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"
40 #include "plugin.h"
41 #include "common.h"
43 #if HAVE_NET_IF_ARP_H
44 # include <net/if_arp.h>
45 #endif
46 #if HAVE_NET_IF_H
47 # include <net/if.h>
48 #endif
49 #if HAVE_NET_PPP_DEFS_H
50 # include <net/ppp_defs.h>
51 #endif
52 #if HAVE_NET_IF_PPP_H
53 # include <net/if_ppp.h>
54 #endif
56 #if HAVE_NETINET_IN_SYSTM_H
57 # include <netinet/in_systm.h>
58 #endif
59 #if HAVE_NETINET_IN_H
60 # include <netinet/in.h>
61 #endif
62 #if HAVE_NETINET_IP6_H
63 # include <netinet/ip6.h>
64 #endif
65 #if HAVE_NETINET_IF_ETHER_H
66 # include <netinet/if_ether.h>
67 #endif
68 #if HAVE_NETINET_IP_H
69 # include <netinet/ip.h>
70 #endif
71 #ifdef HAVE_NETINET_IP_VAR_H
72 # include <netinet/ip_var.h>
73 #endif
74 #if HAVE_NETINET_UDP_H
75 # include <netinet/udp.h>
76 #endif
78 #if HAVE_ARPA_INET_H
79 # include <arpa/inet.h>
80 #endif
81 #if HAVE_ARPA_NAMESER_H
82 # include <arpa/nameser.h>
83 #endif
84 #if HAVE_ARPA_NAMESER_COMPAT_H
85 # include <arpa/nameser_compat.h>
86 #endif
88 #if HAVE_NETDB_H
89 # include <netdb.h>
90 #endif
92 #if HAVE_PCAP_H
93 # include <pcap.h>
94 #endif
96 #define PCAP_SNAPLEN 1460
97 #ifndef ETHER_HDR_LEN
98 #define ETHER_ADDR_LEN 6
99 #define ETHER_TYPE_LEN 2
100 #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
101 #endif
102 #ifndef ETHERTYPE_8021Q
103 # define ETHERTYPE_8021Q 0x8100
104 #endif
105 #ifndef ETHERTYPE_IPV6
106 # define ETHERTYPE_IPV6 0x86DD
107 #endif
109 #ifndef PPP_ADDRESS_VAL
110 # define PPP_ADDRESS_VAL 0xff /* The address byte value */
111 #endif
112 #ifndef PPP_CONTROL_VAL
113 # define PPP_CONTROL_VAL 0x03 /* The control byte value */
114 #endif
116 #if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
117 # define UDP_DEST uh_dport
118 # define UDP_SRC uh_sport
119 #elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
120 # define UDP_DEST dest
121 # define UDP_SRC source
122 #else
123 # error "`struct udphdr' is unusable."
124 #endif
126 #if HAVE_NETINET_IP6_H && HAVE_STRUCT_IP6_EXT
127 # define HAVE_IPV6 1
128 #endif
130 #include "utils_dns.h"
132 /*
133 * Type definitions
134 */
135 struct ip_list_s
136 {
137 struct in6_addr addr;
138 void *data;
139 struct ip_list_s *next;
140 };
141 typedef struct ip_list_s ip_list_t;
143 typedef int (printer)(const char *, ...);
145 /*
146 * flags/features for non-interactive mode
147 */
149 #ifndef T_A6
150 #define T_A6 38
151 #endif
152 #ifndef T_SRV
153 #define T_SRV 33
154 #endif
156 /*
157 * Global variables
158 */
160 #if HAVE_PCAP_H
161 static pcap_t *pcap_obj = NULL;
162 #endif
164 static ip_list_t *IgnoreList = NULL;
166 #if HAVE_PCAP_H
167 static void (*Callback) (const rfc1035_header_t *) = NULL;
169 static int query_count_intvl = 0;
170 static int query_count_total = 0;
171 # ifdef __OpenBSD__
172 static struct bpf_timeval last_ts;
173 # else
174 static struct timeval last_ts;
175 # endif /* __OpenBSD__ */
176 #endif /* HAVE_PCAP_H */
178 static int cmp_in6_addr (const struct in6_addr *a,
179 const struct in6_addr *b)
180 {
181 int i;
183 assert (sizeof (struct in6_addr) == 16);
185 for (i = 0; i < 16; i++)
186 if (a->s6_addr[i] != b->s6_addr[i])
187 break;
189 if (i >= 16)
190 return (0);
192 return (a->s6_addr[i] > b->s6_addr[i] ? 1 : -1);
193 } /* int cmp_addrinfo */
195 static inline int ignore_list_match (const struct in6_addr *addr)
196 {
197 ip_list_t *ptr;
199 for (ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
200 if (cmp_in6_addr (addr, &ptr->addr) == 0)
201 return (1);
202 return (0);
203 } /* int ignore_list_match */
205 static void ignore_list_add (const struct in6_addr *addr)
206 {
207 ip_list_t *new;
209 if (ignore_list_match (addr) != 0)
210 return;
212 new = malloc (sizeof (*new));
213 if (new == NULL)
214 {
215 perror ("malloc");
216 return;
217 }
219 memcpy (&new->addr, addr, sizeof (struct in6_addr));
220 new->next = IgnoreList;
222 IgnoreList = new;
223 } /* void ignore_list_add */
225 void ignore_list_add_name (const char *name)
226 {
227 struct addrinfo *ai_list;
228 struct addrinfo *ai_ptr;
229 struct in6_addr addr;
230 int status;
232 status = getaddrinfo (name, NULL, NULL, &ai_list);
233 if (status != 0)
234 return;
236 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
237 {
238 if (ai_ptr->ai_family == AF_INET)
239 {
240 memset (&addr, '\0', sizeof (addr));
241 addr.s6_addr[10] = 0xFF;
242 addr.s6_addr[11] = 0xFF;
243 memcpy (addr.s6_addr + 12, &((struct sockaddr_in *) ai_ptr->ai_addr)->sin_addr, 4);
245 ignore_list_add (&addr);
246 }
247 else
248 {
249 ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
250 }
251 } /* for */
253 freeaddrinfo (ai_list);
254 }
256 #if HAVE_PCAP_H
257 static void in6_addr_from_buffer (struct in6_addr *ia,
258 const void *buf, size_t buf_len,
259 int family)
260 {
261 memset (ia, 0, sizeof (struct in6_addr));
262 if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
263 {
264 ia->s6_addr[10] = 0xFF;
265 ia->s6_addr[11] = 0xFF;
266 memcpy (ia->s6_addr + 12, buf, buf_len);
267 }
268 else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
269 {
270 memcpy (ia, buf, buf_len);
271 }
272 } /* void in6_addr_from_buffer */
274 void dnstop_set_pcap_obj (pcap_t *po)
275 {
276 pcap_obj = po;
277 }
279 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
280 {
281 Callback = cb;
282 }
284 #define RFC1035_MAXLABELSZ 63
285 static int
286 rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns)
287 {
288 off_t no = 0;
289 unsigned char c;
290 size_t len;
291 static int loop_detect = 0;
292 if (loop_detect > 2)
293 return 4; /* compression loop */
294 if (ns == 0)
295 return 4; /* probably compression loop */
296 do {
297 if ((*off) >= ((off_t) sz))
298 break;
299 c = *(buf + (*off));
300 if (c > 191) {
301 /* blasted compression */
302 int rc;
303 unsigned short s;
304 off_t ptr;
305 memcpy(&s, buf + (*off), sizeof(s));
306 s = ntohs(s);
307 (*off) += sizeof(s);
308 /* Sanity check */
309 if ((*off) >= ((off_t) sz))
310 return 1; /* message too short */
311 ptr = s & 0x3FFF;
312 /* Make sure the pointer is inside this message */
313 if (ptr >= ((off_t) sz))
314 return 2; /* bad compression ptr */
315 if (ptr < DNS_MSG_HDR_SZ)
316 return 2; /* bad compression ptr */
317 loop_detect++;
318 rc = rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
319 loop_detect--;
320 return rc;
321 } else if (c > RFC1035_MAXLABELSZ) {
322 /*
323 * "(The 10 and 01 combinations are reserved for future use.)"
324 */
325 return 3; /* reserved label/compression flags */
326 } else {
327 (*off)++;
328 len = (size_t) c;
329 if (len == 0)
330 break;
331 if (len > (ns - 1))
332 len = ns - 1;
333 if ((*off) + len > sz)
334 return 4; /* message is too short */
335 if (no + len + 1 > ns)
336 return 5; /* qname would overflow name buffer */
337 memcpy(name + no, buf + (*off), len);
338 (*off) += len;
339 no += len;
340 *(name + (no++)) = '.';
341 }
342 } while (c > 0);
343 if (no > 0)
344 *(name + no - 1) = '\0';
345 /* make sure we didn't allow someone to overflow the name buffer */
346 assert(no <= ((off_t) ns));
347 return 0;
348 }
350 static int
351 handle_dns(const char *buf, int len)
352 {
353 rfc1035_header_t qh;
354 uint16_t us;
355 off_t offset;
356 char *t;
357 int status;
359 /* The DNS header is 12 bytes long */
360 if (len < DNS_MSG_HDR_SZ)
361 return 0;
363 memcpy(&us, buf + 0, 2);
364 qh.id = ntohs(us);
366 memcpy(&us, buf + 2, 2);
367 us = ntohs(us);
368 qh.qr = (us >> 15) & 0x01;
369 qh.opcode = (us >> 11) & 0x0F;
370 qh.aa = (us >> 10) & 0x01;
371 qh.tc = (us >> 9) & 0x01;
372 qh.rd = (us >> 8) & 0x01;
373 qh.ra = (us >> 7) & 0x01;
374 qh.z = (us >> 6) & 0x01;
375 qh.ad = (us >> 5) & 0x01;
376 qh.cd = (us >> 4) & 0x01;
377 qh.rcode = us & 0x0F;
379 memcpy(&us, buf + 4, 2);
380 qh.qdcount = ntohs(us);
382 memcpy(&us, buf + 6, 2);
383 qh.ancount = ntohs(us);
385 memcpy(&us, buf + 8, 2);
386 qh.nscount = ntohs(us);
388 memcpy(&us, buf + 10, 2);
389 qh.arcount = ntohs(us);
391 offset = DNS_MSG_HDR_SZ;
392 memset(qh.qname, '\0', MAX_QNAME_SZ);
393 status = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
394 if (status != 0)
395 {
396 INFO ("utils_dns: handle_dns: rfc1035NameUnpack failed "
397 "with status %i.", status);
398 return 0;
399 }
400 if ('\0' == qh.qname[0])
401 sstrncpy (qh.qname, ".", sizeof (qh.qname));
402 while ((t = strchr(qh.qname, '\n')))
403 *t = ' ';
404 while ((t = strchr(qh.qname, '\r')))
405 *t = ' ';
406 for (t = qh.qname; *t; t++)
407 *t = tolower((int) *t);
409 memcpy(&us, buf + offset, 2);
410 qh.qtype = ntohs(us);
411 memcpy(&us, buf + offset + 2, 2);
412 qh.qclass = ntohs(us);
414 qh.length = (uint16_t) len;
416 if (Callback != NULL)
417 Callback (&qh);
419 return 1;
420 }
422 static int
423 handle_udp(const struct udphdr *udp, int len)
424 {
425 char buf[PCAP_SNAPLEN];
426 if ((ntohs (udp->UDP_DEST) != 53)
427 && (ntohs (udp->UDP_SRC) != 53))
428 return 0;
429 memcpy(buf, udp + 1, len - sizeof(*udp));
430 if (0 == handle_dns(buf, len - sizeof(*udp)))
431 return 0;
432 return 1;
433 }
435 #if HAVE_IPV6
436 static int
437 handle_ipv6 (struct ip6_hdr *ipv6, int len)
438 {
439 char buf[PCAP_SNAPLEN];
440 unsigned int offset;
441 int nexthdr;
443 struct in6_addr c_src_addr;
444 uint16_t payload_len;
446 if (0 > len)
447 return (0);
449 offset = sizeof (struct ip6_hdr);
450 nexthdr = ipv6->ip6_nxt;
451 c_src_addr = ipv6->ip6_src;
452 payload_len = ntohs (ipv6->ip6_plen);
454 if (ignore_list_match (&c_src_addr))
455 return (0);
457 /* Parse extension headers. This only handles the standard headers, as
458 * defined in RFC 2460, correctly. Fragments are discarded. */
459 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
460 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
461 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
462 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
463 || (IPPROTO_AH == nexthdr) /* destination options. */
464 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
465 {
466 struct ip6_ext ext_hdr;
467 uint16_t ext_hdr_len;
469 /* Catch broken packets */
470 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
471 return (0);
473 /* Cannot handle fragments. */
474 if (IPPROTO_FRAGMENT == nexthdr)
475 return (0);
477 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
478 nexthdr = ext_hdr.ip6e_nxt;
479 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
481 /* This header is longer than the packets payload.. WTF? */
482 if (ext_hdr_len > payload_len)
483 return (0);
485 offset += ext_hdr_len;
486 payload_len -= ext_hdr_len;
487 } /* while */
489 /* Catch broken and empty packets */
490 if (((offset + payload_len) > (unsigned int)len)
491 || (payload_len == 0)
492 || (payload_len > PCAP_SNAPLEN))
493 return (0);
495 if (IPPROTO_UDP != nexthdr)
496 return (0);
498 memcpy (buf, (char *) ipv6 + offset, payload_len);
499 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
500 return (0);
502 return (1); /* Success */
503 } /* int handle_ipv6 */
504 /* #endif HAVE_IPV6 */
506 #else /* if !HAVE_IPV6 */
507 static int
508 handle_ipv6 (__attribute__((unused)) void *pkg,
509 __attribute__((unused)) int len)
510 {
511 return (0);
512 }
513 #endif /* !HAVE_IPV6 */
515 static int
516 handle_ip(const struct ip *ip, int len)
517 {
518 char buf[PCAP_SNAPLEN];
519 int offset = ip->ip_hl << 2;
520 struct in6_addr c_src_addr;
521 struct in6_addr c_dst_addr;
523 if (ip->ip_v == 6)
524 return (handle_ipv6 ((void *) ip, len));
526 in6_addr_from_buffer (&c_src_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
527 in6_addr_from_buffer (&c_dst_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
528 if (ignore_list_match (&c_src_addr))
529 return (0);
530 if (IPPROTO_UDP != ip->ip_p)
531 return 0;
532 memcpy(buf, (void *) ip + offset, len - offset);
533 if (0 == handle_udp((struct udphdr *) buf, len - offset))
534 return 0;
535 return 1;
536 }
538 #if HAVE_NET_IF_PPP_H
539 static int
540 handle_ppp(const u_char * pkt, int len)
541 {
542 char buf[PCAP_SNAPLEN];
543 unsigned short us;
544 unsigned short proto;
545 if (len < 2)
546 return 0;
547 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
548 pkt += 2; /* ACFC not used */
549 len -= 2;
550 }
551 if (len < 2)
552 return 0;
553 if (*pkt % 2) {
554 proto = *pkt; /* PFC is used */
555 pkt++;
556 len--;
557 } else {
558 memcpy(&us, pkt, sizeof(us));
559 proto = ntohs(us);
560 pkt += 2;
561 len -= 2;
562 }
563 if (ETHERTYPE_IP != proto && PPP_IP != proto)
564 return 0;
565 memcpy(buf, pkt, len);
566 return handle_ip((struct ip *) buf, len);
567 }
568 #endif /* HAVE_NET_IF_PPP_H */
570 static int
571 handle_null(const u_char * pkt, int len)
572 {
573 unsigned int family;
574 memcpy(&family, pkt, sizeof(family));
575 if (AF_INET != family)
576 return 0;
577 return handle_ip((struct ip *) (pkt + 4), len - 4);
578 }
580 #ifdef DLT_LOOP
581 static int
582 handle_loop(const u_char * pkt, int len)
583 {
584 unsigned int family;
585 memcpy(&family, pkt, sizeof(family));
586 if (AF_INET != ntohl(family))
587 return 0;
588 return handle_ip((struct ip *) (pkt + 4), len - 4);
589 }
591 #endif
593 #ifdef DLT_RAW
594 static int
595 handle_raw(const u_char * pkt, int len)
596 {
597 return handle_ip((struct ip *) pkt, len);
598 }
600 #endif
602 static int
603 handle_ether(const u_char * pkt, int len)
604 {
605 char buf[PCAP_SNAPLEN];
606 struct ether_header *e = (void *) pkt;
607 unsigned short etype = ntohs(e->ether_type);
608 if (len < ETHER_HDR_LEN)
609 return 0;
610 pkt += ETHER_HDR_LEN;
611 len -= ETHER_HDR_LEN;
612 if (ETHERTYPE_8021Q == etype) {
613 etype = ntohs(*(unsigned short *) (pkt + 2));
614 pkt += 4;
615 len -= 4;
616 }
617 if ((ETHERTYPE_IP != etype)
618 && (ETHERTYPE_IPV6 != etype))
619 return 0;
620 memcpy(buf, pkt, len);
621 if (ETHERTYPE_IPV6 == etype)
622 return (handle_ipv6 ((void *) buf, len));
623 else
624 return handle_ip((struct ip *) buf, len);
625 }
627 #ifdef DLT_LINUX_SLL
628 static int
629 handle_linux_sll (const u_char *pkt, int len)
630 {
631 struct sll_header
632 {
633 uint16_t pkt_type;
634 uint16_t dev_type;
635 uint16_t addr_len;
636 uint8_t addr[8];
637 uint16_t proto_type;
638 } *hdr;
639 uint16_t etype;
641 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
642 return (0);
644 hdr = (struct sll_header *) pkt;
645 pkt = (u_char *) (hdr + 1);
646 len -= sizeof (struct sll_header);
648 etype = ntohs (hdr->proto_type);
650 if ((ETHERTYPE_IP != etype)
651 && (ETHERTYPE_IPV6 != etype))
652 return 0;
654 if (ETHERTYPE_IPV6 == etype)
655 return (handle_ipv6 ((void *) pkt, len));
656 else
657 return handle_ip((struct ip *) pkt, len);
658 }
659 #endif /* DLT_LINUX_SLL */
661 /* public function */
662 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
663 {
664 int status;
666 if (hdr->caplen < ETHER_HDR_LEN)
667 return;
669 switch (pcap_datalink (pcap_obj))
670 {
671 case DLT_EN10MB:
672 status = handle_ether (pkt, hdr->caplen);
673 break;
674 #if HAVE_NET_IF_PPP_H
675 case DLT_PPP:
676 status = handle_ppp (pkt, hdr->caplen);
677 break;
678 #endif
679 #ifdef DLT_LOOP
680 case DLT_LOOP:
681 status = handle_loop (pkt, hdr->caplen);
682 break;
683 #endif
684 #ifdef DLT_RAW
685 case DLT_RAW:
686 status = handle_raw (pkt, hdr->caplen);
687 break;
688 #endif
689 #ifdef DLT_LINUX_SLL
690 case DLT_LINUX_SLL:
691 status = handle_linux_sll (pkt, hdr->caplen);
692 break;
693 #endif
694 case DLT_NULL:
695 status = handle_null (pkt, hdr->caplen);
696 break;
698 default:
699 ERROR ("handle_pcap: unsupported data link type %d",
700 pcap_datalink(pcap_obj));
701 status = 0;
702 break;
703 } /* switch (pcap_datalink(pcap_obj)) */
705 if (0 == status)
706 return;
708 query_count_intvl++;
709 query_count_total++;
710 last_ts = hdr->ts;
711 }
712 #endif /* HAVE_PCAP_H */
714 const char *qtype_str(int t)
715 {
716 static char buf[32];
717 switch (t) {
718 #if (defined (__NAMESER)) && (__NAMESER >= 19991001)
719 case ns_t_a: return ("A");
720 case ns_t_ns: return ("NS");
721 case ns_t_md: return ("MD");
722 case ns_t_mf: return ("MF");
723 case ns_t_cname: return ("CNAME");
724 case ns_t_soa: return ("SOA");
725 case ns_t_mb: return ("MB");
726 case ns_t_mg: return ("MG");
727 case ns_t_mr: return ("MR");
728 case ns_t_null: return ("NULL");
729 case ns_t_wks: return ("WKS");
730 case ns_t_ptr: return ("PTR");
731 case ns_t_hinfo: return ("HINFO");
732 case ns_t_minfo: return ("MINFO");
733 case ns_t_mx: return ("MX");
734 case ns_t_txt: return ("TXT");
735 case ns_t_rp: return ("RP");
736 case ns_t_afsdb: return ("AFSDB");
737 case ns_t_x25: return ("X25");
738 case ns_t_isdn: return ("ISDN");
739 case ns_t_rt: return ("RT");
740 case ns_t_nsap: return ("NSAP");
741 case ns_t_nsap_ptr: return ("NSAP-PTR");
742 case ns_t_sig: return ("SIG");
743 case ns_t_key: return ("KEY");
744 case ns_t_px: return ("PX");
745 case ns_t_gpos: return ("GPOS");
746 case ns_t_aaaa: return ("AAAA");
747 case ns_t_loc: return ("LOC");
748 case ns_t_nxt: return ("NXT");
749 case ns_t_eid: return ("EID");
750 case ns_t_nimloc: return ("NIMLOC");
751 case ns_t_srv: return ("SRV");
752 case ns_t_atma: return ("ATMA");
753 case ns_t_naptr: return ("NAPTR");
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_opt: return ("OPT");
760 # if __NAMESER >= 19991006
761 case ns_t_tsig: return ("TSIG");
762 # endif
763 case ns_t_ixfr: return ("IXFR");
764 case ns_t_axfr: return ("AXFR");
765 case ns_t_mailb: return ("MAILB");
766 case ns_t_maila: return ("MAILA");
767 case ns_t_any: return ("ANY");
768 case ns_t_zxfr: return ("ZXFR");
769 /* #endif __NAMESER >= 19991006 */
770 #elif (defined (__BIND)) && (__BIND >= 19950621)
771 case T_A: return ("A"); /* 1 ... */
772 case T_NS: return ("NS");
773 case T_MD: return ("MD");
774 case T_MF: return ("MF");
775 case T_CNAME: return ("CNAME");
776 case T_SOA: return ("SOA");
777 case T_MB: return ("MB");
778 case T_MG: return ("MG");
779 case T_MR: return ("MR");
780 case T_NULL: return ("NULL");
781 case T_WKS: return ("WKS");
782 case T_PTR: return ("PTR");
783 case T_HINFO: return ("HINFO");
784 case T_MINFO: return ("MINFO");
785 case T_MX: return ("MX");
786 case T_TXT: return ("TXT");
787 case T_RP: return ("RP");
788 case T_AFSDB: return ("AFSDB");
789 case T_X25: return ("X25");
790 case T_ISDN: return ("ISDN");
791 case T_RT: return ("RT");
792 case T_NSAP: return ("NSAP");
793 case T_NSAP_PTR: return ("NSAP_PTR");
794 case T_SIG: return ("SIG");
795 case T_KEY: return ("KEY");
796 case T_PX: return ("PX");
797 case T_GPOS: return ("GPOS");
798 case T_AAAA: return ("AAAA");
799 case T_LOC: return ("LOC");
800 case T_NXT: return ("NXT");
801 case T_EID: return ("EID");
802 case T_NIMLOC: return ("NIMLOC");
803 case T_SRV: return ("SRV");
804 case T_ATMA: return ("ATMA");
805 case T_NAPTR: return ("NAPTR"); /* ... 35 */
806 #if (__BIND >= 19960801)
807 case T_KX: return ("KX"); /* 36 ... */
808 case T_CERT: return ("CERT");
809 case T_A6: return ("A6");
810 case T_DNAME: return ("DNAME");
811 case T_SINK: return ("SINK");
812 case T_OPT: return ("OPT");
813 case T_APL: return ("APL");
814 case T_DS: return ("DS");
815 case T_SSHFP: return ("SSHFP");
816 case T_RRSIG: return ("RRSIG");
817 case T_NSEC: return ("NSEC");
818 case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
819 case T_TKEY: return ("TKEY"); /* 249 */
820 #endif /* __BIND >= 19960801 */
821 case T_TSIG: return ("TSIG"); /* 250 ... */
822 case T_IXFR: return ("IXFR");
823 case T_AXFR: return ("AXFR");
824 case T_MAILB: return ("MAILB");
825 case T_MAILA: return ("MAILA");
826 case T_ANY: return ("ANY"); /* ... 255 */
827 #endif /* __BIND >= 19950621 */
828 default:
829 ssnprintf (buf, sizeof (buf), "#%i", t);
830 return (buf);
831 } /* switch (t) */
832 }
834 const char *opcode_str (int o)
835 {
836 static char buf[30];
837 switch (o) {
838 case 0:
839 return "Query";
840 case 1:
841 return "Iquery";
842 case 2:
843 return "Status";
844 case 4:
845 return "Notify";
846 case 5:
847 return "Update";
848 default:
849 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
850 return buf;
851 }
852 }
854 const char *rcode_str (int rcode)
855 {
856 static char buf[32];
857 switch (rcode)
858 {
859 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
860 case ns_r_noerror: return ("NOERROR");
861 case ns_r_formerr: return ("FORMERR");
862 case ns_r_servfail: return ("SERVFAIL");
863 case ns_r_nxdomain: return ("NXDOMAIN");
864 case ns_r_notimpl: return ("NOTIMPL");
865 case ns_r_refused: return ("REFUSED");
866 case ns_r_yxdomain: return ("YXDOMAIN");
867 case ns_r_yxrrset: return ("YXRRSET");
868 case ns_r_nxrrset: return ("NXRRSET");
869 case ns_r_notauth: return ("NOTAUTH");
870 case ns_r_notzone: return ("NOTZONE");
871 case ns_r_max: return ("MAX");
872 case ns_r_badsig: return ("BADSIG");
873 case ns_r_badkey: return ("BADKEY");
874 case ns_r_badtime: return ("BADTIME");
875 /* #endif __NAMESER >= 19991006 */
876 #elif (defined (__BIND)) && (__BIND >= 19950621)
877 case NOERROR: return ("NOERROR");
878 case FORMERR: return ("FORMERR");
879 case SERVFAIL: return ("SERVFAIL");
880 case NXDOMAIN: return ("NXDOMAIN");
881 case NOTIMP: return ("NOTIMP");
882 case REFUSED: return ("REFUSED");
883 #if defined (YXDOMAIN) && defined (NXRRSET)
884 case YXDOMAIN: return ("YXDOMAIN");
885 case YXRRSET: return ("YXRRSET");
886 case NXRRSET: return ("NXRRSET");
887 case NOTAUTH: return ("NOTAUTH");
888 case NOTZONE: return ("NOTZONE");
889 #endif /* RFC2136 rcodes */
890 #endif /* __BIND >= 19950621 */
891 default:
892 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
893 return (buf);
894 }
895 } /* const char *rcode_str (int rcode) */
897 #if 0
898 static int
899 main(int argc, char *argv[])
900 {
901 char errbuf[PCAP_ERRBUF_SIZE];
902 int x;
903 struct stat sb;
904 int readfile_state = 0;
905 struct bpf_program fp;
907 port53 = htons(53);
908 SubReport = Sources_report;
909 ignore_addr.s_addr = 0;
910 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
911 srandom(time(NULL));
912 ResetCounters();
914 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
915 switch (x) {
916 case 'a':
917 anon_flag = 1;
918 break;
919 case 's':
920 sld_flag = 1;
921 break;
922 case 't':
923 nld_flag = 1;
924 break;
925 case 'p':
926 promisc_flag = 0;
927 break;
928 case 'b':
929 bpf_program_str = strdup(optarg);
930 break;
931 case 'i':
932 ignore_addr.s_addr = inet_addr(optarg);
933 break;
934 case 'f':
935 set_filter(optarg);
936 break;
937 default:
938 usage();
939 break;
940 }
941 }
942 argc -= optind;
943 argv += optind;
945 if (argc < 1)
946 usage();
947 device = strdup(argv[0]);
949 if (0 == stat(device, &sb))
950 readfile_state = 1;
951 if (readfile_state) {
952 pcap_obj = pcap_open_offline(device, errbuf);
953 } else {
954 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
955 }
956 if (NULL == pcap_obj) {
957 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
958 exit(1);
959 }
961 if (0 == isatty(1)) {
962 if (0 == readfile_state) {
963 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
964 exit(1);
965 }
966 interactive = 0;
967 print_func = printf;
968 }
970 memset(&fp, '\0', sizeof(fp));
971 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
972 if (x < 0) {
973 fprintf(stderr, "pcap_compile failed\n");
974 exit(1);
975 }
976 x = pcap_setfilter(pcap_obj, &fp);
977 if (x < 0) {
978 fprintf(stderr, "pcap_setfilter failed\n");
979 exit(1);
980 }
982 /*
983 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
984 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
985 */
986 x = pcap_setnonblock(pcap_obj, 1, errbuf);
987 if (x < 0) {
988 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
989 exit(1);
990 }
992 switch (pcap_datalink(pcap_obj)) {
993 case DLT_EN10MB:
994 handle_datalink = handle_ether;
995 break;
996 #if HAVE_NET_IF_PPP_H
997 case DLT_PPP:
998 handle_datalink = handle_ppp;
999 break;
1000 #endif
1001 #ifdef DLT_LOOP
1002 case DLT_LOOP:
1003 handle_datalink = handle_loop;
1004 break;
1005 #endif
1006 #ifdef DLT_RAW
1007 case DLT_RAW:
1008 handle_datalink = handle_raw;
1009 break;
1010 #endif
1011 case DLT_NULL:
1012 handle_datalink = handle_null;
1013 break;
1014 default:
1015 fprintf(stderr, "unsupported data link type %d\n",
1016 pcap_datalink(pcap_obj));
1017 return 1;
1018 break;
1019 }
1020 if (interactive) {
1021 init_curses();
1022 while (0 == Quit) {
1023 if (readfile_state < 2) {
1024 /*
1025 * On some OSes select() might return 0 even when
1026 * there are packets to process. Thus, we always
1027 * ignore its return value and just call pcap_dispatch()
1028 * anyway.
1029 */
1030 if (0 == readfile_state) /* interactive */
1031 pcap_select(pcap_obj, 1, 0);
1032 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1033 }
1034 if (0 == x && 1 == readfile_state) {
1035 /* block on keyboard until user quits */
1036 readfile_state++;
1037 nodelay(w, 0);
1038 }
1039 keyboard();
1040 cron_pre();
1041 report();
1042 cron_post();
1043 }
1044 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1045 } else {
1046 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1047 (void) 0;
1048 cron_pre();
1049 Sources_report(); print_func("\n");
1050 Destinatioreport(); print_func("\n");
1051 Qtypes_report(); print_func("\n");
1052 Opcodes_report(); print_func("\n");
1053 Tld_report(); print_func("\n");
1054 Sld_report(); print_func("\n");
1055 Nld_report(); print_func("\n");
1056 SldBySource_report();
1057 }
1059 pcap_close(pcap_obj);
1060 return 0;
1061 } /* static int main(int argc, char *argv[]) */
1062 #endif
1063 /*
1064 * vim:shiftwidth=4:tabstop=8:softtabstop=4
1065 */