169 lines
3.6 KiB
C
169 lines
3.6 KiB
C
/*
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* Structures for RIP protocol
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*
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FIXME: in V6, they insert additional entry whenever next hop differs. Such entry is identified by 0xff in metric.
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*/
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#include "nest/route.h"
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#include "nest/password.h"
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#include "nest/locks.h"
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#define EA_RIP_TAG EA_CODE(EAP_RIP, 0)
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#define EA_RIP_METRIC EA_CODE(EAP_RIP, 1)
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#define PACKET_MAX 25
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#define PACKET_MD5_MAX 18 /* FIXME */
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struct rip_connection {
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node n;
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int num;
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struct proto *proto;
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ip_addr addr;
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sock *send;
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struct rip_interface *rif;
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struct fib_iterator iter;
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ip_addr daddr;
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int dport;
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int done;
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};
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struct rip_packet_heading { /* 4 bytes */
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u8 command;
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#define RIPCMD_REQUEST 1 /* want info */
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#define RIPCMD_RESPONSE 2 /* responding to request */
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#define RIPCMD_TRACEON 3 /* turn tracing on */
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#define RIPCMD_TRACEOFF 4 /* turn it off */
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#define RIPCMD_MAX 5
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u8 version;
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#define RIP_V1 1
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#define RIP_V2 2
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u16 unused;
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};
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#ifndef IPV6
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struct rip_block { /* 20 bytes */
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u16 family; /* 0xffff on first message means this is authentication */
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u16 tag;
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ip_addr network;
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ip_addr netmask;
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ip_addr nexthop;
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u32 metric;
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};
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#else
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struct rip_block { /* IPv6 version!, 20 bytes, too */
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ip_addr network;
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u16 tag;
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u8 pxlen;
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u8 metric;
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};
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#endif
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struct rip_block_auth { /* 20 bytes */
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u16 mustbeFFFF;
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u16 authtype;
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u16 packetlen;
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u8 keyid;
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u8 authlen;
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u32 seq;
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u32 zero0;
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u32 zero1;
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};
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struct rip_md5_tail { /* 20 bytes */
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u16 mustbeFFFF;
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u16 mustbe0001;
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char md5[16];
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};
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struct rip_entry {
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struct fib_node n;
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ip_addr whotoldme;
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ip_addr nexthop;
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int metric;
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u16 tag;
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bird_clock_t updated, changed;
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int flags;
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};
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struct rip_packet {
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struct rip_packet_heading heading;
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struct rip_block block[PACKET_MAX];
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};
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struct rip_interface {
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node n;
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struct proto *proto;
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struct iface *iface;
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sock *sock;
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struct rip_connection *busy;
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int metric; /* You don't want to put struct rip_patt *patt here -- think about reconfigure */
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int mode;
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int triggered;
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struct object_lock *lock;
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int multicast;
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};
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struct rip_patt {
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struct iface_patt i;
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int metric; /* If you add entries here, don't forget to modify patt_compare! */
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int mode;
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#define IM_BROADCAST 2
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#define IM_QUIET 4
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#define IM_NOLISTEN 8
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#define IM_VERSION1 16
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};
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struct rip_proto_config {
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struct proto_config c;
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list iface_list; /* Patterns configured -- keep it first; see rip_reconfigure why */
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list *passwords; /* Passwords, keep second */
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int infinity; /* User configurable data; must be comparable with memcmp */
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int port;
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int period;
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int garbage_time;
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int timeout_time;
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int authtype;
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#define AT_NONE 0
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#define AT_PLAINTEXT 2
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#define AT_MD5 3
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int honor;
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#define HO_NEVER 0
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#define HO_NEIGHBOR 1
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#define HO_ALWAYS 2
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};
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struct rip_proto {
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struct proto inherited;
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timer *timer;
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list connections;
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struct fib rtable;
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list garbage;
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list interfaces; /* Interfaces we really know about */
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#ifdef LOCAL_DEBUG
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int magic;
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#endif
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int tx_count; /* Do one regular update once in a while */
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};
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#ifdef LOCAL_DEBUG
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#define RIP_MAGIC 81861253
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#define CHK_MAGIC do { if (P->magic != RIP_MAGIC) bug( "Not enough magic" ); } while (0)
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#else
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#define CHK_MAGIC do { } while (0)
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#endif
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void rip_init_instance(struct proto *p);
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void rip_init_config(struct rip_proto_config *c);
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/* Authentication functions */
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int rip_incoming_authentication( struct proto *p, struct rip_block_auth *block, struct rip_packet *packet, int num, ip_addr whotoldme );
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int rip_outgoing_authentication( struct proto *p, struct rip_block_auth *block, struct rip_packet *packet, int num );
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