prefix SOCKET symbols with rk_

lib/roken/sendmsg.c

@@ -35,8 +35,10 @@
 
 #include "roken.h"
 
+#ifndef _WIN32
+
 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
-sendmsg(SOCKET s, const struct msghdr *msg, int flags)
+sendmsg(rk_socket_t s, const struct msghdr *msg, int flags)
 {
     ssize_t ret;
     size_t tot = 0;
@@ -60,3 +62,87 @@ sendmsg(SOCKET s, const struct msghdr *msg, int flags)
     free (buf);
     return ret;
 }
+
+#else /* _WIN32 */
+
+/***********************************************************************
+ * Copyright (c) 2009, Secure Endpoints Inc.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ * 
+ * - Neither the name of Secure Endpoints Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ **********************************************************************/
+
+/*
+ * Implementation of sendmsg() for WIN32
+ *
+ * We are using a contrived definition of msghdr which actually uses
+ * an array of ::_WSABUF structures instead of ::iovec .  This allows
+ * us to call WSASend directly using the given ::msghdr instead of
+ * having to allocate another array of ::_WSABUF and copying data for
+ * each call.
+ *
+ * Limitations:
+ *
+ * - msg->msg_name is ignored.  So is msg->control.
+ * - WSASend() only supports ::MSG_DONTROUTE, ::MSG_OOB and
+ *   ::MSG_PARTIAL.
+ *
+ * @param[in] s The socket to use.
+ * @param[in] msg The message
+ * @param[in] flags Flags.  A combination of ::MSG_DONTROUTE,
+ *  ::MSG_OOB and ::MSG_PARTIAL
+ *
+ * @return The number of bytes sent, on success.  Or -1 on error.
+ */
+ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
+sendmsg_w32(rk_socket_t s, const struct msghdr * msg, int flags)
+{
+    int srv;
+    DWORD num_bytes_sent = 0;
+
+    /* TODO: For _WIN32_WINNT >= 0x0600 we can use WSASendMsg using
+       WSAMSG which is a much more direct analogue to sendmsg(). */
+
+    srv = WSASend(s, msg->msg_iov, msg->msg_iovlen,
+		  &num_bytes_sent, flags, NULL, NULL);
+
+    if (srv == 0)
+	return (int) num_bytes_sent;
+
+    /* srv == SOCKET_ERROR and WSAGetLastError() == WSA_IO_PENDING
+       indicates that a non-blocking transfer has been scheduled.
+       We'll have to check for that if we ever support non-blocking
+       I/O. */
+
+    return -1;
+}
+
+#endif /* !_WIN32 */