add function to set the target for UDP rpc calls.

including doing broadcast calls

diff --git a/include/libnfs-private.h b/include/libnfs-private.h
index 883745b5c7b11e60e9d360d2b57a39373ca205d1..1d59fafa61f9e5680bd291300f0b0a088293e9f1 100644 (file)
--- a/include/libnfs-private.h
+++ b/include/libnfs-private.h
@@ -78,4 +78,5 @@ struct rpc_context *nfs_get_rpc_context(struct nfs_context *nfs);
 
 /* we dont want to expose UDP to normal applications/users  this is private to libnfs to use exclusively for broadcast RPC */
 int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port);
+int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast);
 struct rpc_context *rpc_init_udp_context(void);

diff --git a/lib/socket.c b/lib/socket.c
index 3e4ad05062011041ecb002bd24589850a2ed244c..a26afe1e6b194e46bea861e1974705b9d56a5bd1 100644 (file)
--- a/lib/socket.c
+++ b/lib/socket.c
@@ -388,3 +388,37 @@ int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port)
        return 0;
 }
 
+int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast)
+{
+       struct addrinfo *ai = NULL;
+       char service[6];
+
+       if (rpc->is_udp == 0) {
+               rpc_set_error(rpc, "Can not set destination sockaddr. Not UDP context");
+               return -1;
+       }
+
+       snprintf(service, 6, "%d", port);
+       if (getaddrinfo(addr, service, NULL, &ai) != 0) {
+               rpc_set_error(rpc, "Invalid address:%s. "
+                       "Can not resolv into IPv4/v6 structure.");
+               return -1;
+       }
+
+       if (rpc->udp_dest) {
+               free(rpc->udp_dest);
+               rpc->udp_dest = NULL;
+       }
+       rpc->udp_dest = malloc(ai->ai_addrlen);
+       if (rpc->udp_dest == NULL) {
+               rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure");
+               return -1;
+       }
+       memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen);
+       freeaddrinfo(ai);
+
+       rpc->is_broadcast = is_broadcast;
+       setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, &is_broadcast, sizeof(is_broadcast));
+
+       return 0;
+}