/* BEGIN include file "ncp_connection_dcls.incl.pl1" -- */ /* This include file contains declarations for the structures */ /* maintained by the NCP which contain information about Host-Host */ /* connections. Currently, this is the information about sockets, */ /* hosts, and requests-for-connection. */ /* Originally created by D. M. Wells, Summer, 1975. */ /* Modified by B. Greenberg, Spring '78 for new leader support */ /* Modified by C. Hornig, July 1979 for new host number format */ declare 1 socket aligned based, /* information we keep on a per-socket basis */ 2 event_channel fixed binary (71), /* event channel of using process */ 2 overseer_event_channel fixed binary (71), /* event chanel of overseer process */ 2 lock bit (36) aligned, /* lock to prevent simultaneous updating */ 2 process_id bit (36) aligned, /* process id of using process */ 2 overseer_process_id bit (36) aligned, /* process id of overseer process */ 2 bit_allocation fixed binary (32), /* bit allocation outstanding on attached link */ 2 msg_allocation fixed binary (16), /* message allocation outstanding on link */ 2 local_socket unaligned like socket.foreign_socket, /* identification of local socket */ 2 foreign_socket unaligned, /* identification of foreign socket */ 3 host, /* id of this host */ 4 net bit (8), /* network id */ 4 host bit (8), /* port on imp */ 4 imp bit (16), /* imp id */ 3 socket_num bit (32), /* actual socket number */ 3 pad bit (8), 2 rfc_queue fixed binary (17) unaligned, /* RFC table index of next block for this */ /* socket, 0 if queue is empty */ 2 link_number fixed binary (17) unaligned, /* number of link assigned for connection */ 2 host_entry_index fixed binary (17) unaligned, /* index in host table of foreign */ /* host involved in connection */ 2 impdim_index fixed binary (17) unaligned, /* index by which IMPDIM knows about connection */ 2 state bit (6) unaligned, /* finite-state-machine information */ 2 byte_size bit (8) unaligned, /* byte-size of connections */ 2 send_gender bit (1) unaligned, /* on iff this is a transmit socket */ 2 allow_interrupts bit (1) unaligned, /* on iff INS and INR should be signalled to user */ 2 deactivate bit (1) unaligned, /* on iff this socket should be deactivated when */ /* matching network messages are finally received */ 2 allow_rfc_queuing bit (1) unaligned, /* on iff we should allow multiple outstanding */ /* RFC's for this socket */ 2 extra_bits bit (12) unaligned, 2 overseer_validation_level bit (3) unaligned, /* ring of highest overseer control */ 2 validation_level bit (3) unaligned, /* ring of highest operator control */ 2 overseer_lock_id bit (36) aligned, /* lock id of the overseer process */ 2 umodes bit (36) aligned, /* 36 bits that the users can play with */ 2 time_state_changed fixed binary (71), /* time that the socket state last changed */ 2 signal_event_channel fixed binary (71), /* chanel to signal over when get INS or INR */ 2 socket_index bit (36) aligned, /* the handle we gave user for future reference */ 2 history aligned, /* state of socket over recent past history */ 3 num_state_changes fixed binary (11) unaligned, /* small field, so only keep mod */ 3 prev_state (0 : 3) fixed binary (5) unaligned; /* past N states, kept in rotation */ declare 1 host aligned based, /* information we retain about a foreign host */ 2 lock bit (36) aligned, /* lock to prevent simultaneous updating */ 2 rcv_link_index fixed binary (17) unaligned, /* impdim index of read link for control msgs */ 2 xmit_link_index fixed binary (17) unaligned, /* impdim index of write link for control msgs */ 2 read_links_assigned bit (32) unaligned, /* a bit is on iff we have assigned that link */ 2 read_link_padd bit (4) unaligned, 2 xhost_number_pad bit (9) unaligned, 2 host_state bit (6) unaligned, /* stae of communications with this host */ 2 previous_host_state bit (6) unaligned, /* last state of this host */ 2 state_pad bit (15) unaligned, 2 time_state_changed fixed binary (71), /* time when host state last changed */ 2 read_links_used bit (32) unaligned, /* bit is on if link has been used "recently" */ 2 read_link_used_pad bit (4) unaligned, 2 num_connections fixed binary (17) unaligned, /* times we attached links for this host */ 2 hash_index fixed binary (17) unaligned, /* table index of this host entry */ 2 host_number fixed bin (32) aligned, /* host number of this host */ 2 host_number_pad fixed bin (35); declare 1 rcvd_rfc aligned based, /* info about a rcvd Request for Connection */ 2 foreign_socket unaligned like socket.foreign_socket, /* foreign socket in RFC msg */ 2 foreign_hosts_choice fixed binary (17) unaligned, /* link or size that other host chose */ 2 next_entry fixed binary (17) unaligned, /* next RFC entry in queue for socket */ 2 padding (1) fixed binary (35); declare 1 host_address based aligned, /* Form of a host address */ 2 net bit (8) unaligned, /* Netwwork ID */ 2 host bit (8) unaligned, /* Host Port */ 2 imp bit (16) unaligned; /* IMP ID */ /* Duplicated because of PL/I multi-like restriction */ /* END of include file ncp_connection_dcls.incl.pl1 */ */ ----------------------------------------------------------- Historical Background This edition of the Multics software materials and documentation is provided and donated to Massachusetts Institute of Technology by Group Bull including Bull HN Information Systems Inc. as a contribution to computer science knowledge. This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology, Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell Bull Inc., Groupe Bull and Bull HN Information Systems Inc. to the development of this operating system. Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970), renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture for managing computer hardware properly and for executing programs. Many subsequent operating systems incorporated Multics principles. Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. . ----------------------------------------------------------- Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without fee is hereby granted,provided that the below copyright notice and historical background appear in all copies and that both the copyright notice and historical background and this permission notice appear in supporting documentation, and that the names of MIT, HIS, Bull or Bull HN not be used in advertising or publicity pertaining to distribution of the programs without specific prior written permission. Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc. Copyright 2006 by Bull HN Information Systems Inc. Copyright 2006 by Bull SAS All Rights Reserved */