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fixed bug #48398 (dns: entries reused during found-callback could be aborted if ttl==0)

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goldsimon 2016-07-04 13:55:20 +02:00
parent 2e26fc9224
commit 2fdea8b79b
1 changed files with 7 additions and 4 deletions
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11
src/core/dns.c
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@ -1073,10 +1073,13 @@ dns_correct_response(u8_t idx, u32_t ttl)
if (entry->ttl == 0) { if (entry->ttl == 0) {
/* RFC 883, page 29: "Zero values are /* RFC 883, page 29: "Zero values are
interpreted to mean that the RR can only be used for the interpreted to mean that the RR can only be used for the
transaction in progress, and should not be cached." transaction in progress, and should not be cached."
-> flush this entry now */ -> flush this entry now */
entry->state = DNS_STATE_UNUSED; /* entry reused during callback? */
if (entry->state == DNS_STATE_DONE) {
entry->state = DNS_STATE_UNUSED;
}
} }
} }
/** /**