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Diffstat (limited to '')
| -rw-r--r-- | zebra/irdp.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/zebra/irdp.h b/zebra/irdp.h new file mode 100644 index 0000000..4330734 --- /dev/null +++ b/zebra/irdp.h @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* ICMP Router Discovery Messages + * Copyright (C) 1997, 2000 Kunihiro Ishiguro + */ + +/* + * This file is modified and completed for the Zebra IRDP implementation + * by Robert Olsson, Swedish University of Agricultural Sciences + */ + +#ifndef _IRDP_H +#define _IRDP_H + +#include "lib/vty.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* ICMP Messages */ +#ifndef ICMP_ROUTERADVERT +#define ICMP_ROUTERADVERT 9 +#endif /* ICMP_ROUTERADVERT */ + +#ifndef ICMP_ROUTERSOLICIT +#define ICMP_ROUTERSOLICIT 10 +#endif /* ICMP_ROUTERSOLICT */ + +/* Multicast groups */ +#ifndef INADDR_ALLHOSTS_GROUP +#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ +#endif /* INADDR_ALLHOSTS_GROUP */ + +#ifndef INADDR_ALLRTRS_GROUP +#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ +#endif /* INADDR_ALLRTRS_GROUP */ + +/* Default irdp packet interval */ +#define IRDP_DEFAULT_INTERVAL 300 + +/* Router constants from RFC1256 */ +#define MAX_INITIAL_ADVERT_INTERVAL 16 +#define MAX_INITIAL_ADVERTISEMENTS 3 +#define MAX_RESPONSE_DELAY 2 + +#define IRDP_MAXADVERTINTERVAL 600 +#define IRDP_MINADVERTINTERVAL 450 /* 0.75*600 */ +#define IRDP_LIFETIME 1350 /* 3*450 */ +#define IRDP_PREFERENCE 0 + +#define ICMP_MINLEN 8 + +#define IRDP_LAST_ADVERT_MESSAGES 2 /* The last adverts with Holdtime 0 */ + +#define IRDP_RX_BUF 1500 + +/* + Comments comes from RFC1256 ICMP Router Discovery Messages. + + The IP destination address to be used for multicast Router + Advertisements sent from the interface. The only permissible + values are the all-systems multicast address, 224.0.0.1, or the + limited-broadcast address, 255.255.255.255. (The all-systems + address is preferred wherever possible, i.e., on any link where + all listening hosts support IP multicast.) + + Default: 224.0.0.1 if the router supports IP multicast on the + interface, else 255.255.255.255 + + The maximum time allowed between sending multicast Router + Advertisements from the interface, in seconds. Must be no less + than 4 seconds and no greater than 1800 seconds. + + Default: 600 seconds + + The minimum time allowed between sending unsolicited multicast + Router Advertisements from the interface, in seconds. Must be no + less than 3 seconds and no greater than MaxAdvertisementInterval. + + Default: 0.75 * MaxAdvertisementInterval + + The value to be placed in the Lifetime field of Router + Advertisements sent from the interface, in seconds. Must be no + less than MaxAdvertisementInterval and no greater than 9000 + seconds. + + Default: 3 * MaxAdvertisementInterval + + The preferability of the address as a default router address, + relative to other router addresses on the same subnet. A 32-bit, + signed, twos-complement integer, with higher values meaning more + preferable. The minimum value (hex 80000000) is used to indicate + that the address, even though it may be advertised, is not to be + used by neighboring hosts as a default router address. + + Default: 0 +*/ + +struct irdp_interface { + bool started; + + unsigned long MaxAdvertInterval; + unsigned long MinAdvertInterval; + unsigned long Preference; + + uint32_t flags; + +#define IF_ACTIVE (1<<0) /* ICMP Active */ +#define IF_BROADCAST (1<<1) /* 255.255.255.255 */ +#define IF_SOLICIT (1<<2) /* Solicit active */ +#define IF_DEBUG_MESSAGES (1<<3) +#define IF_DEBUG_PACKET (1<<4) +#define IF_DEBUG_MISC (1<<5) +#define IF_SHUTDOWN (1<<6) + + struct interface *ifp; + struct event *t_advertise; + unsigned long irdp_sent; + uint16_t Lifetime; + + struct list *AdvPrefList; +}; + +struct Adv { + struct in_addr ip; + int pref; +}; + +extern void irdp_if_init(void); +extern int irdp_sock_init(void); +extern int irdp_config_write(struct vty *, struct interface *); +extern void irdp_send_thread(struct event *t_advert); +extern void irdp_advert_off(struct interface *ifp); +extern void process_solicit(struct interface *ifp); +extern void irdp_read_raw(struct event *r); +extern void send_packet(struct interface *ifp, struct stream *s, uint32_t dst, + struct prefix *p, uint32_t ttl); + +#ifdef __cplusplus +} +#endif + +#endif /* _IRDP_H */ |