/*	$OpenBSD: if_san_obsd.c,v 1.5 2004/11/28 23:39:45 canacar Exp $	*/

/*-
 * Copyright (c) 2001-2004 Sangoma Technologies (SAN)
 * All rights reserved.  www.sangoma.com
 *
 * This code is written by Alex Feldman <al.feldman@sangoma.com> for SAN.
 *
 * 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 Sangoma Technologies 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 SANGOMA TECHNOLOGIES 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 FOUNDATION 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.
 */

# include <sys/types.h>
# include <sys/param.h>
# include <sys/systm.h>
# include <sys/syslog.h>
# include <sys/ioccom.h>
# include <sys/conf.h>
# include <sys/malloc.h>
# include <sys/errno.h>
# include <sys/exec.h>
# include <sys/mbuf.h>
# include <sys/sockio.h>
# include <sys/socket.h>
# include <sys/kernel.h>
# include <sys/device.h>
# include <sys/time.h>
# include <sys/timeout.h>

# include <net/if.h>
# include <net/if_media.h>
# include <net/netisr.h>
# include <net/if_sppp.h>
# include <netinet/in_systm.h>
# include <netinet/in.h>

# include <netinet/udp.h>
# include <netinet/ip.h>

#include <dev/pci/if_san_common.h>
#include <dev/pci/if_san_obsd.h>


#ifdef	_DEBUG_
#define	STATIC
#else
#define	STATIC		static
#endif


static sdla_t *wanpipe_generic_getcard(struct ifnet *);
static int wanpipe_generic_ioctl(struct ifnet *, u_long, caddr_t);
static void wanpipe_generic_watchdog(struct ifnet*);
static void wanpipe_generic_start(struct ifnet *);


static char *san_ifname_format = "san%d";



static sdla_t *
wanpipe_generic_getcard(struct ifnet *ifp)
{
	sdla_t*	card;

	if (ifp->if_softc == NULL) {
		log(LOG_INFO, "%s: Invalid device private structure pointer\n",
				ifp->if_xname);
		return (NULL);
	}
	card = ((sdla_t*)((wanpipe_common_t*)ifp->if_softc)->card);
	if (card == NULL) {
		log(LOG_INFO, "%s: Invalid Sangoma device card\n",
		    ifp->if_xname);
		return (NULL);
	}
	return (card);
}

int
wanpipe_generic_name(sdla_t *card, char *ifname)
{
	static int	ifunit = 0;
#if 0
	char		if_name[IFNAMSIZ+1];

	snprintf(if_name, strlen(if_name), ifname_format, ifunit++);
	bcopy(if_name, ifname, strlen(if_name));
#endif
	snprintf(ifname, IFNAMSIZ+1, san_ifname_format, ifunit++);
	return (0);
}

int
wanpipe_generic_register(sdla_t *card, struct ifnet *ifp, char *ifname)
{
	if (ifname == NULL || strlen(ifname) > IFNAMSIZ) {
		return (-EINVAL);
	} else {
		bcopy(ifname, ifp->if_xname, strlen(ifname));
	}
	IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
	ifp->if_mtu = PP_MTU;
	ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
	((struct sppp *)ifp)->pp_flags |= PP_CISCO;
	((struct sppp *)ifp)->pp_flags |= PP_KEEPALIVE;
	((struct sppp *)ifp)->pp_framebytes = 3;
	ifp->if_ioctl = wanpipe_generic_ioctl;	/* Will set from new_if() */
	ifp->if_start = wanpipe_generic_start;
	ifp->if_watchdog = wanpipe_generic_watchdog;

	if_attach(ifp);
	if_alloc_sadl(ifp);
	sppp_attach(ifp);
#if NBPFILTER > 0
	bpfattach(&ifp->if_bpf, ifp, DLT_NULL, 4);
#endif /* NBPFILTER > 0 */
	return (0);
}

void
wanpipe_generic_unregister(struct ifnet *ifp)
{
	log(LOG_INFO, "%s: Unregister interface!\n",
	    ifp->if_xname);
	sppp_detach(ifp);
	if_free_sadl(ifp);
	if_detach(ifp);
}

static void
wanpipe_generic_start(struct ifnet *ifp)
{
	sdla_t		*card;
	struct mbuf	*opkt;
	int		 err = 0;
#if NBPFILTER > 0
	struct mbuf	m0;
	u_int32_t	af = AF_INET;
#endif /* NBPFILTER > 0 */

	if ((card = wanpipe_generic_getcard(ifp)) == NULL) {
		return;
	}
	while (1) {
		if (sppp_isempty(ifp)) {
			/* No more packets in send queue */
			break;
		}

		if ((opkt = sppp_dequeue(ifp)) == NULL) {
			/* Should never happened, packet pointer is NULL */
			break;
		}
		if (card->iface_send == NULL) {
			m_freem(opkt);
			break;
		}
		/* report the packet to BPF if present and attached */
#if NBPFILTER > 0
		if (ifp->if_bpf) {
			m0.m_next = opkt;
			m0.m_len = 4;
			m0.m_data = (char*)&af;
			bpf_mtap(ifp->if_bpf, &m0);
		}
#endif /* NBPFILTER > 0 */

		err = card->iface_send(opkt, ifp);
		if (err) {
			break;
		}
	}
	return;
}


static int
wanpipe_generic_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
	struct ifreq		*ifr = (struct ifreq*)data;
	sdla_t			*card;
	wanpipe_common_t*	common = WAN_IFP_TO_COMMON(ifp);
	struct if_settings	ifsettings;
	unsigned long		ts_map;
	int			err = 0, s;

	if ((card = wanpipe_generic_getcard(ifp)) == NULL) {
		return (-EINVAL);
	}
	s = splnet();
	switch (cmd) {
	case SIOCSIFADDR:
		err = 1;
		break;

	case SIOCSIFMEDIA:
		/* You can't set new media type while card is running */
		if (card->state != WAN_DISCONNECTED) {
			log(LOG_INFO, "%s: Unable to change media type!\n",
			    ifp->if_xname);
			err = -EINVAL;
			goto ioctl_out;
		}
		err = ifmedia_ioctl(ifp, ifr, &common->ifm, cmd);
		break;

	case SIOCGIFMEDIA:
		err = ifmedia_ioctl(ifp, ifr, &common->ifm, cmd);
		break;

	case SIOCSIFTIMESLOT:
		if (card->state != WAN_DISCONNECTED) {
			log(LOG_INFO, "%s: Unable to change timeslot map!\n",
			    ifp->if_xname);
			err = -EINVAL;
			goto ioctl_out;
		}
		err = copyin(ifr->ifr_data, &ts_map, sizeof(ts_map));
		if (err)
			goto ioctl_out;
		sdla_te_settimeslot(card, ts_map);
		break;

	case SIOCGIFTIMESLOT:
		ts_map = sdla_te_gettimeslot(card);
		err = copyout(ifr->ifr_data, &ts_map, sizeof(ts_map));
		if (err)
			goto ioctl_out;
		break;

	case SIOCSIFFLAGS:
	    	/*
     		** If the interface is marked up - enable communications. 
	     	** If down - disable communications.  IFF_UP is taken 
		** care of before entering this function.
	     	*/
		if ((ifp->if_flags & IFF_UP) == 0) {
			/* bring it down */
			log(LOG_INFO, "%s: Bringing interface down.\n",
			    ifp->if_xname);
			if (card->iface_down) {
				card->iface_down(ifp);
			}
		}else{ /* bring it up */ 
			log(LOG_INFO, "%s: Bringing interface up.\n",
			    ifp->if_xname);
			if (card->iface_up) {
				card->iface_up(ifp);
			}
			wanpipe_generic_start(ifp);
		}
		break;

	case SIOC_WANPIPE_DEVICE:
		err = copyin(ifr->ifr_data,
				&ifsettings,
				sizeof(struct if_settings));
		if (err) {
			log(LOG_INFO, "%s: Failed to copy from user space!\n",
						card->devname);
			goto ioctl_out;
		}
		switch (ifsettings.type) {
		case IF_GET_PROTO:
			ifsettings.type = common->protocol;
			err = copyout(&ifsettings, ifr->ifr_data,
			    sizeof(struct if_settings));
			if (err) {
				log(LOG_INFO, "%s: Failed to copy to uspace!\n",
				    card->devname);
			}
			break;

		case IF_PROTO_CISCO:
		case IF_PROTO_PPP:
			err = wp_lite_set_proto(ifp, (struct ifreq*)data);
			break;

		default:
			if (card->iface_ioctl) {
				err = card->iface_ioctl(ifp, cmd,
				    (struct ifreq*)data);
			}
			break;
		}
		break;

	default:
		if (card->iface_ioctl) {
			/* Argument seqeunce is change for Linux order */
			err = card->iface_ioctl(ifp, cmd, (struct ifreq*)data);
		}
		break;
	}

	if (err) {
		err = sppp_ioctl(ifp, cmd, data);
	}
ioctl_out:
	splx(s);
	return (err);
}

static void
wanpipe_generic_watchdog(struct ifnet *ifp)
{
	return;
}

int
wanpipe_generic_open(struct ifnet *ifp)
{
	return (0);
}

int
wanpipe_generic_close(struct ifnet *ifp)
{
	return (0);
}

int
wanpipe_generic_input(struct ifnet *ifp, struct mbuf *m)
{
	sdla_t		*card;
#if NBPFILTER > 0
	struct mbuf	m0;
	u_int32_t	af = AF_INET;
#endif /* NBPFILTER > 0 */

	if ((card = wanpipe_generic_getcard(ifp)) == NULL) {
		return (-EINVAL);
	}
	m->m_pkthdr.rcvif = ifp;
#if NBPFILTER > 0
	if (ifp->if_bpf) {
		m0.m_next = m;
		m0.m_len = 4;
		m0.m_data = (char*)&af;
		bpf_mtap(ifp->if_bpf, &m0);
	}
#endif /* NBPFILTER > 0 */
	ifp->if_ipackets ++;
	ifp->if_ibytes += m->m_len;
	sppp_input(ifp, m);
	return (0);
}

int
wp_lite_set_proto(struct ifnet *ifp, struct ifreq *ifr)
{
	wanpipe_common_t	*common;
	struct if_settings	*ifsettings;
	int			 err = 0;

	if ((common = ifp->if_softc) == NULL) {
		log(LOG_INFO, "%s: Private structure is null!\n",
				ifp->if_xname);
		return (-EINVAL);
	}
	ifsettings = (struct if_settings*)ifr->ifr_data;
	switch (ifsettings->type) {
	case IF_PROTO_CISCO:
		((struct sppp *)ifp)->pp_flags |= PP_CISCO;
		((struct sppp *)ifp)->pp_flags |= PP_KEEPALIVE;
		break;
	case IF_PROTO_PPP:
		((struct sppp *)ifp)->pp_flags &= ~PP_CISCO;
		((struct sppp *)ifp)->pp_flags &= ~PP_KEEPALIVE;
		break;
	}
	err = sppp_ioctl(ifp, SIOCSIFFLAGS, ifr);
	return (err);
}