testrecv_udp.c

来自「C语言编写的socket服务端测试程序」· C语言 代码 · 共 57 行

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <time.h>
#include <signal.h>
#include <string.h>

int main(argc,argv)
int argc;
char **argv;
{
	int iRecvSock,iSendSock;
	struct sockaddr_in strUdp,strRecv;
	char strRRF[10240];
	int iAddrLength;

	if(argc!=2) {
		fprintf(stderr,"Usage : testrecv <port>\n");
		exit(1);
	}

	iAddrLength=sizeof(struct sockaddr_in);
	memset(&strUdp,'\0',sizeof(struct sockaddr_in));
	strUdp.sin_family=PF_INET;
	strUdp.sin_port=htons(atoi(argv[1]));
	strUdp.sin_addr.s_addr=INADDR_ANY;

	if((iRecvSock=socket(PF_INET,SOCK_DGRAM,0))==-1){
		printf("Create socket failed\n");
		exit(0);
	}
	if(bind(iRecvSock,(struct sockaddr *)&strUdp,iAddrLength)==-1){
		printf("bind error!\n");
		exit(0);
	}
	printf("bind ok\n");
	while(1){
		if(recvfrom(iRecvSock,&strRRF,10240,0,(struct sockaddr *)&strRecv,&iAddrLength)>0 ){
			printf("3333333333\n");
			printf("recvfrom port %d\n",strRecv.sin_port);
			printf("recvmsg:%s\n",strRRF);			
		}else{
			printf("recv error\n");
			close(iRecvSock);
			exit(0);
		}
	}
}