net_ispartialchecksum(9f)

1net_ispartialchecksum(9F)Kernel Functions for Driversnet_ispartialchecksum(9F)
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NAME

6       net_ispartialchecksum  -  indicate  if  a packet is being scheduled for
7       hardware checksum calculation
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SYNOPSIS

10       #include <sys/neti.h>
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12       int net_ispartialchecksum(const net_data_t net, mblk_t *mb);
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INTERFACE LEVEL

16       Solaris DDI specific (Solaris DDI).
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PARAMETERS

19       net    value  returned   from   a   successful   call   to   net_proto‐
20              col_lookup(9F).
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23       mb    the  mblk  structure holding a packet that is the subject of this
24             query.
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DESCRIPTION

28       The net_ispartialchecksum() function looks at  the  fields  within  the
29       mblk  structure  to  determine  if the packet contained inside contains
30       headers with only partial checksum values. Partial checksum values  are
31       stored  inside headers when the calculation of the complete checksum is
32       being handled by the hardware.
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RETURN VALUES

35       The net_ispartialchecksum() function returns:
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37       -1    The network protocol does not support this function.
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40       0     The packet does not contain partial checksums.
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44       If a packet is marked for hardware checksum'ing, the  following  values
45       are returned:
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47       NET_HCK_L3_FULL    Complete layer 3 checksum calculated
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50       NET_HCK_L3_PART    Partial layer 3 checksum calculated
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53       NET_HCK_L4_FULL    Complete layer 4 checksum calculated
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56       NET_HCK_L4_PART    Partial layer 4 checksum calculated
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CONTEXT

60       The  net_ispartialchecksum() function may be called from user,  kernel,
61       or interrupt context.
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ATTRIBUTES

64       See attributes(5) for descriptions of the following attributes:
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69       ┌─────────────────────────────┬─────────────────────────────┐
70       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
71       ├─────────────────────────────┼─────────────────────────────┤
72       │Availability                 │SUNWcsu                      │
73       ├─────────────────────────────┼─────────────────────────────┤
74       │Interface Stability          │Committed                    │
75       └─────────────────────────────┴─────────────────────────────┘
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