IPH_HL is only used within LwIP.
 
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IPH_HL macro

Syntax

#define IPH_HL(hdr) ((hdr)->_v_hl & 0x0f)

Arguments

hdr

References

LocationText
ip4.h:105
#define IPH_HL(hdr) ((hdr)->_v_hl & 0x0f)
ip4.h:106
#define IPH_HL_BYTES(hdr) ((u8_t)(IPH_HL(hdr) * 4))