tcphowmuch.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 60 行

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date	97.09.21.19.29.52;	author dls;	state Dist;
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date	94.01.14.03.51.20;	author dls;	state v2e1;
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@/* tcphowmuch.c.c - tcphowmuch */

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

/*------------------------------------------------------------------------
 *  tcphowmuch.c - compute how much data is available to send
 *------------------------------------------------------------------------
 */
int tcphowmuch(ptcb)
struct	tcb	*ptcb;
{
	int	tosend;

	tosend = ptcb->tcb_suna + ptcb->tcb_sbcount - ptcb->tcb_snext;
	if (ptcb->tcb_code & TCPF_SYN)
		++tosend;
	if (ptcb->tcb_flags & TCBF_SNDFIN)
		++tosend;
	return tosend;
}
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