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server.c
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server.c
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/* Custom space-pong library's header file */
#include "pong_lib.h"
/* PBM765 allowed libraries */
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
#include <netdb.h>
/* Global default constants */
#define DEFAULT_MAX_CLIENTS 4
#define DEFAULT_HOSTNAME "localhost"
#define DEFAULT_PORT 6969
#define DEFAULT_SHARED_MEMORY_SIZE 1024
#define BIGGEST_BUFFER 10000
#define MAX_CLIENTS 10
#define PORT 12348
#define SHARED_MEMORY_SIZE 10000
#define GAME_STATE_SIZE 10000
#define MAX_INCOMING_PACKET_SIZE 300
#define ARRAY_INDEX(array, string_idx) ((array) + (string_idx) * MAX_INCOMING_PACKET_SIZE * 2)
/* Global variables */
/* Predefined example packets for tests (integers in BIG endian (Network byte order)) */
/* P2 ACCEPT DIV NPK P SIZE DATA maybe checksum not 4 CS DIV */
char pack2[15] = {'-','-', 0,0,0,0, 2, 0,0,0,1, 1, 2, '-','-'};
/* P3 MESSAGE DIV NPK P SIZE DATA CS DIV */
char pack3[272] = {'-','-', 0,0,0,1, 3, 0,0,1,2, /* TA S MESSAGE */
-1, 0, 'T','h','i','s',' ','i','s',' ','m','e','s','s','a','g','e','!',0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* CS DIV */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 136, '-','-'};
/* P4 LOBBY DIV NPK P SIZE= 1+N*21 DATA */
char pack4[99] = {'-','-', 0,0,0,2, 4, 0,0,0,0,/* player count Id Player name */
1, 0, 'N','a','me','e','1',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1, 'N','a','me','e','2',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
2, 'N','a','me','e','1',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
3, 'N','a','me','e','2',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/* CS? DIV */
/* Game ready 202?*/ 1, '-','-'};
char pack5[205] = {'-','-', 0,0,0,3, 5, 0,0,0,0, /* wind width wind height team cnt */
0,0,0,0 ,0,0,0,0 ,2,
/* id goal xCor goal Ycoor en goal X en goal Y*/
/*X team count */ 0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
1, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* Player cnt*/
4,
/* pl id ready team id name xCoor Ycoor width height*/
/* reiz player cnt */ 0, 0, 0, 'N','a','m','e','1',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
1, 0, 0, 'N','a','m','e','2',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
2, 0, 1, 'N','a','m','e','3',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
3, 0, 1, 'N','a','m','e','4',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* CS DIV */
1, '-','-'};
/* Game state*/
char pack7[159] = {'-','-', 0,0,0,3, 7, 0,0,0,0, /* wind width wind height team cnt */
0,0,0,0 ,0,0,0,0 ,2,
/* id goal xCor goal Ycoor en goal X en goal Y*/
/*X team count */ 0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
1, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* Player cnt*/
4,
/* pl id team id xCoor Ycoor width height*/
/* reiz player cnt */ 0, 0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
1, 0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
2, 1, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
3, 1, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* ball cnt X Y Radius Type*/
1, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,
/* powerUp cnt Type X Y Width Height*/
1, 0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* CS DIV */
1, '-','-'};
void update_game_state();
int get_writeable_packet_in_buffer( int id);
char* createPackage2(char status, int package_number);
char* createPackage3(char* data_segment, int package_number);
char* createPackage4( int package_number);
char* block = NULL;
char* game_state_block = NULL;
char* shared_memory = NULL;
int client_count = 0;
int* shared_data = NULL;
int* total_bytes_used = 0;
char* game_state = NULL;
/* Game state pointers */
float* window_width=NULL;
float* window_height=NULL;
char* team_cnt = NULL;
char* player_cnt = NULL;
char* ball_cnt = NULL;
char* powerup_cnt = NULL;
char* array_of_client_buffers = NULL;
/* Comment */
int get_writable_packet_in_buffer(int id){
char available = ARRAY_INDEX(block, id)[0];
char available2 = ARRAY_INDEX(block, id)[MAX_INCOMING_PACKET_SIZE];
/* First mode... Comment */
if (available == '0'){
ARRAY_INDEX(block, id)[0] = '1';
return 1;
}
/* Second mode... Comment */
else if (available2 == '0'){
ARRAY_INDEX(block, id)[MAX_INCOMING_PACKET_SIZE] = '1';
return 2;
}
/* If packet is unreadable, returns an error */
else {
printf("Error: game state is undefined! (state: %c)\n", ARRAY_INDEX(block, 0)[0]);
return -1;
}
}
/* Updates the game state in memory block */
void update_game_state(){
/* Updates the game state from 1 to 0 */
if (ARRAY_INDEX(block, 0)[0] == '1'){
ARRAY_INDEX(block, 0)[0] = '0';
} else {
/* If changing failed, throws an error */
printf("Error: game state is undefined! (state: %c)\n", ARRAY_INDEX(block, 0)[0]);
}
}
/* Gets shared memory */
void get_shared_memory(){
int i;
/* Packet shared memory */
block = attach_memory_block(FILENAME, MAX_INCOMING_PACKET_SIZE*2*10);
/* Checks if comment */
if (block == NULL){
printf("Error: Memory could not be allocated!\n");
return -1;
}
/* comment */
array_of_client_buffers = (char*)calloc(MAX_CLIENTS, MAX_INCOMING_PACKET_SIZE*2);
/* comment */
for( i=0; i<MAX_CLIENTS; i++){
ARRAY_INDEX(array_of_client_buffers, i)[0] = '0';
ARRAY_INDEX(array_of_client_buffers, i)[MAX_INCOMING_PACKET_SIZE] = '0';
}
/* comment */
strncpy(block, array_of_client_buffers, MAX_INCOMING_PACKET_SIZE*2*10);
/* Game state shared memory*/
/* MAX clients = 10 therefore memory will be requested for five teams */
int team_count = MAX_CLIENTS/2;
int player_count = MAX_CLIENTS;
/* for now ball count will be 1 */
int ball_count = 1;
/* for now powerup count will be 1 */
int powerup_count = 1;
int total_gamestate_size = 5+ 21*team_count +1+ player_count*18 + 1 + ball_count*13 + 1 + powerup_count*17 + 1 + player_count*21;
game_state_block = attach_memory_block(FILENAME, total_gamestate_size);
team_cnt = (game_state_block + 8);
/* For now team cnt = 2*/
*team_cnt = team_count;
player_cnt = (game_state_block + 9 + 21*(*team_cnt));
/*for now player cnt is 4 */
*player_cnt = player_count;
ball_cnt = (game_state_block + 9 + 21*(*team_cnt) + 1 + 18*(*player_cnt) );
*ball_cnt = ball_count;
powerup_cnt = (game_state_block + 9 + 21*(*team_cnt) + 1 + 18*(*player_cnt) + 1 + *ball_cnt*13);
*powerup_cnt = powerup_count;
/* GAMESTATE STRUKTŪRA
*game_state_block - window wit=dth
*(game_state_block + 4) - window height
*(game_state_block + 8) - team count
*(game_state_block + 9 + 21*team_id) - komandas id
*(game_state_block + 9 + 21*team_id + 1) - komandas score
*(game_state_block + 9 + 21*team_id + 5) - savas komandas vartu lokacija X
*(game_state_block + 9 + 21*team_id + 9) - savas komandas vartu lokacija Y
*(game_state_block + 9 + 21*team_id + 13) - pretinieku komandas vartu lokacija X
*(game_state_block + 9 + 21*team_id + 13) - pretinieku komandas vartu lokacija Y
*(game_state_block + 9 + 21*team_cnt) - speletaju counts
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_id) - speletaja id
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_id + 1) - speletaja komandas id
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_id + 2) - speletaja X coordinates
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_id + 6) - speletaja Y coordinates
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_id + 10) - speletaja width
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_id + 14) - speletaja height
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt ) - bumbu count
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_id*13) - bumbas X coordinate
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_id*13 +4) - bumbas Y coordinate
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_id*13 +8) - ball radius
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_id*13 +12) - ball Type/color
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13) - powerup up count
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_id*17) - powerup type
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_id*17 + 1) - powerup X
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_id*17 + 5) - powerup Y
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_id*17 + 9) - powerup width
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_id*17 + 13) - powerup height
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_cnt*17) - player cnt
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_cnt*17 + 1 + player_id*21) - speletaja id
*(game_state_block + 9 + 21*team_cnt + 1 + 18*player_cnt + 1 + ball_cnt*13 + 1 + powerup_cnt*17 + 1 + player_id*21 + 1) - speletaja name
*/
}
/* Sends and process client's packets */
void process_client(int id,int socket){
int i;
int is_parent_proc;
char this_packet[MAX_INCOMING_PACKET_SIZE]="ABC";
char tmp[BIGGEST_BUFFER]="ABC";
int n = 0;
char in[1];
char prev_was_divider = 0;
char in_packet = 0;
char escape_mode = 0;
int last_packet_id = 0;
int mode;
/*
char in[1];
char out[100];
int k = 0;
*/
printf("Process client works");
/* Client processing is an infinite loop until the game ends */
while(1){
/* Reads the right Linux's "socket file" information */
read(socket,in,1);
/* Comment */
if (in[0] == '-' && !escape_mode){
/* If packet ends */
if (n < 3){
/* Discards silently */
} else {
/* Verifies if the buffer is a packet */
if ( is_packet(tmp, n, last_packet_id) ){
/* Comment */
mode = get_writable_packet_in_buffer(id);
/* Comment */
if (mode == 1){
/*
printf("\n Address at package receival %p ",&ARRAY_INDEX(array_of_client_buffers, 0)[MAX_INCOMING_PACKET_SIZE] );
printf("\n Character: %c \n",ARRAY_INDEX(array_of_client_buffers, 0)[MAX_INCOMING_PACKET_SIZE] );
*/
for (i = 0; i < n; i++){
/* ARRAY_INDEX(array_of_client_buffers, id)[i+1] = tmp[i]; */
ARRAY_INDEX(block, id)[i+1] = tmp[i];
}
/* just in case put 0 after packet */
/* ARRAY_INDEX(array_of_client_buffers, id)[n+1]=0; */
ARRAY_INDEX(block, id)[n+1]=0;
last_packet_id = get_4_bit_integer(tmp);
printf("Received packet of %d bytes with npk=%d\n",n, last_packet_id);
/* print_packet_bytes(&(ARRAY_INDEX(array_of_client_buffers, id)[1]), n); */
/* printf("%c\n",ARRAY_INDEX(array_of_client_buffers, id)[0] ); */
print_packet_bytes(&(ARRAY_INDEX(block, id)[1]), n);
printf("%c\n",ARRAY_INDEX(block, id)[0] );
}
/* Comment */
else if (mode == 2){
for (i = 0; i < n; i++){
/* ARRAY_INDEX(array_of_client_buffers, id)[i+MAX_INCOMING_PACKET_SIZE+1] = tmp[i]; */
ARRAY_INDEX(block, id)[i+MAX_INCOMING_PACKET_SIZE+1] = tmp[i];
}
/* just in case put 0 after packet */
/* ARRAY_INDEX(array_of_client_buffers, id)[n+MAX_INCOMING_PACKET_SIZE+1]=0; */
ARRAY_INDEX(block, id)[n+MAX_INCOMING_PACKET_SIZE+1]=0;
last_packet_id = get_4_bit_integer(tmp);
printf("Received packet of %d bytes with npk=%d\n",n, last_packet_id);
/* print_packet_bytes(&(ARRAY_INDEX(array_of_client_buffers, id)[MAX_INCOMING_PACKET_SIZE+1]), n); */
print_packet_bytes(&(ARRAY_INDEX(block, id)[MAX_INCOMING_PACKET_SIZE+1]), n);
}
/* printf("Char should be 0: %c", ARRAY_INDEX(array_of_client_buffers, id)[0]); */
/* Forks child process */
is_parent_proc = fork();
/* Child process updates the game state */
if (!is_parent_proc){
update_game_state();
exit(0);
}
/* Parent process continues executing this iteration */
}
}
n = 0;
in_packet = 0;
if (prev_was_divider){
in_packet = 1;
} else {
prev_was_divider = 1;
}
}
else {
if (in_packet){
prev_was_divider = 0;
/* un-escape if needed */
if(in[0] == '?'){
escape_mode = 1;
continue;
}
if(escape_mode){
escape_mode = 0;
if (unescape(in) == 1){
n = 0;
in_packet = 0;
continue;
}
}
tmp[n] = in[0];
n++;
}
}
/* ...
for (i = 0; i < shared_data[DEFAULT_MAX_CLIENTS + id]; i++){
sprintf(out,"%c",in[0]);
write(socket,out,1);
}*/
/* ... */
}
}
void send_player_input(int id, int client_socket){
/* piemers ka sutit package */
char* package =NULL;
/*package7 = pack7; */
package = pack3;
write(client_socket, package, 272 );
/*send(client_socket, package2, 15, 0); */
}
/* Starts network which polls new socket connections */
int start_polling(char* hostname, int port){
/* Server info */
int server_socket;
struct sockaddr_in server_address;
/* For every new connection client's info */
int client_socket;
struct sockaddr_in client_address;
int client_address_size = sizeof(client_address);
int new_client_id;
/* For every new connection process forking */
int is_parent_proc;
int is_child_proc;
/* ========== CREATES SOCKET OBJECT ========== */
/* Creates a new socket */
server_socket = socket(AF_INET, SOCK_STREAM, 0);
if (server_socket >= 0){
printf("\tServer socket created... ");
} else {
/* If creation failed, throws an error */
printf("Error: server socket creation failed!\n");
return -1;
}
/* Assigns remote socket values */
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = INADDR_ANY;
server_address.sin_port = htons(port);
/* Binds the socket to accept incoming connections */
if (bind(server_socket, (struct sockaddr*) &server_address, sizeof(server_address)) >= 0){
printf("binded... ");
} else {
/* If binding failed, throws an error */
printf("Error: server socket binding failed!\n");
return -1;
}
/* ========== STARTS SOCKET LISTENING ========== */
/* Sets the socket to listen for incoming connections */
if ((listen(server_socket, DEFAULT_MAX_CLIENTS)) >= 0){
printf("is listening!\n");
} else {
/* If listening failed, throws an error */
printf("Error: server socket setting to listening failed!\n");
return -1;
}
/* Infinitely loops server for listening and reacting to new clients */
while(1) {
/* Refreshes parameters */
client_socket = 0;
new_client_id = 0;
/* Accepts a new client connection */
if ((client_socket = accept(server_socket, (struct sockaddr*)&client_address, &client_address_size)) >= 0){
/* Assigns the new ID to the accepted client */
new_client_id = client_count;
client_count += 1;
/* Forks child process */
is_parent_proc = fork();
if (!is_parent_proc){
/* Child closes the client's socket */
close(client_socket);
} else {
/* Parent closes the server socket */
close(server_socket);
/* Forks grandchild process */
is_child_proc = fork();
if (!is_child_proc){
/* Grandchild processes client */
send_player_input(new_client_id, client_socket);
process_client(new_client_id,client_socket);
exit(0);
} else {
/* Child waits to die due to DOUBLE FORKING */
wait(NULL);
printf("Succesfully orphaned client %d\n", new_client_id);
exit(0);
}
/* Child process calls func process_client() */
}
} else {
/* If error during accepting new client connection occured, throws an error and continues */
printf("Error: accepting client connection failed! ERRNO=%d\n",errno);
continue;
}
}
}
int main(int argc, char** argv){
int i;
/* Assigns default values to server connection info */
char* server_hostname = DEFAULT_HOSTNAME;
int server_port = DEFAULT_PORT;
/* Process forking status */
int is_parent_proc;
/* ========== READS SERVER'S CONNECTION INFO ========== */
printf("\tReading connection parameters... ");
server_hostname = read_param_value(argc, argv, 'h');
server_port = atoi(read_param_value(argc, argv, 'p'));
printf("hostname=\"%s\", port=%d!\n", server_hostname, server_port);
/* ========== ALLOCATES MEMORY FOR SERVER'S NEEDS ========== */
int requested_mem_size = DEFAULT_SHARED_MEMORY_SIZE;
/* ja vajadzēs vairāk atmiņu packetos vai gamestate tad varēs palielināt memory size no 1024 */
int* memory_block = malloc(requested_mem_size * sizeof(int));
/* pagaidam game state būs 512 baitus liels memory */
int* game_state_partition = (int*)(memory_block +sizeof(int)*requested_mem_size/2);
/*
memory block struktūra:
first_client input(128 baiti) ->
second_client input(128 baiti) ->
third_client input(128 baiti) ->
fourth_client input(128 baiti) ->
gamestate_client input(512 baiti)
*/
/* pagaidam katram clientam būs 128 baiti */
int* first_client_input = (int*)memory_block;
int* second_client_input = (int*)(first_client_input + sizeof(int)*requested_mem_size/8);
int* third_client_input = (int*)(second_client_input + sizeof(int)*requested_mem_size/8);
int* fourth_client_input = (int*)(third_client_input + sizeof(int)*requested_mem_size/8);
/*
Katram clientam inputam pirmais baits noradis 0 vai 1:
0 nozime ka packetā var rakstīt,
1 nozīmēs ka packetā nevar rakstīt, jo to sākumā ir jānolasa gameupdeitotajam
*/
*first_client_input = 0;
*second_client_input = 0;
*third_client_input = 0;
*fourth_client_input = 0;
/*
talak lai atrastu packeta info vajadzes:
first_client_packet = (*int)( first_client +sizeof(int) )
vai ari vares izmantot client id un tad vares accessot katru:
client_packet = (*int)(memory_block + sizeof(int) * requested_mem_size/8 * id)
*/
get_shared_memory();
/* Testing printable packages
char* package2 = createPackage2(4, 0);
char* package4 = createPackage4(1);
/* ========== RUNS THE SERVER ========== */
printf("\tRunning space-pong server...\n");
/* Forks child process */
is_parent_proc = fork();
if (!is_parent_proc){
/* Parent process starts the game */
launch_game(game_state_partition);
} else {
/* Child process calls the start server polling function */
start_polling(server_hostname, server_port);
}
return 0;
}
/* ------------------------------------------------------------------ */
int get_writeable_packet_in_buffer(int id){
char available = ARRAY_INDEX(block, id)[0];
char available2 = ARRAY_INDEX(block, id)[MAX_INCOMING_PACKET_SIZE];
if(available == '0'){
ARRAY_INDEX(block, id)[0] = '1';
return 1;
}else if(available2 == '0'){
ARRAY_INDEX(block, id)[MAX_INCOMING_PACKET_SIZE] = '1';
return 2;
}
return -1;
}
/* ---------PACKET CREATING---------- */
char* createPackage2(char status, int package_number){
unsigned int number2 = htonl(package_number);
char packageNumberString[4];
unsigned char checksum = 0;
memcpy(packageNumberString, &number2, 4);
int pos = 0;
/*char pack1[34] = {'-','-', 0,0,0,0, 1, 0,0,0,20, 'n','i','c','k',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 26, '-','-'}; */
/* package 1 */
char* package =NULL;
package = pack2;
int i = 2;
int posNum = i+4;
/* Adding package number */
for(i = 2; i<posNum; i++){
package[i] = packageNumberString[i-2];
}
package[11] = status;
/* Calculating and adding checksum */
checksum = (unsigned char) calculate_checksum(package+2, 10);
package[12] = checksum;
return package;
}
char* createPackage3(char* data_segment, int package_number){
unsigned int number2 = htonl(package_number);
char packageNumberString[4];
char packageSizeString[4];
char packageIdString;
unsigned char checksum = 0;
int pack_id = 3;
memcpy(packageNumberString, &number2, 4);
int pos = 0;
int size;
/*char pack1[34] = {'-','-', 0,0,0,0, 1, 0,0,0,20, 'n','i','c','k',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 26, '-','-'}; */
/* package 1 */
char* package =NULL;
package = pack3;
int i = 2;
int posNum = i+4;
/* Adding package number */
for(i = 2; i<posNum; i++){
package[i] = packageNumberString[i-2];
}
/* Adding message to package */
i= 13;
while(data_segment[i-13] != '\0'){
package[i] = data_segment[i-13];
i++;
}
/* Adding 0 in the remaining data segment */
for(i; i<270; i++){
package[i] = 0;
}
/* Calculating and adding checksum */
package[i] = 0;
checksum = (unsigned char) calculate_checksum(package+2, 266);
package[i] = checksum;
return package;
}
char* createPackage4( int package_number){
/* šobrīd var izveidot packetu tikai ar 4iem playeru vārdiem */
unsigned int number2 = htonl(package_number);
char packageNumberString[4];
unsigned char checksum = 0;
memcpy(packageNumberString, &number2, 4);
int pos = 0;
int size;
/* {'-','-', 0,0,0,2, 4, 0,0,0,0, /* player count Id Player name
1, 0, 'N','a','me','e','1',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1, 'N','a','me','e','2',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
2, 'N','a','me','e','1',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
3, 'N','a','me','e','2',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/* CS? DIV
1, '-','-'};*/
char* package =NULL;
package = pack4;
int i = 2;
int posNum = i+4;
/* Adding package number */
for(i = 2; i<posNum; i++){
package[i] = packageNumberString[i-2];
}
if(*player_cnt > 4){
package[11] = 4;
}else{
package[11] = *player_cnt;
}
/* Vēl jāpievieno spēlētāju vārdi un id
i =
for()
/* Adding message to package
i= 13;
while(data_segment[i-13] != '\0'){
package[i] = data_segment[i-13];
i++;
}
/* Adding 0 in the remaining data segment
for(i; i<31; i++){
package[i] = 0;
}
/* Calculating and adding checksum */
checksum = (unsigned char) calculate_checksum(package+2, 93);
package[97] = checksum;
return package;
}