While <sys/sysctl.h> includes <sys/queue.h> unconditionally, it is only actually used in code which is conditional on _KERNEL. Make the #include itself conditional as well, and fix userland code that uses <sys/queue.h> for other purposes but relied on <sys/sysctl.h> to bring it in. MFC after: 1 week
3583 lines
90 KiB
C
3583 lines
90 KiB
C
/* $FreeBSD$ */
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/* $KAME: route6d.c,v 1.104 2003/10/31 00:30:20 itojun Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* 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 project 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 PROJECT 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 PROJECT 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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#ifndef lint
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static const char _rcsid[] = "$KAME: route6d.c,v 1.104 2003/10/31 00:30:20 itojun Exp $";
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#endif
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/ip6.h>
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#include <netinet/udp.h>
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#include <err.h>
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#include <errno.h>
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#include <fnmatch.h>
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#include <ifaddrs.h>
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#include <netdb.h>
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#ifdef HAVE_POLL_H
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#include <poll.h>
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#endif
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#include <signal.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <unistd.h>
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#include "route6d.h"
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#define MAXFILTER 40
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#define RT_DUMP_MAXRETRY 15
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#ifdef DEBUG
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#define INIT_INTERVAL6 6
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#else
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#define INIT_INTERVAL6 10 /* Wait to submit an initial riprequest */
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#endif
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/* alignment constraint for routing socket */
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#define ROUNDUP(a) \
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((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
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#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
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struct ifc { /* Configuration of an interface */
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TAILQ_ENTRY(ifc) ifc_next;
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char ifc_name[IFNAMSIZ]; /* if name */
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int ifc_index; /* if index */
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int ifc_mtu; /* if mtu */
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int ifc_metric; /* if metric */
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u_int ifc_flags; /* flags */
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short ifc_cflags; /* IFC_XXX */
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struct in6_addr ifc_mylladdr; /* my link-local address */
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struct sockaddr_in6 ifc_ripsin; /* rip multicast address */
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TAILQ_HEAD(, ifac) ifc_ifac_head; /* list of AF_INET6 addrs */
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TAILQ_HEAD(, iff) ifc_iff_head; /* list of filters */
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int ifc_joined; /* joined to ff02::9 */
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};
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static TAILQ_HEAD(, ifc) ifc_head = TAILQ_HEAD_INITIALIZER(ifc_head);
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struct ifac { /* Adddress associated to an interface */
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TAILQ_ENTRY(ifac) ifac_next;
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struct ifc *ifac_ifc; /* back pointer */
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struct in6_addr ifac_addr; /* address */
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struct in6_addr ifac_raddr; /* remote address, valid in p2p */
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int ifac_scope_id; /* scope id */
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int ifac_plen; /* prefix length */
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};
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struct iff { /* Filters for an interface */
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TAILQ_ENTRY(iff) iff_next;
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int iff_type;
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struct in6_addr iff_addr;
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int iff_plen;
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};
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static struct ifc **index2ifc;
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static unsigned int nindex2ifc;
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static struct ifc *loopifcp = NULL; /* pointing to loopback */
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#ifdef HAVE_POLL_H
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static struct pollfd set[2];
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#else
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static fd_set *sockvecp; /* vector to select() for receiving */
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static fd_set *recvecp;
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static int fdmasks;
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static int maxfd; /* maximum fd for select() */
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#endif
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static int rtsock; /* the routing socket */
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static int ripsock; /* socket to send/receive RIP datagram */
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static struct rip6 *ripbuf; /* packet buffer for sending */
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/*
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* Maintain the routes in a linked list. When the number of the routes
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* grows, somebody would like to introduce a hash based or a radix tree
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* based structure. I believe the number of routes handled by RIP is
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* limited and I don't have to manage a complex data structure, however.
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*
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* One of the major drawbacks of the linear linked list is the difficulty
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* of representing the relationship between a couple of routes. This may
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* be a significant problem when we have to support route aggregation with
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* suppressing the specifics covered by the aggregate.
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*/
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struct riprt {
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TAILQ_ENTRY(riprt) rrt_next; /* next destination */
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struct riprt *rrt_same; /* same destination - future use */
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struct netinfo6 rrt_info; /* network info */
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struct in6_addr rrt_gw; /* gateway */
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u_long rrt_flags; /* kernel routing table flags */
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u_long rrt_rflags; /* route6d routing table flags */
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time_t rrt_t; /* when the route validated */
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int rrt_index; /* ifindex from which this route got */
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};
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static TAILQ_HEAD(, riprt) riprt_head = TAILQ_HEAD_INITIALIZER(riprt_head);
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static int dflag = 0; /* debug flag */
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static int qflag = 0; /* quiet flag */
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static int nflag = 0; /* don't update kernel routing table */
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static int aflag = 0; /* age out even the statically defined routes */
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static int hflag = 0; /* don't split horizon */
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static int lflag = 0; /* exchange site local routes */
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static int Pflag = 0; /* don't age out routes with RTF_PROTO[123] */
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static int Qflag = RTF_PROTO2; /* set RTF_PROTO[123] flag to routes by RIPng */
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static int sflag = 0; /* announce static routes w/ split horizon */
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static int Sflag = 0; /* announce static routes to every interface */
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static unsigned long routetag = 0; /* route tag attached on originating case */
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static char *filter[MAXFILTER];
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static int filtertype[MAXFILTER];
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static int nfilter = 0;
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static pid_t pid;
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static struct sockaddr_storage ripsin;
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static int interval = 1;
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static time_t nextalarm = 0;
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#if 0
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static time_t sup_trig_update = 0;
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#endif
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static FILE *rtlog = NULL;
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static int logopened = 0;
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static int seq = 0;
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static volatile sig_atomic_t seenalrm;
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static volatile sig_atomic_t seenquit;
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static volatile sig_atomic_t seenusr1;
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#define RRTF_AGGREGATE 0x08000000
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#define RRTF_NOADVERTISE 0x10000000
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#define RRTF_NH_NOT_LLADDR 0x20000000
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#define RRTF_SENDANYWAY 0x40000000
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#define RRTF_CHANGED 0x80000000
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static void sighandler(int);
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static void ripalarm(void);
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static void riprecv(void);
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static void ripsend(struct ifc *, struct sockaddr_in6 *, int);
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static int out_filter(struct riprt *, struct ifc *);
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static void init(void);
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static void ifconfig(void);
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static int ifconfig1(const char *, const struct sockaddr *, struct ifc *, int);
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static void rtrecv(void);
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static int rt_del(const struct sockaddr_in6 *, const struct sockaddr_in6 *,
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const struct sockaddr_in6 *);
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static int rt_deladdr(struct ifc *, const struct sockaddr_in6 *,
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const struct sockaddr_in6 *);
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static void filterconfig(void);
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static int getifmtu(int);
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static const char *rttypes(struct rt_msghdr *);
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static const char *rtflags(struct rt_msghdr *);
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static const char *ifflags(int);
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static int ifrt(struct ifc *, int);
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static void ifrt_p2p(struct ifc *, int);
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static void applyplen(struct in6_addr *, int);
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static void ifrtdump(int);
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static void ifdump(int);
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static void ifdump0(FILE *, const struct ifc *);
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static void ifremove(int);
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static void rtdump(int);
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static void rt_entry(struct rt_msghdr *, int);
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static void rtdexit(void);
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static void riprequest(struct ifc *, struct netinfo6 *, int,
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struct sockaddr_in6 *);
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static void ripflush(struct ifc *, struct sockaddr_in6 *, int, struct netinfo6 *np);
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static void sendrequest(struct ifc *);
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static int sin6mask2len(const struct sockaddr_in6 *);
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static int mask2len(const struct in6_addr *, int);
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static int sendpacket(struct sockaddr_in6 *, int);
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static int addroute(struct riprt *, const struct in6_addr *, struct ifc *);
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static int delroute(struct netinfo6 *, struct in6_addr *);
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#if 0
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static struct in6_addr *getroute(struct netinfo6 *, struct in6_addr *);
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#endif
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static void krtread(int);
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static int tobeadv(struct riprt *, struct ifc *);
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static char *allocopy(char *);
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static char *hms(void);
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static const char *inet6_n2p(const struct in6_addr *);
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static struct ifac *ifa_match(const struct ifc *, const struct in6_addr *, int);
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static struct in6_addr *plen2mask(int);
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static struct riprt *rtsearch(struct netinfo6 *);
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static int ripinterval(int);
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#if 0
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static time_t ripsuptrig(void);
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#endif
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static void fatal(const char *, ...)
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__attribute__((__format__(__printf__, 1, 2)));
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static void trace(int, const char *, ...)
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__attribute__((__format__(__printf__, 2, 3)));
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static void tracet(int, const char *, ...)
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__attribute__((__format__(__printf__, 2, 3)));
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static struct ifc *ifc_find(char *);
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static struct iff *iff_find(struct ifc *, int);
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static void setindex2ifc(int, struct ifc *);
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#define MALLOC(type) ((type *)malloc(sizeof(type)))
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#define IFIL_TYPE_ANY 0x0
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#define IFIL_TYPE_A 'A'
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#define IFIL_TYPE_N 'N'
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#define IFIL_TYPE_T 'T'
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#define IFIL_TYPE_O 'O'
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#define IFIL_TYPE_L 'L'
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int
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main(int argc, char *argv[])
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{
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int ch;
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int error = 0;
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unsigned long proto;
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struct ifc *ifcp;
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sigset_t mask, omask;
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const char *pidfile = ROUTE6D_PID;
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FILE *pidfh;
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char *progname;
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char *ep;
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progname = strrchr(*argv, '/');
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if (progname)
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progname++;
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else
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progname = *argv;
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pid = getpid();
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while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnp:P:Q:qsS")) != -1) {
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switch (ch) {
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case 'A':
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case 'N':
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case 'O':
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case 'T':
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case 'L':
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if (nfilter >= MAXFILTER) {
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fatal("Exceeds MAXFILTER");
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/*NOTREACHED*/
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}
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filtertype[nfilter] = ch;
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filter[nfilter++] = allocopy(optarg);
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break;
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case 't':
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ep = NULL;
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routetag = strtoul(optarg, &ep, 0);
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if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) {
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fatal("invalid route tag");
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/*NOTREACHED*/
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}
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break;
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case 'p':
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pidfile = optarg;
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break;
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case 'P':
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ep = NULL;
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proto = strtoul(optarg, &ep, 0);
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if (!ep || *ep != '\0' || 3 < proto) {
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fatal("invalid P flag");
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/*NOTREACHED*/
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}
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if (proto == 0)
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Pflag = 0;
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if (proto == 1)
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Pflag |= RTF_PROTO1;
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if (proto == 2)
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Pflag |= RTF_PROTO2;
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if (proto == 3)
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Pflag |= RTF_PROTO3;
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break;
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case 'Q':
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ep = NULL;
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proto = strtoul(optarg, &ep, 0);
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if (!ep || *ep != '\0' || 3 < proto) {
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fatal("invalid Q flag");
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/*NOTREACHED*/
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}
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if (proto == 0)
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Qflag = 0;
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if (proto == 1)
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Qflag |= RTF_PROTO1;
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if (proto == 2)
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Qflag |= RTF_PROTO2;
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if (proto == 3)
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Qflag |= RTF_PROTO3;
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break;
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case 'R':
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if ((rtlog = fopen(optarg, "w")) == NULL) {
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fatal("Can not write to routelog");
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/*NOTREACHED*/
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}
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break;
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#define FLAG(c, flag, n) case c: do { flag = n; break; } while(0)
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FLAG('a', aflag, 1); break;
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FLAG('d', dflag, 1); break;
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FLAG('D', dflag, 2); break;
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FLAG('h', hflag, 1); break;
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FLAG('l', lflag, 1); break;
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FLAG('n', nflag, 1); break;
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FLAG('q', qflag, 1); break;
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FLAG('s', sflag, 1); break;
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FLAG('S', Sflag, 1); break;
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#undef FLAG
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default:
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fatal("Invalid option specified, terminating");
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/*NOTREACHED*/
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}
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}
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argc -= optind;
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argv += optind;
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if (argc > 0) {
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fatal("bogus extra arguments");
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/*NOTREACHED*/
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}
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|
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if (geteuid()) {
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nflag = 1;
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fprintf(stderr, "No kernel update is allowed\n");
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}
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|
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if (dflag == 0) {
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if (daemon(0, 0) < 0) {
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fatal("daemon");
|
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/*NOTREACHED*/
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}
|
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}
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|
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openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON);
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logopened++;
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if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL)
|
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fatal("malloc");
|
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memset(ripbuf, 0, RIP6_MAXMTU);
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ripbuf->rip6_cmd = RIP6_RESPONSE;
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ripbuf->rip6_vers = RIP6_VERSION;
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ripbuf->rip6_res1[0] = 0;
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ripbuf->rip6_res1[1] = 0;
|
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|
|
init();
|
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ifconfig();
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
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if (ifcp->ifc_index < 0) {
|
|
fprintf(stderr, "No ifindex found at %s "
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|
"(no link-local address?)\n", ifcp->ifc_name);
|
|
error++;
|
|
}
|
|
}
|
|
if (error)
|
|
exit(1);
|
|
if (loopifcp == NULL) {
|
|
fatal("No loopback found");
|
|
/*NOTREACHED*/
|
|
}
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
ifrt(ifcp, 0);
|
|
}
|
|
filterconfig();
|
|
krtread(0);
|
|
if (dflag)
|
|
ifrtdump(0);
|
|
|
|
pid = getpid();
|
|
if ((pidfh = fopen(pidfile, "w")) != NULL) {
|
|
fprintf(pidfh, "%d\n", pid);
|
|
fclose(pidfh);
|
|
}
|
|
|
|
if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) {
|
|
fatal("malloc");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(ripbuf, 0, RIP6_MAXMTU);
|
|
ripbuf->rip6_cmd = RIP6_RESPONSE;
|
|
ripbuf->rip6_vers = RIP6_VERSION;
|
|
ripbuf->rip6_res1[0] = 0;
|
|
ripbuf->rip6_res1[1] = 0;
|
|
|
|
if (signal(SIGALRM, sighandler) == SIG_ERR ||
|
|
signal(SIGQUIT, sighandler) == SIG_ERR ||
|
|
signal(SIGTERM, sighandler) == SIG_ERR ||
|
|
signal(SIGUSR1, sighandler) == SIG_ERR ||
|
|
signal(SIGHUP, sighandler) == SIG_ERR ||
|
|
signal(SIGINT, sighandler) == SIG_ERR) {
|
|
fatal("signal");
|
|
/*NOTREACHED*/
|
|
}
|
|
/*
|
|
* To avoid rip packet congestion (not on a cable but in this
|
|
* process), wait for a moment to send the first RIP6_RESPONSE
|
|
* packets.
|
|
*/
|
|
alarm(ripinterval(INIT_INTERVAL6));
|
|
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
|
|
continue;
|
|
if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP))
|
|
sendrequest(ifcp);
|
|
}
|
|
|
|
syslog(LOG_INFO, "**** Started ****");
|
|
sigemptyset(&mask);
|
|
sigaddset(&mask, SIGALRM);
|
|
while (1) {
|
|
if (seenalrm) {
|
|
ripalarm();
|
|
seenalrm = 0;
|
|
continue;
|
|
}
|
|
if (seenquit) {
|
|
rtdexit();
|
|
seenquit = 0;
|
|
continue;
|
|
}
|
|
if (seenusr1) {
|
|
ifrtdump(SIGUSR1);
|
|
seenusr1 = 0;
|
|
continue;
|
|
}
|
|
|
|
#ifdef HAVE_POLL_H
|
|
switch (poll(set, 2, INFTIM))
|
|
#else
|
|
memcpy(recvecp, sockvecp, fdmasks);
|
|
switch (select(maxfd + 1, recvecp, 0, 0, 0))
|
|
#endif
|
|
{
|
|
case -1:
|
|
if (errno != EINTR) {
|
|
fatal("select");
|
|
/*NOTREACHED*/
|
|
}
|
|
continue;
|
|
case 0:
|
|
continue;
|
|
default:
|
|
#ifdef HAVE_POLL_H
|
|
if (set[0].revents & POLLIN)
|
|
#else
|
|
if (FD_ISSET(ripsock, recvecp))
|
|
#endif
|
|
{
|
|
sigprocmask(SIG_BLOCK, &mask, &omask);
|
|
riprecv();
|
|
sigprocmask(SIG_SETMASK, &omask, NULL);
|
|
}
|
|
#ifdef HAVE_POLL_H
|
|
if (set[1].revents & POLLIN)
|
|
#else
|
|
if (FD_ISSET(rtsock, recvecp))
|
|
#endif
|
|
{
|
|
sigprocmask(SIG_BLOCK, &mask, &omask);
|
|
rtrecv();
|
|
sigprocmask(SIG_SETMASK, &omask, NULL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
sighandler(int signo)
|
|
{
|
|
|
|
switch (signo) {
|
|
case SIGALRM:
|
|
seenalrm++;
|
|
break;
|
|
case SIGQUIT:
|
|
case SIGTERM:
|
|
seenquit++;
|
|
break;
|
|
case SIGUSR1:
|
|
case SIGHUP:
|
|
case SIGINT:
|
|
seenusr1++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* gracefully exits after resetting sockopts.
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
rtdexit(void)
|
|
{
|
|
struct riprt *rrt;
|
|
|
|
alarm(0);
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
if (rrt->rrt_rflags & RRTF_AGGREGATE) {
|
|
delroute(&rrt->rrt_info, &rrt->rrt_gw);
|
|
}
|
|
}
|
|
close(ripsock);
|
|
close(rtsock);
|
|
syslog(LOG_INFO, "**** Terminated ****");
|
|
closelog();
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Called periodically:
|
|
* 1. age out the learned route. remove it if necessary.
|
|
* 2. submit RIP6_RESPONSE packets.
|
|
* Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have
|
|
* to invoke this function in every 1 or 5 or 10 seconds only to age the
|
|
* routes more precisely.
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
ripalarm(void)
|
|
{
|
|
struct ifc *ifcp;
|
|
struct riprt *rrt, *rrt_tmp;
|
|
time_t t_lifetime, t_holddown;
|
|
|
|
/* age the RIP routes */
|
|
t_lifetime = time(NULL) - RIP_LIFETIME;
|
|
t_holddown = t_lifetime - RIP_HOLDDOWN;
|
|
TAILQ_FOREACH_SAFE(rrt, &riprt_head, rrt_next, rrt_tmp) {
|
|
if (rrt->rrt_t == 0)
|
|
continue;
|
|
else if (rrt->rrt_t < t_holddown) {
|
|
TAILQ_REMOVE(&riprt_head, rrt, rrt_next);
|
|
delroute(&rrt->rrt_info, &rrt->rrt_gw);
|
|
free(rrt);
|
|
} else if (rrt->rrt_t < t_lifetime)
|
|
rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
|
|
}
|
|
/* Supply updates */
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP))
|
|
ripsend(ifcp, &ifcp->ifc_ripsin, 0);
|
|
}
|
|
alarm(ripinterval(SUPPLY_INTERVAL6));
|
|
}
|
|
|
|
static void
|
|
init(void)
|
|
{
|
|
int error;
|
|
const int int0 = 0, int1 = 1, int255 = 255;
|
|
struct addrinfo hints, *res;
|
|
char port[NI_MAXSERV];
|
|
|
|
TAILQ_INIT(&ifc_head);
|
|
nindex2ifc = 0; /*initial guess*/
|
|
index2ifc = NULL;
|
|
snprintf(port, sizeof(port), "%u", RIP6_PORT);
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_INET6;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
hints.ai_flags = AI_PASSIVE;
|
|
error = getaddrinfo(NULL, port, &hints, &res);
|
|
if (error) {
|
|
fatal("%s", gai_strerror(error));
|
|
/*NOTREACHED*/
|
|
}
|
|
if (res->ai_next) {
|
|
fatal(":: resolved to multiple address");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
|
|
if (ripsock < 0) {
|
|
fatal("rip socket");
|
|
/*NOTREACHED*/
|
|
}
|
|
#ifdef IPV6_V6ONLY
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_V6ONLY,
|
|
&int1, sizeof(int1)) < 0) {
|
|
fatal("rip IPV6_V6ONLY");
|
|
/*NOTREACHED*/
|
|
}
|
|
#endif
|
|
if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) {
|
|
fatal("rip bind");
|
|
/*NOTREACHED*/
|
|
}
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
|
|
&int255, sizeof(int255)) < 0) {
|
|
fatal("rip IPV6_MULTICAST_HOPS");
|
|
/*NOTREACHED*/
|
|
}
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
|
|
&int0, sizeof(int0)) < 0) {
|
|
fatal("rip IPV6_MULTICAST_LOOP");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
#ifdef IPV6_RECVPKTINFO
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVPKTINFO,
|
|
&int1, sizeof(int1)) < 0) {
|
|
fatal("rip IPV6_RECVPKTINFO");
|
|
/*NOTREACHED*/
|
|
}
|
|
#else /* old adv. API */
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO,
|
|
&int1, sizeof(int1)) < 0) {
|
|
fatal("rip IPV6_PKTINFO");
|
|
/*NOTREACHED*/
|
|
}
|
|
#endif
|
|
|
|
#ifdef IPV6_RECVPKTINFO
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
|
|
&int1, sizeof(int1)) < 0) {
|
|
fatal("rip IPV6_RECVHOPLIMIT");
|
|
/*NOTREACHED*/
|
|
}
|
|
#else /* old adv. API */
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_HOPLIMIT,
|
|
&int1, sizeof(int1)) < 0) {
|
|
fatal("rip IPV6_HOPLIMIT");
|
|
/*NOTREACHED*/
|
|
}
|
|
#endif
|
|
freeaddrinfo(res);
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_INET6;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
error = getaddrinfo(RIP6_DEST, port, &hints, &res);
|
|
if (error) {
|
|
fatal("%s", gai_strerror(error));
|
|
/*NOTREACHED*/
|
|
}
|
|
if (res->ai_next) {
|
|
fatal("%s resolved to multiple address", RIP6_DEST);
|
|
/*NOTREACHED*/
|
|
}
|
|
memcpy(&ripsin, res->ai_addr, res->ai_addrlen);
|
|
freeaddrinfo(res);
|
|
|
|
#ifdef HAVE_POLL_H
|
|
set[0].fd = ripsock;
|
|
set[0].events = POLLIN;
|
|
#else
|
|
maxfd = ripsock;
|
|
#endif
|
|
|
|
if (nflag == 0) {
|
|
if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
|
|
fatal("route socket");
|
|
/*NOTREACHED*/
|
|
}
|
|
#ifdef HAVE_POLL_H
|
|
set[1].fd = rtsock;
|
|
set[1].events = POLLIN;
|
|
#else
|
|
if (rtsock > maxfd)
|
|
maxfd = rtsock;
|
|
#endif
|
|
} else {
|
|
#ifdef HAVE_POLL_H
|
|
set[1].fd = -1;
|
|
#else
|
|
rtsock = -1; /*just for safety */
|
|
#endif
|
|
}
|
|
|
|
#ifndef HAVE_POLL_H
|
|
fdmasks = howmany(maxfd + 1, NFDBITS) * sizeof(fd_mask);
|
|
if ((sockvecp = malloc(fdmasks)) == NULL) {
|
|
fatal("malloc");
|
|
/*NOTREACHED*/
|
|
}
|
|
if ((recvecp = malloc(fdmasks)) == NULL) {
|
|
fatal("malloc");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(sockvecp, 0, fdmasks);
|
|
FD_SET(ripsock, sockvecp);
|
|
if (rtsock >= 0)
|
|
FD_SET(rtsock, sockvecp);
|
|
#endif
|
|
}
|
|
|
|
#define RIPSIZE(n) \
|
|
(sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6))
|
|
|
|
/*
|
|
* ripflush flushes the rip datagram stored in the rip buffer
|
|
*/
|
|
static void
|
|
ripflush(struct ifc *ifcp, struct sockaddr_in6 *sin6, int nrt, struct netinfo6 *np)
|
|
{
|
|
int i;
|
|
int error;
|
|
|
|
if (ifcp)
|
|
tracet(1, "Send(%s): info(%d) to %s.%d\n",
|
|
ifcp->ifc_name, nrt,
|
|
inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port));
|
|
else
|
|
tracet(1, "Send: info(%d) to %s.%d\n",
|
|
nrt, inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port));
|
|
if (dflag >= 2) {
|
|
np = ripbuf->rip6_nets;
|
|
for (i = 0; i < nrt; i++, np++) {
|
|
if (np->rip6_metric == NEXTHOP_METRIC) {
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest))
|
|
trace(2, " NextHop reset");
|
|
else {
|
|
trace(2, " NextHop %s",
|
|
inet6_n2p(&np->rip6_dest));
|
|
}
|
|
} else {
|
|
trace(2, " %s/%d[%d]",
|
|
inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, np->rip6_metric);
|
|
}
|
|
if (np->rip6_tag) {
|
|
trace(2, " tag=0x%04x",
|
|
ntohs(np->rip6_tag) & 0xffff);
|
|
}
|
|
trace(2, "\n");
|
|
}
|
|
}
|
|
error = sendpacket(sin6, RIPSIZE(nrt));
|
|
if (error == EAFNOSUPPORT) {
|
|
/* Protocol not supported */
|
|
if (ifcp != NULL) {
|
|
tracet(1, "Could not send info to %s (%s): "
|
|
"set IFF_UP to 0\n",
|
|
ifcp->ifc_name,
|
|
inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
|
|
/* As if down for AF_INET6 */
|
|
ifcp->ifc_flags &= ~IFF_UP;
|
|
} else {
|
|
tracet(1, "Could not send info to %s\n",
|
|
inet6_n2p(&sin6->sin6_addr));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Generate RIP6_RESPONSE packets and send them.
|
|
*/
|
|
static void
|
|
ripsend(struct ifc *ifcp, struct sockaddr_in6 *sin6, int flag)
|
|
{
|
|
struct riprt *rrt;
|
|
struct in6_addr *nh; /* next hop */
|
|
struct netinfo6 *np;
|
|
int maxrte;
|
|
int nrt;
|
|
|
|
if (qflag)
|
|
return;
|
|
|
|
if (ifcp == NULL) {
|
|
/*
|
|
* Request from non-link local address is not
|
|
* a regular route6d update.
|
|
*/
|
|
maxrte = (IFMINMTU - sizeof(struct ip6_hdr) -
|
|
sizeof(struct udphdr) -
|
|
sizeof(struct rip6) + sizeof(struct netinfo6)) /
|
|
sizeof(struct netinfo6);
|
|
nh = NULL;
|
|
nrt = 0;
|
|
np = ripbuf->rip6_nets;
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
if (rrt->rrt_rflags & RRTF_NOADVERTISE)
|
|
continue;
|
|
/* Put the route to the buffer */
|
|
*np = rrt->rrt_info;
|
|
np++; nrt++;
|
|
if (nrt == maxrte) {
|
|
ripflush(NULL, sin6, nrt, np);
|
|
nh = NULL;
|
|
nrt = 0;
|
|
np = ripbuf->rip6_nets;
|
|
}
|
|
}
|
|
if (nrt) /* Send last packet */
|
|
ripflush(NULL, sin6, nrt, np);
|
|
return;
|
|
}
|
|
|
|
if ((flag & RRTF_SENDANYWAY) == 0 &&
|
|
(qflag || (ifcp->ifc_flags & IFF_LOOPBACK)))
|
|
return;
|
|
|
|
/* -N: no use */
|
|
if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
|
|
return;
|
|
|
|
/* -T: generate default route only */
|
|
if (iff_find(ifcp, IFIL_TYPE_T) != NULL) {
|
|
struct netinfo6 rrt_info;
|
|
memset(&rrt_info, 0, sizeof(struct netinfo6));
|
|
rrt_info.rip6_dest = in6addr_any;
|
|
rrt_info.rip6_plen = 0;
|
|
rrt_info.rip6_metric = 1;
|
|
rrt_info.rip6_metric += ifcp->ifc_metric;
|
|
rrt_info.rip6_tag = htons(routetag & 0xffff);
|
|
np = ripbuf->rip6_nets;
|
|
*np = rrt_info;
|
|
nrt = 1;
|
|
ripflush(ifcp, sin6, nrt, np);
|
|
return;
|
|
}
|
|
|
|
maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) -
|
|
sizeof(struct udphdr) -
|
|
sizeof(struct rip6) + sizeof(struct netinfo6)) /
|
|
sizeof(struct netinfo6);
|
|
|
|
nrt = 0; np = ripbuf->rip6_nets; nh = NULL;
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
if (rrt->rrt_rflags & RRTF_NOADVERTISE)
|
|
continue;
|
|
|
|
/* Need to check filter here */
|
|
if (out_filter(rrt, ifcp) == 0)
|
|
continue;
|
|
|
|
/* Check split horizon and other conditions */
|
|
if (tobeadv(rrt, ifcp) == 0)
|
|
continue;
|
|
|
|
/* Only considers the routes with flag if specified */
|
|
if ((flag & RRTF_CHANGED) &&
|
|
(rrt->rrt_rflags & RRTF_CHANGED) == 0)
|
|
continue;
|
|
|
|
/* Check nexthop */
|
|
if (rrt->rrt_index == ifcp->ifc_index &&
|
|
!IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) &&
|
|
(rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) == 0) {
|
|
if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) {
|
|
if (nrt == maxrte - 2) {
|
|
ripflush(ifcp, sin6, nrt, np);
|
|
nh = NULL;
|
|
nrt = 0;
|
|
np = ripbuf->rip6_nets;
|
|
}
|
|
|
|
np->rip6_dest = rrt->rrt_gw;
|
|
np->rip6_plen = 0;
|
|
np->rip6_tag = 0;
|
|
np->rip6_metric = NEXTHOP_METRIC;
|
|
nh = &rrt->rrt_gw;
|
|
np++; nrt++;
|
|
}
|
|
} else if (nh && (rrt->rrt_index != ifcp->ifc_index ||
|
|
!IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) ||
|
|
rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)) {
|
|
/* Reset nexthop */
|
|
if (nrt == maxrte - 2) {
|
|
ripflush(ifcp, sin6, nrt, np);
|
|
nh = NULL;
|
|
nrt = 0;
|
|
np = ripbuf->rip6_nets;
|
|
}
|
|
memset(np, 0, sizeof(struct netinfo6));
|
|
np->rip6_metric = NEXTHOP_METRIC;
|
|
nh = NULL;
|
|
np++; nrt++;
|
|
}
|
|
|
|
/* Put the route to the buffer */
|
|
*np = rrt->rrt_info;
|
|
np++; nrt++;
|
|
if (nrt == maxrte) {
|
|
ripflush(ifcp, sin6, nrt, np);
|
|
nh = NULL;
|
|
nrt = 0;
|
|
np = ripbuf->rip6_nets;
|
|
}
|
|
}
|
|
if (nrt) /* Send last packet */
|
|
ripflush(ifcp, sin6, nrt, np);
|
|
}
|
|
|
|
/*
|
|
* outbound filter logic, per-route/interface.
|
|
*/
|
|
static int
|
|
out_filter(struct riprt *rrt, struct ifc *ifcp)
|
|
{
|
|
struct iff *iffp;
|
|
struct in6_addr ia;
|
|
int ok;
|
|
|
|
/*
|
|
* -A: filter out less specific routes, if we have aggregated
|
|
* route configured.
|
|
*/
|
|
TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
|
|
if (iffp->iff_type != 'A')
|
|
continue;
|
|
if (rrt->rrt_info.rip6_plen <= iffp->iff_plen)
|
|
continue;
|
|
ia = rrt->rrt_info.rip6_dest;
|
|
applyplen(&ia, iffp->iff_plen);
|
|
if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr))
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* if it is an aggregated route, advertise it only to the
|
|
* interfaces specified on -A.
|
|
*/
|
|
if ((rrt->rrt_rflags & RRTF_AGGREGATE) != 0) {
|
|
ok = 0;
|
|
TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
|
|
if (iffp->iff_type != 'A')
|
|
continue;
|
|
if (rrt->rrt_info.rip6_plen == iffp->iff_plen &&
|
|
IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
|
|
&iffp->iff_addr)) {
|
|
ok = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!ok)
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* -O: advertise only if prefix matches the configured prefix.
|
|
*/
|
|
if (iff_find(ifcp, IFIL_TYPE_O) != NULL) {
|
|
ok = 0;
|
|
TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
|
|
if (iffp->iff_type != 'O')
|
|
continue;
|
|
if (rrt->rrt_info.rip6_plen < iffp->iff_plen)
|
|
continue;
|
|
ia = rrt->rrt_info.rip6_dest;
|
|
applyplen(&ia, iffp->iff_plen);
|
|
if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) {
|
|
ok = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!ok)
|
|
return 0;
|
|
}
|
|
|
|
/* the prefix should be advertised */
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Determine if the route is to be advertised on the specified interface.
|
|
* It checks options specified in the arguments and the split horizon rule.
|
|
*/
|
|
static int
|
|
tobeadv(struct riprt *rrt, struct ifc *ifcp)
|
|
{
|
|
|
|
/* Special care for static routes */
|
|
if (rrt->rrt_flags & RTF_STATIC) {
|
|
/* XXX don't advertise reject/blackhole routes */
|
|
if (rrt->rrt_flags & (RTF_REJECT | RTF_BLACKHOLE))
|
|
return 0;
|
|
|
|
if (Sflag) /* Yes, advertise it anyway */
|
|
return 1;
|
|
if (sflag && rrt->rrt_index != ifcp->ifc_index)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
/* Regular split horizon */
|
|
if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Send a rip packet actually.
|
|
*/
|
|
static int
|
|
sendpacket(struct sockaddr_in6 *sin6, int len)
|
|
{
|
|
struct msghdr m;
|
|
struct cmsghdr *cm;
|
|
struct iovec iov[2];
|
|
struct in6_pktinfo *pi;
|
|
u_char cmsgbuf[256];
|
|
int idx;
|
|
struct sockaddr_in6 sincopy;
|
|
|
|
/* do not overwrite the given sin */
|
|
sincopy = *sin6;
|
|
sin6 = &sincopy;
|
|
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) ||
|
|
IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
|
|
idx = sin6->sin6_scope_id;
|
|
else
|
|
idx = 0;
|
|
|
|
m.msg_name = (caddr_t)sin6;
|
|
m.msg_namelen = sizeof(*sin6);
|
|
iov[0].iov_base = (caddr_t)ripbuf;
|
|
iov[0].iov_len = len;
|
|
m.msg_iov = iov;
|
|
m.msg_iovlen = 1;
|
|
m.msg_flags = 0;
|
|
if (!idx) {
|
|
m.msg_control = NULL;
|
|
m.msg_controllen = 0;
|
|
} else {
|
|
memset(cmsgbuf, 0, sizeof(cmsgbuf));
|
|
cm = (struct cmsghdr *)(void *)cmsgbuf;
|
|
m.msg_control = (caddr_t)cm;
|
|
m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo));
|
|
|
|
cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
|
|
cm->cmsg_level = IPPROTO_IPV6;
|
|
cm->cmsg_type = IPV6_PKTINFO;
|
|
pi = (struct in6_pktinfo *)(void *)CMSG_DATA(cm);
|
|
memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/
|
|
pi->ipi6_ifindex = idx;
|
|
}
|
|
|
|
if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) {
|
|
trace(1, "sendmsg: %s\n", strerror(errno));
|
|
return errno;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Receive and process RIP packets. Update the routes/kernel forwarding
|
|
* table if necessary.
|
|
*/
|
|
static void
|
|
riprecv(void)
|
|
{
|
|
struct ifc *ifcp, *ic;
|
|
struct sockaddr_in6 fsock;
|
|
struct in6_addr nh; /* next hop */
|
|
struct rip6 *rp;
|
|
struct netinfo6 *np, *nq;
|
|
struct riprt *rrt;
|
|
ssize_t len, nn;
|
|
unsigned int need_trigger, idx;
|
|
char buf[4 * RIP6_MAXMTU];
|
|
time_t t;
|
|
struct msghdr m;
|
|
struct cmsghdr *cm;
|
|
struct iovec iov[2];
|
|
u_char cmsgbuf[256];
|
|
struct in6_pktinfo *pi = NULL;
|
|
int *hlimp = NULL;
|
|
struct iff *iffp;
|
|
struct in6_addr ia;
|
|
int ok;
|
|
time_t t_half_lifetime;
|
|
|
|
need_trigger = 0;
|
|
|
|
m.msg_name = (caddr_t)&fsock;
|
|
m.msg_namelen = sizeof(fsock);
|
|
iov[0].iov_base = (caddr_t)buf;
|
|
iov[0].iov_len = sizeof(buf);
|
|
m.msg_iov = iov;
|
|
m.msg_iovlen = 1;
|
|
cm = (struct cmsghdr *)(void *)cmsgbuf;
|
|
m.msg_control = (caddr_t)cm;
|
|
m.msg_controllen = sizeof(cmsgbuf);
|
|
m.msg_flags = 0;
|
|
if ((len = recvmsg(ripsock, &m, 0)) < 0) {
|
|
fatal("recvmsg");
|
|
/*NOTREACHED*/
|
|
}
|
|
idx = 0;
|
|
for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m);
|
|
cm;
|
|
cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) {
|
|
if (cm->cmsg_level != IPPROTO_IPV6)
|
|
continue;
|
|
switch (cm->cmsg_type) {
|
|
case IPV6_PKTINFO:
|
|
if (cm->cmsg_len != CMSG_LEN(sizeof(*pi))) {
|
|
trace(1,
|
|
"invalid cmsg length for IPV6_PKTINFO\n");
|
|
return;
|
|
}
|
|
pi = (struct in6_pktinfo *)(void *)CMSG_DATA(cm);
|
|
idx = pi->ipi6_ifindex;
|
|
break;
|
|
case IPV6_HOPLIMIT:
|
|
if (cm->cmsg_len != CMSG_LEN(sizeof(int))) {
|
|
trace(1,
|
|
"invalid cmsg length for IPV6_HOPLIMIT\n");
|
|
return;
|
|
}
|
|
hlimp = (int *)(void *)CMSG_DATA(cm);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ((size_t)len < sizeof(struct rip6)) {
|
|
trace(1, "Packet too short\n");
|
|
return;
|
|
}
|
|
|
|
if (pi == NULL || hlimp == NULL) {
|
|
/*
|
|
* This can happen when the kernel failed to allocate memory
|
|
* for the ancillary data. Although we might be able to handle
|
|
* some cases without this info, those are minor and not so
|
|
* important, so it's better to discard the packet for safer
|
|
* operation.
|
|
*/
|
|
trace(1, "IPv6 packet information cannot be retrieved\n");
|
|
return;
|
|
}
|
|
|
|
nh = fsock.sin6_addr;
|
|
nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
|
|
sizeof(struct netinfo6);
|
|
rp = (struct rip6 *)(void *)buf;
|
|
np = rp->rip6_nets;
|
|
|
|
if (rp->rip6_vers != RIP6_VERSION) {
|
|
trace(1, "Incorrect RIP version %d\n", rp->rip6_vers);
|
|
return;
|
|
}
|
|
if (rp->rip6_cmd == RIP6_REQUEST) {
|
|
if (idx && idx < nindex2ifc) {
|
|
ifcp = index2ifc[idx];
|
|
riprequest(ifcp, np, nn, &fsock);
|
|
} else {
|
|
riprequest(NULL, np, nn, &fsock);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) {
|
|
trace(1, "Response from non-ll addr: %s\n",
|
|
inet6_n2p(&fsock.sin6_addr));
|
|
return; /* Ignore packets from non-link-local addr */
|
|
}
|
|
if (ntohs(fsock.sin6_port) != RIP6_PORT) {
|
|
trace(1, "Response from non-rip port from %s\n",
|
|
inet6_n2p(&fsock.sin6_addr));
|
|
return;
|
|
}
|
|
if (IN6_IS_ADDR_MULTICAST(&pi->ipi6_addr) && *hlimp != 255) {
|
|
trace(1,
|
|
"Response packet with a smaller hop limit (%d) from %s\n",
|
|
*hlimp, inet6_n2p(&fsock.sin6_addr));
|
|
return;
|
|
}
|
|
/*
|
|
* Further validation: since this program does not send off-link
|
|
* requests, an incoming response must always come from an on-link
|
|
* node. Although this is normally ensured by the source address
|
|
* check above, it may not 100% be safe because there are router
|
|
* implementations that (invalidly) allow a packet with a link-local
|
|
* source address to be forwarded to a different link.
|
|
* So we also check whether the destination address is a link-local
|
|
* address or the hop limit is 255. Note that RFC2080 does not require
|
|
* the specific hop limit for a unicast response, so we cannot assume
|
|
* the limitation.
|
|
*/
|
|
if (!IN6_IS_ADDR_LINKLOCAL(&pi->ipi6_addr) && *hlimp != 255) {
|
|
trace(1,
|
|
"Response packet possibly from an off-link node: "
|
|
"from %s to %s hlim=%d\n",
|
|
inet6_n2p(&fsock.sin6_addr),
|
|
inet6_n2p(&pi->ipi6_addr), *hlimp);
|
|
return;
|
|
}
|
|
|
|
idx = fsock.sin6_scope_id;
|
|
ifcp = (idx < nindex2ifc) ? index2ifc[idx] : NULL;
|
|
if (!ifcp) {
|
|
trace(1, "Packets to unknown interface index %d\n", idx);
|
|
return; /* Ignore it */
|
|
}
|
|
if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr))
|
|
return; /* The packet is from me; ignore */
|
|
if (rp->rip6_cmd != RIP6_RESPONSE) {
|
|
trace(1, "Invalid command %d\n", rp->rip6_cmd);
|
|
return;
|
|
}
|
|
|
|
/* -N: no use */
|
|
if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
|
|
return;
|
|
|
|
tracet(1, "Recv(%s): from %s.%d info(%zd)\n",
|
|
ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), nn);
|
|
|
|
t = time(NULL);
|
|
t_half_lifetime = t - (RIP_LIFETIME/2);
|
|
for (; nn; nn--, np++) {
|
|
if (np->rip6_metric == NEXTHOP_METRIC) {
|
|
/* modify neighbor address */
|
|
if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) {
|
|
nh = np->rip6_dest;
|
|
trace(1, "\tNexthop: %s\n", inet6_n2p(&nh));
|
|
} else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) {
|
|
nh = fsock.sin6_addr;
|
|
trace(1, "\tNexthop: %s\n", inet6_n2p(&nh));
|
|
} else {
|
|
nh = fsock.sin6_addr;
|
|
trace(1, "\tInvalid Nexthop: %s\n",
|
|
inet6_n2p(&np->rip6_dest));
|
|
}
|
|
continue;
|
|
}
|
|
if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) {
|
|
trace(1, "\tMulticast netinfo6: %s/%d [%d]\n",
|
|
inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, np->rip6_metric);
|
|
continue;
|
|
}
|
|
if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) {
|
|
trace(1, "\tLoopback netinfo6: %s/%d [%d]\n",
|
|
inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, np->rip6_metric);
|
|
continue;
|
|
}
|
|
if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) {
|
|
trace(1, "\tLink Local netinfo6: %s/%d [%d]\n",
|
|
inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, np->rip6_metric);
|
|
continue;
|
|
}
|
|
/* may need to pass sitelocal prefix in some case, however*/
|
|
if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) {
|
|
trace(1, "\tSite Local netinfo6: %s/%d [%d]\n",
|
|
inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, np->rip6_metric);
|
|
continue;
|
|
}
|
|
trace(2, "\tnetinfo6: %s/%d [%d]",
|
|
inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, np->rip6_metric);
|
|
if (np->rip6_tag)
|
|
trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff);
|
|
if (dflag >= 2) {
|
|
ia = np->rip6_dest;
|
|
applyplen(&ia, np->rip6_plen);
|
|
if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest))
|
|
trace(2, " [junk outside prefix]");
|
|
}
|
|
|
|
/*
|
|
* -L: listen only if the prefix matches the configuration
|
|
*/
|
|
ok = 1; /* if there's no L filter, it is ok */
|
|
TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
|
|
if (iffp->iff_type != IFIL_TYPE_L)
|
|
continue;
|
|
ok = 0;
|
|
if (np->rip6_plen < iffp->iff_plen)
|
|
continue;
|
|
/* special rule: ::/0 means default, not "in /0" */
|
|
if (iffp->iff_plen == 0 && np->rip6_plen > 0)
|
|
continue;
|
|
ia = np->rip6_dest;
|
|
applyplen(&ia, iffp->iff_plen);
|
|
if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) {
|
|
ok = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!ok) {
|
|
trace(2, " (filtered)\n");
|
|
continue;
|
|
}
|
|
|
|
trace(2, "\n");
|
|
np->rip6_metric++;
|
|
np->rip6_metric += ifcp->ifc_metric;
|
|
if (np->rip6_metric > HOPCNT_INFINITY6)
|
|
np->rip6_metric = HOPCNT_INFINITY6;
|
|
|
|
applyplen(&np->rip6_dest, np->rip6_plen);
|
|
if ((rrt = rtsearch(np)) != NULL) {
|
|
if (rrt->rrt_t == 0)
|
|
continue; /* Intf route has priority */
|
|
nq = &rrt->rrt_info;
|
|
if (nq->rip6_metric > np->rip6_metric) {
|
|
if (rrt->rrt_index == ifcp->ifc_index &&
|
|
IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
|
|
/* Small metric from the same gateway */
|
|
nq->rip6_metric = np->rip6_metric;
|
|
} else {
|
|
/* Better route found */
|
|
rrt->rrt_index = ifcp->ifc_index;
|
|
/* Update routing table */
|
|
delroute(nq, &rrt->rrt_gw);
|
|
rrt->rrt_gw = nh;
|
|
*nq = *np;
|
|
addroute(rrt, &nh, ifcp);
|
|
}
|
|
rrt->rrt_rflags |= RRTF_CHANGED;
|
|
rrt->rrt_t = t;
|
|
need_trigger = 1;
|
|
} else if (nq->rip6_metric < np->rip6_metric &&
|
|
rrt->rrt_index == ifcp->ifc_index &&
|
|
IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
|
|
/* Got worse route from same gw */
|
|
nq->rip6_metric = np->rip6_metric;
|
|
rrt->rrt_t = t;
|
|
rrt->rrt_rflags |= RRTF_CHANGED;
|
|
need_trigger = 1;
|
|
} else if (nq->rip6_metric == np->rip6_metric &&
|
|
np->rip6_metric < HOPCNT_INFINITY6) {
|
|
if (rrt->rrt_index == ifcp->ifc_index &&
|
|
IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
|
|
/* same metric, same route from same gw */
|
|
rrt->rrt_t = t;
|
|
} else if (rrt->rrt_t < t_half_lifetime) {
|
|
/* Better route found */
|
|
rrt->rrt_index = ifcp->ifc_index;
|
|
/* Update routing table */
|
|
delroute(nq, &rrt->rrt_gw);
|
|
rrt->rrt_gw = nh;
|
|
*nq = *np;
|
|
addroute(rrt, &nh, ifcp);
|
|
rrt->rrt_rflags |= RRTF_CHANGED;
|
|
rrt->rrt_t = t;
|
|
}
|
|
}
|
|
/*
|
|
* if nq->rip6_metric == HOPCNT_INFINITY6 then
|
|
* do not update age value. Do nothing.
|
|
*/
|
|
} else if (np->rip6_metric < HOPCNT_INFINITY6) {
|
|
/* Got a new valid route */
|
|
if ((rrt = MALLOC(struct riprt)) == NULL) {
|
|
fatal("malloc: struct riprt");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(rrt, 0, sizeof(*rrt));
|
|
nq = &rrt->rrt_info;
|
|
|
|
rrt->rrt_same = NULL;
|
|
rrt->rrt_index = ifcp->ifc_index;
|
|
rrt->rrt_flags = RTF_UP|RTF_GATEWAY;
|
|
rrt->rrt_gw = nh;
|
|
*nq = *np;
|
|
applyplen(&nq->rip6_dest, nq->rip6_plen);
|
|
if (nq->rip6_plen == sizeof(struct in6_addr) * 8)
|
|
rrt->rrt_flags |= RTF_HOST;
|
|
|
|
/* Update routing table */
|
|
addroute(rrt, &nh, ifcp);
|
|
rrt->rrt_rflags |= RRTF_CHANGED;
|
|
need_trigger = 1;
|
|
rrt->rrt_t = t;
|
|
|
|
/* Put the route to the list */
|
|
TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
|
|
}
|
|
}
|
|
/* XXX need to care the interval between triggered updates */
|
|
if (need_trigger) {
|
|
if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) {
|
|
TAILQ_FOREACH(ic, &ifc_head, ifc_next) {
|
|
if (ifcp->ifc_index == ic->ifc_index)
|
|
continue;
|
|
if (ic->ifc_flags & IFF_UP)
|
|
ripsend(ic, &ic->ifc_ripsin,
|
|
RRTF_CHANGED);
|
|
}
|
|
}
|
|
/* Reset the flag */
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
rrt->rrt_rflags &= ~RRTF_CHANGED;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Send all routes request packet to the specified interface.
|
|
*/
|
|
static void
|
|
sendrequest(struct ifc *ifcp)
|
|
{
|
|
struct netinfo6 *np;
|
|
int error;
|
|
|
|
if (ifcp->ifc_flags & IFF_LOOPBACK)
|
|
return;
|
|
ripbuf->rip6_cmd = RIP6_REQUEST;
|
|
np = ripbuf->rip6_nets;
|
|
memset(np, 0, sizeof(struct netinfo6));
|
|
np->rip6_metric = HOPCNT_INFINITY6;
|
|
tracet(1, "Send rtdump Request to %s (%s)\n",
|
|
ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
|
|
error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1));
|
|
if (error == EAFNOSUPPORT) {
|
|
/* Protocol not supported */
|
|
tracet(1, "Could not send rtdump Request to %s (%s): "
|
|
"set IFF_UP to 0\n",
|
|
ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
|
|
ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */
|
|
}
|
|
ripbuf->rip6_cmd = RIP6_RESPONSE;
|
|
}
|
|
|
|
/*
|
|
* Process a RIP6_REQUEST packet.
|
|
*/
|
|
static void
|
|
riprequest(struct ifc *ifcp,
|
|
struct netinfo6 *np,
|
|
int nn,
|
|
struct sockaddr_in6 *sin6)
|
|
{
|
|
int i;
|
|
struct riprt *rrt;
|
|
|
|
if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) &&
|
|
np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) {
|
|
/* Specific response, don't split-horizon */
|
|
trace(1, "\tRIP Request\n");
|
|
for (i = 0; i < nn; i++, np++) {
|
|
rrt = rtsearch(np);
|
|
if (rrt)
|
|
np->rip6_metric = rrt->rrt_info.rip6_metric;
|
|
else
|
|
np->rip6_metric = HOPCNT_INFINITY6;
|
|
}
|
|
(void)sendpacket(sin6, RIPSIZE(nn));
|
|
return;
|
|
}
|
|
/* Whole routing table dump */
|
|
trace(1, "\tRIP Request -- whole routing table\n");
|
|
ripsend(ifcp, sin6, RRTF_SENDANYWAY);
|
|
}
|
|
|
|
/*
|
|
* Get information of each interface.
|
|
*/
|
|
static void
|
|
ifconfig(void)
|
|
{
|
|
struct ifaddrs *ifap, *ifa;
|
|
struct ifc *ifcp;
|
|
struct ipv6_mreq mreq;
|
|
int s;
|
|
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
|
|
fatal("socket");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
if (getifaddrs(&ifap) != 0) {
|
|
fatal("getifaddrs");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
ifcp = ifc_find(ifa->ifa_name);
|
|
/* we are interested in multicast-capable interfaces */
|
|
if ((ifa->ifa_flags & IFF_MULTICAST) == 0)
|
|
continue;
|
|
if (!ifcp) {
|
|
/* new interface */
|
|
if ((ifcp = MALLOC(struct ifc)) == NULL) {
|
|
fatal("malloc: struct ifc");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(ifcp, 0, sizeof(*ifcp));
|
|
|
|
ifcp->ifc_index = -1;
|
|
strlcpy(ifcp->ifc_name, ifa->ifa_name,
|
|
sizeof(ifcp->ifc_name));
|
|
TAILQ_INIT(&ifcp->ifc_ifac_head);
|
|
TAILQ_INIT(&ifcp->ifc_iff_head);
|
|
ifcp->ifc_flags = ifa->ifa_flags;
|
|
TAILQ_INSERT_HEAD(&ifc_head, ifcp, ifc_next);
|
|
trace(1, "newif %s <%s>\n", ifcp->ifc_name,
|
|
ifflags(ifcp->ifc_flags));
|
|
if (!strcmp(ifcp->ifc_name, LOOPBACK_IF))
|
|
loopifcp = ifcp;
|
|
} else {
|
|
/* update flag, this may be up again */
|
|
if (ifcp->ifc_flags != ifa->ifa_flags) {
|
|
trace(1, "%s: <%s> -> ", ifcp->ifc_name,
|
|
ifflags(ifcp->ifc_flags));
|
|
trace(1, "<%s>\n", ifflags(ifa->ifa_flags));
|
|
ifcp->ifc_cflags |= IFC_CHANGED;
|
|
}
|
|
ifcp->ifc_flags = ifa->ifa_flags;
|
|
}
|
|
if (ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s) < 0) {
|
|
/* maybe temporary failure */
|
|
continue;
|
|
}
|
|
if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP
|
|
&& 0 < ifcp->ifc_index && !ifcp->ifc_joined) {
|
|
mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr;
|
|
mreq.ipv6mr_interface = ifcp->ifc_index;
|
|
if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
|
|
&mreq, sizeof(mreq)) < 0) {
|
|
fatal("IPV6_JOIN_GROUP");
|
|
/*NOTREACHED*/
|
|
}
|
|
trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST);
|
|
ifcp->ifc_joined++;
|
|
}
|
|
}
|
|
close(s);
|
|
freeifaddrs(ifap);
|
|
}
|
|
|
|
static int
|
|
ifconfig1(const char *name,
|
|
const struct sockaddr *sa,
|
|
struct ifc *ifcp,
|
|
int s)
|
|
{
|
|
struct in6_ifreq ifr;
|
|
const struct sockaddr_in6 *sin6;
|
|
struct ifac *ifac;
|
|
int plen;
|
|
char buf[BUFSIZ];
|
|
|
|
sin6 = (const struct sockaddr_in6 *)(const void *)sa;
|
|
if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && !lflag)
|
|
return (-1);
|
|
ifr.ifr_addr = *sin6;
|
|
strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
|
|
if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) {
|
|
syslog(LOG_INFO, "ioctl: SIOCGIFNETMASK_IN6");
|
|
return (-1);
|
|
}
|
|
plen = sin6mask2len(&ifr.ifr_addr);
|
|
if ((ifac = ifa_match(ifcp, &sin6->sin6_addr, plen)) != NULL) {
|
|
/* same interface found */
|
|
/* need check if something changed */
|
|
/* XXX not yet implemented */
|
|
return (-1);
|
|
}
|
|
/*
|
|
* New address is found
|
|
*/
|
|
if ((ifac = MALLOC(struct ifac)) == NULL) {
|
|
fatal("malloc: struct ifac");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(ifac, 0, sizeof(*ifac));
|
|
|
|
ifac->ifac_ifc = ifcp;
|
|
ifac->ifac_addr = sin6->sin6_addr;
|
|
ifac->ifac_plen = plen;
|
|
ifac->ifac_scope_id = sin6->sin6_scope_id;
|
|
if (ifcp->ifc_flags & IFF_POINTOPOINT) {
|
|
ifr.ifr_addr = *sin6;
|
|
if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) {
|
|
fatal("ioctl: SIOCGIFDSTADDR_IN6");
|
|
/*NOTREACHED*/
|
|
}
|
|
ifac->ifac_raddr = ifr.ifr_dstaddr.sin6_addr;
|
|
inet_ntop(AF_INET6, (void *)&ifac->ifac_raddr, buf,
|
|
sizeof(buf));
|
|
trace(1, "found address %s/%d -- %s\n",
|
|
inet6_n2p(&ifac->ifac_addr), ifac->ifac_plen, buf);
|
|
} else {
|
|
trace(1, "found address %s/%d\n",
|
|
inet6_n2p(&ifac->ifac_addr), ifac->ifac_plen);
|
|
}
|
|
if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifac->ifac_addr)) {
|
|
ifcp->ifc_mylladdr = ifac->ifac_addr;
|
|
ifcp->ifc_index = ifac->ifac_scope_id;
|
|
memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len);
|
|
ifcp->ifc_ripsin.sin6_scope_id = ifcp->ifc_index;
|
|
setindex2ifc(ifcp->ifc_index, ifcp);
|
|
ifcp->ifc_mtu = getifmtu(ifcp->ifc_index);
|
|
if (ifcp->ifc_mtu > RIP6_MAXMTU)
|
|
ifcp->ifc_mtu = RIP6_MAXMTU;
|
|
if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) {
|
|
fatal("ioctl: SIOCGIFMETRIC");
|
|
/*NOTREACHED*/
|
|
}
|
|
ifcp->ifc_metric = ifr.ifr_metric;
|
|
trace(1, "\tindex: %d, mtu: %d, metric: %d\n",
|
|
ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric);
|
|
} else
|
|
ifcp->ifc_cflags |= IFC_CHANGED;
|
|
|
|
TAILQ_INSERT_HEAD(&ifcp->ifc_ifac_head, ifac, ifac_next);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
ifremove(int ifindex)
|
|
{
|
|
struct ifc *ifcp;
|
|
struct riprt *rrt;
|
|
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if (ifcp->ifc_index == ifindex)
|
|
break;
|
|
}
|
|
if (ifcp == NULL)
|
|
return;
|
|
|
|
tracet(1, "ifremove: %s is departed.\n", ifcp->ifc_name);
|
|
TAILQ_REMOVE(&ifc_head, ifcp, ifc_next);
|
|
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
if (rrt->rrt_index == ifcp->ifc_index &&
|
|
rrt->rrt_rflags & RRTF_AGGREGATE)
|
|
delroute(&rrt->rrt_info, &rrt->rrt_gw);
|
|
}
|
|
free(ifcp);
|
|
}
|
|
|
|
/*
|
|
* Receive and process routing messages.
|
|
* Update interface information as necesssary.
|
|
*/
|
|
static void
|
|
rtrecv(void)
|
|
{
|
|
char buf[BUFSIZ];
|
|
char *p, *q = NULL;
|
|
struct rt_msghdr *rtm;
|
|
struct ifa_msghdr *ifam;
|
|
struct if_msghdr *ifm;
|
|
struct if_announcemsghdr *ifan;
|
|
int len;
|
|
struct ifc *ifcp, *ic;
|
|
int iface = 0, rtable = 0;
|
|
struct sockaddr_in6 *rta[RTAX_MAX];
|
|
struct sockaddr_in6 mask;
|
|
int i, addrs = 0;
|
|
struct riprt *rrt;
|
|
|
|
if ((len = read(rtsock, buf, sizeof(buf))) < 0) {
|
|
perror("read from rtsock");
|
|
exit(1);
|
|
}
|
|
if (len == 0)
|
|
return;
|
|
#if 0
|
|
if (len < sizeof(*rtm)) {
|
|
trace(1, "short read from rtsock: %d (should be > %lu)\n",
|
|
len, (u_long)sizeof(*rtm));
|
|
return;
|
|
}
|
|
#endif
|
|
if (dflag >= 2) {
|
|
fprintf(stderr, "rtmsg:\n");
|
|
for (i = 0; i < len; i++) {
|
|
fprintf(stderr, "%02x ", buf[i] & 0xff);
|
|
if (i % 16 == 15) fprintf(stderr, "\n");
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
for (p = buf; p - buf < len; p +=
|
|
((struct rt_msghdr *)(void *)p)->rtm_msglen) {
|
|
if (((struct rt_msghdr *)(void *)p)->rtm_version != RTM_VERSION)
|
|
continue;
|
|
|
|
/* safety against bogus message */
|
|
if (((struct rt_msghdr *)(void *)p)->rtm_msglen <= 0) {
|
|
trace(1, "bogus rtmsg: length=%d\n",
|
|
((struct rt_msghdr *)(void *)p)->rtm_msglen);
|
|
break;
|
|
}
|
|
rtm = NULL;
|
|
ifam = NULL;
|
|
ifm = NULL;
|
|
switch (((struct rt_msghdr *)(void *)p)->rtm_type) {
|
|
case RTM_NEWADDR:
|
|
case RTM_DELADDR:
|
|
ifam = (struct ifa_msghdr *)(void *)p;
|
|
addrs = ifam->ifam_addrs;
|
|
q = (char *)(ifam + 1);
|
|
break;
|
|
case RTM_IFINFO:
|
|
ifm = (struct if_msghdr *)(void *)p;
|
|
addrs = ifm->ifm_addrs;
|
|
q = (char *)(ifm + 1);
|
|
break;
|
|
case RTM_IFANNOUNCE:
|
|
ifan = (struct if_announcemsghdr *)(void *)p;
|
|
switch (ifan->ifan_what) {
|
|
case IFAN_ARRIVAL:
|
|
iface++;
|
|
break;
|
|
case IFAN_DEPARTURE:
|
|
ifremove(ifan->ifan_index);
|
|
iface++;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
rtm = (struct rt_msghdr *)(void *)p;
|
|
if (rtm->rtm_version != RTM_VERSION) {
|
|
trace(1, "unexpected rtmsg version %d "
|
|
"(should be %d)\n",
|
|
rtm->rtm_version, RTM_VERSION);
|
|
continue;
|
|
}
|
|
/*
|
|
* Only messages that use the struct rt_msghdr
|
|
* format are allowed beyond this point.
|
|
*/
|
|
if (rtm->rtm_type > RTM_RESOLVE) {
|
|
trace(1, "rtmsg type %d ignored\n",
|
|
rtm->rtm_type);
|
|
continue;
|
|
}
|
|
addrs = rtm->rtm_addrs;
|
|
q = (char *)(rtm + 1);
|
|
if (rtm->rtm_pid == pid) {
|
|
#if 0
|
|
trace(1, "rtmsg looped back to me, ignored\n");
|
|
#endif
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
memset(&rta, 0, sizeof(rta));
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
if (addrs & (1 << i)) {
|
|
rta[i] = (struct sockaddr_in6 *)(void *)q;
|
|
q += ROUNDUP(rta[i]->sin6_len);
|
|
}
|
|
}
|
|
|
|
trace(1, "rtsock: %s (addrs=%x)\n",
|
|
rttypes((struct rt_msghdr *)(void *)p), addrs);
|
|
if (dflag >= 2) {
|
|
for (i = 0;
|
|
i < ((struct rt_msghdr *)(void *)p)->rtm_msglen;
|
|
i++) {
|
|
fprintf(stderr, "%02x ", p[i] & 0xff);
|
|
if (i % 16 == 15) fprintf(stderr, "\n");
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
/*
|
|
* Easy ones first.
|
|
*
|
|
* We may be able to optimize by using ifm->ifm_index or
|
|
* ifam->ifam_index. For simplicity we don't do that here.
|
|
*/
|
|
switch (((struct rt_msghdr *)(void *)p)->rtm_type) {
|
|
case RTM_NEWADDR:
|
|
case RTM_IFINFO:
|
|
iface++;
|
|
continue;
|
|
case RTM_ADD:
|
|
rtable++;
|
|
continue;
|
|
case RTM_LOSING:
|
|
case RTM_MISS:
|
|
case RTM_GET:
|
|
case RTM_LOCK:
|
|
/* nothing to be done here */
|
|
trace(1, "\tnothing to be done, ignored\n");
|
|
continue;
|
|
}
|
|
|
|
#if 0
|
|
if (rta[RTAX_DST] == NULL) {
|
|
trace(1, "\tno destination, ignored\n");
|
|
continue;
|
|
}
|
|
if (rta[RTAX_DST]->sin6_family != AF_INET6) {
|
|
trace(1, "\taf mismatch, ignored\n");
|
|
continue;
|
|
}
|
|
if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) {
|
|
trace(1, "\tlinklocal destination, ignored\n");
|
|
continue;
|
|
}
|
|
if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) {
|
|
trace(1, "\tloopback destination, ignored\n");
|
|
continue; /* Loopback */
|
|
}
|
|
if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) {
|
|
trace(1, "\tmulticast destination, ignored\n");
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
/* hard ones */
|
|
switch (((struct rt_msghdr *)(void *)p)->rtm_type) {
|
|
case RTM_NEWADDR:
|
|
case RTM_IFINFO:
|
|
case RTM_ADD:
|
|
case RTM_LOSING:
|
|
case RTM_MISS:
|
|
case RTM_GET:
|
|
case RTM_LOCK:
|
|
/* should already be handled */
|
|
fatal("rtrecv: never reach here");
|
|
/*NOTREACHED*/
|
|
case RTM_DELETE:
|
|
if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY]) {
|
|
trace(1, "\tsome of dst/gw/netamsk are "
|
|
"unavailable, ignored\n");
|
|
break;
|
|
}
|
|
if ((rtm->rtm_flags & RTF_HOST) != 0) {
|
|
mask.sin6_len = sizeof(mask);
|
|
memset(&mask.sin6_addr, 0xff,
|
|
sizeof(mask.sin6_addr));
|
|
rta[RTAX_NETMASK] = &mask;
|
|
} else if (!rta[RTAX_NETMASK]) {
|
|
trace(1, "\tsome of dst/gw/netamsk are "
|
|
"unavailable, ignored\n");
|
|
break;
|
|
}
|
|
if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY],
|
|
rta[RTAX_NETMASK]) == 0) {
|
|
rtable++; /*just to be sure*/
|
|
}
|
|
break;
|
|
case RTM_CHANGE:
|
|
case RTM_REDIRECT:
|
|
trace(1, "\tnot supported yet, ignored\n");
|
|
break;
|
|
case RTM_DELADDR:
|
|
if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) {
|
|
trace(1, "\tno netmask or ifa given, ignored\n");
|
|
break;
|
|
}
|
|
if (ifam->ifam_index < nindex2ifc)
|
|
ifcp = index2ifc[ifam->ifam_index];
|
|
else
|
|
ifcp = NULL;
|
|
if (!ifcp) {
|
|
trace(1, "\tinvalid ifam_index %d, ignored\n",
|
|
ifam->ifam_index);
|
|
break;
|
|
}
|
|
if (!rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK]))
|
|
iface++;
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
if (iface) {
|
|
trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n");
|
|
ifconfig();
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if (ifcp->ifc_cflags & IFC_CHANGED) {
|
|
if (ifrt(ifcp, 1)) {
|
|
TAILQ_FOREACH(ic, &ifc_head, ifc_next) {
|
|
if (ifcp->ifc_index == ic->ifc_index)
|
|
continue;
|
|
if (ic->ifc_flags & IFF_UP)
|
|
ripsend(ic, &ic->ifc_ripsin,
|
|
RRTF_CHANGED);
|
|
}
|
|
/* Reset the flag */
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
rrt->rrt_rflags &= ~RRTF_CHANGED;
|
|
}
|
|
}
|
|
ifcp->ifc_cflags &= ~IFC_CHANGED;
|
|
}
|
|
}
|
|
}
|
|
if (rtable) {
|
|
trace(1, "rtsock: read routing table again\n");
|
|
krtread(1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* remove specified route from the internal routing table.
|
|
*/
|
|
static int
|
|
rt_del(const struct sockaddr_in6 *sdst,
|
|
const struct sockaddr_in6 *sgw,
|
|
const struct sockaddr_in6 *smask)
|
|
{
|
|
const struct in6_addr *dst = NULL;
|
|
const struct in6_addr *gw = NULL;
|
|
int prefix;
|
|
struct netinfo6 ni6;
|
|
struct riprt *rrt = NULL;
|
|
time_t t_lifetime;
|
|
|
|
if (sdst->sin6_family != AF_INET6) {
|
|
trace(1, "\tother AF, ignored\n");
|
|
return -1;
|
|
}
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr)
|
|
|| IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback)
|
|
|| IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) {
|
|
trace(1, "\taddress %s not interesting, ignored\n",
|
|
inet6_n2p(&sdst->sin6_addr));
|
|
return -1;
|
|
}
|
|
dst = &sdst->sin6_addr;
|
|
if (sgw->sin6_family == AF_INET6) {
|
|
/* easy case */
|
|
gw = &sgw->sin6_addr;
|
|
prefix = sin6mask2len(smask);
|
|
} else if (sgw->sin6_family == AF_LINK) {
|
|
/*
|
|
* Interface route... a hard case. We need to get the prefix
|
|
* length from the kernel, but we now are parsing rtmsg.
|
|
* We'll purge matching routes from my list, then get the
|
|
* fresh list.
|
|
*/
|
|
struct riprt *longest;
|
|
trace(1, "\t%s is an interface route, guessing prefixlen\n",
|
|
inet6_n2p(dst));
|
|
longest = NULL;
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
|
|
&sdst->sin6_addr)
|
|
&& IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) {
|
|
if (!longest
|
|
|| longest->rrt_info.rip6_plen <
|
|
rrt->rrt_info.rip6_plen) {
|
|
longest = rrt;
|
|
}
|
|
}
|
|
}
|
|
rrt = longest;
|
|
if (!rrt) {
|
|
trace(1, "\tno matching interface route found\n");
|
|
return -1;
|
|
}
|
|
gw = &in6addr_loopback;
|
|
prefix = rrt->rrt_info.rip6_plen;
|
|
} else {
|
|
trace(1, "\tunsupported af: (gw=%d)\n", sgw->sin6_family);
|
|
return -1;
|
|
}
|
|
|
|
trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix);
|
|
trace(1, "gw %s\n", inet6_n2p(gw));
|
|
t_lifetime = time(NULL) - RIP_LIFETIME;
|
|
/* age route for interface address */
|
|
memset(&ni6, 0, sizeof(ni6));
|
|
ni6.rip6_dest = *dst;
|
|
ni6.rip6_plen = prefix;
|
|
applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/
|
|
trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest),
|
|
ni6.rip6_plen);
|
|
if (!rrt && (rrt = rtsearch(&ni6)) == NULL) {
|
|
trace(1, "\tno route found\n");
|
|
return -1;
|
|
}
|
|
#if 0
|
|
if ((rrt->rrt_flags & RTF_STATIC) == 0) {
|
|
trace(1, "\tyou can delete static routes only\n");
|
|
} else
|
|
#endif
|
|
if (!IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, gw)) {
|
|
trace(1, "\tgw mismatch: %s <-> ",
|
|
inet6_n2p(&rrt->rrt_gw));
|
|
trace(1, "%s\n", inet6_n2p(gw));
|
|
} else {
|
|
trace(1, "\troute found, age it\n");
|
|
if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
|
|
rrt->rrt_t = t_lifetime;
|
|
rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* remove specified address from internal interface/routing table.
|
|
*/
|
|
static int
|
|
rt_deladdr(struct ifc *ifcp,
|
|
const struct sockaddr_in6 *sifa,
|
|
const struct sockaddr_in6 *smask)
|
|
{
|
|
const struct in6_addr *addr = NULL;
|
|
int prefix;
|
|
struct ifac *ifac = NULL;
|
|
struct netinfo6 ni6;
|
|
struct riprt *rrt = NULL;
|
|
time_t t_lifetime;
|
|
int updated = 0;
|
|
|
|
if (sifa->sin6_family != AF_INET6) {
|
|
trace(1, "\tother AF, ignored\n");
|
|
return -1;
|
|
}
|
|
addr = &sifa->sin6_addr;
|
|
prefix = sin6mask2len(smask);
|
|
|
|
trace(1, "\tdeleting %s/%d from %s\n",
|
|
inet6_n2p(addr), prefix, ifcp->ifc_name);
|
|
ifac = ifa_match(ifcp, addr, prefix);
|
|
if (!ifac) {
|
|
trace(1, "\tno matching ifa found for %s/%d on %s\n",
|
|
inet6_n2p(addr), prefix, ifcp->ifc_name);
|
|
return -1;
|
|
}
|
|
if (ifac->ifac_ifc != ifcp) {
|
|
trace(1, "\taddress table corrupt: back pointer does not match "
|
|
"(%s != %s)\n",
|
|
ifcp->ifc_name, ifac->ifac_ifc->ifc_name);
|
|
return -1;
|
|
}
|
|
TAILQ_REMOVE(&ifcp->ifc_ifac_head, ifac, ifac_next);
|
|
t_lifetime = time(NULL) - RIP_LIFETIME;
|
|
/* age route for interface address */
|
|
memset(&ni6, 0, sizeof(ni6));
|
|
ni6.rip6_dest = ifac->ifac_addr;
|
|
ni6.rip6_plen = ifac->ifac_plen;
|
|
applyplen(&ni6.rip6_dest, ni6.rip6_plen);
|
|
trace(1, "\tfind interface route %s/%d on %d\n",
|
|
inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index);
|
|
if ((rrt = rtsearch(&ni6)) != NULL) {
|
|
struct in6_addr none;
|
|
memset(&none, 0, sizeof(none));
|
|
if (rrt->rrt_index == ifcp->ifc_index &&
|
|
(IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &none) ||
|
|
IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw))) {
|
|
trace(1, "\troute found, age it\n");
|
|
if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
|
|
rrt->rrt_t = t_lifetime;
|
|
rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
|
|
}
|
|
updated++;
|
|
} else {
|
|
trace(1, "\tnon-interface route found: %s/%d on %d\n",
|
|
inet6_n2p(&rrt->rrt_info.rip6_dest),
|
|
rrt->rrt_info.rip6_plen,
|
|
rrt->rrt_index);
|
|
}
|
|
} else
|
|
trace(1, "\tno interface route found\n");
|
|
/* age route for p2p destination */
|
|
if (ifcp->ifc_flags & IFF_POINTOPOINT) {
|
|
memset(&ni6, 0, sizeof(ni6));
|
|
ni6.rip6_dest = ifac->ifac_raddr;
|
|
ni6.rip6_plen = 128;
|
|
applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/
|
|
trace(1, "\tfind p2p route %s/%d on %d\n",
|
|
inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen,
|
|
ifcp->ifc_index);
|
|
if ((rrt = rtsearch(&ni6)) != NULL) {
|
|
if (rrt->rrt_index == ifcp->ifc_index &&
|
|
IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw,
|
|
&ifac->ifac_addr)) {
|
|
trace(1, "\troute found, age it\n");
|
|
if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
|
|
rrt->rrt_t = t_lifetime;
|
|
rrt->rrt_info.rip6_metric =
|
|
HOPCNT_INFINITY6;
|
|
updated++;
|
|
}
|
|
} else {
|
|
trace(1, "\tnon-p2p route found: %s/%d on %d\n",
|
|
inet6_n2p(&rrt->rrt_info.rip6_dest),
|
|
rrt->rrt_info.rip6_plen,
|
|
rrt->rrt_index);
|
|
}
|
|
} else
|
|
trace(1, "\tno p2p route found\n");
|
|
}
|
|
free(ifac);
|
|
|
|
return ((updated) ? 0 : -1);
|
|
}
|
|
|
|
/*
|
|
* Get each interface address and put those interface routes to the route
|
|
* list.
|
|
*/
|
|
static int
|
|
ifrt(struct ifc *ifcp, int again)
|
|
{
|
|
struct ifac *ifac;
|
|
struct riprt *rrt = NULL, *search_rrt, *loop_rrt;
|
|
struct netinfo6 *np;
|
|
time_t t_lifetime;
|
|
int need_trigger = 0;
|
|
|
|
#if 0
|
|
if (ifcp->ifc_flags & IFF_LOOPBACK)
|
|
return 0; /* ignore loopback */
|
|
#endif
|
|
|
|
if (ifcp->ifc_flags & IFF_POINTOPOINT) {
|
|
ifrt_p2p(ifcp, again);
|
|
return 0;
|
|
}
|
|
|
|
TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
|
|
if (IN6_IS_ADDR_LINKLOCAL(&ifac->ifac_addr)) {
|
|
#if 0
|
|
trace(1, "route: %s on %s: "
|
|
"skip linklocal interface address\n",
|
|
inet6_n2p(&ifac->ifac_addr), ifcp->ifc_name);
|
|
#endif
|
|
continue;
|
|
}
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&ifac->ifac_addr)) {
|
|
#if 0
|
|
trace(1, "route: %s: skip unspec interface address\n",
|
|
ifcp->ifc_name);
|
|
#endif
|
|
continue;
|
|
}
|
|
if (IN6_IS_ADDR_LOOPBACK(&ifac->ifac_addr)) {
|
|
#if 0
|
|
trace(1, "route: %s: skip loopback address\n",
|
|
ifcp->ifc_name);
|
|
#endif
|
|
continue;
|
|
}
|
|
if (ifcp->ifc_flags & IFF_UP) {
|
|
if ((rrt = MALLOC(struct riprt)) == NULL)
|
|
fatal("malloc: struct riprt");
|
|
memset(rrt, 0, sizeof(*rrt));
|
|
rrt->rrt_same = NULL;
|
|
rrt->rrt_index = ifcp->ifc_index;
|
|
rrt->rrt_t = 0; /* don't age */
|
|
rrt->rrt_info.rip6_dest = ifac->ifac_addr;
|
|
rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
|
|
rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric;
|
|
rrt->rrt_info.rip6_plen = ifac->ifac_plen;
|
|
rrt->rrt_flags = RTF_HOST;
|
|
rrt->rrt_rflags |= RRTF_CHANGED;
|
|
applyplen(&rrt->rrt_info.rip6_dest, ifac->ifac_plen);
|
|
memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
|
|
rrt->rrt_gw = ifac->ifac_addr;
|
|
np = &rrt->rrt_info;
|
|
search_rrt = rtsearch(np);
|
|
if (search_rrt != NULL) {
|
|
if (search_rrt->rrt_info.rip6_metric <=
|
|
rrt->rrt_info.rip6_metric) {
|
|
/* Already have better route */
|
|
if (!again) {
|
|
trace(1, "route: %s/%d: "
|
|
"already registered (%s)\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen,
|
|
ifcp->ifc_name);
|
|
}
|
|
goto next;
|
|
}
|
|
|
|
TAILQ_REMOVE(&riprt_head, rrt, rrt_next);
|
|
delroute(&rrt->rrt_info, &rrt->rrt_gw);
|
|
}
|
|
/* Attach the route to the list */
|
|
trace(1, "route: %s/%d: register route (%s)\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen,
|
|
ifcp->ifc_name);
|
|
TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
|
|
addroute(rrt, &rrt->rrt_gw, ifcp);
|
|
rrt = NULL;
|
|
sendrequest(ifcp);
|
|
ripsend(ifcp, &ifcp->ifc_ripsin, 0);
|
|
need_trigger = 1;
|
|
} else {
|
|
TAILQ_FOREACH(loop_rrt, &riprt_head, rrt_next) {
|
|
if (loop_rrt->rrt_index == ifcp->ifc_index) {
|
|
t_lifetime = time(NULL) - RIP_LIFETIME;
|
|
if (loop_rrt->rrt_t == 0 || loop_rrt->rrt_t > t_lifetime) {
|
|
loop_rrt->rrt_t = t_lifetime;
|
|
loop_rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
|
|
loop_rrt->rrt_rflags |= RRTF_CHANGED;
|
|
need_trigger = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
next:
|
|
if (rrt)
|
|
free(rrt);
|
|
}
|
|
return need_trigger;
|
|
}
|
|
|
|
/*
|
|
* there are couple of p2p interface routing models. "behavior" lets
|
|
* you pick one. it looks that gated behavior fits best with BSDs,
|
|
* since BSD kernels do not look at prefix length on p2p interfaces.
|
|
*/
|
|
static void
|
|
ifrt_p2p(struct ifc *ifcp, int again)
|
|
{
|
|
struct ifac *ifac;
|
|
struct riprt *rrt, *orrt;
|
|
struct netinfo6 *np;
|
|
struct in6_addr addr, dest;
|
|
int advert, ignore, i;
|
|
#define P2PADVERT_NETWORK 1
|
|
#define P2PADVERT_ADDR 2
|
|
#define P2PADVERT_DEST 4
|
|
#define P2PADVERT_MAX 4
|
|
const enum { CISCO, GATED, ROUTE6D } behavior = GATED;
|
|
const char *category = "";
|
|
const char *noadv;
|
|
|
|
TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
|
|
addr = ifac->ifac_addr;
|
|
dest = ifac->ifac_raddr;
|
|
applyplen(&addr, ifac->ifac_plen);
|
|
applyplen(&dest, ifac->ifac_plen);
|
|
advert = ignore = 0;
|
|
switch (behavior) {
|
|
case CISCO:
|
|
/*
|
|
* honor addr/plen, just like normal shared medium
|
|
* interface. this may cause trouble if you reuse
|
|
* addr/plen on other interfaces.
|
|
*
|
|
* advertise addr/plen.
|
|
*/
|
|
advert |= P2PADVERT_NETWORK;
|
|
break;
|
|
case GATED:
|
|
/*
|
|
* prefixlen on p2p interface is meaningless.
|
|
* advertise addr/128 and dest/128.
|
|
*
|
|
* do not install network route to route6d routing
|
|
* table (if we do, it would prevent route installation
|
|
* for other p2p interface that shares addr/plen).
|
|
*
|
|
* XXX what should we do if dest is ::? it will not
|
|
* get announced anyways (see following filter),
|
|
* but we need to think.
|
|
*/
|
|
advert |= P2PADVERT_ADDR;
|
|
advert |= P2PADVERT_DEST;
|
|
ignore |= P2PADVERT_NETWORK;
|
|
break;
|
|
case ROUTE6D:
|
|
/*
|
|
* just for testing. actually the code is redundant
|
|
* given the current p2p interface address assignment
|
|
* rule for kame kernel.
|
|
*
|
|
* intent:
|
|
* A/n -> announce A/n
|
|
* A B/n, A and B share prefix -> A/n (= B/n)
|
|
* A B/n, do not share prefix -> A/128 and B/128
|
|
* actually, A/64 and A B/128 are the only cases
|
|
* permitted by the kernel:
|
|
* A/64 -> A/64
|
|
* A B/128 -> A/128 and B/128
|
|
*/
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&ifac->ifac_raddr)) {
|
|
if (IN6_ARE_ADDR_EQUAL(&addr, &dest))
|
|
advert |= P2PADVERT_NETWORK;
|
|
else {
|
|
advert |= P2PADVERT_ADDR;
|
|
advert |= P2PADVERT_DEST;
|
|
ignore |= P2PADVERT_NETWORK;
|
|
}
|
|
} else
|
|
advert |= P2PADVERT_NETWORK;
|
|
break;
|
|
}
|
|
|
|
for (i = 1; i <= P2PADVERT_MAX; i *= 2) {
|
|
if ((ignore & i) != 0)
|
|
continue;
|
|
if ((rrt = MALLOC(struct riprt)) == NULL) {
|
|
fatal("malloc: struct riprt");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(rrt, 0, sizeof(*rrt));
|
|
rrt->rrt_same = NULL;
|
|
rrt->rrt_index = ifcp->ifc_index;
|
|
rrt->rrt_t = 0; /* don't age */
|
|
switch (i) {
|
|
case P2PADVERT_NETWORK:
|
|
rrt->rrt_info.rip6_dest = ifac->ifac_addr;
|
|
rrt->rrt_info.rip6_plen = ifac->ifac_plen;
|
|
applyplen(&rrt->rrt_info.rip6_dest,
|
|
ifac->ifac_plen);
|
|
category = "network";
|
|
break;
|
|
case P2PADVERT_ADDR:
|
|
rrt->rrt_info.rip6_dest = ifac->ifac_addr;
|
|
rrt->rrt_info.rip6_plen = 128;
|
|
rrt->rrt_gw = in6addr_loopback;
|
|
category = "addr";
|
|
break;
|
|
case P2PADVERT_DEST:
|
|
rrt->rrt_info.rip6_dest = ifac->ifac_raddr;
|
|
rrt->rrt_info.rip6_plen = 128;
|
|
rrt->rrt_gw = ifac->ifac_addr;
|
|
category = "dest";
|
|
break;
|
|
}
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest) ||
|
|
IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)) {
|
|
#if 0
|
|
trace(1, "route: %s: skip unspec/linklocal "
|
|
"(%s on %s)\n", category, ifcp->ifc_name);
|
|
#endif
|
|
free(rrt);
|
|
continue;
|
|
}
|
|
if ((advert & i) == 0) {
|
|
rrt->rrt_rflags |= RRTF_NOADVERTISE;
|
|
noadv = ", NO-ADV";
|
|
} else
|
|
noadv = "";
|
|
rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
|
|
rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric;
|
|
np = &rrt->rrt_info;
|
|
orrt = rtsearch(np);
|
|
if (!orrt) {
|
|
/* Attach the route to the list */
|
|
trace(1, "route: %s/%d: register route "
|
|
"(%s on %s%s)\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen,
|
|
category, ifcp->ifc_name, noadv);
|
|
TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
|
|
} else if (rrt->rrt_index != orrt->rrt_index ||
|
|
rrt->rrt_info.rip6_metric != orrt->rrt_info.rip6_metric) {
|
|
/* replace route */
|
|
TAILQ_INSERT_BEFORE(orrt, rrt, rrt_next);
|
|
TAILQ_REMOVE(&riprt_head, orrt, rrt_next);
|
|
free(orrt);
|
|
|
|
trace(1, "route: %s/%d: update (%s on %s%s)\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen,
|
|
category, ifcp->ifc_name, noadv);
|
|
} else {
|
|
/* Already found */
|
|
if (!again) {
|
|
trace(1, "route: %s/%d: "
|
|
"already registered (%s on %s%s)\n",
|
|
inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, category,
|
|
ifcp->ifc_name, noadv);
|
|
}
|
|
free(rrt);
|
|
}
|
|
}
|
|
}
|
|
#undef P2PADVERT_NETWORK
|
|
#undef P2PADVERT_ADDR
|
|
#undef P2PADVERT_DEST
|
|
#undef P2PADVERT_MAX
|
|
}
|
|
|
|
static int
|
|
getifmtu(int ifindex)
|
|
{
|
|
int mib[6];
|
|
char *buf;
|
|
size_t msize;
|
|
struct if_msghdr *ifm;
|
|
int mtu;
|
|
|
|
mib[0] = CTL_NET;
|
|
mib[1] = PF_ROUTE;
|
|
mib[2] = 0;
|
|
mib[3] = AF_INET6;
|
|
mib[4] = NET_RT_IFLIST;
|
|
mib[5] = ifindex;
|
|
if (sysctl(mib, nitems(mib), NULL, &msize, NULL, 0) < 0) {
|
|
fatal("sysctl estimate NET_RT_IFLIST");
|
|
/*NOTREACHED*/
|
|
}
|
|
if ((buf = malloc(msize)) == NULL) {
|
|
fatal("malloc");
|
|
/*NOTREACHED*/
|
|
}
|
|
if (sysctl(mib, nitems(mib), buf, &msize, NULL, 0) < 0) {
|
|
fatal("sysctl NET_RT_IFLIST");
|
|
/*NOTREACHED*/
|
|
}
|
|
ifm = (struct if_msghdr *)(void *)buf;
|
|
mtu = ifm->ifm_data.ifi_mtu;
|
|
if (ifindex != ifm->ifm_index) {
|
|
fatal("ifindex does not match with ifm_index");
|
|
/*NOTREACHED*/
|
|
}
|
|
free(buf);
|
|
return mtu;
|
|
}
|
|
|
|
static const char *
|
|
rttypes(struct rt_msghdr *rtm)
|
|
{
|
|
#define RTTYPE(s, f) \
|
|
do { \
|
|
if (rtm->rtm_type == (f)) \
|
|
return (s); \
|
|
} while (0)
|
|
RTTYPE("ADD", RTM_ADD);
|
|
RTTYPE("DELETE", RTM_DELETE);
|
|
RTTYPE("CHANGE", RTM_CHANGE);
|
|
RTTYPE("GET", RTM_GET);
|
|
RTTYPE("LOSING", RTM_LOSING);
|
|
RTTYPE("REDIRECT", RTM_REDIRECT);
|
|
RTTYPE("MISS", RTM_MISS);
|
|
RTTYPE("LOCK", RTM_LOCK);
|
|
RTTYPE("NEWADDR", RTM_NEWADDR);
|
|
RTTYPE("DELADDR", RTM_DELADDR);
|
|
RTTYPE("IFINFO", RTM_IFINFO);
|
|
#ifdef RTM_OIFINFO
|
|
RTTYPE("OIFINFO", RTM_OIFINFO);
|
|
#endif
|
|
#ifdef RTM_IFANNOUNCE
|
|
RTTYPE("IFANNOUNCE", RTM_IFANNOUNCE);
|
|
#endif
|
|
#ifdef RTM_NEWMADDR
|
|
RTTYPE("NEWMADDR", RTM_NEWMADDR);
|
|
#endif
|
|
#ifdef RTM_DELMADDR
|
|
RTTYPE("DELMADDR", RTM_DELMADDR);
|
|
#endif
|
|
#undef RTTYPE
|
|
return NULL;
|
|
}
|
|
|
|
static const char *
|
|
rtflags(struct rt_msghdr *rtm)
|
|
{
|
|
static char buf[BUFSIZ];
|
|
|
|
/*
|
|
* letter conflict should be okay. painful when *BSD diverges...
|
|
*/
|
|
strlcpy(buf, "", sizeof(buf));
|
|
#define RTFLAG(s, f) \
|
|
do { \
|
|
if (rtm->rtm_flags & (f)) \
|
|
strlcat(buf, (s), sizeof(buf)); \
|
|
} while (0)
|
|
RTFLAG("U", RTF_UP);
|
|
RTFLAG("G", RTF_GATEWAY);
|
|
RTFLAG("H", RTF_HOST);
|
|
RTFLAG("R", RTF_REJECT);
|
|
RTFLAG("D", RTF_DYNAMIC);
|
|
RTFLAG("M", RTF_MODIFIED);
|
|
RTFLAG("d", RTF_DONE);
|
|
#ifdef RTF_MASK
|
|
RTFLAG("m", RTF_MASK);
|
|
#endif
|
|
#ifdef RTF_CLONED
|
|
RTFLAG("c", RTF_CLONED);
|
|
#endif
|
|
RTFLAG("X", RTF_XRESOLVE);
|
|
#ifdef RTF_LLINFO
|
|
RTFLAG("L", RTF_LLINFO);
|
|
#endif
|
|
RTFLAG("S", RTF_STATIC);
|
|
RTFLAG("B", RTF_BLACKHOLE);
|
|
#ifdef RTF_PROTO3
|
|
RTFLAG("3", RTF_PROTO3);
|
|
#endif
|
|
RTFLAG("2", RTF_PROTO2);
|
|
RTFLAG("1", RTF_PROTO1);
|
|
#ifdef RTF_BROADCAST
|
|
RTFLAG("b", RTF_BROADCAST);
|
|
#endif
|
|
#ifdef RTF_DEFAULT
|
|
RTFLAG("d", RTF_DEFAULT);
|
|
#endif
|
|
#ifdef RTF_ISAROUTER
|
|
RTFLAG("r", RTF_ISAROUTER);
|
|
#endif
|
|
#ifdef RTF_TUNNEL
|
|
RTFLAG("T", RTF_TUNNEL);
|
|
#endif
|
|
#ifdef RTF_AUTH
|
|
RTFLAG("A", RTF_AUTH);
|
|
#endif
|
|
#ifdef RTF_CRYPT
|
|
RTFLAG("E", RTF_CRYPT);
|
|
#endif
|
|
#undef RTFLAG
|
|
return buf;
|
|
}
|
|
|
|
static const char *
|
|
ifflags(int flags)
|
|
{
|
|
static char buf[BUFSIZ];
|
|
|
|
strlcpy(buf, "", sizeof(buf));
|
|
#define IFFLAG(s, f) \
|
|
do { \
|
|
if (flags & (f)) { \
|
|
if (buf[0]) \
|
|
strlcat(buf, ",", sizeof(buf)); \
|
|
strlcat(buf, (s), sizeof(buf)); \
|
|
} \
|
|
} while (0)
|
|
IFFLAG("UP", IFF_UP);
|
|
IFFLAG("BROADCAST", IFF_BROADCAST);
|
|
IFFLAG("DEBUG", IFF_DEBUG);
|
|
IFFLAG("LOOPBACK", IFF_LOOPBACK);
|
|
IFFLAG("POINTOPOINT", IFF_POINTOPOINT);
|
|
#ifdef IFF_NOTRAILERS
|
|
IFFLAG("NOTRAILERS", IFF_NOTRAILERS);
|
|
#endif
|
|
IFFLAG("RUNNING", IFF_RUNNING);
|
|
IFFLAG("NOARP", IFF_NOARP);
|
|
IFFLAG("PROMISC", IFF_PROMISC);
|
|
IFFLAG("ALLMULTI", IFF_ALLMULTI);
|
|
IFFLAG("OACTIVE", IFF_OACTIVE);
|
|
IFFLAG("SIMPLEX", IFF_SIMPLEX);
|
|
IFFLAG("LINK0", IFF_LINK0);
|
|
IFFLAG("LINK1", IFF_LINK1);
|
|
IFFLAG("LINK2", IFF_LINK2);
|
|
IFFLAG("MULTICAST", IFF_MULTICAST);
|
|
#undef IFFLAG
|
|
return buf;
|
|
}
|
|
|
|
static void
|
|
krtread(int again)
|
|
{
|
|
int mib[6];
|
|
size_t msize;
|
|
char *buf, *p, *lim;
|
|
struct rt_msghdr *rtm;
|
|
int retry;
|
|
const char *errmsg;
|
|
|
|
retry = 0;
|
|
buf = NULL;
|
|
mib[0] = CTL_NET;
|
|
mib[1] = PF_ROUTE;
|
|
mib[2] = 0;
|
|
mib[3] = AF_INET6; /* Address family */
|
|
mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */
|
|
mib[5] = 0; /* No flags */
|
|
do {
|
|
if (retry)
|
|
sleep(1);
|
|
retry++;
|
|
errmsg = NULL;
|
|
if (buf) {
|
|
free(buf);
|
|
buf = NULL;
|
|
}
|
|
if (sysctl(mib, nitems(mib), NULL, &msize, NULL, 0) < 0) {
|
|
errmsg = "sysctl estimate";
|
|
continue;
|
|
}
|
|
if ((buf = malloc(msize)) == NULL) {
|
|
errmsg = "malloc";
|
|
continue;
|
|
}
|
|
if (sysctl(mib, nitems(mib), buf, &msize, NULL, 0) < 0) {
|
|
errmsg = "sysctl NET_RT_DUMP";
|
|
continue;
|
|
}
|
|
} while (retry < RT_DUMP_MAXRETRY && errmsg != NULL);
|
|
if (errmsg) {
|
|
fatal("%s (with %d retries, msize=%lu)", errmsg, retry,
|
|
(u_long)msize);
|
|
/*NOTREACHED*/
|
|
} else if (1 < retry)
|
|
syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry);
|
|
|
|
lim = buf + msize;
|
|
for (p = buf; p < lim; p += rtm->rtm_msglen) {
|
|
rtm = (struct rt_msghdr *)(void *)p;
|
|
rt_entry(rtm, again);
|
|
}
|
|
free(buf);
|
|
}
|
|
|
|
static void
|
|
rt_entry(struct rt_msghdr *rtm, int again)
|
|
{
|
|
struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask;
|
|
struct sockaddr_in6 *sin6_genmask, *sin6_ifp;
|
|
char *rtmp, *ifname = NULL;
|
|
struct riprt *rrt, *orrt;
|
|
struct netinfo6 *np;
|
|
int ifindex;
|
|
|
|
sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = 0;
|
|
if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags &
|
|
(RTF_XRESOLVE|RTF_BLACKHOLE)) {
|
|
return; /* not interested in the link route */
|
|
}
|
|
/* do not look at cloned routes */
|
|
#ifdef RTF_WASCLONED
|
|
if (rtm->rtm_flags & RTF_WASCLONED)
|
|
return;
|
|
#endif
|
|
#ifdef RTF_CLONED
|
|
if (rtm->rtm_flags & RTF_CLONED)
|
|
return;
|
|
#endif
|
|
/* XXX: Ignore connected routes. */
|
|
if (!(rtm->rtm_flags & (RTF_GATEWAY|RTF_HOST|RTF_STATIC)))
|
|
return;
|
|
/*
|
|
* do not look at dynamic routes.
|
|
* netbsd/openbsd cloned routes have UGHD.
|
|
*/
|
|
if (rtm->rtm_flags & RTF_DYNAMIC)
|
|
return;
|
|
rtmp = (char *)(rtm + 1);
|
|
/* Destination */
|
|
if ((rtm->rtm_addrs & RTA_DST) == 0)
|
|
return; /* ignore routes without destination address */
|
|
sin6_dst = (struct sockaddr_in6 *)(void *)rtmp;
|
|
rtmp += ROUNDUP(sin6_dst->sin6_len);
|
|
if (rtm->rtm_addrs & RTA_GATEWAY) {
|
|
sin6_gw = (struct sockaddr_in6 *)(void *)rtmp;
|
|
rtmp += ROUNDUP(sin6_gw->sin6_len);
|
|
}
|
|
if (rtm->rtm_addrs & RTA_NETMASK) {
|
|
sin6_mask = (struct sockaddr_in6 *)(void *)rtmp;
|
|
rtmp += ROUNDUP(sin6_mask->sin6_len);
|
|
}
|
|
if (rtm->rtm_addrs & RTA_GENMASK) {
|
|
sin6_genmask = (struct sockaddr_in6 *)(void *)rtmp;
|
|
rtmp += ROUNDUP(sin6_genmask->sin6_len);
|
|
}
|
|
if (rtm->rtm_addrs & RTA_IFP) {
|
|
sin6_ifp = (struct sockaddr_in6 *)(void *)rtmp;
|
|
rtmp += ROUNDUP(sin6_ifp->sin6_len);
|
|
}
|
|
|
|
/* Destination */
|
|
if (sin6_dst->sin6_family != AF_INET6)
|
|
return;
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr))
|
|
return; /* Link-local */
|
|
if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback))
|
|
return; /* Loopback */
|
|
if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr))
|
|
return;
|
|
|
|
if ((rrt = MALLOC(struct riprt)) == NULL) {
|
|
fatal("malloc: struct riprt");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(rrt, 0, sizeof(*rrt));
|
|
np = &rrt->rrt_info;
|
|
rrt->rrt_same = NULL;
|
|
rrt->rrt_t = time(NULL);
|
|
if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC))
|
|
rrt->rrt_t = 0; /* Don't age static routes */
|
|
if (rtm->rtm_flags & Pflag)
|
|
rrt->rrt_t = 0; /* Don't age PROTO[123] routes */
|
|
if ((rtm->rtm_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST)
|
|
rrt->rrt_t = 0; /* Don't age non-gateway host routes */
|
|
np->rip6_tag = 0;
|
|
np->rip6_metric = rtm->rtm_rmx.rmx_hopcount;
|
|
if (np->rip6_metric < 1)
|
|
np->rip6_metric = 1;
|
|
rrt->rrt_flags = rtm->rtm_flags;
|
|
np->rip6_dest = sin6_dst->sin6_addr;
|
|
|
|
/* Mask or plen */
|
|
if (rtm->rtm_flags & RTF_HOST)
|
|
np->rip6_plen = 128; /* Host route */
|
|
else if (sin6_mask)
|
|
np->rip6_plen = sin6mask2len(sin6_mask);
|
|
else
|
|
np->rip6_plen = 0;
|
|
|
|
orrt = rtsearch(np);
|
|
if (orrt && orrt->rrt_info.rip6_metric != HOPCNT_INFINITY6) {
|
|
/* Already found */
|
|
if (!again) {
|
|
trace(1, "route: %s/%d flags %s: already registered\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen,
|
|
rtflags(rtm));
|
|
}
|
|
free(rrt);
|
|
return;
|
|
}
|
|
/* Gateway */
|
|
if (!sin6_gw)
|
|
memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
|
|
else {
|
|
if (sin6_gw->sin6_family == AF_INET6)
|
|
rrt->rrt_gw = sin6_gw->sin6_addr;
|
|
else if (sin6_gw->sin6_family == AF_LINK) {
|
|
/* XXX in case ppp link? */
|
|
rrt->rrt_gw = in6addr_loopback;
|
|
} else
|
|
memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
|
|
}
|
|
trace(1, "route: %s/%d flags %s",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm));
|
|
trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw));
|
|
|
|
/* Interface */
|
|
ifindex = rtm->rtm_index;
|
|
if ((unsigned int)ifindex < nindex2ifc && index2ifc[ifindex])
|
|
ifname = index2ifc[ifindex]->ifc_name;
|
|
else {
|
|
trace(1, " not configured\n");
|
|
free(rrt);
|
|
return;
|
|
}
|
|
trace(1, " if %s sock %d", ifname, ifindex);
|
|
rrt->rrt_index = ifindex;
|
|
|
|
trace(1, "\n");
|
|
|
|
/* Check gateway */
|
|
if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) &&
|
|
!IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw) &&
|
|
(rrt->rrt_flags & RTF_LOCAL) == 0) {
|
|
trace(0, "***** Gateway %s is not a link-local address.\n",
|
|
inet6_n2p(&rrt->rrt_gw));
|
|
trace(0, "***** dest(%s) if(%s) -- Not optimized.\n",
|
|
inet6_n2p(&rrt->rrt_info.rip6_dest), ifname);
|
|
rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR;
|
|
}
|
|
|
|
/* Put it to the route list */
|
|
if (orrt && orrt->rrt_info.rip6_metric == HOPCNT_INFINITY6) {
|
|
/* replace route list */
|
|
TAILQ_INSERT_BEFORE(orrt, rrt, rrt_next);
|
|
TAILQ_REMOVE(&riprt_head, orrt, rrt_next);
|
|
|
|
trace(1, "route: %s/%d flags %s: replace new route\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen,
|
|
rtflags(rtm));
|
|
free(orrt);
|
|
} else
|
|
TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
|
|
}
|
|
|
|
static int
|
|
addroute(struct riprt *rrt,
|
|
const struct in6_addr *gw,
|
|
struct ifc *ifcp)
|
|
{
|
|
struct netinfo6 *np;
|
|
u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ];
|
|
struct rt_msghdr *rtm;
|
|
struct sockaddr_in6 *sin6;
|
|
int len;
|
|
|
|
np = &rrt->rrt_info;
|
|
inet_ntop(AF_INET6, (const void *)gw, (char *)buf1, sizeof(buf1));
|
|
inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2));
|
|
tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1,
|
|
np->rip6_metric - 1, buf2);
|
|
if (rtlog)
|
|
fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(),
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1,
|
|
np->rip6_metric - 1, buf2);
|
|
if (nflag)
|
|
return 0;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
rtm = (struct rt_msghdr *)(void *)buf;
|
|
rtm->rtm_type = RTM_ADD;
|
|
rtm->rtm_version = RTM_VERSION;
|
|
rtm->rtm_seq = ++seq;
|
|
rtm->rtm_pid = pid;
|
|
rtm->rtm_flags = rrt->rrt_flags;
|
|
rtm->rtm_flags |= Qflag;
|
|
rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
|
|
rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1;
|
|
rtm->rtm_inits = RTV_HOPCOUNT;
|
|
sin6 = (struct sockaddr_in6 *)(void *)&buf[sizeof(struct rt_msghdr)];
|
|
/* Destination */
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = np->rip6_dest;
|
|
sin6 = (struct sockaddr_in6 *)(void *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
|
|
/* Gateway */
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = *gw;
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
|
|
sin6->sin6_scope_id = ifcp->ifc_index;
|
|
sin6 = (struct sockaddr_in6 *)(void *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
|
|
/* Netmask */
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = *(plen2mask(np->rip6_plen));
|
|
sin6 = (struct sockaddr_in6 *)(void *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
|
|
|
|
len = (char *)sin6 - (char *)buf;
|
|
rtm->rtm_msglen = len;
|
|
if (write(rtsock, buf, len) > 0)
|
|
return 0;
|
|
|
|
if (errno == EEXIST) {
|
|
trace(0, "ADD: Route already exists %s/%d gw %s\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1);
|
|
if (rtlog)
|
|
fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1);
|
|
} else {
|
|
trace(0, "Can not write to rtsock (addroute): %s\n",
|
|
strerror(errno));
|
|
if (rtlog)
|
|
fprintf(rtlog, "\tCan not write to rtsock: %s\n",
|
|
strerror(errno));
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
delroute(struct netinfo6 *np, struct in6_addr *gw)
|
|
{
|
|
u_char buf[BUFSIZ], buf2[BUFSIZ];
|
|
struct rt_msghdr *rtm;
|
|
struct sockaddr_in6 *sin6;
|
|
int len;
|
|
|
|
inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2));
|
|
tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest),
|
|
np->rip6_plen, buf2);
|
|
if (rtlog)
|
|
fprintf(rtlog, "%s: DEL: %s/%d gw %s\n",
|
|
hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
|
|
if (nflag)
|
|
return 0;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
rtm = (struct rt_msghdr *)(void *)buf;
|
|
rtm->rtm_type = RTM_DELETE;
|
|
rtm->rtm_version = RTM_VERSION;
|
|
rtm->rtm_seq = ++seq;
|
|
rtm->rtm_pid = pid;
|
|
rtm->rtm_flags = RTF_UP | RTF_GATEWAY;
|
|
rtm->rtm_flags |= Qflag;
|
|
if (np->rip6_plen == sizeof(struct in6_addr) * 8)
|
|
rtm->rtm_flags |= RTF_HOST;
|
|
rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
|
|
sin6 = (struct sockaddr_in6 *)(void *)&buf[sizeof(struct rt_msghdr)];
|
|
/* Destination */
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = np->rip6_dest;
|
|
sin6 = (struct sockaddr_in6 *)(void *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
|
|
/* Gateway */
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = *gw;
|
|
sin6 = (struct sockaddr_in6 *)(void *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
|
|
/* Netmask */
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = *(plen2mask(np->rip6_plen));
|
|
sin6 = (struct sockaddr_in6 *)(void *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
|
|
|
|
len = (char *)sin6 - (char *)buf;
|
|
rtm->rtm_msglen = len;
|
|
if (write(rtsock, buf, len) >= 0)
|
|
return 0;
|
|
|
|
if (errno == ESRCH) {
|
|
trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
|
|
if (rtlog)
|
|
fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n",
|
|
inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
|
|
} else {
|
|
trace(0, "Can not write to rtsock (delroute): %s\n",
|
|
strerror(errno));
|
|
if (rtlog)
|
|
fprintf(rtlog, "\tCan not write to rtsock: %s\n",
|
|
strerror(errno));
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
#if 0
|
|
static struct in6_addr *
|
|
getroute(struct netinfo6 *np, struct in6_addr *gw)
|
|
{
|
|
u_char buf[BUFSIZ];
|
|
int myseq;
|
|
int len;
|
|
struct rt_msghdr *rtm;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
rtm = (struct rt_msghdr *)(void *)buf;
|
|
len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6);
|
|
memset(rtm, 0, len);
|
|
rtm->rtm_type = RTM_GET;
|
|
rtm->rtm_version = RTM_VERSION;
|
|
myseq = ++seq;
|
|
rtm->rtm_seq = myseq;
|
|
rtm->rtm_addrs = RTA_DST;
|
|
rtm->rtm_msglen = len;
|
|
sin6 = (struct sockaddr_in6 *)(void *)&buf[sizeof(struct rt_msghdr)];
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = np->rip6_dest;
|
|
if (write(rtsock, buf, len) < 0) {
|
|
if (errno == ESRCH) /* No such route found */
|
|
return NULL;
|
|
perror("write to rtsock");
|
|
exit(1);
|
|
}
|
|
do {
|
|
if ((len = read(rtsock, buf, sizeof(buf))) < 0) {
|
|
perror("read from rtsock");
|
|
exit(1);
|
|
}
|
|
rtm = (struct rt_msghdr *)(void *)buf;
|
|
} while (rtm->rtm_type != RTM_GET || rtm->rtm_seq != myseq ||
|
|
rtm->rtm_pid != pid);
|
|
sin6 = (struct sockaddr_in6 *)(void *)&buf[sizeof(struct rt_msghdr)];
|
|
if (rtm->rtm_addrs & RTA_DST) {
|
|
sin6 = (struct sockaddr_in6 *)(void *)
|
|
((char *)sin6 + ROUNDUP(sin6->sin6_len));
|
|
}
|
|
if (rtm->rtm_addrs & RTA_GATEWAY) {
|
|
*gw = sin6->sin6_addr;
|
|
return gw;
|
|
}
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
static const char *
|
|
inet6_n2p(const struct in6_addr *p)
|
|
{
|
|
static char buf[BUFSIZ];
|
|
|
|
return inet_ntop(AF_INET6, (const void *)p, buf, sizeof(buf));
|
|
}
|
|
|
|
static void
|
|
ifrtdump(int sig)
|
|
{
|
|
|
|
ifdump(sig);
|
|
rtdump(sig);
|
|
}
|
|
|
|
static void
|
|
ifdump(int sig)
|
|
{
|
|
struct ifc *ifcp;
|
|
FILE *dump;
|
|
int nifc = 0;
|
|
|
|
if (sig == 0)
|
|
dump = stderr;
|
|
else
|
|
if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL)
|
|
dump = stderr;
|
|
|
|
fprintf(dump, "%s: Interface Table Dump\n", hms());
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next)
|
|
nifc++;
|
|
fprintf(dump, " Number of interfaces: %d\n", nifc);
|
|
|
|
fprintf(dump, " advertising interfaces:\n");
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if ((ifcp->ifc_flags & IFF_UP) == 0)
|
|
continue;
|
|
if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
|
|
continue;
|
|
ifdump0(dump, ifcp);
|
|
}
|
|
fprintf(dump, "\n");
|
|
fprintf(dump, " non-advertising interfaces:\n");
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if ((ifcp->ifc_flags & IFF_UP) &&
|
|
(iff_find(ifcp, IFIL_TYPE_N) == NULL))
|
|
continue;
|
|
ifdump0(dump, ifcp);
|
|
}
|
|
fprintf(dump, "\n");
|
|
if (dump != stderr)
|
|
fclose(dump);
|
|
}
|
|
|
|
static void
|
|
ifdump0(FILE *dump, const struct ifc *ifcp)
|
|
{
|
|
struct ifac *ifac;
|
|
struct iff *iffp;
|
|
char buf[BUFSIZ];
|
|
const char *ft;
|
|
int addr;
|
|
|
|
fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n",
|
|
ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags),
|
|
inet6_n2p(&ifcp->ifc_mylladdr),
|
|
ifcp->ifc_mtu, ifcp->ifc_metric);
|
|
TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
|
|
if (ifcp->ifc_flags & IFF_POINTOPOINT) {
|
|
inet_ntop(AF_INET6, (void *)&ifac->ifac_raddr,
|
|
buf, sizeof(buf));
|
|
fprintf(dump, "\t%s/%d -- %s\n",
|
|
inet6_n2p(&ifac->ifac_addr),
|
|
ifac->ifac_plen, buf);
|
|
} else {
|
|
fprintf(dump, "\t%s/%d\n",
|
|
inet6_n2p(&ifac->ifac_addr),
|
|
ifac->ifac_plen);
|
|
}
|
|
}
|
|
|
|
fprintf(dump, "\tFilter:\n");
|
|
TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
|
|
addr = 0;
|
|
switch (iffp->iff_type) {
|
|
case IFIL_TYPE_A:
|
|
ft = "Aggregate"; addr++; break;
|
|
case IFIL_TYPE_N:
|
|
ft = "No-use"; break;
|
|
case IFIL_TYPE_O:
|
|
ft = "Advertise-only"; addr++; break;
|
|
case IFIL_TYPE_T:
|
|
ft = "Default-only"; break;
|
|
case IFIL_TYPE_L:
|
|
ft = "Listen-only"; addr++; break;
|
|
default:
|
|
snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type);
|
|
ft = buf;
|
|
addr++;
|
|
break;
|
|
}
|
|
fprintf(dump, "\t\t%s", ft);
|
|
if (addr)
|
|
fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr),
|
|
iffp->iff_plen);
|
|
fprintf(dump, "\n");
|
|
}
|
|
fprintf(dump, "\n");
|
|
}
|
|
|
|
static void
|
|
rtdump(int sig)
|
|
{
|
|
struct riprt *rrt;
|
|
char buf[BUFSIZ];
|
|
FILE *dump;
|
|
time_t t, age;
|
|
|
|
if (sig == 0)
|
|
dump = stderr;
|
|
else
|
|
if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL)
|
|
dump = stderr;
|
|
|
|
t = time(NULL);
|
|
fprintf(dump, "\n%s: Routing Table Dump\n", hms());
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
if (rrt->rrt_t == 0)
|
|
age = 0;
|
|
else
|
|
age = t - rrt->rrt_t;
|
|
inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest,
|
|
buf, sizeof(buf));
|
|
fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)",
|
|
buf, rrt->rrt_info.rip6_plen, rrt->rrt_index,
|
|
index2ifc[rrt->rrt_index]->ifc_name,
|
|
inet6_n2p(&rrt->rrt_gw),
|
|
rrt->rrt_info.rip6_metric, (long)age);
|
|
if (rrt->rrt_info.rip6_tag) {
|
|
fprintf(dump, " tag(0x%04x)",
|
|
ntohs(rrt->rrt_info.rip6_tag) & 0xffff);
|
|
}
|
|
if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)
|
|
fprintf(dump, " NOT-LL");
|
|
if (rrt->rrt_rflags & RRTF_NOADVERTISE)
|
|
fprintf(dump, " NO-ADV");
|
|
fprintf(dump, "\n");
|
|
}
|
|
fprintf(dump, "\n");
|
|
if (dump != stderr)
|
|
fclose(dump);
|
|
}
|
|
|
|
/*
|
|
* Parse the -A (and -O) options and put corresponding filter object to the
|
|
* specified interface structures. Each of the -A/O option has the following
|
|
* syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate)
|
|
* -O 5f09:c400::/32,ef0,ef1 (only when match)
|
|
*/
|
|
static void
|
|
filterconfig(void)
|
|
{
|
|
int i;
|
|
char *p, *ap, *iflp, *ifname, *ep;
|
|
struct iff iff, *iffp;
|
|
struct ifc *ifcp;
|
|
struct riprt *rrt;
|
|
#if 0
|
|
struct in6_addr gw;
|
|
#endif
|
|
u_long plen;
|
|
|
|
for (i = 0; i < nfilter; i++) {
|
|
ap = filter[i];
|
|
iflp = NULL;
|
|
iffp = ⇔
|
|
memset(iffp, 0, sizeof(*iffp));
|
|
if (filtertype[i] == 'N' || filtertype[i] == 'T') {
|
|
iflp = ap;
|
|
goto ifonly;
|
|
}
|
|
if ((p = strchr(ap, ',')) != NULL) {
|
|
*p++ = '\0';
|
|
iflp = p;
|
|
}
|
|
if ((p = strchr(ap, '/')) == NULL) {
|
|
fatal("no prefixlen specified for '%s'", ap);
|
|
/*NOTREACHED*/
|
|
}
|
|
*p++ = '\0';
|
|
if (inet_pton(AF_INET6, ap, &iffp->iff_addr) != 1) {
|
|
fatal("invalid prefix specified for '%s'", ap);
|
|
/*NOTREACHED*/
|
|
}
|
|
errno = 0;
|
|
ep = NULL;
|
|
plen = strtoul(p, &ep, 10);
|
|
if (errno || !*p || *ep || plen > sizeof(iffp->iff_addr) * 8) {
|
|
fatal("invalid prefix length specified for '%s'", ap);
|
|
/*NOTREACHED*/
|
|
}
|
|
iffp->iff_plen = plen;
|
|
applyplen(&iffp->iff_addr, iffp->iff_plen);
|
|
ifonly:
|
|
iffp->iff_type = filtertype[i];
|
|
if (iflp == NULL || *iflp == '\0') {
|
|
fatal("no interface specified for '%s'", ap);
|
|
/*NOTREACHED*/
|
|
}
|
|
/* parse the interface listing portion */
|
|
while (iflp) {
|
|
ifname = iflp;
|
|
if ((iflp = strchr(iflp, ',')) != NULL)
|
|
*iflp++ = '\0';
|
|
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if (fnmatch(ifname, ifcp->ifc_name, 0) != 0)
|
|
continue;
|
|
|
|
iffp = malloc(sizeof(*iffp));
|
|
if (iffp == NULL) {
|
|
fatal("malloc of iff");
|
|
/*NOTREACHED*/
|
|
}
|
|
memcpy(iffp, &iff, sizeof(*iffp));
|
|
#if 0
|
|
syslog(LOG_INFO, "Add filter: type %d, ifname %s.", iffp->iff_type, ifname);
|
|
#endif
|
|
TAILQ_INSERT_HEAD(&ifcp->ifc_iff_head, iffp, iff_next);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* -A: aggregate configuration.
|
|
*/
|
|
if (filtertype[i] != IFIL_TYPE_A)
|
|
continue;
|
|
/* put the aggregate to the kernel routing table */
|
|
rrt = (struct riprt *)malloc(sizeof(struct riprt));
|
|
if (rrt == NULL) {
|
|
fatal("malloc: rrt");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(rrt, 0, sizeof(struct riprt));
|
|
rrt->rrt_info.rip6_dest = iff.iff_addr;
|
|
rrt->rrt_info.rip6_plen = iff.iff_plen;
|
|
rrt->rrt_info.rip6_metric = 1;
|
|
rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
|
|
rrt->rrt_gw = in6addr_loopback;
|
|
rrt->rrt_flags = RTF_UP | RTF_REJECT;
|
|
rrt->rrt_rflags = RRTF_AGGREGATE;
|
|
rrt->rrt_t = 0;
|
|
rrt->rrt_index = loopifcp->ifc_index;
|
|
#if 0
|
|
if (getroute(&rrt->rrt_info, &gw)) {
|
|
#if 0
|
|
/*
|
|
* When the address has already been registered in the
|
|
* kernel routing table, it should be removed
|
|
*/
|
|
delroute(&rrt->rrt_info, &gw);
|
|
#else
|
|
/* it is safer behavior */
|
|
errno = EINVAL;
|
|
fatal("%s/%u already in routing table, "
|
|
"cannot aggregate",
|
|
inet6_n2p(&rrt->rrt_info.rip6_dest),
|
|
rrt->rrt_info.rip6_plen);
|
|
/*NOTREACHED*/
|
|
#endif
|
|
}
|
|
#endif
|
|
/* Put the route to the list */
|
|
TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
|
|
trace(1, "Aggregate: %s/%d for %s\n",
|
|
inet6_n2p(&iff.iff_addr), iff.iff_plen,
|
|
loopifcp->ifc_name);
|
|
/* Add this route to the kernel */
|
|
if (nflag) /* do not modify kernel routing table */
|
|
continue;
|
|
addroute(rrt, &in6addr_loopback, loopifcp);
|
|
}
|
|
}
|
|
|
|
/***************** utility functions *****************/
|
|
|
|
/*
|
|
* Returns a pointer to ifac whose address and prefix length matches
|
|
* with the address and prefix length specified in the arguments.
|
|
*/
|
|
static struct ifac *
|
|
ifa_match(const struct ifc *ifcp,
|
|
const struct in6_addr *ia,
|
|
int plen)
|
|
{
|
|
struct ifac *ifac;
|
|
|
|
TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
|
|
if (IN6_ARE_ADDR_EQUAL(&ifac->ifac_addr, ia) &&
|
|
ifac->ifac_plen == plen)
|
|
break;
|
|
}
|
|
|
|
return (ifac);
|
|
}
|
|
|
|
/*
|
|
* Return a pointer to riprt structure whose address and prefix length
|
|
* matches with the address and prefix length found in the argument.
|
|
* Note: This is not a rtalloc(). Therefore exact match is necessary.
|
|
*/
|
|
static struct riprt *
|
|
rtsearch(struct netinfo6 *np)
|
|
{
|
|
struct riprt *rrt;
|
|
|
|
TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
|
|
if (rrt->rrt_info.rip6_plen == np->rip6_plen &&
|
|
IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
|
|
&np->rip6_dest))
|
|
break;
|
|
}
|
|
|
|
return (rrt);
|
|
}
|
|
|
|
static int
|
|
sin6mask2len(const struct sockaddr_in6 *sin6)
|
|
{
|
|
|
|
return mask2len(&sin6->sin6_addr,
|
|
sin6->sin6_len - offsetof(struct sockaddr_in6, sin6_addr));
|
|
}
|
|
|
|
static int
|
|
mask2len(const struct in6_addr *addr, int lenlim)
|
|
{
|
|
int i = 0, j;
|
|
const u_char *p = (const u_char *)addr;
|
|
|
|
for (j = 0; j < lenlim; j++, p++) {
|
|
if (*p != 0xff)
|
|
break;
|
|
i += 8;
|
|
}
|
|
if (j < lenlim) {
|
|
switch (*p) {
|
|
#define MASKLEN(m, l) case m: do { i += l; break; } while (0)
|
|
MASKLEN(0xfe, 7); break;
|
|
MASKLEN(0xfc, 6); break;
|
|
MASKLEN(0xf8, 5); break;
|
|
MASKLEN(0xf0, 4); break;
|
|
MASKLEN(0xe0, 3); break;
|
|
MASKLEN(0xc0, 2); break;
|
|
MASKLEN(0x80, 1); break;
|
|
#undef MASKLEN
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static const u_char plent[8] = {
|
|
0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
|
|
};
|
|
|
|
static void
|
|
applyplen(struct in6_addr *ia, int plen)
|
|
{
|
|
u_char *p;
|
|
int i;
|
|
|
|
p = ia->s6_addr;
|
|
for (i = 0; i < 16; i++) {
|
|
if (plen <= 0)
|
|
*p = 0;
|
|
else if (plen < 8)
|
|
*p &= plent[plen];
|
|
p++, plen -= 8;
|
|
}
|
|
}
|
|
|
|
static const int pl2m[9] = {
|
|
0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff
|
|
};
|
|
|
|
static struct in6_addr *
|
|
plen2mask(int n)
|
|
{
|
|
static struct in6_addr ia;
|
|
u_char *p;
|
|
int i;
|
|
|
|
memset(&ia, 0, sizeof(struct in6_addr));
|
|
p = (u_char *)&ia;
|
|
for (i = 0; i < 16; i++, p++, n -= 8) {
|
|
if (n >= 8) {
|
|
*p = 0xff;
|
|
continue;
|
|
}
|
|
*p = pl2m[n];
|
|
break;
|
|
}
|
|
return &ia;
|
|
}
|
|
|
|
static char *
|
|
allocopy(char *p)
|
|
{
|
|
int len = strlen(p) + 1;
|
|
char *q = (char *)malloc(len);
|
|
|
|
if (!q) {
|
|
fatal("malloc");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
strlcpy(q, p, len);
|
|
return q;
|
|
}
|
|
|
|
static char *
|
|
hms(void)
|
|
{
|
|
static char buf[BUFSIZ];
|
|
time_t t;
|
|
struct tm *tm;
|
|
|
|
t = time(NULL);
|
|
if ((tm = localtime(&t)) == 0) {
|
|
fatal("localtime");
|
|
/*NOTREACHED*/
|
|
}
|
|
snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
|
|
tm->tm_sec);
|
|
return buf;
|
|
}
|
|
|
|
#define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */
|
|
|
|
static int
|
|
ripinterval(int timer)
|
|
{
|
|
double r = rand();
|
|
|
|
interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5));
|
|
nextalarm = time(NULL) + interval;
|
|
return interval;
|
|
}
|
|
|
|
#if 0
|
|
static time_t
|
|
ripsuptrig(void)
|
|
{
|
|
time_t t;
|
|
|
|
double r = rand();
|
|
t = (int)(RIP_TRIG_INT6_MIN +
|
|
(RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX));
|
|
sup_trig_update = time(NULL) + t;
|
|
return t;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
fatal(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
char buf[1024];
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
perror(buf);
|
|
if (errno)
|
|
syslog(LOG_ERR, "%s: %s", buf, strerror(errno));
|
|
else
|
|
syslog(LOG_ERR, "%s", buf);
|
|
rtdexit();
|
|
}
|
|
|
|
static void
|
|
tracet(int level, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (level <= dflag) {
|
|
va_start(ap, fmt);
|
|
fprintf(stderr, "%s: ", hms());
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
if (dflag) {
|
|
va_start(ap, fmt);
|
|
if (level > 0)
|
|
vsyslog(LOG_DEBUG, fmt, ap);
|
|
else
|
|
vsyslog(LOG_WARNING, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
}
|
|
|
|
static void
|
|
trace(int level, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (level <= dflag) {
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
if (dflag) {
|
|
va_start(ap, fmt);
|
|
if (level > 0)
|
|
vsyslog(LOG_DEBUG, fmt, ap);
|
|
else
|
|
vsyslog(LOG_WARNING, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
}
|
|
|
|
static struct ifc *
|
|
ifc_find(char *name)
|
|
{
|
|
struct ifc *ifcp;
|
|
|
|
TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
|
|
if (strcmp(name, ifcp->ifc_name) == 0)
|
|
break;
|
|
}
|
|
return (ifcp);
|
|
}
|
|
|
|
static struct iff *
|
|
iff_find(struct ifc *ifcp, int type)
|
|
{
|
|
struct iff *iffp;
|
|
|
|
TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
|
|
if (type == IFIL_TYPE_ANY ||
|
|
type == iffp->iff_type)
|
|
break;
|
|
}
|
|
|
|
return (iffp);
|
|
}
|
|
|
|
static void
|
|
setindex2ifc(int idx, struct ifc *ifcp)
|
|
{
|
|
int n, nsize;
|
|
struct ifc **p;
|
|
|
|
if (!index2ifc) {
|
|
nindex2ifc = 5; /*initial guess*/
|
|
index2ifc = (struct ifc **)
|
|
malloc(sizeof(*index2ifc) * nindex2ifc);
|
|
if (index2ifc == NULL) {
|
|
fatal("malloc");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc);
|
|
}
|
|
n = nindex2ifc;
|
|
for (nsize = nindex2ifc; nsize <= idx; nsize *= 2)
|
|
;
|
|
if (n != nsize) {
|
|
p = (struct ifc **)realloc(index2ifc,
|
|
sizeof(*index2ifc) * nsize);
|
|
if (p == NULL) {
|
|
fatal("realloc");
|
|
/*NOTREACHED*/
|
|
}
|
|
memset(p + n, 0, sizeof(*index2ifc) * (nindex2ifc - n));
|
|
index2ifc = p;
|
|
nindex2ifc = nsize;
|
|
}
|
|
index2ifc[idx] = ifcp;
|
|
}
|