• Gerrit Renker's avatar
    dccp: Initialisation and type-checking of feature sysctls · 0a482267
    Gerrit Renker authored
    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: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
    Acked-by: default avatarIan McDonald <ian.mcdonald@jandi.co.nz>
    0a482267
sysctl.c 2.87 KB