hook_pkt_event - packet event structure passed through to hooks
#include <sys/neti.h>
#include <sys/hook.h>
#include <sys/hook_event.h>
illumos DDI specific (illumos DDI).
The hook_pkt_event structure contains fields that relate to a packet in a
network protocol handler. This structure is passed through to a callback for
NH_PRE_ROUTING, NH_POST_ROUTING, NH_FORWARDING,
NH_LOOPBACK_IN and NH_LOOPBACK_OUT events.
A callback may only modify the hpe_hdr, hpe_mp and
hpe_mb fields.
The following table documents which fields can be safely used as a
result of each event.
Event hpe_ifp hpe_ofp hpe_hdr hpe_mp hpe_mb
----- ------- ------- ------- ------ ------
NH_PRE_ROUTING yes yes yes yes
NH_POST_ROUTING yes yes yes yes
NH_FORWARDING yes yes yes yes yes
NH_LOOPBACK_IN yes yes yes yes
NH_LOOPBACK_OUT yes yes yes yes
net_data_t hne_family;
phy_if_t hpe_ifp;
phy_if_t hpe_ofp;
void *hpe_hdr;
mblk_t *hpe_mp;
mblk_t *hpe_mb;
uint32_t hpe_flags;
The following fields are set for each event:
hne_family
The protocol family for this packet. This value matches
the corresponding value returned from a call to
net_protocol_lookup(9F).
hpe_ifp
The inbound interface for a packet.
hpe_ofp
The outbound interface for a packet.
hpe_hdr
Pointer to the start of the network protocol header
within an mblk_t structure.
hpe_mp
Pointer to the mblk_t pointer that points to the
first mblk_t structure in this packet.
hpe_mb
Pointer to the mblk_t structure that contains
hpe_hdr.
hpe_flags
This field is used to carry additional properties of
packets. The current collection of defined bits available is:
HPE_BROADCAST
This bit is set if the packet was recognized as a
broadcast packet from the link layer. The bit cannot be set if
HPE_MULTICAST is set, currently only possible with physical in packet
events.
HPE_MULTICAST
This set if the packet was recognized as a multicast
packet from the link layer. This bit cannot be set if HPE_BROADCAST is
set, currently only possible with physical in packet events.
| ATTRIBUTE
TYPE |
ATTRIBUTE VALUE |
| Interface Stability |
Committed |