#include #include #include #include #include #include #include #include #include int main(int argc, char **argv) { char buffer[1024]; char *clientIP; int connection, port = 7001; int sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); socklen_t clientlen; sockaddr_in serverAddr, clientAddr; // Server serverAddr.sin_family = AF_INET; serverAddr.sin_port = htons(port); serverAddr.sin_addr.s_addr = INADDR_ANY; clientlen = sizeof(clientAddr); if(-1 == bind(sock,(struct sockaddr *)&serverAddr, sizeof(serverAddr))) { perror("error bind failed"); close(sock); exit(EXIT_FAILURE); } if(-1 == listen(sock, 10)) { perror("listen failed"); close(sock); exit(EXIT_FAILURE); } printf("Listening on port %i...\n", port); for(;;) { connection = accept(sock, (struct sockaddr *)&clientAddr, &clientlen); if(0 > connection) { perror("accept failed"); close(sock); exit(EXIT_FAILURE); } clientIP = inet_ntoa(clientAddr.sin_addr); printf("Connection established!\n"); sprintf(buffer, "HTTP/1.1 200 OK\r\n\ Content-Type: text/html; charset=utf8\r\n\ \r\n\ Algorithmen und Datenstrukturen\r\n\

Algorithmen und Datenstrukturen

\r\n\

HTTP

\r\n\

Your IP is %s

\r\n\r\n", clientIP); send(connection, buffer, strlen(buffer), 0); shutdown(connection, SHUT_RDWR); close(connection); } close(sock); return(0); }