diff options
| -rw-r--r-- | openvpn/README.IPv6 | 138 | ||||
| -rw-r--r-- | openvpn/src/openvpn/event.c | 3 | ||||
| -rw-r--r-- | openvpn/src/openvpn/init.c | 8 | ||||
| -rw-r--r-- | openvpn/src/openvpn/misc.c | 30 | ||||
| -rw-r--r-- | openvpn/src/openvpn/platform.c | 28 | ||||
| -rw-r--r-- | openvpn/src/openvpn/status.c | 2 |
6 files changed, 69 insertions, 140 deletions
diff --git a/openvpn/README.IPv6 b/openvpn/README.IPv6 index d504f4ff..56c97abb 100644 --- a/openvpn/README.IPv6 +++ b/openvpn/README.IPv6 @@ -1,97 +1,65 @@ +Since 2.3.0, OpenVPN officially supports IPv6, and all widely used +patches floating around for older versions have been integrated. + IPv6 payload support -------------------- -Latest IPv6 payload support code and documentation can be found from here: +This is for "IPv6 inside OpenVPN", with server-pushed IPv6 configuration +on the client, and support for IPv6 configuration on the tun/tap interface +from within the openvpn config. + +The code in 2.3.0 supersedes the IPv6 payload patches from Gert Doering, +formerly located at http://www.greenie.net/ipv6/openvpn.html + - http://www.greenie.net/ipv6/openvpn.html +The following options have been added to handle IPv6 configuration, +analogous to their IPv4 counterparts (--server <-> --server-ipv6, etc.) -For TODO list, see TODO.IPv6. + - server-ipv6 + - ifconfig-ipv6 + - ifconfig-ipv6-pool + - ifconfig-ipv6-push + - route-ipv6 + - iroute-ipv6 -Gert Doering, 31.12.2009 +see "man openvpn" for details how they are used. IPv6 transport support ---------------------- -[ Last updated: 25-Mar-2011. ] - -OpenVPN-2.1 over UDP6/TCP6 README for ipv6-0.4.x patch releases: -( --udp6 and --tcp6-{client,server} ) - -* Availability - Source code under GPLv2 from http://github.com/jjo/openvpn-ipv6 - - Distro ready repos/packages: - o Debian sid official repo, by Alberto Gonzalez Iniesta, - starting from openvpn_2.1~rc20-2 - o Gentoo official portage tree, by Marcel Pennewiss: - - https://bugs.gentoo.org/show_bug.cgi?id=287896 - o Ubuntu package, by Bernhard Schmidt: - - https://launchpad.net/~berni/+archive/ipv6/+packages - o Freetz.org, milestone freetz-1.2 - - http://trac.freetz.org/milestone/freetz-1.2 - -* Status: - o OK: - - upd6,tcp6: GNU/Linux, win32, openbsd-4.7, freebsd-8.1 - - udp4->upd6,tcp4->tcp6 (ipv4/6 mapped): GNU/Linux - (gives a warning on local!=remote proto matching) - o NOT: - - win32: tcp4->tcp6 (ipv4/6 mapped) fails w/connection refused - o NOT tested: - - mgmt console - -* Build setup: - ./configure --enable-ipv6 (by default) - -* Usage: - For IPv6 just specify "-p upd6" an proper IPv6 hostnames, adapting the example - from man page ... - - On may: - openvpn --proto udp6 --remote <june_IPv6_addr> --dev tun1 \ - --ifconfig 10.4.0.1 10.4.0.2 --verb 5 --secret key - - On june: - openvpn --proto udp6 --remote <may_IPv6_addr> --dev tun1 \ - --ifconfig 10.4.0.2 10.4.0.1 --verb 5 --secret key - - Same for --proto tcp6-client, tcp6-server. - -* Main code changes summary: - - socket.h: New struct openvpn_sockaddr type that holds sockaddrs and pktinfo, - (here I omitted #ifdef USE_PF_xxxx, see socket.h ) - - struct openvpn_sockaddr { - union { - struct sockaddr sa; - struct sockaddr_in in; - struct sockaddr_in6 in6; - } addr; - }; - - struct link_socket_addr - { - struct openvpn_sockaddr local; - struct openvpn_sockaddr remote; - struct openvpn_sockaddr actual; - }; - - PRO: allows simple type overloading: local.addr.sa, local.addr.in, local.addr.in6 ... etc - (also local.pi.in and local.pi.in6) - - - several function prototypes moved from sockaddr_in to openvpn_sockaddr - - several new sockaddr functions needed to "generalize" AF_xxxx operations: - addr_copy(), addr_zero(), ...etc - proto_is_udp(), proto_is_dgram(), proto_is_net() - -* For TODO list, see TODO.IPv6 - --- -JuanJo Ciarlante jjo () google () com ............................ -: : -. Linux IP Aliasing author . -. Modular algo (AES et all) support for FreeSWAN/OpenSWAN author . -. OpenVPN over IPv6 support . -:...... plus other scattered free software bits in the wild ...: +This is to enable OpenVPN peers or client/servers to talk to each other +over an IPv6 network ("OpenVPN over IPv6"). + +The code in 2.3.0 supersedes the IPv6 transport patches from JuanJo Ciarlante, +formerly located at http://github.com/jjo/openvpn-ipv6 + + +Use the following options to select IPv6 transport: + + --proto udp6 + --proto tcp6-client + --proto tcp6-server + --proto tcp6 --client / --proto tcp6 --server + +On systems that permit IPv4 connections on IPv6 sockets (Linux by +default, FreeBSD and NetBSD if you turn off the "v6only" sysctl by +running "sysctl -w net.inet6.ip6.v6only=0"), an OpenVPN server can +handle IPv4 connections on the IPv6 socket as well, making it a true +dual-stacked server. + +On other systems, as of 2.3.0, you need to run separate server instances +for IPv4 and IPv6. + +The client side code is not really "dual-stacked" yet, as it does not +automatically try both address families when connecting to a dual-stacked +server. For now, you can achieve this with <connection> stanzas in your +openvpn config: + + <connection> + remote my.dual.stack.server 1194 udp6 + </connection> + <connection> + remote my.dual.stack.server 1194 udp + </connection> diff --git a/openvpn/src/openvpn/event.c b/openvpn/src/openvpn/event.c index 2a13e1cf..34a3c451 100644 --- a/openvpn/src/openvpn/event.c +++ b/openvpn/src/openvpn/event.c @@ -34,6 +34,7 @@ #include "error.h" #include "integer.h" #include "event.h" +#include "fdmisc.h" #include "memdbg.h" @@ -582,6 +583,8 @@ ep_init (int *maxevents, unsigned int flags) if (fd < 0) return NULL; + set_cloexec (fd); + ALLOC_OBJ_CLEAR (eps, struct ep_set); /* set dispatch functions */ diff --git a/openvpn/src/openvpn/init.c b/openvpn/src/openvpn/init.c index b3125282..28121235 100644 --- a/openvpn/src/openvpn/init.c +++ b/openvpn/src/openvpn/init.c @@ -3288,6 +3288,10 @@ init_instance (struct context *c, const struct env_set *env, const unsigned int /* init garbage collection level */ gc_init (&c->c2.gc); + /* inherit environmental variables */ + if (env) + do_inherit_env (c, env); + /* signals caught here will abort */ c->sig->signal_received = 0; c->sig->signal_text = NULL; @@ -3339,10 +3343,6 @@ init_instance (struct context *c, const struct env_set *env, const unsigned int if (c->mode == CM_P2P || c->mode == CM_TOP) do_option_warnings (c); - /* inherit environmental variables */ - if (env) - do_inherit_env (c, env); - #ifdef ENABLE_PLUGIN /* initialize plugins */ if (c->mode == CM_P2P || c->mode == CM_TOP) diff --git a/openvpn/src/openvpn/misc.c b/openvpn/src/openvpn/misc.c index 1e9a7fc0..fa327f8c 100644 --- a/openvpn/src/openvpn/misc.c +++ b/openvpn/src/openvpn/misc.c @@ -707,13 +707,6 @@ env_set_remove_from_environment (const struct env_set *es) static struct env_item *global_env = NULL; /* GLOBAL */ -void -manage_env (char *str) -{ - remove_env_item (str, true, &global_env); - add_env_item (str, false, &global_env, NULL); -} - #endif /* add/modify/delete environmental strings */ @@ -789,27 +782,18 @@ setenv_str_ex (struct env_set *es, if (value) val_tmp = string_mod_const (value, value_include, value_exclude, value_replace, &gc); - if (es) + ASSERT (es); + + if (val_tmp) { - if (val_tmp) - { - const char *str = construct_name_value (name_tmp, val_tmp, &gc); - env_set_add (es, str); + const char *str = construct_name_value (name_tmp, val_tmp, &gc); + env_set_add (es, str); #if DEBUG_VERBOSE_SETENV - msg (M_INFO, "SETENV_ES '%s'", str); + msg (M_INFO, "SETENV_ES '%s'", str); #endif - } - else - env_set_del (es, name_tmp); } else - { - char *str = construct_name_value (name_tmp, val_tmp, &gc); - if (platform_putenv(str)) - { - msg (M_WARN | M_ERRNO, "putenv('%s') failed", str); - } - } + env_set_del (es, name_tmp); gc_free (&gc); } diff --git a/openvpn/src/openvpn/platform.c b/openvpn/src/openvpn/platform.c index e79de7a7..16d4daca 100644 --- a/openvpn/src/openvpn/platform.c +++ b/openvpn/src/openvpn/platform.c @@ -275,34 +275,6 @@ platform_unlink (const char *filename) #endif } -int platform_putenv(char *string) -{ - int status; -#if defined(WIN32) - struct gc_arena gc = gc_new (); - char *s = string_alloc(string, &gc); - char *value = strchr(s, '='); - if (value!=NULL) - { - *value = '\0'; - value++; - if (*value == '\0') - value = NULL; - } - - status = SetEnvironmentVariableW (wide_string (s, &gc), - wide_string (value, &gc)) ? 1: 0; - gc_free (&gc); -#elif defined(HAVE_PUTENV) - void manage_env (char *str); /* TODO: Resolve properly */ - status = putenv (string); - if (!status) - manage_env (string); -#endif - - return status; -} - FILE * platform_fopen (const char *path, const char *mode) { diff --git a/openvpn/src/openvpn/status.c b/openvpn/src/openvpn/status.c index 5f9ab9ee..b7ff4843 100644 --- a/openvpn/src/openvpn/status.c +++ b/openvpn/src/openvpn/status.c @@ -33,6 +33,7 @@ #include "status.h" #include "perf.h" #include "misc.h" +#include "fdmisc.h" #include "memdbg.h" @@ -98,6 +99,7 @@ status_open (const char *filename, if (so->fd >= 0) { so->filename = string_alloc (filename, NULL); + set_cloexec (so->fd); /* allocate read buffer */ if (so->flags & STATUS_OUTPUT_READ) |