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Fix bugs in ip6_pack_hdr so that the traffic class and flow label are

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set correctly.

1. Shift the low-order bits of fc by 20 bits, not 28, because fl is a
   20-bit field.
2. Use a mask in host byte order to mask fl, which is also provided in
   host byte order.
3. Swap | and & in combining fc and fl.
This commit is contained in:
david
2010-10-07 21:51:28 +00:00
parent 80914c6aa8
commit 6112cb9a43
1 changed files with 2 additions and 2 deletions
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4
libdnet-stripped/include/dnet/ip6.h
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@@ -164,8 +164,8 @@ struct ip6_ext_hdr {
#define ip6_pack_hdr(hdr, fc, fl, plen, nxt, hlim, src, dst) do { \
struct ip6_hdr *ip6 = (struct ip6_hdr *)(hdr); \
ip6->ip6_flow = htonl(((uint32_t)(fc) << 28) & \
(IP6_FLOWLABEL_MASK | (fl))); \
ip6->ip6_flow = htonl(((uint32_t)(fc) << 20) | \
(0x000fffff & (fl))); \
ip6->ip6_vfc = (IP6_VERSION | ((fc) >> 4)); \
ip6->ip6_plen = htons((plen)); \
ip6->ip6_nxt = (nxt); ip6->ip6_hlim = (hlim); \