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research: disable cksum validation #16

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AkihiroSuda opened this issue Aug 1, 2018 · 3 comments
Open

research: disable cksum validation #16

AkihiroSuda opened this issue Aug 1, 2018 · 3 comments
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enhancement New feature or request help wanted Extra attention is needed libslirp

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@AkihiroSuda
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I think we can ignore cksum for our usecase but not 100% sure
@AkihiroSuda AkihiroSuda added enhancement New feature or request help wanted Extra attention is needed labels Aug 1, 2018
@AkihiroSuda AkihiroSuda mentioned this issue Aug 2, 2018
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@AkihiroSuda
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TODO: investigate what is TUN_F_CSUM

/* Features for GSO (TUNSETOFFLOAD). */
#define TUN_F_CSUM	0x01	/* You can hand me unchecksummed packets. */
#define TUN_F_TSO4	0x02	/* I can handle TSO for IPv4 packets */
#define TUN_F_TSO6	0x04	/* I can handle TSO for IPv6 packets */
#define TUN_F_TSO_ECN	0x08	/* I can handle TSO with ECN bits. */
#define TUN_F_UFO	0x10	/* I can handle UFO packets */

https://github.com/torvalds/linux/blob/6b4703768268d09ac928c64474fd686adf4574f9/include/uapi/linux/if_tun.h#L83-L88

@AkihiroSuda
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https://elixir.bootlin.com/linux/v4.18-rc8/source/include/uapi/linux/if_tun.h#L32

TODO: investigate what is TUNSETNOCSUM

@AkihiroSuda
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somebody's note https://ldpreload.com/p/tuntap-notes.txt

@AkihiroSuda AkihiroSuda mentioned this issue Mar 9, 2019
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@AkihiroSuda AkihiroSuda mentioned this issue Mar 29, 2019
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