diff options
| author | Vadim Kochan <vadim4j@gmail.com> | 2016-08-13 02:11:17 +0300 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-09-21 09:56:41 +0200 |
| commit | 88169061a70a2363f503f14e686e2b070e6e63ef (patch) | |
| tree | 5d9e1af94bc05e97582662e3f15dc861ef2f2899 | |
| parent | 81ca1cd1c362ae536a6bee260827c395a78dc637 (diff) | |
trafgen: proto: Introduce proto_upper_header() function
Added proto_upper_header() function to fetch upper proto header.
It will be used by IPv4/IPv6 proto header to notify UDP/TCP proto
headers to invalidate L4 csum when L3 pseudo header field was changed.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
| -rw-r--r-- | trafgen_proto.c | 12 | ||||
| -rw-r--r-- | trafgen_proto.h | 1 |
2 files changed, 13 insertions, 0 deletions
diff --git a/trafgen_proto.c b/trafgen_proto.c index b0a198f..f4b2828 100644 --- a/trafgen_proto.c +++ b/trafgen_proto.c @@ -40,6 +40,18 @@ struct proto_hdr *proto_lower_header(struct proto_hdr *hdr) return headers[hdr->index - 1]; } +struct proto_hdr *proto_upper_header(struct proto_hdr *hdr) +{ + struct packet *pkt = packet_get(hdr->pkt_id); + struct proto_hdr **headers = &pkt->headers[0]; + size_t headers_count = pkt->headers_count; + + if (hdr->index == headers_count - 1) + return NULL; + + return headers[hdr->index + 1]; +} + uint8_t *proto_header_ptr(struct proto_hdr *hdr) { return &packet_get(hdr->pkt_id)->payload[hdr->pkt_offset]; diff --git a/trafgen_proto.h b/trafgen_proto.h index 35a55d5..2e50402 100644 --- a/trafgen_proto.h +++ b/trafgen_proto.h @@ -95,6 +95,7 @@ extern struct proto_hdr *proto_lower_default_add(struct proto_hdr *hdr, enum proto_id pid); extern struct proto_hdr *proto_lower_header(struct proto_hdr *hdr); +extern struct proto_hdr *proto_upper_header(struct proto_hdr *hdr); extern uint8_t *proto_header_ptr(struct proto_hdr *hdr); extern void proto_header_fields_add(struct proto_hdr *hdr, |