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* Implement handling of overlapping IPv6 routes with IPv6 remote VPN server ↵Gert Doering2015-09-171-14/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | address - socket.[ch]: add link_socket_current_remote_ipv6() helper to extract current address of remote VPN server (if IPv6, NULL otherwise), IPv6 equivalent to link_socket_current_remote() - init.c: pass remote VPN server address to init_route_ipv6_list() (link_socket_current_remote_ipv6()) - route.h: add route_ipv6_gateway_info to route_ipv6_list, and reorder structures so that this actually compiles. Add iface/adapter_index to struct route_ipv6 (for non-tun/tap routes). - route.[ch]: add "const" to *dest argument to get_default_gateway_ipv6() - route.c: add route_ipv6_match_host() helper to check whether an IPv6 address is matched by a given "route_ipv6" IPv6 route) - route.c: init_route_ipv6_list() - call get_default_gateway_ipv6() - check to-be-installed IPv6 routes against VPN server address (if IPv6) - if an overlap is seen, add a host route for the VPN server address via the just-discovered gateway to the list of IPv6 routes to be installed (rl6->routes_ipv6) - warn if overlap is detected but platform code has not been able to discover IPv6 default gateway - route.c: add_route_ipv6() / delete_route_ipv6(): set "device" to "external default gateway interface" (r6->iface) instead of TUN/TAP device (if set), which nicely enables arbitrary gateway/interface combinations for Linux - ssl.c: add "IV_RGI6=1" to push-peer-info data to let server know we can handle pushed IPv6 routes that overlap with server IPv6 address - tun.c: when adding/removing on-link routes, CLEAR(r6) first to ensure new struct route_ipv6 members are cleared Tested on Linux with iproute2 and /bin/route, on eth and tun routes. Signed-off-by: Gert Doering <gert@greenie.muc.de> Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <1441985627-14822-7-git-send-email-gert@greenie.muc.de> URL: http://article.gmane.org/gmane.network.openvpn.devel/10089
* Create basic infrastructure for IPv6 default gateway handling / redirection.Gert Doering2015-09-151-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | - introduce get_default_gateway_ipv6() and add stub functions with the implementation plan to the 4 major code blocks here (Windows, Linux/Android, *BSD and Solaris, "others") - add &rgi6 to print_default_gateway(), and teach it to print v4, v6 or both, depending on the calling environment - unlike IPv4 (today), get_default_gateway_ipv6() is passed the actual target IPv6 address of the server we're looking for, so we can handle more complicated routing setups ("default to eth0, vpn server to ppp0") correctly - consequently, --show-gateway has an optional parameter now, the IPv6 address to look up (for debugging) - document --show-gateway and the extra option in openvpn.8 Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <1441985627-14822-5-git-send-email-gert@greenie.muc.de> URL: http://article.gmane.org/gmane.network.openvpn.devel/10087 Signed-off-by: Gert Doering <gert@greenie.muc.de>
* Add route_ipv6_gateway* data structures for rgi6 support.Gert Doering2015-09-141-0/+28
| | | | | | | | | | route_gateway_address -> route_ipv6_gateway_address route_gateway_info -> route_ipv6_gateway_info Signed-off-by: Gert Doering <gert@greenie.muc.de> Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <1441985627-14822-4-git-send-email-gert@greenie.muc.de> URL: http://article.gmane.org/gmane.network.openvpn.devel/10088
* refactor struct route_ipv6_list, bring in line with struct route_list againGert Doering2015-09-141-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | adjust "struct route_ipv6_list" (and all users) to reflect changes to "struct route_list" done in commit 7fb0e07e, namely: - new member "rl6->iflags" (RL_* flags) - new member "rl6->spec_flags" (RTSA_* flags) - new member "rl6->remote_host_ipv6" (--remote address we're talking to) - "rl6->routes_added" --> "rl6->iflags & RL_ROUTES_ADDED" - "rl6->did_redirect_default_gateway" --> "rl6->iflags & RL_DID_REDIRECT_DEFAULT_GATEWAY" - "rl6->did_local" --> "rl6->iflags & RL_DID_LOCAL" - "rl6->remote_endpoint_defined" --> "rl6->spec_flags & RTSA_REMOTE_ENDPOINT" - "rl6->default_metric_defined" --> "rl6->spec_flags & RTSA_DEFAULT_METRIC" deviating from IPv4 route_list, there is no "route_special_addr spec" sub-struct, because it's not considered useful (rl->spec.flags becomes rl6->spec_flags, the IPv6 equivalent of everything else in rl->spec just lives inside struct route_ipv6_list) Signed-off-by: Gert Doering <gert@greenie.muc.de> Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <1441985627-14822-3-git-send-email-gert@greenie.muc.de> URL: http://article.gmane.org/gmane.network.openvpn.devel/10084
* refactor struct route_ipv6, bring in line with struct route_ipv4 againGert Doering2015-09-141-2/+1
| | | | | | | | | | | | | | | adjust "struct route_ipv6" (and all users) to reflect changes to "struct route_ipv4" done in commit 7fb0e07e, namely: - new member "r6->flags" - "r6->defined" becomes "r6->flags & RT_DEFINED" - "r6->metric_defined" becomes "r6->flags & RT_METRIC_DEFINED" - route addition status is stored in "r6->flags & RT_ADDED" Signed-off-by: Gert Doering <gert@greenie.muc.de> Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <1441985627-14822-2-git-send-email-gert@greenie.muc.de> URL: http://article.gmane.org/gmane.network.openvpn.devel/10083
* Remove count_netmask_bits(), convert users to use netmask_to_netbits2()Gert Doering2015-03-081-0/+1
| | | | | | | | | | | | The previous Linux/iproute2 code converted binary netmasks to string representation (print_in_addr_t()), just to immediately scanf() it back to binary to count bits. netmask_to_netbits2() directly works on the in_addr_t. Signed-off-by: Gert Doering <gert@greenie.muc.de> Acked-by: Steffan Karger <steffan.karger@fox-it.com> Message-Id: <1419713983-16272-1-git-send-email-gert@greenie.muc.de> URL: http://article.gmane.org/gmane.network.openvpn.devel/9360
* grow route lists dynamicallyHeiko Hund2014-02-231-21/+17
| | | | | | | | | | | | | This removes the need for the --max-routes option. Instead of allocating a fixed size array for the route(-option)s they are managed in linked lists instead. Signed-off-by: Heiko Hund <heiko.hund@sophos.com> Acked-by: Arne Schwabe <arne@rfc2549.org> Acked-by: Gert Doering <gert@greenie.muc.de> Message-Id: <1392746395-19246-1-git-send-email-heiko.hund@sophos.com> URL: http://article.gmane.org/gmane.network.openvpn.devel/8295 Signed-off-by: Gert Doering <gert@greenie.muc.de>
* Rename 'struct route' to 'struct route_ipv4'Gert Doering2014-01-161-5/+5
| | | | | | | | | | | | To fix trac #340, we need to rename our "struct route" to avoid a collision with "struct route" from <net/route.h> on *BSD. No functional changes. Signed-off-by: Gert Doering <gert@greenie.muc.de> Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <1389650074-18455-1-git-send-email-gert@greenie.muc.de> URL: http://article.gmane.org/gmane.network.openvpn.devel/8231
* Fix parameter listing in non-debug builds at verb 4Josh Cepek2013-03-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | When built with enable_debug=no, the parameter output expected at --verb 4 is not printed due to use of #ifdef ENABLE_DEBUG in the responsible code sections. This appears to be a mistake when looking at the configure help text for enable_small and enable_debug. This change keys the relevant code off of enable_small instead, including the parameter listing when enale_small=no (the configure-script default.) Most of this code is in options.c, with some callers present in plugin.c/h and route.c/h. No function code is changed, just the #ifdef values to use the small feature instead of debug. This means builds no longer need enable_debug=yes in order to get the expected log output at verb 4. Signed-off-by: Josh Cepek <josh.cepek@usa.net> Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <437RBuq1U8032S07.1361465626@web07.cms.usa.net> URL: http://article.gmane.org/gmane.network.openvpn.devel/7361 Signed-off-by: Gert Doering <gert@greenie.muc.de>
* remove "*option" element in "struct route_ipv6"Gert Doering2012-06-131-1/+0
| | | | | | | | | | | this used to point to the "route_ipv6_option" that created this specific route entry, but nobody ever queried this field -> dead code. Signed-off-by: Gert Doering <gert@greenie.muc.de> Acked-by: David Sommerseth <davids@redhat.com> Message-Id: 1339342891-28443-3-git-send-email-gert@greenie.muc.de URL: http://article.gmane.org/gmane.network.openvpn.devel/6714 Signed-off-by: David Sommerseth <davids@redhat.com>
* cleanup: avoid using ~0 - netmaskAlon Bar-Lev2012-04-021-1/+1
| | | | | | | | Use IPV4_NETMASK_HOST constant. Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com> Acked-by: Gert Doering <gert@greenie.muc.de> Signed-off-by: David Sommerseth <davids@redhat.com>
* build: standard directory layoutAlon Bar-Lev2012-03-221-0/+339
Suitable for mature project. root - administrative stuff doc - documents src - sources tests - tests distro - distro specific files sample - samples SIDE EFFECT: many changes to rpm spec. Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com> Acked-by: Adriaan de Jong <dejong@fox-it.com> Signed-off-by: David Sommerseth <davids@redhat.com>
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