summaryrefslogtreecommitdiff
path: root/trafgen_l4.c
diff options
context:
space:
mode:
Diffstat (limited to 'trafgen_l4.c')
-rw-r--r--trafgen_l4.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/trafgen_l4.c b/trafgen_l4.c
index a5981c4..886e2b2 100644
--- a/trafgen_l4.c
+++ b/trafgen_l4.c
@@ -138,8 +138,57 @@ static struct proto_hdr tcp_hdr = {
.packet_finish = tcp_packet_finish,
};
+static struct proto_field icmpv6_fields[] = {
+ { .id = ICMPV6_TYPE, .len = 1, .offset = 0 },
+ { .id = ICMPV6_CODE, .len = 1, .offset = 1 },
+ { .id = ICMPV6_CSUM, .len = 2, .offset = 2 }
+};
+
+static void icmpv6_header_init(struct proto_hdr *hdr)
+{
+ proto_lower_default_add(hdr, PROTO_IP6);
+
+ proto_header_fields_add(hdr, icmpv6_fields, array_size(icmpv6_fields));
+}
+
+static void icmpv6_packet_finish(struct proto_hdr *hdr)
+{
+ struct proto_hdr *lower = proto_lower_header(hdr);
+ struct packet *pkt = current_packet();
+ uint16_t total_len;
+ uint16_t csum;
+
+ if (proto_field_is_set(hdr, ICMPV6_CSUM))
+ return;
+
+ if (!lower)
+ return;
+
+ total_len = pkt->len - hdr->pkt_offset;
+
+ switch (lower->id) {
+ case PROTO_IP6:
+ csum = p6_csum((void *) proto_header_ptr(lower), proto_header_ptr(hdr),
+ total_len, IPPROTO_ICMPV6);
+ break;
+ default:
+ csum = 0;
+ break;
+ }
+
+ proto_field_set_be16(hdr, ICMPV6_CSUM, bswap_16(csum));
+}
+
+static struct proto_hdr icmpv6_hdr = {
+ .id = PROTO_ICMP6,
+ .layer = PROTO_L4,
+ .header_init = icmpv6_header_init,
+ .packet_finish = icmpv6_packet_finish,
+};
+
void protos_l4_init(void)
{
proto_header_register(&udp_hdr);
proto_header_register(&tcp_hdr);
+ proto_header_register(&icmpv6_hdr);
}