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Re: [Openvpn-devel] openvpn ipv6 pool env variables
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From: Samuel T. <sam...@en...> - 2013-03-31 23:30:07
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Hello,
To make it short: yes, the ipv6 pool environment variables are useful,
for user-defined scripts to be run at connection for instance to
propagate routes, do accounting, etc. The patch below adds them.
Thanks,
Samuel
Add IPv6 pool environment variables
Add ifconfig_ipv6_pool_local_ip, ifconfig_ipv6_pool_remote_ip and
ifconfig_ipv6_pool_netbits environment variables, similar to
ifconfig_pool_local_ip, ifconfig_pool_remote_ip, and
ifconfig_pool_netmask.
Signed-off-by: Samuel Thibault <sam...@en...>
diff --git a/doc/openvpn.8 b/doc/openvpn.8
index d590714..70a8f35 100644
--- a/doc/openvpn.8
+++ b/doc/openvpn.8
@@ -5755,6 +5755,60 @@ and
scripts.
.\"*********************************************************
.TP
+.B ifconfig_ipv6_pool_local_ip
+The local
+virtual IPv6 address for the TUN/TAP tunnel taken from an
+.B \-\-ifconfig-ipv6-push
+directive if specified, or otherwise from
+the ifconfig pool (controlled by the
+.B \-\-ifconfig-ipv6-pool
+config file directive).
+Only set for
+.B \-\-dev tun
+tunnels.
+This option is set on the server prior to execution
+of the
+.B \-\-client-connect
+and
+.B \-\-client-disconnect
+scripts.
+.\"*********************************************************
+.TP
+.B ifconfig_ipv6_pool_netbits
+The
+size of the virtual IPv6 netmask for the TUN/TAP tunnel taken from an
+.B \-\-ifconfig-ipv6-push
+directive if specified, or otherwise from
+the ifconfig pool (controlled by the
+.B \-\-ifconfig-ipv6-pool
+config file directive).
+Only set for
+.B \-\-dev tap
+tunnels.
+This option is set on the server prior to execution
+of the
+.B \-\-client-connect
+and
+.B \-\-client-disconnect
+scripts.
+.\"*********************************************************
+.TP
+.B ifconfig_ipv6_pool_remote_ip
+The remote
+virtual IPv6 address for the TUN/TAP tunnel taken from an
+.B \-\-ifconfig-ipv6-push
+directive if specified, or otherwise from
+the ifconfig pool (controlled by the
+.B \-\-ifconfig-ipv6-pool
+config file directive).
+This option is set on the server prior to execution
+of the
+.B \-\-client-connect
+and
+.B \-\-client-disconnect
+scripts.
+.\"*********************************************************
+.TP
.B link_mtu
The maximum packet size (not including the IP header)
of tunnel data in UDP tunnel transport mode.
diff --git a/src/openvpn/manage.c b/src/openvpn/manage.c
index 0a4542a..72686f3 100644
--- a/src/openvpn/manage.c
+++ b/src/openvpn/manage.c
@@ -2283,6 +2283,8 @@ env_filter_match (const char *env_str, const int env_filter_level)
"dev=",
"ifconfig_pool_remote_ip=",
"ifconfig_pool_netmask=",
+ "ifconfig_ipv6_pool_remote_ip=",
+ "ifconfig_ipv6_pool_netbits=",
"time_duration=",
"bytes_sent=",
"bytes_received="
diff --git a/src/openvpn/multi.c b/src/openvpn/multi.c
index ab3f10c..d38cc8e 100644
--- a/src/openvpn/multi.c
+++ b/src/openvpn/multi.c
@@ -1426,10 +1426,35 @@ multi_set_virtual_addr_env (struct multi_context *m, struct multi_instance *mi)
}
}
- /* 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?
- */
+ setenv_del (mi->context.c2.es, "ifconfig_ipv6_pool_local_ip");
+ setenv_del (mi->context.c2.es, "ifconfig_ipv6_pool_remote_ip");
+ setenv_del (mi->context.c2.es, "ifconfig_ipv6_pool_netbits");
+
+ if (mi->context.c2.push_ifconfig_ipv6_defined)
+ {
+ const int tunnel_type = TUNNEL_TYPE (mi->context.c1.tuntap);
+ const int tunnel_topology = TUNNEL_TOPOLOGY (mi->context.c1.tuntap);
+
+ setenv_in6_addr_t (mi->context.c2.es,
+ "ifconfig_ipv6_pool_remote_ip",
+ &mi->context.c2.push_ifconfig_ipv6_local,
+ SA_SET_IF_NONZERO);
+
+ if (tunnel_type == DEV_TYPE_TAP || (tunnel_type == DEV_TYPE_TUN && tunnel_topology == TOP_SUBNET))
+ {
+ setenv_int (mi->context.c2.es,
+ "ifconfig_ipv6_pool_netbits",
+ mi->context.c2.push_ifconfig_ipv6_netbits);
+ }
+ else if (tunnel_type == DEV_TYPE_TUN)
+ {
+ setenv_in6_addr_t (mi->context.c2.es,
+ "ifconfig_ipv6_pool_local_ip",
+ &mi->context.c2.push_ifconfig_ipv6_remote,
+ SA_SET_IF_NONZERO);
+ }
+ }
+
}
/*
diff --git a/src/openvpn/socket.c b/src/openvpn/socket.c
index 8eb112b..8eb27f6 100644
--- a/src/openvpn/socket.c
+++ b/src/openvpn/socket.c
@@ -2381,7 +2381,10 @@ setenv_sockaddr (struct env_set *es, const char *name_prefix, const struct openv
}
break;
case AF_INET6:
- openvpn_snprintf (name_buf, sizeof (name_buf), "%s_ip6", name_prefix);
+ if (flags & SA_IP_PORT)
+ openvpn_snprintf (name_buf, sizeof (name_buf), "%s_ip6", name_prefix);
+ else
+ openvpn_snprintf (name_buf, sizeof (name_buf), "%s", name_prefix);
getnameinfo(&addr->addr.sa, sizeof (struct sockaddr_in6),
buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
setenv_str (es, name_buf, buf);
@@ -2409,6 +2412,19 @@ setenv_in_addr_t (struct env_set *es, const char *name_prefix, in_addr_t addr, c
}
void
+setenv_in6_addr_t (struct env_set *es, const char *name_prefix, struct in6_addr *addr, const bool flags)
+{
+ if ( memcmp(addr, &in6addr_any, sizeof(*addr)) != 0 || !(flags & SA_SET_IF_NONZERO))
+ {
+ struct openvpn_sockaddr si;
+ CLEAR (si);
+ si.addr.in6.sin6_family = AF_INET6;
+ si.addr.in6.sin6_addr = *addr;
+ setenv_sockaddr (es, name_prefix, &si, flags);
+ }
+}
+
+void
setenv_link_socket_actual (struct env_set *es,
const char *name_prefix,
const struct link_socket_actual *act,
diff --git a/src/openvpn/socket.h b/src/openvpn/socket.h
index 4e7e7f8..788e6ee 100644
--- a/src/openvpn/socket.h
+++ b/src/openvpn/socket.h
@@ -383,6 +383,11 @@ void setenv_in_addr_t (struct env_set *es,
in_addr_t addr,
const unsigned int flags);
+void setenv_in6_addr_t (struct env_set *es,
+ const char *name_prefix,
+ struct in6_addr *addr,
+ const bool flags);
+
void setenv_link_socket_actual (struct env_set *es,
const char *name_prefix,
const struct link_socket_actual *act,
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