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ircd::net::dns: Optimize query w/ internal lookup priority when enabled by conf.

This commit is contained in:
Jason Volk 2023-02-06 11:58:48 -08:00
parent 9134684812
commit 86df5510d4
1 changed files with 20 additions and 0 deletions
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20
ircd/net_dns_netdb.cc
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@ -17,6 +17,7 @@ namespace ircd::net::dns
static bool netdb_ready;
extern conf::item<bool> netdb_enable;
extern conf::item<bool> netdb_internal;
extern const std::map<pair<string_view>, uint16_t> service_ports;
extern const std::map<pair<uint16_t, string_view>, string_view> service_names;
}
@ -55,6 +56,14 @@ ircd::net::dns::netdb_enable
{ "default", true },
};
[[gnu::visibility("internal")]]
decltype(ircd::net::dns::netdb_internal)
ircd::net::dns::netdb_internal
{
{ "name", "ircd.net.dns.netdb.internal" },
{ "default", true },
};
void
ircd::net::dns::init::service_init()
{
@ -115,6 +124,10 @@ try
thread_local struct ::servent res, *ent {nullptr};
thread_local char _name[32], _prot[32], buf[2048];
if(likely(netdb_internal))
if((res.s_port = _service_port(name, prot)))
return res.s_port;
const mods::ldso::exceptions enable {false};
const prof::syscall_usage_warning timer
{
@ -210,6 +223,13 @@ try
thread_local struct ::servent res, *ent {nullptr};
thread_local char _prot[32], buf[2048];
if(likely(netdb_internal))
{
string_view ret;
if((ret = strlcpy(out, _service_name(port, prot))))
return ret;
}
const mods::ldso::exceptions enable {false};
const prof::syscall_usage_warning timer
{