RFC 80 (rfc80) - Page 2 of 9
Protocols and Data Formats
Alternative Format: Original Text Document
RFC 80 Protocols and Data Formats 1 December 1970
1 4 3 1 1
+-----+---------------------+---------------+-----+-----+
| RTS | US | SERV | 1 | P |
+-----+---------------------+---------------+-----+-----+
over link 1, where P is the receive link.
2. The serving process (SERV) may decide to refuse to the call, in
which case it closes the connection. If it accepts the call,
the serving process completes the connection (via an INIT
system call, hence an STR).
1 3 1 4
+-----+----------------+-----+--------------------+
| STR | SERV | 1 | US |
+-----+----------------+-----+--------------------+
3. When the connection is completed, the user process allocates a
nominal amount of space to the connection, resulting in the NCP
sending:
1 1 4
+-----+-----+--------------------+
| ALL | P | SPACE |
+-----+-----+--------------------+
where SPACE is the amount.
4. The serving process then selects the socket pair it wishes to
assign this user. It sends exactly an even 32 bit number over
the connection. This even 32 bit number (SS) is the receive
socket in the serving HOST. This socket and the next higher
numbered socket are reserved for the using process.
5. It then closes the connection. The serving NCP sends (step 4):
4
+---------------------+
| SS |
+---------------------+
on link P, and (step 5):
Harslem, et. al.