Fix IPv6 DNS server adddress selection

[project/odhcpd.git] / src / odhcpd.c

diff --git a/src/odhcpd.c b/src/odhcpd.c
index 0edf63e..3c384e8 100644 (file)
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -263,6 +263,25 @@ ssize_t odhcpd_get_interface_addresses(int ifindex,
        return ret;
 }
 
        return ret;
 }
 

+int odhcpd_get_preferred_interface_address(int ifindex, struct in6_addr *addr)
+{
+       struct odhcpd_ipaddr ipaddrs[8];
+       ssize_t ip_cnt = odhcpd_get_interface_addresses(ifindex, ipaddrs, ARRAY_SIZE(ipaddrs));
+       uint32_t preferred = 0;
+       int ret = 0;
+
+       for (ssize_t i = 0; i < ip_cnt; i++) {
+               struct odhcpd_ipaddr *ipaddr = &ipaddrs[i];
+
+               if (ipaddr->preferred > preferred || !preferred) {
+                       preferred = ipaddr->preferred;
+                       *addr = ipaddr->addr;
+                       ret = 1;
+               }
+       }
+
+       return ret;
+}

 
 struct interface* odhcpd_get_interface_by_index(int ifindex)
 {
 
 struct interface* odhcpd_get_interface_by_index(int ifindex)
 {