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Author SHA1 Message Date
0235de2896 rest of previous commit 2025-07-27 20:50:33 +02:00
49e3aa1a3a implement get method 2025-07-27 20:49:43 +02:00
e17ded8db0 finish register request 2025-07-27 15:36:20 +02:00
e1d5a34e82 first addition ś of aes 2025-07-26 21:28:03 +02:00
3bcccc7620 addtions to REGISTER request 2025-07-26 15:03:53 +02:00
11 changed files with 1200 additions and 80 deletions

589
Cargo.lock generated
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2f0a0651a5c2bc21487bde11ee802ccaf4c51935d0d3d42a6101f98161700bc6"
dependencies = [
"bumpalo",
"log",
"proc-macro2",
"quote",
"syn",
"wasm-bindgen-shared",
]
[[package]]
name = "wasm-bindgen-macro"
version = "0.2.100"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7fe63fc6d09ed3792bd0897b314f53de8e16568c2b3f7982f468c0bf9bd0b407"
dependencies = [
"quote",
"wasm-bindgen-macro-support",
]
[[package]]
name = "wasm-bindgen-macro-support"
version = "0.2.100"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
dependencies = [
"proc-macro2",
"quote",
"syn",
"wasm-bindgen-backend",
"wasm-bindgen-shared",
]
[[package]]
name = "wasm-bindgen-shared"
version = "0.2.100"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1a05d73b933a847d6cccdda8f838a22ff101ad9bf93e33684f39c1f5f0eece3d"
dependencies = [
"unicode-ident",
]
[[package]]
name = "windows-core"
version = "0.61.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c0fdd3ddb90610c7638aa2b3a3ab2904fb9e5cdbecc643ddb3647212781c4ae3"
dependencies = [
"windows-implement",
"windows-interface",
"windows-link",
"windows-result",
"windows-strings",
]
[[package]]
name = "windows-implement"
version = "0.60.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a47fddd13af08290e67f4acabf4b459f647552718f683a7b415d290ac744a836"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "windows-interface"
version = "0.59.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bd9211b69f8dcdfa817bfd14bf1c97c9188afa36f4750130fcdf3f400eca9fa8"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "windows-link"
version = "0.1.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5e6ad25900d524eaabdbbb96d20b4311e1e7ae1699af4fb28c17ae66c80d798a"
[[package]]
name = "windows-result"
version = "0.3.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "56f42bd332cc6c8eac5af113fc0c1fd6a8fd2aa08a0119358686e5160d0586c6"
dependencies = [
"windows-link",
]
[[package]]
name = "windows-strings"
version = "0.4.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "56e6c93f3a0c3b36176cb1327a4958a0353d5d166c2a35cb268ace15e91d3b57"
dependencies = [
"windows-link",
]
[[package]]
name = "windows-sys"
@ -719,6 +1271,15 @@ version = "0.53.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
[[package]]
name = "wit-bindgen-rt"
version = "0.39.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
dependencies = [
"bitflags",
]
[[package]]
name = "zerocopy"
version = "0.8.26"

View File

@ -13,7 +13,17 @@ path = "src/client/main.rs"
[dependencies]
aes = "0.8.4"
cbc = "0.1.2"
chrono = "0.4.41"
cipher = { version = "0.4.4", features = ["block-padding", "alloc"] }
clap = { version = "4.5.41", features = ["derive"] }
rand = "0.8.5"
hmac = "0.12.1"
orx-concurrent-vec = "3.6.0"
pbkdf2 = "0.12.2"
rand = "0.9.2"
rayon = "1.10.0"
readonly = "0.2.13"
sha2 = "0.10.9"
smol = "2.0.2"
tappers = "0.4.2"

View File

@ -1,7 +1,9 @@
use pea_2_pea::SERVER_PORT;
mod net;
use pea_2_pea::*;
use rand::RngCore;
use std::{
io::{ErrorKind, Read, Write},
io::{Error, ErrorKind, Read, Write},
net::UdpSocket,
process::exit,
time::Duration,
@ -15,82 +17,66 @@ struct Cli {
#[arg(help = "registrar ip address or hostname")]
registrar: String,
#[arg(short = 'p', long = "registrar-port")]
#[arg(help = format!("optional Port number for the registrar service (1-65535) Default: {}", SERVER_PORT))]
registrar_port: Option<u16>,
#[arg(short = 'n', long = "network-id")]
#[arg(help = "your virtual network id that allows other people to connect to you")]
network_id: String,
#[arg(short = 'P', long = "password")]
#[arg(
help = "encryption password for your virtual network if not provided transmitions will be unencrypted"
)]
password: Option<String>,
#[arg(short = 'v', long = "verbose")]
verbose: bool,
#[arg(short = 'V', long = "version")]
version: bool,
#[arg(short = 'p', long = "registrar-port")]
#[arg(help = format!("Port number for the registrar service (1-65535) Default: {}", SERVER_PORT))]
registrar_port: Option<u16>,
#[arg(short = 'P', long = "bind-port")]
bind_port: Option<u16>,
}
fn main() -> std::io::Result<()> {
let cli = <Cli as clap::Parser>::parse();
if cli.network_id.len() > 0xff {
eprintln!("network id cannot have more then 255 charactes");
exit(7); // posix for E2BIG
}
{
let socket: UdpSocket = (|| -> std::io::Result<UdpSocket> {
let mut port: u16;
match cli.bind_port {
Some(port_proveded) => port = port_proveded,
None => port = 59999, // Magic number
}
loop {
port += 1;
match UdpSocket::bind(format!("0.0.0.0:{}", port)) {
Ok(socket) => return Ok(socket),
Err(_) => continue, // Retry on error
}
match UdpSocket::bind("0.0.0.0:0") {
// bind to OS assigned random port
Ok(socket) => return Ok(socket),
Err(e) => Err(e), // exit on error
}
})()
.expect("Failed to bind to any available port");
socket.set_read_timeout(Some(Duration::new(10, 0)))?; // set timeout to 10 seconds
// send query request to get server public key
let server_port: u16 = (|| -> u16 {
match cli.bind_port {
match cli.registrar_port {
Some(port_proveded) => return port_proveded,
None => return pea_2_pea::SERVER_PORT,
None => return SERVER_PORT,
}
})();
#[allow(non_snake_case)] // i think this is valid snake case but rustc doesnt think so
let server_SocketAddr: core::net::SocketAddr = format!("{}:{}", cli.registrar, server_port)
.parse()
.unwrap();
{
let mut query_byte: [u8; 1] = [0; 1];
query_byte[0] = pea_2_pea::ServerMethods::QUERY as u8;
match socket.send_to(&query_byte, &server_SocketAddr) {
Ok(s) => {
#[cfg(debug_assertions)]
eprintln!("send {} bytes", s);
}
Err(e) => {
eprintln!("Error snding data: {}", e);
}
}
}
let mut buf: [u8; BUFFER_SIZE] = [0; BUFFER_SIZE];
// query here
let mut data_lenght: usize = net::query_request(&mut buf, &server_SocketAddr, socket)?;
let mut buf: [u8; pea_2_pea::BUFFER_SIZE] = [0; pea_2_pea::BUFFER_SIZE];
loop {
match socket.recv_from(&mut buf) {
Ok((data_length, src)) => {}
Err(e) if e.kind() == ErrorKind::WouldBlock || e.kind() == ErrorKind::TimedOut => {
// timedout
continue;
}
Err(e) => {
eprintln!("Error receiving data: {}", e);
std::process::exit(-4);
}
}
break;
}
let mut public_sock_addr: Vec<u8> = buf[1..data_lenght].to_vec();
// register network
let mut salt: Option<[u8; SALT_AND_IV_SIZE as usize]>;
}
Ok(())
}

144
src/client/net.rs Normal file
View File

@ -0,0 +1,144 @@
use std::{
io::ErrorKind,
net::{SocketAddr, UdpSocket},
};
use pea_2_pea::*;
use rand::RngCore;
// return data_lenght and number of retryes
pub fn send_and_recv_with_retry(
buf: &mut [u8; BUFFER_SIZE],
dst: &SocketAddr,
socket: UdpSocket,
retry_max: usize,
) -> Result<(usize, usize), ServerErrorResponses> {
let mut send_buf = *buf;
let mut retry_count: usize = 0;
loop {
match socket.send_to(&mut send_buf, dst) {
Ok(s) => {
#[cfg(debug_assertions)]
eprintln!("send {} bytes", s);
}
Err(e) => {
panic!("Error sending data: {}", e);
}
}
match socket.recv_from(buf) {
Ok((data_lenght, src)) => {
if src != *dst {
continue;
}
match buf[0] {
x if x == send_buf[0] as u8 => {
return Ok((data_lenght, retry_count));
}
x if x == ServerResponse::GENERAL_ERROR as u8 => {
return Err(ServerErrorResponses::IO(std::io::Error::new(
std::io::ErrorKind::InvalidData,
match std::str::from_utf8(&buf[1..data_lenght]) {
// the firts byte is compensated for sice this is len not index
Ok(s) => s.to_string(),
Err(e) => format!("invalid error string: {}", e).to_string(),
},
)));
}
x if x == ServerResponse::ID_DOESNT_EXIST as u8 => {
return Err(ServerErrorResponses::ID_DOESNT_EXIST);
}
x if x == ServerResponse::ID_EXISTS as u8 => {
return Err(ServerErrorResponses::ID_EXISTS);
}
_ => {
continue;
}
}
}
Err(e) if e.kind() == ErrorKind::WouldBlock || e.kind() == ErrorKind::TimedOut => {
// timedout
if retry_count >= retry_max {
return Err(ServerErrorResponses::IO(std::io::Error::new(
ErrorKind::TimedOut,
"max retry count reached without responce",
)));
}
retry_count += 1;
continue;
}
Err(e) => {
return Err(ServerErrorResponses::IO(e));
}
}
}
}
pub fn query_request(
buf: &mut [u8; BUFFER_SIZE],
dst: &SocketAddr,
socket: UdpSocket,
) -> Result<usize, ServerErrorResponses> {
match send_and_recv_with_retry(buf, dst, socket, STANDARD_RETRY_MAX) {
Ok((data_lenght, _)) => return Ok(data_lenght),
Err(e) => return Err(e),
}
}
pub fn register_request(
buf: &mut [u8; BUFFER_SIZE],
dst: &SocketAddr,
socket: UdpSocket,
encryption_key: Option<[u8; 32]>,
salt_opt: Option<[u8; SALT_AND_IV_SIZE as usize]>,
mut public_sock_addr: Vec<u8>,
network_id: String,
) -> Result<usize, ServerErrorResponses> {
buf[0] = ServerMethods::REGISTER as u8; // set metod identification byte
buf[RegisterRequestDataPositions::ENCRYPTED as usize] = match encryption_key {
// stor encryption flag byte
Some(_) => true as u8,
None => false as u8,
};
buf[RegisterRequestDataPositions::ID_LEN as usize] = network_id.len() as u8;
buf[RegisterRequestDataPositions::DATA as usize
..RegisterRequestDataPositions::DATA as usize + network_id.len()]
.copy_from_slice(network_id.as_bytes()); // store network id
let mut iv: [u8; SALT_AND_IV_SIZE as usize] = [0; SALT_AND_IV_SIZE as usize];
let salt: [u8; SALT_AND_IV_SIZE as usize];
match salt_opt {
Some(s) => salt = s,
None => salt = [0; SALT_AND_IV_SIZE as usize],
}
match encryption_key {
Some(encryption_key) => {
let mut rng = rand::rng();
rng.fill_bytes(&mut iv);
public_sock_addr =
shared::crypto::encrypt(&encryption_key, &iv, public_sock_addr.as_slice()).unwrap();
}
None => {
iv = [0; SALT_AND_IV_SIZE as usize];
}
};
buf[RegisterRequestDataPositions::IV as usize
..RegisterRequestDataPositions::IV as usize + SALT_AND_IV_SIZE as usize]
.copy_from_slice(&iv); // copy iv ad salt do the request
buf[RegisterRequestDataPositions::SALT as usize
..RegisterRequestDataPositions::SALT as usize + SALT_AND_IV_SIZE as usize]
.copy_from_slice(&salt);
buf[RegisterRequestDataPositions::SOCKADDR_LEN as usize] = public_sock_addr.len() as u8;
buf[RegisterRequestDataPositions::DATA as usize + network_id.len()
..RegisterRequestDataPositions::DATA as usize + network_id.len() + public_sock_addr.len()]
.copy_from_slice(&public_sock_addr);
match send_and_recv_with_retry(buf, dst, socket, STANDARD_RETRY_MAX) {
Ok((data_lenght, _)) => return Ok(data_lenght),
Err(e) => return Err(e),
}
}

View File

@ -1,15 +1,78 @@
use core::fmt;
pub const SERVER_PORT: u16 = 3543;
pub const BUFFER_SIZE: usize = 65535;
pub const DEFAULT_TIMEOUT: u64 = 30;
pub const VERSION: &str = "v0.1";
pub const RSA_SIZE: usize = 2048;
pub const SALT_AND_IV_SIZE: u8 = 16;
pub const STANDARD_RETRY_MAX: usize = 10;
#[repr(u8)]
pub enum ServerMethods {
QUERY = 0,
QUERY = 0, // return IP and port of the client
REGISTER = 1,
GET = 2,
HEARTBEAT = 3,
}
#[allow(non_camel_case_types)]
pub enum ServerResponse {
GENERAL_ERROR = 255,
ID_EXISTS = 254,
ID_DOESNT_EXIST = 253, // both error since sometimes it is the problem that the id exist and somethimes problem is that is doesn't
}
#[allow(non_camel_case_types)]
#[derive(Debug)]
pub enum ServerErrorResponses {
GENERAL_ERROR(String),
ID_EXISTS,
ID_DOESNT_EXIST,
IO(std::io::Error), // IO errors wraper
}
impl fmt::Display for ServerErrorResponses {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
ServerErrorResponses::GENERAL_ERROR(msg) => write!(f, "General error: {}", msg),
ServerErrorResponses::ID_EXISTS => write!(f, "ID is already registered"),
ServerErrorResponses::ID_DOESNT_EXIST => write!(f, "ID isn't yet registered"),
ServerErrorResponses::IO(err) => write!(f, "IO error: {}", err),
}
}
}
impl std::error::Error for ServerErrorResponses {}
impl From<std::io::Error> for ServerErrorResponses {
fn from(error: std::io::Error) -> Self {
ServerErrorResponses::IO(error)
}
}
impl ServerErrorResponses {
pub fn into_io_error(self) -> std::io::Error {
match self {
ServerErrorResponses::IO(io_err) => io_err,
other => std::io::Error::new(std::io::ErrorKind::Other, other),
}
}
}
#[allow(non_camel_case_types)]
pub enum RegisterRequestDataPositions {
ENCRYPTED = 1, // this feeld should be 0 if not encrypted
ID_LEN = 2,
SOCKADDR_LEN = 3,
SALT = 4,
IV = (SALT_AND_IV_SIZE + RegisterRequestDataPositions::SALT as u8) as isize,
DATA = (SALT_AND_IV_SIZE + RegisterRequestDataPositions::IV as u8) as isize, // after this there will be id and sockaddr in string or encrypted form after
}
#[allow(non_camel_case_types)]
pub enum GetResponseDataPositions {
ENCRYPTED = 1, // this feeld should be 0 if not encrypted
ID_LEN = 2,
NUM_OF_CLIENTS = 3,
SALT = 4,
CLIENTS = (SALT_AND_IV_SIZE + RegisterRequestDataPositions::SALT as u8) as isize,
// after this there will be blocks of this sturcture: one byte size of sockaddr than there will be IV that is SALT_AND_IV_SIZE long and after that there will be sockaddr this repeats until the end of packet
}
pub mod shared;

View File

@ -1,6 +1,13 @@
mod net;
use std::{net::UdpSocket, process::exit, sync::Arc};
mod types;
mod utils;
use std::{
net::UdpSocket,
process::exit,
sync::{Arc, RwLock},
};
use orx_concurrent_vec::ConcurrentVec;
fn main() -> std::io::Result<()> {
{
let socket: Arc<UdpSocket> = Arc::new(
@ -14,13 +21,22 @@ fn main() -> std::io::Result<()> {
.expect("Failed to bind to any available port"),
);
let registration_vector: Arc<ConcurrentVec<types::Registration>> =
Arc::new(orx_concurrent_vec::ConcurrentVec::new());
let mut buf: [u8; pea_2_pea::BUFFER_SIZE] = [0; pea_2_pea::BUFFER_SIZE];
smol::block_on(async {
loop {
match socket.recv_from(&mut buf) {
Ok((data_length, src)) => {
smol::spawn(net::handle_request(buf, socket.clone(), src, data_length))
.detach();
smol::spawn(net::handle_request(
buf,
socket.clone(),
src,
data_length,
registration_vector.clone(),
))
.detach();
}
Err(e) => {
eprintln!("Error receiving data: {}", e);

View File

@ -1,19 +1,28 @@
use crate::utils::send_general_error_to_client;
use super::types;
use super::utils;
use orx_concurrent_vec::ConcurrentVec;
use pea_2_pea::*;
use rayon::prelude::*;
use std::sync::Arc;
use std::u8;
pub async fn handle_request(
buf: [u8; pea_2_pea::BUFFER_SIZE],
buf: [u8; BUFFER_SIZE],
socket: std::sync::Arc<std::net::UdpSocket>,
src: core::net::SocketAddr,
data_len: usize,
registration_vector: Arc<ConcurrentVec<types::Registration>>,
) {
let mut rng: rand::prelude::ThreadRng = rand::thread_rng();
match buf[0] {
x if x == pea_2_pea::ServerMethods::QUERY as u8 => {
x if x == ServerMethods::QUERY as u8 => {
#[cfg(debug_assertions)]
eprintln!("QUERY method");
let client_sock_addr_str: String = src.to_string();
let mut send_vec: Vec<u8> = client_sock_addr_str.into();
send_vec.insert(0, pea_2_pea::ServerMethods::QUERY as u8);
send_vec.insert(0, ServerMethods::QUERY as u8);
match socket.send_to(&send_vec, &src) {
Ok(s) => {
@ -26,15 +35,182 @@ pub async fn handle_request(
}
}
x if x == pea_2_pea::ServerMethods::GET as u8 => {
x if x == ServerMethods::GET as u8 => {
#[cfg(debug_assertions)]
println!("GET method");
if data_len > u8::MAX as usize + 1 {
send_general_error_to_client(
src,
std::io::Error::new(std::io::ErrorKind::InvalidData, "Network ID is too long"),
socket,
);
return; // drop packet if id lenght is biger than posible
}
let net_id: String = match std::str::from_utf8(&buf[1..]) {
Ok(s) => s.to_string(),
Err(e) => {
eprint!("id to utf-8 failed: {}", e);
utils::send_general_error_to_client(src, e, socket);
return;
}
};
let registration = match registration_vector
.iter()
.find(|elem| elem.map(|s| &s.net_id == &net_id)) // find if id exists
{
Some(registration) => registration,
None => {let _ = socket.send_to(&[ServerResponse::ID_DOESNT_EXIST as u8], src);
return;
},
}
.cloned();
let mut send_vec: Vec<u8> = Vec::with_capacity(
GetResponseDataPositions::SALT as usize + /*2 times one for SALT and other for first IV*/ 2*SALT_AND_IV_SIZE as usize + 20, /*magic number guess for how long is encrypted residencial ipv4 with port long */
); // use vector to handle many clients
// lets start serializing
send_vec.push(registration.encrypted as u8);
send_vec.push(registration.net_id.len() as u8);
send_vec.push(registration.clients.len() as u8);
// todo!("make sure it allows only 255 client per network max");
send_vec.extend_from_slice(&registration.salt);
registration.clients.iter().for_each(|client| {
let sock_addr_len: u8 = client.client_sock_addr.len() as u8;
send_vec.push(sock_addr_len);
send_vec.extend_from_slice(&client.iv);
send_vec.extend_from_slice(&client.client_sock_addr);
});
if (send_vec.len() > BUFFER_SIZE) {
send_general_error_to_client(
src,
std::io::Error::new(
std::io::ErrorKind::FileTooLarge,
format!(
"Max number of clients reached count: {}",
registration.clients.len()
),
),
socket,
);
return;
}
match socket.send_to(&send_vec, &src) {
Ok(s) => {
#[cfg(debug_assertions)]
eprintln!("send {} bytes", s);
}
Err(e) => {
eprintln!("Error snding data: {}", e);
}
}
}
x if x == pea_2_pea::ServerMethods::REGISTER as u8 => {
x if x == ServerMethods::REGISTER as u8 => {
#[cfg(debug_assertions)]
println!("REGISTER method");
let encrypted: bool = buf[RegisterRequestDataPositions::ENCRYPTED as usize] != 0;
//read lenght of sockaddr
// rustc be like RUST HAS NO TERNARY OPERATON USE if-else
let len_id: u8 = if buf[RegisterRequestDataPositions::ID_LEN as usize] != 0 {
buf[RegisterRequestDataPositions::ID_LEN as usize]
} else {
return;
};
let sock_addr_len: u8 = if buf[RegisterRequestDataPositions::SOCKADDR_LEN as usize] != 0
{
buf[RegisterRequestDataPositions::SOCKADDR_LEN as usize]
} else {
return;
};
let net_id: String = match std::str::from_utf8(
&buf[(RegisterRequestDataPositions::DATA as usize)
..(len_id as usize) + (RegisterRequestDataPositions::DATA as usize)],
) {
Ok(s) => s.to_string(),
Err(e) => {
eprint!("id to utf-8 failed: {}", e);
utils::send_general_error_to_client(src, e, socket);
return;
}
};
match registration_vector
.iter()
.find(|elem| elem.map(|s| &s.net_id == &net_id)) // find if id exists
{
Some(_) => {
match socket.send_to(&[ServerResponse::ID_EXISTS as u8], src) {
Ok(s) => {
#[cfg(debug_assertions)]
eprintln!("send {} bytes", s);
}
Err(e) => {
eprintln!("Error sending data: {}", e);
}
};
return;
}
None => {}
}
let salt: Option<[u8; SALT_AND_IV_SIZE as usize]>;
let iv: Option<[u8; SALT_AND_IV_SIZE as usize]>;
if encrypted {
salt = Some(
buf[(RegisterRequestDataPositions::SALT as usize)
..(RegisterRequestDataPositions::SALT as usize)
+ (SALT_AND_IV_SIZE as usize)]
.try_into()
.expect("this should never happen"),
);
iv = Some(
buf[(RegisterRequestDataPositions::IV as usize)
..(RegisterRequestDataPositions::IV as usize)
+ (SALT_AND_IV_SIZE as usize)]
.try_into()
.expect("this should never happen"),
)
} else {
salt = None;
iv = None;
}
registration_vector.push(types::Registration::new(
net_id,
buf[(RegisterRequestDataPositions::DATA as usize)
..(RegisterRequestDataPositions::DATA as usize) + (sock_addr_len as usize)]
.to_vec(),
encrypted,
chrono::Utc::now().timestamp(),
salt,
iv,
));
match socket.send_to(&[ServerMethods::REGISTER as u8], src) {
Ok(s) => {
#[cfg(debug_assertions)]
eprintln!("send {} bytes", s);
}
Err(e) => {
eprintln!("Error sending data: {}", e);
}
}
#[cfg(debug_assertions)]
println!("network registered");
}
x if x == pea_2_pea::ServerMethods::HEARTBEAT as u8 => {
x if x == ServerMethods::HEARTBEAT as u8 => {
#[cfg(debug_assertions)]
println!("HEARTBEAT method");
}

118
src/server/types.rs Normal file
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@ -0,0 +1,118 @@
use pea_2_pea::*;
use std::sync::{Arc, atomic::Ordering};
#[derive(Clone)]
#[readonly::make]
pub struct Client {
#[readonly]
pub client_sock_addr: Vec<u8>,
pub last_heart_beat: i64,
#[readonly]
pub iv: [u8; SALT_AND_IV_SIZE as usize],
}
impl Client {
pub fn new(client_addr: Vec<u8>, heart_beat: i64, iv: [u8; SALT_AND_IV_SIZE as usize]) -> Self {
Client {
client_sock_addr: client_addr,
last_heart_beat: heart_beat,
iv,
}
}
}
#[derive(Clone)]
#[readonly::make]
pub struct Registration {
#[readonly]
pub net_id: String,
#[readonly]
pub clients: Vec<Client>,
pub last_heart_beat: i64,
#[readonly]
pub encrypted: bool,
#[readonly]
pub salt: [u8; SALT_AND_IV_SIZE as usize],
}
impl Registration {
pub fn new(
net_id: String,
client_addr: Vec<u8>,
encrypted: bool,
heart_beat: i64,
salt: Option<[u8; SALT_AND_IV_SIZE as usize]>,
iv: Option<[u8; SALT_AND_IV_SIZE as usize]>,
) -> Self {
Registration {
net_id,
clients: vec![Client::new(
client_addr,
heart_beat,
iv.unwrap_or([0; SALT_AND_IV_SIZE as usize]),
)],
encrypted,
last_heart_beat: heart_beat,
salt: salt.unwrap_or([0; SALT_AND_IV_SIZE as usize]),
}
}
}
pub struct BatchLock {
inner: std::sync::Mutex<bool>, // true = blocking new locks
condvar: std::sync::Condvar,
active_count: std::sync::atomic::AtomicUsize,
}
pub struct LockGuard {
lock: Arc<BatchLock>,
}
impl BatchLock {
pub fn new() -> Arc<Self> {
Arc::new(BatchLock {
inner: std::sync::Mutex::new(false),
condvar: std::sync::Condvar::new(),
active_count: std::sync::atomic::AtomicUsize::new(0),
})
}
// Acquire a lock (blocks if waiting for all to unlock)
pub fn lock(self: &Arc<Self>) -> LockGuard {
let mut blocking = self.inner.lock().unwrap();
// Wait while new locks are blocked
while *blocking {
blocking = self.condvar.wait(blocking).unwrap();
}
self.active_count.fetch_add(1, Ordering::SeqCst);
LockGuard {
lock: Arc::clone(self),
}
}
// Block new locks and wait for all current locks to finish
pub fn wait_all_unlock(self: &Arc<Self>) {
// Block new locks
*self.inner.lock().unwrap() = true;
// Wait for all active locks to finish
while self.active_count.load(Ordering::SeqCst) > 0 {
std::thread::sleep(std::time::Duration::from_millis(1));
}
// Allow new locks again
*self.inner.lock().unwrap() = false;
self.condvar.notify_all();
}
}
impl Drop for LockGuard {
fn drop(&mut self) {
// Automatically release lock when guard is dropped
self.lock.active_count.fetch_sub(1, Ordering::SeqCst);
}
}

13
src/server/utils.rs Normal file
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use pea_2_pea::*;
pub fn send_general_error_to_client<T: std::error::Error>(
dst: core::net::SocketAddr,
e: T,
socket: std::sync::Arc<std::net::UdpSocket>,
) {
let mut resp_buf: Box<[u8]> = vec![0; e.to_string().len() + 1].into_boxed_slice();
resp_buf[0] = ServerResponse::GENERAL_ERROR as u8; // set 1st byte to ERROR
resp_buf[1..1 + e.to_string().len()].copy_from_slice(e.to_string().as_bytes()); // send error text to client
let _ = socket.send_to(&[ServerResponse::GENERAL_ERROR as u8], dst);
}

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@ -1 +1,34 @@
use aes::Aes256;
use cbc::cipher::{BlockDecryptMut, BlockEncryptMut, KeyIvInit, block_padding::Pkcs7};
use cbc::{Decryptor, Encryptor};
use hmac::Hmac;
use pbkdf2::pbkdf2;
use sha2::Sha256;
// they are used
#[allow(dead_code)]
type Aes256CbcEnc = Encryptor<Aes256>;
#[allow(dead_code)]
type Aes256CbcDec = Decryptor<Aes256>;
pub fn derive_key_from_password(password: &[u8], salt: &[u8]) -> [u8; 32] {
let mut key = [0u8; 32];
let _ = pbkdf2::<Hmac<Sha256>>(password, salt, 10000, &mut key);
key
}
/// Encrypt using AES-256-CBC
pub fn encrypt(key: &[u8], iv: &[u8], data: &[u8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
let cipher = Aes256CbcEnc::new_from_slices(key, iv)?;
Ok(cipher.encrypt_padded_vec_mut::<Pkcs7>(data))
}
/// Decrypt using AES-256-CBC
pub fn decrypt(
key: &[u8],
iv: &[u8],
ciphertext: &[u8],
) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
let cipher = Aes256CbcDec::new_from_slices(key, iv)?;
Ok(cipher.decrypt_padded_vec_mut::<Pkcs7>(ciphertext).unwrap())
}

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@ -1 +1 @@
pub mod crypto;