Title: bf_align()


If data is not already packed and aligned, bf_align(acc, size, alignment) packs size (bf_align's second parameter) bytes from acc, bf_align()'s first parameter and a linked list of accessors (i.e., a packet), by calling bf_pack(). This packing is necessary to ensure that all of the fields from a header are easily accessed. For example, the ip code aligns a packet's header contained in the accessors before accessing the various ip header fields.

For a detailed description of the network service's buffer management, click here.