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| 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 07:45:32 +0200 |
| commit | 0a4822679d94e2b0117aeead06a19fad59533905 (patch) | |
| tree | a7df5bd77ba005e8b5a2f6be44929470d5916a74 /net/dccp/feat.h | |
| parent | 51c7d4fa2675c106a980ddcdbe308b54b5151945 (diff) | |
| download | op-kernel-dev-0a4822679d94e2b0117aeead06a19fad59533905.zip op-kernel-dev-0a4822679d94e2b0117aeead06a19fad59533905.tar.gz | |
dccp: Initialisation and type-checking of feature sysctls
This patch takes care of initialising and type-checking sysctls related to
feature negotiation. Type checking is important since some of the sysctls
now directly act on the feature-negotiation process.
The sysctls are initialised with the known default values for each feature.
For the type-checking the value constraints from RFC 4340 are used:
* Sequence Window uses the specified Wmin=32, the maximum is ulong (4 bytes),
tested and confirmed that it works up to 4294967295 - for Gbps speed;
* Ack Ratio is between 0 .. 0xffff (2-byte unsigned integer);
* CCIDs are between 0 .. 255;
* request_retries, retries1, retries2 also between 0..255 for good measure;
* tx_qlen is checked to be non-negative;
* sync_ratelimit remains as before.
Further changes:
----------------
Performed s@sysctl_dccp_feat@sysctl_dccp@g since the sysctls are now in feat.c.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Diffstat (limited to 'net/dccp/feat.h')
| -rw-r--r-- | net/dccp/feat.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/dccp/feat.h b/net/dccp/feat.h index f73b47a..f8456bc 100644 --- a/net/dccp/feat.h +++ b/net/dccp/feat.h @@ -99,6 +99,13 @@ struct ccid_dependency { u8 val; }; +/* + * Sysctls to seed defaults for feature negotiation + */ +extern unsigned long sysctl_dccp_sequence_window; +extern int sysctl_dccp_rx_ccid; +extern int sysctl_dccp_tx_ccid; + #ifdef CONFIG_IP_DCCP_DEBUG extern const char *dccp_feat_typename(const u8 type); extern const char *dccp_feat_name(const u8 feat); @@ -113,6 +120,7 @@ static inline void dccp_feat_debug(const u8 type, const u8 feat, const u8 val) #endif /* CONFIG_IP_DCCP_DEBUG */ extern int dccp_feat_init(struct sock *sk); +extern void dccp_feat_initialise_sysctls(void); extern int dccp_feat_register_sp(struct sock *sk, u8 feat, u8 is_local, u8 const *list, u8 len); extern int dccp_feat_register_nn(struct sock *sk, u8 feat, u64 val); |
