Update copyright on all non-GPL files

[openvswitch] / lib / socket-util.c

diff --git a/lib/socket-util.c b/lib/socket-util.c
index 3397fdb3999d83ce6b2e94ffdc45a9aa2308c395..6061d266f1c7a35e42a1e4904a9b27f70d4649ab 100644 (file)
--- a/lib/socket-util.c
+++ b/lib/socket-util.c
@@ -1,22 +1,34 @@
-/* Copyright (C) 2007 Board of Trustees, Leland Stanford Jr. University.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ * 
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ * 
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
  */
 
 #include "socket-util.h"
@@ -24,7 +36,9 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
+#include <poll.h>
 #include <stdio.h>
+#include <string.h>
 
 #include "vlog.h"
 #define THIS_MODULE VLM_socket_util
@@ -36,8 +50,14 @@ set_nonblocking(int fd)
 {
     int flags = fcntl(fd, F_GETFL, 0);
     if (flags != -1) {
-        return fcntl(fd, F_SETFL, flags | O_NONBLOCK) != -1 ? 0 : errno;
+        if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) != -1) {
+            return 0;
+        } else {
+            VLOG_ERR("fcntl(F_SETFL) failed: %s", strerror(errno));
+            return errno;
+        }
     } else {
+        VLOG_ERR("fcntl(F_GETFL) failed: %s", strerror(errno));
         return errno;
     }
 }
@@ -63,3 +83,38 @@ lookup_ip(const char *host_name, struct in_addr *addr)
     }
     return 0;
 }
+
+/* Returns the error condition associated with socket 'fd' and resets the
+ * socket's error status. */
+int
+get_socket_error(int fd) 
+{
+    int error;
+    socklen_t len = sizeof(error);
+    if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
+        error = errno;
+        VLOG_ERR("getsockopt(SO_ERROR): %s", strerror(error));
+    }
+    return error;
+}
+
+int
+check_connection_completion(int fd) 
+{
+    struct pollfd pfd;
+    int retval;
+
+    pfd.fd = fd;
+    pfd.events = POLLOUT;
+    do {
+        retval = poll(&pfd, 1, 0);
+    } while (retval < 0 && errno == EINTR);
+    if (retval == 1) {
+        return get_socket_error(fd);
+    } else if (retval < 0) {
+        VLOG_ERR("poll: %s", strerror(errno));
+        return errno;
+    } else {
+        return EAGAIN;
+    }
+}