1046 lines
22 KiB
C
1046 lines
22 KiB
C
/* $NetBSD: common.c,v 1.2 2011/06/25 20:27:01 christos Exp $ */
|
|
/*-
|
|
* Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav
|
|
* Copyright (c) 2008, 2010 Joerg Sonnenberger <joerg@NetBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer
|
|
* in this position and unchanged.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD: common.c,v 1.53 2007/12/19 00:26:36 des Exp $
|
|
*/
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#ifndef NETBSD
|
|
#include <nbcompat.h>
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/time.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#if defined(HAVE_INTTYPES_H) || defined(NETBSD)
|
|
#include <inttypes.h>
|
|
#endif
|
|
#ifndef NETBSD
|
|
#include <nbcompat/netdb.h>
|
|
#else
|
|
#include <netdb.h>
|
|
#endif
|
|
#include <pwd.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef MSG_NOSIGNAL
|
|
#include <signal.h>
|
|
#endif
|
|
|
|
#include "fetch.h"
|
|
#include "common.h"
|
|
|
|
/*** Local data **************************************************************/
|
|
|
|
/*
|
|
* Error messages for resolver errors
|
|
*/
|
|
static struct fetcherr netdb_errlist[] = {
|
|
#ifdef EAI_NODATA
|
|
{ EAI_NODATA, FETCH_RESOLV, "Host not found" },
|
|
#endif
|
|
{ EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" },
|
|
{ EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" },
|
|
{ EAI_NONAME, FETCH_RESOLV, "No address record" },
|
|
{ -1, FETCH_UNKNOWN, "Unknown resolver error" }
|
|
};
|
|
|
|
/*** Error-reporting functions ***********************************************/
|
|
|
|
/*
|
|
* Map error code to string
|
|
*/
|
|
static struct fetcherr *
|
|
fetch_finderr(struct fetcherr *p, int e)
|
|
{
|
|
while (p->num != -1 && p->num != e)
|
|
p++;
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* Set error code
|
|
*/
|
|
void
|
|
fetch_seterr(struct fetcherr *p, int e)
|
|
{
|
|
p = fetch_finderr(p, e);
|
|
fetchLastErrCode = p->cat;
|
|
snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string);
|
|
}
|
|
|
|
/*
|
|
* Set error code according to errno
|
|
*/
|
|
void
|
|
fetch_syserr(void)
|
|
{
|
|
switch (errno) {
|
|
case 0:
|
|
fetchLastErrCode = FETCH_OK;
|
|
break;
|
|
case EPERM:
|
|
case EACCES:
|
|
case EROFS:
|
|
#ifdef EAUTH
|
|
case EAUTH:
|
|
#endif
|
|
#ifdef ENEEDAUTH
|
|
case ENEEDAUTH:
|
|
#endif
|
|
fetchLastErrCode = FETCH_AUTH;
|
|
break;
|
|
case ENOENT:
|
|
case EISDIR: /* XXX */
|
|
fetchLastErrCode = FETCH_UNAVAIL;
|
|
break;
|
|
case ENOMEM:
|
|
fetchLastErrCode = FETCH_MEMORY;
|
|
break;
|
|
case EBUSY:
|
|
case EAGAIN:
|
|
fetchLastErrCode = FETCH_TEMP;
|
|
break;
|
|
case EEXIST:
|
|
fetchLastErrCode = FETCH_EXISTS;
|
|
break;
|
|
case ENOSPC:
|
|
fetchLastErrCode = FETCH_FULL;
|
|
break;
|
|
case EADDRINUSE:
|
|
case EADDRNOTAVAIL:
|
|
case ENETDOWN:
|
|
case ENETUNREACH:
|
|
case ENETRESET:
|
|
case EHOSTUNREACH:
|
|
fetchLastErrCode = FETCH_NETWORK;
|
|
break;
|
|
case ECONNABORTED:
|
|
case ECONNRESET:
|
|
fetchLastErrCode = FETCH_ABORT;
|
|
break;
|
|
case ETIMEDOUT:
|
|
fetchLastErrCode = FETCH_TIMEOUT;
|
|
break;
|
|
case ECONNREFUSED:
|
|
case EHOSTDOWN:
|
|
fetchLastErrCode = FETCH_DOWN;
|
|
break;
|
|
default:
|
|
fetchLastErrCode = FETCH_UNKNOWN;
|
|
}
|
|
snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno));
|
|
}
|
|
|
|
|
|
/*
|
|
* Emit status message
|
|
*/
|
|
void
|
|
fetch_info(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fputc('\n', stderr);
|
|
}
|
|
|
|
|
|
/*** Network-related utility functions ***************************************/
|
|
|
|
/*
|
|
* Return the default port for a scheme
|
|
*/
|
|
int
|
|
fetch_default_port(const char *scheme)
|
|
{
|
|
struct servent *se;
|
|
|
|
if ((se = getservbyname(scheme, "tcp")) != NULL)
|
|
return (ntohs(se->s_port));
|
|
if (strcasecmp(scheme, SCHEME_FTP) == 0)
|
|
return (FTP_DEFAULT_PORT);
|
|
if (strcasecmp(scheme, SCHEME_HTTP) == 0)
|
|
return (HTTP_DEFAULT_PORT);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return the default proxy port for a scheme
|
|
*/
|
|
int
|
|
fetch_default_proxy_port(const char *scheme)
|
|
{
|
|
if (strcasecmp(scheme, SCHEME_FTP) == 0)
|
|
return (FTP_DEFAULT_PROXY_PORT);
|
|
if (strcasecmp(scheme, SCHEME_HTTP) == 0)
|
|
return (HTTP_DEFAULT_PROXY_PORT);
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Create a connection for an existing descriptor.
|
|
*/
|
|
conn_t *
|
|
fetch_reopen(int sd)
|
|
{
|
|
conn_t *conn;
|
|
|
|
/* allocate and fill connection structure */
|
|
if ((conn = calloc(1, sizeof(*conn))) == NULL)
|
|
return (NULL);
|
|
conn->ftp_home = NULL;
|
|
conn->cache_url = NULL;
|
|
conn->next_buf = NULL;
|
|
conn->next_len = 0;
|
|
conn->sd = sd;
|
|
return (conn);
|
|
}
|
|
|
|
|
|
/*
|
|
* Bind a socket to a specific local address
|
|
*/
|
|
int
|
|
fetch_bind(int sd, int af, const char *addr)
|
|
{
|
|
struct addrinfo hints, *res, *res0;
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = af;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
if (getaddrinfo(addr, NULL, &hints, &res0))
|
|
return (-1);
|
|
for (res = res0; res; res = res->ai_next) {
|
|
if (bind(sd, res->ai_addr, res->ai_addrlen) == 0)
|
|
return (0);
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Establish a TCP connection to the specified port on the specified host.
|
|
*/
|
|
conn_t *
|
|
fetch_connect(struct url *url, int af, int verbose)
|
|
{
|
|
conn_t *conn;
|
|
char pbuf[10];
|
|
const char *bindaddr;
|
|
struct addrinfo hints, *res, *res0;
|
|
int sd, error;
|
|
|
|
if (verbose)
|
|
fetch_info("looking up %s", url->host);
|
|
|
|
/* look up host name and set up socket address structure */
|
|
snprintf(pbuf, sizeof(pbuf), "%d", url->port);
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = af;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
if ((error = getaddrinfo(url->host, pbuf, &hints, &res0)) != 0) {
|
|
netdb_seterr(error);
|
|
return (NULL);
|
|
}
|
|
bindaddr = getenv("FETCH_BIND_ADDRESS");
|
|
|
|
if (verbose)
|
|
fetch_info("connecting to %s:%d", url->host, url->port);
|
|
|
|
/* try to connect */
|
|
for (sd = -1, res = res0; res; sd = -1, res = res->ai_next) {
|
|
if ((sd = socket(res->ai_family, res->ai_socktype,
|
|
res->ai_protocol)) == -1)
|
|
continue;
|
|
if (bindaddr != NULL && *bindaddr != '\0' &&
|
|
fetch_bind(sd, res->ai_family, bindaddr) != 0) {
|
|
fetch_info("failed to bind to '%s'", bindaddr);
|
|
close(sd);
|
|
continue;
|
|
}
|
|
if (connect(sd, res->ai_addr, res->ai_addrlen) == 0)
|
|
break;
|
|
close(sd);
|
|
}
|
|
freeaddrinfo(res0);
|
|
if (sd == -1) {
|
|
fetch_syserr();
|
|
return (NULL);
|
|
}
|
|
|
|
if ((conn = fetch_reopen(sd)) == NULL) {
|
|
fetch_syserr();
|
|
close(sd);
|
|
}
|
|
conn->cache_url = fetchCopyURL(url);
|
|
conn->cache_af = af;
|
|
return (conn);
|
|
}
|
|
|
|
static conn_t *connection_cache;
|
|
static int cache_global_limit = 0;
|
|
static int cache_per_host_limit = 0;
|
|
|
|
/*
|
|
* Initialise cache with the given limits.
|
|
*/
|
|
void
|
|
fetchConnectionCacheInit(int global_limit, int per_host_limit)
|
|
{
|
|
|
|
if (global_limit < 0)
|
|
cache_global_limit = INT_MAX;
|
|
else if (per_host_limit > global_limit)
|
|
cache_global_limit = per_host_limit;
|
|
else
|
|
cache_global_limit = global_limit;
|
|
if (per_host_limit < 0)
|
|
cache_per_host_limit = INT_MAX;
|
|
else
|
|
cache_per_host_limit = per_host_limit;
|
|
}
|
|
|
|
/*
|
|
* Flush cache and free all associated resources.
|
|
*/
|
|
void
|
|
fetchConnectionCacheClose(void)
|
|
{
|
|
conn_t *conn;
|
|
|
|
while ((conn = connection_cache) != NULL) {
|
|
connection_cache = conn->next_cached;
|
|
(*conn->cache_close)(conn);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check connection cache for an existing entry matching
|
|
* protocol/host/port/user/password/family.
|
|
*/
|
|
conn_t *
|
|
fetch_cache_get(const struct url *url, int af)
|
|
{
|
|
conn_t *conn, *last_conn = NULL;
|
|
|
|
for (conn = connection_cache; conn; conn = conn->next_cached) {
|
|
if (conn->cache_url->port == url->port &&
|
|
strcmp(conn->cache_url->scheme, url->scheme) == 0 &&
|
|
strcmp(conn->cache_url->host, url->host) == 0 &&
|
|
strcmp(conn->cache_url->user, url->user) == 0 &&
|
|
strcmp(conn->cache_url->pwd, url->pwd) == 0 &&
|
|
(conn->cache_af == AF_UNSPEC || af == AF_UNSPEC ||
|
|
conn->cache_af == af)) {
|
|
if (last_conn != NULL)
|
|
last_conn->next_cached = conn->next_cached;
|
|
else
|
|
connection_cache = conn->next_cached;
|
|
return conn;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Put the connection back into the cache for reuse.
|
|
* If the connection is freed due to LRU or if the cache
|
|
* is explicitly closed, the given callback is called.
|
|
*/
|
|
void
|
|
fetch_cache_put(conn_t *conn, int (*closecb)(conn_t *))
|
|
{
|
|
conn_t *iter, *last;
|
|
int global_count, host_count;
|
|
|
|
if (conn->cache_url == NULL || cache_global_limit == 0) {
|
|
(*closecb)(conn);
|
|
return;
|
|
}
|
|
|
|
global_count = host_count = 0;
|
|
last = NULL;
|
|
for (iter = connection_cache; iter;
|
|
last = iter, iter = iter->next_cached) {
|
|
++global_count;
|
|
if (strcmp(conn->cache_url->host, iter->cache_url->host) == 0)
|
|
++host_count;
|
|
if (global_count < cache_global_limit &&
|
|
host_count < cache_per_host_limit)
|
|
continue;
|
|
--global_count;
|
|
if (last != NULL)
|
|
last->next_cached = iter->next_cached;
|
|
else
|
|
connection_cache = iter->next_cached;
|
|
(*iter->cache_close)(iter);
|
|
}
|
|
|
|
conn->cache_close = closecb;
|
|
conn->next_cached = connection_cache;
|
|
connection_cache = conn;
|
|
}
|
|
|
|
/*
|
|
* Enable SSL on a connection.
|
|
*/
|
|
int
|
|
fetch_ssl(conn_t *conn, int verbose)
|
|
{
|
|
|
|
#ifdef WITH_SSL
|
|
/* Init the SSL library and context */
|
|
if (!SSL_library_init()){
|
|
fprintf(stderr, "SSL library init failed\n");
|
|
return (-1);
|
|
}
|
|
|
|
SSL_load_error_strings();
|
|
|
|
conn->ssl_meth = SSLv23_client_method();
|
|
conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth);
|
|
SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY);
|
|
|
|
conn->ssl = SSL_new(conn->ssl_ctx);
|
|
if (conn->ssl == NULL){
|
|
fprintf(stderr, "SSL context creation failed\n");
|
|
return (-1);
|
|
}
|
|
SSL_set_fd(conn->ssl, conn->sd);
|
|
if (SSL_connect(conn->ssl) == -1){
|
|
ERR_print_errors_fp(stderr);
|
|
return (-1);
|
|
}
|
|
|
|
if (verbose) {
|
|
X509_NAME *name;
|
|
char *str;
|
|
|
|
fprintf(stderr, "SSL connection established using %s\n",
|
|
SSL_get_cipher(conn->ssl));
|
|
conn->ssl_cert = SSL_get_peer_certificate(conn->ssl);
|
|
name = X509_get_subject_name(conn->ssl_cert);
|
|
str = X509_NAME_oneline(name, 0, 0);
|
|
printf("Certificate subject: %s\n", str);
|
|
free(str);
|
|
name = X509_get_issuer_name(conn->ssl_cert);
|
|
str = X509_NAME_oneline(name, 0, 0);
|
|
printf("Certificate issuer: %s\n", str);
|
|
free(str);
|
|
}
|
|
|
|
return (0);
|
|
#else
|
|
(void)conn;
|
|
(void)verbose;
|
|
fprintf(stderr, "SSL support disabled\n");
|
|
return (-1);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Read a character from a connection w/ timeout
|
|
*/
|
|
ssize_t
|
|
fetch_read(conn_t *conn, char *buf, size_t len)
|
|
{
|
|
struct timeval now, timeout, waittv;
|
|
fd_set readfds;
|
|
ssize_t rlen;
|
|
int r;
|
|
|
|
if (len == 0)
|
|
return 0;
|
|
|
|
if (conn->next_len != 0) {
|
|
if (conn->next_len < len)
|
|
len = conn->next_len;
|
|
memmove(buf, conn->next_buf, len);
|
|
conn->next_len -= len;
|
|
conn->next_buf += len;
|
|
return len;
|
|
}
|
|
|
|
if (fetchTimeout) {
|
|
FD_ZERO(&readfds);
|
|
gettimeofday(&timeout, NULL);
|
|
timeout.tv_sec += fetchTimeout;
|
|
}
|
|
|
|
for (;;) {
|
|
while (fetchTimeout && !FD_ISSET(conn->sd, &readfds)) {
|
|
FD_SET(conn->sd, &readfds);
|
|
gettimeofday(&now, NULL);
|
|
waittv.tv_sec = timeout.tv_sec - now.tv_sec;
|
|
waittv.tv_usec = timeout.tv_usec - now.tv_usec;
|
|
if (waittv.tv_usec < 0) {
|
|
waittv.tv_usec += 1000000;
|
|
waittv.tv_sec--;
|
|
}
|
|
if (waittv.tv_sec < 0) {
|
|
errno = ETIMEDOUT;
|
|
fetch_syserr();
|
|
return (-1);
|
|
}
|
|
errno = 0;
|
|
r = select(conn->sd + 1, &readfds, NULL, NULL, &waittv);
|
|
if (r == -1) {
|
|
if (errno == EINTR && fetchRestartCalls)
|
|
continue;
|
|
fetch_syserr();
|
|
return (-1);
|
|
}
|
|
}
|
|
#ifdef WITH_SSL
|
|
if (conn->ssl != NULL)
|
|
rlen = SSL_read(conn->ssl, buf, (int)len);
|
|
else
|
|
#endif
|
|
rlen = read(conn->sd, buf, len);
|
|
if (rlen >= 0)
|
|
break;
|
|
|
|
if (errno != EINTR || !fetchRestartCalls)
|
|
return (-1);
|
|
}
|
|
return (rlen);
|
|
}
|
|
|
|
|
|
/*
|
|
* Read a line of text from a connection w/ timeout
|
|
*/
|
|
#define MIN_BUF_SIZE 1024
|
|
|
|
int
|
|
fetch_getln(conn_t *conn)
|
|
{
|
|
char *tmp, *next;
|
|
size_t tmpsize;
|
|
ssize_t len;
|
|
|
|
if (conn->buf == NULL) {
|
|
if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) {
|
|
errno = ENOMEM;
|
|
return (-1);
|
|
}
|
|
conn->bufsize = MIN_BUF_SIZE;
|
|
}
|
|
|
|
conn->buflen = 0;
|
|
next = NULL;
|
|
|
|
do {
|
|
/*
|
|
* conn->bufsize != conn->buflen at this point,
|
|
* so the buffer can be NUL-terminated below for
|
|
* the case of len == 0.
|
|
*/
|
|
len = fetch_read(conn, conn->buf + conn->buflen,
|
|
conn->bufsize - conn->buflen);
|
|
if (len == -1)
|
|
return (-1);
|
|
if (len == 0)
|
|
break;
|
|
next = memchr(conn->buf + conn->buflen, '\n', (size_t)len);
|
|
conn->buflen += len;
|
|
if (conn->buflen == conn->bufsize && next == NULL) {
|
|
tmp = conn->buf;
|
|
tmpsize = conn->bufsize * 2;
|
|
if (tmpsize < conn->bufsize) {
|
|
errno = ENOMEM;
|
|
return (-1);
|
|
}
|
|
if ((tmp = realloc(tmp, tmpsize)) == NULL) {
|
|
errno = ENOMEM;
|
|
return (-1);
|
|
}
|
|
conn->buf = tmp;
|
|
conn->bufsize = tmpsize;
|
|
}
|
|
} while (next == NULL);
|
|
|
|
if (next != NULL) {
|
|
*next = '\0';
|
|
conn->next_buf = next + 1;
|
|
conn->next_len = conn->buflen - (conn->next_buf - conn->buf);
|
|
conn->buflen = next - conn->buf;
|
|
} else {
|
|
conn->buf[conn->buflen] = '\0';
|
|
conn->next_len = 0;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Write a vector to a connection w/ timeout
|
|
* Note: can modify the iovec.
|
|
*/
|
|
ssize_t
|
|
fetch_write(conn_t *conn, const void *buf, size_t len)
|
|
{
|
|
struct timeval now, timeout, waittv;
|
|
fd_set writefds;
|
|
ssize_t wlen, total;
|
|
int r;
|
|
#ifndef MSG_NOSIGNAL
|
|
static int killed_sigpipe;
|
|
#endif
|
|
|
|
#ifndef MSG_NOSIGNAL
|
|
if (!killed_sigpipe) {
|
|
signal(SIGPIPE, SIG_IGN);
|
|
killed_sigpipe = 1;
|
|
}
|
|
#endif
|
|
|
|
|
|
if (fetchTimeout) {
|
|
FD_ZERO(&writefds);
|
|
gettimeofday(&timeout, NULL);
|
|
timeout.tv_sec += fetchTimeout;
|
|
}
|
|
|
|
total = 0;
|
|
while (len) {
|
|
while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) {
|
|
FD_SET(conn->sd, &writefds);
|
|
gettimeofday(&now, NULL);
|
|
waittv.tv_sec = timeout.tv_sec - now.tv_sec;
|
|
waittv.tv_usec = timeout.tv_usec - now.tv_usec;
|
|
if (waittv.tv_usec < 0) {
|
|
waittv.tv_usec += 1000000;
|
|
waittv.tv_sec--;
|
|
}
|
|
if (waittv.tv_sec < 0) {
|
|
errno = ETIMEDOUT;
|
|
fetch_syserr();
|
|
return (-1);
|
|
}
|
|
errno = 0;
|
|
r = select(conn->sd + 1, NULL, &writefds, NULL, &waittv);
|
|
if (r == -1) {
|
|
if (errno == EINTR && fetchRestartCalls)
|
|
continue;
|
|
return (-1);
|
|
}
|
|
}
|
|
errno = 0;
|
|
#ifdef WITH_SSL
|
|
if (conn->ssl != NULL)
|
|
wlen = SSL_write(conn->ssl, buf, (int)len);
|
|
else
|
|
#endif
|
|
#ifndef MSG_NOSIGNAL
|
|
wlen = send(conn->sd, buf, len, 0);
|
|
#else
|
|
wlen = send(conn->sd, buf, len, MSG_NOSIGNAL);
|
|
#endif
|
|
if (wlen == 0) {
|
|
/* we consider a short write a failure */
|
|
errno = EPIPE;
|
|
fetch_syserr();
|
|
return (-1);
|
|
}
|
|
if (wlen < 0) {
|
|
if (errno == EINTR && fetchRestartCalls)
|
|
continue;
|
|
return (-1);
|
|
}
|
|
total += wlen;
|
|
buf = (const char *)buf + wlen;
|
|
len -= wlen;
|
|
}
|
|
return (total);
|
|
}
|
|
|
|
|
|
/*
|
|
* Close connection
|
|
*/
|
|
int
|
|
fetch_close(conn_t *conn)
|
|
{
|
|
int ret;
|
|
|
|
ret = close(conn->sd);
|
|
if (conn->cache_url)
|
|
fetchFreeURL(conn->cache_url);
|
|
free(conn->ftp_home);
|
|
free(conn->buf);
|
|
free(conn);
|
|
return (ret);
|
|
}
|
|
|
|
|
|
/*** Directory-related utility functions *************************************/
|
|
|
|
int
|
|
fetch_add_entry(struct url_list *ue, struct url *base, const char *name,
|
|
int pre_quoted)
|
|
{
|
|
struct url *tmp;
|
|
char *tmp_name;
|
|
size_t base_doc_len, name_len, i;
|
|
unsigned char c;
|
|
|
|
if (strchr(name, '/') != NULL ||
|
|
strcmp(name, "..") == 0 ||
|
|
strcmp(name, ".") == 0)
|
|
return 0;
|
|
|
|
if (strcmp(base->doc, "/") == 0)
|
|
base_doc_len = 0;
|
|
else
|
|
base_doc_len = strlen(base->doc);
|
|
|
|
name_len = 1;
|
|
for (i = 0; name[i] != '\0'; ++i) {
|
|
if ((!pre_quoted && name[i] == '%') ||
|
|
!fetch_urlpath_safe(name[i]))
|
|
name_len += 3;
|
|
else
|
|
++name_len;
|
|
}
|
|
|
|
tmp_name = malloc( base_doc_len + name_len + 1);
|
|
if (tmp_name == NULL) {
|
|
errno = ENOMEM;
|
|
fetch_syserr();
|
|
return (-1);
|
|
}
|
|
|
|
if (ue->length + 1 >= ue->alloc_size) {
|
|
tmp = realloc(ue->urls, (ue->alloc_size * 2 + 1) * sizeof(*tmp));
|
|
if (tmp == NULL) {
|
|
free(tmp_name);
|
|
errno = ENOMEM;
|
|
fetch_syserr();
|
|
return (-1);
|
|
}
|
|
ue->alloc_size = ue->alloc_size * 2 + 1;
|
|
ue->urls = tmp;
|
|
}
|
|
|
|
tmp = ue->urls + ue->length;
|
|
strcpy(tmp->scheme, base->scheme);
|
|
strcpy(tmp->user, base->user);
|
|
strcpy(tmp->pwd, base->pwd);
|
|
strcpy(tmp->host, base->host);
|
|
tmp->port = base->port;
|
|
tmp->doc = tmp_name;
|
|
memcpy(tmp->doc, base->doc, base_doc_len);
|
|
tmp->doc[base_doc_len] = '/';
|
|
|
|
for (i = base_doc_len + 1; *name != '\0'; ++name) {
|
|
if ((!pre_quoted && *name == '%') ||
|
|
!fetch_urlpath_safe(*name)) {
|
|
tmp->doc[i++] = '%';
|
|
c = (unsigned char)*name / 16;
|
|
if (c < 10)
|
|
tmp->doc[i++] = '0' + c;
|
|
else
|
|
tmp->doc[i++] = 'a' - 10 + c;
|
|
c = (unsigned char)*name % 16;
|
|
if (c < 10)
|
|
tmp->doc[i++] = '0' + c;
|
|
else
|
|
tmp->doc[i++] = 'a' - 10 + c;
|
|
} else {
|
|
tmp->doc[i++] = *name;
|
|
}
|
|
}
|
|
tmp->doc[i] = '\0';
|
|
|
|
tmp->offset = 0;
|
|
tmp->length = 0;
|
|
tmp->last_modified = -1;
|
|
|
|
++ue->length;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
fetchInitURLList(struct url_list *ue)
|
|
{
|
|
ue->length = ue->alloc_size = 0;
|
|
ue->urls = NULL;
|
|
}
|
|
|
|
int
|
|
fetchAppendURLList(struct url_list *dst, const struct url_list *src)
|
|
{
|
|
size_t i, j, len;
|
|
|
|
len = dst->length + src->length;
|
|
if (len > dst->alloc_size) {
|
|
struct url *tmp;
|
|
|
|
tmp = realloc(dst->urls, len * sizeof(*tmp));
|
|
if (tmp == NULL) {
|
|
errno = ENOMEM;
|
|
fetch_syserr();
|
|
return (-1);
|
|
}
|
|
dst->alloc_size = len;
|
|
dst->urls = tmp;
|
|
}
|
|
|
|
for (i = 0, j = dst->length; i < src->length; ++i, ++j) {
|
|
dst->urls[j] = src->urls[i];
|
|
dst->urls[j].doc = strdup(src->urls[i].doc);
|
|
if (dst->urls[j].doc == NULL) {
|
|
while (i-- > 0)
|
|
free(dst->urls[j].doc);
|
|
fetch_syserr();
|
|
return -1;
|
|
}
|
|
}
|
|
dst->length = len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
fetchFreeURLList(struct url_list *ue)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < ue->length; ++i)
|
|
free(ue->urls[i].doc);
|
|
free(ue->urls);
|
|
ue->length = ue->alloc_size = 0;
|
|
}
|
|
|
|
|
|
/*** Authentication-related utility functions ********************************/
|
|
|
|
static const char *
|
|
fetch_read_word(FILE *f)
|
|
{
|
|
static char word[1024];
|
|
|
|
if (fscanf(f, " %1023s ", word) != 1)
|
|
return (NULL);
|
|
return (word);
|
|
}
|
|
|
|
/*
|
|
* Get authentication data for a URL from .netrc
|
|
*/
|
|
int
|
|
fetch_netrc_auth(struct url *url)
|
|
{
|
|
char fn[PATH_MAX];
|
|
const char *word;
|
|
char *p;
|
|
FILE *f;
|
|
|
|
if ((p = getenv("NETRC")) != NULL) {
|
|
if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) {
|
|
fetch_info("$NETRC specifies a file name "
|
|
"longer than PATH_MAX");
|
|
return (-1);
|
|
}
|
|
} else {
|
|
if ((p = getenv("HOME")) != NULL) {
|
|
struct passwd *pwd;
|
|
|
|
if ((pwd = getpwuid(getuid())) == NULL ||
|
|
(p = pwd->pw_dir) == NULL)
|
|
return (-1);
|
|
}
|
|
if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn))
|
|
return (-1);
|
|
}
|
|
|
|
if ((f = fopen(fn, "r")) == NULL)
|
|
return (-1);
|
|
while ((word = fetch_read_word(f)) != NULL) {
|
|
if (strcmp(word, "default") == 0)
|
|
break;
|
|
if (strcmp(word, "machine") == 0 &&
|
|
(word = fetch_read_word(f)) != NULL &&
|
|
strcasecmp(word, url->host) == 0) {
|
|
break;
|
|
}
|
|
}
|
|
if (word == NULL)
|
|
goto ferr;
|
|
while ((word = fetch_read_word(f)) != NULL) {
|
|
if (strcmp(word, "login") == 0) {
|
|
if ((word = fetch_read_word(f)) == NULL)
|
|
goto ferr;
|
|
if (snprintf(url->user, sizeof(url->user),
|
|
"%s", word) > (int)sizeof(url->user)) {
|
|
fetch_info("login name in .netrc is too long");
|
|
url->user[0] = '\0';
|
|
}
|
|
} else if (strcmp(word, "password") == 0) {
|
|
if ((word = fetch_read_word(f)) == NULL)
|
|
goto ferr;
|
|
if (snprintf(url->pwd, sizeof(url->pwd),
|
|
"%s", word) > (int)sizeof(url->pwd)) {
|
|
fetch_info("password in .netrc is too long");
|
|
url->pwd[0] = '\0';
|
|
}
|
|
} else if (strcmp(word, "account") == 0) {
|
|
if ((word = fetch_read_word(f)) == NULL)
|
|
goto ferr;
|
|
/* XXX not supported! */
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
fclose(f);
|
|
return (0);
|
|
ferr:
|
|
fclose(f);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* The no_proxy environment variable specifies a set of domains for
|
|
* which the proxy should not be consulted; the contents is a comma-,
|
|
* or space-separated list of domain names. A single asterisk will
|
|
* override all proxy variables and no transactions will be proxied
|
|
* (for compatability with lynx and curl, see the discussion at
|
|
* <http://curl.haxx.se/mail/archive_pre_oct_99/0009.html>).
|
|
*/
|
|
int
|
|
fetch_no_proxy_match(const char *host)
|
|
{
|
|
const char *no_proxy, *p, *q;
|
|
size_t h_len, d_len;
|
|
|
|
if ((no_proxy = getenv("NO_PROXY")) == NULL &&
|
|
(no_proxy = getenv("no_proxy")) == NULL)
|
|
return (0);
|
|
|
|
/* asterisk matches any hostname */
|
|
if (strcmp(no_proxy, "*") == 0)
|
|
return (1);
|
|
|
|
h_len = strlen(host);
|
|
p = no_proxy;
|
|
do {
|
|
/* position p at the beginning of a domain suffix */
|
|
while (*p == ',' || isspace((unsigned char)*p))
|
|
p++;
|
|
|
|
/* position q at the first separator character */
|
|
for (q = p; *q; ++q)
|
|
if (*q == ',' || isspace((unsigned char)*q))
|
|
break;
|
|
|
|
d_len = q - p;
|
|
if (d_len > 0 && h_len > d_len &&
|
|
strncasecmp(host + h_len - d_len,
|
|
p, d_len) == 0) {
|
|
/* domain name matches */
|
|
return (1);
|
|
}
|
|
|
|
p = q + 1;
|
|
} while (*q);
|
|
|
|
return (0);
|
|
}
|
|
|
|
struct fetchIO {
|
|
void *io_cookie;
|
|
ssize_t (*io_read)(void *, void *, size_t);
|
|
ssize_t (*io_write)(void *, const void *, size_t);
|
|
void (*io_close)(void *);
|
|
};
|
|
|
|
void
|
|
fetchIO_close(fetchIO *f)
|
|
{
|
|
if (f->io_close != NULL)
|
|
(*f->io_close)(f->io_cookie);
|
|
|
|
free(f);
|
|
}
|
|
|
|
fetchIO *
|
|
fetchIO_unopen(void *io_cookie, ssize_t (*io_read)(void *, void *, size_t),
|
|
ssize_t (*io_write)(void *, const void *, size_t),
|
|
void (*io_close)(void *))
|
|
{
|
|
fetchIO *f;
|
|
|
|
f = malloc(sizeof(*f));
|
|
if (f == NULL)
|
|
return f;
|
|
|
|
f->io_cookie = io_cookie;
|
|
f->io_read = io_read;
|
|
f->io_write = io_write;
|
|
f->io_close = io_close;
|
|
|
|
return f;
|
|
}
|
|
|
|
ssize_t
|
|
fetchIO_read(fetchIO *f, void *buf, size_t len)
|
|
{
|
|
if (f->io_read == NULL)
|
|
return EBADF;
|
|
return (*f->io_read)(f->io_cookie, buf, len);
|
|
}
|
|
|
|
ssize_t
|
|
fetchIO_write(fetchIO *f, const void *buf, size_t len)
|
|
{
|
|
if (f->io_read == NULL)
|
|
return EBADF;
|
|
return (*f->io_write)(f->io_cookie, buf, len);
|
|
}
|