libpcap  1.10.1
About: libpcap is a packet filter library used by tools like tcpdump.
  Fossies Dox: libpcap-1.10.1.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

pcap-dag.c
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1 /*
2  * pcap-dag.c: Packet capture interface for Endace DAG cards.
3  *
4  * Authors: Richard Littin, Sean Irvine ({richard,sean}@reeltwo.com)
5  * Modifications: Jesper Peterson
6  * Koryn Grant
7  * Stephen Donnelly <stephen.donnelly@endace.com>
8  */
9 
10 #ifdef HAVE_CONFIG_H
11 #include <config.h>
12 #endif
13 
14 #include <sys/param.h> /* optionally get BSD define */
15 
16 #include <stdlib.h>
17 #include <string.h>
18 #include <errno.h>
19 
20 #include "pcap-int.h"
21 
22 #include <netinet/in.h>
23 #include <sys/mman.h>
24 #include <sys/socket.h>
25 #include <sys/types.h>
26 #include <unistd.h>
27 
28 struct mbuf; /* Squelch compiler warnings on some platforms for */
29 struct rtentry; /* declarations in <net/if.h> */
30 #include <net/if.h>
31 
32 #include "dagnew.h"
33 #include "dagapi.h"
34 #include "dagpci.h"
35 #include "dag_config_api.h"
36 
37 #include "pcap-dag.h"
38 
39 /*
40  * DAG devices have names beginning with "dag", followed by a number
41  * from 0 to DAG_MAX_BOARDS, then optionally a colon and a stream number
42  * from 0 to DAG_STREAM_MAX.
43  */
44 #ifndef DAG_MAX_BOARDS
45 #define DAG_MAX_BOARDS 32
46 #endif
47 
48 
49 #ifndef ERF_TYPE_AAL5
50 #define ERF_TYPE_AAL5 4
51 #endif
52 
53 #ifndef ERF_TYPE_MC_HDLC
54 #define ERF_TYPE_MC_HDLC 5
55 #endif
56 
57 #ifndef ERF_TYPE_MC_RAW
58 #define ERF_TYPE_MC_RAW 6
59 #endif
60 
61 #ifndef ERF_TYPE_MC_ATM
62 #define ERF_TYPE_MC_ATM 7
63 #endif
64 
65 #ifndef ERF_TYPE_MC_RAW_CHANNEL
66 #define ERF_TYPE_MC_RAW_CHANNEL 8
67 #endif
68 
69 #ifndef ERF_TYPE_MC_AAL5
70 #define ERF_TYPE_MC_AAL5 9
71 #endif
72 
73 #ifndef ERF_TYPE_COLOR_HDLC_POS
74 #define ERF_TYPE_COLOR_HDLC_POS 10
75 #endif
76 
77 #ifndef ERF_TYPE_COLOR_ETH
78 #define ERF_TYPE_COLOR_ETH 11
79 #endif
80 
81 #ifndef ERF_TYPE_MC_AAL2
82 #define ERF_TYPE_MC_AAL2 12
83 #endif
84 
85 #ifndef ERF_TYPE_IP_COUNTER
86 #define ERF_TYPE_IP_COUNTER 13
87 #endif
88 
89 #ifndef ERF_TYPE_TCP_FLOW_COUNTER
90 #define ERF_TYPE_TCP_FLOW_COUNTER 14
91 #endif
92 
93 #ifndef ERF_TYPE_DSM_COLOR_HDLC_POS
94 #define ERF_TYPE_DSM_COLOR_HDLC_POS 15
95 #endif
96 
97 #ifndef ERF_TYPE_DSM_COLOR_ETH
98 #define ERF_TYPE_DSM_COLOR_ETH 16
99 #endif
100 
101 #ifndef ERF_TYPE_COLOR_MC_HDLC_POS
102 #define ERF_TYPE_COLOR_MC_HDLC_POS 17
103 #endif
104 
105 #ifndef ERF_TYPE_AAL2
106 #define ERF_TYPE_AAL2 18
107 #endif
108 
109 #ifndef ERF_TYPE_COLOR_HASH_POS
110 #define ERF_TYPE_COLOR_HASH_POS 19
111 #endif
112 
113 #ifndef ERF_TYPE_COLOR_HASH_ETH
114 #define ERF_TYPE_COLOR_HASH_ETH 20
115 #endif
116 
117 #ifndef ERF_TYPE_INFINIBAND
118 #define ERF_TYPE_INFINIBAND 21
119 #endif
120 
121 #ifndef ERF_TYPE_IPV4
122 #define ERF_TYPE_IPV4 22
123 #endif
124 
125 #ifndef ERF_TYPE_IPV6
126 #define ERF_TYPE_IPV6 23
127 #endif
128 
129 #ifndef ERF_TYPE_RAW_LINK
130 #define ERF_TYPE_RAW_LINK 24
131 #endif
132 
133 #ifndef ERF_TYPE_INFINIBAND_LINK
134 #define ERF_TYPE_INFINIBAND_LINK 25
135 #endif
136 
137 #ifndef ERF_TYPE_META
138 #define ERF_TYPE_META 27
139 #endif
140 
141 #ifndef ERF_TYPE_PAD
142 #define ERF_TYPE_PAD 48
143 #endif
144 
145 #define ATM_CELL_SIZE 52
146 #define ATM_HDR_SIZE 4
147 
148 /*
149  * A header containing additional MTP information.
150  */
151 #define MTP2_SENT_OFFSET 0 /* 1 byte */
152 #define MTP2_ANNEX_A_USED_OFFSET 1 /* 1 byte */
153 #define MTP2_LINK_NUMBER_OFFSET 2 /* 2 bytes */
154 #define MTP2_HDR_LEN 4 /* length of the header */
155 
156 #define MTP2_ANNEX_A_NOT_USED 0
157 #define MTP2_ANNEX_A_USED 1
158 #define MTP2_ANNEX_A_USED_UNKNOWN 2
159 
160 /* SunATM pseudo header */
161 struct sunatm_hdr {
162  unsigned char flags; /* destination and traffic type */
163  unsigned char vpi; /* VPI */
164  unsigned short vci; /* VCI */
165 };
166 
167 /*
168  * Private data for capturing on DAG devices.
169  */
170 struct pcap_dag {
171  struct pcap_stat stat;
172  u_char *dag_mem_bottom; /* DAG card current memory bottom pointer */
173  u_char *dag_mem_top; /* DAG card current memory top pointer */
174  int dag_fcs_bits; /* Number of checksum bits from link layer */
175  int dag_flags; /* Flags */
176  int dag_stream; /* DAG stream number */
177  int dag_timeout; /* timeout specified to pcap_open_live.
178  * Same as in linux above, introduce
179  * generally? */
180  dag_card_ref_t dag_ref; /* DAG Configuration/Status API card reference */
181  dag_component_t dag_root; /* DAG CSAPI Root component */
182  attr_uuid_t drop_attr; /* DAG Stream Drop Attribute handle, if available */
183  struct timeval required_select_timeout;
184  /* Timeout caller must use in event loops */
185 };
186 
187 typedef struct pcap_dag_node {
190  pid_t pid;
192 
193 static pcap_dag_node_t *pcap_dags = NULL;
195 static const unsigned short endian_test_word = 0x0100;
196 
197 #define IS_BIGENDIAN() (*((unsigned char *)&endian_test_word))
198 
199 #define MAX_DAG_PACKET 65536
200 
201 static unsigned char TempPkt[MAX_DAG_PACKET];
202 
203 #ifndef HAVE_DAG_LARGE_STREAMS_API
204 #define dag_attach_stream64(a, b, c, d) dag_attach_stream(a, b, c, d)
205 #define dag_get_stream_poll64(a, b, c, d, e) dag_get_stream_poll(a, b, c, d, e)
206 #define dag_set_stream_poll64(a, b, c, d, e) dag_set_stream_poll(a, b, c, d, e)
207 #define dag_size_t uint32_t
208 #endif
209 
210 static int dag_stats(pcap_t *p, struct pcap_stat *ps);
211 static int dag_set_datalink(pcap_t *p, int dlt);
212 static int dag_get_datalink(pcap_t *p);
213 static int dag_setnonblock(pcap_t *p, int nonblock);
214 
215 static void
217 {
218  pcap_dag_node_t *curr = NULL, *prev = NULL;
219 
220  for (prev = NULL, curr = pcap_dags; curr != NULL && curr->p != p; prev = curr, curr = curr->next) {
221  /* empty */
222  }
223 
224  if (curr != NULL && curr->p == p) {
225  if (prev != NULL) {
226  prev->next = curr->next;
227  } else {
228  pcap_dags = curr->next;
229  }
230  }
231 }
232 
233 /*
234  * Performs a graceful shutdown of the DAG card, frees dynamic memory held
235  * in the pcap_t structure, and closes the file descriptor for the DAG card.
236  */
237 
238 static void
240 {
241  struct pcap_dag *pd = p->priv;
242 
243  if(dag_stop_stream(p->fd, pd->dag_stream) < 0)
244  fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
245 
246  if(dag_detach_stream(p->fd, pd->dag_stream) < 0)
247  fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
248 
249  if(pd->dag_ref != NULL) {
250  dag_config_dispose(pd->dag_ref);
251  /*
252  * Note: we don't need to call close(p->fd) or
253  * dag_close(p->fd), as dag_config_dispose(pd->dag_ref)
254  * does this.
255  *
256  * Set p->fd to -1 to make sure that's not done.
257  */
258  p->fd = -1;
259  pd->dag_ref = NULL;
260  }
261  delete_pcap_dag(p);
263 }
264 
265 static void
267 {
268  while (pcap_dags != NULL) {
269  if (pcap_dags->pid == getpid()) {
270  if (pcap_dags->p != NULL)
272  } else {
274  }
275  }
276 }
277 
278 static int
280 {
281  pcap_dag_node_t *node = NULL;
282 
283  if ((node = malloc(sizeof(pcap_dag_node_t))) == NULL) {
284  return -1;
285  }
286 
288  atexit(atexit_handler);
290  }
291 
292  node->next = pcap_dags;
293  node->p = p;
294  node->pid = getpid();
295 
296  pcap_dags = node;
297 
298  return 0;
299 }
300 
301 static unsigned int
302 dag_erf_ext_header_count(uint8_t * erf, size_t len)
303 {
304  uint32_t hdr_num = 0;
305  uint8_t hdr_type;
306 
307  /* basic sanity checks */
308  if ( erf == NULL )
309  return 0;
310  if ( len < 16 )
311  return 0;
312 
313  /* check if we have any extension headers */
314  if ( (erf[8] & 0x80) == 0x00 )
315  return 0;
316 
317  /* loop over the extension headers */
318  do {
319 
320  /* sanity check we have enough bytes */
321  if ( len < (24 + (hdr_num * 8)) )
322  return hdr_num;
323 
324  /* get the header type */
325  hdr_type = erf[(16 + (hdr_num * 8))];
326  hdr_num++;
327 
328  } while ( hdr_type & 0x80 );
329 
330  return hdr_num;
331 }
332 
333 /*
334  * Read at most max_packets from the capture stream and call the callback
335  * for each of them. Returns the number of packets handled, -1 if an
336  * error occurred, or -2 if we were told to break out of the loop.
337  */
338 static int
339 dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
340 {
341  struct pcap_dag *pd = p->priv;
342  unsigned int processed = 0;
343  unsigned int nonblocking = pd->dag_flags & DAGF_NONBLOCK;
344  unsigned int num_ext_hdr = 0;
345  unsigned int ticks_per_second;
346 
347  /* Get the next bufferful of packets (if necessary). */
348  while (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size) {
349 
350  /*
351  * Has "pcap_breakloop()" been called?
352  */
353  if (p->break_loop) {
354  /*
355  * Yes - clear the flag that indicates that
356  * it has, and return -2 to indicate that
357  * we were told to break out of the loop.
358  */
359  p->break_loop = 0;
360  return -2;
361  }
362 
363  /* dag_advance_stream() will block (unless nonblock is called)
364  * until 64kB of data has accumulated.
365  * If to_ms is set, it will timeout before 64kB has accumulated.
366  * We wait for 64kB because processing a few packets at a time
367  * can cause problems at high packet rates (>200kpps) due
368  * to inefficiencies.
369  * This does mean if to_ms is not specified the capture may 'hang'
370  * for long periods if the data rate is extremely slow (<64kB/sec)
371  * If non-block is specified it will return immediately. The user
372  * is then responsible for efficiency.
373  */
374  if ( NULL == (pd->dag_mem_top = dag_advance_stream(p->fd, pd->dag_stream, &(pd->dag_mem_bottom))) ) {
375  return -1;
376  }
377 
378  if (nonblocking && (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size))
379  {
380  /* Pcap is configured to process only available packets, and there aren't any, return immediately. */
381  return 0;
382  }
383 
384  if(!nonblocking &&
385  pd->dag_timeout &&
386  (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size))
387  {
388  /* Blocking mode, but timeout set and no data has arrived, return anyway.*/
389  return 0;
390  }
391 
392  }
393 
394  /* Process the packets. */
395  while (pd->dag_mem_top - pd->dag_mem_bottom >= dag_record_size) {
396 
397  unsigned short packet_len = 0;
398  int caplen = 0;
399  struct pcap_pkthdr pcap_header;
400 
401  dag_record_t *header = (dag_record_t *)(pd->dag_mem_bottom);
402 
403  u_char *dp = ((u_char *)header); /* + dag_record_size; */
404  unsigned short rlen;
405 
406  /*
407  * Has "pcap_breakloop()" been called?
408  */
409  if (p->break_loop) {
410  /*
411  * Yes - clear the flag that indicates that
412  * it has, and return -2 to indicate that
413  * we were told to break out of the loop.
414  */
415  p->break_loop = 0;
416  return -2;
417  }
418 
419  rlen = ntohs(header->rlen);
420  if (rlen < dag_record_size)
421  {
422  pcap_strlcpy(p->errbuf, "dag_read: record too small",
424  return -1;
425  }
426  pd->dag_mem_bottom += rlen;
427 
428  /* Count lost packets. */
429  switch((header->type & 0x7f)) {
430  /* in these types the color value overwrites the lctr */
432  case ERF_TYPE_COLOR_ETH:
438  break;
439 
440  default:
441  if ( (pd->drop_attr == kNullAttributeUuid) && (header->lctr) ) {
442  pd->stat.ps_drop += ntohs(header->lctr);
443  }
444  }
445 
446  if ((header->type & 0x7f) == ERF_TYPE_PAD) {
447  continue;
448  }
449 
450  num_ext_hdr = dag_erf_ext_header_count(dp, rlen);
451 
452  /* ERF encapsulation */
453  /* The Extensible Record Format is not dropped for this kind of encapsulation,
454  * and will be handled as a pseudo header by the decoding application.
455  * The information carried in the ERF header and in the optional subheader (if present)
456  * could be merged with the libpcap information, to offer a better decoding.
457  * The packet length is
458  * o the length of the packet on the link (header->wlen),
459  * o plus the length of the ERF header (dag_record_size), as the length of the
460  * pseudo header will be adjusted during the decoding,
461  * o plus the length of the optional subheader (if present).
462  *
463  * The capture length is header.rlen and the byte stuffing for alignment will be dropped
464  * if the capture length is greater than the packet length.
465  */
466  if (p->linktype == DLT_ERF) {
467  packet_len = ntohs(header->wlen) + dag_record_size;
468  caplen = rlen;
469  switch ((header->type & 0x7f)) {
470  case ERF_TYPE_MC_AAL5:
471  case ERF_TYPE_MC_ATM:
472  case ERF_TYPE_MC_HDLC:
474  case ERF_TYPE_MC_RAW:
475  case ERF_TYPE_MC_AAL2:
477  packet_len += 4; /* MC header */
478  break;
479 
482  case ERF_TYPE_COLOR_ETH:
483  case ERF_TYPE_ETH:
484  packet_len += 2; /* ETH header */
485  break;
486  } /* switch type */
487 
488  /* Include ERF extension headers */
489  packet_len += (8 * num_ext_hdr);
490 
491  if (caplen > packet_len) {
492  caplen = packet_len;
493  }
494  } else {
495  /* Other kind of encapsulation according to the header Type */
496 
497  /* Skip over generic ERF header */
498  dp += dag_record_size;
499  /* Skip over extension headers */
500  dp += 8 * num_ext_hdr;
501 
502  switch((header->type & 0x7f)) {
503  case ERF_TYPE_ATM:
504  case ERF_TYPE_AAL5:
505  if ((header->type & 0x7f) == ERF_TYPE_AAL5) {
506  packet_len = ntohs(header->wlen);
507  caplen = rlen - dag_record_size;
508  }
509  case ERF_TYPE_MC_ATM:
510  if ((header->type & 0x7f) == ERF_TYPE_MC_ATM) {
511  caplen = packet_len = ATM_CELL_SIZE;
512  dp+=4;
513  }
514  case ERF_TYPE_MC_AAL5:
515  if ((header->type & 0x7f) == ERF_TYPE_MC_AAL5) {
516  packet_len = ntohs(header->wlen);
517  caplen = rlen - dag_record_size - 4;
518  dp+=4;
519  }
520  /* Skip over extension headers */
521  caplen -= (8 * num_ext_hdr);
522 
523  if ((header->type & 0x7f) == ERF_TYPE_ATM) {
524  caplen = packet_len = ATM_CELL_SIZE;
525  }
526  if (p->linktype == DLT_SUNATM) {
527  struct sunatm_hdr *sunatm = (struct sunatm_hdr *)dp;
528  unsigned long rawatm;
529 
530  rawatm = ntohl(*((unsigned long *)dp));
531  sunatm->vci = htons((rawatm >> 4) & 0xffff);
532  sunatm->vpi = (rawatm >> 20) & 0x00ff;
533  sunatm->flags = ((header->flags.iface & 1) ? 0x80 : 0x00) |
534  ((sunatm->vpi == 0 && sunatm->vci == htons(5)) ? 6 :
535  ((sunatm->vpi == 0 && sunatm->vci == htons(16)) ? 5 :
536  ((dp[ATM_HDR_SIZE] == 0xaa &&
537  dp[ATM_HDR_SIZE+1] == 0xaa &&
538  dp[ATM_HDR_SIZE+2] == 0x03) ? 2 : 1)));
539 
540  } else if (p->linktype == DLT_ATM_RFC1483) {
541  packet_len -= ATM_HDR_SIZE;
542  caplen -= ATM_HDR_SIZE;
543  dp += ATM_HDR_SIZE;
544  } else
545  continue;
546  break;
547 
550  case ERF_TYPE_COLOR_ETH:
551  case ERF_TYPE_ETH:
552  if ((p->linktype != DLT_EN10MB) &&
553  (p->linktype != DLT_DOCSIS))
554  continue;
555  packet_len = ntohs(header->wlen);
556  packet_len -= (pd->dag_fcs_bits >> 3);
557  caplen = rlen - dag_record_size - 2;
558  /* Skip over extension headers */
559  caplen -= (8 * num_ext_hdr);
560  if (caplen > packet_len) {
561  caplen = packet_len;
562  }
563  dp += 2;
564  break;
565 
569  case ERF_TYPE_HDLC_POS:
570  if ((p->linktype != DLT_CHDLC) &&
571  (p->linktype != DLT_PPP_SERIAL) &&
572  (p->linktype != DLT_FRELAY))
573  continue;
574  packet_len = ntohs(header->wlen);
575  packet_len -= (pd->dag_fcs_bits >> 3);
576  caplen = rlen - dag_record_size;
577  /* Skip over extension headers */
578  caplen -= (8 * num_ext_hdr);
579  if (caplen > packet_len) {
580  caplen = packet_len;
581  }
582  break;
583 
585  case ERF_TYPE_MC_HDLC:
586  if ((p->linktype != DLT_CHDLC) &&
587  (p->linktype != DLT_PPP_SERIAL) &&
588  (p->linktype != DLT_FRELAY) &&
589  (p->linktype != DLT_MTP2) &&
590  (p->linktype != DLT_MTP2_WITH_PHDR) &&
591  (p->linktype != DLT_LAPD))
592  continue;
593  packet_len = ntohs(header->wlen);
594  packet_len -= (pd->dag_fcs_bits >> 3);
595  caplen = rlen - dag_record_size - 4;
596  /* Skip over extension headers */
597  caplen -= (8 * num_ext_hdr);
598  if (caplen > packet_len) {
599  caplen = packet_len;
600  }
601  /* jump the MC_HDLC_HEADER */
602  dp += 4;
603 #ifdef DLT_MTP2_WITH_PHDR
604  if (p->linktype == DLT_MTP2_WITH_PHDR) {
605  /* Add the MTP2 Pseudo Header */
606  caplen += MTP2_HDR_LEN;
607  packet_len += MTP2_HDR_LEN;
608 
611  *(TempPkt+MTP2_LINK_NUMBER_OFFSET) = ((header->rec.mc_hdlc.mc_header>>16)&0x01);
612  *(TempPkt+MTP2_LINK_NUMBER_OFFSET+1) = ((header->rec.mc_hdlc.mc_header>>24)&0xff);
613  memcpy(TempPkt+MTP2_HDR_LEN, dp, caplen);
614  dp = TempPkt;
615  }
616 #endif
617  break;
618 
619  case ERF_TYPE_IPV4:
620  if ((p->linktype != DLT_RAW) &&
621  (p->linktype != DLT_IPV4))
622  continue;
623  packet_len = ntohs(header->wlen);
624  caplen = rlen - dag_record_size;
625  /* Skip over extension headers */
626  caplen -= (8 * num_ext_hdr);
627  if (caplen > packet_len) {
628  caplen = packet_len;
629  }
630  break;
631 
632  case ERF_TYPE_IPV6:
633  if ((p->linktype != DLT_RAW) &&
634  (p->linktype != DLT_IPV6))
635  continue;
636  packet_len = ntohs(header->wlen);
637  caplen = rlen - dag_record_size;
638  /* Skip over extension headers */
639  caplen -= (8 * num_ext_hdr);
640  if (caplen > packet_len) {
641  caplen = packet_len;
642  }
643  break;
644 
645  /* These types have no matching 'native' DLT, but can be used with DLT_ERF above */
646  case ERF_TYPE_MC_RAW:
648  case ERF_TYPE_IP_COUNTER:
650  case ERF_TYPE_INFINIBAND:
651  case ERF_TYPE_RAW_LINK:
653  default:
654  /* Unhandled ERF type.
655  * Ignore rather than generating error
656  */
657  continue;
658  } /* switch type */
659 
660  } /* ERF encapsulation */
661 
662  if (caplen > p->snapshot)
663  caplen = p->snapshot;
664 
665  /* Run the packet filter if there is one. */
666  if ((p->fcode.bf_insns == NULL) || pcap_filter(p->fcode.bf_insns, dp, packet_len, caplen)) {
667 
668  /* convert between timestamp formats */
669  register unsigned long long ts;
670 
671  if (IS_BIGENDIAN()) {
672  ts = SWAPLL(header->ts);
673  } else {
674  ts = header->ts;
675  }
676 
677  switch (p->opt.tstamp_precision) {
679  ticks_per_second = 1000000000;
680  break;
682  default:
683  ticks_per_second = 1000000;
684  break;
685 
686  }
687  pcap_header.ts.tv_sec = ts >> 32;
688  ts = (ts & 0xffffffffULL) * ticks_per_second;
689  ts += 0x80000000; /* rounding */
690  pcap_header.ts.tv_usec = ts >> 32;
691  if (pcap_header.ts.tv_usec >= ticks_per_second) {
692  pcap_header.ts.tv_usec -= ticks_per_second;
693  pcap_header.ts.tv_sec++;
694  }
695 
696  /* Fill in our own header data */
697  pcap_header.caplen = caplen;
698  pcap_header.len = packet_len;
699 
700  /* Count the packet. */
701  pd->stat.ps_recv++;
702 
703  /* Call the user supplied callback function */
704  callback(user, &pcap_header, dp);
705 
706  /* Only count packets that pass the filter, for consistency with standard Linux behaviour. */
707  processed++;
708  if (processed == cnt && !PACKET_COUNT_IS_UNLIMITED(cnt))
709  {
710  /* Reached the user-specified limit. */
711  return cnt;
712  }
713  }
714  }
715 
716  return processed;
717 }
718 
719 static int
720 dag_inject(pcap_t *p, const void *buf _U_, int size _U_)
721 {
722  pcap_strlcpy(p->errbuf, "Sending packets isn't supported on DAG cards",
724  return (-1);
725 }
726 
727 /*
728  * Get a handle for a live capture from the given DAG device. Passing a NULL
729  * device will result in a failure. The promisc flag is ignored because DAG
730  * cards are always promiscuous. The to_ms parameter is used in setting the
731  * API polling parameters.
732  *
733  * snaplen is now also ignored, until we get per-stream slen support. Set
734  * slen with approprite DAG tool BEFORE pcap_activate().
735  *
736  * See also pcap(3).
737  */
738 static int dag_activate(pcap_t* p)
739 {
740  struct pcap_dag *pd = p->priv;
741  char *s;
742  int n;
743  daginf_t* daginf;
744  char * newDev = NULL;
745  char * device = p->opt.device;
746  int ret;
747  dag_size_t mindata;
748  struct timeval maxwait;
749  struct timeval poll;
750 
751  if (device == NULL) {
752  snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "device is NULL");
753  return PCAP_ERROR;
754  }
755 
756  /* Initialize some components of the pcap structure. */
757  newDev = (char *)malloc(strlen(device) + 16);
758  if (newDev == NULL) {
759  ret = PCAP_ERROR;
761  errno, "Can't allocate string for device name");
762  goto fail;
763  }
764 
765  /* Parse input name to get dag device and stream number if provided */
766  if (dag_parse_name(device, newDev, strlen(device) + 16, &pd->dag_stream) < 0) {
767  /*
768  * XXX - it'd be nice if this indicated what was wrong
769  * with the name. Does this reliably set errno?
770  * Should this return PCAP_ERROR_NO_SUCH_DEVICE in some
771  * cases?
772  */
773  ret = PCAP_ERROR;
775  errno, "dag_parse_name");
776  goto fail;
777  }
778  device = newDev;
779 
780  if (pd->dag_stream%2) {
781  ret = PCAP_ERROR;
782  snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "dag_parse_name: tx (even numbered) streams not supported for capture");
783  goto fail;
784  }
785 
786  /* setup device parameters */
787  if((pd->dag_ref = dag_config_init((char *)device)) == NULL) {
788  /*
789  * XXX - does this reliably set errno?
790  */
791  if (errno == ENOENT)
793  else if (errno == EPERM || errno == EACCES)
795  else
796  ret = PCAP_ERROR;
798  errno, "dag_config_init %s", device);
799  goto fail;
800  }
801 
802  if((p->fd = dag_config_get_card_fd(pd->dag_ref)) < 0) {
803  /*
804  * XXX - does this reliably set errno?
805  */
806  ret = PCAP_ERROR;
808  errno, "dag_config_get_card_fd %s", device);
809  goto failclose;
810  }
811 
812  /* Open requested stream. Can fail if already locked or on error */
813  if (dag_attach_stream64(p->fd, pd->dag_stream, 0, 0) < 0) {
814  ret = PCAP_ERROR;
816  errno, "dag_attach_stream");
817  goto failclose;
818  }
819 
820  /* Try to find Stream Drop attribute */
821  pd->drop_attr = kNullAttributeUuid;
822  pd->dag_root = dag_config_get_root_component(pd->dag_ref);
823  if ( dag_component_get_subcomponent(pd->dag_root, kComponentStreamFeatures, 0) )
824  {
825  pd->drop_attr = dag_config_get_indexed_attribute_uuid(pd->dag_ref, kUint32AttributeStreamDropCount, pd->dag_stream/2);
826  }
827 
828  /* Set up default poll parameters for stream
829  * Can be overridden by pcap_set_nonblock()
830  */
831  if (dag_get_stream_poll64(p->fd, pd->dag_stream,
832  &mindata, &maxwait, &poll) < 0) {
833  ret = PCAP_ERROR;
835  errno, "dag_get_stream_poll");
836  goto faildetach;
837  }
838 
839  /* Use the poll time as the required select timeout for callers
840  * who are using select()/etc. in an event loop waiting for
841  * packets to arrive.
842  */
843  pd->required_select_timeout = poll;
845 
846  /*
847  * Turn a negative snapshot value (invalid), a snapshot value of
848  * 0 (unspecified), or a value bigger than the normal maximum
849  * value, into the maximum allowed value.
850  *
851  * If some application really *needs* a bigger snapshot
852  * length, we should just increase MAXIMUM_SNAPLEN.
853  */
854  if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
856 
857  if (p->opt.immediate) {
858  /* Call callback immediately.
859  * XXX - is this the right way to p this?
860  */
861  mindata = 0;
862  } else {
863  /* Amount of data to collect in Bytes before calling callbacks.
864  * Important for efficiency, but can introduce latency
865  * at low packet rates if to_ms not set!
866  */
867  mindata = 65536;
868  }
869 
870  /* Obey opt.timeout (was to_ms) if supplied. This is a good idea!
871  * Recommend 10-100ms. Calls will time out even if no data arrived.
872  */
873  maxwait.tv_sec = p->opt.timeout/1000;
874  maxwait.tv_usec = (p->opt.timeout%1000) * 1000;
875 
876  if (dag_set_stream_poll64(p->fd, pd->dag_stream,
877  mindata, &maxwait, &poll) < 0) {
878  ret = PCAP_ERROR;
880  errno, "dag_set_stream_poll");
881  goto faildetach;
882  }
883 
884  /* XXX Not calling dag_configure() to set slen; this is unsafe in
885  * multi-stream environments as the gpp config is global.
886  * Once the firmware provides 'per-stream slen' this can be supported
887  * again via the Config API without side-effects */
888 #if 0
889  /* set the card snap length to the specified snaplen parameter */
890  /* This is a really bad idea, as different cards have different
891  * valid slen ranges. Should fix in Config API. */
892  if (p->snapshot == 0 || p->snapshot > MAX_DAG_SNAPLEN) {
893  p->snapshot = MAX_DAG_SNAPLEN;
894  } else if (snaplen < MIN_DAG_SNAPLEN) {
895  p->snapshot = MIN_DAG_SNAPLEN;
896  }
897  /* snap len has to be a multiple of 4 */
898 #endif
899 
900  if(dag_start_stream(p->fd, pd->dag_stream) < 0) {
901  ret = PCAP_ERROR;
903  errno, "dag_start_stream %s", device);
904  goto faildetach;
905  }
906 
907  /*
908  * Important! You have to ensure bottom is properly
909  * initialized to zero on startup, it won't give you
910  * a compiler warning if you make this mistake!
911  */
912  pd->dag_mem_bottom = 0;
913  pd->dag_mem_top = 0;
914 
915  /*
916  * Find out how many FCS bits we should strip.
917  * First, query the card to see if it strips the FCS.
918  */
919  daginf = dag_info(p->fd);
920  if ((0x4200 == daginf->device_code) || (0x4230 == daginf->device_code)) {
921  /* DAG 4.2S and 4.23S already strip the FCS. Stripping the final word again truncates the packet. */
922  pd->dag_fcs_bits = 0;
923 
924  /* Note that no FCS will be supplied. */
926  } else {
927  /*
928  * Start out assuming it's 32 bits.
929  */
930  pd->dag_fcs_bits = 32;
931 
932  /* Allow an environment variable to override. */
933  if ((s = getenv("ERF_FCS_BITS")) != NULL) {
934  if ((n = atoi(s)) == 0 || n == 16 || n == 32) {
935  pd->dag_fcs_bits = n;
936  } else {
937  ret = PCAP_ERROR;
939  "pcap_activate %s: bad ERF_FCS_BITS value (%d) in environment", device, n);
940  goto failstop;
941  }
942  }
943 
944  /*
945  * Did the user request that they not be stripped?
946  */
947  if ((s = getenv("ERF_DONT_STRIP_FCS")) != NULL) {
948  /* Yes. Note the number of bytes that will be
949  supplied. */
950  p->linktype_ext = LT_FCS_DATALINK_EXT(pd->dag_fcs_bits/16);
951 
952  /* And don't strip them. */
953  pd->dag_fcs_bits = 0;
954  }
955  }
956 
957  pd->dag_timeout = p->opt.timeout;
958 
959  p->linktype = -1;
960  if (dag_get_datalink(p) < 0) {
961  ret = PCAP_ERROR;
962  goto failstop;
963  }
964 
965  p->bufsize = 0;
966 
967  if (new_pcap_dag(p) < 0) {
968  ret = PCAP_ERROR;
970  errno, "new_pcap_dag %s", device);
971  goto failstop;
972  }
973 
974  /*
975  * "select()" and "poll()" don't work on DAG device descriptors.
976  */
977  p->selectable_fd = -1;
978 
979  if (newDev != NULL) {
980  free((char *)newDev);
981  }
982 
983  p->read_op = dag_read;
984  p->inject_op = dag_inject;
986  p->setdirection_op = NULL; /* Not implemented.*/
990  p->stats_op = dag_stats;
992  pd->stat.ps_drop = 0;
993  pd->stat.ps_recv = 0;
994  pd->stat.ps_ifdrop = 0;
995  return 0;
996 
997 failstop:
998  if (dag_stop_stream(p->fd, pd->dag_stream) < 0) {
999  fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
1000  }
1001 
1002 faildetach:
1003  if (dag_detach_stream(p->fd, pd->dag_stream) < 0)
1004  fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
1005 
1006 failclose:
1007  dag_config_dispose(pd->dag_ref);
1008  /*
1009  * Note: we don't need to call close(p->fd) or dag_close(p->fd),
1010  * as dag_config_dispose(pd->dag_ref) does this.
1011  *
1012  * Set p->fd to -1 to make sure that's not done.
1013  */
1014  p->fd = -1;
1015  pd->dag_ref = NULL;
1016  delete_pcap_dag(p);
1017 
1018 fail:
1020  if (newDev != NULL) {
1021  free((char *)newDev);
1022  }
1023 
1024  return ret;
1025 }
1026 
1027 pcap_t *dag_create(const char *device, char *ebuf, int *is_ours)
1028 {
1029  const char *cp;
1030  char *cpend;
1031  long devnum;
1032  pcap_t *p;
1033  long stream = 0;
1034 
1035  /* Does this look like a DAG device? */
1036  cp = strrchr(device, '/');
1037  if (cp == NULL)
1038  cp = device;
1039  /* Does it begin with "dag"? */
1040  if (strncmp(cp, "dag", 3) != 0) {
1041  /* Nope, doesn't begin with "dag" */
1042  *is_ours = 0;
1043  return NULL;
1044  }
1045  /* Yes - is "dag" followed by a number from 0 to DAG_MAX_BOARDS-1 */
1046  cp += 3;
1047  devnum = strtol(cp, &cpend, 10);
1048  if (*cpend == ':') {
1049  /* Followed by a stream number. */
1050  stream = strtol(++cpend, &cpend, 10);
1051  }
1052 
1053  if (cpend == cp || *cpend != '\0') {
1054  /* Not followed by a number. */
1055  *is_ours = 0;
1056  return NULL;
1057  }
1058 
1059  if (devnum < 0 || devnum >= DAG_MAX_BOARDS) {
1060  /* Followed by a non-valid number. */
1061  *is_ours = 0;
1062  return NULL;
1063  }
1064 
1065  if (stream <0 || stream >= DAG_STREAM_MAX) {
1066  /* Followed by a non-valid stream number. */
1067  *is_ours = 0;
1068  return NULL;
1069  }
1070 
1071  /* OK, it's probably ours. */
1072  *is_ours = 1;
1073 
1074  p = PCAP_CREATE_COMMON(ebuf, struct pcap_dag);
1075  if (p == NULL)
1076  return NULL;
1077 
1079 
1080  /*
1081  * We claim that we support microsecond and nanosecond time
1082  * stamps.
1083  *
1084  * XXX Our native precision is 2^-32s, but libpcap doesn't support
1085  * power of two precisions yet. We can convert to either MICRO or NANO.
1086  */
1087  p->tstamp_precision_list = malloc(2 * sizeof(u_int));
1088  if (p->tstamp_precision_list == NULL) {
1090  errno, "malloc");
1091  pcap_close(p);
1092  return NULL;
1093  }
1096  p->tstamp_precision_count = 2;
1097  return p;
1098 }
1099 
1100 static int
1101 dag_stats(pcap_t *p, struct pcap_stat *ps) {
1102  struct pcap_dag *pd = p->priv;
1103  uint32_t stream_drop;
1104  dag_err_t dag_error;
1105 
1106  /*
1107  * Packet records received (ps_recv) are counted in dag_read().
1108  * Packet records dropped (ps_drop) are read from Stream Drop attribute if present,
1109  * otherwise integrate the ERF Header lctr counts (if available) in dag_read().
1110  * We are reporting that no records are dropped by the card/driver (ps_ifdrop).
1111  */
1112 
1113  if(pd->drop_attr != kNullAttributeUuid) {
1114  /* Note this counter is cleared at start of capture and will wrap at UINT_MAX.
1115  * The application is responsible for polling ps_drop frequently enough
1116  * to detect each wrap and integrate total drop with a wider counter */
1117  if ((dag_error = dag_config_get_uint32_attribute_ex(pd->dag_ref, pd->drop_attr, &stream_drop)) == kDagErrNone) {
1118  pd->stat.ps_drop = stream_drop;
1119  } else {
1120  snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "reading stream drop attribute: %s",
1121  dag_config_strerror(dag_error));
1122  return -1;
1123  }
1124  }
1125 
1126  *ps = pd->stat;
1127 
1128  return 0;
1129 }
1130 
1131 /*
1132  * Add all DAG devices.
1133  */
1134 int
1135 dag_findalldevs(pcap_if_list_t *devlistp, char *errbuf)
1136 {
1137  char name[12]; /* XXX - pick a size */
1138  int c;
1139  char dagname[DAGNAME_BUFSIZE];
1140  int dagstream;
1141  int dagfd;
1142  dag_card_inf_t *inf;
1143  char *description;
1144  int stream, rxstreams;
1145 
1146  /* Try all the DAGs 0-DAG_MAX_BOARDS */
1147  for (c = 0; c < DAG_MAX_BOARDS; c++) {
1148  snprintf(name, 12, "dag%d", c);
1149  if (-1 == dag_parse_name(name, dagname, DAGNAME_BUFSIZE, &dagstream))
1150  {
1151  (void) snprintf(errbuf, PCAP_ERRBUF_SIZE,
1152  "dag: device name %s can't be parsed", name);
1153  return (-1);
1154  }
1155  if ( (dagfd = dag_open(dagname)) >= 0 ) {
1156  description = NULL;
1157  if ((inf = dag_pciinfo(dagfd)))
1158  description = dag_device_name(inf->device_code, 1);
1159  /*
1160  * XXX - is there a way to determine whether
1161  * the card is plugged into a network or not?
1162  * If so, we should check that and set
1163  * PCAP_IF_CONNECTION_STATUS_CONNECTED or
1164  * PCAP_IF_CONNECTION_STATUS_DISCONNECTED.
1165  *
1166  * Also, are there notions of "up" and "running"?
1167  */
1168  if (add_dev(devlistp, name, 0, description, errbuf) == NULL) {
1169  /*
1170  * Failure.
1171  */
1172  return (-1);
1173  }
1174  rxstreams = dag_rx_get_stream_count(dagfd);
1175  for(stream=0;stream<DAG_STREAM_MAX;stream+=2) {
1176  if (0 == dag_attach_stream64(dagfd, stream, 0, 0)) {
1177  dag_detach_stream(dagfd, stream);
1178 
1179  snprintf(name, 10, "dag%d:%d", c, stream);
1180  if (add_dev(devlistp, name, 0, description, errbuf) == NULL) {
1181  /*
1182  * Failure.
1183  */
1184  return (-1);
1185  }
1186 
1187  rxstreams--;
1188  if(rxstreams <= 0) {
1189  break;
1190  }
1191  }
1192  }
1193  dag_close(dagfd);
1194  }
1195 
1196  }
1197  return (0);
1198 }
1199 
1200 static int
1202 {
1203  p->linktype = dlt;
1204 
1205  return (0);
1206 }
1207 
1208 static int
1209 dag_setnonblock(pcap_t *p, int nonblock)
1210 {
1211  struct pcap_dag *pd = p->priv;
1212  dag_size_t mindata;
1213  struct timeval maxwait;
1214  struct timeval poll;
1215 
1216  /*
1217  * Set non-blocking mode on the FD.
1218  * XXX - is that necessary? If not, don't bother calling it,
1219  * and have a "dag_getnonblock()" function that looks at
1220  * "pd->dag_flags".
1221  */
1222  if (pcap_setnonblock_fd(p, nonblock) < 0)
1223  return (-1);
1224 
1225  if (dag_get_stream_poll64(p->fd, pd->dag_stream,
1226  &mindata, &maxwait, &poll) < 0) {
1228  errno, "dag_get_stream_poll");
1229  return -1;
1230  }
1231 
1232  /* Amount of data to collect in Bytes before calling callbacks.
1233  * Important for efficiency, but can introduce latency
1234  * at low packet rates if to_ms not set!
1235  */
1236  if(nonblock)
1237  mindata = 0;
1238  else
1239  mindata = 65536;
1240 
1241  if (dag_set_stream_poll64(p->fd, pd->dag_stream,
1242  mindata, &maxwait, &poll) < 0) {
1244  errno, "dag_set_stream_poll");
1245  return -1;
1246  }
1247 
1248  if (nonblock) {
1249  pd->dag_flags |= DAGF_NONBLOCK;
1250  } else {
1251  pd->dag_flags &= ~~DAGF_NONBLOCK;
1252  }
1253  return (0);
1254 }
1255 
1256 static int
1258 {
1259  struct pcap_dag *pd = p->priv;
1260  int index=0, dlt_index=0;
1261  uint8_t types[255];
1262 
1263  memset(types, 0, 255);
1264 
1265  if (p->dlt_list == NULL && (p->dlt_list = malloc(255*sizeof(*(p->dlt_list)))) == NULL) {
1266  pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
1267  errno, "malloc");
1268  return (-1);
1269  }
1270 
1271  p->linktype = 0;
1272 
1273 #ifdef HAVE_DAG_GET_STREAM_ERF_TYPES
1274  /* Get list of possible ERF types for this card */
1275  if (dag_get_stream_erf_types(p->fd, pd->dag_stream, types, 255) < 0) {
1276  pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
1277  errno, "dag_get_stream_erf_types");
1278  return (-1);
1279  }
1280 
1281  while (types[index]) {
1282 
1283 #elif defined HAVE_DAG_GET_ERF_TYPES
1284  /* Get list of possible ERF types for this card */
1285  if (dag_get_erf_types(p->fd, types, 255) < 0) {
1286  pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
1287  errno, "dag_get_erf_types");
1288  return (-1);
1289  }
1290 
1291  while (types[index]) {
1292 #else
1293  /* Check the type through a dagapi call. */
1294  types[index] = dag_linktype(p->fd);
1295 
1296  {
1297 #endif
1298  switch((types[index] & 0x7f)) {
1299 
1300  case ERF_TYPE_HDLC_POS:
1304 
1305  if (p->dlt_list != NULL) {
1306  p->dlt_list[dlt_index++] = DLT_CHDLC;
1307  p->dlt_list[dlt_index++] = DLT_PPP_SERIAL;
1308  p->dlt_list[dlt_index++] = DLT_FRELAY;
1309  }
1310  if(!p->linktype)
1311  p->linktype = DLT_CHDLC;
1312  break;
1313 
1314  case ERF_TYPE_ETH:
1315  case ERF_TYPE_COLOR_ETH:
1318  /*
1319  * This is (presumably) a real Ethernet capture; give it a
1320  * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
1321  * that an application can let you choose it, in case you're
1322  * capturing DOCSIS traffic that a Cisco Cable Modem
1323  * Termination System is putting out onto an Ethernet (it
1324  * doesn't put an Ethernet header onto the wire, it puts raw
1325  * DOCSIS frames out on the wire inside the low-level
1326  * Ethernet framing).
1327  */
1328  if (p->dlt_list != NULL) {
1329  p->dlt_list[dlt_index++] = DLT_EN10MB;
1330  p->dlt_list[dlt_index++] = DLT_DOCSIS;
1331  }
1332  if(!p->linktype)
1333  p->linktype = DLT_EN10MB;
1334  break;
1335 
1336  case ERF_TYPE_ATM:
1337  case ERF_TYPE_AAL5:
1338  case ERF_TYPE_MC_ATM:
1339  case ERF_TYPE_MC_AAL5:
1340  if (p->dlt_list != NULL) {
1341  p->dlt_list[dlt_index++] = DLT_ATM_RFC1483;
1342  p->dlt_list[dlt_index++] = DLT_SUNATM;
1343  }
1344  if(!p->linktype)
1346  break;
1347 
1349  case ERF_TYPE_MC_HDLC:
1350  if (p->dlt_list != NULL) {
1351  p->dlt_list[dlt_index++] = DLT_CHDLC;
1352  p->dlt_list[dlt_index++] = DLT_PPP_SERIAL;
1353  p->dlt_list[dlt_index++] = DLT_FRELAY;
1354  p->dlt_list[dlt_index++] = DLT_MTP2;
1355  p->dlt_list[dlt_index++] = DLT_MTP2_WITH_PHDR;
1356  p->dlt_list[dlt_index++] = DLT_LAPD;
1357  }
1358  if(!p->linktype)
1359  p->linktype = DLT_CHDLC;
1360  break;
1361 
1362  case ERF_TYPE_IPV4:
1363  if (p->dlt_list != NULL) {
1364  p->dlt_list[dlt_index++] = DLT_RAW;
1365  p->dlt_list[dlt_index++] = DLT_IPV4;
1366  }
1367  if(!p->linktype)
1368  p->linktype = DLT_RAW;
1369  break;
1370 
1371  case ERF_TYPE_IPV6:
1372  if (p->dlt_list != NULL) {
1373  p->dlt_list[dlt_index++] = DLT_RAW;
1374  p->dlt_list[dlt_index++] = DLT_IPV6;
1375  }
1376  if(!p->linktype)
1377  p->linktype = DLT_RAW;
1378  break;
1379 
1380  case ERF_TYPE_LEGACY:
1381  case ERF_TYPE_MC_RAW:
1383  case ERF_TYPE_IP_COUNTER:
1385  case ERF_TYPE_INFINIBAND:
1386  case ERF_TYPE_RAW_LINK:
1388  case ERF_TYPE_META:
1389  default:
1390  /* Libpcap cannot deal with these types yet */
1391  /* Add no 'native' DLTs, but still covered by DLT_ERF */
1392  break;
1393 
1394  } /* switch */
1395  index++;
1396  }
1397 
1398  p->dlt_list[dlt_index++] = DLT_ERF;
1399 
1400  p->dlt_count = dlt_index;
1401 
1402  if(!p->linktype)
1403  p->linktype = DLT_ERF;
1404 
1405  return p->linktype;
1406 }
1407 
1408 #ifdef DAG_ONLY
1409 /*
1410  * This libpcap build supports only DAG cards, not regular network
1411  * interfaces.
1412  */
1413 
1414 /*
1415  * There are no regular interfaces, just DAG interfaces.
1416  */
1417 int
1418 pcap_platform_finddevs(pcap_if_list_t *devlistp _U_, char *errbuf)
1419 {
1420  return (0);
1421 }
1422 
1423 /*
1424  * Attempts to open a regular interface fail.
1425  */
1426 pcap_t *
1427 pcap_create_interface(const char *device, char *errbuf)
1428 {
1429  snprintf(errbuf, PCAP_ERRBUF_SIZE,
1430  "This version of libpcap only supports DAG cards");
1431  return NULL;
1432 }
1433 
1434 /*
1435  * Libpcap version string.
1436  */
1437 const char *
1438 pcap_lib_version(void)
1439 {
1440  return (PCAP_VERSION_STRING " (DAG-only)");
1441 }
1442 #endif
u_int pcap_filter(const struct bpf_insn *pc, const u_char *p, u_int wirelen, u_int buflen)
Definition: bpf_filter.c:391
static pcap_t * pd
Definition: capturetest.c:63
#define DLT_RAW
Definition: dlt.h:88
#define DLT_PPP_SERIAL
Definition: dlt.h:152
#define DLT_EN10MB
Definition: dlt.h:63
#define DLT_FRELAY
Definition: dlt.h:215
#define DLT_ATM_RFC1483
Definition: dlt.h:83
#define DLT_MTP2_WITH_PHDR
Definition: dlt.h:457
#define DLT_IPV4
Definition: dlt.h:1041
#define DLT_DOCSIS
Definition: dlt.h:465
#define DLT_IPV6
Definition: dlt.h:1042
#define DLT_SUNATM
Definition: dlt.h:381
#define DLT_LAPD
Definition: dlt.h:814
#define DLT_MTP2
Definition: dlt.h:458
#define DLT_ERF
Definition: dlt.h:762
#define DLT_CHDLC
Definition: dlt.h:198
void pcap_fmt_errmsg_for_errno(char *errbuf, size_t errbuflen, int errnum, const char *fmt,...)
Definition: fmtutils.c:269
int install_bpf_program(pcap_t *p, struct bpf_program *fp)
Definition: optimize.c:2939
int snprintf(char *, size_t, const char *,...)
char * strerror(int)
long strtol(const char *, char **, int)
const char * pcap_lib_version(void)
Definition: pcap-bpf.c:3590
int pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
Definition: pcap-bpf.c:2995
pcap_t * pcap_create_interface(const char *device, char *ebuf)
Definition: pcap-bpf.c:443
#define dag_size_t
Definition: pcap-dag.c:207
#define ERF_TYPE_COLOR_HDLC_POS
Definition: pcap-dag.c:74
static int dag_activate(pcap_t *p)
Definition: pcap-dag.c:738
static int dag_stats(pcap_t *p, struct pcap_stat *ps)
Definition: pcap-dag.c:1101
static void delete_pcap_dag(pcap_t *p)
Definition: pcap-dag.c:216
#define MTP2_HDR_LEN
Definition: pcap-dag.c:154
static int atexit_handler_installed
Definition: pcap-dag.c:194
#define ERF_TYPE_MC_ATM
Definition: pcap-dag.c:62
#define ERF_TYPE_TCP_FLOW_COUNTER
Definition: pcap-dag.c:90
#define ATM_CELL_SIZE
Definition: pcap-dag.c:145
#define MAX_DAG_PACKET
Definition: pcap-dag.c:199
static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
Definition: pcap-dag.c:339
#define ERF_TYPE_COLOR_HASH_POS
Definition: pcap-dag.c:110
#define ERF_TYPE_PAD
Definition: pcap-dag.c:142
#define ERF_TYPE_MC_AAL5
Definition: pcap-dag.c:70
#define ERF_TYPE_IP_COUNTER
Definition: pcap-dag.c:86
#define ERF_TYPE_DSM_COLOR_ETH
Definition: pcap-dag.c:98
static int new_pcap_dag(pcap_t *p)
Definition: pcap-dag.c:279
pcap_t * dag_create(const char *device, char *ebuf, int *is_ours)
Definition: pcap-dag.c:1027
#define ERF_TYPE_MC_RAW
Definition: pcap-dag.c:58
static int dag_set_datalink(pcap_t *p, int dlt)
Definition: pcap-dag.c:1201
static unsigned int dag_erf_ext_header_count(uint8_t *erf, size_t len)
Definition: pcap-dag.c:302
static int dag_inject(pcap_t *p, const void *buf, int size)
Definition: pcap-dag.c:720
#define IS_BIGENDIAN()
Definition: pcap-dag.c:197
#define ERF_TYPE_COLOR_HASH_ETH
Definition: pcap-dag.c:114
#define ERF_TYPE_RAW_LINK
Definition: pcap-dag.c:130
#define ERF_TYPE_MC_AAL2
Definition: pcap-dag.c:82
#define MTP2_SENT_OFFSET
Definition: pcap-dag.c:151
#define ERF_TYPE_MC_RAW_CHANNEL
Definition: pcap-dag.c:66
int dag_findalldevs(pcap_if_list_t *devlistp, char *errbuf)
Definition: pcap-dag.c:1135
#define ERF_TYPE_MC_HDLC
Definition: pcap-dag.c:54
static int dag_setnonblock(pcap_t *p, int nonblock)
Definition: pcap-dag.c:1209
#define dag_set_stream_poll64(a, b, c, d, e)
Definition: pcap-dag.c:206
static pcap_dag_node_t * pcap_dags
Definition: pcap-dag.c:193
#define ERF_TYPE_META
Definition: pcap-dag.c:138
#define dag_attach_stream64(a, b, c, d)
Definition: pcap-dag.c:204
static const unsigned short endian_test_word
Definition: pcap-dag.c:195
#define DAG_MAX_BOARDS
Definition: pcap-dag.c:45
#define ERF_TYPE_IPV6
Definition: pcap-dag.c:126
#define ERF_TYPE_DSM_COLOR_HDLC_POS
Definition: pcap-dag.c:94
static void atexit_handler(void)
Definition: pcap-dag.c:266
static void dag_platform_cleanup(pcap_t *p)
Definition: pcap-dag.c:239
#define ATM_HDR_SIZE
Definition: pcap-dag.c:146
#define MTP2_LINK_NUMBER_OFFSET
Definition: pcap-dag.c:153
#define ERF_TYPE_COLOR_ETH
Definition: pcap-dag.c:78
#define MTP2_ANNEX_A_USED_OFFSET
Definition: pcap-dag.c:152
static int dag_get_datalink(pcap_t *p)
Definition: pcap-dag.c:1257
#define ERF_TYPE_INFINIBAND
Definition: pcap-dag.c:118
struct pcap_dag_node pcap_dag_node_t
#define ERF_TYPE_AAL5
Definition: pcap-dag.c:50
#define ERF_TYPE_COLOR_MC_HDLC_POS
Definition: pcap-dag.c:102
#define MTP2_ANNEX_A_USED_UNKNOWN
Definition: pcap-dag.c:158
#define dag_get_stream_poll64(a, b, c, d, e)
Definition: pcap-dag.c:205
#define ERF_TYPE_INFINIBAND_LINK
Definition: pcap-dag.c:134
static unsigned char TempPkt[65536]
Definition: pcap-dag.c:201
#define ERF_TYPE_IPV4
Definition: pcap-dag.c:122
#define _U_
Definition: pcap-dos.h:93
int errno
#define MAXIMUM_SNAPLEN
Definition: pcap-int.h:131
#define PACKET_COUNT_IS_UNLIMITED(count)
Definition: pcap-int.h:444
pcap_if_t * add_dev(pcap_if_list_t *, const char *, bpf_u_int32, const char *, char *)
Definition: pcap.c:1308
#define SWAPLL(ull)
Definition: pcap-int.h:96
void pcap_cleanup_live_common(pcap_t *)
Definition: pcap.c:3987
int pcap_getnonblock_fd(pcap_t *)
Definition: pcap.c:3537
int pcap_setnonblock_fd(pcap_t *p, int)
Definition: pcap.c:3583
#define PCAP_VERSION_STRING
Definition: pcap-int.h:59
#define PCAP_CREATE_COMMON(ebuf, type)
Definition: pcap-int.h:474
#define PCAP_ERROR_PERM_DENIED
Definition: pcap.h:346
#define LT_FCS_DATALINK_EXT(x)
Definition: pcap.h:225
#define PCAP_TSTAMP_PRECISION_NANO
Definition: pcap.h:512
void(* pcap_handler)(u_char *, const struct pcap_pkthdr *, const u_char *)
Definition: pcap.h:330
#define PCAP_ERROR_NO_SUCH_DEVICE
Definition: pcap.h:343
#define PCAP_TSTAMP_PRECISION_MICRO
Definition: pcap.h:511
#define PCAP_ERRBUF_SIZE
Definition: pcap.h:152
#define PCAP_ERROR
Definition: pcap.h:339
void pcap_close(pcap_t *p)
Definition: pcap.c:4065
size_t pcap_strlcpy(char *restrict dst, const char *restrict src, size_t dsize)
Definition: strlcpy.c:34
struct bpf_insn * bf_insns
Definition: bpf.h:119
struct pcap_dag_node * next
Definition: pcap-dag.c:188
pcap_t * p
Definition: pcap-dag.c:189
struct timeval required_select_timeout
Definition: pcap-dag.c:183
struct pcap_stat stat
Definition: pcap-dag.c:171
u_char * dag_mem_top
Definition: pcap-dag.c:173
attr_uuid_t drop_attr
Definition: pcap-dag.c:182
u_char * dag_mem_bottom
Definition: pcap-dag.c:172
dag_card_ref_t dag_ref
Definition: pcap-dag.c:180
int dag_flags
Definition: pcap-dag.c:175
int dag_stream
Definition: pcap-dag.c:176
int dag_timeout
Definition: pcap-dag.c:177
int dag_fcs_bits
Definition: pcap-dag.c:174
dag_component_t dag_root
Definition: pcap-dag.c:181
int timeout
Definition: pcap-int.h:147
char * device
Definition: pcap-int.h:146
int tstamp_precision
Definition: pcap-int.h:154
int immediate
Definition: pcap-int.h:151
bpf_u_int32 caplen
Definition: pcap.h:247
struct timeval ts
Definition: pcap.h:246
bpf_u_int32 len
Definition: pcap.h:248
Definition: pcap-int.h:200
stats_op_t stats_op
Definition: pcap-int.h:320
activate_op_t activate_op
Definition: pcap-int.h:311
setnonblock_op_t setnonblock_op
Definition: pcap-int.h:319
setfilter_op_t setfilter_op
Definition: pcap-int.h:315
u_int * tstamp_precision_list
Definition: pcap-int.h:304
sig_atomic_t break_loop
Definition: pcap-int.h:225
int dlt_count
Definition: pcap-int.h:299
int linktype_ext
Definition: pcap-int.h:249
u_int bufsize
Definition: pcap-int.h:220
void * priv
Definition: pcap-int.h:227
getnonblock_op_t getnonblock_op
Definition: pcap-int.h:318
u_int * dlt_list
Definition: pcap-int.h:300
read_op_t read_op
Definition: pcap-int.h:204
int snapshot
Definition: pcap-int.h:247
cleanup_op_t cleanup_op
Definition: pcap-int.h:346
const struct timeval * required_select_timeout
Definition: pcap-int.h:287
setdirection_op_t setdirection_op
Definition: pcap-int.h:316
int tstamp_precision_count
Definition: pcap-int.h:303
inject_op_t inject_op
Definition: pcap-int.h:313
struct bpf_program fcode
Definition: pcap-int.h:293
set_datalink_op_t set_datalink_op
Definition: pcap-int.h:317
char errbuf[256+1]
Definition: pcap-int.h:295
int linktype
Definition: pcap-int.h:248
int selectable_fd
Definition: pcap-int.h:274
int fd
Definition: pcap-int.h:214
struct pcap_opt opt
Definition: pcap-int.h:254
unsigned char vpi
Definition: pcap-dag.c:163
unsigned char flags
Definition: pcap-dag.c:162
unsigned short vci
Definition: pcap-dag.c:164