common.c revision 111816
140939Sdes/*- 240939Sdes * Copyright (c) 1998 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 111816 2003-03-03 12:35:03Z des $"); 3184203Sdillon 3241862Sdes#include <sys/param.h> 3340939Sdes#include <sys/socket.h> 3455557Sdes#include <sys/time.h> 3562981Sdes#include <sys/uio.h> 3640939Sdes#include <netinet/in.h> 3740939Sdes 3840939Sdes#include <errno.h> 3940939Sdes#include <netdb.h> 40109695Sdes#include <pwd.h> 4160924Sdes#include <stdarg.h> 4241862Sdes#include <stdlib.h> 4341862Sdes#include <stdio.h> 4440939Sdes#include <string.h> 4540939Sdes#include <unistd.h> 4640939Sdes 4740939Sdes#include "fetch.h" 4840939Sdes#include "common.h" 4940939Sdes 5040975Sdes 5140939Sdes/*** Local data **************************************************************/ 5240939Sdes 5340939Sdes/* 5440939Sdes * Error messages for resolver errors 5540939Sdes */ 5640939Sdesstatic struct fetcherr _netdb_errlist[] = { 5790267Sdes { EAI_NODATA, FETCH_RESOLV, "Host not found" }, 5890267Sdes { EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" }, 5990267Sdes { EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" }, 6090267Sdes { EAI_NONAME, FETCH_RESOLV, "No address record" }, 6190267Sdes { -1, FETCH_UNKNOWN, "Unknown resolver error" } 6240939Sdes}; 6340939Sdes 6462981Sdes/* End-of-Line */ 6575891Sarchiestatic const char ENDL[2] = "\r\n"; 6640939Sdes 6762981Sdes 6840939Sdes/*** Error-reporting functions ***********************************************/ 6940939Sdes 7040939Sdes/* 7140939Sdes * Map error code to string 7240939Sdes */ 7360924Sdesstatic struct fetcherr * 7440975Sdes_fetch_finderr(struct fetcherr *p, int e) 7540939Sdes{ 7690267Sdes while (p->num != -1 && p->num != e) 7790267Sdes p++; 7890267Sdes return (p); 7940939Sdes} 8040939Sdes 8140939Sdes/* 8240939Sdes * Set error code 8340939Sdes */ 8440939Sdesvoid 8540939Sdes_fetch_seterr(struct fetcherr *p, int e) 8640939Sdes{ 8790267Sdes p = _fetch_finderr(p, e); 8890267Sdes fetchLastErrCode = p->cat; 8990267Sdes snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string); 9040939Sdes} 9140939Sdes 9240939Sdes/* 9340939Sdes * Set error code according to errno 9440939Sdes */ 9540939Sdesvoid 9640939Sdes_fetch_syserr(void) 9740939Sdes{ 9890267Sdes switch (errno) { 9990267Sdes case 0: 10090267Sdes fetchLastErrCode = FETCH_OK; 10190267Sdes break; 10290267Sdes case EPERM: 10390267Sdes case EACCES: 10490267Sdes case EROFS: 10590267Sdes case EAUTH: 10690267Sdes case ENEEDAUTH: 10790267Sdes fetchLastErrCode = FETCH_AUTH; 10890267Sdes break; 10990267Sdes case ENOENT: 11090267Sdes case EISDIR: /* XXX */ 11190267Sdes fetchLastErrCode = FETCH_UNAVAIL; 11290267Sdes break; 11390267Sdes case ENOMEM: 11490267Sdes fetchLastErrCode = FETCH_MEMORY; 11590267Sdes break; 11690267Sdes case EBUSY: 11790267Sdes case EAGAIN: 11890267Sdes fetchLastErrCode = FETCH_TEMP; 11990267Sdes break; 12090267Sdes case EEXIST: 12190267Sdes fetchLastErrCode = FETCH_EXISTS; 12290267Sdes break; 12390267Sdes case ENOSPC: 12490267Sdes fetchLastErrCode = FETCH_FULL; 12590267Sdes break; 12690267Sdes case EADDRINUSE: 12790267Sdes case EADDRNOTAVAIL: 12890267Sdes case ENETDOWN: 12990267Sdes case ENETUNREACH: 13090267Sdes case ENETRESET: 13190267Sdes case EHOSTUNREACH: 13290267Sdes fetchLastErrCode = FETCH_NETWORK; 13390267Sdes break; 13490267Sdes case ECONNABORTED: 13590267Sdes case ECONNRESET: 13690267Sdes fetchLastErrCode = FETCH_ABORT; 13790267Sdes break; 13890267Sdes case ETIMEDOUT: 13990267Sdes fetchLastErrCode = FETCH_TIMEOUT; 14090267Sdes break; 14190267Sdes case ECONNREFUSED: 14290267Sdes case EHOSTDOWN: 14390267Sdes fetchLastErrCode = FETCH_DOWN; 14490267Sdes break; 14590267Sdesdefault: 14690267Sdes fetchLastErrCode = FETCH_UNKNOWN; 14790267Sdes } 14890267Sdes snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno)); 14940939Sdes} 15040939Sdes 15140939Sdes 15241862Sdes/* 15341862Sdes * Emit status message 15441862Sdes */ 15560924Sdesvoid 15675891Sarchie_fetch_info(const char *fmt, ...) 15741862Sdes{ 15890267Sdes va_list ap; 15990267Sdes 16090267Sdes va_start(ap, fmt); 16190267Sdes vfprintf(stderr, fmt, ap); 16290267Sdes va_end(ap); 16390267Sdes fputc('\n', stderr); 16441862Sdes} 16541862Sdes 16641862Sdes 16740939Sdes/*** Network-related utility functions ***************************************/ 16840939Sdes 16940939Sdes/* 17068551Sdes * Return the default port for a scheme 17168551Sdes */ 17268551Sdesint 17375891Sarchie_fetch_default_port(const char *scheme) 17468551Sdes{ 17590267Sdes struct servent *se; 17668551Sdes 17790267Sdes if ((se = getservbyname(scheme, "tcp")) != NULL) 17890267Sdes return (ntohs(se->s_port)); 17990267Sdes if (strcasecmp(scheme, SCHEME_FTP) == 0) 18090267Sdes return (FTP_DEFAULT_PORT); 18190267Sdes if (strcasecmp(scheme, SCHEME_HTTP) == 0) 18290267Sdes return (HTTP_DEFAULT_PORT); 18390267Sdes return (0); 18468551Sdes} 18568551Sdes 18668551Sdes/* 18768551Sdes * Return the default proxy port for a scheme 18868551Sdes */ 18968551Sdesint 19075891Sarchie_fetch_default_proxy_port(const char *scheme) 19168551Sdes{ 19290267Sdes if (strcasecmp(scheme, SCHEME_FTP) == 0) 19390267Sdes return (FTP_DEFAULT_PROXY_PORT); 19490267Sdes if (strcasecmp(scheme, SCHEME_HTTP) == 0) 19590267Sdes return (HTTP_DEFAULT_PROXY_PORT); 19690267Sdes return (0); 19768551Sdes} 19868551Sdes 19998117Sdes 20068551Sdes/* 20197866Sdes * Create a connection for an existing descriptor. 20297866Sdes */ 20397866Sdesconn_t * 20497866Sdes_fetch_reopen(int sd) 20597866Sdes{ 20697866Sdes conn_t *conn; 20797866Sdes 20897866Sdes /* allocate and fill connection structure */ 209109967Sdes if ((conn = calloc(1, sizeof(*conn))) == NULL) 21097866Sdes return (NULL); 21197866Sdes conn->sd = sd; 21298117Sdes ++conn->ref; 21397866Sdes return (conn); 21497866Sdes} 21597866Sdes 21697866Sdes 21797866Sdes/* 21898117Sdes * Bump a connection's reference count. 21998117Sdes */ 22098117Sdesconn_t * 22198117Sdes_fetch_ref(conn_t *conn) 22298117Sdes{ 22398117Sdes 22498117Sdes ++conn->ref; 22598117Sdes return (conn); 22698117Sdes} 22798117Sdes 22898117Sdes 22998117Sdes/* 230111816Sdes * Bind a socket to a specific local address 231111816Sdes */ 232111816Sdesint 233111816Sdes_fetch_bind(int sd, int af, const char *addr) 234111816Sdes{ 235111816Sdes struct addrinfo hints, *res, *res0; 236111816Sdes int err; 237111816Sdes 238111816Sdes memset(&hints, 0, sizeof(hints)); 239111816Sdes hints.ai_family = af; 240111816Sdes hints.ai_socktype = SOCK_STREAM; 241111816Sdes hints.ai_protocol = 0; 242111816Sdes if ((err = getaddrinfo(addr, NULL, &hints, &res0)) != 0) 243111816Sdes return (-1); 244111816Sdes for (res = res0; res; res = res->ai_next) 245111816Sdes if (bind(sd, res->ai_addr, res->ai_addrlen) == 0) 246111816Sdes return (0); 247111816Sdes return (-1); 248111816Sdes} 249111816Sdes 250111816Sdes 251111816Sdes/* 25240939Sdes * Establish a TCP connection to the specified port on the specified host. 25340939Sdes */ 25497856Sdesconn_t * 25575891Sarchie_fetch_connect(const char *host, int port, int af, int verbose) 25640939Sdes{ 25797856Sdes conn_t *conn; 25890267Sdes char pbuf[10]; 259111816Sdes const char *bindaddr; 26090267Sdes struct addrinfo hints, *res, *res0; 26190267Sdes int sd, err; 26240939Sdes 26390267Sdes DEBUG(fprintf(stderr, "---> %s:%d\n", host, port)); 26441862Sdes 26590267Sdes if (verbose) 26690267Sdes _fetch_info("looking up %s", host); 26740939Sdes 26890267Sdes /* look up host name and set up socket address structure */ 26990267Sdes snprintf(pbuf, sizeof(pbuf), "%d", port); 27090267Sdes memset(&hints, 0, sizeof(hints)); 27190267Sdes hints.ai_family = af; 27290267Sdes hints.ai_socktype = SOCK_STREAM; 27390267Sdes hints.ai_protocol = 0; 27490267Sdes if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) { 27590267Sdes _netdb_seterr(err); 27697856Sdes return (NULL); 27790267Sdes } 278111816Sdes bindaddr = getenv("FETCH_BIND_ADDRESS"); 27990267Sdes 28090267Sdes if (verbose) 28190267Sdes _fetch_info("connecting to %s:%d", host, port); 28290267Sdes 28390267Sdes /* try to connect */ 284111816Sdes for (sd = -1, res = res0; res; sd = -1, res = res->ai_next) { 28590267Sdes if ((sd = socket(res->ai_family, res->ai_socktype, 28662981Sdes res->ai_protocol)) == -1) 28790267Sdes continue; 288111816Sdes if (bindaddr != NULL && *bindaddr != '\0' && 289111816Sdes _fetch_bind(sd, res->ai_family, bindaddr) != 0) { 290111816Sdes _fetch_info("failed to bind to '%s'", bindaddr); 291111816Sdes close(sd); 292111816Sdes continue; 293111816Sdes } 294111816Sdes if (connect(sd, res->ai_addr, res->ai_addrlen) == 0) 29590267Sdes break; 29690267Sdes close(sd); 29790267Sdes } 29890267Sdes freeaddrinfo(res0); 29990267Sdes if (sd == -1) { 30090267Sdes _fetch_syserr(); 30197856Sdes return (NULL); 30290267Sdes } 30340939Sdes 304103459Sfenner if ((conn = _fetch_reopen(sd)) == NULL) { 305103459Sfenner _fetch_syserr(); 30697856Sdes close(sd); 307103459Sfenner } 30897856Sdes return (conn); 30940939Sdes} 31041989Sdes 31141989Sdes 31255557Sdes/* 31397868Sdes * Enable SSL on a connection. 31497868Sdes */ 31597868Sdesint 31697868Sdes_fetch_ssl(conn_t *conn, int verbose) 31797868Sdes{ 31897868Sdes 31997891Sdes#ifdef WITH_SSL 32097868Sdes /* Init the SSL library and context */ 32197868Sdes if (!SSL_library_init()){ 32297868Sdes fprintf(stderr, "SSL library init failed\n"); 32397868Sdes return (-1); 32497868Sdes } 32597868Sdes 32697868Sdes SSL_load_error_strings(); 32797868Sdes 32897868Sdes conn->ssl_meth = SSLv23_client_method(); 32997868Sdes conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth); 330108579Sdes SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY); 33197868Sdes 33297868Sdes conn->ssl = SSL_new(conn->ssl_ctx); 33397868Sdes if (conn->ssl == NULL){ 33497868Sdes fprintf(stderr, "SSL context creation failed\n"); 33597868Sdes return (-1); 33697868Sdes } 33797868Sdes SSL_set_fd(conn->ssl, conn->sd); 33897868Sdes if (SSL_connect(conn->ssl) == -1){ 33997868Sdes ERR_print_errors_fp(stderr); 34097868Sdes return (-1); 34197868Sdes } 34297868Sdes 34397868Sdes if (verbose) { 34497868Sdes X509_NAME *name; 34597868Sdes char *str; 34697868Sdes 34797868Sdes fprintf(stderr, "SSL connection established using %s\n", 34897868Sdes SSL_get_cipher(conn->ssl)); 34997868Sdes conn->ssl_cert = SSL_get_peer_certificate(conn->ssl); 35097868Sdes name = X509_get_subject_name(conn->ssl_cert); 35197868Sdes str = X509_NAME_oneline(name, 0, 0); 35297868Sdes printf("Certificate subject: %s\n", str); 35397868Sdes free(str); 35497868Sdes name = X509_get_issuer_name(conn->ssl_cert); 35597868Sdes str = X509_NAME_oneline(name, 0, 0); 35697868Sdes printf("Certificate issuer: %s\n", str); 35797868Sdes free(str); 35897868Sdes } 35997868Sdes 36097868Sdes return (0); 36197891Sdes#else 36297891Sdes (void)conn; 36397891Sdes (void)verbose; 36497891Sdes fprintf(stderr, "SSL support disabled\n"); 36597891Sdes return (-1); 36697891Sdes#endif 36797868Sdes} 36897868Sdes 36998117Sdes 37097868Sdes/* 37197866Sdes * Read a character from a connection w/ timeout 37255557Sdes */ 37397866Sdesssize_t 37497866Sdes_fetch_read(conn_t *conn, char *buf, size_t len) 37555557Sdes{ 37690267Sdes struct timeval now, timeout, wait; 37790267Sdes fd_set readfds; 37897866Sdes ssize_t rlen, total; 37990267Sdes int r; 38090267Sdes 38155557Sdes if (fetchTimeout) { 38297866Sdes FD_ZERO(&readfds); 38390267Sdes gettimeofday(&timeout, NULL); 38490267Sdes timeout.tv_sec += fetchTimeout; 38555557Sdes } 38690267Sdes 38797866Sdes total = 0; 38897866Sdes while (len > 0) { 38997866Sdes while (fetchTimeout && !FD_ISSET(conn->sd, &readfds)) { 39097856Sdes FD_SET(conn->sd, &readfds); 39190267Sdes gettimeofday(&now, NULL); 39290267Sdes wait.tv_sec = timeout.tv_sec - now.tv_sec; 39390267Sdes wait.tv_usec = timeout.tv_usec - now.tv_usec; 39490267Sdes if (wait.tv_usec < 0) { 39590267Sdes wait.tv_usec += 1000000; 39690267Sdes wait.tv_sec--; 39790267Sdes } 398106186Sdes if (wait.tv_sec < 0) { 399106186Sdes errno = ETIMEDOUT; 400106186Sdes _fetch_syserr(); 401106186Sdes return (-1); 402106186Sdes } 40397866Sdes errno = 0; 40497856Sdes r = select(conn->sd + 1, &readfds, NULL, NULL, &wait); 40590267Sdes if (r == -1) { 40690267Sdes if (errno == EINTR && fetchRestartCalls) 40790267Sdes continue; 408106186Sdes _fetch_syserr(); 40990267Sdes return (-1); 41090267Sdes } 41190267Sdes } 41297891Sdes#ifdef WITH_SSL 41397866Sdes if (conn->ssl != NULL) 41497866Sdes rlen = SSL_read(conn->ssl, buf, len); 41597866Sdes else 41697891Sdes#endif 41797866Sdes rlen = read(conn->sd, buf, len); 418106049Sdes if (rlen == 0) 419106049Sdes break; 42097866Sdes if (rlen < 0) { 42190267Sdes if (errno == EINTR && fetchRestartCalls) 42290267Sdes continue; 42390267Sdes return (-1); 42490267Sdes } 42597866Sdes len -= rlen; 42697866Sdes buf += rlen; 42797866Sdes total += rlen; 42897866Sdes } 42997866Sdes return (total); 43097866Sdes} 43197866Sdes 43298117Sdes 43397866Sdes/* 43497866Sdes * Read a line of text from a connection w/ timeout 43597866Sdes */ 43697866Sdes#define MIN_BUF_SIZE 1024 43797866Sdes 43897866Sdesint 43997866Sdes_fetch_getln(conn_t *conn) 44097866Sdes{ 44197866Sdes char *tmp; 44297866Sdes size_t tmpsize; 443106186Sdes ssize_t len; 44497866Sdes char c; 44597866Sdes 44697866Sdes if (conn->buf == NULL) { 44797866Sdes if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) { 44897866Sdes errno = ENOMEM; 44997866Sdes return (-1); 45097866Sdes } 45197866Sdes conn->bufsize = MIN_BUF_SIZE; 45297866Sdes } 45397866Sdes 45497866Sdes conn->buf[0] = '\0'; 45597866Sdes conn->buflen = 0; 45697866Sdes 45797866Sdes do { 458106186Sdes len = _fetch_read(conn, &c, 1); 459106186Sdes if (len == -1) 46097866Sdes return (-1); 461106186Sdes if (len == 0) 462106137Sobrien break; 46397856Sdes conn->buf[conn->buflen++] = c; 46497856Sdes if (conn->buflen == conn->bufsize) { 46597856Sdes tmp = conn->buf; 46697856Sdes tmpsize = conn->bufsize * 2 + 1; 46797856Sdes if ((tmp = realloc(tmp, tmpsize)) == NULL) { 46890267Sdes errno = ENOMEM; 46990267Sdes return (-1); 47090267Sdes } 47197856Sdes conn->buf = tmp; 47297856Sdes conn->bufsize = tmpsize; 47390267Sdes } 47490267Sdes } while (c != '\n'); 47590267Sdes 47697856Sdes conn->buf[conn->buflen] = '\0'; 47797856Sdes DEBUG(fprintf(stderr, "<<< %s", conn->buf)); 47890267Sdes return (0); 47955557Sdes} 48055557Sdes 48155557Sdes 48262981Sdes/* 48397866Sdes * Write to a connection w/ timeout 48462981Sdes */ 48597866Sdesssize_t 48697866Sdes_fetch_write(conn_t *conn, const char *buf, size_t len) 48797866Sdes{ 488106175Simp struct iovec iov; 489106175Simp 490106175Simp iov.iov_base = __DECONST(char *, buf); 491106175Simp iov.iov_len = len; 492106175Simp return _fetch_writev(conn, &iov, 1); 493106175Simp} 494106175Simp 495106175Simp/* 496106175Simp * Write a vector to a connection w/ timeout 497106175Simp * Note: can modify the iovec. 498106175Simp */ 499106175Simpssize_t 500106175Simp_fetch_writev(conn_t *conn, struct iovec *iov, int iovcnt) 501106175Simp{ 50297866Sdes struct timeval now, timeout, wait; 50397866Sdes fd_set writefds; 50497866Sdes ssize_t wlen, total; 50597866Sdes int r; 50697866Sdes 50797866Sdes if (fetchTimeout) { 50897866Sdes FD_ZERO(&writefds); 50997866Sdes gettimeofday(&timeout, NULL); 51097866Sdes timeout.tv_sec += fetchTimeout; 51197866Sdes } 51297866Sdes 513106175Simp total = 0; 514106175Simp while (iovcnt > 0) { 51597866Sdes while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) { 51697866Sdes FD_SET(conn->sd, &writefds); 51797866Sdes gettimeofday(&now, NULL); 51897866Sdes wait.tv_sec = timeout.tv_sec - now.tv_sec; 51997866Sdes wait.tv_usec = timeout.tv_usec - now.tv_usec; 52097866Sdes if (wait.tv_usec < 0) { 52197866Sdes wait.tv_usec += 1000000; 52297866Sdes wait.tv_sec--; 52397866Sdes } 52497866Sdes if (wait.tv_sec < 0) { 52597866Sdes errno = ETIMEDOUT; 526106186Sdes _fetch_syserr(); 52797866Sdes return (-1); 52897866Sdes } 52997866Sdes errno = 0; 53097866Sdes r = select(conn->sd + 1, NULL, &writefds, NULL, &wait); 53197866Sdes if (r == -1) { 53297866Sdes if (errno == EINTR && fetchRestartCalls) 53397866Sdes continue; 53497866Sdes return (-1); 53597866Sdes } 53697866Sdes } 53797866Sdes errno = 0; 53897891Sdes#ifdef WITH_SSL 53997866Sdes if (conn->ssl != NULL) 540106175Simp wlen = SSL_write(conn->ssl, 541106175Simp iov->iov_base, iov->iov_len); 54297866Sdes else 54397891Sdes#endif 544106175Simp wlen = writev(conn->sd, iov, iovcnt); 545106175Simp if (wlen == 0) { 54697866Sdes /* we consider a short write a failure */ 547106175Simp errno = EPIPE; 548106175Simp _fetch_syserr(); 54997866Sdes return (-1); 550106175Simp } 55197866Sdes if (wlen < 0) { 55297866Sdes if (errno == EINTR && fetchRestartCalls) 55397866Sdes continue; 55497866Sdes return (-1); 55597866Sdes } 55697866Sdes total += wlen; 557106175Simp while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) { 558106175Simp wlen -= iov->iov_len; 559106175Simp iov++; 560106175Simp iovcnt--; 561106175Simp } 562106175Simp if (iovcnt > 0) { 563106175Simp iov->iov_len -= wlen; 564106175Simp iov->iov_base = __DECONST(char *, iov->iov_base) + wlen; 565106175Simp } 56697866Sdes } 56797866Sdes return (total); 56897866Sdes} 56997866Sdes 57098117Sdes 57197866Sdes/* 57297866Sdes * Write a line of text to a connection w/ timeout 57397866Sdes */ 57462981Sdesint 57597856Sdes_fetch_putln(conn_t *conn, const char *str, size_t len) 57662981Sdes{ 577106175Simp struct iovec iov[2]; 578106205Sdes int ret; 57998748Sdes 58098748Sdes DEBUG(fprintf(stderr, ">>> %s\n", str)); 581106175Simp iov[0].iov_base = __DECONST(char *, str); 582106175Simp iov[0].iov_len = len; 583106175Simp iov[1].iov_base = __DECONST(char *, ENDL); 584109967Sdes iov[1].iov_len = sizeof(ENDL); 585106205Sdes if (len == 0) 586106205Sdes ret = _fetch_writev(conn, &iov[1], 1); 587106205Sdes else 588106205Sdes ret = _fetch_writev(conn, iov, 2); 589106205Sdes if (ret == -1) 59090267Sdes return (-1); 59190267Sdes return (0); 59262981Sdes} 59362981Sdes 59462981Sdes 59597856Sdes/* 59697856Sdes * Close connection 59797856Sdes */ 59897856Sdesint 59997856Sdes_fetch_close(conn_t *conn) 60097856Sdes{ 60197856Sdes int ret; 60297856Sdes 60398117Sdes if (--conn->ref > 0) 60498117Sdes return (0); 60597856Sdes ret = close(conn->sd); 60697856Sdes free(conn); 60797856Sdes return (ret); 60897856Sdes} 60997856Sdes 61097856Sdes 61141989Sdes/*** Directory-related utility functions *************************************/ 61241989Sdes 61341989Sdesint 61441989Sdes_fetch_add_entry(struct url_ent **p, int *size, int *len, 61590267Sdes const char *name, struct url_stat *us) 61641989Sdes{ 61790267Sdes struct url_ent *tmp; 61841989Sdes 61990267Sdes if (*p == NULL) { 62090268Sdes *size = 0; 62190267Sdes *len = 0; 62241989Sdes } 62341989Sdes 62490267Sdes if (*len >= *size - 1) { 625109967Sdes tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p)); 62690267Sdes if (tmp == NULL) { 62790267Sdes errno = ENOMEM; 62890267Sdes _fetch_syserr(); 62990267Sdes return (-1); 63090267Sdes } 63190268Sdes *size = (*size * 2 + 1); 63290267Sdes *p = tmp; 63390267Sdes } 63441989Sdes 63590267Sdes tmp = *p + *len; 63690267Sdes snprintf(tmp->name, PATH_MAX, "%s", name); 637109967Sdes bcopy(us, &tmp->stat, sizeof(*us)); 63841989Sdes 63990267Sdes (*len)++; 64090267Sdes (++tmp)->name[0] = 0; 64190267Sdes 64290267Sdes return (0); 64341989Sdes} 644109695Sdes 645109695Sdes 646109695Sdes/*** Authentication-related utility functions ********************************/ 647109695Sdes 648109695Sdesstatic const char * 649109695Sdes_fetch_read_word(FILE *f) 650109695Sdes{ 651109695Sdes static char word[1024]; 652109695Sdes 653109695Sdes if (fscanf(f, " %1024s ", word) != 1) 654109695Sdes return (NULL); 655109695Sdes return (word); 656109695Sdes} 657109695Sdes 658109695Sdes/* 659109695Sdes * Get authentication data for a URL from .netrc 660109695Sdes */ 661109695Sdesint 662109695Sdes_fetch_netrc_auth(struct url *url) 663109695Sdes{ 664109695Sdes char fn[PATH_MAX]; 665109695Sdes const char *word; 666109695Sdes char *p; 667109695Sdes FILE *f; 668109695Sdes 669109695Sdes if ((p = getenv("NETRC")) != NULL) { 670109967Sdes if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) { 671109695Sdes _fetch_info("$NETRC specifies a file name " 672109695Sdes "longer than PATH_MAX"); 673109695Sdes return (-1); 674109695Sdes } 675109695Sdes } else { 676109695Sdes if ((p = getenv("HOME")) != NULL) { 677109695Sdes struct passwd *pwd; 678109695Sdes 679109695Sdes if ((pwd = getpwuid(getuid())) == NULL || 680109695Sdes (p = pwd->pw_dir) == NULL) 681109695Sdes return (-1); 682109695Sdes } 683109967Sdes if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn)) 684109695Sdes return (-1); 685109695Sdes } 686109695Sdes 687109695Sdes if ((f = fopen(fn, "r")) == NULL) 688109695Sdes return (-1); 689109695Sdes while ((word = _fetch_read_word(f)) != NULL) { 690109695Sdes if (strcmp(word, "default") == 0) { 691109695Sdes DEBUG(_fetch_info("Using default .netrc settings")); 692109695Sdes break; 693109695Sdes } 694109695Sdes if (strcmp(word, "machine") == 0 && 695109695Sdes (word = _fetch_read_word(f)) != NULL && 696109695Sdes strcasecmp(word, url->host) == 0) { 697109695Sdes DEBUG(_fetch_info("Using .netrc settings for %s", word)); 698109695Sdes break; 699109695Sdes } 700109695Sdes } 701109695Sdes if (word == NULL) 702109695Sdes goto ferr; 703109695Sdes while ((word = _fetch_read_word(f)) != NULL) { 704109695Sdes if (strcmp(word, "login") == 0) { 705109695Sdes if ((word = _fetch_read_word(f)) == NULL) 706109695Sdes goto ferr; 707109967Sdes if (snprintf(url->user, sizeof(url->user), 708109960Sjwd "%s", word) > (int)sizeof(url->user)) { 709109695Sdes _fetch_info("login name in .netrc is too long"); 710109695Sdes url->user[0] = '\0'; 711109695Sdes } 712109695Sdes } else if (strcmp(word, "password") == 0) { 713109695Sdes if ((word = _fetch_read_word(f)) == NULL) 714109695Sdes goto ferr; 715109967Sdes if (snprintf(url->pwd, sizeof(url->pwd), 716109960Sjwd "%s", word) > (int)sizeof(url->pwd)) { 717109695Sdes _fetch_info("password in .netrc is too long"); 718109695Sdes url->pwd[0] = '\0'; 719109695Sdes } 720109695Sdes } else if (strcmp(word, "account") == 0) { 721109695Sdes if ((word = _fetch_read_word(f)) == NULL) 722109695Sdes goto ferr; 723109695Sdes /* XXX not supported! */ 724109695Sdes } else { 725109695Sdes break; 726109695Sdes } 727109695Sdes } 728109695Sdes fclose(f); 729109695Sdes return (0); 730109695Sdes ferr: 731109695Sdes fclose(f); 732109695Sdes return (-1); 733109695Sdes} 734