Introduce .is_local method for connection layer (#11672)

Introduce .is_local method to connection, and implement for TCP/TLS/
Unix socket, also drop 'int islocalClient(client *c)'. Then we can
hide the detail into the specific connection types.
Uplayer tests a connection is local or not by abstract method only.

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/connection.h b/src/connection.h
index 62dc8d157..da8b1b7c7 100644
--- a/src/connection.h
+++ b/src/connection.h
@@ -78,6 +78,7 @@ typedef struct ConnectionType {
     void (*ae_handler)(struct aeEventLoop *el, int fd, void *clientData, int mask);
     aeFileProc *accept_handler;
     int (*addr)(connection *conn, char *ip, size_t ip_len, int *port, int remote);
+    int (*is_local)(connection *conn);
     int (*listen)(connListener *listener);
 
     /* create/shutdown/close connection */
@@ -315,6 +316,16 @@ static inline int connAddrSockName(connection *conn, char *ip, size_t ip_len, in
     return connAddr(conn, ip, ip_len, port, 0);
 }
 
+/* Test a connection is local or loopback.
+ * Return -1 on failure, 0 is not a local connection, 1 is a local connection */
+static inline int connIsLocal(connection *conn) {
+    if (conn && conn->type->is_local) {
+        return conn->type->is_local(conn);
+    }
+
+    return -1;
+}
+
 static inline int connGetState(connection *conn) {
     return conn->state;
 }