udp_server

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udp_server代码如下：

#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <stdio.h>#include <unistd.h>#include <errno.h>#include <string.h>#include <stdlib.h>int main(){        int sock;        int addr_len, bytes_read;        char recv_data[1024];        struct sockaddr_in server_addr , client_addr;        if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {            perror("Socket");            exit(1);        }        server_addr.sin_family = AF_INET;        server_addr.sin_port = htons(5000);        server_addr.sin_addr.s_addr = INADDR_ANY;        bzero(&(server_addr.sin_zero),8);        if (bind(sock,(struct sockaddr *)&server_addr,            sizeof(struct sockaddr)) == -1)        {            perror("Bind");            exit(1);        }        addr_len = sizeof(struct sockaddr); printf("/nUDPServer Waiting for client on port 5000");        fflush(stdout); while (1) {          bytes_read = recvfrom(sock,recv_data,1024,0,                     (struct sockaddr *)&client_addr, &addr_len);   recv_data[bytes_read] = '/0';          printf("/n(%s , %d) said : ",inet_ntoa(client_addr.sin_addr),                                       ntohs(client_addr.sin_port));          printf("%s", recv_data);   fflush(stdout);        }        return 0;}

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