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/* Copyright (C) 2017-2020 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* 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
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
use std::string::String;
use crate::jsonbuilder::{JsonBuilder, JsonError};
use crate::nfs::types::*;
use crate::nfs::nfs::*;
use crc::crc32;
#[no_mangle]
pub extern "C" fn rs_nfs_tx_logging_is_filtered(state: &mut NFSState,
tx: &mut NFSTransaction)
-> u8
{
// TODO probably best to make this configurable
if state.nfs_version <= 3 && tx.procedure == NFSPROC3_GETATTR {
return 1;
}
return 0;
}
fn nfs_rename_object(tx: &NFSTransaction, js: &mut JsonBuilder)
-> Result<(), JsonError>
{
let from_str = String::from_utf8_lossy(&tx.file_name);
js.set_string("from", &from_str)?;
let to_vec = match tx.type_data {
Some(NFSTransactionTypeData::RENAME(ref x)) => { x.to_vec() },
_ => { Vec::new() }
};
let to_str = String::from_utf8_lossy(&to_vec);
js.set_string("to", &to_str)?;
Ok(())
}
fn nfs_creds_object(tx: &NFSTransaction, js: &mut JsonBuilder)
-> Result<(), JsonError>
{
let mach_name = String::from_utf8_lossy(&tx.request_machine_name);
js.set_string("machine_name", &mach_name)?;
js.set_uint("uid", tx.request_uid as u64)?;
js.set_uint("gid", tx.request_gid as u64)?;
Ok(())
}
fn nfs_file_object(tx: &NFSTransaction, js: &mut JsonBuilder)
-> Result<(), JsonError>
{
js.set_bool("first", tx.is_first)?;
js.set_bool("last", tx.is_last)?;
if let Some(NFSTransactionTypeData::FILE(ref tdf)) = tx.type_data {
js.set_uint("last_xid", tdf.file_last_xid as u64)?;
js.set_uint("chunks", tdf.chunk_count as u64)?;
}
Ok(())
}
/*
fn nfs_handle2hex(bytes: &Vec<u8>) -> String {
let strings: Vec<String> = bytes.iter()
.map(|b| format!("{:02x}", b))
.collect();
strings.join("")
}
*/
fn nfs_handle2crc(bytes: &[u8]) -> u32 {
let c = crc32::checksum_ieee(bytes);
c
}
fn nfs_common_header(state: &NFSState, tx: &NFSTransaction, js: &mut JsonBuilder)
-> Result<(), JsonError>
{
js.set_uint("version", state.nfs_version as u64)?;
let proc_string = if state.nfs_version < 4 {
nfs3_procedure_string(tx.procedure)
} else {
nfs4_procedure_string(tx.procedure)
};
js.set_string("procedure", &proc_string)?;
let file_name = String::from_utf8_lossy(&tx.file_name);
js.set_string("filename", &file_name)?;
if !tx.file_handle.is_empty() {
//js.set_string("handle", &nfs_handle2hex(&tx.file_handle));
let c = nfs_handle2crc(&tx.file_handle);
let s = format!("{:x}", c);
js.set_string("hhash", &s)?;
}
js.set_uint("id", tx.id)?;
js.set_bool("file_tx", tx.is_file_tx)?;
Ok(())
}
fn nfs_log_request(state: &NFSState, tx: &NFSTransaction, js: &mut JsonBuilder)
-> Result<(), JsonError>
{
nfs_common_header(state, tx, js)?;
js.set_string("type", "request")?;
Ok(())
}
#[no_mangle]
pub extern "C" fn rs_nfs_log_json_request(state: &mut NFSState, tx: &mut NFSTransaction,
js: &mut JsonBuilder) -> bool
{
nfs_log_request(state, tx, js).is_ok()
}
fn nfs_log_response(state: &NFSState, tx: &NFSTransaction, js: &mut JsonBuilder)
-> Result<(), JsonError>
{
nfs_common_header(state, tx, js)?;
js.set_string("type", "response")?;
js.set_string("status", &nfs3_status_string(tx.nfs_response_status))?;
if state.nfs_version <= 3 {
if tx.procedure == NFSPROC3_READ {
js.open_object("read")?;
nfs_file_object(tx, js)?;
js.close()?;
} else if tx.procedure == NFSPROC3_WRITE {
js.open_object("write")?;
nfs_file_object(tx, js)?;
js.close()?;
} else if tx.procedure == NFSPROC3_RENAME {
js.open_object("rename")?;
nfs_rename_object(tx, js)?;
js.close()?;
}
}
Ok(())
}
#[no_mangle]
pub extern "C" fn rs_nfs_log_json_response(state: &mut NFSState, tx: &mut NFSTransaction,
js: &mut JsonBuilder) -> bool
{
nfs_log_response(state, tx, js).is_ok()
}
fn rpc_log_response(tx: &NFSTransaction, js: &mut JsonBuilder)
-> Result<(), JsonError>
{
js.set_uint("xid", tx.xid as u64)?;
js.set_string("status", &rpc_status_string(tx.rpc_response_status))?;
js.set_string("auth_type", &rpc_auth_type_string(tx.auth_type))?;
if tx.auth_type == RPCAUTH_UNIX {
js.open_object("creds")?;
nfs_creds_object(tx, js)?;
js.close()?;
}
Ok(())
}
#[no_mangle]
pub extern "C" fn rs_rpc_log_json_response(tx: &mut NFSTransaction,
js: &mut JsonBuilder) -> bool
{
rpc_log_response(tx, js).is_ok()
}
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