route6d.c revision 243233
162607Sitojun/* $FreeBSD: head/usr.sbin/route6d/route6d.c 243233 2012-11-18 15:48:02Z hrs $ */ 2122677Sume/* $KAME: route6d.c,v 1.104 2003/10/31 00:30:20 itojun Exp $ */ 355163Sshin 455163Sshin/* 555163Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 655163Sshin * All rights reserved. 762607Sitojun * 855163Sshin * Redistribution and use in source and binary forms, with or without 955163Sshin * modification, are permitted provided that the following conditions 1055163Sshin * are met: 1155163Sshin * 1. Redistributions of source code must retain the above copyright 1255163Sshin * notice, this list of conditions and the following disclaimer. 1355163Sshin * 2. Redistributions in binary form must reproduce the above copyright 1455163Sshin * notice, this list of conditions and the following disclaimer in the 1555163Sshin * documentation and/or other materials provided with the distribution. 1655163Sshin * 3. Neither the name of the project nor the names of its contributors 1755163Sshin * may be used to endorse or promote products derived from this software 1855163Sshin * without specific prior written permission. 1962607Sitojun * 2055163Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2155163Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2255163Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2355163Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2455163Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2555163Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2655163Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2755163Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2855163Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2955163Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3055163Sshin * SUCH DAMAGE. 3155163Sshin */ 3255163Sshin 3355163Sshin#ifndef lint 34243232Shrsstatic const char _rcsid[] = "$KAME: route6d.c,v 1.104 2003/10/31 00:30:20 itojun Exp $"; 3555163Sshin#endif 3655163Sshin 3755163Sshin#include <stdio.h> 3855163Sshin 3955163Sshin#include <time.h> 4055163Sshin#include <unistd.h> 41243233Shrs#include <fnmatch.h> 4255163Sshin#include <stdlib.h> 4355163Sshin#include <string.h> 4455163Sshin#include <signal.h> 4555163Sshin#ifdef __STDC__ 4655163Sshin#include <stdarg.h> 4755163Sshin#else 4855163Sshin#include <varargs.h> 4955163Sshin#endif 5055163Sshin#include <syslog.h> 5155163Sshin#include <stddef.h> 5262607Sitojun#include <errno.h> 5355163Sshin#include <err.h> 54119076Sume#ifdef HAVE_POLL_H 55119076Sume#include <poll.h> 56119076Sume#endif 5755163Sshin 5855163Sshin#include <sys/types.h> 5955163Sshin#include <sys/param.h> 6055163Sshin#include <sys/file.h> 6155163Sshin#include <sys/socket.h> 6255163Sshin#include <sys/ioctl.h> 6355163Sshin#include <sys/sysctl.h> 6455163Sshin#include <sys/uio.h> 6555163Sshin#include <net/if.h> 6655163Sshin#include <net/if_var.h> 6762607Sitojun#define _KERNEL 1 6855163Sshin#include <net/route.h> 6962607Sitojun#undef _KERNEL 7055163Sshin#include <netinet/in.h> 7155163Sshin#include <netinet/in_var.h> 7255163Sshin#include <netinet/ip6.h> 7355163Sshin#include <netinet/udp.h> 7455163Sshin#include <netdb.h> 7562607Sitojun#include <ifaddrs.h> 7655163Sshin 7755163Sshin#include <arpa/inet.h> 7855163Sshin 7955163Sshin#include "route6d.h" 8055163Sshin 8155163Sshin#define MAXFILTER 40 82243233Shrs#define RT_DUMP_MAXRETRY 15 8355163Sshin 8455163Sshin#ifdef DEBUG 8555163Sshin#define INIT_INTERVAL6 6 8655163Sshin#else 87119039Sume#define INIT_INTERVAL6 10 /* Wait to submit an initial riprequest */ 8855163Sshin#endif 8955163Sshin 9055163Sshin/* alignment constraint for routing socket */ 9162607Sitojun#define ROUNDUP(a) \ 9255163Sshin ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 9362607Sitojun#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 9455163Sshin 95243232Shrsstruct ifc { /* Configuration of an interface */ 96243232Shrs TAILQ_ENTRY(ifc) ifc_next; 97243232Shrs 98243232Shrs char ifc_name[IFNAMSIZ]; /* if name */ 9955163Sshin int ifc_index; /* if index */ 10055163Sshin int ifc_mtu; /* if mtu */ 10155163Sshin int ifc_metric; /* if metric */ 10278064Sume u_int ifc_flags; /* flags */ 10378064Sume short ifc_cflags; /* IFC_XXX */ 10455163Sshin struct in6_addr ifc_mylladdr; /* my link-local address */ 10555163Sshin struct sockaddr_in6 ifc_ripsin; /* rip multicast address */ 106243232Shrs TAILQ_HEAD(, ifac) ifc_ifac_head; /* list of AF_INET6 addrs */ 107243232Shrs TAILQ_HEAD(, iff) ifc_iff_head; /* list of filters */ 10855163Sshin int ifc_joined; /* joined to ff02::9 */ 10955163Sshin}; 110243232ShrsTAILQ_HEAD(, ifc) ifc_head = TAILQ_HEAD_INITIALIZER(ifc_head); 11155163Sshin 112243232Shrsstruct ifac { /* Adddress associated to an interface */ 113243232Shrs TAILQ_ENTRY(ifac) ifac_next; 114243232Shrs 115243232Shrs struct ifc *ifac_ifc; /* back pointer */ 116243232Shrs struct in6_addr ifac_addr; /* address */ 117243232Shrs struct in6_addr ifac_raddr; /* remote address, valid in p2p */ 118243232Shrs int ifac_scope_id; /* scope id */ 119243232Shrs int ifac_plen; /* prefix length */ 12055163Sshin}; 12155163Sshin 122243232Shrsstruct iff { /* Filters for an interface */ 123243232Shrs TAILQ_ENTRY(iff) iff_next; 124243232Shrs 12555163Sshin int iff_type; 12655163Sshin struct in6_addr iff_addr; 12755163Sshin int iff_plen; 12855163Sshin}; 12955163Sshin 13055163Sshinstruct ifc **index2ifc; 131243232Shrsunsigned int nindex2ifc; 13255163Sshinstruct ifc *loopifcp = NULL; /* pointing to loopback */ 133119076Sume#ifdef HAVE_POLL_H 134119076Sumestruct pollfd set[2]; 135119076Sume#else 136119070Sumefd_set *sockvecp; /* vector to select() for receiving */ 137119070Sumefd_set *recvecp; 138119070Sumeint fdmasks; 139119070Sumeint maxfd; /* maximum fd for select() */ 140119076Sume#endif 14155163Sshinint rtsock; /* the routing socket */ 14255163Sshinint ripsock; /* socket to send/receive RIP datagram */ 14355163Sshin 14455163Sshinstruct rip6 *ripbuf; /* packet buffer for sending */ 14555163Sshin 14655163Sshin/* 14778064Sume * Maintain the routes in a linked list. When the number of the routes 14855163Sshin * grows, somebody would like to introduce a hash based or a radix tree 14978064Sume * based structure. I believe the number of routes handled by RIP is 15055163Sshin * limited and I don't have to manage a complex data structure, however. 15155163Sshin * 15255163Sshin * One of the major drawbacks of the linear linked list is the difficulty 15378064Sume * of representing the relationship between a couple of routes. This may 15455163Sshin * be a significant problem when we have to support route aggregation with 155228990Suqs * suppressing the specifics covered by the aggregate. 15655163Sshin */ 15755163Sshin 158243232Shrsstruct riprt { 159243232Shrs TAILQ_ENTRY(riprt) rrt_next; /* next destination */ 160243232Shrs 16155163Sshin struct riprt *rrt_same; /* same destination - future use */ 16255163Sshin struct netinfo6 rrt_info; /* network info */ 16355163Sshin struct in6_addr rrt_gw; /* gateway */ 16462607Sitojun u_long rrt_flags; /* kernel routing table flags */ 16562607Sitojun u_long rrt_rflags; /* route6d routing table flags */ 16655163Sshin time_t rrt_t; /* when the route validated */ 16755163Sshin int rrt_index; /* ifindex from which this route got */ 16855163Sshin}; 169243232ShrsTAILQ_HEAD(, riprt) riprt_head = TAILQ_HEAD_INITIALIZER(riprt_head); 17055163Sshin 17155163Sshinint dflag = 0; /* debug flag */ 17255163Sshinint qflag = 0; /* quiet flag */ 17355163Sshinint nflag = 0; /* don't update kernel routing table */ 17455163Sshinint aflag = 0; /* age out even the statically defined routes */ 17555163Sshinint hflag = 0; /* don't split horizon */ 17655163Sshinint lflag = 0; /* exchange site local routes */ 177243233Shrsint Pflag = 0; /* don't age out routes with RTF_PROTO[123] */ 178243233Shrsint Qflag = RTF_PROTO2; /* set RTF_PROTO[123] flag to routes by RIPng */ 17955163Sshinint sflag = 0; /* announce static routes w/ split horizon */ 18055163Sshinint Sflag = 0; /* announce static routes to every interface */ 18162607Sitojununsigned long routetag = 0; /* route tag attached on originating case */ 18255163Sshin 18355163Sshinchar *filter[MAXFILTER]; 18455163Sshinint filtertype[MAXFILTER]; 18555163Sshinint nfilter = 0; 18655163Sshin 18755163Sshinpid_t pid; 18855163Sshin 18955163Sshinstruct sockaddr_storage ripsin; 19055163Sshin 19155163Sshinint interval = 1; 19255163Sshintime_t nextalarm = 0; 19355163Sshintime_t sup_trig_update = 0; 19455163Sshin 19555163SshinFILE *rtlog = NULL; 19655163Sshin 19755163Sshinint logopened = 0; 19855163Sshin 199119085Sumestatic int seq = 0; 20055163Sshin 20178064Sumevolatile sig_atomic_t seenalrm; 20278064Sumevolatile sig_atomic_t seenquit; 20378064Sumevolatile sig_atomic_t seenusr1; 20478064Sume 20562607Sitojun#define RRTF_AGGREGATE 0x08000000 20662607Sitojun#define RRTF_NOADVERTISE 0x10000000 20762607Sitojun#define RRTF_NH_NOT_LLADDR 0x20000000 20862607Sitojun#define RRTF_SENDANYWAY 0x40000000 20962607Sitojun#define RRTF_CHANGED 0x80000000 21055163Sshin 211173412Skevloint main(int, char **); 212173412Skevlovoid sighandler(int); 213173412Skevlovoid ripalarm(void); 214173412Skevlovoid riprecv(void); 215173412Skevlovoid ripsend(struct ifc *, struct sockaddr_in6 *, int); 216173412Skevloint out_filter(struct riprt *, struct ifc *); 217173412Skevlovoid init(void); 218173412Skevlovoid sockopt(struct ifc *); 219173412Skevlovoid ifconfig(void); 220243232Shrsint ifconfig1(const char *, const struct sockaddr *, struct ifc *, int); 221173412Skevlovoid rtrecv(void); 222173412Skevloint rt_del(const struct sockaddr_in6 *, const struct sockaddr_in6 *, 223173412Skevlo const struct sockaddr_in6 *); 224173412Skevloint rt_deladdr(struct ifc *, const struct sockaddr_in6 *, 225173412Skevlo const struct sockaddr_in6 *); 226173412Skevlovoid filterconfig(void); 227173412Skevloint getifmtu(int); 228173412Skevloconst char *rttypes(struct rt_msghdr *); 229173412Skevloconst char *rtflags(struct rt_msghdr *); 230173412Skevloconst char *ifflags(int); 231173412Skevloint ifrt(struct ifc *, int); 232173412Skevlovoid ifrt_p2p(struct ifc *, int); 233173412Skevlovoid applymask(struct in6_addr *, struct in6_addr *); 234173412Skevlovoid applyplen(struct in6_addr *, int); 235173412Skevlovoid ifrtdump(int); 236173412Skevlovoid ifdump(int); 237173412Skevlovoid ifdump0(FILE *, const struct ifc *); 238243233Shrsvoid ifremove(int); 239173412Skevlovoid rtdump(int); 240173412Skevlovoid rt_entry(struct rt_msghdr *, int); 241173412Skevlovoid rtdexit(void); 242173412Skevlovoid riprequest(struct ifc *, struct netinfo6 *, int, 243173412Skevlo struct sockaddr_in6 *); 244243232Shrsvoid ripflush(struct ifc *, struct sockaddr_in6 *, int, struct netinfo6 *np); 245173412Skevlovoid sendrequest(struct ifc *); 246173412Skevloint sin6mask2len(const struct sockaddr_in6 *); 247173412Skevloint mask2len(const struct in6_addr *, int); 248173412Skevloint sendpacket(struct sockaddr_in6 *, int); 249173412Skevloint addroute(struct riprt *, const struct in6_addr *, struct ifc *); 250173412Skevloint delroute(struct netinfo6 *, struct in6_addr *); 251173412Skevlostruct in6_addr *getroute(struct netinfo6 *, struct in6_addr *); 252173412Skevlovoid krtread(int); 253173412Skevloint tobeadv(struct riprt *, struct ifc *); 254173412Skevlochar *allocopy(char *); 255173412Skevlochar *hms(void); 256173412Skevloconst char *inet6_n2p(const struct in6_addr *); 257173412Skevlostruct ifac *ifa_match(const struct ifc *, const struct in6_addr *, int); 258173412Skevlostruct in6_addr *plen2mask(int); 259243232Shrsstruct riprt *rtsearch(struct netinfo6 *); 260173412Skevloint ripinterval(int); 261173412Skevlotime_t ripsuptrig(void); 262173412Skevlovoid fatal(const char *, ...) 26366807Skris __attribute__((__format__(__printf__, 1, 2))); 264173412Skevlovoid trace(int, const char *, ...) 26566807Skris __attribute__((__format__(__printf__, 2, 3))); 266173412Skevlovoid tracet(int, const char *, ...) 26766807Skris __attribute__((__format__(__printf__, 2, 3))); 268173412Skevlounsigned int if_maxindex(void); 269173412Skevlostruct ifc *ifc_find(char *); 270173412Skevlostruct iff *iff_find(struct ifc *, int); 271173412Skevlovoid setindex2ifc(int, struct ifc *); 27255163Sshin 27355163Sshin#define MALLOC(type) ((type *)malloc(sizeof(type))) 27455163Sshin 275243232Shrs#define IFIL_TYPE_ANY 0x0 276243232Shrs#define IFIL_TYPE_A 'A' 277243232Shrs#define IFIL_TYPE_N 'N' 278243232Shrs#define IFIL_TYPE_T 'T' 279243232Shrs#define IFIL_TYPE_O 'O' 280243232Shrs#define IFIL_TYPE_L 'L' 281243232Shrs 28255163Sshinint 283243232Shrsmain(int argc, char *argv[]) 28455163Sshin{ 28555163Sshin int ch; 28655163Sshin int error = 0; 287243233Shrs unsigned long proto; 28855163Sshin struct ifc *ifcp; 28955163Sshin sigset_t mask, omask; 290243233Shrs const char *pidfile = ROUTE6D_PID; 291243233Shrs FILE *pidfh; 29255163Sshin char *progname; 29362607Sitojun char *ep; 29455163Sshin 29555163Sshin progname = strrchr(*argv, '/'); 29655163Sshin if (progname) 29755163Sshin progname++; 29855163Sshin else 29955163Sshin progname = *argv; 30055163Sshin 30155163Sshin pid = getpid(); 302243233Shrs while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnp:P:Q:qsS")) != -1) { 30355163Sshin switch (ch) { 30455163Sshin case 'A': 30555163Sshin case 'N': 30655163Sshin case 'O': 30755163Sshin case 'T': 30855163Sshin case 'L': 30962607Sitojun if (nfilter >= MAXFILTER) { 31055163Sshin fatal("Exceeds MAXFILTER"); 31162607Sitojun /*NOTREACHED*/ 31262607Sitojun } 31355163Sshin filtertype[nfilter] = ch; 31455163Sshin filter[nfilter++] = allocopy(optarg); 31555163Sshin break; 31655163Sshin case 't': 31762607Sitojun ep = NULL; 31862607Sitojun routetag = strtoul(optarg, &ep, 0); 31962607Sitojun if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) { 32055163Sshin fatal("invalid route tag"); 32155163Sshin /*NOTREACHED*/ 32255163Sshin } 32355163Sshin break; 324243233Shrs case 'p': 325243233Shrs pidfile = optarg; 326243233Shrs break; 327243233Shrs case 'P': 328243233Shrs ep = NULL; 329243233Shrs proto = strtoul(optarg, &ep, 0); 330243233Shrs if (!ep || *ep != '\0' || 3 < proto) { 331243233Shrs fatal("invalid P flag"); 332243233Shrs /*NOTREACHED*/ 333243233Shrs } 334243233Shrs if (proto == 0) 335243233Shrs Pflag = 0; 336243233Shrs if (proto == 1) 337243233Shrs Pflag |= RTF_PROTO1; 338243233Shrs if (proto == 2) 339243233Shrs Pflag |= RTF_PROTO2; 340243233Shrs if (proto == 3) 341243233Shrs Pflag |= RTF_PROTO3; 342243233Shrs break; 343243233Shrs case 'Q': 344243233Shrs ep = NULL; 345243233Shrs proto = strtoul(optarg, &ep, 0); 346243233Shrs if (!ep || *ep != '\0' || 3 < proto) { 347243233Shrs fatal("invalid Q flag"); 348243233Shrs /*NOTREACHED*/ 349243233Shrs } 350243233Shrs if (proto == 0) 351243233Shrs Qflag = 0; 352243233Shrs if (proto == 1) 353243233Shrs Qflag |= RTF_PROTO1; 354243233Shrs if (proto == 2) 355243233Shrs Qflag |= RTF_PROTO2; 356243233Shrs if (proto == 3) 357243233Shrs Qflag |= RTF_PROTO3; 358243233Shrs break; 35955163Sshin case 'R': 36062607Sitojun if ((rtlog = fopen(optarg, "w")) == NULL) { 36155163Sshin fatal("Can not write to routelog"); 36262607Sitojun /*NOTREACHED*/ 36362607Sitojun } 36455163Sshin break; 36562607Sitojun#define FLAG(c, flag, n) case c: do { flag = n; break; } while(0) 36662607Sitojun FLAG('a', aflag, 1); break; 36762607Sitojun FLAG('d', dflag, 1); break; 36862607Sitojun FLAG('D', dflag, 2); break; 36962607Sitojun FLAG('h', hflag, 1); break; 37062607Sitojun FLAG('l', lflag, 1); break; 37162607Sitojun FLAG('n', nflag, 1); break; 37262607Sitojun FLAG('q', qflag, 1); break; 37362607Sitojun FLAG('s', sflag, 1); break; 37462607Sitojun FLAG('S', Sflag, 1); break; 37555163Sshin#undef FLAG 37655163Sshin default: 37755163Sshin fatal("Invalid option specified, terminating"); 37862607Sitojun /*NOTREACHED*/ 37955163Sshin } 38055163Sshin } 38155163Sshin argc -= optind; 38255163Sshin argv += optind; 38378064Sume if (argc > 0) { 38455163Sshin fatal("bogus extra arguments"); 38578064Sume /*NOTREACHED*/ 38678064Sume } 38755163Sshin 38855163Sshin if (geteuid()) { 38955163Sshin nflag = 1; 39055163Sshin fprintf(stderr, "No kernel update is allowed\n"); 39155163Sshin } 392119037Sume 393119037Sume if (dflag == 0) { 394119037Sume if (daemon(0, 0) < 0) { 395119037Sume fatal("daemon"); 396119037Sume /*NOTREACHED*/ 397119037Sume } 398119037Sume } 399119037Sume 40055163Sshin openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON); 40155163Sshin logopened++; 40278064Sume 40378064Sume if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) 40478064Sume fatal("malloc"); 40578064Sume memset(ripbuf, 0, RIP6_MAXMTU); 40678064Sume ripbuf->rip6_cmd = RIP6_RESPONSE; 40778064Sume ripbuf->rip6_vers = RIP6_VERSION; 40878064Sume ripbuf->rip6_res1[0] = 0; 40978064Sume ripbuf->rip6_res1[1] = 0; 41078064Sume 41155163Sshin init(); 41255163Sshin ifconfig(); 413243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 41455163Sshin if (ifcp->ifc_index < 0) { 415243232Shrs fprintf(stderr, "No ifindex found at %s " 416243232Shrs "(no link-local address?)\n", ifcp->ifc_name); 41755163Sshin error++; 41855163Sshin } 41955163Sshin } 42055163Sshin if (error) 42155163Sshin exit(1); 42278064Sume if (loopifcp == NULL) { 42355163Sshin fatal("No loopback found"); 42478064Sume /*NOTREACHED*/ 42578064Sume } 426243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 42755163Sshin ifrt(ifcp, 0); 428243232Shrs } 42955163Sshin filterconfig(); 43055163Sshin krtread(0); 43155163Sshin if (dflag) 43255163Sshin ifrtdump(0); 43355163Sshin 43455163Sshin pid = getpid(); 435243233Shrs if ((pidfh = fopen(pidfile, "w")) != NULL) { 436243233Shrs fprintf(pidfh, "%d\n", pid); 437243233Shrs fclose(pidfh); 43855163Sshin } 43955163Sshin 44078064Sume if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) { 44155163Sshin fatal("malloc"); 44278064Sume /*NOTREACHED*/ 44378064Sume } 44462607Sitojun memset(ripbuf, 0, RIP6_MAXMTU); 44555163Sshin ripbuf->rip6_cmd = RIP6_RESPONSE; 44655163Sshin ripbuf->rip6_vers = RIP6_VERSION; 44755163Sshin ripbuf->rip6_res1[0] = 0; 44855163Sshin ripbuf->rip6_res1[1] = 0; 44955163Sshin 45078064Sume if (signal(SIGALRM, sighandler) == SIG_ERR || 45178064Sume signal(SIGQUIT, sighandler) == SIG_ERR || 45278064Sume signal(SIGTERM, sighandler) == SIG_ERR || 45378064Sume signal(SIGUSR1, sighandler) == SIG_ERR || 45478064Sume signal(SIGHUP, sighandler) == SIG_ERR || 45578064Sume signal(SIGINT, sighandler) == SIG_ERR) { 45678064Sume fatal("signal"); 45778064Sume /*NOTREACHED*/ 45878064Sume } 45955163Sshin /* 46055163Sshin * To avoid rip packet congestion (not on a cable but in this 46155163Sshin * process), wait for a moment to send the first RIP6_RESPONSE 46255163Sshin * packets. 46355163Sshin */ 46455163Sshin alarm(ripinterval(INIT_INTERVAL6)); 46555163Sshin 466243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 467243232Shrs if (iff_find(ifcp, IFIL_TYPE_N) != NULL) 468119041Sume continue; 46955163Sshin if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 47055163Sshin sendrequest(ifcp); 47155163Sshin } 47255163Sshin 47355163Sshin syslog(LOG_INFO, "**** Started ****"); 47455163Sshin sigemptyset(&mask); 47555163Sshin sigaddset(&mask, SIGALRM); 47655163Sshin while (1) { 47778064Sume if (seenalrm) { 47878064Sume ripalarm(); 47978064Sume seenalrm = 0; 48078064Sume continue; 48178064Sume } 48278064Sume if (seenquit) { 48378064Sume rtdexit(); 48478064Sume seenquit = 0; 48578064Sume continue; 48678064Sume } 48778064Sume if (seenusr1) { 48878064Sume ifrtdump(SIGUSR1); 48978064Sume seenusr1 = 0; 49078064Sume continue; 49178064Sume } 49278064Sume 493119076Sume#ifdef HAVE_POLL_H 494119076Sume switch (poll(set, 2, INFTIM)) 495119076Sume#else 496119070Sume memcpy(recvecp, sockvecp, fdmasks); 497119076Sume switch (select(maxfd + 1, recvecp, 0, 0, 0)) 498119076Sume#endif 499119076Sume { 50055163Sshin case -1: 50178064Sume if (errno != EINTR) { 50278064Sume fatal("select"); 50378064Sume /*NOTREACHED*/ 50478064Sume } 50578064Sume continue; 50655163Sshin case 0: 50755163Sshin continue; 50855163Sshin default: 509119076Sume#ifdef HAVE_POLL_H 510119076Sume if (set[0].revents & POLLIN) 511119076Sume#else 512119076Sume if (FD_ISSET(ripsock, recvecp)) 513119076Sume#endif 514119076Sume { 51555163Sshin sigprocmask(SIG_BLOCK, &mask, &omask); 51655163Sshin riprecv(); 51755163Sshin sigprocmask(SIG_SETMASK, &omask, NULL); 51855163Sshin } 519119076Sume#ifdef HAVE_POLL_H 520119076Sume if (set[1].revents & POLLIN) 521119076Sume#else 522119076Sume if (FD_ISSET(rtsock, recvecp)) 523119076Sume#endif 524119076Sume { 52555163Sshin sigprocmask(SIG_BLOCK, &mask, &omask); 52655163Sshin rtrecv(); 52755163Sshin sigprocmask(SIG_SETMASK, &omask, NULL); 52855163Sshin } 52955163Sshin } 53055163Sshin } 53155163Sshin} 53255163Sshin 53378064Sumevoid 534243232Shrssighandler(int signo) 53578064Sume{ 53678064Sume 53778064Sume switch (signo) { 53878064Sume case SIGALRM: 53978064Sume seenalrm++; 54078064Sume break; 54178064Sume case SIGQUIT: 54278064Sume case SIGTERM: 54378064Sume seenquit++; 54478064Sume break; 54578064Sume case SIGUSR1: 54678064Sume case SIGHUP: 54778064Sume case SIGINT: 54878064Sume seenusr1++; 54978064Sume break; 55078064Sume } 55178064Sume} 55278064Sume 55355163Sshin/* 55455163Sshin * gracefully exits after resetting sockopts. 55555163Sshin */ 55655163Sshin/* ARGSUSED */ 55755163Sshinvoid 558243232Shrsrtdexit(void) 55955163Sshin{ 56055163Sshin struct riprt *rrt; 56155163Sshin 56255163Sshin alarm(0); 563243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 56462607Sitojun if (rrt->rrt_rflags & RRTF_AGGREGATE) { 56555163Sshin delroute(&rrt->rrt_info, &rrt->rrt_gw); 56655163Sshin } 56755163Sshin } 56855163Sshin close(ripsock); 56955163Sshin close(rtsock); 57055163Sshin syslog(LOG_INFO, "**** Terminated ****"); 57155163Sshin closelog(); 57255163Sshin exit(1); 57355163Sshin} 57455163Sshin 57555163Sshin/* 57655163Sshin * Called periodically: 57755163Sshin * 1. age out the learned route. remove it if necessary. 57855163Sshin * 2. submit RIP6_RESPONSE packets. 57978064Sume * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have 58055163Sshin * to invoke this function in every 1 or 5 or 10 seconds only to age the 58155163Sshin * routes more precisely. 58255163Sshin */ 58355163Sshin/* ARGSUSED */ 58455163Sshinvoid 585243232Shrsripalarm(void) 58655163Sshin{ 58755163Sshin struct ifc *ifcp; 588243232Shrs struct riprt *rrt, *rrt_tmp; 58955163Sshin time_t t_lifetime, t_holddown; 59055163Sshin 59155163Sshin /* age the RIP routes */ 59255163Sshin t_lifetime = time(NULL) - RIP_LIFETIME; 59355163Sshin t_holddown = t_lifetime - RIP_HOLDDOWN; 594243232Shrs TAILQ_FOREACH_SAFE(rrt, &riprt_head, rrt_next, rrt_tmp) { 595243232Shrs if (rrt->rrt_t == 0) 59655163Sshin continue; 597243232Shrs else if (rrt->rrt_t < t_holddown) { 598243232Shrs TAILQ_REMOVE(&riprt_head, rrt, rrt_next); 59955163Sshin delroute(&rrt->rrt_info, &rrt->rrt_gw); 60055163Sshin free(rrt); 601243232Shrs } else if (rrt->rrt_t < t_lifetime) 60255163Sshin rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 60355163Sshin } 60455163Sshin /* Supply updates */ 605243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 60655163Sshin if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 60755163Sshin ripsend(ifcp, &ifcp->ifc_ripsin, 0); 60855163Sshin } 60955163Sshin alarm(ripinterval(SUPPLY_INTERVAL6)); 61055163Sshin} 61155163Sshin 61255163Sshinvoid 613243232Shrsinit(void) 61455163Sshin{ 615119034Sume int error; 616119034Sume const int int0 = 0, int1 = 1, int255 = 255; 61755163Sshin struct addrinfo hints, *res; 618119081Sume char port[NI_MAXSERV]; 61955163Sshin 620243232Shrs TAILQ_INIT(&ifc_head); 62155163Sshin nindex2ifc = 0; /*initial guess*/ 62255163Sshin index2ifc = NULL; 623119081Sume snprintf(port, sizeof(port), "%u", RIP6_PORT); 62455163Sshin 62555163Sshin memset(&hints, 0, sizeof(hints)); 62655163Sshin hints.ai_family = PF_INET6; 62755163Sshin hints.ai_socktype = SOCK_DGRAM; 628119080Sume hints.ai_protocol = IPPROTO_UDP; 62955163Sshin hints.ai_flags = AI_PASSIVE; 63055163Sshin error = getaddrinfo(NULL, port, &hints, &res); 63178064Sume if (error) { 63266807Skris fatal("%s", gai_strerror(error)); 63378064Sume /*NOTREACHED*/ 63478064Sume } 63578064Sume if (res->ai_next) { 63655163Sshin fatal(":: resolved to multiple address"); 63778064Sume /*NOTREACHED*/ 63878064Sume } 63955163Sshin 64055163Sshin ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 64178064Sume if (ripsock < 0) { 64255163Sshin fatal("rip socket"); 64378064Sume /*NOTREACHED*/ 64478064Sume } 645119034Sume#ifdef IPV6_V6ONLY 646119034Sume if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_V6ONLY, 647119034Sume &int1, sizeof(int1)) < 0) { 648119034Sume fatal("rip IPV6_V6ONLY"); 649119034Sume /*NOTREACHED*/ 650119034Sume } 651119034Sume#endif 65278064Sume if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) { 65355163Sshin fatal("rip bind"); 65478064Sume /*NOTREACHED*/ 65578064Sume } 65655163Sshin if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 65778064Sume &int255, sizeof(int255)) < 0) { 65855163Sshin fatal("rip IPV6_MULTICAST_HOPS"); 65978064Sume /*NOTREACHED*/ 66078064Sume } 66155163Sshin if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 66278064Sume &int0, sizeof(int0)) < 0) { 66355163Sshin fatal("rip IPV6_MULTICAST_LOOP"); 66478064Sume /*NOTREACHED*/ 66578064Sume } 66662921Sume 66762607Sitojun#ifdef IPV6_RECVPKTINFO 668119034Sume if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, 669119034Sume &int1, sizeof(int1)) < 0) { 67062607Sitojun fatal("rip IPV6_RECVPKTINFO"); 67178064Sume /*NOTREACHED*/ 67278064Sume } 67362607Sitojun#else /* old adv. API */ 674119034Sume if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO, 675119034Sume &int1, sizeof(int1)) < 0) { 67655163Sshin fatal("rip IPV6_PKTINFO"); 67778064Sume /*NOTREACHED*/ 67878064Sume } 67962607Sitojun#endif 68055163Sshin 681164339Ssuz#ifdef IPV6_RECVPKTINFO 682164339Ssuz if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, 683164339Ssuz &int1, sizeof(int1)) < 0) { 684164339Ssuz fatal("rip IPV6_RECVHOPLIMIT"); 685164339Ssuz /*NOTREACHED*/ 686164339Ssuz } 687164339Ssuz#else /* old adv. API */ 688164339Ssuz if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_HOPLIMIT, 689164339Ssuz &int1, sizeof(int1)) < 0) { 690164339Ssuz fatal("rip IPV6_HOPLIMIT"); 691164339Ssuz /*NOTREACHED*/ 692164339Ssuz } 693164339Ssuz#endif 694164339Ssuz 69555163Sshin memset(&hints, 0, sizeof(hints)); 69655163Sshin hints.ai_family = PF_INET6; 69755163Sshin hints.ai_socktype = SOCK_DGRAM; 698119080Sume hints.ai_protocol = IPPROTO_UDP; 69955163Sshin error = getaddrinfo(RIP6_DEST, port, &hints, &res); 70078064Sume if (error) { 70166807Skris fatal("%s", gai_strerror(error)); 70278064Sume /*NOTREACHED*/ 70378064Sume } 70478064Sume if (res->ai_next) { 70555163Sshin fatal("%s resolved to multiple address", RIP6_DEST); 70678064Sume /*NOTREACHED*/ 70778064Sume } 70855163Sshin memcpy(&ripsin, res->ai_addr, res->ai_addrlen); 70955163Sshin 710119076Sume#ifdef HAVE_POLL_H 711119076Sume set[0].fd = ripsock; 712119076Sume set[0].events = POLLIN; 713119076Sume#else 714119070Sume maxfd = ripsock; 715119076Sume#endif 71655163Sshin 71755163Sshin if (nflag == 0) { 71878064Sume if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) { 71955163Sshin fatal("route socket"); 72078064Sume /*NOTREACHED*/ 72178064Sume } 722119076Sume#ifdef HAVE_POLL_H 723119076Sume set[1].fd = rtsock; 724119076Sume set[1].events = POLLIN; 725119076Sume#else 726119070Sume if (rtsock > maxfd) 727119070Sume maxfd = rtsock; 728119076Sume#endif 729119076Sume } else { 730119076Sume#ifdef HAVE_POLL_H 731119076Sume set[1].fd = -1; 732119076Sume#else 73355163Sshin rtsock = -1; /*just for safety */ 734119076Sume#endif 735119076Sume } 736119070Sume 737119076Sume#ifndef HAVE_POLL_H 738119070Sume fdmasks = howmany(maxfd + 1, NFDBITS) * sizeof(fd_mask); 739119070Sume if ((sockvecp = malloc(fdmasks)) == NULL) { 740119070Sume fatal("malloc"); 741119070Sume /*NOTREACHED*/ 742119070Sume } 743119070Sume if ((recvecp = malloc(fdmasks)) == NULL) { 744119070Sume fatal("malloc"); 745119070Sume /*NOTREACHED*/ 746119070Sume } 747119070Sume memset(sockvecp, 0, fdmasks); 748119070Sume FD_SET(ripsock, sockvecp); 749119070Sume if (rtsock >= 0) 750119070Sume FD_SET(rtsock, sockvecp); 751119076Sume#endif 75255163Sshin} 75355163Sshin 75462607Sitojun#define RIPSIZE(n) \ 75562607Sitojun (sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6)) 75655163Sshin 75755163Sshin/* 75855163Sshin * ripflush flushes the rip datagram stored in the rip buffer 75955163Sshin */ 76055163Sshinvoid 761243232Shrsripflush(struct ifc *ifcp, struct sockaddr_in6 *sin6, int nrt, struct netinfo6 *np) 76255163Sshin{ 76355163Sshin int i; 76455163Sshin int error; 76555163Sshin 76655163Sshin if (ifcp) 76755163Sshin tracet(1, "Send(%s): info(%d) to %s.%d\n", 76855163Sshin ifcp->ifc_name, nrt, 769119031Sume inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)); 77055163Sshin else 77155163Sshin tracet(1, "Send: info(%d) to %s.%d\n", 772119031Sume nrt, inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)); 77355163Sshin if (dflag >= 2) { 77455163Sshin np = ripbuf->rip6_nets; 77555163Sshin for (i = 0; i < nrt; i++, np++) { 77655163Sshin if (np->rip6_metric == NEXTHOP_METRIC) { 77755163Sshin if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) 77862607Sitojun trace(2, " NextHop reset"); 77955163Sshin else { 78055163Sshin trace(2, " NextHop %s", 78155163Sshin inet6_n2p(&np->rip6_dest)); 78255163Sshin } 78355163Sshin } else { 78455163Sshin trace(2, " %s/%d[%d]", 78555163Sshin inet6_n2p(&np->rip6_dest), 78655163Sshin np->rip6_plen, np->rip6_metric); 78755163Sshin } 78855163Sshin if (np->rip6_tag) { 78955163Sshin trace(2, " tag=0x%04x", 79055163Sshin ntohs(np->rip6_tag) & 0xffff); 79155163Sshin } 79255163Sshin trace(2, "\n"); 79355163Sshin } 79455163Sshin } 795119031Sume error = sendpacket(sin6, RIPSIZE(nrt)); 79655163Sshin if (error == EAFNOSUPPORT) { 79755163Sshin /* Protocol not supported */ 79855163Sshin tracet(1, "Could not send info to %s (%s): " 79955163Sshin "set IFF_UP to 0\n", 80055163Sshin ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 80155163Sshin ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 80255163Sshin } 80355163Sshin} 80455163Sshin 80555163Sshin/* 80655163Sshin * Generate RIP6_RESPONSE packets and send them. 80755163Sshin */ 80855163Sshinvoid 809243232Shrsripsend(struct ifc *ifcp, struct sockaddr_in6 *sin6, int flag) 81055163Sshin{ 81155163Sshin struct riprt *rrt; 81255163Sshin struct in6_addr *nh; /* next hop */ 813243232Shrs struct netinfo6 *np; 81478064Sume int maxrte; 815243232Shrs int nrt; 81655163Sshin 817119084Sume if (qflag) 818119084Sume return; 819119084Sume 82055163Sshin if (ifcp == NULL) { 82155163Sshin /* 82255163Sshin * Request from non-link local address is not 82355163Sshin * a regular route6d update. 82455163Sshin */ 82562607Sitojun maxrte = (IFMINMTU - sizeof(struct ip6_hdr) - 82662607Sitojun sizeof(struct udphdr) - 82755163Sshin sizeof(struct rip6) + sizeof(struct netinfo6)) / 82855163Sshin sizeof(struct netinfo6); 829243232Shrs nh = NULL; 830243232Shrs nrt = 0; 831243232Shrs np = ripbuf->rip6_nets; 832243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 83362607Sitojun if (rrt->rrt_rflags & RRTF_NOADVERTISE) 83455163Sshin continue; 83555163Sshin /* Put the route to the buffer */ 83655163Sshin *np = rrt->rrt_info; 83755163Sshin np++; nrt++; 83855163Sshin if (nrt == maxrte) { 839243232Shrs ripflush(NULL, sin6, nrt, np); 84055163Sshin nh = NULL; 841243232Shrs nrt = 0; 842243232Shrs np = ripbuf->rip6_nets; 84355163Sshin } 84455163Sshin } 84555163Sshin if (nrt) /* Send last packet */ 846243232Shrs ripflush(NULL, sin6, nrt, np); 84755163Sshin return; 84855163Sshin } 84955163Sshin 85062607Sitojun if ((flag & RRTF_SENDANYWAY) == 0 && 85155163Sshin (qflag || (ifcp->ifc_flags & IFF_LOOPBACK))) 85255163Sshin return; 85378064Sume 85478064Sume /* -N: no use */ 855243232Shrs if (iff_find(ifcp, IFIL_TYPE_N) != NULL) 85655163Sshin return; 85778064Sume 85878064Sume /* -T: generate default route only */ 859243232Shrs if (iff_find(ifcp, IFIL_TYPE_T) != NULL) { 86055163Sshin struct netinfo6 rrt_info; 86155163Sshin memset(&rrt_info, 0, sizeof(struct netinfo6)); 86255163Sshin rrt_info.rip6_dest = in6addr_any; 86355163Sshin rrt_info.rip6_plen = 0; 86455163Sshin rrt_info.rip6_metric = 1; 86578064Sume rrt_info.rip6_metric += ifcp->ifc_metric; 86655163Sshin rrt_info.rip6_tag = htons(routetag & 0xffff); 86755163Sshin np = ripbuf->rip6_nets; 86855163Sshin *np = rrt_info; 86955163Sshin nrt = 1; 870243232Shrs ripflush(ifcp, sin6, nrt, np); 87155163Sshin return; 87255163Sshin } 87378064Sume 87462607Sitojun maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) - 87562607Sitojun sizeof(struct udphdr) - 87655163Sshin sizeof(struct rip6) + sizeof(struct netinfo6)) / 87755163Sshin sizeof(struct netinfo6); 87878064Sume 87955163Sshin nrt = 0; np = ripbuf->rip6_nets; nh = NULL; 880243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 88162607Sitojun if (rrt->rrt_rflags & RRTF_NOADVERTISE) 88255163Sshin continue; 88378064Sume 88478064Sume /* Need to check filter here */ 88578064Sume if (out_filter(rrt, ifcp) == 0) 88655163Sshin continue; 88778064Sume 88855163Sshin /* Check split horizon and other conditions */ 88955163Sshin if (tobeadv(rrt, ifcp) == 0) 89055163Sshin continue; 89178064Sume 89255163Sshin /* Only considers the routes with flag if specified */ 89362607Sitojun if ((flag & RRTF_CHANGED) && 89462607Sitojun (rrt->rrt_rflags & RRTF_CHANGED) == 0) 89555163Sshin continue; 89678064Sume 89755163Sshin /* Check nexthop */ 89855163Sshin if (rrt->rrt_index == ifcp->ifc_index && 89955163Sshin !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) && 90062607Sitojun (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) == 0) { 90155163Sshin if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) { 902243232Shrs if (nrt == maxrte - 2) { 903243232Shrs ripflush(ifcp, sin6, nrt, np); 904243232Shrs nh = NULL; 905243232Shrs nrt = 0; 906243232Shrs np = ripbuf->rip6_nets; 907243232Shrs } 908243232Shrs 90955163Sshin np->rip6_dest = rrt->rrt_gw; 91055163Sshin np->rip6_plen = 0; 91155163Sshin np->rip6_tag = 0; 91255163Sshin np->rip6_metric = NEXTHOP_METRIC; 91355163Sshin nh = &rrt->rrt_gw; 91455163Sshin np++; nrt++; 91555163Sshin } 91655163Sshin } else if (nh && (rrt->rrt_index != ifcp->ifc_index || 91755163Sshin !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) || 91862607Sitojun rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)) { 91955163Sshin /* Reset nexthop */ 920243232Shrs if (nrt == maxrte - 2) { 921243232Shrs ripflush(ifcp, sin6, nrt, np); 922243232Shrs nh = NULL; 923243232Shrs nrt = 0; 924243232Shrs np = ripbuf->rip6_nets; 925243232Shrs } 92655163Sshin memset(np, 0, sizeof(struct netinfo6)); 92755163Sshin np->rip6_metric = NEXTHOP_METRIC; 92855163Sshin nh = NULL; 92955163Sshin np++; nrt++; 93055163Sshin } 93178064Sume 93255163Sshin /* Put the route to the buffer */ 93355163Sshin *np = rrt->rrt_info; 93455163Sshin np++; nrt++; 93555163Sshin if (nrt == maxrte) { 936243232Shrs ripflush(ifcp, sin6, nrt, np); 93755163Sshin nh = NULL; 938243232Shrs nrt = 0; 939243232Shrs np = ripbuf->rip6_nets; 94055163Sshin } 94155163Sshin } 94255163Sshin if (nrt) /* Send last packet */ 943243232Shrs ripflush(ifcp, sin6, nrt, np); 94455163Sshin} 94555163Sshin 94655163Sshin/* 94778064Sume * outbound filter logic, per-route/interface. 94878064Sume */ 94978064Sumeint 950243232Shrsout_filter(struct riprt *rrt, struct ifc *ifcp) 95178064Sume{ 95278064Sume struct iff *iffp; 95378064Sume struct in6_addr ia; 95478064Sume int ok; 95578064Sume 95678064Sume /* 95778064Sume * -A: filter out less specific routes, if we have aggregated 95878064Sume * route configured. 95978064Sume */ 960243232Shrs TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) { 96178064Sume if (iffp->iff_type != 'A') 96278064Sume continue; 96378064Sume if (rrt->rrt_info.rip6_plen <= iffp->iff_plen) 96478064Sume continue; 96578064Sume ia = rrt->rrt_info.rip6_dest; 96678064Sume applyplen(&ia, iffp->iff_plen); 96778064Sume if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) 96878064Sume return 0; 96978064Sume } 97078064Sume 97178064Sume /* 97278064Sume * if it is an aggregated route, advertise it only to the 97378064Sume * interfaces specified on -A. 97478064Sume */ 97578064Sume if ((rrt->rrt_rflags & RRTF_AGGREGATE) != 0) { 97678064Sume ok = 0; 977243232Shrs TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) { 97878064Sume if (iffp->iff_type != 'A') 97978064Sume continue; 98078064Sume if (rrt->rrt_info.rip6_plen == iffp->iff_plen && 98178064Sume IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 98278064Sume &iffp->iff_addr)) { 98378064Sume ok = 1; 98478064Sume break; 98578064Sume } 98678064Sume } 98778064Sume if (!ok) 98878064Sume return 0; 98978064Sume } 99078064Sume 99178064Sume /* 99278064Sume * -O: advertise only if prefix matches the configured prefix. 99378064Sume */ 994243232Shrs if (iff_find(ifcp, IFIL_TYPE_O) != NULL) { 99578064Sume ok = 0; 996243232Shrs TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) { 99778064Sume if (iffp->iff_type != 'O') 99878064Sume continue; 99978064Sume if (rrt->rrt_info.rip6_plen < iffp->iff_plen) 100078064Sume continue; 100178064Sume ia = rrt->rrt_info.rip6_dest; 100278064Sume applyplen(&ia, iffp->iff_plen); 100378064Sume if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 100478064Sume ok = 1; 100578064Sume break; 100678064Sume } 100778064Sume } 100878064Sume if (!ok) 100978064Sume return 0; 101078064Sume } 101178064Sume 101278064Sume /* the prefix should be advertised */ 101378064Sume return 1; 101478064Sume} 101578064Sume 101678064Sume/* 101755163Sshin * Determine if the route is to be advertised on the specified interface. 101855163Sshin * It checks options specified in the arguments and the split horizon rule. 101955163Sshin */ 102055163Sshinint 1021243232Shrstobeadv(struct riprt *rrt, struct ifc *ifcp) 102255163Sshin{ 102355163Sshin 102455163Sshin /* Special care for static routes */ 102555163Sshin if (rrt->rrt_flags & RTF_STATIC) { 102662607Sitojun /* XXX don't advertise reject/blackhole routes */ 102762607Sitojun if (rrt->rrt_flags & (RTF_REJECT | RTF_BLACKHOLE)) 102862607Sitojun return 0; 102962607Sitojun 103055163Sshin if (Sflag) /* Yes, advertise it anyway */ 103155163Sshin return 1; 103255163Sshin if (sflag && rrt->rrt_index != ifcp->ifc_index) 103355163Sshin return 1; 103455163Sshin return 0; 103555163Sshin } 103655163Sshin /* Regular split horizon */ 103755163Sshin if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index) 103855163Sshin return 0; 103955163Sshin return 1; 104055163Sshin} 104155163Sshin 104255163Sshin/* 104355163Sshin * Send a rip packet actually. 104455163Sshin */ 104555163Sshinint 1046243232Shrssendpacket(struct sockaddr_in6 *sin6, int len) 104755163Sshin{ 104855163Sshin struct msghdr m; 104955163Sshin struct cmsghdr *cm; 105055163Sshin struct iovec iov[2]; 105155163Sshin u_char cmsgbuf[256]; 105255163Sshin struct in6_pktinfo *pi; 105378064Sume int idx; 105455163Sshin struct sockaddr_in6 sincopy; 105555163Sshin 105655163Sshin /* do not overwrite the given sin */ 1057119031Sume sincopy = *sin6; 1058119031Sume sin6 = &sincopy; 105955163Sshin 1060119035Sume if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1061243231Shrs IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 1062243231Shrs idx = sin6->sin6_scope_id; 1063243231Shrs else 106478064Sume idx = 0; 106555163Sshin 1066119031Sume m.msg_name = (caddr_t)sin6; 1067119031Sume m.msg_namelen = sizeof(*sin6); 106855163Sshin iov[0].iov_base = (caddr_t)ripbuf; 106955163Sshin iov[0].iov_len = len; 107055163Sshin m.msg_iov = iov; 107155163Sshin m.msg_iovlen = 1; 107278064Sume if (!idx) { 107355163Sshin m.msg_control = NULL; 107455163Sshin m.msg_controllen = 0; 107555163Sshin } else { 107655163Sshin memset(cmsgbuf, 0, sizeof(cmsgbuf)); 107755163Sshin cm = (struct cmsghdr *)cmsgbuf; 107855163Sshin m.msg_control = (caddr_t)cm; 107955163Sshin m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); 108055163Sshin 108155163Sshin cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 108255163Sshin cm->cmsg_level = IPPROTO_IPV6; 108355163Sshin cm->cmsg_type = IPV6_PKTINFO; 108455163Sshin pi = (struct in6_pktinfo *)CMSG_DATA(cm); 108555163Sshin memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/ 108678064Sume pi->ipi6_ifindex = idx; 108755163Sshin } 108855163Sshin 108955163Sshin if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) { 109055163Sshin trace(1, "sendmsg: %s\n", strerror(errno)); 109155163Sshin return errno; 109255163Sshin } 109362921Sume 109455163Sshin return 0; 109555163Sshin} 109655163Sshin 109755163Sshin/* 109878064Sume * Receive and process RIP packets. Update the routes/kernel forwarding 109955163Sshin * table if necessary. 110055163Sshin */ 110155163Sshinvoid 1102243232Shrsriprecv(void) 110355163Sshin{ 110455163Sshin struct ifc *ifcp, *ic; 110555163Sshin struct sockaddr_in6 fsock; 110655163Sshin struct in6_addr nh; /* next hop */ 110755163Sshin struct rip6 *rp; 110855163Sshin struct netinfo6 *np, *nq; 110955163Sshin struct riprt *rrt; 1110122677Sume ssize_t len, nn; 1111122677Sume unsigned int need_trigger, idx; 111255163Sshin char buf[4 * RIP6_MAXMTU]; 111355163Sshin time_t t; 111455163Sshin struct msghdr m; 111555163Sshin struct cmsghdr *cm; 111655163Sshin struct iovec iov[2]; 111755163Sshin u_char cmsgbuf[256]; 1118164339Ssuz struct in6_pktinfo *pi = NULL; 1119164339Ssuz int *hlimp = NULL; 112055163Sshin struct iff *iffp; 112155163Sshin struct in6_addr ia; 112255163Sshin int ok; 112378064Sume time_t t_half_lifetime; 112455163Sshin 112555163Sshin need_trigger = 0; 112662921Sume 112755163Sshin m.msg_name = (caddr_t)&fsock; 112855163Sshin m.msg_namelen = sizeof(fsock); 112955163Sshin iov[0].iov_base = (caddr_t)buf; 113055163Sshin iov[0].iov_len = sizeof(buf); 113155163Sshin m.msg_iov = iov; 113255163Sshin m.msg_iovlen = 1; 113355163Sshin cm = (struct cmsghdr *)cmsgbuf; 113455163Sshin m.msg_control = (caddr_t)cm; 113555163Sshin m.msg_controllen = sizeof(cmsgbuf); 113678064Sume if ((len = recvmsg(ripsock, &m, 0)) < 0) { 113755163Sshin fatal("recvmsg"); 113878064Sume /*NOTREACHED*/ 113978064Sume } 114078064Sume idx = 0; 114155163Sshin for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m); 114255163Sshin cm; 114355163Sshin cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) { 1144164339Ssuz if (cm->cmsg_level != IPPROTO_IPV6) 1145164339Ssuz continue; 1146164339Ssuz switch (cm->cmsg_type) { 1147164339Ssuz case IPV6_PKTINFO: 1148164339Ssuz if (cm->cmsg_len != CMSG_LEN(sizeof(*pi))) { 1149164339Ssuz trace(1, 1150164339Ssuz "invalid cmsg length for IPV6_PKTINFO\n"); 1151164339Ssuz return; 1152164339Ssuz } 115355163Sshin pi = (struct in6_pktinfo *)(CMSG_DATA(cm)); 115478064Sume idx = pi->ipi6_ifindex; 115555163Sshin break; 1156164339Ssuz case IPV6_HOPLIMIT: 1157164339Ssuz if (cm->cmsg_len != CMSG_LEN(sizeof(int))) { 1158164339Ssuz trace(1, 1159164339Ssuz "invalid cmsg length for IPV6_HOPLIMIT\n"); 1160164339Ssuz return; 1161164339Ssuz } 1162164339Ssuz hlimp = (int *)CMSG_DATA(cm); 1163164339Ssuz break; 116455163Sshin } 116555163Sshin } 116655163Sshin 1167243232Shrs if ((size_t)len < sizeof(struct rip6)) { 1168121779Ssuz trace(1, "Packet too short\n"); 1169121779Ssuz return; 1170121779Ssuz } 1171121779Ssuz 1172164339Ssuz if (pi == NULL || hlimp == NULL) { 1173164339Ssuz /* 1174164339Ssuz * This can happen when the kernel failed to allocate memory 1175164339Ssuz * for the ancillary data. Although we might be able to handle 1176164339Ssuz * some cases without this info, those are minor and not so 1177164339Ssuz * important, so it's better to discard the packet for safer 1178164339Ssuz * operation. 1179164339Ssuz */ 1180164339Ssuz trace(1, "IPv6 packet information cannot be retrieved\n"); 1181164339Ssuz return; 1182164339Ssuz } 1183164339Ssuz 118455163Sshin nh = fsock.sin6_addr; 118555163Sshin nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 118655163Sshin sizeof(struct netinfo6); 118755163Sshin rp = (struct rip6 *)buf; 118855163Sshin np = rp->rip6_nets; 118955163Sshin 1190119035Sume if (rp->rip6_vers != RIP6_VERSION) { 119155163Sshin trace(1, "Incorrect RIP version %d\n", rp->rip6_vers); 119255163Sshin return; 119355163Sshin } 119455163Sshin if (rp->rip6_cmd == RIP6_REQUEST) { 119578064Sume if (idx && idx < nindex2ifc) { 119678064Sume ifcp = index2ifc[idx]; 119755163Sshin riprequest(ifcp, np, nn, &fsock); 119855163Sshin } else { 119955163Sshin riprequest(NULL, np, nn, &fsock); 120055163Sshin } 120162607Sitojun return; 120262607Sitojun } 120355163Sshin 120455163Sshin if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) { 1205164339Ssuz trace(1, "Response from non-ll addr: %s\n", 120678064Sume inet6_n2p(&fsock.sin6_addr)); 120755163Sshin return; /* Ignore packets from non-link-local addr */ 120855163Sshin } 1209164339Ssuz if (ntohs(fsock.sin6_port) != RIP6_PORT) { 1210164339Ssuz trace(1, "Response from non-rip port from %s\n", 1211164339Ssuz inet6_n2p(&fsock.sin6_addr)); 1212164339Ssuz return; 1213164339Ssuz } 1214164339Ssuz if (IN6_IS_ADDR_MULTICAST(&pi->ipi6_addr) && *hlimp != 255) { 1215164339Ssuz trace(1, 1216164339Ssuz "Response packet with a smaller hop limit (%d) from %s\n", 1217164339Ssuz *hlimp, inet6_n2p(&fsock.sin6_addr)); 1218164339Ssuz return; 1219164339Ssuz } 1220164339Ssuz /* 1221164339Ssuz * Further validation: since this program does not send off-link 1222164339Ssuz * requests, an incoming response must always come from an on-link 1223164339Ssuz * node. Although this is normally ensured by the source address 1224164339Ssuz * check above, it may not 100% be safe because there are router 1225164339Ssuz * implementations that (invalidly) allow a packet with a link-local 1226164339Ssuz * source address to be forwarded to a different link. 1227164339Ssuz * So we also check whether the destination address is a link-local 1228164339Ssuz * address or the hop limit is 255. Note that RFC2080 does not require 1229164339Ssuz * the specific hop limit for a unicast response, so we cannot assume 1230164339Ssuz * the limitation. 1231164339Ssuz */ 1232164339Ssuz if (!IN6_IS_ADDR_LINKLOCAL(&pi->ipi6_addr) && *hlimp != 255) { 1233164339Ssuz trace(1, 1234164339Ssuz "Response packet possibly from an off-link node: " 1235164339Ssuz "from %s to %s hlim=%d\n", 1236164339Ssuz inet6_n2p(&fsock.sin6_addr), 1237164339Ssuz inet6_n2p(&pi->ipi6_addr), *hlimp); 1238164339Ssuz return; 1239164339Ssuz } 1240164339Ssuz 1241243231Shrs idx = fsock.sin6_scope_id; 124278064Sume ifcp = (idx < nindex2ifc) ? index2ifc[idx] : NULL; 124355163Sshin if (!ifcp) { 124478064Sume trace(1, "Packets to unknown interface index %d\n", idx); 124555163Sshin return; /* Ignore it */ 124655163Sshin } 124755163Sshin if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr)) 124855163Sshin return; /* The packet is from me; ignore */ 124955163Sshin if (rp->rip6_cmd != RIP6_RESPONSE) { 125055163Sshin trace(1, "Invalid command %d\n", rp->rip6_cmd); 125162607Sitojun return; 125255163Sshin } 125378064Sume 125478064Sume /* -N: no use */ 1255243232Shrs if (iff_find(ifcp, IFIL_TYPE_N) != NULL) 125655163Sshin return; 125778064Sume 1258228674Sdim tracet(1, "Recv(%s): from %s.%d info(%zd)\n", 125978064Sume ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), nn); 126055163Sshin 126155163Sshin t = time(NULL); 126278064Sume t_half_lifetime = t - (RIP_LIFETIME/2); 126355163Sshin for (; nn; nn--, np++) { 126455163Sshin if (np->rip6_metric == NEXTHOP_METRIC) { 126555163Sshin /* modify neighbor address */ 126655163Sshin if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 126755163Sshin nh = np->rip6_dest; 126855163Sshin trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 126955163Sshin } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) { 127055163Sshin nh = fsock.sin6_addr; 127155163Sshin trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 127255163Sshin } else { 127355163Sshin nh = fsock.sin6_addr; 127455163Sshin trace(1, "\tInvalid Nexthop: %s\n", 127578064Sume inet6_n2p(&np->rip6_dest)); 127655163Sshin } 127755163Sshin continue; 127855163Sshin } 127955163Sshin if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) { 128055163Sshin trace(1, "\tMulticast netinfo6: %s/%d [%d]\n", 128155163Sshin inet6_n2p(&np->rip6_dest), 128255163Sshin np->rip6_plen, np->rip6_metric); 128355163Sshin continue; 128455163Sshin } 128555163Sshin if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) { 128655163Sshin trace(1, "\tLoopback netinfo6: %s/%d [%d]\n", 128755163Sshin inet6_n2p(&np->rip6_dest), 128855163Sshin np->rip6_plen, np->rip6_metric); 128955163Sshin continue; 129055163Sshin } 129155163Sshin if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 129255163Sshin trace(1, "\tLink Local netinfo6: %s/%d [%d]\n", 129355163Sshin inet6_n2p(&np->rip6_dest), 129455163Sshin np->rip6_plen, np->rip6_metric); 129555163Sshin continue; 129655163Sshin } 129755163Sshin /* may need to pass sitelocal prefix in some case, however*/ 129855163Sshin if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) { 129955163Sshin trace(1, "\tSite Local netinfo6: %s/%d [%d]\n", 130055163Sshin inet6_n2p(&np->rip6_dest), 130155163Sshin np->rip6_plen, np->rip6_metric); 130255163Sshin continue; 130355163Sshin } 130455163Sshin trace(2, "\tnetinfo6: %s/%d [%d]", 130555163Sshin inet6_n2p(&np->rip6_dest), 130655163Sshin np->rip6_plen, np->rip6_metric); 130755163Sshin if (np->rip6_tag) 130855163Sshin trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff); 130962607Sitojun if (dflag >= 2) { 131062607Sitojun ia = np->rip6_dest; 131162607Sitojun applyplen(&ia, np->rip6_plen); 131262607Sitojun if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest)) 131362607Sitojun trace(2, " [junk outside prefix]"); 131462607Sitojun } 131555163Sshin 131678064Sume /* 131778064Sume * -L: listen only if the prefix matches the configuration 131878064Sume */ 1319243232Shrs ok = 1; /* if there's no L filter, it is ok */ 1320243232Shrs TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) { 1321243232Shrs if (iffp->iff_type != IFIL_TYPE_L) 1322243232Shrs continue; 1323243232Shrs ok = 0; 1324243232Shrs if (np->rip6_plen < iffp->iff_plen) 1325243232Shrs continue; 1326243232Shrs /* special rule: ::/0 means default, not "in /0" */ 1327243232Shrs if (iffp->iff_plen == 0 && np->rip6_plen > 0) 1328243232Shrs continue; 1329243232Shrs ia = np->rip6_dest; 1330243232Shrs applyplen(&ia, iffp->iff_plen); 1331243232Shrs if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 1332243232Shrs ok = 1; 1333243232Shrs break; 1334243232Shrs } 1335243232Shrs } 133655163Sshin if (!ok) { 133755163Sshin trace(2, " (filtered)\n"); 133855163Sshin continue; 133955163Sshin } 134055163Sshin 134155163Sshin trace(2, "\n"); 134255163Sshin np->rip6_metric++; 134355163Sshin np->rip6_metric += ifcp->ifc_metric; 134455163Sshin if (np->rip6_metric > HOPCNT_INFINITY6) 134555163Sshin np->rip6_metric = HOPCNT_INFINITY6; 134655163Sshin 134755163Sshin applyplen(&np->rip6_dest, np->rip6_plen); 1348243232Shrs if ((rrt = rtsearch(np)) != NULL) { 134955163Sshin if (rrt->rrt_t == 0) 135055163Sshin continue; /* Intf route has priority */ 135155163Sshin nq = &rrt->rrt_info; 135255163Sshin if (nq->rip6_metric > np->rip6_metric) { 135355163Sshin if (rrt->rrt_index == ifcp->ifc_index && 135455163Sshin IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 135555163Sshin /* Small metric from the same gateway */ 135655163Sshin nq->rip6_metric = np->rip6_metric; 135755163Sshin } else { 135855163Sshin /* Better route found */ 135955163Sshin rrt->rrt_index = ifcp->ifc_index; 136055163Sshin /* Update routing table */ 136155163Sshin delroute(nq, &rrt->rrt_gw); 136255163Sshin rrt->rrt_gw = nh; 136355163Sshin *nq = *np; 136455163Sshin addroute(rrt, &nh, ifcp); 136555163Sshin } 136662607Sitojun rrt->rrt_rflags |= RRTF_CHANGED; 136755163Sshin rrt->rrt_t = t; 136855163Sshin need_trigger = 1; 136955163Sshin } else if (nq->rip6_metric < np->rip6_metric && 137055163Sshin rrt->rrt_index == ifcp->ifc_index && 137155163Sshin IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 137255163Sshin /* Got worse route from same gw */ 137355163Sshin nq->rip6_metric = np->rip6_metric; 137455163Sshin rrt->rrt_t = t; 137562607Sitojun rrt->rrt_rflags |= RRTF_CHANGED; 137655163Sshin need_trigger = 1; 137755163Sshin } else if (nq->rip6_metric == np->rip6_metric && 137855163Sshin np->rip6_metric < HOPCNT_INFINITY6) { 137978064Sume if (rrt->rrt_index == ifcp->ifc_index && 138078064Sume IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 138178064Sume /* same metric, same route from same gw */ 138278064Sume rrt->rrt_t = t; 138378064Sume } else if (rrt->rrt_t < t_half_lifetime) { 138478064Sume /* Better route found */ 138578064Sume rrt->rrt_index = ifcp->ifc_index; 138678064Sume /* Update routing table */ 138778064Sume delroute(nq, &rrt->rrt_gw); 138878064Sume rrt->rrt_gw = nh; 138978064Sume *nq = *np; 139078064Sume addroute(rrt, &nh, ifcp); 139178064Sume rrt->rrt_rflags |= RRTF_CHANGED; 139278064Sume rrt->rrt_t = t; 139378064Sume } 139455163Sshin } 139562607Sitojun /* 139655163Sshin * if nq->rip6_metric == HOPCNT_INFINITY6 then 139778064Sume * do not update age value. Do nothing. 139855163Sshin */ 139955163Sshin } else if (np->rip6_metric < HOPCNT_INFINITY6) { 140055163Sshin /* Got a new valid route */ 140178064Sume if ((rrt = MALLOC(struct riprt)) == NULL) { 140255163Sshin fatal("malloc: struct riprt"); 140378064Sume /*NOTREACHED*/ 140478064Sume } 140562607Sitojun memset(rrt, 0, sizeof(*rrt)); 140655163Sshin nq = &rrt->rrt_info; 140755163Sshin 140855163Sshin rrt->rrt_same = NULL; 140955163Sshin rrt->rrt_index = ifcp->ifc_index; 141055163Sshin rrt->rrt_flags = RTF_UP|RTF_GATEWAY; 141155163Sshin rrt->rrt_gw = nh; 141255163Sshin *nq = *np; 141355163Sshin applyplen(&nq->rip6_dest, nq->rip6_plen); 141455163Sshin if (nq->rip6_plen == sizeof(struct in6_addr) * 8) 141555163Sshin rrt->rrt_flags |= RTF_HOST; 141655163Sshin 141755163Sshin /* Update routing table */ 141855163Sshin addroute(rrt, &nh, ifcp); 141962607Sitojun rrt->rrt_rflags |= RRTF_CHANGED; 142055163Sshin need_trigger = 1; 142155163Sshin rrt->rrt_t = t; 1422243232Shrs 1423243232Shrs /* Put the route to the list */ 1424243232Shrs TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next); 142555163Sshin } 142655163Sshin } 142755163Sshin /* XXX need to care the interval between triggered updates */ 142855163Sshin if (need_trigger) { 142955163Sshin if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) { 1430243232Shrs TAILQ_FOREACH(ic, &ifc_head, ifc_next) { 143155163Sshin if (ifcp->ifc_index == ic->ifc_index) 143255163Sshin continue; 143355163Sshin if (ic->ifc_flags & IFF_UP) 143455163Sshin ripsend(ic, &ic->ifc_ripsin, 143562607Sitojun RRTF_CHANGED); 143655163Sshin } 143755163Sshin } 143855163Sshin /* Reset the flag */ 1439243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 144062607Sitojun rrt->rrt_rflags &= ~RRTF_CHANGED; 1441243232Shrs } 144255163Sshin } 144355163Sshin} 144455163Sshin 144555163Sshin/* 144655163Sshin * Send all routes request packet to the specified interface. 144755163Sshin */ 144855163Sshinvoid 1449243232Shrssendrequest(struct ifc *ifcp) 145055163Sshin{ 145155163Sshin struct netinfo6 *np; 145255163Sshin int error; 145355163Sshin 145455163Sshin if (ifcp->ifc_flags & IFF_LOOPBACK) 145555163Sshin return; 145655163Sshin ripbuf->rip6_cmd = RIP6_REQUEST; 145755163Sshin np = ripbuf->rip6_nets; 145855163Sshin memset(np, 0, sizeof(struct netinfo6)); 145955163Sshin np->rip6_metric = HOPCNT_INFINITY6; 146055163Sshin tracet(1, "Send rtdump Request to %s (%s)\n", 146155163Sshin ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 146255163Sshin error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1)); 146355163Sshin if (error == EAFNOSUPPORT) { 146455163Sshin /* Protocol not supported */ 146555163Sshin tracet(1, "Could not send rtdump Request to %s (%s): " 146655163Sshin "set IFF_UP to 0\n", 146755163Sshin ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 146855163Sshin ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 146955163Sshin } 147055163Sshin ripbuf->rip6_cmd = RIP6_RESPONSE; 147155163Sshin} 147255163Sshin 147355163Sshin/* 147455163Sshin * Process a RIP6_REQUEST packet. 147555163Sshin */ 147655163Sshinvoid 1477243232Shrsriprequest(struct ifc *ifcp, 1478243232Shrs struct netinfo6 *np, 1479243232Shrs int nn, 1480243232Shrs struct sockaddr_in6 *sin6) 148155163Sshin{ 148255163Sshin int i; 148355163Sshin struct riprt *rrt; 148455163Sshin 148555163Sshin if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) && 148655163Sshin np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) { 148755163Sshin /* Specific response, don't split-horizon */ 148855163Sshin trace(1, "\tRIP Request\n"); 148955163Sshin for (i = 0; i < nn; i++, np++) { 1490243232Shrs rrt = rtsearch(np); 149155163Sshin if (rrt) 149255163Sshin np->rip6_metric = rrt->rrt_info.rip6_metric; 149355163Sshin else 149455163Sshin np->rip6_metric = HOPCNT_INFINITY6; 149555163Sshin } 1496119031Sume (void)sendpacket(sin6, RIPSIZE(nn)); 149755163Sshin return; 149855163Sshin } 149955163Sshin /* Whole routing table dump */ 150055163Sshin trace(1, "\tRIP Request -- whole routing table\n"); 1501119031Sume ripsend(ifcp, sin6, RRTF_SENDANYWAY); 150255163Sshin} 150355163Sshin 150455163Sshin/* 150555163Sshin * Get information of each interface. 150655163Sshin */ 150755163Sshinvoid 1508243232Shrsifconfig(void) 150955163Sshin{ 151062607Sitojun struct ifaddrs *ifap, *ifa; 151162607Sitojun struct ifc *ifcp; 151262607Sitojun struct ipv6_mreq mreq; 151362607Sitojun int s; 151462607Sitojun 151578064Sume if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 151662607Sitojun fatal("socket"); 151778064Sume /*NOTREACHED*/ 151878064Sume } 151962607Sitojun 152078064Sume if (getifaddrs(&ifap) != 0) { 152162607Sitojun fatal("getifaddrs"); 152278064Sume /*NOTREACHED*/ 152378064Sume } 152462607Sitojun 152562607Sitojun for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 152662607Sitojun if (ifa->ifa_addr->sa_family != AF_INET6) 152762607Sitojun continue; 152862607Sitojun ifcp = ifc_find(ifa->ifa_name); 152962607Sitojun /* we are interested in multicast-capable interfaces */ 153062607Sitojun if ((ifa->ifa_flags & IFF_MULTICAST) == 0) 153162607Sitojun continue; 153262607Sitojun if (!ifcp) { 153362607Sitojun /* new interface */ 153478064Sume if ((ifcp = MALLOC(struct ifc)) == NULL) { 153562607Sitojun fatal("malloc: struct ifc"); 153678064Sume /*NOTREACHED*/ 153778064Sume } 153862607Sitojun memset(ifcp, 0, sizeof(*ifcp)); 1539243232Shrs 154062607Sitojun ifcp->ifc_index = -1; 1541243232Shrs strlcpy(ifcp->ifc_name, ifa->ifa_name, 1542243232Shrs sizeof(ifcp->ifc_name)); 1543243232Shrs TAILQ_INIT(&ifcp->ifc_ifac_head); 1544243232Shrs TAILQ_INIT(&ifcp->ifc_iff_head); 154562607Sitojun ifcp->ifc_flags = ifa->ifa_flags; 1546243232Shrs TAILQ_INSERT_HEAD(&ifc_head, ifcp, ifc_next); 154762607Sitojun trace(1, "newif %s <%s>\n", ifcp->ifc_name, 154862607Sitojun ifflags(ifcp->ifc_flags)); 154962607Sitojun if (!strcmp(ifcp->ifc_name, LOOPBACK_IF)) 155062607Sitojun loopifcp = ifcp; 155162607Sitojun } else { 155262607Sitojun /* update flag, this may be up again */ 155362607Sitojun if (ifcp->ifc_flags != ifa->ifa_flags) { 155462607Sitojun trace(1, "%s: <%s> -> ", ifcp->ifc_name, 155562607Sitojun ifflags(ifcp->ifc_flags)); 155662607Sitojun trace(1, "<%s>\n", ifflags(ifa->ifa_flags)); 155778064Sume ifcp->ifc_cflags |= IFC_CHANGED; 155862607Sitojun } 155962607Sitojun ifcp->ifc_flags = ifa->ifa_flags; 156062607Sitojun } 1561243232Shrs if (ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s) < 0) { 1562243232Shrs /* maybe temporary failure */ 1563243232Shrs continue; 1564243232Shrs } 156562607Sitojun if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP 156662607Sitojun && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { 156762607Sitojun mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; 156862607Sitojun mreq.ipv6mr_interface = ifcp->ifc_index; 156978064Sume if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_JOIN_GROUP, 157078064Sume &mreq, sizeof(mreq)) < 0) { 157162607Sitojun fatal("IPV6_JOIN_GROUP"); 157278064Sume /*NOTREACHED*/ 157378064Sume } 157462607Sitojun trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST); 157562607Sitojun ifcp->ifc_joined++; 157662607Sitojun } 157762607Sitojun } 157862607Sitojun close(s); 157962607Sitojun freeifaddrs(ifap); 158055163Sshin} 158155163Sshin 1582243232Shrsint 1583243232Shrsifconfig1(const char *name, 1584243232Shrs const struct sockaddr *sa, 1585243232Shrs struct ifc *ifcp, 1586243232Shrs int s) 158755163Sshin{ 158855163Sshin struct in6_ifreq ifr; 1589119031Sume const struct sockaddr_in6 *sin6; 1590243232Shrs struct ifac *ifac; 159155163Sshin int plen; 159255163Sshin char buf[BUFSIZ]; 159355163Sshin 1594119031Sume sin6 = (const struct sockaddr_in6 *)sa; 1595122677Sume if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && !lflag) 1596243232Shrs return (-1); 1597119031Sume ifr.ifr_addr = *sin6; 1598119032Sume strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 159978064Sume if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) { 1600243232Shrs syslog(LOG_INFO, "ioctl: SIOCGIFNETMASK_IN6"); 1601243232Shrs return (-1); 160278064Sume } 160378064Sume plen = sin6mask2len(&ifr.ifr_addr); 1604243232Shrs if ((ifac = ifa_match(ifcp, &sin6->sin6_addr, plen)) != NULL) { 160555163Sshin /* same interface found */ 160655163Sshin /* need check if something changed */ 160755163Sshin /* XXX not yet implemented */ 1608243232Shrs return (-1); 160955163Sshin } 161055163Sshin /* 161155163Sshin * New address is found 161255163Sshin */ 1613243232Shrs if ((ifac = MALLOC(struct ifac)) == NULL) { 161455163Sshin fatal("malloc: struct ifac"); 161578064Sume /*NOTREACHED*/ 161678064Sume } 1617243232Shrs memset(ifac, 0, sizeof(*ifac)); 1618243232Shrs 1619243232Shrs ifac->ifac_ifc = ifcp; 1620243232Shrs ifac->ifac_addr = sin6->sin6_addr; 1621243232Shrs ifac->ifac_plen = plen; 1622243232Shrs ifac->ifac_scope_id = sin6->sin6_scope_id; 162355163Sshin if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1624119031Sume ifr.ifr_addr = *sin6; 162578064Sume if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) { 162655163Sshin fatal("ioctl: SIOCGIFDSTADDR_IN6"); 162778064Sume /*NOTREACHED*/ 162878064Sume } 1629243232Shrs ifac->ifac_raddr = ifr.ifr_dstaddr.sin6_addr; 1630243232Shrs inet_ntop(AF_INET6, (void *)&ifac->ifac_raddr, buf, 1631243232Shrs sizeof(buf)); 163255163Sshin trace(1, "found address %s/%d -- %s\n", 1633243232Shrs inet6_n2p(&ifac->ifac_addr), ifac->ifac_plen, buf); 163455163Sshin } else { 163555163Sshin trace(1, "found address %s/%d\n", 1636243232Shrs inet6_n2p(&ifac->ifac_addr), ifac->ifac_plen); 163755163Sshin } 1638243232Shrs if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifac->ifac_addr)) { 1639243232Shrs ifcp->ifc_mylladdr = ifac->ifac_addr; 1640243232Shrs ifcp->ifc_index = ifac->ifac_scope_id; 164155163Sshin memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len); 1642243231Shrs ifcp->ifc_ripsin.sin6_scope_id = ifcp->ifc_index; 164355163Sshin setindex2ifc(ifcp->ifc_index, ifcp); 164455163Sshin ifcp->ifc_mtu = getifmtu(ifcp->ifc_index); 164555163Sshin if (ifcp->ifc_mtu > RIP6_MAXMTU) 164655163Sshin ifcp->ifc_mtu = RIP6_MAXMTU; 164778064Sume if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) { 164855163Sshin fatal("ioctl: SIOCGIFMETRIC"); 164978064Sume /*NOTREACHED*/ 165078064Sume } 165155163Sshin ifcp->ifc_metric = ifr.ifr_metric; 165255163Sshin trace(1, "\tindex: %d, mtu: %d, metric: %d\n", 165355163Sshin ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric); 165478064Sume } else 165578064Sume ifcp->ifc_cflags |= IFC_CHANGED; 1656243232Shrs 1657243232Shrs TAILQ_INSERT_HEAD(&ifcp->ifc_ifac_head, ifac, ifac_next); 1658243232Shrs 1659243232Shrs return 0; 166055163Sshin} 166155163Sshin 1662243233Shrsvoid 1663243233Shrsifremove(int ifindex) 1664243233Shrs{ 1665243233Shrs struct ifc *ifcp; 1666243233Shrs struct riprt *rrt; 1667243233Shrs 1668243233Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 1669243233Shrs if (ifcp->ifc_index == ifindex) 1670243233Shrs break; 1671243233Shrs } 1672243233Shrs if (ifcp == NULL) 1673243233Shrs return; 1674243233Shrs 1675243233Shrs tracet(1, "ifremove: %s is departed.\n", ifcp->ifc_name); 1676243233Shrs TAILQ_REMOVE(&ifc_head, ifcp, ifc_next); 1677243233Shrs 1678243233Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 1679243233Shrs if (rrt->rrt_index == ifcp->ifc_index && 1680243233Shrs rrt->rrt_rflags & RRTF_AGGREGATE) 1681243233Shrs delroute(&rrt->rrt_info, &rrt->rrt_gw); 1682243233Shrs } 1683243233Shrs free(ifcp); 1684243233Shrs} 1685243233Shrs 168655163Sshin/* 168755163Sshin * Receive and process routing messages. 168855163Sshin * Update interface information as necesssary. 168955163Sshin */ 169055163Sshinvoid 1691243232Shrsrtrecv(void) 169255163Sshin{ 169355163Sshin char buf[BUFSIZ]; 1694243232Shrs char *p, *q = NULL; 169555163Sshin struct rt_msghdr *rtm; 169655163Sshin struct ifa_msghdr *ifam; 169755163Sshin struct if_msghdr *ifm; 1698243233Shrs struct if_announcemsghdr *ifan; 169955163Sshin int len; 170078064Sume struct ifc *ifcp, *ic; 170155163Sshin int iface = 0, rtable = 0; 170255163Sshin struct sockaddr_in6 *rta[RTAX_MAX]; 170378064Sume struct sockaddr_in6 mask; 1704243232Shrs int i, addrs = 0; 170578064Sume struct riprt *rrt; 170655163Sshin 170755163Sshin if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 170855163Sshin perror("read from rtsock"); 170978064Sume exit(1); 171055163Sshin } 1711243232Shrs if (len == 0) 1712243232Shrs return; 1713243232Shrs#if 0 171455163Sshin if (len < sizeof(*rtm)) { 171569279Sume trace(1, "short read from rtsock: %d (should be > %lu)\n", 171669279Sume len, (u_long)sizeof(*rtm)); 171755163Sshin return; 171855163Sshin } 1719243232Shrs#endif 1720119042Sume if (dflag >= 2) { 1721119042Sume fprintf(stderr, "rtmsg:\n"); 1722119042Sume for (i = 0; i < len; i++) { 1723119042Sume fprintf(stderr, "%02x ", buf[i] & 0xff); 1724119042Sume if (i % 16 == 15) fprintf(stderr, "\n"); 1725119042Sume } 1726119042Sume fprintf(stderr, "\n"); 1727119042Sume } 172855163Sshin 172955163Sshin for (p = buf; p - buf < len; p += ((struct rt_msghdr *)p)->rtm_msglen) { 1730243232Shrs if (((struct rt_msghdr *)p)->rtm_version != RTM_VERSION) 1731243232Shrs continue; 1732243232Shrs 173355163Sshin /* safety against bogus message */ 173455163Sshin if (((struct rt_msghdr *)p)->rtm_msglen <= 0) { 173555163Sshin trace(1, "bogus rtmsg: length=%d\n", 173655163Sshin ((struct rt_msghdr *)p)->rtm_msglen); 173755163Sshin break; 173855163Sshin } 173955163Sshin rtm = NULL; 174055163Sshin ifam = NULL; 174155163Sshin ifm = NULL; 174255163Sshin switch (((struct rt_msghdr *)p)->rtm_type) { 174355163Sshin case RTM_NEWADDR: 174455163Sshin case RTM_DELADDR: 174555163Sshin ifam = (struct ifa_msghdr *)p; 174655163Sshin addrs = ifam->ifam_addrs; 174755163Sshin q = (char *)(ifam + 1); 174855163Sshin break; 174955163Sshin case RTM_IFINFO: 175055163Sshin ifm = (struct if_msghdr *)p; 175155163Sshin addrs = ifm->ifm_addrs; 175255163Sshin q = (char *)(ifm + 1); 175355163Sshin break; 1754243233Shrs case RTM_IFANNOUNCE: 1755243233Shrs ifan = (struct if_announcemsghdr *)p; 1756243233Shrs switch (ifan->ifan_what) { 1757243233Shrs case IFAN_ARRIVAL: 1758243233Shrs iface++; 1759243233Shrs break; 1760243233Shrs case IFAN_DEPARTURE: 1761243233Shrs ifremove(ifan->ifan_index); 1762243233Shrs iface++; 1763243233Shrs break; 1764243233Shrs } 1765243233Shrs break; 176655163Sshin default: 176755163Sshin rtm = (struct rt_msghdr *)p; 176855163Sshin addrs = rtm->rtm_addrs; 176955163Sshin q = (char *)(rtm + 1); 177055163Sshin if (rtm->rtm_version != RTM_VERSION) { 177155163Sshin trace(1, "unexpected rtmsg version %d " 177255163Sshin "(should be %d)\n", 177355163Sshin rtm->rtm_version, RTM_VERSION); 177455163Sshin continue; 177555163Sshin } 177655163Sshin if (rtm->rtm_pid == pid) { 177755163Sshin#if 0 177855163Sshin trace(1, "rtmsg looped back to me, ignored\n"); 177955163Sshin#endif 178055163Sshin continue; 178155163Sshin } 178255163Sshin break; 178355163Sshin } 178455163Sshin memset(&rta, 0, sizeof(rta)); 178555163Sshin for (i = 0; i < RTAX_MAX; i++) { 178655163Sshin if (addrs & (1 << i)) { 178755163Sshin rta[i] = (struct sockaddr_in6 *)q; 178855163Sshin q += ROUNDUP(rta[i]->sin6_len); 178955163Sshin } 179055163Sshin } 179155163Sshin 179255163Sshin trace(1, "rtsock: %s (addrs=%x)\n", 179355163Sshin rttypes((struct rt_msghdr *)p), addrs); 179455163Sshin if (dflag >= 2) { 179555163Sshin for (i = 0; 179655163Sshin i < ((struct rt_msghdr *)p)->rtm_msglen; 179755163Sshin i++) { 179855163Sshin fprintf(stderr, "%02x ", p[i] & 0xff); 179955163Sshin if (i % 16 == 15) fprintf(stderr, "\n"); 180055163Sshin } 180155163Sshin fprintf(stderr, "\n"); 180255163Sshin } 180355163Sshin 180455163Sshin /* 180555163Sshin * Easy ones first. 180655163Sshin * 180755163Sshin * We may be able to optimize by using ifm->ifm_index or 180855163Sshin * ifam->ifam_index. For simplicity we don't do that here. 180955163Sshin */ 181055163Sshin switch (((struct rt_msghdr *)p)->rtm_type) { 181155163Sshin case RTM_NEWADDR: 181255163Sshin case RTM_IFINFO: 181355163Sshin iface++; 181455163Sshin continue; 181555163Sshin case RTM_ADD: 181655163Sshin rtable++; 181755163Sshin continue; 181855163Sshin case RTM_LOSING: 181955163Sshin case RTM_MISS: 182055163Sshin case RTM_GET: 182155163Sshin case RTM_LOCK: 182255163Sshin /* nothing to be done here */ 182355163Sshin trace(1, "\tnothing to be done, ignored\n"); 182455163Sshin continue; 182555163Sshin } 182655163Sshin 182755163Sshin#if 0 182855163Sshin if (rta[RTAX_DST] == NULL) { 182955163Sshin trace(1, "\tno destination, ignored\n"); 183062607Sitojun continue; 183155163Sshin } 183255163Sshin if (rta[RTAX_DST]->sin6_family != AF_INET6) { 183355163Sshin trace(1, "\taf mismatch, ignored\n"); 183455163Sshin continue; 183555163Sshin } 183655163Sshin if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) { 183755163Sshin trace(1, "\tlinklocal destination, ignored\n"); 183855163Sshin continue; 183955163Sshin } 184055163Sshin if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) { 184155163Sshin trace(1, "\tloopback destination, ignored\n"); 184255163Sshin continue; /* Loopback */ 184355163Sshin } 184455163Sshin if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) { 184555163Sshin trace(1, "\tmulticast destination, ignored\n"); 184655163Sshin continue; 184755163Sshin } 184855163Sshin#endif 184955163Sshin 185055163Sshin /* hard ones */ 185155163Sshin switch (((struct rt_msghdr *)p)->rtm_type) { 185255163Sshin case RTM_NEWADDR: 185355163Sshin case RTM_IFINFO: 185455163Sshin case RTM_ADD: 185555163Sshin case RTM_LOSING: 185655163Sshin case RTM_MISS: 185755163Sshin case RTM_GET: 185855163Sshin case RTM_LOCK: 185955163Sshin /* should already be handled */ 186055163Sshin fatal("rtrecv: never reach here"); 186178064Sume /*NOTREACHED*/ 186255163Sshin case RTM_DELETE: 186378064Sume if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY]) { 186478064Sume trace(1, "\tsome of dst/gw/netamsk are " 186578064Sume "unavailable, ignored\n"); 186655163Sshin break; 186755163Sshin } 186878064Sume if ((rtm->rtm_flags & RTF_HOST) != 0) { 186978064Sume mask.sin6_len = sizeof(mask); 187078064Sume memset(&mask.sin6_addr, 0xff, 187178064Sume sizeof(mask.sin6_addr)); 187278064Sume rta[RTAX_NETMASK] = &mask; 187378064Sume } else if (!rta[RTAX_NETMASK]) { 187478064Sume trace(1, "\tsome of dst/gw/netamsk are " 187578064Sume "unavailable, ignored\n"); 187678064Sume break; 187778064Sume } 187878064Sume if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY], 187978064Sume rta[RTAX_NETMASK]) == 0) { 188055163Sshin rtable++; /*just to be sure*/ 188155163Sshin } 188255163Sshin break; 188355163Sshin case RTM_CHANGE: 188455163Sshin case RTM_REDIRECT: 188555163Sshin trace(1, "\tnot supported yet, ignored\n"); 188655163Sshin break; 188755163Sshin case RTM_DELADDR: 188855163Sshin if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) { 188955163Sshin trace(1, "\tno netmask or ifa given, ignored\n"); 189055163Sshin break; 189155163Sshin } 189255163Sshin if (ifam->ifam_index < nindex2ifc) 189355163Sshin ifcp = index2ifc[ifam->ifam_index]; 189455163Sshin else 189555163Sshin ifcp = NULL; 189655163Sshin if (!ifcp) { 189755163Sshin trace(1, "\tinvalid ifam_index %d, ignored\n", 189855163Sshin ifam->ifam_index); 189955163Sshin break; 190055163Sshin } 190178064Sume if (!rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK])) 190278064Sume iface++; 190355163Sshin break; 190455163Sshin case RTM_OLDADD: 190555163Sshin case RTM_OLDDEL: 190655163Sshin trace(1, "\tnot supported yet, ignored\n"); 190755163Sshin break; 190855163Sshin } 190955163Sshin 191055163Sshin } 191155163Sshin 191255163Sshin if (iface) { 191355163Sshin trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n"); 191455163Sshin ifconfig(); 1915243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 191678064Sume if (ifcp->ifc_cflags & IFC_CHANGED) { 191778064Sume if (ifrt(ifcp, 1)) { 1918243232Shrs TAILQ_FOREACH(ic, &ifc_head, ifc_next) { 191978064Sume if (ifcp->ifc_index == ic->ifc_index) 192078064Sume continue; 192178064Sume if (ic->ifc_flags & IFF_UP) 192278064Sume ripsend(ic, &ic->ifc_ripsin, 192378064Sume RRTF_CHANGED); 192478064Sume } 192578064Sume /* Reset the flag */ 1926243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 192778064Sume rrt->rrt_rflags &= ~RRTF_CHANGED; 1928243232Shrs } 192978064Sume } 193078064Sume ifcp->ifc_cflags &= ~IFC_CHANGED; 193178064Sume } 1932243232Shrs } 193355163Sshin } 193455163Sshin if (rtable) { 193555163Sshin trace(1, "rtsock: read routing table again\n"); 193655163Sshin krtread(1); 193755163Sshin } 193855163Sshin} 193955163Sshin 194055163Sshin/* 194155163Sshin * remove specified route from the internal routing table. 194255163Sshin */ 194355163Sshinint 1944243232Shrsrt_del(const struct sockaddr_in6 *sdst, 1945243232Shrs const struct sockaddr_in6 *sgw, 1946243232Shrs const struct sockaddr_in6 *smask) 194755163Sshin{ 194855163Sshin const struct in6_addr *dst = NULL; 194955163Sshin const struct in6_addr *gw = NULL; 195055163Sshin int prefix; 195155163Sshin struct netinfo6 ni6; 195255163Sshin struct riprt *rrt = NULL; 195355163Sshin time_t t_lifetime; 195455163Sshin 195555163Sshin if (sdst->sin6_family != AF_INET6) { 195655163Sshin trace(1, "\tother AF, ignored\n"); 195755163Sshin return -1; 195855163Sshin } 195955163Sshin if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr) 196055163Sshin || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback) 196155163Sshin || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) { 196255163Sshin trace(1, "\taddress %s not interesting, ignored\n", 196355163Sshin inet6_n2p(&sdst->sin6_addr)); 196455163Sshin return -1; 196555163Sshin } 196655163Sshin dst = &sdst->sin6_addr; 196778064Sume if (sgw->sin6_family == AF_INET6) { 196855163Sshin /* easy case */ 196955163Sshin gw = &sgw->sin6_addr; 197078064Sume prefix = sin6mask2len(smask); 197155163Sshin } else if (sgw->sin6_family == AF_LINK) { 197255163Sshin /* 197355163Sshin * Interface route... a hard case. We need to get the prefix 197455163Sshin * length from the kernel, but we now are parsing rtmsg. 197555163Sshin * We'll purge matching routes from my list, then get the 197655163Sshin * fresh list. 197755163Sshin */ 197855163Sshin struct riprt *longest; 1979108533Sschweikh trace(1, "\t%s is an interface route, guessing prefixlen\n", 198055163Sshin inet6_n2p(dst)); 198155163Sshin longest = NULL; 1982243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 198355163Sshin if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 198455163Sshin &sdst->sin6_addr) 198555163Sshin && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) { 198655163Sshin if (!longest 198755163Sshin || longest->rrt_info.rip6_plen < 198855163Sshin rrt->rrt_info.rip6_plen) { 198955163Sshin longest = rrt; 199055163Sshin } 199155163Sshin } 199255163Sshin } 199355163Sshin rrt = longest; 199455163Sshin if (!rrt) { 199555163Sshin trace(1, "\tno matching interface route found\n"); 199655163Sshin return -1; 199755163Sshin } 199855163Sshin gw = &in6addr_loopback; 199955163Sshin prefix = rrt->rrt_info.rip6_plen; 200055163Sshin } else { 200178064Sume trace(1, "\tunsupported af: (gw=%d)\n", sgw->sin6_family); 200255163Sshin return -1; 200355163Sshin } 200455163Sshin 200555163Sshin trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix); 200655163Sshin trace(1, "gw %s\n", inet6_n2p(gw)); 200755163Sshin t_lifetime = time(NULL) - RIP_LIFETIME; 200855163Sshin /* age route for interface address */ 200955163Sshin memset(&ni6, 0, sizeof(ni6)); 201055163Sshin ni6.rip6_dest = *dst; 201155163Sshin ni6.rip6_plen = prefix; 201255163Sshin applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 201355163Sshin trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest), 201455163Sshin ni6.rip6_plen); 2015243232Shrs if (!rrt && (rrt = rtsearch(&ni6)) == NULL) { 201655163Sshin trace(1, "\tno route found\n"); 201755163Sshin return -1; 201855163Sshin } 201978064Sume#if 0 202055163Sshin if ((rrt->rrt_flags & RTF_STATIC) == 0) { 202155163Sshin trace(1, "\tyou can delete static routes only\n"); 202278064Sume } else 202378064Sume#endif 202478064Sume if (!IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, gw)) { 202555163Sshin trace(1, "\tgw mismatch: %s <-> ", 202655163Sshin inet6_n2p(&rrt->rrt_gw)); 202755163Sshin trace(1, "%s\n", inet6_n2p(gw)); 202855163Sshin } else { 202955163Sshin trace(1, "\troute found, age it\n"); 203055163Sshin if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 203155163Sshin rrt->rrt_t = t_lifetime; 203255163Sshin rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 203355163Sshin } 203455163Sshin } 203555163Sshin return 0; 203655163Sshin} 203755163Sshin 203855163Sshin/* 203955163Sshin * remove specified address from internal interface/routing table. 204055163Sshin */ 204155163Sshinint 2042243232Shrsrt_deladdr(struct ifc *ifcp, 2043243232Shrs const struct sockaddr_in6 *sifa, 2044243232Shrs const struct sockaddr_in6 *smask) 204555163Sshin{ 204655163Sshin const struct in6_addr *addr = NULL; 204755163Sshin int prefix; 2048243232Shrs struct ifac *ifac = NULL; 204955163Sshin struct netinfo6 ni6; 205055163Sshin struct riprt *rrt = NULL; 205155163Sshin time_t t_lifetime; 205255163Sshin int updated = 0; 205355163Sshin 205478064Sume if (sifa->sin6_family != AF_INET6) { 205555163Sshin trace(1, "\tother AF, ignored\n"); 205655163Sshin return -1; 205755163Sshin } 205855163Sshin addr = &sifa->sin6_addr; 205978064Sume prefix = sin6mask2len(smask); 206055163Sshin 206155163Sshin trace(1, "\tdeleting %s/%d from %s\n", 206255163Sshin inet6_n2p(addr), prefix, ifcp->ifc_name); 2063243232Shrs ifac = ifa_match(ifcp, addr, prefix); 2064243232Shrs if (!ifac) { 206555163Sshin trace(1, "\tno matching ifa found for %s/%d on %s\n", 206655163Sshin inet6_n2p(addr), prefix, ifcp->ifc_name); 206755163Sshin return -1; 206855163Sshin } 2069243232Shrs if (ifac->ifac_ifc != ifcp) { 207055163Sshin trace(1, "\taddress table corrupt: back pointer does not match " 207155163Sshin "(%s != %s)\n", 2072243232Shrs ifcp->ifc_name, ifac->ifac_ifc->ifc_name); 207355163Sshin return -1; 207455163Sshin } 2075243232Shrs TAILQ_REMOVE(&ifcp->ifc_ifac_head, ifac, ifac_next); 207655163Sshin t_lifetime = time(NULL) - RIP_LIFETIME; 207755163Sshin /* age route for interface address */ 207855163Sshin memset(&ni6, 0, sizeof(ni6)); 2079243232Shrs ni6.rip6_dest = ifac->ifac_addr; 2080243232Shrs ni6.rip6_plen = ifac->ifac_plen; 208155163Sshin applyplen(&ni6.rip6_dest, ni6.rip6_plen); 208255163Sshin trace(1, "\tfind interface route %s/%d on %d\n", 208355163Sshin inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index); 2084243232Shrs if ((rrt = rtsearch(&ni6)) != NULL) { 208555163Sshin struct in6_addr none; 208655163Sshin memset(&none, 0, sizeof(none)); 208778064Sume if (rrt->rrt_index == ifcp->ifc_index && 208878064Sume (IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &none) || 208978064Sume IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw))) { 209055163Sshin trace(1, "\troute found, age it\n"); 209155163Sshin if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 209255163Sshin rrt->rrt_t = t_lifetime; 209355163Sshin rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 209455163Sshin } 209555163Sshin updated++; 209655163Sshin } else { 209755163Sshin trace(1, "\tnon-interface route found: %s/%d on %d\n", 209855163Sshin inet6_n2p(&rrt->rrt_info.rip6_dest), 209955163Sshin rrt->rrt_info.rip6_plen, 210055163Sshin rrt->rrt_index); 210155163Sshin } 210255163Sshin } else 210355163Sshin trace(1, "\tno interface route found\n"); 210455163Sshin /* age route for p2p destination */ 210555163Sshin if (ifcp->ifc_flags & IFF_POINTOPOINT) { 210655163Sshin memset(&ni6, 0, sizeof(ni6)); 2107243232Shrs ni6.rip6_dest = ifac->ifac_raddr; 210855163Sshin ni6.rip6_plen = 128; 210955163Sshin applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 211055163Sshin trace(1, "\tfind p2p route %s/%d on %d\n", 211155163Sshin inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, 211255163Sshin ifcp->ifc_index); 2113243232Shrs if ((rrt = rtsearch(&ni6)) != NULL) { 211478064Sume if (rrt->rrt_index == ifcp->ifc_index && 2115243232Shrs IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, 2116243232Shrs &ifac->ifac_addr)) { 211755163Sshin trace(1, "\troute found, age it\n"); 211855163Sshin if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 211955163Sshin rrt->rrt_t = t_lifetime; 212055163Sshin rrt->rrt_info.rip6_metric = 212178064Sume HOPCNT_INFINITY6; 212255163Sshin updated++; 212355163Sshin } 212455163Sshin } else { 212555163Sshin trace(1, "\tnon-p2p route found: %s/%d on %d\n", 212655163Sshin inet6_n2p(&rrt->rrt_info.rip6_dest), 212755163Sshin rrt->rrt_info.rip6_plen, 212855163Sshin rrt->rrt_index); 212955163Sshin } 213055163Sshin } else 213155163Sshin trace(1, "\tno p2p route found\n"); 213255163Sshin } 2133243232Shrs free(ifac); 2134243232Shrs 2135243232Shrs return ((updated) ? 0 : -1); 213655163Sshin} 213755163Sshin 213855163Sshin/* 213955163Sshin * Get each interface address and put those interface routes to the route 214055163Sshin * list. 214155163Sshin */ 214278064Sumeint 2143243232Shrsifrt(struct ifc *ifcp, int again) 214455163Sshin{ 2145243232Shrs struct ifac *ifac; 2146243232Shrs struct riprt *rrt = NULL, *search_rrt, *loop_rrt; 214762607Sitojun struct netinfo6 *np; 214878064Sume time_t t_lifetime; 214978064Sume int need_trigger = 0; 215055163Sshin 2151122677Sume#if 0 215255163Sshin if (ifcp->ifc_flags & IFF_LOOPBACK) 215378064Sume return 0; /* ignore loopback */ 2154122677Sume#endif 2155122677Sume 215662607Sitojun if (ifcp->ifc_flags & IFF_POINTOPOINT) { 215762607Sitojun ifrt_p2p(ifcp, again); 215878064Sume return 0; 215962607Sitojun } 216062607Sitojun 2161243232Shrs TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) { 2162243232Shrs if (IN6_IS_ADDR_LINKLOCAL(&ifac->ifac_addr)) { 216362607Sitojun#if 0 216462607Sitojun trace(1, "route: %s on %s: " 216562607Sitojun "skip linklocal interface address\n", 2166243232Shrs inet6_n2p(&ifac->ifac_addr), ifcp->ifc_name); 216762607Sitojun#endif 216862607Sitojun continue; 216962607Sitojun } 2170243232Shrs if (IN6_IS_ADDR_UNSPECIFIED(&ifac->ifac_addr)) { 217162607Sitojun#if 0 217262607Sitojun trace(1, "route: %s: skip unspec interface address\n", 217362607Sitojun ifcp->ifc_name); 217462607Sitojun#endif 217562607Sitojun continue; 217662607Sitojun } 2177243232Shrs if (IN6_IS_ADDR_LOOPBACK(&ifac->ifac_addr)) { 2178122677Sume#if 0 2179122677Sume trace(1, "route: %s: skip loopback address\n", 2180122677Sume ifcp->ifc_name); 2181122677Sume#endif 2182122677Sume continue; 2183122677Sume } 218478064Sume if (ifcp->ifc_flags & IFF_UP) { 218578064Sume if ((rrt = MALLOC(struct riprt)) == NULL) 218678064Sume fatal("malloc: struct riprt"); 218778064Sume memset(rrt, 0, sizeof(*rrt)); 218878064Sume rrt->rrt_same = NULL; 218978064Sume rrt->rrt_index = ifcp->ifc_index; 219078064Sume rrt->rrt_t = 0; /* don't age */ 2191243232Shrs rrt->rrt_info.rip6_dest = ifac->ifac_addr; 219278064Sume rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 219378064Sume rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; 2194243232Shrs rrt->rrt_info.rip6_plen = ifac->ifac_plen; 2195186119Sqingli rrt->rrt_flags = RTF_HOST; 219678064Sume rrt->rrt_rflags |= RRTF_CHANGED; 2197243232Shrs applyplen(&rrt->rrt_info.rip6_dest, ifac->ifac_plen); 219878064Sume memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2199243232Shrs rrt->rrt_gw = ifac->ifac_addr; 220078064Sume np = &rrt->rrt_info; 2201243232Shrs search_rrt = rtsearch(np); 220278064Sume if (search_rrt != NULL) { 2203119042Sume if (search_rrt->rrt_info.rip6_metric <= 220478064Sume rrt->rrt_info.rip6_metric) { 220578064Sume /* Already have better route */ 220678064Sume if (!again) { 220778064Sume trace(1, "route: %s/%d: " 220878064Sume "already registered (%s)\n", 220978064Sume inet6_n2p(&np->rip6_dest), np->rip6_plen, 221078064Sume ifcp->ifc_name); 221178064Sume } 2212119042Sume goto next; 221378064Sume } 2214119042Sume 2215243232Shrs TAILQ_REMOVE(&riprt_head, rrt, rrt_next); 2216119042Sume delroute(&rrt->rrt_info, &rrt->rrt_gw); 221778064Sume } 221855163Sshin /* Attach the route to the list */ 221962607Sitojun trace(1, "route: %s/%d: register route (%s)\n", 222062607Sitojun inet6_n2p(&np->rip6_dest), np->rip6_plen, 222162607Sitojun ifcp->ifc_name); 2222243232Shrs TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next); 222378064Sume addroute(rrt, &rrt->rrt_gw, ifcp); 2224119042Sume rrt = NULL; 222578064Sume sendrequest(ifcp); 222678064Sume ripsend(ifcp, &ifcp->ifc_ripsin, 0); 222778064Sume need_trigger = 1; 222855163Sshin } else { 2229243232Shrs TAILQ_FOREACH(loop_rrt, &riprt_head, rrt_next) { 223078064Sume if (loop_rrt->rrt_index == ifcp->ifc_index) { 223178064Sume t_lifetime = time(NULL) - RIP_LIFETIME; 223278064Sume if (loop_rrt->rrt_t == 0 || loop_rrt->rrt_t > t_lifetime) { 223378064Sume loop_rrt->rrt_t = t_lifetime; 223478064Sume loop_rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 223578064Sume loop_rrt->rrt_rflags |= RRTF_CHANGED; 223678064Sume need_trigger = 1; 223778064Sume } 223878064Sume } 223955163Sshin } 224078064Sume } 2241119042Sume next: 2242119042Sume if (rrt) 2243119042Sume free(rrt); 224462607Sitojun } 224578064Sume return need_trigger; 224662607Sitojun} 224755163Sshin 224862607Sitojun/* 224962607Sitojun * there are couple of p2p interface routing models. "behavior" lets 225062607Sitojun * you pick one. it looks that gated behavior fits best with BSDs, 2251119035Sume * since BSD kernels do not look at prefix length on p2p interfaces. 225262607Sitojun */ 225362607Sitojunvoid 2254243232Shrsifrt_p2p(struct ifc *ifcp, int again) 225562607Sitojun{ 2256243232Shrs struct ifac *ifac; 2257243232Shrs struct riprt *rrt, *orrt; 225862607Sitojun struct netinfo6 *np; 225962607Sitojun struct in6_addr addr, dest; 226062607Sitojun int advert, ignore, i; 226162607Sitojun#define P2PADVERT_NETWORK 1 226262607Sitojun#define P2PADVERT_ADDR 2 226362607Sitojun#define P2PADVERT_DEST 4 226462607Sitojun#define P2PADVERT_MAX 4 226562607Sitojun const enum { CISCO, GATED, ROUTE6D } behavior = GATED; 226678064Sume const char *category = ""; 226762607Sitojun const char *noadv; 226862607Sitojun 2269243232Shrs TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) { 2270243232Shrs addr = ifac->ifac_addr; 2271243232Shrs dest = ifac->ifac_raddr; 2272243232Shrs applyplen(&addr, ifac->ifac_plen); 2273243232Shrs applyplen(&dest, ifac->ifac_plen); 227462607Sitojun advert = ignore = 0; 227562607Sitojun switch (behavior) { 227662607Sitojun case CISCO: 227762607Sitojun /* 227862607Sitojun * honor addr/plen, just like normal shared medium 227962607Sitojun * interface. this may cause trouble if you reuse 228062607Sitojun * addr/plen on other interfaces. 228162607Sitojun * 228262607Sitojun * advertise addr/plen. 228362607Sitojun */ 228462607Sitojun advert |= P2PADVERT_NETWORK; 228562607Sitojun break; 228662607Sitojun case GATED: 228762607Sitojun /* 228862607Sitojun * prefixlen on p2p interface is meaningless. 228962607Sitojun * advertise addr/128 and dest/128. 229062607Sitojun * 229162607Sitojun * do not install network route to route6d routing 229262607Sitojun * table (if we do, it would prevent route installation 229362607Sitojun * for other p2p interface that shares addr/plen). 229478064Sume * 229578064Sume * XXX what should we do if dest is ::? it will not 229678064Sume * get announced anyways (see following filter), 229778064Sume * but we need to think. 229862607Sitojun */ 229962607Sitojun advert |= P2PADVERT_ADDR; 230062607Sitojun advert |= P2PADVERT_DEST; 230162607Sitojun ignore |= P2PADVERT_NETWORK; 230262607Sitojun break; 230362607Sitojun case ROUTE6D: 230462607Sitojun /* 230578064Sume * just for testing. actually the code is redundant 230678064Sume * given the current p2p interface address assignment 230778064Sume * rule for kame kernel. 230878064Sume * 230978064Sume * intent: 231078064Sume * A/n -> announce A/n 231178064Sume * A B/n, A and B share prefix -> A/n (= B/n) 231278064Sume * A B/n, do not share prefix -> A/128 and B/128 231378064Sume * actually, A/64 and A B/128 are the only cases 231478064Sume * permitted by the kernel: 231578064Sume * A/64 -> A/64 231678064Sume * A B/128 -> A/128 and B/128 231762607Sitojun */ 2318243232Shrs if (!IN6_IS_ADDR_UNSPECIFIED(&ifac->ifac_raddr)) { 231978064Sume if (IN6_ARE_ADDR_EQUAL(&addr, &dest)) 232078064Sume advert |= P2PADVERT_NETWORK; 232178064Sume else { 232278064Sume advert |= P2PADVERT_ADDR; 232378064Sume advert |= P2PADVERT_DEST; 232478064Sume ignore |= P2PADVERT_NETWORK; 232578064Sume } 232678064Sume } else 232762607Sitojun advert |= P2PADVERT_NETWORK; 232862607Sitojun break; 232962607Sitojun } 233062607Sitojun 233162607Sitojun for (i = 1; i <= P2PADVERT_MAX; i *= 2) { 233262607Sitojun if ((ignore & i) != 0) 233362607Sitojun continue; 233478064Sume if ((rrt = MALLOC(struct riprt)) == NULL) { 233555163Sshin fatal("malloc: struct riprt"); 233678064Sume /*NOTREACHED*/ 233778064Sume } 233862607Sitojun memset(rrt, 0, sizeof(*rrt)); 233955163Sshin rrt->rrt_same = NULL; 234055163Sshin rrt->rrt_index = ifcp->ifc_index; 234162607Sitojun rrt->rrt_t = 0; /* don't age */ 234262607Sitojun switch (i) { 234362607Sitojun case P2PADVERT_NETWORK: 2344243232Shrs rrt->rrt_info.rip6_dest = ifac->ifac_addr; 2345243232Shrs rrt->rrt_info.rip6_plen = ifac->ifac_plen; 234662607Sitojun applyplen(&rrt->rrt_info.rip6_dest, 2347243232Shrs ifac->ifac_plen); 234862607Sitojun category = "network"; 234962607Sitojun break; 235062607Sitojun case P2PADVERT_ADDR: 2351243232Shrs rrt->rrt_info.rip6_dest = ifac->ifac_addr; 235262607Sitojun rrt->rrt_info.rip6_plen = 128; 235378064Sume rrt->rrt_gw = in6addr_loopback; 235462607Sitojun category = "addr"; 235562607Sitojun break; 235662607Sitojun case P2PADVERT_DEST: 2357243232Shrs rrt->rrt_info.rip6_dest = ifac->ifac_raddr; 235862607Sitojun rrt->rrt_info.rip6_plen = 128; 2359243232Shrs rrt->rrt_gw = ifac->ifac_addr; 236062607Sitojun category = "dest"; 236162607Sitojun break; 236262607Sitojun } 236362607Sitojun if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest) || 236462607Sitojun IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)) { 236562607Sitojun#if 0 236662607Sitojun trace(1, "route: %s: skip unspec/linklocal " 236762607Sitojun "(%s on %s)\n", category, ifcp->ifc_name); 236862607Sitojun#endif 236962607Sitojun free(rrt); 237062607Sitojun continue; 237162607Sitojun } 237262607Sitojun if ((advert & i) == 0) { 237362607Sitojun rrt->rrt_rflags |= RRTF_NOADVERTISE; 237462607Sitojun noadv = ", NO-ADV"; 237562607Sitojun } else 237662607Sitojun noadv = ""; 237755163Sshin rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 237862607Sitojun rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; 237955163Sshin np = &rrt->rrt_info; 2380243232Shrs orrt = rtsearch(np); 238178064Sume if (!orrt) { 238255163Sshin /* Attach the route to the list */ 238362607Sitojun trace(1, "route: %s/%d: register route " 238462607Sitojun "(%s on %s%s)\n", 238562607Sitojun inet6_n2p(&np->rip6_dest), np->rip6_plen, 238662607Sitojun category, ifcp->ifc_name, noadv); 2387243232Shrs TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next); 238878064Sume } else if (rrt->rrt_index != orrt->rrt_index || 238978064Sume rrt->rrt_info.rip6_metric != orrt->rrt_info.rip6_metric) { 2390243232Shrs /* replace route */ 2391243232Shrs TAILQ_INSERT_BEFORE(orrt, rrt, rrt_next); 2392243232Shrs TAILQ_REMOVE(&riprt_head, orrt, rrt_next); 239378064Sume free(orrt); 239478064Sume 239578064Sume trace(1, "route: %s/%d: update (%s on %s%s)\n", 239678064Sume inet6_n2p(&np->rip6_dest), np->rip6_plen, 239778064Sume category, ifcp->ifc_name, noadv); 239855163Sshin } else { 239955163Sshin /* Already found */ 240055163Sshin if (!again) { 240162607Sitojun trace(1, "route: %s/%d: " 240262607Sitojun "already registered (%s on %s%s)\n", 240362607Sitojun inet6_n2p(&np->rip6_dest), 240462607Sitojun np->rip6_plen, category, 240562607Sitojun ifcp->ifc_name, noadv); 240655163Sshin } 240755163Sshin free(rrt); 240855163Sshin } 240955163Sshin } 241055163Sshin } 241162607Sitojun#undef P2PADVERT_NETWORK 241262607Sitojun#undef P2PADVERT_ADDR 241362607Sitojun#undef P2PADVERT_DEST 241462607Sitojun#undef P2PADVERT_MAX 241555163Sshin} 241655163Sshin 241755163Sshinint 2418243232Shrsgetifmtu(int ifindex) 241955163Sshin{ 242055163Sshin int mib[6]; 242155163Sshin char *buf; 242255163Sshin size_t msize; 242355163Sshin struct if_msghdr *ifm; 242455163Sshin int mtu; 242555163Sshin 242655163Sshin mib[0] = CTL_NET; 242755163Sshin mib[1] = PF_ROUTE; 242855163Sshin mib[2] = 0; 242955163Sshin mib[3] = AF_INET6; 243055163Sshin mib[4] = NET_RT_IFLIST; 243155163Sshin mib[5] = ifindex; 243278064Sume if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) { 243355163Sshin fatal("sysctl estimate NET_RT_IFLIST"); 243478064Sume /*NOTREACHED*/ 243578064Sume } 243678064Sume if ((buf = malloc(msize)) == NULL) { 243755163Sshin fatal("malloc"); 243878064Sume /*NOTREACHED*/ 243978064Sume } 244078064Sume if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) { 244155163Sshin fatal("sysctl NET_RT_IFLIST"); 244278064Sume /*NOTREACHED*/ 244378064Sume } 244455163Sshin ifm = (struct if_msghdr *)buf; 244555163Sshin mtu = ifm->ifm_data.ifi_mtu; 244678064Sume if (ifindex != ifm->ifm_index) { 244755163Sshin fatal("ifindex does not match with ifm_index"); 244878064Sume /*NOTREACHED*/ 244978064Sume } 245055163Sshin free(buf); 245155163Sshin return mtu; 245255163Sshin} 245355163Sshin 245455163Sshinconst char * 2455243232Shrsrttypes(struct rt_msghdr *rtm) 245655163Sshin{ 245762607Sitojun#define RTTYPE(s, f) \ 245862607Sitojundo { \ 245962607Sitojun if (rtm->rtm_type == (f)) \ 246062607Sitojun return (s); \ 246162607Sitojun} while (0) 246255163Sshin RTTYPE("ADD", RTM_ADD); 246355163Sshin RTTYPE("DELETE", RTM_DELETE); 246455163Sshin RTTYPE("CHANGE", RTM_CHANGE); 246555163Sshin RTTYPE("GET", RTM_GET); 246655163Sshin RTTYPE("LOSING", RTM_LOSING); 246755163Sshin RTTYPE("REDIRECT", RTM_REDIRECT); 246855163Sshin RTTYPE("MISS", RTM_MISS); 246955163Sshin RTTYPE("LOCK", RTM_LOCK); 247055163Sshin RTTYPE("OLDADD", RTM_OLDADD); 247155163Sshin RTTYPE("OLDDEL", RTM_OLDDEL); 247255163Sshin RTTYPE("NEWADDR", RTM_NEWADDR); 247355163Sshin RTTYPE("DELADDR", RTM_DELADDR); 247455163Sshin RTTYPE("IFINFO", RTM_IFINFO); 247578064Sume#ifdef RTM_OLDADD 247678064Sume RTTYPE("OLDADD", RTM_OLDADD); 247778064Sume#endif 247878064Sume#ifdef RTM_OLDDEL 247978064Sume RTTYPE("OLDDEL", RTM_OLDDEL); 248078064Sume#endif 248178064Sume#ifdef RTM_OIFINFO 248278064Sume RTTYPE("OIFINFO", RTM_OIFINFO); 248378064Sume#endif 248478064Sume#ifdef RTM_IFANNOUNCE 248578064Sume RTTYPE("IFANNOUNCE", RTM_IFANNOUNCE); 248678064Sume#endif 248778064Sume#ifdef RTM_NEWMADDR 248878064Sume RTTYPE("NEWMADDR", RTM_NEWMADDR); 248978064Sume#endif 249078064Sume#ifdef RTM_DELMADDR 249178064Sume RTTYPE("DELMADDR", RTM_DELMADDR); 249278064Sume#endif 249355163Sshin#undef RTTYPE 249455163Sshin return NULL; 249555163Sshin} 249655163Sshin 249755163Sshinconst char * 2498243232Shrsrtflags(struct rt_msghdr *rtm) 249955163Sshin{ 250055163Sshin static char buf[BUFSIZ]; 250155163Sshin 250278064Sume /* 250378064Sume * letter conflict should be okay. painful when *BSD diverges... 250478064Sume */ 250578064Sume strlcpy(buf, "", sizeof(buf)); 250662607Sitojun#define RTFLAG(s, f) \ 250762607Sitojundo { \ 250862607Sitojun if (rtm->rtm_flags & (f)) \ 250978064Sume strlcat(buf, (s), sizeof(buf)); \ 251062607Sitojun} while (0) 251155163Sshin RTFLAG("U", RTF_UP); 251255163Sshin RTFLAG("G", RTF_GATEWAY); 251355163Sshin RTFLAG("H", RTF_HOST); 251455163Sshin RTFLAG("R", RTF_REJECT); 251555163Sshin RTFLAG("D", RTF_DYNAMIC); 251655163Sshin RTFLAG("M", RTF_MODIFIED); 251755163Sshin RTFLAG("d", RTF_DONE); 251855163Sshin#ifdef RTF_MASK 251955163Sshin RTFLAG("m", RTF_MASK); 252055163Sshin#endif 2521186119Sqingli#ifdef RTF_CLONING 252255163Sshin RTFLAG("C", RTF_CLONING); 2523186119Sqingli#endif 252478064Sume#ifdef RTF_CLONED 252578064Sume RTFLAG("c", RTF_CLONED); 252678064Sume#endif 252778064Sume#ifdef RTF_PRCLONING 252878064Sume RTFLAG("c", RTF_PRCLONING); 252978064Sume#endif 253078064Sume#ifdef RTF_WASCLONED 253178064Sume RTFLAG("W", RTF_WASCLONED); 253278064Sume#endif 253355163Sshin RTFLAG("X", RTF_XRESOLVE); 2534186119Sqingli#ifdef RTF_LLINFO 253555163Sshin RTFLAG("L", RTF_LLINFO); 2536186119Sqingli#endif 253755163Sshin RTFLAG("S", RTF_STATIC); 253855163Sshin RTFLAG("B", RTF_BLACKHOLE); 253978064Sume#ifdef RTF_PROTO3 254078064Sume RTFLAG("3", RTF_PROTO3); 254178064Sume#endif 254255163Sshin RTFLAG("2", RTF_PROTO2); 254355163Sshin RTFLAG("1", RTF_PROTO1); 254478064Sume#ifdef RTF_BROADCAST 254578064Sume RTFLAG("b", RTF_BROADCAST); 254678064Sume#endif 254778064Sume#ifdef RTF_DEFAULT 254878064Sume RTFLAG("d", RTF_DEFAULT); 254978064Sume#endif 255078064Sume#ifdef RTF_ISAROUTER 255178064Sume RTFLAG("r", RTF_ISAROUTER); 255278064Sume#endif 255378064Sume#ifdef RTF_TUNNEL 255478064Sume RTFLAG("T", RTF_TUNNEL); 255578064Sume#endif 255678064Sume#ifdef RTF_AUTH 255778064Sume RTFLAG("A", RTF_AUTH); 255878064Sume#endif 255978064Sume#ifdef RTF_CRYPT 256078064Sume RTFLAG("E", RTF_CRYPT); 256178064Sume#endif 256255163Sshin#undef RTFLAG 256355163Sshin return buf; 256455163Sshin} 256555163Sshin 256655163Sshinconst char * 2567243232Shrsifflags(int flags) 256855163Sshin{ 256955163Sshin static char buf[BUFSIZ]; 257055163Sshin 257178064Sume strlcpy(buf, "", sizeof(buf)); 257262607Sitojun#define IFFLAG(s, f) \ 257362607Sitojundo { \ 2574119040Sume if (flags & (f)) { \ 257562607Sitojun if (buf[0]) \ 257678064Sume strlcat(buf, ",", sizeof(buf)); \ 2577119040Sume strlcat(buf, (s), sizeof(buf)); \ 257862607Sitojun } \ 257962607Sitojun} while (0) 258055163Sshin IFFLAG("UP", IFF_UP); 258155163Sshin IFFLAG("BROADCAST", IFF_BROADCAST); 258255163Sshin IFFLAG("DEBUG", IFF_DEBUG); 258355163Sshin IFFLAG("LOOPBACK", IFF_LOOPBACK); 258455163Sshin IFFLAG("POINTOPOINT", IFF_POINTOPOINT); 258555163Sshin#ifdef IFF_NOTRAILERS 258655163Sshin IFFLAG("NOTRAILERS", IFF_NOTRAILERS); 258755163Sshin#endif 258878064Sume#ifdef IFF_SMART 258978064Sume IFFLAG("SMART", IFF_SMART); 259078064Sume#endif 259155163Sshin IFFLAG("RUNNING", IFF_RUNNING); 259255163Sshin IFFLAG("NOARP", IFF_NOARP); 259355163Sshin IFFLAG("PROMISC", IFF_PROMISC); 259455163Sshin IFFLAG("ALLMULTI", IFF_ALLMULTI); 259555163Sshin IFFLAG("OACTIVE", IFF_OACTIVE); 259655163Sshin IFFLAG("SIMPLEX", IFF_SIMPLEX); 259755163Sshin IFFLAG("LINK0", IFF_LINK0); 259855163Sshin IFFLAG("LINK1", IFF_LINK1); 259955163Sshin IFFLAG("LINK2", IFF_LINK2); 260055163Sshin IFFLAG("MULTICAST", IFF_MULTICAST); 260155163Sshin#undef IFFLAG 260255163Sshin return buf; 260355163Sshin} 260455163Sshin 260555163Sshinvoid 2606243232Shrskrtread(int again) 260755163Sshin{ 260855163Sshin int mib[6]; 260955163Sshin size_t msize; 261055163Sshin char *buf, *p, *lim; 261155163Sshin struct rt_msghdr *rtm; 261255163Sshin int retry; 261355163Sshin const char *errmsg; 261455163Sshin 261555163Sshin retry = 0; 261655163Sshin buf = NULL; 261755163Sshin mib[0] = CTL_NET; 261855163Sshin mib[1] = PF_ROUTE; 261955163Sshin mib[2] = 0; 262055163Sshin mib[3] = AF_INET6; /* Address family */ 262155163Sshin mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */ 262255163Sshin mib[5] = 0; /* No flags */ 262355163Sshin do { 2624243232Shrs if (retry) 2625243232Shrs sleep(1); 262655163Sshin retry++; 262755163Sshin errmsg = NULL; 262855163Sshin if (buf) 262955163Sshin free(buf); 263055163Sshin if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) { 263155163Sshin errmsg = "sysctl estimate"; 263255163Sshin continue; 263355163Sshin } 263455163Sshin if ((buf = malloc(msize)) == NULL) { 263555163Sshin errmsg = "malloc"; 263655163Sshin continue; 263755163Sshin } 263855163Sshin if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) { 263955163Sshin errmsg = "sysctl NET_RT_DUMP"; 264055163Sshin continue; 264155163Sshin } 2642243233Shrs } while (retry < RT_DUMP_MAXRETRY && errmsg != NULL); 264378064Sume if (errmsg) { 264469279Sume fatal("%s (with %d retries, msize=%lu)", errmsg, retry, 264569279Sume (u_long)msize); 264678064Sume /*NOTREACHED*/ 264778064Sume } else if (1 < retry) 264855163Sshin syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry); 264955163Sshin 265055163Sshin lim = buf + msize; 265155163Sshin for (p = buf; p < lim; p += rtm->rtm_msglen) { 265255163Sshin rtm = (struct rt_msghdr *)p; 265355163Sshin rt_entry(rtm, again); 265455163Sshin } 265555163Sshin free(buf); 265655163Sshin} 265755163Sshin 265855163Sshinvoid 2659243232Shrsrt_entry(struct rt_msghdr *rtm, int again) 266055163Sshin{ 266155163Sshin struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask; 266255163Sshin struct sockaddr_in6 *sin6_genmask, *sin6_ifp; 266355163Sshin char *rtmp, *ifname = NULL; 266478064Sume struct riprt *rrt, *orrt; 266555163Sshin struct netinfo6 *np; 2666243232Shrs int ifindex; 266755163Sshin 266855163Sshin sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = 0; 266955163Sshin if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags & 2670186119Sqingli (RTF_XRESOLVE|RTF_BLACKHOLE)) { 267155163Sshin return; /* not interested in the link route */ 267262607Sitojun } 267369279Sume /* do not look at cloned routes */ 267469279Sume#ifdef RTF_WASCLONED 267569279Sume if (rtm->rtm_flags & RTF_WASCLONED) 267669279Sume return; 267769279Sume#endif 267869279Sume#ifdef RTF_CLONED 267969279Sume if (rtm->rtm_flags & RTF_CLONED) 268069279Sume return; 268169279Sume#endif 2682243233Shrs /* XXX: Ignore connected routes. */ 2683243233Shrs if (!(rtm->rtm_flags & (RTF_GATEWAY|RTF_HOST|RTF_STATIC))) 2684243233Shrs return; 268569279Sume /* 268669279Sume * do not look at dynamic routes. 268769279Sume * netbsd/openbsd cloned routes have UGHD. 268869279Sume */ 268969279Sume if (rtm->rtm_flags & RTF_DYNAMIC) 269069279Sume return; 269155163Sshin rtmp = (char *)(rtm + 1); 269255163Sshin /* Destination */ 269355163Sshin if ((rtm->rtm_addrs & RTA_DST) == 0) 269455163Sshin return; /* ignore routes without destination address */ 269555163Sshin sin6_dst = (struct sockaddr_in6 *)rtmp; 269664631Sitojun rtmp += ROUNDUP(sin6_dst->sin6_len); 269755163Sshin if (rtm->rtm_addrs & RTA_GATEWAY) { 269855163Sshin sin6_gw = (struct sockaddr_in6 *)rtmp; 269955163Sshin rtmp += ROUNDUP(sin6_gw->sin6_len); 270055163Sshin } 270155163Sshin if (rtm->rtm_addrs & RTA_NETMASK) { 270255163Sshin sin6_mask = (struct sockaddr_in6 *)rtmp; 270355163Sshin rtmp += ROUNDUP(sin6_mask->sin6_len); 270455163Sshin } 270555163Sshin if (rtm->rtm_addrs & RTA_GENMASK) { 270655163Sshin sin6_genmask = (struct sockaddr_in6 *)rtmp; 270755163Sshin rtmp += ROUNDUP(sin6_genmask->sin6_len); 270855163Sshin } 270955163Sshin if (rtm->rtm_addrs & RTA_IFP) { 271055163Sshin sin6_ifp = (struct sockaddr_in6 *)rtmp; 271155163Sshin rtmp += ROUNDUP(sin6_ifp->sin6_len); 271255163Sshin } 271355163Sshin 271455163Sshin /* Destination */ 271555163Sshin if (sin6_dst->sin6_family != AF_INET6) 271655163Sshin return; 271755163Sshin if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr)) 271855163Sshin return; /* Link-local */ 271955163Sshin if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback)) 272055163Sshin return; /* Loopback */ 272155163Sshin if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr)) 272255163Sshin return; 272355163Sshin 272478064Sume if ((rrt = MALLOC(struct riprt)) == NULL) { 272555163Sshin fatal("malloc: struct riprt"); 272678064Sume /*NOTREACHED*/ 272778064Sume } 272862607Sitojun memset(rrt, 0, sizeof(*rrt)); 272955163Sshin np = &rrt->rrt_info; 273055163Sshin rrt->rrt_same = NULL; 273155163Sshin rrt->rrt_t = time(NULL); 273255163Sshin if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC)) 273355163Sshin rrt->rrt_t = 0; /* Don't age static routes */ 2734243233Shrs if (rtm->rtm_flags & Pflag) 2735243233Shrs rrt->rrt_t = 0; /* Don't age PROTO[123] routes */ 2736122677Sume if ((rtm->rtm_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST) 2737122677Sume rrt->rrt_t = 0; /* Don't age non-gateway host routes */ 273855163Sshin np->rip6_tag = 0; 273955163Sshin np->rip6_metric = rtm->rtm_rmx.rmx_hopcount; 274055163Sshin if (np->rip6_metric < 1) 274155163Sshin np->rip6_metric = 1; 274255163Sshin rrt->rrt_flags = rtm->rtm_flags; 274355163Sshin np->rip6_dest = sin6_dst->sin6_addr; 274455163Sshin 274555163Sshin /* Mask or plen */ 274655163Sshin if (rtm->rtm_flags & RTF_HOST) 274755163Sshin np->rip6_plen = 128; /* Host route */ 274878064Sume else if (sin6_mask) 274978064Sume np->rip6_plen = sin6mask2len(sin6_mask); 275078064Sume else 275155163Sshin np->rip6_plen = 0; 275255163Sshin 2753243232Shrs orrt = rtsearch(np); 275478064Sume if (orrt && orrt->rrt_info.rip6_metric != HOPCNT_INFINITY6) { 275555163Sshin /* Already found */ 275655163Sshin if (!again) { 275755163Sshin trace(1, "route: %s/%d flags %s: already registered\n", 275855163Sshin inet6_n2p(&np->rip6_dest), np->rip6_plen, 275955163Sshin rtflags(rtm)); 276055163Sshin } 276155163Sshin free(rrt); 276255163Sshin return; 276355163Sshin } 276455163Sshin /* Gateway */ 276555163Sshin if (!sin6_gw) 276655163Sshin memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 276755163Sshin else { 276855163Sshin if (sin6_gw->sin6_family == AF_INET6) 276955163Sshin rrt->rrt_gw = sin6_gw->sin6_addr; 277055163Sshin else if (sin6_gw->sin6_family == AF_LINK) { 277155163Sshin /* XXX in case ppp link? */ 277255163Sshin rrt->rrt_gw = in6addr_loopback; 277355163Sshin } else 277455163Sshin memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 277555163Sshin } 277655163Sshin trace(1, "route: %s/%d flags %s", 277755163Sshin inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm)); 277855163Sshin trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw)); 277955163Sshin 278055163Sshin /* Interface */ 2781243232Shrs ifindex = rtm->rtm_index; 2782243232Shrs if ((unsigned int)ifindex < nindex2ifc && index2ifc[ifindex]) 2783243232Shrs ifname = index2ifc[ifindex]->ifc_name; 278458070Sshin else { 278558070Sshin trace(1, " not configured\n"); 278662607Sitojun free(rrt); 278758070Sshin return; 278858070Sshin } 2789243232Shrs trace(1, " if %s sock %d", ifname, ifindex); 2790243232Shrs rrt->rrt_index = ifindex; 279155163Sshin 279262607Sitojun trace(1, "\n"); 279362607Sitojun 279455163Sshin /* Check gateway */ 279555163Sshin if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) && 2796122677Sume !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw) && 2797122677Sume (rrt->rrt_flags & RTF_LOCAL) == 0) { 279855163Sshin trace(0, "***** Gateway %s is not a link-local address.\n", 279955163Sshin inet6_n2p(&rrt->rrt_gw)); 280055163Sshin trace(0, "***** dest(%s) if(%s) -- Not optimized.\n", 280162607Sitojun inet6_n2p(&rrt->rrt_info.rip6_dest), ifname); 280262607Sitojun rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR; 280355163Sshin } 280455163Sshin 280555163Sshin /* Put it to the route list */ 280678064Sume if (orrt && orrt->rrt_info.rip6_metric == HOPCNT_INFINITY6) { 280778064Sume /* replace route list */ 2808243232Shrs TAILQ_INSERT_BEFORE(orrt, rrt, rrt_next); 2809243232Shrs TAILQ_REMOVE(&riprt_head, orrt, rrt_next); 2810243232Shrs 281178064Sume trace(1, "route: %s/%d flags %s: replace new route\n", 281278064Sume inet6_n2p(&np->rip6_dest), np->rip6_plen, 281378064Sume rtflags(rtm)); 2814243232Shrs free(orrt); 2815243232Shrs } else 2816243232Shrs TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next); 281755163Sshin} 281855163Sshin 281955163Sshinint 2820243232Shrsaddroute(struct riprt *rrt, 2821243232Shrs const struct in6_addr *gw, 2822243232Shrs struct ifc *ifcp) 282355163Sshin{ 282455163Sshin struct netinfo6 *np; 282555163Sshin u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ]; 282655163Sshin struct rt_msghdr *rtm; 2827119031Sume struct sockaddr_in6 *sin6; 282855163Sshin int len; 282955163Sshin 283055163Sshin np = &rrt->rrt_info; 283178064Sume inet_ntop(AF_INET6, (const void *)gw, (char *)buf1, sizeof(buf1)); 283255163Sshin inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2)); 283355163Sshin tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n", 283455163Sshin inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 283555163Sshin np->rip6_metric - 1, buf2); 283655163Sshin if (rtlog) 283755163Sshin fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(), 283855163Sshin inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 283955163Sshin np->rip6_metric - 1, buf2); 284055163Sshin if (nflag) 284155163Sshin return 0; 284255163Sshin 284355163Sshin memset(buf, 0, sizeof(buf)); 284455163Sshin rtm = (struct rt_msghdr *)buf; 284555163Sshin rtm->rtm_type = RTM_ADD; 284655163Sshin rtm->rtm_version = RTM_VERSION; 284755163Sshin rtm->rtm_seq = ++seq; 284855163Sshin rtm->rtm_pid = pid; 284962607Sitojun rtm->rtm_flags = rrt->rrt_flags; 2850243233Shrs rtm->rtm_flags |= Qflag; 285155163Sshin rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 285255163Sshin rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1; 285355163Sshin rtm->rtm_inits = RTV_HOPCOUNT; 2854119031Sume sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 285555163Sshin /* Destination */ 2856119031Sume sin6->sin6_len = sizeof(struct sockaddr_in6); 2857119031Sume sin6->sin6_family = AF_INET6; 2858119031Sume sin6->sin6_addr = np->rip6_dest; 2859119031Sume sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 286055163Sshin /* Gateway */ 2861119031Sume sin6->sin6_len = sizeof(struct sockaddr_in6); 2862119031Sume sin6->sin6_family = AF_INET6; 2863119031Sume sin6->sin6_addr = *gw; 2864119031Sume sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 286555163Sshin /* Netmask */ 2866119031Sume sin6->sin6_len = sizeof(struct sockaddr_in6); 2867119031Sume sin6->sin6_family = AF_INET6; 2868119031Sume sin6->sin6_addr = *(plen2mask(np->rip6_plen)); 2869119031Sume sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 287055163Sshin 2871119031Sume len = (char *)sin6 - (char *)buf; 287255163Sshin rtm->rtm_msglen = len; 287355163Sshin if (write(rtsock, buf, len) > 0) 287455163Sshin return 0; 287555163Sshin 287655163Sshin if (errno == EEXIST) { 287755163Sshin trace(0, "ADD: Route already exists %s/%d gw %s\n", 2878119035Sume inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 287955163Sshin if (rtlog) 288055163Sshin fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n", 2881119035Sume inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 288255163Sshin } else { 288355163Sshin trace(0, "Can not write to rtsock (addroute): %s\n", 2884119035Sume strerror(errno)); 288555163Sshin if (rtlog) 288655163Sshin fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2887119035Sume strerror(errno)); 288855163Sshin } 288955163Sshin return -1; 289055163Sshin} 289155163Sshin 289255163Sshinint 2893243232Shrsdelroute(struct netinfo6 *np, struct in6_addr *gw) 289455163Sshin{ 289555163Sshin u_char buf[BUFSIZ], buf2[BUFSIZ]; 289655163Sshin struct rt_msghdr *rtm; 2897119031Sume struct sockaddr_in6 *sin6; 289855163Sshin int len; 289955163Sshin 290055163Sshin inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2)); 290155163Sshin tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest), 290255163Sshin np->rip6_plen, buf2); 290355163Sshin if (rtlog) 290455163Sshin fprintf(rtlog, "%s: DEL: %s/%d gw %s\n", 290555163Sshin hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 290655163Sshin if (nflag) 290755163Sshin return 0; 290855163Sshin 290955163Sshin memset(buf, 0, sizeof(buf)); 291055163Sshin rtm = (struct rt_msghdr *)buf; 291155163Sshin rtm->rtm_type = RTM_DELETE; 291255163Sshin rtm->rtm_version = RTM_VERSION; 291355163Sshin rtm->rtm_seq = ++seq; 291455163Sshin rtm->rtm_pid = pid; 291555163Sshin rtm->rtm_flags = RTF_UP | RTF_GATEWAY; 2916243233Shrs rtm->rtm_flags |= Qflag; 291778064Sume if (np->rip6_plen == sizeof(struct in6_addr) * 8) 291878064Sume rtm->rtm_flags |= RTF_HOST; 291955163Sshin rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 2920119031Sume sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 292155163Sshin /* Destination */ 2922119031Sume sin6->sin6_len = sizeof(struct sockaddr_in6); 2923119031Sume sin6->sin6_family = AF_INET6; 2924119031Sume sin6->sin6_addr = np->rip6_dest; 2925119031Sume sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 292655163Sshin /* Gateway */ 2927119031Sume sin6->sin6_len = sizeof(struct sockaddr_in6); 2928119031Sume sin6->sin6_family = AF_INET6; 2929119031Sume sin6->sin6_addr = *gw; 2930119031Sume sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 293155163Sshin /* Netmask */ 2932119031Sume sin6->sin6_len = sizeof(struct sockaddr_in6); 2933119031Sume sin6->sin6_family = AF_INET6; 2934119031Sume sin6->sin6_addr = *(plen2mask(np->rip6_plen)); 2935119031Sume sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 293655163Sshin 2937119031Sume len = (char *)sin6 - (char *)buf; 293855163Sshin rtm->rtm_msglen = len; 293955163Sshin if (write(rtsock, buf, len) >= 0) 294055163Sshin return 0; 294155163Sshin 294255163Sshin if (errno == ESRCH) { 294355163Sshin trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n", 2944119035Sume inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 294555163Sshin if (rtlog) 294655163Sshin fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n", 2947119035Sume inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 294855163Sshin } else { 294955163Sshin trace(0, "Can not write to rtsock (delroute): %s\n", 2950119035Sume strerror(errno)); 295155163Sshin if (rtlog) 295255163Sshin fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2953119035Sume strerror(errno)); 295455163Sshin } 295555163Sshin return -1; 295655163Sshin} 295755163Sshin 295855163Sshinstruct in6_addr * 2959243232Shrsgetroute(struct netinfo6 *np, struct in6_addr *gw) 296055163Sshin{ 296155163Sshin u_char buf[BUFSIZ]; 2962119085Sume int myseq; 296355163Sshin int len; 296455163Sshin struct rt_msghdr *rtm; 2965119031Sume struct sockaddr_in6 *sin6; 296655163Sshin 296755163Sshin rtm = (struct rt_msghdr *)buf; 296855163Sshin len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6); 296955163Sshin memset(rtm, 0, len); 297055163Sshin rtm->rtm_type = RTM_GET; 297155163Sshin rtm->rtm_version = RTM_VERSION; 297255163Sshin myseq = ++seq; 297355163Sshin rtm->rtm_seq = myseq; 297455163Sshin rtm->rtm_addrs = RTA_DST; 297555163Sshin rtm->rtm_msglen = len; 2976119031Sume sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2977119031Sume sin6->sin6_len = sizeof(struct sockaddr_in6); 2978119031Sume sin6->sin6_family = AF_INET6; 2979119031Sume sin6->sin6_addr = np->rip6_dest; 298055163Sshin if (write(rtsock, buf, len) < 0) { 298155163Sshin if (errno == ESRCH) /* No such route found */ 298255163Sshin return NULL; 298355163Sshin perror("write to rtsock"); 298478064Sume exit(1); 298555163Sshin } 298655163Sshin do { 298755163Sshin if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 298855163Sshin perror("read from rtsock"); 298978064Sume exit(1); 299055163Sshin } 299155163Sshin rtm = (struct rt_msghdr *)buf; 299255163Sshin } while (rtm->rtm_seq != myseq || rtm->rtm_pid != pid); 2993119031Sume sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 299455163Sshin if (rtm->rtm_addrs & RTA_DST) { 2995119031Sume sin6 = (struct sockaddr_in6 *) 2996119031Sume ((char *)sin6 + ROUNDUP(sin6->sin6_len)); 299755163Sshin } 299855163Sshin if (rtm->rtm_addrs & RTA_GATEWAY) { 2999119031Sume *gw = sin6->sin6_addr; 300055163Sshin return gw; 300155163Sshin } 300255163Sshin return NULL; 300355163Sshin} 300455163Sshin 300555163Sshinconst char * 3006243232Shrsinet6_n2p(const struct in6_addr *p) 300755163Sshin{ 300855163Sshin static char buf[BUFSIZ]; 300955163Sshin 301078064Sume return inet_ntop(AF_INET6, (const void *)p, buf, sizeof(buf)); 301155163Sshin} 301255163Sshin 301355163Sshinvoid 3014243232Shrsifrtdump(int sig) 301555163Sshin{ 301655163Sshin 301755163Sshin ifdump(sig); 301855163Sshin rtdump(sig); 301955163Sshin} 302055163Sshin 302155163Sshinvoid 3022243232Shrsifdump(int sig) 302355163Sshin{ 302455163Sshin struct ifc *ifcp; 302555163Sshin FILE *dump; 3026243232Shrs int nifc = 0; 302755163Sshin 302855163Sshin if (sig == 0) 302955163Sshin dump = stderr; 303055163Sshin else 303155163Sshin if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 303255163Sshin dump = stderr; 303355163Sshin 303455163Sshin fprintf(dump, "%s: Interface Table Dump\n", hms()); 3035243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) 3036243232Shrs nifc++; 303755163Sshin fprintf(dump, " Number of interfaces: %d\n", nifc); 3038243232Shrs 3039243232Shrs fprintf(dump, " advertising interfaces:\n"); 3040243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 3041243232Shrs if ((ifcp->ifc_flags & IFF_UP) == 0) 3042243232Shrs continue; 3043243232Shrs if (iff_find(ifcp, IFIL_TYPE_N) != NULL) 3044243232Shrs continue; 3045243232Shrs ifdump0(dump, ifcp); 304655163Sshin } 304755163Sshin fprintf(dump, "\n"); 3048243232Shrs fprintf(dump, " non-advertising interfaces:\n"); 3049243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 3050243232Shrs if ((ifcp->ifc_flags & IFF_UP) && 3051243232Shrs (iff_find(ifcp, IFIL_TYPE_N) == NULL)) 3052243232Shrs continue; 3053243232Shrs ifdump0(dump, ifcp); 3054243232Shrs } 3055243232Shrs fprintf(dump, "\n"); 305655163Sshin if (dump != stderr) 305755163Sshin fclose(dump); 305855163Sshin} 305955163Sshin 306055163Sshinvoid 3061243232Shrsifdump0(FILE *dump, const struct ifc *ifcp) 306255163Sshin{ 3063243232Shrs struct ifac *ifac; 306455163Sshin struct iff *iffp; 306555163Sshin char buf[BUFSIZ]; 306655163Sshin const char *ft; 306755163Sshin int addr; 306855163Sshin 306955163Sshin fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n", 307055163Sshin ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags), 307155163Sshin inet6_n2p(&ifcp->ifc_mylladdr), 307255163Sshin ifcp->ifc_mtu, ifcp->ifc_metric); 3073243232Shrs TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) { 307455163Sshin if (ifcp->ifc_flags & IFF_POINTOPOINT) { 3075243232Shrs inet_ntop(AF_INET6, (void *)&ifac->ifac_raddr, 307655163Sshin buf, sizeof(buf)); 307755163Sshin fprintf(dump, "\t%s/%d -- %s\n", 3078243232Shrs inet6_n2p(&ifac->ifac_addr), 3079243232Shrs ifac->ifac_plen, buf); 308055163Sshin } else { 308155163Sshin fprintf(dump, "\t%s/%d\n", 3082243232Shrs inet6_n2p(&ifac->ifac_addr), 3083243232Shrs ifac->ifac_plen); 308455163Sshin } 308555163Sshin } 3086243232Shrs 3087243232Shrs fprintf(dump, "\tFilter:\n"); 3088243232Shrs TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) { 3089243232Shrs addr = 0; 3090243232Shrs switch (iffp->iff_type) { 3091243232Shrs case IFIL_TYPE_A: 3092243232Shrs ft = "Aggregate"; addr++; break; 3093243232Shrs case IFIL_TYPE_N: 3094243232Shrs ft = "No-use"; break; 3095243232Shrs case IFIL_TYPE_O: 3096243232Shrs ft = "Advertise-only"; addr++; break; 3097243232Shrs case IFIL_TYPE_T: 3098243232Shrs ft = "Default-only"; break; 3099243232Shrs case IFIL_TYPE_L: 3100243232Shrs ft = "Listen-only"; addr++; break; 3101243232Shrs default: 3102243232Shrs snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type); 3103243232Shrs ft = buf; 3104243232Shrs addr++; 3105243232Shrs break; 310655163Sshin } 3107243232Shrs fprintf(dump, "\t\t%s", ft); 3108243232Shrs if (addr) 3109243232Shrs fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr), 3110243232Shrs iffp->iff_plen); 311155163Sshin fprintf(dump, "\n"); 311255163Sshin } 3113243232Shrs fprintf(dump, "\n"); 311455163Sshin} 311555163Sshin 311655163Sshinvoid 3117243232Shrsrtdump(int sig) 311855163Sshin{ 311955163Sshin struct riprt *rrt; 312055163Sshin char buf[BUFSIZ]; 312155163Sshin FILE *dump; 312255163Sshin time_t t, age; 312355163Sshin 312455163Sshin if (sig == 0) 312555163Sshin dump = stderr; 312655163Sshin else 312755163Sshin if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 312855163Sshin dump = stderr; 312955163Sshin 313055163Sshin t = time(NULL); 313155163Sshin fprintf(dump, "\n%s: Routing Table Dump\n", hms()); 3132243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 313355163Sshin if (rrt->rrt_t == 0) 313455163Sshin age = 0; 313555163Sshin else 313655163Sshin age = t - rrt->rrt_t; 313755163Sshin inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest, 313855163Sshin buf, sizeof(buf)); 313955163Sshin fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)", 314055163Sshin buf, rrt->rrt_info.rip6_plen, rrt->rrt_index, 314155163Sshin index2ifc[rrt->rrt_index]->ifc_name, 314255163Sshin inet6_n2p(&rrt->rrt_gw), 314355163Sshin rrt->rrt_info.rip6_metric, (long)age); 314455163Sshin if (rrt->rrt_info.rip6_tag) { 314555163Sshin fprintf(dump, " tag(0x%04x)", 314655163Sshin ntohs(rrt->rrt_info.rip6_tag) & 0xffff); 314755163Sshin } 314862607Sitojun if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) 314955163Sshin fprintf(dump, " NOT-LL"); 315062607Sitojun if (rrt->rrt_rflags & RRTF_NOADVERTISE) 315155163Sshin fprintf(dump, " NO-ADV"); 315255163Sshin fprintf(dump, "\n"); 315355163Sshin } 315455163Sshin fprintf(dump, "\n"); 315555163Sshin if (dump != stderr) 315655163Sshin fclose(dump); 315755163Sshin} 315855163Sshin 315955163Sshin/* 316055163Sshin * Parse the -A (and -O) options and put corresponding filter object to the 316178064Sume * specified interface structures. Each of the -A/O option has the following 316255163Sshin * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate) 316355163Sshin * -O 5f09:c400::/32,ef0,ef1 (only when match) 316455163Sshin */ 316555163Sshinvoid 3166243232Shrsfilterconfig(void) 316755163Sshin{ 316855163Sshin int i; 3169119083Sume char *p, *ap, *iflp, *ifname, *ep; 3170243232Shrs struct iff iff, *iffp; 317178064Sume struct ifc *ifcp; 317278064Sume struct riprt *rrt; 317364631Sitojun#if 0 317478064Sume struct in6_addr gw; 317564631Sitojun#endif 3176119083Sume u_long plen; 317755163Sshin 317855163Sshin for (i = 0; i < nfilter; i++) { 317955163Sshin ap = filter[i]; 318055163Sshin iflp = NULL; 3181243232Shrs iffp = ⇔ 3182243232Shrs memset(iffp, 0, sizeof(*iffp)); 318355163Sshin if (filtertype[i] == 'N' || filtertype[i] == 'T') { 318455163Sshin iflp = ap; 318555163Sshin goto ifonly; 318655163Sshin } 3187119038Sume if ((p = strchr(ap, ',')) != NULL) { 318855163Sshin *p++ = '\0'; 318955163Sshin iflp = p; 319055163Sshin } 3191119038Sume if ((p = strchr(ap, '/')) == NULL) { 319255163Sshin fatal("no prefixlen specified for '%s'", ap); 319378064Sume /*NOTREACHED*/ 319478064Sume } 319555163Sshin *p++ = '\0'; 3196243232Shrs if (inet_pton(AF_INET6, ap, &iffp->iff_addr) != 1) { 319755163Sshin fatal("invalid prefix specified for '%s'", ap); 319878064Sume /*NOTREACHED*/ 319978064Sume } 3200119083Sume errno = 0; 3201119083Sume ep = NULL; 3202119083Sume plen = strtoul(p, &ep, 10); 3203243232Shrs if (errno || !*p || *ep || plen > sizeof(iffp->iff_addr) * 8) { 3204119083Sume fatal("invalid prefix length specified for '%s'", ap); 3205119083Sume /*NOTREACHED*/ 3206119083Sume } 3207243232Shrs iffp->iff_plen = plen; 3208243232Shrs applyplen(&iffp->iff_addr, iffp->iff_plen); 320955163Sshinifonly: 3210243232Shrs iffp->iff_type = filtertype[i]; 321178064Sume if (iflp == NULL || *iflp == '\0') { 321255163Sshin fatal("no interface specified for '%s'", ap); 321378064Sume /*NOTREACHED*/ 321478064Sume } 321555163Sshin /* parse the interface listing portion */ 321655163Sshin while (iflp) { 321755163Sshin ifname = iflp; 3218119038Sume if ((iflp = strchr(iflp, ',')) != NULL) 321955163Sshin *iflp++ = '\0'; 3220243232Shrs 3221243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 3222243233Shrs if (fnmatch(ifname, ifcp->ifc_name, 0) != 0) 3223243232Shrs continue; 3224243232Shrs 3225243232Shrs iffp = malloc(sizeof(*iffp)); 3226243232Shrs if (iffp == NULL) { 3227243232Shrs fatal("malloc of iff"); 3228243232Shrs /*NOTREACHED*/ 3229243232Shrs } 3230243232Shrs memcpy(iffp, &iff, sizeof(*iffp)); 3231243233Shrs#if 0 3232243233Shrs syslog(LOG_INFO, "Add filter: type %d, ifname %s.", iffp->iff_type, ifname); 3233243233Shrs#endif 3234243232Shrs TAILQ_INSERT_HEAD(&ifcp->ifc_iff_head, iffp, iff_next); 323578064Sume } 323655163Sshin } 323778064Sume 323878064Sume /* 323978064Sume * -A: aggregate configuration. 324078064Sume */ 3241243232Shrs if (filtertype[i] != IFIL_TYPE_A) 324255163Sshin continue; 324355163Sshin /* put the aggregate to the kernel routing table */ 324455163Sshin rrt = (struct riprt *)malloc(sizeof(struct riprt)); 324578064Sume if (rrt == NULL) { 324655163Sshin fatal("malloc: rrt"); 324778064Sume /*NOTREACHED*/ 324878064Sume } 324955163Sshin memset(rrt, 0, sizeof(struct riprt)); 3250243232Shrs rrt->rrt_info.rip6_dest = iff.iff_addr; 3251243232Shrs rrt->rrt_info.rip6_plen = iff.iff_plen; 325255163Sshin rrt->rrt_info.rip6_metric = 1; 325355163Sshin rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 325455163Sshin rrt->rrt_gw = in6addr_loopback; 325562607Sitojun rrt->rrt_flags = RTF_UP | RTF_REJECT; 325662607Sitojun rrt->rrt_rflags = RRTF_AGGREGATE; 325755163Sshin rrt->rrt_t = 0; 3258119039Sume rrt->rrt_index = loopifcp->ifc_index; 325964631Sitojun#if 0 326064631Sitojun if (getroute(&rrt->rrt_info, &gw)) { 326164631Sitojun#if 0 326264631Sitojun /* 326364631Sitojun * When the address has already been registered in the 326464631Sitojun * kernel routing table, it should be removed 326564631Sitojun */ 326664631Sitojun delroute(&rrt->rrt_info, &gw); 326764631Sitojun#else 326878064Sume /* it is safer behavior */ 326964631Sitojun errno = EINVAL; 327064631Sitojun fatal("%s/%u already in routing table, " 327164631Sitojun "cannot aggregate", 327264631Sitojun inet6_n2p(&rrt->rrt_info.rip6_dest), 327364631Sitojun rrt->rrt_info.rip6_plen); 327478064Sume /*NOTREACHED*/ 327564631Sitojun#endif 327664631Sitojun } 327764631Sitojun#endif 327855163Sshin /* Put the route to the list */ 3279243232Shrs TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next); 328055163Sshin trace(1, "Aggregate: %s/%d for %s\n", 3281243232Shrs inet6_n2p(&iff.iff_addr), iff.iff_plen, 3282243232Shrs loopifcp->ifc_name); 328355163Sshin /* Add this route to the kernel */ 328455163Sshin if (nflag) /* do not modify kernel routing table */ 328555163Sshin continue; 328655163Sshin addroute(rrt, &in6addr_loopback, loopifcp); 328755163Sshin } 328855163Sshin} 328955163Sshin 329055163Sshin/***************** utility functions *****************/ 329155163Sshin 329255163Sshin/* 329355163Sshin * Returns a pointer to ifac whose address and prefix length matches 329455163Sshin * with the address and prefix length specified in the arguments. 329555163Sshin */ 329655163Sshinstruct ifac * 3297243232Shrsifa_match(const struct ifc *ifcp, 3298243232Shrs const struct in6_addr *ia, 3299243232Shrs int plen) 330055163Sshin{ 3301243232Shrs struct ifac *ifac; 330255163Sshin 3303243232Shrs TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) { 3304243232Shrs if (IN6_ARE_ADDR_EQUAL(&ifac->ifac_addr, ia) && 3305243232Shrs ifac->ifac_plen == plen) 330655163Sshin break; 330755163Sshin } 3308243232Shrs 3309243232Shrs return (ifac); 331055163Sshin} 331155163Sshin 331255163Sshin/* 331355163Sshin * Return a pointer to riprt structure whose address and prefix length 331455163Sshin * matches with the address and prefix length found in the argument. 331578064Sume * Note: This is not a rtalloc(). Therefore exact match is necessary. 331655163Sshin */ 331755163Sshinstruct riprt * 3318243232Shrsrtsearch(struct netinfo6 *np) 331955163Sshin{ 332055163Sshin struct riprt *rrt; 332155163Sshin 3322243232Shrs TAILQ_FOREACH(rrt, &riprt_head, rrt_next) { 332355163Sshin if (rrt->rrt_info.rip6_plen == np->rip6_plen && 332455163Sshin IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 332555163Sshin &np->rip6_dest)) 3326243232Shrs break; 332755163Sshin } 3328243232Shrs 3329243232Shrs return (rrt); 333055163Sshin} 333155163Sshin 333255163Sshinint 3333243232Shrssin6mask2len(const struct sockaddr_in6 *sin6) 333478064Sume{ 333578064Sume 333678064Sume return mask2len(&sin6->sin6_addr, 333778064Sume sin6->sin6_len - offsetof(struct sockaddr_in6, sin6_addr)); 333878064Sume} 333978064Sume 334078064Sumeint 3341243232Shrsmask2len(const struct in6_addr *addr, int lenlim) 334255163Sshin{ 334355163Sshin int i = 0, j; 334478064Sume const u_char *p = (const u_char *)addr; 334562607Sitojun 334655163Sshin for (j = 0; j < lenlim; j++, p++) { 334755163Sshin if (*p != 0xff) 334855163Sshin break; 334955163Sshin i += 8; 335055163Sshin } 335155163Sshin if (j < lenlim) { 335255163Sshin switch (*p) { 335362607Sitojun#define MASKLEN(m, l) case m: do { i += l; break; } while (0) 335462607Sitojun MASKLEN(0xfe, 7); break; 335562607Sitojun MASKLEN(0xfc, 6); break; 335662607Sitojun MASKLEN(0xf8, 5); break; 335762607Sitojun MASKLEN(0xf0, 4); break; 335862607Sitojun MASKLEN(0xe0, 3); break; 335962607Sitojun MASKLEN(0xc0, 2); break; 336062607Sitojun MASKLEN(0x80, 1); break; 336155163Sshin#undef MASKLEN 336255163Sshin } 336355163Sshin } 336455163Sshin return i; 336555163Sshin} 336655163Sshin 336755163Sshinvoid 3368243232Shrsapplymask(struct in6_addr *addr, struct in6_addr *mask) 336955163Sshin{ 337055163Sshin int i; 337155163Sshin u_long *p, *q; 337255163Sshin 337355163Sshin p = (u_long *)addr; q = (u_long *)mask; 337455163Sshin for (i = 0; i < 4; i++) 337555163Sshin *p++ &= *q++; 337655163Sshin} 337755163Sshin 337855163Sshinstatic const u_char plent[8] = { 337955163Sshin 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe 338055163Sshin}; 338155163Sshin 338255163Sshinvoid 3383243232Shrsapplyplen(struct in6_addr *ia, int plen) 338455163Sshin{ 338555163Sshin u_char *p; 338655163Sshin int i; 338755163Sshin 338855163Sshin p = ia->s6_addr; 338955163Sshin for (i = 0; i < 16; i++) { 339055163Sshin if (plen <= 0) 339155163Sshin *p = 0; 339255163Sshin else if (plen < 8) 339355163Sshin *p &= plent[plen]; 339455163Sshin p++, plen -= 8; 339555163Sshin } 339655163Sshin} 339755163Sshin 339855163Sshinstatic const int pl2m[9] = { 339955163Sshin 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff 340055163Sshin}; 340155163Sshin 340255163Sshinstruct in6_addr * 3403243232Shrsplen2mask(int n) 340455163Sshin{ 340555163Sshin static struct in6_addr ia; 340655163Sshin u_char *p; 340755163Sshin int i; 340855163Sshin 340955163Sshin memset(&ia, 0, sizeof(struct in6_addr)); 341055163Sshin p = (u_char *)&ia; 341155163Sshin for (i = 0; i < 16; i++, p++, n -= 8) { 341255163Sshin if (n >= 8) { 341355163Sshin *p = 0xff; 341455163Sshin continue; 341555163Sshin } 341655163Sshin *p = pl2m[n]; 341755163Sshin break; 341855163Sshin } 341955163Sshin return &ia; 342055163Sshin} 342155163Sshin 342255163Sshinchar * 3423243232Shrsallocopy(char *p) 342455163Sshin{ 3425119033Sume int len = strlen(p) + 1; 3426119033Sume char *q = (char *)malloc(len); 342755163Sshin 3428119033Sume if (!q) { 3429119033Sume fatal("malloc"); 3430119033Sume /*NOTREACHED*/ 3431119033Sume } 3432119033Sume 3433119033Sume strlcpy(q, p, len); 343455163Sshin return q; 343555163Sshin} 343655163Sshin 343755163Sshinchar * 3438243232Shrshms(void) 343955163Sshin{ 344055163Sshin static char buf[BUFSIZ]; 344155163Sshin time_t t; 344255163Sshin struct tm *tm; 344355163Sshin 344455163Sshin t = time(NULL); 344578064Sume if ((tm = localtime(&t)) == 0) { 344655163Sshin fatal("localtime"); 344778064Sume /*NOTREACHED*/ 344878064Sume } 344978064Sume snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, 345078064Sume tm->tm_sec); 345155163Sshin return buf; 345255163Sshin} 345355163Sshin 345455163Sshin#define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */ 345555163Sshin 345655163Sshinint 3457243232Shrsripinterval(int timer) 345855163Sshin{ 345955163Sshin double r = rand(); 346055163Sshin 346155163Sshin interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5)); 346255163Sshin nextalarm = time(NULL) + interval; 346355163Sshin return interval; 346455163Sshin} 346555163Sshin 346655163Sshintime_t 3467243232Shrsripsuptrig(void) 346855163Sshin{ 346955163Sshin time_t t; 347055163Sshin 347155163Sshin double r = rand(); 347262607Sitojun t = (int)(RIP_TRIG_INT6_MIN + 347378064Sume (RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX)); 347455163Sshin sup_trig_update = time(NULL) + t; 347555163Sshin return t; 347655163Sshin} 347755163Sshin 347855163Sshinvoid 347955163Sshin#ifdef __STDC__ 348055163Sshinfatal(const char *fmt, ...) 348155163Sshin#else 348255163Sshinfatal(fmt, va_alist) 348355163Sshin char *fmt; 348455163Sshin va_dcl 348555163Sshin#endif 348655163Sshin{ 348755163Sshin va_list ap; 348855163Sshin char buf[1024]; 348955163Sshin 349055163Sshin#ifdef __STDC__ 349155163Sshin va_start(ap, fmt); 349255163Sshin#else 349355163Sshin va_start(ap); 349455163Sshin#endif 349555163Sshin vsnprintf(buf, sizeof(buf), fmt, ap); 3496119043Sume va_end(ap); 349755163Sshin perror(buf); 3498119043Sume if (errno) 3499119043Sume syslog(LOG_ERR, "%s: %s", buf, strerror(errno)); 3500119043Sume else 3501119043Sume syslog(LOG_ERR, "%s", buf); 350278064Sume rtdexit(); 350355163Sshin} 350455163Sshin 350555163Sshinvoid 350655163Sshin#ifdef __STDC__ 350755163Sshintracet(int level, const char *fmt, ...) 350855163Sshin#else 350955163Sshintracet(level, fmt, va_alist) 351055163Sshin int level; 351155163Sshin char *fmt; 351255163Sshin va_dcl 351355163Sshin#endif 351455163Sshin{ 351555163Sshin va_list ap; 351655163Sshin 3517119043Sume if (level <= dflag) { 351855163Sshin#ifdef __STDC__ 3519119043Sume va_start(ap, fmt); 352055163Sshin#else 3521119043Sume va_start(ap); 352255163Sshin#endif 352355163Sshin fprintf(stderr, "%s: ", hms()); 352455163Sshin vfprintf(stderr, fmt, ap); 3525119043Sume va_end(ap); 352655163Sshin } 352755163Sshin if (dflag) { 3528119043Sume#ifdef __STDC__ 3529119043Sume va_start(ap, fmt); 3530119043Sume#else 3531119043Sume va_start(ap); 3532119043Sume#endif 353355163Sshin if (level > 0) 353455163Sshin vsyslog(LOG_DEBUG, fmt, ap); 353555163Sshin else 353655163Sshin vsyslog(LOG_WARNING, fmt, ap); 3537119043Sume va_end(ap); 353855163Sshin } 353955163Sshin} 354055163Sshin 354155163Sshinvoid 354255163Sshin#ifdef __STDC__ 354355163Sshintrace(int level, const char *fmt, ...) 354455163Sshin#else 354555163Sshintrace(level, fmt, va_alist) 354655163Sshin int level; 354755163Sshin char *fmt; 354855163Sshin va_dcl 354955163Sshin#endif 355055163Sshin{ 355155163Sshin va_list ap; 355255163Sshin 3553119043Sume if (level <= dflag) { 355455163Sshin#ifdef __STDC__ 3555119043Sume va_start(ap, fmt); 355655163Sshin#else 3557119043Sume va_start(ap); 355855163Sshin#endif 355955163Sshin vfprintf(stderr, fmt, ap); 3560119043Sume va_end(ap); 3561119043Sume } 356255163Sshin if (dflag) { 3563119043Sume#ifdef __STDC__ 3564119043Sume va_start(ap, fmt); 3565119043Sume#else 3566119043Sume va_start(ap); 3567119043Sume#endif 356855163Sshin if (level > 0) 356955163Sshin vsyslog(LOG_DEBUG, fmt, ap); 357055163Sshin else 357155163Sshin vsyslog(LOG_WARNING, fmt, ap); 3572119043Sume va_end(ap); 357355163Sshin } 357455163Sshin} 357555163Sshin 357655163Sshinunsigned int 3577243232Shrsif_maxindex(void) 357855163Sshin{ 357955163Sshin struct if_nameindex *p, *p0; 358055163Sshin unsigned int max = 0; 358155163Sshin 358255163Sshin p0 = if_nameindex(); 358355163Sshin for (p = p0; p && p->if_index && p->if_name; p++) { 358455163Sshin if (max < p->if_index) 358555163Sshin max = p->if_index; 358655163Sshin } 358755163Sshin if_freenameindex(p0); 358855163Sshin return max; 358955163Sshin} 359055163Sshin 359155163Sshinstruct ifc * 3592243232Shrsifc_find(char *name) 359355163Sshin{ 359455163Sshin struct ifc *ifcp; 359555163Sshin 3596243232Shrs TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) { 359755163Sshin if (strcmp(name, ifcp->ifc_name) == 0) 3598243232Shrs break; 359955163Sshin } 3600243232Shrs return (ifcp); 360155163Sshin} 360255163Sshin 360355163Sshinstruct iff * 3604243232Shrsiff_find(struct ifc *ifcp, int type) 360555163Sshin{ 360655163Sshin struct iff *iffp; 360755163Sshin 3608243232Shrs TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) { 3609243232Shrs if (type == IFIL_TYPE_ANY || 3610243232Shrs type == iffp->iff_type) 3611243232Shrs break; 361255163Sshin } 3613243232Shrs 3614243232Shrs return (iffp); 361555163Sshin} 361655163Sshin 361755163Sshinvoid 3618243232Shrssetindex2ifc(int idx, struct ifc *ifcp) 361955163Sshin{ 3620122677Sume int n, nsize; 362162607Sitojun struct ifc **p; 362255163Sshin 362355163Sshin if (!index2ifc) { 362455163Sshin nindex2ifc = 5; /*initial guess*/ 362555163Sshin index2ifc = (struct ifc **) 362655163Sshin malloc(sizeof(*index2ifc) * nindex2ifc); 362778064Sume if (index2ifc == NULL) { 362855163Sshin fatal("malloc"); 362978064Sume /*NOTREACHED*/ 363078064Sume } 363155163Sshin memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc); 363255163Sshin } 363355163Sshin n = nindex2ifc; 3634122677Sume for (nsize = nindex2ifc; nsize <= idx; nsize *= 2) 3635122677Sume ; 3636122677Sume if (n != nsize) { 363762607Sitojun p = (struct ifc **)realloc(index2ifc, 3638122677Sume sizeof(*index2ifc) * nsize); 363978064Sume if (p == NULL) { 364055163Sshin fatal("realloc"); 364178064Sume /*NOTREACHED*/ 364278064Sume } 364378064Sume memset(p + n, 0, sizeof(*index2ifc) * (nindex2ifc - n)); 364462607Sitojun index2ifc = p; 3645122677Sume nindex2ifc = nsize; 364655163Sshin } 364778064Sume index2ifc[idx] = ifcp; 364855163Sshin} 3649