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authorRaimo Niskanen <[email protected]>2010-11-12 10:14:18 +0100
committerRaimo Niskanen <[email protected]>2010-11-12 10:14:18 +0100
commit7edc140cb952137672e82f7dc8d7f100660d86f5 (patch)
tree51c603e06919ada93997015d9d3c05ab3e264a7d /erts/preloaded/src/prim_inet.erl
parentffbde437305a5fe7bd48786d935ed01c1c42a0fa (diff)
parentd5c04534c1a04701493c28ff24d7040cc513515c (diff)
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Merge branch 'raimo/inet-getifaddrs/OTP-8926' into dev
* raimo/inet-getifaddrs/OTP-8926: Write documentation Delete decommented code Add testcase Implement inet:getifaddrs/0 on Windows Implement basic inet:getifaddrs/0 Fix building error of SCTP in FreeBSD 7.1 and later
Diffstat (limited to 'erts/preloaded/src/prim_inet.erl')
-rw-r--r--erts/preloaded/src/prim_inet.erl250
1 files changed, 230 insertions, 20 deletions
diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl
index 91d39c6a73..446656e45f 100644
--- a/erts/preloaded/src/prim_inet.erl
+++ b/erts/preloaded/src/prim_inet.erl
@@ -37,7 +37,7 @@
-export([setopt/3, setopts/2, getopt/2, getopts/2, is_sockopt_val/2]).
-export([chgopt/3, chgopts/2]).
-export([getstat/2, getfd/1, getindex/1, getstatus/1, gettype/1,
- getiflist/1, ifget/3, ifset/3,
+ getifaddrs/1, getiflist/1, ifget/3, ifset/3,
gethostname/1]).
-export([getservbyname/3, getservbyport/3]).
-export([peername/1, setpeername/2]).
@@ -216,9 +216,10 @@ bindx(S, AddFlag, Addrs) ->
sctp ->
%% Really multi-homed "bindx". Stringified args:
%% [AddFlag, (Port, IP)+]:
- Args = ?int8(AddFlag) ++
- lists:concat([?int16(Port)++ip_to_bytes(IP) ||
- {IP, Port} <- Addrs]),
+ Args =
+ [?int8(AddFlag)|
+ [[?int16(Port)|ip_to_bytes(IP)] ||
+ {IP, Port} <- Addrs]],
case ctl_cmd(S, ?SCTP_REQ_BINDX, Args) of
{ok,_} -> {ok, S};
Error -> Error
@@ -623,7 +624,7 @@ chgopt(S, Opt, Value) when is_port(S) ->
chgopts(S, [{Opt,Value}]).
chgopts(S, Opts) when is_port(S), is_list(Opts) ->
- case inet:getopts(S, need_template(Opts)) of
+ case getopts(S, need_template(Opts)) of
{ok,Templates} ->
try merge_options(Opts, Templates) of
NewOpts ->
@@ -636,7 +637,94 @@ chgopts(S, Opts) when is_port(S), is_list(Opts) ->
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
-%% IFLIST(insock()) -> {ok,IfNameList} | {error, Reason}
+%% getifaddrs(insock()) -> {ok,IfAddrsList} | {error, Reason}
+%%
+%% IfAddrsList = [{Name,[Opts]}]
+%% Name = string()
+%% Opts = {flags,[Flag]} | {addr,Addr} | {netmask,Addr} | {broadaddr,Addr}
+%% | {dstaddr,Addr} | {hwaddr,HwAddr} | {mtu,integer()}
+%% Flag = up | broadcast | loopback | running | multicast
+%% Addr = ipv4addr() | ipv6addr()
+%% HwAddr = ethernet_addr()
+%%
+%% get interface name and addresses list
+%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+getifaddrs(S) when is_port(S) ->
+ case ctl_cmd(S, ?INET_REQ_GETIFADDRS, []) of
+ {ok, Data} ->
+ {ok, comp_ifaddrs(build_ifaddrs(Data), ktree_empty())};
+ {error,enotsup} ->
+ case getiflist(S) of
+ {ok, IFs} ->
+ {ok, getifaddrs_ifget(S, IFs)};
+ Err1 -> Err1
+ end;
+ Err2 -> Err2
+ end.
+
+%% Restructure interface properties per interface and remove duplicates
+
+comp_ifaddrs([{If,Opts}|IfOpts], T) ->
+ case ktree_is_defined(If, T) of
+ true ->
+ OptSet = comp_ifaddrs_add(ktree_get(If, T), Opts),
+ comp_ifaddrs(IfOpts, ktree_update(If, OptSet, T));
+ false ->
+ OptSet = comp_ifaddrs_add(ktree_empty(), Opts),
+ comp_ifaddrs(IfOpts, ktree_insert(If, OptSet, T))
+ end;
+comp_ifaddrs([], T) ->
+ [{If,ktree_keys(ktree_get(If, T))} || If <- ktree_keys(T)].
+
+comp_ifaddrs_add(OptSet, [Opt|Opts]) ->
+ case ktree_is_defined(Opt, OptSet) of
+ true
+ when element(1, Opt) =:= flags;
+ element(1, Opt) =:= hwaddr ->
+ comp_ifaddrs_add(OptSet, Opts);
+ _ ->
+ comp_ifaddrs_add(ktree_insert(Opt, undefined, OptSet), Opts)
+ end;
+comp_ifaddrs_add(OptSet, []) -> OptSet.
+
+%% Legacy emulation of getifaddrs
+
+getifaddrs_ifget(_, []) -> [];
+getifaddrs_ifget(S, [IF|IFs]) ->
+ case ifget(S, IF, [flags]) of
+ {ok,[{flags,Flags}]=FlagsVals} ->
+ BroadOpts =
+ case member(broadcast, Flags) of
+ true ->
+ [broadaddr,hwaddr];
+ false ->
+ [hwaddr]
+ end,
+ P2POpts =
+ case member(pointtopoint, Flags) of
+ true ->
+ [dstaddr|BroadOpts];
+ false ->
+ BroadOpts
+ end,
+ getifaddrs_ifget(S, IFs, IF, FlagsVals, [addr,netmask|P2POpts]);
+ _ ->
+ getifaddrs_ifget(S, IFs, IF, [], [addr,netmask,hwaddr])
+ end.
+
+getifaddrs_ifget(S, IFs, IF, FlagsVals, Opts) ->
+ OptVals =
+ case ifget(S, IF, Opts) of
+ {ok,OVs} -> OVs;
+ _ -> []
+ end,
+ [{IF,FlagsVals++OptVals}|getifaddrs_ifget(S, IFs)].
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%
+%% getiflist(insock()) -> {ok,IfNameList} | {error, Reason}
%%
%% get interface name list
%%
@@ -1325,6 +1413,19 @@ type_value_2({enum,List}, Enum) ->
{value,_} -> true;
false -> false
end;
+type_value_2(sockaddr, Addr) ->
+ case Addr of
+ any -> true;
+ loopback -> true;
+ {A,B,C,D} when ?ip(A,B,C,D) -> true;
+ {A,B,C,D,E,F,G,H} when ?ip6(A,B,C,D,E,F,G,H) -> true;
+ _ -> false
+ end;
+type_value_2(linkaddr, Addr) when is_list(Addr) ->
+ case len(Addr, 32768) of
+ undefined -> false;
+ _ -> true
+ end;
type_value_2({bitenumlist,List}, EnumList) ->
case enum_vals(EnumList, List) of
Ls when is_list(Ls) -> true;
@@ -1413,14 +1514,21 @@ enc_value_2(addr, {any,Port}) ->
[?INET_AF_ANY|?int16(Port)];
enc_value_2(addr, {loopback,Port}) ->
[?INET_AF_LOOPBACK|?int16(Port)];
-enc_value_2(addr, {IP,Port}) ->
- case tuple_size(IP) of
- 4 ->
- [?INET_AF_INET,?int16(Port)|ip4_to_bytes(IP)];
- 8 ->
- [?INET_AF_INET6,?int16(Port)|ip6_to_bytes(IP)]
- end;
+enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 4 ->
+ [?INET_AF_INET,?int16(Port)|ip4_to_bytes(IP)];
+enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 8 ->
+ [?INET_AF_INET6,?int16(Port)|ip6_to_bytes(IP)];
enc_value_2(ether, [X1,X2,X3,X4,X5,X6]) -> [X1,X2,X3,X4,X5,X6];
+enc_value_2(sockaddr, any) ->
+ [?INET_AF_ANY];
+enc_value_2(sockaddr, loopback) ->
+ [?INET_AF_LOOPBACK];
+enc_value_2(sockaddr, IP) when tuple_size(IP) =:= 4 ->
+ [?INET_AF_INET|ip4_to_bytes(IP)];
+enc_value_2(sockaddr, IP) when tuple_size(IP) =:= 8 ->
+ [?INET_AF_INET6|ip6_to_bytes(IP)];
+enc_value_2(linkaddr, Linkaddr) ->
+ [?int16(length(Linkaddr)),Linkaddr];
enc_value_2(sctp_assoc_id, Val) -> ?int32(Val);
%% enc_value_2(sctp_assoc_id, Bin) -> [byte_size(Bin),Bin];
enc_value_2({enum,List}, Enum) ->
@@ -1465,6 +1573,10 @@ dec_value(time, [X3,X2,X1,X0|T]) ->
end;
dec_value(ip, [A,B,C,D|T]) -> {{A,B,C,D}, T};
dec_value(ether,[X1,X2,X3,X4,X5,X6|T]) -> {[X1,X2,X3,X4,X5,X6],T};
+dec_value(sockaddr, [X|T]) ->
+ get_ip(X, T);
+dec_value(linkaddr, [X1,X0|T]) ->
+ split(?i16(X1,X0), T);
dec_value({enum,List}, [X3,X2,X1,X0|T]) ->
Val = ?i32(X3,X2,X1,X0),
case enum_name(Val, List) of
@@ -1480,7 +1592,7 @@ dec_value({bitenumlist,List}, [X3,X2,X1,X0|T]) ->
%% {enum_names(Val, List), T};
dec_value(binary,[L0,L1,L2,L3|List]) ->
Len = ?i32(L0,L1,L2,L3),
- {X,T}=lists:split(Len,List),
+ {X,T}=split(Len,List),
{list_to_binary(X),T};
dec_value(Types, List) when is_tuple(Types) ->
{L,T} = dec_value_tuple(Types, List, 1, []),
@@ -1495,7 +1607,7 @@ dec_value_tuple(Types, List, N, Acc)
{Term,Tail} = dec_value(element(N, Types), List),
dec_value_tuple(Types, Tail, N+1, [Term|Acc]);
dec_value_tuple(_, List, _, Acc) ->
- {lists:reverse(Acc),List}.
+ {rev(Acc),List}.
borlist([V|Vs], Value) ->
borlist(Vs, V bor Value);
@@ -1702,11 +1814,11 @@ merge_fields(_, _, _) -> [].
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-type_ifopt(addr) -> ip;
-type_ifopt(broadaddr) -> ip;
-type_ifopt(dstaddr) -> ip;
+type_ifopt(addr) -> sockaddr;
+type_ifopt(broadaddr) -> sockaddr;
+type_ifopt(dstaddr) -> sockaddr;
type_ifopt(mtu) -> int;
-type_ifopt(netmask) -> ip;
+type_ifopt(netmask) -> sockaddr;
type_ifopt(flags) ->
{bitenumlist,
[{up, ?INET_IFF_UP},
@@ -1718,7 +1830,7 @@ type_ifopt(flags) ->
{no_pointtopoint, ?INET_IFF_NPOINTTOPOINT},
{running, ?INET_IFF_RUNNING},
{multicast, ?INET_IFF_MULTICAST}]};
-type_ifopt(hwaddr) -> ether;
+type_ifopt(hwaddr) -> linkaddr;
type_ifopt(Opt) when is_atom(Opt) -> undefined.
enc_ifopt(addr) -> ?INET_IFOPT_ADDR;
@@ -1903,6 +2015,30 @@ encode_ifname(Name) ->
if N > 255 -> {error, einval};
true -> {ok,[N | Name]}
end.
+
+build_ifaddrs(Cs) ->
+ build_ifaddrs(Cs, []).
+%%
+build_ifaddrs([], []) ->
+ [];
+build_ifaddrs([0|Cs], Acc) ->
+ Name = utf8_to_characters(rev(Acc)),
+ {Opts,Rest} = build_ifaddrs_opts(Cs, []),
+ [{Name,Opts}|build_ifaddrs(Rest)];
+build_ifaddrs([C|Cs], Acc) ->
+ build_ifaddrs(Cs, [C|Acc]).
+
+build_ifaddrs_opts([0|Cs], Acc) ->
+ {rev(Acc),Cs};
+build_ifaddrs_opts([C|Cs]=CCs, Acc) ->
+ case dec_ifopt(C) of
+ undefined ->
+ erlang:error(badarg, [CCs,Acc]);
+ Opt ->
+ Type = type_ifopt(Opt),
+ {Val,Rest} = dec_value(Type, Cs),
+ build_ifaddrs_opts(Rest, [{Opt,Val}|Acc])
+ end.
build_iflist(Cs) ->
build_iflist(Cs, [], []).
@@ -1927,6 +2063,80 @@ rev(L) -> rev(L,[]).
rev([C|L],Acc) -> rev(L,[C|Acc]);
rev([],Acc) -> Acc.
+split(N, L) -> split(N, L, []).
+split(0, L, R) when is_list(L) -> {rev(R),L};
+split(N, [H|T], R) when is_integer(N), N > 0 -> split(N-1, T, [H|R]).
+
+len(L, N) -> len(L, N, 0).
+len([], N, C) when is_integer(N), N >= 0 -> C;
+len(L, 0, _) when is_list(L) -> undefined;
+len([_|L], N, C) when is_integer(N), N >= 0 -> len(L, N-1, C+1).
+
+member(X, [X|_]) -> true;
+member(X, [_|Xs]) -> member(X, Xs);
+member(_, []) -> false.
+
+
+
+%% Lookup tree that keeps key insert order
+
+ktree_empty() -> {[],tree()}.
+ktree_is_defined(Key, {_,T}) -> tree(T, Key, is_defined).
+ktree_get(Key, {_,T}) -> tree(T, Key, get).
+ktree_insert(Key, V, {Keys,T}) -> {[Key|Keys],tree(T, Key, {insert,V})}.
+ktree_update(Key, V, {Keys,T}) -> {Keys,tree(T, Key, {update,V})}.
+ktree_keys({Keys,_}) -> rev(Keys).
+
+%% Simple lookup tree. Hash the key to get statistical balance.
+%% Key is matched equal, not compared equal.
+
+tree() -> nil.
+tree(T, Key, Op) -> tree(T, Key, Op, erlang:phash2(Key)).
+
+tree(nil, _, is_defined, _) -> false;
+tree(nil, K, {insert,V}, _) -> {K,V,nil,nil};
+tree({K,_,_,_}, K, is_defined, _) -> true;
+tree({K,V,_,_}, K, get, _) -> V;
+tree({K,_,L,R}, K, {update,V}, _) -> {K,V,L,R};
+tree({K0,V0,L,R}, K, Op, H) ->
+ H0 = erlang:phash2(K0),
+ if H0 < H; H0 =:= H, K0 < K ->
+ if is_tuple(Op) ->
+ {K0,V0,tree(L, K, Op, H),R};
+ true ->
+ tree(L, K, Op, H)
+ end;
+ true ->
+ if is_tuple(Op) ->
+ {K0,V0,L,tree(R, K, Op, H)};
+ true ->
+ tree(R, K, Op, H)
+ end
+ end.
+
+
+
+utf8_to_characters([]) -> [];
+utf8_to_characters([B|Bs]=Arg) when (B band 16#FF) =:= B ->
+ if 16#F8 =< B ->
+ erlang:error(badarg, [Arg]);
+ 16#F0 =< B ->
+ utf8_to_characters(Bs, B band 16#07, 3);
+ 16#E0 =< B ->
+ utf8_to_characters(Bs, B band 16#0F, 2);
+ 16#C0 =< B ->
+ utf8_to_characters(Bs, B band 16#1F, 1);
+ 16#80 =< B ->
+ erlang:error(badarg, [Arg]);
+ true ->
+ [B|utf8_to_characters(Bs)]
+ end.
+%%
+utf8_to_characters(Bs, U, 0) ->
+ [U|utf8_to_characters(Bs)];
+utf8_to_characters([B|Bs], U, N) when ((B band 16#3F) bor 16#80) =:= B ->
+ utf8_to_characters(Bs, (U bsl 6) bor (B band 16#3F), N-1).
+
ip_to_bytes(IP) when tuple_size(IP) =:= 4 -> ip4_to_bytes(IP);
ip_to_bytes(IP) when tuple_size(IP) =:= 8 -> ip6_to_bytes(IP).