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 static int
445 handle_ipv6 (struct ip6_hdr *ipv6, int len)
446 {
447 char buf[PCAP_SNAPLEN];
448 unsigned int offset;
449 int nexthdr;
451 struct in6_addr s_addr;
452 struct in6_addr d_addr;
453 uint16_t payload_len;
455 if (0 > len)
456 return (0);
458 offset = sizeof (struct ip6_hdr);
459 nexthdr = ipv6->ip6_nxt;
460 s_addr = ipv6->ip6_src;
461 d_addr = ipv6->ip6_dst;
462 payload_len = ntohs (ipv6->ip6_plen);
464 if (ignore_list_match (&s_addr))
465 return (0);
467 /* Parse extension headers. This only handles the standard headers, as
468 * defined in RFC 2460, correctly. Fragments are discarded. */
469 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
470 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
471 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
472 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
473 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
474 || (IPPROTO_AH == nexthdr) /* destination options. */
475 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
476 {
477 struct ip6_ext ext_hdr;
478 uint16_t ext_hdr_len;
480 /* Catch broken packets */
481 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
482 return (0);
484 /* Cannot handle fragments. */
485 if (IPPROTO_FRAGMENT == nexthdr)
486 return (0);
488 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
489 nexthdr = ext_hdr.ip6e_nxt;
490 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
492 /* This header is longer than the packets payload.. WTF? */
493 if (ext_hdr_len > payload_len)
494 return (0);
496 offset += ext_hdr_len;
497 payload_len -= ext_hdr_len;
498 } /* while */
500 /* Catch broken and empty packets */
501 if (((offset + payload_len) > (unsigned int)len)
502 || (payload_len == 0)
503 || (payload_len > PCAP_SNAPLEN))
504 return (0);
506 if (IPPROTO_UDP != nexthdr)
507 return (0);
509 memcpy (buf, (char *) ipv6 + offset, payload_len);
510 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
511 return (0);
513 return (1); /* Success */
514 } /* int handle_ipv6 */
516 static int
517 handle_ip(const struct ip *ip, int len)
518 {
519 char buf[PCAP_SNAPLEN];
520 int offset = ip->ip_hl << 2;
521 struct in6_addr s_addr;
522 struct in6_addr d_addr;
524 if (ip->ip_v == 6)
525 return (handle_ipv6 ((struct ip6_hdr *) ip, len));
527 in6_addr_from_buffer (&s_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
528 in6_addr_from_buffer (&d_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
529 if (ignore_list_match (&s_addr))
530 return (0);
531 if (IPPROTO_UDP != ip->ip_p)
532 return 0;
533 memcpy(buf, (void *) ip + offset, len - offset);
534 if (0 == handle_udp((struct udphdr *) buf, len - offset))
535 return 0;
536 return 1;
537 }
539 #if HAVE_NET_IF_PPP_H
540 static int
541 handle_ppp(const u_char * pkt, int len)
542 {
543 char buf[PCAP_SNAPLEN];
544 unsigned short us;
545 unsigned short proto;
546 if (len < 2)
547 return 0;
548 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
549 pkt += 2; /* ACFC not used */
550 len -= 2;
551 }
552 if (len < 2)
553 return 0;
554 if (*pkt % 2) {
555 proto = *pkt; /* PFC is used */
556 pkt++;
557 len--;
558 } else {
559 memcpy(&us, pkt, sizeof(us));
560 proto = ntohs(us);
561 pkt += 2;
562 len -= 2;
563 }
564 if (ETHERTYPE_IP != proto && PPP_IP != proto)
565 return 0;
566 memcpy(buf, pkt, len);
567 return handle_ip((struct ip *) buf, len);
568 }
569 #endif /* HAVE_NET_IF_PPP_H */
571 static int
572 handle_null(const u_char * pkt, int len)
573 {
574 unsigned int family;
575 memcpy(&family, pkt, sizeof(family));
576 if (AF_INET != family)
577 return 0;
578 return handle_ip((struct ip *) (pkt + 4), len - 4);
579 }
581 #ifdef DLT_LOOP
582 static int
583 handle_loop(const u_char * pkt, int len)
584 {
585 unsigned int family;
586 memcpy(&family, pkt, sizeof(family));
587 if (AF_INET != ntohl(family))
588 return 0;
589 return handle_ip((struct ip *) (pkt + 4), len - 4);
590 }
592 #endif
594 #ifdef DLT_RAW
595 static int
596 handle_raw(const u_char * pkt, int len)
597 {
598 return handle_ip((struct ip *) pkt, len);
599 }
601 #endif
603 static int
604 handle_ether(const u_char * pkt, int len)
605 {
606 char buf[PCAP_SNAPLEN];
607 struct ether_header *e = (void *) pkt;
608 unsigned short etype = ntohs(e->ether_type);
609 if (len < ETHER_HDR_LEN)
610 return 0;
611 pkt += ETHER_HDR_LEN;
612 len -= ETHER_HDR_LEN;
613 if (ETHERTYPE_8021Q == etype) {
614 etype = ntohs(*(unsigned short *) (pkt + 2));
615 pkt += 4;
616 len -= 4;
617 }
618 if ((ETHERTYPE_IP != etype)
619 && (ETHERTYPE_IPV6 != etype))
620 return 0;
621 memcpy(buf, pkt, len);
622 if (ETHERTYPE_IPV6 == etype)
623 return (handle_ipv6 ((struct ip6_hdr *) buf, len));
624 else
625 return handle_ip((struct ip *) buf, len);
626 }
628 #ifdef DLT_LINUX_SLL
629 static int
630 handle_linux_sll (const u_char *pkt, int len)
631 {
632 struct sll_header
633 {
634 uint16_t pkt_type;
635 uint16_t dev_type;
636 uint16_t addr_len;
637 uint8_t addr[8];
638 uint16_t proto_type;
639 } *hdr;
640 uint16_t etype;
642 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
643 return (0);
645 hdr = (struct sll_header *) pkt;
646 pkt = (u_char *) (hdr + 1);
647 len -= sizeof (struct sll_header);
649 etype = ntohs (hdr->proto_type);
651 if ((ETHERTYPE_IP != etype)
652 && (ETHERTYPE_IPV6 != etype))
653 return 0;
655 if (ETHERTYPE_IPV6 == etype)
656 return (handle_ipv6 ((struct ip6_hdr *) pkt, len));
657 else
658 return handle_ip((struct ip *) pkt, len);
659 }
660 #endif /* DLT_LINUX_SLL */
662 /* public function */
663 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
664 {
665 int status;
667 if (hdr->caplen < ETHER_HDR_LEN)
668 return;
670 switch (pcap_datalink (pcap_obj))
671 {
672 case DLT_EN10MB:
673 status = handle_ether (pkt, hdr->caplen);
674 break;
675 #if HAVE_NET_IF_PPP_H
676 case DLT_PPP:
677 status = handle_ppp (pkt, hdr->caplen);
678 break;
679 #endif
680 #ifdef DLT_LOOP
681 case DLT_LOOP:
682 status = handle_loop (pkt, hdr->caplen);
683 break;
684 #endif
685 #ifdef DLT_RAW
686 case DLT_RAW:
687 status = handle_raw (pkt, hdr->caplen);
688 break;
689 #endif
690 #ifdef DLT_LINUX_SLL
691 case DLT_LINUX_SLL:
692 status = handle_linux_sll (pkt, hdr->caplen);
693 break;
694 #endif
695 case DLT_NULL:
696 status = handle_null (pkt, hdr->caplen);
697 break;
699 default:
700 ERROR ("handle_pcap: unsupported data link type %d",
701 pcap_datalink(pcap_obj));
702 status = 0;
703 break;
704 } /* switch (pcap_datalink(pcap_obj)) */
706 if (0 == status)
707 return;
709 query_count_intvl++;
710 query_count_total++;
711 last_ts = hdr->ts;
712 }
713 #endif /* HAVE_PCAP_H */
715 const char *qtype_str(int t)
716 {
717 static char buf[32];
718 switch (t) {
719 #if (defined (__NAMESER)) && (__NAMESER >= 19991001)
720 case ns_t_a: return ("A");
721 case ns_t_ns: return ("NS");
722 case ns_t_md: return ("MD");
723 case ns_t_mf: return ("MF");
724 case ns_t_cname: return ("CNAME");
725 case ns_t_soa: return ("SOA");
726 case ns_t_mb: return ("MB");
727 case ns_t_mg: return ("MG");
728 case ns_t_mr: return ("MR");
729 case ns_t_null: return ("NULL");
730 case ns_t_wks: return ("WKS");
731 case ns_t_ptr: return ("PTR");
732 case ns_t_hinfo: return ("HINFO");
733 case ns_t_minfo: return ("MINFO");
734 case ns_t_mx: return ("MX");
735 case ns_t_txt: return ("TXT");
736 case ns_t_rp: return ("RP");
737 case ns_t_afsdb: return ("AFSDB");
738 case ns_t_x25: return ("X25");
739 case ns_t_isdn: return ("ISDN");
740 case ns_t_rt: return ("RT");
741 case ns_t_nsap: return ("NSAP");
742 case ns_t_nsap_ptr: return ("NSAP-PTR");
743 case ns_t_sig: return ("SIG");
744 case ns_t_key: return ("KEY");
745 case ns_t_px: return ("PX");
746 case ns_t_gpos: return ("GPOS");
747 case ns_t_aaaa: return ("AAAA");
748 case ns_t_loc: return ("LOC");
749 case ns_t_nxt: return ("NXT");
750 case ns_t_eid: return ("EID");
751 case ns_t_nimloc: return ("NIMLOC");
752 case ns_t_srv: return ("SRV");
753 case ns_t_atma: return ("ATMA");
754 case ns_t_naptr: return ("NAPTR");
755 case ns_t_kx: return ("KX");
756 case ns_t_cert: return ("CERT");
757 case ns_t_a6: return ("A6");
758 case ns_t_dname: return ("DNAME");
759 case ns_t_sink: return ("SINK");
760 case ns_t_opt: return ("OPT");
761 # if __NAMESER >= 19991006
762 case ns_t_tsig: return ("TSIG");
763 # endif
764 case ns_t_ixfr: return ("IXFR");
765 case ns_t_axfr: return ("AXFR");
766 case ns_t_mailb: return ("MAILB");
767 case ns_t_maila: return ("MAILA");
768 case ns_t_any: return ("ANY");
769 case ns_t_zxfr: return ("ZXFR");
770 /* #endif __NAMESER >= 19991006 */
771 #elif (defined (__BIND)) && (__BIND >= 19950621)
772 case T_A: return ("A"); /* 1 ... */
773 case T_NS: return ("NS");
774 case T_MD: return ("MD");
775 case T_MF: return ("MF");
776 case T_CNAME: return ("CNAME");
777 case T_SOA: return ("SOA");
778 case T_MB: return ("MB");
779 case T_MG: return ("MG");
780 case T_MR: return ("MR");
781 case T_NULL: return ("NULL");
782 case T_WKS: return ("WKS");
783 case T_PTR: return ("PTR");
784 case T_HINFO: return ("HINFO");
785 case T_MINFO: return ("MINFO");
786 case T_MX: return ("MX");
787 case T_TXT: return ("TXT");
788 case T_RP: return ("RP");
789 case T_AFSDB: return ("AFSDB");
790 case T_X25: return ("X25");
791 case T_ISDN: return ("ISDN");
792 case T_RT: return ("RT");
793 case T_NSAP: return ("NSAP");
794 case T_NSAP_PTR: return ("NSAP_PTR");
795 case T_SIG: return ("SIG");
796 case T_KEY: return ("KEY");
797 case T_PX: return ("PX");
798 case T_GPOS: return ("GPOS");
799 case T_AAAA: return ("AAAA");
800 case T_LOC: return ("LOC");
801 case T_NXT: return ("NXT");
802 case T_EID: return ("EID");
803 case T_NIMLOC: return ("NIMLOC");
804 case T_SRV: return ("SRV");
805 case T_ATMA: return ("ATMA");
806 case T_NAPTR: return ("NAPTR"); /* ... 35 */
807 #if (__BIND >= 19960801)
808 case T_KX: return ("KX"); /* 36 ... */
809 case T_CERT: return ("CERT");
810 case T_A6: return ("A6");
811 case T_DNAME: return ("DNAME");
812 case T_SINK: return ("SINK");
813 case T_OPT: return ("OPT");
814 case T_APL: return ("APL");
815 case T_DS: return ("DS");
816 case T_SSHFP: return ("SSHFP");
817 case T_RRSIG: return ("RRSIG");
818 case T_NSEC: return ("NSEC");
819 case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
820 case T_TKEY: return ("TKEY"); /* 249 */
821 #endif /* __BIND >= 19960801 */
822 case T_TSIG: return ("TSIG"); /* 250 ... */
823 case T_IXFR: return ("IXFR");
824 case T_AXFR: return ("AXFR");
825 case T_MAILB: return ("MAILB");
826 case T_MAILA: return ("MAILA");
827 case T_ANY: return ("ANY"); /* ... 255 */
828 #endif /* __BIND >= 19950621 */
829 default:
830 ssnprintf (buf, sizeof (buf), "#%i", t);
831 return (buf);
832 }; /* switch (t) */
833 /* NOTREACHED */
834 return (NULL);
835 }
837 const char *opcode_str (int o)
838 {
839 static char buf[30];
840 switch (o) {
841 case 0:
842 return "Query";
843 break;
844 case 1:
845 return "Iquery";
846 break;
847 case 2:
848 return "Status";
849 break;
850 case 4:
851 return "Notify";
852 break;
853 case 5:
854 return "Update";
855 break;
856 default:
857 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
858 return buf;
859 }
860 /* NOTREACHED */
861 }
863 const char *rcode_str (int rcode)
864 {
865 static char buf[32];
866 switch (rcode)
867 {
868 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
869 case ns_r_noerror: return ("NOERROR");
870 case ns_r_formerr: return ("FORMERR");
871 case ns_r_servfail: return ("SERVFAIL");
872 case ns_r_nxdomain: return ("NXDOMAIN");
873 case ns_r_notimpl: return ("NOTIMPL");
874 case ns_r_refused: return ("REFUSED");
875 case ns_r_yxdomain: return ("YXDOMAIN");
876 case ns_r_yxrrset: return ("YXRRSET");
877 case ns_r_nxrrset: return ("NXRRSET");
878 case ns_r_notauth: return ("NOTAUTH");
879 case ns_r_notzone: return ("NOTZONE");
880 case ns_r_max: return ("MAX");
881 case ns_r_badsig: return ("BADSIG");
882 case ns_r_badkey: return ("BADKEY");
883 case ns_r_badtime: return ("BADTIME");
884 /* #endif __NAMESER >= 19991006 */
885 #elif (defined (__BIND)) && (__BIND >= 19950621)
886 case NOERROR: return ("NOERROR");
887 case FORMERR: return ("FORMERR");
888 case SERVFAIL: return ("SERVFAIL");
889 case NXDOMAIN: return ("NXDOMAIN");
890 case NOTIMP: return ("NOTIMP");
891 case REFUSED: return ("REFUSED");
892 #if defined (YXDOMAIN) && defined (NXRRSET)
893 case YXDOMAIN: return ("YXDOMAIN");
894 case YXRRSET: return ("YXRRSET");
895 case NXRRSET: return ("NXRRSET");
896 case NOTAUTH: return ("NOTAUTH");
897 case NOTZONE: return ("NOTZONE");
898 #endif /* RFC2136 rcodes */
899 #endif /* __BIND >= 19950621 */
900 default:
901 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
902 return (buf);
903 }
904 /* Never reached */
905 return (NULL);
906 } /* const char *rcode_str (int rcode) */
908 #if 0
909 static int
910 main(int argc, char *argv[])
911 {
912 char errbuf[PCAP_ERRBUF_SIZE];
913 int x;
914 struct stat sb;
915 int readfile_state = 0;
916 struct bpf_program fp;
918 port53 = htons(53);
919 SubReport = Sources_report;
920 ignore_addr.s_addr = 0;
921 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
922 srandom(time(NULL));
923 ResetCounters();
925 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
926 switch (x) {
927 case 'a':
928 anon_flag = 1;
929 break;
930 case 's':
931 sld_flag = 1;
932 break;
933 case 't':
934 nld_flag = 1;
935 break;
936 case 'p':
937 promisc_flag = 0;
938 break;
939 case 'b':
940 bpf_program_str = strdup(optarg);
941 break;
942 case 'i':
943 ignore_addr.s_addr = inet_addr(optarg);
944 break;
945 case 'f':
946 set_filter(optarg);
947 break;
948 default:
949 usage();
950 break;
951 }
952 }
953 argc -= optind;
954 argv += optind;
956 if (argc < 1)
957 usage();
958 device = strdup(argv[0]);
960 if (0 == stat(device, &sb))
961 readfile_state = 1;
962 if (readfile_state) {
963 pcap_obj = pcap_open_offline(device, errbuf);
964 } else {
965 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
966 }
967 if (NULL == pcap_obj) {
968 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
969 exit(1);
970 }
972 if (0 == isatty(1)) {
973 if (0 == readfile_state) {
974 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
975 exit(1);
976 }
977 interactive = 0;
978 print_func = printf;
979 }
981 memset(&fp, '\0', sizeof(fp));
982 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
983 if (x < 0) {
984 fprintf(stderr, "pcap_compile failed\n");
985 exit(1);
986 }
987 x = pcap_setfilter(pcap_obj, &fp);
988 if (x < 0) {
989 fprintf(stderr, "pcap_setfilter failed\n");
990 exit(1);
991 }
993 /*
994 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
995 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
996 */
997 x = pcap_setnonblock(pcap_obj, 1, errbuf);
998 if (x < 0) {
999 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
1000 exit(1);
1001 }
1003 switch (pcap_datalink(pcap_obj)) {
1004 case DLT_EN10MB:
1005 handle_datalink = handle_ether;
1006 break;
1007 #if HAVE_NET_IF_PPP_H
1008 case DLT_PPP:
1009 handle_datalink = handle_ppp;
1010 break;
1011 #endif
1012 #ifdef DLT_LOOP
1013 case DLT_LOOP:
1014 handle_datalink = handle_loop;
1015 break;
1016 #endif
1017 #ifdef DLT_RAW
1018 case DLT_RAW:
1019 handle_datalink = handle_raw;
1020 break;
1021 #endif
1022 case DLT_NULL:
1023 handle_datalink = handle_null;
1024 break;
1025 default:
1026 fprintf(stderr, "unsupported data link type %d\n",
1027 pcap_datalink(pcap_obj));
1028 return 1;
1029 break;
1030 }
1031 if (interactive) {
1032 init_curses();
1033 while (0 == Quit) {
1034 if (readfile_state < 2) {
1035 /*
1036 * On some OSes select() might return 0 even when
1037 * there are packets to process. Thus, we always
1038 * ignore its return value and just call pcap_dispatch()
1039 * anyway.
1040 */
1041 if (0 == readfile_state) /* interactive */
1042 pcap_select(pcap_obj, 1, 0);
1043 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1044 }
1045 if (0 == x && 1 == readfile_state) {
1046 /* block on keyboard until user quits */
1047 readfile_state++;
1048 nodelay(w, 0);
1049 }
1050 keyboard();
1051 cron_pre();
1052 report();
1053 cron_post();
1054 }
1055 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1056 } else {
1057 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1058 (void) 0;
1059 cron_pre();
1060 Sources_report(); print_func("\n");
1061 Destinatioreport(); print_func("\n");
1062 Qtypes_report(); print_func("\n");
1063 Opcodes_report(); print_func("\n");
1064 Tld_report(); print_func("\n");
1065 Sld_report(); print_func("\n");
1066 Nld_report(); print_func("\n");
1067 SldBySource_report();
1068 }
1070 pcap_close(pcap_obj);
1071 return 0;
1072 } /* static int main(int argc, char *argv[]) */
1073 #endif
1074 /*
1075 * vim:shiftwidth=4:tabstop=8:softtabstop=4
1076 */