UDP服务器/客户端代码示例

 1 #include <errno.h>
 2 #include <string.h>
 3 #include <stdlib.h>
 4 #include <sys/types.h>
 5 #include <sys/socket.h>
 6 #include <netinet/in.h>
 7 #include <arpa/inet.h>
 8 #include <iostream>
 9 
10 using namespace std;
11 
12 int main(int argc, char *argv[])
13 {
14     if (argc != 3)
15     {
16         cout << "usage: " << argv[0] << " ip port" << endl;
17         return -1;
18     }
19 
20     char *szIp = argv[1];
21     in_addr_t iIp = inet_addr(szIp);
22     if (iIp == INADDR_NONE)
23     {
24         cerr << "fail to parse ip: " << szIp << endl;
25         return -1;
26     }
27     char *pEnd = NULL;
28     uint16_t usPort = strtoul(argv[2], &pEnd, 10);
29     if (*pEnd != '