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feat(ui): DM auto-resend + incoming dedup + channel relay ring

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DM auto-resend (delivery status follow-up):
- New pref dm_resend_count (0-5, default 2), Settings › Messages › Resend.
  Schema sentinel 0xC0DE0009 → 0xC0DE000A; old files clamp to the default.
- When a pending on-device DM passes its ACK deadline, tickDmResends()
  (driven from UITask::loop, so it runs in the background regardless of the
  active screen) re-sends with the next attempt# reusing the original
  timestamp, refreshing ack_tag/deadline, until resends run out → then ✗.
- dmEffectiveStatus keeps the entry pending while resends remain.

Incoming DM dedup:
- A retry reuses the sender timestamp + text but has a fresh packet hash, so
  the mesh dup-filter passes it. addDMMsg now takes sender_timestamp and drops
  copies matching prefix+timestamp+text. sender_timestamp plumbed from
  MyMesh::queueMessage through AbstractUITask/UITask.

Channel relay ring:
- Replace the single-slot relayed-into-mesh tracker with a 4-slot ring so a
  quick burst of channel sends are each matched to their repeater echo.
  Receive-path hashing still gated (now on _relay_active) so the hot flood
  path is untouched when idle.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
MarekZegare4
2026-06-14 15:13:29 +02:00
parent 54b53f7f0f
commit aa4bb490d0
9 changed files with 166 additions and 38 deletions
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93
examples/companion_radio/ui-new/QuickMsgScreen.h
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@@ -28,9 +28,11 @@ class QuickMsgScreen : public UIScreen {
int _sel_channel_idx;
bool _sending_to_channel;
// Carries the just-sent DM's ACK tag + deadline from sendText() to afterSend().
// Carries the just-sent DM's ACK tag + deadline + send timestamp from
// sendText() to afterSend().
uint32_t _last_ack_tag = 0;
uint32_t _last_ack_deadline_ms = 0;
uint32_t _last_send_ts = 0;
// MSG_PICK (shared)
int _msg_sel, _msg_scroll;
@@ -113,6 +115,12 @@ class QuickMsgScreen : public UIScreen {
uint8_t ack_status; // AckState; meaningful only when outgoing
uint32_t ack_tag; // expected_ack CRC to match against onMsgAck()
uint32_t ack_deadline_ms; // millis() by which a pending ACK must arrive
// Sender-perspective message timestamp: the send timestamp for outgoing
// (reused verbatim on resend so the recipient treats it as a retry), or the
// sender_timestamp for incoming (used to dedup retried copies). 0 = unknown.
uint32_t msg_ts;
uint8_t attempt; // last attempt number sent (outgoing); next resend = attempt+1
uint8_t resends_left; // remaining auto-resends before the marker shows ✗
};
static const int DM_HIST_MAX = 64;
DmHistEntry _dm_hist[DM_HIST_MAX];
@@ -304,8 +312,11 @@ class QuickMsgScreen : public UIScreen {
// ack_tag != 0 marks an outgoing DM as awaiting an end-to-end ACK by
// ack_deadline_ms; 0 means "sent, no confirmation possible" (no path / incoming).
// msg_ts = sender-perspective timestamp (send ts for outgoing / sender_timestamp
// for incoming); resends = remaining auto-resends for an outgoing pending DM.
void storeDMMsg(const uint8_t* pub_key, bool outgoing, const char* text,
uint32_t ack_tag = 0, uint32_t ack_deadline_ms = 0) {
uint32_t ack_tag = 0, uint32_t ack_deadline_ms = 0,
uint32_t msg_ts = 0, uint8_t resends = 0) {
int pos;
if (_dm_hist_count < DM_HIST_MAX) {
pos = (_dm_hist_head + _dm_hist_count) % DM_HIST_MAX;
@@ -322,12 +333,18 @@ class QuickMsgScreen : public UIScreen {
_dm_hist[pos].ack_status = (outgoing && ack_tag) ? ACK_PENDING : ACK_NONE;
_dm_hist[pos].ack_tag = ack_tag;
_dm_hist[pos].ack_deadline_ms = ack_deadline_ms;
_dm_hist[pos].msg_ts = msg_ts;
_dm_hist[pos].attempt = 0;
_dm_hist[pos].resends_left = (outgoing && ack_tag) ? resends : 0;
}
// Effective status for display: a pending ACK past its deadline reads as
// failed (no separate timer needed — evaluated lazily at render time).
// Effective status for display. A pending ACK only reads as failed once its
// deadline has passed AND no auto-resends remain — while resends_left > 0 the
// entry stays pending (tickDmResends() retries / finalises it). Safety net for
// when the tick hasn't run yet; the tick is the authority that writes ACK_FAIL.
AckState dmEffectiveStatus(const DmHistEntry& e) const {
if (e.ack_status == ACK_PENDING && (int32_t)(millis() - e.ack_deadline_ms) >= 0)
if (e.ack_status == ACK_PENDING && e.resends_left == 0 &&
(int32_t)(millis() - e.ack_deadline_ms) >= 0)
return ACK_FAIL;
return (AckState)e.ack_status;
}
@@ -374,7 +391,10 @@ class QuickMsgScreen : public UIScreen {
_viewing_max_seen = 0;
_task->showAlert("Sent!", 600);
} else if (ok) {
storeDMMsg(_sel_contact.id.pub_key, true, msg, _last_ack_tag, _last_ack_deadline_ms);
NodePrefs* np = _task->getNodePrefs();
uint8_t resends = np ? np->dm_resend_count : 0;
storeDMMsg(_sel_contact.id.pub_key, true, msg, _last_ack_tag,
_last_ack_deadline_ms, _last_send_ts, resends);
_dm_hist_sel = 0;
_dm_hist_scroll = 0;
_phase = DM_HIST;
@@ -388,16 +408,19 @@ class QuickMsgScreen : public UIScreen {
bool sendText(const char* msg) {
_last_ack_tag = 0;
_last_ack_deadline_ms = 0;
_last_send_ts = 0;
if (_sending_to_channel) {
ChannelDetails ch;
if (!the_mesh.getChannel(_sel_channel_idx, ch)) return false;
return the_mesh.sendGroupMessage(rtc_clock.getCurrentTime(), ch.channel,
the_mesh.getNodeName(), msg, strlen(msg));
} else {
uint32_t send_ts = rtc_clock.getCurrentTime();
uint32_t expected_ack = 0, est_timeout = 0;
bool ok = the_mesh.sendMessage(_sel_contact, rtc_clock.getCurrentTime(), 0,
bool ok = the_mesh.sendMessage(_sel_contact, send_ts, 0,
msg, expected_ack, est_timeout) > 0;
if (ok && expected_ack) {
_last_send_ts = send_ts;
_last_ack_tag = expected_ack;
// Generous margin over the base estimate so a slow multi-hop ACK isn't
// prematurely shown as failed.
@@ -627,8 +650,20 @@ public:
}
}
void addDMMsg(const uint8_t* pub_key, bool outgoing, const char* text) {
storeDMMsg(pub_key, outgoing, text);
void addDMMsg(const uint8_t* pub_key, bool outgoing, const char* text,
uint32_t sender_timestamp = 0) {
// Drop retried copies of an incoming DM: a resend reuses the sender's
// timestamp and text but carries a fresh packet hash, so the mesh dup-filter
// lets it through. Match on prefix + sender_timestamp + text to suppress it.
if (!outgoing && sender_timestamp != 0) {
for (int i = 0; i < _dm_hist_count; i++) {
const DmHistEntry& e = _dm_hist[(_dm_hist_head + i) % DM_HIST_MAX];
if (!e.outgoing && e.msg_ts == sender_timestamp &&
memcmp(e.prefix, pub_key, 4) == 0 && strcmp(e.text, text) == 0)
return; // duplicate retry — already in history
}
}
storeDMMsg(pub_key, outgoing, text, 0, 0, outgoing ? 0 : sender_timestamp, 0);
}
// Called when an end-to-end ACK arrives (routed from MyMesh::onAckRecv).
@@ -644,6 +679,46 @@ public:
}
}
// Look up a contact by 4-byte pub_key prefix (as stored in DmHistEntry).
bool contactByPrefix(const uint8_t* prefix, ContactInfo& out) const {
int total = the_mesh.getNumContacts();
for (int i = 0; i < total; i++) {
ContactInfo c;
if (the_mesh.getContactByIdx(i, c) && memcmp(c.id.pub_key, prefix, 4) == 0) {
out = c;
return true;
}
}
return false;
}
// Background tick (called every UI loop, regardless of the active screen) that
// drives auto-resend of on-device DMs. When a pending DM passes its deadline
// with no ACK: resend with the next attempt# (reusing the original timestamp so
// the recipient dedups) while resends remain, else mark it failed (✗).
void tickDmResends() {
uint32_t now = millis();
for (int i = 0; i < _dm_hist_count; i++) {
DmHistEntry& e = _dm_hist[(_dm_hist_head + i) % DM_HIST_MAX];
if (!e.outgoing || e.ack_status != ACK_PENDING) continue;
if ((int32_t)(now - e.ack_deadline_ms) < 0) continue; // still waiting
if (e.resends_left == 0) { e.ack_status = ACK_FAIL; continue; }
ContactInfo c;
if (!contactByPrefix(e.prefix, c)) { e.ack_status = ACK_FAIL; continue; }
uint32_t expected_ack = 0, est_timeout = 0;
uint8_t next_attempt = e.attempt + 1;
if (the_mesh.sendMessage(c, e.msg_ts, next_attempt, e.text,
expected_ack, est_timeout) > 0 && expected_ack) {
e.attempt = next_attempt;
e.ack_tag = expected_ack; // each attempt has a distinct ACK CRC
e.ack_deadline_ms = now + est_timeout + 4000;
e.resends_left--;
} else {
e.ack_status = ACK_FAIL; // couldn't compose/send — give up
}
}
}
int getDMUnreadTotal() const {
return _task->getDMUnreadTotal();
}