extern u_char sl_compress_tcp(/* struct mbuf *, struct ip *,
struct slcompress *, int compress_cid_flag */);
extern int sl_uncompress_tcp(/* u_char **, int, u_char, struct slcompress * */);
extern u_char sl_compress_tcp(/* struct mbuf *, struct ip *,
struct slcompress *, int compress_cid_flag */);
extern int sl_uncompress_tcp(/* u_char **, int, u_char, struct slcompress * */);