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/* 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);
}
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