示例#1
0
文件: ssh.c 项目: J-Liu/qemu
static void ssh_seek(BDRVSSHState *s, int64_t offset, int flags)
{
    bool op_read = (flags & SSH_SEEK_READ) != 0;
    bool force = (flags & SSH_SEEK_FORCE) != 0;

    if (force || op_read != s->offset_op_read || offset != s->offset) {
        DPRINTF("seeking to offset=%" PRIi64, offset);
        libssh2_sftp_seek64(s->sftp_handle, offset);
        s->offset = offset;
        s->offset_op_read = op_read;
    }
}
示例#2
0
文件: ssh.c 项目: Pating/qemu-colo
static int ssh_create(const char *filename, QemuOpts *opts, Error **errp)
{
    int r, ret;
    int64_t total_size = 0;
    QDict *uri_options = NULL;
    BDRVSSHState s;
    ssize_t r2;
    char c[1] = { '\0' };

    ssh_state_init(&s);

    /* Get desired file size. */
    total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
                          BDRV_SECTOR_SIZE);
    DPRINTF("total_size=%" PRIi64, total_size);

    uri_options = qdict_new();
    r = parse_uri(filename, uri_options, errp);
    if (r < 0) {
        ret = r;
        goto out;
    }

    r = connect_to_ssh(&s, uri_options,
                       LIBSSH2_FXF_READ|LIBSSH2_FXF_WRITE|
                       LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,
                       0644, errp);
    if (r < 0) {
        ret = r;
        goto out;
    }

    if (total_size > 0) {
        libssh2_sftp_seek64(s.sftp_handle, total_size-1);
        r2 = libssh2_sftp_write(s.sftp_handle, c, 1);
        if (r2 < 0) {
            sftp_error_setg(errp, &s, "truncate failed");
            ret = -EINVAL;
            goto out;
        }
        s.attrs.filesize = total_size;
    }

    ret = 0;

 out:
    ssh_state_free(&s);
    if (uri_options != NULL) {
        QDECREF(uri_options);
    }
    return ret;
}
示例#3
0
文件: file.c 项目: LubkaB/mc
off_t
sftpfs_lseek (vfs_file_handler_t * file_handler, off_t offset, int whence, GError ** error)
{
    sftpfs_file_handler_data_t *file_handler_data;

    switch (whence)
    {
    case SEEK_SET:
        /* Need reopen file because:
           "You MUST NOT seek during writing or reading a file with SFTP, as the internals use
           outstanding packets and changing the "file position" during transit will results in
           badness." */
        if (file_handler->pos > offset || offset == 0)
        {
            sftpfs_reopen (file_handler, error);
            if (error != NULL && *error != NULL)
                return 0;
        }
        file_handler->pos = offset;
        break;
    case SEEK_CUR:
        file_handler->pos += offset;
        break;
    case SEEK_END:
        if (file_handler->pos > file_handler->ino->st.st_size - offset)
        {
            sftpfs_reopen (file_handler, error);
            if (error != NULL && *error != NULL)
                return 0;
        }
        file_handler->pos = file_handler->ino->st.st_size - offset;
        break;
    }

    file_handler_data = (sftpfs_file_handler_data_t *) file_handler->data;

    libssh2_sftp_seek64 (file_handler_data->handle, file_handler->pos);
    file_handler->pos = (off_t) libssh2_sftp_tell64 (file_handler_data->handle);

    return file_handler->pos;
}
示例#4
0
文件: file.c 项目: LubkaB/mc
gboolean
sftpfs_open_file (vfs_file_handler_t * file_handler, int flags, mode_t mode, GError ** error)
{
    unsigned long sftp_open_flags = 0;
    int sftp_open_mode = 0;
    gboolean do_append = FALSE;
    sftpfs_file_handler_data_t *file_handler_data;
    sftpfs_super_data_t *super_data;
    char *name;

    (void) mode;

    name = vfs_s_fullpath (&sftpfs_class, file_handler->ino);
    if (name == NULL)
        return FALSE;

    super_data = (sftpfs_super_data_t *) file_handler->ino->super->data;
    file_handler_data = g_new0 (sftpfs_file_handler_data_t, 1);

    if ((flags & O_CREAT) != 0 || (flags & O_WRONLY) != 0)
    {
        sftp_open_flags = (flags & O_WRONLY) != 0 ? LIBSSH2_FXF_WRITE : 0;
        sftp_open_flags |= (flags & O_CREAT) != 0 ? LIBSSH2_FXF_CREAT : 0;
        if ((flags & O_APPEND) != 0)
        {
            sftp_open_flags |= LIBSSH2_FXF_APPEND;
            do_append = TRUE;
        }
        sftp_open_flags |= (flags & O_TRUNC) != 0 ? LIBSSH2_FXF_TRUNC : 0;

        sftp_open_mode = LIBSSH2_SFTP_S_IRUSR |
            LIBSSH2_SFTP_S_IWUSR | LIBSSH2_SFTP_S_IRGRP | LIBSSH2_SFTP_S_IROTH;
    }
    else
        sftp_open_flags = LIBSSH2_FXF_READ;

    while (TRUE)
    {
        int libssh_errno;

        file_handler_data->handle =
            libssh2_sftp_open (super_data->sftp_session, sftpfs_fix_filename (name),
                               sftp_open_flags, sftp_open_mode);

        if (file_handler_data->handle != NULL)
            break;

        libssh_errno = libssh2_session_last_errno (super_data->session);
        if (libssh_errno != LIBSSH2_ERROR_EAGAIN)
        {
            sftpfs_ssherror_to_gliberror (super_data, libssh_errno, error);
            g_free (name);
            g_free (file_handler_data);
            return FALSE;
        }
    }

    g_free (name);

    file_handler_data->flags = flags;
    file_handler_data->mode = mode;
    file_handler->data = file_handler_data;

    if (do_append)
    {
        struct stat file_info;

        if (sftpfs_fstat (file_handler, &file_info, error) == 0)
            libssh2_sftp_seek64 (file_handler_data->handle, file_info.st_size);
    }
    return TRUE;
}
int main(int argc, char *argv[])
{
    unsigned long hostaddr;
    int sock, i, auth_pw = 1;
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
    const char *username="******";
    const char *password="******";
    const char *loclfile="sftp_write.c";
    const char *sftppath="/tmp/TEST";
    int rc;
    FILE *local;
    LIBSSH2_SFTP *sftp_session;
    LIBSSH2_SFTP_HANDLE *sftp_handle;
    LIBSSH2_SFTP_ATTRIBUTES attrs;
    char mem[1024*100];
    size_t nread;
    char *ptr;

#ifdef WIN32
    WSADATA wsadata;

    WSAStartup(MAKEWORD(2,0), &wsadata);
#endif

    if (argc > 1) {
        hostaddr = inet_addr(argv[1]);
    } else {
        hostaddr = htonl(0x7F000001);
    }

    if(argc > 2) {
        username = argv[2];
    }
    if(argc > 3) {
        password = argv[3];
    }
    if(argc > 4) {
        loclfile = argv[4];
    }
    if(argc > 5) {
        sftppath = argv[5];
    }

    rc = libssh2_init (0);
    if (rc != 0) {
        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    local = fopen(loclfile, "rb");
    if (!local) {
        printf("Can't local file %s\n", loclfile);
        return -1;
    }

    /*
     * The application code is responsible for creating the socket
     * and establishing the connection
     */
    sock = socket(AF_INET, SOCK_STREAM, 0);

    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
    if (connect(sock, (struct sockaddr*)(&sin),
            sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }

    /* Create a session instance
     */
    session = libssh2_session_init();
    if(!session)
        return -1;

    /* Since we have set non-blocking, tell libssh2 we are blocking */
    libssh2_session_set_blocking(session, 1);

    /* ... start it up. This will trade welcome banners, exchange keys,
     * and setup crypto, compression, and MAC layers
     */
    rc = libssh2_session_startup(session, sock);
    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
    }

    /* At this point we havn't yet authenticated.  The first thing to do
     * is check the hostkey's fingerprint against our known hosts Your app
     * may have it hard coded, may go to a file, may present it to the
     * user, that's your call
     */
    fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
    printf("Fingerprint: ");
    for(i = 0; i < 20; i++) {
        printf("%02X ", (unsigned char)fingerprint[i]);
    }
    printf("\n");

    if (auth_pw) {
        /* We could authenticate via password */
        if (libssh2_userauth_password(session, username, password)) {
            printf("Authentication by password failed.\n");
            goto shutdown;
        }
    } else {
        /* Or by public key */
        if (libssh2_userauth_publickey_fromfile(session, username,
                            "/home/username/.ssh/id_rsa.pub",
                            "/home/username/.ssh/id_rsa",
                            password)) {
            printf("\tAuthentication by public key failed\n");
            goto shutdown;
        }
    }

    fprintf(stderr, "libssh2_sftp_init()!\n");
    sftp_session = libssh2_sftp_init(session);

    if (!sftp_session) {
        fprintf(stderr, "Unable to init SFTP session\n");
        goto shutdown;
    }

    fprintf(stderr, "libssh2_sftp_open() for READ and WRITE!\n");
    /* Request a file via SFTP */

    sftp_handle =
        libssh2_sftp_open(sftp_session, sftppath,
                          LIBSSH2_FXF_WRITE|LIBSSH2_FXF_READ,
                          LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
                          LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);
    if (!sftp_handle) {
        fprintf(stderr, "Unable to open file with SFTP\n");
        goto shutdown;
    }

    if(libssh2_sftp_fstat_ex(sftp_handle, &attrs, 0) < 0) {
        printf("libssh2_sftp_fstat_ex failed\n");
        goto shutdown;
    }
    else
        libssh2_sftp_seek64(sftp_handle, attrs.filesize);
    printf("Did a seek to position %ld\n", (long) attrs.filesize);

    fprintf(stderr, "libssh2_sftp_open() a handle for APPEND\n");

    if (!sftp_handle) {
        fprintf(stderr, "Unable to open file with SFTP\n");
        goto shutdown;
    }
    fprintf(stderr, "libssh2_sftp_open() is done, now send data!\n");
    do {
        nread = fread(mem, 1, sizeof(mem), local);
        if (nread <= 0) {
            /* end of file */
            break;
        }
        ptr = mem;

        do {
            /* write data in a loop until we block */
            rc = libssh2_sftp_write(sftp_handle, ptr, nread);
            if(rc < 0)
                break;
            ptr += rc;
            nread -= rc;
        } while (nread);

    } while (rc > 0);

    libssh2_sftp_close(sftp_handle);
    libssh2_sftp_shutdown(sftp_session);

shutdown:
    libssh2_session_disconnect(session,
                               "Normal Shutdown, Thank you for playing");
    libssh2_session_free(session);

#ifdef WIN32
    closesocket(sock);
#else
    close(sock);
#endif
    if (local)
        fclose(local);
    printf("all done\n");

    libssh2_exit();

    return 0;
}