SKB_CHECKSUM_COMPLET(9) Linux Networking SKB_CHECKSUM_COMPLET(9)NAME
skb_checksum_complete - Calculate checksum of an entire packet
SYNOPSIS
__sum16 skb_checksum_complete(struct sk_buff * skb);
ARGUMENTS
skb
packet to process
DESCRIPTION
This function calculates the checksum over the entire packet plus the value of skb->csum. The latter can be used to supply the checksum of
a pseudo header as used by TCP/UDP. It returns the checksum.
For protocols that contain complete checksums such as ICMP/TCP/UDP, this function can be used to verify that checksum on received packets.
In that case the function should return zero if the checksum is correct. In particular, this function will return zero if skb->ip_summed is
CHECKSUM_UNNECESSARY which indicates that the hardware has already verified the correctness of the checksum.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SKB_CHECKSUM_COMPLET(9)
Check Out this Related Man Page
net_ispartialchecksum(9F) Kernel Functions for Drivers net_ispartialchecksum(9F)NAME
net_ispartialchecksum - indicate if a packet is being scheduled for hardware checksum calculation
SYNOPSIS
#include <sys/neti.h>
int net_ispartialchecksum(const net_data_t net, mblk_t *mb);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
net value returned from a successful call to net_protocol_lookup(9F).
mb the mblk structure holding a packet that is the subject of this query.
DESCRIPTION
The net_ispartialchecksum() function looks at the fields within the mblk structure to determine if the packet contained inside contains
headers with only partial checksum values. Partial checksum values are stored inside headers when the calculation of the complete checksum
is being handled by the hardware.
RETURN VALUES
The net_ispartialchecksum() function returns:
-1 The network protocol does not support this function.
0 The packet does not contain partial checksums.
If a packet is marked for hardware checksum'ing, the following values are returned:
NET_HCK_L3_FULL Complete layer 3 checksum calculated
NET_HCK_L3_PART Partial layer 3 checksum calculated
NET_HCK_L4_FULL Complete layer 4 checksum calculated
NET_HCK_L4_PART Partial layer 4 checksum calculated
CONTEXT
The net_ispartialchecksum() function may be called from user, kernel, or interrupt context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
SEE ALSO net_isvalidchecksum(9F), net_protocol_lookup(9F), attributes(5)SunOS 5.11 1 May 2008 net_ispartialchecksum(9F)
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