2 * collectd - src/utils_dns.c
3 * Copyright (C) 2006 Florian octo Forster
4 * Copyright (C) 2002 The Measurement Factory, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
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.
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.
32 * The Measurement Factory, Inc. <http://www.measurement-factory.com/>
33 * Florian octo Forster <octo at collectd.org>
43 # include <sys/socket.h>
47 # include <net/if_arp.h>
52 #if HAVE_NET_PPP_DEFS_H
53 # include <net/ppp_defs.h>
56 # include <net/if_ppp.h>
59 #if HAVE_NETINET_IN_SYSTM_H
60 # include <netinet/in_systm.h>
63 # include <netinet/in.h>
65 #if HAVE_NETINET_IP6_H
66 # include <netinet/ip6.h>
68 #if HAVE_NETINET_IP_COMPAT_H
69 # include <netinet/ip_compat.h>
71 #if HAVE_NETINET_IF_ETHER_H
72 # include <netinet/if_ether.h>
75 # include <netinet/ip.h>
77 #ifdef HAVE_NETINET_IP_VAR_H
78 # include <netinet/ip_var.h>
80 #if HAVE_NETINET_UDP_H
81 # include <netinet/udp.h>
85 # include <arpa/inet.h>
87 #if HAVE_ARPA_NAMESER_H
88 # include <arpa/nameser.h>
90 #if HAVE_ARPA_NAMESER_COMPAT_H
91 # include <arpa/nameser_compat.h>
102 #define PCAP_SNAPLEN 1460
103 #ifndef ETHER_HDR_LEN
104 #define ETHER_ADDR_LEN 6
105 #define ETHER_TYPE_LEN 2
106 #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
108 #ifndef ETHERTYPE_8021Q
109 # define ETHERTYPE_8021Q 0x8100
111 #ifndef ETHERTYPE_IPV6
112 # define ETHERTYPE_IPV6 0x86DD
115 #ifndef PPP_ADDRESS_VAL
116 # define PPP_ADDRESS_VAL 0xff /* The address byte value */
118 #ifndef PPP_CONTROL_VAL
119 # define PPP_CONTROL_VAL 0x03 /* The control byte value */
122 #if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
123 # define UDP_DEST uh_dport
124 # define UDP_SRC uh_sport
125 #elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
126 # define UDP_DEST dest
127 # define UDP_SRC source
129 # error "`struct udphdr' is unusable."
132 #include "utils_dns.h"
139 struct in6_addr addr;
141 struct ip_list_s *next;
143 typedef struct ip_list_s ip_list_t;
145 typedef int (printer)(const char *, ...);
148 * flags/features for non-interactive mode
161 int qtype_counts[T_MAX];
162 int opcode_counts[OP_MAX];
163 int qclass_counts[C_MAX];
166 static pcap_t *pcap_obj = NULL;
169 static ip_list_t *IgnoreList = NULL;
172 static void (*Callback) (const rfc1035_header_t *) = NULL;
174 static int query_count_intvl = 0;
175 static int query_count_total = 0;
177 static struct bpf_timeval last_ts;
179 static struct timeval last_ts;
180 # endif /* __OpenBSD__ */
181 #endif /* HAVE_PCAP_H */
183 static int cmp_in6_addr (const struct in6_addr *a,
184 const struct in6_addr *b)
188 assert (sizeof (struct in6_addr) == 16);
190 for (i = 0; i < 16; i++)
191 if (a->s6_addr[i] != b->s6_addr[i])
197 return (a->s6_addr[i] > b->s6_addr[i] ? 1 : -1);
198 } /* int cmp_addrinfo */
200 static inline int ignore_list_match (const struct in6_addr *addr)
204 for (ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
205 if (cmp_in6_addr (addr, &ptr->addr) == 0)
208 } /* int ignore_list_match */
210 static void ignore_list_add (const struct in6_addr *addr)
214 if (ignore_list_match (addr) != 0)
217 new = malloc (sizeof (ip_list_t));
224 memcpy (&new->addr, addr, sizeof (struct in6_addr));
225 new->next = IgnoreList;
228 } /* void ignore_list_add */
230 void ignore_list_add_name (const char *name)
232 struct addrinfo *ai_list;
233 struct addrinfo *ai_ptr;
234 struct in6_addr addr;
237 status = getaddrinfo (name, NULL, NULL, &ai_list);
241 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
243 if (ai_ptr->ai_family == AF_INET)
245 memset (&addr, '\0', sizeof (addr));
246 addr.s6_addr[10] = 0xFF;
247 addr.s6_addr[11] = 0xFF;
248 memcpy (addr.s6_addr + 12, &((struct sockaddr_in *) ai_ptr->ai_addr)->sin_addr, 4);
250 ignore_list_add (&addr);
254 ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
258 freeaddrinfo (ai_list);
262 static void in6_addr_from_buffer (struct in6_addr *ia,
263 const void *buf, size_t buf_len,
266 memset (ia, 0, sizeof (struct in6_addr));
267 if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
269 ia->s6_addr[10] = 0xFF;
270 ia->s6_addr[11] = 0xFF;
271 memcpy (ia->s6_addr + 12, buf, buf_len);
273 else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
275 memcpy (ia, buf, buf_len);
277 } /* void in6_addr_from_buffer */
279 void dnstop_set_pcap_obj (pcap_t *po)
284 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
289 #define RFC1035_MAXLABELSZ 63
291 rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns
297 static int loop_detect = 0;
299 return 4; /* compression loop */
301 return 4; /* probably compression loop */
307 /* blasted compression */
311 memcpy(&s, buf + (*off), sizeof(s));
316 return 1; /* message too short */
318 /* Make sure the pointer is inside this message */
320 return 2; /* bad compression ptr */
321 if (ptr < DNS_MSG_HDR_SZ)
322 return 2; /* bad compression ptr */
324 rc = rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
327 } else if (c > RFC1035_MAXLABELSZ) {
329 * "(The 10 and 01 combinations are reserved for future use.)"
331 return 3; /* reserved label/compression flags */
340 if ((*off) + len > sz)
341 return 4; /* message is too short */
342 if (no + len + 1 > ns)
343 return 5; /* qname would overflow name buffer */
344 memcpy(name + no, buf + (*off), len);
347 *(name + (no++)) = '.';
351 *(name + no - 1) = '\0';
352 /* make sure we didn't allow someone to overflow the name buffer */
358 handle_dns(const char *buf, int len)
366 /* The DNS header is 12 bytes long */
367 if (len < DNS_MSG_HDR_SZ)
370 memcpy(&us, buf + 0, 2);
373 memcpy(&us, buf + 2, 2);
375 qh.qr = (us >> 15) & 0x01;
376 qh.opcode = (us >> 11) & 0x0F;
377 qh.aa = (us >> 10) & 0x01;
378 qh.tc = (us >> 9) & 0x01;
379 qh.rd = (us >> 8) & 0x01;
380 qh.ra = (us >> 7) & 0x01;
381 qh.z = (us >> 6) & 0x01;
382 qh.ad = (us >> 5) & 0x01;
383 qh.cd = (us >> 4) & 0x01;
384 qh.rcode = us & 0x0F;
386 memcpy(&us, buf + 4, 2);
387 qh.qdcount = ntohs(us);
389 memcpy(&us, buf + 6, 2);
390 qh.ancount = ntohs(us);
392 memcpy(&us, buf + 8, 2);
393 qh.nscount = ntohs(us);
395 memcpy(&us, buf + 10, 2);
396 qh.arcount = ntohs(us);
398 offset = DNS_MSG_HDR_SZ;
399 memset(qh.qname, '\0', MAX_QNAME_SZ);
400 status = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
403 INFO ("utils_dns: handle_dns: rfc1035NameUnpack failed "
404 "with status %i.", status);
407 if ('\0' == qh.qname[0])
408 sstrncpy (qh.qname, ".", sizeof (qh.qname));
409 while ((t = strchr(qh.qname, '\n')))
411 while ((t = strchr(qh.qname, '\r')))
413 for (t = qh.qname; *t; t++)
414 *t = tolower((int) *t);
416 memcpy(&us, buf + offset, 2);
417 qh.qtype = ntohs(us);
418 memcpy(&us, buf + offset + 2, 2);
419 qh.qclass = ntohs(us);
421 qh.length = (uint16_t) len;
424 qtype_counts[qh.qtype]++;
425 qclass_counts[qh.qclass]++;
426 opcode_counts[qh.opcode]++;
428 if (Callback != NULL)
435 handle_udp(const struct udphdr *udp, int len)
437 char buf[PCAP_SNAPLEN];
438 if ((ntohs (udp->UDP_DEST) != 53)
439 && (ntohs (udp->UDP_SRC) != 53))
441 memcpy(buf, udp + 1, len - sizeof(*udp));
442 if (0 == handle_dns(buf, len - sizeof(*udp)))
447 #if HAVE_NETINET_IP6_H
449 handle_ipv6 (struct ip6_hdr *ipv6, int len)
451 char buf[PCAP_SNAPLEN];
455 struct in6_addr c_src_addr;
456 uint16_t payload_len;
461 offset = sizeof (struct ip6_hdr);
462 nexthdr = ipv6->ip6_nxt;
463 c_src_addr = ipv6->ip6_src;
464 payload_len = ntohs (ipv6->ip6_plen);
466 if (ignore_list_match (&c_src_addr))
469 /* Parse extension headers. This only handles the standard headers, as
470 * defined in RFC 2460, correctly. Fragments are discarded. */
471 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
472 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
473 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
474 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
475 || (IPPROTO_AH == nexthdr) /* destination options. */
476 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
478 struct ip6_ext ext_hdr;
479 uint16_t ext_hdr_len;
481 /* Catch broken packets */
482 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
485 /* Cannot handle fragments. */
486 if (IPPROTO_FRAGMENT == nexthdr)
489 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
490 nexthdr = ext_hdr.ip6e_nxt;
491 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
493 /* This header is longer than the packets payload.. WTF? */
494 if (ext_hdr_len > payload_len)
497 offset += ext_hdr_len;
498 payload_len -= ext_hdr_len;
501 /* Catch broken and empty packets */
502 if (((offset + payload_len) > (unsigned int)len)
503 || (payload_len == 0)
504 || (payload_len > PCAP_SNAPLEN))
507 if (IPPROTO_UDP != nexthdr)
510 memcpy (buf, (char *) ipv6 + offset, payload_len);
511 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
514 return (1); /* Success */
515 } /* int handle_ipv6 */
516 /* #endif HAVE_NETINET_IP6_H */
518 #else /* if !HAVE_NETINET_IP6_H */
520 handle_ipv6 (__attribute__((unused)) void *pkg,
521 __attribute__((unused)) int len)
525 #endif /* !HAVE_NETINET_IP6_H */
528 handle_ip(const struct ip *ip, int len)
530 char buf[PCAP_SNAPLEN];
531 int offset = ip->ip_hl << 2;
532 struct in6_addr c_src_addr;
533 struct in6_addr c_dst_addr;
536 return (handle_ipv6 ((void *) ip, len));
538 in6_addr_from_buffer (&c_src_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
539 in6_addr_from_buffer (&c_dst_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
540 if (ignore_list_match (&c_src_addr))
542 if (IPPROTO_UDP != ip->ip_p)
544 memcpy(buf, (void *) ip + offset, len - offset);
545 if (0 == handle_udp((struct udphdr *) buf, len - offset))
550 #if HAVE_NET_IF_PPP_H
552 handle_ppp(const u_char * pkt, int len)
554 char buf[PCAP_SNAPLEN];
556 unsigned short proto;
559 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
560 pkt += 2; /* ACFC not used */
566 proto = *pkt; /* PFC is used */
570 memcpy(&us, pkt, sizeof(us));
575 if (ETHERTYPE_IP != proto && PPP_IP != proto)
577 memcpy(buf, pkt, len);
578 return handle_ip((struct ip *) buf, len);
580 #endif /* HAVE_NET_IF_PPP_H */
583 handle_null(const u_char * pkt, int len)
586 memcpy(&family, pkt, sizeof(family));
587 if (AF_INET != family)
589 return handle_ip((struct ip *) (pkt + 4), len - 4);
594 handle_loop(const u_char * pkt, int len)
597 memcpy(&family, pkt, sizeof(family));
598 if (AF_INET != ntohl(family))
600 return handle_ip((struct ip *) (pkt + 4), len - 4);
607 handle_raw(const u_char * pkt, int len)
609 return handle_ip((struct ip *) pkt, len);
615 handle_ether(const u_char * pkt, int len)
617 char buf[PCAP_SNAPLEN];
618 struct ether_header *e = (void *) pkt;
619 unsigned short etype = ntohs(e->ether_type);
620 if (len < ETHER_HDR_LEN)
622 pkt += ETHER_HDR_LEN;
623 len -= ETHER_HDR_LEN;
624 if (ETHERTYPE_8021Q == etype) {
625 etype = ntohs(*(unsigned short *) (pkt + 2));
629 if ((ETHERTYPE_IP != etype)
630 && (ETHERTYPE_IPV6 != etype))
632 memcpy(buf, pkt, len);
633 if (ETHERTYPE_IPV6 == etype)
634 return (handle_ipv6 ((void *) buf, len));
636 return handle_ip((struct ip *) buf, len);
641 handle_linux_sll (const u_char *pkt, int len)
653 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
656 hdr = (struct sll_header *) pkt;
657 pkt = (u_char *) (hdr + 1);
658 len -= sizeof (struct sll_header);
660 etype = ntohs (hdr->proto_type);
662 if ((ETHERTYPE_IP != etype)
663 && (ETHERTYPE_IPV6 != etype))
666 if (ETHERTYPE_IPV6 == etype)
667 return (handle_ipv6 ((void *) pkt, len));
669 return handle_ip((struct ip *) pkt, len);
671 #endif /* DLT_LINUX_SLL */
673 /* public function */
674 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
678 if (hdr->caplen < ETHER_HDR_LEN)
681 switch (pcap_datalink (pcap_obj))
684 status = handle_ether (pkt, hdr->caplen);
686 #if HAVE_NET_IF_PPP_H
688 status = handle_ppp (pkt, hdr->caplen);
693 status = handle_loop (pkt, hdr->caplen);
698 status = handle_raw (pkt, hdr->caplen);
703 status = handle_linux_sll (pkt, hdr->caplen);
707 status = handle_null (pkt, hdr->caplen);
711 ERROR ("handle_pcap: unsupported data link type %d",
712 pcap_datalink(pcap_obj));
715 } /* switch (pcap_datalink(pcap_obj)) */
724 #endif /* HAVE_PCAP_H */
726 const char *qtype_str(int t)
730 #if (defined (__NAMESER)) && (__NAMESER >= 19991001)
731 case ns_t_a: return ("A");
732 case ns_t_ns: return ("NS");
733 case ns_t_md: return ("MD");
734 case ns_t_mf: return ("MF");
735 case ns_t_cname: return ("CNAME");
736 case ns_t_soa: return ("SOA");
737 case ns_t_mb: return ("MB");
738 case ns_t_mg: return ("MG");
739 case ns_t_mr: return ("MR");
740 case ns_t_null: return ("NULL");
741 case ns_t_wks: return ("WKS");
742 case ns_t_ptr: return ("PTR");
743 case ns_t_hinfo: return ("HINFO");
744 case ns_t_minfo: return ("MINFO");
745 case ns_t_mx: return ("MX");
746 case ns_t_txt: return ("TXT");
747 case ns_t_rp: return ("RP");
748 case ns_t_afsdb: return ("AFSDB");
749 case ns_t_x25: return ("X25");
750 case ns_t_isdn: return ("ISDN");
751 case ns_t_rt: return ("RT");
752 case ns_t_nsap: return ("NSAP");
753 case ns_t_nsap_ptr: return ("NSAP-PTR");
754 case ns_t_sig: return ("SIG");
755 case ns_t_key: return ("KEY");
756 case ns_t_px: return ("PX");
757 case ns_t_gpos: return ("GPOS");
758 case ns_t_aaaa: return ("AAAA");
759 case ns_t_loc: return ("LOC");
760 case ns_t_nxt: return ("NXT");
761 case ns_t_eid: return ("EID");
762 case ns_t_nimloc: return ("NIMLOC");
763 case ns_t_srv: return ("SRV");
764 case ns_t_atma: return ("ATMA");
765 case ns_t_naptr: return ("NAPTR");
766 case ns_t_kx: return ("KX");
767 case ns_t_cert: return ("CERT");
768 case ns_t_a6: return ("A6");
769 case ns_t_dname: return ("DNAME");
770 case ns_t_sink: return ("SINK");
771 case ns_t_opt: return ("OPT");
772 # if __NAMESER >= 19991006
773 case ns_t_tsig: return ("TSIG");
775 case ns_t_ixfr: return ("IXFR");
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 case ns_t_zxfr: return ("ZXFR");
781 /* #endif __NAMESER >= 19991006 */
782 #elif (defined (__BIND)) && (__BIND >= 19950621)
783 case T_A: return ("A"); /* 1 ... */
784 case T_NS: return ("NS");
785 case T_MD: return ("MD");
786 case T_MF: return ("MF");
787 case T_CNAME: return ("CNAME");
788 case T_SOA: return ("SOA");
789 case T_MB: return ("MB");
790 case T_MG: return ("MG");
791 case T_MR: return ("MR");
792 case T_NULL: return ("NULL");
793 case T_WKS: return ("WKS");
794 case T_PTR: return ("PTR");
795 case T_HINFO: return ("HINFO");
796 case T_MINFO: return ("MINFO");
797 case T_MX: return ("MX");
798 case T_TXT: return ("TXT");
799 case T_RP: return ("RP");
800 case T_AFSDB: return ("AFSDB");
801 case T_X25: return ("X25");
802 case T_ISDN: return ("ISDN");
803 case T_RT: return ("RT");
804 case T_NSAP: return ("NSAP");
805 case T_NSAP_PTR: return ("NSAP_PTR");
806 case T_SIG: return ("SIG");
807 case T_KEY: return ("KEY");
808 case T_PX: return ("PX");
809 case T_GPOS: return ("GPOS");
810 case T_AAAA: return ("AAAA");
811 case T_LOC: return ("LOC");
812 case T_NXT: return ("NXT");
813 case T_EID: return ("EID");
814 case T_NIMLOC: return ("NIMLOC");
815 case T_SRV: return ("SRV");
816 case T_ATMA: return ("ATMA");
817 case T_NAPTR: return ("NAPTR"); /* ... 35 */
818 #if (__BIND >= 19960801)
819 case T_KX: return ("KX"); /* 36 ... */
820 case T_CERT: return ("CERT");
821 case T_A6: return ("A6");
822 case T_DNAME: return ("DNAME");
823 case T_SINK: return ("SINK");
824 case T_OPT: return ("OPT");
825 case T_APL: return ("APL");
826 case T_DS: return ("DS");
827 case T_SSHFP: return ("SSHFP");
828 case T_RRSIG: return ("RRSIG");
829 case T_NSEC: return ("NSEC");
830 case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
831 case T_TKEY: return ("TKEY"); /* 249 */
832 #endif /* __BIND >= 19960801 */
833 case T_TSIG: return ("TSIG"); /* 250 ... */
834 case T_IXFR: return ("IXFR");
835 case T_AXFR: return ("AXFR");
836 case T_MAILB: return ("MAILB");
837 case T_MAILA: return ("MAILA");
838 case T_ANY: return ("ANY"); /* ... 255 */
839 #endif /* __BIND >= 19950621 */
841 ssnprintf (buf, sizeof (buf), "#%i", t);
848 const char *opcode_str (int o)
868 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
874 const char *rcode_str (int rcode)
879 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
880 case ns_r_noerror: return ("NOERROR");
881 case ns_r_formerr: return ("FORMERR");
882 case ns_r_servfail: return ("SERVFAIL");
883 case ns_r_nxdomain: return ("NXDOMAIN");
884 case ns_r_notimpl: return ("NOTIMPL");
885 case ns_r_refused: return ("REFUSED");
886 case ns_r_yxdomain: return ("YXDOMAIN");
887 case ns_r_yxrrset: return ("YXRRSET");
888 case ns_r_nxrrset: return ("NXRRSET");
889 case ns_r_notauth: return ("NOTAUTH");
890 case ns_r_notzone: return ("NOTZONE");
891 case ns_r_max: return ("MAX");
892 case ns_r_badsig: return ("BADSIG");
893 case ns_r_badkey: return ("BADKEY");
894 case ns_r_badtime: return ("BADTIME");
895 /* #endif __NAMESER >= 19991006 */
896 #elif (defined (__BIND)) && (__BIND >= 19950621)
897 case NOERROR: return ("NOERROR");
898 case FORMERR: return ("FORMERR");
899 case SERVFAIL: return ("SERVFAIL");
900 case NXDOMAIN: return ("NXDOMAIN");
901 case NOTIMP: return ("NOTIMP");
902 case REFUSED: return ("REFUSED");
903 #if defined (YXDOMAIN) && defined (NXRRSET)
904 case YXDOMAIN: return ("YXDOMAIN");
905 case YXRRSET: return ("YXRRSET");
906 case NXRRSET: return ("NXRRSET");
907 case NOTAUTH: return ("NOTAUTH");
908 case NOTZONE: return ("NOTZONE");
909 #endif /* RFC2136 rcodes */
910 #endif /* __BIND >= 19950621 */
912 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
917 } /* const char *rcode_str (int rcode) */
921 main(int argc, char *argv[])
923 char errbuf[PCAP_ERRBUF_SIZE];
926 int readfile_state = 0;
927 struct bpf_program fp;
930 SubReport = Sources_report;
931 ignore_addr.s_addr = 0;
932 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
936 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
951 bpf_program_str = strdup(optarg);
954 ignore_addr.s_addr = inet_addr(optarg);
969 device = strdup(argv[0]);
971 if (0 == stat(device, &sb))
973 if (readfile_state) {
974 pcap_obj = pcap_open_offline(device, errbuf);
976 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
978 if (NULL == pcap_obj) {
979 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
983 if (0 == isatty(1)) {
984 if (0 == readfile_state) {
985 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
992 memset(&fp, '\0', sizeof(fp));
993 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
995 fprintf(stderr, "pcap_compile failed\n");
998 x = pcap_setfilter(pcap_obj, &fp);
1000 fprintf(stderr, "pcap_setfilter failed\n");
1005 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
1006 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
1008 x = pcap_setnonblock(pcap_obj, 1, errbuf);
1010 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
1014 switch (pcap_datalink(pcap_obj)) {
1016 handle_datalink = handle_ether;
1018 #if HAVE_NET_IF_PPP_H
1020 handle_datalink = handle_ppp;
1025 handle_datalink = handle_loop;
1030 handle_datalink = handle_raw;
1034 handle_datalink = handle_null;
1037 fprintf(stderr, "unsupported data link type %d\n",
1038 pcap_datalink(pcap_obj));
1045 if (readfile_state < 2) {
1047 * On some OSes select() might return 0 even when
1048 * there are packets to process. Thus, we always
1049 * ignore its return value and just call pcap_dispatch()
1052 if (0 == readfile_state) /* interactive */
1053 pcap_select(pcap_obj, 1, 0);
1054 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1056 if (0 == x && 1 == readfile_state) {
1057 /* block on keyboard until user quits */
1066 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1068 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1071 Sources_report(); print_func("\n");
1072 Destinatioreport(); print_func("\n");
1073 Qtypes_report(); print_func("\n");
1074 Opcodes_report(); print_func("\n");
1075 Tld_report(); print_func("\n");
1076 Sld_report(); print_func("\n");
1077 Nld_report(); print_func("\n");
1078 SldBySource_report();
1081 pcap_close(pcap_obj);
1083 } /* static int main(int argc, char *argv[]) */
1086 * vim:shiftwidth=4:tabstop=8:softtabstop=4