Delete binary file.

Conflicts:
	Makefile
	src/core.c
	src/core.h
	src/libproxychains.c
	src/main.c

.gitignore

@@ -0,0 +1,11 @@
+*.o
+*.so
+*.la
+*.lo
+.deps/
+.libs/
+
+# Autoconf stuff 
+libtool
+config.*
+stamp-h

AUTHORS

@@ -0,0 +1,16 @@
+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
+adam hamsik.
+https://github.com/haad/proxychains
+
+localnet-port, bugfixes
+jianing yang.
+https://github.com/jianingy/proxychains

COPYING

@@ -0,0 +1,280 @@
+		    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
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
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+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
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+
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+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
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+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
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+
+  Finally, any free program is threatened constantly by software
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+  The precise terms and conditions for copying, distribution and
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+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+
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+
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+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
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+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS

ChangeLog

@@ -0,0 +1,65 @@
+ProxyChains version history (public releases)
+====================
+
+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.

Makefile

@@ -0,0 +1,71 @@
+#
+# 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
+
+exec_prefix = $(prefix)
+bindir = $(exec_prefix)/bin
+
+SRCS = $(sort $(wildcard src/*.c))
+OBJS = $(SRCS:.c=.o)
+LOBJS = src/core.o src/common.o src/libproxychains.o
+
+CCFLAGS  = -Wall -O0 -g -std=c99 -D_GNU_SOURCE -pipe -DTHREAD_SAFE -Werror 
+LDFLAGS = -shared -fPIC -ldl -lpthread
+INC     = 
+PIC     = -fPIC
+AR      = $(CROSS_COMPILE)ar
+RANLIB  = $(CROSS_COMPILE)ranlib
+
+LDSO_SUFFIX = so
+LD_SET_SONAME = -Wl,-soname=
+INSTALL_FLAGS = -D -m
+
+-include config.mak
+
+LDSO_PATHNAME = libproxychains4.$(LDSO_SUFFIX)
+
+SHARED_LIBS = $(LDSO_PATHNAME)
+ALL_LIBS = $(SHARED_LIBS)
+PXCHAINS = proxychains4
+ALL_TOOLS = $(PXCHAINS)
+
+
+CFLAGS+=$(USER_CFLAGS) $(MAC_CFLAGS)
+CFLAGS_MAIN=-DLIB_DIR=\"$(libdir)\" -DSYSCONFDIR=\"$(confdir)\" -DDLL_NAME=\"$(LDSO_PATHNAME)\"
+
+
+all: $(ALL_LIBS) $(ALL_TOOLS)
+
+install-config:
+	install -d $(DESTDIR)/$(confdir)
+	install $(INSTALL_FLAGS) 644 src/proxychains.conf $(DESTDIR)/$(confdir)/
+
+install: 
+	install -d $(DESTDIR)/$(bindir)/ $(DESTDIR)/$(libdir)/
+	install $(INSTALL_FLAGS) 755 $(ALL_TOOLS) $(DESTDIR)/$(bindir)/
+	install $(INSTALL_FLAGS) 644 $(ALL_LIBS) $(DESTDIR)/$(libdir)/
+
+clean:
+	rm -f $(ALL_LIBS)
+	rm -f $(ALL_TOOLS)
+	rm -f $(OBJS)
+
+%.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

README

@@ -0,0 +1,115 @@
+ProxyChains ver 4.0 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.
+
+*********** ATTENTION ***********
+
+  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 behaviour, 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 behaviour
+  seems pretty idiotic (doing a fork only for a DNS lookup), and irssi
+  is currently the only known affected program.
+
+*** Installation ***
+
+  # 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 ?
+1) When the only way to get "outside" from your LAN is through proxy server.
+2) To get out from behind restrictive firewall which filters outgoing ports.
+3) To use two (or more) proxies in chain:
+	like: your_host <--> proxy1 <--> proxy2 <--> target_host
+4) To "proxify" some program with no proxy support built-in (like telnet)
+5) Access intranet from outside via proxy.
+5) 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.insecire.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 config file in following order:
+1)	file listed in environment variable ${PROXYCHAINS_CONF_FILE} or
+	provided as a -f argument to proxychains script or binary.
+2)	./proxychains.conf
+3)	$(HOME)/.proxychains/proxychains.conf
+4)	/etc/proxychains.conf  **
+
+**see more in /etc/proxychains.conf
+
+Usage Example:
+
+	$ proxychains telnet targethost.com
+
+in this example it will run telnet through proxy(or chained proxies)
+specified by proxychains.conf
+
+Usage Example:
+
+      	$ proxychains -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
+

TODO

@@ -0,0 +1,7 @@
+ProxyChains ver 4.0 TODO
+===================
+
+	
+   hooks for reentrant dns functions, i.e. gethostbyaddr_r
+
+

configure

@@ -0,0 +1,88 @@
+#!/bin/sh
+
+prefix=/usr/local
+
+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 "--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`;;
+	--help) usage;;
+	esac
+}
+
+ismac() {
+	uname -s | grep Darwin
+}
+
+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
+
+echo CC?=$CC>config.mak
+[ -z "$CPPFLAGS" ] || echo CPPFLAGS?=$CPPFLAGS>>config.mak
+[ -z "$CFLAGS" ] || echo USER_CFLAGS?=$CFLAGS>>config.mak
+echo prefix=$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
+	echo LDSO_SUFFIX=dylib>>config.mak
+	echo MAC_CFLAGS+=-DIS_MAC=1>>config.mak
+	echo LD_SET_SONAME=-Wl,-install_name,>>config.mak
+	echo INSTALL_FLAGS=-m>>config.mak
+fi
+
+echo done, now run make \&\& make install
+

dist/config.mak

@@ -0,0 +1,11 @@
+### config.mak template for proxychains
+#######################################
+
+# just copy into proxychains root dir and adapt to your needs.
+
+prefix = /usr/local/
+libdir = $(prefix)/lib
+
+exec_prefix = /usr/local
+bindir = $(exec_prefix)/bin
+

index.html

@@ -1,74 +0,0 @@
-<!DOCTYPE html>
-<html>
-
-  <head>
-    <meta charset='utf-8' />
-    <meta http-equiv="X-UA-Compatible" content="chrome=1" />
-    <meta name="description" content="Proxychains : proxychains - a tool that forces any TCP connection made by any given application to follow through proxy like TOR or any other SOCKS4, SOCKS5 or HTTP(S) proxy.  Supported auth-types: &quot;user/pass&quot; for SOCKS4/5, &quot;basic&quot; for HTTP." />
-
-    <link rel="stylesheet" type="text/css" media="screen" href="stylesheets/stylesheet.css">
-
-    <title>Proxychains</title>
-  </head>
-
-  <body>
-
-    <!-- HEADER -->
-    <div id="header_wrap" class="outer">
-        <header class="inner">
-          <a id="forkme_banner" href="https://github.com/haad/proxychains">View on GitHub</a>
-
-          <h1 id="project_title">Proxychains</h1>
-          <h2 id="project_tagline">proxychains - a tool that forces any TCP connection made by any given application to follow through proxy like TOR or any other SOCKS4, SOCKS5 or HTTP(S) proxy.  Supported auth-types: &quot;user/pass&quot; for SOCKS4/5, &quot;basic&quot; for HTTP.</h2>
-
-            <section id="downloads">
-              <a class="zip_download_link" href="https://github.com/haad/proxychains/zipball/master">Download this project as a .zip file</a>
-              <a class="tar_download_link" href="https://github.com/haad/proxychains/tarball/master">Download this project as a tar.gz file</a>
-            </section>
-        </header>
-    </div>
-
-    <!-- MAIN CONTENT -->
-    <div id="main_content_wrap" class="outer">
-      <section id="main_content" class="inner">
-        <h3>Welcome to GitHub Pages.</h3>
-
-<p>This automatic page generator is the easiest way to create beautiful pages for all of your projects. Author your page content here using GitHub Flavored Markdown, select a template crafted by a designer, and publish. After your page is generated, you can check out the new branch:</p>
-
-<pre><code>$ cd your_repo_root/repo_name
-$ git fetch origin
-$ git checkout gh-pages
-</code></pre>
-
-<p>If you're using the GitHub for Mac, simply sync your repository and you'll see the new branch.</p>
-
-<h3>Designer Templates</h3>
-
-<p>We've crafted some handsome templates for you to use. Go ahead and continue to layouts to browse through them. You can easily go back to edit your page before publishing. After publishing your page, you can revisit the page generator and switch to another theme. Your Page content will be preserved if it remained markdown format.</p>
-
-<h3>Rather Drive Stick?</h3>
-
-<p>If you prefer to not use the automatic generator, push a branch named <code>gh-pages</code> to your repository to create a page manually. In addition to supporting regular HTML content, GitHub Pages support Jekyll, a simple, blog aware static site generator written by our own Tom Preston-Werner. Jekyll makes it easy to create site-wide headers and footers without having to copy them across every page. It also offers intelligent blog support and other advanced templating features.</p>
-
-<h3>Authors and Contributors</h3>
-
-<p>You can <a href="https://github.com/blog/821" class="user-mention">@mention</a> a GitHub username to generate a link to their profile. The resulting <code>&lt;a&gt;</code> element will link to the contributor's GitHub Profile. For example: In 2007, Chris Wanstrath (<a href="https://github.com/defunkt" class="user-mention">@defunkt</a>), PJ Hyett (<a href="https://github.com/pjhyett" class="user-mention">@pjhyett</a>), and Tom Preston-Werner (<a href="https://github.com/mojombo" class="user-mention">@mojombo</a>) founded GitHub.</p>
-
-<h3>Support or Contact</h3>
-
-<p>Having trouble with Pages? Check out the documentation at <a href="http://help.github.com/pages">http://help.github.com/pages</a> or contact <a href="mailto:support@github.com">support@github.com</a> and we’ll help you sort it out.</p>
-      </section>
-    </div>
-
-    <!-- FOOTER  -->
-    <div id="footer_wrap" class="outer">
-      <footer class="inner">
-        <p class="copyright">Proxychains maintained by <a href="https://github.com/haad">haad</a></p>
-        <p>Published with <a href="http://pages.github.com">GitHub Pages</a></p>
-      </footer>
-    </div>
-
-    
-
-  </body>
-</html>

javascripts/main.js

@@ -1 +0,0 @@
-console.log('This would be the main JS file.');

params.json

@@ -1 +0,0 @@
-{"note":"Don't delete this file! It's used internally to help with page regeneration.","google":"","name":"Proxychains","body":"### Welcome to GitHub Pages.\r\nThis automatic page generator is the easiest way to create beautiful pages for all of your projects. Author your page content here using GitHub Flavored Markdown, select a template crafted by a designer, and publish. After your page is generated, you can check out the new branch:\r\n\r\n```\r\n$ cd your_repo_root/repo_name\r\n$ git fetch origin\r\n$ git checkout gh-pages\r\n```\r\n\r\nIf you're using the GitHub for Mac, simply sync your repository and you'll see the new branch.\r\n\r\n### Designer Templates\r\nWe've crafted some handsome templates for you to use. Go ahead and continue to layouts to browse through them. You can easily go back to edit your page before publishing. After publishing your page, you can revisit the page generator and switch to another theme. Your Page content will be preserved if it remained markdown format.\r\n\r\n### Rather Drive Stick?\r\nIf you prefer to not use the automatic generator, push a branch named `gh-pages` to your repository to create a page manually. In addition to supporting regular HTML content, GitHub Pages support Jekyll, a simple, blog aware static site generator written by our own Tom Preston-Werner. Jekyll makes it easy to create site-wide headers and footers without having to copy them across every page. It also offers intelligent blog support and other advanced templating features.\r\n\r\n### Authors and Contributors\r\nYou can @mention a GitHub username to generate a link to their profile. The resulting `<a>` element will link to the contributor's GitHub Profile. For example: In 2007, Chris Wanstrath (@defunkt), PJ Hyett (@pjhyett), and Tom Preston-Werner (@mojombo) founded GitHub.\r\n\r\n### Support or Contact\r\nHaving trouble with Pages? Check out the documentation at http://help.github.com/pages or contact support@github.com and we’ll help you sort it out.","tagline":"proxychains - a tool that forces any TCP connection made by any given application to follow through proxy like TOR or any other SOCKS4, SOCKS5 or HTTP(S) proxy.  Supported auth-types: \"user/pass\" for SOCKS4/5, \"basic\" for HTTP."}

src/common.c

@@ -0,0 +1,54 @@
+#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))
+		goto have;
+	
+	// priority 1: env var PROXYCHAINS_CONF_FILE
+	path = getenv(PROXYCHAINS_CONF_FILE_ENV_VAR);
+	if(check_path(path))
+		goto have;
+
+	// 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))
+		goto have;
+
+	// 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))
+		goto have;
+
+	// priority 4: $SYSCONFDIR/proxychains.conf
+	path = SYSCONFDIR "/" PROXYCHAINS_CONF_FILE;
+	if(check_path(path))
+		goto have;
+
+	// priority 5: /etc/proxychains.conf
+	path = "/etc/" PROXYCHAINS_CONF_FILE;
+	if(check_path(path))
+		goto have;
+	
+	perror("couldnt find configuration file");
+	exit(1);
+	
+	return NULL;
+	have:
+	return path;
+}

src/common.h

@@ -0,0 +1,8 @@
+#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 LOG_PREFIX "[proxychains] "
+
+#include <stddef.h>
+
+char *get_config_path(char* default_path, char* pbuf, size_t bufsize);

src/core.c

@@ -0,0 +1,877 @@
+/***************************************************************************
+                          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 <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
+#include <pthread.h>
+pthread_mutex_t internal_ips_lock;
+#endif
+
+#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 = 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 = ((tv.tv_sec - start_time.tv_sec) * 1000 + (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, l, i;
+	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 int write_n_bytes(int fd, char *buff, size_t size) {
+	int i = 0;
+	size_t wrote = 0;
+	for(;;) {
+		i = write(fd, &buff[wrote], size - wrote);
+		if(i <= 0)
+			return i;
+		wrote += i;
+		if(wrote == size)
+			return wrote;
+	}
+}
+
+static int 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 -1;
+	}
+	return (int) 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;
+	}
+
+	int len;
+	unsigned char buff[BUFF_SIZE];
+	char ip_buf[16];
+	
+	//memset (buff, 0, sizeof(buff));
+
+	switch (pt) {
+		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 != 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++ = c;
+					memcpy(cur, user, c);
+					cur += c;
+					c = passlen & 0xFF;
+					*cur++ = c;
+					memcpy(cur, pass, c);
+					cur += c;
+
+					if((cur - out) != write_n_bytes(sock, out, 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;
+					}
+				}
+				int 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;
+}
+
+
+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:
+			srand(time(NULL));
+			do {
+				k++;
+				i = 0 + (unsigned int) (proxy_count * 1.0 * rand() / (RAND_MAX + 1.0));
+			} 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;
+	int 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:
+			alive_count = 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:
+			alive_count = 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} };
+
+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);
+		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));
+
+	data->hostent_space.h_name = data->addr_name;
+	data->hostent_space.h_length = sizeof(in_addr_t);
+	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);
+}
+
+
+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) goto err1;
+	
+	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
+			goto err2;
+	}
+	if(service) getservbyname_r(service, NULL, &se_buf, buf, sizeof(buf), &se);
+
+	port = se ? se->s_port : htons(atoi(service ? service : "0"));
+	((struct sockaddr_in *) &space->sockaddr_space)->sin_port = 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));
+	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 {
+		p->ai_flags = (AI_V4MAPPED | AI_ADDRCONFIG);
+	}
+	
+	goto out;
+	err2:
+	free(space);
+	err1:
+	return 1;
+	out:
+	return 0;
+}

src/core.h

@@ -0,0 +1,146 @@
+/***************************************************************************
+                          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
+
+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>
+pthread_mutex_t internal_ips_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,
+	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 {
+	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 sock, ip_type target_ip, unsigned short target_port,
+			 proxy_data * pd, unsigned int proxy_count, chain_type ct,
+			 unsigned int max_chain );
+
+void proxychains_write_log(char *str, ...);
+
+typedef int (*connect_t)(int, const struct sockaddr *, socklen_t);
+typedef struct hostent* (*gethostbyname_t)(const char *);
+typedef int (*freeaddrinfo_t)(struct addrinfo *);
+typedef struct hostent *(*gethostbyaddr_t) (const void *, socklen_t, int);
+
+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 *name, struct gethostbyname_data *data);
+
+int proxy_getaddrinfo(const char *node, const char *service, 
+		      const struct addrinfo *hints, struct addrinfo **res);
+void proxy_freeaddrinfo(struct addrinfo *res);
+
+#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

src/libproxychains.c

@@ -0,0 +1,426 @@
+/***************************************************************************
+                          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 <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;
+localaddr_arg localnet_addr[MAX_LOCALNET];
+chain_type proxychains_ct;
+proxy_data proxychains_pd[MAX_CHAIN];
+
+size_t num_localnet_addr = 0;
+
+#ifdef THREAD_SAFE
+pthread_once_t init_once = PTHREAD_ONCE_INIT;
+#endif
+static int init_l = 0;
+
+static inline void get_chain_data(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);
+	/* 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
+
+/* get configuration from config file */
+static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct) {
+	int count = 0, 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];
+	FILE *file = NULL;
+
+	if(proxychains_got_chain_data)
+		return;
+
+	//Some defaults
+	tcp_read_time_out = 4 * 1000;
+	tcp_connect_time_out = 10 * 1000;
+	*ct = DYNAMIC_TYPE;
+	
+	env = get_config_path(getenv(PROXYCHAINS_CONF_FILE_ENV_VAR), buff, sizeof(buff));
+	file = fopen(env, "r");
+
+	env = getenv(PROXYCHAINS_QUIET_MODE_ENV_VAR);
+	if(env && *env == '1')
+		proxychains_quiet_mode = 1;
+
+	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, "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 =
+							    (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 = (len ? len : 1);
+				} else if(strstr(buff, "quiet_mode")) {
+					proxychains_quiet_mode = 1;
+				} else if(strstr(buff, "proxy_dns")) {
+					proxychains_resolver = 1;
+				}
+			}
+		}
+	}
+	fclose(file);
+	*proxy_count = count;
+	proxychains_got_chain_data = 1;
+}
+
+/*******  HOOK FUNCTIONS  *******/
+
+int connect(int sock, const struct sockaddr *addr, unsigned int 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;
+	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);
+
+	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;
+}
+
+struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) {
+	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;
+}

src/main.c

@@ -0,0 +1,139 @@
+/*   (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("\nUsage:\t%s -q -f config_file program_name [arguments]\n"
+	       "\t-q makes proxychains quiet - this overrides the config setting\n"
+	       "\t-t allows to manually specify a configfile to use\n"
+	       "\tfor example : proxychains telnet somehost.com\n" "More help in README file\n\n", 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);
+	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] == '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]);
+
+	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, "couldnt 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), "LD_PRELOAD=%s/%s", prefix, dll_name);
+	putenv(buf);
+#else
+	snprintf(buf, sizeof(buf), "DYLD_INSERT_LIBRARIES=%s/%s", prefix, dll_name);
+	putenv(buf);
+	putenv("DYLD_FORCE_FLAT_NAMESPACE=1");
+#endif
+	execvp(argv[start_argv], &argv[start_argv]);
+	perror("proxychains can't load process....");
+
+	return EXIT_FAILURE;
+}

src/proxychains

@@ -0,0 +1,26 @@
+#!/bin/sh
+echo "ProxyChains-3.1 (http://proxychains.sf.net)"
+
+usage() {
+
+	echo "	usage:"
+	echo "		$0 [h] [f config-file] <prog> [args]"
+	exit
+}
+
+if [ $# = 0 ] ; then
+	usage
+fi
+
+if [ $1 = "-h" ]; then
+	usage
+fi
+
+if [ "$1" = "-f" ]; then
+	export PROXYCHAINS_CONF_FILE=$2;
+	shift;
+	shift;
+fi
+
+export LD_PRELOAD=libproxychains.so.3
+exec "$@"

src/proxychains.conf

@@ -0,0 +1,88 @@
+# proxychains.conf  VER 3.1
+#
+#        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
+
+# 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
+
+# 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
+#        ( auth types supported: "basic"-http  "user/pass"-socks )
+#
+[ProxyList]
+# add proxy here ...
+# meanwile
+# defaults set to "tor"
+socks4 	127.0.0.1 9050
+

src/proxyresolv

@@ -0,0 +1,16 @@
+#!/bin/sh
+# This script is called by proxychains to resolve DNS names
+
+# DNS server used to resolve names
+DNS_SERVER=4.2.2.2
+
+
+if [ $# = 0 ] ; then
+	echo "	usage:"
+	echo "		proxyresolv <hostname> "
+	exit
+fi
+
+
+export LD_PRELOAD=libproxychains.so
+dig $1 @$DNS_SERVER +tcp | awk '/A.+[0-9]+\.[0-9]+\.[0-9]/{print $5;}'

stylesheets/pygment_trac.css

@@ -1,70 +0,0 @@
-.highlight .hll { background-color: #ffffcc }
-.highlight  { background: #f0f3f3; }
-.highlight .c { color: #0099FF; font-style: italic } /* Comment */
-.highlight .err { color: #AA0000; background-color: #FFAAAA } /* Error */
-.highlight .k { color: #006699; font-weight: bold } /* Keyword */
-.highlight .o { color: #555555 } /* Operator */
-.highlight .cm { color: #0099FF; font-style: italic } /* Comment.Multiline */
-.highlight .cp { color: #009999 } /* Comment.Preproc */
-.highlight .c1 { color: #0099FF; font-style: italic } /* Comment.Single */
-.highlight .cs { color: #0099FF; font-weight: bold; font-style: italic } /* Comment.Special */
-.highlight .gd { background-color: #FFCCCC; border: 1px solid #CC0000 } /* Generic.Deleted */
-.highlight .ge { font-style: italic } /* Generic.Emph */
-.highlight .gr { color: #FF0000 } /* Generic.Error */
-.highlight .gh { color: #003300; font-weight: bold } /* Generic.Heading */
-.highlight .gi { background-color: #CCFFCC; border: 1px solid #00CC00 } /* Generic.Inserted */
-.highlight .go { color: #AAAAAA } /* Generic.Output */
-.highlight .gp { color: #000099; font-weight: bold } /* Generic.Prompt */
-.highlight .gs { font-weight: bold } /* Generic.Strong */
-.highlight .gu { color: #003300; font-weight: bold } /* Generic.Subheading */
-.highlight .gt { color: #99CC66 } /* Generic.Traceback */
-.highlight .kc { color: #006699; font-weight: bold } /* Keyword.Constant */
-.highlight .kd { color: #006699; font-weight: bold } /* Keyword.Declaration */
-.highlight .kn { color: #006699; font-weight: bold } /* Keyword.Namespace */
-.highlight .kp { color: #006699 } /* Keyword.Pseudo */
-.highlight .kr { color: #006699; font-weight: bold } /* Keyword.Reserved */
-.highlight .kt { color: #007788; font-weight: bold } /* Keyword.Type */
-.highlight .m { color: #FF6600 } /* Literal.Number */
-.highlight .s { color: #CC3300 } /* Literal.String */
-.highlight .na { color: #330099 } /* Name.Attribute */
-.highlight .nb { color: #336666 } /* Name.Builtin */
-.highlight .nc { color: #00AA88; font-weight: bold } /* Name.Class */
-.highlight .no { color: #336600 } /* Name.Constant */
-.highlight .nd { color: #9999FF } /* Name.Decorator */
-.highlight .ni { color: #999999; font-weight: bold } /* Name.Entity */
-.highlight .ne { color: #CC0000; font-weight: bold } /* Name.Exception */
-.highlight .nf { color: #CC00FF } /* Name.Function */
-.highlight .nl { color: #9999FF } /* Name.Label */
-.highlight .nn { color: #00CCFF; font-weight: bold } /* Name.Namespace */
-.highlight .nt { color: #330099; font-weight: bold } /* Name.Tag */
-.highlight .nv { color: #003333 } /* Name.Variable */
-.highlight .ow { color: #000000; font-weight: bold } /* Operator.Word */
-.highlight .w { color: #bbbbbb } /* Text.Whitespace */
-.highlight .mf { color: #FF6600 } /* Literal.Number.Float */
-.highlight .mh { color: #FF6600 } /* Literal.Number.Hex */
-.highlight .mi { color: #FF6600 } /* Literal.Number.Integer */
-.highlight .mo { color: #FF6600 } /* Literal.Number.Oct */
-.highlight .sb { color: #CC3300 } /* Literal.String.Backtick */
-.highlight .sc { color: #CC3300 } /* Literal.String.Char */
-.highlight .sd { color: #CC3300; font-style: italic } /* Literal.String.Doc */
-.highlight .s2 { color: #CC3300 } /* Literal.String.Double */
-.highlight .se { color: #CC3300; font-weight: bold } /* Literal.String.Escape */
-.highlight .sh { color: #CC3300 } /* Literal.String.Heredoc */
-.highlight .si { color: #AA0000 } /* Literal.String.Interpol */
-.highlight .sx { color: #CC3300 } /* Literal.String.Other */
-.highlight .sr { color: #33AAAA } /* Literal.String.Regex */
-.highlight .s1 { color: #CC3300 } /* Literal.String.Single */
-.highlight .ss { color: #FFCC33 } /* Literal.String.Symbol */
-.highlight .bp { color: #336666 } /* Name.Builtin.Pseudo */
-.highlight .vc { color: #003333 } /* Name.Variable.Class */
-.highlight .vg { color: #003333 } /* Name.Variable.Global */
-.highlight .vi { color: #003333 } /* Name.Variable.Instance */
-.highlight .il { color: #FF6600 } /* Literal.Number.Integer.Long */
-
-.type-csharp .highlight .k { color: #0000FF }
-.type-csharp .highlight .kt { color: #0000FF }
-.type-csharp .highlight .nf { color: #000000; font-weight: normal }
-.type-csharp .highlight .nc { color: #2B91AF }
-.type-csharp .highlight .nn { color: #000000 }
-.type-csharp .highlight .s { color: #A31515 }
-.type-csharp .highlight .sc { color: #A31515 }

stylesheets/stylesheet.css

@@ -1,431 +0,0 @@
-/*******************************************************************************
-Slate Theme for Github Pages
-by Jason Costello, @jsncostello
-*******************************************************************************/
-
-@import url(pygment_trac.css);
-
-/*******************************************************************************
-MeyerWeb Reset
-*******************************************************************************/
-
-html, body, div, span, applet, object, iframe,
-h1, h2, h3, h4, h5, h6, p, blockquote, pre,
-a, abbr, acronym, address, big, cite, code,
-del, dfn, em, img, ins, kbd, q, s, samp,
-small, strike, strong, sub, sup, tt, var,
-b, u, i, center,
-dl, dt, dd, ol, ul, li,
-fieldset, form, label, legend,
-table, caption, tbody, tfoot, thead, tr, th, td,
-article, aside, canvas, details, embed,
-figure, figcaption, footer, header, hgroup,
-menu, nav, output, ruby, section, summary,
-time, mark, audio, video {
-  margin: 0;
-  padding: 0;
-  border: 0;
-  font: inherit;
-  vertical-align: baseline;
-}
-
-/* HTML5 display-role reset for older browsers */
-article, aside, details, figcaption, figure,
-footer, header, hgroup, menu, nav, section {
-  display: block;
-}
-
-ol, ul {
-  list-style: none;
-}
-
-blockquote, q {
-}
-
-table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-
-a:focus {
-  outline: none;
-}
-
-/*******************************************************************************
-Theme Styles
-*******************************************************************************/
-
-body {
-  box-sizing: border-box;
-  color:#373737;
-  background: #212121;
-  font-size: 16px;
-  font-family: 'Myriad Pro', Calibri, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  -webkit-font-smoothing: antialiased;
-}
-
-h1, h2, h3, h4, h5, h6 {
-  margin: 10px 0;
-  font-weight: 700;
-  color:#222222;
-  font-family: 'Lucida Grande', 'Calibri', Helvetica, Arial, sans-serif;
-  letter-spacing: -1px;
-}
-
-h1 {
-  font-size: 36px;
-  font-weight: 700;
-}
-
-h2 {
-  padding-bottom: 10px;
-  font-size: 32px;
-  background: url('../images/bg_hr.png') repeat-x bottom;
-}
-
-h3 {
-  font-size: 24px;
-}
-
-h4 {
-  font-size: 21px;
-}
-
-h5 {
-  font-size: 18px;
-}
-
-h6 {
-  font-size: 16px;
-}
-
-p {
-  margin: 10px 0 15px 0;
-}
-
-footer p {
-  color: #f2f2f2;
-}
-
-a {
-  text-decoration: none;
-  color: #007edf;
-  text-shadow: none;
-
-  transition: color 0.5s ease;
-  transition: text-shadow 0.5s ease;
-  -webkit-transition: color 0.5s ease;
-  -webkit-transition: text-shadow 0.5s ease;
-  -moz-transition: color 0.5s ease;
-  -moz-transition: text-shadow 0.5s ease;
-  -o-transition: color 0.5s ease;
-  -o-transition: text-shadow 0.5s ease;
-  -ms-transition: color 0.5s ease;
-  -ms-transition: text-shadow 0.5s ease;
-}
-
-#main_content a:hover {
-  color: #0069ba;
-  text-shadow: #0090ff 0px 0px 2px;
-}
-
-footer a:hover {
-  color: #43adff;
-  text-shadow: #0090ff 0px 0px 2px;
-}
-
-em {
-  font-style: italic;
-}
-
-strong {
-  font-weight: bold;
-}
-
-img {
-  position: relative;
-  margin: 0 auto;
-  max-width: 739px;
-  padding: 5px;
-  margin: 10px 0 10px 0;
-  border: 1px solid #ebebeb;
-
-  box-shadow: 0 0 5px #ebebeb;
-  -webkit-box-shadow: 0 0 5px #ebebeb;
-  -moz-box-shadow: 0 0 5px #ebebeb;
-  -o-box-shadow: 0 0 5px #ebebeb;
-  -ms-box-shadow: 0 0 5px #ebebeb;
-}
-
-pre, code {
-  width: 100%;
-  color: #222;
-  background-color: #fff;
-
-  font-family: Monaco, "Bitstream Vera Sans Mono", "Lucida Console", Terminal, monospace;
-  font-size: 14px;
-
-  border-radius: 2px;
-  -moz-border-radius: 2px;
-  -webkit-border-radius: 2px;
-
-
-
-}
-
-pre {
-  width: 100%;
-  padding: 10px;
-  box-shadow: 0 0 10px rgba(0,0,0,.1);
-  overflow: auto;
-}
-
-code {
-  padding: 3px;
-  margin: 0 3px;
-  box-shadow: 0 0 10px rgba(0,0,0,.1);
-}
-
-pre code {
-  display: block;
-  box-shadow: none;
-}
-
-blockquote {
-  color: #666;
-  margin-bottom: 20px;
-  padding: 0 0 0 20px;
-  border-left: 3px solid #bbb;
-}
-
-ul, ol, dl {
-  margin-bottom: 15px
-}
-
-ul li {
-  list-style: inside;
-  padding-left: 20px;
-}
-
-ol li {
-  list-style: decimal inside;
-  padding-left: 20px;
-}
-
-dl dt {
-  font-weight: bold;
-}
-
-dl dd {
-  padding-left: 20px;
-  font-style: italic;
-}
-
-dl p {
-  padding-left: 20px;
-  font-style: italic;
-}
-
-hr {
-  height: 1px;
-  margin-bottom: 5px;
-  border: none;
-  background: url('../images/bg_hr.png') repeat-x center;
-}
-
-table {
-  border: 1px solid #373737;
-  margin-bottom: 20px;
-  text-align: left;
- }
-
-th {
-  font-family: 'Lucida Grande', 'Helvetica Neue', Helvetica, Arial, sans-serif;
-  padding: 10px;
-  background: #373737;
-  color: #fff;
- }
-
-td {
-  padding: 10px;
-  border: 1px solid #373737;
- }
-
-form {
-  background: #f2f2f2;
-  padding: 20px;
-}
-
-img {
-  width: 100%;
-  max-width: 100%;
-}
-
-/*******************************************************************************
-Full-Width Styles
-*******************************************************************************/
-
-.outer {
-  width: 100%;
-}
-
-.inner {
-  position: relative;
-  max-width: 640px;
-  padding: 20px 10px;
-  margin: 0 auto;
-}
-
-#forkme_banner {
-  display: block;
-  position: absolute;
-  top:0;
-  right: 10px;
-  z-index: 10;
-  padding: 10px 50px 10px 10px;
-  color: #fff;
-  background: url('../images/blacktocat.png') #0090ff no-repeat 95% 50%;
-  font-weight: 700;
-  box-shadow: 0 0 10px rgba(0,0,0,.5);
-  border-bottom-left-radius: 2px;
-  border-bottom-right-radius: 2px;
-}
-
-#header_wrap {
-  background: #212121;
-  background: -moz-linear-gradient(top, #373737, #212121);
-  background: -webkit-linear-gradient(top, #373737, #212121);
-  background: -ms-linear-gradient(top, #373737, #212121);
-  background: -o-linear-gradient(top, #373737, #212121);
-  background: linear-gradient(top, #373737, #212121);
-}
-
-#header_wrap .inner {
-  padding: 50px 10px 30px 10px;
-}
-
-#project_title {
-  margin: 0;
-  color: #fff;
-  font-size: 42px;
-  font-weight: 700;
-  text-shadow: #111 0px 0px 10px;
-}
-
-#project_tagline {
-  color: #fff;
-  font-size: 24px;
-  font-weight: 300;
-  background: none;
-  text-shadow: #111 0px 0px 10px;
-}
-
-#downloads {
-  position: absolute;
-  width: 210px;
-  z-index: 10;
-  bottom: -40px;
-  right: 0;
-  height: 70px;
-  background: url('../images/icon_download.png') no-repeat 0% 90%;
-}
-
-.zip_download_link {
-  display: block;
-  float: right;
-  width: 90px;
-  height:70px;
-  text-indent: -5000px;
-  overflow: hidden;
-  background: url(../images/sprite_download.png) no-repeat bottom left;
-}
-
-.tar_download_link {
-  display: block;
-  float: right;
-  width: 90px;
-  height:70px;
-  text-indent: -5000px;
-  overflow: hidden;
-  background: url(../images/sprite_download.png) no-repeat bottom right;
-  margin-left: 10px;
-}
-
-.zip_download_link:hover {
-  background: url(../images/sprite_download.png) no-repeat top left;
-}
-
-.tar_download_link:hover {
-  background: url(../images/sprite_download.png) no-repeat top right;
-}
-
-#main_content_wrap {
-  background: #f2f2f2;
-  border-top: 1px solid #111;
-  border-bottom: 1px solid #111;
-}
-
-#main_content {
-  padding-top: 40px;
-}
-
-#footer_wrap {
-  background: #212121;
-}
-
-
-
-/*******************************************************************************
-Small Device Styles
-*******************************************************************************/
-
-@media screen and (max-width: 480px) {
-  body {
-    font-size:14px;
-  }
-
-  #downloads {
-    display: none;
-  }
-
-  .inner {
-    min-width: 320px;
-    max-width: 480px;
-  }
-
-  #project_title {
-  font-size: 32px;
-  }
-
-  h1 {
-    font-size: 28px;
-  }
-
-  h2 {
-    font-size: 24px;
-  }
-
-  h3 {
-    font-size: 21px;
-  }
-
-  h4 {
-    font-size: 18px;
-  }
-
-  h5 {
-    font-size: 14px;
-  }
-
-  h6 {
-    font-size: 12px;
-  }
-
-  code, pre {
-    min-width: 320px;
-    max-width: 480px;
-    font-size: 11px;
-  }
-
-}

tests/test_getaddrinfo.c

@@ -0,0 +1,41 @@
+#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;
+}