70fab17837
When a Babel node restarts, it loses its sequence number, which can cause its routes to be rejected by peers until the state is cleared out by other nodes in the network (which can take on the order of minutes). There are two ways to fix this: Having stable storage to keep the sequence number across restarts, or picking a different router ID each time. This implements the latter, by introducing a new option that will cause BIRD to randomize a high 32 bits of router ID every time it starts up. This avoids the problem at the cost of not having stable router IDs in the network. Thanks to Toke Hoiland-Jorgensen for the patch.
146 lines
5 KiB
Text
146 lines
5 KiB
Text
/*
|
|
* BIRD -- Babel Configuration
|
|
*
|
|
* Copyright (c) 2015-2016 Toke Hoiland-Jorgensen
|
|
* (c) 2016--2017 Ondrej Zajicek <santiago@crfreenet.org>
|
|
* (c) 2016--2017 CZ.NIC z.s.p.o.
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
|
|
|
|
CF_HDR
|
|
|
|
#include "proto/babel/babel.h"
|
|
#include "nest/iface.h"
|
|
|
|
CF_DEFINES
|
|
|
|
#define BABEL_CFG ((struct babel_config *) this_proto)
|
|
#define BABEL_IFACE ((struct babel_iface_config *) this_ipatt)
|
|
|
|
CF_DECLS
|
|
|
|
CF_KEYWORDS(BABEL, INTERFACE, METRIC, RXCOST, HELLO, UPDATE, INTERVAL, PORT,
|
|
TYPE, WIRED, WIRELESS, RX, TX, BUFFER, PRIORITY, LENGTH, CHECK, LINK,
|
|
NEXT, HOP, IPV4, IPV6, BABEL_METRIC, SHOW, INTERFACES, NEIGHBORS,
|
|
ENTRIES, RANDOMIZE, ROUTER, ID)
|
|
|
|
CF_GRAMMAR
|
|
|
|
CF_ADDTO(proto, babel_proto)
|
|
|
|
babel_proto_start: proto_start BABEL
|
|
{
|
|
this_proto = proto_config_new(&proto_babel, $1);
|
|
init_list(&BABEL_CFG->iface_list);
|
|
BABEL_CFG->hold_time = 1 S_;
|
|
};
|
|
|
|
babel_proto_item:
|
|
proto_item
|
|
| proto_channel
|
|
| INTERFACE babel_iface
|
|
| RANDOMIZE ROUTER ID bool { BABEL_CFG->randomize_router_id = $4; }
|
|
;
|
|
|
|
babel_proto_opts:
|
|
/* empty */
|
|
| babel_proto_opts babel_proto_item ';'
|
|
;
|
|
|
|
babel_proto:
|
|
babel_proto_start proto_name '{' babel_proto_opts '}';
|
|
|
|
|
|
babel_iface_start:
|
|
{
|
|
this_ipatt = cfg_allocz(sizeof(struct babel_iface_config));
|
|
add_tail(&BABEL_CFG->iface_list, NODE this_ipatt);
|
|
init_list(&this_ipatt->ipn_list);
|
|
BABEL_IFACE->port = BABEL_PORT;
|
|
BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRED;
|
|
BABEL_IFACE->limit = BABEL_HELLO_LIMIT;
|
|
BABEL_IFACE->tx_tos = IP_PREC_INTERNET_CONTROL;
|
|
BABEL_IFACE->tx_priority = sk_priority_control;
|
|
BABEL_IFACE->check_link = 1;
|
|
};
|
|
|
|
|
|
babel_iface_finish:
|
|
{
|
|
if (BABEL_IFACE->type == BABEL_IFACE_TYPE_WIRELESS)
|
|
{
|
|
if (!BABEL_IFACE->hello_interval)
|
|
BABEL_IFACE->hello_interval = BABEL_HELLO_INTERVAL_WIRELESS;
|
|
if (!BABEL_IFACE->rxcost)
|
|
BABEL_IFACE->rxcost = BABEL_RXCOST_WIRELESS;
|
|
}
|
|
else
|
|
{
|
|
if (!BABEL_IFACE->hello_interval)
|
|
BABEL_IFACE->hello_interval = BABEL_HELLO_INTERVAL_WIRED;
|
|
if (!BABEL_IFACE->rxcost)
|
|
BABEL_IFACE->rxcost = BABEL_RXCOST_WIRED;
|
|
}
|
|
|
|
/* Make sure we do not overflow the 16-bit centisec fields */
|
|
if (!BABEL_IFACE->update_interval)
|
|
BABEL_IFACE->update_interval = MIN_(BABEL_IFACE->hello_interval*BABEL_UPDATE_INTERVAL_FACTOR, BABEL_MAX_INTERVAL);
|
|
BABEL_IFACE->ihu_interval = MIN_(BABEL_IFACE->hello_interval*BABEL_IHU_INTERVAL_FACTOR, BABEL_MAX_INTERVAL);
|
|
|
|
BABEL_CFG->hold_time = MAX_(BABEL_CFG->hold_time, BABEL_IFACE->update_interval*BABEL_HOLD_TIME_FACTOR);
|
|
};
|
|
|
|
|
|
babel_iface_item:
|
|
| PORT expr { BABEL_IFACE->port = $2; if (($2<1) || ($2>65535)) cf_error("Invalid port number"); }
|
|
| RXCOST expr { BABEL_IFACE->rxcost = $2; if (($2<1) || ($2>65535)) cf_error("Invalid rxcost"); }
|
|
| LIMIT expr { BABEL_IFACE->limit = $2; if (($2<1) || ($2>16)) cf_error("Limit must be in range 1-16"); }
|
|
| TYPE WIRED { BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRED; }
|
|
| TYPE WIRELESS { BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRELESS; }
|
|
| HELLO INTERVAL expr_us { BABEL_IFACE->hello_interval = $3; if (($3<BABEL_MIN_INTERVAL) || ($3>BABEL_MAX_INTERVAL)) cf_error("Hello interval must be in range 10 ms - 655 s"); }
|
|
| UPDATE INTERVAL expr_us { BABEL_IFACE->update_interval = $3; if (($3<BABEL_MIN_INTERVAL) || ($3>BABEL_MAX_INTERVAL)) cf_error("Update interval must be in range 10 ms - 655 s"); }
|
|
| RX BUFFER expr { BABEL_IFACE->rx_buffer = $3; if (($3<256) || ($3>65535)) cf_error("RX buffer must be in range 256-65535"); }
|
|
| TX LENGTH expr { BABEL_IFACE->tx_length = $3; if (($3<256) || ($3>65535)) cf_error("TX length must be in range 256-65535"); }
|
|
| TX tos { BABEL_IFACE->tx_tos = $2; }
|
|
| TX PRIORITY expr { BABEL_IFACE->tx_priority = $3; }
|
|
| CHECK LINK bool { BABEL_IFACE->check_link = $3; }
|
|
| NEXT HOP IPV4 ipa { BABEL_IFACE->next_hop_ip4 = $4; if (!ipa_is_ip4($4)) cf_error("Must be an IPv4 address"); }
|
|
| NEXT HOP IPV6 ipa { BABEL_IFACE->next_hop_ip6 = $4; if (!ipa_is_ip6($4)) cf_error("Must be an IPv6 address"); }
|
|
;
|
|
|
|
babel_iface_opts:
|
|
/* empty */
|
|
| babel_iface_opts babel_iface_item ';'
|
|
;
|
|
|
|
babel_iface_opt_list:
|
|
/* empty */
|
|
| '{' babel_iface_opts '}'
|
|
;
|
|
|
|
|
|
babel_iface:
|
|
babel_iface_start iface_patt_list_nopx babel_iface_opt_list babel_iface_finish;
|
|
|
|
CF_ADDTO(dynamic_attr, BABEL_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_BABEL_METRIC); })
|
|
|
|
CF_CLI_HELP(SHOW BABEL, ..., [[Show information about Babel protocol]]);
|
|
|
|
CF_CLI(SHOW BABEL INTERFACES, optsym opttext, [<name>] [\"<interface>\"], [[Show information about Babel interfaces]])
|
|
{ babel_show_interfaces(proto_get_named($4, &proto_babel), $5); };
|
|
|
|
CF_CLI(SHOW BABEL NEIGHBORS, optsym opttext, [<name>] [\"<interface>\"], [[Show information about Babel neighbors]])
|
|
{ babel_show_neighbors(proto_get_named($4, &proto_babel), $5); };
|
|
|
|
CF_CLI(SHOW BABEL ENTRIES, optsym opttext, [<name>], [[Show information about Babel prefix entries]])
|
|
{ babel_show_entries(proto_get_named($4, &proto_babel)); };
|
|
|
|
CF_CLI(SHOW BABEL ROUTES, optsym opttext, [<name>], [[Show information about Babel route entries]])
|
|
{ babel_show_routes(proto_get_named($4, &proto_babel)); };
|
|
|
|
CF_CODE
|
|
|
|
CF_END
|