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_sport
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 assert(ns > 0);
295 do {
296 if ((*off) >= sz)
297 break;
298 c = *(buf + (*off));
299 if (c > 191) {
300 /* blasted compression */
301 unsigned short s;
302 off_t ptr;
303 memcpy(&s, buf + (*off), sizeof(s));
304 s = ntohs(s);
305 (*off) += sizeof(s);
306 /* Sanity check */
307 if ((*off) >= sz)
308 return 1;
309 ptr = s & 0x3FFF;
310 /* Make sure the pointer is inside this message */
311 if (ptr >= sz)
312 return 2;
313 return rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
314 } else if (c > RFC1035_MAXLABELSZ) {
315 /*
316 * "(The 10 and 01 combinations are reserved for future use.)"
317 */
318 break;
319 return 3;
320 } else {
321 (*off)++;
322 len = (size_t) c;
323 if (len == 0)
324 break;
325 if (len > (ns - 1))
326 len = ns - 1;
327 if ((*off) + len > sz) /* message is too short */
328 return 4;
329 memcpy(name + no, buf + (*off), len);
330 (*off) += len;
331 no += len;
332 *(name + (no++)) = '.';
333 }
334 } while (c > 0);
335 *(name + no - 1) = '\0';
336 /* make sure we didn't allow someone to overflow the name buffer */
337 assert(no <= ns);
338 return 0;
339 }
341 static int
342 handle_dns(const char *buf, int len)
343 {
344 rfc1035_header_t qh;
345 uint16_t us;
346 off_t offset;
347 char *t;
348 int x;
350 /* The DNS header is 12 bytes long */
351 if (len < 12)
352 return 0;
354 memcpy(&us, buf + 0, 2);
355 qh.id = ntohs(us);
357 memcpy(&us, buf + 2, 2);
358 us = ntohs(us);
359 qh.qr = (us >> 15) & 0x01;
360 qh.opcode = (us >> 11) & 0x0F;
361 qh.aa = (us >> 10) & 0x01;
362 qh.tc = (us >> 9) & 0x01;
363 qh.rd = (us >> 8) & 0x01;
364 qh.ra = (us >> 7) & 0x01;
365 qh.z = (us >> 6) & 0x01;
366 qh.ad = (us >> 5) & 0x01;
367 qh.cd = (us >> 4) & 0x01;
368 qh.rcode = us & 0x0F;
370 memcpy(&us, buf + 4, 2);
371 qh.qdcount = ntohs(us);
373 memcpy(&us, buf + 6, 2);
374 qh.ancount = ntohs(us);
376 memcpy(&us, buf + 8, 2);
377 qh.nscount = ntohs(us);
379 memcpy(&us, buf + 10, 2);
380 qh.arcount = ntohs(us);
382 offset = 12;
383 memset(qh.qname, '\0', MAX_QNAME_SZ);
384 x = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
385 if (0 != x)
386 return 0;
387 if ('\0' == qh.qname[0])
388 sstrncpy (qh.qname, ".", sizeof (qh.qname));
389 while ((t = strchr(qh.qname, '\n')))
390 *t = ' ';
391 while ((t = strchr(qh.qname, '\r')))
392 *t = ' ';
393 for (t = qh.qname; *t; t++)
394 *t = tolower((int) *t);
396 memcpy(&us, buf + offset, 2);
397 qh.qtype = ntohs(us);
398 memcpy(&us, buf + offset + 2, 2);
399 qh.qclass = ntohs(us);
401 qh.length = (uint16_t) len;
403 /* gather stats */
404 qtype_counts[qh.qtype]++;
405 qclass_counts[qh.qclass]++;
406 opcode_counts[qh.opcode]++;
408 if (Callback != NULL)
409 Callback (&qh);
411 return 1;
412 }
414 static int
415 handle_udp(const struct udphdr *udp, int len)
416 {
417 char buf[PCAP_SNAPLEN];
418 if ((ntohs (udp->UDP_DEST) != 53)
419 && (ntohs (udp->UDP_SRC) != 53))
420 return 0;
421 memcpy(buf, udp + 1, len - sizeof(*udp));
422 if (0 == handle_dns(buf, len - sizeof(*udp)))
423 return 0;
424 return 1;
425 }
427 static int
428 handle_ipv6 (struct ip6_hdr *ipv6, int len)
429 {
430 char buf[PCAP_SNAPLEN];
431 unsigned int offset;
432 int nexthdr;
434 struct in6_addr c_src_addr;
435 uint16_t payload_len;
437 if (0 > len)
438 return (0);
440 offset = sizeof (struct ip6_hdr);
441 nexthdr = ipv6->ip6_nxt;
442 c_src_addr = ipv6->ip6_src;
443 payload_len = ntohs (ipv6->ip6_plen);
445 if (ignore_list_match (&c_src_addr))
446 return (0);
448 /* Parse extension headers. This only handles the standard headers, as
449 * defined in RFC 2460, correctly. Fragments are discarded. */
450 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
451 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
452 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
453 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
454 || (IPPROTO_AH == nexthdr) /* destination options. */
455 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
456 {
457 struct ip6_ext ext_hdr;
458 uint16_t ext_hdr_len;
460 /* Catch broken packets */
461 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
462 return (0);
464 /* Cannot handle fragments. */
465 if (IPPROTO_FRAGMENT == nexthdr)
466 return (0);
468 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
469 nexthdr = ext_hdr.ip6e_nxt;
470 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
472 /* This header is longer than the packets payload.. WTF? */
473 if (ext_hdr_len > payload_len)
474 return (0);
476 offset += ext_hdr_len;
477 payload_len -= ext_hdr_len;
478 } /* while */
480 /* Catch broken and empty packets */
481 if (((offset + payload_len) > (unsigned int)len)
482 || (payload_len == 0)
483 || (payload_len > PCAP_SNAPLEN))
484 return (0);
486 if (IPPROTO_UDP != nexthdr)
487 return (0);
489 memcpy (buf, (char *) ipv6 + offset, payload_len);
490 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
491 return (0);
493 return (1); /* Success */
494 } /* int handle_ipv6 */
496 static int
497 handle_ip(const struct ip *ip, int len)
498 {
499 char buf[PCAP_SNAPLEN];
500 int offset = ip->ip_hl << 2;
501 struct in6_addr c_src_addr;
502 struct in6_addr c_dst_addr;
504 if (ip->ip_v == 6)
505 return (handle_ipv6 ((struct ip6_hdr *) ip, len));
507 in6_addr_from_buffer (&c_src_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
508 in6_addr_from_buffer (&c_dst_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
509 if (ignore_list_match (&c_src_addr))
510 return (0);
511 if (IPPROTO_UDP != ip->ip_p)
512 return 0;
513 memcpy(buf, (void *) ip + offset, len - offset);
514 if (0 == handle_udp((struct udphdr *) buf, len - offset))
515 return 0;
516 return 1;
517 }
519 #if HAVE_NET_IF_PPP_H
520 static int
521 handle_ppp(const u_char * pkt, int len)
522 {
523 char buf[PCAP_SNAPLEN];
524 unsigned short us;
525 unsigned short proto;
526 if (len < 2)
527 return 0;
528 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
529 pkt += 2; /* ACFC not used */
530 len -= 2;
531 }
532 if (len < 2)
533 return 0;
534 if (*pkt % 2) {
535 proto = *pkt; /* PFC is used */
536 pkt++;
537 len--;
538 } else {
539 memcpy(&us, pkt, sizeof(us));
540 proto = ntohs(us);
541 pkt += 2;
542 len -= 2;
543 }
544 if (ETHERTYPE_IP != proto && PPP_IP != proto)
545 return 0;
546 memcpy(buf, pkt, len);
547 return handle_ip((struct ip *) buf, len);
548 }
549 #endif /* HAVE_NET_IF_PPP_H */
551 static int
552 handle_null(const u_char * pkt, int len)
553 {
554 unsigned int family;
555 memcpy(&family, pkt, sizeof(family));
556 if (AF_INET != family)
557 return 0;
558 return handle_ip((struct ip *) (pkt + 4), len - 4);
559 }
561 #ifdef DLT_LOOP
562 static int
563 handle_loop(const u_char * pkt, int len)
564 {
565 unsigned int family;
566 memcpy(&family, pkt, sizeof(family));
567 if (AF_INET != ntohl(family))
568 return 0;
569 return handle_ip((struct ip *) (pkt + 4), len - 4);
570 }
572 #endif
574 #ifdef DLT_RAW
575 static int
576 handle_raw(const u_char * pkt, int len)
577 {
578 return handle_ip((struct ip *) pkt, len);
579 }
581 #endif
583 static int
584 handle_ether(const u_char * pkt, int len)
585 {
586 char buf[PCAP_SNAPLEN];
587 struct ether_header *e = (void *) pkt;
588 unsigned short etype = ntohs(e->ether_type);
589 if (len < ETHER_HDR_LEN)
590 return 0;
591 pkt += ETHER_HDR_LEN;
592 len -= ETHER_HDR_LEN;
593 if (ETHERTYPE_8021Q == etype) {
594 etype = ntohs(*(unsigned short *) (pkt + 2));
595 pkt += 4;
596 len -= 4;
597 }
598 if ((ETHERTYPE_IP != etype)
599 && (ETHERTYPE_IPV6 != etype))
600 return 0;
601 memcpy(buf, pkt, len);
602 if (ETHERTYPE_IPV6 == etype)
603 return (handle_ipv6 ((struct ip6_hdr *) buf, len));
604 else
605 return handle_ip((struct ip *) buf, len);
606 }
608 #ifdef DLT_LINUX_SLL
609 static int
610 handle_linux_sll (const u_char *pkt, int len)
611 {
612 struct sll_header
613 {
614 uint16_t pkt_type;
615 uint16_t dev_type;
616 uint16_t addr_len;
617 uint8_t addr[8];
618 uint16_t proto_type;
619 } *hdr;
620 uint16_t etype;
622 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
623 return (0);
625 hdr = (struct sll_header *) pkt;
626 pkt = (u_char *) (hdr + 1);
627 len -= sizeof (struct sll_header);
629 etype = ntohs (hdr->proto_type);
631 if ((ETHERTYPE_IP != etype)
632 && (ETHERTYPE_IPV6 != etype))
633 return 0;
635 if (ETHERTYPE_IPV6 == etype)
636 return (handle_ipv6 ((struct ip6_hdr *) pkt, len));
637 else
638 return handle_ip((struct ip *) pkt, len);
639 }
640 #endif /* DLT_LINUX_SLL */
642 /* public function */
643 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
644 {
645 int status;
647 DEBUG ("handle_pcap (udata = %p, hdr = %p, pkt = %p): hdr->caplen = %i\n",
648 (void *) udata, (void *) hdr, (void *) pkt,
649 hdr->caplen);
651 if (hdr->caplen < ETHER_HDR_LEN)
652 return;
654 switch (pcap_datalink (pcap_obj))
655 {
656 case DLT_EN10MB:
657 status = handle_ether (pkt, hdr->caplen);
658 break;
659 #if HAVE_NET_IF_PPP_H
660 case DLT_PPP:
661 status = handle_ppp (pkt, hdr->caplen);
662 break;
663 #endif
664 #ifdef DLT_LOOP
665 case DLT_LOOP:
666 status = handle_loop (pkt, hdr->caplen);
667 break;
668 #endif
669 #ifdef DLT_RAW
670 case DLT_RAW:
671 status = handle_raw (pkt, hdr->caplen);
672 break;
673 #endif
674 #ifdef DLT_LINUX_SLL
675 case DLT_LINUX_SLL:
676 status = handle_linux_sll (pkt, hdr->caplen);
677 break;
678 #endif
679 case DLT_NULL:
680 status = handle_null (pkt, hdr->caplen);
681 break;
683 default:
684 ERROR ("handle_pcap: unsupported data link type %d\n",
685 pcap_datalink(pcap_obj));
686 status = 0;
687 break;
688 } /* switch (pcap_datalink(pcap_obj)) */
690 if (0 == status)
691 return;
693 query_count_intvl++;
694 query_count_total++;
695 last_ts = hdr->ts;
696 }
697 #endif /* HAVE_PCAP_H */
699 const char *qtype_str(int t)
700 {
701 static char buf[32];
702 switch (t) {
703 #if (defined (__NAMESER)) && (__NAMESER >= 19991001)
704 case ns_t_a: return ("A");
705 case ns_t_ns: return ("NS");
706 case ns_t_md: return ("MD");
707 case ns_t_mf: return ("MF");
708 case ns_t_cname: return ("CNAME");
709 case ns_t_soa: return ("SOA");
710 case ns_t_mb: return ("MB");
711 case ns_t_mg: return ("MG");
712 case ns_t_mr: return ("MR");
713 case ns_t_null: return ("NULL");
714 case ns_t_wks: return ("WKS");
715 case ns_t_ptr: return ("PTR");
716 case ns_t_hinfo: return ("HINFO");
717 case ns_t_minfo: return ("MINFO");
718 case ns_t_mx: return ("MX");
719 case ns_t_txt: return ("TXT");
720 case ns_t_rp: return ("RP");
721 case ns_t_afsdb: return ("AFSDB");
722 case ns_t_x25: return ("X25");
723 case ns_t_isdn: return ("ISDN");
724 case ns_t_rt: return ("RT");
725 case ns_t_nsap: return ("NSAP");
726 case ns_t_nsap_ptr: return ("NSAP-PTR");
727 case ns_t_sig: return ("SIG");
728 case ns_t_key: return ("KEY");
729 case ns_t_px: return ("PX");
730 case ns_t_gpos: return ("GPOS");
731 case ns_t_aaaa: return ("AAAA");
732 case ns_t_loc: return ("LOC");
733 case ns_t_nxt: return ("NXT");
734 case ns_t_eid: return ("EID");
735 case ns_t_nimloc: return ("NIMLOC");
736 case ns_t_srv: return ("SRV");
737 case ns_t_atma: return ("ATMA");
738 case ns_t_naptr: return ("NAPTR");
739 case ns_t_kx: return ("KX");
740 case ns_t_cert: return ("CERT");
741 case ns_t_a6: return ("A6");
742 case ns_t_dname: return ("DNAME");
743 case ns_t_sink: return ("SINK");
744 case ns_t_opt: return ("OPT");
745 # if __NAMESER >= 19991006
746 case ns_t_tsig: return ("TSIG");
747 # endif
748 case ns_t_ixfr: return ("IXFR");
749 case ns_t_axfr: return ("AXFR");
750 case ns_t_mailb: return ("MAILB");
751 case ns_t_maila: return ("MAILA");
752 case ns_t_any: return ("ANY");
753 case ns_t_zxfr: return ("ZXFR");
754 /* #endif __NAMESER >= 19991006 */
755 #elif (defined (__BIND)) && (__BIND >= 19950621)
756 case T_A: return ("A"); /* 1 ... */
757 case T_NS: return ("NS");
758 case T_MD: return ("MD");
759 case T_MF: return ("MF");
760 case T_CNAME: return ("CNAME");
761 case T_SOA: return ("SOA");
762 case T_MB: return ("MB");
763 case T_MG: return ("MG");
764 case T_MR: return ("MR");
765 case T_NULL: return ("NULL");
766 case T_WKS: return ("WKS");
767 case T_PTR: return ("PTR");
768 case T_HINFO: return ("HINFO");
769 case T_MINFO: return ("MINFO");
770 case T_MX: return ("MX");
771 case T_TXT: return ("TXT");
772 case T_RP: return ("RP");
773 case T_AFSDB: return ("AFSDB");
774 case T_X25: return ("X25");
775 case T_ISDN: return ("ISDN");
776 case T_RT: return ("RT");
777 case T_NSAP: return ("NSAP");
778 case T_NSAP_PTR: return ("NSAP_PTR");
779 case T_SIG: return ("SIG");
780 case T_KEY: return ("KEY");
781 case T_PX: return ("PX");
782 case T_GPOS: return ("GPOS");
783 case T_AAAA: return ("AAAA");
784 case T_LOC: return ("LOC");
785 case T_NXT: return ("NXT");
786 case T_EID: return ("EID");
787 case T_NIMLOC: return ("NIMLOC");
788 case T_SRV: return ("SRV");
789 case T_ATMA: return ("ATMA");
790 case T_NAPTR: return ("NAPTR"); /* ... 35 */
791 #if (__BIND >= 19960801)
792 case T_KX: return ("KX"); /* 36 ... */
793 case T_CERT: return ("CERT");
794 case T_A6: return ("A6");
795 case T_DNAME: return ("DNAME");
796 case T_SINK: return ("SINK");
797 case T_OPT: return ("OPT");
798 case T_APL: return ("APL");
799 case T_DS: return ("DS");
800 case T_SSHFP: return ("SSHFP");
801 case T_RRSIG: return ("RRSIG");
802 case T_NSEC: return ("NSEC");
803 case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
804 case T_TKEY: return ("TKEY"); /* 249 */
805 #endif /* __BIND >= 19960801 */
806 case T_TSIG: return ("TSIG"); /* 250 ... */
807 case T_IXFR: return ("IXFR");
808 case T_AXFR: return ("AXFR");
809 case T_MAILB: return ("MAILB");
810 case T_MAILA: return ("MAILA");
811 case T_ANY: return ("ANY"); /* ... 255 */
812 #endif /* __BIND >= 19950621 */
813 default:
814 ssnprintf (buf, sizeof (buf), "#%i", t);
815 return (buf);
816 }; /* switch (t) */
817 /* NOTREACHED */
818 return (NULL);
819 }
821 const char *opcode_str (int o)
822 {
823 static char buf[30];
824 switch (o) {
825 case 0:
826 return "Query";
827 break;
828 case 1:
829 return "Iquery";
830 break;
831 case 2:
832 return "Status";
833 break;
834 case 4:
835 return "Notify";
836 break;
837 case 5:
838 return "Update";
839 break;
840 default:
841 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
842 return buf;
843 }
844 /* NOTREACHED */
845 }
847 const char *rcode_str (int rcode)
848 {
849 static char buf[32];
850 switch (rcode)
851 {
852 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
853 case ns_r_noerror: return ("NOERROR");
854 case ns_r_formerr: return ("FORMERR");
855 case ns_r_servfail: return ("SERVFAIL");
856 case ns_r_nxdomain: return ("NXDOMAIN");
857 case ns_r_notimpl: return ("NOTIMPL");
858 case ns_r_refused: return ("REFUSED");
859 case ns_r_yxdomain: return ("YXDOMAIN");
860 case ns_r_yxrrset: return ("YXRRSET");
861 case ns_r_nxrrset: return ("NXRRSET");
862 case ns_r_notauth: return ("NOTAUTH");
863 case ns_r_notzone: return ("NOTZONE");
864 case ns_r_max: return ("MAX");
865 case ns_r_badsig: return ("BADSIG");
866 case ns_r_badkey: return ("BADKEY");
867 case ns_r_badtime: return ("BADTIME");
868 /* #endif __NAMESER >= 19991006 */
869 #elif (defined (__BIND)) && (__BIND >= 19950621)
870 case NOERROR: return ("NOERROR");
871 case FORMERR: return ("FORMERR");
872 case SERVFAIL: return ("SERVFAIL");
873 case NXDOMAIN: return ("NXDOMAIN");
874 case NOTIMP: return ("NOTIMP");
875 case REFUSED: return ("REFUSED");
876 #if defined (YXDOMAIN) && defined (NXRRSET)
877 case YXDOMAIN: return ("YXDOMAIN");
878 case YXRRSET: return ("YXRRSET");
879 case NXRRSET: return ("NXRRSET");
880 case NOTAUTH: return ("NOTAUTH");
881 case NOTZONE: return ("NOTZONE");
882 #endif /* RFC2136 rcodes */
883 #endif /* __BIND >= 19950621 */
884 default:
885 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
886 return (buf);
887 }
888 /* Never reached */
889 return (NULL);
890 } /* const char *rcode_str (int rcode) */
892 #if 0
893 static int
894 main(int argc, char *argv[])
895 {
896 char errbuf[PCAP_ERRBUF_SIZE];
897 int x;
898 struct stat sb;
899 int readfile_state = 0;
900 struct bpf_program fp;
902 port53 = htons(53);
903 SubReport = Sources_report;
904 ignore_addr.s_addr = 0;
905 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
906 srandom(time(NULL));
907 ResetCounters();
909 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
910 switch (x) {
911 case 'a':
912 anon_flag = 1;
913 break;
914 case 's':
915 sld_flag = 1;
916 break;
917 case 't':
918 nld_flag = 1;
919 break;
920 case 'p':
921 promisc_flag = 0;
922 break;
923 case 'b':
924 bpf_program_str = strdup(optarg);
925 break;
926 case 'i':
927 ignore_addr.s_addr = inet_addr(optarg);
928 break;
929 case 'f':
930 set_filter(optarg);
931 break;
932 default:
933 usage();
934 break;
935 }
936 }
937 argc -= optind;
938 argv += optind;
940 if (argc < 1)
941 usage();
942 device = strdup(argv[0]);
944 if (0 == stat(device, &sb))
945 readfile_state = 1;
946 if (readfile_state) {
947 pcap_obj = pcap_open_offline(device, errbuf);
948 } else {
949 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
950 }
951 if (NULL == pcap_obj) {
952 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
953 exit(1);
954 }
956 if (0 == isatty(1)) {
957 if (0 == readfile_state) {
958 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
959 exit(1);
960 }
961 interactive = 0;
962 print_func = printf;
963 }
965 memset(&fp, '\0', sizeof(fp));
966 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
967 if (x < 0) {
968 fprintf(stderr, "pcap_compile failed\n");
969 exit(1);
970 }
971 x = pcap_setfilter(pcap_obj, &fp);
972 if (x < 0) {
973 fprintf(stderr, "pcap_setfilter failed\n");
974 exit(1);
975 }
977 /*
978 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
979 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
980 */
981 x = pcap_setnonblock(pcap_obj, 1, errbuf);
982 if (x < 0) {
983 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
984 exit(1);
985 }
987 switch (pcap_datalink(pcap_obj)) {
988 case DLT_EN10MB:
989 handle_datalink = handle_ether;
990 break;
991 #if HAVE_NET_IF_PPP_H
992 case DLT_PPP:
993 handle_datalink = handle_ppp;
994 break;
995 #endif
996 #ifdef DLT_LOOP
997 case DLT_LOOP:
998 handle_datalink = handle_loop;
999 break;
1000 #endif
1001 #ifdef DLT_RAW
1002 case DLT_RAW:
1003 handle_datalink = handle_raw;
1004 break;
1005 #endif
1006 case DLT_NULL:
1007 handle_datalink = handle_null;
1008 break;
1009 default:
1010 fprintf(stderr, "unsupported data link type %d\n",
1011 pcap_datalink(pcap_obj));
1012 return 1;
1013 break;
1014 }
1015 if (interactive) {
1016 init_curses();
1017 while (0 == Quit) {
1018 if (readfile_state < 2) {
1019 /*
1020 * On some OSes select() might return 0 even when
1021 * there are packets to process. Thus, we always
1022 * ignore its return value and just call pcap_dispatch()
1023 * anyway.
1024 */
1025 if (0 == readfile_state) /* interactive */
1026 pcap_select(pcap_obj, 1, 0);
1027 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1028 }
1029 if (0 == x && 1 == readfile_state) {
1030 /* block on keyboard until user quits */
1031 readfile_state++;
1032 nodelay(w, 0);
1033 }
1034 keyboard();
1035 cron_pre();
1036 report();
1037 cron_post();
1038 }
1039 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1040 } else {
1041 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1042 (void) 0;
1043 cron_pre();
1044 Sources_report(); print_func("\n");
1045 Destinatioreport(); print_func("\n");
1046 Qtypes_report(); print_func("\n");
1047 Opcodes_report(); print_func("\n");
1048 Tld_report(); print_func("\n");
1049 Sld_report(); print_func("\n");
1050 Nld_report(); print_func("\n");
1051 SldBySource_report();
1052 }
1054 pcap_close(pcap_obj);
1055 return 0;
1056 } /* static int main(int argc, char *argv[]) */
1057 #endif
1058 /*
1059 * vim:shiftwidth=4:tabstop=8:softtabstop=4
1060 */