1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef __MTPD_H__
18#define __MTPD_H__
19
20/* The socket to the server. */
21extern int the_socket;
22
23enum exit_code {
24    SYSTEM_ERROR = 1,
25    NETWORK_ERROR = 2,
26    PROTOCOL_ERROR = 3,
27    CHALLENGE_FAILED = 4,
28    USER_REQUESTED = 5,
29    REMOTE_REQUESTED = 6,
30    PPPD_EXITED = 32,
31};
32
33enum log_level {
34    DEBUG = 0,
35    INFO = 1,
36    WARNING = 2,
37    ERROR = 3,
38    FATAL = 4,
39    LOG_MAX = 4,
40};
41
42void log_print(int level, char *format, ...);
43void create_socket(int family, int type, char *server, char *port);
44void start_pppd(int pppox);
45
46/* Each protocol must implement everything defined in this structure. Note that
47 * timeout intervals are in milliseconds, where zero means forever. To indicate
48 * an error, one should use a negative exit code such as -REMOTE_REQUESTED. */
49struct protocol {
50    /* The name of this protocol. */
51    char *name;
52    /* The number of arguments. */
53    int arguments;
54    /* The usage of the arguments. */
55    char *usage;
56    /* Connect to the server and return the next timeout interval. */
57    int (*connect)(char **arguments);
58    /* Process the incoming packet and return the next timeout interval. */
59    int (*process)();
60    /* Handle the timeout event and return the next timeout interval. */
61    int (*timeout)();
62    /* Handle the shutdown event. */
63    void (*shutdown)();
64};
65
66#endif /* __MTPD_H__ */
67