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https://gitlab.nic.cz/labs/bird.git
synced 2024-09-16 18:35:19 +00:00
Filters now do not allow function (int arg; int arg2; ).
This commit is contained in:
Pavel Machek
parent
e5005be2b4
commit
6dc7a0cb39
10
bird.conf
10
bird.conf
@ -8,7 +8,9 @@ router id 62.168.0.1;
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define xyzzy = 120+10;
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function callme (int arg1; int arg2;)
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function callme ( int arg1; int arg2 )
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int local1;
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int local2;
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{
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print "Function callme called arguments " arg1 " and " arg2;
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@ -33,8 +35,8 @@ prefix px;
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if 1 <= 1 then printn "."; else { print "*** FAIL: test 3"; }
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if 1234 < 1234 then { print "*** FAIL: test 4"; quitbird; } else print "ok";
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print " data types; must be true: " 1.2.3.4 = 1.2.3.4 "," 1 ~ [1,2,3] "," 5 ~ [1..20] "," 2 ~ [ 1, 2, 3 ] "," 5 ~ [ 4 .. 7 ] "," 1.2.3.4 ~ [ 1.2.3.3..1.2.3.5 ];
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print " data types: must be false: " 1 ~ [ 2, 3, 4 ] "," 5 ~ [ 2, 3, 4, 7..11 ] "," 1.2.3.4 ~ [ 1.2.3.3, 1.2.3.5 ] "," (1,2) > (2,2) "," (1,1) > (1,1);
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print " data types; must be true: " 1.2.3.4 = 1.2.3.4 "," 1 ~ [1,2,3] "," 5 ~ [1..20] "," 2 ~ [ 1, 2, 3 ] "," 5 ~ [ 4 .. 7 ] "," 1.2.3.4 ~ [ 1.2.3.3..1.2.3.5 ] "," 1.2.3.4 ~ 1.2.3.4/8 "," 1.2.3.4/8 ~ 1.2.3.4/8 "," 1.2.3.4/8 ~ 1.2.3.4/8+ "," 1.2.3.4/16 ~ 1.2.3.4/8{ 15 , 16 };
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print " data types: must be false: " 1 ~ [ 2, 3, 4 ] "," 5 ~ [ 2, 3, 4, 7..11 ] "," 1.2.3.4 ~ [ 1.2.3.3, 1.2.3.5 ] "," (1,2) > (2,2) "," (1,1) > (1,1) "," 1.2.3.4/8 ~ 1.2.3.4/8- "," 1.2.3.4/17 ~ 1.2.3.4/8{ 15 , 16 };
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px = 1.2.3.4/18;
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print "Testing prefixes: 1.2.3.4/18 = " px;
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@ -60,6 +62,8 @@ int j;
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{
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print "Heya, filtering route to " rta.net.ip " prefixlen " rta.net.len;
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print "This route was from " rta.from;
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j = 7;
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j = 17;
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accept;
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}
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@ -6,11 +6,11 @@
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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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FIXME: define keyword
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FIXME: make px+, px- px^pair work in prefix sets
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FIXME: create ip.mask(x) function
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FIXME: whole system of paths, path ~ string, path.prepend(), path.originate
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FIXME: create community lists
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FIXME: access to dynamic attributes
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FIXME: local namespace for functions
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*/
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CF_HDR
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@ -30,18 +30,18 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, CONST,
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INT, BOOL, IP, PREFIX, PAIR, SET, STRING,
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IF, THEN, ELSE, CASE,
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TRUE, FALSE,
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RTA, FROM, GW, NET, MASK,
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RTA, FROM, GW, NET, MASK, RIP_METRIC, RIP_TAG,
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LEN,
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IMPOSSIBLE,
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FILTER
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)
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%type <x> term block cmds cmd function_body ifthen constant print_one print_list var_list
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%type <x> term block cmds cmd function_body ifthen constant print_one print_list var_list var_listn
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%type <f> filter filter_body
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%type <i> type break_command pair
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%type <e> set_item set_items switch_body
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%type <v> set_atom prefix prefix_s ipa
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%type <s> decls function_params
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%type <s> decls declsn one_decl function_params
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CF_GRAMMAR
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@ -71,11 +71,11 @@ type:
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}
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;
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decls: /* EMPTY */ { $$ = NULL; }
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| type SYM ';' decls {
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one_decl:
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type SYM {
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cf_define_symbol($2, SYM_VARIABLE | $1, NULL);
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printf( "New variable %s type %x\n", $2->name, $1 );
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$2->aux = $4;
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$2->aux = NULL;
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{
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struct f_val * val;
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val = cfg_alloc(sizeof(struct f_val));
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@ -86,6 +86,24 @@ decls: /* EMPTY */ { $$ = NULL; }
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}
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;
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/* Decls with ';' at the end */
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decls: /* EMPTY */ { $$ = NULL; }
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| one_decl ';' decls {
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$$ = $1;
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$$->aux = $3;
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}
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;
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/* Declarations that have no ';' at the end.
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Ouch, this is responsible for 13 or so shift/reduce conflicts. */
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declsn: one_decl { $$ = $1; }
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| declsn ';' one_decl {
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$$ = $3;
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$$->aux = $1;
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}
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;
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filter_body:
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function_body {
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struct filter *f = cfg_alloc(sizeof(struct filter));
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@ -104,7 +122,8 @@ filter:
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;
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function_params:
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'(' decls ')' { printf( "Have function parameters\n" ); $$=$2; }
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'(' declsn ')' { printf( "Have function parameters\n" ); $$=$2; }
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| '(' ')' { $$=NULL; }
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;
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function_body:
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@ -166,11 +185,11 @@ prefix:
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prefix_s { $$ = $1; }
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| prefix_s '+' { $$ = $1; $$.val.px.len |= LEN_PLUS; }
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| prefix_s '-' { $$ = $1; $$.val.px.len |= LEN_MINUS; }
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/* | prefix_s '{' NUM ',' NUM '}' How should this be done? */
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| prefix_s '{' NUM ',' NUM '}' { $$ = $1; $$.val.px.len |= LEN_RANGE | ($3 << 16) | ($5 << 8); }
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;
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ipa:
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IPA { $$.type = T_IP; $$.val.ip = $1; }
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IPA { $$.type = T_IP; $$.val.px.ip = $1; }
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;
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set_atom:
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@ -213,7 +232,8 @@ constant:
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| TEXT { $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_STRING; $$->a2.p = $1; }
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| pair { $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_PAIR; $$->a2.i = $1; }
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| ipa { NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; *val = $1; }
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| prefix_s {NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; *val = $1; }
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/* Replace with prefix_s to get rid of shift/reduce conflicts. */
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| prefix {NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; *val = $1; }
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| '[' set_items ']' { printf( "We've got a set here..." ); $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_SET; $$->a2.p = build_tree($2); printf( "ook\n" ); }
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;
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@ -245,7 +265,9 @@ term:
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| RTA '.' FROM { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_IP; $$->a2.i = OFFSETOF(struct rta, from); }
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| RTA '.' GW { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_IP; $$->a2.i = OFFSETOF(struct rta, gw); }
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| RTA '.' NET { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_PREFIX; $$->a2.i = 0x12345678; }
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| RTA '.' NET { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_PREFIX; $$->a2.i = 0x12345678; }
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| RTA '.' RIP_METRIC { $$ = f_new_inst(); $$->code = 'ea'; $$->a1.i = T_INT; $$->a2.i = EA_RIP_METRIC; }
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| term '.' IP { $$ = f_new_inst(); $$->code = 'cp'; $$->a1.p = $1; $$->a2.i = T_IP; }
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| term '.' LEN { $$ = f_new_inst(); $$->code = 'cp'; $$->a1.p = $1; $$->a2.i = T_INT; }
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@ -283,14 +305,14 @@ print_list: /* EMPTY */ { $$ = NULL; }
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}
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;
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var_list: term {
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var_listn: term {
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$$ = f_new_inst();
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$$->code = 's';
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$$->a1.p = NULL;
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$$->a2.p = $1;
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$$->next = NULL;
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}
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| term ',' var_list {
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| term ',' var_listn {
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$$ = f_new_inst();
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$$->code = 's';
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$$->a1.p = NULL;
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@ -299,6 +321,10 @@ var_list: term {
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}
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;
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var_list: /* EMPTY */ { $$ = NULL; }
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| var_listn { $$ = $1; }
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;
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cmd:
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ifthen {
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$$ = $1;
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@ -5,8 +5,6 @@
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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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* FIXME: local namespace for functions
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*
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* Notice that pair is stored as integer: first << 16 | second
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*/
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@ -70,16 +68,55 @@ val_compare(struct f_val v1, struct f_val v2)
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if (v1.val.i < v2.val.i) return -1;
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return 1;
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case T_IP:
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return ipa_compare(v1.val.ip, v2.val.ip);
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case T_PREFIX:
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return ipa_compare(v1.val.px.ip, v2.val.px.ip);
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default: { printf( "Error comparing\n" ); return CMP_ERROR; }
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}
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}
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int
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val_simple_in_range(struct f_val v1, struct f_val v2)
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{
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if ((v1.type == T_IP) && (v2.type == T_PREFIX))
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return !(ipa_compare(ipa_and(v2.val.px.ip, ipa_mkmask(v2.val.px.len)), ipa_and(v1.val.px.ip, ipa_mkmask(v2.val.px.len))));
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if ((v1.type == T_PREFIX) && (v2.type == T_PREFIX)) {
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ip_addr mask;
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if (v1.val.px.len & (LEN_PLUS | LEN_MINUS | LEN_RANGE))
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return CMP_ERROR;
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mask = ipa_mkmask( v2.val.px.len & LEN_MASK );
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if (ipa_compare(ipa_and(v2.val.px.ip, mask), ipa_and(v1.val.px.ip, mask)))
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return 0;
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/* FIXME: read rpsl or better ask mj: is it really like this? */
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if ((v2.val.px.len & LEN_MINUS) && (v1.val.px.len <= (v2.val.px.len & LEN_MASK)))
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return 0;
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if ((v2.val.px.len & LEN_PLUS) && (v1.val.px.len < (v2.val.px.len & LEN_MASK)))
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return 0;
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if ((v2.val.px.len & LEN_RANGE) && ((v1.val.px.len < (0xff & (v2.val.px.len >> 16)))
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|| (v1.val.px.len > (0xff & (v2.val.px.len >> 8)))))
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return 0;
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return 1;
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}
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return CMP_ERROR;
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}
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int
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val_in_range(struct f_val v1, struct f_val v2)
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{
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if (((v1.type == T_INT) || (v1.type == T_IP)) && (v2.type == T_SET))
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return !! find_tree(v2.val.t, v1);
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int res;
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res = val_simple_in_range(v1, v2);
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if (res != CMP_ERROR)
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return res;
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if (((v1.type == T_INT) || (v1.type == T_IP)) && (v2.type == T_SET)) {
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struct f_tree *n;
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n = find_tree(v2.val.t, v1);
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if (!n)
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return 0;
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return !! (val_simple_in_range(v1, n->from)); /* We turn CMP_ERROR into compared ok, and that's fine */
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}
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return CMP_ERROR;
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}
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@ -108,7 +145,7 @@ val_print(struct f_val v)
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case T_BOOL: PRINTF( v.val.i ? "TRUE" : "FALSE" ); break;
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case T_INT: PRINTF( "%d ", v.val.i ); break;
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case T_STRING: PRINTF( "%s", v.val.s ); break;
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case T_IP: PRINTF( "%I", v.val.ip ); break;
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case T_IP: PRINTF( "%I", v.val.px.ip ); break;
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case T_PREFIX: PRINTF( "%I/%d", v.val.px.ip, v.val.px.len ); break;
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case T_PAIR: PRINTF( "(%d,%d)", v.val.i >> 16, v.val.i & 0xffff ); break;
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case T_SET: tree_print( v.val.t ); PRINTF( "\n" ); break;
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@ -254,7 +291,7 @@ interpret(struct f_inst *what)
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res.type = what->a1.i;
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switch(res.type) {
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case T_IP:
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res.val.ip = * (ip_addr *) ((char *) rta + what->a2.i);
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res.val.px.ip = * (ip_addr *) ((char *) rta + what->a2.i);
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break;
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case T_PREFIX: /* Warning: this works only for prefix of network */
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{
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@ -267,6 +304,9 @@ interpret(struct f_inst *what)
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}
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}
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break;
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case 'ea': /* Access to extended attributes [hmm, but we need it read/write, do we?] */
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bug( "Implement me" );
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break;
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case 'cp': /* Convert prefix to ... */
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ONEARG;
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if (v1.type != T_PREFIX)
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@ -274,7 +314,7 @@ interpret(struct f_inst *what)
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res.type = what->a2.i;
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switch(res.type) {
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case T_INT: res.val.i = v1.val.px.len; break;
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case T_IP: res.val.ip = v1.val.px.ip; break;
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case T_IP: res.val.px.ip = v1.val.px.ip; break;
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default: bug( "Unknown prefix to conversion\n" );
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}
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break;
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@ -32,17 +32,17 @@ struct prefix {
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ip_addr ip;
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int len;
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#define LEN_MASK 0xff
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#define LEN_PLUS 0x10000
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#define LEN_MINUS 0x20000
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#define LEN_RANGE 0x40000
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/* If range then prefix must be in range (len >> 8 & 0xff, len & 0xff) */
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#define LEN_PLUS 0x1000000
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#define LEN_MINUS 0x2000000
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#define LEN_RANGE 0x4000000
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/* If range then prefix must be in range (len >> 16 & 0xff, len >> 8 & 0xff) */
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};
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struct f_val {
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int type;
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union {
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int i;
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ip_addr ip;
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/* ip_addr ip; Folded into prefix */
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struct prefix px;
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char *s;
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struct f_tree *t;
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