3 /* amok peer management - servers main loop and remote peer stopping */
5 /* Copyright (c) 2006 Martin Quinson. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "xbt/sysdep.h"
12 #include "amok/peermanagement.h"
14 #include "amok/amok_modinter.h" /* prototype of my module declaration */
15 #include "gras/module.h" /* module mecanism */
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_pm,amok,"peer management");
21 int amok_pm_moddata_id=-1;
25 } s_amok_pm_moddata_t, *amok_pm_moddata_t;
28 /* Message callbacks */
29 static int amok_pm_cb_kill(gras_msg_cb_ctx_t ctx,
32 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
36 static int amok_pm_cb_killrpc(gras_msg_cb_ctx_t ctx,
39 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
41 gras_msg_rpcreturn(30,ctx,NULL);
45 static int amok_pm_cb_get(gras_msg_cb_ctx_t ctx, void *payload) {
46 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
47 char *name = *(void**)payload;
48 xbt_dynar_t res = xbt_dict_get(g->groups, name);
50 gras_msg_rpcreturn(30, ctx, &res);
53 static int amok_pm_cb_join(gras_msg_cb_ctx_t ctx, void *payload) {
54 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
55 char *name = *(void**)payload;
56 xbt_dynar_t group = xbt_dict_get(g->groups, name);
58 gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
59 xbt_peer_t dude = xbt_peer_new(gras_socket_peer_name(exp),
60 gras_socket_peer_port(exp));
62 VERB2("Contacted by %s:%d",dude->name,dude->port);
63 xbt_dynar_push(group,&dude);
65 gras_msg_rpcreturn(10, ctx, NULL);
69 static int amok_pm_cb_leave(gras_msg_cb_ctx_t ctx, void *payload) {
70 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
71 char *name = *(void**)payload;
72 xbt_dynar_t group = xbt_dict_get(g->groups, name);
74 gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
75 xbt_peer_t dude = xbt_peer_new(gras_socket_peer_name(exp),
76 gras_socket_peer_port(exp));
81 xbt_dynar_foreach(group, cpt, peer_it) {
82 if (!strcmp(peer_it->name, dude->name) &&
83 peer_it->port == dude->port) {
84 xbt_dynar_cursor_rm (group,&cpt);
88 WARN3("Asked to remove %s:%d from group '%s', but not found. Ignoring",
89 dude->name,dude->port, name);
92 gras_msg_rpcreturn(30, ctx, NULL);
96 static int amok_pm_cb_shutdown(gras_msg_cb_ctx_t ctx, void *payload) {
97 char *name = *(void**)payload;
98 amok_pm_group_shutdown(name);
100 gras_msg_rpcreturn(30, ctx, NULL);
104 /** \brief Enter the main loop of the program. It won't return until we get a kill message. */
105 void amok_pm_mainloop(double timeOut) {
106 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
109 gras_msg_handle(timeOut);
113 /** \brief kill a buddy identified by its peername and port. Note that it is not removed from any group it may belong to. */
114 void amok_pm_kill_hp(char *name,int port) {
115 gras_socket_t sock=gras_socket_client(name,port);
117 gras_socket_close(sock);
120 /** \brief kill a buddy to which we have a socket already. Note that it is not removed from any group it may belong to. */
121 void amok_pm_kill(gras_socket_t buddy) {
122 gras_msg_send(buddy,"amok_pm_kill",NULL);
125 /** \brief kill syncronously a buddy (do not return before its death). Note that it is not removed from any group it may belong to. */
126 void amok_pm_kill_sync(gras_socket_t buddy) {
127 gras_msg_rpccall(buddy,30,"amok_pm_killrpc",NULL,NULL);
131 /** \brief create a new peermanagement group located on local peer
133 * The dynar elements are of type xbt_peer_t
135 xbt_dynar_t amok_pm_group_new(const char *group_name) {
137 xbt_dynar_t res = xbt_dynar_new(sizeof(xbt_peer_t),
138 xbt_peer_free_voidp);
140 xbt_assert0(amok_pm_moddata_id != -1,"Run amok_pm_init first!");
141 g=gras_moddata_by_id(amok_pm_moddata_id);
143 DEBUG1("retrieved groups=%p",g->groups);
145 xbt_dict_set(g->groups,group_name,res,NULL); /*FIXME: leaking xbt_dynar_free_voidp);*/
146 VERB1("Group %s created",group_name);
150 /** \brief retrieve all members of the given remote group */
151 xbt_dynar_t amok_pm_group_get(gras_socket_t master, const char *group_name) {
154 gras_msg_rpccall(master,30,"amok_pm_get", &group_name,&res);
158 /** \brief add current peer to the given remote group */
159 void amok_pm_group_join(gras_socket_t master, const char *group_name) {
160 VERB3("Join group '%s' on %s:%d",
161 group_name,gras_socket_peer_name(master),gras_socket_peer_port(master));
162 gras_msg_rpccall(master,30,"amok_pm_join", &group_name,NULL);
163 VERB3("Joined group '%s' on %s:%d",
164 group_name,gras_socket_peer_name(master),gras_socket_peer_port(master));
166 /** \brief remove current peer from the given remote group if found
168 * If not found, call is ignored
170 void amok_pm_group_leave(gras_socket_t master, const char *group_name) {
171 gras_msg_rpccall(master,30,"amok_pm_leave", &group_name,NULL);
172 VERB3("Leaved group '%s' on %s:%d",
173 group_name,gras_socket_peer_name(master),gras_socket_peer_port(master));
176 /** \brief stops all members of the given local group */
177 void amok_pm_group_shutdown(const char *group_name) {
178 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
179 xbt_dynar_t group = xbt_dict_get(g->groups, group_name);
184 xbt_dynar_foreach(group, cpt, peer_it) {
185 amok_pm_kill_hp(peer_it->name, peer_it->port);
188 xbt_dynar_free(&group);
189 xbt_dict_remove(g->groups,group_name);
191 /** \brief stops all members of the given remote group */
192 void amok_pm_group_shutdown_remote(gras_socket_t master, const char *group_name){
193 gras_msg_rpccall(master,30,"amok_pm_shutdown", &group_name,NULL);
199 * * Module management functions
205 static void _amok_pm_init(void) {
206 /* no world-wide globals */
207 /* Datatype and message declarations */
208 gras_datadesc_type_t pm_group_type = gras_datadesc_dynar(gras_datadesc_by_name("xbt_peer_t"), xbt_peer_free_voidp);
210 gras_msgtype_declare("amok_pm_kill",NULL);
211 gras_msgtype_declare_rpc("amok_pm_killrpc",NULL,NULL);
213 gras_msgtype_declare_rpc("amok_pm_get",
214 gras_datadesc_by_name("string"),
216 gras_msgtype_declare_rpc("amok_pm_join",
217 gras_datadesc_by_name("string"),
219 gras_msgtype_declare_rpc("amok_pm_leave",
220 gras_datadesc_by_name("string"),
223 gras_msgtype_declare_rpc("amok_pm_shutdown",
224 gras_datadesc_by_name("string"),
228 static void _amok_pm_join(void *p) {
229 /* moddata management */
230 amok_pm_moddata_t mod = (amok_pm_moddata_t)p;
235 mod->groups = xbt_dict_new();
238 gras_cb_register("amok_pm_kill", &amok_pm_cb_kill);
239 gras_cb_register("amok_pm_killrpc",&amok_pm_cb_killrpc);
241 gras_cb_register("amok_pm_get", &amok_pm_cb_get);
242 gras_cb_register("amok_pm_join", &amok_pm_cb_join);
243 gras_cb_register("amok_pm_leave", &amok_pm_cb_leave);
244 gras_cb_register("amok_pm_shutdown", &amok_pm_cb_shutdown);
246 static void _amok_pm_exit(void) {
247 /* no world-wide globals */
249 static void _amok_pm_leave(void *p) {
251 amok_pm_moddata_t mod = (amok_pm_moddata_t)p;
254 xbt_dict_free(&mod->groups);
257 gras_cb_unregister("amok_pm_kill", &amok_pm_cb_kill);
258 gras_cb_unregister("amok_pm_killrpc",&amok_pm_cb_killrpc);
260 gras_cb_unregister("amok_pm_get", &amok_pm_cb_get);
261 gras_cb_unregister("amok_pm_join", &amok_pm_cb_join);
262 gras_cb_unregister("amok_pm_leave", &amok_pm_cb_leave);
263 gras_cb_unregister("amok_pm_shutdown", &amok_pm_cb_shutdown);
266 void amok_pm_modulecreate() {
267 gras_module_add("amok_pm", sizeof(s_amok_pm_moddata_t), &amok_pm_moddata_id,
268 &_amok_pm_init,&_amok_pm_exit,&_amok_pm_join,&_amok_pm_leave);
275 * * Old module functions (kept for compatibility)
278 /** \brief Initialize the peer management module. Every process must run it before use */
279 void amok_pm_init() {
280 gras_module_join("amok_pm");
283 /** \brief Finalize the peer management module. Every process should run it after use */
284 void amok_pm_exit() {
285 gras_module_leave("amok_pm");