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Added the new_dnscache routine to initialize the Ternary tree. Also,

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removed the garbage collection routine.
This commit is contained in:
Robert James Kaes 2000-10-23 21:42:31 +00:00
parent 21e4d8a9bd
commit 670fad4a41
2 changed files with 10 additions and 17 deletions
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24
src/dnscache.c
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@ -1,4 +1,4 @@
/* $Id: dnscache.c,v 1.6 2000-09-26 04:59:48 rjkaes Exp $
/* $Id: dnscache.c,v 1.7 2000-10-23 21:42:31 rjkaes Exp $
*
* This is a caching DNS system. When a host name is needed we look it up here
* and see if there is already an answer for it. The domains are placed in a
@ -34,7 +34,6 @@
#include "utils.h"
#define DNSEXPIRE (5 * 60)
#define DNS_GARBAGE_COL 10
struct dnscache_s {
struct in_addr ipaddr;
@ -43,14 +42,16 @@ struct dnscache_s {
static TERNARY dns_tree;
int new_dnscache(void)
{
dns_tree = ternary_new();
return dns_tree;
}
static int dns_lookup(struct in_addr *addr, char *domain)
{
struct dnscache_s *ptr;
if (dns_tree == 0) {
if (TE_ISERROR(dns_tree = ternary_new()))
return dns_tree;
}
if (TE_ISERROR(ternary_search(dns_tree, domain, (void *)&ptr)))
return -1;
@ -82,16 +83,7 @@ static int dns_insert(struct in_addr *addr, char *domain)
int dnscache(struct in_addr *addr, char *domain)
{
static unsigned int dns_garbage_collect = 0;
struct hostent *resolv;
#if 0
if (++dns_garbage_collect > DNS_GARBAGE_COL) {
ternary_destroy(&dns_root, &free);
DEBUG1("Doing garbage collection.");
dns_garbage_collect = 0;
}
#endif
if (inet_aton(domain, (struct in_addr *) addr) != 0)
return 0;

3
src/dnscache.h
View File

@ -1,4 +1,4 @@
/* $Id: dnscache.h,v 1.2 2000-09-11 23:42:43 rjkaes Exp $
/* $Id: dnscache.h,v 1.3 2000-10-23 21:42:31 rjkaes Exp $
*
* See 'dnscache.c' for a detailed description.
*
@ -20,6 +20,7 @@
#include <arpa/inet.h>
extern int new_dnscache(void);
extern int dnscache(struct in_addr *addr, char *domain);
#endif