212 lines
7.6 KiB
Plaintext
212 lines
7.6 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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* (c) 2016--2017 Ondrej Zajicek <santiago@crfreenet.org>
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* (c) 2016--2017 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/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, INTERFACE, METRIC, RXCOST, HELLO, UPDATE, INTERVAL, PORT,
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TYPE, WIRED, WIRELESS, TUNNEL, RX, TX, BUFFER, PRIORITY, LENGTH, CHECK,
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LINK, NEXT, HOP, IPV4, IPV6, BABEL_METRIC, SHOW, INTERFACES, NEIGHBORS,
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ENTRIES, RANDOMIZE, ROUTER, ID, AUTHENTICATION, NONE, MAC, PERMISSIVE,
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RTT, MIN, MAX, DECAY, WINLEN, SEND, TIMESTAMPS)
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CF_GRAMMAR
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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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BABEL_CFG->hold_time = 1 S_;
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BABEL_CFG->metric_decay = BABEL_SMOOTHING_DECAY;
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};
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babel_proto_finish:
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{
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if (BABEL_CFG->metric_decay)
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BABEL_CFG->smooth_recp = BABEL_SMOOTHING_UNIT + BABEL_SMOOTHING_CONSTANT / BABEL_CFG->metric_decay;
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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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| RANDOMIZE ROUTER ID bool { BABEL_CFG->randomize_router_id = $4; }
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| METRIC DECAY expr_us { BABEL_CFG->metric_decay = $3; if ($3 && (($3 < BABEL_SMOOTHING_STEP) || ($3 > BABEL_SMOOTHING_DECAY_MAX))) cf_error("Metric decay must be 0, or between 1-180s"); }
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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 '}' babel_proto_finish;
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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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reset_passwords();
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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->limit = BABEL_HELLO_LIMIT;
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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->rtt_min = BABEL_RTT_MIN;
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BABEL_IFACE->rtt_max = BABEL_RTT_MAX;
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BABEL_IFACE->rtt_win_len = BABEL_RTT_WINLEN;
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BABEL_IFACE->rtt_send = 1;
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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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if (BABEL_IFACE->type == BABEL_IFACE_TYPE_TUNNEL && !BABEL_IFACE->rtt_cost)
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BABEL_IFACE->rtt_cost = BABEL_RXCOST_RTT;
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}
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if (BABEL_IFACE->rtt_cost && !BABEL_IFACE->rtt_send)
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cf_error("Can't set RTT cost when sending timestamps is disabled");
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if (BABEL_IFACE->rtt_min >= BABEL_IFACE->rtt_max)
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cf_error("Min RTT must be smaller than max RTT");
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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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BABEL_CFG->hold_time = MAX_(BABEL_CFG->hold_time, BABEL_IFACE->update_interval*BABEL_HOLD_TIME_FACTOR);
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BABEL_IFACE->passwords = get_passwords();
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if (!BABEL_IFACE->auth_type != !BABEL_IFACE->passwords)
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cf_error("Authentication and password options should be used together");
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if (BABEL_IFACE->passwords)
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{
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struct password_item *pass;
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uint len = 0, i = 0;
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WALK_LIST(pass, *BABEL_IFACE->passwords)
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{
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/* Set default crypto algorithm (HMAC-SHA256) */
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if (!pass->alg)
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pass->alg = ALG_HMAC_SHA256;
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if (!((pass->alg & ALG_HMAC) ||
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(pass->alg == ALG_BLAKE2S_128) ||
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(pass->alg == ALG_BLAKE2S_256) ||
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(pass->alg == ALG_BLAKE2B_256) ||
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(pass->alg == ALG_BLAKE2B_512)))
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cf_error("Only HMAC and Blake2 algorithms are supported");
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len += mac_type_length(pass->alg);
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i++;
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}
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BABEL_IFACE->mac_num_keys = i;
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BABEL_IFACE->mac_total_len = len;
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}
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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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| LIMIT expr { BABEL_IFACE->limit = $2; if (($2<1) || ($2>16)) cf_error("Limit must be in range 1-16"); }
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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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| TYPE TUNNEL { BABEL_IFACE->type = BABEL_IFACE_TYPE_TUNNEL; }
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| 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"); }
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| 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"); }
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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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| AUTHENTICATION NONE { BABEL_IFACE->auth_type = BABEL_AUTH_NONE; }
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| AUTHENTICATION MAC { BABEL_IFACE->auth_type = BABEL_AUTH_MAC; BABEL_IFACE->auth_permissive = 0; }
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| AUTHENTICATION MAC PERMISSIVE { BABEL_IFACE->auth_type = BABEL_AUTH_MAC; BABEL_IFACE->auth_permissive = 1; }
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| RTT MIN expr_us { BABEL_IFACE->rtt_min = $3; }
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| RTT MAX expr_us { BABEL_IFACE->rtt_max = $3; }
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| RTT COST expr { BABEL_IFACE->rtt_cost = $3; if ($3 >= BABEL_INFINITY) cf_error("RTT cost must be < 65535"); }
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| RTT WINLEN expr { BABEL_IFACE->rtt_win_len = $3; if (($3 < 1) || ($3 > 65535)) cf_error("RTT winlen must be between 1-65535"); }
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| SEND TIMESTAMPS bool { BABEL_IFACE->rtt_send = $3; }
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| password_list
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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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dynamic_attr: BABEL_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT, 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, optproto opttext, [<name>] [\"<interface>\"], [[Show information about Babel interfaces]])
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{ PROTO_WALK_CMD($4, &proto_babel, p) babel_show_interfaces(p, $5); };
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CF_CLI(SHOW BABEL NEIGHBORS, optproto opttext, [<name>] [\"<interface>\"], [[Show information about Babel neighbors]])
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{ PROTO_WALK_CMD($4, &proto_babel, p) babel_show_neighbors(p, $5); };
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CF_CLI(SHOW BABEL ENTRIES, optproto opttext, [<name>], [[Show information about Babel prefix entries]])
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{ PROTO_WALK_CMD($4, &proto_babel, p) babel_show_entries(p); };
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CF_CLI(SHOW BABEL ROUTES, optproto opttext, [<name>], [[Show information about Babel route entries]])
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{ PROTO_WALK_CMD($4, &proto_babel, p) babel_show_routes(p); };
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CF_CODE
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CF_END
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