From 553a9c65beeb77072f08e4d8cd876b062dcdb193 Mon Sep 17 00:00:00 2001 From: Vadim Kochan Date: Sat, 13 Aug 2016 02:11:18 +0300 Subject: trafgen: udp: Update csum at runtime if needed Update UDP csum field at runtime if: 1) UDP field was changed. 2) IPv4/6 source/destination addresses were changed (which is a part of UDP pseudo header), this is handled by IPv4/6 protocols. Signed-off-by: Vadim Kochan Signed-off-by: Tobias Klauser --- trafgen_l3.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'trafgen_l3.c') diff --git a/trafgen_l3.c b/trafgen_l3.c index 9bb0de9..91052a0 100644 --- a/trafgen_l3.c +++ b/trafgen_l3.c @@ -46,6 +46,13 @@ static void ipv4_header_init(struct proto_hdr *hdr) static void ipv4_field_changed(struct proto_field *field) { field->hdr->is_csum_valid = false; + + if (field->id == IP4_SADDR || field->id == IP4_DADDR) { + struct proto_hdr *upper = proto_upper_header(field->hdr); + + if (upper && upper->ops->id == PROTO_UDP) + upper->is_csum_valid = false; + } } static void ipv4_csum_update(struct proto_hdr *hdr) @@ -136,6 +143,16 @@ static void ipv6_header_init(struct proto_hdr *hdr) proto_field_set_default_dev_ipv6(hdr, IP6_SADDR); } +static void ipv6_field_changed(struct proto_field *field) +{ + if (field->id == IP6_SADDR || field->id == IP6_DADDR) { + struct proto_hdr *upper = proto_upper_header(field->hdr); + + if (upper && upper->ops->id == PROTO_UDP) + upper->is_csum_valid = false; + } +} + #define IPV6_HDR_LEN 40 static void ipv6_packet_finish(struct proto_hdr *hdr) @@ -171,6 +188,7 @@ static const struct proto_ops ipv6_proto_ops = { .id = PROTO_IP6, .layer = PROTO_L3, .header_init = ipv6_header_init, + .field_changed = ipv6_field_changed, .packet_finish = ipv6_packet_finish, .set_next_proto = ipv6_set_next_proto, }; -- cgit v1.2.3-54-g00ecf