win2win（windows之间局域网文件传输）

简介

　　这是一个基于C语言编写的控制台程序，可以在VS平台下编译。

使用场景

　　由于Windows之间自带的文件共享太费事，步骤太繁琐，于是参考网络文章Ctrl+C了一个凑出了一个小工具，主要实现网线直连或者同网段的局域网内的两台Windows电脑之间的文件传输。程序基于TCP协议传输，因此在运行程序之前，确保两台电脑正确配置了IP地址，并且保证IP地址在同一网段即可。出版本单线程，传输中小文件还是够用的，后续有空会更新出多线程并发以提高传输效率。

使用方法

完整源代码（win2win.c）：下面是完整的源代码（单文件），直接新建一个 Visual Studio C++ 的控制台应用程序工程，然后把内容贴进去编译即可。

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#include<stdio.h>
#include<Winsock2.h>
#include<time.h>
#include<string.h>
#include <stdint.h>
#pragma warning(disable:4996)
#pragma comment(lib,"ws2_32.lib")
 
// Server fixed to be recv people
// Client fixed to be send people
 
#define USER_ERROR -1
#define MAX_PACKET_SIZE 2048
 
long getFileSize(const char *FileName)
{
    FILE *fp = fopen(FileName, "rb");
    if (fp == NULL)
        return 0;
 
    fseek(fp, 0, SEEK_END);
    long fsize = ftell(fp);
    fclose(fp);
 
    return fsize;
}
 
void printProcess(double cur, double total)
{
    long percent = cur / total * 100;
    printf("Finished %%%d\r", percent);
    fflush(stdout);
}
 
long str2num(const char *str)
{
    char *endptr;
    return strtol(str, &endptr, 0);
}
 
int main_server(uint16_t bindPort)
{
    char recvData[MAX_PACKET_SIZE];
    int ret;
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        printf("Failed to load Winsock.\n");
        return USER_ERROR;
    }
 
    SOCKET socket_of_server;
    SOCKET socket_of_client;
    socket_of_server = socket(AF_INET, SOCK_STREAM, 0);
    if (socket_of_server == INVALID_SOCKET)
    {
        printf("socket() Failed:%d\n", WSAGetLastError());
        return USER_ERROR;
    }
 
    struct sockaddr_in s_sin;
    s_sin.sin_family = AF_INET;
    s_sin.sin_port = htons(bindPort);
    s_sin.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    if (bind(socket_of_server, (LPSOCKADDR)&s_sin, sizeof(s_sin)) == SOCKET_ERROR)
    {
        printf("blind() Failed:%d\n", WSAGetLastError());
        return USER_ERROR;
    }
    if (listen(socket_of_server, 5) == SOCKET_ERROR)
    {
        printf("listen() Failed:%d\n", WSAGetLastError());
        return USER_ERROR;
    }
    struct sockaddr_in c_sin;
    int c_sin_len = sizeof(c_sin);
 
    int loopflag = 1;
    while (loopflag)
    {
        printf("Waiting for Connection ...\n");
        socket_of_client = accept(socket_of_server, (SOCKADDR *)&c_sin, &c_sin_len);
        if (socket_of_client == INVALID_SOCKET)
            printf("accept() Failed:%d\n", WSAGetLastError());
        else
        {
            printf("Get New Connection IP: %s\r\n", inet_ntoa(c_sin.sin_addr));
 
            memset(recvData, 0, sizeof(recvData));
            ret = recv(socket_of_client, recvData, sizeof(recvData), 0);
            printf("Get File Name: %s\n", recvData);
 
            FILE *fp = fopen(recvData, "wb+");
            if (fp == NULL)
            {
                fprintf(stderr, "fopen() %s failed, %s\n", recvData, strerror(errno));
                return -1;
            }
 
            memset(recvData, 0, sizeof(recvData));
            ret = recv(socket_of_client, recvData, sizeof(recvData), 0);
            long fsize = ntohl(*((long *)recvData));
            printf("Get File Size: %ld\n", fsize);
            printf("Get File Content ...\n");
 
            long length = 0;
            long curoff = 0;
            long remain = fsize;
            while (1)
            {
                length = recv(socket_of_client, recvData, sizeof(recvData), 0);
                if (length > 0)
                {
                    //printf("Get length is %ld\n", length);
                    fwrite(recvData, 1, length, fp);
                    curoff += length;
                    remain -= length;
                    printProcess((double)curoff, fsize);
                }
 
                if (remain <= 0)
                {
                    break;
                }
            }
 
            printf("\nGet File Complete!\n");
            loopflag = 0;
            fclose(fp);
        }
    }
 
    closesocket(socket_of_server);
    WSACleanup();
    return 0;
}
 
 
 
int main_client(const char *FileName, const char *toIP, uint16_t toPort)
{
    char sendData[MAX_PACKET_SIZE];
    int ret;
 
 
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        printf("WSAStartup() failed.\n");
        return USER_ERROR;
    }
 
    SOCKET socket_client = socket(AF_INET, SOCK_STREAM, 0);
    if (socket_client == INVALID_SOCKET)
    {
        printf(" Failed socket() \n");
        return 0;
    }
 
    struct sockaddr_in server_in;
    server_in.sin_family = AF_INET;
    server_in.sin_port = htons(toPort);
    server_in.sin_addr.S_un.S_addr = inet_addr(toIP);
 
    if (connect(socket_client, (struct sockaddr*)&server_in, sizeof(server_in)) == -1)
    {
        printf(" Failed connect() \n");
        return 0;
    }
    else
    {
        printf("Connecting to IP:%s, Port:%d\n", inet_ntoa(server_in.sin_addr), server_in.sin_port);
 
        memset(sendData, 0, sizeof(sendData));
        strcpy(sendData, FileName);
        send(socket_client, sendData, sizeof(sendData), 0);
        printf("Put File Name: %s\n", FileName);
 
        memset(sendData, 0, sizeof(sendData));
        long fsize = getFileSize(FileName);
        *((long *)sendData) = htonl(fsize);
        send(socket_client, sendData, sizeof(sendData), 0);
        printf("Put File Size: %ld\n", fsize);
        printf("Put File Content ...\n");
 
        if (fsize <= 0)
        {
            goto end_connect;
        }
 
        Sleep(1000);//1000ms
 
        FILE *fp = fopen(FileName, "rb");
        if (fp == NULL)
        {
            fprintf(stderr, "fopen() %s failed, %s\n", FileName, strerror(errno));
            exit(1);
        }
 
        long remain = fsize;
        long length = 0;
        long curoff = 0;
        while (1)
        {
            memset(sendData, 0, sizeof(sendData));
            length = fread(sendData, 1, sizeof(sendData), fp);
            if (length > 0)
            {
                //printf("Put length is %ld\n", length);
                send(socket_client, sendData, sizeof(sendData), 0);
                curoff += length;
                remain -= length;
                printProcess((double)curoff, fsize);
            }
            else
            {
                break;
            }
        }
        printf("\nPut File Complete!\n");
        fclose(fp);
    }
 
end_connect:
    closesocket(socket_client);
    WSACleanup();
    return 0;
}
 
void cmd_help(const char *exe)
{
    fprintf(stderr, "Usage: %s  <R|T>  [FileName] [IP] [Port]\n", exe);
    fprintf(stderr, "  e.g: %s   R  6666                        --Rx From Port 6666\n", exe);
    fprintf(stderr, "  e.g: %s   T  hello.txt  127.0.0.1  6666  --Tx To Port 6666\n", exe);
    fprintf(stderr, " Note:\n");
    fprintf(stderr, "       T    --Tx File\n");
    fprintf(stderr, "       R    --Rx File\n");
    fprintf(stderr, "        \n");
    fprintf(stderr, "Author: seafly0616@qq.com\n");
    fprintf(stderr, "Reference link: https://blog.csdn.net/sinat_37372543/article/details/87989599\n");
}
 
int main(int argc, const char *argv[])
{
    if (argc < 2)
    {
        cmd_help(argv[0]);
        return -1;
    }
 
    const char *optstr = argv[1];
 
    switch (*optstr)
    {
    case 'T':
    {
        if (argc != 5)
        {
            cmd_help(argv[0]);
            return -1;
        }
        const char *FileName = argv[2];
        const char *toIP = argv[3];
        uint16_t toPort = str2num(argv[4]);
        main_client(FileName, toIP, toPort);
        break;
    }
    case 'R':
    {
        if (argc != 3)
        {
            cmd_help(argv[0]);
            return -1;
        }
        uint16_t bindPort = str2num(argv[2]);
        main_server(bindPort);
        break;
    }
    default:
    {
        fprintf(stderr, "Error: Invalid option '%c' \n", *optstr);
        cmd_help(argv[0]);
        break;
    }
 
    }
 
    return 0;
}
//原文链接：https ://blog.csdn.net/sinat_37372543/article/details/87989599