/* * Copyright (c) 2009-2011, 2020 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1983, 1993 * The Regents of the University of California. 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. * 4. Neither the name of the University 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 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. */ #include #include #include #include #include #include #include #include #include #include #include #include /* for struct ifaddr */ #include #include #include #include "ifconfig.h" static struct ifaliasreq in_addreq; static struct ifreq in_ridreq; static void in_status(int s __unused, const struct ifaddrs *ifa) { struct sockaddr_in *sin, null_sin; memset(&null_sin, 0, sizeof(null_sin)); sin = (struct sockaddr_in *)ifa->ifa_addr; if (sin == NULL) return; printf("\tinet %s ", inet_ntoa(sin->sin_addr)); if (ifa->ifa_flags & IFF_POINTOPOINT) { sin = (struct sockaddr_in *)ifa->ifa_dstaddr; if (sin == NULL) sin = &null_sin; printf("--> %s ", inet_ntoa(sin->sin_addr)); } sin = (struct sockaddr_in *)ifa->ifa_netmask; if (sin == NULL) sin = &null_sin; printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); if (ifa->ifa_flags & IFF_BROADCAST) { sin = (struct sockaddr_in *)ifa->ifa_broadaddr; if (sin != NULL && sin->sin_addr.s_addr != 0) printf("broadcast %s", inet_ntoa(sin->sin_addr)); } putchar('\n'); } #define SIN(x) ((struct sockaddr_in *) &(x)) static struct sockaddr_in *sintab[] = { SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) }; static void in_getaddr(const char *s, int which) { #ifndef MIN #define MIN(a,b) ((a)<(b)?(a):(b)) #endif /* MIN */ struct sockaddr_in *sin = sintab[which]; struct hostent *hp; struct netent *np; sin->sin_len = sizeof(*sin); if (which != MASK) sin->sin_family = AF_INET; if (which == ADDR) { char *p = NULL; if((p = strrchr(s, '/')) != NULL) { /* address is `name/masklen' */ int masklen; int ret; struct sockaddr_in *min = sintab[MASK]; *p = '\0'; ret = sscanf(p+1, "%u", &masklen); if(ret != 1 || (masklen < 0 || masklen > 32)) { *p = '/'; errx(1, "%s: bad value", s); } min->sin_len = sizeof(*min); min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 0xffffffff); } } if (inet_aton(s, &sin->sin_addr)) return; if ((hp = gethostbyname(s)) != 0) bcopy(hp->h_addr, (char *)&sin->sin_addr, MIN(hp->h_length, sizeof(sin->sin_addr))); else if ((np = getnetbyname(s)) != 0) sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); else errx(1, "%s: bad value", s); #undef MIN } static void in_status_tunnel(int s) { char src[NI_MAXHOST]; char dst[NI_MAXHOST]; struct ifreq ifr; const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) return; if (sa->sa_family != AF_INET) return; if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) src[0] = '\0'; if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) return; if (sa->sa_family != AF_INET) return; if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) dst[0] = '\0'; printf("\ttunnel inet %s --> %s\n", src, dst); } static void in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) { struct ifaliasreq addreq; memset(&addreq, 0, sizeof(addreq)); strlcpy(addreq.ifra_name, name, sizeof(addreq.ifra_name)); memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) warn("SIOCSIFPHYADDR"); } static void in_set_router(int s, int enable) { struct ifreq ifr; bzero(&ifr, sizeof (ifr)); strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); ifr.ifr_intval = enable; if (ioctl(s, SIOCSETROUTERMODE, &ifr) < 0) warn("SIOCSETROUTERMODE"); } static int routermode_from_string(char * str, int *mode_p) { int success = 1; if (strcasecmp(str, "enabled") == 0) { *mode_p = 1; } else if (strcasecmp(str, "disabled") == 0) { *mode_p = 0; } else { success = 0; } return (success); } static const char * routermode_string(int mode) { const char * str; switch (mode) { case 0: str = "disabled"; break; case 1: str = "enabled"; break; default: str = ""; break; } return str; } static int in_routermode(int s, int argc, char *const*argv) { struct ifreq ifr; int ret; bzero(&ifr, sizeof (ifr)); strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); if (argc == 0) { ret = 0; #ifndef SIOCGETROUTERMODE #define SIOCGETROUTERMODE _IOWR('i', 209, struct ifreq) /* get IPv4 router mode state */ #endif /* SIOCGETROUTERMODE */ if (ioctl(s, SIOCGETROUTERMODE, &ifr) < 0) { if (argv != NULL) { warn("SIOCGETROUTERMODE"); } } else { /* argv is NULL if we're called from status() */ printf("%s%s\n", (argv == NULL) ? "\troutermode4: " : "", routermode_string(ifr.ifr_intval)); } ret = 0; } else { int mode; if (routermode_from_string(argv[0], &mode) == 0) { errx(EXIT_FAILURE, "mode '%s' invalid, must be one of " "disabled or enabled", argv[0]); } ifr.ifr_intval = mode; if (ioctl(s, SIOCSETROUTERMODE, &ifr) < 0) { warn("SIOCSETROUTERMODE"); } ret = 1; } return ret; } static struct afswtch af_inet = { .af_name = "inet", .af_af = AF_INET, .af_status = in_status, .af_getaddr = in_getaddr, .af_status_tunnel = in_status_tunnel, .af_settunnel = in_set_tunnel, .af_setrouter = in_set_router, .af_routermode = in_routermode, .af_difaddr = SIOCDIFADDR, .af_aifaddr = SIOCAIFADDR, .af_ridreq = &in_ridreq, .af_addreq = &in_addreq, }; static __constructor void inet_ctor(void) { af_register(&af_inet); }