254 lines
9.1 KiB
Go
254 lines
9.1 KiB
Go
// +build linux
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package iptables
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import (
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"errors"
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"reflect"
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"testing"
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"github.com/influxdata/telegraf/testutil"
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)
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func TestIptables_Gather(t *testing.T) {
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tests := []struct {
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table string
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chains []string
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values []string
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tags []map[string]string
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fields [][]map[string]interface{}
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err error
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}{
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{ // 1 - no configured table => no results
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values: []string{
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`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
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`},
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},
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{ // 2 - no configured chains => no results
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table: "filter",
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values: []string{
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`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
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`},
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},
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{ // 3 - pkts and bytes are gathered as integers
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table: "filter",
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chains: []string{"INPUT"},
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values: []string{
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`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* foobar */
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`},
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tags: []map[string]string{{"table": "filter", "chain": "INPUT", "target": "RETURN", "ruleid": "foobar"}},
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fields: [][]map[string]interface{}{
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{map[string]interface{}{"pkts": uint64(57), "bytes": uint64(4520)}},
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},
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},
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{ // 4 - missing fields header => no results
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table: "filter",
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chains: []string{"INPUT"},
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values: []string{`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)`},
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},
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{ // 5 - invalid chain header => error
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table: "filter",
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chains: []string{"INPUT"},
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values: []string{
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`INPUT (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
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`},
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err: errParse,
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},
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{ // 6 - invalid fields header => error
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table: "filter",
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chains: []string{"INPUT"},
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values: []string{
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`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
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57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
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`},
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err: errParse,
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},
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{ // 7 - invalid integer value => best effort, no error
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table: "filter",
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chains: []string{"INPUT"},
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values: []string{
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`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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K 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
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`},
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},
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{ // 8 - Multiple rows, multiple chains => no error
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table: "filter",
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chains: []string{"INPUT", "FORWARD"},
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values: []string{
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`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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100 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
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200 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* foo */
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`,
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`Chain FORWARD (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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300 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* bar */
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400 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
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500 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 /* foobar */
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`,
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},
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tags: []map[string]string{
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{"table": "filter", "chain": "INPUT", "target": "RETURN", "ruleid": "foo"},
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{"table": "filter", "chain": "FORWARD", "target": "RETURN", "ruleid": "bar"},
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{"table": "filter", "chain": "FORWARD", "target": "RETURN", "ruleid": "foobar"},
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},
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fields: [][]map[string]interface{}{
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{map[string]interface{}{"pkts": uint64(200), "bytes": uint64(4520)}},
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{map[string]interface{}{"pkts": uint64(300), "bytes": uint64(4520)}},
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{map[string]interface{}{"pkts": uint64(500), "bytes": uint64(4520)}},
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},
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},
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{ // 9 - comments are used as ruleid if any
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table: "filter",
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chains: []string{"INPUT"},
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values: []string{
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`Chain INPUT (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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57 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 /* foobar */
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100 4520 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
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`},
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tags: []map[string]string{
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{"table": "filter", "chain": "INPUT", "target": "RETURN", "ruleid": "foobar"},
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},
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fields: [][]map[string]interface{}{
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{map[string]interface{}{"pkts": uint64(57), "bytes": uint64(4520)}},
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},
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},
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{ // 10 - allow trailing text
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table: "mangle",
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chains: []string{"SHAPER"},
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values: []string{
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`Chain SHAPER (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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0 0 ACCEPT all -- * * 1.3.5.7 0.0.0.0/0 /* test */
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0 0 CLASSIFY all -- * * 1.3.5.7 0.0.0.0/0 /* test2 */ CLASSIFY set 1:4
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`},
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tags: []map[string]string{
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{"table": "mangle", "chain": "SHAPER", "target": "ACCEPT", "ruleid": "test"},
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{"table": "mangle", "chain": "SHAPER", "target": "CLASSIFY", "ruleid": "test2"},
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},
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fields: [][]map[string]interface{}{
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{map[string]interface{}{"pkts": uint64(0), "bytes": uint64(0)}},
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{map[string]interface{}{"pkts": uint64(0), "bytes": uint64(0)}},
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},
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},
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{ // 11 - invalid pkts/bytes
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table: "mangle",
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chains: []string{"SHAPER"},
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values: []string{
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`Chain SHAPER (policy ACCEPT 58 packets, 5096 bytes)
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pkts bytes target prot opt in out source destination
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a a ACCEPT all -- * * 1.3.5.7 0.0.0.0/0 /* test */
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a a CLASSIFY all -- * * 1.3.5.7 0.0.0.0/0 /* test2 */ CLASSIFY set 1:4
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`},
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tags: []map[string]string{},
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fields: [][]map[string]interface{}{},
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},
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{ // 11 - all target and ports
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table: "all_recv",
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chains: []string{"accountfwd"},
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values: []string{
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`Chain accountfwd (1 references)
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pkts bytes target prot opt in out source destination
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123 456 all -- eth0 * 0.0.0.0/0 0.0.0.0/0 /* all_recv */
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`},
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tags: []map[string]string{
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{"table": "all_recv", "chain": "accountfwd", "target": "all", "ruleid": "all_recv"},
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},
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fields: [][]map[string]interface{}{
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{map[string]interface{}{"pkts": uint64(123), "bytes": uint64(456)}},
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},
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},
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}
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for i, tt := range tests {
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t.Run(tt.table, func(t *testing.T) {
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i++
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ipt := &Iptables{
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Table: tt.table,
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Chains: tt.chains,
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lister: func(table, chain string) (string, error) {
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if len(tt.values) > 0 {
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v := tt.values[0]
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tt.values = tt.values[1:]
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return v, nil
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}
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return "", nil
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},
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}
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acc := new(testutil.Accumulator)
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err := acc.GatherError(ipt.Gather)
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if !reflect.DeepEqual(tt.err, err) {
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t.Errorf("%d: expected error '%#v' got '%#v'", i, tt.err, err)
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}
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if tt.table == "" {
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n := acc.NFields()
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if n != 0 {
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t.Errorf("%d: expected 0 fields if empty table got %d", i, n)
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}
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return
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}
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if len(tt.chains) == 0 {
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n := acc.NFields()
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if n != 0 {
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t.Errorf("%d: expected 0 fields if empty chains got %d", i, n)
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}
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return
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}
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if len(tt.tags) == 0 {
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n := acc.NFields()
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if n != 0 {
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t.Errorf("%d: expected 0 values got %d", i, n)
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}
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return
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}
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n := 0
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for j, tags := range tt.tags {
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for k, fields := range tt.fields[j] {
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if len(acc.Metrics) < n+1 {
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t.Errorf("%d: expected at least %d values got %d", i, n+1, len(acc.Metrics))
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break
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}
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m := acc.Metrics[n]
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if !reflect.DeepEqual(m.Measurement, measurement) {
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t.Errorf("%d %d %d: expected measurement '%#v' got '%#v'\n", i, j, k, measurement, m.Measurement)
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}
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if !reflect.DeepEqual(m.Tags, tags) {
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t.Errorf("%d %d %d: expected tags\n%#v got\n%#v\n", i, j, k, tags, m.Tags)
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}
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if !reflect.DeepEqual(m.Fields, fields) {
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t.Errorf("%d %d %d: expected fields\n%#v got\n%#v\n", i, j, k, fields, m.Fields)
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}
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n++
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}
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}
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})
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}
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}
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func TestIptables_Gather_listerError(t *testing.T) {
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errFoo := errors.New("error foobar")
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ipt := &Iptables{
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Table: "nat",
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Chains: []string{"foo", "bar"},
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lister: func(table, chain string) (string, error) {
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return "", errFoo
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},
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}
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acc := new(testutil.Accumulator)
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err := acc.GatherError(ipt.Gather)
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if !reflect.DeepEqual(err, errFoo) {
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t.Errorf("Expected error %#v got\n%#v\n", errFoo, err)
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}
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}
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