#include "global.h"
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include "image.h"
#include "newserver.h"
#include "server.h"
#include "sockproto.h"
#include "sproto.h"

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Data Structures
struct	client_cmd_mapping

struct	player_cmd_mapping

Typedefs
typedef void(*	func_uint8_int_ns )(char , int, socket_struct )

typedef void(*	func_uint8_int_pl )(char , int, player )

Functions
static void	block_until_new_connection (void)

bool	connection_alive (socket_struct socket)

void	do_server (void)

void	handle_client (socket_struct ns, player pl)

static int	handle_cmd (socket_struct ns, player pl, char cmd, char data, int len)

static int	is_fd_valid (int fd)

static void	new_connection (int listen_fd)

void	request_info_cmd (char buf, int len, socket_struct ns)

Variables
static const struct client_cmd_mapping	client_commands []

static const struct player_cmd_mapping	player_commands []

unsigned long	todtick

Detailed Description

Main client/server loops.

Date: 2003-12-02

Mainly deals with initialization and higher level socket maintenance (checking for lost connections and if data has arrived.) The reading of data is handled in lowlevel.c

Definition in file loop.c.

Typedef Documentation

typedef void(* func_uint8_int_ns)(char *, int, socket_struct *)

Prototype for functions the client sends without player interaction.

Definition at line 62 of file loop.c.

typedef void(* func_uint8_int_pl)(char *, int, player *)

Prototype for functions used to handle player actions.

Definition at line 71 of file loop.c.

Function Documentation

static void block_until_new_connection ( void )

static

Waits for new connection when there is no one connected.

Definition at line 333 of file loop.c.

References Socket_Info::allocated_sockets, Settings::fastclock, flush_old_maps(), init_sockets, socket_struct::listen, llevInfo, LOG(), Socket_Info::max_filedescriptor, metaserver_update(), Ns_Add, reset_sleep(), settings, socket_info, tick_the_clock(), and watchdog().

Referenced by do_server().

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bool connection_alive ( socket_struct socket )

Check whether the given socket's connection is alive or not.

Returns: True if connection is active, false if not.

Definition at line 480 of file loop.c.

References BEAT_INTERVAL, socket_struct::heartbeat, socket_struct::last_tick, and tick_length().

Referenced by do_server().

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void do_server ( void )

This checks the sockets for input and exceptions, does the right thing.

A bit of this code is grabbed out of socket.c There are 2 lists we need to look through - init_sockets is a list

Definition at line 501 of file loop.c.

References Socket_Info::allocated_sockets, block_until_new_connection(), socket_struct::can_write, cmd_shutdown_time, connection_alive(), obj::container, CS_LOGTIME, cst_lst, draw_client_map(), esrv_draw_look(), esrv_send_inventory(), esrv_update_item(), esrv_update_stats(), socket_struct::fd, final_free_player(), first_player, free_newsocket(), handle_client(), socket_struct::host, init_listening_socket(), init_sockets, is_fd_valid(), socket_struct::last_tick, pl::last_weight, leave(), llevDebug, llevError, llevInfo, LOG(), Socket_Info::max_filedescriptor, obj::name, new_connection(), pl::next, Ns_Add, Ns_Avail, Ns_Dead, pl::ob, save_player(), send_tick(), shutdown_flag, pl::socket, socket_info, ST_PLAYING, pl::state, socket_struct::status, socket_struct::tick, CS_Stats::time_start, Socket_Info::timeout, UPD_WEIGHT, socket_struct::update_inventory, socket_struct::update_look, WEIGHT, write_cs_stats(), and write_socket_buffer().

Referenced by server_main().

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void handle_client	(	socket_struct *	ns,
		player *	pl
	)

Handle commands from a client. This function should only be called when the socket is readable. If an error occurs, the socket status will be set to Ns_Dead; it is up to the caller to clean it up.

Parameters

ns	Socket sending the command
pl	Player associated with this socket, or NULL

Definition at line 234 of file loop.c.

References SockList::buf, socket_struct::faces_sent, socket_struct::fd, handle_cmd(), socket_struct::inbuf, socket_struct::last_tick, SockList::len, Ns_Dead, pl::ob, SockList_NullTerminate(), SockList_ReadPacket(), SockList_ResetRead(), obj::speed_left, ST_PLAYING, pl::state, socket_struct::status, and strtok_r.

Referenced by do_server(), and handle_newcs_player().

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static int handle_cmd	(	socket_struct *	ns,
		player *	pl,
		char *	cmd,
		char *	data,
		int	len
	)

static

Definition at line 195 of file loop.c.

References client_cmd_mapping::cmdname, player_cmd_mapping::cmdname, client_cmd_mapping::cmdproc, player_cmd_mapping::cmdproc, player_cmd_mapping::flag, socket_struct::host, llevDebug, LOG(), ST_PLAYING, and pl::state.

Referenced by handle_client().

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static int is_fd_valid ( int fd )

static

Checks if file descriptor is valid.

Parameters

fd	file descriptor to check.

Returns: 1 if fd is valid, 0 else.

Definition at line 395 of file loop.c.

Referenced by do_server().

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static void new_connection ( int listen_fd )

static

Handle a new connection from a client.

Parameters

listen_fd file descriptor the request came from.

Definition at line 407 of file loop.c.

References Socket_Info::allocated_sockets, checkbanned(), socket_struct::faces_sent, socket_struct::faces_sent_len, fatal(), socket_struct::fd, init_connection(), init_sockets, socket_struct::listen, llevDebug, llevError, llevInfo, LOG(), MAX_BUF, nrofpixmaps, Ns_Avail, OUT_OF_MEMORY, SEE_LAST_ERROR, snprintf, socket_info, socklen_t, and socket_struct::status.

Referenced by do_server().

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void request_info_cmd	(	char *	buf,
		int	len,
		socket_struct *	ns
	)

request_info_cmd is sort of a meta command. There is some specific request of information, but we call other functions to provide that information.

Parameters

buf	buffer containing the information requested.
len	length of buf, ignored.
ns	socket to write data to.

Definition at line 133 of file loop.c.

References socket_struct::host, knowledge_send_info(), llevDebug, LOG(), send_class_info(), send_class_list(), send_exp_table(), send_file(), send_image_info(), send_image_sums(), send_map_info(), send_new_char_info(), send_race_info(), send_race_list(), send_skill_info(), send_spell_paths(), Send_With_Handling(), SockList_AddString(), SockList_Init(), and SockList_Term().

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Variable Documentation

const struct client_cmd_mapping client_commands[]

static

Initial value:

= {
    { "addme",               add_me_cmd },
    { "askface",             send_face_cmd },             
    { "beat",                NULL },
    { "requestinfo",         request_info_cmd },
    { "setup",               set_up_cmd },
    { "version",             version_cmd },
    { "asksmooth",           ask_smooth_cmd },            
    { "accountlogin",       account_login_cmd },
    { "accountnew",         account_new_cmd },
    { "accountaddplayer",   account_add_player_cmd },
    { "accountplay",        account_play_cmd },
    { "accountpw",          account_password },
    { "createplayer",       create_player_cmd },
    { NULL,                  NULL }                       
}

Commands sent directly by client, when connecting or when needed.

Definition at line 108 of file loop.c.

const struct player_cmd_mapping player_commands[]

static

Initial value:

= {
    { "examine",    examine_cmd,                       1 },
    { "apply",      apply_cmd,                         1 },
    { "move",       move_cmd,                          1 },
    { "reply",      reply_cmd,                         0 },
    { "ncom",       (func_uint8_int_pl)new_player_cmd, 1 },
    { "lookat",     look_at_cmd,                       1 },
    { "lock",       (func_uint8_int_pl)lock_item_cmd,  1 },
    { "mark",       (func_uint8_int_pl)mark_item_cmd,  1 },
    { "inscribe",   inscribe_scroll_cmd,               0 },
    { NULL,         NULL,                              0 }   
}

Dispatch tables for the server.

CmdMapping is the dispatch table for the server, used in handle_client, which gets called when the client has input. All commands called here use the same parameter form (char *data, int len, int clientnum. We do implicit casts, because the data that is being passed is unsigned (pretty much needs to be for binary data), however, most of these treat it only as strings, so it makes things easier to cast it here instead of a bunch of times in the function itself. flag is 1 if the player must be in the playing state to issue the command, 0 if they can issue it at any time.Commands sent by the client reacting to player's actions.

Definition at line 94 of file loop.c.

unsigned long todtick

Ingame time

Definition at line 441 of file init.c.

Referenced by init_clocks(), and write_todclock().

Data Structures

Typedefs

Functions

Variables

Detailed Description

Typedef Documentation

Function Documentation

Variable Documentation