more send stuff, more refactoring

src/solanaceae/tox_p2prng/tox_p2prng.cpp

@@ -1,8 +1,11 @@
 #include "./tox_p2prng.hpp"
 
+#include <solanaceae/contact/components.hpp>
 #include <solanaceae/tox_contacts/components.hpp>
+#include <solanaceae/toxcore/tox_interface.hpp>
 
 #include <iostream>
+#include <vector>
 
 // packets:
 //
@@ -25,6 +28,8 @@
 // secret_request
 //   - id
 
+#define TOX_PKG_ID_FRIEND 0xB1
+#define TOX_PKG_ID_GROUP 0xa6
 
 void ToxP2PRNG::RngState::fillInitalStatePreamble(const ByteSpan id) {
 	// id
@@ -105,6 +110,30 @@ void ToxP2PRNG::RngState::genFinalResult(void) {
 	// we done
 }
 
+P2PRNG::State ToxP2PRNG::RngState::getState(void) const {
+	//DONE, // rng is done, event contains full rng
+	if (!final_result.empty()) {
+		return P2PRNG::DONE;
+	}
+
+	//SECRET, // got a secret (phase start will be denoted by own, secrets received before we have all hmacs get queued up)
+	if (hmacs.size() == contacts.size()) {
+		return P2PRNG::SECRET;
+	}
+
+	//HMAC, // got a hmac (phase start will be denoted by the initiators hmac)
+	if (!hmacs.empty()) {
+		return P2PRNG::HMAC;
+	}
+
+	//INIT, // inital params (incoming or outgoing?)
+	if (!inital_state.empty() && !inital_state_preamble.empty()) {
+		return P2PRNG::INIT;
+	}
+
+	return P2PRNG::UNKNOWN;
+}
+
 ToxP2PRNG::ToxP2PRNG(
 	ToxI& t,
 	ToxEventProviderI& tep,
@@ -137,32 +166,31 @@ ByteSpan ToxP2PRNG::getResult(const ByteSpan id) {
 bool ToxP2PRNG::handlePacket(
 	Contact3Handle c,
 	PKG pkg_type,
-	const uint8_t* data,
+	ByteSpan data
-	const size_t data_size
 ) {
-	if (data_size < 1) {
+	if (data.size < 1) {
 		return false; // waht
 	}
 
 	// rn all are prefixed with ID, so here we go
-	if (data_size < 32) {
+	if (data.size < 32) {
 		std::cerr << "TP2PRNG error: packet without id\n";
 		return false;
 	}
 
-	ByteSpan id{data, 32};
+	ByteSpan id{data.ptr, 32};
 
 	switch (pkg_type) {
 		case PKG::INIT_WITH_HMAC:
-			return handle_init_with_hmac(c, id, data+32, data_size-(32));
+			return handle_init_with_hmac(c, id, {data.ptr+32, data.size-(32)});
 		case PKG::HMAC:
-			return handle_hmac(c, id, data+32, data_size-(32));
+			return handle_hmac(c, id, {data.ptr+32, data.size-(32)});
 		case PKG::HMAC_REQUEST:
-			return handle_hmac_request(c, id, data+32, data_size-(32));
+			return handle_hmac_request(c, id, {data.ptr+32, data.size-(32)});
 		case PKG::SECRET:
-			return handle_secret(c, id, data+32, data_size-(32));
+			return handle_secret(c, id, {data.ptr+32, data.size-(32)});
 		case PKG::SECRET_REQUEST:
-			return handle_secret_request(c, id, data+32, data_size-(32));
+			return handle_secret_request(c, id, {data.ptr+32, data.size-(32)});
 		default:
 			return false;
 	}
@@ -172,15 +200,14 @@ bool ToxP2PRNG::handlePacket(
 
 bool ToxP2PRNG::handleFriendPacket(
 	const uint32_t friend_number,
-	const uint8_t* data,
+	ByteSpan data
-	const size_t data_size
 ) {
 	// packet id + packet id + id
-	if (data_size < 1+1+32) {
+	if (data.size < 1+1+32) {
 		return false;
 	}
 
-	if (data[0] != 0xB1) { // 177
+	if (data[0] != TOX_PKG_ID_FRIEND) {
 		return false;
 	}
 
@@ -191,22 +218,21 @@ bool ToxP2PRNG::handleFriendPacket(
 		return false;
 	}
 
-	return handlePacket(c, tpr_pkg_type, data+2, data_size-2);
+	return handlePacket(c, tpr_pkg_type, {data.ptr+2, data.size-2});
 }
 
 bool ToxP2PRNG::handleGroupPacket(
 	const uint32_t group_number,
 	const uint32_t peer_number,
-	const uint8_t* data,
+	ByteSpan data,
-	const size_t data_size,
 	const bool /*_private*/
 ) {
 	// packet id + packet id + id
-	if (data_size < 1+1+32) {
+	if (data.size < 1+1+32) {
 		return false;
 	}
 
-	if (data[0] != (0x80 | 38u)) { // 0xa6 / 166
+	if (data[0] != TOX_PKG_ID_GROUP) {
 		return false;
 	}
 
@@ -217,48 +243,183 @@ bool ToxP2PRNG::handleGroupPacket(
 		return false;
 	}
 
-	return handlePacket(c, tpr_pkg_type, data+2, data_size-2);
+	return handlePacket(c, tpr_pkg_type, {data.ptr+2, data.size-2});
 }
 
-bool ToxP2PRNG::handle_init_with_hmac(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size) {
+bool ToxP2PRNG::handle_init_with_hmac(Contact3Handle c, ByteSpan id, ByteSpan data) {
 	std::cerr << "TP2PRNG: got packet INIT_WITH_HMAC\n";
 	size_t curser = 0;
 
 	return false;
 }
 
-bool ToxP2PRNG::handle_hmac(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size) {
+bool ToxP2PRNG::handle_hmac(Contact3Handle c, ByteSpan id, ByteSpan data) {
 	std::cerr << "TP2PRNG: got packet HMAC\n";
 	size_t curser = 0;
 
 	return false;
 }
 
-bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size) {
+bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data) {
 	std::cerr << "TP2PRNG: got packet HMAC_REQUEST\n";
 
-	if (data_size > 0) {
+	if (!data.empty()) {
 		std::cerr << "TP2PRNG warning: HMAC_REQUEST pkg has extra data!\n";
 	}
 
+	const auto* rng_state = getRngSate(c, id);
+	if (rng_state == nullptr) {
+		return false;
+	}
+
 	return false;
 }
 
-bool ToxP2PRNG::handle_secret(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size) {
+bool ToxP2PRNG::handle_secret(Contact3Handle c, ByteSpan id, ByteSpan data) {
 	std::cerr << "TP2PRNG: got packet SECRET\n";
 	size_t curser = 0;
 
 	return false;
 }
 
-bool ToxP2PRNG::handle_secret_request(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size) {
+bool ToxP2PRNG::handle_secret_request(Contact3Handle c, ByteSpan id, ByteSpan data) {
 	std::cerr << "TP2PRNG: got packet SECRET_REQUEST\n";
 
-	if (data_size > 0) {
+	if (!data.empty()) {
 		std::cerr << "TP2PRNG warning: SECRET_REQUEST pkg has extra data!\n";
 	}
 
+	const auto* rng_state = getRngSate(c, id);
+	if (rng_state == nullptr) {
 		return false;
+	}
+
+	// can only request secret if secret or done state
+	if (const auto current_state = rng_state->getState(); !(current_state == P2PRNG::SECRET || current_state == P2PRNG::DONE)) {
+		return false;
+	}
+
+	// find self contact
+	// TODO: accel
+	// TODO: do TagSelfStrong over contacts instead?? probably. maybe additionally
+	Contact3Handle self;
+	if (c.all_of<Contact::Components::Self>()) {
+		self = Contact3Handle{*c.registry(), c.get<Contact::Components::Self>().self};
+	} else if (c.all_of<Contact::Components::Parent>()) {
+		Contact3Handle parent = {*c.registry(), c.get<Contact::Components::Parent>().parent};
+		if (static_cast<bool>(parent) && parent.all_of<Contact::Components::Self>()) {
+			self = Contact3Handle{*c.registry(), parent.get<Contact::Components::Self>().self};
+		}
+	}
+
+	if (!static_cast<bool>(self)) {
+		std::cerr << "TP2PRNG error: failed to look up self\n";
+		return false;
+	}
+
+	auto self_secret_it = rng_state->secrets.find(self);
+	if (self_secret_it == rng_state->secrets.cend()) {
+		// hmmmmmmmmmm this bad
+		std::cerr << "hmmmmmmmmmm this bad\n";
+		return false;
+	}
+
+	// TODO: queue these instead
+	// SEND secret to c
+	send_secret(c, id, ByteSpan{self_secret_it->second});
+
+	return true;
+}
+
+static std::tuple<std::vector<uint8_t>, const Contact::Components::ToxFriendEphemeral*, const Contact::Components::ToxGroupPeerEphemeral*> prepSendPkgWithID(Contact3Handle c, ToxP2PRNG::PKG pkg_type, ByteSpan id) {
+	std::vector<uint8_t> pkg;
+
+	// determine friend or group (meh)
+	const auto* tfe = c.try_get<Contact::Components::ToxFriendEphemeral>();
+	const auto* tgpe = c.try_get<Contact::Components::ToxGroupPeerEphemeral>();
+	if (tfe != nullptr) {
+		pkg.push_back(TOX_PKG_ID_FRIEND);
+	} else if (tgpe != nullptr) {
+		pkg.push_back(TOX_PKG_ID_GROUP);
+	} else {
+		return {};
+	}
+	pkg.push_back(static_cast<uint8_t>(pkg_type));
+
+	// pack packet
+	//   - id
+	pkg.insert(pkg.cend(), id.cbegin(), id.cend());
+
+	return {pkg, tfe, tgpe};
+}
+
+static bool sendToxPrivatePacket(
+	ToxI& t,
+	const Contact::Components::ToxFriendEphemeral* tfe,
+	const Contact::Components::ToxGroupPeerEphemeral* tgpe,
+	const std::vector<uint8_t>& pkg
+) {
+	// send to friend or group peer
+	if (tfe != nullptr) {
+		return
+			t.toxFriendSendLosslessPacket(
+				tfe->friend_number,
+				pkg
+			) == TOX_ERR_FRIEND_CUSTOM_PACKET_OK
+		;
+	} else if (tgpe != nullptr) {
+		return
+			t.toxGroupSendCustomPrivatePacket(
+				tgpe->group_number, tgpe->peer_number,
+				true,
+				pkg
+			) == TOX_ERR_GROUP_SEND_CUSTOM_PRIVATE_PACKET_OK
+		;
+	}
+
+	return false;
+}
+
+bool ToxP2PRNG::send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac) {
+	auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::HMAC, id);
+	if (pkg.empty()) {
+		return false;
+	}
+
+	//   - hmac
+	pkg.insert(pkg.cend(), hmac.cbegin(), hmac.cend());
+
+	return false;
+}
+
+bool ToxP2PRNG::send_hmac_request(Contact3Handle c, ByteSpan id) {
+	auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::HMAC_REQUEST, id);
+	if (pkg.empty()) {
+		return false;
+	}
+
+	return sendToxPrivatePacket(_t, tfe, tgpe, pkg);
+}
+
+bool ToxP2PRNG::send_secret(Contact3Handle c, ByteSpan id, const ByteSpan secret) {
+	auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::SECRET, id);
+	if (pkg.empty()) {
+		return false;
+	}
+
+	//   - secret (msg+k)
+	pkg.insert(pkg.cend(), secret.cbegin(), secret.cend());
+
+	return sendToxPrivatePacket(_t, tfe, tgpe, pkg);
+}
+
+bool ToxP2PRNG::send_secret_request(Contact3Handle c, ByteSpan id) {
+	auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::SECRET_REQUEST, id);
+	if (pkg.empty()) {
+		return false;
+	}
+
+	return sendToxPrivatePacket(_t, tfe, tgpe, pkg);
 }
 
 ToxP2PRNG::RngState* ToxP2PRNG::getRngSate(Contact3Handle c, ByteSpan id_bytes) {
@@ -293,7 +454,7 @@ bool ToxP2PRNG::onToxEvent(const Tox_Event_Friend_Lossless_Packet* e) {
 	const uint8_t* data = tox_event_friend_lossless_packet_get_data(e);
 	const auto data_length = tox_event_friend_lossless_packet_get_data_length(e);
 
-	return handleFriendPacket(friend_number, data, data_length);
+	return handleFriendPacket(friend_number, {data, data_length});
 }
 
 bool ToxP2PRNG::onToxEvent(const Tox_Event_Group_Custom_Packet* e) {
@@ -302,7 +463,7 @@ bool ToxP2PRNG::onToxEvent(const Tox_Event_Group_Custom_Packet* e) {
 	const uint8_t* data = tox_event_group_custom_packet_get_data(e);
 	const auto data_length = tox_event_group_custom_packet_get_data_length(e);
 
-	return handleGroupPacket(group_number, peer_number, data, data_length, false);
+	return handleGroupPacket(group_number, peer_number, {data, data_length}, false);
 }
 
 bool ToxP2PRNG::onToxEvent(const Tox_Event_Group_Custom_Private_Packet* e) {
@@ -311,6 +472,6 @@ bool ToxP2PRNG::onToxEvent(const Tox_Event_Group_Custom_Private_Packet* e) {
 	const uint8_t* data = tox_event_group_custom_private_packet_get_data(e);
 	const auto data_length = tox_event_group_custom_private_packet_get_data_length(e);
 
-	return handleGroupPacket(group_number, peer_number, data, data_length, true);
+	return handleGroupPacket(group_number, peer_number, {data, data_length}, true);
 }
 

src/solanaceae/tox_p2prng/tox_p2prng.hpp

@@ -19,6 +19,7 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
 	ToxEventProviderI& _tep;
 	ToxContactModel2& _tcm;
 
+	public:
 		enum class PKG : uint8_t {
 			INVALID = 0u,
 
@@ -32,6 +33,7 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
 		using ID = std::array<uint8_t, 32>;
 		struct IDHash {size_t operator()(const ID& a) const {return (a[0] | a[1] << 1*8 | a[2] << 1*16 | a[3] << 1*24) ^ (a[31] | a[30] << 1*8);}};
 
+	private:
 		struct RngState {
 			// all contacts participating, including self
 			std::vector<Contact3Handle> contacts;
@@ -53,6 +55,8 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
 			void genFinalResult(void);
 
 			std::vector<uint8_t> final_result; // cached
+
+			P2PRNG::State getState(void) const;
 		};
 		entt::dense_map<ID, RngState, IDHash> _global_map;
 
@@ -75,28 +79,31 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
 		bool handlePacket(
 			Contact3Handle c,
 			PKG pkg_type,
-			const uint8_t* data,
+			ByteSpan data
-			const size_t data_size
 		);
 		bool handleFriendPacket(
 			const uint32_t friend_number,
-			const uint8_t* data,
+			ByteSpan data
-			const size_t data_size
 		);
 
 		bool handleGroupPacket(
 			const uint32_t group_number,
 			const uint32_t peer_number,
-			const uint8_t* data,
+			ByteSpan data,
-			const size_t data_size,
 			const bool _private
 		);
 
-		bool handle_init_with_hmac(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
+		bool handle_init_with_hmac(Contact3Handle c, ByteSpan id, ByteSpan data);
-		bool handle_hmac(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
+		bool handle_hmac(Contact3Handle c, ByteSpan id, ByteSpan data);
-		bool handle_hmac_request(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
+		bool handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data);
-		bool handle_secret(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
+		bool handle_secret(Contact3Handle c, ByteSpan id, ByteSpan data);
-		bool handle_secret_request(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
+		bool handle_secret_request(Contact3Handle c, ByteSpan id, ByteSpan data);
+
+		//bool send_init_with_hmac(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
+		bool send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac);
+		bool send_hmac_request(Contact3Handle c, ByteSpan id);
+		bool send_secret(Contact3Handle c, ByteSpan id, const ByteSpan secret);
+		bool send_secret_request(Contact3Handle c, ByteSpan id);
 
 		RngState* getRngSate(Contact3Handle c, ByteSpan id);