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* Companion: experimental CMD_SEND_DISCOVERY_REQ -> PUSH_CODE_DISCOVERY_RESPONSE

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This commit is contained in:
Scott Powell
2025-07-31 13:04:16 +10:00
parent f87e856347
commit fcdf342db6
4 changed files with 70 additions and 9 deletions
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67
examples/companion_radio/MyMesh.cpp
View File

@@ -41,7 +41,7 @@
#define CMD_SEND_TRACE_PATH 36
#define CMD_SET_DEVICE_PIN 37
#define CMD_SET_OTHER_PARAMS 38
#define CMD_SEND_TELEMETRY_REQ 39
#define CMD_SEND_TELEMETRY_REQ 39 // can deprecate this
#define CMD_GET_CUSTOM_VARS 40
#define CMD_SET_CUSTOM_VAR 41
#define CMD_GET_ADVERT_PATH 42
@@ -49,6 +49,7 @@
// NOTE: CMD range 44..49 parked, potentially for WiFi operations
#define CMD_SEND_BINARY_REQ 50
#define CMD_FACTORY_RESET 51
#define CMD_SEND_DISCOVERY_REQ 52
#define RESP_CODE_OK 0
#define RESP_CODE_ERR 1
@@ -97,6 +98,7 @@
#define PUSH_CODE_NEW_ADVERT 0x8A
#define PUSH_CODE_TELEMETRY_RESPONSE 0x8B
#define PUSH_CODE_BINARY_RESPONSE 0x8C
#define PUSH_CODE_DISCOVERY_RESPONSE 0x8D
#define ERR_CODE_UNSUPPORTED_CMD 1
#define ERR_CODE_NOT_FOUND 2
@@ -527,6 +529,38 @@ void MyMesh::onContactResponse(const ContactInfo &contact, const uint8_t *data,
}
}
bool MyMesh::onContactPathRecv(ContactInfo& contact, uint8_t* in_path, uint8_t in_path_len, uint8_t* out_path, uint8_t out_path_len, uint8_t extra_type, uint8_t* extra, uint8_t extra_len) {
if (extra_type == PAYLOAD_TYPE_RESPONSE && extra_len > 4) {
uint32_t tag;
memcpy(&tag, extra, 4);
if (tag == pending_discovery) { // check for matching response tag)
pending_discovery = 0;
if (in_path_len > MAX_PATH_SIZE || out_path_len > MAX_PATH_SIZE) {
MESH_DEBUG_PRINTLN("onContactPathRecv, invalid path sizes: %d, %d", in_path_len, out_path_len);
} else {
int i = 0;
out_frame[i++] = PUSH_CODE_DISCOVERY_RESPONSE;
out_frame[i++] = 0; // reserved
memcpy(&out_frame[i], contact.id.pub_key, 6);
i += 6; // pub_key_prefix
out_frame[i++] = out_path_len;
memcpy(&out_frame[i], out_path, out_path_len);
i += out_path_len;
out_frame[i++] = in_path_len;
memcpy(&out_frame[i], in_path, in_path_len);
i += in_path_len;
_serial->writeFrame(out_frame, i);
}
return false; // DON'T send reciprocal path!
}
}
// let base class handle received path and data
return BaseChatMesh::onContactPathRecv(contact, in_path, in_path_len, out_path, out_path_len, extra_type, extra, extra_len);
}
void MyMesh::onRawDataRecv(mesh::Packet *packet) {
if (packet->payload_len + 4 > sizeof(out_frame)) {
MESH_DEBUG_PRINTLN("onRawDataRecv(), payload_len too long: %d", packet->payload_len);
@@ -589,7 +623,7 @@ MyMesh::MyMesh(mesh::Radio &radio, mesh::RNG &rng, mesh::RTCClock &rtc, SimpleMe
_cli_rescue = false;
offline_queue_len = 0;
app_target_ver = 0;
pending_login = pending_status = pending_telemetry = pending_req = 0;
pending_discovery = pending_login = pending_status = pending_telemetry = pending_req = 0;
next_ack_idx = 0;
sign_data = NULL;
dirty_contacts_expiry = 0;
@@ -1134,7 +1168,7 @@ void MyMesh::handleCmdFrame(size_t len) {
if (result == MSG_SEND_FAILED) {
writeErrFrame(ERR_CODE_TABLE_FULL);
} else {
pending_req = pending_telemetry = pending_status = 0;
pending_discovery = pending_req = pending_telemetry = pending_status = 0;
memcpy(&pending_login, recipient->id.pub_key, 4); // match this to onContactResponse()
out_frame[0] = RESP_CODE_SENT;
out_frame[1] = (result == MSG_SEND_SENT_FLOOD) ? 1 : 0;
@@ -1154,7 +1188,7 @@ void MyMesh::handleCmdFrame(size_t len) {
if (result == MSG_SEND_FAILED) {
writeErrFrame(ERR_CODE_TABLE_FULL);
} else {
pending_req = pending_telemetry = pending_login = 0;
pending_discovery = pending_req = pending_telemetry = pending_login = 0;
// FUTURE: pending_status = tag; // match this in onContactResponse()
memcpy(&pending_status, recipient->id.pub_key, 4); // legacy matching scheme
out_frame[0] = RESP_CODE_SENT;
@@ -1166,6 +1200,27 @@ void MyMesh::handleCmdFrame(size_t len) {
} else {
writeErrFrame(ERR_CODE_NOT_FOUND); // contact not found
}
} else if (cmd_frame[0] == CMD_SEND_DISCOVERY_REQ && cmd_frame[1] == 0 && len >= 2 + PUB_KEY_SIZE) {
uint8_t *pub_key = &cmd_frame[2];
ContactInfo *recipient = lookupContactByPubKey(pub_key, PUB_KEY_SIZE);
if (recipient) {
uint32_t tag, est_timeout;
// 'Path Discovery' is just a special case of flood + Telemetry req
int result = sendRequest(*recipient, REQ_TYPE_GET_TELEMETRY_DATA, tag, est_timeout);
if (result == MSG_SEND_FAILED) {
writeErrFrame(ERR_CODE_TABLE_FULL);
} else {
pending_telemetry = pending_status = pending_login = pending_req = 0;
pending_discovery = tag; // match this in onContactResponse()
out_frame[0] = RESP_CODE_SENT;
out_frame[1] = (result == MSG_SEND_SENT_FLOOD) ? 1 : 0;
memcpy(&out_frame[2], &tag, 4);
memcpy(&out_frame[6], &est_timeout, 4);
_serial->writeFrame(out_frame, 10);
}
} else {
writeErrFrame(ERR_CODE_NOT_FOUND); // contact not found
}
} else if (cmd_frame[0] == CMD_SEND_TELEMETRY_REQ && len >= 4 + PUB_KEY_SIZE) { // can deprecate, in favour of CMD_SEND_BINARY_REQ
uint8_t *pub_key = &cmd_frame[4];
ContactInfo *recipient = lookupContactByPubKey(pub_key, PUB_KEY_SIZE);
@@ -1175,7 +1230,7 @@ void MyMesh::handleCmdFrame(size_t len) {
if (result == MSG_SEND_FAILED) {
writeErrFrame(ERR_CODE_TABLE_FULL);
} else {
pending_status = pending_login = pending_req = 0;
pending_discovery = pending_status = pending_login = pending_req = 0;
pending_telemetry = tag; // match this in onContactResponse()
out_frame[0] = RESP_CODE_SENT;
out_frame[1] = (result == MSG_SEND_SENT_FLOOD) ? 1 : 0;
@@ -1211,7 +1266,7 @@ void MyMesh::handleCmdFrame(size_t len) {
if (result == MSG_SEND_FAILED) {
writeErrFrame(ERR_CODE_TABLE_FULL);
} else {
pending_status = pending_login = pending_telemetry = 0;
pending_discovery = pending_status = pending_login = pending_telemetry = 0;
pending_req = tag; // match this in onContactResponse()
out_frame[0] = RESP_CODE_SENT;
out_frame[1] = (result == MSG_SEND_SENT_FLOOD) ? 1 : 0;

3
examples/companion_radio/MyMesh.h
View File

@@ -101,6 +101,7 @@ protected:
void logRxRaw(float snr, float rssi, const uint8_t raw[], int len) override;
bool isAutoAddEnabled() const override;
bool onContactPathRecv(ContactInfo& from, uint8_t* in_path, uint8_t in_path_len, uint8_t* out_path, uint8_t out_path_len, uint8_t extra_type, uint8_t* extra, uint8_t extra_len) override;
void onDiscoveredContact(ContactInfo &contact, bool is_new, uint8_t path_len, const uint8_t* path) override;
void onContactPathUpdated(const ContactInfo &contact) override;
bool processAck(const uint8_t *data) override;
@@ -161,7 +162,7 @@ private:
NodePrefs _prefs;
uint32_t pending_login;
uint32_t pending_status;
uint32_t pending_telemetry; // pending _TELEMETRY_REQ
uint32_t pending_telemetry, pending_discovery; // pending _TELEMETRY_REQ
uint32_t pending_req; // pending _BINARY_REQ
BaseSerialInterface *_serial;

8
src/helpers/BaseChatMesh.cpp
View File

@@ -235,9 +235,13 @@ bool BaseChatMesh::onPeerPathRecv(mesh::Packet* packet, int sender_idx, const ui
ContactInfo& from = contacts[i];
// NOTE: for this impl, we just replace the current 'out_path' regardless, whenever sender sends us a new out_path.
return onContactPathRecv(from, packet->path, packet->path_len, path, path_len, extra_type, extra, extra_len);
}
bool BaseChatMesh::onContactPathRecv(ContactInfo& from, uint8_t* in_path, uint8_t in_path_len, uint8_t* out_path, uint8_t out_path_len, uint8_t extra_type, uint8_t* extra, uint8_t extra_len) {
// NOTE: default impl, we just replace the current 'out_path' regardless, whenever sender sends us a new out_path.
// FUTURE: could store multiple out_paths per contact, and try to find which is the 'best'(?)
memcpy(from.out_path, path, from.out_path_len = path_len); // store a copy of path, for sendDirect()
memcpy(from.out_path, out_path, from.out_path_len = out_path_len); // store a copy of path, for sendDirect()
from.lastmod = getRTCClock()->getCurrentTime();
onContactPathUpdated(from);

1
src/helpers/BaseChatMesh.h
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@@ -95,6 +95,7 @@ protected:
virtual void onDiscoveredContact(ContactInfo& contact, bool is_new, uint8_t path_len, const uint8_t* path) = 0;
virtual bool processAck(const uint8_t *data) = 0;
virtual void onContactPathUpdated(const ContactInfo& contact) = 0;
virtual bool onContactPathRecv(ContactInfo& from, uint8_t* in_path, uint8_t in_path_len, uint8_t* out_path, uint8_t out_path_len, uint8_t extra_type, uint8_t* extra, uint8_t extra_len);
virtual void onMessageRecv(const ContactInfo& contact, mesh::Packet* pkt, uint32_t sender_timestamp, const char *text) = 0;
virtual void onCommandDataRecv(const ContactInfo& contact, mesh::Packet* pkt, uint32_t sender_timestamp, const char *text) = 0;
virtual void onSignedMessageRecv(const ContactInfo& contact, mesh::Packet* pkt, uint32_t sender_timestamp, const uint8_t *sender_prefix, const char *text) = 0;