[PATCH 8/8] git proxy: Document usage of oe-git-proxy.sh and remove alternatives

Darren Hart
2013-02-05T10:46:31Z

The new oe-git-proxy.sh should address all git proxying needs. Document
it's usage in meta-yocto/conf/site.conf.sample and remove the other
implementations.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
meta-yocto/conf/site.conf.sample | 35 +-
scripts/oe-git-proxy-command | 10 -
scripts/oe-git-proxy-socks-command | 23 -
scripts/oe-git-proxy-socks.c | 2982 ------------------------------------
4 files changed, 9 insertions(+), 3041 deletions(-)
delete mode 100755 scripts/oe-git-proxy-command
delete mode 100755 scripts/oe-git-proxy-socks-command
delete mode 100755 scripts/oe-git-proxy-socks.c

diff --git a/meta-yocto/conf/site.conf.sample b/meta-yocto/conf/site.conf.sample
index 68d1da9..2834702 100644
--- a/meta-yocto/conf/site.conf.sample
+++ b/meta-yocto/conf/site.conf.sample
@@ -16,32 +16,15 @@ SCONF_VERSION = "1"
#http-proxy-port = 81
#

-# Uncomment to cause git to use the proxy host specificed
-# although this only works for http
-#GIT_PROXY_HOST = "proxy.example.com"
-#GIT_PROXY_PORT = "81"
-#export GIT_PROXY_COMMAND = "${COREBASE}/scripts/oe-git-proxy-command"
-
-# Set to yes to have a gitconfig generated for handling proxies; you
-# might not want this if you have all that set in your global git
-# configuration. If you don't enable it, the rest of the entries
-# (_PROXY_IGNORE, etc) don't really work that well
-#GIT_CORE_CONFIG = "Yes"
-
-# Space separate list of hosts to ignore for GIT proxy
-#GIT_PROXY_IGNORE = "host.server.com another.server.com"
-
-# If SOCKS is available run the following command to comple a simple transport
-# gcc scripts/oe-git-proxy-socks.c -o oe-git-proxy-socks
-# and then share that binary somewhere in PATH, then use the following settings
-#GIT_PROXY_HOST = "proxy.example.com"
-#GIT_PROXY_PORT = "81"
-
-# GIT_PROXY_COMMAND is used by git to override all proxy settings from
-# configuration files, so we prefix OE_ to avoid breaking havoc on the
-# generated (or local) gitconfig's.
-#OE_GIT_PROXY_COMMAND = "${COREBASE}/scripts/oe-git-proxy-socks-command"
-
+# To use git with a proxy, you must use an external git proxy command, such as
+# the one provided by scripts/oe-git-proxy.sh. To use this script, copy it to
+# your PATH and uncomment the following:
+#GIT_PROXY_COMMAND="oe-git-proxy.sh"
+#ALL_PROXY="socks://socks.example.com:1080"
+#or
+#ALL_PROXY="https://proxy.example.com:8080"
+# If you wish to use certain hosts without the proxy, specify them in NO_PROXY.
+# See the script for details on syntax.

# Uncomment this to use a shared download directory
#DL_DIR = "/some/shared/download/directory/"
diff --git a/scripts/oe-git-proxy-command b/scripts/oe-git-proxy-command
deleted file mode 100755
index d31f85a..0000000
--- a/scripts/oe-git-proxy-command
+++ /dev/null
@@ -1,10 +0,0 @@
-#! /bin/bash
-
-(echo "CONNECT $1:$2 HTTP/1.0";
- echo;
- cat ) | nc $GIT_PROXY_HOST $GIT_PROXY_PORT |
-
-(read a;
- read a;
- read a;
- cat )
\ No newline at end of file
diff --git a/scripts/oe-git-proxy-socks-command b/scripts/oe-git-proxy-socks-command
deleted file mode 100755
index 8acffb5..0000000
--- a/scripts/oe-git-proxy-socks-command
+++ /dev/null
@@ -1,23 +0,0 @@
-#! /bin/bash
-SCRIPTDIR=`dirname $0`
-# Check oe-git-proxy-socks exists
-PROXYSOCKS=`which oe-git-proxy-socks 2> /dev/null`
-if [ -z "$PROXYSOCKS" -a -e "$SCRIPTDIR/oe-git-proxy-socks.c" ]; then
- # If not try and build it
- gcc $SCRIPTDIR/oe-git-proxy-socks.c -o $SCRIPTDIR/oe-git-proxy-socks
-fi
-PROXYSOCKS=`which oe-git-proxy-socks 2> /dev/null`
-if [ ! -x "$PROXYSOCKS" ]; then
- # If that fails, we can see if netcat (nc) is available
- NETCAT=`which nc 2> /dev/null`
- if [ ! -x "$NETCAT" ]; then
- # If that fails, explain to the user
- echo "Unable to find oe-git-proxy-socks. This is usually created with the command"
- echo "'gcc scripts/oe-git-proxy-socks.c -o scripts/oe-git-proxy-socks' which we tried"
- echo "but it doesn't seem to have worked. Please compile the binary manually."
- echo "Alternativly, install nc (netcat) on this machine."
- exit 1
- fi
- exec $NETCAT -x $GIT_PROXY_HOST:$GIT_PROXY_PORT "$@"
-fi
-oe-git-proxy-socks -S $GIT_PROXY_HOST:$GIT_PROXY_PORT $@
diff --git a/scripts/oe-git-proxy-socks.c b/scripts/oe-git-proxy-socks.c
deleted file mode 100755
index f574711..0000000
--- a/scripts/oe-git-proxy-socks.c
+++ /dev/null
@@ -1,2982 +0,0 @@
-/***********************************************************************
- * connect.c -- Make socket connection using SOCKS4/5 and HTTP tunnel.
- *
- * Copyright (c) 2000-2006 Shun-ichi Goto
- * Copyright (c) 2002, J. Grant (English Corrections)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * ---------------------------------------------------------
- * PROJECT: My Test Program
- * AUTHOR: Shun-ichi GOTO <gotoh@taiyo.co.jp>
- * CREATE: Wed Jun 21, 2000
- * REVISION: $Revision: 100 $
- * ---------------------------------------------------------
- *
- * Getting Source
- * ==============
- *
- * Recent version of 'connect.c' is available from
- * http://www.taiyo.co.jp/~gotoh/ssh/connect.c
- *
- * Related tool, ssh-askpass.exe (alternative ssh-askpass on UNIX)
- * is available:
- * http://www.taiyo.co.jp/~gotoh/ssh/ssh-askpass.exe.gz
- *
- * See more detail:
- * http://www.taiyo.co.jp/~gotoh/ssh/connect.html
- *
- * How To Compile
- * ==============
- *
- * On UNIX environment:
- * $ gcc connect.c -o connect
- *
- * On SOLARIS:
- * $ gcc -o connect -lresolv -lsocket -lnsl connect.c
- *
- * on Win32 environment:
- * $ cl connect.c wsock32.lib advapi32.lib
- * or
- * $ bcc32 connect.c wsock32.lib advapi32.lib
- * or
- * $ gcc connect.c -o connect
- *
- * on Mac OS X environment:
- * $ gcc connect.c -o connect -lresolv
- * or
- * $ gcc connect.c -o connect -DBIND_8_COMPAT=1
- *
- * How To Use
- * ==========
- *
- * You can specify proxy method in an environment variable or in a
- * command line option.
- *
- * usage: connect [-dnhst45] [-R resolve] [-p local-port] [-w sec]
- * [-H [user@]proxy-server[:port]]
- * [-S [user@]socks-server[:port]]
- * [-T proxy-server[:port]]
- * [-c telnet proxy command]
- * host port
- *
- * "host" and "port" is for the target hostname and port-number to
- * connect to.
- *
- * The -H option specifys a hostname and port number of the http proxy
- * server to relay. If port is omitted, 80 is used. You can specify this
- * value in the environment variable HTTP_PROXY and pass the -h option
- * to use it.
- *
- * The -S option specifys the hostname and port number of the SOCKS
- * server to relay. Like -H, port number can be omitted and the default
- * is 1080. You can also specify this value pair in the environment
- * variable SOCKS5_SERVER and give the -s option to use it.
- *
- * The '-4' and the '-5' options are for specifying SOCKS relaying and
- * indicates protocol version to use. It is valid only when used with
- * '-s' or '-S'. Default is '-5' (protocol version 5)
- *
- * The '-R' option is for specifying method to resolve the
- * hostname. Three keywords ("local", "remote", "both") or dot-notation
- * IP address are acceptable. The keyword "both" means, "Try local
- * first, then remote". If a dot-notation IP address is specified, use
- * this host as nameserver. The default is "remote" for SOCKS5 or
- * "local" for others. On SOCKS4 protocol, remote resolving method
- * ("remote" and "both") requires protocol 4a supported server.
- *
- * The '-p' option will forward a local TCP port instead of using the
- * standard input and output.
- *
- * The '-P' option is same to '-p' except keep remote session. The
- * program repeats waiting the port with holding remote session without
- * disconnecting. To disconnect the remote session, send EOF to stdin or
- * kill the program.
- *
- * The '-w' option specifys timeout seconds for making connection with
- * TARGET host.
- *
- * The '-d' option is used for debug. If you fail to connect, use this
- * and check request to and response from server.
- *
- * You can omit the "port" argument when program name is special format
- * containing port number itself. For example,
- * $ ln -s connect connect-25
- * means this connect-25 command is spcifying port number 25 already
- * so you need not 2nd argument (and ignored if specified).
- *
- * To use proxy, this example is for SOCKS5 connection to connect to
- * 'host' at port 25 via SOCKS5 server on 'firewall' host.
- * $ connect -S firewall host 25
- * or
- * $ SOCKS5_SERVER=firewall; export SOCKS5_SERVER
- * $ connect -s host 25
- *
- * For a HTTP-PROXY connection:
- * $ connect -H proxy-server:8080 host 25
- * or
- * $ HTTP_PROXY=proxy-server:8080; export HTTP_PROXY
- * $ connect -h host 25
- * To forward a local port, for example to use ssh:
- * $ connect -p 5550 -H proxy-server:8080 host 22
- * ($ ssh -l user -p 5550 localhost )
- *
- * TIPS
- * ====
- *
- * Connect.c doesn't have any configuration to specify the SOCKS server.
- * If you are a mobile user, this limitation might bother you. However,
- * You can compile connect.c and link with other standard SOCKS library
- * like the NEC SOCKS5 library or Dante. This means connect.c is
- * socksified and uses a configration file like to other SOCKSified
- * network commands and you can switch configuration file any time
- * (ex. when ppp startup) that brings you switching of SOCKS server for
- * connect.c in same way with other commands. For this case, you can
- * write ~/.ssh/config like this:
- *
- * ProxyCommand connect -n %h %p
- *
- * SOCKS5 authentication
- * =====================
- *
- * Only USER/PASS authentication is supported.
- *
- * Proxy authentication
- * ====================
- *
- * Only BASIC scheme is supported.
- *
- * Authentication informations
- * ===========================
- *
- * User name for authentication is specifed by an environment variable
- * or system login name. And password is specified from environment
- * variable or external program (specified in $SSH_ASKPASS) or tty.
- *
- * Following environment variable is used for specifying user name.
- * SOCKS: $SOCKS5_USER, $LOGNAME, $USER
- * HTTP Proxy: $HTTP_PROXY_USER, $LOGNAME, $USER
- *
- * ssh-askpass support
- * ===================
- *
- * You can use ssh-askpass (came from OpenSSH or else) to specify
- * password on graphical environment (X-Window or MS Windows). To use
- * this, set program name to environment variable SSH_ASKPASS. On UNIX,
- * X-Window must be required, so $DISPLAY environment variable is also
- * needed. On Win32 environment, $DISPLAY is not mentioned.
- *
- * Related Informations
- * ====================
- *
- * SOCKS5 -- RFC 1928, RFC 1929, RFC 1961
- * NEC SOCKS Reference Implementation is available from:
- * http://www.socks.nec.com
- * DeleGate version 5 or earlier can be SOCKS4 server,
- * and version 6 can be SOCKS5 and SOCKS4 server.
- * and version 7.7.0 or later can be SOCKS5 and SOCKS4a server.
- * http://www.delegate.org/delegate/
- *
- * HTTP-Proxy --
- * Many http proxy servers supports this, but https should
- * be allowed as configuration on your host.
- * For example on DeleGate, you should add "https" to the
- * "REMITTABLE" parameter to allow HTTP-Proxy like this:
- * delegated -Pxxxx ...... REMITTABLE="+,https" ...
- *
- * Hypertext Transfer Protocol -- HTTP/1.1 -- RFC 2616
- * HTTP Authentication: Basic and Digest Access Authentication -- RFC 2617
- * For proxy authentication, refer these documents.
- *
- ***********************************************************************/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <memory.h>
-#include <errno.h>
-#include <assert.h>
-#include <sys/types.h>
-#include <stdarg.h>
-#include <fcntl.h>
-#include <signal.h>
-
-#ifdef __CYGWIN32__
-#undef _WIN32
-#endif
-
-#ifdef _WIN32
-#include <windows.h>
-#include <winsock.h>
-#include <sys/stat.h>
-#include <io.h>
-#include <conio.h>
-#else /* !_WIN32 */
-#include <unistd.h>
-#include <pwd.h>
-#include <termios.h>
-#include <sys/time.h>
-#ifndef __hpux
-#include <sys/select.h>
-#endif /* __hpux */
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
-#define WITH_RESOLVER 1
-#include <arpa/nameser.h>
-#include <resolv.h>
-#else /* not ( not _WIN32 && not __CYGWIN32__) */
-#undef WITH_RESOLVER
-#endif /* not ( not _WIN32 && not __CYGWIN32__) */
-#endif /* !_WIN32 */
-
-#ifdef _WIN32
-#define ECONNRESET WSAECONNRESET
-#endif /* _WI32 */
-
-
-
-#ifndef LINT
-static char *vcid = "$Id: connect.c 100 2007-07-03 10:48:26Z gotoh $";
-#endif
-
-/* Microsoft Visual C/C++ has _snprintf() and _vsnprintf() */
-#ifdef _MSC_VER
-#define snprintf _snprintf
-#define vsnprintf _vsnprintf
-#endif
-
-/* consider Borland C */
-#ifdef __BORLANDC__
-#define _kbhit kbhit
-#define _setmode setmode
-#endif
-
-/* help message.
- Win32 environment does not support -R option (vc and cygwin)
- Win32 native compilers does not support -w option, yet (vc)
-*/
-static char *usage = "usage: %s [-dnhst45] [-p local-port]"
-#ifdef _WIN32
-#ifdef __CYGWIN32__
-"[-w timeout] \n" /* cygwin cannot -R */
-#else /* not __CYGWIN32__ */
-" \n" /* VC cannot -w nor -R */
-#endif /* not __CYGWIN32__ */
-#else /* not _WIN32 */
-/* help message for UNIX */
-"[-R resolve] [-w timeout] \n"
-#endif /* not _WIN32 */
-" [-H proxy-server[:port]] [-S [user@]socks-server[:port]] \n"
-" [-T proxy-server[:port]]\n"
-" [-c telnet-proxy-command]\n"
-" host port\n";
-
-/* name of this program */
-char *progname = NULL;
-char *progdesc = "connect --- simple relaying command via proxy.";
-char *rcs_revstr = "$Revision: 100 $";
-char *revstr = NULL;
-int major_version = 1;
-int minor_version = 0;
-
-/* set of character for strspn() */
-const char *digits = "0123456789";
-const char *dotdigits = "0123456789.";
-
-/* options */
-int f_debug = 0;
-
-/* report flag to hide secure information */
-int f_report = 1;
-
-int connect_timeout = 0;
-
-/* local input type */
-#define LOCAL_STDIO 0
-#define LOCAL_SOCKET 1
-char *local_type_names[] = { "stdio", "socket" };
-int local_type = LOCAL_STDIO;
-u_short local_port = 0; /* option 'p' */
-int f_hold_session = 0; /* option 'P' */
-
-char *telnet_command = "telnet %h %p";
-
-/* utiity types, pair holder of number and string */
-typedef struct {
- int num;
- const char *str;
-} LOOKUP_ITEM;
-
-/* relay method, server and port */
-#define METHOD_UNDECIDED 0
-#define METHOD_DIRECT 1
-#define METHOD_SOCKS 2
-#define METHOD_HTTP 3
-#define METHOD_TELNET 4
-char *method_names[] = { "UNDECIDED", "DIRECT", "SOCKS", "HTTP", "TELNET" };
-
-int relay_method = METHOD_UNDECIDED; /* relaying method */
-char *relay_host = NULL; /* hostname of relay server */
-u_short relay_port = 0; /* port of relay server */
-char *relay_user = NULL; /* user name for auth */
-
-/* destination target host and port */
-char *dest_host = NULL;
-struct sockaddr_in dest_addr;
-u_short dest_port = 0;
-
-/* informations for SOCKS */
-#define SOCKS5_REP_SUCCEEDED 0x00 /* succeeded */
-#define SOCKS5_REP_FAIL 0x01 /* general SOCKS serer failure */
-#define SOCKS5_REP_NALLOWED 0x02 /* connection not allowed by ruleset */
-#define SOCKS5_REP_NUNREACH 0x03 /* Network unreachable */
-#define SOCKS5_REP_HUNREACH 0x04 /* Host unreachable */
-#define SOCKS5_REP_REFUSED 0x05 /* connection refused */
-#define SOCKS5_REP_EXPIRED 0x06 /* TTL expired */
-#define SOCKS5_REP_CNOTSUP 0x07 /* Command not supported */
-#define SOCKS5_REP_ANOTSUP 0x08 /* Address not supported */
-#define SOCKS5_REP_INVADDR 0x09 /* Inalid address */
-
-LOOKUP_ITEM socks5_rep_names[] = {
- { SOCKS5_REP_SUCCEEDED, "succeeded"},
- { SOCKS5_REP_FAIL, "general SOCKS server failure"},
- { SOCKS5_REP_NALLOWED, "connection not allowed by ruleset"},
- { SOCKS5_REP_NUNREACH, "Network unreachable"},
- { SOCKS5_REP_HUNREACH, "Host unreachable"},
- { SOCKS5_REP_REFUSED, "connection refused"},
- { SOCKS5_REP_EXPIRED, "TTL expired"},
- { SOCKS5_REP_CNOTSUP, "Command not supported"},
- { SOCKS5_REP_ANOTSUP, "Address not supported"},
- { SOCKS5_REP_INVADDR, "Invalid address"},
- { -1, NULL }
-};
-
-/* SOCKS5 authentication methods */
-#define SOCKS5_AUTH_REJECT 0xFF /* No acceptable auth method */
-#define SOCKS5_AUTH_NOAUTH 0x00 /* without authentication */
-#define SOCKS5_AUTH_GSSAPI 0x01 /* GSSAPI */
-#define SOCKS5_AUTH_USERPASS 0x02 /* User/Password */
-#define SOCKS5_AUTH_CHAP 0x03 /* Challenge-Handshake Auth Proto. */
-#define SOCKS5_AUTH_EAP 0x05 /* Extensible Authentication Proto. */
-#define SOCKS5_AUTH_MAF 0x08 /* Multi-Authentication Framework */
-
-#define SOCKS4_REP_SUCCEEDED 90 /* rquest granted (succeeded) */
-#define SOCKS4_REP_REJECTED 91 /* request rejected or failed */
-#define SOCKS4_REP_IDENT_FAIL 92 /* cannot connect identd */
-#define SOCKS4_REP_USERID 93 /* user id not matched */
-
-LOOKUP_ITEM socks4_rep_names[] = {
- { SOCKS4_REP_SUCCEEDED, "request granted (succeeded)"},
- { SOCKS4_REP_REJECTED, "request rejected or failed"},
- { SOCKS4_REP_IDENT_FAIL, "cannot connect identd"},
- { SOCKS4_REP_USERID, "user id not matched"},
- { -1, NULL }
-};
-
-#define RESOLVE_UNKNOWN 0
-#define RESOLVE_LOCAL 1
-#define RESOLVE_REMOTE 2
-#define RESOLVE_BOTH 3
-char *resolve_names[] = { "UNKNOWN", "LOCAL", "REMOTE", "BOTH" };
-
-int socks_version = 5; /* SOCKS protocol version */
-int socks_resolve = RESOLVE_UNKNOWN;
-struct sockaddr_in socks_ns;
-char *socks5_auth = NULL;
-
-/* Environment variable names */
-#define ENV_SOCKS_SERVER "SOCKS_SERVER" /* SOCKS server */
-#define ENV_SOCKS5_SERVER "SOCKS5_SERVER"
-#define ENV_SOCKS4_SERVER "SOCKS4_SERVER"
-
-#define ENV_SOCKS_RESOLVE "SOCKS_RESOLVE" /* resolve method */
-#define ENV_SOCKS5_RESOLVE "SOCKS5_RESOLVE"
-#define ENV_SOCKS4_RESOLVE "SOCKS4_RESOLVE"
-
-#define ENV_SOCKS5_USER "SOCKS5_USER" /* auth user for SOCKS5 */
-#define ENV_SOCKS4_USER "SOCKS4_USER" /* auth user for SOCKS4 */
-#define ENV_SOCKS_USER "SOCKS_USER" /* auth user for SOCKS */
-#define ENV_SOCKS5_PASSWD "SOCKS5_PASSWD" /* auth password for SOCKS5 */
-#define ENV_SOCKS5_PASSWORD "SOCKS5_PASSWORD" /* old style */
-
-#define ENV_HTTP_PROXY "HTTP_PROXY" /* common env var */
-#define ENV_HTTP_PROXY_USER "HTTP_PROXY_USER" /* auth user */
-#define ENV_HTTP_PROXY_PASSWORD "HTTP_PROXY_PASSWORD" /* auth password */
-
-#define ENV_TELNET_PROXY "TELNET_PROXY" /* common env var */
-
-#define ENV_CONNECT_USER "CONNECT_USER" /* default auth user name */
-#define ENV_CONNECT_PASSWORD "CONNECT_PASSWORD" /* default auth password */
-
-#define ENV_SOCKS_DIRECT "SOCKS_DIRECT" /* addr-list for non-proxy */
-#define ENV_SOCKS5_DIRECT "SOCKS5_DIRECT"
-#define ENV_SOCKS4_DIRECT "SOCKS4_DIRECT"
-#define ENV_HTTP_DIRECT "HTTP_DIRECT"
-#define ENV_CONNECT_DIRECT "CONNECT_DIRECT"
-
-#define ENV_SOCKS5_AUTH "SOCKS5_AUTH"
-#define ENV_SSH_ASKPASS "SSH_ASKPASS" /* askpass program */
-
-/* Prefix string of HTTP_PROXY */
-#define HTTP_PROXY_PREFIX "http://"
-#define PROXY_AUTH_NONE 0
-#define PROXY_AUTH_BASIC 1
-#define PROXY_AUTH_DIGEST 2
-int proxy_auth_type = PROXY_AUTH_NONE;
-
-/* reason of end repeating */
-#define REASON_UNK -2
-#define REASON_ERROR -1
-#define REASON_CLOSED_BY_LOCAL 0
-#define REASON_CLOSED_BY_REMOTE 1
-
-/* return value of relay start function. */
-#define START_ERROR -1
-#define START_OK 0
-#define START_RETRY 1
-
-/* socket related definitions */
-#ifndef _WIN32
-#define SOCKET int
-#endif
-#ifndef SOCKET_ERROR
-#define SOCKET_ERROR -1
-#endif
-
-#ifdef _WIN32
-#define socket_errno() WSAGetLastError()
-#else /* !_WIN32 */
-#define closesocket close
-#define socket_errno() (errno)
-#endif /* !_WIN32 */
-
-#ifdef _WIN32
-#define popen _popen
-#endif /* WIN32 */
-
-/* packet operation macro */
-#define PUT_BYTE(ptr,data) (*(unsigned char*)ptr = data)
-
-/* debug message output */
-void
-debug( const char *fmt, ... )
-{
- va_list args;
- if ( f_debug ) {
- va_start( args, fmt );
- fprintf(stderr, "DEBUG: ");
- vfprintf( stderr, fmt, args );
- va_end( args );
- }
-}
-
-void
-debug_( const char *fmt, ... ) /* without prefix */
-{
- va_list args;
- if ( f_debug ) {
- va_start( args, fmt );
- vfprintf( stderr, fmt, args );
- va_end( args );
- }
-}
-
-/* error message output */
-void
-error( const char *fmt, ... )
-{
- va_list args;
- va_start( args, fmt );
- fprintf(stderr, "ERROR: ");
- vfprintf( stderr, fmt, args );
- va_end( args );
-}
-
-void
-fatal( const char *fmt, ... )
-{
- va_list args;
- va_start( args, fmt );
- fprintf(stderr, "FATAL: ");
- vfprintf( stderr, fmt, args );
- va_end( args );
- exit (EXIT_FAILURE);
-}
-
-
-void *
-xmalloc (size_t size)
-{
- void *ret = malloc(size);
- if (ret == NULL)
- fatal("Cannot allocate memory: %d bytes.\n", size);
- return ret;
-}
-
-char *
-downcase( char *str )
-{
- char *buf = str;
- while ( *buf ) {
- if ( isupper(*buf) )
- *buf += 'a'-'A';
- buf++;
- }
- return str; /* return converted arg */
-}
-
-char *
-expand_host_and_port (const char *fmt, const char *host, int port)
-{
- const char *src;
- char *buf, *dst, *ptr;
- size_t len = strlen(fmt) + strlen(host) + 20;
- buf = xmalloc (len);
- dst = buf;
- src = fmt;
-
- while (*src) {
- if (*src == '%') {
- switch (src[1]) {
- case 'h':
- strcpy (dst, host);
- src += 2;
- break;
- case 'p':
- snprintf (dst, len, "%d", port);
- src += 2;
- break;
- default:
- src ++;
- break;
- }
- dst = buf + strlen (buf);
- } else if (*src == '\\') {
- switch (src[1]) {
- case 'r': /* CR */
- *dst++ = '\r';
- src += 2;
- break;
- case 'n': /* LF */
- *dst++ = '\n';
- src += 2;
- break;
- case 't': /* TAB */
- *dst++ = '\t';
- src += 2;
- break;
- default:
- src ++;
- break;
- }
- } else {
- /* usual */
- *dst++ = *src++;
- }
- *dst = '\0';
- }
- assert (strlen(buf) < len);
- return buf;
-}
-
-
-int
-lookup_resolve( const char *str )
-{
- char *buf = strdup( str );
- int ret;
-
- downcase( buf );
- if ( strcmp( buf, "both" ) == 0 )
- ret = RESOLVE_BOTH;
- else if ( strcmp( buf, "remote" ) == 0 )
- ret = RESOLVE_REMOTE;
- else if ( strcmp( buf, "local" ) == 0 )
- ret = RESOLVE_LOCAL;
- else if ( strspn(buf, dotdigits) == strlen(buf) ) {
-#ifndef WITH_RESOLVER
- fatal("Sorry, you can't specify to resolve the hostname with the -R option on Win32 environment.");
-#endif /* not WITH_RESOLVER */
- ret = RESOLVE_LOCAL; /* this case is also 'local' */
- socks_ns.sin_addr.s_addr = inet_addr(buf);
- socks_ns.sin_family = AF_INET;
- }
- else
- ret = RESOLVE_UNKNOWN;
- free(buf);
- return ret;
-}
-
-char *
-getusername(void)
-{
-#ifdef _WIN32
- static char buf[1024];
- DWORD size = sizeof(buf);
- buf[0] = '\0';
- GetUserName( buf, &size);
- return buf;
-#else /* not _WIN32 */
- struct passwd *pw = getpwuid(getuid());
- if ( pw == NULL )
- fatal("getpwuid() failed for uid: %d\n", getuid());
- return pw->pw_name;
-#endif /* not _WIN32 */
-}
-
-/* expect
- check STR is begin with substr with case-ignored comparison.
- Return 1 if matched, otherwise 0.
-*/
-int
-expect( char *str, char *substr)
-{
- int len = strlen(substr);
- while ( 0 < len-- ) {
- if ( toupper(*str) != toupper(*substr) )
- return 0; /* not matched */
- str++, substr++;
- }
- return 1; /* good, matched */
-}
-
-
-/** PARAMETER operation **/
-#define PARAMETER_FILE "/etc/connectrc"
-#define PARAMETER_DOTFILE ".connectrc"
-typedef struct {
- char* name;
- char* value;
-} PARAMETER_ITEM;
-PARAMETER_ITEM parameter_table[] = {
- { ENV_SOCKS_SERVER, NULL },
- { ENV_SOCKS5_SERVER, NULL },
- { ENV_SOCKS4_SERVER, NULL },
- { ENV_SOCKS_RESOLVE, NULL },
- { ENV_SOCKS5_RESOLVE, NULL },
- { ENV_SOCKS4_RESOLVE, NULL },
- { ENV_SOCKS5_USER, NULL },
- { ENV_SOCKS5_PASSWD, NULL },
- { ENV_SOCKS5_PASSWORD, NULL },
- { ENV_HTTP_PROXY, NULL },
- { ENV_HTTP_PROXY_USER, NULL },
- { ENV_HTTP_PROXY_PASSWORD, NULL },
- { ENV_CONNECT_USER, NULL },
- { ENV_CONNECT_PASSWORD, NULL },
- { ENV_SSH_ASKPASS, NULL },
- { ENV_SOCKS5_DIRECT, NULL },
- { ENV_SOCKS4_DIRECT, NULL },
- { ENV_SOCKS_DIRECT, NULL },
- { ENV_HTTP_DIRECT, NULL },
- { ENV_CONNECT_DIRECT, NULL },
- { ENV_SOCKS5_AUTH, NULL },
- { NULL, NULL }
-};
-
-PARAMETER_ITEM*
-find_parameter_item(const char* name)
-{
- int i;
- for( i = 0; parameter_table[i].name != NULL; i++ ){
- if ( strcmp(name, parameter_table[i].name) == 0 )
- return &parameter_table[i];
- }
- return NULL;
-}
-
-void
-read_parameter_file_1(const char* name)
-{
- FILE* f;
- int line;
- char lbuf[1025];
- f = fopen(name, "r");
- if( f ){
- debug("Reading parameter file(%s)\n", name);
- for ( line = 1; fgets(lbuf, 1024, f); line++ ) {
- char *p, *q, *param, *value;
- p = strchr(lbuf, '\n');
- if ( p == NULL )
- fatal("%s:%d: buffer overflow\n", name, line);
- *p = '\0';
- p = strchr(lbuf, '#');
- if ( p )
- *p = '\0';
- for ( p = lbuf; *p; p++ )
- if( *p != ' ' && *p != '\t' ) break;
- if ( *p == '\0' ) continue;
- param = p;
- p = strchr(p, '=');
- if ( p == NULL ) {
- error("%s:%d: missing equal sign\n", name, line);
- continue;
- }
- for ( q = p - 1; q >= lbuf; q-- )
- if ( *q != ' ' && *q != '\t' ) break;
- *++q = '\0';
- for ( ++p; *p; p++ )
- if ( *p != ' ' && *p != '\t' ) break;
- value = p;
- for ( ; *p; p++ );
- for ( p--; p >= lbuf; p-- )
- if ( *p != ' ' && *p != '\t' ) break;
- *++p = '\0';
- if ( param && value ) {
- PARAMETER_ITEM *item;
- item = find_parameter_item(param);
- if ( item == NULL ) {
- error("%s:%d: unknown parameter `%s'\n", name, line, param);
- continue;
- }
- item->value = strdup(value);
- debug("Parameter `%s' is set to `%s'\n", param, value);
- }
- }
- }
-}
-
-void
-read_parameter_file(void)
-{
-#if !defined(_WIN32) || defined(cygwin)
- char *name;
- struct passwd *pw;
-#endif
-
- read_parameter_file_1(PARAMETER_FILE);
-#if !defined(_WIN32) || defined(cygwin)
- pw = getpwuid(getuid());
- if ( pw == NULL )
- fatal("getpwuid() failed for uid: %d\n", getuid());
- name = xmalloc(strlen(pw->pw_dir) + strlen(PARAMETER_DOTFILE) + 2);
- strcpy(name, pw->pw_dir);
- strcat(name, "/" PARAMETER_DOTFILE);
- read_parameter_file_1(name);
- free(name);
-#endif /* _WIN32 */
-}
-
-char*
-getparam(const char* name)
-{
- char *value = getenv(name);
- if ( value == NULL ){
- PARAMETER_ITEM *item = find_parameter_item(name);
- if ( item != NULL )
- value = item->value;
- }
- return value;
-}
-
-
-/** DIRECT connection **/
-#define MAX_DIRECT_ADDR_LIST 256
-
-struct ADDRPAIR {
- struct in_addr addr;
- struct in_addr mask;
- char *name;
- int negative;
-};
-
-struct ADDRPAIR direct_addr_list[MAX_DIRECT_ADDR_LIST];
-int n_direct_addr_list = 0;
-
-void
-mask_addr (void *addr, void *mask, int addrlen)
-{
- char *a, *m;
- a = addr;
- m = mask;
- while ( 0 < addrlen-- )
- *a++ &= *m++;
-}
-
-int
-add_direct_addr (struct in_addr *addr, struct in_addr *mask, int negative)
-{
- struct in_addr iaddr;
- char *s;
- if ( MAX_DIRECT_ADDR_LIST <= n_direct_addr_list ) {
- error("direct address table is full!\n");
- return -1;
- }
- iaddr = *addr;
- mask_addr(&iaddr, mask, sizeof(iaddr));
- s = strdup(inet_ntoa(iaddr));
- debug("adding direct addr entry: %s%s/%s\n",
- negative? "!": "", s, inet_ntoa(*mask));
- free(s);
- memcpy( &direct_addr_list[n_direct_addr_list].addr,
- &iaddr, sizeof(iaddr));
- memcpy( &direct_addr_list[n_direct_addr_list].mask,
- mask, sizeof(*mask));
- direct_addr_list[n_direct_addr_list].name = NULL;
- direct_addr_list[n_direct_addr_list].negative = negative;
- n_direct_addr_list++;
- return 0;
-}
-
-
-/* add domain/host name entry to direct name table */
-int
-add_direct_host( const char *name, int negative)
-{
- if ( MAX_DIRECT_ADDR_LIST <= n_direct_addr_list ) {
- error("direct address table is full!\n");
- return -1;
- }
- if (*name == '*')
- name++;
- if (*name == '.')
- name++;
- debug("adding direct name entry: %s%s\n", negative? "!": "", name);
- direct_addr_list[n_direct_addr_list].name = downcase(strdup(name));
- direct_addr_list[n_direct_addr_list].negative = negative;
- n_direct_addr_list++;
- return 0;
-}
-
-
-int
-parse_addr_pair (const char *str, struct in_addr *addr, struct in_addr *mask)
-{
- /* NOTE: */
- /* Assume already be splitted by separator
- and formatted as folowing:
- 1) 12.34.56.789/255.255.255.0
- 2) 12.34.56.789/24
- 3) 12.34.56.
- All above generates same addr/mask pair 12.34.56.0 and 255.255.255.0
- */
- const char *ptr;
- u_char *dsta, *dstm;
- int i, n;
-
- assert( str != NULL );
- addr->s_addr = 0;
- mask->s_addr = 0;
- ptr = str;
- dsta = (u_char*)&addr->s_addr;
- dstm = (u_char*)&mask->s_addr;
- for (i=0; i<4; i++ ) {
- if ( *ptr == '\0' )
- break; /* case of format #3 */
- if ( !isdigit(*ptr) )
- return -1; /* format error: */
- *dsta++ = atoi( ptr );
- *dstm++ = 255; /* automatic mask for format #3 */
- while ( isdigit(*ptr) ) /* skip digits */
- ptr++;
- if ( *ptr == '.' )
- ptr++;
- else
- break;
- }
- /* At this point, *ptr points '/' or EOS ('\0') */
- if ( *ptr == '\0' )
- return 0; /* complete as format #3 */
- if ( *ptr != '/' )
- return -1; /* format error */
- /* Now parse mask for format #1 or #2 */
- ptr++;
- mask->s_addr = 0; /* clear automatic mask */
-
- if ( strchr( ptr, '.') ) {
- /* case of format #1 */
- dstm = (u_char*)&mask->s_addr;
- for (i=0; i<4; i++) {
- if ( !isdigit(*ptr) )
- return -1; /* format error: */
- *dstm++ = atoi(ptr);
- while ( isdigit(*ptr) ) /* skip digits */
- ptr++;
- if ( *ptr == '.' )
- ptr++;
- else
- break; /* from for loop */
- }
- /* complete as format #1 */
- } else {
- /* case of format #2 */
- if ( !isdigit(*ptr) )
- return -1; /* format error: */
- n = atoi(ptr);
- if ( n<0 || 32<n)
- return -1; /* format error */
- mask->s_addr = (n==0)? 0: htonl(((u_long)0xFFFFFFFF)<<(32-n));
- /* complete as format #1 */
- }
- return 0;
-}
-
-void
-initialize_direct_addr (void)
-{
- int negative;
- int n_entries;
- char *env = NULL, *beg, *next, *envkey = NULL;
- struct in_addr addr, mask;
-
- if ( relay_method == METHOD_SOCKS ){
- if ( socks_version == 5 )
- envkey = ENV_SOCKS5_DIRECT;
- else
- envkey = ENV_SOCKS4_DIRECT;
- env = getparam(envkey);
- if ( env == NULL )
- env = getparam(ENV_SOCKS_DIRECT);
- } else if ( relay_method == METHOD_HTTP ){
- env = getparam(ENV_HTTP_DIRECT);
- }
-
- if ( env == NULL )
- env = getparam(ENV_CONNECT_DIRECT);
-
- if ( env == NULL )
- return; /* no entry */
- debug("making direct addr list from: '%s'\n", env);
- env = strdup( env ); /* reallocate to modify */
- beg = next = env;
- n_entries = 0;
- do {
- if ( MAX_DIRECT_ADDR_LIST <= n_entries ) {
- error("too many entries in %s", envkey);
- break; /* from do loop */
- }
- next = strchr( beg, ',');
- if ( next != NULL )
- *next++ = '\0';
- addr.s_addr = 0;
- mask.s_addr = 0;
- if (*beg == '!') {
- negative = 1;
- beg++;
- } else
- negative = 0;
- if ( !parse_addr_pair( beg, &addr, &mask ) ) {
- add_direct_addr( &addr, &mask, negative );
- } else {
- add_direct_host( beg, negative );
- }
- if ( next != NULL )
- beg = next;
- } while ( next != NULL );
-
- free( env );
- return;
-}
-
-int
-cmp_addr (void *addr1, void *addr2, int addrlen)
-{
- return memcmp( addr1, addr2, addrlen );
-}
-
-int
-is_direct_address (const struct in_addr addr)
-{
- int i, neg;
- struct in_addr iaddr;
-
- /* Note: assume IPV4 address !! */
- for (i=0; i<n_direct_addr_list; i++ ) {
- if (direct_addr_list[i].name != NULL)
- continue; /* it's name entry */
- neg = direct_addr_list[i].negative;
- iaddr = addr;
- mask_addr( &iaddr, &direct_addr_list[i].mask,
- sizeof(struct in_addr));
- if (cmp_addr(&iaddr, &direct_addr_list[i].addr,
- sizeof(struct in_addr)) == 0) {
- char *a, *m;
- a = strdup(inet_ntoa(direct_addr_list[i].addr));
- m = strdup(inet_ntoa(direct_addr_list[i].mask));
- debug("match with: %s/%s%s\n", a, m, neg? " (negative)": "");
- free(a);
- free(m);
- return !neg? 1: 0;
- }
- }
- debug("not matched, addr to be relayed: %s\n", inet_ntoa(addr));
- return 0; /* not direct */
-}
-
-
-/* check s1 is ends with s2.
- return 1 if exact match or domain part match.
- return 0 if s1 is shorter than s2 or partial match.
- For example,
- ends_with("bar.com", "bar.com") => 1 (exact match)
- ends_with("foo.bar.com", "bar.com") => 1 (domain match)
- ends_with("foo.beebar.com", "bar.com") => 0 (partial match)
- ends_with("bar", "bar.com") => 0 (shorter)
- */
-domain_match(const char *s1, const char *s2)
-{
- int len1, len2;
- const char *tail1, *tail2;
- len1 = strlen(s1);
- len2 = strlen(s2);
- if (len1 < len2 || len1 == 0 || len2 == 0)
- return 0; /* not match */
- tail1 = s1 + len1;
- tail2 = s2 + len2;
- while (0 < len1 && 0 < len2) {
- if (*--tail1 != *--tail2)
- break; /* not match */
- len1--, len2--;
- }
- if (len2 != 0)
- return 0; /* not match */
- /* Now exact match, domain match or partial match.
- Return true if exact or domain match.
- Or continue checking. */
- if (tail1 == s1 || tail1[-1] == '.')
- return 1; /* match! */
- return 0; /* not match */
-}
-
-/* Check given NAME is ends with one of
- registered direct name entry.
- Return 1 if matched, or 0.
-*/
-int
-is_direct_name (const char *name)
-{
- int len, i;
- const char *tail;
- debug("checking %s is for direct?\n", name);
- name = downcase(strdup(name));
- len = strlen(name);
- if (len < 1)
- return 0; /* false */
- tail = &name[len];
- for (i=0; i<n_direct_addr_list; i++ ) {
- int dlen, neg;
- const char *dname;
- const char *n, *d;
- dname = direct_addr_list[i].name;
- if (dname == NULL)
- continue; /* it's addr/mask entry */
- neg = direct_addr_list[i].negative;
- if (domain_match(name, dname)) {
- debug("match with: %s%s\n", dname, neg? " (negative)": "");
- if (neg) {
- return 0; /* not direct */
- } else {
- return 1; /* direct*/
- }
- }
- }
- return 0; /* not matched */
-}
-
-/* check to connect to HOST directyly?
- return 1 if to be direct, 0 for else. */
-int
-check_direct(const char *host)
-{
- struct in_addr addr;
- addr.s_addr = inet_addr(host);
- if (addr.s_addr != INADDR_NONE) {
- /* case of IP address */
- if (is_direct_address(addr)) {
- debug("%s is for direct.\n", host);
- return 1; /* true */
- }
- } else {
- /* case of hostname */
- if (is_direct_name(host)) {
- debug("%s is for direct.\n", host);
- return 1; /* true */
- }
- }
- debug("%s is for not direct.\n", host);
- return 0; /* false */
-}
-
-
-/** TTY operation **/
-
-int intr_flag = 0;
-
-#ifndef _WIN32
-void
-intr_handler(int sig)
-{
- intr_flag = 1;
-}
-
-void
-tty_change_echo(int fd, int enable)
-{
- static struct termios ntio, otio; /* new/old termios */
- static sigset_t nset, oset; /* new/old sigset */
- static struct sigaction nsa, osa; /* new/old sigaction */
- static int disabled = 0;
-
- if ( disabled && enable ) {
- /* enable echo */
- tcsetattr(fd, TCSANOW, &otio);
- disabled = 0;
- /* resotore sigaction */
- sigprocmask(SIG_SETMASK, &oset, NULL);
- sigaction(SIGINT, &osa, NULL);
- if ( intr_flag != 0 ) {
- /* re-generate signal */
- kill(getpid(), SIGINT);
- sigemptyset(&nset);
- sigsuspend(&nset);
- intr_flag = 0;
- }
- } else if (!disabled && !enable) {
- /* set SIGINTR handler and break syscall on singal */
- sigemptyset(&nset);
- sigaddset(&nset, SIGTSTP);
- sigprocmask(SIG_BLOCK, &nset, &oset);
- intr_flag = 0;
- memset(&nsa, 0, sizeof(nsa));
- nsa.sa_handler = intr_handler;
- sigaction(SIGINT, &nsa, &osa);
- /* disable echo */
- if (tcgetattr(fd, &otio) == 0 && (otio.c_lflag & ECHO)) {
- disabled = 1;
- ntio = otio;
- ntio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
- (void) tcsetattr(fd, TCSANOW, &ntio);
- }
- }
-
- return;
-}
-
-#define TTY_NAME "/dev/tty"
-int
-tty_readpass( const char *prompt, char *buf, size_t size )
-{
- int tty, ret = 0;
-
- tty = open(TTY_NAME, O_RDWR);
- if ( tty < 0 ) {
- error("Unable to open %s\n", TTY_NAME);
- return -1; /* can't open tty */
- }
- if ( size <= 0 )
- return -1; /* no room */
- write(tty, prompt, strlen(prompt));
- buf[0] = '\0';
- tty_change_echo(tty, 0); /* disable echo */
- ret = read(tty,buf, size-1);
- tty_change_echo(tty, 1); /* restore */
- write(tty, "\n", 1); /* new line */
- close(tty);
- if ( strchr(buf,'\n') == NULL )
- return -1;
- if ( 0 < ret )
- buf[ret] = '\0';
- return ret;
-}
-
-#else /* _WIN32 */
-
-BOOL __stdcall
-w32_intr_handler(DWORD dwCtrlType)
-{
- if ( dwCtrlType == CTRL_C_EVENT ) {
- intr_flag = 1;
- return TRUE;
- } else {
- return FALSE;
- }
-}
-
-#define tty_readpass w32_tty_readpass
-int
-w32_tty_readpass( const char *prompt, char *buf, size_t size )
-{
- HANDLE in = CreateFile("CONIN$", GENERIC_READ|GENERIC_WRITE,
- 0, NULL, OPEN_EXISTING, 0, NULL);
- HANDLE out = CreateFile("CONOUT$", GENERIC_WRITE,
- 0, NULL, OPEN_EXISTING, 0, NULL);
- DWORD mode;
- DWORD ret, bytes;
-
- if (in == INVALID_HANDLE_VALUE || out == INVALID_HANDLE_VALUE)
- fatal("Cannot open console. (errno=%d)", GetLastError());
-
- WriteFile(out, prompt, strlen(prompt), &bytes, 0);
- SetConsoleCtrlHandler(w32_intr_handler, TRUE ); /* add handler */
- GetConsoleMode(in, &mode);
- SetConsoleMode(in, mode&~ENABLE_ECHO_INPUT); /* disable echo */
- ret = ReadFile(in, buf, size, &bytes, 0);
- SetConsoleMode(in, mode); /* enable echo */
- SetConsoleCtrlHandler( w32_intr_handler, FALSE ); /* remove handler */
- if ( intr_flag )
- GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0); /* re-signal */
- WriteFile(out,"\n", 1, &bytes, 0);
- CloseHandle(in);
- CloseHandle(out);
- return ret;
-}
-
-#endif /* _WIN32 */
-
-/*** User / Password ***/
-
-/* SOCKS5 and HTTP Proxy authentication may requires username and
- password. We ll give it via environment variable or tty.
- Username and password for authentication are decided by
- following rules:
-
- Username is taken from
- 1) server location spec (i.e. user@host:port)
- 2) environment variables (see tables.1)
- 3) system account name currently logged in.
-
- Table.1 Order of environment variables for username
-
- | SOCKS v5 | SOCKS v4 | HTTP proxy |
- --+-------------+-------------+-----------------+
- 1 | SOCKS45_USER | SOCKS4_USER | HTTP_PROXY_USER |
- --+-------------+-------------+ |
- 2 | SOCKS_USER | |
- --+---------------------------+-----------------+
- 3 | CONNECT_USER |
- --+---------------------------------------------+
-
- Password is taken from
- 1) by environment variables (see table.2)
- 2) by entering from tty.
-
- Table.2 Order of environment variables for password
-
- | SOCKS v5 | HTTP proxy |
- --+-----------------+---------------------+
- 1 | SOCKS5_PASSWD | |
- --+-----------------+ HTTP_PROXY_PASSWORD |
- 2 | SOCKS5_PASSWORD | |
- --+-----------------+---------------------+
- 3 | CONNECT_PASSWORD |
- --+---------------------------------------+
-
- Note: SOCKS5_PASSWD which is added in rev. 1.79
- to share value with NEC SOCKS implementation.
- */
-
-char *
-determine_relay_user ()
-{
- char *user = NULL;
- /* get username from environment variable, or system. */
- if (relay_method == METHOD_SOCKS) {
- if (user == NULL && socks_version == 5)
- user = getparam (ENV_SOCKS5_USER);
- if (user == NULL && socks_version == 4)
- user = getparam (ENV_SOCKS4_USER);
- if (user == NULL)
- user = getparam (ENV_SOCKS_USER);
- } else if (relay_method == METHOD_HTTP) {
- if (user == NULL)
- user = getparam (ENV_HTTP_PROXY_USER);
- }
- if (user == NULL)
- user = getparam (ENV_CONNECT_USER);
- /* determine relay user by system call if not yet. */
- if (user == NULL)
- user = getusername();
- return user;
-}
-
-char *
-determine_relay_password ()
-{
- char *pass = NULL;
- if (pass == NULL && relay_method == METHOD_HTTP)
- pass = getparam(ENV_HTTP_PROXY_PASSWORD);
- if (pass == NULL && relay_method == METHOD_SOCKS)
- pass = getparam(ENV_SOCKS5_PASSWD);
- if (pass == NULL && relay_method == METHOD_SOCKS)
- pass = getparam(ENV_SOCKS5_PASSWORD);
- if (pass == NULL)
- pass = getparam(ENV_CONNECT_PASSWORD);
- return pass;
-}
-
-
-/*** network operations ***/
-
-
-/* set_relay()
- Determine relay informations:
- method, host, port, and username.
- 1st arg, METHOD should be METHOD_xxx.
- 2nd arg, SPEC is hostname or hostname:port or user@hostame:port.
- hostname is domain name or dot notation.
- If port is omitted, use 80 for METHOD_HTTP method,
- use 1080 for METHOD_SOCKS method.
- Username is also able to given by 3rd. format.
- 2nd argument SPEC can be NULL. if NULL, use environment variable.
- */
-int
-set_relay( int method, char *spec )
-{
- char *buf, *sep, *resolve;
-
- relay_method = method;
-
- read_parameter_file();
- initialize_direct_addr();
- if (n_direct_addr_list == 0) {
- debug ("No direct address are specified.\n");
- } else {
- debug ("%d direct address entries.\n", n_direct_addr_list);
- }
-
- switch ( method ) {
- case METHOD_DIRECT:
- return -1; /* nothing to do */
-
- case METHOD_SOCKS:
- if ( spec == NULL ) {
- switch ( socks_version ) {
- case 5:
- spec = getparam(ENV_SOCKS5_SERVER);
- break;
- case 4:
- spec = getparam(ENV_SOCKS4_SERVER);
- break;
- }
- }
- if ( spec == NULL )
- spec = getparam(ENV_SOCKS_SERVER);
-
- if ( spec == NULL )
- fatal("Failed to determine SOCKS server.\n");
- relay_port = 1080; /* set default first */
-
- /* determine resolve method */
- if ( socks_resolve == RESOLVE_UNKNOWN ) {
- if ( ((socks_version == 5) &&
- ((resolve = getparam(ENV_SOCKS5_RESOLVE)) != NULL)) ||
- ((socks_version == 4) &&
- ((resolve = getparam(ENV_SOCKS4_RESOLVE)) != NULL)) ||
- ((resolve = getparam(ENV_SOCKS_RESOLVE)) != NULL) ) {
- socks_resolve = lookup_resolve( resolve );
- if ( socks_resolve == RESOLVE_UNKNOWN )
- fatal("Invalid resolve method: %s\n", resolve);
- } else {
- /* default */
- if ( socks_version == 5 )
- socks_resolve = RESOLVE_REMOTE;
- else
- socks_resolve = RESOLVE_LOCAL;
- }
- }
- break;
-
- case METHOD_HTTP:
- if ( spec == NULL )
- spec = getparam(ENV_HTTP_PROXY);
- if ( spec == NULL )
- fatal("You must specify http proxy server\n");
- relay_port = 80; /* set default first */
- break;
- case METHOD_TELNET:
- if ( spec == NULL )
- spec = getparam(ENV_TELNET_PROXY);
- if ( spec == NULL )
- fatal("You must specify telnet proxy server\n");
- relay_port = 23; /* set default first */
- }
-
- if (expect( spec, HTTP_PROXY_PREFIX)) {
- /* URL format like: "http://server:port/" */
- /* extract server:port part */
- buf = strdup( spec + strlen(HTTP_PROXY_PREFIX));
- buf[strcspn(buf, "/")] = '\0';
- } else {
- /* assume spec is aready "server:port" format */
- buf = strdup( spec );
- }
- spec = buf;
-
- /* check username in spec */
- sep = strchr( spec, '@' );
- if ( sep != NULL ) {
- *sep = '\0';
- relay_user = strdup( spec );
- spec = sep +1;
- }
- if (relay_user == NULL)
- relay_user = determine_relay_user();
-
- /* split out hostname and port number from spec */
- sep = strchr(spec,':');
- if ( sep == NULL ) {
- /* hostname only, port is already set as default */
- relay_host = strdup( spec );
- } else {
- /* hostname and port */
- relay_port = atoi(sep+1);
- *sep = '\0';
- relay_host = strdup( spec );
- }
- free(buf);
- return 0;
-}
-
-
-u_short
-resolve_port( const char *service )
-{
- int port;
- if ( service[strspn (service, digits)] == '\0' ) {
- /* all digits, port number */
- port = atoi(service);
- } else {
- /* treat as service name */
- struct servent *ent;
- ent = getservbyname( service, NULL );
- if ( ent == NULL ) {
- debug("Unknown service, '%s'\n", service);
- port = 0;
- } else {
- port = ntohs(ent->s_port);
- debug("service: %s => %d\n", service, port);
- }
- }
- return (u_short)port;
-}
-
-void
-make_revstr(void)
-{
- char *ptr;
- size_t len;
- ptr = strstr(rcs_revstr, ": ");
- if (!ptr) {
- revstr = strdup("unknown");
- return;
- }
- ptr += 2;
- /* assume subversion's keyword expansion like "Revision: 96". */
- minor_version = atoi(ptr);
- revstr = xmalloc(20);
- snprintf(revstr, 20, "%d.%d", major_version, minor_version);
-}
-
-int
-getarg( int argc, char **argv )
-{
- int err = 0;
- char *ptr, *server = (char*)NULL;
- int method = METHOD_DIRECT;
-
- progname = *argv;
- argc--, argv++;
-
- /* check optinos */
- while ( (0 < argc) && (**argv == '-') ) {
- ptr = *argv + 1;
- while ( *ptr ) {
- switch ( *ptr ) {
- case 's': /* use SOCKS */
- method = METHOD_SOCKS;
- break;
-
- case 'n': /* no proxy */
- method = METHOD_DIRECT;
- break;
-
- case 'h': /* use http-proxy */
- method = METHOD_HTTP;
- break;
- case 't':
- method = METHOD_TELNET;
- break;
-
- case 'S': /* specify SOCKS server */
- if ( 1 < argc ) {
- argv++, argc--;
- method = METHOD_SOCKS;
- server = *argv;
- } else {
- error("option '-%c' needs argument.\n", *ptr);
- err++;
- }
- break;
-
- case 'H': /* specify http-proxy server */
- if ( 1 < argc ) {
- argv++, argc--;
- method = METHOD_HTTP;
- server = *argv;
- } else {
- error("option '-%c' needs argument.\n", *ptr);
- err++;
- }
- break;
- case 'T': /* specify telnet proxy server */
- if ( 1 < argc ) {
- argv++, argc--;
- method = METHOD_TELNET;
- server = *argv;
- } else {
- error("option '-%c' needs argument.\n", *ptr);
- err++;
- }
- break;
-
- case 'c':
- if (1 < argc) {
- argv++, argc--;
- telnet_command = *argv;
- } else {
- error("option '%c' needs argument.\n", *ptr);
- err++;
- }
- break;
-
- case 'P':
- f_hold_session = 1;
- /* without break */
- case 'p': /* specify port to forward */
- if ( 1 < argc ) {
- argv++, argc--;
- local_type = LOCAL_SOCKET;
- local_port = resolve_port(*argv);
- } else {
- error("option '-%c' needs argument.\n", *ptr);
- err++;
- }
- break;
-
-#ifndef _WIN32
- case 'w':
- if ( 1 < argc ) {
- argv++, argc--;
- connect_timeout = atoi(*argv);
- } else {
- error("option '-%c' needs argument.\n", *ptr);
- err++;
- }
- break;
-#endif /* not _WIN32 */
-
- case '4':
- socks_version = 4;
- break;
-
- case '5':
- socks_version = 5;
- break;
-
- case 'a':
- if ( 1 < argc ) {
- argv++, argc--;
- socks5_auth = *argv;
- } else {
- error("option '-%c' needs argument.\n", *ptr);
- err++;
- }
- break;
-
- case 'R': /* specify resolve method */
- if ( 1 < argc ) {
- argv++, argc--;
- socks_resolve = lookup_resolve( *argv );
- } else {
- error("option '-%c' needs argument.\n", *ptr);
- err++;
- }
- break;
-
- case 'V': /* print version */
- fprintf(stderr, "%s\nVersion %s\n", progdesc, revstr);
- exit(0);
-
- case 'd': /* debug mode */
- f_debug++;
- break;
-
- default:
- error("unknown option '-%c'\n", *ptr);
- err++;
- }
- ptr++;
- }
- argc--, argv++;
- }
-
- /* check error */
- if ( 0 < err )
- goto quit;
-
- set_relay( method, server );
-
- /* check destination HOST (MUST) */
- if ( argc == 0 ) {
- fprintf(stderr, "%s\nVersion %s\n", progdesc, revstr);
- fprintf(stderr, usage, progname);
- exit(0);
- }
- dest_host = argv[0];
- /* decide port or service name from programname or argument */
- if ( ((ptr=strrchr( progname, '/' )) != NULL) ||
- ((ptr=strchr( progname, '\\')) != NULL) )
- ptr++;
- else
- ptr = progname;
- if ( dest_port == 0 ) {
- /* accept only if -P is not specified. */
- if ( 1 < argc ) {
- /* get port number from argument (prior to progname) */
- /* NOTE: This way is for cvs ext method. */
- dest_port = resolve_port(argv[1]);
- } else if ( strncmp( ptr, "connect-", 8) == 0 ) {
- /* decide port number from program name */
- char *str = strdup( ptr+8 );
- str[strcspn( str, "." )] = '\0';
- dest_port = resolve_port(str);
- free(str);
- }
- }
- /* check port number */
- if ( dest_port <= 0 ) {
- error( "You must specify the destination port correctly.\n");
- err++;
- goto quit;
- }
- if ( (relay_method != METHOD_DIRECT) && (relay_port <= 0) ) {
- error("Invalid relay port: %d\n", dest_port);
- err++;
- goto quit;
- }
-
-quit:
- /* report for debugging */
- debug("relay_method = %s (%d)\n",
- method_names[relay_method], relay_method);
- if ( relay_method != METHOD_DIRECT ) {
- debug("relay_host=%s\n", relay_host);
- debug("relay_port=%d\n", relay_port);
- debug("relay_user=%s\n", relay_user);
- }
- if ( relay_method == METHOD_SOCKS ) {
- debug("socks_version=%d\n", socks_version);
- debug("socks_resolve=%s (%d)\n",
- resolve_names[socks_resolve], socks_resolve);
- }
- debug("local_type=%s\n", local_type_names[local_type]);
- if ( local_type == LOCAL_SOCKET ) {
- debug("local_port=%d\n", local_port);
- if (f_hold_session)
- debug (" with holding remote session.\n");
- }
- debug("dest_host=%s\n", dest_host);
- debug("dest_port=%d\n", dest_port);
- if ( 0 < err ) {
- fprintf(stderr, usage, progname);
- exit(1);
- }
- return 0;
-}
-
-#ifndef _WIN32
-/* Time-out feature is not allowed for Win32 native compilers. */
-/* MSVC and Borland C cannot but Cygwin and UNIXes can. */
-
-/* timeout signal hander */
-void
-sig_timeout(void)
-{
- signal( SIGALRM, SIG_IGN );
- alarm( 0 );
- error( "timed out\n" );
- exit(1);
-}
-
-/* set timeout param = seconds, 0 clears */
-void
-set_timeout(int timeout)
-{
- /* This feature is allowed for UNIX or cygwin environments, currently */
- if ( timeout == 0 ) {
- debug( "clearing timeout\n" );
- signal( SIGALRM, SIG_IGN );
- alarm( 0 );
- } else {
- debug( "setting timeout: %d seconds\n", timeout );
- signal(SIGALRM, (void *)sig_timeout);
- alarm( timeout );
- }
-}
-#endif
-
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
-void
-switch_ns (struct sockaddr_in *ns)
-{
- res_init();
- memcpy (&_res.nsaddr_list[0], ns, sizeof(*ns));
- _res.nscount = 1;
- debug("Using nameserver at %s\n", inet_ntoa(ns->sin_addr));
-}
-#endif /* !_WIN32 && !__CYGWIN32__ */
-
-/* TODO: IPv6
- TODO: fallback if askpass execution failed.
- */
-
-int
-local_resolve (const char *host, struct sockaddr_in *addr)
-{
- struct hostent *ent;
- if ( strspn(host, dotdigits) == strlen(host) ) {
- /* given by IPv4 address */
- addr->sin_family = AF_INET;
- addr->sin_addr.s_addr = inet_addr(host);
- } else {
- debug("resolving host by name: %s\n", host);
- ent = gethostbyname (host);
- if ( ent ) {
- memcpy (&addr->sin_addr, ent->h_addr, ent->h_length);
- addr->sin_family = ent->h_addrtype;
- debug("resolved: %s (%s)\n",
- host, inet_ntoa(addr->sin_addr));
- } else {
- debug("failed to resolve locally.\n");
- return -1; /* failed */
- }
- }
- return 0; /* good */
-}
-
-int
-open_connection( const char *host, u_short port )
-{
- SOCKET s;
- struct sockaddr_in saddr;
-
- /* resolve address of proxy or direct target */
- if (local_resolve (host, &saddr) < 0) {
- error("can't resolve hostname: %s\n", host);
- return SOCKET_ERROR;
- }
- saddr.sin_port = htons(port);
-
- debug("connecting to %s:%u\n", inet_ntoa(saddr.sin_addr), port);
- s = socket( AF_INET, SOCK_STREAM, 0 );
- if ( connect( s, (struct sockaddr *)&saddr, sizeof(saddr))
- == SOCKET_ERROR) {
- debug( "connect() failed.\n");
- return SOCKET_ERROR;
- }
- return s;
-}
-
-void
-report_text( char *prefix, char *buf )
-{
- static char work[1024];
- char *tmp;
-
- if ( !f_debug )
- return;
- if ( !f_report )
- return; /* don't report */
- debug("%s \"", prefix);
- while ( *buf ) {
- memset( work, 0, sizeof(work));
- tmp = work;
- while ( *buf && ((tmp-work) < (int)sizeof(work)-5) ) {
- switch ( *buf ) {
- case '\t': *tmp++ = '\\'; *tmp++ = 't'; break;
- case '\r': *tmp++ = '\\'; *tmp++ = 'r'; break;
- case '\n': *tmp++ = '\\'; *tmp++ = 'n'; break;
- case '\\': *tmp++ = '\\'; *tmp++ = '\\'; break;
- default:
- if ( isprint(*buf) ) {
- *tmp++ = *buf;
- } else {
- int consumed = tmp - work;
- snprintf( tmp, sizeof(work)-consumed,
- "\\x%02X", (unsigned char)*buf);
- tmp += strlen(tmp);
- }
- }
- buf++;
- *tmp = '\0';
- }
- debug_("%s", work);
- }
-
- debug_("\"\n");
-}
-
-
-void
-report_bytes( char *prefix, char *buf, int len )
-{
- if ( ! f_debug )
- return;
- debug( "%s", prefix );
- while ( 0 < len ) {
- fprintf( stderr, " %02x", *(unsigned char *)buf);
- buf++;
- len--;
- }
- fprintf(stderr, "\n");
- return;
-}
-
-int
-atomic_out( SOCKET s, char *buf, int size )
-{
- int ret, len;
-
- assert( buf != NULL );
- assert( 0<=size );
- /* do atomic out */
- ret = 0;
- while ( 0 < size ) {
- len = send( s, buf+ret, size, 0 );
- if ( len == -1 )
- fatal("atomic_out() failed to send(), %d\n", socket_errno());
- ret += len;
- size -= len;
- }
- if (!f_report) {
- debug("atomic_out() [some bytes]\n");
- debug(">>> xx xx xx xx ...\n");
- } else {
- debug("atomic_out() [%d bytes]\n", ret);
- report_bytes(">>>", buf, ret);
- }
- return ret;
-}
-
-int
-atomic_in( SOCKET s, char *buf, int size )
-{
- int ret, len;
-
- assert( buf != NULL );
- assert( 0<=size );
-
- /* do atomic in */
- ret = 0;
- while ( 0 < size ) {
- len = recv( s, buf+ret, size, 0 );
- if ( len == -1 ) {
- fatal("atomic_in() failed to recv(), %d\n", socket_errno());
- } else if ( len == 0 ) {
- fatal( "Connection closed by peer.\n");
- }
- ret += len;
- size -= len;
- }
- if (!f_report) {
- debug("atomic_in() [some bytes]\n");
- debug("<<< xx xx xx xx ...\n");
- } else {
- debug("atomic_in() [%d bytes]\n", ret);
- report_bytes("<<<", buf, ret);
- }
- return ret;
-}
-
-int
-line_input( SOCKET s, char *buf, int size )
-{
- char *dst = buf;
- if ( size == 0 )
- return 0; /* no error */
- size--;
- while ( 0 < size ) {
- switch ( recv( s, dst, 1, 0) ) { /* recv one-by-one */
- case SOCKET_ERROR:
- error("recv() error\n");
- return -1; /* error */
- case 0:
- size = 0; /* end of stream */
- break;
- default:
- /* continue reading until last 1 char is EOL? */
- if ( *dst == '\n' ) {
- /* finished */
- size = 0;
- } else {
- /* more... */
- size--;
- }
- dst++;
- }
- }
- *dst = '\0';
- report_text( "<<<", buf);
- return 0;
-}
-
-/* cut_token()
- Span token in given string STR until char in DELIM is appeared.
- Then replace contiguous DELIMS with '\0' for string termination
- and returns next pointer.
- If no next token, return NULL.
-*/
-char *
-cut_token( char *str, char *delim)
-{
- char *ptr = str + strcspn(str, delim);
- char *end = ptr + strspn(ptr, delim);
- if ( ptr == str )
- return NULL;
- while ( ptr < end )
- *ptr++ = '\0';
- return ptr;
-}
-
-const char *
-lookup(int num, LOOKUP_ITEM *items)
-{
- int i = 0;
- while (0 <= items[i].num) {
- if (items[i].num == num)
- return items[i].str;
- i++;
- }
- return "(unknown)";
-}
-
-/* readpass()
- password input routine
- Use ssh-askpass (same mechanism to OpenSSH)
-*/
-char *
-readpass( const char* prompt, ...)
-{
- static char buf[1000]; /* XXX, don't be fix length */
- va_list args;
- va_start(args, prompt);
- vsnprintf(buf, sizeof(buf), prompt, args);
- va_end(args);
-
- if ( getparam(ENV_SSH_ASKPASS)
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
- && getenv("DISPLAY")
-#endif /* not _WIN32 && not __CYGWIN32__ */
- ) {
- /* use ssh-askpass to get password */
- FILE *fp;
- char *askpass = getparam(ENV_SSH_ASKPASS), *cmd;
- int cmd_size = strlen(askpass) +1 +1 +strlen(buf) +1 +1;
- cmd = xmalloc(cmd_size);
- snprintf(cmd, cmd_size, "%s \"%s\"", askpass, buf);
- fp = popen(cmd, "r");
- free(cmd);
- if ( fp == NULL )
- return NULL; /* fail */
- buf[0] = '\0';
- if (fgets(buf, sizeof(buf), fp) == NULL)
- return NULL; /* fail */
- fclose(fp);
- } else {
- tty_readpass( buf, buf, sizeof(buf));
- }
- buf[strcspn(buf, "\r\n")] = '\0';
- return buf;
-}
-
-static int
-socks5_do_auth_userpass( int s )
-{
- unsigned char buf[1024], *ptr;
- char *pass = NULL;
- int len;
-
- /* do User/Password authentication. */
- /* This feature requires username and password from
- command line argument or environment variable,
- or terminal. */
- if (relay_user == NULL)
- fatal("cannot determine user name.\n");
-
- /* get password from environment variable if exists. */
- if ((pass=determine_relay_password()) == NULL &&
- (pass=readpass("Enter SOCKS5 password for %s@%s: ",
- relay_user, relay_host)) == NULL)
- fatal("Cannot get password for user: %s\n", relay_user);
-
- /* make authentication packet */
- ptr = buf;
- PUT_BYTE( ptr++, 1 ); /* subnegotiation ver.: 1 */
- len = strlen( relay_user ); /* ULEN and UNAME */
- PUT_BYTE( ptr++, len );
- strcpy( ptr, relay_user );
- ptr += len;
- len = strlen( pass ); /* PLEN and PASSWD */
- PUT_BYTE( ptr++, strlen(pass));
- strcpy( ptr, pass );
- ptr += len;
- memset (pass, 0, strlen(pass)); /* erase password */
-
- /* send it and get answer */
- f_report = 0;
- atomic_out( s, buf, ptr-buf );
- f_report = 1;
- atomic_in( s, buf, 2 );
-
- /* check status */
- if ( buf[1] == 0 )
- return 0; /* success */
- else
- return -1; /* fail */
-}
-
-static const char *
-socks5_getauthname( int auth )
-{
- switch ( auth ) {
- case SOCKS5_AUTH_REJECT: return "REJECTED";
- case SOCKS5_AUTH_NOAUTH: return "NO-AUTH";
- case SOCKS5_AUTH_GSSAPI: return "GSSAPI";
- case SOCKS5_AUTH_USERPASS: return "USERPASS";
- case SOCKS5_AUTH_CHAP: return "CHAP";
- case SOCKS5_AUTH_EAP: return "EAP";
- case SOCKS5_AUTH_MAF: return "MAF";
- default: return "(unknown)";
- }
-}
-
-typedef struct {
- char* name;
- unsigned char auth;
-} AUTH_METHOD_ITEM;
-
-AUTH_METHOD_ITEM socks5_auth_table[] = {
- { "none", SOCKS5_AUTH_NOAUTH },
- { "gssapi", SOCKS5_AUTH_GSSAPI },
- { "userpass", SOCKS5_AUTH_USERPASS },
- { "chap", SOCKS5_AUTH_CHAP },
- { NULL, -1 },
-};
-
-int
-socks5_auth_parse_1(char *start, char *end){
- int i, len;
- for ( ; *start; start++ )
- if ( *start != ' ' && *start != '\t') break;
- for ( end--; end >= start; end-- ) {
- if ( *end != ' ' && *end != '\t'){
- end++;
- break;
- }
- }
- len = end - start;
- for ( i = 0; socks5_auth_table[i].name != NULL; i++ ){
- if ( strncmp(start, socks5_auth_table[i].name, len) == 0) {
- return socks5_auth_table[i].auth;
- }
- }
- fatal("Unknown auth method: %s\n", start);
- return -1;
-}
-
-int
-socks5_auth_parse(char *start, unsigned char *auth_list, int max_auth){
- char *end;
- int i = 0;
- while ( i < max_auth ) {
- end = strchr(start, ',');
- if (*start && end) {
- auth_list[i++] = socks5_auth_parse_1(start, end);
- start = ++end;
- } else {
- break;
- }
- }
- if ( *start && ( i < max_auth ) ){
- for( end = start; *end; end++ );
- auth_list[i++] = socks5_auth_parse_1(start, end);
- } else {
- fatal("Too much auth method.\n");
- }
- return i;
-}
-
-/* begin SOCKS5 relaying
- And no authentication is supported.
- */
-int
-begin_socks5_relay( SOCKET s )
-{
- unsigned char buf[256], *ptr, *env = socks5_auth;
- unsigned char n_auth = 0; unsigned char auth_list[10], auth_method;
- int len, auth_result, i;
-
- debug( "begin_socks_relay()\n");
-
- /* request authentication */
- ptr = buf;
- PUT_BYTE( ptr++, 5); /* SOCKS version (5) */
-
- if ( env == NULL )
- env = getparam(ENV_SOCKS5_AUTH);
- if ( env == NULL ) {
- /* add no-auth authentication */
- auth_list[n_auth++] = SOCKS5_AUTH_NOAUTH;
- /* add user/pass authentication */
- auth_list[n_auth++] = SOCKS5_AUTH_USERPASS;
- } else {
- n_auth = socks5_auth_parse(env, auth_list, 10);
- }
- PUT_BYTE( ptr++, n_auth); /* num auth */
- for (i=0; i<n_auth; i++) {
- debug("available auth method[%d] = %s (0x%02x)\n",
- i, socks5_getauthname(auth_list[i]), auth_list[i]);
- PUT_BYTE( ptr++, auth_list[i]); /* authentications */
- }
- atomic_out( s, buf, ptr-buf ); /* send requst */
- atomic_in( s, buf, 2 ); /* recv response */
- if ( (buf[0] != 5) || /* ver5 response */
- (buf[1] == 0xFF) ) { /* check auth method */
- error("No auth method accepted.\n");
- return -1;
- }
- auth_method = buf[1];
-
- debug("auth method: %s\n", socks5_getauthname(auth_method));
-
- switch ( auth_method ) {
- case SOCKS5_AUTH_REJECT:
- error("No acceptable authentication method\n");
- return -1; /* fail */
-
- case SOCKS5_AUTH_NOAUTH:
- /* nothing to do */
- auth_result = 0;
- break;
-
- case SOCKS5_AUTH_USERPASS:
- auth_result = socks5_do_auth_userpass(s);
- break;
-
- default:
- error("Unsupported authentication method: %s\n",
- socks5_getauthname( auth_method ));
- return -1; /* fail */
- }
- if ( auth_result != 0 ) {
- error("Authentication failed.\n");
- return -1;
- }
- /* request to connect */
- ptr = buf;
- PUT_BYTE( ptr++, 5); /* SOCKS version (5) */
- PUT_BYTE( ptr++, 1); /* CMD: CONNECT */
- PUT_BYTE( ptr++, 0); /* FLG: 0 */
- if ( dest_addr.sin_addr.s_addr == 0 ) {
- /* resolved by SOCKS server */
- PUT_BYTE( ptr++, 3); /* ATYP: DOMAINNAME */
- len = strlen(dest_host);
- PUT_BYTE( ptr++, len); /* DST.ADDR (len) */
- memcpy( ptr, dest_host, len ); /* (hostname) */
- ptr += len;
- } else {
- /* resolved localy */
- PUT_BYTE( ptr++, 1 ); /* ATYP: IPv4 */
- memcpy( ptr, &dest_addr.sin_addr.s_addr, sizeof(dest_addr.sin_addr));
- ptr += sizeof(dest_addr.sin_addr);
- }
- PUT_BYTE( ptr++, dest_port>>8); /* DST.PORT */
- PUT_BYTE( ptr++, dest_port&0xFF);
- atomic_out( s, buf, ptr-buf); /* send request */
- atomic_in( s, buf, 4 ); /* recv response */
- if ( (buf[1] != SOCKS5_REP_SUCCEEDED) ) { /* check reply code */
- error("Got error response from SOCKS server: %d (%s).\n",
- buf[1], lookup(buf[1], socks5_rep_names));
- return -1;
- }
- ptr = buf + 4;
- switch ( buf[3] ) { /* case by ATYP */
- case 1: /* IP v4 ADDR*/
- atomic_in( s, ptr, 4+2 ); /* recv IPv4 addr and port */
- break;
- case 3: /* DOMAINNAME */
- atomic_in( s, ptr, 1 ); /* recv name and port */
- atomic_in( s, ptr+1, *(unsigned char*)ptr + 2);
- break;
- case 4: /* IP v6 ADDR */
- atomic_in( s, ptr, 16+2 ); /* recv IPv6 addr and port */
- break;
- }
-
- /* Conguraturation, connected via SOCKS5 server! */
- return 0;
-}
-
-/* begin SOCKS protocol 4 relaying
- And no authentication is supported.
-
- There's SOCKS protocol version 4 and 4a. Protocol version
- 4a has capability to resolve hostname by SOCKS server, so
- we don't need resolving IP address of destination host on
- local machine.
-
- Environment variable SOCKS_RESOLVE directs how to resolve
- IP addess. There's 3 keywords allowed; "local", "remote"
- and "both" (case insensitive). Keyword "local" means taht
- target host name is resolved by localhost resolver
- (usualy with gethostbyname()), "remote" means by remote
- SOCKS server, "both" means to try resolving by localhost
- then remote.
-
- SOCKS4 protocol and authentication of SOCKS5 protocol
- requires user name on connect request.
- User name is determined by following method.
-
- 1. If server spec has user@hostname:port format then
- user part is used for this SOCKS server.
-
- 2. Get user name from environment variable LOGNAME, USER
- (in this order).
-
-*/
-int
-begin_socks4_relay( SOCKET s )
-{
- unsigned char buf[256], *ptr;
-
- debug( "begin_socks_relay()\n");
-
- /* make connect request packet
- protocol v4:
- VN:1, CD:1, PORT:2, ADDR:4, USER:n, NULL:1
- protocol v4a:
- VN:1, CD:1, PORT:2, DUMMY:4, USER:n, NULL:1, HOSTNAME:n, NULL:1
- */
- ptr = buf;
- PUT_BYTE( ptr++, 4); /* protocol version (4) */
- PUT_BYTE( ptr++, 1); /* CONNECT command */
- PUT_BYTE( ptr++, dest_port>>8); /* destination Port */
- PUT_BYTE( ptr++, dest_port&0xFF);
- /* destination IP */
- memcpy(ptr, &dest_addr.sin_addr, sizeof(dest_addr.sin_addr));
- ptr += sizeof(dest_addr.sin_addr);
- if ( dest_addr.sin_addr.s_addr == 0 )
- *(ptr-1) = 1; /* fake, protocol 4a */
- /* username */
- if (relay_user == NULL)
- fatal( "Cannot determine user name.\n");
- strcpy( ptr, relay_user );
- ptr += strlen( relay_user ) +1;
- /* destination host name (for protocol 4a) */
- if ( (socks_version == 4) && (dest_addr.sin_addr.s_addr == 0)) {
- strcpy( ptr, dest_host );
- ptr += strlen( dest_host ) +1;
- }
- /* send command and get response
- response is: VN:1, CD:1, PORT:2, ADDR:4 */
- atomic_out( s, buf, ptr-buf); /* send request */
- atomic_in( s, buf, 8 ); /* recv response */
- if ( (buf[1] != SOCKS4_REP_SUCCEEDED) ) { /* check reply code */
- error("Got error response: %d: '%s'.\n",
- buf[1], lookup(buf[1], socks4_rep_names));
- return -1; /* failed */
- }
-
- /* Conguraturation, connected via SOCKS4 server! */
- return 0;
-}
-
-int
-sendf(SOCKET s, const char *fmt,...)
-{
- static char buf[10240]; /* xxx, enough? */
-
- va_list args;
- va_start( args, fmt );
- vsnprintf( buf, sizeof(buf), fmt, args );
- va_end( args );
-
- report_text(">>>", buf);
- if ( send(s, buf, strlen(buf), 0) == SOCKET_ERROR ) {
- debug("failed to send http request. errno=%d\n", socket_errno());
- return -1;
- }
- return 0;
-}
-
-const char *base64_table =
-"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-char *
-make_base64_string(const char *str)
-{
- static char *buf;
- unsigned char *src;
- char *dst;
- int bits, data, src_len, dst_len;
- /* make base64 string */
- src_len = strlen(str);
- dst_len = (src_len+2)/3*4;
- buf = xmalloc(dst_len+1);
- bits = data = 0;
- src = (unsigned char *)str;
- dst = (unsigned char *)buf;
- while ( dst_len-- ) {
- if ( bits < 6 ) {
- data = (data << 8) | *src;
- bits += 8;
- if ( *src != 0 )
- src++;
- }
- *dst++ = base64_table[0x3F & (data >> (bits-6))];
- bits -= 6;
- }
- *dst = '\0';
- /* fix-up tail padding */
- switch ( src_len%3 ) {
- case 1:
- *--dst = '=';
- case 2:
- *--dst = '=';
- }
- return buf;
-}
-
-
-int
-basic_auth (SOCKET s)
-{
- char *userpass;
- char *cred;
- const char *user = relay_user;
- char *pass = NULL;
- int len, ret;
-
- /* Get username/password for authentication */
- if (user == NULL)
- fatal("Cannot decide username for proxy authentication.");
- if ((pass = determine_relay_password ()) == NULL &&
- (pass = readpass("Enter proxy authentication password for %s@%s: ",
- relay_user, relay_host)) == NULL)
- fatal("Cannot decide password for proxy authentication.");
-
- len = strlen(user)+strlen(pass)+1;
- userpass = xmalloc(len+1);
- snprintf(userpass, len+1, "%s:%s", user, pass);
- memset (pass, 0, strlen(pass));
- cred = make_base64_string(userpass);
- memset (userpass, 0, len);
-
- f_report = 0; /* don't report for security */
- ret = sendf(s, "Proxy-Authorization: Basic %s\r\n", cred);
- f_report = 1;
- report_text(">>>", "Proxy-Authorization: Basic xxxxx\r\n");
-
- memset(cred, 0, strlen(cred));
- free(cred);
-
- return ret;
-}
-
-/* begin relaying via HTTP proxy
- Directs CONNECT method to proxy server to connect to
- destination host (and port). It may not be allowed on your
- proxy server.
- */
-int
-begin_http_relay( SOCKET s )
-{
- char buf[1024];
- int result;
- char *auth_what;
-
- debug("begin_http_relay()\n");
-
- if (sendf(s,"CONNECT %s:%d HTTP/1.0\r\n", dest_host, dest_port) < 0)
- return START_ERROR;
- if (proxy_auth_type == PROXY_AUTH_BASIC && basic_auth (s) < 0)
- return START_ERROR;
- if (sendf(s,"\r\n") < 0)
- return START_ERROR;
-
- /* get response */
- if ( line_input(s, buf, sizeof(buf)) < 0 ) {
- debug("failed to read http response.\n");
- return START_ERROR;
- }
-
- /* check status */
- if (!strchr(buf, ' ')) {
- error ("Unexpected http response: '%s'.\n", buf);
- return START_ERROR;
- }
- result = atoi(strchr(buf,' '));
-
- switch ( result ) {
- case 200:
- /* Conguraturation, connected via http proxy server! */
- debug("connected, start user session.\n");
- break;
- case 302: /* redirect */
- do {
- if (line_input(s, buf, sizeof(buf)))
- break;
- downcase(buf);
- if (expect(buf, "Location: ")) {
- relay_host = cut_token(buf, "//");
- cut_token(buf, "/");
- relay_port = atoi(cut_token(buf, ":"));
- }
- } while (strcmp(buf,"\r\n") != 0);
- return START_RETRY;
-
- /* We handle both 401 and 407 codes here: 401 is WWW-Authenticate, which
- * not strictly the correct response, but some proxies do send this (e.g.
- * Symantec's Raptor firewall) */
- case 401: /* WWW-Auth required */
- case 407: /* Proxy-Auth required */
- /** NOTE: As easy implementation, we support only BASIC scheme
- and ignore realm. */
- /* If proxy_auth_type is PROXY_AUTH_BASIC and get
- this result code, authentication was failed. */
- if (proxy_auth_type != PROXY_AUTH_NONE) {
- error("Authentication failed.\n");
- return START_ERROR;
- }
- auth_what = (result == 401) ? "WWW-Authenticate:" : "Proxy-Authenticate:";
- do {
- if ( line_input(s, buf, sizeof(buf)) ) {
- break;
- }
- downcase(buf);
- if (expect(buf, auth_what)) {
- /* parse type and realm */
- char *scheme, *realm;
- scheme = cut_token(buf, " ");
- realm = cut_token(scheme, " ");
- if ( scheme == NULL || realm == NULL ) {
- debug("Invalid format of %s field.", auth_what);
- return START_ERROR; /* fail */
- }
- /* check supported auth type */
- if (expect(scheme, "basic")) {
- proxy_auth_type = PROXY_AUTH_BASIC;
- } else {
- debug("Unsupported authentication type: %s", scheme);
- }
- }
- } while (strcmp(buf,"\r\n") != 0);
- if ( proxy_auth_type == PROXY_AUTH_NONE ) {
- debug("Can't find %s in response header.", auth_what);
- return START_ERROR;
- } else {
- return START_RETRY;
- }
-
- default:
- /* Not allowed */
- debug("http proxy is not allowed.\n");
- return START_ERROR;
- }
- /* skip to end of response header */
- do {
- if ( line_input(s, buf, sizeof(buf) ) ) {
- debug("Can't skip response headers\n");
- return START_ERROR;
- }
- } while ( strcmp(buf,"\r\n") != 0 );
-
- return START_OK;
-}
-
-/* begin relaying via TELNET proxy.
- Sends string specified by telnet_command (-c option) with
- replacing host name and port number to the socket. */
-int
-begin_telnet_relay( SOCKET s )
-{
- char buf[1024];
- char *cmd;
- char *good_phrase = "connected to";
- char *bad_phrase_list[] = {
- " failed", " refused", " rejected", " closed"
- };
- char sep = ' ';
- int i;
-
- debug("begin_telnet_relay()\n");
-
- /* report phrase */
- debug("good phrase: '%s'\n", good_phrase);
- debug("bad phrases");
- sep = ':';
- for (i=0; i< (sizeof(bad_phrase_list) / sizeof(char*)); i++) {
- debug_("%c '%s'", sep, bad_phrase_list[i]);
- sep = ',';
- }
- debug_("\n");
-
- /* make request string with replacing %h by destination hostname
- and %p by port number, etc. */
- cmd = expand_host_and_port(telnet_command, dest_host, dest_port);
-
- /* Sorry, we send request string now without waiting a prompt. */
- if (sendf(s, "%s\r\n", cmd) < 0) {
- free(cmd);
- return START_ERROR;
- }
- free(cmd);
-
- /* Process answer from proxy until good or bad phrase is detected. We
- assume that the good phrase should be appeared only in the final
- line of proxy responses. Bad keywods in the line causes operation
- fail. First checks a good phrase, then checks bad phrases.
- If no match, continue reading line from proxy. */
- while (!line_input(s, buf, sizeof(buf)) && buf[0] != '\0') {
- downcase(buf);
- /* first, check good phrase */
- if (strstr(buf, good_phrase)) {
- debug("good phrase is detected: '%s'\n", good_phrase);
- return START_OK;
- }
- /* then, check bad phrase */
- for (i=0; i<(sizeof(bad_phrase_list)/sizeof(char*)); i++) {
- if (strstr(buf, bad_phrase_list[i]) != NULL) {
- debug("bad phrase is detected: '%s'\n", bad_phrase_list[i]);
- return START_ERROR;
- }
- }
- }
- debug("error reading from telnet proxy\n");
-
- return START_ERROR;
-}
-
-
-#ifdef _WIN32
-/* ddatalen()
- Returns 1 if data is available, otherwise return 0
- */
-int
-stdindatalen (void)
-{
- DWORD len = 0;
- struct stat st;
- fstat( 0, &st );
- if ( st.st_mode & _S_IFIFO ) {
- /* in case of PIPE */
- if ( !PeekNamedPipe( GetStdHandle(STD_INPUT_HANDLE),
- NULL, 0, NULL, &len, NULL) ) {
- if ( GetLastError() == ERROR_BROKEN_PIPE ) {
- /* PIPE source is closed */
- /* read() will detects EOF */
- len = 1;
- } else {
- fatal("PeekNamedPipe() failed, errno=%d\n",
- GetLastError());
- }
- }
- } else if ( st.st_mode & _S_IFREG ) {
- /* in case of regular file (redirected) */
- len = 1; /* always data ready */
- } else if ( _kbhit() ) {
- /* in case of console */
- len = 1;
- }
- return len;
-}
-#endif /* _WIN32 */
-
-/* relay byte from stdin to socket and fro socket to stdout.
- returns reason of termination */
-int
-do_repeater( SOCKET local_in, SOCKET local_out, SOCKET remote )
-{
- /** vars for local input data **/
- char lbuf[1024]; /* local input buffer */
- int lbuf_len; /* available data in lbuf */
- int f_local; /* read local input more? */
- /** vars for remote input data **/
- char rbuf[1024]; /* remote input buffer */
- int rbuf_len; /* available data in rbuf */
- int f_remote; /* read remote input more? */
- int close_reason = REASON_UNK; /* reason of end repeating */
- /** other variables **/
- int nfds, len;
- fd_set ifds, ofds;
- struct timeval *tmo;
-#ifdef _WIN32
- struct timeval win32_tmo;
-#endif /* _WIN32 */
-
- /* repeater between stdin/out and socket */
- nfds = ((local_in<remote)? remote: local_in) +1;
- f_local = 1; /* yes, read from local */
- f_remote = 1; /* yes, read from remote */
- lbuf_len = 0;
- rbuf_len = 0;
-
- while ( f_local || f_remote ) {
- FD_ZERO(&ifds );
- FD_ZERO(&ofds );
- tmo = NULL;
-
- /** prepare for reading local input **/
- if ( f_local && (lbuf_len < (int)sizeof(lbuf)) ) {
-#ifdef _WIN32
- if ( local_type != LOCAL_SOCKET ) {
- /* select() on Winsock is not accept standard handle.
- So use select() with short timeout and checking data
- in stdin by another method. */
- win32_tmo.tv_sec = 0;
- win32_tmo.tv_usec = 10*1000; /* 10 ms */
- tmo = &win32_tmo;
- } else
-#endif /* !_WIN32 */
- FD_SET( local_in, &ifds );
- }
-
- /** prepare for reading remote input **/
- if ( f_remote && (rbuf_len < (int)sizeof(rbuf)) ) {
- FD_SET( remote, &ifds );
- }
-
- /* FD_SET( local_out, ofds ); */
- /* FD_SET( remote, ofds ); */
-
- if ( select( nfds, &ifds, &ofds, (fd_set*)NULL, tmo ) == -1 ) {
- /* some error */
- error( "select() failed, %d\n", socket_errno());
- return REASON_ERROR;
- }
-#ifdef _WIN32
- /* fake ifds if local is stdio handle because
- select() of Winsock does not accept stdio
- handle. */
- if (f_local && (local_type!=LOCAL_SOCKET) && (0<stdindatalen()))
- FD_SET(0,&ifds); /* data ready */
-#endif
-
- /* remote => local */
- if ( FD_ISSET(remote, &ifds) && (rbuf_len < (int)sizeof(rbuf)) ) {
- len = recv( remote, rbuf + rbuf_len, sizeof(rbuf)-rbuf_len, 0);
- if ( len == 0 || (len == -1 && socket_errno() == ECONNRESET)) {
- debug("connection %s by peer\n",
- (len==0)? "closed": "reset");
- close_reason = REASON_CLOSED_BY_REMOTE;
- f_remote = 0; /* no more read from socket */
- f_local = 0;
- } else if ( len == -1 ) {
- /* error */
- fatal("recv() failed, %d\n", socket_errno());
- } else {
- debug("recv %d bytes\n", len);
- if ( 1 < f_debug ) /* more verbose */
- report_bytes( "<<<", rbuf+rbuf_len, len);
- rbuf_len += len;
- }
- }
-
- /* local => remote */
- if ( FD_ISSET(local_in, &ifds) && (lbuf_len < (int)sizeof(lbuf)) ) {
- if (local_type == LOCAL_SOCKET)
- len = recv(local_in, lbuf + lbuf_len,
- sizeof(lbuf)-lbuf_len, 0);
- else
- len = read(local_in, lbuf + lbuf_len, sizeof(lbuf)-lbuf_len);
- if ( len == 0 ) {
- /* stdin is EOF */
- debug("local input is EOF\n");
- if (!f_hold_session)
- shutdown(remote, 1); /* no-more writing */
- f_local = 0;
- close_reason = REASON_CLOSED_BY_LOCAL;
- } else if ( len == -1 ) {
- /* error on reading from stdin */
- if (f_hold_session) {
- debug ("failed to read from local\n");
- f_local = 0;
- close_reason = REASON_CLOSED_BY_LOCAL;
- } else
- fatal("recv() failed, errno = %d\n", errno);
- } else {
- /* repeat */
- lbuf_len += len;
- }
- }
-
- /* flush data in buffer to socket */
- if ( 0 < lbuf_len ) {
- len = send(remote, lbuf, lbuf_len, 0);
- if ( len == -1 ) {
- fatal("send() failed, %d\n", socket_errno());
- } else if ( 0 < len ) {
- if ( 1 < f_debug ) /* more verbose */
- report_bytes( ">>>", lbuf, len);
- /* move data on to top of buffer */
- debug("sent %d bytes\n", len);
- lbuf_len -= len;
- if ( 0 < lbuf_len )
- memcpy( lbuf, lbuf+len, lbuf_len );
- assert( 0 <= lbuf_len );
- }
- }
-
- /* flush data in buffer to local output */
- if ( 0 < rbuf_len ) {
- if (local_type == LOCAL_SOCKET)
- len = send( local_out, rbuf, rbuf_len, 0);
- else
- len = write( local_out, rbuf, rbuf_len);
- if ( len == -1 ) {
- fatal("output (local) failed, errno=%d\n", errno);
- }
- rbuf_len -= len;
- if ( len < rbuf_len )
- memcpy( rbuf, rbuf+len, rbuf_len );
- assert( 0 <= rbuf_len );
- }
- if (f_local == 0 && f_hold_session) {
- debug ("closing local port without disconnecting from remote\n");
- f_remote = 0;
- shutdown (local_out, 2);
- close (local_out);
- break;
- }
- }
-
- return close_reason;
-}
-
-int
-accept_connection (u_short port)
-{
- static int sock = -1;
- int connection;
- struct sockaddr_in name;
- struct sockaddr client;
- int socklen;
- fd_set ifds;
- int nfds;
- int sockopt;
-
- /* Create the socket. */
- debug("Creating source port to forward.\n");
- sock = socket (PF_INET, SOCK_STREAM, 0);
- if (sock < 0)
- fatal("socket() failed, errno=%d\n", socket_errno());
- sockopt = 1;
- setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
- (void*)&sockopt, sizeof(sockopt));
-
- /* Give the socket a name. */
- name.sin_family = AF_INET;
- name.sin_port = htons (port);
- name.sin_addr.s_addr = htonl (INADDR_ANY);
- if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0)
- fatal ("bind() failed, errno=%d\n", socket_errno());
-
- if (listen( sock, 1) < 0)
- fatal ("listen() failed, errno=%d\n", socket_errno());
-
- /* wait for new connection with watching EOF of stdin. */
- debug ("waiting new connection at port %d (socket=%d)\n", port, sock);
- nfds = sock + 1;
- do {
- int n;
- struct timeval *ptmo = NULL;
-#ifdef _WIN32
- struct timeval tmo;
- tmo.tv_sec = 0;
- tmo.tv_usec = 100*1000; /* On Windows, 100ms timeout */
- ptmo = &tmo;
-#endif /* _WIN32 */
- FD_ZERO (&ifds);
- FD_SET ((SOCKET)sock, &ifds);
-#ifndef _WIN32
- FD_SET (0, &ifds); /* watch stdin */
-#endif
- n = select (nfds, &ifds, NULL, NULL, ptmo);
- if (n == -1) {
- fatal ("select() failed, %d\n", socket_errno());
- exit (1);
- }
-#ifdef _WIN32
- if (0 < stdindatalen()) {
- FD_SET (0, &ifds); /* fake */
- n++;
- }
-#endif
- if (0 < n) {
- if (FD_ISSET(0, &ifds) && (getchar() <= 0)) {
- /* EOF */
- debug ("Give-up waiting port because stdin is closed.");
- exit(0);
- }
- if (FD_ISSET(sock, &ifds))
- break; /* socket is stimulated */
- }
- } while (1);
- socklen = sizeof(client);
- connection = accept( sock, &client, &socklen);
- if ( connection < 0 )
- fatal ("accept() failed, errno=%d\n", socket_errno());
- return connection;
-}
-
-
-
-/** Main of program **/
-int
-main( int argc, char **argv )
-{
- int ret;
- int remote; /* socket */
- int local_in; /* Local input */
- int local_out; /* Local output */
- int reason;
-#ifdef _WIN32
- WSADATA wsadata;
- WSAStartup( 0x101, &wsadata);
-#endif /* _WIN32 */
-
- /* initialization */
- make_revstr();
- getarg( argc, argv );
- debug("Program is $Revision: 100 $\n");
-
- /* Open local_in and local_out if forwarding a port */
- if ( local_type == LOCAL_SOCKET ) {
- /* Relay between local port and destination */
- local_in = local_out = accept_connection( local_port );
- } else {
- /* Relay between stdin/stdout and desteination */
- local_in = 0;
- local_out = 1;
-#ifdef _WIN32
- _setmode(local_in, O_BINARY);
- _setmode(local_out, O_BINARY);
-#endif
- }
-
-retry:
-#ifndef _WIN32
- if (0 < connect_timeout)
- set_timeout (connect_timeout);
-#endif /* not _WIN32 */
-
- if (check_direct(dest_host))
- relay_method = METHOD_DIRECT;
- /* make connection */
- if ( relay_method == METHOD_DIRECT ) {
- remote = open_connection (dest_host, dest_port);
- if ( remote == SOCKET_ERROR )
- fatal( "Unable to connect to destination host, errno=%d\n",
- socket_errno());
- } else {
- remote = open_connection (relay_host, relay_port);
- if ( remote == SOCKET_ERROR )
- fatal( "Unable to connect to relay host, errno=%d\n",
- socket_errno());
- }
-
- /** resolve destination host (SOCKS) **/
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
- if (socks_ns.sin_addr.s_addr != 0)
- switch_ns (&socks_ns);
-#endif /* not _WIN32 && not __CYGWIN32__ */
- if (relay_method == METHOD_SOCKS &&
- socks_resolve == RESOLVE_LOCAL &&
- local_resolve (dest_host, &dest_addr) < 0) {
- fatal("Unknown host: %s", dest_host);
- }
-
- /** relay negociation **/
- switch ( relay_method ) {
- case METHOD_SOCKS:
- if ( ((socks_version == 5) && (begin_socks5_relay(remote) < 0)) ||
- ((socks_version == 4) && (begin_socks4_relay(remote) < 0)) )
- fatal( "failed to begin relaying via SOCKS.\n");
- break;
-
- case METHOD_HTTP:
- ret = begin_http_relay(remote);
- switch (ret) {
- case START_ERROR:
- close (remote);
- fatal("failed to begin relaying via HTTP.\n");
- case START_OK:
- break;
- case START_RETRY:
- /* retry with authentication */
- close (remote);
- goto retry;
- }
- break;
- case METHOD_TELNET:
- if (begin_telnet_relay(remote) < 0)
- fatal("failed to begin relaying via telnet.\n");
- break;
- }
- debug("connected\n");
-
-#ifndef _WIN32
- if (0 < connect_timeout)
- set_timeout (0);
-#endif /* not _WIN32 */
-
- /* main loop */
- debug ("start relaying.\n");
-do_repeater:
- reason = do_repeater(local_in, local_out, remote);
- debug ("relaying done.\n");
- if (local_type == LOCAL_SOCKET &&
- reason == REASON_CLOSED_BY_LOCAL &&
- f_hold_session) {
- /* re-wait at local port without closing remote session */
- debug ("re-waiting at local port %d\n", local_port);
- local_in = local_out = accept_connection( local_port );
- debug ("re-start relaying\n");
- goto do_repeater;
- }
- closesocket(remote);
- if ( local_type == LOCAL_SOCKET)
- closesocket(local_in);
-#ifdef _WIN32
- WSACleanup();
-#endif /* _WIN32 */
- debug ("that's all, bye.\n");
-
- return 0;
-}
-
-/* ------------------------------------------------------------
- Local Variables:
- compile-command: "cc connect.c -o connect"
- tab-width: 8
- fill-column: 74
- comment-column: 48
- End:
- ------------------------------------------------------------ */
-
-/*** end of connect.c ***/
--
1.7.5.4