--- /dev/null
+/* Copyright (C) 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 Philippe Antoine <p.antoine@catenacyber.fr>
+ *
+ */
+
+#include "suricata-common.h"
+
+#include "detect.h"
+#include "detect-parse.h"
+#include "detect-engine.h"
+#include "detect-engine-mpm.h"
+#include "detect-engine-prefilter.h"
+#include "detect-engine-content-inspection.h"
+#include "detect-fast-pattern.h"
+#include "detect-icmpv6hdr.h"
+
+/* prototypes */
+static int DetectICMPv6hdrSetup (DetectEngineCtx *, Signature *, const char *);
+#ifdef UNITTESTS
+void DetectICMPv6hdrRegisterTests (void);
+#endif
+
+static int g_icmpv6hdr_buffer_id = 0;
+
+static InspectionBuffer *GetData(DetectEngineThreadCtx *det_ctx,
+ const DetectEngineTransforms *transforms, Packet *p, const int list_id);
+
+/**
+ * \brief Registration function for icmpv6.hdr: keyword
+ */
+void DetectICMPv6hdrRegister(void)
+{
+ sigmatch_table[DETECT_ICMPV6HDR].name = "icmpv6.hdr";
+ sigmatch_table[DETECT_ICMPV6HDR].desc = "sticky buffer to match on the ICMP V6 header";
+ sigmatch_table[DETECT_ICMPV6HDR].url = DOC_URL DOC_VERSION "/rules/header-keywords.html#icmpv6hdr";
+ sigmatch_table[DETECT_ICMPV6HDR].Setup = DetectICMPv6hdrSetup;
+ sigmatch_table[DETECT_ICMPV6HDR].flags |= SIGMATCH_NOOPT | SIGMATCH_INFO_STICKY_BUFFER;
+#ifdef UNITTESTS
+ sigmatch_table[DETECT_ICMPV6HDR].RegisterTests = DetectICMPv6hdrRegisterTests;
+#endif
+
+ g_icmpv6hdr_buffer_id = DetectBufferTypeRegister("icmpv6.hdr");
+ BUG_ON(g_icmpv6hdr_buffer_id < 0);
+
+ DetectBufferTypeSupportsPacket("icmpv6.hdr");
+
+ DetectPktMpmRegister("icmpv6.hdr", 2, PrefilterGenericMpmPktRegister, GetData);
+
+ DetectPktInspectEngineRegister("icmpv6.hdr", GetData,
+ DetectEngineInspectPktBufferGeneric);
+
+ return;
+}
+
+/**
+ * \brief setup icmpv6.hdr sticky buffer
+ *
+ * \param de_ctx pointer to the Detection Engine Context
+ * \param s pointer to the Current Signature
+ * \param _unused unused
+ *
+ * \retval 0 on Success
+ * \retval -1 on Failure
+ */
+static int DetectICMPv6hdrSetup (DetectEngineCtx *de_ctx, Signature *s, const char *_unused)
+{
+ // ICMPv6 comes only with IPv6
+ s->proto.flags |= DETECT_PROTO_IPV6;
+ if (!(DetectProtoContainsProto(&s->proto, IPPROTO_ICMPV6)))
+ return -1;
+
+ s->flags |= SIG_FLAG_REQUIRE_PACKET;
+
+ if (DetectBufferSetActiveList(s, g_icmpv6hdr_buffer_id) < 0)
+ return -1;
+
+ return 0;
+}
+
+static InspectionBuffer *GetData(DetectEngineThreadCtx *det_ctx,
+ const DetectEngineTransforms *transforms, Packet *p, const int list_id)
+{
+ SCEnter();
+
+ InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
+ if (buffer->inspect == NULL) {
+ uint32_t hlen = ICMPV6_HEADER_LEN;
+ if (((uint8_t *)p->icmpv6h + (ptrdiff_t)hlen) >
+ ((uint8_t *)GET_PKT_DATA(p) + (ptrdiff_t)GET_PKT_LEN(p)))
+ {
+ SCLogDebug("data out of range: %p > %p",
+ ((uint8_t *)p->icmpv6h + (ptrdiff_t)hlen),
+ ((uint8_t *)GET_PKT_DATA(p) + (ptrdiff_t)GET_PKT_LEN(p)));
+ SCReturnPtr(NULL, "InspectionBuffer");
+ }
+
+ const uint32_t data_len = hlen;
+ const uint8_t *data = (const uint8_t *)p->icmpv6h;
+
+ InspectionBufferSetup(buffer, data, data_len);
+ InspectionBufferApplyTransforms(buffer, transforms);
+ }
+
+ SCReturnPtr(buffer, "InspectionBuffer");
+}
+
+#ifdef UNITTESTS
+#include "tests/detect-icmpv6hdr.c"
+#endif
--- /dev/null
+/* Copyright (C) 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 Philippe Antoine <p.antoine@catenacyber.fr>
+ */
+
+#ifndef _DETECT_ICMPV6HDR_H
+#define _DETECT_ICMPV6HDR_H
+
+void DetectICMPv6hdrRegister(void);
+
+#endif /* _DETECT_ICMPV6HDR_H */
--- /dev/null
+/* Copyright (C) 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.
+ */
+
+#include "../suricata-common.h"
+
+#include "../detect.h"
+#include "../detect-parse.h"
+#include "../detect-engine-prefilter-common.h"
+
+#include "../detect-icmpv6hdr.h"
+
+#include "../util-unittest.h"
+
+static int DetectICMPv6hdrParseTest01 (void)
+{
+ DetectEngineCtx *de_ctx = DetectEngineCtxInit();
+ FAIL_IF_NULL(de_ctx);
+
+ Signature *sig = DetectEngineAppendSig(de_ctx,
+ "alert ip any any -> any any (icmpv6.hdr; content:\"A\"; sid:1; rev:1;)");
+ FAIL_IF_NULL(sig);
+
+ DetectEngineCtxFree(de_ctx);
+ PASS;
+}
+
+/**
+ * \brief this function registers unit tests for DetectICMPv6hdr
+ */
+void DetectICMPv6hdrRegisterTests(void)
+{
+ UtRegisterTest("DetectICMPv6hdrParseTest01", DetectICMPv6hdrParseTest01);
+}
projects / thirdparty / suricata.git / commitdiff
