php-src/ext/standard/dns.c
2000-06-05 19:47:54 +00:00

320 lines
8.1 KiB
C

/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997, 1998, 1999, 2000 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef PHP_WIN32
#if HAVE_BINDLIB
#ifndef WINNT
#define WINNT 1
#endif
/* located in www.php.net/extra/bindlib.zip */
#include "arpa/inet.h"
#include "netdb.h"
#include "arpa/nameser.h"
#include "resolv.h"
#endif
#include <winsock.h>
#else
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef _OSD_POSIX
#undef STATUS
#undef T_UNSPEC
#endif
#include <arpa/nameser.h>
#include <resolv.h>
#endif
#include "dns.h"
char *php_gethostbyaddr(char *ip);
char *php_gethostbyname(char *name);
/* {{{ proto string gethostbyaddr(string ip_address)
Get the Internet host name corresponding to a given IP address */
PHP_FUNCTION(gethostbyaddr)
{
pval **arg;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg);
return_value->value.str.val = php_gethostbyaddr((*arg)->value.str.val);
return_value->value.str.len = strlen(return_value->value.str.val);
return_value->type = IS_STRING;
}
/* }}} */
char *php_gethostbyaddr(char *ip)
{
struct in_addr addr;
struct hostent *hp;
addr.s_addr = inet_addr(ip);
if (addr.s_addr == -1) {
#if PHP_DEBUG
php_error(E_WARNING, "address not in a.b.c.d form");
#endif
return estrdup(ip);
}
hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
if (!hp) {
#if PHP_DEBUG
php_error(E_WARNING, "Unable to resolve %s\n", ip);
#endif
return estrdup(ip);
}
return estrdup(hp->h_name);
}
/* {{{ proto string gethostbyname(string hostname)
Get the IP address corresponding to a given Internet host name */
PHP_FUNCTION(gethostbyname)
{
pval **arg;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg);
return_value->value.str.val = php_gethostbyname((*arg)->value.str.val);
return_value->value.str.len = strlen(return_value->value.str.val);
return_value->type = IS_STRING;
}
/* }}} */
/* {{{ proto array gethostbynamel(string hostname)
Return a list of IP addresses that a given hostname resolves to. */
PHP_FUNCTION(gethostbynamel)
{
pval **arg;
struct hostent *hp;
struct in_addr in;
int i;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg);
if (array_init(return_value) == FAILURE) {
RETURN_FALSE;
}
hp = gethostbyname((*arg)->value.str.val);
if (hp == NULL || hp->h_addr_list == NULL) {
#if PHP_DEBUG
php_error(E_WARNING, "Unable to resolve %s\n", (*arg)->value.str.val);
#endif
return;
}
for (i = 0 ; hp->h_addr_list[i] != 0 ; i++) {
in = *(struct in_addr *) hp->h_addr_list[i];
add_next_index_string(return_value, inet_ntoa(in), 1);
}
return;
}
/* }}} */
char *php_gethostbyname(char *name)
{
struct hostent *hp;
struct in_addr in;
hp = gethostbyname(name);
if (!hp || !hp->h_addr_list) {
#if PHP_DEBUG
php_error(E_WARNING, "Unable to resolve %s\n", name);
#endif
return estrdup(name);
}
memcpy(&in.s_addr, *(hp->h_addr_list), sizeof(in.s_addr));
return estrdup(inet_ntoa(in));
}
#if !defined(PHP_WIN32)||HAVE_BINDLIB
/* {{{ proto int checkdnsrr(string host [, string type])
Check DNS records corresponding to a given Internet host name or IP address */
PHP_FUNCTION(checkdnsrr)
{
pval **arg1,**arg2;
int type,i;
#ifndef MAXPACKET
#define MAXPACKET 8192 /* max packet size used internally by BIND */
#endif
u_char ans[MAXPACKET];
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
type = T_MX;
convert_to_string_ex(arg1);
break;
case 2:
if (zend_get_parameters_ex(2, &arg1, &arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg1);
convert_to_string_ex(arg2);
if ( !strcasecmp("A",(*arg2)->value.str.val) ) type = T_A;
else if ( !strcasecmp("NS",(*arg2)->value.str.val) ) type = T_NS;
else if ( !strcasecmp("MX",(*arg2)->value.str.val) ) type = T_MX;
else if ( !strcasecmp("PTR",(*arg2)->value.str.val) ) type = T_PTR;
else if ( !strcasecmp("ANY",(*arg2)->value.str.val) ) type = T_ANY;
else if ( !strcasecmp("SOA",(*arg2)->value.str.val) ) type = T_SOA;
else if ( !strcasecmp("CNAME",(*arg2)->value.str.val) ) type = T_CNAME;
else {
php_error(E_WARNING,"Type '%s' not supported",(*arg2)->value.str.val);
RETURN_FALSE;
}
break;
default:
WRONG_PARAM_COUNT;
}
i = res_search((*arg1)->value.str.val,C_IN,type,ans,sizeof(ans));
if ( i < 0 ) {
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
#ifndef HFIXEDSZ
#define HFIXEDSZ 12 /* fixed data in header <arpa/nameser.h> */
#endif /* HFIXEDSZ */
#ifndef QFIXEDSZ
#define QFIXEDSZ 4 /* fixed data in query <arpa/nameser.h> */
#endif /* QFIXEDSZ */
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif /* MAXHOSTNAMELEN */
/* {{{ proto int getmxrr(string hostname, array mxhosts [, array weight])
Get MX records corresponding to a given Internet host name */
PHP_FUNCTION(getmxrr)
{
pval *host, *mx_list, *weight_list;
int need_weight = 0;
int count,qdc;
u_short type,weight;
u_char ans[MAXPACKET];
char buf[MAXHOSTNAMELEN];
HEADER *hp;
u_char *cp,*end;
int i;
switch(ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters(ht, 2, &host, &mx_list) == FAILURE) {
WRONG_PARAM_COUNT;
}
if (!ParameterPassedByReference(ht, 2)) {
php_error(E_WARNING, "Array to be filled with values must be passed by reference.");
RETURN_FALSE;
}
break;
case 3:
if (zend_get_parameters(ht, 3, &host, &mx_list, &weight_list) == FAILURE) {
WRONG_PARAM_COUNT;
}
if (!ParameterPassedByReference(ht, 2) || !ParameterPassedByReference(ht, 3)) {
php_error(E_WARNING, "Array to be filled with values must be passed by reference.");
RETURN_FALSE;
}
need_weight = 1;
pval_destructor(weight_list); /* start with clean array */
if ( array_init(weight_list) == FAILURE ) {
RETURN_FALSE;
}
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string( host );
pval_destructor(mx_list); /* start with clean array */
if ( array_init(mx_list) == FAILURE ) {
RETURN_FALSE;
}
/* Go! */
i = res_search(host->value.str.val,C_IN,T_MX,(u_char *)&ans,sizeof(ans));
if ( i < 0 ) {
RETURN_FALSE;
}
if ( i > sizeof(ans) ) i = sizeof(ans);
hp = (HEADER *)&ans;
cp = (u_char *)&ans + HFIXEDSZ;
end = (u_char *)&ans +i;
for ( qdc = ntohs((unsigned short)hp->qdcount); qdc--; cp += i + QFIXEDSZ) {
if ( (i = dn_skipname(cp,end)) < 0 ) {
RETURN_FALSE;
}
}
count = ntohs((unsigned short)hp->ancount);
while ( --count >= 0 && cp < end ) {
if ( (i = dn_skipname(cp,end)) < 0 ) {
RETURN_FALSE;
}
cp += i;
GETSHORT(type,cp);
cp += INT16SZ + INT32SZ;
GETSHORT(i,cp);
if ( type != T_MX ) {
cp += i;
continue;
}
GETSHORT(weight,cp);
if ( (i = dn_expand(ans,end,cp,buf,sizeof(buf)-1)) < 0 ) {
RETURN_FALSE;
}
cp += i;
add_next_index_string(mx_list, buf, 1);
if ( need_weight ) {
add_next_index_long(weight_list, weight);
}
}
RETURN_TRUE;
}
/* }}} */
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/