IPV6_PACKET Structure

C

typedef struct _IPV6_PACKET {
struct _IPV6_PACKET * next;
unsigned short payloadLen;
unsigned short headerLen;
unsigned short upperLayerHeaderLen;
unsigned short upperLayerChecksumOffset;
unsigned char upperLayerHeaderType;
union {
    struct {
    unsigned char reserved : 3;
    unsigned char useUnspecAddr : 1;
    unsigned char sourceSpecified : 1;
    unsigned char queued : 1;
    unsigned char addressType : 2;
    }
    unsigned char val;
} flags;
TCPIP_MAC_ADDR remoteMACAddr;
IPV6_PACKET_ACK_FNC ackFnc;
TCPIP_MAC_PACKET_ACK_FUNC macAckFnc;
void* ackParam;
void* clientData;
void * neighbor;
unsigned short offsetInSegment;
uint32_t queuedPacketTimeout;
TCPIP_NET_HANDLE netIfH;
IPV6_HEADER ipv6Header;
IPV6_DATA_SEGMENT_HEADER payload;
} IPV6_PACKET;

Description

Structure: IPV6_PACKET.

IPv6 packets are queued for future transmission.queuedPacketTimeout is used to time-out IPv6 queued packets.

Members


Members	Description
next	Next packet in a queue.
payloadLen	Amount of data in payload buffer.
headerLen	Total header length (IP header + IPv6 extension headers).
upperLayerHeaderLen	Total length of the upper layer header.
upperLayerChecksumOffset	Offset of the upper layer checksum.
upperLayerHeaderType	Type definition for the upper-layer header type.
useUnspecAddr: 1;	This packet should use the unspecified address.
sourceSpecified: 1;	The upper layer or application layer specified a source address.
queued : 1;	Packet has been queued.
addressType : 2;	IP_ADDRESS_TYPE_IPV6 or IP_ADDRESS_TYPE_IPV4.
remoteMACAddr	The packet's remote MAC address.
ackFnc	Function to be called when IPv6 is done with the packet.
macAckFnc	Function to be called when MAC is done with a TX packet.
ackParam	Parameter to be used.
clientData	Optional packet client data.
neighbor	The neighbor that the message was received from.
offsetInSegment	Offset used for storing fragment transmission information.
queuedPacketTimeout	Time out for IPv6 packets which are queued.
netIfH	Packet network interface.
ipv6Header	IPv6 header definition.
payload	IPv6 data segment payload.

Remarks

For IPv6 queuing the time out has to be 0. The queue is processed separately by the NDP.IPV6_PACKET_ACK_FNC() is called after the successful removal and inclusion of the packet.