ComputerSurge/bind9
3
0
Fork 0
Code Pull Requests 1 Activity

Use system ephemeral ports for default portset

Browse Source 
In dispatch, use system ephemeral ports for default portset instead of
hardcoded <1024,65535> range.
This commit is contained in:
Ondřej Surý
2021-10-04 14:11:57 +02:00
parent e3ac2bd081
commit 6cd548db0b
1 changed files with 10 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
lib/dns/dispatch.c
View File

@@ -20,6 +20,7 @@
#include <isc/atomic.h>
#include <isc/mem.h>
#include <isc/mutex.h>
#include <isc/net.h>
#include <isc/netmgr.h>
#include <isc/portset.h>
#include <isc/print.h>
@@ -749,14 +750,18 @@ done:
/*%
* Create a temporary port list to set the initial default set of dispatch
* ports: [1024, 65535]. This is almost meaningless as the application will
* ephemeral ports. This is almost meaningless as the application will
* normally set the ports explicitly, but is provided to fill some minor corner
* cases.
*/
static void
create_default_portset(isc_mem_t *mctx, isc_portset_t **portsetp) {
create_default_portset(isc_mem_t *mctx, int family, isc_portset_t **portsetp) {
in_port_t low, high;
isc_net_getudpportrange(family, &low, &high);
isc_portset_create(mctx, portsetp);
isc_portset_addrange(*portsetp, 1024, 65535);
isc_portset_addrange(*portsetp, low, high);
}
static isc_result_t
@@ -832,8 +837,8 @@ dns_dispatchmgr_create(isc_mem_t *mctx, isc_nm_t *nm,
ISC_LIST_INIT(mgr->list);
create_default_portset(mctx, &v4portset);
create_default_portset(mctx, &v6portset);
create_default_portset(mctx, AF_INET, &v4portset);
create_default_portset(mctx, AF_INET6, &v6portset);
setavailports(mgr, v4portset, v6portset);