Added 13 files (automated)

13 files changed, 695 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
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new file mode 100644
index 0000000..13566b8
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new file mode 100644
index 0000000..d2b0049
--- /dev/null
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new file mode 100644
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new file mode 100644
index 0000000..b37ad1d
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new file mode 100644
index 0000000..86d2aea
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new file mode 100644
index 0000000..0af0e97
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,3 @@
+[workspace]
+members = [ "where-rs", "whered", "where-shared"]
+resolver = "2"
\ No newline at end of file
diff --git a/where-rs/Cargo.toml b/where-rs/Cargo.toml
new file mode 100644
index 0000000..a2722d8
--- /dev/null
+++ b/where-rs/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "where-rs"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[[bin]]
+name = "where"
+path = "src/main.rs"
+
+[dependencies]
+where-shared = { path = "../where-shared" }
+coreutils_core = "0.1.1"
\ No newline at end of file
diff --git a/where-rs/src/main.rs b/where-rs/src/main.rs
new file mode 100644
index 0000000..0e23482
--- /dev/null
+++ b/where-rs/src/main.rs
@@ -0,0 +1,15 @@
+use std::net::UdpSocket;
+use coreutils_core::ByteSlice;
+use where_shared::*;
+
+fn main() {
+    let socket = UdpSocket::bind("0.0.0.0:0").expect("Could not start a UDP socket.");
+    socket.send_to(&WHERED_MAGIC, "127.0.0.1:15").expect("Could not send data to the server.");
+
+    let mut buf = [0; 1024];
+    socket.recv_from(&mut buf).expect("No data to receive from the server.");
+
+    /*let list = SessionCollection::from_bytes(buf.to_vec());
+    println!("{:?}", list);*/
+    println!("{}", String::from_utf8_lossy(&buf));
+}
\ No newline at end of file
diff --git a/where-shared/Cargo.toml b/where-shared/Cargo.toml
new file mode 100644
index 0000000..1f5507b
--- /dev/null
+++ b/where-shared/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "where-shared"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+coreutils_core = "0.1.1"
\ No newline at end of file
diff --git a/where-shared/src/lib.rs b/where-shared/src/lib.rs
new file mode 100644
index 0000000..1ea21a7
--- /dev/null
+++ b/where-shared/src/lib.rs
@@ -0,0 +1,121 @@
+use coreutils_core::ByteSlice;
+use coreutils_core::os::utmpx::UtmpxKind;
+
+pub const WHERED_MAGIC: [u8; 4] = *b"WHRD";
+
+#[derive(Debug)]
+pub struct Session {
+    user: String,
+    pid: i32,
+    tty: String,
+    remote: Option<String>,
+    active: bool,
+    login: i64
+}
+
+#[derive(Debug)]
+pub struct SessionCollection<Session> {
+    inner: Vec<Session>
+}
+
+impl SessionCollection<Session> {
+    pub fn fetch() -> SessionCollection<Session> {
+        let mut output: SessionCollection<Session> = SessionCollection {
+            inner: vec![]
+        };
+        let utmp = coreutils_core::os::utmpx::UtmpxSet::system();
+
+        for item in utmp {
+            if item.entry_type() != UtmpxKind::UserProcess && item.entry_type() != UtmpxKind::DeadProcess {
+                continue;
+            }
+
+            let host = item.host().to_string();
+
+            output.inner.push(Session {
+                user: item.user().to_string(),
+                pid: item.process_id(),
+                tty: item.device_name().to_string(),
+                remote: if &host == "" {
+                    None
+                } else {
+                    Some(host)
+                },
+                active: item.entry_type() == UtmpxKind::UserProcess,
+                login: item.timeval().tv_sec
+            });
+        }
+
+        output
+    }
+
+    pub fn into_bytes(self) -> Vec<u8> {
+        let mut bytes: Vec<u8> = vec![];
+
+        for item in self.inner {
+            bytes.append(&mut item.into_bytes().to_vec());
+            bytes.append(&mut vec![0, 0, 0, 0]);
+        }
+
+        bytes
+    }
+
+    /*pub fn from_bytes(bytes: Vec<u8>) -> SessionCollection<Session> {
+        let entries = bytes.split([0, 0]);
+        let mut final_entries: Vec<Session> = vec![];
+
+        for item in entries {
+            let parts: Vec<&[u8]> = item.split(0).collect();
+            if item.split(0).count() == 0 {
+                continue;
+            }
+
+            /*final_entries.push(Session {
+                //pid: i32::from_be_bytes(parts[0].as_bytes()),
+                //login: i64::from_be_bytes(parts[1].as_bytes()),
+                pid: 0,
+                login: 0,
+                user: parts[2].to_string(),
+                tty: parts[3].to_string(),
+                remote: if parts[4] == b"\xff".to_str().unwrap() {
+                    None
+                } else {
+                    Some(parts[4].to_string())
+                },
+                active: parts[5] == b"\xff".to_str().unwrap()
+            });*/
+        }
+
+        SessionCollection {
+            inner: final_entries
+        }
+    }*/
+}
+
+impl Session {
+    pub fn into_bytes(self) -> Vec<u8> {
+        let mut bytes: Vec<u8> = vec![];
+        let mut host_bytes = self.remote.clone().unwrap_or(String::from("!")).as_bytes().to_vec();
+        let mut full = vec![255];
+
+        bytes.append(&mut self.pid.to_be_bytes().to_vec());
+        bytes.append(&mut self.login.to_be_bytes().to_vec());
+        bytes.append(&mut (self.user.len() as u32).to_be_bytes().to_vec());
+        bytes.append(&mut self.user.as_bytes().to_vec());
+        bytes.append(&mut (self.tty.len() as u32).to_be_bytes().to_vec());
+        bytes.append(&mut self.tty.as_bytes().to_vec());
+        bytes.append(&mut (host_bytes.len() as u32).to_be_bytes().to_vec());
+        bytes.append(if let Some(_) = self.remote {
+            &mut host_bytes
+        } else {
+            &mut full
+        });
+        bytes.push(if self.active {
+            1
+        } else {
+            0
+        });
+
+        bytes
+    }
+}
\ No newline at end of file
diff --git a/whered/Cargo.toml b/whered/Cargo.toml
new file mode 100644
index 0000000..5e9d438
--- /dev/null
+++ b/whered/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "whered"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+where-shared = { path = "../where-shared" }
\ No newline at end of file
diff --git a/whered/src/main.rs b/whered/src/main.rs
new file mode 100644
index 0000000..efc3fcc
--- /dev/null
+++ b/whered/src/main.rs
@@ -0,0 +1,23 @@
+use std::net::UdpSocket;
+use where_shared::*;
+
+fn main() {
+    let socket = UdpSocket::bind("0.0.0.0:15").expect("Could not bind to port 15, is another instance of whered running?");
+
+    loop {
+        let mut buf = [0; WHERED_MAGIC.len()];
+        let Ok((_, src)) = socket.recv_from(&mut buf) else {
+            eprintln!("Failed to receive data from the client, ignoring");
+            continue
+        };
+
+        println!("{src}: New client!");
+
+        let sessions = SessionCollection::fetch();
+        if let Err(_) = socket.send_to(&*sessions.into_bytes(), src) {
+            eprintln!("{src}: Failed to send data back to the client, ignoring");
+        } else {
+            println!("{src}: Completed request");
+        }
+    }
+}
\ No newline at end of file