+++ /dev/null
-/*
- device.c -- Interaction with Solaris tun device
- Copyright (C) 2001-2005 Ivo Timmermans,
- 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- 2001-2013 Guus Sliepen <guus@tinc-vpn.org>
-
- 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 2 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, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-
-#include "../system.h"
-
-#include <sys/stropts.h>
-#include <sys/sockio.h>
-
-#include "../conf.h"
-#include "../device.h"
-#include "../logger.h"
-#include "../names.h"
-#include "../net.h"
-#include "../route.h"
-#include "../utils.h"
-#include "../xalloc.h"
-
-#ifndef TUNNEWPPA
-#warning Missing net/if_tun.h, using hardcoded value for TUNNEWPPA
-#define TUNNEWPPA (('T'<<16) | 0x0001)
-#endif
-
-#define DEFAULT_TUN_DEVICE "/dev/tun"
-#define DEFAULT_TAP_DEVICE "/dev/tap"
-
-static enum {
- DEVICE_TYPE_TUN,
- DEVICE_TYPE_TAP,
-} device_type = DEVICE_TYPE_TUN;
-
-int device_fd = -1;
-static int if_fd = -1;
-static int ip_fd = -1;
-char *device = NULL;
-char *iface = NULL;
-static char *device_info = NULL;
-
-static bool setup_device(void) {
- char *type;
-
- if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
- if(routing_mode == RMODE_ROUTER)
- device = xstrdup(DEFAULT_TUN_DEVICE);
- else
- device = xstrdup(DEFAULT_TAP_DEVICE);
- }
-
- if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
- if(!strcasecmp(type, "tun"))
- /* use default */;
- else if(!strcasecmp(type, "tap"))
- device_type = DEVICE_TYPE_TAP;
- else {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unknown device type %s!", type);
- return false;
- }
- } else {
- if(strstr(device, "tap") || routing_mode != RMODE_ROUTER)
- device_type = DEVICE_TYPE_TAP;
- }
-
- if(device_type == DEVICE_TYPE_TUN)
- device_info = "Solaris tun device";
- else
- device_info = "Solaris tap device";
-
- /* The following is black magic copied from OpenVPN. */
-
- if((ip_fd = open("/dev/ip", O_RDWR, 0)) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s\n", "/dev/ip", strerror(errno));
- return false;
- }
-
- if((device_fd = open(device, O_RDWR, 0)) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s\n", device, strerror(errno));
- return false;
- }
-
- /* Get unit number. */
-
- char *ptr = device;
- get_config_string(lookup_config(config_tree, "Interface"), &ptr);
-
- while(*ptr && !isdigit(*ptr))
- ptr++;
- int ppa = atoi(ptr);
-
- /* Assign a new PPA and get its unit number. */
-
- struct strioctl strioc_ppa = {
- .ic_cmd = TUNNEWPPA,
- .ic_len = sizeof ppa,
- .ic_dp = (char *)&ppa,
- };
-
- if(!*ptr) { /* no number given, try dynamic */
- bool found = false;
- while(!found && ppa < 64) {
- int new_ppa = ioctl(device_fd, I_STR, &strioc_ppa);
- if(new_ppa >= 0) {
- ppa = new_ppa;
- found = true;
- break;
- }
- ppa++;
- }
- if(!found) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not find free PPA for %s %s!", device_info, device);
- return false;
- }
- } else { /* try this particular one */
- if((ppa = ioctl(device_fd, I_STR, &strioc_ppa)) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not assign PPA %d for %s %s!", ppa, device_info, device);
- return false;
- }
- }
-
- if((if_fd = open(device, O_RDWR, 0)) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s\n", device, strerror(errno));
- return false;
- }
-
- if(ioctl(if_fd, I_PUSH, "ip") < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not push IP module onto %s %s!", device_info, device);
- return false;
- }
-
- xasprintf(&iface, "%s%d", device_type == DEVICE_TYPE_TUN ? "tun" : "tap", ppa);
-
- {
- /* Remove muxes just in case they are left over from a crashed tincd */
- struct lifreq ifr = {};
- strncpy(ifr.lifr_name, iface, sizeof ifr.lifr_name);
- if(ioctl(ip_fd, SIOCGLIFMUXID, &ifr) >= 0) {
- int muxid = ifr.lifr_arp_muxid;
- ioctl(ip_fd, I_PUNLINK, muxid);
- muxid = ifr.lifr_ip_muxid;
- ioctl(ip_fd, I_PUNLINK, muxid);
- }
- }
-
- if(device_type == DEVICE_TYPE_TUN) {
- /* Assign ppa according to the unit number returned by tun device */
- if(ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not set PPA %d on %s %s!", ppa, device_info, device);
- return false;
- }
- }
-
- int arp_fd = -1;
-
- if(device_type == DEVICE_TYPE_TAP) {
- struct lifreq ifr = {};
-
- if(ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not set flags on %s %s!", device_info, device);
- return false;
- }
-
- strncpy(ifr.lifr_name, iface, sizeof(ifr.lifr_name));
- ifr.lifr_ppa = ppa;
-
- /* Assign ppa according to the unit number returned by tun device */
- if(ioctl(if_fd, SIOCSLIFNAME, &ifr) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not set PPA %d on %s %s!", ppa, device_info, device);
- return false;
- }
- if(ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not set flags on %s %s!", device_info, device);
- return false;
- }
-
- /* Push arp module to if_fd */
- if(ioctl(if_fd, I_PUSH, "arp") < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not push ARP module onto %s %s!", device_info, device);
- return false;
- }
-
- /* Pop any modules on the stream */
- while(true) {
- if(ioctl(ip_fd, I_POP, NULL) < 0)
- break;
- }
-
- /* Push arp module to ip_fd */
- if(ioctl(ip_fd, I_PUSH, "arp") < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not push ARP module onto %s!", "/dev/ip");
- return false;
- }
-
- /* Open arp_fd */
- if((arp_fd = open(device, O_RDWR, 0)) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s\n", device, strerror(errno));
- return false;
- }
-
- /* Push arp module to arp_fd */
- if(ioctl(arp_fd, I_PUSH, "arp") < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not push ARP module onto %s %s!", device_info, device);
- return false;
- }
-
- /* Set ifname to arp */
- struct strioctl strioc_if = {
- .ic_cmd = SIOCSLIFNAME,
- .ic_len = sizeof ifr,
- .ic_dp = (char *)&ifr,
- };
-
- if(ioctl(arp_fd, I_STR, &strioc_if) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not set ifname to %s %s", device_info, device);
- return false;
- }
- }
-
- int ip_muxid, arp_muxid;
-
- if((ip_muxid = ioctl(ip_fd, I_PLINK, if_fd)) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not link %s %s to IP", device_info, device);
- return false;
- }
-
- if(device_type == DEVICE_TYPE_TAP) {
- if((arp_muxid = ioctl(ip_fd, I_PLINK, arp_fd)) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not link %s %s to ARP", device_info, device);
- return false;
- }
- close(arp_fd);
- }
-
- struct lifreq ifr = {};
- strncpy(ifr.lifr_name, iface, sizeof(ifr.lifr_name));
- ifr.lifr_ip_muxid = ip_muxid;
- if(device_type == DEVICE_TYPE_TAP) {
- ifr.lifr_arp_muxid = arp_muxid;
- }
-
- if(ioctl(ip_fd, SIOCSLIFMUXID, &ifr) < 0) {
- if(device_type == DEVICE_TYPE_TAP) {
- ioctl(ip_fd, I_PUNLINK, arp_muxid);
- }
- ioctl(ip_fd, I_PUNLINK, ip_muxid);
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not set multiplexor id for %s %s", device_info, device);
- return false;
- }
-
- close(if_fd);
-
-#ifdef FD_CLOEXEC
- fcntl(device_fd, F_SETFD, FD_CLOEXEC);
- fcntl(ip_fd, F_SETFD, FD_CLOEXEC);
-#endif
-
- logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
-
- return true;
-}
-
-static void close_device(void) {
- if(iface) {
- struct lifreq ifr = {};
- strncpy(ifr.lifr_name, iface, sizeof ifr.lifr_name);
- if(ioctl(ip_fd, SIOCGLIFMUXID, &ifr) >= 0) {
- int muxid = ifr.lifr_arp_muxid;
- ioctl(ip_fd, I_PUNLINK, muxid);
- muxid = ifr.lifr_ip_muxid;
- ioctl(ip_fd, I_PUNLINK, muxid);
- }
- }
-
- close(ip_fd);
- close(device_fd);
-
- free(device);
- free(iface);
-}
-
-static bool read_packet(vpn_packet_t *packet) {
- int inlen;
-
- switch(device_type) {
- case DEVICE_TYPE_TUN:
- if((inlen = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
- logger(DEBUG_ALWAYS, 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;
- case 6:
- packet->data[12] = 0x86;
- packet->data[13] = 0xDD;
- break;
- default:
- logger(DEBUG_TRAFFIC, 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 = inlen + 14;
- break;
-
- case DEVICE_TYPE_TAP:
- if((inlen = read(device_fd, packet->data, MTU)) <= 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno));
- return false;
- }
-
- packet->len = inlen + 14;
- break;
-
- default:
- abort();
- }
-
- logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len, device_info);
-
- return true;
-}
-
-static bool write_packet(vpn_packet_t *packet) {
- logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s", packet->len, device_info);
-
- switch(device_type) {
- case DEVICE_TYPE_TUN:
- if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
- logger(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno));
- return false;
- }
- break;
-
- default:
- abort();
- }
-
- return true;
-}
-
-const devops_t os_devops = {
- .setup = setup_device,
- .close = close_device,
- .read = read_packet,
- .write = write_packet,
-};
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