#include <sys/socket.h> #include <sys/stat.h> #include <arpa/inet.h> #include <stdio.h> #include <string.h> #define MAXBUF 256 int main(int argc, char **argv) { int server_sockfd, client_sockfd; int client_len, n; char buf[MAXBUF]; struct sockaddr_in clientaddr, serveraddr; client_len = sizeof(clientaddr); if ((server_sockfd = socket(:2)(AF_INET, SOCK_STREAM, 0)) < 0) { perror("socket error : "); exit(0); } bzero(&serveraddr, sizeof(serveraddr)); serveraddr.sin_family = AF_INET; serveraddr.sin_addr.s_addr = htonl(INADDR_ANY); serveraddr.sin_port = htons(:3)( atoi(:3)(argv[1]) ); bind(:2)(server_sockfd, (struct sockaddr *)&serveraddr, sizeof(serveraddr)); listen(:2)(server_sockfd, 5); while(1) { memset(buf, 0x00, MAXBUF); client_sockfd = accept(:2)(server_sockfd, (struct sockaddr *)&clientaddr, &client_len); if ((n = read(client_sockfd, buf, MAXBUF)) <= 0) { close(client_sockfd); continue; } if ( write(client_sockfd, buf, MAXBUF) <=0) { perror("write error : "); close(client_sockfd); } close(client_sockfd); } }
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