[39e6e65a] | 1 | /* |
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| 2 | * Copyright (c) 1988, 1991, 1993 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 4. Neither the name of the University nor the names of its contributors |
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| 14 | * may be used to endorse or promote products derived from this software |
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| 15 | * without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 27 | * SUCH DAMAGE. |
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| 28 | * |
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[1af76095] | 29 | * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 |
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| 30 | * $FreeBSD: src/sys/net/rtsock.c,v 1.122 2005/03/26 21:49:43 sam Exp $ |
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[39e6e65a] | 31 | */ |
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| 32 | |
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[1af76095] | 33 | /* |
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| 34 | * $Id$ |
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| 35 | */ |
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| 36 | |
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[39e6e65a] | 37 | #include <sys/param.h> |
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[c301570] | 38 | #include <rtems/bsd/sys/queue.h> |
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[39e6e65a] | 39 | #include <sys/systm.h> |
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| 40 | #include <sys/kernel.h> |
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| 41 | #include <sys/sysctl.h> |
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| 42 | #include <sys/proc.h> |
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| 43 | #include <sys/mbuf.h> |
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| 44 | #include <sys/socket.h> |
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| 45 | #include <sys/socketvar.h> |
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| 46 | #include <sys/domain.h> |
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| 47 | #include <sys/protosw.h> |
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| 48 | |
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| 49 | #include <net/if.h> |
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| 50 | #include <net/route.h> |
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| 51 | #include <net/raw_cb.h> |
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| 52 | |
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[300c071c] | 53 | static struct sockaddr route_dst = { 2, PF_ROUTE, { 0 } }; |
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| 54 | static struct sockaddr route_src = { 2, PF_ROUTE, { 0 } }; |
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| 55 | static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, { 0 } }; |
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| 56 | static struct sockproto route_proto = { PF_ROUTE, 0 }; |
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[39e6e65a] | 57 | |
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| 58 | struct walkarg { |
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| 59 | int w_tmemsize; |
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| 60 | int w_op, w_arg; |
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| 61 | caddr_t w_tmem; |
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| 62 | struct sysctl_req *w_req; |
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| 63 | }; |
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| 64 | |
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[1af76095] | 65 | static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo); |
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| 66 | static int rt_msg2(int type, struct rt_addrinfo *rtinfo, |
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| 67 | caddr_t cp, struct walkarg *w); |
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| 68 | static int rt_xaddrs(caddr_t cp, caddr_t cplim, |
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| 69 | struct rt_addrinfo *rtinfo); |
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| 70 | static int sysctl_dumpentry(struct radix_node *rn, void *vw); |
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| 71 | static int sysctl_iflist(int af, struct walkarg *w); |
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| 72 | static int route_output(struct mbuf *m, struct socket *so); |
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| 73 | static int route_usrreq(struct socket *, |
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| 74 | int, struct mbuf *, struct mbuf *, struct mbuf *); |
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| 75 | static void rt_setmetrics(u_long which, const struct rt_metrics *in, |
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| 76 | struct rt_metrics *out); |
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[39e6e65a] | 77 | |
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| 78 | /*ARGSUSED*/ |
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| 79 | static int |
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[42e10fa2] | 80 | route_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, |
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| 81 | struct mbuf *control) |
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[39e6e65a] | 82 | { |
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[1af76095] | 83 | int error = 0; |
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| 84 | struct rawcb *rp = sotorawcb(so); |
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[39e6e65a] | 85 | int s; |
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| 86 | |
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| 87 | if (req == PRU_ATTACH) { |
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| 88 | MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); |
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| 89 | so->so_pcb = (caddr_t)rp; |
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| 90 | if (so->so_pcb) |
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| 91 | bzero(so->so_pcb, sizeof(*rp)); |
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| 92 | } |
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| 93 | if (req == PRU_DETACH && rp) { |
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| 94 | int af = rp->rcb_proto.sp_protocol; |
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| 95 | if (af == AF_INET) |
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| 96 | route_cb.ip_count--; |
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| 97 | else if (af == AF_IPX) |
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| 98 | route_cb.ipx_count--; |
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| 99 | else if (af == AF_ISO) |
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| 100 | route_cb.iso_count--; |
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| 101 | route_cb.any_count--; |
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| 102 | } |
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| 103 | s = splnet(); |
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| 104 | error = raw_usrreq(so, req, m, nam, control); |
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| 105 | rp = sotorawcb(so); |
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| 106 | if (req == PRU_ATTACH && rp) { |
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| 107 | int af = rp->rcb_proto.sp_protocol; |
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| 108 | if (error) { |
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| 109 | free((caddr_t)rp, M_PCB); |
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| 110 | splx(s); |
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| 111 | return (error); |
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| 112 | } |
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| 113 | if (af == AF_INET) |
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| 114 | route_cb.ip_count++; |
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| 115 | else if (af == AF_IPX) |
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| 116 | route_cb.ipx_count++; |
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| 117 | else if (af == AF_ISO) |
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| 118 | route_cb.iso_count++; |
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| 119 | rp->rcb_faddr = &route_src; |
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| 120 | route_cb.any_count++; |
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| 121 | soisconnected(so); |
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| 122 | so->so_options |= SO_USELOOPBACK; |
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| 123 | } |
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| 124 | splx(s); |
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| 125 | return (error); |
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| 126 | } |
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| 127 | |
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| 128 | /*ARGSUSED*/ |
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| 129 | static int |
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[1af76095] | 130 | route_output(struct mbuf *m, struct socket *so) |
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[39e6e65a] | 131 | { |
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[1af76095] | 132 | #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0) |
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| 133 | struct rt_msghdr *rtm = NULL; |
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| 134 | struct rtentry *rt = NULL; |
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[39e6e65a] | 135 | struct rtentry *saved_nrt = 0; |
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| 136 | struct radix_node_head *rnh; |
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| 137 | struct rt_addrinfo info; |
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| 138 | int len, error = 0; |
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[1af76095] | 139 | struct ifnet *ifp = NULL; |
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| 140 | struct ifaddr *ifa = NULL; |
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[39e6e65a] | 141 | |
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| 142 | #define senderr(e) { error = e; goto flush;} |
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[1af76095] | 143 | if (m == NULL || ((m->m_len < sizeof(long)) && |
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| 144 | (m = m_pullup(m, sizeof(long))) == NULL)) |
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[39e6e65a] | 145 | return (ENOBUFS); |
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| 146 | if ((m->m_flags & M_PKTHDR) == 0) |
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| 147 | panic("route_output"); |
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| 148 | len = m->m_pkthdr.len; |
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| 149 | if (len < sizeof(*rtm) || |
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| 150 | len != mtod(m, struct rt_msghdr *)->rtm_msglen) { |
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[1af76095] | 151 | info.rti_info[RTAX_DST] = NULL; |
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[39e6e65a] | 152 | senderr(EINVAL); |
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| 153 | } |
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| 154 | R_Malloc(rtm, struct rt_msghdr *, len); |
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[1af76095] | 155 | if (rtm == NULL) { |
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| 156 | info.rti_info[RTAX_DST] = NULL; |
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[39e6e65a] | 157 | senderr(ENOBUFS); |
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| 158 | } |
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| 159 | m_copydata(m, 0, len, (caddr_t)rtm); |
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| 160 | if (rtm->rtm_version != RTM_VERSION) { |
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[1af76095] | 161 | info.rti_info[RTAX_DST] = NULL; |
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[39e6e65a] | 162 | senderr(EPROTONOSUPPORT); |
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| 163 | } |
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| 164 | info.rti_addrs = rtm->rtm_addrs; |
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| 165 | if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) { |
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[1af76095] | 166 | info.rti_info[RTAX_DST] = NULL; |
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[39e6e65a] | 167 | senderr(EINVAL); |
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| 168 | } |
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[1af76095] | 169 | if (info.rti_info[RTAX_DST] == NULL || |
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| 170 | info.rti_info[RTAX_DST]->sa_family >= AF_MAX || |
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| 171 | (info.rti_info[RTAX_GATEWAY] != NULL && |
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| 172 | info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) |
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[39e6e65a] | 173 | senderr(EINVAL); |
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[1af76095] | 174 | if (info.rti_info[RTAX_GENMASK]) { |
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[39e6e65a] | 175 | struct radix_node *t; |
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[1af76095] | 176 | t = rn_addmask((caddr_t) info.rti_info[RTAX_GENMASK], 0, 1); |
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| 177 | if (t != NULL && |
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| 178 | Bcmp(info.rti_info[RTAX_GENMASK], t->rn_key, *(u_char *)info.rti_info[RTAX_GENMASK]) == 0) |
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| 179 | info.rti_info[RTAX_GENMASK] = |
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| 180 | (struct sockaddr *)t->rn_key; |
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[39e6e65a] | 181 | else |
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| 182 | senderr(ENOBUFS); |
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| 183 | } |
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| 184 | switch (rtm->rtm_type) { |
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| 185 | |
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| 186 | case RTM_ADD: |
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[1af76095] | 187 | if (info.rti_info[RTAX_GATEWAY] == NULL) |
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[39e6e65a] | 188 | senderr(EINVAL); |
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[1af76095] | 189 | error = rtrequest(RTM_ADD, info.rti_info[RTAX_DST], info.rti_info[RTAX_GATEWAY], info.rti_info[RTAX_NETMASK], |
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[39e6e65a] | 190 | rtm->rtm_flags, &saved_nrt); |
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| 191 | if (error == 0 && saved_nrt) { |
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| 192 | rt_setmetrics(rtm->rtm_inits, |
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| 193 | &rtm->rtm_rmx, &saved_nrt->rt_rmx); |
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| 194 | saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); |
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| 195 | saved_nrt->rt_rmx.rmx_locks |= |
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| 196 | (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); |
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| 197 | saved_nrt->rt_refcnt--; |
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[1af76095] | 198 | saved_nrt->rt_genmask = info.rti_info[RTAX_GENMASK]; |
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[39e6e65a] | 199 | } |
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| 200 | break; |
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| 201 | |
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| 202 | case RTM_DELETE: |
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[1af76095] | 203 | error = rtrequest(RTM_DELETE, info.rti_info[RTAX_DST], info.rti_info[RTAX_GATEWAY], info.rti_info[RTAX_NETMASK], |
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[39e6e65a] | 204 | rtm->rtm_flags, &saved_nrt); |
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| 205 | if (error == 0) { |
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| 206 | if ((rt = saved_nrt)) |
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| 207 | rt->rt_refcnt++; |
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| 208 | goto report; |
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| 209 | } |
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| 210 | break; |
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| 211 | |
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| 212 | case RTM_GET: |
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| 213 | case RTM_CHANGE: |
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| 214 | case RTM_LOCK: |
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[1af76095] | 215 | rnh = rt_tables[info.rti_info[RTAX_DST]->sa_family]; |
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| 216 | if (rnh == NULL) { |
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[39e6e65a] | 217 | senderr(EAFNOSUPPORT); |
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[ff0f694d] | 218 | } else if ((rt = (struct rtentry *) |
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[1af76095] | 219 | rnh->rnh_lookup(info.rti_info[RTAX_DST], info.rti_info[RTAX_NETMASK], rnh))) |
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[39e6e65a] | 220 | rt->rt_refcnt++; |
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| 221 | else |
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| 222 | senderr(ESRCH); |
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| 223 | switch(rtm->rtm_type) { |
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| 224 | |
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| 225 | case RTM_GET: |
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| 226 | report: |
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[1af76095] | 227 | info.rti_info[RTAX_DST] = rt_key(rt); |
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| 228 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
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| 229 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
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| 230 | info.rti_info[RTAX_GENMASK] = rt->rt_genmask; |
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[39e6e65a] | 231 | if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { |
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| 232 | ifp = rt->rt_ifp; |
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| 233 | if (ifp) { |
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[1af76095] | 234 | info.rti_info[RTAX_IFP] = ifp->if_addrlist->ifa_addr; |
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| 235 | info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; |
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[39e6e65a] | 236 | rtm->rtm_index = ifp->if_index; |
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| 237 | } else { |
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[1af76095] | 238 | info.rti_info[RTAX_IFP] = NULL; |
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| 239 | info.rti_info[RTAX_IFA] = NULL; |
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[39e6e65a] | 240 | } |
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| 241 | } |
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[1af76095] | 242 | len = rt_msg2(rtm->rtm_type, &info, NULL, NULL); |
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[39e6e65a] | 243 | if (len > rtm->rtm_msglen) { |
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| 244 | struct rt_msghdr *new_rtm; |
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| 245 | R_Malloc(new_rtm, struct rt_msghdr *, len); |
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[1af76095] | 246 | if (new_rtm == NULL) { |
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[39e6e65a] | 247 | senderr(ENOBUFS); |
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[1af76095] | 248 | } |
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[39e6e65a] | 249 | Bcopy(rtm, new_rtm, rtm->rtm_msglen); |
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| 250 | Free(rtm); rtm = new_rtm; |
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| 251 | } |
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[1af76095] | 252 | (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL); |
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[39e6e65a] | 253 | rtm->rtm_flags = rt->rt_flags; |
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| 254 | rtm->rtm_rmx = rt->rt_rmx; |
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| 255 | rtm->rtm_addrs = info.rti_addrs; |
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| 256 | break; |
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| 257 | |
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| 258 | case RTM_CHANGE: |
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[1af76095] | 259 | if (info.rti_info[RTAX_GATEWAY] && (error = rt_setgate(rt, rt_key(rt), info.rti_info[RTAX_GATEWAY]))) |
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[39e6e65a] | 260 | senderr(error); |
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| 261 | |
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| 262 | /* |
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| 263 | * If they tried to change things but didn't specify |
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| 264 | * the required gateway, then just use the old one. |
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| 265 | * This can happen if the user tries to change the |
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| 266 | * flags on the default route without changing the |
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| 267 | * default gateway. Changing flags still doesn't work. |
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| 268 | */ |
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[1af76095] | 269 | if ((rt->rt_flags & RTF_GATEWAY) && !info.rti_info[RTAX_GATEWAY]) |
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| 270 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
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[39e6e65a] | 271 | |
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| 272 | /* new gateway could require new ifaddr, ifp; |
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| 273 | flags may also be different; ifp may be specified |
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| 274 | by ll sockaddr when protocol address is ambiguous */ |
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[1af76095] | 275 | if (info.rti_info[RTAX_IFP] && (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && |
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| 276 | (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || info.rti_info[RTAX_GATEWAY])) |
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| 277 | ifa = ifaof_ifpforaddr(info.rti_info[RTAX_IFA] ? info.rti_info[RTAX_IFA] : info.rti_info[RTAX_GATEWAY], |
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[39e6e65a] | 278 | ifp); |
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[1af76095] | 279 | else if ((info.rti_info[RTAX_IFA] && (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || |
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| 280 | (info.rti_info[RTAX_GATEWAY] && (ifa = ifa_ifwithroute(rt->rt_flags, |
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| 281 | rt_key(rt), info.rti_info[RTAX_GATEWAY])))) |
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[39e6e65a] | 282 | ifp = ifa->ifa_ifp; |
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| 283 | if (ifa) { |
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[1af76095] | 284 | struct ifaddr *oifa = rt->rt_ifa; |
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[39e6e65a] | 285 | if (oifa != ifa) { |
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| 286 | if (oifa && oifa->ifa_rtrequest) |
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| 287 | oifa->ifa_rtrequest(RTM_DELETE, |
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[1af76095] | 288 | rt, info.rti_info[RTAX_GATEWAY]); |
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[39e6e65a] | 289 | IFAFREE(rt->rt_ifa); |
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| 290 | rt->rt_ifa = ifa; |
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| 291 | ifa->ifa_refcnt++; |
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| 292 | rt->rt_ifp = ifp; |
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| 293 | } |
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| 294 | } |
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| 295 | rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, |
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| 296 | &rt->rt_rmx); |
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| 297 | if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) |
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[1af76095] | 298 | rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info.rti_info[RTAX_GATEWAY]); |
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| 299 | if (info.rti_info[RTAX_GENMASK]) |
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| 300 | rt->rt_genmask = info.rti_info[RTAX_GENMASK]; |
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| 301 | /* FALLTHROUGH */ |
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[39e6e65a] | 302 | case RTM_LOCK: |
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| 303 | rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); |
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| 304 | rt->rt_rmx.rmx_locks |= |
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| 305 | (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); |
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| 306 | break; |
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| 307 | } |
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| 308 | break; |
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| 309 | |
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| 310 | default: |
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| 311 | senderr(EOPNOTSUPP); |
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| 312 | } |
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| 313 | |
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| 314 | flush: |
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| 315 | if (rtm) { |
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| 316 | if (error) |
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| 317 | rtm->rtm_errno = error; |
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| 318 | else |
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| 319 | rtm->rtm_flags |= RTF_DONE; |
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| 320 | } |
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[1af76095] | 321 | if (rt) /* XXX can this be true? */ |
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[39e6e65a] | 322 | rtfree(rt); |
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| 323 | { |
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[1af76095] | 324 | struct rawcb *rp = NULL; |
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[39e6e65a] | 325 | /* |
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| 326 | * Check to see if we don't want our own messages. |
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| 327 | */ |
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| 328 | if ((so->so_options & SO_USELOOPBACK) == 0) { |
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| 329 | if (route_cb.any_count <= 1) { |
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| 330 | if (rtm) |
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| 331 | Free(rtm); |
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| 332 | m_freem(m); |
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| 333 | return (error); |
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| 334 | } |
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| 335 | /* There is another listener, so construct message */ |
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| 336 | rp = sotorawcb(so); |
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| 337 | } |
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| 338 | if (rtm) { |
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| 339 | m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); |
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| 340 | Free(rtm); |
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| 341 | } |
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| 342 | if (rp) |
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| 343 | rp->rcb_proto.sp_family = 0; /* Avoid us */ |
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[1af76095] | 344 | if (info.rti_info[RTAX_DST]) |
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| 345 | route_proto.sp_protocol = info.rti_info[RTAX_DST]->sa_family; |
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[39e6e65a] | 346 | raw_input(m, &route_proto, &route_src, &route_dst); |
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| 347 | if (rp) |
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| 348 | rp->rcb_proto.sp_family = PF_ROUTE; |
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| 349 | } |
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| 350 | return (error); |
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[1af76095] | 351 | #undef sa_equal |
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[39e6e65a] | 352 | } |
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| 353 | |
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| 354 | static void |
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[1af76095] | 355 | rt_setmetrics(u_long which, const struct rt_metrics *in, |
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| 356 | struct rt_metrics *out) |
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[39e6e65a] | 357 | { |
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| 358 | #define metric(f, e) if (which & (f)) out->e = in->e; |
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| 359 | metric(RTV_RPIPE, rmx_recvpipe); |
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| 360 | metric(RTV_SPIPE, rmx_sendpipe); |
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| 361 | metric(RTV_SSTHRESH, rmx_ssthresh); |
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| 362 | metric(RTV_RTT, rmx_rtt); |
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| 363 | metric(RTV_RTTVAR, rmx_rttvar); |
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| 364 | metric(RTV_HOPCOUNT, rmx_hopcount); |
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| 365 | metric(RTV_MTU, rmx_mtu); |
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| 366 | metric(RTV_EXPIRE, rmx_expire); |
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| 367 | #undef metric |
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| 368 | } |
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| 369 | |
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| 370 | #define ROUNDUP(a) \ |
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| 371 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) |
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| 372 | #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) |
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| 373 | |
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| 374 | |
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| 375 | /* |
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| 376 | * Extract the addresses of the passed sockaddrs. |
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| 377 | * Do a little sanity checking so as to avoid bad memory references. |
---|
| 378 | * This data is derived straight from userland. |
---|
| 379 | */ |
---|
| 380 | static int |
---|
[1af76095] | 381 | rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) |
---|
[39e6e65a] | 382 | { |
---|
[1af76095] | 383 | struct sockaddr *sa; |
---|
| 384 | int i; |
---|
[39e6e65a] | 385 | |
---|
| 386 | bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); |
---|
[1af76095] | 387 | for (i = 0; i < RTAX_MAX && cp < cplim; i++) { |
---|
[39e6e65a] | 388 | if ((rtinfo->rti_addrs & (1 << i)) == 0) |
---|
| 389 | continue; |
---|
| 390 | sa = (struct sockaddr *)cp; |
---|
| 391 | /* |
---|
| 392 | * It won't fit. |
---|
| 393 | */ |
---|
[1af76095] | 394 | if (cp + sa->sa_len > cplim) |
---|
[39e6e65a] | 395 | return (EINVAL); |
---|
| 396 | /* |
---|
| 397 | * there are no more.. quit now |
---|
| 398 | * If there are more bits, they are in error. |
---|
| 399 | * I've seen this. route(1) can evidently generate these. |
---|
| 400 | * This causes kernel to core dump. |
---|
| 401 | * for compatibility, If we see this, point to a safe address. |
---|
| 402 | */ |
---|
| 403 | if (sa->sa_len == 0) { |
---|
| 404 | rtinfo->rti_info[i] = &sa_zero; |
---|
| 405 | return (0); /* should be EINVAL but for compat */ |
---|
| 406 | } |
---|
| 407 | /* accept it */ |
---|
| 408 | rtinfo->rti_info[i] = sa; |
---|
| 409 | ADVANCE(cp, sa); |
---|
| 410 | } |
---|
| 411 | return (0); |
---|
| 412 | } |
---|
| 413 | |
---|
| 414 | static struct mbuf * |
---|
[1af76095] | 415 | rt_msg1(int type, struct rt_addrinfo *rtinfo) |
---|
[39e6e65a] | 416 | { |
---|
[1af76095] | 417 | struct rt_msghdr *rtm; |
---|
| 418 | struct mbuf *m; |
---|
| 419 | int i; |
---|
| 420 | struct sockaddr *sa; |
---|
[39e6e65a] | 421 | int len, dlen; |
---|
| 422 | |
---|
| 423 | m = m_gethdr(M_DONTWAIT, MT_DATA); |
---|
| 424 | if (m == 0) |
---|
| 425 | return (m); |
---|
| 426 | switch (type) { |
---|
| 427 | |
---|
| 428 | case RTM_DELADDR: |
---|
| 429 | case RTM_NEWADDR: |
---|
| 430 | len = sizeof(struct ifa_msghdr); |
---|
| 431 | break; |
---|
| 432 | |
---|
| 433 | case RTM_IFINFO: |
---|
| 434 | len = sizeof(struct if_msghdr); |
---|
| 435 | break; |
---|
| 436 | |
---|
| 437 | default: |
---|
| 438 | len = sizeof(struct rt_msghdr); |
---|
| 439 | } |
---|
| 440 | if (len > MHLEN) |
---|
| 441 | panic("rt_msg1"); |
---|
| 442 | m->m_pkthdr.len = m->m_len = len; |
---|
[1af76095] | 443 | m->m_pkthdr.rcvif = NULL; |
---|
[39e6e65a] | 444 | rtm = mtod(m, struct rt_msghdr *); |
---|
| 445 | bzero((caddr_t)rtm, len); |
---|
| 446 | for (i = 0; i < RTAX_MAX; i++) { |
---|
| 447 | if ((sa = rtinfo->rti_info[i]) == NULL) |
---|
| 448 | continue; |
---|
| 449 | rtinfo->rti_addrs |= (1 << i); |
---|
| 450 | dlen = ROUNDUP(sa->sa_len); |
---|
| 451 | m_copyback(m, len, dlen, (caddr_t)sa); |
---|
| 452 | len += dlen; |
---|
| 453 | } |
---|
| 454 | if (m->m_pkthdr.len != len) { |
---|
| 455 | m_freem(m); |
---|
| 456 | return (NULL); |
---|
| 457 | } |
---|
| 458 | rtm->rtm_msglen = len; |
---|
| 459 | rtm->rtm_version = RTM_VERSION; |
---|
| 460 | rtm->rtm_type = type; |
---|
| 461 | return (m); |
---|
| 462 | } |
---|
| 463 | |
---|
| 464 | static int |
---|
[1af76095] | 465 | rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w) |
---|
[39e6e65a] | 466 | { |
---|
[1af76095] | 467 | int i; |
---|
[39e6e65a] | 468 | int len, dlen, second_time = 0; |
---|
| 469 | caddr_t cp0; |
---|
| 470 | |
---|
| 471 | rtinfo->rti_addrs = 0; |
---|
| 472 | again: |
---|
| 473 | switch (type) { |
---|
| 474 | |
---|
| 475 | case RTM_DELADDR: |
---|
| 476 | case RTM_NEWADDR: |
---|
| 477 | len = sizeof(struct ifa_msghdr); |
---|
| 478 | break; |
---|
| 479 | |
---|
| 480 | case RTM_IFINFO: |
---|
| 481 | len = sizeof(struct if_msghdr); |
---|
| 482 | break; |
---|
| 483 | |
---|
| 484 | default: |
---|
| 485 | len = sizeof(struct rt_msghdr); |
---|
| 486 | } |
---|
| 487 | cp0 = cp; |
---|
| 488 | if (cp0) |
---|
| 489 | cp += len; |
---|
| 490 | for (i = 0; i < RTAX_MAX; i++) { |
---|
[1af76095] | 491 | struct sockaddr *sa; |
---|
[39e6e65a] | 492 | |
---|
[1af76095] | 493 | if ((sa = rtinfo->rti_info[i]) == NULL) |
---|
[39e6e65a] | 494 | continue; |
---|
| 495 | rtinfo->rti_addrs |= (1 << i); |
---|
| 496 | dlen = ROUNDUP(sa->sa_len); |
---|
| 497 | if (cp) { |
---|
| 498 | bcopy((caddr_t)sa, cp, (unsigned)dlen); |
---|
| 499 | cp += dlen; |
---|
| 500 | } |
---|
| 501 | len += dlen; |
---|
| 502 | } |
---|
[1af76095] | 503 | if (cp == NULL && w != NULL && !second_time) { |
---|
| 504 | struct walkarg *rw = w; |
---|
[39e6e65a] | 505 | |
---|
| 506 | if (rw->w_req) { |
---|
| 507 | if (rw->w_tmemsize < len) { |
---|
| 508 | if (rw->w_tmem) |
---|
| 509 | free(rw->w_tmem, M_RTABLE); |
---|
| 510 | rw->w_tmem = (caddr_t) |
---|
| 511 | malloc(len, M_RTABLE, M_NOWAIT); |
---|
| 512 | if (rw->w_tmem) |
---|
| 513 | rw->w_tmemsize = len; |
---|
| 514 | } |
---|
| 515 | if (rw->w_tmem) { |
---|
| 516 | cp = rw->w_tmem; |
---|
| 517 | second_time = 1; |
---|
| 518 | goto again; |
---|
| 519 | } |
---|
| 520 | } |
---|
| 521 | } |
---|
| 522 | if (cp) { |
---|
[1af76095] | 523 | struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; |
---|
[39e6e65a] | 524 | |
---|
| 525 | rtm->rtm_version = RTM_VERSION; |
---|
| 526 | rtm->rtm_type = type; |
---|
| 527 | rtm->rtm_msglen = len; |
---|
| 528 | } |
---|
| 529 | return (len); |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | /* |
---|
| 533 | * This routine is called to generate a message from the routing |
---|
| 534 | * socket indicating that a redirect has occured, a routing lookup |
---|
| 535 | * has failed, or that a protocol has detected timeouts to a particular |
---|
| 536 | * destination. |
---|
| 537 | */ |
---|
| 538 | void |
---|
[1af76095] | 539 | rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) |
---|
[39e6e65a] | 540 | { |
---|
[1af76095] | 541 | struct rt_msghdr *rtm; |
---|
| 542 | struct mbuf *m; |
---|
[39e6e65a] | 543 | struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; |
---|
| 544 | |
---|
| 545 | if (route_cb.any_count == 0) |
---|
| 546 | return; |
---|
| 547 | m = rt_msg1(type, rtinfo); |
---|
[1af76095] | 548 | if (m == NULL) |
---|
[39e6e65a] | 549 | return; |
---|
| 550 | rtm = mtod(m, struct rt_msghdr *); |
---|
| 551 | rtm->rtm_flags = RTF_DONE | flags; |
---|
| 552 | rtm->rtm_errno = error; |
---|
| 553 | rtm->rtm_addrs = rtinfo->rti_addrs; |
---|
| 554 | route_proto.sp_protocol = sa ? sa->sa_family : 0; |
---|
| 555 | raw_input(m, &route_proto, &route_src, &route_dst); |
---|
| 556 | } |
---|
| 557 | |
---|
| 558 | /* |
---|
| 559 | * This routine is called to generate a message from the routing |
---|
| 560 | * socket indicating that the status of a network interface has changed. |
---|
| 561 | */ |
---|
| 562 | void |
---|
[1af76095] | 563 | rt_ifmsg(struct ifnet *ifp) |
---|
[39e6e65a] | 564 | { |
---|
[1af76095] | 565 | struct if_msghdr *ifm; |
---|
[39e6e65a] | 566 | struct mbuf *m; |
---|
| 567 | struct rt_addrinfo info; |
---|
| 568 | |
---|
| 569 | if (route_cb.any_count == 0) |
---|
| 570 | return; |
---|
| 571 | bzero((caddr_t)&info, sizeof(info)); |
---|
| 572 | m = rt_msg1(RTM_IFINFO, &info); |
---|
[1af76095] | 573 | if (m == NULL) |
---|
[39e6e65a] | 574 | return; |
---|
| 575 | ifm = mtod(m, struct if_msghdr *); |
---|
| 576 | ifm->ifm_index = ifp->if_index; |
---|
[1af76095] | 577 | ifm->ifm_flags = ifp->if_flags; |
---|
[39e6e65a] | 578 | ifm->ifm_data = ifp->if_data; |
---|
| 579 | ifm->ifm_addrs = 0; |
---|
| 580 | route_proto.sp_protocol = 0; |
---|
| 581 | raw_input(m, &route_proto, &route_src, &route_dst); |
---|
| 582 | } |
---|
| 583 | |
---|
| 584 | /* |
---|
| 585 | * This is called to generate messages from the routing socket |
---|
| 586 | * indicating a network interface has had addresses associated with it. |
---|
| 587 | * if we ever reverse the logic and replace messages TO the routing |
---|
| 588 | * socket indicate a request to configure interfaces, then it will |
---|
| 589 | * be unnecessary as the routing socket will automatically generate |
---|
| 590 | * copies of it. |
---|
| 591 | */ |
---|
| 592 | void |
---|
[1af76095] | 593 | rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) |
---|
[39e6e65a] | 594 | { |
---|
| 595 | struct rt_addrinfo info; |
---|
[1af76095] | 596 | struct sockaddr *sa = NULL; |
---|
[39e6e65a] | 597 | int pass; |
---|
[1af76095] | 598 | struct mbuf *m = NULL; |
---|
[39e6e65a] | 599 | struct ifnet *ifp = ifa->ifa_ifp; |
---|
| 600 | |
---|
| 601 | if (route_cb.any_count == 0) |
---|
| 602 | return; |
---|
| 603 | for (pass = 1; pass < 3; pass++) { |
---|
| 604 | bzero((caddr_t)&info, sizeof(info)); |
---|
| 605 | if ((cmd == RTM_ADD && pass == 1) || |
---|
| 606 | (cmd == RTM_DELETE && pass == 2)) { |
---|
[1af76095] | 607 | struct ifa_msghdr *ifam; |
---|
[39e6e65a] | 608 | int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; |
---|
| 609 | |
---|
[1af76095] | 610 | info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; |
---|
| 611 | info.rti_info[RTAX_IFP] = ifp->if_addrlist->ifa_addr; |
---|
| 612 | info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; |
---|
| 613 | info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; |
---|
[39e6e65a] | 614 | if ((m = rt_msg1(ncmd, &info)) == NULL) |
---|
| 615 | continue; |
---|
| 616 | ifam = mtod(m, struct ifa_msghdr *); |
---|
| 617 | ifam->ifam_index = ifp->if_index; |
---|
| 618 | ifam->ifam_metric = ifa->ifa_metric; |
---|
| 619 | ifam->ifam_flags = ifa->ifa_flags; |
---|
| 620 | ifam->ifam_addrs = info.rti_addrs; |
---|
| 621 | } |
---|
| 622 | if ((cmd == RTM_ADD && pass == 2) || |
---|
| 623 | (cmd == RTM_DELETE && pass == 1)) { |
---|
[1af76095] | 624 | struct rt_msghdr *rtm; |
---|
[39e6e65a] | 625 | |
---|
[1af76095] | 626 | if (rt == NULL) |
---|
[39e6e65a] | 627 | continue; |
---|
[1af76095] | 628 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
---|
| 629 | info.rti_info[RTAX_DST] = sa = rt_key(rt); |
---|
| 630 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
---|
[39e6e65a] | 631 | if ((m = rt_msg1(cmd, &info)) == NULL) |
---|
| 632 | continue; |
---|
| 633 | rtm = mtod(m, struct rt_msghdr *); |
---|
| 634 | rtm->rtm_index = ifp->if_index; |
---|
| 635 | rtm->rtm_flags |= rt->rt_flags; |
---|
| 636 | rtm->rtm_errno = error; |
---|
| 637 | rtm->rtm_addrs = info.rti_addrs; |
---|
| 638 | } |
---|
| 639 | route_proto.sp_protocol = sa ? sa->sa_family : 0; |
---|
| 640 | raw_input(m, &route_proto, &route_src, &route_dst); |
---|
| 641 | } |
---|
| 642 | } |
---|
| 643 | |
---|
| 644 | |
---|
| 645 | /* |
---|
| 646 | * This is used in dumping the kernel table via sysctl(). |
---|
| 647 | */ |
---|
| 648 | int |
---|
[1af76095] | 649 | sysctl_dumpentry(struct radix_node *rn, void *vw) |
---|
[39e6e65a] | 650 | { |
---|
[1af76095] | 651 | struct walkarg *w = vw; |
---|
| 652 | struct rtentry *rt = (struct rtentry *)rn; |
---|
[39e6e65a] | 653 | int error = 0, size; |
---|
| 654 | struct rt_addrinfo info; |
---|
| 655 | |
---|
| 656 | if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) |
---|
| 657 | return 0; |
---|
| 658 | bzero((caddr_t)&info, sizeof(info)); |
---|
[1af76095] | 659 | info.rti_info[RTAX_DST] = rt_key(rt); |
---|
| 660 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
---|
| 661 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
---|
| 662 | info.rti_info[RTAX_GENMASK] = rt->rt_genmask; |
---|
| 663 | size = rt_msg2(RTM_GET, &info, NULL, w); |
---|
[39e6e65a] | 664 | if (w->w_req && w->w_tmem) { |
---|
[1af76095] | 665 | struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; |
---|
[39e6e65a] | 666 | |
---|
| 667 | rtm->rtm_flags = rt->rt_flags; |
---|
| 668 | rtm->rtm_use = rt->rt_use; |
---|
| 669 | rtm->rtm_rmx = rt->rt_rmx; |
---|
| 670 | rtm->rtm_index = rt->rt_ifp->if_index; |
---|
| 671 | rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; |
---|
| 672 | rtm->rtm_addrs = info.rti_addrs; |
---|
[f8397280] | 673 | error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); |
---|
[39e6e65a] | 674 | return (error); |
---|
| 675 | } |
---|
| 676 | return (error); |
---|
| 677 | } |
---|
| 678 | |
---|
| 679 | int |
---|
[1af76095] | 680 | sysctl_iflist(int af, struct walkarg *w) |
---|
[39e6e65a] | 681 | { |
---|
[1af76095] | 682 | struct ifnet *ifp; |
---|
| 683 | struct ifaddr *ifa; |
---|
[39e6e65a] | 684 | struct rt_addrinfo info; |
---|
| 685 | int len, error = 0; |
---|
| 686 | |
---|
| 687 | bzero((caddr_t)&info, sizeof(info)); |
---|
| 688 | for (ifp = ifnet; ifp; ifp = ifp->if_next) { |
---|
| 689 | if (w->w_arg && w->w_arg != ifp->if_index) |
---|
| 690 | continue; |
---|
| 691 | ifa = ifp->if_addrlist; |
---|
[1af76095] | 692 | info.rti_info[RTAX_IFP] = ifa->ifa_addr; |
---|
[39e6e65a] | 693 | len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); |
---|
[1af76095] | 694 | info.rti_info[RTAX_IFP] = 0; |
---|
[39e6e65a] | 695 | if (w->w_req && w->w_tmem) { |
---|
[1af76095] | 696 | struct if_msghdr *ifm; |
---|
[39e6e65a] | 697 | |
---|
| 698 | ifm = (struct if_msghdr *)w->w_tmem; |
---|
| 699 | ifm->ifm_index = ifp->if_index; |
---|
[1af76095] | 700 | ifm->ifm_flags = ifp->if_flags; |
---|
[39e6e65a] | 701 | ifm->ifm_data = ifp->if_data; |
---|
| 702 | ifm->ifm_addrs = info.rti_addrs; |
---|
[36799d4] | 703 | error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); |
---|
[39e6e65a] | 704 | if (error) |
---|
| 705 | return (error); |
---|
| 706 | } |
---|
| 707 | while ((ifa = ifa->ifa_next) != 0) { |
---|
| 708 | if (af && af != ifa->ifa_addr->sa_family) |
---|
| 709 | continue; |
---|
[1af76095] | 710 | info.rti_info[RTAX_IFA] = ifa->ifa_addr; |
---|
| 711 | info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; |
---|
| 712 | info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; |
---|
| 713 | len = rt_msg2(RTM_NEWADDR, &info, NULL, w); |
---|
[39e6e65a] | 714 | if (w->w_req && w->w_tmem) { |
---|
[1af76095] | 715 | struct ifa_msghdr *ifam; |
---|
[39e6e65a] | 716 | |
---|
| 717 | ifam = (struct ifa_msghdr *)w->w_tmem; |
---|
| 718 | ifam->ifam_index = ifa->ifa_ifp->if_index; |
---|
| 719 | ifam->ifam_flags = ifa->ifa_flags; |
---|
| 720 | ifam->ifam_metric = ifa->ifa_metric; |
---|
| 721 | ifam->ifam_addrs = info.rti_addrs; |
---|
[36799d4] | 722 | error = SYSCTL_OUT(w->w_req, w->w_tmem, len); |
---|
[39e6e65a] | 723 | if (error) |
---|
| 724 | return (error); |
---|
| 725 | } |
---|
| 726 | } |
---|
[1af76095] | 727 | info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = info.rti_info[RTAX_BRD] = 0; |
---|
[39e6e65a] | 728 | } |
---|
| 729 | return (0); |
---|
| 730 | } |
---|
| 731 | |
---|
| 732 | static int |
---|
[36799d4] | 733 | sysctl_rtsock(SYSCTL_HANDLER_ARGS) |
---|
[39e6e65a] | 734 | { |
---|
| 735 | int *name = (int *)arg1; |
---|
| 736 | u_int namelen = arg2; |
---|
[1af76095] | 737 | struct radix_node_head *rnh; |
---|
[39e6e65a] | 738 | int i, s, error = EINVAL; |
---|
| 739 | u_char af; |
---|
| 740 | struct walkarg w; |
---|
| 741 | |
---|
| 742 | name ++; |
---|
| 743 | namelen--; |
---|
| 744 | if (req->newptr) |
---|
| 745 | return (EPERM); |
---|
| 746 | if (namelen != 3) |
---|
| 747 | return (EINVAL); |
---|
| 748 | af = name[0]; |
---|
| 749 | Bzero(&w, sizeof(w)); |
---|
| 750 | w.w_op = name[1]; |
---|
| 751 | w.w_arg = name[2]; |
---|
| 752 | w.w_req = req; |
---|
| 753 | |
---|
| 754 | s = splnet(); |
---|
| 755 | switch (w.w_op) { |
---|
| 756 | |
---|
| 757 | case NET_RT_DUMP: |
---|
| 758 | case NET_RT_FLAGS: |
---|
| 759 | for (i = 1; i <= AF_MAX; i++) |
---|
| 760 | if ((rnh = rt_tables[i]) && (af == 0 || af == i) && |
---|
| 761 | (error = rnh->rnh_walktree(rnh, |
---|
| 762 | sysctl_dumpentry, &w))) |
---|
| 763 | break; |
---|
| 764 | break; |
---|
| 765 | |
---|
| 766 | case NET_RT_IFLIST: |
---|
| 767 | error = sysctl_iflist(af, &w); |
---|
| 768 | } |
---|
| 769 | splx(s); |
---|
| 770 | if (w.w_tmem) |
---|
| 771 | free(w.w_tmem, M_RTABLE); |
---|
| 772 | return (error); |
---|
| 773 | } |
---|
| 774 | |
---|
| 775 | SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock,""); |
---|
| 776 | |
---|
| 777 | /* |
---|
| 778 | * Definitions of protocols supported in the ROUTE domain. |
---|
| 779 | */ |
---|
| 780 | |
---|
| 781 | extern struct domain routedomain; /* or at least forward */ |
---|
| 782 | |
---|
| 783 | static struct protosw routesw[] = { |
---|
| 784 | { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, |
---|
| 785 | 0, route_output, raw_ctlinput, 0, |
---|
| 786 | route_usrreq, |
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[300c071c] | 787 | raw_init, NULL, NULL, NULL, |
---|
| 788 | NULL |
---|
[39e6e65a] | 789 | } |
---|
| 790 | }; |
---|
| 791 | |
---|
| 792 | struct domain routedomain = |
---|
| 793 | { PF_ROUTE, "route", route_init, 0, 0, |
---|
[300c071c] | 794 | routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])], |
---|
| 795 | NULL, NULL, 0, 0 }; |
---|
[39e6e65a] | 796 | |
---|
| 797 | DOMAIN_SET(route); |
---|