lwIP | Add GRETH/GRETH_GBIT driver (!40)

Thu Apr 30 16:53:41 UTC 2026

Kinsey Moore started a new discussion on rtemslwip/greth/include/lwipbspopts.h: https://gitlab.rtems.org/rtems/pkg/rtems-lwip/-/merge_requests/40#note_149324

 > +#define LWIP_IPV4 1
 > +
 > +#define GRETH 1
 > +
 > +#define TCP_WND     65535
 > +#define TCP_SND_BUF 65535
 > +#define TCP_SNDLOWAT                                          \
 > +  LWIP_MIN(                                                   \
 > +    LWIP_MAX( ( ( TCP_SND_BUF ) / 2 ), ( 2 * TCP_MSS ) + 1 ), \
 > +    ( 0xFFFFU - ( 4 * TCP_MSS ) - 1 )                         \
 > +  )
 > +#define LWIP_TCP_SACK_OUT 1
 > +#define TCP_QUEUE_OOSEQ   1
 > +
 > +#define IP_FORWARD 1
 > +#define IP_FRAG    1

This is already set by default. Detect and enforce if need be.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/pkg/rtems-lwip/-/merge_requests/40#note_149324
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