Repository: haad/proxychains
Branch: master
Commit: 2ec9e1d7ca7e
Files: 20
Total size: 84.9 KB
Directory structure:
gitextract_ck5mye_z/
├── AUTHORS
├── COPYING
├── ChangeLog
├── Makefile
├── README.md
├── TODO
├── completions/
│ └── zsh/
│ └── _proxychains4
├── configure
├── dist/
│ └── proxychains.conf
├── proxychains.lsm
├── src/
│ ├── common.c
│ ├── common.h
│ ├── core.c
│ ├── core.h
│ ├── libproxychains.c
│ ├── main.c
│ ├── proxychains
│ ├── proxychains.conf
│ └── proxyresolv
└── tests/
└── test_getaddrinfo.c
================================================
FILE CONTENTS
================================================
================================================
FILE: AUTHORS
================================================
original code
N3E7CR34TUR3.
http://proxychains.sourceforge.net
netcreature@users.sourceforge.net
main.c, remote-dns, thread safety, bugfixes, build system, cleanups
rofl0r.
https://github.com/rofl0r/proxychains
localnet, bugfixes, macos x support, bsd support, packaging
haad.
https://github.com/haad/proxychains
localnet-port, bugfixes
jianing yang.
https://github.com/jianingy/proxychains
================================================
FILE: COPYING
================================================
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
675 Mass Ave, Cambridge, MA 02139, USA
Everyone is permitted to copy and distribute verbatim copies
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END OF TERMS AND CONDITIONS
================================================
FILE: ChangeLog
================================================
ProxyChains version history (public releases)
====================
ver 4.2
* Introduce BSD support make proxychains available on (NetBSD, FreeBSD ,OpenBSD and DragonFlyBSD)
* Update pkgsrc-wip proxychains package to 4.2.0 release and make easy to install and use
proxychains
-------------------------------------------------------------------------
ver 4.1
* Mac OS X support, create install script.
* thread-safe fixes by @rofl0r
-------------------------------------------------------------------------
ver 4.0
changed:
* Add a lot of fixes
* localnet-patch
* remote-dns
* thread-safe
-------------------------------------------------------------------------
ver 3.1
changed:
* dns resolver script fix
* prototypes in core.h
-------------------------------------------------------------------------
ver 3.0
added:
* new feature - DNS from behind proxy
* proxyresolv - stand alone command
* proxychains.conf - new option to enable/disable DNS support
changed:
* bugfixes in core lib
* fixed strict chain
* fixed random chain
* output text
* autotools fix
-------------------------------------------------------------------------
ver 2.1
* bugfuxes
-------------------------------------------------------------------------
ver 2.0
* major core rewrite
* new config options
-------------------------------------------------------------------------
ver 1.8.2
* minor bugfixes
* improved compilation on FreeBSD & OpenBSD sysems.
* improved compilation on Sun Solaris systems .
* cross platform (UNIX) issues
-------------------------------------------------------------------------
ver 1.8.0
added:
* Socks5 protocol
* Socks4 protocol
* HTTP proxy auth basic
* Socks4 user auth
* Socks5 user/pass auth
* more chain options (random, strict, dynamic )
* configurable timeout for TCP connect.
* configurable timeout for TCP read.
* INSTALL file (explains how to install properly)
changed:
* configuration file entries (proxychains.conf)
* configuration file lookup
-------------------------------------------------------------------------
ver 0.0.1
* TCP calls interception
* HTTP CONNECT proxy protocol.
================================================
FILE: Makefile
================================================
#
# Makefile for proxychains (requires GNU make), stolen from musl
#
# Use config.mak to override any of the following variables.
# Do not make changes here.
#
prefix = /usr/local
includedir = $(prefix)/include
libdir = $(prefix)/lib
confdir = $(prefix)/etc
datadir = $(prefix)/share
exec_prefix = $(prefix)
bindir = $(exec_prefix)/bin
zshcompdir = $(datadir)/zsh/site-functions
SRCS = $(sort $(wildcard src/*.c))
OBJS = $(SRCS:.c=.o)
LOBJS = src/core.o src/common.o src/libproxychains.o
DEPS = $(OBJS:.o=.d)
CCFLAGS = -MD -Wall -O2 -g -std=c99 -D_GNU_SOURCE -pipe -DTHREAD_SAFE -Werror
LDFLAGS = -shared -fPIC
INC =
PIC = -fPIC
AR = $(CROSS_COMPILE)ar
RANLIB = $(CROSS_COMPILE)ranlib
LD_SET_SONAME = -Wl
INSTALL_FLAGS = -D -m
-include config.mak
SHARED_LIBS = $(LDSO_PATHNAME)
ALL_LIBS = $(SHARED_LIBS)
PXCHAINS = proxychains4
ALL_TOOLS = $(PXCHAINS)
CCFLAGS+=$(USER_CFLAGS) $(OS_CFLAGS)
LDFLAGS+=$(USER_LDFLAGS) $(OS_LDFLAGS)
CXXFLAGS+=$(CCFLAGS) $(USER_CFLAGS) $(OS_CFLAGS)
CFLAGS_MAIN=-DLIB_DIR=\"$(libdir)\" -DINSTALL_PREFIX=\"$(prefix)\" -DDLL_NAME=\"$(LDSO_PATHNAME)\" -DSYSCONFDIR=\"$(confdir)\"
UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Linux)
LDSO_PATHNAME = libproxychains.$(LDSO_SUFFIX)
LDSO_SUFFIX = so.4
endif
ifeq ($(UNAME_S),Darwin)
LDSO_PATHNAME = libproxychains4.$(LDSO_SUFFIX)
LDSO_SUFFIX = dylib
endif
all: $(ALL_LIBS) $(ALL_TOOLS)
#install: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(DESTDIR)$(LDSO_PATHNAME)
install: install-exec install-config install-zsh-completion
install-exec:
install -d $(DESTDIR)/$(bindir) $(DESTDIR)/$(libdir) $(DESTDIR)/$(confdir) $(DESTDIR)/$(includedir)
install $(INSTALL_FLAGS) 755 $(ALL_TOOLS) src/proxychains src/proxyresolv $(DESTDIR)/$(bindir)/
install $(INSTALL_FLAGS) 644 $(ALL_LIBS) $(DESTDIR)/$(libdir)/
install-config:
install -d $(DESTDIR)/$(confdir)
install $(INSTALL_FLAGS) 644 src/proxychains.conf $(DESTDIR)/$(confdir)/
install-zsh-completion:
install -d $(DESTDIR)/$(zshcompdir)
install $(INSTALL_FLAGS) 644 completions/zsh/_proxychains4 -t $(DESTDIR)/$(zshcompdir)
clean:
rm -f $(ALL_LIBS)
rm -f $(ALL_TOOLS)
rm -f $(OBJS)
rm -f $(DEPS)
%.o: %.c
$(CC) $(CCFLAGS) $(CFLAGS_MAIN) $(INC) $(PIC) -c -o $@ $<
$(LDSO_PATHNAME): $(LOBJS)
$(CC) $(LDFLAGS) $(LD_SET_SONAME)$(LDSO_PATHNAME) -o $@ $(LOBJS)
$(ALL_TOOLS): $(OBJS)
$(CC) src/main.o src/common.o -o $(PXCHAINS)
.PHONY: all clean install install-exec install-config install-zsh-completion
-include $(DEPS)
================================================
FILE: README.md
================================================
# ProxyChains ver. 4.3.0 README
ProxyChains is a UNIX program, that hooks network-related libc functions
in dynamically linked programs via a preloaded DLL and redirects the
connections through SOCKS4a/5 or HTTP proxies.
WARNING: this program works only on dynamically linked programs.
also both proxychains and the program to call must use
the same dynamic linker (i.e. same libc)
## Known limitations of the current version
when a process forks, does a DNS lookup in the child, and then uses
the ip in the parent, the corresponding ip mapping will not be found,
this is because the fork can't write back into the parents mapping table.
IRSSI shows this behavior, so you have to pass the resolved ip address
to it. (you can use the proxyresolv script (requires "dig") to do so)
this means that you can't currently use tor onion urls for irssi.
to solve this issue, an external data store (file, pipe, ...) has to
manage the dns <-> ip mapping. of course there has to be proper locking.
shm_open, mkstemp, are possible candidates for a file based approach,
the other option is to spawn some kind of server process that manages the
map lookups. since connect() etc are hooked, this must not be a TCP server.
I am reluctant on doing this change, because the described behavior
seems pretty idiotic (doing a fork only for a DNS lookup), and irssi
is currently the only known affected program.
## Installation
### Using release version
*Proxychains-4.3.0* are available with pkgsrc to everyone using it on _Linux_,
_NetBSD_, _FreeBSD_, _OpenBSD_, _DragonFlyBSD_ or _Mac OS X_. You just need to install
pkgsrc-wip repository and run
make install
in a wip/proxychains directory.
You can find out more about pkgsrc on link:http://www.pkgsrc.org[pkgsrc] and about pkgsrc-wip on
link:https://pkgsrc.org/wip[Pkgsrc-wip homepage]
### Installing on Mac OS X with homebrew
You can install current proxychains on Mac OS X with an homebrew. You have to
download unofficial link:https://gist.github.com/3792521[homebrew formula] from
to your BREW_HOME by default /usr/local/Library/Formula/ and run
```
$ brew install proxychains
```
### Running Current Source code version
```
# needs a working C compiler, preferably gcc
./configure
make
sudo make install
```
## Changelog
*Version (4.x)* removes the dnsresolver script which required a dynamically
linked "dig" binary to be present with remote DNS lookup.
this speeds up any operation involving DNS, as the old script had to use TCP.
additionally it allows to use .onion urls when used with TOR.
also it removed the broken autoconf build system with a simple Makefile.
there's a ./configure script though for convenience.
it also adds support for a config file passed via command line switches/
environment variables.
*Version (3.x)* introduces support for DNS resolving through proxy
it supports SOCKS4, SOCKS5 and HTTP CONNECT proxy servers.
* Auth-types
** socks - "user/pass",
** http - "basic"
## When to use it
* When the only way to get "outside" from your LAN is through proxy server.
* To get out from behind restrictive firewall which filters outgoing ports.
* To use two (or more) proxies in chain:
```
like: your_host <--> proxy1 <--> proxy2 <--> target_host
```
* To "proxify" some program with no proxy support built-in (like telnet)
* Access intranet from outside via proxy.
* To use DNS behind proxy.
### Some cool features
* This program can mix different proxy types in the same chain
```
like: your_host <-->socks5 <--> http <--> socks4 <--> target_host
```
* Different chaining options supported
random order from the list ( user defined length of chain ).
exact order (as they appear in the list )
dynamic order (smart exclude dead proxies from chain)
* You can use it with any TCP client application, even network scanners
yes, yes - you can make portscan via proxy (or chained proxies)
for example with Nmap scanner by fyodor (www.insecure.org/nmap).
```
proxychains nmap -sT -PO -p 80 -iR (find some webservers through proxy)
```
* You can use it with servers, like squid, sendmail, or whatever.
* DNS resolving through proxy.
## Configuration
proxychains looks for configuration in the following order:
* SOCKS5 proxy host ip and port in environment variable ${PROXYCHAINS_SOCKS5_HOST} ${PROXYCHAINS_SOCKS5_PORT}
(if ${PROXYCHAINS_SOCKS5_PORT} is set, no further configuration will be searched. if ${PROXYCHAINS_SOCKS5_HOST} isn't set, host ip will become "127.0.0.1")
* file listed in environment variable ${PROXYCHAINS_CONF_FILE} or
provided as a -f argument to proxychains script or binary.
* ./proxychains.conf
* $(HOME)/.proxychains/proxychains.conf
* /etc/proxychains.conf
see more in */etc/proxychains.conf*
### Usage Example
```
$ proxychains4 telnet targethost.com
```
in this example it will run telnet through proxy(or chained proxies)
specified by *proxychains.conf*
### Usage Example
```
$ proxychains4 -f /etc/proxychains-other.conf targethost2.com
```
in this example it will use different configuration file then *proxychains.conf*
to connect to targethost2.com host.
### Usage Example
```
$ proxyresolv targethost.com
```
in this example it will resolve targethost.com through proxy(or chained proxies)
specified by *proxychains.conf*
### Usage Example:
```
$ ssh -fN -D 4321 some.example.com
$ PROXYCHAINS_SOCKS5_HOST=127.0.0.1 PROXYCHAINS_SOCKS5_PORT=4321 proxychains zsh
```
in this example, it will run a shell with all traffic proxied through
OpenSSH's "dynamic proxy" (SOCKS5 proxy) on localhost port 4321.
### Usage Example:
```
$ export PROXY_DNS_SERVER=8.8.8.8
$ proxychains4 telnet targethost.com
```
in this example, it will telnet to targethost.com using the 8.8.8.8
nameserver supplied by the user through the PROXY_DNS_SERVER
================================================
FILE: TODO
================================================
ProxyChains ver 4.0 TODO
===================
- hooks for reentrant dns functions, i.e. gethostbyaddr_r
- shadowsocks support #133
- proxy change according to attempts #156
================================================
FILE: completions/zsh/_proxychains4
================================================
#compdef proxychains4
_arguments -s -S '1: :{_command_names -e}' '*:: :_normal'
================================================
FILE: configure
================================================
#!/bin/sh
prefix=/usr/local
develflg=0
usage() {
echo "supported arguments"
echo "--prefix=/path default: $prefix"
echo "--exec_prefix=/path default: $prefix/bin"
echo "--bindir=/path default: $prefix/bin"
echo "--libdir=/path default: $prefix/lib"
echo "--includedir=/path default: $prefix/include"
echo "--sysconfdir=/path default: $prefix/etc"
echo "--devel default:no (set development mode)"
echo "--help : show this text"
exit 1
}
spliteq() {
arg=$1
echo "${arg#*=}"
#alternatives echo "$arg" | cut -d= -f2-
# or echo "$arg" | sed 's/[^=]*=//'
}
parsearg() {
case "$1" in
--prefix=*) prefix=`spliteq $1`;;
--exec_prefix=*) exec_prefix=`spliteq $1`;;
--bindir=*) bindir=`spliteq $1`;;
--libdir=*) libdir=`spliteq $1`;;
--includedir=*) includedir=`spliteq $1`;;
--sysconfdir=*) sysconfdir=`spliteq $1`;;
--devel) develflg=1;;
--help) usage;;
esac
}
ismac() {
uname -s | grep Darwin
}
isbsd() {
uname -s | grep BSD
}
islinux() {
uname -s | grep Linux
}
while true ; do
case $1 in
-*) parsearg "$1"; shift;;
*) break ;;
esac
done
if [ -z "$exec_prefix" ] ; then
exec_prefix=$prefix
fi
if [ -z "$libdir" ] ; then
libdir=$prefix/lib
fi
if [ -z "$includedir" ] ; then
includedir=$prefix/include
fi
if [ -z "$sysconfdir" ] ; then
sysconfdir=$prefix/etc
fi
if [ -z "$bindir" ] ; then
bindir=$exec_prefix/bin
fi
if [ -z "$CC" ] ; then
CC=cc
fi
if [ $develflg -eq 1 ]; then
CFLAGS="-Wextra -Wunused -Wuninitialized -Wconversion -fno-common -g -O0 -DDEBUG"
fi
echo CC?=$CC>config.mak
[ -z "$CPPFLAGS" ] || echo CPPFLAGS?=$CPPFLAGS>>config.mak
[ -z "$CFLAGS" ] || echo USER_CFLAGS?=$CFLAGS>>config.mak
[ -z "$LDFLAGS" ] || echo USER_LDFLAGS?=$LDFLAGS>>config.mak
echo prefix=$prefix>>config.mak
echo exec_prefix=$exec_prefix>>config.mak
echo bindir=$bindir>>config.mak
echo libdir=$libdir>>config.mak
echo includedir=$includedir>>config.mak
echo sysconfdir=$sysconfdir>>config.mak
if ismac ; then
arch=`uname -m`
echo LDSO_SUFFIX=dylib>>config.mak
echo OS_CFLAGS+=-DIS_MAC=1 -arch $arch >>config.mak
echo OS_LDFLAGS+=-arch $arch -lpthread -ldl -Wl,>>config.mak
echo LD_SET_SONAME=-Wl,-install_name,>>config.mak
echo LDSO_SUFFIX=dylib>>config.mak
echo INSTALL_FLAGS=-m>>config.mak
fi
if islinux ; then
echo OS_LDFLAGS=-pthread -ldl -Wl,--no-as-needed>>config.mak
echo LD_SET_SONAME=-Wl,-soname= >>config.mak
fi
if isbsd ; then
#echo OS_LDFLAGS=
#echo OS_CFLAGS
echo INSTALL_FLAGS=-m>>config.mak
echo LD_SET_SONAME=-Wl,-rpath,$libdir -install_name,>>config.mak
fi
echo done, now run make \&\& make install
================================================
FILE: dist/proxychains.conf
================================================
strict_chain
#proxy_dns
#remote_dns_subnet 224
tcp_read_time_out 15000
tcp_connect_time_out 8000
localnet 127.0.0.0/255.0.0.0
[ProxyList]
http 162.243.184.252 8585
#socks4 184.170.245.148 4145
#raw 162.243.184.252 8585
================================================
FILE: proxychains.lsm
================================================
Begin3
Title: ProxyChains
Version: 4.3
Entered-date:
Description:
Keywords:
Author: <N37CR347UR3>
Maintained-by: <haad@netbsd.org>
Primary-site:
Home-page: https://github.com/haad/proxychains
Original-site:
Platforms: Linux and other Unices
Copying-policy: GNU Public License
End
================================================
FILE: src/common.c
================================================
#include "common.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
static int check_path(char *path) {
if(!path)
return 0;
return access(path, R_OK) != -1;
}
char *get_config_path(char* default_path, char* pbuf, size_t bufsize) {
char buf[512];
// top priority: user defined path
char *path = default_path;
if(check_path(path))
return path;
if (!pbuf)
goto err;
// priority 1: env var PROXYCHAINS_CONF_FILE
path = getenv(PROXYCHAINS_CONF_FILE_ENV_VAR);
if(check_path(path))
return path;
// priority 2; proxychains conf in actual dir
path = getcwd(buf, sizeof(buf));
snprintf(pbuf, bufsize, "%s/%s", path, PROXYCHAINS_CONF_FILE);
path = pbuf;
if(check_path(path))
return path;
// priority 3; $HOME/.proxychains/proxychains.conf
path = getenv("HOME");
snprintf(pbuf, bufsize, "%s/.proxychains/%s", path, PROXYCHAINS_CONF_FILE);
path = pbuf;
if(check_path(path))
return path;
// priority 4: $SYSCONFDIR/proxychains.conf
path = SYSCONFDIR "/" PROXYCHAINS_CONF_FILE;
if(check_path(path))
return path;
// priority 5: /etc/proxychains.conf
path = "/etc/" PROXYCHAINS_CONF_FILE;
if(check_path(path))
return path;
err:
perror("couldn't find configuration file");
exit(1);
}
================================================
FILE: src/common.h
================================================
#define PROXYCHAINS_CONF_FILE_ENV_VAR "PROXYCHAINS_CONF_FILE"
#define PROXYCHAINS_QUIET_MODE_ENV_VAR "PROXYCHAINS_QUIET_MODE"
#define PROXYCHAINS_CONF_FILE "proxychains.conf"
#define PROXYCHAINS_SOCKS5_PORT_ENV_VAR "PROXYCHAINS_SOCKS5_PORT"
#define PROXYCHAINS_SOCKS5_HOST_ENV_VAR "PROXYCHAINS_SOCKS5_HOST"
#define PROXYCHAINS_DNS_ENV_VAR "PROXYCHAINS_DNS"
#define LOG_PREFIX "[proxychains] "
#define PROXYCHAINS_VERSION_MAJOR 4
#define PROXYCHAINS_VERSION_MINOR 3
#define PROXYCHAINS_VERSION_BUGFIX 0
#include <stddef.h>
char *get_config_path(char* default_path, char* pbuf, size_t bufsize);
================================================
FILE: src/core.c
================================================
/***************************************************************************
core.c - description
-------------------
begin : Tue May 14 2002
copyright : netcreature (C) 2002
email : netcreature@users.sourceforge.net
***************************************************************************
* GPL *
***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <sys/types.h>
#include <sys/cdefs.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <sys/utsname.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <time.h>
#include <sys/time.h>
#include <stdarg.h>
#include <assert.h>
#ifdef THREAD_SAFE
pthread_mutex_t internal_ips_lock;
#ifdef __APPLE__
pthread_mutex_t internal_getsrvbyname_lock;
#endif /* __APPLE__ */
#endif /* THREAD_SAFE */
#include "core.h"
#include "common.h"
extern int tcp_read_time_out;
extern int tcp_connect_time_out;
extern int proxychains_quiet_mode;
extern unsigned int remote_dns_subnet;
internal_ip_lookup_table internal_ips = { 0, 0, NULL };
uint32_t dalias_hash(char *s0) {
unsigned char *s = (void *) s0;
uint_fast32_t h = 0;
while(*s) {
h = 16 * h + *s++;
h ^= h >> 24 & 0xf0;
}
return h & 0xfffffff;
}
uint32_t index_from_internal_ip(ip_type internalip) {
ip_type tmp = internalip;
uint32_t ret;
ret = (uint32_t) (tmp.octet[3] + (tmp.octet[2] << 8) + (tmp.octet[1] << 16));
ret -= 1;
return ret;
}
char *string_from_internal_ip(ip_type internalip) {
char *res = NULL;
uint32_t index = index_from_internal_ip(internalip);
MUTEX_LOCK(&internal_ips_lock);
if(index < internal_ips.counter)
res = internal_ips.list[index]->string;
MUTEX_UNLOCK(&internal_ips_lock);
return res;
}
in_addr_t make_internal_ip(uint32_t index) {
ip_type ret;
index++; // so we can start at .0.0.1
if(index > 0xFFFFFF)
return (in_addr_t) - 1;
ret.octet[0] = remote_dns_subnet & 0xFF;
ret.octet[1] = (index & 0xFF0000) >> 16;
ret.octet[2] = (index & 0xFF00) >> 8;
ret.octet[3] = index & 0xFF;
return (in_addr_t) ret.as_int;
}
static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static int poll_retry(struct pollfd *fds, nfds_t nfsd, int timeout)
{
int ret;
int time_remain = timeout;
int time_elapsed = 0;
struct timeval start_time;
struct timeval tv;
gettimeofday(&start_time, NULL);
do {
//printf("Retry %d\n", time_remain);
ret = poll(fds, nfsd, time_remain);
gettimeofday(&tv, NULL);
time_elapsed = ((int)(tv.tv_sec - start_time.tv_sec) * 1000 + (int)(tv.tv_usec - start_time.tv_usec) / 1000);
//printf("Time elapsed %d\n", time_elapsed);
time_remain = timeout - time_elapsed;
} while(ret == -1 && errno == EINTR && time_remain > 0);
//if (ret == -1)
//printf("Return %d %d %s\n", ret, errno, strerror(errno));
return ret;
}
static void encode_base_64(char *src, char *dest, int max_len) {
int n, i;
size_t l;
l = strlen(src);
max_len = (max_len - 1) / 4;
for(i = 0; i < max_len; i++, src += 3, l -= 3) {
switch (l) {
case 0:
break;
case 1:
n = src[0] << 16;
*dest++ = base64[(n >> 18) & 077];
*dest++ = base64[(n >> 12) & 077];
*dest++ = '=';
*dest++ = '=';
break;
case 2:
n = src[0] << 16 | src[1] << 8;
*dest++ = base64[(n >> 18) & 077];
*dest++ = base64[(n >> 12) & 077];
*dest++ = base64[(n >> 6) & 077];
*dest++ = '=';
break;
default:
n = src[0] << 16 | src[1] << 8 | src[2];
*dest++ = base64[(n >> 18) & 077];
*dest++ = base64[(n >> 12) & 077];
*dest++ = base64[(n >> 6) & 077];
*dest++ = base64[n & 077];
}
if(l < 3)
break;
}
*dest++ = 0;
}
void proxychains_write_log(char *str, ...) {
char buff[1024*20];
va_list arglist;
if(!proxychains_quiet_mode) {
va_start(arglist, str);
vsnprintf(buff, sizeof(buff), str, arglist);
va_end(arglist);
fprintf(stderr, "%s", buff);
fflush(stderr);
}
}
static size_t write_n_bytes(int fd, char *buff, size_t size) {
size_t i = 0;
size_t wrote = 0;
for(;;) {
i = (size_t) write(fd, &buff[wrote], size - wrote);
if(i <= 0)
return i;
wrote += i;
if(wrote == size)
return wrote;
}
}
static size_t read_n_bytes(int fd, char *buff, size_t size) {
int ready;
size_t i;
struct pollfd pfd[1];
pfd[0].fd = fd;
pfd[0].events = POLLIN;
for(i = 0; i < size; i++) {
pfd[0].revents = 0;
ready = poll_retry(pfd, 1, tcp_read_time_out);
if(ready != 1 || !(pfd[0].revents & POLLIN) || 1 != read(fd, &buff[i], 1))
return 0;
}
return size;
}
static int timed_connect(int sock, const struct sockaddr *addr, socklen_t len) {
int ret, value;
socklen_t value_len;
struct pollfd pfd[1];
pfd[0].fd = sock;
pfd[0].events = POLLOUT;
fcntl(sock, F_SETFL, O_NONBLOCK);
ret = true_connect(sock, addr, len);
PDEBUG("\nconnect ret=%d\n", ret);
if(ret == -1 && errno == EINPROGRESS) {
ret = poll_retry(pfd, 1, tcp_connect_time_out);
PDEBUG("\npoll ret=%d\n", ret);
if(ret == 1) {
value_len = sizeof(socklen_t);
getsockopt(sock, SOL_SOCKET, SO_ERROR, &value, &value_len);
PDEBUG("\nvalue=%d\n", value);
if(!value)
ret = 0;
else
ret = -1;
} else {
ret = -1;
}
} else {
#ifdef DEBUG
if(ret == -1)
perror("true_connect");
#endif
if(ret != 0)
ret = -1;
}
fcntl(sock, F_SETFL, !O_NONBLOCK);
return ret;
}
#define INVALID_INDEX 0xFFFFFFFFU
#define HTTP_AUTH_MAX ((0xFF * 2) + 1 + 1)
static int tunnel_to(int sock, ip_type ip, unsigned short port, proxy_type pt, char *user, char *pass) {
char *dns_name = NULL;
size_t dns_len = 0;
PDEBUG("tunnel_to()\n");
// we use ip addresses with 224.* to lookup their dns name in our table, to allow remote DNS resolution
// the range 224-255.* is reserved, and it won't go outside (unless the app does some other stuff with
// the results returned from gethostbyname et al.)
// the hardcoded number 224 can now be changed using the config option remote_dns_subnet to i.e. 127
if(ip.octet[0] == remote_dns_subnet) {
dns_name = string_from_internal_ip(ip);
if(!dns_name)
goto err;
dns_len = strlen(dns_name);
if(!dns_len)
goto err;
}
PDEBUG("host dns %s\n", dns_name ? dns_name : "<NULL>");
size_t ulen = strlen(user);
size_t passlen = strlen(pass);
if(ulen > 0xFF || passlen > 0xFF || dns_len > 0xFF) {
proxychains_write_log(LOG_PREFIX "error: maximum size of 255 for user/pass or domain name!\n");
goto err;
}
size_t len;
unsigned char buff[BUFF_SIZE];
char ip_buf[16];
//memset (buff, 0, sizeof(buff));
switch (pt) {
case RAW_TYPE: {
return SUCCESS;
}
break;
case HTTP_TYPE:{
if(!dns_len) {
inet_ntop(AF_INET, &ip.octet[0], ip_buf, sizeof(ip_buf));
dns_name = ip_buf;
}
snprintf((char *) buff, sizeof(buff), "CONNECT %s:%d HTTP/1.0\r\n", dns_name,
ntohs(port));
if(user[0]) {
// 2 * 0xff: username and pass, plus 1 for ':' and 1 for zero terminator.
char src[HTTP_AUTH_MAX];
char dst[(4 * HTTP_AUTH_MAX)];
memcpy(src, user, ulen);
memcpy(src + ulen, ":", 1);
memcpy(src + ulen + 1, pass, passlen);
src[ulen + 1 + passlen] = 0;
encode_base_64(src, dst, sizeof(dst));
strcat((char *) buff, "Proxy-Authorization: Basic ");
strcat((char *) buff, dst);
strcat((char *) buff, "\r\n\r\n");
} else
strcat((char *) buff, "\r\n");
len = strlen((char *) buff);
if(len != (size_t) send(sock, buff, len, 0))
goto err;
len = 0;
// read header byte by byte.
while(len < BUFF_SIZE) {
if(1 == read_n_bytes(sock, (char *) (buff + len), 1))
len++;
else
goto err;
if(len > 4 &&
buff[len - 1] == '\n' &&
buff[len - 2] == '\r' && buff[len - 3] == '\n' && buff[len - 4] == '\r')
break;
}
// if not ok (200) or response greather than BUFF_SIZE return BLOCKED;
if(len == BUFF_SIZE || !(buff[9] == '2' && buff[10] == '0' && buff[11] == '0'))
return BLOCKED;
return SUCCESS;
}
break;
case SOCKS4_TYPE:{
buff[0] = 4; // socks version
buff[1] = 1; // connect command
memcpy(&buff[2], &port, 2); // dest port
if(dns_len) {
ip.octet[0] = 0;
ip.octet[1] = 0;
ip.octet[2] = 0;
ip.octet[3] = 1;
}
memcpy(&buff[4], &ip, 4); // dest host
len = ulen + 1; // username
if(len > 1)
memcpy(&buff[8], user, len);
else {
buff[8] = 0;
}
// do socksv4a dns resolution on the server
if(dns_len) {
memcpy(&buff[8 + len], dns_name, dns_len + 1);
len += dns_len + 1;
}
if((len + 8) != write_n_bytes(sock, (char *) buff, (8 + len)))
goto err;
if(8 != read_n_bytes(sock, (char *) buff, 8))
goto err;
if(buff[0] != 0 || buff[1] != 90)
return BLOCKED;
return SUCCESS;
}
break;
case SOCKS5_TYPE:{
if(user) {
buff[0] = 5; //version
buff[1] = 2; //nomber of methods
buff[2] = 0; // no auth method
buff[3] = 2; /// auth method -> username / password
if(4 != write_n_bytes(sock, (char *) buff, 4))
goto err;
} else {
buff[0] = 5; //version
buff[1] = 1; //nomber of methods
buff[2] = 0; // no auth method
if(3 != write_n_bytes(sock, (char *) buff, 3))
goto err;
}
if(2 != read_n_bytes(sock, (char *) buff, 2))
goto err;
if(buff[0] != 5 || (buff[1] != 0 && buff[1] != 2)) {
if(buff[0] == 5 && buff[1] == 0xFF)
return BLOCKED;
else
goto err;
}
if(buff[1] == 2) {
// authentication
char in[2];
char out[515];
char *cur = out;
int c;
*cur++ = 1; // version
c = ulen & 0xFF;
*cur++ = (char)c;
memcpy(cur, user, (size_t)c);
cur += c;
c = passlen & 0xFF;
*cur++ = (char)c;
memcpy(cur, pass, (size_t)c);
cur += c;
if((size_t)(cur - out) != write_n_bytes(sock, out, (size_t) (cur - out)))
goto err;
if(2 != read_n_bytes(sock, in, 2))
goto err;
if(in[0] != 1 || in[1] != 0) {
if(in[0] != 1)
goto err;
else
return BLOCKED;
}
}
size_t buff_iter = 0;
buff[buff_iter++] = 5; // version
buff[buff_iter++] = 1; // connect
buff[buff_iter++] = 0; // reserved
if(!dns_len) {
buff[buff_iter++] = 1; // ip v4
memcpy(buff + buff_iter, &ip, 4); // dest host
buff_iter += 4;
} else {
buff[buff_iter++] = 3; //dns
buff[buff_iter++] = dns_len & 0xFF;
memcpy(buff + buff_iter, dns_name, dns_len);
buff_iter += dns_len;
}
memcpy(buff + buff_iter, &port, 2); // dest port
buff_iter += 2;
if(buff_iter != write_n_bytes(sock, (char *) buff, buff_iter))
goto err;
if(4 != read_n_bytes(sock, (char *) buff, 4))
goto err;
if(buff[0] != 5 || buff[1] != 0)
goto err;
switch (buff[3]) {
case 1:
len = 4;
break;
case 4:
len = 16;
break;
case 3:
len = 0;
if(1 != read_n_bytes(sock, (char *) &len, 1))
goto err;
break;
default:
goto err;
}
if(len + 2 != read_n_bytes(sock, (char *) buff, len + 2))
goto err;
return SUCCESS;
}
break;
}
err:
return SOCKET_ERROR;
}
#define TP " ... "
#define DT "Dynamic chain"
#define ST "Strict chain"
#define RT "Random chain"
static int start_chain(int *fd, proxy_data * pd, char *begin_mark) {
struct sockaddr_in addr;
char ip_buf[16];
*fd = socket(PF_INET, SOCK_STREAM, 0);
if(*fd == -1)
goto error;
inet_ntop(AF_INET, &pd->ip.octet[0], ip_buf, sizeof(ip_buf));
proxychains_write_log(LOG_PREFIX "%s " TP " %s:%d ",
begin_mark, ip_buf, htons(pd->port));
pd->ps = PLAY_STATE;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = (in_addr_t) pd->ip.as_int;
addr.sin_port = pd->port;
if(timed_connect(*fd, (struct sockaddr *) &addr, sizeof(addr))) {
pd->ps = DOWN_STATE;
goto error1;
}
pd->ps = BUSY_STATE;
return SUCCESS;
error1:
proxychains_write_log(TP " timeout\n");
error:
if(*fd != -1)
close(*fd);
return SOCKET_ERROR;
}
unsigned int get_rand_int(unsigned int range){
static FILE *fp;
unsigned int randval;
if (!fp) {
fp = fopen("/dev/urandom", "r");
}
if(fread(&randval, sizeof(randval), 1, fp)) {
return (randval % range);
} else {
srand((unsigned int)time(NULL));
return ((unsigned int)rand() % range);
}
}
static proxy_data *select_proxy(select_type how, proxy_data * pd, unsigned int proxy_count, unsigned int *offset) {
unsigned int i = 0, k = 0;
if(*offset >= proxy_count)
return NULL;
switch (how) {
case RANDOMLY:
do {
k++;
i = 0 + get_rand_int(proxy_count);
} while(pd[i].ps != PLAY_STATE && k < proxy_count * 100);
break;
case FIFOLY:
for(i = *offset; i < proxy_count; i++) {
if(pd[i].ps == PLAY_STATE) {
*offset = i;
break;
}
}
default:
break;
}
if(i >= proxy_count)
i = 0;
return (pd[i].ps == PLAY_STATE) ? &pd[i] : NULL;
}
static void release_all(proxy_data * pd, unsigned int proxy_count) {
unsigned int i;
for(i = 0; i < proxy_count; i++)
pd[i].ps = PLAY_STATE;
return;
}
static void release_busy(proxy_data * pd, unsigned int proxy_count) {
unsigned int i;
for(i = 0; i < proxy_count; i++)
if(pd[i].ps == BUSY_STATE)
pd[i].ps = PLAY_STATE;
return;
}
static unsigned int calc_alive(proxy_data * pd, unsigned int proxy_count) {
unsigned int i, alive_count = 0;
release_busy(pd, proxy_count);
for(i = 0; i < proxy_count; i++)
if(pd[i].ps == PLAY_STATE)
alive_count++;
return alive_count;
}
static int chain_step(int ns, proxy_data * pfrom, proxy_data * pto) {
int retcode = -1;
char *hostname;
char ip_buf[16];
PDEBUG("chain_step()\n");
if(pto->ip.octet[0] == remote_dns_subnet) {
hostname = string_from_internal_ip(pto->ip);
if(!hostname)
goto usenumericip;
} else {
usenumericip:
inet_ntop(AF_INET, &pto->ip.octet[0], ip_buf, sizeof(ip_buf));
hostname = ip_buf;
}
proxychains_write_log(TP " %s:%d ", hostname, htons(pto->port));
retcode = tunnel_to(ns, pto->ip, pto->port, pfrom->pt, pfrom->user, pfrom->pass);
switch (retcode) {
case SUCCESS:
pto->ps = BUSY_STATE;
break;
case BLOCKED:
pto->ps = BLOCKED_STATE;
proxychains_write_log("<--denied\n");
close(ns);
break;
case SOCKET_ERROR:
pto->ps = DOWN_STATE;
proxychains_write_log("<--socket error or timeout!\n");
close(ns);
break;
}
return retcode;
}
int connect_proxy_chain(int sock, ip_type target_ip,
unsigned short target_port, proxy_data * pd,
unsigned int proxy_count, chain_type ct, unsigned int max_chain) {
proxy_data p4;
proxy_data *p1, *p2, *p3;
int ns = -1;
unsigned int offset = 0;
unsigned int alive_count = 0;
unsigned int curr_len = 0;
p3 = &p4;
PDEBUG("connect_proxy_chain\n");
again:
switch (ct) {
case DYNAMIC_TYPE:
calc_alive(pd, proxy_count);
offset = 0;
do {
if(!(p1 = select_proxy(FIFOLY, pd, proxy_count, &offset)))
goto error_more;
} while(SUCCESS != start_chain(&ns, p1, DT) && offset < proxy_count);
for(;;) {
p2 = select_proxy(FIFOLY, pd, proxy_count, &offset);
if(!p2)
break;
if(SUCCESS != chain_step(ns, p1, p2)) {
PDEBUG("GOTO AGAIN 1\n");
goto again;
}
p1 = p2;
}
//proxychains_write_log(TP);
p3->ip = target_ip;
p3->port = target_port;
if(SUCCESS != chain_step(ns, p1, p3))
goto error;
break;
case STRICT_TYPE:
calc_alive(pd, proxy_count);
offset = 0;
if(!(p1 = select_proxy(FIFOLY, pd, proxy_count, &offset))) {
PDEBUG("select_proxy failed\n");
goto error_strict;
}
if(SUCCESS != start_chain(&ns, p1, ST)) {
PDEBUG("start_chain failed\n");
goto error_strict;
}
while(offset < proxy_count) {
if(!(p2 = select_proxy(FIFOLY, pd, proxy_count, &offset)))
break;
if(SUCCESS != chain_step(ns, p1, p2)) {
PDEBUG("chain_step failed\n");
goto error_strict;
}
p1 = p2;
}
//proxychains_write_log(TP);
p3->ip = target_ip;
p3->port = target_port;
if(SUCCESS != chain_step(ns, p1, p3))
goto error;
break;
case RANDOM_TYPE:
alive_count = calc_alive(pd, proxy_count);
if(alive_count < max_chain)
goto error_more;
curr_len = offset = 0;
do {
if(!(p1 = select_proxy(RANDOMLY, pd, proxy_count, &offset)))
goto error_more;
} while(SUCCESS != start_chain(&ns, p1, RT) && offset < max_chain);
while(++curr_len < max_chain) {
if(!(p2 = select_proxy(RANDOMLY, pd, proxy_count, &offset)))
goto error_more;
if(SUCCESS != chain_step(ns, p1, p2)) {
PDEBUG("GOTO AGAIN 2\n");
goto again;
}
p1 = p2;
}
//proxychains_write_log(TP);
p3->ip = target_ip;
p3->port = target_port;
if(SUCCESS != chain_step(ns, p1, p3))
goto error;
}
proxychains_write_log(TP " OK\n");
dup2(ns, sock);
close(ns);
return 0;
error:
if(ns != -1)
close(ns);
errno = ECONNREFUSED; // for nmap ;)
return -1;
error_more:
proxychains_write_log("\n!!!need more proxies!!!\n");
error_strict:
PDEBUG("error\n");
release_all(pd, proxy_count);
if(ns != -1)
close(ns);
errno = ETIMEDOUT;
return -1;
}
static const ip_type local_host = { {127, 0, 0, 1} };
char hostname[256]; // default maximum length of hostname in linux
struct hostent *proxy_gethostbyname(const char *name, struct gethostbyname_data* data) {
char buff[256];
uint32_t i, hash;
// yep, new_mem never gets freed. once you passed a fake ip to the client, you can't "retreat" it
void *new_mem;
size_t l;
struct hostent *hp;
data->resolved_addr_p[0] = (char *) &data->resolved_addr;
data->resolved_addr_p[1] = NULL;
data->hostent_space.h_addr_list = data->resolved_addr_p;
data->resolved_addr = 0;
gethostname(buff, sizeof(buff));
if(!strcmp(buff, name)) {
data->resolved_addr = inet_addr(buff);
if(data->resolved_addr == (in_addr_t) (-1))
data->resolved_addr = (in_addr_t) (local_host.as_int);
snprintf(hostname,sizeof hostname, "%s", name);
data->hostent_space.h_name = hostname;
data->hostent_space.h_length = sizeof (in_addr_t);
data->hostent_space.h_addrtype = AF_INET;
return &data->hostent_space;
}
memset(buff, 0, sizeof(buff));
while((hp = gethostent()))
if(!strcmp(hp->h_name, name))
return hp;
hash = dalias_hash((char *) name);
MUTEX_LOCK(&internal_ips_lock);
// see if we already have this dns entry saved.
if(internal_ips.counter) {
for(i = 0; i < internal_ips.counter; i++) {
if(internal_ips.list[i]->hash == hash && !strcmp(name, internal_ips.list[i]->string)) {
data->resolved_addr = make_internal_ip(i);
PDEBUG("got cached ip for %s\n", name);
goto have_ip;
}
}
}
// grow list if needed.
if(internal_ips.capa < internal_ips.counter + 1) {
PDEBUG("realloc\n");
new_mem = realloc(internal_ips.list, (internal_ips.capa + 16) * sizeof(void *));
if(new_mem) {
internal_ips.capa += 16;
internal_ips.list = new_mem;
} else {
oom:
proxychains_write_log("out of mem\n");
goto err_plus_unlock;
}
}
data->resolved_addr = make_internal_ip(internal_ips.counter);
if(data->resolved_addr == (in_addr_t) - 1)
goto err_plus_unlock;
l = strlen(name);
new_mem = malloc(sizeof(string_hash_tuple) + l + 1);
if(!new_mem)
goto oom;
PDEBUG("creating new entry %d for ip of %s\n", (int) internal_ips.counter, name);
internal_ips.list[internal_ips.counter] = new_mem;
internal_ips.list[internal_ips.counter]->hash = hash;
internal_ips.list[internal_ips.counter]->string = (char *) new_mem + sizeof(string_hash_tuple);
memcpy(internal_ips.list[internal_ips.counter]->string, name, l + 1);
internal_ips.counter += 1;
have_ip:
MUTEX_UNLOCK(&internal_ips_lock);
strncpy(data->addr_name, name, sizeof(data->addr_name) - 1);
data->hostent_space.h_name = data->addr_name;
data->hostent_space.h_length = sizeof(in_addr_t);
data->hostent_space.h_addrtype = AF_INET;
return &data->hostent_space;
err_plus_unlock:
MUTEX_UNLOCK(&internal_ips_lock);
return NULL;
}
struct addrinfo_data {
struct addrinfo addrinfo_space;
struct sockaddr sockaddr_space;
char addr_name[256];
};
void proxy_freeaddrinfo(struct addrinfo *res) {
free(res);
}
void proxy_getservbyname(const char * service, struct servent *se_buf,
char * buf, size_t buf_len, struct servent **se_result)
{
#ifdef __linux__
getservbyname_r(service, NULL, se_buf, buf, buf_len, se_result);
#endif
#ifdef __APPLE__
struct servent *se;
MUTEX_LOCK(&internal_getsrvbyname_lock);
if(service) {
se = getservbyname(service, NULL);
if ( se != NULL ) {
memcpy(se_buf, se, buf_len);
*se_result = se_buf;
} else {
*se_result = NULL;
}
}
MUTEX_UNLOCK(&internal_getsrvbyname_lock);
#endif /* __APPLE__ */
}
int proxy_getaddrinfo(const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res) {
struct gethostbyname_data ghdata;
struct addrinfo_data *space;
struct servent *se = NULL;
struct hostent *hp = NULL;
struct servent se_buf;
struct addrinfo *p;
char buf[1024];
int port;
// printf("proxy_getaddrinfo node %s service %s\n",node,service);
space = calloc(1, sizeof(struct addrinfo_data));
if(!space)
return 1;
if(node && !inet_aton(node, &((struct sockaddr_in *) &space->sockaddr_space)->sin_addr)) {
hp = proxy_gethostbyname(node, &ghdata);
if(hp) {
memcpy(&((struct sockaddr_in *) &space->sockaddr_space)->sin_addr,
*(hp->h_addr_list), sizeof(in_addr_t));
} else {
free(space);
return 1;
}
}
if(service)
proxy_getservbyname(service, &se_buf, buf, sizeof(buf), &se);
port = se ? se->s_port : htons((uint16_t)atoi(service ? service : "0"));
((struct sockaddr_in *) &space->sockaddr_space)->sin_port = (in_port_t)port;
*res = p = &space->addrinfo_space;
assert((size_t)p == (size_t) space);
p->ai_addr = &space->sockaddr_space;
if(node)
strncpy(space->addr_name, node, sizeof(space->addr_name) - 1);
p->ai_canonname = space->addr_name;
p->ai_next = NULL;
p->ai_family = space->sockaddr_space.sa_family = AF_INET;
p->ai_addrlen = sizeof(space->sockaddr_space);
if(hints) {
p->ai_socktype = hints->ai_socktype;
p->ai_flags = hints->ai_flags;
p->ai_protocol = hints->ai_protocol;
} else {
#ifdef BSD
p->ai_flags = (AI_V4MAPPED | AI_ADDRCONFIG);
#else
p->ai_flags = (AI_ADDRCONFIG);
#endif
}
return 0;
}
================================================
FILE: src/core.h
================================================
/***************************************************************************
core.h - description
-------------------
begin : Tue May 14 2002
copyright : netcreature (C) 2002
email : netcreature@users.sourceforge.net
***************************************************************************
***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <stdint.h>
#ifndef __CORE_HEADER
#define __CORE_HEADER
#define BUFF_SIZE 8*1024 // used to read responses from proxies.
#define MAX_LOCALNET 64
#define MAX_DNAT 64
typedef union {
unsigned char octet[4];
uint32_t as_int;
} ip_type;
typedef struct {
uint32_t hash;
char* string;
} string_hash_tuple;
typedef struct {
uint32_t counter;
uint32_t capa;
string_hash_tuple** list;
} internal_ip_lookup_table;
extern internal_ip_lookup_table internal_ips;
#ifdef THREAD_SAFE
#include <pthread.h>
extern pthread_mutex_t internal_ips_lock;
extern pthread_mutex_t internal_getsrvbyname_lock;
# define MUTEX_LOCK(x) pthread_mutex_lock(x)
# define MUTEX_UNLOCK(x) pthread_mutex_unlock(x)
# define MUTEX_INIT(x,y) pthread_mutex_init(x, y)
#else
# define MUTEX_LOCK(x)
# define MUTEX_UNLOCK(x)
# define MUTEX_INIT(x,y)
#endif
/*error codes*/
typedef enum {
SUCCESS=0,
MEMORY_FAIL, // malloc failed
SOCKET_ERROR, // look errno for more
CHAIN_DOWN, // no proxy in chain responds to tcp
CHAIN_EMPTY, // if proxy_count = 0
BLOCKED // target's port blocked on last proxy in the chain
} ERR_CODE;
typedef enum {
HTTP_TYPE,
RAW_TYPE,
SOCKS4_TYPE,
SOCKS5_TYPE
} proxy_type;
typedef enum {
DYNAMIC_TYPE,
STRICT_TYPE,
RANDOM_TYPE}
chain_type;
typedef enum {
PLAY_STATE,
DOWN_STATE,
BLOCKED_STATE,
BUSY_STATE
} proxy_state;
typedef enum {
RANDOMLY,
FIFOLY
} select_type;
typedef struct {
struct in_addr in_addr, netmask;
unsigned short port;
} localaddr_arg;
typedef struct {
struct in_addr orig_dst, new_dst;
unsigned short orig_port, new_port;
} dnat_arg;
typedef struct {
ip_type ip;
unsigned short port;
proxy_type pt;
proxy_state ps;
char user[256];
char pass[256];
} proxy_data;
int connect_proxy_chain (int, ip_type, unsigned short, proxy_data *, unsigned int,
chain_type, unsigned int);
void proxychains_write_log(char *, ...);
typedef int (*connect_t)(int, const struct sockaddr *, socklen_t);
typedef struct hostent* (*gethostbyname_t)(const char *);
typedef int (*freeaddrinfo_t)(struct addrinfo *);
#if (defined __linux__) || (defined __APPLE__)
typedef struct hostent *(*gethostbyaddr_t) (const void *, socklen_t, int);
#else
typedef struct hostent *(*gethostbyaddr_t) (const char *, socklen_t, int);
#endif
typedef int (*getaddrinfo_t)(const char *, const char *, const struct addrinfo *,
struct addrinfo **);
typedef int (*getnameinfo_t) (const struct sockaddr *, socklen_t, char *,
socklen_t, char *, socklen_t, int);
extern connect_t true_connect;
extern gethostbyname_t true_gethostbyname;
extern getaddrinfo_t true_getaddrinfo;
extern freeaddrinfo_t true_freeaddrinfo;
extern getnameinfo_t true_getnameinfo;
extern gethostbyaddr_t true_gethostbyaddr;
struct gethostbyname_data {
struct hostent hostent_space;
in_addr_t resolved_addr;
char *resolved_addr_p[2];
char addr_name[1024 * 8];
};
struct hostent* proxy_gethostbyname(const char *, struct gethostbyname_data *);
void proxy_getservbyname(const char *, struct servent *, char *, size_t, struct servent **);
int proxy_getaddrinfo(const char *, const char *, const struct addrinfo *, struct addrinfo **);
void proxy_freeaddrinfo(struct addrinfo *);
#ifdef DEBUG
# define PDEBUG(fmt, args...) do { fprintf(stderr,"DEBUG:"fmt, ## args); fflush(stderr); } while(0)
#else
# define PDEBUG(fmt, args...) do {} while (0)
#endif
#endif
================================================
FILE: src/libproxychains.c
================================================
/***************************************************************************
libproxychains.c - description
-------------------
begin : Tue May 14 2002
copyright : netcreature (C) 2002
email : netcreature@users.sourceforge.net
***************************************************************************/
/* GPL */
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/param.h>
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include "core.h"
#include "common.h"
#define satosin(x) ((struct sockaddr_in *) &(x))
#define SOCKADDR(x) (satosin(x)->sin_addr.s_addr)
#define SOCKADDR_2(x) (satosin(x)->sin_addr)
#define SOCKPORT(x) (satosin(x)->sin_port)
#define SOCKFAMILY(x) (satosin(x)->sin_family)
#define MAX_CHAIN 512
connect_t true_connect;
gethostbyname_t true_gethostbyname;
getaddrinfo_t true_getaddrinfo;
freeaddrinfo_t true_freeaddrinfo;
getnameinfo_t true_getnameinfo;
gethostbyaddr_t true_gethostbyaddr;
int tcp_read_time_out;
int tcp_connect_time_out;
int proxychains_got_chain_data = 0;
int proxychains_quiet_mode = 0;
int proxychains_resolver = 0;
unsigned int proxychains_proxy_count = 0;
unsigned int proxychains_max_chain = 1;
unsigned int remote_dns_subnet = 224;
localaddr_arg localnet_addr[MAX_LOCALNET];
chain_type proxychains_ct;
proxy_data proxychains_pd[MAX_CHAIN];
size_t num_localnet_addr = 0;
dnat_arg dnats[MAX_DNAT];
size_t num_dnats = 0;
#ifdef THREAD_SAFE
pthread_once_t init_once = PTHREAD_ONCE_INIT;
#endif
static int init_l = 0;
static void load_default_settings(chain_type *ct);
static inline void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct);
static void simple_socks5_env(proxy_data * pd, unsigned int *proxy_count, chain_type * ct);
static void* load_sym(char* symname, void* proxyfunc) {
void *funcptr = dlsym(RTLD_NEXT, symname);
if(!funcptr) {
fprintf(stderr, "Cannot load symbol '%s' %s\n", symname, dlerror());
exit(1);
} else {
PDEBUG("loaded symbol '%s'" " real addr %p wrapped addr %p\n", symname, funcptr, proxyfunc);
}
if(funcptr == proxyfunc) {
PDEBUG("circular reference detected, aborting!\n");
abort();
}
return funcptr;
}
#define INIT() init_lib_wrapper(__FUNCTION__)
#define SETUP_SYM(X) do { true_ ## X = load_sym( # X, X ); } while(0)
static void do_init(void) {
MUTEX_INIT(&internal_ips_lock, NULL);
#ifdef __APPLE__
MUTEX_INIT(&internal_getsrvbyname_lock, NULL);
#endif
/* check for simple SOCKS5 proxy setup */
simple_socks5_env(proxychains_pd, &proxychains_proxy_count, &proxychains_ct);
/* read the config file */
get_chain_data(proxychains_pd, &proxychains_proxy_count, &proxychains_ct);
proxychains_write_log(LOG_PREFIX "DLL init\n");
SETUP_SYM(connect);
SETUP_SYM(gethostbyname);
SETUP_SYM(getaddrinfo);
SETUP_SYM(freeaddrinfo);
SETUP_SYM(gethostbyaddr);
SETUP_SYM(getnameinfo);
init_l = 1;
}
static void init_lib_wrapper(const char* caller) {
#ifndef DEBUG
(void) caller;
#endif
#ifndef THREAD_SAFE
if(init_l) return;
PDEBUG("%s called from %s\n", __FUNCTION__, caller);
do_init();
#else
if(!init_l) PDEBUG("%s called from %s\n", __FUNCTION__, caller);
pthread_once(&init_once, do_init);
#endif
}
/* if we use gcc >= 3, we can instruct the dynamic loader
* to call init_lib at link time. otherwise it gets loaded
* lazily, which has the disadvantage that there's a potential
* race condition if 2 threads call it before init_l is set
* and PTHREAD support was disabled */
#if __GNUC__ > 2
__attribute__((constructor))
static void gcc_init(void) {
INIT();
}
#endif
FILE *
open_config_file() {
char home_conf[MAXPATHLEN], prefix_conf[MAXPATHLEN];
FILE *file;
snprintf(home_conf, 256, "%s/.proxychains/proxychains.conf", getenv("HOME"));
snprintf(prefix_conf, 256, "%s/etc/proxychains.conf", INSTALL_PREFIX);
if(!(file = fopen("./proxychains.conf", "r"))) {
if(!(file = fopen(home_conf, "r"))) {
if(!(file = fopen(prefix_conf, "r"))) {
if(!(file = fopen("/etc/proxychains.conf", "r"))) {
perror("Can't locate proxychains.conf");
exit(1);
}
}
}
}
return file;
}
/* default settings common to get_chain_data and simple_socks5_env */
static void load_default_settings(chain_type *ct) {
char *env;
tcp_read_time_out = 4 * 1000;
tcp_connect_time_out = 10 * 1000;
*ct = DYNAMIC_TYPE;
env = getenv(PROXYCHAINS_QUIET_MODE_ENV_VAR);
if(env && *env == '1')
proxychains_quiet_mode = 1;
}
/* get configuration from config file */
static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct) {
unsigned int count = 0;
int port_n = 0, list = 0;
char buff[1024], type[1024], host[1024], user[1024];
char *env;
char local_in_addr_port[32];
char local_in_addr[32], local_in_port[32], local_netmask[32];
char dnat_orig_addr_port[32], dnat_new_addr_port[32];
char dnat_orig_addr[32], dnat_orig_port[32], dnat_new_addr[32], dnat_new_port[32];
FILE *file = NULL;
if(proxychains_got_chain_data)
return;
load_default_settings(ct);
env = get_config_path(getenv(PROXYCHAINS_CONF_FILE_ENV_VAR), buff, sizeof(buff));
file = fopen(env, "r");
while(fgets(buff, sizeof(buff), file)) {
if(buff[0] != '\n' && buff[strspn(buff, " ")] != '#') {
/* proxylist has to come last */
if(list) {
if(count >= MAX_CHAIN)
break;
memset(&pd[count], 0, sizeof(proxy_data));
pd[count].ps = PLAY_STATE;
port_n = 0;
sscanf(buff, "%s %s %d %s %s", type, host, &port_n, pd[count].user, pd[count].pass);
pd[count].ip.as_int = (uint32_t) inet_addr(host);
pd[count].port = htons((unsigned short) port_n);
if(!strcmp(type, "http")) {
pd[count].pt = HTTP_TYPE;
} else if(!strcmp(type, "raw")) {
pd[count].pt = RAW_TYPE;
} else if(!strcmp(type, "socks4")) {
pd[count].pt = SOCKS4_TYPE;
} else if(!strcmp(type, "socks5")) {
pd[count].pt = SOCKS5_TYPE;
} else
continue;
if(pd[count].ip.as_int && port_n && pd[count].ip.as_int != (uint32_t) - 1)
count++;
} else {
if(strstr(buff, "[ProxyList]")) {
list = 1;
} else if(strstr(buff, "random_chain")) {
*ct = RANDOM_TYPE;
} else if(strstr(buff, "strict_chain")) {
*ct = STRICT_TYPE;
} else if(strstr(buff, "dynamic_chain")) {
*ct = DYNAMIC_TYPE;
} else if(strstr(buff, "tcp_read_time_out")) {
sscanf(buff, "%s %d", user, &tcp_read_time_out);
} else if(strstr(buff, "tcp_connect_time_out")) {
sscanf(buff, "%s %d", user, &tcp_connect_time_out);
} else if(strstr(buff, "remote_dns_subnet")) {
sscanf(buff, "%s %d", user, &remote_dns_subnet);
if(remote_dns_subnet >= 256) {
fprintf(stderr,
"remote_dns_subnet: invalid value. requires a number between 0 and 255.\n");
exit(1);
}
} else if(strstr(buff, "localnet")) {
if(sscanf(buff, "%s %21[^/]/%15s", user, local_in_addr_port, local_netmask) < 3) {
fprintf(stderr, "localnet format error");
exit(1);
}
/* clean previously used buffer */
memset(local_in_port, 0, sizeof(local_in_port) / sizeof(local_in_port[0]));
if(sscanf(local_in_addr_port, "%15[^:]:%5s", local_in_addr, local_in_port) < 2) {
PDEBUG("added localnet: netaddr=%s, netmask=%s\n",
local_in_addr, local_netmask);
} else {
PDEBUG("added localnet: netaddr=%s, port=%s, netmask=%s\n",
local_in_addr, local_in_port, local_netmask);
}
if(num_localnet_addr < MAX_LOCALNET) {
int error;
error =
inet_pton(AF_INET, local_in_addr,
&localnet_addr[num_localnet_addr].in_addr);
if(error <= 0) {
fprintf(stderr, "localnet address error\n");
exit(1);
}
error =
inet_pton(AF_INET, local_netmask,
&localnet_addr[num_localnet_addr].netmask);
if(error <= 0) {
fprintf(stderr, "localnet netmask error\n");
exit(1);
}
if(local_in_port[0]) {
localnet_addr[num_localnet_addr].port =
(unsigned short) atoi(local_in_port);
} else {
localnet_addr[num_localnet_addr].port = 0;
}
++num_localnet_addr;
} else {
fprintf(stderr, "# of localnet exceed %d.\n", MAX_LOCALNET);
}
} else if(strstr(buff, "chain_len")) {
char *pc;
int len;
pc = strchr(buff, '=');
len = atoi(++pc);
proxychains_max_chain = (unsigned int) (len ? len : 1);
} else if(strstr(buff, "quiet_mode")) {
proxychains_quiet_mode = 1;
} else if(strstr(buff, "proxy_dns")) {
proxychains_resolver = 1;
} else if(strstr(buff, "dnat")) {
if(sscanf(buff, "%s %21[^ ] %21s\n", user, dnat_orig_addr_port, dnat_new_addr_port) < 3) {
fprintf(stderr, "dnat format error");
exit(1);
}
/* clean previously used buffer */
memset(dnat_orig_port, 0, sizeof(dnat_orig_port) / sizeof(dnat_orig_port[0]));
memset(dnat_new_port, 0, sizeof(dnat_new_port) / sizeof(dnat_new_port[0]));
(void)sscanf(dnat_orig_addr_port, "%15[^:]:%5s", dnat_orig_addr, dnat_orig_port);
(void)sscanf(dnat_new_addr_port, "%15[^:]:%5s", dnat_new_addr, dnat_new_port);
if(num_dnats < MAX_DNAT) {
int error;
error =
inet_pton(AF_INET, dnat_orig_addr,
&dnats[num_dnats].orig_dst);
if(error <= 0) {
fprintf(stderr, "dnat original destination address error\n");
exit(1);
}
error =
inet_pton(AF_INET, dnat_new_addr,
&dnats[num_dnats].new_dst);
if(error <= 0) {
fprintf(stderr, "dnat effective destination address error\n");
exit(1);
}
if(dnat_orig_port[0]) {
dnats[num_dnats].orig_port =
(unsigned short) atoi(dnat_orig_port);
} else {
dnats[num_dnats].orig_port = 0;
}
if(dnat_new_port[0]) {
dnats[num_dnats].new_port =
(unsigned short) atoi(dnat_new_port);
} else {
dnats[num_dnats].new_port = 0;
}
PDEBUG("added dnat: orig-dst=%s orig-port=%d new-dst=%s new-port=%d\n", dnat_orig_addr, dnats[num_dnats].orig_port, dnat_new_addr, dnats[num_dnats].new_port);
++num_dnats;
} else {
fprintf(stderr, "# of dnat exceed %d.\n", MAX_DNAT);
}
}
}
}
}
fclose(file);
*proxy_count = count;
proxychains_got_chain_data = 1;
}
static void simple_socks5_env(proxy_data *pd, unsigned int *proxy_count, chain_type *ct) {
char *port_string;
char *host_string;
if(proxychains_got_chain_data)
return;
load_default_settings(ct);
port_string = getenv(PROXYCHAINS_SOCKS5_PORT_ENV_VAR);
if(!port_string)
return;
host_string = getenv(PROXYCHAINS_SOCKS5_HOST_ENV_VAR);
if(!host_string)
host_string = "127.0.0.1";
memset(pd, 0, sizeof(proxy_data));
pd[0].ps = PLAY_STATE;
pd[0].ip.as_int = (uint32_t) inet_addr(host_string);
pd[0].port = htons((unsigned short) strtol(port_string, NULL, 0));
pd[0].pt = SOCKS5_TYPE;
proxychains_max_chain = 1;
if(getenv(PROXYCHAINS_DNS_ENV_VAR))
proxychains_resolver = 1;
*proxy_count = 1;
proxychains_got_chain_data = 1;
}
/******* HOOK FUNCTIONS *******/
int connect(int sock, const struct sockaddr *addr, socklen_t len) {
int socktype = 0, flags = 0, ret = 0;
socklen_t optlen = 0;
ip_type dest_ip;
#ifdef DEBUG
char str[256];
#endif
struct in_addr *p_addr_in;
struct sockaddr_in new_addr;
dnat_arg *dnat = NULL;
unsigned short port;
size_t i;
int remote_dns_connect = 0;
INIT();
optlen = sizeof(socktype);
getsockopt(sock, SOL_SOCKET, SO_TYPE, &socktype, &optlen);
if(!(SOCKFAMILY(*addr) == AF_INET && socktype == SOCK_STREAM))
return true_connect(sock, addr, len);
p_addr_in = &((struct sockaddr_in *) addr)->sin_addr;
port = ntohs(((struct sockaddr_in *) addr)->sin_port);
#ifdef DEBUG
// PDEBUG("localnet: %s; ", inet_ntop(AF_INET,&in_addr_localnet, str, sizeof(str)));
// PDEBUG("netmask: %s; " , inet_ntop(AF_INET, &in_addr_netmask, str, sizeof(str)));
PDEBUG("target: %s\n", inet_ntop(AF_INET, p_addr_in, str, sizeof(str)));
PDEBUG("port: %d\n", port);
#endif
// check if connect called from proxydns
remote_dns_connect = (ntohl(p_addr_in->s_addr) >> 24 == remote_dns_subnet);
// more specific first
for(i = 0; i < num_dnats && !remote_dns_connect && !dnat; i++)
if(dnats[i].orig_dst.s_addr == p_addr_in->s_addr)
if(dnats[i].orig_port && (dnats[i].orig_port == port))
dnat = &dnats[i];
for(i = 0; i < num_dnats && !remote_dns_connect && !dnat; i++)
if(dnats[i].orig_dst.s_addr == p_addr_in->s_addr)
if(!dnats[i].orig_port)
dnat = &dnats[i];
if (dnat) {
if (dnat->new_port)
new_addr.sin_port = htons(dnat->new_port);
else
new_addr.sin_port = htons(port);
new_addr.sin_addr = dnat->new_dst;
addr = (struct sockaddr *)&new_addr;
p_addr_in = &((struct sockaddr_in *) addr)->sin_addr;
port = ntohs(((struct sockaddr_in *) addr)->sin_port);
}
for(i = 0; i < num_localnet_addr && !remote_dns_connect; i++) {
if((localnet_addr[i].in_addr.s_addr & localnet_addr[i].netmask.s_addr)
== (p_addr_in->s_addr & localnet_addr[i].netmask.s_addr)) {
if(!localnet_addr[i].port || localnet_addr[i].port == port) {
PDEBUG("accessing localnet using true_connect\n");
return true_connect(sock, addr, len);
}
}
}
flags = fcntl(sock, F_GETFL, 0);
if(flags & O_NONBLOCK)
fcntl(sock, F_SETFL, !O_NONBLOCK);
dest_ip.as_int = SOCKADDR(*addr);
ret = connect_proxy_chain(sock,
dest_ip,
SOCKPORT(*addr),
proxychains_pd, proxychains_proxy_count, proxychains_ct, proxychains_max_chain);
fcntl(sock, F_SETFL, flags);
if(ret != SUCCESS)
errno = ECONNREFUSED;
return ret;
}
static struct gethostbyname_data ghbndata;
struct hostent *gethostbyname(const char *name) {
INIT();
PDEBUG("gethostbyname: %s\n", name);
if(proxychains_resolver)
return proxy_gethostbyname(name, &ghbndata);
else
return true_gethostbyname(name);
return NULL;
}
int getaddrinfo(const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res) {
int ret = 0;
INIT();
PDEBUG("getaddrinfo: %s %s\n", node, service);
if(proxychains_resolver)
ret = proxy_getaddrinfo(node, service, hints, res);
else
ret = true_getaddrinfo(node, service, hints, res);
return ret;
}
void freeaddrinfo(struct addrinfo *res) {
INIT();
PDEBUG("freeaddrinfo %p \n", res);
if(!proxychains_resolver)
true_freeaddrinfo(res);
else
proxy_freeaddrinfo(res);
return;
}
// work around a buggy prototype in GLIBC. according to the bugtracker it has been fixed in git at 02 May 2011.
// 2.14 came out in June 2011 so that should be the first fixed version
#if defined(__GLIBC__) && (__GLIBC__ < 3) && (__GLIBC_MINOR__ < 14)
int getnameinfo(const struct sockaddr *sa,
socklen_t salen, char *host, socklen_t hostlen, char *serv, socklen_t servlen, unsigned int flags)
#else
int getnameinfo(const struct sockaddr *sa,
socklen_t salen, char *host, socklen_t hostlen, char *serv, socklen_t servlen, int flags)
#endif
{
char ip_buf[16];
int ret = 0;
INIT();
PDEBUG("getnameinfo: %s %s\n", host, serv);
if(!proxychains_resolver) {
ret = true_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
} else {
if(hostlen) {
inet_ntop(AF_INET, (unsigned char*) &(SOCKADDR_2(*sa)), ip_buf, sizeof(ip_buf));
strncpy(host, ip_buf, hostlen);
}
if(servlen)
snprintf(serv, servlen, "%d", ntohs(SOCKPORT(*sa)));
}
return ret;
}
#if (defined __linux__) || (defined __APPLE__)
struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) {
#else
struct hostent *gethostbyaddr(const char *addr, socklen_t len, int type) {
#endif
static char buf[16];
static char ipv4[4];
static char *list[2];
static struct hostent he;
INIT();
PDEBUG("TODO: proper gethostbyaddr hook\n");
if(!proxychains_resolver)
return true_gethostbyaddr(addr, len, type);
else {
PDEBUG("len %u\n", len);
if(len != 4)
return NULL;
he.h_name = buf;
memcpy(ipv4, addr, 4);
list[0] = ipv4;
list[1] = NULL;
he.h_addr_list = list;
he.h_addrtype = AF_INET;
he.h_aliases = NULL;
he.h_length = 4;
inet_ntop(AF_INET, addr, buf, sizeof(buf));
return &he;
}
return NULL;
}
================================================
FILE: src/main.c
================================================
/* (C) 2011, 2012 rofl0r
* *
* 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. *
* *
***************************************************************************/
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#undef _XOPEN_SOURCE
#define _XOPEN_SOURCE 700
#include <sys/types.h>
#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include "common.h"
static int usage(char **argv) {
printf( "\nProxychains4: %d.%d.%d\n"
"Usage:\t%s -q -f config_file program_name [arguments]\n"
"\t-v print version and exit\n"
"\t-q makes proxychains quiet - this overrides the config setting\n"
"\t-f allows to manually specify a configfile to use\n"
"\n\tfor example : proxychains telnet somehost.com\n"
"\n\tMore help in README file\n\n", PROXYCHAINS_VERSION_MAJOR,
PROXYCHAINS_VERSION_MINOR, PROXYCHAINS_VERSION_BUGFIX, argv[0]);
return EXIT_FAILURE;
}
static const char *dll_name = DLL_NAME;
static char own_dir[256];
static const char *dll_dirs[] = {
//".",
own_dir,
LIB_DIR,
"/lib",
"/usr/lib",
"/usr/local/lib",
"/lib64",
NULL
};
static void set_own_dir(const char *argv0) {
size_t l = strlen(argv0);
while(l && argv0[l - 1] != '/')
l--;
if(l == 0)
//memcpy(own_dir, ".", 2);
memcpy(own_dir, "/dev/null/", 2);
else {
memcpy(own_dir, argv0, l - 1);
own_dir[l] = 0;
}
}
#define MAX_COMMANDLINE_FLAGS 2
int main(int argc, char *argv[]) {
char *path = NULL;
char buf[PATH_MAX];
char pbuf[PATH_MAX];
int start_argv = 1;
int quiet = 0;
size_t i;
const char *prefix = NULL;
for(i = 0; i < MAX_COMMANDLINE_FLAGS; i++) {
if(start_argv < argc && argv[start_argv][0] == '-') {
if(argv[start_argv][1] == 'q') {
quiet = 1;
start_argv++;
} else if(argv[start_argv][1] == 'v') {
printf("Proxychains4 version: %d.%d.%d\n", PROXYCHAINS_VERSION_MAJOR, PROXYCHAINS_VERSION_MINOR, PROXYCHAINS_VERSION_BUGFIX);
exit(EXIT_SUCCESS);
} else if(argv[start_argv][1] == 'f') {
if(start_argv + 1 < argc)
path = argv[start_argv + 1];
else
return usage(argv);
start_argv += 2;
}
} else
break;
}
if(start_argv >= argc)
return usage(argv);
/* check if path of config file has not been passed via command line */
path = get_config_path(path, pbuf, sizeof(pbuf));
if(!quiet)
fprintf(stderr, LOG_PREFIX "config file found: %s\n", path);
/* Set PROXYCHAINS_CONF_FILE to get proxychains lib to use new config file. */
setenv(PROXYCHAINS_CONF_FILE_ENV_VAR, path, 1);
if(quiet)
setenv(PROXYCHAINS_QUIET_MODE_ENV_VAR, "1", 1);
// search DLL
set_own_dir(argv[0]);
i = 0;
while(dll_dirs[i]) {
snprintf(buf, sizeof(buf), "%s/%s", dll_dirs[i], dll_name);
if(access(buf, R_OK) != -1) {
prefix = dll_dirs[i];
break;
}
i++;
}
if(!prefix) {
fprintf(stderr, "couldn't locate %s\n", dll_name);
return EXIT_FAILURE;
}
if(!quiet)
fprintf(stderr, LOG_PREFIX "preloading %s/%s\n", prefix, dll_name);
#ifndef IS_MAC
snprintf(buf, sizeof(buf), "%s/%s", prefix, dll_name);
setenv("LD_PRELOAD", buf, 1);
#else
snprintf(buf, sizeof(buf), "%s/%s", prefix, dll_name);
setenv("DYLD_INSERT_LIBRARIES", buf, 1);
setenv("DYLD_FORCE_FLAT_NAMESPACE", "1", 1);
#endif
execvp(argv[start_argv], &argv[start_argv]);
perror("proxychains can't load process....");
return EXIT_FAILURE;
}
================================================
FILE: src/proxychains
================================================
#!/bin/sh
echo "ProxyChains-4.0 (https://github.com/haad/proxychains)"
usage() {
echo " usage:"
echo " $0 [hqv] [-f config-file] <prog> [args]"
echo " -q make proxychains quiet"
exit
}
find_proxy_conf() {
show_proxy_env
if [ -f "/usr/local/etc/proxychains.conf" ]; then
export PROXYCHAINS_CONF_FILE="/usr/local/etc/proxychains.conf"
else
if [ -f "/etc/proxychains.conf" ];then
PROXYCHAINS_CONF_FILE="/etc/proxychains.conf"
fi
fi
}
#
# XXX We should not overide possible user settings here. Just add libproxychains to it.
#
setup_proxy_env() {
if [ -z "$PROXYCHAINS_CONF_FILE" ]; then
find_proxy_conf
fi
if [ $(uname -s) = "Darwin" ]; then
export DYLD_FORCE_FLAT_NAMESPACE=
export DYLD_INSERT_LIBRARIES=libproxychains4.dylib
else
export LD_PRELOAD=libproxychains.so.4
fi
}
disable_proxy_env() {
if [ $(uname -s) = "Darwin" ]; then
unset DYLD_FORCE_FLAT_NAMESPACE
export DYLD_INSERT_LIBRARIES=$(echo $DYLD_INSERT_LIBRARIES | sed -e 's/libproxychains4.dylib//g')
if [ -z $DYLD_INSERT_LIBRARIES ]; then
unset DYLD_INSERT_LIBRARIES
fi
else
export LD_PRELOAD=$(echo $DYLD_INSERT_LIBRARIES | sed -e 's/libproxychains.so.4//g')
if [ -z $LD_PRELOAD ]; then
unset LD_PRELOAD
fi
fi
}
show_proxy_env() {
echo "Proxified environment setup"
echo "PROXYCHAINS_CONF_FILE = $PROXYCHAINS_CONF_FILE"
if [ $(uname -s) = "Darwin" ]; then
echo "DYLD_FORCE_FLAT_NAMESPACE = $DYLD_FORCE_FLAT_NAMESPACE"
echo "DYLD_INSERT_LIBRARIES = $DYLD_INSERT_LIBRARIES"
else
echo "LD_PRELOAD = $LD_PRELOAD"
fi
}
if [ $# = 0 ] ; then
usage
fi
case "$1" in
-h)
usage
;;
-f)
export PROXYCHAINS_CONF_FILE=$2;
shift;
shift;
;;
-q)
export PROXYCHAINS_QUIET_MODE=1;
shift;
;;
show)
show_proxy_env
return
;;
esac
case "$1" in
on)
setup_proxy_env
show_proxy_env
;;
off)
disable_proxy_env
show_proxy_env
;;
*)
setup_proxy_env
exec "$@"
;;
esac
================================================
FILE: src/proxychains.conf
================================================
# proxychains.conf VER 4
#
# HTTP, SOCKS4, SOCKS5 tunneling proxifier with DNS.
#
# The option below identifies how the ProxyList is treated.
# only one option should be uncommented at time,
# otherwise the last appearing option will be accepted
#
#dynamic_chain
#
# Dynamic - Each connection will be done via chained proxies
# all proxies chained in the order as they appear in the list
# at least one proxy must be online to play in chain
# (dead proxies are skipped)
# otherwise EINTR is returned to the app
#
strict_chain
#
# Strict - Each connection will be done via chained proxies
# all proxies chained in the order as they appear in the list
# all proxies must be online to play in chain
# otherwise EINTR is returned to the app
#
#random_chain
#
# Random - Each connection will be done via random proxy
# (or proxy chain, see chain_len) from the list.
# this option is good to test your IDS :)
# Make sense only if random_chain
#chain_len = 2
# Quiet mode (no output from library)
#quiet_mode
# Proxy DNS requests - no leak for DNS data
proxy_dns
# set the class A subnet number to usefor use of the internal remote DNS mapping
# we use the reserved 224.x.x.x range by default,
# if the proxified app does a DNS request, we will return an IP from that range.
# on further accesses to this ip we will send the saved DNS name to the proxy.
# in case some control-freak app checks the returned ip, and denies to
# connect, you can use another subnet, e.g. 10.x.x.x or 127.x.x.x.
# of course you should make sure that the proxified app does not need
# *real* access to this subnet.
# i.e. dont use the same subnet then in the localnet section
#remote_dns_subnet 127
#remote_dns_subnet 10
remote_dns_subnet 224
# Some timeouts in milliseconds
tcp_read_time_out 15000
tcp_connect_time_out 8000
# By default enable localnet for loopback address ranges
# RFC5735 Loopback address range
localnet 127.0.0.0/255.0.0.0
# RFC1918 Private Address Ranges
# localnet 10.0.0.0/255.0.0.0
# localnet 172.16.0.0/255.240.0.0
# localnet 192.168.0.0/255.255.0.0
# Example for localnet exclusion
## Exclude connections to 192.168.1.0/24 with port 80
# localnet 192.168.1.0:80/255.255.255.0
## Exclude connections to 192.168.100.0/24
# localnet 192.168.100.0/255.255.255.0
## Exclude connections to ANYwhere with port 80
# localnet 0.0.0.0:80/0.0.0.0
### Examples for dnat
## Trying to proxy connections to destinations which are dnatted,
## will result in proxying connections to the new given destinations.
## Whenever I connect to 1.1.1.1 on port 1234 actually connect to 1.1.1.2 on port 443
# dnat 1.1.1.1:1234 1.1.1.2:443
## Whenever I connect to 1.1.1.1 on port 443 actually connect to 1.1.1.2 on port 443
## (no need to write :443 again)
# dnat 1.1.1.2:443 1.1.1.2
## No matter what port I connect to on 1.1.1.1 port actually connect to 1.1.1.2 on port 443
# dnat 1.1.1.1 1.1.1.2:443
## Always, instead of connecting to 1.1.1.1, connect to 1.1.1.2
# dnat 1.1.1.1 1.1.1.2
# ProxyList format
# type host port [user pass]
# (values separated by 'tab' or 'blank')
#
#
# Examples:
#
# socks5 192.168.67.78 1080 lamer secret
# http 192.168.89.3 8080 justu hidden
# socks4 192.168.1.49 1080
# http 192.168.39.93 8080
#
#
# proxy types: http, socks4, socks5, raw
# * raw: The traffic is simply forwarded to the proxy without modification.
# ( auth types supported: "basic"-http "user/pass"-socks )
#
[ProxyList]
# add proxy here ...
# meanwhile
# defaults set to "tor"
socks4 127.0.0.1 9050
================================================
FILE: src/proxyresolv
================================================
#!/bin/sh
# This script is called by proxychains to resolve DNS names
# DNS server used to resolve names
if [ -z "$PROXY_DNS_SERVER" ] ; then
DNS_SERVER=208.67.222.222 # OpenDNS
else
DNS_SERVER=$PROXY_DNS_SERVER
fi
if [ $# = 0 ] ; then
echo " usage:"
echo " proxyresolv <hostname> "
exit
fi
awk 'BEGIN{ARGC=0} {for(i=2;i<=NF;i++){if($i==ARGV[1] && $1!~":"){print $1;found=1}} } END{exit found?0:1}' "$1" </etc/hosts
if [ "$?" -eq "0" ]; then
exit
fi
export LD_PRELOAD=libproxychains.so
drill $1 @$DNS_SERVER -t | awk '/A.+[0-9]+\.[0-9]+\.[0-9]/{print $5;}'
================================================
FILE: tests/test_getaddrinfo.c
================================================
#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#ifndef NI_MAXHOST
#define NI_MAXHOST 1025
#endif
int main(void) {
struct addrinfo *result;
struct addrinfo *res;
int error;
/* resolve the domain name into a list of addresses */
error = getaddrinfo("www.example.com", NULL, NULL, &result);
if (error != 0)
{
fprintf(stderr, "error in getaddrinfo: %s\n", gai_strerror(error));
return EXIT_FAILURE;
}
/* loop over all returned results and do inverse lookup */
for (res = result; res != NULL; res = res->ai_next)
{
char hostname[NI_MAXHOST] = "";
error = getnameinfo(res->ai_addr, res->ai_addrlen, hostname, NI_MAXHOST, NULL, 0, 0);
if (error != 0)
{
fprintf(stderr, "error in getnameinfo: %s\n", gai_strerror(error));
continue;
}
if (*hostname != '\0')
printf("hostname: %s\n", hostname);
}
freeaddrinfo(result);
return EXIT_SUCCESS;
}
gitextract_ck5mye_z/
├── AUTHORS
├── COPYING
├── ChangeLog
├── Makefile
├── README.md
├── TODO
├── completions/
│ └── zsh/
│ └── _proxychains4
├── configure
├── dist/
│ └── proxychains.conf
├── proxychains.lsm
├── src/
│ ├── common.c
│ ├── common.h
│ ├── core.c
│ ├── core.h
│ ├── libproxychains.c
│ ├── main.c
│ ├── proxychains
│ ├── proxychains.conf
│ └── proxyresolv
└── tests/
└── test_getaddrinfo.c
SYMBOL INDEX (74 symbols across 6 files)
FILE: src/common.c
function check_path (line 7) | static int check_path(char *path) {
FILE: src/core.c
function dalias_hash (line 58) | uint32_t dalias_hash(char *s0) {
function index_from_internal_ip (line 68) | uint32_t index_from_internal_ip(ip_type internalip) {
function in_addr_t (line 86) | in_addr_t make_internal_ip(uint32_t index) {
function poll_retry (line 100) | static int poll_retry(struct pollfd *fds, nfds_t nfsd, int timeout)
function encode_base_64 (line 126) | static void encode_base_64(char *src, char *dest, int max_len) {
function proxychains_write_log (line 163) | void proxychains_write_log(char *str, ...) {
function write_n_bytes (line 175) | static size_t write_n_bytes(int fd, char *buff, size_t size) {
function read_n_bytes (line 188) | static size_t read_n_bytes(int fd, char *buff, size_t size) {
function timed_connect (line 204) | static int timed_connect(int sock, const struct sockaddr *addr, socklen_...
function tunnel_to (line 246) | static int tunnel_to(int sock, ip_type ip, unsigned short port, proxy_ty...
function start_chain (line 491) | static int start_chain(int *fd, proxy_data * pd, char *begin_mark) {
function get_rand_int (line 521) | unsigned int get_rand_int(unsigned int range){
function proxy_data (line 535) | static proxy_data *select_proxy(select_type how, proxy_data * pd, unsign...
function release_all (line 564) | static void release_all(proxy_data * pd, unsigned int proxy_count) {
function release_busy (line 571) | static void release_busy(proxy_data * pd, unsigned int proxy_count) {
function calc_alive (line 579) | static unsigned int calc_alive(proxy_data * pd, unsigned int proxy_count) {
function chain_step (line 588) | static int chain_step(int ns, proxy_data * pfrom, proxy_data * pto) {
function connect_proxy_chain (line 625) | int connect_proxy_chain(int sock, ip_type target_ip,
type hostent (line 743) | struct hostent
type gethostbyname_data (line 743) | struct gethostbyname_data
type hostent (line 749) | struct hostent
type addrinfo_data (line 845) | struct addrinfo_data {
function proxy_freeaddrinfo (line 851) | void proxy_freeaddrinfo(struct addrinfo *res) {
function proxy_getservbyname (line 855) | void proxy_getservbyname(const char * service, struct servent *se_buf,
function proxy_getaddrinfo (line 881) | int proxy_getaddrinfo(const char *node, const char *service, const struc...
FILE: src/core.h
type ip_type (line 25) | typedef union {
type string_hash_tuple (line 30) | typedef struct {
type internal_ip_lookup_table (line 35) | typedef struct {
type ERR_CODE (line 59) | typedef enum {
type proxy_type (line 68) | typedef enum {
type chain_type (line 75) | typedef enum {
type proxy_state (line 81) | typedef enum {
type select_type (line 88) | typedef enum {
type localaddr_arg (line 93) | typedef struct {
type dnat_arg (line 98) | typedef struct {
type proxy_data (line 103) | typedef struct {
type sockaddr (line 117) | struct sockaddr
type hostent (line 118) | struct hostent
type addrinfo (line 119) | struct addrinfo
type hostent (line 122) | struct hostent
type hostent (line 124) | struct hostent
type addrinfo (line 127) | struct addrinfo
type addrinfo (line 128) | struct addrinfo
type sockaddr (line 129) | struct sockaddr
type gethostbyname_data (line 140) | struct gethostbyname_data {
type hostent (line 147) | struct hostent
type gethostbyname_data (line 147) | struct gethostbyname_data
type servent (line 148) | struct servent
type servent (line 148) | struct servent
type addrinfo (line 149) | struct addrinfo
type addrinfo (line 149) | struct addrinfo
type addrinfo (line 150) | struct addrinfo
FILE: src/libproxychains.c
function do_init (line 101) | static void do_init(void) {
function init_lib_wrapper (line 124) | static void init_lib_wrapper(const char* caller) {
function gcc_init (line 144) | __attribute__((constructor))
function FILE (line 150) | FILE *
function load_default_settings (line 173) | static void load_default_settings(chain_type *ct) {
function get_chain_data (line 186) | static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, c...
function simple_socks5_env (line 364) | static void simple_socks5_env(proxy_data *pd, unsigned int *proxy_count,...
function connect (line 400) | int connect(int sock, const struct sockaddr *addr, socklen_t len) {
type gethostbyname_data (line 483) | struct gethostbyname_data
type hostent (line 484) | struct hostent
function getaddrinfo (line 497) | int getaddrinfo(const char *node, const char *service, const struct addr...
function freeaddrinfo (line 512) | void freeaddrinfo(struct addrinfo *res) {
type sockaddr (line 527) | struct sockaddr
function getnameinfo (line 530) | int getnameinfo(const struct sockaddr *sa,
type hostent (line 555) | struct hostent
type hostent (line 557) | struct hostent
type hostent (line 562) | struct hostent
FILE: src/main.c
function usage (line 28) | static int usage(char **argv) {
function set_own_dir (line 54) | static void set_own_dir(const char *argv0) {
function main (line 69) | int main(int argc, char *argv[]) {
FILE: tests/test_getaddrinfo.c
function main (line 11) | int main(void) {
Condensed preview — 20 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (95K chars).
[
{
"path": "AUTHORS",
"chars": 394,
"preview": "original code\nN3E7CR34TUR3.\nhttp://proxychains.sourceforge.net\nnetcreature@users.sourceforge.net\n\nmain.c, remote-dns, th"
},
{
"path": "COPYING",
"chars": 15131,
"preview": "\t\t GNU GENERAL PUBLIC LICENSE\n\t\t Version 2, June 1991\n\n Copyright (C) 1989, 1991 Free Software Foundation, Inc."
},
{
"path": "ChangeLog",
"chars": 2197,
"preview": "ProxyChains version history (public releases)\n====================\n\nver 4.2\n\t* Introduce BSD support make proxychains av"
},
{
"path": "Makefile",
"chars": 2487,
"preview": "#\n# Makefile for proxychains (requires GNU make), stolen from musl\n#\n# Use config.mak to override any of the following v"
},
{
"path": "README.md",
"chars": 5888,
"preview": "# ProxyChains ver. 4.3.0 README\n\n![build-badge](https://github.com/haad/proxychains/actions/workflows/buildci.yml/badge."
},
{
"path": "TODO",
"chars": 178,
"preview": "ProxyChains ver 4.0 TODO\n===================\n\n- hooks for reentrant dns functions, i.e. gethostbyaddr_r\n- shadowsocks su"
},
{
"path": "completions/zsh/_proxychains4",
"chars": 81,
"preview": "#compdef proxychains4\n\n_arguments -s -S '1: :{_command_names -e}' '*:: :_normal'\n"
},
{
"path": "configure",
"chars": 2610,
"preview": "#!/bin/sh\n\nprefix=/usr/local\ndevelflg=0\n\nusage() {\n\techo \"supported arguments\"\n\techo \"--prefix=/path \t\tdefault: $prefix\""
},
{
"path": "dist/proxychains.conf",
"chars": 222,
"preview": "strict_chain\n#proxy_dns\n#remote_dns_subnet 224\ntcp_read_time_out 15000\ntcp_connect_time_out 8000\n\nlocalnet 127.0.0.0/255"
},
{
"path": "proxychains.lsm",
"chars": 318,
"preview": "Begin3\nTitle: ProxyChains\nVersion: 4.3\nEntered-date:\nDescription:\nKeywords:\nAuthor: <N37CR347UR"
},
{
"path": "src/common.c",
"chars": 1230,
"preview": "#include \"common.h\"\n\n#include <stdlib.h>\n#include <unistd.h>\n#include <stdio.h>\n\nstatic int check_path(char *path) {\n\tif"
},
{
"path": "src/common.h",
"chars": 596,
"preview": "#define PROXYCHAINS_CONF_FILE_ENV_VAR \"PROXYCHAINS_CONF_FILE\"\n#define PROXYCHAINS_QUIET_MODE_ENV_VAR \"PROXYCHAINS_QUIET_"
},
{
"path": "src/core.c",
"chars": 23146,
"preview": "/***************************************************************************\n core.c - descri"
},
{
"path": "src/core.h",
"chars": 4419,
"preview": "/***************************************************************************\n core.h - descri"
},
{
"path": "src/libproxychains.c",
"chars": 17173,
"preview": "/***************************************************************************\n libproxychains.c "
},
{
"path": "src/main.c",
"chars": 3827,
"preview": "/* (C) 2011, 2012 rofl0r\n * *\n * This progra"
},
{
"path": "src/proxychains",
"chars": 1930,
"preview": "#!/bin/sh\necho \"ProxyChains-4.0 (https://github.com/haad/proxychains)\"\n\nusage() {\n\n\techo \"\tusage:\"\n\techo \"\t$0 [hqv] [-f "
},
{
"path": "src/proxychains.conf",
"chars": 3580,
"preview": "# proxychains.conf VER 4\n#\n# HTTP, SOCKS4, SOCKS5 tunneling proxifier with DNS.\n#\t\n\n# The option below identifie"
},
{
"path": "src/proxyresolv",
"chars": 584,
"preview": "#!/bin/sh\n# This script is called by proxychains to resolve DNS names\n\n# DNS server used to resolve names\n\nif [ -z \"$PRO"
},
{
"path": "tests/test_getaddrinfo.c",
"chars": 956,
"preview": "#include <stdio.h>\n#include <stdlib.h>\n#include <netdb.h>\n#include <netinet/in.h>\n#include <sys/socket.h>\n \n#ifndef NI"
}
]
About this extraction
This page contains the full source code of the haad/proxychains GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 20 files (84.9 KB), approximately 24.8k tokens, and a symbol index with 74 extracted functions, classes, methods, constants, and types. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
Extracted by GitExtract — free GitHub repo to text converter for AI. Built by Nikandr Surkov.