1 /*- 2 * Copyright (c) 1998-2004 Dag-Erling Co�dan Sm�rgrav 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/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/socket.h> 34 #include <sys/time.h> 35 #include <sys/uio.h> 36 37 #include <netinet/in.h> 38 39 #include <ctype.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <netdb.h> 43 #include <pwd.h> 44 #include <stdarg.h> 45 #include <stdlib.h> 46 #include <stdio.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 #include "fetch.h" 51 #include "common.h" 52 53 54 /*** Local data **************************************************************/ 55 56 /* 57 * Error messages for resolver errors 58 */ 59 static struct fetcherr netdb_errlist[] = { 60 #ifdef EAI_NODATA 61 { EAI_NODATA, FETCH_RESOLV, "Host not found" }, 62 #endif 63 { EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" }, 64 { EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" }, 65 { EAI_NONAME, FETCH_RESOLV, "No address record" }, 66 { -1, FETCH_UNKNOWN, "Unknown resolver error" } 67 }; 68 69 /* End-of-Line */ 70 static const char ENDL[2] = "\r\n"; 71 72 73 /*** Error-reporting functions ***********************************************/ 74 75 /* 76 * Map error code to string 77 */ 78 static struct fetcherr * 79 fetch_finderr(struct fetcherr *p, int e) 80 { 81 while (p->num != -1 && p->num != e) 82 p++; 83 return (p); 84 } 85 86 /* 87 * Set error code 88 */ 89 void 90 fetch_seterr(struct fetcherr *p, int e) 91 { 92 p = fetch_finderr(p, e); 93 fetchLastErrCode = p->cat; 94 snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string); 95 } 96 97 /* 98 * Set error code according to errno 99 */ 100 void 101 fetch_syserr(void) 102 { 103 switch (errno) { 104 case 0: 105 fetchLastErrCode = FETCH_OK; 106 break; 107 case EPERM: 108 case EACCES: 109 case EROFS: 110 case EAUTH: 111 case ENEEDAUTH: 112 fetchLastErrCode = FETCH_AUTH; 113 break; 114 case ENOENT: 115 case EISDIR: /* XXX */ 116 fetchLastErrCode = FETCH_UNAVAIL; 117 break; 118 case ENOMEM: 119 fetchLastErrCode = FETCH_MEMORY; 120 break; 121 case EBUSY: 122 case EAGAIN: 123 fetchLastErrCode = FETCH_TEMP; 124 break; 125 case EEXIST: 126 fetchLastErrCode = FETCH_EXISTS; 127 break; 128 case ENOSPC: 129 fetchLastErrCode = FETCH_FULL; 130 break; 131 case EADDRINUSE: 132 case EADDRNOTAVAIL: 133 case ENETDOWN: 134 case ENETUNREACH: 135 case ENETRESET: 136 case EHOSTUNREACH: 137 fetchLastErrCode = FETCH_NETWORK; 138 break; 139 case ECONNABORTED: 140 case ECONNRESET: 141 fetchLastErrCode = FETCH_ABORT; 142 break; 143 case ETIMEDOUT: 144 fetchLastErrCode = FETCH_TIMEOUT; 145 break; 146 case ECONNREFUSED: 147 case EHOSTDOWN: 148 fetchLastErrCode = FETCH_DOWN; 149 break; 150 default: 151 fetchLastErrCode = FETCH_UNKNOWN; 152 } 153 snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno)); 154 } 155 156 157 /* 158 * Emit status message 159 */ 160 void 161 fetch_info(const char *fmt, ...) 162 { 163 va_list ap; 164 165 va_start(ap, fmt); 166 vfprintf(stderr, fmt, ap); 167 va_end(ap); 168 fputc('\n', stderr); 169 } 170 171 172 /*** Network-related utility functions ***************************************/ 173 174 /* 175 * Return the default port for a scheme 176 */ 177 int 178 fetch_default_port(const char *scheme) 179 { 180 struct servent *se; 181 182 if ((se = getservbyname(scheme, "tcp")) != NULL) 183 return (ntohs(se->s_port)); 184 if (strcasecmp(scheme, SCHEME_FTP) == 0) 185 return (FTP_DEFAULT_PORT); 186 if (strcasecmp(scheme, SCHEME_HTTP) == 0) 187 return (HTTP_DEFAULT_PORT); 188 return (0); 189 } 190 191 /* 192 * Return the default proxy port for a scheme 193 */ 194 int 195 fetch_default_proxy_port(const char *scheme) 196 { 197 if (strcasecmp(scheme, SCHEME_FTP) == 0) 198 return (FTP_DEFAULT_PROXY_PORT); 199 if (strcasecmp(scheme, SCHEME_HTTP) == 0) 200 return (HTTP_DEFAULT_PROXY_PORT); 201 return (0); 202 } 203 204 205 /* 206 * Create a connection for an existing descriptor. 207 */ 208 conn_t * 209 fetch_reopen(int sd) 210 { 211 conn_t *conn; 212 213 /* allocate and fill connection structure */ 214 if ((conn = calloc(1, sizeof(*conn))) == NULL) 215 return (NULL); 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 int ret, ssl_err; 325 326 #ifdef WITH_SSL 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 static ssize_t 407 fetch_socket_read(int sd, char *buf, size_t len) 408 { 409 ssize_t rlen; 410 411 rlen = read(sd, buf, len); 412 if (rlen < 0) { 413 if (errno == EAGAIN || (errno == EINTR && fetchRestartCalls)) 414 return (FETCH_READ_WAIT); 415 else 416 return (FETCH_READ_ERROR); 417 } 418 return (rlen); 419 } 420 421 /* 422 * Read a character from a connection w/ timeout 423 */ 424 ssize_t 425 fetch_read(conn_t *conn, char *buf, size_t len) 426 { 427 struct timeval now, timeout, delta; 428 fd_set readfds; 429 ssize_t rlen, total; 430 int r; 431 432 if (fetchTimeout) { 433 FD_ZERO(&readfds); 434 gettimeofday(&timeout, NULL); 435 timeout.tv_sec += fetchTimeout; 436 } 437 438 total = 0; 439 while (len > 0) { 440 /* 441 * The socket is non-blocking. Instead of the canonical 442 * select() -> read(), we do the following: 443 * 444 * 1) call read() or SSL_read(). 445 * 2) if an error occurred, return -1. 446 * 3) if we received data but we still expect more, 447 * update our counters and loop. 448 * 4) if read() or SSL_read() signaled EOF, return. 449 * 5) if we did not receive any data but we're not at EOF, 450 * call select(). 451 * 452 * In the SSL case, this is necessary because if we 453 * receive a close notification, we have to call 454 * SSL_read() one additional time after we've read 455 * everything we received. 456 * 457 * In the non-SSL case, it may improve performance (very 458 * slightly) when reading small amounts of data. 459 */ 460 #ifdef WITH_SSL 461 if (conn->ssl != NULL) 462 rlen = fetch_ssl_read(conn->ssl, buf, len); 463 else 464 #endif 465 rlen = fetch_socket_read(conn->sd, buf, len); 466 if (rlen == 0) { 467 break; 468 } else if (rlen > 0) { 469 len -= rlen; 470 buf += rlen; 471 total += rlen; 472 continue; 473 } else if (rlen == FETCH_READ_ERROR) { 474 return (-1); 475 } 476 // assert(rlen == FETCH_READ_WAIT); 477 while (fetchTimeout && !FD_ISSET(conn->sd, &readfds)) { 478 FD_SET(conn->sd, &readfds); 479 gettimeofday(&now, NULL); 480 delta.tv_sec = timeout.tv_sec - now.tv_sec; 481 delta.tv_usec = timeout.tv_usec - now.tv_usec; 482 if (delta.tv_usec < 0) { 483 delta.tv_usec += 1000000; 484 delta.tv_sec--; 485 } 486 if (delta.tv_sec < 0) { 487 errno = ETIMEDOUT; 488 fetch_syserr(); 489 return (-1); 490 } 491 errno = 0; 492 r = select(conn->sd + 1, &readfds, NULL, NULL, &delta); 493 if (r == -1) { 494 if (errno == EINTR && fetchRestartCalls) 495 continue; 496 fetch_syserr(); 497 return (-1); 498 } 499 } 500 } 501 return (total); 502 } 503 504 505 /* 506 * Read a line of text from a connection w/ timeout 507 */ 508 #define MIN_BUF_SIZE 1024 509 510 int 511 fetch_getln(conn_t *conn) 512 { 513 char *tmp; 514 size_t tmpsize; 515 ssize_t len; 516 char c; 517 518 if (conn->buf == NULL) { 519 if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) { 520 errno = ENOMEM; 521 return (-1); 522 } 523 conn->bufsize = MIN_BUF_SIZE; 524 } 525 526 conn->buf[0] = '\0'; 527 conn->buflen = 0; 528 529 do { 530 len = fetch_read(conn, &c, 1); 531 if (len == -1) 532 return (-1); 533 if (len == 0) 534 break; 535 conn->buf[conn->buflen++] = c; 536 if (conn->buflen == conn->bufsize) { 537 tmp = conn->buf; 538 tmpsize = conn->bufsize * 2 + 1; 539 if ((tmp = realloc(tmp, tmpsize)) == NULL) { 540 errno = ENOMEM; 541 return (-1); 542 } 543 conn->buf = tmp; 544 conn->bufsize = tmpsize; 545 } 546 } while (c != '\n'); 547 548 conn->buf[conn->buflen] = '\0'; 549 DEBUG(fprintf(stderr, "<<< %s", conn->buf)); 550 return (0); 551 } 552 553 554 /* 555 * Write to a connection w/ timeout 556 */ 557 ssize_t 558 fetch_write(conn_t *conn, const char *buf, size_t len) 559 { 560 struct iovec iov; 561 562 iov.iov_base = __DECONST(char *, buf); 563 iov.iov_len = len; 564 return fetch_writev(conn, &iov, 1); 565 } 566 567 /* 568 * Write a vector to a connection w/ timeout 569 * Note: can modify the iovec. 570 */ 571 ssize_t 572 fetch_writev(conn_t *conn, struct iovec *iov, int iovcnt) 573 { 574 struct timeval now, timeout, delta; 575 fd_set writefds; 576 ssize_t wlen, total; 577 int r; 578 579 if (fetchTimeout) { 580 FD_ZERO(&writefds); 581 gettimeofday(&timeout, NULL); 582 timeout.tv_sec += fetchTimeout; 583 } 584 585 total = 0; 586 while (iovcnt > 0) { 587 while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) { 588 FD_SET(conn->sd, &writefds); 589 gettimeofday(&now, NULL); 590 delta.tv_sec = timeout.tv_sec - now.tv_sec; 591 delta.tv_usec = timeout.tv_usec - now.tv_usec; 592 if (delta.tv_usec < 0) { 593 delta.tv_usec += 1000000; 594 delta.tv_sec--; 595 } 596 if (delta.tv_sec < 0) { 597 errno = ETIMEDOUT; 598 fetch_syserr(); 599 return (-1); 600 } 601 errno = 0; 602 r = select(conn->sd + 1, NULL, &writefds, NULL, &delta); 603 if (r == -1) { 604 if (errno == EINTR && fetchRestartCalls) 605 continue; 606 return (-1); 607 } 608 } 609 errno = 0; 610 #ifdef WITH_SSL 611 if (conn->ssl != NULL) 612 wlen = SSL_write(conn->ssl, 613 iov->iov_base, iov->iov_len); 614 else 615 #endif 616 wlen = writev(conn->sd, iov, iovcnt); 617 if (wlen == 0) { 618 /* we consider a short write a failure */ 619 /* XXX perhaps we shouldn't in the SSL case */ 620 errno = EPIPE; 621 fetch_syserr(); 622 return (-1); 623 } 624 if (wlen < 0) { 625 if (errno == EINTR && fetchRestartCalls) 626 continue; 627 return (-1); 628 } 629 total += wlen; 630 while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) { 631 wlen -= iov->iov_len; 632 iov++; 633 iovcnt--; 634 } 635 if (iovcnt > 0) { 636 iov->iov_len -= wlen; 637 iov->iov_base = __DECONST(char *, iov->iov_base) + wlen; 638 } 639 } 640 return (total); 641 } 642 643 644 /* 645 * Write a line of text to a connection w/ timeout 646 */ 647 int 648 fetch_putln(conn_t *conn, const char *str, size_t len) 649 { 650 struct iovec iov[2]; 651 int ret; 652 653 DEBUG(fprintf(stderr, ">>> %s\n", str)); 654 iov[0].iov_base = __DECONST(char *, str); 655 iov[0].iov_len = len; 656 iov[1].iov_base = __DECONST(char *, ENDL); 657 iov[1].iov_len = sizeof(ENDL); 658 if (len == 0) 659 ret = fetch_writev(conn, &iov[1], 1); 660 else 661 ret = fetch_writev(conn, iov, 2); 662 if (ret == -1) 663 return (-1); 664 return (0); 665 } 666 667 668 /* 669 * Close connection 670 */ 671 int 672 fetch_close(conn_t *conn) 673 { 674 int ret; 675 676 if (--conn->ref > 0) 677 return (0); 678 ret = close(conn->sd); 679 free(conn->buf); 680 free(conn); 681 return (ret); 682 } 683 684 685 /*** Directory-related utility functions *************************************/ 686 687 int 688 fetch_add_entry(struct url_ent **p, int *size, int *len, 689 const char *name, struct url_stat *us) 690 { 691 struct url_ent *tmp; 692 693 if (*p == NULL) { 694 *size = 0; 695 *len = 0; 696 } 697 698 if (*len >= *size - 1) { 699 tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p)); 700 if (tmp == NULL) { 701 errno = ENOMEM; 702 fetch_syserr(); 703 return (-1); 704 } 705 *size = (*size * 2 + 1); 706 *p = tmp; 707 } 708 709 tmp = *p + *len; 710 snprintf(tmp->name, PATH_MAX, "%s", name); 711 memcpy(&tmp->stat, us, sizeof(*us)); 712 713 (*len)++; 714 (++tmp)->name[0] = 0; 715 716 return (0); 717 } 718 719 720 /*** Authentication-related utility functions ********************************/ 721 722 static const char * 723 fetch_read_word(FILE *f) 724 { 725 static char word[1024]; 726 727 if (fscanf(f, " %1023s ", word) != 1) 728 return (NULL); 729 return (word); 730 } 731 732 /* 733 * Get authentication data for a URL from .netrc 734 */ 735 int 736 fetch_netrc_auth(struct url *url) 737 { 738 char fn[PATH_MAX]; 739 const char *word; 740 char *p; 741 FILE *f; 742 743 if ((p = getenv("NETRC")) != NULL) { 744 if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) { 745 fetch_info("$NETRC specifies a file name " 746 "longer than PATH_MAX"); 747 return (-1); 748 } 749 } else { 750 if ((p = getenv("HOME")) != NULL) { 751 struct passwd *pwd; 752 753 if ((pwd = getpwuid(getuid())) == NULL || 754 (p = pwd->pw_dir) == NULL) 755 return (-1); 756 } 757 if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn)) 758 return (-1); 759 } 760 761 if ((f = fopen(fn, "r")) == NULL) 762 return (-1); 763 while ((word = fetch_read_word(f)) != NULL) { 764 if (strcmp(word, "default") == 0) { 765 DEBUG(fetch_info("Using default .netrc settings")); 766 break; 767 } 768 if (strcmp(word, "machine") == 0 && 769 (word = fetch_read_word(f)) != NULL && 770 strcasecmp(word, url->host) == 0) { 771 DEBUG(fetch_info("Using .netrc settings for %s", word)); 772 break; 773 } 774 } 775 if (word == NULL) 776 goto ferr; 777 while ((word = fetch_read_word(f)) != NULL) { 778 if (strcmp(word, "login") == 0) { 779 if ((word = fetch_read_word(f)) == NULL) 780 goto ferr; 781 if (snprintf(url->user, sizeof(url->user), 782 "%s", word) > (int)sizeof(url->user)) { 783 fetch_info("login name in .netrc is too long"); 784 url->user[0] = '\0'; 785 } 786 } else if (strcmp(word, "password") == 0) { 787 if ((word = fetch_read_word(f)) == NULL) 788 goto ferr; 789 if (snprintf(url->pwd, sizeof(url->pwd), 790 "%s", word) > (int)sizeof(url->pwd)) { 791 fetch_info("password in .netrc is too long"); 792 url->pwd[0] = '\0'; 793 } 794 } else if (strcmp(word, "account") == 0) { 795 if ((word = fetch_read_word(f)) == NULL) 796 goto ferr; 797 /* XXX not supported! */ 798 } else { 799 break; 800 } 801 } 802 fclose(f); 803 return (0); 804 ferr: 805 fclose(f); 806 return (-1); 807 } 808 809 /* 810 * The no_proxy environment variable specifies a set of domains for 811 * which the proxy should not be consulted; the contents is a comma-, 812 * or space-separated list of domain names. A single asterisk will 813 * override all proxy variables and no transactions will be proxied 814 * (for compatability with lynx and curl, see the discussion at 815 * <http://curl.haxx.se/mail/archive_pre_oct_99/0009.html>). 816 */ 817 int 818 fetch_no_proxy_match(const char *host) 819 { 820 const char *no_proxy, *p, *q; 821 size_t h_len, d_len; 822 823 if ((no_proxy = getenv("NO_PROXY")) == NULL && 824 (no_proxy = getenv("no_proxy")) == NULL) 825 return (0); 826 827 /* asterisk matches any hostname */ 828 if (strcmp(no_proxy, "*") == 0) 829 return (1); 830 831 h_len = strlen(host); 832 p = no_proxy; 833 do { 834 /* position p at the beginning of a domain suffix */ 835 while (*p == ',' || isspace((unsigned char)*p)) 836 p++; 837 838 /* position q at the first separator character */ 839 for (q = p; *q; ++q) 840 if (*q == ',' || isspace((unsigned char)*q)) 841 break; 842 843 d_len = q - p; 844 if (d_len > 0 && h_len >= d_len && 845 strncasecmp(host + h_len - d_len, 846 p, d_len) == 0) { 847 /* domain name matches */ 848 return (1); 849 } 850 851 p = q + 1; 852 } while (*q); 853 854 return (0); 855 } 856