From ac6ea29db98070ac2e190a9ee008fb444292f3b5 Mon Sep 17 00:00:00 2001
From: tonycao <tonycao@local>
Date: Mon, 14 Sep 2026 20:36:45 +0800
Subject: [PATCH] hostdemo: show mode runs session_loop (fix PDL=0 DUB storm,
 zero-pre-bake works)
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Commit ab8090b emptied the show-mode 'known' fixture list (default) but
left its step state machine intact: with known.len()==0 the machine
oscillates step 0<->1 through the '_' arm, emitting malformed
DISC_UNIQUE_BRANCH frames with PDL=0 forever.  The DUT's pool proxy
correctly ignores them, so discovery never saw a single fixture.

Fix: after the AECH claim, show mode now enters session_loop() — the
verified zero-pre-baked full-space bisect (pool-answered DUBs, collision
pulses, UN_MUTE/MUTE) plus GET DEVICE_INFO and encrypted DMX playback on
the discovered addresses.  hybrid keeps the legacy template behaviour.

Bench: 3/3 fixtures discovered (0899500026c9 / 010734880900 /
010734670125), addresses 1/129/101 read back, 1386-frame DMX run —
locally and from the Windows host over udprelay.
---
 src/hostdemo.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/hostdemo.rs b/src/hostdemo.rs
index 0b87899..6533610 100644
--- a/src/hostdemo.rs
+++ b/src/hostdemo.rs
@@ -503,6 +503,17 @@ pub fn run(target: &str, bind_ip: &str, secs: u64) {
         if !aere_ok { println!("[{}] ⚠ 未收到有效 AERE — 认领可能失败, DMX 将无法解密!", label); }
         println!("[{}] 认领完成 B12=0x{:08x}; {}", label, bc,
                  if is_show { "地址1-32 炫彩呼吸 (零模板纯自构造 DMX+RDM)" } else { "verbatim DMX + 模板 RDM" });
+        // ★show 模式: 认领后进入统一会话环 — 零预制全空间二分发现 + 按发现地址播放。
+        // (旧 show 轮询循环依赖非空 known 清单; 67866e2 起 known 默认为空,
+        //  step 状态机在 0↔1 死循环并发出 PDL=0 的畸形 DUB, DUB 池应答因此全静默
+        //  — 2026-09-14 本机 Linux 版定位)
+        if is_show {
+            let run_secs = if secs == 0 { u64::MAX } else { secs };
+            println!("[SHOW] 进入统一会话环: 零预制二分发现 + 播放 ({}s)", if secs == 0 { 0 } else { secs });
+            send_key_burst(&sock);
+            session_loop(&sock, &dst, target, &mut rng, bc, run_secs);
+            return;
+        }
         let rdm_t: Option<Vec<u8>> = base_rdm;
         // HOSTDEMO_KNOWN=uid12hex[,uid12hex...] 覆盖默认灯具清单
         // (用于对测仿真 Butler/其他 UID 的设备; 默认 = 台架 3 台真灯)