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Fix the detection of alt-network in dns resolver. 

Used to determine proper A/AAAA record request.

bug:10132565
Change-Id: I7229f6672e879920a6fae58672cddd72db78546c
This commit is contained in:
Robert Greenwalt 2013-08-02 15:24:45 -07:00
parent 3287dccf2e
commit 1d8d9a308c
1 changed files with 12 additions and 9 deletions
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21
libc/netbsd/net/getaddrinfo.c
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@ -93,6 +93,7 @@
#include <errno.h> #include <errno.h>
#include <netdb.h> #include <netdb.h>
#include "resolv_private.h" #include "resolv_private.h"
#include <stdbool.h>
#include <stddef.h> #include <stddef.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
@ -1864,17 +1865,19 @@ error:
free(elems); free(elems);
} }
static int _using_alt_dns() static bool _using_default_dns(const char *iface)
{ {
char propname[PROP_NAME_MAX]; char buf[IF_NAMESIZE+1];
char propvalue[PROP_VALUE_MAX]; size_t if_len;
propvalue[0] = 0; // common case
snprintf(propname, sizeof(propname), "net.dns1.%d", getpid()); if (iface == NULL || *iface == '\0') return true;
if (__system_property_get(propname, propvalue) > 0 ) {
return 1; if_len = _resolv_get_default_iface(buf, sizeof(buf));
if (if_len + 1 <= sizeof(buf)) {
if (strcmp(buf, iface) != 0) return false;
} }
return 0; return true;
} }
/*ARGSUSED*/ /*ARGSUSED*/
@ -1924,7 +1927,7 @@ _dns_getaddrinfo(void *rv, void *cb_data, va_list ap)
// Only implement AI_ADDRCONFIG if the application is not // Only implement AI_ADDRCONFIG if the application is not
// using its own DNS servers, since our implementation // using its own DNS servers, since our implementation
// only works on the default connection. // only works on the default connection.
if (!_using_alt_dns()) { if (_using_default_dns(iface)) {
query_ipv6 = _have_ipv6(); query_ipv6 = _have_ipv6();
query_ipv4 = _have_ipv4(); query_ipv4 = _have_ipv4();
} }