2 * Copyright (C) 1997-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file server.h Common server data structures. */
9 /** Size of the selector_info and audio_file info strings of struct misc_meta_data. */
10 #define MMD_INFO_SIZE 16384
12 /** The maximum length of the host component in an URL */
13 #define MAX_HOSTLEN 256
16 * Defines one command of para_server.
18 struct server_command {
19 /** The name of the command. */
21 /** Pointer to the function that handles the command. */
22 int (*handler)(int, int, char * const * const);
23 /** The privileges a user must have to execute this command. */
25 /** One-line description of the command. */
26 const char *description;
27 /** Summary of the command line options. */
29 /** The long help text. */
33 /** Holds the arguments for the para_server's sender command. */
34 struct sender_command_data{
35 /** Greater than 0 indicates that a sender cmd is already queued. */
37 /** The number of the sender in question. */
39 /** Used for the allow/deny/add/remove subcommands. */
40 char host[MAX_HOSTLEN];
41 /** Used for allow/deny. */
43 /** The port number for add/remove. */
48 * Used for parent-child communication.
50 * There's only one struct of this type which lives in shared memory
51 * for communication between the server instances. Access to this
52 * area is serialized via mmd_lock() and mmd_unlock(). There are two
53 * reasons for a variable to be included here:
55 * - At least one command (i.e. child of the server) must be able to
60 * - The contents are listed in the stat command and have to be up to
63 struct misc_meta_data {
64 /** The size of the current audio file in bytes. */
66 /** The last modification time of the current audio file. */
68 /** The "old" status flags -- commands may only read them. */
69 unsigned int vss_status_flags;
70 /** The new status flags -- commands may set them. */
71 unsigned int new_vss_status_flags;
72 /** The number of data chunks sent for the current audio file. */
73 long unsigned chunks_sent;
74 /** Set by the jmp/ff commands to the new position in chunks. */
75 long unsigned repos_request;
76 /** The number of the chunk currently sent out. */
77 long unsigned current_chunk;
78 /** The milliseconds that have been skipped of the current audio file. */
80 /** The time para_server started to stream. */
81 struct timeval stream_start;
85 * Commands may increase this to force a status update to be sent to all
89 /** The number of audio files already sent. */
90 unsigned int num_played;
91 /** The number of executed commands. */
92 unsigned int num_commands;
93 /** The number of connections para_server received so far. */
94 unsigned int num_connects;
95 /** The number of connections currently active. */
96 unsigned int active_connections;
97 /** The process id of the audio file selector. */
99 /** This gets updated by afs and contains its current mode. */
100 char afs_mode_string[MAXLINE];
101 /** Used by the sender command. */
102 struct sender_command_data sender_cmd_data;
103 /** Describes the current audio file. */
104 struct audio_file_data afd;
107 /** Command line options for para_server. */
108 extern struct server_args_info conf;
110 __noreturn void handle_connect(int fd, const char *peername);
111 void parse_config_or_die(int override);