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270. [func] Allow maximum sized TCP answers.

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This commit is contained in:
Mark Andrews 2000-06-22 00:05:11 +00:00
parent 9bff67898d
commit b35a009df8
3 changed files with 27 additions and 5 deletions
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2
CHANGES
View File

@ -1,3 +1,5 @@
270. [func] Allow maximum sized TCP answers.
269. [bug] Failed DNSSEC validations could cause an assertion
failure by causing clone_results() to be called with
with hevent->node == NULL.

29
bin/named/client.c
View File

@ -72,7 +72,9 @@
#define TCP_CLIENT(c) (((c)->attributes & NS_CLIENTATTR_TCP) != 0)
#define TCP_BUFFER_SIZE (65535 + 2)
#define SEND_BUFFER_SIZE 2048
#define RECV_BUFFER_SIZE 2048
struct ns_clientmgr {
/* Unlocked. */
@ -223,6 +225,8 @@ client_free(ns_client_t *client) {
isc_mem_put(client->mctx, client->sendbuf, SEND_BUFFER_SIZE);
isc_timer_detach(&client->timer);
if (client->sendbuf != NULL)
isc_mem_put(client->mctx, client->sendbuf, TCP_BUFFER_SIZE);
if (client->opt != NULL) {
INSIST(dns_rdataset_isassociated(client->opt));
dns_rdataset_disassociate(client->opt);
@ -571,6 +575,11 @@ client_senddone(isc_task_t *task, isc_event_t *event) {
INSIST(client->nsends > 0);
client->nsends--;
if (client->tcpbuf != NULL) {
isc_mem_put(client->mctx, client->tcpbuf, TCP_BUFFER_SIZE);
client->tcpbuf = NULL;
}
isc_event_free(&event);
@ -599,7 +608,6 @@ ns_client_send(ns_client_t *client) {
if ((client->attributes & NS_CLIENTATTR_RA) != 0)
client->message->flags |= DNS_MESSAGEFLAG_RA;
data = client->sendbuf;
/*
* XXXRTH The following doesn't deal with TSIGs, TCP buffer resizing,
* or ENDS1 more data packets.
@ -608,9 +616,14 @@ ns_client_send(ns_client_t *client) {
/*
* XXXRTH "tcpbuffer" is a hack to get things working.
*/
isc_buffer_init(&tcpbuffer, data, SEND_BUFFER_SIZE);
isc_buffer_init(&buffer, data + 2, SEND_BUFFER_SIZE - 2);
client->tcpbuf = isc_mem_get(client->mctx, TCP_BUFFER_SIZE);
if (client->tcpbuf == NULL)
goto done;
data = client->tcpbuf;
isc_buffer_init(&tcpbuffer, data, TCP_BUFFER_SIZE);
isc_buffer_init(&buffer, data + 2, TCP_BUFFER_SIZE - 2);
} else {
data = client->sendbuf;
if (client->udpsize < SEND_BUFFER_SIZE)
bufsize = client->udpsize;
else
@ -623,7 +636,7 @@ ns_client_send(ns_client_t *client) {
goto done;
if (client->opt != NULL) {
result = dns_message_setopt(client->message, client->opt);
if (result != ISC_R_SUCCESS)
if (result != ISC_R_SUCCESS)
goto done;
/*
* XXXRTH dns_message_setopt() should probably do this...
@ -683,7 +696,12 @@ ns_client_send(ns_client_t *client) {
client->nsends++;
return;
}
done:
if (client->tcpbuf != NULL) {
isc_mem_put(client->mctx, client->tcpbuf, TCP_BUFFER_SIZE);
client->tcpbuf = NULL;
}
ns_client_next(client, result);
}
@ -755,7 +773,7 @@ client_addopt(ns_client_t *client) {
/*
* Set Maximum UDP buffer size.
*/
rdatalist->rdclass = SEND_BUFFER_SIZE;
rdatalist->rdclass = RECV_BUFFER_SIZE;
/*
* Set EXTENDED-RCODE, VERSION, and Z to 0.
@ -1155,6 +1173,7 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp)
client->tcplistener = NULL;
client->tcpsocket = NULL;
client->tcpmsg_valid = ISC_FALSE;
client->tcpbuf = NULL;
client->opt = NULL;
client->udpsize = 512;
client->next = NULL;

1
bin/named/include/named/client.h
View File

@ -97,6 +97,7 @@ struct ns_client {
dns_dispatchevent_t * dispevent;
isc_socket_t * tcplistener;
isc_socket_t * tcpsocket;
unsigned char * tcpbuf;
dns_tcpmsg_t tcpmsg;
isc_boolean_t tcpmsg_valid;
isc_timer_t * timer;