/* tcpLib.c - tcp protocol interface library *//* Copyright 1984 - 2002 Wind River Systems, Inc. */#include "copyright_wrs.h"/*modification history--------------------01e,20may02,vvv  moved tcpstates[] definition and pTcpStates initialization                 from tcp_debug.c (SPR #62272)01d,15oct01,rae  merge from truestack ver 01e, base 01c (TCP_RAND_FUNC)01c,14nov00,ham  fixed unnecessary dependency against tcp_debug(SPR 62272).01b,31jan97,vin  added new variable for connection timeout.01a,20jan97,vin  written*//*DESCRIPTIONThis library contains the interface to the tcp protocol. The TCP protocolis configured in this library. The routine tcpLibInit() is responsible for configuring the tcp protocolwith various parameters.INCLUDE FILES: netLib.h.pG "Network"NOMANUAL*//* includes */#include "vxWorks.h"#include "netLib.h"#include "net/protosw.h"#include "net/domain.h"#include "net/mbuf.h"#include "netinet/in.h"#include "netinet/in_systm.h"#include "netinet/in_pcb.h"#include "netinet/ip.h"#include "netinet/ip_var.h"#include "netinet/tcp.h"#include "netinet/tcp_fsm.h"#include "netinet/tcp_seq.h"#include "netinet/tcp_timer.h"#include "netinet/tcp_var.h"#include "netinet/tcpip.h"#include "netinet/tcp_debug.h"#include "memPartLib.h"#ifdef VIRTUAL_STACK#include "netinet/vsLib.h"#else/* externs */IMPORT int	_protoSwIndex;IMPORT struct 	protosw	inetsw [IP_PROTO_NUM_MAX]; IMPORT int	tcp_do_rfc1323;IMPORT u_long	tcp_sendspace;IMPORT u_long	tcp_recvspace;IMPORT int	tcp_keepinit;IMPORT int	tcprexmtthresh;IMPORT int 	tcp_mssdflt;IMPORT int 	tcp_rttdflt;IMPORT int	tcp_keepidle;IMPORT int	tcp_keepcnt;#endif/* globals */char **         pTcpstates = NULL;char *tcpstates[] = { "CLOSED",      "LISTEN",     "SYN_SENT",   "SYN_RCVD",		      "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",		      "LAST_ACK",    "FIN_WAIT_2", "TIME_WAIT" };/* defines *//* typedefs *//* locals */STATUS tcpLibInit     (    TCP_CFG_PARAMS * 	tcpCfg		/* tcp configuration parameters */    )    {#ifdef VIRTUAL_STACK    VS_TCP * pGlobals;#endif    FAST struct protosw	* pProtoSwitch;     if (_protoSwIndex >= sizeof(inetsw)/sizeof(inetsw[0]))	return (ERROR) ;    pProtoSwitch = &inetsw [_protoSwIndex];     if (pProtoSwitch->pr_domain != NULL)	return (OK); 				/* already initialized */#ifdef VIRTUAL_STACK    /* Allocate space for former global variables. */    pGlobals = KHEAP_ALLOC (sizeof (VS_TCP));    if (pGlobals == NULL)        return (ERROR);    bzero ( (char *)pGlobals, sizeof (VS_TCP));    vsTbl [myStackNum]->pTcpGlobals = pGlobals;#endif    pProtoSwitch->pr_type   	=  SOCK_STREAM;    pProtoSwitch->pr_domain   	=  &inetdomain;    pProtoSwitch->pr_protocol   =  IPPROTO_TCP;    pProtoSwitch->pr_flags	=  PR_CONNREQUIRED | PR_WANTRCVD;    pProtoSwitch->pr_input	=  tcp_input;    pProtoSwitch->pr_output	=  0;    pProtoSwitch->pr_ctlinput	=  tcp_ctlinput;    pProtoSwitch->pr_ctloutput	=  tcp_ctloutput;    pProtoSwitch->pr_usrreq	=  tcp_usrreq;    pProtoSwitch->pr_init	=  tcp_init;    pProtoSwitch->pr_fasttimo	=  tcp_fasttimo;    pProtoSwitch->pr_slowtimo	=  tcp_slowtimo;    pProtoSwitch->pr_drain	=  tcp_drain;    pProtoSwitch->pr_sysctl	=  0;    _protoSwIndex++;     /* initialize tcp configuration parameters */    tcp_do_rfc1323 = (tcpCfg->tcpCfgFlags & TCP_DO_RFC1323) ? TRUE : FALSE;     tcp_sendspace  = tcpCfg->tcpSndSpace;    tcp_recvspace  = tcpCfg->tcpRcvSpace;    tcp_keepinit   = tcpCfg->tcpConnectTime;    tcprexmtthresh = tcpCfg->tcpReTxThresh;    tcp_mssdflt	   = tcpCfg->tcpMssDflt;    tcp_rttdflt    = tcpCfg->tcpRttDflt;    tcp_keepidle   = tcpCfg->tcpKeepIdle;    tcp_keepcnt    = tcpCfg->tcpKeepCnt;#ifdef VIRTUAL_STACK    /*     * Assign (former) global variables previously initialized by the compiler.     * Setting 0 is repeated for clarity - the vsLib.c setup zeroes all values.     */   tcp_last_inpcb = NULL; 			/* tcp_input.c */   tcp_do_rfc1323 = 1; 				/* tcp_subr.c */   tcp_pcbhashsize = 128; 			/* tcp_subr.c (TCBHASHSIZE) */   tcp_keepintvl = TCPTV_KEEPINTVL; 		/* tcp_timer.c */   tcp_maxpersistidle = TCPTV_KEEP_IDLE; 	/* tcp_timer.c */#endif    tcpRandHookAdd (tcpCfg->pTcpRandFunc);    pTcpstates = tcpstates;    return (OK);     }