diff options
| -rw-r--r-- | share/man/man9/mbuf.9 | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/share/man/man9/mbuf.9 b/share/man/man9/mbuf.9 index 5149d9a..de2519a 100644 --- a/share/man/man9/mbuf.9 +++ b/share/man/man9/mbuf.9 @@ -823,14 +823,14 @@ The TCP checksum is to be computed. (See below.) The UDP checksum is to be computed. (See below.) .El .Pp -Should the TCP or UDP checksum be calculated in the hardware, +Should a TCP or UDP checksum be offloaded to the hardware, the field .Va csum_data will contain the byte offset of the checksum field relative to the end of the IP header. In this case, the checksum field will be initially set by the TCP/IP module to the checksum of the pseudo header -defined by the protocol specification. +defined by the TCP and UDP specifications. .Pp For outbound packets which have been fragmented by the host CPU, the following will also be true, @@ -884,11 +884,11 @@ Can be set only along with .Dv CSUM_DATA_VALID to indicate that the IP data checksum found in .Va csum_data -allows for the pseudo header. +allows for the pseudo header defined by the TCP and UDP specifications. Otherwise the checksum of the pseudo header must be calculated by the host CPU and added to .Va csum_data -to obtain the final checksum to be used for validation purposes. +to obtain the final checksum to be used for TCP or UDP validation purposes. .El .Pp If a particular network interface just indicates success or |
