C++ PACKET函数代码示例

void g1_server_class::start_game()
{

    PACKET(packet,r);
    r.write_8(G1_PK_WE_ARE_STARTING);
    r.write_32(4);
    send_to_all(packet,&r);
    send_to_all(packet,&r);
    state=LOADING;
};

void AppServer::sendTest(std::string msg)
{
    PACKET(PacketTest, PACKET_TEST);
#ifdef PACKET_WITH_JSON
    std::string data = "{\"msg\":" + msg + "}";
    packet->setData(data, 0, false);
#else
    packet->msg = msg;
#endif
    SEND_PACKET(packet)
}

int g1_client_class::prepare_command(int command)
{
    g1_global_id.poll();
    switch (state)
    {
    case SYNCING:
    case LOADING:
    {
        state=SYNCING;
        PACKET(sp,r);
        r.write_8(G1_PK_LOADING_DONE);
        i4_warning("We are ready to start.");
        send_server(sp,&r);
    }
    return NE_ERROR_NOTREADY;

    case RUNNING:
    {
        if (!network_file)
        {
            network_file=new i4_temp_file_class(2000,2000);
        }

        switch (command)
        {
        case G1_PK_GAME_DATA:
        {
            network_file->clear();
            network_file->write_8(command);
            network_file->write_32(0); //placeholder for length
            network_file->write_32(g1_tick_counter);

        }
        break;
        case G1_PK_PROCESS:
        {
            send_server(network_file->get_buffer(),network_file);
            network_file->clear();
            network_file->write_8(G1_PK_GAME_DATA);
            network_file->write_32(0);
            network_file->write_32(g1_tick_counter);
        }
        break;
        }
    }
    break;
    }
    if (!g1_global_id.is_ready())
    {
        return NE_ERROR_NOTREADY;
    }
    return NE_ERROR_OK;
}

CNpc::CNpc(uint8_t *pData, uint32_t size)
{
	PACKET(Packets::SSpawnNPCPacket::SPacket, pData, packet);

	m_Object.dir	= TO_FLOAT_DIR(packet.dir);
	m_Object.id		= packet.id;
	m_Object.type	= packet.type;
	m_Object.x		= packet.x;
	m_Object.y		= packet.y;
	m_Object.z		= packet.z;
	m_Object.dead	= false;
}

static int crt_image_findfile(crt_image *image, const char *fname)
{
	int nr=0;
	char name[6];
	int i=sizeof(crt_header);

	while (i<image->size) {
		sprintf(name, "%d",nr);
		if (!strcmp(fname, name) ) return i;
		i+=GET_ULONG( PACKET(image, i)->packet_length );
		nr++;
	}
	return 0;
}

static int crt_image_readfile(imgtool_image *img, const char *fname, imgtool_stream *destf)
{
	crt_image *image=(crt_image*)img;
	int size;
	int pos;

	if (!(pos=crt_image_findfile(image, fname)) )
		return IMGTOOLERR_MODULENOTFOUND;

	size=GET_UWORD( PACKET(image, pos)->length );
	if (stream_write(destf, image->data+pos+sizeof(crt_packet), size)!=size) {
		return IMGTOOLERR_WRITEERROR;
	}

	return 0;
}

    // app data -> SSL -> protocol encapsulation -> reliability layer -> network
    void down_stack_app()
    {
      if (ssl_started_)
	{
	  // push app-layer cleartext through SSL object
	  while (!app_write_queue.empty())
	    {
	      BufferPtr& buf = app_write_queue.front();
	      try {
		const ssize_t size = ssl_->write_cleartext_unbuffered(buf->data(), buf->size());
		if (size == SSLContext::SSL::SHOULD_RETRY)
		  break;
	      }
	      catch (...)
		{
		  if (stats)
		    stats->error(Error::SSL_ERROR);
		  invalidate(Error::SSL_ERROR);
		  throw;
		}
	      app_write_queue.pop_front();
	    }

	  // encapsulate SSL ciphertext packets
	  while (ssl_->read_ciphertext_ready() && rel_send.ready())
	    {
	      typename ReliableSend::Message& m = rel_send.send(*now);
	      m.packet = PACKET(ssl_->read_ciphertext());

	      // encapsulate packet
	      try {
		encapsulate(m.id(), m.packet);
	      }
	      catch (...)
		{
		  if (stats)
		    stats->error(Error::ENCAPSULATION_ERROR);
		  invalidate(Error::ENCAPSULATION_ERROR);
		  throw;
		}

	      // transmit it
	      net_send(m.packet, NET_SEND_SSL);
	    }
	}
    }

static int crt_image_deletefile(imgtool_image *img, const char *fname)
{
	crt_image *image=(crt_image*)img;
	int size;
	int pos;

	if (!(pos=crt_image_findfile(image, fname)) ) {
		return IMGTOOLERR_MODULENOTFOUND;
	}
	size=GET_ULONG(PACKET(image, pos)->packet_length);
	if (image->size-pos-size>0)
		memmove(image->data+pos, image->data+pos+size, image->size-pos-size);
	image->size-=size;
	image->modified=1;

	return 0;
}

static int crt_image_writefile(imgtool_image *img, const char *fname, imgtool_stream *sourcef,
							   const ResolvedOption *_options)
{
	crt_image *image=(crt_image*)img;
	int size;
	int pos;

	size=stream_size(sourcef);
	if (!(pos=crt_image_findfile(image, fname)) ) {
		// appending
		pos=image->size;
		if (!(image->data=realloc(image->data, image->size+size+sizeof(crt_packet))) )
			return IMGTOOLERR_OUTOFMEMORY;
		image->size+=size+sizeof(crt_packet);
	} else {
		int oldsize=GET_ULONG(PACKET(image,pos)->packet_length);
		// overwritting
		if (!(image->data=realloc(image->data, image->size+size+sizeof(crt_packet)-oldsize) ) )
			return IMGTOOLERR_OUTOFMEMORY;
		if (image->size-pos-oldsize!=0) {
			memmove(image->data+pos+size+sizeof(crt_packet), image->data+pos+oldsize,
					image->size-pos-oldsize);
		}
		image->size+=size+sizeof(crt_packet)-oldsize;
	}
	if (stream_read(sourcef, image->data+pos+sizeof(crt_packet), size)!=size) {
		return IMGTOOLERR_READERROR;
	}
	memset(image->data+pos, 0, sizeof(crt_packet));
	memcpy(PACKET(image,pos)->id,"CHIP",4);
	SET_ULONG( PACKET(image, pos)->packet_length, size+sizeof(crt_packet));
	SET_UWORD(PACKET(image, pos)->chip_type, _options[C64CRT_FILEOPTION_FTYPE].i);
	SET_UWORD( PACKET(image, pos)->address, _options[C64CRT_FILEOPTION_FADDR].i);
	SET_UWORD( PACKET(image, pos)->bank, _options[C64CRT_FILEOPTION_FBANK].i);
	SET_UWORD( PACKET(image, pos)->length, size);

	image->modified=1;

	return 0;
}

static int crt_image_nextenum(imgtool_directory *enumeration, imgtool_dirent *ent)
{
	crt_iterator *iter=(crt_iterator*)enumeration;

	ent->corrupt=0;

	if (!(ent->eof=(iter->pos>=iter->image->size))) {
		sprintf(ent->fname,"%d", iter->number);
		ent->filesize=GET_UWORD( PACKET(iter->image, iter->pos)->length );
		if (ent->attr) {
		    unsigned crc=crc32(0, iter->image->data+iter->pos+sizeof(crt_packet), ent->filesize);
			sprintf(ent->attr,"%-4s %s bank:%-2d addr:%.4x crc:%8x",
					(char*)PACKET(iter->image, iter->pos),
					chip_types[GET_UWORD(PACKET(iter->image,iter->pos)->chip_type)],
					GET_UWORD( PACKET(iter->image,iter->pos)->bank),
					GET_UWORD( PACKET(iter->image,iter->pos)->address),
				crc);
		}
		iter->number++;

		iter->pos+=GET_ULONG( PACKET(iter->image, iter->pos)->packet_length );
	}
	return 0;
}

void g1_server_class::process_client_packet(w8 * packet,
        int packet_length,
        int client_num)
{
    clients[client_num].last_data.get();

    i4_ram_file_class r(packet, packet_length);
    w8 msg=r.read_8();
    switch (msg)
    {
    case G1_PK_I_WANNA_JOIN:
    {
        r.read_16(); // skip use port

        delete clients[client_num].username;
        clients[client_num].username=r.read_counted_str();
        send_player_joined(client_num);
    }
    break;
    case G1_PK_LOADING_DONE:
    {
        clients[client_num].flags|=READY;
        i4_bool ok=i4_T;

        for (int i=0; i<G1_MAX_PLAYERS; i++)
        {
            if (clients[i].addr && !(clients[i].flags&READY))
            {
                ok=i4_F; //at least one is not yet ready;
            }
        }
        if (ok&&state==SYNCING)
        {
            int rem_players,player,k,k2;
            rem_players=0;
            player=1; //zero is always neutral,
            //1 is usually local (server) player
            if (player==local_player_num)
            {
                player++;
            }
            for(k=0; k<G1_MAX_PLAYERS; k++)
            {
                if (clients[k].addr!=0)
                {
                    rem_players++;
                    clients[k].remote_player_num=player;
                    player++;
                    if (player==local_player_num)
                    {
                        player++;
                    }
                }
            }
            for (player=0; player<G1_MAX_PLAYERS; player++)
            {
                if (clients[player].addr)
                {
                    PACKET(sp,s);
                    s.write_8(G1_PK_GAME_START);
                    s.write_32(G1_MAX_PLAYERS); //So many ai's are going to follow
                    for (k=0; k<G1_MAX_PLAYERS; k++)
                    {
                        s.write_32(k);
                        g1_player_info_class * pl=g1_player_man.get(k);
                        i4_bool found=i4_F;
                        if (k==0) //the neutral player
                        {
                            s.write_counted_str(*(pl->get_ai()->ai_name()));
                            found=i4_T;
                        }
                        else if (k==local_player_num)
                        {
                            s.write_counted_str("remote_player");
                            found=i4_T;
                        }
                        else
                        {
                            for (k2=0; k2<G1_MAX_PLAYERS; k2++)
                            {
                                if (clients[k2].addr && clients[k2].remote_player_num==k)
                                {
                                    //this automatically indicates
                                    //that it is the remote local player
                                    //(only one player can be human at a time on
                                    //a particular machine)
                                    s.write_counted_str("human");
                                    found=i4_T;
                                    break;
                                }
                            }
                        }
                        if (!found) //this player will stay the same as originally defined on the map
                        {
                            s.write_counted_str(*(pl->get_ai()->ai_name()));
                            found=i4_T;
                        }
                    }
                    send_to(sp,&s,player);
                    send_to(sp,&s,player); //its important!
//.........这里部分代码省略.........

i4_bool g1_client_class::poll()  // returns false if server is not responding
{
    if (!listen || !send)
    {
        return 0;
    }


    if (state==JOIN_START)
    {
        i4_time_class now;
        if (now.milli_diff(last_responce_time)>40000)  // if it's been 40 secs assume server dead
        {
            i4_message_box("Server not responding","The server is not responding any more. ",MSG_OK);
            return i4_F;
        }


        w8 packet[512];
        i4_ram_file_class r(packet, sizeof(packet));

        r.write_8(G1_PK_I_WANNA_JOIN);
        r.write_16(use_port);
        r.write_counted_str(*g1_resources.username);

        if (!send->write(packet, r.tell()))
        {
            return i4_F;
        }

    }
    if (state==SYNCING) //set from the main loop as soon as the map is loaded
    {
        PACKET(pack,fp); //we just resend this message till we get the matching reply
        fp.write_8(G1_PK_LOADING_DONE);
        send_server(pack,&fp);
    }

    int noloops=0;
    while (listen->ready_to_read() && noloops<10)
    {
        w8 packet[MAX_PACKET_SIZE];
        i4_net_address * a;
        int s=listen->read_from(packet, sizeof(packet), a);
        if (a->equals(server_address))
        {
            i4_ram_file_class r(packet, sizeof(packet));

            w8 new_message=r.read_8();
            switch (new_message)
            {
            case G1_PK_YOU_HAVE_JOINED:
            {
                player_num=(w8)r.read_16();

                if (map_name)
                {
                    delete map_name;
                }
                map_name=r.read_counted_str();
                i4_warning("We were accepted by the server to join");
                state=CONNECTING;
                last_responce_time.get();
            }
            break;
            case G1_PK_WE_ARE_STARTING:
            {
                num_players=r.read_32();
                if (state==CONNECTING)
                {
                    i4_warning("Loading game data");
                    //don't do this twice.
                    //i4_user_message_event_class u(G1_START_NEW_GAME);
                    i4_file_open_message_class u(G1_SAVEGAME_LOAD_OK, new i4_str (* map_name));
                    i4_kernel.send_event(i4_current_app, &u);
                    state=LOADING;
                }
                //li_call("hide_main_menu");
            }
            break;
            case G1_PK_GAME_START:
            {
                //from now on, it's the main loops task to know that
                //this is a net game
                if (state!=RUNNING)
                {
                    int num_ais=r.read_32();
                    if (num_ais>G1_MAX_PLAYERS)
                    {
                        i4_error("ERROR: Local Golgotha version supports fewer players than this game needs. Check your version.");
                        num_ais=G1_MAX_PLAYERS;
                    }
                    i4_str * ainame=0;
                    g1_team_api_class * newai=0;
                    for (int ais=0; ais<num_ais; ais++)
                    {
                        //the player the next ai is for
                        w32 aifor=r.read_32();
                        ainame=r.read_counted_str();
                        char buf[100];
//.........这里部分代码省略.........

void ProcessUDP(Socket *s, socket_t client, void *buf, size_t len)
{
	if (len > 512)
	{
		printf("WARNING: Invalid packet size: %ld, rejecting packet.\n", len);
		return;
	}
#ifdef _DEBUG
	printf("============= PACKET DATA ==========\n");
	fwrite(buf, 1, len, stdout);
	printf("\nHex:\n");
	for (size_t i = 0, j = 0; i < len; ++i, j++)
	{
		j %= 11;
		printf("%-3X%c", ((uint8_t*)buf)[i], j == 10 ? '\n' : '\0');
	}
	tfm::printf("\nPacket Type: %s", PACKET(*(uint8_t*)buf));
	printf("\n============= END PACKET DATA ==========\n");
#endif

	for (auto it = clients.begin(), it_end = clients.end(); it != it_end;)
	{
		printf("Iterating client!\n");
		whatever_t *w = *it;
		if (w->c.in.sin_port == client.in.sin_port)
		{
			printf("Found client!\n");
			packet_t pak;
			memset(&pak, 0, sizeof(packet_t));
			// Copy the packet.
			memcpy(&pak, buf, len);

#ifdef _DEBUG
			tfm::printf("RAW: packet %d (%.8X), packetno: %d (%.8X)\n", pak.packet, pak.packet, pak.packetno, pak.packetno);
			tfm::printf("RAW ENDIAN: packet %d (%.8X), packetno: %d (%.8X)\n", pak.packet, pak.packet, htonl(pak.packetno), htonl(pak.packetno));
			tfm::printf("Received packet %d (%s)\n", pak.packet, PACKET(pak.packet));
#endif

			// So it isnt a burst, but are we bursting?
			if (!w->bursting)
			{
				tfm::printf("Received packet %d (%s) but we're not bursting?? ignoring packet.\n", pak.packet, PACKET(pak.packet));
				return;
			}

			/*
			 * Description:
			 * So basically the way this works is that we have 5 types of UDP packets.
			 * The first packet type is a "DATABURST" packet, signalling that the client wants to initiate a databurst.
			 * The second packet consists of a timeout value which is uint32_t bytes long, this is the time the client expects to reply.
			 * The third packet type is the number of packet chunks that will be sent (number of datablocks to expect).
			 * The forth packet type is the actual data info from the client which is MessagePack data.
			 * The fifth packet type signals the end of the databurst and to terminate the connection.
			 */

			switch (pak.packet)
			{
				case TIMEOUT:
					// unfuck ntohl.
					w->timeout = pak.packetno;//ntohl(pak.packetno);
					return;
				case INFOPACKS:
					w->totalpackets = pak.packetno;//ntohl(pak.packetno);
					return;
				case INFO:
				{
					// TODO: Prevent buffer-overrun attack?
					size_t datalen = len - sizeof(uint8_t) - sizeof(uint32_t);
					uint8_t *typeddata = reinterpret_cast<uint8_t*>(pak.data);

					w->data.insert(w->data.end(), typeddata, typeddata + datalen);
					w->receivedpackets++;
					return;
				}
				case ENDBURST:
				{
					if (w->receivedpackets == w->totalpackets)
					{
						printf("Processing client.");
						break; // continue running the function.
					}
					else
					{
						// Just delete the received packets and continue until next response.
						printf("Received invalid number of data packets: %ld (expected %ld)\n", w->receivedpackets, w->totalpackets);
						clients.erase(it);
						delete w;
						return;
					}
				}
				default:
					printf("Invalid packet %d, rejecting...\n", pak.packet);
					return;
			}

			printf("Received data burst! Unserializing the data...\n");
			// Unserialize the packet data, then process.
			information_t *info = UnserializeData(w->data);

			// Process the info structure, this submits it to the database among other things.
//.........这里部分代码省略.........

{
    uint32_t *handles = cl + offset;

    fprintf(stderr, "0x%08x 0x%08x:      handle 0: %d, handle 1: %d\n",
            offset, hw_offset, handles[0], handles[1]);
}

#define PACKET_DUMP(name) [name] = { #name, name ## _SIZE, dump_##name }
#define PACKET(name) [name] = { #name, name ## _SIZE, NULL }

static const struct packet_info {
    const char *name;
    uint8_t size;
    void (*dump_func)(void *cl, uint32_t offset, uint32_t hw_offset);
} packet_info[] = {
    PACKET(VC4_PACKET_HALT),
    PACKET(VC4_PACKET_NOP),

    PACKET(VC4_PACKET_FLUSH),
    PACKET(VC4_PACKET_FLUSH_ALL),
    PACKET(VC4_PACKET_START_TILE_BINNING),
    PACKET(VC4_PACKET_INCREMENT_SEMAPHORE),
    PACKET(VC4_PACKET_WAIT_ON_SEMAPHORE),

    PACKET(VC4_PACKET_BRANCH),
    PACKET_DUMP(VC4_PACKET_BRANCH_TO_SUB_LIST),

    PACKET(VC4_PACKET_STORE_MS_TILE_BUFFER),
    PACKET(VC4_PACKET_STORE_MS_TILE_BUFFER_AND_EOF),
    PACKET_DUMP(VC4_PACKET_STORE_FULL_RES_TILE_BUFFER),
    PACKET_DUMP(VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER),

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include "util/u_math.h"
#include "util/macros.h"
#include "vc4_context.h"

#define PACKET(name, size) [name] = { #name, size }

static const struct packet_info {
        const char *name;
        uint8_t size;
} packet_info[] = {
        PACKET(VC4_PACKET_HALT, 1),
        PACKET(VC4_PACKET_NOP, 1),

        PACKET(VC4_PACKET_FLUSH, 1),
        PACKET(VC4_PACKET_FLUSH_ALL, 1),
        PACKET(VC4_PACKET_START_TILE_BINNING, 1),
        PACKET(VC4_PACKET_INCREMENT_SEMAPHORE, 1),
        PACKET(VC4_PACKET_WAIT_ON_SEMAPHORE, 1),

        PACKET(VC4_PACKET_BRANCH, 5),
        PACKET(VC4_PACKET_BRANCH_TO_SUB_LIST, 5),

        PACKET(VC4_PACKET_STORE_MS_TILE_BUFFER, 1),
        PACKET(VC4_PACKET_STORE_MS_TILE_BUFFER_AND_EOF, 1),
        PACKET(VC4_PACKET_STORE_FULL_RES_TILE_BUFFER, 5),
        PACKET(VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER, 5),