host.c File Reference

#include <stdio.h>
#include <sys/types.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <resolv.h>
#include <sys/param.h>
#include <strings.h>
#include <ctype.h>

Include dependency graph for host.c:

Go to the source code of this file.

Data Structures
union	querybuf
Defines
#define	NUMMX   50
#define	SUCCESS   0
#define	TIME_OUT   -1
#define	NO_INFO   -2
#define	ERROR   -3
#define	NONAUTH   -4
#define	NAME_LEN   256
#define	T_TXT   16
#define	NO_DATA   NO_ADDRESS
#define	C_HS   4
#define	NUMNS   8
#define	IPADDRSIZE   4
#define	NUMNSADDR   16
Typedefs
typedef querybuf	querybuf_t
Functions
int main	_ARGS ((int c, char *v[]))
static int parsetype	_ARGS ((char *s))
static void hperror	_ARGS ((int errno))
static void printanswer	_ARGS ((struct hostent *hp))
static int ListHosts	_ARGS ((char *namePtr, int queryType))
static int gethostinfo	_ARGS ((char *name))
static int getdomaininfo	_ARGS ((char *name, char *domain))
static int getinfo	_ARGS ((char *name, char *domain, int type))
static int printinfo	_ARGS ((union querybuf *answer, u8_t *eom, int filter, int isls))
static char *DecodeError	_ARGS ((int result))
static u8_t *pr_rr	_ARGS ((u8_t *cp, u8_t *msg, FILE *file, int filter))
static u8_t *pr_cdname	_ARGS ((u8_t *cp, u8_t *msg, u8_t *name, int namelen))
static char *pr_class	_ARGS ((int class))
static char *pr_type	_ARGS ((int type))
static int tcpip_writeall	_ARGS ((int fd, char *buf, unsigned siz))
int	main (c, char **v)
static int	parsetype (char *s)
static int	parseclass (char *s)
static void	printanswer (struct hostent *hp)
static void	hperror (int errno)
static int	gethostinfo (char *name)
static int	getdomaininfo (char *name, char *domain)
static int	getinfo (char *name, char *domain, type)
static int	printinfo (querybuf_t *answer, u8_t *eom, int filter, int isls)
static u8_t *	pr_rr (u8_t *cp, u8_t *msg, FILE *file, int filter)
static char *	pr_type (int type)
static char *	pr_class (int class)
static u8_t *	pr_cdname (u8_t *cp, u8_t *msg, u8_t *name, int namelen)
static int	ListHosts (char *namePtr, int queryType)
static char *	DecodeError (int result)
static int	tcpip_writeall (int fd, char *buf, unsigned siz)
Variables
int	h_errno
FILE *	filePtr
state	orig
state	_res
static u8_t *	cname = NULL
int	getclass = C_IN
int	gettype
int	getdeftype = T_A
int	verbose = 0
int	list = 0
int	server_specified = 0
static u8_t	hostbuf [BUFSIZ+1]
static u8_t	cnamebuf [MAXDNAME]
static char	nbuf [20]
char *	resultcodes []

---

Define Documentation

#define C_HS   4

Definition at line 74 of file host.c. Referenced by parseclass(), and pr_class().

#define ERROR   -3

Definition at line 62 of file host.c.

#define IPADDRSIZE   4

Referenced by ListHosts().

#define NAME_LEN   256

Definition at line 65 of file host.c. Referenced by ListHosts().

#define NO_DATA   NO_ADDRESS

Definition at line 71 of file host.c. Referenced by printinfo(), and res_query().

#define NO_INFO   -2

Definition at line 61 of file host.c. Referenced by DecodeError().

#define NONAUTH   -4

Definition at line 63 of file host.c. Referenced by DecodeError().

#define NUMMX   50

Definition at line 57 of file host.c.

#define NUMNS   8

Referenced by ListHosts().

#define NUMNSADDR   16

Referenced by ListHosts().

#define SUCCESS   0

Definition at line 59 of file host.c.

#define T_TXT   16

Definition at line 68 of file host.c. Referenced by parsetype(), pr_rr(), pr_type(), and query_chaos().

#define TIME_OUT   -1

Definition at line 60 of file host.c. Referenced by DecodeError().

---

Typedef Documentation

typedef union querybuf querybuf_t

---

Function Documentation

static int tcpip_writeall _ARGS (  (int fd, char *buf, unsigned siz)   )  [static]

static char* pr_type _ARGS (  (int type)   )  [static]

static char* pr_class _ARGS (  (int class)   )  [static]

static u8_t* pr_cdname _ARGS (  (u8_t *cp, u8_t *msg, u8_t *name, int namelen)   )  [static]

static u8_t* pr_rr _ARGS (  (u8_t *cp, u8_t *msg, FILE *file, int filter)   )  [static]

static char* DecodeError _ARGS (  (int result)   )  [static]

static int printinfo _ARGS (  (union querybuf *answer, u8_t *eom, int filter, int isls)   )  [static]

static int getinfo _ARGS (  (char *name, char *domain, int type)   )  [static]

static int getdomaininfo _ARGS (  (char *name, char *domain)   )  [static]

static int gethostinfo _ARGS (  (char *name)   )  [static]

static int ListHosts _ARGS (  (char *namePtr, int queryType)   )  [static]

static void printanswer _ARGS (  (struct hostent *hp)   )  [static]

static void hperror _ARGS (  (int errno)   )  [static]

static int parseclass _ARGS (  (char *s)   )  [static]

int main _ARGS (  (int c, char *v[])   )

static char* DecodeError (  int  result  )  [static]

Definition at line 1369 of file host.c. References ERROR, FORMERR, NO_INFO, NOCHANGE, NOERROR, NONAUTH, NOTIMP, NXDOMAIN, REFUSED, SERVFAIL, and TIME_OUT. Referenced by ListHosts(), and printinfo().

static int getdomaininfo (  char *  name, char *  domain )  [static]

Definition at line 442 of file host.c. References getdeftype, getinfo(), and gettype. Referenced by gethostinfo().

static int gethostinfo (  char *  name  )  [static]

Definition at line 385 of file host.c. References cp, getdomaininfo(), n, NULL, and strcmp. Referenced by main().

static int getinfo (  char *  name, char *  domain, type  )  [static]

Definition at line 449 of file host.c. References _res, answer, bp, buf, buflen, cp, getclass, h_errno, host, i, j, MAXDNAME, n, NO_RECOVERY, NULL, state::options, printf, printinfo(), QUERY, RES_DEBUG, res_mkquery(), res_send(), sprintf(), T_ANY, TRY_AGAIN, and type. Referenced by getdomaininfo().

static void hperror (  int  errno  )  [static]

Definition at line 356 of file host.c. References fprintf(), HOST_NOT_FOUND, NO_ADDRESS, NO_RECOVERY, stderr, and TRY_AGAIN. Referenced by main().

static int ListHosts (  char *  namePtr, int  queryType )  [static]

Definition at line 961 of file host.c. References _res, answer, bcopy, buf, C_IN, cp, DecodeError(), DHF_AA, DHF_RCODE, dlen, dn_expand(), dn_skipname(), ERROR, error, FORMERR, i, IPADDRSIZE, NAME_LEN, NOERROR, NOTIMP, ntohs, NUMNS, NUMNSADDR, NXDOMAIN, state::options, printf, QFIXEDSZ, QUERY, REFUSED, RES_DEBUG, res_mkquery(), res_send(), result, server_specified, SERVFAIL, strcasecmp, strlen(), strncpy(), T_A, T_NS, type, and verbose. Referenced by main().

int main (  c  , char **  v )

Definition at line 110 of file host.c. References _res, addr, atoi, c, exit(), fprintf(), getclass, getdeftype, gethostbyname, gethostinfo(), gettype, h_errno, hperror(), htons, inet_aton(), inet_ntoa(), list, ListHosts(), NAMESERVER_PORT, state::nsaddr_list, state::nsport_list, NULL, state::options, p, parseclass(), parsetype(), printanswer(), printf, RES_DEBUG, RES_DEFNAMES, res_init(), RES_RECURSE, RES_USEVC, state::retrans, state::retry, s, server_specified, sprintf(), stderr, strchr, strcmp, strncmp(), T_ANY, T_PTR, TRY_AGAIN, and verbose.

static int parseclass (  char *  s  )  [static]

Definition at line 321 of file host.c. References atoi, C_ANY, C_CHAOS, C_HS, C_IN, exit(), fprintf(), stderr, and strcmp. Referenced by main().

static int parsetype (  char *  s  )  [static]

Definition at line 267 of file host.c. References atoi, exit(), fprintf(), stderr, strcmp, and T_TXT. Referenced by main().

static u8_t* pr_cdname (  u8_t *  cp, u8_t *  msg, u8_t *  name, int  namelen )  [static]

Definition at line 905 of file host.c. References dn_expand(), n, and NULL. Referenced by pr_rr().

static char* pr_class (  int  class  )  [static]

Definition at line 886 of file host.c. References C_ANY, C_CHAOS, C_HS, C_IN, EOF, NULL, sprintf(), and verbose. Referenced by pr_rr().

static u8_t* pr_rr (  u8_t *  cp, u8_t *  msg, FILE *  file, int  filter )  [static]

Definition at line 594 of file host.c. References bcopy, c, C_IN, dlen, dn_expand(), doprint(), file, fprintf(), getprotobynumber(), getservbyport(), gettype, htons, inet_ntoa(), int(), MAXDNAME, n, NULL, pr_cdname(), pr_class(), pr_type(), proto, strcat(), T_A, T_ANY, T_CNAME, T_GID, T_HINFO, T_MB, T_MD, T_MF, T_MG, T_MINFO, T_MR, T_MX, T_NS, T_PTR, T_SOA, T_TXT, T_UID, T_UINFO, T_WKS, type, and verbose. Referenced by printinfo().

static char* pr_type (  int  type  )  [static]

Definition at line 823 of file host.c. References EOF, NULL, sprintf(), T_A, T_ANY, T_AXFR, T_CNAME, T_GID, T_HINFO, T_MAILA, T_MAILB, T_MB, T_MD, T_MF, T_MG, T_MINFO, T_MR, T_MX, T_NS, T_NULL, T_PTR, T_SOA, T_TXT, T_UID, T_UINFO, T_WKS, and verbose. Referenced by pr_rr().

static void printanswer (  struct hostent *  hp  )  [static]

Definition at line 339 of file host.c. References cp, inet_ntoa(), and printf. Referenced by main().

static int printinfo (  querybuf_t *  answer, u8_t *  eom, int  filter, int  isls )  [static]

Definition at line 485 of file host.c. References _res, bp, buflen, cp, DecodeError(), dns_hdr::dh_ancount, dns_hdr::dh_arcount, dns_hdr::dh_flag1, dns_hdr::dh_flag2, dns_hdr::dh_nscount, dns_hdr::dh_qdcount, DHF_AA, DHF_RCODE, dn_skipname(), FORMERR, h_errno, HOST_NOT_FOUND, i, j, n, NO_DATA, NO_RECOVERY, NOERROR, NOTIMP, ntohs, NXDOMAIN, state::options, pr_rr(), printf, QFIXEDSZ, REFUSED, RES_DEBUG, SERVFAIL, stdout, TRY_AGAIN, and verbose. Referenced by getinfo().

static int tcpip_writeall (  int  fd, char *  buf, unsigned  siz )  [static]

Definition at line 1389 of file host.c. References assert, nbytes, and write.

---

Variable Documentation

struct state _res

Definition at line 52 of file res_init.c. Referenced by endhostent(), getanswer(), gethostbyaddr(), getinfo(), ListHosts(), main(), printinfo(), res_init(), res_mkquery(), res_query(), res_querydomain(), res_search(), res_send(), and sethostent().

u8_t* cname = NULL [static]

Definition at line 81 of file host.c.

u8_t cnamebuf[MAXDNAME] [static]

Definition at line 588 of file host.c.

FILE* filePtr

Definition at line 77 of file host.c.

int getclass = C_IN

Definition at line 82 of file host.c. Referenced by getanswer(), getinfo(), and main().

int getdeftype = T_A

Definition at line 83 of file host.c. Referenced by getdomaininfo(), and main().

int gettype

Definition at line 83 of file host.c. Referenced by getdomaininfo(), main(), and pr_rr().

int h_errno

Definition at line 69 of file res_query.c. Referenced by getanswer(), gethostbyname(), getinfo(), main(), printinfo(), res_init(), res_query(), and res_search().

u8_t hostbuf[BUFSIZ+1] [static]

Definition at line 381 of file host.c.

int list = 0

Definition at line 85 of file host.c. Referenced by addtomach(), c_list(), caselist(), cleandir(), command(), delete_config(), descendtree(), dogroup(), m_paragraph(), main(), parsecmd(), push_attr(), restore_attr(), and shorten().

char nbuf[20] [static]

Definition at line 817 of file host.c. Referenced by chg_buf(), do_file(), dumpopts(), main(), and res_querydomain().

struct state orig

Definition at line 79 of file host.c. Referenced by main().

char* resultcodes[]

Initial value: { "NOERROR", "FORMERR", "SERVFAIL", "NXDOMAIN", "NOTIMP", "REFUSED", "6", "7", "8", "9", "10", "11", "12", "13", "14", "NOCHANGE", } Definition at line 921 of file host.c.

int server_specified = 0

Definition at line 86 of file host.c. Referenced by ListHosts(), and main().

int verbose = 0

Definition at line 84 of file host.c.

---