mtpd.h revision 04bd5fc5f03afd5de3e977f67ca644436407b211 
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#if !defined(PX_PROTO_OLAC)
21#define USING_UAPI
22#endif
23
24#if defined(USING_UAPI)
25/* This stuff isn't in uapi. */
26#define PX_PROTO_OLAC 3
27#define PX_PROTO_OPNS 4
28
29struct sockaddr_pppopns {
30 sa_family_t sa_family;
31 unsigned int sa_protocol;
32 int tcp_socket;
33 uint16_t local;
34 uint16_t remote;
35} __attribute__((packed));
36
37struct sockaddr_pppolac {
38 sa_family_t sa_family;
39 unsigned int sa_protocol;
40 int udp_socket;
41 struct __attribute__((packed)) {
42   uint16_t tunnel;
43   uint16_t session;
44 } local, remote;
45} __attribute__((packed));
46#endif
47
48/* The socket to the server. */
49extern int the_socket;
50
51enum exit_code {
52    SYSTEM_ERROR = 1,
53    NETWORK_ERROR = 2,
54    PROTOCOL_ERROR = 3,
55    CHALLENGE_FAILED = 4,
56    USER_REQUESTED = 5,
57    REMOTE_REQUESTED = 6,
58    PPPD_EXITED = 32,
59};
60
61enum log_level {
62    DEBUG = 0,
63    INFO = 1,
64    WARNING = 2,
65    ERROR = 3,
66    FATAL = 4,
67    LOG_MAX = 4,
68};
69
70void log_print(int level, char *format, ...);
71void create_socket(int family, int type, char *server, char *port);
72void start_pppd(int pppox);
73
74/* Each protocol must implement everything defined in this structure. Note that
75 * timeout intervals are in milliseconds, where zero means forever. To indicate
76 * an error, one should use a negative exit code such as -REMOTE_REQUESTED. */
77struct protocol {
78    /* The name of this protocol. */
79    char *name;
80    /* The number of arguments. */
81    int arguments;
82    /* The usage of the arguments. */
83    char *usage;
84    /* Connect to the server and return the next timeout interval. */
85    int (*connect)(char **arguments);
86    /* Process the incoming packet and return the next timeout interval. */
87    int (*process)();
88    /* Handle the timeout event and return the next timeout interval. */
89    int (*timeout)();
90    /* Handle the shutdown event. */
91    void (*shutdown)();
92};
93
94#endif /* __MTPD_H__ */
95