头文件：
1 #pragma once
2
3 #include<stdio.h>
4 #include<unistd.h>
5 #include<string.h>
6 #include<stdlib.h>
7 #include<netinet/in.h>
8
9 #define SERVER_IP "192.168.0.22"
10 #define SERVER_PORT 10000
11
12 #define MAX_BUFFER_SIZE 255
13 #define LISTEN_QUEUE_SIZE 5
14 void Perror(char *str)
15 {
16 perror(str);
17 exit(1);
18 }
客户端代码：
1 #include"utili.h"
2
3 int main()
4 {
5 int sockCli = socket(AF_INET, SOCK_DGRAM, 0);
6 if(sockCli == -1)
7 Perror("socket");
8
9 struct sockaddr_in addrSer,addrCli;
10 addrSer.sin_family = AF_INET;
11 addrSer.sin_port = htons(SERVER_PORT);
12 addrSer.sin_addr.s_addr = inet_addr(SERVER_IP);
13
14 socklen_t len = sizeof(struct sockaddr);
15 char sendbuf[MAX_BUFFER_SIZE];
16 char recvbuf[MAX_BUFFER_SIZE];
17
18 while(1)
19 {
20 printf("Cli:>");
21 scanf("%s",sendbuf);
22 sendto(sockCli, sendbuf, strlen(sendbuf)+1, 0, (struct sockaddr*)&addrSer, len);
23
24 recvfrom(sockCli, recvbuf, MAX_BUFFER_SIZE, 0, (struct sockaddr*)&addrSer, &len);
25 printf("Ser:>%s\n",recvbuf);
26
27 }
28
29 close(sockCli);
30 return 0;
31 }
服务端代码：
1 #include"utili.h"
2
3 int main()
4 {
5 int sockSer = socket(AF_INET, SOCK_DGRAM, 0);
6 if(sockSer == -1)
7 Perror("socket");
8
9 struct sockaddr_in addrSer,addrCli;
10 addrSer.sin_family = AF_INET;
11 addrSer.sin_port = htons(SERVER_PORT);
12 addrSer.sin_addr.s_addr = inet_addr(SERVER_IP);
13
14 socklen_t len = sizeof(struct sockaddr);
15 int res = bind(sockSer, (struct sockaddr*)&addrSer, len);
16 if(res == -1)
17 Perror("bind");
18
19 char sendbuf[MAX_BUFFER_SIZE];
20 char recvbuf[MAX_BUFFER_SIZE];
21
22 while(1)
23 {
24 recvfrom(sockSer, recvbuf, MAX_BUFFER_SIZE, 0, (struct sockaddr*)&addrCli, &len);
25 printf("Cli:>%s\n",recvbuf);
26
27 printf("Ser:>");
28 scanf("%s",sendbuf);
29 sendto(sockSer, sendbuf, strlen(sendbuf)+1, 0, (struct sockaddr*)&addrCli, len);
30 }
31
32 close(sockSer);
33 return 0;
34 }
转载于:https://www.cnblogs.com/xumiao1314/p/7365083.html
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