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  1. #include <stdio.h>
  2. #include <sys/socket.h>
  3. #include <stdlib.h>
  4. #include <string.h>  //strlen
  5. #include <arpa/inet.h>  //inet_addr
  6. #include <unistd.h>  //write
  7. #include <pthread.h>
  8.  
  9. #define SERVER_IP "127.0.0.1"
  10. #define SERVER_PORT 8888
  11.  
  12. void *connection_handler(void *);
  13.  
  14. int main(int argc , char *argv[])
  15. {
  16.     int socket_desc, new_socket, c, *new_sock;
  17.     struct sockaddr_in server, client;
  18.     pthread_t sniffer_thread;
  19.  
  20.     //Create socket
  21.     socket_desc = socket(AF_INET, SOCK_STREAM, 0);
  22.  
  23.     //Sockaddr struct
  24.     server.sin_family = AF_INET;
  25.     server.sin_addr.s_addr = INADDR_ANY;
  26.     server.sin_port = htons (SERVER_PORT);
  27.  
  28.     //bind socket to a port
  29.     bind(socket_desc, (struct sockaddr *)&server, sizeof(server));
  30.     //puts("bind done");
  31.  
  32.     //listen, max 20 connections
  33.     listen(socket_desc,20);
  34.  
  35.     //Accept and incoming connection
  36.     puts("waiting for incoming connection...");
  37.     c = sizeof(struct sockaddr_in);
  38.     while(new_socket = accept(socket_desc, (struct sockaddr *)&client, (socklen_t*)&c))
  39.     //while(1)
  40.     {
  41.         new_sock = malloc(1);
  42.         *new_sock = new_socket;
  43.         pthread_create(&sniffer_thread, NULL, connection_handler, (void*)new_sock);
  44.     }
  45.     //close(socket_desc);
  46.     return 0;
  47. }
  48.  
  49. void *connection_handler(void *socket_desc)
  50. {
  51.     int sock = *(int*)socket_desc;
  52.     int sendback_nu;
  53.     char *message, client_message[3];
  54.  
  55.     read(sock, client_message, strlen(client_message));
  56.     puts(client_message);
  57.     printf("client_message = %s \r\n",client_message);
  58.     int temp_nu = atoi(client_message);
  59.     char text[5];
  60.  
  61.     puts("this is a thread message");
  62.     sendback_nu = temp_nu * 100 + 5;
  63.     sprintf(text,"%d",sendback_nu);
  64.     message = text;
  65.  
  66.     write(sock, message, strlen(message));
  67.     puts("send back");
  68.     puts(message);
  69.     free(socket_desc);
  70.     return 0;
  71. }
Time limit exceeded #stdin #stdout 5s 9432KB
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https://ideone.com/rTrAQO
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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