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1127. [func] rndc: If the server to contact has multiple addresses,

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try all of them.
This commit is contained in:
Brian Wellington 2001-11-14 23:12:18 +00:00
parent 0f1938c982
commit b6b9d8b843
3 changed files with 43 additions and 28 deletions
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3
CHANGES
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@ -1,3 +1,6 @@
1127. [func] rndc: If the server to contact has multiple addresses,
try all of them.
1126. [bug] The server could access a freed event if shut
down while a client start event was pending
delivery. [RT #2061]

12
FAQ
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@ -253,15 +253,3 @@ use those to make sure you reach the correct view on the other machine.
You put the external address on the alias so that all the other
dns clients on these boxes see the internal view by default.
Q: When I try to use rndc, I get the error message "network
unreachable" or "connection refused", even though I know named is
running.
A: You probably have "default-server localhost" in /etc/rndc.conf,
your /etc/hosts or DNS maps "localhost" to both the IPv4 loopback
address 127.0.0.1 and the IPv6 loopback address ::1, and you do not
have IPv6 fully operational. Change the "default-server localhost" to
"default-server 127.0.0.1" to make sure rdnc does not try to contact
the name server using IPv6.

56
bin/rndc/rndc.c
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@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: rndc.c,v 1.82 2001/11/14 22:08:34 bwelling Exp $ */
/* $Id: rndc.c,v 1.83 2001/11/14 23:12:18 bwelling Exp $ */
/*
* Principal Author: DCL
@ -53,6 +53,8 @@
#include "util.h"
#define SERVERADDRS 4
char *progname;
isc_boolean_t verbose;
@ -60,6 +62,9 @@ static const char *admin_conffile;
static const char *admin_keyfile;
static const char *version = VERSION;
static const char *servername = NULL;
static isc_sockaddr_t serveraddrs[SERVERADDRS];
static int nserveraddrs;
static int currentaddr = 0;
static unsigned int remoteport = 0;
static isc_socketmgr_t *socketmgr = NULL;
static unsigned char databuf[2048];
@ -73,6 +78,8 @@ static char *args;
static char program[256];
static isc_socket_t *sock = NULL;
static void rndc_startconnect(isc_sockaddr_t *addr, isc_task_t *task);
static void
usage(int status) {
fprintf(stderr, "\
@ -110,17 +117,17 @@ Version: %s\n",
}
static void
get_address(const char *host, in_port_t port, isc_sockaddr_t *sockaddr) {
int count;
get_addresses(const char *host, in_port_t port) {
isc_result_t result;
isc_app_block();
result = bind9_getaddresses(host, port, sockaddr, 1, &count);
result = bind9_getaddresses(servername, port,
serveraddrs, SERVERADDRS, &nserveraddrs);
isc_app_unblock();
if (result != ISC_R_SUCCESS)
fatal("couldn't get address for '%s': %s",
host, isc_result_totext(result));
INSIST(count == 1);
INSIST(nserveraddrs > 0);
}
static void
@ -202,8 +209,19 @@ rndc_connected(isc_task_t *task, isc_event_t *event) {
connects--;
if (sevent->result != ISC_R_SUCCESS)
fatal("connect failed: %s", isc_result_totext(sevent->result));
if (sevent->result != ISC_R_SUCCESS) {
if (sevent->result == ISC_R_CONNREFUSED &&
currentaddr < nserveraddrs)
{
isc_event_free(&event);
notify("connection refused");
isc_socket_detach(&sock);
rndc_startconnect(&serveraddrs[currentaddr++], task);
return;
} else
fatal("connect failed: %s",
isc_result_totext(sevent->result));
}
isc_stdtime_get(&now);
srandom(now + isc_thread_self());
@ -237,27 +255,33 @@ rndc_connected(isc_task_t *task, isc_event_t *event) {
}
static void
rndc_start(isc_task_t *task, isc_event_t *event) {
isc_sockaddr_t addr;
rndc_startconnect(isc_sockaddr_t *addr, isc_task_t *task) {
isc_result_t result;
char socktext[ISC_SOCKADDR_FORMATSIZE];
isc_event_free(&event);
get_address(servername, (in_port_t) remoteport, &addr);
isc_sockaddr_format(&addr, socktext, sizeof(socktext));
isc_sockaddr_format(addr, socktext, sizeof(socktext));
notify("using server %s (%s)", servername, socktext);
DO("create socket", isc_socket_create(socketmgr,
isc_sockaddr_pf(&addr),
isc_sockaddr_pf(addr),
isc_sockettype_tcp, &sock));
DO("connect", isc_socket_connect(sock, &addr, task, rndc_connected,
DO("connect", isc_socket_connect(sock, addr, task, rndc_connected,
NULL));
connects++;
}
static void
rndc_start(isc_task_t *task, isc_event_t *event) {
isc_event_free(&event);
get_addresses(servername, (in_port_t) remoteport);
currentaddr = 0;
rndc_startconnect(&serveraddrs[currentaddr++], task);
}
static void
parse_config(isc_mem_t *mctx, isc_log_t *log, const char *keyname,
cfg_parser_t **pctxp, cfg_obj_t **configp)