1 /*- 2 * Copyright (c) 1998-2011 Dag-Erling 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 fcntl(sd, F_SETFD, FD_CLOEXEC); 217 conn->sd = sd; 218 ++conn->ref; 219 return (conn); 220 } 221 222 223 /* 224 * Bump a connection's reference count. 225 */ 226 conn_t * 227 fetch_ref(conn_t *conn) 228 { 229 230 ++conn->ref; 231 return (conn); 232 } 233 234 235 /* 236 * Bind a socket to a specific local address 237 */ 238 int 239 fetch_bind(int sd, int af, const char *addr) 240 { 241 struct addrinfo hints, *res, *res0; 242 int err; 243 244 memset(&hints, 0, sizeof(hints)); 245 hints.ai_family = af; 246 hints.ai_socktype = SOCK_STREAM; 247 hints.ai_protocol = 0; 248 if ((err = getaddrinfo(addr, NULL, &hints, &res0)) != 0) 249 return (-1); 250 for (res = res0; res; res = res->ai_next) 251 if (bind(sd, res->ai_addr, res->ai_addrlen) == 0) 252 return (0); 253 return (-1); 254 } 255 256 257 /* 258 * Establish a TCP connection to the specified port on the specified host. 259 */ 260 conn_t * 261 fetch_connect(const char *host, int port, int af, int verbose) 262 { 263 conn_t *conn; 264 char pbuf[10]; 265 const char *bindaddr; 266 struct addrinfo hints, *res, *res0; 267 int sd, err; 268 269 DEBUG(fprintf(stderr, "---> %s:%d\n", host, port)); 270 271 if (verbose) 272 fetch_info("looking up %s", host); 273 274 /* look up host name and set up socket address structure */ 275 snprintf(pbuf, sizeof(pbuf), "%d", port); 276 memset(&hints, 0, sizeof(hints)); 277 hints.ai_family = af; 278 hints.ai_socktype = SOCK_STREAM; 279 hints.ai_protocol = 0; 280 if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) { 281 netdb_seterr(err); 282 return (NULL); 283 } 284 bindaddr = getenv("FETCH_BIND_ADDRESS"); 285 286 if (verbose) 287 fetch_info("connecting to %s:%d", host, port); 288 289 /* try to connect */ 290 for (sd = -1, res = res0; res; sd = -1, res = res->ai_next) { 291 if ((sd = socket(res->ai_family, res->ai_socktype, 292 res->ai_protocol)) == -1) 293 continue; 294 if (bindaddr != NULL && *bindaddr != '\0' && 295 fetch_bind(sd, res->ai_family, bindaddr) != 0) { 296 fetch_info("failed to bind to '%s'", bindaddr); 297 close(sd); 298 continue; 299 } 300 if (connect(sd, res->ai_addr, res->ai_addrlen) == 0 && 301 fcntl(sd, F_SETFL, O_NONBLOCK) == 0) 302 break; 303 close(sd); 304 } 305 freeaddrinfo(res0); 306 if (sd == -1) { 307 fetch_syserr(); 308 return (NULL); 309 } 310 311 if ((conn = fetch_reopen(sd)) == NULL) { 312 fetch_syserr(); 313 close(sd); 314 } 315 return (conn); 316 } 317 318 319 /* 320 * Enable SSL on a connection. 321 */ 322 int 323 fetch_ssl(conn_t *conn, int verbose) 324 { 325 #ifdef WITH_SSL 326 int ret, ssl_err; 327 328 /* Init the SSL library and context */ 329 if (!SSL_library_init()){ 330 fprintf(stderr, "SSL library init failed\n"); 331 return (-1); 332 } 333 334 SSL_load_error_strings(); 335 336 conn->ssl_meth = SSLv23_client_method(); 337 conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth); 338 SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY); 339 340 conn->ssl = SSL_new(conn->ssl_ctx); 341 if (conn->ssl == NULL){ 342 fprintf(stderr, "SSL context creation failed\n"); 343 return (-1); 344 } 345 SSL_set_fd(conn->ssl, conn->sd); 346 while ((ret = SSL_connect(conn->ssl)) == -1) { 347 ssl_err = SSL_get_error(conn->ssl, ret); 348 if (ssl_err != SSL_ERROR_WANT_READ && 349 ssl_err != SSL_ERROR_WANT_WRITE) { 350 ERR_print_errors_fp(stderr); 351 return (-1); 352 } 353 } 354 355 if (verbose) { 356 X509_NAME *name; 357 char *str; 358 359 fprintf(stderr, "SSL connection established using %s\n", 360 SSL_get_cipher(conn->ssl)); 361 conn->ssl_cert = SSL_get_peer_certificate(conn->ssl); 362 name = X509_get_subject_name(conn->ssl_cert); 363 str = X509_NAME_oneline(name, 0, 0); 364 printf("Certificate subject: %s\n", str); 365 free(str); 366 name = X509_get_issuer_name(conn->ssl_cert); 367 str = X509_NAME_oneline(name, 0, 0); 368 printf("Certificate issuer: %s\n", str); 369 free(str); 370 } 371 372 return (0); 373 #else 374 (void)conn; 375 (void)verbose; 376 fprintf(stderr, "SSL support disabled\n"); 377 return (-1); 378 #endif 379 } 380 381 #define FETCH_READ_WAIT -2 382 #define FETCH_READ_ERROR -1 383 #define FETCH_READ_DONE 0 384 385 #ifdef WITH_SSL 386 static ssize_t 387 fetch_ssl_read(SSL *ssl, char *buf, size_t len) 388 { 389 ssize_t rlen; 390 int ssl_err; 391 392 rlen = SSL_read(ssl, buf, len); 393 if (rlen < 0) { 394 ssl_err = SSL_get_error(ssl, rlen); 395 if (ssl_err == SSL_ERROR_WANT_READ || 396 ssl_err == SSL_ERROR_WANT_WRITE) { 397 return (FETCH_READ_WAIT); 398 } else { 399 ERR_print_errors_fp(stderr); 400 return (FETCH_READ_ERROR); 401 } 402 } 403 return (rlen); 404 } 405 #endif 406 407 static ssize_t 408 fetch_socket_read(int sd, char *buf, size_t len) 409 { 410 ssize_t rlen; 411 412 rlen = read(sd, buf, len); 413 if (rlen < 0) { 414 if (errno == EAGAIN || (errno == EINTR && fetchRestartCalls)) 415 return (FETCH_READ_WAIT); 416 else 417 return (FETCH_READ_ERROR); 418 } 419 return (rlen); 420 } 421 422 /* 423 * Read a character from a connection w/ timeout 424 */ 425 ssize_t 426 fetch_read(conn_t *conn, char *buf, size_t len) 427 { 428 struct timeval now, timeout, delta; 429 fd_set readfds; 430 ssize_t rlen, total; 431 int r; 432 433 if (fetchTimeout) { 434 FD_ZERO(&readfds); 435 gettimeofday(&timeout, NULL); 436 timeout.tv_sec += fetchTimeout; 437 } 438 439 total = 0; 440 while (len > 0) { 441 /* 442 * The socket is non-blocking. Instead of the canonical 443 * select() -> read(), we do the following: 444 * 445 * 1) call read() or SSL_read(). 446 * 2) if an error occurred, return -1. 447 * 3) if we received data but we still expect more, 448 * update our counters and loop. 449 * 4) if read() or SSL_read() signaled EOF, return. 450 * 5) if we did not receive any data but we're not at EOF, 451 * call select(). 452 * 453 * In the SSL case, this is necessary because if we 454 * receive a close notification, we have to call 455 * SSL_read() one additional time after we've read 456 * everything we received. 457 * 458 * In the non-SSL case, it may improve performance (very 459 * slightly) when reading small amounts of data. 460 */ 461 #ifdef WITH_SSL 462 if (conn->ssl != NULL) 463 rlen = fetch_ssl_read(conn->ssl, buf, len); 464 else 465 #endif 466 rlen = fetch_socket_read(conn->sd, buf, len); 467 if (rlen == 0) { 468 break; 469 } else if (rlen > 0) { 470 len -= rlen; 471 buf += rlen; 472 total += rlen; 473 continue; 474 } else if (rlen == FETCH_READ_ERROR) { 475 return (-1); 476 } 477 // assert(rlen == FETCH_READ_WAIT); 478 while (fetchTimeout && !FD_ISSET(conn->sd, &readfds)) { 479 FD_SET(conn->sd, &readfds); 480 gettimeofday(&now, NULL); 481 delta.tv_sec = timeout.tv_sec - now.tv_sec; 482 delta.tv_usec = timeout.tv_usec - now.tv_usec; 483 if (delta.tv_usec < 0) { 484 delta.tv_usec += 1000000; 485 delta.tv_sec--; 486 } 487 if (delta.tv_sec < 0) { 488 errno = ETIMEDOUT; 489 fetch_syserr(); 490 return (-1); 491 } 492 errno = 0; 493 r = select(conn->sd + 1, &readfds, NULL, NULL, &delta); 494 if (r == -1) { 495 if (errno == EINTR && fetchRestartCalls) 496 continue; 497 fetch_syserr(); 498 return (-1); 499 } 500 } 501 } 502 return (total); 503 } 504 505 506 /* 507 * Read a line of text from a connection w/ timeout 508 */ 509 #define MIN_BUF_SIZE 1024 510 511 int 512 fetch_getln(conn_t *conn) 513 { 514 char *tmp; 515 size_t tmpsize; 516 ssize_t len; 517 char c; 518 519 if (conn->buf == NULL) { 520 if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) { 521 errno = ENOMEM; 522 return (-1); 523 } 524 conn->bufsize = MIN_BUF_SIZE; 525 } 526 527 conn->buf[0] = '\0'; 528 conn->buflen = 0; 529 530 do { 531 len = fetch_read(conn, &c, 1); 532 if (len == -1) 533 return (-1); 534 if (len == 0) 535 break; 536 conn->buf[conn->buflen++] = c; 537 if (conn->buflen == conn->bufsize) { 538 tmp = conn->buf; 539 tmpsize = conn->bufsize * 2 + 1; 540 if ((tmp = realloc(tmp, tmpsize)) == NULL) { 541 errno = ENOMEM; 542 return (-1); 543 } 544 conn->buf = tmp; 545 conn->bufsize = tmpsize; 546 } 547 } while (c != '\n'); 548 549 conn->buf[conn->buflen] = '\0'; 550 DEBUG(fprintf(stderr, "<<< %s", conn->buf)); 551 return (0); 552 } 553 554 555 /* 556 * Write to a connection w/ timeout 557 */ 558 ssize_t 559 fetch_write(conn_t *conn, const char *buf, size_t len) 560 { 561 struct iovec iov; 562 563 iov.iov_base = __DECONST(char *, buf); 564 iov.iov_len = len; 565 return fetch_writev(conn, &iov, 1); 566 } 567 568 /* 569 * Write a vector to a connection w/ timeout 570 * Note: can modify the iovec. 571 */ 572 ssize_t 573 fetch_writev(conn_t *conn, struct iovec *iov, int iovcnt) 574 { 575 struct timeval now, timeout, delta; 576 fd_set writefds; 577 ssize_t wlen, total; 578 int r; 579 580 if (fetchTimeout) { 581 FD_ZERO(&writefds); 582 gettimeofday(&timeout, NULL); 583 timeout.tv_sec += fetchTimeout; 584 } 585 586 total = 0; 587 while (iovcnt > 0) { 588 while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) { 589 FD_SET(conn->sd, &writefds); 590 gettimeofday(&now, NULL); 591 delta.tv_sec = timeout.tv_sec - now.tv_sec; 592 delta.tv_usec = timeout.tv_usec - now.tv_usec; 593 if (delta.tv_usec < 0) { 594 delta.tv_usec += 1000000; 595 delta.tv_sec--; 596 } 597 if (delta.tv_sec < 0) { 598 errno = ETIMEDOUT; 599 fetch_syserr(); 600 return (-1); 601 } 602 errno = 0; 603 r = select(conn->sd + 1, NULL, &writefds, NULL, &delta); 604 if (r == -1) { 605 if (errno == EINTR && fetchRestartCalls) 606 continue; 607 return (-1); 608 } 609 } 610 errno = 0; 611 #ifdef WITH_SSL 612 if (conn->ssl != NULL) 613 wlen = SSL_write(conn->ssl, 614 iov->iov_base, iov->iov_len); 615 else 616 #endif 617 wlen = writev(conn->sd, iov, iovcnt); 618 if (wlen == 0) { 619 /* we consider a short write a failure */ 620 /* XXX perhaps we shouldn't in the SSL case */ 621 errno = EPIPE; 622 fetch_syserr(); 623 return (-1); 624 } 625 if (wlen < 0) { 626 if (errno == EINTR && fetchRestartCalls) 627 continue; 628 return (-1); 629 } 630 total += wlen; 631 while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) { 632 wlen -= iov->iov_len; 633 iov++; 634 iovcnt--; 635 } 636 if (iovcnt > 0) { 637 iov->iov_len -= wlen; 638 iov->iov_base = __DECONST(char *, iov->iov_base) + wlen; 639 } 640 } 641 return (total); 642 } 643 644 645 /* 646 * Write a line of text to a connection w/ timeout 647 */ 648 int 649 fetch_putln(conn_t *conn, const char *str, size_t len) 650 { 651 struct iovec iov[2]; 652 int ret; 653 654 DEBUG(fprintf(stderr, ">>> %s\n", str)); 655 iov[0].iov_base = __DECONST(char *, str); 656 iov[0].iov_len = len; 657 iov[1].iov_base = __DECONST(char *, ENDL); 658 iov[1].iov_len = sizeof(ENDL); 659 if (len == 0) 660 ret = fetch_writev(conn, &iov[1], 1); 661 else 662 ret = fetch_writev(conn, iov, 2); 663 if (ret == -1) 664 return (-1); 665 return (0); 666 } 667 668 669 /* 670 * Close connection 671 */ 672 int 673 fetch_close(conn_t *conn) 674 { 675 int ret; 676 677 if (--conn->ref > 0) 678 return (0); 679 ret = close(conn->sd); 680 free(conn->buf); 681 free(conn); 682 return (ret); 683 } 684 685 686 /*** Directory-related utility functions *************************************/ 687 688 int 689 fetch_add_entry(struct url_ent **p, int *size, int *len, 690 const char *name, struct url_stat *us) 691 { 692 struct url_ent *tmp; 693 694 if (*p == NULL) { 695 *size = 0; 696 *len = 0; 697 } 698 699 if (*len >= *size - 1) { 700 tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p)); 701 if (tmp == NULL) { 702 errno = ENOMEM; 703 fetch_syserr(); 704 return (-1); 705 } 706 *size = (*size * 2 + 1); 707 *p = tmp; 708 } 709 710 tmp = *p + *len; 711 snprintf(tmp->name, PATH_MAX, "%s", name); 712 memcpy(&tmp->stat, us, sizeof(*us)); 713 714 (*len)++; 715 (++tmp)->name[0] = 0; 716 717 return (0); 718 } 719 720 721 /*** Authentication-related utility functions ********************************/ 722 723 static const char * 724 fetch_read_word(FILE *f) 725 { 726 static char word[1024]; 727 728 if (fscanf(f, " %1023s ", word) != 1) 729 return (NULL); 730 return (word); 731 } 732 733 /* 734 * Get authentication data for a URL from .netrc 735 */ 736 int 737 fetch_netrc_auth(struct url *url) 738 { 739 char fn[PATH_MAX]; 740 const char *word; 741 char *p; 742 FILE *f; 743 744 if ((p = getenv("NETRC")) != NULL) { 745 if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) { 746 fetch_info("$NETRC specifies a file name " 747 "longer than PATH_MAX"); 748 return (-1); 749 } 750 } else { 751 if ((p = getenv("HOME")) != NULL) { 752 struct passwd *pwd; 753 754 if ((pwd = getpwuid(getuid())) == NULL || 755 (p = pwd->pw_dir) == NULL) 756 return (-1); 757 } 758 if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn)) 759 return (-1); 760 } 761 762 if ((f = fopen(fn, "r")) == NULL) 763 return (-1); 764 while ((word = fetch_read_word(f)) != NULL) { 765 if (strcmp(word, "default") == 0) { 766 DEBUG(fetch_info("Using default .netrc settings")); 767 break; 768 } 769 if (strcmp(word, "machine") == 0 && 770 (word = fetch_read_word(f)) != NULL && 771 strcasecmp(word, url->host) == 0) { 772 DEBUG(fetch_info("Using .netrc settings for %s", word)); 773 break; 774 } 775 } 776 if (word == NULL) 777 goto ferr; 778 while ((word = fetch_read_word(f)) != NULL) { 779 if (strcmp(word, "login") == 0) { 780 if ((word = fetch_read_word(f)) == NULL) 781 goto ferr; 782 if (snprintf(url->user, sizeof(url->user), 783 "%s", word) > (int)sizeof(url->user)) { 784 fetch_info("login name in .netrc is too long"); 785 url->user[0] = '\0'; 786 } 787 } else if (strcmp(word, "password") == 0) { 788 if ((word = fetch_read_word(f)) == NULL) 789 goto ferr; 790 if (snprintf(url->pwd, sizeof(url->pwd), 791 "%s", word) > (int)sizeof(url->pwd)) { 792 fetch_info("password in .netrc is too long"); 793 url->pwd[0] = '\0'; 794 } 795 } else if (strcmp(word, "account") == 0) { 796 if ((word = fetch_read_word(f)) == NULL) 797 goto ferr; 798 /* XXX not supported! */ 799 } else { 800 break; 801 } 802 } 803 fclose(f); 804 return (0); 805 ferr: 806 fclose(f); 807 return (-1); 808 } 809 810 /* 811 * The no_proxy environment variable specifies a set of domains for 812 * which the proxy should not be consulted; the contents is a comma-, 813 * or space-separated list of domain names. A single asterisk will 814 * override all proxy variables and no transactions will be proxied 815 * (for compatability with lynx and curl, see the discussion at 816 * <http://curl.haxx.se/mail/archive_pre_oct_99/0009.html>). 817 */ 818 int 819 fetch_no_proxy_match(const char *host) 820 { 821 const char *no_proxy, *p, *q; 822 size_t h_len, d_len; 823 824 if ((no_proxy = getenv("NO_PROXY")) == NULL && 825 (no_proxy = getenv("no_proxy")) == NULL) 826 return (0); 827 828 /* asterisk matches any hostname */ 829 if (strcmp(no_proxy, "*") == 0) 830 return (1); 831 832 h_len = strlen(host); 833 p = no_proxy; 834 do { 835 /* position p at the beginning of a domain suffix */ 836 while (*p == ',' || isspace((unsigned char)*p)) 837 p++; 838 839 /* position q at the first separator character */ 840 for (q = p; *q; ++q) 841 if (*q == ',' || isspace((unsigned char)*q)) 842 break; 843 844 d_len = q - p; 845 if (d_len > 0 && h_len >= d_len && 846 strncasecmp(host + h_len - d_len, 847 p, d_len) == 0) { 848 /* domain name matches */ 849 return (1); 850 } 851 852 p = q + 1; 853 } while (*q); 854 855 return (0); 856 } 857