<p>Added new tm callback which is called just before sending the buffer. Also modified the PRE_RAW_PROCESSING and POST_RAW_PROCESSING callbacks from script_cb to accept more than one callback(at the moment supports only one). Modified multiple modules to accept msg_send with one more paramater, which can be used to send a parameter to POST_RAW_PROCESSING callbacks. </p>

<hr>

<h4>You can merge this Pull Request by running</h4>
<pre>  git pull https://github.com/ionutrazvanionita/opensips master</pre>
<p>Or view, comment on, or merge it at:</p>
<p>&nbsp;&nbsp;<a href='https://github.com/OpenSIPS/opensips/pull/386'>https://github.com/OpenSIPS/opensips/pull/386</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Stateful and stateless callbacks just before sending the message. One more parameter to msg_send</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-0">action.c</a>
    (6)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-1">forward.c</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-2">forward.h</a>
    (5)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-3">modules/dialog/dialog.c</a>
    (6)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-4">modules/dialog/dlg_tophiding.c</a>
    (18)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-5">modules/dialog/dlg_tophiding.h</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-6">modules/nathelper/nathelper.c</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-7">modules/seas/seas_action.c</a>
    (2)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-8">modules/siptrace/siptrace.c</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-9">modules/sl/sl_funcs.c</a>
    (2)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-10">modules/tm/t_funcs.c</a>
    (8)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-11">modules/tm/t_funcs.h</a>
    (13)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-12">modules/tm/t_fwd.c</a>
    (3)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-13">modules/tm/t_hooks.c</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-14">modules/tm/t_hooks.h</a>
    (20)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-15">receive.c</a>
    (2)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-16">script_cb.c</a>
    (103)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/OpenSIPS/opensips/pull/386/files#diff-17">script_cb.h</a>
    (12)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/OpenSIPS/opensips/pull/386.patch'>https://github.com/OpenSIPS/opensips/pull/386.patch</a></li>
  <li><a href='https://github.com/OpenSIPS/opensips/pull/386.diff'>https://github.com/OpenSIPS/opensips/pull/386.diff</a></li>
</ul>

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