/*------------------------------------------------------------------------
* tcpcntl - control function for TCP pseudo-devices
*------------------------------------------------------------------------
*/
int
tcpcntl(struct devsw *pdev, int func, void *arg, void *arg2)
{
struct tcb *ptcb = (struct tcb *)pdev->dvioblk;
int rv;
if (ptcb == NULL || ptcb->tcb_state == TCPS_FREE)
return SYSERR;
wait(ptcb->tcb_mutex);
if (ptcb->tcb_state == TCPS_FREE) /* verify no state change */
return SYSERR;
switch (func) {
case TCPC_ACCEPT: if (ptcb->tcb_type != TCPT_SERVER) {
rv = SYSERR;
break;
}
signal(ptcb->tcb_mutex);
return preceive(ptcb->tcb_listenq);
case TCPC_LISTENQ: rv = tcplq(ptcb, (int)arg);
break;
case TCPC_STATUS: rv = tcpstat(ptcb, (struct tcpstat *)arg);
break;
case TCPC_SOPT:
case TCPC_COPT: rv = tcpuopt(ptcb, func, (u_int)arg);
break;
case TCPC_SENDURG: /*
* tcpwr acquires and releases tcb_mutex
* itself.
*/
signal(ptcb->tcb_mutex);
return tcpwr(pdev, (u_char *)arg,
(unsigned)arg2, TWF_URGENT);
default:
rv = SYSERR;
}
signal(ptcb->tcb_mutex);
return rv;
}
/*------------------------------------------------------------------------
* tcpputc - write one character to a TCP pseudo-device
*------------------------------------------------------------------------
*/
int
tcpputc(struct devsw *pdev, unsigned char ch)
{
return tcpwr(pdev, &ch, 1, TWF_NORMAL);
}
/*------------------------------------------------------------------------
* tcpwrite - write one buffer from a TCP pseudo-device
*------------------------------------------------------------------------
*/
int
tcpwrite(struct devsw *pdev, unsigned char *pch, unsigned len)
{
return tcpwr(pdev, pch, len, TWF_NORMAL);
}
