suricata checkin based on commit id a4bce14770beee46a537eda3c3f6e8e8565d5d0a

Change-Id: I9a214fa0ee95e58fc640e50bd604dac7f42db48f

1 files changed, 218 insertions, 0 deletions

diff --git a/framework/src/suricata/src/decode-udp.c b/framework/src/suricata/src/decode-udp.c
new file mode 100644
index 00000000..14ba7887
--- /dev/null
+++ b/framework/src/suricata/src/decode-udp.c
@@ -0,0 +1,218 @@
+/* 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.
+ */
+
+/**
+ * \ingroup decode
+ *
+ * @{
+ */
+
+
+/**
+ * \file
+ *
+ * \author Victor Julien <victor@inliniac.net>
+ *
+ * Decode UDP
+ */
+
+#include "suricata-common.h"
+#include "decode.h"
+#include "decode-udp.h"
+#include "decode-teredo.h"
+#include "decode-events.h"
+#include "util-unittest.h"
+#include "util-debug.h"
+#include "flow.h"
+#include "app-layer.h"
+
+static int DecodeUDPPacket(ThreadVars *t, Packet *p, uint8_t *pkt, uint16_t len)
+{
+    if (unlikely(len < UDP_HEADER_LEN)) {
+        ENGINE_SET_INVALID_EVENT(p, UDP_HLEN_TOO_SMALL);
+        return -1;
+    }
+
+    p->udph = (UDPHdr *)pkt;
+
+    if (unlikely(len < UDP_GET_LEN(p))) {
+        ENGINE_SET_INVALID_EVENT(p, UDP_PKT_TOO_SMALL);
+        return -1;
+    }
+
+    if (unlikely(len != UDP_GET_LEN(p))) {
+        ENGINE_SET_INVALID_EVENT(p, UDP_HLEN_INVALID);
+        return -1;
+    }
+
+    SET_UDP_SRC_PORT(p,&p->sp);
+    SET_UDP_DST_PORT(p,&p->dp);
+
+    p->payload = pkt + UDP_HEADER_LEN;
+    p->payload_len = len - UDP_HEADER_LEN;
+
+    p->proto = IPPROTO_UDP;
+
+    return 0;
+}
+
+int DecodeUDP(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t len, PacketQueue *pq)
+{
+    StatsIncr(tv, dtv->counter_udp);
+
+    if (unlikely(DecodeUDPPacket(tv, p,pkt,len) < 0)) {
+        p->udph = NULL;
+        return TM_ECODE_FAILED;
+    }
+
+    SCLogDebug("UDP sp: %" PRIu32 " -> dp: %" PRIu32 " - HLEN: %" PRIu32 " LEN: %" PRIu32 "",
+        UDP_GET_SRC_PORT(p), UDP_GET_DST_PORT(p), UDP_HEADER_LEN, p->payload_len);
+
+    if (unlikely(DecodeTeredo(tv, dtv, p, p->payload, p->payload_len, pq) == TM_ECODE_OK)) {
+        /* Here we have a Teredo packet and don't need to handle app
+         * layer */
+        FlowHandlePacket(tv, dtv, p);
+        return TM_ECODE_OK;
+    }
+
+    /* Flow is an integral part of us */
+    FlowHandlePacket(tv, dtv, p);
+
+    /* handle the app layer part of the UDP packet payload */
+    if (unlikely(p->flow != NULL)) {
+        AppLayerHandleUdp(tv, dtv->app_tctx, p, p->flow);
+    }
+
+    return TM_ECODE_OK;
+}
+
+#ifdef UNITTESTS
+static int UDPV4CalculateValidChecksumtest01(void)
+{
+    uint16_t csum = 0;
+
+    uint8_t raw_ipshdr[] = {
+        0xd0, 0x43, 0xdc, 0xdc, 0xc0, 0xa8, 0x01, 0x3};
+
+    uint8_t raw_udp[] = {
+        0x00, 0x35, 0xcf, 0x34, 0x00, 0x55, 0x6c, 0xe0,
+        0x83, 0xfc, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
+        0x00, 0x00, 0x00, 0x00, 0x07, 0x70, 0x61, 0x67,
+        0x65, 0x61, 0x64, 0x32, 0x11, 0x67, 0x6f, 0x6f,
+        0x67, 0x6c, 0x65, 0x73, 0x79, 0x6e, 0x64, 0x69,
+        0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x03, 0x63,
+        0x6f, 0x6d, 0x00, 0x00, 0x1c, 0x00, 0x01, 0xc0,
+        0x0c, 0x00, 0x05, 0x00, 0x01, 0x00, 0x01, 0x4b,
+        0x50, 0x00, 0x12, 0x06, 0x70, 0x61, 0x67, 0x65,
+        0x61, 0x64, 0x01, 0x6c, 0x06, 0x67, 0x6f, 0x6f,
+        0x67, 0x6c, 0x65, 0xc0, 0x26};
+
+    csum = *( ((uint16_t *)raw_udp) + 3);
+
+    return (csum == UDPV4CalculateChecksum((uint16_t *) raw_ipshdr,
+                                           (uint16_t *)raw_udp,
+                                           sizeof(raw_udp)));
+}
+
+static int UDPV4CalculateInvalidChecksumtest02(void)
+{
+    uint16_t csum = 0;
+
+    uint8_t raw_ipshdr[] = {
+        0xd0, 0x43, 0xdc, 0xdc, 0xc0, 0xa8, 0x01, 0x3};
+
+    uint8_t raw_udp[] = {
+        0x00, 0x35, 0xcf, 0x34, 0x00, 0x55, 0x6c, 0xe0,
+        0x83, 0xfc, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
+        0x00, 0x00, 0x00, 0x00, 0x07, 0x70, 0x61, 0x67,
+        0x65, 0x61, 0x64, 0x32, 0x11, 0x67, 0x6f, 0x6f,
+        0x67, 0x6c, 0x65, 0x73, 0x79, 0x6e, 0x64, 0x69,
+        0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x03, 0x63,
+        0x6f, 0x6d, 0x00, 0x00, 0x1c, 0x00, 0x01, 0xc0,
+        0x0c, 0x00, 0x05, 0x00, 0x01, 0x00, 0x01, 0x4b,
+        0x50, 0x00, 0x12, 0x06, 0x70, 0x61, 0x67, 0x65,
+        0x61, 0x64, 0x01, 0x6c, 0x06, 0x67, 0x6f, 0x6f,
+        0x67, 0x6c, 0x65, 0xc0, 0x27};
+
+    csum = *( ((uint16_t *)raw_udp) + 3);
+
+    return (csum == UDPV4CalculateChecksum((uint16_t *) raw_ipshdr,
+                                           (uint16_t *)raw_udp,
+                                           sizeof(raw_udp)));
+}
+
+static int UDPV6CalculateValidChecksumtest03(void)
+{
+    uint16_t csum = 0;
+
+    static uint8_t raw_ipv6[] = {
+        0x00, 0x60, 0x97, 0x07, 0x69, 0xea, 0x00, 0x00,
+        0x86, 0x05, 0x80, 0xda, 0x86, 0xdd, 0x60, 0x00,
+        0x00, 0x00, 0x00, 0x14, 0x11, 0x02, 0x3f, 0xfe,
+        0x05, 0x07, 0x00, 0x00, 0x00, 0x01, 0x02, 0x00,
+        0x86, 0xff, 0xfe, 0x05, 0x80, 0xda, 0x3f, 0xfe,
+        0x05, 0x01, 0x04, 0x10, 0x00, 0x00, 0x02, 0xc0,
+        0xdf, 0xff, 0xfe, 0x47, 0x03, 0x3e, 0xa0, 0x75,
+        0x82, 0xa0, 0x00, 0x14, 0x1a, 0xc3, 0x06, 0x02,
+        0x00, 0x00, 0xf9, 0xc8, 0xe7, 0x36, 0x57, 0xb0,
+        0x09, 0x00};
+
+    csum = *( ((uint16_t *)(raw_ipv6 + 60)));
+
+    return (csum == UDPV6CalculateChecksum((uint16_t *)(raw_ipv6 + 14 + 8),
+                                           (uint16_t *)(raw_ipv6 + 54), 20));
+}
+
+static int UDPV6CalculateInvalidChecksumtest04(void)
+{
+    uint16_t csum = 0;
+
+    static uint8_t raw_ipv6[] = {
+        0x00, 0x60, 0x97, 0x07, 0x69, 0xea, 0x00, 0x00,
+        0x86, 0x05, 0x80, 0xda, 0x86, 0xdd, 0x60, 0x00,
+        0x00, 0x00, 0x00, 0x14, 0x11, 0x02, 0x3f, 0xfe,
+        0x05, 0x07, 0x00, 0x00, 0x00, 0x01, 0x02, 0x00,
+        0x86, 0xff, 0xfe, 0x05, 0x80, 0xda, 0x3f, 0xfe,
+        0x05, 0x01, 0x04, 0x10, 0x00, 0x00, 0x02, 0xc0,
+        0xdf, 0xff, 0xfe, 0x47, 0x03, 0x3e, 0xa0, 0x75,
+        0x82, 0xa0, 0x00, 0x14, 0x1a, 0xc3, 0x06, 0x02,
+        0x00, 0x00, 0xf9, 0xc8, 0xe7, 0x36, 0x57, 0xb0,
+        0x09, 0x01};
+
+    csum = *( ((uint16_t *)(raw_ipv6 + 60)));
+
+    return (csum == UDPV6CalculateChecksum((uint16_t *)(raw_ipv6 + 14 + 8),
+                                           (uint16_t *)(raw_ipv6 + 54), 20));
+}
+#endif /* UNITTESTS */
+
+void DecodeUDPV4RegisterTests(void)
+{
+#ifdef UNITTESTS
+    UtRegisterTest("UDPV4CalculateValidChecksumtest01",
+                   UDPV4CalculateValidChecksumtest01, 1);
+    UtRegisterTest("UDPV4CalculateInvalidChecksumtest02",
+                   UDPV4CalculateInvalidChecksumtest02, 0);
+    UtRegisterTest("UDPV6CalculateValidChecksumtest03",
+                   UDPV6CalculateValidChecksumtest03, 1);
+    UtRegisterTest("UDPV6CalculateInvalidChecksumtest04",
+                   UDPV6CalculateInvalidChecksumtest04, 0);
+#endif /* UNITTESTS */
+}
+/**
+ * @}
+ */