Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I am writing a small C program to understand sockets. What is the maximum length of data returned from recvfrom?
recvfrom(raw, packet_buffer, buf_size, … );
what is the maximum buf_size in linux. Is there a constant related to this size_t?
Thanks
This isn’t really a direct answer … somewhat oblique to the question. For TCP/IP, even if you determine what the maximum size is on your system, it would probably be best to implement the code to not rely on that. With stream-oriented sockets, the excess data is not lost. So you can call the receive function again to retrieve the remaining data. That is not true with message-oriented (UDP) connections, though.