Implements Router Advertisement protocol.

1 files changed, 157 insertions, 0 deletions

diff --git a/proto/radv/config.Y b/proto/radv/config.Y
new file mode 100644
index 00000000..78a09551
--- /dev/null
+++ b/proto/radv/config.Y
@@ -0,0 +1,157 @@
+/*
+ *	BIRD -- Router Advertisement Configuration
+ *
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+CF_HDR
+
+#include "proto/radv/radv.h"
+
+CF_DEFINES
+
+#define RADV_CFG ((struct radv_config *) this_proto)
+#define RADV_IFACE ((struct radv_iface_config *) this_ipatt)
+#define RADV_PREFIX this_radv_prefix
+
+static struct radv_prefix_config *this_radv_prefix;
+
+CF_DECLS
+
+CF_KEYWORDS(RADV, PREFIX, INTERFACE, MIN, MAX, RA, DELAY, INTERVAL,
+	MANAGED, OTHER, CONFIG, LINK, MTU, REACHABLE, TIME, RETRANS,
+	TIMER, CURRENT, HOP, LIMIT, DEFAULT, VALID, PREFERRED,
+	LIFETIME, SKIP, ONLINK, AUTONOMOUS)
+
+
+CF_GRAMMAR
+
+CF_ADDTO(proto, radv_proto '}')
+
+radv_proto_start: proto_start RADV
+{
+  this_proto = proto_config_new(&proto_radv, sizeof(struct radv_config));
+  init_list(&RADV_CFG->patt_list);
+  init_list(&RADV_CFG->pref_list);
+};
+
+radv_proto_item:
+   proto_item
+ | PREFIX radv_prefix { add_tail(&RADV_CFG->pref_list, NODE this_radv_prefix); }
+ | INTERFACE radv_iface
+ ;
+
+radv_proto_opts:
+   /* empty */
+ | radv_proto_opts radv_proto_item ';'
+ ;
+
+radv_proto:
+   radv_proto_start proto_name '{' radv_proto_opts;
+
+
+radv_iface_start:
+{
+  this_ipatt = cfg_allocz(sizeof(struct radv_iface_config));
+  add_tail(&RADV_CFG->patt_list, NODE this_ipatt);
+  init_list(&this_ipatt->ipn_list);
+  init_list(&RADV_IFACE->pref_list);
+
+  RADV_IFACE->min_ra_int = -1; /* undefined */
+  RADV_IFACE->max_ra_int = DEFAULT_MAX_RA_INT;
+  RADV_IFACE->min_delay = DEFAULT_MIN_DELAY;
+  RADV_IFACE->current_hop_limit = DEFAULT_CURRENT_HOP_LIMIT;
+  RADV_IFACE->default_lifetime = -1;
+};
+
+radv_iface_item:
+   MIN RA INTERVAL expr { RADV_IFACE->min_ra_int = $4; if ($4 < 3) cf_error("Min RA interval must be at least 3"); }
+ | 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"); }
+ | MIN DELAY expr { RADV_IFACE->min_delay = $3; if ($3 <= 0) cf_error("Min delay must be positive"); }
+ | MANAGED bool { RADV_IFACE->managed = $2; }
+ | OTHER CONFIG bool { RADV_IFACE->other_config = $3; }
+ | LINK MTU expr { RADV_IFACE->link_mtu = $3; if ($3 < 0) cf_error("Link MTU must be 0 or positive"); }
+ | REACHABLE TIME expr { RADV_IFACE->reachable_time = $3; if (($3 < 0) || ($3 > 3600000)) cf_error("Reachable time must be in range 0-3600000"); }
+ | RETRANS TIMER expr { RADV_IFACE->retrans_timer = $3; if ($3 < 0) cf_error("Retrans timer must be 0 or positive"); }
+ | 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"); }
+ | DEFAULT LIFETIME expr { RADV_IFACE->default_lifetime = $3; if (($3 < 0) || ($3 > 9000))  cf_error("Default lifetime must be in range 0-9000"); }
+ | PREFIX radv_prefix { add_tail(&RADV_IFACE->pref_list, NODE this_radv_prefix); }
+ ;
+
+radv_iface_finish:
+{
+  struct radv_iface_config *ic = RADV_IFACE;
+
+  if (ic->min_ra_int == (u32) -1)
+    ic->min_ra_int = _MAX(ic->max_ra_int / 3, 3);
+
+  if (ic->default_lifetime == (u32) -1)
+    ic->default_lifetime = 3 * ic->max_ra_int;
+
+  if ((ic->min_ra_int > 3) &&
+      (ic->min_ra_int > (ic->max_ra_int * 3 / 4)))
+    cf_error("Min RA interval must be at most 3/4 * Max RA interval %d %d", ic->min_ra_int, ic->max_ra_int);
+
+  if ((ic->default_lifetime > 0) && (ic->default_lifetime < ic->max_ra_int))
+    cf_error("Default lifetime must be either 0 or at least Max RA interval");
+};
+
+
+radv_iface_opts:
+   /* empty */
+ | radv_iface_opts radv_iface_item ';'
+ ;
+
+radv_iface_opt_list:
+   /* empty */
+ | '{' radv_iface_opts '}'
+ ;
+
+radv_iface:
+  radv_iface_start iface_patt_list radv_iface_opt_list radv_iface_finish;
+
+
+radv_prefix_start: prefix
+{
+  this_radv_prefix = cfg_allocz(sizeof(struct radv_prefix_config));
+  RADV_PREFIX->prefix = $1.addr;
+  RADV_PREFIX->pxlen = $1.len;
+
+  RADV_PREFIX->onlink = 1;
+  RADV_PREFIX->autonomous = 1;
+  RADV_PREFIX->valid_lifetime = DEFAULT_VALID_LIFETIME;
+  RADV_PREFIX->preferred_lifetime = DEFAULT_PREFERRED_LIFETIME;
+};
+
+radv_prefix_item:
+   SKIP bool { RADV_PREFIX->skip = $2; }
+ | ONLINK bool { RADV_PREFIX->onlink = $2; }
+ | AUTONOMOUS bool { RADV_PREFIX->autonomous = $2; }
+ | VALID LIFETIME expr { RADV_PREFIX->valid_lifetime = $3; if ($3 < 0) cf_error("Valid lifetime must be 0 or positive"); }
+ | PREFERRED LIFETIME expr { RADV_PREFIX->preferred_lifetime = $3; if ($3 < 0) cf_error("Preferred lifetime must be 0 or positive"); }
+ ;
+
+radv_prefix_finish:
+{
+  if (RADV_PREFIX->preferred_lifetime > RADV_PREFIX->valid_lifetime)
+    cf_error("Preferred lifetime must be at most Valid lifetime");
+};
+
+radv_prefix_opts:
+   /* empty */
+ | radv_prefix_opts radv_prefix_item ';'
+ ;
+
+radv_prefix_opt_list:
+   /* empty */
+ | '{' radv_prefix_opts '}'
+ ;
+
+radv_prefix:
+  radv_prefix_start radv_prefix_opt_list radv_prefix_finish;
+
+
+CF_CODE
+
+CF_END