next = NULL; |
| | 647 | sockqueuedg(ufd->sk, dbuf); |
| | 648 | } else { |
| | 649 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
| | 650 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea |
| | 651 | * how to read the inqueue size on other OSs */ |
| | 652 | if(ufd->type == UFD_SOCK) { |
| | 653 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
| | 654 | { |
| | 655 | /* I don't really know what could go wrong here, so let's |
| | 656 | * assume it's transient. */ |
| | 657 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), ufd->fd); |
| | 658 | inq = 2048; |
| | 659 | } |
| | 660 | } else { |
| | 661 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ |
| | 662 | inq = 65536; |
| | 663 | } |
| | 664 | #else |
| | 665 | inq = 2048; |
| | 666 | #endif |
| | 667 | if(inq > 65536) |
| | 668 | inq = 65536; |
| | 669 | /* This part could be optimized by telling the kernel to read |
| | 670 | * directly into ufd->sk->back->buf, but that would be uglier |
| | 671 | * by not using the socket function interface. */ |
| | 672 | buf = smalloc(inq); |
| | 673 | if(ufd->type == UFD_SOCK) |
| | 674 | { |
| | 675 | bufvec.iov_base = buf; |
| | 676 | bufvec.iov_len = inq; |
| | 677 | ret = recvmsg(ufd->fd, &msg, 0); |
| | 678 | } else { |
| | 679 | ret = read(ufd->fd, buf, inq); |
| | 680 | msg.msg_controllen = 0; |
| | 681 | msg.msg_flags = 0; |
| | 682 | } |
| | 683 | if(ret < 0) |
| | 684 | { |
| | 685 | free(buf); |
| | 686 | if((errno == EINTR) || (errno == EAGAIN)) |
| | 687 | return; |
| | 688 | closeufd(ufd); |
| | 689 | sockerror(ufd->sk, errno); |
| | 690 | return; |
| | 691 | } |
| | 692 | if(msg.msg_flags & MSG_CTRUNC) |
| | 693 | flog(LOG_DEBUG, "ancillary data was truncated"); |
| | 694 | else |
| | 695 | recvcmsg(ufd, &msg); |
| | 696 | if(ret == 0) |
| | 697 | { |
| | 698 | free(buf); |
| | 699 | closeufd(ufd); |
| | 700 | closesock(ufd->sk); |
| | 701 | return; |
| | 702 | } |
| | 703 | sockqueue(ufd->sk, buf, ret); |
| | 704 | free(buf); |
| | 705 | } |
| | 706 | } |
| | 707 | |
| | 708 | static int sockflush(struct ufd *ufd) |
| | 709 | { |
| | 710 | int ret; |
| | 711 | struct dgrambuf *dbuf; |
| | 712 | int dgram; |
| | 713 | |
| | 714 | if((dgram = ufddgram(ufd)) < 0) { |
| | 715 | errno = EBADFD; |
| | 716 | return(-1); |
| | 717 | } |
| | 718 | if(dgram) { |
| | 719 | dbuf = sockgetdgbuf(ufd->sk); |
| | 720 | sendto(ufd->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); |
| | 721 | freedgbuf(dbuf); |
| | 722 | } else { |
| | 723 | if(ufd->type == UFD_SOCK) |
| | 724 | ret = send(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); |
| | 725 | else |
| | 726 | ret = write(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize); |
| | 727 | if(ret < 0) |
| | 728 | return(-1); |
| | 729 | if(ret > 0) { |
| | 730 | memmove(ufd->sk->buf.s.buf, ((char *)ufd->sk->buf.s.buf) + ret, ufd->sk->buf.s.datasize -= ret); |
| | 731 | sockread(ufd->sk); |
| | 732 | } |
| | 733 | } |
| | 734 | return(0); |
| | 735 | } |
| | 736 | |
| | 737 | void closesock(struct socket *sk) |
| | 738 | { |
| | 739 | sksetstate(sk, SOCK_STL); |
| | 740 | if(sk->back->eos == 0) |
| | 741 | sk->back->eos = 1; |
| | 742 | linksock(&rbatch, sk->back); |
| | 743 | } |
| | 744 | |
| | 745 | size_t sockgetdatalen(struct socket *sk) |
| | 746 | { |
| | 747 | struct dgrambuf *b; |
| | 748 | size_t ret; |
| | 749 | |
| | 750 | if(sk->dgram) { |
| | 751 | ret = 0; |
| | 752 | for(b = sk->buf.d.f; b != NULL; b = b->next) |
| | 753 | ret += b->size; |
| | 754 | } else { |
| | 755 | ret = sk->buf.s.datasize; |
| | 756 | } |
| | 757 | return(ret); |
| | 758 | } |
| | 759 | |
| | 760 | /* size_t sockqueuesize(struct socket *sk) */ |
| | 761 | /* { */ |
| | 762 | /* return(sockgetdatalen(sk->back)); */ |
| | 763 | /* } */ |
| | 764 | |
| | 765 | ssize_t sockqueueleft(struct socket *sk) |
| | 766 | { |
| | 767 | return(sk->back->maxbuf - sockgetdatalen(sk->back)); |
| | 768 | } |
| | 769 | |
| | 770 | /* |
| | 771 | * Seriously, I don't know if it's naughty or not to remove |
| | 772 | * pre-existing Unix sockets. |
| | 773 | */ |
| | 774 | static int rebindunix(struct ufd *ufd, struct sockaddr *name, socklen_t namelen) |
| | 775 | { |
| | 776 | struct sockaddr_un *un; |
| | 777 | struct stat sb; |
| | 778 | |
| | 779 | if((ufd->d.l.family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
| | 780 | return(-1); |
| | 781 | un = (struct sockaddr_un *)name; |
| | 782 | if(stat(un->sun_path, &sb)) |
| | 783 | return(-1); |
| | 784 | if(!S_ISSOCK(sb.st_mode)) |
| | 785 | return(-1); |
| | 786 | if(unlink(un->sun_path)) |
| | 787 | return(-1); |
| | 788 | if(bind(ufd->fd, name, namelen) < 0) |
| | 789 | return(-1); |
| | 790 | return(0); |
| | 791 | } |
| | 792 | |
| | 793 | void closelport(struct lport *lp) |
| | 794 | { |
| | 795 | struct ufd *ufd; |
| | 796 | struct sockaddr_un *un; |
| | 797 | |
| | 798 | ufd = lp->ufd; |
| | 799 | if((ufd->d.l.family == AF_UNIX) && !getlocalname(ufd->fd, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX) && strchr(un->sun_path, '/')) { |
| | 800 | if(unlink(un->sun_path)) |
| | 801 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); |
| | 802 | } |
| | 803 | freeufd(lp->ufd); |
| | 804 | } |
| | 805 | |
| | 806 | /* |
| | 807 | * The difference between netcslisten() and netcslistenlocal() is that |
| | 808 | * netcslistenlocal() always listens on the local host, instead of |
| | 809 | * following proxy/passive mode directions. It is suitable for eg. the |
| | 810 | * UI channel, while the file sharing networks should, naturally, use |
| | 811 | * netcslisten() instead. |
| | 812 | */ |
| | 813 | |
| | 814 | struct lport *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
| | 815 | { |
| | 816 | struct lport *lp; |
| | 817 | struct ufd *ufd; |
| | 818 | int fd; |
| | 819 | int intbuf; |
| | 820 | |
| | 821 | /* I don't know if this is actually correct (it probably isn't), |
| | 822 | * but since, at on least Linux systems, PF_* are specifically |
| | 823 | * #define'd to their AF_* counterparts, it allows for a severely |
| | 824 | * smoother implementation. If it breaks something on your |
| | 825 | * platform, please tell me so. |
| | 826 | */ |
| | 827 | if((fd = socket(name->sa_family, type, 0)) < 0) |
| | 828 | return(NULL); |
| | 829 | if(confgetint("net", "reuseaddr")) { |
| | 830 | intbuf = 1; |
| | 831 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
| | 832 | } |
| | 833 | ufd = mkufd(fd, UFD_LISTEN, NULL); |
| | 834 | ufd->d.l.family = name->sa_family; |
| | 835 | lp = memset(smalloc(sizeof(*lp)), 0, sizeof(*lp)); |
| | 836 | lp->ufd = ufd; |
| | 837 | ufd->d.l.lp = lp; |
| | 838 | if((bind(fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(ufd, name, namelen) < 0))) { |
| | 839 | freeufd(ufd); |
| | 840 | return(NULL); |
| | 841 | } |
| | 842 | if(listen(fd, 16) < 0) |
| | 843 | { |
| | 844 | freeufd(ufd); |
| | 845 | return(NULL); |
| | 846 | } |
| | 847 | lp->acceptcb = func; |
| | 848 | lp->data = data; |
| | 849 | return(lp); |
| | 850 | } |
| | 851 | |
| | 852 | struct lport *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
| | 853 | { |
| | 854 | if(confgetint("net", "mode") == 1) |
| | 855 | { |
| | 856 | errno = EOPNOTSUPP; |
| | 857 | return(NULL); |
| | 858 | } |
| | 859 | if(confgetint("net", "mode") == 0) |
| | 860 | return(netcslistenlocal(type, name, namelen, func, data)); |
| | 861 | errno = EOPNOTSUPP; |
| | 862 | return(NULL); |
| | 863 | } |
| | 864 | |
| | 865 | struct lport *netcstcplisten(int port, int local, void (*func)(struct lport *, struct socket *, void *), void *data) |
| | 866 | { |
| | 867 | struct sockaddr_in addr; |
| | 868 | #ifdef HAVE_IPV6 |
| | 869 | struct sockaddr_in6 addr6; |
| | 870 | #endif |
| | 871 | struct lport *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct lport *, struct socket *, void *), void *); |
| | 872 | struct lport *ret; |
| | 873 | |
| | 874 | if(local) |
| | 875 | csfunc = netcslistenlocal; |
| | 876 | else |
| | 877 | csfunc = netcslisten; |
| | 878 | #ifdef HAVE_IPV6 |
| | 879 | memset(&addr6, 0, sizeof(addr6)); |
| | 880 | addr6.sin6_family = AF_INET6; |
| | 881 | addr6.sin6_port = htons(port); |
| | 882 | addr6.sin6_addr = in6addr_any; |
| | 883 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) |
| | 884 | return(ret); |
| | 885 | if((ret == NULL) && (errno != EAFNOSUPPORT)) |
| | 886 | return(NULL); |
| | 887 | #endif |
| | 888 | memset(&addr, 0, sizeof(addr)); |
| | 889 | addr.sin_family = AF_INET; |
| | 890 | addr.sin_port = htons(port); |
| | 891 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); |
| | 892 | } |
| | 893 | |
| | 894 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
| | 895 | { |
| | 896 | struct socket *sk; |
| | 897 | int mode; |
| | 898 | |
| | 899 | mode = confgetint("net", "mode"); |
| | 900 | if((mode == 0) || (mode == 1)) |
| | 901 | { |
| | 902 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) |
| | 903 | return(NULL); |
| | 904 | if(bind(sk->ufd->fd, name, namelen) < 0) |
| | 905 | { |
| | 906 | putsock(sk); |
| | 907 | return(NULL); |
| | 908 | } |
| | 909 | sksetstate(sk, SOCK_EST); |
| | 910 | return(sk->back); |
| | 911 | } |
| | 912 | errno = EOPNOTSUPP; |
| | 913 | return(NULL); |
| | 914 | } |
| | 915 | |
| | 916 | struct socket *netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
| | 917 | { |
| | 918 | struct ufd *nufd; |
| | 919 | |
| | 920 | nufd = dupufd(sk->back->ufd); |
| | 921 | getsock(sk = nufd->sk->back); |
| | 922 | memcpy(nufd->d.s.remote = smalloc(addrlen), addr, nufd->d.s.remotelen = addrlen); |
| | 923 | nufd->ignread = 1; |
| | 924 | return(sk); |
| | 925 | } |
| | 926 | |
| | 927 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
| | 928 | { |
| | 929 | struct socket *sk; |
| | 930 | int mode; |
| | 931 | |
| | 932 | mode = confgetint("net", "mode"); |
| | 933 | if((mode == 0) || (mode == 1)) |
| | 934 | { |
| | 935 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) |
| | 936 | return(NULL); |
| | 937 | memcpy(sk->ufd->d.s.remote = smalloc(addrlen), addr, sk->ufd->d.s.remotelen = addrlen); |
| | 938 | sk->back->conncb = func; |
| | 939 | sk->back->data = data; |
| | 940 | if(!connect(sk->ufd->fd, addr, addrlen)) |
| | 941 | { |
| | 942 | sksetstate(sk, SOCK_EST); |
| | 943 | linksock(&cbatch, sk->back); |
| | 944 | return(sk->back); |
| | 945 | } |
| | 946 | if(errno == EINPROGRESS) |
| | 947 | { |
| | 948 | sksetstate(sk, SOCK_SYN); |
| | 949 | return(sk->back); |
| | 950 | } |
| | 951 | putsock(sk); |
| | 952 | return(NULL); |
| | 953 | } |
| | 954 | errno = EOPNOTSUPP; |
| | 955 | return(NULL); |
| | 956 | } |
| | 957 | |
| | 958 | static void acceptunix(struct ufd *ufd) |
| | 959 | { |
| | 960 | int buf; |
| | 961 | |
| | 962 | buf = 1; |
| | 963 | #if UNIX_AUTH_STYLE == 1 |
| | 964 | if(setsockopt(ufd->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
| | 965 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", ufd->fd, strerror(errno)); |
| | 966 | #elif UNIX_AUTH_STYLE == 2 |
| | 967 | if(getpeereid(ufd->fd, &ufd->d.s.ucred.uid, &ufd->d.s.ucred.gid) < 0) |
| | 968 | { |
| | 969 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", ufd->fd, strerror(errno)); |
| | 970 | ufd->d.s.ucred.uid = -1; |
| | 971 | ufd->d.s.ucred.gid = -1; |
| | 972 | } |
| | 973 | #endif |
| | 974 | } |
| | 975 | |
| | 976 | static void runbatches(void) |
| | 977 | { |
| | 978 | struct scons *sc, *nsc; |
| | 979 | |
| | 980 | for(sc = cbatch, cbatch = NULL; sc; sc = nsc) { |
| | 981 | nsc = sc->n; |
| | 982 | if(sc->s->conncb != NULL) |
| | 983 | sc->s->conncb(sc->s, 0, sc->s->data); |
| | 984 | putsock(sc->s); |
| | 985 | free(sc); |
| | 986 | } |
| | 987 | for(sc = rbatch, rbatch = NULL; sc; sc = nsc) { |
| | 988 | nsc = sc->n; |
| | 989 | if(sc->s->readcb != NULL) |
| | 990 | sc->s->readcb(sc->s, sc->s->data); |
| | 991 | if((sockgetdatalen(sc->s) == 0) && (sc->s->eos == 1)) { |
| | 992 | if(sc->s->errcb != NULL) |
| | 993 | sc->s->errcb(sc->s, 0, sc->s->data); |
| | 994 | sc->s->eos = 2; |
| | 995 | } |
| | 996 | putsock(sc->s); |
| | 997 | free(sc); |
| | 998 | } |
| | 999 | for(sc = wbatch, wbatch = NULL; sc; sc = nsc) { |
| | 1000 | nsc = sc->n; |
| | 1001 | if(sc->s->writecb != NULL) |
| | 1002 | sc->s->writecb(sc->s, sc->s->data); |
| | 1003 | putsock(sc->s); |
| | 1004 | free(sc); |
| | 1005 | } |
| | 1006 | } |
| | 1007 | |
| | 1008 | static void cleansocks(void) |
| | 1009 | { |
| | 1010 | struct ufd *ufd, *next; |
| | 1011 | |
| | 1012 | for(ufd = ufds; ufd != NULL; ufd = next) { |
| | 1013 | next = ufd->next; |
| | 1014 | if(ufd->sk && ((ufd->fd < 0) || (sockgetdatalen(ufd->sk) == 0))) { |
| | 1015 | if(ufd->sk->eos == 1) { |
| | 1016 | ufd->sk->eos = 2; |
| | 1017 | closeufd(ufd); |
| | 1018 | closesock(ufd->sk); |
| | 1019 | } |
| | 1020 | if((ufd->sk->refcount == 1) && (ufd->sk->back->refcount == 0)) { |
| | 1021 | freeufd(ufd); |
| | 1022 | continue; |
| | 1023 | } |
| | 1024 | } |
| | 1025 | } |
| | 1026 | } |
| | 1027 | |
| | 1028 | int pollsocks(int timeout) |
| | 1029 | { |
| | 1030 | int ret; |
| | 1031 | socklen_t retlen; |
| | 1032 | int newfd, maxfd; |
| | 1033 | fd_set rfds, wfds, efds; |
| | 1034 | struct ufd *ufd, *nufd; |
| | 1035 | struct socket *nsk; |
| | 1036 | struct sockaddr_storage ss; |
| | 1037 | socklen_t sslen; |
| | 1038 | struct timeval tv; |
| | 1039 | |
| | 1040 | cleansocks(); |
| | 1041 | FD_ZERO(&rfds); |
| | 1042 | FD_ZERO(&wfds); |
| | 1043 | FD_ZERO(&efds); |
| | 1044 | for(maxfd = 0, ufd = ufds; ufd != NULL; ufd = ufd->next) { |
| | 1045 | if(ufd->fd < 0) |
| | 1046 | continue; |
| | 1047 | if(!ufd->ignread && ((ufd->sk == NULL) || (sockqueueleft(ufd->sk) > 0))) |
| | 1048 | FD_SET(ufd->fd, &rfds); |
| | 1049 | if(ufd->sk != NULL) { |
| | 1050 | if(sockgetdatalen(ufd->sk) > 0) |
| | 1051 | FD_SET(ufd->fd, &wfds); |
| | 1052 | else if(ufd->sk->state == SOCK_SYN) |
| | 1053 | FD_SET(ufd->fd, &wfds); |
| | 1054 | } |
| | 1055 | FD_SET(ufd->fd, &efds); |
| | 1056 | if(ufd->fd > maxfd) |
| | 1057 | maxfd = ufd->fd; |
| | 1058 | } |
| | 1059 | if(rbatch || wbatch || cbatch) |
| | 1060 | timeout = 0; |
| | 1061 | tv.tv_sec = timeout / 1000; |
| | 1062 | tv.tv_usec = (timeout % 1000) * 1000; |
| | 1063 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); |
| | 1064 | if(ret < 0) { |
| | 1065 | if(errno != EINTR) { |
| | 1066 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
| | 1067 | /* To avoid CPU hogging in case it's bad, which it |
| | 1068 | * probably is. */ |
| | 1069 | sleep(1); |
| | 1070 | } |
| | 1071 | return(1); |
| | 1072 | } |
| | 1073 | for(ufd = ufds; ufd != NULL; ufd = ufd->next) { |
| | 1074 | if(ufd->sk < 0) |
| | 1075 | continue; |
| | 1076 | if(ufd->type == UFD_LISTEN) { |
| | 1077 | if(FD_ISSET(ufd->fd, &rfds)) { |
| | 1078 | sslen = sizeof(ss); |
| | 1079 | if((newfd = accept(ufd->fd, (struct sockaddr *)&ss, &sslen)) < 0) { |
| | 1080 | if(ufd->d.l.lp->errcb != NULL) |
| | 1081 | ufd->d.l.lp->errcb(ufd->d.l.lp, errno, ufd->d.l.lp->data); |
| | 1082 | } |
| | 1083 | nsk = sockpair(0); |
| | 1084 | nufd = mkufd(newfd, UFD_SOCK, nsk); |
| | 1085 | nufd->d.s.family = ufd->d.l.family; |
| | 1086 | sksetstate(nsk, SOCK_EST); |
| | 1087 | memcpy(nufd->d.s.remote = smalloc(sslen), &ss, sslen); |
| | 1088 | nufd->d.s.remotelen = sslen; |
| | 1089 | if(ss.ss_family == PF_UNIX) |
| | 1090 | acceptunix(nufd); |
| | 1091 | if(ufd->d.l.lp->acceptcb != NULL) |
| | 1092 | ufd->d.l.lp->acceptcb(ufd->d.l.lp, nsk->back, ufd->d.l.lp->data); |
| | 1093 | putsock(nsk); |
| | 1094 | } |
| | 1095 | if(FD_ISSET(ufd->fd, &efds)) { |
| | 1096 | retlen = sizeof(ret); |
| | 1097 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
| | 1098 | if(ufd->d.l.lp->errcb != NULL) |
| | 1099 | ufd->d.l.lp->errcb(ufd->d.l.lp, ret, ufd->d.l.lp->data); |
| | 1100 | continue; |
| | 1101 | } |
| | 1102 | } else { |
| | 1103 | if(ufd->sk->state == SOCK_SYN) { |
| | 1104 | if(FD_ISSET(ufd->fd, &efds)) { |
| | 1105 | retlen = sizeof(ret); |
| | 1106 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
| | 1107 | if(ufd->sk->back->conncb != NULL) |
| | 1108 | ufd->sk->back->conncb(ufd->sk->back, ret, ufd->sk->back->data); |
| | 1109 | closeufd(ufd); |
| | 1110 | continue; |
| | 1111 | } |
| | 1112 | if(FD_ISSET(ufd->fd, &rfds) || FD_ISSET(ufd->fd, &wfds)) { |
| | 1113 | sksetstate(ufd->sk, SOCK_EST); |
| | 1114 | linksock(&cbatch, ufd->sk->back); |
| | 1115 | } |
| | 1116 | } else if(ufd->sk->state == SOCK_EST) { |
| | 1117 | if(FD_ISSET(ufd->fd, &efds)) { |
| | 1118 | retlen = sizeof(ret); |
| | 1119 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
| | 1120 | sockerror(ufd->sk, ret); |
| | 1121 | closeufd(ufd); |
| | 1122 | continue; |
| | 1123 | } |
| | 1124 | if(FD_ISSET(ufd->fd, &rfds)) |
| | 1125 | sockrecv(ufd); |
| | 1126 | if(ufd->fd == -1) |
| | 1127 | continue; |
| | 1128 | if(FD_ISSET(ufd->fd, &wfds)) { |
| | 1129 | if(sockflush(ufd)) { |
| | 1130 | sockerror(ufd->sk, errno); |
| | 1131 | closeufd(ufd); |
| | 1132 | continue; |
| | 1133 | } |
| | 1134 | } |
| | 1135 | } |
| | 1136 | } |
| | 1137 | } |
| | 1138 | runbatches(); |
| | 1139 | cleansocks(); |
| | 1140 | return(1); |
| | 1141 | } |
| | 1142 | |
| | 1143 | static struct ufd *getskufd(struct socket *sk) |
| | 1144 | { |
| | 1145 | while(1) { |
| | 1146 | if(sk->back->ufd != NULL) |
| | 1147 | return(sk->back->ufd); |
| | 1148 | if((sk = sk->back->pnext) == NULL) |
| | 1149 | break; |
| | 1150 | } |
| | 1151 | return(NULL); |
| | 1152 | } |
| | 1153 | |
| | 1154 | int socksettos(struct socket *sk, int tos) |
| | 1155 | { |
| | 1156 | int buf; |
| | 1157 | struct ufd *ufd; |
| | 1158 | |
| | 1159 | ufd = getskufd(sk); |
| | 1160 | if(ufd->type != UFD_SOCK) { |
| | 1161 | errno = EOPNOTSUPP; |
| | 1162 | return(-1); |
| | 1163 | } |
| | 1164 | if(ufd->d.s.family == AF_UNIX) |
| | 1165 | return(0); /* Unix sockets are always perfect. :) */ |
| | 1166 | if(ufd->d.s.family == AF_INET) |
| | 1167 | { |
| | 1168 | switch(tos) |
| | 1169 | { |
| | 1170 | case 0: |
| | 1171 | buf = 0; |
| | 1172 | break; |
| | 1173 | case SOCK_TOS_MINCOST: |
| | 1174 | buf = 0x02; |
| | 1175 | break; |
| | 1176 | case SOCK_TOS_MAXREL: |
| | 1177 | buf = 0x04; |
| | 1178 | break; |
| | 1179 | case SOCK_TOS_MAXTP: |
| | 1180 | buf = 0x08; |
| | 1181 | break; |
| | 1182 | case SOCK_TOS_MINDELAY: |
| | 1183 | buf = 0x10; |
| | 1184 | break; |
| | 1185 | default: |
| | 1186 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
| | 1187 | return(-1); |
| | 1188 | } |
| | 1189 | if(setsockopt(ufd->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
| | 1190 | { |
| | 1191 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); |
| | 1192 | return(-1); |
| | 1193 | } |
| | 1194 | return(0); |
| | 1195 | } |
| | 1196 | if(ufd->d.s.family == AF_INET6) |
| | 1197 | { |
| | 1198 | switch(tos) |
| | 1199 | { |
| | 1200 | case 0: |
| | 1201 | buf = 0; |
| | 1202 | case SOCK_TOS_MINCOST: |
| | 1203 | buf = confgetint("net", "diffserv-mincost"); |
| | 1204 | break; |
| | 1205 | case SOCK_TOS_MAXREL: |
| | 1206 | buf = confgetint("net", "diffserv-maxrel"); |
| | 1207 | break; |
| | 1208 | case SOCK_TOS_MAXTP: |
| | 1209 | buf = confgetint("net", "diffserv-maxtp"); |
| | 1210 | break; |
| | 1211 | case SOCK_TOS_MINDELAY: |
| | 1212 | buf = confgetint("net", "diffserv-mindelay"); |
| | 1213 | break; |
| | 1214 | default: |
| | 1215 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); |
| | 1216 | return(-1); |
| | 1217 | } |
| | 1218 | /* |
| | 1219 | On Linux, the API IPv6 flow label management doesn't seem to |
| | 1220 | be entirely complete, so I guess this will have to wait. |
| | 1221 | |
| | 1222 | if(setsockopt(...) < 0) |
| | 1223 | { |
| | 1224 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); |
| | 1225 | return(-1); |
| | 1226 | } |
| | 1227 | */ |
| | 1228 | return(0); |
| | 1229 | } |
| | 1230 | flog(LOG_WARNING, "could not set TOS on sock of family %i", ufd->d.s.family); |
| | 1231 | return(1); |
| | 1232 | } |
| | 1233 | |
| | 1234 | struct resolvedata |
| | 1235 | { |
| | 1236 | int fd; |
| | 1237 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); |
| | 1238 | void *data; |
| | 1239 | struct sockaddr_storage addr; |
| | 1240 | int addrlen; |
| | 1241 | }; |
| | 1242 | |
| | 1243 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) |
| | 1244 | { |
| | 1245 | static char buf[80]; |
| | 1246 | int ret; |
| | 1247 | struct sockaddr_in *ipv4; |
| | 1248 | |
| | 1249 | if(!status) |
| | 1250 | { |
| | 1251 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) |
| | 1252 | { |
| | 1253 | errno = ENOENT; |
| | 1254 | data->callback(NULL, 0, data->data); |
| | 1255 | } else { |
| | 1256 | ipv4 = (struct sockaddr_in *)&data->addr; |
| | 1257 | memcpy(&ipv4->sin_addr, buf, 4); |
| | 1258 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); |
| | 1259 | } |
| | 1260 | } else { |
| | 1261 | errno = ENOENT; |
| | 1262 | data->callback(NULL, 0, data->data); |
| | 1263 | } |
| | 1264 | close(data->fd); |
| | 1265 | free(data); |
| | 1266 | } |
| | 1267 | |
| | 1268 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) |
| | 1269 | { |
| | 1270 | int i; |
| | 1271 | char *p; |
| | 1272 | int port; |
| | 1273 | int pfd[2]; |
| | 1274 | pid_t child; |
| | 1275 | struct resolvedata *rdata; |
| | 1276 | struct sockaddr_in ipv4; |
| | 1277 | struct hostent *he; |
| | 1278 | sigset_t sigset; |
| | 1279 | |
| | 1280 | /* IPv4 */ |
| | 1281 | port = -1; |
| | 1282 | if((p = strchr(addr, ':')) != NULL) |
| | 1283 | { |
| | 1284 | *p = 0; |
| | 1285 | port = atoi(p + 1); |
| | 1286 | } |
| | 1287 | ipv4.sin_family = AF_INET; |
| | 1288 | ipv4.sin_port = htons(port); |
| | 1289 | if(inet_aton(addr, &ipv4.sin_addr)) |
| | 1290 | { |
| | 1291 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); |
| | 1292 | } else { |
| | 1293 | sigemptyset(&sigset); |
| | 1294 | sigaddset(&sigset, SIGCHLD); |
| | 1295 | sigprocmask(SIG_BLOCK, &sigset, NULL); |
| | 1296 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) |
| | 1297 | { |
| | 1298 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
| | 1299 | return(-1); |
| | 1300 | } |
| | 1301 | if(child == 0) |
| | 1302 | { |
| | 1303 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
| | 1304 | for(i = 3; i < FD_SETSIZE; i++) |
| | 1305 | { |
| | 1306 | if(i != pfd[1]) |
| | 1307 | close(i); |
| | 1308 | } |
| | 1309 | signal(SIGALRM, SIG_DFL); |
| | 1310 | alarm(30); |
| | 1311 | if((he = gethostbyname(addr)) == NULL) |
| | 1312 | exit(1); |
| | 1313 | write(pfd[1], he->h_addr_list[0], 4); |
| | 1314 | exit(0); |
| | 1315 | } else { |
| | 1316 | close(pfd[1]); |
| | 1317 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); |
| | 1318 | rdata = smalloc(sizeof(*rdata)); |
| | 1319 | rdata->fd = pfd[0]; |
| | 1320 | rdata->callback = callback; |
| | 1321 | rdata->data = data; |
| | 1322 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); |
| | 1323 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); |
| | 1324 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
| | 1325 | return(1); |
| | 1326 | } |
| | 1327 | } |
| | 1328 | return(0); |
| | 1329 | } |
| | 1330 | |
| | 1331 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1332 | { |
| | 1333 | socklen_t len; |
| | 1334 | struct sockaddr_storage name; |
| | 1335 | |
| | 1336 | *namebuf = NULL; |
| | 1337 | if(fd < 0) |
| | 1338 | return(-1); |
| | 1339 | len = sizeof(name); |
| | 1340 | if(getsockname(fd, (struct sockaddr *)&name, &len) < 0) |
| | 1341 | { |
| | 1342 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
| | 1343 | return(-1); |
| | 1344 | } |
| | 1345 | *namebuf = memcpy(smalloc(len), &name, len); |
| | 1346 | if(lenbuf != NULL) |
| | 1347 | *lenbuf = len; |
| | 1348 | return(0); |
| | 1349 | } |
| | 1350 | |
| | 1351 | int lstgetlocalname(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1352 | { |
| | 1353 | struct ufd *ufd; |
| | 1354 | |
| | 1355 | ufd = lp->ufd; |
| | 1356 | return(getlocalname(ufd->fd, namebuf, lenbuf)); |
| | 1357 | } |
| | 1358 | |
| | 1359 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1360 | { |
| | 1361 | struct ufd *ufd; |
| | 1362 | |
| | 1363 | ufd = getskufd(sk); |
| | 1364 | if(ufd->type != UFD_SOCK) { |
| | 1365 | errno = EOPNOTSUPP; |
| | 1366 | return(-1); |
| | 1367 | } |
| | 1368 | return(getlocalname(ufd->fd, namebuf, lenbuf)); |
| | 1369 | } |
| | 1370 | |
| | 1371 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
| | 1372 | { |
| | 1373 | if(dst->sa_family != src->sa_family) |
| | 1374 | { |
| | 1375 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); |
| | 1376 | return; |
| | 1377 | } |
| | 1378 | switch(src->sa_family) |
| | 1379 | { |
| | 1380 | case AF_INET: |
| | 1381 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; |
| | 1382 | break; |
| | 1383 | case AF_INET6: |
| | 1384 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; |
| | 1385 | break; |
| | 1386 | default: |
| | 1387 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); |
| | 1388 | break; |
| | 1389 | } |
| | 1390 | } |
| | 1391 | |
| | 1392 | static int makepublic(struct sockaddr *addr) |
| | 1393 | { |
| | 1394 | int ret; |
| | 1395 | socklen_t plen; |
| | 1396 | struct sockaddr *pname; |
| | 1397 | |
| | 1398 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) |
| | 1399 | { |
| | 1400 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); |
| | 1401 | return(-1); |
| | 1402 | } |
| | 1403 | if(ret) |
| | 1404 | return(0); |
| | 1405 | sethostaddr(addr, pname); |
| | 1406 | free(pname); |
| | 1407 | return(0); |
| | 1408 | } |
| | 1409 | |
| | 1410 | static int getremotename(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1411 | { |
| | 1412 | socklen_t len; |
| | 1413 | struct sockaddr *name; |
| | 1414 | |
| | 1415 | switch(confgetint("net", "mode")) { |
| | 1416 | case 0: |
| | 1417 | *namebuf = NULL; |
| | 1418 | if(!getlocalname(fd, &name, &len)) { |
| | 1419 | *namebuf = name; |
| | 1420 | *lenbuf = len; |
| | 1421 | makepublic(name); |
| | 1422 | return(0); |
| | 1423 | } |
| | 1424 | flog(LOG_ERR, "could not get remotely accessible name by any means"); |
| | 1425 | return(-1); |
| | 1426 | case 1: |
| | 1427 | errno = EOPNOTSUPP; |
| | 1428 | return(-1); |
| | 1429 | default: |
| | 1430 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); |
| | 1431 | errno = EOPNOTSUPP; |
| | 1432 | return(-1); |
| | 1433 | } |
| | 1434 | } |
| | 1435 | |
| | 1436 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1437 | { |
| | 1438 | struct ufd *ufd; |
| | 1439 | |
| | 1440 | ufd = getskufd(sk); |
| | 1441 | if(ufd->type != UFD_SOCK) { |
| | 1442 | errno = EOPNOTSUPP; |
| | 1443 | return(-1); |
| | 1444 | } |
| | 1445 | if(ufd->fd < 0) { |
| | 1446 | errno = EBADF; |
| | 1447 | return(-1); |
| | 1448 | } |
| | 1449 | return(getremotename(ufd->fd, namebuf, lenbuf)); |
| | 1450 | } |
| | 1451 | |
| | 1452 | int lstgetremotename(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1453 | { |
| | 1454 | struct ufd *ufd; |
| | 1455 | |
| | 1456 | ufd = lp->ufd; |
| | 1457 | return(getremotename(ufd->fd, namebuf, lenbuf)); |
| | 1458 | } |
| | 1459 | |
| | 1460 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1461 | { |
| | 1462 | struct sockaddr *name1, *name2; |
| | 1463 | socklen_t len1, len2; |
| | 1464 | struct ufd *ufd1, *ufd2; |
| | 1465 | |
| | 1466 | ufd1 = getskufd(sk); |
| | 1467 | ufd2 = getskufd(sk2); |
| | 1468 | if((ufd1->type != UFD_SOCK) || (ufd2->type != UFD_SOCK)) { |
| | 1469 | errno = EOPNOTSUPP; |
| | 1470 | return(-1); |
| | 1471 | } |
| | 1472 | if(ufd1->d.s.family != ufd2->d.s.family) |
| | 1473 | { |
| | 1474 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); |
| | 1475 | return(-1); |
| | 1476 | } |
| | 1477 | if(getremotename(ufd1->fd, &name1, &len1)) |
| | 1478 | return(-1); |
| | 1479 | if(getremotename(ufd2->fd, &name2, &len2)) { |
| | 1480 | free(name1); |
| | 1481 | return(-1); |
| | 1482 | } |
| | 1483 | sethostaddr(name1, name2); |
| | 1484 | free(name2); |
| | 1485 | *namebuf = name1; |
| | 1486 | *lenbuf = len1; |
| | 1487 | return(0); |
| | 1488 | } |
| | 1489 | |
| | 1490 | int lstgetremotename2(struct lport *lp, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1491 | { |
| | 1492 | struct sockaddr *name1, *name2; |
| | 1493 | socklen_t len1, len2; |
| | 1494 | struct ufd *ufd1, *ufd2; |
| | 1495 | |
| | 1496 | ufd1 = lp->ufd; |
| | 1497 | ufd2 = getskufd(sk2); |
| | 1498 | if(ufd2->type != UFD_SOCK) { |
| | 1499 | errno = EOPNOTSUPP; |
| | 1500 | return(-1); |
| | 1501 | } |
| | 1502 | if(ufd1->d.l.family != ufd2->d.s.family) |
| | 1503 | { |
| | 1504 | flog(LOG_ERR, "using lstgetremotename2 with sockets of differing family: %i %i", ufd1->d.l.family, ufd2->d.s.family); |
| | 1505 | return(-1); |
| | 1506 | } |
| | 1507 | if(getremotename(ufd1->fd, &name1, &len1)) |
| | 1508 | return(-1); |
| | 1509 | if(getremotename(ufd2->fd, &name2, &len2)) { |
| | 1510 | free(name1); |
| | 1511 | return(-1); |
| | 1512 | } |
| | 1513 | sethostaddr(name1, name2); |
| | 1514 | free(name2); |
| | 1515 | *namebuf = name1; |
| | 1516 | *lenbuf = len1; |
| | 1517 | return(0); |
| | 1518 | } |
| | 1519 | |
| | 1520 | int getucred(struct socket *sk, uid_t *uid, gid_t *gid) |
| | 1521 | { |
| | 1522 | struct ufd *ufd; |
| | 1523 | |
| | 1524 | ufd = getskufd(sk); |
| | 1525 | if(ufd->type != UFD_SOCK) { |
| | 1526 | errno = EOPNOTSUPP; |
| | 1527 | return(-1); |
| | 1528 | } |
| | 1529 | if(ufd->d.s.family != AF_UNIX) { |
| | 1530 | errno = EOPNOTSUPP; |
| | 1531 | return(-1); |
| | 1532 | } |
| | 1533 | *uid = ufd->d.s.ucred.uid; |
| | 1534 | *gid = ufd->d.s.ucred.gid; |
| | 1535 | return(0); |
| | 1536 | } |
| | 1537 | |
| | 1538 | /* void sockblock(struct socket *sk, int block) */ |
| | 1539 | /* { */ |
| | 1540 | /* struct ufd *ufd; */ |
| | 1541 | |
| | 1542 | /* ufd = getskufd(sk); */ |
| | 1543 | /* ufd->ignread = block; */ |
| | 1544 | /* } */ |
| | 1545 | |
| | 1546 | int sockfamily(struct socket *sk) |
| | 1547 | { |
| | 1548 | struct ufd *ufd; |
| | 1549 | |
| | 1550 | ufd = getskufd(sk); |
| | 1551 | if(ufd->type != UFD_SOCK) { |
| | 1552 | errno = EOPNOTSUPP; |
| | 1553 | return(-1); |
| | 1554 | } |
| | 1555 | return(ufd->d.s.family); |
| | 1556 | } |
| | 1557 | |
| | 1558 | int sockpeeraddr(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
| | 1559 | { |
| | 1560 | struct ufd *ufd; |
| | 1561 | |
| | 1562 | ufd = getskufd(sk); |
| | 1563 | if(ufd->type != UFD_SOCK) { |
| | 1564 | errno = EOPNOTSUPP; |
| | 1565 | return(-1); |
| | 1566 | } |
| | 1567 | if(ufd->d.s.remote == NULL) |
| | 1568 | return(-1); |
| | 1569 | *namebuf = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, ufd->d.s.remotelen); |
| | 1570 | if(lenbuf != NULL) |
| | 1571 | *lenbuf = ufd->d.s.remotelen; |
| | 1572 | return(0); |
| | 1573 | } |
| | 1574 | |
| | 1575 | char *formatsockpeer(struct socket *sk) |
| | 1576 | { |
| | 1577 | struct sockaddr *name; |
| | 1578 | socklen_t nlen; |
| | 1579 | char *ret; |
| | 1580 | |
| | 1581 | if(sockpeeraddr(sk, &name, &nlen)) |
| | 1582 | return(NULL); |
| | 1583 | ret = formataddress(name, nlen); |
| | 1584 | free(name); |
| | 1585 | return(ret); |
| | 1586 | } |
| | 1587 | |
| | 1588 | int addreq(struct sockaddr *x, struct sockaddr *y) |
| | 1589 | { |
| | 1590 | struct sockaddr_un *u1, *u2; |
| | 1591 | struct sockaddr_in *n1, *n2; |
| | 1592 | #ifdef HAVE_IPV6 |
| | 1593 | struct sockaddr_in6 *s1, *s2; |
| | 1594 | #endif |
| | 1595 | |
| | 1596 | if(x->sa_family != y->sa_family) |
| | 1597 | return(0); |
| | 1598 | switch(x->sa_family) { |
| | 1599 | case AF_UNIX: |
| | 1600 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; |
| | 1601 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) |
| | 1602 | return(0); |
| | 1603 | break; |
| | 1604 | case AF_INET: |
| | 1605 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; |
| | 1606 | if(n1->sin_port != n2->sin_port) |
| | 1607 | return(0); |
| | 1608 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) |
| | 1609 | return(0); |
| | 1610 | break; |
| | 1611 | #ifdef HAVE_IPV6 |
| | 1612 | case AF_INET6: |
| | 1613 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; |
| | 1614 | if(s1->sin6_port != s2->sin6_port) |
| | 1615 | return(0); |
| | 1616 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) |
| | 1617 | return(0); |
| | 1618 | break; |
| | 1619 | #endif |
| | 1620 | } |
| | 1621 | return(1); |
| | 1622 | } |
| | 1623 | |
| | 1624 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
| | 1625 | { |
| | 1626 | struct sockaddr_in *ipv4; |
| | 1627 | #ifdef HAVE_IPV6 |
| | 1628 | struct sockaddr_in6 *ipv6; |
| | 1629 | #endif |
| | 1630 | static char *ret = NULL; |
| | 1631 | char buf[1024]; |
| | 1632 | |
| | 1633 | if(ret != NULL) |
| | 1634 | free(ret); |
| | 1635 | ret = NULL; |
| | 1636 | switch(arg->sa_family) |
| | 1637 | { |
| | 1638 | case AF_UNIX: |
| | 1639 | ret = sstrdup("Unix socket"); |
| | 1640 | break; |
| | 1641 | case AF_INET: |
| | 1642 | ipv4 = (struct sockaddr_in *)arg; |
| | 1643 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) |
| | 1644 | return(NULL); |
| | 1645 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); |
| | 1646 | break; |
| | 1647 | #ifdef HAVE_IPV6 |
| | 1648 | case AF_INET6: |
| | 1649 | ipv6 = (struct sockaddr_in6 *)arg; |
| | 1650 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) |
| | 1651 | return(NULL); |
| | 1652 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
| | 1653 | break; |
| | 1654 | #endif |
| | 1655 | default: |
| | 1656 | errno = EPFNOSUPPORT; |
| | 1657 | break; |
| | 1658 | } |
| | 1659 | return(ret); |
| | 1660 | } |
| | 1661 | |
| | 1662 | #if 0 |
| | 1663 | |
| | 1664 | /* |
| | 1665 | * It was very nice to use this, but it seems |
| | 1666 | * to mess things up, so I guess it has to go... :-( |
| | 1667 | */ |
| | 1668 | |
| | 1669 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) |
| | 1670 | { |
| | 1671 | struct sockaddr *arg; |
| | 1672 | socklen_t arglen; |
| | 1673 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with |
| | 1674 | * lowercase letters to 1, so I do this |
| | 1675 | * instead. */ |
| | 1676 | struct sockaddr_in *ipv4; |
| | 1677 | int ret; |
| | 1678 | |
| | 1679 | arg = *(struct sockaddr **)(args[0]); |
| | 1680 | arglen = *(socklen_t *)(args[1]); |
| | 1681 | switch(arg->sa_family) |
| | 1682 | { |
| | 1683 | case AF_UNIX: |
| | 1684 | UNIX = (struct sockaddr_un *)arg; |
| | 1685 | ret = fprintf(stream, "%s", UNIX->sun_path); |
| | 1686 | break; |
| | 1687 | case AF_INET: |
| | 1688 | ipv4 = (struct sockaddr_in *)arg; |
| | 1689 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); |
| | 1690 | break; |
| | 1691 | default: |
| | 1692 | ret = -1; |
| | 1693 | errno = EPFNOSUPPORT; |
| | 1694 | break; |
| | 1695 | } |
| | 1696 | return(ret); |
| | 1697 | } |
| | 1698 | |
| | 1699 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) |
| | 1700 | { |
| | 1701 | if(n > 0) |
| | 1702 | argtypes[0] = PA_POINTER; |
| | 1703 | if(n > 1) |
| | 1704 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ |
| | 1705 | * be an int, so I guess this should be |
| | 1706 | * safe. */ |
| | 1707 | return(2); |
| | 1708 | } |
| | 1709 | #endif |
| | 1710 | |
| | 1711 | static int init(int hup) |
| | 1712 | { |
| | 1713 | if(!hup) |
| | 1714 | { |
| | 1715 | /* |
| | 1716 | if(register_printf_function('N', formataddress, formataddress_arginfo)) |
| | 1717 | { |
| | 1718 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); |
| | 1719 | return(1); |
| | 1720 | } |
| | 1721 | */ |
| | 1722 | } |
| | 1723 | return(0); |
| | 1724 | } |
| | 1725 | |
| | 1726 | static void terminate(void) |
| | 1727 | { |
| | 1728 | /* |
| | 1729 | while(ufds != NULL) |
| | 1730 | freeufd(ufds); |
| | 1731 | */ |
| | 1732 | } |
| | 1733 | |
| | 1734 | static struct module me = |
| | 1735 | { |
| | 1736 | .name = "net", |
| | 1737 | .conf = |
| | 1738 | { |
| | 1739 | .vars = myvars |
| | 1740 | }, |
| | 1741 | .init = init, |
| | 1742 | .terminate = terminate |
| | 1743 | }; |
| | 1744 | |
| | 1745 | MODULE(me) |
Dolda2000 GitWeb / doldaconnect.git / blame_incremental