Phases

Phases to transfer a file

** [ Source ]    &   [Destination]    [Phase]
**
**    CWD        &   CWD [ MKD [ CWD ] ]  1 | Go to dir, create if needed. <ref>This means that creation of destination directories only occur once we try to transfer a valid file. If there are no files to transfer, the destination directory is not made. (However, if dskipempty is set to NO we should create it. Currently not implemented)</ref>
**  CCSN/SSCN    &    [CCSN/SSCN]         2 | SSL, send to one of them.
**   [PROT]      &      [PROT]            3 | SSL, go privacy, or not.
**    TYPE       &       TYPE             4 | Set Binary, if needed.
**               &       SIZE             5 | Exists? Size? Resume? Res-Last?
**   [PRET]      &      [PRET]            6 | If pre-transfer
**   [PASV]      &      [PASV]            7 | Send pasv to one site
**   [PORT]      &      [PORT]            8 | Send port to the other.
**   [REST]      &      [REST]            9 | If resume, send restart point
**               &       STOR            10 | Attempt stor
**   [RETR]      &                       11 | Attempt retr
**    NOOP       &       NOOP            12 | Stop idle out until we are rdy