/
TcpStack.h
117 lines (104 loc) · 4.08 KB
/
TcpStack.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
/*
TCP Stack for New EtherEnc based on Enc28Core
by Renato Aloi NOV 2014
* seriallink.com.br
*/
/*
EtherEncLib - Ethernet ENC28J60 Library for Arduino
Copyright (C) 2015 Renato Aloi
renato.aloi@gmail.com -- http://www.seriallink.com.br
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TCPSTACK_H
#define TCPSTACK_H
#include <Arduino.h>
#include <stdint.h>
//--- made by SKA ---
#include <SPI.h>
#define DATA_SIZE_HARDWARE 1024 // we can go up to 1500, but for first tests, lets keep it 1K
#define DATA_SIZE 58 // only for TCP Header = ETH_HEADER_LEN_V + IP_HEADER_LEN_V + TCP_HEADER_LEN_PLAIN_V + 4
// for data part: enc28's hadware buffer
// by Renato Aloi (May 2015)
#define MAC_SIZE 6
#define IP_SIZE 4
#define DEBUG 0
#define DEBUGLT 1
#define DEBUGTST 0 // Debugging why only working with DEBUG flag on.
//now it is ok, see delay at close function
#define ETH_ARP_LEN 42
typedef uint8_t uchar;
typedef uint32_t ulong;
typedef uint16_t uint;
union longb { uchar b[4]; ulong l; };
class TcpStack {
private:
uint m_packetId;
uint m_sessionPort;
uint m_serverPort;
uchar m_tcpData[DATA_SIZE]; // need only for TCP header, for data: using enc28's hardware buffer (by Renato Aloi - May 2015)
uchar m_sendData[DATA_SIZE]; // need only for TCP header, also -- Total RAM consumption: 116 bytes
longb m_seqNum; // Need math, sucks
longb m_ackNum;
uchar m_macAddr[MAC_SIZE]; // No need math, passing through
uchar m_clientMacAddr[MAC_SIZE]; // Client's info
uchar m_clientIpAddr[IP_SIZE];
uchar m_ipAddr[IP_SIZE];
bool m_established;
bool m_buffering;
bool m_responding;
bool m_closing;
uint m_recvPayload;
uint m_sendPayload;
uint m_sizePayload;
uint m_rxPointer;
uint m_txPointer; // took me 2 years to uncomment this line! Renato Aloi May 2015
void handleStack(void);
bool isSession() { return m_sessionPort != 0; };
void returnArp(void);
void returnIcmp(void);
void returnSyn(void);
void returnPush(void);
void returnHttp(void); //(uchar* _buf, uint _size);
void returnClose(void);
void returnFin(void);
void waitForDMACopy(void);
unsigned int checksumDMA(unsigned int len);
int freeRam () {
extern int __heap_start, *__brkval;
int v;
return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
};
public:
TcpStack() : m_responding(false), m_packetId(0), m_rxPointer(0), m_txPointer(0),
m_recvPayload(0), m_sendPayload(0), m_sizePayload(0),
m_buffering(false), m_established(false), m_closing(false),
m_sessionPort(0), m_serverPort(0)
{
m_seqNum.l = 0L;
m_ackNum.l = 0L;
for (unsigned i = 0; i < MAC_SIZE; i++) m_macAddr[i] = 0;
for (unsigned i = 0; i < IP_SIZE; i++) m_ipAddr[i] = 0;
for (unsigned i = 0; i < DATA_SIZE; i++) { m_tcpData[i] = 0; m_sendData[i] = 0; }
};
void setMacAddr(uchar* mac) { for (unsigned i = 0; i < MAC_SIZE; i++) m_macAddr[i] = mac[i]; };
void setIpAddr(uchar* ip) { for (unsigned i = 0; i < IP_SIZE; i++) m_ipAddr[i] = ip[i]; };
void open(uint serverPort);
//void write(char *rd, uint len) { returnHttp((uchar*)rd, len); };
void write(char c);
void send(void) { returnHttp(); m_txPointer = 0; m_sizePayload = 0; };
char read(void); // return char or -1 if reachs end
void close(void) { if (m_sizePayload) send(); returnClose(); m_closing = true; };
bool established(void) { handleStack(); return m_established; };
bool closing(void) { return m_closing; };
bool buffering(void) { return m_buffering; };
};
#endif //TCPSTACK_H