diff options
Diffstat (limited to 'app/openvpn/src/openvpn/route.c')
| -rw-r--r-- | app/openvpn/src/openvpn/route.c | 3319 |
1 files changed, 0 insertions, 3319 deletions
diff --git a/app/openvpn/src/openvpn/route.c b/app/openvpn/src/openvpn/route.c deleted file mode 100644 index 8a778884..00000000 --- a/app/openvpn/src/openvpn/route.c +++ /dev/null @@ -1,3319 +0,0 @@ -/* - * OpenVPN -- An application to securely tunnel IP networks - * over a single TCP/UDP port, with support for SSL/TLS-based - * session authentication and key exchange, - * packet encryption, packet authentication, and - * packet compression. - * - * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * 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 (see the file COPYING included with this - * distribution); if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* - * Support routines for adding/deleting network routes. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#elif defined(_MSC_VER) -#include "config-msvc.h" -#endif - -#include "syshead.h" - -#include "common.h" -#include "error.h" -#include "route.h" -#include "misc.h" -#include "socket.h" -#include "manage.h" -#include "win32.h" -#include "options.h" - -#include "memdbg.h" - -#ifdef WIN32 -#define METRIC_NOT_USED ((DWORD)-1) -#endif - -static void delete_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct route_gateway_info *rgi, const struct env_set *es); - -static void get_bypass_addresses (struct route_bypass *rb, const unsigned int flags); - -#ifdef ENABLE_DEBUG - -static void -print_bypass_addresses (const struct route_bypass *rb) -{ - struct gc_arena gc = gc_new (); - int i; - for (i = 0; i < rb->n_bypass; ++i) - { - msg (D_ROUTE, "ROUTE: bypass_host_route[%d]=%s", - i, - print_in_addr_t (rb->bypass[i], 0, &gc)); - } - gc_free (&gc); -} - -#endif - -static bool -add_bypass_address (struct route_bypass *rb, const in_addr_t a) -{ - int i; - for (i = 0; i < rb->n_bypass; ++i) - { - if (a == rb->bypass[i]) /* avoid duplicates */ - return true; - } - if (rb->n_bypass < N_ROUTE_BYPASS) - { - rb->bypass[rb->n_bypass++] = a; - return true; - } - else - { - return false; - } -} - -struct route_option_list * -new_route_option_list (const int max_routes, struct gc_arena *a) -{ - struct route_option_list *ret; - ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_option_list, struct route_option, max_routes, a); - ret->capacity = max_routes; - return ret; -} - -struct route_ipv6_option_list * -new_route_ipv6_option_list (const int max_routes, struct gc_arena *a) -{ - struct route_ipv6_option_list *ret; - ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_ipv6_option_list, struct route_ipv6_option, max_routes, a); - ret->capacity = max_routes; - return ret; -} - -struct route_option_list * -clone_route_option_list (const struct route_option_list *src, struct gc_arena *a) -{ - const size_t rl_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list)); - struct route_option_list *ret = gc_malloc (rl_size, false, a); - memcpy (ret, src, rl_size); - return ret; -} - -struct route_ipv6_option_list * -clone_route_ipv6_option_list (const struct route_ipv6_option_list *src, struct gc_arena *a) -{ - const size_t rl_size = array_mult_safe (sizeof(struct route_ipv6_option), src->capacity, sizeof(struct route_ipv6_option_list)); - struct route_ipv6_option_list *ret = gc_malloc (rl_size, false, a); - memcpy (ret, src, rl_size); - return ret; -} - -void -copy_route_option_list (struct route_option_list *dest, const struct route_option_list *src) -{ - const size_t src_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list)); - if (src->capacity > dest->capacity) - msg (M_FATAL, PACKAGE_NAME " ROUTE: (copy) number of route options in src (%d) is greater than route list capacity in dest (%d)", src->capacity, dest->capacity); - memcpy (dest, src, src_size); -} - -void -copy_route_ipv6_option_list (struct route_ipv6_option_list *dest, - const struct route_ipv6_option_list *src) -{ - const size_t src_size = array_mult_safe (sizeof(struct route_ipv6_option), src->capacity, sizeof(struct route_ipv6_option_list)); - if (src->capacity > dest->capacity) - msg (M_FATAL, PACKAGE_NAME " ROUTE: (copy) number of route options in src (%d) is greater than route list capacity in dest (%d)", src->capacity, dest->capacity); - memcpy (dest, src, src_size); -} - -struct route_list * -new_route_list (const int max_routes, struct gc_arena *a) -{ - struct route_list *ret; - ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_list, struct route, max_routes, a); - ret->capacity = max_routes; - return ret; -} - -struct route_ipv6_list * -new_route_ipv6_list (const int max_routes, struct gc_arena *a) -{ - struct route_ipv6_list *ret; - ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_ipv6_list, struct route_ipv6, max_routes, a); - ret->capacity = max_routes; - return ret; -} - -static const char * -route_string (const struct route *r, struct gc_arena *gc) -{ - struct buffer out = alloc_buf_gc (256, gc); - buf_printf (&out, "ROUTE network %s netmask %s gateway %s", - print_in_addr_t (r->network, 0, gc), - print_in_addr_t (r->netmask, 0, gc), - print_in_addr_t (r->gateway, 0, gc) - ); - if (r->flags & RT_METRIC_DEFINED) - buf_printf (&out, " metric %d", r->metric); - return BSTR (&out); -} - -static bool -is_route_parm_defined (const char *parm) -{ - if (!parm) - return false; - if (!strcmp (parm, "default")) - return false; - return true; -} - -static void -setenv_route_addr (struct env_set *es, const char *key, const in_addr_t addr, int i) -{ - struct gc_arena gc = gc_new (); - struct buffer name = alloc_buf_gc (256, &gc); - if (i >= 0) - buf_printf (&name, "route_%s_%d", key, i); - else - buf_printf (&name, "route_%s", key); - setenv_str (es, BSTR (&name), print_in_addr_t (addr, 0, &gc)); - gc_free (&gc); -} - -static bool -get_special_addr (const struct route_list *rl, - const char *string, - in_addr_t *out, - bool *status) -{ - if (status) - *status = true; - if (!strcmp (string, "vpn_gateway")) - { - if (rl) - { - if (rl->spec.flags & RTSA_REMOTE_ENDPOINT) - *out = rl->spec.remote_endpoint; - else - { - msg (M_INFO, PACKAGE_NAME " ROUTE: vpn_gateway undefined"); - if (status) - *status = false; - } - } - return true; - } - else if (!strcmp (string, "net_gateway")) - { - if (rl) - { - if (rl->rgi.flags & RGI_ADDR_DEFINED) - *out = rl->rgi.gateway.addr; - else - { - msg (M_INFO, PACKAGE_NAME " ROUTE: net_gateway undefined -- unable to get default gateway from system"); - if (status) - *status = false; - } - } - return true; - } - else if (!strcmp (string, "remote_host")) - { - if (rl) - { - if (rl->spec.flags & RTSA_REMOTE_HOST) - *out = rl->spec.remote_host; - else - { - msg (M_INFO, PACKAGE_NAME " ROUTE: remote_host undefined"); - if (status) - *status = false; - } - } - return true; - } - return false; -} - -bool -is_special_addr (const char *addr_str) -{ - if (addr_str) - return get_special_addr (NULL, addr_str, NULL, NULL); - else - return false; -} - -static bool -init_route (struct route *r, - struct addrinfo **network_list, - const struct route_option *ro, - const struct route_list *rl) -{ - const in_addr_t default_netmask = IPV4_NETMASK_HOST; - bool status; - int ret; - struct in_addr special; - - CLEAR (*r); - r->option = ro; - - /* network */ - - if (!is_route_parm_defined (ro->network)) - { - goto fail; - } - - - /* get_special_addr replaces specialaddr with a special ip addr - like gw. getaddrinfo is called to convert a a addrinfo struct */ - - if(get_special_addr (rl, ro->network, &special.s_addr, &status)) - { - special.s_addr = htonl(special.s_addr); - ret = openvpn_getaddrinfo(0, inet_ntoa(special), NULL, 0, NULL, - AF_INET, network_list); - } - else - ret = openvpn_getaddrinfo(GETADDR_RESOLVE | GETADDR_WARN_ON_SIGNAL, - ro->network, NULL, 0, NULL, AF_INET, network_list); - - status = (ret == 0); - - if (!status) - goto fail; - - /* netmask */ - - if (is_route_parm_defined (ro->netmask)) - { - r->netmask = getaddr ( - GETADDR_HOST_ORDER - | GETADDR_WARN_ON_SIGNAL, - ro->netmask, - 0, - &status, - NULL); - if (!status) - goto fail; - } - else - r->netmask = default_netmask; - - /* gateway */ - - if (is_route_parm_defined (ro->gateway)) - { - if (!get_special_addr (rl, ro->gateway, &r->gateway, &status)) - { - r->gateway = getaddr ( - GETADDR_RESOLVE - | GETADDR_HOST_ORDER - | GETADDR_WARN_ON_SIGNAL, - ro->gateway, - 0, - &status, - NULL); - } - if (!status) - goto fail; - } - else - { - if (rl->spec.flags & RTSA_REMOTE_ENDPOINT) - r->gateway = rl->spec.remote_endpoint; - else - { - msg (M_WARN, PACKAGE_NAME " ROUTE: " PACKAGE_NAME " needs a gateway parameter for a --route option and no default was specified by either --route-gateway or --ifconfig options"); - goto fail; - } - } - - /* metric */ - - r->metric = 0; - if (is_route_parm_defined (ro->metric)) - { - r->metric = atoi (ro->metric); - if (r->metric < 0) - { - msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0", - ro->network, - ro->metric); - goto fail; - } - r->flags |= RT_METRIC_DEFINED; - } - else if (rl->spec.flags & RTSA_DEFAULT_METRIC) - { - r->metric = rl->spec.default_metric; - r->flags |= RT_METRIC_DEFINED; - } - - r->flags |= RT_DEFINED; - - return true; - - fail: - msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s", - ro->network); - return false; -} - -static bool -init_route_ipv6 (struct route_ipv6 *r6, - const struct route_ipv6_option *r6o, - const struct route_ipv6_list *rl6 ) -{ - r6->defined = false; - - if ( !get_ipv6_addr( r6o->prefix, &r6->network, &r6->netbits, NULL, M_WARN )) - goto fail; - - /* gateway */ - if (is_route_parm_defined (r6o->gateway)) - { - if ( inet_pton( AF_INET6, r6o->gateway, &r6->gateway ) != 1 ) - { - msg( M_WARN, PACKAGE_NAME "ROUTE6: cannot parse gateway spec '%s'", r6o->gateway ); - } - } - else if (rl6->remote_endpoint_defined) - { - r6->gateway = rl6->remote_endpoint_ipv6; - } - else - { - msg (M_WARN, PACKAGE_NAME " ROUTE6: " PACKAGE_NAME " needs a gateway parameter for a --route-ipv6 option and no default was specified by either --route-ipv6-gateway or --ifconfig-ipv6 options"); - goto fail; - } - - /* metric */ - - r6->metric_defined = false; - r6->metric = -1; - if (is_route_parm_defined (r6o->metric)) - { - r6->metric = atoi (r6o->metric); - if (r6->metric < 0) - { - msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0", - r6o->prefix, - r6o->metric); - goto fail; - } - r6->metric_defined = true; - } - else if (rl6->default_metric_defined) - { - r6->metric = rl6->default_metric; - r6->metric_defined = true; - } - - r6->defined = true; - - return true; - - fail: - msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s", - r6o->prefix); - r6->defined = false; - return false; -} - -void -add_route_to_option_list (struct route_option_list *l, - const char *network, - const char *netmask, - const char *gateway, - const char *metric) -{ - struct route_option *ro; - if (l->n >= l->capacity) - msg (M_FATAL, PACKAGE_NAME " ROUTE: cannot add more than %d routes -- please increase the max-routes option in the client configuration file", - l->capacity); - ro = &l->routes[l->n]; - ro->network = network; - ro->netmask = netmask; - ro->gateway = gateway; - ro->metric = metric; - ++l->n; -} - -void -add_route_ipv6_to_option_list (struct route_ipv6_option_list *l, - const char *prefix, - const char *gateway, - const char *metric) -{ - struct route_ipv6_option *ro; - if (l->n >= l->capacity) - msg (M_FATAL, PACKAGE_NAME " ROUTE: cannot add more than %d IPv6 routes -- please increase the max-routes option in the client configuration file", - l->capacity); - ro = &l->routes_ipv6[l->n]; - ro->prefix = prefix; - ro->gateway = gateway; - ro->metric = metric; - ++l->n; -} - -void -clear_route_list (struct route_list *rl) -{ - const int capacity = rl->capacity; - const size_t rl_size = array_mult_safe (sizeof(struct route), capacity, sizeof(struct route_list)); - memset(rl, 0, rl_size); - rl->capacity = capacity; -} - -void -clear_route_ipv6_list (struct route_ipv6_list *rl6) -{ - const int capacity = rl6->capacity; - const size_t rl6_size = array_mult_safe (sizeof(struct route_ipv6), capacity, sizeof(struct route_ipv6_list)); - memset(rl6, 0, rl6_size); - rl6->capacity = capacity; -} - -void -route_list_add_vpn_gateway (struct route_list *rl, - struct env_set *es, - const in_addr_t addr) -{ - rl->spec.remote_endpoint = addr; - rl->spec.flags |= RTSA_REMOTE_ENDPOINT; - setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1); -} - -static void -add_block_local_item (struct route_list *rl, - const struct route_gateway_address *gateway, - in_addr_t target) -{ - const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED); - if ((rl->rgi.flags & rgi_needed) == rgi_needed - && rl->rgi.gateway.netmask < 0xFFFFFFFF - && (rl->n)+2 <= rl->capacity) - { - struct route r; - unsigned int l2; - - /* split a route into two smaller blocking routes, and direct them to target */ - CLEAR(r); - r.flags = RT_DEFINED; - r.gateway = target; - r.network = gateway->addr & gateway->netmask; - l2 = ((~gateway->netmask)+1)>>1; - r.netmask = ~(l2-1); - rl->routes[rl->n++] = r; - r.network += l2; - rl->routes[rl->n++] = r; - } -} - -static void -add_block_local (struct route_list *rl) -{ - const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED); - if ((rl->flags & RG_BLOCK_LOCAL) - && (rl->rgi.flags & rgi_needed) == rgi_needed - && (rl->spec.flags & RTSA_REMOTE_ENDPOINT) - && rl->spec.remote_host_local != TLA_LOCAL) - { - size_t i; - - /* add bypass for gateway addr */ - add_bypass_address (&rl->spec.bypass, rl->rgi.gateway.addr); - - /* block access to local subnet */ - add_block_local_item (rl, &rl->rgi.gateway, rl->spec.remote_endpoint); - - /* process additional subnets on gateway interface */ - for (i = 0; i < rl->rgi.n_addrs; ++i) - { - const struct route_gateway_address *gwa = &rl->rgi.addrs[i]; - /* omit the add/subnet in &rl->rgi which we processed above */ - if (!((rl->rgi.gateway.addr & rl->rgi.gateway.netmask) == (gwa->addr & gwa->netmask) - && rl->rgi.gateway.netmask == gwa->netmask)) - add_block_local_item (rl, gwa, rl->spec.remote_endpoint); - } - } -} - -bool -init_route_list (struct route_list *rl, - const struct route_option_list *opt, - const char *remote_endpoint, - int default_metric, - in_addr_t remote_host, - struct env_set *es) -{ - struct gc_arena gc = gc_new (); - bool ret = true; - - clear_route_list (rl); - - rl->flags = opt->flags; - - if (remote_host) - { - rl->spec.remote_host = remote_host; - rl->spec.flags |= RTSA_REMOTE_HOST; - } - - if (default_metric) - { - rl->spec.default_metric = default_metric; - rl->spec.flags |= RTSA_DEFAULT_METRIC; - } - - get_default_gateway (&rl->rgi); - if (rl->rgi.flags & RGI_ADDR_DEFINED) - { - setenv_route_addr (es, "net_gateway", rl->rgi.gateway.addr, -1); -#ifdef ENABLE_DEBUG - print_default_gateway (D_ROUTE, &rl->rgi); -#endif - } - else - { - dmsg (D_ROUTE, "ROUTE: default_gateway=UNDEF"); - } - - if (rl->spec.flags & RTSA_REMOTE_HOST) - rl->spec.remote_host_local = test_local_addr (remote_host, &rl->rgi); - - if (is_route_parm_defined (remote_endpoint)) - { - bool defined = false; - rl->spec.remote_endpoint = getaddr ( - GETADDR_RESOLVE - | GETADDR_HOST_ORDER - | GETADDR_WARN_ON_SIGNAL, - remote_endpoint, - 0, - &defined, - NULL); - - if (defined) - { - setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1); - rl->spec.flags |= RTSA_REMOTE_ENDPOINT; - } - else - { - msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s", - remote_endpoint); - ret = false; - } - } - - if (rl->flags & RG_ENABLE) - { - add_block_local (rl); - get_bypass_addresses (&rl->spec.bypass, rl->flags); -#ifdef ENABLE_DEBUG - print_bypass_addresses (&rl->spec.bypass); -#endif - } - - /* parse the routes from opt to rl */ - { - int i = 0; - int j = rl->n; - bool warned = false; - for (i = 0; i < opt->n; ++i) - { - struct addrinfo* netlist; - struct route r; - - if (!init_route (&r, - &netlist, - &opt->routes[i], - rl)) - ret = false; - else - { - struct addrinfo* curele; - for (curele = netlist; curele; curele = curele->ai_next) - { - if (j < rl->capacity) - { - r.network = ntohl(((struct sockaddr_in*)(curele)->ai_addr)->sin_addr.s_addr); - rl->routes[j++] = r; - } - else - { - if (!warned) - { - msg (M_WARN, PACKAGE_NAME " ROUTE: routes dropped because number of expanded routes is greater than route list capacity (%d)", rl->capacity); - warned = true; - } - } - } - freeaddrinfo(netlist); - } - } - rl->n = j; - } - - gc_free (&gc); - return ret; -} - -bool -init_route_ipv6_list (struct route_ipv6_list *rl6, - const struct route_ipv6_option_list *opt6, - const char *remote_endpoint, - int default_metric, - struct env_set *es) -{ - struct gc_arena gc = gc_new (); - bool ret = true; - - clear_route_ipv6_list (rl6); - - rl6->flags = opt6->flags; - - if (default_metric >= 0 ) - { - rl6->default_metric = default_metric; - rl6->default_metric_defined = true; - } - - /* "default_gateway" is stuff for "redirect-gateway", which we don't - * do for IPv6 yet -> TODO - */ - { - dmsg (D_ROUTE, "ROUTE6: default_gateway=UNDEF"); - } - - if ( is_route_parm_defined( remote_endpoint )) - { - if ( inet_pton( AF_INET6, remote_endpoint, - &rl6->remote_endpoint_ipv6) == 1 ) - { - rl6->remote_endpoint_defined = true; - } - else - { - msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s", remote_endpoint); - ret = false; - } - } - else - rl6->remote_endpoint_defined = false; - - - if (!(opt6->n >= 0 && opt6->n <= rl6->capacity)) - msg (M_FATAL, PACKAGE_NAME " ROUTE6: (init) number of route options (%d) is greater than route list capacity (%d)", opt6->n, rl6->capacity); - - /* parse the routes from opt to rl6 */ - { - int i, j = 0; - for (i = 0; i < opt6->n; ++i) - { - if (!init_route_ipv6 (&rl6->routes_ipv6[j], - &opt6->routes_ipv6[i], - rl6 )) - ret = false; - else - ++j; - } - rl6->n = j; - } - - gc_free (&gc); - return ret; -} - -static void -add_route3 (in_addr_t network, - in_addr_t netmask, - in_addr_t gateway, - const struct tuntap *tt, - unsigned int flags, - const struct route_gateway_info *rgi, - const struct env_set *es) -{ - struct route r; - CLEAR (r); - r.flags = RT_DEFINED; - r.network = network; - r.netmask = netmask; - r.gateway = gateway; - add_route (&r, tt, flags, rgi, es); -} - -static void -del_route3 (in_addr_t network, - in_addr_t netmask, - in_addr_t gateway, - const struct tuntap *tt, - unsigned int flags, - const struct route_gateway_info *rgi, - const struct env_set *es) -{ - struct route r; - CLEAR (r); - r.flags = RT_DEFINED|RT_ADDED; - r.network = network; - r.netmask = netmask; - r.gateway = gateway; - delete_route (&r, tt, flags, rgi, es); -} - -static void -add_bypass_routes (struct route_bypass *rb, - in_addr_t gateway, - const struct tuntap *tt, - unsigned int flags, - const struct route_gateway_info *rgi, - const struct env_set *es) -{ - int i; - for (i = 0; i < rb->n_bypass; ++i) - { - if (rb->bypass[i]) - add_route3 (rb->bypass[i], - IPV4_NETMASK_HOST, - gateway, - tt, - flags | ROUTE_REF_GW, - rgi, - es); - } -} - -static void -del_bypass_routes (struct route_bypass *rb, - in_addr_t gateway, - const struct tuntap *tt, - unsigned int flags, - const struct route_gateway_info *rgi, - const struct env_set *es) -{ - int i; - for (i = 0; i < rb->n_bypass; ++i) - { - if (rb->bypass[i]) - del_route3 (rb->bypass[i], - IPV4_NETMASK_HOST, - gateway, - tt, - flags | ROUTE_REF_GW, - rgi, - es); - } -} - -static void -redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es) -{ - const char err[] = "NOTE: unable to redirect default gateway --"; - - if ( rl && rl->flags & RG_ENABLE ) - { - if (!(rl->spec.flags & RTSA_REMOTE_ENDPOINT)) - { - msg (M_WARN, "%s VPN gateway parameter (--route-gateway or --ifconfig) is missing", err); - } - else if (!(rl->rgi.flags & RGI_ADDR_DEFINED)) - { - msg (M_WARN, "%s Cannot read current default gateway from system", err); - } - else if (!(rl->spec.flags & RTSA_REMOTE_HOST)) - { - msg (M_WARN, "%s Cannot obtain current remote host address", err); - } - else - { - bool local = BOOL_CAST(rl->flags & RG_LOCAL); - if (rl->flags & RG_AUTO_LOCAL) { - const int tla = rl->spec.remote_host_local; - if (tla == TLA_NONLOCAL) - { - dmsg (D_ROUTE, "ROUTE remote_host is NOT LOCAL"); - local = false; - } - else if (tla == TLA_LOCAL) - { - dmsg (D_ROUTE, "ROUTE remote_host is LOCAL"); - local = true; - } - } - if (!local) - { - /* route remote host to original default gateway */ - /* if remote_host is not ipv4 (ie: ipv6), just skip - * adding this special /32 route */ - if (rl->spec.remote_host != IPV4_INVALID_ADDR) { - add_route3 (rl->spec.remote_host, - IPV4_NETMASK_HOST, - rl->rgi.gateway.addr, - tt, - flags | ROUTE_REF_GW, - &rl->rgi, - es); - rl->iflags |= RL_DID_LOCAL; - } else { - dmsg (D_ROUTE, "ROUTE remote_host protocol differs from tunneled"); - } - } - - /* route DHCP/DNS server traffic through original default gateway */ - add_bypass_routes (&rl->spec.bypass, rl->rgi.gateway.addr, tt, flags, &rl->rgi, es); - - if (rl->flags & RG_REROUTE_GW) - { - if (rl->flags & RG_DEF1) - { - /* add new default route (1st component) */ - add_route3 (0x00000000, - 0x80000000, - rl->spec.remote_endpoint, - tt, - flags, - &rl->rgi, - es); - - /* add new default route (2nd component) */ - add_route3 (0x80000000, - 0x80000000, - rl->spec.remote_endpoint, - tt, - flags, - &rl->rgi, - es); - } - else - { - /* delete default route */ - del_route3 (0, - 0, - rl->rgi.gateway.addr, - tt, - flags | ROUTE_REF_GW, - &rl->rgi, - es); - - /* add new default route */ - add_route3 (0, - 0, - rl->spec.remote_endpoint, - tt, - flags, - &rl->rgi, - es); - } - } - - /* set a flag so we can undo later */ - rl->iflags |= RL_DID_REDIRECT_DEFAULT_GATEWAY; - } - } -} - -static void -undo_redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es) -{ - if ( rl && rl->iflags & RL_DID_REDIRECT_DEFAULT_GATEWAY ) - { - /* delete remote host route */ - if (rl->iflags & RL_DID_LOCAL) - { - del_route3 (rl->spec.remote_host, - IPV4_NETMASK_HOST, - rl->rgi.gateway.addr, - tt, - flags | ROUTE_REF_GW, - &rl->rgi, - es); - rl->iflags &= ~RL_DID_LOCAL; - } - - /* delete special DHCP/DNS bypass route */ - del_bypass_routes (&rl->spec.bypass, rl->rgi.gateway.addr, tt, flags, &rl->rgi, es); - - if (rl->flags & RG_REROUTE_GW) - { - if (rl->flags & RG_DEF1) - { - /* delete default route (1st component) */ - del_route3 (0x00000000, - 0x80000000, - rl->spec.remote_endpoint, - tt, - flags, - &rl->rgi, - es); - - /* delete default route (2nd component) */ - del_route3 (0x80000000, - 0x80000000, - rl->spec.remote_endpoint, - tt, - flags, - &rl->rgi, - es); - } - else - { - /* delete default route */ - del_route3 (0, - 0, - rl->spec.remote_endpoint, - tt, - flags, - &rl->rgi, - es); - - /* restore original default route */ - add_route3 (0, - 0, - rl->rgi.gateway.addr, - tt, - flags | ROUTE_REF_GW, - &rl->rgi, - es); - } - } - - rl->iflags &= ~RL_DID_REDIRECT_DEFAULT_GATEWAY; - } -} - -void -add_routes (struct route_list *rl, struct route_ipv6_list *rl6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) -{ - redirect_default_route_to_vpn (rl, tt, flags, es); - if ( rl && !(rl->iflags & RL_ROUTES_ADDED) ) - { - int i; - -#ifdef ENABLE_MANAGEMENT - if (management && rl->n) - { - management_set_state (management, - OPENVPN_STATE_ADD_ROUTES, - NULL, - 0, - 0); - } -#endif - - for (i = 0; i < rl->n; ++i) - { - struct route *r = &rl->routes[i]; - check_subnet_conflict (r->network, r->netmask, "route"); - if (flags & ROUTE_DELETE_FIRST) - delete_route (r, tt, flags, &rl->rgi, es); - add_route (r, tt, flags, &rl->rgi, es); - } - rl->iflags |= RL_ROUTES_ADDED; - } - if (rl6 && !rl6->routes_added) - { - int i; - - for (i = 0; i < rl6->n; ++i) - { - struct route_ipv6 *r = &rl6->routes_ipv6[i]; - if (flags & ROUTE_DELETE_FIRST) - delete_route_ipv6 (r, tt, flags, es); - add_route_ipv6 (r, tt, flags, es); - } - rl6->routes_added = true; - } -} - -void -delete_routes (struct route_list *rl, struct route_ipv6_list *rl6, - const struct tuntap *tt, unsigned int flags, const struct env_set *es) -{ - if ( rl && rl->iflags & RL_ROUTES_ADDED ) - { - int i; - for (i = rl->n - 1; i >= 0; --i) - { - struct route * r = &rl->routes[i]; - delete_route (r, tt, flags, &rl->rgi, es); - } - rl->iflags &= ~RL_ROUTES_ADDED; - } - - undo_redirect_default_route_to_vpn (rl, tt, flags, es); - - if ( rl ) - { - clear_route_list (rl); - } - - if ( rl6 && rl6->routes_added ) - { - int i; - for (i = rl6->n - 1; i >= 0; --i) - { - const struct route_ipv6 *r6 = &rl6->routes_ipv6[i]; - delete_route_ipv6 (r6, tt, flags, es); - } - rl6->routes_added = false; - } - - if ( rl6 ) - { - clear_route_ipv6_list (rl6); - } -} - -#ifdef ENABLE_DEBUG - -static const char * -show_opt (const char *option) -{ - if (!option) - return "nil"; - else - return option; -} - -static void -print_route_option (const struct route_option *ro, int level) -{ - msg (level, " route %s/%s/%s/%s", - show_opt (ro->network), - show_opt (ro->netmask), - show_opt (ro->gateway), - show_opt (ro->metric)); -} - -void -print_route_options (const struct route_option_list *rol, - int level) -{ - int i; - if (rol->flags & RG_ENABLE) - msg (level, " [redirect_default_gateway local=%d]", - (rol->flags & RG_LOCAL) != 0); - for (i = 0; i < rol->n; ++i) - print_route_option (&rol->routes[i], level); -} - -void -print_default_gateway(const int msglevel, const struct route_gateway_info *rgi) -{ - struct gc_arena gc = gc_new (); - if (rgi->flags & RGI_ADDR_DEFINED) - { - struct buffer out = alloc_buf_gc (256, &gc); - buf_printf (&out, "ROUTE_GATEWAY"); - if (rgi->flags & RGI_ON_LINK) - buf_printf (&out, " ON_LINK"); - else - buf_printf (&out, " %s", print_in_addr_t (rgi->gateway.addr, 0, &gc)); - if (rgi->flags & RGI_NETMASK_DEFINED) - buf_printf (&out, "/%s", print_in_addr_t (rgi->gateway.netmask, 0, &gc)); -#ifdef WIN32 - if (rgi->flags & RGI_IFACE_DEFINED) - buf_printf (&out, " I=%u", (unsigned int)rgi->adapter_index); -#else - if (rgi->flags & RGI_IFACE_DEFINED) - buf_printf (&out, " IFACE=%s", rgi->iface); -#endif - if (rgi->flags & RGI_HWADDR_DEFINED) - buf_printf (&out, " HWADDR=%s", format_hex_ex (rgi->hwaddr, 6, 0, 1, ":", &gc)); - msg (msglevel, "%s", BSTR (&out)); - } - gc_free (&gc); -} - -#endif - -static void -print_route (const struct route *r, int level) -{ - struct gc_arena gc = gc_new (); - if (r->flags & RT_DEFINED) - msg (level, "%s", route_string (r, &gc)); - gc_free (&gc); -} - -void -print_routes (const struct route_list *rl, int level) -{ - int i; - for (i = 0; i < rl->n; ++i) - print_route (&rl->routes[i], level); -} - -static void -setenv_route (struct env_set *es, const struct route *r, int i) -{ - struct gc_arena gc = gc_new (); - if (r->flags & RT_DEFINED) - { - setenv_route_addr (es, "network", r->network, i); - setenv_route_addr (es, "netmask", r->netmask, i); - setenv_route_addr (es, "gateway", r->gateway, i); - - if (r->flags & RT_METRIC_DEFINED) - { - struct buffer name = alloc_buf_gc (256, &gc); - buf_printf (&name, "route_metric_%d", i); - setenv_int (es, BSTR (&name), r->metric); - } - } - gc_free (&gc); -} - -void -setenv_routes (struct env_set *es, const struct route_list *rl) -{ - int i; - for (i = 0; i < rl->n; ++i) - setenv_route (es, &rl->routes[i], i + 1); -} - -static void -setenv_route_ipv6 (struct env_set *es, const struct route_ipv6 *r6, int i) -{ - struct gc_arena gc = gc_new (); - if (r6->defined) - { - struct buffer name1 = alloc_buf_gc( 256, &gc ); - struct buffer val = alloc_buf_gc( 256, &gc ); - struct buffer name2 = alloc_buf_gc( 256, &gc ); - - buf_printf( &name1, "route_ipv6_network_%d", i ); - buf_printf( &val, "%s/%d", print_in6_addr( r6->network, 0, &gc ), - r6->netbits ); - setenv_str( es, BSTR(&name1), BSTR(&val) ); - - buf_printf( &name2, "route_ipv6_gateway_%d", i ); - setenv_str( es, BSTR(&name2), print_in6_addr( r6->gateway, 0, &gc )); - } - gc_free (&gc); -} -void -setenv_routes_ipv6 (struct env_set *es, const struct route_ipv6_list *rl6) -{ - int i; - for (i = 0; i < rl6->n; ++i) - setenv_route_ipv6 (es, &rl6->routes_ipv6[i], i + 1); -} - -/* - * local_route() determines whether the gateway of a provided host - * route is on the same interface that owns the default gateway. - * It uses the data structure - * returned by get_default_gateway() (struct route_gateway_info) - * to determine this. If the route is local, LR_MATCH is returned. - * When adding routes into the kernel, if LR_MATCH is defined for - * a given route, the route should explicitly reference the default - * gateway interface as the route destination. For example, here - * is an example on Linux that uses LR_MATCH: - * - * route add -net 10.10.0.1 netmask 255.255.255.255 dev eth0 - * - * This capability is needed by the "default-gateway block-local" - * directive, to allow client access to the local subnet to be - * blocked but still allow access to the local default gateway. - */ - -/* local_route() return values */ -#define LR_NOMATCH 0 /* route is not local */ -#define LR_MATCH 1 /* route is local */ -#define LR_ERROR 2 /* caller should abort adding route */ - -static int -local_route (in_addr_t network, - in_addr_t netmask, - in_addr_t gateway, - const struct route_gateway_info *rgi) -{ - /* set LR_MATCH on local host routes */ - const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED|RGI_IFACE_DEFINED); - if (rgi - && (rgi->flags & rgi_needed) == rgi_needed - && gateway == rgi->gateway.addr - && netmask == 0xFFFFFFFF) - { - if (((network ^ rgi->gateway.addr) & rgi->gateway.netmask) == 0) - return LR_MATCH; - else - { - /* examine additional subnets on gateway interface */ - size_t i; - for (i = 0; i < rgi->n_addrs; ++i) - { - const struct route_gateway_address *gwa = &rgi->addrs[i]; - if (((network ^ gwa->addr) & gwa->netmask) == 0) - return LR_MATCH; - } - } - } - return LR_NOMATCH; -} - -/* Return true if the "on-link" form of the route should be used. This is when the gateway for a - a route is specified as an interface rather than an address. */ -static inline bool -is_on_link (const int is_local_route, const unsigned int flags, const struct route_gateway_info *rgi) -{ - return rgi && (is_local_route == LR_MATCH || ((flags & ROUTE_REF_GW) && (rgi->flags & RGI_ON_LINK))); -} - -void -add_route (struct route *r, - const struct tuntap *tt, - unsigned int flags, - const struct route_gateway_info *rgi, /* may be NULL */ - const struct env_set *es) -{ - struct gc_arena gc; - struct argv argv; - const char *network; - const char *netmask; - const char *gateway; - bool status = false; - int is_local_route; - - if (!(r->flags & RT_DEFINED)) - return; - - gc_init (&gc); - argv_init (&argv); - - network = print_in_addr_t (r->network, 0, &gc); - netmask = print_in_addr_t (r->netmask, 0, &gc); - gateway = print_in_addr_t (r->gateway, 0, &gc); - - is_local_route = local_route(r->network, r->netmask, r->gateway, rgi); - if (is_local_route == LR_ERROR) - goto done; - -#if defined(TARGET_LINUX) -#ifdef ENABLE_IPROUTE - /* FIXME -- add on-link support for ENABLE_IPROUTE */ - argv_printf (&argv, "%s route add %s/%d via %s", - iproute_path, - network, - count_netmask_bits(netmask), - gateway); - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "metric %d", r->metric); - -#else - argv_printf (&argv, "%s add -net %s netmask %s", - ROUTE_PATH, - network, - netmask); - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "metric %d", r->metric); - if (is_on_link (is_local_route, flags, rgi)) - argv_printf_cat (&argv, "dev %s", rgi->iface); - else - argv_printf_cat (&argv, "gw %s", gateway); - -#endif /*ENABLE_IPROUTE*/ - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route add command failed"); - -#elif defined (TARGET_ANDROID) - - struct user_pass up; - struct buffer out = alloc_buf_gc (64, &gc); - - buf_printf (&out, "%s %s", network, netmask); - - strcpy(up.username, buf_bptr(&out)); - management_query_user_pass(management, &up , "ROUTE", GET_USER_PASS_NEED_OK,(void*) 0); - - -#elif defined (WIN32) - { - DWORD ai = TUN_ADAPTER_INDEX_INVALID; - argv_printf (&argv, "%s%sc ADD %s MASK %s %s", - get_win_sys_path(), - WIN_ROUTE_PATH_SUFFIX, - network, - netmask, - gateway); - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "METRIC %d", r->metric); - if (is_on_link (is_local_route, flags, rgi)) - { - ai = rgi->adapter_index; - argv_printf_cat (&argv, "IF %u", (unsigned int)ai); - } - - argv_msg (D_ROUTE, &argv); - - if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI) - { - status = add_route_ipapi (r, tt, ai); - msg (D_ROUTE, "Route addition via IPAPI %s", status ? "succeeded" : "failed"); - } - else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE) - { - netcmd_semaphore_lock (); - status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed"); - netcmd_semaphore_release (); - } - else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE) - { - status = add_route_ipapi (r, tt, ai); - msg (D_ROUTE, "Route addition via IPAPI %s [adaptive]", status ? "succeeded" : "failed"); - if (!status) - { - msg (D_ROUTE, "Route addition fallback to route.exe"); - netcmd_semaphore_lock (); - status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed [adaptive]"); - netcmd_semaphore_release (); - } - } - else - { - ASSERT (0); - } - } - -#elif defined (TARGET_SOLARIS) - - /* example: route add 192.0.2.32 -netmask 255.255.255.224 somegateway */ - - argv_printf (&argv, "%s add", - ROUTE_PATH); - -#if 0 - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "-rtt %d", r->metric); -#endif - - argv_printf_cat (&argv, "%s -netmask %s %s", - network, - netmask, - gateway); - - /* FIXME -- add on-link support for Solaris */ - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add command failed"); - -#elif defined(TARGET_FREEBSD) - - argv_printf (&argv, "%s add", - ROUTE_PATH); - -#if 0 - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "-rtt %d", r->metric); -#endif - - argv_printf_cat (&argv, "-net %s %s %s", - network, - gateway, - netmask); - - /* FIXME -- add on-link support for FreeBSD */ - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route add command failed"); - -#elif defined(TARGET_DRAGONFLY) - - argv_printf (&argv, "%s add", - ROUTE_PATH); - -#if 0 - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "-rtt %d", r->metric); -#endif - - argv_printf_cat (&argv, "-net %s %s %s", - network, - gateway, - netmask); - - /* FIXME -- add on-link support for Dragonfly */ - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route add command failed"); - -#elif defined(TARGET_DARWIN) - - argv_printf (&argv, "%s add", - ROUTE_PATH); - -#if 0 - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "-rtt %d", r->metric); -#endif - - if (is_on_link (is_local_route, flags, rgi)) - { - /* Mac OS X route syntax for ON_LINK: - route add -cloning -net 10.10.0.1 -netmask 255.255.255.255 -interface en0 */ - argv_printf_cat (&argv, "-cloning -net %s -netmask %s -interface %s", - network, - netmask, - rgi->iface); - } - else - { - argv_printf_cat (&argv, "-net %s %s %s", - network, - gateway, - netmask); - } - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: OS X route add command failed"); - -#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) - - argv_printf (&argv, "%s add", - ROUTE_PATH); - -#if 0 - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "-rtt %d", r->metric); -#endif - - argv_printf_cat (&argv, "-net %s %s -netmask %s", - network, - gateway, - netmask); - - /* FIXME -- add on-link support for OpenBSD/NetBSD */ - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route add command failed"); - -#else - msg (M_FATAL, "Sorry, but I don't know how to do 'route' commands on this operating system. Try putting your routes in a --route-up script"); -#endif - - done: - if (status) - r->flags |= RT_ADDED; - else - r->flags &= ~RT_ADDED; - argv_reset (&argv); - gc_free (&gc); -} - - -static const char * -print_in6_addr_netbits_only( struct in6_addr network_copy, int netbits, - struct gc_arena * gc) -{ - /* clear host bit parts of route - * (needed if routes are specified improperly, or if we need to - * explicitely setup/clear the "connected" network routes on some OSes) - */ - int byte = 15; - int bits_to_clear = 128 - netbits; - - while( byte >= 0 && bits_to_clear > 0 ) - { - if ( bits_to_clear >= 8 ) - { network_copy.s6_addr[byte--] = 0; bits_to_clear -= 8; } - else - { network_copy.s6_addr[byte--] &= (0xff << bits_to_clear); bits_to_clear = 0; } - } - - return print_in6_addr( network_copy, 0, gc); -} - -void -add_route_ipv6 (struct route_ipv6 *r6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) -{ - struct gc_arena gc; - struct argv argv; - - const char *network; - const char *gateway; - bool status = false; - const char *device = tt->actual_name; - - bool gateway_needed = false; - - if (!r6->defined) - return; - - gc_init (&gc); - argv_init (&argv); - - network = print_in6_addr_netbits_only( r6->network, r6->netbits, &gc); - gateway = print_in6_addr( r6->gateway, 0, &gc); - - if ( !tt->ipv6 ) - { - msg( M_INFO, "add_route_ipv6(): not adding %s/%d, no IPv6 on if %s", - network, r6->netbits, device ); - return; - } - - msg( M_INFO, "add_route_ipv6(%s/%d -> %s metric %d) dev %s", - network, r6->netbits, gateway, r6->metric, device ); - - /* - * Filter out routes which are essentially no-ops - * (not currently done for IPv6) - */ - - /* On "tun" interface, we never set a gateway if the operating system - * can do "route to interface" - it does not add value, as the target - * dev already fully qualifies the route destination on point-to-point - * interfaces. OTOH, on "tap" interface, we must always set the - * gateway unless the route is to be an on-link network - */ - if ( tt->type == DEV_TYPE_TAP && - !(r6->metric_defined && r6->metric == 0 ) ) - { - gateway_needed = true; - } - -#if defined(TARGET_LINUX) -#ifdef ENABLE_IPROUTE - argv_printf (&argv, "%s -6 route add %s/%d dev %s", - iproute_path, - network, - r6->netbits, - device); - if (gateway_needed) - argv_printf_cat (&argv, "via %s", gateway); - if (r6->metric_defined && r6->metric > 0 ) - argv_printf_cat (&argv, " metric %d", r6->metric); - -#else - argv_printf (&argv, "%s -A inet6 add %s/%d dev %s", - ROUTE_PATH, - network, - r6->netbits, - device); - if (gateway_needed) - argv_printf_cat (&argv, "gw %s", gateway); - if (r6->metric_defined && r6->metric > 0 ) - argv_printf_cat (&argv, " metric %d", r6->metric); -#endif /*ENABLE_IPROUTE*/ - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route -6/-A inet6 add command failed"); - -#elif defined (TARGET_ANDROID) - struct user_pass up; - struct buffer out = alloc_buf_gc (64, &gc); - - buf_printf (&out, "%s/%d", network, r6->netbits); - - strcpy(up.username, buf_bptr(&out)); - management_query_user_pass(management, &up , "ROUTE6", GET_USER_PASS_NEED_OK,(void*) 0); - -#elif defined (WIN32) - - /* netsh interface ipv6 add route 2001:db8::/32 MyTunDevice */ - argv_printf (&argv, "%s%sc interface ipv6 add route %s/%d %s", - get_win_sys_path(), - NETSH_PATH_SUFFIX, - network, - r6->netbits, - device); - - /* next-hop depends on TUN or TAP mode: - * - in TAP mode, we use the "real" next-hop - * - in TUN mode we use a special-case link-local address that the tapdrvr - * knows about and will answer ND (neighbor discovery) packets for - */ - if ( tt->type == DEV_TYPE_TUN ) - argv_printf_cat( &argv, " %s", "fe80::8" ); - else - argv_printf_cat( &argv, " %s", gateway ); - -#if 0 - if (r->metric_defined) - argv_printf_cat (&argv, " METRIC %d", r->metric); -#endif - - /* in some versions of Windows, routes are persistent across reboots by - * default, unless "store=active" is set (pointed out by Tony Lim, thanks) - */ - argv_printf_cat( &argv, " store=active" ); - - argv_msg (D_ROUTE, &argv); - - netcmd_semaphore_lock (); - status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add ipv6 command failed"); - netcmd_semaphore_release (); - -#elif defined (TARGET_SOLARIS) - - /* example: route add -inet6 2001:db8::/32 somegateway 0 */ - - /* for some weird reason, this does not work for me unless I set - * "metric 0" - otherwise, the routes will be nicely installed, but - * packets will just disappear somewhere. So we use "0" now... - */ - - argv_printf (&argv, "%s add -inet6 %s/%d %s 0", - ROUTE_PATH, - network, - r6->netbits, - gateway ); - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add -inet6 command failed"); - -#elif defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) - - argv_printf (&argv, "%s add -inet6 %s/%d", - ROUTE_PATH, - network, - r6->netbits); - - if (gateway_needed) - argv_printf_cat (&argv, "%s", gateway); - else - argv_printf_cat (&argv, "-iface %s", device); - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: *BSD route add -inet6 command failed"); - -#elif defined(TARGET_DARWIN) - - argv_printf (&argv, "%s add -inet6 %s -prefixlen %d", - ROUTE_PATH, - network, r6->netbits ); - - if (gateway_needed) - argv_printf_cat (&argv, "%s", gateway); - else - argv_printf_cat (&argv, "-iface %s", device); - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: MacOS X route add -inet6 command failed"); - -#elif defined(TARGET_OPENBSD) - - argv_printf (&argv, "%s add -inet6 %s -prefixlen %d %s", - ROUTE_PATH, - network, r6->netbits, gateway ); - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD route add -inet6 command failed"); - -#elif defined(TARGET_NETBSD) - - argv_printf (&argv, "%s add -inet6 %s/%d %s", - ROUTE_PATH, - network, r6->netbits, gateway ); - - argv_msg (D_ROUTE, &argv); - status = openvpn_execve_check (&argv, es, 0, "ERROR: NetBSD route add -inet6 command failed"); - -#else - msg (M_FATAL, "Sorry, but I don't know how to do 'route ipv6' commands on this operating system. Try putting your routes in a --route-up script"); -#endif - - r6->defined = status; - argv_reset (&argv); - gc_free (&gc); -} - -static void -delete_route (struct route *r, - const struct tuntap *tt, - unsigned int flags, - const struct route_gateway_info *rgi, - const struct env_set *es) -{ - struct gc_arena gc; - struct argv argv; - const char *network; - const char *netmask; - const char *gateway; - int is_local_route; - - if ((r->flags & (RT_DEFINED|RT_ADDED)) != (RT_DEFINED|RT_ADDED)) - return; - - gc_init (&gc); - argv_init (&argv); - - network = print_in_addr_t (r->network, 0, &gc); - netmask = print_in_addr_t (r->netmask, 0, &gc); - gateway = print_in_addr_t (r->gateway, 0, &gc); - - is_local_route = local_route(r->network, r->netmask, r->gateway, rgi); - if (is_local_route == LR_ERROR) - goto done; - -#if defined(TARGET_LINUX) -#ifdef ENABLE_IPROUTE - argv_printf (&argv, "%s route del %s/%d", - iproute_path, - network, - count_netmask_bits(netmask)); -#else - argv_printf (&argv, "%s del -net %s netmask %s", - ROUTE_PATH, - network, - netmask); -#endif /*ENABLE_IPROUTE*/ - if (r->flags & RT_METRIC_DEFINED) - argv_printf_cat (&argv, "metric %d", r->metric); - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: Linux route delete command failed"); - -#elif defined (WIN32) - - argv_printf (&argv, "%s%sc DELETE %s MASK %s %s", - get_win_sys_path(), - WIN_ROUTE_PATH_SUFFIX, - network, - netmask, - gateway); - - argv_msg (D_ROUTE, &argv); - - if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI) - { - const bool status = del_route_ipapi (r, tt); - msg (D_ROUTE, "Route deletion via IPAPI %s", status ? "succeeded" : "failed"); - } - else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE) - { - netcmd_semaphore_lock (); - openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed"); - netcmd_semaphore_release (); - } - else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE) - { - const bool status = del_route_ipapi (r, tt); - msg (D_ROUTE, "Route deletion via IPAPI %s [adaptive]", status ? "succeeded" : "failed"); - if (!status) - { - msg (D_ROUTE, "Route deletion fallback to route.exe"); - netcmd_semaphore_lock (); - openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed [adaptive]"); - netcmd_semaphore_release (); - } - } - else - { - ASSERT (0); - } - -#elif defined (TARGET_SOLARIS) - - argv_printf (&argv, "%s delete %s -netmask %s %s", - ROUTE_PATH, - network, - netmask, - gateway); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete command failed"); - -#elif defined(TARGET_FREEBSD) - - argv_printf (&argv, "%s delete -net %s %s %s", - ROUTE_PATH, - network, - gateway, - netmask); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route delete command failed"); - -#elif defined(TARGET_DRAGONFLY) - - argv_printf (&argv, "%s delete -net %s %s %s", - ROUTE_PATH, - network, - gateway, - netmask); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route delete command failed"); - -#elif defined(TARGET_DARWIN) - - if (is_on_link (is_local_route, flags, rgi)) - { - argv_printf (&argv, "%s delete -cloning -net %s -netmask %s -interface %s", - ROUTE_PATH, - network, - netmask, - rgi->iface); - } - else - { - argv_printf (&argv, "%s delete -net %s %s %s", - ROUTE_PATH, - network, - gateway, - netmask); - } - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: OS X route delete command failed"); - -#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) - - argv_printf (&argv, "%s delete -net %s %s -netmask %s", - ROUTE_PATH, - network, - gateway, - netmask); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route delete command failed"); -#elif defined(TARGET_ANDROID) - msg (M_NONFATAL, "Sorry, deleting routes on Android is not possible. The VpnService API allows routes to be set on connect only."); -#else - msg (M_FATAL, "Sorry, but I don't know how to do 'route' commands on this operating system. Try putting your routes in a --route-up script"); -#endif - - done: - r->flags &= ~RT_ADDED; - argv_reset (&argv); - gc_free (&gc); -} - -void -delete_route_ipv6 (const struct route_ipv6 *r6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) -{ - struct gc_arena gc; - struct argv argv; - const char *network; - const char *gateway; - const char *device = tt->actual_name; - bool gateway_needed = false; - - if (!r6->defined) - return; - - gc_init (&gc); - argv_init (&argv); - - network = print_in6_addr_netbits_only( r6->network, r6->netbits, &gc); - gateway = print_in6_addr( r6->gateway, 0, &gc); - - if ( !tt->ipv6 ) - { - msg( M_INFO, "delete_route_ipv6(): not deleting %s/%d, no IPv6 on if %s", - network, r6->netbits, device ); - return; - } - - msg( M_INFO, "delete_route_ipv6(%s/%d)", network, r6->netbits ); - - /* if we used a gateway on "add route", we also need to specify it on - * delete, otherwise some OSes will refuse to delete the route - */ - if ( tt->type == DEV_TYPE_TAP && - !(r6->metric_defined && r6->metric == 0 ) ) - { - gateway_needed = true; - } - - -#if defined(TARGET_LINUX) -#ifdef ENABLE_IPROUTE - argv_printf (&argv, "%s -6 route del %s/%d dev %s", - iproute_path, - network, - r6->netbits, - device); - if (gateway_needed) - argv_printf_cat (&argv, "via %s", gateway); -#else - argv_printf (&argv, "%s -A inet6 del %s/%d dev %s", - ROUTE_PATH, - network, - r6->netbits, - device); - if (gateway_needed) - argv_printf_cat (&argv, "gw %s", gateway); - if (r6->metric_defined && r6->metric > 0 ) - argv_printf_cat (&argv, " metric %d", r6->metric); -#endif /*ENABLE_IPROUTE*/ - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: Linux route -6/-A inet6 del command failed"); - -#elif defined (WIN32) - - /* netsh interface ipv6 delete route 2001:db8::/32 MyTunDevice */ - argv_printf (&argv, "%s%sc interface ipv6 delete route %s/%d %s", - get_win_sys_path(), - NETSH_PATH_SUFFIX, - network, - r6->netbits, - device); - - /* next-hop depends on TUN or TAP mode: - * - in TAP mode, we use the "real" next-hop - * - in TUN mode we use a special-case link-local address that the tapdrvr - * knows about and will answer ND (neighbor discovery) packets for - * (and "route deletion without specifying next-hop" does not work...) - */ - if ( tt->type == DEV_TYPE_TUN ) - argv_printf_cat( &argv, " %s", "fe80::8" ); - else - argv_printf_cat( &argv, " %s", gateway ); - -#if 0 - if (r->metric_defined) - argv_printf_cat (&argv, "METRIC %d", r->metric); -#endif - - argv_msg (D_ROUTE, &argv); - - netcmd_semaphore_lock (); - openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add ipv6 command failed"); - netcmd_semaphore_release (); - -#elif defined (TARGET_SOLARIS) - - /* example: route delete -inet6 2001:db8::/32 somegateway */ - /* GERT-TODO: this is untested, but should work */ - - argv_printf (&argv, "%s delete -inet6 %s/%d %s", - ROUTE_PATH, - network, - r6->netbits, - gateway ); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete -inet6 command failed"); - -#elif defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) - - argv_printf (&argv, "%s delete -inet6 %s/%d", - ROUTE_PATH, - network, - r6->netbits ); - - if (gateway_needed) - argv_printf_cat (&argv, "%s", gateway); - else - argv_printf_cat (&argv, "-iface %s", device); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: *BSD route delete -inet6 command failed"); - -#elif defined(TARGET_DARWIN) - - argv_printf (&argv, "%s delete -inet6 %s -prefixlen %d", - ROUTE_PATH, - network, r6->netbits ); - - if (gateway_needed) - argv_printf_cat (&argv, "%s", gateway); - else - argv_printf_cat (&argv, "-iface %s", device); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: MacOS X route delete -inet6 command failed"); - -#elif defined(TARGET_OPENBSD) - - argv_printf (&argv, "%s delete -inet6 %s -prefixlen %d %s", - ROUTE_PATH, - network, r6->netbits, gateway ); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD route delete -inet6 command failed"); - -#elif defined(TARGET_NETBSD) - - argv_printf (&argv, "%s delete -inet6 %s/%d %s", - ROUTE_PATH, - network, r6->netbits, gateway ); - - argv_msg (D_ROUTE, &argv); - openvpn_execve_check (&argv, es, 0, "ERROR: NetBSD route delete -inet6 command failed"); - -#else - msg (M_FATAL, "Sorry, but I don't know how to do 'route ipv6' commands on this operating system. Try putting your routes in a --route-down script"); -#endif - - argv_reset (&argv); - gc_free (&gc); -} - -/* - * The --redirect-gateway option requires OS-specific code below - * to get the current default gateway. - */ - -#if defined(WIN32) - -static const MIB_IPFORWARDTABLE * -get_windows_routing_table (struct gc_arena *gc) -{ - ULONG size = 0; - PMIB_IPFORWARDTABLE rt = NULL; - DWORD status; - - status = GetIpForwardTable (NULL, &size, TRUE); - if (status == ERROR_INSUFFICIENT_BUFFER) - { - rt = (PMIB_IPFORWARDTABLE) gc_malloc (size, false, gc); - status = GetIpForwardTable (rt, &size, TRUE); - if (status != NO_ERROR) - { - msg (D_ROUTE, "NOTE: GetIpForwardTable returned error: %s (code=%u)", - strerror_win32 (status, gc), - (unsigned int)status); - rt = NULL; - } - } - return rt; -} - -static int -test_route (const IP_ADAPTER_INFO *adapters, - const in_addr_t gateway, - DWORD *index) -{ - int count = 0; - DWORD i = adapter_index_of_ip (adapters, gateway, &count, NULL); - if (index) - *index = i; - return count; -} - -static void -test_route_helper (bool *ret, - int *count, - int *good, - int *ambig, - const IP_ADAPTER_INFO *adapters, - const in_addr_t gateway) -{ - int c; - - ++*count; - c = test_route (adapters, gateway, NULL); - if (c == 0) - *ret = false; - else - ++*good; - if (c > 1) - ++*ambig; -} - -/* - * If we tried to add routes now, would we succeed? - */ -bool -test_routes (const struct route_list *rl, const struct tuntap *tt) -{ - struct gc_arena gc = gc_new (); - const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); - bool ret = false; - int count = 0; - int good = 0; - int ambig = 0; - bool adapter_up = false; - - if (is_adapter_up (tt, adapters)) - { - ret = true; - adapter_up = true; - - if (rl) - { - int i; - for (i = 0; i < rl->n; ++i) - test_route_helper (&ret, &count, &good, &ambig, adapters, rl->routes[i].gateway); - - if ((rl->flags & RG_ENABLE) && (rl->spec.flags & RTSA_REMOTE_ENDPOINT)) - test_route_helper (&ret, &count, &good, &ambig, adapters, rl->spec.remote_endpoint); - } - } - - msg (D_ROUTE, "TEST ROUTES: %d/%d succeeded len=%d ret=%d a=%d u/d=%s", - good, - count, - rl ? rl->n : -1, - (int)ret, - ambig, - adapter_up ? "up" : "down"); - - gc_free (&gc); - return ret; -} - -static const MIB_IPFORWARDROW * -get_default_gateway_row (const MIB_IPFORWARDTABLE *routes) -{ - struct gc_arena gc = gc_new (); - DWORD lowest_metric = MAXDWORD; - const MIB_IPFORWARDROW *ret = NULL; - int i; - int best = -1; - - if (routes) - { - for (i = 0; i < routes->dwNumEntries; ++i) - { - const MIB_IPFORWARDROW *row = &routes->table[i]; - const in_addr_t net = ntohl (row->dwForwardDest); - const in_addr_t mask = ntohl (row->dwForwardMask); - const DWORD index = row->dwForwardIfIndex; - const DWORD metric = row->dwForwardMetric1; - - dmsg (D_ROUTE_DEBUG, "GDGR: route[%d] %s/%s i=%d m=%d", - i, - print_in_addr_t ((in_addr_t) net, 0, &gc), - print_in_addr_t ((in_addr_t) mask, 0, &gc), - (int)index, - (int)metric); - - if (!net && !mask && metric < lowest_metric) - { - ret = row; - lowest_metric = metric; - best = i; - } - } - } - - dmsg (D_ROUTE_DEBUG, "GDGR: best=%d lm=%u", best, (unsigned int)lowest_metric); - - gc_free (&gc); - return ret; -} - -void -get_default_gateway (struct route_gateway_info *rgi) -{ - struct gc_arena gc = gc_new (); - - const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); - const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc); - const MIB_IPFORWARDROW *row = get_default_gateway_row (routes); - DWORD a_index; - const IP_ADAPTER_INFO *ai; - - CLEAR(*rgi); - - if (row) - { - rgi->gateway.addr = ntohl (row->dwForwardNextHop); - if (rgi->gateway.addr) - { - rgi->flags |= RGI_ADDR_DEFINED; - a_index = adapter_index_of_ip (adapters, rgi->gateway.addr, NULL, &rgi->gateway.netmask); - if (a_index != TUN_ADAPTER_INDEX_INVALID) - { - rgi->adapter_index = a_index; - rgi->flags |= (RGI_IFACE_DEFINED|RGI_NETMASK_DEFINED); - ai = get_adapter (adapters, a_index); - if (ai) - { - memcpy (rgi->hwaddr, ai->Address, 6); - rgi->flags |= RGI_HWADDR_DEFINED; - } - } - } - } - - gc_free (&gc); -} - -static DWORD -windows_route_find_if_index (const struct route *r, const struct tuntap *tt) -{ - struct gc_arena gc = gc_new (); - DWORD ret = TUN_ADAPTER_INDEX_INVALID; - int count = 0; - const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); - const IP_ADAPTER_INFO *tun_adapter = get_tun_adapter (tt, adapters); - bool on_tun = false; - - /* first test on tun interface */ - if (is_ip_in_adapter_subnet (tun_adapter, r->gateway, NULL)) - { - ret = tun_adapter->Index; - count = 1; - on_tun = true; - } - else /* test on other interfaces */ - { - count = test_route (adapters, r->gateway, &ret); - } - - if (count == 0) - { - msg (M_WARN, "Warning: route gateway is not reachable on any active network adapters: %s", - print_in_addr_t (r->gateway, 0, &gc)); - ret = TUN_ADAPTER_INDEX_INVALID; - } - else if (count > 1) - { - msg (M_WARN, "Warning: route gateway is ambiguous: %s (%d matches)", - print_in_addr_t (r->gateway, 0, &gc), - count); - ret = TUN_ADAPTER_INDEX_INVALID; - } - - dmsg (D_ROUTE_DEBUG, "DEBUG: route find if: on_tun=%d count=%d index=%d", - on_tun, - count, - (int)ret); - - gc_free (&gc); - return ret; -} - -bool -add_route_ipapi (const struct route *r, const struct tuntap *tt, DWORD adapter_index) -{ - struct gc_arena gc = gc_new (); - bool ret = false; - DWORD status; - const DWORD if_index = (adapter_index == TUN_ADAPTER_INDEX_INVALID) ? windows_route_find_if_index (r, tt) : adapter_index; - - if (if_index != TUN_ADAPTER_INDEX_INVALID) - { - MIB_IPFORWARDROW fr; - CLEAR (fr); - fr.dwForwardDest = htonl (r->network); - fr.dwForwardMask = htonl (r->netmask); - fr.dwForwardPolicy = 0; - fr.dwForwardNextHop = htonl (r->gateway); - fr.dwForwardIfIndex = if_index; - fr.dwForwardType = 4; /* the next hop is not the final dest */ - fr.dwForwardProto = 3; /* PROTO_IP_NETMGMT */ - fr.dwForwardAge = 0; - fr.dwForwardNextHopAS = 0; - fr.dwForwardMetric1 = (r->flags & RT_METRIC_DEFINED) ? r->metric : 1; - fr.dwForwardMetric2 = METRIC_NOT_USED; - fr.dwForwardMetric3 = METRIC_NOT_USED; - fr.dwForwardMetric4 = METRIC_NOT_USED; - fr.dwForwardMetric5 = METRIC_NOT_USED; - - if ((r->network & r->netmask) != r->network) - msg (M_WARN, "Warning: address %s is not a network address in relation to netmask %s", - print_in_addr_t (r->network, 0, &gc), - print_in_addr_t (r->netmask, 0, &gc)); - - status = CreateIpForwardEntry (&fr); - - if (status == NO_ERROR) - ret = true; - else - { - /* failed, try increasing the metric to work around Vista issue */ - const unsigned int forward_metric_limit = 2048; /* iteratively retry higher metrics up to this limit */ - - for ( ; fr.dwForwardMetric1 <= forward_metric_limit; ++fr.dwForwardMetric1) - { - /* try a different forward type=3 ("the next hop is the final dest") in addition to 4. - --redirect-gateway over RRAS seems to need this. */ - for (fr.dwForwardType = 4; fr.dwForwardType >= 3; --fr.dwForwardType) - { - status = CreateIpForwardEntry (&fr); - if (status == NO_ERROR) - { - msg (D_ROUTE, "ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=%u and dwForwardType=%u", - (unsigned int)fr.dwForwardMetric1, - (unsigned int)fr.dwForwardType); - ret = true; - goto doublebreak; - } - else if (status != ERROR_BAD_ARGUMENTS) - goto doublebreak; - } - } - - doublebreak: - if (status != NO_ERROR) - msg (M_WARN, "ROUTE: route addition failed using CreateIpForwardEntry: %s [status=%u if_index=%u]", - strerror_win32 (status, &gc), - (unsigned int)status, - (unsigned int)if_index); - } - } - - gc_free (&gc); - return ret; -} - -bool -del_route_ipapi (const struct route *r, const struct tuntap *tt) -{ - struct gc_arena gc = gc_new (); - bool ret = false; - DWORD status; - const DWORD if_index = windows_route_find_if_index (r, tt); - - if (if_index != TUN_ADAPTER_INDEX_INVALID) - { - MIB_IPFORWARDROW fr; - CLEAR (fr); - - fr.dwForwardDest = htonl (r->network); - fr.dwForwardMask = htonl (r->netmask); - fr.dwForwardPolicy = 0; - fr.dwForwardNextHop = htonl (r->gateway); - fr.dwForwardIfIndex = if_index; - - status = DeleteIpForwardEntry (&fr); - - if (status == NO_ERROR) - ret = true; - else - msg (M_WARN, "ROUTE: route deletion failed using DeleteIpForwardEntry: %s", - strerror_win32 (status, &gc)); - } - - gc_free (&gc); - return ret; -} - -static const char * -format_route_entry (const MIB_IPFORWARDROW *r, struct gc_arena *gc) -{ - struct buffer out = alloc_buf_gc (256, gc); - buf_printf (&out, "%s %s %s p=%d i=%d t=%d pr=%d a=%d h=%d m=%d/%d/%d/%d/%d", - print_in_addr_t (r->dwForwardDest, IA_NET_ORDER, gc), - print_in_addr_t (r->dwForwardMask, IA_NET_ORDER, gc), - print_in_addr_t (r->dwForwardNextHop, IA_NET_ORDER, gc), - (int)r->dwForwardPolicy, - (int)r->dwForwardIfIndex, - (int)r->dwForwardType, - (int)r->dwForwardProto, - (int)r->dwForwardAge, - (int)r->dwForwardNextHopAS, - (int)r->dwForwardMetric1, - (int)r->dwForwardMetric2, - (int)r->dwForwardMetric3, - (int)r->dwForwardMetric4, - (int)r->dwForwardMetric5); - return BSTR (&out); -} - -/* - * Show current routing table - */ -void -show_routes (int msglev) -{ - struct gc_arena gc = gc_new (); - int i; - - const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc); - - msg (msglev, "SYSTEM ROUTING TABLE"); - if (rt) - { - for (i = 0; i < rt->dwNumEntries; ++i) - { - msg (msglev, "%s", format_route_entry (&rt->table[i], &gc)); - } - } - gc_free (&gc); -} - -#elif defined(TARGET_LINUX) || defined(TARGET_ANDROID) - -void -get_default_gateway (struct route_gateway_info *rgi) -{ - struct gc_arena gc = gc_new (); - int sd = -1; - char best_name[16]; - best_name[0] = 0; - - CLEAR(*rgi); - - /* get default gateway IP addr */ - { - FILE *fp = fopen ("/proc/net/route", "r"); - if (fp) - { - char line[256]; - int count = 0; - unsigned int lowest_metric = UINT_MAX; - in_addr_t best_gw = 0; - bool found = false; - while (fgets (line, sizeof (line), fp) != NULL) - { - if (count) - { - unsigned int net_x = 0; - unsigned int mask_x = 0; - unsigned int gw_x = 0; - unsigned int metric = 0; - unsigned int flags = 0; - char name[16]; - name[0] = 0; - const int np = sscanf (line, "%15s\t%x\t%x\t%x\t%*s\t%*s\t%d\t%x", - name, - &net_x, - &gw_x, - &flags, - &metric, - &mask_x); - if (np == 6 && (flags & IFF_UP)) - { - const in_addr_t net = ntohl (net_x); - const in_addr_t mask = ntohl (mask_x); - const in_addr_t gw = ntohl (gw_x); - - if (!net && !mask && metric < lowest_metric) - { - found = true; - best_gw = gw; - strcpy (best_name, name); - lowest_metric = metric; - } - } - } - ++count; - } - fclose (fp); - - if (found) - { - rgi->gateway.addr = best_gw; - rgi->flags |= RGI_ADDR_DEFINED; - if (!rgi->gateway.addr && best_name[0]) - rgi->flags |= RGI_ON_LINK; - } - } - } - - /* scan adapter list */ - if (rgi->flags & RGI_ADDR_DEFINED) - { - struct ifreq *ifr, *ifend; - in_addr_t addr, netmask; - struct ifreq ifreq; - struct ifconf ifc; - struct ifreq ifs[20]; /* Maximum number of interfaces to scan */ - - if ((sd = socket (AF_INET, SOCK_DGRAM, 0)) < 0) - { - msg (M_WARN, "GDG: socket() failed"); - goto done; - } - ifc.ifc_len = sizeof (ifs); - ifc.ifc_req = ifs; - if (ioctl (sd, SIOCGIFCONF, &ifc) < 0) - { - msg (M_WARN, "GDG: ioctl(SIOCGIFCONF) failed"); - goto done; - } - - /* scan through interface list */ - ifend = ifs + (ifc.ifc_len / sizeof (struct ifreq)); - for (ifr = ifc.ifc_req; ifr < ifend; ifr++) - { - if (ifr->ifr_addr.sa_family == AF_INET) - { - /* get interface addr */ - addr = ntohl(((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr); - - /* get interface name */ - strncpynt (ifreq.ifr_name, ifr->ifr_name, sizeof (ifreq.ifr_name)); - - /* check that the interface is up */ - if (ioctl (sd, SIOCGIFFLAGS, &ifreq) < 0) - continue; - if (!(ifreq.ifr_flags & IFF_UP)) - continue; - - if (rgi->flags & RGI_ON_LINK) - { - /* check that interface name of current interface - matches interface name of best default route */ - if (strcmp(ifreq.ifr_name, best_name)) - continue; -#if 0 - /* if point-to-point link, use remote addr as route gateway */ - if ((ifreq.ifr_flags & IFF_POINTOPOINT) && ioctl (sd, SIOCGIFDSTADDR, &ifreq) >= 0) - { - rgi->gateway.addr = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr); - if (rgi->gateway.addr) - rgi->flags &= ~RGI_ON_LINK; - } -#endif - } - else - { - /* get interface netmask */ - if (ioctl (sd, SIOCGIFNETMASK, &ifreq) < 0) - continue; - netmask = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr); - - /* check that interface matches default route */ - if (((rgi->gateway.addr ^ addr) & netmask) != 0) - continue; - - /* save netmask */ - rgi->gateway.netmask = netmask; - rgi->flags |= RGI_NETMASK_DEFINED; - } - - /* save iface name */ - strncpynt (rgi->iface, ifreq.ifr_name, sizeof(rgi->iface)); - rgi->flags |= RGI_IFACE_DEFINED; - - /* now get the hardware address. */ - memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr)); - if (ioctl (sd, SIOCGIFHWADDR, &ifreq) < 0) - { - msg (M_WARN, "GDG: SIOCGIFHWADDR(%s) failed", ifreq.ifr_name); - goto done; - } - memcpy (rgi->hwaddr, &ifreq.ifr_hwaddr.sa_data, 6); - rgi->flags |= RGI_HWADDR_DEFINED; - - break; - } - } - } - - done: - if (sd >= 0) - close (sd); - gc_free (&gc); -} - -#elif defined(TARGET_FREEBSD)||defined(TARGET_DRAGONFLY) - -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> - -/* all of this is taken from <net/route.h> in FreeBSD */ -#define RTA_DST 0x1 -#define RTA_GATEWAY 0x2 -#define RTA_NETMASK 0x4 - -#define RTM_GET 0x4 -#define RTM_VERSION 5 - -#define RTF_UP 0x1 -#define RTF_GATEWAY 0x2 - -/* - * These numbers are used by reliable protocols for determining - * retransmission behavior and are included in the routing structure. - */ -struct rt_metrics { - u_long rmx_locks; /* Kernel must leave these values alone */ - u_long rmx_mtu; /* MTU for this path */ - u_long rmx_hopcount; /* max hops expected */ - u_long rmx_expire; /* lifetime for route, e.g. redirect */ - u_long rmx_recvpipe; /* inbound delay-bandwidth product */ - u_long rmx_sendpipe; /* outbound delay-bandwidth product */ - u_long rmx_ssthresh; /* outbound gateway buffer limit */ - u_long rmx_rtt; /* estimated round trip time */ - u_long rmx_rttvar; /* estimated rtt variance */ - u_long rmx_pksent; /* packets sent using this route */ - u_long rmx_filler[4]; /* will be used for T/TCP later */ -}; - -/* - * Structures for routing messages. - */ -struct rt_msghdr { - u_short rtm_msglen; /* to skip over non-understood messages */ - u_char rtm_version; /* future binary compatibility */ - u_char rtm_type; /* message type */ - u_short rtm_index; /* index for associated ifp */ - int rtm_flags; /* flags, incl. kern & message, e.g. DONE */ - int rtm_addrs; /* bitmask identifying sockaddrs in msg */ - pid_t rtm_pid; /* identify sender */ - int rtm_seq; /* for sender to identify action */ - int rtm_errno; /* why failed */ - int rtm_use; /* from rtentry */ - u_long rtm_inits; /* which metrics we are initializing */ - struct rt_metrics rtm_rmx; /* metrics themselves */ -}; - -struct { - struct rt_msghdr m_rtm; - char m_space[512]; -} m_rtmsg; - -#define ROUNDUP(a) \ - ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) - -/* - * FIXME -- add support for netmask, hwaddr, and iface - */ -void -get_default_gateway (struct route_gateway_info *rgi) -{ - struct gc_arena gc = gc_new (); - int s, seq, l, pid, rtm_addrs, i; - struct sockaddr so_dst, so_mask; - char *cp = m_rtmsg.m_space; - struct sockaddr *gate = NULL, *sa; - struct rt_msghdr *rtm_aux; - -#define NEXTADDR(w, u) \ - if (rtm_addrs & (w)) {\ - l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\ - } - -#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) - -#define rtm m_rtmsg.m_rtm - - CLEAR(*rgi); - - pid = getpid(); - seq = 0; - rtm_addrs = RTA_DST | RTA_NETMASK; - - bzero(&so_dst, sizeof(so_dst)); - bzero(&so_mask, sizeof(so_mask)); - bzero(&rtm, sizeof(struct rt_msghdr)); - - rtm.rtm_type = RTM_GET; - rtm.rtm_flags = RTF_UP | RTF_GATEWAY; - rtm.rtm_version = RTM_VERSION; - rtm.rtm_seq = ++seq; - rtm.rtm_addrs = rtm_addrs; - - so_dst.sa_family = AF_INET; - so_dst.sa_len = sizeof(struct sockaddr_in); - so_mask.sa_family = AF_INET; - so_mask.sa_len = sizeof(struct sockaddr_in); - - NEXTADDR(RTA_DST, so_dst); - NEXTADDR(RTA_NETMASK, so_mask); - - rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; - - s = socket(PF_ROUTE, SOCK_RAW, 0); - - if (write(s, (char *)&m_rtmsg, l) < 0) - { - msg(M_WARN|M_ERRNO, "Could not retrieve default gateway from route socket:"); - gc_free (&gc); - close(s); - return; - } - - do { - l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); - } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); - - close(s); - - rtm_aux = &rtm; - - cp = ((char *)(rtm_aux + 1)); - if (rtm_aux->rtm_addrs) { - for (i = 1; i; i <<= 1) - if (i & rtm_aux->rtm_addrs) { - sa = (struct sockaddr *)cp; - if (i == RTA_GATEWAY ) - gate = sa; - ADVANCE(cp, sa); - } - } - else - { - gc_free (&gc); - return; - } - - - if (gate != NULL ) - { - rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr); - rgi->flags |= RGI_ADDR_DEFINED; - - gc_free (&gc); - } - else - { - gc_free (&gc); - } -} - -#elif defined(TARGET_DARWIN) - -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <net/route.h> -#include <net/if_dl.h> - -struct rtmsg { - struct rt_msghdr m_rtm; - char m_space[512]; -}; - -#define ROUNDUP(a) \ - ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t)) - -#define NEXTADDR(w, u) \ - if (rtm_addrs & (w)) {\ - l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\ - } - -#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) - -#define max(a,b) ((a) > (b) ? (a) : (b)) - -void -get_default_gateway (struct route_gateway_info *rgi) -{ - struct gc_arena gc = gc_new (); - struct rtmsg m_rtmsg; - int sockfd = -1; - int seq, l, pid, rtm_addrs, i; - struct sockaddr so_dst, so_mask; - char *cp = m_rtmsg.m_space; - struct sockaddr *gate = NULL, *ifp = NULL, *sa; - struct rt_msghdr *rtm_aux; - -# define rtm m_rtmsg.m_rtm - - CLEAR(*rgi); - - /* setup data to send to routing socket */ - pid = getpid(); - seq = 0; - rtm_addrs = RTA_DST | RTA_NETMASK | RTA_IFP; - - bzero(&m_rtmsg, sizeof(m_rtmsg)); - bzero(&so_dst, sizeof(so_dst)); - bzero(&so_mask, sizeof(so_mask)); - bzero(&rtm, sizeof(struct rt_msghdr)); - - rtm.rtm_type = RTM_GET; - rtm.rtm_flags = RTF_UP | RTF_GATEWAY; - rtm.rtm_version = RTM_VERSION; - rtm.rtm_seq = ++seq; - rtm.rtm_addrs = rtm_addrs; - - so_dst.sa_family = AF_INET; - so_dst.sa_len = sizeof(struct sockaddr_in); - so_mask.sa_family = AF_INET; - so_mask.sa_len = sizeof(struct sockaddr_in); - - NEXTADDR(RTA_DST, so_dst); - NEXTADDR(RTA_NETMASK, so_mask); - - rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; - - /* transact with routing socket */ - sockfd = socket(PF_ROUTE, SOCK_RAW, 0); - if (sockfd < 0) - { - msg (M_WARN, "GDG: socket #1 failed"); - goto done; - } - if (write(sockfd, (char *)&m_rtmsg, l) < 0) - { - msg (M_WARN, "GDG: problem writing to routing socket"); - goto done; - } - do { - l = read(sockfd, (char *)&m_rtmsg, sizeof(m_rtmsg)); - } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); - close(sockfd); - sockfd = -1; - - /* extract return data from routing socket */ - rtm_aux = &rtm; - cp = ((char *)(rtm_aux + 1)); - if (rtm_aux->rtm_addrs) - { - for (i = 1; i; i <<= 1) - { - if (i & rtm_aux->rtm_addrs) - { - sa = (struct sockaddr *)cp; - if (i == RTA_GATEWAY ) - gate = sa; - else if (i == RTA_IFP) - ifp = sa; - ADVANCE(cp, sa); - } - } - } - else - goto done; - - /* get gateway addr and interface name */ - if (gate != NULL ) - { - /* get default gateway addr */ - rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr); - if (rgi->gateway.addr) - rgi->flags |= RGI_ADDR_DEFINED; - - if (ifp) - { - /* get interface name */ - const struct sockaddr_dl *adl = (struct sockaddr_dl *) ifp; - int len = adl->sdl_nlen; - if (adl->sdl_nlen && adl->sdl_nlen < sizeof(rgi->iface)) - { - memcpy (rgi->iface, adl->sdl_data, adl->sdl_nlen); - rgi->iface[adl->sdl_nlen] = '\0'; - rgi->flags |= RGI_IFACE_DEFINED; - } - } - } - - /* get netmask of interface that owns default gateway */ - if (rgi->flags & RGI_IFACE_DEFINED) { - struct ifreq ifr; - - sockfd = socket(AF_INET, SOCK_DGRAM, 0); - if (sockfd < 0) - { - msg (M_WARN, "GDG: socket #2 failed"); - goto done; - } - - CLEAR(ifr); - ifr.ifr_addr.sa_family = AF_INET; - strncpynt(ifr.ifr_name, rgi->iface, IFNAMSIZ); - - if (ioctl(sockfd, SIOCGIFNETMASK, (char *)&ifr) < 0) - { - msg (M_WARN, "GDG: ioctl #1 failed"); - goto done; - } - close(sockfd); - sockfd = -1; - - rgi->gateway.netmask = ntohl(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr); - rgi->flags |= RGI_NETMASK_DEFINED; - } - - /* try to read MAC addr associated with interface that owns default gateway */ - if (rgi->flags & RGI_IFACE_DEFINED) - { - struct ifconf ifc; - struct ifreq *ifr; - const int bufsize = 4096; - char *buffer; - - buffer = (char *) gc_malloc (bufsize, true, &gc); - sockfd = socket(AF_INET, SOCK_DGRAM, 0); - if (sockfd < 0) - { - msg (M_WARN, "GDG: socket #3 failed"); - goto done; - } - - ifc.ifc_len = bufsize; - ifc.ifc_buf = buffer; - - if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0) - { - msg (M_WARN, "GDG: ioctl #2 failed"); - goto done; - } - close(sockfd); - sockfd = -1; - - for (cp = buffer; cp <= buffer + ifc.ifc_len - sizeof(struct ifreq); ) - { - ifr = (struct ifreq *)cp; - const size_t len = sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len); - if (!ifr->ifr_addr.sa_family) - break; - if (!strncmp(ifr->ifr_name, rgi->iface, IFNAMSIZ)) - { - if (ifr->ifr_addr.sa_family == AF_LINK) - { - struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr; - memcpy(rgi->hwaddr, LLADDR(sdl), 6); - rgi->flags |= RGI_HWADDR_DEFINED; - } - } - cp += len; - } - } - - done: - if (sockfd >= 0) - close(sockfd); - gc_free (&gc); -} - -#undef max - -#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) - -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> - -/* all of this is taken from <net/route.h> in OpenBSD 3.6 */ -#define RTA_DST 0x1 /* destination sockaddr present */ -#define RTA_GATEWAY 0x2 /* gateway sockaddr present */ -#define RTA_NETMASK 0x4 /* netmask sockaddr present */ - -#define RTM_GET 0x4 /* Report Metrics */ - -#define RTM_VERSION 3 /* Up the ante and ignore older versions */ - -#define RTF_UP 0x1 /* route usable */ -#define RTF_GATEWAY 0x2 /* destination is a gateway */ - -/* - * Huge version for userland compatibility. - */ -struct rt_metrics { - u_long rmx_locks; /* Kernel must leave these values alone */ - u_long rmx_mtu; /* MTU for this path */ - u_long rmx_hopcount; /* max hops expected */ - u_long rmx_expire; /* lifetime for route, e.g. redirect */ - u_long rmx_recvpipe; /* inbound delay-bandwidth product */ - u_long rmx_sendpipe; /* outbound delay-bandwidth product */ - u_long rmx_ssthresh; /* outbound gateway buffer limit */ - u_long rmx_rtt; /* estimated round trip time */ - u_long rmx_rttvar; /* estimated rtt variance */ - u_long rmx_pksent; /* packets sent using this route */ -}; - -/* - * Structures for routing messages. - */ -struct rt_msghdr { - u_short rtm_msglen; /* to skip over non-understood messages */ - u_char rtm_version; /* future binary compatibility */ - u_char rtm_type; /* message type */ - u_short rtm_index; /* index for associated ifp */ - int rtm_flags; /* flags, incl. kern & message, e.g. DONE */ - int rtm_addrs; /* bitmask identifying sockaddrs in msg */ - pid_t rtm_pid; /* identify sender */ - int rtm_seq; /* for sender to identify action */ - int rtm_errno; /* why failed */ - int rtm_use; /* from rtentry */ - u_long rtm_inits; /* which metrics we are initializing */ - struct rt_metrics rtm_rmx; /* metrics themselves */ -}; - -struct { - struct rt_msghdr m_rtm; - char m_space[512]; -} m_rtmsg; - -#define ROUNDUP(a) \ - ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) - -/* - * FIXME -- add support for netmask, hwaddr, and iface - */ -void -get_default_gateway (struct route_gateway_info *rgi) -{ - struct gc_arena gc = gc_new (); - int s, seq, l, rtm_addrs, i; - pid_t pid; - struct sockaddr so_dst, so_mask; - char *cp = m_rtmsg.m_space; - struct sockaddr *gate = NULL, *sa; - struct rt_msghdr *rtm_aux; - -#define NEXTADDR(w, u) \ - if (rtm_addrs & (w)) {\ - l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\ - } - -#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) - -#define rtm m_rtmsg.m_rtm - - CLEAR(*rgi); - - pid = getpid(); - seq = 0; - rtm_addrs = RTA_DST | RTA_NETMASK; - - bzero(&so_dst, sizeof(so_dst)); - bzero(&so_mask, sizeof(so_mask)); - bzero(&rtm, sizeof(struct rt_msghdr)); - - rtm.rtm_type = RTM_GET; - rtm.rtm_flags = RTF_UP | RTF_GATEWAY; - rtm.rtm_version = RTM_VERSION; - rtm.rtm_seq = ++seq; - rtm.rtm_addrs = rtm_addrs; - - so_dst.sa_family = AF_INET; - so_dst.sa_len = sizeof(struct sockaddr_in); - so_mask.sa_family = AF_INET; - so_mask.sa_len = sizeof(struct sockaddr_in); - - NEXTADDR(RTA_DST, so_dst); - NEXTADDR(RTA_NETMASK, so_mask); - - rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; - - s = socket(PF_ROUTE, SOCK_RAW, 0); - - if (write(s, (char *)&m_rtmsg, l) < 0) - { - msg(M_WARN|M_ERRNO, "Could not retrieve default gateway from route socket:"); - gc_free (&gc); - close(s); - return; - } - - do { - l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); - } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); - - close(s); - - rtm_aux = &rtm; - - cp = ((char *)(rtm_aux + 1)); - if (rtm_aux->rtm_addrs) { - for (i = 1; i; i <<= 1) - if (i & rtm_aux->rtm_addrs) { - sa = (struct sockaddr *)cp; - if (i == RTA_GATEWAY ) - gate = sa; - ADVANCE(cp, sa); - } - } - else - { - gc_free (&gc); - return; - } - - - if (gate != NULL ) - { - rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr); - rgi->flags |= RGI_ADDR_DEFINED; - - gc_free (&gc); - } - else - { - gc_free (&gc); - } -} - -#else - -/* - * This is a platform-specific method that returns data about - * the current default gateway. Return data is placed into - * a struct route_gateway_info object provided by caller. The - * implementation should CLEAR the structure before adding - * data to it. - * - * Data returned includes: - * 1. default gateway address (rgi->gateway.addr) - * 2. netmask of interface that owns default gateway - * (rgi->gateway.netmask) - * 3. hardware address (i.e. MAC address) of interface that owns - * default gateway (rgi->hwaddr) - * 4. interface name (or adapter index on Windows) that owns default - * gateway (rgi->iface or rgi->adapter_index) - * 5. an array of additional address/netmask pairs defined by - * interface that owns default gateway (rgi->addrs with length - * given in rgi->n_addrs) - * - * The flags RGI_x_DEFINED may be used to indicate which of the data - * members were successfully returned (set in rgi->flags). All of - * the data members are optional, however certain OpenVPN functionality - * may be disabled by missing items. - */ -void -get_default_gateway (struct route_gateway_info *rgi) -{ - CLEAR(*rgi); -} - -#endif - -bool -netmask_to_netbits (const in_addr_t network, const in_addr_t netmask, int *netbits) -{ - int i; - const int addrlen = sizeof (in_addr_t) * 8; - - if ((network & netmask) == network) - { - for (i = 0; i <= addrlen; ++i) - { - in_addr_t mask = netbits_to_netmask (i); - if (mask == netmask) - { - if (i == addrlen) - *netbits = -1; - else - *netbits = i; - return true; - } - } - } - return false; -} - -/* - * get_bypass_addresses() is used by the redirect-gateway bypass-x - * functions to build a route bypass to selected DHCP/DNS servers, - * so that outgoing packets to these servers don't end up in the tunnel. - */ - -#if defined(WIN32) - -static void -add_host_route_if_nonlocal (struct route_bypass *rb, const in_addr_t addr) -{ - if (test_local_addr(addr, NULL) == TLA_NONLOCAL && addr != 0 && addr != IPV4_NETMASK_HOST) - add_bypass_address (rb, addr); -} - -static void -add_host_route_array (struct route_bypass *rb, const IP_ADDR_STRING *iplist) -{ - while (iplist) - { - bool succeed = false; - const in_addr_t ip = getaddr (GETADDR_HOST_ORDER, iplist->IpAddress.String, 0, &succeed, NULL); - if (succeed) - { - add_host_route_if_nonlocal (rb, ip); - } - iplist = iplist->Next; - } -} - -static void -get_bypass_addresses (struct route_bypass *rb, const unsigned int flags) -{ - struct gc_arena gc = gc_new (); - /*bool ret_bool = false;*/ - - /* get full routing table */ - const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc); - - /* get the route which represents the default gateway */ - const MIB_IPFORWARDROW *row = get_default_gateway_row (routes); - - if (row) - { - /* get the adapter which the default gateway is associated with */ - const IP_ADAPTER_INFO *dgi = get_adapter_info (row->dwForwardIfIndex, &gc); - - /* get extra adapter info, such as DNS addresses */ - const IP_PER_ADAPTER_INFO *pai = get_per_adapter_info (row->dwForwardIfIndex, &gc); - - /* Bypass DHCP server address */ - if ((flags & RG_BYPASS_DHCP) && dgi && dgi->DhcpEnabled) - add_host_route_array (rb, &dgi->DhcpServer); - - /* Bypass DNS server addresses */ - if ((flags & RG_BYPASS_DNS) && pai) - add_host_route_array (rb, &pai->DnsServerList); - } - - gc_free (&gc); -} - -#else - -static void -get_bypass_addresses (struct route_bypass *rb, const unsigned int flags) /* PLATFORM-SPECIFIC */ -{ -} - -#endif - -/* - * Test if addr is reachable via a local interface (return ILA_LOCAL), - * or if it needs to be routed via the default gateway (return - * ILA_NONLOCAL). If the target platform doesn't implement this - * function, return ILA_NOT_IMPLEMENTED. - * - * Used by redirect-gateway autolocal feature - */ - -#if defined(WIN32) - -int -test_local_addr (const in_addr_t addr, const struct route_gateway_info *rgi) -{ - struct gc_arena gc = gc_new (); - const in_addr_t nonlocal_netmask = 0x80000000L; /* routes with netmask <= to this are considered non-local */ - bool ret = TLA_NONLOCAL; - - /* get full routing table */ - const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc); - if (rt) - { - int i; - for (i = 0; i < rt->dwNumEntries; ++i) - { - const MIB_IPFORWARDROW *row = &rt->table[i]; - const in_addr_t net = ntohl (row->dwForwardDest); - const in_addr_t mask = ntohl (row->dwForwardMask); - if (mask > nonlocal_netmask && (addr & mask) == net) - { - ret = TLA_LOCAL; - break; - } - } - } - - gc_free (&gc); - return ret; -} - -#else - -int -test_local_addr (const in_addr_t addr, const struct route_gateway_info *rgi) /* PLATFORM-SPECIFIC */ -{ - if (rgi) - { - if (local_route (addr, 0xFFFFFFFF, rgi->gateway.addr, rgi)) - return TLA_LOCAL; - else - return TLA_NONLOCAL; - } - return TLA_NOT_IMPLEMENTED; -} - -#endif |