struct inpcbgroup * in_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, struct in_addr laddr, u_short lport, struct in_addr faddr, 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_ip4_4tuple(faddr, fport, laddr, lport); #else hash = faddr.s_addr ^ fport; #endif break; case IPI_HASHFIELDS_2TUPLE: #ifdef RSS hash = rss_hash_ip4_2tuple(faddr, laddr); #else hash = faddr.s_addr ^ laddr.s_addr; #endif break; default: hash = 0; } return (&pcbinfo->ipi_pcbgroups[in_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 turns up with a 2-tuple hash, or if an RSS hash is present but * RSS is not compiled into the kernel. */ struct inpcbgroup * in_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_IPV4) || (pcbinfo->ipi_hashfields == IPI_HASHFIELDS_4TUPLE && hashtype == M_HASHTYPE_RSS_UDP_IPV4) || (pcbinfo->ipi_hashfields == IPI_HASHFIELDS_2TUPLE && hashtype == M_HASHTYPE_RSS_IPV4)) return (&pcbinfo->ipi_pcbgroups[ in_pcbgroup_getbucket(pcbinfo, hash)]); #endif return (NULL); }
struct inpcbgroup * in_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, struct in_addr laddr, u_short lport, struct in_addr faddr, u_short fport) { uint32_t hash; switch (pcbinfo->ipi_hashfields) { case IPI_HASHFIELDS_4TUPLE: hash = faddr.s_addr ^ fport; break; case IPI_HASHFIELDS_2TUPLE: hash = faddr.s_addr ^ laddr.s_addr; break; default: hash = 0; } return (&pcbinfo->ipi_pcbgroups[in_pcbgroup_getbucket(pcbinfo, hash)]); }