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tcp: fixed TCPH_UNSET_FLAG macro
This macro is only used by VJ support in PPP and was always wrong since its introduction in commite4a6d199fe
. It's almost only used to clear the PSH TCP flag when necessary. This flag was probably less common about a decade ago so that would be the reason why it goes unnoticed for so long. Fixes:e4a6d199fe
"Merged from DEVEL into main tree." Signed-off-by: Sylvain Rochet <gradator@gradator.net>
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@ -186,7 +186,7 @@ PACK_STRUCT_END
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#define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | (flags))
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#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags))
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#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
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#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags & ~htons(flags))
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#define TCP_TCPLEN(seg) ((seg)->len + (((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0) ? 1U : 0U))
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