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/*
* Structures for RIP protocol
*/
struct rip_connection {
node n;
int num;
struct proto *proto;
ip_addr addr;
struct rip_entry *sendptr;
sock *send;
};
struct rip_packet_heading {
u8 command;
#define RIPCMD_REQUEST 1 /* want info */
#define RIPCMD_RESPONSE 2 /* responding to request */
#define RIPCMD_TRACEON 3 /* turn tracing on */
#define RIPCMD_TRACEOFF 4 /* turn it off */
#define RIPCMD_MAX 5
u8 version;
#define RIP_V1 1
#define RIP_V2 2
u16 unused;
};
struct rip_block {
u16 family; /* 0xffff on first message means this is authentication */
u16 tag;
ip_addr network;
ip_addr netmask;
ip_addr nexthop;
u32 metric;
};
struct rip_entry {
node n;
ip_addr whotoldme;
ip_addr network;
int pxlen;
ip_addr nexthop;
int metric;
u16 tag;
bird_clock_t updated, changed;
int flags;
#define RIP_F_EXTERNAL 1
};
struct rip_packet {
struct rip_packet_heading heading;
struct rip_block block[25];
};
struct rip_data {
struct proto inherited;
sock *listen;
timer *timer;
list connections;
list rtable;
int magic;
};
#define P ((struct rip_data *) p)
#define E ((struct rip_entry *) e)
#define RIP_MAGIC 81861253
#define CHK_MAGIC do { if (P->magic != RIP_MAGIC) die( "Not enough magic\n" ); } while (0)
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