--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/apps/tca_admin/libs/gateway_rpc.c Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2006 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <dtn-config.h>
+#endif
+
+#include "gateway_rpc.h"
+#include "gateway_prot.h"
+#include <sys/socket.h> // needed for AF_INET
+#include <netdb.h> // needed for gethostbyname
+#include <string.h>
+#include <stdio.h>
+
+static const int DHT_PORT = 5852;
+
+///////////////////////////////////////////////////////////////////////////////
+// Functions for interfacing with OpenDHT
+
+// lookup hostname, store address in addr
+int
+lookup_host(const char* host, int port, struct sockaddr_in* addr)
+{
+ struct hostent* h = gethostbyname (host);
+ if (h == NULL) return 0;
+
+ bzero (addr, sizeof(struct sockaddr_in));
+ addr->sin_family = AF_INET;
+ addr->sin_port = htons(port);
+
+ // demmer: rewrote the following as a memcpy to avoid -Wcast-align bugs
+ //addr->sin_addr = *((struct in_addr *) h->h_addr);
+ memcpy(&addr->sin_addr, h->h_addr, sizeof(struct in_addr));
+ return 1;
+}
+
+
+// try to open connection to given dht node by addr
+CLIENT*
+get_connection(struct sockaddr_in* addr)
+{
+ int sockp = RPC_ANYSOCK;
+ CLIENT * c = clnttcp_create(addr, BAMBOO_DHT_GATEWAY_PROGRAM,
+ BAMBOO_DHT_GATEWAY_VERSION, &sockp, 0, 0);
+ return c;
+}
+
+
+/*
+// try to open connection to given dht node by hostname
+static CLIENT*
+get_connection(const char* hostname)
+{
+ struct sockaddr_in addr;
+ if(lookup_host(hostname, DHT_PORT, &addr) < 0) return NULL;
+ return get_connection(addr);
+}
+*/
+
+
+// useful for probing a dht node to see if it's alive:
+int
+do_null_op(CLIENT* c)
+{
+ void* null_args = NULL;
+ void* res = bamboo_dht_proc_null_2(&null_args, c);
+ return (res != NULL);
+}
+
+
+// test dht node, printing status messages
+// if successful, addr contains a valid sockaddr_in
+int
+test_node(const char* hostname, struct sockaddr_in* addr)
+{
+ printf(" testing dht node %s... ", hostname);
+
+ // try to get host addr
+ if (!lookup_host(hostname, DHT_PORT, addr))
+ {
+ printf("lookup_host failed\n");
+ return 0;
+ }
+
+ // try to connect to node
+ // Note: This step seems to be insanely slow when it fails. Is there
+ // a way to timeout faster?
+ CLIENT* p_client = get_connection(addr);
+ if (p_client == NULL)
+ {
+ printf("get_connection failed\n");
+ return 0;
+ }
+
+ // try a null op
+ if (!do_null_op(p_client))
+ {
+ printf("null_op failed\n");
+ clnt_destroy(p_client);
+ return 0;
+ }
+
+ printf("succeeded.\n");
+ clnt_destroy(p_client);
+ return 1;
+}