MAX_PNETID_LEN
#define MAX_PNETID_PORTS (PNETIDS_LEN / MAX_PNETID_LEN)
u8 pnetids[MAX_PNETID_PORTS][MAX_PNETID_LEN];
static const u8 zero[MAX_PNETID_LEN] = { 0 };
memcmp(pnetids[port], zero, MAX_PNETID_LEN))
memcpy(pnetid, pnetids[port], MAX_PNETID_LEN);