[lwip-devel] [bug #20346] IPv4 broadcasts ?

[S. Ali Tokmen]

Follow-up Comment #7, bug #20346 (project lwip):

Hello Zhenwei,

As Frédéric mentioned in his reply, the issue is on Analog Devices' side:

- During initialization, lwIP calls the external low_level_init function.
That function does the initialization of the Ethernet hardware, and is of
course hardware specific.
- That function takes as argument a pointer to a struct netif, which
describes the Ethernet device to lwIP.
- By default, netif's flags are all set to false. As a result, IP broadcast,
which is a feature requiring that flag to be set, is disabled by default.
- In the code example in lwIP's source code, the NETIF_FLAG_BROADCAST flag is
being set. On the other hand, for some reason, Analog Devices didn't set this
flag in their Ethernet driver.

Analog Devices has been made aware of the issue, and they've told me this
problem will be fixed in their IDE's next major release (VisualDSP++ 5.0).
This release should be out in late summer 2007.

Regards;

S. Ali Tokmen
http://ali.tokmen.com/

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