sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

net/Kconfig: Improved default values and comments

Browse Source
This commit is contained in:
Gregory Nutt 2014-01-16 16:08:51 -06:00
parent 2382af1e7b
commit 90974e2b0b
1 changed files with 54 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
net/Kconfig
View File

@ -84,10 +84,20 @@ endif # NET_SOCKOPTS
config NET_BUFSIZE
int "Network packet size"
default 562 if !NET_SLIP
default 296 if NET_SLIP
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. Default: 562
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.
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 =
590 (For SLIP 256+20+20 = 296).
IPv6 hosts are required to be able to handle an MSS of 1220 octets,
resulting in a minimum buffer size of of 1220+20+40+14 = 1294
config NET_TCPURGDATA
bool "Urgent data"
@ -135,14 +145,23 @@ if NET_TCP_READAHEAD
config NET_TCP_READAHEAD_BUFSIZE
int "TCP/IP read-ahead buffer size"
default 562
default 1220 if !NET_SLIP && NET_IPv6
default 536 if !NET_SLIP && !NET_IPv6
default 256 if NET_SLIP && !NET_IPv6
---help---
Read-ahead buffers allows buffering of TCP/IP packets when there is no
receive in place to catch the TCP packet. In that case, the packet
will be retained in the NuttX read-ahead buffers.
This setting specifies the size of one TCP/IP read-ahead buffer.
This should best be a equal to the maximum packet size (NET_BUFSIZE).
This should best be a equal to the maximum packet payload size (MSS).
Optimally, the size of the read-ahead buffer will should the maximum
size of an incoming TCP packet payload (MSS). This MSS value is
determined by NET_BUFSIZE minus the size of TCP, IP, and Ethernet
headers (assuming you are using the Ethernet transport). IPv4 hosts
are required to be able to handle an MSS of 536 octets and IPv6 hosts
are required to be able to handle an MSS of 1220 octets.
config NET_NTCP_READAHEAD_BUFFERS
int "Number of TCP/IP read-ahead buffers"
@ -170,11 +189,21 @@ if NET_TCP_WRITE_BUFFERS
config NET_TCP_WRITE_BUFSIZE
int "TCP/IP write buffer size"
default 562
default 1220 if !NET_SLIP && NET_IPv6
default 536 if !NET_SLIP && !NET_IPv6
default 256 if NET_SLIP && !NET_IPv6
---help---
Write buffers allows buffering of ongoing TCP/IP packets, providing
for higher performance, streamed output.
The size of the write buffer will determine the maximum size of an
outgoing TCP packet payload (MSS). This value should NOT exceed the
maximum MSS which is determined by NET_BUFSIZE minus the size of
TCP, IP, and Ethernet headers (assuming you are using the Ethernet
transport). IPv4 hosts are required to be able to handle an MSS
of 536 octets and IPv6 hosts are required to be able to handle an
MSS of 1220 octets.
This setting specifies the size of one TCP/IP write buffer. This
should best be a equal to the maximum packet size (NET_BUFSIZE).
@ -258,6 +287,7 @@ config NET_UDP
Enable or disable UDP networking support.
if NET_UDP
config NET_UDP_CHECKSUMS
bool "UDP checksums"
default n
@ -292,7 +322,7 @@ config NET_RXAVAIL
NOTE: If this option is enabled, the driver must support the
rxavail() method in the uip_driver_s structure.
endif
endif # NET_UDP
endmenu
config NET_ICMP
@ -304,6 +334,7 @@ config NET_ICMP
for sending replies to received ECHO (ping) requests.
if NET_ICMP
config NET_ICMP_PING
bool "ICMP ping interfaces"
default n
@ -317,7 +348,7 @@ config NET_PINGADDRCONF
---help---
Use "ping" packet for setting IP address
endif
endif # NET_ICMP
config NET_IGMP
bool "IGMPv2 clientsupport"
@ -327,6 +358,7 @@ config NET_IGMP
Enable IGMPv2 client support.
if NET_IGMP
config PREALLOC_IGMPGROUPS
int "Number of pre-allocated IGMP groups"
default 4
@ -334,9 +366,7 @@ config PREALLOC_IGMPGROUPS
Pre-allocated IGMP groups are used only if needed from interrupt
level group created (by the IGMP server). Default: 4.
endif
if NET
endif # NET_IGMP
config NET_STATISTICS
bool "Collect network statistics"
@ -346,12 +376,14 @@ config NET_STATISTICS
config NET_RECEIVE_WINDOW
int "Receive window size"
default 562
default 1220 if !NET_SLIP && NET_IPv6
default 536 if !NET_SLIP && !NET_IPv6
default 256 if NET_SLIP && !NET_IPv6
---help---
The size of the advertised receiver's window. Should be set low
(i.e., to the size of the NET_BUFSIZE) if the application is slow
to process incoming data, or high (32768 bytes) if the application
processes data quickly.
(i.e., to the size of the MSS) if the application is slow to process
incoming data, or high (32768 bytes) if the application processes
data quickly.
config NET_ARPTAB_SIZE
int "ARP table size"
@ -402,16 +434,15 @@ config NET_SLIP
defined in the NuttX configuration file, then SLIP will be supported.
The basic differences between the SLIP and Ethernet configurations is
that when SLIP is selected:
* The link level header (that comes before the IP header) is omitted.
* All MAC address processing is suppressed.
* ARP is disabled.
* The link level header (that comes before the IP header) is omitted.
* All MAC address processing is suppressed.
* ARP is disabled.
If NET_SLIP is not selected, then Ethernet will be used (there is
no need to define anything special in the configuration file to use
Ethernet -- it is the default).
endif
if NET_SLIP
config SLIP_NINTERFACES
@ -434,5 +465,5 @@ config SLIP_DEFPRIO
---help---
The priority of the SLIP RX and TX tasks. Default: 128
endif
endif
endif # NET_SLIP
endif # NET