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evdns: add descriptions for DNS_OPTION_*/DNS_OPTIONS_ALL

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(cherry picked from commit 3e0dc1a6ab4b7024b93dc44c1bb79df0ef637fc0)
This commit is contained in:
Azat Khuzhin 2019-04-01 01:40:18 +03:00
parent 22380996db
commit aa5a65d194
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1 changed files with 26 additions and 1 deletions
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27
include/event2/dns.h
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@ -179,11 +179,36 @@ extern "C" {
#define DNS_QUERY_NO_SEARCH 1
/* Allow searching */
#define DNS_OPTION_SEARCH 1
/* Parse "nameserver" and add default if no such section */
#define DNS_OPTION_NAMESERVERS 2
/* Parse additional options like:
* - timeout:
* - getaddrinfo-allow-skew:
* - max-timeouts:
* - max-inflight:
* - attempts:
* - randomize-case:
* - initial-probe-timeout:
*/
#define DNS_OPTION_MISC 4
/* Load hosts file (i.e. "/etc/hosts") */
#define DNS_OPTION_HOSTSFILE 8
#define DNS_OPTIONS_ALL 15
/**
* All above:
* - DNS_OPTION_SEARCH
* - DNS_OPTION_NAMESERVERS
* - DNS_OPTION_MISC
* - DNS_OPTION_HOSTSFILE
*/
#define DNS_OPTIONS_ALL ( \
DNS_OPTION_SEARCH | \
DNS_OPTION_NAMESERVERS | \
DNS_OPTION_MISC | \
DNS_OPTION_HOSTSFILE | \
0 \
)
/* Obsolete name for DNS_QUERY_NO_SEARCH */
#define DNS_NO_SEARCH DNS_QUERY_NO_SEARCH