check_icmp: emit error if multiple protocol version

As we do not support checking both IPv4 and IPv6 hosts in one execution
we emit an error if multiple protocol versions are defined in the cmd
line args.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/plugins-root/check_icmp.c b/plugins-root/check_icmp.c
index 6a883a82..98891f02 100644
--- a/plugins-root/check_icmp.c
+++ b/plugins-root/check_icmp.c
@@ -467,10 +467,14 @@ main(int argc, char **argv)
                         unsigned short size;
                         switch(arg) {
                         case '4':
+                                if (address_family != -1)
+                                        crash("Multiple protocol versions not supported");
                                 address_family = AF_INET;
                                 break;
                         case '6':
 #ifdef USE_IPV6
+                                if (address_family != -1)
+                                        crash("Multiple protocol versions not supported");
                                 address_family = AF_INET6;
 #else
                                 usage (_("IPv6 support not available\n"));