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Diffstat (limited to 'board')
| -rw-r--r-- | board/sandbox/README.sandbox | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/board/sandbox/README.sandbox b/board/sandbox/README.sandbox index 9f5d3f7..08489e3 100644 --- a/board/sandbox/README.sandbox +++ b/board/sandbox/README.sandbox @@ -241,6 +241,28 @@ dhcp set serverip WWW.XXX.YYY.ZZZ tftpboot u-boot.bin +The bridge also support (to a lesser extent) the localhost inderface, 'lo'. + +The 'lo' interface cannot use the RAW AF_PACKET API because the lo interface +doesn't support Ethernet-level traffic. It is a higher-level interface that is +expected only to be used at the AF_INET level of the API. As such, the most raw +we can get on that interface is the RAW AF_INET API on UDP. This allows us to +set the IP_HDRINCL option to include everything except the Ethernet header in +the packets we send and receive. + +Because only UDP is supported, ICMP traffic will not work, so expect that ping +commands will time out. + +The default device tree for sandbox includes an entry for lo on the sandbox +host machine whose alias is "eth5". The following is an example of a network +operation being tested on the lo interface. + +TFTP +.... + +set ethact eth5 +tftpboot u-boot.bin + SPI Emulation ------------- |