Fix merge error.

Hi ! Nice job with localnet, just what I was needing, here is just a small fix. Hope this helps.

Makefile

@@ -5,19 +5,19 @@
 # Do not make changes here.
 #
 
-exec_prefix = /usr/local
-bindir = $(exec_prefix)/bin
-
-prefix = /usr/local/
+prefix = /usr/local
 includedir = $(prefix)/include
 libdir = $(prefix)/lib
-sysconfdir=$(prefix)/etc
+confdir = $(prefix)/etc
+
+exec_prefix = $(prefix)
+bindir = $(exec_prefix)/bin
 
 SRCS = $(sort $(wildcard src/*.c))
 OBJS = $(SRCS:.c=.o)
 LOBJS = src/core.o src/libproxychains.o
 
-CFLAGS  += -Wall -O0 -g -std=c99 -D_GNU_SOURCE -pipe -DTHREAD_SAFE
+CCFLAGS  = -Wall -O0 -g -std=c99 -D_GNU_SOURCE -pipe -DTHREAD_SAFE -Werror
 LDFLAGS = -shared -fPIC -ldl -lpthread
 INC     = 
 PIC     = -fPIC
@@ -38,18 +38,20 @@ PXCHAINS = proxychains4
 ALL_TOOLS = $(PXCHAINS)
 
 
-CFLAGS+=$(USER_CFLAGS) $(MAC_CFLAGS)
-CFLAGS_MAIN=-DLIB_DIR=\"$(libdir)\" -DSYSCONFDIR=\"$(sysconfdir)\" -DDLL_NAME=\"$(LDSO_PATHNAME)\"
+CCFLAGS+=$(USER_CFLAGS) $(MAC_CFLAGS)
+LDFLAGS+=$(USER_LDFLAGS) $(MAC_LDFLAGS)
+CXXFLAGS+=$(CCFLAGS) $(USER_CFLAGS) $(MAC_CFLAGS)
+CFLAGS_MAIN=-DLIB_DIR=\"$(libdir)\" -DINSTALL_PREFIX=\"$(prefix)\" -DDLL_NAME=\"$(LDSO_PATHNAME)\"
 
 
 all: $(ALL_LIBS) $(ALL_TOOLS)
 
 #install: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(DESTDIR)$(LDSO_PATHNAME)
-install: 
-	install -d $(DESTDIR)/$(bindir)/ $(DESTDIR)/$(libdir)/ $(DESTDIR)/$(sysconfdir)
+install:
+	install -d $(DESTDIR)/$(bindir) $(DESTDIR)/$(libdir) $(DESTDIR)/$(confdir) $(DESTDIR)/$(includedir)
 	install $(INSTALL_FLAGS) 755 $(ALL_TOOLS) $(DESTDIR)/$(bindir)/
 	install $(INSTALL_FLAGS) 644 $(ALL_LIBS) $(DESTDIR)/$(libdir)/
-	install $(INSTALL_FLAGS) 644 src/proxychains.conf $(DESTDIR)/$(sysconfdir)/
+	install $(INSTALL_FLAGS) 644 src/proxychains.conf $(DESTDIR)/$(confdir)
 
 clean:
 	rm -f $(ALL_LIBS)
@@ -57,7 +59,7 @@ clean:
 	rm -f $(OBJS)
 
 %.o: %.c
-	$(CC) $(CFLAGS) $(CFLAGS_MAIN) $(INC) $(PIC) -c -o $@ $<
+	$(CC) $(CCFLAGS) $(CFLAGS_MAIN) $(INC) $(PIC) -c -o $@ $<
 
 $(LDSO_PATHNAME): $(LOBJS)
 	$(CC) $(LDFLAGS) $(LD_SET_SONAME)$(LDSO_PATHNAME) -o $@ $(LOBJS)
@@ -65,5 +67,4 @@ $(LDSO_PATHNAME): $(LOBJS)
 $(ALL_TOOLS): $(OBJS)
 	$(CC) src/main.o -o $(PXCHAINS)
 
-
 .PHONY: all clean install

configure

@@ -66,7 +66,8 @@ 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 MAC_CFLAGS+=-DIS_MAC=1 -arch x86_64 -arch i386 >>config.mak
+	echo MAC_LDFLAGS+=-arch x86_64 -arch i386 >>config.mak
 	echo LD_SET_SONAME=-Wl,-install_name,>>config.mak
 	echo INSTALL_FLAGS=-m>>config.mak
 fi

src/core.c

@@ -14,6 +14,7 @@
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
+#include <sys/types.h>
 
 #include <stdio.h>
 #include <unistd.h>
@@ -25,7 +26,6 @@
 #include <sys/utsname.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
-#include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/poll.h>
 #include <sys/wait.h>
@@ -33,10 +33,6 @@
 #include <time.h>
 #include <sys/time.h>
 #include <stdarg.h>
-#ifdef THREAD_SAFE
-#include <pthread.h>
-pthread_mutex_t internal_ips_lock;
-#endif
 
 #include "core.h"
 #include "common.h"
@@ -48,7 +44,6 @@ 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;
@@ -89,33 +84,10 @@ in_addr_t make_internal_ip(uint32_t index) {
 	return (in_addr_t) ret.as_int;
 }
 
-// stolen from libulz (C) rofl0r
-void pc_stringfromipv4(unsigned char *ip_buf_4_bytes, char *outbuf_16_bytes) {
-	unsigned char *p;
-	char *o = outbuf_16_bytes;
-	unsigned char n;
-	for(p = ip_buf_4_bytes; p < ip_buf_4_bytes + 4; p++) {
-		n = *p;
-		if(*p >= 100) {
-			if(*p >= 200)
-				*(o++) = '2';
-			else
-				*(o++) = '1';
-			n %= 100;
-		}
-		if(*p >= 10) {
-			*(o++) = (n / 10) + '0';
-			n %= 10;
-		}
-		*(o++) = n + '0';
-		*(o++) = '.';
-	}
-	o[-1] = 0;
-}
-
 static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
-static int poll_retry(struct pollfd *fds, nfds_t nfsd, int timeout) {
+static int poll_retry(struct pollfd *fds, nfds_t nfsd, int timeout)
+{
 	int ret;
 	int time_remain = timeout;
 	int time_elapsed = 0;
@@ -268,6 +240,8 @@ static int timed_connect(int sock, const struct sockaddr *addr, socklen_t len) {
 
 
 #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;
@@ -304,7 +278,7 @@ static int tunnel_to(int sock, ip_type ip, unsigned short port, proxy_type pt, c
 	switch (pt) {
 		case HTTP_TYPE:{
 				if(!dns_len) {
-					pc_stringfromipv4(&ip.octet[0], ip_buf);
+					inet_ntop(AF_INET, &ip.octet[0], ip_buf, sizeof(ip_buf));
 					dns_name = ip_buf;
 				}
 
@@ -312,7 +286,6 @@ static int tunnel_to(int sock, ip_type ip, unsigned short port, proxy_type pt, c
 					 ntohs(port));
 
 				if(user[0]) {
-#define HTTP_AUTH_MAX ((0xFF * 2) + 1 + 1)
 					// 2 * 0xff: username and pass, plus 1 for ':' and 1 for zero terminator.
 					char src[HTTP_AUTH_MAX];
 					char dst[(4 * HTTP_AUTH_MAX)];
@@ -516,8 +489,8 @@ static int start_chain(int *fd, proxy_data * pd, char *begin_mark) {
 	*fd = socket(PF_INET, SOCK_STREAM, 0);
 	if(*fd == -1)
 		goto error;
-	
-	pc_stringfromipv4(&pd->ip.octet[0], ip_buf);
+
+	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;
@@ -539,8 +512,10 @@ static int start_chain(int *fd, proxy_data * pd, char *begin_mark) {
 	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) {
@@ -592,7 +567,6 @@ static unsigned int calc_alive(proxy_data * pd, unsigned int proxy_count) {
 	return alive_count;
 }
 
-
 static int chain_step(int ns, proxy_data * pfrom, proxy_data * pto) {
 	int retcode = -1;
 	char *hostname;
@@ -606,7 +580,7 @@ static int chain_step(int ns, proxy_data * pfrom, proxy_data * pto) {
 			goto usenumericip;
 	} else {
 	usenumericip:
-		pc_stringfromipv4(&pto->ip.octet[0], ip_buf);
+		inet_ntop(AF_INET, &pto->ip.octet[0], ip_buf, sizeof(ip_buf));
 		hostname = ip_buf;
 	}
 
@@ -721,7 +695,6 @@ int connect_proxy_chain(int sock, ip_type target_ip,
 			p3->port = target_port;
 			if(SUCCESS != chain_step(ns, p1, p3))
 				goto error;
-
 	}
 
 	proxychains_write_log(TP " OK\n");
@@ -752,20 +725,18 @@ static in_addr_t resolved_addr;
 static char *resolved_addr_p[2];
 static char addr_name[1024 * 8];
 static const ip_type local_host = { {127, 0, 0, 1} };
+
 struct hostent *proxy_gethostbyname(const char *name) {
 	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;
 
 	resolved_addr_p[0] = (char *) &resolved_addr;
 	resolved_addr_p[1] = NULL;
-
 	hostent_space.h_addr_list = resolved_addr_p;
-
 	resolved_addr = 0;
 
 	gethostname(buff, sizeof(buff));
@@ -783,7 +754,6 @@ struct hostent *proxy_gethostbyname(const char *name) {
 		if(!strcmp(hp->h_name, name))
 			return hp;
 
-
 	hash = dalias_hash((char *) name);
 
 	MUTEX_LOCK(&internal_ips_lock);
@@ -798,6 +768,7 @@ struct hostent *proxy_gethostbyname(const char *name) {
 			}
 		}
 	}
+
 	// grow list if needed.
 	if(internal_ips.capa < internal_ips.counter + 1) {
 		PDEBUG("realloc\n");
@@ -825,6 +796,7 @@ struct hostent *proxy_gethostbyname(const char *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);
@@ -848,6 +820,7 @@ struct hostent *proxy_gethostbyname(const char *name) {
 int proxy_getaddrinfo(const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res) {
 	struct servent *se = NULL;
 	struct hostent *hp = NULL;
+
 	struct sockaddr *sockaddr_space = NULL;
 	struct addrinfo *addrinfo_space = NULL;
 
@@ -862,6 +835,7 @@ int proxy_getaddrinfo(const char *node, const char *service, const struct addrin
 	memset(addrinfo_space, 0, sizeof(*addrinfo_space));
 	if(node && !inet_aton(node, &((struct sockaddr_in *) sockaddr_space)->sin_addr)) {
 		hp = proxy_gethostbyname(node);
+
 		if(hp)
 			memcpy(&((struct sockaddr_in *) sockaddr_space)->sin_addr,
 			       *(hp->h_addr_list), sizeof(in_addr_t));
@@ -883,10 +857,18 @@ int proxy_getaddrinfo(const char *node, const char *service, const struct addrin
 	(*res)->ai_canonname = addr_name;
 	(*res)->ai_next = NULL;
 	(*res)->ai_family = sockaddr_space->sa_family = AF_INET;
-	(*res)->ai_socktype = hints->ai_socktype;
-	(*res)->ai_flags = hints->ai_flags;
-	(*res)->ai_protocol = hints->ai_protocol;
 	(*res)->ai_addrlen = sizeof(*sockaddr_space);
+
+	if (hints != NULL) {
+		(*res)->ai_socktype = hints->ai_socktype;
+		(*res)->ai_flags = hints->ai_flags;
+		(*res)->ai_protocol = hints->ai_protocol;
+	} else {
+		(*res)->ai_socktype = 0;
+		(*res)->ai_flags = 0;
+		(*res)->ai_protocol = 0;
+	}
+
 	goto out;
 	err3:
 	free(sockaddr_space);

src/core.h

@@ -37,9 +37,10 @@ typedef struct {
 } internal_ip_lookup_table;
 
 extern internal_ip_lookup_table internal_ips;
+
 #ifdef THREAD_SAFE
 #include <pthread.h>
-extern pthread_mutex_t internal_ips_lock;
+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)
@@ -133,8 +134,6 @@ int proxy_getaddrinfo(const char *node, const char *service,
 				                struct addrinfo **res);
 
 
-void pc_stringfromipv4(unsigned char *ip_buf_4_bytes, char *outbuf_16_bytes);
-
 #ifdef DEBUG
 # define PDEBUG(fmt, args...) fprintf(stderr,"DEBUG:"fmt, ## args)
 #else

src/libproxychains.c

@@ -18,20 +18,20 @@
 #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 <unistd.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <netdb.h>
+#include <unistd.h>
 
 #include <netinet/in.h>
 #include <arpa/inet.h>
-#include <sys/types.h>
 #include <sys/socket.h>
-#include <fcntl.h>
-#include <dlfcn.h>
-
 
 #include "core.h"
 #include "common.h"
@@ -45,17 +45,20 @@
 
 int tcp_read_time_out;
 int tcp_connect_time_out;
-chain_type proxychains_ct;
-proxy_data proxychains_pd[MAX_CHAIN];
-unsigned int proxychains_proxy_count = 0;
 int proxychains_got_chain_data = 0;
-unsigned int proxychains_max_chain = 1;
 int proxychains_quiet_mode = 0;
 int proxychains_resolver = 0;
-localaddr_arg localnet_addr[MAX_LOCALNET];
-size_t num_localnet_addr = 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;
+
 #ifdef THREAD_SAFE
 pthread_once_t init_once = PTHREAD_ONCE_INIT;
 #endif
@@ -66,7 +69,7 @@ static inline void get_chain_data(proxy_data * pd, unsigned int *proxy_count, ch
 static void load_sym(void** funcptr, char* symname, void* proxyfunc) {
 
 	*funcptr = dlsym(RTLD_NEXT, symname);
-	
+
 	if(!(*funcptr)) {
 		fprintf(stderr, "Cannot load symbol '%s' %s\n", symname, dlerror());
 		exit(1);
@@ -87,7 +90,7 @@ static void do_init(void) {
 		char* symname;
 		void* proxyfunc;
 	} override_symbols[] = {
-		#define SYM_ENTRY(X) { .funcptr = &true_ ## X,  .symname = # X, .proxyfunc = X,} 
+		#define SYM_ENTRY(X) { .funcptr = &true_ ## X,  .symname = # X, .proxyfunc = X,}
 		SYM_ENTRY(connect),
 		SYM_ENTRY(gethostbyname),
 		SYM_ENTRY(getaddrinfo),
@@ -123,10 +126,10 @@ static void init_lib_wrapper(const char* caller) {
 #endif
 }
 
-/* if we use gcc >= 3, we can instruct the dynamic loader 
+/* 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 
+ * race condition if 2 threads call it before init_l is set
  * and PTHREAD support was disabled */
 #if __GNUC__ > 2
 __attribute__((constructor))
@@ -178,7 +181,7 @@ static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_typ
 			if(list) {
 				if(count >= MAX_CHAIN)
 					break;
-				
+
 				memset(&pd[count], 0, sizeof(proxy_data));
 
 				pd[count].ps = PLAY_STATE;
@@ -293,6 +296,7 @@ int connect(int sock, const struct sockaddr *addr, unsigned int len) {
 	unsigned short port;
 	size_t i;
 	int remote_dns_connect = 0;
+
 	INIT();
 	optlen = sizeof(socktype);
 	getsockopt(sock, SOL_SOCKET, SO_TYPE, &socktype, &optlen);
@@ -375,8 +379,10 @@ void freeaddrinfo(struct addrinfo *res) {
 	if(!proxychains_resolver)
 		true_freeaddrinfo(res);
 	else {
-		free(res->ai_addr);
-		free(res);
+		if (res != NULL) {
+			free(res->ai_addr);
+			free(res);
+		}
 	}
 	return;
 }
@@ -395,14 +401,14 @@ int getnameinfo(const struct sockaddr *sa,
 	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) {
-			pc_stringfromipv4((unsigned char*) &(SOCKADDR_2(*sa)), ip_buf);
+			inet_ntop(AF_INET, (unsigned char*) &(SOCKADDR_2(*sa)), ip_buf, sizeof(ip_buf));
 			strncpy(host, ip_buf, hostlen);
 		}
 		if(servlen)
@@ -436,7 +442,7 @@ struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) {
 		he.h_addrtype = AF_INET;
 		he.h_aliases = NULL;
 		he.h_length = 4;
-		pc_stringfromipv4((unsigned char *) addr, buf);
+		inet_ntop(AF_INET, addr, buf, sizeof(buf));
 		return &he;
 	}
 	return NULL;

src/main.c

@@ -18,12 +18,16 @@
 #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 <unistd.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <sys/types.h>
+#include <unistd.h>
+
 #include <sys/wait.h>
 
 #include "common.h"
@@ -72,11 +76,12 @@ static void set_own_dir(const char *argv0) {
 
 int main(int argc, char *argv[]) {
 	char *path = NULL;
-	char buf[256];
-	char pbuf[256];
+	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++) {
@@ -104,6 +109,7 @@ int main(int argc, char *argv[]) {
 	if(!path) {
 		// priority 1: env var PROXYCHAINS_CONF_FILE
 		path = getenv(PROXYCHAINS_CONF_FILE_ENV_VAR);
+
 		if(check_path(path))
 			goto have;
 
@@ -111,6 +117,7 @@ int main(int argc, char *argv[]) {
 		path = getcwd(buf, sizeof(buf));
 		snprintf(pbuf, sizeof(pbuf), "%s/%s", path, PROXYCHAINS_CONF_FILE);
 		path = pbuf;
+
 		if(check_path(path))
 			goto have;
 
@@ -121,16 +128,19 @@ int main(int argc, char *argv[]) {
 		if(check_path(path))
 			goto have;
 
-		// priority 4: $SYSCONFDIR/proxychains.conf
-		path = SYSCONFDIR "/" PROXYCHAINS_CONF_FILE;
+		/* Check for default config file in two locations {install_prefix}/etc /etc */
+		// priority 4: $INSTALL_PREFIX/etc/proxychains.conf
+		snprintf(pbuf, sizeof(pbuf), "%s/etc/%s", INSTALL_PREFIX, PROXYCHAINS_CONF_FILE);
+		path = pbuf;
 		if(check_path(path))
 			goto have;
 
 		// priority 5: /etc/proxychains.conf
-		path = "/etc/" PROXYCHAINS_CONF_FILE;
+		snprintf(pbuf, sizeof(pbuf), "/etc/%s", PROXYCHAINS_CONF_FILE);
+		path = pbuf;
 		if(check_path(path))
 			goto have;
-		perror("couldnt find configuration file");
+		perror("Couldn't find configuration file");
 		return 1;
 	}
 
@@ -145,9 +155,7 @@ int main(int argc, char *argv[]) {
 	if(quiet)
 		setenv(PROXYCHAINS_QUIET_MODE_ENV_VAR, "1", 1);
 
-
 	// search DLL
-
 	set_own_dir(argv[0]);
 
 	while(dll_dirs[i]) {
@@ -163,16 +171,17 @@ int main(int argc, char *argv[]) {
 		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);
+	snprintf(buf, sizeof(buf), "%s/%s", prefix, dll_name);
+	setenv("LD_PRELOAD", buf, 1);
 #else
-	snprintf(buf, sizeof(buf), "DYLD_INSERT_LIBRARIES=%s/%s", prefix, dll_name);
-	putenv(buf);
-	putenv("DYLD_FORCE_FLAT_NAMESPACE=1");
+	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....");

src/proxychains

@@ -1,26 +1,106 @@
 #!/bin/sh
-echo "ProxyChains-3.1 (http://proxychains.sf.net)"
+echo "ProxyChains-4.0 (https://github.com/haad/proxychains)"
 
 usage() {
 
 	echo "	usage:"
-	echo "		$0 [h] [f config-file] <prog> [args]"
+	echo "	$0 [hq] [-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
 
-if [ $1 = "-h" ]; 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
 
-if [ "$1" = "-f" ]; then
-	export PROXYCHAINS_CONF_FILE=$2;
-	shift;
-	shift;
-fi
-
-export LD_PRELOAD=libproxychains.so.3
-exec "$@"
+case "$1" in
+	on)
+		setup_proxy_env
+		show_proxy_env
+		;;
+	off)
+		disable_proxy_env
+		show_proxy_env
+		;;
+	*)
+		setup_proxy_env
+		exec "$@"
+		;;
+esac

src/proxychains.conf

@@ -1,4 +1,4 @@
-# proxychains.conf  VER 3.1
+# proxychains.conf  VER 4
 #
 #        HTTP, SOCKS4, SOCKS5 tunneling proxifier with DNS.
 #	
@@ -54,6 +54,15 @@ remote_dns_subnet 224
 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