#include "tunemu.h"
#endif
+#ifdef HAVE_NET_IF_UTUN_H
+#include <sys/sys_domain.h>
+#include <sys/kern_control.h>
+#include <net/if_utun.h>
+#endif
+
#define DEFAULT_TUN_DEVICE "/dev/tun0"
-#if defined(HAVE_FREEBSD) || defined(HAVE_NETBSD) || defined(HAVE_DARWIN)
#define DEFAULT_TAP_DEVICE "/dev/tap0"
-#else
-#define DEFAULT_TAP_DEVICE "/dev/tun0"
-#endif
typedef enum device_type {
DEVICE_TYPE_TUN,
#ifdef ENABLE_TUNEMU
DEVICE_TYPE_TUNEMU,
#endif
+ DEVICE_TYPE_UTUN,
} device_type_t;
int device_fd = -1;
char *device = NULL;
char *iface = NULL;
-static char *device_info = NULL;
+static const char *device_info = "OS X utun device";
static uint64_t device_total_in = 0;
static uint64_t device_total_out = 0;
#if defined(ENABLE_TUNEMU)
static device_type_t device_type = DEVICE_TYPE_TUN;
#endif
+#ifdef HAVE_NET_IF_UTUN_H
+static bool setup_utun(void) {
+ device_fd = socket(PF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL);
+
+ if(device_fd == -1) {
+ logger(LOG_ERR, "Could not open PF_SYSTEM socket: %s\n", strerror(errno));
+ return false;
+ }
+
+ struct ctl_info info = {};
+
+ strlcpy(info.ctl_name, UTUN_CONTROL_NAME, sizeof(info.ctl_name));
+
+ if(ioctl(device_fd, CTLIOCGINFO, &info) == -1) {
+ logger(LOG_ERR, "ioctl(CTLIOCGINFO) failed: %s", strerror(errno));
+ return false;
+ }
+
+ int unit = -1;
+ char *p = strstr(device, "utun"), *e = NULL;
+
+ if(p) {
+ unit = strtol(p + 4, &e, 10);
+
+ if(!e) {
+ unit = -1;
+ }
+ }
+
+ struct sockaddr_ctl sc = {
+ .sc_id = info.ctl_id,
+ .sc_len = sizeof(sc),
+ .sc_family = AF_SYSTEM,
+ .ss_sysaddr = AF_SYS_CONTROL,
+ .sc_unit = unit + 1,
+ };
+
+ if(connect(device_fd, (struct sockaddr *)&sc, sizeof(sc)) == -1) {
+ logger(LOG_ERR, "Could not connect utun socket: %s\n", strerror(errno));
+ return false;
+ }
+
+ char name[64] = "";
+ socklen_t len = sizeof(name);
+
+ if(getsockopt(device_fd, SYSPROTO_CONTROL, UTUN_OPT_IFNAME, name, &len)) {
+ iface = xstrdup(device);
+ } else {
+ iface = xstrdup(name);
+ }
+
+ logger(LOG_INFO, "%s is a %s", device, device_info);
+
+ return true;
+}
+#endif
+
static bool setup_device(void) {
- char *type;
+ // Find out which device file to open
if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
- if(routing_mode == RMODE_ROUTER)
+ if(routing_mode == RMODE_ROUTER) {
device = xstrdup(DEFAULT_TUN_DEVICE);
- else
+ } else {
device = xstrdup(DEFAULT_TAP_DEVICE);
+ }
}
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
- iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device);
- else if(strcmp(iface, strrchr(device, '/') ? strrchr(device, '/') + 1 : device))
- logger(LOG_WARNING, "Warning: Interface does not match Device. $INTERFACE might be set incorrectly.");
+ // Find out if it's supposed to be a tun or a tap device
+
+ char *type;
if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
if(!strcasecmp(type, "tun"))
- /* use default */;
+ /* use default */;
+
#ifdef ENABLE_TUNEMU
- else if(!strcasecmp(type, "tunemu"))
+ else if(!strcasecmp(type, "tunemu")) {
device_type = DEVICE_TYPE_TUNEMU;
+ }
+
+#endif
+#ifdef HAVE_NET_IF_UTUN_H
+ else if(!strcasecmp(type, "utun")) {
+ device_type = DEVICE_TYPE_UTUN;
+ }
+
#endif
- else if(!strcasecmp(type, "tunnohead"))
+ else if(!strcasecmp(type, "tunnohead")) {
device_type = DEVICE_TYPE_TUN;
- else if(!strcasecmp(type, "tunifhead"))
+ } else if(!strcasecmp(type, "tunifhead")) {
device_type = DEVICE_TYPE_TUNIFHEAD;
- else if(!strcasecmp(type, "tap"))
+ } else if(!strcasecmp(type, "tap")) {
device_type = DEVICE_TYPE_TAP;
- else {
+ } else {
logger(LOG_ERR, "Unknown device type %s!", type);
return false;
}
} else {
- if(strstr(device, "tap") || routing_mode != RMODE_ROUTER)
- device_type = DEVICE_TYPE_TAP;
+#ifdef HAVE_NET_IF_UTUN_H
+
+ if(strncmp(device, "utun", 4) == 0 || strncmp(device, "/dev/utun", 9) == 0) {
+ device_type = DEVICE_TYPE_UTUN;
+ } else
+#endif
+ if(strstr(device, "tap") || routing_mode != RMODE_ROUTER) {
+ device_type = DEVICE_TYPE_TAP;
+ }
}
+ if(routing_mode == RMODE_SWITCH && device_type != DEVICE_TYPE_TAP) {
+ logger(LOG_ERR, "Only tap devices support switch mode!");
+ return false;
+ }
+
+ // Open the device
+
switch(device_type) {
#ifdef ENABLE_TUNEMU
- case DEVICE_TYPE_TUNEMU: {
- char dynamic_name[256] = "";
- device_fd = tunemu_open(dynamic_name);
- }
- break;
+
+ case DEVICE_TYPE_TUNEMU: {
+ char dynamic_name[256] = "";
+ device_fd = tunemu_open(dynamic_name);
+ }
+ break;
#endif
- default:
- device_fd = open(device, O_RDWR | O_NONBLOCK);
+#ifdef HAVE_NET_IF_UTUN_H
+
+ case DEVICE_TYPE_UTUN:
+ return setup_utun();
+#endif
+
+ default:
+ device_fd = open(device, O_RDWR | O_NONBLOCK);
}
if(device_fd < 0) {
fcntl(device_fd, F_SETFD, FD_CLOEXEC);
#endif
+ // Guess what the corresponding interface is called
+
+ char *realname = NULL;
+
+#if defined(HAVE_FDEVNAME)
+ realname = fdevname(device_fd);
+#elif defined(HAVE_DEVNAME)
+ struct stat buf;
+
+ if(!fstat(device_fd, &buf)) {
+ realname = devname(buf.st_rdev, S_IFCHR);
+ }
+
+#endif
+
+ if(!realname) {
+ realname = device;
+ }
+
+ if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) {
+ iface = xstrdup(strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname);
+ } else if(strcmp(iface, strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname)) {
+ logger(LOG_WARNING, "Warning: Interface does not match Device. $INTERFACE might be set incorrectly.");
+ }
+
+ // Configure the device as best as we can
+
switch(device_type) {
- default:
- device_type = DEVICE_TYPE_TUN;
- case DEVICE_TYPE_TUN:
+ default:
+ device_type = DEVICE_TYPE_TUN;
+
+ case DEVICE_TYPE_TUN:
#ifdef TUNSIFHEAD
- {
+ {
const int zero = 0;
- if(ioctl(device_fd, TUNSIFHEAD, &zero, sizeof zero) == -1) {
+
+ if(ioctl(device_fd, TUNSIFHEAD, &zero, sizeof(zero)) == -1) {
logger(LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno));
return false;
}
}
+
#endif
#if defined(TUNSIFMODE) && defined(IFF_BROADCAST) && defined(IFF_MULTICAST)
{
const int mode = IFF_BROADCAST | IFF_MULTICAST;
- ioctl(device_fd, TUNSIFMODE, &mode, sizeof mode);
+ ioctl(device_fd, TUNSIFMODE, &mode, sizeof(mode));
}
#endif
- device_info = "Generic BSD tun device";
- break;
- case DEVICE_TYPE_TUNIFHEAD:
+ device_info = "Generic BSD tun device";
+ break;
+
+ case DEVICE_TYPE_TUNIFHEAD:
#ifdef TUNSIFHEAD
{
const int one = 1;
- if(ioctl(device_fd, TUNSIFHEAD, &one, sizeof one) == -1) {
+
+ if(ioctl(device_fd, TUNSIFHEAD, &one, sizeof(one)) == -1) {
logger(LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno));
return false;
}
}
+
#endif
#if defined(TUNSIFMODE) && defined(IFF_BROADCAST) && defined(IFF_MULTICAST)
{
- const int mode = IFF_BROADCAST | IFF_MULTICAST;
- ioctl(device_fd, TUNSIFMODE, &mode, sizeof mode);
+ const int mode = IFF_BROADCAST | IFF_MULTICAST;
+ ioctl(device_fd, TUNSIFMODE, &mode, sizeof(mode));
}
#endif
- device_info = "Generic BSD tun device";
- break;
- case DEVICE_TYPE_TAP:
- if(routing_mode == RMODE_ROUTER)
- overwrite_mac = true;
- device_info = "Generic BSD tap device";
+ device_info = "Generic BSD tun device";
+ break;
+
+ case DEVICE_TYPE_TAP:
+ if(routing_mode == RMODE_ROUTER) {
+ overwrite_mac = true;
+ }
+
+ device_info = "Generic BSD tap device";
#ifdef TAPGIFNAME
- {
- struct ifreq ifr;
- if(ioctl(device_fd, TAPGIFNAME, (void*)&ifr) == 0) {
- if(iface)
- free(iface);
- iface = xstrdup(ifr.ifr_name);
+ {
+ struct ifreq ifr;
+
+ if(ioctl(device_fd, TAPGIFNAME, (void *)&ifr) == 0) {
+ if(iface) {
+ free(iface);
}
+
+ iface = xstrdup(ifr.ifr_name);
}
-
+ }
+
#endif
- break;
+ break;
#ifdef ENABLE_TUNEMU
- case DEVICE_TYPE_TUNEMU:
- device_info = "BSD tunemu device";
- break;
+
+ case DEVICE_TYPE_TUNEMU:
+ device_info = "BSD tunemu device";
+ break;
#endif
}
+#ifdef SIOCGIFADDR
+
+ if(overwrite_mac) {
+ ioctl(device_fd, SIOCGIFADDR, mymac.x);
+ }
+
+#endif
+
logger(LOG_INFO, "%s is a %s", device, device_info);
return true;
static void close_device(void) {
switch(device_type) {
#ifdef ENABLE_TUNEMU
- case DEVICE_TYPE_TUNEMU:
- tunemu_close(device_fd);
- break;
+
+ case DEVICE_TYPE_TUNEMU:
+ tunemu_close(device_fd);
+ break;
#endif
- default:
- close(device_fd);
+
+ default:
+ close(device_fd);
}
free(device);
int lenin;
switch(device_type) {
- case DEVICE_TYPE_TUN:
+ case DEVICE_TYPE_TUN:
#ifdef ENABLE_TUNEMU
- case DEVICE_TYPE_TUNEMU:
- if(device_type == DEVICE_TYPE_TUNEMU)
- lenin = tunemu_read(device_fd, packet->data + 14, MTU - 14);
- else
+ case DEVICE_TYPE_TUNEMU:
+ if(device_type == DEVICE_TYPE_TUNEMU) {
+ lenin = tunemu_read(device_fd, packet->data + 14, MTU - 14);
+ } else
#endif
- lenin = read(device_fd, packet->data + 14, MTU - 14);
-
- if(lenin <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
- return false;
- }
+ lenin = read(device_fd, packet->data + 14, MTU - 14);
- switch(packet->data[14] >> 4) {
- case 4:
- packet->data[12] = 0x08;
- packet->data[13] = 0x00;
- break;
- case 6:
- packet->data[12] = 0x86;
- packet->data[13] = 0xDD;
- break;
- default:
- ifdebug(TRAFFIC) logger(LOG_ERR,
- "Unknown IP version %d while reading packet from %s %s",
- packet->data[14] >> 4, device_info, device);
- return false;
- }
+ if(lenin <= 0) {
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ device, strerror(errno));
+ return false;
+ }
- memset(packet->data, 0, 12);
- packet->len = lenin + 14;
+ switch(packet->data[14] >> 4) {
+ case 4:
+ packet->data[12] = 0x08;
+ packet->data[13] = 0x00;
break;
- case DEVICE_TYPE_TUNIFHEAD: {
- u_int32_t type;
- struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, MTU - 14}};
+ case 6:
+ packet->data[12] = 0x86;
+ packet->data[13] = 0xDD;
+ break;
- if((lenin = readv(device_fd, vector, 2)) <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
- return false;
- }
+ default:
+ ifdebug(TRAFFIC) logger(LOG_ERR,
+ "Unknown IP version %d while reading packet from %s %s",
+ packet->data[14] >> 4, device_info, device);
+ return false;
+ }
- switch (ntohl(type)) {
- case AF_INET:
- packet->data[12] = 0x08;
- packet->data[13] = 0x00;
- break;
-
- case AF_INET6:
- packet->data[12] = 0x86;
- packet->data[13] = 0xDD;
- break;
-
- default:
- ifdebug(TRAFFIC) logger(LOG_ERR,
- "Unknown address family %x while reading packet from %s %s",
- ntohl(type), device_info, device);
- return false;
- }
+ memset(packet->data, 0, 12);
+ packet->len = lenin + 14;
+ break;
- memset(packet->data, 0, 12);
- packet->len = lenin + 10;
- break;
+ case DEVICE_TYPE_UTUN:
+ case DEVICE_TYPE_TUNIFHEAD: {
+ if((lenin = read(device_fd, packet->data + 10, MTU - 10)) <= 0) {
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ device, strerror(errno));
+ return false;
}
- case DEVICE_TYPE_TAP:
- if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
- return false;
- }
+ switch(packet->data[14] >> 4) {
+ case 4:
+ packet->data[12] = 0x08;
+ packet->data[13] = 0x00;
+ break;
- packet->len = lenin;
+ case 6:
+ packet->data[12] = 0x86;
+ packet->data[13] = 0xDD;
break;
default:
+ ifdebug(TRAFFIC) logger(LOG_ERR,
+ "Unknown IP version %d while reading packet from %s %s",
+ packet->data[14] >> 4, device_info, device);
+ return false;
+ }
+
+ memset(packet->data, 0, 12);
+ packet->len = lenin + 10;
+ break;
+ }
+
+ case DEVICE_TYPE_TAP:
+ if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ device, strerror(errno));
return false;
+ }
+
+ packet->len = lenin;
+ break;
+
+ default:
+ return false;
}
-
+
device_total_in += packet->len;
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s",
- packet->len, device_info);
+ packet->len, device_info);
return true;
}
static bool write_packet(vpn_packet_t *packet) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
- packet->len, device_info);
+ packet->len, device_info);
switch(device_type) {
- case DEVICE_TYPE_TUN:
- if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
- logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
- device, strerror(errno));
- return false;
- }
- break;
+ case DEVICE_TYPE_TUN:
+ if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
+ logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
+ device, strerror(errno));
+ return false;
+ }
- case DEVICE_TYPE_TUNIFHEAD: {
- u_int32_t type;
- struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, packet->len - 14}};
- int af;
-
- af = (packet->data[12] << 8) + packet->data[13];
-
- switch (af) {
- case 0x0800:
- type = htonl(AF_INET);
- break;
- case 0x86DD:
- type = htonl(AF_INET6);
- break;
- default:
- ifdebug(TRAFFIC) logger(LOG_ERR,
- "Unknown address family %x while writing packet to %s %s",
- af, device_info, device);
- return false;
- }
+ break;
- if(writev(device_fd, vector, 2) < 0) {
- logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
- strerror(errno));
- return false;
- }
- break;
- }
-
- case DEVICE_TYPE_TAP:
- if(write(device_fd, packet->data, packet->len) < 0) {
- logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
- device, strerror(errno));
- return false;
- }
+ case DEVICE_TYPE_UTUN:
+ case DEVICE_TYPE_TUNIFHEAD: {
+ int af = (packet->data[12] << 8) + packet->data[13];
+ uint32_t type;
+
+ switch(af) {
+ case 0x0800:
+ type = htonl(AF_INET);
break;
-#ifdef ENABLE_TUNEMU
- case DEVICE_TYPE_TUNEMU:
- if(tunemu_write(device_fd, packet->data + 14, packet->len - 14) < 0) {
- logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
- device, strerror(errno));
- return false;
- }
+ case 0x86DD:
+ type = htonl(AF_INET6);
break;
-#endif
default:
+ ifdebug(TRAFFIC) logger(LOG_ERR,
+ "Unknown address family %x while writing packet to %s %s",
+ af, device_info, device);
+ return false;
+ }
+
+ memcpy(packet->data + 10, &type, sizeof(type));
+
+ if(write(device_fd, packet->data + 10, packet->len - 10) < 0) {
+ logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
+ strerror(errno));
return false;
+ }
+
+ break;
+ }
+
+ case DEVICE_TYPE_TAP:
+ if(write(device_fd, packet->data, packet->len) < 0) {
+ logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
+ device, strerror(errno));
+ return false;
+ }
+
+ break;
+
+#ifdef ENABLE_TUNEMU
+
+ case DEVICE_TYPE_TUNEMU:
+ if(tunemu_write(device_fd, packet->data + 14, packet->len - 14) < 0) {
+ logger(LOG_ERR, "Error while writing to %s %s: %s", device_info,
+ device, strerror(errno));
+ return false;
+ }
+
+ break;
+#endif
+
+ default:
+ return false;
}
device_total_out += packet->len;
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