/* Copyright (C) 2007-2020 Open Information Security Foundation

 *

 * You can copy, redistribute or modify this Program under the terms of

 * the GNU General Public License version 2 as published by the Free

 * Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * version 2 along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA.

 */

/**

 * \file

 *

 * \author William Metcalf <william.metcalf@gmail.com>

 *

 * RespondReject is a threaded wrapper for sending Rejects

 *

 */

#include "suricata-common.h"

#include "packet.h"

#include "decode.h"

#include "packet-queue.h"

#include "threads.h"

#include "threadvars.h"

#include "tm-queuehandlers.h"

#include "tm-threads.h"

#include "action-globals.h"

#include "respond-reject.h"

#include "respond-reject-libnet11.h"

#include "util-debug.h"

#include "util-privs.h"

int RejectSendIPv4TCP(ThreadVars *, Packet *, void *);

int RejectSendIPv4ICMP(ThreadVars *, Packet *, void *);

int RejectSendIPv6TCP(ThreadVars *, Packet *, void *);

int RejectSendIPv6ICMP(ThreadVars *, Packet *, void *);

static TmEcode RespondRejectFunc(ThreadVars *tv, Packet *p, void *data);

static TmEcode RespondRejectThreadDeinit(ThreadVars *tv, void *data);

void TmModuleRespondRejectRegister (void)

{

    tmm_modules[TMM_RESPONDREJECT].name = "RespondReject";

    tmm_modules[TMM_RESPONDREJECT].ThreadInit = NULL;

    tmm_modules[TMM_RESPONDREJECT].Func = RespondRejectFunc;

    tmm_modules[TMM_RESPONDREJECT].ThreadDeinit = RespondRejectThreadDeinit;

    tmm_modules[TMM_RESPONDREJECT].cap_flags = 0; /* libnet is not compat with caps */

}

static TmEcode RespondRejectThreadDeinit(ThreadVars *tv, void *data)

{

    FreeCachedCtx();

    return TM_ECODE_OK;

}

static TmEcode RespondRejectFunc(ThreadVars *tv, Packet *p, void *data)

{

    /* ACTION_REJECT defaults to rejecting the SRC */

    if (likely(PacketCheckAction(p, ACTION_REJECT_ANY) == 0)) {

        return TM_ECODE_OK;

    }

    if (IS_TUNNEL_PKT(p)) {

        return TM_ECODE_OK;

    }

    if (PKT_IS_IPV4(p)) {

        if (PKT_IS_TCP(p)) {

            (void)RejectSendIPv4TCP(tv, p, data);

        } else {

            (void)RejectSendIPv4ICMP(tv, p, data);

        }

    } else if (PKT_IS_IPV6(p)) {

        if (PKT_IS_TCP(p)) {

            (void)RejectSendIPv6TCP(tv, p, data);

        } else {

            (void)RejectSendIPv6ICMP(tv, p, data);

        }

    }

    return TM_ECODE_OK;

}

int RejectSendIPv4TCP(ThreadVars *tv, Packet *p, void *data)

{

    SCEnter();

    if (PacketCheckAction(p, ACTION_REJECT)) {

        int r = RejectSendLibnet11IPv4TCP(tv, p, data, REJECT_DIR_SRC);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_DST)) {

        int r = RejectSendLibnet11IPv4TCP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_BOTH)) {

        int r = RejectSendLibnet11IPv4TCP(tv, p, data, REJECT_DIR_SRC);

        r |= RejectSendLibnet11IPv4TCP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    }

    SCReturnInt(0);

}

int RejectSendIPv4ICMP(ThreadVars *tv, Packet *p, void *data)

{

    SCEnter();

    if (PacketCheckAction(p, ACTION_REJECT)) {

        int r = RejectSendLibnet11IPv4ICMP(tv, p, data, REJECT_DIR_SRC);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_DST)) {

        int r = RejectSendLibnet11IPv4ICMP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_BOTH)) {

        int r = RejectSendLibnet11IPv4ICMP(tv, p, data, REJECT_DIR_SRC);

        r |= RejectSendLibnet11IPv4ICMP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    }

    SCReturnInt(0);

}

int RejectSendIPv6TCP(ThreadVars *tv, Packet *p, void *data)

{

    SCEnter();

    if (PacketCheckAction(p, ACTION_REJECT)) {

        int r = RejectSendLibnet11IPv6TCP(tv, p, data, REJECT_DIR_SRC);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_DST)) {

        int r = RejectSendLibnet11IPv6TCP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_BOTH)) {

        int r = RejectSendLibnet11IPv6TCP(tv, p, data, REJECT_DIR_SRC);

        r |= RejectSendLibnet11IPv6TCP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    }

    SCReturnInt(0);

}

int RejectSendIPv6ICMP(ThreadVars *tv, Packet *p, void *data)

{

    SCEnter();

    if (PacketCheckAction(p, ACTION_REJECT)) {

        int r = RejectSendLibnet11IPv6ICMP(tv, p, data, REJECT_DIR_SRC);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_DST)) {

        int r = RejectSendLibnet11IPv6ICMP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    } else if (PacketCheckAction(p, ACTION_REJECT_BOTH)) {

        int r = RejectSendLibnet11IPv6ICMP(tv, p, data, REJECT_DIR_SRC);

        r |= RejectSendLibnet11IPv6ICMP(tv, p, data, REJECT_DIR_DST);

        SCReturnInt(r);

    }

    SCReturnInt(0);

}