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Code Issues Releases Wiki Activity

3917. [bug] dig, nslookup and host now continue on names that are

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too long after applying a search list elements.
                        [RT #36892]
This commit is contained in:
Mark Andrews
2014-08-21 18:05:55 +10:00
parent 80d13a0d45
commit f5695ad0e1
8 changed files with 152 additions and 33 deletions
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81
bin/dig/dighost.c
View File

@@ -369,6 +369,11 @@ connect_timeout(isc_task_t *task, isc_event_t *event);
static void
launch_next_query(dig_query_t *query, isc_boolean_t include_question);
static void
check_next_lookup(dig_lookup_t *lookup);
static isc_boolean_t
next_origin(dig_lookup_t *oldlookup);
static void *
mem_alloc(void *arg, size_t size) {
@@ -1819,8 +1824,10 @@ start_lookup(void) {
}
novalidation:
#endif
setup_lookup(current_lookup);
do_lookup(current_lookup);
if (setup_lookup(current_lookup))
do_lookup(current_lookup);
else if (next_origin(current_lookup))
check_next_lookup(current_lookup);
} else {
check_if_done();
}
@@ -2021,8 +2028,8 @@ followup_lookup(dns_message_t *msg, dig_query_t *query, dns_section_t section)
* Return ISC_TRUE iff there was another searchlist entry.
*/
static isc_boolean_t
next_origin(dig_query_t *query) {
dig_lookup_t *lookup;
next_origin(dig_lookup_t *oldlookup) {
dig_lookup_t *newlookup;
dig_searchlist_t *search;
dns_fixedname_t fixed;
dns_name_t *name;
@@ -2031,7 +2038,7 @@ next_origin(dig_query_t *query) {
INSIST(!free_now);
debug("next_origin()");
debug("following up %s", query->lookup->textname);
debug("following up %s", oldlookup->textname);
if (!usesearch)
/*
@@ -2045,30 +2052,30 @@ next_origin(dig_query_t *query) {
*/
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
result = dns_name_fromstring2(name, query->lookup->textname, NULL,
result = dns_name_fromstring2(name, oldlookup->textname, NULL,
0, NULL);
if (result == ISC_R_SUCCESS &&
(dns_name_isabsolute(name) ||
(int)dns_name_countlabels(name) > ndots))
return (ISC_FALSE);
if (query->lookup->origin == NULL && !query->lookup->need_search)
if (oldlookup->origin == NULL && !oldlookup->need_search)
/*
* Then we just did rootorg; there's nothing left.
*/
return (ISC_FALSE);
if (query->lookup->origin == NULL && query->lookup->need_search) {
lookup = requeue_lookup(query->lookup, ISC_TRUE);
lookup->origin = ISC_LIST_HEAD(search_list);
lookup->need_search = ISC_FALSE;
if (oldlookup->origin == NULL && oldlookup->need_search) {
newlookup = requeue_lookup(oldlookup, ISC_TRUE);
newlookup->origin = ISC_LIST_HEAD(search_list);
newlookup->need_search = ISC_FALSE;
} else {
search = ISC_LIST_NEXT(query->lookup->origin, link);
if (search == NULL && query->lookup->done_as_is)
search = ISC_LIST_NEXT(oldlookup->origin, link);
if (search == NULL && oldlookup->done_as_is)
return (ISC_FALSE);
lookup = requeue_lookup(query->lookup, ISC_TRUE);
lookup->origin = search;
newlookup = requeue_lookup(oldlookup, ISC_TRUE);
newlookup->origin = search;
}
cancel_lookup(query->lookup);
cancel_lookup(oldlookup);
return (ISC_TRUE);
}
@@ -2153,7 +2160,7 @@ compute_cookie(unsigned char *cookie, size_t len) {
* well as the query structures and buffer space for the replies. If the
* server list is empty, clone it from the system default list.
*/
void
isc_boolean_t
setup_lookup(dig_lookup_t *lookup) {
isc_result_t result;
isc_uint32_t id;
@@ -2283,20 +2290,35 @@ setup_lookup(dig_lookup_t *lookup) {
if (lookup->trace && lookup->trace_root) {
dns_name_clone(dns_rootname, lookup->name);
} else {
dns_fixedname_t fixed;
dns_name_t *name;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
len = strlen(lookup->textname);
isc_buffer_init(&b, lookup->textname, len);
isc_buffer_add(&b, len);
result = dns_name_fromtext(lookup->name, &b,
lookup->oname, 0,
&lookup->namebuf);
}
if (result != ISC_R_SUCCESS) {
dns_message_puttempname(lookup->sendmsg,
&lookup->name);
dns_message_puttempname(lookup->sendmsg,
&lookup->oname);
fatal("'%s' is not in legal name syntax (%s)",
lookup->textname, isc_result_totext(result));
result = dns_name_fromtext(name, &b, NULL, 0, NULL);
if (result == ISC_R_SUCCESS &&
!dns_name_isabsolute(name))
result = dns_name_concatenate(name,
lookup->oname,
lookup->name,
&lookup->namebuf);
else if (result == ISC_R_SUCCESS)
result = dns_name_copy(name, lookup->name,
&lookup->namebuf);
if (result != ISC_R_SUCCESS) {
dns_message_puttempname(lookup->sendmsg,
&lookup->name);
dns_message_puttempname(lookup->sendmsg,
&lookup->oname);
if (result == DNS_R_NAMETOOLONG)
return (ISC_FALSE);
fatal("'%s' is not in legal name syntax (%s)",
lookup->textname,
isc_result_totext(result));
}
}
dns_message_puttempname(lookup->sendmsg, &lookup->oname);
} else
@@ -2591,6 +2613,7 @@ setup_lookup(dig_lookup_t *lookup) {
printf(";; QUERY SIZE: %u\n\n",
isc_buffer_usedlength(&lookup->renderbuf));
}
return (ISC_TRUE);
}
/*%
@@ -3794,7 +3817,7 @@ recv_done(isc_task_t *task, isc_event_t *event) {
if (!l->doing_xfr || l->xfr_q == query) {
if (msg->rcode == dns_rcode_nxdomain &&
(l->origin != NULL || l->need_search)) {
if (!next_origin(query) || showsearch) {
if (!next_origin(query->lookup) || showsearch) {
printmessage(query, msg, ISC_TRUE);
received(b->used, &sevent->address, query);
}

2
bin/dig/include/dig/dig.h
View File

@@ -323,7 +323,7 @@ debug(const char *format, ...) ISC_FORMAT_PRINTF(1, 2);
void
check_result(isc_result_t result, const char *msg);
void
isc_boolean_t
setup_lookup(dig_lookup_t *lookup);
void