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Diffstat (limited to 'doc/libnftables-json.adoc')
| -rw-r--r-- | doc/libnftables-json.adoc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/doc/libnftables-json.adoc b/doc/libnftables-json.adoc index 98303b35..ea5fbe81 100644 --- a/doc/libnftables-json.adoc +++ b/doc/libnftables-json.adoc @@ -1288,3 +1288,27 @@ ____ ____ Construct a reference to packet's socket. + +=== OSF +[verse] +____ +*{ "osf": { + "key":* 'OSF_KEY'*, + "ttl":* 'OSF_TTL' +*}}* + +'OSF_KEY' := *"name"* +'OSF_TTL' := *"loose"* | *"skip"* +____ + +Perform OS fingerprinting. This expression is typically used in LHS of a *match* +statement. + +*key*:: + What part of the fingerprint info to match against. At this point, only + the OS name is supported. +*ttl*:: + Define how packet's TTL value is to be matched. This property is + optional. If omitted, TTL value has to match exactly. A value of *loose* + accepts TTL values less than the fingerprint one. A value of *skip* + omits TTL value comparison entirely. |