X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=dccp_recv.c;h=a0f8371efae6b0974a4f9c88ef1365b208a48eda;hp=647d31a671c4e87fb0eb999385cf21379374b10e;hb=081ea8699e6a309c44446884b8c3752529d96a25;hpb=ed0c68b07ddbc130e033035baa1cc0862e511b46

diff --git a/dccp_recv.c b/dccp_recv.c
index 647d31a6..a0f8371e 100644
--- a/dccp_recv.c
+++ b/dccp_recv.c
@@ -57,12 +57,25 @@ static int dccp_recv_open(struct receiver_node *rn)
 {
 	struct private_dccp_recv_data *pdd;
 	struct dccp_recv_args_info *conf = rn->conf;
-	int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg,
-	                       conf->port_arg, NULL);
+	struct flowopts *fo = NULL;
+	uint8_t *ccids = NULL;
+	int fd, ret, i;
 
-	if (ret < 0)
-		return ret;
-	fd = ret;
+	/* Copy CCID preference list (u8 array required) */
+	if (conf->ccid_given) {
+		ccids = para_malloc(conf->ccid_given);
+		fo    = flowopt_new();
+
+		for (i = 0; i < conf->ccid_given; i++)
+			ccids[i] = conf->ccid_arg[i];
+
+		OPT_ADD(fo, SOL_DCCP, DCCP_SOCKOPT_CCID, ccids, i);
+	}
+
+	fd = makesock(IPPROTO_DCCP, 0, conf->host_arg, conf->port_arg, fo);
+	free(ccids);
+	if (fd < 0)
+		return fd;
 	/*
 	 * Disable unused CCIDs: the receiver does not send any application
 	 * data to the server. By shutting down this unused path we reduce
@@ -85,11 +98,37 @@ err:
 	return ret;
 }
 
+/**
+ * Check whether the host supports the requested 'ccid' arguments.
+ * \param conf DCCP receiver arguments.
+ * \return True if all CCIDs requested in \a conf are supported.
+ */
+static bool dccp_recv_ccid_support_check(struct dccp_recv_args_info *conf)
+{
+	uint8_t ccids[DCCP_MAX_HOST_CCIDS];
+	uint8_t nccids = sizeof(ccids), i, j;
+
+	if (dccp_available_ccids(ccids, &nccids) == NULL)
+		return false;
+
+	for (i = 0; i < conf->ccid_given; i++) {
+		for (j = 0; j < nccids && ccids[j] != conf->ccid_arg[i]; j++)
+			;
+		if (j == nccids) {
+			PARA_ERROR_LOG("'CCID-%d' not supported on this host.\n",
+					conf->ccid_arg[i]);
+			return false;
+		}
+	}
+	return true;
+}
+
 static void *dccp_recv_parse_config(int argc, char **argv)
 {
-	struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
+	struct dccp_recv_args_info *tmp = para_calloc(sizeof(*tmp));
 
-	if (!dccp_recv_cmdline_parser(argc, argv, tmp))
+	if (!dccp_recv_cmdline_parser(argc, argv, tmp) &&
+	    dccp_recv_ccid_support_check(tmp))
 		return tmp;
 	free(tmp);
 	return NULL;