socket-util: Remove 'passcred' parameter from make_unix_socket().

Nothing in the tree ever tries to send or receive credentials over a Unix
domain socket so there's no point in configuring them to be received.

Signed-off-by: Ben Pfaff <blp@nicira.com>

lib/socket-util.c

@@ -384,12 +384,11 @@ bind_unix_socket(int fd, struct sockaddr *sun, socklen_t sun_len)
 /* Creates a Unix domain socket in the given 'style' (either SOCK_DGRAM or
  * SOCK_STREAM) that is bound to '*bind_path' (if 'bind_path' is non-null) and
  * connected to '*connect_path' (if 'connect_path' is non-null).  If 'nonblock'
- * is true, the socket is made non-blocking.  If 'passcred' is true, the socket
+ * is true, the socket is made non-blocking.
- * is configured to receive SCM_CREDENTIALS control messages.
  *
  * Returns the socket's fd if successful, otherwise a negative errno value. */
 int
-make_unix_socket(int style, bool nonblock, bool passcred OVS_UNUSED,
+make_unix_socket(int style, bool nonblock,
                  const char *bind_path, const char *connect_path)
 {
     int error;
@@ -457,16 +456,6 @@ make_unix_socket(int style, bool nonblock, bool passcred OVS_UNUSED,
         }
     }
 
-#ifdef SCM_CREDENTIALS
-    if (passcred) {
-        int enable = 1;
-        if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable))) {
-            error = errno;
-            goto error;
-        }
-    }
-#endif
-
     return fd;
 
 error:

lib/socket-util.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,7 +38,7 @@ int get_socket_rcvbuf(int sock);
 int check_connection_completion(int fd);
 int drain_rcvbuf(int fd);
 void drain_fd(int fd, size_t n_packets);
-int make_unix_socket(int style, bool nonblock, bool passcred,
+int make_unix_socket(int style, bool nonblock,
                      const char *bind_path, const char *connect_path);
 int get_unix_name_len(socklen_t sun_len);
 ovs_be32 guess_netmask(ovs_be32 ip);

lib/stream-unix.c

@@ -46,7 +46,7 @@ unix_open(const char *name, char *suffix, struct stream **streamp,
     const char *connect_path = suffix;
     int fd;
 
-    fd = make_unix_socket(SOCK_STREAM, true, false, NULL, connect_path);
+    fd = make_unix_socket(SOCK_STREAM, true, NULL, connect_path);
     if (fd < 0) {
         VLOG_ERR("%s: connection failed (%s)", connect_path, strerror(-fd));
         return -fd;
@@ -79,7 +79,7 @@ punix_open(const char *name OVS_UNUSED, char *suffix,
 {
     int fd, error;
 
-    fd = make_unix_socket(SOCK_STREAM, true, true, suffix, NULL);
+    fd = make_unix_socket(SOCK_STREAM, true, suffix, NULL);
     if (fd < 0) {
         VLOG_ERR("%s: binding failed: %s", suffix, strerror(errno));
         return errno;

tests/test-unix-socket.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Nicira, Inc.
+ * Copyright (c) 2010, 2012 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,7 +42,7 @@ main(int argc, char *argv[])
     alarm(5);
 
     /* Create a listening socket under name 'sockname1'. */
-    sock1 = make_unix_socket(SOCK_STREAM, false, false, sockname1, NULL);
+    sock1 = make_unix_socket(SOCK_STREAM, false, sockname1, NULL);
     if (sock1 < 0) {
         ovs_fatal(-sock1, "%s: bind failed", sockname1);
     }
@@ -52,7 +52,7 @@ main(int argc, char *argv[])
 
     /* Connect to 'sockname2' (which should be the same file, perhaps under a
      * different name). */
-    sock2 = make_unix_socket(SOCK_STREAM, false, false, NULL, sockname2);
+    sock2 = make_unix_socket(SOCK_STREAM, false, NULL, sockname2);
     if (sock2 < 0) {
         ovs_fatal(-sock2, "%s: connect failed", sockname2);
     }