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mdlayher/raw supports them, so why don't we support them, too.
Signed-off-by: Chris Koch <chrisko@google.com>
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This should fix the panic we've seen with the malformed packets on the
wire. Remaining buffer size should be checked before trying to access
the data, otherwise Go might panic on out of bounds slice operation.
Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
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u-root -> dhcp -> u-root is the circular dependency. Which is fine,
except we messed up modules in u-root big time. We need to break the
circular dep for now.
Signed-off-by: Chris Koch <chrisko@google.com>
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Signed-off-by: Chris Koch <chrisko@google.com>
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Signed-off-by: Dmitrii Okunev <xaionaro@fb.com>
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Added a bind to interface functionality.
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No need to convert these types.
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When reading raw packets from the network, it can happen that the raw
ethernet packet read has undefined bytes after the end of the ip
packet (either from the network or in some cases from the local
stack).
Those bytes should not be passed to the dhcp-receiver otherwise the
option parser which is picky about final padding byte will silently
discard the dhcp-reply.
Rename ipLen, udpLen variables with more explicit names to avoid
confusion between header, payload, total length possibly considered
in this function.
Tested: ast2500 bmc reproducing the issue + existing go test for coverage.
Signed-off-by: Loic Prylli <lprylli@netflix.com>
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- Able to send UDP packets before interface is configured.
- Able to use any net.PacketConn.
- RFC2131-compliant retransmission logic.
- Tests.
- Race-condition-averse.
Previous clients (both mine and the ones here) are prone to race
condition errors.
Having one and only one place that calls receive on the socket
"continuously" without having to coordinate hand-offs makes the logic
way easier to follow, and allows for multiple requests in flux at a
time.
Signed-off-by: Christopher Koch <chrisko@google.com>
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