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4324025f98
This adds support for dual-stack v4/v6 operation to the Babel protocol. Routing messages will be exchanged over IPv6, but IPv4 routes can be carried in the messages being exchanged. This matches how the reference Babel implementation (babeld) works. The nexthop address for v4 can be configured per interface, and will default to the first available IPv4 address on the given interface. For symmetry, a configuration option to configure the IPv6 nexthop address is also added. Thanks to Toke Høiland-Jørgensen <toke@toke.dk> for the patch.
135 lines
4.3 KiB
Plaintext
135 lines
4.3 KiB
Plaintext
/*
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* BIRD -- Babel Configuration
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*
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* Copyright (c) 2015-2016 Toke Hoiland-Jorgensen
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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/babel/babel.h"
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#include "nest/iface.h"
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CF_DEFINES
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#define BABEL_CFG ((struct babel_config *) this_proto)
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#define BABEL_IFACE ((struct babel_iface_config *) this_ipatt)
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CF_DECLS
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CF_KEYWORDS(BABEL, METRIC, RXCOST, HELLO, UPDATE, INTERVAL, PORT, WIRED,
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WIRELESS, RX, TX, BUFFER, LENGTH, CHECK, LINK, BABEL_METRIC, NEXT, HOP,
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IPV4, IPV6)
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CF_GRAMMAR
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CF_ADDTO(proto, babel_proto)
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babel_proto_start: proto_start BABEL
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{
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this_proto = proto_config_new(&proto_babel, $1);
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init_list(&BABEL_CFG->iface_list);
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};
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babel_proto_item:
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proto_item
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| proto_channel
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| INTERFACE babel_iface
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;
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babel_proto_opts:
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/* empty */
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| babel_proto_opts babel_proto_item ';'
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;
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babel_proto:
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babel_proto_start proto_name '{' babel_proto_opts '}';
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babel_iface_start:
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{
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this_ipatt = cfg_allocz(sizeof(struct babel_iface_config));
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add_tail(&BABEL_CFG->iface_list, NODE this_ipatt);
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init_list(&this_ipatt->ipn_list);
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BABEL_IFACE->port = BABEL_PORT;
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BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRED;
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BABEL_IFACE->tx_tos = IP_PREC_INTERNET_CONTROL;
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BABEL_IFACE->tx_priority = sk_priority_control;
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BABEL_IFACE->check_link = 1;
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};
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babel_iface_finish:
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{
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if (BABEL_IFACE->type == BABEL_IFACE_TYPE_WIRELESS)
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{
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if (!BABEL_IFACE->hello_interval)
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BABEL_IFACE->hello_interval = BABEL_HELLO_INTERVAL_WIRELESS;
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if (!BABEL_IFACE->rxcost)
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BABEL_IFACE->rxcost = BABEL_RXCOST_WIRELESS;
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}
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else
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{
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if (!BABEL_IFACE->hello_interval)
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BABEL_IFACE->hello_interval = BABEL_HELLO_INTERVAL_WIRED;
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if (!BABEL_IFACE->rxcost)
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BABEL_IFACE->rxcost = BABEL_RXCOST_WIRED;
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}
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/* Make sure we do not overflow the 16-bit centisec fields */
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if (!BABEL_IFACE->update_interval)
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BABEL_IFACE->update_interval = MIN_(BABEL_IFACE->hello_interval*BABEL_UPDATE_INTERVAL_FACTOR, BABEL_MAX_INTERVAL);
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BABEL_IFACE->ihu_interval = MIN_(BABEL_IFACE->hello_interval*BABEL_IHU_INTERVAL_FACTOR, BABEL_MAX_INTERVAL);
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};
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babel_iface_item:
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| PORT expr { BABEL_IFACE->port = $2; if (($2<1) || ($2>65535)) cf_error("Invalid port number"); }
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| RXCOST expr { BABEL_IFACE->rxcost = $2; if (($2<1) || ($2>65535)) cf_error("Invalid rxcost"); }
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| HELLO INTERVAL expr { BABEL_IFACE->hello_interval = $3; if (($3<1) || ($3>BABEL_MAX_INTERVAL)) cf_error("Invalid hello interval"); }
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| UPDATE INTERVAL expr { BABEL_IFACE->update_interval = $3; if (($3<1) || ($3>BABEL_MAX_INTERVAL)) cf_error("Invalid update interval"); }
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| TYPE WIRED { BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRED; }
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| TYPE WIRELESS { BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRELESS; }
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| RX BUFFER expr { BABEL_IFACE->rx_buffer = $3; if (($3<256) || ($3>65535)) cf_error("RX buffer must be in range 256-65535"); }
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| TX LENGTH expr { BABEL_IFACE->tx_length = $3; if (($3<256) || ($3>65535)) cf_error("TX length must be in range 256-65535"); }
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| TX tos { BABEL_IFACE->tx_tos = $2; }
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| TX PRIORITY expr { BABEL_IFACE->tx_priority = $3; }
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| CHECK LINK bool { BABEL_IFACE->check_link = $3; }
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| NEXT HOP IPV4 ipa { BABEL_IFACE->next_hop_ip4 = $4; if (!ipa_is_ip4($4)) cf_error("Must be an IPv4 address"); }
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| NEXT HOP IPV6 ipa { BABEL_IFACE->next_hop_ip6 = $4; if (!ipa_is_ip6($4)) cf_error("Must be an IPv6 address"); }
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;
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babel_iface_opts:
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/* empty */
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| babel_iface_opts babel_iface_item ';'
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;
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babel_iface_opt_list:
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/* empty */
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| '{' babel_iface_opts '}'
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;
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babel_iface:
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babel_iface_start iface_patt_list_nopx babel_iface_opt_list babel_iface_finish;
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CF_ADDTO(dynamic_attr, BABEL_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_BABEL_METRIC); })
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CF_CLI_HELP(SHOW BABEL, ..., [[Show information about Babel protocol]]);
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CF_CLI(SHOW BABEL INTERFACES, optsym opttext, [<name>] [\"<interface>\"], [[Show information about Babel interfaces]])
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{ babel_show_interfaces(proto_get_named($4, &proto_babel), $5); };
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CF_CLI(SHOW BABEL NEIGHBORS, optsym opttext, [<name>] [\"<interface>\"], [[Show information about Babel neighbors]])
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{ babel_show_neighbors(proto_get_named($4, &proto_babel), $5); };
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CF_CLI(SHOW BABEL ENTRIES, optsym opttext, [<name>], [[Show information about Babel prefix entries]])
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{ babel_show_entries(proto_get_named($4, &proto_babel)); };
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CF_CODE
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CF_END
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