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authorbaude <bbaude@redhat.com>2018-03-02 15:09:18 -0600
committerAtomic Bot <atomic-devel@projectatomic.io>2018-03-03 19:45:24 +0000
commit4f4a78abb40fa0e8407e8a55d5a67a2650d8fd96 (patch)
treeaa3e6b64dd4dfa46e0e8a9ded5194816508010c9 /libpod/networking.go
parentc187538b9e7fa9af75a4123ff3dc128ce6f4ba1b (diff)
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networking.go tweak iptables functions
Took duplicated code and merged it into the helper function so only a single exec was executed. Signed-off-by: baude <bbaude@redhat.com> Closes: #446 Approved by: mheon
Diffstat (limited to 'libpod/networking.go')
-rw-r--r--libpod/networking.go28
1 files changed, 12 insertions, 16 deletions
diff --git a/libpod/networking.go b/libpod/networking.go
index 5118b972a..cceeb18d6 100644
--- a/libpod/networking.go
+++ b/libpod/networking.go
@@ -68,21 +68,22 @@ func (r *Runtime) createNetNS(ctr *Container) (err error) {
// https://github.com/containernetworking/plugins/pull/75
if resultStruct.IPs != nil {
for _, ip := range resultStruct.IPs {
- iptablesCmd := iptablesDNS("-I", ip.Address.IP.String())
- logrus.Debug("Running iptables command: ", strings.Join(iptablesCmd, " "))
- _, err := utils.ExecCmd("iptables", iptablesCmd...)
- if err != nil {
- logrus.Error(err)
- }
+ iptablesDNS("-I", ip.Address.IP.String())
}
}
return nil
}
-// iptablesDNS accepts an arg (-I|-D) and IP address that generates the
-// iptables command to be run
-func iptablesDNS(arg, ip string) []string {
- return []string{"-t", "filter", arg, "FORWARD", "-s", ip, "!", "-o", ip, "-j", "ACCEPT"}
+// iptablesDNS accepts an arg (-I|-D) and IP address of the container and then
+// generates an iptables command to either add or subtract the needed rule
+func iptablesDNS(arg, ip string) error {
+ iptablesCmd := []string{"-t", "filter", arg, "FORWARD", "-s", ip, "!", "-o", ip, "-j", "ACCEPT"}
+ logrus.Debug("Running iptables command: ", strings.Join(iptablesCmd, " "))
+ _, err := utils.ExecCmd("iptables", iptablesCmd...)
+ if err != nil {
+ logrus.Error(err)
+ }
+ return err
}
// Join an existing network namespace
@@ -128,12 +129,7 @@ func (r *Runtime) teardownNetNS(ctr *Container) error {
// on cleanup. Remove when https://github.com/containernetworking/plugins/pull/75
// is merged.
for _, ip := range ctr.state.IPs {
- iptablesCmd := iptablesDNS("-D", ip.Address.IP.String())
- logrus.Debug("Running iptables command: ", strings.Join(iptablesCmd, " "))
- _, err := utils.ExecCmd("iptables", iptablesCmd...)
- if err != nil {
- logrus.Error(err)
- }
+ iptablesDNS("-D", ip.Address.IP.String())
}
logrus.Debugf("Tearing down network namespace at %s for container %s", ctr.state.NetNS.Path(), ctr.ID())