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>
36 #define _DEFAULT_SOURCE
45 # include <net/if_arp.h>
50 #if HAVE_NET_PPP_DEFS_H
51 # include <net/ppp_defs.h>
54 # include <net/if_ppp.h>
57 #if HAVE_NETINET_IN_SYSTM_H
58 # include <netinet/in_systm.h>
61 # include <netinet/in.h>
63 #if HAVE_NETINET_IP6_H
64 # include <netinet/ip6.h>
66 #if HAVE_NETINET_IF_ETHER_H
67 # include <netinet/if_ether.h>
70 # include <netinet/ip.h>
72 #ifdef HAVE_NETINET_IP_VAR_H
73 # include <netinet/ip_var.h>
75 #if HAVE_NETINET_UDP_H
76 # include <netinet/udp.h>
80 # include <arpa/inet.h>
82 #if HAVE_ARPA_NAMESER_H
83 # include <arpa/nameser.h>
85 #if HAVE_ARPA_NAMESER_COMPAT_H
86 # include <arpa/nameser_compat.h>
97 #define PCAP_SNAPLEN 1460
99 #define ETHER_ADDR_LEN 6
100 #define ETHER_TYPE_LEN 2
101 #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
103 #ifndef ETHERTYPE_8021Q
104 # define ETHERTYPE_8021Q 0x8100
106 #ifndef ETHERTYPE_IPV6
107 # define ETHERTYPE_IPV6 0x86DD
110 #ifndef PPP_ADDRESS_VAL
111 # define PPP_ADDRESS_VAL 0xff /* The address byte value */
113 #ifndef PPP_CONTROL_VAL
114 # define PPP_CONTROL_VAL 0x03 /* The control byte value */
117 #if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
118 # define UDP_DEST uh_dport
119 # define UDP_SRC uh_sport
120 #elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
121 # define UDP_DEST dest
122 # define UDP_SRC source
124 # error "`struct udphdr' is unusable."
127 #if HAVE_NETINET_IP6_H && HAVE_STRUCT_IP6_EXT
131 #include "utils_dns.h"
138 struct in6_addr addr;
140 struct ip_list_s *next;
142 typedef struct ip_list_s ip_list_t;
144 typedef int (printer)(const char *, ...);
147 * flags/features for non-interactive mode
162 static pcap_t *pcap_obj = NULL;
165 static ip_list_t *IgnoreList = NULL;
168 static void (*Callback) (const rfc1035_header_t *) = NULL;
170 static int query_count_intvl = 0;
171 static int query_count_total = 0;
173 static struct bpf_timeval last_ts;
175 static struct timeval last_ts;
176 # endif /* __OpenBSD__ */
177 #endif /* HAVE_PCAP_H */
179 static int cmp_in6_addr (const struct in6_addr *a,
180 const struct in6_addr *b)
184 assert (sizeof (struct in6_addr) == 16);
186 for (i = 0; i < 16; i++)
187 if (a->s6_addr[i] != b->s6_addr[i])
193 return (a->s6_addr[i] > b->s6_addr[i] ? 1 : -1);
194 } /* int cmp_addrinfo */
196 static inline int ignore_list_match (const struct in6_addr *addr)
200 for (ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
201 if (cmp_in6_addr (addr, &ptr->addr) == 0)
204 } /* int ignore_list_match */
206 static void ignore_list_add (const struct in6_addr *addr)
210 if (ignore_list_match (addr) != 0)
213 new = malloc (sizeof (*new));
220 memcpy (&new->addr, addr, sizeof (struct in6_addr));
221 new->next = IgnoreList;
224 } /* void ignore_list_add */
226 void ignore_list_add_name (const char *name)
228 struct addrinfo *ai_list;
229 struct addrinfo *ai_ptr;
230 struct in6_addr addr;
233 status = getaddrinfo (name, NULL, NULL, &ai_list);
237 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
239 if (ai_ptr->ai_family == AF_INET)
241 memset (&addr, '\0', sizeof (addr));
242 addr.s6_addr[10] = 0xFF;
243 addr.s6_addr[11] = 0xFF;
244 memcpy (addr.s6_addr + 12, &((struct sockaddr_in *) ai_ptr->ai_addr)->sin_addr, 4);
246 ignore_list_add (&addr);
250 ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
254 freeaddrinfo (ai_list);
258 static void in6_addr_from_buffer (struct in6_addr *ia,
259 const void *buf, size_t buf_len,
262 memset (ia, 0, sizeof (struct in6_addr));
263 if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
265 ia->s6_addr[10] = 0xFF;
266 ia->s6_addr[11] = 0xFF;
267 memcpy (ia->s6_addr + 12, buf, buf_len);
269 else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
271 memcpy (ia, buf, buf_len);
273 } /* void in6_addr_from_buffer */
275 void dnstop_set_pcap_obj (pcap_t *po)
280 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
285 #define RFC1035_MAXLABELSZ 63
287 rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns)
292 static int loop_detect = 0;
294 return 4; /* compression loop */
296 return 4; /* probably compression loop */
298 if ((*off) >= ((off_t) sz))
302 /* blasted compression */
306 memcpy(&s, buf + (*off), sizeof(s));
310 if ((*off) >= ((off_t) sz))
311 return 1; /* message too short */
313 /* Make sure the pointer is inside this message */
314 if (ptr >= ((off_t) sz))
315 return 2; /* bad compression ptr */
316 if (ptr < DNS_MSG_HDR_SZ)
317 return 2; /* bad compression ptr */
319 rc = rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
322 } else if (c > RFC1035_MAXLABELSZ) {
324 * "(The 10 and 01 combinations are reserved for future use.)"
326 return 3; /* reserved label/compression flags */
334 if ((*off) + len > sz)
335 return 4; /* message is too short */
336 if (no + len + 1 > ns)
337 return 5; /* qname would overflow name buffer */
338 memcpy(name + no, buf + (*off), len);
341 *(name + (no++)) = '.';
345 *(name + no - 1) = '\0';
346 /* make sure we didn't allow someone to overflow the name buffer */
347 assert(no <= ((off_t) ns));
352 handle_dns(const char *buf, int len)
360 /* The DNS header is 12 bytes long */
361 if (len < DNS_MSG_HDR_SZ)
364 memcpy(&us, buf + 0, 2);
367 memcpy(&us, buf + 2, 2);
369 qh.qr = (us >> 15) & 0x01;
370 qh.opcode = (us >> 11) & 0x0F;
371 qh.aa = (us >> 10) & 0x01;
372 qh.tc = (us >> 9) & 0x01;
373 qh.rd = (us >> 8) & 0x01;
374 qh.ra = (us >> 7) & 0x01;
375 qh.z = (us >> 6) & 0x01;
376 qh.ad = (us >> 5) & 0x01;
377 qh.cd = (us >> 4) & 0x01;
378 qh.rcode = us & 0x0F;
380 memcpy(&us, buf + 4, 2);
381 qh.qdcount = ntohs(us);
383 memcpy(&us, buf + 6, 2);
384 qh.ancount = ntohs(us);
386 memcpy(&us, buf + 8, 2);
387 qh.nscount = ntohs(us);
389 memcpy(&us, buf + 10, 2);
390 qh.arcount = ntohs(us);
392 offset = DNS_MSG_HDR_SZ;
393 memset(qh.qname, '\0', MAX_QNAME_SZ);
394 status = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
397 INFO ("utils_dns: handle_dns: rfc1035NameUnpack failed "
398 "with status %i.", status);
401 if ('\0' == qh.qname[0])
402 sstrncpy (qh.qname, ".", sizeof (qh.qname));
403 while ((t = strchr(qh.qname, '\n')))
405 while ((t = strchr(qh.qname, '\r')))
407 for (t = qh.qname; *t; t++)
408 *t = tolower((int) *t);
410 memcpy(&us, buf + offset, 2);
411 qh.qtype = ntohs(us);
412 memcpy(&us, buf + offset + 2, 2);
413 qh.qclass = ntohs(us);
415 qh.length = (uint16_t) len;
417 if (Callback != NULL)
424 handle_udp(const struct udphdr *udp, int len)
426 char buf[PCAP_SNAPLEN];
427 if ((ntohs (udp->UDP_DEST) != 53)
428 && (ntohs (udp->UDP_SRC) != 53))
430 memcpy(buf, udp + 1, len - sizeof(*udp));
431 if (0 == handle_dns(buf, len - sizeof(*udp)))
438 handle_ipv6 (struct ip6_hdr *ipv6, int len)
440 char buf[PCAP_SNAPLEN];
444 struct in6_addr c_src_addr;
445 uint16_t payload_len;
450 offset = sizeof (struct ip6_hdr);
451 nexthdr = ipv6->ip6_nxt;
452 c_src_addr = ipv6->ip6_src;
453 payload_len = ntohs (ipv6->ip6_plen);
455 if (ignore_list_match (&c_src_addr))
458 /* Parse extension headers. This only handles the standard headers, as
459 * defined in RFC 2460, correctly. Fragments are discarded. */
460 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
461 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
462 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
463 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
464 || (IPPROTO_AH == nexthdr) /* destination options. */
465 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
467 struct ip6_ext ext_hdr;
468 uint16_t ext_hdr_len;
470 /* Catch broken packets */
471 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
474 /* Cannot handle fragments. */
475 if (IPPROTO_FRAGMENT == nexthdr)
478 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
479 nexthdr = ext_hdr.ip6e_nxt;
480 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
482 /* This header is longer than the packets payload.. WTF? */
483 if (ext_hdr_len > payload_len)
486 offset += ext_hdr_len;
487 payload_len -= ext_hdr_len;
490 /* Catch broken and empty packets */
491 if (((offset + payload_len) > (unsigned int)len)
492 || (payload_len == 0)
493 || (payload_len > PCAP_SNAPLEN))
496 if (IPPROTO_UDP != nexthdr)
499 memcpy (buf, (char *) ipv6 + offset, payload_len);
500 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
503 return (1); /* Success */
504 } /* int handle_ipv6 */
505 /* #endif HAVE_IPV6 */
507 #else /* if !HAVE_IPV6 */
509 handle_ipv6 (__attribute__((unused)) void *pkg,
510 __attribute__((unused)) int len)
514 #endif /* !HAVE_IPV6 */
517 handle_ip(const struct ip *ip, int len)
519 char buf[PCAP_SNAPLEN];
520 int offset = ip->ip_hl << 2;
521 struct in6_addr c_src_addr;
522 struct in6_addr c_dst_addr;
525 return (handle_ipv6 ((void *) ip, len));
527 in6_addr_from_buffer (&c_src_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
528 in6_addr_from_buffer (&c_dst_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
529 if (ignore_list_match (&c_src_addr))
531 if (IPPROTO_UDP != ip->ip_p)
533 memcpy(buf, (void *) ip + offset, len - offset);
534 if (0 == handle_udp((struct udphdr *) buf, len - offset))
539 #if HAVE_NET_IF_PPP_H
541 handle_ppp(const u_char * pkt, int len)
543 char buf[PCAP_SNAPLEN];
545 unsigned short proto;
548 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
549 pkt += 2; /* ACFC not used */
555 proto = *pkt; /* PFC is used */
559 memcpy(&us, pkt, sizeof(us));
564 if (ETHERTYPE_IP != proto && PPP_IP != proto)
566 memcpy(buf, pkt, len);
567 return handle_ip((struct ip *) buf, len);
569 #endif /* HAVE_NET_IF_PPP_H */
572 handle_null(const u_char * pkt, int len)
575 memcpy(&family, pkt, sizeof(family));
576 if (AF_INET != family)
578 return handle_ip((struct ip *) (pkt + 4), len - 4);
583 handle_loop(const u_char * pkt, int len)
586 memcpy(&family, pkt, sizeof(family));
587 if (AF_INET != ntohl(family))
589 return handle_ip((struct ip *) (pkt + 4), len - 4);
596 handle_raw(const u_char * pkt, int len)
598 return handle_ip((struct ip *) pkt, len);
604 handle_ether(const u_char * pkt, int len)
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)
611 pkt += ETHER_HDR_LEN;
612 len -= ETHER_HDR_LEN;
613 if (ETHERTYPE_8021Q == etype) {
614 etype = ntohs(*(unsigned short *) (pkt + 2));
618 if ((ETHERTYPE_IP != etype)
619 && (ETHERTYPE_IPV6 != etype))
621 memcpy(buf, pkt, len);
622 if (ETHERTYPE_IPV6 == etype)
623 return (handle_ipv6 ((void *) buf, len));
625 return handle_ip((struct ip *) buf, len);
630 handle_linux_sll (const u_char *pkt, int len)
642 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
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))
655 if (ETHERTYPE_IPV6 == etype)
656 return (handle_ipv6 ((void *) pkt, len));
658 return handle_ip((struct ip *) pkt, len);
660 #endif /* DLT_LINUX_SLL */
662 /* public function */
663 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
667 if (hdr->caplen < ETHER_HDR_LEN)
670 switch (pcap_datalink (pcap_obj))
673 status = handle_ether (pkt, hdr->caplen);
675 #if HAVE_NET_IF_PPP_H
677 status = handle_ppp (pkt, hdr->caplen);
682 status = handle_loop (pkt, hdr->caplen);
687 status = handle_raw (pkt, hdr->caplen);
692 status = handle_linux_sll (pkt, hdr->caplen);
696 status = handle_null (pkt, hdr->caplen);
700 ERROR ("handle_pcap: unsupported data link type %d",
701 pcap_datalink(pcap_obj));
704 } /* switch (pcap_datalink(pcap_obj)) */
713 #endif /* HAVE_PCAP_H */
715 const char *qtype_str(int 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");
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 */
830 ssnprintf (buf, sizeof (buf), "#%i", t);
835 const char *opcode_str (int o)
850 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
855 const char *rcode_str (int rcode)
860 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
861 case ns_r_noerror: return ("NOERROR");
862 case ns_r_formerr: return ("FORMERR");
863 case ns_r_servfail: return ("SERVFAIL");
864 case ns_r_nxdomain: return ("NXDOMAIN");
865 case ns_r_notimpl: return ("NOTIMPL");
866 case ns_r_refused: return ("REFUSED");
867 case ns_r_yxdomain: return ("YXDOMAIN");
868 case ns_r_yxrrset: return ("YXRRSET");
869 case ns_r_nxrrset: return ("NXRRSET");
870 case ns_r_notauth: return ("NOTAUTH");
871 case ns_r_notzone: return ("NOTZONE");
872 case ns_r_max: return ("MAX");
873 case ns_r_badsig: return ("BADSIG");
874 case ns_r_badkey: return ("BADKEY");
875 case ns_r_badtime: return ("BADTIME");
876 /* #endif __NAMESER >= 19991006 */
877 #elif (defined (__BIND)) && (__BIND >= 19950621)
878 case NOERROR: return ("NOERROR");
879 case FORMERR: return ("FORMERR");
880 case SERVFAIL: return ("SERVFAIL");
881 case NXDOMAIN: return ("NXDOMAIN");
882 case NOTIMP: return ("NOTIMP");
883 case REFUSED: return ("REFUSED");
884 #if defined (YXDOMAIN) && defined (NXRRSET)
885 case YXDOMAIN: return ("YXDOMAIN");
886 case YXRRSET: return ("YXRRSET");
887 case NXRRSET: return ("NXRRSET");
888 case NOTAUTH: return ("NOTAUTH");
889 case NOTZONE: return ("NOTZONE");
890 #endif /* RFC2136 rcodes */
891 #endif /* __BIND >= 19950621 */
893 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
896 } /* const char *rcode_str (int rcode) */
900 main(int argc, char *argv[])
902 char errbuf[PCAP_ERRBUF_SIZE];
905 int readfile_state = 0;
906 struct bpf_program fp;
909 SubReport = Sources_report;
910 ignore_addr.s_addr = 0;
911 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
915 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
930 bpf_program_str = strdup(optarg);
933 ignore_addr.s_addr = inet_addr(optarg);
948 device = strdup(argv[0]);
950 if (0 == stat(device, &sb))
952 if (readfile_state) {
953 pcap_obj = pcap_open_offline(device, errbuf);
955 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
957 if (NULL == pcap_obj) {
958 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
962 if (0 == isatty(1)) {
963 if (0 == readfile_state) {
964 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
971 memset(&fp, '\0', sizeof(fp));
972 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
974 fprintf(stderr, "pcap_compile failed\n");
977 x = pcap_setfilter(pcap_obj, &fp);
979 fprintf(stderr, "pcap_setfilter failed\n");
984 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
985 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
987 x = pcap_setnonblock(pcap_obj, 1, errbuf);
989 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
993 switch (pcap_datalink(pcap_obj)) {
995 handle_datalink = handle_ether;
997 #if HAVE_NET_IF_PPP_H
999 handle_datalink = handle_ppp;
1004 handle_datalink = handle_loop;
1009 handle_datalink = handle_raw;
1013 handle_datalink = handle_null;
1016 fprintf(stderr, "unsupported data link type %d\n",
1017 pcap_datalink(pcap_obj));
1024 if (readfile_state < 2) {
1026 * On some OSes select() might return 0 even when
1027 * there are packets to process. Thus, we always
1028 * ignore its return value and just call pcap_dispatch()
1031 if (0 == readfile_state) /* interactive */
1032 pcap_select(pcap_obj, 1, 0);
1033 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1035 if (0 == x && 1 == readfile_state) {
1036 /* block on keyboard until user quits */
1045 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1047 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1050 Sources_report(); print_func("\n");
1051 Destinatioreport(); print_func("\n");
1052 Qtypes_report(); print_func("\n");
1053 Opcodes_report(); print_func("\n");
1054 Tld_report(); print_func("\n");
1055 Sld_report(); print_func("\n");
1056 Nld_report(); print_func("\n");
1057 SldBySource_report();
1060 pcap_close(pcap_obj);
1062 } /* static int main(int argc, char *argv[]) */
1065 * vim:shiftwidth=4:tabstop=8:softtabstop=4