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Diffstat (limited to 'src/respond-reject.c')
| -rw-r--r-- | src/respond-reject.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/respond-reject.c b/src/respond-reject.c new file mode 100644 index 0000000..b53fad9 --- /dev/null +++ b/src/respond-reject.c @@ -0,0 +1,159 @@ +/* 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); +} |