mirror of
https://git.rtems.org/rtems-libbsd/
synced 2025-10-14 13:15:21 +08:00
Update to FreeBSD head 2016-08-23
Git mirror commit 9fe7c416e6abb28b1398fd3e5687099846800cfd.
This commit is contained in:
Sebastian Huber
176
freebsd/sys/kern/uipc_mbufhash.c
Normal file
176
freebsd/sys/kern/uipc_mbufhash.c
Normal file
@@ -0,0 +1,176 @@
|
||||
#include <machine/rtems-bsd-kernel-space.h>
|
||||
|
||||
/* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
|
||||
* Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <rtems/bsd/local/opt_inet.h>
|
||||
#include <rtems/bsd/local/opt_inet6.h>
|
||||
|
||||
#include <rtems/bsd/sys/param.h>
|
||||
#include <sys/mbuf.h>
|
||||
#include <sys/fnv_hash.h>
|
||||
|
||||
#include <net/ethernet.h>
|
||||
|
||||
#if defined(INET) || defined(INET6)
|
||||
#include <netinet/in.h>
|
||||
#endif
|
||||
|
||||
#ifdef INET
|
||||
#include <netinet/ip.h>
|
||||
#endif
|
||||
|
||||
#ifdef INET6
|
||||
#include <netinet/ip6.h>
|
||||
#endif
|
||||
|
||||
static const void *
|
||||
m_ether_tcpip_hash_gethdr(const struct mbuf *m, const u_int off,
|
||||
const u_int len, void *buf)
|
||||
{
|
||||
|
||||
if (m->m_pkthdr.len < (off + len)) {
|
||||
return (NULL);
|
||||
} else if (m->m_len < (off + len)) {
|
||||
m_copydata(m, off, len, buf);
|
||||
return (buf);
|
||||
}
|
||||
return (mtod(m, char *) + off);
|
||||
}
|
||||
|
||||
uint32_t
|
||||
m_ether_tcpip_hash_init(void)
|
||||
{
|
||||
uint32_t seed;
|
||||
|
||||
seed = arc4random();
|
||||
return (fnv_32_buf(&seed, sizeof(seed), FNV1_32_INIT));
|
||||
}
|
||||
|
||||
uint32_t
|
||||
m_ether_tcpip_hash(const uint32_t flags, const struct mbuf *m,
|
||||
const uint32_t key)
|
||||
{
|
||||
union {
|
||||
#ifdef INET
|
||||
struct ip ip;
|
||||
#endif
|
||||
#ifdef INET6
|
||||
struct ip6_hdr ip6;
|
||||
#endif
|
||||
struct ether_vlan_header vlan;
|
||||
uint32_t port;
|
||||
} buf;
|
||||
struct ether_header *eh;
|
||||
const struct ether_vlan_header *vlan;
|
||||
#ifdef INET
|
||||
const struct ip *ip;
|
||||
#endif
|
||||
#ifdef INET6
|
||||
const struct ip6_hdr *ip6;
|
||||
#endif
|
||||
uint32_t p;
|
||||
int off;
|
||||
uint16_t etype;
|
||||
|
||||
p = key;
|
||||
off = sizeof(*eh);
|
||||
if (m->m_len < off)
|
||||
goto done;
|
||||
eh = mtod(m, struct ether_header *);
|
||||
etype = ntohs(eh->ether_type);
|
||||
if (flags & MBUF_HASHFLAG_L2) {
|
||||
p = fnv_32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p);
|
||||
p = fnv_32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p);
|
||||
}
|
||||
/* Special handling for encapsulating VLAN frames */
|
||||
if ((m->m_flags & M_VLANTAG) && (flags & MBUF_HASHFLAG_L2)) {
|
||||
p = fnv_32_buf(&m->m_pkthdr.ether_vtag,
|
||||
sizeof(m->m_pkthdr.ether_vtag), p);
|
||||
} else if (etype == ETHERTYPE_VLAN) {
|
||||
vlan = m_ether_tcpip_hash_gethdr(m, off, sizeof(*vlan), &buf);
|
||||
if (vlan == NULL)
|
||||
goto done;
|
||||
|
||||
if (flags & MBUF_HASHFLAG_L2)
|
||||
p = fnv_32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p);
|
||||
etype = ntohs(vlan->evl_proto);
|
||||
off += sizeof(*vlan) - sizeof(*eh);
|
||||
}
|
||||
switch (etype) {
|
||||
#ifdef INET
|
||||
case ETHERTYPE_IP:
|
||||
ip = m_ether_tcpip_hash_gethdr(m, off, sizeof(*ip), &buf);
|
||||
if (ip == NULL)
|
||||
break;
|
||||
if (flags & MBUF_HASHFLAG_L3) {
|
||||
p = fnv_32_buf(&ip->ip_src, sizeof(struct in_addr), p);
|
||||
p = fnv_32_buf(&ip->ip_dst, sizeof(struct in_addr), p);
|
||||
}
|
||||
if (flags & MBUF_HASHFLAG_L4) {
|
||||
const uint32_t *ports;
|
||||
int iphlen;
|
||||
|
||||
switch (ip->ip_p) {
|
||||
case IPPROTO_TCP:
|
||||
case IPPROTO_UDP:
|
||||
case IPPROTO_SCTP:
|
||||
iphlen = ip->ip_hl << 2;
|
||||
if (iphlen < sizeof(*ip))
|
||||
break;
|
||||
off += iphlen;
|
||||
ports = m_ether_tcpip_hash_gethdr(m,
|
||||
off, sizeof(*ports), &buf);
|
||||
if (ports == NULL)
|
||||
break;
|
||||
p = fnv_32_buf(ports, sizeof(*ports), p);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
#endif
|
||||
#ifdef INET6
|
||||
case ETHERTYPE_IPV6:
|
||||
ip6 = m_ether_tcpip_hash_gethdr(m, off, sizeof(*ip6), &buf);
|
||||
if (ip6 == NULL)
|
||||
break;
|
||||
if (flags & MBUF_HASHFLAG_L3) {
|
||||
p = fnv_32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p);
|
||||
p = fnv_32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p);
|
||||
}
|
||||
if (flags & MBUF_HASHFLAG_L4) {
|
||||
uint32_t flow;
|
||||
|
||||
/* IPv6 flow label */
|
||||
flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
|
||||
p = fnv_32_buf(&flow, sizeof(flow), p);
|
||||
}
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
break;
|
||||
}
|
||||
done:
|
||||
return (p);
|
||||
}
|
||||
Reference in New Issue
Block a user