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bird/proto/snmp/config.Y

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/*
* BIRD -- Statistics Protocol Configuration
*
* (c) 2022 Vojtech Vilimek <vojtech.vilimek@nic.cz>
* (c) 2022 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "proto/snmp/snmp.h"
#include "proto/snmp/subagent.h"
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CF_DEFINES
#define SNMP_CFG ((struct snmp_config *) this_proto)
CF_DECLS
CF_KEYWORDS(SNMP, PROTOCOL, BGP, LOCAL, AS, REMOTE, ADDRESS, PORT, DESCRIPTION,
TIMEOUT, PRIORITY, CONTEXT, DEFAULT, MESSAGE, VERBOSE)
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CF_GRAMMAR
proto: snmp_proto ;
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snmp_proto:
snmp_proto_start proto_name '{' snmp_proto_opts '}' ;
snmp_proto_item:
proto_item
| snmp_bgp_bond
| LOCAL PORT expr {
if (($3 < 1) || ($3 > 65535)) cf_error("Invalid port number");
SNMP_CFG->local_port = $3;
}
| REMOTE PORT expr {
if (($3 < 1) || ($3 > 65535)) cf_error("Invalid port number");
SNMP_CFG->remote_port = $3;
}
| LOCAL ID IP4 { SNMP_CFG->bgp_local_id = $3; }
| LOCAL ADDRESS IP4 { SNMP_CFG->local_ip = $3; }
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| REMOTE ADDRESS DEFAULT {
if (SNMP_CFG->trans_type != SNMP_TRANS_DEFAULT)
cf_error("Duplicit option remote address");
}
| REMOTE ADDRESS ipa {
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if (SNMP_CFG->trans_type != SNMP_TRANS_DEFAULT)
cf_error("Duplicit option remote address");
SNMP_CFG->remote_ip = $3;
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SNMP_CFG->trans_type = SNMP_TRANS_TCP;
}
| REMOTE ADDRESS text {
if (SNMP_CFG->trans_type != SNMP_TRANS_DEFAULT)
cf_error("Duplicit option remote address");
if (strcmp($3, agentx_master_addr)) {
SNMP_CFG->remote_path = $3;
SNMP_CFG->trans_type = SNMP_TRANS_UNIX;
}
}
| LOCAL AS expr {
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if ($3 < 1 || $3 > UINT16_MAX) cf_error("Invalid local AS");
SNMP_CFG->bgp_local_as = $3;
}
| SNMP DESCRIPTION text {
if (strlen($3) > UINT16_MAX - 1) cf_error("Description is too long");
SNMP_CFG->description = $3;
}
| PRIORITY expr {
if ($2 > 255) cf_error("Registration priority must be in range 0-255");
SNMP_CFG->priority = $2;
}
| MESSAGE TIMEOUT expr_us {
/* TODO */
if ($3 TO_S > 255 || $3 TO_S < 1)
log(L_WARN "resolution of AgentX message timeout is from 1 to 255 s.");
if (($3 TO_S) - (int)($3 TO_S) > 0)
log(L_WARN "AgentX message timeout cannot use second fraction, "
"will use rounded up value.");
SNMP_CFG->timeout = $3;
}
/*
| ERROR TIMEOUT expr_us {
/ * TODO * /
SNMP_CFG->error_timeout = $3;
}
*/
| START DELAY TIME expr_us { SNMP_CFG->startup_delay = $4; }
| VERBOSE bool { SNMP_CFG->verbose = $2; }
;
snmp_proto_opts:
/* empty */
| snmp_proto_opts snmp_proto_item ';'
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;
snmp_proto_start: proto_start SNMP
{
this_proto = proto_config_new(&proto_snmp, $1);
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init_list(&SNMP_CFG->bgp_entries);
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SNMP_CFG->bonds = 0;
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SNMP_CFG->local_ip = IP4_NONE;
SNMP_CFG->remote_ip = IPA_NONE;
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SNMP_CFG->remote_path = agentx_master_addr;
SNMP_CFG->trans_type = SNMP_TRANS_DEFAULT;
SNMP_CFG->bgp_local_id = IP4_NONE;
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SNMP_CFG->local_port = 0;
SNMP_CFG->remote_port = 705;
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SNMP_CFG->bgp_local_as = 0;
SNMP_CFG->verbose = 0;
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SNMP_CFG->description = "bird";
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SNMP_CFG->timeout = 15;
SNMP_CFG->priority = AGENTX_PRIORITY;
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}
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snmp_bgp_bond: BGP symbol
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{
/* the snmp_context rule sets the correct value of this_bond */
cf_assert_symbol($2, SYM_PROTO);
if (!$2->proto) cf_error("BGP protocol %s not found", $2->name);
cf_assert($2->proto->protocol == &proto_bgp,
"SNMP BGP bond accepts only BGP protocols");
struct bgp_config *bgp_config = SKIP_BACK(struct bgp_config, c, $2->proto);
if (!ipa_is_ip4(bgp_config->remote_ip))
cf_error("BGP4-MIB does not support IPv6 addresses.");
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struct snmp_bond *this_bond = cfg_alloc(sizeof(struct snmp_bond));
this_bond->type = SNMP_BGP;
this_bond->config = $2->proto;
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add_tail(&SNMP_CFG->bgp_entries, &this_bond->n);
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SNMP_CFG->bonds++;
}
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CF_CODE
CF_END