【手游项目4】手动拆包逻辑

比如我们和前端互通的包大小限制是4K，如果发一个大于4K的包就无法发送，这时候就需要和前端拆包和包。

bool LobbyServer::SendPbMsgToClient(PlayerNode *lpPlayerNode, unsigned short type, void *buf, long len, int end)
{
	__log(_ERROR, __FUNCTION__, "type[%d],len[%d],end[%d]", type, len, end);
	tagNetMsg pNetMsg;
	memcpy(&pNetMsg, buf, sizeof(tagNetMsg));
	pNetMsg.header.identity = IDENTIFY_VER;
	pNetMsg.header.encode = ENCODE_NONE;
	pNetMsg.header.length = len;
	pNetMsg.header.version = end;
	pNetMsg.header.reserve = ENCODE_AES;
	pNetMsg.header.type = type;
	len += sizeof(tagMsgHeader);
	return SendData(lpPlayerNode, type, &pNetMsg, len);
}

bool LobbyServer::SendBigPbMsgToClient(PlayerNode *lpPlayerNode, unsigned short type, DataPacket &strDataPacket)
{
	int test_buff_size = MAX_BUFF_SIZE;
	int nLength = strDataPacket.getSize();
	int i = 0;
	do
	{
		if (test_buff_size < nLength )
		{
			tagNetMsg sendDataStr;
			memcpy(sendDataStr.buff, strDataPacket.getPositionPtr(i*test_buff_size), test_buff_size);
			SendPbMsgToClient(lpPlayerNode, type, &sendDataStr, test_buff_size, 0);
		}
		else
		{
			tagNetMsg sendDataStr;
			memcpy(sendDataStr.buff, strDataPacket.getPositionPtr(i*test_buff_size), nLength);
			SendPbMsgToClient(lpPlayerNode, type, &sendDataStr, nLength, 1);
		}
		nLength = nLength - test_buff_size;
		i++;
	} while (0 < nLength);
}