mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-18 17:18:42 +00:00
Merge commit '2e5bfeb73ac25e236a24b6c1a88d0f2221ca303f' into thread-next
This commit is contained in:
Maria Matejka
commit
68a2c9d4c9
@ -577,6 +577,8 @@ check_eof(void)
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return 0;
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}
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static inline void cf_swap_soft_scope(void);
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static struct symbol *
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cf_new_symbol(const byte *c)
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{
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@ -586,6 +588,8 @@ cf_new_symbol(const byte *c)
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if (l > SYM_MAX_LEN)
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cf_error("Symbol too long");
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cf_swap_soft_scope();
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s = cfg_allocz(sizeof(struct symbol) + l + 1);
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*s = (struct symbol) { .scope = conf_this_scope, .class = SYM_VOID, };
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strcpy(s->name, c);
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@ -676,8 +680,8 @@ cf_localize_symbol(struct symbol *sym)
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return sym;
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/* If the scope is the current, it is already defined in this scope. */
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if (sym->scope == conf_this_scope)
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cf_error("Symbol already defined");
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if (cf_symbol_is_local(sym))
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cf_error("Symbol '%s' already defined", sym->name);
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/* Not allocated here yet, doing it now. */
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return cf_new_symbol(sym->name);
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@ -839,12 +843,60 @@ cf_push_scope(struct symbol *sym)
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void
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cf_pop_scope(void)
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{
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ASSERT(!conf_this_scope->soft_scopes);
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conf_this_scope->active = 0;
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conf_this_scope = conf_this_scope->next;
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ASSERT(conf_this_scope);
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}
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/**
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* cf_push_soft_scope - enter new soft scope
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*
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* If we want to enter a new anonymous scope that most likely will not contain
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* any symbols, we can use cf_push_soft_scope() insteas of cf_push_scope().
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* Such scope will be converted to a regular scope on first use.
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*/
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void
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cf_push_soft_scope(void)
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{
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if (conf_this_scope->soft_scopes < 0xfe)
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conf_this_scope->soft_scopes++;
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else
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cf_push_scope(NULL);
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}
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/**
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* cf_pop_soft_scope - leave a soft scope
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*
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* Leave a soft scope entered by cf_push_soft_scope().
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*/
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void
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cf_pop_soft_scope(void)
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{
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if (conf_this_scope->soft_scopes)
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conf_this_scope->soft_scopes--;
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else
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cf_pop_scope();
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}
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/**
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* cf_swap_soft_scope - convert soft scope to regular scope
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*
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* Soft scopes cannot hold symbols, so they must be converted to regular scopes
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* on first use. It is done automatically by cf_new_symbol().
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*/
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static inline void
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cf_swap_soft_scope(void)
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{
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if (conf_this_scope->soft_scopes)
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{
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conf_this_scope->soft_scopes--;
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cf_push_scope(NULL);
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}
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}
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/**
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* cf_symbol_class_name - get name of a symbol class
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* @sym: symbol
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@ -136,7 +136,8 @@ struct sym_scope {
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HASH(struct symbol) hash; /* Local symbol hash */
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uint slots; /* Variable slots */
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int active; /* Currently entered */
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byte active; /* Currently entered */
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byte soft_scopes; /* Number of soft scopes above */
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};
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extern struct sym_scope *global_root_scope;
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@ -202,6 +203,9 @@ struct symbol *cf_get_symbol(const byte *c);
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struct symbol *cf_default_name(char *template, int *counter);
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struct symbol *cf_localize_symbol(struct symbol *sym);
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static inline int cf_symbol_is_local(struct symbol *sym)
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{ return (sym->scope == conf_this_scope) && !conf_this_scope->soft_scopes; }
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/**
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* cf_define_symbol - define meaning of a symbol
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* @sym: symbol to be defined
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@ -225,6 +229,9 @@ struct symbol *cf_localize_symbol(struct symbol *sym);
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void cf_push_scope(struct symbol *);
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void cf_pop_scope(void);
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void cf_push_soft_scope(void);
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void cf_pop_soft_scope(void);
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char *cf_symbol_class_name(struct symbol *sym);
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/* Parser */
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@ -76,6 +76,7 @@ CF_DECLS
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struct f_attr_bit fab;
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struct f_lval flv;
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struct f_line *fl;
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struct f_arg *fa;
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const struct filter *f;
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struct f_tree *e;
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struct f_trie *trie;
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@ -154,14 +155,14 @@ conf: definition ;
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definition:
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DEFINE symbol '=' term ';' {
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struct f_val val;
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if (f_eval(f_linearize($4), &val) > F_RETURN) cf_error("Runtime error");
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if (f_eval(f_linearize($4, 1), &val) > F_RETURN) cf_error("Runtime error");
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cf_define_symbol($2, SYM_CONSTANT | val.type, val, lp_val_copy(cfg_mem, &val));
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}
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;
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expr:
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NUM
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| '(' term ')' { $$ = f_eval_int(f_linearize($2)); }
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| '(' term ')' { $$ = f_eval_int(f_linearize($2, 1)); }
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| symbol_known {
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if ($1->class != (SYM_CONSTANT | T_INT)) cf_error("Number constant expected");
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$$ = SYM_VAL($1).i; }
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@ -1262,8 +1262,8 @@ this:
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<code>
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filter not_too_far
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int var;
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{
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int var;
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if defined( rip_metric ) then
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var = rip_metric;
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else {
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@ -1292,9 +1292,9 @@ local variables. Recursion is not allowed. Function definitions look like this:
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<code>
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function name ()
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int local_variable;
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{
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local_variable = 5;
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int local_variable;
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int another_variable = 5;
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}
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function with_parameters (int parameter)
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@ -1303,16 +1303,19 @@ function with_parameters (int parameter)
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}
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</code>
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<p>Unlike in C, variables are declared after the <cf/function/ line, but before
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the first <cf/{/. You can't declare variables in nested blocks. Functions are
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called like in C: <cf>name(); with_parameters(5);</cf>. Function may return
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values using the <cf>return <m/[expr]/</cf> command. Returning a value exits
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from current function (this is similar to C).
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<p>Like in C programming language, variables are declared inside function body,
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either at the beginning, or mixed with other statements. Declarations may
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contain initialization. You can also declare variables in nested blocks, such
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variables have scope restricted to such block. There is a deprecated syntax to
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declare variables after the <cf/function/ line, but before the first <cf/{/.
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Functions are called like in C: <cf>name(); with_parameters(5);</cf>. Function
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||||
may return values using the <cf>return <m/[expr]/</cf> command. Returning a
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value exits from current function (this is similar to C).
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<p>Filters are defined in a way similar to functions except they can't have
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<p>Filters are defined in a way similar to functions except they cannot have
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explicit parameters. They get a route table entry as an implicit parameter, it
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is also passed automatically to any functions called. The filter must terminate
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with either <cf/accept/ or <cf/reject/ statement. If there's a runtime error in
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with either <cf/accept/ or <cf/reject/ statement. If there is a runtime error in
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||||
filter, the route is rejected.
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||||
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||||
<p>A nice trick to debug filters is to use <cf>show route filter <m/name/</cf>
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||||
@ -1682,7 +1685,8 @@ prefix and an ASN as arguments.
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<sect>Control structures
|
||||
<label id="control-structures">
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||||
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||||
<p>Filters support two control structures: conditions and case switches.
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||||
<p>Filters support several control structures: conditions, for loops and case
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||||
switches.
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<p>Syntax of a condition is: <cf>if <M>boolean expression</M> then <m/commandT/;
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else <m/commandF/;</cf> and you can use <cf>{ <m/command1/; <m/command2/;
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@ -1690,6 +1694,14 @@ else <m/commandF/;</cf> and you can use <cf>{ <m/command1/; <m/command2/;
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omitted. If the <cf><m>boolean expression</m></cf> is true, <m/commandT/ is
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executed, otherwise <m/commandF/ is executed.
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<p>For loops allow to iterate over elements in compound data like BGP paths or
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community lists. The syntax is: <cf>for [ <m/type/ ] <m/variable/ in <m/expr/
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do <m/command/;</cf> and you can also use compound command like in conditions.
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The expression is evaluated to a compound data, then for each element from such
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data the command is executed with the item assigned to the variable. A variable
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may be an existing one (when just name is used) or a locally defined (when type
|
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and name is used). In both cases, it must have the same type as elements.
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||||
|
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<p>The <cf>case</cf> is similar to case from Pascal. Syntax is <cf>case
|
||||
<m/expr/ { else: | <m/num_or_prefix [ .. num_or_prefix]/: <m/statement/ ; [
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... ] }</cf>. The expression after <cf>case</cf> can be of any type which can be
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@ -1702,16 +1714,21 @@ neither of the <cf/:/ clauses, the statements after <cf/else:/ are executed.
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<p>Here is example that uses <cf/if/ and <cf/case/ structures:
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<code>
|
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if 1234 = i then printn "."; else {
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print "not 1234";
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print "You need {} around multiple commands";
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}
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for int asn in bgp_path do {
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printn "ASN: ", asn;
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if asn < 65536 then print " (2B)"; else print " (4B)";
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}
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case arg1 {
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2: print "two"; print "I can do more commands without {}";
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3 .. 5: print "three to five";
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else: print "something else";
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}
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|
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if 1234 = i then printn "."; else {
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print "not 1234";
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print "You need {} around multiple commands";
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}
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</code>
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170
filter/config.Y
170
filter/config.Y
@ -32,6 +32,36 @@ static inline u32 pair_b(u32 p) { return p & 0xFFFF; }
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f_new_inst(FI_EA_SET, f_new_inst(fi_code, f_new_inst(FI_DEFAULT, f_new_inst(FI_EA_GET, da), f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_INT, .val.i = def })), arg), da)
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|
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|
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static int
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f_new_var(struct sym_scope *s)
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{
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/*
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* - A variable is an offset on vstack from vbase.
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* - Vbase is set on filter start / function call.
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* - Scopes contain anonymous scopes (blocks) inside filter/function scope
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* - Each scope knows number of vars in that scope
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* - Offset is therefore a sum of 'slots' up to named scope
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* - New variables are added on top of vstk, so intermediate values cannot
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* be there during FI_VAR_INIT. I.e. no 'var' inside 'term'.
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* - Also, each f_line must always have its scope, otherwise a variable may
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* be defined but not initialized if relevant f_line is not executed.
|
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*/
|
||||
|
||||
int offset = s->slots++;
|
||||
|
||||
while (!s->name)
|
||||
{
|
||||
s = s->next;
|
||||
ASSERT(s);
|
||||
offset += s->slots;
|
||||
}
|
||||
|
||||
if (offset >= 0xff)
|
||||
cf_error("Too many variables, at most 255 allowed");
|
||||
|
||||
return offset;
|
||||
}
|
||||
|
||||
/*
|
||||
* Sets and their items are during parsing handled as lists, linked
|
||||
* through left ptr. The first item in a list also contains a pointer
|
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@ -287,6 +317,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
|
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INT, BOOL, IP, TYPE, PREFIX, RD, PAIR, QUAD, EC, LC,
|
||||
SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, LCLIST,
|
||||
IF, THEN, ELSE, CASE,
|
||||
FOR, IN, DO,
|
||||
TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
|
||||
FROM, GW, NET, MASK, PROTO, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS,
|
||||
ROA_CHECK, ASN, SRC, DST,
|
||||
@ -305,13 +336,14 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
|
||||
%nonassoc ELSE
|
||||
|
||||
%type <xp> cmds_int cmd_prep
|
||||
%type <x> term block cmd cmds constant constructor print_list var_list function_call symbol_value bgp_path_expr bgp_path bgp_path_tail
|
||||
%type <x> term cmd cmd_var cmds cmds_scoped constant constructor print_list var var_init var_list function_call symbol_value bgp_path_expr bgp_path bgp_path_tail
|
||||
%type <fsa> static_attr
|
||||
%type <fab> attr_bit
|
||||
%type <f> filter where_filter
|
||||
%type <fl> filter_body function_body
|
||||
%type <flv> lvalue
|
||||
%type <i> type function_args function_vars
|
||||
%type <i> type function_vars
|
||||
%type <fa> function_argsn function_args
|
||||
%type <ecs> ec_kind
|
||||
%type <fret> break_command
|
||||
%type <i32> cnum
|
||||
@ -320,6 +352,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
|
||||
%type <v> set_atom switch_atom fipa
|
||||
%type <px> fprefix
|
||||
%type <t> get_cf_position
|
||||
%type <s> for_var
|
||||
|
||||
CF_GRAMMAR
|
||||
|
||||
@ -343,7 +376,7 @@ filter_def:
|
||||
|
||||
conf: filter_eval ;
|
||||
filter_eval:
|
||||
EVAL term { f_eval_int(f_linearize($2)); }
|
||||
EVAL term { f_eval_int(f_linearize($2, 1)); }
|
||||
;
|
||||
|
||||
conf: custom_attr ;
|
||||
@ -425,25 +458,28 @@ type:
|
||||
;
|
||||
|
||||
function_argsn:
|
||||
/* EMPTY */
|
||||
/* EMPTY */ { $$ = NULL; }
|
||||
| function_argsn type symbol ';' {
|
||||
if ($3->scope->slots >= 0xfe) cf_error("Too many declarations, at most 255 allowed");
|
||||
cf_define_symbol($3, SYM_VARIABLE | $2, offset, $3->scope->slots++);
|
||||
$$ = cfg_alloc(sizeof(struct f_arg));
|
||||
$$->arg = cf_define_symbol($3, SYM_VARIABLE | $2, offset, sym_->scope->slots++);
|
||||
$$->next = $1;
|
||||
}
|
||||
;
|
||||
|
||||
function_args:
|
||||
'(' ')' { $$ = 0; }
|
||||
'(' ')' { $$ = NULL; }
|
||||
| '(' function_argsn type symbol ')' {
|
||||
cf_define_symbol($4, SYM_VARIABLE | $3, offset, $4->scope->slots++);
|
||||
$$ = $4->scope->slots;
|
||||
$$ = cfg_alloc(sizeof(struct f_arg));
|
||||
$$->arg = cf_define_symbol($4, SYM_VARIABLE | $3, offset, sym_->scope->slots++);
|
||||
$$->next = $2;
|
||||
}
|
||||
;
|
||||
|
||||
function_vars:
|
||||
/* EMPTY */ { $$ = 0; }
|
||||
| function_vars type symbol ';' {
|
||||
cf_define_symbol($3, SYM_VARIABLE | $2, offset, $3->scope->slots++);
|
||||
cf_define_symbol($3, SYM_VARIABLE | $2, offset, f_new_var(sym_->scope));
|
||||
$$ = $1 + 1;
|
||||
}
|
||||
;
|
||||
@ -471,20 +507,35 @@ where_filter:
|
||||
|
||||
function_body:
|
||||
function_vars '{' cmds '}' {
|
||||
$$ = f_linearize($3);
|
||||
$$ = f_linearize($3, 0);
|
||||
$$->vars = $1;
|
||||
}
|
||||
;
|
||||
|
||||
conf: function_def ;
|
||||
function_def:
|
||||
FUNCTION symbol { DBG( "Beginning of function %s\n", $2->name );
|
||||
FUNCTION symbol {
|
||||
DBG( "Beginning of function %s\n", $2->name );
|
||||
$2 = cf_define_symbol($2, SYM_FUNCTION, function, NULL);
|
||||
cf_push_scope($2);
|
||||
} function_args function_body {
|
||||
DBG("Definition of function %s with %u args and %u local vars.\n", $2->name, $4, $5->vars);
|
||||
$5->args = $4;
|
||||
$2->function = $5;
|
||||
} function_args {
|
||||
/* Make dummy f_line for storing function prototype */
|
||||
struct f_line *dummy = cfg_allocz(sizeof(struct f_line));
|
||||
$2->function = dummy;
|
||||
|
||||
/* Revert the args */
|
||||
while ($4) {
|
||||
struct f_arg *tmp = $4;
|
||||
$4 = $4->next;
|
||||
|
||||
tmp->next = dummy->arg_list;
|
||||
dummy->arg_list = tmp;
|
||||
dummy->args++;
|
||||
}
|
||||
} function_body {
|
||||
$6->args = $2->function->args;
|
||||
$6->arg_list = $2->function->arg_list;
|
||||
$2->function = $6;
|
||||
cf_pop_scope();
|
||||
}
|
||||
;
|
||||
@ -495,7 +546,11 @@ cmds: /* EMPTY */ { $$ = NULL; }
|
||||
| cmds_int { $$ = $1.begin; }
|
||||
;
|
||||
|
||||
cmd_prep: cmd {
|
||||
cmds_scoped: { cf_push_soft_scope(); } cmds { cf_pop_soft_scope(); $$ = $2; } ;
|
||||
|
||||
cmd_var: var | cmd ;
|
||||
|
||||
cmd_prep: cmd_var {
|
||||
$$.begin = $$.end = $1;
|
||||
if ($1)
|
||||
while ($$.end->next)
|
||||
@ -517,15 +572,6 @@ cmds_int: cmd_prep
|
||||
}
|
||||
;
|
||||
|
||||
block:
|
||||
cmd {
|
||||
$$=$1;
|
||||
}
|
||||
| '{' cmds '}' {
|
||||
$$=$2;
|
||||
}
|
||||
;
|
||||
|
||||
/*
|
||||
* Complex types, their bison value is struct f_val
|
||||
*/
|
||||
@ -549,7 +595,7 @@ set_atom:
|
||||
| VPN_RD { $$.type = T_RD; $$.val.ec = $1; }
|
||||
| ENUM { $$.type = pair_a($1); $$.val.i = pair_b($1); }
|
||||
| '(' term ')' {
|
||||
if (f_eval(f_linearize($2), &($$)) > F_RETURN) cf_error("Runtime error");
|
||||
if (f_eval(f_linearize($2, 1), &($$)) > F_RETURN) cf_error("Runtime error");
|
||||
if (!f_valid_set_type($$.type)) cf_error("Set-incompatible type");
|
||||
}
|
||||
| symbol_known {
|
||||
@ -561,13 +607,13 @@ set_atom:
|
||||
|
||||
switch_atom:
|
||||
NUM { $$.type = T_INT; $$.val.i = $1; }
|
||||
| '(' term ')' { $$.type = T_INT; $$.val.i = f_eval_int(f_linearize($2)); }
|
||||
| '(' term ')' { $$.type = T_INT; $$.val.i = f_eval_int(f_linearize($2, 1)); }
|
||||
| fipa { $$ = $1; }
|
||||
| ENUM { $$.type = pair_a($1); $$.val.i = pair_b($1); }
|
||||
;
|
||||
|
||||
cnum:
|
||||
term { $$ = f_eval_int(f_linearize($1)); }
|
||||
term { $$ = f_eval_int(f_linearize($1, 1)); }
|
||||
|
||||
pair_item:
|
||||
'(' cnum ',' cnum ')' { $$ = f_new_pair_item($2, $2, $4, $4); }
|
||||
@ -651,19 +697,19 @@ fprefix_set:
|
||||
;
|
||||
|
||||
switch_body: /* EMPTY */ { $$ = NULL; }
|
||||
| switch_body switch_items ':' cmds {
|
||||
| switch_body switch_items ':' cmds_scoped {
|
||||
/* Fill data fields */
|
||||
struct f_tree *t;
|
||||
struct f_line *line = f_linearize($4);
|
||||
struct f_line *line = f_linearize($4, 0);
|
||||
for (t = $2; t; t = t->left)
|
||||
t->data = line;
|
||||
$$ = f_merge_items($1, $2);
|
||||
}
|
||||
| switch_body ELSECOL cmds {
|
||||
| switch_body ELSECOL cmds_scoped {
|
||||
struct f_tree *t = f_new_tree();
|
||||
t->from.type = t->to.type = T_VOID;
|
||||
t->right = t;
|
||||
t->data = f_linearize($3);
|
||||
t->data = f_linearize($3, 0);
|
||||
$$ = f_merge_items($1, t);
|
||||
}
|
||||
;
|
||||
@ -680,6 +726,7 @@ bgp_path:
|
||||
bgp_path_tail:
|
||||
NUM bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .asn = $1, .kind = PM_ASN, }, }); $$->next = $2; }
|
||||
| NUM DDOT NUM bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .from = $1, .to = $3, .kind = PM_ASN_RANGE }, }); $$->next = $4; }
|
||||
| '[' ']' bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .set = NULL, .kind = PM_ASN_SET }, }); $$->next = $3; }
|
||||
| '[' set_items ']' bgp_path_tail {
|
||||
if ($2->from.type != T_INT) cf_error("Only integer sets allowed in path mask");
|
||||
$$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .set = build_tree($2), .kind = PM_ASN_SET }, }); $$->next = $4;
|
||||
@ -699,6 +746,7 @@ constant:
|
||||
| fipa { $$ = f_new_inst(FI_CONSTANT, $1); }
|
||||
| VPN_RD { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_RD, .val.ec = $1, }); }
|
||||
| net_ { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_NET, .val.net = $1, }); }
|
||||
| '[' ']' { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_SET, .val.t = NULL, }); }
|
||||
| '[' set_items ']' {
|
||||
DBG( "We've got a set here..." );
|
||||
$$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_SET, .val.t = build_tree($2), });
|
||||
@ -722,27 +770,22 @@ var_list: /* EMPTY */ { $$ = NULL; }
|
||||
| var_list ',' term { $$ = $3; $$->next = $1; }
|
||||
|
||||
function_call:
|
||||
symbol_known '(' var_list ')' {
|
||||
symbol_known '(' var_list ')'
|
||||
{
|
||||
if ($1->class != SYM_FUNCTION)
|
||||
cf_error("You can't call something which is not a function. Really.");
|
||||
|
||||
struct f_inst *fc = f_new_inst(FI_CALL, $1);
|
||||
uint args = 0;
|
||||
/* Revert the var_list */
|
||||
struct f_inst *args = NULL;
|
||||
while ($3) {
|
||||
args++;
|
||||
struct f_inst *tmp = $3->next;
|
||||
$3->next = fc;
|
||||
struct f_inst *tmp = $3;
|
||||
$3 = $3->next;
|
||||
|
||||
fc = $3;
|
||||
$3 = tmp;
|
||||
tmp->next = args;
|
||||
args = tmp;
|
||||
}
|
||||
|
||||
if (args != $1->function->args)
|
||||
cf_error("Function call '%s' got %u arguments, need %u arguments.",
|
||||
$1->name, args, $1->function->args);
|
||||
|
||||
$$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_VOID });
|
||||
$$->next = fc;
|
||||
$$ = f_new_inst(FI_CALL, args, $1);
|
||||
}
|
||||
;
|
||||
|
||||
@ -866,13 +909,44 @@ print_list: /* EMPTY */ { $$ = NULL; }
|
||||
}
|
||||
;
|
||||
|
||||
var_init:
|
||||
/* empty */ { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { }); }
|
||||
| '=' term { $$ = $2; }
|
||||
;
|
||||
|
||||
var:
|
||||
type symbol var_init ';' {
|
||||
struct symbol *sym = cf_define_symbol($2, SYM_VARIABLE | $1, offset, f_new_var(sym_->scope));
|
||||
$$ = f_new_inst(FI_VAR_INIT, $3, sym);
|
||||
}
|
||||
|
||||
for_var:
|
||||
type symbol { $$ = cf_define_symbol($2, SYM_VARIABLE | $1, offset, f_new_var(sym_->scope)); }
|
||||
| CF_SYM_KNOWN { $$ = $1; cf_assert_symbol($1, SYM_VARIABLE); }
|
||||
;
|
||||
|
||||
cmd:
|
||||
IF term THEN block {
|
||||
'{' cmds_scoped '}' {
|
||||
$$ = $2;
|
||||
}
|
||||
| IF term THEN cmd {
|
||||
$$ = f_new_inst(FI_CONDITION, $2, $4, NULL);
|
||||
}
|
||||
| IF term THEN block ELSE block {
|
||||
| IF term THEN cmd ELSE cmd {
|
||||
$$ = f_new_inst(FI_CONDITION, $2, $4, $6);
|
||||
}
|
||||
| FOR {
|
||||
/* Reserve space for walk data on stack */
|
||||
cf_push_scope(NULL);
|
||||
conf_this_scope->slots += 2;
|
||||
} for_var IN
|
||||
/* Parse term in the parent scope */
|
||||
{ conf_this_scope->active = 0; } term { conf_this_scope->active = 1; }
|
||||
DO cmd {
|
||||
cf_pop_scope();
|
||||
$$ = f_new_inst(FI_FOR_INIT, $6, $3);
|
||||
$$->next = f_new_inst(FI_FOR_NEXT, $3, $9);
|
||||
}
|
||||
| symbol_known '=' term ';' {
|
||||
switch ($1->class) {
|
||||
case SYM_VARIABLE_RANGE:
|
||||
|
||||
@ -71,6 +71,7 @@ btype
|
||||
f_type_element_type(btype t)
|
||||
{
|
||||
switch(t) {
|
||||
case T_PATH: return T_INT;
|
||||
case T_CLIST: return T_PAIR;
|
||||
case T_ECLIST: return T_EC;
|
||||
case T_LCLIST: return T_LC;
|
||||
@ -78,6 +79,8 @@ f_type_element_type(btype t)
|
||||
};
|
||||
}
|
||||
|
||||
const struct f_trie f_const_empty_trie = { .ipv4 = -1, };
|
||||
|
||||
const struct f_val f_const_empty_path = {
|
||||
.type = T_PATH,
|
||||
.val.ad = &null_adata,
|
||||
@ -90,6 +93,9 @@ const struct f_val f_const_empty_path = {
|
||||
}, f_const_empty_lclist = {
|
||||
.type = T_LCLIST,
|
||||
.val.ad = &null_adata,
|
||||
}, f_const_empty_prefix_set = {
|
||||
.type = T_PREFIX_SET,
|
||||
.val.ti = &f_const_empty_trie,
|
||||
};
|
||||
|
||||
static void
|
||||
@ -178,7 +184,7 @@ val_compare(const struct f_val *v1, const struct f_val *v2)
|
||||
if (val_is_ip4(v1) && (v2->type == T_QUAD))
|
||||
return uint_cmp(ipa_to_u32(v1->val.ip), v2->val.i);
|
||||
|
||||
debug( "Types do not match in val_compare\n" );
|
||||
DBG( "Types do not match in val_compare\n" );
|
||||
return F_CMP_ERROR;
|
||||
}
|
||||
|
||||
@ -292,6 +298,12 @@ val_same(const struct f_val *v1, const struct f_val *v2)
|
||||
int
|
||||
clist_set_type(const struct f_tree *set, struct f_val *v)
|
||||
{
|
||||
if (!set)
|
||||
{
|
||||
v->type = T_VOID;
|
||||
return 1;
|
||||
}
|
||||
|
||||
switch (set->from.type)
|
||||
{
|
||||
case T_PAIR:
|
||||
@ -528,6 +540,9 @@ val_in_range(const struct f_val *v1, const struct f_val *v2)
|
||||
if (v2->type != T_SET)
|
||||
return F_CMP_ERROR;
|
||||
|
||||
if (!v2->val.t)
|
||||
return 0;
|
||||
|
||||
/* With integrated Quad<->IP implicit conversion */
|
||||
if ((v1->type == v2->val.t->from.type) ||
|
||||
((v1->type == T_QUAD) && val_is_ip4(&(v2->val.t->from)) && val_is_ip4(&(v2->val.t->to))))
|
||||
|
||||
@ -209,9 +209,11 @@ int val_in_range(const struct f_val *v1, const struct f_val *v2);
|
||||
|
||||
int clist_set_type(const struct f_tree *set, struct f_val *v);
|
||||
static inline int eclist_set_type(const struct f_tree *set)
|
||||
{ return set->from.type == T_EC; }
|
||||
{ return !set || set->from.type == T_EC; }
|
||||
static inline int lclist_set_type(const struct f_tree *set)
|
||||
{ return set->from.type == T_LC; }
|
||||
{ return !set || set->from.type == T_LC; }
|
||||
static inline int path_set_type(const struct f_tree *set)
|
||||
{ return !set || set->from.type == T_INT; }
|
||||
|
||||
const struct adata *clist_filter(struct linpool *pool, const struct adata *list, const struct f_val *set, int pos);
|
||||
const struct adata *eclist_filter(struct linpool *pool, const struct adata *list, const struct f_val *set, int pos);
|
||||
@ -227,7 +229,7 @@ undef_value(struct f_val v)
|
||||
(v.val.ad == &null_adata);
|
||||
}
|
||||
|
||||
extern const struct f_val f_const_empty_path, f_const_empty_clist, f_const_empty_eclist, f_const_empty_lclist;
|
||||
extern const struct f_val f_const_empty_path, f_const_empty_clist, f_const_empty_eclist, f_const_empty_lclist, f_const_empty_prefix_set;
|
||||
static inline const struct f_val *f_get_empty(btype t)
|
||||
{
|
||||
switch (t) {
|
||||
|
||||
@ -191,6 +191,12 @@ if (f$1->type && f$2->type && (f$1->type != f$2->type) &&
|
||||
cf_error("Arguments $1 and $2 of %s must be of the same type", f_instruction_name(what->fi_code));
|
||||
FID_INTERPRET_BODY()')
|
||||
|
||||
m4_define(ARG_PREFER_SAME_TYPE, `
|
||||
FID_NEW_BODY()m4_dnl
|
||||
if (f$1->type && f$2->type && (f$1->type != f$2->type))
|
||||
(void) (f_const_promotion(f$2, f$1->type) || f_const_promotion(f$1, f$2->type));
|
||||
FID_INTERPRET_BODY()')
|
||||
|
||||
# Executing another filter line. This replaces the recursion
|
||||
# that was needed in the former implementation.
|
||||
m4_define(LINEX, `FID_INTERPRET_EXEC()LINEX_($1)FID_INTERPRET_NEW()return $1 FID_INTERPRET_BODY()')
|
||||
@ -216,7 +222,7 @@ whati->f$1 = f$1;
|
||||
FID_DUMP_BODY()m4_dnl
|
||||
f_dump_line(item->fl$1, indent + 1);
|
||||
FID_LINEARIZE_BODY()m4_dnl
|
||||
item->fl$1 = f_linearize(whati->f$1);
|
||||
item->fl$1 = f_linearize(whati->f$1, $2);
|
||||
FID_SAME_BODY()m4_dnl
|
||||
if (!f_same(f1->fl$1, f2->fl$1)) return 0;
|
||||
FID_ITERATE_BODY()m4_dnl
|
||||
@ -244,9 +250,13 @@ m4_define(ERROR,
|
||||
# This macro specifies result type and makes there are no conflicting definitions
|
||||
m4_define(RESULT_TYPE,
|
||||
`m4_ifdef([[INST_RESULT_TYPE]],
|
||||
[[m4_ifelse(INST_RESULT_TYPE,$1,,[[ERROR([[Multiple type definitons]])]])]],
|
||||
[[m4_ifelse(INST_RESULT_TYPE,$1,,[[ERROR([[Multiple type definitions in]] INST_NAME)]])]],
|
||||
[[m4_define(INST_RESULT_TYPE,$1) RESULT_TYPE_($1)]])')
|
||||
|
||||
m4_define(RESULT_TYPE_CHECK,
|
||||
`m4_ifelse(INST_OUTVAL,0,,
|
||||
[[m4_ifdef([[INST_RESULT_TYPE]],,[[ERROR([[Missing type definition in]] INST_NAME)]])]])')
|
||||
|
||||
m4_define(RESULT_TYPE_, `
|
||||
FID_NEW_BODY()m4_dnl
|
||||
what->type = $1;
|
||||
@ -300,6 +310,7 @@ m4_define(FID_ITERATE, `FID_ZONE(10, Iteration)')
|
||||
|
||||
# This macro does all the code wrapping. See inline comments.
|
||||
m4_define(INST_FLUSH, `m4_ifdef([[INST_NAME]], [[
|
||||
RESULT_TYPE_CHECK()m4_dnl Check for defined RESULT_TYPE()
|
||||
FID_ENUM()m4_dnl Contents of enum fi_code { ... }
|
||||
INST_NAME(),
|
||||
FID_ENUM_STR()m4_dnl Contents of const char * indexed by enum fi_code
|
||||
@ -375,6 +386,7 @@ case INST_NAME(): {
|
||||
#undef whati
|
||||
#undef item
|
||||
dest->items[pos].fi_code = what->fi_code;
|
||||
dest->items[pos].flags = what->flags;
|
||||
dest->items[pos].lineno = what->lineno;
|
||||
break;
|
||||
}
|
||||
@ -402,6 +414,7 @@ m4_define(INST, `m4_dnl This macro is called on beginning of each instruction
|
||||
INST_FLUSH()m4_dnl First, old data is flushed
|
||||
m4_define([[INST_NAME]], [[$1]])m4_dnl Then we store instruction name,
|
||||
m4_define([[INST_INVAL]], [[$2]])m4_dnl instruction input value count,
|
||||
m4_define([[INST_OUTVAL]], [[$3]])m4_dnl instruction output value count,
|
||||
m4_undefine([[INST_NEVER_CONSTANT]])m4_dnl reset NEVER_CONSTANT trigger,
|
||||
m4_undefine([[INST_RESULT_TYPE]])m4_dnl and reset RESULT_TYPE value.
|
||||
FID_INTERPRET_BODY()m4_dnl By default, every code is interpreter code.
|
||||
@ -505,6 +518,11 @@ f_const_promotion(struct f_inst *arg, btype want)
|
||||
return 1;
|
||||
}
|
||||
|
||||
else if ((c->type == T_SET) && (!c->val.t) && (want == T_PREFIX_SET)) {
|
||||
*c = f_const_empty_prefix_set;
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -560,7 +578,7 @@ FID_WR_PUT(8)
|
||||
}
|
||||
|
||||
struct f_line *
|
||||
f_linearize_concat(const struct f_inst * const inst[], uint count)
|
||||
f_linearize_concat(const struct f_inst * const inst[], uint count, uint results)
|
||||
{
|
||||
uint len = 0;
|
||||
for (uint i=0; i<count; i++)
|
||||
@ -572,6 +590,8 @@ f_linearize_concat(const struct f_inst * const inst[], uint count)
|
||||
for (uint i=0; i<count; i++)
|
||||
out->len = linearize(out, inst[i], out->len);
|
||||
|
||||
out->results = results;
|
||||
|
||||
#ifdef LOCAL_DEBUG
|
||||
f_dump_line(out, 0);
|
||||
#endif
|
||||
@ -640,6 +660,7 @@ FID_WR_PUT(4)m4_dnl
|
||||
struct f_inst {
|
||||
struct f_inst *next; /* Next instruction */
|
||||
enum f_instruction_code fi_code; /* Instruction code */
|
||||
enum f_instruction_flags flags; /* Flags, instruction-specific */
|
||||
btype type; /* Type of returned value, if known */
|
||||
int size; /* How many instructions are underneath */
|
||||
int lineno; /* Line number */
|
||||
|
||||
242
filter/f-inst.c
242
filter/f-inst.c
@ -62,8 +62,9 @@
|
||||
* m4_dnl INST(FI_NOP, in, out) { enum value, input args, output args
|
||||
* m4_dnl ARG(num, type); argument, its id (in data fields) and type accessible by v1, v2, v3
|
||||
* m4_dnl ARG_ANY(num); argument with no type check accessible by v1, v2, v3
|
||||
* m4_dnl ARG_TYPE(num, type); just declare the type of argument
|
||||
* m4_dnl VARARG; variable-length argument list; accessible by vv(i) and whati->varcount
|
||||
* m4_dnl LINE(num, unused); this argument has to be converted to its own f_line
|
||||
* m4_dnl LINE(num, out); this argument has to be converted to its own f_line
|
||||
* m4_dnl SYMBOL; symbol handed from config
|
||||
* m4_dnl STATIC_ATTR; static attribute definition
|
||||
* m4_dnl DYNAMIC_ATTR; dynamic attribute definition
|
||||
@ -80,10 +81,17 @@
|
||||
* m4_dnl )
|
||||
*
|
||||
* m4_dnl RESULT(type, union-field, value); putting this on value stack
|
||||
* m4_dnl RESULT_(type, union-field, value); like RESULT(), but do not declare the type
|
||||
* m4_dnl RESULT_VAL(value-struct); pass the struct f_val directly
|
||||
* m4_dnl RESULT_TYPE(type); just declare the type of result value
|
||||
* m4_dnl RESULT_VOID; return undef
|
||||
* m4_dnl }
|
||||
*
|
||||
* Note that runtime arguments m4_dnl (ARG*, VARARG) must be defined before
|
||||
* parse-time arguments m4_dnl (LINE, SYMBOL, ...). During linearization,
|
||||
* first ones move position in f_line by linearizing arguments first, while
|
||||
* second ones store data to the current position.
|
||||
*
|
||||
* Also note that the { ... } blocks are not respected by M4 at all.
|
||||
* If you get weird unmatched-brace-pair errors, check what it generated and why.
|
||||
* What is really considered as one instruction is not the { ... } block
|
||||
@ -91,6 +99,24 @@
|
||||
*
|
||||
* Other code is just copied into the interpreter part.
|
||||
*
|
||||
* The filter language uses a simple type system, where values have types
|
||||
* (constants T_*) and also terms (instructions) are statically typed. Our
|
||||
* static typing is partial (some terms do not declare types of arguments
|
||||
* or results), therefore it can detect most but not all type errors and
|
||||
* therefore we still have runtime type checks.
|
||||
*
|
||||
* m4_dnl Types of arguments are declared by macros ARG() and ARG_TYPE(),
|
||||
* m4_dnl types of results are declared by RESULT() and RESULT_TYPE().
|
||||
* m4_dnl Macros ARG_ANY(), RESULT_() and RESULT_VAL() do not declare types
|
||||
* m4_dnl themselves, but can be combined with ARG_TYPE() / RESULT_TYPE().
|
||||
*
|
||||
* m4_dnl Note that types should be declared only once. If there are
|
||||
* m4_dnl multiple RESULT() macros in an instruction definition, they must
|
||||
* m4_dnl use the exact same expression for type, or they should be replaced
|
||||
* m4_dnl by multiple RESULT_() macros and a common RESULT_TYPE() macro.
|
||||
* m4_dnl See e.g. FI_EA_GET or FI_MIN instructions.
|
||||
*
|
||||
*
|
||||
* If you are satisfied with this, you don't need to read the following
|
||||
* detailed description of what is really done with the instruction definitions.
|
||||
*
|
||||
@ -215,6 +241,37 @@
|
||||
*
|
||||
* m4_dnl If you are stymied, see FI_CALL or FI_CONSTANT or just search for
|
||||
* m4_dnl the mentioned macros in this file to see what is happening there in wild.
|
||||
*
|
||||
*
|
||||
* A note about soundness of the type system:
|
||||
*
|
||||
* A type system is sound when types of expressions are consistent with
|
||||
* types of values resulting from evaluation of such expressions. Untyped
|
||||
* expressions are ok, but badly typed expressions are not sound. So is
|
||||
* the type system of BIRD filtering code sound? There are some points:
|
||||
*
|
||||
* All cases of (one) m4_dnl RESULT() macro are obviously ok, as the macro
|
||||
* both declares a type and returns a value. One have to check instructions
|
||||
* that use m4_dnl RESULT_TYPE() macro. There are two issues:
|
||||
*
|
||||
* FI_AND, FI_OR - second argument is statically checked to be T_BOOL and
|
||||
* passed as result without dynamic typecheck, declared to be T_BOOL. If
|
||||
* an untyped non-bool expression is used as a second argument, then
|
||||
* the mismatched type is returned.
|
||||
*
|
||||
* FI_VAR_GET - soundness depends on consistency of declared symbol types
|
||||
* and stored values. This is maintained when values are stored by
|
||||
* FI_VAR_SET, but when they are stored by FI_CALL, only static checking is
|
||||
* used, so when an untyped expression returning mismatched value is used
|
||||
* as a function argument, then inconsistent value is stored and subsequent
|
||||
* FI_VAR_GET would be unsound.
|
||||
*
|
||||
* Both of these issues are inconsequential, as mismatched values from
|
||||
* unsound expressions will be caught by dynamic typechecks like mismatched
|
||||
* values from untyped expressions.
|
||||
*
|
||||
* Also note that FI_CALL is the only expression without properly declared
|
||||
* result type.
|
||||
*/
|
||||
|
||||
/* Binary operators */
|
||||
@ -255,7 +312,7 @@
|
||||
RESULT_TYPE(T_BOOL);
|
||||
|
||||
if (v1.val.i)
|
||||
LINE(2,0);
|
||||
LINE(2,1);
|
||||
else
|
||||
RESULT_VAL(v1);
|
||||
}
|
||||
@ -265,7 +322,7 @@
|
||||
RESULT_TYPE(T_BOOL);
|
||||
|
||||
if (!v1.val.i)
|
||||
LINE(2,0);
|
||||
LINE(2,1);
|
||||
else
|
||||
RESULT_VAL(v1);
|
||||
}
|
||||
@ -358,7 +415,7 @@
|
||||
break;
|
||||
|
||||
case T_SET:
|
||||
if (vv(i).val.t->from.type != T_INT)
|
||||
if (!path_set_type(vv(i).val.t))
|
||||
runtime("Only integer sets allowed in path mask");
|
||||
|
||||
pm->item[i] = (struct f_path_mask_item) {
|
||||
@ -380,12 +437,14 @@
|
||||
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));
|
||||
}
|
||||
|
||||
@ -456,6 +515,18 @@
|
||||
RESULT(T_BOOL, i, ipa_is_ip4(v1.val.ip));
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
/* Set to indirect value prepared in v1 */
|
||||
INST(FI_VAR_SET, 1, 0) {
|
||||
NEVER_CONSTANT;
|
||||
@ -486,12 +557,100 @@
|
||||
RESULT_VAL(val);
|
||||
}
|
||||
|
||||
INST(FI_FOR_INIT, 1, 0) {
|
||||
NEVER_CONSTANT;
|
||||
ARG_ANY(1);
|
||||
SYMBOL;
|
||||
|
||||
FID_NEW_BODY()
|
||||
ASSERT((sym->class & ~0xff) == SYM_VARIABLE);
|
||||
|
||||
/* Static type check */
|
||||
if (f1->type)
|
||||
{
|
||||
enum btype t_var = (sym->class & 0xff);
|
||||
enum btype t_arg = f_type_element_type(f1->type);
|
||||
if (!t_arg)
|
||||
cf_error("Value of expression in FOR must be iterable, got %s",
|
||||
f_type_name(f1->type));
|
||||
if (t_var != t_arg)
|
||||
cf_error("Loop variable '%s' in FOR must be %s, is %s",
|
||||
sym->name, f_type_name(t_arg), f_type_name(t_var));
|
||||
}
|
||||
|
||||
FID_INTERPRET_BODY()
|
||||
|
||||
/* Dynamic type check */
|
||||
if ((sym->class & 0xff) != f_type_element_type(v1.type))
|
||||
runtime("Mismatched argument and variable type");
|
||||
|
||||
/* Setup the index */
|
||||
v2 = (struct f_val) { .type = T_INT, .val.i = 0 };
|
||||
|
||||
/* Keep v1 and v2 on the stack */
|
||||
fstk->vcnt += 2;
|
||||
}
|
||||
|
||||
INST(FI_FOR_NEXT, 2, 0) {
|
||||
NEVER_CONSTANT;
|
||||
SYMBOL;
|
||||
|
||||
/* Type checks are done in FI_FOR_INIT */
|
||||
|
||||
/* Loop variable */
|
||||
struct f_val *var = &fstk->vstk[curline.vbase + sym->offset];
|
||||
int step = 0;
|
||||
|
||||
switch(v1.type)
|
||||
{
|
||||
case T_PATH:
|
||||
var->type = T_INT;
|
||||
step = as_path_walk(v1.val.ad, &v2.val.i, &var->val.i);
|
||||
break;
|
||||
|
||||
case T_CLIST:
|
||||
var->type = T_PAIR;
|
||||
step = int_set_walk(v1.val.ad, &v2.val.i, &var->val.i);
|
||||
break;
|
||||
|
||||
case T_ECLIST:
|
||||
var->type = T_EC;
|
||||
step = ec_set_walk(v1.val.ad, &v2.val.i, &var->val.ec);
|
||||
break;
|
||||
|
||||
case T_LCLIST:
|
||||
var->type = T_LC;
|
||||
step = lc_set_walk(v1.val.ad, &v2.val.i, &var->val.lc);
|
||||
break;
|
||||
|
||||
default:
|
||||
runtime( "Clist or lclist expected" );
|
||||
}
|
||||
|
||||
if (step)
|
||||
{
|
||||
/* Keep v1 and v2 on the stack */
|
||||
fstk->vcnt += 2;
|
||||
|
||||
/* Repeat this instruction */
|
||||
curline.pos--;
|
||||
|
||||
/* Execute the loop body */
|
||||
LINE(1, 0);
|
||||
|
||||
/* Space for loop variable, may be unused */
|
||||
fstk->vcnt += 1;
|
||||
}
|
||||
else
|
||||
var->type = T_VOID;
|
||||
}
|
||||
|
||||
INST(FI_CONDITION, 1, 0) {
|
||||
ARG(1, T_BOOL);
|
||||
if (v1.val.i)
|
||||
LINE(2,0);
|
||||
else
|
||||
LINE(3,1);
|
||||
LINE(3,0);
|
||||
}
|
||||
|
||||
INST(FI_PRINT, 0, 0) {
|
||||
@ -771,6 +930,7 @@
|
||||
INST(FI_DEFAULT, 2, 1) {
|
||||
ARG_ANY(1);
|
||||
ARG_ANY(2);
|
||||
RESULT_TYPE(f_type_element_type(v2.type));
|
||||
|
||||
log(L_INFO "Type of arg 1 is: %d", v1.type);
|
||||
|
||||
@ -945,7 +1105,7 @@
|
||||
RESULT(T_INT, i, v1.val.lc.ldp2);
|
||||
}
|
||||
|
||||
INST(FI_MIN, 1, 1) { /* Get minimum element from set */
|
||||
INST(FI_MIN, 1, 1) { /* Get minimum element from list */
|
||||
ARG_ANY(1);
|
||||
RESULT_TYPE(f_type_element_type(v1.type));
|
||||
switch(v1.type)
|
||||
@ -979,7 +1139,7 @@
|
||||
}
|
||||
}
|
||||
|
||||
INST(FI_MAX, 1, 1) { /* Get maximum element from set */
|
||||
INST(FI_MAX, 1, 1) { /* Get maximum element from list */
|
||||
ARG_ANY(1);
|
||||
RESULT_TYPE(f_type_element_type(v1.type));
|
||||
switch(v1.type)
|
||||
@ -1013,7 +1173,7 @@
|
||||
}
|
||||
}
|
||||
|
||||
INST(FI_RETURN, 1, 1) {
|
||||
INST(FI_RETURN, 1, 0) {
|
||||
NEVER_CONSTANT;
|
||||
/* Acquire the return value */
|
||||
ARG_ANY(1);
|
||||
@ -1041,28 +1201,59 @@
|
||||
|
||||
INST(FI_CALL, 0, 1) {
|
||||
NEVER_CONSTANT;
|
||||
VARARG;
|
||||
SYMBOL;
|
||||
|
||||
/* Fake result type declaration */
|
||||
RESULT_TYPE(T_VOID);
|
||||
|
||||
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 btype 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))
|
||||
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;
|
||||
|
||||
/* Before this instruction was called, there was the T_VOID
|
||||
* automatic return value pushed on value stack and also
|
||||
* sym->function->args function arguments. Setting the
|
||||
* vbase to point to first argument. */
|
||||
ASSERT(curline.ventry >= sym->function->args);
|
||||
curline.ventry -= sym->function->args;
|
||||
curline.vbase = curline.ventry;
|
||||
/* Arguments on stack */
|
||||
fstk->vcnt += sym->function->args;
|
||||
|
||||
/* Storage for local variables */
|
||||
f_vcnt_check_overflow(sym->function->vars);
|
||||
@ -1176,17 +1367,10 @@
|
||||
|
||||
if (v1.type == T_PATH)
|
||||
{
|
||||
const struct f_tree *set = NULL;
|
||||
u32 key = 0;
|
||||
|
||||
if (v2.type == T_INT)
|
||||
key = v2.val.i;
|
||||
else if ((v2.type == T_SET) && (v2.val.t->from.type == T_INT))
|
||||
set = v2.val.t;
|
||||
if ((v2.type == T_SET) && path_set_type(v2.val.t) || (v2.type == T_INT))
|
||||
RESULT_(T_PATH, ad, [[ as_path_filter(fpool, v1.val.ad, &v2, 0) ]]);
|
||||
else
|
||||
runtime("Can't delete non-integer (set)");
|
||||
|
||||
RESULT_(T_PATH, ad, [[ as_path_filter(fpool, v1.val.ad, set, key, 0) ]]);
|
||||
}
|
||||
|
||||
else if (v1.type == T_CLIST)
|
||||
@ -1238,10 +1422,8 @@
|
||||
|
||||
if (v1.type == T_PATH)
|
||||
{
|
||||
u32 key = 0;
|
||||
|
||||
if ((v2.type == T_SET) && (v2.val.t->from.type == T_INT))
|
||||
RESULT_(T_PATH, ad, [[ as_path_filter(fpool, v1.val.ad, v2.val.t, key, 1) ]]);
|
||||
if ((v2.type == T_SET) && path_set_type(v2.val.t))
|
||||
RESULT_(T_PATH, ad, [[ as_path_filter(fpool, v1.val.ad, &v2, 1) ]]);
|
||||
else
|
||||
runtime("Can't filter integer");
|
||||
}
|
||||
@ -1301,7 +1483,7 @@
|
||||
|
||||
}
|
||||
|
||||
INST(FI_FORMAT, 1, 0) { /* Format */
|
||||
INST(FI_FORMAT, 1, 1) { /* Format */
|
||||
ARG_ANY(1);
|
||||
RESULT(T_STRING, s, val_format_str(fpool, &v1));
|
||||
}
|
||||
|
||||
@ -22,7 +22,7 @@
|
||||
|
||||
/* Flags for instructions */
|
||||
enum f_instruction_flags {
|
||||
FIF_PRINTED = 1, /* FI_PRINT_AND_DIE: message put in buffer */
|
||||
FIF_RECURSIVE = 1, /* FI_CALL: function is directly recursive */
|
||||
} PACKED;
|
||||
|
||||
/* Include generated filter instruction declarations */
|
||||
@ -35,19 +35,26 @@ const char *f_instruction_name_(enum f_instruction_code fi);
|
||||
static inline const char *f_instruction_name(enum f_instruction_code fi)
|
||||
{ return f_instruction_name_(fi) + 3; }
|
||||
|
||||
struct f_arg {
|
||||
struct symbol *arg;
|
||||
struct f_arg *next;
|
||||
};
|
||||
|
||||
/* Filter structures for execution */
|
||||
/* Line of instructions to be unconditionally executed one after another */
|
||||
struct f_line {
|
||||
uint len; /* Line length */
|
||||
u8 args; /* Function: Args required */
|
||||
u8 vars;
|
||||
u8 results; /* Results left on stack: cmd -> 0, term -> 1 */
|
||||
struct f_arg *arg_list;
|
||||
struct f_line_item items[0]; /* The items themselves */
|
||||
};
|
||||
|
||||
/* Convert the f_inst infix tree to the f_line structures */
|
||||
struct f_line *f_linearize_concat(const struct f_inst * const inst[], uint count);
|
||||
static inline struct f_line *f_linearize(const struct f_inst *root)
|
||||
{ return f_linearize_concat(&root, 1); }
|
||||
struct f_line *f_linearize_concat(const struct f_inst * const inst[], uint count, uint results);
|
||||
static inline struct f_line *f_linearize(const struct f_inst *root, uint results)
|
||||
{ return f_linearize_concat(&root, 1, results); }
|
||||
|
||||
void f_dump_line(const struct f_line *, uint indent);
|
||||
|
||||
|
||||
@ -37,6 +37,6 @@ struct filter *f_new_where(struct f_inst *where)
|
||||
f_new_inst(FI_DIE, F_REJECT));
|
||||
|
||||
struct filter *f = cfg_allocz(sizeof(struct filter));
|
||||
f->root = f_linearize(cond);
|
||||
f->root = f_linearize(cond, 0);
|
||||
return f;
|
||||
}
|
||||
|
||||
@ -179,8 +179,7 @@ interpret(struct filter_state *fs, const struct f_line *line, struct f_val *val)
|
||||
}
|
||||
|
||||
/* End of current line. Drop local variables before exiting. */
|
||||
fstk->vcnt -= curline.line->vars;
|
||||
fstk->vcnt -= curline.line->args;
|
||||
fstk->vcnt = curline.ventry + curline.line->results;
|
||||
fstk->ecnt--;
|
||||
}
|
||||
|
||||
|
||||
210
filter/test.conf
210
filter/test.conf
@ -146,9 +146,8 @@ bt_test_same(onef, twof, 0);
|
||||
*/
|
||||
|
||||
function t_bool()
|
||||
bool b;
|
||||
{
|
||||
b = true;
|
||||
bool b = true;
|
||||
bt_assert(b);
|
||||
bt_assert(!!b);
|
||||
|
||||
@ -184,12 +183,11 @@ define xyzzy = (120+10);
|
||||
define '1a-a1' = (xyzzy-100);
|
||||
|
||||
function t_int()
|
||||
int i;
|
||||
{
|
||||
bt_assert(xyzzy = 130);
|
||||
bt_assert('1a-a1' = 30);
|
||||
|
||||
i = four;
|
||||
int i = four;
|
||||
i = 12*100 + 60/2 + i;
|
||||
i = (i + 0);
|
||||
bt_assert(i = 1234);
|
||||
@ -238,14 +236,19 @@ define is2 = [(17+2), 17, 15, 11, 8, 5, 3, 2];
|
||||
define is3 = [5, 17, 2, 11, 8, 15, 3, 19];
|
||||
|
||||
function t_int_set()
|
||||
int set is;
|
||||
{
|
||||
int set is = [];
|
||||
bt_assert(is = []);
|
||||
bt_assert(0 !~ is);
|
||||
|
||||
bt_assert(1 ~ [1,2,3]);
|
||||
bt_assert(5 ~ [1..20]);
|
||||
bt_assert(2 ~ [ 1, 2, 3 ]);
|
||||
bt_assert(5 ~ [ 4 .. 7 ]);
|
||||
bt_assert(1 !~ [ 2, 3, 4 ]);
|
||||
bt_assert(999 !~ [ 666, 333 ]);
|
||||
bt_assert(1 !~ []);
|
||||
bt_assert(1 !~ is);
|
||||
|
||||
is = [ 2, 3, 4, 7..11 ];
|
||||
bt_assert(10 ~ is);
|
||||
@ -280,6 +283,7 @@ int set is;
|
||||
bt_assert([1,4..10,20] = [1,4..10,20]);
|
||||
|
||||
bt_assert(format([ 1, 2, 1, 1, 1, 3, 4, 1, 1, 1, 5 ]) = "[1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5]");
|
||||
bt_assert(format([]) = "[]");
|
||||
}
|
||||
|
||||
bt_test_suite(t_int_set, "Testing sets of integers");
|
||||
@ -293,9 +297,8 @@ bt_test_suite(t_int_set, "Testing sets of integers");
|
||||
*/
|
||||
|
||||
function t_string()
|
||||
string st;
|
||||
{
|
||||
st = "Hello";
|
||||
string st = "Hello";
|
||||
bt_assert(format(st) = "Hello");
|
||||
bt_assert(st ~ "Hell*");
|
||||
bt_assert(st ~ "?ello");
|
||||
@ -320,9 +323,8 @@ function 'mkpair-a'(int a)
|
||||
}
|
||||
|
||||
function t_pair()
|
||||
pair pp;
|
||||
{
|
||||
pp = (1, 2);
|
||||
pair pp = (1, 2);
|
||||
bt_assert(format(pp) = "(1,2)");
|
||||
bt_assert((1,2) = pp);
|
||||
bt_assert((1,1+1) = pp);
|
||||
@ -343,10 +345,11 @@ bt_test_suite(t_pair, "Testing pairs");
|
||||
*/
|
||||
|
||||
function t_pair_set()
|
||||
pair pp;
|
||||
pair set ps;
|
||||
{
|
||||
pp = (1, 2);
|
||||
pair pp = (1, 2);
|
||||
pair set ps = [];
|
||||
bt_assert(pp !~ ps);
|
||||
|
||||
ps = [(1,(one+one)), (3,4)..(4,8), (5,*), (6,3..6)];
|
||||
bt_assert(format(ps) = "[(1,2), (3,4)..(4,8), (5,0)..(5,65535), (6,3)..(6,6)]");
|
||||
bt_assert(pp ~ ps);
|
||||
@ -363,6 +366,7 @@ pair set ps;
|
||||
bt_assert((6,6+one) !~ ps);
|
||||
bt_assert(((one+6),2) !~ ps);
|
||||
bt_assert((1,1) !~ ps);
|
||||
bt_assert(pp !~ []);
|
||||
|
||||
ps = [(20..150, 200..300), (50100..50200, 1000..50000), (*, 5+5)];
|
||||
bt_assert((100,200) ~ ps);
|
||||
@ -414,6 +418,7 @@ quad qq;
|
||||
qq = 1.2.3.4;
|
||||
bt_assert(qq ~ [1.2.3.4, 5.6.7.8]);
|
||||
bt_assert(qq !~ [1.2.1.1, 1.2.3.5]);
|
||||
bt_assert(qq !~ []);
|
||||
}
|
||||
|
||||
bt_test_suite(t_quad_set, "Testing sets of quads");
|
||||
@ -494,6 +499,7 @@ ip set ips;
|
||||
|
||||
bt_assert(1.2.3.4 !~ [ 1.2.3.3, 1.2.3.5 ]);
|
||||
bt_assert(1.2.3.4 ~ [ 1.2.3.3..1.2.3.5 ]);
|
||||
bt_assert(1.2.3.4 !~ []);
|
||||
}
|
||||
|
||||
bt_test_suite(t_ip_set, "Testing sets of ip address");
|
||||
@ -582,13 +588,34 @@ function test_pxset(prefix set pxs)
|
||||
bt_assert(1.0.0.0/8 ~ [ 1.0.0.0/8+ ]);
|
||||
bt_assert(1.0.0.0/9 !~ [ 1.0.0.0/8- ]);
|
||||
bt_assert(1.2.0.0/17 !~ [ 1.0.0.0/8{ 15 , 16 } ]);
|
||||
bt_assert(net10 !~ []);
|
||||
|
||||
bt_assert([ 10.0.0.0/8{ 15 , 17 } ] = [ 10.0.0.0/8{ 15 , 17 } ]);
|
||||
}
|
||||
|
||||
function test_empty_pxset(prefix set pxs)
|
||||
int set s0;
|
||||
prefix set s1;
|
||||
{
|
||||
s0 = [];
|
||||
s1 = [];
|
||||
bt_assert(pxs != s0);
|
||||
bt_assert(pxs = s1);
|
||||
bt_assert(pxs = []);
|
||||
}
|
||||
|
||||
function t_prefix_set()
|
||||
prefix set pxs;
|
||||
{
|
||||
pxs = [];
|
||||
bt_assert(format(pxs) = "[]");
|
||||
bt_assert(pxs = []);
|
||||
bt_assert(1.2.0.0/16 !~ []);
|
||||
bt_assert(1.2.0.0/16 !~ pxs);
|
||||
|
||||
test_empty_pxset([]);
|
||||
test_empty_pxset(pxs);
|
||||
|
||||
pxs = [ 1.2.0.0/16, 1.4.0.0/16+, 44.66.88.64/30{24,28}, 12.34.56.0/24{8,16} ];
|
||||
bt_assert(format(pxs) = "[1.2.0.0/16{0.1.0.0}, 1.4.0.0/16{0.1.255.255}, 12.34.0.0/16{1.255.0.0}, 44.66.88.64/28{0.0.1.240}]");
|
||||
|
||||
@ -673,6 +700,12 @@ bt_test_suite(t_prefix6, "Testing prefix IPv6");
|
||||
function t_prefix6_set()
|
||||
prefix set pxs;
|
||||
{
|
||||
pxs = [];
|
||||
bt_assert(format(pxs) = "[]");
|
||||
bt_assert(pxs = []);
|
||||
bt_assert(12::34/128 !~ []);
|
||||
bt_assert(12::34/128 !~ pxs);
|
||||
|
||||
bt_assert(1180::/16 ~ [ 1100::/8{15, 17} ]);
|
||||
bt_assert(12::34 = 12::34);
|
||||
bt_assert(12::34 ~ [ 12::33..12::35 ]);
|
||||
@ -790,6 +823,7 @@ int set set12;
|
||||
bt_assert(3 ~ p2);
|
||||
bt_assert(p2 ~ [2, 10..20]);
|
||||
bt_assert(p2 ~ [4, 10..20]);
|
||||
bt_assert(p2 !~ []);
|
||||
|
||||
p2 = prepend(p2, 5);
|
||||
bt_assert(p2 !~ pm1);
|
||||
@ -800,6 +834,8 @@ int set set12;
|
||||
bt_assert(p2 ~ [= 5 [2, 4, 6] 3 [1..2] 1 =]);
|
||||
bt_assert(p2 ~ [= 5 set35 3 set12 set12 =]);
|
||||
bt_assert(p2 ~ mkpath(5, 4));
|
||||
bt_assert(p2 ~ [= * [3] * =]);
|
||||
bt_assert(p2 !~ [= * [] * =]);
|
||||
|
||||
bt_assert(p2.len = 5);
|
||||
bt_assert(p2.first = 5);
|
||||
@ -808,6 +844,10 @@ int set set12;
|
||||
bt_assert(p2.len = 5);
|
||||
bt_assert(delete(p2, 3) = prepend(prepend(prepend(prepend(+empty+, 1), 2), 4), 5));
|
||||
bt_assert(filter(p2, [1..3]) = prepend(prepend(prepend(+empty+, 1), 2), 3));
|
||||
bt_assert(delete(p2, []) = p2);
|
||||
bt_assert(filter(p2, []) = +empty+);
|
||||
bt_assert(delete(prepend(prepend(+empty+, 0), 1), []) = prepend(prepend(+empty+, 0), 1));
|
||||
bt_assert(filter(prepend(prepend(+empty+, 0), 1), []) = +empty+);
|
||||
|
||||
p2 = prepend( + empty +, 5 );
|
||||
p2 = prepend( p2, 4 );
|
||||
@ -827,6 +867,15 @@ int set set12;
|
||||
bt_assert(delete(p2, [4..5]) = prepend(prepend(prepend(prepend(+empty+, 3), 3), 2), 1));
|
||||
|
||||
bt_assert(format([= 1 2+ 3 =]) = "[= 1 2 + 3 =]");
|
||||
|
||||
# iteration over path
|
||||
int x = 0;
|
||||
int y = 0;
|
||||
for int i in p2 do {
|
||||
x = x + i;
|
||||
y = y + x;
|
||||
}
|
||||
bt_assert(x = 18 && y = 50);
|
||||
}
|
||||
|
||||
bt_test_suite(t_path, "Testing paths");
|
||||
@ -868,6 +917,7 @@ clist r;
|
||||
bt_assert(l ~ [(2,2..3)]);
|
||||
bt_assert(l ~ [(1,1..2)]);
|
||||
bt_assert(l ~ [(1,1)..(1,2)]);
|
||||
bt_assert(l !~ []);
|
||||
|
||||
l = add(l, (2,5));
|
||||
l = add(l, (5,one));
|
||||
@ -905,6 +955,9 @@ clist r;
|
||||
bt_assert(l !~ [(*,(one+6))]);
|
||||
bt_assert(l !~ [(*, (one+one+one))]);
|
||||
|
||||
bt_assert(delete(l, []) = l);
|
||||
bt_assert(filter(l, []) = -empty-);
|
||||
|
||||
l = delete(l, [(*,(one+onef(3)))]);
|
||||
l = delete(l, [(*,(4+one))]);
|
||||
bt_assert(l = add(-empty-, (3,1)));
|
||||
@ -949,6 +1002,12 @@ clist r;
|
||||
bt_assert(format(r) = "(clist (2,1) (1,3) (2,2) (3,1) (2,3))");
|
||||
bt_assert(r.min = (1,3));
|
||||
bt_assert(r.max = (3,1));
|
||||
|
||||
# iteration over clist
|
||||
int x = 0;
|
||||
for pair c in r do
|
||||
x = x + c.asn * c.asn * c.data;
|
||||
bt_assert(x = 36);
|
||||
}
|
||||
|
||||
bt_test_suite(t_clist, "Testing lists of communities");
|
||||
@ -1022,11 +1081,15 @@ eclist r;
|
||||
bt_assert((ro, 10.20.30.40, 100) !~ el);
|
||||
bt_assert(el !~ [(rt, 10, 35..40)]);
|
||||
bt_assert(el !~ [(ro, 10, *)]);
|
||||
bt_assert(el !~ []);
|
||||
|
||||
el = add(el, (rt, 10, 40));
|
||||
el2 = filter(el, [(rt, 10, 20..40)] );
|
||||
el2 = add(el2, (rt, 10, 50));
|
||||
|
||||
bt_assert(delete(el, []) = el);
|
||||
bt_assert(filter(el, []) = --empty--);
|
||||
|
||||
# eclist A (1,30,40)
|
||||
bt_assert(el = add(add(add(--empty--, (rt, 10, 1)), (rt, 10, 30)), (rt, 10, 40)));
|
||||
bt_assert(format(el) = "(eclist (rt, 10, 1) (rt, 10, 30) (rt, 10, 40))");
|
||||
@ -1060,6 +1123,13 @@ eclist r;
|
||||
bt_assert(format(r) = "(eclist (rt, 2, 1) (rt, 1, 3) (rt, 2, 2) (rt, 3, 1) (rt, 2, 3))");
|
||||
bt_assert(r.min = (rt, 1, 3));
|
||||
bt_assert(r.max = (rt, 3, 1));
|
||||
|
||||
# iteration over eclist
|
||||
int x = 0;
|
||||
for ec c in r do
|
||||
if c > (rt, 2, 0) && c < (rt, 3, 0) then
|
||||
x = x + 1;
|
||||
bt_assert(x = 3);
|
||||
}
|
||||
|
||||
bt_test_suite(t_eclist, "Testing lists of extended communities");
|
||||
@ -1144,6 +1214,9 @@ lclist r;
|
||||
ll2 = add(ll2, (30, 30, 30));
|
||||
ll2 = add(ll2, (40, 40, 40));
|
||||
|
||||
bt_assert(delete(ll, []) = ll);
|
||||
bt_assert(filter(ll, []) = ---empty---);
|
||||
|
||||
# lclist A (10, 20, 30)
|
||||
bt_assert(format(ll) = "(lclist (10, 10, 10) (20, 20, 20) (30, 30, 30))");
|
||||
|
||||
@ -1175,6 +1248,19 @@ lclist r;
|
||||
bt_assert(format(r) = "(lclist (2, 3, 3) (1, 2, 3) (2, 3, 1) (3, 1, 2) (2, 1, 3))");
|
||||
bt_assert(r.min = (1, 2, 3));
|
||||
bt_assert(r.max = (3, 1, 2));
|
||||
|
||||
# iteration over lclist
|
||||
int x = 0;
|
||||
int y = 0;
|
||||
lc mx = (0, 0, 0);
|
||||
for lc c in r do {
|
||||
int asn2 = c.asn * c.asn;
|
||||
x = x + asn2 * c.data1;
|
||||
y = y + asn2 * c.data2;
|
||||
if c > mx then mx = c;
|
||||
}
|
||||
bt_assert(x = 39 && y = 49);
|
||||
bt_assert(mx = r.max);
|
||||
}
|
||||
|
||||
bt_test_suite(t_lclist, "Testing lists of large communities");
|
||||
@ -1203,6 +1289,7 @@ lc set lls;
|
||||
bt_assert(ll !~ [(5,10,15), (10,21,30)]);
|
||||
bt_assert(ll !~ [(10,21..25,*)]);
|
||||
bt_assert(ll !~ [(11, *, *)]);
|
||||
bt_assert(ll !~ []);
|
||||
|
||||
lls = [(10, 10, 10), (20, 20, 15..25), (30, 30, *), (40, 35..45, *), (50, *, *), (55..65, *, *)];
|
||||
bt_assert(format(lls) = "[(10, 10, 10), (20, 20, 15)..(20, 20, 25), (30, 30, 0)..(30, 30, 4294967295), (40, 35, 0)..(40, 45, 4294967295), (50, 0, 0)..(50, 4294967295, 4294967295), (55, 0, 0)..(65, 4294967295, 4294967295)]");
|
||||
@ -1259,6 +1346,10 @@ bt_test_suite(t_rd, "Testing route distinguishers");
|
||||
function t_rd_set()
|
||||
rd set rds;
|
||||
{
|
||||
rds = [];
|
||||
bt_assert(rds = []);
|
||||
bt_assert(10:20 !~ rds);
|
||||
|
||||
rds = [10:20, 100000:100..100000:200];
|
||||
bt_assert(format(rds) = "[10:20, 100000:100..100000:200]");
|
||||
|
||||
@ -1269,6 +1360,7 @@ rd set rds;
|
||||
bt_assert(100000:128 ~ rds);
|
||||
bt_assert(100000:200 ~ rds);
|
||||
bt_assert(100010:150 !~ rds);
|
||||
bt_assert(100010:150 !~ []);
|
||||
}
|
||||
|
||||
bt_test_suite(t_rd_set, "Testing sets of route distinguishers");
|
||||
@ -1335,7 +1427,85 @@ function fifteen()
|
||||
return 15;
|
||||
}
|
||||
|
||||
function local_vars(int j)
|
||||
{
|
||||
int k = 10;
|
||||
bt_assert(j = 5 && k = 10);
|
||||
{
|
||||
int j = 15;
|
||||
k = 20;
|
||||
bt_assert(j = 15 && k = 20);
|
||||
}
|
||||
bt_assert(j = 5 && k = 20);
|
||||
|
||||
if j < 10 then
|
||||
{
|
||||
int j = 25;
|
||||
string k = "hello";
|
||||
bt_assert(j = 25 && k = "hello");
|
||||
}
|
||||
bt_assert(j = 5 && k = 20);
|
||||
|
||||
int m = 100;
|
||||
{
|
||||
j = 35;
|
||||
int k = 40;
|
||||
bt_assert(j = 35 && k = 40 && m = 100);
|
||||
}
|
||||
bt_assert(j = 35 && k = 20 && m = 100);
|
||||
}
|
||||
|
||||
function factorial(int x)
|
||||
{
|
||||
if x = 0 then return 0;
|
||||
if x = 1 then return 1;
|
||||
else return x * factorial(x - 1);
|
||||
}
|
||||
|
||||
function fibonacci(int x)
|
||||
{
|
||||
if x = 0 then return 0;
|
||||
if x = 1 then return 1;
|
||||
else return fibonacci(x - 1) + fibonacci(x - 2);
|
||||
}
|
||||
|
||||
function hanoi_init(int a; int b)
|
||||
{
|
||||
if b = 0
|
||||
then return +empty+;
|
||||
else return prepend(hanoi_init(a + 1, b - 1), a);
|
||||
}
|
||||
|
||||
function hanoi_solve(int n; bgppath h_src; bgppath h_dst; bgppath h_aux; bool x; bool y)
|
||||
{
|
||||
# x -> return src or dst
|
||||
# y -> print state
|
||||
|
||||
if n = 0 then { if x then return h_src; else return h_dst; }
|
||||
|
||||
bgppath tmp1 = hanoi_solve(n - 1, h_src, h_aux, h_dst, true, y);
|
||||
bgppath tmp2 = hanoi_solve(n - 1, h_src, h_aux, h_dst, false, false);
|
||||
h_src = tmp1;
|
||||
h_aux = tmp2;
|
||||
|
||||
int v = h_src.first;
|
||||
# bt_assert(h_dst = +empty+ || v < h_dst.first);
|
||||
h_src = delete(h_src, v);
|
||||
h_dst = prepend(h_dst, v);
|
||||
|
||||
if y then
|
||||
print "move: ", v, " src: ", h_src, " dst:", h_dst, " aux:", h_aux;
|
||||
|
||||
tmp1 = hanoi_solve(n - 1, h_aux, h_dst, h_src, true, y);
|
||||
tmp2 = hanoi_solve(n - 1, h_aux, h_dst, h_src, false, false);
|
||||
h_aux = tmp1;
|
||||
h_dst = tmp2;
|
||||
|
||||
if x then return h_src; else return h_dst;
|
||||
}
|
||||
|
||||
function t_call_function()
|
||||
bgppath h_src;
|
||||
{
|
||||
bt_assert(fifteen() = 15);
|
||||
|
||||
@ -1347,6 +1517,17 @@ function t_call_function()
|
||||
bt_assert(callme(4, 4) = 16);
|
||||
bt_assert(callme(7, 2) = 14);
|
||||
bt_assert(callmeagain(1, 2, 3) = 6);
|
||||
local_vars(5);
|
||||
|
||||
bt_assert(factorial(5) = 120);
|
||||
bt_assert(factorial(10) = 3628800);
|
||||
|
||||
bt_assert(fibonacci(10) = 55);
|
||||
bt_assert(fibonacci(20) = 6765);
|
||||
|
||||
h_src = hanoi_init(1, 6);
|
||||
bt_assert(format(h_src) = "(path 1 2 3 4 5 6)");
|
||||
bt_assert(hanoi_solve(6, h_src, +empty+, +empty+, false, false) = h_src);
|
||||
}
|
||||
|
||||
bt_test_suite(t_call_function, "Testing calling functions");
|
||||
@ -1592,13 +1773,16 @@ filter vpn_filter
|
||||
bt_assert(net.type != NET_IP6);
|
||||
bt_assert(net.rd = 0:1:2);
|
||||
|
||||
bool b = false;
|
||||
case (net.type) {
|
||||
NET_IP4: print "IPV4";
|
||||
NET_IP6: print "IPV6";
|
||||
else: b = true;
|
||||
}
|
||||
bt_assert(b);
|
||||
|
||||
bt_check_assign(from, 10.20.30.40);
|
||||
bt_check_assign(gw, 55.55.55.44);
|
||||
# bt_check_assign(gw, 55.55.55.44);
|
||||
|
||||
bgp_community.add((3,5));
|
||||
bgp_ext_community.add((ro, 135, 999));
|
||||
|
||||
41
lib/a-path.c
41
lib/a-path.c
@ -602,8 +602,10 @@ as_path_match_set(const struct adata *path, const struct f_tree *set)
|
||||
}
|
||||
|
||||
const struct adata *
|
||||
as_path_filter(struct linpool *pool, const struct adata *path, const struct f_tree *set, u32 key, int pos)
|
||||
as_path_filter(struct linpool *pool, const struct adata *path, const struct f_val *set, int pos)
|
||||
{
|
||||
ASSERT((set->type == T_SET) || (set->type == T_INT));
|
||||
|
||||
if (!path)
|
||||
return NULL;
|
||||
|
||||
@ -629,13 +631,13 @@ as_path_filter(struct linpool *pool, const struct adata *path, const struct f_tr
|
||||
u32 as = get_as(p);
|
||||
int match;
|
||||
|
||||
if (set)
|
||||
if (set->type == T_SET)
|
||||
{
|
||||
struct f_val v = { .type = T_INT, .val.i = as};
|
||||
match = !!find_tree(set, &v);
|
||||
match = !!find_tree(set->val.t, &v);
|
||||
}
|
||||
else
|
||||
match = (as == key);
|
||||
else /* T_INT */
|
||||
match = (as == set->val.i);
|
||||
|
||||
if (match == pos)
|
||||
{
|
||||
@ -667,6 +669,35 @@ as_path_filter(struct linpool *pool, const struct adata *path, const struct f_tr
|
||||
return res;
|
||||
}
|
||||
|
||||
int
|
||||
as_path_walk(const struct adata *path, uint *pos, uint *val)
|
||||
{
|
||||
if (!path)
|
||||
return 0;
|
||||
|
||||
const u8 *p = path->data;
|
||||
const u8 *q = p + path->length;
|
||||
uint n, x = *pos;
|
||||
|
||||
while (p < q)
|
||||
{
|
||||
n = p[1];
|
||||
p += 2;
|
||||
|
||||
if (x < n)
|
||||
{
|
||||
*val = get_as(p + x * BS);
|
||||
*pos += 1;
|
||||
return 1;
|
||||
}
|
||||
|
||||
p += n * BS;
|
||||
x -= n;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
struct pm_pos
|
||||
{
|
||||
|
||||
@ -12,6 +12,7 @@
|
||||
#include "nest/rt.h"
|
||||
#include "lib/attrs.h"
|
||||
#include "lib/resource.h"
|
||||
#include "filter/data.h"
|
||||
|
||||
#define TESTS_NUM 30
|
||||
#define AS_PATH_LENGTH 1000
|
||||
@ -127,8 +128,9 @@ t_path_include(void)
|
||||
int counts_of_contains = count_asn_in_array(as_nums, as_nums[i]);
|
||||
bt_assert_msg(as_path_contains(as_path, as_nums[i], counts_of_contains), "AS Path should contains %d-times number %d", counts_of_contains, as_nums[i]);
|
||||
|
||||
bt_assert(as_path_filter(tmp_linpool, as_path, NULL, as_nums[i], 0) != NULL);
|
||||
bt_assert(as_path_filter(tmp_linpool, as_path, NULL, as_nums[i], 1) != NULL);
|
||||
struct f_val v = { .type = T_INT, .val.i = as_nums[i] };
|
||||
bt_assert(as_path_filter(tmp_linpool, as_path, &v, 0) != NULL);
|
||||
bt_assert(as_path_filter(tmp_linpool, as_path, &v, 1) != NULL);
|
||||
}
|
||||
|
||||
for (i = 0; i < 10000; i++)
|
||||
|
||||
48
lib/a-set.c
48
lib/a-set.c
@ -693,3 +693,51 @@ lc_set_max(const struct adata *list, lcomm *val)
|
||||
*val = (lcomm) { res[0], res[1], res[2] };
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
int_set_walk(const struct adata *list, uint *pos, uint *val)
|
||||
{
|
||||
if (!list)
|
||||
return 0;
|
||||
|
||||
if (*pos >= (uint) int_set_get_size(list))
|
||||
return 0;
|
||||
|
||||
u32 *res = int_set_get_data(list) + *pos;
|
||||
*val = *res;
|
||||
*pos += 1;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
ec_set_walk(const struct adata *list, uint *pos, u64 *val)
|
||||
{
|
||||
if (!list)
|
||||
return 0;
|
||||
|
||||
if (*pos >= (uint) int_set_get_size(list))
|
||||
return 0;
|
||||
|
||||
u32 *res = int_set_get_data(list) + *pos;
|
||||
*val = ec_generic(res[0], res[1]);
|
||||
*pos += 2;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
lc_set_walk(const struct adata *list, uint *pos, lcomm *val)
|
||||
{
|
||||
if (!list)
|
||||
return 0;
|
||||
|
||||
if (*pos >= (uint) int_set_get_size(list))
|
||||
return 0;
|
||||
|
||||
u32 *res = int_set_get_data(list) + *pos;
|
||||
*val = (lcomm) { res[0], res[1], res[2] };
|
||||
*pos += 3;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
@ -60,6 +60,7 @@ static inline int adata_same(const struct adata *a, const struct adata *b)
|
||||
* to 16bit slot (like in 16bit AS_PATH). See RFC 4893 for details
|
||||
*/
|
||||
|
||||
struct f_val;
|
||||
struct f_tree;
|
||||
|
||||
int as_path_valid(byte *data, uint len, int bs, int sets, int confed, char *err, uint elen);
|
||||
@ -81,7 +82,8 @@ int as_path_get_last(const struct adata *path, u32 *last_as);
|
||||
u32 as_path_get_last_nonaggregated(const struct adata *path);
|
||||
int as_path_contains(const struct adata *path, u32 as, int min);
|
||||
int as_path_match_set(const struct adata *path, const struct f_tree *set);
|
||||
const struct adata *as_path_filter(struct linpool *pool, const struct adata *path, const struct f_tree *set, u32 key, int pos);
|
||||
const struct adata *as_path_filter(struct linpool *pool, const struct adata *path, const struct f_val *set, int pos);
|
||||
int as_path_walk(const struct adata *path, uint *pos, uint *val);
|
||||
|
||||
static inline struct adata *as_path_prepend(struct linpool *pool, const struct adata *path, u32 as)
|
||||
{ return as_path_prepend2(pool, path, AS_PATH_SEQUENCE, as); }
|
||||
@ -256,6 +258,9 @@ int lc_set_min(const struct adata *list, lcomm *val);
|
||||
int int_set_max(const struct adata *list, u32 *val);
|
||||
int ec_set_max(const struct adata *list, u64 *val);
|
||||
int lc_set_max(const struct adata *list, lcomm *val);
|
||||
int int_set_walk(const struct adata *list, uint *pos, u32 *val);
|
||||
int ec_set_walk(const struct adata *list, uint *pos, u64 *val);
|
||||
int lc_set_walk(const struct adata *list, uint *pos, lcomm *val);
|
||||
|
||||
void ec_set_sort_x(struct adata *set); /* Sort in place */
|
||||
|
||||
|
||||
@ -165,7 +165,7 @@ rtrid:
|
||||
|
||||
idval:
|
||||
NUM { $$ = $1; }
|
||||
| '(' term ')' { $$ = f_eval_int(f_linearize($2)); }
|
||||
| '(' term ')' { $$ = f_eval_int(f_linearize($2, 1)); }
|
||||
| IP4 { $$ = ip4_to_u32($1); }
|
||||
| CF_SYM_KNOWN {
|
||||
if ($1->class == (SYM_CONSTANT | T_INT) || $1->class == (SYM_CONSTANT | T_QUAD))
|
||||
@ -877,7 +877,7 @@ CF_CLI(DUMP FILTER ALL,,, [[Dump all filters in linearized form]])
|
||||
{ filters_dump_all(); cli_msg(0, ""); } ;
|
||||
|
||||
CF_CLI(EVAL, term, <expr>, [[Evaluate an expression]])
|
||||
{ cmd_eval(f_linearize($2)); } ;
|
||||
{ cmd_eval(f_linearize($2, 1)); } ;
|
||||
|
||||
CF_CLI_HELP(ECHO, ..., [[Control echoing of log messages]])
|
||||
CF_CLI(ECHO, echo_mask echo_size, (all | off | { debug|trace|info|remote|warning|error|auth [, ...] }) [<buffer-size>], [[Control echoing of log messages]]) {
|
||||
|
||||
@ -40,7 +40,7 @@ static_route_finish(void)
|
||||
if (net_type_match(this_srt->net, NB_DEST) == !this_srt->dest)
|
||||
cf_error("Unexpected or missing nexthop/type");
|
||||
|
||||
this_srt->cmds = f_linearize(this_srt_cmds);
|
||||
this_srt->cmds = f_linearize(this_srt_cmds, 0);
|
||||
}
|
||||
|
||||
CF_DECLS
|
||||
|
||||
@ -116,7 +116,7 @@ add_num_const(char *name, int val, const char *file, const uint line)
|
||||
struct f_val *v = cfg_alloc(sizeof(struct f_val));
|
||||
*v = (struct f_val) { .type = T_INT, .val.i = val };
|
||||
struct symbol *sym = cf_get_symbol(name);
|
||||
if (sym->class && (sym->scope == conf_this_scope))
|
||||
if (sym->class && cf_symbol_is_local(sym))
|
||||
cf_error("Error reading value for %s from %s:%d: already defined", name, file, line);
|
||||
|
||||
cf_define_symbol(sym, SYM_CONSTANT | T_INT, val, v);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user