1001 lines
24 KiB
C
1001 lines
24 KiB
C
/*
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* Copyright (c) 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)rtsock.c 8.5 (Berkeley) 11/2/94
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* $Id: rtsock.c,v 1.37 1997/10/31 08:53:13 davidg Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/raw_cb.h>
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MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
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static struct sockaddr route_dst = { 2, PF_ROUTE, };
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static struct sockaddr route_src = { 2, PF_ROUTE, };
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static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
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static struct sockproto route_proto = { PF_ROUTE, };
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struct walkarg {
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int w_tmemsize;
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int w_op, w_arg;
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caddr_t w_tmem;
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struct sysctl_req *w_req;
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};
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static struct mbuf *
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rt_msg1 __P((int, struct rt_addrinfo *));
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static int rt_msg2 __P((int,
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struct rt_addrinfo *, caddr_t, struct walkarg *));
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static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *));
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static int sysctl_dumpentry __P((struct radix_node *rn, void *vw));
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static int sysctl_iflist __P((int af, struct walkarg *w));
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static int route_output __P((struct mbuf *, struct socket *));
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static void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *));
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/* Sleazy use of local variables throughout file, warning!!!! */
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#define dst info.rti_info[RTAX_DST]
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#define gate info.rti_info[RTAX_GATEWAY]
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#define netmask info.rti_info[RTAX_NETMASK]
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#define genmask info.rti_info[RTAX_GENMASK]
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#define ifpaddr info.rti_info[RTAX_IFP]
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#define ifaaddr info.rti_info[RTAX_IFA]
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#define brdaddr info.rti_info[RTAX_BRD]
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/*
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* It really doesn't make any sense at all for this code to share much
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* with raw_usrreq.c, since its functionality is so restricted. XXX
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*/
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static int
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rts_abort(struct socket *so)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_abort(so);
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splx(s);
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return error;
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}
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/* pru_accept is EOPNOTSUPP */
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static int
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rts_attach(struct socket *so, int proto, struct proc *p)
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{
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struct rawcb *rp;
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int s, error;
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if (sotorawcb(so) != 0)
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return EISCONN; /* XXX panic? */
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MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK); /* XXX */
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if (rp == 0)
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return ENOBUFS;
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bzero(rp, sizeof *rp);
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/*
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* The splnet() is necessary to block protocols from sending
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* error notifications (like RTM_REDIRECT or RTM_LOSING) while
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* this PCB is extant but incompletely initialized.
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* Probably we should try to do more of this work beforehand and
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* eliminate the spl.
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*/
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s = splnet();
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so->so_pcb = (caddr_t)rp;
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error = raw_usrreqs.pru_attach(so, proto, p);
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rp = sotorawcb(so);
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if (error) {
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splx(s);
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free(rp, M_PCB);
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return error;
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}
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switch(rp->rcb_proto.sp_protocol) {
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case AF_INET:
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route_cb.ip_count++;
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break;
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case AF_IPX:
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route_cb.ipx_count++;
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break;
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case AF_NS:
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route_cb.ns_count++;
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break;
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case AF_ISO:
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route_cb.iso_count++;
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break;
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}
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rp->rcb_faddr = &route_src;
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route_cb.any_count++;
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soisconnected(so);
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so->so_options |= SO_USELOOPBACK;
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splx(s);
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return 0;
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}
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static int
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rts_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */
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splx(s);
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return error;
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}
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static int
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rts_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */
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splx(s);
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return error;
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}
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/* pru_connect2 is EOPNOTSUPP */
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/* pru_control is EOPNOTSUPP */
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static int
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rts_detach(struct socket *so)
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{
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struct rawcb *rp = sotorawcb(so);
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int s, error;
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s = splnet();
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if (rp != 0) {
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switch(rp->rcb_proto.sp_protocol) {
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case AF_INET:
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route_cb.ip_count--;
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break;
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case AF_IPX:
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route_cb.ipx_count--;
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break;
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case AF_NS:
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route_cb.ns_count--;
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break;
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case AF_ISO:
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route_cb.iso_count--;
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break;
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}
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route_cb.any_count--;
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}
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error = raw_usrreqs.pru_detach(so);
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splx(s);
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return error;
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}
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static int
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rts_disconnect(struct socket *so)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_disconnect(so);
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splx(s);
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return error;
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}
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/* pru_listen is EOPNOTSUPP */
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static int
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rts_peeraddr(struct socket *so, struct sockaddr **nam)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_peeraddr(so, nam);
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splx(s);
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return error;
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}
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/* pru_rcvd is EOPNOTSUPP */
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/* pru_rcvoob is EOPNOTSUPP */
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static int
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rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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struct mbuf *control, struct proc *p)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_send(so, flags, m, nam, control, p);
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splx(s);
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return error;
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}
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/* pru_sense is null */
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static int
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rts_shutdown(struct socket *so)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_shutdown(so);
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splx(s);
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return error;
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}
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static int
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rts_sockaddr(struct socket *so, struct sockaddr **nam)
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{
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int s, error;
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s = splnet();
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error = raw_usrreqs.pru_sockaddr(so, nam);
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splx(s);
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return error;
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}
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static struct pr_usrreqs route_usrreqs = {
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rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect,
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pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect,
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pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp,
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rts_send, pru_sense_null, rts_shutdown, rts_sockaddr,
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sosend, soreceive, sopoll
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};
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/*ARGSUSED*/
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static int
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route_output(m, so)
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register struct mbuf *m;
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struct socket *so;
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{
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register struct rt_msghdr *rtm = 0;
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register struct rtentry *rt = 0;
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struct rtentry *saved_nrt = 0;
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struct radix_node_head *rnh;
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struct rt_addrinfo info;
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int len, error = 0;
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struct ifnet *ifp = 0;
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struct ifaddr *ifa = 0;
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#define senderr(e) { error = e; goto flush;}
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if (m == 0 || ((m->m_len < sizeof(long)) &&
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(m = m_pullup(m, sizeof(long))) == 0))
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return (ENOBUFS);
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if ((m->m_flags & M_PKTHDR) == 0)
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panic("route_output");
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len = m->m_pkthdr.len;
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if (len < sizeof(*rtm) ||
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len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
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dst = 0;
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senderr(EINVAL);
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}
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R_Malloc(rtm, struct rt_msghdr *, len);
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if (rtm == 0) {
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dst = 0;
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senderr(ENOBUFS);
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}
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m_copydata(m, 0, len, (caddr_t)rtm);
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if (rtm->rtm_version != RTM_VERSION) {
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dst = 0;
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senderr(EPROTONOSUPPORT);
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}
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rtm->rtm_pid = curproc->p_pid;
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info.rti_addrs = rtm->rtm_addrs;
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if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
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dst = 0;
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senderr(EINVAL);
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}
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if (dst == 0 || (dst->sa_family >= AF_MAX)
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|| (gate != 0 && (gate->sa_family >= AF_MAX)))
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senderr(EINVAL);
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if (genmask) {
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struct radix_node *t;
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t = rn_addmask((caddr_t)genmask, 0, 1);
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if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0)
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genmask = (struct sockaddr *)(t->rn_key);
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else
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senderr(ENOBUFS);
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}
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switch (rtm->rtm_type) {
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case RTM_ADD:
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if (gate == 0)
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senderr(EINVAL);
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error = rtrequest(RTM_ADD, dst, gate, netmask,
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rtm->rtm_flags, &saved_nrt);
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if (error == 0 && saved_nrt) {
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rt_setmetrics(rtm->rtm_inits,
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&rtm->rtm_rmx, &saved_nrt->rt_rmx);
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saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
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saved_nrt->rt_rmx.rmx_locks |=
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(rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
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saved_nrt->rt_refcnt--;
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saved_nrt->rt_genmask = genmask;
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}
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break;
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case RTM_DELETE:
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error = rtrequest(RTM_DELETE, dst, gate, netmask,
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rtm->rtm_flags, &saved_nrt);
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if (error == 0) {
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if ((rt = saved_nrt))
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rt->rt_refcnt++;
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goto report;
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}
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break;
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case RTM_GET:
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case RTM_CHANGE:
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case RTM_LOCK:
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if ((rnh = rt_tables[dst->sa_family]) == 0) {
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senderr(EAFNOSUPPORT);
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} else if ((rt = (struct rtentry *)
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rnh->rnh_lookup(dst, netmask, rnh)) != NULL)
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rt->rt_refcnt++;
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else
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senderr(ESRCH);
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switch(rtm->rtm_type) {
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case RTM_GET:
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report:
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dst = rt_key(rt);
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gate = rt->rt_gateway;
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netmask = rt_mask(rt);
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genmask = rt->rt_genmask;
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if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
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ifp = rt->rt_ifp;
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if (ifp) {
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ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
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ifaaddr = rt->rt_ifa->ifa_addr;
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rtm->rtm_index = ifp->if_index;
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} else {
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ifpaddr = 0;
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ifaaddr = 0;
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}
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}
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len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
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(struct walkarg *)0);
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if (len > rtm->rtm_msglen) {
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struct rt_msghdr *new_rtm;
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R_Malloc(new_rtm, struct rt_msghdr *, len);
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if (new_rtm == 0)
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senderr(ENOBUFS);
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Bcopy(rtm, new_rtm, rtm->rtm_msglen);
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Free(rtm); rtm = new_rtm;
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}
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(void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
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(struct walkarg *)0);
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rtm->rtm_flags = rt->rt_flags;
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rtm->rtm_rmx = rt->rt_rmx;
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rtm->rtm_addrs = info.rti_addrs;
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break;
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case RTM_CHANGE:
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if (gate && (error = rt_setgate(rt, rt_key(rt), gate)))
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senderr(error);
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/*
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* If they tried to change things but didn't specify
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* the required gateway, then just use the old one.
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* This can happen if the user tries to change the
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* flags on the default route without changing the
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* default gateway. Changing flags still doesn't work.
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*/
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if ((rt->rt_flags & RTF_GATEWAY) && !gate)
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gate = rt->rt_gateway;
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/* new gateway could require new ifaddr, ifp;
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flags may also be different; ifp may be specified
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by ll sockaddr when protocol address is ambiguous */
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if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) &&
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(ifp = ifa->ifa_ifp) && (ifaaddr || gate))
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ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate,
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ifp);
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else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) ||
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(gate && (ifa = ifa_ifwithroute(rt->rt_flags,
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rt_key(rt), gate))))
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ifp = ifa->ifa_ifp;
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if (ifa) {
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register struct ifaddr *oifa = rt->rt_ifa;
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if (oifa != ifa) {
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if (oifa && oifa->ifa_rtrequest)
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oifa->ifa_rtrequest(RTM_DELETE,
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rt, gate);
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IFAFREE(rt->rt_ifa);
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rt->rt_ifa = ifa;
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ifa->ifa_refcnt++;
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rt->rt_ifp = ifp;
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}
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}
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rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
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&rt->rt_rmx);
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if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
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rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate);
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if (genmask)
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rt->rt_genmask = genmask;
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/*
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* Fall into
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*/
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case RTM_LOCK:
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rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
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rt->rt_rmx.rmx_locks |=
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(rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
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break;
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}
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break;
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default:
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senderr(EOPNOTSUPP);
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}
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flush:
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if (rtm) {
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if (error)
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rtm->rtm_errno = error;
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else
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rtm->rtm_flags |= RTF_DONE;
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}
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if (rt)
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rtfree(rt);
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{
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register struct rawcb *rp = 0;
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/*
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* Check to see if we don't want our own messages.
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*/
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if ((so->so_options & SO_USELOOPBACK) == 0) {
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if (route_cb.any_count <= 1) {
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if (rtm)
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Free(rtm);
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m_freem(m);
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return (error);
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}
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/* There is another listener, so construct message */
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rp = sotorawcb(so);
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}
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if (rtm) {
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m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
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Free(rtm);
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}
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if (rp)
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rp->rcb_proto.sp_family = 0; /* Avoid us */
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if (dst)
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route_proto.sp_protocol = dst->sa_family;
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raw_input(m, &route_proto, &route_src, &route_dst);
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if (rp)
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rp->rcb_proto.sp_family = PF_ROUTE;
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}
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return (error);
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|
}
|
|
|
|
static void
|
|
rt_setmetrics(which, in, out)
|
|
u_long which;
|
|
register struct rt_metrics *in, *out;
|
|
{
|
|
#define metric(f, e) if (which & (f)) out->e = in->e;
|
|
metric(RTV_RPIPE, rmx_recvpipe);
|
|
metric(RTV_SPIPE, rmx_sendpipe);
|
|
metric(RTV_SSTHRESH, rmx_ssthresh);
|
|
metric(RTV_RTT, rmx_rtt);
|
|
metric(RTV_RTTVAR, rmx_rttvar);
|
|
metric(RTV_HOPCOUNT, rmx_hopcount);
|
|
metric(RTV_MTU, rmx_mtu);
|
|
metric(RTV_EXPIRE, rmx_expire);
|
|
#undef metric
|
|
}
|
|
|
|
#define ROUNDUP(a) \
|
|
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
|
|
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
|
|
|
|
|
|
/*
|
|
* Extract the addresses of the passed sockaddrs.
|
|
* Do a little sanity checking so as to avoid bad memory references.
|
|
* This data is derived straight from userland.
|
|
*/
|
|
static int
|
|
rt_xaddrs(cp, cplim, rtinfo)
|
|
register caddr_t cp, cplim;
|
|
register struct rt_addrinfo *rtinfo;
|
|
{
|
|
register struct sockaddr *sa;
|
|
register int i;
|
|
|
|
bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
|
|
for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
|
|
if ((rtinfo->rti_addrs & (1 << i)) == 0)
|
|
continue;
|
|
sa = (struct sockaddr *)cp;
|
|
/*
|
|
* It won't fit.
|
|
*/
|
|
if ( (cp + sa->sa_len) > cplim ) {
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* there are no more.. quit now
|
|
* If there are more bits, they are in error.
|
|
* I've seen this. route(1) can evidently generate these.
|
|
* This causes kernel to core dump.
|
|
* for compatibility, If we see this, point to a safe address.
|
|
*/
|
|
if (sa->sa_len == 0) {
|
|
rtinfo->rti_info[i] = &sa_zero;
|
|
return (0); /* should be EINVAL but for compat */
|
|
}
|
|
|
|
/* accept it */
|
|
rtinfo->rti_info[i] = sa;
|
|
ADVANCE(cp, sa);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct mbuf *
|
|
rt_msg1(type, rtinfo)
|
|
int type;
|
|
register struct rt_addrinfo *rtinfo;
|
|
{
|
|
register struct rt_msghdr *rtm;
|
|
register struct mbuf *m;
|
|
register int i;
|
|
register struct sockaddr *sa;
|
|
int len, dlen;
|
|
|
|
m = m_gethdr(M_DONTWAIT, MT_DATA);
|
|
if (m == 0)
|
|
return (m);
|
|
switch (type) {
|
|
|
|
case RTM_DELADDR:
|
|
case RTM_NEWADDR:
|
|
len = sizeof(struct ifa_msghdr);
|
|
break;
|
|
|
|
case RTM_DELMADDR:
|
|
case RTM_NEWMADDR:
|
|
len = sizeof(struct ifma_msghdr);
|
|
break;
|
|
|
|
case RTM_IFINFO:
|
|
len = sizeof(struct if_msghdr);
|
|
break;
|
|
|
|
default:
|
|
len = sizeof(struct rt_msghdr);
|
|
}
|
|
if (len > MHLEN)
|
|
panic("rt_msg1");
|
|
m->m_pkthdr.len = m->m_len = len;
|
|
m->m_pkthdr.rcvif = 0;
|
|
rtm = mtod(m, struct rt_msghdr *);
|
|
bzero((caddr_t)rtm, len);
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
if ((sa = rtinfo->rti_info[i]) == NULL)
|
|
continue;
|
|
rtinfo->rti_addrs |= (1 << i);
|
|
dlen = ROUNDUP(sa->sa_len);
|
|
m_copyback(m, len, dlen, (caddr_t)sa);
|
|
len += dlen;
|
|
}
|
|
if (m->m_pkthdr.len != len) {
|
|
m_freem(m);
|
|
return (NULL);
|
|
}
|
|
rtm->rtm_msglen = len;
|
|
rtm->rtm_version = RTM_VERSION;
|
|
rtm->rtm_type = type;
|
|
return (m);
|
|
}
|
|
|
|
static int
|
|
rt_msg2(type, rtinfo, cp, w)
|
|
int type;
|
|
register struct rt_addrinfo *rtinfo;
|
|
caddr_t cp;
|
|
struct walkarg *w;
|
|
{
|
|
register int i;
|
|
int len, dlen, second_time = 0;
|
|
caddr_t cp0;
|
|
|
|
rtinfo->rti_addrs = 0;
|
|
again:
|
|
switch (type) {
|
|
|
|
case RTM_DELADDR:
|
|
case RTM_NEWADDR:
|
|
len = sizeof(struct ifa_msghdr);
|
|
break;
|
|
|
|
case RTM_IFINFO:
|
|
len = sizeof(struct if_msghdr);
|
|
break;
|
|
|
|
default:
|
|
len = sizeof(struct rt_msghdr);
|
|
}
|
|
cp0 = cp;
|
|
if (cp0)
|
|
cp += len;
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
register struct sockaddr *sa;
|
|
|
|
if ((sa = rtinfo->rti_info[i]) == 0)
|
|
continue;
|
|
rtinfo->rti_addrs |= (1 << i);
|
|
dlen = ROUNDUP(sa->sa_len);
|
|
if (cp) {
|
|
bcopy((caddr_t)sa, cp, (unsigned)dlen);
|
|
cp += dlen;
|
|
}
|
|
len += dlen;
|
|
}
|
|
if (cp == 0 && w != NULL && !second_time) {
|
|
register struct walkarg *rw = w;
|
|
|
|
if (rw->w_req) {
|
|
if (rw->w_tmemsize < len) {
|
|
if (rw->w_tmem)
|
|
free(rw->w_tmem, M_RTABLE);
|
|
rw->w_tmem = (caddr_t)
|
|
malloc(len, M_RTABLE, M_NOWAIT);
|
|
if (rw->w_tmem)
|
|
rw->w_tmemsize = len;
|
|
}
|
|
if (rw->w_tmem) {
|
|
cp = rw->w_tmem;
|
|
second_time = 1;
|
|
goto again;
|
|
}
|
|
}
|
|
}
|
|
if (cp) {
|
|
register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
|
|
|
|
rtm->rtm_version = RTM_VERSION;
|
|
rtm->rtm_type = type;
|
|
rtm->rtm_msglen = len;
|
|
}
|
|
return (len);
|
|
}
|
|
|
|
/*
|
|
* This routine is called to generate a message from the routing
|
|
* socket indicating that a redirect has occured, a routing lookup
|
|
* has failed, or that a protocol has detected timeouts to a particular
|
|
* destination.
|
|
*/
|
|
void
|
|
rt_missmsg(type, rtinfo, flags, error)
|
|
int type, flags, error;
|
|
register struct rt_addrinfo *rtinfo;
|
|
{
|
|
register struct rt_msghdr *rtm;
|
|
register struct mbuf *m;
|
|
struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
|
|
|
|
if (route_cb.any_count == 0)
|
|
return;
|
|
m = rt_msg1(type, rtinfo);
|
|
if (m == 0)
|
|
return;
|
|
rtm = mtod(m, struct rt_msghdr *);
|
|
rtm->rtm_flags = RTF_DONE | flags;
|
|
rtm->rtm_errno = error;
|
|
rtm->rtm_addrs = rtinfo->rti_addrs;
|
|
route_proto.sp_protocol = sa ? sa->sa_family : 0;
|
|
raw_input(m, &route_proto, &route_src, &route_dst);
|
|
}
|
|
|
|
/*
|
|
* This routine is called to generate a message from the routing
|
|
* socket indicating that the status of a network interface has changed.
|
|
*/
|
|
void
|
|
rt_ifmsg(ifp)
|
|
register struct ifnet *ifp;
|
|
{
|
|
register struct if_msghdr *ifm;
|
|
struct mbuf *m;
|
|
struct rt_addrinfo info;
|
|
|
|
if (route_cb.any_count == 0)
|
|
return;
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
m = rt_msg1(RTM_IFINFO, &info);
|
|
if (m == 0)
|
|
return;
|
|
ifm = mtod(m, struct if_msghdr *);
|
|
ifm->ifm_index = ifp->if_index;
|
|
ifm->ifm_flags = (u_short)ifp->if_flags;
|
|
ifm->ifm_data = ifp->if_data;
|
|
ifm->ifm_addrs = 0;
|
|
route_proto.sp_protocol = 0;
|
|
raw_input(m, &route_proto, &route_src, &route_dst);
|
|
}
|
|
|
|
/*
|
|
* This is called to generate messages from the routing socket
|
|
* indicating a network interface has had addresses associated with it.
|
|
* if we ever reverse the logic and replace messages TO the routing
|
|
* socket indicate a request to configure interfaces, then it will
|
|
* be unnecessary as the routing socket will automatically generate
|
|
* copies of it.
|
|
*/
|
|
void
|
|
rt_newaddrmsg(cmd, ifa, error, rt)
|
|
int cmd, error;
|
|
register struct ifaddr *ifa;
|
|
register struct rtentry *rt;
|
|
{
|
|
struct rt_addrinfo info;
|
|
struct sockaddr *sa = 0;
|
|
int pass;
|
|
struct mbuf *m = 0;
|
|
struct ifnet *ifp = ifa->ifa_ifp;
|
|
|
|
if (route_cb.any_count == 0)
|
|
return;
|
|
for (pass = 1; pass < 3; pass++) {
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
if ((cmd == RTM_ADD && pass == 1) ||
|
|
(cmd == RTM_DELETE && pass == 2)) {
|
|
register struct ifa_msghdr *ifam;
|
|
int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
|
|
|
|
ifaaddr = sa = ifa->ifa_addr;
|
|
ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
|
|
netmask = ifa->ifa_netmask;
|
|
brdaddr = ifa->ifa_dstaddr;
|
|
if ((m = rt_msg1(ncmd, &info)) == NULL)
|
|
continue;
|
|
ifam = mtod(m, struct ifa_msghdr *);
|
|
ifam->ifam_index = ifp->if_index;
|
|
ifam->ifam_metric = ifa->ifa_metric;
|
|
ifam->ifam_flags = ifa->ifa_flags;
|
|
ifam->ifam_addrs = info.rti_addrs;
|
|
}
|
|
if ((cmd == RTM_ADD && pass == 2) ||
|
|
(cmd == RTM_DELETE && pass == 1)) {
|
|
register struct rt_msghdr *rtm;
|
|
|
|
if (rt == 0)
|
|
continue;
|
|
netmask = rt_mask(rt);
|
|
dst = sa = rt_key(rt);
|
|
gate = rt->rt_gateway;
|
|
if ((m = rt_msg1(cmd, &info)) == NULL)
|
|
continue;
|
|
rtm = mtod(m, struct rt_msghdr *);
|
|
rtm->rtm_index = ifp->if_index;
|
|
rtm->rtm_flags |= rt->rt_flags;
|
|
rtm->rtm_errno = error;
|
|
rtm->rtm_addrs = info.rti_addrs;
|
|
}
|
|
route_proto.sp_protocol = sa ? sa->sa_family : 0;
|
|
raw_input(m, &route_proto, &route_src, &route_dst);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is the analogue to the rt_newaddrmsg which performs the same
|
|
* function but for multicast group memberhips. This is easier since
|
|
* there is no route state to worry about.
|
|
*/
|
|
void
|
|
rt_newmaddrmsg(cmd, ifma)
|
|
int cmd;
|
|
struct ifmultiaddr *ifma;
|
|
{
|
|
struct rt_addrinfo info;
|
|
struct mbuf *m = 0;
|
|
struct ifnet *ifp = ifma->ifma_ifp;
|
|
struct ifma_msghdr *ifmam;
|
|
|
|
if (route_cb.any_count == 0)
|
|
return;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
ifaaddr = ifma->ifma_addr;
|
|
ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
|
|
/*
|
|
* If a link-layer address is present, present it as a ``gateway''
|
|
* (similarly to how ARP entries, e.g., are presented).
|
|
*/
|
|
gate = ifma->ifma_lladdr;
|
|
if ((m = rt_msg1(cmd, &info)) == NULL)
|
|
return;
|
|
ifmam = mtod(m, struct ifma_msghdr *);
|
|
ifmam->ifmam_index = ifp->if_index;
|
|
ifmam->ifmam_addrs = info.rti_addrs;
|
|
route_proto.sp_protocol = ifma->ifma_addr->sa_family;
|
|
raw_input(m, &route_proto, &route_src, &route_dst);
|
|
}
|
|
|
|
/*
|
|
* This is used in dumping the kernel table via sysctl().
|
|
*/
|
|
int
|
|
sysctl_dumpentry(rn, vw)
|
|
struct radix_node *rn;
|
|
void *vw;
|
|
{
|
|
register struct walkarg *w = vw;
|
|
register struct rtentry *rt = (struct rtentry *)rn;
|
|
int error = 0, size;
|
|
struct rt_addrinfo info;
|
|
|
|
if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
|
|
return 0;
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
dst = rt_key(rt);
|
|
gate = rt->rt_gateway;
|
|
netmask = rt_mask(rt);
|
|
genmask = rt->rt_genmask;
|
|
size = rt_msg2(RTM_GET, &info, 0, w);
|
|
if (w->w_req && w->w_tmem) {
|
|
register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
|
|
|
|
rtm->rtm_flags = rt->rt_flags;
|
|
rtm->rtm_use = rt->rt_use;
|
|
rtm->rtm_rmx = rt->rt_rmx;
|
|
rtm->rtm_index = rt->rt_ifp->if_index;
|
|
rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
|
|
rtm->rtm_addrs = info.rti_addrs;
|
|
error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
|
|
return (error);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sysctl_iflist(af, w)
|
|
int af;
|
|
register struct walkarg *w;
|
|
{
|
|
register struct ifnet *ifp;
|
|
register struct ifaddr *ifa;
|
|
struct rt_addrinfo info;
|
|
int len, error = 0;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) {
|
|
if (w->w_arg && w->w_arg != ifp->if_index)
|
|
continue;
|
|
ifa = ifp->if_addrhead.tqh_first;
|
|
ifpaddr = ifa->ifa_addr;
|
|
len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
|
|
ifpaddr = 0;
|
|
if (w->w_req && w->w_tmem) {
|
|
register struct if_msghdr *ifm;
|
|
|
|
ifm = (struct if_msghdr *)w->w_tmem;
|
|
ifm->ifm_index = ifp->if_index;
|
|
ifm->ifm_flags = (u_short)ifp->if_flags;
|
|
ifm->ifm_data = ifp->if_data;
|
|
ifm->ifm_addrs = info.rti_addrs;
|
|
error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
while ((ifa = ifa->ifa_link.tqe_next) != 0) {
|
|
if (af && af != ifa->ifa_addr->sa_family)
|
|
continue;
|
|
ifaaddr = ifa->ifa_addr;
|
|
netmask = ifa->ifa_netmask;
|
|
brdaddr = ifa->ifa_dstaddr;
|
|
len = rt_msg2(RTM_NEWADDR, &info, 0, w);
|
|
if (w->w_req && w->w_tmem) {
|
|
register struct ifa_msghdr *ifam;
|
|
|
|
ifam = (struct ifa_msghdr *)w->w_tmem;
|
|
ifam->ifam_index = ifa->ifa_ifp->if_index;
|
|
ifam->ifam_flags = ifa->ifa_flags;
|
|
ifam->ifam_metric = ifa->ifa_metric;
|
|
ifam->ifam_addrs = info.rti_addrs;
|
|
error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
ifaaddr = netmask = brdaddr = 0;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_rtsock SYSCTL_HANDLER_ARGS
|
|
{
|
|
int *name = (int *)arg1;
|
|
u_int namelen = arg2;
|
|
register struct radix_node_head *rnh;
|
|
int i, s, error = EINVAL;
|
|
u_char af;
|
|
struct walkarg w;
|
|
|
|
name ++;
|
|
namelen--;
|
|
if (req->newptr)
|
|
return (EPERM);
|
|
if (namelen != 3)
|
|
return (EINVAL);
|
|
af = name[0];
|
|
Bzero(&w, sizeof(w));
|
|
w.w_op = name[1];
|
|
w.w_arg = name[2];
|
|
w.w_req = req;
|
|
|
|
s = splnet();
|
|
switch (w.w_op) {
|
|
|
|
case NET_RT_DUMP:
|
|
case NET_RT_FLAGS:
|
|
for (i = 1; i <= AF_MAX; i++)
|
|
if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
|
|
(error = rnh->rnh_walktree(rnh,
|
|
sysctl_dumpentry, &w)))
|
|
break;
|
|
break;
|
|
|
|
case NET_RT_IFLIST:
|
|
error = sysctl_iflist(af, &w);
|
|
}
|
|
splx(s);
|
|
if (w.w_tmem)
|
|
free(w.w_tmem, M_RTABLE);
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
|
|
|
|
/*
|
|
* Definitions of protocols supported in the ROUTE domain.
|
|
*/
|
|
|
|
extern struct domain routedomain; /* or at least forward */
|
|
|
|
static struct protosw routesw[] = {
|
|
{ SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
|
|
0, route_output, raw_ctlinput, 0,
|
|
0,
|
|
raw_init, 0, 0, 0,
|
|
&route_usrreqs
|
|
}
|
|
};
|
|
|
|
static struct domain routedomain =
|
|
{ PF_ROUTE, "route", route_init, 0, 0,
|
|
routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
|
|
|
|
DOMAIN_SET(route);
|