該博文參考了linux c socket 程式設計之udp一文，在這裡表示感謝！
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/*
* file: udp_sender.c
* author: henry
* * created on 2023年5月29日17:08:13
* * 主要實現：傳送20個文字訊息，然後再傳送乙個終止訊息
*/#include
#include
#include
#include
#include
#include
#include
intpower
(int base,
int exp)
;int
str_to_num
(const
char
*s);
intmain
(int argc,
char
** ar**)
int socket_descriptor;
//套介面描述字
int iter=0;
char buf[80]
;struct sockaddr_in address;
//處理網路通訊的位址
bzero
(&address,
sizeof
(address));
address.sin_family=af_inet;
"192.168.2.1");//這裡不一樣
address.sin_addr.s_addr=
inet_addr
(ar**[1]
);//這裡不一樣
address.sin_port=
htons
(str_to_num
(ar**[2]
));//建立乙個 udp socket
socket_descriptor=
socket
(af_inet,sock_dgram,0)
;//ipv4 sock_dgram 資料報套接字（udp協議）
for(iter=
0;iter<=
20;iter++
)sprintf
(buf,
"stop\n");
sendto
(socket_descriptor,buf,
sizeof
(buf),0
,(struct sockaddr *
)&address,
sizeof
(address));
//傳送stop 命令
close
(socket_descriptor)
;printf
("messages sent,terminating\n");
exit(0
);return
(exit_success);}
intstr_to_num
(const
char
* s)
return n;
}int
power
(int base,
int exp)
/*
* file: udp_receiver.c
* author: henry
* * created on 2023年5月29日17:09:11
* * 主要實現：傳送20個文字訊息，然後再傳送乙個終止訊息
*/#include
#include
#include
#include
#include
#include
#include
intpower
(int base,
int exp)
;int
str_to_num
(const
char
*s);
intmain
(int argc,
char
** ar**)
int sin_len;
char message[
256]
;int socket_descriptor;
struct sockaddr_in sin;
printf
("waiting for data from sender \n");
bzero
(&sin,
sizeof
(sin));
sin.sin_family=af_inet;
sin.sin_addr.s_addr=
htonl
(inaddr_any)
; sin.sin_port=
htons
(str_to_num
(ar**[1]
)); sin_len=
sizeof
(sin);
socket_descriptor=
socket
(af_inet,sock_dgram,0)
;bind
(socket_descriptor,
(struct sockaddr *
)&sin,
sizeof
(sin));
while(1
)}close
(socket_descriptor)
;exit(0
);return
(exit_success);}
intstr_to_num
(const
char
* s)
return n;
}int
power
(int base,
int exp)
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