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<tt>You have my answer inline.<br>
<br>
</tt>
<pre class="moz-signature" cols="72">Răzvan Crainea
OpenSIPS Solutions
<a class="moz-txt-link-abbreviated" href="http://www.opensips-solutions.com">www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 01/18/2017 08:17 PM, Ramachandran,
Agalya (Contractor) wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal"><span style="color:black">Hi Razvan, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Got your point.</span><span
style="color:black"> I tried to increase the
MAX_CONTENT_TYPE_LEN and tested async call and it is
working fine without crash.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">But one more
question. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">The same piece of
code am using for
<b>sync REST_API</b> query too in rest_put() method. There
also print_buff is only being used.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">It is working
absolutely fine in the case of sync call even if the
</span><span style="color:black">MAX_CONTENT_TYPE_LEN – is 64.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Wondering what
would be the reason in sync call, it is working and in async
it is not?</span></p>
</div>
</blockquote>
Pure luck. You are doing a buffer overflow, overwriting the data
section. Probably when doing sync calls, nobody is using the data
you are overwriting. But if it doesn't crash it doesn't mean it is
ok :).<br>
<blockquote
cite="mid:9db8366c20274e289a11c722eac65189@COPDCEX28.cable.comcast.com"
type="cite">
<div class="WordSection1">
<p class="MsoNormal"><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Agalya<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span
style="color:windowtext"> Users
[<a class="moz-txt-link-freetext" href="mailto:users-bounces@lists.opensips.org">mailto:users-bounces@lists.opensips.org</a>]
<b>On Behalf Of </b>Razvan Crainea<br>
<b>Sent:</b> Wednesday, January 18, 2017 4:29 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:users@lists.opensips.org">users@lists.opensips.org</a><br>
<b>Subject:</b> Re: [OpenSIPS-Users] async- issues-
2.2.2<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi, Ramachandran!<br>
<br>
The print_buff buffer is declared with length
MAX_CONTENT_TYPE_LEN -> 64. Writing more than 64 bytes will
lead to a buffer overflow, probably followed by a crash.<br>
If you want to suppor longer CallIDs, just increase the size
of the buffer, or allocate the buffer with a size large
enought to fit your callid length.<br>
<br>
Best regards,<br>
<br>
<span style="font-size:12.0pt"><o:p></o:p></span></p>
<pre>Răzvan Crainea<o:p></o:p></pre>
<pre>OpenSIPS Solutions<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.opensips-solutions.com">www.opensips-solutions.com</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 01/17/2017 11:13 PM, Ramachandran,
Agalya (Contractor) wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Hi Liviu, <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Found the exact issue what causes the
crash. <o:p></o:p></p>
<p class="MsoNormal">In start_async_http_req, under case
PUT/POST, we have the following code
<span style="color:blue">blue color </span>by default. <o:p></o:p></p>
<p class="MsoNormal">But for my project scenario, I need to
add call-id header too here, including that code
<span style="color:red">in red color </span>for your
reference. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">if (req_ctype) {</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">
sprintf(print_buff, "Content-Type: %s", req_ctype);</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">
header_list = curl_slist_append(header_list, print_buff);</span><o:p></o:p></p>
<p class="MsoNormal"> <span
style="color:red">sprintf(print_buff, "Call-Id: %s",
instanceId);</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:red">
header_list = curl_slist_append(header_list, print_buff);</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">
w_curl_easy_setopt(handle, CURLOPT_HTTPHEADER,
header_list);</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">
}</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">If I try by removing the Call-Id header
in the curl-slist, then it works perfectly fine in case of
POST as well as PUT.
<o:p></o:p></p>
<p class="MsoNormal">How can I overcome this situation? Your
guidance would help me a lot.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Regards,<br>
Agalya<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Users [<a
moz-do-not-send="true"
href="mailto:users-bounces@lists.opensips.org">mailto:users-bounces@lists.opensips.org</a>]
<b>On Behalf Of </b>Ramachandran, Agalya (Contractor)<br>
<b>Sent:</b> Tuesday, January 17, 2017 3:58 PM<br>
<b>To:</b> OpenSIPS users mailling list <a
moz-do-not-send="true"
href="mailto:users@lists.opensips.org">
<users@lists.opensips.org></a>; Liviu Chircu <a
moz-do-not-send="true"
href="mailto:liviu@opensips.org">
<liviu@opensips.org></a><br>
<b>Subject:</b> Re: [OpenSIPS-Users] async- issues-
2.2.2<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Hi, </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Another
information may help you to find this issue.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Am changing the
“req_body” in the rest_methods.c, as per the REST API
server is expecting the payload value.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">If I change this
“req_body” in <b>REST_POST</b> as well, and if the
<b>Call-Id length is > 56</b>, it crashes in <b>the
POST call too</b>. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Regards,<br>
Agalya</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Users [<a
moz-do-not-send="true"
href="mailto:users-bounces@lists.opensips.org">mailto:users-bounces@lists.opensips.org</a>]
<b>On Behalf Of </b>Ramachandran, Agalya (Contractor)<br>
<b>Sent:</b> Tuesday, January 17, 2017 3:03 PM<br>
<b>To:</b> OpenSIPS users mailling list <<a
moz-do-not-send="true"
href="mailto:users@lists.opensips.org">users@lists.opensips.org</a>>;
Liviu Chircu <<a moz-do-not-send="true"
href="mailto:liviu@opensips.org">liviu@opensips.org</a>><br>
<b>Subject:</b> [OpenSIPS-Users] async- issues- 2.2.2<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Hi Liviu/team, </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">When I try to do
an asynchronous REST_PUT call in OpenSIPS 2.2.2, I see the
below observance and issues.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">All the calls
are made from sipp client.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<table class="MsoNormalTable" style="border-collapse:collapse"
border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td style="width:31.1pt;border:solid windowtext
1.0pt;padding:0in 5.4pt 0in 5.4pt" valign="top"
width="41">
<p class="MsoNormal"><b><span style="color:blue">No</span></b><o:p></o:p></p>
</td>
<td style="width:139.5pt;border:solid windowtext
1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt"
valign="top" width="186">
<p class="MsoNormal"><b><span style="color:blue">Test
Scenario </span></b><o:p></o:p></p>
</td>
<td style="width:296.9pt;border:solid windowtext
1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt"
valign="top" width="396">
<p class="MsoNormal"><b><span style="color:blue">Result/observation</span></b><o:p></o:p></p>
</td>
</tr>
<tr>
<td style="width:31.1pt;border:solid windowtext
1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
valign="top" width="41">
<p class="MsoNormal"><span style="color:blue">1.</span><o:p></o:p></p>
</td>
<td
style="width:139.5pt;border-top:none;border-left:none;border-bottom:solid
windowtext 1.0pt;border-right:solid windowtext
1.0pt;padding:0in 5.4pt 0in 5.4pt" valign="top"
width="186">
<p class="MsoNormal"><span style="color:blue">Call-Id
length < 50</span><o:p></o:p></p>
</td>
<td
style="width:296.9pt;border-top:none;border-left:none;border-bottom:solid
windowtext 1.0pt;border-right:solid windowtext
1.0pt;padding:0in 5.4pt 0in 5.4pt" valign="top"
width="396">
<p class="MsoNormal"><span style="color:blue">Works
perfectly fine</span><o:p></o:p></p>
</td>
</tr>
<tr>
<td style="width:31.1pt;border:solid windowtext
1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
valign="top" width="41">
<p class="MsoNormal"><span style="color:blue">2</span><o:p></o:p></p>
</td>
<td
style="width:139.5pt;border-top:none;border-left:none;border-bottom:solid
windowtext 1.0pt;border-right:solid windowtext
1.0pt;padding:0in 5.4pt 0in 5.4pt" valign="top"
width="186">
<p class="MsoNormal"><span style="color:blue">Call-Id
length >54 and < 56</span><o:p></o:p></p>
</td>
<td
style="width:296.9pt;border-top:none;border-left:none;border-bottom:solid
windowtext 1.0pt;border-right:solid windowtext
1.0pt;padding:0in 5.4pt 0in 5.4pt" valign="top"
width="396">
<p class="MsoNormal"><span style="color:blue">No crash
observed. But error in curl_multiperform</span><o:p></o:p></p>
</td>
</tr>
<tr>
<td style="width:31.1pt;border:solid windowtext
1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
valign="top" width="41">
<p class="MsoNormal"><span style="color:blue">3. </span><o:p></o:p></p>
</td>
<td
style="width:139.5pt;border-top:none;border-left:none;border-bottom:solid
windowtext 1.0pt;border-right:solid windowtext
1.0pt;padding:0in 5.4pt 0in 5.4pt" valign="top"
width="186">
<p class="MsoNormal"><span style="color:blue">Call-Id
length > 56 </span><o:p></o:p></p>
</td>
<td
style="width:296.9pt;border-top:none;border-left:none;border-bottom:solid
windowtext 1.0pt;border-right:solid windowtext
1.0pt;padding:0in 5.4pt 0in 5.4pt" valign="top"
width="396">
<p class="MsoNormal"><span style="color:blue">Opensips
crashes at liburl. </span>
<o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Please find the
details for test 2 and test 3.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">I have tested
with REST_POST with case 3, I didn’t observe any crashes.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Please let me
know what could cause this issue and how can I fix this?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:blue">Test2:</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:blue"> </span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">Jan 17
18:23:13 /usr/local/sbin/opensips[18554]:
ERROR:rest_client:start_async_http_req:
curl_multi_perform: Invalid multi handle</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">Jan 17
18:23:13 /usr/local/sbin/opensips[18554]:
ERROR:rest_client:start_async_http_req:
curl_multi_remove_handle: Invalid multi handle</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:blue">Test 3:</span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">(gdb) bt</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#0
0x00007f370bccb9bb in curl_multi_add_handle () from
/lib64/libcurl.so.4</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#1
0x00007f370bf05521 in start_async_http_req
(msg=msg@entry=0x7f374db14270,
method=method@entry=REST_CLIENT_PUT,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">
url=0x7f374dad8178 "<a moz-do-not-send="true"
href="http://url">http://url</a>",
req_body=<optimized out>,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">
req_ctype=<optimized out>,
out_handle=out_handle@entry=0x7f374db204e0,
body=body@entry=0x7f374db204e8, ctype=0x7f374db204f8)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000"> at
rest_methods.c:227</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#2
0x00007f370bf0e2ca in w_async_rest_put
(msg=0x7f374db14270, resume_f=0x7ffc6f551680,
resume_param=0x7ffc6f551690,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">
gp_url=<optimized out>, gp_body=<optimized
out>, gp_ctype=<optimized out>,
body_pv=0x7f374daf5510 "N",</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">
ctype_pv=0x7f374daf55a8 "N", code_pv=0x7f374daf5670 "N")
at rest_client.c:579</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#3
0x00007f370d24920f in t_handle_async (msg=0x7f374db14270,
a=0x7f374dad8508, resume_route=<optimized out>) at
async.c:240</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#4
0x000000000042d724 in do_action (a=a@entry=0x7f374dad8680,
msg=msg@entry=0x7f374db14270) at action.c:1863</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#5
0x00000000004341cc in run_action_list (a=<optimized
out>, msg=0x7f374db14270) at action.c:172</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#6
0x0000000000430769 in do_action (a=a@entry=0x7f374dad8760,
msg=msg@entry=0x7f374db14270) at action.c:1108</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#7
0x000000000043454d in run_action_list (msg=<optimized
out>, a=<optimized out>) at action.c:172</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#8
run_actions (a=<optimized out>, msg=0x7f374db14270)
at action.c:137</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#9
0x000000000042f8d7 in do_action (a=a@entry=0x7f374dad6b58,
msg=msg@entry=0x7f374db14270) at action.c:745</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#10
0x0000000000434393 in run_action_list (msg=<optimized
out>, a=<optimized out>) at action.c:172</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#11
run_actions (msg=0x7f374db14270, a=<optimized out>)
at action.c:137</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#12
run_top_route (a=<optimized out>,
msg=msg@entry=0x7f374db14270) at action.c:204</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#13
0x000000000043bcba in receive_msg (</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">
buf=0x858c20 <buf.8277> "INVITE
<a moz-do-not-send="true"
href="sip:+19084904567@10.10.10.05060">sip:+19084904567@10.10.10.05060</a>
SIP/2.0\r\nTo: <<a moz-do-not-send="true"
href="sip:+19084904567@test.comcast.net;user=phone">sip:+19084904567@test.comcast.net;user=phone</a>>\r\nFrom:
\"test PA\"<<a moz-do-not-send="true"
href="sip:+16507083454@10.0.0.1:32004;user=phone;isup-oli=00">sip:+16507083454@10.0.0.1:32004;user=phone;isup-oli=00</a>>;"...,
len=<optimized out>,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">
rcv_info=rcv_info@entry=0x7ffc6f552c70,
existing_context=existing_context@entry=0x0) at
receive.c:208</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#14
0x00000000005b0b03 in udp_read_req (si=<optimized
out>, bytes_read=<optimized out>) at
net/proto_udp/proto_udp.c:192</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#15
0x000000000059b960 in handle_io (idx=<optimized
out>, event_type=<optimized out>,
fm=<optimized out>) at net/net_udp.c:259</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#16
io_wait_loop_epoll (h=<optimized out>,
t=<optimized out>, repeat=<optimized out>) at
net/../io_wait_loop.h:225</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#17
udp_rcv_loop (si=si@entry=0x7f374dacb6c8) at
net/net_udp.c:308</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#18
0x000000000059ce88 in udp_start_processes
(chd_rank=chd_rank@entry=0x845830 <chd_rank.11028>,
startup_done=startup_done@entry=0x0)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000"> at
net/net_udp.c:372</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#19
0x0000000000419f50 in main_loop () at main.c:671</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#C00000">#20 main
(argc=<optimized out>, argv=<optimized out>)
at main.c:1261</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:blue">Regards,<br>
Agalya</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Users mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><o:p></o:p></pre>
</blockquote>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
</div>
<br>
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<br>
<pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a>
<a class="moz-txt-link-freetext" href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a>
</pre>
</blockquote>
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