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/*
Unix SMB/CIFS implementation.
SMB2 Lease context handling
Copyright (C) Stefan Metzmacher 2012
Copyright (C) Volker Lendecke 2013
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 Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../libcli/smb/smb_common.h"
/**
* Pull a lease off the wire into a struct smb2_lease.
*
* Note: the caller MUST zero initialize "lease".
**/
ssize_t smb2_lease_pull(const uint8_t *buf, size_t len,
struct smb2_lease *lease)
{
int version;
switch (len) {
case 32:
version = 1;
break;
case 52:
version = 2;
break;
default:
return -1;
}
lease->lease_key.data[0] = PULL_LE_U64(buf, 0);
lease->lease_key.data[1] = PULL_LE_U64(buf, 8);
lease->lease_state = PULL_LE_U32(buf, 16);
lease->lease_version = version;
switch (version) {
case 1:
break;
case 2:
lease->lease_flags = PULL_LE_U32(buf, 20);
lease->lease_duration = PULL_LE_U64(buf, 24);
lease->lease_flags &= SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET;
if (lease->lease_flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET) {
lease->parent_lease_key.data[0] = PULL_LE_U64(buf, 32);
lease->parent_lease_key.data[1] = PULL_LE_U64(buf, 40);
}
lease->lease_epoch = PULL_LE_U16(buf, 48);
break;
}
return len;
}
bool smb2_lease_push(const struct smb2_lease *lease, uint8_t *buf, size_t len)
{
int version;
switch (len) {
case 32:
version = 1;
break;
case 52:
version = 2;
break;
default:
return false;
}
PUSH_LE_U64(buf, 0, lease->lease_key.data[0]);
PUSH_LE_U64(buf, 8, lease->lease_key.data[1]);
PUSH_LE_U32(buf, 16, lease->lease_state);
PUSH_LE_U32(buf, 20, lease->lease_flags);
PUSH_LE_U64(buf, 24, lease->lease_duration);
if (version == 2) {
PUSH_LE_U64(buf, 32, lease->parent_lease_key.data[0]);
PUSH_LE_U64(buf, 40, lease->parent_lease_key.data[1]);
PUSH_LE_U16(buf, 48, lease->lease_epoch);
PUSH_LE_U16(buf, 50, 0); /* reserved */
}
return true;
}
bool smb2_lease_key_equal(const struct smb2_lease_key *k1,
const struct smb2_lease_key *k2)
{
return ((k1->data[0] == k2->data[0]) && (k1->data[1] == k2->data[1]));
}
bool smb2_lease_equal(const struct GUID *g1,
const struct smb2_lease_key *k1,
const struct GUID *g2,
const struct smb2_lease_key *k2)
{
return GUID_equal(g1, g2) && smb2_lease_key_equal(k1, k2);
}
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