Em Wed, Sep 24, 2008 at 07:23:05AM +0200, Gerrit Renker escreveu: > This is the second/other revised patch for this set [v2 of 1/5]. > > Changes relative to v1: copied Arnaldos suggested layout and updated the > struct documentation accordingly. Compile-tested the result. > > >>>>>>>>>>>>>>>>>>>>>>>>> Patch v2 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< > dccp: Basic data structure for feature negotiation > > This patch prepares for the new and extended feature-negotiation routines. > > The following feature-negotiation data structures are provided: > * a container for the various (SP or NN) values, > * symbolic state names to track feature states, > * an entry struct which holds all current information together, > * elementary functions to fill in and process these structures. > > Entry structs are arranged as FIFO for the following reason: RFC 4340 specifies > that if multiple options of the same type are present, they are processed in the > order of their appearance in the packet; which means that this order needs to be > preserved in the local data structure (the later insertion code also respects > this order). > > The struct list_head has been chosen for the following reasons: the most > frequent operations are > * add new entry at tail (when receiving Change or setting socket options); > * delete entry (when Confirm has been received); > * deep copy of entire list (cloning from listening socket onto request socket). > > The NN value has been set to 64 bit, which is a currently sufficient upper limit > (Sequence Window feature has 48 bit). > > Thanks to Arnaldo who streamlined the field layout of the entry struct. > > Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx> Acked-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
