Simple version of UDP chat system

Model diagram with data storage

The overall framework

In server

Udp_server.h

The add_user function is used to add new online user information.

1 # pragma once 2 # include 3 # include 4 using namespace std; 5 # include "data_pool.h" 6 # include 7 # include 8 class udp_server 9 {10 public: 11 udp_server (const std::string & ip= "192.168.137.129", const short & port=808 0); 12 ~ udp_server (); 13 void init (); 14 int recv_data (); 15 int send_data (struct sockaddr_in& client,socklen_t len,string& msg) 16 int broadcast (); 17 protected: 18 void add_user (string& key_ip,struct sockaddr_in& client); 19 protected: 20 string _ ip; 21 short _ port; 22 int _ sock; 23 std::map _ online_user; 24 pool_data _ pool_data; 25}

Udp_server.cpp

1 # include "udp_server.h" 2 # include "comm.h" 3 # include "data_pool.h" 4 5 udp_server::udp_server (const std::string & default_ip,const short & default_port) 6: _ ip (default_ip) 7, _ port (default_port) 8 _ sock (- 1) 9 {} 10 11 udp_server::~udp_server () 12 {13 if (_ sock > 0) 14 close (_ sock) 15} 16 17 void udp_server::init () 18 {19 _ sock=socket (AF_INET,SOCK_DGRAM,0); 20 if (_ sock)