project_files/frontlib/net/netbase.h
author Wuzzy <Wuzzy2@mail.ru>
Sun, 07 Apr 2019 19:26:16 +0200
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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 */
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/*
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 * Low-level protocol support for the network connection
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 */
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#ifndef NETBASE_H_
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#define NETBASE_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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struct _flib_netbase;
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typedef struct _flib_netbase flib_netbase;
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typedef struct {
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    int partCount;
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    char **parts;
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} flib_netmsg;
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/**
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 * Start a connection to the specified Hedgewars server.
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 *
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 * Returns NULL on error. Destroy the created object with flib_netconn_destroy.
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 */
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flib_netbase *flib_netbase_create(const char *server, uint16_t port);
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/**
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 * Free resources and close sockets.
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 */
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void flib_netbase_destroy(flib_netbase *net);
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/**
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 * Determine the current connection state. Starts out true, and turns to
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 * false when we are disconnected from the server.
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 */
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bool flib_netbase_connected(flib_netbase *net);
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/**
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 * Receive a new message and return it as a flib_netmsg. The netmsg has to be
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 * destroyed with flib_netmsg_destroy after use.
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 * Returns NULL if no message is available.
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 *
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 * Note: When a connection is closed, you probably want to call this function until
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 * no further message is returned, to ensure you see all messages that were sent
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 * before the connection closed.
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 */
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flib_netmsg *flib_netbase_recv_message(flib_netbase *net);
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int flib_netbase_send_raw(flib_netbase *net, const void *data, size_t len);
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/**
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 * Write a single message to the server. This call blocks until the
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 * message is completely written or the connection is closed or an error occurs.
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 *
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 * Returns a negative value on failure.
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 */
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int flib_netbase_send_message(flib_netbase *net, const flib_netmsg *msg);
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/**
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 * Send a message printf-style.
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 *
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 * flib_netbase_sendf(net, "%s\n\n", "TOGGLE_READY");
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 * flib_netbase_sendf(net, "%s\n%s\n%i\n\n", "CFG", "MAPGEN", MAPGEN_MAZE);
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 */
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int flib_netbase_sendf(flib_netbase *net, const char *format, ...);
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flib_netmsg *flib_netmsg_create();
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void flib_netmsg_destroy(flib_netmsg *msg);
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int flib_netmsg_append_part(flib_netmsg *msg, const void *param, size_t len);
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#endif /* NETBASE_H_ */
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