[2/2] CIFS: Add match_port check during looking for an existing connection

Commit Message

Pavel Shilovsky Nov. 14, 2010, 6:49 p.m. UTC

None

Patch

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 01ebcc4..7130dd7 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1435,6 +1435,34 @@  srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
 	}
 }
 
+static bool
+match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
+{
+	struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
+	struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
+	unsigned short int port;
+
+	/* search for a connection with the default port if user doesn't
+	   specify the port manually */
+	port = htons(CIFS_PORT);
+
+	switch (addr->sa_family) {
+	case AF_INET:
+		if (addr4->sin_port)
+			port = addr4->sin_port;
+		if (port != server->addr.sockAddr.sin_port)
+			return false;
+		break;
+	case AF_INET6:
+		if (addr6->sin6_port)
+			port = addr6->sin6_port;
+		if (port != server->addr.sockAddr6.sin6_port)
+			return false;
+		break;
+	}
+
+	return true;
+}
 
 static bool
 match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
@@ -1448,9 +1476,6 @@  match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
 		if (addr4->sin_addr.s_addr !=
 		    server->addr.sockAddr.sin_addr.s_addr)
 			return false;
-		if (addr4->sin_port &&
-		    addr4->sin_port != server->addr.sockAddr.sin_port)
-			return false;
 		break;
 	case AF_INET6:
 		if (!ipv6_addr_equal(&addr6->sin6_addr,
@@ -1459,9 +1484,6 @@  match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
 		if (addr6->sin6_scope_id !=
 		    server->addr.sockAddr6.sin6_scope_id)
 			return false;
-		if (addr6->sin6_port &&
-		    addr6->sin6_port != server->addr.sockAddr6.sin6_port)
-			return false;
 		break;
 	}
 
@@ -1530,6 +1552,9 @@  cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
 				   (struct sockaddr *)&vol->srcaddr))
 			continue;
 
+		if (!match_port(server, addr))
+			continue;
+
 		if (!match_security(server, vol))
 			continue;