check_icmp: Correctly set address_family on lookup

If a hostname is supplied instead of an IP address, the automatic
address family detection would fail to correctly set the IP protocol
version (it would always be IPv6).

We now supply AF_UNSPEC to getaddrinfo, which should then return the
correct address family in the result.

Signed-off-by: Jacob Hansen <jhansen@op5.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/plugins-root/check_icmp.c b/plugins-root/check_icmp.c
index 749e2d4..1a2a177 100644
--- a/plugins-root/check_icmp.c
+++ b/plugins-root/check_icmp.c
@@ -1362,13 +1362,14 @@ add_target(char *arg)
         else {
                 errno = 0;
                 memset(&hints, 0, sizeof(hints));
-                hints.ai_family = address_family == AF_INET ? PF_INET : PF_INET6;
+                hints.ai_family = AF_UNSPEC;
                 hints.ai_socktype = SOCK_RAW;
                 if((error = getaddrinfo(arg, NULL, &hints, &res)) != 0) {
                         errno = 0;
                         crash("Failed to resolve %s: %s", arg, gai_strerror(error));
                         return -1;
                 }
+                address_family = res->ai_family;
         }
 
         /* possibly add all the IP's as targets */