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show name for a FORMERR DNS response

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This commit is contained in:
Igor Sysoev 2008-10-24 14:38:09 +00:00
parent 1c2bb210c1
commit 571a5e1512
1 changed files with 36 additions and 6 deletions
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42
src/core/ngx_resolver.c
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@ -956,8 +956,11 @@ ngx_resolver_process_response(ngx_resolver_t *r, u_char *buf, size_t n)
{
char *err;
size_t len;
ngx_uint_t i, ident, flags, code, nqs, nan, qtype, qclass;
ngx_uint_t i, times, ident, qident, flags, code, nqs, nan,
qtype, qclass;
ngx_queue_t *q;
ngx_resolver_qs_t *qs;
ngx_resolver_node_t *rn;
ngx_resolver_query_t *query;
if ((size_t) n < sizeof(ngx_resolver_query_t)) {
@ -985,11 +988,31 @@ ngx_resolver_process_response(ngx_resolver_t *r, u_char *buf, size_t n)
code = flags & 0x7f;
if (code == NGX_RESOLVE_FORMERR || code > NGX_RESOLVE_REFUSED) {
ngx_log_error(r->log_level, r->log, 0,
"DNS error (%ui: %s), query id:%ui",
code, ngx_resolver_strerror(code), ident);
return;
if (code == NGX_RESOLVE_FORMERR) {
times = 0;
for (q = ngx_queue_head(&r->name_resend_queue);
q != ngx_queue_sentinel(&r->name_resend_queue) || times++ < 100;
q = ngx_queue_next(q))
{
rn = ngx_queue_data(q, ngx_resolver_node_t, queue);
qident = (rn->query[0] << 8) + rn->query[1];
if (qident == ident) {
ngx_log_error(r->log_level, r->log, 0,
"DNS error (%ui: %s), query id:%ui, name:\"%*s\"",
code, ngx_resolver_strerror(code), ident,
rn->nlen, rn->name);
return;
}
}
goto dns_error;
}
if (code > NGX_RESOLVE_REFUSED) {
goto dns_error;
}
if (nqs != 1) {
@ -1069,6 +1092,13 @@ done:
ngx_log_error(r->log_level, r->log, 0, err);
return;
dns_error:
ngx_log_error(r->log_level, r->log, 0,
"DNS error (%ui: %s), query id:%ui",
code, ngx_resolver_strerror(code), ident);
return;
}