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Mode Config refactoring

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This commit is contained in:
Andreas Steffen
2007-01-25 19:40:34 +00:00
parent 1c266d7d69
commit f8200bf0f7
2 changed files with 128 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/pluto/constants.h
-2
View File
@@ -664,7 +664,6 @@ extern enum_names attr_msg_type_names;
#define SUPPORTED_ATTRIBUTES 14
#define INTERNAL_IP6_SUBNET 15
#define MODECFG_ROOF 16
extern enum_names modecfg_attr_names;
@@ -681,7 +680,6 @@ extern enum_names modecfg_attr_names;
#define XAUTH_ANSWER 16529
#define XAUTH_BASE XAUTH_TYPE
#define XAUTH_ROOF 16530
extern enum_names xauth_attr_names;
src/pluto/modecfg.c
+128 -52
View File
@@ -2,7 +2,7 @@
* Copyright (C) 2001-2002 Colubris Networks
* Copyright (C) 2003 Sean Mathews - Nu Tech Software Solutions, inc.
* Copyright (C) 2003-2004 Xelerance Corporation
* Copyright (C) 2006 Andreas Steffen - Hochschule fuer Technik Rapperswil
* Copyright (C) 2006-2007 Andreas Steffen - Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -43,12 +43,17 @@
#define MAX_XAUTH_TRIES 3
#define SUPPORTED_ATTR_SET ( LELEM(INTERNAL_IP4_ADDRESS) \
| LELEM(INTERNAL_IP4_NETMASK) \
| LELEM(INTERNAL_IP4_DNS) \
| LELEM(INTERNAL_IP4_NBNS) \
#define SUPPORTED_ATTR_SET ( LELEM(INTERNAL_IP4_ADDRESS) \
| LELEM(INTERNAL_IP4_NETMASK) \
| LELEM(INTERNAL_IP4_DNS) \
| LELEM(INTERNAL_IP4_NBNS) \
| LELEM(APPLICATION_VERSION) \
)
#define SUPPORTED_UNITY_ATTR_SET ( LELEM(UNITY_BANNER - UNITY_BASE) )
#define UNITY_BANNER_STR "Welcome to strongSwan - the Linux VPN Solution!\n"
/*
* Addresses assigned (usually via ModeCfg) to the Initiator
*/
@@ -57,12 +62,16 @@ typedef struct internal_addr internal_addr_t;
struct internal_addr
{
lset_t attr_set;
lset_t xauth_attr_set;
lset_t unity_attr_set;
/* ModeCfg variables */
ip_address ipaddr;
ip_address dns[2];
ip_address wins[2];
char *unity_banner;
/* XAUTH variables */
u_int16_t xauth_type;
xauth_t xauth_secret;
@@ -76,9 +85,12 @@ static void
init_internal_addr(internal_addr_t *ia)
{
ia->attr_set = LEMPTY;
ia->xauth_attr_set = LEMPTY;
ia->xauth_secret.user_name = empty_chunk;
ia->xauth_secret.user_password = empty_chunk;
ia->xauth_status = FALSE;
ia->unity_attr_set = LEMPTY;
ia->unity_banner = NULL;
anyaddr(AF_INET, &ia->ipaddr);
anyaddr(AF_INET, &ia->dns[0]);
@@ -93,8 +105,6 @@ init_internal_addr(internal_addr_t *ia)
static void
get_internal_addr(struct connection *c, internal_addr_t *ia)
{
init_internal_addr(ia);
if (isanyaddr(&c->spd.that.host_srcip))
{
/* not defined in connection - fetch it from LDAP */
@@ -115,10 +125,10 @@ get_internal_addr(struct connection *c, internal_addr_t *ia)
c->spd.that.client.maskbits = 32;
c->spd.that.has_client = TRUE;
ia->attr_set |= LELEM(INTERNAL_IP4_ADDRESS) | LELEM(INTERNAL_IP4_NETMASK);
ia->attr_set = LELEM(INTERNAL_IP4_ADDRESS)
| LELEM(INTERNAL_IP4_NETMASK);
}
if (!isanyaddr(&ia->dns[0])) /* We got DNS addresses, send them */
ia->attr_set |= LELEM(INTERNAL_IP4_DNS);
@@ -210,6 +220,8 @@ modecfg_build_msg(struct state *st, pb_stream *rbody
int attr_type;
int dns_idx, wins_idx;
bool dont_advance;
bool is_xauth_attr_set = ia->xauth_attr_set != LEMPTY;
bool is_unity_attr_set = ia->unity_attr_set != LEMPTY;
lset_t attr_set = ia->attr_set;
attrh.isama_np = ISAKMP_NEXT_NONE;
@@ -223,9 +235,26 @@ modecfg_build_msg(struct state *st, pb_stream *rbody
dns_idx = 0;
wins_idx = 0;
while (attr_set != 0)
while (attr_set != LEMPTY || is_xauth_attr_set || is_unity_attr_set)
{
if (attr_set == LEMPTY)
{
if (is_xauth_attr_set)
{
attr_set = ia->xauth_attr_set;
attr_type = XAUTH_BASE;
is_xauth_attr_set = FALSE;
}
else
{
attr_set = ia->unity_attr_set;
attr_type = UNITY_BASE;
is_unity_attr_set = FALSE;
}
}
dont_advance = FALSE;
if (attr_set & 1)
{
const u_char *byte_ptr;
@@ -343,6 +372,14 @@ modecfg_build_msg(struct state *st, pb_stream *rbody
break;
case XAUTH_STATUS:
break;
case UNITY_BANNER:
if (ia->unity_banner != NULL)
{
out_raw(ia->unity_banner
, strlen(ia->unity_banner)
, &attrval, "UNITY_BANNER");
}
break;
default:
plog("attempt to send unsupported mode cfg attribute %s."
, enum_show(&modecfg_attr_names, attr_type));
@@ -353,14 +390,6 @@ modecfg_build_msg(struct state *st, pb_stream *rbody
if (!dont_advance)
{
attr_type++;
if (attr_type == MODECFG_ROOF)
{
attr_type = XAUTH_BASE;
}
else if (attr_type == XAUTH_ROOF)
{
attr_type = UNITY_BASE;
}
attr_set >>= 1;
}
}
@@ -458,7 +487,7 @@ modecfg_parse_attributes(pb_stream *attrs, internal_addr_t *ia)
{
initaddr((char *)(strattr.cur), 4, AF_INET, &ia->ipaddr);
}
/* fall through to set attribute flags */
/* fall through to set attribute flag */
case INTERNAL_IP4_NETMASK:
case INTERNAL_IP4_DNS:
case INTERNAL_IP4_SUBNET:
@@ -466,6 +495,38 @@ modecfg_parse_attributes(pb_stream *attrs, internal_addr_t *ia)
ia->attr_set |= LELEM(attr_type);
break;
case APPLICATION_VERSION:
if (attr_len > 0)
{
DBG(DBG_PARSING,
DBG_log(" '%.*s'", attr_len, strattr.cur)
)
}
ia->attr_set |= LELEM(attr_type);
break;
case XAUTH_TYPE:
ia->xauth_type = attr.isaat_lv;
ia->xauth_attr_set |= LELEM(attr_type - XAUTH_BASE);
break;
case XAUTH_USER_NAME:
setchunk(ia->xauth_secret.user_name, strattr.cur, attr_len);
ia->xauth_attr_set |= LELEM(attr_type - XAUTH_BASE);
break;
case XAUTH_USER_PASSWORD:
setchunk(ia->xauth_secret.user_password, strattr.cur, attr_len);
ia->xauth_attr_set |= LELEM(attr_type - XAUTH_BASE);
break;
case XAUTH_STATUS:
ia->xauth_status = attr.isaat_lv;
ia->xauth_attr_set |= LELEM(attr_type - XAUTH_BASE);
break;
case XAUTH_PASSCODE:
case XAUTH_MESSAGE:
case XAUTH_CHALLENGE:
case XAUTH_DOMAIN:
case XAUTH_NEXT_PIN:
case XAUTH_ANSWER:
ia->xauth_attr_set |= LELEM(attr_type - XAUTH_BASE);
break;
case UNITY_DDNS_HOSTNAME:
if (attr_len > 0)
{
@@ -473,22 +534,18 @@ modecfg_parse_attributes(pb_stream *attrs, internal_addr_t *ia)
DBG_log(" '%.*s'", attr_len, strattr.cur)
)
}
break;
case XAUTH_TYPE:
ia->xauth_type = attr.isaat_lv;
ia->attr_set |= LELEM(attr_type - XAUTH_BASE + MODECFG_ROOF);
break;
case XAUTH_USER_NAME:
setchunk(ia->xauth_secret.user_name, strattr.cur, attr_len);
ia->attr_set |= LELEM(attr_type - XAUTH_BASE + MODECFG_ROOF);
break;
case XAUTH_USER_PASSWORD:
setchunk(ia->xauth_secret.user_password, strattr.cur, attr_len);
ia->attr_set |= LELEM(attr_type - XAUTH_BASE + MODECFG_ROOF);
break;
case XAUTH_STATUS:
ia->xauth_status = attr.isaat_lv;
ia->attr_set |= LELEM(attr_type - XAUTH_BASE + MODECFG_ROOF);
/* fall through to set attribute flag */
case UNITY_BANNER:
case UNITY_SAVE_PASSWD:
case UNITY_DEF_DOMAIN:
case UNITY_SPLITDNS_NAME:
case UNITY_SPLIT_INCLUDE:
case UNITY_NATT_PORT:
case UNITY_LOCAL_LAN:
case UNITY_PFS:
case UNITY_FW_TYPE:
case UNITY_BACKUP_SERVERS:
ia->unity_attr_set |= LELEM(attr_type - UNITY_BASE);
break;
default:
plog("unsupported ModeCfg attribute %s received."
@@ -560,6 +617,7 @@ modecfg_send_request(struct state *st)
internal_addr_t ia;
init_internal_addr(&ia);
ia.attr_set = LELEM(INTERNAL_IP4_ADDRESS)
| LELEM(INTERNAL_IP4_NETMASK);
@@ -582,14 +640,24 @@ modecfg_inR0(struct msg_digest *md)
struct state *const st = md->st;
u_int16_t isama_id;
internal_addr_t ia;
bool want_unity_banner;
stf_status stat, stat_build;
stat = modecfg_parse_msg(md, ISAKMP_CFG_REQUEST, &isama_id, &ia);
if (stat != STF_OK)
return stat;
want_unity_banner = (ia.unity_attr_set & LELEM(UNITY_BANNER - UNITY_BASE)) != LEMPTY;
init_internal_addr(&ia);
get_internal_addr(st->st_connection, &ia);
if (want_unity_banner)
{
ia.unity_banner = UNITY_BANNER_STR;
ia.unity_attr_set |= LELEM(UNITY_BANNER - UNITY_BASE);
}
plog("sending ModeCfg reply");
stat_build = modecfg_build_msg(st, &md->rbody
@@ -637,9 +705,15 @@ modecfg_send_set(struct state *st)
stf_status stat;
internal_addr_t ia;
init_internal_addr(&ia);
get_internal_addr(st->st_connection, &ia);
plog("sending ModeCfg set");
#ifdef CISCO_QUIRKS
ia.unity_banner = UNITY_BANNER_STR;
ia.unity_attr_set |= LELEM(UNITY_BANNER - UNITY_BASE);
#endif
plog("sending ModeCfg set");
st->st_state = STATE_MODE_CFG_R3;
stat = modecfg_send_msg(st, ISAKMP_CFG_SET, &ia);
if (stat == STF_OK)
@@ -658,7 +732,7 @@ modecfg_inI0(struct msg_digest *md)
struct state *const st = md->st;
u_int16_t isama_id;
internal_addr_t ia;
lset_t attr_set;
lset_t attr_set, unity_attr_set;
stf_status stat, stat_build;
plog("parsing ModeCfg set");
@@ -671,8 +745,10 @@ modecfg_inI0(struct msg_digest *md)
/* prepare ModeCfg ack which sends zero length attributes */
attr_set = ia.attr_set;
unity_attr_set = ia.unity_attr_set;
init_internal_addr(&ia);
ia.attr_set = attr_set & SUPPORTED_ATTR_SET;
ia.unity_attr_set = unity_attr_set & SUPPORTED_UNITY_ATTR_SET;
plog("sending ModeCfg ack");
@@ -720,8 +796,8 @@ xauth_send_request(struct state *st)
internal_addr_t ia;
init_internal_addr(&ia);
ia.attr_set = LELEM(XAUTH_USER_NAME - XAUTH_BASE + MODECFG_ROOF)
| LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE + MODECFG_ROOF);
ia.xauth_attr_set = LELEM(XAUTH_USER_NAME - XAUTH_BASE)
| LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE);
plog("sending XAUTH request");
st->st_state = STATE_XAUTH_R1;
@@ -751,18 +827,18 @@ xauth_inI0(struct msg_digest *md)
return stat;
/* check XAUTH attributes */
if ((ia.attr_set & LELEM(XAUTH_TYPE - XAUTH_BASE + MODECFG_ROOF)) != LEMPTY
if ((ia.xauth_attr_set & LELEM(XAUTH_TYPE - XAUTH_BASE)) != LEMPTY
&& ia.xauth_type != XAUTH_TYPE_GENERIC)
{
plog("xauth type %s is not supported", enum_name(&xauth_type_names, ia.xauth_type));
stat = STF_FAIL;
}
else if ((ia.attr_set & LELEM(XAUTH_USER_NAME - XAUTH_BASE + MODECFG_ROOF)) == LEMPTY)
else if ((ia.xauth_attr_set & LELEM(XAUTH_USER_NAME - XAUTH_BASE)) == LEMPTY)
{
plog("user name attribute is missing in XAUTH request");
stat = STF_FAIL;
}
else if ((ia.attr_set & LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE + MODECFG_ROOF)) == LEMPTY)
else if ((ia.xauth_attr_set & LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE)) == LEMPTY)
{
plog("user password attribute is missing in XAUTH request");
stat = STF_FAIL;
@@ -792,13 +868,13 @@ xauth_inI0(struct msg_digest *md)
, ia.xauth_secret.user_password.len
, ia.xauth_secret.user_password.ptr)
)
ia.attr_set = LELEM(XAUTH_USER_NAME - XAUTH_BASE + MODECFG_ROOF)
| LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE + MODECFG_ROOF);
ia.xauth_attr_set = LELEM(XAUTH_USER_NAME - XAUTH_BASE)
| LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE);
}
else
{
ia.attr_set = LELEM(XAUTH_STATUS - XAUTH_BASE + MODECFG_ROOF);
ia.xauth_status = FALSE;
ia.xauth_attr_set = LELEM(XAUTH_STATUS - XAUTH_BASE);
ia.xauth_status = XAUTH_STATUS_FAIL;
}
plog("sending XAUTH reply");
@@ -847,7 +923,7 @@ xauth_inR1(struct msg_digest *md)
return stat;
/* did the client return an XAUTH FAIL status? */
if ((ia.attr_set & LELEM(XAUTH_STATUS - XAUTH_BASE + MODECFG_ROOF)) != LEMPTY)
if ((ia.xauth_attr_set & LELEM(XAUTH_STATUS - XAUTH_BASE)) != LEMPTY)
{
plog("received FAIL status in XAUTH reply");
@@ -857,12 +933,12 @@ xauth_inR1(struct msg_digest *md)
}
/* check XAUTH reply */
if ((ia.attr_set & LELEM(XAUTH_USER_NAME - XAUTH_BASE + MODECFG_ROOF)) == LEMPTY)
if ((ia.xauth_attr_set & LELEM(XAUTH_USER_NAME - XAUTH_BASE)) == LEMPTY)
{
plog("user name attribute is missing in XAUTH reply");
st->st_xauth.status = FALSE;
}
else if ((ia.attr_set & LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE + MODECFG_ROOF)) == LEMPTY)
else if ((ia.xauth_attr_set & LELEM(XAUTH_USER_PASSWORD - XAUTH_BASE)) == LEMPTY)
{
plog("user password attribute is missing in XAUTH reply");
st->st_xauth.status = FALSE;
@@ -886,8 +962,8 @@ xauth_inR1(struct msg_digest *md)
/* prepare XAUTH set which sends the authentication status */
init_internal_addr(&ia);
ia.attr_set = LELEM(XAUTH_STATUS - XAUTH_BASE + MODECFG_ROOF);
ia.xauth_status = st->st_xauth.status;
ia.xauth_attr_set = LELEM(XAUTH_STATUS - XAUTH_BASE);
ia.xauth_status = (st->st_xauth.status)? XAUTH_STATUS_OK : XAUTH_STATUS_FAIL;
plog("sending XAUTH status:");