rcpc.h

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/* RCPC.H */

#ifndef _RCPC_H_
#define _RCPC_H_

#include "Buffer.h"

typedef struct {
  int sequence_number;  /* Number between 0 and 31 */
  int count;            /* How many blocks we have */
  int xmit_count;       /* How many times we have transmitted this info */
  byte *block[4];       /* the (at most 4) RCPC codes */
  int length;           /* the length of each block including CRC, TB */
} buf_rcpc;


/* Function Prototypes */

int max_arq(int rtype);
/*
 * returns the most arq's that can be sent for a given rate type rtype
 */

int inc_xmit_count(buf_rcpc *br);
/*
 * increments xmit count of br and returns it modulo 2
 */

buf_rcpc *find_rcpc(Buffer *rcpcs, int seq_num);
/*
 * Finds an rcpc buffer entry with a given timestamp
 * Returns a pointer to it if it exists, or NULL if it doesn't
 */

buf_rcpc *place_rcpc(Buffer *rcpcs, int seq_num, byte *data, int num_bytes,
                     int arq_type, int last_written, int *last_recd,
                     int old_threshold);
/*
 * Places a block of bytes in the correct rcpc structure, and returns
 *   a pointer to it.
 *   seq_num is the sequence number
 *   data is the byte array of data to put in the block
 *   num_bytes is the length of the byte array
 *   arq_type is the arq_type (1,2 or 3)
 *   last_written is the seq_num of last packet written out from buffer
 *   last_recd is seq_num of last new packet received
 */

#endif

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