Derek Cheung / Mbed 2 deprecated NTP_LED_CLOCK

Read NTP time from Ethernet and drive six 7-segment LEDs using a MAX7221 to show time, date, month, week, year etc....

Dependencies:   NTPClient_NetServices mbed

LPC1768/lwip/netif/ppp/vj.h@0:e083abcfe7a8, 2011-06-22 (annotated)

Committer:
cheungderek
Date:
Wed Jun 22 01:31:47 2011 +0000
Revision:
0:e083abcfe7a8
First release.

Just some testing but working code to read NTP time and drive 6 LEDs to display time, date, month, year etc...

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cheungderek 0:e083abcfe7a8 1 /*
cheungderek 0:e083abcfe7a8 2 * Definitions for tcp compression routines.
cheungderek 0:e083abcfe7a8 3 *
cheungderek 0:e083abcfe7a8 4 * $Id: vj.h,v 1.7 2010/02/22 17:52:09 goldsimon Exp $
cheungderek 0:e083abcfe7a8 5 *
cheungderek 0:e083abcfe7a8 6 * Copyright (c) 1989 Regents of the University of California.
cheungderek 0:e083abcfe7a8 7 * All rights reserved.
cheungderek 0:e083abcfe7a8 8 *
cheungderek 0:e083abcfe7a8 9 * Redistribution and use in source and binary forms are permitted
cheungderek 0:e083abcfe7a8 10 * provided that the above copyright notice and this paragraph are
cheungderek 0:e083abcfe7a8 11 * duplicated in all such forms and that any documentation,
cheungderek 0:e083abcfe7a8 12 * advertising materials, and other materials related to such
cheungderek 0:e083abcfe7a8 13 * distribution and use acknowledge that the software was developed
cheungderek 0:e083abcfe7a8 14 * by the University of California, Berkeley. The name of the
cheungderek 0:e083abcfe7a8 15 * University may not be used to endorse or promote products derived
cheungderek 0:e083abcfe7a8 16 * from this software without specific prior written permission.
cheungderek 0:e083abcfe7a8 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
cheungderek 0:e083abcfe7a8 18 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
cheungderek 0:e083abcfe7a8 19 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
cheungderek 0:e083abcfe7a8 20 *
cheungderek 0:e083abcfe7a8 21 * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989:
cheungderek 0:e083abcfe7a8 22 * - Initial distribution.
cheungderek 0:e083abcfe7a8 23 */
cheungderek 0:e083abcfe7a8 24
cheungderek 0:e083abcfe7a8 25 #ifndef VJ_H
cheungderek 0:e083abcfe7a8 26 #define VJ_H
cheungderek 0:e083abcfe7a8 27
cheungderek 0:e083abcfe7a8 28 #include "lwip/ip.h"
cheungderek 0:e083abcfe7a8 29 #include "lwip/tcp_impl.h"
cheungderek 0:e083abcfe7a8 30
cheungderek 0:e083abcfe7a8 31 #define MAX_SLOTS 16 /* must be > 2 and < 256 */
cheungderek 0:e083abcfe7a8 32 #define MAX_HDR 128
cheungderek 0:e083abcfe7a8 33
cheungderek 0:e083abcfe7a8 34 /*
cheungderek 0:e083abcfe7a8 35 * Compressed packet format:
cheungderek 0:e083abcfe7a8 36 *
cheungderek 0:e083abcfe7a8 37 * The first octet contains the packet type (top 3 bits), TCP
cheungderek 0:e083abcfe7a8 38 * 'push' bit, and flags that indicate which of the 4 TCP sequence
cheungderek 0:e083abcfe7a8 39 * numbers have changed (bottom 5 bits). The next octet is a
cheungderek 0:e083abcfe7a8 40 * conversation number that associates a saved IP/TCP header with
cheungderek 0:e083abcfe7a8 41 * the compressed packet. The next two octets are the TCP checksum
cheungderek 0:e083abcfe7a8 42 * from the original datagram. The next 0 to 15 octets are
cheungderek 0:e083abcfe7a8 43 * sequence number changes, one change per bit set in the header
cheungderek 0:e083abcfe7a8 44 * (there may be no changes and there are two special cases where
cheungderek 0:e083abcfe7a8 45 * the receiver implicitly knows what changed -- see below).
cheungderek 0:e083abcfe7a8 46 *
cheungderek 0:e083abcfe7a8 47 * There are 5 numbers which can change (they are always inserted
cheungderek 0:e083abcfe7a8 48 * in the following order): TCP urgent pointer, window,
cheungderek 0:e083abcfe7a8 49 * acknowlegement, sequence number and IP ID. (The urgent pointer
cheungderek 0:e083abcfe7a8 50 * is different from the others in that its value is sent, not the
cheungderek 0:e083abcfe7a8 51 * change in value.) Since typical use of SLIP links is biased
cheungderek 0:e083abcfe7a8 52 * toward small packets (see comments on MTU/MSS below), changes
cheungderek 0:e083abcfe7a8 53 * use a variable length coding with one octet for numbers in the
cheungderek 0:e083abcfe7a8 54 * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the
cheungderek 0:e083abcfe7a8 55 * range 256 - 65535 or 0. (If the change in sequence number or
cheungderek 0:e083abcfe7a8 56 * ack is more than 65535, an uncompressed packet is sent.)
cheungderek 0:e083abcfe7a8 57 */
cheungderek 0:e083abcfe7a8 58
cheungderek 0:e083abcfe7a8 59 /*
cheungderek 0:e083abcfe7a8 60 * Packet types (must not conflict with IP protocol version)
cheungderek 0:e083abcfe7a8 61 *
cheungderek 0:e083abcfe7a8 62 * The top nibble of the first octet is the packet type. There are
cheungderek 0:e083abcfe7a8 63 * three possible types: IP (not proto TCP or tcp with one of the
cheungderek 0:e083abcfe7a8 64 * control flags set); uncompressed TCP (a normal IP/TCP packet but
cheungderek 0:e083abcfe7a8 65 * with the 8-bit protocol field replaced by an 8-bit connection id --
cheungderek 0:e083abcfe7a8 66 * this type of packet syncs the sender & receiver); and compressed
cheungderek 0:e083abcfe7a8 67 * TCP (described above).
cheungderek 0:e083abcfe7a8 68 *
cheungderek 0:e083abcfe7a8 69 * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and
cheungderek 0:e083abcfe7a8 70 * is logically part of the 4-bit "changes" field that follows. Top
cheungderek 0:e083abcfe7a8 71 * three bits are actual packet type. For backward compatibility
cheungderek 0:e083abcfe7a8 72 * and in the interest of conserving bits, numbers are chosen so the
cheungderek 0:e083abcfe7a8 73 * IP protocol version number (4) which normally appears in this nibble
cheungderek 0:e083abcfe7a8 74 * means "IP packet".
cheungderek 0:e083abcfe7a8 75 */
cheungderek 0:e083abcfe7a8 76
cheungderek 0:e083abcfe7a8 77 /* packet types */
cheungderek 0:e083abcfe7a8 78 #define TYPE_IP 0x40
cheungderek 0:e083abcfe7a8 79 #define TYPE_UNCOMPRESSED_TCP 0x70
cheungderek 0:e083abcfe7a8 80 #define TYPE_COMPRESSED_TCP 0x80
cheungderek 0:e083abcfe7a8 81 #define TYPE_ERROR 0x00
cheungderek 0:e083abcfe7a8 82
cheungderek 0:e083abcfe7a8 83 /* Bits in first octet of compressed packet */
cheungderek 0:e083abcfe7a8 84 #define NEW_C 0x40 /* flag bits for what changed in a packet */
cheungderek 0:e083abcfe7a8 85 #define NEW_I 0x20
cheungderek 0:e083abcfe7a8 86 #define NEW_S 0x08
cheungderek 0:e083abcfe7a8 87 #define NEW_A 0x04
cheungderek 0:e083abcfe7a8 88 #define NEW_W 0x02
cheungderek 0:e083abcfe7a8 89 #define NEW_U 0x01
cheungderek 0:e083abcfe7a8 90
cheungderek 0:e083abcfe7a8 91 /* reserved, special-case values of above */
cheungderek 0:e083abcfe7a8 92 #define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */
cheungderek 0:e083abcfe7a8 93 #define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */
cheungderek 0:e083abcfe7a8 94 #define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U)
cheungderek 0:e083abcfe7a8 95
cheungderek 0:e083abcfe7a8 96 #define TCP_PUSH_BIT 0x10
cheungderek 0:e083abcfe7a8 97
cheungderek 0:e083abcfe7a8 98
cheungderek 0:e083abcfe7a8 99 /*
cheungderek 0:e083abcfe7a8 100 * "state" data for each active tcp conversation on the wire. This is
cheungderek 0:e083abcfe7a8 101 * basically a copy of the entire IP/TCP header from the last packet
cheungderek 0:e083abcfe7a8 102 * we saw from the conversation together with a small identifier
cheungderek 0:e083abcfe7a8 103 * the transmit & receive ends of the line use to locate saved header.
cheungderek 0:e083abcfe7a8 104 */
cheungderek 0:e083abcfe7a8 105 struct cstate {
cheungderek 0:e083abcfe7a8 106 struct cstate *cs_next; /* next most recently used state (xmit only) */
cheungderek 0:e083abcfe7a8 107 u_short cs_hlen; /* size of hdr (receive only) */
cheungderek 0:e083abcfe7a8 108 u_char cs_id; /* connection # associated with this state */
cheungderek 0:e083abcfe7a8 109 u_char cs_filler;
cheungderek 0:e083abcfe7a8 110 union {
cheungderek 0:e083abcfe7a8 111 char csu_hdr[MAX_HDR];
cheungderek 0:e083abcfe7a8 112 struct ip_hdr csu_ip; /* ip/tcp hdr from most recent packet */
cheungderek 0:e083abcfe7a8 113 } vjcs_u;
cheungderek 0:e083abcfe7a8 114 };
cheungderek 0:e083abcfe7a8 115 #define cs_ip vjcs_u.csu_ip
cheungderek 0:e083abcfe7a8 116 #define cs_hdr vjcs_u.csu_hdr
cheungderek 0:e083abcfe7a8 117
cheungderek 0:e083abcfe7a8 118
cheungderek 0:e083abcfe7a8 119 struct vjstat {
cheungderek 0:e083abcfe7a8 120 unsigned long vjs_packets; /* outbound packets */
cheungderek 0:e083abcfe7a8 121 unsigned long vjs_compressed; /* outbound compressed packets */
cheungderek 0:e083abcfe7a8 122 unsigned long vjs_searches; /* searches for connection state */
cheungderek 0:e083abcfe7a8 123 unsigned long vjs_misses; /* times couldn't find conn. state */
cheungderek 0:e083abcfe7a8 124 unsigned long vjs_uncompressedin; /* inbound uncompressed packets */
cheungderek 0:e083abcfe7a8 125 unsigned long vjs_compressedin; /* inbound compressed packets */
cheungderek 0:e083abcfe7a8 126 unsigned long vjs_errorin; /* inbound unknown type packets */
cheungderek 0:e083abcfe7a8 127 unsigned long vjs_tossed; /* inbound packets tossed because of error */
cheungderek 0:e083abcfe7a8 128 };
cheungderek 0:e083abcfe7a8 129
cheungderek 0:e083abcfe7a8 130 /*
cheungderek 0:e083abcfe7a8 131 * all the state data for one serial line (we need one of these per line).
cheungderek 0:e083abcfe7a8 132 */
cheungderek 0:e083abcfe7a8 133 struct vjcompress {
cheungderek 0:e083abcfe7a8 134 struct cstate *last_cs; /* most recently used tstate */
cheungderek 0:e083abcfe7a8 135 u_char last_recv; /* last rcvd conn. id */
cheungderek 0:e083abcfe7a8 136 u_char last_xmit; /* last sent conn. id */
cheungderek 0:e083abcfe7a8 137 u_short flags;
cheungderek 0:e083abcfe7a8 138 u_char maxSlotIndex;
cheungderek 0:e083abcfe7a8 139 u_char compressSlot; /* Flag indicating OK to compress slot ID. */
cheungderek 0:e083abcfe7a8 140 #if LINK_STATS
cheungderek 0:e083abcfe7a8 141 struct vjstat stats;
cheungderek 0:e083abcfe7a8 142 #endif
cheungderek 0:e083abcfe7a8 143 struct cstate tstate[MAX_SLOTS]; /* xmit connection states */
cheungderek 0:e083abcfe7a8 144 struct cstate rstate[MAX_SLOTS]; /* receive connection states */
cheungderek 0:e083abcfe7a8 145 };
cheungderek 0:e083abcfe7a8 146
cheungderek 0:e083abcfe7a8 147 /* flag values */
cheungderek 0:e083abcfe7a8 148 #define VJF_TOSS 1U /* tossing rcvd frames because of input err */
cheungderek 0:e083abcfe7a8 149
cheungderek 0:e083abcfe7a8 150 extern void vj_compress_init (struct vjcompress *comp);
cheungderek 0:e083abcfe7a8 151 extern u_int vj_compress_tcp (struct vjcompress *comp, struct pbuf *pb);
cheungderek 0:e083abcfe7a8 152 extern void vj_uncompress_err (struct vjcompress *comp);
cheungderek 0:e083abcfe7a8 153 extern int vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp);
cheungderek 0:e083abcfe7a8 154 extern int vj_uncompress_tcp (struct pbuf **nb, struct vjcompress *comp);
cheungderek 0:e083abcfe7a8 155
cheungderek 0:e083abcfe7a8 156 #endif /* VJ_H */