1 /*
2 * collectd - src/utils_dns.c
3 * Modifications Copyright (C) 2006 Florian octo Forster
4 * Copyright (C) 2002 The Measurement Factory, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 * 3. Neither the name of The Measurement Factory nor the names of its
16 * contributors may be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Authors:
32 * The Measurement Factory, Inc. <http://www.measurement-factory.com/>
33 * Florian octo Forster <octo at verplant.org>
34 */
36 #define _BSD_SOURCE
38 #include "collectd.h"
39 #include "plugin.h"
40 #include "common.h"
42 #if HAVE_NETINET_IN_SYSTM_H
43 # include <netinet/in_systm.h>
44 #endif
45 #if HAVE_NETINET_IN_H
46 # include <netinet/in.h>
47 #endif
48 #if HAVE_ARPA_INET_H
49 # include <arpa/inet.h>
50 #endif
51 #if HAVE_SYS_SOCKET_H
52 # include <sys/socket.h>
53 #endif
55 #if HAVE_ARPA_NAMESER_H
56 # include <arpa/nameser.h>
57 #endif
58 #if HAVE_ARPA_NAMESER_COMPAT_H
59 # include <arpa/nameser_compat.h>
60 #endif
62 #if HAVE_NET_IF_ARP_H
63 # include <net/if_arp.h>
64 #endif
65 #if HAVE_NET_IF_H
66 # include <net/if.h>
67 #endif
68 #if HAVE_NETINET_IF_ETHER_H
69 # include <netinet/if_ether.h>
70 #endif
71 #if HAVE_NET_PPP_DEFS_H
72 # include <net/ppp_defs.h>
73 #endif
74 #if HAVE_NET_IF_PPP_H
75 # include <net/if_ppp.h>
76 #endif
78 #if HAVE_NETDB_H
79 # include <netdb.h>
80 #endif
82 #if HAVE_NETINET_IP_H
83 # include <netinet/ip.h>
84 #endif
85 #ifdef HAVE_NETINET_IP_VAR_H
86 # include <netinet/ip_var.h>
87 #endif
88 #if HAVE_NETINET_IP6_H
89 # include <netinet/ip6.h>
90 #endif
91 #if HAVE_NETINET_UDP_H
92 # include <netinet/udp.h>
93 #endif
95 #if HAVE_PCAP_H
96 # include <pcap.h>
97 #endif
99 #define PCAP_SNAPLEN 1460
100 #ifndef ETHER_HDR_LEN
101 #define ETHER_ADDR_LEN 6
102 #define ETHER_TYPE_LEN 2
103 #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
104 #endif
105 #ifndef ETHERTYPE_8021Q
106 # define ETHERTYPE_8021Q 0x8100
107 #endif
108 #ifndef ETHERTYPE_IPV6
109 # define ETHERTYPE_IPV6 0x86DD
110 #endif
112 #ifndef PPP_ADDRESS_VAL
113 # define PPP_ADDRESS_VAL 0xff /* The address byte value */
114 #endif
115 #ifndef PPP_CONTROL_VAL
116 # define PPP_CONTROL_VAL 0x03 /* The control byte value */
117 #endif
119 #if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
120 # define UDP_DEST uh_dport
121 # define UDP_SRC uh_dport
122 #elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
123 # define UDP_DEST dest
124 # define UDP_SRC source
125 #else
126 # error "`struct udphdr' is unusable."
127 #endif
129 #include "utils_dns.h"
131 /*
132 * Type definitions
133 */
134 struct ip_list_s
135 {
136 struct in6_addr addr;
137 void *data;
138 struct ip_list_s *next;
139 };
140 typedef struct ip_list_s ip_list_t;
142 typedef int (printer)(const char *, ...);
144 /*
145 * flags/features for non-interactive mode
146 */
148 #ifndef T_A6
149 #define T_A6 38
150 #endif
151 #ifndef T_SRV
152 #define T_SRV 33
153 #endif
155 /*
156 * Global variables
157 */
158 int qtype_counts[T_MAX];
159 int opcode_counts[OP_MAX];
160 int qclass_counts[C_MAX];
162 #if HAVE_PCAP_H
163 static pcap_t *pcap_obj = NULL;
164 #endif
166 static ip_list_t *IgnoreList = NULL;
168 #if HAVE_PCAP_H
169 static void (*Callback) (const rfc1035_header_t *) = NULL;
171 static int query_count_intvl = 0;
172 static int query_count_total = 0;
173 # ifdef __OpenBSD__
174 static struct bpf_timeval last_ts;
175 # else
176 static struct timeval last_ts;
177 # endif /* __OpenBSD__ */
178 #endif /* HAVE_PCAP_H */
180 static int cmp_in6_addr (const struct in6_addr *a,
181 const struct in6_addr *b)
182 {
183 int i;
185 assert (sizeof (struct in6_addr) == 16);
187 for (i = 0; i < 16; i++)
188 if (a->s6_addr[i] != b->s6_addr[i])
189 break;
191 if (i >= 16)
192 return (0);
194 return (a->s6_addr[i] > b->s6_addr[i] ? 1 : -1);
195 } /* int cmp_addrinfo */
197 static inline int ignore_list_match (const struct in6_addr *addr)
198 {
199 ip_list_t *ptr;
201 for (ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
202 if (cmp_in6_addr (addr, &ptr->addr) == 0)
203 return (1);
204 return (0);
205 } /* int ignore_list_match */
207 static void ignore_list_add (const struct in6_addr *addr)
208 {
209 ip_list_t *new;
211 if (ignore_list_match (addr) != 0)
212 return;
214 new = malloc (sizeof (ip_list_t));
215 if (new == NULL)
216 {
217 perror ("malloc");
218 return;
219 }
221 memcpy (&new->addr, addr, sizeof (struct in6_addr));
222 new->next = IgnoreList;
224 IgnoreList = new;
225 } /* void ignore_list_add */
227 void ignore_list_add_name (const char *name)
228 {
229 struct addrinfo *ai_list;
230 struct addrinfo *ai_ptr;
231 struct in6_addr addr;
232 int status;
234 status = getaddrinfo (name, NULL, NULL, &ai_list);
235 if (status != 0)
236 return;
238 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
239 {
240 if (ai_ptr->ai_family == AF_INET)
241 {
242 memset (&addr, '\0', sizeof (addr));
243 addr.s6_addr[10] = 0xFF;
244 addr.s6_addr[11] = 0xFF;
245 memcpy (addr.s6_addr + 12, &((struct sockaddr_in *) ai_ptr->ai_addr)->sin_addr, 4);
247 ignore_list_add (&addr);
248 }
249 else
250 {
251 ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
252 }
253 } /* for */
255 freeaddrinfo (ai_list);
256 }
258 #if HAVE_PCAP_H
259 static void in6_addr_from_buffer (struct in6_addr *ia,
260 const void *buf, size_t buf_len,
261 int family)
262 {
263 memset (ia, 0, sizeof (struct in6_addr));
264 if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
265 {
266 ia->s6_addr[10] = 0xFF;
267 ia->s6_addr[11] = 0xFF;
268 memcpy (ia->s6_addr + 12, buf, buf_len);
269 }
270 else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
271 {
272 memcpy (ia, buf, buf_len);
273 }
274 } /* void in6_addr_from_buffer */
276 void dnstop_set_pcap_obj (pcap_t *po)
277 {
278 pcap_obj = po;
279 }
281 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
282 {
283 Callback = cb;
284 }
286 #define RFC1035_MAXLABELSZ 63
287 static int
288 rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns
289 )
290 {
291 off_t no = 0;
292 unsigned char c;
293 size_t len;
294 static int loop_detect = 0;
295 if (loop_detect > 2)
296 return 4; /* compression loop */
297 if (ns <= 0)
298 return 4; /* probably compression loop */
299 do {
300 if ((*off) >= sz)
301 break;
302 c = *(buf + (*off));
303 if (c > 191) {
304 /* blasted compression */
305 int rc;
306 unsigned short s;
307 off_t ptr;
308 memcpy(&s, buf + (*off), sizeof(s));
309 s = ntohs(s);
310 (*off) += sizeof(s);
311 /* Sanity check */
312 if ((*off) >= sz)
313 return 1; /* message too short */
314 ptr = s & 0x3FFF;
315 /* Make sure the pointer is inside this message */
316 if (ptr >= sz)
317 return 2; /* bad compression ptr */
318 if (ptr < DNS_MSG_HDR_SZ)
319 return 2; /* bad compression ptr */
320 loop_detect++;
321 rc = rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
322 loop_detect--;
323 return rc;
324 } else if (c > RFC1035_MAXLABELSZ) {
325 /*
326 * "(The 10 and 01 combinations are reserved for future use.)"
327 */
328 return 3; /* reserved label/compression flags */
329 break;
330 } else {
331 (*off)++;
332 len = (size_t) c;
333 if (len == 0)
334 break;
335 if (len > (ns - 1))
336 len = ns - 1;
337 if ((*off) + len > sz)
338 return 4; /* message is too short */
339 if (no + len + 1 > ns)
340 return 5; /* qname would overflow name buffer */
341 memcpy(name + no, buf + (*off), len);
342 (*off) += len;
343 no += len;
344 *(name + (no++)) = '.';
345 }
346 } while (c > 0);
347 if (no > 0)
348 *(name + no - 1) = '\0';
349 /* make sure we didn't allow someone to overflow the name buffer */
350 assert(no <= ns);
351 return 0;
352 }
354 static int
355 handle_dns(const char *buf, int len)
356 {
357 rfc1035_header_t qh;
358 uint16_t us;
359 off_t offset;
360 char *t;
361 int status;
363 /* The DNS header is 12 bytes long */
364 if (len < DNS_MSG_HDR_SZ)
365 return 0;
367 memcpy(&us, buf + 0, 2);
368 qh.id = ntohs(us);
370 memcpy(&us, buf + 2, 2);
371 us = ntohs(us);
372 qh.qr = (us >> 15) & 0x01;
373 qh.opcode = (us >> 11) & 0x0F;
374 qh.aa = (us >> 10) & 0x01;
375 qh.tc = (us >> 9) & 0x01;
376 qh.rd = (us >> 8) & 0x01;
377 qh.ra = (us >> 7) & 0x01;
378 qh.z = (us >> 6) & 0x01;
379 qh.ad = (us >> 5) & 0x01;
380 qh.cd = (us >> 4) & 0x01;
381 qh.rcode = us & 0x0F;
383 memcpy(&us, buf + 4, 2);
384 qh.qdcount = ntohs(us);
386 memcpy(&us, buf + 6, 2);
387 qh.ancount = ntohs(us);
389 memcpy(&us, buf + 8, 2);
390 qh.nscount = ntohs(us);
392 memcpy(&us, buf + 10, 2);
393 qh.arcount = ntohs(us);
395 offset = DNS_MSG_HDR_SZ;
396 memset(qh.qname, '\0', MAX_QNAME_SZ);
397 status = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
398 if (status != 0)
399 {
400 INFO ("utils_dns: handle_dns: rfc1035NameUnpack failed "
401 "with status %i.", status);
402 return 0;
403 }
404 if ('\0' == qh.qname[0])
405 sstrncpy (qh.qname, ".", sizeof (qh.qname));
406 while ((t = strchr(qh.qname, '\n')))
407 *t = ' ';
408 while ((t = strchr(qh.qname, '\r')))
409 *t = ' ';
410 for (t = qh.qname; *t; t++)
411 *t = tolower((int) *t);
413 memcpy(&us, buf + offset, 2);
414 qh.qtype = ntohs(us);
415 memcpy(&us, buf + offset + 2, 2);
416 qh.qclass = ntohs(us);
418 qh.length = (uint16_t) len;
420 /* gather stats */
421 qtype_counts[qh.qtype]++;
422 qclass_counts[qh.qclass]++;
423 opcode_counts[qh.opcode]++;
425 if (Callback != NULL)
426 Callback (&qh);
428 return 1;
429 }
431 static int
432 handle_udp(const struct udphdr *udp, int len)
433 {
434 char buf[PCAP_SNAPLEN];
435 if ((ntohs (udp->UDP_DEST) != 53)
436 && (ntohs (udp->UDP_SRC) != 53))
437 return 0;
438 memcpy(buf, udp + 1, len - sizeof(*udp));
439 if (0 == handle_dns(buf, len - sizeof(*udp)))
440 return 0;
441 return 1;
442 }
444 #if HAVE_NETINET_IP6_H
445 static int
446 handle_ipv6 (struct ip6_hdr *ipv6, int len)
447 {
448 char buf[PCAP_SNAPLEN];
449 unsigned int offset;
450 int nexthdr;
452 struct in6_addr s_addr;
453 struct in6_addr d_addr;
454 uint16_t payload_len;
456 if (0 > len)
457 return (0);
459 offset = sizeof (struct ip6_hdr);
460 nexthdr = ipv6->ip6_nxt;
461 s_addr = ipv6->ip6_src;
462 d_addr = ipv6->ip6_dst;
463 payload_len = ntohs (ipv6->ip6_plen);
465 if (ignore_list_match (&s_addr))
466 return (0);
468 /* Parse extension headers. This only handles the standard headers, as
469 * defined in RFC 2460, correctly. Fragments are discarded. */
470 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
471 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
472 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
473 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
474 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
475 || (IPPROTO_AH == nexthdr) /* destination options. */
476 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
477 {
478 struct ip6_ext ext_hdr;
479 uint16_t ext_hdr_len;
481 /* Catch broken packets */
482 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
483 return (0);
485 /* Cannot handle fragments. */
486 if (IPPROTO_FRAGMENT == nexthdr)
487 return (0);
489 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
490 nexthdr = ext_hdr.ip6e_nxt;
491 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
493 /* This header is longer than the packets payload.. WTF? */
494 if (ext_hdr_len > payload_len)
495 return (0);
497 offset += ext_hdr_len;
498 payload_len -= ext_hdr_len;
499 } /* while */
501 /* Catch broken and empty packets */
502 if (((offset + payload_len) > (unsigned int)len)
503 || (payload_len == 0)
504 || (payload_len > PCAP_SNAPLEN))
505 return (0);
507 if (IPPROTO_UDP != nexthdr)
508 return (0);
510 memcpy (buf, (char *) ipv6 + offset, payload_len);
511 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
512 return (0);
514 return (1); /* Success */
515 } /* int handle_ipv6 */
516 /* #endif HAVE_NETINET_IP6_H */
518 #else /* if !HAVE_NETINET_IP6_H */
519 static int
520 handle_ipv6 (__attribute__((unused)) void *pkg,
521 __attribute__((unused)) int len)
522 {
523 return (0);
524 }
525 #endif /* !HAVE_NETINET_IP6_H */
527 static int
528 handle_ip(const struct ip *ip, int len)
529 {
530 char buf[PCAP_SNAPLEN];
531 int offset = ip->ip_hl << 2;
532 struct in6_addr s_addr;
533 struct in6_addr d_addr;
535 if (ip->ip_v == 6)
536 return (handle_ipv6 ((void *) ip, len));
538 in6_addr_from_buffer (&s_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
539 in6_addr_from_buffer (&d_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
540 if (ignore_list_match (&s_addr))
541 return (0);
542 if (IPPROTO_UDP != ip->ip_p)
543 return 0;
544 memcpy(buf, (void *) ip + offset, len - offset);
545 if (0 == handle_udp((struct udphdr *) buf, len - offset))
546 return 0;
547 return 1;
548 }
550 #if HAVE_NET_IF_PPP_H
551 static int
552 handle_ppp(const u_char * pkt, int len)
553 {
554 char buf[PCAP_SNAPLEN];
555 unsigned short us;
556 unsigned short proto;
557 if (len < 2)
558 return 0;
559 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
560 pkt += 2; /* ACFC not used */
561 len -= 2;
562 }
563 if (len < 2)
564 return 0;
565 if (*pkt % 2) {
566 proto = *pkt; /* PFC is used */
567 pkt++;
568 len--;
569 } else {
570 memcpy(&us, pkt, sizeof(us));
571 proto = ntohs(us);
572 pkt += 2;
573 len -= 2;
574 }
575 if (ETHERTYPE_IP != proto && PPP_IP != proto)
576 return 0;
577 memcpy(buf, pkt, len);
578 return handle_ip((struct ip *) buf, len);
579 }
580 #endif /* HAVE_NET_IF_PPP_H */
582 static int
583 handle_null(const u_char * pkt, int len)
584 {
585 unsigned int family;
586 memcpy(&family, pkt, sizeof(family));
587 if (AF_INET != family)
588 return 0;
589 return handle_ip((struct ip *) (pkt + 4), len - 4);
590 }
592 #ifdef DLT_LOOP
593 static int
594 handle_loop(const u_char * pkt, int len)
595 {
596 unsigned int family;
597 memcpy(&family, pkt, sizeof(family));
598 if (AF_INET != ntohl(family))
599 return 0;
600 return handle_ip((struct ip *) (pkt + 4), len - 4);
601 }
603 #endif
605 #ifdef DLT_RAW
606 static int
607 handle_raw(const u_char * pkt, int len)
608 {
609 return handle_ip((struct ip *) pkt, len);
610 }
612 #endif
614 static int
615 handle_ether(const u_char * pkt, int len)
616 {
617 char buf[PCAP_SNAPLEN];
618 struct ether_header *e = (void *) pkt;
619 unsigned short etype = ntohs(e->ether_type);
620 if (len < ETHER_HDR_LEN)
621 return 0;
622 pkt += ETHER_HDR_LEN;
623 len -= ETHER_HDR_LEN;
624 if (ETHERTYPE_8021Q == etype) {
625 etype = ntohs(*(unsigned short *) (pkt + 2));
626 pkt += 4;
627 len -= 4;
628 }
629 if ((ETHERTYPE_IP != etype)
630 && (ETHERTYPE_IPV6 != etype))
631 return 0;
632 memcpy(buf, pkt, len);
633 if (ETHERTYPE_IPV6 == etype)
634 return (handle_ipv6 ((void *) buf, len));
635 else
636 return handle_ip((struct ip *) buf, len);
637 }
639 #ifdef DLT_LINUX_SLL
640 static int
641 handle_linux_sll (const u_char *pkt, int len)
642 {
643 struct sll_header
644 {
645 uint16_t pkt_type;
646 uint16_t dev_type;
647 uint16_t addr_len;
648 uint8_t addr[8];
649 uint16_t proto_type;
650 } *hdr;
651 uint16_t etype;
653 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
654 return (0);
656 hdr = (struct sll_header *) pkt;
657 pkt = (u_char *) (hdr + 1);
658 len -= sizeof (struct sll_header);
660 etype = ntohs (hdr->proto_type);
662 if ((ETHERTYPE_IP != etype)
663 && (ETHERTYPE_IPV6 != etype))
664 return 0;
666 if (ETHERTYPE_IPV6 == etype)
667 return (handle_ipv6 ((void *) pkt, len));
668 else
669 return handle_ip((struct ip *) pkt, len);
670 }
671 #endif /* DLT_LINUX_SLL */
673 /* public function */
674 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
675 {
676 int status;
678 if (hdr->caplen < ETHER_HDR_LEN)
679 return;
681 switch (pcap_datalink (pcap_obj))
682 {
683 case DLT_EN10MB:
684 status = handle_ether (pkt, hdr->caplen);
685 break;
686 #if HAVE_NET_IF_PPP_H
687 case DLT_PPP:
688 status = handle_ppp (pkt, hdr->caplen);
689 break;
690 #endif
691 #ifdef DLT_LOOP
692 case DLT_LOOP:
693 status = handle_loop (pkt, hdr->caplen);
694 break;
695 #endif
696 #ifdef DLT_RAW
697 case DLT_RAW:
698 status = handle_raw (pkt, hdr->caplen);
699 break;
700 #endif
701 #ifdef DLT_LINUX_SLL
702 case DLT_LINUX_SLL:
703 status = handle_linux_sll (pkt, hdr->caplen);
704 break;
705 #endif
706 case DLT_NULL:
707 status = handle_null (pkt, hdr->caplen);
708 break;
710 default:
711 ERROR ("handle_pcap: unsupported data link type %d",
712 pcap_datalink(pcap_obj));
713 status = 0;
714 break;
715 } /* switch (pcap_datalink(pcap_obj)) */
717 if (0 == status)
718 return;
720 query_count_intvl++;
721 query_count_total++;
722 last_ts = hdr->ts;
723 }
724 #endif /* HAVE_PCAP_H */
726 const char *qtype_str(int t)
727 {
728 static char buf[32];
729 switch (t) {
730 #if (defined (__NAMESER)) && (__NAMESER >= 19991001)
731 case ns_t_a: return ("A");
732 case ns_t_ns: return ("NS");
733 case ns_t_md: return ("MD");
734 case ns_t_mf: return ("MF");
735 case ns_t_cname: return ("CNAME");
736 case ns_t_soa: return ("SOA");
737 case ns_t_mb: return ("MB");
738 case ns_t_mg: return ("MG");
739 case ns_t_mr: return ("MR");
740 case ns_t_null: return ("NULL");
741 case ns_t_wks: return ("WKS");
742 case ns_t_ptr: return ("PTR");
743 case ns_t_hinfo: return ("HINFO");
744 case ns_t_minfo: return ("MINFO");
745 case ns_t_mx: return ("MX");
746 case ns_t_txt: return ("TXT");
747 case ns_t_rp: return ("RP");
748 case ns_t_afsdb: return ("AFSDB");
749 case ns_t_x25: return ("X25");
750 case ns_t_isdn: return ("ISDN");
751 case ns_t_rt: return ("RT");
752 case ns_t_nsap: return ("NSAP");
753 case ns_t_nsap_ptr: return ("NSAP-PTR");
754 case ns_t_sig: return ("SIG");
755 case ns_t_key: return ("KEY");
756 case ns_t_px: return ("PX");
757 case ns_t_gpos: return ("GPOS");
758 case ns_t_aaaa: return ("AAAA");
759 case ns_t_loc: return ("LOC");
760 case ns_t_nxt: return ("NXT");
761 case ns_t_eid: return ("EID");
762 case ns_t_nimloc: return ("NIMLOC");
763 case ns_t_srv: return ("SRV");
764 case ns_t_atma: return ("ATMA");
765 case ns_t_naptr: return ("NAPTR");
766 case ns_t_kx: return ("KX");
767 case ns_t_cert: return ("CERT");
768 case ns_t_a6: return ("A6");
769 case ns_t_dname: return ("DNAME");
770 case ns_t_sink: return ("SINK");
771 case ns_t_opt: return ("OPT");
772 # if __NAMESER >= 19991006
773 case ns_t_tsig: return ("TSIG");
774 # endif
775 case ns_t_ixfr: return ("IXFR");
776 case ns_t_axfr: return ("AXFR");
777 case ns_t_mailb: return ("MAILB");
778 case ns_t_maila: return ("MAILA");
779 case ns_t_any: return ("ANY");
780 case ns_t_zxfr: return ("ZXFR");
781 /* #endif __NAMESER >= 19991006 */
782 #elif (defined (__BIND)) && (__BIND >= 19950621)
783 case T_A: return ("A"); /* 1 ... */
784 case T_NS: return ("NS");
785 case T_MD: return ("MD");
786 case T_MF: return ("MF");
787 case T_CNAME: return ("CNAME");
788 case T_SOA: return ("SOA");
789 case T_MB: return ("MB");
790 case T_MG: return ("MG");
791 case T_MR: return ("MR");
792 case T_NULL: return ("NULL");
793 case T_WKS: return ("WKS");
794 case T_PTR: return ("PTR");
795 case T_HINFO: return ("HINFO");
796 case T_MINFO: return ("MINFO");
797 case T_MX: return ("MX");
798 case T_TXT: return ("TXT");
799 case T_RP: return ("RP");
800 case T_AFSDB: return ("AFSDB");
801 case T_X25: return ("X25");
802 case T_ISDN: return ("ISDN");
803 case T_RT: return ("RT");
804 case T_NSAP: return ("NSAP");
805 case T_NSAP_PTR: return ("NSAP_PTR");
806 case T_SIG: return ("SIG");
807 case T_KEY: return ("KEY");
808 case T_PX: return ("PX");
809 case T_GPOS: return ("GPOS");
810 case T_AAAA: return ("AAAA");
811 case T_LOC: return ("LOC");
812 case T_NXT: return ("NXT");
813 case T_EID: return ("EID");
814 case T_NIMLOC: return ("NIMLOC");
815 case T_SRV: return ("SRV");
816 case T_ATMA: return ("ATMA");
817 case T_NAPTR: return ("NAPTR"); /* ... 35 */
818 #if (__BIND >= 19960801)
819 case T_KX: return ("KX"); /* 36 ... */
820 case T_CERT: return ("CERT");
821 case T_A6: return ("A6");
822 case T_DNAME: return ("DNAME");
823 case T_SINK: return ("SINK");
824 case T_OPT: return ("OPT");
825 case T_APL: return ("APL");
826 case T_DS: return ("DS");
827 case T_SSHFP: return ("SSHFP");
828 case T_RRSIG: return ("RRSIG");
829 case T_NSEC: return ("NSEC");
830 case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
831 case T_TKEY: return ("TKEY"); /* 249 */
832 #endif /* __BIND >= 19960801 */
833 case T_TSIG: return ("TSIG"); /* 250 ... */
834 case T_IXFR: return ("IXFR");
835 case T_AXFR: return ("AXFR");
836 case T_MAILB: return ("MAILB");
837 case T_MAILA: return ("MAILA");
838 case T_ANY: return ("ANY"); /* ... 255 */
839 #endif /* __BIND >= 19950621 */
840 default:
841 ssnprintf (buf, sizeof (buf), "#%i", t);
842 return (buf);
843 }; /* switch (t) */
844 /* NOTREACHED */
845 return (NULL);
846 }
848 const char *opcode_str (int o)
849 {
850 static char buf[30];
851 switch (o) {
852 case 0:
853 return "Query";
854 break;
855 case 1:
856 return "Iquery";
857 break;
858 case 2:
859 return "Status";
860 break;
861 case 4:
862 return "Notify";
863 break;
864 case 5:
865 return "Update";
866 break;
867 default:
868 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
869 return buf;
870 }
871 /* NOTREACHED */
872 }
874 const char *rcode_str (int rcode)
875 {
876 static char buf[32];
877 switch (rcode)
878 {
879 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
880 case ns_r_noerror: return ("NOERROR");
881 case ns_r_formerr: return ("FORMERR");
882 case ns_r_servfail: return ("SERVFAIL");
883 case ns_r_nxdomain: return ("NXDOMAIN");
884 case ns_r_notimpl: return ("NOTIMPL");
885 case ns_r_refused: return ("REFUSED");
886 case ns_r_yxdomain: return ("YXDOMAIN");
887 case ns_r_yxrrset: return ("YXRRSET");
888 case ns_r_nxrrset: return ("NXRRSET");
889 case ns_r_notauth: return ("NOTAUTH");
890 case ns_r_notzone: return ("NOTZONE");
891 case ns_r_max: return ("MAX");
892 case ns_r_badsig: return ("BADSIG");
893 case ns_r_badkey: return ("BADKEY");
894 case ns_r_badtime: return ("BADTIME");
895 /* #endif __NAMESER >= 19991006 */
896 #elif (defined (__BIND)) && (__BIND >= 19950621)
897 case NOERROR: return ("NOERROR");
898 case FORMERR: return ("FORMERR");
899 case SERVFAIL: return ("SERVFAIL");
900 case NXDOMAIN: return ("NXDOMAIN");
901 case NOTIMP: return ("NOTIMP");
902 case REFUSED: return ("REFUSED");
903 #if defined (YXDOMAIN) && defined (NXRRSET)
904 case YXDOMAIN: return ("YXDOMAIN");
905 case YXRRSET: return ("YXRRSET");
906 case NXRRSET: return ("NXRRSET");
907 case NOTAUTH: return ("NOTAUTH");
908 case NOTZONE: return ("NOTZONE");
909 #endif /* RFC2136 rcodes */
910 #endif /* __BIND >= 19950621 */
911 default:
912 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
913 return (buf);
914 }
915 /* Never reached */
916 return (NULL);
917 } /* const char *rcode_str (int rcode) */
919 #if 0
920 static int
921 main(int argc, char *argv[])
922 {
923 char errbuf[PCAP_ERRBUF_SIZE];
924 int x;
925 struct stat sb;
926 int readfile_state = 0;
927 struct bpf_program fp;
929 port53 = htons(53);
930 SubReport = Sources_report;
931 ignore_addr.s_addr = 0;
932 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
933 srandom(time(NULL));
934 ResetCounters();
936 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
937 switch (x) {
938 case 'a':
939 anon_flag = 1;
940 break;
941 case 's':
942 sld_flag = 1;
943 break;
944 case 't':
945 nld_flag = 1;
946 break;
947 case 'p':
948 promisc_flag = 0;
949 break;
950 case 'b':
951 bpf_program_str = strdup(optarg);
952 break;
953 case 'i':
954 ignore_addr.s_addr = inet_addr(optarg);
955 break;
956 case 'f':
957 set_filter(optarg);
958 break;
959 default:
960 usage();
961 break;
962 }
963 }
964 argc -= optind;
965 argv += optind;
967 if (argc < 1)
968 usage();
969 device = strdup(argv[0]);
971 if (0 == stat(device, &sb))
972 readfile_state = 1;
973 if (readfile_state) {
974 pcap_obj = pcap_open_offline(device, errbuf);
975 } else {
976 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
977 }
978 if (NULL == pcap_obj) {
979 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
980 exit(1);
981 }
983 if (0 == isatty(1)) {
984 if (0 == readfile_state) {
985 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
986 exit(1);
987 }
988 interactive = 0;
989 print_func = printf;
990 }
992 memset(&fp, '\0', sizeof(fp));
993 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
994 if (x < 0) {
995 fprintf(stderr, "pcap_compile failed\n");
996 exit(1);
997 }
998 x = pcap_setfilter(pcap_obj, &fp);
999 if (x < 0) {
1000 fprintf(stderr, "pcap_setfilter failed\n");
1001 exit(1);
1002 }
1004 /*
1005 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
1006 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
1007 */
1008 x = pcap_setnonblock(pcap_obj, 1, errbuf);
1009 if (x < 0) {
1010 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
1011 exit(1);
1012 }
1014 switch (pcap_datalink(pcap_obj)) {
1015 case DLT_EN10MB:
1016 handle_datalink = handle_ether;
1017 break;
1018 #if HAVE_NET_IF_PPP_H
1019 case DLT_PPP:
1020 handle_datalink = handle_ppp;
1021 break;
1022 #endif
1023 #ifdef DLT_LOOP
1024 case DLT_LOOP:
1025 handle_datalink = handle_loop;
1026 break;
1027 #endif
1028 #ifdef DLT_RAW
1029 case DLT_RAW:
1030 handle_datalink = handle_raw;
1031 break;
1032 #endif
1033 case DLT_NULL:
1034 handle_datalink = handle_null;
1035 break;
1036 default:
1037 fprintf(stderr, "unsupported data link type %d\n",
1038 pcap_datalink(pcap_obj));
1039 return 1;
1040 break;
1041 }
1042 if (interactive) {
1043 init_curses();
1044 while (0 == Quit) {
1045 if (readfile_state < 2) {
1046 /*
1047 * On some OSes select() might return 0 even when
1048 * there are packets to process. Thus, we always
1049 * ignore its return value and just call pcap_dispatch()
1050 * anyway.
1051 */
1052 if (0 == readfile_state) /* interactive */
1053 pcap_select(pcap_obj, 1, 0);
1054 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1055 }
1056 if (0 == x && 1 == readfile_state) {
1057 /* block on keyboard until user quits */
1058 readfile_state++;
1059 nodelay(w, 0);
1060 }
1061 keyboard();
1062 cron_pre();
1063 report();
1064 cron_post();
1065 }
1066 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1067 } else {
1068 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1069 (void) 0;
1070 cron_pre();
1071 Sources_report(); print_func("\n");
1072 Destinatioreport(); print_func("\n");
1073 Qtypes_report(); print_func("\n");
1074 Opcodes_report(); print_func("\n");
1075 Tld_report(); print_func("\n");
1076 Sld_report(); print_func("\n");
1077 Nld_report(); print_func("\n");
1078 SldBySource_report();
1079 }
1081 pcap_close(pcap_obj);
1082 return 0;
1083 } /* static int main(int argc, char *argv[]) */
1084 #endif
1085 /*
1086 * vim:shiftwidth=4:tabstop=8:softtabstop=4
1087 */