diff options
| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2008-09-04 07:30:19 +0200 |
|---|---|---|
| committer | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2008-09-04 07:45:28 +0200 |
| commit | b9aaac1c538a9c86e8ef3be2579a13ff55580908 (patch) | |
| tree | 3647b3d93e22ad4fb4e31460bf81f4040a697d70 /net/dccp/feat.h | |
| parent | c8041e264b3db6944d37b87969fbe6458cb30cfd (diff) | |
dccp: Increase the scope of variable-length htonl/ntohl functions
This extends the scope of two available functions, encode|decode_value_var,
to work up to 6 (8) bytes, to match maximum requirements in the RFC.
These functions are going to be used both by general option processing and
feature negotiation code, hence declarations have been put into feat.h.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'net/dccp/feat.h')
| -rw-r--r-- | net/dccp/feat.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/net/dccp/feat.h b/net/dccp/feat.h index b53b11717c4..90d16caf545 100644 --- a/net/dccp/feat.h +++ b/net/dccp/feat.h @@ -124,4 +124,18 @@ extern int dccp_feat_clone(struct sock *oldsk, struct sock *newsk); extern int dccp_feat_clone_list(struct list_head const *, struct list_head *); extern int dccp_feat_init(struct sock *sk); +/* + * Encoding variable-length options and their maximum length. + * + * This affects NN options (SP options are all u8) and other variable-length + * options (see table 3 in RFC 4340). The limit is currently given the Sequence + * Window NN value (sec. 7.5.2) and the NDP count (sec. 7.7) option, all other + * options consume less than 6 bytes (timestamps are 4 bytes). + * When updating this constant (e.g. due to new internet drafts / RFCs), make + * sure that you also update all code which refers to it. + */ +#define DCCP_OPTVAL_MAXLEN 6 + +extern void dccp_encode_value_var(const u64 value, u8 *to, const u8 len); +extern u64 dccp_decode_value_var(const u8 *bf, const u8 len); #endif /* _DCCP_FEAT_H */ |