fd88298755
Found by clang-analyzer. Bug Summary File: lib/fetch/common.c Warning: line 587, column 4 Potential leak of memory pointed to by 'pfd'
2009 lines
45 KiB
C
2009 lines
45 KiB
C
/* $FreeBSD: rev 288217 $ */
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/* $NetBSD: common.c,v 1.29 2014/01/08 20:25:34 joerg Exp $ */
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/*-
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* Copyright (c) 1998-2014 Dag-Erling Smorgrav
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* Copyright (c) 2008, 2010 Joerg Sonnenberger <joerg@NetBSD.org>
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* Copyright (c) 2013 Michael Gmelin <freebsd@grem.de>
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* Copyright (c) 2019 Duncan Overbruck <mail@duncano.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "compat.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <errno.h>
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#if defined(HAVE_INTTYPES_H) || defined(NETBSD)
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#include <inttypes.h>
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#endif
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#include <netdb.h>
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <strings.h>
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#include <poll.h>
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#include <fcntl.h>
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#ifndef MSG_NOSIGNAL
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#include <signal.h>
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#endif
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#ifdef WITH_SSL
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#include <openssl/x509v3.h>
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#endif
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#include <pthread.h>
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#include "fetch.h"
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#include "common.h"
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#ifdef __clang__
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#pragma clang diagnostic ignored "-Wformat-nonliteral"
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#endif
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/*** Local data **************************************************************/
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/*
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* Error messages for resolver errors
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*/
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static struct fetcherr netdb_errlist[] = {
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#ifdef EAI_NODATA
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{ EAI_NODATA, FETCH_RESOLV, "Host not found" },
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#endif
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{ EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" },
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{ EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" },
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{ EAI_NONAME, FETCH_RESOLV, "No address record" },
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{ -1, FETCH_UNKNOWN, "Unknown resolver error" }
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};
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/*** Error-reporting functions ***********************************************/
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/*
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* Map error code to string
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*/
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static struct fetcherr *
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fetch_finderr(struct fetcherr *p, int e)
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{
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while (p->num != -1 && p->num != e)
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p++;
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return (p);
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}
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/*
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* Set error code
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*/
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void
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fetch_seterr(struct fetcherr *p, int e)
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{
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p = fetch_finderr(p, e);
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fetchLastErrCode = p->cat;
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snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string);
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}
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/*
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* Set error code according to errno
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*/
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void
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fetch_syserr(void)
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{
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switch (errno) {
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case 0:
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fetchLastErrCode = FETCH_OK;
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break;
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case EPERM:
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case EACCES:
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case EROFS:
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#ifdef EAUTH
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case EAUTH:
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#endif
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#ifdef ENEEDAUTH
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case ENEEDAUTH:
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#endif
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fetchLastErrCode = FETCH_AUTH;
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break;
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case ENOENT:
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case EISDIR: /* XXX */
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fetchLastErrCode = FETCH_UNAVAIL;
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break;
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case ENOMEM:
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fetchLastErrCode = FETCH_MEMORY;
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break;
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case EBUSY:
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case EAGAIN:
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fetchLastErrCode = FETCH_TEMP;
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break;
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case EEXIST:
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fetchLastErrCode = FETCH_EXISTS;
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break;
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case ENOSPC:
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fetchLastErrCode = FETCH_FULL;
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break;
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case EADDRINUSE:
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case EADDRNOTAVAIL:
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case ENETDOWN:
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case ENETUNREACH:
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case ENETRESET:
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case EHOSTUNREACH:
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fetchLastErrCode = FETCH_NETWORK;
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break;
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case ECONNABORTED:
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case ECONNRESET:
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fetchLastErrCode = FETCH_ABORT;
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break;
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case ETIMEDOUT:
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fetchLastErrCode = FETCH_TIMEOUT;
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break;
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case ECONNREFUSED:
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case EHOSTDOWN:
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fetchLastErrCode = FETCH_DOWN;
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break;
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default:
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fetchLastErrCode = FETCH_UNKNOWN;
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}
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snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno));
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}
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/*
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* Emit status message
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*/
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void
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fetch_info(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fputc('\n', stderr);
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}
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/*** Network-related utility functions ***************************************/
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/*
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* Return the default port for a scheme
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*/
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int
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fetch_default_port(const char *scheme)
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{
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struct servent *se;
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if (strcasecmp(scheme, SCHEME_FTP) == 0)
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return (FTP_DEFAULT_PORT);
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if (strcasecmp(scheme, SCHEME_HTTP) == 0)
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return (HTTP_DEFAULT_PORT);
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if (strcasecmp(scheme, SCHEME_HTTPS) == 0)
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return (HTTPS_DEFAULT_PORT);
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if (strcasecmp(scheme, SCHEME_SOCKS5) == 0)
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return (SOCKS5_DEFAULT_PORT);
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if ((se = getservbyname(scheme, "tcp")) != NULL)
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return (ntohs(se->s_port));
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return (0);
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}
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/*
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* Return the default proxy port for a scheme
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*/
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int
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fetch_default_proxy_port(const char *scheme)
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{
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if (strcasecmp(scheme, SCHEME_FTP) == 0)
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return (FTP_DEFAULT_PROXY_PORT);
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if (strcasecmp(scheme, SCHEME_HTTP) == 0)
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return (HTTP_DEFAULT_PROXY_PORT);
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return (0);
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}
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/*
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* Create a connection for an existing descriptor.
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*/
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conn_t *
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fetch_reopen(int sd)
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{
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conn_t *conn;
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/* allocate and fill connection structure */
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if ((conn = calloc(1, sizeof(*conn))) == NULL)
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return (NULL);
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conn->ftp_home = NULL;
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conn->cache_url = NULL;
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conn->next_buf = NULL;
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conn->next_len = 0;
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conn->sd = sd;
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return (conn);
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}
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/*
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* Bind a socket to a specific local address
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*/
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int
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fetch_bind(int sd, int af, const char *addr)
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{
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struct addrinfo hints, *res, *res0;
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int rv = -1;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = af;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = 0;
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if (getaddrinfo(addr, NULL, &hints, &res0))
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return (-1);
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for (res = res0; res; res = res->ai_next) {
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if (bind(sd, res->ai_addr, res->ai_addrlen) == 0) {
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rv = 0;
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break;
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}
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}
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freeaddrinfo(res0);
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return rv;
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}
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int
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fetch_socks5(conn_t *conn, struct url *url, struct url *socks, int verbose)
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{
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char buf[262];
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uint8_t auth;
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size_t alen;
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ssize_t dlen;
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alen = strlen(url->host);
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if (alen > 255) {
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if (verbose)
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fetch_info("socks5 only supports addresses <= 255 bytes");
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errno = EINVAL;
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return -1;
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}
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auth = (*socks->user != '\0' && *socks->pwd != '\0')
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? SOCKS5_USER_PASS : SOCKS5_NO_AUTH;
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buf[0] = SOCKS5_VERSION;
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buf[1] = 0x01; /* number of auth methods */
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buf[2] = auth;
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if (fetch_write(conn, buf, 3) != 3)
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return -1;
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if (fetch_read(conn, buf, 2) != 2)
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return -1;
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if (buf[0] != SOCKS5_VERSION) {
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if (verbose)
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fetch_info("socks5 version not recognized");
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errno = EINVAL;
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return -1;
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}
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if ((uint8_t)buf[1] == SOCKS5_NO_METHOD) {
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if (verbose)
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fetch_info("no acceptable socks5 authentication method");
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errno = EPERM;
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return -1;
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}
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switch (buf[1]) {
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case SOCKS5_USER_PASS:
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if (verbose)
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fetch_info("authenticate socks5 user '%s'", socks->user);
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buf[0] = SOCKS5_PASS_VERSION;
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buf[1] = strlen(socks->user);
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if (fetch_write(conn, buf, 2) != 2)
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return -1;
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if (fetch_write(conn, socks->user, buf[1]) == -1)
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return -1;
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buf[0] = strlen(socks->pwd);
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if (fetch_write(conn, buf, 1) != 1)
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return -1;
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if (fetch_write(conn, socks->pwd, buf[0]) == -1)
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return -1;
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if (fetch_read(conn, buf, 2) != 2)
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return -1;
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if (buf[0] != SOCKS5_PASS_VERSION) {
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if (verbose)
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fetch_info("socks5 password version not recognized");
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errno = EINVAL;
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return -1;
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}
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if (verbose)
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fetch_info("socks5 authentication response %d", buf[1]);
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if (buf[1] != SOCKS5_AUTH_SUCCESS) {
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if (verbose)
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fetch_info("socks5 authentication failed");
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errno = EPERM;
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return -1;
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}
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break;
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}
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if (verbose)
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fetch_info("connecting socks5 to %s:%d", url->host, url->port);
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/* write request */
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dlen = 0;
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buf[dlen++] = SOCKS5_VERSION;
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buf[dlen++] = SOCKS5_TCP_STREAM;
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buf[dlen++] = 0x00;
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buf[dlen++] = SOCKS5_ATYPE_DOMAIN;
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buf[dlen++] = alen;
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memcpy(&buf[dlen], url->host, alen);
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dlen += alen;
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buf[dlen++] = (url->port >> 0x08);
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buf[dlen++] = (url->port & 0xFF);
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if (fetch_write(conn, buf, dlen) != dlen)
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return -1;
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/* read answer */
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if (fetch_read(conn, buf, 4) != 4)
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return -1;
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if (buf[0] != SOCKS5_VERSION) {
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if (verbose)
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fetch_info("socks5 version not recognized");
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errno = EINVAL;
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return -1;
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}
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/* answer status */
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if (buf[1] != SOCKS5_REPLY_SUCCESS) {
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if (verbose)
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fetch_info("socks5 response status %d", buf[1]);
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switch (buf[1]) {
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case SOCKS5_REPLY_DENY: errno = EACCES; break;
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case SOCKS5_REPLY_NO_NET: errno = ENETUNREACH; break;
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case SOCKS5_REPLY_NO_HOST: errno = EHOSTUNREACH; break;
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case SOCKS5_REPLY_REFUSED: errno = ECONNREFUSED; break;
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case SOCKS5_REPLY_TIMEOUT: errno = ETIMEDOUT; break;
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case SOCKS5_REPLY_CMD_NOTSUP: errno = ENOTSUP; break;
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case SOCKS5_REPLY_ADR_NOTSUP: errno = ENOTSUP; break;
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}
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return -1;
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}
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switch (buf[3]) {
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case SOCKS5_ATYPE_IPV4:
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if (fetch_read(conn, buf, 4) != 4)
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return -1;
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break;
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case SOCKS5_ATYPE_DOMAIN:
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if (fetch_read(conn, buf, 1) != 1 &&
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fetch_read(conn, buf, buf[0]) != buf[0])
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return -1;
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break;
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case SOCKS5_ATYPE_IPV6:
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if (fetch_read(conn, buf, 16) != 16)
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return -1;
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break;
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default:
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return -1;
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}
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// port
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if (fetch_read(conn, buf, 2) != 2)
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return -1;
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return 0;
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}
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/*
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* Happy Eyeballs (RFC8305):
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*
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* Connect to the addresses in res0, alternating between
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* address family, starting with ipv6 and waits `fetchConnDelay`
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* between each connection attempt.
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*
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* If a connection is established within the attempts,
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* use this connection and close all others.
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*
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* If `connect(3)` returns `ENETUNREACH`, don't attempt more
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* connections with the failing address family.
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*
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* If there are no more addresses to attempt, wait for
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* `fetchConnTimeout` and return the first established
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* connection.
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*
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* If no connection was established within the timeouts,
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* close all sockets and return -1 and set errno to
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* `ETIMEDOUT`.
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*/
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static int
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happy_eyeballs_connect(struct addrinfo *res0)
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{
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struct pollfd *pfd;
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struct addrinfo *res;
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const char *bindaddr;
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int optval;
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socklen_t optlen = sizeof(optval);
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int rv = -1;
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int err = 0;
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int timeout = fetchConnDelay;
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unsigned int attempts = 0, waiting = 0;
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unsigned int i, n4, n6, i4, i6, done = 0;
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bindaddr = getenv("FETCH_BIND_ADDRESS");
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for (n4 = n6 = 0, res = res0; res; res = res->ai_next)
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switch (res->ai_family) {
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case AF_INET6: n6++; break;
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case AF_INET: n4++; break;
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}
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if (n4+n6 == 0 || !(pfd = calloc(n4+n6, sizeof (struct pollfd))))
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return -1;
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#ifdef FULL_DEBUG
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fetch_info("got %d A and %d AAAA records", n4, n6);
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#endif
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i4 = i6 = 0;
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if (getenv("FORCE_IPV4"))
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i6 = n6;
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if (getenv("FORCE_IPV6"))
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i4 = n4;
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res = NULL;
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for (;;) {
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int sd = -1;
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int ret;
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unsigned short family = 0;
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#ifdef FULL_DEBUG
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fetch_info("happy eyeballs state: i4=%u n4=%u i6=%u n6=%u"
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" attempts=%u waiting=%u", i4, n4, i6, n6, attempts, waiting);
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#endif
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if (i6+i4 < n6+n4) {
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/* first round when res == NULL, prefer ipv6 */
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if (res == NULL || res->ai_family == AF_INET) {
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/* prefer ipv6 */
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if (i6 < n6)
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family = AF_INET6;
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else if (i4 < n4)
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family = AF_INET;
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} else {
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/* prefer ipv4 */
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if (i4 < n4)
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family = AF_INET;
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else if (i6 < n6)
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family = AF_INET6;
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}
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} else {
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/* no more connections to try */
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#ifdef FULL_DEBUG
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fetch_info("attempted to connect to all addresses, waiting...");
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#endif
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timeout = fetchConnTimeout;
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done = 1;
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goto wait;
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}
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for (i = 0, res = res0; res; res = res->ai_next) {
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if (res->ai_family == family) {
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if (family == AF_INET && i == i4) {
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i4++;
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break;
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}
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if (family == AF_INET6 && i == i6) {
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i6++;
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break;
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}
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i++;
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}
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}
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if (res == NULL)
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goto error;
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if ((sd = socket(res->ai_family, res->ai_socktype | SOCK_NONBLOCK,
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res->ai_protocol)) == -1)
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continue;
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|
|
|
if (bindaddr != NULL && *bindaddr != '\0' &&
|
|
fetch_bind(sd, res->ai_family, bindaddr) != 0) {
|
|
fetch_info("failed to bind to '%s'", bindaddr);
|
|
close(sd);
|
|
continue;
|
|
}
|
|
|
|
#ifdef FULL_DEBUG
|
|
{
|
|
char hbuf[1025];
|
|
if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf), NULL,
|
|
0, NI_NUMERICHOST) == 0)
|
|
fetch_info("connecting to %s", hbuf);
|
|
}
|
|
#endif
|
|
|
|
if (connect(sd, res->ai_addr, res->ai_addrlen) == -1) {
|
|
if (errno == EINPROGRESS) {
|
|
pfd[attempts].fd = sd;
|
|
} else if (errno == ENETUNREACH) {
|
|
close(sd);
|
|
if (family == AF_INET)
|
|
i4 = n4;
|
|
else
|
|
i6 = n6;
|
|
continue;
|
|
} else {
|
|
err = errno;
|
|
rv = -1;
|
|
close(sd);
|
|
break;
|
|
}
|
|
} else {
|
|
/* XXX: does this actually happen? */
|
|
rv = sd;
|
|
break;
|
|
}
|
|
|
|
attempts++;
|
|
waiting++;
|
|
wait:
|
|
if (!attempts) {
|
|
error:
|
|
netdb_seterr(EAI_FAIL);
|
|
free(pfd);
|
|
return -1;
|
|
}
|
|
for (i = 0; i < attempts; i++) {
|
|
pfd[i].revents = pfd[i].events = 0;
|
|
if (pfd[i].fd != -1)
|
|
pfd[i].events = POLLOUT;
|
|
}
|
|
if ((ret = poll(pfd, attempts, timeout ? timeout : -1)) == -1) {
|
|
err = errno;
|
|
rv = -1;
|
|
break;
|
|
} else if (ret > 0) {
|
|
sd = -1;
|
|
for (i = 0; i < attempts; i++) {
|
|
if (pfd[i].revents & POLLHUP) {
|
|
/* connection failed, save errno */
|
|
if ((getsockopt(pfd[i].fd, SOL_SOCKET, SO_ERROR, &optval, &optlen)) == 0)
|
|
err = optval;
|
|
close(pfd[i].fd);
|
|
pfd[i].fd = -1;
|
|
waiting--;
|
|
} else if (pfd[i].revents & POLLOUT) {
|
|
/* connection established */
|
|
err = 0;
|
|
sd = pfd[i].fd;
|
|
break;
|
|
}
|
|
}
|
|
if (sd != -1) {
|
|
rv = sd;
|
|
break;
|
|
}
|
|
} else if (done) {
|
|
err = ETIMEDOUT;
|
|
rv = -1;
|
|
break;
|
|
}
|
|
if (!waiting)
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < attempts; i++)
|
|
if ((rv == -1 || rv != pfd[i].fd) && pfd[i].fd != -1)
|
|
close(pfd[i].fd);
|
|
free(pfd);
|
|
|
|
if (rv != -1) {
|
|
if (fcntl(rv, F_SETFL, fcntl(rv, F_GETFL, 0) & ~O_NONBLOCK) == -1) {
|
|
err = errno;
|
|
close(rv);
|
|
rv = -1;
|
|
}
|
|
}
|
|
if ((errno = err))
|
|
fetch_syserr();
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* 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];
|
|
struct url *socks_url, *connurl;
|
|
const char *socks_proxy;
|
|
struct addrinfo hints, *res0;
|
|
int sd, error;
|
|
|
|
socks_url = NULL;
|
|
socks_proxy = getenv("SOCKS_PROXY");
|
|
if (socks_proxy != NULL && *socks_proxy != '\0') {
|
|
if (!(socks_url = fetchParseURL(socks_proxy)))
|
|
return NULL;
|
|
if (strcasecmp(socks_url->scheme, SCHEME_SOCKS5) != 0) {
|
|
if (verbose)
|
|
fetch_info("SOCKS_PROXY scheme '%s' not supported", socks_url->scheme);
|
|
return NULL;
|
|
}
|
|
if (!socks_url->port)
|
|
socks_url->port = fetch_default_port(socks_url->scheme);
|
|
connurl = socks_url;
|
|
} else {
|
|
connurl = url;
|
|
}
|
|
|
|
if (verbose)
|
|
fetch_info("looking up %s", connurl->host);
|
|
|
|
/* look up host name and set up socket address structure */
|
|
snprintf(pbuf, sizeof(pbuf), "%d", connurl->port);
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = af;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
if ((error = getaddrinfo(connurl->host, pbuf, &hints, &res0)) != 0) {
|
|
netdb_seterr(error);
|
|
return (NULL);
|
|
}
|
|
|
|
if (verbose)
|
|
fetch_info("connecting to %s:%d", connurl->host, connurl->port);
|
|
|
|
sd = happy_eyeballs_connect(res0);
|
|
freeaddrinfo(res0);
|
|
if (sd == -1)
|
|
return (NULL);
|
|
|
|
if ((conn = fetch_reopen(sd)) == NULL) {
|
|
fetch_syserr();
|
|
close(sd);
|
|
return NULL;
|
|
}
|
|
if (socks_url) {
|
|
if (strcasecmp(socks_url->scheme, SCHEME_SOCKS5) == 0) {
|
|
if (fetch_socks5(conn, url, socks_url, verbose) != 0) {
|
|
fetch_syserr();
|
|
close(sd);
|
|
free(conn);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
conn->cache_url = fetchCopyURL(url);
|
|
conn->cache_af = af;
|
|
return (conn);
|
|
}
|
|
|
|
static pthread_mutex_t cache_mtx = PTHREAD_MUTEX_INITIALIZER;
|
|
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;
|
|
|
|
pthread_mutex_lock(&cache_mtx);
|
|
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;
|
|
|
|
pthread_mutex_unlock(&cache_mtx);
|
|
return conn;
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&cache_mtx);
|
|
|
|
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;
|
|
}
|
|
|
|
pthread_mutex_lock(&cache_mtx);
|
|
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;
|
|
pthread_mutex_unlock(&cache_mtx);
|
|
}
|
|
|
|
|
|
#ifdef WITH_SSL
|
|
|
|
#ifndef HAVE_STRNSTR
|
|
/*
|
|
* Find the first occurrence of find in s, where the search is limited to the
|
|
* first slen characters of s.
|
|
*/
|
|
static char *
|
|
strnstr(const char *s, const char *find, size_t slen)
|
|
{
|
|
char c, sc;
|
|
size_t len;
|
|
|
|
if ((c = *find++) != '\0') {
|
|
len = strlen(find);
|
|
do {
|
|
do {
|
|
if (slen-- < 1 || (sc = *s++) == '\0')
|
|
return (NULL);
|
|
} while (sc != c);
|
|
if (len > slen)
|
|
return (NULL);
|
|
} while (strncmp(s, find, len) != 0);
|
|
s--;
|
|
}
|
|
return ((char *)__UNCONST(s));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Convert characters A-Z to lowercase (intentionally avoid any locale
|
|
* specific conversions).
|
|
*/
|
|
static char
|
|
fetch_ssl_tolower(char in)
|
|
{
|
|
if (in >= 'A' && in <= 'Z')
|
|
return (in + 32);
|
|
else
|
|
return (in);
|
|
}
|
|
|
|
/*
|
|
* isalpha implementation that intentionally avoids any locale specific
|
|
* conversions.
|
|
*/
|
|
static int
|
|
fetch_ssl_isalpha(char in)
|
|
{
|
|
return ((in >= 'A' && in <= 'Z') || (in >= 'a' && in <= 'z'));
|
|
}
|
|
|
|
/*
|
|
* Check if passed hostnames a and b are equal.
|
|
*/
|
|
static int
|
|
fetch_ssl_hname_equal(const char *a, size_t alen, const char *b,
|
|
size_t blen)
|
|
{
|
|
size_t i;
|
|
|
|
if (alen != blen)
|
|
return (0);
|
|
for (i = 0; i < alen; ++i) {
|
|
if (fetch_ssl_tolower(a[i]) != fetch_ssl_tolower(b[i]))
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Check if domain label is traditional, meaning that only A-Z, a-z, 0-9
|
|
* and '-' (hyphen) are allowed. Hyphens have to be surrounded by alpha-
|
|
* numeric characters. Double hyphens (like they're found in IDN a-labels
|
|
* 'xn--') are not allowed. Empty labels are invalid.
|
|
*/
|
|
static int
|
|
fetch_ssl_is_trad_domain_label(const char *l, size_t len, int wcok)
|
|
{
|
|
size_t i;
|
|
|
|
if (!len || l[0] == '-' || l[len-1] == '-')
|
|
return (0);
|
|
for (i = 0; i < len; ++i) {
|
|
if (!isdigit(l[i]) &&
|
|
!fetch_ssl_isalpha(l[i]) &&
|
|
!(l[i] == '*' && wcok) &&
|
|
!(l[i] == '-' && l[i - 1] != '-'))
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Check if host name consists only of numbers. This might indicate an IP
|
|
* address, which is not a good idea for CN wildcard comparison.
|
|
*/
|
|
static int
|
|
fetch_ssl_hname_is_only_numbers(const char *hostname, size_t len)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
if (!((hostname[i] >= '0' && hostname[i] <= '9') ||
|
|
hostname[i] == '.'))
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Check if the host name h passed matches the pattern passed in m which
|
|
* is usually part of subjectAltName or CN of a certificate presented to
|
|
* the client. This includes wildcard matching. The algorithm is based on
|
|
* RFC6125, sections 6.4.3 and 7.2, which clarifies RFC2818 and RFC3280.
|
|
*/
|
|
static int
|
|
fetch_ssl_hname_match(const char *h, size_t hlen, const char *m,
|
|
size_t mlen)
|
|
{
|
|
int delta, hdotidx, mdot1idx, wcidx;
|
|
const char *hdot, *mdot1, *mdot2;
|
|
const char *wc; /* wildcard */
|
|
|
|
if (!(h && *h && m && *m))
|
|
return (0);
|
|
if ((wc = strnstr(m, "*", mlen)) == NULL)
|
|
return (fetch_ssl_hname_equal(h, hlen, m, mlen));
|
|
wcidx = wc - m;
|
|
/* hostname should not be just dots and numbers */
|
|
if (fetch_ssl_hname_is_only_numbers(h, hlen))
|
|
return (0);
|
|
/* only one wildcard allowed in pattern */
|
|
if (strnstr(wc + 1, "*", mlen - wcidx - 1) != NULL)
|
|
return (0);
|
|
/*
|
|
* there must be at least two more domain labels and
|
|
* wildcard has to be in the leftmost label (RFC6125)
|
|
*/
|
|
mdot1 = strnstr(m, ".", mlen);
|
|
if (mdot1 == NULL || mdot1 < wc || (mlen - (mdot1 - m)) < 4)
|
|
return (0);
|
|
mdot1idx = mdot1 - m;
|
|
mdot2 = strnstr(mdot1 + 1, ".", mlen - mdot1idx - 1);
|
|
if (mdot2 == NULL || (mlen - (mdot2 - m)) < 2)
|
|
return (0);
|
|
/* hostname must contain a dot and not be the 1st char */
|
|
hdot = strnstr(h, ".", hlen);
|
|
if (hdot == NULL || hdot == h)
|
|
return (0);
|
|
hdotidx = hdot - h;
|
|
/*
|
|
* host part of hostname must be at least as long as
|
|
* pattern it's supposed to match
|
|
*/
|
|
if (hdotidx < mdot1idx)
|
|
return (0);
|
|
/*
|
|
* don't allow wildcards in non-traditional domain names
|
|
* (IDN, A-label, U-label...)
|
|
*/
|
|
if (!fetch_ssl_is_trad_domain_label(h, hdotidx, 0) ||
|
|
!fetch_ssl_is_trad_domain_label(m, mdot1idx, 1))
|
|
return (0);
|
|
/* match domain part (part after first dot) */
|
|
if (!fetch_ssl_hname_equal(hdot, hlen - hdotidx, mdot1,
|
|
mlen - mdot1idx))
|
|
return (0);
|
|
/* match part left of wildcard */
|
|
if (!fetch_ssl_hname_equal(h, wcidx, m, wcidx))
|
|
return (0);
|
|
/* match part right of wildcard */
|
|
delta = mdot1idx - wcidx - 1;
|
|
if (!fetch_ssl_hname_equal(hdot - delta, delta,
|
|
mdot1 - delta, delta))
|
|
return (0);
|
|
/* all tests succeded, it's a match */
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Get numeric host address info - returns NULL if host was not an IP
|
|
* address. The caller is responsible for deallocation using
|
|
* freeaddrinfo(3).
|
|
*/
|
|
static struct addrinfo *
|
|
fetch_ssl_get_numeric_addrinfo(const char *hostname, size_t len)
|
|
{
|
|
struct addrinfo hints, *res;
|
|
char *host;
|
|
|
|
host = (char *)malloc(len + 1);
|
|
memcpy(host, hostname, len);
|
|
host[len] = '\0';
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
/* port is not relevant for this purpose */
|
|
if (getaddrinfo(host, "443", &hints, &res) != 0) {
|
|
free(host);
|
|
return NULL;
|
|
}
|
|
free(host);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Compare ip address in addrinfo with address passes.
|
|
*/
|
|
static int
|
|
fetch_ssl_ipaddr_match_bin(const struct addrinfo *lhost, const char *rhost,
|
|
size_t rhostlen)
|
|
{
|
|
const void *left;
|
|
|
|
if (lhost->ai_family == AF_INET && rhostlen == 4) {
|
|
left = (void *)&((struct sockaddr_in*)(void *)
|
|
lhost->ai_addr)->sin_addr.s_addr;
|
|
#ifdef INET6
|
|
} else if (lhost->ai_family == AF_INET6 && rhostlen == 16) {
|
|
left = (void *)&((struct sockaddr_in6 *)(void *)
|
|
lhost->ai_addr)->sin6_addr;
|
|
#endif
|
|
} else
|
|
return (0);
|
|
return (!memcmp(left, (const void *)rhost, rhostlen) ? 1 : 0);
|
|
}
|
|
|
|
/*
|
|
* Compare ip address in addrinfo with host passed. If host is not an IP
|
|
* address, comparison will fail.
|
|
*/
|
|
static int
|
|
fetch_ssl_ipaddr_match(const struct addrinfo *laddr, const char *r,
|
|
size_t rlen)
|
|
{
|
|
struct addrinfo *raddr;
|
|
int ret;
|
|
char *rip;
|
|
|
|
ret = 0;
|
|
if ((raddr = fetch_ssl_get_numeric_addrinfo(r, rlen)) == NULL)
|
|
return 0; /* not a numeric host */
|
|
|
|
if (laddr->ai_family == raddr->ai_family) {
|
|
if (laddr->ai_family == AF_INET) {
|
|
rip = (char *)&((struct sockaddr_in *)(void *)
|
|
raddr->ai_addr)->sin_addr.s_addr;
|
|
ret = fetch_ssl_ipaddr_match_bin(laddr, rip, 4);
|
|
#ifdef INET6
|
|
} else if (laddr->ai_family == AF_INET6) {
|
|
rip = (char *)&((struct sockaddr_in6 *)(void *)
|
|
raddr->ai_addr)->sin6_addr;
|
|
ret = fetch_ssl_ipaddr_match_bin(laddr, rip, 16);
|
|
#endif
|
|
}
|
|
}
|
|
freeaddrinfo(raddr);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Verify server certificate by subjectAltName.
|
|
*/
|
|
static int
|
|
fetch_ssl_verify_altname(STACK_OF(GENERAL_NAME) *altnames,
|
|
const char *host, struct addrinfo *ip)
|
|
{
|
|
const GENERAL_NAME *name;
|
|
size_t nslen;
|
|
int i;
|
|
const char *ns;
|
|
|
|
for (i = 0; i < sk_GENERAL_NAME_num(altnames); ++i) {
|
|
name = sk_GENERAL_NAME_value(altnames, i);
|
|
ns = (const char *)ASN1_STRING_get0_data(name->d.ia5);
|
|
nslen = (size_t)ASN1_STRING_length(name->d.ia5);
|
|
|
|
if (name->type == GEN_DNS && ip == NULL &&
|
|
fetch_ssl_hname_match(host, strlen(host), ns, nslen))
|
|
return (1);
|
|
else if (name->type == GEN_IPADD && ip != NULL &&
|
|
fetch_ssl_ipaddr_match_bin(ip, ns, nslen))
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Verify server certificate by CN.
|
|
*/
|
|
static int
|
|
fetch_ssl_verify_cn(X509_NAME *subject, const char *host,
|
|
struct addrinfo *ip)
|
|
{
|
|
ASN1_STRING *namedata;
|
|
X509_NAME_ENTRY *nameentry;
|
|
int cnlen, lastpos, loc, ret;
|
|
unsigned char *cn;
|
|
|
|
ret = 0;
|
|
lastpos = -1;
|
|
loc = -1;
|
|
cn = NULL;
|
|
/* get most specific CN (last entry in list) and compare */
|
|
while ((lastpos = X509_NAME_get_index_by_NID(subject,
|
|
NID_commonName, lastpos)) != -1)
|
|
loc = lastpos;
|
|
|
|
if (loc > -1) {
|
|
nameentry = X509_NAME_get_entry(subject, loc);
|
|
namedata = X509_NAME_ENTRY_get_data(nameentry);
|
|
cnlen = ASN1_STRING_to_UTF8(&cn, namedata);
|
|
if (ip == NULL &&
|
|
fetch_ssl_hname_match(host, strlen(host), (const char *)cn, cnlen))
|
|
ret = 1;
|
|
else if (ip != NULL && fetch_ssl_ipaddr_match(ip, (const char *)cn, cnlen))
|
|
ret = 1;
|
|
OPENSSL_free(cn);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Verify that server certificate subjectAltName/CN matches
|
|
* hostname. First check, if there are alternative subject names. If yes,
|
|
* those have to match. Only if those don't exist it falls back to
|
|
* checking the subject's CN.
|
|
*/
|
|
static int
|
|
fetch_ssl_verify_hname(X509 *cert, const char *host)
|
|
{
|
|
struct addrinfo *ip;
|
|
STACK_OF(GENERAL_NAME) *altnames;
|
|
X509_NAME *subject;
|
|
int ret;
|
|
|
|
ret = 0;
|
|
ip = fetch_ssl_get_numeric_addrinfo(host, strlen(host));
|
|
altnames = X509_get_ext_d2i(cert, NID_subject_alt_name,
|
|
NULL, NULL);
|
|
|
|
if (altnames != NULL) {
|
|
ret = fetch_ssl_verify_altname(altnames, host, ip);
|
|
} else {
|
|
subject = X509_get_subject_name(cert);
|
|
if (subject != NULL)
|
|
ret = fetch_ssl_verify_cn(subject, host, ip);
|
|
}
|
|
|
|
if (ip != NULL)
|
|
freeaddrinfo(ip);
|
|
if (altnames != NULL)
|
|
GENERAL_NAMES_free(altnames);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Configure transport security layer based on environment.
|
|
*/
|
|
static void
|
|
fetch_ssl_setup_transport_layer(SSL_CTX *ctx, int verbose)
|
|
{
|
|
long ssl_ctx_options;
|
|
|
|
ssl_ctx_options = SSL_OP_ALL | SSL_OP_NO_SSLv2 | SSL_OP_NO_TICKET;
|
|
if (getenv("SSL_ALLOW_SSL3") == NULL)
|
|
ssl_ctx_options |= SSL_OP_NO_SSLv3;
|
|
if (getenv("SSL_NO_TLS1") != NULL)
|
|
ssl_ctx_options |= SSL_OP_NO_TLSv1;
|
|
if (getenv("SSL_NO_TLS1_1") != NULL)
|
|
ssl_ctx_options |= SSL_OP_NO_TLSv1_1;
|
|
if (getenv("SSL_NO_TLS1_2") != NULL)
|
|
ssl_ctx_options |= SSL_OP_NO_TLSv1_2;
|
|
if (verbose)
|
|
fetch_info("SSL options: %lx", ssl_ctx_options);
|
|
SSL_CTX_set_options(ctx, ssl_ctx_options);
|
|
}
|
|
|
|
|
|
/*
|
|
* Configure peer verification based on environment.
|
|
*/
|
|
static int
|
|
fetch_ssl_setup_peer_verification(SSL_CTX *ctx, int verbose)
|
|
{
|
|
X509_LOOKUP *crl_lookup;
|
|
X509_STORE *crl_store;
|
|
const char *ca_cert_file, *ca_cert_path, *crl_file;
|
|
|
|
if (getenv("SSL_NO_VERIFY_PEER") == NULL) {
|
|
ca_cert_file = getenv("SSL_CA_CERT_FILE");
|
|
ca_cert_path = getenv("SSL_CA_CERT_PATH") != NULL ?
|
|
getenv("SSL_CA_CERT_PATH") : X509_get_default_cert_dir();
|
|
if (verbose) {
|
|
fetch_info("Peer verification enabled");
|
|
if (ca_cert_file != NULL)
|
|
fetch_info("Using CA cert file: %s",
|
|
ca_cert_file);
|
|
if (ca_cert_path != NULL)
|
|
fetch_info("Using CA cert path: %s",
|
|
ca_cert_path);
|
|
}
|
|
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER,
|
|
fetch_ssl_cb_verify_crt);
|
|
SSL_CTX_load_verify_locations(ctx, ca_cert_file,
|
|
ca_cert_path);
|
|
if ((crl_file = getenv("SSL_CRL_FILE")) != NULL) {
|
|
if (verbose)
|
|
fetch_info("Using CRL file: %s", crl_file);
|
|
|
|
crl_store = SSL_CTX_get_cert_store(ctx);
|
|
crl_lookup = X509_STORE_add_lookup(crl_store,
|
|
X509_LOOKUP_file());
|
|
if (crl_lookup == NULL ||
|
|
!X509_load_crl_file(crl_lookup, crl_file,
|
|
X509_FILETYPE_PEM)) {
|
|
fprintf(stderr,
|
|
"Could not load CRL file %s\n",
|
|
crl_file);
|
|
return (0);
|
|
}
|
|
X509_STORE_set_flags(crl_store,
|
|
X509_V_FLAG_CRL_CHECK |
|
|
X509_V_FLAG_CRL_CHECK_ALL);
|
|
}
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Configure client certificate based on environment.
|
|
*/
|
|
static int
|
|
fetch_ssl_setup_client_certificate(SSL_CTX *ctx, int verbose)
|
|
{
|
|
const char *client_cert_file, *client_key_file;
|
|
|
|
if ((client_cert_file = getenv("SSL_CLIENT_CERT_FILE")) != NULL) {
|
|
client_key_file = getenv("SSL_CLIENT_KEY_FILE") != NULL ?
|
|
getenv("SSL_CLIENT_KEY_FILE") : client_cert_file;
|
|
if (verbose) {
|
|
fetch_info("Using client cert file: %s",
|
|
client_cert_file);
|
|
fetch_info("Using client key file: %s",
|
|
client_key_file);
|
|
}
|
|
if (SSL_CTX_use_certificate_chain_file(ctx,
|
|
client_cert_file) != 1) {
|
|
fprintf(stderr,
|
|
"Could not load client certificate %s\n",
|
|
client_cert_file);
|
|
return (0);
|
|
}
|
|
if (SSL_CTX_use_PrivateKey_file(ctx, client_key_file,
|
|
SSL_FILETYPE_PEM) != 1) {
|
|
fprintf(stderr,
|
|
"Could not load client key %s\n",
|
|
client_key_file);
|
|
return (0);
|
|
}
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Callback for SSL certificate verification, this is called on server
|
|
* cert verification. It takes no decision, but informs the user in case
|
|
* verification failed.
|
|
*/
|
|
int
|
|
fetch_ssl_cb_verify_crt(int verified, X509_STORE_CTX *ctx)
|
|
{
|
|
X509 *crt;
|
|
X509_NAME *name;
|
|
char *str;
|
|
|
|
str = NULL;
|
|
if (!verified) {
|
|
if ((crt = X509_STORE_CTX_get_current_cert(ctx)) != NULL &&
|
|
(name = X509_get_subject_name(crt)) != NULL)
|
|
str = X509_NAME_oneline(name, 0, 0);
|
|
fprintf(stderr, "Certificate verification failed for %s\n",
|
|
str != NULL ? str : "no relevant certificate");
|
|
OPENSSL_free(str);
|
|
}
|
|
return (verified);
|
|
}
|
|
|
|
static pthread_once_t ssl_init_once = PTHREAD_ONCE_INIT;
|
|
|
|
static void
|
|
ssl_init(void)
|
|
{
|
|
/* Init the SSL library and context */
|
|
SSL_load_error_strings();
|
|
SSL_library_init();
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Enable SSL on a connection.
|
|
*/
|
|
int
|
|
fetch_ssl(conn_t *conn, const struct url *URL, int verbose)
|
|
{
|
|
|
|
#ifdef WITH_SSL
|
|
int ret;
|
|
X509_NAME *name;
|
|
char *str;
|
|
|
|
(void)pthread_once(&ssl_init_once, ssl_init);
|
|
|
|
conn->ssl_ctx = SSL_CTX_new(SSLv23_client_method());
|
|
if (conn->ssl_ctx == NULL) {
|
|
fprintf(stderr, "failed to create SSL context\n");
|
|
ERR_print_errors_fp(stderr);
|
|
return -1;
|
|
}
|
|
SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY);
|
|
|
|
fetch_ssl_setup_transport_layer(conn->ssl_ctx, verbose);
|
|
if (!fetch_ssl_setup_peer_verification(conn->ssl_ctx, verbose))
|
|
return (-1);
|
|
if (!fetch_ssl_setup_client_certificate(conn->ssl_ctx, verbose))
|
|
return (-1);
|
|
|
|
conn->ssl = SSL_new(conn->ssl_ctx);
|
|
if (conn->ssl == NULL) {
|
|
fprintf(stderr, "SSL context creation failed\n");
|
|
return (-1);
|
|
}
|
|
SSL_set_connect_state(conn->ssl);
|
|
if (!SSL_set_fd(conn->ssl, conn->sd)) {
|
|
fprintf(stderr, "SSL_set_fd failed\n");
|
|
return (-1);
|
|
}
|
|
#if OPENSSL_VERSION_NUMBER >= 0x0090806fL && !defined(OPENSSL_NO_TLSEXT)
|
|
if (!SSL_set_tlsext_host_name(conn->ssl, (char *)(uintptr_t)URL->host)) {
|
|
fprintf(stderr,
|
|
"TLS server name indication extension failed for host %s\n",
|
|
URL->host);
|
|
return (-1);
|
|
}
|
|
#endif
|
|
if ((ret = SSL_connect(conn->ssl)) <= 0){
|
|
fprintf(stderr, "SSL_connect returned %d\n", SSL_get_error(conn->ssl, ret));
|
|
return (-1);
|
|
}
|
|
|
|
conn->ssl_cert = SSL_get_peer_certificate(conn->ssl);
|
|
|
|
if (conn->ssl_cert == NULL) {
|
|
fprintf(stderr, "No server SSL certificate\n");
|
|
return (-1);
|
|
}
|
|
|
|
if (getenv("SSL_NO_VERIFY_HOSTNAME") == NULL) {
|
|
if (verbose)
|
|
fetch_info("Verify hostname");
|
|
if (!fetch_ssl_verify_hname(conn->ssl_cert, URL->host)) {
|
|
fprintf(stderr,
|
|
"SSL certificate subject doesn't match host %s\n",
|
|
URL->host);
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
if (verbose) {
|
|
fetch_info("%s connection established using %s",
|
|
SSL_get_version(conn->ssl), 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);
|
|
fetch_info("Certificate subject: %s", str);
|
|
OPENSSL_free(str);
|
|
name = X509_get_issuer_name(conn->ssl_cert);
|
|
str = X509_NAME_oneline(name, 0, 0);
|
|
fetch_info("Certificate issuer: %s", str);
|
|
OPENSSL_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 (!buf)
|
|
return -1;
|
|
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;
|
|
#ifdef WITH_SSL
|
|
if (conn->ssl && SSL_pending(conn->ssl))
|
|
break;
|
|
#endif
|
|
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;
|
|
|
|
#ifdef WITH_SSL
|
|
if (conn->ssl) {
|
|
SSL_shutdown(conn->ssl);
|
|
SSL_set_connect_state(conn->ssl);
|
|
SSL_free(conn->ssl);
|
|
conn->ssl = NULL;
|
|
}
|
|
if (conn->ssl_ctx) {
|
|
SSL_CTX_free(conn->ssl_ctx);
|
|
conn->ssl_ctx = NULL;
|
|
}
|
|
if (conn->ssl_cert) {
|
|
X509_free(conn->ssl_cert);
|
|
conn->ssl_cert = NULL;
|
|
}
|
|
#endif
|
|
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);
|
|
}
|