2.2 Message Syntax
Browser messages are transported via the Mailslot Protocol, as specified in section 2.1. The browser message MUST be contained in the data section of the Mailslot message.
Browser messages can be categorized according to the server's role. Each of these lists is complete for the specified, individual role. A machine that assumes multiple roles will use the messages for each of those roles, as described here:
Messages used by nonbrowser servers are the following:
HostAnnouncement (sent)
AnnouncementRequest (received)
Messages used by browser clients are the following:
GetBackupListRequest (sent)
GetBackupListResponse (received)
RequestElection (sent)
Messages used by all browser servers (with subcategories of potential browser server, backup browser servers, local master browser servers, and domain master browser servers) are the following:
RequestElection (sent, received)
AnnouncementRequest (sent)
ResetStateRequest (received)
Messages used by potential browser servers are the following:
All messages used by all browser servers
BecomeBackup (received)
Messages used by backup browser servers are the following:
All messages used by all browser servers
LocalMasterAnnouncement (received)
Messages used by local master browser servers are the following:
All messages used by all browser servers
HostAnnouncement (received)
DomainAnnouncement (sent, received)
BecomeBackup (sent)
GetBackupListRequest (received)
GetBackupListResponse (sent)
LocalMasterAnnouncement (sent)
MasterAnnouncement (sent)
ResetStateRequest (sent, received)
Messages used by domain master browser servers are the following:
All messages used by local master browser servers except MasterAnnouncement (sent)
MasterAnnouncement (received)
More information about how the various browser server messages are used is specified in section 3.
All multibyte fields specified in messages in this section are transmitted in little-endian byte order, unless noted otherwise.
Browser message opcodes
A browser message operation code (opcode) consists of an 8-bit numeric value. The opcode MUST be one of the values listed in the following table.
|
Value |
Meaning |
|---|---|
|
HostAnnouncement 0x01 |
For more information, see section 2.2.1. |
|
AnnouncementRequest 0x02 |
For more information, see section 2.2.2. |
|
RequestElection 0x08 |
For more information, see section 2.2.3. |
|
GetBackupListRequest 0x09 |
For more information, see section 2.2.4. |
|
GetBackupListResponse 0x0A |
For more information, see section 2.2.5. |
|
BecomeBackup 0x0B |
For more information, see section 2.2.6. |
|
DomainAnnouncement 0x0C |
For more information, see section 2.2.7. |
|
MasterAnnouncement 0x0D |
For more information, see section 2.2.8. |
|
ResetStateRequest 0x0E |
For more information, see section 2.2.9. |
|
LocalMasterAnnouncement 0x0F |
For more information, see section 2.2.10. |