implemented DHCPv6 Decline message processing on DHCPv6 server.

1 files changed, 25 insertions, 0 deletions

diff --git a/lease.c b/lease.c
index fdf3d37..d46ddfd 100644
--- a/lease.c
+++ b/lease.c
@@ -56,8 +56,12 @@
 struct hash_entry {
 	LIST_ENTRY(hash_entry) list;
 	char *val;
+	char flag;	/* 0x01: DHCP6_LEASE_DECLINED */
 };
 
+/* marked as declined (e.g. someone has been using the same address) */
+#define	DHCP6_LEASE_DECLINED	0x01	
+
 LIST_HEAD(hash_head, hash_entry);
 
 typedef unsigned int (*pfn_hash_t)(void *val) ;
@@ -141,6 +145,27 @@ release_address(addr)
 	}
 }
 
+void
+decline_address(addr)
+	struct in6_addr *addr;
+{
+	struct hash_entry *entry;
+
+	if (!addr)
+		return;
+
+	dprintf(LOG_DEBUG, FNAME, "addr=%s", in6addr2str(addr, 0));
+
+	entry = hash_table_find(&dhcp6_lease_table, addr);
+	if (entry == NULL) {
+		dprintf(LOG_WARNING, FNAME, "not found: %s",
+			in6addr2str(addr, 0));
+		return;
+	}
+
+	entry->flag |= DHCP6_LEASE_DECLINED;
+}
+
 int
 is_leased(addr)
 	struct in6_addr *addr;