tcp

问题 I used the async tcp server example from boost which is near to what my application is doing. The code example below is a fully working example. At first I start an async read operation until the delimiter char. In this case it is the http header complete sequence. The request contains some payload which is "hello world" (11 bytes). For a simplified example I use lambda handlers here. The first handler is called wit a length of 148 which is the header including four bytes for the delimiter

问题 I used the async tcp server example from boost which is near to what my application is doing. The code example below is a fully working example. At first I start an async read operation until the delimiter char. In this case it is the http header complete sequence. The request contains some payload which is "hello world" (11 bytes). For a simplified example I use lambda handlers here. The first handler is called wit a length of 148 which is the header including four bytes for the delimiter

问题 I'm testing some code in C and I've found strange behaviour with TCP socket calls. I've defined one listening thread which accepts clients synchronously and after accepting the client it process it in a for loop until it disconnects. Thus only one client at a time is handled. So I call accept in a loop and then recv in an inner loop until received an empty buffer. I fire 5 threads with clients, I call connect , send and finally close I get no error in any call. Everything seems to be fine.

问题 For learning purposes I am making my own TCP Socket class. The class is intended for handling multiple clients. Each client is stored in a vector . I am having the issue of properly removing the client from the vector when it disconnects. How can I properly remove the client on a disconnect from the vector and how can I handle incoming data accordingly? (see else branch). Currently the console gets spammed with the std::cout of the else case on a disconnect. bool socks::start() { if (listen

问题 I have an app that makes a request to a server and gets authenticated. I'm wondering if it is a possible to write a listener that listens for requests and if any request matches that particular request the listener sends back a message, without it actually getting to the server. In essence I want to make the app. think it has been authenticated when it actually hasn't. This is what the tcp stream looks like on WireShack. The highlighted response is exactly what I want my code to respond to.

问题 I'm attempting to write a TCP socket interface for my program and I'm pulling my hair out with an accept() error (I think). For this I've created some boiled down test code. First I do a little set up int server_socket = 0; server_socket = socket(AF_INET, SOCK_STREAM, 0); int accepted_connection = 0; struct sockaddr_in server_address; server_address.sin_port = htons(9001); server_address.sin_family = AF_INET; server_address.sin_addr.s_addr = INADDR_ANY; struct sockaddr_in client_address;

问题 I am trying to build a scapy 3 way handshake. But when I send an Acknowledgement packet in response of SYN-ACK packet, I receive a FA packet instead of completion of 3 way handshake. My code is. from scapy.all import* ip = IP(dst = "192.168.0.1") syn = TCP(dport=35021, flags="S", seq=100) synack = sr1(ip/syn, iface = "D-Link DUB-E100 USB 2.0 Fast Ethernet Adapter") ack = TCP(dport=35021, flags="A", seq=101, ack=synack.seq+1) ans=sr1(ip/ack, iface = "D-Link DUB-E100 USB 2.0 Fast Ethernet

问题 I'm developing a tcp server in c++ using boost. I'd like process incoming data line by line and am looking for a socket.readLine method. However, I can only find a read_some() method. I don't what the definition on "some" is, but I don't think the string necessarily ends with a "\n". So how can I implement socket.readLine() using boost? 回答1: I assume you are using boost::asio. If so, there is a read_until() function that does what you want. http://www.boost.org/doc/libs/1_47_0/doc/html/boost

问题 I am using @MessagingGateway to send data to to server. I configured a AbstractClientConnectionFactory and a @ServiceActivator for my outbound gateway. In order to send data to my server, I need to send a handshake message when the connection is initiated. If the response from server is the response that I expect for the handshake, then I send meaningful data. My initial solution is if (gateway.handshake(HANDSHAKE).equals(HANDSHAKE_RESPONSE)) gateway.sendData(data); This is not so good when i

问题 I'm new to twisted framework. And I know there are many callback function will trigger automatically When the connection made or lost. But I have no idea how to send the data without those callbacks. For example , I want to put an method custom_write() for sending the data out. def custom_write(self,data): self.transport.write( data) And trigger the function in my main(): method. def main(): try: p_red("I'm Client") f = EchoFactory() reactor.connectTCP("localhost", 8000, f) by the reactor