+struct rt_msghdr {
+ u_short rtm_msglen; /* to skip over non-understood messages */
+ u_char rtm_version; /* future binary compatibility */
+ u_char rtm_type; /* message type */
+ u_short rtm_index; /* index for associated ifp */
+ int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
+ int rtm_addrs; /* bitmask identifying sockaddrs in msg */
+ pid_t rtm_pid; /* identify sender */
+ int rtm_seq; /* for sender to identify action */
+ int rtm_errno; /* why failed */
+ int rtm_use; /* from rtentry */
+ u_long rtm_inits; /* which metrics we are initializing */
+ struct rt_metrics rtm_rmx; /* metrics themselves */
+};
+
+#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_addrinfo {
+ int rti_addrs;
+ struct sockaddr *rti_info[RTAX_MAX];
+};
+
+struct route_cb {
+ int ip_count;
+ int ns_count;
+ int iso_count;
+ int any_count;
+};
+
+#ifdef KERNEL
+#define RTFREE(rt) \
+ if ((rt)->rt_refcnt <= 1) \
+ rtfree(rt); \
+ else \
+ (rt)->rt_refcnt--;
+
+struct route_cb route_cb;
+struct rtstat rtstat;
+struct radix_node_head *rt_tables[AF_MAX+1];
+
+struct socket;
+
+void route_init __P((void));
+int route_output __P((struct mbuf *, struct socket *));
+int route_usrreq __P((struct socket *,
+ int, struct mbuf *, struct mbuf *, struct mbuf *));
+void rt_ifmsg __P((struct ifnet *));
+void rt_maskedcopy __P((struct sockaddr *,
+ struct sockaddr *, struct sockaddr *));
+void rt_missmsg __P((int, struct rt_addrinfo *, int, int));
+void rt_newaddrmsg __P((int, struct ifaddr *, int, struct rtentry *));
+int rt_setgate __P((struct rtentry *,
+ struct sockaddr *, struct sockaddr *));
+void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *));
+void rtable_init __P((void **));
+void rtalloc __P((struct route *));
+struct rtentry *
+ rtalloc1 __P((struct sockaddr *, int));
+void rtfree __P((struct rtentry *));
+int rtinit __P((struct ifaddr *, int, int));
+int rtioctl __P((u_long, caddr_t, struct proc *));
+int rtredirect __P((struct sockaddr *, struct sockaddr *,
+ struct sockaddr *, int, struct sockaddr *, struct rtentry **));
+int rtrequest __P((int, struct sockaddr *,
+ struct sockaddr *, struct sockaddr *, int, struct rtentry **));