project_files/frontlib/ipc/ipcprotocol.c
author sheepluva
Fri, 29 Apr 2016 13:12:26 +0200
changeset 11777 927c45b83496
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permissions -rw-r--r--
music credits etc.
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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 "ipcprotocol.h"
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#include "../util/util.h"
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#include "../util/logging.h"
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#include "../md5/md5.h"
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include <inttypes.h>
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#include <stdlib.h>
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int flib_ipc_append_message(flib_vector *vec, const char *fmt, ...) {
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    int result = -1;
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    if(!log_badargs_if2(vec==NULL, fmt==NULL)) {
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        // 1 byte size prefix, 255 bytes max message length, 1 0-byte for vsnprintf
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        char msgbuffer[257];
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        // Format the message, leaving one byte at the start for the length
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        va_list argp;
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        va_start(argp, fmt);
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        int msgSize = vsnprintf(msgbuffer+1, 256, fmt, argp);
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        va_end(argp);
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        if(!log_e_if(msgSize > 255, "Message too long (%u bytes)", (unsigned)msgSize)
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                && !log_e_if(msgSize < 0, "printf error")) {
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            // Add the length prefix
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            ((uint8_t*)msgbuffer)[0] = msgSize;
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            // Append it to the vector
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            result = flib_vector_append(vec, msgbuffer, msgSize+1);
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        }
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    }
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    return result;
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}
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int flib_ipc_append_mapconf(flib_vector *vec, const flib_map *map, bool mappreview) {
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    int result = -1;
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    flib_vector *tempvector = flib_vector_create();
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    if(!log_badargs_if2(vec==NULL, map==NULL)) {
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        bool error = false;
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        if(map->mapgen == MAPGEN_NAMED) {
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            error |= log_e_if(!map->name, "Missing map name")
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                    || flib_ipc_append_message(tempvector, "emap %s", map->name);
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        }
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        if(!mappreview) {
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            error |= log_e_if(!map->theme, "Missing map theme")
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                    || flib_ipc_append_message(tempvector, "etheme %s", map->theme);
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        }
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        error |= flib_ipc_append_seed(tempvector, map->seed);
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        error |= flib_ipc_append_message(tempvector, "e$template_filter %i", map->templateFilter);
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        error |= flib_ipc_append_message(tempvector, "e$mapgen %i", map->mapgen);
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        if(map->mapgen == MAPGEN_MAZE) {
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            error |= flib_ipc_append_message(tempvector, "e$maze_size %i", map->mazeSize);
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        }
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        if(map->mapgen == MAPGEN_DRAWN) {
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            /*
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             * We have to split the drawn map data into several edraw messages here because
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             * it can be longer than the maximum message size.
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             */
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            const char *edraw = "edraw ";
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            int edrawlen = strlen(edraw);
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            for(size_t offset=0; offset<map->drawDataSize; offset+=200) {
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                size_t bytesRemaining = map->drawDataSize-offset;
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                int fragmentsize = bytesRemaining < 200 ? bytesRemaining : 200;
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                uint8_t messagesize = edrawlen + fragmentsize;
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                error |= flib_vector_append(tempvector, &messagesize, 1);
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                error |= flib_vector_append(tempvector, edraw, edrawlen);
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                error |= flib_vector_append(tempvector, map->drawData+offset, fragmentsize);
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            }
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        }
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        if(!log_e_if(error, "Error generating map config")) {
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            // Message created, now we can copy everything.
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            flib_constbuffer constbuf = flib_vector_as_constbuffer(tempvector);
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            if(!flib_vector_append(vec, constbuf.data, constbuf.size)) {
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                result = 0;
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            }
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        }
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    }
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    flib_vector_destroy(tempvector);
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    return result;
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}
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int flib_ipc_append_seed(flib_vector *vec, const char *seed) {
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    if(log_badargs_if2(vec==NULL, seed==NULL)) {
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        return -1;
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    }
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    return flib_ipc_append_message(vec, "eseed %s", seed);
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}
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int flib_ipc_append_script(flib_vector *vec, const char *script) {
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    int result = -1;
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    if(!log_badargs_if2(vec==NULL, script==NULL)) {
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        result = flib_ipc_append_message(vec, "escript %s", script);
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    }
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    return result;
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}
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int flib_ipc_append_style(flib_vector *vec, const char *style) {
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    int result = -1;
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    char *copy = flib_strdupnull(style);
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    if(!log_badargs_if(vec==NULL) && copy) {
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        if(!strcmp("Normal", copy)) {
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            // "Normal" means no gametype script
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            // TODO if an empty script called "Normal" is added to the scripts directory this can be removed
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            result = 0;
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        } else {
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            size_t len = strlen(copy);
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            for(size_t i=0; i<len; i++) {
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                if(copy[i] == ' ') {
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                    copy[i] = '_';
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                }
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            }
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            result = flib_ipc_append_message(vec, "escript %s%s.lua", MULTIPLAYER_SCRIPT_PATH, copy);
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        }
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    }
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    free(copy);
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    return result;
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}
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static uint32_t buildModFlags(const flib_scheme *scheme) {
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    uint32_t result = 0;
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    for(int i=0; i<flib_meta.modCount; i++) {
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        if(scheme->mods[i]) {
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            int bitmaskIndex = flib_meta.mods[i].bitmaskIndex;
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            result |= (UINT32_C(1) << bitmaskIndex);
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        }
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    }
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    return result;
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}
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int flib_ipc_append_gamescheme(flib_vector *vec, const flib_scheme *scheme) {
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    int result = -1;
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    flib_vector *tempvector = flib_vector_create();
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    if(!log_badargs_if2(vec==NULL, scheme==NULL) && tempvector) {
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        bool error = false;
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        error |= flib_ipc_append_message(tempvector, "e$gmflags %"PRIu32, buildModFlags(scheme));
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        for(int i=0; i<flib_meta.settingCount; i++) {
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            if(flib_meta.settings[i].engineCommand) {
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                int value = scheme->settings[i];
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                if(flib_meta.settings[i].maxMeansInfinity) {
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                    value = value>=flib_meta.settings[i].max ? 9999 : value;
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                }
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                if(flib_meta.settings[i].times1000) {
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                    value *= 1000;
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                }
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                error |= flib_ipc_append_message(tempvector, "%s %i", flib_meta.settings[i].engineCommand, value);
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            }
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        }
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   172
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        if(!error) {
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            // Message created, now we can copy everything.
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            flib_constbuffer constbuf = flib_vector_as_constbuffer(tempvector);
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            if(!flib_vector_append(vec, constbuf.data, constbuf.size)) {
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                result = 0;
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            }
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        }
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    }
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    flib_vector_destroy(tempvector);
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    return result;
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}
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   184
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static int appendWeaponSet(flib_vector *vec, flib_weaponset *set) {
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    return flib_ipc_append_message(vec, "eammloadt %s", set->loadout)
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        || flib_ipc_append_message(vec, "eammprob %s", set->crateprob)
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        || flib_ipc_append_message(vec, "eammdelay %s", set->delay)
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        || flib_ipc_append_message(vec, "eammreinf %s", set->crateammo);
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}
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   191
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   192
static void calculateMd5Hex(const char *in, char out[33]) {
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    md5_state_t md5state;
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    uint8_t md5bytes[16];
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    md5_init(&md5state);
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    md5_append(&md5state, (unsigned char*)in, strlen(in));
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    md5_finish(&md5state, md5bytes);
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    for(int i=0;i<sizeof(md5bytes); i++) {
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        snprintf(out+i*2, 3, "%02x", (unsigned)md5bytes[i]);
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    }
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}
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   202
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static int flib_ipc_append_addteam(flib_vector *vec, const flib_team *team, bool perHogAmmo, bool noAmmoStore) {
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    int result = -1;
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    flib_vector *tempvector = flib_vector_create();
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    if(!log_badargs_if2(vec==NULL, team==NULL) && tempvector) {
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        bool error = false;
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   208
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        if(!perHogAmmo && !noAmmoStore) {
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            error = error
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                    || appendWeaponSet(tempvector, team->hogs[0].weaponset)
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                    || flib_ipc_append_message(tempvector, "eammstore");
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        }
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   214
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        char md5Hex[33];
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        calculateMd5Hex(team->ownerName ? team->ownerName : "", md5Hex);
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        if(team->colorIndex<0 || team->colorIndex>=flib_teamcolor_count) {
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            flib_log_e("Color index out of bounds for team %s: %i", team->name, team->colorIndex);
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            error = true;
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   220
        } else {
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            error |= flib_ipc_append_message(tempvector, "eaddteam %s %"PRIu32" %s", md5Hex, flib_teamcolors[team->colorIndex], team->name);
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   222
        }
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   223
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   224
        if(team->remoteDriven) {
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            error |= flib_ipc_append_message(tempvector, "erdriven");
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        }
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   227
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        error |= flib_ipc_append_message(tempvector, "egrave %s", team->grave);
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        error |= flib_ipc_append_message(tempvector, "efort %s", team->fort);
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        error |= flib_ipc_append_message(tempvector, "evoicepack %s", team->voicepack);
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        error |= flib_ipc_append_message(tempvector, "eflag %s", team->flag);
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   232
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        for(int i=0; i<team->bindingCount; i++) {
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            error |= flib_ipc_append_message(tempvector, "ebind %s %s", team->bindings[i].binding, team->bindings[i].action);
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        }
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   236
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        for(int i=0; i<team->hogsInGame; i++) {
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            if(perHogAmmo && !noAmmoStore) {
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                error |= appendWeaponSet(tempvector, team->hogs[i].weaponset);
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   240
            }
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            error |= flib_ipc_append_message(tempvector, "eaddhh %i %i %s", team->hogs[i].difficulty, team->hogs[i].initialHealth, team->hogs[i].name);
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            error |= flib_ipc_append_message(tempvector, "ehat %s", team->hogs[i].hat);
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   243
        }
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   244
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        if(!error) {
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   246
            // Message created, now we can copy everything.
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   247
            flib_constbuffer constbuf = flib_vector_as_constbuffer(tempvector);
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            if(!flib_vector_append(vec, constbuf.data, constbuf.size)) {
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   249
                result = 0;
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   250
            }
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   251
        }
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   252
    }
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    flib_vector_destroy(tempvector);
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   254
    return result;
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   255
}
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   256
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   257
int flib_ipc_append_fullconfig(flib_vector *vec, const flib_gamesetup *setup, bool netgame) {
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   258
    int result = -1;
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   259
    flib_vector *tempvector = flib_vector_create();
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   260
    if(!log_badargs_if2(vec==NULL, setup==NULL) && tempvector) {
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   261
        bool error = false;
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        bool perHogAmmo = false;
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   263
        bool sharedAmmo = false;
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   264
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   265
        error |= flib_ipc_append_message(vec, netgame ? "TN" : "TL");
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   266
        if(setup->map) {
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   267
            error |= flib_ipc_append_mapconf(tempvector, setup->map, false);
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   268
        }
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   269
        if(setup->style) {
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   270
            error |= flib_ipc_append_style(tempvector, setup->style);
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   271
        }
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   272
        if(setup->gamescheme) {
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   273
            error |= flib_ipc_append_gamescheme(tempvector, setup->gamescheme);
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   274
            sharedAmmo = flib_scheme_get_mod(setup->gamescheme, "sharedammo");
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   275
            // Shared ammo has priority over per-hog ammo
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            perHogAmmo = !sharedAmmo && flib_scheme_get_mod(setup->gamescheme, "perhogammo");
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   277
        }
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   278
        if(setup->teamlist->teams && setup->teamlist->teamCount>0) {
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   279
            int *clanColors = flib_calloc(setup->teamlist->teamCount, sizeof(int));
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   280
            if(!clanColors) {
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   281
                error = true;
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   282
            } else {
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   283
                int clanCount = 0;
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   284
                for(int i=0; !error && i<setup->teamlist->teamCount; i++) {
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   285
                    flib_team *team = setup->teamlist->teams[i];
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   286
                    // Find the clan index of this team (clans are identified by color).
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   287
                    bool newClan = false;
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   288
                    int clan = 0;
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   289
                    while(clan<clanCount && clanColors[clan] != team->colorIndex) {
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   290
                        clan++;
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   291
                    }
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   292
                    if(clan==clanCount) {
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   293
                        newClan = true;
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   294
                        clanCount++;
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   295
                        clanColors[clan] = team->colorIndex;
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   296
                    }
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   297
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   298
                    // If shared ammo is active, only add an ammo store for the first team in each clan.
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   299
                    bool noAmmoStore = sharedAmmo&&!newClan;
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   300
                    error |= flib_ipc_append_addteam(tempvector, setup->teamlist->teams[i], perHogAmmo, noAmmoStore);
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   301
                }
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   302
            }
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   303
            free(clanColors);
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   304
        }
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   305
        error |= flib_ipc_append_message(tempvector, "!");
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   306
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   307
        if(!error) {
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   308
            // Message created, now we can copy everything.
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   309
            flib_constbuffer constbuf = flib_vector_as_constbuffer(tempvector);
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   310
            if(!flib_vector_append(vec, constbuf.data, constbuf.size)) {
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   311
                result = 0;
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diff changeset
   312
            }
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   313
        }
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diff changeset
   314
    }
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 7497
diff changeset
   315
    return result;
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 7497
diff changeset
   316
}