1 files changed, 152 insertions, 3 deletions

diff --git a/src/daemon.rs b/src/daemon.rs
index 4895a48..8952d78 100644
--- a/src/daemon.rs
+++ b/src/daemon.rs
@@ -36,6 +36,143 @@ const REJOIN_INTERVAL: Duration = Duration::from_secs(60);
 /// How often to sync DHT-replicated values to local store (5 s).
 const SYNC_INTERVAL: Duration = Duration::from_secs(5);
 
+const INDEX_PAGE: &str = "\
+tesseras-paste
+
+	Decentralized pastebin built on the tesseras-dht
+	Kademlia DHT. Pastes are encrypted with XChaCha20-
+	Poly1305, content-addressed via SHA-256, and
+	replicated across the network. No accounts, no
+	databases, no JavaScript.
+
+	\"In the beginning there was the server,
+	 and the server was centralized,
+	 and the centralized was fragile,
+	 and the fragile was doomed.\"
+
+		-- Apocrypha of the Lost Nodes
+
+
+Why
+
+	Pastebin.com sold out and filled with ads.
+	Ghostbin shut down. Hastebin went offline.
+	ZeroBin stopped being maintained.
+	PrivateBin requires a server you must trust.
+
+	Every centralized pastebin is one decision away
+	from disappearing, censoring, or monetizing your
+	content.
+
+	We got tired of renting someone else's clipboard.
+
+	tesseras-paste has no single point of failure.
+	No company can shut it down. No server can be
+	seized. Your paste lives as long as the network
+	has nodes.
+
+
+Philosophy
+
+	We believe in:
+	  - Code you can read in an afternoon
+	  - Protocols you can implement in a weekend
+	  - Systems that work without permission
+	  - Networks that survive their creators
+
+	We do not believe in:
+	  - Move fast and break things
+	  - Microservices for a text file
+	  - 400MB Docker images to serve hello world
+	  - npm install the-entire-internet
+
+
+How it works
+
+	1. You write text (or pipe it from stdin)
+	2. tp encrypts it with a random key
+	3. SHA-256 hashes the ciphertext into a content
+	   address
+	4. The encrypted blob is stored on the K-closest
+	   DHT nodes
+	5. The URL contains the only key that decrypts it
+	6. The network never sees your plaintext
+
+
+Quick start
+
+	Install from crates.io:
+
+		$ cargo install tesseras-paste
+
+	Start the daemon (connects to the public bootstrap
+	nodes automatically via DNS SRV):
+
+		$ tpd -d /var/tesseras-paste -w 9999
+
+	Create a paste:
+
+		$ echo 'hello world' | tp put
+		4zxDwJQEte37CQE4xzVCB1GaNodBprLUHjHcWzhTqP7Y#...
+
+	Retrieve it:
+
+		$ tp get 4zxDwJQEte37CQE4xzVCB1GaNodBprLUHjHcWzhTqP7Y#...
+		hello world
+
+	Public (unencrypted) paste:
+
+		$ echo 'visible to all' | tp put -p
+		EbpnKntDRBkuDKJuFKY7Ke7jM9ygtLCSYpmykXvzWb8U
+
+	Pin a paste so it never expires:
+
+		$ tp pin <key>
+
+
+Bootstrap nodes
+
+	bootstrap1.tesseras.net	port 4433
+	bootstrap2.tesseras.net	port 4433
+
+
+Source code
+
+	official	https://got.tesseras.net
+	mirror		https://git.tesseras.net
+	sourcehut	https://git.sr.ht/~ijanc/tesseras
+	github		https://github.com/tesseras-net
+
+
+Donate
+
+	Bitcoin	bc1qm3srpwnpe3y58mhn7lp37lyw0s45tfdganvat5
+
+
+Website
+
+	https://tesseras.net
+
+
+Greets
+
+	To my beloved Aninha, for the patience and love.
+
+	To the cypherpunks, for writing code instead
+	of laws.
+
+	To OpenBSD, for building an OS where security
+	is not a feature but a principle.
+
+	To everyone running a node: you ARE the network.
+
+
+See also
+
+	tp(1)	https://p.tesseras.net/64RQsdrPsmtdYzLQX9SQN3NBkuU1fD1pQMGdYkUXERV5
+	tpd(1)	https://p.tesseras.net/Ho4jVs1tj4endcZ3ymus3Tm33XGze2tz2K8Qey4EMTRD
+";
+
 /// A request from the socket thread to the main thread.
 pub struct DaemonRequest {
     pub cmd: Request,
@@ -56,6 +193,15 @@ pub fn run_daemon(
     let mut last_sync = Instant::now();
     let mut last_rejoin = Instant::now();
 
+    // Block + remove paste on disk when a remote
+    // delete (store TTL=0) arrives from the DHT.
+    let del_store = store.clone();
+    node.set_delete_callback(move |key: &[u8]| {
+        del_store.block(key);
+        del_store.remove_paste(key);
+        log::info!("remote delete: blocked key {}", crate::base58::encode(key));
+    });
+
     log::info!("daemon main loop started");
 
     while !shutdown.load(Ordering::Relaxed) {
@@ -189,8 +335,8 @@ fn handle_request(
                 store.paste_count(),
                 m.messages_sent,
                 m.messages_received,
-                m.lookups_completed,
                 m.lookups_started,
+                m.lookups_completed,
             );
             Response::Ok(status)
         }
@@ -205,6 +351,9 @@ fn sync_dht_to_store(node: &Node, store: &PasteStore) {
         if key.len() != 32 {
             continue;
         }
+        if store.is_blocked(&key) {
+            continue;
+        }
         if store.get_paste(&key).is_none() {
             let _ = store.put_paste(&key, &value);
         }
@@ -473,8 +622,8 @@ fn handle_http(
         http_response(
             &mut stream,
             200,
-            "text/plain",
-            b"Hello Tesseras World\n",
+            "text/plain; charset=utf-8",
+            INDEX_PAGE.as_bytes(),
         );
         return;
     }