diff options
| -rw-r--r-- | trafgen_l4.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/trafgen_l4.c b/trafgen_l4.c index 89bb252..7ec017e 100644 --- a/trafgen_l4.c +++ b/trafgen_l4.c @@ -202,39 +202,45 @@ static void icmpv6_header_init(struct proto_hdr *hdr) proto_header_fields_add(hdr, icmpv6_fields, array_size(icmpv6_fields)); } -static void icmpv6_packet_finish(struct proto_hdr *hdr) +static void icmpv6_csum_update(struct proto_hdr *hdr) { struct proto_hdr *lower = proto_lower_header(hdr); - struct packet *pkt = current_packet(); + struct packet *pkt = packet_get(hdr->pkt_id); uint16_t total_len; uint16_t csum; - if (proto_field_is_set(hdr, ICMPV6_CSUM)) + if (unlikely(!lower)) return; - - if (!lower) + if (hdr->is_csum_valid) + return; + if (proto_field_is_set(hdr, ICMPV6_CSUM)) return; total_len = pkt->len - hdr->pkt_offset; - switch (lower->ops->id) { - case PROTO_IP6: + proto_field_set_be16(hdr, ICMPV6_CSUM, 0); + + if (likely(lower->ops->id == 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)); + hdr->is_csum_valid = true; } +} - proto_field_set_be16(hdr, ICMPV6_CSUM, bswap_16(csum)); +static void icmpv6_field_changed(struct proto_field *field) +{ + field->hdr->is_csum_valid = false; } static struct proto_ops icmpv6_proto_ops = { .id = PROTO_ICMP6, .layer = PROTO_L4, .header_init = icmpv6_header_init, - .packet_finish = icmpv6_packet_finish, + .packet_finish = icmpv6_csum_update, + .packet_update = icmpv6_csum_update, + .field_changed = icmpv6_field_changed, }; void protos_l4_init(void) |