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devip: add comment to ip.h explaining Routehint struct

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This commit is contained in:
cinap_lenrek 2021-10-11 12:16:21 +00:00
parent 5484260b42
commit ad1ab7089d
1 changed files with 6 additions and 0 deletions
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6
sys/src/9/ip/ip.h
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@ -164,6 +164,12 @@ struct Ip4hdr
uchar dst[4]; /* IP destination */ uchar dst[4]; /* IP destination */
}; };
/*
* cache for route and arp table lookups.
* one per Conv so conversations with a
* fixed target can avoid the per packet
* lookup overhead.
*/
struct Routehint struct Routehint
{ {
Route *r; /* last route used */ Route *r; /* last route used */