mirror of https://github.com/OISF/suricata
netmap support
gureedo
11 years ago
parent
cbe934267e
commit
10104066e1
@ -0,0 +1,439 @@
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/* Copyright (C) 2014 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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/**
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* \ingroup netmap
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*
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* @{
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*/
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/**
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* \file
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*
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* \author Aleksey Katargin <gureedo@gmail.com>
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*
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* Netmap runmode
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*
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*/
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#include "suricata-common.h"
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#include "config.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-netmap.h"
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#include "log-httplog.h"
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#include "output.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-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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#include "util-device.h"
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#include "util-runmodes.h"
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#include "util-ioctl.h"
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#include "source-netmap.h"
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extern int max_pending_packets;
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static const char *default_mode_workers = NULL;
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const char *RunModeNetmapGetDefaultMode(void)
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{
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return default_mode_workers;
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}
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void RunModeIdsNetmapRegister(void)
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{
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RunModeRegisterNewRunMode(RUNMODE_NETMAP, "single",
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"Single threaded netmap mode",
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RunModeIdsNetmapSingle);
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RunModeRegisterNewRunMode(RUNMODE_NETMAP, "workers",
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"Workers netmap mode, each thread does all"
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" tasks from acquisition to logging",
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RunModeIdsNetmapWorkers);
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default_mode_workers = "workers";
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RunModeRegisterNewRunMode(RUNMODE_NETMAP, "autofp",
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"Multi threaded netmap mode. Packets from "
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"each flow are assigned to a single detect "
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"thread.",
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RunModeIdsNetmapAutoFp);
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return;
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}
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#ifdef HAVE_NETMAP
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static void NetmapDerefConfig(void *conf)
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{
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NetmapIfaceConfig *pfp = (NetmapIfaceConfig *)conf;
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/* config is used only once but cost of this low. */
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if (SC_ATOMIC_SUB(pfp->ref, 1) == 0) {
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SCFree(pfp);
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}
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}
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/**
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* \brief extract information from config file
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*
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* The returned structure will be freed by the thread init function.
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* This is thus necessary to or copy the structure before giving it
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* to thread or to reparse the file for each thread (and thus have
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* new structure.
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*
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* \return a NetmapIfaceConfig corresponding to the interface name
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*/
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static void *ParseNetmapConfig(const char *iface)
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{
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char *threadsstr = NULL;
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ConfNode *if_root;
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ConfNode *if_default = NULL;
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ConfNode *netmap_node;
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NetmapIfaceConfig *aconf = SCMalloc(sizeof(*aconf));
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char *tmpctype;
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char *copymodestr;
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int boolval;
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char *bpf_filter = NULL;
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char *out_iface = NULL;
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if (unlikely(aconf == NULL)) {
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return NULL;
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}
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if (iface == NULL) {
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SCFree(aconf);
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return NULL;
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}
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memset(aconf, 0, sizeof(*aconf));
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strlcpy(aconf->iface, iface, sizeof(aconf->iface));
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SC_ATOMIC_INIT(aconf->ref);
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(void) SC_ATOMIC_ADD(aconf->ref, 1);
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aconf->DerefFunc = NetmapDerefConfig;
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aconf->threads = 1;
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aconf->promisc = 1;
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aconf->checksum_mode = CHECKSUM_VALIDATION_AUTO;
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aconf->copy_mode = NETMAP_COPY_MODE_NONE;
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if (ConfGet("bpf-filter", &bpf_filter) == 1) {
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if (strlen(bpf_filter) > 0) {
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aconf->bpf_filter = bpf_filter;
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SCLogInfo("Going to use command-line provided bpf filter '%s'",
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aconf->bpf_filter);
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}
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}
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/* Find initial node */
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netmap_node = ConfGetNode("netmap");
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if (netmap_node == NULL) {
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SCLogInfo("Unable to find netmap config using default value");
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return aconf;
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}
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if_root = ConfNodeLookupKeyValue(netmap_node, "interface", iface);
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if_default = ConfNodeLookupKeyValue(netmap_node, "interface", "default");
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if (if_root == NULL && if_default == NULL) {
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SCLogInfo("Unable to find netmap config for "
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"interface \"%s\" or \"default\", using default value",
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iface);
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return aconf;
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}
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/* If there is no setting for current interface use default one as main iface */
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if (if_root == NULL) {
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if_root = if_default;
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if_default = NULL;
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}
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if (ConfGetChildValueWithDefault(if_root, if_default, "threads", &threadsstr) != 1) {
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aconf->threads = 1;
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} else {
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if (strcmp(threadsstr, "auto") == 0) {
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aconf->threads = GetIfaceRSSQueuesNum(iface);
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} else {
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aconf->threads = (uint8_t)atoi(threadsstr);
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}
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}
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if (aconf->threads <= 0) {
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aconf->threads = 1;
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}
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if (aconf->threads) {
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SCLogInfo("Using %d threads for interface %s", aconf->threads, iface);
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}
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if (ConfGetChildValueWithDefault(if_root, if_default, "copy-iface", &out_iface) == 1) {
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if (strlen(out_iface) > 0) {
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aconf->out_iface = out_iface;
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}
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}
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if (ConfGetChildValueWithDefault(if_root, if_default, "copy-mode", ©modestr) == 1) {
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if (aconf->out_iface == NULL) {
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SCLogInfo("Copy mode activated but no destination"
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" iface. Disabling feature");
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} else if (strlen(copymodestr) <= 0) {
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aconf->out_iface = NULL;
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} else if (strcmp(copymodestr, "ips") == 0) {
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SCLogInfo("Netmap IPS mode activated %s->%s",
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iface,
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aconf->out_iface);
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aconf->copy_mode = NETMAP_COPY_MODE_IPS;
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} else if (strcmp(copymodestr, "tap") == 0) {
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SCLogInfo("Netmap TAP mode activated %s->%s",
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iface,
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aconf->out_iface);
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aconf->copy_mode = NETMAP_COPY_MODE_TAP;
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} else {
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SCLogInfo("Invalid mode (not in tap, ips)");
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}
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}
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SC_ATOMIC_RESET(aconf->ref);
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(void) SC_ATOMIC_ADD(aconf->ref, aconf->threads);
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/* load netmap bpf filter */
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/* command line value has precedence */
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if (ConfGet("bpf-filter", &bpf_filter) != 1) {
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if (ConfGetChildValueWithDefault(if_root, if_default, "bpf-filter", &bpf_filter) == 1) {
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if (strlen(bpf_filter) > 0) {
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aconf->bpf_filter = bpf_filter;
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SCLogInfo("Going to use bpf filter %s", aconf->bpf_filter);
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}
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}
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}
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(void)ConfGetChildValueBoolWithDefault(if_root, if_default, "disable-promisc", (int *)&boolval);
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if (boolval) {
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SCLogInfo("Disabling promiscuous mode on iface %s", aconf->iface);
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aconf->promisc = 0;
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}
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if (ConfGetChildValueWithDefault(if_root, if_default, "checksum-checks", &tmpctype) == 1) {
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if (strcmp(tmpctype, "auto") == 0) {
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aconf->checksum_mode = CHECKSUM_VALIDATION_AUTO;
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} else if (strcmp(tmpctype, "yes") == 0) {
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aconf->checksum_mode = CHECKSUM_VALIDATION_ENABLE;
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} else if (strcmp(tmpctype, "no") == 0) {
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aconf->checksum_mode = CHECKSUM_VALIDATION_DISABLE;
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} else {
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SCLogError(SC_ERR_INVALID_ARGUMENT, "Invalid value for checksum-checks for %s", aconf->iface);
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}
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}
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return aconf;
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}
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static int NetmapConfigGeThreadsCount(void *conf)
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{
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NetmapIfaceConfig *aconf = (NetmapIfaceConfig *)conf;
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return aconf->threads;
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}
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int NetmapRunModeIsIPS()
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{
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int nlive = LiveGetDeviceCount();
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int ldev;
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ConfNode *if_root;
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ConfNode *if_default = NULL;
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ConfNode *netmap_node;
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int has_ips = 0;
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int has_ids = 0;
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/* Find initial node */
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netmap_node = ConfGetNode("netmap");
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if (netmap_node == NULL) {
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return 0;
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}
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if_default = ConfNodeLookupKeyValue(netmap_node, "interface", "default");
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for (ldev = 0; ldev < nlive; ldev++) {
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char *live_dev = LiveGetDeviceName(ldev);
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if (live_dev == NULL) {
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SCLogError(SC_ERR_INVALID_VALUE, "Problem with config file");
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return 0;
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}
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char *copymodestr = NULL;
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if_root = ConfNodeLookupKeyValue(netmap_node, "interface", live_dev);
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if (if_root == NULL) {
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if (if_default == NULL) {
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SCLogError(SC_ERR_INVALID_VALUE, "Problem with config file");
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return 0;
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}
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if_root = if_default;
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}
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if (ConfGetChildValueWithDefault(if_root, if_default, "copy-mode", ©modestr) == 1) {
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if (strcmp(copymodestr, "ips") == 0) {
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has_ips = 1;
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} else {
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has_ids = 1;
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}
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} else {
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has_ids = 1;
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}
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}
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if (has_ids && has_ips) {
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SCLogInfo("Netmap mode using IPS and IDS mode");
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for (ldev = 0; ldev < nlive; ldev++) {
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char *live_dev = LiveGetDeviceName(ldev);
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if (live_dev == NULL) {
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SCLogError(SC_ERR_INVALID_VALUE, "Problem with config file");
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return 0;
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}
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if_root = ConfNodeLookupKeyValue(netmap_node, "interface", live_dev);
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char *copymodestr = NULL;
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if (if_root == NULL) {
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if (if_default == NULL) {
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SCLogError(SC_ERR_INVALID_VALUE, "Problem with config file");
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return 0;
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}
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if_root = if_default;
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}
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if (! ((ConfGetChildValueWithDefault(if_root, if_default, "copy-mode", ©modestr) == 1) &&
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(strcmp(copymodestr, "ips") == 0))) {
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SCLogError(SC_ERR_INVALID_ARGUMENT,
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"Netmap IPS mode used and interface '%s' is in IDS or TAP mode. "
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"Sniffing '%s' but expect bad result as stream-inline is activated.",
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live_dev, live_dev);
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}
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}
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}
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return has_ips;
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}
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#endif // #ifdef HAVE_NETMAP
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int RunModeIdsNetmapAutoFp(DetectEngineCtx *de_ctx)
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{
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SCEnter();
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#ifdef HAVE_NETMAP
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int ret;
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char *live_dev = NULL;
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RunModeInitialize();
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TimeModeSetLive();
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(void)ConfGet("netmap.live-interface", &live_dev);
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SCLogDebug("live_dev %s", live_dev);
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ret = RunModeSetLiveCaptureAutoFp(de_ctx,
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ParseNetmapConfig,
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NetmapConfigGeThreadsCount,
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"ReceiveNetmap",
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"DecodeNetmap", "RxNetmap",
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live_dev);
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if (ret != 0) {
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SCLogError(SC_ERR_RUNMODE, "Unable to start runmode");
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exit(EXIT_FAILURE);
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}
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SCLogInfo("RunModeIdsNetmapAutoFp initialised");
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#endif /* HAVE_NETMAP */
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SCReturnInt(0);
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}
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/**
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* \brief Single thread version of the netmap processing.
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*/
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int RunModeIdsNetmapSingle(DetectEngineCtx *de_ctx)
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{
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SCEnter();
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#ifdef HAVE_NETMAP
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int ret;
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char *live_dev = NULL;
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RunModeInitialize();
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TimeModeSetLive();
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(void)ConfGet("netmap.live-interface", &live_dev);
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ret = RunModeSetLiveCaptureSingle(de_ctx,
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ParseNetmapConfig,
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NetmapConfigGeThreadsCount,
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"ReceiveNetmap",
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"DecodeNetmap", "NetmapPkt",
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live_dev);
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if (ret != 0) {
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SCLogError(SC_ERR_RUNMODE, "Unable to start runmode");
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exit(EXIT_FAILURE);
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}
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|
|
||||||
|
SCLogInfo("RunModeIdsNetmapSingle initialised");
|
||||||
|
|
||||||
|
#endif /* HAVE_NETMAP */
|
||||||
|
SCReturnInt(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Workers version of the netmap processing.
|
||||||
|
*
|
||||||
|
* Start N threads with each thread doing all the work.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
int RunModeIdsNetmapWorkers(DetectEngineCtx *de_ctx)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
|
||||||
|
#ifdef HAVE_NETMAP
|
||||||
|
int ret;
|
||||||
|
char *live_dev = NULL;
|
||||||
|
|
||||||
|
RunModeInitialize();
|
||||||
|
TimeModeSetLive();
|
||||||
|
|
||||||
|
(void)ConfGet("netmap.live-interface", &live_dev);
|
||||||
|
|
||||||
|
ret = RunModeSetLiveCaptureWorkers(de_ctx,
|
||||||
|
ParseNetmapConfig,
|
||||||
|
NetmapConfigGeThreadsCount,
|
||||||
|
"ReceiveNetmap",
|
||||||
|
"DecodeNetmap", "NetmapPkt",
|
||||||
|
live_dev);
|
||||||
|
if (ret != 0) {
|
||||||
|
SCLogError(SC_ERR_RUNMODE, "Unable to start runmode");
|
||||||
|
exit(EXIT_FAILURE);
|
||||||
|
}
|
||||||
|
|
||||||
|
SCLogInfo("RunModeIdsNetmapWorkers initialised");
|
||||||
|
|
||||||
|
#endif /* HAVE_NETMAP */
|
||||||
|
SCReturnInt(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @}
|
||||||
|
*/
|
||||||
@ -0,0 +1,33 @@
|
|||||||
|
/* Copyright (C) 2014 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 Aleksey Katargin <gureedo@gmail.com>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __RUNMODE_NETMAP_H__
|
||||||
|
#define __RUNMODE_NETMAP_H__
|
||||||
|
|
||||||
|
int RunModeIdsNetmapSingle(DetectEngineCtx *);
|
||||||
|
int RunModeIdsNetmapAutoFp(DetectEngineCtx *);
|
||||||
|
int RunModeIdsNetmapWorkers(DetectEngineCtx *);
|
||||||
|
void RunModeIdsNetmapRegister(void);
|
||||||
|
const char *RunModeNetmapGetDefaultMode(void);
|
||||||
|
int NetmapRunModeIsIPS();
|
||||||
|
|
||||||
|
#endif /* __RUNMODE_NETMAP_H__ */
|
||||||
@ -0,0 +1,999 @@
|
|||||||
|
/* Copyright (C) 2011-2014 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \defgroup netmap Netmap running mode
|
||||||
|
*
|
||||||
|
* @{
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \file
|
||||||
|
*
|
||||||
|
* \author Aleksey Katargin <gureedo@gmail.com>
|
||||||
|
*
|
||||||
|
* Netmap socket acquisition support
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "suricata-common.h"
|
||||||
|
#include "config.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-device.h"
|
||||||
|
#include "util-error.h"
|
||||||
|
#include "util-privs.h"
|
||||||
|
#include "util-optimize.h"
|
||||||
|
#include "util-checksum.h"
|
||||||
|
#include "util-ioctl.h"
|
||||||
|
#include "util-host-info.h"
|
||||||
|
#include "tmqh-packetpool.h"
|
||||||
|
#include "source-netmap.h"
|
||||||
|
#include "runmodes.h"
|
||||||
|
|
||||||
|
#ifdef __SC_CUDA_SUPPORT__
|
||||||
|
|
||||||
|
#include "util-cuda.h"
|
||||||
|
#include "util-cuda-buffer.h"
|
||||||
|
#include "util-mpm-ac.h"
|
||||||
|
#include "util-cuda-handlers.h"
|
||||||
|
#include "detect-engine.h"
|
||||||
|
#include "detect-engine-mpm.h"
|
||||||
|
#include "util-cuda-vars.h"
|
||||||
|
|
||||||
|
#endif /* __SC_CUDA_SUPPORT__ */
|
||||||
|
|
||||||
|
#ifdef HAVE_NETMAP
|
||||||
|
|
||||||
|
#if HAVE_SYS_IOCTL_H
|
||||||
|
#include <sys/ioctl.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if HAVE_SYS_MMAN_H
|
||||||
|
#include <sys/mman.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include <net/netmap_user.h>
|
||||||
|
|
||||||
|
#endif /* HAVE_NETMAP */
|
||||||
|
|
||||||
|
extern int max_pending_packets;
|
||||||
|
|
||||||
|
#ifndef HAVE_NETMAP
|
||||||
|
|
||||||
|
TmEcode NoNetmapSupportExit(ThreadVars *, void *, void **);
|
||||||
|
|
||||||
|
void TmModuleReceiveNetmapRegister (void)
|
||||||
|
{
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].name = "ReceiveNetmap";
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].ThreadInit = NoNetmapSupportExit;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].Func = NULL;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].ThreadExitPrintStats = NULL;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].ThreadDeinit = NULL;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].RegisterTests = NULL;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].cap_flags = 0;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].flags = TM_FLAG_RECEIVE_TM;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Registration Function for DecodeNetmap.
|
||||||
|
* \todo Unit tests are needed for this module.
|
||||||
|
*/
|
||||||
|
void TmModuleDecodeNetmapRegister (void)
|
||||||
|
{
|
||||||
|
tmm_modules[TMM_DECODENETMAP].name = "DecodeNetmap";
|
||||||
|
tmm_modules[TMM_DECODENETMAP].ThreadInit = NoNetmapSupportExit;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].Func = NULL;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].ThreadExitPrintStats = NULL;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].ThreadDeinit = NULL;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].RegisterTests = NULL;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].cap_flags = 0;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].flags = TM_FLAG_DECODE_TM;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief this function prints an error message and exits.
|
||||||
|
*/
|
||||||
|
TmEcode NoNetmapSupportExit(ThreadVars *tv, void *initdata, void **data)
|
||||||
|
{
|
||||||
|
SCLogError(SC_ERR_NO_NETMAP,"Error creating thread %s: you do not have "
|
||||||
|
"support for netmap enabled, please recompile "
|
||||||
|
"with --enable-netmap", tv->name);
|
||||||
|
exit(EXIT_FAILURE);
|
||||||
|
}
|
||||||
|
|
||||||
|
#else /* We have NETMAP support */
|
||||||
|
|
||||||
|
#define POLL_TIMEOUT 100
|
||||||
|
|
||||||
|
#if defined(__linux__)
|
||||||
|
#define POLL_EVENTS (POLLHUP|POLLRDHUP|POLLERR|POLLNVAL)
|
||||||
|
#else
|
||||||
|
#define POLL_EVENTS (POLLHUP|POLLERR|POLLNVAL)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
enum {
|
||||||
|
NETMAP_OK,
|
||||||
|
NETMAP_FAILURE,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum {
|
||||||
|
NETMAP_FLAG_ZERO_COPY = 1,
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Netmap ring isntance.
|
||||||
|
*/
|
||||||
|
typedef struct NetmapRing
|
||||||
|
{
|
||||||
|
int fd;
|
||||||
|
struct netmap_ring *rx;
|
||||||
|
struct netmap_ring *tx;
|
||||||
|
SCSpinlock tx_lock;
|
||||||
|
} NetmapRing;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Netmap device instance.
|
||||||
|
*/
|
||||||
|
typedef struct NetmapDevice_
|
||||||
|
{
|
||||||
|
char ifname[IFNAMSIZ];
|
||||||
|
void *mem;
|
||||||
|
size_t memsize;
|
||||||
|
struct netmap_if *nif;
|
||||||
|
int rings_cnt;
|
||||||
|
NetmapRing *rings;
|
||||||
|
unsigned int ref;
|
||||||
|
SC_ATOMIC_DECLARE(unsigned int, threads_run);
|
||||||
|
TAILQ_ENTRY(NetmapDevice_) next;
|
||||||
|
} NetmapDevice;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Module thread local variables.
|
||||||
|
*/
|
||||||
|
typedef struct NetmapThreadVars_
|
||||||
|
{
|
||||||
|
/* receive inteface */
|
||||||
|
NetmapDevice *ifsrc;
|
||||||
|
/* dst interface for IPS mode */
|
||||||
|
NetmapDevice *ifdst;
|
||||||
|
|
||||||
|
int ring_from;
|
||||||
|
int ring_to;
|
||||||
|
int thread_idx;
|
||||||
|
int flags;
|
||||||
|
struct bpf_program bpf_prog;
|
||||||
|
|
||||||
|
/* internal shit */
|
||||||
|
TmSlot *slot;
|
||||||
|
ThreadVars *tv;
|
||||||
|
LiveDevice *livedev;
|
||||||
|
|
||||||
|
/* copy from config */
|
||||||
|
int copy_mode;
|
||||||
|
ChecksumValidationMode checksum_mode;
|
||||||
|
|
||||||
|
/* counters */
|
||||||
|
uint64_t pkts;
|
||||||
|
uint64_t bytes;
|
||||||
|
uint64_t drops;
|
||||||
|
uint16_t capture_kernel_packets;
|
||||||
|
uint16_t capture_kernel_drops;
|
||||||
|
|
||||||
|
|
||||||
|
} NetmapThreadVars;
|
||||||
|
|
||||||
|
typedef TAILQ_HEAD(NetmapDeviceList_, NetmapDevice_) NetmapDeviceList;
|
||||||
|
|
||||||
|
static NetmapDeviceList netmap_devlist = TAILQ_HEAD_INITIALIZER(netmap_devlist);
|
||||||
|
static SCMutex netmap_devlist_lock = SCMUTEX_INITIALIZER;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Get interface flags.
|
||||||
|
* \param fd Network susbystem file descritor.
|
||||||
|
* \param ifname Inteface name.
|
||||||
|
* \return Interface flags or -1 on error
|
||||||
|
*/
|
||||||
|
static int NetmapGetIfaceFlags(int fd, const char *ifname)
|
||||||
|
{
|
||||||
|
struct ifreq ifr;
|
||||||
|
|
||||||
|
memset(&ifr, 0, sizeof(ifr));
|
||||||
|
strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
|
||||||
|
|
||||||
|
if (ioctl(fd, SIOCGIFFLAGS, &ifr) == -1) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Unable to get flags for iface \"%s\": %s",
|
||||||
|
ifname, strerror(errno));
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef OS_FREEBSD
|
||||||
|
int flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
|
||||||
|
return flags;
|
||||||
|
#else
|
||||||
|
return ifr.ifr_flags;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Set interface flags.
|
||||||
|
* \param fd Network susbystem file descritor.
|
||||||
|
* \param ifname Inteface name.
|
||||||
|
* \param flags Flags to set.
|
||||||
|
* \return Zero on success.
|
||||||
|
*/
|
||||||
|
static int NetmapSetIfaceFlags(int fd, const char *ifname, int flags)
|
||||||
|
{
|
||||||
|
struct ifreq ifr;
|
||||||
|
|
||||||
|
memset(&ifr, 0, sizeof(ifr));
|
||||||
|
strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
|
||||||
|
#ifdef OS_FREEBSD
|
||||||
|
ifr.ifr_flags = flags & 0xffff;
|
||||||
|
ifr.ifr_flagshigh = flags >> 16;
|
||||||
|
#else
|
||||||
|
ifr.ifr_flags = flags;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
if (ioctl(fd, SIOCSIFFLAGS, &ifr) == -1) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Unable to set flags for iface \"%s\": %s",
|
||||||
|
ifname, strerror(errno));
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Open interface in netmap mode.
|
||||||
|
* \param ifname Interface name.
|
||||||
|
* \param promisc Enable promiscuous mode.
|
||||||
|
* \param dev Pointer to requested netmap device instance.
|
||||||
|
* \param verbose Verbose error logging.
|
||||||
|
* \return Zero on success.
|
||||||
|
*/
|
||||||
|
static int NetmapOpen(char *ifname, int promisc, NetmapDevice **pdevice, int verbose)
|
||||||
|
{
|
||||||
|
NetmapDevice *pdev = NULL;
|
||||||
|
struct nmreq nm_req;
|
||||||
|
|
||||||
|
*pdevice = NULL;
|
||||||
|
|
||||||
|
SCMutexLock(&netmap_devlist_lock);
|
||||||
|
|
||||||
|
/* search interface in our already opened list */
|
||||||
|
TAILQ_FOREACH(pdev, &netmap_devlist, next) {
|
||||||
|
if (strcmp(ifname, pdev->ifname) == 0) {
|
||||||
|
*pdevice = pdev;
|
||||||
|
pdev->ref++;
|
||||||
|
SCMutexUnlock(&netmap_devlist_lock);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* not found, create new record */
|
||||||
|
pdev = SCMalloc(sizeof(*pdev));
|
||||||
|
if (unlikely(pdev == NULL)) {
|
||||||
|
SCLogError(SC_ERR_MEM_ALLOC, "Memory allocation failed");
|
||||||
|
goto error;
|
||||||
|
}
|
||||||
|
|
||||||
|
memset(pdev, 0, sizeof(*pdev));
|
||||||
|
SC_ATOMIC_INIT(pdev->threads_run);
|
||||||
|
strlcpy(pdev->ifname, ifname, sizeof(pdev->ifname));
|
||||||
|
|
||||||
|
/* open netmap */
|
||||||
|
int fd = open("/dev/netmap", O_RDWR);
|
||||||
|
if (fd == -1) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Couldn't open netmap device, error %s",
|
||||||
|
strerror(errno));
|
||||||
|
goto error_pdev;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* check interface is up */
|
||||||
|
int if_fd = socket(AF_INET, SOCK_DGRAM, 0);
|
||||||
|
if (if_fd < 0) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Couldn't create control socket for '%s' interface",
|
||||||
|
ifname);
|
||||||
|
goto error_fd;
|
||||||
|
}
|
||||||
|
int if_flags = NetmapGetIfaceFlags(if_fd, ifname);
|
||||||
|
if (if_flags == -1) {
|
||||||
|
if (verbose) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Can not access to interface '%s'",
|
||||||
|
ifname);
|
||||||
|
}
|
||||||
|
close(if_fd);
|
||||||
|
goto error_fd;
|
||||||
|
}
|
||||||
|
if ((if_flags & IFF_UP) == 0) {
|
||||||
|
if (verbose) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE, "Interface '%s' is down", ifname);
|
||||||
|
}
|
||||||
|
close(if_fd);
|
||||||
|
goto error_fd;
|
||||||
|
}
|
||||||
|
if (promisc) {
|
||||||
|
if_flags |= IFF_PROMISC;
|
||||||
|
NetmapSetIfaceFlags(if_fd, ifname, if_flags);
|
||||||
|
}
|
||||||
|
close(if_fd);
|
||||||
|
|
||||||
|
/* query netmap info */
|
||||||
|
memset(&nm_req, 0, sizeof(nm_req));
|
||||||
|
strlcpy(nm_req.nr_name, ifname, sizeof(nm_req.nr_name));
|
||||||
|
nm_req.nr_version = NETMAP_API;
|
||||||
|
|
||||||
|
if (ioctl(fd, NIOCGINFO, &nm_req) != 0) {
|
||||||
|
if (verbose) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Couldn't query netmap for %s, error %s",
|
||||||
|
ifname, strerror(errno));
|
||||||
|
}
|
||||||
|
goto error_fd;
|
||||||
|
};
|
||||||
|
if (nm_req.nr_rx_rings != nm_req.nr_tx_rings) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Interface '%s' have non-equeal Tx/Rx rings (%"PRIu16"/%"PRIu16")",
|
||||||
|
ifname, nm_req.nr_rx_rings, nm_req.nr_tx_rings);
|
||||||
|
goto error_fd;
|
||||||
|
}
|
||||||
|
|
||||||
|
pdev->rings_cnt = nm_req.nr_rx_rings;
|
||||||
|
pdev->memsize = nm_req.nr_memsize;
|
||||||
|
|
||||||
|
pdev->rings = SCMalloc(sizeof(*pdev->rings) * pdev->rings_cnt);
|
||||||
|
if (unlikely(pdev->rings == NULL)) {
|
||||||
|
SCLogError(SC_ERR_MEM_ALLOC, "Memory allocation failed");
|
||||||
|
goto error_fd;
|
||||||
|
}
|
||||||
|
memset(pdev->rings, 0, sizeof(*pdev->rings) * pdev->rings_cnt);
|
||||||
|
|
||||||
|
/* open individual instance for each ring */
|
||||||
|
int success_cnt = 0;
|
||||||
|
for (int i = 0; i < pdev->rings_cnt; i++) {
|
||||||
|
NetmapRing *pring = &pdev->rings[i];
|
||||||
|
pring->fd = open("/dev/netmap", O_RDWR);
|
||||||
|
if (pring->fd == -1) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Couldn't open netmap device: %s",
|
||||||
|
strerror(errno));
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
nm_req.nr_flags = NR_REG_ONE_NIC;
|
||||||
|
nm_req.nr_ringid = i | NETMAP_NO_TX_POLL;
|
||||||
|
if (ioctl(pring->fd, NIOCREGIF, &nm_req) != 0) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Couldn't register %s with netmap: %s",
|
||||||
|
ifname, strerror(errno));
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (pdev->mem == NULL) {
|
||||||
|
pdev->mem = mmap(0, pdev->memsize, PROT_WRITE | PROT_READ,
|
||||||
|
MAP_SHARED, pring->fd, 0);
|
||||||
|
if (pdev->mem == MAP_FAILED) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Couldn't mmap netmap device: %s",
|
||||||
|
strerror(errno));
|
||||||
|
goto error_fd;
|
||||||
|
}
|
||||||
|
pdev->nif = NETMAP_IF(pdev->mem, nm_req.nr_offset);
|
||||||
|
}
|
||||||
|
|
||||||
|
pring->rx = NETMAP_RXRING(pdev->nif, i);
|
||||||
|
pring->tx = NETMAP_TXRING(pdev->nif, i);
|
||||||
|
SCSpinInit(&pring->tx_lock, 0);
|
||||||
|
success_cnt++;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (success_cnt != pdev->rings_cnt) {
|
||||||
|
for(int i = 0; i < success_cnt; i++) {
|
||||||
|
close(pdev->rings[i].fd);
|
||||||
|
}
|
||||||
|
SCFree(pdev->rings);
|
||||||
|
goto error_mem;
|
||||||
|
}
|
||||||
|
|
||||||
|
close(fd);
|
||||||
|
*pdevice = pdev;
|
||||||
|
|
||||||
|
TAILQ_INSERT_TAIL(&netmap_devlist, pdev, next);
|
||||||
|
SCMutexUnlock(&netmap_devlist_lock);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
error_mem:
|
||||||
|
munmap(pdev->mem, pdev->memsize);
|
||||||
|
error_fd:
|
||||||
|
close(fd);
|
||||||
|
error_pdev:
|
||||||
|
SCFree(pdev);
|
||||||
|
error:
|
||||||
|
SCMutexUnlock(&netmap_devlist_lock);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Close or dereference netmap device instance.
|
||||||
|
* \param pdev Netmap device instance.
|
||||||
|
* \return Zero on success.
|
||||||
|
*/
|
||||||
|
static int NetmapClose(NetmapDevice *dev)
|
||||||
|
{
|
||||||
|
NetmapDevice *pdev, *tmp;
|
||||||
|
|
||||||
|
SCMutexLock(&netmap_devlist_lock);
|
||||||
|
|
||||||
|
TAILQ_FOREACH_SAFE(pdev, &netmap_devlist, next, tmp) {
|
||||||
|
if (pdev == dev) {
|
||||||
|
pdev->ref--;
|
||||||
|
if (!pdev->ref) {
|
||||||
|
munmap(pdev->mem, pdev->memsize);
|
||||||
|
for (int i = 0; i < pdev->rings_cnt; i++) {
|
||||||
|
NetmapRing *pring = &pdev->rings[i];
|
||||||
|
close(pring->fd);
|
||||||
|
SCSpinDestroy(&pring->tx_lock);
|
||||||
|
}
|
||||||
|
SCFree(pdev->rings);
|
||||||
|
TAILQ_REMOVE(&netmap_devlist, pdev, next);
|
||||||
|
SCFree(pdev);
|
||||||
|
}
|
||||||
|
SCMutexUnlock(&netmap_devlist_lock);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
SCMutexUnlock(&netmap_devlist_lock);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief PcapDumpCounters
|
||||||
|
* \param ntv
|
||||||
|
*/
|
||||||
|
static inline void NetmapDumpCounters(NetmapThreadVars *ntv)
|
||||||
|
{
|
||||||
|
SCPerfCounterAddUI64(ntv->capture_kernel_packets, ntv->tv->sc_perf_pca, ntv->pkts);
|
||||||
|
SCPerfCounterAddUI64(ntv->capture_kernel_drops, ntv->tv->sc_perf_pca, ntv->drops);
|
||||||
|
(void) SC_ATOMIC_ADD(ntv->livedev->drop, ntv->drops);
|
||||||
|
(void) SC_ATOMIC_ADD(ntv->livedev->pkts, ntv->pkts);
|
||||||
|
ntv->drops = 0;
|
||||||
|
ntv->pkts = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Init function for ReceiveNetmap.
|
||||||
|
* \param tv pointer to ThreadVars
|
||||||
|
* \param initdata pointer to the interface passed from the user
|
||||||
|
* \param data pointer gets populated with NetmapThreadVars
|
||||||
|
*/
|
||||||
|
static TmEcode ReceiveNetmapThreadInit(ThreadVars *tv, void *initdata, void **data)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
NetmapIfaceConfig *aconf = initdata;
|
||||||
|
|
||||||
|
if (initdata == NULL) {
|
||||||
|
SCLogError(SC_ERR_INVALID_ARGUMENT, "initdata == NULL");
|
||||||
|
SCReturnInt(TM_ECODE_FAILED);
|
||||||
|
}
|
||||||
|
|
||||||
|
NetmapThreadVars *ntv = SCMalloc(sizeof(*ntv));
|
||||||
|
if (unlikely(ntv == NULL)) {
|
||||||
|
SCLogError(SC_ERR_MEM_ALLOC, "Memory allocation failed");
|
||||||
|
goto error;
|
||||||
|
}
|
||||||
|
memset(ntv, 0, sizeof(*ntv));
|
||||||
|
|
||||||
|
ntv->tv = tv;
|
||||||
|
ntv->checksum_mode = aconf->checksum_mode;
|
||||||
|
ntv->copy_mode = aconf->copy_mode;
|
||||||
|
|
||||||
|
ntv->livedev = LiveGetDevice(aconf->iface);
|
||||||
|
if (ntv->livedev == NULL) {
|
||||||
|
SCLogError(SC_ERR_INVALID_VALUE, "Unable to find Live device");
|
||||||
|
goto error_ntv;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (NetmapOpen(aconf->iface, aconf->promisc, &ntv->ifsrc, 1) != 0) {
|
||||||
|
goto error_ntv;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (aconf->threads > ntv->ifsrc->rings_cnt) {
|
||||||
|
SCLogError(SC_ERR_INVALID_VALUE,
|
||||||
|
"Thread count can't be greater than ring count. "
|
||||||
|
"Configured %d threads for interfaces '%s' with %u rings.",
|
||||||
|
aconf->threads, aconf->iface, ntv->ifsrc->rings_cnt);
|
||||||
|
goto error_src;
|
||||||
|
}
|
||||||
|
|
||||||
|
do {
|
||||||
|
ntv->thread_idx = SC_ATOMIC_GET(ntv->ifsrc->threads_run);
|
||||||
|
} while (SC_ATOMIC_CAS(&ntv->ifsrc->threads_run, ntv->thread_idx, ntv->thread_idx + 1) == 0);
|
||||||
|
|
||||||
|
/* calculate rings borders */
|
||||||
|
int tmp = ntv->ifsrc->rings_cnt / aconf->threads;
|
||||||
|
ntv->ring_from = ntv->thread_idx * tmp;
|
||||||
|
ntv->ring_to = ntv->ring_from + tmp - 1;
|
||||||
|
if (ntv->ring_to >= ntv->ifsrc->rings_cnt)
|
||||||
|
ntv->ring_to = ntv->ifsrc->rings_cnt - 1;
|
||||||
|
|
||||||
|
if (aconf->copy_mode != NETMAP_COPY_MODE_NONE) {
|
||||||
|
if (NetmapOpen(aconf->out_iface, 0, &ntv->ifdst, 1) != 0) {
|
||||||
|
goto error_src;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* basic counters */
|
||||||
|
ntv->capture_kernel_packets = SCPerfTVRegisterCounter("capture.kernel_packets",
|
||||||
|
ntv->tv,
|
||||||
|
SC_PERF_TYPE_UINT64,
|
||||||
|
"NULL");
|
||||||
|
ntv->capture_kernel_drops = SCPerfTVRegisterCounter("capture.kernel_drops",
|
||||||
|
ntv->tv,
|
||||||
|
SC_PERF_TYPE_UINT64,
|
||||||
|
"NULL");
|
||||||
|
|
||||||
|
char const *active_runmode = RunmodeGetActive();
|
||||||
|
if (active_runmode && !strcmp("workers", active_runmode)) {
|
||||||
|
ntv->flags |= NETMAP_FLAG_ZERO_COPY;
|
||||||
|
SCLogInfo("Enabling zero copy mode");
|
||||||
|
}
|
||||||
|
|
||||||
|
if (aconf->bpf_filter) {
|
||||||
|
SCLogInfo("Using BPF '%s' on iface '%s'",
|
||||||
|
aconf->bpf_filter, ntv->ifsrc->ifname);
|
||||||
|
if (pcap_compile_nopcap(default_packet_size, /* snaplen_arg */
|
||||||
|
LINKTYPE_ETHERNET, /* linktype_arg */
|
||||||
|
&ntv->bpf_prog, /* program */
|
||||||
|
aconf->bpf_filter, /* const char *buf */
|
||||||
|
1, /* optimize */
|
||||||
|
PCAP_NETMASK_UNKNOWN /* mask */
|
||||||
|
) == -1) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_CREATE, "Filter compilation failed.");
|
||||||
|
goto error_src;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (GetIfaceOffloading(aconf->iface) == 1) {
|
||||||
|
SCLogWarning(SC_ERR_NETMAP_CREATE,
|
||||||
|
"Using mmap mode with GRO or LRO activated can lead to capture problems");
|
||||||
|
}
|
||||||
|
|
||||||
|
*data = (void *)ntv;
|
||||||
|
aconf->DerefFunc(aconf);
|
||||||
|
SCReturnInt(TM_ECODE_OK);
|
||||||
|
|
||||||
|
error_src:
|
||||||
|
NetmapClose(ntv->ifsrc);
|
||||||
|
error_ntv:
|
||||||
|
SCFree(ntv);
|
||||||
|
error:
|
||||||
|
aconf->DerefFunc(aconf);
|
||||||
|
SCReturnInt(TM_ECODE_FAILED);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Output packet to destination interface or drop.
|
||||||
|
* \param ntv Thread local variables.
|
||||||
|
* \param p Source packet.
|
||||||
|
*/
|
||||||
|
static TmEcode NetmapWritePacket(NetmapThreadVars *ntv, Packet *p)
|
||||||
|
{
|
||||||
|
if (ntv->copy_mode == NETMAP_COPY_MODE_IPS) {
|
||||||
|
if (PACKET_TEST_ACTION(p, ACTION_DROP)) {
|
||||||
|
return TM_ECODE_OK;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* map src ring_id to dst ring_id */
|
||||||
|
int dst_ring_id = p->netmap_v.ring_id % ntv->ifdst->rings_cnt;
|
||||||
|
NetmapRing *txring = &ntv->ifdst->rings[dst_ring_id];
|
||||||
|
NetmapRing *rxring = &ntv->ifsrc->rings[p->netmap_v.ring_id];
|
||||||
|
|
||||||
|
SCSpinLock(&txring->tx_lock);
|
||||||
|
|
||||||
|
if (!nm_ring_space(txring->tx)) {
|
||||||
|
ntv->drops++;
|
||||||
|
SCSpinUnlock(&txring->tx_lock);
|
||||||
|
return TM_ECODE_FAILED;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct netmap_slot *rs = &rxring->rx->slot[p->netmap_v.slot_id];
|
||||||
|
struct netmap_slot *ts = &txring->tx->slot[txring->tx->cur];
|
||||||
|
|
||||||
|
/* swap slot buffers */
|
||||||
|
uint32_t tmp_idx;
|
||||||
|
tmp_idx = ts->buf_idx;
|
||||||
|
ts->buf_idx = rs->buf_idx;
|
||||||
|
rs->buf_idx = tmp_idx;
|
||||||
|
|
||||||
|
ts->len = rs->len;
|
||||||
|
|
||||||
|
ts->flags |= NS_BUF_CHANGED;
|
||||||
|
rs->flags |= NS_BUF_CHANGED;
|
||||||
|
|
||||||
|
txring->tx->head = txring->tx->cur = nm_ring_next(txring->tx, txring->tx->cur);
|
||||||
|
|
||||||
|
SCSpinUnlock(&txring->tx_lock);
|
||||||
|
|
||||||
|
return TM_ECODE_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Packet release routine.
|
||||||
|
* \param p Packet.
|
||||||
|
*/
|
||||||
|
static void NetmapReleasePacket(Packet *p)
|
||||||
|
{
|
||||||
|
NetmapThreadVars *ntv = (NetmapThreadVars *)p->netmap_v.ntv;
|
||||||
|
|
||||||
|
/* Need to be in copy mode and need to detect early release
|
||||||
|
where Ethernet header could not be set (and pseudo packet) */
|
||||||
|
if ((ntv->copy_mode != NETMAP_COPY_MODE_NONE) && !PKT_IS_PSEUDOPKT(p)) {
|
||||||
|
NetmapWritePacket(ntv, p);
|
||||||
|
}
|
||||||
|
|
||||||
|
PacketFreeOrRelease(p);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Read packets from ring and pass them further.
|
||||||
|
* \param ntv Thread local variables.
|
||||||
|
* \param ring_id Ring id to read.
|
||||||
|
*/
|
||||||
|
static int NetmapRingRead(NetmapThreadVars *ntv, int ring_id)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
|
||||||
|
struct netmap_ring *ring = ntv->ifsrc->rings[ring_id].rx;
|
||||||
|
uint32_t avail = nm_ring_space(ring);
|
||||||
|
uint32_t cur = ring->cur;
|
||||||
|
|
||||||
|
while (likely(avail-- > 0)) {
|
||||||
|
struct netmap_slot *slot = &ring->slot[cur];
|
||||||
|
unsigned char *slot_data = (unsigned char *)NETMAP_BUF(ring, slot->buf_idx);
|
||||||
|
|
||||||
|
if (ntv->bpf_prog.bf_len) {
|
||||||
|
struct pcap_pkthdr pkthdr = { {0, 0}, slot->len, slot->len };
|
||||||
|
if (pcap_offline_filter(&ntv->bpf_prog, &pkthdr, slot_data) == 0) {
|
||||||
|
/* rejected by bpf */
|
||||||
|
cur = nm_ring_next(ring, cur);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
Packet *p = PacketGetFromQueueOrAlloc();
|
||||||
|
if (unlikely(p == NULL)) {
|
||||||
|
SCReturnInt(NETMAP_FAILURE);
|
||||||
|
}
|
||||||
|
|
||||||
|
PKT_SET_SRC(p, PKT_SRC_WIRE);
|
||||||
|
p->livedev = ntv->livedev;
|
||||||
|
p->datalink = LINKTYPE_ETHERNET;
|
||||||
|
p->ts = ring->ts;
|
||||||
|
ntv->pkts++;
|
||||||
|
ntv->bytes += slot->len;
|
||||||
|
|
||||||
|
/* checksum validation */
|
||||||
|
if (ntv->checksum_mode == CHECKSUM_VALIDATION_DISABLE) {
|
||||||
|
p->flags |= PKT_IGNORE_CHECKSUM;
|
||||||
|
} else if (ntv->checksum_mode == CHECKSUM_VALIDATION_AUTO) {
|
||||||
|
if (ntv->livedev->ignore_checksum) {
|
||||||
|
p->flags |= PKT_IGNORE_CHECKSUM;
|
||||||
|
} else if (ChecksumAutoModeCheck(ntv->pkts,
|
||||||
|
SC_ATOMIC_GET(ntv->livedev->pkts),
|
||||||
|
SC_ATOMIC_GET(ntv->livedev->invalid_checksums))) {
|
||||||
|
ntv->livedev->ignore_checksum = 1;
|
||||||
|
p->flags |= PKT_IGNORE_CHECKSUM;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ntv->flags & NETMAP_FLAG_ZERO_COPY) {
|
||||||
|
if (PacketSetData(p, slot_data, slot->len) == -1) {
|
||||||
|
TmqhOutputPacketpool(ntv->tv, p);
|
||||||
|
SCReturnInt(NETMAP_FAILURE);
|
||||||
|
} else {
|
||||||
|
p->ReleasePacket = NetmapReleasePacket;
|
||||||
|
p->netmap_v.ring_id = ring_id;
|
||||||
|
p->netmap_v.slot_id = cur;
|
||||||
|
p->netmap_v.ntv = ntv;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if (PacketCopyData(p, slot_data, slot->len) == -1) {
|
||||||
|
TmqhOutputPacketpool(ntv->tv, p);
|
||||||
|
SCReturnInt(NETMAP_FAILURE);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
SCLogDebug("pktlen: %" PRIu32 " (pkt %p, pkt data %p)",
|
||||||
|
GET_PKT_LEN(p), p, GET_PKT_DATA(p));
|
||||||
|
|
||||||
|
if (TmThreadsSlotProcessPkt(ntv->tv, ntv->slot, p) != TM_ECODE_OK) {
|
||||||
|
TmqhOutputPacketpool(ntv->tv, p);
|
||||||
|
SCReturnInt(NETMAP_FAILURE);
|
||||||
|
}
|
||||||
|
|
||||||
|
cur = nm_ring_next(ring, cur);
|
||||||
|
}
|
||||||
|
ring->head = ring->cur = cur;
|
||||||
|
|
||||||
|
SCReturnInt(NETMAP_OK);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Main netmap reading loop function
|
||||||
|
*/
|
||||||
|
static TmEcode ReceiveNetmapLoop(ThreadVars *tv, void *data, void *slot)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
|
||||||
|
TmSlot *s = (TmSlot *)slot;
|
||||||
|
NetmapThreadVars *ntv = (NetmapThreadVars *)data;
|
||||||
|
struct pollfd *fds;
|
||||||
|
int rings_count = ntv->ring_to - ntv->ring_from + 1;
|
||||||
|
|
||||||
|
ntv->slot = s->slot_next;
|
||||||
|
|
||||||
|
fds = SCMalloc(sizeof(*fds) * rings_count);
|
||||||
|
if (unlikely(fds == NULL)) {
|
||||||
|
SCLogError(SC_ERR_MEM_ALLOC, "Memory allocation failed");
|
||||||
|
SCReturnInt(TM_ECODE_FAILED);
|
||||||
|
}
|
||||||
|
|
||||||
|
for (int i = 0; i < rings_count; i++) {
|
||||||
|
fds[i].fd = ntv->ifsrc->rings[ntv->ring_from + i].fd;
|
||||||
|
fds[i].events = POLLIN;
|
||||||
|
}
|
||||||
|
|
||||||
|
for(;;) {
|
||||||
|
if (suricata_ctl_flags != 0) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* make sure we have at least one packet in the packet pool,
|
||||||
|
* to prevent us from alloc'ing packets at line rate */
|
||||||
|
PacketPoolWait();
|
||||||
|
|
||||||
|
int r = poll(fds, rings_count, POLL_TIMEOUT);
|
||||||
|
|
||||||
|
if (r < 0) {
|
||||||
|
/* error */
|
||||||
|
if(errno != EINTR)
|
||||||
|
SCLogError(SC_ERR_NETMAP_READ,
|
||||||
|
"Error polling netmap from iface '%s': (%d" PRIu32 ") %s",
|
||||||
|
ntv->ifsrc->ifname, errno, strerror(errno));
|
||||||
|
continue;
|
||||||
|
} else if (r == 0) {
|
||||||
|
/* no events, timeout */
|
||||||
|
SCLogDebug("(%s:%d-%d) Poll timeout", ntv->ifsrc->ifname,
|
||||||
|
ntv->ring_from, ntv->ring_to);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (int i = 0; i < rings_count; i++) {
|
||||||
|
if (fds[i].revents & POLL_EVENTS) {
|
||||||
|
if (fds[i].revents & POLLERR) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_READ,
|
||||||
|
"Error reading data from iface '%s': (%d" PRIu32 ") %s",
|
||||||
|
ntv->ifsrc->ifname, errno, strerror(errno));
|
||||||
|
} else if (fds[i].revents & POLLNVAL) {
|
||||||
|
SCLogError(SC_ERR_NETMAP_READ,
|
||||||
|
"Invalid polling request");
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (likely(fds[i].revents & POLLIN)) {
|
||||||
|
int src_ring_id = ntv->ring_from + i;
|
||||||
|
NetmapRingRead(ntv, src_ring_id);
|
||||||
|
|
||||||
|
if (ntv->copy_mode != NETMAP_COPY_MODE_NONE) {
|
||||||
|
/* sync dst tx rings */
|
||||||
|
int dst_ring_id = src_ring_id % ntv->ifdst->rings_cnt;
|
||||||
|
NetmapRing *dst_ring = &ntv->ifdst->rings[dst_ring_id];
|
||||||
|
if (SCSpinTrylock(&dst_ring->tx_lock) == 0) {
|
||||||
|
ioctl(dst_ring->fd, NIOCTXSYNC, 0);
|
||||||
|
SCSpinUnlock(&dst_ring->tx_lock);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
NetmapDumpCounters(ntv);
|
||||||
|
SCPerfSyncCountersIfSignalled(tv);
|
||||||
|
}
|
||||||
|
|
||||||
|
SCFree(fds);
|
||||||
|
SCPerfSyncCountersIfSignalled(tv);
|
||||||
|
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 NetmapThreadVars for ntv
|
||||||
|
*/
|
||||||
|
static void ReceiveNetmapThreadExitStats(ThreadVars *tv, void *data)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
NetmapThreadVars *ntv = (NetmapThreadVars *)data;
|
||||||
|
|
||||||
|
NetmapDumpCounters(ntv);
|
||||||
|
SCLogInfo("(%s) Kernel: Packets %" PRIu64 ", dropped %" PRIu64 ", bytes %" PRIu64 "",
|
||||||
|
tv->name,
|
||||||
|
(uint64_t) SCPerfGetLocalCounterValue(ntv->capture_kernel_packets, tv->sc_perf_pca),
|
||||||
|
(uint64_t) SCPerfGetLocalCounterValue(ntv->capture_kernel_drops, tv->sc_perf_pca),
|
||||||
|
ntv->bytes);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief
|
||||||
|
* \param tv
|
||||||
|
* \param data Pointer to NetmapThreadVars.
|
||||||
|
*/
|
||||||
|
static TmEcode ReceiveNetmapThreadDeinit(ThreadVars *tv, void *data)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
|
||||||
|
NetmapThreadVars *ntv = (NetmapThreadVars *)data;
|
||||||
|
|
||||||
|
if (ntv->ifsrc) {
|
||||||
|
NetmapClose(ntv->ifsrc);
|
||||||
|
ntv->ifsrc = NULL;
|
||||||
|
}
|
||||||
|
if (ntv->ifdst) {
|
||||||
|
NetmapClose(ntv->ifdst);
|
||||||
|
ntv->ifdst = NULL;
|
||||||
|
}
|
||||||
|
if (ntv->bpf_prog.bf_insns) {
|
||||||
|
pcap_freecode(&ntv->bpf_prog);
|
||||||
|
}
|
||||||
|
|
||||||
|
SCReturnInt(TM_ECODE_OK);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Prepare netmap decode thread.
|
||||||
|
* \param tv Thread local avariables.
|
||||||
|
* \param initdata Thread config.
|
||||||
|
* \param data Pointer to DecodeThreadVars placed here.
|
||||||
|
*/
|
||||||
|
static TmEcode DecodeNetmapThreadInit(ThreadVars *tv, void *initdata, void **data)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
DecodeThreadVars *dtv = NULL;
|
||||||
|
|
||||||
|
dtv = DecodeThreadVarsAlloc(tv);
|
||||||
|
|
||||||
|
if (dtv == NULL)
|
||||||
|
SCReturnInt(TM_ECODE_FAILED);
|
||||||
|
|
||||||
|
DecodeRegisterPerfCounters(dtv, tv);
|
||||||
|
|
||||||
|
*data = (void *)dtv;
|
||||||
|
|
||||||
|
#ifdef __SC_CUDA_SUPPORT__
|
||||||
|
if (CudaThreadVarsInit(&dtv->cuda_vars) < 0)
|
||||||
|
SCReturnInt(TM_ECODE_FAILED);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
SCReturnInt(TM_ECODE_OK);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief This function passes off to link type decoders.
|
||||||
|
*
|
||||||
|
* DecodeNetmap 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 NetmapThreadVars for ntv
|
||||||
|
* \param pq pointer to the current PacketQueue
|
||||||
|
* \param postpq
|
||||||
|
*/
|
||||||
|
static TmEcode DecodeNetmap(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
|
||||||
|
DecodeThreadVars *dtv = (DecodeThreadVars *)data;
|
||||||
|
|
||||||
|
/* XXX HACK: flow timeout can call us for injected pseudo packets
|
||||||
|
* see bug: https://redmine.openinfosecfoundation.org/issues/1107 */
|
||||||
|
if (p->flags & PKT_PSEUDO_STREAM_END)
|
||||||
|
SCReturnInt(TM_ECODE_OK);
|
||||||
|
|
||||||
|
/* update counters */
|
||||||
|
SCPerfCounterIncr(dtv->counter_pkts, tv->sc_perf_pca);
|
||||||
|
SCPerfCounterAddUI64(dtv->counter_bytes, tv->sc_perf_pca, GET_PKT_LEN(p));
|
||||||
|
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));
|
||||||
|
|
||||||
|
DecodeEthernet(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq);
|
||||||
|
|
||||||
|
PacketDecodeFinalize(tv, dtv, p);
|
||||||
|
|
||||||
|
SCReturnInt(TM_ECODE_OK);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief
|
||||||
|
* \param tv
|
||||||
|
* \param data Pointer to DecodeThreadVars.
|
||||||
|
*/
|
||||||
|
static TmEcode DecodeNetmapThreadDeinit(ThreadVars *tv, void *data)
|
||||||
|
{
|
||||||
|
SCEnter();
|
||||||
|
|
||||||
|
if (data != NULL)
|
||||||
|
DecodeThreadVarsFree(tv, data);
|
||||||
|
|
||||||
|
SCReturnInt(TM_ECODE_OK);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Registration Function for RecieveNetmap.
|
||||||
|
*/
|
||||||
|
void TmModuleReceiveNetmapRegister(void)
|
||||||
|
{
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].name = "ReceiveNetmap";
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].ThreadInit = ReceiveNetmapThreadInit;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].Func = NULL;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].PktAcqLoop = ReceiveNetmapLoop;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].ThreadExitPrintStats = ReceiveNetmapThreadExitStats;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].ThreadDeinit = ReceiveNetmapThreadDeinit;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].RegisterTests = NULL;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].cap_flags = SC_CAP_NET_RAW;
|
||||||
|
tmm_modules[TMM_RECEIVENETMAP].flags = TM_FLAG_RECEIVE_TM;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \brief Registration Function for DecodeNetmap.
|
||||||
|
*/
|
||||||
|
void TmModuleDecodeNetmapRegister(void)
|
||||||
|
{
|
||||||
|
tmm_modules[TMM_DECODENETMAP].name = "DecodeNetmap";
|
||||||
|
tmm_modules[TMM_DECODENETMAP].ThreadInit = DecodeNetmapThreadInit;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].Func = DecodeNetmap;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].ThreadExitPrintStats = NULL;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].ThreadDeinit = DecodeNetmapThreadDeinit;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].RegisterTests = NULL;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].cap_flags = 0;
|
||||||
|
tmm_modules[TMM_DECODENETMAP].flags = TM_FLAG_DECODE_TM;
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* HAVE_NETMAP */
|
||||||
|
/* eof */
|
||||||
|
/**
|
||||||
|
* @}
|
||||||
|
*/
|
||||||
@ -0,0 +1,62 @@
|
|||||||
|
/* Copyright (C) 2014 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 Aleksey Katargin <gureedo@gmail.com>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __SOURCE_NETMAP_H__
|
||||||
|
#define __SOURCE_NETMAP_H__
|
||||||
|
|
||||||
|
#include "queue.h"
|
||||||
|
|
||||||
|
/* copy modes */
|
||||||
|
enum {
|
||||||
|
NETMAP_COPY_MODE_NONE,
|
||||||
|
NETMAP_COPY_MODE_TAP,
|
||||||
|
NETMAP_COPY_MODE_IPS,
|
||||||
|
};
|
||||||
|
|
||||||
|
#define NETMAP_IFACE_NAME_LENGTH 48
|
||||||
|
|
||||||
|
typedef struct NetmapIfaceConfig_
|
||||||
|
{
|
||||||
|
char iface[NETMAP_IFACE_NAME_LENGTH];
|
||||||
|
int threads;
|
||||||
|
int promisc;
|
||||||
|
int copy_mode;
|
||||||
|
ChecksumValidationMode checksum_mode;
|
||||||
|
char *bpf_filter;
|
||||||
|
char *out_iface;
|
||||||
|
SC_ATOMIC_DECLARE(unsigned int, ref);
|
||||||
|
void (*DerefFunc)(void *);
|
||||||
|
} NetmapIfaceConfig;
|
||||||
|
|
||||||
|
typedef struct NetmapPacketVars_
|
||||||
|
{
|
||||||
|
int ring_id;
|
||||||
|
int slot_id;
|
||||||
|
/* NetmapThreadVars */
|
||||||
|
void *ntv;
|
||||||
|
} NetmapPacketVars;
|
||||||
|
|
||||||
|
void TmModuleReceiveNetmapRegister (void);
|
||||||
|
void TmModuleDecodeNetmapRegister (void);
|
||||||
|
|
||||||
|
#endif /* __SOURCE_NETMAP_H__ */
|
||||||
Loading…
Reference in New Issue