tcpmopen.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 75 行

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date	97.09.21.19.30.11;	author dls;	state Dist;
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date	94.01.14.04.11.50;	author dls;	state v2e1;
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@pre-3e code
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@/* tcpmopen.c - tcpmopen */

#include <conf.h>
#include <kernel.h>
#include <network.h>
#include <proc.h>

/*------------------------------------------------------------------------
 *  tcpmopen  -  open a fresh TCP pseudo device and return descriptor
 *------------------------------------------------------------------------
 */
int tcpmopen(pdev, fport, lport)
struct	devsw	*pdev;
char		*fport;
int		lport;
{
	struct	tcb	*ptcb;
	int		error;

	ptcb = (struct tcb *)tcballoc();
	if (ptcb == (struct tcb *)SYSERR)
		return SYSERR;
	ptcb->tcb_error = 0;
	proctab[currpid].ptcpumode = FALSE;
	if (fport == ANYFPORT)
		return tcpserver(ptcb, lport);

	if (tcpbind(ptcb, fport, lport) != OK ||
	    tcpsync(ptcb) != OK) {
		ptcb->tcb_state = TCPS_FREE;
		sdelete(ptcb->tcb_mutex);
		return SYSERR;
	}
	if (error = tcpcon(ptcb))
		return error;
	return ptcb->tcb_dvnum;
}
@


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