sys_net: improvements

sys_net: implement reusable addr for p2p sockets
sys_net: implement getpeername for P2PS
sys_net: sockets inherit NBIO from their parent

rpcs3/Emu/Cell/Modules/sceNp.cpp

@@ -1272,7 +1272,7 @@ error_code sceNpBasicAddFriend(vm::cptr<SceNpId> contact, vm::cptr<char> body, s
 
 error_code sceNpBasicGetFriendListEntryCount(vm::ptr<u32> count)
 {
-	sceNp.warning("sceNpBasicGetFriendListEntryCount(count=*0x%x)", count);
+	sceNp.trace("sceNpBasicGetFriendListEntryCount(count=*0x%x)", count);
 
 	auto& nph = g_fxo->get<named_thread<np::np_handler>>();
 
@@ -1299,7 +1299,7 @@ error_code sceNpBasicGetFriendListEntryCount(vm::ptr<u32> count)
 
 error_code sceNpBasicGetFriendListEntry(u32 index, vm::ptr<SceNpId> npid)
 {
-	sceNp.warning("sceNpBasicGetFriendListEntry(index=%d, npid=*0x%x)", index, npid);
+	sceNp.trace("sceNpBasicGetFriendListEntry(index=%d, npid=*0x%x)", index, npid);
 
 	auto& nph = g_fxo->get<named_thread<np::np_handler>>();
 

rpcs3/Emu/Cell/lv2/sys_net/lv2_socket.h

@@ -48,6 +48,12 @@ public:
 		sys_net_linger linger;
 	};
 
+	struct sockopt_cache
+	{
+		sockopt_data data{};
+		s32 len = 0;
+	};
+
 public:
 	SAVESTATE_INIT_POS(7); // Dependency on RPCN
 
@@ -114,7 +120,7 @@ protected:
 	lv2_socket(utils::serial&, bool);
 
 	shared_mutex mutex;
-	u32 lv2_id = 0;
+	s32 lv2_id = 0;
 
 	socket_type socket = 0;
 

rpcs3/Emu/Cell/lv2/sys_net/lv2_socket_native.cpp

@@ -107,6 +107,9 @@ std::tuple<bool, s32, std::shared_ptr<lv2_socket>, sys_net_sockaddr> lv2_socket_
 		auto newsock = std::make_shared<lv2_socket_native>(family, type, protocol);
 		newsock->set_socket(native_socket, family, type, protocol);
 
+		// Sockets inherit non blocking behaviour from their parent
+		newsock->so_nbio = so_nbio;
+
 		sys_net_sockaddr ps3_addr = native_addr_to_sys_net_addr(native_addr);
 
 		return {true, 0, std::move(newsock), ps3_addr};

rpcs3/Emu/Cell/lv2/sys_net/lv2_socket_p2p.cpp

@@ -14,7 +14,7 @@ lv2_socket_p2p::lv2_socket_p2p(lv2_socket_family family, lv2_socket_type type, l
 lv2_socket_p2p::lv2_socket_p2p(utils::serial& ar, lv2_socket_type type)
 	: lv2_socket(ar, type)
 {
-	ar(port, vport);
+	ar(port, vport, bound_addr);
 
 	std::deque<std::pair<sys_net_sockaddr_in_p2p, std::vector<u8>>> data_dequeue{ar};
 
@@ -29,7 +29,7 @@ lv2_socket_p2p::lv2_socket_p2p(utils::serial& ar, lv2_socket_type type)
 void lv2_socket_p2p::save(utils::serial& ar)
 {
 	static_cast<lv2_socket*>(this)->save(ar, true);
-	ar(port, vport);
+	ar(port, vport, bound_addr);
 
 	std::deque<std::pair<sys_net_sockaddr_in_p2p, std::vector<u8>>> data_dequeue;
 
@@ -140,15 +140,22 @@ s32 lv2_socket_p2p::bind(const sys_net_sockaddr& addr)
 					p2p_vport++;
 				}
 			}
-			else
+			else if (pport.bound_p2p_vports.contains(p2p_vport))
 			{
-				if (pport.bound_p2p_vports.contains(p2p_vport))
+				// Check that all other sockets are SO_REUSEADDR or SO_REUSEPORT
+				auto& bound_sockets = ::at32(pport.bound_p2p_vports, p2p_vport);
+				if (!sys_net_helpers::all_reusable(bound_sockets))
 				{
 					return -SYS_NET_EADDRINUSE;
 				}
-			}
 
-			pport.bound_p2p_vports.insert(std::make_pair(p2p_vport, lv2_id));
+				bound_sockets.insert(lv2_id);
+			}
+			else
+			{
+				std::set<s32> bound_ports{lv2_id};
+				pport.bound_p2p_vports.insert(std::make_pair(p2p_vport, std::move(bound_ports)));
+			}
 		}
 	}
 
@@ -157,7 +164,7 @@ s32 lv2_socket_p2p::bind(const sys_net_sockaddr& addr)
 		port       = p2p_port;
 		vport      = p2p_vport;
 		socket     = real_socket;
-		last_bound_addr = addr;
+		bound_addr = psa_in_p2p->sin_addr;
 	}
 
 	return CELL_OK;
@@ -185,15 +192,26 @@ std::pair<s32, sys_net_sockaddr> lv2_socket_p2p::getsockname()
 	return {CELL_OK, sn_addr};
 }
 
-std::tuple<s32, lv2_socket::sockopt_data, u32> lv2_socket_p2p::getsockopt([[maybe_unused]] s32 level, [[maybe_unused]] s32 optname, [[maybe_unused]] u32 len)
+std::tuple<s32, lv2_socket::sockopt_data, u32> lv2_socket_p2p::getsockopt(s32 level, s32 optname, u32 len)
 {
-	// TODO
+	std::lock_guard lock(mutex);
+
+	const u64 key = (static_cast<u64>(level) << 32) | static_cast<u64>(optname);
+
+	if (!sockopts.contains(key))
+	{
+		sys_net.error("Unhandled getsockopt(level=%d, optname=%d, len=%d)", level, optname, len);
 		return {};
 	}
 
+	const auto& cache = ::at32(sockopts, key);
+	return {CELL_OK, cache.data, cache.len};
+}
+
 s32 lv2_socket_p2p::setsockopt(s32 level, s32 optname, const std::vector<u8>& optval)
 {
-	// TODO
+	std::lock_guard lock(mutex);
+
 	int native_int = *reinterpret_cast<const be_t<s32>*>(optval.data());
 
 	if (level == SYS_NET_SOL_SOCKET && optname == SYS_NET_SO_NBIO)
@@ -201,7 +219,14 @@ s32 lv2_socket_p2p::setsockopt(s32 level, s32 optname, const std::vector<u8>& op
 		so_nbio = native_int;
 	}
 
-	return {};
+	const u64 key = (static_cast<u64>(level) << 32) | static_cast<u64>(optname);
+	sockopt_cache cache{};
+	memcpy(&cache.data._int, optval.data(), optval.size());
+	cache.len = optval.size();
+
+	sockopts[key] = std::move(cache);
+
+	return CELL_OK;
 }
 
 std::optional<std::tuple<s32, std::vector<u8>, sys_net_sockaddr>> lv2_socket_p2p::recvfrom(s32 flags, u32 len, bool is_lock)
@@ -258,10 +283,12 @@ std::optional<s32> lv2_socket_p2p::sendto(s32 flags, const std::vector<u8>& buf,
 	inet_ntop(AF_INET, &native_addr.sin_addr, ip_str, sizeof(ip_str));
 	sys_net.trace("[P2P] Sending a packet to %s:%d:%d", ip_str, p2p_port, p2p_vport);
 
-	std::vector<u8> p2p_data(buf.size() + sizeof(u16));
+	std::vector<u8> p2p_data(buf.size() + VPORT_P2P_HEADER_SIZE);
 	const le_t<u16> p2p_vport_le = p2p_vport;
+	const le_t<u16> p2p_flags_le = P2P_FLAG_P2P;
 	memcpy(p2p_data.data(), &p2p_vport_le, sizeof(u16));
-	memcpy(p2p_data.data() + sizeof(u16), buf.data(), buf.size());
+	memcpy(p2p_data.data() + sizeof(u16), &p2p_flags_le, sizeof(u16));
+	memcpy(p2p_data.data() + VPORT_P2P_HEADER_SIZE, buf.data(), buf.size());
 
 	int native_flags = 0;
 	if (flags & SYS_NET_MSG_WAITALL)
@@ -307,10 +334,21 @@ void lv2_socket_p2p::close()
 		auto& p2p_port = ::at32(nc.list_p2p_ports, port);
 		{
 			std::lock_guard lock(p2p_port.bound_p2p_vports_mutex);
+			if (!p2p_port.bound_p2p_vports.contains(vport))
+			{
+				return;
+			}
+
+			auto& bound_sockets = ::at32(p2p_port.bound_p2p_vports, vport);
+			bound_sockets.erase(lv2_id);
+
+			if (bound_sockets.empty())
+			{
 				p2p_port.bound_p2p_vports.erase(vport);
 			}
 		}
 	}
+}
 
 s32 lv2_socket_p2p::shutdown([[maybe_unused]] s32 how)
 {

rpcs3/Emu/Cell/lv2/sys_net/lv2_socket_p2p.h

@@ -41,4 +41,6 @@ protected:
 	u32 bound_addr = 0;
 	// Queue containing received packets from network_thread for SYS_NET_SOCK_DGRAM_P2P sockets
 	std::queue<std::pair<sys_net_sockaddr_in_p2p, std::vector<u8>>> data{};
+	// List of sock options
+	std::map<u64, sockopt_cache> sockopts;
 };

rpcs3/Emu/Cell/lv2/sys_net/lv2_socket_p2ps.cpp

@@ -184,7 +184,7 @@ void initialize_tcp_timeout_monitor()
 	g_fxo->need<named_thread<tcp_timeout_monitor>>();
 }
 
-u16 u2s_tcp_checksum(const u16* buffer, usz size)
+u16 u2s_tcp_checksum(const le_t<u16>* buffer, usz size)
 {
 	u32 cksum = 0;
 	while (size > 1)
@@ -202,20 +202,22 @@ u16 u2s_tcp_checksum(const u16* buffer, usz size)
 
 std::vector<u8> generate_u2s_packet(const p2ps_encapsulated_tcp& header, const u8* data, const u32 datasize)
 {
-	const u32 packet_size = (sizeof(u16) + sizeof(p2ps_encapsulated_tcp) + datasize);
+	const u32 packet_size = (VPORT_P2P_HEADER_SIZE + sizeof(p2ps_encapsulated_tcp) + datasize);
 	ensure(packet_size < 65535); // packet size shouldn't be bigger than possible UDP payload
 	std::vector<u8> packet(packet_size);
 	u8* packet_data        = packet.data();
 	le_t<u16> dst_port_le  = +header.dst_port;
+	le_t<u16> p2p_flags_le = P2P_FLAG_P2PS;
 
 	memcpy(packet_data, &dst_port_le, sizeof(u16));
-	memcpy(packet_data + sizeof(u16), &header, sizeof(p2ps_encapsulated_tcp));
+	memcpy(packet_data + sizeof(u16), &p2p_flags_le, sizeof(u16));
+	memcpy(packet_data + VPORT_P2P_HEADER_SIZE, &header, sizeof(p2ps_encapsulated_tcp));
 	if (datasize)
-		memcpy(packet_data + sizeof(u16) + sizeof(p2ps_encapsulated_tcp), data, datasize);
+		memcpy(packet_data + VPORT_P2P_HEADER_SIZE + sizeof(p2ps_encapsulated_tcp), data, datasize);
 
-	auto* hdr_ptr     = reinterpret_cast<p2ps_encapsulated_tcp*>(packet_data + sizeof(u16));
+	auto* hdr_ptr     = reinterpret_cast<p2ps_encapsulated_tcp*>(packet_data + VPORT_P2P_HEADER_SIZE);
 	hdr_ptr->checksum = 0;
-	hdr_ptr->checksum = u2s_tcp_checksum(utils::bless<u16>(hdr_ptr), sizeof(p2ps_encapsulated_tcp) + datasize);
+	hdr_ptr->checksum = u2s_tcp_checksum(utils::bless<le_t<u16>>(hdr_ptr), sizeof(p2ps_encapsulated_tcp) + datasize);
 
 	return packet;
 }
@@ -225,7 +227,7 @@ lv2_socket_p2ps::lv2_socket_p2ps(lv2_socket_family family, lv2_socket_type type,
 {
 }
 
-lv2_socket_p2ps::lv2_socket_p2ps(socket_type socket, u16 port, u16 vport, u32 op_addr, u16 op_port, u16 op_vport, u64 cur_seq, u64 data_beg_seq)
+lv2_socket_p2ps::lv2_socket_p2ps(socket_type socket, u16 port, u16 vport, u32 op_addr, u16 op_port, u16 op_vport, u64 cur_seq, u64 data_beg_seq, s32 so_nbio)
 	: lv2_socket_p2p(SYS_NET_AF_INET, SYS_NET_SOCK_STREAM_P2P, SYS_NET_IPPROTO_IP)
 {
 	this->socket       = socket;
@@ -236,6 +238,7 @@ lv2_socket_p2ps::lv2_socket_p2ps(socket_type socket, u16 port, u16 vport, u32 op
 	this->op_vport     = op_vport;
 	this->cur_seq      = cur_seq;
 	this->data_beg_seq = data_beg_seq;
+	this->so_nbio      = so_nbio;
 	status             = p2ps_stream_status::stream_connected;
 }
 
@@ -410,7 +413,7 @@ bool lv2_socket_p2ps::handle_listening(p2ps_encapsulated_tcp* tcp_header, [[mayb
 		const u16 new_op_vport     = tcp_header->src_port;
 		const u64 new_cur_seq      = send_hdr.seq + 1;
 		const u64 new_data_beg_seq = send_hdr.ack;
-		auto sock_lv2              = std::make_shared<lv2_socket_p2ps>(socket, port, vport, new_op_addr, new_op_port, new_op_vport, new_cur_seq, new_data_beg_seq);
+		auto sock_lv2              = std::make_shared<lv2_socket_p2ps>(socket, port, vport, new_op_addr, new_op_port, new_op_vport, new_cur_seq, new_data_beg_seq, so_nbio);
 		const s32 new_sock_id      = idm::import_existing<lv2_socket>(sock_lv2);
 		sock_lv2->set_lv2_id(new_sock_id);
 		const u64 key_connected = (reinterpret_cast<struct sockaddr_in*>(op_addr)->sin_addr.s_addr) | (static_cast<u64>(tcp_header->src_port) << 48) | (static_cast<u64>(tcp_header->dst_port) << 32);
@@ -494,6 +497,27 @@ void lv2_socket_p2ps::set_status(p2ps_stream_status new_status)
 	status = new_status;
 }
 
+std::pair<s32, sys_net_sockaddr> lv2_socket_p2ps::getpeername()
+{
+	std::lock_guard lock(mutex);
+
+	if (!op_addr || !op_port || !op_vport)
+	{
+		return {-SYS_NET_ENOTCONN, {}};
+	}
+
+	sys_net_sockaddr res{};
+	sys_net_sockaddr_in_p2p* p2p_addr = reinterpret_cast<sys_net_sockaddr_in_p2p*>(&res);
+
+	p2p_addr->sin_len = sizeof(sys_net_sockaddr_in_p2p);
+	p2p_addr->sin_family = SYS_NET_AF_INET;
+	p2p_addr->sin_addr = std::bit_cast<be_t<u32>, u32>(op_addr);
+	p2p_addr->sin_port = op_vport;
+	p2p_addr->sin_vport = op_port;
+
+	return {CELL_OK, res};
+}
+
 std::tuple<bool, s32, std::shared_ptr<lv2_socket>, sys_net_sockaddr> lv2_socket_p2ps::accept(bool is_lock)
 {
 	std::unique_lock<shared_mutex> lock(mutex, std::defer_lock);
@@ -572,26 +596,36 @@ s32 lv2_socket_p2ps::bind(const sys_net_sockaddr& addr)
 			if (p2p_vport == 0)
 			{
 				p2p_vport = 30000;
-				while (pport.bound_p2p_streams.contains((static_cast<u64>(p2p_vport) << 32)))
+				while (pport.bound_p2ps_vports.contains(p2p_vport))
 				{
 					p2p_vport++;
 				}
-				pport.bound_p2p_streams.emplace((static_cast<u64>(p2p_vport) << 32), lv2_id);
+				std::set<s32> bound_ports{lv2_id};
+				pport.bound_p2ps_vports.insert(std::make_pair(p2p_vport, std::move(bound_ports)));
 			}
 			else
 			{
-				const u64 key = (static_cast<u64>(p2p_vport) << 32);
+				if (pport.bound_p2ps_vports.contains(p2p_vport))
-				if (pport.bound_p2p_streams.contains(key))
+				{
+					auto& bound_sockets = ::at32(pport.bound_p2ps_vports, p2p_vport);
+					if (!sys_net_helpers::all_reusable(bound_sockets))
 					{
 						return -SYS_NET_EADDRINUSE;
 					}
-				pport.bound_p2p_streams.emplace(key, lv2_id);
+
+					bound_sockets.insert(lv2_id);
+				}
+				else
+				{
+					std::set<s32> bound_ports{lv2_id};
+					pport.bound_p2ps_vports.insert(std::make_pair(p2p_vport, std::move(bound_ports)));
+				}
 			}
 
 			port       = p2p_port;
 			vport      = p2p_vport;
 			socket     = real_socket;
-			last_bound_addr = addr;
+			bound_addr = psa_in_p2p->sin_addr;
 		}
 	}
 
@@ -817,13 +851,24 @@ void lv2_socket_p2ps::close()
 			std::lock_guard lock(p2p_port.bound_p2p_vports_mutex);
 			for (auto it = p2p_port.bound_p2p_streams.begin(); it != p2p_port.bound_p2p_streams.end();)
 			{
-				if (static_cast<u32>(it->second) == lv2_id)
+				if (it->second == lv2_id)
 				{
 					it = p2p_port.bound_p2p_streams.erase(it);
 					continue;
 				}
 				it++;
 			}
+
+			if (p2p_port.bound_p2ps_vports.contains(vport))
+			{
+				auto& bound_ports = ::at32(p2p_port.bound_p2ps_vports, vport);
+				bound_ports.erase(lv2_id);
+
+				if (bound_ports.empty())
+				{
+					p2p_port.bound_p2ps_vports.erase(vport);
+				}
+			}
 		}
 	}
 }

rpcs3/Emu/Cell/lv2/sys_net/lv2_socket_p2ps.h

@@ -51,14 +51,14 @@ enum p2ps_tcp_flags : u8
 };
 
 void initialize_tcp_timeout_monitor();
-u16 u2s_tcp_checksum(const u16* buffer, usz size);
+u16 u2s_tcp_checksum(const le_t<u16>* buffer, usz size);
 std::vector<u8> generate_u2s_packet(const p2ps_encapsulated_tcp& header, const u8* data, const u32 datasize);
 
 class lv2_socket_p2ps final : public lv2_socket_p2p
 {
 public:
 	lv2_socket_p2ps(lv2_socket_family family, lv2_socket_type type, lv2_ip_protocol protocol);
-	lv2_socket_p2ps(socket_type socket, u16 port, u16 vport, u32 op_addr, u16 op_port, u16 op_vport, u64 cur_seq, u64 data_beg_seq);
+	lv2_socket_p2ps(socket_type socket, u16 port, u16 vport, u32 op_addr, u16 op_port, u16 op_vport, u64 cur_seq, u64 data_beg_seq, s32 so_nbio);
 	lv2_socket_p2ps(utils::serial& ar, lv2_socket_type type);
 	void save(utils::serial& ar);
 
@@ -73,6 +73,7 @@ public:
 
 	std::optional<s32> connect(const sys_net_sockaddr& addr) override;
 
+	std::pair<s32, sys_net_sockaddr> getpeername() override;
 	std::pair<s32, sys_net_sockaddr> getsockname() override;
 
 	s32 listen(s32 backlog) override;

rpcs3/Emu/Cell/lv2/sys_net/nt_p2p_port.cpp

@@ -13,6 +13,33 @@
 
 LOG_CHANNEL(sys_net);
 
+namespace sys_net_helpers
+{
+	bool all_reusable(const std::set<s32>& sock_ids)
+	{
+		for (const s32 sock_id : sock_ids)
+		{
+			const auto [_, reusable] = idm::check<lv2_socket>(sock_id, [&](lv2_socket& sock) -> bool
+				{
+					auto [res_reuseaddr, optval_reuseaddr, optlen_reuseaddr] = sock.getsockopt(SYS_NET_SOL_SOCKET, SYS_NET_SO_REUSEADDR, sizeof(s32));
+					auto [res_reuseport, optval_reuseport, optlen_reuseport] = sock.getsockopt(SYS_NET_SOL_SOCKET, SYS_NET_SO_REUSEPORT, sizeof(s32));
+
+					const bool reuse_addr = optlen_reuseaddr == 4 && !!optval_reuseaddr._int;
+					const bool reuse_port = optlen_reuseport == 4 && !!optval_reuseport._int;
+
+					return (reuse_addr || reuse_port);
+				});
+
+			if (!reusable)
+			{
+				return false;
+			}
+		}
+
+		return true;
+	}
+} // namespace sys_net_helpers
+
 nt_p2p_port::nt_p2p_port(u16 port)
 	: port(port)
 {
@@ -164,6 +191,16 @@ bool nt_p2p_port::recv_data()
 		}
 	}
 
+	if (recv_res < VPORT_P2P_HEADER_SIZE)
+	{
+		return true;
+	}
+
+	const u16 vport_flags = *reinterpret_cast<le_t<u16>*>(p2p_recv_data.data() + sizeof(u16));
+	std::vector<u8> p2p_data(recv_res - VPORT_P2P_HEADER_SIZE);
+	memcpy(p2p_data.data(), p2p_recv_data.data() + VPORT_P2P_HEADER_SIZE, p2p_data.size());
+
+	if (vport_flags & P2P_FLAG_P2P)
 	{
 		std::lock_guard lock(bound_p2p_vports_mutex);
 		if (bound_p2p_vports.contains(dst_vport))
@@ -176,37 +213,41 @@ bool nt_p2p_port::recv_data()
 			p2p_addr.sin_vport  = dst_vport;
 			p2p_addr.sin_port   = std::bit_cast<be_t<u16>, u16>(reinterpret_cast<struct sockaddr_in*>(&native_addr)->sin_port);
 
-			std::vector<u8> p2p_data(recv_res - sizeof(u16));
+			auto& bound_sockets = ::at32(bound_p2p_vports, dst_vport);
-			memcpy(p2p_data.data(), p2p_recv_data.data() + sizeof(u16), recv_res - sizeof(u16));
 
-			const auto sock = idm::check<lv2_socket>(::at32(bound_p2p_vports, dst_vport), [&](lv2_socket& sock)
+			for (const auto sock_id : bound_sockets)
+			{
+				const auto sock = idm::check<lv2_socket>(sock_id, [&](lv2_socket& sock)
 					{
 						ensure(sock.get_type() == SYS_NET_SOCK_DGRAM_P2P);
 						auto& sock_p2p = reinterpret_cast<lv2_socket_p2p&>(sock);
 
-					sock_p2p.handle_new_data(std::move(p2p_addr), std::move(p2p_data));
+						sock_p2p.handle_new_data(p2p_addr, p2p_data);
 					});
 
-			// Should not happen in theory
 				if (!sock)
+				{
+					sys_net.error("Socket %d found in bound_p2p_vports didn't exist!", sock_id);
+					bound_sockets.erase(sock_id);
+					if (bound_sockets.empty())
+					{
 						bound_p2p_vports.erase(dst_vport);
+					}
+				}
+			}
 
 			return true;
 		}
 	}
-
+	else if (vport_flags & P2P_FLAG_P2PS)
-	// Not directed at a bound DGRAM_P2P vport so check if the packet is a STREAM-P2P packet
+	{
-
+		if (p2p_data.size() < sizeof(p2ps_encapsulated_tcp))
-	const auto sp_size = recv_res - sizeof(u16);
-	u8* sp_data        = p2p_recv_data.data() + sizeof(u16);
-
-	if (sp_size < sizeof(p2ps_encapsulated_tcp))
 		{
 			sys_net.notice("Received P2P packet targeted at unbound vport(likely) or invalid(vport=%d)", dst_vport);
 			return true;
 		}
 
-	auto* tcp_header = reinterpret_cast<p2ps_encapsulated_tcp*>(sp_data);
+		auto* tcp_header = reinterpret_cast<p2ps_encapsulated_tcp*>(p2p_data.data());
 
 		// Validate signature & length
 		if (tcp_header->signature != P2PS_U2S_SIG)
@@ -215,7 +256,7 @@ bool nt_p2p_port::recv_data()
 			return true;
 		}
 
-	if (tcp_header->length != (sp_size - sizeof(p2ps_encapsulated_tcp)))
+		if (tcp_header->length != (p2p_data.size() - sizeof(p2ps_encapsulated_tcp)))
 		{
 			sys_net.error("Received STREAM-P2P packet tcp length didn't match packet length");
 			return true;
@@ -231,7 +272,7 @@ bool nt_p2p_port::recv_data()
 		// Validate checksum
 		u16 given_checksum   = tcp_header->checksum;
 		tcp_header->checksum = 0;
-	if (given_checksum != u2s_tcp_checksum(reinterpret_cast<const u16*>(sp_data), sp_size))
+		if (given_checksum != u2s_tcp_checksum(reinterpret_cast<const le_t<u16>*>(p2p_data.data()), p2p_data.size()))
 		{
 			sys_net.error("Checksum is invalid, dropping packet!");
 			return true;
@@ -239,7 +280,6 @@ bool nt_p2p_port::recv_data()
 
 		// The packet is valid, check if it's bound
 		const u64 key_connected = (reinterpret_cast<struct sockaddr_in*>(&native_addr)->sin_addr.s_addr) | (static_cast<u64>(tcp_header->src_port) << 48) | (static_cast<u64>(tcp_header->dst_port) << 32);
-	const u64 key_listening = (static_cast<u64>(tcp_header->dst_port) << 32);
 
 		{
 			std::lock_guard lock(bound_p2p_vports_mutex);
@@ -247,18 +287,23 @@ bool nt_p2p_port::recv_data()
 			{
 				const auto sock_id = ::at32(bound_p2p_streams, key_connected);
 				sys_net.trace("Received packet for connected STREAM-P2P socket(s=%d)", sock_id);
-			handle_connected(sock_id, tcp_header, sp_data + sizeof(p2ps_encapsulated_tcp), &native_addr);
+				handle_connected(sock_id, tcp_header, p2p_data.data() + sizeof(p2ps_encapsulated_tcp), &native_addr);
 				return true;
 			}
 
-		if (bound_p2p_streams.contains(key_listening))
+			if (bound_p2ps_vports.contains(tcp_header->dst_port))
+			{
+				const auto& bound_sockets = ::at32(bound_p2ps_vports, tcp_header->dst_port);
+
+				for (const auto sock_id : bound_sockets)
 				{
-			const auto sock_id = ::at32(bound_p2p_streams, key_listening);
 					sys_net.trace("Received packet for listening STREAM-P2P socket(s=%d)", sock_id);
-			handle_listening(sock_id, tcp_header, sp_data + sizeof(p2ps_encapsulated_tcp), &native_addr);
+					handle_listening(sock_id, tcp_header, p2p_data.data() + sizeof(p2ps_encapsulated_tcp), &native_addr);
+				}
 				return true;
 			}
 		}
+	}
 
 	sys_net.notice("Received a STREAM-P2P packet with no bound target");
 	return true;

rpcs3/Emu/Cell/lv2/sys_net/nt_p2p_port.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <set>
+
 #include "lv2_socket_p2ps.h"
 
 #ifdef _WIN32
@@ -18,6 +20,14 @@
 #endif
 #endif
 
+constexpr s32 VPORT_P2P_HEADER_SIZE = sizeof(u16) + sizeof(u16);
+
+enum VPORT_P2P_FLAGS
+{
+	P2P_FLAG_P2P  = 1,
+	P2P_FLAG_P2PS = 1 << 1,
+};
+
 struct signaling_message
 {
 	u32 src_addr = 0;
@@ -26,6 +36,11 @@ struct signaling_message
 	std::vector<u8> data;
 };
 
+namespace sys_net_helpers
+{
+	bool all_reusable(const std::set<s32>& sock_ids);
+}
+
 struct nt_p2p_port
 {
 	// Real socket where P2P packets are received/sent
@@ -33,9 +48,11 @@ struct nt_p2p_port
 	u16 port               = 0;
 
 	shared_mutex bound_p2p_vports_mutex;
-	// For DGRAM_P2P sockets(vport, sock_id)
+	// For DGRAM_P2P sockets (vport, sock_ids)
-	std::map<u16, s32> bound_p2p_vports{};
+	std::map<u16, std::set<s32>> bound_p2p_vports{};
-	// For STREAM_P2P sockets(key, sock_id)
+	// For STREAM_P2P sockets (vport, sock_ids)
+	std::map<u16, std::set<s32>> bound_p2ps_vports{};
+	// List of active(either from a connect or an accept) P2PS sockets (key, sock_id)
 	// key is ( (src_vport) << 48 | (dst_vport) << 32 | addr ) with src_vport and addr being 0 for listening sockets
 	std::map<u64, s32> bound_p2p_streams{};
 

rpcs3/Emu/NP/rpcn_client.cpp

@@ -71,7 +71,7 @@ namespace rpcn
 		return get_localized_string(rpcn_state_to_localized_string_id(state));
 	}
 
-	constexpr u32 RPCN_PROTOCOL_VERSION = 17;
+	constexpr u32 RPCN_PROTOCOL_VERSION = 18;
 	constexpr usz RPCN_HEADER_SIZE      = 15;
 	constexpr usz COMMUNICATION_ID_SIZE = 9;