From 2f3d33dd47324515041bcb10104e1bbb90b10858 Mon Sep 17 00:00:00 2001
From: rofl0r <retnyg@gmx.net>
Date: Tue, 9 Jan 2018 13:30:02 +0000
Subject: [PATCH] remove usage of s6_addr16 and s6_addr32

it turns out that those macros are not portable at all. rather than
adding workarounds to make it work for every single platform, just
use plain s6_addr instead.
---
 configure            | 8 --------
 src/libproxychains.c | 7 +++----
 2 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/configure b/configure
index d506ab7..277423e 100755
--- a/configure
+++ b/configure
@@ -133,14 +133,6 @@ if [ -z "$CC" ] ; then
 	CC=cc
 fi
 
-check_compile 'whether netinet/in.h defines s6_addr16' "" \
-'#include <netinet/in.h>\nint main(int a, char**c){struct in6_addr x={.s6_addr32[0]=a};return x.s6_addr16[0]; }' \
-|| {
-check_compile 'whether netinet/in.h defines __u6_addr.__u6_addr16' \
-'-Ds6_addr16=__u6_addr.__u6_addr16 -Ds6_addr32=__u6_addr.__u6_addr32' \
-'#include <netinet/in.h>\nint main(int a, char**c){struct in6_addr x={.s6_addr32[0]=a};return x.s6_addr16[0]; }'
-}
-
 check_define __OpenBSD__ && \
 check_compile_run 'whether OpenBSDs fclose() (illegally) calls close()' \
 '#include <stdio.h>\n#include<stdlib.h>\nint close(int x){exit(0);}int main(){fclose(stdin);return 1;}' && \
diff --git a/src/libproxychains.c b/src/libproxychains.c
index 7373d55..c3d31e0 100644
--- a/src/libproxychains.c
+++ b/src/libproxychains.c
@@ -329,8 +329,7 @@ int close(int fd) {
 	return -1;
 }
 static int is_v4inv6(const struct in6_addr *a) {
-	return a->s6_addr32[0] == 0 && a->s6_addr32[1] == 0 &&
-	       a->s6_addr16[4] == 0 && a->s6_addr16[5] == 0xffff;
+	return !memcmp(a->s6_addr, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
 }
 int connect(int sock, const struct sockaddr *addr, unsigned int len) {
 	INIT();
@@ -360,7 +359,7 @@ int connect(int sock, const struct sockaddr *addr, unsigned int len) {
 	           : ntohs(((struct sockaddr_in6 *) addr)->sin6_port);
 	struct in_addr v4inv6;
 	if(v6 && is_v4inv6(p_addr_in6)) {
-		memcpy(&v4inv6.s_addr, &p_addr_in6->s6_addr32[3], 4);
+		memcpy(&v4inv6.s_addr, &p_addr_in6->s6_addr[12], 4);
 		v6 = dest_ip.is_v6 = 0;
 		p_addr_in = &v4inv6;
 	}
@@ -455,7 +454,7 @@ int pc_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 			unsigned scopeid = 0;
 			if(v6) {
 				if(is_v4inv6(&((struct sockaddr_in6*)sa)->sin6_addr)) {
-					memcpy(v4inv6buf, &((struct sockaddr_in6*)sa)->sin6_addr.s6_addr32[3], 4);
+					memcpy(v4inv6buf, &((struct sockaddr_in6*)sa)->sin6_addr.s6_addr[12], 4);
 					ip = v4inv6buf;
 					v6 = 0;
 				} else