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 #include "collectd.h"
38 #if HAVE_NETINET_IN_H
39 # include <netinet/in.h>
40 #endif
41 #if HAVE_PCAP_H
42 # include <pcap.h>
43 #endif
44 #if HAVE_ARPA_INET_H
45 # include <arpa/inet.h>
46 #endif
48 #if HAVE_ARPA_NAMESER_H
49 # include <arpa/nameser.h>
50 #elif HAVE_ARPA_NAMESER_COMPAT_H
51 # include <arpa/nameser_compat.h>
52 #endif
54 #if HAVE_NET_IF_ARP_H
55 # include <net/if_arp.h>
56 #endif
57 #if HAVE_NET_IF_H
58 # include <net/if.h>
59 #endif
60 #if HAVE_NETINET_IF_ETHER_H
61 # include <netinet/if_ether.h>
62 #endif
63 #if HAVE_NET_IF_PPP_H
64 # include <net/if_ppp.h>
65 #endif
67 #if HAVE_SYS_SOCKET_H
68 # include <sys/socket.h>
69 #endif
70 #if HAVE_NETDB_H
71 # include <netdb.h>
72 #endif
74 #if HAVE_NETINET_IN_SYSTM_H
75 # include <netinet/in_systm.h>
76 #endif
77 #if HAVE_NETINET_IN_H
78 # include <netinet/in.h>
79 #endif
80 #if HAVE_NETINET_IP_H
81 # include <netinet/ip.h>
82 #endif
83 #ifdef HAVE_NETINET_IP_VAR_H
84 # include <netinet/ip_var.h>
85 #endif
86 #if HAVE_NETINET_IP6_H
87 # include <netinet/ip6.h>
88 #endif
89 #if HAVE_NETINET_UDP_H
90 # include <netinet/udp.h>
91 #endif
93 #define PCAP_SNAPLEN 1460
94 #ifndef ETHER_HDR_LEN
95 #define ETHER_ADDR_LEN 6
96 #define ETHER_TYPE_LEN 2
97 #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
98 #endif
99 #ifndef ETHERTYPE_8021Q
100 # define ETHERTYPE_8021Q 0x8100
101 #endif
102 #ifndef ETHERTYPE_IPV6
103 # define ETHERTYPE_IPV6 0x86DD
104 #endif
106 #ifndef PPP_ADDRESS_VAL
107 # define PPP_ADDRESS_VAL 0xff /* The address byte value */
108 #endif
109 #ifndef PPP_CONTROL_VAL
110 # define PPP_CONTROL_VAL 0x03 /* The control byte value */
111 #endif
113 #if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
114 # define UDP_DEST uh_dport
115 # define UDP_SRC uh_dport
116 #elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
117 # define UDP_DEST dest
118 # define UDP_SRC source
119 #else
120 # error "`struct udphdr' is unusable."
121 #endif
123 #include "utils_dns.h"
125 /*
126 * Type definitions
127 */
128 struct ip_list_s
129 {
130 struct in6_addr addr;
131 void *data;
132 struct ip_list_s *next;
133 };
134 typedef struct ip_list_s ip_list_t;
136 typedef int (printer)(const char *, ...);
138 /*
139 * flags/features for non-interactive mode
140 */
142 #ifndef T_A6
143 #define T_A6 38
144 #endif
145 #ifndef T_SRV
146 #define T_SRV 33
147 #endif
149 /*
150 * Global variables
151 */
152 int qtype_counts[T_MAX];
153 int opcode_counts[OP_MAX];
154 int qclass_counts[C_MAX];
156 #if HAVE_PCAP_H
157 static pcap_t *pcap_obj = NULL;
158 #endif
160 static ip_list_t *IgnoreList = NULL;
162 #if HAVE_PCAP_H
163 static void (*Callback) (const rfc1035_header_t *) = NULL;
165 static int query_count_intvl = 0;
166 static int query_count_total = 0;
167 # ifdef __OpenBSD__
168 static struct bpf_timeval last_ts;
169 # else
170 static struct timeval last_ts;
171 # endif /* __OpenBSD__ */
172 #endif /* HAVE_PCAP_H */
174 static int cmp_in6_addr (const struct in6_addr *a,
175 const struct in6_addr *b)
176 {
177 int i;
179 assert (sizeof (struct in6_addr) == 16);
181 for (i = 0; i < 16; i++)
182 if (a->s6_addr[i] != b->s6_addr[i])
183 break;
185 if (i >= 16)
186 return (0);
188 return (a->s6_addr[i] > b->s6_addr[i] ? 1 : -1);
189 } /* int cmp_addrinfo */
191 static inline int ignore_list_match (const struct in6_addr *addr)
192 {
193 ip_list_t *ptr;
195 for (ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
196 if (cmp_in6_addr (addr, &ptr->addr) == 0)
197 return (1);
198 return (0);
199 } /* int ignore_list_match */
201 static void ignore_list_add (const struct in6_addr *addr)
202 {
203 ip_list_t *new;
205 if (ignore_list_match (addr) != 0)
206 return;
208 new = malloc (sizeof (ip_list_t));
209 if (new == NULL)
210 {
211 perror ("malloc");
212 return;
213 }
215 memcpy (&new->addr, addr, sizeof (struct in6_addr));
216 new->next = IgnoreList;
218 IgnoreList = new;
219 } /* void ignore_list_add */
221 void ignore_list_add_name (const char *name)
222 {
223 struct addrinfo *ai_list;
224 struct addrinfo *ai_ptr;
225 struct in6_addr addr;
226 int status;
228 status = getaddrinfo (name, NULL, NULL, &ai_list);
229 if (status != 0)
230 return;
232 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
233 {
234 if (ai_ptr->ai_family == AF_INET)
235 {
236 memset (&addr, '\0', sizeof (addr));
237 addr.s6_addr[10] = 0xFF;
238 addr.s6_addr[11] = 0xFF;
239 memcpy (addr.s6_addr + 12, &((struct sockaddr_in *) ai_ptr->ai_addr)->sin_addr, 4);
241 ignore_list_add (&addr);
242 }
243 else
244 {
245 ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
246 }
247 } /* for */
249 freeaddrinfo (ai_list);
250 }
252 #if HAVE_PCAP_H
253 static void in6_addr_from_buffer (struct in6_addr *ia,
254 const void *buf, size_t buf_len,
255 int family)
256 {
257 memset (ia, 0, sizeof (struct in6_addr));
258 if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
259 {
260 ia->s6_addr[10] = 0xFF;
261 ia->s6_addr[11] = 0xFF;
262 memcpy (ia->s6_addr + 12, buf, buf_len);
263 }
264 else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
265 {
266 memcpy (ia, buf, buf_len);
267 }
268 } /* void in6_addr_from_buffer */
270 void dnstop_set_pcap_obj (pcap_t *po)
271 {
272 pcap_obj = po;
273 }
275 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
276 {
277 Callback = cb;
278 }
280 #define RFC1035_MAXLABELSZ 63
281 static int
282 rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns
283 )
284 {
285 off_t no = 0;
286 unsigned char c;
287 size_t len;
288 assert(ns > 0);
289 do {
290 if ((*off) >= sz)
291 break;
292 c = *(buf + (*off));
293 if (c > 191) {
294 /* blasted compression */
295 unsigned short s;
296 off_t ptr;
297 memcpy(&s, buf + (*off), sizeof(s));
298 s = ntohs(s);
299 (*off) += sizeof(s);
300 /* Sanity check */
301 if ((*off) >= sz)
302 return 1;
303 ptr = s & 0x3FFF;
304 /* Make sure the pointer is inside this message */
305 if (ptr >= sz)
306 return 2;
307 return rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
308 } else if (c > RFC1035_MAXLABELSZ) {
309 /*
310 * "(The 10 and 01 combinations are reserved for future use.)"
311 */
312 break;
313 return 3;
314 } else {
315 (*off)++;
316 len = (size_t) c;
317 if (len == 0)
318 break;
319 if (len > (ns - 1))
320 len = ns - 1;
321 if ((*off) + len > sz) /* message is too short */
322 return 4;
323 memcpy(name + no, buf + (*off), len);
324 (*off) += len;
325 no += len;
326 *(name + (no++)) = '.';
327 }
328 } while (c > 0);
329 *(name + no - 1) = '\0';
330 /* make sure we didn't allow someone to overflow the name buffer */
331 assert(no <= ns);
332 return 0;
333 }
335 static int
336 handle_dns(const char *buf, int len,
337 const struct in6_addr *s_addr,
338 const struct in6_addr *d_addr)
339 {
340 rfc1035_header_t qh;
341 uint16_t us;
342 off_t offset;
343 char *t;
344 int x;
346 /* The DNS header is 12 bytes long */
347 if (len < 12)
348 return 0;
350 memcpy(&us, buf + 0, 2);
351 qh.id = ntohs(us);
353 memcpy(&us, buf + 2, 2);
354 us = ntohs(us);
355 fprintf (stderr, "Bytes 0, 1: 0x%04hx\n", us);
356 qh.qr = (us >> 15) & 0x01;
357 qh.opcode = (us >> 11) & 0x0F;
358 qh.aa = (us >> 10) & 0x01;
359 qh.tc = (us >> 9) & 0x01;
360 qh.rd = (us >> 8) & 0x01;
361 qh.ra = (us >> 7) & 0x01;
362 qh.z = (us >> 6) & 0x01;
363 qh.ad = (us >> 5) & 0x01;
364 qh.cd = (us >> 4) & 0x01;
365 qh.rcode = us & 0x0F;
367 memcpy(&us, buf + 4, 2);
368 qh.qdcount = ntohs(us);
370 memcpy(&us, buf + 6, 2);
371 qh.ancount = ntohs(us);
373 memcpy(&us, buf + 8, 2);
374 qh.nscount = ntohs(us);
376 memcpy(&us, buf + 10, 2);
377 qh.arcount = ntohs(us);
379 offset = 12;
380 memset(qh.qname, '\0', MAX_QNAME_SZ);
381 x = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
382 if (0 != x)
383 return 0;
384 if ('\0' == qh.qname[0])
385 strcpy(qh.qname, ".");
386 while ((t = strchr(qh.qname, '\n')))
387 *t = ' ';
388 while ((t = strchr(qh.qname, '\r')))
389 *t = ' ';
390 for (t = qh.qname; *t; t++)
391 *t = tolower(*t);
393 memcpy(&us, buf + offset, 2);
394 qh.qtype = ntohs(us);
395 memcpy(&us, buf + offset + 2, 2);
396 qh.qclass = ntohs(us);
398 qh.length = (uint16_t) len;
400 /* gather stats */
401 qtype_counts[qh.qtype]++;
402 qclass_counts[qh.qclass]++;
403 opcode_counts[qh.opcode]++;
405 if (Callback != NULL)
406 Callback (&qh);
408 return 1;
409 }
411 static int
412 handle_udp(const struct udphdr *udp, int len,
413 const struct in6_addr *s_addr,
414 const struct in6_addr *d_addr)
415 {
416 char buf[PCAP_SNAPLEN];
417 if ((ntohs (udp->UDP_DEST) != 53)
418 && (ntohs (udp->UDP_SRC) != 53))
419 return 0;
420 memcpy(buf, udp + 1, len - sizeof(*udp));
421 if (0 == handle_dns(buf, len - sizeof(*udp), s_addr, d_addr))
422 return 0;
423 return 1;
424 }
426 static int
427 handle_ipv6 (struct ip6_hdr *ipv6, int len)
428 {
429 char buf[PCAP_SNAPLEN];
430 int offset;
431 int nexthdr;
433 struct in6_addr s_addr;
434 struct in6_addr d_addr;
435 uint16_t payload_len;
437 offset = sizeof (struct ip6_hdr);
438 nexthdr = ipv6->ip6_nxt;
439 s_addr = ipv6->ip6_src;
440 d_addr = ipv6->ip6_dst;
441 payload_len = ntohs (ipv6->ip6_plen);
443 if (ignore_list_match (&s_addr))
444 return (0);
446 /* Parse extension headers. This only handles the standard headers, as
447 * defined in RFC 2460, correctly. Fragments are discarded. */
448 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
449 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
450 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
451 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
452 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
453 || (IPPROTO_AH == nexthdr) /* destination options. */
454 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
455 {
456 struct ip6_ext ext_hdr;
457 uint16_t ext_hdr_len;
459 /* Catch broken packets */
460 if ((offset + sizeof (struct ip6_ext)) > len)
461 return (0);
463 /* Cannot handle fragments. */
464 if (IPPROTO_FRAGMENT == nexthdr)
465 return (0);
467 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
468 nexthdr = ext_hdr.ip6e_nxt;
469 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
471 /* This header is longer than the packets payload.. WTF? */
472 if (ext_hdr_len > payload_len)
473 return (0);
475 offset += ext_hdr_len;
476 payload_len -= ext_hdr_len;
477 } /* while */
479 /* Catch broken and empty packets */
480 if (((offset + payload_len) > len)
481 || (payload_len == 0)
482 || (payload_len > PCAP_SNAPLEN))
483 return (0);
485 if (IPPROTO_UDP != nexthdr)
486 return (0);
488 memcpy (buf, (char *) ipv6 + offset, payload_len);
489 if (handle_udp ((struct udphdr *) buf, payload_len, &s_addr, &d_addr) == 0)
490 return (0);
492 return (1); /* Success */
493 } /* int handle_ipv6 */
495 static int
496 handle_ip(const struct ip *ip, int len)
497 {
498 char buf[PCAP_SNAPLEN];
499 int offset = ip->ip_hl << 2;
500 struct in6_addr s_addr;
501 struct in6_addr d_addr;
503 if (ip->ip_v == 6)
504 return (handle_ipv6 ((struct ip6_hdr *) ip, len));
506 in6_addr_from_buffer (&s_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
507 in6_addr_from_buffer (&d_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
508 if (ignore_list_match (&s_addr))
509 return (0);
510 if (IPPROTO_UDP != ip->ip_p)
511 return 0;
512 memcpy(buf, (void *) ip + offset, len - offset);
513 if (0 == handle_udp((struct udphdr *) buf, len - offset, &s_addr, &d_addr))
514 return 0;
515 return 1;
516 }
518 #if HAVE_NET_IF_PPP_H
519 static int
520 handle_ppp(const u_char * pkt, int len)
521 {
522 char buf[PCAP_SNAPLEN];
523 unsigned short us;
524 unsigned short proto;
525 if (len < 2)
526 return 0;
527 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
528 pkt += 2; /* ACFC not used */
529 len -= 2;
530 }
531 if (len < 2)
532 return 0;
533 if (*pkt % 2) {
534 proto = *pkt; /* PFC is used */
535 pkt++;
536 len--;
537 } else {
538 memcpy(&us, pkt, sizeof(us));
539 proto = ntohs(us);
540 pkt += 2;
541 len -= 2;
542 }
543 if (ETHERTYPE_IP != proto && PPP_IP != proto)
544 return 0;
545 memcpy(buf, pkt, len);
546 return handle_ip((struct ip *) buf, len);
547 }
548 #endif /* HAVE_NET_IF_PPP_H */
550 static int
551 handle_null(const u_char * pkt, int len)
552 {
553 unsigned int family;
554 memcpy(&family, pkt, sizeof(family));
555 if (AF_INET != family)
556 return 0;
557 return handle_ip((struct ip *) (pkt + 4), len - 4);
558 }
560 #ifdef DLT_LOOP
561 static int
562 handle_loop(const u_char * pkt, int len)
563 {
564 unsigned int family;
565 memcpy(&family, pkt, sizeof(family));
566 if (AF_INET != ntohl(family))
567 return 0;
568 return handle_ip((struct ip *) (pkt + 4), len - 4);
569 }
571 #endif
573 #ifdef DLT_RAW
574 static int
575 handle_raw(const u_char * pkt, int len)
576 {
577 return handle_ip((struct ip *) pkt, len);
578 }
580 #endif
582 static int
583 handle_ether(const u_char * pkt, int len)
584 {
585 char buf[PCAP_SNAPLEN];
586 struct ether_header *e = (void *) pkt;
587 unsigned short etype = ntohs(e->ether_type);
588 if (len < ETHER_HDR_LEN)
589 return 0;
590 pkt += ETHER_HDR_LEN;
591 len -= ETHER_HDR_LEN;
592 if (ETHERTYPE_8021Q == etype) {
593 etype = ntohs(*(unsigned short *) (pkt + 2));
594 pkt += 4;
595 len -= 4;
596 }
597 if ((ETHERTYPE_IP != etype)
598 && (ETHERTYPE_IPV6 != etype))
599 return 0;
600 memcpy(buf, pkt, len);
601 if (ETHERTYPE_IPV6 == etype)
602 return (handle_ipv6 ((struct ip6_hdr *) buf, len));
603 else
604 return handle_ip((struct ip *) buf, len);
605 }
607 #ifdef DLT_LINUX_SLL
608 static int
609 handle_linux_sll (const u_char *pkt, int len)
610 {
611 struct sll_header
612 {
613 uint16_t pkt_type;
614 uint16_t dev_type;
615 uint16_t addr_len;
616 uint8_t addr[8];
617 uint16_t proto_type;
618 } *hdr;
619 uint16_t etype;
621 if (len < sizeof (struct sll_header))
622 return (0);
624 hdr = (struct sll_header *) pkt;
625 pkt = (u_char *) (hdr + 1);
626 len -= sizeof (struct sll_header);
628 etype = ntohs (hdr->proto_type);
630 if ((ETHERTYPE_IP != etype)
631 && (ETHERTYPE_IPV6 != etype))
632 return 0;
634 if (ETHERTYPE_IPV6 == etype)
635 return (handle_ipv6 ((struct ip6_hdr *) pkt, len));
636 else
637 return handle_ip((struct ip *) pkt, len);
638 }
639 #endif /* DLT_LINUX_SLL */
641 /* public function */
642 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
643 {
644 int status;
646 fprintf (stderr, "handle_pcap (udata = %p, hdr = %p, pkt = %p): hdr->caplen = %i\n",
647 (void *) udata, (void *) hdr, (void *) pkt,
648 hdr->caplen);
650 if (hdr->caplen < ETHER_HDR_LEN)
651 return;
653 switch (pcap_datalink (pcap_obj))
654 {
655 case DLT_EN10MB:
656 status = handle_ether (pkt, hdr->caplen);
657 break;
658 #if HAVE_NET_IF_PPP_H
659 case DLT_PPP:
660 status = handle_ppp (pkt, hdr->caplen);
661 break;
662 #endif
663 #ifdef DLT_LOOP
664 case DLT_LOOP:
665 status = handle_loop (pkt, hdr->caplen);
666 break;
667 #endif
668 #ifdef DLT_RAW
669 case DLT_RAW:
670 status = handle_raw (pkt, hdr->caplen);
671 break;
672 #endif
673 #ifdef DLT_LINUX_SLL
674 case DLT_LINUX_SLL:
675 status = handle_linux_sll (pkt, hdr->caplen);
676 break;
677 #endif
678 case DLT_NULL:
679 status = handle_null (pkt, hdr->caplen);
680 break;
682 default:
683 fprintf (stderr, "unsupported data link type %d\n",
684 pcap_datalink(pcap_obj));
685 status = 0;
686 break;
687 } /* switch (pcap_datalink(pcap_obj)) */
689 if (0 == status)
690 return;
692 query_count_intvl++;
693 query_count_total++;
694 last_ts = hdr->ts;
695 }
696 #endif /* HAVE_PCAP_H */
698 const char *qtype_str(int t)
699 {
700 static char buf[32];
701 switch (t) {
702 case ns_t_a: return ("A");
703 case ns_t_ns: return ("NS");
704 case ns_t_md: return ("MD");
705 case ns_t_mf: return ("MF");
706 case ns_t_cname: return ("CNAME");
707 case ns_t_soa: return ("SOA");
708 case ns_t_mb: return ("MB");
709 case ns_t_mg: return ("MG");
710 case ns_t_mr: return ("MR");
711 case ns_t_null: return ("NULL");
712 case ns_t_wks: return ("WKS");
713 case ns_t_ptr: return ("PTR");
714 case ns_t_hinfo: return ("HINFO");
715 case ns_t_minfo: return ("MINFO");
716 case ns_t_mx: return ("MX");
717 case ns_t_txt: return ("TXT");
718 case ns_t_rp: return ("RP");
719 case ns_t_afsdb: return ("AFSDB");
720 case ns_t_x25: return ("X25");
721 case ns_t_isdn: return ("ISDN");
722 case ns_t_rt: return ("RT");
723 case ns_t_nsap: return ("NSAP");
724 case ns_t_nsap_ptr: return ("NSAP-PTR");
725 case ns_t_sig: return ("SIG");
726 case ns_t_key: return ("KEY");
727 case ns_t_px: return ("PX");
728 case ns_t_gpos: return ("GPOS");
729 case ns_t_aaaa: return ("AAAA");
730 case ns_t_loc: return ("LOC");
731 case ns_t_nxt: return ("NXT");
732 case ns_t_eid: return ("EID");
733 case ns_t_nimloc: return ("NIMLOC");
734 case ns_t_srv: return ("SRV");
735 case ns_t_atma: return ("ATMA");
736 case ns_t_naptr: return ("NAPTR");
737 case ns_t_kx: return ("KX");
738 case ns_t_cert: return ("CERT");
739 case ns_t_a6: return ("A6");
740 case ns_t_dname: return ("DNAME");
741 case ns_t_sink: return ("SINK");
742 case ns_t_opt: return ("OPT");
743 case ns_t_tsig: return ("TSIG");
744 case ns_t_ixfr: return ("IXFR");
745 case ns_t_axfr: return ("AXFR");
746 case ns_t_mailb: return ("MAILB");
747 case ns_t_maila: return ("MAILA");
748 case ns_t_any: return ("ANY");
749 case ns_t_zxfr: return ("ZXFR");
750 default:
751 snprintf (buf, 32, "#%i", t);
752 buf[31] = '\0';
753 return (buf);
754 }; /* switch (t) */
755 /* NOTREACHED */
756 return (NULL);
757 }
759 const char *opcode_str (int o)
760 {
761 static char buf[30];
762 switch (o) {
763 case 0:
764 return "Query";
765 break;
766 case 1:
767 return "Iquery";
768 break;
769 case 2:
770 return "Status";
771 break;
772 case 4:
773 return "Notify";
774 break;
775 case 5:
776 return "Update";
777 break;
778 default:
779 snprintf(buf, 30, "Opcode%d", o);
780 return buf;
781 }
782 /* NOTREACHED */
783 }
785 const char *rcode_str (int rcode)
786 {
787 static char buf[32];
788 switch (rcode)
789 {
790 case ns_r_noerror: return ("NOERROR");
791 case ns_r_formerr: return ("FORMERR");
792 case ns_r_servfail: return ("SERVFAIL");
793 case ns_r_nxdomain: return ("NXDOMAIN");
794 case ns_r_notimpl: return ("NOTIMPL");
795 case ns_r_refused: return ("REFUSED");
796 case ns_r_yxdomain: return ("YXDOMAIN");
797 case ns_r_yxrrset: return ("YXRRSET");
798 case ns_r_nxrrset: return ("NXRRSET");
799 case ns_r_notauth: return ("NOTAUTH");
800 case ns_r_notzone: return ("NOTZONE");
801 case ns_r_max: return ("MAX");
802 case ns_r_badsig: return ("BADSIG");
803 case ns_r_badkey: return ("BADKEY");
804 case ns_r_badtime: return ("BADTIME");
805 default:
806 snprintf (buf, 32, "RCode%i", rcode);
807 buf[31] = '\0';
808 return (buf);
809 }
810 /* Never reached */
811 return (NULL);
812 } /* const char *rcode_str (int rcode) */
814 #if 0
815 static int
816 main(int argc, char *argv[])
817 {
818 char errbuf[PCAP_ERRBUF_SIZE];
819 int x;
820 struct stat sb;
821 int readfile_state = 0;
822 struct bpf_program fp;
824 port53 = htons(53);
825 SubReport = Sources_report;
826 ignore_addr.s_addr = 0;
827 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
828 srandom(time(NULL));
829 ResetCounters();
831 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
832 switch (x) {
833 case 'a':
834 anon_flag = 1;
835 break;
836 case 's':
837 sld_flag = 1;
838 break;
839 case 't':
840 nld_flag = 1;
841 break;
842 case 'p':
843 promisc_flag = 0;
844 break;
845 case 'b':
846 bpf_program_str = strdup(optarg);
847 break;
848 case 'i':
849 ignore_addr.s_addr = inet_addr(optarg);
850 break;
851 case 'f':
852 set_filter(optarg);
853 break;
854 default:
855 usage();
856 break;
857 }
858 }
859 argc -= optind;
860 argv += optind;
862 if (argc < 1)
863 usage();
864 device = strdup(argv[0]);
866 if (0 == stat(device, &sb))
867 readfile_state = 1;
868 if (readfile_state) {
869 pcap_obj = pcap_open_offline(device, errbuf);
870 } else {
871 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
872 }
873 if (NULL == pcap_obj) {
874 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
875 exit(1);
876 }
878 if (0 == isatty(1)) {
879 if (0 == readfile_state) {
880 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
881 exit(1);
882 }
883 interactive = 0;
884 print_func = printf;
885 }
887 memset(&fp, '\0', sizeof(fp));
888 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
889 if (x < 0) {
890 fprintf(stderr, "pcap_compile failed\n");
891 exit(1);
892 }
893 x = pcap_setfilter(pcap_obj, &fp);
894 if (x < 0) {
895 fprintf(stderr, "pcap_setfilter failed\n");
896 exit(1);
897 }
899 /*
900 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
901 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
902 */
903 x = pcap_setnonblock(pcap_obj, 1, errbuf);
904 if (x < 0) {
905 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
906 exit(1);
907 }
909 switch (pcap_datalink(pcap_obj)) {
910 case DLT_EN10MB:
911 handle_datalink = handle_ether;
912 break;
913 #if HAVE_NET_IF_PPP_H
914 case DLT_PPP:
915 handle_datalink = handle_ppp;
916 break;
917 #endif
918 #ifdef DLT_LOOP
919 case DLT_LOOP:
920 handle_datalink = handle_loop;
921 break;
922 #endif
923 #ifdef DLT_RAW
924 case DLT_RAW:
925 handle_datalink = handle_raw;
926 break;
927 #endif
928 case DLT_NULL:
929 handle_datalink = handle_null;
930 break;
931 default:
932 fprintf(stderr, "unsupported data link type %d\n",
933 pcap_datalink(pcap_obj));
934 return 1;
935 break;
936 }
937 if (interactive) {
938 init_curses();
939 while (0 == Quit) {
940 if (readfile_state < 2) {
941 /*
942 * On some OSes select() might return 0 even when
943 * there are packets to process. Thus, we always
944 * ignore its return value and just call pcap_dispatch()
945 * anyway.
946 */
947 if (0 == readfile_state) /* interactive */
948 pcap_select(pcap_obj, 1, 0);
949 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
950 }
951 if (0 == x && 1 == readfile_state) {
952 /* block on keyboard until user quits */
953 readfile_state++;
954 nodelay(w, 0);
955 }
956 keyboard();
957 cron_pre();
958 report();
959 cron_post();
960 }
961 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
962 } else {
963 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
964 (void) 0;
965 cron_pre();
966 Sources_report(); print_func("\n");
967 Destinatioreport(); print_func("\n");
968 Qtypes_report(); print_func("\n");
969 Opcodes_report(); print_func("\n");
970 Tld_report(); print_func("\n");
971 Sld_report(); print_func("\n");
972 Nld_report(); print_func("\n");
973 SldBySource_report();
974 }
976 pcap_close(pcap_obj);
977 return 0;
978 } /* static int main(int argc, char *argv[]) */
979 #endif
980 /*
981 * vim:shiftwidth=4:tabstop=8:softtabstop=4
982 */