1695 lines
42 KiB
C
1695 lines
42 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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* 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 8.7 (Berkeley) 10/12/95
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* $FreeBSD$
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*/
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#include "opt_compat.h"
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#include "opt_sctp.h"
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#include "opt_mpath.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/jail.h>
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#include <sys/kernel.h>
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#include <sys/domain.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/rwlock.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_llatbl.h>
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#include <net/if_types.h>
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#include <net/netisr.h>
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#include <net/raw_cb.h>
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#include <net/route.h>
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#include <net/vnet.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#ifdef INET6
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#include <netinet6/scope6_var.h>
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#endif
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#if defined(INET) || defined(INET6)
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#ifdef SCTP
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extern void sctp_addr_change(struct ifaddr *ifa, int cmd);
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#endif /* SCTP */
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#endif
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#ifdef COMPAT_FREEBSD32
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#include <sys/mount.h>
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#include <compat/freebsd32/freebsd32.h>
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struct if_data32 {
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uint8_t ifi_type;
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uint8_t ifi_physical;
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uint8_t ifi_addrlen;
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uint8_t ifi_hdrlen;
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uint8_t ifi_link_state;
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uint8_t ifi_spare_char1;
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uint8_t ifi_spare_char2;
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uint8_t ifi_datalen;
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uint32_t ifi_mtu;
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uint32_t ifi_metric;
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uint32_t ifi_baudrate;
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uint32_t ifi_ipackets;
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uint32_t ifi_ierrors;
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uint32_t ifi_opackets;
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uint32_t ifi_oerrors;
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uint32_t ifi_collisions;
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uint32_t ifi_ibytes;
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uint32_t ifi_obytes;
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uint32_t ifi_imcasts;
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uint32_t ifi_omcasts;
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uint32_t ifi_iqdrops;
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uint32_t ifi_noproto;
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uint32_t ifi_hwassist;
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int32_t ifi_epoch;
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struct timeval32 ifi_lastchange;
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};
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struct if_msghdr32 {
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uint16_t ifm_msglen;
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uint8_t ifm_version;
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uint8_t ifm_type;
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int32_t ifm_addrs;
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int32_t ifm_flags;
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uint16_t ifm_index;
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struct if_data32 ifm_data;
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};
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#endif
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MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
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/* NB: these are not modified */
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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 {
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int ip_count; /* attached w/ AF_INET */
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int ip6_count; /* attached w/ AF_INET6 */
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int ipx_count; /* attached w/ AF_IPX */
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int any_count; /* total attached */
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} route_cb;
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struct mtx rtsock_mtx;
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MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF);
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#define RTSOCK_LOCK() mtx_lock(&rtsock_mtx)
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#define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx)
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#define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED)
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SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, "");
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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 void rts_input(struct mbuf *m);
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static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo);
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static int rt_msg2(int type, struct rt_addrinfo *rtinfo,
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caddr_t cp, struct walkarg *w);
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static int rt_xaddrs(caddr_t cp, caddr_t cplim,
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struct rt_addrinfo *rtinfo);
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static int sysctl_dumpentry(struct radix_node *rn, void *vw);
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static int sysctl_iflist(int af, struct walkarg *w);
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static int sysctl_ifmalist(int af, struct walkarg *w);
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static int route_output(struct mbuf *m, struct socket *so);
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static void rt_setmetrics(u_long which, const struct rt_metrics *in,
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struct rt_metrics_lite *out);
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static void rt_getmetrics(const struct rt_metrics_lite *in,
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struct rt_metrics *out);
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static void rt_dispatch(struct mbuf *, const struct sockaddr *);
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static struct netisr_handler rtsock_nh = {
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.nh_name = "rtsock",
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.nh_handler = rts_input,
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.nh_proto = NETISR_ROUTE,
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.nh_policy = NETISR_POLICY_SOURCE,
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};
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static int
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sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS)
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{
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int error, qlimit;
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netisr_getqlimit(&rtsock_nh, &qlimit);
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error = sysctl_handle_int(oidp, &qlimit, 0, req);
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if (error || !req->newptr)
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return (error);
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if (qlimit < 1)
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return (EINVAL);
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return (netisr_setqlimit(&rtsock_nh, qlimit));
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}
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SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW,
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0, 0, sysctl_route_netisr_maxqlen, "I",
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"maximum routing socket dispatch queue length");
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static void
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rts_init(void)
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{
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int tmp;
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if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp))
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rtsock_nh.nh_qlimit = tmp;
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netisr_register(&rtsock_nh);
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}
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SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0);
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static void
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rts_input(struct mbuf *m)
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{
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struct sockproto route_proto;
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unsigned short *family;
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struct m_tag *tag;
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route_proto.sp_family = PF_ROUTE;
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tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
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if (tag != NULL) {
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family = (unsigned short *)(tag + 1);
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route_proto.sp_protocol = *family;
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m_tag_delete(m, tag);
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} else
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route_proto.sp_protocol = 0;
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raw_input(m, &route_proto, &route_src);
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}
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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 void
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rts_abort(struct socket *so)
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{
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raw_usrreqs.pru_abort(so);
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}
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static void
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rts_close(struct socket *so)
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{
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raw_usrreqs.pru_close(so);
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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 thread *td)
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{
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struct rawcb *rp;
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int s, error;
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KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL"));
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/* XXX */
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rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
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if (rp == NULL)
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return ENOBUFS;
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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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so->so_fibnum = td->td_proc->p_fibnum;
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error = raw_attach(so, proto);
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rp = sotorawcb(so);
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if (error) {
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splx(s);
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so->so_pcb = NULL;
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free(rp, M_PCB);
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return error;
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}
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RTSOCK_LOCK();
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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_INET6:
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route_cb.ip6_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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}
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route_cb.any_count++;
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RTSOCK_UNLOCK();
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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 thread *td)
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{
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return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */
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}
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static int
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rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
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{
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return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */
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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 void
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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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KASSERT(rp != NULL, ("rts_detach: rp == NULL"));
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RTSOCK_LOCK();
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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_INET6:
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route_cb.ip6_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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}
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route_cb.any_count--;
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RTSOCK_UNLOCK();
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raw_usrreqs.pru_detach(so);
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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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return (raw_usrreqs.pru_disconnect(so));
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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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return (raw_usrreqs.pru_peeraddr(so, nam));
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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 thread *td)
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{
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return (raw_usrreqs.pru_send(so, flags, m, nam, control, td));
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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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return (raw_usrreqs.pru_shutdown(so));
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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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return (raw_usrreqs.pru_sockaddr(so, nam));
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}
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static struct pr_usrreqs route_usrreqs = {
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.pru_abort = rts_abort,
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.pru_attach = rts_attach,
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.pru_bind = rts_bind,
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.pru_connect = rts_connect,
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.pru_detach = rts_detach,
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.pru_disconnect = rts_disconnect,
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.pru_peeraddr = rts_peeraddr,
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.pru_send = rts_send,
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.pru_shutdown = rts_shutdown,
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.pru_sockaddr = rts_sockaddr,
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.pru_close = rts_close,
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};
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#ifndef _SOCKADDR_UNION_DEFINED
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#define _SOCKADDR_UNION_DEFINED
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/*
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* The union of all possible address formats we handle.
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*/
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union sockaddr_union {
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struct sockaddr sa;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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};
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#endif /* _SOCKADDR_UNION_DEFINED */
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static int
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rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp,
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struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred)
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{
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/* First, see if the returned address is part of the jail. */
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if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) {
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info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
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return (0);
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}
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switch (info->rti_info[RTAX_DST]->sa_family) {
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#ifdef INET
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case AF_INET:
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{
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struct in_addr ia;
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struct ifaddr *ifa;
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int found;
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found = 0;
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/*
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* Try to find an address on the given outgoing interface
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* that belongs to the jail.
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*/
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IF_ADDR_LOCK(ifp);
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TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
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struct sockaddr *sa;
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sa = ifa->ifa_addr;
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if (sa->sa_family != AF_INET)
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continue;
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ia = ((struct sockaddr_in *)sa)->sin_addr;
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if (prison_check_ip4(cred, &ia) == 0) {
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found = 1;
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break;
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}
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}
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IF_ADDR_UNLOCK(ifp);
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if (!found) {
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/*
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* As a last resort return the 'default' jail address.
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*/
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ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)->
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sin_addr;
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if (prison_get_ip4(cred, &ia) != 0)
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return (ESRCH);
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}
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bzero(&saun->sin, sizeof(struct sockaddr_in));
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saun->sin.sin_len = sizeof(struct sockaddr_in);
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saun->sin.sin_family = AF_INET;
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saun->sin.sin_addr.s_addr = ia.s_addr;
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info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
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break;
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}
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#endif
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#ifdef INET6
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case AF_INET6:
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{
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struct in6_addr ia6;
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struct ifaddr *ifa;
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int found;
|
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found = 0;
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/*
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* Try to find an address on the given outgoing interface
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* that belongs to the jail.
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*/
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IF_ADDR_LOCK(ifp);
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TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
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struct sockaddr *sa;
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sa = ifa->ifa_addr;
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if (sa->sa_family != AF_INET6)
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continue;
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bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
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&ia6, sizeof(struct in6_addr));
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if (prison_check_ip6(cred, &ia6) == 0) {
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found = 1;
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break;
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}
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}
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IF_ADDR_UNLOCK(ifp);
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if (!found) {
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/*
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* As a last resort return the 'default' jail address.
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*/
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ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)->
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sin6_addr;
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if (prison_get_ip6(cred, &ia6) != 0)
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return (ESRCH);
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}
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bzero(&saun->sin6, sizeof(struct sockaddr_in6));
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saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
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saun->sin6.sin6_family = AF_INET6;
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bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
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if (sa6_recoverscope(&saun->sin6) != 0)
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return (ESRCH);
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info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
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break;
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}
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#endif
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default:
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return (ESRCH);
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}
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return (0);
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}
|
|
|
|
/*ARGSUSED*/
|
|
static int
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route_output(struct mbuf *m, struct socket *so)
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|
{
|
|
#define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0)
|
|
struct rt_msghdr *rtm = NULL;
|
|
struct rtentry *rt = NULL;
|
|
struct radix_node_head *rnh;
|
|
struct rt_addrinfo info;
|
|
int len, error = 0;
|
|
struct ifnet *ifp = NULL;
|
|
union sockaddr_union saun;
|
|
|
|
#define senderr(e) { error = e; goto flush;}
|
|
if (m == NULL || ((m->m_len < sizeof(long)) &&
|
|
(m = m_pullup(m, sizeof(long))) == NULL))
|
|
return (ENOBUFS);
|
|
if ((m->m_flags & M_PKTHDR) == 0)
|
|
panic("route_output");
|
|
len = m->m_pkthdr.len;
|
|
if (len < sizeof(*rtm) ||
|
|
len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
|
|
info.rti_info[RTAX_DST] = NULL;
|
|
senderr(EINVAL);
|
|
}
|
|
R_Malloc(rtm, struct rt_msghdr *, len);
|
|
if (rtm == NULL) {
|
|
info.rti_info[RTAX_DST] = NULL;
|
|
senderr(ENOBUFS);
|
|
}
|
|
m_copydata(m, 0, len, (caddr_t)rtm);
|
|
if (rtm->rtm_version != RTM_VERSION) {
|
|
info.rti_info[RTAX_DST] = NULL;
|
|
senderr(EPROTONOSUPPORT);
|
|
}
|
|
rtm->rtm_pid = curproc->p_pid;
|
|
bzero(&info, sizeof(info));
|
|
info.rti_addrs = rtm->rtm_addrs;
|
|
if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
|
|
info.rti_info[RTAX_DST] = NULL;
|
|
senderr(EINVAL);
|
|
}
|
|
info.rti_flags = rtm->rtm_flags;
|
|
if (info.rti_info[RTAX_DST] == NULL ||
|
|
info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
|
|
(info.rti_info[RTAX_GATEWAY] != NULL &&
|
|
info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
|
|
senderr(EINVAL);
|
|
/*
|
|
* Verify that the caller has the appropriate privilege; RTM_GET
|
|
* is the only operation the non-superuser is allowed.
|
|
*/
|
|
if (rtm->rtm_type != RTM_GET) {
|
|
error = priv_check(curthread, PRIV_NET_ROUTE);
|
|
if (error)
|
|
senderr(error);
|
|
}
|
|
|
|
/*
|
|
* The given gateway address may be an interface address.
|
|
* For example, issuing a "route change" command on a route
|
|
* entry that was created from a tunnel, and the gateway
|
|
* address given is the local end point. In this case the
|
|
* RTF_GATEWAY flag must be cleared or the destination will
|
|
* not be reachable even though there is no error message.
|
|
*/
|
|
if (info.rti_info[RTAX_GATEWAY] != NULL &&
|
|
info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
|
|
struct route gw_ro;
|
|
|
|
bzero(&gw_ro, sizeof(gw_ro));
|
|
gw_ro.ro_dst = *info.rti_info[RTAX_GATEWAY];
|
|
rtalloc_ign_fib(&gw_ro, 0, so->so_fibnum);
|
|
/*
|
|
* A host route through the loopback interface is
|
|
* installed for each interface adddress. In pre 8.0
|
|
* releases the interface address of a PPP link type
|
|
* is not reachable locally. This behavior is fixed as
|
|
* part of the new L2/L3 redesign and rewrite work. The
|
|
* signature of this interface address route is the
|
|
* AF_LINK sa_family type of the rt_gateway, and the
|
|
* rt_ifp has the IFF_LOOPBACK flag set.
|
|
*/
|
|
if (gw_ro.ro_rt != NULL &&
|
|
gw_ro.ro_rt->rt_gateway->sa_family == AF_LINK &&
|
|
gw_ro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)
|
|
info.rti_flags &= ~RTF_GATEWAY;
|
|
if (gw_ro.ro_rt != NULL)
|
|
RTFREE(gw_ro.ro_rt);
|
|
}
|
|
|
|
switch (rtm->rtm_type) {
|
|
struct rtentry *saved_nrt;
|
|
|
|
case RTM_ADD:
|
|
if (info.rti_info[RTAX_GATEWAY] == NULL)
|
|
senderr(EINVAL);
|
|
saved_nrt = NULL;
|
|
|
|
/* support for new ARP code */
|
|
if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK &&
|
|
(rtm->rtm_flags & RTF_LLDATA) != 0) {
|
|
error = lla_rt_output(rtm, &info);
|
|
break;
|
|
}
|
|
error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt,
|
|
so->so_fibnum);
|
|
if (error == 0 && saved_nrt) {
|
|
RT_LOCK(saved_nrt);
|
|
rt_setmetrics(rtm->rtm_inits,
|
|
&rtm->rtm_rmx, &saved_nrt->rt_rmx);
|
|
rtm->rtm_index = saved_nrt->rt_ifp->if_index;
|
|
RT_REMREF(saved_nrt);
|
|
RT_UNLOCK(saved_nrt);
|
|
}
|
|
break;
|
|
|
|
case RTM_DELETE:
|
|
saved_nrt = NULL;
|
|
/* support for new ARP code */
|
|
if (info.rti_info[RTAX_GATEWAY] &&
|
|
(info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) &&
|
|
(rtm->rtm_flags & RTF_LLDATA) != 0) {
|
|
error = lla_rt_output(rtm, &info);
|
|
break;
|
|
}
|
|
error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt,
|
|
so->so_fibnum);
|
|
if (error == 0) {
|
|
RT_LOCK(saved_nrt);
|
|
rt = saved_nrt;
|
|
goto report;
|
|
}
|
|
break;
|
|
|
|
case RTM_GET:
|
|
case RTM_CHANGE:
|
|
case RTM_LOCK:
|
|
rnh = rt_tables_get_rnh(so->so_fibnum,
|
|
info.rti_info[RTAX_DST]->sa_family);
|
|
if (rnh == NULL)
|
|
senderr(EAFNOSUPPORT);
|
|
RADIX_NODE_HEAD_RLOCK(rnh);
|
|
rt = (struct rtentry *) rnh->rnh_lookup(info.rti_info[RTAX_DST],
|
|
info.rti_info[RTAX_NETMASK], rnh);
|
|
if (rt == NULL) { /* XXX looks bogus */
|
|
RADIX_NODE_HEAD_RUNLOCK(rnh);
|
|
senderr(ESRCH);
|
|
}
|
|
#ifdef RADIX_MPATH
|
|
/*
|
|
* for RTM_CHANGE/LOCK, if we got multipath routes,
|
|
* we require users to specify a matching RTAX_GATEWAY.
|
|
*
|
|
* for RTM_GET, gate is optional even with multipath.
|
|
* if gate == NULL the first match is returned.
|
|
* (no need to call rt_mpath_matchgate if gate == NULL)
|
|
*/
|
|
if (rn_mpath_capable(rnh) &&
|
|
(rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) {
|
|
rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]);
|
|
if (!rt) {
|
|
RADIX_NODE_HEAD_RUNLOCK(rnh);
|
|
senderr(ESRCH);
|
|
}
|
|
}
|
|
#endif
|
|
/*
|
|
* If performing proxied L2 entry insertion, and
|
|
* the actual PPP host entry is found, perform
|
|
* another search to retrieve the prefix route of
|
|
* the local end point of the PPP link.
|
|
*/
|
|
if (rtm->rtm_flags & RTF_ANNOUNCE) {
|
|
struct sockaddr laddr;
|
|
|
|
if (rt->rt_ifp != NULL &&
|
|
rt->rt_ifp->if_type == IFT_PROPVIRTUAL) {
|
|
struct ifaddr *ifa;
|
|
|
|
ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1);
|
|
if (ifa != NULL)
|
|
rt_maskedcopy(ifa->ifa_addr,
|
|
&laddr,
|
|
ifa->ifa_netmask);
|
|
} else
|
|
rt_maskedcopy(rt->rt_ifa->ifa_addr,
|
|
&laddr,
|
|
rt->rt_ifa->ifa_netmask);
|
|
/*
|
|
* refactor rt and no lock operation necessary
|
|
*/
|
|
rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, rnh);
|
|
if (rt == NULL) {
|
|
RADIX_NODE_HEAD_RUNLOCK(rnh);
|
|
senderr(ESRCH);
|
|
}
|
|
}
|
|
RT_LOCK(rt);
|
|
RT_ADDREF(rt);
|
|
RADIX_NODE_HEAD_RUNLOCK(rnh);
|
|
|
|
/*
|
|
* Fix for PR: 82974
|
|
*
|
|
* RTM_CHANGE/LOCK need a perfect match, rn_lookup()
|
|
* returns a perfect match in case a netmask is
|
|
* specified. For host routes only a longest prefix
|
|
* match is returned so it is necessary to compare the
|
|
* existence of the netmask. If both have a netmask
|
|
* rnh_lookup() did a perfect match and if none of them
|
|
* have a netmask both are host routes which is also a
|
|
* perfect match.
|
|
*/
|
|
|
|
if (rtm->rtm_type != RTM_GET &&
|
|
(!rt_mask(rt) != !info.rti_info[RTAX_NETMASK])) {
|
|
RT_UNLOCK(rt);
|
|
senderr(ESRCH);
|
|
}
|
|
|
|
switch(rtm->rtm_type) {
|
|
|
|
case RTM_GET:
|
|
report:
|
|
RT_LOCK_ASSERT(rt);
|
|
if ((rt->rt_flags & RTF_HOST) == 0
|
|
? jailed_without_vnet(curthread->td_ucred)
|
|
: prison_if(curthread->td_ucred,
|
|
rt_key(rt)) != 0) {
|
|
RT_UNLOCK(rt);
|
|
senderr(ESRCH);
|
|
}
|
|
info.rti_info[RTAX_DST] = rt_key(rt);
|
|
info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
|
|
info.rti_info[RTAX_NETMASK] = rt_mask(rt);
|
|
info.rti_info[RTAX_GENMASK] = 0;
|
|
if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
|
|
ifp = rt->rt_ifp;
|
|
if (ifp) {
|
|
info.rti_info[RTAX_IFP] =
|
|
ifp->if_addr->ifa_addr;
|
|
error = rtm_get_jailed(&info, ifp, rt,
|
|
&saun, curthread->td_ucred);
|
|
if (error != 0) {
|
|
RT_UNLOCK(rt);
|
|
senderr(error);
|
|
}
|
|
if (ifp->if_flags & IFF_POINTOPOINT)
|
|
info.rti_info[RTAX_BRD] =
|
|
rt->rt_ifa->ifa_dstaddr;
|
|
rtm->rtm_index = ifp->if_index;
|
|
} else {
|
|
info.rti_info[RTAX_IFP] = NULL;
|
|
info.rti_info[RTAX_IFA] = NULL;
|
|
}
|
|
} else if ((ifp = rt->rt_ifp) != NULL) {
|
|
rtm->rtm_index = ifp->if_index;
|
|
}
|
|
len = rt_msg2(rtm->rtm_type, &info, NULL, NULL);
|
|
if (len > rtm->rtm_msglen) {
|
|
struct rt_msghdr *new_rtm;
|
|
R_Malloc(new_rtm, struct rt_msghdr *, len);
|
|
if (new_rtm == NULL) {
|
|
RT_UNLOCK(rt);
|
|
senderr(ENOBUFS);
|
|
}
|
|
bcopy(rtm, new_rtm, rtm->rtm_msglen);
|
|
Free(rtm); rtm = new_rtm;
|
|
}
|
|
(void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL);
|
|
rtm->rtm_flags = rt->rt_flags;
|
|
rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
|
|
rtm->rtm_addrs = info.rti_addrs;
|
|
break;
|
|
|
|
case RTM_CHANGE:
|
|
/*
|
|
* New gateway could require new ifaddr, ifp;
|
|
* flags may also be different; ifp may be specified
|
|
* by ll sockaddr when protocol address is ambiguous
|
|
*/
|
|
if (((rt->rt_flags & RTF_GATEWAY) &&
|
|
info.rti_info[RTAX_GATEWAY] != NULL) ||
|
|
info.rti_info[RTAX_IFP] != NULL ||
|
|
(info.rti_info[RTAX_IFA] != NULL &&
|
|
!sa_equal(info.rti_info[RTAX_IFA],
|
|
rt->rt_ifa->ifa_addr))) {
|
|
RT_UNLOCK(rt);
|
|
RADIX_NODE_HEAD_LOCK(rnh);
|
|
error = rt_getifa_fib(&info, rt->rt_fibnum);
|
|
/*
|
|
* XXXRW: Really we should release this
|
|
* reference later, but this maintains
|
|
* historical behavior.
|
|
*/
|
|
if (info.rti_ifa != NULL)
|
|
ifa_free(info.rti_ifa);
|
|
RADIX_NODE_HEAD_UNLOCK(rnh);
|
|
if (error != 0)
|
|
senderr(error);
|
|
RT_LOCK(rt);
|
|
}
|
|
if (info.rti_ifa != NULL &&
|
|
info.rti_ifa != rt->rt_ifa &&
|
|
rt->rt_ifa != NULL &&
|
|
rt->rt_ifa->ifa_rtrequest != NULL) {
|
|
rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt,
|
|
&info);
|
|
ifa_free(rt->rt_ifa);
|
|
}
|
|
if (info.rti_info[RTAX_GATEWAY] != NULL) {
|
|
RT_UNLOCK(rt);
|
|
RADIX_NODE_HEAD_LOCK(rnh);
|
|
RT_LOCK(rt);
|
|
|
|
error = rt_setgate(rt, rt_key(rt),
|
|
info.rti_info[RTAX_GATEWAY]);
|
|
RADIX_NODE_HEAD_UNLOCK(rnh);
|
|
if (error != 0) {
|
|
RT_UNLOCK(rt);
|
|
senderr(error);
|
|
}
|
|
rt->rt_flags |= (RTF_GATEWAY & info.rti_flags);
|
|
}
|
|
if (info.rti_ifa != NULL &&
|
|
info.rti_ifa != rt->rt_ifa) {
|
|
ifa_ref(info.rti_ifa);
|
|
rt->rt_ifa = info.rti_ifa;
|
|
rt->rt_ifp = info.rti_ifp;
|
|
}
|
|
/* Allow some flags to be toggled on change. */
|
|
rt->rt_flags = (rt->rt_flags & ~RTF_FMASK) |
|
|
(rtm->rtm_flags & RTF_FMASK);
|
|
rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
|
|
&rt->rt_rmx);
|
|
rtm->rtm_index = rt->rt_ifp->if_index;
|
|
if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
|
|
rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
|
|
/* FALLTHROUGH */
|
|
case RTM_LOCK:
|
|
/* We don't support locks anymore */
|
|
break;
|
|
}
|
|
RT_UNLOCK(rt);
|
|
break;
|
|
|
|
default:
|
|
senderr(EOPNOTSUPP);
|
|
}
|
|
|
|
flush:
|
|
if (rtm) {
|
|
if (error)
|
|
rtm->rtm_errno = error;
|
|
else
|
|
rtm->rtm_flags |= RTF_DONE;
|
|
}
|
|
if (rt) /* XXX can this be true? */
|
|
RTFREE(rt);
|
|
{
|
|
struct rawcb *rp = NULL;
|
|
/*
|
|
* Check to see if we don't want our own messages.
|
|
*/
|
|
if ((so->so_options & SO_USELOOPBACK) == 0) {
|
|
if (route_cb.any_count <= 1) {
|
|
if (rtm)
|
|
Free(rtm);
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
/* There is another listener, so construct message */
|
|
rp = sotorawcb(so);
|
|
}
|
|
if (rtm) {
|
|
m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
|
|
if (m->m_pkthdr.len < rtm->rtm_msglen) {
|
|
m_freem(m);
|
|
m = NULL;
|
|
} else if (m->m_pkthdr.len > rtm->rtm_msglen)
|
|
m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
|
|
Free(rtm);
|
|
}
|
|
if (m) {
|
|
if (rp) {
|
|
/*
|
|
* XXX insure we don't get a copy by
|
|
* invalidating our protocol
|
|
*/
|
|
unsigned short family = rp->rcb_proto.sp_family;
|
|
rp->rcb_proto.sp_family = 0;
|
|
rt_dispatch(m, info.rti_info[RTAX_DST]);
|
|
rp->rcb_proto.sp_family = family;
|
|
} else
|
|
rt_dispatch(m, info.rti_info[RTAX_DST]);
|
|
}
|
|
}
|
|
return (error);
|
|
#undef sa_equal
|
|
}
|
|
|
|
static void
|
|
rt_setmetrics(u_long which, const struct rt_metrics *in,
|
|
struct rt_metrics_lite *out)
|
|
{
|
|
#define metric(f, e) if (which & (f)) out->e = in->e;
|
|
/*
|
|
* Only these are stored in the routing entry since introduction
|
|
* of tcp hostcache. The rest is ignored.
|
|
*/
|
|
metric(RTV_MTU, rmx_mtu);
|
|
metric(RTV_WEIGHT, rmx_weight);
|
|
/* Userland -> kernel timebase conversion. */
|
|
if (which & RTV_EXPIRE)
|
|
out->rmx_expire = in->rmx_expire ?
|
|
in->rmx_expire - time_second + time_uptime : 0;
|
|
#undef metric
|
|
}
|
|
|
|
static void
|
|
rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out)
|
|
{
|
|
#define metric(e) out->e = in->e;
|
|
bzero(out, sizeof(*out));
|
|
metric(rmx_mtu);
|
|
metric(rmx_weight);
|
|
/* Kernel -> userland timebase conversion. */
|
|
out->rmx_expire = in->rmx_expire ?
|
|
in->rmx_expire - time_uptime + time_second : 0;
|
|
#undef metric
|
|
}
|
|
|
|
/*
|
|
* 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(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
|
|
{
|
|
struct sockaddr *sa;
|
|
int i;
|
|
|
|
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;
|
|
cp += SA_SIZE(sa);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct mbuf *
|
|
rt_msg1(int type, struct rt_addrinfo *rtinfo)
|
|
{
|
|
struct rt_msghdr *rtm;
|
|
struct mbuf *m;
|
|
int i;
|
|
struct sockaddr *sa;
|
|
int len, dlen;
|
|
|
|
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;
|
|
|
|
case RTM_IFANNOUNCE:
|
|
case RTM_IEEE80211:
|
|
len = sizeof(struct if_announcemsghdr);
|
|
break;
|
|
|
|
default:
|
|
len = sizeof(struct rt_msghdr);
|
|
}
|
|
if (len > MCLBYTES)
|
|
panic("rt_msg1");
|
|
m = m_gethdr(M_DONTWAIT, MT_DATA);
|
|
if (m && len > MHLEN) {
|
|
MCLGET(m, M_DONTWAIT);
|
|
if ((m->m_flags & M_EXT) == 0) {
|
|
m_free(m);
|
|
m = NULL;
|
|
}
|
|
}
|
|
if (m == NULL)
|
|
return (m);
|
|
m->m_pkthdr.len = m->m_len = len;
|
|
m->m_pkthdr.rcvif = NULL;
|
|
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 = SA_SIZE(sa);
|
|
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(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w)
|
|
{
|
|
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:
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (w != NULL && w->w_req->flags & SCTL_MASK32) {
|
|
len = sizeof(struct if_msghdr32);
|
|
break;
|
|
}
|
|
#endif
|
|
len = sizeof(struct if_msghdr);
|
|
break;
|
|
|
|
case RTM_NEWMADDR:
|
|
len = sizeof(struct ifma_msghdr);
|
|
break;
|
|
|
|
default:
|
|
len = sizeof(struct rt_msghdr);
|
|
}
|
|
cp0 = cp;
|
|
if (cp0)
|
|
cp += len;
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
struct sockaddr *sa;
|
|
|
|
if ((sa = rtinfo->rti_info[i]) == NULL)
|
|
continue;
|
|
rtinfo->rti_addrs |= (1 << i);
|
|
dlen = SA_SIZE(sa);
|
|
if (cp) {
|
|
bcopy((caddr_t)sa, cp, (unsigned)dlen);
|
|
cp += dlen;
|
|
}
|
|
len += dlen;
|
|
}
|
|
len = ALIGN(len);
|
|
if (cp == NULL && w != NULL && !second_time) {
|
|
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) {
|
|
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(int type, struct rt_addrinfo *rtinfo, int flags, int error)
|
|
{
|
|
struct rt_msghdr *rtm;
|
|
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 == NULL)
|
|
return;
|
|
rtm = mtod(m, struct rt_msghdr *);
|
|
rtm->rtm_flags = RTF_DONE | flags;
|
|
rtm->rtm_errno = error;
|
|
rtm->rtm_addrs = rtinfo->rti_addrs;
|
|
rt_dispatch(m, sa);
|
|
}
|
|
|
|
/*
|
|
* 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(struct ifnet *ifp)
|
|
{
|
|
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 == NULL)
|
|
return;
|
|
ifm = mtod(m, struct if_msghdr *);
|
|
ifm->ifm_index = ifp->if_index;
|
|
ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifm->ifm_data = ifp->if_data;
|
|
ifm->ifm_addrs = 0;
|
|
rt_dispatch(m, NULL);
|
|
}
|
|
|
|
/*
|
|
* 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(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
|
|
{
|
|
struct rt_addrinfo info;
|
|
struct sockaddr *sa = NULL;
|
|
int pass;
|
|
struct mbuf *m = NULL;
|
|
struct ifnet *ifp = ifa->ifa_ifp;
|
|
|
|
KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
|
|
("unexpected cmd %u", cmd));
|
|
#if defined(INET) || defined(INET6)
|
|
#ifdef SCTP
|
|
/*
|
|
* notify the SCTP stack
|
|
* this will only get called when an address is added/deleted
|
|
* XXX pass the ifaddr struct instead if ifa->ifa_addr...
|
|
*/
|
|
sctp_addr_change(ifa, cmd);
|
|
#endif /* SCTP */
|
|
#endif
|
|
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)) {
|
|
struct ifa_msghdr *ifam;
|
|
int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
|
|
|
|
info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
|
|
info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
|
|
info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
|
|
info.rti_info[RTAX_BRD] = 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)) {
|
|
struct rt_msghdr *rtm;
|
|
|
|
if (rt == NULL)
|
|
continue;
|
|
info.rti_info[RTAX_NETMASK] = rt_mask(rt);
|
|
info.rti_info[RTAX_DST] = sa = rt_key(rt);
|
|
info.rti_info[RTAX_GATEWAY] = 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;
|
|
}
|
|
rt_dispatch(m, sa);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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(int cmd, struct ifmultiaddr *ifma)
|
|
{
|
|
struct rt_addrinfo info;
|
|
struct mbuf *m = NULL;
|
|
struct ifnet *ifp = ifma->ifma_ifp;
|
|
struct ifma_msghdr *ifmam;
|
|
|
|
if (route_cb.any_count == 0)
|
|
return;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_IFA] = ifma->ifma_addr;
|
|
info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL;
|
|
/*
|
|
* If a link-layer address is present, present it as a ``gateway''
|
|
* (similarly to how ARP entries, e.g., are presented).
|
|
*/
|
|
info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
|
|
m = rt_msg1(cmd, &info);
|
|
if (m == NULL)
|
|
return;
|
|
ifmam = mtod(m, struct ifma_msghdr *);
|
|
KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n",
|
|
__func__));
|
|
ifmam->ifmam_index = ifp->if_index;
|
|
ifmam->ifmam_addrs = info.rti_addrs;
|
|
rt_dispatch(m, ifma->ifma_addr);
|
|
}
|
|
|
|
static struct mbuf *
|
|
rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
|
|
struct rt_addrinfo *info)
|
|
{
|
|
struct if_announcemsghdr *ifan;
|
|
struct mbuf *m;
|
|
|
|
if (route_cb.any_count == 0)
|
|
return NULL;
|
|
bzero((caddr_t)info, sizeof(*info));
|
|
m = rt_msg1(type, info);
|
|
if (m != NULL) {
|
|
ifan = mtod(m, struct if_announcemsghdr *);
|
|
ifan->ifan_index = ifp->if_index;
|
|
strlcpy(ifan->ifan_name, ifp->if_xname,
|
|
sizeof(ifan->ifan_name));
|
|
ifan->ifan_what = what;
|
|
}
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* This is called to generate routing socket messages indicating
|
|
* IEEE80211 wireless events.
|
|
* XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
|
|
*/
|
|
void
|
|
rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
|
|
{
|
|
struct mbuf *m;
|
|
struct rt_addrinfo info;
|
|
|
|
m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
|
|
if (m != NULL) {
|
|
/*
|
|
* Append the ieee80211 data. Try to stick it in the
|
|
* mbuf containing the ifannounce msg; otherwise allocate
|
|
* a new mbuf and append.
|
|
*
|
|
* NB: we assume m is a single mbuf.
|
|
*/
|
|
if (data_len > M_TRAILINGSPACE(m)) {
|
|
struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
|
|
if (n == NULL) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
bcopy(data, mtod(n, void *), data_len);
|
|
n->m_len = data_len;
|
|
m->m_next = n;
|
|
} else if (data_len > 0) {
|
|
bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
|
|
m->m_len += data_len;
|
|
}
|
|
if (m->m_flags & M_PKTHDR)
|
|
m->m_pkthdr.len += data_len;
|
|
mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
|
|
rt_dispatch(m, NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is called to generate routing socket messages indicating
|
|
* network interface arrival and departure.
|
|
*/
|
|
void
|
|
rt_ifannouncemsg(struct ifnet *ifp, int what)
|
|
{
|
|
struct mbuf *m;
|
|
struct rt_addrinfo info;
|
|
|
|
m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
|
|
if (m != NULL)
|
|
rt_dispatch(m, NULL);
|
|
}
|
|
|
|
static void
|
|
rt_dispatch(struct mbuf *m, const struct sockaddr *sa)
|
|
{
|
|
struct m_tag *tag;
|
|
|
|
/*
|
|
* Preserve the family from the sockaddr, if any, in an m_tag for
|
|
* use when injecting the mbuf into the routing socket buffer from
|
|
* the netisr.
|
|
*/
|
|
if (sa != NULL) {
|
|
tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
|
|
M_NOWAIT);
|
|
if (tag == NULL) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
*(unsigned short *)(tag + 1) = sa->sa_family;
|
|
m_tag_prepend(m, tag);
|
|
}
|
|
#ifdef VIMAGE
|
|
if (V_loif)
|
|
m->m_pkthdr.rcvif = V_loif;
|
|
else {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
#endif
|
|
netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */
|
|
}
|
|
|
|
/*
|
|
* This is used in dumping the kernel table via sysctl().
|
|
*/
|
|
static int
|
|
sysctl_dumpentry(struct radix_node *rn, void *vw)
|
|
{
|
|
struct walkarg *w = vw;
|
|
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;
|
|
if ((rt->rt_flags & RTF_HOST) == 0
|
|
? jailed_without_vnet(w->w_req->td->td_ucred)
|
|
: prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0)
|
|
return (0);
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] = rt_key(rt);
|
|
info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
|
|
info.rti_info[RTAX_NETMASK] = rt_mask(rt);
|
|
info.rti_info[RTAX_GENMASK] = 0;
|
|
if (rt->rt_ifp) {
|
|
info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr;
|
|
info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
|
|
if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
|
|
info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr;
|
|
}
|
|
size = rt_msg2(RTM_GET, &info, NULL, w);
|
|
if (w->w_req && w->w_tmem) {
|
|
struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
|
|
|
|
rtm->rtm_flags = rt->rt_flags;
|
|
/*
|
|
* let's be honest about this being a retarded hack
|
|
*/
|
|
rtm->rtm_fmask = rt->rt_rmx.rmx_pksent;
|
|
rt_getmetrics(&rt->rt_rmx, &rtm->rtm_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);
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
static void
|
|
copy_ifdata32(struct if_data *src, struct if_data32 *dst)
|
|
{
|
|
|
|
bzero(dst, sizeof(*dst));
|
|
CP(*src, *dst, ifi_type);
|
|
CP(*src, *dst, ifi_physical);
|
|
CP(*src, *dst, ifi_addrlen);
|
|
CP(*src, *dst, ifi_hdrlen);
|
|
CP(*src, *dst, ifi_link_state);
|
|
dst->ifi_datalen = sizeof(struct if_data32);
|
|
CP(*src, *dst, ifi_mtu);
|
|
CP(*src, *dst, ifi_metric);
|
|
CP(*src, *dst, ifi_baudrate);
|
|
CP(*src, *dst, ifi_ipackets);
|
|
CP(*src, *dst, ifi_ierrors);
|
|
CP(*src, *dst, ifi_opackets);
|
|
CP(*src, *dst, ifi_oerrors);
|
|
CP(*src, *dst, ifi_collisions);
|
|
CP(*src, *dst, ifi_ibytes);
|
|
CP(*src, *dst, ifi_obytes);
|
|
CP(*src, *dst, ifi_imcasts);
|
|
CP(*src, *dst, ifi_omcasts);
|
|
CP(*src, *dst, ifi_iqdrops);
|
|
CP(*src, *dst, ifi_noproto);
|
|
CP(*src, *dst, ifi_hwassist);
|
|
CP(*src, *dst, ifi_epoch);
|
|
TV_CP(*src, *dst, ifi_lastchange);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
sysctl_iflist(int af, struct walkarg *w)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
struct rt_addrinfo info;
|
|
int len, error = 0;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
if (w->w_arg && w->w_arg != ifp->if_index)
|
|
continue;
|
|
ifa = ifp->if_addr;
|
|
info.rti_info[RTAX_IFP] = ifa->ifa_addr;
|
|
len = rt_msg2(RTM_IFINFO, &info, NULL, w);
|
|
info.rti_info[RTAX_IFP] = NULL;
|
|
if (w->w_req && w->w_tmem) {
|
|
struct if_msghdr *ifm;
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (w->w_req->flags & SCTL_MASK32) {
|
|
struct if_msghdr32 *ifm32;
|
|
|
|
ifm32 = (struct if_msghdr32 *)w->w_tmem;
|
|
ifm32->ifm_index = ifp->if_index;
|
|
ifm32->ifm_flags = ifp->if_flags |
|
|
ifp->if_drv_flags;
|
|
copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
|
|
ifm32->ifm_addrs = info.rti_addrs;
|
|
error = SYSCTL_OUT(w->w_req, (caddr_t)ifm32,
|
|
len);
|
|
goto sysctl_out;
|
|
}
|
|
#endif
|
|
ifm = (struct if_msghdr *)w->w_tmem;
|
|
ifm->ifm_index = ifp->if_index;
|
|
ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifm->ifm_data = ifp->if_data;
|
|
ifm->ifm_addrs = info.rti_addrs;
|
|
error = SYSCTL_OUT(w->w_req, (caddr_t)ifm, len);
|
|
#ifdef COMPAT_FREEBSD32
|
|
sysctl_out:
|
|
#endif
|
|
if (error)
|
|
goto done;
|
|
}
|
|
while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
|
|
if (af && af != ifa->ifa_addr->sa_family)
|
|
continue;
|
|
if (prison_if(w->w_req->td->td_ucred,
|
|
ifa->ifa_addr) != 0)
|
|
continue;
|
|
info.rti_info[RTAX_IFA] = ifa->ifa_addr;
|
|
info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
|
|
info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
|
|
len = rt_msg2(RTM_NEWADDR, &info, NULL, w);
|
|
if (w->w_req && w->w_tmem) {
|
|
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)
|
|
goto done;
|
|
}
|
|
}
|
|
info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] =
|
|
info.rti_info[RTAX_BRD] = NULL;
|
|
}
|
|
done:
|
|
IFNET_RUNLOCK();
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sysctl_ifmalist(int af, struct walkarg *w)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifmultiaddr *ifma;
|
|
struct rt_addrinfo info;
|
|
int len, error = 0;
|
|
struct ifaddr *ifa;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
IFNET_RLOCK();
|
|
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
if (w->w_arg && w->w_arg != ifp->if_index)
|
|
continue;
|
|
ifa = ifp->if_addr;
|
|
info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL;
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
|
|
if (af && af != ifma->ifma_addr->sa_family)
|
|
continue;
|
|
if (prison_if(w->w_req->td->td_ucred,
|
|
ifma->ifma_addr) != 0)
|
|
continue;
|
|
info.rti_info[RTAX_IFA] = ifma->ifma_addr;
|
|
info.rti_info[RTAX_GATEWAY] =
|
|
(ifma->ifma_addr->sa_family != AF_LINK) ?
|
|
ifma->ifma_lladdr : NULL;
|
|
len = rt_msg2(RTM_NEWMADDR, &info, NULL, w);
|
|
if (w->w_req && w->w_tmem) {
|
|
struct ifma_msghdr *ifmam;
|
|
|
|
ifmam = (struct ifma_msghdr *)w->w_tmem;
|
|
ifmam->ifmam_index = ifma->ifma_ifp->if_index;
|
|
ifmam->ifmam_flags = 0;
|
|
ifmam->ifmam_addrs = info.rti_addrs;
|
|
error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
|
|
if (error) {
|
|
IF_ADDR_UNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
}
|
|
done:
|
|
IFNET_RUNLOCK();
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sysctl_rtsock(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int *name = (int *)arg1;
|
|
u_int namelen = arg2;
|
|
struct radix_node_head *rnh = NULL; /* silence compiler. */
|
|
int i, lim, error = EINVAL;
|
|
u_char af;
|
|
struct walkarg w;
|
|
|
|
name ++;
|
|
namelen--;
|
|
if (req->newptr)
|
|
return (EPERM);
|
|
if (namelen != 3)
|
|
return ((namelen < 3) ? EISDIR : ENOTDIR);
|
|
af = name[0];
|
|
if (af > AF_MAX)
|
|
return (EINVAL);
|
|
bzero(&w, sizeof(w));
|
|
w.w_op = name[1];
|
|
w.w_arg = name[2];
|
|
w.w_req = req;
|
|
|
|
error = sysctl_wire_old_buffer(req, 0);
|
|
if (error)
|
|
return (error);
|
|
switch (w.w_op) {
|
|
|
|
case NET_RT_DUMP:
|
|
case NET_RT_FLAGS:
|
|
if (af == 0) { /* dump all tables */
|
|
i = 1;
|
|
lim = AF_MAX;
|
|
} else /* dump only one table */
|
|
i = lim = af;
|
|
|
|
/*
|
|
* take care of llinfo entries, the caller must
|
|
* specify an AF
|
|
*/
|
|
if (w.w_op == NET_RT_FLAGS &&
|
|
(w.w_arg == 0 || w.w_arg & RTF_LLINFO)) {
|
|
if (af != 0)
|
|
error = lltable_sysctl_dumparp(af, w.w_req);
|
|
else
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
/*
|
|
* take care of routing entries
|
|
*/
|
|
for (error = 0; error == 0 && i <= lim; i++) {
|
|
rnh = rt_tables_get_rnh(req->td->td_proc->p_fibnum, i);
|
|
if (rnh != NULL) {
|
|
RADIX_NODE_HEAD_LOCK(rnh);
|
|
error = rnh->rnh_walktree(rnh,
|
|
sysctl_dumpentry, &w);
|
|
RADIX_NODE_HEAD_UNLOCK(rnh);
|
|
} else if (af != 0)
|
|
error = EAFNOSUPPORT;
|
|
}
|
|
break;
|
|
|
|
case NET_RT_IFLIST:
|
|
error = sysctl_iflist(af, &w);
|
|
break;
|
|
|
|
case NET_RT_IFMALIST:
|
|
error = sysctl_ifmalist(af, &w);
|
|
break;
|
|
}
|
|
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.
|
|
*/
|
|
|
|
static struct domain routedomain; /* or at least forward */
|
|
|
|
static struct protosw routesw[] = {
|
|
{
|
|
.pr_type = SOCK_RAW,
|
|
.pr_domain = &routedomain,
|
|
.pr_flags = PR_ATOMIC|PR_ADDR,
|
|
.pr_output = route_output,
|
|
.pr_ctlinput = raw_ctlinput,
|
|
.pr_init = raw_init,
|
|
.pr_usrreqs = &route_usrreqs
|
|
}
|
|
};
|
|
|
|
static struct domain routedomain = {
|
|
.dom_family = PF_ROUTE,
|
|
.dom_name = "route",
|
|
.dom_protosw = routesw,
|
|
.dom_protoswNPROTOSW = &routesw[sizeof(routesw)/sizeof(routesw[0])]
|
|
};
|
|
|
|
VNET_DOMAIN_SET(route);
|