网口转串口

client.py

from socket import *

HOST = '192.168.1.14' # or 'localhost'
PORT = 8887
BUFSIZ =1024
ADDR = (HOST,PORT)

tcpCliSock = socket(AF_INET,SOCK_STREAM)
tcpCliSock.connect(ADDR)
while True:
     data1 = input('>')
     #data = str(data)
     if not data1:
         break
     tcpCliSock.send(data1.encode())
     data1 = tcpCliSock.recv(BUFSIZ)
     if not data1:
         break
     print(data1.decode('utf-8'))
tcpCliSock.close()

com.py

#! /usr/bin/env python

#coding=utf-8

import pty
import os
import select

def mkpty():
    #
    master1, slave = pty.openpty()
    slaveName1 = os.ttyname(slave)
    master2, slave = pty.openpty()
    slaveName2 = os.ttyname(slave)
    print '/nslave device names: ', slaveName1, slaveName2
    return master1, master2

if __name__ == "__main__":

    master1, master2 = mkpty()
    while True:        
        rl, wl, el = select.select([master1,master2], [], [], 1)
        for master in rl:
            data = os.read(master, 128)
            if master==master1:
                print "master1 receive data: %d data:" % len(data)
                print data
            else:
                print "master2 receive data: %d data:" % len(data)
                print data

client.c

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/shm.h>
 
#define MYPORT  8887
#define BUFFER_SIZE 1024
 
int main()
{
    ///定义sockfd
    int sock_cli = socket(AF_INET,SOCK_STREAM, 0);
 
    ///定义sockaddr_in
    struct sockaddr_in servaddr;
    memset(&servaddr, 0, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(MYPORT);  ///服务器端口
    servaddr.sin_addr.s_addr = inet_addr("xxxxxx");  ///服务器ip
 
    ///连接服务器，成功返回0，错误返回-1
    if (connect(sock_cli, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
    {
        perror("connect");
        exit(1);
    }
 
    char sendbuf[BUFFER_SIZE];
    char recvbuf[BUFFER_SIZE];
    while (fgets(sendbuf, sizeof(sendbuf), stdin) != NULL)
    {
//	int len = strlen(sendbuf);
//	if(sendbuf[len-1] == '
'){sendbuf[len--]=0;}
	printf("send:%s",sendbuf);
        send(sock_cli, sendbuf, strlen(sendbuf),0); ///发送
        recv(sock_cli, recvbuf, strlen(recvbuf),0); ///接收
        fputs(recvbuf, stdout);
        memset(sendbuf, 0, sizeof(sendbuf));
        memset(recvbuf, 0, sizeof(recvbuf));
    }
 
    close(sock_cli);
    return 0;
}

server.c

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/shm.h>
#include <asm/termios.h>
#define DEV_NAME  "/dev/pts/1"
#define MYPORT  8887
#define QUEUE   20
#define BUFFER_SIZE 1024

int mainFunction()
{
    int fd;//serial port
    ///定义sockfd
    int server_sockfd = socket(AF_INET,SOCK_STREAM, 0);

    ///定义sockaddr_in
    struct sockaddr_in server_sockaddr;
    server_sockaddr.sin_family = AF_INET;
    server_sockaddr.sin_port = htons(MYPORT);
    server_sockaddr.sin_addr.s_addr = htonl(INADDR_ANY);

    fd = open(DEV_NAME, O_RDWR | O_NOCTTY);
	if(fd < 0) 
	{
			perror(DEV_NAME);
			return -1;
	}
    printf("port is ready
");
    cfsetispeed(fd,115200);  
    cfsetospeed(fd,115200); 
    //bind，成功返回0，出错返回-1
    while(bind(server_sockfd,(struct sockaddr *)&server_sockaddr,sizeof(server_sockaddr))==-1)
    {
        
	;
    }

    ///listen，成功返回0，出错返回-1
    if(listen(server_sockfd,QUEUE) == -1)
    {
        perror("listen error
");
	return;
    }

    ///客户端套接字
    char buffer[BUFFER_SIZE];
    struct sockaddr_in client_addr;
    socklen_t length = sizeof(client_addr);

    ///成功返回非负描述字，出错返回-1
    int conn = accept(server_sockfd, (struct sockaddr*)&client_addr, &length);
    if(conn<0)
    {
        perror("connect error
");
	return;
    }

    while(1)
    {
        memset(buffer,0,sizeof(buffer));
        int len = recv(conn, buffer, sizeof(buffer),0);
	if(len<=0)
        {
            printf("maybe disconnected... restart:
");
            break;
        }
//	if(buffer[0]=='
')
//	{
//	    printf("end by user");
//	    break;
//	}
	len = write(fd, buffer,len);
	if (len < 0) {
		printf("write data error 
");
		break;
	}
        send(conn,buffer, len, 0);
    }
    close(conn);
    close(server_sockfd);

}
void main()
{
    while(1)
    {
        mainFunction();
    }
}