/* $NetBSD: common.c,v 1.27 2010/06/13 21:38:09 joerg 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

#if !defined(NETBSD) && !defined(__minix)

#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

#if !defined(NETBSD) && !defined(__minix)

#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 "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:

#if defined(ENETRESET)

case ENETRESET:

#endif

case EHOSTUNREACH:

fetchLastErrCode = FETCH_NETWORK;

break;

#if defined(ECONNABORTED)

case ECONNABORTED:

#endif

case ECONNRESET:

fetchLastErrCode = FETCH_ABORT;

break;

case ETIMEDOUT:

fetchLastErrCode = FETCH_TIMEOUT;

break;

case ECONNREFUSED:

#if defined(EHOSTDOWN)

case EHOSTDOWN:

#endif

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);

return (NULL);

}

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, 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', 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, 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);