5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2000 Pekka Riikonen
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; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 #ifndef SILCPROTOCOL_H
22 #define SILCPROTOCOL_H
24 /* Protocol type definition. */
25 typedef unsigned char SilcProtocolType;
27 /* Protocol state definition. */
28 typedef unsigned char SilcProtocolState;
30 /* Protocol states. Do NOT change the values of these states, especially
31 the START state or you break every protocol. */
32 #define SILC_PROTOCOL_STATE_UNKNOWN 0
33 #define SILC_PROTOCOL_STATE_START 1
34 #define SILC_PROTOCOL_STATE_END 252
35 #define SILC_PROTOCOL_STATE_FAILURE 253 /* Received failure from remote */
36 #define SILC_PROTOCOL_STATE_ERROR 254 /* Local error at our end */
38 /* Connection Authentication protocols' authentication methods */
39 #define SILC_PROTOCOL_CONN_AUTH_NONE 0
40 #define SILC_PROTOCOL_CONN_AUTH_PASSWORD 1
41 #define SILC_PROTOCOL_CONN_AUTH_PUBLIC_KEY 2
43 /* XXX These don't belong here really! */
44 /* Connection authentication protocol status message */
45 #define SILC_CONN_AUTH_OK 0
46 #define SILC_CONN_AUTH_FAILED 1
48 /* Type definition for above auth methods */
49 typedef unsigned char SilcProtocolAuthMeth;
54 Short description of the field following:
58 Protocol type. This is enumeration.
60 SilcProtocolCallback callback;
62 Callback function for the protocol. This is SilcTaskCallback function
63 pointer as the protocols in SILC are executed as timeout tasks.
65 The object expands to another structure as well. Short description of
66 these fields following:
68 SilcProtocolObject *protocol
70 This is the pointer to the protocol object defined above.
72 SilcProtocolState state
74 Protocol state. This is enumeration. The state of the protocol can
75 be changed in the callback function.
79 Context to be sent for the callback function. This is usually
80 object for either SILC client or server. However, this abstraction
81 makes it possible that this pointer could be some other object as well.
83 SilcProtocolExecute execute;
85 Executes the protocol and its states. The correct state must be set
86 before calling this function. The state is usually set in the protocol
89 SilcProtocolExecute execute_final;
91 Executes the final callback function of the protocol. Read on.
93 SilcProtocolFinalCallback final_callback;
95 This is a callback function that is called with timeout _after_ the
96 protocol has finished or error occurs. If this is NULL, naturally
97 nothing will be executed. Protocol should call this function only at
98 SILC_PROTOCOL_STATE_END and SILC_PROTOCOL_STATE_ERROR states.
101 typedef SilcTaskCallback SilcProtocolCallback;
103 typedef struct SilcProtocolObjectStruct {
104 SilcProtocolType type;
105 SilcProtocolCallback callback;
107 struct SilcProtocolObjectStruct *next;
108 } SilcProtocolObject;
110 typedef SilcTaskCallback SilcProtocolFinalCallback;
111 typedef SilcTaskCallback SilcProtocolExecute;
113 typedef struct SilcProtocolStruct {
114 SilcProtocolObject *protocol;
115 SilcProtocolState state;
118 // SilcProtocolExecute execute;
119 void (*execute)(void *, int, void *, int, long, long);
120 SilcProtocolExecute execute_final;
121 SilcProtocolFinalCallback final_callback;
125 void silc_protocol_register(SilcProtocolType type,
126 SilcProtocolCallback callback);
127 void silc_protocol_unregister(SilcProtocolType type,
128 SilcProtocolCallback callback);
129 void silc_protocol_alloc(SilcProtocolType type, SilcProtocol *new_protocol,
130 void *context, SilcProtocolFinalCallback callback);
131 void silc_protocol_free(SilcProtocol protocol);
132 void silc_protocol_execute(void *qptr, int type,
133 void *context, int fd,
134 long secs, long usecs);
135 void silc_protocol_execute_final(void *qptr, int type,
136 void *context, int fd);