Handle failed gethostbyname of mcast address

diff --git a/src/comm.cc b/src/comm.cc
index 2feba8d8ccd3aeed965a392bb44583718c158f45..a5177e952d6d41115e4e0130755a38ebc88076c6 100644 (file)
--- a/src/comm.cc
+++ b/src/comm.cc
@@ -1,6 +1,6 @@
 
 /*
- * $Id: comm.cc,v 1.136 1997/02/19 00:06:14 wessels Exp $
+ * $Id: comm.cc,v 1.137 1997/02/19 17:06:51 wessels Exp $
  *
  * DEBUG: section 5     Socket Functions
  * AUTHOR: Harvest Derived
@@ -1162,6 +1162,10 @@ comm_join_mcast_groups(int fd)
        debug(5, 10, "comm_join_mcast_groups: joining group %s on FD %d\n",
            s->key, fd);
        ia = ipcache_gethostbyname(s->key, IP_BLOCKING_LOOKUP);
+       if (ia == NULL) {
+           debug(5, 0, "Unknown host: %s\n", s->key);
+           continue;
+       }
        for (i = 0; i < ia->count; i++) {
            mr.imr_multiaddr.s_addr = (ia->in_addrs + i)->s_addr;
            mr.imr_interface.s_addr = INADDR_ANY;
@@ -1507,7 +1511,7 @@ comm_write(int fd, char *buf, int size, int timeout, rw_complete_handler * handl
        fd, size, timeout, handler, handler_data);
 
     if (fd_table[fd].rwstate) {
-       debug(5, 1, "WARNING! FD %d: A comm_write is already active.\n", fd);
+       debug(5, 1, "WARNING: FD %d: A comm_write is already active.\n", fd);
        RWStateCallbackAndFree(fd, COMM_ERROR);
     }
     state = xcalloc(1, sizeof(RWStateData));