X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fnetwork%2Fudp.c;h=9316cb4aa4130ef4524194c4423efb576a844be8;hb=6ee1e193fd896ab9a4729fde14f009d9ce629815;hp=fe486afb88ae9fa5f931040f3548e1ad519486dd;hpb=825269523f1396fedbab720d03f45fe1f001ccd8;p=vlc

diff --git a/src/network/udp.c b/src/network/udp.c
index fe486afb88..9316cb4aa4 100644
--- a/src/network/udp.c
+++ b/src/network/udp.c
@@ -27,7 +27,6 @@
 /*****************************************************************************
  * Preamble
  *****************************************************************************/
-#include <stdlib.h>
 #include <vlc/vlc.h>
 
 #include <errno.h>
@@ -61,7 +60,34 @@
 # define SOL_IPV6 IPPROTO_IPV6
 #endif
 #ifndef IPPROTO_IPV6
-# define IPPROTO_IPV6 41
+# define IPPROTO_IPV6 41 /* IANA */
+#endif
+#ifndef SOL_DCCP
+# define SOL_DCCP IPPROTO_DCCP
+#endif
+#ifndef IPPROTO_DCCP
+# define IPPROTO_DCCP 33 /* IANA */
+#endif
+#ifndef SOL_UDPLITE
+# define SOL_UDPLITE IPPROTO_UDPLITE
+#endif
+#ifndef IPPROTO_UDPLITE
+# define IPPROTO_UDPLITE 136 /* IANA */
+#endif
+
+#ifdef __linux__
+# include <linux/dccp.h>
+# ifndef SOCK_DCCP /* provisional API */
+#  define SOCK_DCCP 6
+# endif
+#endif
+
+#if defined (HAVE_NETINET_UDPLITE_H)
+# include <netinet/udplite.h>
+#elif defined (__linux__)
+/* still missing from glibc 2.6 */
+# define UDPLITE_SEND_CSCOV     10
+# define UDPLITE_RECV_CSCOV     11
 #endif
 
 extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
@@ -157,7 +183,7 @@ static int net_SetMcastHopLimit( vlc_object_t *p_this,
 {
     int proto, cmd;
 
-    /* There is some confusion in the world whether IP_MULTICAST_TTL 
+    /* There is some confusion in the world whether IP_MULTICAST_TTL
      * takes a byte or an int as an argument.
      * BSD seems to indicate byte so we are going with that and use
      * int as a fallback to be safe */
@@ -490,7 +516,7 @@ net_SourceSubscribe (vlc_object_t *obj, int fd,
 
     msg_Dbg (obj, "Multicast %sgroup join request", src ? "source " : "");
 
-    if (setsockopt (fd, level, 
+    if (setsockopt (fd, level,
                     src ? MCAST_JOIN_SOURCE_GROUP : MCAST_JOIN_GROUP,
                     (void *)&opt, optlen) == 0)
         return 0;
@@ -803,3 +829,65 @@ int __net_OpenDgram( vlc_object_t *obj, const char *psz_bind, int i_bind,
     return val;
 }
 
+
+/**
+ * net_SetCSCov:
+ * Sets the send and receive checksum coverage of a socket:
+ * @param fd socket
+ * @param sendcov payload coverage of sent packets (bytes), -1 for full
+ * @param recvcov minimum payload coverage of received packets, -1 for full
+ */
+int net_SetCSCov (int fd, int sendcov, int recvcov)
+{
+    int type;
+
+    if (getsockopt (fd, SOL_SOCKET, SO_TYPE,
+                    &type, &(socklen_t){ sizeof (type) }))
+        return VLC_EGENERIC;
+
+    switch (type)
+    {
+#ifdef UDPLITE_RECV_CSCOV
+        case SOCK_DGRAM: /* UDP-Lite */
+            if (sendcov == -1)
+                sendcov = 0;
+            else
+                sendcov += 8; /* partial */
+            if (setsockopt (fd, SOL_UDPLITE, UDPLITE_SEND_CSCOV, &sendcov,
+                            sizeof (sendcov)))
+                return VLC_EGENERIC;
+
+            if (recvcov == -1)
+                recvcov = 0;
+            else
+                recvcov += 8;
+            if (setsockopt (fd, SOL_UDPLITE, UDPLITE_RECV_CSCOV,
+                            &recvcov, sizeof (recvcov)))
+                return VLC_EGENERIC;
+
+            return VLC_SUCCESS;
+#endif
+#ifdef DCCP_SOCKOPT_SEND_CSCOV
+        case SOCK_DCCP: /* DCCP and its ill-named socket type */
+            if ((sendcov == -1) || (sendcov > 56))
+                sendcov = 0;
+            else
+                sendcov = (sendcov + 3) / 4;
+            if (setsockopt (fd, SOL_DCCP, DCCP_SOCKOPT_SEND_CSCOV,
+                            &sendcov, sizeof (sendcov)))
+                return VLC_EGENERIC;
+
+            if ((recvcov == -1) || (recvcov > 56))
+                recvcov = 0;
+            else
+                recvcov = (recvcov + 3) / 4;
+            if (setsockopt (fd, SOL_DCCP, DCCP_SOCKOPT_RECV_CSCOV,
+                            &recvcov, sizeof (recvcov)))
+                return VLC_EGENERIC;
+
+            return VLC_SUCCESS;
+#endif
+    }
+
+    return VLC_EGENERIC;
+}