diff options
| author | Vadim Kochan <vadim4j@gmail.com> | 2016-12-18 11:52:49 +0200 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-12-21 16:57:53 +0100 |
| commit | 647b7b76d63f8c847b17495e6ad24dc3b256899f (patch) | |
| tree | 4d4d488a0f65118cdaf45f381277408b9797364a /trafgen_proto.h | |
| parent | 44e97b2009dc2bee93f25684b274f458f50ea667 (diff) | |
trafgen: parser: Allow to set function at field offset
Extend proto field expression to:
proto_field[{index}:{len}] = {func}
which allows to specify function on the field offset via index
and value length (default is 1 - 1 byte). This rule is optional.
It was needed to keep of proto_field's copies in packet_dyn->fields
instead of original fields which allows to scpecify different functions
on the different parts of same field, also the copy of original
proto_field allows to set custom length/pkt_offset which makes such
field behave as virtual sub-field of the original one with different
length/pkt_offset but point to the same piece of header.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'trafgen_proto.h')
| -rw-r--r-- | trafgen_proto.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/trafgen_proto.h b/trafgen_proto.h index d4427e6..29d68db 100644 --- a/trafgen_proto.h +++ b/trafgen_proto.h @@ -66,7 +66,9 @@ struct proto_field_func { uint32_t min; uint32_t max; int32_t inc; + uint16_t offset; uint32_t val; + size_t len; void (*update_field)(struct proto_field *field); }; @@ -142,9 +144,6 @@ extern void proto_hdr_field_set_default_dev_ipv6(struct proto_hdr *hdr, uint32_t extern void proto_field_dyn_apply(struct proto_field *field); -extern void proto_hdr_field_func_add(struct proto_hdr *hdr, uint32_t fid, - struct proto_field_func *func); - extern struct proto_field *proto_hdr_field_by_id(struct proto_hdr *hdr, uint32_t fid); @@ -157,4 +156,7 @@ extern uint32_t proto_field_get_u32(struct proto_field *field); extern void proto_field_set_be16(struct proto_field *field, uint16_t val); extern void proto_field_set_be32(struct proto_field *field, uint32_t val); +extern void proto_field_func_add(struct proto_field *field, + struct proto_field_func *func); + #endif /* TRAFGEN_PROTO_H */ |