common.c revision 210568
140939Sdes/*- 2135546Sdes * Copyright (c) 1998-2004 Dag-Erling Co�dan Sm�rgrav 340939Sdes * All rights reserved. 440939Sdes * 540939Sdes * Redistribution and use in source and binary forms, with or without 640939Sdes * modification, are permitted provided that the following conditions 740939Sdes * are met: 840939Sdes * 1. Redistributions of source code must retain the above copyright 940939Sdes * notice, this list of conditions and the following disclaimer 1040939Sdes * in this position and unchanged. 1140939Sdes * 2. Redistributions in binary form must reproduce the above copyright 1240939Sdes * notice, this list of conditions and the following disclaimer in the 1340939Sdes * documentation and/or other materials provided with the distribution. 1440939Sdes * 3. The name of the author may not be used to endorse or promote products 1540939Sdes * derived from this software without specific prior written permission 1640939Sdes * 1740939Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1840939Sdes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1940939Sdes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2040939Sdes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2140939Sdes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2240939Sdes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2340939Sdes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2440939Sdes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2540939Sdes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2640939Sdes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2740939Sdes */ 2840939Sdes 2984203Sdillon#include <sys/cdefs.h> 3084203Sdillon__FBSDID("$FreeBSD: head/lib/libfetch/common.c 210568 2010-07-28 16:11:22Z des $"); 3184203Sdillon 3241862Sdes#include <sys/param.h> 3340939Sdes#include <sys/socket.h> 3455557Sdes#include <sys/time.h> 3562981Sdes#include <sys/uio.h> 36174752Sdes 3740939Sdes#include <netinet/in.h> 3840939Sdes 39174752Sdes#include <ctype.h> 4040939Sdes#include <errno.h> 41210568Sdes#include <fcntl.h> 4240939Sdes#include <netdb.h> 43109695Sdes#include <pwd.h> 4460924Sdes#include <stdarg.h> 4541862Sdes#include <stdlib.h> 4641862Sdes#include <stdio.h> 4740939Sdes#include <string.h> 4840939Sdes#include <unistd.h> 4940939Sdes 5040939Sdes#include "fetch.h" 5140939Sdes#include "common.h" 5240939Sdes 5340975Sdes 5440939Sdes/*** Local data **************************************************************/ 5540939Sdes 5640939Sdes/* 5740939Sdes * Error messages for resolver errors 5840939Sdes */ 59174588Sdesstatic struct fetcherr netdb_errlist[] = { 60121423Sume#ifdef EAI_NODATA 6190267Sdes { EAI_NODATA, FETCH_RESOLV, "Host not found" }, 62121423Sume#endif 6390267Sdes { EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" }, 6490267Sdes { EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" }, 6590267Sdes { EAI_NONAME, FETCH_RESOLV, "No address record" }, 6690267Sdes { -1, FETCH_UNKNOWN, "Unknown resolver error" } 6740939Sdes}; 6840939Sdes 6962981Sdes/* End-of-Line */ 7075891Sarchiestatic const char ENDL[2] = "\r\n"; 7140939Sdes 7262981Sdes 7340939Sdes/*** Error-reporting functions ***********************************************/ 7440939Sdes 7540939Sdes/* 7640939Sdes * Map error code to string 7740939Sdes */ 7860924Sdesstatic struct fetcherr * 79174588Sdesfetch_finderr(struct fetcherr *p, int e) 8040939Sdes{ 8190267Sdes while (p->num != -1 && p->num != e) 8290267Sdes p++; 8390267Sdes return (p); 8440939Sdes} 8540939Sdes 8640939Sdes/* 8740939Sdes * Set error code 8840939Sdes */ 8940939Sdesvoid 90174588Sdesfetch_seterr(struct fetcherr *p, int e) 9140939Sdes{ 92174588Sdes p = fetch_finderr(p, e); 9390267Sdes fetchLastErrCode = p->cat; 9490267Sdes snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string); 9540939Sdes} 9640939Sdes 9740939Sdes/* 9840939Sdes * Set error code according to errno 9940939Sdes */ 10040939Sdesvoid 101174588Sdesfetch_syserr(void) 10240939Sdes{ 10390267Sdes switch (errno) { 10490267Sdes case 0: 10590267Sdes fetchLastErrCode = FETCH_OK; 10690267Sdes break; 10790267Sdes case EPERM: 10890267Sdes case EACCES: 10990267Sdes case EROFS: 11090267Sdes case EAUTH: 11190267Sdes case ENEEDAUTH: 11290267Sdes fetchLastErrCode = FETCH_AUTH; 11390267Sdes break; 11490267Sdes case ENOENT: 11590267Sdes case EISDIR: /* XXX */ 11690267Sdes fetchLastErrCode = FETCH_UNAVAIL; 11790267Sdes break; 11890267Sdes case ENOMEM: 11990267Sdes fetchLastErrCode = FETCH_MEMORY; 12090267Sdes break; 12190267Sdes case EBUSY: 12290267Sdes case EAGAIN: 12390267Sdes fetchLastErrCode = FETCH_TEMP; 12490267Sdes break; 12590267Sdes case EEXIST: 12690267Sdes fetchLastErrCode = FETCH_EXISTS; 12790267Sdes break; 12890267Sdes case ENOSPC: 12990267Sdes fetchLastErrCode = FETCH_FULL; 13090267Sdes break; 13190267Sdes case EADDRINUSE: 13290267Sdes case EADDRNOTAVAIL: 13390267Sdes case ENETDOWN: 13490267Sdes case ENETUNREACH: 13590267Sdes case ENETRESET: 13690267Sdes case EHOSTUNREACH: 13790267Sdes fetchLastErrCode = FETCH_NETWORK; 13890267Sdes break; 13990267Sdes case ECONNABORTED: 14090267Sdes case ECONNRESET: 14190267Sdes fetchLastErrCode = FETCH_ABORT; 14290267Sdes break; 14390267Sdes case ETIMEDOUT: 14490267Sdes fetchLastErrCode = FETCH_TIMEOUT; 14590267Sdes break; 14690267Sdes case ECONNREFUSED: 14790267Sdes case EHOSTDOWN: 14890267Sdes fetchLastErrCode = FETCH_DOWN; 14990267Sdes break; 15090267Sdesdefault: 15190267Sdes fetchLastErrCode = FETCH_UNKNOWN; 15290267Sdes } 15390267Sdes snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno)); 15440939Sdes} 15540939Sdes 15640939Sdes 15741862Sdes/* 15841862Sdes * Emit status message 15941862Sdes */ 16060924Sdesvoid 161174588Sdesfetch_info(const char *fmt, ...) 16241862Sdes{ 16390267Sdes va_list ap; 16490267Sdes 16590267Sdes va_start(ap, fmt); 16690267Sdes vfprintf(stderr, fmt, ap); 16790267Sdes va_end(ap); 16890267Sdes fputc('\n', stderr); 16941862Sdes} 17041862Sdes 17141862Sdes 17240939Sdes/*** Network-related utility functions ***************************************/ 17340939Sdes 17440939Sdes/* 17568551Sdes * Return the default port for a scheme 17668551Sdes */ 17768551Sdesint 178174588Sdesfetch_default_port(const char *scheme) 17968551Sdes{ 18090267Sdes struct servent *se; 18168551Sdes 18290267Sdes if ((se = getservbyname(scheme, "tcp")) != NULL) 18390267Sdes return (ntohs(se->s_port)); 18490267Sdes if (strcasecmp(scheme, SCHEME_FTP) == 0) 18590267Sdes return (FTP_DEFAULT_PORT); 18690267Sdes if (strcasecmp(scheme, SCHEME_HTTP) == 0) 18790267Sdes return (HTTP_DEFAULT_PORT); 18890267Sdes return (0); 18968551Sdes} 19068551Sdes 19168551Sdes/* 19268551Sdes * Return the default proxy port for a scheme 19368551Sdes */ 19468551Sdesint 195174588Sdesfetch_default_proxy_port(const char *scheme) 19668551Sdes{ 19790267Sdes if (strcasecmp(scheme, SCHEME_FTP) == 0) 19890267Sdes return (FTP_DEFAULT_PROXY_PORT); 19990267Sdes if (strcasecmp(scheme, SCHEME_HTTP) == 0) 20090267Sdes return (HTTP_DEFAULT_PROXY_PORT); 20190267Sdes return (0); 20268551Sdes} 20368551Sdes 20498117Sdes 20568551Sdes/* 20697866Sdes * Create a connection for an existing descriptor. 20797866Sdes */ 20897866Sdesconn_t * 209174588Sdesfetch_reopen(int sd) 21097866Sdes{ 21197866Sdes conn_t *conn; 21297866Sdes 21397866Sdes /* allocate and fill connection structure */ 214109967Sdes if ((conn = calloc(1, sizeof(*conn))) == NULL) 21597866Sdes return (NULL); 21697866Sdes conn->sd = sd; 21798117Sdes ++conn->ref; 21897866Sdes return (conn); 21997866Sdes} 22097866Sdes 22197866Sdes 22297866Sdes/* 22398117Sdes * Bump a connection's reference count. 22498117Sdes */ 22598117Sdesconn_t * 226174588Sdesfetch_ref(conn_t *conn) 22798117Sdes{ 22898117Sdes 22998117Sdes ++conn->ref; 23098117Sdes return (conn); 23198117Sdes} 23298117Sdes 23398117Sdes 23498117Sdes/* 235111816Sdes * Bind a socket to a specific local address 236111816Sdes */ 237111816Sdesint 238174588Sdesfetch_bind(int sd, int af, const char *addr) 239111816Sdes{ 240111816Sdes struct addrinfo hints, *res, *res0; 241111816Sdes int err; 242111816Sdes 243111816Sdes memset(&hints, 0, sizeof(hints)); 244111816Sdes hints.ai_family = af; 245111816Sdes hints.ai_socktype = SOCK_STREAM; 246111816Sdes hints.ai_protocol = 0; 247111816Sdes if ((err = getaddrinfo(addr, NULL, &hints, &res0)) != 0) 248111816Sdes return (-1); 249111816Sdes for (res = res0; res; res = res->ai_next) 250111816Sdes if (bind(sd, res->ai_addr, res->ai_addrlen) == 0) 251111816Sdes return (0); 252111816Sdes return (-1); 253111816Sdes} 254111816Sdes 255111816Sdes 256111816Sdes/* 25740939Sdes * Establish a TCP connection to the specified port on the specified host. 25840939Sdes */ 25997856Sdesconn_t * 260174588Sdesfetch_connect(const char *host, int port, int af, int verbose) 26140939Sdes{ 26297856Sdes conn_t *conn; 26390267Sdes char pbuf[10]; 264111816Sdes const char *bindaddr; 26590267Sdes struct addrinfo hints, *res, *res0; 26690267Sdes int sd, err; 26740939Sdes 26890267Sdes DEBUG(fprintf(stderr, "---> %s:%d\n", host, port)); 26941862Sdes 27090267Sdes if (verbose) 271174588Sdes fetch_info("looking up %s", host); 27240939Sdes 27390267Sdes /* look up host name and set up socket address structure */ 27490267Sdes snprintf(pbuf, sizeof(pbuf), "%d", port); 27590267Sdes memset(&hints, 0, sizeof(hints)); 27690267Sdes hints.ai_family = af; 27790267Sdes hints.ai_socktype = SOCK_STREAM; 27890267Sdes hints.ai_protocol = 0; 27990267Sdes if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) { 280174588Sdes netdb_seterr(err); 28197856Sdes return (NULL); 28290267Sdes } 283111816Sdes bindaddr = getenv("FETCH_BIND_ADDRESS"); 28490267Sdes 28590267Sdes if (verbose) 286174588Sdes fetch_info("connecting to %s:%d", host, port); 28790267Sdes 28890267Sdes /* try to connect */ 289111816Sdes for (sd = -1, res = res0; res; sd = -1, res = res->ai_next) { 29090267Sdes if ((sd = socket(res->ai_family, res->ai_socktype, 29162981Sdes res->ai_protocol)) == -1) 29290267Sdes continue; 293111816Sdes if (bindaddr != NULL && *bindaddr != '\0' && 294174588Sdes fetch_bind(sd, res->ai_family, bindaddr) != 0) { 295174588Sdes fetch_info("failed to bind to '%s'", bindaddr); 296111816Sdes close(sd); 297111816Sdes continue; 298111816Sdes } 299210568Sdes if (connect(sd, res->ai_addr, res->ai_addrlen) == 0 && 300210568Sdes fcntl(sd, F_SETFL, O_NONBLOCK) == 0) 30190267Sdes break; 30290267Sdes close(sd); 30390267Sdes } 30490267Sdes freeaddrinfo(res0); 30590267Sdes if (sd == -1) { 306174588Sdes fetch_syserr(); 30797856Sdes return (NULL); 30890267Sdes } 30940939Sdes 310174588Sdes if ((conn = fetch_reopen(sd)) == NULL) { 311174588Sdes fetch_syserr(); 31297856Sdes close(sd); 313103459Sfenner } 31497856Sdes return (conn); 31540939Sdes} 31641989Sdes 31741989Sdes 31855557Sdes/* 31997868Sdes * Enable SSL on a connection. 32097868Sdes */ 32197868Sdesint 322174588Sdesfetch_ssl(conn_t *conn, int verbose) 32397868Sdes{ 324210568Sdes int ret, ssl_err; 32597868Sdes 32697891Sdes#ifdef WITH_SSL 32797868Sdes /* Init the SSL library and context */ 32897868Sdes if (!SSL_library_init()){ 32997868Sdes fprintf(stderr, "SSL library init failed\n"); 33097868Sdes return (-1); 33197868Sdes } 33297868Sdes 33397868Sdes SSL_load_error_strings(); 33497868Sdes 33597868Sdes conn->ssl_meth = SSLv23_client_method(); 33697868Sdes conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth); 337108579Sdes SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY); 33897868Sdes 33997868Sdes conn->ssl = SSL_new(conn->ssl_ctx); 34097868Sdes if (conn->ssl == NULL){ 34197868Sdes fprintf(stderr, "SSL context creation failed\n"); 34297868Sdes return (-1); 34397868Sdes } 34497868Sdes SSL_set_fd(conn->ssl, conn->sd); 345210568Sdes while ((ret = SSL_connect(conn->ssl)) == -1) { 346210568Sdes ssl_err = SSL_get_error(conn->ssl, ret); 347210568Sdes if (ssl_err != SSL_ERROR_WANT_READ && 348210568Sdes ssl_err != SSL_ERROR_WANT_WRITE) { 349210568Sdes ERR_print_errors_fp(stderr); 350210568Sdes return (-1); 351210568Sdes } 35297868Sdes } 35397868Sdes 35497868Sdes if (verbose) { 35597868Sdes X509_NAME *name; 35697868Sdes char *str; 35797868Sdes 35897868Sdes fprintf(stderr, "SSL connection established using %s\n", 35997868Sdes SSL_get_cipher(conn->ssl)); 36097868Sdes conn->ssl_cert = SSL_get_peer_certificate(conn->ssl); 36197868Sdes name = X509_get_subject_name(conn->ssl_cert); 36297868Sdes str = X509_NAME_oneline(name, 0, 0); 36397868Sdes printf("Certificate subject: %s\n", str); 36497868Sdes free(str); 36597868Sdes name = X509_get_issuer_name(conn->ssl_cert); 36697868Sdes str = X509_NAME_oneline(name, 0, 0); 36797868Sdes printf("Certificate issuer: %s\n", str); 36897868Sdes free(str); 36997868Sdes } 37097868Sdes 37197868Sdes return (0); 37297891Sdes#else 37397891Sdes (void)conn; 37497891Sdes (void)verbose; 37597891Sdes fprintf(stderr, "SSL support disabled\n"); 37697891Sdes return (-1); 37797891Sdes#endif 37897868Sdes} 37997868Sdes 380210568Sdes#define FETCH_READ_WAIT -2 381210568Sdes#define FETCH_READ_ERROR -1 382210568Sdes#define FETCH_READ_DONE 0 38398117Sdes 384210568Sdes#ifdef WITH_SSL 385210568Sdesstatic ssize_t 386210568Sdesfetch_ssl_read(SSL *ssl, char *buf, size_t len) 387210568Sdes{ 388210568Sdes ssize_t rlen; 389210568Sdes int ssl_err; 390210568Sdes 391210568Sdes rlen = SSL_read(ssl, buf, len); 392210568Sdes if (rlen < 0) { 393210568Sdes ssl_err = SSL_get_error(ssl, rlen); 394210568Sdes if (ssl_err == SSL_ERROR_WANT_READ || 395210568Sdes ssl_err == SSL_ERROR_WANT_WRITE) { 396210568Sdes return (FETCH_READ_WAIT); 397210568Sdes } else { 398210568Sdes ERR_print_errors_fp(stderr); 399210568Sdes return (FETCH_READ_ERROR); 400210568Sdes } 401210568Sdes } 402210568Sdes return (rlen); 403210568Sdes} 404210568Sdes#endif 405210568Sdes 406210568Sdesstatic ssize_t 407210568Sdesfetch_socket_read(int sd, char *buf, size_t len) 408210568Sdes{ 409210568Sdes ssize_t rlen; 410210568Sdes 411210568Sdes rlen = read(sd, buf, len); 412210568Sdes if (rlen < 0) { 413210568Sdes if (errno == EAGAIN || (errno == EINTR && fetchRestartCalls)) 414210568Sdes return (FETCH_READ_WAIT); 415210568Sdes else 416210568Sdes return (FETCH_READ_ERROR); 417210568Sdes } 418210568Sdes return (rlen); 419210568Sdes} 420210568Sdes 42197868Sdes/* 42297866Sdes * Read a character from a connection w/ timeout 42355557Sdes */ 42497866Sdesssize_t 425174588Sdesfetch_read(conn_t *conn, char *buf, size_t len) 42655557Sdes{ 427177447Sdes struct timeval now, timeout, delta; 42890267Sdes fd_set readfds; 42997866Sdes ssize_t rlen, total; 43090267Sdes int r; 43190267Sdes 43255557Sdes if (fetchTimeout) { 43397866Sdes FD_ZERO(&readfds); 43490267Sdes gettimeofday(&timeout, NULL); 43590267Sdes timeout.tv_sec += fetchTimeout; 43655557Sdes } 43790267Sdes 43897866Sdes total = 0; 43997866Sdes while (len > 0) { 440210568Sdes /* 441210568Sdes * The socket is non-blocking. Instead of the canonical 442210568Sdes * select() -> read(), we do the following: 443210568Sdes * 444210568Sdes * 1) call read() or SSL_read(). 445210568Sdes * 2) if an error occurred, return -1. 446210568Sdes * 3) if we received data but we still expect more, 447210568Sdes * update our counters and loop. 448210568Sdes * 4) if read() or SSL_read() signaled EOF, return. 449210568Sdes * 5) if we did not receive any data but we're not at EOF, 450210568Sdes * call select(). 451210568Sdes * 452210568Sdes * In the SSL case, this is necessary because if we 453210568Sdes * receive a close notification, we have to call 454210568Sdes * SSL_read() one additional time after we've read 455210568Sdes * everything we received. 456210568Sdes * 457210568Sdes * In the non-SSL case, it may improve performance (very 458210568Sdes * slightly) when reading small amounts of data. 459210568Sdes */ 460210568Sdes#ifdef WITH_SSL 461210568Sdes if (conn->ssl != NULL) 462210568Sdes rlen = fetch_ssl_read(conn->ssl, buf, len); 463210568Sdes else 464210568Sdes#endif 465210568Sdes rlen = fetch_socket_read(conn->sd, buf, len); 466210568Sdes if (rlen == 0) { 467210568Sdes break; 468210568Sdes } else if (rlen > 0) { 469210568Sdes len -= rlen; 470210568Sdes buf += rlen; 471210568Sdes total += rlen; 472210568Sdes continue; 473210568Sdes } else if (rlen == FETCH_READ_ERROR) { 474210568Sdes return (-1); 475210568Sdes } 476210568Sdes // assert(rlen == FETCH_READ_WAIT); 47797866Sdes while (fetchTimeout && !FD_ISSET(conn->sd, &readfds)) { 47897856Sdes FD_SET(conn->sd, &readfds); 47990267Sdes gettimeofday(&now, NULL); 480177447Sdes delta.tv_sec = timeout.tv_sec - now.tv_sec; 481177447Sdes delta.tv_usec = timeout.tv_usec - now.tv_usec; 482177447Sdes if (delta.tv_usec < 0) { 483177447Sdes delta.tv_usec += 1000000; 484177447Sdes delta.tv_sec--; 48590267Sdes } 486177447Sdes if (delta.tv_sec < 0) { 487106186Sdes errno = ETIMEDOUT; 488174588Sdes fetch_syserr(); 489106186Sdes return (-1); 490106186Sdes } 49197866Sdes errno = 0; 492177447Sdes r = select(conn->sd + 1, &readfds, NULL, NULL, &delta); 49390267Sdes if (r == -1) { 49490267Sdes if (errno == EINTR && fetchRestartCalls) 49590267Sdes continue; 496174588Sdes fetch_syserr(); 49790267Sdes return (-1); 49890267Sdes } 49990267Sdes } 50097866Sdes } 50197866Sdes return (total); 50297866Sdes} 50397866Sdes 50498117Sdes 50597866Sdes/* 50697866Sdes * Read a line of text from a connection w/ timeout 50797866Sdes */ 50897866Sdes#define MIN_BUF_SIZE 1024 50997866Sdes 51097866Sdesint 511174588Sdesfetch_getln(conn_t *conn) 51297866Sdes{ 51397866Sdes char *tmp; 51497866Sdes size_t tmpsize; 515106186Sdes ssize_t len; 51697866Sdes char c; 51797866Sdes 51897866Sdes if (conn->buf == NULL) { 51997866Sdes if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) { 52097866Sdes errno = ENOMEM; 52197866Sdes return (-1); 52297866Sdes } 52397866Sdes conn->bufsize = MIN_BUF_SIZE; 52497866Sdes } 52597866Sdes 52697866Sdes conn->buf[0] = '\0'; 52797866Sdes conn->buflen = 0; 52897866Sdes 52997866Sdes do { 530174588Sdes len = fetch_read(conn, &c, 1); 531106186Sdes if (len == -1) 53297866Sdes return (-1); 533106186Sdes if (len == 0) 534106137Sobrien break; 53597856Sdes conn->buf[conn->buflen++] = c; 53697856Sdes if (conn->buflen == conn->bufsize) { 53797856Sdes tmp = conn->buf; 53897856Sdes tmpsize = conn->bufsize * 2 + 1; 53997856Sdes if ((tmp = realloc(tmp, tmpsize)) == NULL) { 54090267Sdes errno = ENOMEM; 54190267Sdes return (-1); 54290267Sdes } 54397856Sdes conn->buf = tmp; 54497856Sdes conn->bufsize = tmpsize; 54590267Sdes } 54690267Sdes } while (c != '\n'); 54790267Sdes 54897856Sdes conn->buf[conn->buflen] = '\0'; 54997856Sdes DEBUG(fprintf(stderr, "<<< %s", conn->buf)); 55090267Sdes return (0); 55155557Sdes} 55255557Sdes 55355557Sdes 55462981Sdes/* 55597866Sdes * Write to a connection w/ timeout 55662981Sdes */ 55797866Sdesssize_t 558174588Sdesfetch_write(conn_t *conn, const char *buf, size_t len) 55997866Sdes{ 560106175Simp struct iovec iov; 561106175Simp 562106175Simp iov.iov_base = __DECONST(char *, buf); 563106175Simp iov.iov_len = len; 564174588Sdes return fetch_writev(conn, &iov, 1); 565106175Simp} 566106175Simp 567106175Simp/* 568106175Simp * Write a vector to a connection w/ timeout 569106175Simp * Note: can modify the iovec. 570106175Simp */ 571106175Simpssize_t 572174588Sdesfetch_writev(conn_t *conn, struct iovec *iov, int iovcnt) 573106175Simp{ 574177447Sdes struct timeval now, timeout, delta; 57597866Sdes fd_set writefds; 57697866Sdes ssize_t wlen, total; 57797866Sdes int r; 57897866Sdes 57997866Sdes if (fetchTimeout) { 58097866Sdes FD_ZERO(&writefds); 58197866Sdes gettimeofday(&timeout, NULL); 58297866Sdes timeout.tv_sec += fetchTimeout; 58397866Sdes } 58497866Sdes 585106175Simp total = 0; 586106175Simp while (iovcnt > 0) { 58797866Sdes while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) { 58897866Sdes FD_SET(conn->sd, &writefds); 58997866Sdes gettimeofday(&now, NULL); 590177447Sdes delta.tv_sec = timeout.tv_sec - now.tv_sec; 591177447Sdes delta.tv_usec = timeout.tv_usec - now.tv_usec; 592177447Sdes if (delta.tv_usec < 0) { 593177447Sdes delta.tv_usec += 1000000; 594177447Sdes delta.tv_sec--; 59597866Sdes } 596177447Sdes if (delta.tv_sec < 0) { 59797866Sdes errno = ETIMEDOUT; 598174588Sdes fetch_syserr(); 59997866Sdes return (-1); 60097866Sdes } 60197866Sdes errno = 0; 602177447Sdes r = select(conn->sd + 1, NULL, &writefds, NULL, &delta); 60397866Sdes if (r == -1) { 60497866Sdes if (errno == EINTR && fetchRestartCalls) 60597866Sdes continue; 60697866Sdes return (-1); 60797866Sdes } 60897866Sdes } 60997866Sdes errno = 0; 61097891Sdes#ifdef WITH_SSL 61197866Sdes if (conn->ssl != NULL) 612106175Simp wlen = SSL_write(conn->ssl, 613106175Simp iov->iov_base, iov->iov_len); 61497866Sdes else 61597891Sdes#endif 616106175Simp wlen = writev(conn->sd, iov, iovcnt); 617106175Simp if (wlen == 0) { 61897866Sdes /* we consider a short write a failure */ 619210568Sdes /* XXX perhaps we shouldn't in the SSL case */ 620106175Simp errno = EPIPE; 621174588Sdes fetch_syserr(); 62297866Sdes return (-1); 623106175Simp } 62497866Sdes if (wlen < 0) { 62597866Sdes if (errno == EINTR && fetchRestartCalls) 62697866Sdes continue; 62797866Sdes return (-1); 62897866Sdes } 62997866Sdes total += wlen; 630106175Simp while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) { 631106175Simp wlen -= iov->iov_len; 632106175Simp iov++; 633106175Simp iovcnt--; 634106175Simp } 635106175Simp if (iovcnt > 0) { 636106175Simp iov->iov_len -= wlen; 637106175Simp iov->iov_base = __DECONST(char *, iov->iov_base) + wlen; 638106175Simp } 63997866Sdes } 64097866Sdes return (total); 64197866Sdes} 64297866Sdes 64398117Sdes 64497866Sdes/* 64597866Sdes * Write a line of text to a connection w/ timeout 64697866Sdes */ 64762981Sdesint 648174588Sdesfetch_putln(conn_t *conn, const char *str, size_t len) 64962981Sdes{ 650106175Simp struct iovec iov[2]; 651106205Sdes int ret; 65298748Sdes 65398748Sdes DEBUG(fprintf(stderr, ">>> %s\n", str)); 654106175Simp iov[0].iov_base = __DECONST(char *, str); 655106175Simp iov[0].iov_len = len; 656106175Simp iov[1].iov_base = __DECONST(char *, ENDL); 657109967Sdes iov[1].iov_len = sizeof(ENDL); 658106205Sdes if (len == 0) 659174588Sdes ret = fetch_writev(conn, &iov[1], 1); 660106205Sdes else 661174588Sdes ret = fetch_writev(conn, iov, 2); 662106205Sdes if (ret == -1) 66390267Sdes return (-1); 66490267Sdes return (0); 66562981Sdes} 66662981Sdes 66762981Sdes 66897856Sdes/* 66997856Sdes * Close connection 67097856Sdes */ 67197856Sdesint 672174588Sdesfetch_close(conn_t *conn) 67397856Sdes{ 67497856Sdes int ret; 67597856Sdes 67698117Sdes if (--conn->ref > 0) 67798117Sdes return (0); 67897856Sdes ret = close(conn->sd); 679141970Sdes free(conn->buf); 68097856Sdes free(conn); 68197856Sdes return (ret); 68297856Sdes} 68397856Sdes 68497856Sdes 68541989Sdes/*** Directory-related utility functions *************************************/ 68641989Sdes 68741989Sdesint 688174588Sdesfetch_add_entry(struct url_ent **p, int *size, int *len, 68990267Sdes const char *name, struct url_stat *us) 69041989Sdes{ 69190267Sdes struct url_ent *tmp; 69241989Sdes 69390267Sdes if (*p == NULL) { 69490268Sdes *size = 0; 69590267Sdes *len = 0; 69641989Sdes } 69741989Sdes 69890267Sdes if (*len >= *size - 1) { 699109967Sdes tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p)); 70090267Sdes if (tmp == NULL) { 70190267Sdes errno = ENOMEM; 702174588Sdes fetch_syserr(); 70390267Sdes return (-1); 70490267Sdes } 70590268Sdes *size = (*size * 2 + 1); 70690267Sdes *p = tmp; 70790267Sdes } 70841989Sdes 70990267Sdes tmp = *p + *len; 71090267Sdes snprintf(tmp->name, PATH_MAX, "%s", name); 711176105Sdes memcpy(&tmp->stat, us, sizeof(*us)); 71241989Sdes 71390267Sdes (*len)++; 71490267Sdes (++tmp)->name[0] = 0; 71590267Sdes 71690267Sdes return (0); 71741989Sdes} 718109695Sdes 719109695Sdes 720109695Sdes/*** Authentication-related utility functions ********************************/ 721109695Sdes 722109695Sdesstatic const char * 723174588Sdesfetch_read_word(FILE *f) 724109695Sdes{ 725109695Sdes static char word[1024]; 726109695Sdes 727178234Scperciva if (fscanf(f, " %1023s ", word) != 1) 728109695Sdes return (NULL); 729109695Sdes return (word); 730109695Sdes} 731109695Sdes 732109695Sdes/* 733109695Sdes * Get authentication data for a URL from .netrc 734109695Sdes */ 735109695Sdesint 736174588Sdesfetch_netrc_auth(struct url *url) 737109695Sdes{ 738109695Sdes char fn[PATH_MAX]; 739109695Sdes const char *word; 740109695Sdes char *p; 741109695Sdes FILE *f; 742109695Sdes 743109695Sdes if ((p = getenv("NETRC")) != NULL) { 744109967Sdes if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) { 745174588Sdes fetch_info("$NETRC specifies a file name " 746109695Sdes "longer than PATH_MAX"); 747109695Sdes return (-1); 748109695Sdes } 749109695Sdes } else { 750109695Sdes if ((p = getenv("HOME")) != NULL) { 751109695Sdes struct passwd *pwd; 752109695Sdes 753109695Sdes if ((pwd = getpwuid(getuid())) == NULL || 754109695Sdes (p = pwd->pw_dir) == NULL) 755109695Sdes return (-1); 756109695Sdes } 757109967Sdes if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn)) 758109695Sdes return (-1); 759109695Sdes } 760109695Sdes 761109695Sdes if ((f = fopen(fn, "r")) == NULL) 762109695Sdes return (-1); 763174588Sdes while ((word = fetch_read_word(f)) != NULL) { 764109695Sdes if (strcmp(word, "default") == 0) { 765174588Sdes DEBUG(fetch_info("Using default .netrc settings")); 766109695Sdes break; 767109695Sdes } 768109695Sdes if (strcmp(word, "machine") == 0 && 769174588Sdes (word = fetch_read_word(f)) != NULL && 770109695Sdes strcasecmp(word, url->host) == 0) { 771174588Sdes DEBUG(fetch_info("Using .netrc settings for %s", word)); 772109695Sdes break; 773109695Sdes } 774109695Sdes } 775109695Sdes if (word == NULL) 776109695Sdes goto ferr; 777174588Sdes while ((word = fetch_read_word(f)) != NULL) { 778109695Sdes if (strcmp(word, "login") == 0) { 779174588Sdes if ((word = fetch_read_word(f)) == NULL) 780109695Sdes goto ferr; 781109967Sdes if (snprintf(url->user, sizeof(url->user), 782109960Sjwd "%s", word) > (int)sizeof(url->user)) { 783174588Sdes fetch_info("login name in .netrc is too long"); 784109695Sdes url->user[0] = '\0'; 785109695Sdes } 786109695Sdes } else if (strcmp(word, "password") == 0) { 787174588Sdes if ((word = fetch_read_word(f)) == NULL) 788109695Sdes goto ferr; 789109967Sdes if (snprintf(url->pwd, sizeof(url->pwd), 790109960Sjwd "%s", word) > (int)sizeof(url->pwd)) { 791174588Sdes fetch_info("password in .netrc is too long"); 792109695Sdes url->pwd[0] = '\0'; 793109695Sdes } 794109695Sdes } else if (strcmp(word, "account") == 0) { 795174588Sdes if ((word = fetch_read_word(f)) == NULL) 796109695Sdes goto ferr; 797109695Sdes /* XXX not supported! */ 798109695Sdes } else { 799109695Sdes break; 800109695Sdes } 801109695Sdes } 802109695Sdes fclose(f); 803109695Sdes return (0); 804109695Sdes ferr: 805109695Sdes fclose(f); 806109695Sdes return (-1); 807109695Sdes} 808174752Sdes 809174752Sdes/* 810174752Sdes * The no_proxy environment variable specifies a set of domains for 811174752Sdes * which the proxy should not be consulted; the contents is a comma-, 812174752Sdes * or space-separated list of domain names. A single asterisk will 813174752Sdes * override all proxy variables and no transactions will be proxied 814174752Sdes * (for compatability with lynx and curl, see the discussion at 815174752Sdes * <http://curl.haxx.se/mail/archive_pre_oct_99/0009.html>). 816174752Sdes */ 817174752Sdesint 818174752Sdesfetch_no_proxy_match(const char *host) 819174752Sdes{ 820174752Sdes const char *no_proxy, *p, *q; 821174752Sdes size_t h_len, d_len; 822174752Sdes 823174752Sdes if ((no_proxy = getenv("NO_PROXY")) == NULL && 824174752Sdes (no_proxy = getenv("no_proxy")) == NULL) 825174752Sdes return (0); 826174752Sdes 827174752Sdes /* asterisk matches any hostname */ 828174752Sdes if (strcmp(no_proxy, "*") == 0) 829174752Sdes return (1); 830174752Sdes 831174752Sdes h_len = strlen(host); 832174752Sdes p = no_proxy; 833174752Sdes do { 834174752Sdes /* position p at the beginning of a domain suffix */ 835174761Sdes while (*p == ',' || isspace((unsigned char)*p)) 836174752Sdes p++; 837174752Sdes 838174752Sdes /* position q at the first separator character */ 839174752Sdes for (q = p; *q; ++q) 840174761Sdes if (*q == ',' || isspace((unsigned char)*q)) 841174752Sdes break; 842174752Sdes 843174752Sdes d_len = q - p; 844198339Sfabient if (d_len > 0 && h_len >= d_len && 845174752Sdes strncasecmp(host + h_len - d_len, 846174752Sdes p, d_len) == 0) { 847174752Sdes /* domain name matches */ 848174752Sdes return (1); 849174752Sdes } 850174752Sdes 851174752Sdes p = q + 1; 852174752Sdes } while (*q); 853174752Sdes 854174752Sdes return (0); 855174752Sdes} 856