These DHCP options will
be added on the client to the (Windows) tun adapter and will be
available to other applications.
This allows the server to push out a TFTP address to use for
applications like Cisco's IP Phone.
WPAD stands for Windows Proxy Auto Detection and it allows
Internet Explorer to automatically pick up a proxy address
via the URL http://<WPAD-IP>/wpad.dat
---
doc/openvpn.8 | 8 ++++++++
src/openvpn/options.c | 14 ++++++++++++++
src/openvpn/tun.c | 20 ++++++++++++++++++++
src/openvpn/tun.h | 9 ++++++++-
4 files changed, 50 insertions(+), 1 deletions(-)
diff --git a/doc/openvpn.8 b/doc/openvpn.8
index e213f5a..87ac26c 100644
--- a/doc/openvpn.8
+++ b/doc/openvpn.8
@@ -5481,6 +5481,14 @@ is pushed via
to a non-windows client, the option will be saved in the client's
environment before the up script is called, under
the name "foreign_option_{n}".
+
+.B TFTP addr --
+Set TFTP server address (Trivial File Transer Protocol).
+This option sets both the RFC2132 DHCP option (66) and the Cisco option (150).
+
+.B WPAD url --
+Set the WPAD url (Windows Proxy Auto Detection) for proxy autodetection.
+The URL should be of the format "http://example.org/wpad.dat";.
.\"*********************************************************
.TP
.B \-\-tap\-sleep n
diff --git a/src/openvpn/options.c b/src/openvpn/options.c
index de4fa38..fb0cd71 100644
--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -674,11 +674,13 @@ static const char usage_message[] =
" DNS addr : Set domain name server address(es)\n"
" NTP : Set NTP server address(es)\n"
" NBDD : Set NBDD server address(es)\n"
+ " TFTP : Set TFTP server address(es)\n"
" WINS addr : Set WINS server address(es)\n"
" NBT type : Set NetBIOS over TCP/IP Node type\n"
" 1: B, 2: P, 4: M, 8: H\n"
" NBS id : Set NetBIOS scope ID\n"
" DISABLE-NBT : Disable Netbios-over-TCP/IP.\n"
+ " WPAD url : Set WebProxy AutoDiscovery url\n"
"--dhcp-renew : Ask Windows to renew the TAP adapter lease on
startup.\n"
"--dhcp-pre-release : Ask Windows to release the previous TAP adapter lease
on\n"
" startup.\n"
@@ -1098,11 +1100,13 @@ show_tuntap_options (const struct tuntap_options *o)
SHOW_STR (netbios_scope);
SHOW_INT (netbios_node_type);
SHOW_BOOL (disable_nbt);
+ SHOW_STR (wpad_url);
show_dhcp_option_addrs ("DNS", o->dns, o->dns_len);
show_dhcp_option_addrs ("WINS", o->wins, o->wins_len);
show_dhcp_option_addrs ("NTP", o->ntp, o->ntp_len);
show_dhcp_option_addrs ("NBDD", o->nbdd, o->nbdd_len);
+ show_dhcp_option_addrs ("TFTP", o->tftp, o->tftp_len);
}
#endif
@@ -5282,6 +5286,8 @@ add_option (struct options *options,
{
if (ip_or_dns_addr_safe (p[1], options->allow_pull_fqdn) ||
is_special_addr (p[1])) /* FQDN -- may be DNS name */
{
+ struct tuntap_options *o = &options->tuntap_options;
+
options->route_default_gateway = p[1];
}
else
@@ -6079,6 +6085,14 @@ add_option (struct options *options,
{
o->disable_nbt = 1;
}
+ else if (streq (p[1], "TFTP") && p[2])
+ {
+ dhcp_option_address_parse ("TFTP", p[2], o->tftp, &o->tftp_len,
msglevel);
+ }
+ else if (streq (p[1], "WPAD") && p[2])
+ {
+ o->wpad_url = p[2];
+ }
else
{
msg (msglevel, "--dhcp-option: unknown option type '%s' or missing or
unknown parameter", p[1]);
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index 24a61ec..21e0138 100644
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -4967,6 +4967,11 @@ static bool
build_dhcp_options_string (struct buffer *buf, const struct tuntap_options *o)
{
bool error = false;
+ const char *tftp_str = NULL;
+ int i;
+
+ struct gc_arena gc = gc_new ();
+
if (o->domain)
write_dhcp_str (buf, 15, o->domain, &error);
@@ -4997,6 +5002,21 @@ build_dhcp_options_string (struct buffer *buf, const
struct tuntap_options *o)
buf_write_u8 (buf, 4); /* length of the vendor specified field */
buf_write_u32 (buf, 0x002);
}
+
+ /* Set both the RFC2132 and Cisco DHCP options for a TFTP server */
+ if (o->tftp_len > 0)
+ {
+ tftp_str = print_in_addr_t (o->tftp[0], 0, &gc);
+ write_dhcp_str (buf, 66, tftp_str, &error);
+ }
+ write_dhcp_u32_array (buf, 150, (uint32_t*)o->tftp, o->tftp_len, &error);
+
+ /* IE6 seems to requires an extra character at the end of the URL */
+ if (o->wpad_url)
+ write_dhcp_str (buf, 252, o->wpad_url, &error);
+
+ gc_free (&gc);
+
return !error;
}
diff --git a/src/openvpn/tun.h b/src/openvpn/tun.h
index 65bacac..93be13e 100644
--- a/src/openvpn/tun.h
+++ b/src/openvpn/tun.h
@@ -78,7 +78,6 @@ struct tuntap_options {
#define N_DHCP_ADDR 4 /* Max # of addresses allowed for
DNS, WINS, etc. */
-
/* DNS (6) */
in_addr_t dns[N_DHCP_ADDR];
int dns_len;
@@ -98,6 +97,14 @@ struct tuntap_options {
/* DISABLE_NBT (43, Vendor option 001) */
bool disable_nbt;
+ /* TFTP (66&150), RFC2132 states that it does not have to be an in_addr_t
+ but option 150 (Cisco) *does* */
+ in_addr_t tftp[N_DHCP_ADDR];
+ int tftp_len;
+
+ /* WPAD automatic proxy URL (252) */
+ const char *wpad_url;
+
bool dhcp_renew;
bool dhcp_pre_release;
bool dhcp_release;
--
1.7.1
