Cannot allocate memory

[ibaques]

A lot of times i get this message and sngrep don't start

Couldn't activate capture: can't create rx ring on packet socket: Cannot allocate memory

I've tried different pcap buffer size but doesn't works.

The server has free memory.

[Kaian]

Hi @ibaques

That error is raised by libpcap so you will likely have the same problem with other capturing tools using the same library.

I haven't experienced this problem myself and a quick search hasn't provided any useful info, so I'm not sure how this can be fixed (or if the application has something it can configure to make libpcap work).

Regards

[Kaian]

Is this error still happening? Does it also happen with other libpcap based tools like tcpdump, ngrep, etc?

[ibaques]

Yes, the error only appears with sngrep.

El vie, 24 feb 2023 11:25, Kaian @.***> escribió:

Is this error still happening? Does it also happen with other libpcap based tools like tcpdump, ngrep, etc?

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[Kaian]

Can you provide the sngrep version, command line used and the output of sngrep -D ? What OS and enviroment are running sngrep?

Thanks!

[ibaques]

sngrep - 1.4.8 sngrep -c CentOS 6

ActionID: 1 ActionName: up Key: 259 () ActionID: 1 ActionName: up Key: 107 (k) ActionID: 2 ActionName: down Key: 258 () ActionID: 2 ActionName: down Key: 106 (j) ActionID: 3 ActionName: left Key: 260 () ActionID: 3 ActionName: left Key: 104 (h) ActionID: 4 ActionName: right Key: 261 () ActionID: 4 ActionName: right Key: 108 (l) ActionID: 5 ActionName: delete Key: 330 () ActionID: 6 ActionName: backspace Key: 263 () ActionID: 6 ActionName: backspace Key: 8 () ActionID: 6 ActionName: backspace Key: 127 () ActionID: 7 ActionName: npage Key: 338 () ActionID: 7 ActionName: npage Key: 6 () ActionID: 8 ActionName: ppage Key: 339 () ActionID: 8 ActionName: ppage Key: 2 () ActionID: 9 ActionName: hnpage Key: 4 () ActionID: 10 ActionName: hppage Key: 21 () ActionID: 10 ActionName: hppage Key: 0 () ActionID: 11 ActionName: begin Key: 262 () ActionID: 11 ActionName: begin Key: 1 () ActionID: 12 ActionName: end Key: 360 () ActionID: 12 ActionName: end Key: 5 () ActionID: 13 ActionName: pfield Key: 259 () ActionID: 14 ActionName: nfield Key: 258 () ActionID: 14 ActionName: nfield Key: 9 () ActionID: 15 ActionName: Key: 410 () ActionID: 16 ActionName: clear Key: 21 () ActionID: 16 ActionName: clear Key: 23 () ActionID: 17 ActionName: clearcalls Key: 269 (F5) ActionID: 17 ActionName: clearcalls Key: 12 () ActionID: 18 ActionName: clearcallssoft Key: 273 (F9) ActionID: 18 ActionName: clearcallssoft Key: 0 () ActionID: 19 ActionName: togglesyntax Key: 272 (F8) ActionID: 19 ActionName: togglesyntax Key: 67 (C) ActionID: 20 ActionName: colormode Key: 99 (c) ActionID: 21 ActionName: compress Key: 115 (s) ActionID: 23 ActionName: togglealias Key: 97 (a) ActionID: 24 ActionName: pause Key: 112 (p) ActionID: 25 ActionName: prevscreen Key: 27 (Esc) ActionID: 25 ActionName: prevscreen Key: 113 (q) ActionID: 25 ActionName: prevscreen Key: 81 (Q) ActionID: 26 ActionName: help Key: 265 (F1) ActionID: 26 ActionName: help Key: 104 (h) ActionID: 26 ActionName: help Key: 72 (H) ActionID: 26 ActionName: help Key: 63 (?) ActionID: 27 ActionName: raw Key: 270 (F6) ActionID: 27 ActionName: raw Key: 82 (R) ActionID: 27 ActionName: raw Key: 114 (r) ActionID: 28 ActionName: flow Key: 10 (Enter) ActionID: 29 ActionName: flowex Key: 268 (F4) ActionID: 29 ActionName: flowex Key: 120 (x) ActionID: 30 ActionName: filters Key: 271 (F7) ActionID: 30 ActionName: filters Key: 102 (f) ActionID: 30 ActionName: filters Key: 70 (F) ActionID: 31 ActionName: columns Key: 274 (F10) ActionID: 31 ActionName: columns Key: 116 (t) ActionID: 31 ActionName: columns Key: 84 (T) ActionID: 32 ActionName: settings Key: 272 (F8) ActionID: 32 ActionName: settings Key: 111 (o) ActionID: 32 ActionName: settings Key: 79 (O) ActionID: 33 ActionName: stats Key: 105 (i) ActionID: 34 ActionName: columnup Key: 45 (-) ActionID: 35 ActionName: columndown Key: 43 (+) ActionID: 36 ActionName: sdpinfo Key: 266 (F2) ActionID: 36 ActionName: sdpinfo Key: 100 (d) ActionID: 37 ActionName: search Key: 267 (F3) ActionID: 37 ActionName: search Key: 47 (/) ActionID: 37 ActionName: search Key: 9 () ActionID: 38 ActionName: save Key: 266 (F2) ActionID: 38 ActionName: save Key: 115 (s) ActionID: 38 ActionName: save Key: 83 (S) ActionID: 39 ActionName: select Key: 32 (Space) ActionID: 40 ActionName: confirm Key: 10 (Enter) ActionID: 41 ActionName: togglemedia Key: 267 (F3) ActionID: 41 ActionName: togglemedia Key: 109 (m) ActionID: 42 ActionName: onlymedia Key: 77 (M) ActionID: 43 ActionName: rawpreview Key: 116 (t) ActionID: 44 ActionName: morerawpreview Key: 57 (9) ActionID: 45 ActionName: lessrawpreview Key: 48 (0) ActionID: 46 ActionName: resetrawpreview Key: 84 (T) ActionID: 47 ActionName: onlysdp Key: 68 (D) ActionID: 49 ActionName: autoscroll Key: 65 (A) ActionID: 48 ActionName: hintalt Key: 75 (K) ActionID: 50 ActionName: sortprev Key: 60 (<) ActionID: 51 ActionName: sortnext Key: 62 (>) ActionID: 52 ActionName: sortswap Key: 122 (z) ActionID: 53 ActionName: toggletime Key: 119 (w) SettingId: 1 SettingName: colormode Value: request SettingId: 2 SettingName: syntax Value: off SettingId: 3 SettingName: syntax.tag Value: off SettingId: 4 SettingName: syntax.branch Value: off SettingId: 5 SettingName: hintkeyalt Value: off SettingId: 6 SettingName: exitprompt Value: on SettingId: 7 SettingName: capture.limit Value: 20000 SettingId: 8 SettingName: capture.device Value: any SettingId: 9 SettingName: capture.outfile Value: (null) SettingId: 10 SettingName: capture.buffer Value: 2 SettingId: 11 SettingName: capture.rtp Value: off SettingId: 12 SettingName: capture.storage Value: memory SettingId: 13 SettingName: capture.rotate Value: off SettingId: 14 SettingName: sip.noincomplete Value: on SettingId: 15 SettingName: sip.xcid Value: X-Call-ID|X-CID SettingId: 16 SettingName: sip.calls Value: off SettingId: 17 SettingName: savepath Value: /home/ SettingId: 18 SettingName: displayalias Value: off SettingId: 19 SettingName: aliasport Value: off SettingId: 20 SettingName: cl.scrollstep Value: 4 SettingId: 21 SettingName: cl.colorattr Value: on SettingId: 22 SettingName: cl.autoscroll Value: off SettingId: 23 SettingName: cl.sortfield Value: index SettingId: 24 SettingName: cl.sortorder Value: asc SettingId: 25 SettingName: cf.forceraw Value: on SettingId: 26 SettingName: cf.rawminwidth Value: 40 SettingId: 27 SettingName: cf.rawfixedwidth Value: (null) SettingId: 28 SettingName: cf.splitcallid Value: off SettingId: 29 SettingName: cf.highlight Value: bold SettingId: 30 SettingName: cf.scrollstep Value: 4 SettingId: 31 SettingName: cf.localhighlight Value: on SettingId: 32 SettingName: cf.sdpinfo Value: off SettingId: 33 SettingName: cf.media Value: off SettingId: 34 SettingName: cf.onlymedia Value: off SettingId: 35 SettingName: cf.deltatime Value: on SettingId: 36 SettingName: cr.scrollstep Value: 10 SettingId: 37 SettingName: cr.nonascii Value: . SettingId: 38 SettingName: filter.payload Value: (null) SettingId: 39 SettingName: filter.methods Value: REGISTER,INVITE,SUBSCRIBE,NOTIFY,OPTIONS,PUBLISH,MESSAGE,INFO,REFER,UPDATE,KDMQ SettingId: 40 SettingName: eep.send Value: off SettingId: 41 SettingName: eep.send.version Value: 3 SettingId: 42 SettingName: eep.send.address Value: 127.0.0.1 SettingId: 43 SettingName: eep.send.port Value: 9060 SettingId: 44 SettingName: eep.send.pass Value: (null) SettingId: 45 SettingName: eep.send.id Value: 2002 SettingId: 46 SettingName: eep.listen Value: off SettingId: 47 SettingName: eep.listen.version Value: 3 SettingId: 48 SettingName: eep.listen.address Value: 0.0.0.0 SettingId: 49 SettingName: eep.listen.port Value: 9060 SettingId: 50 SettingName: eep.listen.pass Value: (null) SettingId: 51 SettingName: eep.listen.uuid Value: off

El vie, 24 feb 2023 a las 12:04, Kaian @.***>) escribió:

Can you provide the sngrep version, command line used and the output of sngrep -D ? What OS and enviroment are running sngrep?

Thanks!

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[Kaian]

Does this problem happen in other Centos 6 enviroments?

Have you tested with latest sngrep in a newer Centos version (CentOS 8 or 9)?

Regards