RealTimeCompLab2 / Mbed 2 deprecated webserverBlinky

RealtimeCompLab2

Dependencies:   mbed

Fork of PPP-Blinky by Nicolas Nackel

PPP-Blinky/ppp-blinky.h@152:025c73b6c0a9, 2017-09-01 (annotated)

Committer:
nixnax
Date:
Fri Sep 01 15:25:04 2017 +0000
Revision:
152:025c73b6c0a9
Parent:
150:3366bf3d294e
Child:
153:7993def8663f
PPP, IP and TCP header structures

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nixnax 142:54d1543e23e5 1 /// ppp-blinky.h
nixnax 142:54d1543e23e5 2
nixnax 142:54d1543e23e5 3 #include "mbed.h"
nixnax 142:54d1543e23e5 4 #include "sha1.h"
nixnax 142:54d1543e23e5 5 #include "BufferedSerial.h"
nixnax 142:54d1543e23e5 6
nixnax 144:01d98cf7738e 7 void initializePpp();
nixnax 150:3366bf3d294e 8 int connectedPpp();
nixnax 142:54d1543e23e5 9 void scanForConnectString();
nixnax 142:54d1543e23e5 10 void waitForPppFrame();
nixnax 152:025c73b6c0a9 11 void determinePacketType();
nixnax 152:025c73b6c0a9 12
nixnax 152:025c73b6c0a9 13 typedef struct { // ff 03 00 21
nixnax 152:025c73b6c0a9 14 unsigned int pppAddress : 8, // always 0xff
nixnax 152:025c73b6c0a9 15 pppControl : 8, // always 03
nixnax 152:025c73b6c0a9 16 pppProtocol : 16; // 2100 for IP (byte reversed, should be 0021)
nixnax 152:025c73b6c0a9 17 } pppHeaderType;
nixnax 152:025c73b6c0a9 18
nixnax 152:025c73b6c0a9 19 /// structure of an IP header for small-endian devices
nixnax 152:025c73b6c0a9 20 typedef struct {
nixnax 152:025c73b6c0a9 21 pppHeaderType pppHeader; // first four bytes is the PPP header [ff 03 00 21]
nixnax 152:025c73b6c0a9 22 unsigned int headerLength : 4, // ip headerlength / 4
nixnax 152:025c73b6c0a9 23 version : 4, // ip version number
nixnax 152:025c73b6c0a9 24 ect : 1, // ecn capable transport
nixnax 152:025c73b6c0a9 25 ce : 1, // ecn-ce
nixnax 152:025c73b6c0a9 26 dscp : 6, // differentiated services
nixnax 152:025c73b6c0a9 27 length : 16; // ip packet length (byte-reversed)
nixnax 152:025c73b6c0a9 28
nixnax 152:025c73b6c0a9 29 unsigned int fragmentOffset : 13,
nixnax 152:025c73b6c0a9 30 reserved : 1,
nixnax 152:025c73b6c0a9 31 dontFragment : 1,
nixnax 152:025c73b6c0a9 32 lastFragment : 1,
nixnax 152:025c73b6c0a9 33 ident : 16;
nixnax 152:025c73b6c0a9 34
nixnax 152:025c73b6c0a9 35 unsigned int checksum : 16,
nixnax 152:025c73b6c0a9 36 protocol : 8, // next protocol
nixnax 152:025c73b6c0a9 37 ttl : 8;
nixnax 152:025c73b6c0a9 38
nixnax 152:025c73b6c0a9 39 unsigned int srcAdr; // source IP address
nixnax 152:025c73b6c0a9 40
nixnax 152:025c73b6c0a9 41 unsigned int dstAdr; // destination IP address
nixnax 152:025c73b6c0a9 42 } ipHeaderType;
nixnax 152:025c73b6c0a9 43
nixnax 152:025c73b6c0a9 44 typedef struct {
nixnax 152:025c73b6c0a9 45 ipHeaderType ip; // first part of TCP header is IP header
nixnax 152:025c73b6c0a9 46 unsigned int srcAdr : 16, // byte reversed
nixnax 152:025c73b6c0a9 47 dstAdr : 16; // byte reversed
nixnax 152:025c73b6c0a9 48 unsigned int seqTcp;
nixnax 152:025c73b6c0a9 49 unsigned int ackTcp;
nixnax 152:025c73b6c0a9 50 unsigned int res1 : 4,
nixnax 152:025c73b6c0a9 51 offset : 4; // tcp header length [5..15]
nixnax 152:025c73b6c0a9 52 union {
nixnax 152:025c73b6c0a9 53 unsigned int flags : 8;
nixnax 152:025c73b6c0a9 54 struct {
nixnax 152:025c73b6c0a9 55 unsigned int f:1, s:1, r:1, p:1, a:1, u:1;
nixnax 152:025c73b6c0a9 56 };
nixnax 152:025c73b6c0a9 57 };
nixnax 152:025c73b6c0a9 58 unsigned int window : 16; // byte reversed
nixnax 152:025c73b6c0a9 59 unsigned int checksum : 16, // byte reversed
nixnax 152:025c73b6c0a9 60 urgentPointer : 16; // byte reversed;
nixnax 152:025c73b6c0a9 61 unsigned int tcpOptions[10]; // 10 words of options possible
nixnax 152:025c73b6c0a9 62 } tcpHeaderType1;
nixnax 152:025c73b6c0a9 63
nixnax 152:025c73b6c0a9 64 typedef struct {
nixnax 152:025c73b6c0a9 65 ipHeaderType ip;
nixnax 152:025c73b6c0a9 66 unsigned int options;
nixnax 152:025c73b6c0a9 67 unsigned int srcAdr : 16, // byte reversed
nixnax 152:025c73b6c0a9 68 dstAdr : 16; // byte reversed
nixnax 152:025c73b6c0a9 69 unsigned int seqTcp;
nixnax 152:025c73b6c0a9 70 unsigned int ackTcp;
nixnax 152:025c73b6c0a9 71 unsigned int res1 : 4,
nixnax 152:025c73b6c0a9 72 offset : 4; // tcp header length [5..15]
nixnax 152:025c73b6c0a9 73 union {
nixnax 152:025c73b6c0a9 74 unsigned int flags : 8;
nixnax 152:025c73b6c0a9 75 struct {
nixnax 152:025c73b6c0a9 76 unsigned int f:1, s:1, r:1, p:1, a:1, u:1;
nixnax 152:025c73b6c0a9 77 };
nixnax 152:025c73b6c0a9 78 };
nixnax 152:025c73b6c0a9 79 unsigned int window : 16; // byte reversed
nixnax 152:025c73b6c0a9 80 unsigned int checksum : 16, // byte reversed
nixnax 152:025c73b6c0a9 81 urgentPointer : 16; // byte reversed;
nixnax 152:025c73b6c0a9 82 unsigned int tcpOptions[10]; // 10 words of options possible
nixnax 152:025c73b6c0a9 83 } tcpHeaderType2;
nixnax 152:025c73b6c0a9 84