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Bugfix event handling with sync TCP pipelining

This commit is contained in:
Willem Toorop 2014-10-20 23:51:05 +02:00
parent e9548fc5fb
commit ae8105bd78
1 changed files with 40 additions and 13 deletions
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53
src/stub.c
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@ -586,6 +586,7 @@ stub_tcp_read_cb(void *userarg)
GETDNS_CLEAR_EVENT(dnsreq->loop, &netreq->event);
if (q != netreq->query_id)
return;
/* TODO: fallback to TCP when TC bit set */
netreq->state = NET_REQ_FINISHED;
ldns_wire2pkt(&(netreq->result), netreq->tcp.read_buf,
netreq->tcp.read_pos - netreq->tcp.read_buf);
@ -601,11 +602,14 @@ stub_tcp_read_cb(void *userarg)
}
}
static void netreq_upstream_read_cb(void *userarg);
static void netreq_upstream_write_cb(void *userarg);
static void
upstream_read_cb(void *userarg)
{
getdns_upstream *upstream = (getdns_upstream *)userarg;
getdns_network_req *netreq;
getdns_dns_req *dnsreq;
int q;
uint16_t query_id;
intptr_t query_id_intptr;
@ -638,19 +642,39 @@ upstream_read_cb(void *userarg)
netreq->bogus = 0;
stub_cleanup(netreq);
priv_getdns_check_dns_req_complete(netreq->owner);
}
/* reset read buffer */
upstream->tcp.read_pos = upstream->tcp.read_buf;
upstream->tcp.to_read = 2;
/* Nothing more to read? Then, deschedule the reads.*/
if (! upstream->netreq_by_query_id.count) {
upstream->event.read_cb = NULL;
GETDNS_CLEAR_EVENT(upstream->loop, &upstream->event);
if (upstream->event.write_cb)
GETDNS_SCHEDULE_EVENT(upstream->loop,
upstream->fd, TIMEOUT_FOREVER, &upstream->event);
/* reset read buffer */
upstream->tcp.read_pos = upstream->tcp.read_buf;
upstream->tcp.to_read = 2;
/* More the read/write for syncronous lookups? */
if (netreq->event.read_cb) {
dnsreq = netreq->owner;
GETDNS_CLEAR_EVENT(dnsreq->loop, &netreq->event);
if (upstream->netreq_by_query_id.count ||
upstream->write_queue)
GETDNS_SCHEDULE_EVENT(
dnsreq->loop, upstream->fd,
dnsreq->context->timeout,
getdns_eventloop_event_init(
&netreq->event, netreq,
( upstream->netreq_by_query_id.count ?
netreq_upstream_read_cb : NULL ),
( upstream->write_queue ?
netreq_upstream_write_cb : NULL),
stub_timeout_cb));
}
priv_getdns_check_dns_req_complete(netreq->owner);
/* Nothing more to read? Then, deschedule the reads.*/
if (! upstream->netreq_by_query_id.count) {
upstream->event.read_cb = NULL;
GETDNS_CLEAR_EVENT(upstream->loop, &upstream->event);
if (upstream->event.write_cb)
GETDNS_SCHEDULE_EVENT(upstream->loop,
upstream->fd, TIMEOUT_FOREVER,
&upstream->event);
}
}
}
@ -860,7 +884,10 @@ upstream_write_cb(void *userarg)
GETDNS_SCHEDULE_EVENT(
dnsreq->loop, upstream->fd, dnsreq->context->timeout,
getdns_eventloop_event_init(&netreq->event, netreq,
netreq_upstream_read_cb, NULL, stub_timeout_cb));
netreq_upstream_read_cb,
( upstream->write_queue ?
netreq_upstream_write_cb : NULL),
stub_timeout_cb));
}
return;
}