#ifndef BLANK_NET_PACKET_HPP_
#define BLANK_NET_PACKET_HPP_
+#include "../graphics/glm.hpp"
+
#include <cstdint>
+#include <ostream>
#include <string>
+#include <SDL_net.h>
namespace blank {
+class Block;
+class Entity;
+class EntityState;
+
struct Packet {
static constexpr std::uint32_t TAG = 0xFB1AB1AF;
- enum Type {
- PING = 0,
- LOGIN = 1,
- };
+ static const char *Type2String(std::uint8_t) noexcept;
struct TControl {
std::uint16_t seq;
std::uint16_t ack;
std::uint32_t hist;
+
+ // true if this contains an ack for given (remote) seq
+ bool Acks(std::uint16_t) const noexcept;
+ std::uint16_t AckBegin() const noexcept { return ack; }
+ std::uint16_t AckEnd() const noexcept { return ack - std::uint16_t(33); }
};
struct Header {
std::uint32_t tag;
TControl ctrl;
std::uint8_t type;
+ std::uint8_t reserved1;
+ std::uint8_t reserved2;
+ std::uint8_t reserved3;
} header;
- std::uint8_t payload[500 - sizeof(Header)];
+ static constexpr std::size_t MAX_PAYLOAD_LEN = 500 - sizeof(Header);
+
+ std::uint8_t payload[MAX_PAYLOAD_LEN];
+
+
+ void Tag() noexcept { header.tag = TAG; }
+
+ void Type(std::uint8_t t) noexcept { header.type = t; }
+ std::uint8_t Type() const noexcept { return header.type; }
+ const char *TypeString() const noexcept { return Type2String(Type()); }
+
+
+ struct Payload {
+ std::size_t length;
+ std::uint8_t *data;
+
+ /// WARNING: do not use these if the data doesn not
+ /// point into a real packet's payload
+ const Packet &GetPacket() const noexcept {
+ return *reinterpret_cast<const Packet *>(data - sizeof(Header));
+ }
+ const Header &GetHeader() const noexcept {
+ return GetPacket().header;
+ }
+ std::uint16_t Seq() const noexcept {
+ return GetHeader().ctrl.seq;
+ }
+
+ template<class T>
+ void Write(const T &, size_t off) noexcept;
+ template<class T>
+ void Read(T &, size_t off) const noexcept;
+
+ void Write(const glm::quat &, size_t off) noexcept;
+ void Read(glm::quat &, size_t off) const noexcept;
+ void Write(const EntityState &, size_t off) noexcept;
+ void Read(EntityState &, size_t off) const noexcept;
+ void Write(const EntityState &, const glm::ivec3 &, size_t off) noexcept;
+ void Read(EntityState &, const glm::ivec3 &, size_t off) const noexcept;
+
+ void WriteString(const std::string &src, std::size_t off, std::size_t maxlen) noexcept;
+ void ReadString(std::string &dst, std::size_t off, std::size_t maxlen) const noexcept;
+
+ void WritePackB(const glm::ivec3 &, size_t off) noexcept;
+ void ReadPackB(glm::ivec3 &, size_t off) const noexcept;
+
+ void WritePackN(float, size_t off) noexcept;
+ void ReadPackN(float &, size_t off) const noexcept;
+ void WritePackN(const glm::vec3 &, size_t off) noexcept;
+ void ReadPackN(glm::vec3 &, size_t off) const noexcept;
+
+ void WritePackU(float, size_t off) noexcept;
+ void ReadPackU(float &, size_t off) const noexcept;
+ void WritePackU(const glm::vec3 &, size_t off) noexcept;
+ void ReadPackU(glm::vec3 &, size_t off) const noexcept;
+ };
+
+ struct Ping : public Payload {
+ static constexpr std::uint8_t TYPE = 0;
+ static constexpr std::size_t MAX_LEN = 0;
+ };
+
+ struct Login : public Payload {
+ static constexpr std::uint8_t TYPE = 1;
+ static constexpr std::size_t MAX_LEN = 32;
+
+ void WritePlayerName(const std::string &) noexcept;
+ void ReadPlayerName(std::string &) const noexcept;
+ };
+
+ struct Join : public Payload {
+ static constexpr std::uint8_t TYPE = 2;
+ static constexpr std::size_t MAX_LEN = 78;
+
+ void WritePlayer(const Entity &) noexcept;
+ void ReadPlayerID(std::uint32_t &) const noexcept;
+ void ReadPlayerState(EntityState &) const noexcept;
+ void WriteWorldName(const std::string &) noexcept;
+ void ReadWorldName(std::string &) const noexcept;
+ };
+
+ struct Part : public Payload {
+ static constexpr std::uint8_t TYPE = 3;
+ static constexpr std::size_t MAX_LEN = 0;
+ };
+
+ struct PlayerUpdate : public Payload {
+ static constexpr std::uint8_t TYPE = 4;
+ static constexpr std::size_t MAX_LEN = 50;
+
+ void WritePredictedState(const EntityState &) noexcept;
+ void ReadPredictedState(EntityState &) const noexcept;
+ void WriteMovement(const glm::vec3 &) noexcept;
+ void ReadMovement(glm::vec3 &) const noexcept;
+ void WriteActions(std::uint8_t) noexcept;
+ void ReadActions(std::uint8_t &) const noexcept;
+ void WriteSlot(std::uint8_t) noexcept;
+ void ReadSlot(std::uint8_t &) const noexcept;
+ };
+
+ struct SpawnEntity : public Payload {
+ static constexpr std::uint8_t TYPE = 5;
+ static constexpr std::size_t MAX_LEN = 110;
+
+ void WriteEntity(const Entity &) noexcept;
+ void ReadEntityID(std::uint32_t &) const noexcept;
+ void ReadModelID(std::uint32_t &) const noexcept;
+ void ReadEntity(Entity &) const noexcept;
+ };
+
+ struct DespawnEntity : public Payload {
+ static constexpr std::uint8_t TYPE = 6;
+ static constexpr std::size_t MAX_LEN = 4;
+
+ void WriteEntityID(std::uint32_t) noexcept;
+ void ReadEntityID(std::uint32_t &) const noexcept;
+ };
+
+ struct EntityUpdate : public Payload {
+ static constexpr std::uint8_t TYPE = 7;
+ static constexpr std::size_t MAX_LEN = 460;
+
+ static constexpr std::uint32_t MAX_ENTITIES = 12;
+ static constexpr std::size_t GetSize(std::uint32_t num) noexcept {
+ return 16 + (num * 37);
+ }
+
+ void WriteEntityCount(std::uint32_t) noexcept;
+ void ReadEntityCount(std::uint32_t &) const noexcept;
+ void WriteChunkBase(const glm::ivec3 &) noexcept;
+ void ReadChunkBase(glm::ivec3 &) const noexcept;
+
+ void WriteEntity(const Entity &, const glm::ivec3 &, std::uint32_t) noexcept;
+ void ReadEntityID(std::uint32_t &, std::uint32_t) const noexcept;
+ void ReadEntityState(EntityState &, const glm::ivec3 &, std::uint32_t) const noexcept;
+ };
+
+ struct PlayerCorrection : public Payload {
+ static constexpr std::uint8_t TYPE = 8;
+ static constexpr std::size_t MAX_LEN = 44;
+
+ void WritePacketSeq(std::uint16_t) noexcept;
+ void ReadPacketSeq(std::uint16_t &) const noexcept;
+ void WritePlayer(const Entity &) noexcept;
+ void ReadPlayerState(EntityState &) const noexcept;
+ };
+
+ struct ChunkBegin : public Payload {
+ static constexpr std::uint8_t TYPE = 9;
+ static constexpr std::size_t MAX_LEN = 24;
+
+ void WriteTransmissionId(std::uint32_t) noexcept;
+ void ReadTransmissionId(std::uint32_t &) const noexcept;
+ void WriteFlags(std::uint32_t) noexcept;
+ void ReadFlags(std::uint32_t &) const noexcept;
+ void WriteChunkCoords(const glm::ivec3 &) noexcept;
+ void ReadChunkCoords(glm::ivec3 &) const noexcept;
+ void WriteDataSize(std::uint32_t) noexcept;
+ void ReadDataSize(std::uint32_t &) const noexcept;
+ };
+
+ struct ChunkData : public Payload {
+ static constexpr std::uint8_t TYPE = 10;
+ static constexpr std::size_t MAX_LEN = MAX_PAYLOAD_LEN;
+ static constexpr std::size_t MAX_DATA_LEN = MAX_LEN - 12;
+
+ static constexpr std::size_t GetSize(std::size_t data_len) noexcept {
+ return data_len + 12;
+ }
+
+ void WriteTransmissionId(std::uint32_t) noexcept;
+ void ReadTransmissionId(std::uint32_t &) const noexcept;
+ void WriteDataOffset(std::uint32_t) noexcept;
+ void ReadDataOffset(std::uint32_t &) const noexcept;
+ void WriteDataSize(std::uint32_t) noexcept;
+ void ReadDataSize(std::uint32_t &) const noexcept;
+ void WriteData(const std::uint8_t *, std::size_t len) noexcept;
+ void ReadData(std::uint8_t *, std::size_t maxlen) const noexcept;
+ };
+
+ struct BlockUpdate : public Payload {
+ static constexpr std::uint8_t TYPE = 11;
+ static constexpr std::size_t MAX_LEN = 484;
+
+ static constexpr std::uint32_t MAX_BLOCKS = 78;
+ static constexpr std::size_t GetSize(std::uint32_t num) noexcept {
+ return 16 + (num * 6);
+ }
+
+ void WriteChunkCoords(const glm::ivec3 &) noexcept;
+ void ReadChunkCoords(glm::ivec3 &) const noexcept;
+ void WriteBlockCount(std::uint32_t) noexcept;
+ void ReadBlockCount(std::uint32_t &) const noexcept;
+
+ void WriteIndex(std::uint16_t, std::uint32_t) noexcept;
+ void ReadIndex(std::uint16_t &, std::uint32_t) const noexcept;
+ void WriteBlock(const Block &, std::uint32_t) noexcept;
+ void ReadBlock(Block &, std::uint32_t) const noexcept;
+ };
+
+ struct Message : public Payload {
+ static constexpr std::uint8_t TYPE = 12;
+ static constexpr std::size_t MAX_LEN = 455;
+
+ static constexpr std::size_t MAX_MESSAGE_LEN = 450;
+ static std::size_t GetSize(const std::string &msg) noexcept {
+ return 5 + std::min(msg.size() + 1, MAX_MESSAGE_LEN);
+ }
+
+ void WriteType(std::uint8_t) noexcept;
+ void ReadType(std::uint8_t &) const noexcept;
+ void WriteReferral(std::uint32_t) noexcept;
+ void ReadReferral(std::uint32_t &) const noexcept;
+ void WriteMessage(const std::string &) noexcept;
+ void ReadMessage(std::string &) const noexcept;
+ };
+
+
+ template<class PayloadType>
+ PayloadType As() {
+ PayloadType result;
+ result.length = PayloadType::MAX_LEN;
+ result.data = &payload[0];
+ return result;
+ }
+
+ template<class PayloadType>
+ static PayloadType As(const UDPpacket &pack) {
+ PayloadType result;
+ result.length = std::min(pack.len - sizeof(Header), PayloadType::MAX_LEN);
+ result.data = pack.data + sizeof(Header);
+ return result;
+ }
+ template<class PayloadType>
+ static PayloadType Make(UDPpacket &udp_pack) {
+ Packet &pack = *reinterpret_cast<Packet *>(udp_pack.data);
+ pack.Tag();
+ pack.Type(PayloadType::TYPE);
- void Tag() noexcept;
+ udp_pack.len = sizeof(Header) + PayloadType::MAX_LEN;
- std::size_t Ping() noexcept;
- std::size_t Login(const std::string &name) noexcept;
+ PayloadType result;
+ result.length = PayloadType::MAX_LEN;
+ result.data = pack.payload;
+ return result;
+ }
};
projects / blank.git / blobdiff