#include?
#include?
#include
#include?
#include?
#include?
#include?
#include?


int?main（int?argc?char?**argv）
{
????char?buff[512]?=?“--------->?The?message?is?from?clinet!?<----------“;

????if?（argc?!=?3）
????{
????????printf（“Usage:?%s?server-ip?port“?argv[0]）;
????????exit（1）;
????}
????printf（“This?is?a?UDP?client\n“）;
????struct?sockaddr_in?addr;
????int?sock;

????if?（?（sock=socket（AF_INET?SOCK_DGRAM?0））?<0）
????{
????????perror（“socket“）;
????????exit（1）;
????}
????addr.sin_family?=?AF_INET;
????addr.sin_port?=?htons（atoi（argv[2]））;
????addr.sin_addr.s_addr?=?inet_addr（argv[1]）;
????if?（addr.sin_addr.s_addr?==?INADDR_NONE）
????{
????????printf（“Incorrect?ip?address!“）;
????????close（sock）;
????????exit（1）;
????}

????int?len?=?sizeof（addr）;
????while?（1）
????{
??????//??gets（buff）;
????????int?n;
????????if（?sendto（sock?buff?strlen（buff）?0?（struct?sockaddr?*）&addr?sizeof（addr））?????????????perror（“sendto“）;
????????????close（sock）;
????????????break;
????????}else{
			printf（“clinet?send?success!\n“）;
		}


????????n?=?recvfrom（sock?buff?512?0?（struct?sockaddr?*）&addr?&len）;
????????if?（n>0）
????????{
????????????buff[n]?=?0;
????????????printf（“received?%d?bytes:“n）;
????????????puts（buff）;
????????}
????????else?if?（n==0）
????????{
????????????printf（“server?closed\n“）;
????????????close（sock）;
????????????break;
????????}
????????else?if?（n?==?-1）
????????{
????????????perror（“recvfrom“）;
????????????close（sock）;
????????????break;
????????}
????}
????
????return?0;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-11-22?16:39??udp網絡通信\
?????目錄???????????0??2013-11-22?16:39??udp網絡通信\單播\
?????文件????????1693??2013-11-21?16:10??udp網絡通信\單播\udp_clinet.c
?????文件????????1537??2013-11-21?15:42??udp網絡通信\單播\udp_server.c
?????文件??????181250??2013-11-22?16:02??udp網絡通信\單播\udp單播.png
?????目錄???????????0??2013-11-22?16:39??udp網絡通信\廣播\
?????文件?????????361??2012-09-14?15:38??udp網絡通信\廣播\Makefile
?????文件????????3680??2012-09-14?18:05??udp網絡通信\廣播\bcast_client.c
?????文件????????2552??2012-09-14?17:41??udp網絡通信\廣播\bcast_server.c
?????文件???????91815??2013-11-22?16:32??udp網絡通信\廣播\udp廣播.png
?????目錄???????????0??2013-11-22?16:39??udp網絡通信\組播\
?????文件????????2571??2013-11-22?17:55??udp網絡通信\組播\multi_udp_clinet.c
?????文件????????2875??2013-11-21?10:13??udp網絡通信\組播\multi_udp_server.c
?????文件???????76608??2013-11-22?16:29??udp網絡通信\組播\udp組播.png