RFC 1770 (rfc1770) - Page 2 of 6
IPv4 Option for Sender Directed Multi-Destination Delivery
Alternative Format: Original Text Document
RFC 1770 Selective Directed Broadcast Protocol March 1995
emerging internet standards, will be embraced by the internet
community and become an integal part of the IP family of protocols
and be incorporated in commercial IP software products.
SDBM Format
The SDBM provides the ability for an application to explicitly list a
set of intended IP destinations. This capability will be implemented
as an option in the IP layer, as shown in Figure 1. This option field
is variable in length, up to a maximum of 40 octets due to the
limitation of the HLEN field as specified in STD 5, RFC 791
(Reference 2). Under this option 38 of the 40 octets would be used to
contain the 2 octet control field and a maximum of 9 IP addresses.
1 8 16 31
***************************************************
| | | |
| | | |
| TYPE | LENGTH | IP ADDRESS 1 |
| | | |
| | | |
|*************************************************|
| | |
| IP ADDRESS 1(Cont) | IP ADDRESS 2 |
| | |
| | |
|*************************************************|
| | |
| IP ADDRESS 2(Cont) | .......... |
| | |
| | |
|*************************************************|
| | |
| | |
| .......... | IP ADDRESS N |
| | |
| | |
|*************************************************|
| | |
| IP ADDRESS N(Cont) | UNUSED |
| | |
| | |
***************************************************
Figure 1 IP Option Field Layout
Graff
