diff options
Diffstat (limited to 'nuttx/net/Kconfig')
| -rw-r--r-- | nuttx/net/Kconfig | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/nuttx/net/Kconfig b/nuttx/net/Kconfig index ead407e5e..2481bb6b3 100644 --- a/nuttx/net/Kconfig +++ b/nuttx/net/Kconfig @@ -84,14 +84,16 @@ config NET_SOLINGER endif # NET_SOCKOPTS config NET_BUFSIZE - int "Network packet buffer size" + int "Network packet buffer size (MTU)" default 1294 if !NET_SLIP && NET_IPv6 default 590 if !NET_SLIP && !NET_IPv6 default 296 if NET_SLIP && !NET_IPv6 ---help--- - uIP buffer size. This size includes the size of TCP/UDP header, - the IP header, and the Ethernet header (assuming that the Ethernet - transport is used. + Packet buffer size. This size includes the TCP/UDP payload plus the + size of TCP/UDP header, the IP header, and the Ethernet header + (assuming that the Ethernet transport is used). This value is + normally referred to as the MTU (Maximum Transmission Unit); the + payload is the MSS (Maximum Segment Size). IPv4 hosts are required to be able to handle an MSS of at least 536 octets, resulting in a minimum buffer size of 536+20+20+14 = |