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We currently do parsing and evaluation in two seperate stages. This means
that if any error occurs during parsing, we won't evaluate the syntactical
correct commands and detect possible evaluation errors in them.
In order to improve error reporting, change this to evaluate every command
as soon as it is fully parsed.
With this in place, the ruleset can be fully validated and all errors
reported in one step:
tests/error.1:6:23-23: Error: syntax error, unexpected newline
filter input tcp dport
^
tests/error.1:7:24-26: Error: datatype mismatch, expected internet network service, expression has type Internet protocol
filter input tcp dport tcp
~~~~~~~~~ ^^^
tests/error.1:8:24-32: Error: Right hand side of relational expression (==) must be constant
filter input tcp dport tcp dport
~~~~~~~~~~^^^^^^^^^
Signed-off-by: Patrick McHardy <kaber@trash.net>
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Move error recovery to the common_block definition to handle errors
in any block. Queue those errors and abort parsing once a threshold
is reached.
With this in place, we can continue parsing when errors occur and
show all of them to the user at once.
tests/error.1:3:8-8: Error: syntax error, unexpected '{', expecting string
filter {
^
tests/error.1:4:13-13: Error: syntax error, unexpected newline
filter input
^
tests/error.1:5:17-17: Error: syntax error, unexpected newline
filter input tcp
^
tests/error.1:6:23-23: Error: syntax error, unexpected newline
filter input tcp dport
Signed-off-by: Patrick McHardy <kaber@trash.net>
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As a first step towards stand-alone sets, add support for scoping and
binding symbols. This will be used for user-defined constants, as well
as declarations of modifiable (stand-alone) sets once the kernel side
is ready.
Scopes are currently limited to three nesting levels: the global scope,
table block scopes and chain block scopes.
Signed-off-by: Patrick McHardy <kaber@trash.net>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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