+
+/**
+ * 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
+ }
+#if !defined( UDPLITE_RECV_CSCOV ) && !defined( DCCP_SOCKOPT_SEND_CSCOV )
+ VLC_UNUSED(sendcov);
+ VLC_UNUSED(recvcov);
+#endif
+
+ return VLC_EGENERIC;
+}