read_be_dword
r = read_be_dword(&buf[24]);
m1 = read_be_dword(buf);
m2 = read_be_dword(&buf[4]);
m3 = read_be_dword(&buf[8]);
s = SEC_TO_TAI64(read_be_dword(buf));
u_int32_t read_be_dword(u_int8_t *ptr);