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/*
 *	BIRD -- Babel Configuration
 *
 *	Copyright (c) 2015-2016 Toke Hoiland-Jorgensen
 *
 *	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, METRIC, RXCOST, HELLO, UPDATE, INTERVAL, PORT, WIRED,
WIRELESS, RX, TX, BUFFER, LENGTH, CHECK, LINK, BABEL_METRIC)

CF_GRAMMAR

CF_ADDTO(proto, babel_proto)

babel_proto_start: proto_start BABEL
{
  this_proto = proto_config_new(&proto_babel, $1);
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  this_proto->net_type = NET_IP6;
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  init_list(&BABEL_CFG->iface_list);
};

babel_proto_item:
   proto_item
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 | proto_channel
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 | INTERFACE babel_iface
 ;

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->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;
  }

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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);
  BABEL_IFACE->ihu_interval = MIN_(BABEL_IFACE->hello_interval*BABEL_IHU_INTERVAL_FACTOR, BABEL_MAX_INTERVAL);
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};


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"); }
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 | HELLO INTERVAL expr { BABEL_IFACE->hello_interval = $3; if (($3<1) || ($3>BABEL_MAX_INTERVAL)) cf_error("Invalid hello interval"); }
 | 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; }
 | TYPE WIRELESS { BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRELESS; }
 | 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; }
 ;

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_CODE

CF_END