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Change-Id: I6a4444e3c193dae437cd7929f4c39aba7b749efa
diff --git a/libfdcore/tcp.c b/libfdcore/tcp.c
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+/*********************************************************************************************************
+* Software License Agreement (BSD License) *
+* Author: Sebastien Decugis <sdecugis@freediameter.net> *
+* *
+* Copyright (c) 2013, WIDE Project and NICT *
+* All rights reserved. *
+* *
+* Redistribution and use of this software 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 the WIDE Project or NICT nor the *
+* names of its contributors may be used to endorse or *
+* promote products derived from this software without *
+* specific prior written permission of WIDE Project and *
+* NICT. *
+* *
+* 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 OWNER 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. *
+*********************************************************************************************************/
+
+#include "fdcore-internal.h"
+#include "cnxctx.h"
+
+#include <netinet/tcp.h>
+#include <netinet/ip6.h>
+#include <sys/socket.h>
+
+/* Set the socket options for TCP sockets, before bind is called */
+static int fd_tcp_setsockopt(int family, int sk)
+{
+ int ret = 0;
+ int opt;
+
+ /* Clear the NODELAY option in case it was set, as requested by rfc3539#section-3.2 */
+ /* Note that this is supposed to be the default, so we could probably remove this call ... */
+ opt = 0;
+ ret = setsockopt(sk, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
+ if (ret != 0) {
+ ret = errno;
+ TRACE_DEBUG(INFO, "Unable to set the socket TCP_NODELAY option: %s", strerror(ret));
+ return ret;
+ }
+
+ /* Under Linux, we may also set the TCP_CONGESTION option to one of the following strings:
+ - reno (default)
+ - bic
+ - cubic
+ - highspeed
+ - htcp
+ - hybla
+ - illinois
+ - lp
+ - scalable
+ - vegas
+ - veno
+ - westwood
+ - yeah
+ */
+
+ /* In case of v6 address, force the v6only option, we use a different socket for v4 */
+ #ifdef IPV6_V6ONLY
+ if (family == AF_INET6) {
+ opt = 1;
+ CHECK_SYS(setsockopt(sk, IPPROTO_IPV6, IPV6_V6ONLY, &opt, sizeof(opt)));
+ }
+ #endif /* IPV6_V6ONLY */
+
+ {
+ opt = 1;
+ CHECK_SYS( setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) );
+ }
+
+ /* There are also others sockopt that can be set, but nothing useful for us AFAICT */
+
+ return 0;
+}
+
+/* Create a socket server and bind it */
+int fd_tcp_create_bind_server( int * sock, sSA * sa, socklen_t salen )
+{
+ TRACE_ENTRY("%p %p %d", sock, sa, salen);
+
+ CHECK_PARAMS( sock && sa );
+
+ /* Create the socket */
+ CHECK_SYS( *sock = socket(sa->sa_family, SOCK_STREAM, IPPROTO_TCP) );
+
+ /* Set the socket options */
+ CHECK_FCT( fd_tcp_setsockopt(sa->sa_family, *sock) );
+
+ /* Bind the socket */
+ CHECK_SYS( bind( *sock, sa, salen ) );
+
+ /* We're done */
+ return 0;
+}
+
+/* Allow clients connections on server sockets */
+int fd_tcp_listen( int sock )
+{
+ TRACE_ENTRY("%d", sock);
+ CHECK_SYS( listen(sock, 5) );
+ return 0;
+}
+
+/* Create a client socket and connect to remote server */
+int fd_tcp_client( int *sock, sSA * sa, socklen_t salen )
+{
+ int ret = 0;
+ int s;
+
+ TRACE_ENTRY("%p %p %d", sock, sa, salen);
+ CHECK_PARAMS( sock && (*sock <= 0) && sa && salen );
+
+ /* Create the socket */
+ CHECK_SYS( s = socket(sa->sa_family, SOCK_STREAM, IPPROTO_TCP) );
+
+ /* Set the socket options */
+ CHECK_FCT( fd_tcp_setsockopt(sa->sa_family, s) );
+
+ /* Cleanup if we are cancelled */
+ pthread_cleanup_push(fd_cleanup_socket, &s);
+
+ /* Try connecting to the remote address */
+ ret = connect(s, sa, salen);
+
+ pthread_cleanup_pop(0);
+
+ if (ret < 0) {
+ ret = errno;
+ LOG_A( "connect returned an error: %s", strerror(ret));
+ CHECK_SYS_DO( close(s), /* continue */ );
+ *sock = -1;
+ return ret;
+ }
+
+ /* Done! */
+ *sock = s;
+ return ret;
+}
+
+/* Get the remote name of a TCP socket */
+int fd_tcp_get_remote_ep(int sock, sSS * ss, socklen_t *sl)
+{
+ TRACE_ENTRY("%d %p %p", sock, ss, sl);
+ CHECK_PARAMS( ss && sl );
+
+ *sl = sizeof(sSS);
+ CHECK_SYS(getpeername(sock, (sSA *)ss, sl));
+
+ return 0;
+}
+