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iptables_test.go
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iptables_test.go
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// +build linux
package iptables
import (
"errors"
"reflect"
"testing"
"github.com/influxdata/telegraf/testutil"
)
func TestIptables_Gather(t *testing.T) {
tests := []struct {
table string
chains []string
values []string
tags []map[string]string
fields [][]map[string]interface{}
err error
}{
{ // 1 - no configured table => no results
values: []string{
`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
`},
},
{ // 2 - no configured chains => no results
table: "filter",
values: []string{
`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
`},
},
{ // 3 - pkts and bytes are gathered as integers
table: "filter",
chains: []string{"INPUT"},
values: []string{
`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* foobar */
`},
tags: []map[string]string{map[string]string{"table": "filter", "chain": "INPUT", "ruleid": "foobar"}},
fields: [][]map[string]interface{}{
{map[string]interface{}{"pkts": uint64(57), "bytes": uint64(4520)}},
},
},
{ // 4 - missing fields header => no results
table: "filter",
chains: []string{"INPUT"},
values: []string{`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)`},
},
{ // 5 - invalid chain header => error
table: "filter",
chains: []string{"INPUT"},
values: []string{
`INPUT (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
`},
err: errParse,
},
{ // 6 - invalid fields header => error
table: "filter",
chains: []string{"INPUT"},
values: []string{
`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
`},
err: errParse,
},
{ // 7 - invalid integer value => best effort, no error
table: "filter",
chains: []string{"INPUT"},
values: []string{
`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
K 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
`},
},
{ // 8 - Multiple rows, multipe chains => no error
table: "filter",
chains: []string{"INPUT", "FORWARD"},
values: []string{
`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
100 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
200 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* foo */
`,
`Chain FORWARD (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
300 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* bar */
400 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
500 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* foobar */
`,
},
tags: []map[string]string{
map[string]string{"table": "filter", "chain": "INPUT", "ruleid": "foo"},
map[string]string{"table": "filter", "chain": "FORWARD", "ruleid": "bar"},
map[string]string{"table": "filter", "chain": "FORWARD", "ruleid": "foobar"},
},
fields: [][]map[string]interface{}{
{map[string]interface{}{"pkts": uint64(200), "bytes": uint64(4520)}},
{map[string]interface{}{"pkts": uint64(300), "bytes": uint64(4520)}},
{map[string]interface{}{"pkts": uint64(500), "bytes": uint64(4520)}},
},
},
{ // 9 - comments are used as ruleid if any
table: "filter",
chains: []string{"INPUT"},
values: []string{
`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 /* foobar */
100 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
`},
tags: []map[string]string{
map[string]string{"table": "filter", "chain": "INPUT", "ruleid": "foobar"},
},
fields: [][]map[string]interface{}{
{map[string]interface{}{"pkts": uint64(57), "bytes": uint64(4520)}},
},
},
{ // 10 - allow trailing text
table: "mangle",
chains: []string{"SHAPER"},
values: []string{
`Chain SHAPER (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
0 0 ACCEPT all -- * * 1.3.5.7 0.0.0.0/0 /* test */
0 0 CLASSIFY all -- * * 1.3.5.7 0.0.0.0/0 /* test2 */ CLASSIFY set 1:4
`},
tags: []map[string]string{
map[string]string{"table": "mangle", "chain": "SHAPER", "ruleid": "test"},
map[string]string{"table": "mangle", "chain": "SHAPER", "ruleid": "test2"},
},
fields: [][]map[string]interface{}{
{map[string]interface{}{"pkts": uint64(0), "bytes": uint64(0)}},
{map[string]interface{}{"pkts": uint64(0), "bytes": uint64(0)}},
},
},
{ // 11 - invalid pkts/bytes
table: "mangle",
chains: []string{"SHAPER"},
values: []string{
`Chain SHAPER (policy ACCEPT 58 packets, 5096 bytes)
pkts bytes target prot opt in out source destination
a a ACCEPT all -- * * 1.3.5.7 0.0.0.0/0 /* test */
a a CLASSIFY all -- * * 1.3.5.7 0.0.0.0/0 /* test2 */ CLASSIFY set 1:4
`},
tags: []map[string]string{},
fields: [][]map[string]interface{}{},
},
}
for i, tt := range tests {
i++
ipt := &Iptables{
Table: tt.table,
Chains: tt.chains,
lister: func(table, chain string) (string, error) {
if len(tt.values) > 0 {
v := tt.values[0]
tt.values = tt.values[1:]
return v, nil
}
return "", nil
},
}
acc := new(testutil.Accumulator)
err := acc.GatherError(ipt.Gather)
if !reflect.DeepEqual(tt.err, err) {
t.Errorf("%d: expected error '%#v' got '%#v'", i, tt.err, err)
}
if tt.table == "" {
n := acc.NFields()
if n != 0 {
t.Errorf("%d: expected 0 fields if empty table got %d", i, n)
}
continue
}
if len(tt.chains) == 0 {
n := acc.NFields()
if n != 0 {
t.Errorf("%d: expected 0 fields if empty chains got %d", i, n)
}
continue
}
if len(tt.tags) == 0 {
n := acc.NFields()
if n != 0 {
t.Errorf("%d: expected 0 values got %d", i, n)
}
continue
}
n := 0
for j, tags := range tt.tags {
for k, fields := range tt.fields[j] {
if len(acc.Metrics) < n+1 {
t.Errorf("%d: expected at least %d values got %d", i, n+1, len(acc.Metrics))
break
}
m := acc.Metrics[n]
if !reflect.DeepEqual(m.Measurement, measurement) {
t.Errorf("%d %d %d: expected measurement '%#v' got '%#v'\n", i, j, k, measurement, m.Measurement)
}
if !reflect.DeepEqual(m.Tags, tags) {
t.Errorf("%d %d %d: expected tags\n%#v got\n%#v\n", i, j, k, tags, m.Tags)
}
if !reflect.DeepEqual(m.Fields, fields) {
t.Errorf("%d %d %d: expected fields\n%#v got\n%#v\n", i, j, k, fields, m.Fields)
}
n++
}
}
}
}
func TestIptables_Gather_listerError(t *testing.T) {
errFoo := errors.New("error foobar")
ipt := &Iptables{
Table: "nat",
Chains: []string{"foo", "bar"},
lister: func(table, chain string) (string, error) {
return "", errFoo
},
}
acc := new(testutil.Accumulator)
err := acc.GatherError(ipt.Gather)
if !reflect.DeepEqual(err, errFoo) {
t.Errorf("Expected error %#v got\n%#v\n", errFoo, err)
}
}