Shinichiro Nakamura / Mbed 2 deprecated Toragi_2012_PachubeCosm

Hi. This is the feed program for Cosm. (The previous name of the services is Pachube.)

Dependencies:   mbed ThermistorPack Pachube ConfigFile EthernetNetIf TextLCD HTTPClient_ToBeRemoved FatFileSystem SDFileSystem

extlib/EthernetNetIf/LPC1768/lwip/netif/ppp/vj.h@0:521ba375aa0f, 2012-08-06 (annotated)

Committer:
shintamainjp
Date:
Mon Aug 06 12:37:59 2012 +0000
Revision:
0:521ba375aa0f
Pachube renamed to Cosm.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shintamainjp 0:521ba375aa0f 1 /*
shintamainjp 0:521ba375aa0f 2 * Definitions for tcp compression routines.
shintamainjp 0:521ba375aa0f 3 *
shintamainjp 0:521ba375aa0f 4 * $Id: vj.h,v 1.7 2010/02/22 17:52:09 goldsimon Exp $
shintamainjp 0:521ba375aa0f 5 *
shintamainjp 0:521ba375aa0f 6 * Copyright (c) 1989 Regents of the University of California.
shintamainjp 0:521ba375aa0f 7 * All rights reserved.
shintamainjp 0:521ba375aa0f 8 *
shintamainjp 0:521ba375aa0f 9 * Redistribution and use in source and binary forms are permitted
shintamainjp 0:521ba375aa0f 10 * provided that the above copyright notice and this paragraph are
shintamainjp 0:521ba375aa0f 11 * duplicated in all such forms and that any documentation,
shintamainjp 0:521ba375aa0f 12 * advertising materials, and other materials related to such
shintamainjp 0:521ba375aa0f 13 * distribution and use acknowledge that the software was developed
shintamainjp 0:521ba375aa0f 14 * by the University of California, Berkeley. The name of the
shintamainjp 0:521ba375aa0f 15 * University may not be used to endorse or promote products derived
shintamainjp 0:521ba375aa0f 16 * from this software without specific prior written permission.
shintamainjp 0:521ba375aa0f 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
shintamainjp 0:521ba375aa0f 18 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
shintamainjp 0:521ba375aa0f 19 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
shintamainjp 0:521ba375aa0f 20 *
shintamainjp 0:521ba375aa0f 21 * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989:
shintamainjp 0:521ba375aa0f 22 * - Initial distribution.
shintamainjp 0:521ba375aa0f 23 */
shintamainjp 0:521ba375aa0f 24
shintamainjp 0:521ba375aa0f 25 #ifndef VJ_H
shintamainjp 0:521ba375aa0f 26 #define VJ_H
shintamainjp 0:521ba375aa0f 27
shintamainjp 0:521ba375aa0f 28 #include "lwip/ip.h"
shintamainjp 0:521ba375aa0f 29 #include "lwip/tcp_impl.h"
shintamainjp 0:521ba375aa0f 30
shintamainjp 0:521ba375aa0f 31 #define MAX_SLOTS 16 /* must be > 2 and < 256 */
shintamainjp 0:521ba375aa0f 32 #define MAX_HDR 128
shintamainjp 0:521ba375aa0f 33
shintamainjp 0:521ba375aa0f 34 /*
shintamainjp 0:521ba375aa0f 35 * Compressed packet format:
shintamainjp 0:521ba375aa0f 36 *
shintamainjp 0:521ba375aa0f 37 * The first octet contains the packet type (top 3 bits), TCP
shintamainjp 0:521ba375aa0f 38 * 'push' bit, and flags that indicate which of the 4 TCP sequence
shintamainjp 0:521ba375aa0f 39 * numbers have changed (bottom 5 bits). The next octet is a
shintamainjp 0:521ba375aa0f 40 * conversation number that associates a saved IP/TCP header with
shintamainjp 0:521ba375aa0f 41 * the compressed packet. The next two octets are the TCP checksum
shintamainjp 0:521ba375aa0f 42 * from the original datagram. The next 0 to 15 octets are
shintamainjp 0:521ba375aa0f 43 * sequence number changes, one change per bit set in the header
shintamainjp 0:521ba375aa0f 44 * (there may be no changes and there are two special cases where
shintamainjp 0:521ba375aa0f 45 * the receiver implicitly knows what changed -- see below).
shintamainjp 0:521ba375aa0f 46 *
shintamainjp 0:521ba375aa0f 47 * There are 5 numbers which can change (they are always inserted
shintamainjp 0:521ba375aa0f 48 * in the following order): TCP urgent pointer, window,
shintamainjp 0:521ba375aa0f 49 * acknowlegement, sequence number and IP ID. (The urgent pointer
shintamainjp 0:521ba375aa0f 50 * is different from the others in that its value is sent, not the
shintamainjp 0:521ba375aa0f 51 * change in value.) Since typical use of SLIP links is biased
shintamainjp 0:521ba375aa0f 52 * toward small packets (see comments on MTU/MSS below), changes
shintamainjp 0:521ba375aa0f 53 * use a variable length coding with one octet for numbers in the
shintamainjp 0:521ba375aa0f 54 * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the
shintamainjp 0:521ba375aa0f 55 * range 256 - 65535 or 0. (If the change in sequence number or
shintamainjp 0:521ba375aa0f 56 * ack is more than 65535, an uncompressed packet is sent.)
shintamainjp 0:521ba375aa0f 57 */
shintamainjp 0:521ba375aa0f 58
shintamainjp 0:521ba375aa0f 59 /*
shintamainjp 0:521ba375aa0f 60 * Packet types (must not conflict with IP protocol version)
shintamainjp 0:521ba375aa0f 61 *
shintamainjp 0:521ba375aa0f 62 * The top nibble of the first octet is the packet type. There are
shintamainjp 0:521ba375aa0f 63 * three possible types: IP (not proto TCP or tcp with one of the
shintamainjp 0:521ba375aa0f 64 * control flags set); uncompressed TCP (a normal IP/TCP packet but
shintamainjp 0:521ba375aa0f 65 * with the 8-bit protocol field replaced by an 8-bit connection id --
shintamainjp 0:521ba375aa0f 66 * this type of packet syncs the sender & receiver); and compressed
shintamainjp 0:521ba375aa0f 67 * TCP (described above).
shintamainjp 0:521ba375aa0f 68 *
shintamainjp 0:521ba375aa0f 69 * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and
shintamainjp 0:521ba375aa0f 70 * is logically part of the 4-bit "changes" field that follows. Top
shintamainjp 0:521ba375aa0f 71 * three bits are actual packet type. For backward compatibility
shintamainjp 0:521ba375aa0f 72 * and in the interest of conserving bits, numbers are chosen so the
shintamainjp 0:521ba375aa0f 73 * IP protocol version number (4) which normally appears in this nibble
shintamainjp 0:521ba375aa0f 74 * means "IP packet".
shintamainjp 0:521ba375aa0f 75 */
shintamainjp 0:521ba375aa0f 76
shintamainjp 0:521ba375aa0f 77 /* packet types */
shintamainjp 0:521ba375aa0f 78 #define TYPE_IP 0x40
shintamainjp 0:521ba375aa0f 79 #define TYPE_UNCOMPRESSED_TCP 0x70
shintamainjp 0:521ba375aa0f 80 #define TYPE_COMPRESSED_TCP 0x80
shintamainjp 0:521ba375aa0f 81 #define TYPE_ERROR 0x00
shintamainjp 0:521ba375aa0f 82
shintamainjp 0:521ba375aa0f 83 /* Bits in first octet of compressed packet */
shintamainjp 0:521ba375aa0f 84 #define NEW_C 0x40 /* flag bits for what changed in a packet */
shintamainjp 0:521ba375aa0f 85 #define NEW_I 0x20
shintamainjp 0:521ba375aa0f 86 #define NEW_S 0x08
shintamainjp 0:521ba375aa0f 87 #define NEW_A 0x04
shintamainjp 0:521ba375aa0f 88 #define NEW_W 0x02
shintamainjp 0:521ba375aa0f 89 #define NEW_U 0x01
shintamainjp 0:521ba375aa0f 90
shintamainjp 0:521ba375aa0f 91 /* reserved, special-case values of above */
shintamainjp 0:521ba375aa0f 92 #define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */
shintamainjp 0:521ba375aa0f 93 #define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */
shintamainjp 0:521ba375aa0f 94 #define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U)
shintamainjp 0:521ba375aa0f 95
shintamainjp 0:521ba375aa0f 96 #define TCP_PUSH_BIT 0x10
shintamainjp 0:521ba375aa0f 97
shintamainjp 0:521ba375aa0f 98
shintamainjp 0:521ba375aa0f 99 /*
shintamainjp 0:521ba375aa0f 100 * "state" data for each active tcp conversation on the wire. This is
shintamainjp 0:521ba375aa0f 101 * basically a copy of the entire IP/TCP header from the last packet
shintamainjp 0:521ba375aa0f 102 * we saw from the conversation together with a small identifier
shintamainjp 0:521ba375aa0f 103 * the transmit & receive ends of the line use to locate saved header.
shintamainjp 0:521ba375aa0f 104 */
shintamainjp 0:521ba375aa0f 105 struct cstate {
shintamainjp 0:521ba375aa0f 106 struct cstate *cs_next; /* next most recently used state (xmit only) */
shintamainjp 0:521ba375aa0f 107 u_short cs_hlen; /* size of hdr (receive only) */
shintamainjp 0:521ba375aa0f 108 u_char cs_id; /* connection # associated with this state */
shintamainjp 0:521ba375aa0f 109 u_char cs_filler;
shintamainjp 0:521ba375aa0f 110 union {
shintamainjp 0:521ba375aa0f 111 char csu_hdr[MAX_HDR];
shintamainjp 0:521ba375aa0f 112 struct ip_hdr csu_ip; /* ip/tcp hdr from most recent packet */
shintamainjp 0:521ba375aa0f 113 } vjcs_u;
shintamainjp 0:521ba375aa0f 114 };
shintamainjp 0:521ba375aa0f 115 #define cs_ip vjcs_u.csu_ip
shintamainjp 0:521ba375aa0f 116 #define cs_hdr vjcs_u.csu_hdr
shintamainjp 0:521ba375aa0f 117
shintamainjp 0:521ba375aa0f 118
shintamainjp 0:521ba375aa0f 119 struct vjstat {
shintamainjp 0:521ba375aa0f 120 unsigned long vjs_packets; /* outbound packets */
shintamainjp 0:521ba375aa0f 121 unsigned long vjs_compressed; /* outbound compressed packets */
shintamainjp 0:521ba375aa0f 122 unsigned long vjs_searches; /* searches for connection state */
shintamainjp 0:521ba375aa0f 123 unsigned long vjs_misses; /* times couldn't find conn. state */
shintamainjp 0:521ba375aa0f 124 unsigned long vjs_uncompressedin; /* inbound uncompressed packets */
shintamainjp 0:521ba375aa0f 125 unsigned long vjs_compressedin; /* inbound compressed packets */
shintamainjp 0:521ba375aa0f 126 unsigned long vjs_errorin; /* inbound unknown type packets */
shintamainjp 0:521ba375aa0f 127 unsigned long vjs_tossed; /* inbound packets tossed because of error */
shintamainjp 0:521ba375aa0f 128 };
shintamainjp 0:521ba375aa0f 129
shintamainjp 0:521ba375aa0f 130 /*
shintamainjp 0:521ba375aa0f 131 * all the state data for one serial line (we need one of these per line).
shintamainjp 0:521ba375aa0f 132 */
shintamainjp 0:521ba375aa0f 133 struct vjcompress {
shintamainjp 0:521ba375aa0f 134 struct cstate *last_cs; /* most recently used tstate */
shintamainjp 0:521ba375aa0f 135 u_char last_recv; /* last rcvd conn. id */
shintamainjp 0:521ba375aa0f 136 u_char last_xmit; /* last sent conn. id */
shintamainjp 0:521ba375aa0f 137 u_short flags;
shintamainjp 0:521ba375aa0f 138 u_char maxSlotIndex;
shintamainjp 0:521ba375aa0f 139 u_char compressSlot; /* Flag indicating OK to compress slot ID. */
shintamainjp 0:521ba375aa0f 140 #if LINK_STATS
shintamainjp 0:521ba375aa0f 141 struct vjstat stats;
shintamainjp 0:521ba375aa0f 142 #endif
shintamainjp 0:521ba375aa0f 143 struct cstate tstate[MAX_SLOTS]; /* xmit connection states */
shintamainjp 0:521ba375aa0f 144 struct cstate rstate[MAX_SLOTS]; /* receive connection states */
shintamainjp 0:521ba375aa0f 145 };
shintamainjp 0:521ba375aa0f 146
shintamainjp 0:521ba375aa0f 147 /* flag values */
shintamainjp 0:521ba375aa0f 148 #define VJF_TOSS 1U /* tossing rcvd frames because of input err */
shintamainjp 0:521ba375aa0f 149
shintamainjp 0:521ba375aa0f 150 extern void vj_compress_init (struct vjcompress *comp);
shintamainjp 0:521ba375aa0f 151 extern u_int vj_compress_tcp (struct vjcompress *comp, struct pbuf *pb);
shintamainjp 0:521ba375aa0f 152 extern void vj_uncompress_err (struct vjcompress *comp);
shintamainjp 0:521ba375aa0f 153 extern int vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp);
shintamainjp 0:521ba375aa0f 154 extern int vj_uncompress_tcp (struct pbuf **nb, struct vjcompress *comp);
shintamainjp 0:521ba375aa0f 155
shintamainjp 0:521ba375aa0f 156 #endif /* VJ_H */