From 8c2ccb59caf882ac518eda1f570ea731d4466216 Mon Sep 17 00:00:00 2001 From: shin Date: Tue, 28 Dec 1999 02:37:14 +0000 Subject: Getaddrinfo(), getnameinfo(), and etc support in libc/net. Several udp and raw apps IPv6 support. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project --- usr.sbin/route6d/route6d.c | 2913 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2913 insertions(+) create mode 100644 usr.sbin/route6d/route6d.c (limited to 'usr.sbin/route6d/route6d.c') diff --git a/usr.sbin/route6d/route6d.c b/usr.sbin/route6d/route6d.c new file mode 100644 index 0000000..857f5cb --- /dev/null +++ b/usr.sbin/route6d/route6d.c @@ -0,0 +1,2913 @@ +/* + * $Header: /cvsroot/kame/kame/kame/kame/route6d/route6d.c,v 1.6 1999/09/10 08:20:59 itojun Exp $ + */ + +/* + * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef lint +static char _rcsid[] = "$Id: route6d.c,v 1.6 1999/09/10 08:20:59 itojun Exp $"; +#endif + +#include + +#include +#include +#include +#include +#include +#ifdef __STDC__ +#include +#else +#include +#endif +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#ifdef ADVAPI +#include +#endif +#include +#if defined(__FreeBSD__) && __FreeBSD__ >= 3 +#include +#endif /* __FreeBSD__ >= 3 */ +#define KERNEL 1 +#include +#undef KERNEL +#include +#include +#include +#include +#include + +#include + +#include "route6d.h" + +#define MAXFILTER 40 + +#ifdef DEBUG +#define INIT_INTERVAL6 6 +#else +#define INIT_INTERVAL6 10 /* Wait to submit a initial riprequest */ +#endif + +/* alignment constraint for routing socket */ +#define ROUNDUP(a) \ + ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) +#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) + +/* + * Following two macros are highly depending on KAME Release + */ +#define IN6_LINKLOCAL_IFINDEX(addr) \ + ((addr).s6_addr[2] << 8 | (addr).s6_addr[3]) + +#define SET_IN6_LINKLOCAL_IFINDEX(addr, index) \ + do { \ + (addr).s6_addr[2] = ((index) >> 8) & 0xff; \ + (addr).s6_addr[3] = (index) & 0xff; \ + } while (0) + +struct ifc { /* Configuration of an interface */ + char *ifc_name; /* if name */ + struct ifc *ifc_next; + int ifc_index; /* if index */ + int ifc_mtu; /* if mtu */ + int ifc_metric; /* if metric */ + short ifc_flags; /* flags */ + struct in6_addr ifc_mylladdr; /* my link-local address */ + struct sockaddr_in6 ifc_ripsin; /* rip multicast address */ + struct iff *ifc_filter; /* filter structure */ + struct ifac *ifc_addr; /* list of AF_INET6 addresses */ + int ifc_joined; /* joined to ff02::9 */ +}; + +struct ifac { /* Adddress associated to an interface */ + struct ifc *ifa_conf; /* back pointer */ + struct ifac *ifa_next; + struct in6_addr ifa_addr; /* address */ + struct in6_addr ifa_raddr; /* remote address, valid in p2p */ + int ifa_plen; /* prefix length */ +}; + +struct iff { + int iff_type; + struct in6_addr iff_addr; + int iff_plen; + struct iff *iff_next; +}; + +struct ifc *ifc; +int nifc; /* number of valid ifc's */ +struct ifc **index2ifc; +int nindex2ifc; +struct ifc *loopifcp = NULL; /* pointing to loopback */ +int loopifindex = 0; /* ditto */ +fd_set sockvec; /* vector to select() for receiving */ +int rtsock; /* the routing socket */ +int ripsock; /* socket to send/receive RIP datagram */ + +struct rip6 *ripbuf; /* packet buffer for sending */ + +/* + * Maintain the routes in a linked list. When the number of the routes + * grows, somebody would like to introduce a hash based or a radix tree + * based strucutre. I believe the number of routes handled by RIP is + * limited and I don't have to manage a complex data structure, however. + * + * One of the major drawbacks of the linear linked list is the difficulty + * of representing the relationship between a couple of routes. This may + * be a significant problem when we have to support route aggregation with + * supressing the specifices covered by the aggregate. + */ + +struct riprt { + struct riprt *rrt_next; /* next destination */ + struct riprt *rrt_same; /* same destination - future use */ + struct netinfo6 rrt_info; /* network info */ + struct in6_addr rrt_gw; /* gateway */ + u_long rrt_flags; + time_t rrt_t; /* when the route validated */ + int rrt_index; /* ifindex from which this route got */ +}; + +struct riprt *riprt = 0; + +int dflag = 0; /* debug flag */ +int qflag = 0; /* quiet flag */ +int nflag = 0; /* don't update kernel routing table */ +int aflag = 0; /* age out even the statically defined routes */ +int hflag = 0; /* don't split horizon */ +int lflag = 0; /* exchange site local routes */ +int sflag = 0; /* announce static routes w/ split horizon */ +int Sflag = 0; /* announce static routes to every interface */ +int routetag = 0; /* route tag attached on originating case */ + +char *filter[MAXFILTER]; +int filtertype[MAXFILTER]; +int nfilter = 0; + +pid_t pid; + +struct sockaddr_storage ripsin; + +struct rtentry rtentry; + +int interval = 1; +time_t nextalarm = 0; +time_t sup_trig_update = 0; + +FILE *rtlog = NULL; + +int logopened = 0; + +static u_long seq = 0; + +#define RTF_AGGREGATE 0x08000000 +#define RTF_NOADVERTISE 0x10000000 +#define RTF_NH_NOT_LLADDR 0x20000000 +#define RTF_SENDANYWAY 0x40000000 +#define RTF_CHANGED 0x80000000 +#define RTF_ROUTE_H 0xffff + +extern int errno; + +int main __P((int, char **)); +void ripalarm __P((int)); +void riprecv __P((void)); +void ripsend __P((struct ifc *, struct sockaddr_in6 *, int)); +void init __P((void)); +void sockopt __P((struct ifc *)); +void ifconfig __P((void)); +void ifconfig1 __P((struct ifreq *, struct ifc *, int)); +void rtrecv __P((void)); +int rt_del __P((const struct sockaddr_in6 *, const struct sockaddr_in6 *, + const struct sockaddr_in6 *)); +int rt_deladdr __P((struct ifc *, const struct sockaddr_in6 *, + const struct sockaddr_in6 *)); +void filterconfig __P((void)); +int getifmtu __P((int)); +const char *rttypes __P((struct rt_msghdr *rtm)); +const char *rtflags __P((struct rt_msghdr *rtm)); +const char *ifflags __P((int flags)); +void ifrt __P((struct ifc *, int)); +void applymask __P((struct in6_addr *, struct in6_addr *)); +void applyplen __P((struct in6_addr *, int)); +void ifrtdump __P((int)); +void ifdump __P((int)); +void ifdump0 __P((FILE *, const struct ifc *)); +void rtdump __P((int)); +void rt_entry __P((struct rt_msghdr *, int)); +void rtdexit __P((int)); +void riprequest __P((struct ifc *, struct netinfo6 *, int, struct sockaddr_in6 *)); +void ripflush __P((struct ifc *, struct sockaddr_in6 *)); +void sendrequest __P((struct ifc *)); +int mask2len __P((const struct in6_addr *, int)); +int sendpacket __P((struct sockaddr_in6 *, int)); +int addroute __P((struct riprt *, const struct in6_addr *, struct ifc *)); +int delroute __P((struct netinfo6 *, struct in6_addr *)); +struct in6_addr *getroute __P((struct netinfo6 *, struct in6_addr *)); +void krtread __P((int)); +int tobeadv __P((struct riprt *, struct ifc *)); +char *allocopy __P((char *)); +char *hms __P((void)); +const char *inet6_n2p __P((const struct in6_addr *)); +struct ifac *ifa_match __P((const struct ifc *, const struct in6_addr *, int)); +struct in6_addr *plen2mask __P((int)); +struct riprt *rtsearch __P((struct netinfo6 *)); +int ripinterval __P((int)); +time_t ripsuptrig __P((void)); +void fatal __P((const char *, ...)); +void trace __P((int, const char *, ...)); +void tracet __P((int, const char *, ...)); +unsigned int if_maxindex __P((void)); +struct ifc *ifc_find __P((char *)); +struct iff *iff_find __P((struct ifc *, int)); +void setindex2ifc __P((int, struct ifc *)); + +#define MALLOC(type) ((type *)malloc(sizeof(type))) + +int +main(argc, argv) + int argc; + char **argv; +{ + int ch; + int error = 0; + struct ifc *ifcp; + sigset_t mask, omask; + FILE *pidfile; + extern char *optarg; + extern int optind; + char *progname; + + progname = strrchr(*argv, '/'); + if (progname) + progname++; + else + progname = *argv; + + pid = getpid(); + while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnqsS")) != EOF) { + switch (ch) { + case 'A': + case 'N': + case 'O': + case 'T': + case 'L': + if (nfilter >= MAXFILTER) + fatal("Exceeds MAXFILTER"); + filtertype[nfilter] = ch; + filter[nfilter++] = allocopy(optarg); + break; + case 't': + sscanf(optarg, "%i", &routetag); + if (routetag & ~0xffff) { + fatal("invalid route tag"); + /*NOTREACHED*/ + } + break; + case 'R': + if ((rtlog = fopen(optarg, "w")) == NULL) + fatal("Can not write to routelog"); + break; +#define FLAG(c, flag, n) case c: flag = n; break + FLAG('a', aflag, 1); + FLAG('d', dflag, 1); + FLAG('D', dflag, 2); + FLAG('h', hflag, 1); + FLAG('l', lflag, 1); + FLAG('n', nflag, 1); + FLAG('q', qflag, 1); + FLAG('s', sflag, 1); + FLAG('S', Sflag, 1); +#undef FLAG + default: + fatal("Invalid option specified, terminating"); + } + } + argc -= optind; + argv += optind; + if (argc > 0) + fatal("bogus extra arguments"); + + if (geteuid()) { + nflag = 1; + fprintf(stderr, "No kernel update is allowed\n"); + } + openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON); + logopened++; + init(); + ifconfig(); + for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { + if (ifcp->ifc_index < 0) { + fprintf(stderr, +"No ifindex found at %s (no link-local address?)\n", + ifcp->ifc_name); + error++; + } + } + if (error) + exit(1); + if (loopifcp == NULL) + fatal("No loopback found"); + loopifindex = loopifcp->ifc_index; + for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) + ifrt(ifcp, 0); + filterconfig(); + krtread(0); + if (dflag) + ifrtdump(0); + + if (dflag == 0) { +#if 1 + if (daemon(0, 0) < 0) + fatal("daemon"); +#else + if (fork()) + exit(0); + if (setsid() < 0) + fatal("setid"); +#endif + } + pid = getpid(); + if ((pidfile = fopen(ROUTE6D_PID, "w")) != NULL) { + fprintf(pidfile, "%d\n", pid); + fclose(pidfile); + } + + if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) + fatal("malloc"); + ripbuf->rip6_cmd = RIP6_RESPONSE; + ripbuf->rip6_vers = RIP6_VERSION; + ripbuf->rip6_res1[0] = 0; + ripbuf->rip6_res1[1] = 0; + + if (signal(SIGALRM, ripalarm) == SIG_ERR) + fatal("signal: SIGALRM"); + if (signal(SIGQUIT, rtdexit) == SIG_ERR) + fatal("signal: SIGQUIT"); + if (signal(SIGTERM, rtdexit) == SIG_ERR) + fatal("signal: SIGTERM"); + if (signal(SIGUSR1, ifrtdump) == SIG_ERR) + fatal("signal: SIGUSR1"); + if (signal(SIGHUP, ifrtdump) == SIG_ERR) + fatal("signal: SIGHUP"); + if (signal(SIGINT, ifrtdump) == SIG_ERR) + fatal("signal: SIGINT"); + /* + * To avoid rip packet congestion (not on a cable but in this + * process), wait for a moment to send the first RIP6_RESPONSE + * packets. + */ + alarm(ripinterval(INIT_INTERVAL6)); + + for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { + if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) + sendrequest(ifcp); + } + + syslog(LOG_INFO, "**** Started ****"); + sigemptyset(&mask); + sigaddset(&mask, SIGALRM); + while (1) { + fd_set recvec; + + FD_COPY(&sockvec, &recvec); + switch (select(FD_SETSIZE, &recvec, 0, 0, 0)) { + case -1: + if (errno == EINTR) + continue; + fatal("select"); + case 0: + continue; + default: + if (FD_ISSET(ripsock, &recvec)) { + sigprocmask(SIG_BLOCK, &mask, &omask); + riprecv(); + sigprocmask(SIG_SETMASK, &omask, NULL); + } + if (FD_ISSET(rtsock, &recvec)) { + sigprocmask(SIG_BLOCK, &mask, &omask); + rtrecv(); + sigprocmask(SIG_SETMASK, &omask, NULL); + } + } + } +} + +/* + * gracefully exits after resetting sockopts. + */ +/* ARGSUSED */ +void +rtdexit(sig) + int sig; +{ + struct riprt *rrt; + + alarm(0); + for (rrt = riprt; rrt; rrt = rrt->rrt_next) { + if (rrt->rrt_flags & RTF_AGGREGATE) { + delroute(&rrt->rrt_info, &rrt->rrt_gw); + } + } + close(ripsock); + close(rtsock); + syslog(LOG_INFO, "**** Terminated ****"); + closelog(); + exit(1); +} + +/* + * Called periodically: + * 1. age out the learned route. remove it if necessary. + * 2. submit RIP6_RESPONSE packets. + * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have + * to invoke this function in every 1 or 5 or 10 seconds only to age the + * routes more precisely. + */ +/* ARGSUSED */ +void +ripalarm(sig) + int sig; +{ + struct ifc *ifcp; + struct riprt *rrt, *rrt_prev, *rrt_next; + time_t t_lifetime, t_holddown; + + /* age the RIP routes */ + rrt_prev = 0; + t_lifetime = time(NULL) - RIP_LIFETIME; + t_holddown = t_lifetime - RIP_HOLDDOWN; + for (rrt = riprt; rrt; rrt = rrt_next) { + rrt_next = rrt->rrt_next; + + if (rrt->rrt_t == 0) { + rrt_prev = rrt; + continue; + } + if (rrt->rrt_t < t_holddown) { + if (rrt_prev) { + rrt_prev->rrt_next = rrt->rrt_next; + } else { + riprt = rrt->rrt_next; + } + delroute(&rrt->rrt_info, &rrt->rrt_gw); + free(rrt); + continue; + } + if (rrt->rrt_t < t_lifetime) + rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; + rrt_prev = rrt; + } + /* Supply updates */ + for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { + if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) + ripsend(ifcp, &ifcp->ifc_ripsin, 0); + } + alarm(ripinterval(SUPPLY_INTERVAL6)); +} + +void +init() +{ +#ifdef ADVAPI + int i; +#endif + int int0, int255, error; + struct addrinfo hints, *res; + char port[10]; + + ifc = (struct ifc *)NULL; + nifc = 0; + nindex2ifc = 0; /*initial guess*/ + index2ifc = NULL; + snprintf(port, sizeof(port), "%d", RIP6_PORT); + + memset(&hints, 0, sizeof(hints)); + hints.ai_family = PF_INET6; + hints.ai_socktype = SOCK_DGRAM; + hints.ai_flags = AI_PASSIVE; + error = getaddrinfo(NULL, port, &hints, &res); + if (error) + fatal(gai_strerror(error)); + if (res->ai_next) + fatal(":: resolved to multiple address"); + + int0 = 0; int255 = 255; + ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); + if (ripsock < 0) + fatal("rip socket"); + if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) + fatal("rip bind"); + if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, + &int255, sizeof(int255)) < 0) + fatal("rip IPV6_MULTICAST_HOPS"); + if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, + &int0, sizeof(int0)) < 0) + fatal("rip IPV6_MULTICAST_LOOP"); +#ifdef ADVAPI + i = 1; + if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO, &i, sizeof(i)) < 0) + fatal("rip IPV6_PKTINFO"); +#endif /*ADVAPI*/ + + memset(&hints, 0, sizeof(hints)); + hints.ai_family = PF_INET6; + hints.ai_socktype = SOCK_DGRAM; + error = getaddrinfo(RIP6_DEST, port, &hints, &res); + if (error) + fatal(gai_strerror(error)); + if (res->ai_next) + fatal("%s resolved to multiple address", RIP6_DEST); + memcpy(&ripsin, res->ai_addr, res->ai_addrlen); + +#ifdef FD_ZERO + FD_ZERO(&sockvec); +#else + memset(&sockvec, 0, sizeof(sockvec)); +#endif + FD_SET(ripsock, &sockvec); + + if (nflag == 0) { + if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) + fatal("route socket"); + FD_SET(rtsock, &sockvec); + } else + rtsock = -1; /*just for safety */ +} + +#define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6)) + +/* + * ripflush flushes the rip datagram stored in the rip buffer + */ +static int nrt; +static struct netinfo6 *np; + +void +ripflush(ifcp, sin) + struct ifc *ifcp; + struct sockaddr_in6 *sin; +{ + int i; + int error; + + if (ifcp) + tracet(1, "Send(%s): info(%d) to %s.%d\n", + ifcp->ifc_name, nrt, + inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port)); + else + tracet(1, "Send: info(%d) to %s.%d\n", + nrt, inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port)); + if (dflag >= 2) { + np = ripbuf->rip6_nets; + for (i = 0; i < nrt; i++, np++) { + if (np->rip6_metric == NEXTHOP_METRIC) { + if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) + trace(2, " NextHop reset"); + else { + trace(2, " NextHop %s", + inet6_n2p(&np->rip6_dest)); + } + } else { + trace(2, " %s/%d[%d]", + inet6_n2p(&np->rip6_dest), + np->rip6_plen, np->rip6_metric); + } + if (np->rip6_tag) { + trace(2, " tag=0x%04x", + ntohs(np->rip6_tag) & 0xffff); + } + trace(2, "\n"); + } + } + error = sendpacket(sin, RIPSIZE(nrt)); + if (error == EAFNOSUPPORT) { + /* Protocol not supported */ + tracet(1, "Could not send info to %s (%s): " + "set IFF_UP to 0\n", + ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); + ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ + } + nrt = 0; np = ripbuf->rip6_nets; +} + +/* + * Generate RIP6_RESPONSE packets and send them. + */ +void +ripsend(ifcp, sin, flag) + struct ifc *ifcp; + struct sockaddr_in6 *sin; + int flag; +{ + struct riprt *rrt; + struct in6_addr *nh; /* next hop */ + struct in6_addr ia; + struct iff *iffp; + int maxrte, ok; + + if (ifcp == NULL) { + /* + * Request from non-link local address is not + * a regular route6d update. + */ + maxrte = (IFMINMTU - sizeof(struct ip6_hdr) - + sizeof(struct udphdr) - + sizeof(struct rip6) + sizeof(struct netinfo6)) / + sizeof(struct netinfo6); + nrt = 0; np = ripbuf->rip6_nets; nh = NULL; + for (rrt = riprt; rrt; rrt = rrt->rrt_next) { + if (rrt->rrt_flags & RTF_NOADVERTISE) + continue; + /* Put the route to the buffer */ + *np = rrt->rrt_info; + np++; nrt++; + if (nrt == maxrte) { + ripflush(NULL, sin); + nh = NULL; + } + } + if (nrt) /* Send last packet */ + ripflush(NULL, sin); + return; + } + + if ((flag & RTF_SENDANYWAY) == 0 && + (qflag || (ifcp->ifc_flags & IFF_LOOPBACK))) + return; + if (iff_find(ifcp, 'N') != NULL) + return; + if (iff_find(ifcp, 'T') != NULL) { + struct netinfo6 rrt_info; + memset(&rrt_info, 0, sizeof(struct netinfo6)); + rrt_info.rip6_dest = in6addr_any; + rrt_info.rip6_plen = 0; + rrt_info.rip6_metric = 1; + rrt_info.rip6_tag = htons(routetag & 0xffff); + np = ripbuf->rip6_nets; + *np = rrt_info; + nrt = 1; + ripflush(ifcp, sin); + return; + } + maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) - + sizeof(struct udphdr) - + sizeof(struct rip6) + sizeof(struct netinfo6)) / + sizeof(struct netinfo6); + nrt = 0; np = ripbuf->rip6_nets; nh = NULL; + for (rrt = riprt; rrt; rrt = rrt->rrt_next) { + if (rrt->rrt_flags & RTF_NOADVERTISE) + continue; + /* Need to check filer here */ + ok = 1; + for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { + if (iffp->iff_type != 'A') + continue; + if (rrt->rrt_info.rip6_plen <= iffp->iff_plen) + continue; + ia = rrt->rrt_info.rip6_dest; + applyplen(&ia, iffp->iff_plen); + if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { + ok = 0; + break; + } + } + if (!ok) + continue; + for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { + if (iffp->iff_type != 'O') + continue; + ok = 0; + if (rrt->rrt_info.rip6_plen < iffp->iff_plen) + continue; + ia = rrt->rrt_info.rip6_dest; + applyplen(&ia, iffp->iff_plen); + if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { + ok = 1; + break; + } + } + if (!ok) + continue; + /* Check split horizon and other conditions */ + if (tobeadv(rrt, ifcp) == 0) + continue; + /* Only considers the routes with flag if specified */ + if ((flag & RTF_CHANGED) && (rrt->rrt_flags & RTF_CHANGED) == 0) + continue; + /* Check nexthop */ + if (rrt->rrt_index == ifcp->ifc_index && + !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) && + (rrt->rrt_flags & RTF_NH_NOT_LLADDR) == 0) { + if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) { + if (nrt == maxrte - 2) + ripflush(ifcp, sin); + np->rip6_dest = rrt->rrt_gw; + if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) + SET_IN6_LINKLOCAL_IFINDEX(np->rip6_dest, 0); + np->rip6_plen = 0; + np->rip6_tag = 0; + np->rip6_metric = NEXTHOP_METRIC; + nh = &rrt->rrt_gw; + np++; nrt++; + } + } else if (nh && (rrt->rrt_index != ifcp->ifc_index || + !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) || + rrt->rrt_flags & RTF_NH_NOT_LLADDR)) { + /* Reset nexthop */ + if (nrt == maxrte - 2) + ripflush(ifcp, sin); + memset(np, 0, sizeof(struct netinfo6)); + np->rip6_metric = NEXTHOP_METRIC; + nh = NULL; + np++; nrt++; + } + /* Put the route to the buffer */ + *np = rrt->rrt_info; + np++; nrt++; + if (nrt == maxrte) { + ripflush(ifcp, sin); + nh = NULL; + } + } + if (nrt) /* Send last packet */ + ripflush(ifcp, sin); +} + +/* + * Determine if the route is to be advertised on the specified interface. + * It checks options specified in the arguments and the split horizon rule. + */ +int +tobeadv(rrt, ifcp) + struct riprt *rrt; + struct ifc *ifcp; +{ + + /* Special care for static routes */ + if (rrt->rrt_flags & RTF_STATIC) { + if (Sflag) /* Yes, advertise it anyway */ + return 1; + if (sflag && rrt->rrt_index != ifcp->ifc_index) + return 1; + return 0; + } + /* Regular split horizon */ + if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index) + return 0; + return 1; +} + +/* + * Send a rip packet actually. + */ +int +sendpacket(sin, len) + struct sockaddr_in6 *sin; + int len; +{ + /* + * MSG_DONTROUTE should not be specified when it responds with a + * RIP6_REQUEST message. SO_DONTROUTE has been specified to + * other sockets. + */ +#ifdef ADVAPI + struct msghdr m; + struct cmsghdr *cm; + struct iovec iov[2]; + u_char cmsgbuf[256]; + struct in6_pktinfo *pi; + int index; + struct sockaddr_in6 sincopy; + + /* do not overwrite the given sin */ + sincopy = *sin; + sin = &sincopy; + + if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) + || IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) { + index = IN6_LINKLOCAL_IFINDEX(sin->sin6_addr); + SET_IN6_LINKLOCAL_IFINDEX(sin->sin6_addr, 0); + } else + index = 0; + + m.msg_name = (caddr_t)sin; + m.msg_namelen = sizeof(*sin); + iov[0].iov_base = (caddr_t)ripbuf; + iov[0].iov_len = len; + m.msg_iov = iov; + m.msg_iovlen = 1; + if (!index) { + m.msg_control = NULL; + m.msg_controllen = 0; + } else { + memset(cmsgbuf, 0, sizeof(cmsgbuf)); + cm = (struct cmsghdr *)cmsgbuf; + m.msg_control = (caddr_t)cm; + m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); + + cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); + cm->cmsg_level = IPPROTO_IPV6; + cm->cmsg_type = IPV6_PKTINFO; + pi = (struct in6_pktinfo *)CMSG_DATA(cm); + memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/ + pi->ipi6_ifindex = index; + } + + if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) { + trace(1, "sendmsg: %s\n", strerror(errno)); + return errno; + } +#else + if (sendto(ripsock, ripbuf, len, 0 /*MSG_DONTROUTE*/, + (struct sockaddr *)sin, sizeof(struct sockaddr_in6)) < 0) { + trace(1, "sendto: %s\n", strerror(errno)); + return errno; + } +#endif + return 0; +} + +/* + * Receive and process RIP packets. Update the routes/kernel forwarding + * table if necessary. + */ +void +riprecv() +{ + struct ifc *ifcp, *ic; + struct sockaddr_in6 fsock; + struct in6_addr nh; /* next hop */ + struct rip6 *rp; + struct netinfo6 *np, *nq; + struct riprt *rrt; + int len, nn, need_trigger, index; +#ifndef ADVAPI + int flen; +#endif + char buf[4 * RIP6_MAXMTU]; + time_t t; +#ifdef ADVAPI + struct msghdr m; + struct cmsghdr *cm; + struct iovec iov[2]; + u_char cmsgbuf[256]; + struct in6_pktinfo *pi; +#endif /*ADVAPI*/ + struct iff *iffp; + struct in6_addr ia; + int ok; + + need_trigger = 0; +#ifdef ADVAPI + m.msg_name = (caddr_t)&fsock; + m.msg_namelen = sizeof(fsock); + iov[0].iov_base = (caddr_t)buf; + iov[0].iov_len = sizeof(buf); + m.msg_iov = iov; + m.msg_iovlen = 1; + cm = (struct cmsghdr *)cmsgbuf; + m.msg_control = (caddr_t)cm; + m.msg_controllen = sizeof(cmsgbuf); + if ((len = recvmsg(ripsock, &m, 0)) < 0) + fatal("recvmsg"); + index = 0; + for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m); + cm; + cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) { + if (cm->cmsg_level == IPPROTO_IPV6 + && cm->cmsg_type == IPV6_PKTINFO) { + pi = (struct in6_pktinfo *)(CMSG_DATA(cm)); + index = pi->ipi6_ifindex; + break; + } + } + if (index && IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) + SET_IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr, index); +#else + flen = sizeof(struct sockaddr_in6); + if ((len = recvfrom(ripsock, buf, sizeof(buf), 0, + (struct sockaddr *)&fsock, &flen)) < 0) + fatal("recvfrom"); + if (IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) + index = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr); + else + index = 0; +#endif /*ADVAPI*/ + + nh = fsock.sin6_addr; + nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / + sizeof(struct netinfo6); + rp = (struct rip6 *)buf; + np = rp->rip6_nets; + + if (rp->rip6_vers != RIP6_VERSION) { + trace(1, "Incorrect RIP version %d\n", rp->rip6_vers); + return; + } + if (rp->rip6_cmd == RIP6_REQUEST) { + if (index && index < nindex2ifc) { + ifcp = index2ifc[index]; + riprequest(ifcp, np, nn, &fsock); + } else { + riprequest(NULL, np, nn, &fsock); + } + return; + } + + if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) { + trace(1, "Packets from non-ll addr: %s\n", + inet6_n2p(&fsock.sin6_addr)); + return; /* Ignore packets from non-link-local addr */ + } + index = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr); + ifcp = (index < nindex2ifc) ? index2ifc[index] : NULL; + if (!ifcp) { + trace(1, "Packets to unknown interface index %d\n", index); + return; /* Ignore it */ + } + if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr)) + return; /* The packet is from me; ignore */ + if (rp->rip6_cmd != RIP6_RESPONSE) { + trace(1, "Invalid command %d\n", rp->rip6_cmd); + return; + } + if (iff_find(ifcp, 'N') != NULL) + return; + tracet(1, "Recv(%s): from %s.%d info(%d)\n", + ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), nn); + + t = time(NULL); + for (; nn; nn--, np++) { + if (np->rip6_metric == NEXTHOP_METRIC) { + /* modify neighbor address */ + if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { + nh = np->rip6_dest; + SET_IN6_LINKLOCAL_IFINDEX(nh, index); + trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); + } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) { + nh = fsock.sin6_addr; + trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); + } else { + nh = fsock.sin6_addr; + trace(1, "\tInvalid Nexthop: %s\n", + inet6_n2p(&np->rip6_dest)); + } + continue; + } + if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) { + trace(1, "\tMulticast netinfo6: %s/%d [%d]\n", + inet6_n2p(&np->rip6_dest), + np->rip6_plen, np->rip6_metric); + continue; + } + if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) { + trace(1, "\tLoopback netinfo6: %s/%d [%d]\n", + inet6_n2p(&np->rip6_dest), + np->rip6_plen, np->rip6_metric); + continue; + } + if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { + trace(1, "\tLink Local netinfo6: %s/%d [%d]\n", + inet6_n2p(&np->rip6_dest), + np->rip6_plen, np->rip6_metric); + continue; + } + /* may need to pass sitelocal prefix in some case, however*/ + if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) { + trace(1, "\tSite Local netinfo6: %s/%d [%d]\n", + inet6_n2p(&np->rip6_dest), + np->rip6_plen, np->rip6_metric); + continue; + } + trace(2, "\tnetinfo6: %s/%d [%d]", + inet6_n2p(&np->rip6_dest), + np->rip6_plen, np->rip6_metric); + if (np->rip6_tag) + trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff); + + /* Listen-only filter */ + ok = 1; /* if there's no L filter, it is ok */ + for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { + if (iffp->iff_type != 'L') + continue; + ok = 0; + if (np->rip6_plen < iffp->iff_plen) + continue; + /* special rule: ::/0 means default, not "in /0" */ + if (iffp->iff_plen == 0 && np->rip6_plen > 0) + continue; + ia = np->rip6_dest; + applyplen(&ia, iffp->iff_plen); + if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { + ok = 1; + break; + } + } + if (!ok) { + trace(2, " (filtered)\n"); + continue; + } + + trace(2, "\n"); + np->rip6_metric++; + np->rip6_metric += ifcp->ifc_metric; + if (np->rip6_metric > HOPCNT_INFINITY6) + np->rip6_metric = HOPCNT_INFINITY6; + + applyplen(&np->rip6_dest, np->rip6_plen); + if ((rrt = rtsearch(np)) != NULL) { + if (rrt->rrt_t == 0) + continue; /* Intf route has priority */ + nq = &rrt->rrt_info; + if (nq->rip6_metric > np->rip6_metric) { + if (rrt->rrt_index == ifcp->ifc_index && + IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { + /* Small metric from the same gateway */ + nq->rip6_metric = np->rip6_metric; + } else { + /* Better route found */ + rrt->rrt_index = ifcp->ifc_index; + /* Update routing table */ + delroute(nq, &rrt->rrt_gw); + rrt->rrt_gw = nh; + *nq = *np; + addroute(rrt, &nh, ifcp); + } + rrt->rrt_flags |= RTF_CHANGED; + rrt->rrt_t = t; + need_trigger = 1; + } else if (nq->rip6_metric < np->rip6_metric && + rrt->rrt_index == ifcp->ifc_index && + IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { + /* Got worse route from same gw */ + nq->rip6_metric = np->rip6_metric; + rrt->rrt_t = t; + rrt->rrt_flags |= RTF_CHANGED; + need_trigger = 1; + } else if (nq->rip6_metric == np->rip6_metric && + rrt->rrt_index == ifcp->ifc_index && + IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw) && + np->rip6_metric < HOPCNT_INFINITY6) { + /* same metric, same route from same gw */ + rrt->rrt_t = t; + } + /* + * if nq->rip6_metric == HOPCNT_INFINITY6 then + * do not update age value. Do nothing. + */ + } else if (np->rip6_metric < HOPCNT_INFINITY6) { + /* Got a new valid route */ + if ((rrt = MALLOC(struct riprt)) == NULL) + fatal("malloc: struct riprt"); + nq = &rrt->rrt_info; + + rrt->rrt_same = NULL; + rrt->rrt_index = ifcp->ifc_index; + rrt->rrt_flags = RTF_UP|RTF_GATEWAY; + rrt->rrt_gw = nh; + *nq = *np; + applyplen(&nq->rip6_dest, nq->rip6_plen); + if (nq->rip6_plen == sizeof(struct in6_addr) * 8) + rrt->rrt_flags |= RTF_HOST; + + /* Put the route to the list */ + rrt->rrt_next = riprt; + riprt = rrt; + /* Update routing table */ + addroute(rrt, &nh, ifcp); + rrt->rrt_flags |= RTF_CHANGED; + need_trigger = 1; + rrt->rrt_t = t; + } + } + /* XXX need to care the interval between triggered updates */ + if (need_trigger) { + if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) { + for (ic = ifc; ic; ic = ic->ifc_next) { + if (ifcp->ifc_index == ic->ifc_index) + continue; + if (ic->ifc_flags & IFF_UP) + ripsend(ic, &ic->ifc_ripsin, + RTF_CHANGED); + } + } + /* Reset the flag */ + for (rrt = riprt; rrt; rrt = rrt->rrt_next) + rrt->rrt_flags &= ~RTF_CHANGED; + } +} + +/* + * Send all routes request packet to the specified interface. + */ +void +sendrequest(ifcp) + struct ifc *ifcp; +{ + struct netinfo6 *np; + int error; + + if (ifcp->ifc_flags & IFF_LOOPBACK) + return; + ripbuf->rip6_cmd = RIP6_REQUEST; + np = ripbuf->rip6_nets; + memset(np, 0, sizeof(struct netinfo6)); + np->rip6_metric = HOPCNT_INFINITY6; + tracet(1, "Send rtdump Request to %s (%s)\n", + ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); + error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1)); + if (error == EAFNOSUPPORT) { + /* Protocol not supported */ + tracet(1, "Could not send rtdump Request to %s (%s): " + "set IFF_UP to 0\n", + ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); + ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ + } + ripbuf->rip6_cmd = RIP6_RESPONSE; +} + +/* + * Process a RIP6_REQUEST packet. + */ +void +riprequest(ifcp, np, nn, sin) + struct ifc *ifcp; + struct netinfo6 *np; + int nn; + struct sockaddr_in6 *sin; +{ + int i; + struct riprt *rrt; + + if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) && + np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) { + /* Specific response, don't split-horizon */ + trace(1, "\tRIP Request\n"); + for (i = 0; i < nn; i++, np++) { + rrt = rtsearch(np); + if (rrt) + np->rip6_metric = rrt->rrt_info.rip6_metric; + else + np->rip6_metric = HOPCNT_INFINITY6; + } + (void)sendpacket(sin, RIPSIZE(nn)); + return; + } + /* Whole routing table dump */ + trace(1, "\tRIP Request -- whole routing table\n"); + ripsend(ifcp, sin, RTF_SENDANYWAY); +} + +/* + * Get information of each interface. + */ +void +ifconfig() +{ + int s, i; + char *buf; + struct ifconf ifconf; + struct ifreq *ifrp, ifr; + struct ifc *ifcp; + struct ipv6_mreq mreq; + int bufsiz; + + if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) + fatal("socket"); + + /* wild guess - v4, media, link, v6 * 3 */ + bufsiz = if_maxindex() * sizeof(struct ifreq) * 6; + if ((buf = (char *)malloc(bufsiz)) == NULL) + fatal("malloc"); + + /* + * ioctl(SIOCGIFCONF) does not return error on buffer size. + * we'll try to guess the buffer size by trying it twice, with + * different buffer size. + */ + ifconf.ifc_buf = buf; + ifconf.ifc_len = bufsiz / 2; + if (ioctl(s, SIOCGIFCONF, (char *)&ifconf) < 0) + fatal("ioctl: SIOCGIFCONF"); + i = ifconf.ifc_len; + while (1) { + ifconf.ifc_buf = buf; + ifconf.ifc_len = bufsiz; + if (ioctl(s, SIOCGIFCONF, (char *)&ifconf) < 0) + fatal("ioctl: SIOCGIFCONF"); + if (i == ifconf.ifc_len) + break; + i = ifconf.ifc_len; + bufsiz *= 2; + if ((buf = (char *)realloc(buf, bufsiz)) == NULL) + fatal("realloc"); + } + for (i = 0; i < ifconf.ifc_len; ) { + ifrp = (struct ifreq *)(buf + i); + if (ifrp->ifr_addr.sa_family != AF_INET6) + goto skip; + ifcp = ifc_find(ifrp->ifr_name); + strcpy(ifr.ifr_name, ifrp->ifr_name); + if (ioctl(s, SIOCGIFFLAGS, (char *)&ifr) < 0) + fatal("ioctl: SIOCGIFFLAGS"); + /* we are interested in multicast-capable interfaces */ + if ((ifr.ifr_flags & IFF_MULTICAST) == 0) + goto skip; + if (!ifcp) { + /* new interface */ + ifcp = (struct ifc *)malloc(sizeof(*ifcp)); + memset(ifcp, 0, sizeof(*ifcp)); + ifcp->ifc_index = -1; + ifcp->ifc_next = ifc; + ifc = ifcp; + nifc++; + ifcp->ifc_name = allocopy(ifrp->ifr_name); + ifcp->ifc_addr = 0; + ifcp->ifc_filter = 0; + ifcp->ifc_flags = ifr.ifr_flags; + trace(1, "newif %s <%s>\n", ifcp->ifc_name, + ifflags(ifcp->ifc_flags)); + if (!strcmp(ifcp->ifc_name, LOOPBACK_IF)) + loopifcp = ifcp; + } else { + /* update flag, this may be up again */ + if (ifcp->ifc_flags != ifr.ifr_flags) { + trace(1, "%s: <%s> -> ", ifcp->ifc_name, + ifflags(ifcp->ifc_flags)); + trace(1, "<%s>\n", ifflags(ifr.ifr_flags)); + } + ifcp->ifc_flags = ifr.ifr_flags; + } + ifconfig1(ifrp, ifcp, s); + if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP + && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { + mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; + mreq.ipv6mr_interface = ifcp->ifc_index; + if (setsockopt(ripsock, IPPROTO_IPV6, + IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) < 0) + fatal("IPV6_JOIN_GROUP"); + trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST); + ifcp->ifc_joined++; + } +skip: + i += IFNAMSIZ; + if (ifrp->ifr_addr.sa_len > sizeof(struct sockaddr)) + i += ifrp->ifr_addr.sa_len; + else + i += sizeof(struct sockaddr); + } + close(s); + free(buf); +} + +void +ifconfig1(ifrp, ifcp, s) + struct ifreq *ifrp; + struct ifc *ifcp; + int s; +{ + struct in6_ifreq ifr; + struct sockaddr_in6 *sin; + struct ifac *ifa; + int plen; + char buf[BUFSIZ]; + + sin = (struct sockaddr_in6 *)&ifrp->ifr_addr; + ifr.ifr_addr = *sin; + strcpy(ifr.ifr_name, ifrp->ifr_name); + if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) + fatal("ioctl: SIOCGIFNETMASK_IN6"); + plen = mask2len(&ifr.ifr_addr.sin6_addr, 16); + if ((ifa = ifa_match(ifcp, &sin->sin6_addr, plen)) != NULL) { + /* same interface found */ + /* need check if something changed */ + /* XXX not yet implemented */ + return; + } + /* + * New address is found + */ + if ((ifa = MALLOC(struct ifac)) == NULL) + fatal("malloc: struct ifac"); + ifa->ifa_conf = ifcp; + ifa->ifa_next = ifcp->ifc_addr; + ifcp->ifc_addr = ifa; + ifa->ifa_addr = sin->sin6_addr; + ifa->ifa_plen = plen; + if (ifcp->ifc_flags & IFF_POINTOPOINT) { + ifr.ifr_addr = *sin; + if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) + fatal("ioctl: SIOCGIFDSTADDR_IN6"); + ifa->ifa_raddr = ifr.ifr_dstaddr.sin6_addr; + inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, buf, sizeof(buf)); + trace(1, "found address %s/%d -- %s\n", + inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen, buf); + } else { + trace(1, "found address %s/%d\n", + inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen); + } + if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) { + ifcp->ifc_mylladdr = ifa->ifa_addr; + ifcp->ifc_index = IN6_LINKLOCAL_IFINDEX(ifa->ifa_addr); + memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len); + SET_IN6_LINKLOCAL_IFINDEX(ifcp->ifc_ripsin.sin6_addr, + ifcp->ifc_index); + setindex2ifc(ifcp->ifc_index, ifcp); + ifcp->ifc_mtu = getifmtu(ifcp->ifc_index); + if (ifcp->ifc_mtu > RIP6_MAXMTU) + ifcp->ifc_mtu = RIP6_MAXMTU; + if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) + fatal("ioctl: SIOCGIFMETRIC"); + ifcp->ifc_metric = ifr.ifr_metric; + trace(1, "\tindex: %d, mtu: %d, metric: %d\n", + ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric); + } +} + +/* + * Receive and process routing messages. + * Update interface information as necesssary. + */ +void +rtrecv() +{ + char buf[BUFSIZ]; + char *p, *q; + struct rt_msghdr *rtm; + struct ifa_msghdr *ifam; + struct if_msghdr *ifm; + int len; + struct ifc *ifcp; + int iface = 0, rtable = 0; + struct sockaddr_in6 *rta[RTAX_MAX]; + int i, addrs; + + if ((len = read(rtsock, buf, sizeof(buf))) < 0) { + perror("read from rtsock"); + exit(-1); + } + if (len < sizeof(*rtm)) { + trace(1, "short read from rtsock: %d (should be > %d)\n", + len, sizeof(*rtm)); + return; + } + + for (p = buf; p - buf < len; p += ((struct rt_msghdr *)p)->rtm_msglen) { + /* safety against bogus message */ + if (((struct rt_msghdr *)p)->rtm_msglen <= 0) { + trace(1, "bogus rtmsg: length=%d\n", + ((struct rt_msghdr *)p)->rtm_msglen); + break; + } + rtm = NULL; + ifam = NULL; + ifm = NULL; + switch (((struct rt_msghdr *)p)->rtm_type) { + case RTM_NEWADDR: + case RTM_DELADDR: + ifam = (struct ifa_msghdr *)p; + addrs = ifam->ifam_addrs; + q = (char *)(ifam + 1); + break; + case RTM_IFINFO: + ifm = (struct if_msghdr *)p; + addrs = ifm->ifm_addrs; + q = (char *)(ifm + 1); + break; + default: + rtm = (struct rt_msghdr *)p; + addrs = rtm->rtm_addrs; + q = (char *)(rtm + 1); + if (rtm->rtm_version != RTM_VERSION) { + trace(1, "unexpected rtmsg version %d " + "(should be %d)\n", + rtm->rtm_version, RTM_VERSION); + continue; + } + if (rtm->rtm_pid == pid) { +#if 0 + trace(1, "rtmsg looped back to me, ignored\n"); +#endif + continue; + } + break; + } + memset(&rta, 0, sizeof(rta)); + for (i = 0; i < RTAX_MAX; i++) { + if (addrs & (1 << i)) { + rta[i] = (struct sockaddr_in6 *)q; + q += ROUNDUP(rta[i]->sin6_len); + } + } + + trace(1, "rtsock: %s (addrs=%x)\n", + rttypes((struct rt_msghdr *)p), addrs); + if (dflag >= 2) { + int i; + for (i = 0; + i < ((struct rt_msghdr *)p)->rtm_msglen; + i++) { + fprintf(stderr, "%02x ", p[i] & 0xff); + if (i % 16 == 15) fprintf(stderr, "\n"); + } + fprintf(stderr, "\n"); + } + + /* + * Easy ones first. + * + * We may be able to optimize by using ifm->ifm_index or + * ifam->ifam_index. For simplicity we don't do that here. + */ + switch (((struct rt_msghdr *)p)->rtm_type) { + case RTM_NEWADDR: + case RTM_IFINFO: + iface++; + continue; + case RTM_ADD: + rtable++; + continue; + case RTM_LOSING: + case RTM_MISS: + case RTM_RESOLVE: + case RTM_GET: + case RTM_LOCK: + /* nothing to be done here */ + trace(1, "\tnothing to be done, ignored\n"); + continue; + } + +#if 0 + if (rta[RTAX_DST] == NULL) { + trace(1, "\tno destination, ignored\n"); + continue; + } + if (rta[RTAX_DST]->sin6_family != AF_INET6) { + trace(1, "\taf mismatch, ignored\n"); + continue; + } + if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) { + trace(1, "\tlinklocal destination, ignored\n"); + continue; + } + if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) { + trace(1, "\tloopback destination, ignored\n"); + continue; /* Loopback */ + } + if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) { + trace(1, "\tmulticast destination, ignored\n"); + continue; + } +#endif + + /* hard ones */ + switch (((struct rt_msghdr *)p)->rtm_type) { + case RTM_NEWADDR: + case RTM_IFINFO: + case RTM_ADD: + case RTM_LOSING: + case RTM_MISS: + case RTM_RESOLVE: + case RTM_GET: + case RTM_LOCK: + /* should already be handled */ + fatal("rtrecv: never reach here"); + case RTM_DELETE: + if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY] + || !rta[RTAX_NETMASK]) { + trace(1, "\tsome of dst/gw/netamsk are unavailable, ignored\n"); + break; + } + if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY], rta[RTAX_NETMASK]) == 0) { + rtable++; /*just to be sure*/ + } + break; + case RTM_CHANGE: + case RTM_REDIRECT: + trace(1, "\tnot supported yet, ignored\n"); + break; + case RTM_DELADDR: + if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) { + trace(1, "\tno netmask or ifa given, ignored\n"); + break; + } + if (ifam->ifam_index < nindex2ifc) + ifcp = index2ifc[ifam->ifam_index]; + else + ifcp = NULL; + if (!ifcp) { + trace(1, "\tinvalid ifam_index %d, ignored\n", + ifam->ifam_index); + break; + } + rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK]); + iface++; + break; + case RTM_OLDADD: + case RTM_OLDDEL: + trace(1, "\tnot supported yet, ignored\n"); + break; + } + + } + + if (iface) { + trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n"); + ifconfig(); + for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) + ifrt(ifcp, 1); + } + if (rtable) { + trace(1, "rtsock: read routing table again\n"); + krtread(1); + } +} + +/* + * remove specified route from the internal routing table. + */ +int +rt_del(sdst, sgw, smask) + const struct sockaddr_in6 *sdst; + const struct sockaddr_in6 *sgw; + const struct sockaddr_in6 *smask; +{ + const struct in6_addr *dst = NULL; + const struct in6_addr *gw = NULL; + int prefix; + struct netinfo6 ni6; + struct riprt *rrt = NULL; + time_t t_lifetime; + + if (sdst->sin6_family != AF_INET6) { + trace(1, "\tother AF, ignored\n"); + return -1; + } + if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr) + || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback) + || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) { + trace(1, "\taddress %s not interesting, ignored\n", + inet6_n2p(&sdst->sin6_addr)); + return -1; + } + dst = &sdst->sin6_addr; + if (sgw->sin6_family == AF_INET6 + && smask->sin6_family == AF_INET6) { + /* easy case */ + gw = &sgw->sin6_addr; + prefix = mask2len(&smask->sin6_addr, 16); + } else if (sgw->sin6_family == AF_LINK) { + /* + * Interface route... a hard case. We need to get the prefix + * length from the kernel, but we now are parsing rtmsg. + * We'll purge matching routes from my list, then get the + * fresh list. + */ + struct riprt *longest; + trace(1, "\t%s is a interface route, guessing prefixlen\n", + inet6_n2p(dst)); + longest = NULL; + for (rrt = riprt; rrt; rrt = rrt->rrt_next) { + if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, + &sdst->sin6_addr) + && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) { + if (!longest + || longest->rrt_info.rip6_plen < + rrt->rrt_info.rip6_plen) { + longest = rrt; + } + } + } + rrt = longest; + if (!rrt) { + trace(1, "\tno matching interface route found\n"); + return -1; + } + gw = &in6addr_loopback; + prefix = rrt->rrt_info.rip6_plen; + } else { + trace(1, "\tunsupported af: (gw=%d, mask=%d)\n", + sgw->sin6_family, smask->sin6_family); + return -1; + } + + trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix); + trace(1, "gw %s\n", inet6_n2p(gw)); + t_lifetime = time(NULL) - RIP_LIFETIME; + /* age route for interface address */ + memset(&ni6, 0, sizeof(ni6)); + ni6.rip6_dest = *dst; + ni6.rip6_plen = prefix; + applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ + trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest), + ni6.rip6_plen); + if (!rrt && (rrt = rtsearch(&ni6)) == NULL) { + trace(1, "\tno route found\n"); + return -1; + } + if ((rrt->rrt_flags & RTF_STATIC) == 0) { + trace(1, "\tyou can delete static routes only\n"); + } else if (memcmp(&rrt->rrt_gw, gw, sizeof(rrt->rrt_gw)) != 0) { + trace(1, "\tgw mismatch: %s <-> ", + inet6_n2p(&rrt->rrt_gw)); + trace(1, "%s\n", inet6_n2p(gw)); + } else { + trace(1, "\troute found, age it\n"); + if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { + rrt->rrt_t = t_lifetime; + rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; + } + } + return 0; +} + +/* + * remove specified address from internal interface/routing table. + */ +int +rt_deladdr(ifcp, sifa, smask) + struct ifc *ifcp; + const struct sockaddr_in6 *sifa; + const struct sockaddr_in6 *smask; +{ + const struct in6_addr *addr = NULL; + int prefix; + struct ifac *ifa = NULL; + struct netinfo6 ni6; + struct riprt *rrt = NULL; + time_t t_lifetime; + int updated = 0; + + if (sifa->sin6_family != AF_INET6 || smask->sin6_family != AF_INET6) { + trace(1, "\tother AF, ignored\n"); + return -1; + } + addr = &sifa->sin6_addr; + prefix = mask2len(&smask->sin6_addr, 16); + + trace(1, "\tdeleting %s/%d from %s\n", + inet6_n2p(addr), prefix, ifcp->ifc_name); + ifa = ifa_match(ifcp, addr, prefix); + if (!ifa) { + trace(1, "\tno matching ifa found for %s/%d on %s\n", + inet6_n2p(addr), prefix, ifcp->ifc_name); + return -1; + } + if (ifa->ifa_conf != ifcp) { + trace(1, "\taddress table corrupt: back pointer does not match " + "(%s != %s)\n", + ifcp->ifc_name, ifa->ifa_conf->ifc_name); + return -1; + } + /* remove ifa from interface */ + if (ifcp->ifc_addr == ifa) + ifcp->ifc_addr = ifa->ifa_next; + else { + struct ifac *p; + for (p = ifcp->ifc_addr; p; p = p->ifa_next) { + if (p->ifa_next == ifa) { + p->ifa_next = ifa->ifa_next; + break; + } + } + } + ifa->ifa_next = NULL; + ifa->ifa_conf = NULL; + t_lifetime = time(NULL) - RIP_LIFETIME; + /* age route for interface address */ + memset(&ni6, 0, sizeof(ni6)); + ni6.rip6_dest = ifa->ifa_addr; + ni6.rip6_plen = ifa->ifa_plen; + applyplen(&ni6.rip6_dest, ni6.rip6_plen); + trace(1, "\tfind interface route %s/%d on %d\n", + inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index); + if ((rrt = rtsearch(&ni6)) != NULL) { + struct in6_addr none; + memset(&none, 0, sizeof(none)); + if (rrt->rrt_index == ifcp->ifc_index + && memcmp(&rrt->rrt_gw, &none, sizeof(rrt->rrt_gw)) == 0) { + trace(1, "\troute found, age it\n"); + if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { + rrt->rrt_t = t_lifetime; + rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; + } + updated++; + } else { + trace(1, "\tnon-interface route found: %s/%d on %d\n", + inet6_n2p(&rrt->rrt_info.rip6_dest), + rrt->rrt_info.rip6_plen, + rrt->rrt_index); + } + } else + trace(1, "\tno interface route found\n"); + /* age route for p2p destination */ + if (ifcp->ifc_flags & IFF_POINTOPOINT) { + memset(&ni6, 0, sizeof(ni6)); + ni6.rip6_dest = ifa->ifa_raddr; + ni6.rip6_plen = 128; + applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ + trace(1, "\tfind p2p route %s/%d on %d\n", + inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, + ifcp->ifc_index); + if ((rrt = rtsearch(&ni6)) != NULL) { + if (rrt->rrt_index == ifcp->ifc_index + && memcmp(&rrt->rrt_gw, &ifa->ifa_addr, + sizeof(rrt->rrt_gw)) == 0) { + trace(1, "\troute found, age it\n"); + if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { + rrt->rrt_t = t_lifetime; + rrt->rrt_info.rip6_metric = + HOPCNT_INFINITY6; + updated++; + } + } else { + trace(1, "\tnon-p2p route found: %s/%d on %d\n", + inet6_n2p(&rrt->rrt_info.rip6_dest), + rrt->rrt_info.rip6_plen, + rrt->rrt_index); + } + } else + trace(1, "\tno p2p route found\n"); + } + return updated ? 0 : -1; +} + +/* + * Get each interface address and put those interface routes to the route + * list. + */ +void +ifrt(ifcp, again) + struct ifc *ifcp; + int again; +{ + struct ifac *ifa; + struct riprt *rrt; + struct netinfo6 *np; + + if (ifcp->ifc_flags & IFF_LOOPBACK) + return; /* ignore loopback */ + for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { + if (IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) + continue; /* don't advertise link local addr */ + if ((rrt = MALLOC(struct riprt)) == NULL) + fatal("malloc: struct riprt"); + rrt->rrt_same = NULL; + rrt->rrt_index = ifcp->ifc_index; + rrt->rrt_t = 0; /* don't age */ + rrt->rrt_info.rip6_dest = ifa->ifa_addr; + rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); + rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; + rrt->rrt_info.rip6_plen = ifa->ifa_plen; + applyplen(&rrt->rrt_info.rip6_dest, ifa->ifa_plen); + memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); + np = &rrt->rrt_info; + if (rtsearch(np) == NULL) { + /* Attach the route to the list */ + rrt->rrt_next = riprt; + riprt = rrt; + } else { + /* Already found */ + if (!again) { + trace(1, "route: %s/%d: already registered\n", + inet6_n2p(&np->rip6_dest), + np->rip6_plen); + } + free(rrt); + } + + if (ifcp->ifc_flags & IFF_POINTOPOINT) { + if ((rrt = MALLOC(struct riprt)) == NULL) + fatal("malloc: struct riprt"); + rrt->rrt_same = NULL; + rrt->rrt_index = ifcp->ifc_index; + rrt->rrt_t = 0; /* Don't age */ + rrt->rrt_info.rip6_dest = ifa->ifa_raddr; + rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); + rrt->rrt_info.rip6_metric = 1; + rrt->rrt_info.rip6_plen = 128; + rrt->rrt_gw = ifa->ifa_addr; + rrt->rrt_flags |= RTF_NOADVERTISE; + np = &rrt->rrt_info; + if (rtsearch(np) == NULL) { + /* Attach the route to the list */ + rrt->rrt_next = riprt; + riprt = rrt; + } else { + /* Already found */ + if (!again) { + trace(1, "route: %s/%d: already registered\n", + inet6_n2p(&np->rip6_dest), + np->rip6_plen); + } + free(rrt); + } + } + } +} + +int +getifmtu(ifindex) + int ifindex; +{ + int mib[6]; + char *buf; + size_t msize; + struct if_msghdr *ifm; + int mtu; + + mib[0] = CTL_NET; + mib[1] = PF_ROUTE; + mib[2] = 0; + mib[3] = AF_INET6; + mib[4] = NET_RT_IFLIST; + mib[5] = ifindex; + if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) + fatal("sysctl estimate NET_RT_IFLIST"); + if ((buf = malloc(msize)) == NULL) + fatal("malloc"); + if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) + fatal("sysctl NET_RT_IFLIST"); + ifm = (struct if_msghdr *)buf; + mtu = ifm->ifm_data.ifi_mtu; +#ifdef __FREEBSD__ + if (ifindex != ifm->ifm_index) + fatal("ifindex does not match with ifm_index"); +#endif /* __FREEBSD__ */ + free(buf); + return mtu; +} + +const char * +rttypes(rtm) + struct rt_msghdr *rtm; +{ +#define RTTYPE(s, f) if (rtm->rtm_type == (f)) return (s) + RTTYPE("ADD", RTM_ADD); + RTTYPE("DELETE", RTM_DELETE); + RTTYPE("CHANGE", RTM_CHANGE); + RTTYPE("GET", RTM_GET); + RTTYPE("LOSING", RTM_LOSING); + RTTYPE("REDIRECT", RTM_REDIRECT); + RTTYPE("MISS", RTM_MISS); + RTTYPE("LOCK", RTM_LOCK); + RTTYPE("OLDADD", RTM_OLDADD); + RTTYPE("OLDDEL", RTM_OLDDEL); + RTTYPE("RESOLVE", RTM_RESOLVE); + RTTYPE("NEWADDR", RTM_NEWADDR); + RTTYPE("DELADDR", RTM_DELADDR); + RTTYPE("IFINFO", RTM_IFINFO); +#undef RTTYPE + return NULL; +} + +const char * +rtflags(rtm) + struct rt_msghdr *rtm; +{ + static char buf[BUFSIZ]; + + strcpy(buf, ""); +#define RTFLAG(s, f) if (rtm->rtm_flags & (f)) strcat(buf, (s)) + RTFLAG("U", RTF_UP); + RTFLAG("G", RTF_GATEWAY); + RTFLAG("H", RTF_HOST); + RTFLAG("R", RTF_REJECT); + RTFLAG("D", RTF_DYNAMIC); + RTFLAG("M", RTF_MODIFIED); + RTFLAG("d", RTF_DONE); +#ifdef RTF_MASK + RTFLAG("m", RTF_MASK); +#endif + RTFLAG("C", RTF_CLONING); + RTFLAG("X", RTF_XRESOLVE); + RTFLAG("L", RTF_LLINFO); + RTFLAG("S", RTF_STATIC); + RTFLAG("B", RTF_BLACKHOLE); + RTFLAG("2", RTF_PROTO2); + RTFLAG("1", RTF_PROTO1); +#undef RTFLAG + return buf; +} + +const char * +ifflags(flags) + int flags; +{ + static char buf[BUFSIZ]; + + strcpy(buf, ""); +#define IFFLAG(s, f) \ + if (flags & f) { if (buf[0]) strcat(buf, ","); strcat(buf, s); } + IFFLAG("UP", IFF_UP); + IFFLAG("BROADCAST", IFF_BROADCAST); + IFFLAG("DEBUG", IFF_DEBUG); + IFFLAG("LOOPBACK", IFF_LOOPBACK); + IFFLAG("POINTOPOINT", IFF_POINTOPOINT); +#ifdef IFF_NOTRAILERS + IFFLAG("NOTRAILERS", IFF_NOTRAILERS); +#endif + IFFLAG("RUNNING", IFF_RUNNING); + IFFLAG("NOARP", IFF_NOARP); + IFFLAG("PROMISC", IFF_PROMISC); + IFFLAG("ALLMULTI", IFF_ALLMULTI); + IFFLAG("OACTIVE", IFF_OACTIVE); + IFFLAG("SIMPLEX", IFF_SIMPLEX); + IFFLAG("LINK0", IFF_LINK0); + IFFLAG("LINK1", IFF_LINK1); + IFFLAG("LINK2", IFF_LINK2); + IFFLAG("MULTICAST", IFF_MULTICAST); +#undef IFFLAG + return buf; +} + +void +krtread(again) + int again; +{ + int mib[6]; + size_t msize; + char *buf, *p, *lim; + struct rt_msghdr *rtm; + int retry; + const char *errmsg; + + retry = 0; + buf = NULL; + mib[0] = CTL_NET; + mib[1] = PF_ROUTE; + mib[2] = 0; + mib[3] = AF_INET6; /* Address family */ + mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */ + mib[5] = 0; /* No flags */ + do { + retry++; + errmsg = NULL; + if (buf) + free(buf); + if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) { + errmsg = "sysctl estimate"; + continue; + } + if ((buf = malloc(msize)) == NULL) { + errmsg = "malloc"; + continue; + } + if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) { + errmsg = "sysctl NET_RT_DUMP"; + continue; + } + } while (retry < 5 && errmsg != NULL); + if (errmsg) + fatal("%s (with %d retries, msize=%d)", errmsg, retry, msize); + else if (1 < retry) + syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry); + + lim = buf + msize; + for (p = buf; p < lim; p += rtm->rtm_msglen) { + rtm = (struct rt_msghdr *)p; + rt_entry(rtm, again); + } + free(buf); +} + +void +rt_entry(rtm, again) + struct rt_msghdr *rtm; + int again; +{ + struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask; + struct sockaddr_in6 *sin6_genmask, *sin6_ifp; + char *rtmp, *ifname = NULL; + char buf[BUFSIZ]; + struct riprt *rrt; + struct netinfo6 *np; + int s; + + sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = 0; + if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags & + (RTF_CLONING|RTF_XRESOLVE|RTF_LLINFO|RTF_BLACKHOLE)) + return; /* not interested in the link route */ + rtmp = (char *)(rtm + 1); + /* Destination */ + if ((rtm->rtm_addrs & RTA_DST) == 0) + return; /* ignore routes without destination address */ + sin6_dst = (struct sockaddr_in6 *)rtmp; + rtmp += sin6_dst->sin6_len; + if (rtm->rtm_addrs & RTA_GATEWAY) { + sin6_gw = (struct sockaddr_in6 *)rtmp; + rtmp += ROUNDUP(sin6_gw->sin6_len); + } + if (rtm->rtm_addrs & RTA_NETMASK) { + sin6_mask = (struct sockaddr_in6 *)rtmp; + rtmp += ROUNDUP(sin6_mask->sin6_len); + } + if (rtm->rtm_addrs & RTA_GENMASK) { + sin6_genmask = (struct sockaddr_in6 *)rtmp; + rtmp += ROUNDUP(sin6_genmask->sin6_len); + } + if (rtm->rtm_addrs & RTA_IFP) { + sin6_ifp = (struct sockaddr_in6 *)rtmp; + rtmp += ROUNDUP(sin6_ifp->sin6_len); + } + + /* Destination */ + if (sin6_dst->sin6_family != AF_INET6) + return; + if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr)) + return; /* Link-local */ + if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback)) + return; /* Loopback */ + if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr)) + return; + + if ((rrt = MALLOC(struct riprt)) == NULL) + fatal("malloc: struct riprt"); + np = &rrt->rrt_info; + rrt->rrt_same = NULL; + rrt->rrt_t = time(NULL); + if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC)) + rrt->rrt_t = 0; /* Don't age static routes */ +#if 0 + np->rip6_tag = htons(routetag & 0xffff); +#else + np->rip6_tag = 0; +#endif + np->rip6_metric = rtm->rtm_rmx.rmx_hopcount; + if (np->rip6_metric < 1) + np->rip6_metric = 1; + rrt->rrt_flags = rtm->rtm_flags; + np->rip6_dest = sin6_dst->sin6_addr; + + /* Mask or plen */ + if (rtm->rtm_flags & RTF_HOST) + np->rip6_plen = 128; /* Host route */ + else if (sin6_mask) { + np->rip6_plen = mask2len(&sin6_mask->sin6_addr, + sin6_mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr)); + } else + np->rip6_plen = 0; + + if (rtsearch(np)) { + /* Already found */ + if (!again) { + trace(1, "route: %s/%d flags %s: already registered\n", + inet6_n2p(&np->rip6_dest), np->rip6_plen, + rtflags(rtm)); + } + free(rrt); + return; + } + /* Gateway */ + if (!sin6_gw) + memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); + else { + if (sin6_gw->sin6_family == AF_INET6) + rrt->rrt_gw = sin6_gw->sin6_addr; + else if (sin6_gw->sin6_family == AF_LINK) { + /* XXX in case ppp link? */ + rrt->rrt_gw = in6addr_loopback; + } else + memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); + } + trace(1, "route: %s/%d flags %s", + inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm)); + trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw)); + + /* Interface */ + s = rtm->rtm_index; + if (s < nindex2ifc && index2ifc[s]) + ifname = index2ifc[s]->ifc_name; + else + fatal("Unknown interface %d", s); + trace(1, " if %s sock %d\n", ifname, s); + rrt->rrt_index = s; + + /* Check gateway */ + if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) && + !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw) +#ifdef __FreeBSD__ + && (rrt->rrt_flags & RTF_LOCAL) == 0 +#endif + ) { + inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest, + buf, sizeof(buf)); + trace(0, "***** Gateway %s is not a link-local address.\n", + inet6_n2p(&rrt->rrt_gw)); + trace(0, "***** dest(%s) if(%s) -- Not optimized.\n", + buf, ifname); + rrt->rrt_flags |= RTF_NH_NOT_LLADDR; + } + + /* Put it to the route list */ + rrt->rrt_next = riprt; + riprt = rrt; +} + +int +addroute(rrt, gw, ifcp) + struct riprt *rrt; + const struct in6_addr *gw; + struct ifc *ifcp; +{ + struct netinfo6 *np; + u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ]; + struct rt_msghdr *rtm; + struct sockaddr_in6 *sin; + int len; + + np = &rrt->rrt_info; + inet_ntop(AF_INET6, (void *)gw, (char *)buf1, sizeof(buf1)); + inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2)); + tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n", + inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, + np->rip6_metric - 1, buf2); + if (rtlog) + fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(), + inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, + np->rip6_metric - 1, buf2); + if (nflag) + return 0; + + memset(buf, 0, sizeof(buf)); + rtm = (struct rt_msghdr *)buf; + rtm->rtm_type = RTM_ADD; + rtm->rtm_version = RTM_VERSION; + rtm->rtm_seq = ++seq; + rtm->rtm_pid = pid; + rtm->rtm_flags = rrt->rrt_flags & RTF_ROUTE_H; + rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; + rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1; + rtm->rtm_inits = RTV_HOPCOUNT; + sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; + /* Destination */ + sin->sin6_len = sizeof(struct sockaddr_in6); + sin->sin6_family = AF_INET6; + sin->sin6_addr = np->rip6_dest; + sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); + /* Gateway */ + sin->sin6_len = sizeof(struct sockaddr_in6); + sin->sin6_family = AF_INET6; + sin->sin6_addr = *gw; + sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); + /* Netmask */ + sin->sin6_len = sizeof(struct sockaddr_in6); + sin->sin6_family = AF_INET6; + sin->sin6_addr = *(plen2mask(np->rip6_plen)); + sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); + + len = (char *)sin - (char *)buf; + rtm->rtm_msglen = len; + if (write(rtsock, buf, len) > 0) + return 0; + + if (errno == EEXIST) { + trace(0, "ADD: Route already exists %s/%d gw %s\n", + inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); + if (rtlog) + fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n", + inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); + } else { + trace(0, "Can not write to rtsock (addroute): %s\n", + strerror(errno)); + if (rtlog) + fprintf(rtlog, "\tCan not write to rtsock: %s\n", + strerror(errno)); + } + return -1; +} + +int +delroute(np, gw) + struct netinfo6 *np; + struct in6_addr *gw; +{ + u_char buf[BUFSIZ], buf2[BUFSIZ]; + struct rt_msghdr *rtm; + struct sockaddr_in6 *sin; + int len; + + inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2)); + tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest), + np->rip6_plen, buf2); + if (rtlog) + fprintf(rtlog, "%s: DEL: %s/%d gw %s\n", + hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); + if (nflag) + return 0; + + memset(buf, 0, sizeof(buf)); + rtm = (struct rt_msghdr *)buf; + rtm->rtm_type = RTM_DELETE; + rtm->rtm_version = RTM_VERSION; + rtm->rtm_seq = ++seq; + rtm->rtm_pid = pid; + rtm->rtm_flags = RTF_UP | RTF_GATEWAY; + rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; + sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; + /* Destination */ + sin->sin6_len = sizeof(struct sockaddr_in6); + sin->sin6_family = AF_INET6; + sin->sin6_addr = np->rip6_dest; + sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); + /* Gateway */ + sin->sin6_len = sizeof(struct sockaddr_in6); + sin->sin6_family = AF_INET6; + sin->sin6_addr = *gw; + sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); + /* Netmask */ + sin->sin6_len = sizeof(struct sockaddr_in6); + sin->sin6_family = AF_INET6; + sin->sin6_addr = *(plen2mask(np->rip6_plen)); + sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); + + len = (char *)sin - (char *)buf; + rtm->rtm_msglen = len; + if (write(rtsock, buf, len) >= 0) + return 0; + + if (errno == ESRCH) { + trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n", + inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); + if (rtlog) + fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n", + inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); + } else { + trace(0, "Can not write to rtsock (delroute): %s\n", + strerror(errno)); + if (rtlog) + fprintf(rtlog, "\tCan not write to rtsock: %s\n", + strerror(errno)); + } + return -1; +} + +struct in6_addr * +getroute(np, gw) + struct netinfo6 *np; + struct in6_addr *gw; +{ + u_char buf[BUFSIZ]; + u_long myseq; + int len; + struct rt_msghdr *rtm; + struct sockaddr_in6 *sin; + + rtm = (struct rt_msghdr *)buf; + len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6); + memset(rtm, 0, len); + rtm->rtm_type = RTM_GET; + rtm->rtm_version = RTM_VERSION; + myseq = ++seq; + rtm->rtm_seq = myseq; + rtm->rtm_addrs = RTA_DST; + rtm->rtm_msglen = len; + sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; + sin->sin6_len = sizeof(struct sockaddr_in6); + sin->sin6_family = AF_INET6; + sin->sin6_addr = np->rip6_dest; + if (write(rtsock, buf, len) < 0) { + if (errno == ESRCH) /* No such route found */ + return NULL; + perror("write to rtsock"); + exit(-1); + } + do { + if ((len = read(rtsock, buf, sizeof(buf))) < 0) { + perror("read from rtsock"); + exit(-1); + } + rtm = (struct rt_msghdr *)buf; + } while (rtm->rtm_seq != myseq || rtm->rtm_pid != pid); + sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; + if (rtm->rtm_addrs & RTA_DST) { + sin = (struct sockaddr_in6 *) + ((char *)sin + ROUNDUP(sin->sin6_len)); + } + if (rtm->rtm_addrs & RTA_GATEWAY) { + *gw = sin->sin6_addr; + return gw; + } + return NULL; +} + +const char * +inet6_n2p(p) + const struct in6_addr *p; +{ + static char buf[BUFSIZ]; + + return inet_ntop(AF_INET6, (void *)p, buf, sizeof(buf)); +} + +void +ifrtdump(sig) + int sig; +{ + + ifdump(sig); + rtdump(sig); +} + +void +ifdump(sig) + int sig; +{ + struct ifc *ifcp; + FILE *dump; + int i; + + if (sig == 0) + dump = stderr; + else + if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) + dump = stderr; + + fprintf(dump, "%s: Interface Table Dump\n", hms()); + fprintf(dump, " Number of interfaces: %d\n", nifc); + for (i = 0; i < 2; i++) { + fprintf(dump, " %sadvertising interfaces:\n", i ? "non-" : ""); + for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { + if (i == 0) { + if ((ifcp->ifc_flags & IFF_UP) == 0) + continue; + if (iff_find(ifcp, 'N') != NULL) + continue; + } else { + if (ifcp->ifc_flags & IFF_UP) + continue; + } + ifdump0(dump, ifcp); + } + } + fprintf(dump, "\n"); + if (dump != stderr) + fclose(dump); +} + +void +ifdump0(dump, ifcp) + FILE *dump; + const struct ifc *ifcp; +{ + struct ifac *ifa; + struct iff *iffp; + char buf[BUFSIZ]; + const char *ft; + int addr; + + fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n", + ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags), + inet6_n2p(&ifcp->ifc_mylladdr), + ifcp->ifc_mtu, ifcp->ifc_metric); + for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { + if (ifcp->ifc_flags & IFF_POINTOPOINT) { + inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, + buf, sizeof(buf)); + fprintf(dump, "\t%s/%d -- %s\n", + inet6_n2p(&ifa->ifa_addr), + ifa->ifa_plen, buf); + } else { + fprintf(dump, "\t%s/%d\n", + inet6_n2p(&ifa->ifa_addr), + ifa->ifa_plen); + } + } + if (ifcp->ifc_filter) { + fprintf(dump, "\tFilter:"); + for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { + addr = 0; + switch (iffp->iff_type) { + case 'A': + ft = "Aggregate"; addr++; break; + case 'N': + ft = "No-advertise"; break; + case 'O': + ft = "Advertise-only"; addr++; break; + case 'T': + ft = "Default-only"; break; + case 'L': + ft = "Listen-only"; addr++; break; + default: + snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type); + ft = buf; + addr++; + break; + } + fprintf(dump, " %s", ft); + if (addr) { + fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr), + iffp->iff_plen); + } + } + fprintf(dump, "\n"); + } +} + +void +rtdump(sig) + int sig; +{ + struct riprt *rrt; + char buf[BUFSIZ]; + FILE *dump; + time_t t, age; + + if (sig == 0) + dump = stderr; + else + if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) + dump = stderr; + + t = time(NULL); + fprintf(dump, "\n%s: Routing Table Dump\n", hms()); + for (rrt = riprt; rrt; rrt = rrt->rrt_next) { + if (rrt->rrt_t == 0) + age = 0; + else + age = t - rrt->rrt_t; + inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest, + buf, sizeof(buf)); + fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)", + buf, rrt->rrt_info.rip6_plen, rrt->rrt_index, + index2ifc[rrt->rrt_index]->ifc_name, + inet6_n2p(&rrt->rrt_gw), + rrt->rrt_info.rip6_metric, (long)age); + if (rrt->rrt_info.rip6_tag) { + fprintf(dump, " tag(0x%04x)", + ntohs(rrt->rrt_info.rip6_tag) & 0xffff); + } + if (rrt->rrt_flags & RTF_NH_NOT_LLADDR) + fprintf(dump, " NOT-LL"); + if (rrt->rrt_flags & RTF_NOADVERTISE) + fprintf(dump, " NO-ADV"); + fprintf(dump, "\n"); + } + fprintf(dump, "\n"); + if (dump != stderr) + fclose(dump); +} + +/* + * Parse the -A (and -O) options and put corresponding filter object to the + * specified interface structures. Each of the -A/O option has the following + * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate) + * -O 5f09:c400::/32,ef0,ef1 (only when match) + */ +void +filterconfig() +{ + int i; + char *p, *ap, *iflp, *ifname; + struct iff ftmp, *iff_obj; + struct ifc *ifcp; + struct riprt *rrt; + struct in6_addr gw; + + for (i = 0; i < nfilter; i++) { + ap = filter[i]; + iflp = NULL; + ifcp = NULL; + if (filtertype[i] == 'N' || filtertype[i] == 'T') { + iflp = ap; + goto ifonly; + } + if ((p = index(ap, ',')) != NULL) { + *p++ = '\0'; + iflp = p; + } + if ((p = index(ap, '/')) == NULL) + fatal("no prefixlen specified for '%s'", ap); + *p++ = '\0'; + if (inet_pton(AF_INET6, ap, &ftmp.iff_addr) != 1) + fatal("invalid prefix specified for '%s'", ap); + ftmp.iff_plen = atoi(p); + ftmp.iff_next = NULL; + applyplen(&ftmp.iff_addr, ftmp.iff_plen); +ifonly: + ftmp.iff_type = filtertype[i]; + if (iflp == NULL || *iflp == '\0') + fatal("no interface specified for '%s'", ap); + /* parse the interface listing portion */ + while (iflp) { + ifname = iflp; + if ((iflp = index(iflp, ',')) != NULL) + *iflp++ = '\0'; + ifcp = ifc_find(ifname); + if (ifcp == NULL) + fatal("no interface %s exists", ifname); + iff_obj = (struct iff *)malloc(sizeof(struct iff)); + if (iff_obj == NULL) + fatal("malloc of iff_obj"); + memcpy((void *)iff_obj, (void *)&ftmp, + sizeof(struct iff)); + /* link it to the interface filter */ + iff_obj->iff_next = ifcp->ifc_filter; + ifcp->ifc_filter = iff_obj; + } + if (filtertype[i] != 'A') + continue; + /* put the aggregate to the kernel routing table */ + rrt = (struct riprt *)malloc(sizeof(struct riprt)); + if (rrt == NULL) + fatal("malloc: rrt"); + memset(rrt, 0, sizeof(struct riprt)); + rrt->rrt_info.rip6_dest = ftmp.iff_addr; + rrt->rrt_info.rip6_plen = ftmp.iff_plen; + rrt->rrt_info.rip6_metric = 1; + rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); + rrt->rrt_gw = in6addr_loopback; + rrt->rrt_flags = RTF_UP | RTF_REJECT | RTF_AGGREGATE; + rrt->rrt_t = 0; + rrt->rrt_index = loopifindex; + /* Put the route to the list */ + rrt->rrt_next = riprt; + riprt = rrt; + trace(1, "Aggregate: %s/%d for %s\n", + inet6_n2p(&ftmp.iff_addr), ftmp.iff_plen, + ifcp->ifc_name); + /* Add this route to the kernel */ + if (nflag) /* do not modify kernel routing table */ + continue; + if (getroute(&rrt->rrt_info, &gw)) { + /* + * When the address has already been registered in the + * kernel routing table, it should be removed + */ + delroute(&rrt->rrt_info, &gw); + } + addroute(rrt, &in6addr_loopback, loopifcp); + } +} + +/***************** utility functions *****************/ + +/* + * Returns a pointer to ifac whose address and prefix length matches + * with the address and prefix length specified in the arguments. + */ +struct ifac * +ifa_match(ifcp, ia, plen) + const struct ifc *ifcp; + const struct in6_addr *ia; + int plen; +{ + struct ifac *ifa; + + for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { + if (IN6_ARE_ADDR_EQUAL(&ifa->ifa_addr, ia) && + ifa->ifa_plen == plen) + break; + } + return ifa; +} + +/* + * Return a pointer to riprt structure whose address and prefix length + * matches with the address and prefix length found in the argument. + * Note: This is not a rtalloc(). Therefore exact match is necessary. + */ + +struct riprt * +rtsearch(np) + struct netinfo6 *np; +{ + struct riprt *rrt; + + for (rrt = riprt; rrt; rrt = rrt->rrt_next) { + if (rrt->rrt_info.rip6_plen == np->rip6_plen && + IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, + &np->rip6_dest)) + return rrt; + } + return 0; +} + +int +mask2len(addr, lenlim) + const struct in6_addr *addr; + int lenlim; +{ + int i = 0, j; + u_char *p = (u_char *)addr; + + for (j = 0; j < lenlim; j++, p++) { + if (*p != 0xff) + break; + i += 8; + } + if (j < lenlim) { + switch (*p) { +#define MASKLEN(m, l) case m: i += l; break + MASKLEN(0xfe, 7); + MASKLEN(0xfc, 6); + MASKLEN(0xf8, 5); + MASKLEN(0xf0, 4); + MASKLEN(0xe0, 3); + MASKLEN(0xc0, 2); + MASKLEN(0x80, 1); +#undef MASKLEN + } + } + return i; +} + +void +applymask(addr, mask) + struct in6_addr *addr, *mask; +{ + int i; + u_long *p, *q; + + p = (u_long *)addr; q = (u_long *)mask; + for (i = 0; i < 4; i++) + *p++ &= *q++; +} + +static const u_char plent[8] = { + 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe +}; + +void +applyplen(ia, plen) + struct in6_addr *ia; + int plen; +{ + u_char *p; + int i; + + p = ia->s6_addr; + for (i = 0; i < 16; i++) { + if (plen <= 0) + *p = 0; + else if (plen < 8) + *p &= plent[plen]; + p++, plen -= 8; + } +} + +static const int pl2m[9] = { + 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff +}; + +struct in6_addr * +plen2mask(n) + int n; +{ + static struct in6_addr ia; + u_char *p; + int i; + + memset(&ia, 0, sizeof(struct in6_addr)); + p = (u_char *)&ia; + for (i = 0; i < 16; i++, p++, n -= 8) { + if (n >= 8) { + *p = 0xff; + continue; + } + *p = pl2m[n]; + break; + } + return &ia; +} + +char * +allocopy(p) + char *p; +{ + char *q = (char *)malloc(strlen(p) + 1); + + strcpy(q, p); + return q; +} + +char * +hms() +{ + static char buf[BUFSIZ]; + time_t t; + struct tm *tm; + + t = time(NULL); + if ((tm = localtime(&t)) == 0) + fatal("localtime"); + snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec); + return buf; +} + +#define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */ + +int +ripinterval(timer) + int timer; +{ + double r = rand(); + + interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5)); + nextalarm = time(NULL) + interval; + return interval; +} + +time_t +ripsuptrig() +{ + time_t t; + + double r = rand(); + t = (int)(RIP_TRIG_INT6_MIN + + (RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX )); + sup_trig_update = time(NULL) + t; + return t; +} + +void +#ifdef __STDC__ +fatal(const char *fmt, ...) +#else +fatal(fmt, va_alist) + char *fmt; + va_dcl +#endif +{ + va_list ap; + char buf[1024]; + +#ifdef __STDC__ + va_start(ap, fmt); +#else + va_start(ap); +#endif + vsnprintf(buf, sizeof(buf), fmt, ap); + perror(buf); + syslog(LOG_ERR, "%s: %s", buf, strerror(errno)); + rtdexit(0); + va_end(ap); +} + +void +#ifdef __STDC__ +tracet(int level, const char *fmt, ...) +#else +tracet(level, fmt, va_alist) + int level; + char *fmt; + va_dcl +#endif +{ + va_list ap; + +#ifdef __STDC__ + va_start(ap, fmt); +#else + va_start(ap); +#endif + if (level <= dflag) { + fprintf(stderr, "%s: ", hms()); + vfprintf(stderr, fmt, ap); + } + if (dflag) { + if (level > 0) + vsyslog(LOG_DEBUG, fmt, ap); + else + vsyslog(LOG_WARNING, fmt, ap); + } + va_end(ap); +} + +void +#ifdef __STDC__ +trace(int level, const char *fmt, ...) +#else +trace(level, fmt, va_alist) + int level; + char *fmt; + va_dcl +#endif +{ + va_list ap; + +#ifdef __STDC__ + va_start(ap, fmt); +#else + va_start(ap); +#endif + if (level <= dflag) + vfprintf(stderr, fmt, ap); + if (dflag) { + if (level > 0) + vsyslog(LOG_DEBUG, fmt, ap); + else + vsyslog(LOG_WARNING, fmt, ap); + } + va_end(ap); +} + +unsigned int +if_maxindex() +{ + struct if_nameindex *p, *p0; + unsigned int max = 0; + + p0 = if_nameindex(); + for (p = p0; p && p->if_index && p->if_name; p++) { + if (max < p->if_index) + max = p->if_index; + } + if_freenameindex(p0); + return max; +} + +struct ifc * +ifc_find(name) + char *name; +{ + struct ifc *ifcp; + + for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { + if (strcmp(name, ifcp->ifc_name) == 0) + return ifcp; + } + return (struct ifc *)NULL; +} + +struct iff * +iff_find(ifcp, type) + struct ifc *ifcp; + int type; +{ + struct iff *iffp; + + for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { + if (iffp->iff_type == type) + return iffp; + } + return NULL; +} + +void +setindex2ifc(index, ifcp) + int index; + struct ifc *ifcp; +{ + int n; + + if (!index2ifc) { + nindex2ifc = 5; /*initial guess*/ + index2ifc = (struct ifc **) + malloc(sizeof(*index2ifc) * nindex2ifc); + if (index2ifc == NULL) + fatal("malloc"); + memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc); + } + n = nindex2ifc; + while (nindex2ifc <= index) + nindex2ifc *= 2; + if (n != nindex2ifc) { + index2ifc = (struct ifc **) + realloc(index2ifc, sizeof(*index2ifc) * nindex2ifc); + if (index2ifc == NULL) + fatal("realloc"); + } + index2ifc[index] = ifcp; +} -- cgit v1.1