mir/bind
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/bind9 synced 2025-08-30 05:57:52 +00:00
Code Issues Releases Wiki Activity

post-review cleanups

Browse Source
This commit is contained in:
Bob Halley 1999-11-23 20:54:20 +00:00
parent 7ab5937e0b
commit 91d0c4e268
1 changed files with 38 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
lib/dns/resolver.c
View File

@ -85,19 +85,22 @@
#define QTRACE(m)
#endif
/*
* Maximum EDNS0 input packet size.
*/
#define SEND_BUFFER_SIZE 2048 /* XXXRTH Constant. */
typedef struct fetchctx fetchctx_t;
typedef struct query {
/* Not locked. */
/* Locked by task event serialization. */
unsigned int magic;
fetchctx_t * fctx;
dns_dispatch_t * dispatch;
dns_adbaddrinfo_t * addrinfo;
isc_time_t start;
dns_messageid_t id;
dns_dispentry_t * dispentry; /* XXX name */
dns_dispentry_t * dispentry;
ISC_LINK(struct query) link;
isc_buffer_t buffer;
dns_rdata_any_tsig_t *tsig;
@ -111,9 +114,9 @@ typedef struct query {
(query)->magic == QUERY_MAGIC)
typedef enum {
fetchstate_init = 0,
fetchstate_init = 0, /* Start event has not run yet. */
fetchstate_active,
fetchstate_done
fetchstate_done /* FETCHDONE events posted. */
} fetchstate;
struct fetchctx {
@ -123,16 +126,16 @@ struct fetchctx {
dns_name_t name;
dns_rdatatype_t type;
unsigned int options;
isc_task_t * task;
isc_task_t * task; /* XXX??? */
unsigned int bucketnum;
/* Locked by lock. */
/* Locked by appropriate bucket lock. */
fetchstate state;
isc_boolean_t want_shutdown;
unsigned int references;
isc_event_t control_event;
isc_event_t control_event; /* locked? */
ISC_LINK(struct fetchctx) link;
ISC_LIST(dns_fetchevent_t) events;
/* Only changable by event actions running in the context's task */
/* Locked by task event serialization. */
dns_name_t domain;
dns_rdataset_t nameservers;
unsigned int attributes;
@ -144,6 +147,9 @@ struct fetchctx {
ISC_LIST(resquery_t) queries;
dns_adbfindlist_t finds;
dns_adbfind_t * find;
/*
* # of events we're waiting for.
*/
unsigned int pending;
unsigned int restarts;
};
@ -187,7 +193,7 @@ typedef struct fctxbucket {
} fctxbucket_t;
struct dns_resolver {
/* Unlocked */
/* Unlocked. */
unsigned int magic;
isc_mem_t * mctx;
isc_mutex_t lock;
@ -268,6 +274,11 @@ fctx_cancelquery(resquery_t **queryp, dns_dispatchevent_t **deventp,
FCTXTRACE("cancelquery");
/*
* XXXRTH We don't want to set RTT in some cases (e.g. canceled due
* to client disinterest). Also, deal with dropped UDP datagram
* case. Don't improve RTT if this wasn't a measured time.
*/
if (finish != NULL) {
rtt = (unsigned int)isc_time_microdiff(finish, &query->start);
factor = DNS_ADB_RTTADJDEFAULT;
@ -287,7 +298,6 @@ fctx_cancelquery(resquery_t **queryp, dns_dispatchevent_t **deventp,
}
dns_adb_adjustsrtt(fctx->res->view->adb, query->addrinfo, rtt, factor);
if (query->dispentry != NULL)
dns_dispatch_removeresponse(query->dispatch, &query->dispentry,
deventp);
@ -917,7 +927,7 @@ fctx_getaddresses(fetchctx_t *fctx) {
FCTXTRACE("getaddresses");
/*
* Don't pound on remote servers.
* Don't pound on remote servers. (Failsafe!)
*/
fctx->restarts++;
if (fctx->restarts > 10)
@ -945,7 +955,8 @@ fctx_getaddresses(fetchctx_t *fctx) {
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &r);
/*
* XXXRTH If this name is the same as QNAME, remember to
* XXXRTH If this name is the same as QNAME (and we're
* looking for an address type), remember to
* skip it, and remember that we did so so we can
* use an ancestor QDOMAIN if we find no addresses.
*/
@ -1070,7 +1081,6 @@ static void
fctx_try(fetchctx_t *fctx) {
isc_result_t result;
dns_adbaddrinfo_t *addrinfo;
unsigned int options;
FCTXTRACE("try");
@ -1117,11 +1127,7 @@ fctx_try(fetchctx_t *fctx) {
* just send a single query.
*/
options = fctx->options;
/*
* XXXRTH If the addrinfo doesn't understand EDNS, turn it off.
*/
result = fctx_query(fctx, addrinfo, options);
result = fctx_query(fctx, addrinfo, fctx->options);
if (result != ISC_R_SUCCESS)
fctx_done(fctx, result);
}
@ -2999,8 +3005,13 @@ dns_resolver_create(dns_view_t *view,
unsigned int i, buckets_created = 0;
in_port_t port = 5353;
REQUIRE(resp != NULL && *resp == NULL);
/*
* Create a resolver.
*/
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(ntasks > 0);
REQUIRE(resp != NULL && *resp == NULL);
res = isc_mem_get(view->mctx, sizeof *res);
if (res == NULL)
@ -3333,6 +3344,13 @@ dns_resolver_createfetch(dns_resolver_t *res, dns_name_t *name,
(void)forwarders;
REQUIRE(VALID_RESOLVER(res));
/* XXXRTH Check for meta type */
REQUIRE(DNS_RDATASET_VALID(nameservers));
REQUIRE(forwarders == NULL);
REQUIRE(nameservers->type == dns_rdatatype_ns);
REQUIRE(!dns_rdataset_isassociated(rdataset));
REQUIRE(sigrdataset == NULL ||
!dns_rdataset_isassociated(sigrdataset));
REQUIRE(fetchp != NULL && *fetchp == NULL);
log_fetch(name, type);
@ -3429,6 +3447,7 @@ dns_resolver_cancelfetch(dns_resolver_t *res, dns_fetch_t *fetch) {
break;
}
}
/* XXXRTH INSIST that we found it? */
}
if (event != NULL) {
etask = event->sender;