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avoid reencoding the same reply in mesh reply.

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git-svn-id: file:///svn/unbound/trunk@981 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2008-02-22 09:23:42 +00:00
parent 104a7fb3ea
commit bc7d3dc192
2 changed files with 21 additions and 3 deletions
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4
doc/Changelog
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@ -1,3 +1,7 @@
22 February 2008: Wouter
- +2% for recursions, if identical queries (except for destination
and query ID) in the reply list, avoid re-encoding the answer.
21 February 2008: Wouter
- speedup of root-delegation message encoding by 15%.
- minor speedup of compress tree_lookup, maybe 1%.

20
services/mesh.c
View file

@ -510,10 +510,11 @@ mesh_do_callback(struct mesh_state* m, int rcode, struct reply_info* rep,
* @param rcode: if not 0, error code.
* @param rep: reply to send (or NULL if rcode is set).
* @param r: reply entry
* @param prev: previous reply, already has its answer encoded in buffer.
*/
static void
mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
struct mesh_reply* r)
struct mesh_reply* r, struct mesh_reply* prev)
{
struct timeval end_time;
struct timeval duration;
@ -529,7 +530,18 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
if(!rep && rcode == LDNS_RCODE_NOERROR)
rcode = LDNS_RCODE_SERVFAIL;
/* send the reply */
if(rcode) {
if(prev && prev->qflags == r->qflags &&
prev->edns.edns_present == r->edns.edns_present &&
prev->edns.bits == r->edns.bits &&
prev->edns.udp_size == r->edns.udp_size) {
/* if the previous reply is identical to this one, fix ID */
if(prev->query_reply.c->buffer != r->query_reply.c->buffer)
ldns_buffer_copy(r->query_reply.c->buffer,
prev->query_reply.c->buffer);
ldns_buffer_write_at(r->query_reply.c->buffer, 0,
&r->qid, sizeof(uint16_t));
comm_point_send_reply(&r->query_reply);
} else if(rcode) {
error_encode(r->query_reply.c->buffer, rcode, &m->s.qinfo,
r->qid, r->qflags, &r->edns);
comm_point_send_reply(&r->query_reply);
@ -564,11 +576,13 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
void mesh_query_done(struct mesh_state* mstate)
{
struct mesh_reply* r;
struct mesh_reply* prev = NULL;
struct mesh_cb* c;
struct reply_info* rep = (mstate->s.return_msg?
mstate->s.return_msg->rep:NULL);
for(r = mstate->reply_list; r; r = r->next) {
mesh_send_reply(mstate, mstate->s.return_rcode, rep, r);
mesh_send_reply(mstate, mstate->s.return_rcode, rep, r, prev);
prev = r;
}
for(c = mstate->cb_list; c; c = c->next) {
mesh_do_callback(mstate, mstate->s.return_rcode, rep, c);