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os_project.c
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os_project.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
// #include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h> //inet_addr
#include <time.h>
#include <sys/stat.h>
#include <fcntl.h>
#define FIRST 6006
#define SEC 7006
void choosing_winner(int random_number1 , int random_number2 , int random_number3 , int n){
int random_number[3] = {random_number1 , random_number2 , random_number3};
int i = 0 , greatest = 0 , temp = 0 , winner = 0;
for (i = 0 ; i < 3 ; i++) {
if (random_number[i] > temp)
temp = random_number[i];
winner = i;
}
greatest = temp;
printf("THE winner is who owned this number: %d\n",greatest);
// write(1,&greatest,sizeof(int));
// char greatestt[100];
// char winnerr[100];
// char nn[100];
// itoa(winner,winnerr,10);
// itoa(greatest,greatestt,10);
// itoa(n,nn,10);
// int file;
// file = open(nn , O_WRONLY | O_CREAT | O_APPEND , 0644);
// write(file,&greatestt,sizeof(int));
// write(file,&winnerr,sizeof(int));
}
int random_generate(int randy){
int x = randy;
int a = randy%30;
int b = randy%55;
int m = randy%85;
int tzero = time(0);
while(1) {
x = (a * x + b) % m;
int ezero = time(0);
if(ezero - tzero > 1)
break;
}
return x;
}
int fork_func(){
int fd[2], nbytes;
pid_t childpid;
int readbuffer[80];
pipe(fd);
if((childpid = fork()) == -1) {
perror("fork");
exit(1);
}
if(childpid == 0) {
/* Child process closes up input side of pipe */
close(fd[0]);
int result = random_generate((int)time(0));
/* Send "string" through the output side of pipe */
write(fd[1], &result, sizeof(result));
exit(0);
}
else {
/* Parent process closes up output side of pipe */
close(fd[1]);
/* Read in a string from the pipe */
nbytes = read(fd[0], readbuffer, sizeof(readbuffer));
printf("Received number: %d \n", readbuffer);
return readbuffer;
}
}
int main(int argc , char *argv[])
{
int sock , client_sock , client_sock2 , read_size ;
struct sockaddr_in server ,client;
socklen_t c;
//Create socket
sock = socket(AF_INET , SOCK_STREAM , 0);
// if (sock == -1)
// printf("Could not create socket");
bzero(&client , sizeof(client));
// puts("Socket created");
server.sin_addr.s_addr = INADDR_ANY;
server.sin_family = AF_INET;
server.sin_port = htons( FIRST );
int first_bind , second_bind , third_bind;
first_bind = bind(sock,(struct sockaddr *)&server , sizeof(server));
// first_bind = connect(sock , (struct sockaddr *)&server , sizeof(server));
//Bind
// if(first_bind < 0){
// printf("khaaaar\n");
// exit(-1);
// }
printf("%d\n" , first_bind);
if( first_bind >= 0) //in baraye avalin nafar mishe
{
struct sockaddr_in cli_adr , cli_adr2;
printf("first person is connected. welcome \n");
//Listen
listen(sock , 3);
int random_number1_1;
int random_number1_2;
int random_number1_3;
//Accept and incoming connection
puts("Waiting for incoming connections...\n");
//c = sizeof(server);
socklen_t size1 = sizeof(cli_adr);
socklen_t size2 = sizeof(cli_adr2);
//accept connection from an incoming client
bzero(&cli_adr, sizeof(cli_adr));
printf("before accept no 1\n");
client_sock = accept(sock, (struct sockaddr *)&cli_adr,&size1);
printf("some one connected to me NO1\n");
client_sock2 = accept(sock, (struct sockaddr *)&cli_adr2, &size2);
printf("some one connnected to me NO2\n");
//if (client_sock > 0 && client_sock2 > 0)
int i=0;
for(i= 0 ; i < 10 ; i++){
printf("ROUND NO %d\n",i);
random_number1_1 = fork_func();
// puts("Connection accepted");
printf("kheili\n");
write(client_sock , &random_number1_1 , sizeof(int));
printf("kheili\n");
write(client_sock2 , &random_number1_1 , sizeof(int));
printf("kheili\n");
read(client_sock , &random_number1_2 , sizeof(int));
printf("kheili\n");
read(client_sock2 , &random_number1_3 , sizeof(int));
printf("kheili\n");
printf("PERSON ONE \nnumber from connection one is : %d\n", random_number1_2);
printf("PERSON ONE \nnumber from connection one is : %d\n", random_number1_3);
// printf()
choosing_winner(random_number1_1 , random_number1_2 , random_number1_3 , 1);
}
}
else {
int sock1;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_family = AF_INET;
server.sin_port = htons( SEC );
// int second_bind;
second_bind = bind(sock,(struct sockaddr *)&server , sizeof(server));
if( second_bind >= 0) //in baraye nafare dovom!
{
printf("second person is connected. welcome \n");
//Listen
listen(sock , 3);
int random_number2_1;
int random_number2_2;
int random_number2_3;
//Accept and incoming connection
puts("Waiting for incoming connections...\n");
//c = sizeof(struct sockaddr_in);
//make a connection with port one!
server.sin_addr.s_addr = INADDR_ANY;
server.sin_family = AF_INET;
server.sin_port = htons( FIRST );
sock1 = socket(AF_INET, SOCK_STREAM,0);
printf("salllllllllam %d\n",connect(sock1 , (struct sockaddr *)&server , sizeof(server)));
socklen_t clilen;
clilen = sizeof(client);
//accept connection from an incoming client
client_sock = accept(sock, (struct sockaddr *)&client, &clilen);
printf("some one connected to me !\n");
printf("%d\n",client_sock);
// client_sock2 = accept(sock, (struct sockaddr *)&server, (socklen_t*)&c);
//if (client_sock > 0)
int i=0;
for(i= 0 ; i < 10 ; i++){
printf("ROUND NO %d\n",i);
random_number2_2 = fork_func();
write(client_sock , &random_number2_2 , sizeof(int));
write(sock1 , &random_number2_2 , sizeof(int));
read(client_sock , &random_number2_1 , sizeof(int));
read(sock1 , &random_number2_3 , sizeof(int));
printf("P2\nnumber from connection one is : %d\n", random_number2_1);
printf("P2\nnumber from connection one is : %d\n", random_number2_3);
// puts("Connection accepted");
choosing_winner(random_number2_1 , random_number2_2 , random_number2_3 , 2);
}
}
else {
printf("third person is connected. welcome\n");
int sock1 = socket(AF_INET, SOCK_STREAM, 0);
int sock2 = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in server1;
struct sockaddr_in server2;
// server.sin_addr.s_addr = INADDR_ANY;
// server.sin_family = AF_INET;
// server.sin_port = htons( 9212 );
// int third_bind;
//third_bind = bind(sock,(struct sockaddr *)&server , sizeof(server));
//if( third_bind >= 0) {
int random_number3_1;
int random_number3_2;
int random_number3_3;
//connecting to others
//connection with port one!
server1.sin_addr.s_addr = INADDR_ANY;
server1.sin_family = AF_INET;
server1.sin_port = htons( FIRST );
printf("RRRRRR%d\n",connect(sock1 , (struct sockaddr *)&server1 , sizeof(server1)));
//connection with port two!
server2.sin_addr.s_addr = INADDR_ANY;
server2.sin_family = AF_INET;
server2.sin_port = htons( SEC );
printf("RRRRRR%d\n",connect(sock2 , (struct sockaddr *)&server2 , sizeof(server2)));
//and send start button
int i=0;
for(i= 0 ; i < 10 ; i++){
printf("ROUND NO %d\n",i);
random_number3_3 = fork_func();
printf("WWWWWWw%d" , write(sock1, &random_number3_3, sizeof(int)));
write(sock2, &random_number3_3, sizeof(int));
read(sock1, &random_number3_1, sizeof(int));
read(sock2,&random_number3_2, sizeof(int));
printf("P3\nnumber from connection one is : %d\n", random_number3_1);
printf("P3\nnumber from connection one is : %d\n", random_number3_2);
choosing_winner(random_number3_1 , random_number3_2 , random_number3_3 , 3);
}
}
}
close(sock);
close(first_bind);
close(second_bind);
close(third_bind);
close(client_sock);
close(client_sock2);
}