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fix(firmware): prepend RNode on-air header so RNS peers accept our announce

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RNode firmware frames every LoRa packet as [1-byte header][payload]: on TX it
writes `random(256) & 0xF0` (split-flag clear for a single packet), and on RX
it reads+strips that byte before handing the packet to RNS. Our bridge sent the
raw RNS packet, so a real RNode consumed our flags byte as its header and gave
RNS a 1-byte-shifted packet that failed validation — the node received our RF
but never registered us as a destination.

Prepend a 0x00 RNode header (single, non-split) to the Reticulum announce.
Verified live: node .116 now emits an announce event for our dest hash and
registers "Archy-Messh" as an LXMF delivery contact.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Dorian 2026-07-01 22:36:52 +01:00
parent d882458885
commit 5fa32811d5
1 changed files with 8 additions and 2 deletions
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10
firmware/src/main.cpp
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@ -499,8 +499,14 @@ static void sendReticulumAnnounce() {
uint8_t sig[64]; uint8_t sig[64];
ed25519_sign(sig, signed_data, sl, rnsEdPub, rnsEdPrv); ed25519_sign(sig, signed_data, sl, rnsEdPub, rnsEdPrv);
uint8_t pkt[2 + 16 + 1 + 64 + 10 + 10 + 64 + 32]; size_t p = 0; uint8_t pkt[1 + 2 + 16 + 1 + 64 + 10 + 10 + 64 + 32]; size_t p = 0;
pkt[p++] = 0x01; // flags: HEADER_1|BROADCAST|SINGLE|ANNOUNCE // RNode on-air framing: every LoRa frame starts with a 1-byte RNode header
// (RNode_Firmware transmit(): `random(256) & 0xF0`, split-flag clear for a
// single packet). RNode RX reads+strips it before handing the packet to RNS,
// so we must prepend it or the real RNS packet arrives shifted and fails to
// validate. Low nibble 0 = not a split packet.
pkt[p++] = 0x00; // RNode header (single, non-split)
pkt[p++] = 0x01; // RNS flags: HEADER_1|BROADCAST|SINGLE|ANNOUNCE
pkt[p++] = 0x00; // hops pkt[p++] = 0x00; // hops
memcpy(pkt + p, rnsDestHash, 16); p += 16; memcpy(pkt + p, rnsDestHash, 16); p += 16;
pkt[p++] = 0x00; // context = NONE pkt[p++] = 0x00; // context = NONE