added DNSErrNo

config/sample-config.yaml

@@ -441,6 +441,14 @@ frontend:
       filter: dns_flag_response_code
       default: true
       width: 5
+    - id: DNSErrNo
+      group: DNS
+      name: DNS Error
+      tooltip: DNS error number returned by bpf_skb_load_bytes function.
+      field: DnsErrno
+      filter: dns_errno
+      default: false
+      width: 5
   filters:
     - id: src_namespace
       name: Namespace
@@ -760,6 +768,10 @@ frontend:
                 - A IANA RCODE number like 0, 3, 9
                 - A IANA RCODE name like NoError, NXDomain, NotAuth
       docUrl: https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#dns-parameters-6
+    - id: dns_errno
+      name: DNS Error
+      component: autocomplete
+      hint: Specify a single DNS error number.
     - id: time_flow_rtt
       name: Flow RTT
       component: number

web/src/components/netflow-traffic.tsx

@@ -298,7 +298,8 @@ export const NetflowTraffic: React.FC<{
         col =>
           (!isSidePanel || !col.isCommon) &&
           (isConnectionTracking() || ![ColumnsId.recordtype, ColumnsId.hashid].includes(col.id)) &&
-          (isDNSTracking() || ![ColumnsId.dnsid, ColumnsId.dnslatency, ColumnsId.dnsresponsecode].includes(col.id)) &&
+          (isDNSTracking() ||
+            ![ColumnsId.dnsid, ColumnsId.dnslatency, ColumnsId.dnsresponsecode, ColumnsId.dnserrno].includes(col.id)) &&
           (isFlowRTT() || ![ColumnsId.rttTime].includes(col.id))
       );
     },

web/src/model/filters.ts

@@ -33,6 +33,7 @@ export type FilterId =
   | 'dns_id'
   | 'dns_latency'
   | 'dns_flag_response_code'
+  | 'dns_errno'
   | 'time_flow_rtt';
 
 export interface FilterConfigDef {

web/src/utils/columns.ts

@@ -52,6 +52,7 @@ export enum ColumnsId {
   dnsid = 'DNSId',
   dnslatency = 'DNSLatency',
   dnsresponsecode = 'DNSResponseCode',
+  dnserrno = 'DNSErrNo',
   hostaddr = 'K8S_HostIP',
   srchostaddr = 'SrcK8S_HostIP',
   dsthostaddr = 'DstK8S_HostIP',

web/src/utils/dns.ts

@@ -35,3 +35,51 @@ export type DNS_CODE_NAMES = typeof dnsRcodesNames[number];
 export const getDNSRcodeDescription = (name: DNS_CODE_NAMES): string => {
   return DNS_RCODES.find(v => v.name === name)?.description || 'Unassigned';
 };
+
+// https://elixir.bootlin.com/linux/v4.7/source/include/uapi/asm-generic/errno-base.h
+export const DNS_ERRORS: ReadOnlyValues = [
+  { value: 1, name: 'EPERM', description: 'Operation not permitted' },
+  { value: 2, name: 'ENOENT', description: 'No such file or directory' },
+  { value: 3, name: 'ESRCH', description: 'No such process' },
+  { value: 4, name: 'EINTR', description: 'Interrupted system call' },
+  { value: 5, name: 'EIO', description: 'I/O error' },
+  { value: 6, name: 'ENXIO', description: 'No such device or address' },
+  { value: 7, name: 'E2BIG', description: 'Argument list too long' },
+  { value: 8, name: 'ENOEXEC', description: 'Exec format error' },
+  { value: 9, name: 'EBADF', description: 'Bad file number' },
+  { value: 10, name: 'ECHILD', description: 'No child processes' },
+  { value: 11, name: 'EAGAIN', description: 'Try again' },
+  { value: 12, name: 'ENOMEM', description: 'Out of memory' },
+  { value: 13, name: 'EACCES', description: 'Permission denied' },
+  { value: 14, name: 'EFAULT', description: 'Bad address' },
+  { value: 15, name: 'ENOTBLK', description: 'Block device required' },
+  { value: 16, name: 'EBUSY', description: 'Device or resource busy' },
+  { value: 17, name: 'EEXIST', description: 'File exists' },
+  { value: 18, name: 'EXDEV', description: 'Cross-device link' },
+  { value: 19, name: 'ENODEV', description: 'No such device' },
+  { value: 20, name: 'ENOTDIR', description: 'Not a directory' },
+  { value: 21, name: 'EISDIR', description: 'Is a directory' },
+  { value: 22, name: 'EINVAL', description: 'Invalid argument' },
+  { value: 23, name: 'ENFILE', description: 'File table overflow' },
+  { value: 24, name: 'EMFILE', description: 'Too many open files' },
+  { value: 25, name: 'ENOTTY', description: 'Not a typewriter' },
+  { value: 26, name: 'ETXBSY', description: 'Text file busy' },
+  { value: 27, name: 'EFBIG', description: 'File too large' },
+  { value: 28, name: 'ENOSPC', description: 'No space left on device' },
+  { value: 29, name: 'ESPIPE', description: 'Illegal seek' },
+  { value: 30, name: 'EROFS', description: 'Read-only file system' },
+  { value: 31, name: 'EMLINK', description: 'Too many links' },
+  { value: 32, name: 'EPIPE', description: 'Broken pipe' },
+  { value: 33, name: 'EDOM', description: 'Math argument out of domain of func' },
+  { value: 34, name: 'ERANGE', description: 'Math result not representable' }
+] as const;
+
+const dnsErrorsValues = DNS_ERRORS.map(v => v.value);
+export type DNS_ERRORS_VALUES = typeof dnsErrorsValues[number];
+
+const dnsErrorsNames = DNS_ERRORS.map(v => v.name);
+export type DNS_ERRORS_NAMES = typeof dnsErrorsNames[number];
+
+export const getDNSErrorDescription = (value: DNS_ERRORS_VALUES): string => {
+  return DNS_ERRORS.find(v => v.value === value)?.description || '';
+};

web/src/utils/filter-definitions.ts

@@ -28,7 +28,8 @@ import {
   getDropStateOptions,
   getDropCauseOptions,
   getDirectionOptionsAsync,
-  findDirectionOption
+  findDirectionOption,
+  getDnsErrorCodeOptions
 } from './filter-options';
 import { ColumnConfigDef } from './columns';
 
@@ -287,6 +288,8 @@ export const getFilterDefinitions = (
       getOptions = cap10(getDropCauseOptions);
     } else if (d.id.includes('dns_flag_response_code')) {
       getOptions = cap10(getDnsResponseCodeOptions);
+    } else if (d.id.includes('dns_errno')) {
+      getOptions = cap10(getDnsErrorCodeOptions);
     }
     return { getOptions, validate, encoder, checkCompletion };
   };

web/src/utils/filter-options.ts

@@ -5,7 +5,7 @@ import { FlowDirection } from '../api/ipfix';
 import { FilterOption } from '../model/filters';
 import { splitResource, SplitStage } from '../model/resource';
 import { autoCompleteCache } from './autocomplete-cache';
-import { DNS_RCODES } from './dns';
+import { DNS_ERRORS, DNS_RCODES } from './dns';
 import { getPort, getService } from './port';
 import { DROP_CAUSES, DROP_STATES } from './pkt-drop';
 import { TFunction } from 'i18next';
@@ -125,6 +125,14 @@ export const getDnsResponseCodeOptions = (value: string): Promise<FilterOption[]
   );
 };
 
+export const getDnsErrorCodeOptions = (value: string): Promise<FilterOption[]> => {
+  return Promise.resolve(
+    DNS_ERRORS.filter(
+      opt => String(opt.value).includes(value) || opt.name.toLowerCase().includes(value.toLowerCase())
+    ).map(v => ({ name: v.name, value: String(v.value) }))
+  );
+};
+
 export const findProtocolOption = (nameOrVal: string) => {
   return protocolOptions.find(p => p.name.toLowerCase() === nameOrVal.toLowerCase() || p.value === nameOrVal);
 };