/
oe-git-proxy-socks.c
executable file
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/
oe-git-proxy-socks.c
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/***********************************************************************
* 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 ¶meter_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)