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662dccd8 | 1 | /* Copyright (C) 2011,2012 Open Information Security Foundation |
c45d8985 EL |
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 | ||
a6457262 EL |
18 | /** |
19 | * \defgroup afppacket AF_PACKET running mode | |
20 | * | |
21 | * @{ | |
22 | */ | |
23 | ||
c45d8985 EL |
24 | /** |
25 | * \file | |
26 | * | |
27 | * \author Eric Leblond <eric@regit.org> | |
28 | * | |
29 | * AF_PACKET socket acquisition support | |
30 | * | |
e80b30c0 EL |
31 | * \todo watch other interface event to detect suppression of the monitored |
32 | * interface | |
c45d8985 EL |
33 | */ |
34 | ||
35 | #include "suricata-common.h" | |
e80b30c0 | 36 | #include "config.h" |
c45d8985 EL |
37 | #include "suricata.h" |
38 | #include "decode.h" | |
39 | #include "packet-queue.h" | |
40 | #include "threads.h" | |
41 | #include "threadvars.h" | |
42 | #include "tm-queuehandlers.h" | |
43 | #include "tm-modules.h" | |
44 | #include "tm-threads.h" | |
45 | #include "tm-threads-common.h" | |
46 | #include "conf.h" | |
47 | #include "util-debug.h" | |
51eb9605 | 48 | #include "util-device.h" |
c45d8985 EL |
49 | #include "util-error.h" |
50 | #include "util-privs.h" | |
e80b30c0 | 51 | #include "util-optimize.h" |
51eb9605 | 52 | #include "util-checksum.h" |
ac56b1bf | 53 | #include "util-ioctl.h" |
c45d8985 EL |
54 | #include "tmqh-packetpool.h" |
55 | #include "source-af-packet.h" | |
34b3f194 | 56 | #include "runmodes.h" |
c45d8985 | 57 | |
e80b30c0 | 58 | #ifdef HAVE_AF_PACKET |
2bc0be6e | 59 | #include <sys/ioctl.h> |
c45d8985 EL |
60 | #include <linux/if_ether.h> |
61 | #include <linux/if_packet.h> | |
62 | #include <linux/if_arp.h> | |
f2a6fb8a EL |
63 | |
64 | #include <pcap/pcap.h> | |
65 | #include <pcap/bpf.h> | |
66 | #include <linux/filter.h> | |
e80b30c0 | 67 | #endif |
c45d8985 | 68 | |
49b7b00f EL |
69 | #include <sys/mman.h> |
70 | ||
c45d8985 EL |
71 | extern uint8_t suricata_ctl_flags; |
72 | extern int max_pending_packets; | |
73 | ||
e80b30c0 EL |
74 | #ifndef HAVE_AF_PACKET |
75 | ||
76 | TmEcode NoAFPSupportExit(ThreadVars *, void *, void **); | |
77 | ||
78 | void TmModuleReceiveAFPRegister (void) { | |
79 | tmm_modules[TMM_RECEIVEAFP].name = "ReceiveAFP"; | |
80 | tmm_modules[TMM_RECEIVEAFP].ThreadInit = NoAFPSupportExit; | |
81 | tmm_modules[TMM_RECEIVEAFP].Func = NULL; | |
82 | tmm_modules[TMM_RECEIVEAFP].ThreadExitPrintStats = NULL; | |
83 | tmm_modules[TMM_RECEIVEAFP].ThreadDeinit = NULL; | |
84 | tmm_modules[TMM_RECEIVEAFP].RegisterTests = NULL; | |
85 | tmm_modules[TMM_RECEIVEAFP].cap_flags = 0; | |
3f1c4efc | 86 | tmm_modules[TMM_RECEIVEAFP].flags = TM_FLAG_RECEIVE_TM; |
e80b30c0 EL |
87 | } |
88 | ||
89 | /** | |
90 | * \brief Registration Function for DecodeAFP. | |
91 | * \todo Unit tests are needed for this module. | |
92 | */ | |
93 | void TmModuleDecodeAFPRegister (void) { | |
94 | tmm_modules[TMM_DECODEAFP].name = "DecodeAFP"; | |
95 | tmm_modules[TMM_DECODEAFP].ThreadInit = NoAFPSupportExit; | |
96 | tmm_modules[TMM_DECODEAFP].Func = NULL; | |
97 | tmm_modules[TMM_DECODEAFP].ThreadExitPrintStats = NULL; | |
98 | tmm_modules[TMM_DECODEAFP].ThreadDeinit = NULL; | |
99 | tmm_modules[TMM_DECODEAFP].RegisterTests = NULL; | |
100 | tmm_modules[TMM_DECODEAFP].cap_flags = 0; | |
bc6cf438 | 101 | tmm_modules[TMM_DECODEAFP].flags = TM_FLAG_DECODE_TM; |
e80b30c0 EL |
102 | } |
103 | ||
104 | /** | |
105 | * \brief this function prints an error message and exits. | |
106 | */ | |
107 | TmEcode NoAFPSupportExit(ThreadVars *tv, void *initdata, void **data) | |
108 | { | |
109 | SCLogError(SC_ERR_NO_AF_PACKET,"Error creating thread %s: you do not have " | |
110 | "support for AF_PACKET enabled, on Linux host please recompile " | |
111 | "with --enable-af-packet", tv->name); | |
112 | exit(EXIT_FAILURE); | |
113 | } | |
114 | ||
115 | #else /* We have AF_PACKET support */ | |
116 | ||
c45d8985 EL |
117 | #define AFP_IFACE_NAME_LENGTH 48 |
118 | ||
119 | #define AFP_STATE_DOWN 0 | |
120 | #define AFP_STATE_UP 1 | |
121 | ||
122 | #define AFP_RECONNECT_TIMEOUT 500000 | |
13f13b6d | 123 | #define AFP_DOWN_COUNTER_INTERVAL 40 |
c45d8985 EL |
124 | |
125 | #define POLL_TIMEOUT 100 | |
126 | ||
f2a6fb8a EL |
127 | /** protect pfring_set_bpf_filter, as it is not thread safe */ |
128 | static SCMutex afpacket_bpf_set_filter_lock = PTHREAD_MUTEX_INITIALIZER; | |
129 | ||
62e63e3f EL |
130 | enum { |
131 | AFP_READ_OK, | |
132 | AFP_READ_FAILURE, | |
133 | AFP_FAILURE, | |
27b5136b | 134 | AFP_KERNEL_DROP, |
62e63e3f EL |
135 | }; |
136 | ||
49b7b00f EL |
137 | union thdr { |
138 | struct tpacket2_hdr *h2; | |
139 | void *raw; | |
140 | }; | |
141 | ||
c45d8985 EL |
142 | /** |
143 | * \brief Structure to hold thread specific variables. | |
144 | */ | |
145 | typedef struct AFPThreadVars_ | |
146 | { | |
147 | /* thread specific socket */ | |
148 | int socket; | |
149 | /* handle state */ | |
150 | unsigned char afp_state; | |
c45d8985 EL |
151 | |
152 | /* data link type for the thread */ | |
153 | int datalink; | |
154 | int cooked; | |
155 | ||
156 | /* counters */ | |
157 | uint32_t pkts; | |
158 | uint64_t bytes; | |
159 | uint32_t errs; | |
160 | ||
ff6365dd EL |
161 | ThreadVars *tv; |
162 | TmSlot *slot; | |
163 | ||
164 | uint8_t *data; /** Per function and thread data */ | |
165 | int datalen; /** Length of per function and thread data */ | |
166 | ||
167 | char iface[AFP_IFACE_NAME_LENGTH]; | |
51eb9605 | 168 | LiveDevice *livedev; |
13f13b6d | 169 | int down_count; |
51eb9605 | 170 | |
f2a6fb8a EL |
171 | /* Filter */ |
172 | char *bpf_filter; | |
173 | ||
e80b30c0 EL |
174 | /* socket buffer size */ |
175 | int buffer_size; | |
df7dbe36 | 176 | int promisc; |
6062e00c | 177 | ChecksumValidationMode checksum_mode; |
e80b30c0 | 178 | |
662dccd8 EL |
179 | /* IPS stuff */ |
180 | char out_iface[AFP_IFACE_NAME_LENGTH]; | |
181 | AFPPeer *mpeer; | |
182 | ||
49b7b00f | 183 | int flags; |
6efd37a3 EL |
184 | uint16_t capture_kernel_packets; |
185 | uint16_t capture_kernel_drops; | |
49b7b00f | 186 | |
e80b30c0 EL |
187 | int cluster_id; |
188 | int cluster_type; | |
c45d8985 | 189 | |
fbca1a4e | 190 | int threads; |
662dccd8 | 191 | int copy_mode; |
fbca1a4e | 192 | |
49b7b00f EL |
193 | struct tpacket_req req; |
194 | unsigned int tp_hdrlen; | |
195 | unsigned int ring_buflen; | |
196 | char *ring_buf; | |
197 | char *frame_buf; | |
198 | unsigned int frame_offset; | |
8879df80 | 199 | int ring_size; |
662dccd8 | 200 | |
c45d8985 EL |
201 | } AFPThreadVars; |
202 | ||
203 | TmEcode ReceiveAFP(ThreadVars *, Packet *, void *, PacketQueue *, PacketQueue *); | |
204 | TmEcode ReceiveAFPThreadInit(ThreadVars *, void *, void **); | |
205 | void ReceiveAFPThreadExitStats(ThreadVars *, void *); | |
206 | TmEcode ReceiveAFPThreadDeinit(ThreadVars *, void *); | |
e80b30c0 | 207 | TmEcode ReceiveAFPLoop(ThreadVars *tv, void *data, void *slot); |
c45d8985 EL |
208 | |
209 | TmEcode DecodeAFPThreadInit(ThreadVars *, void *, void **); | |
210 | TmEcode DecodeAFP(ThreadVars *, Packet *, void *, PacketQueue *, PacketQueue *); | |
211 | ||
f2a6fb8a | 212 | TmEcode AFPSetBPFFilter(AFPThreadVars *ptv); |
662dccd8 | 213 | static int AFPGetIfnumByDev(int fd, const char *ifname, int verbose); |
13f13b6d EL |
214 | static int AFPGetDevFlags(int fd, const char *ifname); |
215 | static int AFPDerefSocket(AFPPeer* peer); | |
216 | static int AFPRefSocket(AFPPeer* peer); | |
f2a6fb8a | 217 | |
c45d8985 EL |
218 | /** |
219 | * \brief Registration Function for RecieveAFP. | |
220 | * \todo Unit tests are needed for this module. | |
221 | */ | |
222 | void TmModuleReceiveAFPRegister (void) { | |
223 | tmm_modules[TMM_RECEIVEAFP].name = "ReceiveAFP"; | |
224 | tmm_modules[TMM_RECEIVEAFP].ThreadInit = ReceiveAFPThreadInit; | |
ff6365dd | 225 | tmm_modules[TMM_RECEIVEAFP].Func = NULL; |
e80b30c0 | 226 | tmm_modules[TMM_RECEIVEAFP].PktAcqLoop = ReceiveAFPLoop; |
c45d8985 EL |
227 | tmm_modules[TMM_RECEIVEAFP].ThreadExitPrintStats = ReceiveAFPThreadExitStats; |
228 | tmm_modules[TMM_RECEIVEAFP].ThreadDeinit = NULL; | |
229 | tmm_modules[TMM_RECEIVEAFP].RegisterTests = NULL; | |
230 | tmm_modules[TMM_RECEIVEAFP].cap_flags = SC_CAP_NET_RAW; | |
cd4705e6 | 231 | tmm_modules[TMM_RECEIVEAFP].flags = TM_FLAG_RECEIVE_TM; |
c45d8985 EL |
232 | } |
233 | ||
a6457262 EL |
234 | |
235 | /** | |
236 | * \defgroup afppeers AFP peers list | |
237 | * | |
238 | * AF_PACKET has an IPS mode were interface are peered: packet from | |
239 | * on interface are sent the peered interface and the other way. The ::AFPPeer | |
240 | * list is maitaining the list of peers. Each ::AFPPeer is storing the needed | |
241 | * information to be able to send packet on the interface. | |
242 | * A element of the list must not be destroyed during the run of Suricata as it | |
243 | * is used by ::Packet and other threads. | |
244 | * | |
245 | * @{ | |
246 | */ | |
247 | ||
662dccd8 EL |
248 | typedef struct AFPPeersList_ { |
249 | TAILQ_HEAD(, AFPPeer_) peers; /**< Head of list of fragments. */ | |
250 | int cnt; | |
251 | int peered; | |
252 | } AFPPeersList; | |
253 | ||
254 | /** | |
a6457262 EL |
255 | * \brief Update the peer. |
256 | * | |
257 | * Update the AFPPeer of a thread ie set new state, socket number | |
258 | * or iface index. | |
259 | * | |
662dccd8 EL |
260 | */ |
261 | void AFPPeerUpdate(AFPThreadVars *ptv) | |
262 | { | |
263 | if (ptv->mpeer == NULL) { | |
264 | return; | |
265 | } | |
266 | SCLogInfo("Updating AFP peer"); | |
267 | (void)SC_ATOMIC_SET(ptv->mpeer->if_idx, AFPGetIfnumByDev(ptv->socket, ptv->iface, 0)); | |
268 | (void)SC_ATOMIC_SET(ptv->mpeer->socket, ptv->socket); | |
269 | (void)SC_ATOMIC_SET(ptv->mpeer->state, ptv->afp_state); | |
270 | } | |
271 | ||
a6457262 EL |
272 | /** |
273 | * \brief Clean and free ressource used by an ::AFPPeer | |
274 | */ | |
662dccd8 EL |
275 | void AFPPeerClean(AFPPeer *peer) |
276 | { | |
277 | if (peer->flags & AFP_SOCK_PROTECT) | |
278 | SCMutexDestroy(&peer->sock_protect); | |
279 | SC_ATOMIC_DESTROY(peer->socket); | |
280 | SC_ATOMIC_DESTROY(peer->if_idx); | |
281 | SC_ATOMIC_DESTROY(peer->state); | |
282 | SCFree(peer); | |
283 | } | |
284 | ||
285 | AFPPeersList peerslist; | |
286 | ||
287 | ||
a6457262 EL |
288 | /** |
289 | * \brief Init the global list of ::AFPPeer | |
290 | */ | |
662dccd8 EL |
291 | TmEcode AFPPeersListInit() |
292 | { | |
293 | SCEnter(); | |
294 | TAILQ_INIT(&peerslist.peers); | |
295 | peerslist.peered = 0; | |
296 | peerslist.cnt = 0; | |
297 | SCReturnInt(TM_ECODE_OK); | |
298 | } | |
299 | ||
a6457262 EL |
300 | /** |
301 | * \brief Check that all ::AFPPeer got a peer | |
302 | * | |
303 | * \retval TM_ECODE_FAILED if some threads are not peered or TM_ECODE_OK else. | |
304 | */ | |
662dccd8 EL |
305 | TmEcode AFPPeersListCheck() |
306 | { | |
307 | #define AFP_PEERS_MAX_TRY 4 | |
308 | #define AFP_PEERS_WAIT 20000 | |
309 | int try = 0; | |
310 | SCEnter(); | |
311 | while (try < AFP_PEERS_MAX_TRY) { | |
312 | if (peerslist.cnt != peerslist.peered) { | |
313 | usleep(AFP_PEERS_WAIT); | |
314 | } else { | |
315 | SCReturnInt(TM_ECODE_OK); | |
316 | } | |
317 | try++; | |
318 | } | |
319 | SCLogError(SC_ERR_AFP_CREATE, "Threads number not equals"); | |
320 | SCReturnInt(TM_ECODE_FAILED); | |
321 | } | |
322 | ||
a6457262 EL |
323 | /** |
324 | * \brief Declare a new AFP thread to AFP peers list. | |
325 | */ | |
662dccd8 EL |
326 | TmEcode AFPPeersListAdd(AFPThreadVars *ptv) |
327 | { | |
328 | SCEnter(); | |
329 | AFPPeer *peer = SCMalloc(sizeof(AFPPeer)); | |
330 | AFPPeer *pitem; | |
ac56b1bf | 331 | int mtu, out_mtu; |
662dccd8 EL |
332 | |
333 | if (peer == NULL) { | |
334 | SCReturnInt(TM_ECODE_FAILED); | |
335 | } | |
336 | memset(peer, 0, sizeof(AFPPeer)); | |
337 | SC_ATOMIC_INIT(peer->socket); | |
13f13b6d | 338 | SC_ATOMIC_INIT(peer->sock_usage); |
662dccd8 EL |
339 | SC_ATOMIC_INIT(peer->if_idx); |
340 | SC_ATOMIC_INIT(peer->state); | |
341 | peer->flags = ptv->flags; | |
342 | ||
343 | if (peer->flags & AFP_SOCK_PROTECT) { | |
344 | SCMutexInit(&peer->sock_protect, NULL); | |
345 | } | |
346 | ||
13f13b6d | 347 | (void)SC_ATOMIC_SET(peer->sock_usage, 0); |
662dccd8 EL |
348 | (void)SC_ATOMIC_SET(peer->state, AFP_STATE_DOWN); |
349 | strlcpy(peer->iface, ptv->iface, AFP_IFACE_NAME_LENGTH); | |
350 | ptv->mpeer = peer; | |
351 | /* add element to iface list */ | |
352 | TAILQ_INSERT_TAIL(&peerslist.peers, peer, next); | |
662dccd8 | 353 | |
13f13b6d EL |
354 | if (ptv->copy_mode != AFP_COPY_MODE_NONE) { |
355 | peerslist.cnt++; | |
356 | ||
357 | /* Iter to find a peer */ | |
358 | TAILQ_FOREACH(pitem, &peerslist.peers, next) { | |
359 | if (pitem->peer) | |
360 | continue; | |
361 | if (strcmp(pitem->iface, ptv->out_iface)) | |
362 | continue; | |
363 | peer->peer = pitem; | |
364 | pitem->peer = peer; | |
365 | mtu = GetIfaceMTU(ptv->iface); | |
366 | out_mtu = GetIfaceMTU(ptv->out_iface); | |
367 | if (mtu != out_mtu) { | |
368 | SCLogError(SC_ERR_AFP_CREATE, | |
369 | "MTU on %s (%d) and %s (%d) are not equal, " | |
370 | "transmission of packets bigger than %d will fail.", | |
371 | ptv->iface, mtu, | |
372 | ptv->out_iface, out_mtu, | |
373 | (out_mtu > mtu) ? mtu : out_mtu); | |
374 | } | |
375 | peerslist.peered += 2; | |
376 | break; | |
ac56b1bf | 377 | } |
662dccd8 EL |
378 | } |
379 | ||
380 | AFPPeerUpdate(ptv); | |
381 | ||
382 | SCReturnInt(TM_ECODE_OK); | |
383 | } | |
384 | ||
a6457262 EL |
385 | /** |
386 | * \brief Clean the global peers list. | |
387 | */ | |
662dccd8 EL |
388 | void AFPPeersListClean() |
389 | { | |
390 | AFPPeer *pitem; | |
391 | ||
392 | while ((pitem = TAILQ_FIRST(&peerslist.peers))) { | |
393 | TAILQ_REMOVE(&peerslist.peers, pitem, next); | |
394 | AFPPeerClean(pitem); | |
395 | } | |
396 | } | |
397 | ||
a6457262 EL |
398 | /** |
399 | * @} | |
400 | */ | |
401 | ||
c45d8985 EL |
402 | /** |
403 | * \brief Registration Function for DecodeAFP. | |
404 | * \todo Unit tests are needed for this module. | |
405 | */ | |
406 | void TmModuleDecodeAFPRegister (void) { | |
407 | tmm_modules[TMM_DECODEAFP].name = "DecodeAFP"; | |
408 | tmm_modules[TMM_DECODEAFP].ThreadInit = DecodeAFPThreadInit; | |
409 | tmm_modules[TMM_DECODEAFP].Func = DecodeAFP; | |
410 | tmm_modules[TMM_DECODEAFP].ThreadExitPrintStats = NULL; | |
411 | tmm_modules[TMM_DECODEAFP].ThreadDeinit = NULL; | |
412 | tmm_modules[TMM_DECODEAFP].RegisterTests = NULL; | |
413 | tmm_modules[TMM_DECODEAFP].cap_flags = 0; | |
bc6cf438 | 414 | tmm_modules[TMM_DECODEAFP].flags = TM_FLAG_DECODE_TM; |
c45d8985 EL |
415 | } |
416 | ||
662dccd8 | 417 | |
e80b30c0 EL |
418 | static int AFPCreateSocket(AFPThreadVars *ptv, char *devname, int verbose); |
419 | ||
6efd37a3 EL |
420 | static inline void AFPDumpCounters(AFPThreadVars *ptv, int forced) |
421 | { | |
422 | if (((ptv->pkts & 0xff) == 0) || forced) { | |
423 | #ifdef PACKET_STATISTICS | |
424 | struct tpacket_stats kstats; | |
425 | socklen_t len = sizeof (struct tpacket_stats); | |
426 | if (getsockopt(ptv->socket, SOL_PACKET, PACKET_STATISTICS, | |
427 | &kstats, &len) > -1) { | |
428 | SCLogDebug("(%s) Kernel: Packets %" PRIu32 ", dropped %" PRIu32 "", | |
4cf6bb3f | 429 | ptv->tv->name, |
6efd37a3 EL |
430 | kstats.tp_packets, kstats.tp_drops); |
431 | SCPerfCounterAddUI64(ptv->capture_kernel_packets, ptv->tv->sc_perf_pca, kstats.tp_packets); | |
432 | SCPerfCounterAddUI64(ptv->capture_kernel_drops, ptv->tv->sc_perf_pca, kstats.tp_drops); | |
433 | } | |
434 | #endif | |
435 | } | |
436 | } | |
c45d8985 EL |
437 | |
438 | /** | |
439 | * \brief AF packet read function. | |
440 | * | |
441 | * This function fills | |
442 | * From here the packets are picked up by the DecodeAFP thread. | |
443 | * | |
444 | * \param user pointer to AFPThreadVars | |
445 | * \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success | |
446 | */ | |
62e63e3f | 447 | int AFPRead(AFPThreadVars *ptv) |
c45d8985 EL |
448 | { |
449 | Packet *p = NULL; | |
450 | /* XXX should try to use read that get directly to packet */ | |
c45d8985 EL |
451 | int offset = 0; |
452 | int caplen; | |
453 | struct sockaddr_ll from; | |
454 | struct iovec iov; | |
455 | struct msghdr msg; | |
c45d8985 EL |
456 | struct cmsghdr *cmsg; |
457 | union { | |
458 | struct cmsghdr cmsg; | |
459 | char buf[CMSG_SPACE(sizeof(struct tpacket_auxdata))]; | |
460 | } cmsg_buf; | |
6efd37a3 | 461 | unsigned char aux_checksum = 0; |
c45d8985 EL |
462 | |
463 | msg.msg_name = &from; | |
464 | msg.msg_namelen = sizeof(from); | |
465 | msg.msg_iov = &iov; | |
466 | msg.msg_iovlen = 1; | |
c45d8985 EL |
467 | msg.msg_control = &cmsg_buf; |
468 | msg.msg_controllen = sizeof(cmsg_buf); | |
c45d8985 EL |
469 | msg.msg_flags = 0; |
470 | ||
471 | if (ptv->cooked) | |
472 | offset = SLL_HEADER_LEN; | |
473 | else | |
474 | offset = 0; | |
e80b30c0 EL |
475 | iov.iov_len = ptv->datalen - offset; |
476 | iov.iov_base = ptv->data + offset; | |
c45d8985 EL |
477 | |
478 | caplen = recvmsg(ptv->socket, &msg, MSG_TRUNC); | |
479 | ||
480 | if (caplen < 0) { | |
481 | SCLogWarning(SC_ERR_AFP_READ, "recvmsg failed with error code %" PRId32, | |
482 | errno); | |
62e63e3f | 483 | SCReturnInt(AFP_READ_FAILURE); |
c45d8985 | 484 | } |
ff6365dd EL |
485 | |
486 | p = PacketGetFromQueueOrAlloc(); | |
c45d8985 | 487 | if (p == NULL) { |
62e63e3f | 488 | SCReturnInt(AFP_FAILURE); |
c45d8985 EL |
489 | } |
490 | ||
491 | /* get timestamp of packet via ioctl */ | |
492 | if (ioctl(ptv->socket, SIOCGSTAMP, &p->ts) == -1) { | |
493 | SCLogWarning(SC_ERR_AFP_READ, "recvmsg failed with error code %" PRId32, | |
494 | errno); | |
495 | TmqhOutputPacketpool(ptv->tv, p); | |
62e63e3f | 496 | SCReturnInt(AFP_READ_FAILURE); |
c45d8985 EL |
497 | } |
498 | ||
499 | ptv->pkts++; | |
500 | ptv->bytes += caplen + offset; | |
0227a87f | 501 | (void) SC_ATOMIC_ADD(ptv->livedev->pkts, 1); |
51eb9605 | 502 | p->livedev = ptv->livedev; |
c45d8985 EL |
503 | |
504 | /* add forged header */ | |
505 | if (ptv->cooked) { | |
e80b30c0 | 506 | SllHdr * hdrp = (SllHdr *)ptv->data; |
c45d8985 EL |
507 | /* XXX this is minimalist, but this seems enough */ |
508 | hdrp->sll_protocol = from.sll_protocol; | |
509 | } | |
510 | ||
511 | p->datalink = ptv->datalink; | |
512 | SET_PKT_LEN(p, caplen + offset); | |
e80b30c0 | 513 | if (PacketCopyData(p, ptv->data, GET_PKT_LEN(p)) == -1) { |
c45d8985 | 514 | TmqhOutputPacketpool(ptv->tv, p); |
62e63e3f | 515 | SCReturnInt(AFP_FAILURE); |
c45d8985 | 516 | } |
e80b30c0 EL |
517 | SCLogDebug("pktlen: %" PRIu32 " (pkt %p, pkt data %p)", |
518 | GET_PKT_LEN(p), p, GET_PKT_DATA(p)); | |
519 | ||
6062e00c EL |
520 | /* We only check for checksum disable */ |
521 | if (ptv->checksum_mode == CHECKSUM_VALIDATION_DISABLE) { | |
51eb9605 EL |
522 | p->flags |= PKT_IGNORE_CHECKSUM; |
523 | } else if (ptv->checksum_mode == CHECKSUM_VALIDATION_AUTO) { | |
524 | if (ptv->livedev->ignore_checksum) { | |
525 | p->flags |= PKT_IGNORE_CHECKSUM; | |
a565148f | 526 | } else if (ChecksumAutoModeCheck(ptv->pkts, |
51eb9605 EL |
527 | SC_ATOMIC_GET(ptv->livedev->pkts), |
528 | SC_ATOMIC_GET(ptv->livedev->invalid_checksums))) { | |
529 | ptv->livedev->ignore_checksum = 1; | |
6062e00c | 530 | p->flags |= PKT_IGNORE_CHECKSUM; |
51eb9605 | 531 | } |
6062e00c | 532 | } else { |
6efd37a3 EL |
533 | aux_checksum = 1; |
534 | } | |
6062e00c | 535 | |
6efd37a3 EL |
536 | /* List is NULL if we don't have activated auxiliary data */ |
537 | for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { | |
538 | struct tpacket_auxdata *aux; | |
f6ddaf33 | 539 | |
6efd37a3 EL |
540 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct tpacket_auxdata)) || |
541 | cmsg->cmsg_level != SOL_PACKET || | |
542 | cmsg->cmsg_type != PACKET_AUXDATA) | |
543 | continue; | |
f6ddaf33 | 544 | |
6efd37a3 EL |
545 | aux = (struct tpacket_auxdata *)CMSG_DATA(cmsg); |
546 | ||
547 | if (aux_checksum && (aux->tp_status & TP_STATUS_CSUMNOTREADY)) { | |
548 | p->flags |= PKT_IGNORE_CHECKSUM; | |
f6ddaf33 | 549 | } |
6efd37a3 | 550 | break; |
f6ddaf33 EL |
551 | } |
552 | ||
c469824b EL |
553 | if (TmThreadsSlotProcessPkt(ptv->tv, ptv->slot, p) != TM_ECODE_OK) { |
554 | TmqhOutputPacketpool(ptv->tv, p); | |
62e63e3f | 555 | SCReturnInt(AFP_FAILURE); |
c469824b | 556 | } |
62e63e3f | 557 | SCReturnInt(AFP_READ_OK); |
c45d8985 EL |
558 | } |
559 | ||
662dccd8 EL |
560 | TmEcode AFPWritePacket(Packet *p) |
561 | { | |
562 | struct sockaddr_ll socket_address; | |
563 | int socket; | |
564 | ||
565 | if (p->afp_v.copy_mode == AFP_COPY_MODE_IPS) { | |
566 | if (p->action & ACTION_DROP) { | |
567 | return TM_ECODE_OK; | |
568 | } | |
569 | } | |
570 | ||
571 | if (SC_ATOMIC_GET(p->afp_v.peer->state) == AFP_STATE_DOWN) | |
572 | return TM_ECODE_OK; | |
573 | ||
574 | if (p->ethh == NULL) { | |
575 | SCLogWarning(SC_ERR_INVALID_VALUE, "Should have an Ethernet header"); | |
576 | return TM_ECODE_FAILED; | |
577 | } | |
578 | /* Index of the network device */ | |
579 | socket_address.sll_ifindex = SC_ATOMIC_GET(p->afp_v.peer->if_idx); | |
580 | /* Address length*/ | |
581 | socket_address.sll_halen = ETH_ALEN; | |
582 | /* Destination MAC */ | |
583 | memcpy(socket_address.sll_addr, p->ethh, 6); | |
584 | ||
585 | /* Send packet, locking the socket if necessary */ | |
586 | if (p->afp_v.peer->flags & AFP_SOCK_PROTECT) | |
587 | SCMutexLock(&p->afp_v.peer->sock_protect); | |
588 | socket = SC_ATOMIC_GET(p->afp_v.peer->socket); | |
589 | if (sendto(socket, GET_PKT_DATA(p), GET_PKT_LEN(p), 0, | |
590 | (struct sockaddr*) &socket_address, | |
591 | sizeof(struct sockaddr_ll)) < 0) { | |
592 | SCLogWarning(SC_ERR_SOCKET, "Sending packet failed on socket %d: %s", | |
593 | socket, | |
594 | strerror(errno)); | |
595 | if (p->afp_v.peer->flags & AFP_SOCK_PROTECT) | |
596 | SCMutexUnlock(&p->afp_v.peer->sock_protect); | |
597 | return TM_ECODE_FAILED; | |
598 | } | |
599 | if (p->afp_v.peer->flags & AFP_SOCK_PROTECT) | |
600 | SCMutexUnlock(&p->afp_v.peer->sock_protect); | |
601 | ||
602 | return TM_ECODE_OK; | |
603 | } | |
604 | ||
2011a3f8 EL |
605 | TmEcode AFPReleaseDataFromRing(ThreadVars *t, Packet *p) |
606 | { | |
662dccd8 EL |
607 | int ret = TM_ECODE_OK; |
608 | /* Need to be in copy mode and need to detect early release | |
609 | where Ethernet header could not be set (and pseudo packet) */ | |
610 | if ((p->afp_v.copy_mode != AFP_COPY_MODE_NONE) && !PKT_IS_PSEUDOPKT(p)) { | |
611 | ret = AFPWritePacket(p); | |
612 | } | |
13f13b6d EL |
613 | |
614 | if (AFPDerefSocket(p->afp_v.mpeer) == 0) | |
615 | return ret; | |
616 | ||
2011a3f8 EL |
617 | if (p->afp_v.relptr) { |
618 | union thdr h; | |
619 | h.raw = p->afp_v.relptr; | |
620 | h.h2->tp_status = TP_STATUS_KERNEL; | |
662dccd8 | 621 | return ret; |
2011a3f8 EL |
622 | } |
623 | return TM_ECODE_FAILED; | |
624 | } | |
625 | ||
49b7b00f EL |
626 | /** |
627 | * \brief AF packet read function for ring | |
628 | * | |
629 | * This function fills | |
630 | * From here the packets are picked up by the DecodeAFP thread. | |
631 | * | |
632 | * \param user pointer to AFPThreadVars | |
633 | * \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success | |
634 | */ | |
635 | int AFPReadFromRing(AFPThreadVars *ptv) | |
636 | { | |
637 | Packet *p = NULL; | |
638 | union thdr h; | |
662dccd8 | 639 | struct sockaddr_ll *from; |
27b5136b | 640 | uint8_t emergency_flush = 0; |
49b7b00f | 641 | |
a369f8c3 EL |
642 | /* Loop till we have packets available */ |
643 | while (1) { | |
644 | /* Read packet from ring */ | |
645 | h.raw = (((union thdr **)ptv->frame_buf)[ptv->frame_offset]); | |
646 | if (h.raw == NULL) { | |
34b3f194 EL |
647 | SCReturnInt(AFP_FAILURE); |
648 | } | |
662dccd8 | 649 | |
a369f8c3 | 650 | if (h.h2->tp_status == TP_STATUS_KERNEL) { |
27b5136b EL |
651 | if ((emergency_flush) && (ptv->flags & AFP_EMERGENCY_MODE)) { |
652 | SCReturnInt(AFP_KERNEL_DROP); | |
653 | } else { | |
654 | SCReturnInt(AFP_READ_OK); | |
655 | } | |
656 | } | |
657 | if ((ptv->flags & AFP_EMERGENCY_MODE) && (emergency_flush == 1)) { | |
658 | h.h2->tp_status = TP_STATUS_KERNEL; | |
659 | goto next_frame; | |
a369f8c3 EL |
660 | } |
661 | ||
662 | p = PacketGetFromQueueOrAlloc(); | |
663 | if (p == NULL) { | |
34b3f194 EL |
664 | SCReturnInt(AFP_FAILURE); |
665 | } | |
49b7b00f | 666 | |
0f2b3406 EL |
667 | p->afp_v.relptr = h.raw; |
668 | p->ReleaseData = AFPReleaseDataFromRing; | |
13f13b6d EL |
669 | p->afp_v.mpeer = ptv->mpeer; |
670 | AFPRefSocket(ptv->mpeer); | |
662dccd8 | 671 | |
0f2b3406 EL |
672 | p->afp_v.copy_mode = ptv->copy_mode; |
673 | if (p->afp_v.copy_mode != AFP_COPY_MODE_NONE) { | |
674 | p->afp_v.peer = ptv->mpeer->peer; | |
675 | } else { | |
676 | p->afp_v.peer = NULL; | |
662dccd8 EL |
677 | } |
678 | ||
679 | from = (void *)h.raw + TPACKET_ALIGN(ptv->tp_hdrlen); | |
680 | ||
a369f8c3 EL |
681 | ptv->pkts++; |
682 | ptv->bytes += h.h2->tp_len; | |
683 | (void) SC_ATOMIC_ADD(ptv->livedev->pkts, 1); | |
684 | p->livedev = ptv->livedev; | |
685 | ||
686 | /* add forged header */ | |
687 | if (ptv->cooked) { | |
688 | SllHdr * hdrp = (SllHdr *)ptv->data; | |
a369f8c3 EL |
689 | /* XXX this is minimalist, but this seems enough */ |
690 | hdrp->sll_protocol = from->sll_protocol; | |
49b7b00f | 691 | } |
a369f8c3 EL |
692 | |
693 | p->datalink = ptv->datalink; | |
694 | if (h.h2->tp_len > h.h2->tp_snaplen) { | |
695 | SCLogDebug("Packet length (%d) > snaplen (%d), truncating", | |
696 | h.h2->tp_len, h.h2->tp_snaplen); | |
697 | } | |
698 | if (ptv->flags & AFP_ZERO_COPY) { | |
699 | if (PacketSetData(p, (unsigned char*)h.raw + h.h2->tp_mac, h.h2->tp_snaplen) == -1) { | |
700 | TmqhOutputPacketpool(ptv->tv, p); | |
701 | SCReturnInt(AFP_FAILURE); | |
662dccd8 | 702 | } else { |
0f2b3406 EL |
703 | p->afp_v.relptr = h.raw; |
704 | ||
705 | p->afp_v.copy_mode = ptv->copy_mode; | |
706 | if (p->afp_v.copy_mode != AFP_COPY_MODE_NONE) { | |
707 | p->afp_v.peer = ptv->mpeer->peer; | |
708 | } else { | |
709 | p->afp_v.peer = NULL; | |
662dccd8 | 710 | } |
0f2b3406 | 711 | p->ReleaseData = AFPReleaseDataFromRing; |
a369f8c3 EL |
712 | } |
713 | } else { | |
714 | if (PacketCopyData(p, (unsigned char*)h.raw + h.h2->tp_mac, h.h2->tp_snaplen) == -1) { | |
715 | TmqhOutputPacketpool(ptv->tv, p); | |
716 | SCReturnInt(AFP_FAILURE); | |
717 | } | |
718 | } | |
719 | /* Timestamp */ | |
720 | p->ts.tv_sec = h.h2->tp_sec; | |
721 | p->ts.tv_usec = h.h2->tp_nsec/1000; | |
722 | SCLogDebug("pktlen: %" PRIu32 " (pkt %p, pkt data %p)", | |
723 | GET_PKT_LEN(p), p, GET_PKT_DATA(p)); | |
724 | ||
725 | /* We only check for checksum disable */ | |
726 | if (ptv->checksum_mode == CHECKSUM_VALIDATION_DISABLE) { | |
727 | p->flags |= PKT_IGNORE_CHECKSUM; | |
728 | } else if (ptv->checksum_mode == CHECKSUM_VALIDATION_AUTO) { | |
729 | if (ptv->livedev->ignore_checksum) { | |
730 | p->flags |= PKT_IGNORE_CHECKSUM; | |
731 | } else if (ChecksumAutoModeCheck(ptv->pkts, | |
732 | SC_ATOMIC_GET(ptv->livedev->pkts), | |
733 | SC_ATOMIC_GET(ptv->livedev->invalid_checksums))) { | |
734 | ptv->livedev->ignore_checksum = 1; | |
735 | p->flags |= PKT_IGNORE_CHECKSUM; | |
736 | } | |
737 | } else { | |
738 | if (h.h2->tp_status & TP_STATUS_CSUMNOTREADY) { | |
49b7b00f | 739 | p->flags |= PKT_IGNORE_CHECKSUM; |
a369f8c3 | 740 | } |
27b5136b EL |
741 | if (h.h2->tp_status & TP_STATUS_LOSING) { |
742 | emergency_flush = 1; | |
743 | } | |
a369f8c3 EL |
744 | } |
745 | ||
746 | if (TmThreadsSlotProcessPkt(ptv->tv, ptv->slot, p) != TM_ECODE_OK) { | |
747 | h.h2->tp_status = TP_STATUS_KERNEL; | |
748 | if (++ptv->frame_offset >= ptv->req.tp_frame_nr) { | |
749 | ptv->frame_offset = 0; | |
750 | } | |
751 | TmqhOutputPacketpool(ptv->tv, p); | |
752 | SCReturnInt(AFP_FAILURE); | |
49b7b00f | 753 | } |
49b7b00f | 754 | |
27b5136b EL |
755 | /* release frame if not in zero copy mode */ |
756 | if (!(ptv->flags & AFP_ZERO_COPY)) { | |
757 | h.h2->tp_status = TP_STATUS_KERNEL; | |
758 | } | |
759 | next_frame: | |
34b3f194 EL |
760 | if (++ptv->frame_offset >= ptv->req.tp_frame_nr) { |
761 | ptv->frame_offset = 0; | |
762 | } | |
34b3f194 EL |
763 | } |
764 | ||
49b7b00f EL |
765 | SCReturnInt(AFP_READ_OK); |
766 | } | |
767 | ||
13f13b6d EL |
768 | /** |
769 | * \brief Reference socket | |
770 | * | |
771 | * \retval O in case of failure, 1 in case of success | |
772 | */ | |
773 | static int AFPRefSocket(AFPPeer* peer) | |
774 | { | |
775 | if (unlikely(peer == NULL)) | |
776 | return 0; | |
777 | ||
778 | (void)SC_ATOMIC_ADD(peer->sock_usage, 1); | |
779 | return 1; | |
780 | } | |
781 | ||
782 | ||
783 | /** | |
784 | * \brief Dereference socket | |
785 | * | |
786 | * \retval 1 if socket is still alive, 0 if not | |
787 | */ | |
788 | static int AFPDerefSocket(AFPPeer* peer) | |
789 | { | |
790 | if (SC_ATOMIC_SUB(peer->sock_usage, 1) == 0) { | |
791 | if (SC_ATOMIC_GET(peer->state) == AFP_STATE_DOWN) { | |
792 | SCLogInfo("Cleaning socket connected to '%s'", peer->iface); | |
793 | close(SC_ATOMIC_GET(peer->socket)); | |
794 | return 0; | |
795 | } | |
796 | } | |
797 | return 1; | |
798 | } | |
799 | ||
800 | void AFPSwitchState(AFPThreadVars *ptv, int state) | |
801 | { | |
802 | ptv->afp_state = state; | |
803 | ptv->down_count = 0; | |
49b7b00f | 804 | |
13f13b6d EL |
805 | AFPPeerUpdate(ptv); |
806 | ||
807 | /* Do cleaning if switching to down state */ | |
808 | if (state == AFP_STATE_DOWN) { | |
809 | if (ptv->frame_buf) { | |
810 | /* only used in reading phase, we can free it */ | |
811 | SCFree(ptv->frame_buf); | |
812 | ptv->frame_buf = NULL; | |
813 | } | |
814 | if (ptv->socket != -1) { | |
815 | /* we need to wait for all packets to return data */ | |
816 | if (SC_ATOMIC_SUB(ptv->mpeer->sock_usage, 1) == 0) { | |
817 | SCLogInfo("Cleaning socket connected to '%s'", ptv->iface); | |
818 | close(ptv->socket); | |
819 | ptv->socket = -1; | |
820 | } | |
821 | } | |
822 | } | |
823 | if (state == AFP_STATE_UP) { | |
824 | (void)SC_ATOMIC_SET(ptv->mpeer->sock_usage, 1); | |
825 | } | |
826 | } | |
49b7b00f | 827 | |
13f13b6d EL |
828 | /** |
829 | * \brief Try to reopen socket | |
830 | * | |
831 | * \retval 0 in case of success, negative if error occurs or a condition | |
832 | * is not met. | |
833 | */ | |
c45d8985 EL |
834 | static int AFPTryReopen(AFPThreadVars *ptv) |
835 | { | |
836 | int afp_activate_r; | |
837 | ||
13f13b6d EL |
838 | ptv->down_count++; |
839 | ||
840 | ||
841 | /* Don't reconnect till we have packet that did not release data */ | |
842 | if (SC_ATOMIC_GET(ptv->mpeer->sock_usage) != 0) { | |
843 | return -1; | |
844 | } | |
c45d8985 | 845 | |
e80b30c0 | 846 | afp_activate_r = AFPCreateSocket(ptv, ptv->iface, 0); |
c45d8985 | 847 | if (afp_activate_r != 0) { |
13f13b6d EL |
848 | if (ptv->down_count % AFP_DOWN_COUNTER_INTERVAL == 0) { |
849 | SCLogWarning(SC_ERR_AFP_CREATE, "Can not open iface '%s'", | |
850 | ptv->iface); | |
851 | } | |
c45d8985 EL |
852 | return afp_activate_r; |
853 | } | |
854 | ||
855 | SCLogInfo("Recovering interface listening"); | |
c45d8985 EL |
856 | return 0; |
857 | } | |
858 | ||
e80b30c0 EL |
859 | /** |
860 | * \brief Main AF_PACKET reading Loop function | |
861 | */ | |
862 | TmEcode ReceiveAFPLoop(ThreadVars *tv, void *data, void *slot) | |
863 | { | |
34581ce9 AS |
864 | SCEnter(); |
865 | ||
e80b30c0 EL |
866 | uint16_t packet_q_len = 0; |
867 | AFPThreadVars *ptv = (AFPThreadVars *)data; | |
e80b30c0 EL |
868 | struct pollfd fds; |
869 | int r; | |
34581ce9 | 870 | TmSlot *s = (TmSlot *)slot; |
e80b30c0 | 871 | |
34581ce9 | 872 | ptv->slot = s->slot_next; |
e80b30c0 EL |
873 | |
874 | fds.fd = ptv->socket; | |
875 | fds.events = POLLIN; | |
876 | ||
877 | while (1) { | |
878 | /* Start by checking the state of our interface */ | |
879 | if (unlikely(ptv->afp_state == AFP_STATE_DOWN)) { | |
880 | int dbreak = 0; | |
662dccd8 | 881 | |
e80b30c0 EL |
882 | do { |
883 | usleep(AFP_RECONNECT_TIMEOUT); | |
884 | if (suricata_ctl_flags != 0) { | |
885 | dbreak = 1; | |
886 | break; | |
887 | } | |
888 | r = AFPTryReopen(ptv); | |
09e709d1 | 889 | fds.fd = ptv->socket; |
e80b30c0 EL |
890 | } while (r < 0); |
891 | if (dbreak == 1) | |
892 | break; | |
893 | } | |
894 | ||
895 | /* make sure we have at least one packet in the packet pool, to prevent | |
896 | * us from alloc'ing packets at line rate */ | |
897 | do { | |
898 | packet_q_len = PacketPoolSize(); | |
899 | if (unlikely(packet_q_len == 0)) { | |
900 | PacketPoolWait(); | |
901 | } | |
902 | } while (packet_q_len == 0); | |
903 | ||
904 | r = poll(&fds, 1, POLL_TIMEOUT); | |
905 | ||
906 | if (suricata_ctl_flags != 0) { | |
907 | break; | |
908 | } | |
909 | ||
910 | if (r > 0 && | |
911 | (fds.revents & (POLLHUP|POLLRDHUP|POLLERR|POLLNVAL))) { | |
912 | if (fds.revents & (POLLHUP | POLLRDHUP)) { | |
13f13b6d | 913 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 | 914 | continue; |
ff6365dd | 915 | } else if (fds.revents & POLLERR) { |
e80b30c0 EL |
916 | char c; |
917 | /* Do a recv to get errno */ | |
918 | if (recv(ptv->socket, &c, sizeof c, MSG_PEEK) != -1) | |
919 | continue; /* what, no error? */ | |
920 | SCLogError(SC_ERR_AFP_READ, "Error reading data from socket: (%d" PRIu32 ") %s", | |
921 | errno, strerror(errno)); | |
13f13b6d | 922 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 | 923 | continue; |
ff6365dd | 924 | } else if (fds.revents & POLLNVAL) { |
e80b30c0 | 925 | SCLogError(SC_ERR_AFP_READ, "Invalid polling request"); |
13f13b6d | 926 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 EL |
927 | continue; |
928 | } | |
929 | } else if (r > 0) { | |
49b7b00f EL |
930 | if (ptv->flags & AFP_RING_MODE) { |
931 | r = AFPReadFromRing(ptv); | |
932 | } else { | |
933 | /* AFPRead will call TmThreadsSlotProcessPkt on read packets */ | |
934 | r = AFPRead(ptv); | |
935 | } | |
62e63e3f EL |
936 | switch (r) { |
937 | case AFP_READ_FAILURE: | |
938 | /* AFPRead in error: best to reset the socket */ | |
939 | SCLogError(SC_ERR_AFP_READ, "AFPRead error reading data from socket: (%d" PRIu32 ") %s", | |
940 | errno, strerror(errno)); | |
13f13b6d | 941 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
62e63e3f EL |
942 | continue; |
943 | case AFP_FAILURE: | |
13f13b6d | 944 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
62e63e3f EL |
945 | SCReturnInt(TM_ECODE_FAILED); |
946 | break; | |
947 | case AFP_READ_OK: | |
6efd37a3 | 948 | AFPDumpCounters(ptv, 0); |
62e63e3f | 949 | break; |
27b5136b EL |
950 | case AFP_KERNEL_DROP: |
951 | AFPDumpCounters(ptv, 1); | |
952 | break; | |
e80b30c0 EL |
953 | } |
954 | } else if ((r < 0) && (errno != EINTR)) { | |
955 | SCLogError(SC_ERR_AFP_READ, "Error reading data from socket: (%d" PRIu32 ") %s", | |
956 | errno, strerror(errno)); | |
13f13b6d | 957 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 EL |
958 | continue; |
959 | } | |
d68f182e | 960 | SCPerfSyncCountersIfSignalled(tv, 0); |
e80b30c0 EL |
961 | } |
962 | ||
e80b30c0 EL |
963 | SCReturnInt(TM_ECODE_OK); |
964 | } | |
965 | ||
13f13b6d EL |
966 | static int AFPGetDevFlags(int fd, const char *ifname) |
967 | { | |
968 | struct ifreq ifr; | |
969 | ||
970 | memset(&ifr, 0, sizeof(ifr)); | |
971 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); | |
972 | ||
973 | if (ioctl(fd, SIOCGIFFLAGS, &ifr) == -1) { | |
974 | SCLogError(SC_ERR_AFP_CREATE, "Unable to find type for iface \"%s\": %s", | |
975 | ifname, strerror(errno)); | |
976 | return -1; | |
977 | } | |
978 | ||
979 | return ifr.ifr_flags; | |
980 | } | |
981 | ||
982 | ||
e80b30c0 | 983 | static int AFPGetIfnumByDev(int fd, const char *ifname, int verbose) |
c45d8985 EL |
984 | { |
985 | struct ifreq ifr; | |
986 | ||
987 | memset(&ifr, 0, sizeof(ifr)); | |
e80b30c0 | 988 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
c45d8985 EL |
989 | |
990 | if (ioctl(fd, SIOCGIFINDEX, &ifr) == -1) { | |
991 | if (verbose) | |
992 | SCLogError(SC_ERR_AFP_CREATE, "Unable to find iface %s: %s", | |
993 | ifname, strerror(errno)); | |
994 | return -1; | |
995 | } | |
996 | ||
997 | return ifr.ifr_ifindex; | |
998 | } | |
999 | ||
e80b30c0 | 1000 | static int AFPGetDevLinktype(int fd, const char *ifname) |
c45d8985 EL |
1001 | { |
1002 | struct ifreq ifr; | |
1003 | ||
1004 | memset(&ifr, 0, sizeof(ifr)); | |
e80b30c0 | 1005 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
c45d8985 EL |
1006 | |
1007 | if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1) { | |
1008 | SCLogError(SC_ERR_AFP_CREATE, "Unable to find type for iface \"%s\": %s", | |
1009 | ifname, strerror(errno)); | |
1010 | return -1; | |
1011 | } | |
1012 | ||
e80b30c0 EL |
1013 | switch (ifr.ifr_hwaddr.sa_family) { |
1014 | case ARPHRD_LOOPBACK: | |
1015 | return LINKTYPE_ETHERNET; | |
1016 | case ARPHRD_PPP: | |
1017 | return LINKTYPE_RAW; | |
1018 | default: | |
1019 | return ifr.ifr_hwaddr.sa_family; | |
1020 | } | |
c45d8985 EL |
1021 | } |
1022 | ||
49b7b00f EL |
1023 | static int AFPComputeRingParams(AFPThreadVars *ptv, int order) |
1024 | { | |
1025 | /* Compute structure: | |
1026 | Target is to store all pending packets | |
1027 | with a size equal to MTU + auxdata | |
1028 | And we keep a decent number of block | |
1029 | ||
1030 | To do so: | |
1031 | Compute frame_size (aligned to be able to fit in block | |
1032 | Check which block size we need. Blocksize is a 2^n * pagesize | |
1033 | We then need to get order, big enough to have | |
1034 | frame_size < block size | |
1035 | Find number of frame per block (divide) | |
1036 | Fill in packet_req | |
1037 | ||
1038 | Compute frame size: | |
1039 | described in packet_mmap.txt | |
1040 | dependant on snaplen (need to use a variable ?) | |
1041 | snaplen: MTU ? | |
1042 | tp_hdrlen determine_version in daq_afpacket | |
1043 | in V1: sizeof(struct tpacket_hdr); | |
1044 | in V2: val in getsockopt(instance->fd, SOL_PACKET, PACKET_HDRLEN, &val, &len) | |
1045 | frame size: TPACKET_ALIGN(snaplen + TPACKET_ALIGN(TPACKET_ALIGN(tp_hdrlen) + sizeof(struct sockaddr_ll) + ETH_HLEN) - ETH_HLEN); | |
1046 | ||
1047 | */ | |
1048 | int tp_hdrlen = sizeof(struct tpacket_hdr); | |
1049 | int snaplen = default_packet_size; | |
1050 | ||
1051 | ptv->req.tp_frame_size = TPACKET_ALIGN(snaplen +TPACKET_ALIGN(TPACKET_ALIGN(tp_hdrlen) + sizeof(struct sockaddr_ll) + ETH_HLEN) - ETH_HLEN); | |
1052 | ptv->req.tp_block_size = getpagesize() << order; | |
1053 | int frames_per_block = ptv->req.tp_block_size / ptv->req.tp_frame_size; | |
1054 | if (frames_per_block == 0) { | |
1055 | SCLogInfo("frame size to big"); | |
1056 | return -1; | |
1057 | } | |
8879df80 | 1058 | ptv->req.tp_frame_nr = ptv->ring_size; |
d8d9b098 | 1059 | ptv->req.tp_block_nr = ptv->req.tp_frame_nr / frames_per_block + 1; |
49b7b00f EL |
1060 | /* exact division */ |
1061 | ptv->req.tp_frame_nr = ptv->req.tp_block_nr * frames_per_block; | |
1062 | SCLogInfo("AF_PACKET RX Ring params: block_size=%d block_nr=%d frame_size=%d frame_nr=%d", | |
1063 | ptv->req.tp_block_size, ptv->req.tp_block_nr, | |
1064 | ptv->req.tp_frame_size, ptv->req.tp_frame_nr); | |
1065 | return 1; | |
1066 | } | |
1067 | ||
e80b30c0 | 1068 | static int AFPCreateSocket(AFPThreadVars *ptv, char *devname, int verbose) |
c45d8985 EL |
1069 | { |
1070 | int r; | |
1071 | struct packet_mreq sock_params; | |
1072 | struct sockaddr_ll bind_address; | |
49b7b00f EL |
1073 | int order; |
1074 | unsigned int i; | |
662dccd8 | 1075 | int if_idx; |
49b7b00f | 1076 | |
c45d8985 EL |
1077 | /* open socket */ |
1078 | ptv->socket = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); | |
1079 | if (ptv->socket == -1) { | |
e80b30c0 | 1080 | SCLogError(SC_ERR_AFP_CREATE, "Couldn't create a AF_PACKET socket, error %s", strerror(errno)); |
13f13b6d | 1081 | goto error; |
c45d8985 | 1082 | } |
662dccd8 | 1083 | if_idx = AFPGetIfnumByDev(ptv->socket, devname, verbose); |
c45d8985 EL |
1084 | /* bind socket */ |
1085 | memset(&bind_address, 0, sizeof(bind_address)); | |
1086 | bind_address.sll_family = AF_PACKET; | |
1087 | bind_address.sll_protocol = htons(ETH_P_ALL); | |
662dccd8 | 1088 | bind_address.sll_ifindex = if_idx; |
c45d8985 EL |
1089 | if (bind_address.sll_ifindex == -1) { |
1090 | if (verbose) | |
e80b30c0 | 1091 | SCLogError(SC_ERR_AFP_CREATE, "Couldn't find iface %s", devname); |
13f13b6d EL |
1092 | goto socket_err; |
1093 | } | |
1094 | ||
1095 | ||
1096 | ||
1097 | if (ptv->promisc != 0) { | |
1098 | /* Force promiscuous mode */ | |
1099 | memset(&sock_params, 0, sizeof(sock_params)); | |
1100 | sock_params.mr_type = PACKET_MR_PROMISC; | |
1101 | sock_params.mr_ifindex = bind_address.sll_ifindex; | |
1102 | r = setsockopt(ptv->socket, SOL_PACKET, PACKET_ADD_MEMBERSHIP,(void *)&sock_params, sizeof(sock_params)); | |
1103 | if (r < 0) { | |
1104 | SCLogError(SC_ERR_AFP_CREATE, | |
1105 | "Couldn't switch iface %s to promiscuous, error %s", | |
1106 | devname, strerror(errno)); | |
1107 | goto frame_err; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | if (ptv->checksum_mode == CHECKSUM_VALIDATION_KERNEL) { | |
1112 | int val = 1; | |
1113 | if (setsockopt(ptv->socket, SOL_PACKET, PACKET_AUXDATA, &val, | |
1114 | sizeof(val)) == -1 && errno != ENOPROTOOPT) { | |
1115 | SCLogWarning(SC_ERR_NO_AF_PACKET, | |
1116 | "'kernel' checksum mode not supported, failling back to full mode."); | |
1117 | ptv->checksum_mode = CHECKSUM_VALIDATION_ENABLE; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | /* set socket recv buffer size */ | |
1122 | if (ptv->buffer_size != 0) { | |
1123 | /* | |
1124 | * Set the socket buffer size to the specified value. | |
1125 | */ | |
1126 | SCLogInfo("Setting AF_PACKET socket buffer to %d", ptv->buffer_size); | |
1127 | if (setsockopt(ptv->socket, SOL_SOCKET, SO_RCVBUF, | |
1128 | &ptv->buffer_size, | |
1129 | sizeof(ptv->buffer_size)) == -1) { | |
1130 | SCLogError(SC_ERR_AFP_CREATE, | |
1131 | "Couldn't set buffer size to %d on iface %s, error %s", | |
1132 | ptv->buffer_size, devname, strerror(errno)); | |
1133 | goto frame_err; | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | r = bind(ptv->socket, (struct sockaddr *)&bind_address, sizeof(bind_address)); | |
1138 | if (r < 0) { | |
1139 | if (verbose) { | |
1140 | if (errno == ENETDOWN) { | |
1141 | SCLogError(SC_ERR_AFP_CREATE, | |
1142 | "Couldn't bind AF_PACKET socket, iface %s is down", | |
1143 | devname); | |
1144 | } else { | |
1145 | SCLogError(SC_ERR_AFP_CREATE, | |
1146 | "Couldn't bind AF_PACKET socket to iface %s, error %s", | |
1147 | devname, strerror(errno)); | |
1148 | } | |
1149 | } | |
1150 | goto frame_err; | |
1151 | } | |
1152 | ||
1153 | int if_flags = AFPGetDevFlags(ptv->socket, ptv->iface); | |
1154 | if (if_flags == -1) { | |
1155 | if (verbose) { | |
1156 | SCLogError(SC_ERR_AFP_READ, | |
1157 | "Can not acces to interface '%s'", | |
1158 | ptv->iface); | |
1159 | } | |
1160 | goto frame_err; | |
1161 | } | |
1162 | if ((if_flags & IFF_UP) == 0) { | |
1163 | if (verbose) { | |
1164 | SCLogError(SC_ERR_AFP_READ, | |
1165 | "Interface '%s' is down", | |
1166 | ptv->iface); | |
1167 | } | |
1168 | goto frame_err; | |
c45d8985 | 1169 | } |
49b7b00f EL |
1170 | |
1171 | if (ptv->flags & AFP_RING_MODE) { | |
1172 | int val = TPACKET_V2; | |
1173 | unsigned int len = sizeof(val); | |
1174 | if (getsockopt(ptv->socket, SOL_PACKET, PACKET_HDRLEN, &val, &len) < 0) { | |
1175 | if (errno == ENOPROTOOPT) { | |
1176 | SCLogError(SC_ERR_AFP_CREATE, | |
1177 | "Too old kernel giving up (need 2.6.27 at least)"); | |
1178 | } | |
1179 | SCLogError(SC_ERR_AFP_CREATE, "Error when retrieving packet header len"); | |
13f13b6d | 1180 | goto socket_err; |
49b7b00f EL |
1181 | } |
1182 | ptv->tp_hdrlen = val; | |
1183 | ||
1184 | val = TPACKET_V2; | |
1185 | if (setsockopt(ptv->socket, SOL_PACKET, PACKET_VERSION, &val, | |
1186 | sizeof(val)) < 0) { | |
1187 | SCLogError(SC_ERR_AFP_CREATE, | |
1188 | "Can't activate TPACKET_V2 on packet socket: %s", | |
1189 | strerror(errno)); | |
13f13b6d | 1190 | goto socket_err; |
49b7b00f EL |
1191 | } |
1192 | ||
1193 | /* Allocate RX ring */ | |
1194 | #define DEFAULT_ORDER 3 | |
1195 | for (order = DEFAULT_ORDER; order >= 0; order--) { | |
1196 | if (AFPComputeRingParams(ptv, order) != 1) { | |
1197 | SCLogInfo("Ring parameter are incorrect. Please correct the devel"); | |
1198 | } | |
1199 | ||
1200 | r = setsockopt(ptv->socket, SOL_PACKET, PACKET_RX_RING, (void *) &ptv->req, sizeof(ptv->req)); | |
1201 | if (r < 0) { | |
1202 | if (errno == ENOMEM) { | |
1203 | SCLogInfo("Memory issue with ring parameters. Retrying."); | |
1204 | continue; | |
1205 | } | |
1206 | SCLogError(SC_ERR_MEM_ALLOC, | |
1207 | "Unable to allocate RX Ring for iface %s: (%d) %s", | |
1208 | devname, | |
1209 | errno, | |
1210 | strerror(errno)); | |
13f13b6d | 1211 | goto socket_err; |
49b7b00f EL |
1212 | } else { |
1213 | break; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | if (order < 0) { | |
1218 | SCLogError(SC_ERR_MEM_ALLOC, | |
1219 | "Unable to allocate RX Ring for iface %s (order 0 failed)", | |
1220 | devname); | |
13f13b6d | 1221 | goto socket_err; |
49b7b00f EL |
1222 | } |
1223 | ||
1224 | /* Allocate the Ring */ | |
1225 | ptv->ring_buflen = ptv->req.tp_block_nr * ptv->req.tp_block_size; | |
1226 | ptv->ring_buf = mmap(0, ptv->ring_buflen, PROT_READ|PROT_WRITE, | |
1227 | MAP_SHARED, ptv->socket, 0); | |
1228 | if (ptv->ring_buf == MAP_FAILED) { | |
1229 | SCLogError(SC_ERR_MEM_ALLOC, "Unable to mmap"); | |
13f13b6d | 1230 | goto socket_err; |
49b7b00f EL |
1231 | } |
1232 | /* allocate a ring for each frame header pointer*/ | |
1233 | ptv->frame_buf = SCMalloc(ptv->req.tp_frame_nr * sizeof (union thdr *)); | |
1234 | if (ptv->frame_buf == NULL) { | |
1235 | SCLogError(SC_ERR_MEM_ALLOC, "Unable to allocate frame buf"); | |
13f13b6d | 1236 | goto mmap_err; |
49b7b00f EL |
1237 | } |
1238 | memset(ptv->frame_buf, 0, ptv->req.tp_frame_nr * sizeof (union thdr *)); | |
1239 | /* fill the header ring with proper frame ptr*/ | |
1240 | ptv->frame_offset = 0; | |
1241 | for (i = 0; i < ptv->req.tp_block_nr; ++i) { | |
1242 | void *base = &ptv->ring_buf[i * ptv->req.tp_block_size]; | |
1243 | unsigned int j; | |
1244 | for (j = 0; j < ptv->req.tp_block_size / ptv->req.tp_frame_size; ++j, ++ptv->frame_offset) { | |
1245 | (((union thdr **)ptv->frame_buf)[ptv->frame_offset]) = base; | |
1246 | base += ptv->req.tp_frame_size; | |
1247 | } | |
1248 | } | |
1249 | ptv->frame_offset = 0; | |
1250 | } | |
1251 | ||
13f13b6d | 1252 | SCLogInfo("Using interface '%s' via socket %d", (char *)devname, ptv->socket); |
ec76742c | 1253 | |
c45d8985 EL |
1254 | #ifdef HAVE_PACKET_FANOUT |
1255 | /* add binded socket to fanout group */ | |
fbca1a4e | 1256 | if (ptv->threads > 1) { |
c45d8985 | 1257 | uint32_t option = 0; |
e80b30c0 EL |
1258 | uint16_t mode = ptv->cluster_type; |
1259 | uint16_t id = ptv->cluster_id; | |
c45d8985 EL |
1260 | option = (mode << 16) | (id & 0xffff); |
1261 | r = setsockopt(ptv->socket, SOL_PACKET, PACKET_FANOUT,(void *)&option, sizeof(option)); | |
1262 | if (r < 0) { | |
1263 | SCLogError(SC_ERR_AFP_CREATE, | |
1264 | "Coudn't set fanout mode, error %s", | |
1265 | strerror(errno)); | |
13f13b6d | 1266 | goto frame_err; |
c45d8985 EL |
1267 | } |
1268 | } | |
1269 | #endif | |
1270 | ||
c85ee1e3 EL |
1271 | ptv->datalink = AFPGetDevLinktype(ptv->socket, ptv->iface); |
1272 | switch (ptv->datalink) { | |
1273 | case ARPHRD_PPP: | |
1274 | case ARPHRD_ATM: | |
1275 | ptv->cooked = 1; | |
1276 | } | |
1277 | ||
f2a6fb8a EL |
1278 | TmEcode rc; |
1279 | rc = AFPSetBPFFilter(ptv); | |
1280 | if (rc == TM_ECODE_FAILED) { | |
1281 | SCLogError(SC_ERR_AFP_CREATE, "Set AF_PACKET bpf filter \"%s\" failed.", ptv->bpf_filter); | |
13f13b6d | 1282 | goto frame_err; |
f2a6fb8a EL |
1283 | } |
1284 | ||
49b7b00f | 1285 | /* Init is ok */ |
13f13b6d | 1286 | AFPSwitchState(ptv, AFP_STATE_UP); |
c45d8985 | 1287 | return 0; |
13f13b6d EL |
1288 | |
1289 | frame_err: | |
1290 | if (ptv->frame_buf) | |
1291 | SCFree(ptv->frame_buf); | |
1292 | mmap_err: | |
1293 | /* Packet mmap does the cleaning when socket is closed */ | |
1294 | socket_err: | |
1295 | close(ptv->socket); | |
1296 | ptv->socket = -1; | |
1297 | error: | |
1298 | return -1; | |
c45d8985 EL |
1299 | } |
1300 | ||
f2a6fb8a EL |
1301 | TmEcode AFPSetBPFFilter(AFPThreadVars *ptv) |
1302 | { | |
1303 | struct bpf_program filter; | |
1304 | struct sock_fprog fcode; | |
1305 | int rc; | |
1306 | ||
1307 | if (!ptv->bpf_filter) | |
1308 | return TM_ECODE_OK; | |
1309 | ||
1310 | SCMutexLock(&afpacket_bpf_set_filter_lock); | |
1311 | ||
1312 | SCLogInfo("Using BPF '%s' on iface '%s'", | |
1313 | ptv->bpf_filter, | |
1314 | ptv->iface); | |
1315 | if (pcap_compile_nopcap(default_packet_size, /* snaplen_arg */ | |
1316 | ptv->datalink, /* linktype_arg */ | |
1317 | &filter, /* program */ | |
1318 | ptv->bpf_filter, /* const char *buf */ | |
1319 | 0, /* optimize */ | |
1320 | 0 /* mask */ | |
1321 | ) == -1) { | |
1322 | SCLogError(SC_ERR_AFP_CREATE, "Filter compilation failed."); | |
1323 | SCMutexUnlock(&afpacket_bpf_set_filter_lock); | |
1324 | return TM_ECODE_FAILED; | |
1325 | } | |
1326 | SCMutexUnlock(&afpacket_bpf_set_filter_lock); | |
1327 | ||
1328 | if (filter.bf_insns == NULL) { | |
1329 | SCLogError(SC_ERR_AFP_CREATE, "Filter badly setup."); | |
1330 | return TM_ECODE_FAILED; | |
1331 | } | |
1332 | ||
1333 | fcode.len = filter.bf_len; | |
1334 | fcode.filter = (struct sock_filter*)filter.bf_insns; | |
1335 | ||
1336 | rc = setsockopt(ptv->socket, SOL_SOCKET, SO_ATTACH_FILTER, &fcode, sizeof(fcode)); | |
1337 | ||
1338 | if(rc == -1) { | |
1339 | SCLogError(SC_ERR_AFP_CREATE, "Failed to attach filter: %s", strerror(errno)); | |
1340 | return TM_ECODE_FAILED; | |
1341 | } | |
1342 | ||
1343 | SCMutexUnlock(&afpacket_bpf_set_filter_lock); | |
1344 | return TM_ECODE_OK; | |
1345 | } | |
1346 | ||
c45d8985 EL |
1347 | |
1348 | /** | |
1349 | * \brief Init function for ReceiveAFP. | |
1350 | * | |
1351 | * \param tv pointer to ThreadVars | |
1352 | * \param initdata pointer to the interface passed from the user | |
1353 | * \param data pointer gets populated with AFPThreadVars | |
1354 | * | |
1355 | * \todo Create a general AFP setup function. | |
1356 | */ | |
1357 | TmEcode ReceiveAFPThreadInit(ThreadVars *tv, void *initdata, void **data) { | |
1358 | SCEnter(); | |
fbca1a4e | 1359 | AFPIfaceConfig *afpconfig = initdata; |
c45d8985 | 1360 | |
c45d8985 EL |
1361 | if (initdata == NULL) { |
1362 | SCLogError(SC_ERR_INVALID_ARGUMENT, "initdata == NULL"); | |
1363 | SCReturnInt(TM_ECODE_FAILED); | |
1364 | } | |
1365 | ||
1366 | AFPThreadVars *ptv = SCMalloc(sizeof(AFPThreadVars)); | |
45d5c3ca EL |
1367 | if (ptv == NULL) { |
1368 | afpconfig->DerefFunc(afpconfig); | |
c45d8985 | 1369 | SCReturnInt(TM_ECODE_FAILED); |
45d5c3ca | 1370 | } |
c45d8985 EL |
1371 | memset(ptv, 0, sizeof(AFPThreadVars)); |
1372 | ||
1373 | ptv->tv = tv; | |
1374 | ptv->cooked = 0; | |
1375 | ||
fbca1a4e | 1376 | strlcpy(ptv->iface, afpconfig->iface, AFP_IFACE_NAME_LENGTH); |
c45d8985 EL |
1377 | ptv->iface[AFP_IFACE_NAME_LENGTH - 1]= '\0'; |
1378 | ||
51eb9605 EL |
1379 | ptv->livedev = LiveGetDevice(ptv->iface); |
1380 | if (ptv->livedev == NULL) { | |
1381 | SCLogError(SC_ERR_INVALID_VALUE, "Unable to find Live device"); | |
11bdf483 | 1382 | SCFree(ptv); |
51eb9605 EL |
1383 | SCReturnInt(TM_ECODE_FAILED); |
1384 | } | |
1385 | ||
fbca1a4e | 1386 | ptv->buffer_size = afpconfig->buffer_size; |
8879df80 | 1387 | ptv->ring_size = afpconfig->ring_size; |
e80b30c0 | 1388 | |
df7dbe36 | 1389 | ptv->promisc = afpconfig->promisc; |
6062e00c | 1390 | ptv->checksum_mode = afpconfig->checksum_mode; |
6efd37a3 | 1391 | ptv->bpf_filter = NULL; |
df7dbe36 | 1392 | |
fbca1a4e | 1393 | ptv->threads = 1; |
e80b30c0 EL |
1394 | #ifdef HAVE_PACKET_FANOUT |
1395 | ptv->cluster_type = PACKET_FANOUT_LB; | |
1396 | ptv->cluster_id = 1; | |
1397 | /* We only set cluster info if the number of reader threads is greater than 1 */ | |
fbca1a4e EL |
1398 | if (afpconfig->threads > 1) { |
1399 | ptv->cluster_id = afpconfig->cluster_id; | |
1400 | ptv->cluster_type = afpconfig->cluster_type; | |
1401 | ptv->threads = afpconfig->threads; | |
e80b30c0 EL |
1402 | } |
1403 | #endif | |
49b7b00f | 1404 | ptv->flags = afpconfig->flags; |
e80b30c0 | 1405 | |
f2a6fb8a EL |
1406 | if (afpconfig->bpf_filter) { |
1407 | ptv->bpf_filter = afpconfig->bpf_filter; | |
1408 | } | |
1409 | ||
6efd37a3 EL |
1410 | #ifdef PACKET_STATISTICS |
1411 | ptv->capture_kernel_packets = SCPerfTVRegisterCounter("capture.kernel_packets", | |
1412 | ptv->tv, | |
1413 | SC_PERF_TYPE_UINT64, | |
1414 | "NULL"); | |
1415 | ptv->capture_kernel_drops = SCPerfTVRegisterCounter("capture.kernel_drops", | |
1416 | ptv->tv, | |
1417 | SC_PERF_TYPE_UINT64, | |
1418 | "NULL"); | |
1419 | #endif | |
1420 | ||
34b3f194 EL |
1421 | char *active_runmode = RunmodeGetActive(); |
1422 | ||
1423 | if (active_runmode && !strcmp("workers", active_runmode)) { | |
1424 | ptv->flags |= AFP_ZERO_COPY; | |
1425 | SCLogInfo("Enabling zero copy mode"); | |
662dccd8 EL |
1426 | } else { |
1427 | /* If we are using copy mode we need a lock */ | |
1428 | ptv->flags |= AFP_SOCK_PROTECT; | |
34b3f194 | 1429 | } |
2011a3f8 EL |
1430 | |
1431 | /* If we are in RING mode, then we can use ZERO copy | |
1432 | * by using the data release mechanism */ | |
1433 | if (ptv->flags & AFP_RING_MODE) { | |
1434 | ptv->flags |= AFP_ZERO_COPY; | |
1435 | SCLogInfo("Enabling zero copy mode by using data release call"); | |
1436 | } | |
34b3f194 | 1437 | |
13f13b6d | 1438 | if (AFPPeersListAdd(ptv) == TM_ECODE_FAILED) { |
c45d8985 | 1439 | SCFree(ptv); |
45d5c3ca | 1440 | afpconfig->DerefFunc(afpconfig); |
c45d8985 EL |
1441 | SCReturnInt(TM_ECODE_FAILED); |
1442 | } | |
1443 | ||
13f13b6d EL |
1444 | r = AFPCreateSocket(ptv, ptv->iface, 1); |
1445 | if (r < 0) { | |
1446 | SCLogError(SC_ERR_AFP_CREATE, "Couldn't init AF_PACKET socket"); | |
1447 | //SCFree(ptv); | |
1448 | //afpconfig->DerefFunc(afpconfig); | |
1449 | //SCReturnInt(TM_ECODE_OKFAILED); | |
1450 | } | |
1451 | ||
ec76742c | 1452 | |
662dccd8 EL |
1453 | ptv->copy_mode = afpconfig->copy_mode; |
1454 | if (ptv->copy_mode != AFP_COPY_MODE_NONE) { | |
1455 | strlcpy(ptv->out_iface, afpconfig->out_iface, AFP_IFACE_NAME_LENGTH); | |
1456 | ptv->out_iface[AFP_IFACE_NAME_LENGTH - 1]= '\0'; | |
662dccd8 | 1457 | } |
c85ee1e3 | 1458 | |
e80b30c0 EL |
1459 | #define T_DATA_SIZE 70000 |
1460 | ptv->data = SCMalloc(T_DATA_SIZE); | |
1461 | if (ptv->data == NULL) { | |
45d5c3ca | 1462 | afpconfig->DerefFunc(afpconfig); |
6019ae3d | 1463 | SCFree(ptv); |
e80b30c0 | 1464 | SCReturnInt(TM_ECODE_FAILED); |
c45d8985 | 1465 | } |
e80b30c0 EL |
1466 | ptv->datalen = T_DATA_SIZE; |
1467 | #undef T_DATA_SIZE | |
1468 | ||
c45d8985 | 1469 | *data = (void *)ptv; |
fbca1a4e | 1470 | |
45d5c3ca | 1471 | afpconfig->DerefFunc(afpconfig); |
c45d8985 EL |
1472 | SCReturnInt(TM_ECODE_OK); |
1473 | } | |
1474 | ||
1475 | /** | |
1476 | * \brief This function prints stats to the screen at exit. | |
1477 | * \param tv pointer to ThreadVars | |
1478 | * \param data pointer that gets cast into AFPThreadVars for ptv | |
1479 | */ | |
1480 | void ReceiveAFPThreadExitStats(ThreadVars *tv, void *data) { | |
1481 | SCEnter(); | |
1482 | AFPThreadVars *ptv = (AFPThreadVars *)data; | |
9549faae EL |
1483 | |
1484 | #ifdef PACKET_STATISTICS | |
6efd37a3 EL |
1485 | AFPDumpCounters(ptv, 1); |
1486 | SCLogInfo("(%s) Kernel: Packets %" PRIu64 ", dropped %" PRIu64 "", | |
1487 | tv->name, | |
1488 | (uint64_t) SCPerfGetLocalCounterValue(ptv->capture_kernel_packets, tv->sc_perf_pca), | |
1489 | (uint64_t) SCPerfGetLocalCounterValue(ptv->capture_kernel_drops, tv->sc_perf_pca)); | |
9549faae | 1490 | #endif |
e80b30c0 EL |
1491 | |
1492 | SCLogInfo("(%s) Packets %" PRIu32 ", bytes %" PRIu64 "", tv->name, ptv->pkts, ptv->bytes); | |
c45d8985 EL |
1493 | } |
1494 | ||
1495 | /** | |
1496 | * \brief DeInit function closes af packet socket at exit. | |
1497 | * \param tv pointer to ThreadVars | |
1498 | * \param data pointer that gets cast into AFPThreadVars for ptv | |
1499 | */ | |
1500 | TmEcode ReceiveAFPThreadDeinit(ThreadVars *tv, void *data) { | |
1501 | AFPThreadVars *ptv = (AFPThreadVars *)data; | |
1502 | ||
13f13b6d EL |
1503 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
1504 | ||
e80b30c0 EL |
1505 | if (ptv->data != NULL) { |
1506 | SCFree(ptv->data); | |
1507 | ptv->data = NULL; | |
1508 | } | |
1509 | ptv->datalen = 0; | |
1510 | ||
f2a6fb8a EL |
1511 | ptv->bpf_filter = NULL; |
1512 | ||
c45d8985 EL |
1513 | SCReturnInt(TM_ECODE_OK); |
1514 | } | |
1515 | ||
1516 | /** | |
1517 | * \brief This function passes off to link type decoders. | |
1518 | * | |
1519 | * DecodeAFP reads packets from the PacketQueue and passes | |
1520 | * them off to the proper link type decoder. | |
1521 | * | |
1522 | * \param t pointer to ThreadVars | |
1523 | * \param p pointer to the current packet | |
1524 | * \param data pointer that gets cast into AFPThreadVars for ptv | |
1525 | * \param pq pointer to the current PacketQueue | |
1526 | */ | |
1527 | TmEcode DecodeAFP(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq) | |
1528 | { | |
1529 | SCEnter(); | |
1530 | DecodeThreadVars *dtv = (DecodeThreadVars *)data; | |
1531 | ||
1532 | /* update counters */ | |
1533 | SCPerfCounterIncr(dtv->counter_pkts, tv->sc_perf_pca); | |
1534 | SCPerfCounterIncr(dtv->counter_pkts_per_sec, tv->sc_perf_pca); | |
1535 | ||
1536 | SCPerfCounterAddUI64(dtv->counter_bytes, tv->sc_perf_pca, GET_PKT_LEN(p)); | |
1537 | #if 0 | |
1538 | SCPerfCounterAddDouble(dtv->counter_bytes_per_sec, tv->sc_perf_pca, GET_PKT_LEN(p)); | |
1539 | SCPerfCounterAddDouble(dtv->counter_mbit_per_sec, tv->sc_perf_pca, | |
1540 | (GET_PKT_LEN(p) * 8)/1000000.0); | |
1541 | #endif | |
1542 | ||
1543 | SCPerfCounterAddUI64(dtv->counter_avg_pkt_size, tv->sc_perf_pca, GET_PKT_LEN(p)); | |
1544 | SCPerfCounterSetUI64(dtv->counter_max_pkt_size, tv->sc_perf_pca, GET_PKT_LEN(p)); | |
1545 | ||
1546 | /* call the decoder */ | |
1547 | switch(p->datalink) { | |
1548 | case LINKTYPE_LINUX_SLL: | |
1549 | DecodeSll(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq); | |
1550 | break; | |
1551 | case LINKTYPE_ETHERNET: | |
1552 | DecodeEthernet(tv, dtv, p,GET_PKT_DATA(p), GET_PKT_LEN(p), pq); | |
1553 | break; | |
1554 | case LINKTYPE_PPP: | |
1555 | DecodePPP(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq); | |
1556 | break; | |
1557 | case LINKTYPE_RAW: | |
1558 | DecodeRaw(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), pq); | |
1559 | break; | |
1560 | default: | |
1561 | SCLogError(SC_ERR_DATALINK_UNIMPLEMENTED, "Error: datalink type %" PRId32 " not yet supported in module DecodeAFP", p->datalink); | |
1562 | break; | |
1563 | } | |
1564 | ||
1565 | SCReturnInt(TM_ECODE_OK); | |
1566 | } | |
1567 | ||
1568 | TmEcode DecodeAFPThreadInit(ThreadVars *tv, void *initdata, void **data) | |
1569 | { | |
1570 | SCEnter(); | |
1571 | DecodeThreadVars *dtv = NULL; | |
1572 | ||
1573 | dtv = DecodeThreadVarsAlloc(); | |
1574 | ||
1575 | if (dtv == NULL) | |
1576 | SCReturnInt(TM_ECODE_FAILED); | |
1577 | ||
1578 | DecodeRegisterPerfCounters(dtv, tv); | |
1579 | ||
1580 | *data = (void *)dtv; | |
1581 | ||
1582 | SCReturnInt(TM_ECODE_OK); | |
1583 | } | |
1584 | ||
e80b30c0 | 1585 | #endif /* HAVE_AF_PACKET */ |
c45d8985 | 1586 | /* eof */ |
a6457262 EL |
1587 | /** |
1588 | * @} | |
1589 | */ |