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Diffstat (limited to 'libdhcp/notes.md')
| -rw-r--r-- | libdhcp/notes.md | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/libdhcp/notes.md b/libdhcp/notes.md new file mode 100644 index 0000000..ac14ae2 --- /dev/null +++ b/libdhcp/notes.md @@ -0,0 +1,32 @@ +<!-- + libdhcp/notes.md - Description of sbc-harness + + Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com> + SPDX-License-Identifier: AGPL-3.0-or-later +--> + +| <c> | | <c> | +| In the message from the | | ... then the server ... | +| client the ... | | | +| | | | +| and and | | | + +| <c> | <c> | <c> | | <c> | <c> | <c> | +| giaddr | ciaddr | bcast | | | | | +| (relay) | (cur ip) | bit | | verbs | message types | to | +| is | is | is | | | | | +|---------+----------+-------+---+------------+---------------------+-----------------------------| +| nonzero | * | * | | sends | (all) | 'giaddr' BOOTP relay agent | +| | | | | | | | +|---------+----------+-------+---+------------+---------------------+-----------------------------| +| zero | nonzero | * | | unicasts | DHCPOFFER & DHCPACK | 'ciaddr' client | +| | | | | broadcasts | DHCPNACK | 0xffffffff | +|---------+----------+-------+---+------------+---------------------+-----------------------------| +| zero | zero | 1 | | broadcasts | DHCPOFFER & DHCPACK | 0xffffffff | +| | | | | broadcasts | DHCPNACK | 0xffffffff | +|---------+----------+-------+---+------------+---------------------+-----------------------------| +| zero | zero | 0 | | unicasts | DHCPOFFER & DHCPACK | client hw addr and 'yiaddr' | +| | | | | broadcasts | DHCPNACK | 0xffffffff | + +In all cases, when 'giaddr' is zero, the server broadcasts any DHCPNAK +messages to 0xffffffff. |