/*	$OpenBSD: raw_usrreq.c,v 1.31 2017/03/13 20:18:21 claudio Exp $	*/
/*	$NetBSD: raw_usrreq.c,v 1.11 1996/02/13 22:00:43 christos Exp $	*/

/*
 * Copyright (c) 1980, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)raw_usrreq.c	8.1 (Berkeley) 6/10/93
 */

#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/systm.h>

#include <net/netisr.h>
#include <net/raw_cb.h>

#include <sys/stdarg.h>
/*
 * Initialize raw connection block q.
 */
void
raw_init(void)
{

	LIST_INIT(&rawcb);
}

int
raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
    struct mbuf *control, struct proc *p)
{
	struct rawcb *rp = sotorawcb(so);
	int error = 0;
	int len;

	soassertlocked(so);

	if (req == PRU_CONTROL)
		return (EOPNOTSUPP);
	if (control && control->m_len) {
		m_freem(m);
		return (EOPNOTSUPP);
	}
	if (rp == 0) {
		m_freem(m);
		return (EINVAL);
	}
	switch (req) {
	/*
	 * Destroy state just before socket deallocation.
	 * Flush data or not depending on the options.
	 */
	case PRU_DETACH:
		if (rp == 0) {
			error = ENOTCONN;
			break;
		}
		raw_detach(rp);
		break;

	case PRU_CONNECT:
	case PRU_BIND:
	case PRU_CONNECT2:
		error = EOPNOTSUPP;
		break;

	case PRU_DISCONNECT:
		if (rp->rcb_faddr == 0) {
			error = ENOTCONN;
			break;
		}
		raw_disconnect(rp);
		soisdisconnected(so);
		break;

	/*
	 * Mark the connection as being incapable of further input.
	 */
	case PRU_SHUTDOWN:
		socantsendmore(so);
		break;

	/*
	 * Ship a packet out.  The appropriate raw output
	 * routine handles any massaging necessary.
	 */
	case PRU_SEND:
		if (nam) {
			if (rp->rcb_faddr) {
				error = EISCONN;
				break;
			}
			rp->rcb_faddr = mtod(nam, struct sockaddr *);
		} else if (rp->rcb_faddr == 0) {
			error = ENOTCONN;
			break;
		}
		error = (*so->so_proto->pr_output)(m, so, NULL, NULL);
		m = NULL;
		if (nam)
			rp->rcb_faddr = 0;
		break;

	case PRU_ABORT:
		raw_disconnect(rp);
		sofree(so);
		soisdisconnected(so);
		break;

	case PRU_SENSE:
		/*
		 * stat: don't bother with a blocksize.
		 */
		return (0);

	/*
	 * Not supported.
	 */
	case PRU_RCVOOB:
	case PRU_RCVD:
		return (EOPNOTSUPP);

	case PRU_LISTEN:
	case PRU_ACCEPT:
	case PRU_SENDOOB:
		error = EOPNOTSUPP;
		break;

	case PRU_SOCKADDR:
		if (rp->rcb_laddr == 0) {
			error = EINVAL;
			break;
		}
		len = rp->rcb_laddr->sa_len;
		bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), (unsigned)len);
		nam->m_len = len;
		break;

	case PRU_PEERADDR:
		if (rp->rcb_faddr == 0) {
			error = ENOTCONN;
			break;
		}
		len = rp->rcb_faddr->sa_len;
		bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), (unsigned)len);
		nam->m_len = len;
		break;

	default:
		panic("raw_usrreq");
	}
	m_freem(m);
	return (error);
}