Crocodile protocols

I. Alligator side:

Nº	Receive or send	Data type	Data label	Data value	Action after send or recieve and notes
1	out	Byte	Welcome	'+'	-
2	in	String¹	Login	-	-
3	in	String	Password	-	-
4	out	Byte	Result	see below	-
4	out	Byte	Result	'!'	Go ahead.
4	out	Byte	Result	'^'	Login failed, terminate conversation.
5	in	Byte	Action	-	Conversation depends on this byte.
5	in	Byte	Action	'a'	Add user.
5.1	in	String	User	-	-
5.2	in	String	Gecos	-	-
5.3	in	Integer	Time	-	-
5.4	in	Integer	Traffic	-	-
5.5	in	Integer	Drop flg	-	-
5.6	in	Integer	Delete flg	-	-
5.7	out	Byte	Result	see below	Terminate after.
5.7	out	Byte	Result	'+'	User added.
5.7	out	Byte	Result	'-'	Duplicate name.
5.7	out	Byte	Result	'*'	User not added. Error.
5.7	out	Byte	Result	'~'	No rights to do this.
5	in	Byte	Action	's'	Set user.
5.1	in	String	User	-	-
5.2	in	Integer	Time	-	-
5.3	in	Integer	Traffic	-	-
5.4	in	Integer	Drop flg	-	-
5.5	in	Integer	Delete flg	-	-
5.6	out	Byte	Result	see below	Terminate.
5.6	out	Byte	Result	'+'	User set.
5.6	out	Byte	Result	'-'	No such user.
5.6	out	Byte	Result	'*'	User not set. Error.
5.6	out	Byte	Result	'~'	No rights to do this.
5	in	Byte	Action	'g'	Get user
5.1	in	String	User	-	-
5.2	out	Byte	Result	see below	-
5.2	out	Byte	Result	'+'	OK.
5.2	out	Byte	Result	'-'	No such user.
5.2	out	Byte	Result	'*'	Error.
5.2	out	Byte	Result	'~'	No rights to do this.
5.3	out	Integer	Time	-	-
5.4	out	Integer	Traffic	-	-
5.5	out	Integer	Flags	-	-
5.6	out	Integer	Time	-	Current time.
5.7	out	Integer	Traffic	-	Current traffic.
5	in	Byte	Action	'd'	Delete user.
5.1	in	String	User	-	-
5.2	out	Byte	Result	see below	Terminate after.
5.2	out	Byte	Result	'+'	User deleted.
5.2	out	Byte	Result	'-'	No such user.
5.2	out	Byte	Result	'*'	User not deleted. Error.
5.2	out	Byte	Result	'~'	No rights to do this.
5	in	Byte	Action	'i'	Log in.
5.1	in	String	Device	-	-
5.2	in	String	Host	-	-
5.3	out	Byte	Result	see below	Terminate.
5.3	out	Byte	Result	'+'	User logged on.
5.3	out	Byte	Result	'-'	No account.
5.3	out	Byte	Result	'*'	Error.
5.3	out	Byte	Result	'~'	Account expired.
5.3	out	Byte	Result	'.'	Already logged on.
5	in	Byte	Action	'{'	Trusted² log in.
5.1	in	String	Device	-	-
5.2	in	String	Host	-	-
5.3	out	Byte	Result	see below	Terminate.
5.3	out	Byte	Result	'+'	User logged on.
5.3	out	Byte	Result	'-'	No account.
5.3	out	Byte	Result	'*'	Error.
5.3	out	Byte	Result	'~'	Account expired.
5.3	out	Byte	Result	'.'	Already logged on.
5	in	Byte	Action	'o'	Log out.
5.1	in	String	Device	-	-
5.2	in	String	Host	-	-
5.3	out	Byte	Result	see below	Terminate.
5.3	out	Byte	Result	'+'	User logged out.
5.3	out	Byte	Result	'-'	User not logged.
5.3	out	Byte	Result	'*'	Error.
5	in	Byte	Action	'}'	Trusted log out.
5.1	in	String	Device	-	-
5.2	in	String	Host	-	-
5.3	out	Byte	Result	see below	Terminate.
5.3	out	Byte	Result	'+'	User logged out.
5.3	out	Byte	Result	'-'	User not logged.
5.3	out	Byte	Result	'*'	Error.
5	in	Byte	Action	'u'	Dump users.
5.1	in	String	User³	-	-
5.2	out	Integer	Pages	-	0 if no such user.
5.3	in	Integer	Page	-	-
5.4	out	String	User name	-	Empty string if no more users or error. After empty string - terminate.
5.5	out	Integer	Time	-	-
5.6	out	Integer	Traffic	-	-
5.7	out	Integer	Flags	-	-
5.8	in	Byte	Action	'>'	Next record. Loop to 5.4.
5	in	Byte	Action	'c'	Dump current.
5.1	out	String	User name	-	Empty string if no more users or error. After empty string - terminate.
5.2	out	String	Device	-	-
5.3	out	String	Host	-	-
5.4	out	Integer	Start time	-	-
5.5	out	Integer	Final time	-	-
5.6	out	Integer	Final < tr	-	-
5.7	out	Integer	Final > rt	-	-
5.8	in	Byte	Action	'>'	Next record. Loop to 5.1.
5	in	Byte	Action	'h'	Dump hrono.
5.1	in	String	User**	-	-
5.2	in	Integer	Start time	-	-1 if no matter.
5.3	in	Integer	Final time	-	-1 if no matter.
5.4	out	String	User name	-	Empty string if no more users or error. After empty string - terminate.
5.5	out	String	Device	-	-
5.6	out	String	Host	-	-
5.7	out	Integer	Start time	-	-
5.8	out	Integer	Final time	-	-
5.9	out	Integer	Login time	-	-
5.10	out	Integer	< traffic	-	-
5.11	out	Integer	> traffic	-	-
5.12	out	Integer	traffic	-	-
5.13	in	Byte	Action	'>'	Next record. Loop to 5.4.
6	out	Byte	Result	see below	-
6	out	Byte	Result	'#'	Good bye, terminate.
6	out	Byte	Result	'?'	Invalid action, terminate.

I. Mugger side:

Nº	Receive or send	Data type	Data label	Data value	Action after send or recieve and notes
1	out	Byte	Welcome	'+'	-
2	in	String	Login	-	-
3	in	String	Device	-	-
4	in	String	Host	-	-
5	out	Byte	Result	see below	Terminate.
5	out	Byte	Result	'+'	User killed.
5	out	Byte	Result	'-'	No such user.
5	out	Byte	Result	'*'	User not killed. Error.

¹ NULL Terminated string.
² Password for trusted login is "@login@" and for trusted logout - "@logout".
³ Empty string means all users.