ssh.c

    rc = libssh2_sftp_stat(sshc->sftp_session, sshc->quote_path2,
                           &sshc->quote_attrs);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc != 0) { /* get those attributes */
      err = libssh2_sftp_last_error(sshc->sftp_session);
      Curl_safefree(sshc->quote_path1);
      sshc->quote_path1 = NULL;
      Curl_safefree(sshc->quote_path2);
      sshc->quote_path2 = NULL;
      failf(data, "Attempt to get SFTP stats failed: %s",
            sftp_libssh2_strerror(err));
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_QUOTE_ERROR;
      break;
    }

    /* Now set the new attributes... */
    if(curl_strnequal(sshc->quote_item->data, "chgrp", 5)) {
      sshc->quote_attrs.gid = strtol(sshc->quote_path1, NULL, 10);
      if(sshc->quote_attrs.gid == 0 && !ISDIGIT(sshc->quote_path1[0])) {
        Curl_safefree(sshc->quote_path1);
        sshc->quote_path1 = NULL;
        Curl_safefree(sshc->quote_path2);
        sshc->quote_path2 = NULL;
        failf(data, "Syntax error: chgrp gid not a number");
        state(conn, SSH_SFTP_CLOSE);
        sshc->actualcode = CURLE_QUOTE_ERROR;
        break;
      }
    }
    else if(curl_strnequal(sshc->quote_item->data, "chmod", 5)) {
      sshc->quote_attrs.permissions = strtol(sshc->quote_path1, NULL, 8);
      /* permissions are octal */
      if(sshc->quote_attrs.permissions == 0 &&
         !ISDIGIT(sshc->quote_path1[0])) {
        Curl_safefree(sshc->quote_path1);
        sshc->quote_path1 = NULL;
        Curl_safefree(sshc->quote_path2);
        sshc->quote_path2 = NULL;
        failf(data, "Syntax error: chmod permissions not a number");
        state(conn, SSH_SFTP_CLOSE);
        sshc->actualcode = CURLE_QUOTE_ERROR;
        break;
      }
    }
    else if(curl_strnequal(sshc->quote_item->data, "chown", 5)) {
      sshc->quote_attrs.uid = strtol(sshc->quote_path1, NULL, 10);
      if(sshc->quote_attrs.uid == 0 && !ISDIGIT(sshc->quote_path1[0])) {
        Curl_safefree(sshc->quote_path1);
        sshc->quote_path1 = NULL;
        Curl_safefree(sshc->quote_path2);
        sshc->quote_path2 = NULL;
        failf(data, "Syntax error: chown uid not a number");
        state(conn, SSH_SFTP_CLOSE);
        sshc->actualcode = CURLE_QUOTE_ERROR;
        break;
      }
    }

    /* Now send the completed structure... */
    state(conn, SSH_SFTP_QUOTE_SETSTAT);
    break;

  case SSH_SFTP_QUOTE_SETSTAT:
    rc = libssh2_sftp_setstat(sshc->sftp_session, sshc->quote_path2,
                              &sshc->quote_attrs);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc != 0) {
      err = libssh2_sftp_last_error(sshc->sftp_session);
      Curl_safefree(sshc->quote_path1);
      sshc->quote_path1 = NULL;
      Curl_safefree(sshc->quote_path2);
      sshc->quote_path2 = NULL;
      failf(data, "Attempt to set SFTP stats failed: %s",
            sftp_libssh2_strerror(err));
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_QUOTE_ERROR;
      break;
    }
    state(conn, SSH_SFTP_NEXT_QUOTE);
    break;

  case SSH_SFTP_QUOTE_SYMLINK:
    rc = libssh2_sftp_symlink(sshc->sftp_session, sshc->quote_path1,
                              sshc->quote_path2);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc != 0) {
      err = libssh2_sftp_last_error(sshc->sftp_session);
      Curl_safefree(sshc->quote_path1);
      sshc->quote_path1 = NULL;
      Curl_safefree(sshc->quote_path2);
      sshc->quote_path2 = NULL;
      failf(data, "symlink command failed: %s",
            sftp_libssh2_strerror(err));
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_QUOTE_ERROR;
      break;
    }
    state(conn, SSH_SFTP_NEXT_QUOTE);
    break;

  case SSH_SFTP_QUOTE_MKDIR:
    rc = libssh2_sftp_mkdir(sshc->sftp_session, sshc->quote_path1, 0755);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc != 0) {
      err = libssh2_sftp_last_error(sshc->sftp_session);
      Curl_safefree(sshc->quote_path1);
      sshc->quote_path1 = NULL;
      failf(data, "mkdir command failed: %s", sftp_libssh2_strerror(err));
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_QUOTE_ERROR;
      break;
    }
    state(conn, SSH_SFTP_NEXT_QUOTE);
    break;

  case SSH_SFTP_QUOTE_RENAME:
    rc = libssh2_sftp_rename(sshc->sftp_session, sshc->quote_path1,
                             sshc->quote_path2);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc != 0) {
      err = libssh2_sftp_last_error(sshc->sftp_session);
      Curl_safefree(sshc->quote_path1);
      sshc->quote_path1 = NULL;
      Curl_safefree(sshc->quote_path2);
      sshc->quote_path2 = NULL;
      failf(data, "rename command failed: %s", sftp_libssh2_strerror(err));
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_QUOTE_ERROR;
      break;
    }
    state(conn, SSH_SFTP_NEXT_QUOTE);
    break;

  case SSH_SFTP_QUOTE_RMDIR:
    rc = libssh2_sftp_rmdir(sshc->sftp_session, sshc->quote_path1);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc != 0) {
      err = libssh2_sftp_last_error(sshc->sftp_session);
      Curl_safefree(sshc->quote_path1);
      sshc->quote_path1 = NULL;
      failf(data, "rmdir command failed: %s", sftp_libssh2_strerror(err));
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_QUOTE_ERROR;
      break;
    }
    state(conn, SSH_SFTP_NEXT_QUOTE);
    break;

  case SSH_SFTP_QUOTE_UNLINK:
    rc = libssh2_sftp_unlink(sshc->sftp_session, sshc->quote_path1);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc != 0) {
      err = libssh2_sftp_last_error(sshc->sftp_session);
      Curl_safefree(sshc->quote_path1);
      sshc->quote_path1 = NULL;
      failf(data, "rm command failed: %s", sftp_libssh2_strerror(err));
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_QUOTE_ERROR;
      break;
    }
    state(conn, SSH_SFTP_NEXT_QUOTE);
    break;

  case SSH_SFTP_TRANS_INIT:
    if(data->set.upload)
      state(conn, SSH_SFTP_UPLOAD_INIT);
    else {
      if(sftp_scp->path[strlen(sftp_scp->path)-1] == '/')
        state(conn, SSH_SFTP_READDIR_INIT);
      else
        state(conn, SSH_SFTP_DOWNLOAD_INIT);
    }
    break;

  case SSH_SFTP_UPLOAD_INIT:
    /*
     * NOTE!!!  libssh2 requires that the destination path is a full path
     *          that includes the destination file and name OR ends in a "/"
     *          If this is not done the destination file will be named the
     *          same name as the last directory in the path.
     */

    if(data->state.resume_from != 0) {
      LIBSSH2_SFTP_ATTRIBUTES attrs;
      if(data->state.resume_from< 0) {
        rc = libssh2_sftp_stat(sshc->sftp_session, sftp_scp->path, &attrs);
        if(rc == LIBSSH2_ERROR_EAGAIN) {
          break;
        }
        else if(rc) {
          data->state.resume_from = 0;
        }
        else {
          data->state.resume_from = attrs.filesize;
        }
      }
    }

    sshc->sftp_handle =
      libssh2_sftp_open(sshc->sftp_session, sftp_scp->path,
                        /* If we have restart position then open for append */
                        (data->state.resume_from > 0)?
                        LIBSSH2_FXF_WRITE|LIBSSH2_FXF_APPEND:
                        LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,
                        data->set.new_file_perms);

    if(!sshc->sftp_handle) {
      if(libssh2_session_last_errno(sshc->ssh_session) ==
         LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else {
        err = libssh2_sftp_last_error(sshc->sftp_session);
        failf(data, "Upload failed: %s", sftp_libssh2_strerror(err));
        if(sshc->secondCreateDirs) {
          state(conn, SSH_SFTP_CLOSE);
          sshc->actualcode = sftp_libssh2_error_to_CURLE(err);
          break;
        }
        else if(((err == LIBSSH2_FX_NO_SUCH_FILE) ||
                 (err == LIBSSH2_FX_FAILURE) ||
                 (err == LIBSSH2_FX_NO_SUCH_PATH)) &&
                (data->set.ftp_create_missing_dirs &&
                 (strlen(sftp_scp->path) > 1))) {
          /* try to create the path remotely */
          sshc->secondCreateDirs = 1;
          state(conn, SSH_SFTP_CREATE_DIRS_INIT);
          break;
        }
        state(conn, SSH_SFTP_CLOSE);
        sshc->actualcode = sftp_libssh2_error_to_CURLE(err);
        break;
      }
    }

    /* If we have restart point then we need to seek to the correct position. */
    if(data->state.resume_from > 0) {
      /* Let's read off the proper amount of bytes from the input. */
      if(conn->seek_func) {
        curl_off_t readthisamountnow = data->state.resume_from;

        if(conn->seek_func(conn->seek_client,
                           readthisamountnow, SEEK_SET) != 0) {
          failf(data, "Could not seek stream");
          return CURLE_FTP_COULDNT_USE_REST;
        }
      }
      else {
        curl_off_t passed=0;
        curl_off_t readthisamountnow;
        curl_off_t actuallyread;
        do {
          readthisamountnow = (data->state.resume_from - passed);

          if(readthisamountnow > BUFSIZE)
            readthisamountnow = BUFSIZE;

          actuallyread =
            (curl_off_t) conn->fread_func(data->state.buffer, 1,
                                          (size_t)readthisamountnow,
                                          conn->fread_in);

          passed += actuallyread;
          if((actuallyread <= 0) || (actuallyread > readthisamountnow)) {
            /* this checks for greater-than only to make sure that the
               CURL_READFUNC_ABORT return code still aborts */
             failf(data, "Failed to read data");
            return CURLE_FTP_COULDNT_USE_REST;
          }
        } while(passed < data->state.resume_from);
      }

      /* now, decrease the size of the read */
      if(data->set.infilesize>0) {
        data->set.infilesize -= data->state.resume_from;
        data->req.size = data->set.infilesize;
        Curl_pgrsSetUploadSize(data, data->set.infilesize);
      }

      libssh2_sftp_seek(sshc->sftp_handle, data->state.resume_from);
    }
    if(data->set.infilesize>0) {
      data->req.size = data->set.infilesize;
      Curl_pgrsSetUploadSize(data, data->set.infilesize);
    }
    /* upload data */
    result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL,
                                 FIRSTSOCKET, NULL);

    if(result) {
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = result;
    }
    else {
      state(conn, SSH_STOP);
    }
    break;

  case SSH_SFTP_CREATE_DIRS_INIT:
    if(strlen(sftp_scp->path) > 1) {
      sshc->slash_pos = sftp_scp->path + 1; /* ignore the leading '/' */
      state(conn, SSH_SFTP_CREATE_DIRS);
    }
    else {
      state(conn, SSH_SFTP_UPLOAD_INIT);
    }
    break;

  case SSH_SFTP_CREATE_DIRS:
    if((sshc->slash_pos = strchr(sshc->slash_pos, '/')) != NULL) {
      *sshc->slash_pos = 0;

      infof(data, "Creating directory '%s'\n", sftp_scp->path);
      state(conn, SSH_SFTP_CREATE_DIRS_MKDIR);
      break;
    }
    else {
      state(conn, SSH_SFTP_UPLOAD_INIT);
    }
    break;

  case SSH_SFTP_CREATE_DIRS_MKDIR:
    /* 'mode' - parameter is preliminary - default to 0644 */
    rc = libssh2_sftp_mkdir(sshc->sftp_session, sftp_scp->path,
                            data->set.new_directory_perms);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    *sshc->slash_pos = '/';
    ++sshc->slash_pos;
    if(rc == -1) {
      unsigned int sftp_err = 0;
      /*
       * abort if failure wasn't that the dir already exists or the
       * permission was denied (creation might succeed further
       * down the path) - retry on unspecific FAILURE also
       */
      sftp_err = libssh2_sftp_last_error(sshc->sftp_session);
      if((sftp_err != LIBSSH2_FX_FILE_ALREADY_EXISTS) &&
         (sftp_err != LIBSSH2_FX_FAILURE) &&
         (sftp_err != LIBSSH2_FX_PERMISSION_DENIED)) {
        result = sftp_libssh2_error_to_CURLE(sftp_err);
        state(conn, SSH_SFTP_CLOSE);
        sshc->actualcode = result;
        break;
      }
    }
    state(conn, SSH_SFTP_CREATE_DIRS);
    break;

  case SSH_SFTP_READDIR_INIT:
    /*
     * This is a directory that we are trying to get, so produce a
     * directory listing
     */
    sshc->sftp_handle = libssh2_sftp_opendir(sshc->sftp_session,
                                             sftp_scp->path);
    if(!sshc->sftp_handle) {
      if(libssh2_session_last_errno(sshc->ssh_session) ==
         LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else {
        err = libssh2_sftp_last_error(sshc->sftp_session);
        failf(data, "Could not open directory for reading: %s",
              sftp_libssh2_strerror(err));
        state(conn, SSH_SFTP_CLOSE);
        sshc->actualcode = sftp_libssh2_error_to_CURLE(err);
        break;
      }
    }
    if((sshc->readdir_filename = (char *)malloc(PATH_MAX+1)) == NULL) {
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_OUT_OF_MEMORY;
      break;
    }
    if((sshc->readdir_longentry = (char *)malloc(PATH_MAX+1)) == NULL) {
      Curl_safefree(sshc->readdir_filename);
      sshc->readdir_filename = NULL;
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_OUT_OF_MEMORY;
      break;
    }
    state(conn, SSH_SFTP_READDIR);
    break;

  case SSH_SFTP_READDIR:
    sshc->readdir_len = libssh2_sftp_readdir_ex(sshc->sftp_handle,
                                                sshc->readdir_filename,
                                                PATH_MAX,
                                                sshc->readdir_longentry,
                                                PATH_MAX,
                                                &sshc->readdir_attrs);
    if(sshc->readdir_len == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    if(sshc->readdir_len > 0) {
      sshc->readdir_filename[sshc->readdir_len] = '\0';

      if(data->set.ftp_list_only) {
        char *tmpLine;

        tmpLine = aprintf("%s\n", sshc->readdir_filename);
        if(tmpLine == NULL) {
          state(conn, SSH_SFTP_CLOSE);
          sshc->actualcode = CURLE_OUT_OF_MEMORY;
          break;
        }
        result = Curl_client_write(conn, CLIENTWRITE_BODY,
                                   tmpLine, sshc->readdir_len+1);
        Curl_safefree(tmpLine);

        if(result) {
          state(conn, SSH_STOP);
          break;
        }
        /* since this counts what we send to the client, we include the newline
           in this counter */
        data->req.bytecount += sshc->readdir_len+1;

        /* output debug output if that is requested */
        if(data->set.verbose) {
          Curl_debug(data, CURLINFO_DATA_OUT, sshc->readdir_filename,
                     sshc->readdir_len, conn);
        }
      }
      else {
        sshc->readdir_currLen = strlen(sshc->readdir_longentry);
        sshc->readdir_totalLen = 80 + sshc->readdir_currLen;
        sshc->readdir_line = (char *)calloc(sshc->readdir_totalLen, 1);
        if(!sshc->readdir_line) {
          Curl_safefree(sshc->readdir_filename);
          sshc->readdir_filename = NULL;
          Curl_safefree(sshc->readdir_longentry);
          sshc->readdir_longentry = NULL;
          state(conn, SSH_SFTP_CLOSE);
          sshc->actualcode = CURLE_OUT_OF_MEMORY;
          break;
        }

        memcpy(sshc->readdir_line, sshc->readdir_longentry,
               sshc->readdir_currLen);
        if((sshc->readdir_attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) &&
           ((sshc->readdir_attrs.permissions & LIBSSH2_SFTP_S_IFMT) ==
            LIBSSH2_SFTP_S_IFLNK)) {
          sshc->readdir_linkPath = (char *)malloc(PATH_MAX + 1);
          if(sshc->readdir_linkPath == NULL) {
            Curl_safefree(sshc->readdir_filename);
            sshc->readdir_filename = NULL;
            Curl_safefree(sshc->readdir_longentry);
            sshc->readdir_longentry = NULL;
            state(conn, SSH_SFTP_CLOSE);
            sshc->actualcode = CURLE_OUT_OF_MEMORY;
            break;
          }

          snprintf(sshc->readdir_linkPath, PATH_MAX, "%s%s", sftp_scp->path,
                   sshc->readdir_filename);
          state(conn, SSH_SFTP_READDIR_LINK);
          break;
        }
        state(conn, SSH_SFTP_READDIR_BOTTOM);
        break;
      }
    }
    else if(sshc->readdir_len == 0) {
      Curl_safefree(sshc->readdir_filename);
      sshc->readdir_filename = NULL;
      Curl_safefree(sshc->readdir_longentry);
      sshc->readdir_longentry = NULL;
      state(conn, SSH_SFTP_READDIR_DONE);
      break;
    }
    else if(sshc->readdir_len <= 0) {
      err = libssh2_sftp_last_error(sshc->sftp_session);
      sshc->actualcode = sftp_libssh2_error_to_CURLE(err);
      failf(data, "Could not open remote file for reading: %s :: %d",
            sftp_libssh2_strerror(err),
            libssh2_session_last_errno(sshc->ssh_session));
      Curl_safefree(sshc->readdir_filename);
      sshc->readdir_filename = NULL;
      Curl_safefree(sshc->readdir_longentry);
      sshc->readdir_longentry = NULL;
      state(conn, SSH_SFTP_CLOSE);
      break;
    }
    break;

  case SSH_SFTP_READDIR_LINK:
    sshc->readdir_len = libssh2_sftp_readlink(sshc->sftp_session,
                                              sshc->readdir_linkPath,
                                              sshc->readdir_filename,
                                              PATH_MAX);
    if(sshc->readdir_len == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    Curl_safefree(sshc->readdir_linkPath);
    sshc->readdir_linkPath = NULL;
    sshc->readdir_line = realloc(sshc->readdir_line,
                                 sshc->readdir_totalLen + 4 +
                                 sshc->readdir_len);
    if(!sshc->readdir_line) {
      Curl_safefree(sshc->readdir_filename);
      sshc->readdir_filename = NULL;
      Curl_safefree(sshc->readdir_longentry);
      sshc->readdir_longentry = NULL;
      state(conn, SSH_SFTP_CLOSE);
      sshc->actualcode = CURLE_OUT_OF_MEMORY;
      break;
    }

    sshc->readdir_currLen += snprintf(sshc->readdir_line +
                                      sshc->readdir_currLen,
                                      sshc->readdir_totalLen -
                                      sshc->readdir_currLen,
                                      " -> %s",
                                      sshc->readdir_filename);

    state(conn, SSH_SFTP_READDIR_BOTTOM);
    break;

  case SSH_SFTP_READDIR_BOTTOM:
    sshc->readdir_currLen += snprintf(sshc->readdir_line +
                                      sshc->readdir_currLen,
                                      sshc->readdir_totalLen -
                                      sshc->readdir_currLen, "\n");
    result = Curl_client_write(conn, CLIENTWRITE_BODY,
                               sshc->readdir_line,
                               sshc->readdir_currLen);

    if(result == CURLE_OK) {

      /* output debug output if that is requested */
      if(data->set.verbose) {
        Curl_debug(data, CURLINFO_DATA_OUT, sshc->readdir_line,
                   sshc->readdir_currLen, conn);
      }
      data->req.bytecount += sshc->readdir_currLen;
    }
    Curl_safefree(sshc->readdir_line);
    sshc->readdir_line = NULL;
    if(result) {
      state(conn, SSH_STOP);
    }
    else
      state(conn, SSH_SFTP_READDIR);
    break;

  case SSH_SFTP_READDIR_DONE:
    if(libssh2_sftp_closedir(sshc->sftp_handle) ==
       LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    sshc->sftp_handle = NULL;
    Curl_safefree(sshc->readdir_filename);
    sshc->readdir_filename = NULL;
    Curl_safefree(sshc->readdir_longentry);
    sshc->readdir_longentry = NULL;

    /* no data to transfer */
    result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
    state(conn, SSH_STOP);
    break;

  case SSH_SFTP_DOWNLOAD_INIT:
    /*
     * Work on getting the specified file
     */
    sshc->sftp_handle =
      libssh2_sftp_open(sshc->sftp_session, sftp_scp->path,
                        LIBSSH2_FXF_READ, data->set.new_file_perms);
    if(!sshc->sftp_handle) {
      if(libssh2_session_last_errno(sshc->ssh_session) ==
         LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else {
        err = libssh2_sftp_last_error(sshc->sftp_session);
        failf(data, "Could not open remote file for reading: %s",
              sftp_libssh2_strerror(err));
        state(conn, SSH_SFTP_CLOSE);
        sshc->actualcode = sftp_libssh2_error_to_CURLE(err);
        break;
      }
    }
    state(conn, SSH_SFTP_DOWNLOAD_STAT);
    break;

  case SSH_SFTP_DOWNLOAD_STAT:
  {
    LIBSSH2_SFTP_ATTRIBUTES attrs;

    rc = libssh2_sftp_stat(sshc->sftp_session, sftp_scp->path, &attrs);
    if(rc == LIBSSH2_ERROR_EAGAIN) {
      break;
    }
    else if(rc) {
      /*
       * libssh2_sftp_open() didn't return an error, so maybe the server
       * just doesn't support stat()
       */
      data->req.size = -1;
      data->req.maxdownload = -1;
    }
    else {
      data->req.size = attrs.filesize;
      data->req.maxdownload = attrs.filesize;
      Curl_pgrsSetDownloadSize(data, attrs.filesize);
    }

    /* We can resume if we can seek to the resume position */
    if(data->state.resume_from) {
      if(data->state.resume_from< 0) {
        /* We're supposed to download the last abs(from) bytes */
        if((curl_off_t)attrs.filesize < -data->state.resume_from) {
          failf(data, "Offset (%"
                FORMAT_OFF_T ") was beyond file size (%" FORMAT_OFF_T ")",
                data->state.resume_from, attrs.filesize);
          return CURLE_BAD_DOWNLOAD_RESUME;
        }
        /* download from where? */
        data->state.resume_from = attrs.filesize - data->state.resume_from;
      }
      else {
        if((curl_off_t)attrs.filesize < data->state.resume_from) {
          failf(data, "Offset (%" FORMAT_OFF_T
                ") was beyond file size (%" FORMAT_OFF_T ")",
                data->state.resume_from, attrs.filesize);
          return CURLE_BAD_DOWNLOAD_RESUME;
        }
      }
      /* Does a completed file need to be seeked and started or closed ? */
      /* Now store the number of bytes we are expected to download */
      data->req.size = attrs.filesize - data->state.resume_from;
      data->req.maxdownload = attrs.filesize - data->state.resume_from;
      Curl_pgrsSetDownloadSize(data,
                               attrs.filesize - data->state.resume_from);
      libssh2_sftp_seek(sshc->sftp_handle, data->state.resume_from);
    }
  }
  /* Setup the actual download */
  if(data->req.size == 0) {
    /* no data to transfer */
    result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
    infof(data, "File already completely downloaded\n");
    state(conn, SSH_STOP);
    break;
  }
  else {
    result = Curl_setup_transfer(conn, FIRSTSOCKET, data->req.size,
                                 FALSE, NULL, -1, NULL);
  }
  if(result) {
    state(conn, SSH_SFTP_CLOSE);
    sshc->actualcode = result;
  }
  else {
    state(conn, SSH_STOP);
  }
  break;

  case SSH_SFTP_CLOSE:
    if(sshc->sftp_handle) {
      rc = libssh2_sftp_close(sshc->sftp_handle);
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc < 0) {
        infof(data, "Failed to close libssh2 file\n");
      }
      sshc->sftp_handle = NULL;
    }
    Curl_safefree(sftp_scp->path);
    sftp_scp->path = NULL;

    DEBUGF(infof(data, "SFTP DONE done\n"));
#if 0 /* PREV */
    state(conn, SSH_SFTP_SHUTDOWN);
#endif
    state(conn, SSH_STOP);
    result = sshc->actualcode;
    break;

  case SSH_SFTP_SHUTDOWN:
    if(sshc->sftp_session) {
      rc = libssh2_sftp_shutdown(sshc->sftp_session);
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc < 0) {
        infof(data, "Failed to stop libssh2 sftp subsystem\n");
      }
      sshc->sftp_session = NULL;
    }

    Curl_safefree(sshc->homedir);
    sshc->homedir = NULL;

    state(conn, SSH_SESSION_DISCONNECT);
    break;

  case SSH_SCP_TRANS_INIT:
    result = ssh_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
    if(result) {
      sshc->actualcode = result;
      state(conn, SSH_STOP);
      break;
    }

    if(data->set.upload) {
      if(data->set.infilesize < 0) {
        failf(data, "SCP requires a known file size for upload");
        sshc->actualcode = CURLE_UPLOAD_FAILED;
        state(conn, SSH_SCP_CHANNEL_FREE);
        break;
      }
      state(conn, SSH_SCP_UPLOAD_INIT);
    }
    else {
      state(conn, SSH_SCP_DOWNLOAD_INIT);
    }
    break;

  case SSH_SCP_UPLOAD_INIT:
    /*
     * libssh2 requires that the destination path is a full path that
     * includes the destination file and name OR ends in a "/" .  If this is
     * not done the destination file will be named the same name as the last
     * directory in the path.
     */
    sshc->ssh_channel =
      libssh2_scp_send_ex(sshc->ssh_session, sftp_scp->path,
                          data->set.new_file_perms,
                          data->set.infilesize, 0, 0);
    if(!sshc->ssh_channel) {
      if(libssh2_session_last_errno(sshc->ssh_session) ==
         LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else {
        int ssh_err;
        char *err_msg;

        ssh_err = libssh2_session_last_error(sshc->ssh_session,
                                             &err_msg, NULL, 0);
        failf(conn->data, "%s", err_msg);
        state(conn, SSH_SCP_CHANNEL_FREE);
        sshc->actualcode = libssh2_session_error_to_CURLE(ssh_err);
        break;
      }
    }

    /* upload data */
    result = Curl_setup_transfer(conn, -1, data->req.size, FALSE, NULL,
                                 FIRSTSOCKET, NULL);

    if(result) {
      state(conn, SSH_SCP_CHANNEL_FREE);
      sshc->actualcode = result;
    }
    else {
      state(conn, SSH_STOP);
    }
    break;

  case SSH_SCP_DOWNLOAD_INIT:
  {
    /*
     * We must check the remote file; if it is a directory no values will
     * be set in sb
     */
    struct stat sb;
    curl_off_t bytecount;

    /* clear the struct scp recv will fill in */
    memset(&sb, 0, sizeof(struct stat));

    /* get a fresh new channel from the ssh layer */
    sshc->ssh_channel = libssh2_scp_recv(sshc->ssh_session,
                                         sftp_scp->path, &sb);
    if(!sshc->ssh_channel) {
      if(libssh2_session_last_errno(sshc->ssh_session) ==
         LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else {
        int ssh_err;
        char *err_msg;

        ssh_err = libssh2_session_last_error(sshc->ssh_session,
                                             &err_msg, NULL, 0);
        failf(conn->data, "%s", err_msg);
        state(conn, SSH_SCP_CHANNEL_FREE);
        sshc->actualcode = libssh2_session_error_to_CURLE(ssh_err);
        break;
      }
    }

    /* download data */
    bytecount = (curl_off_t)sb.st_size;
    data->req.maxdownload =  (curl_off_t)sb.st_size;
    result = Curl_setup_transfer(conn, FIRSTSOCKET,
                                 bytecount, FALSE, NULL, -1, NULL);

    if(result) {
      state(conn, SSH_SCP_CHANNEL_FREE);
      sshc->actualcode = result;
    }
    else
      state(conn, SSH_STOP);
  }
  break;

  case SSH_SCP_DONE:
    if(data->set.upload)
      state(conn, SSH_SCP_SEND_EOF);
    else
      state(conn, SSH_SCP_CHANNEL_FREE);
    break;

  case SSH_SCP_SEND_EOF:
    if(sshc->ssh_channel) {
      rc = libssh2_channel_send_eof(sshc->ssh_channel);
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc) {
        infof(data, "Failed to send libssh2 channel EOF\n");
      }
    }
    state(conn, SSH_SCP_WAIT_EOF);
    break;

  case SSH_SCP_WAIT_EOF:
    if(sshc->ssh_channel) {
      rc = libssh2_channel_wait_eof(sshc->ssh_channel);
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc) {
        infof(data, "Failed to get channel EOF: %d\n", rc);
      }
    }
    state(conn, SSH_SCP_WAIT_CLOSE);
    break;

  case SSH_SCP_WAIT_CLOSE:
    if(sshc->ssh_channel) {
      rc = libssh2_channel_wait_closed(sshc->ssh_channel);
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc) {
        infof(data, "Channel failed to close: %d\n", rc);
      }
    }
    state(conn, SSH_SCP_CHANNEL_FREE);
    break;

  case SSH_SCP_CHANNEL_FREE:
    if(sshc->ssh_channel) {
      rc = libssh2_channel_free(sshc->ssh_channel);
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc < 0) {
        infof(data, "Failed to free libssh2 scp subsystem\n");
      }
      sshc->ssh_channel = NULL;
    }
    DEBUGF(infof(data, "SCP DONE phase complete\n"));
#if 0 /* PREV */
    state(conn, SSH_SESSION_DISCONNECT);
#endif
    state(conn, SSH_STOP);
    result = sshc->actualcode;
    break;

  case SSH_SESSION_DISCONNECT:
    if(sshc->ssh_session) {
      rc = libssh2_session_disconnect(sshc->ssh_session, "Shutdown");
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc < 0) {
        infof(data, "Failed to disconnect libssh2 session\n");
      }
    }

    Curl_safefree(sshc->homedir);
    sshc->homedir = NULL;

    state(conn, SSH_SESSION_FREE);
    break;

  case SSH_SESSION_FREE:
    if(sshc->ssh_session) {
      rc = libssh2_session_free(sshc->ssh_session);
      if(rc == LIBSSH2_ERROR_EAGAIN) {
        break;
      }
      else if(rc < 0) {
        infof(data, "Failed to free libssh2 session\n");
      }
      sshc->ssh_session = NULL;
    }
    sshc->nextstate = SSH_NO_STATE;
    state(conn, SSH_STOP);
    result = sshc->actualcode;
    break;

  case SSH_QUIT:
    /* fallthrough, just stop! */
  default:
    /* internal error */
    sshc->nextstate = SSH_NO_STATE;
    state(conn, SSH_STOP);
    break;
  }

  return result;
}

/* called repeatedly until done from multi.c */
static CURLcode ssh_multi_statemach(struct connectdata *conn, bool *done)
{
  struct ssh_conn *sshc = &conn->proto.sshc;
  CURLcode result = CURLE_OK;

  result = ssh_statemach_act(conn);
  *done = (bool)(sshc->state == SSH_STOP);

  return result;
}

static CURLcode ssh_easy_statemach(struct connectdata *conn)
{
  struct ssh_conn *sshc = &conn->proto.sshc;
  CURLcode result = CURLE_OK;

  while((sshc->state != SSH_STOP) && !result)
    result = ssh_statemach_act(conn);

  return result;
}

/*
 * SSH setup and connection
 */
static CURLcode ssh_init(struct connectdata *conn)
{
  struct SessionHandle *data = conn->data;
  struct SSHPROTO *ssh;

  conn->proto.sshc.actualcode = CURLE_OK; /* reset error code */

  if(data->state.proto.ssh)
    return CURLE_OK;

  ssh = (struct SSHPROTO *)calloc(sizeof(struct SSHPROTO), 1);
  if(!ssh)
    return CURLE_OUT_OF_MEMORY;

  data->state.proto.ssh = ssh;

  return CURLE_OK;
}

/*
 * Curl_ssh_connect() gets called from Curl_protocol_connect() to allow us to
 * do protocol-specific actions at connect-time.
 */
static CURLcode ssh_connect(struct connectdata *conn, bool *done)
{
#ifdef CURL_LIBSSH2_DEBUG
  curl_socket_t sock;
#endif
  struct ssh_conn *ssh;
  CURLcode result;
  struct SessionHandle *data = conn->data;

  /* We default to persistent connections. We set this already in this connect
     function to make the re-use checks properly be able to check this bit. */
  conn->bits.close = FALSE;