From e036d21d680655784b46947347ee26ca525d19dc Mon Sep 17 00:00:00 2001
From: whl739 <whl739@163.com>
Date: Thu, 21 Jun 2018 17:22:59 +0800
Subject: [PATCH] Nginx: hijack `shutdown`.

In some cases, nginx will call `ngx_shutdown_socket`, so we need to hijack `shutdown`.
---
 app/nginx-1.11.10/src/event/modules/ngx_ff_module.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c b/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c
index 46aee1ea..d3123fe0 100644
--- a/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c
+++ b/app/nginx-1.11.10/src/event/modules/ngx_ff_module.c
@@ -117,6 +117,8 @@ static ssize_t (*real_readv)(int, const struct iovec *, int);
 static ssize_t (*real_read)(int, void *, size_t);
 static ssize_t (*real_write)(int, const void *, size_t);
 
+static int (*real_shutdown)(int, int);
+
 static int (*real_ioctl)(int, int, void *);
 
 static int (*real_gettimeofday)(struct timeval *tv, struct timezone *tz);
@@ -444,6 +446,17 @@ close(int sockfd)
     return SYSCALL(close)(sockfd);
 }
 
+int
+shutdown(int sockfd, int how)
+{
+    if(is_fstack_fd(sockfd)){
+        sockfd = restore_fstack_fd(sockfd);
+        return ff_close(sockfd);
+    }
+
+    return SYSCALL(shutdown)(sockfd, how);
+}
+
 ssize_t
 writev(int sockfd, const struct iovec *iov, int iovcnt)
 {