mirror of
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139 lines
3.3 KiB
Plaintext
139 lines
3.3 KiB
Plaintext
/*
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* BIRD -- Aggregator configuration
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*
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* (c) 2023 Igor Putovny <igor.putovny@nic.cz>
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* (c) 2023 Maria Matejka <mq@ucw.cz>
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* (c) 2023 CZ.NIC z.s.p.o.
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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CF_HDR
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#include "proto/aggregator/aggregator.h"
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CF_DEFINES
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#define AGGREGATOR_CFG ((struct aggregator_config *) this_proto)
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#define AGGR_ITEM_ALLOC ((struct aggr_item_node *) cfg_allocz(sizeof(struct aggr_item_node)))
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CF_DECLS
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CF_KEYWORDS(AGGREGATOR, AGGREGATE, ON, MERGE, BY)
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%type <xp> aggr_item aggr_list
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CF_GRAMMAR
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proto: aggregator_proto ;
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aggregator_proto_start: proto_start AGGREGATOR
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{
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this_proto = proto_config_new(&proto_aggregator, $1);
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this_channel = AGGREGATOR_CFG->src = channel_config_new(NULL, "source", 0, this_proto);
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AGGREGATOR_CFG->dst = channel_config_new(NULL, "destination", 0, this_proto);
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AGGREGATOR_CFG->src->ra_mode = AGGREGATOR_CFG->dst->ra_mode = RA_ANY;
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};
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aggregator_proto_item:
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proto_item
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| channel_item_
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| PEER TABLE rtable { AGGREGATOR_CFG->dst->table = $3; }
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| AGGREGATE ON {
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if (AGGREGATOR_CFG->aggr_on)
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cf_error("Only one aggregate on clause allowed");
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cf_push_block_scope(new_config);
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} aggr_list {
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int count = new_config->current_scope->slots;
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cf_pop_block_scope(new_config);
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if (!AGGREGATOR_CFG->aggr_on_net)
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cf_error("aggregate on must be always include 'net'.");
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AGGREGATOR_CFG->aggr_on_count = count;
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AGGREGATOR_CFG->aggr_on = f_linearize($4.begin, count);
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struct f_line *premerge = f_linearize($4.end, 0);
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premerge->args = count;
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AGGREGATOR_CFG->premerge = premerge;
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}
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| MERGE BY {
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cf_push_block_scope(new_config);
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f_predefined_variable(new_config, "routes", T_ROUTES_BLOCK);
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} function_body {
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cf_pop_block_scope(new_config);
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$4->args++;
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AGGREGATOR_CFG->merge_by = $4;
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}
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;
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aggregator_proto_opts: /* empty */ | aggregator_proto_opts aggregator_proto_item ';' ;
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aggregator_proto: aggregator_proto_start proto_name '{' aggregator_proto_opts '}' ;
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aggr_list:
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aggr_item
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| aggr_list ',' aggr_item {
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if ($$.begin = $3.begin)
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$$.begin->next = $1.begin;
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else
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$$.begin = $1.begin;
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if ($$.end = $3.end)
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$$.end->next = $1.end;
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else
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$$.end = $1.end;
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}
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;
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aggr_item:
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'(' term ')' {
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switch ($2->type) {
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case T_INT:
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case T_BOOL:
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case T_PAIR:
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case T_QUAD:
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case T_ENUM:
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case T_IP:
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case T_EC:
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case T_LC:
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case T_RD:
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/* Fits, OK */
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break;
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default:
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cf_error("Expression evaluated to type %s unsupported by aggregator. Store this value as a custom attribute instead", f_type_name($2->type));
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}
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$$.begin = $2;
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$$.end = NULL;
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f_new_var(new_config->current_scope);
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}
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| lvalue {
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$$.begin = f_lval_getter(&$1);
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int vari = f_new_var(new_config->current_scope);
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if ($1.type == F_LVAL_SA && $1.sa.sa_code == SA_NET)
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AGGREGATOR_CFG->aggr_on_net = 1;
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if (($1.type == F_LVAL_CONSTANT) ||
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($1.type == F_LVAL_SA && $1.sa.readonly))
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$$.end = NULL;
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else
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{
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char varname[12];
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bsnprintf(varname, 12, "!aggr%d", vari);
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$$.end = f_lval_setter(&$1,
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f_new_inst(FI_VAR_GET, cf_define_symbol(
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new_config, cf_get_symbol(new_config, varname),
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SYM_VARIABLE | $$.begin->type, offset, vari
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)));
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}
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}
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;
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CF_CODE
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CF_END
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