diff options
Diffstat (limited to 'debian/patches/ipv6-payload.patch')
| -rw-r--r-- | debian/patches/ipv6-payload.patch | 4049 |
1 files changed, 4049 insertions, 0 deletions
diff --git a/debian/patches/ipv6-payload.patch b/debian/patches/ipv6-payload.patch new file mode 100644 index 0000000..cdc396a --- /dev/null +++ b/debian/patches/ipv6-payload.patch @@ -0,0 +1,4049 @@ +Description: IPv6 payload support +Author: Gert Döring +URL: http://www.greenie.net/ipv6/openvpn.html +Index: openvpn-2.2.1/ChangeLog.IPv6 +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ openvpn-2.2.1/ChangeLog.IPv6 2011-12-13 12:24:54.608739565 +0100 +@@ -0,0 +1,394 @@ ++Do 31. Dez 15:32:40 CET 2009 Gert Doering ++ ++ * Basic IPv6 p2mp functionality implemented ++ ++ * new options: ++ - server-ipv6 ++ - ifconfig-ipv6 ++ - ifconfig-ipv6-pool ++ - route-ipv6 ++ - iroute-ipv6 ++ ++ * modules touched: ++ - init.c: init & setup IPv6 route list & add/delete IPv6 routes ++ - tun.c: add "ifconfig" and "route" handling for IPv6 ++ - multi.c: IPv6 ifconfig-pool assignments ++ put to route-hash table ++ push to client ++ - pool.c: extend pools to handle IPv4+IPv6, and also return IPv6 address ++ IPv6 address saved to file if ifconfig-pool-persist is set ++ (but ignored on read due to the way pools work) ++ - mroute.c: handle reading src/dst addresses from IPv6 packets ++ (so multi.c can check against route-hash table) ++ handle printing of IPv6 mroute_addr structure ++ - helper.c: implement "server-ipv6" macro (->ifconfig-ipv6, pool, ...) ++ - options.c: implement all the new options ++ add helper functions for IPv6 address handling ++ - forward.c: tell do_route() about IPv6 routes ++ - route.c: handle IPv6 route lists + route option lists ++ extend add_routes() to do IPv4 + IPv6 route lists ++ extend delete_routes() to do IPv4 + IPv6 route lists ++ implement add_route_ipv6(), delete_route_ipv6() to call ++ system-dependend external program to do the work ++ - push.c: handle pushing of "ifconfig-ipv6" option ++ - socket.c: helper function to check & print IPv6 address strings ++ ++ * known issues: ++ - operating system support on all but Linux (ifconfig, route) ++ - route-ipv6 gateway handling ++ - iroute-ipv6 not implemented ++ - TAP support: ifconfig, routing (route needs gateway!) ++ ++ * release as patch 20091231-1 ++ ++Thu Dec 31 17:02:08 CET 2009 ++ ++ * NetBSD port (NetBSD 3.1 on Sparc64) ++ ++ * mroute.c, socket.c: make byte/word access to in6_addr more portable ++ ++ * tun.c: fix IPv6 ifconfig arguments on NetBSD ++ ++ still doesn't work on NetBSD 3.1, "ifconfig tun0 inet6..." errors with ++ ++ ifconfig: SIOCAIFADDR: Address family not supported by protocol family ++ ++ (sys/net/if_tun.c, needs to be revision 1.80 or later, NetBSD PR 32944, ++ included in NetBSD 4.0 and up) ++ ++ ++Fri Jan 1 14:07:15 CET 2010 ++ ++ * FreeBSD port (FreeBSD 6.3-p12 on i386) ++ ++ * tun.c: implement IPv6 ifconfig setting for FreeBSD ++ ++ * route.c: fix %s/%s argument to IPv6 route add/delete command for *BSD ++ ++ * TEST SUCCESS: FreeBSD 6.3-p12, server-ipv6, route-ipv6, ccd/iroute-ipv6 ++ ++ * multi.c: implement setting and deleting of iroute-ipv6 ++ (multi_add_iroutes(), multi_del_iroutes()) ++ * mroute.c: add mroute_helper_add_iroute6(), mroute_helper_del_iroute6() ++ * mroute.h: add prototypes, increase MR_HELPER_NET_LEN to 129 (/0.../128) ++ * multi.c: zeroize host part of IPv6 iroutes in multi_learn_in6_addr() ++ * mroute.c: implement mroute_addr_mask_host_bits() for IPv6 ++ ++ * TEST SUCCESS: Linux 2.6.30 (Gentoo)/iproute2, server-ipv6, ccd/iroute-ipv6 ++ ++ * TEST SUCCESS: Linux 2.6.30 (Gentoo)/ifconfig, client-ipv6 ++ ++ * TEST FAIL: NetBSD 5.0, IPv6 client ++ - "ifconfig tun0 .../64" does not create a "connected" route ++ - adding routes fails ++ ++ --> more work to do here. ++ ++ * release as patch 20100101-1 ++ ++ * TEST FAIL: ++ FreeBSD 6.3-p12 server "--topology subnet" ++ Linux/ifconfig client ++ - BSD sends ICMP6 neighbor solicitations, which are ignored by Linux ++ - server tun interface is not in p2p mode, client tun interface *is* ++ ++ * TEST SUCCESS: non-ipv6 enabled client -> "--server-ipv6" server ++ (warnings in the log file, but no malfunctions) ++ ++ ++Sat Jan 2 19:48:35 CET 2010 ++ ++ * tun.c: change "ipv6_support()", do not turn off tt->ipv6 unconditionally ++ if we don't know about OS IPv6 support - just log warning ++ ++ * tun.c: implement "ifconfig inet6" setting for MacOS X / Darwin ++ ++ * route.c: split *BSD system dependent part of add/delete_route_ipv6() ++ into FreeBSD/Dragonfly and NetBSD/Darwin/OpenBSD variants ++ ("2001:db8::/64" vs. "2001:db8:: --prefixlen 64"). ++ ++ * tun.c: on MacOS X, NetBSD and OpenBSD, explicitely set on-link route ++ ++ * TEST SUCCESS: MacOS X, client-ipv6 with route-ipv6 ++ ++ ++Sun Jan 3 10:55:31 CET 2010 ++ ++ * route.c: NetBSD fails with "-iface tun0", needs gateway address ++ (assume that the same syntax is needed for OpenBSD) ++ ++ * route.h: introduce "remote_endpoint_ipv6" into "struct route_ipv6_list" ++ ++ * init.c: pass "ifconfig_ipv6_remote" as gateway to init_route_ipv6_list() ++ ++ * route.c: ++ - init_route_ipv6(): use "remote_endpoint_ipv6" as IPv6 gateway address ++ if no gateway was specified explicitely ++ ++ - init_route_ipv6_list(): fill in "remote_endpoint_ipv6", if parseable ++ ++ - get rid of "GATEWAY-LESS ROUTE6" warning ++ ++ * route.c, add_route_ipv6() ++ - explicitely clear host bits of base address, to be able to more ++ easily set up "connected" /64 routes on NetBSD+Darwin ++ ++ - split system-dependent part between Darwin and NetBSD/OpenBSD ++ (Darwin can use "-iface tun0", NetBSD/OpenBSD get gateway address) ++ ++ - change Solaris comments from "known-broken" to "unknown" ++ ++ * tun.c: rework NetBSD tunnel initialization and tun_read() / tun_write() ++ to work the same way OpenBSD and NetBSD do - tunnel is put into ++ "multi-af" mode, and all packet read/write activity is prepended by ++ a 32 bit value specifying the address family. ++ ++ * TEST SUCCESS: NetBSD 5.0/Sparc64: client-ipv6 with route-ipv6 ++ ++ * TEST SUCCESS: MacOS X 10.5: client-ipv6 with route-ipv6 ++ ++ * (RE-)TEST SUCCESS: Linux/iproute2: server-ipv6 ++ Linux/ifconfig: client-ipv6 ++ FreeBSD 6.3: server-ipv6 ++ ++ * release as patch 20100103-1 ++ ++ * options.c: document all new options in "--help" ++ ++ * tun.c: fix typo in Solaris-specific section ++ ++ * socket.h, socket.c: change u_int32_t to uint32_t ++ (Solaris - and all the rest of the code uses "uintNN" anyway) ++ ++Mon Jan 4 17:46:58 CET 2010 ++ ++ * socket.c: rework add_in6_addr() to use 32-bit access to struct in6_addr ++ (Solaris has no 16-bit values in union, but this is more elegant as well) ++ ++ * tun.c: fix "ifconfig inet6" command for Solaris ++ ++ * tun.c: make sure "tun0 inet6" is unplumbed first, cleanup leftovers ++ ++ * route.c: add routes with "metric 0" on solaris, otherwise they just ++ don't work (someone who understands Solaris might want to fix this). ++ ++ * Solaris "sort of" works now - ifconfig works, route add does not give ++ errors, "netstat -rn" looks right, but packets are discarded unless ++ the routes are installed with "metric 0". So we just use "metric 0"... ++ ++ * CAVEAT: Solaris "ifconfig ... preferred" interferes with source address ++ selection. So if there are any active IPv6 interfaces configured with ++ "preferred", packets leaving out the tunnel will use the wrong source ++ IPv6 address. Not fixable from within OpenVPN. ++ ++ * CAVEAT2: Solaris insists on doing DHCPv6 on tun0 interfaces by default, ++ so DHCPv6 solicitation packets will be seen. Since the server end has ++ no idea what to do with them, they are a harmless nuisance. Fixable ++ on the Solaris side via "ndpd.conf" (see ``man ifconfig''). ++ ++ * release as patch 20100104-1 ++ ++Fri Jan 8 10:00:50 CET 2010 ++ ++ * import into git repository ++ ++ * options.c: add sanity checks for most typical error cases ++ (--ifconfig-ipv6-pool configured with no --ifconfig-ipv6, etc) ++ ++ * options.c: modify get_ipv6_addr() to be more flexible about netbits ++ (optional now, default to /64) and to return the address-without-netbits ++ string now (-> for options that want the IPv6 address in printable ++ form, but without /nn) ++ ++ * options.c: modify --ifconfig-ipv6 to optionally accept /netbits, ++ you can do now "ifconfig-ipv6 2001:df8::1/64 2001:df8::2" or just ++ "ifconfig-ipv6 2001:df8::5 2001:df8::7", defaulting to /64 ++ ++ * options.h: add necessary structure elements for --ifconfig-ipv6-push ++ ++ * options.c: implement "parse options" side of --ifconfig-ipv6-push ++ ++Tue Jan 12 22:42:09 CET 2010 ++ ++ * tun.c: in TARGET_NETBSD #ifdef, distinguish between "old" code ++ (IPv4 only, but unmodified read/write) and "new" code (multi-af, ++ extra 32 bit AF on read/write of the tun interface) - pre-4.0 ++ NetBSD systems don't have TUNSIFHEAD, no way to have common code. ++ ++ * TEST SUCCESS: NetBSD 5.0/Sparc64: client-ipv6 with route-ipv6 (v4+v6) ++ ++ * TEST SUCCESS: NetBSD 3.1/Sparc64: client-ipv6 with route-ipv6 (v4-only) ++ ++Thu Jan 14 15:41:50 CET 2010 ++ ++ * multi.c: if "--ifconfig-push" is used together with "--ifconfig-ipv6-pool" ++ and no "--ifconfig-ipv6-push" is seen, issue warning - the current ++ implementation of pools has IPv6 tied to IPv4, so if v4 does not use ++ the pool, it breaks for IPv6. Not a *big* problem (since there is ++ enough v6, just give those users a static v6 address as well), but needs ++ to be pointed out clearly. ++ ++ * release as patch 20100114-1 ++ ++Tue Feb 16 14:43:28 CET 2010 ++ ++ * options.c: print "IPv6 payload patch" release date in "--version" ++ ++ * tun.c: undo change to init_tun() (moving "bool tun" and call to ++ "is_tun_p2p()" further up) - it wasn't needed and breaks "make check" ++ ++ * git stuff: rebase on David Sommerseth's openvpn-testing git tree ++ ++ * release as patch 20100216-1 ++ ++Fri Feb 26 19:59:01 CET 2010 ++ ++ * init.c: initialize tuntap->ipv6 in do_init_tun() (to make sure it's ++ always initialized early-enough, independent of the sequence of ++ do_ifconfig()/open_tun() [see ifconfig_order() in tun.h]) ++ ++ * tun.c, init.c: remove "bool ipv6" argument to tuncfg(), open_tun() ++ and open_tun_generic() - obsoleted by previous change ++ ++ * tun.c: remove ipv6_support() - original purpose was unclear, and all ++ current platforms (except linux-very-old) fully support IPv6 now :-) ++ ++ * tun.c: initial implementation of "netsh" IPv6-ifconfig for Win32 ++ ++ * RE-TEST SUCCESS: Linux/i386/ifconfig, client-tun/net30, v4+v6 ++ ++Sun Feb 28 17:05:57 CET 2010 ++ ++ * tun.c: NetBSD dependent part: correct destroying/re-creation of tun dev ++ ++ * tun.c: move adding of "connected" IPv6 prefix to new helper function, ++ add_route_connected_v6_net() ++ ++ * RE-TEST SUCCESS: NetBSD 5.0/Sparc64, client-tun/net30, v4+v6 ++ ++ * RE-TEST SUCCESS: NetBSD 3.1/Sparc64: client-tun/net30, v4-only ++ ++ * RE-TEST SUCCESS: Linux/i386/iproute2: server-tun/net30, v4+v6 ++ ++ * tun.c: add #ifdef TARGET_DARWIN block for *_tun() functions, to ++ be able to modify close_tun() for unconfiguring IPv6 ++ ++ * tun.c: on close_tun() on MacOS X, need to de-configure "lo0" route for ++ configured IPv6 address ++ ++ * RE-TEST SUCCESS: MacOS X (10.5)/i386: client-tun/net30, v4+v6 ++ ++ * route.c: implement ipv6 route adding / deletion via "netsh" for WIN32 ++ ++ * TEST FAIL: Windows XP fails, because the tun/tap driver does not ++ forward IPv6 frames kernel->userland if in "tun" mode ++ ++ * options.c: set IPv6 version to 20100228-1 ++ ++ * release as patch 20100228-1 ++ ++Sun Mar 7 19:17:33 CET 2010 ++ ++ * options.c: set IPv6 version to 20100307-1 ++ ++ * TODO.IPv6: add note about OpenBSD TODO (#16) ++ ++ * route.c: set (and remove) "magic next hop" fe80::8 for IPv6 routes on ++ Win32 ++ ++ * install-win32/settings.in: bump TAP driver version from 9.6 to 9.7 ++ and TAP_RELDATE to "07/03/2010" ++ ++ * tap-win32/proto.h: add data types and definitions needed for IPv6 ++ ++ * tap-win32/types.h: add m_UserToTap_IPv6 ethernet header for IPv6 packets ++ ++ * tap-win32/tapdrvr.c: implement support for IPv6 in TUN mode: ++ - IPv6 packets User->OS need correct ether type ++ - IPv6 packets OS->User get correctly forwarded ++ - IPv6 neighbour discovery packets for "fe80::8" (magic address ++ installed as route-nexthop by OpenVPN.exe) get answered locally ++ ++ * TEST SUCCESS: WindowsXP/32bit: client-tun/net30, v4+v6 ++ ++ * tun.c: if IPv6 requested in TUN mode, and TUN/TAP driver version ++ is older than 9.7, log warning and disable IPv6 (won't work anyway). ++ ++ * release as patch 20100307-1 ++ ++Sat Jul 10 14:37:52 CEST 2010 ++ ++ * TEST SUCCESS: point-to-point tun mode with --ifconfig-ipv6 between ++ Solaris10/sparc and Linux (Michal Ludvig) ++ (using the whiteboard tun driver on Solaris, otherwise "no IPv6") ++ ++Sun Aug 8 12:30:44 CEST 2010 ++ ++ * route.c: split NetBSD and OpenBSD parts of add_route_ipv6() and ++ delete_route_ipv6(), implement OpenBSD variant ++ (needs "-prefixlen nn" while NetBSD uses "/nn") ++ ++ * tun.c: implement IPv6 ifconfig for OpenBSD ++ ++ * tun.c: destroy tunX interface at tun_close() on OpenBSD (cleanup) ++ ++ * TEST SUCCESS: OpenBSD 4.7: client-tun/net30, v4+v6 ++ ++Thu Sep 2 21:18:32 CEST 2010 ++ ++ * tun.c: the TAP binary in 2.2-beta3 has the IPv6 related changes, but ++ the version number is 9.8 now -> check for 9.8, not 9.7 ++ ++Wed Sep 22 22:20:37 CEST 2010 ++ ++ * tun.c: bugfix for Linux/iproute2/"topology subnet". Works :-) ++ ++ * TEST SUCCESS: Linux/ifconfig: client-tun/net30+subnet, v4+v6 ++ ++ * TEST SUCCESS: Linux/iproute2: client-tun/net30+subnet, v4+v6 ++ ++ * options.c: tag as 20100922-1 so "allmerged" users can see IPv6 change ++ ++Fri Sep 24 17:57:41 CEST 2010 ++ ++ * TEST SUCCESS: Linux/<both>: client-tap, v4+v6, ping6 on connected addr ++ ++ * TEST FAIL: Linux/<both>: client-tap, v6, route6 (gateway missing) ++ ++Do 21. Okt 19:36:49 CEST 2010 ++ ++ * t_client.sh.in: cherrypick commit f25fe91a40aa3f and 6f1e61b41be52 ++ (proper exit codes to signal "SKIP" if we do not want to run) ++ ++So 16. Jan 17:25:23 CET 2011 ++ ++ * tun.c, route.c: cherrypick 121755c2cb4891f and f0eac1a5979096c67 ++ (TAP driver and "topology subnet" support for Solaris) ++ ++ * tun.c: add IPv6 configuration for TAP interfaces (<device>:1 inet6) ++ ++ * tun.c: on close_tun on Solaris, unplumb IPv6 TUN or TAP interfaces ++ ++ * TEST SUCCESS: OpenSolaris: client-tun, v4+v6 ++ TEST SUCCESS: OpenSolaris: client-tap, v4+v6, ping6 on connected addr ++ TEST FAIL: OpenSolaris: client-tap, v6, route6 (gateway missing) ++ ++So 24. Apr 16:51:45 CEST 2011 ++ ++ * rebase to "beta2.2" branch (at 2.2RC2 tag) ++ ++ * mroute.c: remove mroute_helper_lock/_unlock() calls for IPv6 ++ * socket.c: remove locking with L_INET_NTOA mutex ++ (all the threading stuff got removed by David Sommerseth for 2.2) ++ ++ * mroute.c: remove duplicate mroute_helper_add_iroute6() and ++ mroute_helper_del_iroute6() - "git rebase" artefact ++ ++ * ChangeLog.IPv6 and TODO.IPv6: add to commit ++ ++ * options.c: tag as 20110424-2 (2.2RC2) ++ ++ * TEST SUCCESS: Linux/ifconfig: client-tun/net30+subnet, v4+v6 ++ ++ * TEST SUCCESS: Linux/iproute2: client-tun/net30+subnet, v4+v6 ++ +Index: openvpn-2.2.1/README.IPv6 +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ openvpn-2.2.1/README.IPv6 2011-12-13 12:24:54.608739565 +0100 +@@ -0,0 +1,8 @@ ++This is an experimentally patched version of OpenVPN 2.1 with IPv6 ++payload support. ++ ++Go here for release notes and documentation: ++ ++ http://www.greenie.net/ipv6/openvpn.html ++ ++Gert Doering, 31.12.2009 +Index: openvpn-2.2.1/TODO.IPv6 +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ openvpn-2.2.1/TODO.IPv6 2011-12-13 12:24:54.609739553 +0100 +@@ -0,0 +1,149 @@ ++known issues for IPv6 payload support in OpenVPN ++----------------------------------------------- ++ ++1.) "--topology subnet" doesn't work together with IPv6 payload on FreeBSD ++ (verified for FreeBSD server, Linux/ifconfig client, problems ++ with ICMP6 neighbor solicitations from BSD not being answered by Linux) ++ ++2.) NetBSD IPv6 support doesn't work ++ ("connected" route is not auto-created, "route-ipv6" adding fails) ++ ++ * fixed, 3.1.10 * ++ ++3.) route deletion for IPv6 routes is not yet done ++ ++ * fixed for configured routes, 3.1.10 * ++ * missing for manual-ifconfig-connected (NetBSD, Darwin, Win32) ++ ++4.) do "ifconfig tun0 inet6 unplumb" or "ifconfig tun0 destroy" for ++ Solaris, *BSD, ... at program termination time, to clean up leftovers ++ (unless tunnel persistance is desired). ++ ++ For Solaris, only the "ipv6 tun0" is affected, for the *BSDs all tun0 ++ stay around. ++ ++4a.) deconfigure IPv6 on tun interface on session termination, otherwise ++ one could end up with something like this (on NetBSD): ++ ++tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500 ++ inet 10.9.0.18 -> 10.9.0.17 netmask 0xffffffff ++ inet6 fe80::a00:20ff:fece:d299%tun0 -> prefixlen 64 scopeid 0x3 ++ inet6 2001:608:4:eff::2000:3 -> prefixlen 64 ++ inet6 2001:608:4:eff::1:3 -> prefixlen 64 ++ ++ (pool was changed, previous address still active on tun0, breakage) ++ ++ * semi-fixed for NetBSD, 28.2.10, always do tun0 destroy / tun0 create ++ before actual ifconfig -- tunnel still lingers after OpenVPN quits ++ ++4b.) verify this - on FreeBSD, tun0 is auto-destroyed if created by ++ opening /dev/tun (and lingers if created by "ifconfig tun0 create") ++ ++ -> use for persistant tunnels on not-linux? ++ ++5.) add new option "ifconfig-ipv6-push" ++ (per-client static IPv6 assignment, -> radiusplugin, etc) ++ ++ * implemented, 14.1.10 * ++ ++6.) add new option "route-ipv6-gateway" ++ ++7.) add "full" gateway handling for IPv6 in route.c ++ (right now, the routes are just sent down the tun interface, if the ++ operating system in questions supports that, without care for the ++ gateway address - which does not work for gateways that are supposed ++ to point elsewhere. Also, it doesn't work for TAP interfaces. ++ ++8.) full IPv6 support for TAP interfaces ++ (main issue should be routes+gateway - and testing :-) ) ++ ++ test 2010/09/24: TAP itself works on linux/ifconfig+iproute2, but ++ route-via-tap doesn't work at all (route points to "tap0" which fails) ++ ++17:51:14.075412 fe:ab:6e:c5:53:71 > 33:33:ff:00:00:01, ethertype IPv6 (0x86dd), length 86: 2001:608:4:a053::1:0 > ff02::1:ff00:1: ICMP6, neighbor solicitation, who has 2001:608:4:a001::1, length 32 ++ ++ how is iroute-via-tap supposed to work?? ++ ++9.) verify that iroute-ipv6 and route-ipv6 interact in the same way as ++ documented for iroute/route: ++ ++ A's subnet, OpenVPN must push this route to all clients ++ EXCEPT for A, since the subnet is already owned by A. ++ OpenVPN accomplishes this by not ++ not pushing a route to a client ++ if it matches one of the client's iroutes. ++ ++10.) extend "ifconfig-ipv6" to handle specification of /netbits, pushing ++ of /netbits, and correctly ifconfig'ing this ++ (default, if not specified: /64) ++ ++11.) do not add ipv6-routes if tun-ipv6 is not set - complain instead ++ ++ * done * 12.1.10 ++ ++12.) handle incoming [::] and [fe80:...] packets in tun-p2mp MULTI mode ++ (most likely those are DAD packets) ++ silently ignore DAD? ++ Or accept-and-forward iff (multicast && client2client)? ++ handle NS/NA ++ ++13.) from Martin List-Petersen: ++ ++ One thing, and I guess this requires modifications in ++ network-manager-openvpn: It also works, BUT ignores "push ++ route-ipv6-gateway" and "push route-ipv6 ...." (obviously routes pushed ++ from the server) entirely. ++ ++14.) from ##openvpn-discussion: ++ ++ new features should be #ifdef'ed ++ ++ (check whether this is feasible at all) ++ ++15.) IPv6 related environment variables ++ ++ - document all of them in openvpn.8 ++ - make sure that all existing IPv4 stuff has IPv6 counterparts ++ ++16.) OpenBSD ++ - implement ifconfig/route for IPv6 ++ - revert ifconfig/open_tun order to "normal" (separate commit!!!) ++ (openvpn-devel, Subject: OpenBSD) ++ - test ++ ++17.) client-option (Elwood) ++ - ignore-v6-push-options yes/no ++ - ignore-v6-route-push ("as for IPv4 routes") ++ ++18.) fail-save? "what if 'ip -6 addr add' fails" -> fail, or fallback to v4? ++ (-> recomment setting "ignore-v6-push-options yes") ++ ++19.) safety check: if connecting over IPv6 (v6 transport) and the pushed ++ route-ipv6 network encompasses the server IPv6 address, make sure ++ we at least log a warning (until we can fiddle with external routing ++ to make this work correctly). ++ ++20.) show "route add" / "route delete" commands for IPv6 in log file ++ (we show the "ifconfig" commands, so why not the routes?) ++ ++ 2010-08-07: this is a null-feature - it's already there, but with ++ different debug level (M_INFO vs. D_ROUTE) so user ++ didn't notice ++ ++21.) enable ipv6-only server operations ++ - decouple ipv6 pool handling from ipv4 pool ++ - make sure Rest of OpenVPN doesn't assume "there will always be IPv4" ++ ++22.) implement --learn-address for IPv6 ++ ++23.) FreeBSD 8 seems to require explicit setting of the "ifconfig" IPv6 ++ route, while FreeBSD 6+7 don't --> more testing, and code fix ++ ++ workaround for the time being: just add ++ ++ server-ipv6 2001:608:4:a051::/64 ++ route-ipv6 2001:608:4:a051::/64 ++ ++ to the config ++ ++ (problem + workaround applies both to tun and tap style devices) +Index: openvpn-2.2.1/forward.c +=================================================================== +--- openvpn-2.2.1.orig/forward.c 2011-06-24 08:13:38.000000000 +0200 ++++ openvpn-2.2.1/forward.c 2011-12-13 12:24:54.611739529 +0100 +@@ -262,7 +262,8 @@ + static void + check_add_routes_action (struct context *c, const bool errors) + { +- do_route (&c->options, c->c1.route_list, c->c1.tuntap, c->plugins, c->c2.es); ++ do_route (&c->options, c->c1.route_list, c->c1.route_ipv6_list, ++ c->c1.tuntap, c->plugins, c->c2.es); + update_time (); + event_timeout_clear (&c->c2.route_wakeup); + event_timeout_clear (&c->c2.route_wakeup_expire); +Index: openvpn-2.2.1/helper.c +=================================================================== +--- openvpn-2.2.1.orig/helper.c 2011-06-24 08:13:38.000000000 +0200 ++++ openvpn-2.2.1/helper.c 2011-12-13 12:24:54.612739516 +0100 +@@ -142,6 +142,55 @@ + + #if P2MP + #if P2MP_SERVER ++ ++ /* ++ * ++ * HELPER DIRECTIVE for IPv6 ++ * ++ * server-ipv6 2001:db8::/64 ++ * ++ * EXPANDS TO: ++ * ++ * tun-ipv6 ++ * push "tun-ipv6" ++ * ifconfig-ipv6 2001:db8::1 2001:db8::2 ++ * if !nopool: ++ * ifconfig-ipv6-pool 2001:db8::1:0/64 ++ * ++ */ ++ if ( o->server_ipv6_defined ) ++ { ++ if ( ! o->server_defined ) ++ { ++ msg (M_USAGE, "--server-ipv6 must be used together with --server"); ++ } ++ if ( o->server_flags & SF_NOPOOL ) ++ { ++ msg( M_USAGE, "--server-ipv6 is incompatible with 'nopool' option" ); ++ } ++ if ( o->ifconfig_ipv6_pool_defined ) ++ { ++ msg( M_USAGE, "--server-ipv6 already defines an ifconfig-ipv6-pool, so you can't also specify --ifconfig-pool explicitly"); ++ } ++ ++ /* local ifconfig is "base address + 1" and "+2" */ ++ o->ifconfig_ipv6_local = ++ print_in6_addr( add_in6_addr( o->server_network_ipv6, 1), 0, &o->gc ); ++ o->ifconfig_ipv6_remote = ++ print_in6_addr( add_in6_addr( o->server_network_ipv6, 2), 0, &o->gc ); ++ ++ /* pool starts at "base address + 0x10000" */ ++ ASSERT( o->server_netbits_ipv6 < 96 ); /* want 32 bits */ ++ o->ifconfig_ipv6_pool_defined = true; ++ o->ifconfig_ipv6_pool_base = ++ add_in6_addr( o->server_network_ipv6, 0x10000 ); ++ o->ifconfig_ipv6_pool_netbits = o->server_netbits_ipv6; ++ ++ o->tun_ipv6 = true; ++ ++ push_option( o, "tun-ipv6", M_USAGE ); ++ } ++ + /* + * + * HELPER DIRECTIVE: +Index: openvpn-2.2.1/init.c +=================================================================== +--- openvpn-2.2.1.orig/init.c 2011-12-13 12:23:07.000000000 +0100 ++++ openvpn-2.2.1/init.c 2011-12-13 12:24:54.615739477 +0100 +@@ -843,7 +843,7 @@ + msg (M_FATAL|M_OPTERR, + "options --mktun or --rmtun should only be used together with --dev"); + tuncfg (options->dev, options->dev_type, options->dev_node, +- options->tun_ipv6, options->persist_mode, ++ options->persist_mode, + options->username, options->groupname, &options->tuntap_options); + if (options->persist_mode && options->lladdr) + set_lladdr(options->dev, options->lladdr, NULL); +@@ -1066,6 +1066,8 @@ + { + if (c->options.routes && !c->c1.route_list) + c->c1.route_list = new_route_list (c->options.max_routes, &c->gc); ++ if (c->options.routes_ipv6 && !c->c1.route_ipv6_list) ++ c->c1.route_ipv6_list = new_route_ipv6_list (c->options.max_routes, &c->gc); + } + + +@@ -1108,6 +1110,45 @@ + } + } + ++static void ++do_init_route_ipv6_list (const struct options *options, ++ struct route_ipv6_list *route_ipv6_list, ++ bool fatal, ++ struct env_set *es) ++{ ++ const char *gw = NULL; ++ int dev = dev_type_enum (options->dev, options->dev_type); ++ int metric = 0; ++ ++ if (dev != DEV_TYPE_TUN ) ++ msg( M_WARN, "IPv6 routes on TAP devices are going to fail on some platforms (need gateway spec)" ); /* TODO-GERT */ ++ ++ gw = options->ifconfig_ipv6_remote; /* default GW = remote end */ ++#if 0 /* not yet done for IPv6 - TODO!*/ ++ if ( options->route_ipv6_default_gateway ) /* override? */ ++ gw = options->route_ipv6_default_gateway; ++#endif ++ ++ if (options->route_default_metric) ++ metric = options->route_default_metric; ++ ++ if (!init_route_ipv6_list (route_ipv6_list, ++ options->routes_ipv6, ++ gw, ++ metric, ++ es)) ++ { ++ if (fatal) ++ openvpn_exit (OPENVPN_EXIT_STATUS_ERROR); /* exit point */ ++ } ++ else ++ { ++ /* copy routes to environment */ ++ setenv_routes_ipv6 (es, route_ipv6_list); ++ } ++} ++ ++ + /* + * Called after all initialization has been completed. + */ +@@ -1177,12 +1218,13 @@ + void + do_route (const struct options *options, + struct route_list *route_list, ++ struct route_ipv6_list *route_ipv6_list, + const struct tuntap *tt, + const struct plugin_list *plugins, + struct env_set *es) + { +- if (!options->route_noexec && route_list) +- add_routes (route_list, tt, ROUTE_OPTION_FLAGS (options), es); ++ if (!options->route_noexec && ( route_list || route_ipv6_list ) ) ++ add_routes (route_list, route_ipv6_list, tt, ROUTE_OPTION_FLAGS (options), es); + + if (plugin_defined (plugins, OPENVPN_PLUGIN_ROUTE_UP)) + { +@@ -1239,11 +1281,16 @@ + c->options.topology, + c->options.ifconfig_local, + c->options.ifconfig_remote_netmask, ++ c->options.ifconfig_ipv6_local, ++ c->options.ifconfig_ipv6_remote, + addr_host (&c->c1.link_socket_addr.local), + addr_host (&c->c1.link_socket_addr.remote), + !c->options.ifconfig_nowarn, + c->c2.es); + ++ /* flag tunnel for IPv6 config if --tun-ipv6 is set */ ++ c->c1.tuntap->ipv6 = c->options.tun_ipv6; ++ + init_tun_post (c->c1.tuntap, + &c->c2.frame, + &c->options.tuntap_options); +@@ -1275,6 +1322,8 @@ + /* parse and resolve the route option list */ + if (c->options.routes && c->c1.route_list && c->c2.link_socket) + do_init_route_list (&c->options, c->c1.route_list, &c->c2.link_socket->info, false, c->c2.es); ++ if (c->options.routes_ipv6 && c->c1.route_ipv6_list ) ++ do_init_route_ipv6_list (&c->options, c->c1.route_ipv6_list, false, c->c2.es); + + /* do ifconfig */ + if (!c->options.ifconfig_noexec +@@ -1291,7 +1340,7 @@ + + /* open the tun device */ + open_tun (c->options.dev, c->options.dev_type, c->options.dev_node, +- c->options.tun_ipv6, c->c1.tuntap); ++ c->c1.tuntap); + + /* set the hardware address */ + if (c->options.lladdr) +@@ -1320,7 +1369,8 @@ + + /* possibly add routes */ + if (!c->options.route_delay_defined) +- do_route (&c->options, c->c1.route_list, c->c1.tuntap, c->plugins, c->c2.es); ++ do_route (&c->options, c->c1.route_list, c->c1.route_ipv6_list, ++ c->c1.tuntap, c->plugins, c->c2.es); + + /* + * Did tun/tap driver give us an MTU? +@@ -1394,8 +1444,9 @@ + #endif + + /* delete any routes we added */ +- if (c->c1.route_list) +- delete_routes (c->c1.route_list, c->c1.tuntap, ROUTE_OPTION_FLAGS (&c->options), c->c2.es); ++ if (c->c1.route_list || c->c1.route_ipv6_list ) ++ delete_routes (c->c1.route_list, c->c1.route_ipv6_list, ++ c->c1.tuntap, ROUTE_OPTION_FLAGS (&c->options), c->c2.es); + + /* actually close tun/tap device based on --down-pre flag */ + if (!c->options.down_pre) +Index: openvpn-2.2.1/init.h +=================================================================== +--- openvpn-2.2.1.orig/init.h 2011-06-24 08:13:38.000000000 +0200 ++++ openvpn-2.2.1/init.h 2011-12-13 12:24:54.615739477 +0100 +@@ -63,6 +63,7 @@ + + void do_route (const struct options *options, + struct route_list *route_list, ++ struct route_ipv6_list *route_ipv6_list, + const struct tuntap *tt, + const struct plugin_list *plugins, + struct env_set *es); +Index: openvpn-2.2.1/misc.c +=================================================================== +--- openvpn-2.2.1.orig/misc.c 2011-06-24 08:13:38.000000000 +0200 ++++ openvpn-2.2.1/misc.c 2011-12-13 12:24:54.617739452 +0100 +@@ -1001,7 +1001,9 @@ + { + const char *str = construct_name_value (name_tmp, val_tmp, &gc); + env_set_add (es, str); +- /*msg (M_INFO, "SETENV_ES '%s'", str);*/ ++#if DEBUG_VERBOSE_SETENV ++ msg (M_INFO, "SETENV_ES '%s'", str); ++#endif + } + else + env_set_del (es, name_tmp); +Index: openvpn-2.2.1/mroute.c +=================================================================== +--- openvpn-2.2.1.orig/mroute.c 2011-12-13 12:23:07.000000000 +0100 ++++ openvpn-2.2.1/mroute.c 2011-12-13 12:24:54.618739440 +0100 +@@ -88,12 +88,33 @@ + } + } + ++static inline void ++mroute_get_in6_addr (struct mroute_addr *ma, const struct in6_addr src, unsigned int mask) ++{ ++ if (ma) ++ { ++ ma->type = MR_ADDR_IPV6 | mask; ++ ma->netbits = 0; ++ ma->len = 16; ++ *(struct in6_addr *)ma->addr = src; ++ } ++} ++ + static inline bool + mroute_is_mcast (const in_addr_t addr) + { + return ((addr & htonl(IP_MCAST_SUBNET_MASK)) == htonl(IP_MCAST_NETWORK)); + } + ++/* RFC 4291, 2.7, "binary 11111111 at the start of an address identifies ++ * the address as being a multicast address" ++ */ ++static inline bool ++mroute_is_mcast_ipv6 (const struct in6_addr addr) ++{ ++ return (addr.s6_addr[0] == 0xff); ++} ++ + #ifdef ENABLE_PF + + static unsigned int +@@ -155,10 +176,29 @@ + } + break; + case 6: +- { +- msg (M_WARN, "Need IPv6 code in mroute_extract_addr_from_packet"); +- break; +- } ++ if (BLEN (buf) >= (int) sizeof (struct openvpn_ipv6hdr)) ++ { ++ const struct openvpn_ipv6hdr *ipv6 = (const struct openvpn_ipv6hdr *) BPTR (buf); ++#if 0 /* very basic debug */ ++ struct gc_arena gc = gc_new (); ++ msg( M_INFO, "IPv6 packet! src=%s, dst=%s", ++ print_in6_addr( ipv6->saddr, 0, &gc ), ++ print_in6_addr( ipv6->daddr, 0, &gc )); ++ gc_free (&gc); ++#endif ++ ++ mroute_get_in6_addr (src, ipv6->saddr, 0); ++ mroute_get_in6_addr (dest, ipv6->daddr, 0); ++ ++ if (mroute_is_mcast_ipv6 (ipv6->daddr)) ++ ret |= MROUTE_EXTRACT_MCAST; ++ ++ ret |= MROUTE_EXTRACT_SUCCEEDED; ++ } ++ break; ++ default: ++ msg (M_WARN, "IP packet with unknown IP version=%d seen", ++ OPENVPN_IPH_GET_VER (*BPTR(buf))); + } + } + return ret; +@@ -274,14 +314,36 @@ + * Zero off the host bits in an address, leaving + * only the network bits, using the netbits member of + * struct mroute_addr as the controlling parameter. ++ * ++ * TODO: this is called for route-lookup for every yet-unhashed ++ * destination address, so for lots of active net-iroutes, this ++ * might benefit from some "zeroize 32 bit at a time" improvements + */ + void + mroute_addr_mask_host_bits (struct mroute_addr *ma) + { + in_addr_t addr = ntohl(*(in_addr_t*)ma->addr); +- ASSERT ((ma->type & MR_ADDR_MASK) == MR_ADDR_IPV4); +- addr &= netbits_to_netmask (ma->netbits); +- *(in_addr_t*)ma->addr = htonl (addr); ++ if ((ma->type & MR_ADDR_MASK) == MR_ADDR_IPV4) ++ { ++ addr &= netbits_to_netmask (ma->netbits); ++ *(in_addr_t*)ma->addr = htonl (addr); ++ } ++ else if ((ma->type & MR_ADDR_MASK) == MR_ADDR_IPV6) ++ { ++ int byte = ma->len-1; /* rightmost byte in address */ ++ int bits_to_clear = 128 - ma->netbits; ++ ++ while( byte >= 0 && bits_to_clear > 0 ) ++ { ++ if ( bits_to_clear >= 8 ) ++ { ma->addr[byte--] = 0; bits_to_clear -= 8; } ++ else ++ { ma->addr[byte--] &= (~0 << bits_to_clear); bits_to_clear = 0; } ++ } ++ ASSERT( bits_to_clear == 0 ); ++ } ++ else ++ ASSERT(0); + } + + /* +@@ -359,17 +421,24 @@ + } + break; + case MR_ADDR_IPV6: +- buf_printf (&out, "IPV6"); +- break; +- default: +- buf_printf (&out, "UNKNOWN"); +- break; +- } +- return BSTR (&out); +- } +- else +- return "[NULL]"; +-} ++ { ++ buf_printf (&out, "%s", ++ print_in6_addr( *(struct in6_addr*)&maddr.addr, 0, gc)); ++ if (maddr.type & MR_WITH_NETBITS) ++ { ++ buf_printf (&out, "/%d", maddr.netbits); ++ } ++ } ++ break; ++ default: ++ buf_printf (&out, "UNKNOWN"); ++ break; ++ } ++ return BSTR (&out); ++ } ++ else ++ return "[NULL]"; ++ } + + /* + * mroute_helper's main job is keeping track of +@@ -439,6 +508,40 @@ + mroute_helper_regenerate (mh); + } + } ++ ++/* this is a bit inelegant, we really should have a helper to that ++ * is only passed the netbits value, and not the whole struct iroute * ++ * - thus one helper could do IPv4 and IPv6. For the sake of "not change ++ * code unrelated to IPv4" this is left for later cleanup, for now. ++ */ ++void ++mroute_helper_add_iroute6 (struct mroute_helper *mh, ++ const struct iroute_ipv6 *ir6) ++{ ++ if (ir6->netbits >= 0) ++ { ++ ASSERT (ir6->netbits < MR_HELPER_NET_LEN); ++ ++mh->cache_generation; ++ ++mh->net_len_refcount[ir6->netbits]; ++ if (mh->net_len_refcount[ir6->netbits] == 1) ++ mroute_helper_regenerate (mh); ++ } ++} ++ ++void ++mroute_helper_del_iroute6 (struct mroute_helper *mh, ++ const struct iroute_ipv6 *ir6) ++{ ++ if (ir6->netbits >= 0) ++ { ++ ASSERT (ir6->netbits < MR_HELPER_NET_LEN); ++ ++mh->cache_generation; ++ --mh->net_len_refcount[ir6->netbits]; ++ ASSERT (mh->net_len_refcount[ir6->netbits] >= 0); ++ if (!mh->net_len_refcount[ir6->netbits]) ++ mroute_helper_regenerate (mh); ++ } ++} + + void + mroute_helper_free (struct mroute_helper *mh) +Index: openvpn-2.2.1/mroute.h +=================================================================== +--- openvpn-2.2.1.orig/mroute.h 2011-06-24 08:13:38.000000000 +0200 ++++ openvpn-2.2.1/mroute.h 2011-12-13 12:24:54.618739440 +0100 +@@ -85,7 +85,7 @@ + /* + * Number of bits in an address. Should be raised for IPv6. + */ +-#define MR_HELPER_NET_LEN 32 ++#define MR_HELPER_NET_LEN 129 + + /* + * Used to help maintain CIDR routing table. +@@ -127,6 +127,8 @@ + void mroute_helper_free (struct mroute_helper *mh); + void mroute_helper_add_iroute (struct mroute_helper *mh, const struct iroute *ir); + void mroute_helper_del_iroute (struct mroute_helper *mh, const struct iroute *ir); ++void mroute_helper_add_iroute6 (struct mroute_helper *mh, const struct iroute_ipv6 *ir6); ++void mroute_helper_del_iroute6 (struct mroute_helper *mh, const struct iroute_ipv6 *ir6); + + /* + * Given a raw packet in buf, return the src and dest +Index: openvpn-2.2.1/multi.c +=================================================================== +--- openvpn-2.2.1.orig/multi.c 2011-12-13 12:23:07.000000000 +0100 ++++ openvpn-2.2.1/multi.c 2011-12-13 12:24:54.621739404 +0100 +@@ -316,25 +316,18 @@ + */ + if (t->options.ifconfig_pool_defined) + { +- if (dev == DEV_TYPE_TAP) +- { +- m->ifconfig_pool = ifconfig_pool_init (IFCONFIG_POOL_INDIV, +- t->options.ifconfig_pool_start, +- t->options.ifconfig_pool_end, +- t->options.duplicate_cn); +- } +- else if (dev == DEV_TYPE_TUN) +- { +- m->ifconfig_pool = ifconfig_pool_init ( +- (t->options.topology == TOP_NET30) ? IFCONFIG_POOL_30NET : IFCONFIG_POOL_INDIV, +- t->options.ifconfig_pool_start, +- t->options.ifconfig_pool_end, +- t->options.duplicate_cn); +- } +- else +- { +- ASSERT (0); +- } ++ int pool_type = IFCONFIG_POOL_INDIV; ++ ++ if ( dev == DEV_TYPE_TUN && t->options.topology == TOP_NET30 ) ++ pool_type = IFCONFIG_POOL_30NET; ++ ++ m->ifconfig_pool = ifconfig_pool_init (pool_type, ++ t->options.ifconfig_pool_start, ++ t->options.ifconfig_pool_end, ++ t->options.duplicate_cn, ++ t->options.ifconfig_ipv6_pool_defined, ++ t->options.ifconfig_ipv6_pool_base, ++ t->options.ifconfig_ipv6_pool_netbits ); + + /* reload pool data from file */ + if (t->c1.ifconfig_pool_persist) +@@ -429,10 +422,14 @@ + struct multi_instance *mi) + { + const struct iroute *ir; ++ const struct iroute_ipv6 *ir6; + if (TUNNEL_TYPE (mi->context.c1.tuntap) == DEV_TYPE_TUN) + { + for (ir = mi->context.options.iroutes; ir != NULL; ir = ir->next) + mroute_helper_del_iroute (m->route_helper, ir); ++ ++ for ( ir6 = mi->context.options.iroutes_ipv6; ir6 != NULL; ir6 = ir6->next ) ++ mroute_helper_del_iroute6 (m->route_helper, ir6); + } + } + +@@ -1078,6 +1075,37 @@ + } + } + ++static struct multi_instance * ++multi_learn_in6_addr (struct multi_context *m, ++ struct multi_instance *mi, ++ struct in6_addr a6, ++ int netbits, /* -1 if host route, otherwise # of network bits in address */ ++ bool primary) ++{ ++ struct mroute_addr addr; ++ ++ addr.len = 16; ++ addr.type = MR_ADDR_IPV6; ++ addr.netbits = 0; ++ memcpy( &addr.addr, &a6, sizeof(a6) ); ++ ++ if (netbits >= 0) ++ { ++ addr.type |= MR_WITH_NETBITS; ++ addr.netbits = (uint8_t) netbits; ++ mroute_addr_mask_host_bits( &addr ); ++ } ++ ++ { ++ struct multi_instance *owner = multi_learn_addr (m, mi, &addr, 0); ++#ifdef MANAGEMENT_DEF_AUTH ++ if (management && owner) ++ management_learn_addr (management, &mi->context.c2.mda_context, &addr, primary); ++#endif ++ return owner; ++ } ++} ++ + /* + * A new client has connected, add routes (server -> client) + * to internal routing table. +@@ -1088,6 +1116,7 @@ + { + struct gc_arena gc = gc_new (); + const struct iroute *ir; ++ const struct iroute_ipv6 *ir6; + if (TUNNEL_TYPE (mi->context.c1.tuntap) == DEV_TYPE_TUN) + { + mi->did_iroutes = true; +@@ -1107,6 +1136,22 @@ + + multi_learn_in_addr_t (m, mi, ir->network, ir->netbits, false); + } ++ for ( ir6 = mi->context.options.iroutes_ipv6; ir6 != NULL; ir6 = ir6->next ) ++ { ++ if (ir6->netbits >= 0) ++ msg (D_MULTI_LOW, "MULTI: internal route %s/%d -> %s", ++ print_in6_addr (ir6->network, 0, &gc), ++ ir6->netbits, ++ multi_instance_string (mi, false, &gc)); ++ else ++ msg (D_MULTI_LOW, "MULTI: internal route %s -> %s", ++ print_in6_addr (ir6->network, 0, &gc), ++ multi_instance_string (mi, false, &gc)); ++ ++ mroute_helper_add_iroute6 (m->route_helper, ir6); ++ ++ multi_learn_in6_addr (m, mi, ir6->network, ir6->netbits, false); ++ } + } + gc_free (&gc); + } +@@ -1192,21 +1237,37 @@ + mi->context.c2.push_ifconfig_defined = true; + mi->context.c2.push_ifconfig_local = mi->context.options.push_ifconfig_local; + mi->context.c2.push_ifconfig_remote_netmask = mi->context.options.push_ifconfig_remote_netmask; ++ ++ /* the current implementation does not allow "static IPv4, pool IPv6", ++ * (see below) so issue a warning if that happens - don't break the ++ * session, though, as we don't even know if this client WANTS IPv6 ++ */ ++ if ( mi->context.c1.tuntap->ipv6 && ++ mi->context.options.ifconfig_ipv6_pool_defined && ++ ! mi->context.options.push_ifconfig_ipv6_defined ) ++ { ++ msg( M_INFO, "MULTI_sva: WARNING: if --ifconfig-push is used for IPv4, automatic IPv6 assignment from --ifconfig-ipv6-pool does not work. Use --ifconfig-ipv6-push for IPv6 then." ); ++ } + } + else if (m->ifconfig_pool && mi->vaddr_handle < 0) /* otherwise, choose a pool address */ + { + in_addr_t local=0, remote=0; ++ struct in6_addr remote_ipv6; + const char *cn = NULL; + + if (!mi->context.options.duplicate_cn) + cn = tls_common_name (mi->context.c2.tls_multi, true); + +- mi->vaddr_handle = ifconfig_pool_acquire (m->ifconfig_pool, &local, &remote, cn); ++ mi->vaddr_handle = ifconfig_pool_acquire (m->ifconfig_pool, &local, &remote, &remote_ipv6, cn); + if (mi->vaddr_handle >= 0) + { + const int tunnel_type = TUNNEL_TYPE (mi->context.c1.tuntap); + const int tunnel_topology = TUNNEL_TOPOLOGY (mi->context.c1.tuntap); + ++ msg( M_INFO, "MULTI_sva: pool returned IPv4=%s, IPv6=%s", ++ print_in_addr_t( remote, 0, &gc ), ++ print_in6_addr( remote_ipv6, 0, &gc ) ); ++ + /* set push_ifconfig_remote_netmask from pool ifconfig address(es) */ + mi->context.c2.push_ifconfig_local = remote; + if (tunnel_type == DEV_TYPE_TAP || (tunnel_type == DEV_TYPE_TUN && tunnel_topology == TOP_SUBNET)) +@@ -1228,12 +1289,46 @@ + else + msg (D_MULTI_ERRORS, "MULTI: no --ifconfig-pool netmask parameter is available to push to %s", + multi_instance_string (mi, false, &gc)); ++ ++ if ( mi->context.options.ifconfig_ipv6_pool_defined ) ++ { ++ mi->context.c2.push_ifconfig_ipv6_local = remote_ipv6; ++ mi->context.c2.push_ifconfig_ipv6_remote = ++ mi->context.c1.tuntap->local_ipv6; ++ mi->context.c2.push_ifconfig_ipv6_netbits = ++ mi->context.options.ifconfig_ipv6_pool_netbits; ++ mi->context.c2.push_ifconfig_ipv6_defined = true; ++ } + } + else + { + msg (D_MULTI_ERRORS, "MULTI: no free --ifconfig-pool addresses are available"); + } + } ++ ++ /* IPv6 push_ifconfig is a bit problematic - since IPv6 shares the ++ * pool handling with IPv4, the combination "static IPv4, dynamic IPv6" ++ * will fail (because no pool will be allocated in this case). ++ * OTOH, this doesn't make too much sense in reality - and the other ++ * way round ("dynamic IPv4, static IPv6") or "both static" makes sense ++ * -> and so it's implemented right now ++ */ ++ if ( mi->context.c1.tuntap->ipv6 && ++ mi->context.options.push_ifconfig_ipv6_defined ) ++ { ++ mi->context.c2.push_ifconfig_ipv6_local = ++ mi->context.options.push_ifconfig_ipv6_local; ++ mi->context.c2.push_ifconfig_ipv6_remote = ++ mi->context.options.push_ifconfig_ipv6_remote; ++ mi->context.c2.push_ifconfig_ipv6_netbits = ++ mi->context.options.push_ifconfig_ipv6_netbits; ++ mi->context.c2.push_ifconfig_ipv6_defined = true; ++ ++ msg( M_INFO, "MULTI_sva: push_ifconfig_ipv6 %s/%d", ++ print_in6_addr( mi->context.c2.push_ifconfig_ipv6_local, 0, &gc ), ++ mi->context.c2.push_ifconfig_ipv6_netbits ); ++ } ++ + gc_free (&gc); + } + +@@ -1272,6 +1367,11 @@ + SA_SET_IF_NONZERO); + } + } ++ ++ /* TODO: I'm not exactly sure what these environment variables are ++ * used for, but if we have them for IPv4, we should also have ++ * them for IPv6, no? ++ */ + } + + /* +@@ -1661,6 +1761,15 @@ + print_in_addr_t (mi->context.c2.push_ifconfig_local, 0, &gc)); + } + ++ if (mi->context.c2.push_ifconfig_ipv6_defined) ++ { ++ multi_learn_in6_addr (m, mi, mi->context.c2.push_ifconfig_ipv6_local, -1, true); ++ /* TODO: find out where addresses are "unlearned"!! */ ++ msg (D_MULTI_LOW, "MULTI: primary virtual IPv6 for %s: %s", ++ multi_instance_string (mi, false, &gc), ++ print_in6_addr (mi->context.c2.push_ifconfig_ipv6_local, 0, &gc)); ++ } ++ + /* add routes locally, pointing to new client, if + --iroute options have been specified */ + multi_add_iroutes (m, mi); +Index: openvpn-2.2.1/openvpn.8 +=================================================================== +--- openvpn-2.2.1.orig/openvpn.8 2011-12-13 12:24:20.000000000 +0100 ++++ openvpn-2.2.1/openvpn.8 2011-12-13 12:24:54.628739315 +0100 +@@ -794,6 +794,8 @@ + .B \-\-dev tunX. + A warning will be displayed + if no specific IPv6 TUN support for your OS has been compiled into OpenVPN. ++ ++See below for further IPv6-related configuration options. + .\"********************************************************* + .TP + .B \-\-dev-node node +@@ -4949,6 +4951,57 @@ + .B \-\-verb + option can be used BEFORE this option to produce debugging information. + .\"********************************************************* ++.SS IPv6 Related Options ++.\"********************************************************* ++The following options exist to support IPv6 tunneling in peer-to-peer ++and client-server mode. As of now, this is just very basic ++documentation of the IPv6-related options. More documentation can be ++found on http://www.greenie.net/ipv6/openvpn.html. ++.TP ++.B --ifconfig-ipv6 ipv6addr/bits ipv6remote ++configure IPv6 address ++.B ipv6addr/bits ++on the ``tun'' device. The second parameter is used as route target for ++.B --route-ipv6 ++if no gateway is specified. ++.TP ++.B --route-ipv6 ipv6addr/bits [gateway] [metric] ++setup IPv6 routing in the system to send the specified IPv6 network ++into OpenVPN's ``tun'' device ++.TP ++.B --server-ipv6 ipv6addr/bits ++convenience-function to enable a number of IPv6 related options at ++once, namely ++.B --ifconfig-ipv6, --ifconfig-ipv6-pool, --tun-ipv6 ++and ++.B --push tun-ipv6 ++Is only accepted if ``--mode server'' or ``--server'' is set. ++.TP ++.B --ifconfig-ipv6-pool ipv6addr/bits ++Specify an IPv6 address pool for dynamic assignment to clients. The ++pool starts at ++.B ipv6addr ++and increments by +1 for every new client (linear mode). The ++.B /bits ++setting controls the size of the pool. ++.TP ++.B --ifconfig-ipv6-push ipv6addr/bits ipv6remote ++for ccd/ per-client static IPv6 interface configuration, see ++.B --client-config-dir ++and ++.B --ifconfig-push ++for more details. ++.TP ++.B --iroute-ipv6 ipv6addr/bits ++for ccd/ per-client static IPv6 route configuration, see ++.B --iroute ++for more details how to setup and use this, and how ++.B --iroute ++and ++.B --route ++interact. ++ ++.\"********************************************************* + .SH SCRIPTING AND ENVIRONMENTAL VARIABLES + OpenVPN exports a series + of environmental variables for use by user-defined scripts. +Index: openvpn-2.2.1/openvpn.h +=================================================================== +--- openvpn-2.2.1.orig/openvpn.h 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/openvpn.h 2011-12-13 12:24:54.629739303 +0100 +@@ -165,6 +165,9 @@ + /* list of --route directives */ + struct route_list *route_list; + ++ /* list of --route-ipv6 directives */ ++ struct route_ipv6_list *route_ipv6_list; ++ + /* --status file */ + struct status_output *status_output; + bool status_output_owned; +@@ -417,6 +420,11 @@ + in_addr_t push_ifconfig_local; + in_addr_t push_ifconfig_remote_netmask; + ++ bool push_ifconfig_ipv6_defined; ++ struct in6_addr push_ifconfig_ipv6_local; ++ int push_ifconfig_ipv6_netbits; ++ struct in6_addr push_ifconfig_ipv6_remote; ++ + /* client authentication state, CAS_SUCCEEDED must be 0 */ + # define CAS_SUCCEEDED 0 + # define CAS_PENDING 1 +Index: openvpn-2.2.1/options.c +=================================================================== +--- openvpn-2.2.1.orig/options.c 2011-12-13 12:23:07.000000000 +0100 ++++ openvpn-2.2.1/options.c 2011-12-13 12:24:54.635739227 +0100 +@@ -85,6 +85,7 @@ + #ifdef USE_PF_INET6 + " [PF_INET6]" + #endif ++ " [IPv6 payload 20110424-2 (2.2RC2)]" + " built on " __DATE__ + ; + +@@ -181,6 +182,8 @@ + " addresses outside of the subnets used by either peer.\n" + " TAP: configure device to use IP address l as a local\n" + " endpoint and rn as a subnet mask.\n" ++ "--ifconfig-ipv6 l r : configure device to use IPv6 address l as local\n" ++ " endpoint (as a /64) and r as remote endpoint\n" + "--ifconfig-noexec : Don't actually execute ifconfig/netsh command, instead\n" + " pass --ifconfig parms by environment to scripts.\n" + "--ifconfig-nowarn : Don't warn if the --ifconfig option on this side of the\n" +@@ -191,6 +194,10 @@ + " netmask default: 255.255.255.255\n" + " gateway default: taken from --route-gateway or --ifconfig\n" + " Specify default by leaving blank or setting to \"nil\".\n" ++ "--route-ipv6 network/bits [gateway] [metric] :\n" ++ " Add IPv6 route to routing table after connection\n" ++ " is established. Multiple routes can be specified.\n" ++ " gateway default: taken from --route-ipv6-gateway or --ifconfig\n" + "--max-routes n : Specify the maximum number of routes that may be defined\n" + " or pulled from a server.\n" + "--route-gateway gw|'dhcp' : Specify a default gateway for use with --route.\n" +@@ -379,6 +386,7 @@ + "\n" + "Multi-Client Server options (when --mode server is used):\n" + "--server network netmask : Helper option to easily configure server mode.\n" ++ "--server-ipv6 network/bits : Configure IPv6 server mode.\n" + "--server-bridge [IP netmask pool-start-IP pool-end-IP] : Helper option to\n" + " easily configure ethernet bridging server mode.\n" + "--push \"option\" : Push a config file option back to the peer for remote\n" +@@ -392,10 +400,16 @@ + "--ifconfig-pool-persist file [seconds] : Persist/unpersist ifconfig-pool\n" + " data to file, at seconds intervals (default=600).\n" + " If seconds=0, file will be treated as read-only.\n" ++ "--ifconfig-ipv6-pool base-IP/bits : set aside an IPv6 network block\n" ++ " to be dynamically allocated to connecting clients.\n" + "--ifconfig-push local remote-netmask : Push an ifconfig option to remote,\n" + " overrides --ifconfig-pool dynamic allocation.\n" + " Only valid in a client-specific config file.\n" ++ "--ifconfig-ipv6-push local/bits remote : Push an ifconfig-ipv6 option to\n" ++ " remote, overrides --ifconfig-ipv6-pool allocation.\n" ++ " Only valid in a client-specific config file.\n" + "--iroute network [netmask] : Route subnet to client.\n" ++ "--iroute-ipv6 network/bits : Route IPv6 subnet to client.\n" + " Sets up internal routes only.\n" + " Only valid in a client-specific config file.\n" + "--disable : Client is disabled.\n" +@@ -880,6 +894,78 @@ + return ret; + } + ++/* helper: parse a text string containing an IPv6 address + netbits ++ * in "standard format" (2001:dba::/32) ++ * "/nn" is optional, default to /64 if missing ++ * ++ * return true if parsing succeeded, modify *network and *netbits ++ * return address part without "/nn" in *printable_ipv6 (if != NULL) ++ */ ++bool ++get_ipv6_addr( const char * prefix_str, struct in6_addr *network, ++ unsigned int * netbits, char ** printable_ipv6, int msglevel ) ++{ ++ int rc; ++ char * sep, * endp; ++ int bits; ++ struct in6_addr t_network; ++ ++ sep = strchr( prefix_str, '/' ); ++ if ( sep == NULL ) ++ { ++ bits = 64; ++ } ++ else ++ { ++ bits = strtol( sep+1, &endp, 10 ); ++ if ( *endp != '\0' || bits < 0 || bits > 128 ) ++ { ++ msg (msglevel, "IPv6 prefix '%s': invalid '/bits' spec", prefix_str); ++ return false; ++ } ++ } ++ ++ /* temporary replace '/' in caller-provided string with '\0', otherwise ++ * inet_pton() will refuse prefix string ++ * (alternative would be to strncpy() the prefix to temporary buffer) ++ */ ++ ++ if ( sep != NULL ) *sep = '\0'; ++ ++ rc = inet_pton( AF_INET6, prefix_str, &t_network ); ++ ++ if ( rc == 1 && printable_ipv6 != NULL ) ++ { ++ *printable_ipv6 = string_alloc( prefix_str, NULL ); ++ } ++ ++ if ( sep != NULL ) *sep = '/'; ++ ++ if ( rc != 1 ) ++ { ++ msg (msglevel, "IPv6 prefix '%s': invalid IPv6 address", prefix_str); ++ return false; ++ } ++ ++ if ( netbits != NULL ) ++ { ++ *netbits = bits; ++ } ++ if ( network != NULL ) ++ { ++ *network = t_network; ++ } ++ return true; /* parsing OK, values set */ ++} ++ ++static bool ipv6_addr_safe_hexplusbits( const char * ipv6_prefix_spec ) ++{ ++ struct in6_addr t_addr; ++ unsigned int t_bits; ++ ++ return get_ipv6_addr( ipv6_prefix_spec, &t_addr, &t_bits, NULL, M_WARN ); ++} ++ + static char * + string_substitute (const char *src, int from, int to, struct gc_arena *gc) + { +@@ -998,6 +1084,8 @@ + #if P2MP_SERVER + msg (D_SHOW_PARMS, " server_network = %s", print_in_addr_t (o->server_network, 0, &gc)); + msg (D_SHOW_PARMS, " server_netmask = %s", print_in_addr_t (o->server_netmask, 0, &gc)); ++ msg (D_SHOW_PARMS, " server_network_ipv6 = %s", print_in6_addr (o->server_network_ipv6, 0, &gc) ); ++ SHOW_INT (server_netbits_ipv6); + msg (D_SHOW_PARMS, " server_bridge_ip = %s", print_in_addr_t (o->server_bridge_ip, 0, &gc)); + msg (D_SHOW_PARMS, " server_bridge_netmask = %s", print_in_addr_t (o->server_bridge_netmask, 0, &gc)); + msg (D_SHOW_PARMS, " server_bridge_pool_start = %s", print_in_addr_t (o->server_bridge_pool_start, 0, &gc)); +@@ -1018,6 +1106,9 @@ + msg (D_SHOW_PARMS, " ifconfig_pool_netmask = %s", print_in_addr_t (o->ifconfig_pool_netmask, 0, &gc)); + SHOW_STR (ifconfig_pool_persist_filename); + SHOW_INT (ifconfig_pool_persist_refresh_freq); ++ SHOW_BOOL (ifconfig_ipv6_pool_defined); ++ msg (D_SHOW_PARMS, " ifconfig_ipv6_pool_base = %s", print_in6_addr (o->ifconfig_ipv6_pool_base, 0, &gc)); ++ SHOW_INT (ifconfig_ipv6_pool_netbits); + SHOW_INT (n_bcast_buf); + SHOW_INT (tcp_queue_limit); + SHOW_INT (real_hash_size); +@@ -1031,6 +1122,9 @@ + SHOW_BOOL (push_ifconfig_defined); + msg (D_SHOW_PARMS, " push_ifconfig_local = %s", print_in_addr_t (o->push_ifconfig_local, 0, &gc)); + msg (D_SHOW_PARMS, " push_ifconfig_remote_netmask = %s", print_in_addr_t (o->push_ifconfig_remote_netmask, 0, &gc)); ++ SHOW_BOOL (push_ifconfig_ipv6_defined); ++ msg (D_SHOW_PARMS, " push_ifconfig_ipv6_local = %s/%d", print_in6_addr (o->push_ifconfig_ipv6_local, 0, &gc), o->push_ifconfig_ipv6_netbits ); ++ msg (D_SHOW_PARMS, " push_ifconfig_ipv6_remote = %s", print_in6_addr (o->push_ifconfig_ipv6_remote, 0, &gc)); + SHOW_BOOL (enable_c2c); + SHOW_BOOL (duplicate_cn); + SHOW_INT (cf_max); +@@ -1085,6 +1179,25 @@ + o->iroutes = ir; + } + ++static void ++option_iroute_ipv6 (struct options *o, ++ const char *prefix_str, ++ int msglevel) ++{ ++ struct iroute_ipv6 *ir; ++ ++ ALLOC_OBJ_GC (ir, struct iroute_ipv6, &o->gc); ++ ++ if ( get_ipv6_addr (prefix_str, &ir->network, &ir->netbits, NULL, msglevel ) < 0 ) ++ { ++ msg (msglevel, "in --iroute-ipv6 %s: Bad IPv6 prefix specification", ++ prefix_str); ++ return; ++ } ++ ++ ir->next = o->iroutes_ipv6; ++ o->iroutes_ipv6 = ir; ++} + #endif /* P2MP_SERVER */ + #endif /* P2MP */ + +@@ -1122,6 +1235,13 @@ + options->routes = new_route_option_list (options->max_routes, &options->gc); + } + ++void ++rol6_check_alloc (struct options *options) ++{ ++ if (!options->routes_ipv6) ++ options->routes_ipv6 = new_route_ipv6_option_list (options->max_routes, &options->gc); ++} ++ + #ifdef ENABLE_DEBUG + static void + show_connection_entry (const struct connection_entry *o) +@@ -1212,6 +1332,9 @@ + SHOW_STR (ifconfig_remote_netmask); + SHOW_BOOL (ifconfig_noexec); + SHOW_BOOL (ifconfig_nowarn); ++ SHOW_STR (ifconfig_ipv6_local); ++ SHOW_INT (ifconfig_ipv6_netbits); ++ SHOW_STR (ifconfig_ipv6_remote); + + #ifdef HAVE_GETTIMEOFDAY + SHOW_INT (shaper); +@@ -1915,8 +2038,10 @@ + if (options->connection_list) + msg (M_USAGE, "<connection> cannot be used with --mode server"); + #endif ++#if 0 + if (options->tun_ipv6) + msg (M_USAGE, "--tun-ipv6 cannot be used with --mode server"); ++#endif + if (options->shaper) + msg (M_USAGE, "--shaper cannot be used with --mode server"); + if (options->inetd) +@@ -1949,6 +2074,11 @@ + msg (M_USAGE, "--up-delay cannot be used with --mode server"); + if (!options->ifconfig_pool_defined && options->ifconfig_pool_persist_filename) + msg (M_USAGE, "--ifconfig-pool-persist must be used with --ifconfig-pool"); ++ if (options->ifconfig_ipv6_pool_defined && !options->ifconfig_ipv6_local ) ++ msg (M_USAGE, "--ifconfig-ipv6-pool needs --ifconfig-ipv6"); ++ if (options->ifconfig_ipv6_local && !options->tun_ipv6 ) ++ msg (M_INFO, "Warning: --ifconfig-ipv6 without --tun-ipv6 will not do IPv6"); ++ + if (options->auth_user_pass_file) + msg (M_USAGE, "--auth-user-pass cannot be used with --mode server (it should be used on the client side only)"); + if (options->ccd_exclusive && !options->client_config_dir) +@@ -1980,6 +2110,8 @@ + */ + if (options->ifconfig_pool_defined || options->ifconfig_pool_persist_filename) + msg (M_USAGE, "--ifconfig-pool/--ifconfig-pool-persist requires --mode server"); ++ if (options->ifconfig_ipv6_pool_defined) ++ msg (M_USAGE, "--ifconfig-ipv6-pool requires --mode server"); + if (options->real_hash_size != defaults.real_hash_size + || options->virtual_hash_size != defaults.virtual_hash_size) + msg (M_USAGE, "--hash-size requires --mode server"); +@@ -2525,6 +2657,8 @@ + o->topology, + o->ifconfig_local, + o->ifconfig_remote_netmask, ++ o->ifconfig_ipv6_local, ++ o->ifconfig_ipv6_remote, + (in_addr_t)0, + (in_addr_t)0, + false, +@@ -3850,6 +3984,30 @@ + goto err; + } + } ++ else if (streq (p[0], "ifconfig-ipv6") && p[1] && p[2] ) ++ { ++ unsigned int netbits; ++ char * ipv6_local; ++ ++ VERIFY_PERMISSION (OPT_P_UP); ++ if ( get_ipv6_addr( p[1], NULL, &netbits, &ipv6_local, msglevel ) && ++ ipv6_addr_safe( p[2] ) ) ++ { ++ if ( netbits < 64 || netbits > 124 ) ++ { ++ msg( msglevel, "ifconfig-ipv6: /netbits must be between 64 and 124, not '/%d'", netbits ); ++ goto err; ++ } ++ options->ifconfig_ipv6_local = ipv6_local; ++ options->ifconfig_ipv6_netbits = netbits; ++ options->ifconfig_ipv6_remote = p[2]; ++ } ++ else ++ { ++ msg (msglevel, "ifconfig-ipv6 parms '%s' and '%s' must be valid addresses", p[1], p[2]); ++ goto err; ++ } ++ } + else if (streq (p[0], "ifconfig-noexec")) + { + VERIFY_PERMISSION (OPT_P_UP); +@@ -4650,6 +4808,26 @@ + } + add_route_to_option_list (options->routes, p[1], p[2], p[3], p[4]); + } ++ else if (streq (p[0], "route-ipv6") && p[1]) ++ { ++ VERIFY_PERMISSION (OPT_P_ROUTE); ++ rol6_check_alloc (options); ++ if (pull_mode) ++ { ++ if (!ipv6_addr_safe_hexplusbits (p[1])) ++ { ++ msg (msglevel, "route-ipv6 parameter network/IP '%s' must be a valid address", p[1]); ++ goto err; ++ } ++ if (p[2] && !ipv6_addr_safe (p[2])) ++ { ++ msg (msglevel, "route-ipv6 parameter gateway '%s' must be a valid address", p[2]); ++ goto err; ++ } ++ /* p[3] is metric, if present */ ++ } ++ add_route_ipv6_to_option_list (options->routes_ipv6, p[1], p[2], p[3]); ++ } + else if (streq (p[0], "max-routes") && p[1]) + { + int max_routes; +@@ -4861,6 +5039,33 @@ + } + } + } ++ else if (streq (p[0], "server-ipv6") && p[1] ) ++ { ++ const int lev = M_WARN; ++ struct in6_addr network; ++ unsigned int netbits = 0; ++ ++ VERIFY_PERMISSION (OPT_P_GENERAL); ++ if ( ! get_ipv6_addr (p[1], &network, &netbits, NULL, lev) ) ++ { ++ msg (msglevel, "error parsing --server-ipv6 parameter"); ++ goto err; ++ } ++ if ( netbits != 64 ) ++ { ++ msg( msglevel, "--server-ipv6 settings: only /64 supported right now (not /%d)", netbits ); ++ goto err; ++ } ++ options->server_ipv6_defined = true; ++ options->server_network_ipv6 = network; ++ options->server_netbits_ipv6 = netbits; ++ ++ if (p[2]) /* no "nopool" options or similar for IPv6 */ ++ { ++ msg (msglevel, "error parsing --server-ipv6: %s is not a recognized flag", p[3]); ++ goto err; ++ } ++ } + else if (streq (p[0], "server-bridge") && p[1] && p[2] && p[3] && p[4]) + { + const int lev = M_WARN; +@@ -4945,6 +5150,28 @@ + VERIFY_PERMISSION (OPT_P_GENERAL); + options->topology = TOP_P2P; + } ++ else if (streq (p[0], "ifconfig-ipv6-pool") && p[1] ) ++ { ++ const int lev = M_WARN; ++ struct in6_addr network; ++ unsigned int netbits = 0; ++ ++ VERIFY_PERMISSION (OPT_P_GENERAL); ++ if ( ! get_ipv6_addr (p[1], &network, &netbits, NULL, lev ) ) ++ { ++ msg (msglevel, "error parsing --ifconfig-ipv6-pool parameters"); ++ goto err; ++ } ++ if ( netbits != 64 ) ++ { ++ msg( msglevel, "--ifconfig-ipv6-pool settings: only /64 supported right now (not /%d)", netbits ); ++ goto err; ++ } ++ ++ options->ifconfig_ipv6_pool_defined = true; ++ options->ifconfig_ipv6_pool_base = network; ++ options->ifconfig_ipv6_pool_netbits = netbits; ++ } + else if (streq (p[0], "hash-size") && p[1] && p[2]) + { + int real, virtual; +@@ -5140,6 +5367,11 @@ + } + option_iroute (options, p[1], netmask, msglevel); + } ++ else if (streq (p[0], "iroute-ipv6") && p[1]) ++ { ++ VERIFY_PERMISSION (OPT_P_INSTANCE); ++ option_iroute_ipv6 (options, p[1], msglevel); ++ } + else if (streq (p[0], "ifconfig-push") && p[1] && p[2]) + { + in_addr_t local, remote_netmask; +@@ -5178,6 +5410,43 @@ + goto err; + } + } ++ else if (streq (p[0], "ifconfig-ipv6-push") && p[1] ) ++ { ++ struct in6_addr local, remote; ++ unsigned int netbits; ++ ++ VERIFY_PERMISSION (OPT_P_INSTANCE); ++ ++ if ( ! get_ipv6_addr( p[1], &local, &netbits, NULL, msglevel ) ) ++ { ++ msg (msglevel, "cannot parse --ifconfig-ipv6-push addresses"); ++ goto err; ++ } ++ ++ if ( p[2] ) ++ { ++ if ( !get_ipv6_addr( p[2], &remote, NULL, NULL, msglevel ) ) ++ { ++ msg( msglevel, "cannot parse --ifconfig-ipv6-push addresses"); ++ goto err; ++ } ++ } ++ else ++ { ++ if ( ! options->ifconfig_ipv6_local || ++ ! get_ipv6_addr( options->ifconfig_ipv6_local, &remote, ++ NULL, NULL, msglevel ) ) ++ { ++ msg( msglevel, "second argument to --ifconfig-ipv6-push missing and no global --ifconfig-ipv6 address set"); ++ goto err; ++ } ++ } ++ ++ options->push_ifconfig_ipv6_defined = true; ++ options->push_ifconfig_ipv6_local = local; ++ options->push_ifconfig_ipv6_netbits = netbits; ++ options->push_ifconfig_ipv6_remote = remote; ++ } + else if (streq (p[0], "disable")) + { + VERIFY_PERMISSION (OPT_P_INSTANCE); +Index: openvpn-2.2.1/options.h +=================================================================== +--- openvpn-2.2.1.orig/options.h 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/options.h 2011-12-13 12:24:54.636739214 +0100 +@@ -205,6 +205,9 @@ + int topology; /* one of the TOP_x values from proto.h */ + const char *ifconfig_local; + const char *ifconfig_remote_netmask; ++ const char *ifconfig_ipv6_local; ++ int ifconfig_ipv6_netbits; ++ const char *ifconfig_ipv6_remote; + bool ifconfig_noexec; + bool ifconfig_nowarn; + #ifdef HAVE_GETTIMEOFDAY +@@ -326,6 +329,7 @@ + bool route_delay_defined; + int max_routes; + struct route_option_list *routes; ++ struct route_ipv6_option_list *routes_ipv6; /* IPv6 */ + bool route_nopull; + bool route_gateway_via_dhcp; + bool allow_pull_fqdn; /* as a client, allow server to push a FQDN for certain parameters */ +@@ -363,6 +367,9 @@ + bool server_defined; + in_addr_t server_network; + in_addr_t server_netmask; ++ bool server_ipv6_defined; /* IPv6 */ ++ struct in6_addr server_network_ipv6; /* IPv6 */ ++ unsigned int server_netbits_ipv6; /* IPv6 */ + + # define SF_NOPOOL (1<<0) + # define SF_TCP_NODELAY_HELPER (1<<1) +@@ -384,6 +391,11 @@ + in_addr_t ifconfig_pool_netmask; + const char *ifconfig_pool_persist_filename; + int ifconfig_pool_persist_refresh_freq; ++ ++ bool ifconfig_ipv6_pool_defined; /* IPv6 */ ++ struct in6_addr ifconfig_ipv6_pool_base; /* IPv6 */ ++ int ifconfig_ipv6_pool_netbits; /* IPv6 */ ++ + int real_hash_size; + int virtual_hash_size; + const char *client_connect_script; +@@ -395,12 +407,17 @@ + int n_bcast_buf; + int tcp_queue_limit; + struct iroute *iroutes; ++ struct iroute_ipv6 *iroutes_ipv6; /* IPv6 */ + bool push_ifconfig_defined; + in_addr_t push_ifconfig_local; + in_addr_t push_ifconfig_remote_netmask; + bool push_ifconfig_constraint_defined; + in_addr_t push_ifconfig_constraint_network; + in_addr_t push_ifconfig_constraint_netmask; ++ bool push_ifconfig_ipv6_defined; /* IPv6 */ ++ struct in6_addr push_ifconfig_ipv6_local; /* IPv6 */ ++ int push_ifconfig_ipv6_netbits; /* IPv6 */ ++ struct in6_addr push_ifconfig_ipv6_remote; /* IPv6 */ + bool enable_c2c; + bool duplicate_cn; + int cf_max; +@@ -723,6 +740,10 @@ + unsigned int *option_types_found, + struct env_set *es); + ++bool get_ipv6_addr( const char * prefix_str, struct in6_addr *network, ++ unsigned int * netbits, char ** printable_ipv6, ++ int msglevel ); ++ + /* + * inline functions + */ +Index: openvpn-2.2.1/pool.c +=================================================================== +--- openvpn-2.2.1.orig/pool.c 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/pool.c 2011-12-13 12:24:54.637739202 +0100 +@@ -132,7 +132,10 @@ + } + + struct ifconfig_pool * +-ifconfig_pool_init (int type, in_addr_t start, in_addr_t end, const bool duplicate_cn) ++ifconfig_pool_init (int type, in_addr_t start, in_addr_t end, ++ const bool duplicate_cn, ++ const bool ipv6_pool, const struct in6_addr ipv6_base, ++ const int ipv6_netbits ) + { + struct gc_arena gc = gc_new (); + struct ifconfig_pool *pool = NULL; +@@ -157,11 +160,31 @@ + ASSERT (0); + } + ++ /* IPv6 pools are always "INDIV" type */ ++ pool->ipv6 = ipv6_pool; ++ ++ if ( pool->ipv6 ) ++ { ++ pool->base_ipv6 = ipv6_base; ++ pool->size_ipv6 = ipv6_netbits>96? ( 1<<(128-ipv6_netbits) ) ++ : IFCONFIG_POOL_MAX; ++ ++ msg( D_IFCONFIG_POOL, "IFCONFIG POOL IPv6: (IPv4) size=%d, size_ipv6=%d, netbits=%d, base_ipv6=%s", ++ pool->size, pool->size_ipv6, ipv6_netbits, ++ print_in6_addr( pool->base_ipv6, 0, &gc )); ++ ++ /* the current code is very simple and assumes that the IPv6 ++ * pool is at least as big as the IPv4 pool, and we don't need ++ * to do separate math etc. for IPv6 ++ */ ++ ASSERT( pool->size < pool->size_ipv6 ); ++ } ++ + ALLOC_ARRAY_CLEAR (pool->list, struct ifconfig_pool_entry, pool->size); + +- msg (D_IFCONFIG_POOL, "IFCONFIG POOL: base=%s size=%d", ++ msg (D_IFCONFIG_POOL, "IFCONFIG POOL: base=%s size=%d, ipv6=%d", + print_in_addr_t (pool->base, 0, &gc), +- pool->size); ++ pool->size, pool->ipv6 ); + + gc_free (&gc); + return pool; +@@ -181,7 +204,7 @@ + } + + ifconfig_pool_handle +-ifconfig_pool_acquire (struct ifconfig_pool *pool, in_addr_t *local, in_addr_t *remote, const char *common_name) ++ifconfig_pool_acquire (struct ifconfig_pool *pool, in_addr_t *local, in_addr_t *remote, struct in6_addr *remote_ipv6, const char *common_name) + { + int i; + +@@ -214,6 +237,12 @@ + default: + ASSERT (0); + } ++ ++ /* IPv6 pools are always INDIV (--linear) */ ++ if ( pool->ipv6 && remote_ipv6 ) ++ { ++ *remote_ipv6 = add_in6_addr( pool->base_ipv6, i ); ++ } + } + return i; + } +@@ -288,6 +317,19 @@ + return ret; + } + ++static struct in6_addr ++ifconfig_pool_handle_to_ipv6_base (const struct ifconfig_pool* pool, ifconfig_pool_handle hand) ++{ ++ struct in6_addr ret = in6addr_any; ++ ++ /* IPv6 pools are always INDIV (--linear) */ ++ if (hand >= 0 && hand < pool->size_ipv6 ) ++ { ++ ret = add_in6_addr( pool->base_ipv6, hand ); ++ } ++ return ret; ++} ++ + static void + ifconfig_pool_set (struct ifconfig_pool* pool, const char *cn, const in_addr_t addr, const bool fixed) + { +@@ -317,9 +359,20 @@ + if (e->common_name) + { + const in_addr_t ip = ifconfig_pool_handle_to_ip_base (pool, i); +- status_printf (out, "%s,%s", +- e->common_name, +- print_in_addr_t (ip, 0, &gc)); ++ if ( pool->ipv6 ) ++ { ++ struct in6_addr ip6 = ifconfig_pool_handle_to_ipv6_base (pool, i); ++ status_printf (out, "%s,%s,%s", ++ e->common_name, ++ print_in_addr_t (ip, 0, &gc), ++ print_in6_addr (ip6, 0, &gc)); ++ } ++ else ++ { ++ status_printf (out, "%s,%s", ++ e->common_name, ++ print_in_addr_t (ip, 0, &gc)); ++ } + } + } + gc_free (&gc); +@@ -409,6 +462,9 @@ + int c = *BSTR(&in); + if (c == '#' || c == ';') + continue; ++ msg( M_INFO, "ifconfig_pool_read(), in='%s', TODO: IPv6", ++ BSTR(&in) ); ++ + if (buf_parse (&in, ',', cn_buf, buf_size) + && buf_parse (&in, ',', ip_buf, buf_size)) + { +@@ -416,6 +472,7 @@ + const in_addr_t addr = getaddr (GETADDR_HOST_ORDER, ip_buf, 0, &succeeded, NULL); + if (succeeded) + { ++ msg( M_INFO, "succeeded -> ifconfig_pool_set()"); + ifconfig_pool_set (pool, cn_buf, addr, persist->fixed); + } + } +@@ -471,7 +528,7 @@ + #else + cn = buf; + #endif +- h = ifconfig_pool_acquire (p, &local, &remote, cn); ++ h = ifconfig_pool_acquire (p, &local, &remote, NULL, cn); + if (h < 0) + break; + msg (M_INFO | M_NOPREFIX, "IFCONFIG_POOL TEST pass 1: l=%s r=%s cn=%s", +@@ -506,7 +563,7 @@ + #else + cn = buf; + #endif +- h = ifconfig_pool_acquire (p, &local, &remote, cn); ++ h = ifconfig_pool_acquire (p, &local, &remote, NULL, cn); + if (h < 0) + break; + msg (M_INFO | M_NOPREFIX, "IFCONFIG_POOL TEST pass 3: l=%s r=%s cn=%s", +Index: openvpn-2.2.1/pool.h +=================================================================== +--- openvpn-2.2.1.orig/pool.h 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/pool.h 2011-12-13 12:24:54.637739202 +0100 +@@ -52,6 +52,9 @@ + int size; + int type; + bool duplicate_cn; ++ bool ipv6; ++ struct in6_addr base_ipv6; ++ unsigned int size_ipv6; + struct ifconfig_pool_entry *list; + }; + +@@ -63,13 +66,13 @@ + + typedef int ifconfig_pool_handle; + +-struct ifconfig_pool *ifconfig_pool_init (int type, in_addr_t start, in_addr_t end, const bool duplicate_cn); ++struct ifconfig_pool *ifconfig_pool_init (int type, in_addr_t start, in_addr_t end, const bool duplicate_cn, const bool ipv6_pool, const struct in6_addr ipv6_base, const int ipv6_netbits ); + + void ifconfig_pool_free (struct ifconfig_pool *pool); + + bool ifconfig_pool_verify_range (const int msglevel, const in_addr_t start, const in_addr_t end); + +-ifconfig_pool_handle ifconfig_pool_acquire (struct ifconfig_pool *pool, in_addr_t *local, in_addr_t *remote, const char *common_name); ++ifconfig_pool_handle ifconfig_pool_acquire (struct ifconfig_pool *pool, in_addr_t *local, in_addr_t *remote, struct in6_addr *remote_ipv6, const char *common_name); + + bool ifconfig_pool_release (struct ifconfig_pool* pool, ifconfig_pool_handle hand, const bool hard); + +Index: openvpn-2.2.1/proto.h +=================================================================== +--- openvpn-2.2.1.orig/proto.h 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/proto.h 2011-12-13 12:24:54.638739190 +0100 +@@ -108,6 +108,21 @@ + }; + + /* ++ * IPv6 header ++ */ ++struct openvpn_ipv6hdr { ++ uint8_t version_prio; ++ uint8_t flow_lbl[3]; ++ uint16_t payload_len; ++ uint8_t nexthdr; ++ uint8_t hop_limit; ++ ++ struct in6_addr saddr; ++ struct in6_addr daddr; ++}; ++ ++ ++/* + * UDP header + */ + struct openvpn_udphdr { +Index: openvpn-2.2.1/push.c +=================================================================== +--- openvpn-2.2.1.orig/push.c 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/push.c 2011-12-13 12:24:54.638739190 +0100 +@@ -189,8 +189,26 @@ + const int safe_cap = BCAP (&buf) - extra; + bool push_sent = false; + ++ msg( M_INFO, "send_push_reply(): safe_cap=%d", safe_cap ); ++ + buf_printf (&buf, "%s", cmd); + ++ if ( c->c2.push_ifconfig_ipv6_defined ) ++ { ++ /* IPv6 is put into buffer first, could be lengthy */ ++ /* TODO: push "/netbits" as well, to allow non-/64 subnet sizes ++ * (needs changes in options.c, options.h, and other places) ++ */ ++ buf_printf( &buf, ",ifconfig-ipv6 %s %s", ++ print_in6_addr( c->c2.push_ifconfig_ipv6_local, 0, &gc), ++ print_in6_addr( c->c2.push_ifconfig_ipv6_remote, 0, &gc) ); ++ if (BLEN (&buf) >= safe_cap) ++ { ++ msg (M_WARN, "--push ifconfig-ipv6 option is too long"); ++ goto fail; ++ } ++ } ++ + while (e) + { + if (e->enable) +Index: openvpn-2.2.1/route.c +=================================================================== +--- openvpn-2.2.1.orig/route.c 2011-12-13 12:24:33.000000000 +0100 ++++ openvpn-2.2.1/route.c 2011-12-13 12:24:54.641739154 +0100 +@@ -35,10 +35,12 @@ + #include "socket.h" + #include "manage.h" + #include "win32.h" ++#include "options.h" + + #include "memdbg.h" + + static void delete_route (const struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es); ++static void delete_route_ipv6 (const struct route_ipv6 *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es); + static void get_bypass_addresses (struct route_bypass *rb, const unsigned int flags); + + #ifdef ENABLE_DEBUG +@@ -68,6 +70,15 @@ + 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) + { +@@ -95,6 +106,15 @@ + 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) + { +@@ -311,6 +331,68 @@ + return false; + } + ++static bool ++init_route_ipv6 (struct route_ipv6 *r6, ++ const struct route_ipv6_option *r6o, ++ const struct route_ipv6_list *rl6 ) ++{ ++ r6->option = r6o; ++ 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 = 0; ++ 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, +@@ -331,6 +413,23 @@ + } + + 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; +@@ -340,6 +439,15 @@ + } + + 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_default_gateway (struct route_list *rl, + struct env_set *es, + const in_addr_t addr) +@@ -469,6 +577,72 @@ + 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) ++ { ++ 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, +@@ -714,10 +888,13 @@ + } + + void +-add_routes (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es) ++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->routes_added) ++ if (rl) ++ redirect_default_route_to_vpn (rl, tt, flags, es); ++ ++ if (rl && !rl->routes_added) + { + int i; + +@@ -742,12 +919,27 @@ + } + rl->routes_added = true; + } ++ ++ 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, const struct tuntap *tt, unsigned int flags, const struct env_set *es) ++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->routes_added) ++ if (rl && rl->routes_added) + { + int i; + for (i = rl->n - 1; i >= 0; --i) +@@ -757,9 +949,28 @@ + } + rl->routes_added = false; + } +- undo_redirect_default_route_to_vpn (rl, tt, flags, es); + +- clear_route_list (rl); ++ if ( rl ) ++ { ++ undo_redirect_default_route_to_vpn (rl, tt, flags, es); ++ 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 +@@ -842,6 +1053,34 @@ + 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); ++} ++ + void + add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es) + { +@@ -1035,6 +1274,176 @@ + gc_free (&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; ++ int byte, bits_to_clear; ++ struct in6_addr network_copy = r6->network; ++ ++ if (!r6->defined) ++ return; ++ ++ gc_init (&gc); ++ argv_init (&argv); ++ ++ /* clear host bit parts of route ++ * (needed if routes are specified improperly, or if we need to ++ * explicitely setup the "connected" network routes on some OSes) ++ */ ++ byte = 15; ++ bits_to_clear = 128 - r6->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--] &= (~0 << bits_to_clear); bits_to_clear = 0; } ++ } ++ ++ network = print_in6_addr( network_copy, 0, &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) ++ */ ++ ++#if defined(TARGET_LINUX) ++#ifdef CONFIG_FEATURE_IPROUTE ++ argv_printf (&argv, "%s -6 route add %s/%d dev %s", ++ iproute_path, ++ network, ++ r6->netbits, ++ device); ++ if (r6->metric_defined) ++ 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 (r6->metric_defined) ++ argv_printf_cat (&argv, " metric %d", r6->metric); ++#endif /*CONFIG_FEATURE_IPROUTE*/ ++ argv_msg (D_ROUTE, &argv); ++ status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route -6/-A inet6 add command failed"); ++ ++#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 ++ ++ 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 -iface %s", ++ ROUTE_PATH, ++ network, ++ r6->netbits, ++ 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 -iface %s", ++ ROUTE_PATH, ++ network, r6->netbits, 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 (const struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es) + { +@@ -1171,6 +1580,142 @@ + #endif + + argv_reset (&argv); ++ gc_free (&gc); ++} ++ ++static 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; ++ ++ if (!r6->defined) ++ return; ++ ++ gc_init (&gc); ++ argv_init (&argv); ++ ++ network = print_in6_addr( r6->network, 0, &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 defined(TARGET_LINUX) ++#ifdef CONFIG_FEATURE_IPROUTE ++ argv_printf (&argv, "%s -6 route del %s/%d dev %s", ++ iproute_path, ++ network, ++ r6->netbits, ++ device); ++#else ++ argv_printf (&argv, "%s -A inet6 del %s/%d dev %s", ++ ROUTE_PATH, ++ network, ++ r6->netbits, ++ device); ++#endif /*CONFIG_FEATURE_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 -iface %s", ++ ROUTE_PATH, ++ network, ++ r6->netbits, ++ 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 -iface %s", ++ ROUTE_PATH, ++ network, r6->netbits, device ); ++ ++ argv_msg (D_ROUTE, &argv); ++ openvpn_execve_check (&argv, es, 0, "ERROR: *BSD 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); + } + +Index: openvpn-2.2.1/route.h +=================================================================== +--- openvpn-2.2.1.orig/route.h 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/route.h 2011-12-13 12:24:54.642739141 +0100 +@@ -92,6 +92,19 @@ + struct route_option routes[EMPTY_ARRAY_SIZE]; + }; + ++struct route_ipv6_option { ++ const char *prefix; /* e.g. "2001:db8:1::/64" */ ++ const char *gateway; /* e.g. "2001:db8:0::2" */ ++ const char *metric; /* e.g. "5" */ ++}; ++ ++struct route_ipv6_option_list { ++ unsigned int flags; ++ int capacity; ++ int n; ++ struct route_ipv6_option routes_ipv6[EMPTY_ARRAY_SIZE]; ++}; ++ + struct route { + bool defined; + const struct route_option *option; +@@ -113,6 +126,31 @@ + struct route routes[EMPTY_ARRAY_SIZE]; + }; + ++struct route_ipv6 { ++ bool defined; ++ const struct route_ipv6_option *option; ++ struct in6_addr network; ++ unsigned int netbits; ++ struct in6_addr gateway; ++ bool metric_defined; ++ int metric; ++}; ++ ++struct route_ipv6_list { ++ bool routes_added; ++ unsigned int flags; ++ int default_metric; ++ bool default_metric_defined; ++ struct in6_addr remote_endpoint_ipv6; ++ bool remote_endpoint_defined; ++ bool did_redirect_default_gateway; /* TODO (?) */ ++ bool did_local; /* TODO (?) */ ++ int capacity; ++ int n; ++ struct route_ipv6 routes_ipv6[EMPTY_ARRAY_SIZE]; ++}; ++ ++ + #if P2MP + /* internal OpenVPN route */ + struct iroute { +@@ -120,15 +158,24 @@ + int netbits; + struct iroute *next; + }; ++ ++struct iroute_ipv6 { ++ struct in6_addr network; ++ unsigned int netbits; ++ struct iroute_ipv6 *next; ++}; + #endif + + struct route_option_list *new_route_option_list (const int max_routes, struct gc_arena *a); ++struct route_ipv6_option_list *new_route_ipv6_option_list (const int max_routes, struct gc_arena *a); + struct route_option_list *clone_route_option_list (const struct route_option_list *src, struct gc_arena *a); + void copy_route_option_list (struct route_option_list *dest, const struct route_option_list *src); + + struct route_list *new_route_list (const int max_routes, struct gc_arena *a); ++struct route_ipv6_list *new_route_ipv6_list (const int max_routes, struct gc_arena *a); + + void add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es); ++void add_route_ipv6 (struct route_ipv6 *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es); + + void add_route_to_option_list (struct route_option_list *l, + const char *network, +@@ -136,6 +183,11 @@ + const char *gateway, + const char *metric); + ++void add_route_ipv6_to_option_list (struct route_ipv6_option_list *l, ++ const char *prefix, ++ const char *gateway, ++ const char *metric); ++ + bool init_route_list (struct route_list *rl, + const struct route_option_list *opt, + const char *remote_endpoint, +@@ -143,21 +195,30 @@ + in_addr_t remote_host, + struct env_set *es); + ++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); ++ + void route_list_add_default_gateway (struct route_list *rl, + struct env_set *es, + const in_addr_t addr); + + void add_routes (struct route_list *rl, ++ struct route_ipv6_list *rl6, + const struct tuntap *tt, + unsigned int flags, + const struct env_set *es); + + void delete_routes (struct route_list *rl, ++ struct route_ipv6_list *rl6, + const struct tuntap *tt, + unsigned int flags, + const struct env_set *es); + + void setenv_routes (struct env_set *es, const struct route_list *rl); ++void setenv_routes_ipv6 (struct env_set *es, const struct route_ipv6_list *rl6); + + bool is_special_addr (const char *addr_str); + +Index: openvpn-2.2.1/socket.c +=================================================================== +--- openvpn-2.2.1.orig/socket.c 2011-12-13 12:23:07.000000000 +0100 ++++ openvpn-2.2.1/socket.c 2011-12-13 12:24:54.645739102 +0100 +@@ -543,6 +543,24 @@ + } + } + ++bool ++ipv6_addr_safe (const char *ipv6_text_addr) ++{ ++ /* verify non-NULL */ ++ if (!ipv6_text_addr) ++ return false; ++ ++ /* verify length is within limits */ ++ if (strlen (ipv6_text_addr) > INET6_ADDRSTRLEN ) ++ return false; ++ ++ /* verify that string will convert to IPv6 address */ ++ { ++ struct in6_addr a6; ++ return inet_pton( AF_INET6, ipv6_text_addr, &a6 ) == 1; ++ } ++} ++ + static bool + dns_addr_safe (const char *addr) + { +@@ -2578,6 +2596,55 @@ + return BSTR (&out); + } + ++/* ++ * Convert an in6_addr in host byte order ++ * to an ascii representation of an IPv6 address ++ */ ++const char * ++print_in6_addr (struct in6_addr a6, unsigned int flags, struct gc_arena *gc) ++{ ++ struct buffer out = alloc_buf_gc (64, gc); ++ char tmp_out_buf[64]; /* inet_ntop wants pointer to buffer */ ++ ++ if ( memcmp(&a6, &in6addr_any, sizeof(a6)) != 0 || ++ !(flags & IA_EMPTY_IF_UNDEF)) ++ { ++ inet_ntop (AF_INET6, &a6, tmp_out_buf, sizeof(tmp_out_buf)-1); ++ buf_printf (&out, "%s", tmp_out_buf ); ++ } ++ return BSTR (&out); ++} ++ ++/* add some offset to an ipv6 address ++ * (add in steps of 32 bits, taking overflow into next round) ++ */ ++#ifndef s6_addr32 ++# ifdef TARGET_SOLARIS ++# define s6_addr32 _S6_un._S6_u32 ++# else ++# define s6_addr32 __u6_addr.__u6_addr32 ++# endif ++#endif ++#ifndef UINT32_MAX ++# define UINT32_MAX (4294967295U) ++#endif ++struct in6_addr add_in6_addr( struct in6_addr base, uint32_t add ) ++{ ++ int i; ++ uint32_t h; ++ ++ for( i=3; i>=0 && add > 0 ; i-- ) ++ { ++ h = ntohl( base.s6_addr32[i] ); ++ base.s6_addr32[i] = htonl( (h+add) & UINT32_MAX ); ++ /* 32-bit overrun? ++ * caveat: can't do "h+add > UINT32_MAX" with 32bit math! ++ */ ++ add = ( h > UINT32_MAX - add )? 1: 0; ++ } ++ return base; ++} ++ + /* set environmental variables for ip/port in *addr */ + void + setenv_sockaddr (struct env_set *es, const char *name_prefix, const struct openvpn_sockaddr *addr, const bool flags) +@@ -3081,6 +3148,58 @@ + + #ifdef WIN32 + ++/* ++ * inet_ntop() and inet_pton() wrap-implementations using ++ * WSAAddressToString() and WSAStringToAddress() functions ++ */ ++const char * ++inet_ntop(int af, const void *src, char *dst, socklen_t size) ++{ ++ struct sockaddr_storage ss; ++ unsigned long s = size; ++ ++ CLEAR(ss); ++ ss.ss_family = af; ++ ++ switch(af) { ++ case AF_INET: ++ ((struct sockaddr_in *)&ss)->sin_addr = *(struct in_addr *)src; ++ break; ++ case AF_INET6: ++ ((struct sockaddr_in6 *)&ss)->sin6_addr = *(struct in6_addr *)src; ++ break; ++ default: ++ ASSERT (0); ++ } ++ // cannot direclty use &size because of strict aliasing rules ++ return (WSAAddressToString((struct sockaddr *)&ss, sizeof(ss), NULL, dst, &s) == 0)? ++ dst : NULL; ++} ++ ++int ++inet_pton(int af, const char *src, void *dst) ++{ ++ struct sockaddr_storage ss; ++ int size = sizeof(ss); ++ char src_copy[INET6_ADDRSTRLEN+1]; ++ ++ CLEAR(ss); ++ // stupid non-const API ++ strncpynt(src_copy, src, INET6_ADDRSTRLEN+1); ++ ++ if (WSAStringToAddress(src_copy, af, NULL, (struct sockaddr *)&ss, &size) == 0) { ++ switch(af) { ++ case AF_INET: ++ *(struct in_addr *)dst = ((struct sockaddr_in *)&ss)->sin_addr; ++ return 1; ++ case AF_INET6: ++ *(struct in6_addr *)dst = ((struct sockaddr_in6 *)&ss)->sin6_addr; ++ return 1; ++ } ++ } ++ return 0; ++} ++ + int + socket_recv_queue (struct link_socket *sock, int maxsize) + { +Index: openvpn-2.2.1/socket.h +=================================================================== +--- openvpn-2.2.1.orig/socket.h 2011-12-13 12:23:07.000000000 +0100 ++++ openvpn-2.2.1/socket.h 2011-12-13 12:24:54.646739089 +0100 +@@ -368,6 +368,8 @@ + #define IA_EMPTY_IF_UNDEF (1<<0) + #define IA_NET_ORDER (1<<1) + const char *print_in_addr_t (in_addr_t addr, unsigned int flags, struct gc_arena *gc); ++const char *print_in6_addr (struct in6_addr addr6, unsigned int flags, struct gc_arena *gc); ++struct in6_addr add_in6_addr( struct in6_addr base, uint32_t add ); + + #define SA_IP_PORT (1<<0) + #define SA_SET_IF_NONZERO (1<<1) +@@ -427,6 +429,7 @@ + bool ip_addr_dotted_quad_safe (const char *dotted_quad); + bool ip_or_dns_addr_safe (const char *addr, const bool allow_fqdn); + bool mac_addr_safe (const char *mac_addr); ++bool ipv6_addr_safe (const char *ipv6_text_addr); + + socket_descriptor_t create_socket_tcp (void); + +Index: openvpn-2.2.1/tun.c +=================================================================== +--- openvpn-2.2.1.orig/tun.c 2011-12-13 12:23:07.394079932 +0100 ++++ openvpn-2.2.1/tun.c 2011-12-13 12:41:30.078294479 +0100 +@@ -56,13 +56,14 @@ + const in_addr_t ip, + const in_addr_t netmask, + const unsigned int flags); ++static void netsh_command (const struct argv *a, int n); + + static const char *netsh_get_id (const char *dev_node, struct gc_arena *gc); + + #endif + + #ifdef TARGET_SOLARIS +-static void solaris_error_close (struct tuntap *tt, const struct env_set *es, const char *actual); ++static void solaris_error_close (struct tuntap *tt, const struct env_set *es, const char *actual, bool unplumb_inet6); + #include <stropts.h> + #endif + +@@ -129,30 +130,6 @@ + return dev; + } + +-/* +- * Called by the open_tun function of OSes to check if we +- * explicitly support IPv6. +- * +- * In this context, explicit means that the OS expects us to +- * do something special to the tun socket in order to support +- * IPv6, i.e. it is not transparent. +- * +- * ipv6_explicitly_supported should be set to false if we don't +- * have any explicit IPv6 code in the tun device handler. +- * +- * If ipv6_explicitly_supported is true, then we have explicit +- * OS-specific tun dev code for handling IPv6. If so, tt->ipv6 +- * is set according to the --tun-ipv6 command line option. +- */ +-static void +-ipv6_support (bool ipv6, bool ipv6_explicitly_supported, struct tuntap* tt) +-{ +- tt->ipv6 = false; +- if (ipv6_explicitly_supported) +- tt->ipv6 = ipv6; +- else if (ipv6) +- msg (M_WARN, "NOTE: explicit support for IPv6 tun devices is not provided for this OS"); +-} + + /* --ifconfig-nowarn disables some options sanity checking */ + static const char ifconfig_warn_how_to_silence[] = "(silence this warning with --ifconfig-nowarn)"; +@@ -423,6 +400,8 @@ + int topology, /* one of the TOP_x values */ + const char *ifconfig_local_parm, /* --ifconfig parm 1 */ + const char *ifconfig_remote_netmask_parm, /* --ifconfig parm 2 */ ++ const char *ifconfig_ipv6_local_parm, /* --ifconfig parm 1 IPv6 */ ++ const char *ifconfig_ipv6_remote_parm, /* --ifconfig parm 2 IPv6 */ + in_addr_t local_public, + in_addr_t remote_public, + const bool strict_warn, +@@ -537,6 +516,40 @@ + + tt->did_ifconfig_setup = true; + } ++ ++ if (ifconfig_ipv6_local_parm && ifconfig_ipv6_remote_parm) ++ { ++ const char *ifconfig_ipv6_local = NULL; ++ const char *ifconfig_ipv6_remote = NULL; ++ ++ /* ++ * Convert arguments to binary IPv6 addresses. ++ */ ++ ++ if ( inet_pton( AF_INET6, ifconfig_ipv6_local_parm, &tt->local_ipv6 ) != 1 || ++ inet_pton( AF_INET6, ifconfig_ipv6_remote_parm, &tt->remote_ipv6 ) != 1 ) ++ { ++ msg( M_FATAL, "init_tun: problem converting IPv6 ifconfig addresses %s and %s to binary", ifconfig_ipv6_local_parm, ifconfig_ipv6_remote_parm ); ++ } ++ tt->netbits_ipv6 = 64; ++ ++ /* ++ * Set ifconfig parameters ++ */ ++ ifconfig_ipv6_local = print_in6_addr (tt->local_ipv6, 0, &gc); ++ ifconfig_ipv6_remote = print_in6_addr (tt->remote_ipv6, 0, &gc); ++ ++ /* ++ * Set environmental variables with ifconfig parameters. ++ */ ++ if (es) ++ { ++ setenv_str (es, "ifconfig_ipv6_local", ifconfig_ipv6_local); ++ setenv_str (es, "ifconfig_ipv6_remote", ifconfig_ipv6_remote); ++ } ++ tt->did_ifconfig_ipv6_setup = true; ++ } ++ + gc_free (&gc); + return tt; + } +@@ -559,6 +572,28 @@ + #endif + } + ++#if defined(TARGET_WIN32) || \ ++ defined(TARGET_DARWIN) || defined(TARGET_NETBSD) || defined(TARGET_OPENBSD) ++ ++/* some of the platforms will auto-add a "network route" pointing ++ * to the interface on "ifconfig tunX 2001:db8::1/64", others need ++ * an extra call to "route add..." ++ * -> helper function to simplify code below ++ */ ++void add_route_connected_v6_net(struct tuntap * tt, ++ const struct env_set *es) ++{ ++ struct route_ipv6 r6; ++ ++ r6.defined = true; ++ r6.network = tt->local_ipv6; ++ r6.netbits = tt->netbits_ipv6; ++ r6.gateway = tt->local_ipv6; ++ add_route_ipv6 (&r6, tt, 0, es); ++} ++#endif ++ ++ + /* execute the ifconfig command through the shell */ + void + do_ifconfig (struct tuntap *tt, +@@ -574,10 +609,16 @@ + const char *ifconfig_local = NULL; + const char *ifconfig_remote_netmask = NULL; + const char *ifconfig_broadcast = NULL; ++ const char *ifconfig_ipv6_local = NULL; ++ const char *ifconfig_ipv6_remote = NULL; ++ bool do_ipv6 = false; + struct argv argv; + + argv_init (&argv); + ++ msg( M_INFO, "do_ifconfig, tt->ipv6=%d, tt->did_ifconfig_ipv6_setup=%d", ++ tt->ipv6, tt->did_ifconfig_ipv6_setup ); ++ + /* + * We only handle TUN/TAP devices here, not --dev null devices. + */ +@@ -589,6 +630,13 @@ + ifconfig_local = print_in_addr_t (tt->local, 0, &gc); + ifconfig_remote_netmask = print_in_addr_t (tt->remote_netmask, 0, &gc); + ++ if ( tt->ipv6 && tt->did_ifconfig_ipv6_setup ) ++ { ++ ifconfig_ipv6_local = print_in6_addr (tt->local_ipv6, 0, &gc); ++ ifconfig_ipv6_remote = print_in6_addr (tt->remote_ipv6, 0, &gc); ++ do_ipv6 = true; ++ } ++ + /* + * If TAP-style device, generate broadcast address. + */ +@@ -647,7 +695,19 @@ + argv_msg (M_INFO, &argv); + openvpn_execve_check (&argv, es, S_FATAL, "Linux ip addr add failed"); + } +- tt->did_ifconfig = true; ++ if ( do_ipv6 ) ++ { ++ argv_printf( &argv, ++ "%s -6 addr add %s/%d dev %s", ++ iproute_path, ++ ifconfig_ipv6_local, ++ tt->netbits_ipv6, ++ actual ++ ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, S_FATAL, "Linux ip -6 addr add failed"); ++ } ++ tt->did_ifconfig = true; + #else + if (tun) + argv_printf (&argv, +@@ -670,6 +730,18 @@ + ); + argv_msg (M_INFO, &argv); + openvpn_execve_check (&argv, es, S_FATAL, "Linux ifconfig failed"); ++ if ( do_ipv6 ) ++ { ++ argv_printf (&argv, ++ "%s %s inet6 add %s/%d", ++ IFCONFIG_PATH, ++ actual, ++ ifconfig_ipv6_local, ++ tt->netbits_ipv6 ++ ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, S_FATAL, "Linux ifconfig inet6 failed"); ++ } + tt->did_ifconfig = true; + + #endif /*CONFIG_FEATURE_IPROUTE*/ +@@ -693,7 +765,7 @@ + + argv_msg (M_INFO, &argv); + if (!openvpn_execve_check (&argv, es, 0, "Solaris ifconfig phase-1 failed")) +- solaris_error_close (tt, es, actual); ++ solaris_error_close (tt, es, actual, false); + + argv_printf (&argv, + "%s %s netmask 255.255.255.255", +@@ -725,7 +797,53 @@ + + argv_msg (M_INFO, &argv); + if (!openvpn_execve_check (&argv, es, 0, "Solaris ifconfig phase-2 failed")) +- solaris_error_close (tt, es, actual); ++ solaris_error_close (tt, es, actual, false); ++ ++ if ( do_ipv6 ) ++ { ++ argv_printf (&argv, "%s %s inet6 unplumb", ++ IFCONFIG_PATH, actual ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, 0, NULL); ++ ++ if ( tt->type == DEV_TYPE_TUN ) ++ { ++ argv_printf (&argv, ++ "%s %s inet6 plumb %s/%d %s up", ++ IFCONFIG_PATH, ++ actual, ++ ifconfig_ipv6_local, ++ tt->netbits_ipv6, ++ ifconfig_ipv6_remote ++ ); ++ } ++ else /* tap mode */ ++ { ++ /* base IPv6 tap interface needs to be brought up first ++ */ ++ argv_printf (&argv, "%s %s inet6 plumb up", ++ IFCONFIG_PATH, actual ); ++ argv_msg (M_INFO, &argv); ++ if (!openvpn_execve_check (&argv, es, 0, "Solaris ifconfig IPv6 (prepare) failed")) ++ solaris_error_close (tt, es, actual, true); ++ ++ /* we might need to do "ifconfig %s inet6 auto-dhcp drop" ++ * after the system has noticed the interface and fired up ++ * the DHCPv6 client - but this takes quite a while, and the ++ * server will ignore the DHCPv6 packets anyway. So we don't. ++ */ ++ ++ /* static IPv6 addresses need to go to a subinterface (tap0:1) ++ */ ++ argv_printf (&argv, ++ "%s %s inet6 addif %s/%d up", ++ IFCONFIG_PATH, actual, ++ ifconfig_ipv6_local, tt->netbits_ipv6 ); ++ } ++ argv_msg (M_INFO, &argv); ++ if (!openvpn_execve_check (&argv, es, 0, "Solaris ifconfig IPv6 failed")) ++ solaris_error_close (tt, es, actual, true); ++ } + + if (!tun && tt->topology == TOP_SUBNET) + { +@@ -787,10 +905,42 @@ + ); + argv_msg (M_INFO, &argv); + openvpn_execve_check (&argv, es, S_FATAL, "OpenBSD ifconfig failed"); ++ if ( do_ipv6 ) ++ { ++ argv_printf (&argv, ++ "%s %s inet6 %s/%d", ++ IFCONFIG_PATH, ++ actual, ++ ifconfig_ipv6_local, ++ tt->netbits_ipv6 ++ ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, S_FATAL, "OpenBSD ifconfig inet6 failed"); ++ ++ /* and, hooray, we explicitely need to add a route... */ ++ add_route_connected_v6_net(tt, es); ++ } + tt->did_ifconfig = true; + + #elif defined(TARGET_NETBSD) + ++/* whether or not NetBSD can do IPv6 can be seen by the availability of ++ * the TUNSIFHEAD ioctl() - see next TARGET_NETBSD block for more details ++ */ ++#ifdef TUNSIFHEAD ++# define NETBSD_MULTI_AF ++#endif ++ ++ /* as on OpenBSD and Darwin, destroy and re-create tun<x> interface ++ */ ++ argv_printf (&argv, "%s %s destroy", IFCONFIG_PATH, actual ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, 0, "NetBSD ifconfig destroy failed"); ++ ++ argv_printf (&argv, "%s %s create", IFCONFIG_PATH, actual ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, S_FATAL, "NetBSD ifconfig create failed"); ++ + if (tun) + argv_printf (&argv, + "%s %s %s %s mtu %d netmask 255.255.255.255 up", +@@ -817,6 +967,27 @@ + ); + argv_msg (M_INFO, &argv); + openvpn_execve_check (&argv, es, S_FATAL, "NetBSD ifconfig failed"); ++ ++ if ( do_ipv6 ) ++ { ++#ifdef NETBSD_MULTI_AF ++ argv_printf (&argv, ++ "%s %s inet6 %s/%d", ++ IFCONFIG_PATH, ++ actual, ++ ifconfig_ipv6_local, ++ tt->netbits_ipv6 ++ ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, S_FATAL, "NetBSD ifconfig inet6 failed"); ++ ++ /* and, hooray, we explicitely need to add a route... */ ++ add_route_connected_v6_net(tt, es); ++#else ++ msg( M_INFO, "no IPv6 support for tun interfaces on NetBSD before 4.0 (if your system is newer, recompile openvpn)" ); ++ tt->ipv6 = false; ++#endif ++ } + tt->did_ifconfig = true; + + #elif defined(TARGET_DARWIN) +@@ -882,6 +1053,22 @@ + add_route (&r, tt, 0, es); + } + ++ if ( do_ipv6 ) ++ { ++ argv_printf (&argv, ++ "%s %s inet6 %s/%d", ++ IFCONFIG_PATH, ++ actual, ++ ifconfig_ipv6_local, ++ tt->netbits_ipv6 ++ ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, S_FATAL, "MacOS X ifconfig inet6 failed"); ++ ++ /* and, hooray, we explicitely need to add a route... */ ++ add_route_connected_v6_net(tt, es); ++ } ++ + #elif defined(TARGET_FREEBSD)||defined(TARGET_DRAGONFLY) + + /* example: ifconfig tun2 10.2.0.2 10.2.0.1 mtu 1450 netmask 255.255.255.255 up */ +@@ -920,6 +1107,19 @@ + add_route (&r, tt, 0, es); + } + ++ if ( do_ipv6 ) ++ { ++ argv_printf (&argv, ++ "%s %s inet6 %s/%d", ++ IFCONFIG_PATH, ++ actual, ++ ifconfig_ipv6_local, ++ tt->netbits_ipv6 ++ ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, S_FATAL, "FreeBSD ifconfig inet6 failed"); ++ } ++ + #elif defined (WIN32) + { + /* +@@ -959,6 +1159,34 @@ + tt->did_ifconfig = true; + } + ++ /* IPv6 always uses "netsh" interface */ ++ if ( do_ipv6 ) ++ { ++ char * saved_actual; ++ ++ if (!strcmp (actual, "NULL")) ++ msg (M_FATAL, "Error: When using --tun-ipv6, if you have more than one TAP-Win32 adapter, you must also specify --dev-node"); ++ ++ /* example: netsh interface ipv6 add address MyTap 2001:608:8003::d */ ++ argv_printf (&argv, ++ "%s%sc interface ipv6 add address %s %s", ++ get_win_sys_path(), ++ NETSH_PATH_SUFFIX, ++ actual, ++ ifconfig_ipv6_local ); ++ ++ netsh_command (&argv, 4); ++ ++ /* explicit route needed */ ++ /* on windows, OpenVPN does ifconfig first, open_tun later, so ++ * tt->actual_name might not yet be initialized, but routing code ++ * needs to know interface name - point to "actual", restore later ++ */ ++ saved_actual = tt->actual_name; ++ tt->actual_name = (char*) actual; ++ add_route_connected_v6_net(tt, es); ++ tt->actual_name = saved_actual; ++ } + #else + msg (M_FATAL, "Sorry, but I don't know how to do 'ifconfig' commands on this operating system. You should ifconfig your TUN/TAP device manually or use an --up script."); + #endif +@@ -991,14 +1219,16 @@ + #ifndef WIN32 + static void + open_tun_generic (const char *dev, const char *dev_type, const char *dev_node, +- bool ipv6, bool ipv6_explicitly_supported, bool dynamic, ++ bool ipv6_explicitly_supported, bool dynamic, + struct tuntap *tt) + { + char tunname[256]; + char dynamic_name[256]; + bool dynamic_opened = false; + +- ipv6_support (ipv6, ipv6_explicitly_supported, tt); ++ ++ if ( tt->ipv6 && ! ipv6_explicitly_supported ) ++ msg (M_WARN, "NOTE: explicit support for IPv6 tun devices is not provided for this OS"); + + if (tt->type == DEV_TYPE_NULL) + { +@@ -1094,16 +1324,16 @@ + #if !PEDANTIC + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { + struct ifreq ifr; + +- /* +- * Set tt->ipv6 to true if +- * (a) we have the capability of supporting --tun-ipv6, and +- * (b) --tun-ipv6 was specified. ++ /* warn if a very old linux version is used & --tun-ipv6 set + */ +- ipv6_support (ipv6, LINUX_IPV6, tt); ++#if LINUX_IPV6 == 0 ++ if ( tt->ipv6 ) ++ msg (M_WARN, "NOTE: explicit support for IPv6 tun devices is not provided for this OS"); ++#endif + + /* + * We handle --dev null specially, we do not open /dev/null for this. +@@ -1212,7 +1442,7 @@ + #else + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { + ASSERT (0); + } +@@ -1222,9 +1452,9 @@ + #else + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { +- open_tun_generic (dev, dev_type, dev_node, ipv6, false, true, tt); ++ open_tun_generic (dev, dev_type, dev_node, false, true, tt); + } + + #endif /* HAVE_LINUX_IF_TUN_H */ +@@ -1244,7 +1474,7 @@ + #endif + + void +-tuncfg (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, int persist_mode, const char *username, const char *groupname, const struct tuntap_options *options) ++tuncfg (const char *dev, const char *dev_type, const char *dev_node, int persist_mode, const char *username, const char *groupname, const struct tuntap_options *options) + { + struct tuntap *tt; + +@@ -1252,7 +1482,7 @@ + clear_tuntap (tt); + tt->type = dev_type_enum (dev, dev_type); + tt->options = *options; +- open_tun (dev, dev_type, dev_node, ipv6, tt); ++ open_tun (dev, dev_type, dev_node, tt); + if (ioctl (tt->fd, TUNSETPERSIST, persist_mode) < 0) + msg (M_ERR, "Cannot ioctl TUNSETPERSIST(%d) %s", persist_mode, dev); + if (username != NULL) +@@ -1395,7 +1625,7 @@ + #endif + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { + int if_fd, ip_muxid, arp_muxid, arp_fd, ppa = -1; + struct lifreq ifr; +@@ -1406,7 +1636,10 @@ + bool is_tun; + struct strioctl strioc_if, strioc_ppa; + +- ipv6_support (ipv6, true, tt); ++ /* improved generic TUN/TAP driver from ++ * http://www.whiteboard.ne.jp/~admin2/tuntap/ ++ * has IPv6 support ++ */ + memset(&ifr, 0x0, sizeof(ifr)); + + if (tt->type == DEV_TYPE_NULL) +@@ -1561,6 +1794,18 @@ + { + if (tt) + { ++ /* IPv6 interfaces need to be 'manually' de-configured */ ++ if ( tt->ipv6 && tt->did_ifconfig_ipv6_setup ) ++ { ++ struct argv argv; ++ argv_init (&argv); ++ argv_printf( &argv, "%s %s inet6 unplumb", ++ IFCONFIG_PATH, tt->actual_name ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, NULL, 0, "Solaris ifconfig inet6 unplumb failed"); ++ argv_reset (&argv); ++ } ++ + if (tt->ip_fd >= 0) + { + struct lifreq ifr; +@@ -1613,11 +1858,20 @@ + } + + static void +-solaris_error_close (struct tuntap *tt, const struct env_set *es, const char *actual) ++solaris_error_close (struct tuntap *tt, const struct env_set *es, ++ const char *actual, bool unplumb_inet6 ) + { + struct argv argv; + argv_init (&argv); + ++ if (unplumb_inet6) ++ { ++ argv_printf( &argv, "%s %s inet6 unplumb", ++ IFCONFIG_PATH, actual ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, es, 0, "Solaris ifconfig inet6 unplumb failed"); ++ } ++ + argv_printf (&argv, + "%s %s unplumb", + IFCONFIG_PATH, +@@ -1674,9 +1928,9 @@ + */ + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { +- open_tun_generic (dev, dev_type, dev_node, ipv6, true, true, tt); ++ open_tun_generic (dev, dev_type, dev_node, true, true, tt); + + /* Enable multicast on the interface */ + if (tt->fd >= 0) +@@ -1699,12 +1953,31 @@ + } + } + ++/* the current way OpenVPN handles tun devices on OpenBSD leads to ++ * lingering tunX interfaces after close -> for a full cleanup, they ++ * need to be explicitely destroyed ++ */ ++ + void + close_tun (struct tuntap* tt) + { + if (tt) + { ++ struct gc_arena gc = gc_new (); ++ struct argv argv; ++ ++ /* setup command, close tun dev (clears tt->actual_name!), run command ++ */ ++ ++ argv_init (&argv); ++ argv_printf (&argv, "%s %s destroy", ++ IFCONFIG_PATH, tt->actual_name); ++ + close_tun_generic (tt); ++ ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, NULL, 0, "OpenBSD 'destroy tun interface' failed (non-critical)"); ++ + free (tt); + } + } +@@ -1767,33 +2040,51 @@ + #elif defined(TARGET_NETBSD) + + /* +- * NetBSD does not support IPv6 on tun out of the box, +- * but there exists a patch. When this patch is applied, +- * only two things are left to openvpn: +- * 1. Activate multicasting (this has already been done +- * before by the kernel, but we make sure that nobody +- * has deactivated multicasting inbetween. +- * 2. Deactivate "link layer mode" (otherwise NetBSD +- * prepends the address family to the packet, and we +- * would run into the same trouble as with OpenBSD. ++ * NetBSD before 4.0 does not support IPv6 on tun out of the box, ++ * but there exists a patch (sys/net/if_tun.c, 1.79->1.80, see PR 32944). ++ * ++ * NetBSD 4.0 and up do, but we need to put the tun interface into ++ * "multi_af" mode, which will prepend the address family to all packets ++ * (same as OpenBSD and FreeBSD). If this is not enabled, the kernel ++ * silently drops all IPv6 packets on output and gets confused on input. ++ * ++ * On earlier versions, multi_af is not available at all, so we have ++ * two different NetBSD code variants here :-( ++ * + */ + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { +- open_tun_generic (dev, dev_type, dev_node, ipv6, true, true, tt); ++#ifdef NETBSD_MULTI_AF ++ open_tun_generic (dev, dev_type, dev_node, true, true, tt); ++#else ++ open_tun_generic (dev, dev_type, dev_node, false, true, tt); ++#endif ++ + if (tt->fd >= 0) + { + int i = IFF_POINTOPOINT|IFF_MULTICAST; + ioctl (tt->fd, TUNSIFMODE, &i); /* multicast on */ + i = 0; + ioctl (tt->fd, TUNSLMODE, &i); /* link layer mode off */ ++ ++#ifdef NETBSD_MULTI_AF ++ i = 1; ++ if (ioctl (tt->fd, TUNSIFHEAD, &i) < 0) /* multi-af mode on */ ++ { ++ msg (M_WARN | M_ERRNO, "ioctl(TUNSIFHEAD): %s", strerror(errno)); ++ } ++#endif + } + } + + void + close_tun (struct tuntap *tt) + { ++ /* TODO: we really should cleanup non-persistant tunX with ++ * "ifconfig tunX destroy" here... ++ */ + if (tt) + { + close_tun_generic (tt); +@@ -1801,6 +2092,65 @@ + } + } + ++#ifdef NETBSD_MULTI_AF ++ ++static inline int ++netbsd_modify_read_write_return (int len) ++{ ++ if (len > 0) ++ return len > sizeof (u_int32_t) ? len - sizeof (u_int32_t) : 0; ++ else ++ return len; ++} ++ ++int ++write_tun (struct tuntap* tt, uint8_t *buf, int len) ++{ ++ if (tt->type == DEV_TYPE_TUN) ++ { ++ u_int32_t type; ++ struct iovec iv[2]; ++ struct openvpn_iphdr *iph; ++ ++ iph = (struct openvpn_iphdr *) buf; ++ ++ if (tt->ipv6 && OPENVPN_IPH_GET_VER(iph->version_len) == 6) ++ type = htonl (AF_INET6); ++ else ++ type = htonl (AF_INET); ++ ++ iv[0].iov_base = (char *)&type; ++ iv[0].iov_len = sizeof (type); ++ iv[1].iov_base = buf; ++ iv[1].iov_len = len; ++ ++ return netbsd_modify_read_write_return (writev (tt->fd, iv, 2)); ++ } ++ else ++ return write (tt->fd, buf, len); ++} ++ ++int ++read_tun (struct tuntap* tt, uint8_t *buf, int len) ++{ ++ if (tt->type == DEV_TYPE_TUN) ++ { ++ u_int32_t type; ++ struct iovec iv[2]; ++ ++ iv[0].iov_base = (char *)&type; ++ iv[0].iov_len = sizeof (type); ++ iv[1].iov_base = buf; ++ iv[1].iov_len = len; ++ ++ return netbsd_modify_read_write_return (readv (tt->fd, iv, 2)); ++ } ++ else ++ return read (tt->fd, buf, len); ++} ++ ++#else /* not NETBSD_MULTI_AF -> older code, IPv4 only */ ++ + int + write_tun (struct tuntap* tt, uint8_t *buf, int len) + { +@@ -1812,6 +2162,7 @@ + { + return read (tt->fd, buf, len); + } ++#endif /* NETBSD_MULTI_AF */ + + #elif defined(TARGET_FREEBSD) + +@@ -1825,9 +2176,9 @@ + } + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { +- open_tun_generic (dev, dev_type, dev_node, ipv6, true, true, tt); ++ open_tun_generic (dev, dev_type, dev_node, true, true, tt); + + if (tt->fd >= 0 && tt->type == DEV_TYPE_TUN) + { +@@ -1913,9 +2264,9 @@ + } + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { +- open_tun_generic (dev, dev_type, dev_node, ipv6, true, true, tt); ++ open_tun_generic (dev, dev_type, dev_node, true, true, tt); + + if (tt->fd >= 0) + { +@@ -1984,6 +2335,61 @@ + return read (tt->fd, buf, len); + } + ++#elif defined(TARGET_DARWIN) ++ ++/* Darwin (MacOS X) is mostly "just use the generic stuff", but there ++ * is always one caveat...: ++ * ++ * If IPv6 is configured, and the tun device is closed, the IPv6 address ++ * configured to the tun interface changes to a lingering /128 route ++ * pointing to lo0. Need to unconfigure... (observed on 10.5) ++ */ ++ ++void ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) ++{ ++ open_tun_generic (dev, dev_type, dev_node, false, true, tt); ++} ++ ++void ++close_tun (struct tuntap* tt) ++{ ++ if (tt) ++ { ++ struct gc_arena gc = gc_new (); ++ struct argv argv; ++ argv_init (&argv); ++ ++ if ( tt->ipv6 && tt->did_ifconfig_ipv6_setup ) ++ { ++ const char * ifconfig_ipv6_local = ++ print_in6_addr (tt->local_ipv6, 0, &gc); ++ ++ argv_printf (&argv, "%s delete -inet6 %s", ++ ROUTE_PATH, ifconfig_ipv6_local ); ++ argv_msg (M_INFO, &argv); ++ openvpn_execve_check (&argv, NULL, 0, "MacOS X 'remove inet6 route' failed (non-critical)"); ++ } ++ ++ close_tun_generic (tt); ++ free (tt); ++ argv_reset (&argv); ++ gc_free (&gc); ++ } ++} ++ ++int ++write_tun (struct tuntap* tt, uint8_t *buf, int len) ++{ ++ return write (tt->fd, buf, len); ++} ++ ++int ++read_tun (struct tuntap* tt, uint8_t *buf, int len) ++{ ++ return read (tt->fd, buf, len); ++} ++ + #elif defined(WIN32) + + int +@@ -3969,7 +4375,7 @@ + } + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { + struct gc_arena gc = gc_new (); + char device_path[256]; +@@ -3980,7 +4386,7 @@ + + /*netcmd_semaphore_lock ();*/ + +- ipv6_support (ipv6, false, tt); ++ msg( M_INFO, "open_tun, tt->ipv6=%d", tt->ipv6 ); + + if (tt->type == DEV_TYPE_NULL) + { +@@ -4102,6 +4508,16 @@ + msg (M_FATAL, "ERROR: This version of " PACKAGE_NAME " requires a TAP-Win32 driver that is at least version %d.%d -- If you recently upgraded your " PACKAGE_NAME " distribution, a reboot is probably required at this point to get Windows to see the new driver.", + TAP_WIN32_MIN_MAJOR, + TAP_WIN32_MIN_MINOR); ++ ++ /* usage of numeric constants is ugly, but this is really tied to ++ * *this* version of the driver ++ */ ++ if ( tt->ipv6 && tt->type == DEV_TYPE_TUN && ++ info[0] == 9 && info[1] < 8) ++ { ++ msg( M_INFO, "WARNING: Tap-Win32 driver version %d.%d does not support IPv6 in TUN mode. IPv6 will be disabled. Upgrade to Tap-Win32 9.8 (2.2-beta3 release or later) or use TAP mode to get IPv6", (int) info[0], (int) info[1] ); ++ tt->ipv6 = false; ++ } + } + + /* get driver MTU */ +@@ -4426,6 +4842,12 @@ + + if (tt) + { ++ if ( tt->ipv6 && tt->did_ifconfig_ipv6_setup ) ++ { ++ /* netsh interface ipv6 delete address \"%s\" %s */ ++ const char * ifconfig_ipv6_local = print_in6_addr (tt->local_ipv6, 0, &gc); ++ msg( M_WARN, "TODO: remove IPv6 address %s", ifconfig_ipv6_local ); ++ } + #if 1 + if (tt->ipapi_context_defined) + { +@@ -4529,9 +4951,9 @@ + #else /* generic */ + + void +-open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6, struct tuntap *tt) ++open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt) + { +- open_tun_generic (dev, dev_type, dev_node, ipv6, false, true, tt); ++ open_tun_generic (dev, dev_type, dev_node, false, true, tt); + } + + void +Index: openvpn-2.2.1/tun.h +=================================================================== +--- openvpn-2.2.1.orig/tun.h 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/tun.h 2011-12-13 12:24:54.653739003 +0100 +@@ -130,6 +130,7 @@ + int topology; /* one of the TOP_x values */ + + bool did_ifconfig_setup; ++ bool did_ifconfig_ipv6_setup; + bool did_ifconfig; + + bool ipv6; +@@ -146,6 +147,10 @@ + in_addr_t remote_netmask; + in_addr_t broadcast; + ++ struct in6_addr local_ipv6; ++ struct in6_addr remote_ipv6; ++ int netbits_ipv6; ++ + #ifdef WIN32 + HANDLE hand; + struct overlapped_io reads; +@@ -197,7 +202,7 @@ + void clear_tuntap (struct tuntap *tuntap); + + void open_tun (const char *dev, const char *dev_type, const char *dev_node, +- bool ipv6, struct tuntap *tt); ++ struct tuntap *tt); + + void close_tun (struct tuntap *tt); + +@@ -206,7 +211,7 @@ + int read_tun (struct tuntap* tt, uint8_t *buf, int len); + + void tuncfg (const char *dev, const char *dev_type, const char *dev_node, +- bool ipv6, int persist_mode, const char *username, ++ int persist_mode, const char *username, + const char *groupname, const struct tuntap_options *options); + + const char *guess_tuntap_dev (const char *dev, +@@ -219,6 +224,8 @@ + int topology, /* one of the TOP_x values */ + const char *ifconfig_local_parm, /* --ifconfig parm 1 */ + const char *ifconfig_remote_netmask_parm, /* --ifconfig parm 2 */ ++ const char *ifconfig_ipv6_local_parm, /* --ifconfig parm 1 / IPv6 */ ++ const char *ifconfig_ipv6_remote_parm, /* --ifconfig parm 2 / IPv6 */ + in_addr_t local_public, + in_addr_t remote_public, + const bool strict_warn, +Index: openvpn-2.2.1/win32.c +=================================================================== +--- openvpn-2.2.1.orig/win32.c 2011-06-24 08:13:39.000000000 +0200 ++++ openvpn-2.2.1/win32.c 2011-12-13 12:24:54.654738990 +0100 +@@ -874,16 +874,21 @@ + static char * + env_block (const struct env_set *es) + { ++ char * force_path = "PATH=C:\\Windows\\System32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem"; ++ + if (es) + { + struct env_item *e; + char *ret; + char *p; + size_t nchars = 1; ++ bool path_seen = false; + + for (e = es->list; e != NULL; e = e->next) + nchars += strlen (e->string) + 1; + ++ nchars += strlen(force_path)+1; ++ + ret = (char *) malloc (nchars); + check_malloc_return (ret); + +@@ -895,7 +900,18 @@ + strcpy (p, e->string); + p += strlen (e->string) + 1; + } ++ if ( strncmp(e->string, "PATH=", 5 ) == 0 ) ++ path_seen = true; ++ } ++ ++ /* make sure PATH is set */ ++ if ( !path_seen ) ++ { ++ msg( M_INFO, "env_block: add %s", force_path ); ++ strcpy( p, force_path ); ++ p += strlen(force_path) + 1; + } ++ + *p = '\0'; + return ret; + } +Index: openvpn-2.2.1/win32.h +=================================================================== +--- openvpn-2.2.1.orig/win32.h 2011-12-13 12:23:07.000000000 +0100 ++++ openvpn-2.2.1/win32.h 2011-12-13 12:24:54.654738990 +0100 +@@ -272,6 +272,8 @@ + + /* call self in a subprocess */ + void fork_to_self (const char *cmdline); ++const char *inet_ntop(int af, const void *src, char *dst, socklen_t size); ++int inet_pton(int af, const char *src, void *st); + + /* Find temporary directory */ + const char *win_get_tempdir(); |