| slcompress.h (50477) | slcompress.h (58982) |
|---|---|
| 1/* 2 * Definitions for tcp compression routines. 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 20 unchanged lines hidden (view full) --- 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: 36 * - Initial distribution. | 1/* 2 * Definitions for tcp compression routines. 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 20 unchanged lines hidden (view full) --- 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: 36 * - Initial distribution. |
| 37 * $FreeBSD: head/sys/net/slcompress.h 50477 1999-08-28 01:08:13Z peter $ | 37 * $FreeBSD: head/sys/net/slcompress.h 58982 2000-04-03 19:54:33Z gj $ |
| 38 */ 39 40#ifndef _NET_SLCOMPRESS_H_ 41#define _NET_SLCOMPRESS_H_ 42 43#define MAX_STATES 16 /* must be > 2 and < 256 */ | 38 */ 39 40#ifndef _NET_SLCOMPRESS_H_ 41#define _NET_SLCOMPRESS_H_ 42 43#define MAX_STATES 16 /* must be > 2 and < 256 */ |
| 44#define MAX_HDR MLEN /* XXX 4bsd-ism: should really be 128 */ | 44#define MAX_HDR 128 |
| 45 46/* 47 * Compressed packet format: 48 * 49 * The first octet contains the packet type (top 3 bits), TCP 50 * 'push' bit, and flags that indicate which of the 4 TCP sequence 51 * numbers have changed (bottom 5 bits). The next octet is a 52 * conversation number that associates a saved IP/TCP header with --- 61 unchanged lines hidden (view full) --- 114 * we saw from the conversation together with a small identifier 115 * the transmit & receive ends of the line use to locate saved header. 116 */ 117struct cstate { 118 struct cstate *cs_next; /* next most recently used cstate (xmit only) */ 119 u_int16_t cs_hlen; /* size of hdr (receive only) */ 120 u_char cs_id; /* connection # associated with this state */ 121 u_char cs_filler; | 45 46/* 47 * Compressed packet format: 48 * 49 * The first octet contains the packet type (top 3 bits), TCP 50 * 'push' bit, and flags that indicate which of the 4 TCP sequence 51 * numbers have changed (bottom 5 bits). The next octet is a 52 * conversation number that associates a saved IP/TCP header with --- 61 unchanged lines hidden (view full) --- 114 * we saw from the conversation together with a small identifier 115 * the transmit & receive ends of the line use to locate saved header. 116 */ 117struct cstate { 118 struct cstate *cs_next; /* next most recently used cstate (xmit only) */ 119 u_int16_t cs_hlen; /* size of hdr (receive only) */ 120 u_char cs_id; /* connection # associated with this state */ 121 u_char cs_filler; |
| 122 union { 123 char csu_hdr[MAX_HDR]; 124 struct ip csu_ip; /* ip/tcp hdr from most recent packet */ 125 } slcs_u; | 122 struct ip cs_ip; /* ip/tcp hdr from most recent packet */ |
| 126}; | 123}; |
| 127#define cs_ip slcs_u.csu_ip 128#define cs_hdr slcs_u.csu_hdr | |
| 129 130/* 131 * all the state data for one serial line (we need one of these 132 * per line). 133 */ 134struct slcompress { 135 struct cstate *last_cs; /* most recently used tstate */ 136 u_char last_recv; /* last rcvd conn. id */ --- 26 unchanged lines hidden --- | 124 125/* 126 * all the state data for one serial line (we need one of these 127 * per line). 128 */ 129struct slcompress { 130 struct cstate *last_cs; /* most recently used tstate */ 131 u_char last_recv; /* last rcvd conn. id */ --- 26 unchanged lines hidden --- |