mirror of
https://github.com/matrix-construct/construct
synced 2024-12-25 15:04:10 +01:00
596 lines
11 KiB
C++
596 lines
11 KiB
C++
// Matrix Construct
|
|
//
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
namespace ircd::net::dns::cache
|
|
{
|
|
static void handle(const m::event &, m::vm::eval &);
|
|
|
|
static bool put(const string_view &type, const string_view &state_key, const records &rrs);
|
|
static bool put(const string_view &type, const string_view &state_key, const uint &code, const string_view &msg);
|
|
|
|
extern const m::room::id::buf dns_room_id;
|
|
extern m::hookfn<m::vm::eval &> hook;
|
|
|
|
static void init(), fini();
|
|
}
|
|
|
|
ircd::mapi::header
|
|
IRCD_MODULE
|
|
{
|
|
"DNS cache using Matrix rooms.",
|
|
ircd::net::dns::cache::init,
|
|
ircd::net::dns::cache::fini,
|
|
};
|
|
|
|
decltype(ircd::net::dns::cache::dns_room_id)
|
|
ircd::net::dns::cache::dns_room_id
|
|
{
|
|
"dns", m::my_host()
|
|
};
|
|
|
|
decltype(ircd::net::dns::cache::hook)
|
|
ircd::net::dns::cache::hook
|
|
{
|
|
ircd::net::dns::cache::handle,
|
|
{
|
|
{ "_site", "vm.effect" },
|
|
{ "room_id", string_view{dns_room_id} },
|
|
}
|
|
};
|
|
|
|
void
|
|
ircd::net::dns::cache::init()
|
|
{
|
|
log::debug
|
|
{
|
|
"DNS cache room %s currently set.",
|
|
string_view{dns_room_id}
|
|
};
|
|
}
|
|
|
|
void
|
|
ircd::net::dns::cache::fini()
|
|
{
|
|
if(!waiting.empty())
|
|
log::warning
|
|
{
|
|
log, "Waiting for %zu unfinished cache operations.",
|
|
waiting.size(),
|
|
};
|
|
|
|
dock.wait([]
|
|
{
|
|
return waiting.empty();
|
|
});
|
|
}
|
|
|
|
bool
|
|
IRCD_MODULE_EXPORT
|
|
ircd::net::dns::cache::put(const hostport &hp,
|
|
const opts &opts,
|
|
const uint &code,
|
|
const string_view &msg)
|
|
{
|
|
char type_buf[64];
|
|
const string_view type
|
|
{
|
|
make_type(type_buf, opts.qtype)
|
|
};
|
|
|
|
char state_key_buf[m::event::STATE_KEY_MAX_SIZE];
|
|
const string_view &state_key
|
|
{
|
|
opts.qtype == 33?
|
|
make_SRV_key(state_key_buf, hp, opts):
|
|
host(hp)
|
|
};
|
|
|
|
return put(type, state_key, code, msg);
|
|
}
|
|
|
|
bool
|
|
IRCD_MODULE_EXPORT
|
|
ircd::net::dns::cache::put(const hostport &hp,
|
|
const opts &opts,
|
|
const records &rrs)
|
|
{
|
|
const auto &type_code
|
|
{
|
|
!rrs.empty()? rrs.at(0)->type : opts.qtype
|
|
};
|
|
|
|
char type_buf[48];
|
|
const string_view type
|
|
{
|
|
make_type(type_buf, type_code)
|
|
};
|
|
|
|
char state_key_buf[m::event::STATE_KEY_MAX_SIZE];
|
|
const string_view &state_key
|
|
{
|
|
opts.qtype == 33?
|
|
make_SRV_key(state_key_buf, hp, opts):
|
|
host(hp)
|
|
};
|
|
|
|
return put(type, state_key, rrs);
|
|
}
|
|
|
|
bool
|
|
ircd::net::dns::cache::put(const string_view &type,
|
|
const string_view &state_key,
|
|
const uint &code,
|
|
const string_view &msg)
|
|
try
|
|
{
|
|
char content_buf[1024];
|
|
json::stack out{content_buf};
|
|
json::stack::object content{out};
|
|
json::stack::array array
|
|
{
|
|
content, ""
|
|
};
|
|
|
|
json::stack::object rr0
|
|
{
|
|
array
|
|
};
|
|
|
|
json::stack::member
|
|
{
|
|
rr0, "errcode", lex_cast(code)
|
|
};
|
|
|
|
json::stack::member
|
|
{
|
|
rr0, "error", msg
|
|
};
|
|
|
|
json::stack::member
|
|
{
|
|
rr0, "ttl", json::value
|
|
{
|
|
code == 3?
|
|
long(seconds(nxdomain_ttl).count()):
|
|
long(seconds(error_ttl).count())
|
|
}
|
|
};
|
|
|
|
rr0.~object();
|
|
array.~array();
|
|
content.~object();
|
|
const m::room room
|
|
{
|
|
dns_room_id
|
|
};
|
|
|
|
if(unlikely(!exists(room)))
|
|
create(room, m::me(), "internal");
|
|
|
|
send(room, m::me(), type, state_key, json::object(out.completed()));
|
|
return true;
|
|
}
|
|
catch(const http::error &e)
|
|
{
|
|
const ctx::exception_handler eh;
|
|
log::error
|
|
{
|
|
log, "cache put (%s, %s) code:%u (%s) :%s %s",
|
|
type,
|
|
state_key,
|
|
code,
|
|
msg,
|
|
e.what(),
|
|
e.content,
|
|
};
|
|
|
|
const json::value error_value
|
|
{
|
|
json::object{e.content}
|
|
};
|
|
|
|
const json::value error_records{&error_value, 1};
|
|
const json::strung error{error_records};
|
|
waiter::call(rfc1035::qtype.at(lstrip(type, "ircd.dns.rrs.")), state_key, error);
|
|
return false;
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
const ctx::exception_handler eh;
|
|
log::error
|
|
{
|
|
log, "cache put (%s, %s) code:%u (%s) :%s",
|
|
type,
|
|
state_key,
|
|
code,
|
|
msg,
|
|
e.what()
|
|
};
|
|
|
|
const json::members error_object
|
|
{
|
|
{ "error", e.what() },
|
|
};
|
|
|
|
const json::value error_value{error_object};
|
|
const json::value error_records{&error_value, 1};
|
|
const json::strung error{error_records};
|
|
waiter::call(rfc1035::qtype.at(lstrip(type, "ircd.dns.rrs.")), state_key, error);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
ircd::net::dns::cache::put(const string_view &type,
|
|
const string_view &state_key,
|
|
const records &rrs)
|
|
try
|
|
{
|
|
const unique_buffer<mutable_buffer> buf
|
|
{
|
|
8_KiB
|
|
};
|
|
|
|
json::stack out{buf};
|
|
json::stack::object content{out};
|
|
json::stack::array array
|
|
{
|
|
content, ""
|
|
};
|
|
|
|
if(rrs.empty())
|
|
{
|
|
// Add one object to the array with nothing except a ttl indicating no
|
|
// records (and no error) so we can cache that for the ttl. We use the
|
|
// nxdomain ttl for this value.
|
|
json::stack::object rr0{array};
|
|
json::stack::member
|
|
{
|
|
rr0, "ttl", json::value
|
|
{
|
|
long(seconds(nxdomain_ttl).count())
|
|
}
|
|
};
|
|
}
|
|
else for(const auto &record : rrs)
|
|
{
|
|
switch(record->type)
|
|
{
|
|
case 1: // A
|
|
{
|
|
json::stack::object object{array};
|
|
dynamic_cast<const rfc1035::record::A *>(record)->append(object);
|
|
continue;
|
|
}
|
|
|
|
case 5: // CNAME
|
|
{
|
|
json::stack::object object{array};
|
|
dynamic_cast<const rfc1035::record::CNAME *>(record)->append(object);
|
|
continue;
|
|
}
|
|
|
|
case 28: // AAAA
|
|
{
|
|
json::stack::object object{array};
|
|
dynamic_cast<const rfc1035::record::AAAA *>(record)->append(object);
|
|
continue;
|
|
}
|
|
|
|
case 33: // SRV
|
|
{
|
|
json::stack::object object{array};
|
|
dynamic_cast<const rfc1035::record::SRV *>(record)->append(object);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
array.~array();
|
|
content.~object();
|
|
const m::room room
|
|
{
|
|
dns_room_id
|
|
};
|
|
|
|
if(unlikely(!exists(room)))
|
|
create(room, m::me(), "internal");
|
|
|
|
send(room, m::me(), type, state_key, json::object{out.completed()});
|
|
return true;
|
|
}
|
|
catch(const http::error &e)
|
|
{
|
|
const ctx::exception_handler eh;
|
|
log::error
|
|
{
|
|
log, "cache put (%s, %s) rrs:%zu :%s %s",
|
|
type,
|
|
state_key,
|
|
rrs.size(),
|
|
e.what(),
|
|
e.content,
|
|
};
|
|
|
|
const json::value error_value
|
|
{
|
|
json::object{e.content}
|
|
};
|
|
|
|
const json::value error_records{&error_value, 1};
|
|
const json::strung error{error_records};
|
|
waiter::call(rfc1035::qtype.at(lstrip(type, "ircd.dns.rrs.")), state_key, error);
|
|
return false;
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
const ctx::exception_handler eh;
|
|
log::error
|
|
{
|
|
log, "cache put (%s, %s) rrs:%zu :%s",
|
|
type,
|
|
state_key,
|
|
rrs.size(),
|
|
e.what(),
|
|
};
|
|
|
|
const json::members error_object
|
|
{
|
|
{ "error", e.what() },
|
|
};
|
|
|
|
const json::value error_value{error_object};
|
|
const json::value error_records{&error_value, 1};
|
|
const json::strung error{error_records};
|
|
waiter::call(rfc1035::qtype.at(lstrip(type, "ircd.dns.rrs.")), state_key, error);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
IRCD_MODULE_EXPORT
|
|
ircd::net::dns::cache::get(const hostport &hp,
|
|
const opts &opts,
|
|
const callback &closure)
|
|
{
|
|
char type_buf[48];
|
|
const string_view type
|
|
{
|
|
make_type(type_buf, opts.qtype)
|
|
};
|
|
|
|
char state_key_buf[rfc1035::NAME_BUFSIZE * 2];
|
|
const string_view &state_key
|
|
{
|
|
opts.qtype == 33?
|
|
make_SRV_key(state_key_buf, hp, opts):
|
|
host(hp)
|
|
};
|
|
|
|
const m::room::state state
|
|
{
|
|
dns_room_id
|
|
};
|
|
|
|
const m::event::idx &event_idx
|
|
{
|
|
state.get(std::nothrow, type, state_key)
|
|
};
|
|
|
|
if(!event_idx)
|
|
return false;
|
|
|
|
time_t origin_server_ts;
|
|
if(!m::get<time_t>(event_idx, "origin_server_ts", origin_server_ts))
|
|
return false;
|
|
|
|
bool ret{false};
|
|
const time_t ts{origin_server_ts / 1000L};
|
|
m::get(std::nothrow, event_idx, "content", [&hp, &closure, &ret, &ts]
|
|
(const json::object &content)
|
|
{
|
|
const json::array &rrs
|
|
{
|
|
content.get("")
|
|
};
|
|
|
|
// If all records are expired then skip; otherwise since this closure
|
|
// expects a single array we reveal both expired and valid records.
|
|
ret = !std::all_of(begin(rrs), end(rrs), [&ts]
|
|
(const json::object &rr)
|
|
{
|
|
return expired(rr, ts);
|
|
});
|
|
|
|
if(ret && closure)
|
|
closure(hp, rrs);
|
|
});
|
|
|
|
return ret;
|
|
}
|
|
|
|
bool
|
|
IRCD_MODULE_EXPORT
|
|
ircd::net::dns::cache::for_each(const hostport &hp,
|
|
const opts &opts,
|
|
const closure &closure)
|
|
{
|
|
char type_buf[48];
|
|
const string_view type
|
|
{
|
|
make_type(type_buf, opts.qtype)
|
|
};
|
|
|
|
char state_key_buf[rfc1035::NAME_BUFSIZE * 2];
|
|
const string_view &state_key
|
|
{
|
|
opts.qtype == 33?
|
|
make_SRV_key(state_key_buf, hp, opts):
|
|
host(hp)
|
|
};
|
|
|
|
const m::room::state state
|
|
{
|
|
dns_room_id
|
|
};
|
|
|
|
const m::event::idx &event_idx
|
|
{
|
|
state.get(std::nothrow, type, state_key)
|
|
};
|
|
|
|
if(!event_idx)
|
|
return false;
|
|
|
|
time_t origin_server_ts;
|
|
if(!m::get<time_t>(event_idx, "origin_server_ts", origin_server_ts))
|
|
return false;
|
|
|
|
bool ret{true};
|
|
const time_t ts{origin_server_ts / 1000L};
|
|
m::get(std::nothrow, event_idx, "content", [&state_key, &closure, &ret, &ts]
|
|
(const json::object &content)
|
|
{
|
|
for(const json::object rr : json::array(content.get("")))
|
|
{
|
|
if(expired(rr, ts))
|
|
continue;
|
|
|
|
if(!(ret = closure(state_key, rr)))
|
|
break;
|
|
}
|
|
});
|
|
|
|
return ret;
|
|
}
|
|
|
|
bool
|
|
IRCD_MODULE_EXPORT
|
|
ircd::net::dns::cache::for_each(const string_view &type,
|
|
const closure &closure)
|
|
{
|
|
char type_buf[48];
|
|
const string_view full_type
|
|
{
|
|
make_type(type_buf, type)
|
|
};
|
|
|
|
const m::room::state state
|
|
{
|
|
dns_room_id
|
|
};
|
|
|
|
return state.for_each(full_type, [&closure]
|
|
(const string_view &, const string_view &state_key, const m::event::idx &event_idx)
|
|
{
|
|
time_t origin_server_ts;
|
|
if(!m::get<time_t>(event_idx, "origin_server_ts", origin_server_ts))
|
|
return true;
|
|
|
|
bool ret{true};
|
|
const time_t ts{origin_server_ts / 1000L};
|
|
m::get(std::nothrow, event_idx, "content", [&state_key, &closure, &ret, &ts]
|
|
(const json::object &content)
|
|
{
|
|
for(const json::object rr : json::array(content.get("")))
|
|
{
|
|
if(expired(rr, ts))
|
|
continue;
|
|
|
|
if(!(ret = closure(state_key, rr)))
|
|
break;
|
|
}
|
|
});
|
|
|
|
return ret;
|
|
});
|
|
}
|
|
|
|
void
|
|
ircd::net::dns::cache::handle(const m::event &event,
|
|
m::vm::eval &eval)
|
|
try
|
|
{
|
|
const string_view &type
|
|
{
|
|
json::get<"type"_>(event)
|
|
};
|
|
|
|
if(!startswith(type, "ircd.dns.rrs."))
|
|
return;
|
|
|
|
const string_view &state_key
|
|
{
|
|
json::get<"state_key"_>(event)
|
|
};
|
|
|
|
const json::array &rrs
|
|
{
|
|
json::get<"content"_>(event).get("")
|
|
};
|
|
|
|
waiter::call(rfc1035::qtype.at(lstrip(type, "ircd.dns.rrs.")), state_key, rrs);
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
log::critical
|
|
{
|
|
log, "handle_cached() :%s", e.what()
|
|
};
|
|
}
|
|
|
|
//
|
|
// cache room creation
|
|
//
|
|
|
|
namespace ircd::net::dns::cache
|
|
{
|
|
static void create_room();
|
|
|
|
extern m::hookfn<m::vm::eval &> create_room_hook;
|
|
}
|
|
|
|
decltype(ircd::net::dns::cache::create_room_hook)
|
|
ircd::net::dns::cache::create_room_hook
|
|
{
|
|
{
|
|
{ "_site", "vm.effect" },
|
|
{ "room_id", "!ircd" },
|
|
{ "type", "m.room.create" },
|
|
},
|
|
|
|
[](const m::event &, m::vm::eval &)
|
|
{
|
|
create_room();
|
|
}
|
|
};
|
|
|
|
void
|
|
ircd::net::dns::cache::create_room()
|
|
try
|
|
{
|
|
const m::room room
|
|
{
|
|
m::create(dns_room_id, m::me(), "internal")
|
|
};
|
|
|
|
log::debug
|
|
{
|
|
m::log, "Created '%s' for the DNS cache module.",
|
|
string_view{dns_room_id}
|
|
};
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
log::critical
|
|
{
|
|
m::log, "Creating the '%s' room failed :%s",
|
|
string_view{dns_room_id},
|
|
e.what()
|
|
};
|
|
}
|