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Allows to define constants of all filter types.

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This commit is contained in:
Ondrej Zajicek 2013-07-25 22:33:57 +02:00
parent ac57451348
commit 1103b32e83
6 changed files with 62 additions and 71 deletions
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19
conf/cf-lex.l
View file

@ -15,10 +15,10 @@
* symbols and keywords.
*
* Each symbol is represented by a &symbol structure containing name
* of the symbol, its lexical scope, symbol class (%SYM_PROTO for a name of a protocol,
* %SYM_NUMBER for a numeric constant etc.) and class dependent data.
* When an unknown symbol is encountered, it's automatically added to the
* symbol table with class %SYM_VOID.
* of the symbol, its lexical scope, symbol class (%SYM_PROTO for a
* name of a protocol, %SYM_CONSTANT for a constant etc.) and class
* dependent data. When an unknown symbol is encountered, it's
* automatically added to the symbol table with class %SYM_VOID.
*
* The keyword tables are generated from the grammar templates
* using the |gen_keywords.m4| script.
@ -623,24 +623,23 @@ cf_walk_symbols(struct config *cf, struct symbol *sym, int *pos)
char *
cf_symbol_class_name(struct symbol *sym)
{
if ((sym->class & 0xff00) == SYM_CONSTANT)
return "constant";
switch (sym->class)
{
case SYM_VOID:
return "undefined";
case SYM_PROTO:
return "protocol";
case SYM_NUMBER:
return "numeric constant";
case SYM_TEMPLATE:
return "protocol template";
case SYM_FUNCTION:
return "function";
case SYM_FILTER:
return "filter";
case SYM_TABLE:
return "routing table";
case SYM_IPA:
return "network address";
case SYM_TEMPLATE:
return "protocol template";
case SYM_ROA:
return "ROA table";
default:

10
conf/conf.h
View file

@ -110,15 +110,17 @@ struct symbol {
/* Remember to update cf_symbol_class_name() */
#define SYM_VOID 0
#define SYM_PROTO 1
#define SYM_NUMBER 2
#define SYM_TEMPLATE 2
#define SYM_FUNCTION 3
#define SYM_FILTER 4
#define SYM_TABLE 5
#define SYM_IPA 6
#define SYM_TEMPLATE 7
#define SYM_ROA 8
#define SYM_ROA 6
#define SYM_VARIABLE 0x100 /* 0x100-0x1ff are variable types */
#define SYM_CONSTANT 0x200 /* 0x200-0x2ff are variable types */
#define SYM_TYPE(s) (((struct f_val *) (s)->def)->type)
#define SYM_VAL(s) (((struct f_val *) (s)->def)->val)
struct include_file_stack {
void *buffer; /* Internal lexer state */

31
conf/confbase.Y
View file

@ -103,28 +103,29 @@ conf_entries:
CF_ADDTO(conf, ';')
/* Constant expressions */
CF_ADDTO(conf, definition)
definition:
DEFINE SYM '=' term ';' {
struct f_val *val = cfg_alloc(sizeof(struct f_val));
*val = f_eval($4, cfg_mem);
if (val->type == T_RETURN) cf_error("Runtime error");
cf_define_symbol($2, SYM_CONSTANT | val->type, val);
}
;
expr:
NUM
| '(' term ')' { $$ = f_eval_int($2); }
| SYM { if ($1->class != SYM_NUMBER) cf_error("Number expected"); else $$ = $1->aux; }
| SYM {
if ($1->class != (SYM_CONSTANT | T_INT)) cf_error("Number expected");
$$ = SYM_VAL($1).i; }
;
/* expr_u16: expr { check_u16($1); $$ = $1; }; */
CF_ADDTO(conf, definition)
definition:
DEFINE SYM '=' expr ';' {
cf_define_symbol($2, SYM_NUMBER, NULL);
$2->aux = $4;
}
| DEFINE SYM '=' IPA ';' {
cf_define_symbol($2, SYM_IPA, cfg_alloc(sizeof(ip_addr)));
*(ip_addr *)$2->def = $4;
}
;
/* Switches */
bool:
@ -141,8 +142,8 @@ bool:
ipa:
IPA
| SYM {
if ($1->class != SYM_IPA) cf_error("IP address expected");
$$ = *(ip_addr *)$1->def;
if ($1->class != (SYM_CONSTANT | T_IP)) cf_error("IP address expected");
$$ = SYM_VAL($1).px.ip;
}
;

47
filter/config.Y
View file

@ -193,7 +193,14 @@ f_generate_ec(u16 kind, struct f_inst *tk, struct f_inst *tv)
else if (tk->code == 'C') {
c1 = 1;
struct f_val *val = tk->a1.p;
if (val->type == T_IP) {
if (val->type == T_INT) {
ipv4_used = 0; key = val->val.i;
}
else if (val->type == T_QUAD) {
ipv4_used = 1; key = val->val.i;
}
else if (val->type == T_IP) {
ipv4_used = 1; key = ipa_to_u32(val->val.px.ip);
}
else
@ -661,37 +668,15 @@ function_call:
symbol:
SYM {
$$ = f_new_inst();
switch ($1->class) {
case SYM_NUMBER:
$$ = f_new_inst();
$$->code = 'c';
$$->aux = T_INT;
$$->a2.i = $1->aux;
break;
case SYM_IPA:
{ NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; val->type = T_IP; val->val.px.ip = * (ip_addr *) ($1->def); }
break;
case SYM_VARIABLE | T_BOOL:
case SYM_VARIABLE | T_INT:
case SYM_VARIABLE | T_PAIR:
case SYM_VARIABLE | T_QUAD:
case SYM_VARIABLE | T_EC:
case SYM_VARIABLE | T_STRING:
case SYM_VARIABLE | T_IP:
case SYM_VARIABLE | T_PREFIX:
case SYM_VARIABLE | T_PREFIX_SET:
case SYM_VARIABLE | T_SET:
case SYM_VARIABLE | T_PATH:
case SYM_VARIABLE | T_PATH_MASK:
case SYM_VARIABLE | T_CLIST:
case SYM_VARIABLE | T_ECLIST:
$$->code = 'V';
$$->a1.p = $1->def;
$$->a2.p = $1->name;
break;
default:
cf_error("%s: variable expected.", $1->name );
switch ($1->class & 0xff00) {
case SYM_CONSTANT: $$->code = 'C'; break;
case SYM_VARIABLE: $$->code = 'V'; break;
default: cf_error("%s: variable expected.", $1->name);
}
$$->a1.p = $1->def;
$$->a2.p = $1->name;
}
static_attr:

19
filter/test.conf
View file

@ -240,6 +240,15 @@ int b;
print "Defined: ", a, " ", b, " ", defined(b);
}
define is1 = [ one, (2+1), (6-one), 8, 11, 15, 17, 19];
define is2 = [(17+2), 17, 15, 11, 8, 5, 3, 2];
define is3 = [5, 17, 2, 11, 8, 15, 3, 19];
define pxs2 = [ 10.0.0.0/16{8,12}, 20.0.0.0/16{24,28} ];
define ecs2 = [(rt, ten, (one+onef(0))*10), (ro, 100000, 100..200), (rt, 12345, *)];
function __startup()
int i;
bool b;
@ -249,9 +258,6 @@ pair pp;
quad qq;
ec cc;
int set is;
int set is1;
int set is2;
int set is3;
pair set ps;
ec set ecs;
prefix set pxs;
@ -279,11 +285,6 @@ string s;
print " must be true: ", defined(1), ",", defined(1.2.3.4), ",", 1 != 2, ",", 1 <= 2;
print " data types: must be false: ", 1 ~ [ 2, 3, 4 ], ",", 5 ~ is, ",", 1.2.3.4 ~ [ 1.2.3.3, 1.2.3.5 ], ",", (1,2) > (2,2), ",", (1,1) > (1,1), ",", 1.0.0.0/9 ~ [ 1.0.0.0/8- ], ",", 1.2.0.0/17 ~ [ 1.0.0.0/8{ 15 , 16 } ], ",", true && false;
is1 = [ 1, 5, 8, 11, 15, 17, 19];
is1 = [ one, (2+1), (6-one), 8, 11, 15, 17, 19];
is2 = [(17+2), 17, 15, 11, 8, 5, 3, 2];
is3 = [5, 17, 2, 11, 8, 15, 3, 19];
print " must be true: ", 1 ~ is1, " ", 3 ~ is1, " ", 5 ~ is1;
print " must be true: ", (one+2) ~ is1, " ", 2 ~ is2, " ", 2 ~ is3;
@ -333,6 +334,7 @@ string s;
ecs = [(rt, ten, (one+onef(0))*10), (ro, 100000, 100..200), (rt, 12345, *)];
print "EC set: ", ecs;
print "EC set: ", ecs2;
print "Testing EC set, true: ", (rt, 10, 20) ~ ecs, " ", (ro, 100000, 100) ~ ecs, " ", (ro, 100000, 200) ~ ecs,
" ", (rt, 12345, 0) ~ ecs, " ", cc ~ ecs, " ", (rt, 12345, 4000000) ~ ecs;
print "Testing EC set, false: ", (ro, 10, 20) ~ ecs, " ", (rt, 10, 21) ~ ecs, " ", (ro, 100000, 99) ~ ecs,
@ -354,6 +356,7 @@ string s;
print " must be false: ", 1.1.0.0/16 ~ pxs, ",", 1.3.0.0/16 ~ pxs, ",", 1.2.0.0/15 ~ pxs, ",", 1.2.0.0/17 ~ pxs, ",",
1.2.0.0/32 ~ pxs, ",", 1.4.0.0/15 ~ pxs;
test_pxset(pxs2);
test_pxset([ 10.0.0.0/16{8,12}, 20.0.0.0/16{24,28} ]);
print "What will this do? ", [ 1, 2, 1, 1, 1, 3, 4, 1, 1, 1, 5 ];

7
sysdep/unix/main.c
View file

@ -97,9 +97,10 @@ static inline void
add_num_const(char *name, int val)
{
struct symbol *s = cf_find_symbol(name);
s->class = SYM_NUMBER;
s->def = NULL;
s->aux = val;
s->class = SYM_CONSTANT | T_INT;
s->def = cfg_allocz(sizeof(struct f_val));
SYM_TYPE(s) = T_INT;
SYM_VAL(s).i = val;
}
/* the code of read_iproute_table() is based on