+#include "protocol.h"
#include <cstring>
#include <string>
#include <msp/core/maputils.h>
+#include <msp/strings/format.h>
#include <msp/strings/lexicalcast.h>
-#include "protocol.h"
using namespace std;
-namespace {
+namespace Msp {
+namespace Net {
-using Msp::Net::buffer_error;
+Protocol::Protocol():
+ header_def(0)
+{
+ PacketDefBuilder<PacketHeader, Serializer<PacketHeader>>(*this, header_def, Serializer<PacketHeader>())
+ .fields(&PacketHeader::type, &PacketHeader::length);
+}
-template<typename T>
-class Assembler
+unsigned Protocol::get_next_packet_class_id()
{
-public:
- static char *assemble(const T &v, char *, char *);
- static const char *disassemble(T &, const char *, const char *);
-};
+ static unsigned next_id = 1;
+ return next_id++;
+}
-template<typename T>
-class Assembler<vector<T> >
+void Protocol::add_packet(unique_ptr<PacketDefBase> pdef)
{
-public:
- static char *assemble(const vector<T> &v, char *, char *);
- static const char *disassemble(vector<T> &, const char *, const char *);
-};
+ unique_ptr<PacketDefBase> &ptr = packet_class_defs[pdef->get_class_id()];
+ if(ptr)
+ packet_id_defs.erase(ptr->get_id());
+ ptr = move(pdef);
+ if(unsigned id = ptr->get_id())
+ packet_id_defs[id] = ptr.get();
+}
-template<typename T>
-char *Assembler<T>::assemble(const T &v, char *data, char *end)
+const Protocol::PacketDefBase &Protocol::get_packet_by_class_id(unsigned id) const
{
- // XXX Assumes little-endian
- const char *ptr = reinterpret_cast<const char *>(&v)+sizeof(T);
- for(unsigned i=0; i<sizeof(T); ++i)
- {
- if(data==end)
- throw buffer_error("overflow");
- *data++ = *--ptr;
- }
- return data;
+ return *get_item(packet_class_defs, id);
}
-template<>
-char *Assembler<string>::assemble(const string &v, char *data, char *end)
+const Protocol::PacketDefBase &Protocol::get_packet_by_id(unsigned id) const
{
- data = Assembler<unsigned short>::assemble(v.size(), data, end);
- if(end-data<static_cast<int>(v.size()))
- throw buffer_error("overflow");
- memcpy(data, v.data(), v.size());
- return data+v.size();
+ return *get_item(packet_id_defs, id);
}
-template<typename T>
-char *Assembler<vector<T> >::assemble(const vector<T> &v, char *data, char *end)
+unsigned Protocol::get_max_packet_id() const
{
- data = Assembler<unsigned short>::assemble(v.size(), data, end);
- for(typename vector<T>::const_iterator i=v.begin(); i!=v.end(); ++i)
- data = Assembler<T>::assemble(*i, data, end);
- return data;
+ if(packet_id_defs.empty())
+ return 0;
+ return prev(packet_id_defs.end())->first;
}
-template<typename T>
-const char *Assembler<T>::disassemble(T &v, const char *data, const char *end)
+size_t Protocol::dispatch(ReceiverBase &rcv, const char *buf, size_t size, unsigned base_id) const
{
- char *ptr = reinterpret_cast<char *>(&v)+sizeof(T);
- for(unsigned i=0; i<sizeof(T); ++i)
+ PacketHeader header;
+ const char *ptr = header_def.deserialize(header, buf, buf+size);
+ if(header.length>size)
+ throw bad_packet("truncated");
+ const PacketDefBase &pdef = get_packet_by_id(header.type-base_id);
+ if(DynamicReceiver *drcv = dynamic_cast<DynamicReceiver *>(&rcv))
{
- if(data==end)
- throw buffer_error("underflow");
- *--ptr = *data++;
+ Variant pkt;
+ ptr = pdef.deserialize(pkt, ptr, ptr+header.length);
+ drcv->receive(pdef.get_id(), pkt);
}
- return data;
+ else
+ ptr = pdef.dispatch(rcv, ptr, ptr+header.length);
+ return ptr-buf;
}
-template<>
-const char *Assembler<string>::disassemble(string &v, const char *data, const char *end)
+bool Protocol::get_packet_header(PacketHeader &header, const char *buf, size_t size) const
{
- unsigned short size;
- data = Assembler<unsigned short>::disassemble(size, data, end);
- if(end-data<size)
- throw buffer_error("underflow");
- v.assign(data, data+size);
- return data+size;
+ if(size<4)
+ return false;
+ header_def.deserialize(header, buf, buf+size);
+ return true;
}
-template<typename T>
-const char *Assembler<vector<T> >::disassemble(vector<T> &v, const char *data, const char *end)
+size_t Protocol::get_packet_size(const char *buf, size_t size) const
+{
+ PacketHeader header;
+ return (get_packet_header(header, buf, size) ? header.length : 0);
+}
+
+uint64_t Protocol::get_hash() const
{
- /* We assume that the vector is in pristine state - this holds because the
- only code path leading here is from PacketDef<P>::disassemble, which creates
- a new packet. */
- unsigned short size;
- data = Assembler<unsigned short>::disassemble(size, data, end);
- for(unsigned i=0; i<size; ++i)
+ uint64_t result = hash<64>(packet_id_defs.size());
+ for(auto &kvp: packet_id_defs)
{
- T u;
- data = Assembler<T>::disassemble(u, data, end);
- v.push_back(u);
+ hash_update<64>(result, kvp.first);
+ hash_update<64>(result, kvp.second->get_hash());
}
- return data;
+ return result;
}
-}
-namespace Msp {
-namespace Net {
+/* TODO These assumes the machine is little-endian; are there any relevant
+big-endian platforms these days? */
+template<typename T>
+char *Protocol::BasicSerializer<T>::serialize(const T &value, char *buf, char *end) const
+{
+ if(end-buf<static_cast<int>(sizeof(T)))
+ throw buffer_error("overflow");
-Protocol::Protocol(unsigned npi):
- next_packet_id(npi)
-{ }
+ const char *ptr = reinterpret_cast<const char *>(&value)+sizeof(T);
+ for(size_t i=0; i<sizeof(T); ++i)
+ *buf++ = *--ptr;
-Protocol::~Protocol()
-{
- for(map<unsigned, PacketDefBase *>::iterator i=packet_class_defs.begin(); i!=packet_class_defs.end(); ++i)
- delete i->second;
+ return buf;
}
-void Protocol::add_packet(PacketDefBase &pdef)
+template<typename T>
+const char *Protocol::BasicSerializer<T>::deserialize(T &value, const char *buf, const char *end) const
{
- PacketDefBase *&ptr = packet_class_defs[pdef.get_class_id()];
- if(ptr)
- delete ptr;
- ptr = &pdef;
- packet_id_defs[pdef.get_id()] = &pdef;
-}
+ if(end-buf<static_cast<int>(sizeof(T)))
+ throw buffer_error("underflow");
-const Protocol::PacketDefBase &Protocol::get_packet_by_class(unsigned id) const
-{
- return *get_item(packet_class_defs, id);
-}
+ char *ptr = reinterpret_cast<char *>(&value)+sizeof(T);
+ for(size_t i=0; i<sizeof(T); ++i)
+ *--ptr = *buf++;
-const Protocol::PacketDefBase &Protocol::get_packet_by_id(unsigned id) const
-{
- return *get_item(packet_id_defs, id);
+ return buf;
}
-unsigned Protocol::disassemble(ReceiverBase &rcv, const char *data, unsigned size) const
-{
- const unsigned char *udata = reinterpret_cast<const unsigned char *>(data);
- unsigned id = (udata[0]<<8)+udata[1];
- unsigned psz = (udata[2]<<8)+udata[3];
- if(psz>size)
- throw bad_packet("truncated");
- const PacketDefBase &pdef = get_packet_by_id(id);
- const char *ptr = pdef.disassemble(rcv, data+4, data+psz);
- return ptr-data;
-}
+template char *Protocol::BasicSerializer<bool>::serialize(const bool &, char *, char *) const;
+template char *Protocol::BasicSerializer<int8_t>::serialize(const int8_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<int16_t>::serialize(const int16_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<int32_t>::serialize(const int32_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<int64_t>::serialize(const int64_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<uint8_t>::serialize(const uint8_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<uint16_t>::serialize(const uint16_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<uint32_t>::serialize(const uint32_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<uint64_t>::serialize(const uint64_t &, char *, char *) const;
+template char *Protocol::BasicSerializer<float>::serialize(const float &, char *, char *) const;
+template char *Protocol::BasicSerializer<double>::serialize(const double &, char *, char *) const;
+template const char *Protocol::BasicSerializer<bool>::deserialize(bool &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<int8_t>::deserialize(int8_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<int16_t>::deserialize(int16_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<int32_t>::deserialize(int32_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<int64_t>::deserialize(int64_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<uint8_t>::deserialize(uint8_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<uint16_t>::deserialize(uint16_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<uint32_t>::deserialize(uint32_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<uint64_t>::deserialize(uint64_t &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<float>::deserialize(float &, const char *, const char *) const;
+template const char *Protocol::BasicSerializer<double>::deserialize(double &, const char *, const char *) const;
+
+
+Protocol::StringSerializer::StringSerializer(const Protocol &p):
+ length_serializer(p)
+{ }
-unsigned Protocol::get_packet_size(const char *data, unsigned size) const
+char *Protocol::StringSerializer::serialize(const string &str, char *buf, char *end) const
{
- if(size<4)
- return 0;
- const unsigned char *udata = reinterpret_cast<const unsigned char *>(data);
- return (udata[2]<<8)+udata[3];
+ buf = length_serializer.serialize(str.size(), buf, end);
+ if(end-buf<static_cast<int>(str.size()))
+ throw buffer_error("overflow");
+ copy(str.begin(), str.end(), buf);
+ return buf+str.size();
}
-unsigned Protocol::get_hash() const
+const char *Protocol::StringSerializer::deserialize(string &str, const char *buf, const char *end) const
{
- // TODO
- return 123;
+ uint16_t length;
+ buf = length_serializer.deserialize(length, buf, end);
+ if(end-buf<static_cast<int>(length))
+ throw buffer_error("underflow");
+ str.assign(buf, buf+length);
+ return buf+length;
}
-void Protocol::assemble_header(char *buf, unsigned id, unsigned size)
-{
- buf[0] = (id>>8)&0xFF;
- buf[1] = id&0xFF;
- buf[2] = (size>>8)&0xFF;
- buf[3] = size&0xFF;
-}
-template<typename T>
-char *Protocol::assemble_field(const T &v, char *d, char *e)
-{ return Assembler<T>::assemble(v, d, e); }
-
-template char *Protocol::assemble_field<>(const char &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const signed char &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const unsigned char &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const short &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const unsigned short &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const int &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const unsigned &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const long &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const unsigned long &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const float &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const double &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const string &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<char> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<signed char> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<unsigned char> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<short> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<unsigned short> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<int> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<unsigned> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<long> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<unsigned long> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<float> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<double> &v, char *d, char *e);
-template char *Protocol::assemble_field<>(const vector<string> &v, char *d, char *e);
+Protocol::PacketDefBase::PacketDefBase(unsigned i):
+ id(i)
+{ }
-template<typename T>
-const char *Protocol::disassemble_field(T &v, const char *d, const char *e)
-{ return Assembler<T>::disassemble(v, d, e); }
-
-template const char *Protocol::disassemble_field<>(char &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(signed char &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(unsigned char &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(short &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(unsigned short &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(int &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(unsigned &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(long &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(unsigned long &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(float &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(double &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(string &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<char> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<signed char> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<unsigned char> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<short> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<unsigned short> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<int> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<unsigned> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<long> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<unsigned long> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<float> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<double> &v, const char *d, const char *e);
-template const char *Protocol::disassemble_field<>(vector<string> &v, const char *d, const char *e);
-
-unsigned Protocol::PacketDefBase::next_class_id = 1;
+
+Protocol::PacketHeader::PacketHeader(uint16_t t, uint16_t l):
+ type(t),
+ length(l)
+{ }
} // namespace Net
} // namespace Msp
projects / libs / net.git / blobdiff