From 7331accab350aaa56b4cafa8c2bc6037555be928 Mon Sep 17 00:00:00 2001
From: pagxir <pagxir@gmail.com>
Date: Sat, 31 Oct 2015 22:16:02 +0800
Subject: [PATCH] try to recover socks5 connection on buggy proxy client

---
 src/local.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/local.c b/src/local.c
index bf617e60..3c815727 100644
--- a/src/local.c
+++ b/src/local.c
@@ -358,6 +358,14 @@ static void server_recv_cb(EV_P_ ev_io *w, int revents)
             char *send_buf = (char *)&response;
             send(server->fd, send_buf, sizeof(response), 0);
             server->stage = 1;
+
+            int off = (buf[1] & 0xff) + 2;
+            if (buf[0] == 0x05 && off < r) {
+                memmove(buf, buf + off, r - off);
+                r -= off;
+                continue;
+            }
+
             return;
         } else if (server->stage == 1) {
             struct socks5_request *request = (struct socks5_request *)buf;