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-rw-r--r--lib/kernel/src/inet_res.erl180
1 files changed, 177 insertions, 3 deletions
diff --git a/lib/kernel/src/inet_res.erl b/lib/kernel/src/inet_res.erl
index 93563c6011..2276ddcd08 100644
--- a/lib/kernel/src/inet_res.erl
+++ b/lib/kernel/src/inet_res.erl
@@ -47,18 +47,93 @@
false -> ok
end).
+-type res_option() ::
+ {alt_nameservers, [nameserver()]}
+ | {edns, 0 | false}
+ | {inet6, boolean()}
+ | {nameservers, [nameserver()]}
+ | {recurse, boolean()}
+ | {retry, integer()}
+ | {timeout, integer()}
+ | {udp_payload_size, integer()}
+ | {usevc, boolean()}.
+
+-type nameserver() :: {inet:ip_address(), Port :: 1..65535}.
+
+-type res_error() :: formerr | qfmterror | servfail | nxdomain |
+ notimp | refused | badvers | timeout.
+
+-type dns_name() :: string().
+
+-type rr_type() :: a | aaaa | cname | gid | hinfo | ns | mb | md | mg | mf
+ | minfo | mx | naptr | null | ptr | soa | spf | srv | txt
+ | uid | uinfo | unspec | wks.
+
+-type dns_class() :: in | chaos | hs | any.
+
+-opaque dns_msg() :: term().
+
+-type dns_data() ::
+ dns_name()
+ | inet:ip4_address()
+ | inet:ip6_address()
+ | {MName :: dns_name(),
+ RName :: dns_name(),
+ Serial :: integer(),
+ Refresh :: integer(),
+ Retry :: integer(),
+ Expiry :: integer(),
+ Minimum :: integer()}
+ | {inet:ip4_address(), Proto :: integer(), BitMap :: binary()}
+ | {CpuString :: string(), OsString :: string()}
+ | {RM :: dns_name(), EM :: dns_name()}
+ | {Prio :: integer(), dns_name()}
+ | {Prio :: integer(),Weight :: integer(),Port :: integer(),dns_name()}
+ | {Order :: integer(),Preference :: integer(),Flags :: string(),
+ Services :: string(),Regexp :: string(), dns_name()}
+ | [string()]
+ | binary().
+
%% --------------------------------------------------------------------------
%% resolve:
%%
%% Nameserver query
%%
+-spec resolve(Name, Class, Type) -> {ok, dns_msg()} | Error when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Error :: {error, Reason} | {error,{Reason,dns_msg()}},
+ Reason :: inet:posix() | res_error().
+
resolve(Name, Class, Type) ->
resolve(Name, Class, Type, [], infinity).
+-spec resolve(Name, Class, Type, Opts) ->
+ {ok, dns_msg()} | Error when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Opts :: [Opt],
+ Opt :: res_option() | verbose | atom(),
+ Error :: {error, Reason} | {error,{Reason,dns_msg()}},
+ Reason :: inet:posix() | res_error().
+
resolve(Name, Class, Type, Opts) ->
resolve(Name, Class, Type, Opts, infinity).
+-spec resolve(Name, Class, Type, Opts, Timeout) ->
+ {ok, dns_msg()} | Error when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Opts :: [Opt],
+ Opt :: res_option() | verbose | atom(),
+ Timeout :: timeout(),
+ Error :: {error, Reason} | {error,{Reason,dns_msg()}},
+ Reason :: inet:posix() | res_error().
+
resolve(Name, Class, Type, Opts, Timeout) ->
case nsdname(Name) of
{ok, Nm} ->
@@ -76,12 +151,30 @@ resolve(Name, Class, Type, Opts, Timeout) ->
%% Convenience wrapper to resolve/3,4,5 that filters out all answer data
%% fields of the class and type asked for.
+-spec lookup(Name, Class, Type) -> [dns_data()] when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type().
+
lookup(Name, Class, Type) ->
lookup(Name, Class, Type, []).
+-spec lookup(Name, Class, Type, Opts) -> [dns_data()] when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Opts :: [res_option() | verbose].
+
lookup(Name, Class, Type, Opts) ->
lookup(Name, Class, Type, Opts, infinity).
+-spec lookup(Name, Class, Type, Opts, Timeout) -> [dns_data()] when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Opts :: [res_option() | verbose],
+ Timeout :: timeout().
+
lookup(Name, Class, Type, Opts, Timeout) ->
lookup_filter(resolve(Name, Class, Type, Opts, Timeout),
Class, Type).
@@ -101,17 +194,55 @@ lookup_filter({error,_}, _, _) -> [].
%%
%% To be deprecated
+-spec nslookup(Name, Class, Type) -> {ok, dns_msg()} | {error, Reason} when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Reason :: inet:posix() | res_error().
+
nslookup(Name, Class, Type) ->
do_nslookup(Name, Class, Type, [], infinity).
+-spec nslookup(Name, Class, Type, Timeout) ->
+ {ok, dns_msg()} | {error, Reason} when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Timeout :: timeout(),
+ Reason :: inet:posix() | res_error();
+ (Name, Class, Type, Nameservers) ->
+ {ok, dns_msg()} | {error, Reason} when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Nameservers :: [nameserver()],
+ Reason :: inet:posix() | res_error().
+
nslookup(Name, Class, Type, Timeout) when is_integer(Timeout), Timeout >= 0 ->
do_nslookup(Name, Class, Type, [], Timeout);
nslookup(Name, Class, Type, NSs) -> % For backwards compatibility
nnslookup(Name, Class, Type, NSs). % with OTP R6B only
+-spec nnslookup(Name, Class, Type, Nameservers) ->
+ {ok, dns_msg()} | {error, Reason} when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Nameservers :: [nameserver()],
+ Reason :: inet:posix().
+
nnslookup(Name, Class, Type, NSs) ->
nnslookup(Name, Class, Type, NSs, infinity).
+-spec nnslookup(Name, Class, Type, Nameservers, Timeout) ->
+ {ok, dns_msg()} | {error, Reason} when
+ Name :: dns_name() | inet:ip_address(),
+ Class :: dns_class(),
+ Type :: rr_type(),
+ Timeout :: timeout(),
+ Nameservers :: [nameserver()],
+ Reason :: inet:posix().
+
nnslookup(Name, Class, Type, NSs, Timeout) ->
do_nslookup(Name, Class, Type, [{nameservers,NSs}], Timeout).
@@ -192,8 +323,19 @@ make_options(Opts, [Name|Names]) ->
%%
%% --------------------------------------------------------------------------
+-spec gethostbyaddr(Address) -> {ok, Hostent} | {error, Reason} when
+ Address :: inet:ip_address(),
+ Hostent :: inet:hostent(),
+ Reason :: inet:posix() | res_error().
+
gethostbyaddr(IP) -> gethostbyaddr_tm(IP,false).
+-spec gethostbyaddr(Address, Timeout) -> {ok, Hostent} | {error, Reason} when
+ Address :: inet:ip_address(),
+ Timeout :: timeout(),
+ Hostent :: inet:hostent(),
+ Reason :: inet:posix() | res_error().
+
gethostbyaddr(IP,Timeout) ->
Timer = inet:start_timer(Timeout),
Res = gethostbyaddr_tm(IP,Timer),
@@ -249,6 +391,11 @@ res_gethostbyaddr(Addr, IP, Timer) ->
%% Caches the answer.
%% --------------------------------------------------------------------------
+-spec gethostbyname(Name) -> {ok, Hostent} | {error, Reason} when
+ Name :: dns_name(),
+ Hostent :: inet:hostent(),
+ Reason :: inet:posix() | res_error().
+
gethostbyname(Name) ->
case inet_db:res_option(inet6) of
true ->
@@ -257,9 +404,23 @@ gethostbyname(Name) ->
gethostbyname_tm(Name, inet, false)
end.
+-spec gethostbyname(Name, Family) -> {ok, Hostent} | {error, Reason} when
+ Name :: dns_name(),
+ Hostent :: inet:hostent(),
+ Family :: inet:family_option(),
+ Reason :: inet:posix() | res_error().
+
gethostbyname(Name,Family) ->
gethostbyname_tm(Name,Family,false).
+-spec gethostbyname(Name, Family, Timeout) ->
+ {ok, Hostent} | {error, Reason} when
+ Name :: dns_name(),
+ Hostent :: inet:hostent(),
+ Timeout :: timeout(),
+ Family :: inet:family_option(),
+ Reason :: inet:posix() | res_error().
+
gethostbyname(Name,Family,Timeout) ->
Timer = inet:start_timer(Timeout),
Res = gethostbyname_tm(Name,Family,Timer),
@@ -298,14 +459,27 @@ gethostbyname_tm(_Name, _Family, _Timer) ->
%%
%% getbyname(domain_name(), Type) => {ok, hostent()} | {error, Reason}
%%
-%% where domain_name() is domain string or atom and Type is ?S_A, ?S_MX ...
+%% where domain_name() is domain string and Type is ?S_A, ?S_MX ...
%%
%% Caches the answer.
%% --------------------------------------------------------------------------
+-spec getbyname(Name, Type) -> {ok, Hostent} | {error, Reason} when
+ Name :: dns_name(),
+ Type :: rr_type(),
+ Hostent :: inet:hostent(),
+ Reason :: inet:posix() | res_error().
+
getbyname(Name, Type) ->
getbyname_tm(Name,Type,false).
+-spec getbyname(Name, Type, Timeout) -> {ok, Hostent} | {error, Reason} when
+ Name :: dns_name(),
+ Type :: rr_type(),
+ Timeout :: timeout(),
+ Hostent :: inet:hostent(),
+ Reason :: inet:posix() | res_error().
+
getbyname(Name, Type, Timeout) ->
Timer = inet:start_timer(Timeout),
Res = getbyname_tm(Name, Type, Timer),
@@ -698,7 +872,7 @@ query_ns(S0, Id, Buffer, IP, Port, Timer, Retry, I,
end
end.
-query_udp(_S, _Id, _Buffer, _IP, _Port, 0, Verbose) ->
+query_udp(_S, _Id, _Buffer, _IP, _Port, 0, _Verbose) ->
timeout;
query_udp(S, Id, Buffer, IP, Port, Timeout, Verbose) ->
?verbose(Verbose, "Try UDP server : ~p:~p (timeout=~w)\n",
@@ -734,7 +908,7 @@ query_udp(S, Id, Buffer, IP, Port, Timeout, Verbose) ->
{error,econnrefused}
end.
-query_tcp(0, _Id, _Buffer, _IP, _Port, Verbose) ->
+query_tcp(0, _Id, _Buffer, _IP, _Port, _Verbose) ->
timeout;
query_tcp(Timeout, Id, Buffer, IP, Port, Verbose) ->
?verbose(Verbose, "Try TCP server : ~p:~p (timeout=~w)\n",
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 14:40:23 +0000