Scoket

Scoket 简单实现通信原理

直接代码 Scoket服务器端代码

#import "AppDelegate.h"
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
@interface AppDelegate ()
{
     //标识服务器
    int server_flag;
     // 标识客户端
    int  client_flag;
    // 地址
    struct sockaddr_in addr;
}
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // 服务器端代码

    //1.创建标示符
    // 参数1:网络类型ipv4 ipv6
    // 参数2:通信协议
    server_flag = socket(AF_INET, SOCK_STREAM, 0);
    //2.将服务器标示符绑定到一个具体的计算机
    // 端口号
    addr.sin_port = htons(9007);
    //
    addr.sin_family = AF_INET;
    // 本机地址
    addr.sin_addr.s_addr = INADDR_ANY;

    //接收返回值
    int error = -1;
    //绑定
     error = bind(server_flag, (struct sockaddr *)&addr, sizeof(addr));
    //3.设置最大连接数
     error = listen(server_flag, 80);
    //4.服务器等待
    while (1) {
    //5.收到客户端请求，生成一个标志位 作为客户端标识
        client_flag = accept(server_flag,NULL,NULL);
    //6.发送信息
        send(client_flag, "Hello,Lanou!", 100, 0);
    //7.接收信息
        char buff[1024];
        long length = 0;
        //
        length = recv(client_flag, buff, 1024, 0);
        buff[length] = '\0';
        // 打印
        printf("client say:%s",buff);

        //8.关闭
        //close(client_flag);   
    }
    return YES;
}

直接代码 Scoket客户端代码

#import "AppDelegate.h"
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
@interface AppDelegate ()
{
  //地址
    struct sockaddr_in server;
  //标示符
    int client_flag;
}
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   //错误信息
    int  error = -1;
   // 生成客户端的标示符
    client_flag = socket(AF_INET, SOCK_STREAM, 0);
   //设置地址
    server.sin_family = AF_INET;
    server.sin_port = htons(9007);
    // 服务器的IP地址
    server.sin_addr.s_addr = inet_addr("172.18.16.158");
    // 建立连接
    error = connect(client_flag, (struct sockaddr *)&server, sizeof(server));
    //发送消息
    send(client_flag, "韩寒", 1024, 0);
    // 接收消息
    char buff[1024];
    long length = 0;
    length = recv(client_flag, buff, 1024, 0);
    buff[length] = '\0';
    printf("server say:%s",buff);
    //关闭
   // close(client_flag);
    return YES;
}