diff options
Diffstat (limited to 'framework/src/suricata/src/respond-reject.c')
| -rw-r--r-- | framework/src/suricata/src/respond-reject.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/framework/src/suricata/src/respond-reject.c b/framework/src/suricata/src/respond-reject.c new file mode 100644 index 00000000..ea756d7e --- /dev/null +++ b/framework/src/suricata/src/respond-reject.c @@ -0,0 +1,180 @@ +/* Copyright (C) 2007-2010 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 + * + * \todo RespondRejectFunc returns 1 on error, 0 on ok... why? For now it should + * just return 0 always, error handling is a TODO in the threading model (VJ) + */ + +#include "suricata-common.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 *); + +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 = NULL; + tmm_modules[TMM_RESPONDREJECT].RegisterTests = NULL; + tmm_modules[TMM_RESPONDREJECT].cap_flags = 0; /* libnet is not compat with caps */ +} + +TmEcode RespondRejectFunc(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq) +{ + int ret = 0; + + /* ACTION_REJECT defaults to rejecting the SRC */ + if (!(PACKET_TEST_ACTION(p, ACTION_REJECT)) && + !(PACKET_TEST_ACTION(p, ACTION_REJECT_DST)) && + !(PACKET_TEST_ACTION(p, ACTION_REJECT_BOTH))) { + return TM_ECODE_OK; + } + + if (PKT_IS_IPV4(p)) { + if (PKT_IS_TCP(p)) { + ret = RejectSendIPv4TCP(tv, p, data); + } else { + ret = RejectSendIPv4ICMP(tv, p, data); + } + } else if (PKT_IS_IPV6(p)) { + if (PKT_IS_TCP(p)) { + ret = RejectSendIPv6TCP(tv, p, data); + } else { + ret = RejectSendIPv6ICMP(tv, p, data); + } + } else { + /* we're only supporting IPv4 and IPv6 */ + return TM_ECODE_OK; + } + + if (ret) + return TM_ECODE_FAILED; + else + return TM_ECODE_OK; +} + +int RejectSendIPv4TCP(ThreadVars *tv, Packet *p, void *data) +{ + SCEnter(); + int r = 0; + if (PACKET_TEST_ACTION(p, ACTION_REJECT)) { + r = RejectSendLibnet11L3IPv4TCP(tv, p, data, REJECT_DIR_SRC); + SCReturnInt(r); + } else if (PACKET_TEST_ACTION(p, ACTION_REJECT_DST)) { + r = RejectSendLibnet11L3IPv4TCP(tv, p, data, REJECT_DIR_DST); + SCReturnInt(r); + } else if(PACKET_TEST_ACTION(p, ACTION_REJECT_BOTH)) { + int ret; + ret = RejectSendLibnet11L3IPv4TCP(tv, p, data, REJECT_DIR_SRC); + if (RejectSendLibnet11L3IPv4TCP(tv, p, data, REJECT_DIR_DST) == 0) { + SCReturnInt(0); + } else { + SCReturnInt(ret); + } + } + SCReturnInt(0); +} + +int RejectSendIPv4ICMP(ThreadVars *tv, Packet *p, void *data) +{ + SCEnter(); + int r = 0; + if (PACKET_TEST_ACTION(p, ACTION_REJECT)) { + r = RejectSendLibnet11L3IPv4ICMP(tv, p, data, REJECT_DIR_SRC); + SCReturnInt(r); + } else if (PACKET_TEST_ACTION(p, ACTION_REJECT_DST)) { + r = RejectSendLibnet11L3IPv4ICMP(tv, p, data, REJECT_DIR_DST); + SCReturnInt(r); + } else if(PACKET_TEST_ACTION(p, ACTION_REJECT_BOTH)) { + int ret; + ret = RejectSendLibnet11L3IPv4ICMP(tv, p, data, REJECT_DIR_SRC); + if (RejectSendLibnet11L3IPv4ICMP(tv, p, data, REJECT_DIR_DST) == 0) { + SCReturnInt(0); + } else { + SCReturnInt(ret); + } + } + SCReturnInt(0); +} + +int RejectSendIPv6TCP(ThreadVars *tv, Packet *p, void *data) +{ + SCEnter(); + int r = 0; + if (PACKET_TEST_ACTION(p, ACTION_REJECT)) { + r = RejectSendLibnet11L3IPv6TCP(tv, p, data, REJECT_DIR_SRC); + SCReturnInt(r); + } else if (PACKET_TEST_ACTION(p, ACTION_REJECT_DST)) { + r = RejectSendLibnet11L3IPv6TCP(tv, p, data, REJECT_DIR_DST); + SCReturnInt(r); + } else if(PACKET_TEST_ACTION(p, ACTION_REJECT_BOTH)) { + int ret; + ret = RejectSendLibnet11L3IPv6TCP(tv, p, data, REJECT_DIR_SRC); + if (RejectSendLibnet11L3IPv6TCP(tv, p, data, REJECT_DIR_DST) == 0) { + SCReturnInt(0); + } else { + SCReturnInt(ret); + } + } + SCReturnInt(0); +} + +int RejectSendIPv6ICMP(ThreadVars *tv, Packet *p, void *data) +{ + SCEnter(); + int r = 0; + if (PACKET_TEST_ACTION(p, ACTION_REJECT)) { + r = RejectSendLibnet11L3IPv6ICMP(tv, p, data, REJECT_DIR_SRC); + SCReturnInt(r); + } else if (PACKET_TEST_ACTION(p, ACTION_REJECT_DST)) { + r = RejectSendLibnet11L3IPv6ICMP(tv, p, data, REJECT_DIR_DST); + SCReturnInt(r); + } else if(PACKET_TEST_ACTION(p, ACTION_REJECT_BOTH)) { + int ret; + ret = RejectSendLibnet11L3IPv6ICMP(tv, p, data, REJECT_DIR_SRC); + if (RejectSendLibnet11L3IPv6ICMP(tv, p, data, REJECT_DIR_DST) == 0) { + SCReturnInt(0); + } else { + SCReturnInt(ret); + } + } + SCReturnInt(0); +} + |