* is_public_client() now caches the IP addresses of all hosts in

[citadel.git] / citadel / locate_host.c

diff --git a/citadel/locate_host.c b/citadel/locate_host.c
index 5ef13c8eb6df5f937bf76fef70e03ea0519c484e..31d65c9afdd1f5576f6edd5ddf318bef9fb4fad1 100644 (file)
--- a/citadel/locate_host.c
+++ b/citadel/locate_host.c
@@ -145,3 +145,27 @@ int rbl_check(char *message_to_spammer) {
        }
        return(0);
 }
+
+/*
+ * Convert a host name to a dotted quad address. 
+ * Returns zero on success or nonzero on failure.
+ */
+int hostname_to_dotted_quad(char *addr, char *host) {
+       struct hostent *ch;
+       const char *i;
+       int a1, a2, a3, a4;
+
+       ch = gethostbyname(host);
+       if (ch == NULL) {
+               strcpy(addr, "0.0.0.0");
+               return(1);
+       }
+
+       i = (const char *) ch->h_addr_list[0];
+       a1 = ((*i++) & 0xff);
+       a2 = ((*i++) & 0xff);
+       a3 = ((*i++) & 0xff);
+       a4 = ((*i++) & 0xff);
+       sprintf(addr, "%d.%d.%d.%d", a1, a2, a3, a4);
+       return(0);
+}