2 * netsniff-ng - the packet sniffing beast
3 * Copyright 2009-2013 Daniel Borkmann.
4 * Copyright 2010 Emmanuel Roullit.
5 * Subject to the GPL, version 2.
16 #include <sys/socket.h>
17 #include <sys/types.h>
20 #include <sys/fsuid.h>
47 #include "tstamping.h"
48 #include "dissector.h"
57 char *device_in
, *device_out
, *device_trans
, *filter
, *prefix
;
58 int cpu
, rfraw
, dump
, print_mode
, dump_dir
, packet_type
, lo_ifindex
;
59 unsigned long kpull
, dump_interval
, tx_bytes
, tx_packets
;
61 bool randomize
, promiscuous
, enforce
, jumbo
, dump_bpf
, hwtimestamp
, verbose
;
62 enum pcap_ops_groups pcap
;
63 enum dump_mode dump_mode
;
66 uint32_t link_type
, magic
;
67 uint32_t fanout_group
, fanout_type
;
68 uint64_t pkts_seen
, pkts_recvd
, pkts_drops
;
69 uint64_t pkts_recvd_last
, pkts_drops_last
, pkts_skipd_last
;
72 static volatile sig_atomic_t sigint
= 0, sighup
= 0;
73 static volatile bool next_dump
= false;
74 static volatile sig_atomic_t sighup_time
= 0;
76 static const char *short_options
=
77 "d:i:o:rf:MNJt:S:k:n:b:HQmcsqXlvhF:RGAP:Vu:g:T:DBUC:K:L:w";
78 static const struct option long_options
[] = {
79 {"dev", required_argument
, NULL
, 'd'},
80 {"in", required_argument
, NULL
, 'i'},
81 {"out", required_argument
, NULL
, 'o'},
82 {"filter", required_argument
, NULL
, 'f'},
83 {"num", required_argument
, NULL
, 'n'},
84 {"type", required_argument
, NULL
, 't'},
85 {"interval", required_argument
, NULL
, 'F'},
86 {"ring-size", required_argument
, NULL
, 'S'},
87 {"kernel-pull", required_argument
, NULL
, 'k'},
88 {"bind-cpu", required_argument
, NULL
, 'b'},
89 {"prefix", required_argument
, NULL
, 'P'},
90 {"user", required_argument
, NULL
, 'u'},
91 {"group", required_argument
, NULL
, 'g'},
92 {"magic", required_argument
, NULL
, 'T'},
93 {"fanout-group", required_argument
, NULL
, 'C'},
94 {"fanout-type", required_argument
, NULL
, 'K'},
95 {"fanout-opts", required_argument
, NULL
, 'L'},
96 {"rand", no_argument
, NULL
, 'r'},
97 {"rfraw", no_argument
, NULL
, 'R'},
98 {"mmap", no_argument
, NULL
, 'm'},
99 {"sg", no_argument
, NULL
, 'G'},
100 {"clrw", no_argument
, NULL
, 'c'},
101 {"jumbo-support", no_argument
, NULL
, 'J'},
102 {"no-promisc", no_argument
, NULL
, 'M'},
103 {"no-hwtimestamp", no_argument
, NULL
, 'N'},
104 {"prio-high", no_argument
, NULL
, 'H'},
105 {"notouch-irq", no_argument
, NULL
, 'Q'},
106 {"dump-pcap-types", no_argument
, NULL
, 'D'},
107 {"dump-bpf", no_argument
, NULL
, 'B'},
108 {"silent", no_argument
, NULL
, 's'},
109 {"less", no_argument
, NULL
, 'q'},
110 {"hex", no_argument
, NULL
, 'X'},
111 {"ascii", no_argument
, NULL
, 'l'},
112 {"no-sock-mem", no_argument
, NULL
, 'A'},
113 {"update", no_argument
, NULL
, 'U'},
114 {"cooked", no_argument
, NULL
, 'w'},
115 {"verbose", no_argument
, NULL
, 'V'},
116 {"version", no_argument
, NULL
, 'v'},
117 {"help", no_argument
, NULL
, 'h'},
121 static const char *copyright
= "Please report bugs to <netsniff-ng@googlegroups.com>\n"
122 "Copyright (C) 2009-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>\n"
123 "Copyright (C) 2009-2012 Emmanuel Roullit <emmanuel.roullit@gmail.com>\n"
124 "Copyright (C) 2012 Markus Amend <markus@netsniff-ng.org>\n"
125 "Swiss federal institute of technology (ETH Zurich)\n"
126 "License: GNU GPL version 2.0\n"
127 "This is free software: you are free to change and redistribute it.\n"
128 "There is NO WARRANTY, to the extent permitted by law.";
131 static struct itimerval itimer
;
132 static unsigned long frame_count_max
= 0, interval
= TX_KERNEL_PULL_INT
;
133 static time_t start_time
;
135 #define __pcap_io pcap_ops[ctx->pcap]
137 static void signal_handler(int number
)
147 sighup_time
= (sig_atomic_t)(time(NULL
) - start_time
);
154 static void timer_elapsed(int unused __maybe_unused
)
158 set_itimer_interval_value(&itimer
, 0, interval
);
160 ret
= pull_and_flush_tx_ring(tx_sock
);
161 if (unlikely(ret
< 0)) {
162 /* We could hit EBADF if the socket has been closed before
163 * the timer was triggered.
165 if (errno
!= EBADF
&& errno
!= ENOBUFS
)
166 panic("Flushing TX_RING failed: %s!\n", strerror(errno
));
169 setitimer(ITIMER_REAL
, &itimer
, NULL
);
172 static void timer_purge(void)
176 ret
= pull_and_flush_tx_ring_wait(tx_sock
);
177 if (unlikely(ret
< 0)) {
178 if (errno
!= EBADF
&& errno
!= ENOBUFS
)
179 panic("Flushing TX_RING failed: %s!\n", strerror(errno
));
182 set_itimer_interval_value(&itimer
, 0, 0);
183 setitimer(ITIMER_REAL
, &itimer
, NULL
);
186 static void timer_next_dump(int unused __maybe_unused
)
188 set_itimer_interval_value(&itimer
, interval
, 0);
190 setitimer(ITIMER_REAL
, &itimer
, NULL
);
193 static inline bool dump_to_pcap(struct ctx
*ctx
)
198 static void on_panic_del_rfmon(void *arg
)
200 leave_rfmon_mac80211(arg
);
203 static inline void setup_rfmon_mac80211_dev(struct ctx
*ctx
, char **rfmon_dev
)
205 ctx
->device_trans
= xstrdup(*rfmon_dev
);
208 enter_rfmon_mac80211(ctx
->device_trans
, rfmon_dev
);
209 panic_handler_add(on_panic_del_rfmon
, *rfmon_dev
);
212 static int update_rx_stats(struct ctx
*ctx
, int sock
, bool is_v3
)
214 uint64_t packets
, drops
;
217 ret
= get_rx_net_stats(sock
, &packets
, &drops
, is_v3
);
221 drops
+= ctx
->pkts_skipd_last
;
222 ctx
->pkts_seen
+= ctx
->pkts_skipd_last
;
223 ctx
->pkts_recvd
+= packets
;
224 ctx
->pkts_drops
+= drops
;
225 ctx
->pkts_recvd_last
= packets
;
226 ctx
->pkts_drops_last
= drops
;
227 ctx
->pkts_skipd_last
= 0;
232 static void dump_rx_stats(struct ctx
*ctx
, int sock
, bool is_v3
)
234 if (update_rx_stats(ctx
, sock
, is_v3
))
237 printf("\r%12"PRIu64
" packets incoming (%"PRIu64
" unread on exit)\n",
238 is_v3
? ctx
->pkts_seen
: ctx
->pkts_recvd
,
239 is_v3
? ctx
->pkts_recvd
- ctx
->pkts_seen
: 0);
240 printf("\r%12"PRIu64
" packets passed filter\n",
241 ctx
->pkts_recvd
- ctx
->pkts_drops
);
242 printf("\r%12"PRIu64
" packets failed filter (out of space)\n",
245 if (ctx
->pkts_recvd
> 0)
246 printf("\r%12.4lf%% packet droprate\n",
247 (1.0 * ctx
->pkts_drops
/ ctx
->pkts_recvd
) * 100.0);
250 static void pcap_to_xmit(struct ctx
*ctx
)
253 int ifindex
, fd
= 0, ret
;
256 unsigned long trunced
= 0;
258 struct frame_map
*hdr
;
259 struct sock_fprog bpf_ops
;
260 struct timeval start
, end
, diff
;
263 if (!device_up_and_running(ctx
->device_out
) && !ctx
->rfraw
)
264 panic("Device not up and running!\n");
268 tx_sock
= pf_socket();
270 if (!strncmp("-", ctx
->device_in
, strlen("-"))) {
271 fd
= dup_or_die(fileno(stdin
));
272 close(fileno(stdin
));
273 if (ctx
->pcap
== PCAP_OPS_MM
)
274 ctx
->pcap
= PCAP_OPS_SG
;
276 fd
= open_or_die(ctx
->device_in
, O_RDONLY
| O_LARGEFILE
| O_NOATIME
);
279 if (__pcap_io
->init_once_pcap
)
280 __pcap_io
->init_once_pcap(true);
282 ret
= __pcap_io
->pull_fhdr_pcap(fd
, &ctx
->magic
, &ctx
->link_type
);
284 panic("Error reading pcap header!\n");
286 if (__pcap_io
->prepare_access_pcap
) {
287 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_RD
, ctx
->jumbo
);
289 panic("Error prepare reading pcap!\n");
293 setup_rfmon_mac80211_dev(ctx
, &ctx
->device_out
);
295 if (ctx
->link_type
!= LINKTYPE_IEEE802_11
&&
296 ctx
->link_type
!= LINKTYPE_IEEE802_11_RADIOTAP
)
297 panic("Wrong linktype of pcap!\n");
300 ifindex
= device_ifindex(ctx
->device_out
);
301 size
= ring_size(ctx
->device_out
, ctx
->reserve_size
);
303 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
305 bpf_dump_all(&bpf_ops
);
307 ring_tx_setup(&tx_ring
, tx_sock
, size
, ifindex
, ctx
->jumbo
, ctx
->verbose
);
309 dissector_init_all(ctx
->print_mode
);
311 if (ctx
->cpu
>= 0 && ifindex
> 0) {
312 int irq
= device_irq_number(ctx
->device_out
);
313 device_set_irq_affinity(irq
, ctx
->cpu
);
316 printf("IRQ: %s:%d > CPU%d\n",
317 ctx
->device_out
, irq
, ctx
->cpu
);
321 interval
= ctx
->kpull
;
323 set_itimer_interval_value(&itimer
, 0, interval
);
324 setitimer(ITIMER_REAL
, &itimer
, NULL
);
326 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
328 printf("Running! Hang up with ^C!\n\n");
331 bug_on(gettimeofday(&start
, NULL
));
333 while (likely(sigint
== 0)) {
334 while (user_may_pull_from_tx(tx_ring
.frames
[it
].iov_base
)) {
335 hdr
= tx_ring
.frames
[it
].iov_base
;
336 out
= ((uint8_t *) hdr
) + TPACKET2_HDRLEN
- sizeof(struct sockaddr_ll
);
339 ret
= __pcap_io
->read_pcap(fd
, &phdr
, ctx
->magic
, out
,
340 ring_frame_size(&tx_ring
));
341 if (unlikely(ret
<= 0))
344 if (ring_frame_size(&tx_ring
) <
345 pcap_get_length(&phdr
, ctx
->magic
)) {
346 pcap_set_length(&phdr
, ctx
->magic
,
347 ring_frame_size(&tx_ring
));
350 } while (ctx
->filter
&&
351 !bpf_run_filter(&bpf_ops
, out
,
352 pcap_get_length(&phdr
, ctx
->magic
)));
354 pcap_pkthdr_to_tpacket_hdr(&phdr
, ctx
->magic
, &hdr
->tp_h
, NULL
);
356 ctx
->tx_bytes
+= hdr
->tp_h
.tp_len
;;
359 show_frame_hdr(out
, hdr
->tp_h
.tp_snaplen
,
360 ctx
->link_type
, hdr
, ctx
->print_mode
,
363 dissector_entry_point(out
, hdr
->tp_h
.tp_snaplen
,
364 ctx
->link_type
, ctx
->print_mode
,
367 kernel_may_pull_from_tx(&hdr
->tp_h
);
370 if (it
>= tx_ring
.layout
.tp_frame_nr
)
373 if (unlikely(sigint
== 1))
376 if (frame_count_max
!= 0) {
377 if (ctx
->tx_packets
>= frame_count_max
) {
386 bug_on(gettimeofday(&end
, NULL
));
387 timersub(&end
, &start
, &diff
);
391 bpf_release(&bpf_ops
);
393 dissector_cleanup_all();
394 destroy_tx_ring(tx_sock
, &tx_ring
);
397 leave_rfmon_mac80211(ctx
->device_out
);
399 if (__pcap_io
->prepare_close_pcap
)
400 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_RD
);
402 if (!strncmp("-", ctx
->device_in
, strlen("-")))
403 dup2(fd
, fileno(stdin
));
410 printf("\r%12lu packets outgoing\n", ctx
->tx_packets
);
411 printf("\r%12lu packets truncated in file\n", trunced
);
412 printf("\r%12lu bytes outgoing\n", ctx
->tx_bytes
);
413 printf("\r%12lu sec, %lu usec in total\n", diff
.tv_sec
, diff
.tv_usec
);
416 static inline bool __skip_packet(struct ctx
*ctx
, struct sockaddr_ll
*sll
)
418 if (ctx
->packet_type
!= -1)
419 return ctx
->packet_type
!= sll
->sll_pkttype
;
421 /* when receving from the loopback device, each packet is seen twice,
422 * so drop the outgoing ones to avoid duplicates
424 return (sll
->sll_ifindex
== ctx
->lo_ifindex
) &&
425 (sll
->sll_pkttype
== PACKET_OUTGOING
);
428 static inline bool skip_packet(struct ctx
*ctx
, struct sockaddr_ll
*sll
)
430 bool skip
= __skip_packet(ctx
, sll
);
433 ctx
->pkts_skipd_last
++;
437 static void receive_to_xmit(struct ctx
*ctx
)
441 int rx_sock
, ifindex_in
, ifindex_out
, ret
;
442 size_t size_in
, size_out
;
443 unsigned int it_in
= 0, it_out
= 0;
444 struct frame_map
*hdr_in
, *hdr_out
;
445 struct ring tx_ring
, rx_ring
;
446 struct pollfd rx_poll
;
447 struct sock_fprog bpf_ops
;
449 if (!strncmp(ctx
->device_in
, ctx
->device_out
, IFNAMSIZ
))
450 panic("Ingress/egress devices must be different!\n");
451 if (!device_up_and_running(ctx
->device_out
))
452 panic("Egress device not up and running!\n");
454 rx_sock
= pf_socket();
455 tx_sock
= pf_socket();
457 ifindex_in
= device_ifindex(ctx
->device_in
);
458 ifindex_out
= device_ifindex(ctx
->device_out
);
460 size_in
= ring_size(ctx
->device_in
, ctx
->reserve_size
);
461 size_out
= ring_size(ctx
->device_out
, ctx
->reserve_size
);
463 enable_kernel_bpf_jit_compiler();
465 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
467 bpf_dump_all(&bpf_ops
);
468 bpf_attach_to_sock(rx_sock
, &bpf_ops
);
470 ring_rx_setup(&rx_ring
, rx_sock
, size_in
, ifindex_in
, &rx_poll
, false, ctx
->jumbo
,
471 ctx
->verbose
, ctx
->fanout_group
, ctx
->fanout_type
);
472 ring_tx_setup(&tx_ring
, tx_sock
, size_out
, ifindex_out
, ctx
->jumbo
, ctx
->verbose
);
474 dissector_init_all(ctx
->print_mode
);
476 if (ctx
->promiscuous
)
477 ifflags
= device_enter_promiscuous_mode(ctx
->device_in
);
480 interval
= ctx
->kpull
;
482 set_itimer_interval_value(&itimer
, 0, interval
);
483 setitimer(ITIMER_REAL
, &itimer
, NULL
);
485 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
487 printf("Running! Hang up with ^C!\n\n");
490 while (likely(sigint
== 0)) {
491 while (user_may_pull_from_rx(rx_ring
.frames
[it_in
].iov_base
)) {
492 hdr_in
= rx_ring
.frames
[it_in
].iov_base
;
493 in
= ((uint8_t *) hdr_in
) + hdr_in
->tp_h
.tp_mac
;
495 if (skip_packet(ctx
, &hdr_in
->s_ll
))
500 hdr_out
= tx_ring
.frames
[it_out
].iov_base
;
501 out
= ((uint8_t *) hdr_out
) + TPACKET2_HDRLEN
- sizeof(struct sockaddr_ll
);
503 while (!user_may_pull_from_tx(tx_ring
.frames
[it_out
].iov_base
) &&
506 next_rnd_slot(&it_out
, &tx_ring
);
509 if (it_out
>= tx_ring
.layout
.tp_frame_nr
)
513 hdr_out
= tx_ring
.frames
[it_out
].iov_base
;
514 out
= ((uint8_t *) hdr_out
) + TPACKET2_HDRLEN
- sizeof(struct sockaddr_ll
);
517 tpacket_hdr_clone(&hdr_out
->tp_h
, &hdr_in
->tp_h
);
518 fmemcpy(out
, in
, hdr_in
->tp_h
.tp_len
);
520 kernel_may_pull_from_tx(&hdr_out
->tp_h
);
522 next_rnd_slot(&it_out
, &tx_ring
);
525 if (it_out
>= tx_ring
.layout
.tp_frame_nr
)
529 show_frame_hdr(in
, hdr_in
->tp_h
.tp_snaplen
,
530 ctx
->link_type
, hdr_in
, ctx
->print_mode
,
533 dissector_entry_point(in
, hdr_in
->tp_h
.tp_snaplen
,
534 ctx
->link_type
, ctx
->print_mode
,
537 if (frame_count_max
!= 0) {
538 if (ctx
->pkts_seen
>= frame_count_max
) {
545 kernel_may_pull_from_rx(&hdr_in
->tp_h
);
548 if (it_in
>= rx_ring
.layout
.tp_frame_nr
)
551 if (unlikely(sigint
== 1))
555 ret
= poll(&rx_poll
, 1, -1);
556 if (unlikely(ret
< 0)) {
558 panic("Poll failed!\n");
565 dump_rx_stats(ctx
, rx_sock
, false);
567 bpf_release(&bpf_ops
);
569 dissector_cleanup_all();
571 destroy_tx_ring(tx_sock
, &tx_ring
);
572 destroy_rx_ring(rx_sock
, &rx_ring
);
574 if (ctx
->promiscuous
)
575 device_leave_promiscuous_mode(ctx
->device_in
, ifflags
);
581 static void translate_pcap_to_txf(int fdo
, uint8_t *out
, size_t len
)
583 size_t bytes_done
= 0;
586 slprintf(bout
, sizeof(bout
), "{\n ");
587 write_or_die(fdo
, bout
, strlen(bout
));
589 while (bytes_done
< len
) {
590 slprintf(bout
, sizeof(bout
), "0x%02x,", out
[bytes_done
]);
591 write_or_die(fdo
, bout
, strlen(bout
));
595 if (bytes_done
% 10 == 0) {
596 slprintf(bout
, sizeof(bout
), "\n");
597 write_or_die(fdo
, bout
, strlen(bout
));
599 if (bytes_done
< len
) {
600 slprintf(bout
, sizeof(bout
), " ");
601 write_or_die(fdo
, bout
, strlen(bout
));
603 } else if (bytes_done
< len
) {
604 slprintf(bout
, sizeof(bout
), " ");
605 write_or_die(fdo
, bout
, strlen(bout
));
608 if (bytes_done
% 10 != 0) {
609 slprintf(bout
, sizeof(bout
), "\n");
610 write_or_die(fdo
, bout
, strlen(bout
));
613 slprintf(bout
, sizeof(bout
), "}\n\n");
614 write_or_die(fdo
, bout
, strlen(bout
));
617 static void read_pcap(struct ctx
*ctx
)
620 int ret
, fd
, fdo
= 0;
621 unsigned long trunced
= 0;
624 struct sock_fprog bpf_ops
;
626 struct timeval start
, end
, diff
;
627 bool is_out_pcap
= ctx
->device_out
&& strstr(ctx
->device_out
, ".pcap");
628 const struct pcap_file_ops
*pcap_out_ops
= pcap_ops
[PCAP_OPS_RW
];
632 if (!strncmp("-", ctx
->device_in
, strlen("-"))) {
633 fd
= dup_or_die(fileno(stdin
));
634 close(fileno(stdin
));
635 if (ctx
->pcap
== PCAP_OPS_MM
)
636 ctx
->pcap
= PCAP_OPS_SG
;
638 /* O_NOATIME requires privileges, in case we don't have
639 * them, retry without them at a minor cost of updating
640 * atime in case the fs has been mounted as such.
642 fd
= open(ctx
->device_in
, O_RDONLY
| O_LARGEFILE
| O_NOATIME
);
643 if (fd
< 0 && errno
== EPERM
)
644 fd
= open_or_die(ctx
->device_in
, O_RDONLY
| O_LARGEFILE
);
646 panic("Cannot open file %s! %s.\n", ctx
->device_in
,
650 if (__pcap_io
->init_once_pcap
)
651 __pcap_io
->init_once_pcap(false);
653 ret
= __pcap_io
->pull_fhdr_pcap(fd
, &ctx
->magic
, &ctx
->link_type
);
655 panic("Error reading pcap header!\n");
657 if (__pcap_io
->prepare_access_pcap
) {
658 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_RD
, ctx
->jumbo
);
660 panic("Error prepare reading pcap!\n");
663 fmemset(&fm
, 0, sizeof(fm
));
665 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
667 bpf_dump_all(&bpf_ops
);
669 dissector_init_all(ctx
->print_mode
);
671 out_len
= round_up(1024 * 1024, RUNTIME_PAGE_SIZE
);
672 out
= xmalloc_aligned(out_len
, CO_CACHE_LINE_SIZE
);
674 if (ctx
->device_out
) {
675 if (!strncmp("-", ctx
->device_out
, strlen("-"))) {
676 fdo
= dup_or_die(fileno(stdout
));
677 close(fileno(stdout
));
679 fdo
= open_or_die_m(ctx
->device_out
, O_RDWR
| O_CREAT
|
680 O_TRUNC
| O_LARGEFILE
, DEFFILEMODE
);
685 ret
= pcap_out_ops
->push_fhdr_pcap(fdo
, ctx
->magic
,
688 panic("Error writing pcap header!\n");
691 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
693 printf("Running! Hang up with ^C!\n\n");
696 bug_on(gettimeofday(&start
, NULL
));
698 while (likely(sigint
== 0)) {
700 ret
= __pcap_io
->read_pcap(fd
, &phdr
, ctx
->magic
,
702 if (unlikely(ret
< 0))
705 if (unlikely(pcap_get_length(&phdr
, ctx
->magic
) == 0)) {
710 if (unlikely(pcap_get_length(&phdr
, ctx
->magic
) > out_len
)) {
711 pcap_set_length(&phdr
, ctx
->magic
, out_len
);
714 } while (ctx
->filter
&&
715 !bpf_run_filter(&bpf_ops
, out
,
716 pcap_get_length(&phdr
, ctx
->magic
)));
718 pcap_pkthdr_to_tpacket_hdr(&phdr
, ctx
->magic
, &fm
.tp_h
, &fm
.s_ll
);
720 ctx
->tx_bytes
+= fm
.tp_h
.tp_len
;
723 show_frame_hdr(out
, fm
.tp_h
.tp_snaplen
, ctx
->link_type
, &fm
,
724 ctx
->print_mode
, ctx
->tx_packets
);
726 dissector_entry_point(out
, fm
.tp_h
.tp_snaplen
,
727 ctx
->link_type
, ctx
->print_mode
,
731 size_t pcap_len
= pcap_get_length(&phdr
, ctx
->magic
);
732 int wlen
= pcap_out_ops
->write_pcap(fdo
, &phdr
,
735 if (unlikely(wlen
!= (int)pcap_get_total_length(&phdr
, ctx
->magic
)))
736 panic("Error writing to pcap!\n");
737 } else if (ctx
->device_out
) {
738 translate_pcap_to_txf(fdo
, out
, fm
.tp_h
.tp_snaplen
);
741 if (frame_count_max
!= 0) {
742 if (ctx
->tx_packets
>= frame_count_max
) {
750 bug_on(gettimeofday(&end
, NULL
));
751 timersub(&end
, &start
, &diff
);
753 bpf_release(&bpf_ops
);
755 dissector_cleanup_all();
757 if (__pcap_io
->prepare_close_pcap
)
758 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_RD
);
764 printf("\r%12lu packets outgoing\n", ctx
->tx_packets
);
765 printf("\r%12lu packets truncated in file\n", trunced
);
766 printf("\r%12lu bytes outgoing\n", ctx
->tx_bytes
);
767 printf("\r%12lu sec, %lu usec in total\n", diff
.tv_sec
, diff
.tv_usec
);
769 if (!strncmp("-", ctx
->device_in
, strlen("-")))
770 dup2(fd
, fileno(stdin
));
773 if (ctx
->device_out
) {
774 if (!strncmp("-", ctx
->device_out
, strlen("-")))
775 dup2(fdo
, fileno(stdout
));
780 static void finish_multi_pcap_file(struct ctx
*ctx
, int fd
)
782 __pcap_io
->fsync_pcap(fd
);
784 if (__pcap_io
->prepare_close_pcap
)
785 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_WR
);
789 fmemset(&itimer
, 0, sizeof(itimer
));
790 setitimer(ITIMER_REAL
, &itimer
, NULL
);
793 static int next_multi_pcap_file(struct ctx
*ctx
, int fd
)
799 __pcap_io
->fsync_pcap(fd
);
801 if (__pcap_io
->prepare_close_pcap
)
802 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_WR
);
806 if (sighup_time
> 0) {
807 ftime
= (time_t)(start_time
+ sighup_time
);
812 slprintf(fname
, sizeof(fname
), "%s/%s%lu.pcap", ctx
->device_out
,
813 ctx
->prefix
? : "dump-", ftime
);
815 fd
= open_or_die_m(fname
, O_RDWR
| O_CREAT
| O_TRUNC
|
816 O_LARGEFILE
, DEFFILEMODE
);
818 ret
= __pcap_io
->push_fhdr_pcap(fd
, ctx
->magic
, ctx
->link_type
);
820 panic("Error writing pcap header!\n");
822 if (__pcap_io
->prepare_access_pcap
) {
823 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_WR
, true);
825 panic("Error prepare writing pcap!\n");
831 static void reset_interval(struct ctx
*ctx
)
833 if (ctx
->dump_mode
== DUMP_INTERVAL_TIME
) {
834 interval
= ctx
->dump_interval
;
836 set_itimer_interval_value(&itimer
, interval
, 0);
837 setitimer(ITIMER_REAL
, &itimer
, NULL
);
843 static int begin_multi_pcap_file(struct ctx
*ctx
)
850 if (ctx
->device_out
[strlen(ctx
->device_out
) - 1] == '/')
851 ctx
->device_out
[strlen(ctx
->device_out
) - 1] = 0;
853 slprintf(fname
, sizeof(fname
), "%s/%s%lu.pcap", ctx
->device_out
,
854 ctx
->prefix
? : "dump-", time(NULL
));
856 fd
= open_or_die_m(fname
, O_RDWR
| O_CREAT
| O_TRUNC
|
857 O_LARGEFILE
, DEFFILEMODE
);
859 ret
= __pcap_io
->push_fhdr_pcap(fd
, ctx
->magic
, ctx
->link_type
);
861 panic("Error writing pcap header!\n");
863 if (__pcap_io
->prepare_access_pcap
) {
864 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_WR
, true);
866 panic("Error prepare writing pcap!\n");
874 static void finish_single_pcap_file(struct ctx
*ctx
, int fd
)
876 __pcap_io
->fsync_pcap(fd
);
878 if (__pcap_io
->prepare_close_pcap
)
879 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_WR
);
881 if (strncmp("-", ctx
->device_out
, strlen("-")))
884 dup2(fd
, fileno(stdout
));
887 static int begin_single_pcap_file(struct ctx
*ctx
)
893 if (!strncmp("-", ctx
->device_out
, strlen("-"))) {
894 fd
= dup_or_die(fileno(stdout
));
895 close(fileno(stdout
));
896 if (ctx
->pcap
== PCAP_OPS_MM
)
897 ctx
->pcap
= PCAP_OPS_SG
;
899 fd
= open_or_die_m(ctx
->device_out
,
900 O_RDWR
| O_CREAT
| O_TRUNC
|
901 O_LARGEFILE
, DEFFILEMODE
);
904 ret
= __pcap_io
->push_fhdr_pcap(fd
, ctx
->magic
, ctx
->link_type
);
906 panic("Error writing pcap header!\n");
908 if (__pcap_io
->prepare_access_pcap
) {
909 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_WR
, true);
911 panic("Error prepare writing pcap!\n");
917 static void update_pcap_next_dump(struct ctx
*ctx
, unsigned long snaplen
,
918 int *fd
, int sock
, bool is_v3
)
920 if (!dump_to_pcap(ctx
))
923 if (ctx
->dump_mode
== DUMP_INTERVAL_SIZE
) {
925 if (interval
> ctx
->dump_interval
) {
933 printf("SIGHUP received, prematurely rotating pcap\n");
940 *fd
= next_multi_pcap_file(ctx
, *fd
);
943 if (update_rx_stats(ctx
, sock
, is_v3
))
946 if (ctx
->verbose
&& ctx
->print_mode
== PRINT_NONE
)
947 printf(".(+%"PRIu64
"/-%"PRIu64
")",
948 ctx
->pkts_recvd_last
- ctx
->pkts_drops_last
,
949 ctx
->pkts_drops_last
);
954 static void walk_t3_block(struct block_desc
*pbd
, struct ctx
*ctx
,
957 int num_pkts
= pbd
->h1
.num_pkts
, i
;
958 struct tpacket3_hdr
*hdr
;
959 struct sockaddr_ll
*sll
;
961 hdr
= (void *) ((uint8_t *) pbd
+ pbd
->h1
.offset_to_first_pkt
);
962 sll
= (void *) ((uint8_t *) hdr
+ TPACKET_ALIGN(sizeof(*hdr
)));
964 for (i
= 0; i
< num_pkts
&& likely(sigint
== 0); ++i
) {
965 uint8_t *packet
= ((uint8_t *) hdr
+ hdr
->tp_mac
);
968 if (skip_packet(ctx
, sll
))
973 if (dump_to_pcap(ctx
)) {
976 tpacket3_hdr_to_pcap_pkthdr(hdr
, sll
, &phdr
, ctx
->magic
);
978 ret
= __pcap_io
->write_pcap(*fd
, &phdr
, ctx
->magic
, packet
,
979 pcap_get_length(&phdr
, ctx
->magic
));
980 if (unlikely(ret
!= (int) pcap_get_total_length(&phdr
, ctx
->magic
)))
981 panic("Write error to pcap!\n");
984 __show_frame_hdr(packet
, hdr
->tp_snaplen
, ctx
->link_type
, sll
,
985 hdr
, ctx
->print_mode
, true, ctx
->pkts_seen
);
987 dissector_entry_point(packet
, hdr
->tp_snaplen
, ctx
->link_type
,
988 ctx
->print_mode
, sll
);
990 hdr
= (void *) ((uint8_t *) hdr
+ hdr
->tp_next_offset
);
991 sll
= (void *) ((uint8_t *) hdr
+ TPACKET_ALIGN(sizeof(*hdr
)));
993 if (frame_count_max
!= 0) {
994 if (unlikely(ctx
->pkts_seen
>= frame_count_max
)) {
1000 update_pcap_next_dump(ctx
, hdr
->tp_snaplen
, fd
, sock
, true);
1003 #endif /* HAVE_TPACKET3 */
1005 static void recv_only_or_dump(struct ctx
*ctx
)
1008 int sock
, ifindex
, fd
= 0, ret
;
1010 unsigned int it
= 0;
1011 struct ring rx_ring
;
1012 struct pollfd rx_poll
;
1013 struct sock_fprog bpf_ops
;
1014 struct timeval start
, end
, diff
;
1015 bool is_v3
= is_defined(HAVE_TPACKET3
);
1017 sock
= pf_socket_type(ctx
->link_type
);
1019 ifindex
= device_ifindex(ctx
->device_in
);
1020 size
= ring_size(ctx
->device_in
, ctx
->reserve_size
);
1022 enable_kernel_bpf_jit_compiler();
1024 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
1026 bpf_dump_all(&bpf_ops
);
1027 bpf_attach_to_sock(sock
, &bpf_ops
);
1029 if (ctx
->hwtimestamp
) {
1030 ret
= set_sockopt_hwtimestamp(sock
, ctx
->device_in
);
1031 if (ret
== 0 && ctx
->verbose
)
1032 printf("HW timestamping enabled\n");
1035 ring_rx_setup(&rx_ring
, sock
, size
, ifindex
, &rx_poll
, is_v3
, true,
1036 ctx
->verbose
, ctx
->fanout_group
, ctx
->fanout_type
);
1038 dissector_init_all(ctx
->print_mode
);
1040 if (ctx
->cpu
>= 0 && ifindex
> 0) {
1041 int irq
= device_irq_number(ctx
->device_in
);
1042 device_set_irq_affinity(irq
, ctx
->cpu
);
1045 printf("IRQ: %s:%d > CPU%d\n",
1046 ctx
->device_in
, irq
, ctx
->cpu
);
1049 if (ctx
->promiscuous
)
1050 ifflags
= device_enter_promiscuous_mode(ctx
->device_in
);
1052 if (dump_to_pcap(ctx
) && __pcap_io
->init_once_pcap
)
1053 __pcap_io
->init_once_pcap(true);
1055 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
1057 if (dump_to_pcap(ctx
)) {
1060 ret
= stat(ctx
->device_out
, &stats
);
1064 ctx
->dump_dir
= S_ISDIR(stats
.st_mode
);
1067 fd
= begin_multi_pcap_file(ctx
);
1069 fd
= begin_single_pcap_file(ctx
);
1072 printf("Running! Hang up with ^C!\n\n");
1075 bug_on(gettimeofday(&start
, NULL
));
1077 while (likely(sigint
== 0)) {
1078 #ifdef HAVE_TPACKET3
1079 struct block_desc
*pbd
;
1081 while (user_may_pull_from_rx_block((pbd
= rx_ring
.frames
[it
].iov_base
))) {
1082 walk_t3_block(pbd
, ctx
, sock
, &fd
);
1084 kernel_may_pull_from_rx_block(pbd
);
1085 it
= (it
+ 1) % rx_ring
.layout3
.tp_block_nr
;
1087 if (unlikely(sigint
== 1))
1091 while (user_may_pull_from_rx(rx_ring
.frames
[it
].iov_base
)) {
1092 struct frame_map
*hdr
= rx_ring
.frames
[it
].iov_base
;
1093 uint8_t *packet
= ((uint8_t *) hdr
) + hdr
->tp_h
.tp_mac
;
1096 if (skip_packet(ctx
, &hdr
->s_ll
))
1101 if (unlikely(ring_frame_size(&rx_ring
) < hdr
->tp_h
.tp_snaplen
)) {
1102 /* XXX: silently ignore for now. We used to
1103 * report them with dump_rx_stats() */
1107 if (dump_to_pcap(ctx
)) {
1108 tpacket_hdr_to_pcap_pkthdr(&hdr
->tp_h
, &hdr
->s_ll
, &phdr
, ctx
->magic
);
1110 ret
= __pcap_io
->write_pcap(fd
, &phdr
, ctx
->magic
, packet
,
1111 pcap_get_length(&phdr
, ctx
->magic
));
1112 if (unlikely(ret
!= (int) pcap_get_total_length(&phdr
, ctx
->magic
)))
1113 panic("Write error to pcap!\n");
1116 show_frame_hdr(packet
, hdr
->tp_h
.tp_snaplen
,
1117 ctx
->link_type
, hdr
, ctx
->print_mode
,
1120 dissector_entry_point(packet
, hdr
->tp_h
.tp_snaplen
,
1121 ctx
->link_type
, ctx
->print_mode
,
1124 if (frame_count_max
!= 0) {
1125 if (unlikely(ctx
->pkts_seen
>= frame_count_max
)) {
1132 kernel_may_pull_from_rx(&hdr
->tp_h
);
1133 it
= (it
+ 1) % rx_ring
.layout
.tp_frame_nr
;
1135 if (unlikely(sigint
== 1))
1138 update_pcap_next_dump(ctx
, hdr
->tp_h
.tp_snaplen
, &fd
,
1141 #endif /* HAVE_TPACKET3 */
1143 ret
= poll(&rx_poll
, 1, -1);
1144 if (unlikely(ret
< 0)) {
1146 panic("Poll failed!\n");
1150 bug_on(gettimeofday(&end
, NULL
));
1151 timersub(&end
, &start
, &diff
);
1153 dump_rx_stats(ctx
, sock
, is_v3
);
1154 printf("\r%12lu sec, %lu usec in total\n",
1155 diff
.tv_sec
, diff
.tv_usec
);
1157 bpf_release(&bpf_ops
);
1158 dissector_cleanup_all();
1159 destroy_rx_ring(sock
, &rx_ring
);
1161 if (ctx
->promiscuous
)
1162 device_leave_promiscuous_mode(ctx
->device_in
, ifflags
);
1165 leave_rfmon_mac80211(ctx
->device_in
);
1167 if (dump_to_pcap(ctx
)) {
1169 finish_multi_pcap_file(ctx
, fd
);
1171 finish_single_pcap_file(ctx
, fd
);
1177 static void init_ctx(struct ctx
*ctx
)
1179 memset(ctx
, 0, sizeof(*ctx
));
1181 ctx
->uid
= getuid();
1182 ctx
->gid
= getgid();
1185 ctx
->packet_type
= -1;
1187 ctx
->fanout_type
= PACKET_FANOUT_ROLLOVER
;
1189 ctx
->magic
= ORIGINAL_TCPDUMP_MAGIC
;
1190 ctx
->print_mode
= PRINT_NORM
;
1191 ctx
->pcap
= PCAP_OPS_SG
;
1193 ctx
->dump_mode
= DUMP_INTERVAL_TIME
;
1194 ctx
->dump_interval
= 60;
1196 ctx
->promiscuous
= true;
1197 ctx
->randomize
= false;
1198 ctx
->hwtimestamp
= true;
1200 ctx
->pkts_recvd
= 0;
1202 ctx
->pkts_drops
= 0;
1203 ctx
->pkts_recvd_last
= 0;
1204 ctx
->pkts_drops_last
= 0;
1207 static void destroy_ctx(struct ctx
*ctx
)
1209 free(ctx
->device_in
);
1210 free(ctx
->device_out
);
1211 free(ctx
->device_trans
);
1216 static void __noreturn
help(void)
1218 printf("netsniff-ng %s, the packet sniffing beast\n", VERSION_STRING
);
1219 puts("http://www.netsniff-ng.org\n\n"
1220 "Usage: netsniff-ng [options] [filter-expression]\n"
1222 " -i|-d|--dev|--in <dev|pcap|-> Input source as netdev, pcap or pcap stdin\n"
1223 " -o|--out <dev|pcap|dir|cfg|-> Output sink as netdev, pcap, directory, trafgen, or stdout\n"
1224 " -C|--fanout-group <id> Join packet fanout group\n"
1225 " -K|--fanout-type <type> Apply fanout discipline: hash|lb|cpu|rnd|roll|qm\n"
1226 " -L|--fanout-opts <opts> Additional fanout options: defrag|roll\n"
1227 " -f|--filter <bpf-file|-|expr> Use BPF filter from bpfc file/stdin or tcpdump-like expression\n"
1228 " -t|--type <type> Filter for: host|broadcast|multicast|others|outgoing\n"
1229 " -F|--interval <size|time> Dump interval if -o is a dir: <num>KiB/MiB/GiB/s/sec/min/hrs\n"
1230 " -R|--rfraw Capture or inject raw 802.11 frames\n"
1231 " -n|--num <0|uint> Number of packets until exit (def: 0)\n"
1232 " -P|--prefix <name> Prefix for pcaps stored in directory\n"
1233 " -T|--magic <pcap-magic> Pcap magic number/pcap format to store, see -D\n"
1234 " -w|--cooked Use Linux \"cooked\" header instead of link header\n"
1235 " -D|--dump-pcap-types Dump pcap types and magic numbers and quit\n"
1236 " -B|--dump-bpf Dump generated BPF assembly\n"
1237 " -r|--rand Randomize packet forwarding order (dev->dev)\n"
1238 " -M|--no-promisc No promiscuous mode for netdev\n"
1239 " -A|--no-sock-mem Don't tune core socket memory\n"
1240 " -N|--no-hwtimestamp Disable hardware time stamping\n"
1241 " -m|--mmap Mmap(2) pcap file I/O, e.g. for replaying pcaps\n"
1242 " -G|--sg Scatter/gather pcap file I/O\n"
1243 " -c|--clrw Use slower read(2)/write(2) I/O\n"
1244 " -S|--ring-size <size> Specify ring size to: <num>KiB/MiB/GiB\n"
1245 " -k|--kernel-pull <uint> Kernel pull from user interval in us (def: 10us)\n"
1246 " -J|--jumbo-support Support replay/fwd 64KB Super Jumbo Frames (def: 2048B)\n"
1247 " -b|--bind-cpu <cpu> Bind to specific CPU\n"
1248 " -u|--user <userid> Drop privileges and change to userid\n"
1249 " -g|--group <groupid> Drop privileges and change to groupid\n"
1250 " -H|--prio-high Make this high priority process\n"
1251 " -Q|--notouch-irq Do not touch IRQ CPU affinity of NIC\n"
1252 " -s|--silent Do not print captured packets\n"
1253 " -q|--less Print less-verbose packet information\n"
1254 " -X|--hex Print packet data in hex format\n"
1255 " -l|--ascii Print human-readable packet data\n"
1256 " -U|--update Update GeoIP databases\n"
1257 " -V|--verbose Be more verbose\n"
1258 " -v|--version Show version and exit\n"
1259 " -h|--help Guess what?!\n\n"
1261 " netsniff-ng --in eth0 --out dump.pcap -s -T 0xa1b2c3d4 --b 0 tcp or udp\n"
1262 " netsniff-ng --in wlan0 --rfraw --out dump.pcap --silent --bind-cpu 0\n"
1263 " netsniff-ng --in dump.pcap --mmap --out eth0 -k1000 --silent --bind-cpu 0\n"
1264 " netsniff-ng --in dump.pcap --out dump.cfg --silent --bind-cpu 0\n"
1265 " netsniff-ng --in dump.pcap --out dump2.pcap --silent tcp\n"
1266 " netsniff-ng --in eth0 --out eth1 --silent --bind-cpu 0 -J --type host\n"
1267 " netsniff-ng --in eth1 --out /opt/probe/ -s -m --interval 100MiB -b 0\n"
1268 " netsniff-ng --in vlan0 --out dump.pcap -c -u `id -u bob` -g `id -g bob`\n"
1269 " netsniff-ng --in any --filter http.bpf --jumbo-support --ascii -V\n\n"
1271 " For introducing bit errors, delays with random variation and more\n"
1272 " while replaying pcaps, make use of tc(8) with its disciplines (e.g. netem).\n");
1277 static void __noreturn
version(void)
1279 printf("netsniff-ng %s, Git id: %s\n", VERSION_LONG
, GITVERSION
);
1280 puts("the packet sniffing beast\n"
1281 "http://www.netsniff-ng.org\n");
1286 int main(int argc
, char **argv
)
1289 int c
, i
, j
, cpu_tmp
, opt_index
, ops_touched
= 0, vals
[4] = {0};
1290 bool prio_high
= false, setsockmem
= true;
1291 void (*main_loop
)(struct ctx
*ctx
) = NULL
;
1295 start_time
= time(NULL
);
1298 while ((c
= getopt_long(argc
, argv
, short_options
, long_options
,
1299 &opt_index
)) != EOF
) {
1303 ctx
.device_in
= xstrdup(optarg
);
1306 ctx
.device_out
= xstrdup(optarg
);
1309 ctx
.prefix
= xstrdup(optarg
);
1315 ctx
.randomize
= true;
1321 ctx
.magic
= (uint32_t) strtoul(optarg
, NULL
, 0);
1322 pcap_check_magic(ctx
.magic
);
1325 ctx
.filter
= xstrdup(optarg
);
1328 ctx
.promiscuous
= false;
1331 ctx
.hwtimestamp
= false;
1337 ctx
.uid
= strtoul(optarg
, NULL
, 0);
1341 ctx
.gid
= strtoul(optarg
, NULL
, 0);
1345 ctx
.fanout_group
= strtoul(optarg
, NULL
, 0);
1346 if (ctx
.fanout_group
== 0)
1347 panic("Non-zero fanout group id required!\n");
1350 if (!strncmp(optarg
, "hash", strlen("hash")))
1351 ctx
.fanout_type
= PACKET_FANOUT_HASH
;
1352 else if (!strncmp(optarg
, "lb", strlen("lb")) ||
1353 !strncmp(optarg
, "rr", strlen("rr")))
1354 ctx
.fanout_type
= PACKET_FANOUT_LB
;
1355 else if (!strncmp(optarg
, "cpu", strlen("cpu")))
1356 ctx
.fanout_type
= PACKET_FANOUT_CPU
;
1357 else if (!strncmp(optarg
, "rnd", strlen("rnd")))
1358 ctx
.fanout_type
= PACKET_FANOUT_RND
;
1359 else if (!strncmp(optarg
, "roll", strlen("roll")))
1360 ctx
.fanout_type
= PACKET_FANOUT_ROLLOVER
;
1361 else if (!strncmp(optarg
, "qm", strlen("qm")))
1362 ctx
.fanout_type
= PACKET_FANOUT_QM
;
1364 panic("Unknown fanout type!\n");
1367 if (!strncmp(optarg
, "defrag", strlen("defrag")))
1368 ctx
.fanout_type
|= PACKET_FANOUT_FLAG_DEFRAG
;
1369 else if (!strncmp(optarg
, "roll", strlen("roll")))
1370 ctx
.fanout_type
|= PACKET_FANOUT_FLAG_ROLLOVER
;
1372 panic("Unknown fanout option!\n");
1375 if (!strncmp(optarg
, "host", strlen("host")))
1376 ctx
.packet_type
= PACKET_HOST
;
1377 else if (!strncmp(optarg
, "broadcast", strlen("broadcast")))
1378 ctx
.packet_type
= PACKET_BROADCAST
;
1379 else if (!strncmp(optarg
, "multicast", strlen("multicast")))
1380 ctx
.packet_type
= PACKET_MULTICAST
;
1381 else if (!strncmp(optarg
, "others", strlen("others")))
1382 ctx
.packet_type
= PACKET_OTHERHOST
;
1383 else if (!strncmp(optarg
, "outgoing", strlen("outgoing")))
1384 ctx
.packet_type
= PACKET_OUTGOING
;
1386 ctx
.packet_type
= -1;
1390 for (j
= i
= strlen(optarg
); i
> 0; --i
) {
1391 if (!isdigit(optarg
[j
- i
]))
1396 if (!strncmp(ptr
, "KiB", strlen("KiB")))
1397 ctx
.reserve_size
= 1 << 10;
1398 else if (!strncmp(ptr
, "MiB", strlen("MiB")))
1399 ctx
.reserve_size
= 1 << 20;
1400 else if (!strncmp(ptr
, "GiB", strlen("GiB")))
1401 ctx
.reserve_size
= 1 << 30;
1403 panic("Syntax error in ring size param!\n");
1405 ctx
.reserve_size
*= strtoul(optarg
, NULL
, 0);
1408 cpu_tmp
= strtol(optarg
, NULL
, 0);
1410 cpu_affinity(cpu_tmp
);
1418 ctx
.pcap
= PCAP_OPS_RW
;
1422 ctx
.pcap
= PCAP_OPS_MM
;
1426 ctx
.pcap
= PCAP_OPS_SG
;
1433 ctx
.print_mode
= PRINT_NONE
;
1436 ctx
.print_mode
= PRINT_LESS
;
1440 (ctx
.print_mode
== PRINT_ASCII
) ?
1441 PRINT_HEX_ASCII
: PRINT_HEX
;
1445 (ctx
.print_mode
== PRINT_HEX
) ?
1446 PRINT_HEX_ASCII
: PRINT_ASCII
;
1449 ctx
.kpull
= strtoul(optarg
, NULL
, 0);
1452 frame_count_max
= strtoul(optarg
, NULL
, 0);
1456 for (j
= i
= strlen(optarg
); i
> 0; --i
) {
1457 if (!isdigit(optarg
[j
- i
]))
1462 if (!strncmp(ptr
, "KiB", strlen("KiB"))) {
1463 ctx
.dump_interval
= 1 << 10;
1464 ctx
.dump_mode
= DUMP_INTERVAL_SIZE
;
1465 } else if (!strncmp(ptr
, "MiB", strlen("MiB"))) {
1466 ctx
.dump_interval
= 1 << 20;
1467 ctx
.dump_mode
= DUMP_INTERVAL_SIZE
;
1468 } else if (!strncmp(ptr
, "GiB", strlen("GiB"))) {
1469 ctx
.dump_interval
= 1 << 30;
1470 ctx
.dump_mode
= DUMP_INTERVAL_SIZE
;
1471 } else if (!strncmp(ptr
, "sec", strlen("sec"))) {
1472 ctx
.dump_interval
= 1;
1473 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1474 } else if (!strncmp(ptr
, "min", strlen("min"))) {
1475 ctx
.dump_interval
= 60;
1476 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1477 } else if (!strncmp(ptr
, "hrs", strlen("hrs"))) {
1478 ctx
.dump_interval
= 60 * 60;
1479 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1480 } else if (!strncmp(ptr
, "s", strlen("s"))) {
1481 ctx
.dump_interval
= 1;
1482 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1484 panic("Syntax error in time/size param!\n");
1487 ctx
.dump_interval
*= strtoul(optarg
, NULL
, 0);
1493 ctx
.dump_bpf
= true;
1496 pcap_dump_type_features();
1504 ctx
.link_type
= LINKTYPE_LINUX_SLL
;
1529 panic("Option -%c requires an argument!\n",
1532 if (isprint(optopt
))
1533 printf("Unknown option character `0x%X\'!\n", optopt
);
1541 if (!ctx
.filter
&& optind
!= argc
)
1542 ctx
.filter
= argv2str(optind
, argc
, argv
);
1545 ctx
.device_in
= xstrdup("any");
1547 if (!strcmp(ctx
.device_in
, "any") || !strcmp(ctx
.device_in
, "lo"))
1548 ctx
.lo_ifindex
= device_ifindex("lo");
1550 register_signal(SIGINT
, signal_handler
);
1551 register_signal(SIGQUIT
, signal_handler
);
1552 register_signal(SIGTERM
, signal_handler
);
1553 register_signal(SIGHUP
, signal_handler
);
1559 set_sched_status(SCHED_FIFO
, sched_get_priority_max(SCHED_FIFO
));
1562 if (device_mtu(ctx
.device_in
) || !strncmp("any", ctx
.device_in
, strlen(ctx
.device_in
))) {
1564 setup_rfmon_mac80211_dev(&ctx
, &ctx
.device_in
);
1567 ctx
.link_type
= pcap_dev_to_linktype(ctx
.device_in
);
1568 if (link_has_sll_hdr(ctx
.link_type
)) {
1569 switch (ctx
.magic
) {
1570 case ORIGINAL_TCPDUMP_MAGIC
:
1571 ctx
.magic
= ORIGINAL_TCPDUMP_MAGIC_LL
;
1573 case NSEC_TCPDUMP_MAGIC
:
1574 ctx
.magic
= NSEC_TCPDUMP_MAGIC_LL
;
1576 case ___constant_swab32(ORIGINAL_TCPDUMP_MAGIC
):
1577 ctx
.magic
= ___constant_swab32(ORIGINAL_TCPDUMP_MAGIC_LL
);
1579 case ___constant_swab32(NSEC_TCPDUMP_MAGIC
):
1580 ctx
.magic
= ___constant_swab32(NSEC_TCPDUMP_MAGIC_LL
);
1586 if (!ctx
.device_out
) {
1588 main_loop
= recv_only_or_dump
;
1589 } else if (device_mtu(ctx
.device_out
)) {
1590 register_signal_f(SIGALRM
, timer_elapsed
, SA_SIGINFO
);
1591 main_loop
= receive_to_xmit
;
1594 register_signal_f(SIGALRM
, timer_next_dump
, SA_SIGINFO
);
1595 main_loop
= recv_only_or_dump
;
1597 ctx
.pcap
= PCAP_OPS_SG
;
1600 if (ctx
.device_out
&& device_mtu(ctx
.device_out
)) {
1601 register_signal_f(SIGALRM
, timer_elapsed
, SA_SIGINFO
);
1602 main_loop
= pcap_to_xmit
;
1604 ctx
.pcap
= PCAP_OPS_MM
;
1607 main_loop
= read_pcap
;
1609 ctx
.pcap
= PCAP_OPS_SG
;
1617 set_system_socket_memory(vals
, array_size(vals
));
1622 printf("pcap file I/O method: %s\n", pcap_ops_group_to_str
[ctx
.pcap
]);
1629 reset_system_socket_memory(vals
, array_size(vals
));
1632 device_restore_irq_affinity_list();