Added.

.gitignore

@@ -34,3 +34,4 @@
 # Custom
 build
 *.xcodeproj
+Net.xcodeproj/project.pbxproj

net.cpp

@@ -0,0 +1,24 @@
+//
+//  net.cpp
+//  Net
+//
+//  Created by 胡一兵 on 2019/1/13.
+//  Copyright © 2019年 Bakantu. All rights reserved.
+//
+
+#include "net.hpp"
+
+void process(class Socket &server,int nsfd,struct sockaddr_in c_addr){
+    server.Send(nsfd, "ORDER");
+}
+
+int main(void){
+    char ip[] = "127.0.0.1";
+    Socket server("127.0.0.1",9048,true);
+    server.Listen(10,process);
+    printf("Start to listen\n");
+    server.Accept();
+    return 0;
+}
+
+

net.hpp

@@ -0,0 +1,98 @@
+//
+//  net.hpp
+//  Net
+//
+//  Created by 胡一兵 on 2019/1/13.
+//  Copyright © 2019年 Bakantu. All rights reserved.
+//
+
+#ifndef net_hpp
+#define net_hpp
+
+#include <stdio.h>
+#include <string>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <netdb.h>
+
+using std::string;
+
+class Socket{
+public:
+    struct sockaddr_in c_addr, addr;
+    int nsfd,sfd,port;
+    bool server;
+    void (*func)(class Socket &,int ,struct sockaddr_in);
+    Socket(string ip_addr, int port, bool server = false, bool tcp = true, bool ipv4 = true){
+        memset(&addr, 0, sizeof(struct sockaddr_in));
+        if(ipv4)
+            addr.sin_family = AF_INET;
+        else
+            addr.sin_family = AF_INET6;
+        addr.sin_port = htons(port);
+        this->port = port;
+        addr.sin_addr.s_addr = inet_addr(ip_addr.data());
+        this->server = server;
+        if(server){
+            if(ipv4) sfd = socket(AF_INET,SOCK_STREAM,0);
+            else sfd = socket(AF_INET6,SOCK_STREAM,0);
+            if(!~sfd) throw "fail to get sfd";
+            
+            if(!~bind(sfd, (struct sockaddr *) &addr, sizeof(struct sockaddr))) throw "fail to bind";
+        }
+        else{
+            if(ipv4) sfd = socket(PF_INET,SOCK_STREAM,0);
+            else sfd = socket(PF_INET6,SOCK_STREAM,0);
+            if(!~connect(sfd,(struct sockaddr *)&addr,sizeof(struct sockaddr)))
+                throw "connection fail";
+            
+        }
+    }
+    
+    ~Socket(){
+        close(sfd);
+    }
+    
+    void Listen(int connection, void (*func)(class Socket &,int ,struct sockaddr_in) = NULL){
+        if(server){
+            listen(sfd, 10);
+            this->func = func;
+        }
+    }
+    
+    void Accept(void){
+        if(server){
+            socklen_t scaddr = sizeof(struct sockaddr);
+            nsfd = accept(sfd,(struct sockaddr *) &c_addr, &scaddr);
+            if(~nsfd){
+                if(func != NULL) func(*this,nsfd,c_addr);
+                close(nsfd);
+            }
+        }
+    }
+    
+    
+    
+    void Send(int t_nsfd, string buff){
+        ssize_t len = send(t_nsfd,buff.data(),buff.size(),0);
+        if(len != buff.size()) throw "size unmatch";
+    }
+    
+    string Recv(int t_nsfd){
+        char buff[BUFSIZ];
+        ssize_t len=recv(t_nsfd,buff,BUFSIZ,0);
+        if(len > 0){
+            buff[len] = '\0';
+            string str = buff;
+            return str;
+        }
+        else throw "receive fail";
+        
+    }
+};
+
+#endif /* net_hpp */