isisd: The RFC states that v6 addresses are limited to 16 in a hello packet

The RFC states we can send only up to 16 v6 addresses in a hello packet
and cannot send sub tlv's of that type.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

diff --git a/isisd/isis_tlvs.c b/isisd/isis_tlvs.c
index 5a6c7bc3003718a36561f59771a09a5239482c21..797172e7df9306f0dcae75a37602b1618a5f69a3 100644 (file)
--- a/isisd/isis_tlvs.c
+++ b/isisd/isis_tlvs.c
@@ -3253,13 +3253,18 @@ void isis_tlvs_add_ipv6_addresses(struct isis_tlvs *tlvs,
 {
        struct listnode *node;
        struct prefix_ipv6 *ip_addr;
+       unsigned int addr_count = 0;
 
        for (ALL_LIST_ELEMENTS_RO(addresses, node, ip_addr)) {
+               if (addr_count >= 15)
+                       break;
+
                struct isis_ipv6_address *a =
                        XCALLOC(MTYPE_ISIS_TLV, sizeof(*a));
 
                a->addr = ip_addr->prefix;
                append_item(&tlvs->ipv6_address, (struct isis_item *)a);
+               addr_count++;
        }
 }