On Tue, Jan 06, 2015 at 09:49:06PM +0800, Yang Yannan wrote: > 〒_〒, help! I wanna know what ofpact_put_＊is, such as > ofpact_put_SET_VLAN_VID（）. is it a method or ？why there is not a definition > for it ? I search it in the all of code, and did not understand it. > > context is as follows: > after decoding ofp_action and getting a "code", use ofpact_put_＊（out） > according to the "code", like > ofpact_put_SET_VLAN_VID（out） ->vlan_vid=.....
See the comment in ofp-actions.h: /* For each OFPACT_<ENUM> with a corresponding struct <STRUCT>, this defines * the following commonly useful functions: * * struct <STRUCT> *ofpact_put_<ENUM>(struct ofpbuf *ofpacts); * * Appends a new 'ofpact', of length OFPACT_<ENUM>_RAW_SIZE, to 'ofpacts', * initializes it with ofpact_init_<ENUM>(), and returns it. Also sets * 'ofpacts->l2' to the returned action. * * After using this function to add a variable-length action, add the * elements of the flexible array (e.g. with ofpbuf_put()), then use * ofpact_update_len() to update the length embedded into the action. * (Keep in mind the need to refresh the structure from 'ofpacts->frame' * after adding data to 'ofpacts'.) * * struct <STRUCT> *ofpact_get_<ENUM>(const struct ofpact *ofpact); * * Returns 'ofpact' cast to "struct <STRUCT> *". 'ofpact->type' must be * OFPACT_<ENUM>. * * as well as the following more rarely useful definitions: * * void ofpact_init_<ENUM>(struct <STRUCT> *ofpact); * * Initializes the parts of 'ofpact' that identify it as having type * OFPACT_<ENUM> and length OFPACT_<ENUM>_RAW_SIZE and zeros the rest. * * <ENUM>_RAW_SIZE * * The size of the action structure. For a fixed-length action, this is * sizeof(struct <STRUCT>). For a variable-length action, this is the * offset to the variable-length part. * * <ENUM>_SIZE * * An integer constant, the value of OFPACT_<ENUM>_RAW_SIZE rounded up to a * multiple of OFPACT_ALIGNTO. */ _______________________________________________ discuss mailing list [email protected] http://openvswitch.org/mailman/listinfo/discuss
