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/tcb.c
- Committer:
- andrewboyson
- Date:
- 2018-11-15
- Revision:
- 80:4ef1500fca1d
- Parent:
- 79:f50e02fb5c94
- Child:
- 83:08c983006a6e
File content as of revision 80:4ef1500fca1d:
#include <stdint.h> #include "log.h" #include "tcp.h" #include "tcb.h" #include "clock.h" #define TCB_COUNT 10 struct tcb tcbs[TCB_COUNT]; uint32_t TcbGetIsn() { static uint32_t isn = 0; isn += 100000; //Gives each tcb 100,000 packets and won't repeat before 42,940 tcbs. return isn; } struct tcb* TcbGetExisting(int ipType, int remArIndex, int locIpScope, uint16_t remPort, uint16_t locPort) { for (int i = 0; i < TCB_COUNT; i++) { struct tcb* pTcb = tcbs + i; if (pTcb->state && pTcb->ipType == ipType && pTcb->remArIndex == remArIndex && pTcb->locIpScope == locIpScope && pTcb->remPort == remPort && pTcb->locPort == locPort) return pTcb; } return NULL; } struct tcb* TcbGetEmpty() { for (int i = 0; i < TCB_COUNT; i++) { struct tcb* pTcb = tcbs + i; if (pTcb->state == TCB_EMPTY) return pTcb; } return NULL; } void TcbGetNext(struct tcb** ppTcb) { if (!*ppTcb) //Initialise if passed NULL { *ppTcb = tcbs; return; } ++*ppTcb; //Increment if (*ppTcb >= tcbs + TCB_COUNT) *ppTcb = tcbs; } uint32_t TcbElapsed = 0; void TcbMain() { if (ClockTicked) TcbElapsed++; } void TcbInit() { for (int i = 0; i < TCB_COUNT; i++) tcbs[i].state = TCB_EMPTY; }