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>
48 #include "tstamping.h"
49 #include "dissector.h"
58 char *device_in
, *device_out
, *device_trans
, *filter
, *prefix
;
59 int cpu
, rfraw
, dump
, print_mode
, dump_dir
, packet_type
, lo_ifindex
;
60 unsigned long kpull
, dump_interval
, tx_bytes
, tx_packets
;
62 bool randomize
, promiscuous
, enforce
, jumbo
, dump_bpf
, hwtimestamp
, verbose
;
63 enum pcap_ops_groups pcap
;
64 enum dump_mode dump_mode
;
67 uint32_t link_type
, magic
;
68 uint32_t fanout_group
, fanout_type
;
69 uint64_t pkts_seen
, pkts_recvd
, pkts_drops
;
70 uint64_t pkts_recvd_last
, pkts_drops_last
, pkts_skipd_last
;
71 unsigned long overwrite_interval
, file_number
;
74 static volatile sig_atomic_t sigint
= 0, sighup
= 0;
75 static volatile bool next_dump
= false;
76 static volatile sig_atomic_t sighup_time
= 0;
78 static const char *short_options
=
79 "d:i:o:rf:MNJt:S:k:n:b:HQmcsqXlvhF:RGAO:P:Vu:g:T:DBUC:K:L:w";
80 static const struct option long_options
[] = {
81 {"dev", required_argument
, NULL
, 'd'},
82 {"in", required_argument
, NULL
, 'i'},
83 {"out", required_argument
, NULL
, 'o'},
84 {"filter", required_argument
, NULL
, 'f'},
85 {"num", required_argument
, NULL
, 'n'},
86 {"type", required_argument
, NULL
, 't'},
87 {"interval", required_argument
, NULL
, 'F'},
88 {"ring-size", required_argument
, NULL
, 'S'},
89 {"kernel-pull", required_argument
, NULL
, 'k'},
90 {"bind-cpu", required_argument
, NULL
, 'b'},
91 {"overwrite", required_argument
, NULL
, 'O'},
92 {"prefix", required_argument
, NULL
, 'P'},
93 {"user", required_argument
, NULL
, 'u'},
94 {"group", required_argument
, NULL
, 'g'},
95 {"magic", required_argument
, NULL
, 'T'},
96 {"fanout-group", required_argument
, NULL
, 'C'},
97 {"fanout-type", required_argument
, NULL
, 'K'},
98 {"fanout-opts", required_argument
, NULL
, 'L'},
99 {"rand", no_argument
, NULL
, 'r'},
100 {"rfraw", no_argument
, NULL
, 'R'},
101 {"mmap", no_argument
, NULL
, 'm'},
102 {"sg", no_argument
, NULL
, 'G'},
103 {"clrw", no_argument
, NULL
, 'c'},
104 {"jumbo-support", no_argument
, NULL
, 'J'},
105 {"no-promisc", no_argument
, NULL
, 'M'},
106 {"no-hwtimestamp", no_argument
, NULL
, 'N'},
107 {"prio-high", no_argument
, NULL
, 'H'},
108 {"notouch-irq", no_argument
, NULL
, 'Q'},
109 {"dump-pcap-types", no_argument
, NULL
, 'D'},
110 {"dump-bpf", no_argument
, NULL
, 'B'},
111 {"silent", no_argument
, NULL
, 's'},
112 {"less", no_argument
, NULL
, 'q'},
113 {"hex", no_argument
, NULL
, 'X'},
114 {"ascii", no_argument
, NULL
, 'l'},
115 {"no-sock-mem", no_argument
, NULL
, 'A'},
116 {"update", no_argument
, NULL
, 'U'},
117 {"cooked", no_argument
, NULL
, 'w'},
118 {"verbose", no_argument
, NULL
, 'V'},
119 {"version", no_argument
, NULL
, 'v'},
120 {"help", no_argument
, NULL
, 'h'},
124 static const char *copyright
= "Please report bugs to <netsniff-ng@googlegroups.com>\n"
125 "Copyright (C) 2009-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>\n"
126 "Copyright (C) 2009-2012 Emmanuel Roullit <emmanuel.roullit@gmail.com>\n"
127 "Copyright (C) 2012 Markus Amend <markus@netsniff-ng.org>\n"
128 "Swiss federal institute of technology (ETH Zurich)\n"
129 "License: GNU GPL version 2.0\n"
130 "This is free software: you are free to change and redistribute it.\n"
131 "There is NO WARRANTY, to the extent permitted by law.";
134 static struct itimerval itimer
;
135 static unsigned long frame_count_max
= 0, interval
= TX_KERNEL_PULL_INT
;
136 static time_t start_time
;
138 #define __pcap_io pcap_ops[ctx->pcap]
140 static void signal_handler(int number
)
150 sighup_time
= (sig_atomic_t)(time(NULL
) - start_time
);
157 static void timer_elapsed(int unused __maybe_unused
)
161 set_itimer_interval_value(&itimer
, 0, interval
);
163 ret
= pull_and_flush_tx_ring(tx_sock
);
164 if (unlikely(ret
< 0)) {
165 /* We could hit EBADF if the socket has been closed before
166 * the timer was triggered.
168 if (errno
!= EBADF
&& errno
!= ENOBUFS
)
169 panic("Flushing TX_RING failed: %s!\n", strerror(errno
));
172 setitimer(ITIMER_REAL
, &itimer
, NULL
);
175 static void timer_purge(void)
179 ret
= pull_and_flush_tx_ring_wait(tx_sock
);
180 if (unlikely(ret
< 0)) {
181 if (errno
!= EBADF
&& errno
!= ENOBUFS
)
182 panic("Flushing TX_RING failed: %s!\n", strerror(errno
));
185 set_itimer_interval_value(&itimer
, 0, 0);
186 setitimer(ITIMER_REAL
, &itimer
, NULL
);
189 static void timer_next_dump(int unused __maybe_unused
)
191 set_itimer_interval_value(&itimer
, interval
, 0);
193 setitimer(ITIMER_REAL
, &itimer
, NULL
);
196 static inline bool dump_to_pcap(struct ctx
*ctx
)
201 static void on_panic_del_rfmon(void *arg
)
203 leave_rfmon_mac80211(arg
);
206 static inline void setup_rfmon_mac80211_dev(struct ctx
*ctx
, char **rfmon_dev
)
208 ctx
->device_trans
= xstrdup(*rfmon_dev
);
211 enter_rfmon_mac80211(ctx
->device_trans
, rfmon_dev
);
212 panic_handler_add(on_panic_del_rfmon
, *rfmon_dev
);
215 static int update_rx_stats(struct ctx
*ctx
, int sock
, bool is_v3
)
217 uint64_t packets
, drops
;
220 ret
= get_rx_net_stats(sock
, &packets
, &drops
, is_v3
);
224 drops
+= ctx
->pkts_skipd_last
;
225 ctx
->pkts_seen
+= ctx
->pkts_skipd_last
;
226 ctx
->pkts_recvd
+= packets
;
227 ctx
->pkts_drops
+= drops
;
228 ctx
->pkts_recvd_last
= packets
;
229 ctx
->pkts_drops_last
= drops
;
230 ctx
->pkts_skipd_last
= 0;
235 static void dump_rx_stats(struct ctx
*ctx
, int sock
, bool is_v3
)
237 if (update_rx_stats(ctx
, sock
, is_v3
))
240 printf("\r%12"PRIu64
" packets incoming (%"PRIu64
" unread on exit)\n",
241 is_v3
? ctx
->pkts_seen
: ctx
->pkts_recvd
,
242 is_v3
? ctx
->pkts_recvd
- ctx
->pkts_seen
: 0);
243 printf("\r%12"PRIu64
" packets passed filter\n",
244 ctx
->pkts_recvd
- ctx
->pkts_drops
);
245 printf("\r%12"PRIu64
" packets failed filter (out of space)\n",
248 if (ctx
->pkts_recvd
> 0)
249 printf("\r%12.4lf%% packet droprate\n",
250 (1.0 * ctx
->pkts_drops
/ ctx
->pkts_recvd
) * 100.0);
253 static void pcap_to_xmit(struct ctx
*ctx
)
256 int ifindex
, fd
= 0, ret
;
259 unsigned long trunced
= 0;
261 struct frame_map
*hdr
;
262 struct sock_fprog bpf_ops
;
263 struct timeval start
, end
, diff
;
266 if (!device_up_and_running(ctx
->device_out
) && !ctx
->rfraw
)
267 panic("Device not up and running!\n");
271 tx_sock
= pf_socket();
273 if (!strncmp("-", ctx
->device_in
, strlen("-"))) {
274 fd
= dup_or_die(fileno(stdin
));
275 close(fileno(stdin
));
276 if (ctx
->pcap
== PCAP_OPS_MM
)
277 ctx
->pcap
= PCAP_OPS_SG
;
279 fd
= open_or_die(ctx
->device_in
, O_RDONLY
| O_LARGEFILE
| O_NOATIME
);
282 if (__pcap_io
->init_once_pcap
)
283 __pcap_io
->init_once_pcap(true);
285 ret
= __pcap_io
->pull_fhdr_pcap(fd
, &ctx
->magic
, &ctx
->link_type
);
287 panic("Error reading pcap header!\n");
289 if (__pcap_io
->prepare_access_pcap
) {
290 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_RD
, ctx
->jumbo
);
292 panic("Error prepare reading pcap!\n");
296 setup_rfmon_mac80211_dev(ctx
, &ctx
->device_out
);
298 if (ctx
->link_type
!= LINKTYPE_IEEE802_11
&&
299 ctx
->link_type
!= LINKTYPE_IEEE802_11_RADIOTAP
)
300 panic("Wrong linktype of pcap!\n");
303 ifindex
= device_ifindex(ctx
->device_out
);
304 size
= ring_size(ctx
->device_out
, ctx
->reserve_size
);
306 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
308 bpf_dump_all(&bpf_ops
);
310 ring_tx_setup(&tx_ring
, tx_sock
, size
, ifindex
, ctx
->jumbo
, ctx
->verbose
);
312 dissector_init_all(ctx
->print_mode
);
314 if (ctx
->cpu
>= 0 && ifindex
> 0) {
315 int irq
= device_irq_number(ctx
->device_out
);
316 device_set_irq_affinity(irq
, ctx
->cpu
);
319 printf("IRQ: %s:%d > CPU%d\n",
320 ctx
->device_out
, irq
, ctx
->cpu
);
324 interval
= ctx
->kpull
;
326 set_itimer_interval_value(&itimer
, 0, interval
);
327 setitimer(ITIMER_REAL
, &itimer
, NULL
);
329 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
331 printf("Running! Hang up with ^C!\n\n");
334 bug_on(gettimeofday(&start
, NULL
));
336 while (likely(sigint
== 0)) {
337 while (user_may_pull_from_tx(tx_ring
.frames
[it
].iov_base
)) {
338 hdr
= tx_ring
.frames
[it
].iov_base
;
339 out
= ((uint8_t *) hdr
) + TPACKET2_HDRLEN
- sizeof(struct sockaddr_ll
);
342 ret
= __pcap_io
->read_pcap(fd
, &phdr
, ctx
->magic
, out
,
343 ring_frame_size(&tx_ring
));
344 if (unlikely(ret
<= 0))
347 if (ring_frame_size(&tx_ring
) <
348 pcap_get_length(&phdr
, ctx
->magic
)) {
349 pcap_set_length(&phdr
, ctx
->magic
,
350 ring_frame_size(&tx_ring
));
353 } while (ctx
->filter
&&
354 !bpf_run_filter(&bpf_ops
, out
,
355 pcap_get_length(&phdr
, ctx
->magic
)));
357 pcap_pkthdr_to_tpacket_hdr(&phdr
, ctx
->magic
, &hdr
->tp_h
, NULL
);
359 ctx
->tx_bytes
+= hdr
->tp_h
.tp_len
;;
362 show_frame_hdr(out
, hdr
->tp_h
.tp_snaplen
,
363 ctx
->link_type
, hdr
, ctx
->print_mode
,
366 dissector_entry_point(out
, hdr
->tp_h
.tp_snaplen
,
367 ctx
->link_type
, ctx
->print_mode
,
370 kernel_may_pull_from_tx(&hdr
->tp_h
);
373 if (it
>= tx_ring
.layout
.tp_frame_nr
)
376 if (unlikely(sigint
== 1))
379 if (frame_count_max
!= 0) {
380 if (ctx
->tx_packets
>= frame_count_max
) {
389 bug_on(gettimeofday(&end
, NULL
));
390 timersub(&end
, &start
, &diff
);
394 bpf_release(&bpf_ops
);
396 dissector_cleanup_all();
397 destroy_tx_ring(tx_sock
, &tx_ring
);
400 leave_rfmon_mac80211(ctx
->device_out
);
402 if (__pcap_io
->prepare_close_pcap
)
403 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_RD
);
405 if (!strncmp("-", ctx
->device_in
, strlen("-")))
406 dup2(fd
, fileno(stdin
));
413 printf("\r%12lu packets outgoing\n", ctx
->tx_packets
);
414 printf("\r%12lu packets truncated in file\n", trunced
);
415 printf("\r%12lu bytes outgoing\n", ctx
->tx_bytes
);
416 printf("\r%12lu sec, %lu usec in total\n", diff
.tv_sec
, diff
.tv_usec
);
419 static inline bool __skip_packet(struct ctx
*ctx
, struct sockaddr_ll
*sll
)
421 if (ctx
->packet_type
!= -1)
422 return ctx
->packet_type
!= sll
->sll_pkttype
;
424 /* when receving from the loopback device, each packet is seen twice,
425 * so drop the outgoing ones to avoid duplicates
427 return (sll
->sll_ifindex
== ctx
->lo_ifindex
) &&
428 (sll
->sll_pkttype
== PACKET_OUTGOING
);
431 static inline bool skip_packet(struct ctx
*ctx
, struct sockaddr_ll
*sll
)
433 bool skip
= __skip_packet(ctx
, sll
);
436 ctx
->pkts_skipd_last
++;
440 static void receive_to_xmit(struct ctx
*ctx
)
444 int rx_sock
, ifindex_in
, ifindex_out
, ret
;
445 size_t size_in
, size_out
;
446 unsigned int it_in
= 0, it_out
= 0;
447 struct frame_map
*hdr_in
, *hdr_out
;
448 struct ring tx_ring
, rx_ring
;
449 struct pollfd rx_poll
;
450 struct sock_fprog bpf_ops
;
452 if (!strncmp(ctx
->device_in
, ctx
->device_out
, IFNAMSIZ
))
453 panic("Ingress/egress devices must be different!\n");
454 if (!device_up_and_running(ctx
->device_out
))
455 panic("Egress device not up and running!\n");
457 rx_sock
= pf_socket();
458 tx_sock
= pf_socket();
460 ifindex_in
= device_ifindex(ctx
->device_in
);
461 ifindex_out
= device_ifindex(ctx
->device_out
);
463 size_in
= ring_size(ctx
->device_in
, ctx
->reserve_size
);
464 size_out
= ring_size(ctx
->device_out
, ctx
->reserve_size
);
466 enable_kernel_bpf_jit_compiler();
468 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
470 bpf_dump_all(&bpf_ops
);
471 bpf_attach_to_sock(rx_sock
, &bpf_ops
);
473 ring_rx_setup(&rx_ring
, rx_sock
, size_in
, ifindex_in
, &rx_poll
, false, ctx
->jumbo
,
474 ctx
->verbose
, ctx
->fanout_group
, ctx
->fanout_type
);
475 ring_tx_setup(&tx_ring
, tx_sock
, size_out
, ifindex_out
, ctx
->jumbo
, ctx
->verbose
);
477 dissector_init_all(ctx
->print_mode
);
479 if (ctx
->promiscuous
)
480 ifflags
= device_enter_promiscuous_mode(ctx
->device_in
);
483 interval
= ctx
->kpull
;
485 set_itimer_interval_value(&itimer
, 0, interval
);
486 setitimer(ITIMER_REAL
, &itimer
, NULL
);
488 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
490 printf("Running! Hang up with ^C!\n\n");
493 while (likely(sigint
== 0)) {
494 while (user_may_pull_from_rx(rx_ring
.frames
[it_in
].iov_base
)) {
495 hdr_in
= rx_ring
.frames
[it_in
].iov_base
;
496 in
= ((uint8_t *) hdr_in
) + hdr_in
->tp_h
.tp_mac
;
498 if (skip_packet(ctx
, &hdr_in
->s_ll
))
503 hdr_out
= tx_ring
.frames
[it_out
].iov_base
;
504 out
= ((uint8_t *) hdr_out
) + TPACKET2_HDRLEN
- sizeof(struct sockaddr_ll
);
506 while (!user_may_pull_from_tx(tx_ring
.frames
[it_out
].iov_base
) &&
509 next_rnd_slot(&it_out
, &tx_ring
);
512 if (it_out
>= tx_ring
.layout
.tp_frame_nr
)
516 hdr_out
= tx_ring
.frames
[it_out
].iov_base
;
517 out
= ((uint8_t *) hdr_out
) + TPACKET2_HDRLEN
- sizeof(struct sockaddr_ll
);
520 tpacket_hdr_clone(&hdr_out
->tp_h
, &hdr_in
->tp_h
);
521 memcpy(out
, in
, hdr_in
->tp_h
.tp_len
);
523 kernel_may_pull_from_tx(&hdr_out
->tp_h
);
525 next_rnd_slot(&it_out
, &tx_ring
);
528 if (it_out
>= tx_ring
.layout
.tp_frame_nr
)
532 show_frame_hdr(in
, hdr_in
->tp_h
.tp_snaplen
,
533 ctx
->link_type
, hdr_in
, ctx
->print_mode
,
536 dissector_entry_point(in
, hdr_in
->tp_h
.tp_snaplen
,
537 ctx
->link_type
, ctx
->print_mode
,
540 if (frame_count_max
!= 0) {
541 if (ctx
->pkts_seen
>= frame_count_max
) {
548 kernel_may_pull_from_rx(&hdr_in
->tp_h
);
551 if (it_in
>= rx_ring
.layout
.tp_frame_nr
)
554 if (unlikely(sigint
== 1))
558 ret
= poll(&rx_poll
, 1, -1);
559 if (unlikely(ret
< 0)) {
561 panic("Poll failed!\n");
568 dump_rx_stats(ctx
, rx_sock
, false);
570 bpf_release(&bpf_ops
);
572 dissector_cleanup_all();
574 destroy_tx_ring(tx_sock
, &tx_ring
);
575 destroy_rx_ring(rx_sock
, &rx_ring
);
577 if (ctx
->promiscuous
)
578 device_leave_promiscuous_mode(ctx
->device_in
, ifflags
);
584 static void translate_pcap_to_txf(int fdo
, uint8_t *out
, size_t len
)
586 size_t bytes_done
= 0;
589 slprintf(bout
, sizeof(bout
), "{\n ");
590 write_or_die(fdo
, bout
, strlen(bout
));
592 while (bytes_done
< len
) {
593 slprintf(bout
, sizeof(bout
), "0x%02x,", out
[bytes_done
]);
594 write_or_die(fdo
, bout
, strlen(bout
));
598 if (bytes_done
% 10 == 0) {
599 slprintf(bout
, sizeof(bout
), "\n");
600 write_or_die(fdo
, bout
, strlen(bout
));
602 if (bytes_done
< len
) {
603 slprintf(bout
, sizeof(bout
), " ");
604 write_or_die(fdo
, bout
, strlen(bout
));
606 } else if (bytes_done
< len
) {
607 slprintf(bout
, sizeof(bout
), " ");
608 write_or_die(fdo
, bout
, strlen(bout
));
611 if (bytes_done
% 10 != 0) {
612 slprintf(bout
, sizeof(bout
), "\n");
613 write_or_die(fdo
, bout
, strlen(bout
));
616 slprintf(bout
, sizeof(bout
), "}\n\n");
617 write_or_die(fdo
, bout
, strlen(bout
));
620 static void read_pcap(struct ctx
*ctx
)
623 int ret
, fd
, fdo
= 0;
624 unsigned long trunced
= 0;
627 struct sock_fprog bpf_ops
;
629 struct timeval start
, end
, diff
;
630 bool is_out_pcap
= ctx
->device_out
&& strstr(ctx
->device_out
, ".pcap");
631 const struct pcap_file_ops
*pcap_out_ops
= pcap_ops
[PCAP_OPS_RW
];
635 if (!strncmp("-", ctx
->device_in
, strlen("-"))) {
636 fd
= dup_or_die(fileno(stdin
));
637 close(fileno(stdin
));
638 if (ctx
->pcap
== PCAP_OPS_MM
)
639 ctx
->pcap
= PCAP_OPS_SG
;
641 /* O_NOATIME requires privileges, in case we don't have
642 * them, retry without them at a minor cost of updating
643 * atime in case the fs has been mounted as such.
645 fd
= open(ctx
->device_in
, O_RDONLY
| O_LARGEFILE
| O_NOATIME
);
646 if (fd
< 0 && errno
== EPERM
)
647 fd
= open_or_die(ctx
->device_in
, O_RDONLY
| O_LARGEFILE
);
649 panic("Cannot open file %s! %s.\n", ctx
->device_in
,
653 if (__pcap_io
->init_once_pcap
)
654 __pcap_io
->init_once_pcap(false);
656 ret
= __pcap_io
->pull_fhdr_pcap(fd
, &ctx
->magic
, &ctx
->link_type
);
658 panic("Error reading pcap header!\n");
660 if (__pcap_io
->prepare_access_pcap
) {
661 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_RD
, ctx
->jumbo
);
663 panic("Error prepare reading pcap!\n");
666 memset(&fm
, 0, sizeof(fm
));
668 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
670 bpf_dump_all(&bpf_ops
);
672 dissector_init_all(ctx
->print_mode
);
674 out_len
= round_up(1024 * 1024, RUNTIME_PAGE_SIZE
);
675 out
= xmalloc_aligned(out_len
, CO_CACHE_LINE_SIZE
);
677 if (ctx
->device_out
) {
678 if (!strncmp("-", ctx
->device_out
, strlen("-"))) {
679 fdo
= dup_or_die(fileno(stdout
));
680 close(fileno(stdout
));
682 fdo
= open_or_die_m(ctx
->device_out
, O_RDWR
| O_CREAT
|
683 O_TRUNC
| O_LARGEFILE
, DEFFILEMODE
);
688 ret
= pcap_out_ops
->push_fhdr_pcap(fdo
, ctx
->magic
,
691 panic("Error writing pcap header!\n");
694 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
696 printf("Running! Hang up with ^C!\n\n");
699 bug_on(gettimeofday(&start
, NULL
));
701 while (likely(sigint
== 0)) {
703 ret
= __pcap_io
->read_pcap(fd
, &phdr
, ctx
->magic
,
705 if (unlikely(ret
< 0))
708 if (unlikely(pcap_get_length(&phdr
, ctx
->magic
) == 0)) {
713 if (unlikely(pcap_get_length(&phdr
, ctx
->magic
) > out_len
)) {
714 pcap_set_length(&phdr
, ctx
->magic
, out_len
);
717 } while (ctx
->filter
&&
718 !bpf_run_filter(&bpf_ops
, out
,
719 pcap_get_length(&phdr
, ctx
->magic
)));
721 pcap_pkthdr_to_tpacket_hdr(&phdr
, ctx
->magic
, &fm
.tp_h
, &fm
.s_ll
);
723 ctx
->tx_bytes
+= fm
.tp_h
.tp_len
;
726 show_frame_hdr(out
, fm
.tp_h
.tp_snaplen
, ctx
->link_type
, &fm
,
727 ctx
->print_mode
, ctx
->tx_packets
);
729 dissector_entry_point(out
, fm
.tp_h
.tp_snaplen
,
730 ctx
->link_type
, ctx
->print_mode
,
734 size_t pcap_len
= pcap_get_length(&phdr
, ctx
->magic
);
735 int wlen
= pcap_out_ops
->write_pcap(fdo
, &phdr
,
738 if (unlikely(wlen
!= (int)pcap_get_total_length(&phdr
, ctx
->magic
)))
739 panic("Error writing to pcap!\n");
740 } else if (ctx
->device_out
) {
741 translate_pcap_to_txf(fdo
, out
, fm
.tp_h
.tp_snaplen
);
744 if (frame_count_max
!= 0) {
745 if (ctx
->tx_packets
>= frame_count_max
) {
753 bug_on(gettimeofday(&end
, NULL
));
754 timersub(&end
, &start
, &diff
);
756 bpf_release(&bpf_ops
);
758 dissector_cleanup_all();
760 if (__pcap_io
->prepare_close_pcap
)
761 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_RD
);
767 printf("\r%12lu packets outgoing\n", ctx
->tx_packets
);
768 printf("\r%12lu packets truncated in file\n", trunced
);
769 printf("\r%12lu bytes outgoing\n", ctx
->tx_bytes
);
770 printf("\r%12lu sec, %lu usec in total\n", diff
.tv_sec
, diff
.tv_usec
);
772 if (!strncmp("-", ctx
->device_in
, strlen("-")))
773 dup2(fd
, fileno(stdin
));
776 if (ctx
->device_out
) {
777 if (!strncmp("-", ctx
->device_out
, strlen("-")))
778 dup2(fdo
, fileno(stdout
));
783 static void generate_multi_pcap_filename(struct ctx
*ctx
, char *fname
, size_t size
, time_t ftime
)
785 if (ctx
->overwrite_interval
> 0) {
786 slprintf(fname
, size
, "%s/%s%010lu.pcap", ctx
->device_out
,
787 ctx
->prefix
? : "dump-", ctx
->file_number
);
791 if (ctx
->file_number
>= ctx
->overwrite_interval
)
792 ctx
->file_number
= 0;
794 slprintf(fname
, size
, "%s/%s%lu.pcap", ctx
->device_out
,
795 ctx
->prefix
? : "dump-", ftime
);
799 static void finish_multi_pcap_file(struct ctx
*ctx
, int fd
)
801 __pcap_io
->fsync_pcap(fd
);
803 if (__pcap_io
->prepare_close_pcap
)
804 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_WR
);
808 memset(&itimer
, 0, sizeof(itimer
));
809 setitimer(ITIMER_REAL
, &itimer
, NULL
);
812 static int next_multi_pcap_file(struct ctx
*ctx
, int fd
)
815 char fname
[PATH_MAX
] = {0};
818 __pcap_io
->fsync_pcap(fd
);
820 if (__pcap_io
->prepare_close_pcap
)
821 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_WR
);
825 if (sighup_time
> 0) {
826 ftime
= (time_t)(start_time
+ sighup_time
);
831 generate_multi_pcap_filename(ctx
, fname
, sizeof(fname
), ftime
);
833 fd
= open_or_die_m(fname
, O_RDWR
| O_CREAT
| O_TRUNC
|
834 O_LARGEFILE
, DEFFILEMODE
);
836 ret
= __pcap_io
->push_fhdr_pcap(fd
, ctx
->magic
, ctx
->link_type
);
838 panic("Error writing pcap header!\n");
840 if (__pcap_io
->prepare_access_pcap
) {
841 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_WR
, true);
843 panic("Error prepare writing pcap!\n");
849 static void reset_interval(struct ctx
*ctx
)
851 if (ctx
->dump_mode
== DUMP_INTERVAL_TIME
) {
852 interval
= ctx
->dump_interval
;
854 set_itimer_interval_value(&itimer
, interval
, 0);
855 setitimer(ITIMER_REAL
, &itimer
, NULL
);
861 static int begin_multi_pcap_file(struct ctx
*ctx
)
864 char fname
[PATH_MAX
] = {0};
868 if (ctx
->device_out
[strlen(ctx
->device_out
) - 1] == '/')
869 ctx
->device_out
[strlen(ctx
->device_out
) - 1] = 0;
871 generate_multi_pcap_filename(ctx
, fname
, sizeof(fname
), time(NULL
));
873 fd
= open_or_die_m(fname
, O_RDWR
| O_CREAT
| O_TRUNC
|
874 O_LARGEFILE
, DEFFILEMODE
);
876 ret
= __pcap_io
->push_fhdr_pcap(fd
, ctx
->magic
, ctx
->link_type
);
878 panic("Error writing pcap header!\n");
880 if (__pcap_io
->prepare_access_pcap
) {
881 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_WR
, true);
883 panic("Error prepare writing pcap!\n");
891 static void finish_single_pcap_file(struct ctx
*ctx
, int fd
)
893 __pcap_io
->fsync_pcap(fd
);
895 if (__pcap_io
->prepare_close_pcap
)
896 __pcap_io
->prepare_close_pcap(fd
, PCAP_MODE_WR
);
898 if (strncmp("-", ctx
->device_out
, strlen("-")))
901 dup2(fd
, fileno(stdout
));
904 static int begin_single_pcap_file(struct ctx
*ctx
)
907 char fname
[PATH_MAX
];
911 if (!strncmp("-", ctx
->device_out
, strlen("-"))) {
912 fd
= dup_or_die(fileno(stdout
));
913 close(fileno(stdout
));
914 if (ctx
->pcap
== PCAP_OPS_MM
)
915 ctx
->pcap
= PCAP_OPS_SG
;
922 panic("time() failed\n");
926 panic("localtime() failed\n");
928 strftime(fname
, sizeof(fname
), ctx
->device_out
, ltm
);
930 fd
= open_or_die_m(fname
,
931 O_RDWR
| O_CREAT
| O_TRUNC
|
932 O_LARGEFILE
, DEFFILEMODE
);
935 ret
= __pcap_io
->push_fhdr_pcap(fd
, ctx
->magic
, ctx
->link_type
);
937 panic("Error writing pcap header!\n");
939 if (__pcap_io
->prepare_access_pcap
) {
940 ret
= __pcap_io
->prepare_access_pcap(fd
, PCAP_MODE_WR
, true);
942 panic("Error prepare writing pcap!\n");
948 static void update_pcap_next_dump(struct ctx
*ctx
, unsigned long snaplen
,
949 int *fd
, int sock
, bool is_v3
)
951 if (!dump_to_pcap(ctx
))
954 if (ctx
->dump_mode
== DUMP_INTERVAL_SIZE
) {
956 if (interval
> ctx
->dump_interval
) {
964 printf("SIGHUP received, prematurely rotating pcap\n");
971 *fd
= next_multi_pcap_file(ctx
, *fd
);
974 if (update_rx_stats(ctx
, sock
, is_v3
))
977 if (ctx
->verbose
&& ctx
->print_mode
== PRINT_NONE
)
978 printf(".(+%"PRIu64
"/-%"PRIu64
")",
979 ctx
->pkts_recvd_last
- ctx
->pkts_drops_last
,
980 ctx
->pkts_drops_last
);
985 static void walk_t3_block(struct block_desc
*pbd
, struct ctx
*ctx
,
988 int num_pkts
= pbd
->h1
.num_pkts
, i
;
989 struct tpacket3_hdr
*hdr
;
990 struct sockaddr_ll
*sll
;
992 hdr
= (void *) ((uint8_t *) pbd
+ pbd
->h1
.offset_to_first_pkt
);
993 sll
= (void *) ((uint8_t *) hdr
+ TPACKET_ALIGN(sizeof(*hdr
)));
995 for (i
= 0; i
< num_pkts
&& likely(sigint
== 0); ++i
) {
996 uint8_t *packet
= ((uint8_t *) hdr
+ hdr
->tp_mac
);
999 if (skip_packet(ctx
, sll
))
1004 if (dump_to_pcap(ctx
)) {
1007 tpacket3_hdr_to_pcap_pkthdr(hdr
, sll
, &phdr
, ctx
->magic
);
1009 ret
= __pcap_io
->write_pcap(*fd
, &phdr
, ctx
->magic
, packet
,
1010 pcap_get_length(&phdr
, ctx
->magic
));
1011 if (unlikely(ret
!= (int) pcap_get_total_length(&phdr
, ctx
->magic
)))
1012 panic("Write error to pcap!\n");
1015 __show_frame_hdr(packet
, hdr
->tp_snaplen
, ctx
->link_type
, sll
,
1016 hdr
, ctx
->print_mode
, true, ctx
->pkts_seen
);
1018 dissector_entry_point(packet
, hdr
->tp_snaplen
, ctx
->link_type
,
1019 ctx
->print_mode
, sll
);
1021 hdr
= (void *) ((uint8_t *) hdr
+ hdr
->tp_next_offset
);
1022 sll
= (void *) ((uint8_t *) hdr
+ TPACKET_ALIGN(sizeof(*hdr
)));
1024 if (frame_count_max
!= 0) {
1025 if (unlikely(ctx
->pkts_seen
>= frame_count_max
)) {
1031 update_pcap_next_dump(ctx
, hdr
->tp_snaplen
, fd
, sock
, true);
1034 #endif /* HAVE_TPACKET3 */
1036 static void recv_only_or_dump(struct ctx
*ctx
)
1039 int sock
, ifindex
, fd
= 0, ret
;
1041 unsigned int it
= 0;
1042 struct ring rx_ring
;
1043 struct pollfd rx_poll
;
1044 struct sock_fprog bpf_ops
;
1045 struct timeval start
, end
, diff
;
1046 bool is_v3
= is_defined(HAVE_TPACKET3
);
1048 sock
= pf_socket_type(ctx
->link_type
);
1050 ifindex
= device_ifindex(ctx
->device_in
);
1051 size
= ring_size(ctx
->device_in
, ctx
->reserve_size
);
1053 enable_kernel_bpf_jit_compiler();
1055 bpf_parse_rules(ctx
->filter
, &bpf_ops
, ctx
->link_type
);
1057 bpf_dump_all(&bpf_ops
);
1058 bpf_attach_to_sock(sock
, &bpf_ops
);
1060 if (ctx
->hwtimestamp
) {
1061 ret
= set_sockopt_hwtimestamp(sock
, ctx
->device_in
);
1062 if (ret
== 0 && ctx
->verbose
)
1063 printf("HW timestamping enabled\n");
1066 ring_rx_setup(&rx_ring
, sock
, size
, ifindex
, &rx_poll
, is_v3
, true,
1067 ctx
->verbose
, ctx
->fanout_group
, ctx
->fanout_type
);
1069 dissector_init_all(ctx
->print_mode
);
1071 if (ctx
->cpu
>= 0 && ifindex
> 0) {
1072 int irq
= device_irq_number(ctx
->device_in
);
1073 device_set_irq_affinity(irq
, ctx
->cpu
);
1076 printf("IRQ: %s:%d > CPU%d\n",
1077 ctx
->device_in
, irq
, ctx
->cpu
);
1080 if (ctx
->promiscuous
)
1081 ifflags
= device_enter_promiscuous_mode(ctx
->device_in
);
1083 if (dump_to_pcap(ctx
) && __pcap_io
->init_once_pcap
)
1084 __pcap_io
->init_once_pcap(true);
1086 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
1088 if (dump_to_pcap(ctx
)) {
1091 ret
= stat(ctx
->device_out
, &stats
);
1095 ctx
->dump_dir
= S_ISDIR(stats
.st_mode
);
1098 fd
= begin_multi_pcap_file(ctx
);
1100 fd
= begin_single_pcap_file(ctx
);
1103 printf("Running! Hang up with ^C!\n\n");
1106 bug_on(gettimeofday(&start
, NULL
));
1108 while (likely(sigint
== 0)) {
1109 #ifdef HAVE_TPACKET3
1110 struct block_desc
*pbd
;
1112 while (user_may_pull_from_rx_block((pbd
= rx_ring
.frames
[it
].iov_base
))) {
1113 walk_t3_block(pbd
, ctx
, sock
, &fd
);
1115 kernel_may_pull_from_rx_block(pbd
);
1116 it
= (it
+ 1) % rx_ring
.layout3
.tp_block_nr
;
1118 if (unlikely(sigint
== 1))
1122 while (user_may_pull_from_rx(rx_ring
.frames
[it
].iov_base
)) {
1123 struct frame_map
*hdr
= rx_ring
.frames
[it
].iov_base
;
1124 uint8_t *packet
= ((uint8_t *) hdr
) + hdr
->tp_h
.tp_mac
;
1127 if (skip_packet(ctx
, &hdr
->s_ll
))
1132 if (unlikely(ring_frame_size(&rx_ring
) < hdr
->tp_h
.tp_snaplen
)) {
1133 /* XXX: silently ignore for now. We used to
1134 * report them with dump_rx_stats() */
1138 if (dump_to_pcap(ctx
)) {
1139 tpacket_hdr_to_pcap_pkthdr(&hdr
->tp_h
, &hdr
->s_ll
, &phdr
, ctx
->magic
);
1141 ret
= __pcap_io
->write_pcap(fd
, &phdr
, ctx
->magic
, packet
,
1142 pcap_get_length(&phdr
, ctx
->magic
));
1143 if (unlikely(ret
!= (int) pcap_get_total_length(&phdr
, ctx
->magic
)))
1144 panic("Write error to pcap!\n");
1147 show_frame_hdr(packet
, hdr
->tp_h
.tp_snaplen
,
1148 ctx
->link_type
, hdr
, ctx
->print_mode
,
1151 dissector_entry_point(packet
, hdr
->tp_h
.tp_snaplen
,
1152 ctx
->link_type
, ctx
->print_mode
,
1155 if (frame_count_max
!= 0) {
1156 if (unlikely(ctx
->pkts_seen
>= frame_count_max
)) {
1163 kernel_may_pull_from_rx(&hdr
->tp_h
);
1164 it
= (it
+ 1) % rx_ring
.layout
.tp_frame_nr
;
1166 if (unlikely(sigint
== 1))
1169 update_pcap_next_dump(ctx
, hdr
->tp_h
.tp_snaplen
, &fd
,
1172 #endif /* HAVE_TPACKET3 */
1174 ret
= poll(&rx_poll
, 1, -1);
1175 if (unlikely(ret
< 0)) {
1177 panic("Poll failed!\n");
1181 bug_on(gettimeofday(&end
, NULL
));
1182 timersub(&end
, &start
, &diff
);
1184 dump_rx_stats(ctx
, sock
, is_v3
);
1185 printf("\r%12lu sec, %lu usec in total\n",
1186 diff
.tv_sec
, diff
.tv_usec
);
1188 bpf_release(&bpf_ops
);
1189 dissector_cleanup_all();
1190 destroy_rx_ring(sock
, &rx_ring
);
1192 if (ctx
->promiscuous
)
1193 device_leave_promiscuous_mode(ctx
->device_in
, ifflags
);
1196 leave_rfmon_mac80211(ctx
->device_in
);
1198 if (dump_to_pcap(ctx
)) {
1200 finish_multi_pcap_file(ctx
, fd
);
1202 finish_single_pcap_file(ctx
, fd
);
1208 static void init_ctx(struct ctx
*ctx
)
1210 memset(ctx
, 0, sizeof(*ctx
));
1212 ctx
->uid
= getuid();
1213 ctx
->gid
= getgid();
1216 ctx
->packet_type
= -1;
1218 ctx
->fanout_type
= PACKET_FANOUT_ROLLOVER
;
1220 ctx
->magic
= ORIGINAL_TCPDUMP_MAGIC
;
1221 ctx
->print_mode
= PRINT_NORM
;
1222 ctx
->pcap
= PCAP_OPS_SG
;
1224 ctx
->dump_mode
= DUMP_INTERVAL_TIME
;
1225 ctx
->dump_interval
= 60;
1227 ctx
->promiscuous
= true;
1228 ctx
->randomize
= false;
1229 ctx
->hwtimestamp
= true;
1232 static void destroy_ctx(struct ctx
*ctx
)
1234 free(ctx
->device_in
);
1235 free(ctx
->device_out
);
1236 free(ctx
->device_trans
);
1241 static void __noreturn
help(void)
1243 printf("netsniff-ng %s, the packet sniffing beast\n", VERSION_STRING
);
1244 puts("http://www.netsniff-ng.org\n\n"
1245 "Usage: netsniff-ng [options] [filter-expression]\n"
1247 " -i|-d|--dev|--in <dev|pcap|-> Input source as netdev, pcap or pcap stdin\n"
1248 " -o|--out <dev|pcap|dir|cfg|-> Output sink as netdev, pcap, directory, trafgen, or stdout\n"
1249 " -C|--fanout-group <id> Join packet fanout group\n"
1250 " -K|--fanout-type <type> Apply fanout discipline: hash|lb|cpu|rnd|roll|qm\n"
1251 " -L|--fanout-opts <opts> Additional fanout options: defrag|roll\n"
1252 " -f|--filter <bpf-file|-|expr> Use BPF filter from bpfc file/stdin or tcpdump-like expression\n"
1253 " -t|--type <type> Filter for: host|broadcast|multicast|others|outgoing\n"
1254 " -F|--interval <size|time> Dump interval if -o is a dir: <num>KiB/MiB/GiB/s/sec/min/hrs\n"
1255 " -R|--rfraw Capture or inject raw 802.11 frames\n"
1256 " -n|--num <0|uint> Number of packets until exit (def: 0)\n"
1257 " -P|--prefix <name> Prefix for pcaps stored in directory\n"
1258 " -O|--overwrite <N> Limit the number of pcaps to N (file names use numbers 0 to N-1)\n"
1259 " -T|--magic <pcap-magic> Pcap magic number/pcap format to store, see -D\n"
1260 " -w|--cooked Use Linux \"cooked\" header instead of link header\n"
1261 " -D|--dump-pcap-types Dump pcap types and magic numbers and quit\n"
1262 " -B|--dump-bpf Dump generated BPF assembly\n"
1263 " -r|--rand Randomize packet forwarding order (dev->dev)\n"
1264 " -M|--no-promisc No promiscuous mode for netdev\n"
1265 " -A|--no-sock-mem Don't tune core socket memory\n"
1266 " -N|--no-hwtimestamp Disable hardware time stamping\n"
1267 " -m|--mmap Mmap(2) pcap file I/O, e.g. for replaying pcaps\n"
1268 " -G|--sg Scatter/gather pcap file I/O\n"
1269 " -c|--clrw Use slower read(2)/write(2) I/O\n"
1270 " -S|--ring-size <size> Specify ring size to: <num>KiB/MiB/GiB\n"
1271 " -k|--kernel-pull <uint> Kernel pull from user interval in us (def: 10us)\n"
1272 " -J|--jumbo-support Support replay/fwd 64KB Super Jumbo Frames (def: 2048B)\n"
1273 " -b|--bind-cpu <cpu> Bind to specific CPU\n"
1274 " -u|--user <userid> Drop privileges and change to userid\n"
1275 " -g|--group <groupid> Drop privileges and change to groupid\n"
1276 " -H|--prio-high Make this high priority process\n"
1277 " -Q|--notouch-irq Do not touch IRQ CPU affinity of NIC\n"
1278 " -s|--silent Do not print captured packets\n"
1279 " -q|--less Print less-verbose packet information\n"
1280 " -X|--hex Print packet data in hex format\n"
1281 " -l|--ascii Print human-readable packet data\n"
1282 " -U|--update Update GeoIP databases\n"
1283 " -V|--verbose Be more verbose\n"
1284 " -v|--version Show version and exit\n"
1285 " -h|--help Guess what?!\n\n"
1287 " netsniff-ng --in eth0 --out dump.pcap -s -T 0xa1b2c3d4 --bind-cpu 0 tcp or udp\n"
1288 " netsniff-ng --in wlan0 --rfraw --out dump.pcap --silent --bind-cpu 0\n"
1289 " netsniff-ng --in dump.pcap --mmap --out eth0 -k1000 --silent --bind-cpu 0\n"
1290 " netsniff-ng --in dump.pcap --out dump.cfg --silent --bind-cpu 0\n"
1291 " netsniff-ng --in dump.pcap --out dump2.pcap --silent tcp\n"
1292 " netsniff-ng --in eth0 --out eth1 --silent --bind-cpu 0 -J --type host\n"
1293 " netsniff-ng --in eth1 --out /opt/probe/ -s -m --interval 100MiB -b 0\n"
1294 " netsniff-ng --in vlan0 --out dump.pcap -c -u `id -u bob` -g `id -g bob`\n"
1295 " netsniff-ng --in any --filter http.bpf --jumbo-support --ascii -V\n\n"
1297 " For introducing bit errors, delays with random variation and more\n"
1298 " while replaying pcaps, make use of tc(8) with its disciplines (e.g. netem).\n");
1303 static void __noreturn
version(void)
1305 printf("netsniff-ng %s, Git id: %s\n", VERSION_LONG
, GITVERSION
);
1306 puts("the packet sniffing beast\n"
1307 "http://www.netsniff-ng.org\n");
1312 int main(int argc
, char **argv
)
1315 int c
, i
, j
, cpu_tmp
, ops_touched
= 0, vals
[4] = {0};
1316 bool prio_high
= false, setsockmem
= true;
1317 void (*main_loop
)(struct ctx
*ctx
) = NULL
;
1321 start_time
= time(NULL
);
1324 while ((c
= getopt_long(argc
, argv
, short_options
, long_options
,
1329 ctx
.device_in
= xstrdup(optarg
);
1332 ctx
.device_out
= xstrdup(optarg
);
1335 ctx
.prefix
= xstrdup(optarg
);
1338 ctx
.overwrite_interval
= strtoul(optarg
, NULL
, 0);
1344 ctx
.randomize
= true;
1350 ctx
.magic
= (uint32_t) strtoul(optarg
, NULL
, 0);
1351 pcap_check_magic(ctx
.magic
);
1354 ctx
.filter
= xstrdup(optarg
);
1357 ctx
.promiscuous
= false;
1360 ctx
.hwtimestamp
= false;
1366 ctx
.uid
= strtoul(optarg
, NULL
, 0);
1370 ctx
.gid
= strtoul(optarg
, NULL
, 0);
1374 ctx
.fanout_group
= strtoul(optarg
, NULL
, 0);
1375 if (ctx
.fanout_group
== 0)
1376 panic("Non-zero fanout group id required!\n");
1379 if (!strncmp(optarg
, "hash", strlen("hash")))
1380 ctx
.fanout_type
= PACKET_FANOUT_HASH
;
1381 else if (!strncmp(optarg
, "lb", strlen("lb")) ||
1382 !strncmp(optarg
, "rr", strlen("rr")))
1383 ctx
.fanout_type
= PACKET_FANOUT_LB
;
1384 else if (!strncmp(optarg
, "cpu", strlen("cpu")))
1385 ctx
.fanout_type
= PACKET_FANOUT_CPU
;
1386 else if (!strncmp(optarg
, "rnd", strlen("rnd")))
1387 ctx
.fanout_type
= PACKET_FANOUT_RND
;
1388 else if (!strncmp(optarg
, "roll", strlen("roll")))
1389 ctx
.fanout_type
= PACKET_FANOUT_ROLLOVER
;
1390 else if (!strncmp(optarg
, "qm", strlen("qm")))
1391 ctx
.fanout_type
= PACKET_FANOUT_QM
;
1393 panic("Unknown fanout type!\n");
1396 if (!strncmp(optarg
, "defrag", strlen("defrag")))
1397 ctx
.fanout_type
|= PACKET_FANOUT_FLAG_DEFRAG
;
1398 else if (!strncmp(optarg
, "roll", strlen("roll")))
1399 ctx
.fanout_type
|= PACKET_FANOUT_FLAG_ROLLOVER
;
1401 panic("Unknown fanout option!\n");
1404 if (!strncmp(optarg
, "host", strlen("host")))
1405 ctx
.packet_type
= PACKET_HOST
;
1406 else if (!strncmp(optarg
, "broadcast", strlen("broadcast")))
1407 ctx
.packet_type
= PACKET_BROADCAST
;
1408 else if (!strncmp(optarg
, "multicast", strlen("multicast")))
1409 ctx
.packet_type
= PACKET_MULTICAST
;
1410 else if (!strncmp(optarg
, "others", strlen("others")))
1411 ctx
.packet_type
= PACKET_OTHERHOST
;
1412 else if (!strncmp(optarg
, "outgoing", strlen("outgoing")))
1413 ctx
.packet_type
= PACKET_OUTGOING
;
1415 ctx
.packet_type
= -1;
1419 for (j
= i
= strlen(optarg
); i
> 0; --i
) {
1420 if (!isdigit(optarg
[j
- i
]))
1425 if (!strncmp(ptr
, "KiB", strlen("KiB")))
1426 ctx
.reserve_size
= 1 << 10;
1427 else if (!strncmp(ptr
, "MiB", strlen("MiB")))
1428 ctx
.reserve_size
= 1 << 20;
1429 else if (!strncmp(ptr
, "GiB", strlen("GiB")))
1430 ctx
.reserve_size
= 1 << 30;
1432 panic("Syntax error in ring size param!\n");
1434 ctx
.reserve_size
*= strtoul(optarg
, NULL
, 0);
1437 cpu_tmp
= strtol(optarg
, NULL
, 0);
1439 cpu_affinity(cpu_tmp
);
1447 ctx
.pcap
= PCAP_OPS_RW
;
1451 ctx
.pcap
= PCAP_OPS_MM
;
1455 ctx
.pcap
= PCAP_OPS_SG
;
1462 ctx
.print_mode
= PRINT_NONE
;
1465 ctx
.print_mode
= PRINT_LESS
;
1469 (ctx
.print_mode
== PRINT_ASCII
) ?
1470 PRINT_HEX_ASCII
: PRINT_HEX
;
1474 (ctx
.print_mode
== PRINT_HEX
) ?
1475 PRINT_HEX_ASCII
: PRINT_ASCII
;
1478 ctx
.kpull
= strtoul(optarg
, NULL
, 0);
1481 frame_count_max
= strtoul(optarg
, NULL
, 0);
1485 for (j
= i
= strlen(optarg
); i
> 0; --i
) {
1486 if (!isdigit(optarg
[j
- i
]))
1491 if (!strncmp(ptr
, "KiB", strlen("KiB"))) {
1492 ctx
.dump_interval
= 1 << 10;
1493 ctx
.dump_mode
= DUMP_INTERVAL_SIZE
;
1494 } else if (!strncmp(ptr
, "MiB", strlen("MiB"))) {
1495 ctx
.dump_interval
= 1 << 20;
1496 ctx
.dump_mode
= DUMP_INTERVAL_SIZE
;
1497 } else if (!strncmp(ptr
, "GiB", strlen("GiB"))) {
1498 ctx
.dump_interval
= 1 << 30;
1499 ctx
.dump_mode
= DUMP_INTERVAL_SIZE
;
1500 } else if (!strncmp(ptr
, "sec", strlen("sec"))) {
1501 ctx
.dump_interval
= 1;
1502 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1503 } else if (!strncmp(ptr
, "min", strlen("min"))) {
1504 ctx
.dump_interval
= 60;
1505 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1506 } else if (!strncmp(ptr
, "hrs", strlen("hrs"))) {
1507 ctx
.dump_interval
= 60 * 60;
1508 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1509 } else if (!strncmp(ptr
, "s", strlen("s"))) {
1510 ctx
.dump_interval
= 1;
1511 ctx
.dump_mode
= DUMP_INTERVAL_TIME
;
1513 panic("Syntax error in time/size param!\n");
1516 ctx
.dump_interval
*= strtoul(optarg
, NULL
, 0);
1522 ctx
.dump_bpf
= true;
1525 pcap_dump_type_features();
1533 ctx
.link_type
= LINKTYPE_LINUX_SLL
;
1559 panic("Option -%c requires an argument!\n",
1562 if (isprint(optopt
))
1563 printf("Unknown option character `0x%X\'!\n", optopt
);
1571 if (!ctx
.filter
&& optind
!= argc
)
1572 ctx
.filter
= argv2str(optind
, argc
, argv
);
1575 ctx
.device_in
= xstrdup("any");
1577 if (!strcmp(ctx
.device_in
, "any") || !strcmp(ctx
.device_in
, "lo"))
1578 ctx
.lo_ifindex
= device_ifindex("lo");
1580 register_signal(SIGINT
, signal_handler
);
1581 register_signal(SIGQUIT
, signal_handler
);
1582 register_signal(SIGTERM
, signal_handler
);
1583 register_signal(SIGHUP
, signal_handler
);
1589 set_sched_status(SCHED_FIFO
, sched_get_priority_max(SCHED_FIFO
));
1592 if (device_mtu(ctx
.device_in
) || !strncmp("any", ctx
.device_in
, strlen(ctx
.device_in
))) {
1594 setup_rfmon_mac80211_dev(&ctx
, &ctx
.device_in
);
1597 ctx
.link_type
= pcap_dev_to_linktype(ctx
.device_in
);
1598 if (link_has_sll_hdr(ctx
.link_type
)) {
1599 switch (ctx
.magic
) {
1600 case ORIGINAL_TCPDUMP_MAGIC
:
1601 ctx
.magic
= ORIGINAL_TCPDUMP_MAGIC_LL
;
1603 case NSEC_TCPDUMP_MAGIC
:
1604 ctx
.magic
= NSEC_TCPDUMP_MAGIC_LL
;
1606 case ___constant_swab32(ORIGINAL_TCPDUMP_MAGIC
):
1607 ctx
.magic
= ___constant_swab32(ORIGINAL_TCPDUMP_MAGIC_LL
);
1609 case ___constant_swab32(NSEC_TCPDUMP_MAGIC
):
1610 ctx
.magic
= ___constant_swab32(NSEC_TCPDUMP_MAGIC_LL
);
1616 if (!ctx
.device_out
) {
1618 main_loop
= recv_only_or_dump
;
1619 } else if (device_mtu(ctx
.device_out
)) {
1620 register_signal_f(SIGALRM
, timer_elapsed
, SA_SIGINFO
);
1621 main_loop
= receive_to_xmit
;
1624 register_signal_f(SIGALRM
, timer_next_dump
, SA_SIGINFO
);
1625 main_loop
= recv_only_or_dump
;
1627 ctx
.pcap
= PCAP_OPS_SG
;
1630 if (ctx
.device_out
&& device_mtu(ctx
.device_out
)) {
1631 register_signal_f(SIGALRM
, timer_elapsed
, SA_SIGINFO
);
1632 main_loop
= pcap_to_xmit
;
1634 ctx
.pcap
= PCAP_OPS_MM
;
1637 main_loop
= read_pcap
;
1639 ctx
.pcap
= PCAP_OPS_SG
;
1647 set_system_socket_memory(vals
, array_size(vals
));
1652 printf("pcap file I/O method: %s\n", pcap_ops_group_to_str
[ctx
.pcap
]);
1659 reset_system_socket_memory(vals
, array_size(vals
));
1662 device_restore_irq_affinity_list();