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NetBSD/usr.sbin/faithd/faithd.c

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/* $NetBSD: faithd.c,v 1.9 2000/02/25 10:05:46 itojun Exp $ */
/*
* Copyright (C) 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.
*/
/*
* User level translator from IPv6 to IPv4.
*
* Usage: faithd [<port> <progpath> <arg1(progname)> <arg2> ...]
* e.g. faithd telnet /usr/local/v6/sbin/telnetd telnetd
*/
#define HAVE_GETIFADDRS
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#ifdef __FreeBSD__
#include <libutil.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include <termios.h>
#include <net/if_types.h>
#ifdef IFT_FAITH
# define USE_ROUTE
# include <net/if.h>
# include <net/route.h>
# include <net/if_dl.h>
#endif
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef HAVE_GETIFADDRS
#include <ifaddrs.h>
#endif
#ifdef FAITH4
#include <resolv.h>
#include <arpa/nameser.h>
#ifndef FAITH_NS
#define FAITH_NS "FAITH_NS"
#endif
#endif
#include "faithd.h"
char *serverpath = NULL;
char *serverarg[MAXARGV + 1];
static char *faithdname = NULL;
char logname[BUFSIZ];
char procname[BUFSIZ];
struct myaddrs {
struct myaddrs *next;
struct sockaddr *addr;
};
struct myaddrs *myaddrs = NULL;
static char *service;
#ifdef USE_ROUTE
static int sockfd = 0;
#endif
int dflag = 0;
static int pflag = 0;
int main __P((int, char **));
static void play_service __P((int));
static void play_child __P((int, struct sockaddr *));
static int faith_prefix __P((struct sockaddr *));
static int map6to4 __P((struct sockaddr_in6 *, struct sockaddr_in *));
#ifdef FAITH4
static int map4to6 __P((struct sockaddr_in *, struct sockaddr_in6 *));
#endif
static void sig_child __P((int));
static void sig_terminate __P((int));
static void start_daemon __P((void));
#ifndef HAVE_GETIFADDRS
static unsigned int if_maxindex __P((void));
#endif
static void grab_myaddrs __P((void));
static void free_myaddrs __P((void));
static void update_myaddrs __P((void));
static void usage __P((void));
int
main(int argc, char *argv[])
{
struct addrinfo hints, *res;
int s_wld, error, i, serverargc, on = 1;
int family = AF_INET6;
int c;
#ifdef FAITH_NS
char *ns;
#endif /* FAITH_NS */
extern int optind;
extern char *optarg;
/*
* Initializing stuff
*/
faithdname = strrchr(argv[0], '/');
if (faithdname)
faithdname++;
else
faithdname = argv[0];
while ((c = getopt(argc, argv, "dp46")) != -1) {
switch (c) {
case 'd':
dflag++;
break;
case 'p':
pflag++;
break;
#ifdef FAITH4
case '4':
family = AF_INET;
break;
case '6':
family = AF_INET6;
break;
#endif
default:
usage();
break;
}
}
argc -= optind;
argv += optind;
#ifdef FAITH_NS
if ((ns = getenv(FAITH_NS)) != NULL) {
struct sockaddr_storage ss;
struct addrinfo hints, *res;
char serv[NI_MAXSERV];
memset(&ss, 0, sizeof(ss));
memset(&hints, 0, sizeof(hints));
snprintf(serv, sizeof(serv), "%u", NAMESERVER_PORT);
hints.ai_flags = AI_NUMERICHOST;
if (getaddrinfo(ns, serv, &hints, &res) == 0) {
res_init();
memcpy(&_res_ext.nsaddr, res->ai_addr, res->ai_addrlen);
_res.nscount = 1;
}
}
#endif /* FAITH_NS */
#ifdef USE_ROUTE
grab_myaddrs();
#endif
switch (argc) {
case 0:
serverpath = DEFAULT_PATH;
serverarg[0] = DEFAULT_NAME;
serverarg[1] = NULL;
service = DEFAULT_PORT_NAME;
break;
default:
serverargc = argc - NUMARG;
if (serverargc > MAXARGV)
exit_error("too many augments");
serverpath = malloc(strlen(argv[NUMPRG]));
strcpy(serverpath, argv[NUMPRG]);
for (i = 0; i < serverargc; i++) {
serverarg[i] = malloc(strlen(argv[i + NUMARG]));
strcpy(serverarg[i], argv[i + NUMARG]);
}
serverarg[i] = NULL;
/* fall throuth */
case 1: /* no local service */
service = argv[NUMPRT];
break;
}
/*
* Opening wild card socket for this service.
*/
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
error = getaddrinfo(NULL, service, &hints, &res);
if (error)
exit_error("getaddrinfo: %s", gai_strerror(error));
s_wld = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s_wld == -1)
exit_error("socket: %s", ERRSTR);
#ifdef IPV6_FAITH
if (res->ai_family == AF_INET6) {
error = setsockopt(s_wld, IPPROTO_IPV6, IPV6_FAITH, &on, sizeof(on));
if (error == -1)
exit_error("setsockopt(IPV6_FAITH): %s", ERRSTR);
}
#endif
#ifdef FAITH4
#ifdef IP_FAITH
if (res->ai_family == AF_INET) {
error = setsockopt(s_wld, IPPROTO_IP, IP_FAITH, &on, sizeof(on));
if (error == -1)
exit_error("setsockopt(IP_FAITH): %s", ERRSTR);
}
#endif
#endif /* FAITH4 */
error = setsockopt(s_wld, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (error == -1)
exit_error("setsockopt(SO_REUSEADDR): %s", ERRSTR);
error = setsockopt(s_wld, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on));
if (error == -1)
exit_error("setsockopt(SO_OOBINLINE): %s", ERRSTR);
error = bind(s_wld, (struct sockaddr *)res->ai_addr, res->ai_addrlen);
if (error == -1)
exit_error("bind: %s", ERRSTR);
error = listen(s_wld, 5);
if (error == -1)
exit_error("listen: %s", ERRSTR);
#ifdef USE_ROUTE
sockfd = socket(PF_ROUTE, SOCK_RAW, PF_UNSPEC);
if (sockfd < 0) {
exit_error("socket(PF_ROUTE): %s", ERRSTR);
/*NOTREACHED*/
}
#endif
/*
* Everything is OK.
*/
start_daemon();
snprintf(logname, sizeof(logname), "faithd %s", service);
snprintf(procname, sizeof(procname), "accepting port %s", service);
openlog(logname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
syslog(LOG_INFO, "Staring faith daemon for %s port", service);
play_service(s_wld);
/*NOTRECHED*/
exit(1); /*pacify gcc*/
}
static void
play_service(int s_wld)
{
struct sockaddr_storage srcaddr;
int len;
int s_src;
pid_t child_pid;
fd_set rfds;
int error;
int maxfd;
/*
* Wait, accept, fork, faith....
*/
again:
setproctitle(procname);
FD_ZERO(&rfds);
FD_SET(s_wld, &rfds);
maxfd = s_wld;
#ifdef USE_ROUTE
if (sockfd) {
FD_SET(sockfd, &rfds);
maxfd = (maxfd < sockfd) ? sockfd : maxfd;
}
#endif
error = select(maxfd + 1, &rfds, NULL, NULL, NULL);
if (error < 0) {
if (errno == EINTR)
goto again;
exit_failure("select: %s", ERRSTR);
/*NOTREACHED*/
}
#ifdef USE_ROUTE
if (FD_ISSET(sockfd, &rfds)) {
update_myaddrs();
}
#endif
if (FD_ISSET(s_wld, &rfds)) {
len = sizeof(srcaddr);
s_src = accept(s_wld, (struct sockaddr *)&srcaddr,
&len);
if (s_src == -1)
exit_failure("socket: %s", ERRSTR);
child_pid = fork();
if (child_pid == 0) {
/* child process */
close(s_wld);
closelog();
openlog(logname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
play_child(s_src, (struct sockaddr *)&srcaddr);
exit_failure("should never reach here");
} else {
/* parent process */
close(s_src);
if (child_pid == -1)
syslog(LOG_ERR, "can't fork");
}
}
goto again;
}
static void
play_child(int s_src, struct sockaddr *srcaddr)
{
struct sockaddr_storage dstaddr6;
struct sockaddr_storage dstaddr4;
char src[MAXHOSTNAMELEN];
char dst6[MAXHOSTNAMELEN];
char dst4[MAXHOSTNAMELEN];
int len = sizeof(dstaddr6);
int s_dst, error, hport, nresvport, on = 1;
struct timeval tv;
struct sockaddr *sa4;
tv.tv_sec = 1;
tv.tv_usec = 0;
getnameinfo(srcaddr, srcaddr->sa_len,
src, sizeof(src), NULL, 0, NI_NUMERICHOST);
syslog(LOG_INFO, "accepted a client from %s", src);
error = getsockname(s_src, (struct sockaddr *)&dstaddr6, &len);
if (error == -1)
exit_failure("getsockname: %s", ERRSTR);
getnameinfo((struct sockaddr *)&dstaddr6, len,
dst6, sizeof(dst6), NULL, 0, NI_NUMERICHOST);
syslog(LOG_INFO, "the client is connecting to %s", dst6);
if (!faith_prefix((struct sockaddr *)&dstaddr6)) {
if (serverpath) {
/*
* Local service
*/
syslog(LOG_INFO, "executing local %s", serverpath);
dup2(s_src, 0);
close(s_src);
dup2(0, 1);
dup2(0, 2);
execv(serverpath, serverarg);
syslog(LOG_ERR, "execv %s: %s", serverpath, ERRSTR);
_exit(EXIT_FAILURE);
} else {
close(s_src);
exit_success("no local service for %s", service);
}
}
/*
* Act as a translator
*/
switch (((struct sockaddr *)&dstaddr6)->sa_family) {
case AF_INET6:
if (!map6to4((struct sockaddr_in6 *)&dstaddr6,
(struct sockaddr_in *)&dstaddr4)) {
close(s_src);
exit_error("map6to4 failed");
}
syslog(LOG_INFO, "translating from v6 to v4");
break;
#ifdef FAITH4
case AF_INET:
if (!map4to6((struct sockaddr_in *)&dstaddr6,
(struct sockaddr_in6 *)&dstaddr4)) {
close(s_src);
exit_error("map4to6 failed");
}
syslog(LOG_INFO, "translating from v4 to v6");
break;
#endif
default:
close(s_src);
exit_error("family not supported");
/*NOTREACHED*/
}
sa4 = (struct sockaddr *)&dstaddr4;
getnameinfo(sa4, sa4->sa_len,
dst4, sizeof(dst4), NULL, 0, NI_NUMERICHOST);
syslog(LOG_INFO, "the translator is connecting to %s", dst4);
setproctitle("port %s, %s -> %s", service, src, dst4);
if (sa4->sa_family == AF_INET6)
hport = ntohs(((struct sockaddr_in6 *)&dstaddr4)->sin6_port);
else /* AF_INET */
hport = ntohs(((struct sockaddr_in *)&dstaddr4)->sin_port);
switch (hport) {
case RLOGIN_PORT:
case RSH_PORT:
s_dst = rresvport_af(&nresvport, sa4->sa_family);
break;
default:
if (pflag)
s_dst = rresvport_af(&nresvport, sa4->sa_family);
else
s_dst = socket(sa4->sa_family, SOCK_STREAM, 0);
break;
}
if (s_dst == -1)
exit_failure("socket: %s", ERRSTR);
error = setsockopt(s_dst, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on));
if (error == -1)
exit_error("setsockopt(SO_OOBINLINE): %s", ERRSTR);
error = setsockopt(s_src, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
if (error == -1)
exit_error("setsockopt(SO_SNDTIMEO): %s", ERRSTR);
error = setsockopt(s_dst, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
if (error == -1)
exit_error("setsockopt(SO_SNDTIMEO): %s", ERRSTR);
error = connect(s_dst, sa4, sa4->sa_len);
if (error == -1)
exit_failure("connect: %s", ERRSTR);
switch (hport) {
case FTP_PORT:
ftp_relay(s_src, s_dst);
break;
case RSH_PORT:
rsh_relay(s_src, s_dst);
break;
default:
tcp_relay(s_src, s_dst, service);
break;
}
/* NOTREACHED */
}
/* 0: non faith, 1: faith */
static int
faith_prefix(struct sockaddr *dst)
{
#ifndef USE_ROUTE
int mib[4], size;
struct in6_addr faith_prefix;
struct sockaddr_in6 *dst6 = (struct sockaddr_in *)dst;
if (dst->sa_family != AF_INET6)
return 0;
mib[0] = CTL_NET;
mib[1] = PF_INET6;
mib[2] = IPPROTO_IPV6;
mib[3] = IPV6CTL_FAITH_PREFIX;
size = sizeof(struct in6_addr);
if (sysctl(mib, 4, &faith_prefix, &size, NULL, 0) < 0)
exit_error("sysctl: %s", ERRSTR);
if (memcmp(dst, &faith_prefix,
sizeof(struct in6_addr) - sizeof(struct in_addr) == 0) {
return 1;
}
return 0;
#else
struct myaddrs *p;
struct sockaddr_in6 *sin6;
struct sockaddr_in *sin4;
struct sockaddr_in6 *dst6;
struct sockaddr_in *dst4;
struct sockaddr_in dstmap;
dst6 = (struct sockaddr_in6 *)dst;
if (dst->sa_family == AF_INET6
&& IN6_IS_ADDR_V4MAPPED(&dst6->sin6_addr)) {
/* ugly... */
memset(&dstmap, 0, sizeof(dstmap));
dstmap.sin_family = AF_INET;
dstmap.sin_len = sizeof(dstmap);
memcpy(&dstmap.sin_addr, &dst6->sin6_addr.s6_addr[12],
sizeof(dstmap.sin_addr));
dst = (struct sockaddr *)&dstmap;
}
dst6 = (struct sockaddr_in6 *)dst;
dst4 = (struct sockaddr_in *)dst;
for (p = myaddrs; p; p = p->next) {
sin6 = (struct sockaddr_in6 *)p->addr;
sin4 = (struct sockaddr_in *)p->addr;
if (p->addr->sa_len != dst->sa_len
|| p->addr->sa_family != dst->sa_family)
continue;
switch (dst->sa_family) {
case AF_INET6:
if (sin6->sin6_scope_id == dst6->sin6_scope_id
&& IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &dst6->sin6_addr))
return 0;
break;
case AF_INET:
if (sin4->sin_addr.s_addr == dst4->sin_addr.s_addr)
return 0;
break;
}
}
return 1;
#endif
}
/* 0: non faith, 1: faith */
static int
map6to4(struct sockaddr_in6 *dst6, struct sockaddr_in *dst4)
{
memset(dst4, 0, sizeof(*dst4));
dst4->sin_len = sizeof(*dst4);
dst4->sin_family = AF_INET;
dst4->sin_port = dst6->sin6_port;
memcpy(&dst4->sin_addr, &dst6->sin6_addr.s6_addr[12],
sizeof(dst4->sin_addr));
if (dst4->sin_addr.s_addr == INADDR_ANY
|| dst4->sin_addr.s_addr == INADDR_BROADCAST
|| IN_MULTICAST(dst4->sin_addr.s_addr))
return 0;
return 1;
}
#ifdef FAITH4
/* 0: non faith, 1: faith */
static int
map4to6(struct sockaddr_in *dst4, struct sockaddr_in6 *dst6)
{
char host[NI_MAXHOST];
char serv[NI_MAXSERV];
struct addrinfo hints, *res;
int ai_errno;
if (getnameinfo((struct sockaddr *)dst4, dst4->sin_len, host, sizeof(host),
serv, sizeof(serv), NI_NAMEREQD|NI_NUMERICSERV) != 0)
return 0;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
if ((ai_errno = getaddrinfo(host, serv, &hints, &res)) != 0) {
syslog(LOG_INFO, "%s %s: %s", host, serv, gai_strerror(ai_errno));
return 0;
}
memcpy(dst6, res->ai_addr, res->ai_addrlen);
freeaddrinfo(res);
return 1;
}
#endif /* FAITH4 */
static void
sig_child(int sig)
{
int status;
pid_t pid;
pid = wait3(&status, WNOHANG, (struct rusage *)0);
if (pid && status)
syslog(LOG_WARNING, "child %d exit status 0x%x", pid, status);
}
void
sig_terminate(int sig)
{
syslog(LOG_INFO, "Terminating faith daemon");
exit(EXIT_SUCCESS);
}
static void
start_daemon(void)
{
if (daemon(0, 0) == -1)
exit_error("daemon: %s", ERRSTR);
if (signal(SIGCHLD, sig_child) == SIG_ERR)
exit_failure("signal CHLD: %s", ERRSTR);
if (signal(SIGTERM, sig_terminate) == SIG_ERR)
exit_failure("signal TERM: %s", ERRSTR);
}
void
exit_error(const char *fmt, ...)
{
va_list ap;
char buf[BUFSIZ];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
fprintf(stderr, "%s\n", buf);
exit(EXIT_FAILURE);
}
void
exit_failure(const char *fmt, ...)
{
va_list ap;
char buf[BUFSIZ];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
syslog(LOG_ERR, buf);
exit(EXIT_FAILURE);
}
void
exit_success(const char *fmt, ...)
{
va_list ap;
char buf[BUFSIZ];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
syslog(LOG_INFO, buf);
exit(EXIT_SUCCESS);
}
#ifdef USE_ROUTE
#ifndef HAVE_GETIFADDRS
static 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;
}
#endif
static void
grab_myaddrs()
{
#ifdef HAVE_GETIFADDRS
struct ifaddrs *ifap, *ifa;
struct myaddrs *p;
struct sockaddr_in6 *sin6;
if (getifaddrs(&ifap) != 0) {
exit_failure("getifaddrs");
/*NOTREACHED*/
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
switch (ifa->ifa_addr->sa_family) {
case AF_INET:
case AF_INET6:
break;
default:
continue;
}
p = (struct myaddrs *)malloc(sizeof(struct myaddrs) +
ifa->ifa_addr->sa_len);
if (!p) {
exit_failure("not enough core");
/*NOTREACHED*/
}
memcpy(p + 1, ifa->ifa_addr, ifa->ifa_addr->sa_len);
p->next = myaddrs;
p->addr = (struct sockaddr *)(p + 1);
#ifdef __KAME__
if (ifa->ifa_addr->sa_family == AF_INET6) {
sin6 = (struct sockaddr_in6 *)p->addr;
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)
|| IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
sin6->sin6_scope_id =
ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
sin6->sin6_addr.s6_addr[2] = 0;
sin6->sin6_addr.s6_addr[3] = 0;
}
}
#endif
myaddrs = p;
if (dflag) {
char hbuf[NI_MAXHOST];
getnameinfo(p->addr, p->addr->sa_len,
hbuf, sizeof(hbuf), NULL, 0,
NI_NUMERICHOST);
syslog(LOG_INFO, "my interface: %s %s", hbuf,
ifa->ifa_name);
}
}
freeifaddrs(ifap);
#else
int s;
unsigned int maxif;
struct ifreq *iflist;
struct ifconf ifconf;
struct ifreq *ifr, *ifrp, *ifr_end;
struct myaddrs *p;
struct sockaddr_in6 *sin6;
size_t siz;
char ifrbuf[sizeof(struct ifreq) + 1024];
maxif = if_maxindex() + 1;
iflist = (struct ifreq *)malloc(maxif * BUFSIZ); /* XXX */
if (!iflist) {
exit_failure("not enough core");
/*NOTREACHED*/
}
if ((s = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
exit_failure("socket(SOCK_DGRAM)");
/*NOTREACHED*/
}
memset(&ifconf, 0, sizeof(ifconf));
ifconf.ifc_req = iflist;
ifconf.ifc_len = maxif * BUFSIZ; /* XXX */
if (ioctl(s, SIOCGIFCONF, &ifconf) < 0) {
exit_failure("ioctl(SIOCGIFCONF)");
/*NOTREACHED*/
}
close(s);
/* Look for this interface in the list */
ifr_end = (struct ifreq *) (ifconf.ifc_buf + ifconf.ifc_len);
for (ifrp = ifconf.ifc_req;
ifrp < ifr_end;
ifrp = (struct ifreq *)((char *)ifrp + siz)) {
memcpy(ifrbuf, ifrp, sizeof(*ifrp));
ifr = (struct ifreq *)ifrbuf;
siz = ifr->ifr_addr.sa_len;
if (siz < sizeof(ifr->ifr_addr))
siz = sizeof(ifr->ifr_addr);
siz += (sizeof(*ifrp) - sizeof(ifr->ifr_addr));
if (siz > sizeof(ifrbuf)) {
/* ifr too big */
break;
}
memcpy(ifrbuf, ifrp, siz);
switch (ifr->ifr_addr.sa_family) {
case AF_INET:
case AF_INET6:
p = (struct myaddrs *)malloc(sizeof(struct myaddrs)
+ ifr->ifr_addr.sa_len);
if (!p) {
exit_failure("not enough core");
/*NOTREACHED*/
}
memcpy(p + 1, &ifr->ifr_addr, ifr->ifr_addr.sa_len);
p->next = myaddrs;
p->addr = (struct sockaddr *)(p + 1);
#ifdef __KAME__
if (ifr->ifr_addr.sa_family == AF_INET6) {
sin6 = (struct sockaddr_in6 *)p->addr;
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)
|| IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
sin6->sin6_scope_id =
ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
sin6->sin6_addr.s6_addr[2] = 0;
sin6->sin6_addr.s6_addr[3] = 0;
}
}
#endif
myaddrs = p;
if (dflag) {
char hbuf[NI_MAXHOST];
getnameinfo(p->addr, p->addr->sa_len,
hbuf, sizeof(hbuf), NULL, 0,
NI_NUMERICHOST);
syslog(LOG_INFO, "my interface: %s %s", hbuf, ifr->ifr_name);
}
break;
default:
break;
}
}
free(iflist);
#endif
}
static void
free_myaddrs()
{
struct myaddrs *p, *q;
p = myaddrs;
while (p) {
q = p->next;
free(p);
p = q;
}
myaddrs = NULL;
}
static void
update_myaddrs()
{
char msg[BUFSIZ];
int len;
struct rt_msghdr *rtm;
len = read(sockfd, msg, sizeof(msg));
if (len < 0) {
syslog(LOG_ERR, "read(PF_ROUTE) failed");
return;
}
rtm = (struct rt_msghdr *)msg;
if (len < 4 || len < rtm->rtm_msglen) {
syslog(LOG_ERR, "read(PF_ROUTE) short read");
return;
}
if (rtm->rtm_version != RTM_VERSION) {
syslog(LOG_ERR, "routing socket version mismatch");
close(sockfd);
sockfd = 0;
return;
}
switch (rtm->rtm_type) {
case RTM_NEWADDR:
case RTM_DELADDR:
case RTM_IFINFO:
break;
default:
return;
}
/* XXX more filters here? */
syslog(LOG_INFO, "update interface address list");
free_myaddrs();
grab_myaddrs();
}
#endif /*USE_ROUTE*/
static void
usage()
{
fprintf(stderr, "usage: %s [-dp] [service [serverpath [serverargs]]]\n",
faithdname);
exit(0);
}
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