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Going open; lost my will to finish this piece; the only feature left is sending text; changed license

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  1. 661
      COPYING
  2. 9
      LICENSE
  3. 47
      PROTOCOL
  4. 6
      README.md
  5. 5
      TODO
  6. 50
      src/args/parser.rs
  7. 15
      src/crypt/keys.rs
  8. 16
      src/crypt/rand.rs
  9. 15
      src/crypt/xor.rs
  10. 155
      src/fsys/file.rs
  11. 44
      src/main.rs
  12. 139
      src/nodes/recv_node.rs
  13. 177
      src/nodes/send_node.rs
  14. 163
      src/protocol/packets.rs
  15. 17
      src/protocol/specs.rs
  16. 23
      src/util/buf_read.rs
  17. 15
      src/util/error.rs
  18. 15
      src/util/local_ip.rs

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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

9
LICENSE
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@ -0,0 +1,9 @@
The MIT License (MIT)
Copyright © 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

47
PROTOCOL
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@ -1,47 +0,0 @@
--- DDTU PROTOCOL v1 ---
- High level overview -
- Node Modes -
[Receive]
Is for receiving information.
[Send]
Is for sending data to the receiving end.
[Sync]
Is for syncing one directory among 2 ends. (Make contents the same on both sides)
[Daemon]
Is used to create a longstanding sync daemon which syncs the directory with all incoming
sync connections
All infomation|commands are sent via packets with specific structure
- Packet bytes representation -
First 16 bytes - the total packet length
The next 1 byte - number that represents this packet's type (ID) where:
1: HANDSHAKE PACKET
2: HANDSHAKE ACCEPT
3: CONNECTION SHUTDOWN PACKET
4: TEXT PACKET
5: FILEINFO PACKET
6: FILEDATA PACKET
7: FILE ACCEPT PACKET
8: FILE REJECT PACKET
Then the internal structure varies from one packet type to the other,
but the content-types are encoded as follows:
u8 - just 1 BE byte
u128 - 16 BE bytes
String - u128 representing the string length and then UTF-8 encoded character bytes
[u8] - u128 as the length of a byte array, then the array itself
bool - convert it to u8 where 0 == false, 1 == true
- Packets -
[Handshake]
This is the first packet that must be sent by connecting node to waiting node.
Its existence tells the receiving end that the

6
README.md
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@ -1,2 +1,6 @@
# ddtu - digital data transferring utility # ddtu - digital data transferring utility
### Transfer one thing from __here__ to __there__ via the Internet connection Or ... well, could've been
The project's been abandoned for uncertain amount of time.
It can send text though =D

5
TODO
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@ -1,5 +0,0 @@
-1. Write base foundation for sending and receiving information-
-2. Wire it all together-
3. Make it encrypted
4. Allow receiving node to connect as well
5. Daemon

50
src/args/parser.rs
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@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use crate::util::error::Error; use crate::util::error::Error;
use crate::protocol::specs::RunMode; use crate::protocol::specs::RunMode;
use std::path; use std::path;
@ -44,7 +29,7 @@ impl Args {
help: false, help: false,
version: false, version: false,
verbose_output: false, verbose_output: false,
mode: RunMode::DAEMON, mode: RunMode::RECEIVE,
send_type: DataType::TEXT, send_type: DataType::TEXT,
address_str: "".to_string(), address_str: "".to_string(),
send_path: path::PathBuf::new(), send_path: path::PathBuf::new(),
@ -157,39 +142,6 @@ pub fn parse(raw_args: &Vec<String>) -> Result<Args, Error> {
break; break;
} }
"sync" => {
parsed_args.mode = RunMode::SYNC;
if arg_amount < 3 && !parsed_args.verbose_output {
return Err(Error::new("not enough arguments for syncing"));
} else if arg_amount < 4 && !parsed_args.verbose_output {
return Err(Error::new("not enough arguments for syncing"));
}
let arg_index: usize;
match parsed_args.verbose_output {
true => {
arg_index = 3;
}
false => {
arg_index = 2;
}
}
let sync_path: &path::Path = path::Path::new(raw_args[arg_index].as_str());
if !sync_path.exists() || !sync_path.is_dir() {
return Err(Error::new(format!("{} does not exist or is not a directory", sync_path.display()).as_str()));
}
break;
}
"daemon" => {
parsed_args.mode = RunMode::DAEMON;
break;
}
_ => { _ => {
return Err(Error::new(format!("invalid argument {}", raw_args[arg_index]).as_str())); return Err(Error::new(format!("invalid argument {}", raw_args[arg_index]).as_str()));
} }

15
src/crypt/keys.rs
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@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use crate::crypt::rand; use crate::crypt::rand;
use std::time::{SystemTime, UNIX_EPOCH}; use std::time::{SystemTime, UNIX_EPOCH};

16
src/crypt/rand.rs
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@ -1,19 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
pub fn rand_u16(seed: u16) -> u16 { pub fn rand_u16(seed: u16) -> u16 {
return ((seed & 47851) + (seed >> 8 | 7943)) as u16; return ((seed & 47851) + (seed >> 8 | 7943)) as u16;
} }

15
src/crypt/xor.rs
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@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use crate::crypt::keys::Key8bit; use crate::crypt::keys::Key8bit;
pub fn encrypt(plain: &mut [u8], key: &Key8bit) { pub fn encrypt(plain: &mut [u8], key: &Key8bit) {

155
src/fsys/file.rs
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@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use crate::util::error::Error; use crate::util::error::Error;
use std::io::SeekFrom; use std::io::SeekFrom;
use std::io::Seek; use std::io::Seek;
@ -38,11 +23,8 @@ impl ChunkedFile {
/// Create a new, ready-to-write chunked regular file /// Create a new, ready-to-write chunked regular file
pub fn new(path: &std::path::Path, size: u128, chunk_size: u128) -> Result<ChunkedFile, Error> { pub fn new(path: &std::path::Path, size: u128, chunk_size: u128) -> Result<ChunkedFile, Error> {
let file_handle: std::fs::File; match std::fs::File::options().truncate(false).write(true).create(true).open(path) {
match std::fs::File::create(path) { Ok(_) => {}
Ok(fh) => {
file_handle = fh;
}
Err(error) => { Err(error) => {
return Err( return Err(
@ -57,14 +39,14 @@ impl ChunkedFile {
new_chunked_file.path = path.to_path_buf(); new_chunked_file.path = path.to_path_buf();
// resize file // resize file
match file_handle.set_len(size as u64) { // match file_handle.set_len(size as u64) {
Ok(()) => {} // Ok(()) => {}
Err(error) => { // Err(error) => {
return Err( // return Err(
Error::new(format!("could not resize \'{}\': {}", path.display(), error).as_str()) // Error::new(format!("could not resize \'{}\': {}", path.display(), error).as_str())
); // );
} // }
} // }
new_chunked_file.size = size; new_chunked_file.size = size;
// chunks // chunks
@ -114,13 +96,11 @@ impl ChunkedFile {
return Ok(new_chunked_file); return Ok(new_chunked_file);
} }
pub fn read_chunk(&self, buf: &mut [u8], chunk_no: u128) -> Option<Error> { pub fn read_chunk(&self, chunk_no: u128) -> Result<Vec<u8>, Error> {
if chunk_no > self.chunks_amount { if chunk_no + 1 > self.chunks_amount {
return Some(Error::new("chunk number is bigger than there are chunks")); return Err(
} Error::new(format!("chunk index ({}) is bigger than there are chunks ({})", chunk_no, self.chunks_amount).as_str())
);
if (buf.len() as u128) < self.chunk_size {
return Some(Error::new("buffer is too small to fit a chunk"));
} }
// open underlying file // open underlying file
@ -130,7 +110,7 @@ impl ChunkedFile {
file_handle = fh; file_handle = fh;
} }
Err(error) => { Err(error) => {
return Some(Error::new(format!("{}", error).as_str())); return Err(Error::new(format!("{}", error).as_str()));
} }
} }
@ -139,34 +119,45 @@ impl ChunkedFile {
match file_handle.seek(SeekFrom::Start(chunk_start_pos as u64)) { match file_handle.seek(SeekFrom::Start(chunk_start_pos as u64)) {
Ok(_) => {} Ok(_) => {}
Err(error) => { Err(error) => {
return Some(Error::new(format!("seek error: {}", error).as_str())) return Err(Error::new(format!("seek error: {}", error).as_str()))
} }
} }
match file_handle.read(buf) { let bytes_to_read: u128;
if chunk_start_pos + self.chunk_size > self.size {
bytes_to_read = chunk_start_pos + self.chunk_size - self.size;
} else {
bytes_to_read = self.chunk_size;
}
// read call leaves buf empty if it is not pre-initialized beforehand
let mut buf: Vec<u8> = vec!(0; bytes_to_read as usize);
match file_handle.read_exact(&mut buf) {
Ok(_) => {} Ok(_) => {}
Err(error) => { Err(error) => {
return Some(Error::new(format!("read error: {}", error).as_str())) return Err(Error::new(format!("read error: {}", error).as_str()))
} }
} }
return None; return Ok(Vec::from(buf));
} }
pub fn write_chunk(&mut self, chunk: &[u8], chunk_no: u128) -> Option<Error> { pub fn write_chunk(&mut self, chunk: &[u8], chunk_no: u128) -> Result<(),Error> {
if chunk_no > self.chunks_amount { if chunk_no + 1 > self.chunks_amount {
// can't write outsize of pre-determined boundaries of a file ! // can't write outsize of pre-determined boundaries of a file !
return Some(Error::new("chunk number is bigger than there are chunks")); return Err(
Error::new(format!("chunk index ({}) is bigger than there are chunks ({})", chunk_no, self.chunks_amount).as_str())
);
} }
if (chunk.len() as u128) < self.chunk_size && chunk_no != self.chunks_amount { if (chunk.len() as u128) < self.chunk_size && chunk_no + 1 != self.chunks_amount {
// unfull chunk in the middle of a file // unfull chunk in the middle of a file
return Some(Error::new("cannot write unfull chunk in a not last position")); return Err(Error::new("cannot write unfull chunk in a not last position"));
} }
if (chunk.len() as u128) > self.chunk_size { if (chunk.len() as u128) > self.chunk_size {
// too big chunk // too big chunk
return Some(Error::new("chunk is too big")); return Err(Error::new("chunk is too big"));
} }
// open file and write a new chunk // open file and write a new chunk
@ -177,7 +168,7 @@ impl ChunkedFile {
} }
Err(error) => { Err(error) => {
return Some(Error::new(format!("{}", error).as_str())); return Err(Error::new(format!("{}", error).as_str()));
} }
} }
@ -185,17 +176,81 @@ impl ChunkedFile {
match file_handle.seek(SeekFrom::Start(chunk_start_pos as u64)) { match file_handle.seek(SeekFrom::Start(chunk_start_pos as u64)) {
Ok(_) => {} Ok(_) => {}
Err(error) => { Err(error) => {
return Some(Error::new(format!("seek error: {}", error).as_str())); return Err(Error::new(format!("seek error: {}", error).as_str()));
} }
} }
match file_handle.write_all(chunk) { match file_handle.write_all(chunk) {
Ok(()) => {} Ok(()) => {}
Err(error) => { Err(error) => {
return Some(Error::new(format!("write error: {}", error).as_str())) return Err(Error::new(format!("write error: {}", error).as_str()))
}
}
return Ok(());
}
}
#[cfg(test)]
mod tests {
use crate::fsys::file::ChunkedFile;
#[test]
fn test_file_operations() {
let mut test_contents: Vec<u8> = vec!(0; 250);
for i in 0..250 {
test_contents[i] = i as u8;
}
{
let mut new_file: ChunkedFile;
match ChunkedFile::new(std::path::Path::new("testfile"), 255, 10) {
Ok(f) => {
new_file = f;
}
Err(error) => {
panic!("{}", error.text);
} }
} }
return None; for i in 0..250/10 {
if let Err(error) = new_file.write_chunk(&test_contents[i*10..i*10+10], i as u128) {
panic!("{}", error.text);
}
}
}
let chunked_file: ChunkedFile;
match ChunkedFile::from(std::path::Path::new("testfile"), 10) {
Ok(f) => {
chunked_file = f;
}
Err(error) => {
panic!("{}", error.text);
}
}
let mut read_contents: Vec<u8> = Vec::new();
for i in 0..250/10 {
match chunked_file.read_chunk(i) {
Ok(chunk) => {
read_contents.extend_from_slice(&chunk);
}
Err(error) => {
panic!("{}", error.text);
}
}
}
// panic!("{:?} ---- {:?}", read_contents, test_contents);
for i in 0..250 {
if read_contents[i] != test_contents[i] {
panic!("contents do not match");
}
}
} }
} }

44
src/main.rs
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@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
mod util; mod util;
mod protocol; mod protocol;
mod args; mod args;
@ -22,6 +7,7 @@ mod nodes;
use protocol::specs::RunMode; use protocol::specs::RunMode;
use args::parser::Args; use args::parser::Args;
use args::parser::DataType;
use nodes::recv_node::RecvOptions; use nodes::recv_node::RecvOptions;
use nodes::send_node::SendOptions; use nodes::send_node::SendOptions;
@ -39,8 +25,6 @@ ddtu [FLAG] [MODE] [MODE-specific arguments]
[MODE] [MODE]
[send]: ddtu send [TYPE] [SRC] [ADDR] -> send [SRC] of [TYPE] to [ADDR] [send]: ddtu send [TYPE] [SRC] [ADDR] -> send [SRC] of [TYPE] to [ADDR]
[recv]: ddtu recv [DIR](optional) -> wait for connection and receive anything from another ddtu instance, saving it to [DIR] [recv]: ddtu recv [DIR](optional) -> wait for connection and receive anything from another ddtu instance, saving it to [DIR]
[sync]: ddtu sync [DIR] [ADDR] -> sync [DIRectory] contents with another ddtu instance on [ADDR]
[daemon]: ddtu daemon -> start sync daemon
[TYPE] [TYPE]
[text]: ddtu send text \'text to send\' -> send text [text]: ddtu send text \'text to send\' -> send text
@ -93,7 +77,7 @@ fn main() {
} }
match nodes::recv_node::start( match nodes::recv_node::start(
RecvOptions::new(format!("0.0.0.0:{}", DEFAULT_PORT), args.save_directory), args.verbose_output) { &mut RecvOptions::new(format!("0.0.0.0:{}", DEFAULT_PORT), args.save_directory), args.verbose_output) {
Ok(_) => {} Ok(_) => {}
Err(error) => { Err(error) => {
println!("Error receiving: {}", error.text); println!("Error receiving: {}", error.text);
@ -103,13 +87,29 @@ fn main() {
} }
RunMode::SEND => { RunMode::SEND => {
match args.send_type {
DataType::DIR => {
println!("Sending directory is not implemented");
return;
}
DataType::FILE => {
println!("Sending files is not implemented");
return;
}
_ => {}
}
match nodes::send_node::start( match nodes::send_node::start(
SendOptions::new( SendOptions::new(
args.address_str, args.address_str,
args.send_type, args.send_type,
args.text_to_send, args.text_to_send,
args.send_path, args.send_path,
), args.verbose_output) { ), args.verbose_output)
{
Ok(_) => {} Ok(_) => {}
Err(error) => { Err(error) => {
@ -118,11 +118,5 @@ fn main() {
} }
} }
} }
RunMode::DAEMON => {
}
RunMode::SYNC => {
}
} }
} }

139
src/nodes/recv_node.rs
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@ -1,23 +1,10 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use crate::util::error::Error; use crate::util::error::Error;
use crate::protocol::specs::Packet; use crate::protocol::specs::Packet;
use crate::protocol::packets::{read_next_packet, send_packet}; use crate::protocol::packets::{read_next_packet, send_packet};
use crate::protocol::packets; use crate::protocol::packets;
use crate::protocol::specs; use crate::protocol::specs;
// use crate::fsys;
// use std::collections::HashMap;
use std::path; use std::path;
use std::net; use std::net;
use std::sync::mpsc::{Sender, Receiver}; use std::sync::mpsc::{Sender, Receiver};
@ -39,9 +26,9 @@ impl RecvOptions {
} }
pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> { pub fn start(options: &mut RecvOptions, verbose_output: bool) -> Result<(), Error> {
let listener: net::TcpListener; let listener: net::TcpListener;
match net::TcpListener::bind(options.listen_address) { match net::TcpListener::bind(&options.listen_address) {
Ok(l) => { Ok(l) => {
listener = l; listener = l;
} }
@ -55,7 +42,7 @@ pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> {
// reject any connection that doesn't provide handshake information // reject any connection that doesn't provide handshake information
let mut connection: net::TcpStream; let mut connection: net::TcpStream;
let mut address: net::SocketAddr; let mut address: net::SocketAddr;
let mut handshake: packets::Handshake; let handshake: packets::Handshake;
loop { loop {
match listener.accept() { match listener.accept() {
Ok((c, a)) => { Ok((c, a)) => {
@ -121,7 +108,20 @@ pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> {
} }
} }
// now read and process incoming packets; essentialy receiving something !
// remember file IDs and paths
// let mut monitored_files: HashMap<u64, packets::FileInfo> = HashMap::new();
// create save directory
match std::fs::create_dir_all(&options.save_directory) {
Ok(_) => {}
Err(error) => {
if verbose_output {
println!("Could not create save directory: {}; saving to current one", error);
}
options.save_directory = path::Path::new(".").to_path_buf();
}
}
// launch a new packet reading thread // launch a new packet reading thread
let (ch_send, ch_recv): (Sender<Packet>, Receiver<Packet>) = mpsc::channel(); let (ch_send, ch_recv): (Sender<Packet>, Receiver<Packet>) = mpsc::channel();
@ -131,15 +131,14 @@ pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> {
Ok(cc) => { Ok(cc) => {
cloned_connection = cc; cloned_connection = cc;
} }
Err(_) => { Err(_) => {
packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key); packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
return Err( return Err(
Error::new("could not clone connection") Error::new("could not clone connection")
); );
} }
} }
cloned_connection.set_read_timeout(Some(std::time::Duration::from_secs(5)));
let handshake_clone: packets::Handshake = handshake.clone(); let handshake_clone: packets::Handshake = handshake.clone();
thread::spawn(move || { thread::spawn(move || {
@ -157,7 +156,7 @@ pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> {
if verbose_output { if verbose_output {
println!("Could not read packet: {}", error.text); println!("Could not read packet: {}", error.text);
} }
continue; return;
} }
} }
} }
@ -171,10 +170,8 @@ pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> {
Ok(p) => { Ok(p) => {
incoming_packet = p; incoming_packet = p;
} }
Err(error) => { Err(error) => {
packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key); packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
return Err(Error::new( return Err(Error::new(
format!("error receiving a new packet from listener thread: {}", error).as_str() format!("error receiving a new packet from listener thread: {}", error).as_str()
)); ));
@ -184,11 +181,11 @@ pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> {
match incoming_packet.header { match incoming_packet.header {
specs::CONNECTION_SHUTDOWN_PACKET_ID => { specs::CONNECTION_SHUTDOWN_PACKET_ID => {
if verbose_output { if verbose_output {
println!("{} shuts down the connection", address); println!("Connection has been shut down");
} }
packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key); packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
break; return Ok(());
} }
specs::TEXT_PACKET_ID => { specs::TEXT_PACKET_ID => {
@ -208,9 +205,95 @@ pub fn start(options: RecvOptions, verbose_output: bool) -> Result<(), Error> {
} }
} }
// specs::FILEINFO_PACKET_ID => {
// match packets::FileInfo::from_raw(&incoming_packet) {
// Ok(mut fileinfo_packet) => {
// // create it
// if let Err(error) = std::fs::File::create(&options.save_directory.join(&fileinfo_packet.relative_path)) {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(
// Error::new(
// format!("could not create a new file {}: {}", fileinfo_packet.filename, error).as_str()
// ),
// )
// }
// // accept it
// if let Err(error) = send_packet(
// &mut connection,
// &packets::FileAccept{}.as_raw(),
// handshake.encryption_type,
// &handshake.encryption_key,
// ) {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(
// Error::new(format!("could not accept file {}: {}", fileinfo_packet.filename, error.text).as_str()),
// )
// }
// println!("\nReceiving \"{}\" ({} MB))", fileinfo_packet.filename, fileinfo_packet.filesize as f32/1024.0/1024.0);
// // monitor
// fileinfo_packet.relative_path = options.save_directory.join(fileinfo_packet.relative_path).to_string_lossy().into_owned();
// monitored_files.insert(
// fileinfo_packet.file_id, fileinfo_packet,
// );
// }
// Err(error) => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(Error::new(format!("error getting a fileinfo packet: {}", error.text).as_str()));
// }
// }
// }
// specs::FILEDATA_PACKET_ID => {
// let filedata_packet: packets::FileData;
// match packets::FileData::from_raw(&incoming_packet) {
// Ok(fd_packet) => {
// filedata_packet = fd_packet;
// }
// Err(error) => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(Error::new(format!("error getting a filedata packet: {}", error.text).as_str()));
// }
// }
// // check if this file indeed was notified about
// match monitored_files.get(&filedata_packet.file_id) {
// None => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(Error::new(format!("file with ID {} was not notified about", filedata_packet.file_id).as_str()));
// }
// Some(file_info) => {
// // open file
// let mut chunked_file: fsys::file::ChunkedFile;
// match fsys::file::ChunkedFile::new(&path::Path::new(&file_info.relative_path), file_info.filesize, handshake.chunk_size as u128) {
// Ok(f) => {
// chunked_file = f;
// }
// Err(error) => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(
// Error::new(format!("error opening chunked file {}: {}", file_info.filename, error.text).as_str())
// );
// }
// }
// // write required chunk
// if let Err(error) = chunked_file.write_chunk(&filedata_packet.chunk, filedata_packet.chunk_no as u128) {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(
// Error::new(format!("error writing a chunk to {}: {}", file_info.filename, error.text).as_str()),
// );
// }
// }
// }
// }
_ => {} _ => {}
} }
} }
return Ok(());
} }

177
src/nodes/send_node.rs
Unescape View File

@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use crate::util::error::Error; use crate::util::error::Error;
use crate::args::parser::DataType; use crate::args::parser::DataType;
use crate::crypt; use crate::crypt;
@ -20,6 +5,7 @@ use crate::protocol::packets;
use crate::protocol::packets::{send_packet, read_next_packet}; use crate::protocol::packets::{send_packet, read_next_packet};
use crate::protocol::specs; use crate::protocol::specs;
use crate::protocol::specs::Packet; use crate::protocol::specs::Packet;
use crate::fsys;
use std::thread; use std::thread;
use std::sync::mpsc::{Sender, Receiver}; use std::sync::mpsc::{Sender, Receiver};
use std::sync::mpsc; use std::sync::mpsc;
@ -66,6 +52,7 @@ pub fn start(options: SendOptions, verbose_output: bool) -> Result<(), Error> {
// send handshake // send handshake
let handshake: packets::Handshake = packets::Handshake{ let handshake: packets::Handshake = packets::Handshake{
protocol_version: specs::PROTOCOL_VERSION_1, protocol_version: specs::PROTOCOL_VERSION_1,
chunk_size: specs::CHUNK_SIZE as u64,
encryption_type: specs::ECRYPTION_XOR, encryption_type: specs::ECRYPTION_XOR,
encryption_key: crypt::keys::Key8bit::new_random().as_bytes(), encryption_key: crypt::keys::Key8bit::new_random().as_bytes(),
}; };
@ -114,48 +101,6 @@ pub fn start(options: SendOptions, verbose_output: bool) -> Result<(), Error> {
} }
// handshake has been accepted // handshake has been accepted
// launch a new packet reading thread
let (ch_send, _ch_recv): (Sender<Packet>, Receiver<Packet>) = mpsc::channel();
let mut cloned_connection: net::TcpStream;
match connection.try_clone() {
Ok(cc) => {
cloned_connection = cc;
}
Err(_) => {
packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
return Err(
Error::new("could not clone connection")
);
}
}
let handshake_clone = handshake.clone();
thread::spawn(move || {
loop {
match read_next_packet(&mut cloned_connection, handshake_clone.encryption_type, &handshake_clone.encryption_key) {
Ok(packet) => {
if let Err(_) = ch_send.send(packet) {
// the channel has been hung up
// return from this thread
return;
}
}
Err(error) => {
if verbose_output {
println!("Could not read packet: {}", error.text);
}
continue;
}
}
}
});
// now send // now send
match options.send_type { match options.send_type {
DataType::TEXT => { DataType::TEXT => {
@ -172,43 +117,119 @@ pub fn start(options: SendOptions, verbose_output: bool) -> Result<(), Error> {
} }
DataType::FILE => { DataType::FILE => {
// // prepare file
// let chunked_file: fsys::file::ChunkedFile;
// match fsys::file::ChunkedFile::from(&options.source_path, handshake.chunk_size as u128) {
// Ok(f) => {
// chunked_file = f;
// }
} // Err(error) => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
DataType::DIR => { // return Err(
// Error::new(
// format!("error constructing a chunked file {}: {}", options.source_path.display(), error.text).as_str())
// );
// }
// }
} // // send fileinfo packet
} // let fileinfo_packet: packets::FileInfo;
// match packets::FileInfo::new(&chunked_file, 1, "".to_string()) {
// Ok(fp) => {
// fileinfo_packet = fp;
// }
// // handle incoming packets // Err(error) => {
// loop { // packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// let incoming_packet: Box<dyn Packet>; // return Err(
// match ch_recv.recv() { // Error::new(
// Ok(p) => { // format!("error constructing fileinfo packet for {}: {}", options.source_path.display(), error.text).as_str())
// incoming_packet = p; // );
// } // }
// }
// match send_packet(&mut connection, &fileinfo_packet.as_raw(), handshake.encryption_type, &handshake.encryption_key) {
// Ok(()) => {}
// Err(error) => { // Err(error) => {
// packets::close_connection(&mut connection); // packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(Error::new( // return Err(
// format!("error receiving a new packet from listener thread: {}", error).as_str() // Error::new(
// )); // format!("could not send fileinfo packet for {}: {}", options.source_path.display(), error.text).as_str())
// );
// } // }
// } // }
// match incoming_packet.get_type() { // // wait for acceptance or rejection
// PacketType::ConnectionShutdown => { // match read_next_packet(&mut connection, handshake.encryption_type, &handshake.encryption_key) {
// Ok(packet) => {
// match packet.header {
// specs::FILE_ACCEPT_PACKET_ID => {
// // proceed
// if verbose_output { // if verbose_output {
// println!("Connection has been shut down"); // println!("File has been accepted");
// }
// }
// specs::FILE_REJECT_PACKET_ID | _ => {
// // file not needed
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Ok(());
// }
// }
// }
// Err(error) => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(
// Error::new(
// format!("could not receive answer for fileinfo packet: {}", error.text).as_str())
// );
// }
// }
// println!("started to send chunks");
// // send the file in chunks !
// for chunk_no in 0..chunked_file.chunks_amount {
// // read next chunk
// let chunk_bytes: Vec<u8>;
// match chunked_file.read_chunk(chunk_no) {
// Ok(c) => {
// chunk_bytes = c;
// } // }
// packets::close_connection(&mut connection);
// break; // Err(error) => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(
// Error::new(format!("error reading chunk no {} from {}: {}", chunk_no, chunked_file.path.display(), error.text).as_str()),
// );
// }
// } // }
// _ => {} // // send it
// let filedata_packet: packets::FileData = packets::FileData::new(fileinfo_packet.file_id, chunk_no as u64, chunk_bytes);
// match send_packet(&mut connection, &filedata_packet.as_raw(), handshake.encryption_type, &handshake.encryption_key) {
// Ok(()) => {}
// Err(error) => {
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Err(
// Error::new(
// format!("could not send filedata packet for {}: {}", options.source_path.display(), error.text).as_str())
// );
// }
// } // }
// } // }
// // once the file has been received - close the connection
// packets::close_connection(&mut connection, handshake.encryption_type, &handshake.encryption_key);
// return Ok(());
}
DataType::DIR => {
}
}
return Ok(()); return Ok(());
} }

163
src/protocol/packets.rs
Unescape View File

@ -1,24 +1,9 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use std::net; use std::net;
use std::io::Write; use std::io::Write;
use std::io::Read; use std::io::Read;
use crate::util::error::Error; use crate::util::error::Error;
use crate::util::buf_read::{read_u128_slice_be, read_utf8_string_slice}; use crate::util::buf_read::{read_u128_slice_be, read_utf8_string_slice, read_u64_slice_be};
use crate::protocol::specs::*; use crate::protocol::specs::*;
use crate::fsys::file::ChunkedFile; use crate::fsys::file::ChunkedFile;
use crate::crypt; use crate::crypt;
@ -41,9 +26,9 @@ pub fn send_packet<W>(conn: &mut W, packet: &Packet, encr_type: u8, key: &Vec<u8
// get total length and add it to the beginning // get total length and add it to the beginning
let total_packet_len: u128 = packet_bytes.len() as u128; let total_packet_len: u64 = packet_bytes.len() as u64;
let mut transport_bytes: Vec<u8> = Vec::with_capacity((total_packet_len + 16) as usize); let mut transport_bytes: Vec<u8> = Vec::with_capacity((total_packet_len + 8) as usize);
transport_bytes.extend_from_slice(&total_packet_len.to_be_bytes()); transport_bytes.extend_from_slice(&total_packet_len.to_be_bytes());
transport_bytes.append(&mut packet_bytes); transport_bytes.append(&mut packet_bytes);
@ -61,9 +46,9 @@ pub fn send_packet<W>(conn: &mut W, packet: &Packet, encr_type: u8, key: &Vec<u8
pub fn read_next_packet<R>(conn: &mut R, encr_type: u8, key: &Vec<u8>) -> Result<Packet, Error> pub fn read_next_packet<R>(conn: &mut R, encr_type: u8, key: &Vec<u8>) -> Result<Packet, Error>
where R: Read { where R: Read {
let mut u128_buf: [u8; 16] = [0; 16]; let mut u64_buf: [u8; 8] = [0; 8];
loop { loop {
match conn.read_exact(&mut u128_buf) { match conn.read_exact(&mut u64_buf) {
Ok(()) => { Ok(()) => {
break; break;
} }
@ -83,7 +68,7 @@ pub fn read_next_packet<R>(conn: &mut R, encr_type: u8, key: &Vec<u8>) -> Result
} }
} }
let packet_len: u128 = u128::from_be_bytes(u128_buf); let packet_len: u64 = u64::from_be_bytes(u64_buf);
let mut packet_bytes: Vec<u8> = vec!(0; packet_len as usize); let mut packet_bytes: Vec<u8> = vec!(0; packet_len as usize);
match conn.read_exact(&mut packet_bytes) { match conn.read_exact(&mut packet_bytes) {
@ -139,7 +124,7 @@ impl Text {
contents: Vec::with_capacity(self.text.len()), contents: Vec::with_capacity(self.text.len()),
}; };
let text_length: u128 = self.text.len() as u128; let text_length: u64 = self.text.len() as u64;
raw_packet.contents.extend_from_slice(&text_length.to_be_bytes()); raw_packet.contents.extend_from_slice(&text_length.to_be_bytes());
raw_packet.contents.extend_from_slice(&self.text.as_bytes()); raw_packet.contents.extend_from_slice(&self.text.as_bytes());
@ -151,29 +136,29 @@ impl Text {
return Err(Error::new("it is not a text packet")); return Err(Error::new("it is not a text packet"));
} }
if raw_packet.contents.len() < 17 { if raw_packet.contents.len() < 9 {
return Err( return Err(
Error::new(format!("{} bytes is too small for a text packet to be valid", raw_packet.contents.len()).as_str() Error::new(format!("{} bytes is too small for a text packet to be valid", raw_packet.contents.len()).as_str()
)); ));
} }
// get text length // get text length
let text_length: u128 = read_u128_slice_be(&raw_packet.contents[0..16]); let text_length: u64 = read_u64_slice_be(&raw_packet.contents[0..8]);
if text_length as usize > raw_packet.contents[16..16+text_length as usize].len() { if text_length as usize > raw_packet.contents[8..8+text_length as usize].len() {
return Err( return Err(
Error::new( Error::new(
format!( format!(
"text length ({}) is bigger than provided packet bytes length ({})", "text length ({}) is bigger than provided packet bytes length ({})",
text_length, text_length,
raw_packet.contents[16..16+text_length as usize].len() raw_packet.contents[8..8+text_length as usize].len()
).as_str() ).as_str()
) )
); );
} }
// extract text // extract text
let packet_text = read_utf8_string_slice(&raw_packet.contents[16..16+text_length as usize]); let packet_text = read_utf8_string_slice(&raw_packet.contents[8..8+text_length as usize]);
return Ok( return Ok(
Text{ Text{
@ -185,7 +170,7 @@ impl Text {
pub struct FileInfo { pub struct FileInfo {
pub file_id: u128, pub file_id: u64,
pub filename: String, pub filename: String,
pub filesize: u128, pub filesize: u128,
pub relative_path: String, pub relative_path: String,
@ -201,7 +186,7 @@ impl FileInfo {
}; };
} }
pub fn new(file: &ChunkedFile, file_id: u128, rel_path: String) -> Result<FileInfo, Error> { pub fn new(file: &ChunkedFile, file_id: u64, rel_path: String) -> Result<FileInfo, Error> {
let mut new_fileinfo_packet: FileInfo = FileInfo::empty(); let mut new_fileinfo_packet: FileInfo = FileInfo::empty();
// id // id
@ -232,14 +217,18 @@ impl FileInfo {
new_fileinfo_packet.filesize = file.size; new_fileinfo_packet.filesize = file.size;
// rel path // rel path
if rel_path == "" {
new_fileinfo_packet.relative_path = new_fileinfo_packet.filename.clone();
} else {
new_fileinfo_packet.relative_path = rel_path; new_fileinfo_packet.relative_path = rel_path;
}
return Ok(new_fileinfo_packet); return Ok(new_fileinfo_packet);
} }
pub fn as_raw(&self) -> Packet { pub fn as_raw(&self) -> Packet {
let mut raw_packet: Packet = Packet{ let mut raw_packet: Packet = Packet{
header: TEXT_PACKET_ID, header: FILEINFO_PACKET_ID,
contents: Vec::<u8>::new(), contents: Vec::<u8>::new(),
}; };
@ -247,7 +236,7 @@ impl FileInfo {
raw_packet.contents.extend_from_slice(&self.file_id.to_be_bytes()); raw_packet.contents.extend_from_slice(&self.file_id.to_be_bytes());
// filename // filename
let filename_bytes_length: u128 = self.filename.len() as u128; let filename_bytes_length: u64 = self.filename.len() as u64;
raw_packet.contents.extend_from_slice(&filename_bytes_length.to_be_bytes()); raw_packet.contents.extend_from_slice(&filename_bytes_length.to_be_bytes());
raw_packet.contents.extend_from_slice(&self.filename.as_bytes()); raw_packet.contents.extend_from_slice(&self.filename.as_bytes());
@ -255,7 +244,7 @@ impl FileInfo {
raw_packet.contents.extend_from_slice(&self.filesize.to_be_bytes()); raw_packet.contents.extend_from_slice(&self.filesize.to_be_bytes());
// relative path // relative path
let relative_path_bytes_length: u128 = self.relative_path.len() as u128; let relative_path_bytes_length: u64 = self.relative_path.len() as u64;
raw_packet.contents.extend_from_slice(&relative_path_bytes_length.to_be_bytes()); raw_packet.contents.extend_from_slice(&relative_path_bytes_length.to_be_bytes());
raw_packet.contents.extend_from_slice(&self.relative_path.as_bytes()); raw_packet.contents.extend_from_slice(&self.relative_path.as_bytes());
@ -267,28 +256,28 @@ impl FileInfo {
return Err(Error::new("it is not a fileinfo packet")); return Err(Error::new("it is not a fileinfo packet"));
} }
if raw_packet.contents.len() < 16+16+16+16 { if raw_packet.contents.len() < 8+8+16+8 {
return Err( return Err(
Error::new(format!("{} bytes is too small for a fileinfo packet to be valid", raw_packet.contents.len()).as_str() Error::new(format!("{} bytes is too small for a fileinfo packet to be valid", raw_packet.contents.len()).as_str()
)); ));
} }
// file id // file id
let file_id = read_u128_slice_be(&raw_packet.contents[0..16]); let file_id = read_u64_slice_be(&raw_packet.contents[0..8]);
// get filename // get filename
let filename_length: u128 = read_u128_slice_be(&raw_packet.contents[16..32]); let filename_length: u64 = read_u64_slice_be(&raw_packet.contents[8..16]);
let filename = read_utf8_string_slice(&raw_packet.contents[32..32+filename_length as usize]); let filename = read_utf8_string_slice(&raw_packet.contents[16..16+filename_length as usize]);
// filesize // filesize
let filesize = read_u128_slice_be(&raw_packet.contents[32+filename_length as usize..32+16+filename_length as usize]); let filesize = read_u128_slice_be(&raw_packet.contents[16+filename_length as usize..16+16+filename_length as usize]);
// relative path // relative path
let rel_path_length: u128 = read_u128_slice_be( let rel_path_length: u64 = read_u64_slice_be(
&raw_packet.contents[32+16+filename_length as usize..32+16+16+filename_length as usize] &raw_packet.contents[32+filename_length as usize..32+8+filename_length as usize]
); );
let relative_path = read_utf8_string_slice( let relative_path = read_utf8_string_slice(
&raw_packet.contents[32+16+16+filename_length as usize..(filename_length+32+16+16+rel_path_length) as usize] &raw_packet.contents[32+8+filename_length as usize..(filename_length+32+8+rel_path_length) as usize]
); );
return Ok( return Ok(
@ -304,12 +293,20 @@ impl FileInfo {
pub struct FileData { pub struct FileData {
pub file_id: u128, pub file_id: u64,
pub chunk_no: u128, pub chunk_no: u64,
pub chunk: Vec<u8>, pub chunk: Vec<u8>,
} }
impl FileData { impl FileData {
pub fn new(file_id: u64, chunk_no: u64, chunk: Vec<u8>) -> FileData {
return FileData{
file_id: file_id,
chunk_no: chunk_no,
chunk: chunk,
};
}
pub fn as_raw(&self) -> Packet { pub fn as_raw(&self) -> Packet {
let mut raw_packet: Packet = Packet{ let mut raw_packet: Packet = Packet{
header: FILEDATA_PACKET_ID, header: FILEDATA_PACKET_ID,
@ -323,7 +320,7 @@ impl FileData {
raw_packet.contents.extend_from_slice(&self.chunk_no.to_be_bytes()); raw_packet.contents.extend_from_slice(&self.chunk_no.to_be_bytes());
// chunk // chunk
raw_packet.contents.extend_from_slice(&self.chunk.len().to_be_bytes()); raw_packet.contents.extend_from_slice(&(self.chunk.len() as u64).to_be_bytes());
raw_packet.contents.extend_from_slice(&self.chunk); raw_packet.contents.extend_from_slice(&self.chunk);
return raw_packet; return raw_packet;
@ -334,23 +331,23 @@ impl FileData {
return Err(Error::new("it is not a filedata packet")); return Err(Error::new("it is not a filedata packet"));
} }
if raw_packet.contents.len() < 16+16+16 { if raw_packet.contents.len() < 8+8+8 {
return Err( return Err(
Error::new(format!("{} bytes is too small for a fileinfo packet to be valid", raw_packet.contents.len()).as_str() Error::new(format!("{} bytes is too small for a fileinfo packet to be valid", raw_packet.contents.len()).as_str()
)); ));
} }
// file id // file id
let file_id = read_u128_slice_be(&raw_packet.contents[0..16]); let file_id = read_u64_slice_be(&raw_packet.contents[0..8]);
// chunk number // chunk number
let chunk_no = read_u128_slice_be(&raw_packet.contents[16..32]); let chunk_no = read_u64_slice_be(&raw_packet.contents[8..16]);
// chunk bytes // chunk bytes
let chunk_length = read_u128_slice_be(&raw_packet.contents[32..48]); let chunk_length = read_u64_slice_be(&raw_packet.contents[16..24]);
let mut chunk: Vec<u8> = Vec::with_capacity(chunk_length as usize); let mut chunk: Vec<u8> = vec!(0; chunk_length as usize);
for i in 48..(48+chunk_length) as usize { for i in 24..(24+chunk_length) as usize {
chunk[i-48] = raw_packet.contents[i].to_be(); chunk[i-24] = raw_packet.contents[i].to_be();
} }
return Ok( return Ok(
@ -393,6 +390,7 @@ impl ConnectionShutdown {
#[derive(Clone, Debug)] #[derive(Clone, Debug)]
pub struct Handshake { pub struct Handshake {
pub protocol_version: u8, pub protocol_version: u8,
pub chunk_size: u64,
pub encryption_type: u8, pub encryption_type: u8,
pub encryption_key: Vec<u8>, pub encryption_key: Vec<u8>,
} }
@ -407,11 +405,14 @@ impl Handshake {
// protocol version // protocol version
raw_packet.contents.extend_from_slice(&PROTOCOL_LATEST_VERSION.to_be_bytes()); raw_packet.contents.extend_from_slice(&PROTOCOL_LATEST_VERSION.to_be_bytes());
// chunk_size
raw_packet.contents.extend_from_slice(&u64::from_be_bytes(CHUNK_SIZE.to_be_bytes()).to_be_bytes());
// encryption type // encryption type
raw_packet.contents.extend_from_slice(&self.encryption_type.to_be_bytes()); raw_packet.contents.extend_from_slice(&self.encryption_type.to_be_bytes());
// encryption key // encryption key
raw_packet.contents.extend_from_slice(&(self.encryption_key.len() as u128).to_be_bytes()); raw_packet.contents.extend_from_slice(&(self.encryption_key.len() as u64).to_be_bytes());
raw_packet.contents.extend_from_slice(&self.encryption_key); raw_packet.contents.extend_from_slice(&self.encryption_key);
return raw_packet; return raw_packet;
@ -422,7 +423,7 @@ impl Handshake {
return Err(Error::new("it is not a handshake packet")); return Err(Error::new("it is not a handshake packet"));
} }
if raw_packet.contents.len() < 1+1+16 { if raw_packet.contents.len() < 1+1+8+8 {
return Err( return Err(
Error::new(format!("{} bytes is too small for a handshake packet to be valid", raw_packet.contents.len()).as_str()) Error::new(format!("{} bytes is too small for a handshake packet to be valid", raw_packet.contents.len()).as_str())
); );
@ -431,11 +432,14 @@ impl Handshake {
// protocol version // protocol version
let protocol_version = raw_packet.contents[0].to_be(); let protocol_version = raw_packet.contents[0].to_be();
// chunk size
let chunk_size = read_u64_slice_be(&raw_packet.contents[1..9]);
// encryption type // encryption type
let encryption_type = raw_packet.contents[1].to_be(); let encryption_type = raw_packet.contents[9].to_be();
// key // key
let key_len: u128 = read_u128_slice_be(&raw_packet.contents[2..18]); let key_len: u64 = read_u64_slice_be(&raw_packet.contents[10..18]);
let mut encryption_key: Vec<u8> = vec!(0; key_len as usize); let mut encryption_key: Vec<u8> = vec!(0; key_len as usize);
if key_len == 0 { if key_len == 0 {
encryption_key = Vec::new(); encryption_key = Vec::new();
@ -448,6 +452,7 @@ impl Handshake {
return Ok( return Ok(
Handshake{ Handshake{
protocol_version: protocol_version, protocol_version: protocol_version,
chunk_size: chunk_size,
encryption_type: encryption_type, encryption_type: encryption_type,
encryption_key: encryption_key, encryption_key: encryption_key,
} }
@ -479,3 +484,53 @@ impl HandshakeAccept {
} }
} }
} }
pub struct FileAccept {}
impl FileAccept {
pub fn as_raw(&self) -> Packet {
return Packet{
header: FILE_ACCEPT_PACKET_ID,
contents: Vec::new(),
}
}
pub fn from_raw(raw_packet: &Packet) -> Result<FileAccept, Error> {
match raw_packet.header {
FILE_ACCEPT_PACKET_ID => {
return Ok(FileAccept{})
}
_ => {
return Err(
Error::new("this is not a file accept packet"),
);
}
}
}
}
pub struct FileReject {}
impl FileReject {
pub fn as_raw(&self) -> Packet {
return Packet{
header: FILE_REJECT_PACKET_ID,
contents: Vec::new(),
}
}
pub fn from_raw(raw_packet: &Packet) -> Result<FileReject, Error> {
match raw_packet.header {
FILE_ACCEPT_PACKET_ID => {
return Ok(FileReject{})
}
_ => {
return Err(
Error::new("this is not a file reject packet"),
);
}
}
}
}

17
src/protocol/specs.rs
Unescape View File

@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
// Versioning // Versioning
pub const PROTOCOL_VERSION_1: u8 = 1; pub const PROTOCOL_VERSION_1: u8 = 1;
pub const PROTOCOL_LATEST_VERSION: u8 = PROTOCOL_VERSION_1; pub const PROTOCOL_LATEST_VERSION: u8 = PROTOCOL_VERSION_1;
@ -38,8 +23,6 @@ pub const ECRYPTION_XOR: u8 = 1;
pub enum RunMode { pub enum RunMode {
SEND, SEND,
RECEIVE, RECEIVE,
SYNC,
DAEMON,
} }
#[derive(Debug)] #[derive(Debug)]

23
src/util/buf_read.rs
Unescape View File

@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
pub fn read_u128_slice_be(buf_16: &[u8]) -> u128 { pub fn read_u128_slice_be(buf_16: &[u8]) -> u128 {
let mut arr: [u8; 16] = [0; 16]; let mut arr: [u8; 16] = [0; 16];
for i in 0..16 { for i in 0..16 {
@ -24,3 +9,11 @@ pub fn read_u128_slice_be(buf_16: &[u8]) -> u128 {
pub fn read_utf8_string_slice(buf: &[u8]) -> String { pub fn read_utf8_string_slice(buf: &[u8]) -> String {
return String::from_utf8_lossy(&buf).into_owned(); return String::from_utf8_lossy(&buf).into_owned();
} }
pub fn read_u64_slice_be(buf_8: &[u8]) -> u64 {
let mut arr: [u8; 8] = [0; 8];
for i in 0..8 {
arr[i] = buf_8[i];
}
return u64::from_be_bytes(arr);
}

15
src/util/error.rs
Unescape View File

@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
pub struct Error { pub struct Error {
pub text: String, pub text: String,
} }

15
src/util/local_ip.rs
Unescape View File

@ -1,18 +1,3 @@
/*
ddtu - digital data transferring utility
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
*/
use std::net; use std::net;
use crate::util::error::Error; use crate::util::error::Error;

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