52a3801208
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96
209 lines
8.2 KiB
C
209 lines
8.2 KiB
C
/* route.h */
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#ifndef NET_ROUTE_H
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#define NET_ROUTE_H
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#include "net/radix.h"
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#include "sys/socket.h" /* for AF_MAX */
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/*
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* A route consists of a destination address and a reference
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* to a routing entry. These are often held by protocols
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* in their control blocks, e.g. inpcb.
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*/
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struct route {
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struct rtentry *ro_rt;
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struct sockaddr ro_dst;
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};
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/*
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* These numbers are used by reliable protocols for determining
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* retransmission behavior and are included in the routing structure.
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*/
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struct rt_metrics {
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uint32 rmx_locks; /* Kernel must leave these values alone */
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uint32 rmx_mtu; /* MTU for this path */
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uint32 rmx_hopcount; /* max hops expected */
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uint32 rmx_expire; /* lifetime for route, e.g. redirect */
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u_long rmx_recvpipe; /* inbound delay-bandwith product */
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u_long rmx_sendpipe; /* outbound delay-bandwith product */
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u_long rmx_ssthresh; /* outbound gateway buffer limit */
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u_long rmx_rtt; /* estimated round trip time */
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u_long rmx_rttvar; /* estimated rtt variance */
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u_long rmx_pksent; /* packets sent using this route */
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};
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/*
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* rmx_rtt and rmx_rttvar are stored as microseconds;
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* RTTTOPRHZ(rtt) converts to a value suitable for use
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* by a protocol slowtimo counter.
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*/
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#define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
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#define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
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struct rtentry {
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struct radix_node rt_nodes[2]; /* tree glue, and other values */
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struct sockaddr *rt_gateway; /* value */
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uint rt_flags; /* up/down?, host/net */
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int rt_refcnt; /* # held references */
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uint32 rt_use; /* raw # packets forwarded */
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struct ifnet *rt_ifp; /* the answer: interface to use */
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struct ifaddr *rt_ifa; /* the answer: interface to use */
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struct sockaddr *rt_genmask; /* for generation of cloned routes */
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caddr_t rt_llinfo; /* pointer to link level info cache */
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struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */
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struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */
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struct rtentry *rt_parent; /* If cloned, parent of this route. */
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/* XXX - add this! */
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// rt_timer; * queue of timeouts for misc funcs *
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};
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#define rt_use rt_rmx.rmx_pksent
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#define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key))
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#define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask))
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#define RTF_UP 0x1 /* route usable */
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#define RTF_GATEWAY 0x2 /* destination is a gateway */
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#define RTF_HOST 0x4 /* host entry (net otherwise) */
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#define RTF_REJECT 0x8 /* host or net unreachable */
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#define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
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#define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
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#define RTF_DONE 0x40 /* message confirmed */
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#define RTF_MASK 0x80 /* subnet mask present */
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#define RTF_CLONING 0x100 /* generate new routes on use */
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#define RTF_XRESOLVE 0x200 /* external daemon resolves name */
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#define RTF_LLINFO 0x400 /* generated by ARP or ESIS */
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#define RTF_STATIC 0x800 /* manually added */
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#define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
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#define RTF_PROTO3 0x2000 /* protocol specific routing flag */
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#define RTF_PROTO2 0x4000 /* protocol specific routing flag */
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#define RTF_PROTO1 0x8000 /* protocol specific routing flag */
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#define RTM_VERSION 3 /* Up the ante and ignore older versions */
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#define RTM_ADD 0x1 /* Add Route */
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#define RTM_DELETE 0x2 /* Delete Route */
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#define RTM_CHANGE 0x3 /* Change Metrics or flags */
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#define RTM_GET 0x4 /* Report Metrics */
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#define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
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#define RTM_REDIRECT 0x6 /* Told to use different route */
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#define RTM_MISS 0x7 /* Lookup failed on this address */
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#define RTM_LOCK 0x8 /* fix specified metrics */
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#define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
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#define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
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#define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
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#define RTM_NEWADDR 0xc /* address being added to iface */
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#define RTM_DELADDR 0xd /* address being removed from iface */
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#define RTM_IFINFO 0xe /* iface going up/down etc. */
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#define RTV_MTU 0x1 /* init or lock _mtu */
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#define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
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#define RTV_EXPIRE 0x4 /* init or lock _hopcount */
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#define RTV_RPIPE 0x8 /* init or lock _recvpipe */
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#define RTV_SPIPE 0x10 /* init or lock _sendpipe */
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#define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
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#define RTV_RTT 0x40 /* init or lock _rtt */
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#define RTV_RTTVAR 0x80 /* init or lock _rttvar */
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/*
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* Bitmask values for rtm_addr.
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*/
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#define RTA_DST 0x1 /* destination sockaddr present */
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#define RTA_GATEWAY 0x2 /* gateway sockaddr present */
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#define RTA_NETMASK 0x4 /* netmask sockaddr present */
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#define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
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#define RTA_IFP 0x10 /* interface name sockaddr present */
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#define RTA_IFA 0x20 /* interface addr sockaddr present */
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#define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
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#define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
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/*
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* Index offsets for sockaddr array for alternate internal encoding.
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*/
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#define RTAX_DST 0 /* destination sockaddr present */
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#define RTAX_GATEWAY 1 /* gateway sockaddr present */
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#define RTAX_NETMASK 2 /* netmask sockaddr present */
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#define RTAX_GENMASK 3 /* cloning mask sockaddr present */
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#define RTAX_IFP 4 /* interface name sockaddr present */
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#define RTAX_IFA 5 /* interface addr sockaddr present */
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#define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
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#define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
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#define RTAX_MAX 8 /* size of array to allocate */
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struct rt_msghdr {
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uint16 rtm_msglen;
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uint8 rtm_version;
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uint8 rtm_type;
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uint16 rtm_index;
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int rtm_flags;
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int rtm_addrs;
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int rtm_seq;
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int rtm_errno;
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int rtm_use;
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uint32 rtm_inits;
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struct rt_metrics rtm_rmx;
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};
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struct rt_addrinfo {
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int rti_addrs;
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struct sockaddr *rti_info[RTAX_MAX];
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int rti_flags;
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struct ifaddr *rti_ifa;
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struct ifnet *rti_ifp;
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struct rt_msghdr *rti_rtm;
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};
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struct route_cb {
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int32 ip_count; /* how many AF_INET structures we have */
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int32 any_count; /* total of all above... */
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};
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struct walkarg {
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int w_op;
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int w_arg;
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int w_given;
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int w_needed;
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int w_tmemsize;
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caddr_t w_where;
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caddr_t w_tmem;
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};
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/*
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* Routing statistics.
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*/
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struct rtstat {
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int32 rts_badredirect; /* bogus redirect calls */
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int32 rts_dynamic; /* routes created by redirects */
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int32 rts_newgateway; /* routes modified by redirects */
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int32 rts_unreach; /* lookups which failed */
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int32 rts_wildcard; /* lookups satisfied by a wildcard */
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};
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#define RTFREE(rt) do { \
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if ((rt)->rt_refcnt <= 1) \
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rtfree(rt); \
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else \
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(rt)->rt_refcnt--; \
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} while (0)
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struct rtstat rtstat;
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struct radix_node_head *rt_tables[AF_MAX+1];
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void route_init(void);
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int rtinit (struct ifaddr *, int, int);
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void rtalloc (struct route *);
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struct rtentry *rtalloc1 (struct sockaddr *, int);
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void rtfree (struct rtentry *);
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int rtrequest (int, struct sockaddr *,
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struct sockaddr *, struct sockaddr *, int,
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struct rtentry **);
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void rt_maskedcopy(struct sockaddr *src,
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struct sockaddr *dst,
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struct sockaddr *netmask);
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int rt_setgate (struct rtentry *, struct sockaddr *,
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struct sockaddr *);
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struct radix_node_head ** get_rt_tables(void);
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#endif /* NET_ROUTE_H */
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