How to read UDP packet with variable length in C

Question

I\'m sending a C struct over UDP

struct packet{
    int numInt;
    int* intList; //malloc\'ed as (sizeof(int)*numInt)
}

It will be seriali

Answer 1

I'm pretty sure recvfrom will read up to as many bytes as is told to it by its 3rd argument, len. If there are fewer bytes available, it will return what is there. If there are more, it will return up to len bytes. You may have to make additional calls to obtain all the data your are expecting.