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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/1042/">https://reviewboard.asterisk.org/r/1042/</a>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Looks good so far, here's a few comments.</pre>
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<a href="https://reviewboard.asterisk.org/r/1042/diff/2/?file=14623#file14623line22853" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/channels/chan_sip.c</a>
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(Diff revision 2)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static void handle_response_message(struct sip_pvt *p, int resp, const char *rest, struct sip_request *req, int seqno)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">((</span><span class="n">p</span><span class="o">-></span><span class="n">authtries</span> <span class="o">==</span> <span class="n">MAX_AUTHTRIES</span><span class="p">))</span> <span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ast_log</span><span class="p">(</span><span class="n">LOG_NOTICE</span><span class="p">,</span> <span class="s">"Failed to authenticate on MESSAGE to '%s'</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">get_header</span><span class="p">(</span><span class="o">&</span><span class="n">p</span><span class="o">-></span><span class="n">initreq</span><span class="p">,</span> <span class="s">"From"</span><span class="p">));</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">pvt_set_needdestroy</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="s">"MESSAGE authentication failed"</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">If you're giving up on AUTH, shouldn't it just return here? By falling through it looks like you're going to attempt to transmit again.</pre>
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<a href="https://reviewboard.asterisk.org/r/1042/diff/2/?file=14631#file14631line58" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/message.h</a>
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(Diff revision 2)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_msg_tech_unregister(const struct ast_msg_tech *tech);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">struct</span> <span class="n">ast_msg</span> <span class="o">*</span><span class="n">ast_msg_alloc</span><span class="p">(</span><span class="kt">void</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Is there anyway you can abstract away needing to know that the ast_msg is an ao2 object? Maybe an alloc and destroy function?!</pre>
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<a href="https://reviewboard.asterisk.org/r/1042/diff/2/?file=14631#file14631line74" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/message.h</a>
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(Diff revision 2)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_msg_tech_unregister(const struct ast_msg_tech *tech);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="kt">int</span> <span class="n">ast_msg_queue</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_msg</span> <span class="o">*</span><span class="n">msg</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Some documentation would be nice for this function. It was not immediately obvious to me how the msg ref would be handled on failure. I probably would have tried to unref it myself, and this function does that for you.</pre>
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<a href="https://reviewboard.asterisk.org/r/1042/diff/2/?file=14634#file14634line577" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/message.c</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int msg_send_exec(struct ast_channel *chan, const char *data)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/*</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * The message lock is held here to safely allow the technology</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * implementation access the message fields without worrying</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * that they could change.</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ast_module_ref</span><span class="p">(</span><span class="n">tech_holder</span><span class="o">-></span><span class="n">mod</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ao2_lock</span><span class="p">(</span><span class="n">msg</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">res</span> <span class="o">=</span> <span class="n">tech_holder</span><span class="o">-></span><span class="n">tech</span><span class="o">-></span><span class="n">msg_send</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="n">args</span><span class="p">.</span><span class="n">to</span><span class="p">,</span> <span class="n">args</span><span class="p">.</span><span class="n">from</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ao2_unlock</span><span class="p">(</span><span class="n">msg</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ast_module_unref</span><span class="p">(</span><span class="n">tech_holder</span><span class="o">-></span><span class="n">mod</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I don't understand how we are guaranteed this module will still be in memory here.
I understand adding the ref guarantees that the mod pointer will stay around until after the message is sent, but what is guaranteeing that the mod pointer is valid before the message is sent? There is no ref given to that pointer before then.
Is it not possible the module could be unloaded yet the tech_holder object pointing to that module still exist in this function because we have a ref for the tech_holder?</pre>
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<p>- David</p>
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<p>On December 13th, 2010, 1:37 p.m., Russell Bryant wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Russell Bryant.</div>
<p style="color: grey;"><i>Updated 2010-12-13 13:37:44</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This branch contains a proposal for adding protocol independent support for processing text messages into and out of the dialplan, outside of a call. The file doc/asterisk-messaging.txt contains more details on the proposal. The introduction of the document is quoted here:
" Asterisk has some limited support today for messaging. The support that
exists primarily includes passing text messages in the context of a call. The
SIP and IAX2 protocols have support for this, but that's it.
There are a couple of other messaging protocols that are supported: Skype
and XMPP (Jabber). The support of these is very minimal and not very integrated
into the architecture of Asterisk since these messages are not in the context of
a phone call. They provide a combination of dialplan and manager interface
interfaces that are specific to each protocol. There just is no current
architectural concept of dealing with text messages.
The purpose of this proposal is to introduce text messaging into the
architecture of Asterisk. For messaging support to exist in the true spirit of
Asterisk architecture, the design needs to achieve the following two goals:
a) Protocol Independence
b) Scriptable message routing
The rest of this document goes through some details about how these goals
will be achieved in a way that is both architecturally compatible with Asterisk
as well as practical to implement."
----------
In addition to the documented proposal, I have made some good progress on implementation. While the document includes some ideas for future enhancements, what is there so far should be usable.
- core modifications to allow sending incoming messages through the dialplan
- core modifications to allow outbound messages from the dialplan
- modifications to res_jabber to allow inbound and outbound messages in the new architecture
- changes to chan_sip to support inbound and outbound MESSAGE outside of a call</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">svn/testsuite/asterisk/team/russell/messaging:
- This branch of the testsuite contains my tests for this branch, which include:
- tests/sip/message_disabled
- Ensure MESSAGE outside of a call is rejected when disabled.
- tests/sip/message_unauth
- When enabled, test sending a MESSAGE to Asterisk and send another back out from the dialplan.
- tests/sip/message_auth
- Same as the last test, but authenticate MESSAGE both inbound and outbound.
- tests/sip/message_from_call
- Set up a normal SIP call and send an out of call MESSAGE from the dialplan processing the call
I have also written some simple apps using the pjsua Python module from pjsip that can send and receive messages sent through Asterisk.
Lastly, I have done some manual testing of XMPP messages in and out of Asterisk using this code.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/res/res_jabber.c <span style="color: grey">(298284)</span></li>
<li>/trunk/include/asterisk/jabber.h <span style="color: grey">(298284)</span></li>
<li>/trunk/include/asterisk/message.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/main/asterisk.c <span style="color: grey">(298284)</span></li>
<li>/trunk/main/channel.c <span style="color: grey">(298284)</span></li>
<li>/trunk/main/message.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/include/asterisk/_private.h <span style="color: grey">(298284)</span></li>
<li>/trunk/include/asterisk/channel.h <span style="color: grey">(298284)</span></li>
<li>/trunk/configs/jabber.conf.sample <span style="color: grey">(298284)</span></li>
<li>/trunk/configs/sip.conf.sample <span style="color: grey">(298284)</span></li>
<li>/trunk/doc/asterisk-messaging.txt <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/channels/sip/include/sip.h <span style="color: grey">(298284)</span></li>
<li>/trunk/channels/chan_sip.c <span style="color: grey">(298284)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/1042/diff/" style="margin-left: 3em;">View Diff</a></p>
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