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Lexer now returns known sym / unknown sym / keyword

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This commit is contained in:
Maria Matejka 2019-05-17 22:18:49 +02:00
parent fe503c7c06
commit 9eef9c648c
5 changed files with 108 additions and 74 deletions
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24
conf/cf-lex.l
View file

@ -654,6 +654,14 @@ cf_default_name(char *template, int *counter)
static enum yytokentype
cf_lex_symbol(const char *data)
{
/* Have we defined such a symbol? */
struct symbol *sym = cf_get_symbol(data);
cf_lval.s = sym;
if (sym->class != SYM_VOID)
return CF_SYM_KNOWN;
/* Is it a keyword? */
struct keyword *k = HASH_FIND(kw_hash, KW, data);
if (k)
{
@ -666,19 +674,9 @@ cf_lex_symbol(const char *data)
}
}
cf_lval.s = cf_get_symbol(data);
switch (cf_lval.s->class) {
case SYM_VOID: return CF_SYM_VOID;
case SYM_PROTO: return CF_SYM_PROTO;
case SYM_TEMPLATE: return CF_SYM_TEMPLATE;
case SYM_FUNCTION: return CF_SYM_FUNCTION;
case SYM_FILTER: return CF_SYM_FILTER;
case SYM_TABLE: return CF_SYM_TABLE;
case SYM_ATTRIBUTE: return CF_SYM_ATTRIBUTE;
case SYM_VARIABLE_RANGE: return CF_SYM_VARIABLE;
case SYM_CONSTANT_RANGE: return CF_SYM_CONSTANT;
default: bug("Unknown symbol class %d", cf_lval.s->class);
}
/* OK, undefined symbol */
cf_lval.s = sym;
return CF_SYM_UNDEFINED;
}
static void

62
conf/confbase.Y
View file

@ -33,6 +33,21 @@ check_u16(uint val)
cf_error("Value %u out of range (0-65535)", val);
}
#define cf_assert(cond, ...) do { if (!(cond)) cf_error(__VA_ARGS__); } while (0)
static inline void cf_assert_symbol(const struct symbol *sym, uint class) {
switch (class) {
case SYM_PROTO: cf_assert(sym->class == SYM_PROTO, "Protocol name required"); break;
case SYM_TEMPLATE: cf_assert(sym->class == SYM_TEMPLATE, "Protocol template name required"); break;
case SYM_FUNCTION: cf_assert(sym->class == SYM_FUNCTION, "Function name required"); break;
case SYM_FILTER: cf_assert(sym->class == SYM_FILTER, "Filter name required"); break;
case SYM_TABLE: cf_assert(sym->class == SYM_TABLE, "Table name required"); break;
case SYM_ATTRIBUTE: cf_assert(sym->class == SYM_ATTRIBUTE, "Custom attribute name required"); break;
case SYM_VARIABLE: cf_assert((sym->class & ~0xff) == SYM_VARIABLE, "Variable name required"); break;
case SYM_CONSTANT: cf_assert((sym->class & ~0xff) == SYM_CONSTANT, "Constant name required"); break;
default: bug("This shall not happen");
}
}
CF_DECLS
%union {
@ -82,7 +97,7 @@ CF_DECLS
%token <ip4> IP4
%token <ip6> IP6
%token <i64> VPN_RD
%token <s> CF_SYM_VOID CF_SYM_PROTO CF_SYM_TEMPLATE CF_SYM_FUNCTION CF_SYM_FILTER CF_SYM_TABLE CF_SYM_ATTRIBUTE CF_SYM_VARIABLE CF_SYM_CONSTANT
%token <s> CF_SYM_KNOWN CF_SYM_UNDEFINED
%token <t> TEXT
%type <iface> ipa_scope
@ -92,6 +107,7 @@ CF_DECLS
%type <net> net_ip4_ net_ip6_ net_ip6 net_ip_ net_ip net_or_ipa
%type <net_ptr> net_ net_any net_vpn4_ net_vpn6_ net_vpn_ net_roa4_ net_roa6_ net_roa_ net_ip6_sadr_ net_mpls_
%type <mls> label_stack_start label_stack
%type <s> CF_SYM_VOID
%type <t> text opttext
%type <s> symbol
@ -104,6 +120,8 @@ CF_DECLS
%left '!'
%nonassoc '.'
%start config
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, S, MS, US, PORT, VPN, MPLS, FROM)
CF_GRAMMAR
@ -137,8 +155,8 @@ definition:
expr:
NUM
| '(' term ')' { $$ = f_eval_int(f_postfixify($2)); }
| CF_SYM_CONSTANT {
if ($1->class != (SYM_CONSTANT | T_INT)) cf_error("Number expected");
| CF_SYM_KNOWN {
if ($1->class != (SYM_CONSTANT | T_INT)) cf_error("Number constant expected");
$$ = SYM_VAL($1).i; }
;
@ -148,17 +166,9 @@ expr_us:
| expr US { $$ = $1 US_; }
;
symbol:
CF_SYM_VOID
| CF_SYM_PROTO
| CF_SYM_TEMPLATE
| CF_SYM_FUNCTION
| CF_SYM_FILTER
| CF_SYM_TABLE
| CF_SYM_ATTRIBUTE
| CF_SYM_VARIABLE
| CF_SYM_CONSTANT
;
CF_SYM_VOID: CF_SYM_UNDEFINED ;
symbol: CF_SYM_VOID | CF_SYM_KNOWN ;
/* Switches */
@ -177,8 +187,8 @@ bool:
ipa:
IP4 { $$ = ipa_from_ip4($1); }
| IP6 { $$ = ipa_from_ip6($1); }
| CF_SYM_CONSTANT {
if ($1->class != (SYM_CONSTANT | T_IP)) cf_error("IP address expected");
| CF_SYM_KNOWN {
if ($1->class != (SYM_CONSTANT | T_IP)) cf_error("IP address constant expected");
$$ = SYM_VAL($1).ip;
}
;
@ -292,27 +302,27 @@ net_:
net_ip6:
net_ip6_
| CF_SYM_CONSTANT {
| CF_SYM_KNOWN {
if (($1->class != (SYM_CONSTANT | T_NET)) || (SYM_VAL($1).net->type != NET_IP6))
cf_error("IPv6 network expected");
cf_error("IPv6 network constant expected");
$$ = * SYM_VAL($1).net;
}
;
net_ip:
net_ip_
| CF_SYM_CONSTANT {
| CF_SYM_KNOWN {
if (($1->class != (SYM_CONSTANT | T_NET)) || !net_is_ip(SYM_VAL($1).net))
cf_error("IP network expected");
cf_error("IP network constant expected");
$$ = * SYM_VAL($1).net;
}
;
net_any:
net_
| CF_SYM_CONSTANT {
| CF_SYM_KNOWN {
if ($1->class != (SYM_CONSTANT | T_NET))
cf_error("Network expected");
cf_error("Network constant expected");
$$ = (net_addr *) SYM_VAL($1).net; /* Avoid const warning */
}
;
@ -322,13 +332,13 @@ net_or_ipa:
| net_ip6_
| IP4 { net_fill_ip4(&($$), $1, IP4_MAX_PREFIX_LENGTH); }
| IP6 { net_fill_ip6(&($$), $1, IP6_MAX_PREFIX_LENGTH); }
| CF_SYM_CONSTANT {
| CF_SYM_KNOWN {
if ($1->class == (SYM_CONSTANT | T_IP))
net_fill_ip_host(&($$), SYM_VAL($1).ip);
else if (($1->class == (SYM_CONSTANT | T_NET)) && net_is_ip(SYM_VAL($1).net))
$$ = * SYM_VAL($1).net;
else
cf_error("IP address or network expected");
cf_error("IP address or network constant expected");
}
;
@ -359,8 +369,8 @@ time:
text:
TEXT
| CF_SYM_CONSTANT {
if ($1->class != (SYM_CONSTANT | T_STRING)) cf_error("String expected");
| CF_SYM_KNOWN {
if ($1->class != (SYM_CONSTANT | T_STRING)) cf_error("String constant expected");
$$ = SYM_VAL($1).s;
}
;

51
filter/config.Y
View file

@ -489,7 +489,8 @@ custom_attr: ATTRIBUTE type CF_SYM_VOID ';' {
conf: bt_test_suite ;
bt_test_suite:
BT_TEST_SUITE '(' CF_SYM_FUNCTION ',' text ')' {
BT_TEST_SUITE '(' CF_SYM_KNOWN ',' text ')' {
cf_assert_symbol($3, SYM_FUNCTION);
struct f_bt_test_suite *t = cfg_allocz(sizeof(struct f_bt_test_suite));
t->fn = $3->function;
t->fn_name = $3->name;
@ -501,7 +502,9 @@ bt_test_suite:
conf: bt_test_same ;
bt_test_same:
BT_TEST_SAME '(' CF_SYM_FUNCTION ',' CF_SYM_FUNCTION ',' NUM ')' {
BT_TEST_SAME '(' CF_SYM_KNOWN ',' CF_SYM_KNOWN ',' NUM ')' {
cf_assert_symbol($3, SYM_FUNCTION);
cf_assert_symbol($5, SYM_FUNCTION);
struct f_bt_test_suite *t = cfg_allocz(sizeof(struct f_bt_test_suite));
t->fn = $3->function;
t->cmp = $5->function;
@ -589,7 +592,8 @@ filter_body:
;
filter:
CF_SYM_FILTER {
CF_SYM_KNOWN {
cf_assert_symbol($1, SYM_FILTER);
$$ = $1->filter;
}
| filter_body {
@ -699,7 +703,8 @@ set_atom:
if (f_eval(f_postfixify($2), cfg_mem, &($$)) > F_RETURN) cf_error("Runtime error");
if (!f_valid_set_type($$.type)) cf_error("Set-incompatible type");
}
| CF_SYM_CONSTANT {
| CF_SYM_KNOWN {
cf_assert_symbol($1, SYM_CONSTANT);
if (!f_valid_set_type(SYM_TYPE($1))) cf_error("%s: set-incompatible type", $1->name);
$$ = *$1->val;
}
@ -858,15 +863,25 @@ constructor:
function_call:
CF_SYM_FUNCTION '(' var_list ')' {
CF_SYM_KNOWN '(' var_list ')' {
$$ = f_new_inst(FI_CALL, $1, $3);
}
;
symbol_value:
CF_SYM_CONSTANT { $$ = f_new_inst(FI_VARIABLE, $1); }
| CF_SYM_VARIABLE { $$ = f_new_inst(FI_VARIABLE, $1); }
| CF_SYM_ATTRIBUTE { $$ = f_new_inst(FI_EA_GET, *$1->attribute); }
symbol_value: CF_SYM_KNOWN
{
switch ($1->class) {
case SYM_CONSTANT_RANGE:
case SYM_VARIABLE_RANGE:
$$ = f_new_inst(FI_VARIABLE, $1);
break;
case SYM_ATTRIBUTE:
$$ = f_new_inst(FI_EA_GET, *$1->attribute);
break;
default:
cf_error("Can't get value of symbol %s", $1->name);
}
}
;
static_attr:
@ -993,11 +1008,17 @@ cmd:
| IF term THEN block ELSE block {
$$ = f_new_inst(FI_CONDITION, $2, $4, $6);
}
| CF_SYM_ATTRIBUTE '=' term ';' {
$$ = f_new_inst(FI_EA_SET, $3, *$1->attribute);
}
| CF_SYM_VARIABLE '=' term ';' {
$$ = f_new_inst(FI_SET, $3, $1);
| CF_SYM_KNOWN '=' term ';' {
switch ($1->class) {
case SYM_VARIABLE_RANGE:
$$ = f_new_inst(FI_SET, $3, $1);
break;
case SYM_ATTRIBUTE:
$$ = f_new_inst(FI_EA_SET, $3, *$1->attribute);
break;
default:
cf_error("Can't assign to symbol %s", $1->name);
}
}
| RETURN term ';' {
DBG( "Ook, we'll return the value\n" );
@ -1038,7 +1059,7 @@ get_cf_position:
};
lvalue:
CF_SYM_VARIABLE { $$ = (struct f_lval) { .type = F_LVAL_VARIABLE, .sym = $1 }; }
CF_SYM_KNOWN { cf_assert_symbol($1, SYM_VARIABLE); $$ = (struct f_lval) { .type = F_LVAL_VARIABLE, .sym = $1 }; }
| PREFERENCE { $$ = (struct f_lval) { .type = F_LVAL_PREFERENCE }; }
| static_attr { $$ = (struct f_lval) { .type = F_LVAL_SA, .sa = $1 }; }
| dynamic_attr { $$ = (struct f_lval) { .type = F_LVAL_EA, .da = $1 }; };

43
nest/config.Y
View file

@ -88,7 +88,7 @@ CF_ENUM(T_ENUM_ROA, ROA_, UNKNOWN, VALID, INVALID)
%type <i32> idval
%type <f> imexport
%type <r> rtable
%type <s> optproto sym_proto_or_template
%type <s> optproto
%type <ra> r_args
%type <sd> sym_args
%type <i> proto_start echo_mask echo_size debug_mask debug_list debug_flag mrtdump_mask mrtdump_list mrtdump_flag export_mode limit_action net_type table_sorted tos password_algorithm
@ -114,7 +114,7 @@ idval:
NUM { $$ = $1; }
| '(' term ')' { $$ = f_eval_int(f_postfixify($2)); }
| IP4 { $$ = ip4_to_u32($1); }
| CF_SYM_CONSTANT {
| CF_SYM_KNOWN {
if ($1->class == (SYM_CONSTANT | T_INT) || $1->class == (SYM_CONSTANT | T_QUAD))
$$ = SYM_VAL($1).i;
else if (($1->class == (SYM_CONSTANT | T_IP)) && ipa_is_ip4(SYM_VAL($1).ip))
@ -173,8 +173,6 @@ proto_start:
| TEMPLATE { $$ = SYM_TEMPLATE; }
;
sym_proto_or_template: CF_SYM_PROTO | CF_SYM_TEMPLATE ;
proto_name:
/* EMPTY */ {
struct symbol *s = cf_default_name(this_proto->protocol->template, &this_proto->protocol->name_counter);
@ -186,20 +184,22 @@ proto_name:
cf_define_symbol($1, this_proto->class, proto, this_proto);
this_proto->name = $1->name;
}
| FROM sym_proto_or_template {
| FROM CF_SYM_KNOWN {
if (($2->class != SYM_TEMPLATE) && ($2->class != SYM_PROTO)) cf_error("Template or protocol name expected");
struct symbol *s = cf_default_name(this_proto->protocol->template, &this_proto->protocol->name_counter);
s->class = this_proto->class;
s->proto = this_proto;
this_proto->name = s->name;
if (($2->class != SYM_TEMPLATE) && ($2->class != SYM_PROTO)) cf_error("Template or protocol name expected");
proto_copy_config(this_proto, $2->proto);
}
| CF_SYM_VOID FROM sym_proto_or_template {
| CF_SYM_VOID FROM CF_SYM_KNOWN {
if (($3->class != SYM_TEMPLATE) && ($3->class != SYM_PROTO)) cf_error("Template or protocol name expected");
cf_define_symbol($1, this_proto->class, proto, this_proto);
this_proto->name = $1->name;
if (($3->class != SYM_TEMPLATE) && ($3->class != SYM_PROTO)) cf_error("Template or protocol name expected");
proto_copy_config(this_proto, $3->proto);
}
;
@ -256,7 +256,7 @@ channel_end:
proto_channel: channel_start channel_opt_list channel_end;
rtable: CF_SYM_TABLE { $$ = $1->table; } ;
rtable: CF_SYM_KNOWN { cf_assert_symbol($1, SYM_TABLE); $$ = $1->table; } ;
imexport:
FILTER filter { $$ = $2; }
@ -510,7 +510,7 @@ CF_CLI(SHOW PROTOCOLS ALL, proto_patt2, [<protocol> | \"<pattern>\"], [[Show rou
{ proto_apply_cmd($4, proto_cmd_show, 0, 1); } ;
optproto:
CF_SYM_PROTO
CF_SYM_KNOWN { cf_assert_symbol($1, SYM_PROTO); $$ = $1; }
| /* empty */ { $$ = NULL; }
;
@ -542,7 +542,8 @@ r_args:
$$->show_for = 1;
$$->addr = $3;
}
| r_args TABLE CF_SYM_TABLE {
| r_args TABLE CF_SYM_KNOWN {
cf_assert_symbol($3, SYM_TABLE);
$$ = $1;
rt_show_add_table($$, $3->table->table);
$$->tables_defined_by = RSD_TDB_DIRECT;
@ -554,7 +555,8 @@ r_args:
rt_show_add_table($$, t->table);
$$->tables_defined_by = RSD_TDB_ALL;
}
| r_args IMPORT TABLE CF_SYM_PROTO '.' r_args_channel {
| r_args IMPORT TABLE CF_SYM_KNOWN '.' r_args_channel {
cf_assert_symbol($4, SYM_PROTO);
$$ = $1;
struct proto_config *cf = $4->proto;
if (!cf->proto) cf_error("%s is not a protocol", $4->name);
@ -586,7 +588,8 @@ r_args:
$$ = $1;
$$->filtered = 1;
}
| r_args export_mode CF_SYM_PROTO {
| r_args export_mode CF_SYM_KNOWN {
cf_assert_symbol($3, SYM_PROTO);
struct proto_config *c = (struct proto_config *) $3->proto;
$$ = $1;
if ($$->export_mode) cf_error("Export specified twice");
@ -595,7 +598,8 @@ r_args:
$$->export_protocol = c->proto;
$$->tables_defined_by = RSD_TDB_INDIRECT;
}
| r_args export_mode CF_SYM_PROTO '.' r_args_channel {
| r_args export_mode CF_SYM_KNOWN '.' r_args_channel {
cf_assert_symbol($3, SYM_PROTO);
struct proto_config *c = (struct proto_config *) $3->proto;
$$ = $1;
if ($$->export_mode) cf_error("Export specified twice");
@ -605,7 +609,8 @@ r_args:
if (!$$->export_channel) cf_error("Export channel not found");
$$->tables_defined_by = RSD_TDB_INDIRECT;
}
| r_args PROTOCOL CF_SYM_PROTO {
| r_args PROTOCOL CF_SYM_KNOWN {
cf_assert_symbol($3, SYM_PROTO);
struct proto_config *c = (struct proto_config *) $3->proto;
$$ = $1;
if ($$->show_protocol) cf_error("Protocol specified twice");
@ -643,7 +648,7 @@ r_args_for:
$$ = cfg_alloc(sizeof(net_addr_ip6_sadr));
net_fill_ip6_sadr($$, $1, IP6_MAX_PREFIX_LENGTH, $3, IP6_MAX_PREFIX_LENGTH);
}
| CF_SYM_CONSTANT {
| CF_SYM_KNOWN {
if ($1->class == (SYM_CONSTANT | T_IP))
{
$$ = cfg_alloc(ipa_is_ip4(SYM_VAL($1).ip) ? sizeof(net_addr_ip4) : sizeof(net_addr_ip6));
@ -652,7 +657,7 @@ r_args_for:
else if (($1->class == (SYM_CONSTANT | T_NET)) && net_type_match(SYM_VAL($1).net, NB_IP | NB_VPN))
$$ = (net_addr *) SYM_VAL($1).net; /* Avoid const warning */
else
cf_error("IP address or network expected");
cf_error("IP address or network constant expected");
}
;
@ -775,13 +780,13 @@ CF_CLI(RESTRICT,,,[[Restrict current CLI session to safe commands]])
{ this_cli->restricted = 1; cli_msg(16, "Access restricted"); } ;
proto_patt:
CF_SYM_PROTO { $$.ptr = $1; $$.patt = 0; }
CF_SYM_KNOWN { cf_assert_symbol($1, SYM_PROTO); $$.ptr = $1; $$.patt = 0; }
| ALL { $$.ptr = NULL; $$.patt = 1; }
| TEXT { $$.ptr = $1; $$.patt = 1; }
;
proto_patt2:
CF_SYM_PROTO { $$.ptr = $1; $$.patt = 0; }
CF_SYM_KNOWN { cf_assert_symbol($1, SYM_PROTO); $$.ptr = $1; $$.patt = 0; }
| { $$.ptr = NULL; $$.patt = 1; }
| TEXT { $$.ptr = $1; $$.patt = 1; }
;

2
proto/ospf/config.Y
View file

@ -544,7 +544,7 @@ lsadb_args:
| lsadb_args LSID idval { $$ = $1; $$->lsid = $3; }
| lsadb_args SELF { $$ = $1; $$->router = SH_ROUTER_SELF; }
| lsadb_args ROUTER idval { $$ = $1; $$->router = $3; }
| lsadb_args CF_SYM_PROTO { $$ = $1; $$->proto = (struct ospf_proto *) proto_get_named($2, &proto_ospf); }
| lsadb_args CF_SYM_KNOWN { cf_assert_symbol($2, SYM_PROTO); $$ = $1; $$->proto = (struct ospf_proto *) proto_get_named($2, &proto_ospf); }
;
CF_CODE