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/tcb.c@160:6a1d1d368f80, 2019-09-29 (annotated)

Committer:
andrewboyson
Date:
Sun Sep 29 18:51:58 2019 +0000
Revision:
160:6a1d1d368f80
Parent:
156:be12b8fd5b21
Child:
161:89609cf070b4
Corrected some minor bugs

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 61:aad055f1b0d1 1 #include <stdint.h>
andrewboyson 61:aad055f1b0d1 2
andrewboyson 66:18a10c0b6d93 3 #include "log.h"
andrewboyson 66:18a10c0b6d93 4 #include "tcp.h"
andrewboyson 66:18a10c0b6d93 5 #include "tcb.h"
andrewboyson 52:fbc5a46b5e16 6
andrewboyson 88:1ba13e6062a3 7 #define TCB_COUNT 20
andrewboyson 10:f0854784e960 8
andrewboyson 10:f0854784e960 9 struct tcb tcbs[TCB_COUNT];
andrewboyson 10:f0854784e960 10
andrewboyson 10:f0854784e960 11 uint32_t TcbGetIsn()
andrewboyson 10:f0854784e960 12 {
andrewboyson 10:f0854784e960 13 static uint32_t isn = 0;
andrewboyson 10:f0854784e960 14 isn += 100000; //Gives each tcb 100,000 packets and won't repeat before 42,940 tcbs.
andrewboyson 10:f0854784e960 15 return isn;
andrewboyson 10:f0854784e960 16 }
andrewboyson 80:4ef1500fca1d 17 struct tcb* TcbGetExisting(int ipType, int remArIndex, int locIpScope, uint16_t remPort, uint16_t locPort)
andrewboyson 10:f0854784e960 18 {
andrewboyson 10:f0854784e960 19 for (int i = 0; i < TCB_COUNT; i++)
andrewboyson 10:f0854784e960 20 {
andrewboyson 10:f0854784e960 21 struct tcb* pTcb = tcbs + i;
andrewboyson 78:9d8fc88df405 22 if (pTcb->state &&
andrewboyson 78:9d8fc88df405 23 pTcb->ipType == ipType &&
andrewboyson 78:9d8fc88df405 24 pTcb->remArIndex == remArIndex &&
andrewboyson 80:4ef1500fca1d 25 pTcb->locIpScope == locIpScope &&
andrewboyson 80:4ef1500fca1d 26 pTcb->remPort == remPort &&
andrewboyson 80:4ef1500fca1d 27 pTcb->locPort == locPort) return pTcb;
andrewboyson 10:f0854784e960 28 }
andrewboyson 10:f0854784e960 29 return NULL;
andrewboyson 10:f0854784e960 30 }
andrewboyson 10:f0854784e960 31 struct tcb* TcbGetEmpty()
andrewboyson 10:f0854784e960 32 {
andrewboyson 10:f0854784e960 33 for (int i = 0; i < TCB_COUNT; i++)
andrewboyson 10:f0854784e960 34 {
andrewboyson 10:f0854784e960 35 struct tcb* pTcb = tcbs + i;
andrewboyson 57:e0fb648acf48 36 if (pTcb->state == TCB_EMPTY) return pTcb;
andrewboyson 10:f0854784e960 37 }
andrewboyson 10:f0854784e960 38 return NULL;
andrewboyson 10:f0854784e960 39 }
andrewboyson 83:08c983006a6e 40 struct tcb* TcbGetNext(struct tcb* pTcb)
andrewboyson 74:c3756bfa960e 41 {
andrewboyson 83:08c983006a6e 42 if (!pTcb) return tcbs; //Initialise if passed NULL
andrewboyson 83:08c983006a6e 43 ++pTcb; //Increment
andrewboyson 83:08c983006a6e 44 if (pTcb < tcbs + TCB_COUNT) return pTcb;
andrewboyson 83:08c983006a6e 45 else return tcbs;
andrewboyson 83:08c983006a6e 46
andrewboyson 74:c3756bfa960e 47 }
andrewboyson 156:be12b8fd5b21 48 int TcbGetId(struct tcb* pTcb) //0 means none
andrewboyson 156:be12b8fd5b21 49 {
andrewboyson 156:be12b8fd5b21 50 return pTcb - tcbs + 1;
andrewboyson 156:be12b8fd5b21 51 }
andrewboyson 10:f0854784e960 52 void TcbInit()
andrewboyson 10:f0854784e960 53 {
andrewboyson 57:e0fb648acf48 54 for (int i = 0; i < TCB_COUNT; i++) tcbs[i].state = TCB_EMPTY;
andrewboyson 52:fbc5a46b5e16 55 }