diff options
Diffstat (limited to 'nuttx/net/Kconfig')
| -rw-r--r-- | nuttx/net/Kconfig | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/nuttx/net/Kconfig b/nuttx/net/Kconfig index d3a26a587..ccc01a6dc 100644 --- a/nuttx/net/Kconfig +++ b/nuttx/net/Kconfig @@ -40,7 +40,7 @@ config NET_NOINTS bool "Not interrupt driven" default n ---help--- - NET_NOINT indicates that uIP is not called from the interrupt level. + NET_NOINT indicates that uIP is not called from the interrupt level. If NET_NOINTS is defined, critical sections will be managed with semaphores; Otherwise, it assumed that uIP will be called from interrupt level handling and critical sections will be managed by enabling and disabling interrupts. @@ -228,6 +228,22 @@ config NET_BROADCAST ---help--- Incoming UDP broadcast support +config NET_RXAVAIL + bool "Driver-based UDP backlog" + default n + ---help--- + One problem with UDP communications is that, unlike TCP/IP, there is + no backlog of UDP packets. So if you are listening at the precise + moment that the UDP packet is sent, it will not be received. This + is not incompatible with the properties of UDP, but can result in + bad performance if packets are missed, time out, and are resent. + + Some Ethernet controllers have built-in RAM and the drivers can + support retention of UDP packets in that RAM. If the drivers + supports such a capability, this option may be enabled to use it. + NOTE: If this option is enabled, the driver must support the + rxavail() method in the uip_driver_s structure. + endif endmenu @@ -317,32 +333,32 @@ config NET_SLIP network settings: NET_NOINTS and NET_MULTIBUFFER. NET_BUFSIZE *must* be set to 296. Other optional configuration - settings that affect the SLIP driver: NET_STATISTICS. + settings that affect the SLIP driver: NET_STATISTICS. Default: Ethernet SLIP supports point-to-point IP communications over a serial port. The default data link layer for uIP is Ethernet. If NET_SLIP is 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: + that when SLIP is selected: - * The link level header (that comes before the IP header) is omitted. - * All MAC address processing is suppressed. + * 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). + Ethernet -- it is the default). endif if NET_SLIP -config SLIP_NINTERFACES +config SLIP_NINTERFACES int "Number of SLIP interfaces" default 1 ---help--- Selects the number of physical SLIP - interfaces to support. + interfaces to support. Default: 1 config SLIP_STACKSIZE |