From 65c1c5ab5c9e2b67a377a878baa76a3eacd7397b Mon Sep 17 00:00:00 2001
From: z3APA3A <3APA3A@3proxy.ru>
Date: Wed, 18 Nov 2020 03:09:32 +0300
Subject: [PATCH] do not attempt to send to 0 port

---
 src/socks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/socks.c b/src/socks.c
index 682eda2..b8df63d 100644
--- a/src/socks.c
+++ b/src/socks.c
@@ -441,7 +441,7 @@ fflush(stderr);
 							fds[0].events = fds[0].revents = 0;
 							param->statssrv64+=len;
 							param->nreads++;
-							if(heur == 2 && (*SAFAMILY(&param->sinsr) != *SAFAMILY(&param->req) || memcmp(SAADDR(&param->sinsr),SAADDR(&param->req), SAADDRLEN(&param->req)))){
+							if(!*SAPORT(&sin) || (heur == 2 && (*SAFAMILY(&param->sinsr) != *SAFAMILY(&param->req) || memcmp(SAADDR(&param->sinsr),SAADDR(&param->req), SAADDRLEN(&param->req))))){
 #if SOCKSTRACE > 0
 fprintf(stderr, "external UDP packet ignored\n");
 fflush(stderr);