slcompress.c File Reference

#include <stdint.h>
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <net/slcompress.h>

Include dependency graph for slcompress.c:

Macros
#define	INCR(counter)   ++comp->counter;
#define	BCMP(p1, p2, n)   bcmp((void *)(p1), (void *)(p2), (int)(n))
#define	BCOPY(p1, p2, n)   bcopy((void *)(p1), (void *)(p2), (int)(n))
#define	ENCODE(n)
#define	ENCODEZ(n)
#define	DECODEL(f)
#define	DECODES(f)
#define	DECODEU(f)

Functions
void	sl_compress_init (struct slcompress *comp, int max_state)
u_int	sl_compress_tcp (struct mbuf *m, struct ip *ip, struct slcompress *comp, int compress_cid)
int	sl_uncompress_tcp (u_char **bufp, int len, u_int type, struct slcompress *comp)
int	sl_uncompress_tcp_core (u_char *buf, int buflen, int total_len, u_int type, struct slcompress *comp, u_char **hdrp, u_int *hlenp)

Macro Definition Documentation

DECODEL

#define DECODEL

(

f

)

Value:

{ \
        if (*cp == 0) {\
                (f) = htonl(ntohl(f) + ((cp[1] << 8) | cp[2])); \
                cp += 3; \
        } else { \
                (f) = htonl(ntohl(f) + (u_int32_t)*cp++); \
        } \
}

DECODES

#define DECODES

(

f

)

Value:

{ \
        if (*cp == 0) {\
                (f) = htons(ntohs(f) + ((cp[1] << 8) | cp[2])); \
                cp += 3; \
        } else { \
                (f) = htons(ntohs(f) + (u_int32_t)*cp++); \
        } \
}

DECODEU

#define DECODEU

(

f

)

Value:

{ \
        if (*cp == 0) {\
                (f) = htons((cp[1] << 8) | cp[2]); \
                cp += 3; \
        } else { \
                (f) = htons((u_int32_t)*cp++); \
        } \
}

ENCODE

#define ENCODE

(

n

)

Value:

{ \
        if ((u_int16_t)(n) >= 256) { \
                *cp++ = 0; \
                cp[1] = (n); \
                cp[0] = (n) >> 8; \
                cp += 2; \
        } else { \
                *cp++ = (n); \
        } \
}

ENCODEZ

#define ENCODEZ

(

n

)

Value:

{ \
        if ((u_int16_t)(n) >= 256 || (u_int16_t)(n) == 0) { \
                *cp++ = 0; \
                cp[1] = (n); \
                cp[0] = (n) >> 8; \
                cp += 2; \
        } else { \
                *cp++ = (n); \
        } \
}