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718e3744 | 1 | /* ICMP Router Discovery Messages |
2 | * Copyright (C) 1997, 2000 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
d62a17ae | 21 | /* |
ca776988 | 22 | * This file is modified and completed for the Zebra IRDP implementation |
23 | * by Robert Olsson, Swedish University of Agricultural Sciences | |
24 | */ | |
25 | ||
26 | #ifndef _IRDP_H | |
27 | #define _IRDP_H | |
28 | ||
29 | #include "lib/vty.h" | |
30 | ||
51e94aa7 EDP |
31 | #ifdef __cplusplus |
32 | extern "C" { | |
33 | #endif | |
34 | ||
718e3744 | 35 | /* ICMP Messages */ |
36 | #ifndef ICMP_ROUTERADVERT | |
37 | #define ICMP_ROUTERADVERT 9 | |
38 | #endif /* ICMP_ROUTERADVERT */ | |
39 | ||
40 | #ifndef ICMP_ROUTERSOLICIT | |
41 | #define ICMP_ROUTERSOLICIT 10 | |
42 | #endif /* ICMP_ROUTERSOLICT */ | |
43 | ||
44 | /* Multicast groups */ | |
45 | #ifndef INADDR_ALLHOSTS_GROUP | |
ca776988 | 46 | #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ |
718e3744 | 47 | #endif /* INADDR_ALLHOSTS_GROUP */ |
48 | ||
49 | #ifndef INADDR_ALLRTRS_GROUP | |
ca776988 | 50 | #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ |
718e3744 | 51 | #endif /* INADDR_ALLRTRS_GROUP */ |
52 | ||
ca776988 | 53 | /* Default irdp packet interval */ |
c258527b | 54 | #define IRDP_DEFAULT_INTERVAL 300 |
ca776988 | 55 | |
56 | /* Router constants from RFC1256 */ | |
57 | #define MAX_INITIAL_ADVERT_INTERVAL 16 | |
58 | #define MAX_INITIAL_ADVERTISEMENTS 3 | |
59 | #define MAX_RESPONSE_DELAY 2 | |
60 | ||
61 | #define IRDP_MAXADVERTINTERVAL 600 | |
62 | #define IRDP_MINADVERTINTERVAL 450 /* 0.75*600 */ | |
63 | #define IRDP_LIFETIME 1350 /* 3*450 */ | |
64 | #define IRDP_PREFERENCE 0 | |
65 | ||
66 | #define ICMP_MINLEN 8 | |
67 | ||
68 | #define IRDP_LAST_ADVERT_MESSAGES 2 /* The last adverts with Holdtime 0 */ | |
69 | ||
70 | #define IRDP_RX_BUF 1500 | |
71 | ||
d62a17ae | 72 | /* |
73 | Comments comes from RFC1256 ICMP Router Discovery Messages. | |
ca776988 | 74 | |
75 | The IP destination address to be used for multicast Router | |
718e3744 | 76 | Advertisements sent from the interface. The only permissible |
77 | values are the all-systems multicast address, 224.0.0.1, or the | |
78 | limited-broadcast address, 255.255.255.255. (The all-systems | |
79 | address is preferred wherever possible, i.e., on any link where | |
80 | all listening hosts support IP multicast.) | |
81 | ||
82 | Default: 224.0.0.1 if the router supports IP multicast on the | |
d62a17ae | 83 | interface, else 255.255.255.255 |
718e3744 | 84 | |
ca776988 | 85 | The maximum time allowed between sending multicast Router |
718e3744 | 86 | Advertisements from the interface, in seconds. Must be no less |
87 | than 4 seconds and no greater than 1800 seconds. | |
88 | ||
d62a17ae | 89 | Default: 600 seconds |
718e3744 | 90 | |
ca776988 | 91 | The minimum time allowed between sending unsolicited multicast |
718e3744 | 92 | Router Advertisements from the interface, in seconds. Must be no |
93 | less than 3 seconds and no greater than MaxAdvertisementInterval. | |
94 | ||
d62a17ae | 95 | Default: 0.75 * MaxAdvertisementInterval |
718e3744 | 96 | |
ca776988 | 97 | The value to be placed in the Lifetime field of Router |
718e3744 | 98 | Advertisements sent from the interface, in seconds. Must be no |
99 | less than MaxAdvertisementInterval and no greater than 9000 | |
100 | seconds. | |
101 | ||
d62a17ae | 102 | Default: 3 * MaxAdvertisementInterval |
718e3744 | 103 | |
ca776988 | 104 | The preferability of the address as a default router address, |
718e3744 | 105 | relative to other router addresses on the same subnet. A 32-bit, |
106 | signed, twos-complement integer, with higher values meaning more | |
107 | preferable. The minimum value (hex 80000000) is used to indicate | |
108 | that the address, even though it may be advertised, is not to be | |
109 | used by neighboring hosts as a default router address. | |
110 | ||
d62a17ae | 111 | Default: 0 |
ca776988 | 112 | */ |
718e3744 | 113 | |
d62a17ae | 114 | struct irdp_interface { |
e92044cd DS |
115 | bool started; |
116 | ||
d62a17ae | 117 | unsigned long MaxAdvertInterval; |
118 | unsigned long MinAdvertInterval; | |
119 | unsigned long Preference; | |
718e3744 | 120 | |
d7c0a89a | 121 | uint32_t flags; |
718e3744 | 122 | |
ca776988 | 123 | #define IF_ACTIVE (1<<0) /* ICMP Active */ |
124 | #define IF_BROADCAST (1<<1) /* 255.255.255.255 */ | |
125 | #define IF_SOLICIT (1<<2) /* Solicit active */ | |
c258527b QY |
126 | #define IF_DEBUG_MESSAGES (1<<3) |
127 | #define IF_DEBUG_PACKET (1<<4) | |
128 | #define IF_DEBUG_MISC (1<<5) | |
129 | #define IF_SHUTDOWN (1<<6) | |
718e3744 | 130 | |
d62a17ae | 131 | struct interface *ifp; |
132 | struct thread *t_advertise; | |
133 | unsigned long irdp_sent; | |
d7c0a89a | 134 | uint16_t Lifetime; |
718e3744 | 135 | |
d62a17ae | 136 | struct list *AdvPrefList; |
ca776988 | 137 | }; |
718e3744 | 138 | |
d62a17ae | 139 | struct Adv { |
140 | struct in_addr ip; | |
141 | int pref; | |
718e3744 | 142 | }; |
143 | ||
2eb27eec | 144 | extern void irdp_if_init(void); |
2da40f49 | 145 | extern int irdp_sock_init(void); |
2eb27eec | 146 | extern int irdp_config_write(struct vty *, struct interface *); |
cc9f21da | 147 | extern void irdp_send_thread(struct thread *t_advert); |
ab0f6155 | 148 | extern void irdp_advert_off(struct interface *ifp); |
d62a17ae | 149 | extern void process_solicit(struct interface *ifp); |
cc9f21da | 150 | extern void irdp_read_raw(struct thread *r); |
d7c0a89a QY |
151 | extern void send_packet(struct interface *ifp, struct stream *s, uint32_t dst, |
152 | struct prefix *p, uint32_t ttl); | |
ab0f6155 | 153 | |
51e94aa7 EDP |
154 | #ifdef __cplusplus |
155 | } | |
156 | #endif | |
ca776988 | 157 | |
2da40f49 | 158 | #endif /* _IRDP_H */ |