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utils_dns.c
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utils_dns.c
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/*
* collectd - src/utils_dns.c
* Modifications Copyright (C) 2006 Florian octo Forster
* Copyright (C) 2002 The Measurement Factory, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of The Measurement Factory nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Authors:
* The Measurement Factory, Inc. <http://www.measurement-factory.com/>
* Florian octo Forster <octo at verplant.org>
*/
#define _BSD_SOURCE
#include "collectd.h"
#include "plugin.h"
#include "common.h"
#if HAVE_NETINET_IN_SYSTM_H
# include <netinet/in_systm.h>
#endif
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#if HAVE_NETINET_IP6_H
# include <netinet/ip6.h>
#endif
#if HAVE_NETINET_IP_COMPAT_H
# include <netinet/ip_compat.h>
#endif
#if HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if HAVE_ARPA_NAMESER_H
# include <arpa/nameser.h>
#endif
#if HAVE_ARPA_NAMESER_COMPAT_H
# include <arpa/nameser_compat.h>
#endif
#if HAVE_NET_IF_ARP_H
# include <net/if_arp.h>
#endif
#if HAVE_NET_IF_H
# include <net/if.h>
#endif
#if HAVE_NETINET_IF_ETHER_H
# include <netinet/if_ether.h>
#endif
#if HAVE_NET_PPP_DEFS_H
# include <net/ppp_defs.h>
#endif
#if HAVE_NET_IF_PPP_H
# include <net/if_ppp.h>
#endif
#if HAVE_NETDB_H
# include <netdb.h>
#endif
#if HAVE_NETINET_IP_H
# include <netinet/ip.h>
#endif
#ifdef HAVE_NETINET_IP_VAR_H
# include <netinet/ip_var.h>
#endif
#if HAVE_NETINET_IP6_H
# include <netinet/ip6.h>
#endif
#if HAVE_NETINET_UDP_H
# include <netinet/udp.h>
#endif
#if HAVE_PCAP_H
# include <pcap.h>
#endif
#define PCAP_SNAPLEN 1460
#ifndef ETHER_HDR_LEN
#define ETHER_ADDR_LEN 6
#define ETHER_TYPE_LEN 2
#define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
#endif
#ifndef ETHERTYPE_8021Q
# define ETHERTYPE_8021Q 0x8100
#endif
#ifndef ETHERTYPE_IPV6
# define ETHERTYPE_IPV6 0x86DD
#endif
#ifndef PPP_ADDRESS_VAL
# define PPP_ADDRESS_VAL 0xff /* The address byte value */
#endif
#ifndef PPP_CONTROL_VAL
# define PPP_CONTROL_VAL 0x03 /* The control byte value */
#endif
#if HAVE_STRUCT_UDPHDR_UH_DPORT && HAVE_STRUCT_UDPHDR_UH_SPORT
# define UDP_DEST uh_dport
# define UDP_SRC uh_sport
#elif HAVE_STRUCT_UDPHDR_DEST && HAVE_STRUCT_UDPHDR_SOURCE
# define UDP_DEST dest
# define UDP_SRC source
#else
# error "`struct udphdr' is unusable."
#endif
#include "utils_dns.h"
/*
* Type definitions
*/
struct ip_list_s
{
struct in6_addr addr;
void *data;
struct ip_list_s *next;
};
typedef struct ip_list_s ip_list_t;
typedef int (printer)(const char *, ...);
/*
* flags/features for non-interactive mode
*/
#ifndef T_A6
#define T_A6 38
#endif
#ifndef T_SRV
#define T_SRV 33
#endif
/*
* Global variables
*/
int qtype_counts[T_MAX];
int opcode_counts[OP_MAX];
int qclass_counts[C_MAX];
#if HAVE_PCAP_H
static pcap_t *pcap_obj = NULL;
#endif
static ip_list_t *IgnoreList = NULL;
#if HAVE_PCAP_H
static void (*Callback) (const rfc1035_header_t *) = NULL;
static int query_count_intvl = 0;
static int query_count_total = 0;
# ifdef __OpenBSD__
static struct bpf_timeval last_ts;
# else
static struct timeval last_ts;
# endif /* __OpenBSD__ */
#endif /* HAVE_PCAP_H */
static int cmp_in6_addr (const struct in6_addr *a,
const struct in6_addr *b)
{
int i;
assert (sizeof (struct in6_addr) == 16);
for (i = 0; i < 16; i++)
if (a->s6_addr[i] != b->s6_addr[i])
break;
if (i >= 16)
return (0);
return (a->s6_addr[i] > b->s6_addr[i] ? 1 : -1);
} /* int cmp_addrinfo */
static inline int ignore_list_match (const struct in6_addr *addr)
{
ip_list_t *ptr;
for (ptr = IgnoreList; ptr != NULL; ptr = ptr->next)
if (cmp_in6_addr (addr, &ptr->addr) == 0)
return (1);
return (0);
} /* int ignore_list_match */
static void ignore_list_add (const struct in6_addr *addr)
{
ip_list_t *new;
if (ignore_list_match (addr) != 0)
return;
new = malloc (sizeof (ip_list_t));
if (new == NULL)
{
perror ("malloc");
return;
}
memcpy (&new->addr, addr, sizeof (struct in6_addr));
new->next = IgnoreList;
IgnoreList = new;
} /* void ignore_list_add */
void ignore_list_add_name (const char *name)
{
struct addrinfo *ai_list;
struct addrinfo *ai_ptr;
struct in6_addr addr;
int status;
status = getaddrinfo (name, NULL, NULL, &ai_list);
if (status != 0)
return;
for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
{
if (ai_ptr->ai_family == AF_INET)
{
memset (&addr, '\0', sizeof (addr));
addr.s6_addr[10] = 0xFF;
addr.s6_addr[11] = 0xFF;
memcpy (addr.s6_addr + 12, &((struct sockaddr_in *) ai_ptr->ai_addr)->sin_addr, 4);
ignore_list_add (&addr);
}
else
{
ignore_list_add (&((struct sockaddr_in6 *) ai_ptr->ai_addr)->sin6_addr);
}
} /* for */
freeaddrinfo (ai_list);
}
#if HAVE_PCAP_H
static void in6_addr_from_buffer (struct in6_addr *ia,
const void *buf, size_t buf_len,
int family)
{
memset (ia, 0, sizeof (struct in6_addr));
if ((AF_INET == family) && (sizeof (uint32_t) == buf_len))
{
ia->s6_addr[10] = 0xFF;
ia->s6_addr[11] = 0xFF;
memcpy (ia->s6_addr + 12, buf, buf_len);
}
else if ((AF_INET6 == family) && (sizeof (struct in6_addr) == buf_len))
{
memcpy (ia, buf, buf_len);
}
} /* void in6_addr_from_buffer */
void dnstop_set_pcap_obj (pcap_t *po)
{
pcap_obj = po;
}
void dnstop_set_callback (void (*cb) (const rfc1035_header_t *))
{
Callback = cb;
}
#define RFC1035_MAXLABELSZ 63
static int
rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns
)
{
off_t no = 0;
unsigned char c;
size_t len;
static int loop_detect = 0;
if (loop_detect > 2)
return 4; /* compression loop */
if (ns <= 0)
return 4; /* probably compression loop */
do {
if ((*off) >= sz)
break;
c = *(buf + (*off));
if (c > 191) {
/* blasted compression */
int rc;
unsigned short s;
off_t ptr;
memcpy(&s, buf + (*off), sizeof(s));
s = ntohs(s);
(*off) += sizeof(s);
/* Sanity check */
if ((*off) >= sz)
return 1; /* message too short */
ptr = s & 0x3FFF;
/* Make sure the pointer is inside this message */
if (ptr >= sz)
return 2; /* bad compression ptr */
if (ptr < DNS_MSG_HDR_SZ)
return 2; /* bad compression ptr */
loop_detect++;
rc = rfc1035NameUnpack(buf, sz, &ptr, name + no, ns - no);
loop_detect--;
return rc;
} else if (c > RFC1035_MAXLABELSZ) {
/*
* "(The 10 and 01 combinations are reserved for future use.)"
*/
return 3; /* reserved label/compression flags */
break;
} else {
(*off)++;
len = (size_t) c;
if (len == 0)
break;
if (len > (ns - 1))
len = ns - 1;
if ((*off) + len > sz)
return 4; /* message is too short */
if (no + len + 1 > ns)
return 5; /* qname would overflow name buffer */
memcpy(name + no, buf + (*off), len);
(*off) += len;
no += len;
*(name + (no++)) = '.';
}
} while (c > 0);
if (no > 0)
*(name + no - 1) = '\0';
/* make sure we didn't allow someone to overflow the name buffer */
assert(no <= ns);
return 0;
}
static int
handle_dns(const char *buf, int len)
{
rfc1035_header_t qh;
uint16_t us;
off_t offset;
char *t;
int status;
/* The DNS header is 12 bytes long */
if (len < DNS_MSG_HDR_SZ)
return 0;
memcpy(&us, buf + 0, 2);
qh.id = ntohs(us);
memcpy(&us, buf + 2, 2);
us = ntohs(us);
qh.qr = (us >> 15) & 0x01;
qh.opcode = (us >> 11) & 0x0F;
qh.aa = (us >> 10) & 0x01;
qh.tc = (us >> 9) & 0x01;
qh.rd = (us >> 8) & 0x01;
qh.ra = (us >> 7) & 0x01;
qh.z = (us >> 6) & 0x01;
qh.ad = (us >> 5) & 0x01;
qh.cd = (us >> 4) & 0x01;
qh.rcode = us & 0x0F;
memcpy(&us, buf + 4, 2);
qh.qdcount = ntohs(us);
memcpy(&us, buf + 6, 2);
qh.ancount = ntohs(us);
memcpy(&us, buf + 8, 2);
qh.nscount = ntohs(us);
memcpy(&us, buf + 10, 2);
qh.arcount = ntohs(us);
offset = DNS_MSG_HDR_SZ;
memset(qh.qname, '\0', MAX_QNAME_SZ);
status = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
if (status != 0)
{
INFO ("utils_dns: handle_dns: rfc1035NameUnpack failed "
"with status %i.", status);
return 0;
}
if ('\0' == qh.qname[0])
sstrncpy (qh.qname, ".", sizeof (qh.qname));
while ((t = strchr(qh.qname, '\n')))
*t = ' ';
while ((t = strchr(qh.qname, '\r')))
*t = ' ';
for (t = qh.qname; *t; t++)
*t = tolower((int) *t);
memcpy(&us, buf + offset, 2);
qh.qtype = ntohs(us);
memcpy(&us, buf + offset + 2, 2);
qh.qclass = ntohs(us);
qh.length = (uint16_t) len;
/* gather stats */
qtype_counts[qh.qtype]++;
qclass_counts[qh.qclass]++;
opcode_counts[qh.opcode]++;
if (Callback != NULL)
Callback (&qh);
return 1;
}
static int
handle_udp(const struct udphdr *udp, int len)
{
char buf[PCAP_SNAPLEN];
if ((ntohs (udp->UDP_DEST) != 53)
&& (ntohs (udp->UDP_SRC) != 53))
return 0;
memcpy(buf, udp + 1, len - sizeof(*udp));
if (0 == handle_dns(buf, len - sizeof(*udp)))
return 0;
return 1;
}
#if HAVE_NETINET_IP6_H
static int
handle_ipv6 (struct ip6_hdr *ipv6, int len)
{
char buf[PCAP_SNAPLEN];
unsigned int offset;
int nexthdr;
struct in6_addr c_src_addr;
uint16_t payload_len;
if (0 > len)
return (0);
offset = sizeof (struct ip6_hdr);
nexthdr = ipv6->ip6_nxt;
c_src_addr = ipv6->ip6_src;
payload_len = ntohs (ipv6->ip6_plen);
if (ignore_list_match (&c_src_addr))
return (0);
/* Parse extension headers. This only handles the standard headers, as
* defined in RFC 2460, correctly. Fragments are discarded. */
while ((IPPROTO_ROUTING == nexthdr) /* routing header */
|| (IPPROTO_HOPOPTS == nexthdr) /* Hop-by-Hop options. */
|| (IPPROTO_FRAGMENT == nexthdr) /* fragmentation header. */
|| (IPPROTO_DSTOPTS == nexthdr) /* destination options. */
|| (IPPROTO_AH == nexthdr) /* destination options. */
|| (IPPROTO_ESP == nexthdr)) /* encapsulating security payload. */
{
struct ip6_ext ext_hdr;
uint16_t ext_hdr_len;
/* Catch broken packets */
if ((offset + sizeof (struct ip6_ext)) > (unsigned int)len)
return (0);
/* Cannot handle fragments. */
if (IPPROTO_FRAGMENT == nexthdr)
return (0);
memcpy (&ext_hdr, (char *) ipv6 + offset, sizeof (struct ip6_ext));
nexthdr = ext_hdr.ip6e_nxt;
ext_hdr_len = (8 * (ntohs (ext_hdr.ip6e_len) + 1));
/* This header is longer than the packets payload.. WTF? */
if (ext_hdr_len > payload_len)
return (0);
offset += ext_hdr_len;
payload_len -= ext_hdr_len;
} /* while */
/* Catch broken and empty packets */
if (((offset + payload_len) > (unsigned int)len)
|| (payload_len == 0)
|| (payload_len > PCAP_SNAPLEN))
return (0);
if (IPPROTO_UDP != nexthdr)
return (0);
memcpy (buf, (char *) ipv6 + offset, payload_len);
if (handle_udp ((struct udphdr *) buf, payload_len) == 0)
return (0);
return (1); /* Success */
} /* int handle_ipv6 */
/* #endif HAVE_NETINET_IP6_H */
#else /* if !HAVE_NETINET_IP6_H */
static int
handle_ipv6 (__attribute__((unused)) void *pkg,
__attribute__((unused)) int len)
{
return (0);
}
#endif /* !HAVE_NETINET_IP6_H */
static int
handle_ip(const struct ip *ip, int len)
{
char buf[PCAP_SNAPLEN];
int offset = ip->ip_hl << 2;
struct in6_addr c_src_addr;
struct in6_addr c_dst_addr;
if (ip->ip_v == 6)
return (handle_ipv6 ((void *) ip, len));
in6_addr_from_buffer (&c_src_addr, &ip->ip_src.s_addr, sizeof (ip->ip_src.s_addr), AF_INET);
in6_addr_from_buffer (&c_dst_addr, &ip->ip_dst.s_addr, sizeof (ip->ip_dst.s_addr), AF_INET);
if (ignore_list_match (&c_src_addr))
return (0);
if (IPPROTO_UDP != ip->ip_p)
return 0;
memcpy(buf, (void *) ip + offset, len - offset);
if (0 == handle_udp((struct udphdr *) buf, len - offset))
return 0;
return 1;
}
#if HAVE_NET_IF_PPP_H
static int
handle_ppp(const u_char * pkt, int len)
{
char buf[PCAP_SNAPLEN];
unsigned short us;
unsigned short proto;
if (len < 2)
return 0;
if (*pkt == PPP_ADDRESS_VAL && *(pkt + 1) == PPP_CONTROL_VAL) {
pkt += 2; /* ACFC not used */
len -= 2;
}
if (len < 2)
return 0;
if (*pkt % 2) {
proto = *pkt; /* PFC is used */
pkt++;
len--;
} else {
memcpy(&us, pkt, sizeof(us));
proto = ntohs(us);
pkt += 2;
len -= 2;
}
if (ETHERTYPE_IP != proto && PPP_IP != proto)
return 0;
memcpy(buf, pkt, len);
return handle_ip((struct ip *) buf, len);
}
#endif /* HAVE_NET_IF_PPP_H */
static int
handle_null(const u_char * pkt, int len)
{
unsigned int family;
memcpy(&family, pkt, sizeof(family));
if (AF_INET != family)
return 0;
return handle_ip((struct ip *) (pkt + 4), len - 4);
}
#ifdef DLT_LOOP
static int
handle_loop(const u_char * pkt, int len)
{
unsigned int family;
memcpy(&family, pkt, sizeof(family));
if (AF_INET != ntohl(family))
return 0;
return handle_ip((struct ip *) (pkt + 4), len - 4);
}
#endif
#ifdef DLT_RAW
static int
handle_raw(const u_char * pkt, int len)
{
return handle_ip((struct ip *) pkt, len);
}
#endif
static int
handle_ether(const u_char * pkt, int len)
{
char buf[PCAP_SNAPLEN];
struct ether_header *e = (void *) pkt;
unsigned short etype = ntohs(e->ether_type);
if (len < ETHER_HDR_LEN)
return 0;
pkt += ETHER_HDR_LEN;
len -= ETHER_HDR_LEN;
if (ETHERTYPE_8021Q == etype) {
etype = ntohs(*(unsigned short *) (pkt + 2));
pkt += 4;
len -= 4;
}
if ((ETHERTYPE_IP != etype)
&& (ETHERTYPE_IPV6 != etype))
return 0;
memcpy(buf, pkt, len);
if (ETHERTYPE_IPV6 == etype)
return (handle_ipv6 ((void *) buf, len));
else
return handle_ip((struct ip *) buf, len);
}
#ifdef DLT_LINUX_SLL
static int
handle_linux_sll (const u_char *pkt, int len)
{
struct sll_header
{
uint16_t pkt_type;
uint16_t dev_type;
uint16_t addr_len;
uint8_t addr[8];
uint16_t proto_type;
} *hdr;
uint16_t etype;
if ((0 > len) || ((unsigned int)len < sizeof (struct sll_header)))
return (0);
hdr = (struct sll_header *) pkt;
pkt = (u_char *) (hdr + 1);
len -= sizeof (struct sll_header);
etype = ntohs (hdr->proto_type);
if ((ETHERTYPE_IP != etype)
&& (ETHERTYPE_IPV6 != etype))
return 0;
if (ETHERTYPE_IPV6 == etype)
return (handle_ipv6 ((void *) pkt, len));
else
return handle_ip((struct ip *) pkt, len);
}
#endif /* DLT_LINUX_SLL */
/* public function */
void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt)
{
int status;
if (hdr->caplen < ETHER_HDR_LEN)
return;
switch (pcap_datalink (pcap_obj))
{
case DLT_EN10MB:
status = handle_ether (pkt, hdr->caplen);
break;
#if HAVE_NET_IF_PPP_H
case DLT_PPP:
status = handle_ppp (pkt, hdr->caplen);
break;
#endif
#ifdef DLT_LOOP
case DLT_LOOP:
status = handle_loop (pkt, hdr->caplen);
break;
#endif
#ifdef DLT_RAW
case DLT_RAW:
status = handle_raw (pkt, hdr->caplen);
break;
#endif
#ifdef DLT_LINUX_SLL
case DLT_LINUX_SLL:
status = handle_linux_sll (pkt, hdr->caplen);
break;
#endif
case DLT_NULL:
status = handle_null (pkt, hdr->caplen);
break;
default:
ERROR ("handle_pcap: unsupported data link type %d",
pcap_datalink(pcap_obj));
status = 0;
break;
} /* switch (pcap_datalink(pcap_obj)) */
if (0 == status)
return;
query_count_intvl++;
query_count_total++;
last_ts = hdr->ts;
}
#endif /* HAVE_PCAP_H */
const char *qtype_str(int t)
{
static char buf[32];
switch (t) {
#if (defined (__NAMESER)) && (__NAMESER >= 19991001)
case ns_t_a: return ("A");
case ns_t_ns: return ("NS");
case ns_t_md: return ("MD");
case ns_t_mf: return ("MF");
case ns_t_cname: return ("CNAME");
case ns_t_soa: return ("SOA");
case ns_t_mb: return ("MB");
case ns_t_mg: return ("MG");
case ns_t_mr: return ("MR");
case ns_t_null: return ("NULL");
case ns_t_wks: return ("WKS");
case ns_t_ptr: return ("PTR");
case ns_t_hinfo: return ("HINFO");
case ns_t_minfo: return ("MINFO");
case ns_t_mx: return ("MX");
case ns_t_txt: return ("TXT");
case ns_t_rp: return ("RP");
case ns_t_afsdb: return ("AFSDB");
case ns_t_x25: return ("X25");
case ns_t_isdn: return ("ISDN");
case ns_t_rt: return ("RT");
case ns_t_nsap: return ("NSAP");
case ns_t_nsap_ptr: return ("NSAP-PTR");
case ns_t_sig: return ("SIG");
case ns_t_key: return ("KEY");
case ns_t_px: return ("PX");
case ns_t_gpos: return ("GPOS");
case ns_t_aaaa: return ("AAAA");
case ns_t_loc: return ("LOC");
case ns_t_nxt: return ("NXT");
case ns_t_eid: return ("EID");
case ns_t_nimloc: return ("NIMLOC");
case ns_t_srv: return ("SRV");
case ns_t_atma: return ("ATMA");
case ns_t_naptr: return ("NAPTR");
case ns_t_kx: return ("KX");
case ns_t_cert: return ("CERT");
case ns_t_a6: return ("A6");
case ns_t_dname: return ("DNAME");
case ns_t_sink: return ("SINK");
case ns_t_opt: return ("OPT");
# if __NAMESER >= 19991006
case ns_t_tsig: return ("TSIG");
# endif
case ns_t_ixfr: return ("IXFR");
case ns_t_axfr: return ("AXFR");
case ns_t_mailb: return ("MAILB");
case ns_t_maila: return ("MAILA");
case ns_t_any: return ("ANY");
case ns_t_zxfr: return ("ZXFR");
/* #endif __NAMESER >= 19991006 */
#elif (defined (__BIND)) && (__BIND >= 19950621)
case T_A: return ("A"); /* 1 ... */
case T_NS: return ("NS");
case T_MD: return ("MD");
case T_MF: return ("MF");
case T_CNAME: return ("CNAME");
case T_SOA: return ("SOA");
case T_MB: return ("MB");
case T_MG: return ("MG");
case T_MR: return ("MR");
case T_NULL: return ("NULL");
case T_WKS: return ("WKS");
case T_PTR: return ("PTR");
case T_HINFO: return ("HINFO");
case T_MINFO: return ("MINFO");
case T_MX: return ("MX");
case T_TXT: return ("TXT");
case T_RP: return ("RP");
case T_AFSDB: return ("AFSDB");
case T_X25: return ("X25");
case T_ISDN: return ("ISDN");
case T_RT: return ("RT");
case T_NSAP: return ("NSAP");
case T_NSAP_PTR: return ("NSAP_PTR");
case T_SIG: return ("SIG");
case T_KEY: return ("KEY");
case T_PX: return ("PX");
case T_GPOS: return ("GPOS");
case T_AAAA: return ("AAAA");
case T_LOC: return ("LOC");
case T_NXT: return ("NXT");
case T_EID: return ("EID");
case T_NIMLOC: return ("NIMLOC");
case T_SRV: return ("SRV");
case T_ATMA: return ("ATMA");
case T_NAPTR: return ("NAPTR"); /* ... 35 */
#if (__BIND >= 19960801)
case T_KX: return ("KX"); /* 36 ... */
case T_CERT: return ("CERT");
case T_A6: return ("A6");
case T_DNAME: return ("DNAME");
case T_SINK: return ("SINK");
case T_OPT: return ("OPT");
case T_APL: return ("APL");
case T_DS: return ("DS");
case T_SSHFP: return ("SSHFP");
case T_RRSIG: return ("RRSIG");
case T_NSEC: return ("NSEC");
case T_DNSKEY: return ("DNSKEY"); /* ... 48 */
case T_TKEY: return ("TKEY"); /* 249 */
#endif /* __BIND >= 19960801 */
case T_TSIG: return ("TSIG"); /* 250 ... */
case T_IXFR: return ("IXFR");
case T_AXFR: return ("AXFR");
case T_MAILB: return ("MAILB");
case T_MAILA: return ("MAILA");
case T_ANY: return ("ANY"); /* ... 255 */
#endif /* __BIND >= 19950621 */
default:
ssnprintf (buf, sizeof (buf), "#%i", t);
return (buf);
}; /* switch (t) */
/* NOTREACHED */
return (NULL);
}
const char *opcode_str (int o)
{
static char buf[30];
switch (o) {
case 0:
return "Query";
break;
case 1:
return "Iquery";
break;
case 2:
return "Status";
break;
case 4:
return "Notify";
break;
case 5:
return "Update";
break;
default:
ssnprintf(buf, sizeof (buf), "Opcode%d", o);
return buf;
}
/* NOTREACHED */
}
const char *rcode_str (int rcode)
{
static char buf[32];
switch (rcode)
{
#if (defined (__NAMESER)) && (__NAMESER >= 19991006)
case ns_r_noerror: return ("NOERROR");
case ns_r_formerr: return ("FORMERR");
case ns_r_servfail: return ("SERVFAIL");
case ns_r_nxdomain: return ("NXDOMAIN");
case ns_r_notimpl: return ("NOTIMPL");
case ns_r_refused: return ("REFUSED");
case ns_r_yxdomain: return ("YXDOMAIN");
case ns_r_yxrrset: return ("YXRRSET");
case ns_r_nxrrset: return ("NXRRSET");
case ns_r_notauth: return ("NOTAUTH");
case ns_r_notzone: return ("NOTZONE");
case ns_r_max: return ("MAX");
case ns_r_badsig: return ("BADSIG");
case ns_r_badkey: return ("BADKEY");
case ns_r_badtime: return ("BADTIME");
/* #endif __NAMESER >= 19991006 */
#elif (defined (__BIND)) && (__BIND >= 19950621)
case NOERROR: return ("NOERROR");
case FORMERR: return ("FORMERR");
case SERVFAIL: return ("SERVFAIL");
case NXDOMAIN: return ("NXDOMAIN");
case NOTIMP: return ("NOTIMP");
case REFUSED: return ("REFUSED");
#if defined (YXDOMAIN) && defined (NXRRSET)
case YXDOMAIN: return ("YXDOMAIN");
case YXRRSET: return ("YXRRSET");
case NXRRSET: return ("NXRRSET");
case NOTAUTH: return ("NOTAUTH");
case NOTZONE: return ("NOTZONE");
#endif /* RFC2136 rcodes */
#endif /* __BIND >= 19950621 */
default:
ssnprintf (buf, sizeof (buf), "RCode%i", rcode);
return (buf);
}
/* Never reached */
return (NULL);
} /* const char *rcode_str (int rcode) */
#if 0
static int
main(int argc, char *argv[])
{
char errbuf[PCAP_ERRBUF_SIZE];
int x;
struct stat sb;
int readfile_state = 0;
struct bpf_program fp;
port53 = htons(53);
SubReport = Sources_report;
ignore_addr.s_addr = 0;
progname = strdup(strrchr(argv[0], '/') ? strchr(argv[0], '/') + 1 : argv[0]);
srandom(time(NULL));
ResetCounters();
while ((x = getopt(argc, argv, "ab:f:i:pst")) != -1) {
switch (x) {
case 'a':
anon_flag = 1;
break;
case 's':
sld_flag = 1;
break;
case 't':
nld_flag = 1;
break;
case 'p':
promisc_flag = 0;
break;
case 'b':
bpf_program_str = strdup(optarg);
break;
case 'i':
ignore_addr.s_addr = inet_addr(optarg);
break;
case 'f':
set_filter(optarg);
break;
default:
usage();
break;
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
device = strdup(argv[0]);
if (0 == stat(device, &sb))
readfile_state = 1;
if (readfile_state) {
pcap_obj = pcap_open_offline(device, errbuf);
} else {
pcap_obj = pcap_open_live(device, PCAP_SNAPLEN, promisc_flag, 1000, errbuf);
}
if (NULL == pcap_obj) {
fprintf(stderr, "pcap_open_*: %s\n", errbuf);
exit(1);
}
if (0 == isatty(1)) {
if (0 == readfile_state) {
fprintf(stderr, "Non-interactive mode requires savefile argument\n");
exit(1);
}
interactive = 0;
print_func = printf;
}
memset(&fp, '\0', sizeof(fp));
x = pcap_compile(pcap_obj, &fp, bpf_program_str, 1, 0);
if (x < 0) {
fprintf(stderr, "pcap_compile failed\n");
exit(1);
}