/*
- * Open AnyConnect (SSL + DTLS) client
+ * OpenConnect (SSL + DTLS) VPN client
*
- * © 2008 David Woodhouse <dwmw2@infradead.org>
+ * Copyright © 2008-2012 Intel Corporation.
*
- * This library is free software; you can redistribute it and/or
+ * Author: David Woodhouse <dwmw2@infradead.org>
+ *
+ * This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation; either version 2.1 of
- * the License, or (at your option) any later version.
+ * version 2.1, as published by the Free Software Foundation.
*
- * This library is distributed in the hope that it will be useful, but
+ * 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
* Lesser General Public License for more details.
* Boston, MA 02110-1301 USA
*/
-#include <string.h>
-#include <sys/socket.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-#ifndef __APPLE__
-#include <linux/if_tun.h>
-#endif
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/wait.h>
+#include <string.h>
+#include <signal.h>
#include <fcntl.h>
#include <unistd.h>
+#include <netdb.h>
+#include <netinet/in_systm.h>
#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <net/if.h>
#include <arpa/inet.h>
#include <errno.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#if defined(__sun__)
+#include <stropts.h>
+#include <sys/sockio.h>
+#include <net/if_tun.h>
+#ifndef TUNNEWPPA
+#error "Install TAP driver from http://www.whiteboard.ne.jp/~admin2/tuntap/"
+#endif
+#endif
+
+#include "openconnect-internal.h"
-#include "openconnect.h"
+/*
+ * If an if_tun.h include file was found anywhere (by the Makefile), it's
+ * included. Else, we end up assuming that we have BSD-style devices such
+ * as /dev/tun0 etc.
+ */
+#ifdef IF_TUN_HDR
+#include IF_TUN_HDR
+#endif
+
+/*
+ * The OS X tun/tap driver doesn't provide a header file; you're expected
+ * to define this for yourself.
+ */
+#ifdef __APPLE__
+#define TUNSIFHEAD _IOW('t', 96, int)
+#endif
+
+/*
+ * OpenBSD always puts the protocol family prefix onto packets. Other
+ * systems let us enable that with the TUNSIFHEAD ioctl, and some of them
+ * (e.g. FreeBSD) _need_ it otherwise they'll interpret IPv6 packets as IPv4.
+ */
+#if defined(__OpenBSD__) || defined(TUNSIFHEAD)
+#define TUN_HAS_AF_PREFIX 1
+#endif
-static int local_config_tun(struct openconnect_info *vpninfo, int mtu_only)
+static int set_tun_mtu(struct openconnect_info *vpninfo)
{
+#ifndef __sun__ /* We don't know how to do this on Solaris */
struct ifreq ifr;
int net_fd;
net_fd = socket(PF_INET, SOCK_DGRAM, 0);
if (net_fd < 0) {
- perror("open net");
+ perror(_("open net"));
return -EINVAL;
}
+
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, vpninfo->ifname, sizeof(ifr.ifr_name) - 1);
+ ifr.ifr_mtu = vpninfo->actual_mtu;
- if (!mtu_only) {
- struct sockaddr_in *addr = (struct sockaddr_in *) &ifr.ifr_addr;
-
- if (ioctl(net_fd, SIOCGIFFLAGS, &ifr) < 0)
- perror("SIOCGIFFLAGS");
-
- ifr.ifr_flags |= IFF_UP | IFF_POINTOPOINT;
- if (ioctl(net_fd, SIOCSIFFLAGS, &ifr) < 0)
- perror("SIOCSIFFLAGS");
-
- addr->sin_family = AF_INET;
- addr->sin_addr.s_addr = inet_addr(vpninfo->vpn_addr);
- if (ioctl(net_fd, SIOCSIFADDR, &ifr) < 0)
- perror("SIOCSIFADDR");
- }
-
- ifr.ifr_mtu = vpninfo->mtu;
if (ioctl(net_fd, SIOCSIFMTU, &ifr) < 0)
- perror("SIOCSIFMTU");
+ perror(_("SIOCSIFMTU"));
close(net_fd);
-
+#endif
return 0;
}
+
static int setenv_int(const char *opt, int value)
{
char buf[16];
return setenv(opt, buf, 1);
}
-static int process_split_include(struct openconnect_info *vpninfo,
- char *route, int *nr_incs)
+static int netmasklen(struct in_addr addr)
{
- struct in_addr addr;
int masklen;
+
+ for (masklen = 0; masklen < 32; masklen++) {
+ if (ntohl(addr.s_addr) >= (0xffffffff << masklen))
+ break;
+ }
+ return 32 - masklen;
+}
+
+static int process_split_xxclude(struct openconnect_info *vpninfo,
+ int include, const char *route, int *v4_incs,
+ int *v6_incs)
+{
+ struct in_addr addr;
+ const char *in_ex = include?"IN":"EX";
char envname[80];
char *slash;
slash = strchr(route, '/');
if (!slash) {
badinc:
- vpninfo->progress(vpninfo, PRG_ERR,
- "Discard bad split include: \"%s\"\n",
- route);
+ if (include)
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Discard bad split include: \"%s\"\n"),
+ route);
+ else
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Discard bad split exclude: \"%s\"\n"),
+ route);
return -EINVAL;
}
*slash = 0;
+
+ if (strchr(route, ':')) {
+ snprintf(envname, 79, "CISCO_IPV6_SPLIT_%sC_%d_ADDR", in_ex,
+ *v6_incs);
+ setenv(envname, route, 1);
+
+ snprintf(envname, 79, "CISCO_IPV6_SPLIT_%sC_%d_MASKLEN", in_ex,
+ *v6_incs);
+ setenv(envname, slash+1, 1);
+
+ (*v6_incs)++;
+ return 0;
+ }
+
if (!inet_aton(route, &addr)) {
*slash = '/';
goto badinc;
}
envname[79] = 0;
- snprintf(envname, 79, "CISCO_SPLIT_INC_%d_ADDR", *nr_incs);
+ snprintf(envname, 79, "CISCO_SPLIT_%sC_%d_ADDR", in_ex, *v4_incs);
setenv(envname, route, 1);
/* Put it back how we found it */
if (!inet_aton(slash+1, &addr))
goto badinc;
- snprintf(envname, 79, "CISCO_SPLIT_INC_%d_MASK", *nr_incs);
+ snprintf(envname, 79, "CISCO_SPLIT_%sC_%d_MASK", in_ex, *v4_incs);
setenv(envname, slash+1, 1);
- for (masklen = 0; masklen < 32; masklen++) {
- if (ntohl(addr.s_addr) >= (0xffffffff << masklen))
- break;
- }
- masklen = 32 - masklen;
-
- snprintf(envname, 79, "CISCO_SPLIT_INC_%d_MASKLEN", *nr_incs);
- setenv_int(envname, masklen);
+ snprintf(envname, 79, "CISCO_SPLIT_%sC_%d_MASKLEN", in_ex, *v4_incs);
+ setenv_int(envname, netmasklen(addr));
- (*nr_incs)++;
+ (*v4_incs)++;
return 0;
}
return setenv(opt, buf, 1);
}
+static void setenv_cstp_opts(struct openconnect_info *vpninfo)
+{
+ char *env_buf;
+ int buflen = 0;
+ int bufofs = 0;
+ struct vpn_option *opt;
+
+ for (opt = vpninfo->cstp_options; opt; opt = opt->next)
+ buflen += 2 + strlen(opt->option) + strlen(opt->value);
+
+ env_buf = malloc(buflen + 1);
+ if (!env_buf)
+ return;
+
+ env_buf[buflen] = 0;
+
+ for (opt = vpninfo->cstp_options; opt; opt = opt->next)
+ bufofs += snprintf(env_buf + bufofs, buflen - bufofs,
+ "%s=%s\n", opt->option, opt->value);
+
+ setenv("CISCO_CSTP_OPTIONS", env_buf, 1);
+ free(env_buf);
+}
+
+static void set_banner(struct openconnect_info *vpninfo)
+{
+ char *banner, *q;
+ const char *p;
+
+ if (!vpninfo->banner || !(banner = malloc(strlen(vpninfo->banner)+1))) {
+ unsetenv("CISCO_BANNER");
+ return;
+ }
+ p = vpninfo->banner;
+ q = banner;
+
+ while (*p) {
+ if (*p == '%' && isxdigit((int)(unsigned char)p[1]) &&
+ isxdigit((int)(unsigned char)p[2])) {
+ *(q++) = unhex(p + 1);
+ p += 3;
+ } else
+ *(q++) = *(p++);
+ }
+ *q = 0;
+ setenv("CISCO_BANNER", banner, 1);
+
+ free(banner);
+}
+
static void set_script_env(struct openconnect_info *vpninfo)
{
- struct sockaddr_in *sin = (void *)vpninfo->peer_addr;
+ char host[80];
+ int ret = getnameinfo(vpninfo->peer_addr, vpninfo->peer_addrlen, host,
+ sizeof(host), NULL, 0, NI_NUMERICHOST);
+ if (!ret)
+ setenv("VPNGATEWAY", host, 1);
- setenv("VPNGATEWAY", inet_ntoa(sin->sin_addr), 1);
- setenv("TUNDEV", vpninfo->ifname, 1);
- setenv("reason", "connect", 1);
- unsetenv("CISCO_BANNER");
+ set_banner(vpninfo);
unsetenv("CISCO_SPLIT_INC");
+ unsetenv("CISCO_SPLIT_EXC");
- setenv_int("INTERNAL_IP4_MTU", vpninfo->mtu);
+ setenv_int("INTERNAL_IP4_MTU", vpninfo->actual_mtu);
+
+ if (vpninfo->vpn_addr) {
+ setenv("INTERNAL_IP4_ADDRESS", vpninfo->vpn_addr, 1);
+ if (vpninfo->vpn_netmask) {
+ struct in_addr addr;
+ struct in_addr mask;
+
+ if (inet_aton(vpninfo->vpn_addr, &addr) &&
+ inet_aton(vpninfo->vpn_netmask, &mask)) {
+ char *netaddr;
+
+ addr.s_addr &= mask.s_addr;
+ netaddr = inet_ntoa(addr);
+
+ setenv("INTERNAL_IP4_NETADDR", netaddr, 1);
+ setenv("INTERNAL_IP4_NETMASK", vpninfo->vpn_netmask, 1);
+ setenv_int("INTERNAL_IP4_NETMASKLEN", netmasklen(mask));
+ }
+ }
+ }
+ if (vpninfo->vpn_addr6) {
+ setenv("INTERNAL_IP6_ADDRESS", vpninfo->vpn_addr6, 1);
+ setenv("INTERNAL_IP6_NETMASK", vpninfo->vpn_netmask6, 1);
+ }
- setenv("INTERNAL_IP4_ADDRESS", vpninfo->vpn_addr, 1);
- setenv("INTERNAL_IP4_NETMASK", vpninfo->vpn_netmask, 1);
-
if (vpninfo->vpn_dns[0])
setenv("INTERNAL_IP4_DNS", vpninfo->vpn_dns[0], 1);
else
setenv("CISCO_DEF_DOMAIN", vpninfo->vpn_domain, 1);
else unsetenv ("CISCO_DEF_DOMAIN");
+ if (vpninfo->vpn_proxy_pac)
+ setenv("CISCO_PROXY_PAC", vpninfo->vpn_proxy_pac, 1);
+
+ if (vpninfo->split_dns) {
+ char *list;
+ int len = 0;
+ struct split_include *dns = vpninfo->split_dns;
+
+ while (dns) {
+ len += strlen(dns->route) + 1;
+ dns = dns->next;
+ }
+ list = malloc(len);
+ if (list) {
+ char *p = list;
+
+ dns = vpninfo->split_dns;
+ while (1) {
+ strcpy(p, dns->route);
+ p += strlen(p);
+ dns = dns->next;
+ if (!dns)
+ break;
+ *(p++) = ',';
+ }
+ setenv("CISCO_SPLIT_DNS", list, 1);
+ free(list);
+ }
+ }
if (vpninfo->split_includes) {
struct split_include *this = vpninfo->split_includes;
int nr_split_includes = 0;
+ int nr_v6_split_includes = 0;
+
+ while (this) {
+ process_split_xxclude(vpninfo, 1, this->route,
+ &nr_split_includes,
+ &nr_v6_split_includes);
+ this = this->next;
+ }
+ if (nr_split_includes)
+ setenv_int("CISCO_SPLIT_INC", nr_split_includes);
+ if (nr_v6_split_includes)
+ setenv_int("CISCO_IPV6_SPLIT_INC", nr_v6_split_includes);
+ }
+ if (vpninfo->split_excludes) {
+ struct split_include *this = vpninfo->split_excludes;
+ int nr_split_excludes = 0;
+ int nr_v6_split_excludes = 0;
while (this) {
- process_split_include(vpninfo, this->route,
- &nr_split_includes);
+ process_split_xxclude(vpninfo, 0, this->route,
+ &nr_split_excludes,
+ &nr_v6_split_excludes);
this = this->next;
}
- setenv_int("CISCO_SPLIT_INC", nr_split_includes);
- }
-
-
+ if (nr_split_excludes)
+ setenv_int("CISCO_SPLIT_EXC", nr_split_excludes);
+ if (nr_v6_split_excludes)
+ setenv_int("CISCO_IPV6_SPLIT_EXC", nr_v6_split_excludes);
+ }
+ setenv_cstp_opts(vpninfo);
}
-static int script_config_tun(struct openconnect_info *vpninfo)
+int script_config_tun(struct openconnect_info *vpninfo, const char *reason)
{
- if (vpninfo->peer_addr->sa_family != AF_INET) {
- vpninfo->progress(vpninfo, PRG_ERR, "Script cannot handle anything but Legacy IP\n");
- return -EINVAL;
+ int ret;
+
+ if (!vpninfo->vpnc_script || vpninfo->script_tun)
+ return 0;
+
+ setenv("reason", reason, 1);
+ ret = system(vpninfo->vpnc_script);
+ if (ret == -1) {
+ int e = errno;
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Failed to spawn script '%s' for %s: %s\n"),
+ vpninfo->vpnc_script, reason, strerror(e));
+ return -e;
+ }
+ if (!WIFEXITED(ret)) {
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Script '%s' exited abnormally (%x)\n"),
+ vpninfo->vpnc_script, ret);
+ return -EIO;
}
+ ret = WEXITSTATUS(ret);
+ if (ret) {
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Script '%s' returned error %d\n"),
+ vpninfo->vpnc_script, ret);
+ return -EIO;
+ }
+ return 0;
+}
- set_script_env(vpninfo);
+#ifdef __sun__
+static int link_proto(int unit_nr, const char *devname, uint64_t flags)
+{
+ int ip_fd, mux_id, tun2_fd;
+ struct lifreq ifr;
- system(vpninfo->vpnc_script);
- return 0;
+ tun2_fd = open("/dev/tun", O_RDWR);
+ if (tun2_fd < 0) {
+ perror(_("Could not open /dev/tun for plumbing"));
+ return -EIO;
+ }
+ if (ioctl(tun2_fd, I_PUSH, "ip") < 0) {
+ perror(_("Can't push IP"));
+ close(tun2_fd);
+ return -EIO;
+ }
+
+ sprintf(ifr.lifr_name, "tun%d", unit_nr);
+ ifr.lifr_ppa = unit_nr;
+ ifr.lifr_flags = flags;
+
+ if (ioctl(tun2_fd, SIOCSLIFNAME, &ifr) < 0) {
+ perror(_("Can't set ifname"));
+ close(tun2_fd);
+ return -1;
+ }
+
+ ip_fd = open(devname, O_RDWR);
+ if (ip_fd < 0) {
+ fprintf(stderr, _("Can't open %s: %s"), devname,
+ strerror(errno));
+ close(tun2_fd);
+ return -1;
+ }
+
+ mux_id = ioctl(ip_fd, I_LINK, tun2_fd);
+ if (mux_id < 0) {
+ fprintf(stderr, _("Can't plumb %s for IPv%d: %s\n"),
+ ifr.lifr_name, (flags == IFF_IPV4) ? 4 : 6,
+ strerror(errno));
+ close(tun2_fd);
+ close(ip_fd);
+ return -1;
+ }
+
+ close(tun2_fd);
+
+ return ip_fd;
}
+#endif
+
+#ifdef SIOCIFCREATE
+static int bsd_open_tun(char *tun_name)
+{
+ int fd;
+ int s;
+ struct ifreq ifr;
+
+ fd = open(tun_name, O_RDWR);
+ if (fd >= 0) {
+ return fd;
+
+ s = socket(AF_INET, SOCK_DGRAM, 0);
+ if (s < 0)
+ return -1;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, tun_name + 5, sizeof(ifr.ifr_name) - 1);
+ if (!ioctl(s, SIOCIFCREATE, &ifr))
+ fd = open(tun_name, O_RDWR);
+
+ close(s);
+ }
+ return fd;
+}
+#else
+#define bsd_open_tun(tun_name) open(tun_name, O_RDWR)
+#endif
+
+static int os_setup_tun(struct openconnect_info *vpninfo)
+{
+ int tun_fd = -1;
+
+#ifdef IFF_TUN /* Linux */
+ struct ifreq ifr;
+ int tunerr;
+
+ tun_fd = open("/dev/net/tun", O_RDWR);
+ if (tun_fd < 0) {
+ /* Android has /dev/tun instead of /dev/net/tun
+ Since other systems might have too, just try it
+ as a fallback instead of using ifdef __ANDROID__ */
+ tunerr = errno;
+ tun_fd = open("/dev/tun", O_RDWR);
+ }
+ if (tun_fd < 0) {
+ /* If the error on /dev/tun is ENOENT, that's boring.
+ Use the error we got on /dev/net/tun instead */
+ if (errno != ENOENT)
+ tunerr = errno;
+
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Failed to open tun device: %s\n"),
+ strerror(tunerr));
+ exit(1);
+ }
+ memset(&ifr, 0, sizeof(ifr));
+ ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
+ if (vpninfo->ifname)
+ strncpy(ifr.ifr_name, vpninfo->ifname,
+ sizeof(ifr.ifr_name) - 1);
+ if (ioctl(tun_fd, TUNSETIFF, (void *) &ifr) < 0) {
+ vpn_progress(vpninfo, PRG_ERR,
+ _("TUNSETIFF failed: %s\n"),
+ strerror(errno));
+ exit(1);
+ }
+ if (!vpninfo->ifname)
+ vpninfo->ifname = strdup(ifr.ifr_name);
+#elif defined (__sun__)
+ static char tun_name[80];
+ int unit_nr;
+
+ tun_fd = open("/dev/tun", O_RDWR);
+ if (tun_fd < 0) {
+ perror(_("open /dev/tun"));
+ return -EIO;
+ }
+
+ unit_nr = ioctl(tun_fd, TUNNEWPPA, -1);
+ if (unit_nr < 0) {
+ perror(_("Failed to create new tun"));
+ close(tun_fd);
+ return -EIO;
+ }
+ if (ioctl(tun_fd, I_SRDOPT, RMSGD) < 0) {
+ perror(_("Failed to put tun file descriptor into message-discard mode"));
+ close(tun_fd);
+ return -EIO;
+ }
+
+ sprintf(tun_name, "tun%d", unit_nr);
+ vpninfo->ifname = strdup(tun_name);
+
+ vpninfo->ip_fd = link_proto(unit_nr, "/dev/udp", IFF_IPV4);
+ if (vpninfo->ip_fd < 0) {
+ close(tun_fd);
+ return -EIO;
+ }
+
+ if (vpninfo->vpn_addr6) {
+ vpninfo->ip6_fd = link_proto(unit_nr, "/dev/udp6", IFF_IPV6);
+ if (vpninfo->ip6_fd < 0) {
+ close(tun_fd);
+ close(vpninfo->ip_fd);
+ vpninfo->ip_fd = -1;
+ return -EIO;
+ }
+ } else
+ vpninfo->ip6_fd = -1;
+
+#else /* BSD et al have /dev/tun$x devices */
+ static char tun_name[80];
+ int i;
+
+ if (vpninfo->ifname) {
+ char *endp = NULL;
+ if (strncmp(vpninfo->ifname, "tun", 3) ||
+ ((void)strtol(vpninfo->ifname + 3, &endp, 10), !endp) ||
+ *endp) {
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Invalid interface name '%s'; must match 'tun%%d'\n"),
+ vpninfo->ifname);
+ return -EINVAL;
+ }
+ snprintf(tun_name, sizeof(tun_name),
+ "/dev/%s", vpninfo->ifname);
+ tun_fd = bsd_open_tun(tun_name);
+ if (tun_fd < 0) {
+ int err = errno;
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Cannot open '%s': %s\n"),
+ tun_name, strerror(err));
+ return -EINVAL;
+ }
+ }
+#ifdef HAVE_FDEVNAME_R
+ /* We don't have to iterate over the possible devices; on FreeBSD
+ at least, opening /dev/tun will give us the next available
+ device. */
+ if (tun_fd < 0) {
+ tun_fd = open("/dev/tun", O_RDWR);
+ if (tun_fd >= 0) {
+ if (!fdevname_r(tun_fd, tun_name, sizeof(tun_name)) ||
+ strncmp(tun_name, "tun", 3)) {
+ close(tun_fd);
+ tun_fd = -1;
+ } else
+ vpninfo->ifname = strdup(tun_name);
+ }
+ }
+#endif
+ if (tun_fd < 0) {
+ for (i = 0; i < 255; i++) {
+ sprintf(tun_name, "/dev/tun%d", i);
+ tun_fd = bsd_open_tun(tun_name);
+ if (tun_fd >= 0)
+ break;
+ }
+ if (tun_fd < 0) {
+ perror(_("open tun"));
+ exit(1);
+ }
+ vpninfo->ifname = strdup(tun_name + 5);
+ }
+#ifdef TUNSIFHEAD
+ i = 1;
+ if (ioctl(tun_fd, TUNSIFHEAD, &i) < 0) {
+ perror(_("TUNSIFHEAD"));
+ exit(1);
+ }
+#endif
+#endif
+ return tun_fd;
+}
/* Set up a tuntap device. */
int setup_tun(struct openconnect_info *vpninfo)
{
- struct ifreq ifr;
int tun_fd;
+ set_script_env(vpninfo);
+
if (vpninfo->script_tun) {
pid_t child;
int fds[2];
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, fds)) {
- perror("socketpair");
+ perror(_("socketpair"));
exit(1);
}
tun_fd = fds[0];
child = fork();
if (child < 0) {
- perror("fork");
+ perror(_("fork"));
exit(1);
} else if (!child) {
+ if (setpgid(0, getpid()) < 0)
+ perror(_("setpgid"));
close(tun_fd);
setenv_int("VPNFD", fds[1]);
execl("/bin/sh", "/bin/sh", "-c", vpninfo->vpnc_script, NULL);
- perror("execl");
+ perror(_("execl"));
exit(1);
}
close(fds[1]);
vpninfo->script_tun = child;
- vpninfo->ifname = "(script)";
+ vpninfo->ifname = strdup(_("(script)"));
} else {
-#ifdef __APPLE__
- static char tun_name[80];
- int i;
- for (i=0; i < 255; i++) {
- sprintf(tun_name, "/dev/tun%d", i);
- tun_fd = open(tun_name, O_RDWR);
- if (tun_fd >= 0)
- break;
- }
- if (tun_fd < 0) {
- perror("open tun");
- exit(1);
- }
- vpninfo->ifname = tun_name + 5;
-#else
+ script_config_tun(vpninfo, "pre-init");
- tun_fd = open("/dev/net/tun", O_RDWR);
- if (tun_fd < 0) {
- vpninfo->progress(vpninfo, PRG_ERR,
- "Failed to open tun device: %s\n",
- strerror(errno));
- exit(1);
- }
- memset(&ifr, 0, sizeof(ifr));
- ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
- if (vpninfo->ifname)
- strncpy(ifr.ifr_name, vpninfo->ifname,
- sizeof(ifr.ifr_name) - 1);
- if (ioctl(tun_fd, TUNSETIFF, (void *) &ifr) < 0) {
- vpninfo->progress(vpninfo, PRG_ERR,
- "TUNSETIFF failed: %s\n",
- strerror(errno));
- exit(1);
- }
- if (!vpninfo->ifname)
- vpninfo->ifname = strdup(ifr.ifr_name);
+ tun_fd = os_setup_tun(vpninfo);
+ if (tun_fd < 0)
+ return tun_fd;
-#endif
- if (vpninfo->vpnc_script) {
- script_config_tun(vpninfo);
- /* We have to set the MTU for ourselves, because the script doesn't */
- local_config_tun(vpninfo, 1);
- } else
- local_config_tun(vpninfo, 0);
+ setenv("TUNDEV", vpninfo->ifname, 1);
+ script_config_tun(vpninfo, "connect");
+
+ /* Ancient vpnc-scripts might not get this right */
+ set_tun_mtu(vpninfo);
}
fcntl(tun_fd, F_SETFD, FD_CLOEXEC);
vpninfo->tun_fd = tun_fd;
-
+
if (vpninfo->select_nfds <= tun_fd)
vpninfo->select_nfds = tun_fd + 1;
return 0;
}
+static struct pkt *out_pkt;
+
int tun_mainloop(struct openconnect_info *vpninfo, int *timeout)
{
- char buf[2000];
- int len;
int work_done = 0;
+ int prefix_size = 0;
+
+#ifdef TUN_HAS_AF_PREFIX
+ if (!vpninfo->script_tun)
+ prefix_size = sizeof(int);
+#endif
if (FD_ISSET(vpninfo->tun_fd, &vpninfo->select_rfds)) {
- while ((len = read(vpninfo->tun_fd, buf, sizeof(buf))) > 0) {
- if (queue_new_packet(&vpninfo->outgoing_queue, AF_INET, buf, len))
+ while (1) {
+ int len = vpninfo->actual_mtu;
+
+ if (!out_pkt) {
+ out_pkt = malloc(sizeof(struct pkt) + len);
+ if (!out_pkt) {
+ vpn_progress(vpninfo, PRG_ERR, "Allocation failed\n");
+ break;
+ }
+ }
+
+ len = read(vpninfo->tun_fd, out_pkt->data - prefix_size, len + prefix_size);
+ if (len <= prefix_size)
break;
+ out_pkt->len = len - prefix_size;
+
+ queue_packet(&vpninfo->outgoing_queue, out_pkt);
+ out_pkt = NULL;
work_done = 1;
vpninfo->outgoing_qlen++;
the no-longer-full situation, so let's not bother. */
while (vpninfo->incoming_queue) {
struct pkt *this = vpninfo->incoming_queue;
+ unsigned char *data = this->data;
+ int len = this->len;
+
+#ifdef TUN_HAS_AF_PREFIX
+ if (!vpninfo->script_tun) {
+ struct ip *iph = (void *)data;
+ int type;
+
+ if (iph->ip_v == 6)
+ type = AF_INET6;
+ else if (iph->ip_v == 4)
+ type = AF_INET;
+ else {
+ static int complained = 0;
+ if (!complained) {
+ complained = 1;
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Unknown packet (len %d) received: %02x %02x %02x %02x...\n"),
+ len, data[0], data[1], data[2], data[3]);
+ }
+ free(this);
+ continue;
+ }
+ data -= 4;
+ len += 4;
+ *(int *)data = htonl(type);
+ }
+#endif
vpninfo->incoming_queue = this->next;
- if (write(vpninfo->tun_fd, this->data, this->len) < 0 &&
- errno == ENOTCONN) {
- vpninfo->quit_reason = "Client connection terminated";
- return 1;
+
+ if (write(vpninfo->tun_fd, data, len) < 0) {
+ /* Handle death of "script" socket */
+ if (vpninfo->script_tun && errno == ENOTCONN) {
+ vpninfo->quit_reason = "Client connection terminated";
+ return 1;
+ }
+ vpn_progress(vpninfo, PRG_ERR,
+ _("Failed to write incoming packet: %s\n"),
+ strerror(errno));
}
+ free(this);
}
/* Work is not done if we just got rid of packets off the queue */
return work_done;
}
+
+void shutdown_tun(struct openconnect_info *vpninfo)
+{
+ if (vpninfo->script_tun) {
+ /* nuke the whole process group */
+ kill(-vpninfo->script_tun, SIGHUP);
+ } else {
+ script_config_tun(vpninfo, "disconnect");
+#ifdef __sun__
+ close(vpninfo->ip_fd);
+ vpninfo->ip_fd = -1;
+ if (vpninfo->ip6_fd != -1) {
+ close(vpninfo->ip6_fd);
+ vpninfo->ip6_fd = -1;
+ }
+#endif
+ }
+
+ close(vpninfo->tun_fd);
+ vpninfo->tun_fd = -1;
+}
projects / platform / upstream / openconnect.git / blobdiff