Production Specification

07/03/02

B roa dcom Co rpo rat ion

Document

5802-DS03-405-R

Memory Structures

} PktCtxBuf;

/* Master command record */

typedef struct MasterCmd_struct {

u16 numPkt; /* Number of Packets in this MCR*/

u16 flags; /* Completion and error status from chip, per MCR */

/* flags[0] = 1 if processing of the MCR is finished

0 otherwise

flags[1] = 1 if an error occurred

0 if no error occurred

flags[7:2]: reserved

flags[15:8] = error code if an error occurred (i.e. flags[1] == 1),

undefined otherwise*/

/* Following 5 fields occur once per packet in the MCR */

uint firstPktCMDAddr;

DataBufChain firstPktData; /* First descriptor for input packet data */

u16 reserved; /* Includes per packet done status */

u16 pktLength;

DataBufChain firstOutputData; /* First descriptor for output packet data */

/* Followed by as many sets of above 5 fields as there

are packets in this MCR */

} MasterCmd;

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An implicit (pre-computed) IV is never used as part of the HMAC computation

always part of the authentication computation. Further details regarding IV material handling follow the pictorial illustration

of the packet context structure.

The following is the data structure (.h file) for key setup processing.