struct inpcbgroup *
in6_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, const struct in6_addr *laddrp,
u_short lport, const struct in6_addr *faddrp, u_short fport)
{
uint32_t hash;
/*
* RSS note: we pass foreign addr/port as source, and local addr/port
* as destination, as we want to align with what the hardware is
* doing.
*/
switch (pcbinfo->ipi_hashfields) {
case IPI_HASHFIELDS_4TUPLE:
#ifdef RSS
hash = rss_hash_ip6_4tuple(faddrp, fport, laddrp, lport);
#else
hash = faddrp->s6_addr32[3] ^ fport;
#endif
break;
case IPI_HASHFIELDS_2TUPLE:
#ifdef RSS
hash = rss_hash_ip6_2tuple(faddrp, laddrp);
#else
hash = faddrp->s6_addr32[3] ^ laddrp->s6_addr32[3];
#endif
break;
default:
hash = 0;
}
return (&pcbinfo->ipi_pcbgroups[in6_pcbgroup_getbucket(pcbinfo,
hash)]);
}
/*
* Map a (hashtype, hash) tuple into a connection group, or NULL if the hash
* information is insufficient to identify the pcbgroup. This might occur if
* a TCP packet turnsup with a 2-tuple hash, or if an RSS hash is present but
* RSS is not compiled into the kernel.
*/
struct inpcbgroup *
in6_pcbgroup_byhash(struct inpcbinfo *pcbinfo, u_int hashtype, uint32_t hash)
{
#ifdef RSS
if ((pcbinfo->ipi_hashfields == IPI_HASHFIELDS_4TUPLE &&
hashtype == M_HASHTYPE_RSS_TCP_IPV6) ||
(pcbinfo->ipi_hashfields == IPI_HASHFIELDS_4TUPLE &&
hashtype == M_HASHTYPE_RSS_UDP_IPV6) ||
(pcbinfo->ipi_hashfields == IPI_HASHFIELDS_2TUPLE &&
hashtype == M_HASHTYPE_RSS_IPV6))
return (&pcbinfo->ipi_pcbgroups[
in6_pcbgroup_getbucket(pcbinfo, hash)]);
#endif
return (NULL);
}
struct inpcbgroup *
in6_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, const struct in6_addr *laddrp,
u_short lport, const struct in6_addr *faddrp, u_short fport)
{
uint32_t hash;
switch (pcbinfo->ipi_hashfields) {
case IPI_HASHFIELDS_4TUPLE:
hash = faddrp->s6_addr32[3] ^ fport;
break;
case IPI_HASHFIELDS_2TUPLE:
hash = faddrp->s6_addr32[3] ^ laddrp->s6_addr32[3];
break;
default:
hash = 0;
}
return (&pcbinfo->ipi_pcbgroups[in6_pcbgroup_getbucket(pcbinfo,
hash)]);
}