packet

问题 I made a packet p, with some integers and boolean values. The packet is as follows: TCPPacket p=new TCPPacket(481,516,23,42,true,false,false,false,false,false,false,false,10,10); How can I encrypt the packet with AES, in Java? 回答1: I suggest you read through the tutorial Using AES with Java Technology from Oracle. (First hit on Google btw.) 回答2: This is some sample code that should get you started. It uses AES (128) to crypt and decrypt an object (using SealedObject). public class App {

问题 Question for C only, C++ and vectors do not solve problem. I have such structure: typedef __packed struct Packet_s { U8 head; U16 len; U32 id; U8 data; U8 end; U16 crc; } Packet_t, *Packet_p; ( EDIT : U8 is uint8_t (unsigned char) and so on) For example, I've received packet(hex): 24 0B 00 07 00 00 00 AA 0D 16 1C where head = 0x24 len = 0x0B 0x00 id = 0x07 0x00 0x00 0x00 data = 0xAA end = 0x0D crc = 0x16 0x1C I can copy it from incoming buffer like this U8 Buffer[SIZE]; // receives all bytes

问题 i m a new . i m a java developer(fresher) and currently i m working on BSE project and i m facing problem to read the packet of bytes on the client(client socket) from the server(server socket). if u can help me then please help me. Thanks in advance 回答1: Well, if you want to interact directly with packets, then you need to use a DatagramSocket instead of the regular Socket and ServerSocket . Then, you should visit this link to see a good tutorial on how to get started with sending and

问题 I have a general socket programming question for you. I have a C struct called Data: struct data { double speed; double length; char carName[32]; struct Attribs; } struct Attribs { int color; } I would like to be able to create a similar structure in Java, create a socket, create the data packet with the above struct, and send it to a C++ socket listener. What can you tell me about having serialized data (basically, the 1's and 0's that are transferred in the packet). How does C++ "read"

问题 There is an answer explaining in simple terms how a router works translating requests from the local network to outside and back (https://superuser.com/questions/105838/how-does-router-know-where-to-forward-packet) what is not clear - for how long a record in the NAT is kept? For example, if I send a UDP request to 25.34.11.56:3874 and my local endpoint is 192.168.1.21:54389 the router rewrites the request packet and adds a record to the NAT. Let's say the external endpoint will be 68.55.32

问题 I am working on a websocket implementation and do not know what the sense of a mask is in a frame. Could somebody explain me what it does and why it is recommend? 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-------+-+-------------+-------------------------------+ |F|R|R|R| opcode|M| Payload len | Extended payload length | |I|S|S|S| (4) |A| (7) | (16/64) | |N|V|V|V| |S| | (if payload len==126/127) | | |1|2|3| |K| | | +-+-+-+-+-------+-+-------------+ - - -

问题 I am storing images in MYSQL. I have table as CREATE TABLE myTable (id INT, myImage BLOB); When I am trying to insert 4.7MB file, I am getting exception as com.mysql.jdbc.PacketTooBigException: Packet for query is too large (4996552 > 1048576). You can change this value on the server by setting the max_allowed_packet' variable. I believe this is related to image size only. Is there any other variable type that I can use? Update 1 As per older SO question, I also tried with MEDIUMBLOB but

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . How can I sniff packets from my iPhone on my network? can someone give me some instructions? I tried Googling, but nothing teaches how to sniff iPhone packets、 I am on windows. 回答1: You can use Paros to sniff the network traffic from your iPhone. See this excellent step by step post

问题 The following code sends a packet on port 15000: int port = 15000; UdpClient udp = new UdpClient(); //udp.EnableBroadcast = true; //This was suggested in a now deleted answer IPEndPoint groupEP = new IPEndPoint(IPAddress.Broadcast, port); string str4 = "I want to receive this!"; byte[] sendBytes4 = Encoding.ASCII.GetBytes(str4); udp.Send(sendBytes4, sendBytes4.Length, groupEP); udp.Close(); However, it's kind of useless if I can't then receive it on another computer. All I need is to send a

问题 I have a game server (WoW). I want my players to download my custom patches to the game. I've done a program that checks for update/downloading things. I want my program to send a packet to my game server if player have all my patches. I dont need any response from the server, it will handle it, but its another story. So I want to know, how to send a packet to a server. Thank you! 回答1: Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); IPAddress