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[DCCP]: Add Support for Data 1 .. 3 fields of Reset packets

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This adds fields to support the informational Data 1..3 fields of the
DCCP-Reset packets (RFC 4340, 5.6), and makes minor cosmetic changes
to documentation.
Code which fills in these fields follows in subsequent patches, it is
primarily used for reporting option-processing and feature-negotiation
errors.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
This commit is contained in:
Gerrit Renker
2007-09-26 11:27:56 -03:00
committed by David S. Miller
parent 727ecc5faa
commit 0430ee3451
2 changed files with 19 additions and 9 deletions
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14
net/dccp/dccp.h
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@@ -308,10 +308,22 @@ static inline int dccp_bad_service_code(const struct sock *sk,
return !dccp_list_has_service(dp->dccps_service_list, service);
}
/**
* dccp_skb_cb - DCCP per-packet control information
* @dccpd_type: one of %dccp_pkt_type (or unknown)
* @dccpd_ccval: CCVal field (5.1), see e.g. RFC 4342, 8.1
* @dccpd_reset_code: one of %dccp_reset_codes
* @dccpd_reset_data: Data1..3 fields (depend on @dccpd_reset_code)
* @dccpd_opt_len: total length of all options (5.8) in the packet
* @dccpd_seq: sequence number
* @dccpd_ack_seq: acknowledgment number subheader field value
* This is used for transmission as well as for reception.
*/
struct dccp_skb_cb {
__u8 dccpd_type:4;
__u8 dccpd_ccval:4;
__u8 dccpd_reset_code;
__u8 dccpd_reset_code,
dccpd_reset_data[3];
__u16 dccpd_opt_len;
__u64 dccpd_seq;
__u64 dccpd_ack_seq;