mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-01-29 15:43:52 +00:00
Stashing utun work for OSX -- abandoning for now since utun excludes mDNS among other issues.
This commit is contained in:
Adam Ierymenko
parent
0940d673db
commit
8ac411a9e4
832
attic/OSXEthernetTap.cpp.utun-work-in-progress
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832
attic/OSXEthernetTap.cpp.utun-work-in-progress
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@ -0,0 +1,832 @@
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/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2015 ZeroTier, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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#include <sys/select.h>
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#include <sys/cdefs.h>
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#include <sys/uio.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/sys_domain.h>
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#include <sys/kern_control.h>
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#include <net/if_utun.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <net/route.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <netinet6/in6_var.h>
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#include <netinet/in_var.h>
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#include <netinet/icmp6.h>
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// OSX compile fix... in6_var defines this in a struct which namespaces it for C++ ... why?!?
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struct prf_ra {
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u_char onlink : 1;
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u_char autonomous : 1;
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u_char reserved : 6;
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} prf_ra;
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#include <netinet6/nd6.h>
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#include <ifaddrs.h>
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// These are KERNEL_PRIVATE... why?
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#ifndef SIOCAUTOCONF_START
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#define SIOCAUTOCONF_START _IOWR('i', 132, struct in6_ifreq) /* accept rtadvd on this interface */
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#endif
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#ifndef SIOCAUTOCONF_STOP
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#define SIOCAUTOCONF_STOP _IOWR('i', 133, struct in6_ifreq) /* stop accepting rtadv for this interface */
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#endif
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// This source is from:
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// http://www.opensource.apple.com/source/Libinfo/Libinfo-406.17/gen.subproj/getifmaddrs.c?txt
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// It's here because OSX 10.6 does not have this convenience function.
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#define SALIGN (sizeof(uint32_t) - 1)
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#define SA_RLEN(sa) ((sa)->sa_len ? (((sa)->sa_len + SALIGN) & ~SALIGN) : \
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(SALIGN + 1))
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#define MAX_SYSCTL_TRY 5
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#define RTA_MASKS (RTA_GATEWAY | RTA_IFP | RTA_IFA)
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/* FreeBSD uses NET_RT_IFMALIST and RTM_NEWMADDR from <sys/socket.h> */
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/* We can use NET_RT_IFLIST2 and RTM_NEWMADDR2 on Darwin */
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//#define DARWIN_COMPAT
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//#ifdef DARWIN_COMPAT
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#define GIM_SYSCTL_MIB NET_RT_IFLIST2
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#define GIM_RTM_ADDR RTM_NEWMADDR2
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//#else
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//#define GIM_SYSCTL_MIB NET_RT_IFMALIST
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//#define GIM_RTM_ADDR RTM_NEWMADDR
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//#endif
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// Not in 10.6 includes so use our own
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struct _intl_ifmaddrs {
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struct _intl_ifmaddrs *ifma_next;
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struct sockaddr *ifma_name;
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struct sockaddr *ifma_addr;
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struct sockaddr *ifma_lladdr;
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};
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static inline int _intl_getifmaddrs(struct _intl_ifmaddrs **pif)
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{
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int icnt = 1;
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int dcnt = 0;
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int ntry = 0;
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size_t len;
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size_t needed;
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int mib[6];
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int i;
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char *buf;
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char *data;
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char *next;
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char *p;
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struct ifma_msghdr2 *ifmam;
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struct _intl_ifmaddrs *ifa, *ift;
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struct rt_msghdr *rtm;
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struct sockaddr *sa;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0; /* protocol */
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mib[3] = 0; /* wildcard address family */
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mib[4] = GIM_SYSCTL_MIB;
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mib[5] = 0; /* no flags */
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do {
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if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
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return (-1);
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if ((buf = (char *)malloc(needed)) == NULL)
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return (-1);
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if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
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if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
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free(buf);
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return (-1);
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}
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free(buf);
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buf = NULL;
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}
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} while (buf == NULL);
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for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {
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rtm = (struct rt_msghdr *)(void *)next;
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if (rtm->rtm_version != RTM_VERSION)
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continue;
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switch (rtm->rtm_type) {
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case GIM_RTM_ADDR:
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ifmam = (struct ifma_msghdr2 *)(void *)rtm;
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if ((ifmam->ifmam_addrs & RTA_IFA) == 0)
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break;
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icnt++;
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p = (char *)(ifmam + 1);
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for (i = 0; i < RTAX_MAX; i++) {
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if ((RTA_MASKS & ifmam->ifmam_addrs &
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(1 << i)) == 0)
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continue;
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sa = (struct sockaddr *)(void *)p;
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len = SA_RLEN(sa);
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dcnt += len;
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p += len;
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}
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break;
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}
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}
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data = (char *)malloc(sizeof(struct _intl_ifmaddrs) * icnt + dcnt);
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if (data == NULL) {
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free(buf);
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return (-1);
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}
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ifa = (struct _intl_ifmaddrs *)(void *)data;
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data += sizeof(struct _intl_ifmaddrs) * icnt;
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memset(ifa, 0, sizeof(struct _intl_ifmaddrs) * icnt);
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ift = ifa;
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for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {
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rtm = (struct rt_msghdr *)(void *)next;
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if (rtm->rtm_version != RTM_VERSION)
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continue;
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switch (rtm->rtm_type) {
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case GIM_RTM_ADDR:
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ifmam = (struct ifma_msghdr2 *)(void *)rtm;
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if ((ifmam->ifmam_addrs & RTA_IFA) == 0)
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break;
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p = (char *)(ifmam + 1);
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for (i = 0; i < RTAX_MAX; i++) {
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if ((RTA_MASKS & ifmam->ifmam_addrs &
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(1 << i)) == 0)
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continue;
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sa = (struct sockaddr *)(void *)p;
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len = SA_RLEN(sa);
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switch (i) {
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case RTAX_GATEWAY:
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ift->ifma_lladdr =
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(struct sockaddr *)(void *)data;
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memcpy(data, p, len);
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data += len;
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break;
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case RTAX_IFP:
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ift->ifma_name =
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(struct sockaddr *)(void *)data;
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memcpy(data, p, len);
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data += len;
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break;
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case RTAX_IFA:
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ift->ifma_addr =
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(struct sockaddr *)(void *)data;
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memcpy(data, p, len);
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data += len;
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break;
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default:
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data += len;
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break;
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}
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p += len;
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}
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ift->ifma_next = ift + 1;
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ift = ift->ifma_next;
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break;
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}
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}
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free(buf);
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if (ift > ifa) {
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ift--;
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ift->ifma_next = NULL;
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*pif = ifa;
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} else {
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*pif = NULL;
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free(ifa);
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}
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return (0);
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}
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static inline void _intl_freeifmaddrs(struct _intl_ifmaddrs *ifmp)
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{
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free(ifmp);
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}
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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#include <string>
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#include <map>
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#include <set>
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#include <algorithm>
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#include "../node/Constants.hpp"
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#include "../node/Utils.hpp"
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#include "../node/Mutex.hpp"
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#include "../node/Dictionary.hpp"
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#include "Arp.hpp"
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#include "OSUtils.hpp"
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#include "OSXEthernetTap.hpp"
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// ff:ff:ff:ff:ff:ff with no ADI
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static const ZeroTier::MulticastGroup _blindWildcardMulticastGroup(ZeroTier::MAC(0xff),0);
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static inline bool _setIpv6Stuff(const char *ifname,bool performNUD,bool acceptRouterAdverts)
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{
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struct in6_ndireq nd;
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struct in6_ifreq ifr;
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int s = socket(AF_INET6,SOCK_DGRAM,0);
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if (s <= 0)
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return false;
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memset(&nd,0,sizeof(nd));
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strncpy(nd.ifname,ifname,sizeof(nd.ifname));
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if (ioctl(s,SIOCGIFINFO_IN6,&nd)) {
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close(s);
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return false;
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}
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unsigned long oldFlags = (unsigned long)nd.ndi.flags;
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if (performNUD)
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nd.ndi.flags |= ND6_IFF_PERFORMNUD;
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else nd.ndi.flags &= ~ND6_IFF_PERFORMNUD;
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if (oldFlags != (unsigned long)nd.ndi.flags) {
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if (ioctl(s,SIOCSIFINFO_FLAGS,&nd)) {
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close(s);
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return false;
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}
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}
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memset(&ifr,0,sizeof(ifr));
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strncpy(ifr.ifr_name,ifname,sizeof(ifr.ifr_name));
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if (ioctl(s,acceptRouterAdverts ? SIOCAUTOCONF_START : SIOCAUTOCONF_STOP,&ifr)) {
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close(s);
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return false;
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}
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close(s);
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return true;
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}
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// Create an OSX-native utun device (utun# where # is desiredNumber)
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// Adapted from public domain utun example code by Jonathan Levin
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static int _make_utun(int desiredNumber)
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{
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struct sockaddr_ctl sc;
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struct ctl_info ctlInfo;
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struct ifreq ifr;
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memset(&ctlInfo, 0, sizeof(ctlInfo));
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if (strlcpy(ctlInfo.ctl_name, UTUN_CONTROL_NAME, sizeof(ctlInfo.ctl_name)) >= sizeof(ctlInfo.ctl_name)) {
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return -1;
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}
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int fd = socket(PF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL);
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if (fd == -1)
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return -1;
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if (ioctl(fd, CTLIOCGINFO, &ctlInfo) == -1) {
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close(fd);
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return -1;
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}
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sc.sc_id = ctlInfo.ctl_id;
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sc.sc_len = sizeof(sc);
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sc.sc_family = AF_SYSTEM;
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sc.ss_sysaddr = AF_SYS_CONTROL;
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sc.sc_unit = desiredNumber + 1;
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if (connect(fd, (struct sockaddr *)&sc, sizeof(sc)) == -1) {
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close(fd);
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return -1;
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}
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memset(&ifr,0,sizeof(ifr));
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sprintf(ifr.ifr_name,"utun%d",desiredNumber);
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if (ioctl(fd,SIOCGIFFLAGS,(void *)&ifr) < 0) {
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printf("SIOCGIFFLAGS failed\n");
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}
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ifr.ifr_flags &= ~IFF_POINTOPOINT;
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if (ioctl(fd,SIOCSIFFLAGS,(void *)&ifr) < 0) {
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printf("clear IFF_POINTOPOINT failed\n");
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}
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return fd;
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}
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namespace ZeroTier {
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static long globalTapsRunning = 0;
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static Mutex globalTapCreateLock;
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OSXEthernetTap::OSXEthernetTap(
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const char *homePath,
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const MAC &mac,
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unsigned int mtu,
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unsigned int metric,
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uint64_t nwid,
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const char *friendlyName,
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void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *data,unsigned int len),
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void *arg) :
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_handler(handler),
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_arg(arg),
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_arp((Arp *)0),
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_nwid(nwid),
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_homePath(homePath),
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_mtu(mtu),
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_metric(metric),
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_fd(0),
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_utun(false),
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_enabled(true)
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{
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char devpath[64],ethaddr[64],mtustr[32],metstr[32],nwids[32];
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struct stat stattmp;
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Utils::snprintf(nwids,sizeof(nwids),"%.16llx",nwid);
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if (mtu > 2800)
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throw std::runtime_error("max tap MTU is 2800");
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Mutex::Lock _gl(globalTapCreateLock);
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// Read remembered previous device name, if any -- we'll try to reuse
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Dictionary devmap;
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std::string desiredDevice;
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{
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std::string devmapbuf;
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if (OSUtils::readFile((_homePath + ZT_PATH_SEPARATOR_S + "devicemap").c_str(),devmapbuf)) {
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devmap.fromString(devmapbuf);
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desiredDevice = devmap.get(nwids,"");
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}
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}
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if (::stat((_homePath + ZT_PATH_SEPARATOR_S + "tap.kext").c_str(),&stattmp) == 0) {
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// Try to init kext if it's there, otherwise revert to utun mode
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if (::stat("/dev/zt0",&stattmp)) {
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long kextpid = (long)vfork();
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if (kextpid == 0) {
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::chdir(homePath);
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OSUtils::redirectUnixOutputs("/dev/null",(const char *)0);
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::execl("/sbin/kextload","/sbin/kextload","-q","-repository",homePath,"tap.kext",(const char *)0);
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::_exit(-1);
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} else if (kextpid > 0) {
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int exitcode = -1;
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::waitpid(kextpid,&exitcode,0);
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}
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::usleep(500); // give tap device driver time to start up and try again
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if (::stat("/dev/zt0",&stattmp))
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_utun = true;
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}
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if (!_utun) {
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// See if we can re-use the last device we had.
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bool recalledDevice = false;
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if (desiredDevice.length() > 2) {
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Utils::snprintf(devpath,sizeof(devpath),"/dev/%s",desiredDevice.c_str());
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if (stat(devpath,&stattmp) == 0) {
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_fd = ::open(devpath,O_RDWR);
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if (_fd > 0) {
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_dev = desiredDevice;
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recalledDevice = true;
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}
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||||
}
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}
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// Open the first unused tap device if we didn't recall a previous one.
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if (!recalledDevice) {
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for(int i=0;i<64;++i) {
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Utils::snprintf(devpath,sizeof(devpath),"/dev/zt%d",i);
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if (stat(devpath,&stattmp)) {
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||||
_utun = true;
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break;
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||||
}
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_fd = ::open(devpath,O_RDWR);
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if (_fd > 0) {
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char foo[16];
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Utils::snprintf(foo,sizeof(foo),"zt%d",i);
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_dev = foo;
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break;
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}
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}
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}
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if (_fd <= 0)
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_utun = true;
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}
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||||
} else {
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_utun = true;
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||||
}
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|
||||
if (_utun) {
|
||||
// Use OSX built-in utun device if kext is not available or doesn't work
|
||||
|
||||
int utunNo = 0;
|
||||
|
||||
if ((desiredDevice.length() > 4)&&(desiredDevice.substr(0,4) == "utun")) {
|
||||
utunNo = Utils::strToInt(desiredDevice.substr(4).c_str());
|
||||
if (utunNo >= 0)
|
||||
_fd = _make_utun(utunNo);
|
||||
}
|
||||
|
||||
if (_fd <= 0) {
|
||||
// Start at utun8 to leave lower utuns unused since other stuff might
|
||||
// want them -- OpenVPN, cjdns, etc. I'm not sure if those are smart
|
||||
// enough to scan upward like this.
|
||||
for(utunNo=8;utunNo<=256;++utunNo) {
|
||||
if ((_fd = _make_utun(utunNo)) > 0)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (_fd <= 0)
|
||||
throw std::runtime_error("unable to find/load ZeroTier tap driver OR use built-in utun driver in OSX; permission or system problem or too many open devices?");
|
||||
|
||||
Utils::snprintf(devpath,sizeof(devpath),"utun%d",utunNo);
|
||||
_dev = devpath;
|
||||
|
||||
// Configure address and bring it up
|
||||
Utils::snprintf(mtustr,sizeof(mtustr),"%u",_mtu);
|
||||
Utils::snprintf(metstr,sizeof(metstr),"%u",_metric);
|
||||
long cpid = (long)vfork();
|
||||
if (cpid == 0) {
|
||||
::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"mtu",mtustr,"metric",metstr,"up",(const char *)0);
|
||||
::_exit(-1);
|
||||
} else if (cpid > 0) {
|
||||
int exitcode = -1;
|
||||
::waitpid(cpid,&exitcode,0);
|
||||
if (exitcode) {
|
||||
::close(_fd);
|
||||
throw std::runtime_error("ifconfig failure activating utun interface");
|
||||
}
|
||||
}
|
||||
|
||||
} else {
|
||||
// Use our ZeroTier OSX tun/tap driver for zt# Ethernet tap device
|
||||
|
||||
if (fcntl(_fd,F_SETFL,fcntl(_fd,F_GETFL) & ~O_NONBLOCK) == -1) {
|
||||
::close(_fd);
|
||||
throw std::runtime_error("unable to set flags on file descriptor for TAP device");
|
||||
}
|
||||
|
||||
// Configure MAC address and MTU, bring interface up
|
||||
Utils::snprintf(ethaddr,sizeof(ethaddr),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(int)mac[0],(int)mac[1],(int)mac[2],(int)mac[3],(int)mac[4],(int)mac[5]);
|
||||
Utils::snprintf(mtustr,sizeof(mtustr),"%u",_mtu);
|
||||
Utils::snprintf(metstr,sizeof(metstr),"%u",_metric);
|
||||
long cpid = (long)vfork();
|
||||
if (cpid == 0) {
|
||||
::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"lladdr",ethaddr,"mtu",mtustr,"metric",metstr,"up",(const char *)0);
|
||||
::_exit(-1);
|
||||
} else if (cpid > 0) {
|
||||
int exitcode = -1;
|
||||
::waitpid(cpid,&exitcode,0);
|
||||
if (exitcode) {
|
||||
::close(_fd);
|
||||
throw std::runtime_error("ifconfig failure setting link-layer address and activating tap interface");
|
||||
}
|
||||
}
|
||||
|
||||
_setIpv6Stuff(_dev.c_str(),true,false);
|
||||
}
|
||||
|
||||
// Set close-on-exec so that devices cannot persist if we fork/exec for update
|
||||
fcntl(_fd,F_SETFD,fcntl(_fd,F_GETFD) | FD_CLOEXEC);
|
||||
|
||||
::pipe(_shutdownSignalPipe);
|
||||
|
||||
++globalTapsRunning;
|
||||
|
||||
devmap[nwids] = _dev;
|
||||
OSUtils::writeFile((_homePath + ZT_PATH_SEPARATOR_S + "devicemap").c_str(),devmap.toString());
|
||||
|
||||
_thread = Thread::start(this);
|
||||
}
|
||||
|
||||
OSXEthernetTap::~OSXEthernetTap()
|
||||
{
|
||||
Mutex::Lock _gl(globalTapCreateLock);
|
||||
|
||||
::write(_shutdownSignalPipe[1],(const void *)this,1); // writing a byte causes thread to exit
|
||||
Thread::join(_thread);
|
||||
|
||||
::close(_fd);
|
||||
::close(_shutdownSignalPipe[0]);
|
||||
::close(_shutdownSignalPipe[1]);
|
||||
|
||||
if (_utun) {
|
||||
delete _arp;
|
||||
} else {
|
||||
if (--globalTapsRunning <= 0) {
|
||||
globalTapsRunning = 0; // sanity check -- should not be possible
|
||||
|
||||
char tmp[16384];
|
||||
sprintf(tmp,"%s/%s",_homePath.c_str(),"tap.kext");
|
||||
long kextpid = (long)vfork();
|
||||
if (kextpid == 0) {
|
||||
OSUtils::redirectUnixOutputs("/dev/null",(const char *)0);
|
||||
::execl("/sbin/kextunload","/sbin/kextunload",tmp,(const char *)0);
|
||||
::_exit(-1);
|
||||
} else if (kextpid > 0) {
|
||||
int exitcode = -1;
|
||||
::waitpid(kextpid,&exitcode,0);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void OSXEthernetTap::setEnabled(bool en)
|
||||
{
|
||||
_enabled = en;
|
||||
// TODO: interface status change
|
||||
}
|
||||
|
||||
bool OSXEthernetTap::enabled() const
|
||||
{
|
||||
return _enabled;
|
||||
}
|
||||
|
||||
static bool ___removeIp(const std::string &_dev,const InetAddress &ip)
|
||||
{
|
||||
long cpid = (long)vfork();
|
||||
if (cpid == 0) {
|
||||
execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"inet",ip.toIpString().c_str(),"-alias",(const char *)0);
|
||||
_exit(-1);
|
||||
} else if (cpid > 0) {
|
||||
int exitcode = -1;
|
||||
waitpid(cpid,&exitcode,0);
|
||||
return (exitcode == 0);
|
||||
}
|
||||
return false; // never reached, make compiler shut up about return value
|
||||
}
|
||||
|
||||
bool OSXEthernetTap::addIp(const InetAddress &ip)
|
||||
{
|
||||
if (!ip)
|
||||
return false;
|
||||
|
||||
std::vector<InetAddress> allIps(ips());
|
||||
if (std::binary_search(allIps.begin(),allIps.end(),ip))
|
||||
return true;
|
||||
|
||||
// Remove and reconfigure if address is the same but netmask is different
|
||||
for(std::vector<InetAddress>::iterator i(allIps.begin());i!=allIps.end();++i) {
|
||||
if ((i->ipsEqual(ip))&&(i->netmaskBits() != ip.netmaskBits())) {
|
||||
if (___removeIp(_dev,*i))
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (_utun) {
|
||||
long cpid = (long)vfork();
|
||||
if (cpid == 0) {
|
||||
if (ip.ss_family == AF_INET6) {
|
||||
::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"inet6",ip.toString().c_str(),"alias",(const char *)0);
|
||||
} else {
|
||||
::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),ip.toString().c_str(),ip.toIpString().c_str(),"alias",(const char *)0);
|
||||
}
|
||||
::_exit(-1);
|
||||
} else if (cpid > 0) {
|
||||
int exitcode = -1;
|
||||
::waitpid(cpid,&exitcode,0);
|
||||
|
||||
if (exitcode == 0) {
|
||||
if (ip.ss_family == AF_INET) {
|
||||
// Add route to network over tun for IPv4 -- otherwise it behaves
|
||||
// as a simple point to point tunnel instead of a true route.
|
||||
cpid = (long)vfork();
|
||||
if (cpid == 0) {
|
||||
::close(STDERR_FILENO);
|
||||
::close(STDOUT_FILENO);
|
||||
::execl("/sbin/route","/sbin/route","add",ip.network().toString().c_str(),ip.toIpString().c_str(),(const char *)0);
|
||||
::exit(-1);
|
||||
} else if (cpid > 0) {
|
||||
int exitcode = -1;
|
||||
::waitpid(cpid,&exitcode,0);
|
||||
return (exitcode == 0);
|
||||
}
|
||||
} else return true;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
long cpid = (long)vfork();
|
||||
if (cpid == 0) {
|
||||
::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),ip.isV4() ? "inet" : "inet6",ip.toString().c_str(),"alias",(const char *)0);
|
||||
::_exit(-1);
|
||||
} else if (cpid > 0) {
|
||||
int exitcode = -1;
|
||||
::waitpid(cpid,&exitcode,0);
|
||||
return (exitcode == 0);
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
bool OSXEthernetTap::removeIp(const InetAddress &ip)
|
||||
{
|
||||
if (!ip)
|
||||
return true;
|
||||
std::vector<InetAddress> allIps(ips());
|
||||
if (!std::binary_search(allIps.begin(),allIps.end(),ip)) {
|
||||
if (___removeIp(_dev,ip))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
std::vector<InetAddress> OSXEthernetTap::ips() const
|
||||
{
|
||||
struct ifaddrs *ifa = (struct ifaddrs *)0;
|
||||
if (getifaddrs(&ifa))
|
||||
return std::vector<InetAddress>();
|
||||
|
||||
std::vector<InetAddress> r;
|
||||
|
||||
struct ifaddrs *p = ifa;
|
||||
while (p) {
|
||||
if ((!strcmp(p->ifa_name,_dev.c_str()))&&(p->ifa_addr)&&(p->ifa_netmask)&&(p->ifa_addr->sa_family == p->ifa_netmask->sa_family)) {
|
||||
switch(p->ifa_addr->sa_family) {
|
||||
case AF_INET: {
|
||||
struct sockaddr_in *sin = (struct sockaddr_in *)p->ifa_addr;
|
||||
struct sockaddr_in *nm = (struct sockaddr_in *)p->ifa_netmask;
|
||||
r.push_back(InetAddress(&(sin->sin_addr.s_addr),4,Utils::countBits((uint32_t)nm->sin_addr.s_addr)));
|
||||
} break;
|
||||
case AF_INET6: {
|
||||
struct sockaddr_in6 *sin = (struct sockaddr_in6 *)p->ifa_addr;
|
||||
struct sockaddr_in6 *nm = (struct sockaddr_in6 *)p->ifa_netmask;
|
||||
uint32_t b[4];
|
||||
memcpy(b,nm->sin6_addr.s6_addr,sizeof(b));
|
||||
r.push_back(InetAddress(sin->sin6_addr.s6_addr,16,Utils::countBits(b[0]) + Utils::countBits(b[1]) + Utils::countBits(b[2]) + Utils::countBits(b[3])));
|
||||
} break;
|
||||
}
|
||||
}
|
||||
p = p->ifa_next;
|
||||
}
|
||||
|
||||
if (ifa)
|
||||
freeifaddrs(ifa);
|
||||
|
||||
std::sort(r.begin(),r.end());
|
||||
std::unique(r.begin(),r.end());
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
void OSXEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
|
||||
{
|
||||
char putBuf[4096];
|
||||
if ((_fd > 0)&&(len <= _mtu)&&(_enabled)) {
|
||||
to.copyTo(putBuf,6);
|
||||
from.copyTo(putBuf + 6,6);
|
||||
*((uint16_t *)(putBuf + 12)) = htons((uint16_t)etherType);
|
||||
memcpy(putBuf + 14,data,len);
|
||||
len += 14;
|
||||
::write(_fd,putBuf,len);
|
||||
}
|
||||
}
|
||||
|
||||
std::string OSXEthernetTap::deviceName() const
|
||||
{
|
||||
return _dev;
|
||||
}
|
||||
|
||||
void OSXEthernetTap::setFriendlyName(const char *friendlyName)
|
||||
{
|
||||
}
|
||||
|
||||
void OSXEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed)
|
||||
{
|
||||
std::vector<MulticastGroup> newGroups;
|
||||
|
||||
struct _intl_ifmaddrs *ifmap = (struct _intl_ifmaddrs *)0;
|
||||
if (!_intl_getifmaddrs(&ifmap)) {
|
||||
struct _intl_ifmaddrs *p = ifmap;
|
||||
while (p) {
|
||||
if (p->ifma_addr->sa_family == AF_LINK) {
|
||||
struct sockaddr_dl *in = (struct sockaddr_dl *)p->ifma_name;
|
||||
struct sockaddr_dl *la = (struct sockaddr_dl *)p->ifma_addr;
|
||||
if ((la->sdl_alen == 6)&&(in->sdl_nlen <= _dev.length())&&(!memcmp(_dev.data(),in->sdl_data,in->sdl_nlen)))
|
||||
newGroups.push_back(MulticastGroup(MAC(la->sdl_data + la->sdl_nlen,6),0));
|
||||
}
|
||||
p = p->ifma_next;
|
||||
}
|
||||
_intl_freeifmaddrs(ifmap);
|
||||
}
|
||||
|
||||
std::vector<InetAddress> allIps(ips());
|
||||
for(std::vector<InetAddress>::iterator ip(allIps.begin());ip!=allIps.end();++ip)
|
||||
newGroups.push_back(MulticastGroup::deriveMulticastGroupForAddressResolution(*ip));
|
||||
|
||||
std::sort(newGroups.begin(),newGroups.end());
|
||||
std::unique(newGroups.begin(),newGroups.end());
|
||||
|
||||
for(std::vector<MulticastGroup>::iterator m(newGroups.begin());m!=newGroups.end();++m) {
|
||||
if (!std::binary_search(_multicastGroups.begin(),_multicastGroups.end(),*m))
|
||||
added.push_back(*m);
|
||||
}
|
||||
for(std::vector<MulticastGroup>::iterator m(_multicastGroups.begin());m!=_multicastGroups.end();++m) {
|
||||
if (!std::binary_search(newGroups.begin(),newGroups.end(),*m))
|
||||
removed.push_back(*m);
|
||||
}
|
||||
|
||||
_multicastGroups.swap(newGroups);
|
||||
}
|
||||
|
||||
void OSXEthernetTap::threadMain()
|
||||
throw()
|
||||
{
|
||||
fd_set readfds,nullfds;
|
||||
MAC to,from;
|
||||
int n,nfds,r;
|
||||
char getBuf[8194];
|
||||
|
||||
Thread::sleep(500);
|
||||
|
||||
FD_ZERO(&readfds);
|
||||
FD_ZERO(&nullfds);
|
||||
nfds = (int)std::max(_shutdownSignalPipe[0],_fd) + 1;
|
||||
|
||||
r = 0;
|
||||
for(;;) {
|
||||
FD_SET(_shutdownSignalPipe[0],&readfds);
|
||||
FD_SET(_fd,&readfds);
|
||||
select(nfds,&readfds,&nullfds,&nullfds,(struct timeval *)0);
|
||||
|
||||
if (FD_ISSET(_shutdownSignalPipe[0],&readfds)) // writes to shutdown pipe terminate thread
|
||||
break;
|
||||
|
||||
if (FD_ISSET(_fd,&readfds)) {
|
||||
n = (int)::read(_fd,getBuf + r,sizeof(getBuf) - r);
|
||||
if (n < 0) {
|
||||
if ((errno != EINTR)&&(errno != ETIMEDOUT))
|
||||
break;
|
||||
} else {
|
||||
// Some tap drivers like to send the ethernet frame and the
|
||||
// payload in two chunks, so handle that by accumulating
|
||||
// data until we have at least a frame.
|
||||
r += n;
|
||||
if (r > 14) {
|
||||
if (r > ((int)_mtu + 14)) // sanity check for weird TAP behavior on some platforms
|
||||
r = _mtu + 14;
|
||||
|
||||
if (_enabled) {
|
||||
to.setTo(getBuf,6);
|
||||
from.setTo(getBuf + 6,6);
|
||||
unsigned int etherType = ntohs(((const uint16_t *)getBuf)[6]);
|
||||
// TODO: VLAN support
|
||||
_handler(_arg,_nwid,from,to,etherType,0,(const void *)(getBuf + 14),r - 14);
|
||||
}
|
||||
|
||||
r = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace ZeroTier
|
||||
101
attic/OSXEthernetTap.hpp.utun-work-in-progress
Normal file
101
attic/OSXEthernetTap.hpp.utun-work-in-progress
Normal file
@ -0,0 +1,101 @@
|
||||
/*
|
||||
* ZeroTier One - Network Virtualization Everywhere
|
||||
* Copyright (C) 2011-2015 ZeroTier, Inc.
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* --
|
||||
*
|
||||
* ZeroTier may be used and distributed under the terms of the GPLv3, which
|
||||
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
|
||||
*
|
||||
* If you would like to embed ZeroTier into a commercial application or
|
||||
* redistribute it in a modified binary form, please contact ZeroTier Networks
|
||||
* LLC. Start here: http://www.zerotier.com/
|
||||
*/
|
||||
|
||||
#ifndef ZT_OSXETHERNETTAP_HPP
|
||||
#define ZT_OSXETHERNETTAP_HPP
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include <stdexcept>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
#include "../node/Constants.hpp"
|
||||
#include "../node/MAC.hpp"
|
||||
#include "../node/InetAddress.hpp"
|
||||
#include "../node/MulticastGroup.hpp"
|
||||
|
||||
#include "Thread.hpp"
|
||||
|
||||
namespace ZeroTier {
|
||||
|
||||
class Arp;
|
||||
|
||||
/**
|
||||
* OSX Ethernet tap supporting either ZeroTier tun/tap kext or OSX-native utun
|
||||
*/
|
||||
class OSXEthernetTap
|
||||
{
|
||||
public:
|
||||
OSXEthernetTap(
|
||||
const char *homePath,
|
||||
const MAC &mac,
|
||||
unsigned int mtu,
|
||||
unsigned int metric,
|
||||
uint64_t nwid,
|
||||
const char *friendlyName,
|
||||
void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
|
||||
void *arg);
|
||||
|
||||
~OSXEthernetTap();
|
||||
|
||||
void setEnabled(bool en);
|
||||
bool enabled() const;
|
||||
bool addIp(const InetAddress &ip);
|
||||
bool removeIp(const InetAddress &ip);
|
||||
std::vector<InetAddress> ips() const;
|
||||
void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
|
||||
std::string deviceName() const;
|
||||
void setFriendlyName(const char *friendlyName);
|
||||
void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
|
||||
|
||||
inline bool isNativeUtun() const { return _utun; }
|
||||
|
||||
void threadMain()
|
||||
throw();
|
||||
|
||||
private:
|
||||
void (*_handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int);
|
||||
void *_arg;
|
||||
Arp *_arp; // created and used if utun is enabled
|
||||
uint64_t _nwid;
|
||||
Thread _thread;
|
||||
std::string _homePath;
|
||||
std::string _dev;
|
||||
std::vector<MulticastGroup> _multicastGroups;
|
||||
unsigned int _mtu;
|
||||
unsigned int _metric;
|
||||
int _fd;
|
||||
int _shutdownSignalPipe[2];
|
||||
bool _utun;
|
||||
volatile bool _enabled;
|
||||
};
|
||||
|
||||
} // namespace ZeroTier
|
||||
|
||||
#endif
|
||||
@ -234,7 +234,6 @@ void InetAddress::fromString(const std::string &ipSlashPort)
|
||||
}
|
||||
|
||||
InetAddress InetAddress::netmask() const
|
||||
throw()
|
||||
{
|
||||
InetAddress r(*this);
|
||||
switch(r.ss_family) {
|
||||
@ -242,36 +241,40 @@ InetAddress InetAddress::netmask() const
|
||||
reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr = Utils::hton((uint32_t)(0xffffffff << (32 - netmaskBits())));
|
||||
break;
|
||||
case AF_INET6: {
|
||||
unsigned char *bf = reinterpret_cast<unsigned char *>(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr);
|
||||
signed int bitsLeft = (signed int)netmaskBits();
|
||||
for(unsigned int i=0;i<16;++i) {
|
||||
if (bitsLeft > 0) {
|
||||
bf[i] |= (unsigned char)((bitsLeft >= 8) ? 0x00 : (0xff >> bitsLeft));
|
||||
bitsLeft -= 8;
|
||||
}
|
||||
}
|
||||
uint64_t nm[2];
|
||||
const unsigned int bits = netmaskBits();
|
||||
nm[0] = Utils::hton((uint64_t)((bits >= 64) ? 0xffffffffffffffffULL : (0xffffffffffffffffULL << (64 - bits))));
|
||||
nm[1] = Utils::hton((uint64_t)((bits <= 64) ? 0ULL : (0xffffffffffffffffULL << (128 - bits))));
|
||||
memcpy(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr,nm,16);
|
||||
} break;
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
InetAddress InetAddress::broadcast() const
|
||||
throw()
|
||||
{
|
||||
if (ss_family == AF_INET) {
|
||||
InetAddress r(*this);
|
||||
reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr |= Utils::hton((uint32_t)(0xffffffff >> netmaskBits()));
|
||||
return r;
|
||||
}
|
||||
return InetAddress();
|
||||
}
|
||||
|
||||
InetAddress InetAddress::network() const
|
||||
{
|
||||
InetAddress r(*this);
|
||||
switch(r.ss_family) {
|
||||
case AF_INET:
|
||||
reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr |= Utils::hton((uint32_t)(0xffffffff >> netmaskBits()));
|
||||
reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr &= Utils::hton((uint32_t)(0xffffffff << (32 - netmaskBits())));
|
||||
break;
|
||||
case AF_INET6: {
|
||||
unsigned char *bf = reinterpret_cast<unsigned char *>(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr);
|
||||
signed int bitsLeft = (signed int)netmaskBits();
|
||||
for(unsigned int i=0;i<16;++i) {
|
||||
if (bitsLeft > 0) {
|
||||
bf[i] |= (unsigned char)((bitsLeft >= 8) ? 0x00 : (0xff >> bitsLeft));
|
||||
bitsLeft -= 8;
|
||||
}
|
||||
}
|
||||
uint64_t nm[2];
|
||||
const unsigned int bits = netmaskBits();
|
||||
memcpy(nm,reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr,16);
|
||||
nm[0] &= Utils::hton((uint64_t)((bits >= 64) ? 0xffffffffffffffffULL : (0xffffffffffffffffULL << (64 - bits))));
|
||||
nm[1] &= Utils::hton((uint64_t)((bits <= 64) ? 0ULL : (0xffffffffffffffffULL << (128 - bits))));
|
||||
memcpy(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr,nm,16);
|
||||
} break;
|
||||
}
|
||||
return r;
|
||||
|
||||
@ -303,17 +303,27 @@ struct InetAddress : public sockaddr_storage
|
||||
|
||||
/**
|
||||
* Construct a full netmask as an InetAddress
|
||||
*
|
||||
* @return Netmask such as 255.255.255.0 if this address is /24 (port field will be unchanged)
|
||||
*/
|
||||
InetAddress netmask() const
|
||||
throw();
|
||||
InetAddress netmask() const;
|
||||
|
||||
/**
|
||||
* Constructs a broadcast address from a network/netmask address
|
||||
*
|
||||
* This is only valid for IPv4 and will return a NULL InetAddress for other
|
||||
* address families.
|
||||
*
|
||||
* @return Broadcast address (only IP portion is meaningful)
|
||||
*/
|
||||
InetAddress broadcast() const
|
||||
throw();
|
||||
InetAddress broadcast() const;
|
||||
|
||||
/**
|
||||
* Return the network -- a.k.a. the IP ANDed with the netmask
|
||||
*
|
||||
* @return Network e.g. 10.0.1.0/24 from 10.0.1.200/24
|
||||
*/
|
||||
InetAddress network() const;
|
||||
|
||||
/**
|
||||
* @return True if this is an IPv4 address
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user