Andrew Boyson / net

A stack which works with or without an Mbed os library. Provides IPv4 or IPv6 with a full 1500 byte buffer.

Dependents:   oldheating gps motorhome heating

tcp/tcpbuf.c@146:0fc66d610fd6, 2019-05-15 (annotated)

Committer:
andrewboyson
Date:
Wed May 15 15:33:15 2019 +0000
Revision:
146:0fc66d610fd6
Parent:
145:206bf0d073c7
Child:
155:22f249751106
Tidied the http shim

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 61:aad055f1b0d1 1 #include <stdbool.h>
andrewboyson 146:0fc66d610fd6 2 #include <stdint.h>
andrewboyson 54:84ef2b29cf7e 3
andrewboyson 79:f50e02fb5c94 4 static uint32_t currentPositionInMessage;
andrewboyson 79:f50e02fb5c94 5 static uint32_t bufferPositionInMessage;
andrewboyson 54:84ef2b29cf7e 6 static int bufferLength;
andrewboyson 54:84ef2b29cf7e 7 static char* pBuffer;
andrewboyson 54:84ef2b29cf7e 8 static char* p;
andrewboyson 54:84ef2b29cf7e 9
andrewboyson 79:f50e02fb5c94 10 void TcpBufStart(uint32_t position, int mss, char *pData)
andrewboyson 54:84ef2b29cf7e 11 {
andrewboyson 54:84ef2b29cf7e 12 currentPositionInMessage = 0;
andrewboyson 54:84ef2b29cf7e 13 bufferPositionInMessage = position;
andrewboyson 54:84ef2b29cf7e 14 bufferLength = mss;
andrewboyson 54:84ef2b29cf7e 15 pBuffer = pData;
andrewboyson 54:84ef2b29cf7e 16 p = pData;
andrewboyson 54:84ef2b29cf7e 17 }
andrewboyson 54:84ef2b29cf7e 18 int TcpBufLength()
andrewboyson 54:84ef2b29cf7e 19 {
andrewboyson 54:84ef2b29cf7e 20 return p - pBuffer;
andrewboyson 54:84ef2b29cf7e 21 }
andrewboyson 145:206bf0d073c7 22 bool TcpBufFilled()
andrewboyson 145:206bf0d073c7 23 {
andrewboyson 145:206bf0d073c7 24 return p - pBuffer >= bufferLength;
andrewboyson 145:206bf0d073c7 25 }
andrewboyson 54:84ef2b29cf7e 26
andrewboyson 54:84ef2b29cf7e 27 void TcpBufAddChar(char c)
andrewboyson 54:84ef2b29cf7e 28 {
andrewboyson 145:206bf0d073c7 29 //Add character if the current position is within the buffer
andrewboyson 145:206bf0d073c7 30 if (currentPositionInMessage >= bufferPositionInMessage &&
andrewboyson 145:206bf0d073c7 31 currentPositionInMessage < bufferPositionInMessage + bufferLength) *p++ = c;
andrewboyson 145:206bf0d073c7 32
andrewboyson 54:84ef2b29cf7e 33 currentPositionInMessage++;
andrewboyson 54:84ef2b29cf7e 34 }