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fixes bug 166479 "DNS: user resinit() to update DNS list when lookup fails

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(changing networks, DHCP, etc.)" r=dougt sr=blizzard


git-svn-id: svn://10.0.0.236/trunk@130308 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
darin%netscape.com
2002-09-24 00:11:54 +00:00
parent 2063611822
commit d27333cec6
1 changed files with 26 additions and 1 deletions
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27
mozilla/netwerk/dns/src/nsDnsService.cpp
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@@ -41,6 +41,14 @@
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <resolv.h>
#elif defined(__linux)
#define RESOLVE_RES_NINIT 1
// try to dynamically resolve "__res_ninit" (we may want to enable this
// for other XP_UNIX platforms as well)
#include <dlfcn.h>
#ifndef RTLD_DEFAULT
#define RTLD_DEFAULT ((void*)0)
#endif
#endif
#include "nsDnsService.h"
@@ -1172,7 +1180,7 @@ nsDNSService::Unlock()
PRBool
nsDNSService::Reset()
{
#ifdef HAVE_RES_NINIT
#if defined(HAVE_RES_NINIT) || defined(RESOLVE_RES_NINIT)
// On platforms where res_ninit() is available and supported
// by Mozilla, we shall attempt to reinitialize the dns
// resolver. Since this method may be called many times in
@@ -1185,7 +1193,24 @@ nsDNSService::Reset()
if (gService &&
PR_IntervalNow() - gService->mLastReset >= gService->mResetMaxInterval) {
#ifdef HAVE_RES_NINIT
(void) res_ninit(&_res);
#else
// manually resolve library symbols. this code is designed
// to be compiled under rh6x (where res_ninit does not exist)
// and be run under rh7x (where res_ninit does exist)
static int (*res_ninit)(void *) = NULL;
static void *(*res_state)(void ) = NULL;
static PRBool tried = PR_FALSE;
if (!tried) {
res_ninit = (int (*)(void *)) dlsym(RTLD_DEFAULT, "__res_ninit");
res_state = (void *(*)(void )) dlsym(RTLD_DEFAULT, "__res_state");
tried = PR_TRUE;
}
if (!res_ninit || !res_state)
return PR_FALSE;
res_ninit(res_state());
#endif
gService->mLastReset = PR_IntervalNow();
return PR_TRUE;