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/* -*- mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil; -*- */
/*
Copyright (C) 2016 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef STDC_HEADERS
#include <stddef.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include "compat.h"
#include "smb2.h"
#include "libsmb2.h"
#include "libsmb2-private.h"
static int
smb2_encode_echo_request(struct smb2_context *smb2,
struct smb2_pdu *pdu)
{
uint8_t *buf;
int len;
struct smb2_iovec *iov;
len = SMB2_ECHO_REQUEST_SIZE;
buf = calloc(len, sizeof(uint8_t));
if (buf == NULL) {
smb2_set_error(smb2, "Failed to allocate echo buffer");
return -1;
}
iov = smb2_add_iovector(smb2, &pdu->out, buf, len, free);
if (iov == NULL) {
smb2_set_error(smb2, "Failed to add iovector for echo request");
return -1;
}
smb2_set_uint16(iov, 0, SMB2_ECHO_REQUEST_SIZE);
return 0;
}
struct smb2_pdu *
smb2_cmd_echo_async(struct smb2_context *smb2,
smb2_command_cb cb, void *cb_data)
{
struct smb2_pdu *pdu;
pdu = smb2_allocate_pdu(smb2, SMB2_ECHO, cb, cb_data);
if (pdu == NULL) {
return NULL;
}
if (smb2_encode_echo_request(smb2, pdu)) {
smb2_free_pdu(smb2, pdu);
return NULL;
}
if (smb2_pad_to_64bit(smb2, &pdu->out) != 0) {
smb2_free_pdu(smb2, pdu);
return NULL;
}
return pdu;
}
static int
smb2_encode_echo_reply(struct smb2_context *smb2,
struct smb2_pdu *pdu)
{
uint8_t *buf;
int len;
struct smb2_iovec *iov;
len = SMB2_ECHO_REPLY_SIZE;
buf = calloc(len, sizeof(uint8_t));
if (buf == NULL) {
smb2_set_error(smb2, "Failed to allocate echo buffer");
return -1;
}
iov = smb2_add_iovector(smb2, &pdu->out, buf, len, free);
if (iov == NULL) {
smb2_set_error(smb2, "Failed to add iovector for echo reply");
return -1;
}
smb2_set_uint16(iov, 0, SMB2_ECHO_REPLY_SIZE);
return 0;
}
struct smb2_pdu *
smb2_cmd_echo_reply_async(struct smb2_context *smb2,
smb2_command_cb cb, void *cb_data)
{
struct smb2_pdu *pdu;
pdu = smb2_allocate_pdu(smb2, SMB2_ECHO, cb, cb_data);
if (pdu == NULL) {
return NULL;
}
if (smb2_encode_echo_reply(smb2, pdu)) {
smb2_free_pdu(smb2, pdu);
return NULL;
}
if (smb2_pad_to_64bit(smb2, &pdu->out) != 0) {
smb2_free_pdu(smb2, pdu);
return NULL;
}
return pdu;
}
int
smb2_process_echo_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu)
{
struct smb2_iovec *iov = &smb2->in.iov[smb2->in.niov - 1];
uint16_t struct_size;
smb2_get_uint16(iov, 0, &struct_size);
if (struct_size != SMB2_ECHO_REPLY_SIZE ||
(struct_size & 0xfffe) != iov->len) {
smb2_set_error(smb2, "Unexpected size of echo "
"reply. Expected %d, got %d",
SMB2_ECHO_REPLY_SIZE,
(int)iov->len);
return -1;
}
return 0;
}
int
smb2_process_echo_request_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu)
{
struct smb2_echo_request *req;
struct smb2_iovec *iov = &smb2->in.iov[smb2->in.niov - 1];
uint16_t struct_size;
smb2_get_uint16(iov, 0, &struct_size);
if (struct_size != SMB2_ECHO_REQUEST_SIZE ||
(struct_size & 0xfffe) != iov->len) {
smb2_set_error(smb2, "Unexpected size of echo "
"request. Expected %d, got %d",
SMB2_ECHO_REQUEST_SIZE,
(int)iov->len);
return -1;
}
req = malloc(sizeof(*req));
if (req == NULL) {
smb2_set_error(smb2, "Failed to allocate echo request");
return -1;
}
pdu->payload = req;
return 0;
}
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