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ergw_config.erl
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ergw_config.erl
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%% Copyright 2016, Travelping GmbH <info@travelping.com>
%% This program is free software; you can redistribute it and/or
%% modify it under the terms of the GNU General Public License
%% as published by the Free Software Foundation; either version
%% 2 of the License, or (at your option) any later version.
-module(ergw_config).
-compile({parse_transform, cut}).
-compile({parse_transform, do}).
-compile({no_auto_import,[put/2]}).
%% API
-export([load/0, apply/1, serialize_config/1, reload_config/1, ergw_core_init/2]).
-ifdef(TEST).
-export([config_meta/0,
load_schemas/0,
validate_config_with_schema/1,
normalize_meta/1,
serialize_config/2,
coerce_config/1,
coerce_config/2]).
-endif.
-ignore_xref([serialize_config/1]).
-include_lib("kernel/include/logger.hrl").
-include_lib("parse_trans/include/exprecs.hrl").
-include_lib("pfcplib/include/pfcp_packet.hrl").
-include("include/ergw.hrl").
-export_records([up_function_features]).
-define(is_opts(X), (is_list(X) orelse is_map(X))).
-define(non_empty_opts(X), ((is_list(X) andalso length(X) /= 0) orelse
(is_map(X) andalso map_size(X) /= 0))).
-define(IS_IPv4(X), (is_tuple(X) andalso tuple_size(X) == 4)).
-define(IS_IPv6(X), (is_tuple(X) andalso tuple_size(X) == 8)).
%%%===================================================================
%%% API
%%%===================================================================
reload_config(#{} = Config) ->
load_typespecs(),
do([error_m ||
load_schemas(),
validate_config_with_schema(Config),
return(coerce_config(Config))
]).
load() ->
load_typespecs(),
do([error_m ||
load_schemas(),
Config <- load_config(),
return(Config)
]).
load_config() ->
{ok, Config} = application:get_env(ergw, config),
load_config(Config).
load_config(Config) when is_list(Config) ->
load_config(maps:from_list(Config));
load_config(#{file := File, type := Type})
when (is_list(File) orelse is_binary(File)) andalso
(Type =:= yaml orelse Type =:= json) ->
do([error_m ||
Bin <- file:read_file(File),
Config <- case Type of
yaml ->
parse_yaml(Bin);
json ->
parse_json(Bin)
end,
validate_config_with_schema(Config),
return(coerce_config(Config))
]);
load_config(Config) ->
erlang:error(badarg, [Config]).
parse_yaml(Bin) ->
case fast_yaml:decode(Bin, [{maps, true}, sane_scalars]) of
{ok, [Terms]} ->
{ok, Terms};
Other ->
Other
end.
parse_json(Bin) ->
try
Dec = jsx:decode(Bin, [return_maps, {labels, binary}]),
{ok, Dec}
catch
exit:badarg ->
{error, invalid_json}
end.
apply(Config) ->
ergw_core_init(Config),
ok.
%% copied from ergw_aaa test suites
ergw_aaa_init(Config) ->
Init = [product_name, rate_limits, handlers, services, functions, apps],
lists:foreach(ergw_aaa_init(_, Config), Init).
ergw_aaa_init(product_name, #{product_name := PN0}) ->
PN = ergw_aaa_config:validate_option(product_name, to_binary(PN0)),
ergw_aaa:setopt(product_name, PN),
PN;
ergw_aaa_init(rate_limits, #{rate_limits := Limits0}) ->
Limits1 = maps:with([default], Limits0),
Limits = maps:merge(Limits1, maps:get(peers, Limits0, #{})),
lists:foreach(ergw_aaa:setopt(rate_limit, _), maps:to_list(Limits));
ergw_aaa_init(handlers, #{handlers := Handlers0}) ->
Handlers = ergw_aaa_config:validate_options(
fun ergw_aaa_config:validate_handler/2, Handlers0, []),
maps:map(fun ergw_aaa:add_handler/2, Handlers),
Handlers;
ergw_aaa_init(services, #{services := Services0}) ->
Services = ergw_aaa_config:validate_options(
fun ergw_aaa_config:validate_service/2, Services0, []),
maps:map(fun ergw_aaa:add_service/2, Services),
Services;
ergw_aaa_init(functions, #{functions := Functions0}) ->
Functions = ergw_aaa_config:validate_options(
fun ergw_aaa_config:validate_function/2, Functions0, []),
maps:map(fun ergw_aaa:add_function/2, Functions),
Functions;
ergw_aaa_init(apps, #{apps := Apps0}) ->
Apps = ergw_aaa_config:validate_options(fun ergw_aaa_config:validate_app/2, Apps0, []),
maps:map(fun ergw_aaa:add_application/2, Apps),
Apps;
ergw_aaa_init(K, _) ->
?LOG(warning, "The key ~p is missed in config of erGW-AAA", [K]),
{error, unhandled}.
ergw_sbi_client_init(Opts) ->
ergw_sbi_client_config:validate_options(fun ergw_sbi_client_config:validate_option/2, Opts).
ergw_core_init(Config) ->
Init = [node, aaa, wait_till_running, path_management, gtp_peers, node_selection,
sockets, upf_nodes, handlers, ip_pools, apns, charging, proxy_map,
http_api, sbi_client],
lists:foreach(ergw_core_init(_, Config), Init).
ergw_core_init(node, #{node := Node}) ->
ergw_core:start_node(Node);
ergw_core_init(aaa, #{aaa := AAA}) ->
ergw_aaa_init(AAA);
ergw_core_init(sbi_client, #{sbi_client := SbiClient}) ->
ergw_sbi_client_init(SbiClient);
ergw_core_init(wait_till_running, _) ->
ergw_core:wait_till_running();
ergw_core_init(path_management, #{path_management := PathM}) ->
Config0 = maps:with([busy, idle, suspect, down], PathM),
Old0 = maps:with([n3, t3, echo], PathM),
Old1 = case PathM of
#{icmp_error_handling := immediate} ->
Old0#{icmp_error => error};
#{icmp_error_handling := ignore} ->
Old0#{icmp_error => info};
_ ->
Old0
end,
Old = #{busy => Old1, idle => Old1, suspect => Old1, down => Old1},
Config = maps_recusive_merge(Old, Config0),
ok = ergw_core:setopts(path_management, Config);
ergw_core_init(gtp_peers, #{gtp_peers := Peers}) ->
maps:map(fun ergw_core:set_gtp_peer_opts/2, Peers);
ergw_core_init(node_selection, #{node_selection := NodeSel}) ->
ok = ergw_core:setopts(node_selection, NodeSel);
ergw_core_init(sockets, #{sockets := Sockets}) ->
maps:map(fun ergw_core:add_socket/2, Sockets);
ergw_core_init(upf_nodes, #{upf_nodes := UP}) ->
ergw_core:setopts(sx_defaults, maps:get(default, UP, #{})),
maps:map(fun ergw_core:add_sx_node/2, maps:get(entries, UP, #{}));
ergw_core_init(handlers, #{handlers := Handlers}) ->
maps:map(fun ergw_core:add_handler/2, Handlers);
ergw_core_init(ip_pools, #{ip_pools := Pools}) ->
maps:map(fun ergw_core:add_ip_pool/2, Pools);
ergw_core_init(apns, #{apns := APNs}) ->
maps:map(fun ergw_core:add_apn/2, APNs);
ergw_core_init(charging, #{charging := Charging}) ->
Init = [rules, rulebase, profile],
lists:foreach(ergw_charging_init(_, Charging), Init);
ergw_core_init(proxy_map, #{proxy_map := Map}) ->
ok = ergw_core:setopts(proxy_map, Map);
ergw_core_init(http_api, #{http_api := Opts}) ->
ergw_http_api:init(Opts);
ergw_core_init(K, _) ->
?LOG(warning, "The key ~p is missed in config of erGW", [K]),
{error, unhandled}.
ergw_charging_init(rules, #{rules := Rules}) ->
maps:map(fun ergw_core:add_charging_rule/2, Rules);
ergw_charging_init(rulebase, #{rulebase := RuleBase}) ->
maps:map(fun ergw_core:add_charging_rulebase/2, RuleBase);
ergw_charging_init(profiles, #{profiles := Profiles}) ->
maps:map(fun ergw_core:add_charging_profile/2, Profiles);
ergw_charging_init(_, _) ->
ok.
load_schemas() ->
jesse:load_schemas(
filename:join([code:lib_dir(ergw, priv), "schemas"]),
fun (Bin) ->
{ok, [Terms]} = fast_yaml:decode(Bin, [{maps, true}, sane_scalars]),
Terms
end).
%%%===================================================================
%%% config metadata
%%%===================================================================
optional(X) ->
#cnf_value{type = {optional, normalize_meta(X)}}.
config_raw_meta() ->
#{node => config_meta_node(),
apns => config_meta_apns(),
charging => config_meta_charging(),
cluster => config_meta_cluster(),
handlers => config_meta_handler(),
http_api => config_meta_http_api(),
ip_pools => config_meta_ip_pools(),
metrics => config_meta_metrics(),
node_selection => config_meta_node_selection(),
upf_nodes => config_meta_nodes(),
path_management => config_meta_path_management(),
gtp_peers => config_meta_gtp_peers(),
proxy_map => config_meta_proxy_map(),
sockets => config_meta_socket(),
teid => config_meta_tei_mngr(),
aaa => config_meta_aaa(),
sbi_client => config_meta_sbi_client()}.
config_meta() ->
load_typespecs(),
normalize_meta(config_raw_meta()).
config_meta_node() ->
#{accept_new => boolean,
node_id => binary,
plmn_id => #{mcc => mcc,
mnc => mnc}}.
config_meta_apns() ->
Meta = #{vrf => vrf,
vrfs => {list, vrf},
ip_pools => {list, binary},
nat_port_blocks => {list, binary},
bearer_type => atom,
prefered_bearer_type => atom,
ipv6_ue_interface_id => ip6_ifid,
inactivity_timeout => timeout,
upf_selection => {list, atom},
'MS-Primary-DNS-Server' => ip4_address,
'MS-Secondary-DNS-Server' => ip4_address,
'MS-Primary-NBNS-Server' => ip4_address,
'MS-Secondary-NBNS-Server' => ip4_address,
'DNS-Server-IPv6-Address' => {list, ip6_address},
'3GPP-IPv6-DNS-Servers' => {list, ip6_address}
},
{map, {apn, apn}, Meta}.
config_meta_charging() ->
Triggers = #{'cgi-sai-change' => atom,
'ecgi-change' => atom,
'max-cond-change' => atom,
'ms-time-zone-change' => atom,
'qos-change' => atom,
'rai-change' => atom,
'rat-change' => atom,
'sgsn-sgw-change' => atom,
'sgsn-sgw-plmn-id-change' => atom,
'tai-change' => atom,
'tariff-switch-change' => atom,
'user-location-info-change' => atom},
Online = #{},
Offline = #{enable => boolean,
triggers => Triggers},
FlowInfo = #{'Flow-Description' => optional(binary),
'Flow-Direction' => optional(integer)},
RedirectInfo = #{'Redirect-Support' => optional(integer),
'Redirect-Address-Type' => optional(integer),
'Redirect-Server-Address' => optional(binary)},
Rule = #{'Service-Identifier' => optional(atom), %%tbd: this is most likely wrong
'Rating-Group' => optional(integer),
'Online-Rating-Group' => optional(integer),
'Offline-Rating-Group' => optional(integer),
'Flow-Information' => {list, FlowInfo},
%% 'Default-Bearer-Indication'
'TDF-Application-Identifier' => optional(binary),
%% 'Flow-Status'
%% 'QoS-Information'
%% 'PS-to-CS-Session-Continuity'
%% 'Reporting-Level'
'Online' => optional(integer),
'Offline' => optional(integer),
%% 'Max-PLR-DL'
%% 'Max-PLR-UL'
'Metering-Method' => optional(integer),
'Precedence' => optional(integer),
%% 'AF-Charging-Identifier'
%% 'Flows'
%% 'Monitoring-Key'
'Redirect-Information' => optional(RedirectInfo)
%% 'Mute-Notification'
%% 'AF-Signalling-Protocol'
%% 'Sponsor-Identity'
%% 'Application-Service-Provider-Identity'
%% 'Required-Access-Info'
%% 'Sharing-Key-DL'
%% 'Sharing-Key-UL'
%% 'Traffic-Steering-Policy-Identifier-DL'
%% 'Traffic-Steering-Policy-Identifier-UL'
%% 'Content-Version'
},
Profile = #{online => Online,
offline => Offline},
#{rules => {map, {name, binary}, Rule},
rulebase => {kvlist, {name, binary}, {rules, {list, binary}}},
profiles => {map, {name, binary}, Profile}}.
config_meta_cluster() ->
#{enabled => boolean,
initial_timeout => timeout,
release_cursor_every => integer,
seed_nodes => term
}.
config_meta_handler() ->
{map, {name, binary}, {delegate, fun delegate_handler/1}}.
delegate_handler(Map) when is_map(Map) ->
Meta =
case to_atom(get_key(handler, Map)) of
ggsn_gn ->
config_meta_gtp_context();
pgw_s5s8 ->
config_meta_gtp_context();
saegw_s11 ->
config_meta_gtp_context();
ggsn_gn_proxy ->
config_meta_gtp_proxy_context();
pgw_s5s8_proxy ->
config_meta_gtp_proxy_context();
tdf ->
config_meta_tdf()
end,
normalize_meta(Meta).
config_meta_gtp_context() ->
#{
handler => atom,
protocol => atom,
sockets => {list, binary},
node_selection => {list, binary},
aaa => config_meta_aaa_opts()
}.
config_meta_aaa_opts() ->
#{'AAA-Application-Id' => binary,
'Username' => config_meta_aaa_attr_mapping(),
'Password' => config_meta_aaa_attr_mapping(),
'3GPP-GGSN-MCC-MNC' => #{mcc => mcc,
mnc => mnc}
}.
config_meta_aaa_attr_mapping() ->
#{default => passthrough,
from_protocol_opts => boolean}.
config_meta_gtp_proxy_context() ->
Context = #{proxy_sockets => {list, binary},
node_selection => {list, binary}},
#{handler => atom,
protocol => atom,
sockets => {list, binary},
node_selection => {list, binary},
aaa => config_meta_aaa_opts(),
proxy_data_source => module,
proxy_sockets => {list, binary},
contexts => {klist, {name, binary}, Context}
}.
config_meta_tdf() ->
#{handler => atom,
protocol => atom,
node_selection => {list, binary},
nodes => {list, binary},
apn => apn
}.
config_meta_http_api() ->
#{enabled => boolean,
ip => ip_address,
port => integer,
ipv6_v6only => boolean,
num_acceptors => integer
}.
config_meta_ip_pools() ->
Range = #{
start => ip_address,
'end' => ip_address,
prefix_len => integer
},
Meta = #{handler => module,
ranges => {list, Range},
'MS-Primary-DNS-Server' => ip4_address,
'MS-Secondary-DNS-Server' => ip4_address,
'MS-Primary-NBNS-Server' => ip4_address,
'MS-Secondary-NBNS-Server' => ip4_address,
'DNS-Server-IPv6-Address' => {list, ip6_address}, %tbd
'3GPP-IPv6-DNS-Servers' => {list, ip6_address}}, %tbd
{map, {name, binary}, Meta}.
config_meta_metrics() ->
#{gtp_path_rtt_millisecond_intervals => {list, integer}}.
config_meta_node_selection() ->
{map, {name, binary}, {delegate, fun delegate_node_selection_type/1}}.
delegate_node_selection_type(Map) when is_map(Map) ->
Meta =
case to_atom(get_key(type, Map)) of
static ->
config_meta_static();
dns ->
config_meta_dns_server()
end,
normalize_meta(Meta).
config_meta_static() ->
#{type => atom,
entries => {list, {delegate, fun delegate_static_rr_type/1}}}.
delegate_static_rr_type(Map) when is_map(Map) ->
Meta =
case to_atom(get_key(type, Map)) of
naptr ->
config_meta_rr_naptr();
host ->
config_meta_rr_host()
end,
normalize_meta(Meta).
config_meta_dns_server() ->
#{type => atom,
server => ip_address,
port => integer}.
config_meta_rr_naptr() ->
#{type => atom,
name => binary,
order => integer,
preference => integer,
service => atom,
protocols => {list, atom},
replacement => binary}.
config_meta_rr_host() ->
#{type => atom,
name => binary,
ip4 => {list, ip4_address},
ip6 => {list, ip6_address}}.
config_meta_nodes() ->
VRF = #{
features => {list, atom}
},
Heartbeat = #{
interval => timeout,
timeout => timeout,
retry => integer
},
Request = #{
timeout => timeout,
retry => integer
},
Pool = #{
ip_pools => {list, binary},
vrf => vrf,
nat_port_blocks => {list, binary},
ip_versions => {list, atom}
},
Default = #{
vrfs => {klist, {name, vrf}, VRF},
ue_ip_pools => {list, Pool},
node_selection => binary,
heartbeat => Heartbeat,
request => Request
},
Node =
Default#{
connect => boolean,
raddr => ip_address,
rport => integer
},
#{required_upff => upff,
default => Default,
entries => {map, {name, binary}, Node}}.
config_meta_path_management() ->
Events = #{icmp_error => atom,
echo_timeout => atom},
#{busy =>
#{t3 => integer, % echo retry interval
n3 => integer, % echo retry count
echo => echo, % echo retry interval when busy
events => Events % event to severity mapping
},
idle =>
#{t3 => integer, % echo retry interval
n3 => integer, % echo retry count
echo => echo, % echo retry interval when idle
timeout => timeout, % time to keep the path entry when idle
events => Events % event to severity mapping
},
suspect =>
#{t3 => integer, % echo retry interval
n3 => integer, % echo retry count
echo => echo, % echo retry interval when suspect
timeout => timeout, % time to keep the path entry when suspect
events => Events % event to severity mapping
},
down =>
#{t3 => integer, % echo retry interval
n3 => integer, % echo retry count
echo => echo, % echo retry interval when down
timeout => timeout, % time to keep the path entry when down
events => Events, % event to severity mapping
notify => atom
}
}.
config_meta_gtp_peers() ->
{klist, {ip, ip_address}, config_meta_path_management()}.
config_meta_proxy_map() ->
To = #{imsi => binary, msisdn => binary},
IMSI = {kvlist, {from, binary}, {to, To}},
APN = {kvlist, {from, apn}, {to, apn}},
#{imsi => IMSI, apn => APN}.
config_meta_socket() ->
{klist, {name, binary}, {delegate, fun delegate_socket_type/1}}.
delegate_socket_type(Map) when is_map(Map) ->
Meta =
case to_atom(get_key(type, Map)) of
'gtp-c' ->
config_meta_gtp_socket();
'gtp-u' ->
config_meta_gtp_socket();
'pfcp' ->
config_meta_pfcp_socket()
end,
normalize_meta(Meta).
config_meta_gtp_socket() ->
#{name => atom,
type => atom,
ip => ip_address,
cluster_ip => ip_address,
netdev => string,
netns => string,
vrf => vrf,
freebind => boolean,
reuseaddr => boolean,
send_port => integer,
rcvbuf => integer,
burst_size => integer}.
config_meta_pfcp_socket() ->
#{name => binary,
type => atom,
ip => ip_address,
netdev => string,
netns => string,
vrf => vrf,
freebind => boolean,
reuseaddr => boolean,
rcvbuf => integer,
socket => binary,
burst_size => integer}.
config_meta_tei_mngr() ->
#{prefix => integer,
len => integer}.
config_meta_sbi_client() ->
#{upf_selection => config_meta_sbi_client_upf_selection()}.
config_meta_sbi_client_upf_selection() ->
#{endpoint => string,
timeout => timeout,
default => string}.
config_meta_aaa() ->
#{product_name => config_meta_aaa_product_name(),
rate_limits => config_meta_aaa_rate_limits(),
functions => config_meta_aaa_functions(),
handlers => config_meta_aaa_handlers(),
services => config_meta_aaa_services(),
apps => config_meta_aaa_apps()}.
config_meta_aaa_product_name() ->
binary.
config_meta_aaa_rate_limits() ->
RateLimit = #{outstanding_requests => integer, rate => integer},
#{default => RateLimit,
peers => {klist, {host, binary}, RateLimit}}.
config_meta_aaa_functions() ->
{klist, {name, binary}, {delegate, fun delegate_aaa_function/1}}.
delegate_aaa_function(Map) when is_map(Map) ->
Meta =
case to_atom(get_key(handler, Map)) of
ergw_aaa_diameter ->
config_meta_aaa_function_diameter()
end,
normalize_meta(Meta).
config_meta_aaa_function_diameter() ->
Transport =
#{connect_to => binary,
recbuf => integer,
sndbuf => integer,
nodelay => boolean,
reuseaddr => boolean,
unordered => boolean},
#{handler => module,
'Origin-Host' => host_or_ip,
'Origin-Realm' => binary,
transports => {list, Transport}}.
config_meta_aaa_handlers() ->
{klist, {handler, module}, {delegate, fun delegate_aaa_handler/1}}.
delegate_aaa_handler(Map) when is_map(Map) ->
Meta =
case to_atom(get_key(handler, Map)) of
ergw_aaa_gx -> ergw_meta_aaa_handler_gx();
ergw_aaa_nasreq -> ergw_meta_aaa_handler_nasreq();
ergw_aaa_radius -> ergw_meta_aaa_handler_radius();
ergw_aaa_rf -> ergw_meta_aaa_handler_rf();
ergw_aaa_ro -> ergw_meta_aaa_handler_ro();
ergw_aaa_static -> ergw_meta_aaa_handler_static()
end,
normalize_meta(Meta).
ergw_meta_aaa_handler_gx() ->
Answer = #{avps => aaa_avp, state => atom},
#{handler => module,
function => binary,
'Destination-Host' => binary,
'Destination-Realm' => binary,
answers => {klist, {name, binary}, Answer},
answer_if_down => binary,
answer_if_timeout => binary,
avp_filter => aaa_avp_filter,
termination_cause_mapping => config_meta_term_cause_mapping()}.
ergw_meta_aaa_handler_nasreq() ->
#{handler => module,
function => binary,
accounting => atom,
'Destination-Host' => binary,
'Destination-Realm' => binary,
avp_filter => aaa_avp_filter,
termination_cause_mapping => config_meta_term_cause_mapping()}.
ergw_meta_aaa_handler_radius() ->
#{handler => module,
server => ergw_meta_radius_server(),
server_name => binary,
client_name => binary,
timeout => integer,
retries => integer,
async => boolean,
avp_filter => aaa_avp_filter,
vendor_dicts => atom,
termination_cause_mapping => config_meta_term_cause_mapping()}.
ergw_meta_radius_server() ->
#{host => host_or_ip,
port => integer,
secret => binary}.
ergw_meta_aaa_handler_rf() ->
#{handler => module,
function => binary,
accounting => atom,
'Destination-Host' => binary,
'Destination-Realm' => binary,
avp_filter => aaa_avp_filter,
termination_cause_mapping => config_meta_term_cause_mapping()}.
ergw_meta_aaa_handler_ro() ->
Answer = #{avps => aaa_avp, state => atom},
#{handler => module,
function => binary,
'Destination-Host' => binary,
'Destination-Realm' => binary,
'CC-Session-Failover' => atom,
'Credit-Control-Failure-Handling' => atom,
answers => {klist, {name, binary}, Answer},
answer_if_down => binary,
answer_if_timeout => binary,
answer_if_rate_limit => binary,
tx_timeout => integer,
max_retries => integer,
avp_filter => aaa_avp_filter,
termination_cause_mapping => config_meta_term_cause_mapping()}.
ergw_meta_aaa_handler_static() ->
Answer = #{avps => aaa_avp, state => atom},
#{handler => module,
defaults => aaa_avp,
answers => {klist, {name, binary}, Answer},
answer => binary}.
config_meta_term_cause_mapping() ->
{kvlist, {cause, atom}, {code, integer}}.
config_meta_aaa_services() ->
{klist, {service, binary}, {delegate, fun delegate_aaa_service/1}}.
delegate_aaa_service(Map) when is_map(Map) ->
Meta =
case (catch to_atom(get_key(handler, Map))) of
ergw_aaa_gx -> ergw_meta_aaa_handler_gx();
ergw_aaa_nasreq -> ergw_meta_aaa_handler_nasreq();
ergw_aaa_radius -> ergw_meta_aaa_handler_radius();
ergw_aaa_rf -> ergw_meta_aaa_handler_rf();
ergw_aaa_ro -> ergw_meta_aaa_handler_ro();
ergw_aaa_static -> ergw_meta_aaa_handler_static();
_ -> ergw_meta_aaa_handler_static()
end,
normalize_meta(Meta).
config_meta_aaa_apps() ->
{kvlist, {application, default_or_binary}, {procedures, aaa_procedures}}.
config_meta_aaa_application() ->
Service = #{service => binary,
answer => binary},
normalize_meta({list, Service}).
%%%===================================================================
%%% normalize functions
%%%===================================================================
normalize_meta({delegate, _} = Type) ->
Type;
normalize_meta(#cnf_value{} = Type) ->
Type;
normalize_meta(Object) when is_map(Object) ->
Meta = maps:map(fun (_, V) -> normalize_meta(V) end, Object),
#cnf_value{type = {object, Meta}};
normalize_meta({list, Type})->
Meta = normalize_meta(Type),
#cnf_value{type = {list, Meta}};
normalize_meta({klist, {KeyField, KeyType}, Type}) ->
KeyMeta = meta_type(KeyType),
Meta = normalize_meta(Type),
#cnf_value{type = {klist, {KeyField, KeyMeta, Meta}}};
normalize_meta({kvlist, {KField, KType}, {VField, VType}}) ->
KMeta = meta_type(KType),
VMeta = normalize_meta(VType),
#cnf_value{type = {kvlist, {KField, KMeta, VField, VMeta}}};
normalize_meta({map, {KeyField, KeyType}, Type})
when is_atom(KeyType) ->
KeyMeta = meta_type(KeyType),
Meta = normalize_meta(Type),
#cnf_value{type = {map, {KeyField, KeyMeta, Meta}}};
normalize_meta({map, _KeyType, _Type}) ->
erlang:error(not_impl_yet);
normalize_meta(Type) ->
meta_type(Type).
meta_type({Type, _} = Meta) when is_atom(Type) ->
#cnf_value{type = Meta};
meta_type(Type) when is_atom(Type) ->
#cnf_value{type = Type}.
%%%===================================================================
%%% Delegate Helper
%%%===================================================================
ts2meta({delegate, Meta}, V) when is_function(Meta, 1) ->
Meta(V);
ts2meta(TypeSpec, _) when is_record(TypeSpec, cnf_value) ->
TypeSpec;
ts2meta(TypeSpec, _) when is_map(TypeSpec) ->
TypeSpec.
ts2meta({delegate, Meta}, KeyField, K, V) when is_map(V), is_function(Meta, 1) ->
Meta(V#{KeyField => K});
ts2meta({delegate, Meta}, KeyField, K, _) when is_function(Meta, 1) ->
Meta(#{KeyField => K});
ts2meta(TypeSpec, _, _, _) when is_record(TypeSpec, cnf_value) ->
TypeSpec;
ts2meta(TypeSpec, _, _, _) when is_map(TypeSpec) ->
TypeSpec.
%%%===================================================================
%%% Helper
%%%===================================================================
maps_recusive_merge(Key, Value, Map) ->
maps:update_with(Key, fun(V) -> maps_recusive_merge(V, Value) end, Value, Map).
maps_recusive_merge(M1, M2)
when is_map(M1) andalso is_map(M1) ->
maps:fold(fun maps_recusive_merge/3, M1, M2);
maps_recusive_merge(_, New) ->
New.
take_key(Field, Map) when is_atom(Field), is_map_key(Field, Map) ->
maps:take(Field, Map);
take_key(Field, Map) ->
maps:take(to_binary(Field), Map).
get_key(Field, Map, Default) when is_atom(Field), is_map_key(Field, Map) ->
maps:get(Field, Map, Default);
get_key(Field, Map, Default) ->
maps:get(to_binary(Field), Map, Default).
get_key(Field, Map) when is_atom(Field), is_map_key(Field, Map) ->
maps:get(Field, Map);
get_key(Field, Map) ->
maps:get(to_binary(Field), Map).
%%%===================================================================
%%% Options Validation
%%%===================================================================
validate_config_with_schema(Config) ->
Schema = filename:join([code:lib_dir(ergw, priv), "schemas", "ergw_config.yaml"]),
case jesse:validate(Schema, Config) of
{ok, _} -> ok;
Other -> Other
end.
%%%===================================================================
%%% Options Coercion
%%%===================================================================
to_binary(V) when is_binary(V) ->
V;
to_binary(V) when is_list(V) ->
unicode:characters_to_binary(V);
to_binary(V) when is_atom(V) ->
atom_to_binary(V);
to_binary(V) when is_integer(V) ->
integer_to_binary(V);
to_binary(V) when is_float(V) ->
float_to_binary(V);
to_binary(V) ->
iolist_to_binary(io_lib:format("~0p", [V])).
to_boolean(0) -> false;
to_boolean("false") -> false;
to_boolean(<<"false">>) -> false;
to_boolean(V) when is_integer(V) -> V /= 0;
to_boolean("true") -> true;
to_boolean(<<"true">>) -> true;
to_boolean(V) when is_boolean(V) -> V.
%% to_atom(V) when is_atom(V) ->
%% V;
%% to_atom(V) when is_binary(V) ->
%% binary_to_existing_atom(V);
%% to_atom(V) when is_list(V) ->
%% list_to_existing_atom(V).
to_atom(V) when is_atom(V) ->
V;
to_atom(V) when is_binary(V) ->
binary_to_atom(V);
to_atom(V) when is_list(V) ->
list_to_atom(V).
to_integer(V) when is_integer(V) ->
V;
to_integer(V) when is_float(V) ->
round(V);
to_integer(V) when is_binary(V) ->
binary_to_integer(V);
to_integer(V) when is_list(V) ->
list_to_integer(V).
to_float(V) when is_float(V) ->
V;
to_float(V) when is_integer(V) ->
float(V);
to_float(V) when is_binary(V) ->
to_float(binary_to_list(V));
to_float(V) when is_list(V) ->
case lists:member($., V) of
true -> list_to_float(V);
false -> float(list_to_integer(V))
end.
to_string(V) when is_list(V); is_binary(V) ->
unicode:characters_to_list(V).
to_default_or_binary(V) ->
case to_binary(V) of
<<"default">> -> default;
Bin -> Bin
end.
to_module(V) ->
to_atom(V).
to_ip(Map) when is_map(Map) ->
[{_Type, IP}] = maps:to_list(Map),
to_ip(IP);
to_ip(IP) when is_tuple(IP) ->
ergw_inet:ip2bin(IP);
to_ip(IP) when is_list(IP) ->
{ok, Addr} = inet:parse_strict_address(IP),
ergw_inet:ip2bin(Addr);
to_ip(IP) when is_binary(IP) ->
case inet:parse_strict_address(binary_to_list(IP)) of
{ok, Addr} -> ergw_inet:ip2bin(Addr);
_ when size(IP) == 4; size(IP) == 16 ->
IP
end.
to_ip4(IP) ->
<<_:4/bytes>> = to_ip(IP).
to_ip6(IP) ->
<<_:16/bytes>> = to_ip(IP).
to_ip_address(Map) when is_map(Map) ->
[{_Type, IP}] = maps:to_list(Map),
to_ip_address(IP);
to_ip_address({_,_,_,_} = IP) ->
IP;
to_ip_address({_,_,_,_,_,_,_,_} = IP) ->
IP;
to_ip_address(IP) when is_list(IP) ->
{ok, Addr} = inet:parse_strict_address(IP),
Addr;
to_ip_address(IP) when is_binary(IP) ->
case inet:parse_strict_address(binary_to_list(IP)) of
{ok, Addr} -> Addr;
_ -> ergw_inet:bin2ip(IP)
end.
to_ip4_address(IP) ->
{_, _, _, _} = to_ip_address(IP).
to_ip6_address(IP) ->
{_, _, _, _, _, _, _, _} = to_ip_address(IP).
to_host_or_ip(#{<<"ipv4Addr">> := Bin}) when is_binary(Bin) ->
{ok, IP} = inet:parse_ipv4_address(binary_to_list(Bin)),
IP;
to_host_or_ip(#{<<"ipv6Addr">> := Bin}) when is_binary(Bin) ->
{ok, IP} = inet:parse_ipv6_address(binary_to_list(Bin)),
IP;
to_host_or_ip(#{<<"fqdn">> := Bin}) when is_binary(Bin) ->
Bin.
to_apn(<<"*">>) ->
'_';
to_apn(APN) ->
gtp_c_lib:normalize_labels(APN).
to_timeout(infinity) ->
infinity;
to_timeout("infinity") ->
infinity;
to_timeout(<<"infinity">>) ->
infinity;
to_timeout(Timeout) when is_integer(Timeout) ->
Timeout;
to_timeout(Timeout) when is_list(Timeout) ->
list_to_integer(Timeout);
to_timeout(Timeout) when is_binary(Timeout) ->
binary_to_integer(Timeout);
to_timeout({day, Timeout}) ->