UDP网络编程
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了UDP网络编程相关的知识，希望对你有一定的参考价值。
发送端程序：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#define _WINSOCK_DEPRECATED_NO_WARNINGS //为了取消inet_addr警告#include <WinSock2.h>#include <iostream>using namespace std;#pragma comment(lib,"ws2_32.lib")#define IP "127.0.0.1"//自身的IP地址#define PORT 8881 //自身的端口号int main(){ WSADATA wd; WSAStartup(0x0202, &wd);//2.2版本，启动网络socket //创建soket SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0); if (INVALID_SOCKET == sock) { cout << "创建socket套接字（句柄）时出错：" << WSAGetLastError() << endl; return -1; } //创建头 sockaddr_in sa; //16字节也可以用sockaddr，但是需要设置太多的数据 sa.sin_family = 2;// family AF_INET sa.sin_port = htons(PORT);//将存储字节序转为网络字节序，高低字节变换，port = 0代表自动配送端口 //sa.sin_addr.S_un.S_addr = 0;//绑定本机所有IP， sa.sin_addr.S_un.S_addr = inet_addr(IP); //绑定 int n = bind(sock, (sockaddr*)&sa, sizeof(sa));//需要强制转换为sockaddr*格式 if (SOCKET_ERROR == n) { cout << "绑定套接字时出错：" << WSAGetLastError() << endl; return -1; } sockaddr_in to; to.sin_family = 2; to.sin_port = htons(8883);//将存储字节序转为网络字节序 char s[256]; to.sin_addr.S_un.S_addr = inet_addr(IP); while (true) { //sa.sin_addr.S_un.S_addr = 0;//绑定本机所有IP， gets_s(s); sendto(sock, s, strlen(s), 0, (sockaddr*)&to, sizeof(to)); }} |
接收端程序：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#define _WINSOCK_DEPRECATED_NO_WARNINGS//inet_addr#include <WinSock2.h>#include <iostream>using namespace std;#pragma comment(lib,"ws2_32.lib")#define IP "192.168.1.107"#define PORT 8883int main(){ WSADATA wd; WSAStartup(0x0202, &wd);//2.2版本 //创建soket SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0); if (INVALID_SOCKET == sock) { cout << "创建socket套接字（句柄）时出错：" << WSAGetLastError() <<endl; return -1; } sockaddr_in sa; sa.sin_family = 2; sa.sin_port = htons(PORT);//将存储字节序转为网络字节序 //sa.sin_addr.S_un.S_addr = 0;//绑定本机所有IP， sa.sin_addr.S_un.S_addr = inet_addr(IP); int n = bind(sock, (sockaddr*)&sa, sizeof(sa)); if (SOCKET_ERROR == n) { cout << "绑定套接字时出错：" << WSAGetLastError() << endl; return -1; } char s[4096] = {0}; while (true) { n = recv(sock, s, sizeof(s), 0); cout << "收到数据："; if (SOCKET_ERROR == n) { cout << "recv接收数据失败：" << WSAGetLastError() << endl; return -1; } s[n] = 0; cout << s << endl; }} |
以上是关于UDP网络编程的主要内容，如果未能解决你的问题，请参考以下文章