PP2_SIG
memcpy(buf, PP2_SIG, PP2_SIG_LEN);
if(memcmp(header, PP2_SIG, PP2_SIG_LEN) != 0 ||
memcpy(buf, PP2_SIG, PP2_SIG_LEN);
if(memcmp(header, PP2_SIG, PP2_SIG_LEN) != 0 ||
memcpy(buf, PP2_SIG, PP2_SIG_LEN);
if(memcmp(header, PP2_SIG, PP2_SIG_LEN) != 0 ||