Harald Welte | d44e3ea | 2013-09-08 21:33:10 +0200 | [diff] [blame] | 1 | % Internal SS7 link database keeping |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 2 | |
Harald Welte | d44e3ea | 2013-09-08 21:33:10 +0200 | [diff] [blame] | 3 | % (C) 2011-2013 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 4 | % |
| 5 | % All Rights Reserved |
| 6 | % |
| 7 | % This program is free software; you can redistribute it and/or modify |
| 8 | % it under the terms of the GNU Affero General Public License as |
| 9 | % published by the Free Software Foundation; either version 3 of the |
| 10 | % License, or (at your option) any later version. |
| 11 | % |
| 12 | % This program is distributed in the hope that it will be useful, |
| 13 | % but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | % GNU General Public License for more details. |
| 16 | % |
| 17 | % You should have received a copy of the GNU Affero General Public License |
| 18 | % along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | f8bf032 | 2012-04-16 13:10:47 +0200 | [diff] [blame] | 19 | % |
| 20 | % Additional Permission under GNU AGPL version 3 section 7: |
| 21 | % |
| 22 | % If you modify this Program, or any covered work, by linking or |
| 23 | % combining it with runtime libraries of Erlang/OTP as released by |
| 24 | % Ericsson on http://www.erlang.org (or a modified version of these |
| 25 | % libraries), containing parts covered by the terms of the Erlang Public |
| 26 | % License (http://www.erlang.org/EPLICENSE), the licensors of this |
| 27 | % Program grant you additional permission to convey the resulting work |
| 28 | % without the need to license the runtime libraries of Erlang/OTP under |
| 29 | % the GNU Affero General Public License. Corresponding Source for a |
| 30 | % non-source form of such a combination shall include the source code |
| 31 | % for the parts of the runtime libraries of Erlang/OTP used as well as |
| 32 | % that of the covered work. |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 33 | |
| 34 | -module(ss7_links). |
| 35 | -behaviour(gen_server). |
| 36 | |
| 37 | -include_lib("osmo_ss7/include/mtp3.hrl"). |
Harald Welte | 7dadde8 | 2011-10-19 13:40:39 +0200 | [diff] [blame] | 38 | -include_lib("osmo_ss7/include/osmo_util.hrl"). |
Harald Welte | d44e3ea | 2013-09-08 21:33:10 +0200 | [diff] [blame] | 39 | -include_lib("osmo_ss7/include/osmo_ss7.hrl"). |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 40 | |
| 41 | % gen_fsm callbacks |
| 42 | -export([init/1, handle_call/3, handle_cast/2, handle_info/2, |
| 43 | terminate/2, code_change/3]). |
| 44 | |
| 45 | % our published API |
Harald Welte | d44e3ea | 2013-09-08 21:33:10 +0200 | [diff] [blame] | 46 | -export([start_link/0, reload_config/0]). |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 47 | |
| 48 | % client functions, may internally talk to our sccp_user server |
| 49 | -export([register_linkset/3, unregister_linkset/1]). |
| 50 | -export([register_link/3, unregister_link/2, set_link_state/3]). |
| 51 | -export([bind_service/2, unbind_service/1]). |
| 52 | |
Harald Welte | 9b5ea3e | 2011-12-08 14:09:34 +0100 | [diff] [blame] | 53 | -export([get_pid_for_link/2, get_pid_for_dpc_sls/2, |
| 54 | mtp3_tx/1, mtp3_tx/2, |
Harald Welte | 7dadde8 | 2011-10-19 13:40:39 +0200 | [diff] [blame] | 55 | get_linkset_for_dpc/1, get_opc_for_linkset/1, is_pc_local/1, |
Harald Welte | c3cc853 | 2013-07-27 14:54:23 +0800 | [diff] [blame] | 56 | get_user_pid_for_service/1, mtp3_rx/1, dump/0, |
| 57 | role2sctp_role/1]). |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 58 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 59 | -type link_state() :: down | up_inactive | active. |
| 60 | -opaque tid() :: integer(). |
| 61 | -type error() :: { error, term() }. |
| 62 | -type osmo_point_code() :: non_neg_integer(). |
| 63 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 64 | -record(slink, { |
| 65 | key, % {linkset_name, sls} |
Harald Welte | b8bfc4e | 2011-10-11 18:49:59 +0200 | [diff] [blame] | 66 | name, % name of the link |
| 67 | linkset_name, % name of the linkset to which we belong |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 68 | sls, |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 69 | user_pid :: pid(), % Pid handling MTP-TRANSFER primitives |
| 70 | state :: link_state() |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 71 | }). |
| 72 | |
| 73 | -record(slinkset, { |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 74 | name :: string(), % name of the linkset |
| 75 | local_pc :: non_neg_integer(), % local point code |
| 76 | remote_pc :: non_neg_integer(), % remote point code |
| 77 | user_pid :: pid(), |
| 78 | state :: link_state(), |
| 79 | active_sls :: list() % list of Sls of currently active links |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 80 | }). |
| 81 | |
| 82 | -record(service, { |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 83 | name :: string(), |
| 84 | service_nr :: non_neg_integer(), |
| 85 | user_pid :: pid() |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 86 | }). |
| 87 | |
| 88 | -record(su_state, { |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 89 | linkset_tbl :: tid(), |
| 90 | link_tbl :: tid(), |
| 91 | service_tbl :: tid() |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 92 | }). |
| 93 | |
| 94 | |
| 95 | % initialization code |
| 96 | |
| 97 | start_link() -> |
| 98 | gen_server:start_link({local, ?MODULE}, ?MODULE, [], [{debug, [trace]}]). |
| 99 | |
| 100 | init(_Arg) -> |
| 101 | LinksetTbl = ets:new(ss7_linksets, [ordered_set, named_table, |
| 102 | {keypos, #slinkset.name}]), |
| 103 | ServiceTbl = ets:new(mtp3_services, [ordered_set, named_table, |
| 104 | {keypos, #service.service_nr}]), |
| 105 | |
| 106 | % create a named table so we can query without reference directly |
| 107 | % within client/caller process |
| 108 | LinkTbl = ets:new(ss7_link_table, [ordered_set, named_table, |
| 109 | {keypos, #slink.key}]), |
Harald Welte | 1ea4469 | 2011-10-10 19:19:13 +0200 | [diff] [blame] | 110 | process_flag(trap_exit, true), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 111 | {ok, #su_state{linkset_tbl = LinksetTbl, link_tbl = LinkTbl, |
| 112 | service_tbl = ServiceTbl}}. |
| 113 | |
| 114 | % client side API |
| 115 | |
| 116 | % all write operations go through gen_server:call(), as only the ?MODULE |
| 117 | % process has permission to modify the table content |
| 118 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 119 | -spec register_linkset(non_neg_integer(), non_neg_integer(), string()) |
| 120 | -> ok | error(). |
| 121 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 122 | register_linkset(LocalPc, RemotePc, Name) -> |
| 123 | gen_server:call(?MODULE, {register_linkset, {LocalPc, RemotePc, Name}}). |
| 124 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 125 | -spec unregister_linkset(string()) -> ok | error(). |
| 126 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 127 | unregister_linkset(Name) -> |
| 128 | gen_server:call(?MODULE, {unregister_linkset, {Name}}). |
| 129 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 130 | -spec register_link(string(), non_neg_integer(), string()) -> |
| 131 | ok | error(). |
| 132 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 133 | register_link(LinksetName, Sls, Name) -> |
| 134 | gen_server:call(?MODULE, {register_link, {LinksetName, Sls, Name}}). |
| 135 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 136 | -spec unregister_link(string(), non_neg_integer()) -> |
| 137 | ok | error(). |
| 138 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 139 | unregister_link(LinksetName, Sls) -> |
| 140 | gen_server:call(?MODULE, {unregister_link, {LinksetName, Sls}}). |
| 141 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 142 | -spec set_link_state(string(), non_neg_integer(), link_state()) -> |
| 143 | ok | error(). |
| 144 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 145 | set_link_state(LinksetName, Sls, State) -> |
| 146 | gen_server:call(?MODULE, {set_link_state, {LinksetName, Sls, State}}). |
| 147 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 148 | -spec bind_service(non_neg_integer(), string()) -> |
| 149 | ok | error(). |
| 150 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 151 | % bind a service (such as ISUP, SCCP) to the MTP3 link manager |
| 152 | bind_service(ServiceNum, ServiceName) -> |
| 153 | gen_server:call(?MODULE, {bind_service, {ServiceNum, ServiceName}}). |
| 154 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 155 | -spec unbind_service(non_neg_integer()) -> |
| 156 | ok | error(). |
| 157 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 158 | % unbind a service (such as ISUP, SCCP) from the MTP3 link manager |
| 159 | unbind_service(ServiceNum) -> |
| 160 | gen_server:call(?MODULE, {unbind_service, {ServiceNum}}). |
| 161 | |
| 162 | % the lookup functions can directly use the ets named_table from within |
| 163 | % the client process, no need to go through a synchronous IPC |
| 164 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 165 | -spec get_user_pid_for_service(non_neg_integer()) -> |
| 166 | {ok, pid()} | error(). |
| 167 | |
Harald Welte | 7dadde8 | 2011-10-19 13:40:39 +0200 | [diff] [blame] | 168 | get_user_pid_for_service(Service) when is_integer(Service) -> |
| 169 | case ets:lookup(mtp3_services, Service) of |
| 170 | [#service{user_pid=Pid}] -> |
| 171 | {ok, Pid}; |
| 172 | [] -> |
| 173 | {error, no_such_service} |
| 174 | end. |
| 175 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 176 | -spec get_pid_for_link(string(), non_neg_integer()) -> |
| 177 | {ok, pid()} | error(). |
| 178 | |
Harald Welte | 805fac4 | 2011-10-12 17:17:55 +0200 | [diff] [blame] | 179 | get_pid_for_link(LinksetName, Sls) when is_list(LinksetName), is_integer(Sls) -> |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 180 | case ets:lookup(ss7_link_table, {LinksetName, Sls}) of |
| 181 | [#slink{user_pid = Pid}] -> |
| 182 | % FIXME: check the link state |
| 183 | {ok, Pid}; |
| 184 | _ -> |
| 185 | {error, no_such_link} |
| 186 | end. |
| 187 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 188 | -spec get_linkset_for_dpc(osmo_point_code()) -> |
| 189 | {ok, string()} | error(). |
| 190 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 191 | % Resolve linkset name directly connected to given point code |
Harald Welte | 4608ba1 | 2011-12-08 12:10:34 +0100 | [diff] [blame] | 192 | get_linkset_for_dpc(DpcIn) -> |
| 193 | Dpc = osmo_util:pointcode2int(DpcIn), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 194 | Ret = ets:match_object(ss7_linksets, |
| 195 | #slinkset{remote_pc = Dpc, _ = '_'}), |
| 196 | case Ret of |
| 197 | [] -> |
| 198 | {error, undefined}; |
| 199 | [#slinkset{name=Name}|_Tail] -> |
| 200 | {ok, Name} |
| 201 | end. |
| 202 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 203 | -spec get_pid_for_dpc_sls(osmo_point_code(), non_neg_integer()) -> |
| 204 | {ok, string()} | error(). |
| 205 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 206 | % resolve link-handler Pid for given (directly connected) point code/sls |
Harald Welte | 4608ba1 | 2011-12-08 12:10:34 +0100 | [diff] [blame] | 207 | get_pid_for_dpc_sls(DpcIn, Sls) when is_integer(Sls) -> |
| 208 | Dpc = osmo_util:pointcode2int(DpcIn), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 209 | case get_linkset_for_dpc(Dpc) of |
| 210 | {error, Err} -> |
| 211 | {error, Err}; |
| 212 | {ok, LinksetName} -> |
| 213 | get_pid_for_link(LinksetName, Sls) |
| 214 | end. |
| 215 | |
Harald Welte | 7580dc5 | 2012-01-28 14:42:45 +0100 | [diff] [blame] | 216 | -spec get_opc_for_linkset(string()) -> non_neg_integer() | undefined. |
| 217 | |
Harald Welte | 805fac4 | 2011-10-12 17:17:55 +0200 | [diff] [blame] | 218 | % the the local point code for a given linkset |
| 219 | get_opc_for_linkset(LsName) when is_list(LsName) -> |
| 220 | case ets:lookup(ss7_linksets, LsName) of |
| 221 | [#slinkset{local_pc = Opc}|_Tail] -> |
| 222 | Opc; |
| 223 | _ -> |
| 224 | undefined |
| 225 | end. |
| 226 | |
| 227 | % determine if a given point code is local |
| 228 | is_pc_local(Pc) when is_integer(Pc) -> |
| 229 | Ret = ets:match_object(ss7_linksets, |
| 230 | #slinkset{local_pc = Pc, _ = '_'}), |
| 231 | case Ret of |
| 232 | [#slinkset{}] -> |
| 233 | true; |
| 234 | _ -> |
| 235 | false |
| 236 | end. |
| 237 | |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 238 | % process a received message on an underlying link |
Harald Welte | a4a6f9b | 2012-01-31 22:30:58 +0100 | [diff] [blame] | 239 | mtp3_rx(Mtp3) when is_record(Mtp3, mtp3_msg) -> |
| 240 | mtp3_rx(osmo_util:make_prim('MTP', 'TRANSFER', indication, Mtp3)); |
Harald Welte | fe275c0 | 2011-12-08 14:19:49 +0100 | [diff] [blame] | 241 | % FIXME: PAUSE/RESUME/STATUS handling |
Harald Welte | a4a6f9b | 2012-01-31 22:30:58 +0100 | [diff] [blame] | 242 | mtp3_rx(#primitive{subsystem='MTP', gen_name='PAUSE', spec_name=indication}) -> |
Harald Welte | fe275c0 | 2011-12-08 14:19:49 +0100 | [diff] [blame] | 243 | ok; |
Harald Welte | a4a6f9b | 2012-01-31 22:30:58 +0100 | [diff] [blame] | 244 | mtp3_rx(#primitive{subsystem='MTP', gen_name='RESUME', spec_name=indication}) -> |
Harald Welte | fe275c0 | 2011-12-08 14:19:49 +0100 | [diff] [blame] | 245 | ok; |
Harald Welte | a4a6f9b | 2012-01-31 22:30:58 +0100 | [diff] [blame] | 246 | mtp3_rx(#primitive{subsystem='MTP', gen_name='STATUS', spec_name=indication}) -> |
Harald Welte | fe275c0 | 2011-12-08 14:19:49 +0100 | [diff] [blame] | 247 | ok; |
Harald Welte | 7dadde8 | 2011-10-19 13:40:39 +0200 | [diff] [blame] | 248 | mtp3_rx(P = #primitive{parameters=#mtp3_msg{service_ind=Serv}}) -> |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 249 | case ets:lookup(mtp3_services, Serv) of |
| 250 | [#service{user_pid = Pid}] -> |
Harald Welte | 7dadde8 | 2011-10-19 13:40:39 +0200 | [diff] [blame] | 251 | gen_server:cast(Pid, P); |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 252 | _ -> |
| 253 | % FIXME: send back some error message on MTP level |
| 254 | ok |
| 255 | end. |
| 256 | |
| 257 | |
| 258 | % transmit a MTP3 message via any of the avaliable links for the DPC |
Harald Welte | 9b5ea3e | 2011-12-08 14:09:34 +0100 | [diff] [blame] | 259 | mtp3_tx(Mtp3 = #mtp3_msg{routing_label = RoutLbl}, Link) -> |
| 260 | #mtp3_routing_label{sig_link_sel = Sls} = RoutLbl, |
| 261 | % discover the link through which we shall send |
| 262 | case get_pid_for_link(Link, Sls) of |
| 263 | {error, Error} -> |
| 264 | {error, Error}; |
| 265 | {ok, Pid} -> |
| 266 | gen_server:cast(Pid, |
| 267 | osmo_util:make_prim('MTP', 'TRANSFER', |
| 268 | request, Mtp3)) |
| 269 | end. |
| 270 | |
| 271 | |
| 272 | % transmit a MTP3 message via any of the avaliable links for the DPC |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 273 | mtp3_tx(Mtp3 = #mtp3_msg{routing_label = RoutLbl}) -> |
| 274 | #mtp3_routing_label{dest_pc = Dpc, sig_link_sel = Sls} = RoutLbl, |
| 275 | % discover the link through which we shall send |
Harald Welte | a4a6f9b | 2012-01-31 22:30:58 +0100 | [diff] [blame] | 276 | case ss7_routes:route_dpc(Dpc) of |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 277 | {error, Error} -> |
| 278 | {error, Error}; |
Harald Welte | a4a6f9b | 2012-01-31 22:30:58 +0100 | [diff] [blame] | 279 | {ok, Linkset} -> |
| 280 | {ok, Pid} = get_pid_for_link(Linkset, Sls), |
| 281 | gen_server:cast(Pid, |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 282 | osmo_util:make_prim('MTP', 'TRANSFER', |
| 283 | request, Mtp3)) |
| 284 | end. |
| 285 | |
Harald Welte | dd57e67 | 2011-10-10 14:54:06 +0200 | [diff] [blame] | 286 | dump() -> |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 287 | List = ets:tab2list(ss7_linksets), |
Harald Welte | dd57e67 | 2011-10-10 14:54:06 +0200 | [diff] [blame] | 288 | dump_linksets(List), |
Harald Welte | 0013e79 | 2011-10-10 14:58:29 +0200 | [diff] [blame] | 289 | SList = ets:tab2list(mtp3_services), |
Harald Welte | dd57e67 | 2011-10-10 14:54:06 +0200 | [diff] [blame] | 290 | dump_services(SList). |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 291 | |
| 292 | dump_linksets([]) -> |
| 293 | ok; |
| 294 | dump_linksets([Head|Tail]) when is_record(Head, slinkset) -> |
| 295 | dump_single_linkset(Head), |
| 296 | dump_linksets(Tail). |
| 297 | |
| 298 | dump_single_linkset(Sls) when is_record(Sls, slinkset) -> |
| 299 | #slinkset{name = Name, local_pc = Lpc, remote_pc = Rpc, |
Harald Welte | dd57e67 | 2011-10-10 14:54:06 +0200 | [diff] [blame] | 300 | user_pid = Pid, state = State} = Sls, |
| 301 | io:format("Linkset ~p, Local PC: ~p, Remote PC: ~p, Pid: ~p, State: ~p~n", |
| 302 | [Name, Lpc, Rpc, Pid, State]), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 303 | dump_linkset_links(Name). |
| 304 | |
| 305 | dump_linkset_links(Name) -> |
| 306 | List = ets:match_object(ss7_link_table, |
| 307 | #slink{key={Name,'_'}, _='_'}), |
| 308 | dump_links(List). |
| 309 | |
| 310 | dump_links([]) -> |
| 311 | ok; |
| 312 | dump_links([Head|Tail]) when is_record(Head, slink) -> |
Harald Welte | dd57e67 | 2011-10-10 14:54:06 +0200 | [diff] [blame] | 313 | #slink{name = Name, sls = Sls, state = State, user_pid = Pid} = Head, |
| 314 | io:format(" Link ~p, SLS: ~p, Pid: ~p, State: ~p~n", |
| 315 | [Name, Sls, Pid, State]), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 316 | dump_links(Tail). |
| 317 | |
Harald Welte | dd57e67 | 2011-10-10 14:54:06 +0200 | [diff] [blame] | 318 | dump_services([]) -> |
| 319 | ok; |
| 320 | dump_services([Head|Tail]) when is_record(Head, service) -> |
| 321 | #service{name = Name, user_pid = Pid, service_nr = Nr} = Head, |
| 322 | io:format("Service ~p bound to ~p (Pid ~p)~n", [Nr, Name, Pid]), |
| 323 | dump_services(Tail). |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 324 | |
| 325 | % server side code |
| 326 | |
| 327 | handle_call({register_linkset, {LocalPc, RemotePc, Name}}, |
| 328 | {FromPid, _FromRef}, S) -> |
| 329 | #su_state{linkset_tbl = Tbl} = S, |
| 330 | Ls = #slinkset{local_pc = LocalPc, remote_pc = RemotePc, |
Harald Welte | b8bfc4e | 2011-10-11 18:49:59 +0200 | [diff] [blame] | 331 | name = Name, user_pid = FromPid, |
| 332 | state = down, active_sls=[]}, |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 333 | case ets:insert_new(Tbl, Ls) of |
| 334 | false -> |
| 335 | {reply, {error, ets_insert}, S}; |
| 336 | _ -> |
| 337 | % We need to trap the user Pid for EXIT |
| 338 | % in order to automatically remove any links/linksets if |
| 339 | % the user process dies |
Harald Welte | a4a6f9b | 2012-01-31 22:30:58 +0100 | [diff] [blame] | 340 | % |
| 341 | % we decided to keep Linksets as something like global |
| 342 | % configuration around and not kill them in case the user who |
| 343 | % created them has died. |
| 344 | %link(FromPid), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 345 | {reply, ok, S} |
| 346 | end; |
| 347 | |
| 348 | handle_call({unregister_linkset, {Name}}, {FromPid, _FromRef}, S) -> |
| 349 | #su_state{linkset_tbl = Tbl} = S, |
| 350 | ets:delete(Tbl, Name), |
| 351 | {reply, ok, S}; |
| 352 | |
| 353 | handle_call({register_link, {LsName, Sls, Name}}, |
| 354 | {FromPid, _FromRef}, S) -> |
| 355 | #su_state{linkset_tbl = LinksetTbl, link_tbl = LinkTbl} = S, |
| 356 | % check if linkset actually exists |
| 357 | case ets:lookup(LinksetTbl, LsName) of |
| 358 | [#slinkset{}] -> |
| 359 | Link = #slink{name = Name, sls = Sls, state = down, |
| 360 | user_pid = FromPid, key = {LsName, Sls}}, |
| 361 | case ets:insert_new(LinkTbl, Link) of |
| 362 | false -> |
| 363 | {reply, {error, link_exists}, S}; |
| 364 | _ -> |
| 365 | % We need to trap the user Pid for EXIT |
| 366 | % in order to automatically remove any links if |
| 367 | % the user process dies |
| 368 | link(FromPid), |
| 369 | {reply, ok, S} |
| 370 | end; |
| 371 | _ -> |
| 372 | {reply, {error, no_such_linkset}, S} |
| 373 | end; |
| 374 | |
| 375 | handle_call({unregister_link, {LsName, Sls}}, {FromPid, _FromRef}, S) -> |
| 376 | #su_state{link_tbl = LinkTbl} = S, |
| 377 | ets:delete(LinkTbl, {LsName, Sls}), |
| 378 | {reply, ok, S}; |
| 379 | |
| 380 | handle_call({set_link_state, {LsName, Sls, State}}, {FromPid, _}, S) -> |
| 381 | #su_state{link_tbl = LinkTbl} = S, |
| 382 | case ets:lookup(LinkTbl, {LsName, Sls}) of |
| 383 | [] -> |
| 384 | {reply, {error, no_such_link}, S}; |
| 385 | [Link] -> |
| 386 | NewLink = Link#slink{state = State}, |
| 387 | ets:insert(LinkTbl, NewLink), |
Harald Welte | b8bfc4e | 2011-10-11 18:49:59 +0200 | [diff] [blame] | 388 | propagate_linkstate_to_linkset(LsName, Sls, State), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 389 | {reply, ok, S} |
| 390 | end; |
| 391 | |
| 392 | handle_call({bind_service, {SNum, SName}}, {FromPid, _}, |
| 393 | #su_state{service_tbl = ServTbl} = S) -> |
| 394 | NewServ = #service{name = SName, service_nr = SNum, |
| 395 | user_pid = FromPid}, |
| 396 | case ets:insert_new(ServTbl, NewServ) of |
| 397 | false -> |
| 398 | {reply, {error, ets_insert}, S}; |
| 399 | _ -> |
Harald Welte | dfe15e7 | 2011-10-10 14:49:19 +0200 | [diff] [blame] | 400 | % We need to trap the user Pid for EXIT |
| 401 | % in order to automatically remove any links if |
| 402 | % the user process dies |
| 403 | link(FromPid), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 404 | {reply, ok, S} |
| 405 | end; |
| 406 | handle_call({unbind_service, {SNum}}, {FromPid, _}, |
| 407 | #su_state{service_tbl = ServTbl} = S) -> |
| 408 | ets:delete(ServTbl, SNum), |
| 409 | {reply, ok, S}. |
| 410 | |
| 411 | handle_cast(Info, S) -> |
| 412 | error_logger:error_report(["unknown handle_cast", |
| 413 | {module, ?MODULE}, |
| 414 | {info, Info}, {state, S}]), |
| 415 | {noreply, S}. |
| 416 | |
| 417 | handle_info({'EXIT', Pid, Reason}, S) -> |
| 418 | io:format("EXIT from Process ~p (~p), cleaning up tables~n", |
| 419 | [Pid, Reason]), |
Harald Welte | dfe15e7 | 2011-10-10 14:49:19 +0200 | [diff] [blame] | 420 | #su_state{linkset_tbl = LinksetTbl, link_tbl = LinkTbl, |
| 421 | service_tbl = ServiceTbl} = S, |
Harald Welte | 8a9f28c | 2011-10-10 19:31:27 +0200 | [diff] [blame] | 422 | % we decided to keep Linksets as something like global |
| 423 | % configuration around and not kill them in case the user who |
| 424 | % created them has died. |
| 425 | %ets:match_delete(LinksetTbl, #slinkset{user_pid = Pid, _='_'}), |
Harald Welte | dfe15e7 | 2011-10-10 14:49:19 +0200 | [diff] [blame] | 426 | ets:match_delete(LinkTbl, #slink{user_pid = Pid, _='_'}), |
| 427 | ets:match_delete(ServiceTbl, #service{user_pid = Pid, _='_'}), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 428 | {noreply, S}; |
| 429 | handle_info(Info, S) -> |
| 430 | error_logger:error_report(["unknown handle_info", |
| 431 | {module, ?MODULE}, |
| 432 | {info, Info}, {state, S}]), |
| 433 | {noreply, S}. |
| 434 | |
| 435 | terminate(Reason, _S) -> |
| 436 | io:format("terminating ~p with reason ~p", [?MODULE, Reason]), |
| 437 | ok. |
| 438 | |
| 439 | code_change(_OldVsn, State, _Extra) -> |
| 440 | {ok, State}. |
Harald Welte | b8bfc4e | 2011-10-11 18:49:59 +0200 | [diff] [blame] | 441 | |
| 442 | % update the active_sls state in a linkset after a link state chg |
| 443 | propagate_linkstate_to_linkset(LsName, Sls, State) -> |
| 444 | case ets:lookup(ss7_linksets, LsName) of |
| 445 | [Ls = #slinkset{}] -> |
| 446 | #slinkset{active_sls = ActSls, remote_pc = Dpc} = Ls, |
| 447 | case State of |
| 448 | active -> |
| 449 | % add Sls to list (unique) |
| 450 | ActSls2 = lists:usort([Sls|ActSls]); |
| 451 | _ -> |
| 452 | % del Sls from list |
| 453 | ActSls2 = lists:delete(Sls, ActSls) |
| 454 | end, |
| 455 | % compute the linkstate state |
| 456 | case ActSls2 of |
| 457 | [] -> |
| 458 | LsState = up_inactive, |
| 459 | ss7_routes:delete_route(Dpc, 16#ffff, LsName); |
| 460 | _ -> |
| 461 | LsState = active, |
| 462 | ss7_routes:create_route(Dpc, 16#ffff, LsName) |
| 463 | end, |
| 464 | ets:insert(ss7_linksets, |
| 465 | Ls#slinkset{active_sls = ActSls2, |
| 466 | state = LsState}); |
| 467 | _ -> |
| 468 | {error, ets_lookup} |
| 469 | end. |
Harald Welte | c3cc853 | 2013-07-27 14:54:23 +0800 | [diff] [blame] | 470 | |
| 471 | role2sctp_role(asp) -> |
| 472 | active; |
| 473 | role2sctp_role(sg) -> |
| 474 | passive. |
Harald Welte | d44e3ea | 2013-09-08 21:33:10 +0200 | [diff] [blame] | 475 | |
| 476 | |
| 477 | to_peer({Ip, Port, Pointcode}) -> |
Harald Welte | e9c97f8 | 2013-09-08 21:52:34 +0200 | [diff] [blame] | 478 | {ok, ParsedIp} = inet:parse_address(Ip), |
| 479 | #sigtran_peer{ip=ParsedIp, port=Port, point_code=Pointcode}. |
Harald Welte | d44e3ea | 2013-09-08 21:33:10 +0200 | [diff] [blame] | 480 | |
| 481 | reconfig_linkset({Name, LocalPC, RemotePC}) -> |
| 482 | unregister_linkset(Name), |
| 483 | case register_linkset(LocalPC, RemotePC, Name) of |
| 484 | ok -> true; |
| 485 | _ -> false |
| 486 | end. |
| 487 | |
| 488 | reconfig_link({Name, {Lset, Sls}, Type, Local, Remote}) -> |
| 489 | % FIXME: not relaod safe!! |
| 490 | L = #sigtran_link{type=Type, name=Name, linkset_name=Lset, |
| 491 | sls=Sls, local=to_peer(Local), remote=to_peer(Remote)}, |
| 492 | case osmo_ss7_sup:add_mtp_link(L) of |
| 493 | {ok, _, _} -> true; |
| 494 | {ok, _} -> true; |
| 495 | {error, _} -> false |
| 496 | end. |
| 497 | |
| 498 | reload_config() -> |
| 499 | Linksets = osmo_util:get_env(osmo_ss7, linksets, []), |
| 500 | LinksetsRes = lists:all(fun reconfig_linkset/1, Linksets), |
| 501 | Links = osmo_util:get_env(osmo_ss7, links, []), |
| 502 | LinksRes = lists:all(fun reconfig_link/1, Links), |
| 503 | LinksetsRes and LinksRes. |