#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <pexpert/pexpert.h>
#define etherbroadcastaddr fugly
#include <net/if.h>
#include <net/route.h>
#include <net/if_llc.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_ether.h>
#include <net/if_gif.h>
#include <netinet/if_ether.h>
#include <netinet/in.h>
#include <net/kpi_interface.h>
#include <net/kpi_protocol.h>
#undef etherbroadcastaddr
#include <net/ether_if_module.h>
#include <sys/socketvar.h>
#include <net/if_vlan_var.h>
#if BOND
#include <net/if_bond_internal.h>
#endif
#if IF_BRIDGE
#include <net/if_bridgevar.h>
#endif
#include <net/dlil.h>
#define memcpy(x,y,z) bcopy(y, x, z)
SYSCTL_DECL(_net_link);
SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW|CTLFLAG_LOCKED, 0,
"Ethernet");
struct en_desc {
u_int16_t type;
u_int32_t protocol_family;
u_int32_t data[2];
};
#define ETHER_DESC_BLK_SIZE (10)
struct ether_desc_blk_str {
u_int32_t n_max_used;
u_int32_t n_count;
u_int32_t n_used;
struct en_desc block_ptr[1];
};
#define ETHER_DESC_HEADER_SIZE \
((size_t) offsetof(struct ether_desc_blk_str, block_ptr))
__private_extern__ u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
int
ether_del_proto(ifnet_t ifp, protocol_family_t protocol_family)
{
struct ether_desc_blk_str *desc_blk =
(struct ether_desc_blk_str *)ifp->if_family_cookie;
u_int32_t current = 0;
int found = 0;
if (desc_blk == NULL)
return (0);
for (current = desc_blk->n_max_used; current > 0; current--) {
if (desc_blk->block_ptr[current - 1].protocol_family ==
protocol_family) {
found = 1;
desc_blk->block_ptr[current - 1].type = 0;
desc_blk->n_used--;
}
}
if (desc_blk->n_used == 0) {
FREE(ifp->if_family_cookie, M_IFADDR);
ifp->if_family_cookie = 0;
} else {
for (; desc_blk->n_max_used > 0 &&
desc_blk->block_ptr[desc_blk->n_max_used - 1].type == 0;
desc_blk->n_max_used--)
;
}
return (0);
}
static int
ether_add_proto_internal(struct ifnet *ifp, protocol_family_t protocol,
const struct ifnet_demux_desc *demux)
{
struct en_desc *ed;
struct ether_desc_blk_str *desc_blk =
(struct ether_desc_blk_str *)ifp->if_family_cookie;
u_int32_t i;
switch (demux->type) {
case DLIL_DESC_ETYPE2:
if (demux->datalen != 2)
return (EINVAL);
break;
case DLIL_DESC_SAP:
if (demux->datalen != 3)
return (EINVAL);
break;
case DLIL_DESC_SNAP:
if (demux->datalen != 5)
return (EINVAL);
break;
default:
return (ENOTSUP);
}
if (desc_blk != NULL) {
switch (demux->type) {
case DLIL_DESC_ETYPE2:
for (i = 0; i < desc_blk->n_max_used; i++) {
if (desc_blk->block_ptr[i].type ==
DLIL_DESC_ETYPE2 &&
desc_blk->block_ptr[i].data[0] ==
*(u_int16_t*)demux->data) {
return (EADDRINUSE);
}
}
break;
case DLIL_DESC_SAP:
case DLIL_DESC_SNAP:
for (i = 0; i < desc_blk->n_max_used; i++) {
if (desc_blk->block_ptr[i].type ==
demux->type &&
bcmp(desc_blk->block_ptr[i].data,
demux->data, demux->datalen) == 0) {
return (EADDRINUSE);
}
}
break;
}
}
if (desc_blk == NULL || desc_blk->n_used == desc_blk->n_count) {
struct ether_desc_blk_str *tmp;
u_int32_t new_count = ETHER_DESC_BLK_SIZE;
u_int32_t new_size;
u_int32_t old_size = 0;
i = 0;
if (desc_blk) {
new_count += desc_blk->n_count;
old_size = desc_blk->n_count * sizeof (struct en_desc) +
ETHER_DESC_HEADER_SIZE;
i = desc_blk->n_used;
}
new_size = new_count * sizeof (struct en_desc) +
ETHER_DESC_HEADER_SIZE;
tmp = _MALLOC(new_size, M_IFADDR, M_WAITOK);
if (tmp == NULL) {
return (ENOMEM);
}
bzero(((char *)tmp) + old_size, new_size - old_size);
if (desc_blk) {
bcopy(desc_blk, tmp, old_size);
FREE(desc_blk, M_IFADDR);
}
desc_blk = tmp;
ifp->if_family_cookie = (uintptr_t)desc_blk;
desc_blk->n_count = new_count;
} else {
for (i = 0; i < desc_blk->n_count; i++) {
if (desc_blk->block_ptr[i].type == 0) {
break;
}
}
}
if (i + 1 > desc_blk->n_max_used) {
desc_blk->n_max_used = i + 1;
}
ed = &desc_blk->block_ptr[i];
ed->protocol_family = protocol;
ed->data[0] = 0;
ed->data[1] = 0;
switch (demux->type) {
case DLIL_DESC_ETYPE2:
ed->type = DLIL_DESC_ETYPE2;
ed->data[0] = *(u_int16_t*)demux->data;
break;
case DLIL_DESC_SAP:
ed->type = DLIL_DESC_SAP;
bcopy(demux->data, &ed->data[0], 3);
break;
case DLIL_DESC_SNAP: {
u_int8_t* pDest = ((u_int8_t*)&ed->data[0]) + 3;
ed->type = DLIL_DESC_SNAP;
bcopy(demux->data, pDest, 5);
break;
}
}
desc_blk->n_used++;
return (0);
}
int
ether_add_proto(ifnet_t ifp, protocol_family_t protocol,
const struct ifnet_demux_desc *demux_list, u_int32_t demux_count)
{
int error = 0;
u_int32_t i;
for (i = 0; i < demux_count; i++) {
error = ether_add_proto_internal(ifp, protocol, &demux_list[i]);
if (error) {
ether_del_proto(ifp, protocol);
break;
}
}
return (error);
}
int
ether_demux(ifnet_t ifp, mbuf_t m, char *frame_header,
protocol_family_t *protocol_family)
{
struct ether_header *eh = (struct ether_header *)(void *)frame_header;
u_short ether_type = eh->ether_type;
u_int16_t type;
u_int8_t *data;
u_int32_t i = 0;
struct ether_desc_blk_str *desc_blk =
(struct ether_desc_blk_str *)ifp->if_family_cookie;
u_int32_t maxd = desc_blk ? desc_blk->n_max_used : 0;
struct en_desc *ed = desc_blk ? desc_blk->block_ptr : NULL;
u_int32_t extProto1 = 0;
u_int32_t extProto2 = 0;
if (eh->ether_dhost[0] & 1) {
if (_ether_cmp(etherbroadcastaddr, eh->ether_dhost) == 0)
m->m_flags |= M_BCAST;
else
m->m_flags |= M_MCAST;
}
if (m->m_flags & M_HASFCS) {
m_adj(m, -ETHER_CRC_LEN);
m->m_flags &= ~M_HASFCS;
}
if (ifp->if_eflags & IFEF_BOND) {
*protocol_family = PF_BOND;
return (0);
}
if ((eh->ether_dhost[0] & 1) == 0) {
if (_ether_cmp(eh->ether_dhost, IF_LLADDR(ifp))) {
m->m_flags |= M_PROMISC;
}
}
if ((m->m_pkthdr.csum_flags & CSUM_VLAN_TAG_VALID) != 0) {
if (EVL_VLANOFTAG(m->m_pkthdr.vlan_tag) != 0) {
*protocol_family = PF_VLAN;
return (0);
}
m->m_pkthdr.csum_flags &= ~CSUM_VLAN_TAG_VALID;
} else if (ether_type == htons(ETHERTYPE_VLAN)) {
struct ether_vlan_header * evl;
evl = (struct ether_vlan_header *)(void *)frame_header;
if (m->m_len < ETHER_VLAN_ENCAP_LEN ||
ntohs(evl->evl_proto) == ETHERTYPE_VLAN ||
EVL_VLANOFTAG(ntohs(evl->evl_tag)) != 0) {
*protocol_family = PF_VLAN;
return (0);
}
ether_type = evl->evl_encap_proto = evl->evl_proto;
m->m_len -= ETHER_VLAN_ENCAP_LEN;
m->m_data += ETHER_VLAN_ENCAP_LEN;
m->m_pkthdr.len -= ETHER_VLAN_ENCAP_LEN;
m->m_pkthdr.csum_flags = 0;
} else if (ether_type == htons(ETHERTYPE_ARP))
m->m_pkthdr.pkt_flags |= PKTF_INET_RESOLVE;
data = mtod(m, u_int8_t*);
if (ntohs(ether_type) <= 1500) {
bcopy(data, &extProto1, sizeof (u_int32_t));
if ((extProto1 & htonl(0xFFFFFF00)) == htonl(0xAAAA0300)) {
type = DLIL_DESC_SNAP;
bcopy(data + sizeof (u_int32_t), &extProto2,
sizeof (u_int32_t));
extProto1 &= htonl(0x000000FF);
} else {
type = DLIL_DESC_SAP;
extProto1 &= htonl(0xFFFFFF00);
}
} else {
type = DLIL_DESC_ETYPE2;
}
switch (type) {
case DLIL_DESC_ETYPE2:
for (i = 0; i < maxd; i++) {
if ((ed[i].type == type) &&
(ed[i].data[0] == ether_type)) {
*protocol_family = ed[i].protocol_family;
return (0);
}
}
break;
case DLIL_DESC_SAP:
for (i = 0; i < maxd; i++) {
if ((ed[i].type == type) &&
(ed[i].data[0] == extProto1)) {
*protocol_family = ed[i].protocol_family;
return (0);
}
}
break;
case DLIL_DESC_SNAP:
for (i = 0; i < maxd; i++) {
if ((ed[i].type == type) &&
(ed[i].data[0] == extProto1) &&
(ed[i].data[1] == extProto2)) {
*protocol_family = ed[i].protocol_family;
return (0);
}
}
break;
}
return (ENOENT);
}
#if KPI_INTERFACE_EMBEDDED
int
ether_frameout(struct ifnet *ifp, struct mbuf **m,
const struct sockaddr *ndest, const char *edst,
const char *ether_type, u_int32_t *prepend_len, u_int32_t *postpend_len)
#else
int
ether_frameout(struct ifnet *ifp, struct mbuf **m,
const struct sockaddr *ndest, const char *edst,
const char *ether_type)
#endif
{
#if KPI_INTERFACE_EMBEDDED
return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
prepend_len, postpend_len));
#else
return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
NULL, NULL));
#endif
}
int
ether_frameout_extended(struct ifnet *ifp, struct mbuf **m,
const struct sockaddr *ndest, const char *edst,
const char *ether_type, u_int32_t *prepend_len, u_int32_t *postpend_len)
{
struct ether_header *eh;
int hlen;
hlen = ETHER_HDR_LEN;
if ((ifp->if_flags & IFF_SIMPLEX) &&
((*m)->m_flags & M_LOOP) && lo_ifp != NULL) {
if ((*m)->m_flags & M_BCAST) {
struct mbuf *n = m_copy(*m, 0, (int)M_COPYALL);
if (n != NULL) {
dlil_output(lo_ifp, ndest->sa_family,
n, NULL, ndest, 0, NULL);
}
} else if (_ether_cmp(edst, IF_LLADDR(ifp)) == 0) {
dlil_output(lo_ifp, ndest->sa_family, *m,
NULL, ndest, 0, NULL);
return (EJUSTRETURN);
}
}
M_PREPEND(*m, sizeof (struct ether_header), M_DONTWAIT);
if (*m == NULL)
return (EJUSTRETURN);
if (prepend_len != NULL)
*prepend_len = sizeof (struct ether_header);
if (postpend_len != NULL)
*postpend_len = 0;
eh = mtod(*m, struct ether_header *);
(void) memcpy(&eh->ether_type, ether_type, sizeof(eh->ether_type));
(void) memcpy(eh->ether_dhost, edst, ETHER_ADDR_LEN);
ifnet_lladdr_copy_bytes(ifp, eh->ether_shost, ETHER_ADDR_LEN);
return (0);
}
errno_t
ether_check_multi(ifnet_t ifp, const struct sockaddr *proto_addr)
{
#pragma unused(ifp)
errno_t result = EAFNOSUPPORT;
const u_char *e_addr;
switch(proto_addr->sa_family) {
case AF_UNSPEC:
e_addr = (const u_char*)&proto_addr->sa_data[0];
if ((e_addr[0] & 0x01) != 0x01)
result = EADDRNOTAVAIL;
else
result = 0;
break;
case AF_LINK:
e_addr = CONST_LLADDR((const struct sockaddr_dl*)
(uintptr_t)(size_t)proto_addr);
if ((e_addr[0] & 0x01) != 0x01)
result = EADDRNOTAVAIL;
else
result = 0;
break;
}
return (result);
}
int
ether_ioctl(ifnet_t ifp, u_int32_t command, void *data)
{
#pragma unused(ifp, command, data)
return (EOPNOTSUPP);
}
__private_extern__ int
ether_family_init(void)
{
errno_t error = 0;
if ((error = proto_register_plumber(PF_INET, APPLE_IF_FAM_ETHERNET,
ether_attach_inet, ether_detach_inet)) != 0) {
printf("proto_register_plumber failed for PF_INET error=%d\n",
error);
goto done;
}
#if INET6
if ((error = proto_register_plumber(PF_INET6, APPLE_IF_FAM_ETHERNET,
ether_attach_inet6, ether_detach_inet6)) != 0) {
printf("proto_register_plumber failed for PF_INET6 error=%d\n",
error);
goto done;
}
#endif
#if VLAN
vlan_family_init();
#endif
#if BOND
bond_family_init();
#endif
#if IF_BRIDGE
bridgeattach(0);
#endif
done:
return (error);
}