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31 * @(#)routed.h 8.1 (Berkeley) 6/2/93
44 * Routing Information Protocol
46 * Derived from Xerox NS Routing Information Protocol
47 * by changing 32-bit net numbers to sockaddr's and
48 * padding stuff to 32-bit boundaries.
54 #define RIPVERSION RIPv1
60 /* Note that this so called sockaddr has a 2-byte sa_family and no sa_len.
61 * It is not a UNIX sockaddr, but the shape of an address as defined
62 * in RIPv1. It is still defined to allow old versions of programs
63 * such as `gated` to use this file to define RIPv1.
66 struct sockaddr rip_dst; /* destination net/host */
67 u_int32_t rip_metric; /* cost of route */
72 #define RIP_AF_INET htons(AF_INET)
73 #define RIP_AF_UNSPEC 0
74 #define RIP_AF_AUTH 0xffff
75 u_int16_t n_tag; /* optional in RIPv2 */
76 u_int32_t n_dst; /* destination net or host */
78 u_int32_t n_mask; /* netmask in RIPv2 */
79 u_int32_t n_nhop; /* optional next hop in RIPv2 */
80 u_int32_t n_metric; /* cost of route */
84 /* RIPv2 authentication */
86 u_int16_t a_family; /* always RIP_AF_AUTH */
88 #define RIP_AUTH_NONE 0
89 #define RIP_AUTH_PW htons(2) /* password type */
90 #define RIP_AUTH_MD5 htons(3) /* Keyed MD5 */
92 #define RIP_AUTH_PW_LEN 16
93 u_int8_t au_pw[RIP_AUTH_PW_LEN];
95 int16_t md5_pkt_len; /* RIP-II packet length */
96 int8_t md5_keyid; /* key ID and auth data len */
97 int8_t md5_auth_len; /* 16 */
98 u_int32_t md5_seqno; /* sequence number */
99 u_int32_t rsvd[2]; /* must be 0 */
100 #define RIP_AUTH_MD5_KEY_LEN RIP_AUTH_PW_LEN
101 #define RIP_AUTH_MD5_HASH_XTRA (sizeof(struct netauth)-sizeof(struct a_md5))
102 #define RIP_AUTH_MD5_HASH_LEN (RIP_AUTH_MD5_KEY_LEN+RIP_AUTH_MD5_HASH_XTRA)
108 u_int8_t rip_cmd; /* request/response */
109 u_int8_t rip_vers; /* protocol version # */
110 u_int16_t rip_res1; /* pad to 32-bit boundary */
111 union { /* variable length... */
112 struct netinfo ru_nets[1];
113 int8_t ru_tracefile[1];
114 struct netauth ru_auth[1];
116 #define rip_nets ripun.ru_nets
117 #define rip_auths ripun.ru_auth
118 #define rip_tracefile ripun.ru_tracefile
123 #define RIPCMD_REQUEST 1 /* want info */
124 #define RIPCMD_RESPONSE 2 /* responding to request */
125 #define RIPCMD_TRACEON 3 /* turn tracing on */
126 #define RIPCMD_TRACEOFF 4 /* turn it off */
128 /* Gated extended RIP to include a "poll" command instead of using
129 * RIPCMD_REQUEST with (RIP_AF_UNSPEC, RIP_DEFAULT). RFC 1058 says
130 * command 5 is used by Sun Microsystems for its own purposes.
132 #define RIPCMD_POLL 5
137 const char *ripcmds[RIPCMD_MAX] = {
138 "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF"
142 #define HOPCNT_INFINITY 16
143 #define MAXPACKETSIZE 512 /* max broadcast size */
144 #define NETS_LEN ((MAXPACKETSIZE-sizeof(struct rip)) \
145 / sizeof(struct netinfo) +1)
147 #define INADDR_RIP_GROUP (u_int32_t)0xe0000009 /* 224.0.0.9 */
150 /* Timer values used in managing the routing table.
152 * Complete tables are broadcast every SUPPLY_INTERVAL seconds.
153 * If changes occur between updates, dynamic updates containing only changes
154 * may be sent. When these are sent, a timer is set for a random value
155 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates
156 * are sent until the timer expires.
158 * Every update of a routing entry forces an entry's timer to be reset.
159 * After EXPIRE_TIME without updates, the entry is marked invalid,
160 * but held onto until GARBAGE_TIME so that others may see it, to
161 * "poison" the bad route.
163 #define SUPPLY_INTERVAL 30 /* time to supply tables */
164 #define MIN_WAITTIME 2 /* min sec until next flash updates */
165 #define MAX_WAITTIME 5 /* max sec until flash update */
167 #define STALE_TIME 90 /* switch to a new gateway */
168 #define EXPIRE_TIME 180 /* time to mark entry invalid */
169 #define GARBAGE_TIME 240 /* time to garbage collect */
174 #endif /* !_ROUTED_H_ */