1 /*- 2 * Copyright (c) 1998-2011 Dag-Erling Smørgrav 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/socket.h> 31 #include <sys/time.h> 32 #include <sys/uio.h> 33 34 #include <netinet/in.h> 35 36 #include <ctype.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <netdb.h> 40 #include <pwd.h> 41 #include <stdarg.h> 42 #include <stdlib.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "fetch.h" 48 #include "common.h" 49 50 51 /*** Local data **************************************************************/ 52 53 /* 54 * Error messages for resolver errors 55 */ 56 static struct fetcherr netdb_errlist[] = { 57 #ifdef EAI_NODATA 58 { EAI_NODATA, FETCH_RESOLV, "Host not found" }, 59 #endif 60 { EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" }, 61 { EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" }, 62 { EAI_NONAME, FETCH_RESOLV, "No address record" }, 63 { -1, FETCH_UNKNOWN, "Unknown resolver error" } 64 }; 65 66 /* End-of-Line */ 67 static const char ENDL[2] = "\r\n"; 68 69 70 /*** Error-reporting functions ***********************************************/ 71 72 /* 73 * Map error code to string 74 */ 75 static struct fetcherr * 76 fetch_finderr(struct fetcherr *p, int e) 77 { 78 while (p->num != -1 && p->num != e) 79 p++; 80 return (p); 81 } 82 83 /* 84 * Set error code 85 */ 86 void 87 fetch_seterr(struct fetcherr *p, int e) 88 { 89 p = fetch_finderr(p, e); 90 fetchLastErrCode = p->cat; 91 snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string); 92 } 93 94 /* 95 * Set error code according to errno 96 */ 97 void 98 fetch_syserr(void) 99 { 100 switch (errno) { 101 case 0: 102 fetchLastErrCode = FETCH_OK; 103 break; 104 case EPERM: 105 case EACCES: 106 case EROFS: 107 case EAUTH: 108 case ENEEDAUTH: 109 fetchLastErrCode = FETCH_AUTH; 110 break; 111 case ENOENT: 112 case EISDIR: /* XXX */ 113 fetchLastErrCode = FETCH_UNAVAIL; 114 break; 115 case ENOMEM: 116 fetchLastErrCode = FETCH_MEMORY; 117 break; 118 case EBUSY: 119 case EAGAIN: 120 fetchLastErrCode = FETCH_TEMP; 121 break; 122 case EEXIST: 123 fetchLastErrCode = FETCH_EXISTS; 124 break; 125 case ENOSPC: 126 fetchLastErrCode = FETCH_FULL; 127 break; 128 case EADDRINUSE: 129 case EADDRNOTAVAIL: 130 case ENETDOWN: 131 case ENETUNREACH: 132 case ENETRESET: 133 case EHOSTUNREACH: 134 fetchLastErrCode = FETCH_NETWORK; 135 break; 136 case ECONNABORTED: 137 case ECONNRESET: 138 fetchLastErrCode = FETCH_ABORT; 139 break; 140 case ETIMEDOUT: 141 fetchLastErrCode = FETCH_TIMEOUT; 142 break; 143 case ECONNREFUSED: 144 case EHOSTDOWN: 145 fetchLastErrCode = FETCH_DOWN; 146 break; 147 default: 148 fetchLastErrCode = FETCH_UNKNOWN; 149 } 150 snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno)); 151 } 152 153 154 /* 155 * Emit status message 156 */ 157 void 158 fetch_info(const char *fmt, ...) 159 { 160 va_list ap; 161 162 va_start(ap, fmt); 163 vfprintf(stderr, fmt, ap); 164 va_end(ap); 165 fputc('\n', stderr); 166 } 167 168 169 /*** Network-related utility functions ***************************************/ 170 171 /* 172 * Return the default port for a scheme 173 */ 174 int 175 fetch_default_port(const char *scheme) 176 { 177 struct servent *se; 178 179 if ((se = getservbyname(scheme, "tcp")) != NULL) 180 return (ntohs(se->s_port)); 181 if (strcasecmp(scheme, SCHEME_FTP) == 0) 182 return (FTP_DEFAULT_PORT); 183 if (strcasecmp(scheme, SCHEME_HTTP) == 0) 184 return (HTTP_DEFAULT_PORT); 185 return (0); 186 } 187 188 /* 189 * Return the default proxy port for a scheme 190 */ 191 int 192 fetch_default_proxy_port(const char *scheme) 193 { 194 if (strcasecmp(scheme, SCHEME_FTP) == 0) 195 return (FTP_DEFAULT_PROXY_PORT); 196 if (strcasecmp(scheme, SCHEME_HTTP) == 0) 197 return (HTTP_DEFAULT_PROXY_PORT); 198 return (0); 199 } 200 201 202 /* 203 * Create a connection for an existing descriptor. 204 */ 205 conn_t * 206 fetch_reopen(int sd) 207 { 208 conn_t *conn; 209 int opt = 1; 210 211 /* allocate and fill connection structure */ 212 if ((conn = calloc(1, sizeof(*conn))) == NULL) 213 return (NULL); 214 fcntl(sd, F_SETFD, FD_CLOEXEC); 215 setsockopt(sd, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof opt); 216 conn->sd = sd; 217 ++conn->ref; 218 return (conn); 219 } 220 221 222 /* 223 * Bump a connection's reference count. 224 */ 225 conn_t * 226 fetch_ref(conn_t *conn) 227 { 228 229 ++conn->ref; 230 return (conn); 231 } 232 233 234 /* 235 * Bind a socket to a specific local address 236 */ 237 int 238 fetch_bind(int sd, int af, const char *addr) 239 { 240 struct addrinfo hints, *res, *res0; 241 int err; 242 243 memset(&hints, 0, sizeof(hints)); 244 hints.ai_family = af; 245 hints.ai_socktype = SOCK_STREAM; 246 hints.ai_protocol = 0; 247 if ((err = getaddrinfo(addr, NULL, &hints, &res0)) != 0) 248 return (-1); 249 for (res = res0; res; res = res->ai_next) 250 if (bind(sd, res->ai_addr, res->ai_addrlen) == 0) 251 return (0); 252 return (-1); 253 } 254 255 256 /* 257 * Establish a TCP connection to the specified port on the specified host. 258 */ 259 conn_t * 260 fetch_connect(const char *host, int port, int af, int verbose) 261 { 262 conn_t *conn; 263 char pbuf[10]; 264 const char *bindaddr; 265 struct addrinfo hints, *res, *res0; 266 int sd, err; 267 268 DEBUG(fprintf(stderr, "---> %s:%d\n", host, port)); 269 270 if (verbose) 271 fetch_info("looking up %s", host); 272 273 /* look up host name and set up socket address structure */ 274 snprintf(pbuf, sizeof(pbuf), "%d", port); 275 memset(&hints, 0, sizeof(hints)); 276 hints.ai_family = af; 277 hints.ai_socktype = SOCK_STREAM; 278 hints.ai_protocol = 0; 279 if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) { 280 netdb_seterr(err); 281 return (NULL); 282 } 283 bindaddr = getenv("FETCH_BIND_ADDRESS"); 284 285 if (verbose) 286 fetch_info("connecting to %s:%d", host, port); 287 288 /* try to connect */ 289 for (sd = -1, res = res0; res; sd = -1, res = res->ai_next) { 290 if ((sd = socket(res->ai_family, res->ai_socktype, 291 res->ai_protocol)) == -1) 292 continue; 293 if (bindaddr != NULL && *bindaddr != '\0' && 294 fetch_bind(sd, res->ai_family, bindaddr) != 0) { 295 fetch_info("failed to bind to '%s'", bindaddr); 296 close(sd); 297 continue; 298 } 299 if (connect(sd, res->ai_addr, res->ai_addrlen) == 0 && 300 fcntl(sd, F_SETFL, O_NONBLOCK) == 0) 301 break; 302 close(sd); 303 } 304 freeaddrinfo(res0); 305 if (sd == -1) { 306 fetch_syserr(); 307 return (NULL); 308 } 309 310 if ((conn = fetch_reopen(sd)) == NULL) { 311 fetch_syserr(); 312 close(sd); 313 } 314 return (conn); 315 } 316 317 318 /* 319 * Enable SSL on a connection. 320 */ 321 int 322 fetch_ssl(conn_t *conn, int verbose) 323 { 324 #ifdef WITH_SSL 325 int ret, ssl_err; 326 327 /* Init the SSL library and context */ 328 if (!SSL_library_init()){ 329 fprintf(stderr, "SSL library init failed\n"); 330 return (-1); 331 } 332 333 SSL_load_error_strings(); 334 335 conn->ssl_meth = SSLv23_client_method(); 336 conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth); 337 SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY); 338 339 conn->ssl = SSL_new(conn->ssl_ctx); 340 if (conn->ssl == NULL){ 341 fprintf(stderr, "SSL context creation failed\n"); 342 return (-1); 343 } 344 SSL_set_fd(conn->ssl, conn->sd); 345 while ((ret = SSL_connect(conn->ssl)) == -1) { 346 ssl_err = SSL_get_error(conn->ssl, ret); 347 if (ssl_err != SSL_ERROR_WANT_READ && 348 ssl_err != SSL_ERROR_WANT_WRITE) { 349 ERR_print_errors_fp(stderr); 350 return (-1); 351 } 352 } 353 354 if (verbose) { 355 X509_NAME *name; 356 char *str; 357 358 fprintf(stderr, "SSL connection established using %s\n", 359 SSL_get_cipher(conn->ssl)); 360 conn->ssl_cert = SSL_get_peer_certificate(conn->ssl); 361 name = X509_get_subject_name(conn->ssl_cert); 362 str = X509_NAME_oneline(name, 0, 0); 363 printf("Certificate subject: %s\n", str); 364 free(str); 365 name = X509_get_issuer_name(conn->ssl_cert); 366 str = X509_NAME_oneline(name, 0, 0); 367 printf("Certificate issuer: %s\n", str); 368 free(str); 369 } 370 371 return (0); 372 #else 373 (void)conn; 374 (void)verbose; 375 fprintf(stderr, "SSL support disabled\n"); 376 return (-1); 377 #endif 378 } 379 380 #define FETCH_READ_WAIT -2 381 #define FETCH_READ_ERROR -1 382 #define FETCH_READ_DONE 0 383 384 #ifdef WITH_SSL 385 static ssize_t 386 fetch_ssl_read(SSL *ssl, char *buf, size_t len) 387 { 388 ssize_t rlen; 389 int ssl_err; 390 391 rlen = SSL_read(ssl, buf, len); 392 if (rlen < 0) { 393 ssl_err = SSL_get_error(ssl, rlen); 394 if (ssl_err == SSL_ERROR_WANT_READ || 395 ssl_err == SSL_ERROR_WANT_WRITE) { 396 return (FETCH_READ_WAIT); 397 } else { 398 ERR_print_errors_fp(stderr); 399 return (FETCH_READ_ERROR); 400 } 401 } 402 return (rlen); 403 } 404 #endif 405 406 /* 407 * Cache some data that was read from a socket but cannot be immediately 408 * returned because of an interrupted system call. 409 */ 410 static int 411 fetch_cache_data(conn_t *conn, char *src, size_t nbytes) 412 { 413 char *tmp; 414 415 if (conn->cache.size < nbytes) { 416 tmp = realloc(conn->cache.buf, nbytes); 417 if (tmp == NULL) { 418 fetch_syserr(); 419 return (-1); 420 } 421 conn->cache.buf = tmp; 422 conn->cache.size = nbytes; 423 } 424 425 memcpy(conn->cache.buf, src, nbytes); 426 conn->cache.len = nbytes; 427 conn->cache.pos = 0; 428 429 return (0); 430 } 431 432 433 static ssize_t 434 fetch_socket_read(int sd, char *buf, size_t len) 435 { 436 ssize_t rlen; 437 438 rlen = read(sd, buf, len); 439 if (rlen < 0) { 440 if (errno == EAGAIN || (errno == EINTR && fetchRestartCalls)) 441 return (FETCH_READ_WAIT); 442 else 443 return (FETCH_READ_ERROR); 444 } 445 return (rlen); 446 } 447 448 /* 449 * Read a character from a connection w/ timeout 450 */ 451 ssize_t 452 fetch_read(conn_t *conn, char *buf, size_t len) 453 { 454 struct timeval now, timeout, delta; 455 fd_set readfds; 456 ssize_t rlen, total; 457 char *start; 458 459 if (fetchTimeout > 0) { 460 gettimeofday(&timeout, NULL); 461 timeout.tv_sec += fetchTimeout; 462 } 463 464 total = 0; 465 start = buf; 466 467 if (conn->cache.len > 0) { 468 /* 469 * The last invocation of fetch_read was interrupted by a 470 * signal after some data had been read from the socket. Copy 471 * the cached data into the supplied buffer before trying to 472 * read from the socket again. 473 */ 474 total = (conn->cache.len < len) ? conn->cache.len : len; 475 memcpy(buf, conn->cache.buf, total); 476 477 conn->cache.len -= total; 478 conn->cache.pos += total; 479 len -= total; 480 buf += total; 481 } 482 483 while (len > 0) { 484 /* 485 * The socket is non-blocking. Instead of the canonical 486 * select() -> read(), we do the following: 487 * 488 * 1) call read() or SSL_read(). 489 * 2) if an error occurred, return -1. 490 * 3) if we received data but we still expect more, 491 * update our counters and loop. 492 * 4) if read() or SSL_read() signaled EOF, return. 493 * 5) if we did not receive any data but we're not at EOF, 494 * call select(). 495 * 496 * In the SSL case, this is necessary because if we 497 * receive a close notification, we have to call 498 * SSL_read() one additional time after we've read 499 * everything we received. 500 * 501 * In the non-SSL case, it may improve performance (very 502 * slightly) when reading small amounts of data. 503 */ 504 #ifdef WITH_SSL 505 if (conn->ssl != NULL) 506 rlen = fetch_ssl_read(conn->ssl, buf, len); 507 else 508 #endif 509 rlen = fetch_socket_read(conn->sd, buf, len); 510 if (rlen == 0) { 511 break; 512 } else if (rlen > 0) { 513 len -= rlen; 514 buf += rlen; 515 total += rlen; 516 continue; 517 } else if (rlen == FETCH_READ_ERROR) { 518 if (errno == EINTR) 519 fetch_cache_data(conn, start, total); 520 return (-1); 521 } 522 // assert(rlen == FETCH_READ_WAIT); 523 FD_ZERO(&readfds); 524 while (!FD_ISSET(conn->sd, &readfds)) { 525 FD_SET(conn->sd, &readfds); 526 if (fetchTimeout > 0) { 527 gettimeofday(&now, NULL); 528 if (!timercmp(&timeout, &now, >)) { 529 errno = ETIMEDOUT; 530 fetch_syserr(); 531 return (-1); 532 } 533 timersub(&timeout, &now, &delta); 534 } 535 errno = 0; 536 if (select(conn->sd + 1, &readfds, NULL, NULL, 537 fetchTimeout > 0 ? &delta : NULL) < 0) { 538 if (errno == EINTR) { 539 if (fetchRestartCalls) 540 continue; 541 /* Save anything that was read. */ 542 fetch_cache_data(conn, start, total); 543 } 544 fetch_syserr(); 545 return (-1); 546 } 547 } 548 } 549 return (total); 550 } 551 552 553 /* 554 * Read a line of text from a connection w/ timeout 555 */ 556 #define MIN_BUF_SIZE 1024 557 558 int 559 fetch_getln(conn_t *conn) 560 { 561 char *tmp; 562 size_t tmpsize; 563 ssize_t len; 564 char c; 565 566 if (conn->buf == NULL) { 567 if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) { 568 errno = ENOMEM; 569 return (-1); 570 } 571 conn->bufsize = MIN_BUF_SIZE; 572 } 573 574 conn->buf[0] = '\0'; 575 conn->buflen = 0; 576 577 do { 578 len = fetch_read(conn, &c, 1); 579 if (len == -1) 580 return (-1); 581 if (len == 0) 582 break; 583 conn->buf[conn->buflen++] = c; 584 if (conn->buflen == conn->bufsize) { 585 tmp = conn->buf; 586 tmpsize = conn->bufsize * 2 + 1; 587 if ((tmp = realloc(tmp, tmpsize)) == NULL) { 588 errno = ENOMEM; 589 return (-1); 590 } 591 conn->buf = tmp; 592 conn->bufsize = tmpsize; 593 } 594 } while (c != '\n'); 595 596 conn->buf[conn->buflen] = '\0'; 597 DEBUG(fprintf(stderr, "<<< %s", conn->buf)); 598 return (0); 599 } 600 601 602 /* 603 * Write to a connection w/ timeout 604 */ 605 ssize_t 606 fetch_write(conn_t *conn, const char *buf, size_t len) 607 { 608 struct iovec iov; 609 610 iov.iov_base = __DECONST(char *, buf); 611 iov.iov_len = len; 612 return fetch_writev(conn, &iov, 1); 613 } 614 615 /* 616 * Write a vector to a connection w/ timeout 617 * Note: can modify the iovec. 618 */ 619 ssize_t 620 fetch_writev(conn_t *conn, struct iovec *iov, int iovcnt) 621 { 622 struct timeval now, timeout, delta; 623 fd_set writefds; 624 ssize_t wlen, total; 625 int r; 626 627 if (fetchTimeout) { 628 FD_ZERO(&writefds); 629 gettimeofday(&timeout, NULL); 630 timeout.tv_sec += fetchTimeout; 631 } 632 633 total = 0; 634 while (iovcnt > 0) { 635 while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) { 636 FD_SET(conn->sd, &writefds); 637 gettimeofday(&now, NULL); 638 delta.tv_sec = timeout.tv_sec - now.tv_sec; 639 delta.tv_usec = timeout.tv_usec - now.tv_usec; 640 if (delta.tv_usec < 0) { 641 delta.tv_usec += 1000000; 642 delta.tv_sec--; 643 } 644 if (delta.tv_sec < 0) { 645 errno = ETIMEDOUT; 646 fetch_syserr(); 647 return (-1); 648 } 649 errno = 0; 650 r = select(conn->sd + 1, NULL, &writefds, NULL, &delta); 651 if (r == -1) { 652 if (errno == EINTR && fetchRestartCalls) 653 continue; 654 return (-1); 655 } 656 } 657 errno = 0; 658 #ifdef WITH_SSL 659 if (conn->ssl != NULL) 660 wlen = SSL_write(conn->ssl, 661 iov->iov_base, iov->iov_len); 662 else 663 #endif 664 wlen = writev(conn->sd, iov, iovcnt); 665 if (wlen == 0) { 666 /* we consider a short write a failure */ 667 /* XXX perhaps we shouldn't in the SSL case */ 668 errno = EPIPE; 669 fetch_syserr(); 670 return (-1); 671 } 672 if (wlen < 0) { 673 if (errno == EINTR && fetchRestartCalls) 674 continue; 675 return (-1); 676 } 677 total += wlen; 678 while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) { 679 wlen -= iov->iov_len; 680 iov++; 681 iovcnt--; 682 } 683 if (iovcnt > 0) { 684 iov->iov_len -= wlen; 685 iov->iov_base = __DECONST(char *, iov->iov_base) + wlen; 686 } 687 } 688 return (total); 689 } 690 691 692 /* 693 * Write a line of text to a connection w/ timeout 694 */ 695 int 696 fetch_putln(conn_t *conn, const char *str, size_t len) 697 { 698 struct iovec iov[2]; 699 int ret; 700 701 DEBUG(fprintf(stderr, ">>> %s\n", str)); 702 iov[0].iov_base = __DECONST(char *, str); 703 iov[0].iov_len = len; 704 iov[1].iov_base = __DECONST(char *, ENDL); 705 iov[1].iov_len = sizeof(ENDL); 706 if (len == 0) 707 ret = fetch_writev(conn, &iov[1], 1); 708 else 709 ret = fetch_writev(conn, iov, 2); 710 if (ret == -1) 711 return (-1); 712 return (0); 713 } 714 715 716 /* 717 * Close connection 718 */ 719 int 720 fetch_close(conn_t *conn) 721 { 722 int ret; 723 724 if (--conn->ref > 0) 725 return (0); 726 ret = close(conn->sd); 727 free(conn->cache.buf); 728 free(conn->buf); 729 free(conn); 730 return (ret); 731 } 732 733 734 /*** Directory-related utility functions *************************************/ 735 736 int 737 fetch_add_entry(struct url_ent **p, int *size, int *len, 738 const char *name, struct url_stat *us) 739 { 740 struct url_ent *tmp; 741 742 if (*p == NULL) { 743 *size = 0; 744 *len = 0; 745 } 746 747 if (*len >= *size - 1) { 748 tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p)); 749 if (tmp == NULL) { 750 errno = ENOMEM; 751 fetch_syserr(); 752 return (-1); 753 } 754 *size = (*size * 2 + 1); 755 *p = tmp; 756 } 757 758 tmp = *p + *len; 759 snprintf(tmp->name, PATH_MAX, "%s", name); 760 memcpy(&tmp->stat, us, sizeof(*us)); 761 762 (*len)++; 763 (++tmp)->name[0] = 0; 764 765 return (0); 766 } 767 768 769 /*** Authentication-related utility functions ********************************/ 770 771 static const char * 772 fetch_read_word(FILE *f) 773 { 774 static char word[1024]; 775 776 if (fscanf(f, " %1023s ", word) != 1) 777 return (NULL); 778 return (word); 779 } 780 781 /* 782 * Get authentication data for a URL from .netrc 783 */ 784 int 785 fetch_netrc_auth(struct url *url) 786 { 787 char fn[PATH_MAX]; 788 const char *word; 789 char *p; 790 FILE *f; 791 792 if ((p = getenv("NETRC")) != NULL) { 793 if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) { 794 fetch_info("$NETRC specifies a file name " 795 "longer than PATH_MAX"); 796 return (-1); 797 } 798 } else { 799 if ((p = getenv("HOME")) != NULL) { 800 struct passwd *pwd; 801 802 if ((pwd = getpwuid(getuid())) == NULL || 803 (p = pwd->pw_dir) == NULL) 804 return (-1); 805 } 806 if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn)) 807 return (-1); 808 } 809 810 if ((f = fopen(fn, "r")) == NULL) 811 return (-1); 812 while ((word = fetch_read_word(f)) != NULL) { 813 if (strcmp(word, "default") == 0) { 814 DEBUG(fetch_info("Using default .netrc settings")); 815 break; 816 } 817 if (strcmp(word, "machine") == 0 && 818 (word = fetch_read_word(f)) != NULL && 819 strcasecmp(word, url->host) == 0) { 820 DEBUG(fetch_info("Using .netrc settings for %s", word)); 821 break; 822 } 823 } 824 if (word == NULL) 825 goto ferr; 826 while ((word = fetch_read_word(f)) != NULL) { 827 if (strcmp(word, "login") == 0) { 828 if ((word = fetch_read_word(f)) == NULL) 829 goto ferr; 830 if (snprintf(url->user, sizeof(url->user), 831 "%s", word) > (int)sizeof(url->user)) { 832 fetch_info("login name in .netrc is too long"); 833 url->user[0] = '\0'; 834 } 835 } else if (strcmp(word, "password") == 0) { 836 if ((word = fetch_read_word(f)) == NULL) 837 goto ferr; 838 if (snprintf(url->pwd, sizeof(url->pwd), 839 "%s", word) > (int)sizeof(url->pwd)) { 840 fetch_info("password in .netrc is too long"); 841 url->pwd[0] = '\0'; 842 } 843 } else if (strcmp(word, "account") == 0) { 844 if ((word = fetch_read_word(f)) == NULL) 845 goto ferr; 846 /* XXX not supported! */ 847 } else { 848 break; 849 } 850 } 851 fclose(f); 852 return (0); 853 ferr: 854 fclose(f); 855 return (-1); 856 } 857 858 /* 859 * The no_proxy environment variable specifies a set of domains for 860 * which the proxy should not be consulted; the contents is a comma-, 861 * or space-separated list of domain names. A single asterisk will 862 * override all proxy variables and no transactions will be proxied 863 * (for compatability with lynx and curl, see the discussion at 864 * <http://curl.haxx.se/mail/archive_pre_oct_99/0009.html>). 865 */ 866 int 867 fetch_no_proxy_match(const char *host) 868 { 869 const char *no_proxy, *p, *q; 870 size_t h_len, d_len; 871 872 if ((no_proxy = getenv("NO_PROXY")) == NULL && 873 (no_proxy = getenv("no_proxy")) == NULL) 874 return (0); 875 876 /* asterisk matches any hostname */ 877 if (strcmp(no_proxy, "*") == 0) 878 return (1); 879 880 h_len = strlen(host); 881 p = no_proxy; 882 do { 883 /* position p at the beginning of a domain suffix */ 884 while (*p == ',' || isspace((unsigned char)*p)) 885 p++; 886 887 /* position q at the first separator character */ 888 for (q = p; *q; ++q) 889 if (*q == ',' || isspace((unsigned char)*q)) 890 break; 891 892 d_len = q - p; 893 if (d_len > 0 && h_len >= d_len && 894 strncasecmp(host + h_len - d_len, 895 p, d_len) == 0) { 896 /* domain name matches */ 897 return (1); 898 } 899 900 p = q + 1; 901 } while (*q); 902 903 return (0); 904 } 905