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ip4: Add IP_MIN_FRAG_LENGTH definition

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Also uses it in the IPH_OFFSET_BYTES definition.
See patch #10270

Signed-off-by: Samuel Martin <samuel.martin@netatmo.com>
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This commit is contained in:
Samuel Martin
2022-06-30 16:34:03 +02:00
committed by Simon Goldschmidt
parent aab56d21f0
commit afb07bb12f
1 changed files with 4 additions and 1 deletions
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5
src/include/lwip/prot/ip4.h
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@@ -65,6 +65,9 @@ typedef struct ip4_addr_packed ip4_addr_p_t;
/* Maximum size of the IPv4 header with options. */
#define IP_HLEN_MAX 60
/* Minimal fragment size in bytes (c.f. RFC 791) */
#define IP_MIN_FRAG_LENGTH 8U
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
@@ -108,7 +111,7 @@ PACK_STRUCT_END
#define IPH_LEN(hdr) ((hdr)->_len)
#define IPH_ID(hdr) ((hdr)->_id)
#define IPH_OFFSET(hdr) ((hdr)->_offset)
#define IPH_OFFSET_BYTES(hdr) ((u16_t)((lwip_ntohs(IPH_OFFSET(hdr)) & IP_OFFMASK) * 8U))
#define IPH_OFFSET_BYTES(hdr) ((u16_t)((lwip_ntohs(IPH_OFFSET(hdr)) & IP_OFFMASK) * IP_MIN_FRAG_LENGTH))
#define IPH_TTL(hdr) ((hdr)->_ttl)
#define IPH_PROTO(hdr) ((hdr)->_proto)
#define IPH_CHKSUM(hdr) ((hdr)->_chksum)