/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/t_kuser.h>
#include <sys/netconfig.h>
#include <netinet/in.h>
#include <net/route.h>
#include <net/if.h>
#include <sys/kstr.h>
#include <rpc/clnt.h>
#include <sys/stropts.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/bootprops.h>

static int
kivoid_to_sock(int af, void *source, void *dest)
{
        struct sockaddr_in  *sin    =   NULL;
        struct sockaddr_in6 *sin6   =   NULL;

        if (source == NULL || dest == NULL) {
                return (-1);
        }
        if (af == AF_INET) {
                sin = (struct sockaddr_in *)dest;
                (void) bcopy(source, &sin->sin_addr,
                    sizeof (struct in_addr));
                sin->sin_family = af;
        } else if (af == AF_INET6) {
                sin6 = (struct sockaddr_in6 *)dest;
                (void) bcopy(source, &sin6->sin6_addr,
                    sizeof (struct in6_addr));
                sin6->sin6_family = af;
        } else {
                return (-1);
        }
        return (0);
}

int
kdlifconfig(TIUSER *tiptr, int af, void *myIPaddr, void *mymask,
    struct in_addr *mybraddr, struct in_addr *gateway, char *ifname)
{
        int                     rc;
        struct netbuf           sbuf;
        struct sockaddr_in      sin;
        struct sockaddr_in6     sin6;
        struct rtentry          route;
        struct sockaddr_in      *rt_sin;

        if (myIPaddr == NULL || mymask == NULL) {
                return (-1);
        }

        if (af == AF_INET) {
                rc = kivoid_to_sock(af, mymask, &sin);
                if (rc != 0) {
                        return (rc);
                }
                sbuf.buf = (caddr_t)&sin;
                sbuf.maxlen = sbuf.len = sizeof (sin);
        } else {
                rc = kivoid_to_sock(af, mymask, &sin6);
                if (rc != 0) {
                        return (rc);
                }
                sbuf.buf = (caddr_t)&sin6;
                sbuf.maxlen = sbuf.len = sizeof (sin6);
        }
        if (rc = kifioctl(tiptr, SIOCSLIFNETMASK, &sbuf, ifname)) {
                return (rc);
        }

        if (af == AF_INET) {
                rc = kivoid_to_sock(af, myIPaddr, &sin);
                if (rc != 0) {
                        return (rc);
                }
                sbuf.buf = (caddr_t)&sin;
                sbuf.maxlen = sbuf.len = sizeof (sin);
        } else {
                rc = kivoid_to_sock(af, myIPaddr, &sin6);
                if (rc != 0) {
                        return (rc);
                }
                sbuf.buf = (caddr_t)&sin6;
                sbuf.maxlen = sbuf.len = sizeof (sin6);
        }

        if (rc = kifioctl(tiptr, SIOCSLIFADDR, &sbuf, ifname)) {
                return (rc);
        }
        /*
         * Only IPv4 has brocadcast address.
         */
        if (af == AF_INET && mybraddr != NULL) {
                if (mybraddr->s_addr != INADDR_BROADCAST) {
                        rc = kivoid_to_sock(af, mybraddr, &sin);
                        if (rc != 0) {
                                return (rc);
                        }
                        sbuf.buf = (caddr_t)&sin;
                        sbuf.maxlen = sbuf.len = sizeof (sin);
                        if (rc = kifioctl(tiptr, SIOCSLIFBRDADDR, &sbuf,
                            ifname)) {
                                return (rc);
                        }
                }
        }

        /*
         * Now turn on the interface.
         */
        if (rc = ksetifflags(tiptr, IFF_UP, ifname)) {
                return (rc);
        }

        /*
         * Set the default gateway.
         */
        if (af == AF_INET && gateway != NULL) {
                (void) memset(&route, 0, sizeof (route));
                rt_sin = (struct sockaddr_in *)&route.rt_dst;
                rt_sin->sin_family = AF_INET;

                rt_sin = (struct sockaddr_in *)&route.rt_gateway;
                rt_sin->sin_addr.s_addr = gateway->s_addr;
                route.rt_flags = RTF_GATEWAY | RTF_UP;
                sbuf.buf = (caddr_t)&route;
                sbuf.maxlen = sbuf.len = sizeof (route);
                if (rc = kifioctl(tiptr, SIOCADDRT, &sbuf, ifname)) {
                        return (rc);
                }
        }
        return (0);
}

int
kifioctl(TIUSER *tiptr, int cmd, struct netbuf *nbuf, char *ifname)
{
        struct strioctl     iocb;
        struct lifreq       lifr;
        vnode_t             *vp     =   NULL;
        char                *buf    =   NULL;
        int                 rc      =   0;

        (void) memset(&lifr, 0, sizeof (lifr));
        /*
         * Now do the one requested.
         */
        if (nbuf->len) {
                if (nbuf->len == sizeof (struct rtentry)) {
                        if (cmd != SIOCADDRT) {
                                return (-1);
                        }
                        /*
                         * Set up gateway parameters.
                         */
                        iocb.ic_len = nbuf->len;
                        iocb.ic_dp = nbuf->buf;
                } else {
                        if (nbuf->len != sizeof (struct sockaddr_in) &&
                            nbuf->len != sizeof (struct sockaddr_in6)) {
                                return (-1);
                        }
                        buf = (char *)&lifr.lifr_addr;
                        bcopy(nbuf->buf, buf, nbuf->len);
                        iocb.ic_len = sizeof (lifr);
                        iocb.ic_dp = (caddr_t)&lifr;
                }
        } else {
                iocb.ic_len = sizeof (lifr);
                iocb.ic_dp = (caddr_t)&lifr;
        }
        (void) strncpy((caddr_t)&lifr.lifr_name, ifname,
            sizeof (lifr.lifr_name));
        iocb.ic_cmd = cmd;
        iocb.ic_timout = 0;

        vp = tiptr->fp->f_vnode;
        rc = kstr_ioctl(vp, I_STR, (intptr_t)&iocb);
        if (rc) {
                return (rc);
        }

        return (0);
}

int
ksetifflags(TIUSER *tiptr, uint_t value, char *ifname)
{
        int rc;
        struct strioctl iocb;
        struct lifreq lifr;

        if (ifname == NULL) {
                return (-1);
        }

        (void) memset(&lifr, 0, sizeof (lifr));

        (void) strncpy((caddr_t)&lifr.lifr_name, ifname,
            sizeof (lifr.lifr_name));
        iocb.ic_cmd = SIOCGLIFFLAGS;
        iocb.ic_timout = 0;
        iocb.ic_len = sizeof (lifr);
        iocb.ic_dp = (caddr_t)&lifr;
        if (rc = kstr_ioctl(tiptr->fp->f_vnode, I_STR, (intptr_t)&iocb))
                return (rc);

        lifr.lifr_flags |= value;
        iocb.ic_cmd = SIOCSLIFFLAGS;
        return (kstr_ioctl(tiptr->fp->f_vnode, I_STR, (intptr_t)&iocb));
}