Pantyhose-X/tinyproxy
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Added the host name lookup code (which use to be in the DNS caching

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system.)
This commit is contained in:
Robert James Kaes 2001-12-15 05:58:30 +00:00
parent b15be9de3e
commit a4934e2232
1 changed files with 46 additions and 3 deletions
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49
src/sock.c
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@ -1,4 +1,4 @@
/* $Id: sock.c,v 1.18 2001-11-25 02:21:46 rjkaes Exp $
/* $Id: sock.c,v 1.19 2001-12-15 05:58:30 rjkaes Exp $
*
* Sockets are created and destroyed here. When a new connection comes in from
* a client, we need to copy the socket and the create a second socket to the
@ -23,7 +23,6 @@
#include "tinyproxy.h"
#include "dnscache.h"
#include "log.h"
#include "sock.h"
#include "utils.h"
@ -38,6 +37,50 @@ static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
#define LOCK() pthread_mutex_lock(&mutex);
#define UNLOCK() pthread_mutex_unlock(&mutex);
/*
* The mutex is used for locking around accesses to gethostbyname()
* function.
*/
static pthread_mutex_t gethostbyname_mutex = PTHREAD_MUTEX_INITIALIZER;
#define LOOKUP_LOCK() pthread_mutex_lock(&gethostbyname_mutex);
#define LOOKUP_UNLOCK() pthread_mutex_unlock(&gethostbyname_mutex);
/*
* Take a string host address and return a struct in_addr so we can connect
* to the remote host.
*
* Return a negative if there is a problem.
*/
static int
lookup_domain(struct in_addr *addr, char *domain)
{
struct hostent *resolv;
if (!addr || !domain)
return -1;
/*
* First check to see if the domain is in dotted-decimal format.
*/
if (inet_aton(domain, (struct in_addr *)addr) != 0)
return 0;
/*
* Okay, it's an alpha-numeric domain, so look it up.
*/
LOOKUP_LOCK();
if (!(resolv = gethostbyname(domain))) {
LOOKUP_UNLOCK();
return -1;
}
memcpy(addr, resolv->h_addr_list[0], resolv->h_length);
LOOKUP_UNLOCK();
return 0;
}
/* This routine is so old I can't even remember writing it. But I do
* remember that it was an .h file because I didn't know putting code in a
* header was bad magic yet. anyway, this routine opens a connection to a
@ -64,7 +107,7 @@ opensock(char *ip_addr, uint16_t port)
port_info.sin_family = AF_INET;
/* Lookup and return the address if possible */
ret = dnscache(&port_info.sin_addr, ip_addr);
ret = lookup_domain(&port_info.sin_addr, ip_addr);
if (ret < 0) {
log_message(LOG_ERR,