suricata
source-netmap.c
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1 /* Copyright (C) 2011-2022 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19 * \defgroup netmap Netmap running mode
20 *
21 * @{
22 */
23 
24 /**
25  * \file
26  *
27  * \author Aleksey Katargin <gureedo@gmail.com>
28  * \author Victor Julien <victor@inliniac.net>
29  * \author Bill Meeks <billmeeks8@gmail.com>
30  *
31  * Netmap socket acquisition support
32  *
33  * Many thanks to Luigi Rizzo for guidance and support.
34  *
35  */
36 
37 #include "suricata.h"
38 #include "suricata-common.h"
39 #include "tm-threads.h"
40 #include "packet.h"
41 #include "util-bpf.h"
42 #include "util-privs.h"
43 #include "util-validate.h"
44 #include "util-datalink.h"
45 
46 #include "source-netmap.h"
47 
48 #ifdef HAVE_NETMAP
49 
50 #define NETMAP_WITH_LIBS
51 #ifdef DEBUG
52 #define DEBUG_NETMAP_USER
53 #endif
54 
55 #include <net/netmap_user.h>
56 #include <libnetmap.h>
57 
58 #endif /* HAVE_NETMAP */
59 
60 #include "util-ioctl.h"
61 
62 #ifndef HAVE_NETMAP
63 
64 /**
65 * \brief this function prints an error message and exits.
66 */
67 static TmEcode NoNetmapSupportExit(ThreadVars *tv, const void *initdata, void **data)
68 {
69  FatalError("Error creating thread %s: Netmap is not enabled. "
70  "Make sure to pass --enable-netmap to configure when building.",
71  tv->name);
72 }
73 
75 {
76  tmm_modules[TMM_RECEIVENETMAP].name = "ReceiveNetmap";
77  tmm_modules[TMM_RECEIVENETMAP].ThreadInit = NoNetmapSupportExit;
79 }
80 
81 /**
82 * \brief Registration Function for DecodeNetmap.
83 */
85 {
86  tmm_modules[TMM_DECODENETMAP].name = "DecodeNetmap";
87  tmm_modules[TMM_DECODENETMAP].ThreadInit = NoNetmapSupportExit;
89 }
90 
91 #else /* We have NETMAP support */
92 
93 #include "action-globals.h"
94 
95 #define POLL_TIMEOUT 100
96 
97 #if defined(__linux__)
98 #define POLL_EVENTS (POLLHUP|POLLRDHUP|POLLERR|POLLNVAL)
99 
100 #ifndef IFF_PPROMISC
101 #define IFF_PPROMISC IFF_PROMISC
102 #endif
103 
104 #else
105 #define POLL_EVENTS (POLLHUP|POLLERR|POLLNVAL)
106 #endif
107 
108 enum { NETMAP_FLAG_ZERO_COPY = 1, NETMAP_FLAG_EXCL_RING_ACCESS = 2 };
109 
110 /**
111  * \brief Netmap device instance. Each ring for each device gets its own
112  * device.
113  */
114 typedef struct NetmapDevice_
115 {
116  struct nmport_d *nmd;
117  unsigned int ref;
118  SC_ATOMIC_DECLARE(unsigned int, threads_run);
119  TAILQ_ENTRY(NetmapDevice_) next;
120  // actual ifname can only be 16, but we store a bit more,
121  // like the options string and a 'netmap:' prefix.
122  char ifname[32];
123  int ring;
124  int direction; // 0 rx, 1 tx
125 
126  // autofp: Used to lock a destination ring while we are sending data.
127  SCMutex netmap_dev_lock;
128 } NetmapDevice;
129 
130 /**
131  * \brief Module thread local variables.
132  */
133 typedef struct NetmapThreadVars_
134 {
135  /* receive interface */
136  NetmapDevice *ifsrc;
137  /* dst interface for IPS mode */
138  NetmapDevice *ifdst;
139 
140  int flags;
141  struct bpf_program bpf_prog;
142 
143  /* suricata internals */
144  TmSlot *slot;
145  ThreadVars *tv;
146  LiveDevice *livedev;
147 
148  /* copy from config */
149  int copy_mode;
150  ChecksumValidationMode checksum_mode;
151 
152  /* counters */
153  uint64_t pkts;
154  uint64_t bytes;
155  uint64_t drops;
156  uint16_t capture_kernel_packets;
157  uint16_t capture_kernel_drops;
158 } NetmapThreadVars;
159 
160 typedef TAILQ_HEAD(NetmapDeviceList_, NetmapDevice_) NetmapDeviceList;
161 
162 static NetmapDeviceList netmap_devlist = TAILQ_HEAD_INITIALIZER(netmap_devlist);
163 static SCMutex netmap_devlist_lock = SCMUTEX_INITIALIZER;
164 
165 /** \brief get RSS RX-queue count
166  * \retval rx_rings RSS RX queue count or 0 on error
167  */
168 int NetmapGetRSSCount(const char *ifname)
169 {
170  struct nmreq_port_info_get req;
171  struct nmreq_header hdr;
172  int rx_rings = 0;
173 
174  /* we need the base interface name to query queues */
175  char base_name[IFNAMSIZ];
176  strlcpy(base_name, ifname, sizeof(base_name));
177  if (strlen(base_name) > 0 &&
178  (base_name[strlen(base_name) - 1] == '^' || base_name[strlen(base_name) - 1] == '*')) {
179  base_name[strlen(base_name) - 1] = '\0';
180  }
181 
182  SCMutexLock(&netmap_devlist_lock);
183 
184  /* open netmap device */
185  int fd = open("/dev/netmap", O_RDWR);
186  if (fd == -1) {
187  SCLogError("%s: open netmap device failed: %s", ifname, strerror(errno));
188  goto error_open;
189  }
190 
191  /* query netmap interface info for ring count */
192  memset(&req, 0, sizeof(req));
193  memset(&hdr, 0, sizeof(hdr));
194  hdr.nr_version = NETMAP_API;
195  hdr.nr_reqtype = NETMAP_REQ_PORT_INFO_GET;
196  hdr.nr_body = (uintptr_t)&req;
197  strlcpy(hdr.nr_name, base_name, sizeof(hdr.nr_name));
198 
199  if (ioctl(fd, NIOCCTRL, &hdr) != 0) {
200  SCLogError(
201  "Query of netmap HW rings count on %s failed; error: %s", ifname, strerror(errno));
202  goto error_fd;
203  };
204 
205  /* return RX rings count if it equals TX rings count */
206  if (req.nr_rx_rings == req.nr_tx_rings) {
207  rx_rings = req.nr_rx_rings;
208  }
209 
210 error_fd:
211  close(fd);
212 error_open:
213  SCMutexUnlock(&netmap_devlist_lock);
214  return rx_rings;
215 }
216 
217 static void NetmapDestroyDevice(NetmapDevice *pdev)
218 {
219  nmport_close(pdev->nmd);
220  SCMutexDestroy(&pdev->netmap_dev_lock);
221  SCFree(pdev);
222 }
223 
224 /**
225  * \brief Close or dereference netmap device instance.
226  * \param dev Netmap device instance.
227  * \return Zero on success.
228  */
229 static int NetmapClose(NetmapDevice *dev)
230 {
231  NetmapDevice *pdev, *tmp;
232 
233  SCMutexLock(&netmap_devlist_lock);
234 
235  TAILQ_FOREACH_SAFE (pdev, &netmap_devlist, next, tmp) {
236  if (pdev == dev) {
237  pdev->ref--;
238  if (!pdev->ref) {
239  NetmapDestroyDevice(pdev);
240  }
241  SCMutexUnlock(&netmap_devlist_lock);
242  return 0;
243  }
244  }
245 
246  SCMutexUnlock(&netmap_devlist_lock);
247  return -1;
248 }
249 
250 /**
251  * \brief Close all open netmap device instances.
252  */
253 static void NetmapCloseAll(void)
254 {
255  NetmapDevice *pdev, *tmp;
256 
257  SCMutexLock(&netmap_devlist_lock);
258 
259  TAILQ_FOREACH_SAFE (pdev, &netmap_devlist, next, tmp) {
260  NetmapDestroyDevice(pdev);
261  }
262 
263  SCMutexUnlock(&netmap_devlist_lock);
264 }
265 
266 /**
267  * \brief Open interface in netmap mode.
268  * \param ifname Interface name.
269  * \param promisc Enable promiscuous mode.
270  * \param dev Pointer to requested netmap device instance.
271  * \param verbose Verbose error logging.
272  * \param read Indicates direction: RX or TX
273  * \param zerocopy 1 if zerocopy access requested
274  * \param soft Use Host stack (software) interface
275  * \return Zero on success.
276  */
277 static int NetmapOpen(NetmapIfaceSettings *ns, NetmapDevice **pdevice, int verbose, int read,
278  bool zerocopy, bool soft)
279 {
280  SCEnter();
281  SCLogDebug("ifname %s", ns->iface);
282 
283  char base_name[IFNAMSIZ];
284  strlcpy(base_name, ns->iface, sizeof(base_name));
285  if (strlen(base_name) > 0 &&
286  (base_name[strlen(base_name)-1] == '^' ||
287  base_name[strlen(base_name)-1] == '*'))
288  {
289  base_name[strlen(base_name)-1] = '\0';
290  }
291 
292  if (ns->real) {
293  /* check interface is up */
294  int if_flags = GetIfaceFlags(base_name);
295  if (if_flags == -1) {
296  if (verbose) {
297  SCLogError("%s: cannot access network interface: %s", base_name, ns->iface);
298  }
299  goto error;
300  }
301 
302  /* bring iface up if it is down */
303  if ((if_flags & IFF_UP) == 0) {
304  SCLogError("%s: interface is down", base_name);
305  goto error;
306  }
307  /* if needed, try to set iface in promisc mode */
308  if (ns->promisc && (if_flags & (IFF_PROMISC|IFF_PPROMISC)) == 0) {
309  if_flags |= IFF_PPROMISC;
310  SetIfaceFlags(base_name, if_flags); // TODO reset at exit
311  // TODO move to parse config?
312  }
313  }
314  NetmapDevice *pdev = NULL, *spdev = NULL;
315  pdev = SCCalloc(1, sizeof(*pdev));
316  if (unlikely(pdev == NULL)) {
317  SCLogError("%s: memory allocation failed", base_name);
318  goto error;
319  }
320  SC_ATOMIC_INIT(pdev->threads_run);
321 
322  SCMutexLock(&netmap_devlist_lock);
323 
324  const int direction = (read != 1);
325  int ring = 0;
326  /* Search for interface in our already opened list. */
327  /* We will find it when opening multiple rings on */
328  /* the device when it exposes multiple RSS queues. */
329  TAILQ_FOREACH(spdev, &netmap_devlist, next) {
330  SCLogDebug("spdev %s", spdev->ifname);
331  if (direction == spdev->direction && strcmp(ns->iface, spdev->ifname) == 0) {
332  ring = spdev->ring + 1;
333  }
334  }
335  SCLogDebug("netmap/%s: using ring %d", ns->iface, ring);
336 
337  const char *opt_R = "R";
338  const char *opt_T = "T";
339  const char *opt_x = "x"; // not for IPS
340  const char *opt_z = "z"; // zero copy, not for IPS
341 
342  /* assemble options string */
343  char optstr[16];
344  if (ns->ips)
345  opt_x = "";
346  // z seems to not play well with multiple opens of a real dev on linux
347  opt_z = "";
348 
349  /*
350  * How netmap endpoint names are selected:
351  *
352  * The following logic within the "retry" loop builds endpoint names.
353  *
354  * IPS Mode:
355  * There are two endpoints: one hardware NIC and either a hardware NIC or host stack "NIC".
356  *
357  * IDS Mode:
358  * One endpoint -- usually a hardware NIC.
359  *
360  * IPS mode -- with one endpoint a host stack "NIC":
361  * When using multiple rings/threads, then the open of the initial Ring 0 MUST
362  * instruct netmap to open multiple Host Stack rings (as the default is to open only a single
363  * pair). This is also critical for the HW NIC endpoint. This is done by adding
364  * “@conf:host-rings=x” suffix option (where “x” is the number of host rings desired)
365  * to BOTH endpoint nmport_open_desc() calls for ring 0 (hardware and host stack).
366  * For subsequent additional ring open calls, omit the suffix option specifying host ring count.
367  *
368  * IPS mode -- both endpoints are hardware NICs:
369  * Do NOT pass any suffix option (even for Ring 0). You do not need to tell netmap how many
370  * rings, because it already knows the correct value from the NIC driver itself. Specifying a
371  * desired ring count when both ends are Hardware NICs confuses netmap, and it seems to default
372  * to using only a single hardware ring. In this scenario, specify only the specific ring number
373  * being opened.
374  */
375 
376  // loop to retry opening if unsupported options are used
377 retry:
378  snprintf(optstr, sizeof(optstr), "%s%s%s", opt_z, opt_x, direction == 0 ? opt_R : opt_T);
379 
380  char devname[128];
381  if (strncmp(ns->iface, "netmap:", 7) == 0) {
382  snprintf(devname, sizeof(devname), "%s}%d%s%s",
383  ns->iface, ring, strlen(optstr) ? "/" : "", optstr);
384  } else if (strlen(ns->iface) > 5 && strncmp(ns->iface, "vale", 4) == 0 && isdigit(ns->iface[4])) {
385  snprintf(devname, sizeof(devname), "%s", ns->iface);
386  } else if (ring == 0 && ns->threads == 1) {
387  /* just a single thread and ring, so don't use ring param */
388  snprintf(devname, sizeof(devname), "netmap:%s%s%s",
389  ns->iface, strlen(optstr) ? "/" : "", optstr);
390  SCLogDebug("device with %s-ring enabled (devname): %s", soft ? "SW" : "HW", devname);
391  } else {
392  /* Going to be using multiple threads and rings */
393  if (ns->sw_ring) {
394  /* Opening a host stack interface */
395  if (ring == 0) {
396  /* Ring 0, so tell netmap how many host rings we want created */
397  snprintf(devname, sizeof(devname), "netmap:%s%d%s%s@conf:host-rings=%d", ns->iface,
398  ring, strlen(optstr) ? "/" : "", optstr, ns->threads);
399  } else {
400  /* Software (host) ring, but not initial open of ring 0 */
401  snprintf(devname, sizeof(devname), "netmap:%s%d%s%s", ns->iface, ring,
402  strlen(optstr) ? "/" : "", optstr);
403  }
404  SCLogDebug("device with SW-ring enabled (devname): %s", devname);
405  } else if (ring == 0 && soft) {
406  /* Ring 0 of HW endpoint, and other endpoint is SW stack,
407  * so request SW host stack rings to match HW rings count.
408  */
409  snprintf(devname, sizeof(devname), "netmap:%s-%d%s%s@conf:host-rings=%d", ns->iface,
410  ring, strlen(optstr) ? "/" : "", optstr, ns->threads);
411  SCLogDebug("device with HW-ring enabled (devname): %s", devname);
412  } else {
413  /* Hardware ring other than ring 0, or both endpoints are HW
414  * and there is no host stack (SW) endpoint */
415  snprintf(devname, sizeof(devname), "netmap:%s-%d%s%s", ns->iface, ring,
416  strlen(optstr) ? "/" : "", optstr);
417  SCLogDebug("device with HW-ring enabled (devname): %s", devname);
418  }
419  }
420 
421  strlcpy(pdev->ifname, ns->iface, sizeof(pdev->ifname));
422 
423  /* have the netmap API parse device name and prepare the port descriptor for us */
424  pdev->nmd = nmport_prepare(devname);
425 
426  if (pdev->nmd != NULL) {
427  /* For RX devices, set the nr_mode flag we need on the netmap port TX rings prior to opening
428  */
429  if (read) {
430  pdev->nmd->reg.nr_flags |= NR_NO_TX_POLL;
431  }
432 
433  /* Now attempt to actually open the netmap port descriptor */
434  if (nmport_open_desc(pdev->nmd) < 0) {
435  /* the open failed, so clean-up the descriptor and fall through to error handler */
436  nmport_close(pdev->nmd);
437  pdev->nmd = NULL;
438  }
439  }
440 
441  if (pdev->nmd == NULL) {
442  if (errno == EINVAL) {
443  if (opt_z[0] == 'z') {
444  SCLogNotice(
445  "%s: dev '%s' got EINVAL: going to retry without 'z'", base_name, devname);
446  opt_z = "";
447  goto retry;
448  } else if (opt_x[0] == 'x') {
449  SCLogNotice(
450  "%s: dev '%s' got EINVAL: going to retry without 'x'", base_name, devname);
451  opt_x = "";
452  goto retry;
453  }
454  }
455 
456  SCMutexUnlock(&netmap_devlist_lock);
457  NetmapCloseAll();
458  FatalError("opening devname %s failed: %s", devname, strerror(errno));
459  }
460 
461  /* Work around bug in libnetmap library where "cur_{r,t}x_ring" values not initialized */
462  SCLogDebug("%s -- cur rings: [%d, %d] first rings: [%d, %d]", devname, pdev->nmd->cur_rx_ring,
463  pdev->nmd->cur_tx_ring, pdev->nmd->first_rx_ring, pdev->nmd->first_tx_ring);
464  pdev->nmd->cur_rx_ring = pdev->nmd->first_rx_ring;
465  pdev->nmd->cur_tx_ring = pdev->nmd->first_tx_ring;
466 
467  SCLogInfo("%s: %s opened [fd: %d]", devname, ns->iface, pdev->nmd->fd);
468 
469  pdev->direction = direction;
470  pdev->ring = ring;
471  SCMutexInit(&pdev->netmap_dev_lock, NULL);
472  TAILQ_INSERT_TAIL(&netmap_devlist, pdev, next);
473 
474  SCMutexUnlock(&netmap_devlist_lock);
475  *pdevice = pdev;
476 
477  return 0;
478 error:
479  return -1;
480 }
481 
482 /**
483  * \brief PcapDumpCounters
484  * \param ntv
485  */
486 static inline void NetmapDumpCounters(NetmapThreadVars *ntv)
487 {
488  StatsAddUI64(ntv->tv, ntv->capture_kernel_packets, ntv->pkts);
489  StatsAddUI64(ntv->tv, ntv->capture_kernel_drops, ntv->drops);
490  (void) SC_ATOMIC_ADD(ntv->livedev->drop, ntv->drops);
491  (void) SC_ATOMIC_ADD(ntv->livedev->pkts, ntv->pkts);
492  ntv->drops = 0;
493  ntv->pkts = 0;
494 }
495 
496 /**
497  * \brief Init function for ReceiveNetmap.
498  * \param tv pointer to ThreadVars
499  * \param initdata pointer to the interface passed from the user
500  * \param data pointer gets populated with NetmapThreadVars
501  */
502 static TmEcode ReceiveNetmapThreadInit(ThreadVars *tv, const void *initdata, void **data)
503 {
504  SCEnter();
505 
506  NetmapIfaceConfig *aconf = (NetmapIfaceConfig *)initdata;
507  if (initdata == NULL) {
508  SCLogError("initdata == NULL");
510  }
511 
512  NetmapThreadVars *ntv = SCCalloc(1, sizeof(*ntv));
513  if (unlikely(ntv == NULL)) {
514  SCLogError("Memory allocation failed");
515  goto error;
516  }
517 
518  ntv->livedev = LiveGetDevice(aconf->iface_name);
519  if (ntv->livedev == NULL) {
520  SCLogError("Unable to find Live device");
521  goto error_ntv;
522  }
523 
524  ntv->tv = tv;
525  ntv->checksum_mode = aconf->in.checksum_mode;
526  ntv->copy_mode = aconf->in.copy_mode;
527 
528  /* enable zero-copy mode for workers runmode */
529  char const *active_runmode = RunmodeGetActive();
530  if (strcmp("workers", active_runmode) == 0) {
531  ntv->flags |= NETMAP_FLAG_ZERO_COPY;
532  SCLogDebug("Enabling zero copy mode for %s", aconf->in.iface);
533  } else if (strcmp("autofp", active_runmode) == 0) {
534  ntv->flags |= NETMAP_FLAG_EXCL_RING_ACCESS;
535  }
536 
537  /* Need to insure open of ring 0 conveys requested ring count for open */
538  bool soft = aconf->in.sw_ring || aconf->out.sw_ring;
539  if (NetmapOpen(&aconf->in, &ntv->ifsrc, 1, 1, (ntv->flags & NETMAP_FLAG_ZERO_COPY) != 0,
540  soft) != 0) {
541  goto error_ntv;
542  }
543 
544  if (aconf->in.copy_mode != NETMAP_COPY_MODE_NONE) {
545  if (NetmapOpen(&aconf->out, &ntv->ifdst, 1, 0, (ntv->flags & NETMAP_FLAG_ZERO_COPY) != 0,
546  soft) != 0) {
547  goto error_src;
548  }
549  }
550 
551  /* basic counters */
552  ntv->capture_kernel_packets = StatsRegisterCounter("capture.kernel_packets",
553  ntv->tv);
554  ntv->capture_kernel_drops = StatsRegisterCounter("capture.kernel_drops",
555  ntv->tv);
556 
557  if (aconf->in.bpf_filter) {
558  SCLogConfig("%s: using BPF '%s'", ntv->ifsrc->ifname, aconf->in.bpf_filter);
559  char errbuf[PCAP_ERRBUF_SIZE];
560  if (SCBPFCompile(default_packet_size, /* snaplen_arg */
561  LINKTYPE_ETHERNET, /* linktype_arg */
562  &ntv->bpf_prog, /* program */
563  aconf->in.bpf_filter, /* const char *buf */
564  1, /* optimize */
565  PCAP_NETMASK_UNKNOWN, /* mask */
566  errbuf,
567  sizeof(errbuf)) == -1)
568  {
569  SCLogError("%s: failed to compile BPF \"%s\": %s", ntv->ifsrc->ifname,
570  aconf->in.bpf_filter, errbuf);
571  goto error_dst;
572  }
573  }
574 
575  SCLogDebug("thread: %s polling on fd: %d", tv->name, ntv->ifsrc->nmd->fd);
576 
578 
579  *data = (void *)ntv;
580  aconf->DerefFunc(aconf);
582 
583 error_dst:
584  if (aconf->in.copy_mode != NETMAP_COPY_MODE_NONE) {
585  NetmapClose(ntv->ifdst);
586  }
587 
588 error_src:
589  NetmapClose(ntv->ifsrc);
590 
591 error_ntv:
592  SCFree(ntv);
593 
594 error:
595  aconf->DerefFunc(aconf);
597 }
598 
599 /**
600  * \brief Output packet to destination interface or drop.
601  * \param ntv Thread local variables.
602  * \param p Source packet.
603  */
604 static TmEcode NetmapWritePacket(NetmapThreadVars *ntv, Packet *p)
605 {
606  if (ntv->copy_mode == NETMAP_COPY_MODE_IPS) {
607  if (PacketCheckAction(p, ACTION_DROP)) {
608  return TM_ECODE_OK;
609  }
610  }
611  DEBUG_VALIDATE_BUG_ON(ntv->ifdst == NULL);
612 
613  /* Lock the destination netmap ring while writing to it */
614  if (ntv->flags & NETMAP_FLAG_EXCL_RING_ACCESS) {
615  SCMutexLock(&ntv->ifdst->netmap_dev_lock);
616  }
617 
618  int write_tries = 0;
619 try_write:
620  /* attempt to write the packet into the netmap ring buffer(s) */
621  if (nmport_inject(ntv->ifdst->nmd, GET_PKT_DATA(p), GET_PKT_LEN(p)) == 0) {
622 
623  /* writing the packet failed, but ask kernel to sync TX rings
624  * for us as the ring buffers may simply be full */
625  (void)ioctl(ntv->ifdst->nmd->fd, NIOCTXSYNC, 0);
626 
627  /* Try write up to 2 more times before giving up */
628  if (write_tries < 3) {
629  write_tries++;
630  goto try_write;
631  }
632 
633  if (ntv->flags & NETMAP_FLAG_EXCL_RING_ACCESS) {
634  SCMutexUnlock(&ntv->ifdst->netmap_dev_lock);
635  }
636  SCLogDebug("failed to send %s -> %s", ntv->ifsrc->ifname, ntv->ifdst->ifname);
637  ntv->drops++;
638  return TM_ECODE_FAILED;
639  }
640 
641  SCLogDebug("sent successfully: %s(%d)->%s(%d) (%u)", ntv->ifsrc->ifname, ntv->ifsrc->ring,
642  ntv->ifdst->ifname, ntv->ifdst->ring, GET_PKT_LEN(p));
643 
644  /* Instruct netmap to push the data on the TX ring on the destination port */
645  (void)ioctl(ntv->ifdst->nmd->fd, NIOCTXSYNC, 0);
646  if (ntv->flags & NETMAP_FLAG_EXCL_RING_ACCESS) {
647  SCMutexUnlock(&ntv->ifdst->netmap_dev_lock);
648  }
649  return TM_ECODE_OK;
650 }
651 
652 /**
653  * \brief Packet release routine.
654  * \param p Packet.
655  */
656 static void NetmapReleasePacket(Packet *p)
657 {
658  NetmapThreadVars *ntv = (NetmapThreadVars *)p->netmap_v.ntv;
659 
660  if ((ntv->copy_mode != NETMAP_COPY_MODE_NONE) && !PKT_IS_PSEUDOPKT(p)) {
661  NetmapWritePacket(ntv, p);
662  }
663 
665 }
666 
667 static void NetmapProcessPacket(NetmapThreadVars *ntv, const struct nm_pkthdr *ph)
668 {
669  if (ntv->bpf_prog.bf_len) {
670  struct pcap_pkthdr pkthdr = { {0, 0}, ph->len, ph->len };
671  if (pcap_offline_filter(&ntv->bpf_prog, &pkthdr, ph->buf) == 0) {
672  return;
673  }
674  }
675 
677  if (unlikely(p == NULL)) {
678  return;
679  }
680 
682  p->livedev = ntv->livedev;
684  p->ts = SCTIME_FROM_TIMEVAL(&ph->ts);
685  ntv->pkts++;
686  ntv->bytes += ph->len;
687 
688  if (ntv->flags & NETMAP_FLAG_ZERO_COPY) {
689  if (PacketSetData(p, (uint8_t *)ph->buf, ph->len) == -1) {
690  TmqhOutputPacketpool(ntv->tv, p);
691  return;
692  }
693  } else {
694  if (PacketCopyData(p, (uint8_t *)ph->buf, ph->len) == -1) {
695  TmqhOutputPacketpool(ntv->tv, p);
696  return;
697  }
698  }
699 
700  p->ReleasePacket = NetmapReleasePacket;
701  p->netmap_v.ntv = ntv;
702 
703  SCLogDebug("pktlen: %" PRIu32 " (pkt %p, pkt data %p)",
704  GET_PKT_LEN(p), p, GET_PKT_DATA(p));
705 
706  (void)TmThreadsSlotProcessPkt(ntv->tv, ntv->slot, p);
707 }
708 
709 /**
710  * \brief Copy netmap rings data into Packet structures.
711  * \param *d nmport_d (or nm_desc) netmap if structure.
712  * \param cnt int count of packets to read (-1 = all).
713  * \param *ntv NetmapThreadVars.
714  */
715 static TmEcode NetmapReadPackets(struct nmport_d *d, int cnt, NetmapThreadVars *ntv)
716 {
717  struct nm_pkthdr hdr;
718  int last_ring = d->last_rx_ring - d->first_rx_ring + 1;
719  int cur_ring, got = 0, cur_rx_ring = d->cur_rx_ring;
720 
721  memset(&hdr, 0, sizeof(hdr));
722  hdr.flags = NM_MORE_PKTS;
723 
724  if (cnt == 0)
725  cnt = -1;
726 
727  for (cur_ring = 0; cur_ring < last_ring && cnt != got; cur_ring++, cur_rx_ring++) {
728  struct netmap_ring *ring;
729 
730  if (cur_rx_ring > d->last_rx_ring)
731  cur_rx_ring = d->first_rx_ring;
732 
733  ring = NETMAP_RXRING(d->nifp, cur_rx_ring);
734 
735  /* cycle through the non-empty ring slots to fetch their data */
736  for (; !nm_ring_empty(ring) && cnt != got; got++) {
737  u_int idx, i;
738  u_char *oldbuf;
739  struct netmap_slot *slot;
740 
741  if (hdr.buf) { /* from previous round */
742  NetmapProcessPacket(ntv, &hdr);
743  }
744 
745  i = ring->cur;
746  slot = &ring->slot[i];
747  idx = slot->buf_idx;
748  d->cur_rx_ring = cur_rx_ring;
749  hdr.slot = slot;
750  oldbuf = hdr.buf = (u_char *)NETMAP_BUF(ring, idx);
751  hdr.len = hdr.caplen = slot->len;
752 
753  /* loop through the ring slots to get packet data */
754  while (slot->flags & NS_MOREFRAG) {
755  /* packet can be fragmented across multiple slots, */
756  /* so loop until we find the slot with the flag */
757  /* cleared, signalling the end of the packet data. */
758  u_char *nbuf;
759  u_int oldlen = slot->len;
760  i = nm_ring_next(ring, i);
761  slot = &ring->slot[i];
762  hdr.len += slot->len;
763  nbuf = (u_char *)NETMAP_BUF(ring, slot->buf_idx);
764 
765  if (oldbuf != NULL && nbuf - oldbuf == ring->nr_buf_size &&
766  oldlen == ring->nr_buf_size) {
767  hdr.caplen += slot->len;
768  oldbuf = nbuf;
769  } else {
770  oldbuf = NULL;
771  }
772  }
773 
774  hdr.ts = ring->ts;
775  ring->head = ring->cur = nm_ring_next(ring, i);
776  }
777  }
778 
779  if (hdr.buf) { /* from previous round */
780  hdr.flags = 0;
781  NetmapProcessPacket(ntv, &hdr);
782  }
783  return got;
784 }
785 
786 /**
787  * \brief Main netmap reading loop function
788  */
789 static TmEcode ReceiveNetmapLoop(ThreadVars *tv, void *data, void *slot)
790 {
791  SCEnter();
792 
793  TmSlot *s = (TmSlot *)slot;
794  NetmapThreadVars *ntv = (NetmapThreadVars *)data;
795  struct pollfd fds;
796 
797  ntv->slot = s->slot_next;
798  fds.fd = ntv->ifsrc->nmd->fd;
799  fds.events = POLLIN;
800 
801  SCLogDebug("thread %s polling on %d", tv->name, fds.fd);
802 
803  // Indicate that the thread is actually running its application level code (i.e., it can poll
804  // packets)
806 
807  for(;;) {
808  if (unlikely(suricata_ctl_flags != 0)) {
809  break;
810  }
811 
812  /* make sure we have at least one packet in the packet pool,
813  * to prevent us from alloc'ing packets at line rate */
814  PacketPoolWait();
815 
816  int r = poll(&fds, 1, POLL_TIMEOUT);
817  if (r < 0) {
818  /* error */
819  if (errno != EINTR)
820  SCLogError("%s: error polling netmap: %s", ntv->ifsrc->ifname, strerror(errno));
821  continue;
822 
823  } else if (r == 0) {
824  /* no events, timeout */
825  /* sync counters */
826  NetmapDumpCounters(ntv);
828 
829  /* poll timed out, lets handle the timeout */
830  TmThreadsCaptureHandleTimeout(tv, NULL);
831  continue;
832  }
833 
834  if (unlikely(fds.revents & POLL_EVENTS)) {
835  if (fds.revents & POLLERR) {
836  SCLogError("%s: error reading netmap data via polling: %s", ntv->ifsrc->ifname,
837  strerror(errno));
838  } else if (fds.revents & POLLNVAL) {
839  SCLogError("%s: invalid polling request", ntv->ifsrc->ifname);
840  }
841  continue;
842  }
843 
844  if (likely(fds.revents & POLLIN)) {
845  /* have data on RX ring, so copy to Packet for processing */
846  NetmapReadPackets(ntv->ifsrc->nmd, -1, ntv);
847  }
848 
849  NetmapDumpCounters(ntv);
851  }
852 
853  NetmapDumpCounters(ntv);
856 }
857 
858 /**
859  * \brief This function prints stats to the screen at exit.
860  * \param tv pointer to ThreadVars
861  * \param data pointer that gets cast into NetmapThreadVars for ntv
862  */
863 static void ReceiveNetmapThreadExitStats(ThreadVars *tv, void *data)
864 {
865  SCEnter();
866  NetmapThreadVars *ntv = (NetmapThreadVars *)data;
867 
868  NetmapDumpCounters(ntv);
869  SCLogPerf("%s: (%s) packets %" PRIu64 ", dropped %" PRIu64 ", bytes %" PRIu64 "",
870  ntv->ifsrc->ifname, tv->name,
871  StatsGetLocalCounterValue(tv, ntv->capture_kernel_packets),
872  StatsGetLocalCounterValue(tv, ntv->capture_kernel_drops), ntv->bytes);
873 }
874 
875 /**
876  * \brief
877  * \param tv
878  * \param data Pointer to NetmapThreadVars.
879  */
880 static TmEcode ReceiveNetmapThreadDeinit(ThreadVars *tv, void *data)
881 {
882  SCEnter();
883 
884  NetmapThreadVars *ntv = (NetmapThreadVars *)data;
885 
886  if (ntv->ifsrc) {
887  NetmapClose(ntv->ifsrc);
888  ntv->ifsrc = NULL;
889  }
890  if (ntv->ifdst) {
891  NetmapClose(ntv->ifdst);
892  ntv->ifdst = NULL;
893  }
894  if (ntv->bpf_prog.bf_insns) {
895  SCBPFFree(&ntv->bpf_prog);
896  }
897 
898  SCFree(ntv);
899 
901 }
902 
903 /**
904  * \brief Prepare netmap decode thread.
905  * \param tv Thread local variables.
906  * \param initdata Thread config.
907  * \param data Pointer to DecodeThreadVars placed here.
908  */
909 static TmEcode DecodeNetmapThreadInit(ThreadVars *tv, const void *initdata, void **data)
910 {
911  SCEnter();
912 
914  if (dtv == NULL)
916 
918 
919  *data = (void *)dtv;
920 
922 }
923 
924 /**
925  * \brief This function passes off to link type decoders.
926  *
927  * \param t pointer to ThreadVars
928  * \param p pointer to the current packet
929  * \param data pointer that gets cast into NetmapThreadVars for ntv
930  */
931 static TmEcode DecodeNetmap(ThreadVars *tv, Packet *p, void *data)
932 {
933  SCEnter();
934 
936 
938 
939  /* update counters */
941 
943 
945 
947 }
948 
949 /**
950  * \brief
951  * \param tv
952  * \param data Pointer to DecodeThreadVars.
953  */
954 static TmEcode DecodeNetmapThreadDeinit(ThreadVars *tv, void *data)
955 {
956  SCEnter();
957 
958  if (data != NULL)
959  DecodeThreadVarsFree(tv, data);
960 
962 }
963 
964 /**
965  * \brief Registration Function for ReceiveNetmap.
966  */
968 {
969  tmm_modules[TMM_RECEIVENETMAP].name = "ReceiveNetmap";
970  tmm_modules[TMM_RECEIVENETMAP].ThreadInit = ReceiveNetmapThreadInit;
971  tmm_modules[TMM_RECEIVENETMAP].PktAcqLoop = ReceiveNetmapLoop;
972  tmm_modules[TMM_RECEIVENETMAP].ThreadExitPrintStats = ReceiveNetmapThreadExitStats;
973  tmm_modules[TMM_RECEIVENETMAP].ThreadDeinit = ReceiveNetmapThreadDeinit;
976 }
977 
978 /**
979  * \brief Registration Function for DecodeNetmap.
980  */
982 {
983  tmm_modules[TMM_DECODENETMAP].name = "DecodeNetmap";
984  tmm_modules[TMM_DECODENETMAP].ThreadInit = DecodeNetmapThreadInit;
985  tmm_modules[TMM_DECODENETMAP].Func = DecodeNetmap;
986  tmm_modules[TMM_DECODENETMAP].ThreadDeinit = DecodeNetmapThreadDeinit;
989 }
990 
991 #endif /* HAVE_NETMAP */
992 
993 /**
994 * @}
995 */
TmModule_::cap_flags
uint8_t cap_flags
Definition: tm-modules.h:74
PacketCheckAction
bool PacketCheckAction(const Packet *p, const uint8_t a)
Definition: packet.c:48
tm-threads.h
ThreadVars_::name
char name[16]
Definition: threadvars.h:64
PacketFreeOrRelease
void PacketFreeOrRelease(Packet *p)
Return a packet to where it was allocated.
Definition: decode.c:250
SC_ATOMIC_INIT
#define SC_ATOMIC_INIT(name)
wrapper for initializing an atomic variable.
Definition: util-atomic.h:314
PacketCopyData
int PacketCopyData(Packet *p, const uint8_t *pktdata, uint32_t pktlen)
Copy data to Packet payload and set packet length.
Definition: decode.c:351
PKT_IS_PSEUDOPKT
#define PKT_IS_PSEUDOPKT(p)
return 1 if the packet is a pseudo packet
Definition: decode.h:1334
util-bpf.h
unlikely
#define unlikely(expr)
Definition: util-optimize.h:35
NetmapIfaceSettings_::checksum_mode
ChecksumValidationMode checksum_mode
Definition: source-netmap.h:51
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:269
TmThreadsSetFlag
void TmThreadsSetFlag(ThreadVars *tv, uint32_t flag)
Set a thread flag.
Definition: tm-threads.c:99
next
struct HtpBodyChunk_ * next
Definition: app-layer-htp.h:0
action-globals.h
NETMAP_COPY_MODE_NONE
@ NETMAP_COPY_MODE_NONE
Definition: source-netmap.h:30
LiveDevice_
Definition: util-device.h:50
SC_ATOMIC_ADD
#define SC_ATOMIC_ADD(name, val)
add a value to our atomic variable
Definition: util-atomic.h:332
THV_RUNNING
#define THV_RUNNING
Definition: threadvars.h:54
TAILQ_FOREACH
#define TAILQ_FOREACH(var, head, field)
Definition: queue.h:252
SCMutexLock
#define SCMutexLock(mut)
Definition: threads-debug.h:117
NetmapIfaceConfig_::out
NetmapIfaceSettings out
Definition: source-netmap.h:64
util-privs.h
SCMUTEX_INITIALIZER
#define SCMUTEX_INITIALIZER
Definition: threads-debug.h:121
TAILQ_INSERT_TAIL
#define TAILQ_INSERT_TAIL(head, elm, field)
Definition: queue.h:294
PacketDecodeFinalize
void PacketDecodeFinalize(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p)
Finalize decoding of a packet.
Definition: decode.c:206
RunmodeGetActive
char * RunmodeGetActive(void)
Definition: runmodes.c:206
TmModuleReceiveNetmapRegister
void TmModuleReceiveNetmapRegister(void)
Definition: source-netmap.c:74
TmqhOutputPacketpool
void TmqhOutputPacketpool(ThreadVars *t, Packet *p)
Definition: tmqh-packetpool.c:315
TM_ECODE_FAILED
@ TM_ECODE_FAILED
Definition: tm-threads-common.h:85
NetmapIfaceSettings_::iface
char iface[NETMAP_IFACE_NAME_LENGTH]
Definition: source-netmap.h:40
NetmapIfaceSettings_::ips
bool ips
Definition: source-netmap.h:46
TmModule_::PktAcqLoop
TmEcode(* PktAcqLoop)(ThreadVars *, void *, void *)
Definition: tm-modules.h:55
TM_ECODE_OK
@ TM_ECODE_OK
Definition: tm-threads-common.h:84
strlcpy
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: util-strlcpyu.c:43
TmModule_::ThreadDeinit
TmEcode(* ThreadDeinit)(ThreadVars *, void *)
Definition: tm-modules.h:50
TAILQ_ENTRY
#define TAILQ_ENTRY(type)
Definition: queue.h:239
Packet_::datalink
int datalink
Definition: decode.h:622
NetmapGetRSSCount
int NetmapGetRSSCount(const char *ifname)
PKT_SET_SRC
#define PKT_SET_SRC(p, src_val)
Definition: decode.h:1337
DecodeRegisterPerfCounters
void DecodeRegisterPerfCounters(DecodeThreadVars *dtv, ThreadVars *tv)
Definition: decode.c:602
TAILQ_HEAD_INITIALIZER
#define TAILQ_HEAD_INITIALIZER(head)
Definition: queue.h:236
TmModuleDecodeNetmapRegister
void TmModuleDecodeNetmapRegister(void)
Registration Function for DecodeNetmap.
Definition: source-netmap.c:84
NetmapIfaceConfig_::DerefFunc
void(* DerefFunc)(void *)
Definition: source-netmap.h:67
PKT_SRC_WIRE
@ PKT_SRC_WIRE
Definition: decode.h:55
NetmapIfaceSettings_::real
bool real
Definition: source-netmap.h:45
Packet_::ts
SCTime_t ts
Definition: decode.h:530
SCMutexUnlock
#define SCMutexUnlock(mut)
Definition: threads-debug.h:119
NetmapIfaceSettings_::sw_ring
bool sw_ring
Definition: source-netmap.h:43
LiveGetDevice
LiveDevice * LiveGetDevice(const char *name)
Get a pointer to the device at idx.
Definition: util-device.c:248
SCEnter
#define SCEnter(...)
Definition: util-debug.h:271
GET_PKT_DATA
#define GET_PKT_DATA(p)
Definition: decode.h:214
ThreadVars_
Per thread variable structure.
Definition: threadvars.h:57
SCTIME_FROM_TIMEVAL
#define SCTIME_FROM_TIMEVAL(tv)
Definition: util-time.h:79
TmModule_::Func
TmEcode(* Func)(ThreadVars *, Packet *, void *)
Definition: tm-modules.h:53
NetmapIfaceSettings_
Definition: source-netmap.h:38
TMM_DECODENETMAP
@ TMM_DECODENETMAP
Definition: tm-threads-common.h:61
BUG_ON
#define BUG_ON(x)
Definition: suricata-common.h:300
NetmapIfaceSettings_::threads
uint16_t threads
Definition: source-netmap.h:49
StatsGetLocalCounterValue
uint64_t StatsGetLocalCounterValue(ThreadVars *tv, uint16_t id)
Get the value of the local copy of the counter that hold this id.
Definition: counters.c:1260
SC_ATOMIC_DECLARE
#define SC_ATOMIC_DECLARE(type, name)
wrapper for declaring atomic variables.
Definition: util-atomic.h:280
PacketPoolWait
void PacketPoolWait(void)
Definition: tmqh-packetpool.c:80
Packet_
Definition: decode.h:482
TM_FLAG_DECODE_TM
#define TM_FLAG_DECODE_TM
Definition: tm-modules.h:33
tmm_modules
TmModule tmm_modules[TMM_SIZE]
Definition: tm-modules.c:33
GET_PKT_LEN
#define GET_PKT_LEN(p)
Definition: decode.h:213
NETMAP_COPY_MODE_IPS
@ NETMAP_COPY_MODE_IPS
Definition: source-netmap.h:32
source-netmap.h
TmSlot_
Definition: tm-threads.h:53
Packet_::livedev
struct LiveDevice_ * livedev
Definition: decode.h:601
TmEcode
TmEcode
Definition: tm-threads-common.h:83
NetmapIfaceSettings_::promisc
bool promisc
Definition: source-netmap.h:44
TmModule_::name
const char * name
Definition: tm-modules.h:45
SCLogInfo
#define SCLogInfo(...)
Macro used to log INFORMATIONAL messages.
Definition: util-debug.h:224
TAILQ_FOREACH_SAFE
#define TAILQ_FOREACH_SAFE(var, head, field, tvar)
Definition: queue.h:329
SCMutexInit
#define SCMutexInit(mut, mutattrs)
Definition: threads-debug.h:116
TM_FLAG_RECEIVE_TM
#define TM_FLAG_RECEIVE_TM
Definition: tm-modules.h:32
dtv
DecodeThreadVars * dtv
Definition: fuzz_decodepcapfile.c:33
default_packet_size
uint32_t default_packet_size
Definition: decode.c:77
Packet_::ReleasePacket
void(* ReleasePacket)(struct Packet_ *)
Definition: decode.h:574
cnt
uint32_t cnt
Definition: tmqh-packetpool.h:7
NetmapIfaceSettings_::bpf_filter
const char * bpf_filter
Definition: source-netmap.h:52
flags
uint8_t flags
Definition: decode-gre.h:0
DecodeThreadVarsFree
void DecodeThreadVarsFree(ThreadVars *tv, DecodeThreadVars *dtv)
Definition: decode.c:791
NetmapIfaceConfig_
Definition: source-netmap.h:56
ChecksumValidationMode
ChecksumValidationMode
Definition: decode.h:45
suricata-common.h
packet.h
ACTION_DROP
#define ACTION_DROP
Definition: action-globals.h:30
SCLogPerf
#define SCLogPerf(...)
Definition: util-debug.h:230
SCBPFFree
void SCBPFFree(struct bpf_program *program)
Definition: util-bpf.c:56
TmModule_::ThreadInit
TmEcode(* ThreadInit)(ThreadVars *, const void *, void **)
Definition: tm-modules.h:48
FatalError
#define FatalError(...)
Definition: util-debug.h:502
tv
ThreadVars * tv
Definition: fuzz_decodepcapfile.c:32
TmModule_::ThreadExitPrintStats
void(* ThreadExitPrintStats)(ThreadVars *, void *)
Definition: tm-modules.h:49
util-validate.h
TMM_RECEIVENETMAP
@ TMM_RECEIVENETMAP
Definition: tm-threads-common.h:60
StatsAddUI64
void StatsAddUI64(ThreadVars *tv, uint16_t id, uint64_t x)
Adds a value of type uint64_t to the local counter.
Definition: counters.c:146
SCLogConfig
struct SCLogConfig_ SCLogConfig
Holds the config state used by the logging api.
POLL_TIMEOUT
#define POLL_TIMEOUT
Definition: source-af-packet.c:174
SCLogError
#define SCLogError(...)
Macro used to log ERROR messages.
Definition: util-debug.h:261
SCFree
#define SCFree(p)
Definition: util-mem.h:61
NetmapIfaceConfig_::iface_name
char iface_name[NETMAP_IFACE_NAME_LENGTH]
Definition: source-netmap.h:58
DecodeThreadVars_
Structure to hold thread specific data for all decode modules.
Definition: decode.h:946
NetmapIfaceSettings_::copy_mode
int copy_mode
Definition: source-netmap.h:50
util-ioctl.h
DecodeThreadVarsAlloc
DecodeThreadVars * DecodeThreadVarsAlloc(ThreadVars *tv)
Alloc and setup DecodeThreadVars.
Definition: decode.c:773
TAILQ_HEAD
#define TAILQ_HEAD(name, type)
Definition: queue.h:230
PacketSetData
int PacketSetData(Packet *p, const uint8_t *pktdata, uint32_t pktlen)
Set data for Packet and set length when zero copy is used.
Definition: decode.c:811
PacketPoolGetPacket
Packet * PacketPoolGetPacket(void)
Get a new packet from the packet pool.
Definition: tmqh-packetpool.c:127
SCBPFCompile
int SCBPFCompile(int snaplen_arg, int linktype_arg, struct bpf_program *program, const char *buf, int optimize, uint32_t mask, char *errbuf, size_t errbuf_len)
Definition: util-bpf.c:62
NetmapIfaceConfig_::in
NetmapIfaceSettings in
Definition: source-netmap.h:61
suricata.h
likely
#define likely(expr)
Definition: util-optimize.h:32
TmSlot_::slot_next
struct TmSlot_ * slot_next
Definition: tm-threads.h:62
StatsSyncCountersIfSignalled
void StatsSyncCountersIfSignalled(ThreadVars *tv)
Definition: counters.c:454
SCLogNotice
#define SCLogNotice(...)
Macro used to log NOTICE messages.
Definition: util-debug.h:237
StatsRegisterCounter
uint16_t StatsRegisterCounter(const char *name, struct ThreadVars_ *tv)
Registers a normal, unqualified counter.
Definition: counters.c:961
SCCalloc
#define SCCalloc(nm, sz)
Definition: util-mem.h:53
SCReturnInt
#define SCReturnInt(x)
Definition: util-debug.h:275
SCMutexDestroy
#define SCMutexDestroy
Definition: threads-debug.h:120
SCMutex
#define SCMutex
Definition: threads-debug.h:114
SC_CAP_NET_RAW
#define SC_CAP_NET_RAW
Definition: util-privs.h:32
DEBUG_VALIDATE_BUG_ON
#define DEBUG_VALIDATE_BUG_ON(exp)
Definition: util-validate.h:102
DecodeEthernet
int DecodeEthernet(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, const uint8_t *pkt, uint32_t len)
Definition: decode-ethernet.c:42
TmModule_::flags
uint8_t flags
Definition: tm-modules.h:77
DecodeUpdatePacketCounters
void DecodeUpdatePacketCounters(ThreadVars *tv, const DecodeThreadVars *dtv, const Packet *p)
Definition: decode.c:739
LINKTYPE_ETHERNET
#define LINKTYPE_ETHERNET
Definition: decode.h:1248
suricata_ctl_flags
volatile uint8_t suricata_ctl_flags
Definition: suricata.c:171