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1657 lines
48 KiB
C
1657 lines
48 KiB
C
/*
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* Filters: Instructions themselves
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*
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* Copyright 1998 Pavel Machek <pavel@ucw.cz>
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* Copyright 2018 Maria Matejka <mq@jmq.cz>
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* Copyright 2018 CZ.NIC z.s.p.o.
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*
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* The filter code goes through several phases:
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*
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* 1 Parsing
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* Flex- and Bison-generated parser decodes the human-readable data into
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* a struct f_inst tree. This is an infix tree that was interpreted by
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* depth-first search execution in previous versions of the interpreter.
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* All instructions have their constructor: f_new_inst(FI_EXAMPLE, ...)
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* translates into f_new_inst_FI_EXAMPLE(...) and the types are checked in
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* compile time. If the result of the instruction is always the same,
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* it's reduced to FI_CONSTANT directly in constructor. This phase also
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* counts how many instructions are underlying in means of f_line_item
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* fields to know how much we have to allocate in the next phase.
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*
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* 2 Linearize before interpreting
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* The infix tree is always interpreted in the same order. Therefore we
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* sort the instructions one after another into struct f_line. Results
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* and arguments of these instructions are implicitly put on a value
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* stack; e.g. the + operation just takes two arguments from the value
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* stack and puts the result on there.
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*
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* 3 Interpret
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* The given line is put on a custom execution stack. If needed (FI_CALL,
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* FI_SWITCH, FI_AND, FI_OR, FI_CONDITION, ...), another line is put on top
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* of the stack; when that line finishes, the execution continues on the
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* older lines on the stack where it stopped before.
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*
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* 4 Same
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* On config reload, the filters have to be compared whether channel
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* reload is needed or not. The comparison is done by comparing the
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* struct f_line's recursively.
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*
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* The main purpose of this rework was to improve filter performance
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* by making the interpreter non-recursive.
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*
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* The other outcome is concentration of instruction definitions to
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* one place -- right here. You shall define your instruction only here
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* and nowhere else.
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*
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* Beware. This file is interpreted by M4 macros. These macros
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* may be more stupid than you could imagine. If something strange
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* happens after changing this file, compare the results before and
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* after your change (see the Makefile to find out where the results are)
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* and see what really happened.
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*
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* This file is not directly a C source code -> it is a generator input
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* for several C sources; every instruction block gets expanded into many
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* different places.
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*
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* All the arguments are processed literally; if you need an argument including comma,
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* you have to quote it by [[ ... ]]
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*
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* What is the syntax here?
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* m4_dnl INST(FI_NOP, in, out) { enum value, input args, output args
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* m4_dnl ARG(num, type); argument, its id (in data fields) and type accessible by v1, v2, v3
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* m4_dnl ARG_ANY(num); argument with no type check accessible by v1, v2, v3
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* m4_dnl ARG_TYPE(num, type); just declare the type of argument
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* m4_dnl VARARG; variable-length argument list; accessible by vv(i) and whati->varcount
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* m4_dnl LINE(num, out); this argument has to be converted to its own f_line
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* m4_dnl SYMBOL; symbol handed from config
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* m4_dnl STATIC_ATTR; static attribute definition
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* m4_dnl DYNAMIC_ATTR; dynamic attribute definition
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* m4_dnl RTC; route table config
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* m4_dnl ACCESS_RTE; this instruction needs route
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* m4_dnl ACCESS_EATTRS; this instruction needs extended attributes
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*
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* m4_dnl METHOD_CONSTRUCTOR(name); this instruction is in fact a method of the first argument's type; register it with the given name for that type
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*
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* m4_dnl FID_MEMBER( custom instruction member
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* m4_dnl C type, for storage in structs
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* m4_dnl name, how the member is named
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* m4_dnl comparator for same(), if different, this should be TRUE (CAVEAT)
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* m4_dnl dump format string debug -> format string for bvsnprintf
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* m4_dnl dump format args appropriate args
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* m4_dnl )
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*
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* m4_dnl RESULT(type, union-field, value); putting this on value stack
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* m4_dnl RESULT_(type, union-field, value); like RESULT(), but do not declare the type
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* m4_dnl RESULT_VAL(value-struct); pass the struct f_val directly
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* m4_dnl RESULT_TYPE(type); just declare the type of result value
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* m4_dnl RESULT_VOID; return undef
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* m4_dnl }
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*
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* Note that runtime arguments m4_dnl (ARG*, VARARG) must be defined before
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* parse-time arguments m4_dnl (LINE, SYMBOL, ...). During linearization,
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* first ones move position in f_line by linearizing arguments first, while
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* second ones store data to the current position.
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*
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* Also note that the { ... } blocks are not respected by M4 at all.
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* If you get weird unmatched-brace-pair errors, check what it generated and why.
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* What is really considered as one instruction is not the { ... } block
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* after m4_dnl INST() but all the code between them.
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*
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* Other code is just copied into the interpreter part.
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*
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* It's also possible to declare type methods in a short way:
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*
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* m4_dnl METHOD(type, method name, argument count, code)
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* m4_dnl METHOD_R(type, method name, argument count, result type, union-field, value)
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*
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* The filter language uses a simple type system, where values have types
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* (constants T_*) and also terms (instructions) are statically typed. Our
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* static typing is partial (some terms do not declare types of arguments
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* or results), therefore it can detect most but not all type errors and
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* therefore we still have runtime type checks.
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*
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* m4_dnl Types of arguments are declared by macros ARG() and ARG_TYPE(),
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* m4_dnl types of results are declared by RESULT() and RESULT_TYPE().
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* m4_dnl Macros ARG_ANY(), RESULT_() and RESULT_VAL() do not declare types
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* m4_dnl themselves, but can be combined with ARG_TYPE() / RESULT_TYPE().
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*
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* m4_dnl Note that types should be declared only once. If there are
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* m4_dnl multiple RESULT() macros in an instruction definition, they must
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* m4_dnl use the exact same expression for type, or they should be replaced
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* m4_dnl by multiple RESULT_() macros and a common RESULT_TYPE() macro.
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* m4_dnl See e.g. FI_EA_GET or FI_MIN instructions.
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*
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*
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* If you are satisfied with this, you don't need to read the following
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* detailed description of what is really done with the instruction definitions.
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*
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* m4_dnl Now let's look under the cover. The code between each INST()
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* m4_dnl is copied to several places, namely these (numbered by the M4 diversions
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* m4_dnl used in filter/decl.m4):
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*
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* m4_dnl (102) struct f_inst *f_new_inst(FI_EXAMPLE [[ put it here ]])
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* m4_dnl {
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* m4_dnl ... (common code)
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* m4_dnl (103) [[ put it here ]]
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* m4_dnl ...
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* m4_dnl if (all arguments are constant)
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* m4_dnl (108) [[ put it here ]]
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* m4_dnl }
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* m4_dnl For writing directly to constructor argument list, use FID_NEW_ARGS.
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* m4_dnl For computing something in constructor (103), use FID_NEW_BODY.
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* m4_dnl For constant pre-interpretation (108), see below at FID_INTERPRET_BODY.
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*
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* m4_dnl struct f_inst {
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* m4_dnl ... (common fields)
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* m4_dnl union {
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* m4_dnl struct {
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* m4_dnl (101) [[ put it here ]]
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* m4_dnl } i_FI_EXAMPLE;
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* m4_dnl ...
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* m4_dnl };
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* m4_dnl };
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* m4_dnl This structure is returned from constructor.
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* m4_dnl For writing directly to this structure, use FID_STRUCT_IN.
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*
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* m4_dnl linearize(struct f_line *dest, const struct f_inst *what, uint pos) {
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* m4_dnl ...
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* m4_dnl switch (what->fi_code) {
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* m4_dnl case FI_EXAMPLE:
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* m4_dnl (105) [[ put it here ]]
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* m4_dnl break;
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* m4_dnl }
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* m4_dnl }
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* m4_dnl This is called when translating from struct f_inst to struct f_line_item.
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* m4_dnl For accessing your custom instruction data, use following macros:
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* m4_dnl whati -> for accessing (struct f_inst).i_FI_EXAMPLE
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* m4_dnl item -> for accessing (struct f_line)[pos].i_FI_EXAMPLE
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* m4_dnl For writing directly here, use FID_LINEARIZE_BODY.
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*
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* m4_dnl (107) struct f_line_item {
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* m4_dnl ... (common fields)
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* m4_dnl union {
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* m4_dnl struct {
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* m4_dnl (101) [[ put it here ]]
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* m4_dnl } i_FI_EXAMPLE;
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* m4_dnl ...
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* m4_dnl };
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* m4_dnl };
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* m4_dnl The same as FID_STRUCT_IN (101) but for the other structure.
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* m4_dnl This structure is returned from the linearizer (105).
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* m4_dnl For writing directly to this structure, use FID_LINE_IN.
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*
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* m4_dnl f_dump_line_item_FI_EXAMPLE(const struct f_line_item *item, const int indent)
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* m4_dnl {
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* m4_dnl (104) [[ put it here ]]
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* m4_dnl }
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* m4_dnl This code dumps the instruction on debug. Note that the argument
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* m4_dnl is the linearized instruction; if the instruction has arguments,
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* m4_dnl their code has already been linearized and their value is taken
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* m4_dnl from the value stack.
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* m4_dnl For writing directly here, use FID_DUMP_BODY.
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*
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* m4_dnl f_same(...)
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* m4_dnl {
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* m4_dnl switch (f1_->fi_code) {
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* m4_dnl case FI_EXAMPLE:
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* m4_dnl (106) [[ put it here ]]
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* m4_dnl break;
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* m4_dnl }
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* m4_dnl }
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* m4_dnl This code compares the two given instrucions (f1_ and f2_)
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* m4_dnl on reconfigure. For accessing your custom instruction data,
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* m4_dnl use macros f1 and f2.
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* m4_dnl For writing directly here, use FID_SAME_BODY.
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*
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* m4_dnl f_add_lines(...)
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* m4_dnl {
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* m4_dnl switch (what_->fi_code) {
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* m4_dnl case FI_EXAMPLE:
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* m4_dnl (109) [[ put it here ]]
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* m4_dnl break;
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* m4_dnl }
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* m4_dnl }
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* m4_dnl This code adds new filter lines reachable from the instruction
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* m4_dnl to the filter iterator line buffer. This is for instructions
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* m4_dnl that changes conrol flow, like FI_CONDITION or FI_CALL, most
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* m4_dnl instructions do not need to update it. It is used in generic
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* m4_dnl filter iteration code (FILTER_ITERATE*). For accessing your
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* m4_dnl custom instruction data, use macros f1 and f2. For writing
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* m4_dnl directly here, use FID_ITERATE_BODY.
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*
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* m4_dnl interpret(...)
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* m4_dnl {
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* m4_dnl switch (what->fi_code) {
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* m4_dnl case FI_EXAMPLE:
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* m4_dnl (108) [[ put it here ]]
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* m4_dnl break;
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* m4_dnl }
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* m4_dnl }
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* m4_dnl This code executes the instruction. Every pre-defined macro
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* m4_dnl resets the output here. For setting it explicitly,
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* m4_dnl use FID_INTERPRET_BODY.
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* m4_dnl This code is put on two places; one is the interpreter, the other
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* m4_dnl is instruction constructor. If you need to distinguish between
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* m4_dnl these two, use FID_INTERPRET_EXEC or FID_INTERPRET_NEW respectively.
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* m4_dnl To address the difference between interpreter and constructor
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* m4_dnl environments, there are several convenience macros defined:
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* m4_dnl runtime() -> for spitting out runtime error like division by zero
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* m4_dnl RESULT(...) -> declare result; may overwrite arguments
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* m4_dnl v1, v2, v3 -> positional arguments, may be overwritten by RESULT()
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* m4_dnl falloc(size) -> allocate memory from the appropriate linpool
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* m4_dnl fpool -> the current linpool
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* m4_dnl NEVER_CONSTANT-> don't generate pre-interpretation code at all
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* m4_dnl ACCESS_RTE -> check that route is available, also NEVER_CONSTANT
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* m4_dnl ACCESS_EATTRS -> pre-cache the eattrs; use only with ACCESS_RTE
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* m4_dnl f_rta_cow(fs) -> function to call before any change to route should be done
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*
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* m4_dnl If you are stymied, see FI_CALL or FI_CONSTANT or just search for
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* m4_dnl the mentioned macros in this file to see what is happening there in wild.
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*
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*
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* A note about soundness of the type system:
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*
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* A type system is sound when types of expressions are consistent with
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* types of values resulting from evaluation of such expressions. Untyped
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* expressions are ok, but badly typed expressions are not sound. So is
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* the type system of BIRD filtering code sound? There are some points:
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*
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* All cases of (one) m4_dnl RESULT() macro are obviously ok, as the macro
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* both declares a type and returns a value. One have to check instructions
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* that use m4_dnl RESULT_TYPE() macro. There are two issues:
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*
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* FI_AND, FI_OR - second argument is statically checked to be T_BOOL and
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* passed as result without dynamic typecheck, declared to be T_BOOL. If
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* an untyped non-bool expression is used as a second argument, then
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* the mismatched type is returned.
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*
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* FI_VAR_GET - soundness depends on consistency of declared symbol types
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* and stored values. This is maintained when values are stored by
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* FI_VAR_SET, but when they are stored by FI_CALL, only static checking is
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* used, so when an untyped expression returning mismatched value is used
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* as a function argument, then inconsistent value is stored and subsequent
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* FI_VAR_GET would be unsound.
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*
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* Both of these issues are inconsequential, as mismatched values from
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* unsound expressions will be caught by dynamic typechecks like mismatched
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* values from untyped expressions.
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*
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* Also note that FI_CALL is the only expression without properly declared
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* result type.
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*/
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/* Binary operators */
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INST(FI_ADD, 2, 1) {
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ARG(1,T_INT);
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ARG(2,T_INT);
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RESULT(T_INT, i, v1.val.i + v2.val.i);
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}
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INST(FI_SUBTRACT, 2, 1) {
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ARG(1,T_INT);
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ARG(2,T_INT);
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RESULT(T_INT, i, v1.val.i - v2.val.i);
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}
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INST(FI_MULTIPLY, 2, 1) {
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ARG(1,T_INT);
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ARG(2,T_INT);
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RESULT(T_INT, i, v1.val.i * v2.val.i);
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}
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INST(FI_DIVIDE, 2, 1) {
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ARG(1,T_INT);
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ARG(2,T_INT);
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if (v2.val.i == 0) runtime( "Mother told me not to divide by 0" );
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RESULT(T_INT, i, v1.val.i / v2.val.i);
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}
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INST(FI_AND, 1, 1) {
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ARG(1,T_BOOL);
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ARG_TYPE_STATIC(2,T_BOOL);
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RESULT_TYPE(T_BOOL);
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if (v1.val.i)
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LINE(2,1);
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else
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RESULT_VAL(v1);
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}
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INST(FI_OR, 1, 1) {
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ARG(1,T_BOOL);
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ARG_TYPE_STATIC(2,T_BOOL);
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RESULT_TYPE(T_BOOL);
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if (!v1.val.i)
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LINE(2,1);
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else
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RESULT_VAL(v1);
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}
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INST(FI_PAIR_CONSTRUCT, 2, 1) {
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ARG(1,T_INT);
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ARG(2,T_INT);
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uint u1 = v1.val.i;
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uint u2 = v2.val.i;
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if ((u1 > 0xFFFF) || (u2 > 0xFFFF))
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runtime( "Can't operate with value out of bounds in pair constructor" );
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RESULT(T_PAIR, i, (u1 << 16) | u2);
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}
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INST(FI_EC_CONSTRUCT, 2, 1) {
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ARG_ANY(1);
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ARG(2, T_INT);
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FID_MEMBER(enum ec_subtype, ecs, f1->ecs != f2->ecs, "ec subtype %s", ec_subtype_str(item->ecs));
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int ipv4_used;
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u32 key, val;
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if (v1.type == T_INT) {
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ipv4_used = 0; key = v1.val.i;
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}
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else if (v1.type == T_QUAD) {
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ipv4_used = 1; key = v1.val.i;
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}
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/* IP->Quad implicit conversion */
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else if (val_is_ip4(&v1)) {
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ipv4_used = 1; key = ipa_to_u32(v1.val.ip);
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}
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else
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runtime("Argument 1 of EC constructor must be integer or IPv4 address, got 0x%02x", v1.type);
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val = v2.val.i;
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if (ecs == EC_GENERIC)
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RESULT(T_EC, ec, ec_generic(key, val));
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else if (ipv4_used)
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if (val <= 0xFFFF)
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RESULT(T_EC, ec, ec_ip4(ecs, key, val));
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else
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runtime("4-byte value %u can't be used with IP-address key in extended community", val);
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else if (key < 0x10000)
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RESULT(T_EC, ec, ec_as2(ecs, key, val));
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else
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if (val <= 0xFFFF)
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RESULT(T_EC, ec, ec_as4(ecs, key, val));
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else
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runtime("4-byte value %u can't be used with 4-byte ASN in extended community", val);
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}
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INST(FI_LC_CONSTRUCT, 3, 1) {
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ARG(1, T_INT);
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ARG(2, T_INT);
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ARG(3, T_INT);
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RESULT(T_LC, lc, [[(lcomm) { v1.val.i, v2.val.i, v3.val.i }]]);
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}
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INST(FI_PATHMASK_CONSTRUCT, 0, 1) {
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VARARG;
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struct f_path_mask *pm = falloc(sizeof(struct f_path_mask) + whati->varcount * sizeof(struct f_path_mask_item));
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pm->len = whati->varcount;
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for (uint i=0; i<whati->varcount; i++) {
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switch (vv(i).type) {
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case T_PATH_MASK_ITEM:
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if (vv(i).val.pmi.kind == PM_LOOP)
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{
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if (i == 0)
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runtime("Path mask iterator '+' cannot be first");
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/* We want PM_LOOP as prefix operator */
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pm->item[i] = pm->item[i - 1];
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pm->item[i - 1] = vv(i).val.pmi;
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break;
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}
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pm->item[i] = vv(i).val.pmi;
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break;
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case T_INT:
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pm->item[i] = (struct f_path_mask_item) {
|
|
.asn = vv(i).val.i,
|
|
.kind = PM_ASN,
|
|
};
|
|
break;
|
|
|
|
case T_SET:
|
|
if (!path_set_type(vv(i).val.t))
|
|
runtime("Only integer sets allowed in path mask");
|
|
|
|
pm->item[i] = (struct f_path_mask_item) {
|
|
.set = vv(i).val.t,
|
|
.kind = PM_ASN_SET,
|
|
};
|
|
break;
|
|
|
|
default:
|
|
runtime( "Error resolving path mask template: value not an integer" );
|
|
}
|
|
}
|
|
|
|
RESULT(T_PATH_MASK, path_mask, pm);
|
|
}
|
|
|
|
/* Relational operators */
|
|
|
|
INST(FI_NEQ, 2, 1) {
|
|
ARG_ANY(1);
|
|
ARG_ANY(2);
|
|
ARG_PREFER_SAME_TYPE(1, 2);
|
|
RESULT(T_BOOL, i, !val_same(&v1, &v2));
|
|
}
|
|
|
|
INST(FI_EQ, 2, 1) {
|
|
ARG_ANY(1);
|
|
ARG_ANY(2);
|
|
ARG_PREFER_SAME_TYPE(1, 2);
|
|
RESULT(T_BOOL, i, val_same(&v1, &v2));
|
|
}
|
|
|
|
INST(FI_LT, 2, 1) {
|
|
ARG_ANY(1);
|
|
ARG_ANY(2);
|
|
ARG_SAME_TYPE(1, 2);
|
|
|
|
int i = val_compare(&v1, &v2);
|
|
if (i == F_CMP_ERROR)
|
|
runtime( "Can't compare values of incompatible types" );
|
|
RESULT(T_BOOL, i, (i == -1));
|
|
}
|
|
|
|
INST(FI_LTE, 2, 1) {
|
|
ARG_ANY(1);
|
|
ARG_ANY(2);
|
|
ARG_SAME_TYPE(1, 2);
|
|
|
|
int i = val_compare(&v1, &v2);
|
|
if (i == F_CMP_ERROR)
|
|
runtime( "Can't compare values of incompatible types" );
|
|
RESULT(T_BOOL, i, (i != 1));
|
|
}
|
|
|
|
INST(FI_NOT, 1, 1) {
|
|
ARG(1,T_BOOL);
|
|
RESULT(T_BOOL, i, !v1.val.i);
|
|
}
|
|
|
|
INST(FI_MATCH, 2, 1) {
|
|
ARG_ANY(1);
|
|
ARG_ANY(2);
|
|
int i = val_in_range(&v1, &v2);
|
|
if (i == F_CMP_ERROR)
|
|
runtime( "~ applied on unknown type pair" );
|
|
RESULT(T_BOOL, i, !!i);
|
|
}
|
|
|
|
INST(FI_NOT_MATCH, 2, 1) {
|
|
ARG_ANY(1);
|
|
ARG_ANY(2);
|
|
int i = val_in_range(&v1, &v2);
|
|
if (i == F_CMP_ERROR)
|
|
runtime( "!~ applied on unknown type pair" );
|
|
RESULT(T_BOOL, i, !i);
|
|
}
|
|
|
|
INST(FI_DEFINED, 1, 1) {
|
|
ARG_ANY(1);
|
|
RESULT(T_BOOL, i, (v1.type != T_VOID) && !val_is_undefined(v1));
|
|
}
|
|
|
|
METHOD_R(T_NET, type, T_ENUM_NETTYPE, i, v1.val.net->type);
|
|
METHOD_R(T_IP, is_v4, T_BOOL, i, ipa_is_ip4(v1.val.ip));
|
|
|
|
/* Add initialized variable */
|
|
INST(FI_VAR_INIT, 1, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG_ANY(1);
|
|
SYMBOL;
|
|
ARG_TYPE(1, sym->class & 0xff);
|
|
|
|
/* New variable is always the last on stack */
|
|
uint pos = curline.vbase + sym->offset;
|
|
fstk->vstk[pos] = v1;
|
|
fstk->vcnt = pos + 1;
|
|
}
|
|
|
|
/* Add uninitialized variable */
|
|
INST(FI_VAR_INIT0, 0, 0) {
|
|
NEVER_CONSTANT;
|
|
SYMBOL;
|
|
|
|
/* New variable is always the last on stack */
|
|
uint pos = curline.vbase + sym->offset;
|
|
fstk->vstk[pos] = val_empty(sym->class & 0xff);
|
|
fstk->vcnt = pos + 1;
|
|
}
|
|
|
|
/* Set to indirect value prepared in v1 */
|
|
INST(FI_VAR_SET, 1, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG_ANY(1);
|
|
SYMBOL;
|
|
ARG_TYPE(1, sym->class & 0xff);
|
|
|
|
fstk->vstk[curline.vbase + sym->offset] = v1;
|
|
}
|
|
|
|
INST(FI_VAR_GET, 0, 1) {
|
|
SYMBOL;
|
|
NEVER_CONSTANT;
|
|
RESULT_TYPE(sym->class & 0xff);
|
|
RESULT_VAL(fstk->vstk[curline.vbase + sym->offset]);
|
|
}
|
|
|
|
INST(FI_CONSTANT, 0, 1) {
|
|
FID_MEMBER(
|
|
struct f_val,
|
|
val,
|
|
[[ !val_same(&(f1->val), &(f2->val)) ]],
|
|
"value %s",
|
|
val_dump(&(item->val))
|
|
);
|
|
|
|
RESULT_TYPE(val.type);
|
|
RESULT_VAL(val);
|
|
}
|
|
|
|
METHOD_R(T_PATH, empty, T_PATH, ad, &null_adata);
|
|
METHOD_R(T_CLIST, empty, T_CLIST, ad, &null_adata);
|
|
METHOD_R(T_ECLIST, empty, T_ECLIST, ad, &null_adata);
|
|
METHOD_R(T_LCLIST, empty, T_LCLIST, ad, &null_adata);
|
|
|
|
/* Common loop begin instruction, always created by f_for_cycle() */
|
|
INST(FI_FOR_LOOP_START, 0, 3) {
|
|
NEVER_CONSTANT;
|
|
SYMBOL;
|
|
|
|
/* Repeat the instruction which called us */
|
|
ASSERT_DIE(fstk->ecnt > 1);
|
|
prevline.pos--;
|
|
|
|
/* There should be exactly three items on the value stack to be taken care of */
|
|
fstk->vcnt += 3;
|
|
|
|
/* And these should also stay there after we finish for the caller instruction */
|
|
curline.ventry += 3;
|
|
|
|
/* Assert the iterator variable positioning */
|
|
ASSERT_DIE(curline.vbase + sym->offset == fstk->vcnt - 1);
|
|
|
|
/* The result type declaration makes no sense here but is needed */
|
|
RESULT_TYPE(T_VOID);
|
|
}
|
|
|
|
/* Type-specific for_next iterators */
|
|
INST(FI_PATH_FOR_NEXT, 3, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_PATH);
|
|
if (as_path_walk(v1.val.ad, &v2.val.i, &v3.val.i))
|
|
LINE(2,0);
|
|
|
|
METHOD_CONSTRUCTOR("!for_next");
|
|
}
|
|
|
|
INST(FI_CLIST_FOR_NEXT, 3, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_CLIST);
|
|
if (int_set_walk(v1.val.ad, &v2.val.i, &v3.val.i))
|
|
LINE(2,0);
|
|
|
|
METHOD_CONSTRUCTOR("!for_next");
|
|
}
|
|
|
|
INST(FI_ECLIST_FOR_NEXT, 3, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_ECLIST);
|
|
if (ec_set_walk(v1.val.ad, &v2.val.i, &v3.val.ec))
|
|
LINE(2,0);
|
|
|
|
METHOD_CONSTRUCTOR("!for_next");
|
|
}
|
|
|
|
INST(FI_LCLIST_FOR_NEXT, 3, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_LCLIST);
|
|
if (lc_set_walk(v1.val.ad, &v2.val.i, &v3.val.lc))
|
|
LINE(2,0);
|
|
|
|
METHOD_CONSTRUCTOR("!for_next");
|
|
}
|
|
|
|
INST(FI_ROUTES_BLOCK_FOR_NEXT, 3, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_ROUTES_BLOCK);
|
|
if (!v2.type)
|
|
v2 = v1;
|
|
|
|
if (v2.val.rte)
|
|
{
|
|
v3.val.rte = v2.val.rte;
|
|
v2.val.rte = v2.val.rte->next;
|
|
LINE(2,0);
|
|
}
|
|
|
|
METHOD_CONSTRUCTOR("!for_next");
|
|
}
|
|
|
|
INST(FI_CONDITION, 1, 0) {
|
|
ARG(1, T_BOOL);
|
|
if (v1.val.i)
|
|
LINE(2,0);
|
|
else
|
|
LINE(3,0);
|
|
}
|
|
|
|
INST(FI_PRINT, 1, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG_ANY(1);
|
|
|
|
if (!(fs->flags & FF_SILENT))
|
|
val_format(&v1, &fs->buf);
|
|
}
|
|
|
|
INST(FI_FLUSH, 0, 0) {
|
|
NEVER_CONSTANT;
|
|
if (!(fs->flags & FF_SILENT))
|
|
/* After log_commit, the buffer is reset */
|
|
log_commit(*L_INFO, &fs->buf);
|
|
}
|
|
|
|
INST(FI_DIE, 0, 0) {
|
|
NEVER_CONSTANT;
|
|
FID_MEMBER(enum filter_return, fret, f1->fret != f2->fret, "%s", filter_return_str(item->fret));
|
|
|
|
switch (whati->fret) {
|
|
case F_ACCEPT: /* Should take care about turning ACCEPT into MODIFY */
|
|
case F_ERROR:
|
|
case F_REJECT: /* Maybe print complete route along with reason to reject route? */
|
|
return fret; /* We have to return now, no more processing. */
|
|
default:
|
|
bug( "unknown return type: Can't happen");
|
|
}
|
|
}
|
|
|
|
INST(FI_RTA_GET, 1, 1) {
|
|
{
|
|
ACCESS_RTE;
|
|
ARG(1, T_ROUTE);
|
|
STATIC_ATTR;
|
|
|
|
struct rta *rta = v1.val.rte ? v1.val.rte->attrs : (*fs->rte)->attrs;
|
|
|
|
switch (sa.sa_code)
|
|
{
|
|
case SA_FROM: RESULT(sa.f_type, ip, rta->from); break;
|
|
case SA_GW: RESULT(sa.f_type, ip, rta->nh.gw); break;
|
|
case SA_NET: RESULT(sa.f_type, net, (*fs->rte)->net->n.addr); break;
|
|
case SA_PROTO: RESULT(sa.f_type, s, (*fs->rte)->src->proto->name); break;
|
|
case SA_SOURCE: RESULT(sa.f_type, i, rta->source); break;
|
|
case SA_SCOPE: RESULT(sa.f_type, i, rta->scope); break;
|
|
case SA_DEST: RESULT(sa.f_type, i, rta->dest); break;
|
|
case SA_IFNAME: RESULT(sa.f_type, s, rta->nh.iface ? rta->nh.iface->name : ""); break;
|
|
case SA_IFINDEX: RESULT(sa.f_type, i, rta->nh.iface ? rta->nh.iface->index : 0); break;
|
|
case SA_WEIGHT: RESULT(sa.f_type, i, rta->nh.weight + 1); break;
|
|
case SA_PREF: RESULT(sa.f_type, i, rta->pref); break;
|
|
case SA_GW_MPLS: RESULT(sa.f_type, i, rta->nh.labels ? rta->nh.label[0] : MPLS_NULL); break;
|
|
case SA_GW_MPLS_STACK:
|
|
{
|
|
uint len = rta->nh.labels * sizeof(u32);
|
|
struct adata *list = falloc(sizeof(struct adata) + len);
|
|
list->length = len;
|
|
memcpy(list->data, rta->nh.label, len);
|
|
RESULT(sa.f_type, ad, list);
|
|
break;
|
|
}
|
|
|
|
case SA_ONLINK: RESULT(sa.f_type, i, rta->nh.flags & RNF_ONLINK ? 1 : 0); break;
|
|
|
|
default:
|
|
bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code);
|
|
}
|
|
}
|
|
}
|
|
|
|
INST(FI_RTA_SET, 1, 0) {
|
|
ACCESS_RTE;
|
|
ARG_ANY(1);
|
|
STATIC_ATTR;
|
|
ARG_TYPE(1, sa.f_type);
|
|
|
|
f_rta_cow(fs);
|
|
{
|
|
struct rta *rta = (*fs->rte)->attrs;
|
|
|
|
switch (sa.sa_code)
|
|
{
|
|
case SA_FROM:
|
|
rta->from = v1.val.ip;
|
|
break;
|
|
|
|
case SA_GW:
|
|
{
|
|
ip_addr ip = v1.val.ip;
|
|
struct iface *ifa = ipa_is_link_local(ip) || (rta->nh.flags & RNF_ONLINK) ? rta->nh.iface : NULL;
|
|
neighbor *n = neigh_find((*fs->rte)->src->proto, ip, ifa, (rta->nh.flags & RNF_ONLINK) ? NEF_ONLINK : 0);
|
|
if (!n || (n->scope == SCOPE_HOST))
|
|
runtime( "Invalid gw address" );
|
|
|
|
rta->dest = RTD_UNICAST;
|
|
rta->nh.gw = ip;
|
|
rta->nh.iface = n->iface;
|
|
rta->nh.next = NULL;
|
|
rta->hostentry = NULL;
|
|
rta->nh.labels = 0;
|
|
}
|
|
break;
|
|
|
|
case SA_SCOPE:
|
|
rta->scope = v1.val.i;
|
|
break;
|
|
|
|
case SA_DEST:
|
|
{
|
|
int i = v1.val.i;
|
|
if ((i != RTD_BLACKHOLE) && (i != RTD_UNREACHABLE) && (i != RTD_PROHIBIT))
|
|
runtime( "Destination can be changed only to blackhole, unreachable or prohibit" );
|
|
|
|
rta->dest = i;
|
|
rta->nh.gw = IPA_NONE;
|
|
rta->nh.iface = NULL;
|
|
rta->nh.next = NULL;
|
|
rta->hostentry = NULL;
|
|
rta->nh.labels = 0;
|
|
}
|
|
break;
|
|
|
|
case SA_IFNAME:
|
|
{
|
|
struct iface *ifa = if_find_by_name(v1.val.s);
|
|
if (!ifa)
|
|
runtime( "Invalid iface name" );
|
|
|
|
rta->dest = RTD_UNICAST;
|
|
rta->nh.gw = IPA_NONE;
|
|
rta->nh.iface = ifa;
|
|
rta->nh.next = NULL;
|
|
rta->hostentry = NULL;
|
|
rta->nh.labels = 0;
|
|
}
|
|
break;
|
|
|
|
case SA_GW_MPLS:
|
|
{
|
|
if (v1.val.i >= 0x100000)
|
|
runtime( "Invalid MPLS label" );
|
|
|
|
if (v1.val.i != MPLS_NULL)
|
|
{
|
|
rta->nh.label[0] = v1.val.i;
|
|
rta->nh.labels = 1;
|
|
}
|
|
else
|
|
rta->nh.labels = 0;
|
|
|
|
rta->nh.labels_orig = rta->hostentry ? rta->nh.labels : 0;
|
|
}
|
|
break;
|
|
|
|
case SA_GW_MPLS_STACK:
|
|
{
|
|
int len = int_set_get_size(v1.val.ad);
|
|
u32 *l = int_set_get_data(v1.val.ad);
|
|
|
|
if (len > MPLS_MAX_LABEL_STACK)
|
|
runtime("Too many MPLS labels in stack (%d)", len);
|
|
|
|
int i;
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
u32 label = l[i];
|
|
|
|
if (label >= 0x100000)
|
|
runtime("Invalid MPLS label (%u)", label);
|
|
|
|
/* Ignore rest of label stack if implicit-NULL label (3) is set */
|
|
if (label == MPLS_NULL)
|
|
break;
|
|
|
|
rta->nh.label[i] = label;
|
|
}
|
|
|
|
rta->nh.labels = i;
|
|
rta->nh.labels_orig = rta->hostentry ? i : 0;
|
|
}
|
|
break;
|
|
|
|
case SA_WEIGHT:
|
|
{
|
|
int i = v1.val.i;
|
|
if (i < 1 || i > 256)
|
|
runtime( "Setting weight value out of bounds" );
|
|
if (rta->dest != RTD_UNICAST)
|
|
runtime( "Setting weight needs regular nexthop " );
|
|
|
|
/* Set weight on all next hops */
|
|
for (struct nexthop *nh = &rta->nh; nh; nh = nh->next)
|
|
nh->weight = i - 1;
|
|
}
|
|
break;
|
|
|
|
case SA_PREF:
|
|
rta->pref = v1.val.i;
|
|
break;
|
|
|
|
case SA_ONLINK:
|
|
{
|
|
if (v1.val.i)
|
|
rta->nh.flags |= RNF_ONLINK;
|
|
else
|
|
rta->nh.flags &= ~RNF_ONLINK;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code);
|
|
}
|
|
}
|
|
}
|
|
|
|
INST(FI_EA_GET, 1, 1) { /* Access to extended attributes */
|
|
ACCESS_RTE;
|
|
ACCESS_EATTRS;
|
|
ARG(1, T_ROUTE);
|
|
DYNAMIC_ATTR;
|
|
RESULT_TYPE(da.f_type);
|
|
{
|
|
struct ea_list *eal = v1.val.rte ? v1.val.rte->attrs->eattrs : *fs->eattrs;
|
|
eattr *e = ea_find(eal, da.ea_code);
|
|
|
|
if (!e) {
|
|
RESULT_VAL(val_empty(da.f_type));
|
|
break;
|
|
}
|
|
|
|
switch (e->type & EAF_TYPE_MASK) {
|
|
case EAF_TYPE_INT:
|
|
RESULT_(da.f_type, i, e->u.data);
|
|
break;
|
|
case EAF_TYPE_ROUTER_ID:
|
|
RESULT_(T_QUAD, i, e->u.data);
|
|
break;
|
|
case EAF_TYPE_OPAQUE:
|
|
if (da.f_type == T_ENUM_EMPTY)
|
|
RESULT_(T_ENUM_EMPTY, i, 0);
|
|
else
|
|
RESULT_(T_BYTESTRING, ad, e->u.ptr);
|
|
break;
|
|
case EAF_TYPE_IP_ADDRESS:
|
|
RESULT_(T_IP, ip, *((ip_addr *) e->u.ptr->data));
|
|
break;
|
|
case EAF_TYPE_AS_PATH:
|
|
RESULT_(T_PATH, ad, e->u.ptr);
|
|
break;
|
|
case EAF_TYPE_BITFIELD:
|
|
RESULT_(T_BOOL, i, !!(e->u.data & (1u << da.bit)));
|
|
break;
|
|
case EAF_TYPE_INT_SET:
|
|
RESULT_(T_CLIST, ad, e->u.ptr);
|
|
break;
|
|
case EAF_TYPE_EC_SET:
|
|
RESULT_(T_ECLIST, ad, e->u.ptr);
|
|
break;
|
|
case EAF_TYPE_LC_SET:
|
|
RESULT_(T_LCLIST, ad, e->u.ptr);
|
|
break;
|
|
case EAF_TYPE_STRING:
|
|
RESULT_(T_STRING, s, (const char *) e->u.ptr->data);
|
|
break;
|
|
default:
|
|
bug("Unknown dynamic attribute type");
|
|
}
|
|
}
|
|
}
|
|
|
|
INST(FI_EA_SET, 1, 0) {
|
|
ACCESS_RTE;
|
|
ACCESS_EATTRS;
|
|
ARG_ANY(1);
|
|
DYNAMIC_ATTR;
|
|
ARG_TYPE(1, da.f_type);
|
|
|
|
FID_NEW_BODY;
|
|
if (da.f_type == T_ENUM_EMPTY)
|
|
cf_error("Setting opaque attribute is not allowed");
|
|
|
|
FID_INTERPRET_BODY;
|
|
{
|
|
struct ea_list *l = lp_alloc(fs->pool, sizeof(struct ea_list) + sizeof(eattr));
|
|
|
|
l->next = NULL;
|
|
l->flags = EALF_SORTED;
|
|
l->count = 1;
|
|
l->attrs[0].id = da.ea_code;
|
|
l->attrs[0].flags = da.flags;
|
|
l->attrs[0].type = da.type;
|
|
l->attrs[0].originated = 1;
|
|
l->attrs[0].fresh = 1;
|
|
l->attrs[0].undef = 0;
|
|
|
|
switch (da.type) {
|
|
case EAF_TYPE_INT:
|
|
case EAF_TYPE_ROUTER_ID:
|
|
l->attrs[0].u.data = v1.val.i;
|
|
break;
|
|
|
|
case EAF_TYPE_IP_ADDRESS:;
|
|
int len = sizeof(ip_addr);
|
|
struct adata *ad = lp_alloc(fs->pool, sizeof(struct adata) + len);
|
|
ad->length = len;
|
|
(* (ip_addr *) ad->data) = v1.val.ip;
|
|
l->attrs[0].u.ptr = ad;
|
|
break;
|
|
|
|
case EAF_TYPE_OPAQUE:
|
|
case EAF_TYPE_AS_PATH:
|
|
case EAF_TYPE_INT_SET:
|
|
case EAF_TYPE_EC_SET:
|
|
case EAF_TYPE_LC_SET:
|
|
l->attrs[0].u.ptr = v1.val.ad;
|
|
break;
|
|
|
|
case EAF_TYPE_STRING:;
|
|
struct adata *d = lp_alloc_adata(fs->pool, strlen(v1.val.s) + 1);
|
|
memcpy(d->data, v1.val.s, d->length);
|
|
l->attrs[0].u.ptr = d;
|
|
break;
|
|
|
|
case EAF_TYPE_BITFIELD:
|
|
{
|
|
/* First, we have to find the old value */
|
|
eattr *e = ea_find(*fs->eattrs, da.ea_code);
|
|
u32 data = e ? e->u.data : 0;
|
|
|
|
if (v1.val.i)
|
|
l->attrs[0].u.data = data | (1u << da.bit);
|
|
else
|
|
l->attrs[0].u.data = data & ~(1u << da.bit);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
bug("Unknown dynamic attribute type");
|
|
}
|
|
|
|
f_rta_cow(fs);
|
|
l->next = *fs->eattrs;
|
|
*fs->eattrs = l;
|
|
}
|
|
}
|
|
|
|
INST(FI_EA_UNSET, 0, 0) {
|
|
DYNAMIC_ATTR;
|
|
ACCESS_RTE;
|
|
ACCESS_EATTRS;
|
|
|
|
f_rta_cow(fs);
|
|
ea_unset_attr(fs->eattrs, fs->pool, 1, da.ea_code);
|
|
}
|
|
|
|
/* Get length of */
|
|
METHOD_R(T_NET, len, T_INT, i, net_pxlen(v1.val.net));
|
|
METHOD_R(T_PATH, len, T_INT, i, as_path_getlen(v1.val.ad));
|
|
METHOD_R(T_CLIST, len, T_INT, i, int_set_get_size(v1.val.ad));
|
|
METHOD_R(T_ECLIST, len, T_INT, i, ec_set_get_size(v1.val.ad));
|
|
METHOD_R(T_LCLIST, len, T_INT, i, lc_set_get_size(v1.val.ad));
|
|
|
|
INST(FI_NET_SRC, 1, 1) { /* Get src prefix */
|
|
ARG(1, T_NET);
|
|
METHOD_CONSTRUCTOR("src");
|
|
|
|
net_addr_union *net = (void *) v1.val.net;
|
|
net_addr *src = falloc(sizeof(net_addr_ip6));
|
|
const byte *part;
|
|
|
|
switch(v1.val.net->type) {
|
|
case NET_FLOW4:
|
|
part = flow4_get_part(&net->flow4, FLOW_TYPE_SRC_PREFIX);
|
|
if (part)
|
|
net_fill_ip4(src, flow_read_ip4_part(part), flow_read_pxlen(part));
|
|
else
|
|
net_fill_ip4(src, IP4_NONE, 0);
|
|
break;
|
|
|
|
case NET_FLOW6:
|
|
part = flow6_get_part(&net->flow6, FLOW_TYPE_SRC_PREFIX);
|
|
if (part)
|
|
net_fill_ip6(src, flow_read_ip6_part(part), flow_read_pxlen(part));
|
|
else
|
|
net_fill_ip6(src, IP6_NONE, 0);
|
|
break;
|
|
|
|
case NET_IP6_SADR:
|
|
net_fill_ip6(src, net->ip6_sadr.src_prefix, net->ip6_sadr.src_pxlen);
|
|
break;
|
|
|
|
default:
|
|
runtime( "Flow or SADR expected" );
|
|
}
|
|
|
|
RESULT(T_NET, net, src);
|
|
}
|
|
|
|
INST(FI_NET_DST, 1, 1) { /* Get dst prefix */
|
|
ARG(1, T_NET);
|
|
METHOD_CONSTRUCTOR("dst");
|
|
|
|
net_addr_union *net = (void *) v1.val.net;
|
|
net_addr *dst = falloc(sizeof(net_addr_ip6));
|
|
const byte *part;
|
|
|
|
switch(v1.val.net->type) {
|
|
case NET_FLOW4:
|
|
part = flow4_get_part(&net->flow4, FLOW_TYPE_DST_PREFIX);
|
|
if (part)
|
|
net_fill_ip4(dst, flow_read_ip4_part(part), flow_read_pxlen(part));
|
|
else
|
|
net_fill_ip4(dst, IP4_NONE, 0);
|
|
break;
|
|
|
|
case NET_FLOW6:
|
|
part = flow6_get_part(&net->flow6, FLOW_TYPE_DST_PREFIX);
|
|
if (part)
|
|
net_fill_ip6(dst, flow_read_ip6_part(part), flow_read_pxlen(part));
|
|
else
|
|
net_fill_ip6(dst, IP6_NONE, 0);
|
|
break;
|
|
|
|
case NET_IP6_SADR:
|
|
net_fill_ip6(dst, net->ip6_sadr.dst_prefix, net->ip6_sadr.dst_pxlen);
|
|
break;
|
|
|
|
default:
|
|
runtime( "Flow or SADR expected" );
|
|
}
|
|
|
|
RESULT(T_NET, net, dst);
|
|
}
|
|
|
|
/* Get ROA max prefix length */
|
|
METHOD(T_NET, maxlen, 0, [[
|
|
if (!net_is_roa(v1.val.net))
|
|
runtime( "ROA expected" );
|
|
|
|
RESULT(T_INT, i, (v1.val.net->type == NET_ROA4) ?
|
|
((net_addr_roa4 *) v1.val.net)->max_pxlen :
|
|
((net_addr_roa6 *) v1.val.net)->max_pxlen);
|
|
]]);
|
|
|
|
/* Get ROA ASN */
|
|
METHOD(T_NET, asn, 0, [[
|
|
if (!net_is_roa(v1.val.net))
|
|
runtime( "ROA expected" );
|
|
|
|
RESULT(T_INT, i, (v1.val.net->type == NET_ROA4) ?
|
|
((net_addr_roa4 *) v1.val.net)->asn :
|
|
((net_addr_roa6 *) v1.val.net)->asn);
|
|
]]);
|
|
|
|
/* Convert prefix to IP */
|
|
METHOD_R(T_NET, ip, T_IP, ip, net_prefix(v1.val.net));
|
|
|
|
INST(FI_ROUTE_DISTINGUISHER, 1, 1) {
|
|
ARG(1, T_NET);
|
|
METHOD_CONSTRUCTOR("rd");
|
|
if (!net_is_vpn(v1.val.net))
|
|
runtime( "VPN address expected" );
|
|
RESULT(T_RD, ec, net_rd(v1.val.net));
|
|
}
|
|
|
|
/* Get first ASN from AS PATH */
|
|
METHOD_R(T_PATH, first, T_INT, i, ({ u32 as = 0; as_path_get_first(v1.val.ad, &as); as; }));
|
|
|
|
/* Get last ASN from AS PATH */
|
|
METHOD_R(T_PATH, last, T_INT, i, ({ u32 as = 0; as_path_get_last(v1.val.ad, &as); as; }));
|
|
|
|
/* Get last ASN from non-aggregated part of AS PATH */
|
|
METHOD_R(T_PATH, last_nonaggregated, T_INT, i, as_path_get_last_nonaggregated(v1.val.ad));
|
|
|
|
/* Get ASN part from the standard community ASN */
|
|
METHOD_R(T_PAIR, asn, T_INT, i, v1.val.i >> 16);
|
|
|
|
/* Get data part from the standard community */
|
|
METHOD_R(T_PAIR, data, T_INT, i, v1.val.i & 0xFFFF);
|
|
|
|
/* Get ASN part from the large community */
|
|
METHOD_R(T_LC, asn, T_INT, i, v1.val.lc.asn);
|
|
|
|
/* Get data1 part from the large community */
|
|
METHOD_R(T_LC, data1, T_INT, i, v1.val.lc.ldp1);
|
|
|
|
/* Get data2 part from the large community */
|
|
METHOD_R(T_LC, data2, T_INT, i, v1.val.lc.ldp2);
|
|
|
|
/* Get minimum element from clist */
|
|
METHOD_R(T_CLIST, min, T_PAIR, i, ({ u32 val = 0; int_set_min(v1.val.ad, &val); val; }));
|
|
|
|
/* Get maximum element from clist */
|
|
METHOD_R(T_CLIST, max, T_PAIR, i, ({ u32 val = 0; int_set_max(v1.val.ad, &val); val; }));
|
|
|
|
/* Get minimum element from eclist */
|
|
METHOD_R(T_ECLIST, min, T_EC, ec, ({ u64 val = 0; ec_set_min(v1.val.ad, &val); val; }));
|
|
|
|
/* Get maximum element from eclist */
|
|
METHOD_R(T_ECLIST, max, T_EC, ec, ({ u64 val = 0; ec_set_max(v1.val.ad, &val); val; }));
|
|
|
|
/* Get minimum element from lclist */
|
|
METHOD_R(T_LCLIST, min, T_LC, lc, ({ lcomm val = {}; lc_set_min(v1.val.ad, &val); val; }));
|
|
|
|
/* Get maximum element from lclist */
|
|
METHOD_R(T_LCLIST, max, T_LC, lc, ({ lcomm val = {}; lc_set_max(v1.val.ad, &val); val; }));
|
|
|
|
INST(FI_RETURN, 1, 0) {
|
|
NEVER_CONSTANT;
|
|
/* Acquire the return value */
|
|
ARG_ANY(1);
|
|
uint retpos = fstk->vcnt;
|
|
|
|
/* Drop every sub-block including ourselves */
|
|
do fstk->ecnt--;
|
|
while ((fstk->ecnt > 0) && !(fstk->estk[fstk->ecnt].emask & FE_RETURN));
|
|
|
|
/* Now we are at the caller frame; if no such, try to convert to accept/reject. */
|
|
if (!fstk->ecnt)
|
|
{
|
|
if (fstk->vstk[retpos].type == T_BOOL)
|
|
return (fstk->vstk[retpos].val.i) ? F_ACCEPT : F_REJECT;
|
|
else
|
|
runtime("Can't return non-bool from non-function");
|
|
}
|
|
|
|
/* Set the value stack position, overwriting the former implicit void */
|
|
fstk->vcnt = fstk->estk[fstk->ecnt].ventry - 1;
|
|
|
|
/* Copy the return value */
|
|
RESULT_VAL(fstk->vstk[retpos]);
|
|
}
|
|
|
|
INST(FI_CALL, 0, 1) {
|
|
NEVER_CONSTANT;
|
|
VARARG;
|
|
SYMBOL;
|
|
RESULT_TYPE(sym->function->return_type);
|
|
|
|
FID_NEW_BODY()
|
|
ASSERT(sym->class == SYM_FUNCTION);
|
|
|
|
if (whati->varcount != sym->function->args)
|
|
cf_error("Function '%s' expects %u arguments, got %u arguments",
|
|
sym->name, sym->function->args, whati->varcount);
|
|
|
|
/* Typecheck individual arguments */
|
|
struct f_inst *a = fvar;
|
|
struct f_arg *b = sym->function->arg_list;
|
|
for (uint i = 1; a && b; a = a->next, b = b->next, i++)
|
|
{
|
|
enum f_type b_type = b->arg->class & 0xff;
|
|
|
|
if (a->type && (a->type != b_type) && !f_const_promotion(a, b_type))
|
|
cf_error("Argument %u of '%s' must be %s, got %s",
|
|
i, sym->name, f_type_name(b_type), f_type_name(a->type));
|
|
}
|
|
ASSERT(!a && !b);
|
|
|
|
/* Add implicit void slot for the return value */
|
|
struct f_inst *tmp = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_VOID });
|
|
tmp->next = whati->fvar;
|
|
whati->fvar = tmp;
|
|
what->size += tmp->size;
|
|
|
|
/* Mark recursive calls, they have dummy f_line */
|
|
if (!sym->function->len)
|
|
what->flags |= FIF_RECURSIVE;
|
|
|
|
FID_SAME_BODY()
|
|
if (!(f1->sym->flags & SYM_FLAG_SAME) && !(f1_->flags & FIF_RECURSIVE))
|
|
return 0;
|
|
|
|
FID_ITERATE_BODY()
|
|
if (!(what->flags & FIF_RECURSIVE))
|
|
BUFFER_PUSH(fit->lines) = whati->sym->function;
|
|
|
|
FID_INTERPRET_BODY()
|
|
|
|
/* Push the body on stack */
|
|
LINEX(sym->function);
|
|
curline.vbase = curline.ventry;
|
|
curline.emask |= FE_RETURN;
|
|
|
|
/* Arguments on stack */
|
|
fstk->vcnt += sym->function->args;
|
|
|
|
/* Storage for local variables */
|
|
memset(&(fstk->vstk[fstk->vcnt]), 0, sizeof(struct f_val) * sym->function->vars);
|
|
fstk->vcnt += sym->function->vars;
|
|
}
|
|
|
|
INST(FI_DROP_RESULT, 1, 0) {
|
|
NEVER_CONSTANT;
|
|
ARG_ANY(1);
|
|
}
|
|
|
|
INST(FI_SWITCH, 1, 0) {
|
|
ARG_ANY(1);
|
|
|
|
FID_MEMBER(struct f_tree *, tree, [[!same_tree(f1->tree, f2->tree)]], "tree %p", item->tree);
|
|
|
|
FID_LINEARIZE_BODY()
|
|
/* Linearize all branches in switch */
|
|
struct f_inst *last_inst = NULL;
|
|
struct f_line *last_line = NULL;
|
|
for (struct f_tree *t = whati->tree; t; t = t->left)
|
|
{
|
|
if (t->data != last_inst)
|
|
{
|
|
last_inst = t->data;
|
|
last_line = f_linearize(t->data, 0);
|
|
}
|
|
|
|
t->data = last_line;
|
|
}
|
|
|
|
/* Balance the tree */
|
|
item->tree = build_tree(whati->tree);
|
|
|
|
FID_ITERATE_BODY()
|
|
tree_walk(whati->tree, f_add_tree_lines, fit);
|
|
|
|
FID_INTERPRET_BODY()
|
|
/* In parse-time use find_tree_linear(), in runtime use find_tree() */
|
|
const struct f_tree *t = FID_HIC(,find_tree,find_tree_linear)(tree, &v1);
|
|
if (!t) {
|
|
v1.type = T_VOID;
|
|
t = FID_HIC(,find_tree,find_tree_linear)(tree, &v1);
|
|
if (!t) {
|
|
debug( "No else statement?\n");
|
|
FID_HIC(,break,return NULL);
|
|
}
|
|
}
|
|
|
|
LINEX(t->data);
|
|
}
|
|
|
|
INST(FI_IP_MASK, 2, 1) { /* IP.MASK(val) */
|
|
ARG(1, T_IP);
|
|
ARG(2, T_INT);
|
|
METHOD_CONSTRUCTOR("mask");
|
|
RESULT(T_IP, ip, [[ ipa_is_ip4(v1.val.ip) ?
|
|
ipa_from_ip4(ip4_and(ipa_to_ip4(v1.val.ip), ip4_mkmask(v2.val.i))) :
|
|
ipa_from_ip6(ip6_and(ipa_to_ip6(v1.val.ip), ip6_mkmask(v2.val.i))) ]]);
|
|
}
|
|
|
|
INST(FI_PATH_PREPEND, 2, 1) { /* Path prepend */
|
|
ARG(1, T_PATH);
|
|
ARG(2, T_INT);
|
|
METHOD_CONSTRUCTOR("prepend");
|
|
RESULT(T_PATH, ad, [[ as_path_prepend(fpool, v1.val.ad, v2.val.i) ]]);
|
|
}
|
|
|
|
/* Community list add */
|
|
INST(FI_CLIST_ADD_PAIR, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_PAIR);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_CLIST, ad, [[ int_set_add(fpool, v1.val.ad, v2.val.i) ]]);
|
|
}
|
|
|
|
/* Hack for gw_mpls_list */
|
|
INST(FI_CLIST_ADD_INT, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_INT);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_CLIST, ad, [[ int_set_add(fpool, v1.val.ad, v2.val.i) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_ADD_IP, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_IP);
|
|
METHOD_CONSTRUCTOR("add");
|
|
|
|
FID_NEW_BODY();
|
|
/* IP->Quad implicit conversion, must be before FI_CLIST_ADD_QUAD */
|
|
cf_warn("Method add(clist, ip) is deprecated, please use add(clist, quad)");
|
|
|
|
FID_INTERPRET_BODY();
|
|
if (!val_is_ip4(&v2)) runtime("Mismatched IP type");
|
|
RESULT(T_CLIST, ad, [[ int_set_add(fpool, v1.val.ad, ipa_to_u32(v2.val.ip)) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_ADD_QUAD, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_QUAD);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_CLIST, ad, [[ int_set_add(fpool, v1.val.ad, v2.val.i) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_ADD_CLIST, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_CLIST);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_CLIST, ad, [[ int_set_union(fpool, v1.val.ad, v2.val.ad) ]]);
|
|
}
|
|
|
|
INST(FI_ECLIST_ADD_EC, 2, 1) {
|
|
ARG(1, T_ECLIST);
|
|
ARG(2, T_EC);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_ECLIST, ad, [[ ec_set_add(fpool, v1.val.ad, v2.val.ec) ]]);
|
|
}
|
|
|
|
INST(FI_ECLIST_ADD_ECLIST, 2, 1) {
|
|
ARG(1, T_ECLIST);
|
|
ARG(2, T_ECLIST);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_ECLIST, ad, [[ ec_set_union(fpool, v1.val.ad, v2.val.ad) ]]);
|
|
}
|
|
|
|
INST(FI_LCLIST_ADD_LC, 2, 1) {
|
|
ARG(1, T_LCLIST);
|
|
ARG(2, T_LC);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_LCLIST, ad, [[ lc_set_add(fpool, v1.val.ad, v2.val.lc) ]]);
|
|
}
|
|
|
|
INST(FI_LCLIST_ADD_LCLIST, 2, 1) {
|
|
ARG(1, T_LCLIST);
|
|
ARG(2, T_LCLIST);
|
|
METHOD_CONSTRUCTOR("add");
|
|
RESULT(T_LCLIST, ad, [[ lc_set_union(fpool, v1.val.ad, v2.val.ad) ]]);
|
|
}
|
|
|
|
INST(FI_PATH_DELETE_INT, 2, 1) {
|
|
ARG(1, T_PATH);
|
|
ARG(2, T_INT);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_PATH, ad, [[ as_path_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
INST(FI_PATH_DELETE_SET, 2, 1) {
|
|
ARG(1, T_PATH);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
|
|
if (!path_set_type(v2.val.t))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_PATH, ad, [[ as_path_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
/* Community list delete */
|
|
INST(FI_CLIST_DELETE_PAIR, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_PAIR);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_CLIST, ad, [[ int_set_del(fpool, v1.val.ad, v2.val.i) ]]);
|
|
}
|
|
|
|
/* Hack for gw_mpls_list */
|
|
INST(FI_CLIST_DELETE_INT, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_INT);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_CLIST, ad, [[ int_set_del(fpool, v1.val.ad, v2.val.i) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_DELETE_IP, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_IP);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
|
|
FID_NEW_BODY();
|
|
/* IP->Quad implicit conversion, must be before FI_CLIST_DELETE_QUAD */
|
|
cf_warn("Method delete(clist, ip) is deprecated, please use delete(clist, quad)");
|
|
|
|
FID_INTERPRET_BODY();
|
|
if (!val_is_ip4(&v2)) runtime("Mismatched IP type");
|
|
RESULT(T_CLIST, ad, [[ int_set_del(fpool, v1.val.ad, ipa_to_u32(v2.val.ip)) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_DELETE_QUAD, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_QUAD);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_CLIST, ad, [[ int_set_del(fpool, v1.val.ad, v2.val.i) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_DELETE_CLIST, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_CLIST);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_CLIST, ad, [[ clist_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_DELETE_SET, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
|
|
if (!clist_set_type(v2.val.t, &(struct f_val){}))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_CLIST, ad, [[ clist_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
INST(FI_ECLIST_DELETE_EC, 2, 1) {
|
|
ARG(1, T_ECLIST);
|
|
ARG(2, T_EC);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_ECLIST, ad, [[ ec_set_del(fpool, v1.val.ad, v2.val.ec) ]]);
|
|
}
|
|
|
|
INST(FI_ECLIST_DELETE_ECLIST, 2, 1) {
|
|
ARG(1, T_ECLIST);
|
|
ARG(2, T_ECLIST);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_ECLIST, ad, [[ eclist_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
INST(FI_ECLIST_DELETE_SET, 2, 1) {
|
|
ARG(1, T_ECLIST);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
|
|
if (!eclist_set_type(v2.val.t))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_ECLIST, ad, [[ eclist_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
INST(FI_LCLIST_DELETE_LC, 2, 1) {
|
|
ARG(1, T_LCLIST);
|
|
ARG(2, T_LC);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_LCLIST, ad, [[ lc_set_del(fpool, v1.val.ad, v2.val.lc) ]]);
|
|
}
|
|
|
|
INST(FI_LCLIST_DELETE_LCLIST, 2, 1) {
|
|
ARG(1, T_LCLIST);
|
|
ARG(2, T_LCLIST);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
RESULT(T_LCLIST, ad, [[ lclist_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
INST(FI_LCLIST_DELETE_SET, 2, 1) {
|
|
ARG(1, T_LCLIST);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("delete");
|
|
|
|
if (!lclist_set_type(v2.val.t))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_LCLIST, ad, [[ lclist_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
|
}
|
|
|
|
INST(FI_PATH_FILTER_SET, 2, 1) {
|
|
ARG(1, T_PATH);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("filter");
|
|
|
|
if (!path_set_type(v2.val.t))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_PATH, ad, [[ as_path_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_FILTER_CLIST, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_CLIST);
|
|
METHOD_CONSTRUCTOR("filter");
|
|
RESULT(T_CLIST, ad, [[ clist_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
|
}
|
|
|
|
INST(FI_CLIST_FILTER_SET, 2, 1) {
|
|
ARG(1, T_CLIST);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("filter");
|
|
|
|
if (!clist_set_type(v2.val.t, &(struct f_val){}))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_CLIST, ad, [[ clist_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
|
}
|
|
|
|
INST(FI_ECLIST_FILTER_ECLIST, 2, 1) {
|
|
ARG(1, T_ECLIST);
|
|
ARG(2, T_ECLIST);
|
|
METHOD_CONSTRUCTOR("filter");
|
|
RESULT(T_ECLIST, ad, [[ eclist_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
|
}
|
|
|
|
INST(FI_ECLIST_FILTER_SET, 2, 1) {
|
|
ARG(1, T_ECLIST);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("filter");
|
|
|
|
if (!eclist_set_type(v2.val.t))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_ECLIST, ad, [[ eclist_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
|
}
|
|
|
|
INST(FI_LCLIST_FILTER_LCLIST, 2, 1) {
|
|
ARG(1, T_LCLIST);
|
|
ARG(2, T_LCLIST);
|
|
METHOD_CONSTRUCTOR("filter");
|
|
RESULT(T_LCLIST, ad, [[ lclist_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
|
}
|
|
|
|
INST(FI_LCLIST_FILTER_SET, 2, 1) {
|
|
ARG(1, T_LCLIST);
|
|
ARG(2, T_SET);
|
|
METHOD_CONSTRUCTOR("filter");
|
|
|
|
if (!lclist_set_type(v2.val.t))
|
|
runtime("Mismatched set type");
|
|
|
|
RESULT(T_LCLIST, ad, [[ lclist_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
|
}
|
|
|
|
INST(FI_ROA_CHECK_IMPLICIT, 0, 1) { /* ROA Check */
|
|
NEVER_CONSTANT;
|
|
RTC(1);
|
|
struct rtable *table = rtc->table;
|
|
ACCESS_RTE;
|
|
ACCESS_EATTRS;
|
|
const net_addr *net = (*fs->rte)->net->n.addr;
|
|
|
|
/* We ignore temporary attributes, probably not a problem here */
|
|
/* 0x02 is a value of BA_AS_PATH, we don't want to include BGP headers */
|
|
eattr *e = ea_find(*fs->eattrs, EA_CODE(PROTOCOL_BGP, 0x02));
|
|
|
|
if (!e || ((e->type & EAF_TYPE_MASK) != EAF_TYPE_AS_PATH))
|
|
runtime("Missing AS_PATH attribute");
|
|
|
|
u32 as = 0;
|
|
as_path_get_last(e->u.ptr, &as);
|
|
|
|
if (!table)
|
|
runtime("Missing ROA table");
|
|
|
|
if (table->addr_type != NET_ROA4 && table->addr_type != NET_ROA6)
|
|
runtime("Table type must be either ROA4 or ROA6");
|
|
|
|
if (table->addr_type != (net->type == NET_IP4 ? NET_ROA4 : NET_ROA6))
|
|
RESULT(T_ENUM_ROA, i, ROA_UNKNOWN); /* Prefix and table type mismatch */
|
|
else
|
|
RESULT(T_ENUM_ROA, i, [[ net_roa_check(table, net, as) ]]);
|
|
}
|
|
|
|
INST(FI_ROA_CHECK_EXPLICIT, 2, 1) { /* ROA Check */
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_NET);
|
|
ARG(2, T_INT);
|
|
RTC(3);
|
|
struct rtable *table = rtc->table;
|
|
|
|
u32 as = v2.val.i;
|
|
|
|
if (!table)
|
|
runtime("Missing ROA table");
|
|
|
|
if (table->addr_type != NET_ROA4 && table->addr_type != NET_ROA6)
|
|
runtime("Table type must be either ROA4 or ROA6");
|
|
|
|
if (table->addr_type != (v1.val.net->type == NET_IP4 ? NET_ROA4 : NET_ROA6))
|
|
RESULT(T_ENUM_ROA, i, ROA_UNKNOWN); /* Prefix and table type mismatch */
|
|
else
|
|
RESULT(T_ENUM_ROA, i, [[ net_roa_check(table, v1.val.net, as) ]]);
|
|
|
|
}
|
|
|
|
INST(FI_ASPA_CHECK_EXPLICIT, 1, 1) { /* ASPA Check */
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_PATH);
|
|
RTC(2);
|
|
struct rtable *table = rtc->table;
|
|
|
|
if (!table)
|
|
runtime("Missing ASPA table");
|
|
|
|
if (table->addr_type != NET_ASPA)
|
|
runtime("Table type must be ASPA");
|
|
|
|
RESULT(T_ENUM_ASPA, i, [[ aspa_check(table, v1.val.ad) ]]);
|
|
}
|
|
|
|
INST(FI_FROM_HEX, 1, 1) { /* Convert hex text to bytestring */
|
|
ARG(1, T_STRING);
|
|
|
|
int len = bstrhextobin(v1.val.s, NULL);
|
|
if (len < 0)
|
|
runtime("Invalid hex string");
|
|
|
|
struct adata *bs;
|
|
bs = falloc(sizeof(struct adata) + len);
|
|
bs->length = bstrhextobin(v1.val.s, bs->data);
|
|
ASSERT(bs->length == (size_t) len);
|
|
|
|
RESULT(T_BYTESTRING, bs, bs);
|
|
}
|
|
|
|
INST(FI_FORMAT, 1, 1) { /* Format */
|
|
ARG_ANY(1);
|
|
RESULT(T_STRING, s, val_format_str(fpool, &v1));
|
|
}
|
|
|
|
INST(FI_ASSERT, 1, 0) { /* Birdtest Assert */
|
|
NEVER_CONSTANT;
|
|
ARG(1, T_BOOL);
|
|
|
|
FID_MEMBER(char *, s, [[strcmp(f1->s, f2->s)]], "string %s", item->s);
|
|
|
|
ASSERT(s);
|
|
|
|
if (!bt_assert_hook)
|
|
runtime("No bt_assert hook registered, can't assert");
|
|
|
|
bt_assert_hook(v1.val.i, what);
|
|
}
|