feature: implemented the new ngx.ssl.server_port() API to get server port.

Author: halfcrazy

.travis.yml

@@ -56,12 +56,12 @@ install:
   - git clone https://github.com/openresty/mockeagain.git
   - git clone https://github.com/openresty/test-nginx.git
   - git clone -b v2.1-agentzh https://github.com/openresty/luajit2.git
-  - git clone https://github.com/openresty/lua-nginx-module.git ../lua-nginx-module
+  - git clone -b feat/ssl-server-port https://github.com/halfcrazy/lua-nginx-module.git ../lua-nginx-module
   - git clone https://github.com/openresty/echo-nginx-module.git ../echo-nginx-module
   - git clone https://github.com/openresty/memc-nginx-module.git ../memc-nginx-module
   - git clone https://github.com/openresty/headers-more-nginx-module.git ../headers-more-nginx-module
   - git clone https://github.com/openresty/lua-resty-lrucache.git ../lua-resty-lrucache
-  - git clone https://github.com/openresty/lua-resty-core.git ../lua-resty-core
+  - git clone -b feat/ssl-server-port https://github.com/halfcrazy/lua-resty-core.git ../lua-resty-core
 
 script:
   - sudo iptables -I OUTPUT 1 -p udp --dport 10086 -j REJECT

src/ngx_stream_lua_ssl_certby.c

@@ -879,6 +879,39 @@ ngx_stream_lua_ffi_ssl_server_name(ngx_stream_lua_request_t *r, char **name,
 }
 
 
+int
+ngx_stream_lua_ffi_ssl_server_port(ngx_stream_lua_request_t *r,
+    unsigned short *server_port, char **err)
+{
+    ngx_ssl_conn_t          *ssl_conn;
+    ngx_connection_t        *c;
+
+    if (r->connection == NULL || r->connection->ssl == NULL) {
+        *err = "bad request";
+        return NGX_ERROR;
+    }
+
+    ssl_conn = r->connection->ssl->connection;
+    if (ssl_conn == NULL) {
+        *err = "bad ssl conn";
+        return NGX_ERROR;
+    }
+
+    c = ngx_ssl_get_connection(ssl_conn);
+
+    switch (c->local_sockaddr->sa_family) {
+
+    case AF_UNIX:
+        *err = "unix domain has no port";
+        return NGX_ERROR;
+
+    default:
+        *server_port = (unsigned short) ngx_inet_get_port(c->local_sockaddr);
+        return NGX_OK;
+    }
+}
+
+
 int
 ngx_stream_lua_ffi_ssl_raw_client_addr(ngx_stream_lua_request_t *r, char **addr,
     size_t *addrlen, int *addrtype, char **err)