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135 lines
3.2 KiB
Plaintext
135 lines
3.2 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, PEER, AGGREGATE, ON, MERGE, BY)
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%type <ai> 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 aggr_list {
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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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bool net_present = 0;
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int count = 0;
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for (const struct aggr_item_node *item = $3; item; item = item->next) {
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// log(L_WARN "type %d sacode %d", item->i.type, item->i.sa.sa_code);
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if (item->i.type == AGGR_ITEM_STATIC_ATTR && item->i.sa.sa_code == SA_NET)
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net_present = 1;
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count++;
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}
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if (!net_present)
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cf_error("'NET' must be present");
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AGGREGATOR_CFG->aggr_on = cfg_alloc(sizeof(struct aggr_item) * count);
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int pos = 0;
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for (const struct aggr_item_node *item = $3; item; item = item->next) {
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if (item->i.type == AGGR_ITEM_DYNAMIC_ATTR)
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AGGREGATOR_CFG->aggr_on_da_count++;
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AGGREGATOR_CFG->aggr_on[pos++] = item->i;
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}
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AGGREGATOR_CFG->aggr_on_count = pos;
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}
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| MERGE BY {
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cf_push_block_scope(new_config);
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cf_create_symbol(new_config, "routes", SYM_VARIABLE | T_ROUTES_BLOCK, offset, f_new_var(sym_->scope));
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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 ($3 == NULL) {
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$$ = $1;
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} else {
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$$ = $3;
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$$->next = $1;
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}
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}
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;
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aggr_item:
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'(' term ')' {
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$$ = AGGR_ITEM_ALLOC;
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$$->i.type = AGGR_ITEM_TERM;
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$$->i.line = f_linearize($2, 1);
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}
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| CF_SYM_KNOWN {
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switch ($1->class) {
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case SYM_ATTRIBUTE:
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$$ = AGGR_ITEM_ALLOC;
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$$->i.type = AGGR_ITEM_DYNAMIC_ATTR;
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$$->i.da = *$1->attribute;
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break;
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case SYM_CONSTANT_RANGE:
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$$ = NULL;
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break;
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default:
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cf_error("Can't aggregate on symbol type %s.", cf_symbol_class_name($1));
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}
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}
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| dynamic_attr {
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$$ = AGGR_ITEM_ALLOC;
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$$->i.type = AGGR_ITEM_DYNAMIC_ATTR;
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$$->i.da = $1;
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}
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| static_attr {
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$$ = AGGR_ITEM_ALLOC;
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$$->i.type = AGGR_ITEM_STATIC_ATTR;
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$$->i.sa = $1;
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}
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;
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CF_CODE
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CF_END
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