1 /*
2
3 server_internal.h
4
5 Author: Pekka Riikonen <priikone@silcnet.org>
6
7 Copyright (C) 1997 - 2005 Pekka Riikonen
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 */
19
20 #ifndef SERVER_INTERNAL_H
21 #define SERVER_INTERNAL_H
22
23 /* Server statistics structure. This holds various statistics about
24 various things. */
25 typedef struct {
26 /* Local stats (server and router) */
27 SilcUInt32 my_clients; /* Locally connected clients */
28 SilcUInt32 my_servers; /* Locally connected servers */
29 SilcUInt32 my_routers; /* Locally connected routers */
30 SilcUInt32 my_channels; /* Locally created channels */
31 SilcUInt32 my_chanclients; /* Local clients on local channels */
32 SilcUInt32 my_aways; /* Local clients away (gone) */
33 SilcUInt32 my_detached; /* Local clients detached */
34 SilcUInt32 my_server_ops; /* Local server operators */
35 SilcUInt32 my_router_ops; /* Local router operators */
36
37 /* Global stats (mainly for router) */
38 SilcUInt32 cell_clients; /* All clients in cell */
39 SilcUInt32 cell_servers; /* All servers in cell */
40 SilcUInt32 cell_channels; /* All channels in cell */
41 SilcUInt32 cell_chanclients; /* All clients on cell's channels */
42 SilcUInt32 clients; /* All clients */
43 SilcUInt32 servers; /* All servers */
44 SilcUInt32 routers; /* All routers */
45 SilcUInt32 channels; /* All channels */
46 SilcUInt32 chanclients; /* All clients on channels */
47 SilcUInt32 aways; /* All clients away (gone) */
48 SilcUInt32 detached; /* All clients detached */
49 SilcUInt32 server_ops; /* All server operators */
50 SilcUInt32 router_ops; /* All router operators */
51 /* More to add
52 SilcUInt32 secret_channels;
53 SilcUInt32 private_channels;
54 */
55
56 /* General */
57 SilcUInt32 conn_attempts; /* Connection attempts */
58 SilcUInt32 conn_failures; /* Connection failure */
59 SilcUInt32 auth_attempts; /* Authentication attempts */
60 SilcUInt32 auth_failures; /* Authentication failures */
61 SilcUInt32 packets_sent; /* Sent SILC packets */
62 SilcUInt32 packets_received; /* Received SILC packets */
63 SilcUInt32 conn_num; /* Number of connections */
64 SilcUInt32 commands_sent; /* Commands/replies sent */
65 SilcUInt32 commands_received; /* Commands/replies received */
66 } SilcServerStatistics;
67
68 /*
69 SILC Server Object.
70
71 */
72 struct SilcServerStruct {
73 char *server_name;
74 int sock;
75 SilcServerEntry id_entry;
76 SilcServerID *id;
77 unsigned char *id_string;
78 SilcUInt32 id_string_len;
79 SilcUInt32 starttime;
80
81 unsigned int server_type : 2; /* Server type (server.h) */
82 unsigned int standalone : 1; /* Set if server is standalone, and
83 does not have connection to network. */
84 unsigned int listenning : 1; /* Set if server is listenning for
85 incoming connections. */
86 unsigned int background : 1; /* Set when server is on background */
87 unsigned int backup_router : 1; /* Set if this is backup router */
88 unsigned int backup_primary : 1; /* Set if we've switched our primary
89 router to a backup router. */
90 unsigned int backup_noswitch: 1; /* Set if we've won't switch to
91 become primary (we are backup) */
92 unsigned int backup_closed : 1; /* Set if backup closed connection.
93 Do not allow resuming in this case. */
94 unsigned int wait_backup : 1; /* Set if we are waiting for backup
95 router to connect to us. */
96 unsigned int server_shutdown: 1; /* Set when shutting down */
97 unsigned int no_reconnect : 1; /* If set, server won't reconnect to
98 router after disconnection. */
99
100 SilcServerEntry router; /* Pointer to the primary router */
101 unsigned long router_connect; /* Time when router was connected */
102 SilcServerConnection router_conn; /* non-NULL when connecting to the
103 primary router, and NULL otherwise. */
104 SilcServerBackup backup; /* Backup routers */
105
106 /* Current command identifier, 0 not used */
107 SilcUInt16 cmd_ident;
108
109 /* SILC server scheduler */
110 SilcSchedule schedule;
111
112 /* ID lists. */
113 SilcIDList local_list;
114 SilcIDList global_list;
115 SilcHashTable watcher_list;
116 SilcHashTable watcher_list_pk;
117
118 /* Table of connected sockets */
119 SilcSocketConnection *sockets;
120
121 /* Server public key */
122 SilcPKCS pkcs;
123 SilcPublicKey public_key;
124 SilcPrivateKey private_key;
125
126 /* Hash objects for general hashing */
127 SilcHash md5hash;
128 SilcHash sha1hash;
129
130 /* Configuration object */
131 SilcServerConfig config;
132 SilcServerConfigRef config_ref;
133 char *config_file;
134
135 /* Random pool */
136 SilcRng rng;
137
138 /* Server statistics */
139 SilcServerStatistics stat;
140
141 /* Pending command queue */
142 SilcDList pending_commands;
143
144 /* Purge context for disconnected clients */
145 SilcIDListPurge purge_i;
146 SilcIDListPurge purge_g;
147
148 #ifdef SILC_SIM
149 /* SIM (SILC Module) list */
150 SilcDList sim;
151 #endif
152
153 /* Hash table for public keys of all clients */
154 SilcHashTable pk_hash;
155 };
156
157 /* Failure context. This is allocated when failure packet is received.
158 Failure packets are processed with timeout and data is saved in this
159 structure. */
160 typedef struct {
161 SilcSocketConnection sock;
162 SilcUInt32 failure;
163 } *SilcServerFailureContext;
164
165 /* Rekey must be performed at the lastest when this many packets is sent */
166 #define SILC_SERVER_REKEY_THRESHOLD 0xfffffe00
167
168 /* Macros */
169
170 /* Return pointer to the primary router connection */
171 #define SILC_PRIMARY_ROUTE(server) \
172 (!server->standalone && server->router ? server->router->connection : NULL)
173
174 /* Return TRUE if a packet must be broadcasted (router broadcasts) */
175 #define SILC_BROADCAST(server) (server->server_type == SILC_ROUTER)
176
177 /* Return TRUE if entry is locally connected or local to us */
178 #define SILC_IS_LOCAL(entry) \
179 (((SilcIDListData)entry)->status & SILC_IDLIST_STATUS_LOCAL)
180
181 /* Registers generic task for file descriptor for reading from network and
182 writing to network. As being generic task the actual task is allocated
183 only once and after that the same task applies to all registered fd's. */
184 #define SILC_REGISTER_CONNECTION_FOR_IO(fd) \
185 do { \
186 silc_schedule_task_add(server->schedule, (fd), \
187 silc_server_packet_process, \
188 context, 0, 0, \
189 SILC_TASK_GENERIC, \
190 SILC_TASK_PRI_NORMAL); \
191 } while(0)
192
193 #define SILC_SET_CONNECTION_FOR_INPUT(s, fd) \
194 do { \
195 silc_schedule_set_listen_fd((s), (fd), SILC_TASK_READ, FALSE); \
196 } while(0)
197
198 #define SILC_SET_CONNECTION_FOR_OUTPUT(s, fd) \
199 do { \
200 silc_schedule_set_listen_fd((s), (fd), (SILC_TASK_READ | SILC_TASK_WRITE), \
201 FALSE); \
202 } while(0)
203
204 #define SILC_OPER_STATS_UPDATE(c, type, mod) \
205 do { \
206 if ((c)->mode & (mod)) { \
207 if (SILC_IS_LOCAL((c))) \
208 server->stat.my_ ## type ## _ops--; \
209 if (server->server_type == SILC_ROUTER) \
210 server->stat. type ## _ops--; \
211 (c)->mode &= ~(mod); \
212 } \
213 } while(0)
214
215 #define SILC_UMODE_STATS_UPDATE(oper, mod) \
216 do { \
217 if (client->mode & (mod)) { \
218 if (!(mode & (mod))) { \
219 if (SILC_IS_LOCAL(client)) \
220 server->stat.my_ ## oper ## _ops--; \
221 if (server->server_type == SILC_ROUTER) \
222 server->stat. oper ## _ops--; \
223 } \
224 } else { \
225 if (mode & (mod)) { \
226 if (SILC_IS_LOCAL(client)) \
227 server->stat.my_ ## oper ## _ops++; \
228 if (server->server_type == SILC_ROUTER) \
229 server->stat. oper ## _ops++; \
230 } \
231 } \
232 } while(0)
233
234 #define SILC_GET_SKE_FLAGS(x, p) \
235 if ((x)) { \
236 if ((x)->param && (x)->param->key_exchange_pfs) \
237 (p)->flags |= SILC_SKE_SP_FLAG_PFS; \
238 if (!(x)->publickeys) \
239 (p)->flags |= SILC_SKE_SP_FLAG_MUTUAL; \
240 }
241
242 /* Prototypes */
243 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final);
244 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_callback);
245 SILC_TASK_CALLBACK_GLOBAL(silc_server_connect_to_router);
246 void silc_server_watcher_list_destroy(void *key, void *context,
247 void *user_context);
248
249 #endif
250
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