/* route.h */ #ifndef _NET_ROUTE_H #define _NET_ROUTE_H #include #include /* for AF_MAX */ /* * A route consists of a destination address and a reference * to a routing entry. These are often held by protocols * in their control blocks, e.g. inpcb. */ struct route { struct rtentry *ro_rt; struct sockaddr ro_dst; }; /* * These numbers are used by reliable protocols for determining * retransmission behavior and are included in the routing structure. */ struct rt_metrics { uint32 rmx_locks; /* Kernel must leave these values alone */ uint32 rmx_mtu; /* MTU for this path */ uint32 rmx_hopcount; /* max hops expected */ uint32 rmx_expire; /* lifetime for route, e.g. redirect */ u_long rmx_recvpipe; /* inbound delay-bandwith product */ u_long rmx_sendpipe; /* outbound delay-bandwith product */ u_long rmx_ssthresh; /* outbound gateway buffer limit */ u_long rmx_rtt; /* estimated round trip time */ u_long rmx_rttvar; /* estimated rtt variance */ u_long rmx_pksent; /* packets sent using this route */ }; /* * rmx_rtt and rmx_rttvar are stored as microseconds; * RTTTOPRHZ(rtt) converts to a value suitable for use * by a protocol slowtimo counter. */ #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */ #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ)) struct rtentry { struct radix_node rt_nodes[2]; /* tree glue, and other values */ struct sockaddr *rt_gateway; /* value */ uint rt_flags; /* up/down?, host/net */ int rt_refcnt; /* # held references */ uint32 rt_use; /* raw # packets forwarded */ struct ifnet *rt_ifp; /* the answer: interface to use */ struct ifaddr *rt_ifa; /* the answer: interface to use */ struct sockaddr *rt_genmask; /* for generation of cloned routes */ char * rt_llinfo; /* pointer to link level info cache */ struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */ struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */ struct rtentry *rt_parent; /* If cloned, parent of this route. */ /* XXX - add this! */ // rt_timer; * queue of timeouts for misc funcs * }; #define rt_use rt_rmx.rmx_pksent #define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key)) #define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask)) #define RTF_UP 0x1 /* route usable */ #define RTF_GATEWAY 0x2 /* destination is a gateway */ #define RTF_HOST 0x4 /* host entry (net otherwise) */ #define RTF_REJECT 0x8 /* host or net unreachable */ #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */ #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */ #define RTF_DONE 0x40 /* message confirmed */ #define RTF_MASK 0x80 /* subnet mask present */ #define RTF_CLONING 0x100 /* generate new routes on use */ #define RTF_XRESOLVE 0x200 /* external daemon resolves name */ #define RTF_LLINFO 0x400 /* generated by ARP or ESIS */ #define RTF_STATIC 0x800 /* manually added */ #define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */ #define RTF_PROTO3 0x2000 /* protocol specific routing flag */ #define RTF_PROTO2 0x4000 /* protocol specific routing flag */ #define RTF_PROTO1 0x8000 /* protocol specific routing flag */ #define RTM_VERSION 3 /* Up the ante and ignore older versions */ #define RTM_ADD 0x1 /* Add Route */ #define RTM_DELETE 0x2 /* Delete Route */ #define RTM_CHANGE 0x3 /* Change Metrics or flags */ #define RTM_GET 0x4 /* Report Metrics */ #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */ #define RTM_REDIRECT 0x6 /* Told to use different route */ #define RTM_MISS 0x7 /* Lookup failed on this address */ #define RTM_LOCK 0x8 /* fix specified metrics */ #define RTM_OLDADD 0x9 /* caused by SIOCADDRT */ #define RTM_OLDDEL 0xa /* caused by SIOCDELRT */ #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */ #define RTM_NEWADDR 0xc /* address being added to iface */ #define RTM_DELADDR 0xd /* address being removed from iface */ #define RTM_IFINFO 0xe /* iface going up/down etc. */ #define RTV_MTU 0x1 /* init or lock _mtu */ #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */ #define RTV_EXPIRE 0x4 /* init or lock _hopcount */ #define RTV_RPIPE 0x8 /* init or lock _recvpipe */ #define RTV_SPIPE 0x10 /* init or lock _sendpipe */ #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */ #define RTV_RTT 0x40 /* init or lock _rtt */ #define RTV_RTTVAR 0x80 /* init or lock _rttvar */ /* * Bitmask values for rtm_addr. */ #define RTA_DST 0x1 /* destination sockaddr present */ #define RTA_GATEWAY 0x2 /* gateway sockaddr present */ #define RTA_NETMASK 0x4 /* netmask sockaddr present */ #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */ #define RTA_IFP 0x10 /* interface name sockaddr present */ #define RTA_IFA 0x20 /* interface addr sockaddr present */ #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */ #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */ /* * Index offsets for sockaddr array for alternate internal encoding. */ #define RTAX_DST 0 /* destination sockaddr present */ #define RTAX_GATEWAY 1 /* gateway sockaddr present */ #define RTAX_NETMASK 2 /* netmask sockaddr present */ #define RTAX_GENMASK 3 /* cloning mask sockaddr present */ #define RTAX_IFP 4 /* interface name sockaddr present */ #define RTAX_IFA 5 /* interface addr sockaddr present */ #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */ #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */ #define RTAX_MAX 8 /* size of array to allocate */ struct rt_msghdr { uint16 rtm_msglen; uint8 rtm_version; uint8 rtm_type; uint16 rtm_index; int rtm_flags; int rtm_addrs; int rtm_seq; int rtm_errno; int rtm_use; uint32 rtm_inits; struct rt_metrics rtm_rmx; }; struct rt_addrinfo { int rti_addrs; struct sockaddr *rti_info[RTAX_MAX]; int rti_flags; struct ifaddr *rti_ifa; struct ifnet *rti_ifp; struct rt_msghdr *rti_rtm; }; struct route_cb { int32 ip_count; /* how many AF_INET structures we have */ int32 any_count; /* total of all above... */ }; struct walkarg { int w_op; int w_arg; int w_given; int w_needed; int w_tmemsize; char * w_where; char * w_tmem; }; /* * Routing statistics. */ struct rtstat { int32 rts_badredirect; /* bogus redirect calls */ int32 rts_dynamic; /* routes created by redirects */ int32 rts_newgateway; /* routes modified by redirects */ int32 rts_unreach; /* lookups which failed */ int32 rts_wildcard; /* lookups satisfied by a wildcard */ }; #define RTFREE(rt) do { \ if ((rt)->rt_refcnt <= 1) \ rtfree(rt); \ else \ (rt)->rt_refcnt--; \ } while (0) struct rtstat rtstat; struct radix_node_head *rt_tables[AF_MAX+1]; void route_init(void); int rtinit (struct ifaddr *, int, int); void rtalloc (struct route *); struct rtentry *rtalloc1 (struct sockaddr *, int); void rtfree (struct rtentry *); int rtrequest (int, struct sockaddr *, struct sockaddr *, struct sockaddr *, int, struct rtentry **); void rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask); int rt_setgate (struct rtentry *, struct sockaddr *, struct sockaddr *); struct radix_node_head ** get_rt_tables(void); #endif /* NET_ROUTE_H */