ip: Support checksum returned in csmg
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- v1 Latest2 of 3 patches 2 repliesIn review
2 of 3 patches are in this archive. The cover letter announces 3.
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | ip: Move checksum convert defines to inetinclude/ include/ net/ +3 more | +22 | 0 replies | |
| 3/3 | ip: Add support for IP_CHECKSUM cmsginclude/ include/ net/ +1 more | +44 | 2 replies |
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Cover letter [PATCH net-next 0/3] ip: Support checksum returned in csmg
This patch set allows the packet checksum for a datagram socket to be returned in csum data in recvmsg. This allows userspace to implement its own checksum over the data, for instance if an IP tunnel was be implemented in user space, the inner checksum could be validated.
Changes in this patch set:
- Move checksum conversion to inet_sock from udp_sock. This generalizes checksum conversion for use with other protocols.
- Move IP cmsg constants to a header file and make processing of the flags more efficient in ip_cmsg_recv.
- Return checksum value in cmsg. This is specifically the unfolded 32 bit checksum of the full packet starting from the first byte returned in recvmsg.
Tested: Wrote a little server to get checksums in cmsg for UDP and
verfied correct checksum is returned.
Tom Herbert (3):
ip: Move checksum convert defines to inet
ip: IP cmsg cleanup
ip: Add support for IP_CHECKSUM cmsg
include/linux/udp.h | 16 +-------- include/net/inet_sock.h | 27 ++++++++++++++ include/uapi/linux/in.h | 1 + net/ipv4/fou.c | 2 +- net/ipv4/ip_sockglue.c | 96 +++++++++++++++++++++++++++++++++++-------------- net/ipv4/udp.c | 12 +++++-- net/ipv4/udp_tunnel.c | 2 +- net/ipv6/udp.c | 2 +- 8 files changed, 111 insertions(+), 47 deletions(-)
Signature · 1 line
2.2.0.rc0.207.ga3a616c