You are not allowed to do network operations with the Main (UI) thread. There are several ways of using background threads. I would recommend using AsyncTask since it has a nice structure which is easy to understand. http://developer.android.com/reference/android/os/AsyncTask.html Here is an SO example also: AsyncTask Android example Should be a lot more available on Google. … Read more
The format-string “<L” in the expression struct.pack(“<L”,self.src) means that pack interpretes the value in self.src as little-endian ordered unsigned long value. The endianess is a convention, which determines in which direction a sequence of bits are interpreted as a number: from (Big-endian) left to right, or from (Little-endian) right to left. Afterwards the unsigned long … Read more
You can start by reading up the RFC governing the FTP protocol. With that you can get an idea on how the FTP protocol works, how it sends commands, expected responses etc. You can find a link here: https://www.rfc-editor.org/rfc/rfc959 Aside from that you can have a look at this GitHub repository. In there you’ll find … Read more
the send function doesn’t except uint8_t* so you should cast the contents of the vector like this : (const char*)data1.data(); Also the vector class doesn’t have length () method you should use size() solved C++ sending a vector across a socket connection
I think there have no best choice. They are used for different usage scenarios. And, I like “socket”. solved Which is best for realtime chat? [closed]
Can I create socket between two devices where one device is connected to wifi internet and other is connected to 3G or 2G internet.? solved Can I create socket between two devices where one device is connected to wifi internet and other is connected to 3G or 2G internet.?
Assuming envois is a socket, you will not receive more than the amount you specify. From the docs socket.recv(bufsize[, flags]) Receive data from the socket. The return value is a bytes object representing the data received. The maximum amount of data to be received at once is specified by bufsize. You should be able to … Read more
Error 10038 is WSAENOTSOCK: The descriptor is not a socket. You are calling socket() and assigning your SOCKET handles inside of if statements, but you are missing adequate parenthesis. They should be like this instead: if( (receivingSocket = socket(AF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET ) if( (sendingSocket = socket(AF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET ) Personally, I … Read more
This is HTTP. You can’t just open a socket and start reading something. You have to be polite to the server and send a request first: socket.getOutputStream().write(“GET /index.html HTTP/1.0\n\n”.getBytes()); socket.getOutputStream().flush(); Then read a HTTP response, parse it, and get your html page back. EDIT I wrote what to do with sockets only because it was … Read more
My question is clear enough. Now, I know the answer. I know how to inspect source code, I read the source code of method socket.create_connection(address[, timeout[, source_address]]), I asked for source_address, it’s all about binding. I have this question because I am a beginner, I have no background knowledge of socket programming, so I find … Read more
Try WriteData(std::string(“\0”,1)); using your function or even: const char null_data(0); send(newsockfd,&null_data,1,0); to send it directly. WriteData(“00000000”); Will actually sends 8 octets of 48 [decimal] (assuming your platform is ASCII which all modern systems are compatible with). However \0 is the escape sequence used in string literals to represent the null character (that is the zero … Read more
You are NOT supposed to use AF_UNSPEC with socket() at all. You MUST use either AF_INET (IPv4) or AF_INET6 (IPv6). You can use AF_UNSPEC with the hints input parameter of getaddrinfo() to indicate that you are willing to accept both IPv4 and IPv6 addresses as output. The actual addresses in the output will be either … Read more
This is a Python3 example I got from https://www.kite.com/python/answers/how-to-check-if-a-network-port-is-open-in-python import socket a_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) port = 8080 location = (“127.0.0.1”, port) check = a_socket.connect_ex(location) if check == 0: print(“Port is open”) else: print(“Port is not open”) 1 solved Check If Port is Open in Python3?
Basically, what you’re looking for is something like this : #include <sys/types.h> #include <sys/socket.h> #include <pthread.h> void* handle_connection(void *arg) { int client_sock = *(int*)arg; /* handle the connection using the socket… */ } int main(void) { /* do the necessary setup, i.e. bind() and listen()… */ int client_sock; pthread_t client_threadid; while((client_sock = accept(server_sock, addr, addrlen)) … Read more
You don’t translate code line by line. Different platforms and even different frameworks use different styles of API. Since your question doesn’t say what you are trying to do, I can only recommend that you read more about how stream and socket programming works on iOS in the Stream Programming Guide, or the CFNetwork Programming … Read more