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Fix issue in --ip6 validation for docker create

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This fix tries to address the issue raised in comment:
https://github.com/docker/docker/pull/25943#discussion_r76843081
Previously, the validation for `ip6` is done by checking ParseIP().To16().
However, in case an IPv4 address or an IPv4-mapped Ipv6 address has been
provided, the validation will pass (should fail).

This fix first check if `--ip6` is passed with a valid IP address and returns
error for invalid IP addresses. It then check if an IPv4 or IPv4-mapped Ipv6
address is passed, and return error accordingly.

This fix adds two more cases in the tests. One for IPv4 address passed to `--ip6`
and another for Ipv4-mapped IPv6 address passed to `--ip6`. In both cases,
without this fix the validation will pass through.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This commit is contained in:
Yong Tang 2016-08-30 19:07:21 -07:00
parent fbcf0a50b2
commit 1e6eccae69
2 changed files with 13 additions and 2 deletions
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7
daemon/create.go
View file

@ -256,11 +256,16 @@ func (daemon *Daemon) verifyNetworkingConfig(nwConfig *networktypes.NetworkingCo
if v.IPAMConfig.IPv4Address != "" && net.ParseIP(v.IPAMConfig.IPv4Address).To4() == nil {
return errors.NewBadRequestError(fmt.Errorf("invalid IPv4 address: %s", v.IPAMConfig.IPv4Address))
}
if v.IPAMConfig.IPv6Address != "" && net.ParseIP(v.IPAMConfig.IPv6Address).To16() == nil {
if v.IPAMConfig.IPv6Address != "" {
n := net.ParseIP(v.IPAMConfig.IPv6Address)
// if the address is an invalid network address (ParseIP == nil) or if it is
// an IPv4 address (To4() != nil), then it is an invalid IPv6 address
if n == nil || n.To4() != nil {
return errors.NewBadRequestError(fmt.Errorf("invalid IPv6 address: %s", v.IPAMConfig.IPv6Address))
}
}
}
}
return nil
}
l := make([]string, 0, len(nwConfig.EndpointsConfig))

6
integration-cli/docker_cli_network_unix_test.go
View file

@ -1749,4 +1749,10 @@ func (s *DockerNetworkSuite) TestDockerNetworkValidateIP(c *check.C) {
c.Assert(err.Error(), checker.Contains, "invalid IPv4 address")
_, _, err = dockerCmdWithError("run", "--net=mynet", "--ip", "172.28.99.99", "--ip6", "mynet_ip6", "busybox", "top")
c.Assert(err.Error(), checker.Contains, "invalid IPv6 address")
// This is a case of IPv4 address to `--ip6`
_, _, err = dockerCmdWithError("run", "--net=mynet", "--ip6", "172.28.99.99", "busybox", "top")
c.Assert(err.Error(), checker.Contains, "invalid IPv6 address")
// This is a special case of an IPv4-mapped IPv6 address
_, _, err = dockerCmdWithError("run", "--net=mynet", "--ip6", "::ffff:172.28.99.99", "busybox", "top")
c.Assert(err.Error(), checker.Contains, "invalid IPv6 address")
}