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add test support for dropping edns messages (-T dropedns); ignoring edns in queries (-T noedns); variable max UDP (-T maxudp=value)

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This commit is contained in:
Mark Andrews
2012-10-16 10:23:08 +11:00
parent 71dfdcbfae
commit 4b17401c9c
5 changed files with 28 additions and 4 deletions
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10
bin/named/client.c
View File

@@ -1656,8 +1656,18 @@ client_request(isc_task_t *task, isc_event_t *event) {
/*
* Deal with EDNS.
*/
if (ns_g_noedns)
opt = NULL;
else
opt = dns_message_getopt(client->message);
if (opt != NULL) {
/*
* Are we dropping all EDNS queries?
*/
if (ns_g_dropedns) {
ns_client_next(client, ISC_R_SUCCESS);
goto cleanup;
}
/*
* Set the client's UDP buffer size.
*/

2
bin/named/include/named/globals.h
View File

@@ -152,6 +152,8 @@ EXTERN int ns_g_listen INIT(3);
EXTERN isc_time_t ns_g_boottime;
EXTERN isc_boolean_t ns_g_memstatistics INIT(ISC_FALSE);
EXTERN isc_boolean_t ns_g_clienttest INIT(ISC_FALSE);
EXTERN isc_boolean_t ns_g_dropedns INIT(ISC_FALSE);
EXTERN isc_boolean_t ns_g_noedns INIT(ISC_FALSE);
EXTERN isc_boolean_t ns_g_nosoa INIT(ISC_FALSE);
EXTERN isc_boolean_t ns_g_noaa INIT(ISC_FALSE);
EXTERN unsigned int ns_g_delay INIT(0);

7
bin/named/main.c
View File

@@ -525,6 +525,13 @@ parse_command_line(int argc, char *argv[]) {
maxudp = 512;
else if (!strcmp(isc_commandline_argument, "maxudp1460"))
maxudp = 1460;
else if (!strcmp(isc_commandline_argument, "dropedns"))
ns_g_dropedns = ISC_TRUE;
else if (!strcmp(isc_commandline_argument, "noedns"))
ns_g_noedns = ISC_TRUE;
else if (!strncmp(isc_commandline_argument,
"maxudp=", 7))
maxudp = atoi(isc_commandline_argument + 7);
else if (!strncmp(isc_commandline_argument,
"delay=", 6))
ns_g_delay = atoi(isc_commandline_argument + 6);

2
bin/tests/system/start.pl
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@@ -253,7 +253,7 @@ sub verify_server {
my $tries = 0;
while (1) {
my $return = system("$DIG +tcp +noadd +nosea +nostat +noquest +nocomm +nocmd -p 5300 version.bind. chaos txt \@10.53.0.$n > dig.out");
my $return = system("$DIG +tcp +noadd +nosea +nostat +noquest +nocomm +nocmd +noedns -p 5300 version.bind. chaos txt \@10.53.0.$n > dig.out");
last if ($return == 0);
if (++$tries >= 30) {
print `grep ";" dig.out > /dev/null`;

7
lib/isc/unix/socket.c
View File

@@ -1765,7 +1765,7 @@ doio_recv(isc__socket_t *sock, isc_socketevent_t *dev) {
}
/*
* Simulate a firewall blocking UDP responses bigger than
* 512 bytes.
* 'maxudp' bytes.
*/
if (sock->manager->maxudp != 0 && cc > sock->manager->maxudp)
return (DOIO_SOFT);
@@ -1859,6 +1859,11 @@ doio_send(isc__socket_t *sock, isc_socketevent_t *dev) {
build_msghdr_send(sock, dev, &msghdr, iov, &write_count);
resend:
if (sock->type == isc_sockettype_udp &&
sock->manager->maxudp != 0 &&
write_count > (size_t)sock->manager->maxudp)
cc = write_count;
else
cc = sendmsg(sock->fd, &msghdr, 0);
send_errno = errno;