--- /dev/null 2009-10-06 05:27:55.000000000 +0900 +++ sbin/ifconfig/af_nd6.c 2009-09-27 04:23:24.000000000 +0900 @@ -0,0 +1,251 @@ +/* + * Copyright (c) 2009 Hiroki Sato. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + */ + +#ifndef lint +static const char rcsid[] = + "$FreeBSD: stable/8/sbin/ifconfig/af_nd6.c 197138 2009-09-12 22:08:20Z hrs $"; +#endif /* not lint */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include + +#include + +#include "ifconfig.h" + +#define MAX_SYSCTL_TRY 5 + +static struct nd6_opt_list { + const char *label; + u_int mask; +} nd6_opts[] = { + { "IFDISABLED", ND6_IFF_IFDISABLED, }, + { "PERFORMNUD", ND6_IFF_PERFORMNUD, }, + { "ACCEPT_RTADV", ND6_IFF_ACCEPT_RTADV, }, + { "PREFER_SOURCE", ND6_IFF_PREFER_SOURCE, }, + { "AUTO_LINKLOCAL", ND6_IFF_AUTO_LINKLOCAL, }, +}; + +static int isnd6defif(int); +void setnd6flags(const char *, int, int, const struct afswtch *); +void setnd6defif(const char *, int, int, const struct afswtch *); + +void +setnd6flags(const char *dummyaddr __unused, + int d, int s, + const struct afswtch *afp) +{ + struct in6_ndireq nd; + int error; + + memset(&nd, 0, sizeof(nd)); + strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname)); + error = ioctl(s, SIOCGIFINFO_IN6, &nd); + if (error) { + warn("ioctl(SIOCGIFINFO_IN6)"); + return; + } + if (d < 0) + nd.ndi.flags &= ~(-d); + else + nd.ndi.flags |= d; + error = ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd); + if (error) + warn("ioctl(SIOCSIFINFO_IN6)"); +} + +void +setnd6defif(const char *dummyaddr __unused, + int d, int s, + const struct afswtch *afp) +{ + struct in6_ndifreq ndifreq; + int ifindex; + int error; + + memset(&ndifreq, 0, sizeof(ndifreq)); + strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); + + if (d < 0) { + if (isnd6defif(s)) { + /* ifindex = 0 means to remove default if */ + ifindex = 0; + } else + return; + } else if ((ifindex = if_nametoindex(ndifreq.ifname)) == 0) { + warn("if_nametoindex(%s)", ndifreq.ifname); + return; + } + + ndifreq.ifindex = ifindex; + error = ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq); + if (error) + warn("ioctl(SIOCSDEFIFACE_IN6)"); +} + +static int +isnd6defif(int s) +{ + struct in6_ndifreq ndifreq; + unsigned int ifindex; + int error; + + memset(&ndifreq, 0, sizeof(ndifreq)); + strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); + + ifindex = if_nametoindex(ndifreq.ifname); + error = ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq); + if (error) { + warn("ioctl(SIOCGDEFIFACE_IN6)"); + return (error); + } + return (ndifreq.ifindex == ifindex); +} + +static void +nd6_status(int s) +{ + struct in6_ndireq nd; + struct rt_msghdr *rtm; + size_t needed; + char *buf, *next; + int mib[6], ntry; + int s6; + int i, error; + int isinet6, isdefif; + int nopts; + + /* Check if the interface has at least one IPv6 address. */ + mib[0] = CTL_NET; + mib[1] = PF_ROUTE; + mib[2] = 0; + mib[3] = AF_INET6; + mib[4] = NET_RT_IFLIST; + mib[5] = if_nametoindex(ifr.ifr_name); + + /* Try to prevent a race between two sysctls. */ + ntry = 0; + do { + error = sysctl(mib, 6, NULL, &needed, NULL, 0); + if (error) { + warn("sysctl(NET_RT_IFLIST)/estimate"); + return; + } + buf = malloc(needed); + if (buf == NULL) { + warn("malloc for sysctl(NET_RT_IFLIST) failed"); + return; + } + if ((error = sysctl(mib, 6, buf, &needed, NULL, 0)) < 0) { + if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) { + warn("sysctl(NET_RT_IFLIST)/get"); + free(buf); + return; + } + free(buf); + buf = NULL; + } + } while (buf == NULL); + + isinet6 = 0; + for (next = buf; next < buf + needed; next += rtm->rtm_msglen) { + rtm = (struct rt_msghdr *)next; + + if (rtm->rtm_version != RTM_VERSION) + continue; + if (rtm->rtm_type == RTM_NEWADDR) { + isinet6 = 1; + break; + } + } + free(buf); + if (!isinet6) + return; + + memset(&nd, 0, sizeof(nd)); + strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname)); + if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { + warn("socket(AF_INET6, SOCK_DGRAM)"); + return; + } + error = ioctl(s6, SIOCGIFINFO_IN6, &nd); + if (error) { + warn("ioctl(SIOCGIFINFO_IN6)"); + close(s6); + return; + } + isdefif = isnd6defif(s6); + close(s6); + if (nd.ndi.flags == 0 && !isdefif) + return; + + nopts = 0; + printf("\tnd6 options=%d<", nd.ndi.flags); + for (i=0; i < sizeof(nd6_opts)/sizeof(nd6_opts[0]); i++) { + if (nd.ndi.flags & nd6_opts[i].mask) { + if (nopts++) + printf(","); + printf("%s", nd6_opts[i].label); + } + } + if (isdefif) { + if (nopts) + printf(","); + printf("DEFAULTIF"); + } + printf(">\n"); +} + +static struct afswtch af_nd6 = { + .af_name = "nd6", + .af_af = AF_LOCAL, + .af_other_status= nd6_status, +}; + +static __constructor void +nd6_ctor(void) +{ + af_register(&af_nd6); +}