mirror of https://github.com/OISF/suricata
af-packet: basic support for AF_PACKET socket
This patch provides basic support for AF_PACKET socket. It is completed by a subsequent patches prodiding extended features and bugfixes.remotes/origin/master-1.1.x
Eric Leblond
14 years ago
committed by
Victor Julien
parent
5c8feb3851
commit
c45d898572
@ -0,0 +1,401 @@
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/* Copyright (C) 2011 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include "suricata-common.h"
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#include "tm-threads.h"
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#include "conf.h"
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#include "runmodes.h"
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#include "runmode-af-packet.h"
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#include "log-httplog.h"
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#include "output.h"
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#include "cuda-packet-batcher.h"
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#include "source-pfring.h"
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#include "detect-engine-mpm.h"
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#include "alert-fastlog.h"
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#include "alert-prelude.h"
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#include "alert-unified-log.h"
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#include "alert-unified-alert.h"
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#include "alert-unified2-alert.h"
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#include "alert-debuglog.h"
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#include "util-debug.h"
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#include "util-time.h"
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#include "util-cpu.h"
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#include "util-affinity.h"
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static const char *default_mode = NULL;
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const char *RunModeAFPGetDefaultMode(void)
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{
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return default_mode;
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}
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void RunModeIdsAFPRegister(void)
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{
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RunModeRegisterNewRunMode(RUNMODE_AFP_DEV, "auto",
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"Multi threaded af-packet mode",
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RunModeIdsAFPAuto);
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default_mode = "auto";
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return;
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}
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/**
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* \brief RunModeIdsAFPAuto set up the following thread packet handlers:
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* - Receive thread (from iface pcap)
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* - Decode thread
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* - Stream thread
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* - Detect: If we have only 1 cpu, it will setup one Detect thread
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* If we have more than one, it will setup num_cpus - 1
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* starting from the second cpu available.
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* - Respond/Reject thread
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* - Outputs thread
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* By default the threads will use the first cpu available
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* except the Detection threads if we have more than one cpu.
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*
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* \param de_ctx Pointer to the Detection Engine.
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*
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* \retval 0 If all goes well. (If any problem is detected the engine will
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* exit()).
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*/
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int RunModeIdsAFPAuto(DetectEngineCtx *de_ctx)
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{
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SCEnter();
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/* tname = Detect + cpuid, this is 11bytes length as max */
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char tname[16];
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uint16_t cpu = 0;
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TmModule *tm_module;
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uint16_t thread;
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RunModeInitialize();
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TimeModeSetLive();
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/* Available cpus */
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uint16_t ncpus = UtilCpuGetNumProcessorsOnline();
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/* TODO must not use PCAP function */
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int npcap = PcapLiveGetDeviceCount();
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if (npcap == 1) {
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char *pcap_dev = NULL;
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if (ConfGet("pcap.single_pcap_dev", &pcap_dev) == 0) {
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SCLogError(SC_ERR_RUNMODE, "Failed retrieving "
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"pcap.single_pcap_dev from Conf");
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exit(EXIT_FAILURE);
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}
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SCLogDebug("pcap_dev %s", pcap_dev);
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char *pcap_devc = SCStrdup(pcap_dev);
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/* create the threads */
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ThreadVars *tv_receivepcap =
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TmThreadCreatePacketHandler("ReceiveAFP",
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"packetpool", "packetpool",
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"pickup-queue", "simple",
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"1slot");
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if (tv_receivepcap == NULL) {
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printf("ERROR: TmThreadsCreate failed\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("ReceiveAFP");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName failed for ReceiveAFP\n");
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exit(EXIT_FAILURE);
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}
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Tm1SlotSetFunc(tv_receivepcap, tm_module, (void *)pcap_devc);
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TmThreadSetCPU(tv_receivepcap, RECEIVE_CPU_SET);
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if (TmThreadSpawn(tv_receivepcap) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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} else {
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SCLogInfo("Using %d pcap device(s).", npcap);
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for (thread = 0; thread < npcap; thread++) {
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char *pcap_dev = PcapLiveGetDevice(thread);
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if (pcap_dev == NULL) {
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printf("Failed to lookup pcap dev %d\n", thread);
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exit(EXIT_FAILURE);
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}
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SCLogDebug("pcap_dev %s", pcap_dev);
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snprintf(tname, sizeof(tname),"RecvPcap-%s", pcap_dev);
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char *tnamec = SCStrdup(tname);
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char *pcap_devc = SCStrdup(pcap_dev);
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/* create the threads */
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ThreadVars *tv_receiveafp =
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TmThreadCreatePacketHandler(tnamec,
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"packetpool", "packetpool",
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"pickup-queue", "simple",
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"1slot");
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if (tv_receiveafp == NULL) {
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printf("ERROR: TmThreadsCreate failed\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("ReceiveAFP");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName failed for ReceiveAFP\n");
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exit(EXIT_FAILURE);
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}
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Tm1SlotSetFunc(tv_receiveafp, tm_module, (void *)pcap_devc);
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TmThreadSetCPU(tv_receiveafp, RECEIVE_CPU_SET);
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if (TmThreadSpawn(tv_receiveafp) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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}
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}
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#if defined(__SC_CUDA_SUPPORT__)
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if (PatternMatchDefaultMatcher() == MPM_B2G_CUDA) {
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ThreadVars *tv_decode1 =
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TmThreadCreatePacketHandler("Decode",
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"pickup-queue", "simple",
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"decode-queue1", "simple",
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"1slot");
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if (tv_decode1 == NULL) {
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printf("ERROR: TmThreadsCreate failed for Decode1\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("DecodeAFP");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName DecodeAFP failed\n");
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exit(EXIT_FAILURE);
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}
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Tm1SlotSetFunc(tv_decode1, tm_module, NULL);
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TmThreadSetCPU(tv_decode1, DECODE_CPU_SET);
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if (TmThreadSpawn(tv_decode1) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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ThreadVars *tv_cuda_PB =
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TmThreadCreate("CUDA_PB",
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"decode-queue1", "simple",
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"cuda-pb-queue1", "simple",
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"custom", SCCudaPBTmThreadsSlot1, 0);
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if (tv_cuda_PB == NULL) {
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printf("ERROR: TmThreadsCreate failed for CUDA_PB\n");
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exit(EXIT_FAILURE);
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}
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tv_cuda_PB->type = TVT_PPT;
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tm_module = TmModuleGetByName("CudaPacketBatcher");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName CudaPacketBatcher failed\n");
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exit(EXIT_FAILURE);
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}
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Tm1SlotSetFunc(tv_cuda_PB, tm_module, (void *)de_ctx);
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TmThreadSetCPU(tv_cuda_PB, DETECT_CPU_SET);
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if (TmThreadSpawn(tv_cuda_PB) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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ThreadVars *tv_stream1 =
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TmThreadCreatePacketHandler("Stream1",
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"cuda-pb-queue1", "simple",
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"stream-queue1", "simple",
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"1slot");
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if (tv_stream1 == NULL) {
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printf("ERROR: TmThreadsCreate failed for Stream1\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("StreamTcp");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName StreamTcp failed\n");
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exit(EXIT_FAILURE);
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}
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Tm1SlotSetFunc(tv_stream1, tm_module, NULL);
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TmThreadSetCPU(tv_stream1, STREAM_CPU_SET);
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if (TmThreadSpawn(tv_stream1) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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} else {
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ThreadVars *tv_decode1 =
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TmThreadCreatePacketHandler("Decode & Stream",
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"pickup-queue", "simple",
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"stream-queue1", "simple",
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"varslot");
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if (tv_decode1 == NULL) {
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printf("ERROR: TmThreadsCreate failed for Decode1\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("DecodeAFP");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName DecodeAFP failed\n");
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exit(EXIT_FAILURE);
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}
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TmVarSlotSetFuncAppend(tv_decode1, tm_module, NULL);
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tm_module = TmModuleGetByName("StreamTcp");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName StreamTcp failed\n");
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exit(EXIT_FAILURE);
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}
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TmVarSlotSetFuncAppend(tv_decode1, tm_module, NULL);
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TmThreadSetCPU(tv_decode1, DECODE_CPU_SET);
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if (TmThreadSpawn(tv_decode1) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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}
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#else
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ThreadVars *tv_decode1 =
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TmThreadCreatePacketHandler("Decode & Stream",
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"pickup-queue", "simple",
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"stream-queue1", "simple",
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"varslot");
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if (tv_decode1 == NULL) {
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printf("ERROR: TmThreadsCreate failed for Decode1\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("DecodeAFP");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName DecodeAFP failed\n");
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exit(EXIT_FAILURE);
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}
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TmVarSlotSetFuncAppend(tv_decode1, tm_module, NULL);
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tm_module = TmModuleGetByName("StreamTcp");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName StreamTcp failed\n");
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exit(EXIT_FAILURE);
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}
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TmVarSlotSetFuncAppend(tv_decode1, tm_module, NULL);
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TmThreadSetCPU(tv_decode1, DECODE_CPU_SET);
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if (TmThreadSpawn(tv_decode1) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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#endif
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/* start with cpu 1 so that if we're creating an odd number of detect
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* threads we're not creating the most on CPU0. */
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if (ncpus > 0)
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cpu = 1;
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/* always create at least one thread */
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int thread_max = TmThreadGetNbThreads(DETECT_CPU_SET);
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if (thread_max == 0)
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thread_max = ncpus * threading_detect_ratio;
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if (thread_max < 1)
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thread_max = 1;
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for (thread = 0; thread < thread_max; thread++) {
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snprintf(tname, sizeof(tname),"Detect%"PRIu16, thread+1);
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char *thread_name = SCStrdup(tname);
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SCLogDebug("Assigning %s affinity to cpu %u", thread_name, cpu);
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ThreadVars *tv_detect_ncpu =
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TmThreadCreatePacketHandler(thread_name,
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"stream-queue1", "simple",
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"verdict-queue", "simple",
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"1slot");
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if (tv_detect_ncpu == NULL) {
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printf("ERROR: TmThreadsCreate failed\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("Detect");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName Detect failed\n");
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exit(EXIT_FAILURE);
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}
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Tm1SlotSetFunc(tv_detect_ncpu, tm_module, (void *)de_ctx);
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TmThreadSetCPU(tv_detect_ncpu, DETECT_CPU_SET);
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char *thread_group_name = SCStrdup("Detect");
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if (thread_group_name == NULL) {
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printf("Error allocating memory\n");
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exit(EXIT_FAILURE);
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}
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tv_detect_ncpu->thread_group_name = thread_group_name;
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if (TmThreadSpawn(tv_detect_ncpu) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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if ((cpu + 1) == ncpus)
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cpu = 0;
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else
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cpu++;
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}
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ThreadVars *tv_rreject =
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TmThreadCreatePacketHandler("RespondReject",
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"verdict-queue", "simple",
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"alert-queue", "simple",
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"1slot");
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if (tv_rreject == NULL) {
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printf("ERROR: TmThreadsCreate failed\n");
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exit(EXIT_FAILURE);
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}
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tm_module = TmModuleGetByName("RespondReject");
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if (tm_module == NULL) {
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printf("ERROR: TmModuleGetByName for RespondReject failed\n");
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exit(EXIT_FAILURE);
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}
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Tm1SlotSetFunc(tv_rreject, tm_module, NULL);
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TmThreadSetCPU(tv_rreject, REJECT_CPU_SET);
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if (TmThreadSpawn(tv_rreject) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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ThreadVars *tv_outputs =
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TmThreadCreatePacketHandler("Outputs",
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"alert-queue", "simple",
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"packetpool", "packetpool",
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"varslot");
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if (tv_outputs == NULL) {
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printf("ERROR: TmThreadCreatePacketHandler for Outputs failed\n");
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exit(EXIT_FAILURE);
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}
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SetupOutputs(tv_outputs);
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TmThreadSetCPU(tv_outputs, OUTPUT_CPU_SET);
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if (TmThreadSpawn(tv_outputs) != TM_ECODE_OK) {
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printf("ERROR: TmThreadSpawn failed\n");
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exit(EXIT_FAILURE);
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}
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return 0;
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}
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@ -0,0 +1,30 @@
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/* Copyright (C) 2011 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.
|
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*/
|
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|
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/** \file
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*
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* \author Eric Leblond <eric@regit.org>
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*/
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|
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#ifndef __RUNMODE_AFP_H__
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#define __RUNMODE_AFP_H__
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|
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int RunModeIdsAFPAuto(DetectEngineCtx *);
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void RunModeIdsAFPRegister(void);
|
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const char *RunModeAFPGetDefaultMode(void);
|
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|
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#endif /* __RUNMODE_AFP_H__ */
|
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@ -0,0 +1,646 @@
|
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/* Copyright (C) 2011 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.
|
||||
*/
|
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|
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/**
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* \file
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*
|
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* \author Eric Leblond <eric@regit.org>
|
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*
|
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* AF_PACKET socket acquisition support
|
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*
|
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* Fanouts socket from David Miller:
|
||||
* we need to support the split of flow in different socket
|
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* option:
|
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- packet_fanout type
|
||||
- fanout ID ?? seems it could be useful
|
||||
- protocol is the IEEE 802.3 protocol number in network order (filtering is great)
|
||||
- runmode -> family of threads in parallel (acccount)
|
||||
- add a new ratio or threads number (overwritten by cpu_affinity)
|
||||
- add af_max_read_packets for batched reading
|
||||
*
|
||||
* architecture
|
||||
* loop with read
|
||||
* code needed for iface name to int mapping
|
||||
* socket opening
|
||||
* socket call
|
||||
* bind
|
||||
* must switch to promiscous mode -> use PACKET_MR_PROMISC socket option
|
||||
*
|
||||
* \todo watch other interface event to detect suppression of the monitored interface
|
||||
*/
|
||||
|
||||
#include "suricata-common.h"
|
||||
#include "suricata.h"
|
||||
#include "decode.h"
|
||||
#include "packet-queue.h"
|
||||
#include "threads.h"
|
||||
#include "threadvars.h"
|
||||
#include "tm-queuehandlers.h"
|
||||
#include "tm-modules.h"
|
||||
#include "tm-threads.h"
|
||||
#include "tm-threads-common.h"
|
||||
#include "conf.h"
|
||||
#include "util-debug.h"
|
||||
#include "util-error.h"
|
||||
#include "util-privs.h"
|
||||
#include "tmqh-packetpool.h"
|
||||
#include "source-af-packet.h"
|
||||
|
||||
#include <sys/ioctl.h>
|
||||
#include <linux/if_ether.h>
|
||||
#include <linux/if_packet.h>
|
||||
#include <linux/if_arp.h>
|
||||
|
||||
extern uint8_t suricata_ctl_flags;
|
||||
extern int max_pending_packets;
|
||||
|
||||
/** control how many packets we may read in one go */
|
||||
static int afp_max_read_packets = 0;
|
||||
/** max packets < 65536 */
|
||||
#define AFP_FILE_MAX_PKTS 256
|
||||
#define AFP_IFACE_NAME_LENGTH 48
|
||||
|
||||
#define AFP_STATE_DOWN 0
|
||||
#define AFP_STATE_UP 1
|
||||
|
||||
#define AFP_RECONNECT_TIMEOUT 500000
|
||||
|
||||
#define POLL_TIMEOUT 100
|
||||
|
||||
#define AFP_BUFSIZE 4096
|
||||
|
||||
/**
|
||||
* \brief Structure to hold thread specific variables.
|
||||
*/
|
||||
typedef struct AFPThreadVars_
|
||||
{
|
||||
/* thread specific socket */
|
||||
int socket;
|
||||
/* handle state */
|
||||
unsigned char afp_state;
|
||||
char iface[AFP_IFACE_NAME_LENGTH];
|
||||
|
||||
/* data link type for the thread */
|
||||
int datalink;
|
||||
int cooked;
|
||||
|
||||
/* counters */
|
||||
uint32_t pkts;
|
||||
uint64_t bytes;
|
||||
uint32_t errs;
|
||||
|
||||
/* AFP buffer size */
|
||||
int AFP_buffer_size;
|
||||
|
||||
ThreadVars *tv;
|
||||
|
||||
Packet *in_p;
|
||||
|
||||
Packet *array[AFP_FILE_MAX_PKTS];
|
||||
uint16_t array_idx;
|
||||
|
||||
int fanout;
|
||||
|
||||
char *data; /** Per function and thread data */
|
||||
int datalen; /** Length of per function and thread data */
|
||||
} AFPThreadVars;
|
||||
|
||||
TmEcode ReceiveAFP(ThreadVars *, Packet *, void *, PacketQueue *, PacketQueue *);
|
||||
TmEcode ReceiveAFPThreadInit(ThreadVars *, void *, void **);
|
||||
void ReceiveAFPThreadExitStats(ThreadVars *, void *);
|
||||
TmEcode ReceiveAFPThreadDeinit(ThreadVars *, void *);
|
||||
|
||||
TmEcode DecodeAFPThreadInit(ThreadVars *, void *, void **);
|
||||
TmEcode DecodeAFP(ThreadVars *, Packet *, void *, PacketQueue *, PacketQueue *);
|
||||
|
||||
/**
|
||||
* \brief Registration Function for RecieveAFP.
|
||||
* \todo Unit tests are needed for this module.
|
||||
*/
|
||||
void TmModuleReceiveAFPRegister (void) {
|
||||
tmm_modules[TMM_RECEIVEAFP].name = "ReceiveAFP";
|
||||
tmm_modules[TMM_RECEIVEAFP].ThreadInit = ReceiveAFPThreadInit;
|
||||
tmm_modules[TMM_RECEIVEAFP].Func = ReceiveAFP;
|
||||
tmm_modules[TMM_RECEIVEAFP].ThreadExitPrintStats = ReceiveAFPThreadExitStats;
|
||||
tmm_modules[TMM_RECEIVEAFP].ThreadDeinit = NULL;
|
||||
tmm_modules[TMM_RECEIVEAFP].RegisterTests = NULL;
|
||||
tmm_modules[TMM_RECEIVEAFP].cap_flags = SC_CAP_NET_RAW;
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Registration Function for DecodeAFP.
|
||||
* \todo Unit tests are needed for this module.
|
||||
*/
|
||||
void TmModuleDecodeAFPRegister (void) {
|
||||
tmm_modules[TMM_DECODEAFP].name = "DecodeAFP";
|
||||
tmm_modules[TMM_DECODEAFP].ThreadInit = DecodeAFPThreadInit;
|
||||
tmm_modules[TMM_DECODEAFP].Func = DecodeAFP;
|
||||
tmm_modules[TMM_DECODEAFP].ThreadExitPrintStats = NULL;
|
||||
tmm_modules[TMM_DECODEAFP].ThreadDeinit = NULL;
|
||||
tmm_modules[TMM_DECODEAFP].RegisterTests = NULL;
|
||||
tmm_modules[TMM_DECODEAFP].cap_flags = 0;
|
||||
}
|
||||
|
||||
static int createsocket(AFPThreadVars *ptv, char *devname, int verbose);
|
||||
|
||||
/**
|
||||
* \brief AF packet read function.
|
||||
*
|
||||
* This function fills
|
||||
* From here the packets are picked up by the DecodeAFP thread.
|
||||
*
|
||||
* \param user pointer to AFPThreadVars
|
||||
* \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success
|
||||
*/
|
||||
TmEcode AFPRead(AFPThreadVars *ptv)
|
||||
{
|
||||
Packet *p = NULL;
|
||||
/* XXX should try to use read that get directly to packet */
|
||||
uint8_t buf[AFP_BUFSIZE];
|
||||
int offset = 0;
|
||||
int caplen;
|
||||
struct sockaddr_ll from;
|
||||
struct iovec iov;
|
||||
struct msghdr msg;
|
||||
#if 0
|
||||
struct cmsghdr *cmsg;
|
||||
union {
|
||||
struct cmsghdr cmsg;
|
||||
char buf[CMSG_SPACE(sizeof(struct tpacket_auxdata))];
|
||||
} cmsg_buf;
|
||||
#endif
|
||||
|
||||
msg.msg_name = &from;
|
||||
msg.msg_namelen = sizeof(from);
|
||||
msg.msg_iov = &iov;
|
||||
msg.msg_iovlen = 1;
|
||||
#if 0
|
||||
msg.msg_control = &cmsg_buf;
|
||||
msg.msg_controllen = sizeof(cmsg_buf);
|
||||
#endif
|
||||
msg.msg_flags = 0;
|
||||
|
||||
if (ptv->cooked)
|
||||
offset = SLL_HEADER_LEN;
|
||||
else
|
||||
offset = 0;
|
||||
iov.iov_len = AFP_BUFSIZE - offset;
|
||||
iov.iov_base = buf + offset;
|
||||
|
||||
caplen = recvmsg(ptv->socket, &msg, MSG_TRUNC);
|
||||
|
||||
if (caplen < 0) {
|
||||
SCLogWarning(SC_ERR_AFP_READ, "recvmsg failed with error code %" PRId32,
|
||||
errno);
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
if (ptv->array_idx == 0) {
|
||||
p = ptv->in_p;
|
||||
} else {
|
||||
p = PacketGetFromQueueOrAlloc();
|
||||
}
|
||||
|
||||
if (p == NULL) {
|
||||
TmqhOutputPacketpool(ptv->tv, p);
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
|
||||
/* get timestamp of packet via ioctl */
|
||||
if (ioctl(ptv->socket, SIOCGSTAMP, &p->ts) == -1) {
|
||||
SCLogWarning(SC_ERR_AFP_READ, "recvmsg failed with error code %" PRId32,
|
||||
errno);
|
||||
TmqhOutputPacketpool(ptv->tv, p);
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
|
||||
ptv->pkts++;
|
||||
ptv->bytes += caplen + offset;
|
||||
|
||||
/* add forged header */
|
||||
if (ptv->cooked) {
|
||||
SllHdr * hdrp = (SllHdr *)buf;
|
||||
/* XXX this is minimalist, but this seems enough */
|
||||
hdrp->sll_protocol = from.sll_protocol;
|
||||
}
|
||||
|
||||
p->datalink = ptv->datalink;
|
||||
SET_PKT_LEN(p, caplen + offset);
|
||||
if (PacketCopyData(p, buf, GET_PKT_LEN(p)) == -1) {
|
||||
TmqhOutputPacketpool(ptv->tv, p);
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
SCLogDebug("pktlen: %" PRIu32 " (pkt %02x, pkt data %02x)",
|
||||
GET_PKT_LEN(p), *pkt, *GET_PKT_DATA(p));
|
||||
|
||||
/* store the packet in our array */
|
||||
ptv->array[ptv->array_idx] = p;
|
||||
ptv->array_idx++;
|
||||
SCReturnInt(TM_ECODE_OK);
|
||||
}
|
||||
|
||||
static int AFPTryReopen(AFPThreadVars *ptv)
|
||||
{
|
||||
int afp_activate_r;
|
||||
|
||||
ptv->afp_state = AFP_STATE_DOWN;
|
||||
|
||||
afp_activate_r = createsocket(ptv, ptv->iface, 0);
|
||||
if (afp_activate_r != 0) {
|
||||
return afp_activate_r;
|
||||
}
|
||||
|
||||
SCLogInfo("Recovering interface listening");
|
||||
ptv->afp_state = AFP_STATE_UP;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief Recieves packets from an interface via AF_PACKET socket
|
||||
*
|
||||
* This function recieves packets from an interface and passes
|
||||
* the packet on to the AFP callback function.
|
||||
*
|
||||
* \param tv pointer to ThreadVars
|
||||
* \param data pointer that gets cast into AFPThreadVars for ptv
|
||||
* \param pq pointer to the PacketQueue (not used here but part of the api)
|
||||
* \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success
|
||||
*/
|
||||
TmEcode ReceiveAFP(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq) {
|
||||
SCEnter();
|
||||
uint16_t packet_q_len = 0;
|
||||
struct pollfd fds;
|
||||
TmEcode ret;
|
||||
uint16_t cnt = 0;
|
||||
|
||||
AFPThreadVars *ptv = (AFPThreadVars *)data;
|
||||
|
||||
/* test AFP handle */
|
||||
if (ptv->afp_state == AFP_STATE_DOWN) {
|
||||
int r;
|
||||
do {
|
||||
usleep(AFP_RECONNECT_TIMEOUT);
|
||||
if (suricata_ctl_flags != 0) {
|
||||
break;
|
||||
}
|
||||
r = AFPTryReopen(ptv);
|
||||
} while (r < 0);
|
||||
}
|
||||
|
||||
/* make sure we have at least one packet in the packet pool, to prevent
|
||||
* us from alloc'ing packets at line rate */
|
||||
while (packet_q_len == 0) {
|
||||
packet_q_len = PacketPoolSize();
|
||||
if (packet_q_len == 0) {
|
||||
PacketPoolWait();
|
||||
}
|
||||
}
|
||||
|
||||
if (postpq == NULL)
|
||||
afp_max_read_packets = 1;
|
||||
|
||||
ptv->array_idx = 0;
|
||||
ptv->in_p = p;
|
||||
|
||||
fds.fd = ptv->socket;
|
||||
fds.events = POLLIN;
|
||||
|
||||
int r = 0;
|
||||
while (r >= 0) {
|
||||
r = poll(&fds, 1, POLL_TIMEOUT);
|
||||
|
||||
if (r > 0) {
|
||||
|
||||
ret = AFPRead(ptv);
|
||||
if (ret != TM_ECODE_OK) {
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
if (suricata_ctl_flags != 0) {
|
||||
break;
|
||||
}
|
||||
if (cnt++ >= afp_max_read_packets)
|
||||
break;
|
||||
}
|
||||
if (r < 0) {
|
||||
int dbreak = 0;
|
||||
SCLogError(SC_ERR_AFP_READ, "Error reading data from socket: (%d" PRIu32 ") %s",
|
||||
errno, strerror(errno));
|
||||
do {
|
||||
usleep(AFP_RECONNECT_TIMEOUT);
|
||||
if (suricata_ctl_flags != 0) {
|
||||
dbreak = 1;
|
||||
break;
|
||||
}
|
||||
r = AFPTryReopen(ptv);
|
||||
} while (r < 0);
|
||||
if (dbreak) {
|
||||
r = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if ( r == 0) {
|
||||
if (suricata_ctl_flags != 0) {
|
||||
break;
|
||||
}
|
||||
if (cnt > 0)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
for (cnt = 0; cnt < ptv->array_idx; cnt++) {
|
||||
Packet *pp = ptv->array[cnt];
|
||||
|
||||
/* enqueue all but the first in the postpq, the first
|
||||
* pkt is handled by the tv "out handler" */
|
||||
if (cnt > 0) {
|
||||
PacketEnqueue(postpq, pp);
|
||||
}
|
||||
}
|
||||
|
||||
if (r < 0) {
|
||||
SCLogError(SC_ERR_AFP_DISPATCH, "error code %" PRId32,
|
||||
r);
|
||||
|
||||
SCReturnInt(TM_ECODE_OK);
|
||||
}
|
||||
|
||||
if (suricata_ctl_flags != 0) {
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
|
||||
SCReturnInt(TM_ECODE_OK);
|
||||
}
|
||||
|
||||
static int getifnumbydev(int fd, const char *ifname, int verbose)
|
||||
{
|
||||
struct ifreq ifr;
|
||||
|
||||
memset(&ifr, 0, sizeof(ifr));
|
||||
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
|
||||
|
||||
if (ioctl(fd, SIOCGIFINDEX, &ifr) == -1) {
|
||||
if (verbose)
|
||||
SCLogError(SC_ERR_AFP_CREATE, "Unable to find iface %s: %s",
|
||||
ifname, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
return ifr.ifr_ifindex;
|
||||
}
|
||||
|
||||
static int getdevlinktype(int fd, const char *ifname)
|
||||
{
|
||||
struct ifreq ifr;
|
||||
|
||||
memset(&ifr, 0, sizeof(ifr));
|
||||
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
|
||||
|
||||
if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1) {
|
||||
SCLogError(SC_ERR_AFP_CREATE, "Unable to find type for iface \"%s\": %s",
|
||||
ifname, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
return ifr.ifr_hwaddr.sa_family;
|
||||
}
|
||||
|
||||
static int createsocket(AFPThreadVars *ptv, char *devname, int verbose)
|
||||
{
|
||||
int r;
|
||||
struct packet_mreq sock_params;
|
||||
struct sockaddr_ll bind_address;
|
||||
/* open socket */
|
||||
ptv->socket = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
|
||||
if (ptv->socket == -1) {
|
||||
SCLogError(SC_ERR_AFP_CREATE, "Coudn't create a AF_PACKET socket, error %s", strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
SCLogInfo("using interface %s", (char *)devname);
|
||||
/* bind socket */
|
||||
memset(&bind_address, 0, sizeof(bind_address));
|
||||
bind_address.sll_family = AF_PACKET;
|
||||
bind_address.sll_protocol = htons(ETH_P_ALL);
|
||||
bind_address.sll_ifindex = getifnumbydev(ptv->socket, devname, verbose);
|
||||
if (bind_address.sll_ifindex == -1) {
|
||||
if (verbose)
|
||||
SCLogError(SC_ERR_AFP_CREATE, "Coudn't find iface %s", devname);
|
||||
return -1;
|
||||
}
|
||||
r = bind(ptv->socket, (struct sockaddr *)&bind_address, sizeof(bind_address));
|
||||
if (r < 0) {
|
||||
if (verbose) {
|
||||
if (errno == ENETDOWN) {
|
||||
SCLogError(SC_ERR_AFP_CREATE,
|
||||
"Couldn't bind AF_PACKET socket, iface %s is down",
|
||||
devname);
|
||||
} else {
|
||||
SCLogError(SC_ERR_AFP_CREATE,
|
||||
"Couldn't bind AF_PACKET socket to iface %s, error %s",
|
||||
devname,
|
||||
strerror(errno));
|
||||
}
|
||||
}
|
||||
close(ptv->socket);
|
||||
return -1;
|
||||
}
|
||||
/* Force promiscuous mode */
|
||||
memset(&sock_params, 0, sizeof(sock_params));
|
||||
sock_params.mr_type = PACKET_MR_PROMISC;
|
||||
sock_params.mr_ifindex = bind_address.sll_ifindex;
|
||||
r = setsockopt(ptv->socket, SOL_PACKET, PACKET_ADD_MEMBERSHIP,(void *)&sock_params, sizeof(sock_params));
|
||||
if (r < 0) {
|
||||
SCLogError(SC_ERR_AFP_CREATE,
|
||||
"Coudn't switch iface %s to promiscuous, error %s",
|
||||
devname,
|
||||
strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
#ifdef HAVE_PACKET_FANOUT
|
||||
/* add binded socket to fanout group */
|
||||
if (ptv->fanout) {
|
||||
uint32_t option = 0;
|
||||
uint16_t mode = PACKET_FANOUT_HASH;
|
||||
uint16_t id = 1;
|
||||
option = (mode << 16) | (id & 0xffff);
|
||||
r = setsockopt(ptv->socket, SOL_PACKET, PACKET_FANOUT,(void *)&option, sizeof(option));
|
||||
if (r < 0) {
|
||||
SCLogError(SC_ERR_AFP_CREATE,
|
||||
"Coudn't set fanout mode, error %s",
|
||||
strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
ptv->afp_state = AFP_STATE_UP;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* \brief Init function for ReceiveAFP.
|
||||
*
|
||||
* \param tv pointer to ThreadVars
|
||||
* \param initdata pointer to the interface passed from the user
|
||||
* \param data pointer gets populated with AFPThreadVars
|
||||
*
|
||||
* \todo Create a general AFP setup function.
|
||||
*/
|
||||
TmEcode ReceiveAFPThreadInit(ThreadVars *tv, void *initdata, void **data) {
|
||||
SCEnter();
|
||||
int r;
|
||||
int value;
|
||||
|
||||
/* use max_pending_packets as AFP read size unless it's bigger than
|
||||
* our size limit */
|
||||
afp_max_read_packets = (AFP_FILE_MAX_PKTS < max_pending_packets) ?
|
||||
AFP_FILE_MAX_PKTS : max_pending_packets;
|
||||
|
||||
if (initdata == NULL) {
|
||||
SCLogError(SC_ERR_INVALID_ARGUMENT, "initdata == NULL");
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
|
||||
AFPThreadVars *ptv = SCMalloc(sizeof(AFPThreadVars));
|
||||
if (ptv == NULL)
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
memset(ptv, 0, sizeof(AFPThreadVars));
|
||||
|
||||
ptv->tv = tv;
|
||||
ptv->cooked = 0;
|
||||
|
||||
strncpy(ptv->iface, initdata, AFP_IFACE_NAME_LENGTH);
|
||||
ptv->iface[AFP_IFACE_NAME_LENGTH - 1]= '\0';
|
||||
|
||||
r = createsocket(ptv, initdata, 1);
|
||||
if (r < 0) {
|
||||
SCLogError(SC_ERR_AFP_CREATE, "Coudn't init AF_PACKET socket");
|
||||
SCFree(ptv);
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
}
|
||||
|
||||
ptv->datalink = getdevlinktype(ptv->socket, ptv->iface);
|
||||
switch (ptv->datalink) {
|
||||
case ARPHRD_PPP:
|
||||
case ARPHRD_ATM:
|
||||
ptv->cooked = 1;
|
||||
}
|
||||
|
||||
if ((ConfGetBool("af-packet.fanout", &value)) == 1) {
|
||||
ptv->fanout = value;
|
||||
} else {
|
||||
ptv->fanout = 0;
|
||||
}
|
||||
|
||||
*data = (void *)ptv;
|
||||
SCReturnInt(TM_ECODE_OK);
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief This function prints stats to the screen at exit.
|
||||
* \param tv pointer to ThreadVars
|
||||
* \param data pointer that gets cast into AFPThreadVars for ptv
|
||||
*/
|
||||
void ReceiveAFPThreadExitStats(ThreadVars *tv, void *data) {
|
||||
SCEnter();
|
||||
AFPThreadVars *ptv = (AFPThreadVars *)data;
|
||||
/**
|
||||
* \todo Counter output
|
||||
*/
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief DeInit function closes af packet socket at exit.
|
||||
* \param tv pointer to ThreadVars
|
||||
* \param data pointer that gets cast into AFPThreadVars for ptv
|
||||
*/
|
||||
TmEcode ReceiveAFPThreadDeinit(ThreadVars *tv, void *data) {
|
||||
AFPThreadVars *ptv = (AFPThreadVars *)data;
|
||||
|
||||
close(ptv->socket);
|
||||
SCReturnInt(TM_ECODE_OK);
|
||||
}
|
||||
|
||||
/**
|
||||
* \brief This function passes off to link type decoders.
|
||||
*
|
||||
* DecodeAFP reads packets from the PacketQueue and passes
|
||||
* them off to the proper link type decoder.
|
||||
*
|
||||
* \param t pointer to ThreadVars
|
||||
* \param p pointer to the current packet
|
||||
* \param data pointer that gets cast into AFPThreadVars for ptv
|
||||
* \param pq pointer to the current PacketQueue
|
||||
*/
|
||||
TmEcode DecodeAFP(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
|
||||
{
|
||||
SCEnter();
|
||||
DecodeThreadVars *dtv = (DecodeThreadVars *)data;
|
||||
|
||||
/* update counters */
|
||||
SCPerfCounterIncr(dtv->counter_pkts, tv->sc_perf_pca);
|
||||
SCPerfCounterIncr(dtv->counter_pkts_per_sec, tv->sc_perf_pca);
|
||||
|
||||
SCPerfCounterAddUI64(dtv->counter_bytes, tv->sc_perf_pca, GET_PKT_LEN(p));
|
||||
#if 0
|
||||
SCPerfCounterAddDouble(dtv->counter_bytes_per_sec, tv->sc_perf_pca, GET_PKT_LEN(p));
|
||||
SCPerfCounterAddDouble(dtv->counter_mbit_per_sec, tv->sc_perf_pca,
|
||||
(GET_PKT_LEN(p) * 8)/1000000.0);
|
||||
#endif
|
||||
|
||||
SCPerfCounterAddUI64(dtv->counter_avg_pkt_size, tv->sc_perf_pca, GET_PKT_LEN(p));
|
||||
SCPerfCounterSetUI64(dtv->counter_max_pkt_size, tv->sc_perf_pca, GET_PKT_LEN(p));
|
||||
|
||||
/* call the decoder */
|
||||
switch(p->datalink) {
|
||||
case LINKTYPE_LINUX_SLL:
|
||||
DecodeSll(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
|
||||
break;
|
||||
case LINKTYPE_ETHERNET:
|
||||
DecodeEthernet(tv, dtv, p,GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
|
||||
break;
|
||||
case LINKTYPE_PPP:
|
||||
DecodePPP(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
|
||||
break;
|
||||
case LINKTYPE_RAW:
|
||||
DecodeRaw(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
|
||||
break;
|
||||
default:
|
||||
SCLogError(SC_ERR_DATALINK_UNIMPLEMENTED, "Error: datalink type %" PRId32 " not yet supported in module DecodeAFP", p->datalink);
|
||||
break;
|
||||
}
|
||||
|
||||
SCReturnInt(TM_ECODE_OK);
|
||||
}
|
||||
|
||||
TmEcode DecodeAFPThreadInit(ThreadVars *tv, void *initdata, void **data)
|
||||
{
|
||||
SCEnter();
|
||||
DecodeThreadVars *dtv = NULL;
|
||||
|
||||
dtv = DecodeThreadVarsAlloc();
|
||||
|
||||
if (dtv == NULL)
|
||||
SCReturnInt(TM_ECODE_FAILED);
|
||||
|
||||
DecodeRegisterPerfCounters(dtv, tv);
|
||||
|
||||
*data = (void *)dtv;
|
||||
|
||||
SCReturnInt(TM_ECODE_OK);
|
||||
}
|
||||
|
||||
/* eof */
|
||||
@ -0,0 +1,30 @@
|
||||
/* Copyright (C) 2011 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 Eric Leblond <eric@regit.org>
|
||||
*/
|
||||
|
||||
#ifndef __SOURCE_AFP_H__
|
||||
#define __SOURCE_AFP_H__
|
||||
|
||||
void TmModuleReceiveAFPRegister (void);
|
||||
void TmModuleDecodeAFPRegister (void);
|
||||
|
||||
#endif /* __SOURCE_AFP_H__ */
|
||||
Loading…
Reference in New Issue