Re: ProxyPass dns issues (patch)

diff -urN apache_1.3.27/src/modules/proxy/mod_proxy.c apache_1.3.27.ite/src/modules/proxy/mod_proxy.c
--- apache_1.3.27/src/modules/proxy/mod_proxy.c	2002-06-18 02:59:59.000000000 +0200
+++ apache_1.3.27.ite/src/modules/proxy/mod_proxy.c	2003-02-13 23:33:45.000000000 +0100
@@ -434,6 +434,8 @@
     ps->domain = NULL;
     ps->viaopt = via_off;       /* initially backward compatible with 1.3.1 */
     ps->viaopt_set = 0;         /* 0 means default */
+    ps->reverse_lookups = 1;
+    ps->reverse_lookups_set = 0;
     ps->req = 0;
     ps->req_set = 0;
     ps->recv_buffer_size = 0;   /* this default was left unset for some
@@ -482,6 +484,7 @@
 
     ps->domain = (overrides->domain == NULL) ? base->domain : overrides->domain;
     ps->viaopt = (overrides->viaopt_set == 0) ? base->viaopt : overrides->viaopt;
+    ps->reverse_lookups = (overrides->reverse_lookups_set == 0) ? base->reverse_lookups : overrides->reverse_lookups;
     ps->req = (overrides->req_set == 0) ? base->req : overrides->req;
     ps->recv_buffer_size = (overrides->recv_buffer_size_set == 0) ? base->recv_buffer_size : overrides->recv_buffer_size;
     ps->io_buffer_size = (overrides->io_buffer_size_set == 0) ? base->io_buffer_size : overrides->io_buffer_size;
@@ -920,6 +923,17 @@
     return NULL;
 }
 
+static const char *
+     set_reverse_lookups(cmd_parms *parms, void *dummy, int flag)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    psf->reverse_lookups = flag;
+    psf->reverse_lookups_set = 1;
+    return NULL;
+}
+
 static const handler_rec proxy_handlers[] =
 {
     {"proxy-server", proxy_handler},
@@ -970,6 +984,8 @@
     "Force a http cache completion after this percentage is loaded"},
     {"ProxyVia", set_via_opt, NULL, RSRC_CONF, TAKE1,
     "Configure Via: proxy header header to one of: on | off | block | full"},
+    {"ReverseLookups", set_reverse_lookups, NULL, RSRC_CONF, FLAG,
+    "On if reverse lookups for remote connections are needed"},
     {NULL}
 };
 
diff -urN apache_1.3.27/src/modules/proxy/mod_proxy.h apache_1.3.27.ite/src/modules/proxy/mod_proxy.h
--- apache_1.3.27/src/modules/proxy/mod_proxy.h	2002-04-21 13:35:07.000000000 +0200
+++ apache_1.3.27.ite/src/modules/proxy/mod_proxy.h	2003-02-13 23:26:17.000000000 +0100
@@ -203,6 +203,8 @@
     char recv_buffer_size_set;
     size_t io_buffer_size;
     char io_buffer_size_set;
+    int reverse_lookups;
+    char reverse_lookups_set;
 } proxy_server_conf;
 
 struct hdr_entry {
@@ -306,6 +308,7 @@
 cache_req *ap_proxy_cache_error(cache_req *r);
 int ap_proxyerror(request_rec *r, int statuscode, const char *message);
 const char *ap_proxy_host2addr(const char *host, struct hostent *reqhp);
+const char *ap_proxy_host2addr_ext(const char *host, struct hostent *reqhp, int reverse);
 int ap_proxy_is_ipaddr(struct dirconn_entry *This, pool *p);
 int ap_proxy_is_domainname(struct dirconn_entry *This, pool *p);
 int ap_proxy_is_hostname(struct dirconn_entry *This, pool *p);
diff -urN apache_1.3.27/src/modules/proxy/proxy_http.c apache_1.3.27.ite/src/modules/proxy/proxy_http.c
--- apache_1.3.27/src/modules/proxy/proxy_http.c	2002-09-03 09:12:46.000000000 +0200
+++ apache_1.3.27.ite/src/modules/proxy/proxy_http.c	2003-02-13 23:13:18.000000000 +0100
@@ -225,13 +225,13 @@
 
     if (proxyhost != NULL) {
         server.sin_port = htons((unsigned short)proxyport);
-        err = ap_proxy_host2addr(proxyhost, &server_hp);
+        err = ap_proxy_host2addr_ext(proxyhost, &server_hp, conf->reverse_lookups);
         if (err != NULL)
             return DECLINED;    /* try another */
     }
     else {
         server.sin_port = htons((unsigned short)destport);
-        err = ap_proxy_host2addr(desthost, &server_hp);
+        err = ap_proxy_host2addr_ext(desthost, &server_hp, conf->reverse_lookups);
         if (err != NULL)
             return ap_proxyerror(r, HTTP_INTERNAL_SERVER_ERROR, err);
     }
diff -urN apache_1.3.27/src/modules/proxy/proxy_util.c apache_1.3.27.ite/src/modules/proxy/proxy_util.c
--- apache_1.3.27/src/modules/proxy/proxy_util.c	2002-07-22 18:26:03.000000000 +0200
+++ apache_1.3.27.ite/src/modules/proxy/proxy_util.c	2003-02-13 23:22:31.000000000 +0100
@@ -974,14 +974,20 @@
     return statuscode;
 }
 
+const char *
+     ap_proxy_host2addr(const char *host, struct hostent * reqhp) {
+	     
+     return ap_proxy_host2addr_ext(host, reqhp, 1);
+}
+
 /*
  * This routine returns its own error message
  */
 const char *
-     ap_proxy_host2addr(const char *host, struct hostent * reqhp)
+     ap_proxy_host2addr_ext(const char *host, struct hostent * reqhp, int reverse)
 {
     int i;
-    struct hostent *hp;
+    struct hostent *hp = NULL;
     struct per_thread_data *ptd = get_per_thread_data();
 
     for (i = 0; host[i] != '\0'; i++)
@@ -995,7 +1001,8 @@
     }
     else {
         ptd->ipaddr = ap_inet_addr(host);
-        hp = gethostbyaddr((char *)&ptd->ipaddr, sizeof(ptd->ipaddr), AF_INET);
+        if (reverse)
+            hp = gethostbyaddr((char *)&ptd->ipaddr, sizeof(ptd->ipaddr), AF_INET);
         if (hp == NULL) {
             memset(&ptd->hpbuf, 0, sizeof(ptd->hpbuf));
             ptd->hpbuf.h_name = 0;