typedef struct SilcSFTPStruct *SilcSFTP;
This context is the actual SFTP client and SFTP server, and is allocated by silc_sftp_client_start or silc_sftp_server_start and given as argument usually to all silc_sftp_* functions. It is freed by the silc_sftp_client_shutdown or silc_sftp_server_shutdown functions.