Differential D26436 Diff 78568 head/sys/net/if_ethersubr.c

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head/sys/net/if_ethersubr.c

Show First 20 Lines • Show All 435 Lines • ▼ Show 20 Lines	bad: if (m != NULL)

/* Continue with link-layer output */		/* Continue with link-layer output */
return ether_output_frame(ifp, m);		return ether_output_frame(ifp, m);
}		}

static bool		static bool
ether_set_pcp(struct mbuf *mp, struct ifnet ifp, uint8_t pcp)		ether_set_pcp(struct mbuf *mp, struct ifnet ifp, uint8_t pcp)
{		{
		struct ether_8021q_tag qtag;
struct ether_header *eh;		struct ether_header *eh;

eh = mtod(mp, struct ether_header );		eh = mtod(mp, struct ether_header );
if (ntohs(eh->ether_type) == ETHERTYPE_VLAN \|\|		if (ntohs(eh->ether_type) == ETHERTYPE_VLAN \|\|
ether_8021q_frame(mp, ifp, ifp, 0, pcp))		ntohs(eh->ether_type) == ETHERTYPE_QINQ)
return (true);		return (true);

		qtag.vid = 0;
		qtag.pcp = pcp;
		qtag.proto = ETHERTYPE_VLAN;
		if (ether_8021q_frame(mp, ifp, ifp, &qtag))
		return (true);
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);		if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
return (false);		return (false);
}		}

/*		/*
* Ethernet link layer output routine to send a raw frame to the device.		* Ethernet link layer output routine to send a raw frame to the device.
*		*
* This assumes that the 14 byte Ethernet header is present and contiguous		* This assumes that the 14 byte Ethernet header is present and contiguous
▲ Show 20 Lines • Show All 153 Lines • ▼ Show 20 Lines	else {
return;		return;
}		}
}		}

/*		/*
* If the hardware did not process an 802.1Q tag, do this now,		* If the hardware did not process an 802.1Q tag, do this now,
* to allow 802.1P priority frames to be passed to the main input		* to allow 802.1P priority frames to be passed to the main input
* path correctly.		* path correctly.
* TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels.
*/		*/
if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) {		if ((m->m_flags & M_VLANTAG) == 0 &&
		((etype == ETHERTYPE_VLAN) \|\| (etype == ETHERTYPE_QINQ))) {
struct ether_vlan_header *evl;		struct ether_vlan_header *evl;

if (m->m_len < sizeof(*evl) &&		if (m->m_len < sizeof(*evl) &&
(m = m_pullup(m, sizeof(*evl))) == NULL) {		(m = m_pullup(m, sizeof(*evl))) == NULL) {
#ifdef DIAGNOSTIC		#ifdef DIAGNOSTIC
if_printf(ifp, "cannot pullup VLAN header\n");		if_printf(ifp, "cannot pullup VLAN header\n");
#endif		#endif
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);		if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
▲ Show 20 Lines • Show All 668 Lines • ▼ Show 20 Lines	if (data != NULL) {
bpf_mtap(bp, &mb);		bpf_mtap(bp, &mb);
} else		} else
bpf_mtap2(bp, &vlan, sizeof(vlan), m);		bpf_mtap2(bp, &vlan, sizeof(vlan), m);
m->m_len += sizeof(struct ether_header);		m->m_len += sizeof(struct ether_header);
m->m_data -= sizeof(struct ether_header);		m->m_data -= sizeof(struct ether_header);
}		}

struct mbuf *		struct mbuf *
ether_vlanencap(struct mbuf *m, uint16_t tag)		ether_vlanencap_proto(struct mbuf *m, uint16_t tag, uint16_t proto)
{		{
struct ether_vlan_header *evl;		struct ether_vlan_header *evl;

M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT);		M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT);
if (m == NULL)		if (m == NULL)
return (NULL);		return (NULL);
/* M_PREPEND takes care of m_len, m_pkthdr.len for us */		/* M_PREPEND takes care of m_len, m_pkthdr.len for us */

if (m->m_len < sizeof(*evl)) {		if (m->m_len < sizeof(*evl)) {
m = m_pullup(m, sizeof(*evl));		m = m_pullup(m, sizeof(*evl));
if (m == NULL)		if (m == NULL)
return (NULL);		return (NULL);
}		}

/*		/*
* Transform the Ethernet header into an Ethernet header		* Transform the Ethernet header into an Ethernet header
* with 802.1Q encapsulation.		* with 802.1Q encapsulation.
*/		*/
evl = mtod(m, struct ether_vlan_header *);		evl = mtod(m, struct ether_vlan_header *);
bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN,		bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN,
(char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN);		(char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN);
evl->evl_encap_proto = htons(ETHERTYPE_VLAN);		evl->evl_encap_proto = htons(proto);
evl->evl_tag = htons(tag);		evl->evl_tag = htons(tag);
return (m);		return (m);
}		}

static SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW \| CTLFLAG_MPSAFE, 0,		static SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW \| CTLFLAG_MPSAFE, 0,
"IEEE 802.1Q VLAN");		"IEEE 802.1Q VLAN");
static SYSCTL_NODE(_net_link_vlan, PF_LINK, link,		static SYSCTL_NODE(_net_link_vlan, PF_LINK, link,
CTLFLAG_RW \| CTLFLAG_MPSAFE, 0,		CTLFLAG_RW \| CTLFLAG_MPSAFE, 0,
Show All 12 Lines
*/		*/
int vlan_mtag_pcp = 0;		int vlan_mtag_pcp = 0;
SYSCTL_INT(_net_link_vlan, OID_AUTO, mtag_pcp, CTLFLAG_RW,		SYSCTL_INT(_net_link_vlan, OID_AUTO, mtag_pcp, CTLFLAG_RW,
&vlan_mtag_pcp, 0,		&vlan_mtag_pcp, 0,
"Retain VLAN PCP information as packets are passed up the stack");		"Retain VLAN PCP information as packets are passed up the stack");

bool		bool
ether_8021q_frame(struct mbuf *mp, struct ifnet ife, struct ifnet *p,		ether_8021q_frame(struct mbuf *mp, struct ifnet ife, struct ifnet *p,
uint16_t vid, uint8_t pcp)		struct ether_8021q_tag *qtag)
{		{
struct m_tag *mtag;		struct m_tag *mtag;
int n;		int n;
uint16_t tag;		uint16_t tag;
static const char pad[8]; /* just zeros */		static const char pad[8]; /* just zeros */

/*		/*
* Pad the frame to the minimum size allowed if told to.		* Pad the frame to the minimum size allowed if told to.
Show All 20 Lines	if (n > 0) {
return (false);		return (false);
}		}
}		}

/*		/*
* If PCP is set in mbuf, use it		* If PCP is set in mbuf, use it
*/		*/
if ((*mp)->m_flags & M_VLANTAG) {		if ((*mp)->m_flags & M_VLANTAG) {
pcp = EVL_PRIOFTAG((*mp)->m_pkthdr.ether_vtag);		qtag->pcp = EVL_PRIOFTAG((*mp)->m_pkthdr.ether_vtag);
}		}

/*		/*
* If underlying interface can do VLAN tag insertion itself,		* If underlying interface can do VLAN tag insertion itself,
* just pass the packet along. However, we need some way to		* just pass the packet along. However, we need some way to
* tell the interface where the packet came from so that it		* tell the interface where the packet came from so that it
* knows how to find the VLAN tag to use, so we attach a		* knows how to find the VLAN tag to use, so we attach a
* packet tag that holds it.		* packet tag that holds it.
*/		*/
if (vlan_mtag_pcp && (mtag = m_tag_locate(*mp, MTAG_8021Q,		if (vlan_mtag_pcp && (mtag = m_tag_locate(*mp, MTAG_8021Q,
MTAG_8021Q_PCP_OUT, NULL)) != NULL)		MTAG_8021Q_PCP_OUT, NULL)) != NULL)
tag = EVL_MAKETAG(vid, (uint8_t )(mtag + 1), 0);		tag = EVL_MAKETAG(qtag->vid, (uint8_t )(mtag + 1), 0);
else		else
tag = EVL_MAKETAG(vid, pcp, 0);		tag = EVL_MAKETAG(qtag->vid, qtag->pcp, 0);
if (p->if_capenable & IFCAP_VLAN_HWTAGGING) {		if ((p->if_capenable & IFCAP_VLAN_HWTAGGING) &&
		(qtag->proto == ETHERTYPE_VLAN)) {
(*mp)->m_pkthdr.ether_vtag = tag;		(*mp)->m_pkthdr.ether_vtag = tag;
(*mp)->m_flags \|= M_VLANTAG;		(*mp)->m_flags \|= M_VLANTAG;
} else {		} else {
mp = ether_vlanencap(mp, tag);		mp = ether_vlanencap_proto(mp, tag, qtag->proto);
if (*mp == NULL) {		if (*mp == NULL) {
if_printf(ife, "unable to prepend 802.1Q header");		if_printf(ife, "unable to prepend 802.1Q header");
return (false);		return (false);
}		}
}		}
return (true);		return (true);
}		}

▲ Show 20 Lines • Show All 47 Lines • Show Last 20 Lines