project_files/frontlib/net/netprotocol.c
author Medo <smaxein@googlemail.com>
Wed, 11 Jul 2012 01:40:35 +0200
changeset 7324 fb6bfe8e30c8
parent 7320 e704706008d4
child 7338 1ed603a54ebd
permissions -rw-r--r--
frontlib: Added missing disconnect case
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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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#include "netprotocol.h"
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#include "../util/util.h"
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#include "../util/logging.h"
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#include "../base64/base64.h"
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#include <zlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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static int fillTeamFromMsg(flib_team *team, char **parts) {
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	team->name = flib_strdupnull(parts[0]);
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	team->grave = flib_strdupnull(parts[1]);
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	team->fort = flib_strdupnull(parts[2]);
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	team->voicepack = flib_strdupnull(parts[3]);
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	team->flag = flib_strdupnull(parts[4]);
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	team->ownerName = flib_strdupnull(parts[5]);
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	if(!team->name || !team->grave || !team->fort || !team->voicepack || !team->flag || !team->ownerName) {
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		return -1;
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	}
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	errno = 0;
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	long difficulty = strtol(parts[6], NULL, 10);
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	if(errno) {
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		return -1;
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	}
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	for(int i=0; i<HEDGEHOGS_PER_TEAM; i++) {
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		flib_hog *hog = &team->hogs[i];
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		hog->difficulty = difficulty;
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		hog->name = flib_strdupnull(parts[7+2*i]);
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		hog->hat = flib_strdupnull(parts[8+2*i]);
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		if(!hog->name || !hog->hat) {
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			return -1;
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		}
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	}
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	return 0;
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}
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flib_team *flib_team_from_netmsg(char **parts) {
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	flib_team *result = NULL;
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	flib_team *tmpTeam = flib_calloc(1, sizeof(flib_team));
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	if(tmpTeam) {
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		if(!fillTeamFromMsg(tmpTeam, parts)) {
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			result = tmpTeam;
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			tmpTeam = NULL;
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		} else {
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			flib_log_e("Error parsing team from net.");
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		}
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	}
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	flib_team_destroy(tmpTeam);
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	return result;
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}
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flib_scheme *flib_netmsg_to_cfg(flib_metascheme *meta, char **parts) {
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	flib_scheme *result = flib_scheme_create(meta, parts[0]);
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	if(result) {
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		for(int i=0; i<meta->modCount; i++) {
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			result->mods[i] = !strcmp(parts[i+1], "true");
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		}
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		for(int i=0; i<meta->settingCount; i++) {
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			result->settings[i] = atoi(parts[i+meta->modCount+1]);
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		}
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	}
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	return result;
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}
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flib_map *flib_netmsg_to_map(char **parts) {
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	flib_map *result = flib_map_create_named(parts[3], parts[0]);
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	if(result) {
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		result->mapgen = atoi(parts[1]);
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		result->mazeSize = atoi(parts[2]);
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		result->templateFilter = atoi(parts[4]);
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	}
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	return result;
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}
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int flib_netmsg_to_drawnmapdata(char *netmsg, uint8_t** outbuf, size_t *outlen) {
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	int result = -1;
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	// First step: base64 decoding
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	char *base64decout = NULL;
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	size_t base64declen;
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	bool ok = base64_decode_alloc(netmsg, strlen(netmsg), &base64decout, &base64declen);
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	if(ok && base64declen>3) {
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		// Second step: unzip with the QCompress header. That header is just a big-endian
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		// uint32 indicating the length of the uncompressed data.
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		uint8_t *ubyteBuf = (uint8_t*)base64decout;
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		uint32_t unzipLen =
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				(((uint32_t)ubyteBuf[0])<<24)
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				+ (((uint32_t)ubyteBuf[1])<<16)
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				+ (((uint32_t)ubyteBuf[2])<<8)
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				+ ubyteBuf[3];
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		if(unzipLen==0) {
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			*outbuf = NULL;
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			*outlen = 0;
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			result = 0;
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		} else {
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			uint8_t *out = flib_malloc(unzipLen);
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			if(out) {
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				uLongf actualUnzipLen = unzipLen;
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				int resultcode = uncompress(out, &actualUnzipLen, (Bytef*)(base64decout+4), base64declen-4);
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				if(resultcode == Z_OK) {
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					*outbuf = out;
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					*outlen = actualUnzipLen;
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					out = NULL;
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					result = 0;
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				} else {
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					flib_log_e("Uncompressing drawn map failed. Code: %i", resultcode);
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				}
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			}
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			free(out);
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		}
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	} else {
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		flib_log_e("base64 decoding of drawn map failed.");
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	}
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	free(base64decout);
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	return result;
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}