udpserv.c

来自「语音编解码的解码源代码」· C语言 代码 · 共 56 行

            #include <sys/types.h>
            #include <sys/socket.h>
            #include <string.h>
            #include <netinet/in.h>
            #include <stdio.h>
            #include <stdlib.h>

            #define MAXLINE 80
            #define SERV_PORT 8888
            
            void do_echo(int sockfd, struct sockaddr *pcliaddr, socklen_t clilen)
            {
            int n;
            socklen_t len;
            char mesg[80];
						int i=0;
						
            for(;;)
            {
         	   len = clilen;
       	     /* waiting for receive data */
       	     n = recvfrom(sockfd, mesg, 80, 0, pcliaddr, &len);
       	     for(i=0;i<n;i++)
       	     {
       	     		printf("*******%d********",mesg[i]);
       	    }
       	     /* sent data back to client */
       	     sendto(sockfd, mesg, n, 0, pcliaddr, len);
            }
            }

            int main(void)
            {
            int sockfd;
            struct sockaddr_in servaddr, cliaddr;

            sockfd = socket(AF_INET, SOCK_DGRAM, 0); /* create a socket */

            /* init servaddr */
            bzero(&servaddr, sizeof(servaddr));
            servaddr.sin_family = AF_INET;
            servaddr.sin_addr.s_addr = htonl(INADDR_ANY);  //#define	INADDR_ANY		((unsigned long int) 0x00000000)
            servaddr.sin_port = htons(8888);

            /* bind address and port to socket */
            if(bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) == -1)
            {
            perror("bind error");
            exit(1);
            }

            do_echo(sockfd, (struct sockaddr *)&cliaddr, sizeof(cliaddr));

            return 0;
            }