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Commit | Line | Data |
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cde438f6 | 1 | /* Copyright (C) 2011-2018 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 | * | |
c45d8985 EL |
31 | */ |
32 | ||
91e1256b EL |
33 | #define PCAP_DONT_INCLUDE_PCAP_BPF_H 1 |
34 | #define SC_PCAP_DONT_INCLUDE_PCAP_H 1 | |
c45d8985 | 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" | |
17a32bda | 47 | #include "util-cpu.h" |
c45d8985 | 48 | #include "util-debug.h" |
51eb9605 | 49 | #include "util-device.h" |
d65f4585 | 50 | #include "util-ebpf.h" |
c45d8985 EL |
51 | #include "util-error.h" |
52 | #include "util-privs.h" | |
e80b30c0 | 53 | #include "util-optimize.h" |
51eb9605 | 54 | #include "util-checksum.h" |
ac56b1bf | 55 | #include "util-ioctl.h" |
2cd6e128 | 56 | #include "util-host-info.h" |
c45d8985 EL |
57 | #include "tmqh-packetpool.h" |
58 | #include "source-af-packet.h" | |
34b3f194 | 59 | #include "runmodes.h" |
b07bda7a | 60 | #include "flow-storage.h" |
c45d8985 | 61 | |
e80b30c0 | 62 | #ifdef HAVE_AF_PACKET |
472e061c VJ |
63 | |
64 | #if HAVE_SYS_IOCTL_H | |
2bc0be6e | 65 | #include <sys/ioctl.h> |
472e061c VJ |
66 | #endif |
67 | ||
b37554e0 EL |
68 | #if HAVE_LINUX_SOCKIOS_H |
69 | #include <linux/sockios.h> | |
70 | #endif | |
71 | ||
06173267 EL |
72 | #ifdef HAVE_PACKET_EBPF |
73 | #include "util-ebpf.h" | |
74 | #include <bpf/libbpf.h> | |
75 | #include <bpf/bpf.h> | |
76 | #endif | |
77 | ||
91e1256b EL |
78 | struct bpf_program { |
79 | unsigned int bf_len; | |
80 | struct bpf_insn *bf_insns; | |
81 | }; | |
82 | ||
83 | #ifdef HAVE_PCAP_H | |
84 | #include <pcap.h> | |
85 | #endif | |
86 | ||
87 | #ifdef HAVE_PCAP_PCAP_H | |
88 | #include <pcap/pcap.h> | |
89 | #endif | |
90 | ||
28e9e4c8 EL |
91 | #include "util-bpf.h" |
92 | ||
472e061c | 93 | #if HAVE_LINUX_IF_ETHER_H |
c45d8985 | 94 | #include <linux/if_ether.h> |
472e061c VJ |
95 | #endif |
96 | ||
97 | #if HAVE_LINUX_IF_PACKET_H | |
c45d8985 | 98 | #include <linux/if_packet.h> |
472e061c VJ |
99 | #endif |
100 | ||
101 | #if HAVE_LINUX_IF_ARP_H | |
c45d8985 | 102 | #include <linux/if_arp.h> |
472e061c | 103 | #endif |
f2a6fb8a | 104 | |
472e061c | 105 | #if HAVE_LINUX_FILTER_H |
f2a6fb8a | 106 | #include <linux/filter.h> |
e80b30c0 | 107 | #endif |
c45d8985 | 108 | |
472e061c | 109 | #if HAVE_SYS_MMAN_H |
49b7b00f | 110 | #include <sys/mman.h> |
472e061c VJ |
111 | #endif |
112 | ||
a40f08a2 EL |
113 | #ifdef HAVE_HW_TIMESTAMPING |
114 | #include <linux/net_tstamp.h> | |
115 | #endif | |
116 | ||
472e061c | 117 | #endif /* HAVE_AF_PACKET */ |
49b7b00f | 118 | |
c45d8985 EL |
119 | extern int max_pending_packets; |
120 | ||
e80b30c0 EL |
121 | #ifndef HAVE_AF_PACKET |
122 | ||
ab1200fb | 123 | TmEcode NoAFPSupportExit(ThreadVars *, const void *, void **); |
e80b30c0 | 124 | |
8f1d7503 KS |
125 | void TmModuleReceiveAFPRegister (void) |
126 | { | |
e80b30c0 EL |
127 | tmm_modules[TMM_RECEIVEAFP].name = "ReceiveAFP"; |
128 | tmm_modules[TMM_RECEIVEAFP].ThreadInit = NoAFPSupportExit; | |
129 | tmm_modules[TMM_RECEIVEAFP].Func = NULL; | |
130 | tmm_modules[TMM_RECEIVEAFP].ThreadExitPrintStats = NULL; | |
131 | tmm_modules[TMM_RECEIVEAFP].ThreadDeinit = NULL; | |
132 | tmm_modules[TMM_RECEIVEAFP].RegisterTests = NULL; | |
133 | tmm_modules[TMM_RECEIVEAFP].cap_flags = 0; | |
3f1c4efc | 134 | tmm_modules[TMM_RECEIVEAFP].flags = TM_FLAG_RECEIVE_TM; |
e80b30c0 EL |
135 | } |
136 | ||
137 | /** | |
138 | * \brief Registration Function for DecodeAFP. | |
e80b30c0 | 139 | */ |
8f1d7503 KS |
140 | void TmModuleDecodeAFPRegister (void) |
141 | { | |
e80b30c0 EL |
142 | tmm_modules[TMM_DECODEAFP].name = "DecodeAFP"; |
143 | tmm_modules[TMM_DECODEAFP].ThreadInit = NoAFPSupportExit; | |
144 | tmm_modules[TMM_DECODEAFP].Func = NULL; | |
145 | tmm_modules[TMM_DECODEAFP].ThreadExitPrintStats = NULL; | |
146 | tmm_modules[TMM_DECODEAFP].ThreadDeinit = NULL; | |
147 | tmm_modules[TMM_DECODEAFP].RegisterTests = NULL; | |
148 | tmm_modules[TMM_DECODEAFP].cap_flags = 0; | |
bc6cf438 | 149 | tmm_modules[TMM_DECODEAFP].flags = TM_FLAG_DECODE_TM; |
e80b30c0 EL |
150 | } |
151 | ||
152 | /** | |
153 | * \brief this function prints an error message and exits. | |
154 | */ | |
ab1200fb | 155 | TmEcode NoAFPSupportExit(ThreadVars *tv, const void *initdata, void **data) |
e80b30c0 EL |
156 | { |
157 | SCLogError(SC_ERR_NO_AF_PACKET,"Error creating thread %s: you do not have " | |
158 | "support for AF_PACKET enabled, on Linux host please recompile " | |
159 | "with --enable-af-packet", tv->name); | |
160 | exit(EXIT_FAILURE); | |
161 | } | |
162 | ||
163 | #else /* We have AF_PACKET support */ | |
164 | ||
c45d8985 EL |
165 | #define AFP_IFACE_NAME_LENGTH 48 |
166 | ||
167 | #define AFP_STATE_DOWN 0 | |
168 | #define AFP_STATE_UP 1 | |
169 | ||
170 | #define AFP_RECONNECT_TIMEOUT 500000 | |
13f13b6d | 171 | #define AFP_DOWN_COUNTER_INTERVAL 40 |
c45d8985 EL |
172 | |
173 | #define POLL_TIMEOUT 100 | |
174 | ||
4a1a0080 EL |
175 | #ifndef TP_STATUS_USER_BUSY |
176 | /* for new use latest bit available in tp_status */ | |
177 | #define TP_STATUS_USER_BUSY (1 << 31) | |
178 | #endif | |
179 | ||
b603ad62 EL |
180 | #ifndef TP_STATUS_VLAN_VALID |
181 | #define TP_STATUS_VLAN_VALID (1 << 4) | |
182 | #endif | |
183 | ||
62e63e3f EL |
184 | enum { |
185 | AFP_READ_OK, | |
186 | AFP_READ_FAILURE, | |
9efa4ace EL |
187 | /** Error during treatment by other functions of Suricata */ |
188 | AFP_SURI_FAILURE, | |
27b5136b | 189 | AFP_KERNEL_DROP, |
62e63e3f EL |
190 | }; |
191 | ||
1992a227 EL |
192 | enum { |
193 | AFP_FATAL_ERROR = 1, | |
194 | AFP_RECOVERABLE_ERROR, | |
195 | }; | |
196 | ||
49b7b00f EL |
197 | union thdr { |
198 | struct tpacket2_hdr *h2; | |
c2d0d938 | 199 | #ifdef HAVE_TPACKET_V3 |
bae1b03c | 200 | struct tpacket3_hdr *h3; |
c2d0d938 | 201 | #endif |
49b7b00f EL |
202 | void *raw; |
203 | }; | |
204 | ||
06173267 | 205 | static int AFPBypassCallback(Packet *p); |
8c880879 | 206 | static int AFPXDPBypassCallback(Packet *p); |
06173267 | 207 | |
91e1256b | 208 | #define MAX_MAPS 32 |
c45d8985 EL |
209 | /** |
210 | * \brief Structure to hold thread specific variables. | |
211 | */ | |
212 | typedef struct AFPThreadVars_ | |
213 | { | |
69d0d484 VJ |
214 | union AFPRing { |
215 | char *v2; | |
216 | struct iovec *v3; | |
217 | } ring; | |
b797fd92 | 218 | |
c45d8985 | 219 | /* counters */ |
3ce39433 | 220 | uint64_t pkts; |
c45d8985 | 221 | |
ff6365dd EL |
222 | ThreadVars *tv; |
223 | TmSlot *slot; | |
9500d12c EL |
224 | LiveDevice *livedev; |
225 | /* data link type for the thread */ | |
b797fd92 | 226 | uint32_t datalink; |
9500d12c | 227 | |
d65f4585 | 228 | #ifdef HAVE_PACKET_EBPF |
94a622cb | 229 | /* File descriptor of the IPv4 flow bypass table maps */ |
d65f4585 | 230 | int v4_map_fd; |
94a622cb | 231 | /* File descriptor of the IPv6 flow bypass table maps */ |
d65f4585 EL |
232 | int v6_map_fd; |
233 | #endif | |
234 | ||
9500d12c | 235 | unsigned int frame_offset; |
ff6365dd | 236 | |
9500d12c EL |
237 | ChecksumValidationMode checksum_mode; |
238 | ||
b797fd92 | 239 | /* references to packet and drop counters */ |
9500d12c EL |
240 | uint16_t capture_kernel_packets; |
241 | uint16_t capture_kernel_drops; | |
9efa4ace | 242 | uint16_t capture_errors; |
9500d12c EL |
243 | |
244 | /* handle state */ | |
245 | uint8_t afp_state; | |
246 | uint8_t copy_mode; | |
4bfa3aea | 247 | unsigned int flags; |
9500d12c EL |
248 | |
249 | /* IPS peer */ | |
250 | AFPPeer *mpeer; | |
251 | ||
252 | /* no mmap mode */ | |
ff6365dd EL |
253 | uint8_t *data; /** Per function and thread data */ |
254 | int datalen; /** Length of per function and thread data */ | |
9500d12c | 255 | int cooked; |
ff6365dd | 256 | |
9500d12c EL |
257 | /* |
258 | * Init related members | |
259 | */ | |
51eb9605 | 260 | |
9500d12c EL |
261 | /* thread specific socket */ |
262 | int socket; | |
b797fd92 EL |
263 | |
264 | int ring_size; | |
fa902abe | 265 | int block_size; |
234aefdf | 266 | int block_timeout; |
e80b30c0 EL |
267 | /* socket buffer size */ |
268 | int buffer_size; | |
fa902abe | 269 | /* Filter */ |
ab1200fb | 270 | const char *bpf_filter; |
91e1256b EL |
271 | int ebpf_lb_fd; |
272 | int ebpf_filter_fd; | |
9500d12c | 273 | |
df7dbe36 | 274 | int promisc; |
e80b30c0 | 275 | |
9500d12c | 276 | int down_count; |
662dccd8 | 277 | |
e80b30c0 EL |
278 | int cluster_id; |
279 | int cluster_type; | |
c45d8985 | 280 | |
fbca1a4e EL |
281 | int threads; |
282 | ||
69d0d484 VJ |
283 | union AFPTpacketReq { |
284 | struct tpacket_req v2; | |
c2d0d938 | 285 | #ifdef HAVE_TPACKET_V3 |
69d0d484 | 286 | struct tpacket_req3 v3; |
c2d0d938 | 287 | #endif |
69d0d484 | 288 | } req; |
b797fd92 EL |
289 | |
290 | char iface[AFP_IFACE_NAME_LENGTH]; | |
291 | /* IPS output iface */ | |
292 | char out_iface[AFP_IFACE_NAME_LENGTH]; | |
662dccd8 | 293 | |
cba41207 AG |
294 | /* mmap'ed ring buffer */ |
295 | unsigned int ring_buflen; | |
296 | uint8_t *ring_buf; | |
91e1256b | 297 | |
8c880879 EL |
298 | uint8_t xdp_mode; |
299 | ||
36838017 | 300 | #ifdef HAVE_PACKET_EBPF |
4cf53100 | 301 | struct ebpf_timeout_config ebpf_t_config; |
36838017 | 302 | #endif |
315c29a8 | 303 | |
c45d8985 EL |
304 | } AFPThreadVars; |
305 | ||
15e3bdb7 VJ |
306 | static TmEcode ReceiveAFPThreadInit(ThreadVars *, const void *, void **); |
307 | static void ReceiveAFPThreadExitStats(ThreadVars *, void *); | |
308 | static TmEcode ReceiveAFPThreadDeinit(ThreadVars *, void *); | |
309 | static TmEcode ReceiveAFPLoop(ThreadVars *tv, void *data, void *slot); | |
c45d8985 | 310 | |
15e3bdb7 VJ |
311 | static TmEcode DecodeAFPThreadInit(ThreadVars *, const void *, void **); |
312 | static TmEcode DecodeAFPThreadDeinit(ThreadVars *tv, void *data); | |
f8aed4ce | 313 | static TmEcode DecodeAFP(ThreadVars *, Packet *, void *); |
c45d8985 | 314 | |
15e3bdb7 | 315 | static TmEcode AFPSetBPFFilter(AFPThreadVars *ptv); |
662dccd8 | 316 | static int AFPGetIfnumByDev(int fd, const char *ifname, int verbose); |
13f13b6d EL |
317 | static int AFPGetDevFlags(int fd, const char *ifname); |
318 | static int AFPDerefSocket(AFPPeer* peer); | |
319 | static int AFPRefSocket(AFPPeer* peer); | |
f2a6fb8a | 320 | |
19475165 | 321 | |
c45d8985 EL |
322 | /** |
323 | * \brief Registration Function for RecieveAFP. | |
324 | * \todo Unit tests are needed for this module. | |
325 | */ | |
8f1d7503 KS |
326 | void TmModuleReceiveAFPRegister (void) |
327 | { | |
c45d8985 EL |
328 | tmm_modules[TMM_RECEIVEAFP].name = "ReceiveAFP"; |
329 | tmm_modules[TMM_RECEIVEAFP].ThreadInit = ReceiveAFPThreadInit; | |
ff6365dd | 330 | tmm_modules[TMM_RECEIVEAFP].Func = NULL; |
e80b30c0 | 331 | tmm_modules[TMM_RECEIVEAFP].PktAcqLoop = ReceiveAFPLoop; |
57e0bd39 | 332 | tmm_modules[TMM_RECEIVEAFP].PktAcqBreakLoop = NULL; |
c45d8985 | 333 | tmm_modules[TMM_RECEIVEAFP].ThreadExitPrintStats = ReceiveAFPThreadExitStats; |
7127ae2b | 334 | tmm_modules[TMM_RECEIVEAFP].ThreadDeinit = ReceiveAFPThreadDeinit; |
c45d8985 EL |
335 | tmm_modules[TMM_RECEIVEAFP].RegisterTests = NULL; |
336 | tmm_modules[TMM_RECEIVEAFP].cap_flags = SC_CAP_NET_RAW; | |
cd4705e6 | 337 | tmm_modules[TMM_RECEIVEAFP].flags = TM_FLAG_RECEIVE_TM; |
19475165 | 338 | |
c45d8985 EL |
339 | } |
340 | ||
a6457262 EL |
341 | |
342 | /** | |
343 | * \defgroup afppeers AFP peers list | |
344 | * | |
345 | * AF_PACKET has an IPS mode were interface are peered: packet from | |
346 | * on interface are sent the peered interface and the other way. The ::AFPPeer | |
347 | * list is maitaining the list of peers. Each ::AFPPeer is storing the needed | |
348 | * information to be able to send packet on the interface. | |
349 | * A element of the list must not be destroyed during the run of Suricata as it | |
350 | * is used by ::Packet and other threads. | |
351 | * | |
352 | * @{ | |
353 | */ | |
354 | ||
662dccd8 EL |
355 | typedef struct AFPPeersList_ { |
356 | TAILQ_HEAD(, AFPPeer_) peers; /**< Head of list of fragments. */ | |
357 | int cnt; | |
358 | int peered; | |
60400163 EL |
359 | int turn; /**< Next value for initialisation order */ |
360 | SC_ATOMIC_DECLARE(int, reached); /**< Counter used to synchronize start */ | |
662dccd8 EL |
361 | } AFPPeersList; |
362 | ||
363 | /** | |
a6457262 EL |
364 | * \brief Update the peer. |
365 | * | |
366 | * Update the AFPPeer of a thread ie set new state, socket number | |
367 | * or iface index. | |
368 | * | |
662dccd8 | 369 | */ |
ab1200fb | 370 | static void AFPPeerUpdate(AFPThreadVars *ptv) |
662dccd8 EL |
371 | { |
372 | if (ptv->mpeer == NULL) { | |
373 | return; | |
374 | } | |
662dccd8 EL |
375 | (void)SC_ATOMIC_SET(ptv->mpeer->if_idx, AFPGetIfnumByDev(ptv->socket, ptv->iface, 0)); |
376 | (void)SC_ATOMIC_SET(ptv->mpeer->socket, ptv->socket); | |
377 | (void)SC_ATOMIC_SET(ptv->mpeer->state, ptv->afp_state); | |
378 | } | |
379 | ||
a6457262 EL |
380 | /** |
381 | * \brief Clean and free ressource used by an ::AFPPeer | |
382 | */ | |
ab1200fb | 383 | static void AFPPeerClean(AFPPeer *peer) |
662dccd8 EL |
384 | { |
385 | if (peer->flags & AFP_SOCK_PROTECT) | |
386 | SCMutexDestroy(&peer->sock_protect); | |
387 | SC_ATOMIC_DESTROY(peer->socket); | |
388 | SC_ATOMIC_DESTROY(peer->if_idx); | |
389 | SC_ATOMIC_DESTROY(peer->state); | |
390 | SCFree(peer); | |
391 | } | |
392 | ||
393 | AFPPeersList peerslist; | |
394 | ||
395 | ||
a6457262 EL |
396 | /** |
397 | * \brief Init the global list of ::AFPPeer | |
398 | */ | |
662dccd8 EL |
399 | TmEcode AFPPeersListInit() |
400 | { | |
401 | SCEnter(); | |
402 | TAILQ_INIT(&peerslist.peers); | |
403 | peerslist.peered = 0; | |
404 | peerslist.cnt = 0; | |
60400163 EL |
405 | peerslist.turn = 0; |
406 | SC_ATOMIC_INIT(peerslist.reached); | |
407 | (void) SC_ATOMIC_SET(peerslist.reached, 0); | |
662dccd8 EL |
408 | SCReturnInt(TM_ECODE_OK); |
409 | } | |
410 | ||
a6457262 EL |
411 | /** |
412 | * \brief Check that all ::AFPPeer got a peer | |
413 | * | |
414 | * \retval TM_ECODE_FAILED if some threads are not peered or TM_ECODE_OK else. | |
415 | */ | |
662dccd8 EL |
416 | TmEcode AFPPeersListCheck() |
417 | { | |
418 | #define AFP_PEERS_MAX_TRY 4 | |
419 | #define AFP_PEERS_WAIT 20000 | |
420 | int try = 0; | |
421 | SCEnter(); | |
422 | while (try < AFP_PEERS_MAX_TRY) { | |
423 | if (peerslist.cnt != peerslist.peered) { | |
424 | usleep(AFP_PEERS_WAIT); | |
425 | } else { | |
426 | SCReturnInt(TM_ECODE_OK); | |
427 | } | |
428 | try++; | |
429 | } | |
430 | SCLogError(SC_ERR_AFP_CREATE, "Threads number not equals"); | |
431 | SCReturnInt(TM_ECODE_FAILED); | |
432 | } | |
433 | ||
a6457262 EL |
434 | /** |
435 | * \brief Declare a new AFP thread to AFP peers list. | |
436 | */ | |
ab1200fb | 437 | static TmEcode AFPPeersListAdd(AFPThreadVars *ptv) |
662dccd8 EL |
438 | { |
439 | SCEnter(); | |
440 | AFPPeer *peer = SCMalloc(sizeof(AFPPeer)); | |
441 | AFPPeer *pitem; | |
ac56b1bf | 442 | int mtu, out_mtu; |
662dccd8 | 443 | |
e176be6f | 444 | if (unlikely(peer == NULL)) { |
662dccd8 EL |
445 | SCReturnInt(TM_ECODE_FAILED); |
446 | } | |
447 | memset(peer, 0, sizeof(AFPPeer)); | |
448 | SC_ATOMIC_INIT(peer->socket); | |
13f13b6d | 449 | SC_ATOMIC_INIT(peer->sock_usage); |
662dccd8 EL |
450 | SC_ATOMIC_INIT(peer->if_idx); |
451 | SC_ATOMIC_INIT(peer->state); | |
452 | peer->flags = ptv->flags; | |
60400163 | 453 | peer->turn = peerslist.turn++; |
662dccd8 EL |
454 | |
455 | if (peer->flags & AFP_SOCK_PROTECT) { | |
456 | SCMutexInit(&peer->sock_protect, NULL); | |
457 | } | |
458 | ||
13f13b6d | 459 | (void)SC_ATOMIC_SET(peer->sock_usage, 0); |
662dccd8 EL |
460 | (void)SC_ATOMIC_SET(peer->state, AFP_STATE_DOWN); |
461 | strlcpy(peer->iface, ptv->iface, AFP_IFACE_NAME_LENGTH); | |
462 | ptv->mpeer = peer; | |
463 | /* add element to iface list */ | |
464 | TAILQ_INSERT_TAIL(&peerslist.peers, peer, next); | |
662dccd8 | 465 | |
13f13b6d EL |
466 | if (ptv->copy_mode != AFP_COPY_MODE_NONE) { |
467 | peerslist.cnt++; | |
468 | ||
469 | /* Iter to find a peer */ | |
470 | TAILQ_FOREACH(pitem, &peerslist.peers, next) { | |
471 | if (pitem->peer) | |
472 | continue; | |
473 | if (strcmp(pitem->iface, ptv->out_iface)) | |
474 | continue; | |
475 | peer->peer = pitem; | |
476 | pitem->peer = peer; | |
477 | mtu = GetIfaceMTU(ptv->iface); | |
478 | out_mtu = GetIfaceMTU(ptv->out_iface); | |
479 | if (mtu != out_mtu) { | |
480 | SCLogError(SC_ERR_AFP_CREATE, | |
481 | "MTU on %s (%d) and %s (%d) are not equal, " | |
482 | "transmission of packets bigger than %d will fail.", | |
483 | ptv->iface, mtu, | |
484 | ptv->out_iface, out_mtu, | |
485 | (out_mtu > mtu) ? mtu : out_mtu); | |
486 | } | |
487 | peerslist.peered += 2; | |
488 | break; | |
ac56b1bf | 489 | } |
662dccd8 EL |
490 | } |
491 | ||
492 | AFPPeerUpdate(ptv); | |
493 | ||
494 | SCReturnInt(TM_ECODE_OK); | |
495 | } | |
496 | ||
ab1200fb | 497 | static int AFPPeersListWaitTurn(AFPPeer *peer) |
60400163 | 498 | { |
b2691cbe EL |
499 | /* If turn is zero, we already have started threads once */ |
500 | if (peerslist.turn == 0) | |
501 | return 0; | |
502 | ||
60400163 EL |
503 | if (peer->turn == SC_ATOMIC_GET(peerslist.reached)) |
504 | return 0; | |
505 | return 1; | |
506 | } | |
507 | ||
ab1200fb | 508 | static void AFPPeersListReachedInc(void) |
60400163 | 509 | { |
b2691cbe EL |
510 | if (peerslist.turn == 0) |
511 | return; | |
512 | ||
513 | if (SC_ATOMIC_ADD(peerslist.reached, 1) == peerslist.turn) { | |
514 | SCLogInfo("All AFP capture threads are running."); | |
515 | (void)SC_ATOMIC_SET(peerslist.reached, 0); | |
516 | /* Set turn to 0 to skip syncrhonization when ReceiveAFPLoop is | |
517 | * restarted. | |
518 | */ | |
519 | peerslist.turn = 0; | |
520 | } | |
60400163 EL |
521 | } |
522 | ||
ab1200fb | 523 | static int AFPPeersListStarted(void) |
919377d4 EL |
524 | { |
525 | return !peerslist.turn; | |
526 | } | |
527 | ||
a6457262 EL |
528 | /** |
529 | * \brief Clean the global peers list. | |
530 | */ | |
662dccd8 EL |
531 | void AFPPeersListClean() |
532 | { | |
533 | AFPPeer *pitem; | |
534 | ||
535 | while ((pitem = TAILQ_FIRST(&peerslist.peers))) { | |
536 | TAILQ_REMOVE(&peerslist.peers, pitem, next); | |
537 | AFPPeerClean(pitem); | |
538 | } | |
539 | } | |
540 | ||
a6457262 EL |
541 | /** |
542 | * @} | |
543 | */ | |
544 | ||
c45d8985 EL |
545 | /** |
546 | * \brief Registration Function for DecodeAFP. | |
547 | * \todo Unit tests are needed for this module. | |
548 | */ | |
8f1d7503 KS |
549 | void TmModuleDecodeAFPRegister (void) |
550 | { | |
c45d8985 EL |
551 | tmm_modules[TMM_DECODEAFP].name = "DecodeAFP"; |
552 | tmm_modules[TMM_DECODEAFP].ThreadInit = DecodeAFPThreadInit; | |
553 | tmm_modules[TMM_DECODEAFP].Func = DecodeAFP; | |
554 | tmm_modules[TMM_DECODEAFP].ThreadExitPrintStats = NULL; | |
2864f9ee | 555 | tmm_modules[TMM_DECODEAFP].ThreadDeinit = DecodeAFPThreadDeinit; |
c45d8985 EL |
556 | tmm_modules[TMM_DECODEAFP].RegisterTests = NULL; |
557 | tmm_modules[TMM_DECODEAFP].cap_flags = 0; | |
bc6cf438 | 558 | tmm_modules[TMM_DECODEAFP].flags = TM_FLAG_DECODE_TM; |
c45d8985 EL |
559 | } |
560 | ||
662dccd8 | 561 | |
e80b30c0 EL |
562 | static int AFPCreateSocket(AFPThreadVars *ptv, char *devname, int verbose); |
563 | ||
e8a4a4c4 | 564 | static inline void AFPDumpCounters(AFPThreadVars *ptv) |
6efd37a3 | 565 | { |
6efd37a3 | 566 | #ifdef PACKET_STATISTICS |
e8a4a4c4 EL |
567 | struct tpacket_stats kstats; |
568 | socklen_t len = sizeof (struct tpacket_stats); | |
569 | if (getsockopt(ptv->socket, SOL_PACKET, PACKET_STATISTICS, | |
570 | &kstats, &len) > -1) { | |
571 | SCLogDebug("(%s) Kernel: Packets %" PRIu32 ", dropped %" PRIu32 "", | |
572 | ptv->tv->name, | |
573 | kstats.tp_packets, kstats.tp_drops); | |
8992275b VJ |
574 | StatsAddUI64(ptv->tv, ptv->capture_kernel_packets, kstats.tp_packets); |
575 | StatsAddUI64(ptv->tv, ptv->capture_kernel_drops, kstats.tp_drops); | |
3ce39433 EL |
576 | (void) SC_ATOMIC_ADD(ptv->livedev->drop, (uint64_t) kstats.tp_drops); |
577 | (void) SC_ATOMIC_ADD(ptv->livedev->pkts, (uint64_t) kstats.tp_packets); | |
6efd37a3 | 578 | } |
e8a4a4c4 | 579 | #endif |
6efd37a3 | 580 | } |
c45d8985 EL |
581 | |
582 | /** | |
583 | * \brief AF packet read function. | |
584 | * | |
585 | * This function fills | |
586 | * From here the packets are picked up by the DecodeAFP thread. | |
587 | * | |
588 | * \param user pointer to AFPThreadVars | |
589 | * \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success | |
590 | */ | |
ab1200fb | 591 | static int AFPRead(AFPThreadVars *ptv) |
c45d8985 EL |
592 | { |
593 | Packet *p = NULL; | |
594 | /* XXX should try to use read that get directly to packet */ | |
c45d8985 EL |
595 | int offset = 0; |
596 | int caplen; | |
597 | struct sockaddr_ll from; | |
598 | struct iovec iov; | |
599 | struct msghdr msg; | |
c45d8985 EL |
600 | struct cmsghdr *cmsg; |
601 | union { | |
602 | struct cmsghdr cmsg; | |
603 | char buf[CMSG_SPACE(sizeof(struct tpacket_auxdata))]; | |
604 | } cmsg_buf; | |
6efd37a3 | 605 | unsigned char aux_checksum = 0; |
c45d8985 EL |
606 | |
607 | msg.msg_name = &from; | |
608 | msg.msg_namelen = sizeof(from); | |
609 | msg.msg_iov = &iov; | |
610 | msg.msg_iovlen = 1; | |
c45d8985 EL |
611 | msg.msg_control = &cmsg_buf; |
612 | msg.msg_controllen = sizeof(cmsg_buf); | |
c45d8985 EL |
613 | msg.msg_flags = 0; |
614 | ||
615 | if (ptv->cooked) | |
616 | offset = SLL_HEADER_LEN; | |
617 | else | |
618 | offset = 0; | |
e80b30c0 EL |
619 | iov.iov_len = ptv->datalen - offset; |
620 | iov.iov_base = ptv->data + offset; | |
c45d8985 EL |
621 | |
622 | caplen = recvmsg(ptv->socket, &msg, MSG_TRUNC); | |
623 | ||
624 | if (caplen < 0) { | |
625 | SCLogWarning(SC_ERR_AFP_READ, "recvmsg failed with error code %" PRId32, | |
626 | errno); | |
62e63e3f | 627 | SCReturnInt(AFP_READ_FAILURE); |
c45d8985 | 628 | } |
ff6365dd EL |
629 | |
630 | p = PacketGetFromQueueOrAlloc(); | |
c45d8985 | 631 | if (p == NULL) { |
9efa4ace | 632 | SCReturnInt(AFP_SURI_FAILURE); |
c45d8985 | 633 | } |
b33986c8 | 634 | PKT_SET_SRC(p, PKT_SRC_WIRE); |
06173267 EL |
635 | if (ptv->flags & AFP_BYPASS) { |
636 | p->BypassPacketsFlow = AFPBypassCallback; | |
d65f4585 EL |
637 | #ifdef HAVE_PACKET_EBPF |
638 | p->afp_v.v4_map_fd = ptv->v4_map_fd; | |
639 | p->afp_v.v6_map_fd = ptv->v6_map_fd; | |
4cf53100 | 640 | p->afp_v.nr_cpus = ptv->ebpf_t_config.cpus_count; |
d65f4585 | 641 | #endif |
06173267 | 642 | } |
8c880879 EL |
643 | if (ptv->flags & AFP_XDPBYPASS) { |
644 | p->BypassPacketsFlow = AFPXDPBypassCallback; | |
d65f4585 EL |
645 | #ifdef HAVE_PACKET_EBPF |
646 | p->afp_v.v4_map_fd = ptv->v4_map_fd; | |
647 | p->afp_v.v6_map_fd = ptv->v6_map_fd; | |
4cf53100 | 648 | p->afp_v.nr_cpus = ptv->ebpf_t_config.cpus_count; |
d65f4585 | 649 | #endif |
8c880879 | 650 | } |
c45d8985 EL |
651 | |
652 | /* get timestamp of packet via ioctl */ | |
653 | if (ioctl(ptv->socket, SIOCGSTAMP, &p->ts) == -1) { | |
654 | SCLogWarning(SC_ERR_AFP_READ, "recvmsg failed with error code %" PRId32, | |
655 | errno); | |
656 | TmqhOutputPacketpool(ptv->tv, p); | |
62e63e3f | 657 | SCReturnInt(AFP_READ_FAILURE); |
c45d8985 EL |
658 | } |
659 | ||
660 | ptv->pkts++; | |
51eb9605 | 661 | p->livedev = ptv->livedev; |
c45d8985 EL |
662 | |
663 | /* add forged header */ | |
664 | if (ptv->cooked) { | |
e80b30c0 | 665 | SllHdr * hdrp = (SllHdr *)ptv->data; |
c45d8985 EL |
666 | /* XXX this is minimalist, but this seems enough */ |
667 | hdrp->sll_protocol = from.sll_protocol; | |
668 | } | |
669 | ||
670 | p->datalink = ptv->datalink; | |
671 | SET_PKT_LEN(p, caplen + offset); | |
e80b30c0 | 672 | if (PacketCopyData(p, ptv->data, GET_PKT_LEN(p)) == -1) { |
c45d8985 | 673 | TmqhOutputPacketpool(ptv->tv, p); |
9efa4ace | 674 | SCReturnInt(AFP_SURI_FAILURE); |
c45d8985 | 675 | } |
e80b30c0 EL |
676 | SCLogDebug("pktlen: %" PRIu32 " (pkt %p, pkt data %p)", |
677 | GET_PKT_LEN(p), p, GET_PKT_DATA(p)); | |
678 | ||
6062e00c EL |
679 | /* We only check for checksum disable */ |
680 | if (ptv->checksum_mode == CHECKSUM_VALIDATION_DISABLE) { | |
51eb9605 EL |
681 | p->flags |= PKT_IGNORE_CHECKSUM; |
682 | } else if (ptv->checksum_mode == CHECKSUM_VALIDATION_AUTO) { | |
683 | if (ptv->livedev->ignore_checksum) { | |
684 | p->flags |= PKT_IGNORE_CHECKSUM; | |
a565148f | 685 | } else if (ChecksumAutoModeCheck(ptv->pkts, |
51eb9605 EL |
686 | SC_ATOMIC_GET(ptv->livedev->pkts), |
687 | SC_ATOMIC_GET(ptv->livedev->invalid_checksums))) { | |
688 | ptv->livedev->ignore_checksum = 1; | |
6062e00c | 689 | p->flags |= PKT_IGNORE_CHECKSUM; |
51eb9605 | 690 | } |
6062e00c | 691 | } else { |
6efd37a3 EL |
692 | aux_checksum = 1; |
693 | } | |
6062e00c | 694 | |
6efd37a3 EL |
695 | /* List is NULL if we don't have activated auxiliary data */ |
696 | for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { | |
697 | struct tpacket_auxdata *aux; | |
f6ddaf33 | 698 | |
6efd37a3 EL |
699 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct tpacket_auxdata)) || |
700 | cmsg->cmsg_level != SOL_PACKET || | |
701 | cmsg->cmsg_type != PACKET_AUXDATA) | |
702 | continue; | |
f6ddaf33 | 703 | |
6efd37a3 EL |
704 | aux = (struct tpacket_auxdata *)CMSG_DATA(cmsg); |
705 | ||
706 | if (aux_checksum && (aux->tp_status & TP_STATUS_CSUMNOTREADY)) { | |
707 | p->flags |= PKT_IGNORE_CHECKSUM; | |
f6ddaf33 | 708 | } |
6efd37a3 | 709 | break; |
f6ddaf33 EL |
710 | } |
711 | ||
c469824b | 712 | if (TmThreadsSlotProcessPkt(ptv->tv, ptv->slot, p) != TM_ECODE_OK) { |
9efa4ace | 713 | SCReturnInt(AFP_SURI_FAILURE); |
c469824b | 714 | } |
62e63e3f | 715 | SCReturnInt(AFP_READ_OK); |
c45d8985 EL |
716 | } |
717 | ||
ecf59be4 EL |
718 | /** |
719 | * \brief AF packet write function. | |
720 | * | |
721 | * This function has to be called before the memory | |
722 | * related to Packet in ring buffer is released. | |
723 | * | |
724 | * \param pointer to Packet | |
725 | * \param version of capture: TPACKET_V2 or TPACKET_V3 | |
726 | * \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success | |
727 | * | |
728 | */ | |
729 | static TmEcode AFPWritePacket(Packet *p, int version) | |
662dccd8 EL |
730 | { |
731 | struct sockaddr_ll socket_address; | |
732 | int socket; | |
ecf59be4 EL |
733 | uint8_t *pstart; |
734 | size_t plen; | |
ee7e689b AG |
735 | union thdr h; |
736 | uint16_t vlan_tci = 0; | |
662dccd8 EL |
737 | |
738 | if (p->afp_v.copy_mode == AFP_COPY_MODE_IPS) { | |
3f107fa1 | 739 | if (PACKET_TEST_ACTION(p, ACTION_DROP)) { |
662dccd8 EL |
740 | return TM_ECODE_OK; |
741 | } | |
742 | } | |
743 | ||
744 | if (SC_ATOMIC_GET(p->afp_v.peer->state) == AFP_STATE_DOWN) | |
745 | return TM_ECODE_OK; | |
746 | ||
747 | if (p->ethh == NULL) { | |
748 | SCLogWarning(SC_ERR_INVALID_VALUE, "Should have an Ethernet header"); | |
749 | return TM_ECODE_FAILED; | |
750 | } | |
751 | /* Index of the network device */ | |
752 | socket_address.sll_ifindex = SC_ATOMIC_GET(p->afp_v.peer->if_idx); | |
753 | /* Address length*/ | |
754 | socket_address.sll_halen = ETH_ALEN; | |
755 | /* Destination MAC */ | |
756 | memcpy(socket_address.sll_addr, p->ethh, 6); | |
757 | ||
758 | /* Send packet, locking the socket if necessary */ | |
759 | if (p->afp_v.peer->flags & AFP_SOCK_PROTECT) | |
760 | SCMutexLock(&p->afp_v.peer->sock_protect); | |
761 | socket = SC_ATOMIC_GET(p->afp_v.peer->socket); | |
ecf59be4 | 762 | |
ee7e689b AG |
763 | h.raw = p->afp_v.relptr; |
764 | ||
ecf59be4 | 765 | if (version == TPACKET_V2) { |
ecf59be4 EL |
766 | /* Copy VLAN header from ring memory. For post june 2011 kernel we test |
767 | * the flag. It is not defined for older kernel so we go best effort | |
768 | * and test for non zero value of the TCI header. */ | |
769 | if (h.h2->tp_status & TP_STATUS_VLAN_VALID || h.h2->tp_vlan_tci) { | |
ee7e689b AG |
770 | vlan_tci = h.h2->tp_vlan_tci; |
771 | } | |
772 | } else { | |
773 | #ifdef HAVE_TPACKET_V3 | |
774 | if (h.h3->tp_status & TP_STATUS_VLAN_VALID || h.h3->hv1.tp_vlan_tci) { | |
775 | vlan_tci = h.h3->hv1.tp_vlan_tci; | |
ecf59be4 | 776 | } |
ee7e689b AG |
777 | #else |
778 | /* Should not get here */ | |
779 | BUG_ON(1); | |
780 | #endif | |
781 | } | |
782 | ||
783 | if (vlan_tci != 0) { | |
784 | pstart = GET_PKT_DATA(p) - VLAN_HEADER_LEN; | |
785 | plen = GET_PKT_LEN(p) + VLAN_HEADER_LEN; | |
786 | /* move ethernet addresses */ | |
787 | memmove(pstart, GET_PKT_DATA(p), 2 * ETH_ALEN); | |
788 | /* write vlan info */ | |
789 | *(uint16_t *)(pstart + 2 * ETH_ALEN) = htons(0x8100); | |
790 | *(uint16_t *)(pstart + 2 * ETH_ALEN + 2) = htons(vlan_tci); | |
ecf59be4 EL |
791 | } else { |
792 | pstart = GET_PKT_DATA(p); | |
793 | plen = GET_PKT_LEN(p); | |
794 | } | |
795 | ||
796 | if (sendto(socket, pstart, plen, 0, | |
662dccd8 EL |
797 | (struct sockaddr*) &socket_address, |
798 | sizeof(struct sockaddr_ll)) < 0) { | |
799 | SCLogWarning(SC_ERR_SOCKET, "Sending packet failed on socket %d: %s", | |
800 | socket, | |
801 | strerror(errno)); | |
802 | if (p->afp_v.peer->flags & AFP_SOCK_PROTECT) | |
803 | SCMutexUnlock(&p->afp_v.peer->sock_protect); | |
804 | return TM_ECODE_FAILED; | |
805 | } | |
806 | if (p->afp_v.peer->flags & AFP_SOCK_PROTECT) | |
807 | SCMutexUnlock(&p->afp_v.peer->sock_protect); | |
808 | ||
809 | return TM_ECODE_OK; | |
810 | } | |
811 | ||
ab1200fb | 812 | static void AFPReleaseDataFromRing(Packet *p) |
2011a3f8 | 813 | { |
662dccd8 EL |
814 | /* Need to be in copy mode and need to detect early release |
815 | where Ethernet header could not be set (and pseudo packet) */ | |
816 | if ((p->afp_v.copy_mode != AFP_COPY_MODE_NONE) && !PKT_IS_PSEUDOPKT(p)) { | |
ecf59be4 | 817 | AFPWritePacket(p, TPACKET_V2); |
662dccd8 | 818 | } |
13f13b6d EL |
819 | |
820 | if (AFPDerefSocket(p->afp_v.mpeer) == 0) | |
680e941a | 821 | goto cleanup; |
13f13b6d | 822 | |
2011a3f8 EL |
823 | if (p->afp_v.relptr) { |
824 | union thdr h; | |
825 | h.raw = p->afp_v.relptr; | |
826 | h.h2->tp_status = TP_STATUS_KERNEL; | |
2011a3f8 | 827 | } |
680e941a EL |
828 | |
829 | cleanup: | |
830 | AFPV_CLEANUP(&p->afp_v); | |
b076a26c KS |
831 | } |
832 | ||
ecf59be4 | 833 | #ifdef HAVE_TPACKET_V3 |
ab1200fb | 834 | static void AFPReleasePacketV3(Packet *p) |
bae1b03c EL |
835 | { |
836 | /* Need to be in copy mode and need to detect early release | |
837 | where Ethernet header could not be set (and pseudo packet) */ | |
838 | if ((p->afp_v.copy_mode != AFP_COPY_MODE_NONE) && !PKT_IS_PSEUDOPKT(p)) { | |
ecf59be4 | 839 | AFPWritePacket(p, TPACKET_V3); |
bae1b03c EL |
840 | } |
841 | PacketFreeOrRelease(p); | |
842 | } | |
ecf59be4 | 843 | #endif |
bae1b03c | 844 | |
ab1200fb | 845 | static void AFPReleasePacket(Packet *p) |
b076a26c KS |
846 | { |
847 | AFPReleaseDataFromRing(p); | |
848 | PacketFreeOrRelease(p); | |
2011a3f8 EL |
849 | } |
850 | ||
49b7b00f EL |
851 | /** |
852 | * \brief AF packet read function for ring | |
853 | * | |
854 | * This function fills | |
855 | * From here the packets are picked up by the DecodeAFP thread. | |
856 | * | |
857 | * \param user pointer to AFPThreadVars | |
858 | * \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success | |
859 | */ | |
ab1200fb | 860 | static int AFPReadFromRing(AFPThreadVars *ptv) |
49b7b00f EL |
861 | { |
862 | Packet *p = NULL; | |
863 | union thdr h; | |
27b5136b | 864 | uint8_t emergency_flush = 0; |
4d8f70c6 | 865 | int read_pkts = 0; |
b26ec603 | 866 | int loop_start = -1; |
4d8f70c6 | 867 | |
49b7b00f | 868 | |
a369f8c3 EL |
869 | /* Loop till we have packets available */ |
870 | while (1) { | |
53c02334 AS |
871 | if (unlikely(suricata_ctl_flags != 0)) { |
872 | break; | |
873 | } | |
874 | ||
a369f8c3 | 875 | /* Read packet from ring */ |
69d0d484 | 876 | h.raw = (((union thdr **)ptv->ring.v2)[ptv->frame_offset]); |
9efa4ace EL |
877 | if (unlikely(h.raw == NULL)) { |
878 | /* Impossible we reach this point in normal condition, so trigger | |
879 | * a failure in reading */ | |
880 | SCReturnInt(AFP_READ_FAILURE); | |
34b3f194 | 881 | } |
662dccd8 | 882 | |
82a2dd85 | 883 | if ((! h.h2->tp_status) || (h.h2->tp_status & TP_STATUS_USER_BUSY)) { |
4d8f70c6 | 884 | if (read_pkts == 0) { |
b26ec603 EL |
885 | if (loop_start == -1) { |
886 | loop_start = ptv->frame_offset; | |
887 | } else if (unlikely(loop_start == (int)ptv->frame_offset)) { | |
888 | SCReturnInt(AFP_READ_OK); | |
889 | } | |
69d0d484 | 890 | if (++ptv->frame_offset >= ptv->req.v2.tp_frame_nr) { |
b26ec603 EL |
891 | ptv->frame_offset = 0; |
892 | } | |
893 | continue; | |
4d8f70c6 | 894 | } |
27b5136b EL |
895 | if ((emergency_flush) && (ptv->flags & AFP_EMERGENCY_MODE)) { |
896 | SCReturnInt(AFP_KERNEL_DROP); | |
897 | } else { | |
898 | SCReturnInt(AFP_READ_OK); | |
899 | } | |
900 | } | |
4d8f70c6 EL |
901 | |
902 | read_pkts++; | |
b26ec603 | 903 | loop_start = -1; |
4d8f70c6 | 904 | |
4a1a0080 EL |
905 | /* Our packet is still used by suricata, we exit read loop to |
906 | * gain some time */ | |
907 | if (h.h2->tp_status & TP_STATUS_USER_BUSY) { | |
908 | SCReturnInt(AFP_READ_OK); | |
909 | } | |
910 | ||
27b5136b EL |
911 | if ((ptv->flags & AFP_EMERGENCY_MODE) && (emergency_flush == 1)) { |
912 | h.h2->tp_status = TP_STATUS_KERNEL; | |
913 | goto next_frame; | |
a369f8c3 EL |
914 | } |
915 | ||
916 | p = PacketGetFromQueueOrAlloc(); | |
917 | if (p == NULL) { | |
9efa4ace | 918 | SCReturnInt(AFP_SURI_FAILURE); |
34b3f194 | 919 | } |
b33986c8 | 920 | PKT_SET_SRC(p, PKT_SRC_WIRE); |
06173267 EL |
921 | if (ptv->flags & AFP_BYPASS) { |
922 | p->BypassPacketsFlow = AFPBypassCallback; | |
d65f4585 | 923 | #ifdef HAVE_PACKET_EBPF |
6062c27e EL |
924 | p->afp_v.v4_map_fd = ptv->v4_map_fd; |
925 | p->afp_v.v6_map_fd = ptv->v6_map_fd; | |
4cf53100 | 926 | p->afp_v.nr_cpus = ptv->ebpf_t_config.cpus_count; |
d65f4585 | 927 | #endif |
06173267 | 928 | } |
8c880879 EL |
929 | if (ptv->flags & AFP_XDPBYPASS) { |
930 | p->BypassPacketsFlow = AFPXDPBypassCallback; | |
d65f4585 | 931 | #ifdef HAVE_PACKET_EBPF |
6062c27e EL |
932 | p->afp_v.v4_map_fd = ptv->v4_map_fd; |
933 | p->afp_v.v6_map_fd = ptv->v6_map_fd; | |
4cf53100 | 934 | p->afp_v.nr_cpus = ptv->ebpf_t_config.cpus_count; |
d65f4585 | 935 | #endif |
8c880879 | 936 | } |
49b7b00f | 937 | |
4a1a0080 EL |
938 | /* Suricata will treat packet so telling it is busy, this |
939 | * status will be reset to 0 (ie TP_STATUS_KERNEL) in the release | |
940 | * function. */ | |
941 | h.h2->tp_status |= TP_STATUS_USER_BUSY; | |
942 | ||
a369f8c3 | 943 | ptv->pkts++; |
a369f8c3 | 944 | p->livedev = ptv->livedev; |
a369f8c3 | 945 | p->datalink = ptv->datalink; |
d0940396 | 946 | |
a369f8c3 EL |
947 | if (h.h2->tp_len > h.h2->tp_snaplen) { |
948 | SCLogDebug("Packet length (%d) > snaplen (%d), truncating", | |
949 | h.h2->tp_len, h.h2->tp_snaplen); | |
950 | } | |
71e47868 EL |
951 | |
952 | /* get vlan id from header */ | |
bcc03f17 | 953 | if ((ptv->flags & AFP_VLAN_IN_HEADER) && |
e871f713 | 954 | (h.h2->tp_status & TP_STATUS_VLAN_VALID || h.h2->tp_vlan_tci)) { |
01a8cc4e | 955 | p->vlan_id[0] = h.h2->tp_vlan_tci & 0x0fff; |
71e47868 | 956 | p->vlan_idx = 1; |
71e47868 EL |
957 | } |
958 | ||
a369f8c3 EL |
959 | if (ptv->flags & AFP_ZERO_COPY) { |
960 | if (PacketSetData(p, (unsigned char*)h.raw + h.h2->tp_mac, h.h2->tp_snaplen) == -1) { | |
961 | TmqhOutputPacketpool(ptv->tv, p); | |
9efa4ace | 962 | SCReturnInt(AFP_SURI_FAILURE); |
662dccd8 | 963 | } else { |
0f2b3406 | 964 | p->afp_v.relptr = h.raw; |
b076a26c | 965 | p->ReleasePacket = AFPReleasePacket; |
5f12b234 EL |
966 | p->afp_v.mpeer = ptv->mpeer; |
967 | AFPRefSocket(ptv->mpeer); | |
0f2b3406 EL |
968 | |
969 | p->afp_v.copy_mode = ptv->copy_mode; | |
970 | if (p->afp_v.copy_mode != AFP_COPY_MODE_NONE) { | |
971 | p->afp_v.peer = ptv->mpeer->peer; | |
972 | } else { | |
973 | p->afp_v.peer = NULL; | |
662dccd8 | 974 | } |
a369f8c3 EL |
975 | } |
976 | } else { | |
977 | if (PacketCopyData(p, (unsigned char*)h.raw + h.h2->tp_mac, h.h2->tp_snaplen) == -1) { | |
9efa4ace EL |
978 | /* As we can possibly fail to copy the data due to invalid data, let's |
979 | * skip this packet and switch to the next one. | |
980 | */ | |
981 | h.h2->tp_status = TP_STATUS_KERNEL; | |
69d0d484 | 982 | if (++ptv->frame_offset >= ptv->req.v2.tp_frame_nr) { |
9efa4ace EL |
983 | ptv->frame_offset = 0; |
984 | } | |
a369f8c3 | 985 | TmqhOutputPacketpool(ptv->tv, p); |
9efa4ace | 986 | SCReturnInt(AFP_SURI_FAILURE); |
a369f8c3 EL |
987 | } |
988 | } | |
d65f4585 | 989 | |
a369f8c3 EL |
990 | /* Timestamp */ |
991 | p->ts.tv_sec = h.h2->tp_sec; | |
992 | p->ts.tv_usec = h.h2->tp_nsec/1000; | |
993 | SCLogDebug("pktlen: %" PRIu32 " (pkt %p, pkt data %p)", | |
994 | GET_PKT_LEN(p), p, GET_PKT_DATA(p)); | |
995 | ||
996 | /* We only check for checksum disable */ | |
997 | if (ptv->checksum_mode == CHECKSUM_VALIDATION_DISABLE) { | |
998 | p->flags |= PKT_IGNORE_CHECKSUM; | |
999 | } else if (ptv->checksum_mode == CHECKSUM_VALIDATION_AUTO) { | |
1000 | if (ptv->livedev->ignore_checksum) { | |
1001 | p->flags |= PKT_IGNORE_CHECKSUM; | |
1002 | } else if (ChecksumAutoModeCheck(ptv->pkts, | |
1003 | SC_ATOMIC_GET(ptv->livedev->pkts), | |
1004 | SC_ATOMIC_GET(ptv->livedev->invalid_checksums))) { | |
1005 | ptv->livedev->ignore_checksum = 1; | |
1006 | p->flags |= PKT_IGNORE_CHECKSUM; | |
1007 | } | |
1008 | } else { | |
1009 | if (h.h2->tp_status & TP_STATUS_CSUMNOTREADY) { | |
49b7b00f | 1010 | p->flags |= PKT_IGNORE_CHECKSUM; |
a369f8c3 | 1011 | } |
ee6ba099 EL |
1012 | } |
1013 | if (h.h2->tp_status & TP_STATUS_LOSING) { | |
1014 | emergency_flush = 1; | |
e8a4a4c4 | 1015 | AFPDumpCounters(ptv); |
a369f8c3 EL |
1016 | } |
1017 | ||
5f12b234 EL |
1018 | /* release frame if not in zero copy mode */ |
1019 | if (!(ptv->flags & AFP_ZERO_COPY)) { | |
1020 | h.h2->tp_status = TP_STATUS_KERNEL; | |
1021 | } | |
1022 | ||
a369f8c3 EL |
1023 | if (TmThreadsSlotProcessPkt(ptv->tv, ptv->slot, p) != TM_ECODE_OK) { |
1024 | h.h2->tp_status = TP_STATUS_KERNEL; | |
69d0d484 | 1025 | if (++ptv->frame_offset >= ptv->req.v2.tp_frame_nr) { |
a369f8c3 EL |
1026 | ptv->frame_offset = 0; |
1027 | } | |
9efa4ace | 1028 | SCReturnInt(AFP_SURI_FAILURE); |
49b7b00f | 1029 | } |
49b7b00f | 1030 | |
27b5136b | 1031 | next_frame: |
69d0d484 | 1032 | if (++ptv->frame_offset >= ptv->req.v2.tp_frame_nr) { |
34b3f194 | 1033 | ptv->frame_offset = 0; |
350d7619 EL |
1034 | /* Get out of loop to be sure we will reach maintenance tasks */ |
1035 | SCReturnInt(AFP_READ_OK); | |
34b3f194 | 1036 | } |
34b3f194 EL |
1037 | } |
1038 | ||
49b7b00f EL |
1039 | SCReturnInt(AFP_READ_OK); |
1040 | } | |
1041 | ||
f947539d | 1042 | #ifdef HAVE_TPACKET_V3 |
bae1b03c EL |
1043 | static inline void AFPFlushBlock(struct tpacket_block_desc *pbd) |
1044 | { | |
1045 | pbd->hdr.bh1.block_status = TP_STATUS_KERNEL; | |
1046 | } | |
1047 | ||
1048 | static inline int AFPParsePacketV3(AFPThreadVars *ptv, struct tpacket_block_desc *pbd, struct tpacket3_hdr *ppd) | |
1049 | { | |
1050 | Packet *p = PacketGetFromQueueOrAlloc(); | |
1051 | if (p == NULL) { | |
9efa4ace | 1052 | SCReturnInt(AFP_SURI_FAILURE); |
bae1b03c EL |
1053 | } |
1054 | PKT_SET_SRC(p, PKT_SRC_WIRE); | |
06173267 EL |
1055 | if (ptv->flags & AFP_BYPASS) { |
1056 | p->BypassPacketsFlow = AFPBypassCallback; | |
d65f4585 | 1057 | #ifdef HAVE_PACKET_EBPF |
6062c27e EL |
1058 | p->afp_v.v4_map_fd = ptv->v4_map_fd; |
1059 | p->afp_v.v6_map_fd = ptv->v6_map_fd; | |
4cf53100 | 1060 | p->afp_v.nr_cpus = ptv->ebpf_t_config.cpus_count; |
d65f4585 | 1061 | #endif |
e98b5e49 | 1062 | } else if (ptv->flags & AFP_XDPBYPASS) { |
8c880879 | 1063 | p->BypassPacketsFlow = AFPXDPBypassCallback; |
d65f4585 | 1064 | #ifdef HAVE_PACKET_EBPF |
6062c27e EL |
1065 | p->afp_v.v4_map_fd = ptv->v4_map_fd; |
1066 | p->afp_v.v6_map_fd = ptv->v6_map_fd; | |
4cf53100 | 1067 | p->afp_v.nr_cpus = ptv->ebpf_t_config.cpus_count; |
d65f4585 | 1068 | #endif |
8c880879 | 1069 | } |
bae1b03c EL |
1070 | |
1071 | ptv->pkts++; | |
bae1b03c EL |
1072 | p->livedev = ptv->livedev; |
1073 | p->datalink = ptv->datalink; | |
1074 | ||
bcc03f17 | 1075 | if ((ptv->flags & AFP_VLAN_IN_HEADER) && |
e41a9d63 AG |
1076 | (ppd->tp_status & TP_STATUS_VLAN_VALID || ppd->hv1.tp_vlan_tci)) { |
1077 | p->vlan_id[0] = ppd->hv1.tp_vlan_tci & 0x0fff; | |
1078 | p->vlan_idx = 1; | |
e41a9d63 AG |
1079 | } |
1080 | ||
bae1b03c EL |
1081 | if (ptv->flags & AFP_ZERO_COPY) { |
1082 | if (PacketSetData(p, (unsigned char*)ppd + ppd->tp_mac, ppd->tp_snaplen) == -1) { | |
1083 | TmqhOutputPacketpool(ptv->tv, p); | |
9efa4ace | 1084 | SCReturnInt(AFP_SURI_FAILURE); |
bae1b03c | 1085 | } |
310b27a1 | 1086 | p->afp_v.relptr = ppd; |
bae1b03c EL |
1087 | p->ReleasePacket = AFPReleasePacketV3; |
1088 | p->afp_v.mpeer = ptv->mpeer; | |
1089 | AFPRefSocket(ptv->mpeer); | |
1090 | ||
1091 | p->afp_v.copy_mode = ptv->copy_mode; | |
1092 | if (p->afp_v.copy_mode != AFP_COPY_MODE_NONE) { | |
1093 | p->afp_v.peer = ptv->mpeer->peer; | |
1094 | } else { | |
1095 | p->afp_v.peer = NULL; | |
1096 | } | |
1097 | } else { | |
1098 | if (PacketCopyData(p, (unsigned char*)ppd + ppd->tp_mac, ppd->tp_snaplen) == -1) { | |
1099 | TmqhOutputPacketpool(ptv->tv, p); | |
9efa4ace | 1100 | SCReturnInt(AFP_SURI_FAILURE); |
bae1b03c EL |
1101 | } |
1102 | } | |
1103 | /* Timestamp */ | |
1104 | p->ts.tv_sec = ppd->tp_sec; | |
1105 | p->ts.tv_usec = ppd->tp_nsec/1000; | |
1106 | SCLogDebug("pktlen: %" PRIu32 " (pkt %p, pkt data %p)", | |
1107 | GET_PKT_LEN(p), p, GET_PKT_DATA(p)); | |
1108 | ||
1109 | /* We only check for checksum disable */ | |
1110 | if (ptv->checksum_mode == CHECKSUM_VALIDATION_DISABLE) { | |
1111 | p->flags |= PKT_IGNORE_CHECKSUM; | |
1112 | } else if (ptv->checksum_mode == CHECKSUM_VALIDATION_AUTO) { | |
1113 | if (ptv->livedev->ignore_checksum) { | |
1114 | p->flags |= PKT_IGNORE_CHECKSUM; | |
1115 | } else if (ChecksumAutoModeCheck(ptv->pkts, | |
1116 | SC_ATOMIC_GET(ptv->livedev->pkts), | |
1117 | SC_ATOMIC_GET(ptv->livedev->invalid_checksums))) { | |
1118 | ptv->livedev->ignore_checksum = 1; | |
1119 | p->flags |= PKT_IGNORE_CHECKSUM; | |
1120 | } | |
1121 | } else { | |
1122 | if (ppd->tp_status & TP_STATUS_CSUMNOTREADY) { | |
1123 | p->flags |= PKT_IGNORE_CHECKSUM; | |
1124 | } | |
1125 | } | |
1126 | ||
1127 | if (TmThreadsSlotProcessPkt(ptv->tv, ptv->slot, p) != TM_ECODE_OK) { | |
9efa4ace | 1128 | SCReturnInt(AFP_SURI_FAILURE); |
bae1b03c EL |
1129 | } |
1130 | ||
1131 | SCReturnInt(AFP_READ_OK); | |
1132 | } | |
1133 | ||
1134 | static inline int AFPWalkBlock(AFPThreadVars *ptv, struct tpacket_block_desc *pbd) | |
1135 | { | |
1136 | int num_pkts = pbd->hdr.bh1.num_pkts, i; | |
1137 | uint8_t *ppd; | |
9efa4ace | 1138 | int ret = 0; |
bae1b03c EL |
1139 | |
1140 | ppd = (uint8_t *)pbd + pbd->hdr.bh1.offset_to_first_pkt; | |
1141 | for (i = 0; i < num_pkts; ++i) { | |
9efa4ace EL |
1142 | ret = AFPParsePacketV3(ptv, pbd, |
1143 | (struct tpacket3_hdr *)ppd); | |
1144 | switch (ret) { | |
1145 | case AFP_READ_OK: | |
1146 | break; | |
1147 | case AFP_SURI_FAILURE: | |
1148 | /* Internal error but let's just continue and | |
1149 | * treat thenext packet */ | |
1150 | break; | |
1151 | case AFP_READ_FAILURE: | |
1152 | SCReturnInt(AFP_READ_FAILURE); | |
1153 | default: | |
1154 | SCReturnInt(ret); | |
5f84b55d | 1155 | } |
bae1b03c EL |
1156 | ppd = ppd + ((struct tpacket3_hdr *)ppd)->tp_next_offset; |
1157 | } | |
1158 | ||
1159 | SCReturnInt(AFP_READ_OK); | |
1160 | } | |
f947539d | 1161 | #endif /* HAVE_TPACKET_V3 */ |
bae1b03c EL |
1162 | |
1163 | /** | |
1164 | * \brief AF packet read function for ring | |
1165 | * | |
1166 | * This function fills | |
1167 | * From here the packets are picked up by the DecodeAFP thread. | |
1168 | * | |
1169 | * \param user pointer to AFPThreadVars | |
1170 | * \retval TM_ECODE_FAILED on failure and TM_ECODE_OK on success | |
1171 | */ | |
ab1200fb | 1172 | static int AFPReadFromRingV3(AFPThreadVars *ptv) |
bae1b03c | 1173 | { |
c2d0d938 | 1174 | #ifdef HAVE_TPACKET_V3 |
bae1b03c | 1175 | struct tpacket_block_desc *pbd; |
9efa4ace | 1176 | int ret = 0; |
bae1b03c EL |
1177 | |
1178 | /* Loop till we have packets available */ | |
1179 | while (1) { | |
1180 | if (unlikely(suricata_ctl_flags != 0)) { | |
1181 | SCLogInfo("Exiting AFP V3 read loop"); | |
1182 | break; | |
1183 | } | |
1184 | ||
69d0d484 | 1185 | pbd = (struct tpacket_block_desc *) ptv->ring.v3[ptv->frame_offset].iov_base; |
bae1b03c EL |
1186 | |
1187 | /* block is not ready to be read */ | |
1188 | if ((pbd->hdr.bh1.block_status & TP_STATUS_USER) == 0) { | |
1189 | SCReturnInt(AFP_READ_OK); | |
1190 | } | |
1191 | ||
9efa4ace EL |
1192 | ret = AFPWalkBlock(ptv, pbd); |
1193 | if (unlikely(ret != AFP_READ_OK)) { | |
bae1b03c | 1194 | AFPFlushBlock(pbd); |
9efa4ace | 1195 | SCReturnInt(ret); |
bae1b03c EL |
1196 | } |
1197 | ||
1198 | AFPFlushBlock(pbd); | |
69d0d484 | 1199 | ptv->frame_offset = (ptv->frame_offset + 1) % ptv->req.v3.tp_block_nr; |
bae1b03c EL |
1200 | /* return to maintenance task after one loop on the ring */ |
1201 | if (ptv->frame_offset == 0) { | |
1202 | SCReturnInt(AFP_READ_OK); | |
1203 | } | |
1204 | } | |
c2d0d938 | 1205 | #endif |
bae1b03c EL |
1206 | SCReturnInt(AFP_READ_OK); |
1207 | } | |
1208 | ||
13f13b6d EL |
1209 | /** |
1210 | * \brief Reference socket | |
1211 | * | |
1212 | * \retval O in case of failure, 1 in case of success | |
1213 | */ | |
1214 | static int AFPRefSocket(AFPPeer* peer) | |
1215 | { | |
1216 | if (unlikely(peer == NULL)) | |
1217 | return 0; | |
1218 | ||
1219 | (void)SC_ATOMIC_ADD(peer->sock_usage, 1); | |
1220 | return 1; | |
1221 | } | |
1222 | ||
1223 | ||
1224 | /** | |
1225 | * \brief Dereference socket | |
1226 | * | |
1227 | * \retval 1 if socket is still alive, 0 if not | |
1228 | */ | |
1229 | static int AFPDerefSocket(AFPPeer* peer) | |
1230 | { | |
4424f5a2 EL |
1231 | if (peer == NULL) |
1232 | return 1; | |
1233 | ||
13f13b6d EL |
1234 | if (SC_ATOMIC_SUB(peer->sock_usage, 1) == 0) { |
1235 | if (SC_ATOMIC_GET(peer->state) == AFP_STATE_DOWN) { | |
1236 | SCLogInfo("Cleaning socket connected to '%s'", peer->iface); | |
1237 | close(SC_ATOMIC_GET(peer->socket)); | |
1238 | return 0; | |
1239 | } | |
1240 | } | |
1241 | return 1; | |
1242 | } | |
1243 | ||
ab1200fb | 1244 | static void AFPSwitchState(AFPThreadVars *ptv, int state) |
13f13b6d EL |
1245 | { |
1246 | ptv->afp_state = state; | |
1247 | ptv->down_count = 0; | |
49b7b00f | 1248 | |
13f13b6d EL |
1249 | AFPPeerUpdate(ptv); |
1250 | ||
1251 | /* Do cleaning if switching to down state */ | |
1252 | if (state == AFP_STATE_DOWN) { | |
5f84b55d EL |
1253 | #ifdef HAVE_TPACKET_V3 |
1254 | if (ptv->flags & AFP_TPACKET_V3) { | |
69d0d484 VJ |
1255 | if (!ptv->ring.v3) { |
1256 | SCFree(ptv->ring.v3); | |
1257 | ptv->ring.v3 = NULL; | |
5f84b55d EL |
1258 | } |
1259 | } else { | |
1260 | #endif | |
69d0d484 | 1261 | if (ptv->ring.v2) { |
5f84b55d | 1262 | /* only used in reading phase, we can free it */ |
69d0d484 VJ |
1263 | SCFree(ptv->ring.v2); |
1264 | ptv->ring.v2 = NULL; | |
5f84b55d EL |
1265 | } |
1266 | #ifdef HAVE_TPACKET_V3 | |
13f13b6d | 1267 | } |
5f84b55d | 1268 | #endif |
13f13b6d EL |
1269 | if (ptv->socket != -1) { |
1270 | /* we need to wait for all packets to return data */ | |
1271 | if (SC_ATOMIC_SUB(ptv->mpeer->sock_usage, 1) == 0) { | |
b86e1762 | 1272 | SCLogDebug("Cleaning socket connected to '%s'", ptv->iface); |
cba41207 | 1273 | munmap(ptv->ring_buf, ptv->ring_buflen); |
13f13b6d EL |
1274 | close(ptv->socket); |
1275 | ptv->socket = -1; | |
1276 | } | |
1277 | } | |
1278 | } | |
1279 | if (state == AFP_STATE_UP) { | |
1280 | (void)SC_ATOMIC_SET(ptv->mpeer->sock_usage, 1); | |
1281 | } | |
1282 | } | |
49b7b00f | 1283 | |
7fea0ec6 EL |
1284 | static int AFPReadAndDiscard(AFPThreadVars *ptv, struct timeval *synctv, |
1285 | uint64_t *discarded_pkts) | |
919377d4 EL |
1286 | { |
1287 | struct sockaddr_ll from; | |
1288 | struct iovec iov; | |
1289 | struct msghdr msg; | |
1290 | struct timeval ts; | |
1291 | union { | |
1292 | struct cmsghdr cmsg; | |
1293 | char buf[CMSG_SPACE(sizeof(struct tpacket_auxdata))]; | |
1294 | } cmsg_buf; | |
1295 | ||
1296 | ||
1297 | if (unlikely(suricata_ctl_flags != 0)) { | |
1298 | return 1; | |
1299 | } | |
1300 | ||
1301 | msg.msg_name = &from; | |
1302 | msg.msg_namelen = sizeof(from); | |
1303 | msg.msg_iov = &iov; | |
1304 | msg.msg_iovlen = 1; | |
1305 | msg.msg_control = &cmsg_buf; | |
1306 | msg.msg_controllen = sizeof(cmsg_buf); | |
1307 | msg.msg_flags = 0; | |
1308 | ||
1309 | iov.iov_len = ptv->datalen; | |
1310 | iov.iov_base = ptv->data; | |
1311 | ||
339f0665 | 1312 | (void)recvmsg(ptv->socket, &msg, MSG_TRUNC); |
919377d4 EL |
1313 | |
1314 | if (ioctl(ptv->socket, SIOCGSTAMP, &ts) == -1) { | |
1315 | /* FIXME */ | |
1316 | return -1; | |
1317 | } | |
1318 | ||
1319 | if ((ts.tv_sec > synctv->tv_sec) || | |
1320 | (ts.tv_sec >= synctv->tv_sec && | |
1321 | ts.tv_usec > synctv->tv_usec)) { | |
1322 | return 1; | |
1323 | } | |
1324 | return 0; | |
1325 | } | |
1326 | ||
7fea0ec6 EL |
1327 | static int AFPReadAndDiscardFromRing(AFPThreadVars *ptv, struct timeval *synctv, |
1328 | uint64_t *discarded_pkts) | |
919377d4 EL |
1329 | { |
1330 | union thdr h; | |
1331 | ||
1332 | if (unlikely(suricata_ctl_flags != 0)) { | |
1333 | return 1; | |
1334 | } | |
1335 | ||
f947539d | 1336 | #ifdef HAVE_TPACKET_V3 |
bae1b03c | 1337 | if (ptv->flags & AFP_TPACKET_V3) { |
cebbe06f | 1338 | int ret = 0; |
7fea0ec6 | 1339 | struct tpacket_block_desc *pbd; |
69d0d484 | 1340 | pbd = (struct tpacket_block_desc *) ptv->ring.v3[ptv->frame_offset].iov_base; |
7fea0ec6 | 1341 | *discarded_pkts += pbd->hdr.bh1.num_pkts; |
cebbe06f VJ |
1342 | struct tpacket3_hdr *ppd = |
1343 | (struct tpacket3_hdr *)((uint8_t *)pbd + pbd->hdr.bh1.offset_to_first_pkt); | |
1344 | if (((time_t)ppd->tp_sec > synctv->tv_sec) || | |
1345 | ((time_t)ppd->tp_sec == synctv->tv_sec && | |
1346 | (suseconds_t) (ppd->tp_nsec / 1000) > (suseconds_t)synctv->tv_usec)) { | |
1347 | ret = 1; | |
1348 | } | |
7fea0ec6 | 1349 | AFPFlushBlock(pbd); |
69d0d484 | 1350 | ptv->frame_offset = (ptv->frame_offset + 1) % ptv->req.v3.tp_block_nr; |
cebbe06f | 1351 | return ret; |
f947539d VJ |
1352 | |
1353 | } else | |
1354 | #endif | |
1355 | { | |
7fea0ec6 | 1356 | /* Read packet from ring */ |
69d0d484 | 1357 | h.raw = (((union thdr **)ptv->ring.v2)[ptv->frame_offset]); |
7fea0ec6 EL |
1358 | if (h.raw == NULL) { |
1359 | return -1; | |
1360 | } | |
1361 | (*discarded_pkts)++; | |
1362 | if (((time_t)h.h2->tp_sec > synctv->tv_sec) || | |
1363 | ((time_t)h.h2->tp_sec == synctv->tv_sec && | |
1364 | (suseconds_t) (h.h2->tp_nsec / 1000) > synctv->tv_usec)) { | |
1365 | return 1; | |
1366 | } | |
919377d4 | 1367 | |
7fea0ec6 | 1368 | h.h2->tp_status = TP_STATUS_KERNEL; |
69d0d484 | 1369 | if (++ptv->frame_offset >= ptv->req.v2.tp_frame_nr) { |
7fea0ec6 EL |
1370 | ptv->frame_offset = 0; |
1371 | } | |
919377d4 EL |
1372 | } |
1373 | ||
1374 | ||
1375 | return 0; | |
1376 | } | |
1377 | ||
806844d8 VJ |
1378 | /** \brief wait for all afpacket threads to fully init |
1379 | * | |
1380 | * Discard packets before all threads are ready, as the cluster | |
1381 | * setup is not complete yet. | |
1382 | * | |
1383 | * if AFPPeersListStarted() returns true init is complete | |
1384 | * | |
1385 | * \retval r 1 = happy, otherwise unhappy | |
1386 | */ | |
7fea0ec6 | 1387 | static int AFPSynchronizeStart(AFPThreadVars *ptv, uint64_t *discarded_pkts) |
919377d4 | 1388 | { |
919377d4 | 1389 | struct timeval synctv; |
806844d8 VJ |
1390 | struct pollfd fds; |
1391 | ||
1392 | fds.fd = ptv->socket; | |
1393 | fds.events = POLLIN; | |
919377d4 EL |
1394 | |
1395 | /* Set timeval to end of the world */ | |
1396 | synctv.tv_sec = 0xffffffff; | |
1397 | synctv.tv_usec = 0xffffffff; | |
1398 | ||
1399 | while (1) { | |
8709a20d | 1400 | int r = poll(&fds, 1, POLL_TIMEOUT); |
806844d8 VJ |
1401 | if (r > 0 && |
1402 | (fds.revents & (POLLHUP|POLLRDHUP|POLLERR|POLLNVAL))) { | |
1403 | SCLogWarning(SC_ERR_AFP_READ, "poll failed %02x", | |
1404 | fds.revents & (POLLHUP|POLLRDHUP|POLLERR|POLLNVAL)); | |
1405 | return 0; | |
1406 | } else if (r > 0) { | |
1407 | if (AFPPeersListStarted() && synctv.tv_sec == (time_t) 0xffffffff) { | |
1408 | gettimeofday(&synctv, NULL); | |
1409 | } | |
1410 | if (ptv->flags & AFP_RING_MODE) { | |
7fea0ec6 | 1411 | r = AFPReadAndDiscardFromRing(ptv, &synctv, discarded_pkts); |
806844d8 | 1412 | } else { |
7fea0ec6 | 1413 | r = AFPReadAndDiscard(ptv, &synctv, discarded_pkts); |
806844d8 VJ |
1414 | } |
1415 | SCLogDebug("Discarding on %s", ptv->tv->name); | |
1416 | switch (r) { | |
1417 | case 1: | |
9f7ba071 | 1418 | SCLogDebug("Starting to read on %s", ptv->tv->name); |
806844d8 VJ |
1419 | return 1; |
1420 | case -1: | |
1421 | return r; | |
1422 | } | |
1423 | /* no packets */ | |
1424 | } else if (r == 0 && AFPPeersListStarted()) { | |
86a3f064 | 1425 | SCLogDebug("Starting to read on %s", ptv->tv->name); |
806844d8 | 1426 | return 1; |
43b6cbd4 | 1427 | } else if (r < 0) { /* only exit on error */ |
806844d8 VJ |
1428 | SCLogWarning(SC_ERR_AFP_READ, "poll failed with retval %d", r); |
1429 | return 0; | |
919377d4 EL |
1430 | } |
1431 | } | |
1432 | return 1; | |
1433 | } | |
1434 | ||
13f13b6d EL |
1435 | /** |
1436 | * \brief Try to reopen socket | |
1437 | * | |
1438 | * \retval 0 in case of success, negative if error occurs or a condition | |
1439 | * is not met. | |
1440 | */ | |
c45d8985 EL |
1441 | static int AFPTryReopen(AFPThreadVars *ptv) |
1442 | { | |
13f13b6d EL |
1443 | ptv->down_count++; |
1444 | ||
13f13b6d EL |
1445 | /* Don't reconnect till we have packet that did not release data */ |
1446 | if (SC_ATOMIC_GET(ptv->mpeer->sock_usage) != 0) { | |
1447 | return -1; | |
1448 | } | |
c45d8985 | 1449 | |
8709a20d | 1450 | int afp_activate_r = AFPCreateSocket(ptv, ptv->iface, 0); |
c45d8985 | 1451 | if (afp_activate_r != 0) { |
13f13b6d EL |
1452 | if (ptv->down_count % AFP_DOWN_COUNTER_INTERVAL == 0) { |
1453 | SCLogWarning(SC_ERR_AFP_CREATE, "Can not open iface '%s'", | |
1454 | ptv->iface); | |
1455 | } | |
c45d8985 EL |
1456 | return afp_activate_r; |
1457 | } | |
1458 | ||
3bea3b39 | 1459 | SCLogInfo("Interface '%s' is back", ptv->iface); |
c45d8985 EL |
1460 | return 0; |
1461 | } | |
1462 | ||
e80b30c0 EL |
1463 | /** |
1464 | * \brief Main AF_PACKET reading Loop function | |
1465 | */ | |
1466 | TmEcode ReceiveAFPLoop(ThreadVars *tv, void *data, void *slot) | |
1467 | { | |
34581ce9 AS |
1468 | SCEnter(); |
1469 | ||
e80b30c0 | 1470 | AFPThreadVars *ptv = (AFPThreadVars *)data; |
e80b30c0 EL |
1471 | struct pollfd fds; |
1472 | int r; | |
34581ce9 | 1473 | TmSlot *s = (TmSlot *)slot; |
e8a4a4c4 | 1474 | time_t last_dump = 0; |
49612128 | 1475 | time_t current_time; |
5f400785 | 1476 | int (*AFPReadFunc) (AFPThreadVars *); |
7fea0ec6 | 1477 | uint64_t discarded_pkts = 0; |
e80b30c0 | 1478 | |
34581ce9 | 1479 | ptv->slot = s->slot_next; |
e80b30c0 | 1480 | |
5f400785 | 1481 | if (ptv->flags & AFP_RING_MODE) { |
bae1b03c EL |
1482 | if (ptv->flags & AFP_TPACKET_V3) { |
1483 | AFPReadFunc = AFPReadFromRingV3; | |
1484 | } else { | |
1485 | AFPReadFunc = AFPReadFromRing; | |
1486 | } | |
5f400785 EL |
1487 | } else { |
1488 | AFPReadFunc = AFPRead; | |
1489 | } | |
1490 | ||
60400163 EL |
1491 | if (ptv->afp_state == AFP_STATE_DOWN) { |
1492 | /* Wait for our turn, threads before us must have opened the socket */ | |
1493 | while (AFPPeersListWaitTurn(ptv->mpeer)) { | |
1494 | usleep(1000); | |
1992a227 EL |
1495 | if (suricata_ctl_flags != 0) { |
1496 | break; | |
1497 | } | |
60400163 EL |
1498 | } |
1499 | r = AFPCreateSocket(ptv, ptv->iface, 1); | |
1500 | if (r < 0) { | |
1992a227 EL |
1501 | switch (-r) { |
1502 | case AFP_FATAL_ERROR: | |
1503 | SCLogError(SC_ERR_AFP_CREATE, "Couldn't init AF_PACKET socket, fatal error"); | |
1992a227 EL |
1504 | SCReturnInt(TM_ECODE_FAILED); |
1505 | case AFP_RECOVERABLE_ERROR: | |
1506 | SCLogWarning(SC_ERR_AFP_CREATE, "Couldn't init AF_PACKET socket, retrying soon"); | |
1507 | } | |
60400163 EL |
1508 | } |
1509 | AFPPeersListReachedInc(); | |
1510 | } | |
1511 | if (ptv->afp_state == AFP_STATE_UP) { | |
86a3f064 | 1512 | SCLogDebug("Thread %s using socket %d", tv->name, ptv->socket); |
c99dc5a7 | 1513 | AFPSynchronizeStart(ptv, &discarded_pkts); |
7fea0ec6 EL |
1514 | /* let's reset counter as we will start the capture at the |
1515 | * next function call */ | |
1516 | #ifdef PACKET_STATISTICS | |
1517 | struct tpacket_stats kstats; | |
1518 | socklen_t len = sizeof (struct tpacket_stats); | |
1519 | if (getsockopt(ptv->socket, SOL_PACKET, PACKET_STATISTICS, | |
1520 | &kstats, &len) > -1) { | |
1521 | uint64_t pkts = 0; | |
1522 | SCLogDebug("(%s) Kernel socket startup: Packets %" PRIu32 | |
1523 | ", dropped %" PRIu32 "", | |
1524 | ptv->tv->name, | |
1525 | kstats.tp_packets, kstats.tp_drops); | |
1526 | pkts = kstats.tp_packets - discarded_pkts - kstats.tp_drops; | |
1527 | StatsAddUI64(ptv->tv, ptv->capture_kernel_packets, pkts); | |
1528 | (void) SC_ATOMIC_ADD(ptv->livedev->pkts, pkts); | |
1529 | } | |
1530 | #endif | |
60400163 EL |
1531 | } |
1532 | ||
e80b30c0 EL |
1533 | fds.fd = ptv->socket; |
1534 | fds.events = POLLIN; | |
1535 | ||
1536 | while (1) { | |
1537 | /* Start by checking the state of our interface */ | |
1538 | if (unlikely(ptv->afp_state == AFP_STATE_DOWN)) { | |
1539 | int dbreak = 0; | |
662dccd8 | 1540 | |
e80b30c0 EL |
1541 | do { |
1542 | usleep(AFP_RECONNECT_TIMEOUT); | |
1543 | if (suricata_ctl_flags != 0) { | |
1544 | dbreak = 1; | |
1545 | break; | |
1546 | } | |
1547 | r = AFPTryReopen(ptv); | |
09e709d1 | 1548 | fds.fd = ptv->socket; |
e80b30c0 EL |
1549 | } while (r < 0); |
1550 | if (dbreak == 1) | |
1551 | break; | |
1552 | } | |
1553 | ||
1554 | /* make sure we have at least one packet in the packet pool, to prevent | |
1555 | * us from alloc'ing packets at line rate */ | |
3c6e01f6 | 1556 | PacketPoolWait(); |
e80b30c0 EL |
1557 | |
1558 | r = poll(&fds, 1, POLL_TIMEOUT); | |
1559 | ||
1560 | if (suricata_ctl_flags != 0) { | |
1561 | break; | |
1562 | } | |
1563 | ||
1564 | if (r > 0 && | |
1565 | (fds.revents & (POLLHUP|POLLRDHUP|POLLERR|POLLNVAL))) { | |
1566 | if (fds.revents & (POLLHUP | POLLRDHUP)) { | |
13f13b6d | 1567 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 | 1568 | continue; |
ff6365dd | 1569 | } else if (fds.revents & POLLERR) { |
e80b30c0 EL |
1570 | char c; |
1571 | /* Do a recv to get errno */ | |
1572 | if (recv(ptv->socket, &c, sizeof c, MSG_PEEK) != -1) | |
1573 | continue; /* what, no error? */ | |
3bea3b39 | 1574 | SCLogError(SC_ERR_AFP_READ, |
efbb5ce0 | 1575 | "Error reading data from iface '%s': (%d) %s", |
3bea3b39 | 1576 | ptv->iface, errno, strerror(errno)); |
13f13b6d | 1577 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 | 1578 | continue; |
ff6365dd | 1579 | } else if (fds.revents & POLLNVAL) { |
e80b30c0 | 1580 | SCLogError(SC_ERR_AFP_READ, "Invalid polling request"); |
13f13b6d | 1581 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 EL |
1582 | continue; |
1583 | } | |
1584 | } else if (r > 0) { | |
5f400785 | 1585 | r = AFPReadFunc(ptv); |
62e63e3f | 1586 | switch (r) { |
27adbfa8 EL |
1587 | case AFP_READ_OK: |
1588 | /* Trigger one dump of stats every second */ | |
49612128 EL |
1589 | current_time = time(NULL); |
1590 | if (current_time != last_dump) { | |
27adbfa8 | 1591 | AFPDumpCounters(ptv); |
49612128 | 1592 | last_dump = current_time; |
27adbfa8 EL |
1593 | } |
1594 | break; | |
62e63e3f EL |
1595 | case AFP_READ_FAILURE: |
1596 | /* AFPRead in error: best to reset the socket */ | |
3bea3b39 | 1597 | SCLogError(SC_ERR_AFP_READ, |
efbb5ce0 | 1598 | "AFPRead error reading data from iface '%s': (%d) %s", |
3bea3b39 | 1599 | ptv->iface, errno, strerror(errno)); |
13f13b6d | 1600 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
62e63e3f | 1601 | continue; |
9efa4ace EL |
1602 | case AFP_SURI_FAILURE: |
1603 | StatsIncr(ptv->tv, ptv->capture_errors); | |
62e63e3f | 1604 | break; |
27b5136b | 1605 | case AFP_KERNEL_DROP: |
e8a4a4c4 | 1606 | AFPDumpCounters(ptv); |
27b5136b | 1607 | break; |
e80b30c0 | 1608 | } |
11099cfa | 1609 | } else if (unlikely(r == 0)) { |
f53e687b EL |
1610 | /* Trigger one dump of stats every second */ |
1611 | current_time = time(NULL); | |
1612 | if (current_time != last_dump) { | |
1613 | AFPDumpCounters(ptv); | |
1614 | last_dump = current_time; | |
1615 | } | |
ce71bf1f | 1616 | /* poll timed out, lets see handle our timeout path */ |
49599dfe | 1617 | TmThreadsCaptureHandleTimeout(tv, NULL); |
11099cfa | 1618 | |
e80b30c0 | 1619 | } else if ((r < 0) && (errno != EINTR)) { |
efbb5ce0 | 1620 | SCLogError(SC_ERR_AFP_READ, "Error reading data from iface '%s': (%d) %s", |
3bea3b39 | 1621 | ptv->iface, |
e80b30c0 | 1622 | errno, strerror(errno)); |
13f13b6d | 1623 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
e80b30c0 EL |
1624 | continue; |
1625 | } | |
752f03e7 | 1626 | StatsSyncCountersIfSignalled(tv); |
e80b30c0 EL |
1627 | } |
1628 | ||
4e561d6b | 1629 | AFPDumpCounters(ptv); |
752f03e7 | 1630 | StatsSyncCountersIfSignalled(tv); |
e80b30c0 EL |
1631 | SCReturnInt(TM_ECODE_OK); |
1632 | } | |
1633 | ||
13f13b6d EL |
1634 | static int AFPGetDevFlags(int fd, const char *ifname) |
1635 | { | |
1636 | struct ifreq ifr; | |
1637 | ||
1638 | memset(&ifr, 0, sizeof(ifr)); | |
1639 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); | |
1640 | ||
1641 | if (ioctl(fd, SIOCGIFFLAGS, &ifr) == -1) { | |
1642 | SCLogError(SC_ERR_AFP_CREATE, "Unable to find type for iface \"%s\": %s", | |
1643 | ifname, strerror(errno)); | |
1644 | return -1; | |
1645 | } | |
1646 | ||
1647 | return ifr.ifr_flags; | |
1648 | } | |
1649 | ||
1650 | ||
e80b30c0 | 1651 | static int AFPGetIfnumByDev(int fd, const char *ifname, int verbose) |
c45d8985 EL |
1652 | { |
1653 | struct ifreq ifr; | |
1654 | ||
1655 | memset(&ifr, 0, sizeof(ifr)); | |
e80b30c0 | 1656 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
c45d8985 EL |
1657 | |
1658 | if (ioctl(fd, SIOCGIFINDEX, &ifr) == -1) { | |
cba41207 AG |
1659 | if (verbose) |
1660 | SCLogError(SC_ERR_AFP_CREATE, "Unable to find iface %s: %s", | |
1661 | ifname, strerror(errno)); | |
c45d8985 EL |
1662 | return -1; |
1663 | } | |
1664 | ||
1665 | return ifr.ifr_ifindex; | |
1666 | } | |
1667 | ||
e80b30c0 | 1668 | static int AFPGetDevLinktype(int fd, const char *ifname) |
c45d8985 EL |
1669 | { |
1670 | struct ifreq ifr; | |
1671 | ||
1672 | memset(&ifr, 0, sizeof(ifr)); | |
e80b30c0 | 1673 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
c45d8985 EL |
1674 | |
1675 | if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1) { | |
1676 | SCLogError(SC_ERR_AFP_CREATE, "Unable to find type for iface \"%s\": %s", | |
1677 | ifname, strerror(errno)); | |
1678 | return -1; | |
1679 | } | |
1680 | ||
e80b30c0 EL |
1681 | switch (ifr.ifr_hwaddr.sa_family) { |
1682 | case ARPHRD_LOOPBACK: | |
1683 | return LINKTYPE_ETHERNET; | |
1684 | case ARPHRD_PPP: | |
11eb1d7c | 1685 | case ARPHRD_NONE: |
e80b30c0 EL |
1686 | return LINKTYPE_RAW; |
1687 | default: | |
1688 | return ifr.ifr_hwaddr.sa_family; | |
1689 | } | |
c45d8985 EL |
1690 | } |
1691 | ||
b7bf299e EL |
1692 | int AFPGetLinkType(const char *ifname) |
1693 | { | |
1694 | int ltype; | |
1695 | ||
1696 | int fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); | |
1697 | if (fd == -1) { | |
1698 | SCLogError(SC_ERR_AFP_CREATE, "Couldn't create a AF_PACKET socket, error %s", strerror(errno)); | |
1699 | return LINKTYPE_RAW; | |
1700 | } | |
1701 | ||
1702 | ltype = AFPGetDevLinktype(fd, ifname); | |
1703 | close(fd); | |
1704 | ||
1705 | return ltype; | |
1706 | } | |
1707 | ||
49b7b00f EL |
1708 | static int AFPComputeRingParams(AFPThreadVars *ptv, int order) |
1709 | { | |
1710 | /* Compute structure: | |
1711 | Target is to store all pending packets | |
1712 | with a size equal to MTU + auxdata | |
1713 | And we keep a decent number of block | |
1714 | ||
1715 | To do so: | |
1716 | Compute frame_size (aligned to be able to fit in block | |
1717 | Check which block size we need. Blocksize is a 2^n * pagesize | |
1718 | We then need to get order, big enough to have | |
1719 | frame_size < block size | |
1720 | Find number of frame per block (divide) | |
1721 | Fill in packet_req | |
1722 | ||
1723 | Compute frame size: | |
1724 | described in packet_mmap.txt | |
1725 | dependant on snaplen (need to use a variable ?) | |
1726 | snaplen: MTU ? | |
1727 | tp_hdrlen determine_version in daq_afpacket | |
1728 | in V1: sizeof(struct tpacket_hdr); | |
1729 | in V2: val in getsockopt(instance->fd, SOL_PACKET, PACKET_HDRLEN, &val, &len) | |
1730 | frame size: TPACKET_ALIGN(snaplen + TPACKET_ALIGN(TPACKET_ALIGN(tp_hdrlen) + sizeof(struct sockaddr_ll) + ETH_HLEN) - ETH_HLEN); | |
1731 | ||
1732 | */ | |
1733 | int tp_hdrlen = sizeof(struct tpacket_hdr); | |
1734 | int snaplen = default_packet_size; | |
1735 | ||
03032457 EL |
1736 | if (snaplen == 0) { |
1737 | snaplen = GetIfaceMaxPacketSize(ptv->iface); | |
1738 | if (snaplen <= 0) { | |
1739 | SCLogWarning(SC_ERR_INVALID_VALUE, | |
1740 | "Unable to get MTU, setting snaplen to sane default of 1514"); | |
1741 | snaplen = 1514; | |
1742 | } | |
1743 | } | |
1744 | ||
69d0d484 VJ |
1745 | ptv->req.v2.tp_frame_size = TPACKET_ALIGN(snaplen +TPACKET_ALIGN(TPACKET_ALIGN(tp_hdrlen) + sizeof(struct sockaddr_ll) + ETH_HLEN) - ETH_HLEN); |
1746 | ptv->req.v2.tp_block_size = getpagesize() << order; | |
1747 | int frames_per_block = ptv->req.v2.tp_block_size / ptv->req.v2.tp_frame_size; | |
49b7b00f | 1748 | if (frames_per_block == 0) { |
bae1b03c | 1749 | SCLogError(SC_ERR_INVALID_VALUE, "Frame size bigger than block size"); |
49b7b00f EL |
1750 | return -1; |
1751 | } | |
69d0d484 VJ |
1752 | ptv->req.v2.tp_frame_nr = ptv->ring_size; |
1753 | ptv->req.v2.tp_block_nr = ptv->req.v2.tp_frame_nr / frames_per_block + 1; | |
49b7b00f | 1754 | /* exact division */ |
69d0d484 | 1755 | ptv->req.v2.tp_frame_nr = ptv->req.v2.tp_block_nr * frames_per_block; |
b3bf7a57 | 1756 | SCLogPerf("AF_PACKET RX Ring params: block_size=%d block_nr=%d frame_size=%d frame_nr=%d", |
69d0d484 VJ |
1757 | ptv->req.v2.tp_block_size, ptv->req.v2.tp_block_nr, |
1758 | ptv->req.v2.tp_frame_size, ptv->req.v2.tp_frame_nr); | |
49b7b00f EL |
1759 | return 1; |
1760 | } | |
1761 | ||
c2d0d938 | 1762 | #ifdef HAVE_TPACKET_V3 |
bae1b03c EL |
1763 | static int AFPComputeRingParamsV3(AFPThreadVars *ptv) |
1764 | { | |
69d0d484 VJ |
1765 | ptv->req.v3.tp_block_size = ptv->block_size; |
1766 | ptv->req.v3.tp_frame_size = 2048; | |
bae1b03c EL |
1767 | int frames_per_block = 0; |
1768 | int tp_hdrlen = sizeof(struct tpacket3_hdr); | |
1769 | int snaplen = default_packet_size; | |
1770 | ||
1771 | if (snaplen == 0) { | |
1772 | snaplen = GetIfaceMaxPacketSize(ptv->iface); | |
1773 | if (snaplen <= 0) { | |
1774 | SCLogWarning(SC_ERR_INVALID_VALUE, | |
1775 | "Unable to get MTU, setting snaplen to sane default of 1514"); | |
1776 | snaplen = 1514; | |
1777 | } | |
1778 | } | |
1779 | ||
69d0d484 VJ |
1780 | ptv->req.v3.tp_frame_size = TPACKET_ALIGN(snaplen +TPACKET_ALIGN(TPACKET_ALIGN(tp_hdrlen) + sizeof(struct sockaddr_ll) + ETH_HLEN) - ETH_HLEN); |
1781 | frames_per_block = ptv->req.v3.tp_block_size / ptv->req.v3.tp_frame_size; | |
bae1b03c EL |
1782 | |
1783 | if (frames_per_block == 0) { | |
1784 | SCLogError(SC_ERR_INVALID_VALUE, | |
1785 | "Block size is too small, it should be at least %d", | |
69d0d484 | 1786 | ptv->req.v3.tp_frame_size); |
bae1b03c EL |
1787 | return -1; |
1788 | } | |
69d0d484 | 1789 | ptv->req.v3.tp_block_nr = ptv->ring_size / frames_per_block + 1; |
bae1b03c | 1790 | /* exact division */ |
69d0d484 VJ |
1791 | ptv->req.v3.tp_frame_nr = ptv->req.v3.tp_block_nr * frames_per_block; |
1792 | ptv->req.v3.tp_retire_blk_tov = ptv->block_timeout; | |
1793 | ptv->req.v3.tp_feature_req_word = TP_FT_REQ_FILL_RXHASH; | |
b3bf7a57 | 1794 | SCLogPerf("AF_PACKET V3 RX Ring params: block_size=%d block_nr=%d frame_size=%d frame_nr=%d (mem: %d)", |
69d0d484 VJ |
1795 | ptv->req.v3.tp_block_size, ptv->req.v3.tp_block_nr, |
1796 | ptv->req.v3.tp_frame_size, ptv->req.v3.tp_frame_nr, | |
1797 | ptv->req.v3.tp_block_size * ptv->req.v3.tp_block_nr | |
bae1b03c EL |
1798 | ); |
1799 | return 1; | |
1800 | } | |
c2d0d938 | 1801 | #endif |
bae1b03c | 1802 | |
c7bde9df EL |
1803 | static int AFPSetupRing(AFPThreadVars *ptv, char *devname) |
1804 | { | |
1805 | int val; | |
1806 | unsigned int len = sizeof(val), i; | |
c7bde9df | 1807 | int order; |
f5c20191 | 1808 | int r, mmap_flag; |
c7bde9df | 1809 | |
c2d0d938 | 1810 | #ifdef HAVE_TPACKET_V3 |
c7bde9df EL |
1811 | if (ptv->flags & AFP_TPACKET_V3) { |
1812 | val = TPACKET_V3; | |
f947539d | 1813 | } else |
c2d0d938 | 1814 | #endif |
f947539d | 1815 | { |
c7bde9df EL |
1816 | val = TPACKET_V2; |
1817 | } | |
1818 | if (getsockopt(ptv->socket, SOL_PACKET, PACKET_HDRLEN, &val, &len) < 0) { | |
1819 | if (errno == ENOPROTOOPT) { | |
1820 | if (ptv->flags & AFP_TPACKET_V3) { | |
1821 | SCLogError(SC_ERR_AFP_CREATE, | |
1822 | "Too old kernel giving up (need 3.2 for TPACKET_V3)"); | |
1823 | } else { | |
1824 | SCLogError(SC_ERR_AFP_CREATE, | |
1825 | "Too old kernel giving up (need 2.6.27 at least)"); | |
1826 | } | |
1827 | } | |
1828 | SCLogError(SC_ERR_AFP_CREATE, "Error when retrieving packet header len"); | |
1829 | return AFP_FATAL_ERROR; | |
1830 | } | |
1831 | ||
f947539d VJ |
1832 | val = TPACKET_V2; |
1833 | #ifdef HAVE_TPACKET_V3 | |
c7bde9df EL |
1834 | if (ptv->flags & AFP_TPACKET_V3) { |
1835 | val = TPACKET_V3; | |
c7bde9df | 1836 | } |
f947539d | 1837 | #endif |
c7bde9df EL |
1838 | if (setsockopt(ptv->socket, SOL_PACKET, PACKET_VERSION, &val, |
1839 | sizeof(val)) < 0) { | |
1840 | SCLogError(SC_ERR_AFP_CREATE, | |
1841 | "Can't activate TPACKET_V2/TPACKET_V3 on packet socket: %s", | |
1842 | strerror(errno)); | |
1843 | return AFP_FATAL_ERROR; | |
1844 | } | |
1845 | ||
a40f08a2 EL |
1846 | #ifdef HAVE_HW_TIMESTAMPING |
1847 | int req = SOF_TIMESTAMPING_RAW_HARDWARE; | |
1848 | if (setsockopt(ptv->socket, SOL_PACKET, PACKET_TIMESTAMP, (void *) &req, | |
1849 | sizeof(req)) < 0) { | |
1850 | SCLogWarning(SC_ERR_AFP_CREATE, | |
1851 | "Can't activate hardware timestamping on packet socket: %s", | |
1852 | strerror(errno)); | |
1853 | } | |
1854 | #endif | |
1855 | ||
ecf59be4 EL |
1856 | /* Let's reserve head room so we can add the VLAN header in IPS |
1857 | * or TAP mode before write the packet */ | |
1858 | if (ptv->copy_mode != AFP_COPY_MODE_NONE) { | |
1859 | /* Only one vlan is extracted from AFP header so | |
1860 | * one VLAN header length is enough. */ | |
1861 | int reserve = VLAN_HEADER_LEN; | |
1862 | if (setsockopt(ptv->socket, SOL_PACKET, PACKET_RESERVE, (void *) &reserve, | |
1863 | sizeof(reserve)) < 0) { | |
1864 | SCLogError(SC_ERR_AFP_CREATE, | |
1865 | "Can't activate reserve on packet socket: %s", | |
1866 | strerror(errno)); | |
1867 | return AFP_FATAL_ERROR; | |
1868 | } | |
1869 | } | |
1870 | ||
c7bde9df | 1871 | /* Allocate RX ring */ |
c2d0d938 | 1872 | #ifdef HAVE_TPACKET_V3 |
c7bde9df EL |
1873 | if (ptv->flags & AFP_TPACKET_V3) { |
1874 | if (AFPComputeRingParamsV3(ptv) != 1) { | |
1875 | return AFP_FATAL_ERROR; | |
1876 | } | |
1877 | r = setsockopt(ptv->socket, SOL_PACKET, PACKET_RX_RING, | |
69d0d484 | 1878 | (void *) &ptv->req.v3, sizeof(ptv->req.v3)); |
c7bde9df EL |
1879 | if (r < 0) { |
1880 | SCLogError(SC_ERR_MEM_ALLOC, | |
1881 | "Unable to allocate RX Ring for iface %s: (%d) %s", | |
1882 | devname, | |
1883 | errno, | |
1884 | strerror(errno)); | |
1885 | return AFP_FATAL_ERROR; | |
1886 | } | |
1887 | } else { | |
c2d0d938 | 1888 | #endif |
fa902abe | 1889 | for (order = AFP_BLOCK_SIZE_DEFAULT_ORDER; order >= 0; order--) { |
c7bde9df EL |
1890 | if (AFPComputeRingParams(ptv, order) != 1) { |
1891 | SCLogInfo("Ring parameter are incorrect. Please correct the devel"); | |
1892 | return AFP_FATAL_ERROR; | |
1893 | } | |
1894 | ||
1895 | r = setsockopt(ptv->socket, SOL_PACKET, PACKET_RX_RING, | |
1896 | (void *) &ptv->req, sizeof(ptv->req)); | |
1897 | ||
1898 | if (r < 0) { | |
1899 | if (errno == ENOMEM) { | |
1900 | SCLogInfo("Memory issue with ring parameters. Retrying."); | |
1901 | continue; | |
1902 | } | |
1903 | SCLogError(SC_ERR_MEM_ALLOC, | |
1904 | "Unable to allocate RX Ring for iface %s: (%d) %s", | |
1905 | devname, | |
1906 | errno, | |
1907 | strerror(errno)); | |
1908 | return AFP_FATAL_ERROR; | |
1909 | } else { | |
1910 | break; | |
1911 | } | |
1912 | } | |
1913 | if (order < 0) { | |
1914 | SCLogError(SC_ERR_MEM_ALLOC, | |
1915 | "Unable to allocate RX Ring for iface %s (order 0 failed)", | |
1916 | devname); | |
1917 | return AFP_FATAL_ERROR; | |
1918 | } | |
c2d0d938 | 1919 | #ifdef HAVE_TPACKET_V3 |
c7bde9df | 1920 | } |
c2d0d938 | 1921 | #endif |
c7bde9df EL |
1922 | |
1923 | /* Allocate the Ring */ | |
c2d0d938 | 1924 | #ifdef HAVE_TPACKET_V3 |
c7bde9df | 1925 | if (ptv->flags & AFP_TPACKET_V3) { |
69d0d484 | 1926 | ptv->ring_buflen = ptv->req.v3.tp_block_nr * ptv->req.v3.tp_block_size; |
c7bde9df | 1927 | } else { |
c2d0d938 | 1928 | #endif |
69d0d484 | 1929 | ptv->ring_buflen = ptv->req.v2.tp_block_nr * ptv->req.v2.tp_block_size; |
c2d0d938 | 1930 | #ifdef HAVE_TPACKET_V3 |
c7bde9df | 1931 | } |
c2d0d938 | 1932 | #endif |
f5c20191 EL |
1933 | mmap_flag = MAP_SHARED; |
1934 | if (ptv->flags & AFP_MMAP_LOCKED) | |
1935 | mmap_flag |= MAP_LOCKED; | |
cba41207 | 1936 | ptv->ring_buf = mmap(0, ptv->ring_buflen, PROT_READ|PROT_WRITE, |
f5c20191 | 1937 | mmap_flag, ptv->socket, 0); |
cba41207 | 1938 | if (ptv->ring_buf == MAP_FAILED) { |
88f5d7d1 EL |
1939 | SCLogError(SC_ERR_MEM_ALLOC, "Unable to mmap, error %s", |
1940 | strerror(errno)); | |
c7bde9df EL |
1941 | goto mmap_err; |
1942 | } | |
c2d0d938 | 1943 | #ifdef HAVE_TPACKET_V3 |
c7bde9df | 1944 | if (ptv->flags & AFP_TPACKET_V3) { |
69d0d484 VJ |
1945 | ptv->ring.v3 = SCMalloc(ptv->req.v3.tp_block_nr * sizeof(*ptv->ring.v3)); |
1946 | if (!ptv->ring.v3) { | |
1947 | SCLogError(SC_ERR_MEM_ALLOC, "Unable to malloc ptv ring.v3"); | |
291af719 | 1948 | goto postmmap_err; |
c7bde9df | 1949 | } |
69d0d484 VJ |
1950 | for (i = 0; i < ptv->req.v3.tp_block_nr; ++i) { |
1951 | ptv->ring.v3[i].iov_base = ptv->ring_buf + (i * ptv->req.v3.tp_block_size); | |
1952 | ptv->ring.v3[i].iov_len = ptv->req.v3.tp_block_size; | |
c7bde9df EL |
1953 | } |
1954 | } else { | |
c2d0d938 | 1955 | #endif |
c7bde9df | 1956 | /* allocate a ring for each frame header pointer*/ |
69d0d484 VJ |
1957 | ptv->ring.v2 = SCMalloc(ptv->req.v2.tp_frame_nr * sizeof (union thdr *)); |
1958 | if (ptv->ring.v2 == NULL) { | |
c7bde9df | 1959 | SCLogError(SC_ERR_MEM_ALLOC, "Unable to allocate frame buf"); |
291af719 | 1960 | goto postmmap_err; |
c7bde9df | 1961 | } |
69d0d484 | 1962 | memset(ptv->ring.v2, 0, ptv->req.v2.tp_frame_nr * sizeof (union thdr *)); |
c7bde9df EL |
1963 | /* fill the header ring with proper frame ptr*/ |
1964 | ptv->frame_offset = 0; | |
69d0d484 VJ |
1965 | for (i = 0; i < ptv->req.v2.tp_block_nr; ++i) { |
1966 | void *base = &(ptv->ring_buf[i * ptv->req.v2.tp_block_size]); | |
c7bde9df | 1967 | unsigned int j; |
69d0d484 VJ |
1968 | for (j = 0; j < ptv->req.v2.tp_block_size / ptv->req.v2.tp_frame_size; ++j, ++ptv->frame_offset) { |
1969 | (((union thdr **)ptv->ring.v2)[ptv->frame_offset]) = base; | |
1970 | base += ptv->req.v2.tp_frame_size; | |
c7bde9df EL |
1971 | } |
1972 | } | |
1973 | ptv->frame_offset = 0; | |
c2d0d938 | 1974 | #ifdef HAVE_TPACKET_V3 |
c7bde9df | 1975 | } |
c2d0d938 | 1976 | #endif |
c7bde9df EL |
1977 | |
1978 | return 0; | |
1979 | ||
291af719 | 1980 | postmmap_err: |
cba41207 | 1981 | munmap(ptv->ring_buf, ptv->ring_buflen); |
69d0d484 VJ |
1982 | if (ptv->ring.v2) |
1983 | SCFree(ptv->ring.v2); | |
1984 | if (ptv->ring.v3) | |
1985 | SCFree(ptv->ring.v3); | |
c7bde9df EL |
1986 | mmap_err: |
1987 | /* Packet mmap does the cleaning when socket is closed */ | |
1988 | return AFP_FATAL_ERROR; | |
1989 | } | |
1990 | ||
402bdf9b VJ |
1991 | /** \brief test if we can use FANOUT. Older kernels like those in |
1992 | * CentOS6 have HAVE_PACKET_FANOUT defined but fail to work | |
1993 | */ | |
8940a9d3 | 1994 | int AFPIsFanoutSupported(int cluster_id) |
402bdf9b VJ |
1995 | { |
1996 | #ifdef HAVE_PACKET_FANOUT | |
1997 | int fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); | |
6227d095 VJ |
1998 | if (fd < 0) |
1999 | return 0; | |
402bdf9b | 2000 | |
6227d095 VJ |
2001 | uint16_t mode = PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG; |
2002 | uint16_t id = 1; | |
2003 | uint32_t option = (mode << 16) | (id & 0xffff); | |
2004 | int r = setsockopt(fd, SOL_PACKET, PACKET_FANOUT,(void *)&option, sizeof(option)); | |
2005 | close(fd); | |
2006 | ||
2007 | if (r < 0) { | |
8940a9d3 SB |
2008 | SCLogError(SC_ERR_INVALID_VALUE, "fanout not supported by kernel: " |
2009 | "Kernel too old or cluster-id %d already in use.", cluster_id); | |
6227d095 | 2010 | return 0; |
402bdf9b | 2011 | } |
6227d095 VJ |
2012 | return 1; |
2013 | #else | |
402bdf9b | 2014 | return 0; |
6227d095 | 2015 | #endif |
402bdf9b VJ |
2016 | } |
2017 | ||
91e1256b EL |
2018 | #ifdef HAVE_PACKET_EBPF |
2019 | ||
2020 | static int SockFanoutSeteBPF(AFPThreadVars *ptv) | |
2021 | { | |
2022 | int pfd = ptv->ebpf_lb_fd; | |
2023 | if (pfd == -1) { | |
2024 | SCLogError(SC_ERR_INVALID_VALUE, | |
2025 | "Fanout file descriptor is invalid"); | |
2026 | return -1; | |
2027 | } | |
2028 | ||
2029 | if (setsockopt(ptv->socket, SOL_PACKET, PACKET_FANOUT_DATA, &pfd, sizeof(pfd))) { | |
2030 | SCLogError(SC_ERR_INVALID_VALUE, "Error setting ebpf"); | |
2031 | return -1; | |
2032 | } | |
2033 | SCLogInfo("Activated eBPF on socket"); | |
2034 | ||
2035 | return 0; | |
2036 | } | |
2037 | ||
2038 | static int SetEbpfFilter(AFPThreadVars *ptv) | |
2039 | { | |
2040 | int pfd = ptv->ebpf_filter_fd; | |
2041 | if (pfd == -1) { | |
2042 | SCLogError(SC_ERR_INVALID_VALUE, | |
2043 | "Filter file descriptor is invalid"); | |
2044 | return -1; | |
2045 | } | |
2046 | ||
2047 | if (setsockopt(ptv->socket, SOL_SOCKET, SO_ATTACH_BPF, &pfd, sizeof(pfd))) { | |
2048 | SCLogError(SC_ERR_INVALID_VALUE, "Error setting ebpf: %s", strerror(errno)); | |
2049 | return -1; | |
2050 | } | |
2051 | SCLogInfo("Activated eBPF filter on socket"); | |
2052 | ||
2053 | return 0; | |
2054 | } | |
2055 | #endif | |
2056 | ||
e80b30c0 | 2057 | static int AFPCreateSocket(AFPThreadVars *ptv, char *devname, int verbose) |
c45d8985 EL |
2058 | { |
2059 | int r; | |
1992a227 | 2060 | int ret = AFP_FATAL_ERROR; |
c45d8985 EL |
2061 | struct packet_mreq sock_params; |
2062 | struct sockaddr_ll bind_address; | |
662dccd8 | 2063 | int if_idx; |
49b7b00f | 2064 | |
c45d8985 EL |
2065 | /* open socket */ |
2066 | ptv->socket = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); | |
2067 | if (ptv->socket == -1) { | |
e80b30c0 | 2068 | SCLogError(SC_ERR_AFP_CREATE, "Couldn't create a AF_PACKET socket, error %s", strerror(errno)); |
13f13b6d | 2069 | goto error; |
c45d8985 | 2070 | } |
cba41207 | 2071 | |
662dccd8 | 2072 | if_idx = AFPGetIfnumByDev(ptv->socket, devname, verbose); |
cba41207 AG |
2073 | |
2074 | if (if_idx == -1) { | |
fcd5e138 | 2075 | goto socket_err; |
cba41207 AG |
2076 | } |
2077 | ||
c45d8985 EL |
2078 | /* bind socket */ |
2079 | memset(&bind_address, 0, sizeof(bind_address)); | |
2080 | bind_address.sll_family = AF_PACKET; | |
2081 | bind_address.sll_protocol = htons(ETH_P_ALL); | |
662dccd8 | 2082 | bind_address.sll_ifindex = if_idx; |
c45d8985 EL |
2083 | if (bind_address.sll_ifindex == -1) { |
2084 | if (verbose) | |
e80b30c0 | 2085 | SCLogError(SC_ERR_AFP_CREATE, "Couldn't find iface %s", devname); |
1992a227 | 2086 | ret = AFP_RECOVERABLE_ERROR; |
13f13b6d EL |
2087 | goto socket_err; |
2088 | } | |
2089 | ||
cba41207 AG |
2090 | int if_flags = AFPGetDevFlags(ptv->socket, ptv->iface); |
2091 | if (if_flags == -1) { | |
2092 | if (verbose) { | |
2093 | SCLogError(SC_ERR_AFP_READ, | |
2094 | "Couldn't get flags for interface '%s'", | |
2095 | ptv->iface); | |
2096 | } | |
2097 | ret = AFP_RECOVERABLE_ERROR; | |
2098 | goto socket_err; | |
2099 | } else if ((if_flags & (IFF_UP | IFF_RUNNING)) == 0) { | |
2100 | if (verbose) { | |
2101 | SCLogError(SC_ERR_AFP_READ, | |
2102 | "Interface '%s' is down", | |
2103 | ptv->iface); | |
2104 | } | |
2105 | ret = AFP_RECOVERABLE_ERROR; | |
2106 | goto socket_err; | |
2107 | } | |
2108 | ||
13f13b6d EL |
2109 | if (ptv->promisc != 0) { |
2110 | /* Force promiscuous mode */ | |
2111 | memset(&sock_params, 0, sizeof(sock_params)); | |
2112 | sock_params.mr_type = PACKET_MR_PROMISC; | |
2113 | sock_params.mr_ifindex = bind_address.sll_ifindex; | |
2114 | r = setsockopt(ptv->socket, SOL_PACKET, PACKET_ADD_MEMBERSHIP,(void *)&sock_params, sizeof(sock_params)); | |
2115 | if (r < 0) { | |
2116 | SCLogError(SC_ERR_AFP_CREATE, | |
2117 | "Couldn't switch iface %s to promiscuous, error %s", | |
2118 | devname, strerror(errno)); | |
c7bde9df | 2119 | goto socket_err; |
13f13b6d EL |
2120 | } |
2121 | } | |
2122 | ||
2123 | if (ptv->checksum_mode == CHECKSUM_VALIDATION_KERNEL) { | |
2124 | int val = 1; | |
2125 | if (setsockopt(ptv->socket, SOL_PACKET, PACKET_AUXDATA, &val, | |
2126 | sizeof(val)) == -1 && errno != ENOPROTOOPT) { | |
2127 | SCLogWarning(SC_ERR_NO_AF_PACKET, | |
4111331a | 2128 | "'kernel' checksum mode not supported, falling back to full mode."); |
13f13b6d EL |
2129 | ptv->checksum_mode = CHECKSUM_VALIDATION_ENABLE; |
2130 | } | |
2131 | } | |
2132 | ||
2133 | /* set socket recv buffer size */ | |
2134 | if (ptv->buffer_size != 0) { | |
2135 | /* | |
2136 | * Set the socket buffer size to the specified value. | |
2137 | */ | |
b3bf7a57 | 2138 | SCLogPerf("Setting AF_PACKET socket buffer to %d", ptv->buffer_size); |
13f13b6d EL |
2139 | if (setsockopt(ptv->socket, SOL_SOCKET, SO_RCVBUF, |
2140 | &ptv->buffer_size, | |
2141 | sizeof(ptv->buffer_size)) == -1) { | |
2142 | SCLogError(SC_ERR_AFP_CREATE, | |
2143 | "Couldn't set buffer size to %d on iface %s, error %s", | |
2144 | ptv->buffer_size, devname, strerror(errno)); | |
c7bde9df | 2145 | goto socket_err; |
13f13b6d EL |
2146 | } |
2147 | } | |
2148 | ||
2149 | r = bind(ptv->socket, (struct sockaddr *)&bind_address, sizeof(bind_address)); | |
2150 | if (r < 0) { | |
2151 | if (verbose) { | |
2152 | if (errno == ENETDOWN) { | |
2153 | SCLogError(SC_ERR_AFP_CREATE, | |
2154 | "Couldn't bind AF_PACKET socket, iface %s is down", | |
2155 | devname); | |
2156 | } else { | |
2157 | SCLogError(SC_ERR_AFP_CREATE, | |
2158 | "Couldn't bind AF_PACKET socket to iface %s, error %s", | |
2159 | devname, strerror(errno)); | |
2160 | } | |
2161 | } | |
1992a227 | 2162 | ret = AFP_RECOVERABLE_ERROR; |
c7bde9df | 2163 | goto socket_err; |
13f13b6d EL |
2164 | } |
2165 | ||
91e1256b | 2166 | |
238ff231 EL |
2167 | #ifdef HAVE_PACKET_FANOUT |
2168 | /* add binded socket to fanout group */ | |
2169 | if (ptv->threads > 1) { | |
238ff231 EL |
2170 | uint16_t mode = ptv->cluster_type; |
2171 | uint16_t id = ptv->cluster_id; | |
4111331a | 2172 | uint32_t option = (mode << 16) | (id & 0xffff); |
238ff231 EL |
2173 | r = setsockopt(ptv->socket, SOL_PACKET, PACKET_FANOUT,(void *)&option, sizeof(option)); |
2174 | if (r < 0) { | |
2175 | SCLogError(SC_ERR_AFP_CREATE, | |
4111331a | 2176 | "Couldn't set fanout mode, error %s", |
238ff231 | 2177 | strerror(errno)); |
c7bde9df | 2178 | goto socket_err; |
238ff231 EL |
2179 | } |
2180 | } | |
2181 | #endif | |
2182 | ||
91e1256b EL |
2183 | #ifdef HAVE_PACKET_EBPF |
2184 | if (ptv->cluster_type == PACKET_FANOUT_EBPF) { | |
2185 | r = SockFanoutSeteBPF(ptv); | |
2186 | if (r < 0) { | |
2187 | SCLogError(SC_ERR_AFP_CREATE, | |
2188 | "Coudn't set EBPF, error %s", | |
2189 | strerror(errno)); | |
2190 | goto socket_err; | |
2191 | } | |
2192 | } | |
2193 | #endif | |
2194 | ||
49b7b00f | 2195 | if (ptv->flags & AFP_RING_MODE) { |
c7bde9df EL |
2196 | ret = AFPSetupRing(ptv, devname); |
2197 | if (ret != 0) | |
13f13b6d | 2198 | goto socket_err; |
49b7b00f EL |
2199 | } |
2200 | ||
86a3f064 | 2201 | SCLogDebug("Using interface '%s' via socket %d", (char *)devname, ptv->socket); |
c45d8985 | 2202 | |
c85ee1e3 EL |
2203 | ptv->datalink = AFPGetDevLinktype(ptv->socket, ptv->iface); |
2204 | switch (ptv->datalink) { | |
2205 | case ARPHRD_PPP: | |
2206 | case ARPHRD_ATM: | |
2207 | ptv->cooked = 1; | |
619414c5 | 2208 | break; |
c85ee1e3 EL |
2209 | } |
2210 | ||
f47df5a6 | 2211 | TmEcode rc = AFPSetBPFFilter(ptv); |
f2a6fb8a | 2212 | if (rc == TM_ECODE_FAILED) { |
39807b47 AG |
2213 | ret = AFP_FATAL_ERROR; |
2214 | goto socket_err; | |
f2a6fb8a EL |
2215 | } |
2216 | ||
49b7b00f | 2217 | /* Init is ok */ |
13f13b6d | 2218 | AFPSwitchState(ptv, AFP_STATE_UP); |
c45d8985 | 2219 | return 0; |
13f13b6d | 2220 | |
13f13b6d EL |
2221 | socket_err: |
2222 | close(ptv->socket); | |
2223 | ptv->socket = -1; | |
f47df5a6 | 2224 | if (ptv->flags & AFP_TPACKET_V3) { |
69d0d484 VJ |
2225 | if (ptv->ring.v3) { |
2226 | SCFree(ptv->ring.v3); | |
2227 | ptv->ring.v3 = NULL; | |
f47df5a6 VJ |
2228 | } |
2229 | } else { | |
69d0d484 VJ |
2230 | if (ptv->ring.v2) { |
2231 | SCFree(ptv->ring.v2); | |
2232 | ptv->ring.v2 = NULL; | |
f47df5a6 VJ |
2233 | } |
2234 | } | |
2235 | ||
13f13b6d | 2236 | error: |
1992a227 | 2237 | return -ret; |
c45d8985 EL |
2238 | } |
2239 | ||
f2a6fb8a EL |
2240 | TmEcode AFPSetBPFFilter(AFPThreadVars *ptv) |
2241 | { | |
2242 | struct bpf_program filter; | |
2243 | struct sock_fprog fcode; | |
2244 | int rc; | |
2245 | ||
91e1256b EL |
2246 | #ifdef HAVE_PACKET_EBPF |
2247 | if (ptv->ebpf_filter_fd != -1) { | |
2248 | return SetEbpfFilter(ptv); | |
2249 | } | |
2250 | #endif | |
2251 | ||
f2a6fb8a EL |
2252 | if (!ptv->bpf_filter) |
2253 | return TM_ECODE_OK; | |
2254 | ||
f2a6fb8a EL |
2255 | SCLogInfo("Using BPF '%s' on iface '%s'", |
2256 | ptv->bpf_filter, | |
2257 | ptv->iface); | |
28e9e4c8 EL |
2258 | |
2259 | char errbuf[PCAP_ERRBUF_SIZE]; | |
2260 | if (SCBPFCompile(default_packet_size, /* snaplen_arg */ | |
f2a6fb8a EL |
2261 | ptv->datalink, /* linktype_arg */ |
2262 | &filter, /* program */ | |
2263 | ptv->bpf_filter, /* const char *buf */ | |
cc82ef06 | 2264 | 1, /* optimize */ |
28e9e4c8 EL |
2265 | 0, /* mask */ |
2266 | errbuf, | |
2267 | sizeof(errbuf)) == -1) { | |
2268 | SCLogError(SC_ERR_AFP_CREATE, "Failed to compile BPF \"%s\": %s", | |
2269 | ptv->bpf_filter, | |
2270 | errbuf); | |
f2a6fb8a EL |
2271 | return TM_ECODE_FAILED; |
2272 | } | |
2273 | ||
2274 | fcode.len = filter.bf_len; | |
2275 | fcode.filter = (struct sock_filter*)filter.bf_insns; | |
2276 | ||
2277 | rc = setsockopt(ptv->socket, SOL_SOCKET, SO_ATTACH_FILTER, &fcode, sizeof(fcode)); | |
2278 | ||
28e9e4c8 | 2279 | SCBPFFree(&filter); |
f2a6fb8a EL |
2280 | if(rc == -1) { |
2281 | SCLogError(SC_ERR_AFP_CREATE, "Failed to attach filter: %s", strerror(errno)); | |
2282 | return TM_ECODE_FAILED; | |
2283 | } | |
2284 | ||
f2a6fb8a EL |
2285 | return TM_ECODE_OK; |
2286 | } | |
2287 | ||
06173267 EL |
2288 | #ifdef HAVE_PACKET_EBPF |
2289 | /** | |
2290 | * Insert a half flow in the kernel bypass table | |
2291 | * | |
2292 | * \param mapfd file descriptor of the protocol bypass table | |
2293 | * \param key data to use as key in the table | |
2598078e | 2294 | * \return 0 in case of error, 1 if success |
06173267 | 2295 | */ |
69d2c8eb | 2296 | static int AFPInsertHalfFlow(int mapd, void *key, unsigned int nr_cpus) |
06173267 | 2297 | { |
651a27e4 | 2298 | BPF_DECLARE_PERCPU(struct pair, value, nr_cpus); |
17a32bda | 2299 | unsigned int i; |
1e729f05 EL |
2300 | |
2301 | if (mapd == -1) { | |
2302 | return 0; | |
2303 | } | |
2304 | ||
94a622cb | 2305 | /* We use a per CPU structure so we have to set an array of values as the kernel |
6ab1cbcb EL |
2306 | * is not duplicating the data on each CPU by itself. */ |
2307 | for (i = 0; i < nr_cpus; i++) { | |
651a27e4 EL |
2308 | BPF_PERCPU(value, i).packets = 0; |
2309 | BPF_PERCPU(value, i).bytes = 0; | |
17a32bda | 2310 | } |
17a32bda EL |
2311 | if (bpf_map_update_elem(mapd, key, value, BPF_NOEXIST) != 0) { |
2312 | switch (errno) { | |
3379311e | 2313 | /* no more place in the hash */ |
17a32bda | 2314 | case E2BIG: |
17a32bda | 2315 | return 0; |
fcae1c18 EL |
2316 | /* no more place in the hash for some hardware bypass */ |
2317 | case EAGAIN: | |
2318 | return 0; | |
3379311e EL |
2319 | /* if we already have the key then bypass is a success */ |
2320 | case EEXIST: | |
2321 | return 1; | |
2322 | /* Not supposed to be there so issue a error */ | |
17a32bda EL |
2323 | default: |
2324 | SCLogError(SC_ERR_BPF, "Can't update eBPF map: %s (%d)", | |
2325 | strerror(errno), | |
2326 | errno); | |
2327 | return 0; | |
06173267 | 2328 | } |
17a32bda EL |
2329 | } |
2330 | return 1; | |
06173267 | 2331 | } |
b07bda7a | 2332 | |
9206b30f EL |
2333 | static int AFPSetFlowStorage(Packet *p, int map_fd, void *key0, void* key1, |
2334 | int family) | |
b07bda7a EL |
2335 | { |
2336 | FlowBypassInfo *fc = FlowGetStorageById(p->flow, GetFlowBypassInfoID()); | |
2337 | if (fc) { | |
2338 | EBPFBypassData *eb = SCCalloc(1, sizeof(EBPFBypassData)); | |
2339 | if (eb == NULL) { | |
9206b30f EL |
2340 | EBPFDeleteKey(map_fd, key0); |
2341 | EBPFDeleteKey(map_fd, key1); | |
2342 | LiveDevAddBypassFail(p->livedev, 1, family); | |
b07bda7a EL |
2343 | SCFree(key0); |
2344 | SCFree(key1); | |
2345 | return 0; | |
2346 | } | |
2347 | eb->key[0] = key0; | |
2348 | eb->key[1] = key1; | |
2349 | eb->mapfd = map_fd; | |
2350 | eb->cpus_count = p->afp_v.nr_cpus; | |
2351 | fc->BypassUpdate = EBPFBypassUpdate; | |
2352 | fc->BypassFree = EBPFBypassFree; | |
2353 | fc->bypass_data = eb; | |
9206b30f EL |
2354 | } else { |
2355 | EBPFDeleteKey(map_fd, key0); | |
2356 | EBPFDeleteKey(map_fd, key1); | |
2357 | LiveDevAddBypassFail(p->livedev, 1, family); | |
2358 | SCFree(key0); | |
2359 | SCFree(key1); | |
2360 | return 0; | |
b07bda7a | 2361 | } |
9206b30f EL |
2362 | |
2363 | LiveDevAddBypassStats(p->livedev, 1, family); | |
6126f105 | 2364 | LiveDevAddBypassSuccess(p->livedev, 1, family); |
b07bda7a EL |
2365 | return 1; |
2366 | } | |
2367 | ||
06173267 EL |
2368 | #endif |
2369 | ||
2598078e | 2370 | /** |
94a622cb EL |
2371 | * Bypass function for AF_PACKET capture in eBPF mode |
2372 | * | |
2373 | * This function creates two half flows in the map shared with the kernel | |
2374 | * to trigger bypass. | |
2375 | * | |
2376 | * The implementation of bypass is done via an IPv4 and an IPv6 flow table. | |
2377 | * This table contains the list of half flows to bypass. The in-kernel filter | |
2378 | * will skip/drop the packet if they belong to a flow in one of the flows | |
2379 | * table. | |
2380 | * | |
2381 | * \param p the packet belonging to the flow to bypass | |
2382 | * \return 0 if unable to bypass, 1 if success | |
2598078e | 2383 | */ |
06173267 EL |
2384 | static int AFPBypassCallback(Packet *p) |
2385 | { | |
2386 | #ifdef HAVE_PACKET_EBPF | |
2387 | SCLogDebug("Calling af_packet callback function"); | |
2388 | /* Only bypass TCP and UDP */ | |
2389 | if (!(PKT_IS_TCP(p) || PKT_IS_UDP(p))) { | |
2390 | return 0; | |
2391 | } | |
2392 | ||
fc2f2fa7 EL |
2393 | /* If we don't have a flow attached to packet the eBPF map entries |
2394 | * will be destroyed at first flow bypass manager pass as we won't | |
2395 | * find any associated entry */ | |
2396 | if (p->flow == NULL) { | |
2397 | return 0; | |
2398 | } | |
06173267 EL |
2399 | /* Bypassing tunneled packets is currently not supported |
2400 | * because we can't discard the inner packet only due to | |
2401 | * primitive parsing in eBPF */ | |
2402 | if (IS_TUNNEL_PKT(p)) { | |
2403 | return 0; | |
2404 | } | |
06173267 | 2405 | if (PKT_IS_IPV4(p)) { |
d65f4585 | 2406 | SCLogDebug("add an IPv4"); |
eff10fce EL |
2407 | if (p->afp_v.v4_map_fd == -1) { |
2408 | return 0; | |
2409 | } | |
b07bda7a EL |
2410 | struct flowv4_keys *keys[2]; |
2411 | keys[0] = SCCalloc(1, sizeof(struct flowv4_keys)); | |
2412 | if (keys[0] == NULL) { | |
2413 | return 0; | |
2414 | } | |
2415 | keys[0]->src = htonl(GET_IPV4_SRC_ADDR_U32(p)); | |
2416 | keys[0]->dst = htonl(GET_IPV4_DST_ADDR_U32(p)); | |
2417 | keys[0]->port16[0] = GET_TCP_SRC_PORT(p); | |
2418 | keys[0]->port16[1] = GET_TCP_DST_PORT(p); | |
d119845d EL |
2419 | keys[0]->vlan0 = p->vlan_id[0]; |
2420 | keys[0]->vlan1 = p->vlan_id[1]; | |
8c880879 | 2421 | |
d119845d EL |
2422 | if (IPV4_GET_IPPROTO(p) == IPPROTO_TCP) { |
2423 | keys[0]->ip_proto = 1; | |
2424 | } else { | |
2425 | keys[0]->ip_proto = 0; | |
2426 | } | |
69d2c8eb | 2427 | if (AFPInsertHalfFlow(p->afp_v.v4_map_fd, keys[0], |
fc2f2fa7 | 2428 | p->afp_v.nr_cpus) == 0) { |
9206b30f | 2429 | LiveDevAddBypassFail(p->livedev, 1, AF_INET); |
b07bda7a EL |
2430 | SCFree(keys[0]); |
2431 | return 0; | |
2432 | } | |
2433 | keys[1]= SCCalloc(1, sizeof(struct flowv4_keys)); | |
2434 | if (keys[1] == NULL) { | |
9206b30f EL |
2435 | EBPFDeleteKey(p->afp_v.v4_map_fd, keys[0]); |
2436 | LiveDevAddBypassFail(p->livedev, 1, AF_INET); | |
b07bda7a | 2437 | SCFree(keys[0]); |
06173267 EL |
2438 | return 0; |
2439 | } | |
b07bda7a EL |
2440 | keys[1]->src = htonl(GET_IPV4_DST_ADDR_U32(p)); |
2441 | keys[1]->dst = htonl(GET_IPV4_SRC_ADDR_U32(p)); | |
2442 | keys[1]->port16[0] = GET_TCP_DST_PORT(p); | |
2443 | keys[1]->port16[1] = GET_TCP_SRC_PORT(p); | |
d119845d EL |
2444 | keys[1]->vlan0 = p->vlan_id[0]; |
2445 | keys[1]->vlan1 = p->vlan_id[1]; | |
b07bda7a | 2446 | |
d119845d | 2447 | keys[1]->ip_proto = keys[0]->ip_proto; |
69d2c8eb | 2448 | if (AFPInsertHalfFlow(p->afp_v.v4_map_fd, keys[1], |
fc2f2fa7 | 2449 | p->afp_v.nr_cpus) == 0) { |
9206b30f EL |
2450 | EBPFDeleteKey(p->afp_v.v4_map_fd, keys[0]); |
2451 | LiveDevAddBypassFail(p->livedev, 1, AF_INET); | |
b07bda7a EL |
2452 | SCFree(keys[0]); |
2453 | SCFree(keys[1]); | |
06173267 EL |
2454 | return 0; |
2455 | } | |
315c29a8 | 2456 | EBPFUpdateFlow(p->flow, p, NULL); |
9206b30f | 2457 | return AFPSetFlowStorage(p, p->afp_v.v4_map_fd, keys[0], keys[1], AF_INET); |
06173267 EL |
2458 | } |
2459 | /* For IPv6 case we don't handle extended header in eBPF */ | |
6062c27e | 2460 | if (PKT_IS_IPV6(p) && |
06173267 | 2461 | ((IPV6_GET_NH(p) == IPPROTO_TCP) || (IPV6_GET_NH(p) == IPPROTO_UDP))) { |
d65f4585 | 2462 | int i; |
eff10fce EL |
2463 | if (p->afp_v.v6_map_fd == -1) { |
2464 | return 0; | |
2465 | } | |
06173267 | 2466 | SCLogDebug("add an IPv6"); |
b07bda7a EL |
2467 | struct flowv6_keys *keys[2]; |
2468 | keys[0] = SCCalloc(1, sizeof(struct flowv6_keys)); | |
2469 | if (keys[0] == NULL) { | |
9206b30f | 2470 | LiveDevAddBypassFail(p->livedev, 1, AF_INET6); |
b07bda7a EL |
2471 | return 0; |
2472 | } | |
06173267 | 2473 | for (i = 0; i < 4; i++) { |
b07bda7a EL |
2474 | keys[0]->src[i] = ntohl(GET_IPV6_SRC_ADDR(p)[i]); |
2475 | keys[0]->dst[i] = ntohl(GET_IPV6_DST_ADDR(p)[i]); | |
2476 | } | |
2477 | keys[0]->port16[0] = GET_TCP_SRC_PORT(p); | |
2478 | keys[0]->port16[1] = GET_TCP_DST_PORT(p); | |
d119845d EL |
2479 | keys[0]->vlan0 = p->vlan_id[0]; |
2480 | keys[0]->vlan1 = p->vlan_id[1]; | |
2481 | ||
2482 | if (IPV6_GET_NH(p) == IPPROTO_TCP) { | |
2483 | keys[0]->ip_proto = 1; | |
2484 | } else { | |
2485 | keys[0]->ip_proto = 0; | |
2486 | } | |
69d2c8eb | 2487 | if (AFPInsertHalfFlow(p->afp_v.v6_map_fd, keys[0], |
fc2f2fa7 | 2488 | p->afp_v.nr_cpus) == 0) { |
9206b30f | 2489 | LiveDevAddBypassFail(p->livedev, 1, AF_INET6); |
b07bda7a | 2490 | SCFree(keys[0]); |
06173267 EL |
2491 | return 0; |
2492 | } | |
b07bda7a EL |
2493 | keys[1]= SCCalloc(1, sizeof(struct flowv6_keys)); |
2494 | if (keys[1] == NULL) { | |
9206b30f EL |
2495 | EBPFDeleteKey(p->afp_v.v6_map_fd, keys[0]); |
2496 | LiveDevAddBypassFail(p->livedev, 1, AF_INET6); | |
b07bda7a EL |
2497 | SCFree(keys[0]); |
2498 | return 0; | |
06173267 | 2499 | } |
b07bda7a EL |
2500 | for (i = 0; i < 4; i++) { |
2501 | keys[1]->src[i] = ntohl(GET_IPV6_DST_ADDR(p)[i]); | |
2502 | keys[1]->dst[i] = ntohl(GET_IPV6_SRC_ADDR(p)[i]); | |
2503 | } | |
2504 | keys[1]->port16[0] = GET_TCP_DST_PORT(p); | |
2505 | keys[1]->port16[1] = GET_TCP_SRC_PORT(p); | |
d119845d EL |
2506 | keys[1]->vlan0 = p->vlan_id[0]; |
2507 | keys[1]->vlan1 = p->vlan_id[1]; | |
2508 | ||
2509 | keys[1]->ip_proto = keys[0]->ip_proto; | |
69d2c8eb | 2510 | if (AFPInsertHalfFlow(p->afp_v.v6_map_fd, keys[1], |
fc2f2fa7 | 2511 | p->afp_v.nr_cpus) == 0) { |
9206b30f EL |
2512 | EBPFDeleteKey(p->afp_v.v6_map_fd, keys[0]); |
2513 | LiveDevAddBypassFail(p->livedev, 1, AF_INET6); | |
b07bda7a EL |
2514 | SCFree(keys[0]); |
2515 | SCFree(keys[1]); | |
06173267 EL |
2516 | return 0; |
2517 | } | |
fc2f2fa7 EL |
2518 | if (p->flow) |
2519 | EBPFUpdateFlow(p->flow, p, NULL); | |
9206b30f | 2520 | return AFPSetFlowStorage(p, p->afp_v.v6_map_fd, keys[0], keys[1], AF_INET6); |
06173267 EL |
2521 | } |
2522 | #endif | |
2523 | return 0; | |
2524 | } | |
2525 | ||
94a622cb EL |
2526 | /** |
2527 | * Bypass function for AF_PACKET capture in XDP mode | |
2528 | * | |
2529 | * This function creates two half flows in the map shared with the kernel | |
2530 | * to trigger bypass. This function is similar to AFPBypassCallback() but | |
2531 | * the bytes order is changed for some data due to the way we get the data | |
2532 | * in the XDP case. | |
2533 | * | |
2534 | * \param p the packet belonging to the flow to bypass | |
2535 | * \return 0 if unable to bypass, 1 if success | |
2536 | */ | |
8c880879 EL |
2537 | static int AFPXDPBypassCallback(Packet *p) |
2538 | { | |
2539 | #ifdef HAVE_PACKET_XDP | |
2540 | SCLogDebug("Calling af_packet callback function"); | |
2541 | /* Only bypass TCP and UDP */ | |
2542 | if (!(PKT_IS_TCP(p) || PKT_IS_UDP(p))) { | |
2543 | return 0; | |
2544 | } | |
2545 | ||
fc2f2fa7 EL |
2546 | /* If we don't have a flow attached to packet the eBPF map entries |
2547 | * will be destroyed at first flow bypass manager pass as we won't | |
2548 | * find any associated entry */ | |
2549 | if (p->flow == NULL) { | |
2550 | return 0; | |
2551 | } | |
8c880879 EL |
2552 | /* Bypassing tunneled packets is currently not supported |
2553 | * because we can't discard the inner packet only due to | |
2554 | * primitive parsing in eBPF */ | |
2555 | if (IS_TUNNEL_PKT(p)) { | |
2556 | return 0; | |
2557 | } | |
8c880879 | 2558 | if (PKT_IS_IPV4(p)) { |
b07bda7a EL |
2559 | struct flowv4_keys *keys[2]; |
2560 | keys[0]= SCCalloc(1, sizeof(struct flowv4_keys)); | |
2561 | if (keys[0] == NULL) { | |
9206b30f | 2562 | LiveDevAddBypassFail(p->livedev, 1, AF_INET); |
b07bda7a EL |
2563 | return 0; |
2564 | } | |
eff10fce | 2565 | if (p->afp_v.v4_map_fd == -1) { |
b07bda7a | 2566 | SCFree(keys[0]); |
eff10fce EL |
2567 | return 0; |
2568 | } | |
b07bda7a EL |
2569 | keys[0]->src = p->src.addr_data32[0]; |
2570 | keys[0]->dst = p->dst.addr_data32[0]; | |
94a622cb | 2571 | /* In the XDP filter we get port from parsing of packet and not from skb |
6062c27e | 2572 | * (as in eBPF filter) so we need to pass from host to network order */ |
b07bda7a EL |
2573 | keys[0]->port16[0] = htons(p->sp); |
2574 | keys[0]->port16[1] = htons(p->dp); | |
d119845d EL |
2575 | keys[0]->vlan0 = p->vlan_id[0]; |
2576 | keys[0]->vlan1 = p->vlan_id[1]; | |
2577 | if (IPV4_GET_IPPROTO(p) == IPPROTO_TCP) { | |
2578 | keys[0]->ip_proto = 1; | |
2579 | } else { | |
2580 | keys[0]->ip_proto = 0; | |
2581 | } | |
69d2c8eb | 2582 | if (AFPInsertHalfFlow(p->afp_v.v4_map_fd, keys[0], |
fc2f2fa7 | 2583 | p->afp_v.nr_cpus) == 0) { |
9206b30f | 2584 | LiveDevAddBypassFail(p->livedev, 1, AF_INET); |
b07bda7a EL |
2585 | SCFree(keys[0]); |
2586 | return 0; | |
2587 | } | |
2588 | keys[1]= SCCalloc(1, sizeof(struct flowv4_keys)); | |
2589 | if (keys[1] == NULL) { | |
9206b30f EL |
2590 | EBPFDeleteKey(p->afp_v.v4_map_fd, keys[0]); |
2591 | LiveDevAddBypassFail(p->livedev, 1, AF_INET); | |
b07bda7a | 2592 | SCFree(keys[0]); |
8c880879 EL |
2593 | return 0; |
2594 | } | |
b07bda7a EL |
2595 | keys[1]->src = p->dst.addr_data32[0]; |
2596 | keys[1]->dst = p->src.addr_data32[0]; | |
2597 | keys[1]->port16[0] = htons(p->dp); | |
2598 | keys[1]->port16[1] = htons(p->sp); | |
d119845d EL |
2599 | keys[1]->vlan0 = p->vlan_id[0]; |
2600 | keys[1]->vlan1 = p->vlan_id[1]; | |
2601 | keys[1]->ip_proto = keys[0]->ip_proto; | |
69d2c8eb | 2602 | if (AFPInsertHalfFlow(p->afp_v.v4_map_fd, keys[1], |
fc2f2fa7 | 2603 | p->afp_v.nr_cpus) == 0) { |
9206b30f EL |
2604 | EBPFDeleteKey(p->afp_v.v4_map_fd, keys[0]); |
2605 | LiveDevAddBypassFail(p->livedev, 1, AF_INET); | |
b07bda7a EL |
2606 | SCFree(keys[0]); |
2607 | SCFree(keys[1]); | |
8c880879 EL |
2608 | return 0; |
2609 | } | |
9206b30f | 2610 | return AFPSetFlowStorage(p, p->afp_v.v4_map_fd, keys[0], keys[1], AF_INET); |
8c880879 EL |
2611 | } |
2612 | /* For IPv6 case we don't handle extended header in eBPF */ | |
6062c27e | 2613 | if (PKT_IS_IPV6(p) && |
8c880879 | 2614 | ((IPV6_GET_NH(p) == IPPROTO_TCP) || (IPV6_GET_NH(p) == IPPROTO_UDP))) { |
8c880879 | 2615 | SCLogDebug("add an IPv6"); |
eff10fce EL |
2616 | if (p->afp_v.v6_map_fd == -1) { |
2617 | return 0; | |
2618 | } | |
d65f4585 | 2619 | int i; |
b07bda7a EL |
2620 | struct flowv6_keys *keys[2]; |
2621 | keys[0] = SCCalloc(1, sizeof(struct flowv6_keys)); | |
2622 | if (keys[0] == NULL) { | |
2623 | return 0; | |
2624 | } | |
2625 | ||
8c880879 | 2626 | for (i = 0; i < 4; i++) { |
b07bda7a EL |
2627 | keys[0]->src[i] = GET_IPV6_SRC_ADDR(p)[i]; |
2628 | keys[0]->dst[i] = GET_IPV6_DST_ADDR(p)[i]; | |
2629 | } | |
2630 | keys[0]->port16[0] = htons(GET_TCP_SRC_PORT(p)); | |
2631 | keys[0]->port16[1] = htons(GET_TCP_DST_PORT(p)); | |
d119845d EL |
2632 | keys[0]->vlan0 = p->vlan_id[0]; |
2633 | keys[0]->vlan1 = p->vlan_id[1]; | |
2634 | if (IPV6_GET_NH(p) == IPPROTO_TCP) { | |
2635 | keys[0]->ip_proto = 1; | |
2636 | } else { | |
2637 | keys[0]->ip_proto = 0; | |
2638 | } | |
69d2c8eb | 2639 | if (AFPInsertHalfFlow(p->afp_v.v6_map_fd, keys[0], |
fc2f2fa7 | 2640 | p->afp_v.nr_cpus) == 0) { |
9206b30f | 2641 | LiveDevAddBypassFail(p->livedev, 1, AF_INET6); |
b07bda7a | 2642 | SCFree(keys[0]); |
8c880879 EL |
2643 | return 0; |
2644 | } | |
b07bda7a EL |
2645 | keys[1]= SCCalloc(1, sizeof(struct flowv6_keys)); |
2646 | if (keys[1] == NULL) { | |
9206b30f EL |
2647 | EBPFDeleteKey(p->afp_v.v6_map_fd, keys[0]); |
2648 | LiveDevAddBypassFail(p->livedev, 1, AF_INET6); | |
b07bda7a EL |
2649 | SCFree(keys[0]); |
2650 | return 0; | |
8c880879 | 2651 | } |
b07bda7a EL |
2652 | for (i = 0; i < 4; i++) { |
2653 | keys[1]->src[i] = GET_IPV6_DST_ADDR(p)[i]; | |
2654 | keys[1]->dst[i] = GET_IPV6_SRC_ADDR(p)[i]; | |
2655 | } | |
2656 | keys[1]->port16[0] = htons(GET_TCP_DST_PORT(p)); | |
2657 | keys[1]->port16[1] = htons(GET_TCP_SRC_PORT(p)); | |
d119845d EL |
2658 | keys[1]->vlan0 = p->vlan_id[0]; |
2659 | keys[1]->vlan1 = p->vlan_id[1]; | |
2660 | keys[1]->ip_proto = keys[0]->ip_proto; | |
69d2c8eb | 2661 | if (AFPInsertHalfFlow(p->afp_v.v6_map_fd, keys[1], |
fc2f2fa7 | 2662 | p->afp_v.nr_cpus) == 0) { |
9206b30f EL |
2663 | EBPFDeleteKey(p->afp_v.v6_map_fd, keys[0]); |
2664 | LiveDevAddBypassFail(p->livedev, 1, AF_INET6); | |
b07bda7a EL |
2665 | SCFree(keys[0]); |
2666 | SCFree(keys[1]); | |
8c880879 EL |
2667 | return 0; |
2668 | } | |
9206b30f | 2669 | return AFPSetFlowStorage(p, p->afp_v.v6_map_fd, keys[0], keys[1], AF_INET6); |
8c880879 EL |
2670 | } |
2671 | #endif | |
2672 | return 0; | |
2673 | } | |
2674 | ||
5e62ae6d EL |
2675 | |
2676 | bool g_flowv4_ok = true; | |
2677 | bool g_flowv6_ok = true; | |
2678 | ||
c45d8985 EL |
2679 | /** |
2680 | * \brief Init function for ReceiveAFP. | |
2681 | * | |
2682 | * \param tv pointer to ThreadVars | |
2683 | * \param initdata pointer to the interface passed from the user | |
2684 | * \param data pointer gets populated with AFPThreadVars | |
2685 | * | |
2686 | * \todo Create a general AFP setup function. | |
2687 | */ | |
ab1200fb | 2688 | TmEcode ReceiveAFPThreadInit(ThreadVars *tv, const void *initdata, void **data) |
8f1d7503 | 2689 | { |
c45d8985 | 2690 | SCEnter(); |
ab1200fb | 2691 | AFPIfaceConfig *afpconfig = (AFPIfaceConfig *)initdata; |
c45d8985 | 2692 | |
c45d8985 EL |
2693 | if (initdata == NULL) { |
2694 | SCLogError(SC_ERR_INVALID_ARGUMENT, "initdata == NULL"); | |
2695 | SCReturnInt(TM_ECODE_FAILED); | |
2696 | } | |
2697 | ||
2698 | AFPThreadVars *ptv = SCMalloc(sizeof(AFPThreadVars)); | |
e176be6f | 2699 | if (unlikely(ptv == NULL)) { |
45d5c3ca | 2700 | afpconfig->DerefFunc(afpconfig); |
c45d8985 | 2701 | SCReturnInt(TM_ECODE_FAILED); |
45d5c3ca | 2702 | } |
c45d8985 EL |
2703 | memset(ptv, 0, sizeof(AFPThreadVars)); |
2704 | ||
2705 | ptv->tv = tv; | |
2706 | ptv->cooked = 0; | |
2707 | ||
fbca1a4e | 2708 | strlcpy(ptv->iface, afpconfig->iface, AFP_IFACE_NAME_LENGTH); |
c45d8985 EL |
2709 | ptv->iface[AFP_IFACE_NAME_LENGTH - 1]= '\0'; |
2710 | ||
51eb9605 EL |
2711 | ptv->livedev = LiveGetDevice(ptv->iface); |
2712 | if (ptv->livedev == NULL) { | |
2713 | SCLogError(SC_ERR_INVALID_VALUE, "Unable to find Live device"); | |
11bdf483 | 2714 | SCFree(ptv); |
51eb9605 EL |
2715 | SCReturnInt(TM_ECODE_FAILED); |
2716 | } | |
2717 | ||
fbca1a4e | 2718 | ptv->buffer_size = afpconfig->buffer_size; |
8879df80 | 2719 | ptv->ring_size = afpconfig->ring_size; |
fa902abe | 2720 | ptv->block_size = afpconfig->block_size; |
8baf64f5 | 2721 | ptv->block_timeout = afpconfig->block_timeout; |
e80b30c0 | 2722 | |
df7dbe36 | 2723 | ptv->promisc = afpconfig->promisc; |
6062e00c | 2724 | ptv->checksum_mode = afpconfig->checksum_mode; |
6efd37a3 | 2725 | ptv->bpf_filter = NULL; |
df7dbe36 | 2726 | |
fbca1a4e | 2727 | ptv->threads = 1; |
e80b30c0 EL |
2728 | #ifdef HAVE_PACKET_FANOUT |
2729 | ptv->cluster_type = PACKET_FANOUT_LB; | |
2730 | ptv->cluster_id = 1; | |
2731 | /* We only set cluster info if the number of reader threads is greater than 1 */ | |
fbca1a4e | 2732 | if (afpconfig->threads > 1) { |
9d882116 VJ |
2733 | ptv->cluster_id = afpconfig->cluster_id; |
2734 | ptv->cluster_type = afpconfig->cluster_type; | |
2735 | ptv->threads = afpconfig->threads; | |
e80b30c0 EL |
2736 | } |
2737 | #endif | |
49b7b00f | 2738 | ptv->flags = afpconfig->flags; |
e80b30c0 | 2739 | |
f2a6fb8a EL |
2740 | if (afpconfig->bpf_filter) { |
2741 | ptv->bpf_filter = afpconfig->bpf_filter; | |
2742 | } | |
91e1256b EL |
2743 | ptv->ebpf_lb_fd = afpconfig->ebpf_lb_fd; |
2744 | ptv->ebpf_filter_fd = afpconfig->ebpf_filter_fd; | |
8c880879 | 2745 | ptv->xdp_mode = afpconfig->xdp_mode; |
36838017 | 2746 | #ifdef HAVE_PACKET_EBPF |
4cf53100 | 2747 | ptv->ebpf_t_config.cpus_count = UtilCpuGetNumProcessorsConfigured(); |
f2a6fb8a | 2748 | |
d65f4585 | 2749 | if (ptv->flags & (AFP_BYPASS|AFP_XDPBYPASS)) { |
126488f7 | 2750 | ptv->v4_map_fd = EBPFGetMapFDByName(ptv->iface, "flow_table_v4"); |
d65f4585 | 2751 | if (ptv->v4_map_fd == -1) { |
5e62ae6d EL |
2752 | if (g_flowv4_ok == false) { |
2753 | SCLogError(SC_ERR_INVALID_VALUE, "Can't find eBPF map fd for '%s'", | |
2754 | "flow_table_v4"); | |
2755 | g_flowv4_ok = true; | |
2756 | } | |
d65f4585 | 2757 | } |
126488f7 | 2758 | ptv->v6_map_fd = EBPFGetMapFDByName(ptv->iface, "flow_table_v6"); |
d65f4585 | 2759 | if (ptv->v6_map_fd == -1) { |
5e62ae6d EL |
2760 | if (g_flowv6_ok) { |
2761 | SCLogError(SC_ERR_INVALID_VALUE, "Can't find eBPF map fd for '%s'", | |
2762 | "flow_table_v6"); | |
2763 | g_flowv6_ok = false; | |
2764 | } | |
d65f4585 EL |
2765 | } |
2766 | } | |
4cf53100 | 2767 | ptv->ebpf_t_config = afpconfig->ebpf_t_config; |
d65f4585 EL |
2768 | #endif |
2769 | ||
6efd37a3 | 2770 | #ifdef PACKET_STATISTICS |
1ef786e7 VJ |
2771 | ptv->capture_kernel_packets = StatsRegisterCounter("capture.kernel_packets", |
2772 | ptv->tv); | |
2773 | ptv->capture_kernel_drops = StatsRegisterCounter("capture.kernel_drops", | |
2774 | ptv->tv); | |
9efa4ace EL |
2775 | ptv->capture_errors = StatsRegisterCounter("capture.errors", |
2776 | ptv->tv); | |
6efd37a3 EL |
2777 | #endif |
2778 | ||
662dccd8 EL |
2779 | ptv->copy_mode = afpconfig->copy_mode; |
2780 | if (ptv->copy_mode != AFP_COPY_MODE_NONE) { | |
2781 | strlcpy(ptv->out_iface, afpconfig->out_iface, AFP_IFACE_NAME_LENGTH); | |
2782 | ptv->out_iface[AFP_IFACE_NAME_LENGTH - 1]= '\0'; | |
b7e78d33 EL |
2783 | /* Warn about BPF filter consequence */ |
2784 | if (ptv->bpf_filter) { | |
2785 | SCLogWarning(SC_WARN_UNCOMMON, "Enabling a BPF filter in IPS mode result" | |
2786 | " in dropping all non matching packets."); | |
2787 | } | |
662dccd8 | 2788 | } |
c85ee1e3 | 2789 | |
b7e78d33 | 2790 | |
0581a23f EL |
2791 | if (AFPPeersListAdd(ptv) == TM_ECODE_FAILED) { |
2792 | SCFree(ptv); | |
2793 | afpconfig->DerefFunc(afpconfig); | |
2794 | SCReturnInt(TM_ECODE_FAILED); | |
2795 | } | |
2796 | ||
e80b30c0 EL |
2797 | #define T_DATA_SIZE 70000 |
2798 | ptv->data = SCMalloc(T_DATA_SIZE); | |
2799 | if (ptv->data == NULL) { | |
45d5c3ca | 2800 | afpconfig->DerefFunc(afpconfig); |
6019ae3d | 2801 | SCFree(ptv); |
e80b30c0 | 2802 | SCReturnInt(TM_ECODE_FAILED); |
c45d8985 | 2803 | } |
e80b30c0 EL |
2804 | ptv->datalen = T_DATA_SIZE; |
2805 | #undef T_DATA_SIZE | |
2806 | ||
c45d8985 | 2807 | *data = (void *)ptv; |
fbca1a4e | 2808 | |
45d5c3ca | 2809 | afpconfig->DerefFunc(afpconfig); |
71e47868 | 2810 | |
2cd6e128 EL |
2811 | /* If kernel is older than 3.0, VLAN is not stripped so we don't |
2812 | * get the info from packet extended header but we will use a standard | |
2813 | * parsing of packet data (See Linux commit bcc6d47903612c3861201cc3a866fb604f26b8b2) */ | |
bcc03f17 MF |
2814 | if (SCKernelVersionIsAtLeast(3, 0)) { |
2815 | ptv->flags |= AFP_VLAN_IN_HEADER; | |
2cd6e128 EL |
2816 | } |
2817 | ||
c45d8985 EL |
2818 | SCReturnInt(TM_ECODE_OK); |
2819 | } | |
2820 | ||
2821 | /** | |
2822 | * \brief This function prints stats to the screen at exit. | |
2823 | * \param tv pointer to ThreadVars | |
2824 | * \param data pointer that gets cast into AFPThreadVars for ptv | |
2825 | */ | |
8f1d7503 KS |
2826 | void ReceiveAFPThreadExitStats(ThreadVars *tv, void *data) |
2827 | { | |
c45d8985 EL |
2828 | SCEnter(); |
2829 | AFPThreadVars *ptv = (AFPThreadVars *)data; | |
9549faae EL |
2830 | |
2831 | #ifdef PACKET_STATISTICS | |
e8a4a4c4 | 2832 | AFPDumpCounters(ptv); |
b3bf7a57 | 2833 | SCLogPerf("(%s) Kernel: Packets %" PRIu64 ", dropped %" PRIu64 "", |
6efd37a3 | 2834 | tv->name, |
752f03e7 VJ |
2835 | StatsGetLocalCounterValue(tv, ptv->capture_kernel_packets), |
2836 | StatsGetLocalCounterValue(tv, ptv->capture_kernel_drops)); | |
9549faae | 2837 | #endif |
c45d8985 EL |
2838 | } |
2839 | ||
2840 | /** | |
2841 | * \brief DeInit function closes af packet socket at exit. | |
2842 | * \param tv pointer to ThreadVars | |
2843 | * \param data pointer that gets cast into AFPThreadVars for ptv | |
2844 | */ | |
8f1d7503 KS |
2845 | TmEcode ReceiveAFPThreadDeinit(ThreadVars *tv, void *data) |
2846 | { | |
c45d8985 EL |
2847 | AFPThreadVars *ptv = (AFPThreadVars *)data; |
2848 | ||
13f13b6d EL |
2849 | AFPSwitchState(ptv, AFP_STATE_DOWN); |
2850 | ||
8c880879 | 2851 | #ifdef HAVE_PACKET_XDP |
4cf53100 EL |
2852 | if ((ptv->ebpf_t_config.flags & EBPF_XDP_CODE) && |
2853 | (!(ptv->ebpf_t_config.flags & EBPF_PINNED_MAPS))) { | |
2854 | EBPFSetupXDP(ptv->iface, -1, ptv->xdp_mode); | |
2855 | } | |
8c880879 | 2856 | #endif |
e80b30c0 EL |
2857 | if (ptv->data != NULL) { |
2858 | SCFree(ptv->data); | |
2859 | ptv->data = NULL; | |
2860 | } | |
2861 | ptv->datalen = 0; | |
2862 | ||
f2a6fb8a | 2863 | ptv->bpf_filter = NULL; |
69d0d484 VJ |
2864 | if ((ptv->flags & AFP_TPACKET_V3) && ptv->ring.v3) { |
2865 | SCFree(ptv->ring.v3); | |
ce59ec5d | 2866 | } else { |
69d0d484 VJ |
2867 | if (ptv->ring.v2) |
2868 | SCFree(ptv->ring.v2); | |
ce59ec5d | 2869 | } |
f2a6fb8a | 2870 | |
7127ae2b | 2871 | SCFree(ptv); |
c45d8985 EL |
2872 | SCReturnInt(TM_ECODE_OK); |
2873 | } | |
2874 | ||
2875 | /** | |
2876 | * \brief This function passes off to link type decoders. | |
2877 | * | |
f8aed4ce | 2878 | * DecodeAFP decodes packets from AF_PACKET and passes |
c45d8985 EL |
2879 | * them off to the proper link type decoder. |
2880 | * | |
2881 | * \param t pointer to ThreadVars | |
2882 | * \param p pointer to the current packet | |
2883 | * \param data pointer that gets cast into AFPThreadVars for ptv | |
c45d8985 | 2884 | */ |
f8aed4ce | 2885 | TmEcode DecodeAFP(ThreadVars *tv, Packet *p, void *data) |
c45d8985 EL |
2886 | { |
2887 | SCEnter(); | |
2888 | DecodeThreadVars *dtv = (DecodeThreadVars *)data; | |
2889 | ||
7810f224 | 2890 | BUG_ON(PKT_IS_PSEUDOPKT(p)); |
f7b1aefa | 2891 | |
c45d8985 | 2892 | /* update counters */ |
14466a80 | 2893 | DecodeUpdatePacketCounters(tv, dtv, p); |
c45d8985 | 2894 | |
1fb7c0dd EL |
2895 | /* If suri has set vlan during reading, we increase vlan counter */ |
2896 | if (p->vlan_idx) { | |
1c0b4ee0 | 2897 | StatsIncr(tv, dtv->counter_vlan); |
1fb7c0dd EL |
2898 | } |
2899 | ||
c45d8985 | 2900 | /* call the decoder */ |
49dbb455 | 2901 | switch (p->datalink) { |
c45d8985 | 2902 | case LINKTYPE_ETHERNET: |
f8aed4ce | 2903 | DecodeEthernet(tv, dtv, p,GET_PKT_DATA(p), GET_PKT_LEN(p)); |
c45d8985 | 2904 | break; |
49dbb455 | 2905 | case LINKTYPE_LINUX_SLL: |
f8aed4ce | 2906 | DecodeSll(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p)); |
49dbb455 | 2907 | break; |
c45d8985 | 2908 | case LINKTYPE_PPP: |
f8aed4ce | 2909 | DecodePPP(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p)); |
c45d8985 EL |
2910 | break; |
2911 | case LINKTYPE_RAW: | |
f67aa5de | 2912 | case LINKTYPE_GRE_OVER_IP: |
f8aed4ce | 2913 | DecodeRaw(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p)); |
c45d8985 | 2914 | break; |
49dbb455 | 2915 | case LINKTYPE_NULL: |
f8aed4ce | 2916 | DecodeNull(tv, dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p)); |
49dbb455 | 2917 | break; |
c45d8985 EL |
2918 | default: |
2919 | SCLogError(SC_ERR_DATALINK_UNIMPLEMENTED, "Error: datalink type %" PRId32 " not yet supported in module DecodeAFP", p->datalink); | |
2920 | break; | |
2921 | } | |
2922 | ||
3088b6ac | 2923 | PacketDecodeFinalize(tv, dtv, p); |
e7f09f24 | 2924 | |
c45d8985 EL |
2925 | SCReturnInt(TM_ECODE_OK); |
2926 | } | |
2927 | ||
ab1200fb | 2928 | TmEcode DecodeAFPThreadInit(ThreadVars *tv, const void *initdata, void **data) |
c45d8985 EL |
2929 | { |
2930 | SCEnter(); | |
2931 | DecodeThreadVars *dtv = NULL; | |
2932 | ||
5f307aca | 2933 | dtv = DecodeThreadVarsAlloc(tv); |
c45d8985 EL |
2934 | |
2935 | if (dtv == NULL) | |
2936 | SCReturnInt(TM_ECODE_FAILED); | |
2937 | ||
2938 | DecodeRegisterPerfCounters(dtv, tv); | |
2939 | ||
2940 | *data = (void *)dtv; | |
2941 | ||
2942 | SCReturnInt(TM_ECODE_OK); | |
2943 | } | |
2944 | ||
2864f9ee VJ |
2945 | TmEcode DecodeAFPThreadDeinit(ThreadVars *tv, void *data) |
2946 | { | |
2947 | if (data != NULL) | |
98c88d51 | 2948 | DecodeThreadVarsFree(tv, data); |
2864f9ee VJ |
2949 | SCReturnInt(TM_ECODE_OK); |
2950 | } | |
2951 | ||
e80b30c0 | 2952 | #endif /* HAVE_AF_PACKET */ |
c45d8985 | 2953 | /* eof */ |
a6457262 EL |
2954 | /** |
2955 | * @} | |
2956 | */ |