1 /*
2 * collectd - src/utils_dns.c
3 * 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 collectd.org>
34 */
36 #define _DEFAULT_SOURCE
37 #define _BSD_SOURCE
39 #include "collectd.h"
41 #include "plugin.h"
42 #include "common.h"
44 #if HAVE_NET_IF_ARP_H
45 # include <net/if_arp.h>
46 #endif
47 #if HAVE_NET_IF_H
48 # include <net/if.h>
49 #endif
50 #if HAVE_NET_PPP_DEFS_H
51 # include <net/ppp_defs.h>
52 #endif
53 #if HAVE_NET_IF_PPP_H
54 # include <net/if_ppp.h>
55 #endif
57 #if HAVE_NETINET_IN_SYSTM_H
58 # include <netinet/in_systm.h>
59 #endif
60 #if HAVE_NETINET_IN_H
61 # include <netinet/in.h>
62 #endif
63 #if HAVE_NETINET_IP6_H
64 # include <netinet/ip6.h>
65 #endif
66 #if HAVE_NETINET_IF_ETHER_H
67 # include <netinet/if_ether.h>
68 #endif
69 #if HAVE_NETINET_IP_H
70 # include <netinet/ip.h>
71 #endif
72 #ifdef HAVE_NETINET_IP_VAR_H
73 # include <netinet/ip_var.h>
74 #endif
75 #if HAVE_NETINET_UDP_H
76 # include <netinet/udp.h>
77 #endif
79 #if HAVE_ARPA_INET_H
80 # include <arpa/inet.h>
81 #endif
82 #if HAVE_ARPA_NAMESER_H
83 # include <arpa/nameser.h>
84 #endif
85 #if HAVE_ARPA_NAMESER_COMPAT_H
86 # include <arpa/nameser_compat.h>
87 #endif
89 #if HAVE_NETDB_H
90 # include <netdb.h>
91 #endif
93 #if HAVE_PCAP_H
94 # include <pcap.h>
95 #endif
97 #define PCAP_SNAPLEN 1460
98 #ifndef ETHER_HDR_LEN
99 #define ETHER_ADDR_LEN 6
100 #define ETHER_TYPE_LEN 2
101 #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
102 #endif
103 #ifndef ETHERTYPE_8021Q
104 # define ETHERTYPE_8021Q 0x8100
105 #endif
106 #ifndef ETHERTYPE_IPV6
107 # define ETHERTYPE_IPV6 0x86DD
108 #endif
110 #ifndef PPP_ADDRESS_VAL
111 # define PPP_ADDRESS_VAL 0xff /* The address byte value */
112 #endif
113 #ifndef PPP_CONTROL_VAL
114 # define PPP_CONTROL_VAL 0x03 /* The control byte value */
115 #endif
117 #if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
118 # define UDP_DEST uh_dport
119 # define UDP_SRC uh_sport
120 #elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
121 # define UDP_DEST dest
122 # define UDP_SRC source
123 #else
124 # error "`struct udphdr' is unusable."
125 #endif
127 #if HAVE_NETINET_IP6_H && HAVE_STRUCT_IP6_EXT
128 # define HAVE_IPV6 1
129 #endif
131 #include "utils_dns.h"
133 /*
134 * Type definitions
135 */
136 struct ip_list_s
137 {
138 struct in6_addr addr;
139 void *data;
140 struct ip_list_s *next;
141 };
142 typedef struct ip_list_s ip_list_t;
144 typedef int (printer)(const char *, ...);
146 /*
147 * flags/features for non-interactive mode
148 */
150 #ifndef T_A6
151 #define T_A6 38
152 #endif
153 #ifndef T_SRV
154 #define T_SRV 33
155 #endif
157 /*
158 * Global variables
159 */
161 #if HAVE_PCAP_H
162 static pcap_t *pcap_obj = NULL;
163 #endif
165 static ip_list_t *IgnoreList = NULL;
167 #if HAVE_PCAP_H
168 static void (*Callback) (const rfc1035_header_t *) = NULL;
170 static int query_count_intvl = 0;
171 static int query_count_total = 0;
172 # ifdef __OpenBSD__
173 static struct bpf_timeval last_ts;
174 # else
175 static struct timeval last_ts;
176 # endif /* __OpenBSD__ */
177 #endif /* HAVE_PCAP_H */
179 static int cmp_in6_addr (const struct in6_addr *a,
180 const struct in6_addr *b)
181 {
182 int i;
184 assert (sizeof (struct in6_addr) == 16);
186 for (i = 0; i < 16; i++)
187 if (a->s6_addr[i] != b->s6_addr[i])
188 break;
190 if (i >= 16)
191 return (0);
193 return (a->s6_addr[i] > b->s6_addr[i] ? 1 : -1);
194 } /* int cmp_addrinfo */
196 static inline int ignore_list_match (const struct in6_addr *addr)
197 {
198 for (ip_list_t *ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
199 if (cmp_in6_addr (addr, &ptr->addr) == 0)
200 return (1);
201 return (0);
202 } /* int ignore_list_match */
204 static void ignore_list_add (const struct in6_addr *addr)
205 {
206 ip_list_t *new;
208 if (ignore_list_match (addr) != 0)
209 return;
211 new = malloc (sizeof (*new));
212 if (new == NULL)
213 {
214 perror ("malloc");
215 return;
216 }
218 memcpy (&new->addr, addr, sizeof (struct in6_addr));
219 new->next = IgnoreList;
221 IgnoreList = new;
222 } /* void ignore_list_add */
224 void ignore_list_add_name (const char *name)
225 {
226 struct addrinfo *ai_list;
227 struct in6_addr addr;
228 int status;
230 status = getaddrinfo (name, NULL, NULL, &ai_list);
231 if (status != 0)
232 return;
234 for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
235 {
236 if (ai_ptr->ai_family == AF_INET)
237 {
238 memset (&addr, '\0', sizeof (addr));
239 addr.s6_addr[10] = 0xFF;
240 addr.s6_addr[11] = 0xFF;
241 memcpy (addr.s6_addr + 12, &((struct sockaddr_in *) ai_ptr->ai_addr)->sin_addr, 4);
243 ignore_list_add (&addr);
244 }
245 else
246 {
247 ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
248 }
249 } /* for */
251 freeaddrinfo (ai_list);
252 }
254 #if HAVE_PCAP_H
255 static void in6_addr_from_buffer (struct in6_addr *ia,
256 const void *buf, size_t buf_len,
257 int family)
258 {
259 memset (ia, 0, sizeof (struct in6_addr));
260 if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
261 {
262 ia->s6_addr[10] = 0xFF;
263 ia->s6_addr[11] = 0xFF;
264 memcpy (ia->s6_addr + 12, buf, buf_len);
265 }
266 else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
267 {
268 memcpy (ia, buf, buf_len);
269 }
270 } /* void in6_addr_from_buffer */
272 void dnstop_set_pcap_obj (pcap_t *po)
273 {
274 pcap_obj = po;
275 }
277 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
278 {
279 Callback = cb;
280 }
282 #define RFC1035_MAXLABELSZ 63
283 static int
284 rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns)
285 {
286 off_t no = 0;
287 unsigned char c;
288 size_t len;
289 static int loop_detect = 0;
290 if (loop_detect > 2)
291 return 4; /* compression loop */
292 if (ns == 0)
293 return 4; /* probably compression loop */
294 do {
295 if ((*off) >= ((off_t) sz))
296 break;
297 c = *(buf + (*off));
298 if (c > 191) {
299 /* blasted compression */
300 int rc;
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) >= ((off_t) sz))
308 return 1; /* message too short */
309 ptr = s & 0x3FFF;
310 /* Make sure the pointer is inside this message */
311 if (ptr >= ((off_t) sz))
312 return 2; /* bad compression ptr */
313 if (ptr < DNS_MSG_HDR_SZ)
314 return 2; /* bad compression ptr */
315 loop_detect++;
316 rc = rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
317 loop_detect--;
318 return rc;
319 } else if (c > RFC1035_MAXLABELSZ) {
320 /*
321 * "(The 10 and 01 combinations are reserved for future use.)"
322 */
323 return 3; /* reserved label/compression flags */
324 } else {
325 (*off)++;
326 len = (size_t) c;
327 if (len == 0)
328 break;
329 if (len > (ns - 1))
330 len = ns - 1;
331 if ((*off) + len > sz)
332 return 4; /* message is too short */
333 if (no + len + 1 > ns)
334 return 5; /* qname would overflow name buffer */
335 memcpy(name + no, buf + (*off), len);
336 (*off) += len;
337 no += len;
338 *(name + (no++)) = '.';
339 }
340 } while (c > 0);
341 if (no > 0)
342 *(name + no - 1) = '\0';
343 /* make sure we didn't allow someone to overflow the name buffer */
344 assert(no <= ((off_t) ns));
345 return 0;
346 }
348 static int
349 handle_dns(const char *buf, int len)
350 {
351 rfc1035_header_t qh;
352 uint16_t us;
353 off_t offset;
354 char *t;
355 int status;
357 /* The DNS header is 12 bytes long */
358 if (len < DNS_MSG_HDR_SZ)
359 return 0;
361 memcpy(&us, buf + 0, 2);
362 qh.id = ntohs(us);
364 memcpy(&us, buf + 2, 2);
365 us = ntohs(us);
366 qh.qr = (us >> 15) & 0x01;
367 qh.opcode = (us >> 11) & 0x0F;
368 qh.aa = (us >> 10) & 0x01;
369 qh.tc = (us >> 9) & 0x01;
370 qh.rd = (us >> 8) & 0x01;
371 qh.ra = (us >> 7) & 0x01;
372 qh.z = (us >> 6) & 0x01;
373 qh.ad = (us >> 5) & 0x01;
374 qh.cd = (us >> 4) & 0x01;
375 qh.rcode = us & 0x0F;
377 memcpy(&us, buf + 4, 2);
378 qh.qdcount = ntohs(us);
380 memcpy(&us, buf + 6, 2);
381 qh.ancount = ntohs(us);
383 memcpy(&us, buf + 8, 2);
384 qh.nscount = ntohs(us);
386 memcpy(&us, buf + 10, 2);
387 qh.arcount = ntohs(us);
389 offset = DNS_MSG_HDR_SZ;
390 memset(qh.qname, '\0', MAX_QNAME_SZ);
391 status = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
392 if (status != 0)
393 {
394 INFO ("utils_dns: handle_dns: rfc1035NameUnpack failed "
395 "with status %i.", status);
396 return 0;
397 }
398 if ('\0' == qh.qname[0])
399 sstrncpy (qh.qname, ".", sizeof (qh.qname));
400 while ((t = strchr(qh.qname, '\n')))
401 *t = ' ';
402 while ((t = strchr(qh.qname, '\r')))
403 *t = ' ';
404 for (t = qh.qname; *t; t++)
405 *t = tolower((int) *t);
407 memcpy(&us, buf + offset, 2);
408 qh.qtype = ntohs(us);
409 memcpy(&us, buf + offset + 2, 2);
410 qh.qclass = ntohs(us);
412 qh.length = (uint16_t) len;
414 if (Callback != NULL)
415 Callback (&qh);
417 return 1;
418 }
420 static int
421 handle_udp(const struct udphdr *udp, int len)
422 {
423 char buf[PCAP_SNAPLEN];
424 if ((ntohs (udp->UDP_DEST) != 53)
425 && (ntohs (udp->UDP_SRC) != 53))
426 return 0;
427 memcpy(buf, udp + 1, len - sizeof(*udp));
428 if (0 == handle_dns(buf, len - sizeof(*udp)))
429 return 0;
430 return 1;
431 }
433 #if HAVE_IPV6
434 static int
435 handle_ipv6 (struct ip6_hdr *ipv6, int len)
436 {
437 char buf[PCAP_SNAPLEN];
438 unsigned int offset;
439 int nexthdr;
441 struct in6_addr c_src_addr;
442 uint16_t payload_len;
444 if (0 > len)
445 return (0);
447 offset = sizeof (struct ip6_hdr);
448 nexthdr = ipv6->ip6_nxt;
449 c_src_addr = ipv6->ip6_src;
450 payload_len = ntohs (ipv6->ip6_plen);
452 if (ignore_list_match (&c_src_addr))
453 return (0);
455 /* Parse extension headers. This only handles the standard headers, as
456 * defined in RFC 2460, correctly. Fragments are discarded. */
457 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
458 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
459 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
460 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
461 || (IPPROTO_AH == nexthdr) /* destination options. */
462 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
463 {
464 struct ip6_ext ext_hdr;
465 uint16_t ext_hdr_len;
467 /* Catch broken packets */
468 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
469 return (0);
471 /* Cannot handle fragments. */
472 if (IPPROTO_FRAGMENT == nexthdr)
473 return (0);
475 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
476 nexthdr = ext_hdr.ip6e_nxt;
477 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
479 /* This header is longer than the packets payload.. WTF? */
480 if (ext_hdr_len > payload_len)
481 return (0);
483 offset += ext_hdr_len;
484 payload_len -= ext_hdr_len;
485 } /* while */
487 /* Catch broken and empty packets */
488 if (((offset + payload_len) > (unsigned int)len)
489 || (payload_len == 0)
490 || (payload_len > PCAP_SNAPLEN))
491 return (0);
493 if (IPPROTO_UDP != nexthdr)
494 return (0);
496 memcpy (buf, (char *) ipv6 + offset, payload_len);
497 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
498 return (0);
500 return (1); /* Success */
501 } /* int handle_ipv6 */
502 /* #endif HAVE_IPV6 */
504 #else /* if !HAVE_IPV6 */
505 static int
506 handle_ipv6 (__attribute__((unused)) void *pkg,
507 __attribute__((unused)) int len)
508 {
509 return (0);
510 }
511 #endif /* !HAVE_IPV6 */
513 static int
514 handle_ip(const struct ip *ip, int len)
515 {
516 char buf[PCAP_SNAPLEN];
517 int offset = ip->ip_hl << 2;
518 struct in6_addr c_src_addr;
519 struct in6_addr c_dst_addr;
521 if (ip->ip_v == 6)
522 return (handle_ipv6 ((void *) ip, len));
524 in6_addr_from_buffer (&c_src_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
525 in6_addr_from_buffer (&c_dst_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
526 if (ignore_list_match (&c_src_addr))
527 return (0);
528 if (IPPROTO_UDP != ip->ip_p)
529 return 0;
530 memcpy(buf, ((char *)ip) + offset, len - offset);
531 if (0 == handle_udp((struct udphdr *) buf, len - offset))
532 return 0;
533 return 1;
534 }
536 #if HAVE_NET_IF_PPP_H
537 static int
538 handle_ppp(const u_char * pkt, int len)
539 {
540 char buf[PCAP_SNAPLEN];
541 unsigned short us;
542 unsigned short proto;
543 if (len < 2)
544 return 0;
545 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
546 pkt += 2; /* ACFC not used */
547 len -= 2;
548 }
549 if (len < 2)
550 return 0;
551 if (*pkt % 2) {
552 proto = *pkt; /* PFC is used */
553 pkt++;
554 len--;
555 } else {
556 memcpy(&us, pkt, sizeof(us));
557 proto = ntohs(us);
558 pkt += 2;
559 len -= 2;
560 }
561 if (ETHERTYPE_IP != proto && PPP_IP != proto)
562 return 0;
563 memcpy(buf, pkt, len);
564 return handle_ip((struct ip *) buf, len);
565 }
566 #endif /* HAVE_NET_IF_PPP_H */
568 static int
569 handle_null(const u_char * pkt, int len)
570 {
571 unsigned int family;
572 memcpy(&family, pkt, sizeof(family));
573 if (AF_INET != family)
574 return 0;
575 return handle_ip((struct ip *) (pkt + 4), len - 4);
576 }
578 #ifdef DLT_LOOP
579 static int
580 handle_loop(const u_char * pkt, int len)
581 {
582 unsigned int family;
583 memcpy(&family, pkt, sizeof(family));
584 if (AF_INET != ntohl(family))
585 return 0;
586 return handle_ip((struct ip *) (pkt + 4), len - 4);
587 }
589 #endif
591 #ifdef DLT_RAW
592 static int
593 handle_raw(const u_char * pkt, int len)
594 {
595 return handle_ip((struct ip *) pkt, len);
596 }
598 #endif
600 static int
601 handle_ether(const u_char * pkt, int len)
602 {
603 char buf[PCAP_SNAPLEN];
604 struct ether_header *e = (void *) pkt;
605 unsigned short etype = ntohs(e->ether_type);
606 if (len < ETHER_HDR_LEN)
607 return 0;
608 pkt += ETHER_HDR_LEN;
609 len -= ETHER_HDR_LEN;
610 if (ETHERTYPE_8021Q == etype) {
611 etype = ntohs(*(unsigned short *) (pkt + 2));
612 pkt += 4;
613 len -= 4;
614 }
615 if ((ETHERTYPE_IP != etype)
616 && (ETHERTYPE_IPV6 != etype))
617 return 0;
618 memcpy(buf, pkt, len);
619 if (ETHERTYPE_IPV6 == etype)
620 return (handle_ipv6 ((void *) buf, len));
621 else
622 return handle_ip((struct ip *) buf, len);
623 }
625 #ifdef DLT_LINUX_SLL
626 static int
627 handle_linux_sll (const u_char *pkt, int len)
628 {
629 struct sll_header
630 {
631 uint16_t pkt_type;
632 uint16_t dev_type;
633 uint16_t addr_len;
634 uint8_t addr[8];
635 uint16_t proto_type;
636 } *hdr;
637 uint16_t etype;
639 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
640 return (0);
642 hdr = (struct sll_header *) pkt;
643 pkt = (u_char *) (hdr + 1);
644 len -= sizeof (struct sll_header);
646 etype = ntohs (hdr->proto_type);
648 if ((ETHERTYPE_IP != etype)
649 && (ETHERTYPE_IPV6 != etype))
650 return 0;
652 if (ETHERTYPE_IPV6 == etype)
653 return (handle_ipv6 ((void *) pkt, len));
654 else
655 return handle_ip((struct ip *) pkt, len);
656 }
657 #endif /* DLT_LINUX_SLL */
659 /* public function */
660 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
661 {
662 int status;
664 if (hdr->caplen < ETHER_HDR_LEN)
665 return;
667 switch (pcap_datalink (pcap_obj))
668 {
669 case DLT_EN10MB:
670 status = handle_ether (pkt, hdr->caplen);
671 break;
672 #if HAVE_NET_IF_PPP_H
673 case DLT_PPP:
674 status = handle_ppp (pkt, hdr->caplen);
675 break;
676 #endif
677 #ifdef DLT_LOOP
678 case DLT_LOOP:
679 status = handle_loop (pkt, hdr->caplen);
680 break;
681 #endif
682 #ifdef DLT_RAW
683 case DLT_RAW:
684 status = handle_raw (pkt, hdr->caplen);
685 break;
686 #endif
687 #ifdef DLT_LINUX_SLL
688 case DLT_LINUX_SLL:
689 status = handle_linux_sll (pkt, hdr->caplen);
690 break;
691 #endif
692 case DLT_NULL:
693 status = handle_null (pkt, hdr->caplen);
694 break;
696 default:
697 ERROR ("handle_pcap: unsupported data link type %d",
698 pcap_datalink(pcap_obj));
699 status = 0;
700 break;
701 } /* switch (pcap_datalink(pcap_obj)) */
703 if (0 == status)
704 return;
706 query_count_intvl++;
707 query_count_total++;
708 last_ts = hdr->ts;
709 }
710 #endif /* HAVE_PCAP_H */
712 const char *qtype_str(int t)
713 {
714 static char buf[32];
715 switch (t) {
716 #if (defined (__NAMESER)) && (__NAMESER >= 19991001)
717 case ns_t_a: return ("A");
718 case ns_t_ns: return ("NS");
719 case ns_t_md: return ("MD");
720 case ns_t_mf: return ("MF");
721 case ns_t_cname: return ("CNAME");
722 case ns_t_soa: return ("SOA");
723 case ns_t_mb: return ("MB");
724 case ns_t_mg: return ("MG");
725 case ns_t_mr: return ("MR");
726 case ns_t_null: return ("NULL");
727 case ns_t_wks: return ("WKS");
728 case ns_t_ptr: return ("PTR");
729 case ns_t_hinfo: return ("HINFO");
730 case ns_t_minfo: return ("MINFO");
731 case ns_t_mx: return ("MX");
732 case ns_t_txt: return ("TXT");
733 case ns_t_rp: return ("RP");
734 case ns_t_afsdb: return ("AFSDB");
735 case ns_t_x25: return ("X25");
736 case ns_t_isdn: return ("ISDN");
737 case ns_t_rt: return ("RT");
738 case ns_t_nsap: return ("NSAP");
739 case ns_t_nsap_ptr: return ("NSAP-PTR");
740 case ns_t_sig: return ("SIG");
741 case ns_t_key: return ("KEY");
742 case ns_t_px: return ("PX");
743 case ns_t_gpos: return ("GPOS");
744 case ns_t_aaaa: return ("AAAA");
745 case ns_t_loc: return ("LOC");
746 case ns_t_nxt: return ("NXT");
747 case ns_t_eid: return ("EID");
748 case ns_t_nimloc: return ("NIMLOC");
749 case ns_t_srv: return ("SRV");
750 case ns_t_atma: return ("ATMA");
751 case ns_t_naptr: return ("NAPTR");
752 case ns_t_opt: return ("OPT");
753 # if __NAMESER >= 19991006
754 case ns_t_kx: return ("KX");
755 case ns_t_cert: return ("CERT");
756 case ns_t_a6: return ("A6");
757 case ns_t_dname: return ("DNAME");
758 case ns_t_sink: return ("SINK");
759 case ns_t_tsig: return ("TSIG");
760 # endif
761 # if __NAMESER >= 20090302
762 case ns_t_apl: return ("APL");
763 case ns_t_ds: return ("DS");
764 case ns_t_sshfp: return ("SSHFP");
765 case ns_t_ipseckey: return ("IPSECKEY");
766 case ns_t_rrsig: return ("RRSIG");
767 case ns_t_nsec: return ("NSEC");
768 case ns_t_dnskey: return ("DNSKEY");
769 case ns_t_dhcid: return ("DHCID");
770 case ns_t_nsec3: return ("NSEC3");
771 case ns_t_nsec3param: return ("NSEC3PARAM");
772 case ns_t_hip: return ("HIP");
773 case ns_t_spf: return ("SPF");
774 case ns_t_ixfr: return ("IXFR");
775 # endif
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 # if __NAMESER >= 19991006
781 case ns_t_zxfr: return ("ZXFR");
782 # endif
783 # if __NAMESER >= 20090302
784 case ns_t_dlv: return ("DLV");
785 # endif
786 /* #endif __NAMESER >= 19991001 */
787 #elif (defined (__BIND)) && (__BIND >= 19950621)
788 case T_A: return ("A"); /* 1 ... */
789 case T_NS: return ("NS");
790 case T_MD: return ("MD");
791 case T_MF: return ("MF");
792 case T_CNAME: return ("CNAME");
793 case T_SOA: return ("SOA");
794 case T_MB: return ("MB");
795 case T_MG: return ("MG");
796 case T_MR: return ("MR");
797 case T_NULL: return ("NULL");
798 case T_WKS: return ("WKS");
799 case T_PTR: return ("PTR");
800 case T_HINFO: return ("HINFO");
801 case T_MINFO: return ("MINFO");
802 case T_MX: return ("MX");
803 case T_TXT: return ("TXT");
804 case T_RP: return ("RP");
805 case T_AFSDB: return ("AFSDB");
806 case T_X25: return ("X25");
807 case T_ISDN: return ("ISDN");
808 case T_RT: return ("RT");
809 case T_NSAP: return ("NSAP");
810 case T_NSAP_PTR: return ("NSAP_PTR");
811 case T_SIG: return ("SIG");
812 case T_KEY: return ("KEY");
813 case T_PX: return ("PX");
814 case T_GPOS: return ("GPOS");
815 case T_AAAA: return ("AAAA");
816 case T_LOC: return ("LOC");
817 case T_NXT: return ("NXT");
818 case T_EID: return ("EID");
819 case T_NIMLOC: return ("NIMLOC");
820 case T_SRV: return ("SRV");
821 case T_ATMA: return ("ATMA");
822 case T_NAPTR: return ("NAPTR"); /* ... 35 */
823 #if (__BIND >= 19960801)
824 case T_KX: return ("KX"); /* 36 ... */
825 case T_CERT: return ("CERT");
826 case T_A6: return ("A6");
827 case T_DNAME: return ("DNAME");
828 case T_SINK: return ("SINK");
829 case T_OPT: return ("OPT");
830 case T_APL: return ("APL");
831 case T_DS: return ("DS");
832 case T_SSHFP: return ("SSHFP");
833 case T_RRSIG: return ("RRSIG");
834 case T_NSEC: return ("NSEC");
835 case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
836 case T_TKEY: return ("TKEY"); /* 249 */
837 #endif /* __BIND >= 19960801 */
838 case T_TSIG: return ("TSIG"); /* 250 ... */
839 case T_IXFR: return ("IXFR");
840 case T_AXFR: return ("AXFR");
841 case T_MAILB: return ("MAILB");
842 case T_MAILA: return ("MAILA");
843 case T_ANY: return ("ANY"); /* ... 255 */
844 #endif /* __BIND >= 19950621 */
845 default:
846 ssnprintf (buf, sizeof (buf), "#%i", t);
847 return (buf);
848 } /* switch (t) */
849 }
851 const char *opcode_str (int o)
852 {
853 static char buf[30];
854 switch (o) {
855 case 0:
856 return "Query";
857 case 1:
858 return "Iquery";
859 case 2:
860 return "Status";
861 case 4:
862 return "Notify";
863 case 5:
864 return "Update";
865 default:
866 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
867 return buf;
868 }
869 }
871 const char *rcode_str (int rcode)
872 {
873 static char buf[32];
874 switch (rcode)
875 {
876 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
877 case ns_r_noerror: return ("NOERROR");
878 case ns_r_formerr: return ("FORMERR");
879 case ns_r_servfail: return ("SERVFAIL");
880 case ns_r_nxdomain: return ("NXDOMAIN");
881 case ns_r_notimpl: return ("NOTIMPL");
882 case ns_r_refused: return ("REFUSED");
883 case ns_r_yxdomain: return ("YXDOMAIN");
884 case ns_r_yxrrset: return ("YXRRSET");
885 case ns_r_nxrrset: return ("NXRRSET");
886 case ns_r_notauth: return ("NOTAUTH");
887 case ns_r_notzone: return ("NOTZONE");
888 case ns_r_max: return ("MAX");
889 case ns_r_badsig: return ("BADSIG");
890 case ns_r_badkey: return ("BADKEY");
891 case ns_r_badtime: return ("BADTIME");
892 /* #endif __NAMESER >= 19991006 */
893 #elif (defined (__BIND)) && (__BIND >= 19950621)
894 case NOERROR: return ("NOERROR");
895 case FORMERR: return ("FORMERR");
896 case SERVFAIL: return ("SERVFAIL");
897 case NXDOMAIN: return ("NXDOMAIN");
898 case NOTIMP: return ("NOTIMP");
899 case REFUSED: return ("REFUSED");
900 #if defined (YXDOMAIN) && defined (NXRRSET)
901 case YXDOMAIN: return ("YXDOMAIN");
902 case YXRRSET: return ("YXRRSET");
903 case NXRRSET: return ("NXRRSET");
904 case NOTAUTH: return ("NOTAUTH");
905 case NOTZONE: return ("NOTZONE");
906 #endif /* RFC2136 rcodes */
907 #endif /* __BIND >= 19950621 */
908 default:
909 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
910 return (buf);
911 }
912 } /* const char *rcode_str (int rcode) */
914 #if 0
915 static int
916 main(int argc, char *argv[])
917 {
918 char errbuf[PCAP_ERRBUF_SIZE];
919 int x;
920 struct stat sb;
921 int readfile_state = 0;
922 struct bpf_program fp;
924 port53 = htons(53);
925 SubReport = Sources_report;
926 ignore_addr.s_addr = 0;
927 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
928 srandom(time(NULL));
929 ResetCounters();
931 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
932 switch (x) {
933 case 'a':
934 anon_flag = 1;
935 break;
936 case 's':
937 sld_flag = 1;
938 break;
939 case 't':
940 nld_flag = 1;
941 break;
942 case 'p':
943 promisc_flag = 0;
944 break;
945 case 'b':
946 bpf_program_str = strdup(optarg);
947 break;
948 case 'i':
949 ignore_addr.s_addr = inet_addr(optarg);
950 break;
951 case 'f':
952 set_filter(optarg);
953 break;
954 default:
955 usage();
956 break;
957 }
958 }
959 argc -= optind;
960 argv += optind;
962 if (argc < 1)
963 usage();
964 device = strdup(argv[0]);
966 if (0 == stat(device, &sb))
967 readfile_state = 1;
968 if (readfile_state) {
969 pcap_obj = pcap_open_offline(device, errbuf);
970 } else {
971 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
972 }
973 if (NULL == pcap_obj) {
974 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
975 exit(1);
976 }
978 if (0 == isatty(1)) {
979 if (0 == readfile_state) {
980 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
981 exit(1);
982 }
983 interactive = 0;
984 print_func = printf;
985 }
987 memset(&fp, '\0', sizeof(fp));
988 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
989 if (x < 0) {
990 fprintf(stderr, "pcap_compile failed\n");
991 exit(1);
992 }
993 x = pcap_setfilter(pcap_obj, &fp);
994 if (x < 0) {
995 fprintf(stderr, "pcap_setfilter failed\n");
996 exit(1);
997 }
999 /*
1000 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
1001 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
1002 */
1003 x = pcap_setnonblock(pcap_obj, 1, errbuf);
1004 if (x < 0) {
1005 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
1006 exit(1);
1007 }
1009 switch (pcap_datalink(pcap_obj)) {
1010 case DLT_EN10MB:
1011 handle_datalink = handle_ether;
1012 break;
1013 #if HAVE_NET_IF_PPP_H
1014 case DLT_PPP:
1015 handle_datalink = handle_ppp;
1016 break;
1017 #endif
1018 #ifdef DLT_LOOP
1019 case DLT_LOOP:
1020 handle_datalink = handle_loop;
1021 break;
1022 #endif
1023 #ifdef DLT_RAW
1024 case DLT_RAW:
1025 handle_datalink = handle_raw;
1026 break;
1027 #endif
1028 case DLT_NULL:
1029 handle_datalink = handle_null;
1030 break;
1031 default:
1032 fprintf(stderr, "unsupported data link type %d\n",
1033 pcap_datalink(pcap_obj));
1034 return 1;
1035 break;
1036 }
1037 if (interactive) {
1038 init_curses();
1039 while (0 == Quit) {
1040 if (readfile_state < 2) {
1041 /*
1042 * On some OSes select() might return 0 even when
1043 * there are packets to process. Thus, we always
1044 * ignore its return value and just call pcap_dispatch()
1045 * anyway.
1046 */
1047 if (0 == readfile_state) /* interactive */
1048 pcap_select(pcap_obj, 1, 0);
1049 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1050 }
1051 if (0 == x && 1 == readfile_state) {
1052 /* block on keyboard until user quits */
1053 readfile_state++;
1054 nodelay(w, 0);
1055 }
1056 keyboard();
1057 cron_pre();
1058 report();
1059 cron_post();
1060 }
1061 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1062 } else {
1063 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1064 (void) 0;
1065 cron_pre();
1066 Sources_report(); print_func("\n");
1067 Destinatioreport(); print_func("\n");
1068 Qtypes_report(); print_func("\n");
1069 Opcodes_report(); print_func("\n");
1070 Tld_report(); print_func("\n");
1071 Sld_report(); print_func("\n");
1072 Nld_report(); print_func("\n");
1073 SldBySource_report();
1074 }
1076 pcap_close(pcap_obj);
1077 return 0;
1078 } /* static int main(int argc, char *argv[]) */
1079 #endif
1080 /*
1081 * vim:shiftwidth=4:tabstop=8:softtabstop=4
1082 */