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Doc: Document bytestring type

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Alexander Zubkov 2023-08-24 18:04:33 +02:00 committed by Ondrej Zajicek
parent cbb43d6ff3
commit 9d8e4b01bc
1 changed files with 25 additions and 6 deletions
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doc/bird.sgml
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@ -838,7 +838,7 @@ agreement").
protocol packets are processed in the local TX queues. This option is
Linux specific. Default value is 7 (highest priority, privileged traffic).
<tag><label id="proto-pass">password "<m/password/" | <m/hex_key/ [ { <m>password options</m> } ] </tag>
<tag><label id="proto-pass">password "<m/password/" | <m/bytestring/ [ { <m>password options</m> } ] </tag>
Specifies a password that can be used by the protocol as a shared secret
key. Password option can be used more times to specify more passwords.
If more passwords are specified, it is a protocol-dependent decision
@ -846,10 +846,8 @@ agreement").
authentication is enabled, authentication can be enabled by separate,
protocol-dependent <cf/authentication/ option.
A password can also be specified as a hexadecimal key. <m/hex_key/ is a
sequence of hexadecimal digit pairs, optionally colon-separated. A key
specified this way must be at least 16 bytes (32 digits) long (although
specific algorithms can impose other restrictions).
A password can be specified as a string or as a sequence of hexadecimal
digit pairs (<ref id="type-bytestring" name="bytestring">).
This option is allowed in BFD, OSPF, RIP, and Babel protocols. BGP has
also <cf/password/ option, but it is slightly different and described
@ -1387,6 +1385,27 @@ in the foot).
!&tilde;/) operators could be used to match a string value against
a shell pattern (represented also as a string).
<tag><label id="type-bytestring">bytestring</tag>
This is a sequences of arbitrary bytes. There are no ways to modify
bytestrings in filters. You can pass them between function, assign
them to variables of type <cf/bytestring/, print such values,
compare bytestings (<cf/=, !=/). Bytestring literals are written
in several ways:
A sequence of hexadecimal digit pairs, optionally colon-separated.
A bytestring specified this way must be at least 16 bytes (32 digits)
long: <cf/01:23:45:67:89:ab:cd:ef:01:23:45:67:89:ab:cd:ef/ or
<cf/0123456789abcdef0123456789abcdef/.
A sequence of hexadecimal digit pairs of any lengh (including zero)
with the <cf/hex:/ prefix. Colon separators can be inserted
arbitrarily between any bytes: <cf/hex:/, <cf/hex:1234/,
<cf/hex:1234:56:78/.
A bytestring can be made from a hex string using <cf/from_hex()/
function. Source strings can use any number of colons, hyphens and
spaces as byte separators: <cf/from_hex(" 1234 56:78 ab-cd-ef ")/.
<tag><label id="type-ip">ip</tag>
This type can hold a single IP address. The IPv4 addresses are stored as
IPv4-Mapped IPv6 addresses so one data type for both of them is used.
@ -4549,7 +4568,7 @@ definitions, prefix definitions and DNS definitions:
options and there is a short variant <cf>dnssl <m/domain/</cf> that just
specifies one DNS search domain.
<tag><label id="radv-custom-option">custom option type <m/number/ value <m/binary/</tag>
<tag><label id="radv-custom-option">custom option type <m/number/ value <m/bytestring/</tag>
Custom option definitions allow to define an arbitrary option to
advertise. You need to specify the option type number and the binary
payload of the option. The length field is calculated automatically.