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8315 superturbo 1
#include 
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#include 
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#include 
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#include 
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const char msg1[]="Hello!";
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char msg2='\0';
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int main()
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{
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    struct sockaddr addr={AF_INET4, PORT(23) , 0, 0};
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    int sk1=socket(AF_INET4, SOCK_STREAM, IPPROTO_TCP);
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    printf("Open socket: %d. Error: %d\n",sk1, errno);
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    bind(sk1, &addr,sizeof(addr));
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    printf("Socket binding. Error: %d\n", errno);
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    listen(sk1, 1);
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    printf("Listening to a socket. Error: %d\n", errno);
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    int sk2 = accept(sk1, &addr, sizeof(addr));
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    printf("Accept done. Error: %d\n", errno);
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    send(sk2, msg1, strlen(msg1),MSG_NOFLAG);
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    printf("Send message: '%s'  Error: %d\n", msg1, errno);
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    puts("Received data:");
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    while(msg2!='!')
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    {
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        recv(sk2, &msg2, 1, MSG_NOFLAG);
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        printf("%c",msg2);
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    }
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    close(sk1);
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    close(sk2);
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    puts("\nGood bye!");
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    exit(0);
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}