so_priority.so

Set SO_PRIORITY (aka skb->priority on Linux) right after each socket() call.

Compile with:

gcc -shared -ldl -fPIC so_priority.c -o so_priority.so

Usage:

SO_PRIORITY_DEBUG=1 SO_PRIORITY_VALUE=6 LD_PRELOAD=/path/to/so_priority.so program arg1 arg2