Hi Daniel. Thanks for your question. The spec for the odp_hash_crc32() API looks like this:
/** * Calculate CRC-32 * * Calculates CRC-32 over the data. The polynomial is 0x04c11db7. * * @param data Pointer to data * @param data_len Data length in bytes * @param init_val CRC generator initialization value * * @return CRC32 value */ uint32_t odp_hash_crc32(const void *data, uint32_t data_len, uint32_t init_val); This performs a hash on whatever you point to and returns a 32-bit value that is the CRC32 hash of those bytes. So it's up to you what you want to hash. Is this an IP address stored as a 32-bit value (e.g., in an IP header)? Then simply point to those four bytes. The API neither knows nor cares what those bytes might represent. It's simply performing a mathematical operation on them, meaning as long as the same input bytes are given it will produce the same result value. Happy New Year! On Mon, Dec 31, 2018 at 1:19 PM Daniel Feferman <dlfefer...@gmail.com> wrote: > > Hi all, > > I'm new into ODP and this is probably a too simple question, but I want to > make the CRC32 of an ipv4 source address (e.g.: 211.97.49.209) using the > function odp_hash_crc32(). However, I'm not quite sure what the data > pointer should contain, is it: > > -211.97.49.209 > -d3.61.31.d1 > -d36131d1 > -Any other option? > > Can someone help me with this question? > > Thanks, > Daniel