1 files changed, 130 insertions, 0 deletions
diff --git a/libftpconn/xfer.c b/libftpconn/xfer.c
new file mode 100644
index 00000000..07985406
--- /dev/null
+++ b/libftpconn/xfer.c
@@ -0,0 +1,130 @@
+/* Start/stop data channel transfer
+
+   Copyright (C) 1997 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <unistd.h>
+#include <errno.h>
+
+#include <ftpconn.h>
+#include "priv.h"
+
+/* Open a data connection, returning the file descriptor in DATA.  */
+static error_t
+ftp_conn_open_data (struct ftp_conn *conn, int *data)
+{
+  struct sockaddr *addr;
+  error_t err = ftp_conn_get_pasv_addr (conn, &addr);
+
+  if (! err)
+    {
+      int dsock = socket (PF_INET, SOCK_STREAM, 0);
+
+      if (dsock < 0)
+	err = errno;
+      else if (connect (dsock, addr, addr->sa_len) < 0)
+	{
+	  err = errno;
+	  close (dsock);
+	}
+      else
+	*data = dsock;
+
+      free (addr);
+    }
+
+  return err;
+}
+
+/* Start a transfer command CMD/ARG, returning a file descriptor in DATA.
+   POSS_ERRS is a list of errnos to try matching against any resulting error
+   text.  */
+error_t
+ftp_conn_start_transfer (struct ftp_conn *conn,
+			 const char *cmd, const char *arg,
+			 const error_t *poss_errs,
+			 int *data)
+{
+  error_t err = ftp_conn_open_data (conn, data);
+
+  if (! err)
+    {
+      int reply;
+      const char *txt;
+
+      err = ftp_conn_cmd (conn, cmd, arg, &reply, &txt);
+      if (!err && !REPLY_IS_PRELIM (reply))
+	  err = unexpected_reply (conn, reply, txt, poss_errs);
+
+      if (err)
+	close (*data);
+    }
+
+  return err;
+}
+
+/* Wait for the reply signalling the end of a data transfer.  */
+error_t
+ftp_conn_finish_transfer (struct ftp_conn *conn)
+{
+  int reply;
+  error_t err = ftp_conn_get_reply (conn, &reply, 0);
+  if (!err && reply != REPLY_TRANS_OK && reply != REPLY_FCMD_OK)
+    err = unexpected_reply (conn, reply, 0, 0);
+  return err;
+}
+
+/* Start retreiving file NAME over CONN, returning a file descriptor in DATA
+   over which the data can be read.  */
+error_t
+ftp_conn_start_retrieve (struct ftp_conn *conn, const char *name, int *data)
+{
+  if (! name)
+    return EINVAL;
+  return
+    ftp_conn_start_transfer (conn, "retr", name, ftp_conn_poss_file_errs, data);
+}
+
+/* Start retreiving a list of files in NAME over CONN, returning a file
+   descriptor in DATA over which the data can be read.  */
+error_t
+ftp_conn_start_list (struct ftp_conn *conn, const char *name, int *data)
+{
+  return
+    ftp_conn_start_transfer (conn, "nlst", name, ftp_conn_poss_file_errs, data);
+}
+
+/* Start retreiving a directory listing of NAME over CONN, returning a file
+   descriptor in DATA over which the data can be read.  */
+error_t
+ftp_conn_start_dir (struct ftp_conn *conn, const char *name, int *data)
+{
+  return
+    ftp_conn_start_transfer (conn, "list", name, ftp_conn_poss_file_errs, data);
+}
+
+/* Start storing into file NAME over CONN, returning a file descriptor in DATA
+   into which the data can be written.  */
+error_t
+ftp_conn_start_store (struct ftp_conn *conn, const char *name, int *data)
+{
+  if (! name)
+    return EINVAL;
+  return
+    ftp_conn_start_transfer (conn, "stor", name, ftp_conn_poss_file_errs, data);
+}