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 * $FreeBSD: src/lib/libfetch/common.c,v 1.56 2008/04/15 23:29:51 cperciva Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/socket.h> 33 #include <sys/time.h> 34 #include <sys/uio.h> 35 36 #include <netinet/in.h> 37 38 #include <ctype.h> 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <netdb.h> 42 #include <pwd.h> 43 #include <stdarg.h> 44 #include <stdlib.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #include "fetch.h" 50 #include "common.h" 51 52 53 /*** Local data **************************************************************/ 54 55 /* 56 * Error messages for resolver errors 57 */ 58 static struct fetcherr netdb_errlist[] = { 59 #ifdef EAI_NODATA 60 { EAI_NODATA, FETCH_RESOLV, "Host not found" }, 61 #endif 62 { EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" }, 63 { EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" }, 64 { EAI_NONAME, FETCH_RESOLV, "No address record" }, 65 { -1, FETCH_UNKNOWN, "Unknown resolver error" } 66 }; 67 68 /* End-of-Line */ 69 static const char ENDL[2] = "\r\n"; 70 71 72 /*** Error-reporting functions ***********************************************/ 73 74 /* 75 * Map error code to string 76 */ 77 static struct fetcherr * 78 fetch_finderr(struct fetcherr *p, int e) 79 { 80 while (p->num != -1 && p->num != e) 81 p++; 82 return (p); 83 } 84 85 /* 86 * Set error code 87 */ 88 void 89 fetch_seterr(struct fetcherr *p, int e) 90 { 91 p = fetch_finderr(p, e); 92 fetchLastErrCode = p->cat; 93 snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string); 94 } 95 96 /* 97 * Set error code according to errno 98 */ 99 void 100 fetch_syserr(void) 101 { 102 switch (errno) { 103 case 0: 104 fetchLastErrCode = FETCH_OK; 105 break; 106 case EPERM: 107 case EACCES: 108 case EROFS: 109 case EAUTH: 110 case ENEEDAUTH: 111 fetchLastErrCode = FETCH_AUTH; 112 break; 113 case ENOENT: 114 case EISDIR: /* XXX */ 115 fetchLastErrCode = FETCH_UNAVAIL; 116 break; 117 case ENOMEM: 118 fetchLastErrCode = FETCH_MEMORY; 119 break; 120 case EBUSY: 121 case EAGAIN: 122 fetchLastErrCode = FETCH_TEMP; 123 break; 124 case EEXIST: 125 fetchLastErrCode = FETCH_EXISTS; 126 break; 127 case ENOSPC: 128 fetchLastErrCode = FETCH_FULL; 129 break; 130 case EADDRINUSE: 131 case EADDRNOTAVAIL: 132 case ENETDOWN: 133 case ENETUNREACH: 134 case ENETRESET: 135 case EHOSTUNREACH: 136 fetchLastErrCode = FETCH_NETWORK; 137 break; 138 case ECONNABORTED: 139 case ECONNRESET: 140 fetchLastErrCode = FETCH_ABORT; 141 break; 142 case ETIMEDOUT: 143 fetchLastErrCode = FETCH_TIMEOUT; 144 break; 145 case ECONNREFUSED: 146 case EHOSTDOWN: 147 fetchLastErrCode = FETCH_DOWN; 148 break; 149 default: 150 fetchLastErrCode = FETCH_UNKNOWN; 151 } 152 snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno)); 153 } 154 155 156 /* 157 * Emit status message 158 */ 159 void 160 fetch_info(const char *fmt, ...) 161 { 162 va_list ap; 163 164 va_start(ap, fmt); 165 vfprintf(stderr, fmt, ap); 166 va_end(ap); 167 fputc('\n', stderr); 168 } 169 170 171 /*** Network-related utility functions ***************************************/ 172 173 /* 174 * Return the default port for a scheme 175 */ 176 int 177 fetch_default_port(const char *scheme) 178 { 179 struct servent *se; 180 181 if ((se = getservbyname(scheme, "tcp")) != NULL) 182 return (ntohs(se->s_port)); 183 if (strcasecmp(scheme, SCHEME_FTP) == 0) 184 return (FTP_DEFAULT_PORT); 185 if (strcasecmp(scheme, SCHEME_HTTP) == 0) 186 return (HTTP_DEFAULT_PORT); 187 return (0); 188 } 189 190 /* 191 * Return the default proxy port for a scheme 192 */ 193 int 194 fetch_default_proxy_port(const char *scheme) 195 { 196 if (strcasecmp(scheme, SCHEME_FTP) == 0) 197 return (FTP_DEFAULT_PROXY_PORT); 198 if (strcasecmp(scheme, SCHEME_HTTP) == 0) 199 return (HTTP_DEFAULT_PROXY_PORT); 200 return (0); 201 } 202 203 204 /* 205 * Create a connection for an existing descriptor. 206 */ 207 conn_t * 208 fetch_reopen(int sd) 209 { 210 conn_t *conn; 211 212 /* allocate and fill connection structure */ 213 if ((conn = calloc(1, sizeof(*conn))) == NULL) 214 return (NULL); 215 conn->sd = sd; 216 ++conn->ref; 217 return (conn); 218 } 219 220 221 /* 222 * Bump a connection's reference count. 223 */ 224 conn_t * 225 fetch_ref(conn_t *conn) 226 { 227 228 ++conn->ref; 229 return (conn); 230 } 231 232 233 /* 234 * Bind a socket to a specific local address 235 */ 236 int 237 fetch_bind(int sd, int af, const char *addr) 238 { 239 struct addrinfo hints, *res, *res0; 240 int err; 241 242 memset(&hints, 0, sizeof(hints)); 243 hints.ai_family = af; 244 hints.ai_socktype = SOCK_STREAM; 245 hints.ai_protocol = 0; 246 if ((err = getaddrinfo(addr, NULL, &hints, &res0)) != 0) 247 return (-1); 248 for (res = res0; res; res = res->ai_next) 249 if (bind(sd, res->ai_addr, res->ai_addrlen) == 0) 250 return (0); 251 return (-1); 252 } 253 254 255 /* 256 * Establish a TCP connection to the specified port on the specified host. 257 */ 258 conn_t * 259 fetch_connect(const char *host, int port, int af, int verbose) 260 { 261 conn_t *conn; 262 char pbuf[10]; 263 const char *bindaddr; 264 struct addrinfo hints, *res, *res0; 265 int sd, err; 266 267 DEBUG(fprintf(stderr, "---> %s:%d\n", host, port)); 268 269 if (verbose) 270 fetch_info("looking up %s", host); 271 272 /* look up host name and set up socket address structure */ 273 snprintf(pbuf, sizeof(pbuf), "%d", port); 274 memset(&hints, 0, sizeof(hints)); 275 hints.ai_family = af; 276 hints.ai_socktype = SOCK_STREAM; 277 hints.ai_protocol = 0; 278 if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) { 279 netdb_seterr(err); 280 return (NULL); 281 } 282 bindaddr = getenv("FETCH_BIND_ADDRESS"); 283 284 if (verbose) 285 fetch_info("connecting to %s:%d", host, port); 286 287 /* try to connect */ 288 for (sd = -1, res = res0; res; sd = -1, res = res->ai_next) { 289 if ((sd = socket(res->ai_family, res->ai_socktype, 290 res->ai_protocol)) == -1) 291 continue; 292 if (bindaddr != NULL && *bindaddr != '\0' && 293 fetch_bind(sd, res->ai_family, bindaddr) != 0) { 294 fetch_info("failed to bind to '%s'", bindaddr); 295 close(sd); 296 continue; 297 } 298 if (connect(sd, res->ai_addr, res->ai_addrlen) == 0 && 299 fcntl(sd, F_SETFL, O_NONBLOCK) == 0) 300 break; 301 close(sd); 302 } 303 freeaddrinfo(res0); 304 if (sd == -1) { 305 fetch_syserr(); 306 return (NULL); 307 } 308 309 if ((conn = fetch_reopen(sd)) == NULL) { 310 fetch_syserr(); 311 close(sd); 312 } 313 return (conn); 314 } 315 316 317 /* 318 * Enable SSL on a connection. 319 */ 320 int 321 fetch_ssl(conn_t *conn, int verbose) 322 { 323 int ret, ssl_err; 324 325 #ifdef WITH_SSL 326 /* Init the SSL library and context */ 327 if (!SSL_library_init()){ 328 fprintf(stderr, "SSL library init failed\n"); 329 return (-1); 330 } 331 332 SSL_load_error_strings(); 333 334 conn->ssl_meth = SSLv23_client_method(); 335 conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth); 336 SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY); 337 338 conn->ssl = SSL_new(conn->ssl_ctx); 339 if (conn->ssl == NULL){ 340 fprintf(stderr, "SSL context creation failed\n"); 341 return (-1); 342 } 343 SSL_set_fd(conn->ssl, conn->sd); 344 while ((ret = SSL_connect(conn->ssl)) == -1) { 345 ssl_err = SSL_get_error(conn->ssl, ret); 346 if (ssl_err != SSL_ERROR_WANT_READ && 347 ssl_err != SSL_ERROR_WANT_WRITE) { 348 ERR_print_errors_fp(stderr); 349 return (-1); 350 } 351 } 352 353 if (verbose) { 354 X509_NAME *name; 355 char *str; 356 357 fprintf(stderr, "SSL connection established using %s\n", 358 SSL_get_cipher(conn->ssl)); 359 conn->ssl_cert = SSL_get_peer_certificate(conn->ssl); 360 name = X509_get_subject_name(conn->ssl_cert); 361 str = X509_NAME_oneline(name, 0, 0); 362 printf("Certificate subject: %s\n", str); 363 free(str); 364 name = X509_get_issuer_name(conn->ssl_cert); 365 str = X509_NAME_oneline(name, 0, 0); 366 printf("Certificate issuer: %s\n", str); 367 free(str); 368 } 369 370 return (0); 371 #else 372 (void)conn; 373 (void)verbose; 374 fprintf(stderr, "SSL support disabled\n"); 375 return (-1); 376 #endif 377 } 378 379 #define FETCH_READ_WAIT -2 380 #define FETCH_READ_ERROR -1 381 #define FETCH_READ_DONE 0 382 383 #ifdef WITH_SSL 384 static ssize_t 385 fetch_ssl_read(SSL *ssl, char *buf, size_t len) 386 { 387 ssize_t rlen; 388 int ssl_err; 389 390 rlen = SSL_read(ssl, buf, len); 391 if (rlen < 0) { 392 ssl_err = SSL_get_error(ssl, rlen); 393 if (ssl_err == SSL_ERROR_WANT_READ || 394 ssl_err == SSL_ERROR_WANT_WRITE) { 395 return (FETCH_READ_WAIT); 396 } else { 397 ERR_print_errors_fp(stderr); 398 return (FETCH_READ_ERROR); 399 } 400 } 401 return (rlen); 402 } 403 #endif 404 405 static ssize_t 406 fetch_socket_read(int sd, char *buf, size_t len) 407 { 408 ssize_t rlen; 409 410 rlen = read(sd, buf, len); 411 if (rlen < 0) { 412 if (errno == EAGAIN || (errno == EINTR && fetchRestartCalls)) 413 return (FETCH_READ_WAIT); 414 else 415 return (FETCH_READ_ERROR); 416 } 417 return (rlen); 418 } 419 420 /* 421 * Read a character from a connection w/ timeout 422 */ 423 ssize_t 424 fetch_read(conn_t *conn, char *buf, size_t len) 425 { 426 struct timeval now, timeout, delta; 427 fd_set readfds; 428 ssize_t rlen, total; 429 int r; 430 431 if (fetchTimeout) { 432 FD_ZERO(&readfds); 433 gettimeofday(&timeout, NULL); 434 timeout.tv_sec += fetchTimeout; 435 } 436 437 total = 0; 438 while (len > 0) { 439 /* 440 * The socket is non-blocking. Instead of the canonical 441 * select() -> read(), we do the following: 442 * 443 * 1) call read() or SSL_read(). 444 * 2) if an error occurred, return -1. 445 * 3) if we received data but we still expect more, 446 * update our counters and loop. 447 * 4) if read() or SSL_read() signaled EOF, return. 448 * 5) if we did not receive any data but we're not at EOF, 449 * call select(). 450 * 451 * In the SSL case, this is necessary because if we 452 * receive a close notification, we have to call 453 * SSL_read() one additional time after we've read 454 * everything we received. 455 * 456 * In the non-SSL case, it may improve performance (very 457 * slightly) when reading small amounts of data. 458 */ 459 #ifdef WITH_SSL 460 if (conn->ssl != NULL) 461 rlen = fetch_ssl_read(conn->ssl, buf, len); 462 else 463 #endif 464 rlen = fetch_socket_read(conn->sd, buf, len); 465 if (rlen == 0) { 466 break; 467 } else if (rlen > 0) { 468 len -= rlen; 469 buf += rlen; 470 total += rlen; 471 continue; 472 } else if (rlen == FETCH_READ_ERROR) { 473 return (-1); 474 } 475 // assert(rlen == FETCH_READ_WAIT); 476 while (fetchTimeout && !FD_ISSET(conn->sd, &readfds)) { 477 FD_SET(conn->sd, &readfds); 478 gettimeofday(&now, NULL); 479 delta.tv_sec = timeout.tv_sec - now.tv_sec; 480 delta.tv_usec = timeout.tv_usec - now.tv_usec; 481 if (delta.tv_usec < 0) { 482 delta.tv_usec += 1000000; 483 delta.tv_sec--; 484 } 485 if (delta.tv_sec < 0) { 486 errno = ETIMEDOUT; 487 fetch_syserr(); 488 return (-1); 489 } 490 errno = 0; 491 r = select(conn->sd + 1, &readfds, NULL, NULL, &delta); 492 if (r == -1) { 493 if (errno == EINTR && fetchRestartCalls) 494 continue; 495 fetch_syserr(); 496 return (-1); 497 } 498 } 499 } 500 return (total); 501 } 502 503 504 /* 505 * Read a line of text from a connection w/ timeout 506 */ 507 #define MIN_BUF_SIZE 1024 508 509 int 510 fetch_getln(conn_t *conn) 511 { 512 char *tmp; 513 size_t tmpsize; 514 ssize_t len; 515 char c; 516 517 if (conn->buf == NULL) { 518 if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) { 519 errno = ENOMEM; 520 return (-1); 521 } 522 conn->bufsize = MIN_BUF_SIZE; 523 } 524 525 conn->buf[0] = '\0'; 526 conn->buflen = 0; 527 528 do { 529 len = fetch_read(conn, &c, 1); 530 if (len == -1) 531 return (-1); 532 if (len == 0) 533 break; 534 conn->buf[conn->buflen++] = c; 535 if (conn->buflen == conn->bufsize) { 536 tmp = conn->buf; 537 tmpsize = conn->bufsize * 2 + 1; 538 if ((tmp = realloc(tmp, tmpsize)) == NULL) { 539 errno = ENOMEM; 540 return (-1); 541 } 542 conn->buf = tmp; 543 conn->bufsize = tmpsize; 544 } 545 } while (c != '\n'); 546 547 conn->buf[conn->buflen] = '\0'; 548 DEBUG(fprintf(stderr, "<<< %s", conn->buf)); 549 return (0); 550 } 551 552 553 /* 554 * Write to a connection w/ timeout 555 */ 556 ssize_t 557 fetch_write(conn_t *conn, const char *buf, size_t len) 558 { 559 struct iovec iov; 560 561 iov.iov_base = __DECONST(char *, buf); 562 iov.iov_len = len; 563 return fetch_writev(conn, &iov, 1); 564 } 565 566 /* 567 * Write a vector to a connection w/ timeout 568 * Note: can modify the iovec. 569 */ 570 ssize_t 571 fetch_writev(conn_t *conn, struct iovec *iov, int iovcnt) 572 { 573 struct timeval now, timeout, delta; 574 fd_set writefds; 575 ssize_t wlen, total; 576 int r; 577 578 if (fetchTimeout) { 579 FD_ZERO(&writefds); 580 gettimeofday(&timeout, NULL); 581 timeout.tv_sec += fetchTimeout; 582 } 583 584 total = 0; 585 while (iovcnt > 0) { 586 while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) { 587 FD_SET(conn->sd, &writefds); 588 gettimeofday(&now, NULL); 589 delta.tv_sec = timeout.tv_sec - now.tv_sec; 590 delta.tv_usec = timeout.tv_usec - now.tv_usec; 591 if (delta.tv_usec < 0) { 592 delta.tv_usec += 1000000; 593 delta.tv_sec--; 594 } 595 if (delta.tv_sec < 0) { 596 errno = ETIMEDOUT; 597 fetch_syserr(); 598 return (-1); 599 } 600 errno = 0; 601 r = select(conn->sd + 1, NULL, &writefds, NULL, &delta); 602 if (r == -1) { 603 if (errno == EINTR && fetchRestartCalls) 604 continue; 605 return (-1); 606 } 607 } 608 errno = 0; 609 #ifdef WITH_SSL 610 if (conn->ssl != NULL) 611 wlen = SSL_write(conn->ssl, 612 iov->iov_base, iov->iov_len); 613 else 614 #endif 615 wlen = writev(conn->sd, iov, iovcnt); 616 if (wlen == 0) { 617 /* we consider a short write a failure */ 618 /* XXX perhaps we shouldn't in the SSL case */ 619 errno = EPIPE; 620 fetch_syserr(); 621 return (-1); 622 } 623 if (wlen < 0) { 624 if (errno == EINTR && fetchRestartCalls) 625 continue; 626 return (-1); 627 } 628 total += wlen; 629 while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) { 630 wlen -= iov->iov_len; 631 iov++; 632 iovcnt--; 633 } 634 if (iovcnt > 0) { 635 iov->iov_len -= wlen; 636 iov->iov_base = __DECONST(char *, iov->iov_base) + wlen; 637 } 638 } 639 return (total); 640 } 641 642 643 /* 644 * Write a line of text to a connection w/ timeout 645 */ 646 int 647 fetch_putln(conn_t *conn, const char *str, size_t len) 648 { 649 struct iovec iov[2]; 650 int ret; 651 652 DEBUG(fprintf(stderr, ">>> %s\n", str)); 653 iov[0].iov_base = __DECONST(char *, str); 654 iov[0].iov_len = len; 655 iov[1].iov_base = __DECONST(char *, ENDL); 656 iov[1].iov_len = sizeof(ENDL); 657 if (len == 0) 658 ret = fetch_writev(conn, &iov[1], 1); 659 else 660 ret = fetch_writev(conn, iov, 2); 661 if (ret == -1) 662 return (-1); 663 return (0); 664 } 665 666 667 /* 668 * Close connection 669 */ 670 int 671 fetch_close(conn_t *conn) 672 { 673 int ret; 674 675 if (--conn->ref > 0) 676 return (0); 677 ret = close(conn->sd); 678 free(conn->buf); 679 free(conn); 680 return (ret); 681 } 682 683 684 /*** Directory-related utility functions *************************************/ 685 686 int 687 fetch_add_entry(struct url_ent **p, int *size, int *len, 688 const char *name, struct url_stat *us) 689 { 690 struct url_ent *tmp; 691 692 if (*p == NULL) { 693 *size = 0; 694 *len = 0; 695 } 696 697 if (*len >= *size - 1) { 698 tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p)); 699 if (tmp == NULL) { 700 errno = ENOMEM; 701 fetch_syserr(); 702 return (-1); 703 } 704 *size = (*size * 2 + 1); 705 *p = tmp; 706 } 707 708 tmp = *p + *len; 709 snprintf(tmp->name, PATH_MAX, "%s", name); 710 memcpy(&tmp->stat, us, sizeof(*us)); 711 712 (*len)++; 713 (++tmp)->name[0] = 0; 714 715 return (0); 716 } 717 718 719 /*** Authentication-related utility functions ********************************/ 720 721 static const char * 722 fetch_read_word(FILE *f) 723 { 724 static char word[1024]; 725 726 if (fscanf(f, " %1023s ", word) != 1) 727 return (NULL); 728 return (word); 729 } 730 731 /* 732 * Get authentication data for a URL from .netrc 733 */ 734 int 735 fetch_netrc_auth(struct url *url) 736 { 737 char fn[PATH_MAX]; 738 const char *word; 739 char *p; 740 FILE *f; 741 742 if ((p = getenv("NETRC")) != NULL) { 743 if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) { 744 fetch_info("$NETRC specifies a file name " 745 "longer than PATH_MAX"); 746 return (-1); 747 } 748 } else { 749 if ((p = getenv("HOME")) != NULL) { 750 struct passwd *pwd; 751 752 if ((pwd = getpwuid(getuid())) == NULL || 753 (p = pwd->pw_dir) == NULL) 754 return (-1); 755 } 756 if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn)) 757 return (-1); 758 } 759 760 if ((f = fopen(fn, "r")) == NULL) 761 return (-1); 762 while ((word = fetch_read_word(f)) != NULL) { 763 if (strcmp(word, "default") == 0) { 764 DEBUG(fetch_info("Using default .netrc settings")); 765 break; 766 } 767 if (strcmp(word, "machine") == 0 && 768 (word = fetch_read_word(f)) != NULL && 769 strcasecmp(word, url->host) == 0) { 770 DEBUG(fetch_info("Using .netrc settings for %s", word)); 771 break; 772 } 773 } 774 if (word == NULL) 775 goto ferr; 776 while ((word = fetch_read_word(f)) != NULL) { 777 if (strcmp(word, "login") == 0) { 778 if ((word = fetch_read_word(f)) == NULL) 779 goto ferr; 780 if (snprintf(url->user, sizeof(url->user), 781 "%s", word) > (int)sizeof(url->user)) { 782 fetch_info("login name in .netrc is too long"); 783 url->user[0] = '\0'; 784 } 785 } else if (strcmp(word, "password") == 0) { 786 if ((word = fetch_read_word(f)) == NULL) 787 goto ferr; 788 if (snprintf(url->pwd, sizeof(url->pwd), 789 "%s", word) > (int)sizeof(url->pwd)) { 790 fetch_info("password in .netrc is too long"); 791 url->pwd[0] = '\0'; 792 } 793 } else if (strcmp(word, "account") == 0) { 794 if ((word = fetch_read_word(f)) == NULL) 795 goto ferr; 796 /* XXX not supported! */ 797 } else { 798 break; 799 } 800 } 801 fclose(f); 802 return (0); 803 ferr: 804 fclose(f); 805 return (-1); 806 } 807 808 /* 809 * The no_proxy environment variable specifies a set of domains for 810 * which the proxy should not be consulted; the contents is a comma-, 811 * or space-separated list of domain names. A single asterisk will 812 * override all proxy variables and no transactions will be proxied 813 * (for compatability with lynx and curl, see the discussion at 814 * <http://curl.haxx.se/mail/archive_pre_oct_99/0009.html>). 815 */ 816 int 817 fetch_no_proxy_match(const char *host) 818 { 819 const char *no_proxy, *p, *q; 820 size_t h_len, d_len; 821 822 if ((no_proxy = getenv("NO_PROXY")) == NULL && 823 (no_proxy = getenv("no_proxy")) == NULL) 824 return (0); 825 826 /* asterisk matches any hostname */ 827 if (strcmp(no_proxy, "*") == 0) 828 return (1); 829 830 h_len = strlen(host); 831 p = no_proxy; 832 do { 833 /* position p at the beginning of a domain suffix */ 834 while (*p == ',' || isspace((unsigned char)*p)) 835 p++; 836 837 /* position q at the first separator character */ 838 for (q = p; *q; ++q) 839 if (*q == ',' || isspace((unsigned char)*q)) 840 break; 841 842 d_len = q - p; 843 if (d_len > 0 && h_len >= d_len && 844 strncasecmp(host + h_len - d_len, 845 p, d_len) == 0) { 846 /* domain name matches */ 847 return (1); 848 } 849 850 p = q + 1; 851 } while (*q); 852 853 return (0); 854 } 855