diff options
| author | Vadim Kochan <vadim4j@gmail.com> | 2016-08-13 02:11:18 +0300 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-09-21 09:56:55 +0200 |
| commit | 553a9c65beeb77072f08e4d8cd876b062dcdb193 (patch) | |
| tree | bfd6b45eb220a1dc0168ff879780667a58bfd2b8 /trafgen_l3.c | |
| parent | 88169061a70a2363f503f14e686e2b070e6e63ef (diff) | |
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 <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'trafgen_l3.c')
| -rw-r--r-- | trafgen_l3.c | 18 |
1 files changed, 18 insertions, 0 deletions
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, }; |