2a95e63343
The patch implements Default Router Preferences and More-Specific Routes (RFC 4191) for RAdv protocol, allowing to announce router preference and more specific routes in router advertisements. Routes can be exported to RAdv like to regular routing protocols. Some cleanups, bugfixes and other changes done by Ondrej Zajicek.
324 lines
9.6 KiB
Text
324 lines
9.6 KiB
Text
/*
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* BIRD -- Router Advertisement Configuration
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*
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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/radv/radv.h"
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CF_DEFINES
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#define RADV_CFG ((struct radv_config *) this_proto)
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#define RADV_IFACE ((struct radv_iface_config *) this_ipatt)
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#define RADV_PREFIX this_radv_prefix
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#define RADV_RDNSS (&this_radv_rdnss)
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#define RADV_DNSSL (&this_radv_dnssl)
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static struct radv_prefix_config *this_radv_prefix;
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static struct radv_rdnss_config this_radv_rdnss;
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static struct radv_dnssl_config this_radv_dnssl;
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static list radv_dns_list; /* Used by radv_rdnss and radv_dnssl */
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static u8 radv_mult_val; /* Used by radv_mult for second return value */
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CF_DECLS
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CF_KEYWORDS(RADV, PREFIX, INTERFACE, MIN, MAX, RA, DELAY, INTERVAL,
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MANAGED, OTHER, CONFIG, LINGER, LINK, MTU, REACHABLE, TIME, RETRANS,
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TIMER, CURRENT, HOP, LIMIT, DEFAULT, VALID, PREFERRED, MULT,
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LIFETIME, SKIP, ONLINK, AUTONOMOUS, RDNSS, DNSSL, NS, DOMAIN,
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LOCAL, TRIGGER, SENSITIVE, PREFERENCE, LOW, MEDIUM, HIGH, PROPAGATE,
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ROUTE, ROUTES, RA_PREFERENCE, RA_LIFETIME)
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CF_ENUM(T_ENUM_RA_PREFERENCE, RA_PREF_, LOW, MEDIUM, HIGH)
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%type<i> radv_mult radv_sensitive radv_preference
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CF_GRAMMAR
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CF_ADDTO(proto, radv_proto)
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radv_proto_start: proto_start RADV
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{
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this_proto = proto_config_new(&proto_radv, $1);
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init_list(&RADV_CFG->patt_list);
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init_list(&RADV_CFG->pref_list);
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init_list(&RADV_CFG->rdnss_list);
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init_list(&RADV_CFG->dnssl_list);
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RADV_CFG->route_lifetime = DEFAULT_VALID_LIFETIME;
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RADV_CFG->route_linger_time = DEFAULT_LINGER_TIME;
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};
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radv_proto_item:
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proto_item
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| INTERFACE radv_iface
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| PREFIX radv_prefix { add_tail(&RADV_CFG->pref_list, NODE this_radv_prefix); }
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| RDNSS { init_list(&radv_dns_list); } radv_rdnss { add_tail_list(&RADV_CFG->rdnss_list, &radv_dns_list); }
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| DNSSL { init_list(&radv_dns_list); } radv_dnssl { add_tail_list(&RADV_CFG->dnssl_list, &radv_dns_list); }
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| TRIGGER prefix {
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RADV_CFG->trigger_prefix = $2.addr;
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RADV_CFG->trigger_pxlen = $2.len;
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RADV_CFG->trigger_valid = 1;
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}
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| PROPAGATE ROUTES bool { RADV_CFG->propagate_routes = $3; }
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| ROUTE LIFETIME expr radv_sensitive {
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RADV_CFG->route_lifetime = $3;
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if ($4 != -1) RADV_CFG->route_lifetime_sensitive = $4;
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}
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| ROUTE LINGER TIME expr {
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RADV_CFG->route_linger_time = $4;
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if (($4 < 0) || ($4 > 3600))
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cf_error("Linger time must be in range 0-3600");
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}
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;
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radv_proto_opts:
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/* empty */
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| radv_proto_opts radv_proto_item ';'
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;
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radv_proto:
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radv_proto_start proto_name '{' radv_proto_opts '}';
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radv_iface_start:
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{
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this_ipatt = cfg_allocz(sizeof(struct radv_iface_config));
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add_tail(&RADV_CFG->patt_list, NODE this_ipatt);
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init_list(&this_ipatt->ipn_list);
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init_list(&RADV_IFACE->pref_list);
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init_list(&RADV_IFACE->rdnss_list);
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init_list(&RADV_IFACE->dnssl_list);
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RADV_IFACE->min_ra_int = -1; /* undefined */
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RADV_IFACE->max_ra_int = DEFAULT_MAX_RA_INT;
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RADV_IFACE->min_delay = DEFAULT_MIN_DELAY;
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RADV_IFACE->current_hop_limit = DEFAULT_CURRENT_HOP_LIMIT;
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RADV_IFACE->linger_time = DEFAULT_LINGER_TIME;
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RADV_IFACE->default_lifetime = -1;
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RADV_IFACE->default_lifetime_sensitive = 1;
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RADV_IFACE->default_preference = RA_PREF_MEDIUM;
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};
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radv_iface_item:
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MIN RA INTERVAL expr { RADV_IFACE->min_ra_int = $4; if ($4 < 3) cf_error("Min RA interval must be at least 3"); }
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| MAX RA INTERVAL expr { RADV_IFACE->max_ra_int = $4; if (($4 < 4) || ($4 > 1800)) cf_error("Max RA interval must be in range 4-1800"); }
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| MIN DELAY expr { RADV_IFACE->min_delay = $3; if ($3 <= 0) cf_error("Min delay must be positive"); }
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| MANAGED bool { RADV_IFACE->managed = $2; }
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| OTHER CONFIG bool { RADV_IFACE->other_config = $3; }
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| LINK MTU expr { RADV_IFACE->link_mtu = $3; if ($3 < 0) cf_error("Link MTU must be 0 or positive"); }
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| REACHABLE TIME expr { RADV_IFACE->reachable_time = $3; if (($3 < 0) || ($3 > 3600000)) cf_error("Reachable time must be in range 0-3600000"); }
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| RETRANS TIMER expr { RADV_IFACE->retrans_timer = $3; if ($3 < 0) cf_error("Retrans timer must be 0 or positive"); }
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| LINGER TIME expr { RADV_IFACE->linger_time = $3; if (($3 < 0) || ($3 > 3600)) cf_error("Linger time must be in range 0-3600"); }
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| CURRENT HOP LIMIT expr { RADV_IFACE->current_hop_limit = $4; if (($4 < 0) || ($4 > 255)) cf_error("Current hop limit must be in range 0-255"); }
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| DEFAULT LIFETIME expr radv_sensitive {
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RADV_IFACE->default_lifetime = $3;
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if (($3 < 0) || ($3 > 9000)) cf_error("Default lifetime must be in range 0-9000");
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if ($4 != -1) RADV_IFACE->default_lifetime_sensitive = $4;
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}
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| DEFAULT PREFERENCE radv_preference { RADV_IFACE->default_preference = $3; }
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| PREFIX radv_prefix { add_tail(&RADV_IFACE->pref_list, NODE this_radv_prefix); }
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| RDNSS { init_list(&radv_dns_list); } radv_rdnss { add_tail_list(&RADV_IFACE->rdnss_list, &radv_dns_list); }
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| DNSSL { init_list(&radv_dns_list); } radv_dnssl { add_tail_list(&RADV_IFACE->dnssl_list, &radv_dns_list); }
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| RDNSS LOCAL bool { RADV_IFACE->rdnss_local = $3; }
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| DNSSL LOCAL bool { RADV_IFACE->dnssl_local = $3; }
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;
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radv_preference:
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LOW { $$ = RA_PREF_LOW; }
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| MEDIUM { $$ = RA_PREF_MEDIUM; }
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| HIGH { $$ = RA_PREF_HIGH; }
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radv_iface_finish:
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{
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struct radv_iface_config *ic = RADV_IFACE;
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if (ic->min_ra_int == (u32) -1)
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ic->min_ra_int = MAX_(ic->max_ra_int / 3, 3);
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if (ic->default_lifetime == (u32) -1)
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ic->default_lifetime = 3 * ic->max_ra_int;
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if ((ic->min_ra_int > 3) &&
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(ic->min_ra_int > (ic->max_ra_int * 3 / 4)))
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cf_error("Min RA interval must be at most 3/4 * Max RA interval %d %d", ic->min_ra_int, ic->max_ra_int);
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if ((ic->default_lifetime > 0) && (ic->default_lifetime < ic->max_ra_int))
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cf_error("Default lifetime must be either 0 or at least Max RA interval");
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};
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radv_iface_opts:
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/* empty */
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| radv_iface_opts radv_iface_item ';'
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;
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radv_iface_opt_list:
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/* empty */
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| '{' radv_iface_opts '}'
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;
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radv_iface:
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radv_iface_start iface_patt_list_nopx radv_iface_opt_list radv_iface_finish;
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radv_prefix_start: prefix
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{
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this_radv_prefix = cfg_allocz(sizeof(struct radv_prefix_config));
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RADV_PREFIX->prefix = $1.addr;
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RADV_PREFIX->pxlen = $1.len;
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RADV_PREFIX->onlink = 1;
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RADV_PREFIX->autonomous = 1;
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RADV_PREFIX->valid_lifetime = DEFAULT_VALID_LIFETIME;
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RADV_PREFIX->preferred_lifetime = DEFAULT_PREFERRED_LIFETIME;
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};
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radv_prefix_item:
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SKIP bool { RADV_PREFIX->skip = $2; }
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| ONLINK bool { RADV_PREFIX->onlink = $2; }
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| AUTONOMOUS bool { RADV_PREFIX->autonomous = $2; }
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| VALID LIFETIME expr radv_sensitive {
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RADV_PREFIX->valid_lifetime = $3;
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if ($4 != -1) RADV_PREFIX->valid_lifetime_sensitive = $4;
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}
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| PREFERRED LIFETIME expr radv_sensitive {
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RADV_PREFIX->preferred_lifetime = $3;
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if ($4 != -1) RADV_PREFIX->preferred_lifetime_sensitive = $4;
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}
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;
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radv_prefix_finish:
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{
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if (RADV_PREFIX->preferred_lifetime > RADV_PREFIX->valid_lifetime)
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cf_error("Preferred lifetime must be at most Valid lifetime");
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if (RADV_PREFIX->valid_lifetime_sensitive > RADV_PREFIX->preferred_lifetime_sensitive)
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cf_error("Valid lifetime sensitive requires that Preferred lifetime is sensitive too");
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};
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radv_prefix_opts:
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/* empty */
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| radv_prefix_opts radv_prefix_item ';'
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;
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radv_prefix_opt_list:
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/* empty */
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| '{' radv_prefix_opts '}'
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;
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radv_prefix:
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radv_prefix_start radv_prefix_opt_list radv_prefix_finish;
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radv_rdnss_node: ipa
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{
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struct radv_rdnss_config *cf = cfg_allocz(sizeof(struct radv_rdnss_config));
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add_tail(&radv_dns_list, NODE cf);
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cf->server = $1;
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cf->lifetime_mult = DEFAULT_DNS_LIFETIME_MULT;
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};
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radv_rdnss_start:
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{
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RADV_RDNSS->lifetime = 0;
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RADV_RDNSS->lifetime_mult = DEFAULT_DNS_LIFETIME_MULT;
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};
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radv_rdnss_item:
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| NS radv_rdnss_node
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| LIFETIME radv_mult { RADV_RDNSS->lifetime = $2; RADV_RDNSS->lifetime_mult = radv_mult_val; }
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;
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radv_rdnss_finish:
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{
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if (EMPTY_LIST(radv_dns_list))
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cf_error("No nameserver in RDNSS section");
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struct radv_rdnss_config *cf;
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WALK_LIST(cf, radv_dns_list)
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{
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cf->lifetime = RADV_RDNSS->lifetime;
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cf->lifetime_mult = RADV_RDNSS->lifetime_mult;
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}
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};
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radv_rdnss_opts:
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/* empty */
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| radv_rdnss_opts radv_rdnss_item ';'
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;
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radv_rdnss:
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radv_rdnss_node
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| '{' radv_rdnss_start radv_rdnss_opts '}' radv_rdnss_finish
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;
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radv_dnssl_node: TEXT
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{
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struct radv_dnssl_config *cf = cfg_allocz(sizeof(struct radv_dnssl_config));
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add_tail(&radv_dns_list, NODE cf);
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cf->domain = $1;
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cf->lifetime_mult = DEFAULT_DNS_LIFETIME_MULT;
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if (radv_process_domain(cf) < 0)
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cf_error("Invalid domain dame");
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};
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radv_dnssl_start:
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{
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RADV_DNSSL->lifetime = 0;
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RADV_DNSSL->lifetime_mult = DEFAULT_DNS_LIFETIME_MULT;
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};
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radv_dnssl_item:
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| DOMAIN radv_dnssl_node
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| LIFETIME radv_mult { RADV_DNSSL->lifetime = $2; RADV_DNSSL->lifetime_mult = radv_mult_val; }
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;
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radv_dnssl_finish:
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{
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if (EMPTY_LIST(radv_dns_list))
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cf_error("No domain in DNSSL section");
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struct radv_dnssl_config *cf;
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WALK_LIST(cf, radv_dns_list)
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{
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cf->lifetime = RADV_DNSSL->lifetime;
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cf->lifetime_mult = RADV_DNSSL->lifetime_mult;
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}
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};
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radv_dnssl_opts:
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/* empty */
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| radv_dnssl_opts radv_dnssl_item ';'
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;
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radv_dnssl:
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radv_dnssl_node
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| '{' radv_dnssl_start radv_dnssl_opts '}' radv_dnssl_finish
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;
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radv_mult:
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expr { $$ = $1; radv_mult_val = 0; }
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| MULT expr { $$ = 0; radv_mult_val = $2; if (($2 < 1) || ($2 > 254)) cf_error("Multiplier must be in range 1-254"); }
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;
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radv_sensitive:
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/* empty */ { $$ = -1; }
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| SENSITIVE bool { $$ = $2; }
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;
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CF_ADDTO(dynamic_attr, RA_PREFERENCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_ENUM_RA_PREFERENCE, EA_RA_PREFERENCE); })
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CF_ADDTO(dynamic_attr, RA_LIFETIME { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_RA_LIFETIME); })
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CF_CODE
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CF_END
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