Hello,

regarding shared memory, Kamailio uses usually shared memory, regardless of how many workers are configured.

About compiling Kamailio without its internal memory pool, its possible. This was discussed last month in a thread about memory performance, if I remember correctly, on the list.

Cheers,

Henning

On 01.02.23 16:10, Дилян Палаузов wrote:

Hello,

does somebody has success, when using websockets and topoh?

If I run a single Kamailio process, I guess I do not need real shared memory. Can I adjust Kamailio somehow to use just malloc()/free() in this case, so that debugging is easier?

There is no case when kamailio will run as a single process, even if you set children=1, there are timer processes. The shared memory (shm) is used always, the private (pkg) memory manager can be replaced with malloc()/free().

Cheers, Daniel

As it turned out dns_cache_init=off leads to crashes - https://github.com/kamailio/kamailio/issues/3350 . With dns_cache_init=on and use_dns_cache=on, does not lead to reading invalid data.

Running Kamailio under valgrind:

When I do not set topoh.mask_key (so the default is used), for the yesterday mentioned workflow, for incoming packet:

18(19) ERROR: <core> [core/kemi.c:96]: sr_kemi_core_err(): ksr_sipdump_event 1--------- sipdump:msg src 144.76.142.78:48294 dst 144.76.142.78:5060 ACK sip:127.3.4.84;line=sr-n6iazhainwp1g6s5orj136tdouwy3etacsf73ejxgwvqp9e7zhkucrp- gbeewrfl36313.0e3j4amxpworeiw.y1wlpagevs3eabw.3lz6tdcrtlh.cwobffzgzfwx37m.jlibmlzxczibv* SIP/2.0 Route: sip:77jSK02EGC2JHwWQTI5OE8SQTI5OvKY=@144.76.142.78;transport=ws;r2=on;lr;nat=yes Route: sip:127.3.4.84;line=sr-N6IAzBNwCIWOMxeta4MLmqrwKutjm.KHa.r.jKaeWjQ6muqQPxF4WGZwWJZfWxV7WlcXpUerohWAowe4H9aBNx1LMBu5oB1dNB1739PQkRKl Via: SIP/2.0/WSS lvqj9uhih64a.invalid;branch=z9hG4bK962314 Max-Forwards: 70 To: sip:test-gnome-calls@bapha.be;tag=5Ml7bJz From: "Online https://sip.bapha.be" sip:online@bapha.be;tag=kab7lqjdgi Call-ID: i7jjtim7h775c6vqqudg CSeq: 9846 ACK Supported: outbound User-Agent: SIP.js/0.7.8 Content-Length: 0

it logs: 18(19) ERROR: kemix [kemix_mod.c:229]: ki_kx_get_ruri_attr(): failed to parse the R-URI 18(19) ERROR: rr [loose.c:1011]: loose_route_mode(): failed to parse Request URI

With topoh.mask_key "TEAI32l)- eauiDEUIA!?()" (in practice without the quotes) the same happens.

With topoh.mask_key "TEAI32l" (in practive without the quotes) for the same workflow: the above message does not appear, but KSR.tm.t_relay() produces

for this input

8(19) ERROR: <core> [core/kemi.c:96]: sr_kemi_core_err(): ksr_sipdump_event 1--------- sipdump:msg src 144.76.142.78:52284 dst 144.76.142.78:5060 ACK sip:127.3.4.84; line=sr-if7s1mg7i36pnf0abdwppfzlbqweplzssgitplwyn39zmy4t1mctsd6dno4lwdiopfppp5flpuqscx63kd47w5epwo6snl90plgow5p- 1fzlsdzo25n3koik1vhkwxptc5woeoc-159seo9* SIP/2.0 Route: sip:wCkxt90ui5/O5wWQTI5OE8SQTI5OzDw=@144.76.142.78;transport=ws;r2=on;lr;nat=yes Route: sip:127.3.4.84;line=sr-if7s1mMXS3RQ15FTS5wA5OC3CTzwV5C2g5R5wCg4WwZDgqiZ6XIQWvH3WUHkWX9tWOnyMq4RbmWsb34Q2YgoiXP-coTAboPlioPtpY6Z8dCO Via: SIP/2.0/WSS do52j57mf93b.invalid;branch=z9hG4bK1262183 Max-Forwards: 70 To: sip:test-gnome-calls@bapha.be;tag=~QBNVNr From: "Online https://sip.bapha.be" sip:online@bapha.be;tag=rfucq55gg3 Call-ID: 0up52op7q7ilpa4mrq7e CSeq: 3376 ACK Supported: outbound User-Agent: SIP.js/0.7.8 Content-Length: 0

18(19) ERROR: <core> [core/forward.c:508]: forward_request(): resolving "testnimecallubp.b" failed: unresolvable A or AAAA request [-7]

In the above string there are some invisible bytes. When I pass it over hexdump -C the output is:

00000000 31 38 28 31 39 29 20 45 52 52 4f 52 3a 20 3c 63 |18(19) ERROR: <c| 00000010 6f 72 65 3e 20 5b 63 6f 72 65 2f 66 6f 72 77 61 |ore> [core/forwa| 00000020 72 64 2e 63 3a 35 30 38 5d 3a 20 66 6f 72 77 61 |rd.c:508]: forwa| 00000030 72 64 5f 72 65 71 75 65 73 74 28 29 3a 20 72 65 |rd_request(): re| 00000040 73 6f 6c 76 69 6e 67 20 22 74 65 73 74 18 83 6e |solving "test..n| 00000050 69 6d 65 18 63 61 6c 6c 75 1f 62 c1 70 c1 17 2e |ime.callu.b.p...| 00000060 62 c5 22 20 66 61 69 6c 65 64 3a 20 75 6e 72 65 |b." failed: unre| 00000070 73 6f 6c 76 61 62 6c 65 20 41 20 6f 72 20 41 41 |solvable A or AA| 00000080 41 41 20 72 65 71 75 65 73 74 20 5b 2d 37 5d 0d |AA request [-7].| 00000090 0a |.| 00000091

As you can see the strings test-gnome-calls@bapha.be and test..nime.callu.b.p are similar: many octets are identacal. I have stopped and started Kamailio several times, the results do repeat.

These are my topoh parameters

#modparam("topoh", "mask_key", "TEAI32l)- eauiDEUIA!?()") #modparam("topoh", "mask_key", "TEAI32l") modparam("topoh", "mask_ip", "127.3.4.84") modparam("topoh", "sanity_checks", 1) modparam("topoh", "event_mode", 1)

When I do not load topoh for the otherwise same configuration, I guess this is the corresponding ACK (avoiding topoh):

ACK sip:test-gnome-calls@bapha.be;gr=urn:uuid:f2f5a3cf-a0fb-0047-be50-740fb9bdc562 SIP/2.0 Via: SIP/2.0/TCP 144.76.142.78;branch=z9hG4bKeb9b.c2d7e402c761cb6fd66ef32158f8027e.0 Via: SIP/2.0/WSS fcgmb3ib9e9m.invalid;rport=33508;received=144.76.142.78;branch=z9hG4bK1390926 Max-Forwards: 69 To: sip:test-gnome-calls@bapha.be;tag=uPOadoD From: "Online https://sip.bapha.be" sip:online@bapha.be;tag=cka2tgnhpn Call-ID: scvdj9ijv4khq7lg68jl CSeq: 5381 ACK Supported: outbound User-Agent: SIP.js/0.7.8 Content-Length: 0

Then things work without problems.

Greetings Dilyan

-----Original Message----- From: Дилян Палаузов dpa-kamailio@bapha.be To: Kamailio - Users Mailing List sr-users@lists.kamailio.org Subject: Depending on topoh.mask_key Kamailio either cannot parse RURIs or reads invalid data Date: 01/31/2023 10:28:05 AM

Hello,

when I use

dns_try_naptr=on corelog=-1 debug=-1 enable_tls=yes use_dns_cache=off dns_cache_init=off modparam("topoh", "mask_key", "TEAI32l)- eauiDEUIA!?()")

and run Kamailio under valgrind, Kamailio logs:

20(21) ERROR: kemix [kemix_mod.c:229]: ki_kx_get_ruri_attr(): failed to parse the R-URI 20(21) ERROR: rr [loose.c:1011]: loose_route_mode(): failed to parse Request URI

The workflow is: I start Kamailio.  A UDP-client registers.  Then a websocket client calls the UDP-client.  Finally the websocket client hangs up. Valgrind does not report anything suspicious.

When I use instead

modparam("topoh", "mask_key", "TEAI32l")

for the same workflow, with the same configuration, valgrind logs:

==14== Invalid read of size 4 ==14==    at 0x4867E5: atomic_cmpxchg_int (atomic_x86.h:224) ==14==    by 0x486830: futex_get (futexlock.h:99) ==14==    by 0x490CE4: dns_hash_get (dns_cache.c:673) ==14==    by 0x4972A6: dns_get_entry (dns_cache.c:2001) ==14==    by 0x499288: dns_srv_get_he (dns_cache.c:2455) ==14==    by 0x597AAD: no_naptr_srv_sip_resolvehost (resolve.c:1599) ==14==    by 0x598332: naptr_sip_resolvehost (resolve.c:1675) ==14==    by 0x5983C5: _sip_resolvehost (resolve.c:1707) ==14==    by 0x49943B: dns_srv_sip_resolvehost (dns_cache.c:2516) ==14==    by 0x49B3DD: dns_sip_resolvehost (dns_cache.c:2738) ==14==    by 0x59846A: sip_hostport2su (resolve.c:1727) ==14==    by 0x4CB951: forward_request (forward.c:515) ==14==    by 0x99993CD: t_relay_to (t_funcs.c:300) ==14==    by 0x99EBA32: _w_t_relay_to (tm.c:1764) ==14==    by 0x99F4DEB: ki_t_relay (tm.c:2917) ==14==    by 0xA80A94B: sr_kemi_lua_exec_func_ex (app_lua_api.c:1022) ==14==    by 0xA81237D: sr_kemi_lua_exec_func (app_lua_api.c:1706) ==14==    by 0xA81B93F: sr_kemi_lua_exec_func_209 (app_lua_kemi_export.c:1717) ==14==    by 0xA8383C0: luaD_precall (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA84C4CA: luaV_execute (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA838C90: luaD_callnoyield (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA837029: luaD_rawrunprotected (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA8391DF: luaD_pcall (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA8333DE: lua_pcallk (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA806F0C: app_lua_run_ex (app_lua_api.c:773) ==14==    by 0xA825F06: sr_kemi_config_engine_lua (app_lua_mod.c:119) ==14==    by 0x5048BE: sr_kemi_route (kemi.c:3784) ==14==    by 0x588909: receive_msg (receive.c:502) ==14==    by 0xA609ADF: ws_frame_receive (ws_frame.c:644) ==14==    by 0x4BCAAB: sr_event_exec (events.c:299) ==14==  Address 0x0 is not stack'd, malloc'd or (recently) free'd ==14== ==14== ==14== Process terminating with default action of signal 11 (SIGSEGV): dumping core ==14==  Access not within mapped region at address 0x0 ==14==    at 0x4867E5: atomic_cmpxchg_int (atomic_x86.h:224) ==14==    by 0x486830: futex_get (futexlock.h:99) ==14==    by 0x490CE4: dns_hash_get (dns_cache.c:673) ==14==    by 0x4972A6: dns_get_entry (dns_cache.c:2001) ==14==    by 0x499288: dns_srv_get_he (dns_cache.c:2455) ==14==    by 0x597AAD: no_naptr_srv_sip_resolvehost (resolve.c:1599) ==14==    by 0x598332: naptr_sip_resolvehost (resolve.c:1675) ==14==    by 0x5983C5: _sip_resolvehost (resolve.c:1707) ==14==    by 0x49943B: dns_srv_sip_resolvehost (dns_cache.c:2516) ==14==    by 0x49B3DD: dns_sip_resolvehost (dns_cache.c:2738) ==14==    by 0x59846A: sip_hostport2su (resolve.c:1727) ==14==    by 0x4CB951: forward_request (forward.c:515) ==14==    by 0x99993CD: t_relay_to (t_funcs.c:300) ==14==    by 0x99EBA32: _w_t_relay_to (tm.c:1764) ==14==    by 0x99F4DEB: ki_t_relay (tm.c:2917) ==14==    by 0xA80A94B: sr_kemi_lua_exec_func_ex (app_lua_api.c:1022) ==14==    by 0xA81237D: sr_kemi_lua_exec_func (app_lua_api.c:1706) ==14==    by 0xA81B93F: sr_kemi_lua_exec_func_209 (app_lua_kemi_export.c:1717) ==14==    by 0xA8383C0: luaD_precall (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA84C4CA: luaV_execute (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA838C90: luaD_callnoyield (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA837029: luaD_rawrunprotected (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA8391DF: luaD_pcall (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA8333DE: lua_pcallk (in /lib64/kamailio/modules/app_lua.so) ==14==    by 0xA806F0C: app_lua_run_ex (app_lua_api.c:773) ==14==    by 0xA825F06: sr_kemi_config_engine_lua (app_lua_mod.c:119) ==14==    by 0x5048BE: sr_kemi_route (kemi.c:3784) ==14==    by 0x588909: receive_msg (receive.c:502) ==14==    by 0xA609ADF: ws_frame_receive (ws_frame.c:644) ==14==    by 0x4BCAAB: sr_event_exec (events.c:299)

The stacktrace with the values of the variables is available at https://github.com/kamailio/kamailio/issues/3350%C2%A0.%C2%A0 Or at least these things seem very similar to me.

Any idea?

I can share the OCI-image and the full configuration.

Greetings   Дилян

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