基于openwrt和libssh2实现ssh的远程登录

libssh2的支持

openwrt本身带有libssh和libssh2两种三方库。我们需要修改编译使其参与编译

./scripts/feeds update -a
./scripts/feeds install -a

执行make menuconfig操作，勾选你想要的三方库

ssh服务器的连接

这里需要注意的主要就是makefile里面记得添加ssh2的依赖，要不编译或者运行会出问题，
其他想做的操作，替换新建文件的逻辑就可以

#include "rk_stick.h"


int main(int argc, char **argv)
{
    LIBSSH2_SESSION *session = NULL;
    const char *hostname = "192.168.180.8";
    const char *username = "toybrick";
    const char *password = "toybrick";
    int rc = -1, sock;

    // 初始化libssh2库
    rc = libssh2_init(0);
    if (rc != 0) {
        fprintf(stderr, "Failed to initialize libssh2\n");
        return -1;
    }

    // 创建套接字
    sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock == -1) {
        fprintf(stderr, "Failed to create socket\n");
        return -1;
    }

    // 连接到远程主机
    struct sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = inet_addr(hostname);

    if (connect(sock, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "Failed to connect to remote host\n");
        close(sock);
        return -1;
    }

    // 创建SSH会话
    session = libssh2_session_init();
    if (!session) {
        fprintf(stderr, "Failed to create SSH session\n");
        return -1;
    }

    // 连接到SSH服务器
    rc = libssh2_session_startup(session, sock);
    if (rc) {
        fprintf(stderr, "Failed to establish SSH session\n");
        libssh2_session_free(session);
        return -1;
    }

    // 认证
    rc = libssh2_userauth_password(session, username, password);
    if (rc) {
        fprintf(stderr, "Authentication failed\n");
        libssh2_session_free(session);
        return -1;
    }

    // 执行远程命令
    LIBSSH2_CHANNEL *channel = libssh2_channel_open_session(session);
    if (channel) {
        libssh2_channel_exec(channel, "touch /tmp/test.config");
        libssh2_channel_close(channel);
        libssh2_channel_free(channel);
    }

    // 关闭会话
    libssh2_session_disconnect(session, "Bye bye, thanks for playing");
    libssh2_session_free(session);

    // 关闭libssh2库
    libssh2_exit();

    return 0;
}

结果验证

在服务器的tmp目录下查看是否有test.config文件