0dcef81de9
Reported by: KMSAN MFC after: 1 week Sponsored by: The FreeBSD Foundation
2711 lines
66 KiB
C
2711 lines
66 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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. 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_ddb.h"
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#include "opt_route.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/rmlock.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_var.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/route/route_ctl.h>
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#include <net/route/route_var.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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#include <netinet/ip_carp.h>
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#ifdef INET6
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#include <netinet6/in6_var.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/scope6_var.h>
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#endif
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#include <net/route/nhop.h>
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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_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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uint16_t _ifm_spare1;
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struct if_data ifm_data;
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};
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struct if_msghdrl32 {
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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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uint16_t _ifm_spare1;
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uint16_t ifm_len;
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uint16_t ifm_data_off;
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uint32_t _ifm_spare2;
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struct if_data ifm_data;
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};
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struct ifa_msghdrl32 {
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uint16_t ifam_msglen;
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uint8_t ifam_version;
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uint8_t ifam_type;
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int32_t ifam_addrs;
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int32_t ifam_flags;
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uint16_t ifam_index;
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uint16_t _ifam_spare1;
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uint16_t ifam_len;
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uint16_t ifam_data_off;
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int32_t ifam_metric;
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struct if_data ifam_data;
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};
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#define SA_SIZE32(sa) \
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( (((struct sockaddr *)(sa))->sa_len == 0) ? \
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sizeof(int) : \
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1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(int) - 1) ) )
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#endif /* COMPAT_FREEBSD32 */
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struct linear_buffer {
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char *base; /* Base allocated memory pointer */
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uint32_t offset; /* Currently used offset */
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uint32_t size; /* Total buffer size */
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};
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#define SCRATCH_BUFFER_SIZE 1024
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#define RTS_PID_PRINTF(_fmt, ...) \
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printf("rtsock:%s(): PID %d: " _fmt "\n", __func__, curproc->p_pid, ## __VA_ARGS__)
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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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/* These are external hooks for CARP. */
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int (*carp_get_vhid_p)(struct ifaddr *);
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/*
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* Used by rtsock/raw_input callback code to decide whether to filter the update
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* notification to a socket bound to a particular FIB.
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*/
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#define RTS_FILTER_FIB M_PROTO8
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typedef 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 any_count; /* total attached */
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} route_cb_t;
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VNET_DEFINE_STATIC(route_cb_t, route_cb);
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#define V_route_cb VNET(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 | CTLFLAG_MPSAFE, 0, "");
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struct walkarg {
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int family;
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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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struct sockaddr *dst;
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struct sockaddr *mask;
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};
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static void rts_input(struct mbuf *m);
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static struct mbuf *rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo);
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static int rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo,
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struct walkarg *w, int *plen);
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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 cleanup_xaddrs(struct rt_addrinfo *info, struct linear_buffer *lb);
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static int sysctl_dumpentry(struct rtentry *rt, void *vw);
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static int sysctl_dumpnhop(struct rtentry *rt, struct nhop_object *nh,
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uint32_t weight, struct walkarg *w);
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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_getmetrics(const struct rtentry *rt,
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const struct nhop_object *nh, struct rt_metrics *out);
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static void rt_dispatch(struct mbuf *, sa_family_t);
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static int handle_rtm_get(struct rt_addrinfo *info, u_int fibnum,
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struct rt_msghdr *rtm, struct rib_cmd_info *rc);
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static int update_rtm_from_rc(struct rt_addrinfo *info,
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struct rt_msghdr **prtm, int alloc_len,
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struct rib_cmd_info *rc, struct nhop_object *nh);
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static void send_rtm_reply(struct socket *so, struct rt_msghdr *rtm,
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struct mbuf *m, sa_family_t saf, u_int fibnum,
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int rtm_errno);
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static bool can_export_rte(struct ucred *td_ucred, bool rt_is_host,
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const struct sockaddr *rt_dst);
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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,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
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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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vnet_rts_init(void)
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{
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int tmp;
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if (IS_DEFAULT_VNET(curvnet)) {
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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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#ifdef VIMAGE
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else
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netisr_register_vnet(&rtsock_nh);
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#endif
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}
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VNET_SYSINIT(vnet_rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD,
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vnet_rts_init, 0);
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#ifdef VIMAGE
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static void
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vnet_rts_uninit(void)
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{
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netisr_unregister_vnet(&rtsock_nh);
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}
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VNET_SYSUNINIT(vnet_rts_uninit, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD,
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vnet_rts_uninit, 0);
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#endif
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static int
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raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src,
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struct rawcb *rp)
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{
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int fibnum;
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KASSERT(m != NULL, ("%s: m is NULL", __func__));
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KASSERT(proto != NULL, ("%s: proto is NULL", __func__));
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KASSERT(rp != NULL, ("%s: rp is NULL", __func__));
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/* No filtering requested. */
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if ((m->m_flags & RTS_FILTER_FIB) == 0)
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return (0);
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/* Check if it is a rts and the fib matches the one of the socket. */
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fibnum = M_GETFIB(m);
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if (proto->sp_family != PF_ROUTE ||
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rp->rcb_socket == NULL ||
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rp->rcb_socket->so_fibnum == fibnum)
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return (0);
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/* Filtering requested and no match, the socket shall be skipped. */
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return (1);
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}
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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_ext(m, &route_proto, &route_src, raw_input_rts_cb);
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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 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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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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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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V_route_cb.ip_count++;
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break;
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case AF_INET6:
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V_route_cb.ip6_count++;
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break;
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}
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V_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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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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V_route_cb.ip_count--;
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break;
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case AF_INET6:
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V_route_cb.ip6_count--;
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break;
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}
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V_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 nhop_object *nh, union sockaddr_union *saun, struct ucred *cred)
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{
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#if defined(INET) || defined(INET6)
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struct epoch_tracker et;
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#endif
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/* First, see if the returned address is part of the jail. */
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if (prison_if(cred, nh->nh_ifa->ifa_addr) == 0) {
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info->rti_info[RTAX_IFA] = nh->nh_ifa->ifa_addr;
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return (0);
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}
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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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|
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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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*/
|
|
NET_EPOCH_ENTER(et);
|
|
CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
struct sockaddr *sa;
|
|
sa = ifa->ifa_addr;
|
|
if (sa->sa_family != AF_INET)
|
|
continue;
|
|
ia = ((struct sockaddr_in *)sa)->sin_addr;
|
|
if (prison_check_ip4(cred, &ia) == 0) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
NET_EPOCH_EXIT(et);
|
|
if (!found) {
|
|
/*
|
|
* As a last resort return the 'default' jail address.
|
|
*/
|
|
ia = ((struct sockaddr_in *)nh->nh_ifa->ifa_addr)->
|
|
sin_addr;
|
|
if (prison_get_ip4(cred, &ia) != 0)
|
|
return (ESRCH);
|
|
}
|
|
bzero(&saun->sin, sizeof(struct sockaddr_in));
|
|
saun->sin.sin_len = sizeof(struct sockaddr_in);
|
|
saun->sin.sin_family = AF_INET;
|
|
saun->sin.sin_addr.s_addr = ia.s_addr;
|
|
info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
{
|
|
struct in6_addr ia6;
|
|
struct ifaddr *ifa;
|
|
int found;
|
|
|
|
found = 0;
|
|
/*
|
|
* Try to find an address on the given outgoing interface
|
|
* that belongs to the jail.
|
|
*/
|
|
NET_EPOCH_ENTER(et);
|
|
CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
struct sockaddr *sa;
|
|
sa = ifa->ifa_addr;
|
|
if (sa->sa_family != AF_INET6)
|
|
continue;
|
|
bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
|
|
&ia6, sizeof(struct in6_addr));
|
|
if (prison_check_ip6(cred, &ia6) == 0) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
NET_EPOCH_EXIT(et);
|
|
if (!found) {
|
|
/*
|
|
* As a last resort return the 'default' jail address.
|
|
*/
|
|
ia6 = ((struct sockaddr_in6 *)nh->nh_ifa->ifa_addr)->
|
|
sin6_addr;
|
|
if (prison_get_ip6(cred, &ia6) != 0)
|
|
return (ESRCH);
|
|
}
|
|
bzero(&saun->sin6, sizeof(struct sockaddr_in6));
|
|
saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
saun->sin6.sin6_family = AF_INET6;
|
|
bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
|
|
if (sa6_recoverscope(&saun->sin6) != 0)
|
|
return (ESRCH);
|
|
info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
return (ESRCH);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
fill_blackholeinfo(struct rt_addrinfo *info, union sockaddr_union *saun)
|
|
{
|
|
struct ifaddr *ifa;
|
|
sa_family_t saf;
|
|
|
|
if (V_loif == NULL) {
|
|
RTS_PID_PRINTF("Unable to add blackhole/reject nhop without loopback");
|
|
return (ENOTSUP);
|
|
}
|
|
info->rti_ifp = V_loif;
|
|
|
|
saf = info->rti_info[RTAX_DST]->sa_family;
|
|
|
|
CK_STAILQ_FOREACH(ifa, &info->rti_ifp->if_addrhead, ifa_link) {
|
|
if (ifa->ifa_addr->sa_family == saf) {
|
|
info->rti_ifa = ifa;
|
|
break;
|
|
}
|
|
}
|
|
if (info->rti_ifa == NULL)
|
|
return (ENOTSUP);
|
|
|
|
bzero(saun, sizeof(union sockaddr_union));
|
|
switch (saf) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
saun->sin.sin_family = AF_INET;
|
|
saun->sin.sin_len = sizeof(struct sockaddr_in);
|
|
saun->sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
saun->sin6.sin6_family = AF_INET6;
|
|
saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
saun->sin6.sin6_addr = in6addr_loopback;
|
|
break;
|
|
#endif
|
|
default:
|
|
return (ENOTSUP);
|
|
}
|
|
info->rti_info[RTAX_GATEWAY] = &saun->sa;
|
|
info->rti_flags |= RTF_GATEWAY;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Fills in @info based on userland-provided @rtm message.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
fill_addrinfo(struct rt_msghdr *rtm, int len, struct linear_buffer *lb, u_int fibnum,
|
|
struct rt_addrinfo *info)
|
|
{
|
|
int error;
|
|
sa_family_t saf;
|
|
|
|
rtm->rtm_pid = curproc->p_pid;
|
|
info->rti_addrs = rtm->rtm_addrs;
|
|
|
|
info->rti_mflags = rtm->rtm_inits;
|
|
info->rti_rmx = &rtm->rtm_rmx;
|
|
|
|
/*
|
|
* rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6
|
|
* link-local address because rtrequest requires addresses with
|
|
* embedded scope id.
|
|
*/
|
|
if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, info))
|
|
return (EINVAL);
|
|
|
|
info->rti_flags = rtm->rtm_flags;
|
|
error = cleanup_xaddrs(info, lb);
|
|
if (error != 0)
|
|
return (error);
|
|
saf = info->rti_info[RTAX_DST]->sa_family;
|
|
/*
|
|
* 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 != 0)
|
|
return (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 rt_addrinfo ginfo;
|
|
struct sockaddr *gdst;
|
|
struct sockaddr_storage ss;
|
|
|
|
bzero(&ginfo, sizeof(ginfo));
|
|
bzero(&ss, sizeof(ss));
|
|
ss.ss_len = sizeof(ss);
|
|
|
|
ginfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ss;
|
|
gdst = info->rti_info[RTAX_GATEWAY];
|
|
|
|
/*
|
|
* 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 gateway, and the
|
|
* rt_ifp has the IFF_LOOPBACK flag set.
|
|
*/
|
|
if (rib_lookup_info(fibnum, gdst, NHR_REF, 0, &ginfo) == 0) {
|
|
if (ss.ss_family == AF_LINK &&
|
|
ginfo.rti_ifp->if_flags & IFF_LOOPBACK) {
|
|
info->rti_flags &= ~RTF_GATEWAY;
|
|
info->rti_flags |= RTF_GWFLAG_COMPAT;
|
|
}
|
|
rib_free_info(&ginfo);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct nhop_object *
|
|
select_nhop(struct nhop_object *nh, const struct sockaddr *gw)
|
|
{
|
|
if (!NH_IS_NHGRP(nh))
|
|
return (nh);
|
|
#ifdef ROUTE_MPATH
|
|
struct weightened_nhop *wn;
|
|
uint32_t num_nhops;
|
|
wn = nhgrp_get_nhops((struct nhgrp_object *)nh, &num_nhops);
|
|
if (gw == NULL)
|
|
return (wn[0].nh);
|
|
for (int i = 0; i < num_nhops; i++) {
|
|
if (match_nhop_gw(wn[i].nh, gw))
|
|
return (wn[i].nh);
|
|
}
|
|
#endif
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Handles RTM_GET message from routing socket, returning matching rt.
|
|
*
|
|
* Returns:
|
|
* 0 on success, with locked and referenced matching rt in @rt_nrt
|
|
* errno of failure
|
|
*/
|
|
static int
|
|
handle_rtm_get(struct rt_addrinfo *info, u_int fibnum,
|
|
struct rt_msghdr *rtm, struct rib_cmd_info *rc)
|
|
{
|
|
RIB_RLOCK_TRACKER;
|
|
struct rib_head *rnh;
|
|
struct nhop_object *nh;
|
|
sa_family_t saf;
|
|
|
|
saf = info->rti_info[RTAX_DST]->sa_family;
|
|
|
|
rnh = rt_tables_get_rnh(fibnum, saf);
|
|
if (rnh == NULL)
|
|
return (EAFNOSUPPORT);
|
|
|
|
RIB_RLOCK(rnh);
|
|
|
|
/*
|
|
* By (implicit) convention host route (one without netmask)
|
|
* means longest-prefix-match request and the route with netmask
|
|
* means exact-match lookup.
|
|
* As cleanup_xaddrs() cleans up info flags&addrs for the /32,/128
|
|
* prefixes, use original data to check for the netmask presence.
|
|
*/
|
|
if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
|
|
/*
|
|
* Provide longest prefix match for
|
|
* address lookup (no mask).
|
|
* 'route -n get addr'
|
|
*/
|
|
rc->rc_rt = (struct rtentry *) rnh->rnh_matchaddr(
|
|
info->rti_info[RTAX_DST], &rnh->head);
|
|
} else
|
|
rc->rc_rt = (struct rtentry *) rnh->rnh_lookup(
|
|
info->rti_info[RTAX_DST],
|
|
info->rti_info[RTAX_NETMASK], &rnh->head);
|
|
|
|
if (rc->rc_rt == NULL) {
|
|
RIB_RUNLOCK(rnh);
|
|
return (ESRCH);
|
|
}
|
|
|
|
nh = select_nhop(rt_get_raw_nhop(rc->rc_rt), info->rti_info[RTAX_GATEWAY]);
|
|
if (nh == NULL) {
|
|
RIB_RUNLOCK(rnh);
|
|
return (ESRCH);
|
|
}
|
|
/*
|
|
* 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.
|
|
* TODO: move this logic to userland.
|
|
*/
|
|
if (rtm->rtm_flags & RTF_ANNOUNCE) {
|
|
struct sockaddr laddr;
|
|
|
|
if (nh->nh_ifp != NULL &&
|
|
nh->nh_ifp->if_type == IFT_PROPVIRTUAL) {
|
|
struct ifaddr *ifa;
|
|
|
|
ifa = ifa_ifwithnet(info->rti_info[RTAX_DST], 1,
|
|
RT_ALL_FIBS);
|
|
if (ifa != NULL)
|
|
rt_maskedcopy(ifa->ifa_addr,
|
|
&laddr,
|
|
ifa->ifa_netmask);
|
|
} else
|
|
rt_maskedcopy(nh->nh_ifa->ifa_addr,
|
|
&laddr,
|
|
nh->nh_ifa->ifa_netmask);
|
|
/*
|
|
* refactor rt and no lock operation necessary
|
|
*/
|
|
rc->rc_rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr,
|
|
&rnh->head);
|
|
if (rc->rc_rt == NULL) {
|
|
RIB_RUNLOCK(rnh);
|
|
return (ESRCH);
|
|
}
|
|
nh = select_nhop(rt_get_raw_nhop(rc->rc_rt), info->rti_info[RTAX_GATEWAY]);
|
|
if (nh == NULL) {
|
|
RIB_RUNLOCK(rnh);
|
|
return (ESRCH);
|
|
}
|
|
}
|
|
rc->rc_nh_new = nh;
|
|
rc->rc_nh_weight = rc->rc_rt->rt_weight;
|
|
RIB_RUNLOCK(rnh);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
init_sockaddrs_family(int family, struct sockaddr *dst, struct sockaddr *mask)
|
|
{
|
|
#ifdef INET
|
|
if (family == AF_INET) {
|
|
struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
|
|
struct sockaddr_in *mask4 = (struct sockaddr_in *)mask;
|
|
|
|
bzero(dst4, sizeof(struct sockaddr_in));
|
|
bzero(mask4, sizeof(struct sockaddr_in));
|
|
|
|
dst4->sin_family = AF_INET;
|
|
dst4->sin_len = sizeof(struct sockaddr_in);
|
|
mask4->sin_family = AF_INET;
|
|
mask4->sin_len = sizeof(struct sockaddr_in);
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (family == AF_INET6) {
|
|
struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
|
|
struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask;
|
|
|
|
bzero(dst6, sizeof(struct sockaddr_in6));
|
|
bzero(mask6, sizeof(struct sockaddr_in6));
|
|
|
|
dst6->sin6_family = AF_INET6;
|
|
dst6->sin6_len = sizeof(struct sockaddr_in6);
|
|
mask6->sin6_family = AF_INET6;
|
|
mask6->sin6_len = sizeof(struct sockaddr_in6);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
export_rtaddrs(const struct rtentry *rt, struct sockaddr *dst,
|
|
struct sockaddr *mask)
|
|
{
|
|
#ifdef INET
|
|
if (dst->sa_family == AF_INET) {
|
|
struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
|
|
struct sockaddr_in *mask4 = (struct sockaddr_in *)mask;
|
|
uint32_t scopeid = 0;
|
|
rt_get_inet_prefix_pmask(rt, &dst4->sin_addr, &mask4->sin_addr,
|
|
&scopeid);
|
|
return;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (dst->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
|
|
struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask;
|
|
uint32_t scopeid = 0;
|
|
rt_get_inet6_prefix_pmask(rt, &dst6->sin6_addr,
|
|
&mask6->sin6_addr, &scopeid);
|
|
dst6->sin6_scope_id = scopeid;
|
|
return;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
update_rtm_from_info(struct rt_addrinfo *info, struct rt_msghdr **prtm,
|
|
int alloc_len)
|
|
{
|
|
struct rt_msghdr *rtm, *orig_rtm = NULL;
|
|
struct walkarg w;
|
|
int len;
|
|
|
|
rtm = *prtm;
|
|
/* Check if we need to realloc storage */
|
|
rtsock_msg_buffer(rtm->rtm_type, info, NULL, &len);
|
|
if (len > alloc_len) {
|
|
struct rt_msghdr *tmp_rtm;
|
|
|
|
tmp_rtm = malloc(len, M_TEMP, M_NOWAIT);
|
|
if (tmp_rtm == NULL)
|
|
return (ENOBUFS);
|
|
bcopy(rtm, tmp_rtm, rtm->rtm_msglen);
|
|
orig_rtm = rtm;
|
|
rtm = tmp_rtm;
|
|
alloc_len = len;
|
|
|
|
/*
|
|
* Delay freeing original rtm as info contains
|
|
* data referencing it.
|
|
*/
|
|
}
|
|
|
|
w.w_tmem = (caddr_t)rtm;
|
|
w.w_tmemsize = alloc_len;
|
|
rtsock_msg_buffer(rtm->rtm_type, info, &w, &len);
|
|
rtm->rtm_addrs = info->rti_addrs;
|
|
|
|
if (orig_rtm != NULL)
|
|
free(orig_rtm, M_TEMP);
|
|
*prtm = rtm;
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Update sockaddrs, flags, etc in @prtm based on @rc data.
|
|
* rtm can be reallocated.
|
|
*
|
|
* Returns 0 on success, along with pointer to (potentially reallocated)
|
|
* rtm.
|
|
*
|
|
*/
|
|
static int
|
|
update_rtm_from_rc(struct rt_addrinfo *info, struct rt_msghdr **prtm,
|
|
int alloc_len, struct rib_cmd_info *rc, struct nhop_object *nh)
|
|
{
|
|
union sockaddr_union saun;
|
|
struct rt_msghdr *rtm;
|
|
struct ifnet *ifp;
|
|
int error;
|
|
|
|
rtm = *prtm;
|
|
union sockaddr_union sa_dst, sa_mask;
|
|
int family = info->rti_info[RTAX_DST]->sa_family;
|
|
init_sockaddrs_family(family, &sa_dst.sa, &sa_mask.sa);
|
|
export_rtaddrs(rc->rc_rt, &sa_dst.sa, &sa_mask.sa);
|
|
|
|
info->rti_info[RTAX_DST] = &sa_dst.sa;
|
|
info->rti_info[RTAX_NETMASK] = rt_is_host(rc->rc_rt) ? NULL : &sa_mask.sa;
|
|
info->rti_info[RTAX_GATEWAY] = &nh->gw_sa;
|
|
info->rti_info[RTAX_GENMASK] = 0;
|
|
ifp = nh->nh_ifp;
|
|
if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
|
|
if (ifp) {
|
|
info->rti_info[RTAX_IFP] =
|
|
ifp->if_addr->ifa_addr;
|
|
error = rtm_get_jailed(info, ifp, nh,
|
|
&saun, curthread->td_ucred);
|
|
if (error != 0)
|
|
return (error);
|
|
if (ifp->if_flags & IFF_POINTOPOINT)
|
|
info->rti_info[RTAX_BRD] =
|
|
nh->nh_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 != NULL)
|
|
rtm->rtm_index = ifp->if_index;
|
|
|
|
if ((error = update_rtm_from_info(info, prtm, alloc_len)) != 0)
|
|
return (error);
|
|
|
|
rtm = *prtm;
|
|
rtm->rtm_flags = rc->rc_rt->rte_flags | nhop_get_rtflags(nh);
|
|
if (rtm->rtm_flags & RTF_GWFLAG_COMPAT)
|
|
rtm->rtm_flags = RTF_GATEWAY |
|
|
(rtm->rtm_flags & ~RTF_GWFLAG_COMPAT);
|
|
rt_getmetrics(rc->rc_rt, nh, &rtm->rtm_rmx);
|
|
rtm->rtm_rmx.rmx_weight = rc->rc_nh_weight;
|
|
|
|
return (0);
|
|
}
|
|
|
|
#ifdef ROUTE_MPATH
|
|
static void
|
|
save_del_notification(struct rib_cmd_info *rc, void *_cbdata)
|
|
{
|
|
struct rib_cmd_info *rc_new = (struct rib_cmd_info *)_cbdata;
|
|
|
|
if (rc->rc_cmd == RTM_DELETE)
|
|
*rc_new = *rc;
|
|
}
|
|
|
|
static void
|
|
save_add_notification(struct rib_cmd_info *rc, void *_cbdata)
|
|
{
|
|
struct rib_cmd_info *rc_new = (struct rib_cmd_info *)_cbdata;
|
|
|
|
if (rc->rc_cmd == RTM_ADD)
|
|
*rc_new = *rc;
|
|
}
|
|
#endif
|
|
|
|
#if defined(INET6) || defined(INET)
|
|
static struct sockaddr *
|
|
alloc_sockaddr_aligned(struct linear_buffer *lb, int len)
|
|
{
|
|
len = roundup2(len, sizeof(uint64_t));
|
|
if (lb->offset + len > lb->size)
|
|
return (NULL);
|
|
struct sockaddr *sa = (struct sockaddr *)(lb->base + lb->offset);
|
|
lb->offset += len;
|
|
return (sa);
|
|
}
|
|
#endif
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
route_output(struct mbuf *m, struct socket *so, ...)
|
|
{
|
|
struct rt_msghdr *rtm = NULL;
|
|
struct rtentry *rt = NULL;
|
|
struct rt_addrinfo info;
|
|
struct epoch_tracker et;
|
|
#ifdef INET6
|
|
struct sockaddr_storage ss;
|
|
struct sockaddr_in6 *sin6;
|
|
int i, rti_need_deembed = 0;
|
|
#endif
|
|
int alloc_len = 0, len, error = 0, fibnum;
|
|
sa_family_t saf = AF_UNSPEC;
|
|
struct rib_cmd_info rc;
|
|
struct nhop_object *nh;
|
|
|
|
fibnum = so->so_fibnum;
|
|
#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");
|
|
NET_EPOCH_ENTER(et);
|
|
len = m->m_pkthdr.len;
|
|
if (len < sizeof(*rtm) ||
|
|
len != mtod(m, struct rt_msghdr *)->rtm_msglen)
|
|
senderr(EINVAL);
|
|
|
|
/*
|
|
* Most of current messages are in range 200-240 bytes,
|
|
* minimize possible re-allocation on reply using larger size
|
|
* buffer aligned on 1k boundaty.
|
|
*/
|
|
alloc_len = roundup2(len, 1024);
|
|
int total_len = alloc_len + SCRATCH_BUFFER_SIZE;
|
|
if ((rtm = malloc(total_len, M_TEMP, M_NOWAIT)) == NULL)
|
|
senderr(ENOBUFS);
|
|
|
|
m_copydata(m, 0, len, (caddr_t)rtm);
|
|
bzero(&info, sizeof(info));
|
|
nh = NULL;
|
|
struct linear_buffer lb = {
|
|
.base = (char *)rtm + alloc_len,
|
|
.size = SCRATCH_BUFFER_SIZE,
|
|
};
|
|
|
|
if (rtm->rtm_version != RTM_VERSION) {
|
|
/* Do not touch message since format is unknown */
|
|
free(rtm, M_TEMP);
|
|
rtm = NULL;
|
|
senderr(EPROTONOSUPPORT);
|
|
}
|
|
|
|
/*
|
|
* Starting from here, it is possible
|
|
* to alter original message and insert
|
|
* caller PID and error value.
|
|
*/
|
|
|
|
if ((error = fill_addrinfo(rtm, len, &lb, fibnum, &info)) != 0) {
|
|
senderr(error);
|
|
}
|
|
/* fill_addringo() embeds scope into IPv6 addresses */
|
|
#ifdef INET6
|
|
rti_need_deembed = 1;
|
|
#endif
|
|
|
|
saf = info.rti_info[RTAX_DST]->sa_family;
|
|
|
|
/* support for new ARP code */
|
|
if (rtm->rtm_flags & RTF_LLDATA) {
|
|
error = lla_rt_output(rtm, &info);
|
|
goto flush;
|
|
}
|
|
|
|
union sockaddr_union gw_saun;
|
|
int blackhole_flags = rtm->rtm_flags & (RTF_BLACKHOLE|RTF_REJECT);
|
|
if (blackhole_flags != 0) {
|
|
if (blackhole_flags != (RTF_BLACKHOLE | RTF_REJECT))
|
|
error = fill_blackholeinfo(&info, &gw_saun);
|
|
else
|
|
error = EINVAL;
|
|
if (error != 0)
|
|
senderr(error);
|
|
}
|
|
|
|
switch (rtm->rtm_type) {
|
|
case RTM_ADD:
|
|
case RTM_CHANGE:
|
|
if (rtm->rtm_type == RTM_ADD) {
|
|
if (info.rti_info[RTAX_GATEWAY] == NULL)
|
|
senderr(EINVAL);
|
|
}
|
|
error = rib_action(fibnum, rtm->rtm_type, &info, &rc);
|
|
if (error == 0) {
|
|
#ifdef ROUTE_MPATH
|
|
if (NH_IS_NHGRP(rc.rc_nh_new) ||
|
|
(rc.rc_nh_old && NH_IS_NHGRP(rc.rc_nh_old))) {
|
|
struct rib_cmd_info rc_simple = {};
|
|
rib_decompose_notification(&rc,
|
|
save_add_notification, (void *)&rc_simple);
|
|
rc = rc_simple;
|
|
}
|
|
#endif
|
|
nh = rc.rc_nh_new;
|
|
rtm->rtm_index = nh->nh_ifp->if_index;
|
|
rtm->rtm_flags = rc.rc_rt->rte_flags | nhop_get_rtflags(nh);
|
|
}
|
|
break;
|
|
|
|
case RTM_DELETE:
|
|
error = rib_action(fibnum, RTM_DELETE, &info, &rc);
|
|
if (error == 0) {
|
|
#ifdef ROUTE_MPATH
|
|
if (NH_IS_NHGRP(rc.rc_nh_old) ||
|
|
(rc.rc_nh_new && NH_IS_NHGRP(rc.rc_nh_new))) {
|
|
struct rib_cmd_info rc_simple = {};
|
|
rib_decompose_notification(&rc,
|
|
save_del_notification, (void *)&rc_simple);
|
|
rc = rc_simple;
|
|
}
|
|
#endif
|
|
nh = rc.rc_nh_old;
|
|
}
|
|
break;
|
|
|
|
case RTM_GET:
|
|
error = handle_rtm_get(&info, fibnum, rtm, &rc);
|
|
if (error != 0)
|
|
senderr(error);
|
|
nh = rc.rc_nh_new;
|
|
|
|
if (!can_export_rte(curthread->td_ucred,
|
|
info.rti_info[RTAX_NETMASK] == NULL,
|
|
info.rti_info[RTAX_DST])) {
|
|
senderr(ESRCH);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
senderr(EOPNOTSUPP);
|
|
}
|
|
|
|
if (error == 0) {
|
|
error = update_rtm_from_rc(&info, &rtm, alloc_len, &rc, nh);
|
|
/*
|
|
* Note that some sockaddr pointers may have changed to
|
|
* point to memory outsize @rtm. Some may be pointing
|
|
* to the on-stack variables.
|
|
* Given that, any pointer in @info CANNOT BE USED.
|
|
*/
|
|
|
|
/*
|
|
* scopeid deembedding has been performed while
|
|
* writing updated rtm in rtsock_msg_buffer().
|
|
* With that in mind, skip deembedding procedure below.
|
|
*/
|
|
#ifdef INET6
|
|
rti_need_deembed = 0;
|
|
#endif
|
|
}
|
|
|
|
flush:
|
|
NET_EPOCH_EXIT(et);
|
|
rt = NULL;
|
|
|
|
#ifdef INET6
|
|
if (rtm != NULL) {
|
|
if (rti_need_deembed) {
|
|
/* sin6_scope_id is recovered before sending rtm. */
|
|
sin6 = (struct sockaddr_in6 *)&ss;
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
if (info.rti_info[i] == NULL)
|
|
continue;
|
|
if (info.rti_info[i]->sa_family != AF_INET6)
|
|
continue;
|
|
bcopy(info.rti_info[i], sin6, sizeof(*sin6));
|
|
if (sa6_recoverscope(sin6) == 0)
|
|
bcopy(sin6, info.rti_info[i],
|
|
sizeof(*sin6));
|
|
}
|
|
if (update_rtm_from_info(&info, &rtm, alloc_len) != 0) {
|
|
if (error != 0)
|
|
error = ENOBUFS;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
send_rtm_reply(so, rtm, m, saf, fibnum, error);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sends the prepared reply message in @rtm to all rtsock clients.
|
|
* Frees @m and @rtm.
|
|
*
|
|
*/
|
|
static void
|
|
send_rtm_reply(struct socket *so, struct rt_msghdr *rtm, struct mbuf *m,
|
|
sa_family_t saf, u_int fibnum, int rtm_errno)
|
|
{
|
|
struct rawcb *rp = NULL;
|
|
|
|
/*
|
|
* Check to see if we don't want our own messages.
|
|
*/
|
|
if ((so->so_options & SO_USELOOPBACK) == 0) {
|
|
if (V_route_cb.any_count <= 1) {
|
|
if (rtm != NULL)
|
|
free(rtm, M_TEMP);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
/* There is another listener, so construct message */
|
|
rp = sotorawcb(so);
|
|
}
|
|
|
|
if (rtm != NULL) {
|
|
if (rtm_errno!= 0)
|
|
rtm->rtm_errno = rtm_errno;
|
|
else
|
|
rtm->rtm_flags |= RTF_DONE;
|
|
|
|
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, M_TEMP);
|
|
}
|
|
if (m != NULL) {
|
|
M_SETFIB(m, fibnum);
|
|
m->m_flags |= RTS_FILTER_FIB;
|
|
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, saf);
|
|
rp->rcb_proto.sp_family = family;
|
|
} else
|
|
rt_dispatch(m, saf);
|
|
}
|
|
}
|
|
|
|
static void
|
|
rt_getmetrics(const struct rtentry *rt, const struct nhop_object *nh,
|
|
struct rt_metrics *out)
|
|
{
|
|
|
|
bzero(out, sizeof(*out));
|
|
out->rmx_mtu = nh->nh_mtu;
|
|
out->rmx_weight = rt->rt_weight;
|
|
out->rmx_nhidx = nhop_get_idx(nh);
|
|
/* Kernel -> userland timebase conversion. */
|
|
out->rmx_expire = rt->rt_expire ?
|
|
rt->rt_expire - time_uptime + time_second : 0;
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
#ifdef INET6
|
|
if (sa->sa_family == AF_INET6)
|
|
sa6_embedscope((struct sockaddr_in6 *)sa,
|
|
V_ip6_use_defzone);
|
|
#endif
|
|
rtinfo->rti_info[i] = sa;
|
|
cp += SA_SIZE(sa);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
#ifdef INET
|
|
static inline void
|
|
fill_sockaddr_inet(struct sockaddr_in *sin, struct in_addr addr)
|
|
{
|
|
|
|
const struct sockaddr_in nsin = {
|
|
.sin_family = AF_INET,
|
|
.sin_len = sizeof(struct sockaddr_in),
|
|
.sin_addr = addr,
|
|
};
|
|
*sin = nsin;
|
|
}
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
static inline void
|
|
fill_sockaddr_inet6(struct sockaddr_in6 *sin6, const struct in6_addr *addr6,
|
|
uint32_t scopeid)
|
|
{
|
|
|
|
const struct sockaddr_in6 nsin6 = {
|
|
.sin6_family = AF_INET6,
|
|
.sin6_len = sizeof(struct sockaddr_in6),
|
|
.sin6_addr = *addr6,
|
|
.sin6_scope_id = scopeid,
|
|
};
|
|
*sin6 = nsin6;
|
|
}
|
|
#endif
|
|
|
|
#if defined(INET6) || defined(INET)
|
|
/*
|
|
* Checks if gateway is suitable for lltable operations.
|
|
* Lltable code requires AF_LINK gateway with ifindex
|
|
* and mac address specified.
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
cleanup_xaddrs_lladdr(struct rt_addrinfo *info)
|
|
{
|
|
struct sockaddr_dl *sdl = (struct sockaddr_dl *)info->rti_info[RTAX_GATEWAY];
|
|
|
|
if (sdl->sdl_family != AF_LINK)
|
|
return (EINVAL);
|
|
|
|
if (sdl->sdl_index == 0)
|
|
return (EINVAL);
|
|
|
|
if (offsetof(struct sockaddr_dl, sdl_data) + sdl->sdl_nlen + sdl->sdl_alen > sdl->sdl_len)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
cleanup_xaddrs_gateway(struct rt_addrinfo *info, struct linear_buffer *lb)
|
|
{
|
|
struct sockaddr *gw = info->rti_info[RTAX_GATEWAY];
|
|
struct sockaddr *sa;
|
|
|
|
if (info->rti_flags & RTF_LLDATA)
|
|
return (cleanup_xaddrs_lladdr(info));
|
|
|
|
switch (gw->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
{
|
|
struct sockaddr_in *gw_sin = (struct sockaddr_in *)gw;
|
|
|
|
/* Ensure reads do not go beyoud SA boundary */
|
|
if (SA_SIZE(gw) < offsetof(struct sockaddr_in, sin_zero)) {
|
|
RTS_PID_PRINTF("gateway sin_len too small: %d", gw->sa_len);
|
|
return (EINVAL);
|
|
}
|
|
sa = alloc_sockaddr_aligned(lb, sizeof(struct sockaddr_in));
|
|
if (sa == NULL)
|
|
return (ENOBUFS);
|
|
fill_sockaddr_inet((struct sockaddr_in *)sa, gw_sin->sin_addr);
|
|
info->rti_info[RTAX_GATEWAY] = sa;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
{
|
|
struct sockaddr_in6 *gw_sin6 = (struct sockaddr_in6 *)gw;
|
|
if (gw_sin6->sin6_len < sizeof(struct sockaddr_in6)) {
|
|
RTS_PID_PRINTF("gateway sin6_len too small: %d", gw->sa_len);
|
|
return (EINVAL);
|
|
}
|
|
fill_sockaddr_inet6(gw_sin6, &gw_sin6->sin6_addr, 0);
|
|
break;
|
|
}
|
|
#endif
|
|
case AF_LINK:
|
|
{
|
|
struct sockaddr_dl *gw_sdl;
|
|
|
|
size_t sdl_min_len = offsetof(struct sockaddr_dl, sdl_data);
|
|
gw_sdl = (struct sockaddr_dl *)gw;
|
|
if (gw_sdl->sdl_len < sdl_min_len) {
|
|
RTS_PID_PRINTF("gateway sdl_len too small: %d", gw_sdl->sdl_len);
|
|
return (EINVAL);
|
|
}
|
|
sa = alloc_sockaddr_aligned(lb, sizeof(struct sockaddr_dl_short));
|
|
if (sa == NULL)
|
|
return (ENOBUFS);
|
|
|
|
const struct sockaddr_dl_short sdl = {
|
|
.sdl_family = AF_LINK,
|
|
.sdl_len = sizeof(struct sockaddr_dl_short),
|
|
.sdl_index = gw_sdl->sdl_index,
|
|
};
|
|
*((struct sockaddr_dl_short *)sa) = sdl;
|
|
info->rti_info[RTAX_GATEWAY] = sa;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
remove_netmask(struct rt_addrinfo *info)
|
|
{
|
|
info->rti_info[RTAX_NETMASK] = NULL;
|
|
info->rti_flags |= RTF_HOST;
|
|
info->rti_addrs &= ~RTA_NETMASK;
|
|
}
|
|
|
|
#ifdef INET
|
|
static int
|
|
cleanup_xaddrs_inet(struct rt_addrinfo *info, struct linear_buffer *lb)
|
|
{
|
|
struct sockaddr_in *dst_sa, *mask_sa;
|
|
const int sa_len = sizeof(struct sockaddr_in);
|
|
struct in_addr dst, mask;
|
|
|
|
/* Check & fixup dst/netmask combination first */
|
|
dst_sa = (struct sockaddr_in *)info->rti_info[RTAX_DST];
|
|
mask_sa = (struct sockaddr_in *)info->rti_info[RTAX_NETMASK];
|
|
|
|
/* Ensure reads do not go beyound the buffer size */
|
|
if (SA_SIZE(dst_sa) < offsetof(struct sockaddr_in, sin_zero))
|
|
return (EINVAL);
|
|
|
|
if ((mask_sa != NULL) && mask_sa->sin_len < sizeof(struct sockaddr_in)) {
|
|
/*
|
|
* Some older routing software encode mask length into the
|
|
* sin_len, thus resulting in "truncated" sockaddr.
|
|
*/
|
|
int len = mask_sa->sin_len - offsetof(struct sockaddr_in, sin_addr);
|
|
if (len >= 0) {
|
|
mask.s_addr = 0;
|
|
if (len > sizeof(struct in_addr))
|
|
len = sizeof(struct in_addr);
|
|
memcpy(&mask, &mask_sa->sin_addr, len);
|
|
} else {
|
|
RTS_PID_PRINTF("prefix mask sin_len too small: %d", mask_sa->sin_len);
|
|
return (EINVAL);
|
|
}
|
|
} else
|
|
mask.s_addr = mask_sa ? mask_sa->sin_addr.s_addr : INADDR_BROADCAST;
|
|
|
|
dst.s_addr = htonl(ntohl(dst_sa->sin_addr.s_addr) & ntohl(mask.s_addr));
|
|
|
|
/* Construct new "clean" dst/mask sockaddresses */
|
|
if ((dst_sa = (struct sockaddr_in *)alloc_sockaddr_aligned(lb, sa_len)) == NULL)
|
|
return (ENOBUFS);
|
|
fill_sockaddr_inet(dst_sa, dst);
|
|
info->rti_info[RTAX_DST] = (struct sockaddr *)dst_sa;
|
|
|
|
if (mask.s_addr != INADDR_BROADCAST) {
|
|
if ((mask_sa = (struct sockaddr_in *)alloc_sockaddr_aligned(lb, sa_len)) == NULL)
|
|
return (ENOBUFS);
|
|
fill_sockaddr_inet(mask_sa, mask);
|
|
info->rti_info[RTAX_NETMASK] = (struct sockaddr *)mask_sa;
|
|
info->rti_flags &= ~RTF_HOST;
|
|
} else
|
|
remove_netmask(info);
|
|
|
|
/* Check gateway */
|
|
if (info->rti_info[RTAX_GATEWAY] != NULL)
|
|
return (cleanup_xaddrs_gateway(info, lb));
|
|
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
static int
|
|
cleanup_xaddrs_inet6(struct rt_addrinfo *info, struct linear_buffer *lb)
|
|
{
|
|
struct sockaddr *sa;
|
|
struct sockaddr_in6 *dst_sa, *mask_sa;
|
|
struct in6_addr mask, *dst;
|
|
const int sa_len = sizeof(struct sockaddr_in6);
|
|
|
|
/* Check & fixup dst/netmask combination first */
|
|
dst_sa = (struct sockaddr_in6 *)info->rti_info[RTAX_DST];
|
|
mask_sa = (struct sockaddr_in6 *)info->rti_info[RTAX_NETMASK];
|
|
|
|
if (dst_sa->sin6_len < sizeof(struct sockaddr_in6)) {
|
|
RTS_PID_PRINTF("prefix dst sin6_len too small: %d", dst_sa->sin6_len);
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (mask_sa && mask_sa->sin6_len < sizeof(struct sockaddr_in6)) {
|
|
/*
|
|
* Some older routing software encode mask length into the
|
|
* sin6_len, thus resulting in "truncated" sockaddr.
|
|
*/
|
|
int len = mask_sa->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
|
|
if (len >= 0) {
|
|
bzero(&mask, sizeof(mask));
|
|
if (len > sizeof(struct in6_addr))
|
|
len = sizeof(struct in6_addr);
|
|
memcpy(&mask, &mask_sa->sin6_addr, len);
|
|
} else {
|
|
RTS_PID_PRINTF("rtsock: prefix mask sin6_len too small: %d", mask_sa->sin6_len);
|
|
return (EINVAL);
|
|
}
|
|
} else
|
|
mask = mask_sa ? mask_sa->sin6_addr : in6mask128;
|
|
|
|
dst = &dst_sa->sin6_addr;
|
|
IN6_MASK_ADDR(dst, &mask);
|
|
|
|
if ((sa = alloc_sockaddr_aligned(lb, sa_len)) == NULL)
|
|
return (ENOBUFS);
|
|
fill_sockaddr_inet6((struct sockaddr_in6 *)sa, dst, 0);
|
|
info->rti_info[RTAX_DST] = sa;
|
|
|
|
if (!IN6_ARE_ADDR_EQUAL(&mask, &in6mask128)) {
|
|
if ((sa = alloc_sockaddr_aligned(lb, sa_len)) == NULL)
|
|
return (ENOBUFS);
|
|
fill_sockaddr_inet6((struct sockaddr_in6 *)sa, &mask, 0);
|
|
info->rti_info[RTAX_NETMASK] = sa;
|
|
info->rti_flags &= ~RTF_HOST;
|
|
} else
|
|
remove_netmask(info);
|
|
|
|
/* Check gateway */
|
|
if (info->rti_info[RTAX_GATEWAY] != NULL)
|
|
return (cleanup_xaddrs_gateway(info, lb));
|
|
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
cleanup_xaddrs(struct rt_addrinfo *info, struct linear_buffer *lb)
|
|
{
|
|
int error = EAFNOSUPPORT;
|
|
|
|
if (info->rti_info[RTAX_DST] == NULL)
|
|
return (EINVAL);
|
|
|
|
if (info->rti_flags & RTF_LLDATA) {
|
|
/*
|
|
* arp(8)/ndp(8) sends RTA_NETMASK for the associated
|
|
* prefix along with the actual address in RTA_DST.
|
|
* Remove netmask to avoid unnecessary address masking.
|
|
*/
|
|
remove_netmask(info);
|
|
}
|
|
|
|
switch (info->rti_info[RTAX_DST]->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
error = cleanup_xaddrs_inet(info, lb);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
error = cleanup_xaddrs_inet6(info, lb);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Fill in @dmask with valid netmask leaving original @smask
|
|
* intact. Mostly used with radix netmasks.
|
|
*/
|
|
struct sockaddr *
|
|
rtsock_fix_netmask(const struct sockaddr *dst, const struct sockaddr *smask,
|
|
struct sockaddr_storage *dmask)
|
|
{
|
|
if (dst == NULL || smask == NULL)
|
|
return (NULL);
|
|
|
|
memset(dmask, 0, dst->sa_len);
|
|
memcpy(dmask, smask, smask->sa_len);
|
|
dmask->ss_len = dst->sa_len;
|
|
dmask->ss_family = dst->sa_family;
|
|
|
|
return ((struct sockaddr *)dmask);
|
|
}
|
|
|
|
/*
|
|
* Writes information related to @rtinfo object to newly-allocated mbuf.
|
|
* Assumes MCLBYTES is enough to construct any message.
|
|
* Used for OS notifications of vaious events (if/ifa announces,etc)
|
|
*
|
|
* Returns allocated mbuf or NULL on failure.
|
|
*/
|
|
static struct mbuf *
|
|
rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
|
|
{
|
|
struct sockaddr_storage ss;
|
|
struct rt_msghdr *rtm;
|
|
struct mbuf *m;
|
|
int i;
|
|
struct sockaddr *sa;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
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);
|
|
}
|
|
|
|
/* XXXGL: can we use MJUMPAGESIZE cluster here? */
|
|
KASSERT(len <= MCLBYTES, ("%s: message too big", __func__));
|
|
if (len > MHLEN)
|
|
m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
|
|
else
|
|
m = m_gethdr(M_NOWAIT, MT_DATA);
|
|
if (m == NULL)
|
|
return (m);
|
|
|
|
m->m_pkthdr.len = m->m_len = len;
|
|
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);
|
|
KASSERT(dlen <= sizeof(ss),
|
|
("%s: sockaddr size overflow", __func__));
|
|
bzero(&ss, sizeof(ss));
|
|
bcopy(sa, &ss, sa->sa_len);
|
|
sa = (struct sockaddr *)&ss;
|
|
#ifdef INET6
|
|
if (sa->sa_family == AF_INET6) {
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
(void)sa6_recoverscope(sin6);
|
|
}
|
|
#endif
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Writes information related to @rtinfo object to preallocated buffer.
|
|
* Stores needed size in @plen. If @w is NULL, calculates size without
|
|
* writing.
|
|
* Used for sysctl dumps and rtsock answers (RTM_DEL/RTM_GET) generation.
|
|
*
|
|
* Returns 0 on success.
|
|
*
|
|
*/
|
|
static int
|
|
rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo, struct walkarg *w, int *plen)
|
|
{
|
|
struct sockaddr_storage ss;
|
|
int len, buflen = 0, dlen, i;
|
|
caddr_t cp = NULL;
|
|
struct rt_msghdr *rtm = NULL;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
#ifdef COMPAT_FREEBSD32
|
|
bool compat32 = false;
|
|
#endif
|
|
|
|
switch (type) {
|
|
case RTM_DELADDR:
|
|
case RTM_NEWADDR:
|
|
if (w != NULL && w->w_op == NET_RT_IFLISTL) {
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (w->w_req->flags & SCTL_MASK32) {
|
|
len = sizeof(struct ifa_msghdrl32);
|
|
compat32 = true;
|
|
} else
|
|
#endif
|
|
len = sizeof(struct ifa_msghdrl);
|
|
} else
|
|
len = sizeof(struct ifa_msghdr);
|
|
break;
|
|
|
|
case RTM_IFINFO:
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (w != NULL && w->w_req->flags & SCTL_MASK32) {
|
|
if (w->w_op == NET_RT_IFLISTL)
|
|
len = sizeof(struct if_msghdrl32);
|
|
else
|
|
len = sizeof(struct if_msghdr32);
|
|
compat32 = true;
|
|
break;
|
|
}
|
|
#endif
|
|
if (w != NULL && w->w_op == NET_RT_IFLISTL)
|
|
len = sizeof(struct if_msghdrl);
|
|
else
|
|
len = sizeof(struct if_msghdr);
|
|
break;
|
|
|
|
case RTM_NEWMADDR:
|
|
len = sizeof(struct ifma_msghdr);
|
|
break;
|
|
|
|
default:
|
|
len = sizeof(struct rt_msghdr);
|
|
}
|
|
|
|
if (w != NULL) {
|
|
rtm = (struct rt_msghdr *)w->w_tmem;
|
|
buflen = w->w_tmemsize - len;
|
|
cp = (caddr_t)w->w_tmem + len;
|
|
}
|
|
|
|
rtinfo->rti_addrs = 0;
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
struct sockaddr *sa;
|
|
|
|
if ((sa = rtinfo->rti_info[i]) == NULL)
|
|
continue;
|
|
rtinfo->rti_addrs |= (1 << i);
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (compat32)
|
|
dlen = SA_SIZE32(sa);
|
|
else
|
|
#endif
|
|
dlen = SA_SIZE(sa);
|
|
if (cp != NULL && buflen >= dlen) {
|
|
KASSERT(dlen <= sizeof(ss),
|
|
("%s: sockaddr size overflow", __func__));
|
|
bzero(&ss, sizeof(ss));
|
|
bcopy(sa, &ss, sa->sa_len);
|
|
sa = (struct sockaddr *)&ss;
|
|
#ifdef INET6
|
|
if (sa->sa_family == AF_INET6) {
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
(void)sa6_recoverscope(sin6);
|
|
}
|
|
#endif
|
|
bcopy((caddr_t)sa, cp, (unsigned)dlen);
|
|
cp += dlen;
|
|
buflen -= dlen;
|
|
} else if (cp != NULL) {
|
|
/*
|
|
* Buffer too small. Count needed size
|
|
* and return with error.
|
|
*/
|
|
cp = NULL;
|
|
}
|
|
|
|
len += dlen;
|
|
}
|
|
|
|
if (cp != NULL) {
|
|
dlen = ALIGN(len) - len;
|
|
if (buflen < dlen)
|
|
cp = NULL;
|
|
else {
|
|
bzero(cp, dlen);
|
|
cp += dlen;
|
|
buflen -= dlen;
|
|
}
|
|
}
|
|
len = ALIGN(len);
|
|
|
|
if (cp != NULL) {
|
|
/* fill header iff buffer is large enough */
|
|
rtm->rtm_version = RTM_VERSION;
|
|
rtm->rtm_type = type;
|
|
rtm->rtm_msglen = len;
|
|
}
|
|
|
|
*plen = len;
|
|
|
|
if (w != NULL && cp == NULL)
|
|
return (ENOBUFS);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This routine is called to generate a message from the routing
|
|
* socket indicating that a redirect has occurred, a routing lookup
|
|
* has failed, or that a protocol has detected timeouts to a particular
|
|
* destination.
|
|
*/
|
|
void
|
|
rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error,
|
|
int fibnum)
|
|
{
|
|
struct rt_msghdr *rtm;
|
|
struct mbuf *m;
|
|
struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
|
|
|
|
if (V_route_cb.any_count == 0)
|
|
return;
|
|
m = rtsock_msg_mbuf(type, rtinfo);
|
|
if (m == NULL)
|
|
return;
|
|
|
|
if (fibnum != RT_ALL_FIBS) {
|
|
KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out "
|
|
"of range 0 <= %d < %d", __func__, fibnum, rt_numfibs));
|
|
M_SETFIB(m, fibnum);
|
|
m->m_flags |= RTS_FILTER_FIB;
|
|
}
|
|
|
|
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 ? sa->sa_family : AF_UNSPEC);
|
|
}
|
|
|
|
void
|
|
rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
|
|
{
|
|
|
|
rt_missmsg_fib(type, rtinfo, flags, error, RT_ALL_FIBS);
|
|
}
|
|
|
|
/*
|
|
* 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 (V_route_cb.any_count == 0)
|
|
return;
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
m = rtsock_msg_mbuf(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;
|
|
if_data_copy(ifp, &ifm->ifm_data);
|
|
ifm->ifm_addrs = 0;
|
|
rt_dispatch(m, AF_UNSPEC);
|
|
}
|
|
|
|
/*
|
|
* Announce interface address arrival/withdraw.
|
|
* Please do not call directly, use rt_addrmsg().
|
|
* Assume input data to be valid.
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rtsock_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
|
|
{
|
|
struct rt_addrinfo info;
|
|
struct sockaddr *sa;
|
|
int ncmd;
|
|
struct mbuf *m;
|
|
struct ifa_msghdr *ifam;
|
|
struct ifnet *ifp = ifa->ifa_ifp;
|
|
struct sockaddr_storage ss;
|
|
|
|
if (V_route_cb.any_count == 0)
|
|
return (0);
|
|
|
|
ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
|
|
info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
|
|
info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(
|
|
info.rti_info[RTAX_IFA], ifa->ifa_netmask, &ss);
|
|
info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
|
|
if ((m = rtsock_msg_mbuf(ncmd, &info)) == NULL)
|
|
return (ENOBUFS);
|
|
ifam = mtod(m, struct ifa_msghdr *);
|
|
ifam->ifam_index = ifp->if_index;
|
|
ifam->ifam_metric = ifa->ifa_ifp->if_metric;
|
|
ifam->ifam_flags = ifa->ifa_flags;
|
|
ifam->ifam_addrs = info.rti_addrs;
|
|
|
|
if (fibnum != RT_ALL_FIBS) {
|
|
M_SETFIB(m, fibnum);
|
|
m->m_flags |= RTS_FILTER_FIB;
|
|
}
|
|
|
|
rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Announce route addition/removal to rtsock based on @rt data.
|
|
* Callers are advives to use rt_routemsg() instead of using this
|
|
* function directly.
|
|
* Assume @rt data is consistent.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rtsock_routemsg(int cmd, struct rtentry *rt, struct nhop_object *nh,
|
|
int fibnum)
|
|
{
|
|
union sockaddr_union dst, mask;
|
|
struct rt_addrinfo info;
|
|
|
|
if (V_route_cb.any_count == 0)
|
|
return (0);
|
|
|
|
int family = rt_get_family(rt);
|
|
init_sockaddrs_family(family, &dst.sa, &mask.sa);
|
|
export_rtaddrs(rt, &dst.sa, &mask.sa);
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] = &dst.sa;
|
|
info.rti_info[RTAX_NETMASK] = &mask.sa;
|
|
info.rti_info[RTAX_GATEWAY] = &nh->gw_sa;
|
|
info.rti_flags = rt->rte_flags | nhop_get_rtflags(nh);
|
|
info.rti_ifp = nh->nh_ifp;
|
|
|
|
return (rtsock_routemsg_info(cmd, &info, fibnum));
|
|
}
|
|
|
|
int
|
|
rtsock_routemsg_info(int cmd, struct rt_addrinfo *info, int fibnum)
|
|
{
|
|
struct rt_msghdr *rtm;
|
|
struct sockaddr *sa;
|
|
struct mbuf *m;
|
|
|
|
if (V_route_cb.any_count == 0)
|
|
return (0);
|
|
|
|
if (info->rti_flags & RTF_HOST)
|
|
info->rti_info[RTAX_NETMASK] = NULL;
|
|
|
|
m = rtsock_msg_mbuf(cmd, info);
|
|
if (m == NULL)
|
|
return (ENOBUFS);
|
|
|
|
if (fibnum != RT_ALL_FIBS) {
|
|
KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out "
|
|
"of range 0 <= %d < %d", __func__, fibnum, rt_numfibs));
|
|
M_SETFIB(m, fibnum);
|
|
m->m_flags |= RTS_FILTER_FIB;
|
|
}
|
|
|
|
rtm = mtod(m, struct rt_msghdr *);
|
|
rtm->rtm_addrs = info->rti_addrs;
|
|
if (info->rti_ifp != NULL)
|
|
rtm->rtm_index = info->rti_ifp->if_index;
|
|
/* Add RTF_DONE to indicate command 'completion' required by API */
|
|
info->rti_flags |= RTF_DONE;
|
|
/* Reported routes has to be up */
|
|
if (cmd == RTM_ADD || cmd == RTM_CHANGE)
|
|
info->rti_flags |= RTF_UP;
|
|
rtm->rtm_flags = info->rti_flags;
|
|
|
|
sa = info->rti_info[RTAX_DST];
|
|
rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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 (V_route_cb.any_count == 0)
|
|
return;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_IFA] = ifma->ifma_addr;
|
|
if (ifp && ifp->if_addr)
|
|
info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
|
|
else
|
|
info.rti_info[RTAX_IFP] = 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 = rtsock_msg_mbuf(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 ? ifma->ifma_addr->sa_family : AF_UNSPEC);
|
|
}
|
|
|
|
static struct mbuf *
|
|
rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
|
|
struct rt_addrinfo *info)
|
|
{
|
|
struct if_announcemsghdr *ifan;
|
|
struct mbuf *m;
|
|
|
|
if (V_route_cb.any_count == 0)
|
|
return NULL;
|
|
bzero((caddr_t)info, sizeof(*info));
|
|
m = rtsock_msg_mbuf(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, AF_UNSPEC);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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, AF_UNSPEC);
|
|
}
|
|
|
|
static void
|
|
rt_dispatch(struct mbuf *m, sa_family_t saf)
|
|
{
|
|
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 (saf != AF_UNSPEC) {
|
|
tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
|
|
M_NOWAIT);
|
|
if (tag == NULL) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
*(unsigned short *)(tag + 1) = saf;
|
|
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. */
|
|
}
|
|
|
|
/*
|
|
* Checks if rte can be exported w.r.t jails/vnets.
|
|
*
|
|
* Returns true if it can, false otherwise.
|
|
*/
|
|
static bool
|
|
can_export_rte(struct ucred *td_ucred, bool rt_is_host,
|
|
const struct sockaddr *rt_dst)
|
|
{
|
|
|
|
if ((!rt_is_host) ? jailed_without_vnet(td_ucred)
|
|
: prison_if(td_ucred, rt_dst) != 0)
|
|
return (false);
|
|
return (true);
|
|
}
|
|
|
|
|
|
/*
|
|
* This is used in dumping the kernel table via sysctl().
|
|
*/
|
|
static int
|
|
sysctl_dumpentry(struct rtentry *rt, void *vw)
|
|
{
|
|
struct walkarg *w = vw;
|
|
struct nhop_object *nh;
|
|
int error = 0;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
|
|
export_rtaddrs(rt, w->dst, w->mask);
|
|
if (!can_export_rte(w->w_req->td->td_ucred, rt_is_host(rt), w->dst))
|
|
return (0);
|
|
nh = rt_get_raw_nhop(rt);
|
|
#ifdef ROUTE_MPATH
|
|
if (NH_IS_NHGRP(nh)) {
|
|
struct weightened_nhop *wn;
|
|
uint32_t num_nhops;
|
|
wn = nhgrp_get_nhops((struct nhgrp_object *)nh, &num_nhops);
|
|
for (int i = 0; i < num_nhops; i++) {
|
|
error = sysctl_dumpnhop(rt, wn[i].nh, wn[i].weight, w);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
} else
|
|
#endif
|
|
error = sysctl_dumpnhop(rt, nh, rt->rt_weight, w);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
static int
|
|
sysctl_dumpnhop(struct rtentry *rt, struct nhop_object *nh, uint32_t weight,
|
|
struct walkarg *w)
|
|
{
|
|
struct rt_addrinfo info;
|
|
int error = 0, size;
|
|
uint32_t rtflags;
|
|
|
|
rtflags = nhop_get_rtflags(nh);
|
|
|
|
if (w->w_op == NET_RT_FLAGS && !(rtflags & w->w_arg))
|
|
return (0);
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] = w->dst;
|
|
info.rti_info[RTAX_GATEWAY] = &nh->gw_sa;
|
|
info.rti_info[RTAX_NETMASK] = (rtflags & RTF_HOST) ? NULL : w->mask;
|
|
info.rti_info[RTAX_GENMASK] = 0;
|
|
if (nh->nh_ifp && !(nh->nh_ifp->if_flags & IFF_DYING)) {
|
|
info.rti_info[RTAX_IFP] = nh->nh_ifp->if_addr->ifa_addr;
|
|
info.rti_info[RTAX_IFA] = nh->nh_ifa->ifa_addr;
|
|
if (nh->nh_ifp->if_flags & IFF_POINTOPOINT)
|
|
info.rti_info[RTAX_BRD] = nh->nh_ifa->ifa_dstaddr;
|
|
}
|
|
if ((error = rtsock_msg_buffer(RTM_GET, &info, w, &size)) != 0)
|
|
return (error);
|
|
if (w->w_req && w->w_tmem) {
|
|
struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
|
|
|
|
bzero(&rtm->rtm_index,
|
|
sizeof(*rtm) - offsetof(struct rt_msghdr, rtm_index));
|
|
|
|
/*
|
|
* rte flags may consist of RTF_HOST (duplicated in nhop rtflags)
|
|
* and RTF_UP (if entry is linked, which is always true here).
|
|
* Given that, use nhop rtflags & add RTF_UP.
|
|
*/
|
|
rtm->rtm_flags = rtflags | RTF_UP;
|
|
if (rtm->rtm_flags & RTF_GWFLAG_COMPAT)
|
|
rtm->rtm_flags = RTF_GATEWAY |
|
|
(rtm->rtm_flags & ~RTF_GWFLAG_COMPAT);
|
|
rt_getmetrics(rt, nh, &rtm->rtm_rmx);
|
|
rtm->rtm_rmx.rmx_weight = weight;
|
|
rtm->rtm_index = nh->nh_ifp->if_index;
|
|
rtm->rtm_addrs = info.rti_addrs;
|
|
error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
|
|
return (error);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sysctl_iflist_ifml(struct ifnet *ifp, const struct if_data *src_ifd,
|
|
struct rt_addrinfo *info, struct walkarg *w, int len)
|
|
{
|
|
struct if_msghdrl *ifm;
|
|
struct if_data *ifd;
|
|
|
|
ifm = (struct if_msghdrl *)w->w_tmem;
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (w->w_req->flags & SCTL_MASK32) {
|
|
struct if_msghdrl32 *ifm32;
|
|
|
|
ifm32 = (struct if_msghdrl32 *)ifm;
|
|
ifm32->ifm_addrs = info->rti_addrs;
|
|
ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifm32->ifm_index = ifp->if_index;
|
|
ifm32->_ifm_spare1 = 0;
|
|
ifm32->ifm_len = sizeof(*ifm32);
|
|
ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data);
|
|
ifm32->_ifm_spare2 = 0;
|
|
ifd = &ifm32->ifm_data;
|
|
} else
|
|
#endif
|
|
{
|
|
ifm->ifm_addrs = info->rti_addrs;
|
|
ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifm->ifm_index = ifp->if_index;
|
|
ifm->_ifm_spare1 = 0;
|
|
ifm->ifm_len = sizeof(*ifm);
|
|
ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data);
|
|
ifm->_ifm_spare2 = 0;
|
|
ifd = &ifm->ifm_data;
|
|
}
|
|
|
|
memcpy(ifd, src_ifd, sizeof(*ifd));
|
|
|
|
return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
|
|
}
|
|
|
|
static int
|
|
sysctl_iflist_ifm(struct ifnet *ifp, const struct if_data *src_ifd,
|
|
struct rt_addrinfo *info, struct walkarg *w, int len)
|
|
{
|
|
struct if_msghdr *ifm;
|
|
struct if_data *ifd;
|
|
|
|
ifm = (struct if_msghdr *)w->w_tmem;
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (w->w_req->flags & SCTL_MASK32) {
|
|
struct if_msghdr32 *ifm32;
|
|
|
|
ifm32 = (struct if_msghdr32 *)ifm;
|
|
ifm32->ifm_addrs = info->rti_addrs;
|
|
ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifm32->ifm_index = ifp->if_index;
|
|
ifm32->_ifm_spare1 = 0;
|
|
ifd = &ifm32->ifm_data;
|
|
} else
|
|
#endif
|
|
{
|
|
ifm->ifm_addrs = info->rti_addrs;
|
|
ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifm->ifm_index = ifp->if_index;
|
|
ifm->_ifm_spare1 = 0;
|
|
ifd = &ifm->ifm_data;
|
|
}
|
|
|
|
memcpy(ifd, src_ifd, sizeof(*ifd));
|
|
|
|
return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
|
|
}
|
|
|
|
static int
|
|
sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info,
|
|
struct walkarg *w, int len)
|
|
{
|
|
struct ifa_msghdrl *ifam;
|
|
struct if_data *ifd;
|
|
|
|
ifam = (struct ifa_msghdrl *)w->w_tmem;
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (w->w_req->flags & SCTL_MASK32) {
|
|
struct ifa_msghdrl32 *ifam32;
|
|
|
|
ifam32 = (struct ifa_msghdrl32 *)ifam;
|
|
ifam32->ifam_addrs = info->rti_addrs;
|
|
ifam32->ifam_flags = ifa->ifa_flags;
|
|
ifam32->ifam_index = ifa->ifa_ifp->if_index;
|
|
ifam32->_ifam_spare1 = 0;
|
|
ifam32->ifam_len = sizeof(*ifam32);
|
|
ifam32->ifam_data_off =
|
|
offsetof(struct ifa_msghdrl32, ifam_data);
|
|
ifam32->ifam_metric = ifa->ifa_ifp->if_metric;
|
|
ifd = &ifam32->ifam_data;
|
|
} else
|
|
#endif
|
|
{
|
|
ifam->ifam_addrs = info->rti_addrs;
|
|
ifam->ifam_flags = ifa->ifa_flags;
|
|
ifam->ifam_index = ifa->ifa_ifp->if_index;
|
|
ifam->_ifam_spare1 = 0;
|
|
ifam->ifam_len = sizeof(*ifam);
|
|
ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data);
|
|
ifam->ifam_metric = ifa->ifa_ifp->if_metric;
|
|
ifd = &ifam->ifam_data;
|
|
}
|
|
|
|
bzero(ifd, sizeof(*ifd));
|
|
ifd->ifi_datalen = sizeof(struct if_data);
|
|
ifd->ifi_ipackets = counter_u64_fetch(ifa->ifa_ipackets);
|
|
ifd->ifi_opackets = counter_u64_fetch(ifa->ifa_opackets);
|
|
ifd->ifi_ibytes = counter_u64_fetch(ifa->ifa_ibytes);
|
|
ifd->ifi_obytes = counter_u64_fetch(ifa->ifa_obytes);
|
|
|
|
/* Fixup if_data carp(4) vhid. */
|
|
if (carp_get_vhid_p != NULL)
|
|
ifd->ifi_vhid = (*carp_get_vhid_p)(ifa);
|
|
|
|
return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
|
|
}
|
|
|
|
static int
|
|
sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info,
|
|
struct walkarg *w, int len)
|
|
{
|
|
struct ifa_msghdr *ifam;
|
|
|
|
ifam = (struct ifa_msghdr *)w->w_tmem;
|
|
ifam->ifam_addrs = info->rti_addrs;
|
|
ifam->ifam_flags = ifa->ifa_flags;
|
|
ifam->ifam_index = ifa->ifa_ifp->if_index;
|
|
ifam->_ifam_spare1 = 0;
|
|
ifam->ifam_metric = ifa->ifa_ifp->if_metric;
|
|
|
|
return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
|
|
}
|
|
|
|
static int
|
|
sysctl_iflist(int af, struct walkarg *w)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
struct if_data ifd;
|
|
struct rt_addrinfo info;
|
|
int len, error = 0;
|
|
struct sockaddr_storage ss;
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
bzero(&ifd, sizeof(ifd));
|
|
CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
|
|
if (w->w_arg && w->w_arg != ifp->if_index)
|
|
continue;
|
|
if_data_copy(ifp, &ifd);
|
|
ifa = ifp->if_addr;
|
|
info.rti_info[RTAX_IFP] = ifa->ifa_addr;
|
|
error = rtsock_msg_buffer(RTM_IFINFO, &info, w, &len);
|
|
if (error != 0)
|
|
goto done;
|
|
info.rti_info[RTAX_IFP] = NULL;
|
|
if (w->w_req && w->w_tmem) {
|
|
if (w->w_op == NET_RT_IFLISTL)
|
|
error = sysctl_iflist_ifml(ifp, &ifd, &info, w,
|
|
len);
|
|
else
|
|
error = sysctl_iflist_ifm(ifp, &ifd, &info, w,
|
|
len);
|
|
if (error)
|
|
goto done;
|
|
}
|
|
while ((ifa = CK_STAILQ_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] = rtsock_fix_netmask(
|
|
ifa->ifa_addr, ifa->ifa_netmask, &ss);
|
|
info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
|
|
error = rtsock_msg_buffer(RTM_NEWADDR, &info, w, &len);
|
|
if (error != 0)
|
|
goto done;
|
|
if (w->w_req && w->w_tmem) {
|
|
if (w->w_op == NET_RT_IFLISTL)
|
|
error = sysctl_iflist_ifaml(ifa, &info,
|
|
w, len);
|
|
else
|
|
error = sysctl_iflist_ifam(ifa, &info,
|
|
w, len);
|
|
if (error)
|
|
goto done;
|
|
}
|
|
}
|
|
info.rti_info[RTAX_IFA] = NULL;
|
|
info.rti_info[RTAX_NETMASK] = NULL;
|
|
info.rti_info[RTAX_BRD] = NULL;
|
|
}
|
|
done:
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sysctl_ifmalist(int af, struct walkarg *w)
|
|
{
|
|
struct rt_addrinfo info;
|
|
struct ifaddr *ifa;
|
|
struct ifmultiaddr *ifma;
|
|
struct ifnet *ifp;
|
|
int error, len;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
|
|
error = 0;
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
|
|
CK_STAILQ_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;
|
|
CK_STAILQ_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;
|
|
error = rtsock_msg_buffer(RTM_NEWMADDR, &info, w, &len);
|
|
if (error != 0)
|
|
break;
|
|
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;
|
|
ifmam->_ifmam_spare1 = 0;
|
|
error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
|
|
if (error != 0)
|
|
break;
|
|
}
|
|
}
|
|
if (error != 0)
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
rtable_sysctl_dump(uint32_t fibnum, int family, struct walkarg *w)
|
|
{
|
|
union sockaddr_union sa_dst, sa_mask;
|
|
|
|
w->family = family;
|
|
w->dst = (struct sockaddr *)&sa_dst;
|
|
w->mask = (struct sockaddr *)&sa_mask;
|
|
|
|
init_sockaddrs_family(family, w->dst, w->mask);
|
|
|
|
rib_walk(fibnum, family, false, sysctl_dumpentry, w);
|
|
}
|
|
|
|
static int
|
|
sysctl_rtsock(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct epoch_tracker et;
|
|
int *name = (int *)arg1;
|
|
u_int namelen = arg2;
|
|
struct rib_head *rnh = NULL; /* silence compiler. */
|
|
int i, lim, error = EINVAL;
|
|
int fib = 0;
|
|
u_char af;
|
|
struct walkarg w;
|
|
|
|
if (namelen < 3)
|
|
return (EINVAL);
|
|
|
|
name++;
|
|
namelen--;
|
|
if (req->newptr)
|
|
return (EPERM);
|
|
if (name[1] == NET_RT_DUMP || name[1] == NET_RT_NHOP || name[1] == NET_RT_NHGRP) {
|
|
if (namelen == 3)
|
|
fib = req->td->td_proc->p_fibnum;
|
|
else if (namelen == 4)
|
|
fib = (name[3] == RT_ALL_FIBS) ?
|
|
req->td->td_proc->p_fibnum : name[3];
|
|
else
|
|
return ((namelen < 3) ? EISDIR : ENOTDIR);
|
|
if (fib < 0 || fib >= rt_numfibs)
|
|
return (EINVAL);
|
|
} else 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);
|
|
|
|
/*
|
|
* Allocate reply buffer in advance.
|
|
* All rtsock messages has maximum length of u_short.
|
|
*/
|
|
w.w_tmemsize = 65536;
|
|
w.w_tmem = malloc(w.w_tmemsize, M_TEMP, M_WAITOK);
|
|
|
|
NET_EPOCH_ENTER(et);
|
|
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(fib, i);
|
|
if (rnh != NULL) {
|
|
rtable_sysctl_dump(fib, i, &w);
|
|
} else if (af != 0)
|
|
error = EAFNOSUPPORT;
|
|
}
|
|
break;
|
|
case NET_RT_NHOP:
|
|
case NET_RT_NHGRP:
|
|
/* Allow dumping one specific af/fib at a time */
|
|
if (namelen < 4) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
fib = name[3];
|
|
if (fib < 0 || fib > rt_numfibs) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
rnh = rt_tables_get_rnh(fib, af);
|
|
if (rnh == NULL) {
|
|
error = EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
if (w.w_op == NET_RT_NHOP)
|
|
error = nhops_dump_sysctl(rnh, w.w_req);
|
|
else
|
|
#ifdef ROUTE_MPATH
|
|
error = nhgrp_dump_sysctl(rnh, w.w_req);
|
|
#else
|
|
error = ENOTSUP;
|
|
#endif
|
|
break;
|
|
case NET_RT_IFLIST:
|
|
case NET_RT_IFLISTL:
|
|
error = sysctl_iflist(af, &w);
|
|
break;
|
|
|
|
case NET_RT_IFMALIST:
|
|
error = sysctl_ifmalist(af, &w);
|
|
break;
|
|
}
|
|
NET_EPOCH_EXIT(et);
|
|
|
|
free(w.w_tmem, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD | CTLFLAG_MPSAFE,
|
|
sysctl_rtsock, "Return route tables and interface/address lists");
|
|
|
|
/*
|
|
* 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[nitems(routesw)]
|
|
};
|
|
|
|
VNET_DOMAIN_SET(route);
|