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

You could try using a small buffer, just large enough to get numInt, with the MSG_PEEK flag set. Then you can find out the size you actually need, and receive again without MSG_PEEK to get the whole thing.