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set first bit of EESP packet before to 1 #5

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Merged
klassert merged 1 commit into from
Jan 21, 2025
Merged

set first bit of EESP packet before to 1 #5

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21 changes: 10 additions & 11 deletions eesp.org
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Original file line number Diff line number Diff line change
Expand Up @@ -207,15 +207,15 @@ The fixed portion of the base header is defined as follows.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Version | Opt Len | Flags | Session ID |
|1|Version| Opt Len | Flags | Session ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SPI |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#+end_src

- Version :: 5 bits: MUST be set to 1 and checked by the receiver.
Version 0 is is reserved to avoid a conflict with the Non-ESP Marker of IKE
packets in the case of UDP encapsulation.
- ESP compaitability :: 1 bit : set to 1 for compaitability with
ESP-in-UDP. ESP-in-UDP SA MAY have this bit 0, the most significant
bit of SPI is 0.
- Version :: 4 bits: Validated by the receiver.
If the version is different than an expected version
number (e.g., negotiated via the control channel), then the packet
MUST be dropped by the receiver. Future modifications to the EESP
Expand Down Expand Up @@ -549,7 +549,7 @@ other modes of operation.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Version | Flags | Opt Len | Session ID |
|1|Version| Flags | Opt Len | Session ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SPI |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Expand Down Expand Up @@ -584,7 +584,7 @@ other modes of operation.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Version | Flags | Opt Len | Session ID |
|1|Version| Flags | Opt Len | Session ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SPI |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Expand Down Expand Up @@ -1945,10 +1945,9 @@ The initial content for this registry is as follows:
#+begin_src
Value EESP Vesion Reference
------- ------------------------------ ---------------
0 Reserved [this document]
1 V1 [this document]
2-29 Unassigned [this document]
30-31 Private [this document]
0 V0 [this document]
1-13 Unassigned [this document]
13-15 Private Use [this document]
#+end_src


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