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Merge branch '792-bind9-doesn-t-tcp-retransmit' into 'master'

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Resolve "bind9 doesn't tcp retransmit"

Closes #792

See merge request isc-projects/bind9!1284
This commit is contained in:
Evan Hunt 2019-01-15 20:21:18 -05:00
commit 02497cf6d3
1 changed files with 9 additions and 0 deletions
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9
lib/dns/resolver.c
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@ -1919,6 +1919,15 @@ fctx_query(fetchctx_t *fctx, dns_adbaddrinfo_t *addrinfo,
srtt = addrinfo->srtt;
/*
* Allow an additional second for the kernel to resend the SYN (or
* SYN without ECN in the case of stupid firewalls blocking ECN
* negotiation) over the current RTT estimate.
*/
if ((options & DNS_FETCHOPT_TCP) != 0) {
srtt += 1000000;
}
/*
* A forwarder needs to make multiple queries. Give it at least
* a second to do these in.