2 * collectd - src/utils_dns.c
3 * Modifications 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 verplant.org>
42 #if HAVE_NETINET_IN_SYSTM_H
43 # include <netinet/in_systm.h>
46 # include <netinet/in.h>
49 # include <arpa/inet.h>
52 # include <sys/socket.h>
55 #if HAVE_ARPA_NAMESER_H
56 # include <arpa/nameser.h>
58 #if HAVE_ARPA_NAMESER_COMPAT_H
59 # include <arpa/nameser_compat.h>
63 # include <net/if_arp.h>
68 #if HAVE_NETINET_IF_ETHER_H
69 # include <netinet/if_ether.h>
71 #if HAVE_NET_PPP_DEFS_H
72 # include <net/ppp_defs.h>
75 # include <net/if_ppp.h>
83 # include <netinet/ip.h>
85 #ifdef HAVE_NETINET_IP_VAR_H
86 # include <netinet/ip_var.h>
88 #if HAVE_NETINET_IP6_H
89 # include <netinet/ip6.h>
91 #if HAVE_NETINET_UDP_H
92 # include <netinet/udp.h>
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)
105 #ifndef ETHERTYPE_8021Q
106 # define ETHERTYPE_8021Q 0x8100
108 #ifndef ETHERTYPE_IPV6
109 # define ETHERTYPE_IPV6 0x86DD
112 #ifndef PPP_ADDRESS_VAL
113 # define PPP_ADDRESS_VAL 0xff /* The address byte value */
115 #ifndef PPP_CONTROL_VAL
116 # define PPP_CONTROL_VAL 0x03 /* The control byte value */
119 #if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
120 # define UDP_DEST uh_dport
121 # define UDP_SRC uh_sport
122 #elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
123 # define UDP_DEST dest
124 # define UDP_SRC source
126 # error "`struct udphdr' is unusable."
129 #include "utils_dns.h"
136 struct in6_addr addr;
138 struct ip_list_s *next;
140 typedef struct ip_list_s ip_list_t;
142 typedef int (printer)(const char *, ...);
145 * flags/features for non-interactive mode
158 int qtype_counts[T_MAX];
159 int opcode_counts[OP_MAX];
160 int qclass_counts[C_MAX];
163 static pcap_t *pcap_obj = NULL;
166 static ip_list_t *IgnoreList = NULL;
169 static void (*Callback) (const rfc1035_header_t *) = NULL;
171 static int query_count_intvl = 0;
172 static int query_count_total = 0;
174 static struct bpf_timeval last_ts;
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)
185 assert (sizeof (struct in6_addr) == 16);
187 for (i = 0; i < 16; i++)
188 if (a->s6_addr[i] != b->s6_addr[i])
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)
201 for (ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
202 if (cmp_in6_addr (addr, &ptr->addr) == 0)
205 } /* int ignore_list_match */
207 static void ignore_list_add (const struct in6_addr *addr)
211 if (ignore_list_match (addr) != 0)
214 new = malloc (sizeof (ip_list_t));
221 memcpy (&new->addr, addr, sizeof (struct in6_addr));
222 new->next = IgnoreList;
225 } /* void ignore_list_add */
227 void ignore_list_add_name (const char *name)
229 struct addrinfo *ai_list;
230 struct addrinfo *ai_ptr;
231 struct in6_addr addr;
234 status = getaddrinfo (name, NULL, NULL, &ai_list);
238 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
240 if (ai_ptr->ai_family == AF_INET)
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);
251 ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
255 freeaddrinfo (ai_list);
259 static void in6_addr_from_buffer (struct in6_addr *ia,
260 const void *buf, size_t buf_len,
263 memset (ia, 0, sizeof (struct in6_addr));
264 if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
266 ia->s6_addr[10] = 0xFF;
267 ia->s6_addr[11] = 0xFF;
268 memcpy (ia->s6_addr + 12, buf, buf_len);
270 else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
272 memcpy (ia, buf, buf_len);
274 } /* void in6_addr_from_buffer */
276 void dnstop_set_pcap_obj (pcap_t *po)
281 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
286 #define RFC1035_MAXLABELSZ 63
288 rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns
300 /* blasted compression */
303 memcpy(&s, buf + (*off), sizeof(s));
310 /* Make sure the pointer is inside this message */
313 return rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
314 } else if (c > RFC1035_MAXLABELSZ) {
316 * "(The 10 and 01 combinations are reserved for future use.)"
327 if ((*off) + len > sz) /* message is too short */
329 memcpy(name + no, buf + (*off), len);
332 *(name + (no++)) = '.';
335 *(name + no - 1) = '\0';
336 /* make sure we didn't allow someone to overflow the name buffer */
342 handle_dns(const char *buf, int len)
350 /* The DNS header is 12 bytes long */
354 memcpy(&us, buf + 0, 2);
357 memcpy(&us, buf + 2, 2);
359 qh.qr = (us >> 15) & 0x01;
360 qh.opcode = (us >> 11) & 0x0F;
361 qh.aa = (us >> 10) & 0x01;
362 qh.tc = (us >> 9) & 0x01;
363 qh.rd = (us >> 8) & 0x01;
364 qh.ra = (us >> 7) & 0x01;
365 qh.z = (us >> 6) & 0x01;
366 qh.ad = (us >> 5) & 0x01;
367 qh.cd = (us >> 4) & 0x01;
368 qh.rcode = us & 0x0F;
370 memcpy(&us, buf + 4, 2);
371 qh.qdcount = ntohs(us);
373 memcpy(&us, buf + 6, 2);
374 qh.ancount = ntohs(us);
376 memcpy(&us, buf + 8, 2);
377 qh.nscount = ntohs(us);
379 memcpy(&us, buf + 10, 2);
380 qh.arcount = ntohs(us);
383 memset(qh.qname, '\0', MAX_QNAME_SZ);
384 x = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
387 if ('\0' == qh.qname[0])
388 sstrncpy (qh.qname, ".", sizeof (qh.qname));
389 while ((t = strchr(qh.qname, '\n')))
391 while ((t = strchr(qh.qname, '\r')))
393 for (t = qh.qname; *t; t++)
394 *t = tolower((int) *t);
396 memcpy(&us, buf + offset, 2);
397 qh.qtype = ntohs(us);
398 memcpy(&us, buf + offset + 2, 2);
399 qh.qclass = ntohs(us);
401 qh.length = (uint16_t) len;
404 qtype_counts[qh.qtype]++;
405 qclass_counts[qh.qclass]++;
406 opcode_counts[qh.opcode]++;
408 if (Callback != NULL)
415 handle_udp(const struct udphdr *udp, int len)
417 char buf[PCAP_SNAPLEN];
418 if ((ntohs (udp->UDP_DEST) != 53)
419 && (ntohs (udp->UDP_SRC) != 53))
421 memcpy(buf, udp + 1, len - sizeof(*udp));
422 if (0 == handle_dns(buf, len - sizeof(*udp)))
428 handle_ipv6 (struct ip6_hdr *ipv6, int len)
430 char buf[PCAP_SNAPLEN];
434 struct in6_addr c_src_addr;
435 uint16_t payload_len;
440 offset = sizeof (struct ip6_hdr);
441 nexthdr = ipv6->ip6_nxt;
442 c_src_addr = ipv6->ip6_src;
443 payload_len = ntohs (ipv6->ip6_plen);
445 if (ignore_list_match (&c_src_addr))
448 /* Parse extension headers. This only handles the standard headers, as
449 * defined in RFC 2460, correctly. Fragments are discarded. */
450 while ((IPPROTO_ROUTING == nexthdr) /* routing header */
451 || (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
452 || (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
453 || (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
454 || (IPPROTO_AH == nexthdr) /* destination options. */
455 || (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
457 struct ip6_ext ext_hdr;
458 uint16_t ext_hdr_len;
460 /* Catch broken packets */
461 if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
464 /* Cannot handle fragments. */
465 if (IPPROTO_FRAGMENT == nexthdr)
468 memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
469 nexthdr = ext_hdr.ip6e_nxt;
470 ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
472 /* This header is longer than the packets payload.. WTF? */
473 if (ext_hdr_len > payload_len)
476 offset += ext_hdr_len;
477 payload_len -= ext_hdr_len;
480 /* Catch broken and empty packets */
481 if (((offset + payload_len) > (unsigned int)len)
482 || (payload_len == 0)
483 || (payload_len > PCAP_SNAPLEN))
486 if (IPPROTO_UDP != nexthdr)
489 memcpy (buf, (char *) ipv6 + offset, payload_len);
490 if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
493 return (1); /* Success */
494 } /* int handle_ipv6 */
497 handle_ip(const struct ip *ip, int len)
499 char buf[PCAP_SNAPLEN];
500 int offset = ip->ip_hl << 2;
501 struct in6_addr c_src_addr;
502 struct in6_addr c_dst_addr;
505 return (handle_ipv6 ((struct ip6_hdr *) ip, len));
507 in6_addr_from_buffer (&c_src_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
508 in6_addr_from_buffer (&c_dst_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
509 if (ignore_list_match (&c_src_addr))
511 if (IPPROTO_UDP != ip->ip_p)
513 memcpy(buf, (void *) ip + offset, len - offset);
514 if (0 == handle_udp((struct udphdr *) buf, len - offset))
519 #if HAVE_NET_IF_PPP_H
521 handle_ppp(const u_char * pkt, int len)
523 char buf[PCAP_SNAPLEN];
525 unsigned short proto;
528 if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
529 pkt += 2; /* ACFC not used */
535 proto = *pkt; /* PFC is used */
539 memcpy(&us, pkt, sizeof(us));
544 if (ETHERTYPE_IP != proto && PPP_IP != proto)
546 memcpy(buf, pkt, len);
547 return handle_ip((struct ip *) buf, len);
549 #endif /* HAVE_NET_IF_PPP_H */
552 handle_null(const u_char * pkt, int len)
555 memcpy(&family, pkt, sizeof(family));
556 if (AF_INET != family)
558 return handle_ip((struct ip *) (pkt + 4), len - 4);
563 handle_loop(const u_char * pkt, int len)
566 memcpy(&family, pkt, sizeof(family));
567 if (AF_INET != ntohl(family))
569 return handle_ip((struct ip *) (pkt + 4), len - 4);
576 handle_raw(const u_char * pkt, int len)
578 return handle_ip((struct ip *) pkt, len);
584 handle_ether(const u_char * pkt, int len)
586 char buf[PCAP_SNAPLEN];
587 struct ether_header *e = (void *) pkt;
588 unsigned short etype = ntohs(e->ether_type);
589 if (len < ETHER_HDR_LEN)
591 pkt += ETHER_HDR_LEN;
592 len -= ETHER_HDR_LEN;
593 if (ETHERTYPE_8021Q == etype) {
594 etype = ntohs(*(unsigned short *) (pkt + 2));
598 if ((ETHERTYPE_IP != etype)
599 && (ETHERTYPE_IPV6 != etype))
601 memcpy(buf, pkt, len);
602 if (ETHERTYPE_IPV6 == etype)
603 return (handle_ipv6 ((struct ip6_hdr *) buf, len));
605 return handle_ip((struct ip *) buf, len);
610 handle_linux_sll (const u_char *pkt, int len)
622 if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
625 hdr = (struct sll_header *) pkt;
626 pkt = (u_char *) (hdr + 1);
627 len -= sizeof (struct sll_header);
629 etype = ntohs (hdr->proto_type);
631 if ((ETHERTYPE_IP != etype)
632 && (ETHERTYPE_IPV6 != etype))
635 if (ETHERTYPE_IPV6 == etype)
636 return (handle_ipv6 ((struct ip6_hdr *) pkt, len));
638 return handle_ip((struct ip *) pkt, len);
640 #endif /* DLT_LINUX_SLL */
642 /* public function */
643 void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
647 DEBUG ("handle_pcap (udata = %p, hdr = %p, pkt = %p): hdr->caplen = %i\n",
648 (void *) udata, (void *) hdr, (void *) pkt,
651 if (hdr->caplen < ETHER_HDR_LEN)
654 switch (pcap_datalink (pcap_obj))
657 status = handle_ether (pkt, hdr->caplen);
659 #if HAVE_NET_IF_PPP_H
661 status = handle_ppp (pkt, hdr->caplen);
666 status = handle_loop (pkt, hdr->caplen);
671 status = handle_raw (pkt, hdr->caplen);
676 status = handle_linux_sll (pkt, hdr->caplen);
680 status = handle_null (pkt, hdr->caplen);
684 ERROR ("handle_pcap: unsupported data link type %d\n",
685 pcap_datalink(pcap_obj));
688 } /* switch (pcap_datalink(pcap_obj)) */
697 #endif /* HAVE_PCAP_H */
699 const char *qtype_str(int t)
703 #if (defined (__NAMESER)) && (__NAMESER >= 19991001)
704 case ns_t_a: return ("A");
705 case ns_t_ns: return ("NS");
706 case ns_t_md: return ("MD");
707 case ns_t_mf: return ("MF");
708 case ns_t_cname: return ("CNAME");
709 case ns_t_soa: return ("SOA");
710 case ns_t_mb: return ("MB");
711 case ns_t_mg: return ("MG");
712 case ns_t_mr: return ("MR");
713 case ns_t_null: return ("NULL");
714 case ns_t_wks: return ("WKS");
715 case ns_t_ptr: return ("PTR");
716 case ns_t_hinfo: return ("HINFO");
717 case ns_t_minfo: return ("MINFO");
718 case ns_t_mx: return ("MX");
719 case ns_t_txt: return ("TXT");
720 case ns_t_rp: return ("RP");
721 case ns_t_afsdb: return ("AFSDB");
722 case ns_t_x25: return ("X25");
723 case ns_t_isdn: return ("ISDN");
724 case ns_t_rt: return ("RT");
725 case ns_t_nsap: return ("NSAP");
726 case ns_t_nsap_ptr: return ("NSAP-PTR");
727 case ns_t_sig: return ("SIG");
728 case ns_t_key: return ("KEY");
729 case ns_t_px: return ("PX");
730 case ns_t_gpos: return ("GPOS");
731 case ns_t_aaaa: return ("AAAA");
732 case ns_t_loc: return ("LOC");
733 case ns_t_nxt: return ("NXT");
734 case ns_t_eid: return ("EID");
735 case ns_t_nimloc: return ("NIMLOC");
736 case ns_t_srv: return ("SRV");
737 case ns_t_atma: return ("ATMA");
738 case ns_t_naptr: return ("NAPTR");
739 case ns_t_kx: return ("KX");
740 case ns_t_cert: return ("CERT");
741 case ns_t_a6: return ("A6");
742 case ns_t_dname: return ("DNAME");
743 case ns_t_sink: return ("SINK");
744 case ns_t_opt: return ("OPT");
745 # if __NAMESER >= 19991006
746 case ns_t_tsig: return ("TSIG");
748 case ns_t_ixfr: return ("IXFR");
749 case ns_t_axfr: return ("AXFR");
750 case ns_t_mailb: return ("MAILB");
751 case ns_t_maila: return ("MAILA");
752 case ns_t_any: return ("ANY");
753 case ns_t_zxfr: return ("ZXFR");
754 /* #endif __NAMESER >= 19991006 */
755 #elif (defined (__BIND)) && (__BIND >= 19950621)
756 case T_A: return ("A"); /* 1 ... */
757 case T_NS: return ("NS");
758 case T_MD: return ("MD");
759 case T_MF: return ("MF");
760 case T_CNAME: return ("CNAME");
761 case T_SOA: return ("SOA");
762 case T_MB: return ("MB");
763 case T_MG: return ("MG");
764 case T_MR: return ("MR");
765 case T_NULL: return ("NULL");
766 case T_WKS: return ("WKS");
767 case T_PTR: return ("PTR");
768 case T_HINFO: return ("HINFO");
769 case T_MINFO: return ("MINFO");
770 case T_MX: return ("MX");
771 case T_TXT: return ("TXT");
772 case T_RP: return ("RP");
773 case T_AFSDB: return ("AFSDB");
774 case T_X25: return ("X25");
775 case T_ISDN: return ("ISDN");
776 case T_RT: return ("RT");
777 case T_NSAP: return ("NSAP");
778 case T_NSAP_PTR: return ("NSAP_PTR");
779 case T_SIG: return ("SIG");
780 case T_KEY: return ("KEY");
781 case T_PX: return ("PX");
782 case T_GPOS: return ("GPOS");
783 case T_AAAA: return ("AAAA");
784 case T_LOC: return ("LOC");
785 case T_NXT: return ("NXT");
786 case T_EID: return ("EID");
787 case T_NIMLOC: return ("NIMLOC");
788 case T_SRV: return ("SRV");
789 case T_ATMA: return ("ATMA");
790 case T_NAPTR: return ("NAPTR"); /* ... 35 */
791 #if (__BIND >= 19960801)
792 case T_KX: return ("KX"); /* 36 ... */
793 case T_CERT: return ("CERT");
794 case T_A6: return ("A6");
795 case T_DNAME: return ("DNAME");
796 case T_SINK: return ("SINK");
797 case T_OPT: return ("OPT");
798 case T_APL: return ("APL");
799 case T_DS: return ("DS");
800 case T_SSHFP: return ("SSHFP");
801 case T_RRSIG: return ("RRSIG");
802 case T_NSEC: return ("NSEC");
803 case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
804 case T_TKEY: return ("TKEY"); /* 249 */
805 #endif /* __BIND >= 19960801 */
806 case T_TSIG: return ("TSIG"); /* 250 ... */
807 case T_IXFR: return ("IXFR");
808 case T_AXFR: return ("AXFR");
809 case T_MAILB: return ("MAILB");
810 case T_MAILA: return ("MAILA");
811 case T_ANY: return ("ANY"); /* ... 255 */
812 #endif /* __BIND >= 19950621 */
814 ssnprintf (buf, sizeof (buf), "#%i", t);
821 const char *opcode_str (int o)
841 ssnprintf(buf, sizeof (buf), "Opcode%d", o);
847 const char *rcode_str (int rcode)
852 #if (defined (__NAMESER)) && (__NAMESER >= 19991006)
853 case ns_r_noerror: return ("NOERROR");
854 case ns_r_formerr: return ("FORMERR");
855 case ns_r_servfail: return ("SERVFAIL");
856 case ns_r_nxdomain: return ("NXDOMAIN");
857 case ns_r_notimpl: return ("NOTIMPL");
858 case ns_r_refused: return ("REFUSED");
859 case ns_r_yxdomain: return ("YXDOMAIN");
860 case ns_r_yxrrset: return ("YXRRSET");
861 case ns_r_nxrrset: return ("NXRRSET");
862 case ns_r_notauth: return ("NOTAUTH");
863 case ns_r_notzone: return ("NOTZONE");
864 case ns_r_max: return ("MAX");
865 case ns_r_badsig: return ("BADSIG");
866 case ns_r_badkey: return ("BADKEY");
867 case ns_r_badtime: return ("BADTIME");
868 /* #endif __NAMESER >= 19991006 */
869 #elif (defined (__BIND)) && (__BIND >= 19950621)
870 case NOERROR: return ("NOERROR");
871 case FORMERR: return ("FORMERR");
872 case SERVFAIL: return ("SERVFAIL");
873 case NXDOMAIN: return ("NXDOMAIN");
874 case NOTIMP: return ("NOTIMP");
875 case REFUSED: return ("REFUSED");
876 #if defined (YXDOMAIN) && defined (NXRRSET)
877 case YXDOMAIN: return ("YXDOMAIN");
878 case YXRRSET: return ("YXRRSET");
879 case NXRRSET: return ("NXRRSET");
880 case NOTAUTH: return ("NOTAUTH");
881 case NOTZONE: return ("NOTZONE");
882 #endif /* RFC2136 rcodes */
883 #endif /* __BIND >= 19950621 */
885 ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
890 } /* const char *rcode_str (int rcode) */
894 main(int argc, char *argv[])
896 char errbuf[PCAP_ERRBUF_SIZE];
899 int readfile_state = 0;
900 struct bpf_program fp;
903 SubReport = Sources_report;
904 ignore_addr.s_addr = 0;
905 progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
909 while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
924 bpf_program_str = strdup(optarg);
927 ignore_addr.s_addr = inet_addr(optarg);
942 device = strdup(argv[0]);
944 if (0 == stat(device, &sb))
946 if (readfile_state) {
947 pcap_obj = pcap_open_offline(device, errbuf);
949 pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
951 if (NULL == pcap_obj) {
952 fprintf(stderr, "pcap_open_*: %s\n", errbuf);
956 if (0 == isatty(1)) {
957 if (0 == readfile_state) {
958 fprintf(stderr, "Non-interactive mode requires savefile argument\n");
965 memset(&fp, '\0', sizeof(fp));
966 x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
968 fprintf(stderr, "pcap_compile failed\n");
971 x = pcap_setfilter(pcap_obj, &fp);
973 fprintf(stderr, "pcap_setfilter failed\n");
978 * non-blocking call added for Mac OS X bugfix. Sent by Max Horn.
979 * ref http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
981 x = pcap_setnonblock(pcap_obj, 1, errbuf);
983 fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
987 switch (pcap_datalink(pcap_obj)) {
989 handle_datalink = handle_ether;
991 #if HAVE_NET_IF_PPP_H
993 handle_datalink = handle_ppp;
998 handle_datalink = handle_loop;
1003 handle_datalink = handle_raw;
1007 handle_datalink = handle_null;
1010 fprintf(stderr, "unsupported data link type %d\n",
1011 pcap_datalink(pcap_obj));
1018 if (readfile_state < 2) {
1020 * On some OSes select() might return 0 even when
1021 * there are packets to process. Thus, we always
1022 * ignore its return value and just call pcap_dispatch()
1025 if (0 == readfile_state) /* interactive */
1026 pcap_select(pcap_obj, 1, 0);
1027 x = pcap_dispatch(pcap_obj, 50, handle_pcap, NULL);
1029 if (0 == x && 1 == readfile_state) {
1030 /* block on keyboard until user quits */
1039 endwin(); /* klin, Thu Nov 28 08:56:51 2002 */
1041 while (pcap_dispatch(pcap_obj, 50, handle_pcap, NULL))
1044 Sources_report(); print_func("\n");
1045 Destinatioreport(); print_func("\n");
1046 Qtypes_report(); print_func("\n");
1047 Opcodes_report(); print_func("\n");
1048 Tld_report(); print_func("\n");
1049 Sld_report(); print_func("\n");
1050 Nld_report(); print_func("\n");
1051 SldBySource_report();
1054 pcap_close(pcap_obj);
1056 } /* static int main(int argc, char *argv[]) */
1059 * vim:shiftwidth=4:tabstop=8:softtabstop=4