| 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <ureg.h> |
| 4 | #include "dat.h" |
| 5 | #include "fns.h" |
| 6 | #include "linux.h" |
| 7 | |
| 8 | typedef struct Socket Socket; |
| 9 | typedef struct Connectproc Connectproc; |
| 10 | typedef struct Listenproc Listenproc; |
| 11 | |
| 12 | enum { |
| 13 | Ctlsize = 128, |
| 14 | }; |
| 15 | |
| 16 | struct Socket |
| 17 | { |
| 18 | Ufile; |
| 19 | |
| 20 | int family; |
| 21 | int stype; |
| 22 | int protocol; |
| 23 | |
| 24 | int other; |
| 25 | char net[40]; |
| 26 | char name[Ctlsize]; |
| 27 | |
| 28 | int naddr; |
| 29 | uchar addr[40]; |
| 30 | |
| 31 | void *bufproc; |
| 32 | Connectproc *connectproc; |
| 33 | Listenproc *listenproc; |
| 34 | |
| 35 | int connected; |
| 36 | int error; |
| 37 | |
| 38 | Socket *next; |
| 39 | }; |
| 40 | |
| 41 | struct Connectproc |
| 42 | { |
| 43 | Ref; |
| 44 | QLock; |
| 45 | Socket *sock; |
| 46 | int notefd; |
| 47 | Uwaitq wq; |
| 48 | char str[Ctlsize]; |
| 49 | }; |
| 50 | |
| 51 | struct Listenproc |
| 52 | { |
| 53 | Ref; |
| 54 | QLock; |
| 55 | Socket *sock; |
| 56 | int notefd; |
| 57 | Uwaitq wq; |
| 58 | Socket *q; |
| 59 | char str[Ctlsize]; |
| 60 | }; |
| 61 | |
| 62 | enum |
| 63 | { |
| 64 | AF_UNIX =1, |
| 65 | AF_INET =2, |
| 66 | AF_INET6 =10, |
| 67 | }; |
| 68 | |
| 69 | enum |
| 70 | { |
| 71 | SOCK_STREAM =1, |
| 72 | SOCK_DGRAM =2, |
| 73 | SOCK_RAW =3, |
| 74 | }; |
| 75 | |
| 76 | static char* |
| 77 | srvname(char *npath, char *path, int len) |
| 78 | { |
| 79 | char *p; |
| 80 | |
| 81 | p = strrchr(path, '/'); |
| 82 | if(p == 0) |
| 83 | p = path; |
| 84 | else |
| 85 | p++; |
| 86 | snprint(npath, len, "/srv/UD.%s", p); |
| 87 | return npath; |
| 88 | } |
| 89 | |
| 90 | static int |
| 91 | srvunixsock(int fd, char *path) |
| 92 | { |
| 93 | int ret; |
| 94 | int sfd; |
| 95 | char buf[8+Ctlsize+1]; |
| 96 | |
| 97 | sfd = -1; |
| 98 | ret = -1; |
| 99 | if(fd < 0) |
| 100 | goto out; |
| 101 | srvname(buf, path, sizeof(buf)); |
| 102 | remove(buf); |
| 103 | if((sfd = create(buf, OWRITE, 0666)) < 0) |
| 104 | goto out; |
| 105 | sprint(buf, "%d", fd); |
| 106 | if(write(sfd, buf, strlen(buf)) < 0) |
| 107 | goto out; |
| 108 | ret = 0; |
| 109 | out: |
| 110 | if(sfd >= 0) |
| 111 | close(sfd); |
| 112 | return ret; |
| 113 | } |
| 114 | |
| 115 | static void |
| 116 | unsrvunixsock(char *path) |
| 117 | { |
| 118 | char buf[8+Ctlsize+1]; |
| 119 | |
| 120 | srvname(buf, path, sizeof(buf)); |
| 121 | remove(buf); |
| 122 | } |
| 123 | |
| 124 | static Socket* |
| 125 | allocsock(int family, int stype, int protocol) |
| 126 | { |
| 127 | Socket *sock; |
| 128 | |
| 129 | sock = kmallocz(sizeof(*sock), 1); |
| 130 | sock->family = family; |
| 131 | sock->stype = stype; |
| 132 | sock->protocol = protocol; |
| 133 | sock->fd = -1; |
| 134 | sock->other = -1; |
| 135 | sock->ref = 1; |
| 136 | sock->dev = SOCKDEV; |
| 137 | sock->mode = O_RDWR; |
| 138 | |
| 139 | return sock; |
| 140 | } |
| 141 | |
| 142 | static int |
| 143 | newsock(int family, int stype, int protocol) |
| 144 | { |
| 145 | Socket *sock; |
| 146 | char *net; |
| 147 | char buf[Ctlsize]; |
| 148 | int pfd[2]; |
| 149 | int cfd, dfd; |
| 150 | int n; |
| 151 | int err; |
| 152 | |
| 153 | trace("newsock(%d, %d, %d)", family, stype, protocol); |
| 154 | |
| 155 | err = -EINVAL; |
| 156 | switch(family){ |
| 157 | case AF_INET: |
| 158 | case AF_INET6: |
| 159 | switch(stype){ |
| 160 | case SOCK_DGRAM: |
| 161 | net = "udp"; |
| 162 | break; |
| 163 | case SOCK_STREAM: |
| 164 | net = "tcp"; |
| 165 | break; |
| 166 | default: |
| 167 | trace("newsock() unknown socket type %d/%d", family, stype); |
| 168 | return err; |
| 169 | } |
| 170 | break; |
| 171 | case AF_UNIX: |
| 172 | net = nil; |
| 173 | break; |
| 174 | |
| 175 | default: |
| 176 | trace("newsock() unknown network family %d", family); |
| 177 | return err; |
| 178 | } |
| 179 | |
| 180 | sock = allocsock(family, stype, protocol); |
| 181 | cfd = -1; |
| 182 | if(net == nil){ |
| 183 | if(pipe(pfd) < 0){ |
| 184 | err = mkerror(); |
| 185 | goto errout; |
| 186 | } |
| 187 | sock->other = pfd[1]; |
| 188 | sock->fd = pfd[0]; |
| 189 | } else { |
| 190 | snprint(buf, sizeof(buf), "/net/%s/clone", net); |
| 191 | if((cfd = open(buf, ORDWR)) < 0){ |
| 192 | err = mkerror(); |
| 193 | goto errout; |
| 194 | } |
| 195 | n = read(cfd, buf, sizeof(buf)-1); |
| 196 | if(n < 0) |
| 197 | err = mkerror(); |
| 198 | if(n <= 0) |
| 199 | goto errout; |
| 200 | buf[n] = 0; |
| 201 | n = atoi(buf); |
| 202 | snprint(buf, sizeof(buf), "/net/%s/%d/data", net, n); |
| 203 | if((dfd = open(buf, ORDWR)) < 0){ |
| 204 | err = mkerror(); |
| 205 | goto errout; |
| 206 | } |
| 207 | close(cfd); |
| 208 | sock->fd = dfd; |
| 209 | snprint(sock->net, sizeof(sock->net), "/net/%s", net); |
| 210 | snprint(sock->name, sizeof(sock->name), "%s/%d", sock->net, n); |
| 211 | } |
| 212 | return newfd(sock, FD_CLOEXEC); |
| 213 | |
| 214 | errout: |
| 215 | close(cfd); |
| 216 | free(sock); |
| 217 | return err; |
| 218 | } |
| 219 | |
| 220 | static void |
| 221 | freeconnectproc(Connectproc *cp) |
| 222 | { |
| 223 | if(cp == nil) |
| 224 | return; |
| 225 | qlock(cp); |
| 226 | cp->sock = nil; |
| 227 | if(decref(cp)){ |
| 228 | write(cp->notefd, "interrupt", 9); |
| 229 | qunlock(cp); |
| 230 | return; |
| 231 | } |
| 232 | qunlock(cp); |
| 233 | close(cp->notefd); |
| 234 | free(cp); |
| 235 | } |
| 236 | |
| 237 | static void |
| 238 | freelistenproc(Listenproc *lp) |
| 239 | { |
| 240 | Socket *q; |
| 241 | |
| 242 | if(lp == nil) |
| 243 | return; |
| 244 | qlock(lp); |
| 245 | lp->sock = nil; |
| 246 | if(decref(lp)){ |
| 247 | write(lp->notefd, "interrupt", 9); |
| 248 | qunlock(lp); |
| 249 | return; |
| 250 | } |
| 251 | while(q = lp->q){ |
| 252 | lp->q = q->next; |
| 253 | putfile(q); |
| 254 | } |
| 255 | qunlock(lp); |
| 256 | close(lp->notefd); |
| 257 | free(lp); |
| 258 | } |
| 259 | |
| 260 | static int |
| 261 | closesock(Ufile *file) |
| 262 | { |
| 263 | Socket *sock = (Socket*)file; |
| 264 | |
| 265 | close(sock->fd); |
| 266 | close(sock->other); |
| 267 | freebufproc(sock->bufproc); |
| 268 | freeconnectproc(sock->connectproc); |
| 269 | freelistenproc(sock->listenproc); |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | |
| 274 | static void |
| 275 | connectproc(void *aux) |
| 276 | { |
| 277 | int fd, cfd, other; |
| 278 | char buf[Ctlsize], tmp[8+Ctlsize+1]; |
| 279 | Connectproc *cp; |
| 280 | Socket *sock; |
| 281 | int err; |
| 282 | |
| 283 | cp = (Connectproc*)aux; |
| 284 | qlock(cp); |
| 285 | if((sock = cp->sock) == nil) |
| 286 | goto out; |
| 287 | |
| 288 | snprint(buf, sizeof(buf), "connectproc() %s", cp->str); |
| 289 | setprocname(buf); |
| 290 | |
| 291 | err = 0; |
| 292 | switch(sock->family){ |
| 293 | case AF_UNIX: |
| 294 | fd = sock->fd; |
| 295 | other = sock->other; |
| 296 | qunlock(cp); |
| 297 | |
| 298 | err = -ECONNREFUSED; |
| 299 | srvname(tmp, cp->str, sizeof(buf)); |
| 300 | if((cfd = open(tmp, ORDWR)) < 0) |
| 301 | break; |
| 302 | |
| 303 | memset(buf, 0, sizeof(buf)); |
| 304 | snprint(buf, sizeof(buf), "linuxemu.%d.%lux", getpid(), (ulong)sock); |
| 305 | if(srvunixsock(other, buf) < 0){ |
| 306 | close(cfd); |
| 307 | break; |
| 308 | } |
| 309 | |
| 310 | /* |
| 311 | * write Ctrlsize-1 bytes so concurrent writes will not be merged together as |
| 312 | * Ctrlsize-1 is the size used in read(). see /sys/src/ape/lib/bsd/accept.c:87 |
| 313 | * this should be fixed in ape's connect() as well. |
| 314 | */ |
| 315 | if(write(cfd, buf, sizeof(buf)-1) != sizeof(buf)-1){ |
| 316 | close(cfd); |
| 317 | unsrvunixsock(buf); |
| 318 | break; |
| 319 | } |
| 320 | close(cfd); |
| 321 | if((read(fd, tmp, strlen(buf)) != strlen(buf)) || memcmp(buf, tmp, strlen(buf))){ |
| 322 | unsrvunixsock(buf); |
| 323 | break; |
| 324 | } |
| 325 | unsrvunixsock(buf); |
| 326 | err = 0; |
| 327 | break; |
| 328 | |
| 329 | default: |
| 330 | snprint(buf, sizeof(buf), "%s/ctl", sock->name); |
| 331 | qunlock(cp); |
| 332 | if((cfd = open(buf, ORDWR)) < 0){ |
| 333 | err = mkerror(); |
| 334 | break; |
| 335 | } |
| 336 | if(fprint(cfd, "connect %s", cp->str) < 0) |
| 337 | err = mkerror(); |
| 338 | close(cfd); |
| 339 | } |
| 340 | |
| 341 | qlock(cp); |
| 342 | if((sock = cp->sock) == nil) |
| 343 | goto out; |
| 344 | if(err == 0){ |
| 345 | close(sock->other); |
| 346 | sock->other = -1; |
| 347 | sock->connected = 1; |
| 348 | } |
| 349 | sock->error = err; |
| 350 | out: |
| 351 | wakeq(&cp->wq, MAXPROC); |
| 352 | qunlock(cp); |
| 353 | freeconnectproc(cp); |
| 354 | } |
| 355 | |
| 356 | static int |
| 357 | sockaddr2str(Socket *sock, uchar *addr, int addrlen, char *buf, int nbuf) |
| 358 | { |
| 359 | int err; |
| 360 | |
| 361 | err = -EINVAL; |
| 362 | switch(sock->family){ |
| 363 | case AF_INET: |
| 364 | if(addrlen < 8) |
| 365 | break; |
| 366 | err = snprint(buf, nbuf, "%d.%d.%d.%d!%d", |
| 367 | (int)(addr[4]), |
| 368 | (int)(addr[5]), |
| 369 | (int)(addr[6]), |
| 370 | (int)(addr[7]), |
| 371 | (int)(((ulong)addr[2]<<8)|(ulong)addr[3])); |
| 372 | break; |
| 373 | |
| 374 | case AF_INET6: |
| 375 | /* TODO */ |
| 376 | break; |
| 377 | |
| 378 | case AF_UNIX: |
| 379 | if(addrlen <= 2) |
| 380 | break; |
| 381 | addrlen -= 2; |
| 382 | if(addrlen >= nbuf) |
| 383 | addrlen = nbuf-1; |
| 384 | memmove(buf, addr+2, addrlen); |
| 385 | buf[addrlen] = 0; |
| 386 | err = addrlen; |
| 387 | break; |
| 388 | } |
| 389 | |
| 390 | return err; |
| 391 | } |
| 392 | |
| 393 | static int |
| 394 | connectsock(Socket *sock, uchar *addr, int addrlen) |
| 395 | { |
| 396 | Connectproc *cp; |
| 397 | int err; |
| 398 | char buf[Ctlsize]; |
| 399 | int pid; |
| 400 | |
| 401 | if(sock->connected) |
| 402 | return -EISCONN; |
| 403 | if(sock->connectproc) |
| 404 | return -EALREADY; |
| 405 | |
| 406 | if((err = sockaddr2str(sock, addr, addrlen, buf, sizeof(buf))) < 0) |
| 407 | return err; |
| 408 | |
| 409 | cp = kmallocz(sizeof(*cp), 1); |
| 410 | cp->ref = 2; |
| 411 | cp->sock = sock; |
| 412 | strncpy(cp->str, buf, sizeof(cp->str)); |
| 413 | |
| 414 | qlock(cp); |
| 415 | sock->error = 0; |
| 416 | if((pid = procfork(connectproc, cp, 0)) < 0){ |
| 417 | qunlock(cp); |
| 418 | free(cp); |
| 419 | return mkerror(); |
| 420 | } |
| 421 | snprint(buf, sizeof(buf), "/proc/%d/note", pid); |
| 422 | cp->notefd = open(buf, OWRITE); |
| 423 | |
| 424 | if(addrlen > sizeof(sock->addr)) |
| 425 | addrlen = sizeof(sock->addr); |
| 426 | sock->naddr = addrlen; |
| 427 | memmove(sock->addr, addr, addrlen); |
| 428 | |
| 429 | sock->connectproc = cp; |
| 430 | if(sock->mode & O_NONBLOCK){ |
| 431 | qunlock(cp); |
| 432 | return -EINPROGRESS; |
| 433 | } |
| 434 | if((err = sleepq(&cp->wq, cp, 1)) == 0) |
| 435 | err = sock->error; |
| 436 | qunlock(cp); |
| 437 | |
| 438 | /* |
| 439 | * crazy shit is going on! |
| 440 | * see: http://www.madore.org/~david/computers/connect-intr.html |
| 441 | */ |
| 442 | if(err != -EINTR && err != -ERESTART){ |
| 443 | sock->connectproc = nil; |
| 444 | freeconnectproc(cp); |
| 445 | } |
| 446 | return err; |
| 447 | } |
| 448 | |
| 449 | static int |
| 450 | shutdownsock(Socket *sock, int how) |
| 451 | { |
| 452 | USED(how); |
| 453 | |
| 454 | freebufproc(sock->bufproc); |
| 455 | sock->bufproc = nil; |
| 456 | freeconnectproc(sock->connectproc); |
| 457 | sock->connectproc = nil; |
| 458 | freelistenproc(sock->listenproc); |
| 459 | sock->listenproc = nil; |
| 460 | close(sock->fd); |
| 461 | sock->fd = -1; |
| 462 | sock->connected = 0; |
| 463 | |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | static int |
| 468 | bindsock(Socket *sock, uchar *addr, int addrlen) |
| 469 | { |
| 470 | int port; |
| 471 | int cfd; |
| 472 | char buf[Ctlsize]; |
| 473 | |
| 474 | port = -1; |
| 475 | switch(sock->family){ |
| 476 | default: |
| 477 | return -EINVAL; |
| 478 | |
| 479 | case AF_UNIX: |
| 480 | break; |
| 481 | case AF_INET: |
| 482 | if(addrlen < 4) |
| 483 | return -EINVAL; |
| 484 | port = (int)(((ulong)addr[2]<<8)|(ulong)addr[3]); |
| 485 | break; |
| 486 | case AF_INET6: |
| 487 | /* TODO */ |
| 488 | return -EINVAL; |
| 489 | } |
| 490 | |
| 491 | if(port >= 0){ |
| 492 | snprint(buf, sizeof(buf), "%s/ctl", sock->name); |
| 493 | if((cfd = open(buf, ORDWR)) < 0) |
| 494 | return mkerror(); |
| 495 | if((fprint(cfd, "announce %d", port) < 0) || (fprint(cfd, "bind %d", port) < 0)){ |
| 496 | close(cfd); |
| 497 | return mkerror(); |
| 498 | } |
| 499 | close(cfd); |
| 500 | } |
| 501 | |
| 502 | if(addrlen > sizeof(sock->addr)) |
| 503 | addrlen = sizeof(sock->addr); |
| 504 | sock->naddr = addrlen; |
| 505 | memmove(sock->addr, addr, addrlen); |
| 506 | |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | static int |
| 511 | strtoip(char *str, uchar *ip, int iplen) |
| 512 | { |
| 513 | int i, d, v6; |
| 514 | char *p, *k; |
| 515 | |
| 516 | i = 0; |
| 517 | v6 = 1; |
| 518 | memset(ip, 0, iplen); |
| 519 | for(p = str; *p; p++){ |
| 520 | if(*p == ':'){ |
| 521 | if(p[1] == ':'){ |
| 522 | p++; |
| 523 | i = iplen; |
| 524 | for(k = p+1; *k; k++){ |
| 525 | if(*k == ':'){ |
| 526 | v6 = 1; |
| 527 | i -= 2; |
| 528 | } |
| 529 | if(*k == '.'){ |
| 530 | v6 = 0; |
| 531 | i -= 1; |
| 532 | } |
| 533 | } |
| 534 | i -= v6+1; |
| 535 | } else { |
| 536 | i += 2; |
| 537 | } |
| 538 | continue; |
| 539 | } else if(*p == '.'){ |
| 540 | i++; |
| 541 | continue; |
| 542 | } |
| 543 | |
| 544 | for(k = p; *k && *k != '.' && *k != ':'; k++) |
| 545 | ; |
| 546 | if(*k == '.'){ |
| 547 | v6 = 0; |
| 548 | } else if(*k == ':'){ |
| 549 | v6 = 1; |
| 550 | } |
| 551 | |
| 552 | if(i < 0 || i + v6+1 > iplen) |
| 553 | return -1; |
| 554 | |
| 555 | if(*p >= '0' && *p <= '9'){ |
| 556 | d = *p - '0'; |
| 557 | } else if(v6 && (*p >= 'a' && *p <= 'f')){ |
| 558 | d = 0x0A + *p - 'a'; |
| 559 | } else if(v6 && (*p >= 'A' && *p <= 'F')){ |
| 560 | d = 0x0A + *p - 'A'; |
| 561 | } else { |
| 562 | return -1; |
| 563 | } |
| 564 | |
| 565 | if(v6){ |
| 566 | d |= ((int)ip[i]<<12 | (int)ip[i+1]<<4); |
| 567 | ip[i] = (d>>8) & 0xFF; |
| 568 | ip[i+1] = d & 0xFF; |
| 569 | } else { |
| 570 | ip[i] = ip[i]*10 + d; |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | return i + v6+1; |
| 575 | } |
| 576 | |
| 577 | static int |
| 578 | getsockaddr(Socket *sock, int remote, uchar *addr, int len) |
| 579 | { |
| 580 | char buf[Ctlsize]; |
| 581 | char *p; |
| 582 | uchar *a; |
| 583 | int fd; |
| 584 | int n, port; |
| 585 | |
| 586 | a = addr; |
| 587 | switch(sock->family){ |
| 588 | case AF_UNIX: |
| 589 | if(len < sock->naddr) |
| 590 | break; |
| 591 | memmove(a, sock->addr, sock->naddr); |
| 592 | return sock->naddr; |
| 593 | case AF_INET: |
| 594 | case AF_INET6: |
| 595 | snprint(buf, sizeof(buf), "%s/%s", sock->name, remote?"remote":"local"); |
| 596 | if((fd = open(buf, OREAD)) < 0) |
| 597 | return mkerror(); |
| 598 | if((n = read(fd, buf, sizeof(buf)-1)) < 0){ |
| 599 | close(fd); |
| 600 | return mkerror(); |
| 601 | } |
| 602 | close(fd); |
| 603 | if(n > 0 && buf[n-1] == '\n') |
| 604 | n--; |
| 605 | buf[n] = 0; |
| 606 | break; |
| 607 | default: |
| 608 | return -EINVAL; |
| 609 | } |
| 610 | |
| 611 | if((p = strrchr(buf, '!')) == nil) |
| 612 | return -EINVAL; |
| 613 | *p++ = 0; |
| 614 | port = atoi(p); |
| 615 | |
| 616 | trace("getsockaddr(): ip=%s port=%d", buf, port); |
| 617 | |
| 618 | switch(sock->family){ |
| 619 | case AF_INET: |
| 620 | if(len < 8) |
| 621 | break; |
| 622 | if(len > 16) |
| 623 | len = 16; |
| 624 | memset(a, 0, len); |
| 625 | a[0] = sock->family & 0xFF; |
| 626 | a[1] = (sock->family>>8) & 0xFF; |
| 627 | a[2] = (port >> 8) & 0xFF; |
| 628 | a[3] = port & 0xFF; |
| 629 | if(strtoip(buf, &a[4], 4) < 0) |
| 630 | break; |
| 631 | return len; |
| 632 | |
| 633 | case AF_INET6: |
| 634 | /* TODO */ |
| 635 | break; |
| 636 | } |
| 637 | |
| 638 | return -EINVAL; |
| 639 | } |
| 640 | |
| 641 | static void |
| 642 | listenproc(void *aux) |
| 643 | { |
| 644 | Listenproc *lp; |
| 645 | Socket *sock, *q; |
| 646 | char buf[Ctlsize], tmp[8+Ctlsize+1]; |
| 647 | int cfd, fd, n; |
| 648 | |
| 649 | lp = (Listenproc*)aux; |
| 650 | qlock(lp); |
| 651 | if((sock = lp->sock) == nil) |
| 652 | goto out; |
| 653 | |
| 654 | snprint(buf, sizeof(buf), "listenproc() %s", lp->str); |
| 655 | setprocname(buf); |
| 656 | |
| 657 | for(;;){ |
| 658 | n = 0; |
| 659 | cfd = -1; |
| 660 | switch(sock->family){ |
| 661 | case AF_UNIX: |
| 662 | srvunixsock(sock->other, lp->str); |
| 663 | close(sock->other); |
| 664 | sock->other = -1; |
| 665 | fd = sock->fd; |
| 666 | qunlock(lp); |
| 667 | n = read(fd, buf, sizeof(buf)-1); |
| 668 | qlock(lp); |
| 669 | break; |
| 670 | |
| 671 | default: |
| 672 | snprint(buf, sizeof(buf), "%s/listen", sock->name); |
| 673 | qunlock(lp); |
| 674 | if((cfd = open(buf, ORDWR)) >= 0) |
| 675 | n = read(cfd, buf, sizeof(buf)-1); |
| 676 | qlock(lp); |
| 677 | if(n <= 0) |
| 678 | close(cfd); |
| 679 | } |
| 680 | if(n <= 0) |
| 681 | break; |
| 682 | buf[n] = 0; |
| 683 | |
| 684 | if((sock = lp->sock) == nil){ |
| 685 | close(cfd); |
| 686 | break; |
| 687 | } |
| 688 | |
| 689 | switch(sock->family){ |
| 690 | case AF_UNIX: |
| 691 | srvname(tmp, buf, sizeof(tmp)); |
| 692 | if((fd = open(tmp, ORDWR)) < 0) |
| 693 | break; |
| 694 | unsrvunixsock(buf); |
| 695 | if(write(fd, buf, strlen(buf)) != strlen(buf)){ |
| 696 | close(fd); |
| 697 | fd = -1; |
| 698 | } |
| 699 | buf[0] = 0; |
| 700 | break; |
| 701 | |
| 702 | default: |
| 703 | n = atoi(buf); |
| 704 | snprint(buf, sizeof(buf), "%s/%d", sock->net, n); |
| 705 | snprint(tmp, sizeof(tmp), "%s/data", buf); |
| 706 | fd = open(tmp, ORDWR); |
| 707 | close(cfd); |
| 708 | break; |
| 709 | } |
| 710 | |
| 711 | if(fd < 0) |
| 712 | continue; |
| 713 | |
| 714 | q = allocsock(sock->family, sock->stype, sock->protocol); |
| 715 | strncpy(q->net, sock->net, sizeof(q->net)); |
| 716 | strncpy(q->name, buf, sizeof(q->name)); |
| 717 | |
| 718 | if(sock->family == AF_UNIX){ |
| 719 | memmove(q->addr, sock->addr, q->naddr = sock->naddr); |
| 720 | } else { |
| 721 | q->naddr = getsockaddr(q, 0, q->addr, sizeof(q->addr)); |
| 722 | } |
| 723 | |
| 724 | q->fd = fd; |
| 725 | q->connected = 1; |
| 726 | q->next = lp->q; |
| 727 | lp->q = q; |
| 728 | wakeq(&lp->wq, MAXPROC); |
| 729 | } |
| 730 | |
| 731 | if(sock->family == AF_UNIX) |
| 732 | unsrvunixsock(lp->str); |
| 733 | out: |
| 734 | wakeq(&lp->wq, MAXPROC); |
| 735 | qunlock(lp); |
| 736 | freelistenproc(lp); |
| 737 | } |
| 738 | |
| 739 | |
| 740 | static int |
| 741 | listensock(Socket *sock) |
| 742 | { |
| 743 | Listenproc *lp; |
| 744 | int pid, err; |
| 745 | char buf[Ctlsize]; |
| 746 | |
| 747 | trace("listensock()"); |
| 748 | |
| 749 | if(sock->listenproc) |
| 750 | return 0; |
| 751 | if((err = sockaddr2str(sock, sock->addr, sock->naddr, buf, sizeof(buf))) < 0) |
| 752 | return err; |
| 753 | |
| 754 | lp = kmallocz(sizeof(*lp), 1); |
| 755 | lp->ref = 2; |
| 756 | lp->sock = sock; |
| 757 | strncpy(lp->str, buf, sizeof(lp->str)); |
| 758 | |
| 759 | qlock(lp); |
| 760 | if((pid = procfork(listenproc, lp, 0)) < 0){ |
| 761 | qunlock(lp); |
| 762 | free(lp); |
| 763 | return mkerror(); |
| 764 | } |
| 765 | snprint(buf, sizeof(buf), "/proc/%d/note", pid); |
| 766 | lp->notefd = open(buf, OWRITE); |
| 767 | sock->listenproc = lp; |
| 768 | qunlock(lp); |
| 769 | |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | static int |
| 774 | getsockname(Socket *sock, uchar *addr, int *paddrlen) |
| 775 | { |
| 776 | int ret; |
| 777 | |
| 778 | trace("getsockname(%p, %p, %p (%x))", sock, addr, paddrlen, paddrlen ? *paddrlen : 0); |
| 779 | |
| 780 | if(addr == nil || paddrlen == nil) |
| 781 | return -EINVAL; |
| 782 | |
| 783 | ret = sock->naddr; |
| 784 | memmove(addr, sock->addr, ret); |
| 785 | *paddrlen = ret; |
| 786 | |
| 787 | return ret; |
| 788 | } |
| 789 | |
| 790 | static int |
| 791 | getpeername(Socket *sock, uchar *addr, int *paddrlen) |
| 792 | { |
| 793 | int ret; |
| 794 | |
| 795 | trace("getpeername(%p, %p, %p (%x))", sock, addr, paddrlen, paddrlen ? *paddrlen : 0); |
| 796 | |
| 797 | if(addr == nil || paddrlen == nil) |
| 798 | return -EINVAL; |
| 799 | |
| 800 | if((ret = getsockaddr(sock, 1, addr, *paddrlen)) > 0) |
| 801 | *paddrlen = ret; |
| 802 | return ret; |
| 803 | } |
| 804 | |
| 805 | static int |
| 806 | acceptsock(Socket *sock, uchar *addr, int *paddrlen) |
| 807 | { |
| 808 | Listenproc *lp; |
| 809 | Socket *nsock; |
| 810 | int err; |
| 811 | |
| 812 | trace("acceptsock(%p, %p, %p (%x))", sock, addr, paddrlen, paddrlen ? *paddrlen : 0); |
| 813 | |
| 814 | if((lp = sock->listenproc) == nil) |
| 815 | return -EINVAL; |
| 816 | |
| 817 | qlock(lp); |
| 818 | for(;;){ |
| 819 | if(nsock = lp->q){ |
| 820 | lp->q = nsock->next; |
| 821 | nsock->next = nil; |
| 822 | qunlock(lp); |
| 823 | |
| 824 | if(addr != nil && paddrlen != nil){ |
| 825 | err = getsockaddr(nsock, 1, addr, *paddrlen); |
| 826 | *paddrlen = err < 0 ? 0 : err; |
| 827 | } |
| 828 | return newfd(nsock, FD_CLOEXEC); |
| 829 | } |
| 830 | |
| 831 | if(sock->mode & O_NONBLOCK){ |
| 832 | err = -EAGAIN; |
| 833 | break; |
| 834 | } |
| 835 | |
| 836 | if((err = sleepq(&lp->wq, lp, 1)) < 0) |
| 837 | break; |
| 838 | } |
| 839 | qunlock(lp); |
| 840 | |
| 841 | return err; |
| 842 | } |
| 843 | |
| 844 | static int |
| 845 | socketpair(int family, int stype, int protocol, int sv[2]) |
| 846 | { |
| 847 | Socket *sock; |
| 848 | int p[2]; |
| 849 | int i, fd; |
| 850 | |
| 851 | trace("socketpair(%d, %d, %d, %p)", family, stype, protocol, sv); |
| 852 | |
| 853 | if(family != AF_UNIX) |
| 854 | return -EAFNOSUPPORT; |
| 855 | if(pipe(p) < 0) |
| 856 | return mkerror(); |
| 857 | for(i=0; i<2; i++){ |
| 858 | sock = allocsock(family, stype, protocol); |
| 859 | sock->fd = p[i]; |
| 860 | sock->connected = 1; |
| 861 | if((fd = newfd(sock, FD_CLOEXEC)) < 0){ |
| 862 | if(i > 0) |
| 863 | sys_close(sv[0]); |
| 864 | close(p[0]); |
| 865 | close(p[1]); |
| 866 | return fd; |
| 867 | } |
| 868 | sv[i] = fd; |
| 869 | } |
| 870 | return 0; |
| 871 | } |
| 872 | |
| 873 | static void* |
| 874 | bufprocsock(Socket *sock) |
| 875 | { |
| 876 | if(sock->bufproc == nil) |
| 877 | sock->bufproc = newbufproc(sock->fd); |
| 878 | return sock->bufproc; |
| 879 | } |
| 880 | |
| 881 | static int |
| 882 | pollsock(Ufile *file, void *tab) |
| 883 | { |
| 884 | Socket *sock = (Socket*)file; |
| 885 | Listenproc *lp; |
| 886 | Connectproc *cp; |
| 887 | |
| 888 | if(!sock->connected){ |
| 889 | if(lp = sock->listenproc){ |
| 890 | qlock(lp); |
| 891 | pollwait(file, &lp->wq, tab); |
| 892 | if(lp->q){ |
| 893 | qunlock(lp); |
| 894 | return POLLIN; |
| 895 | } |
| 896 | qunlock(lp); |
| 897 | } |
| 898 | if(cp = sock->connectproc){ |
| 899 | qlock(cp); |
| 900 | pollwait(file, &cp->wq, tab); |
| 901 | if(sock->error < 0){ |
| 902 | qunlock(cp); |
| 903 | return POLLOUT; |
| 904 | } |
| 905 | qunlock(cp); |
| 906 | } |
| 907 | return 0; |
| 908 | } |
| 909 | |
| 910 | return pollbufproc(bufprocsock(sock), sock, tab); |
| 911 | } |
| 912 | |
| 913 | static int |
| 914 | readsock(Ufile *file, void *buf, int len, vlong) |
| 915 | { |
| 916 | Socket *sock = (Socket*)file; |
| 917 | int ret; |
| 918 | |
| 919 | if(!sock->connected) |
| 920 | return -ENOTCONN; |
| 921 | if((sock->mode & O_NONBLOCK) || (sock->bufproc != nil)){ |
| 922 | ret = readbufproc(bufprocsock(sock), buf, len, 0, (sock->mode & O_NONBLOCK)); |
| 923 | } else { |
| 924 | if(notifyme(1)) |
| 925 | return -ERESTART; |
| 926 | ret = read(sock->fd, buf, len); |
| 927 | notifyme(0); |
| 928 | if(ret < 0) |
| 929 | ret = mkerror(); |
| 930 | } |
| 931 | return ret; |
| 932 | } |
| 933 | |
| 934 | extern int pipewrite(int fd, void *buf, int len); |
| 935 | |
| 936 | static int |
| 937 | writesock(Ufile *file, void *buf, int len, vlong) |
| 938 | { |
| 939 | Socket *sock = (Socket*)file; |
| 940 | int ret; |
| 941 | |
| 942 | if(!sock->connected) |
| 943 | return -ENOTCONN; |
| 944 | if(sock->family == AF_UNIX) |
| 945 | return pipewrite(sock->fd, buf, len); |
| 946 | if(notifyme(1)) |
| 947 | return -ERESTART; |
| 948 | ret = write(sock->fd, buf, len); |
| 949 | notifyme(0); |
| 950 | if(ret < 0) |
| 951 | ret = mkerror(); |
| 952 | return ret; |
| 953 | } |
| 954 | |
| 955 | static int |
| 956 | ioctlsock(Ufile *file, int cmd, void *arg) |
| 957 | { |
| 958 | Socket *sock = (Socket*)file; |
| 959 | |
| 960 | switch(cmd){ |
| 961 | default: |
| 962 | return -ENOTTY; |
| 963 | case 0x541B: |
| 964 | { |
| 965 | int r; |
| 966 | |
| 967 | if(arg == nil) |
| 968 | return -EINVAL; |
| 969 | if((r = nreadablebufproc(bufprocsock(sock))) < 0){ |
| 970 | *((int*)arg) = 0; |
| 971 | return r; |
| 972 | } |
| 973 | *((int*)arg) = r; |
| 974 | } |
| 975 | return 0; |
| 976 | } |
| 977 | } |
| 978 | |
| 979 | static int |
| 980 | sendto(Socket *sock, void *data, int len, int, uchar *, int) |
| 981 | { |
| 982 | trace("sendto(%p, %p, %d, ...)", sock, data, len); |
| 983 | |
| 984 | return writesock(sock, data, len, sock->off); |
| 985 | } |
| 986 | |
| 987 | static int |
| 988 | recvfrom(Socket *sock, void *data, int len, int flags, uchar *addr, int addrlen) |
| 989 | { |
| 990 | int ret; |
| 991 | |
| 992 | trace("recvfrom(%p, %p, %d, %x, %p, %d)", sock, data, len, flags, addr, addrlen); |
| 993 | |
| 994 | if(flags & 2){ |
| 995 | if(!sock->connected) |
| 996 | return -ENOTCONN; |
| 997 | ret = readbufproc(bufprocsock(sock), data, len, 1, 1); |
| 998 | } else { |
| 999 | ret = readsock(sock, data, len, sock->off); |
| 1000 | } |
| 1001 | if(addr){ |
| 1002 | memmove(addr, sock->addr, sock->naddr); |
| 1003 | } |
| 1004 | return ret; |
| 1005 | } |
| 1006 | |
| 1007 | enum { |
| 1008 | SOL_SOCKET = 1, |
| 1009 | |
| 1010 | SO_DEBUG = 1, |
| 1011 | SO_REUSEADDR, |
| 1012 | SO_TYPE, |
| 1013 | SO_ERROR, |
| 1014 | }; |
| 1015 | |
| 1016 | static int |
| 1017 | getoptsock(Socket *sock, int lvl, int opt, char *ov, int *ol) |
| 1018 | { |
| 1019 | trace("getoptsock(%p, %d, %d, %p, %p)", sock, lvl, opt, ov, ol); |
| 1020 | |
| 1021 | switch(lvl){ |
| 1022 | default: |
| 1023 | Default: |
| 1024 | return -EINVAL; |
| 1025 | |
| 1026 | case SOL_SOCKET: |
| 1027 | switch(opt){ |
| 1028 | default: |
| 1029 | goto Default; |
| 1030 | case SO_ERROR: |
| 1031 | *ol = sizeof(int); |
| 1032 | *((int*)ov) = sock->error; |
| 1033 | break; |
| 1034 | } |
| 1035 | break; |
| 1036 | } |
| 1037 | |
| 1038 | return 0; |
| 1039 | } |
| 1040 | |
| 1041 | enum { |
| 1042 | SYS_SOCKET=1, |
| 1043 | SYS_BIND, |
| 1044 | SYS_CONNECT, |
| 1045 | SYS_LISTEN, |
| 1046 | SYS_ACCEPT, |
| 1047 | SYS_GETSOCKNAME, |
| 1048 | SYS_GETPEERNAME, |
| 1049 | SYS_SOCKETPAIR, |
| 1050 | SYS_SEND, |
| 1051 | SYS_RECV, |
| 1052 | SYS_SENDTO, |
| 1053 | SYS_RECVFROM, |
| 1054 | SYS_SHUTDOWN, |
| 1055 | SYS_SETSOCKOPT, |
| 1056 | SYS_GETSOCKOPT, |
| 1057 | SYS_SENDMSG, |
| 1058 | SYS_RECVMSG, |
| 1059 | }; |
| 1060 | |
| 1061 | int sys_linux_socketcall(int call, int *arg) |
| 1062 | { |
| 1063 | Socket *sock; |
| 1064 | int ret; |
| 1065 | |
| 1066 | trace("sys_linux_socketcall(%d, %p)", call, arg); |
| 1067 | |
| 1068 | if(call == SYS_SOCKET) |
| 1069 | return newsock(arg[0], arg[1], arg[2]); |
| 1070 | |
| 1071 | if(call == SYS_SOCKETPAIR) |
| 1072 | return socketpair(arg[0], arg[1], arg[2], (int*)arg[3]); |
| 1073 | |
| 1074 | if((sock = (Socket*)fdgetfile(arg[0])) == nil) |
| 1075 | return -EBADF; |
| 1076 | |
| 1077 | if(sock->dev != SOCKDEV){ |
| 1078 | putfile(sock); |
| 1079 | return -ENOTSOCK; |
| 1080 | } |
| 1081 | |
| 1082 | ret = -1; |
| 1083 | switch(call){ |
| 1084 | case SYS_CONNECT: |
| 1085 | ret = connectsock(sock, (void*)arg[1], arg[2]); |
| 1086 | break; |
| 1087 | case SYS_SENDTO: |
| 1088 | ret = sendto(sock, (void*)arg[1], arg[2], arg[3], (void*)arg[4], arg[5]); |
| 1089 | break; |
| 1090 | case SYS_RECVFROM: |
| 1091 | ret = recvfrom(sock, (void*)arg[1], arg[2], arg[3], (void*)arg[4], arg[5]); |
| 1092 | break; |
| 1093 | case SYS_SEND: |
| 1094 | ret = sendto(sock, (void*)arg[1], arg[2], arg[3], nil, 0); |
| 1095 | break; |
| 1096 | case SYS_RECV: |
| 1097 | ret = recvfrom(sock, (void*)arg[1], arg[2], arg[3], nil, 0); |
| 1098 | break; |
| 1099 | case SYS_GETSOCKNAME: |
| 1100 | ret = getsockname(sock, (void*)arg[1], (void*)arg[2]); |
| 1101 | break; |
| 1102 | case SYS_GETPEERNAME: |
| 1103 | ret = getpeername(sock, (void*)arg[1], (void*)arg[2]); |
| 1104 | break; |
| 1105 | case SYS_SHUTDOWN: |
| 1106 | ret = shutdownsock(sock, arg[1]); |
| 1107 | break; |
| 1108 | case SYS_BIND: |
| 1109 | ret = bindsock(sock, (void*)arg[1], arg[2]); |
| 1110 | break; |
| 1111 | case SYS_LISTEN: |
| 1112 | ret = listensock(sock); |
| 1113 | break; |
| 1114 | case SYS_ACCEPT: |
| 1115 | ret = acceptsock(sock, (void*)arg[1], (void*)arg[2]); |
| 1116 | break; |
| 1117 | case SYS_SETSOCKOPT: |
| 1118 | ret = 0; |
| 1119 | break; |
| 1120 | case SYS_GETSOCKOPT: |
| 1121 | ret = getoptsock(sock, (int)arg[1], (int)arg[2], (char*)arg[3], (int*)arg[4]); |
| 1122 | break; |
| 1123 | case SYS_SENDMSG: |
| 1124 | case SYS_RECVMSG: |
| 1125 | default: |
| 1126 | trace("socketcall(): call %d not implemented", call); |
| 1127 | } |
| 1128 | |
| 1129 | putfile(sock); |
| 1130 | |
| 1131 | return ret; |
| 1132 | } |
| 1133 | |
| 1134 | static void |
| 1135 | fillstat(Ustat *s) |
| 1136 | { |
| 1137 | s->mode = 0666 | S_IFSOCK; |
| 1138 | s->uid = current->uid; |
| 1139 | s->gid = current->gid; |
| 1140 | s->size = 0; |
| 1141 | } |
| 1142 | |
| 1143 | static int |
| 1144 | fstatsock(Ufile *, Ustat *s) |
| 1145 | { |
| 1146 | fillstat(s); |
| 1147 | return 0; |
| 1148 | }; |
| 1149 | |
| 1150 | static Udev sockdev = |
| 1151 | { |
| 1152 | .read = readsock, |
| 1153 | .write = writesock, |
| 1154 | .poll = pollsock, |
| 1155 | .close = closesock, |
| 1156 | .ioctl = ioctlsock, |
| 1157 | .fstat = fstatsock, |
| 1158 | }; |
| 1159 | |
| 1160 | void sockdevinit(void) |
| 1161 | { |
| 1162 | devtab[SOCKDEV] = &sockdev; |
| 1163 | } |