SIP INVITE in-dialog

This indicator is added to the info column by Wireshark when it finds a "tag" added in one of the headers of an INVITE, SUBSCRIBE or REFER message.

Deducted from the following part of the sip dissector:

                        parameter_offset = offset;
                        while (parameter_offset < line_end_offset
                               && (tvb_strneql(tvb, parameter_offset, "tag=", 4) != 0))
                            parameter_offset++;
                    if ( parameter_offset &lt; line_end_offset ){ /* Tag found */
                        parameter_offset = parameter_offset + 4;
                        parameter_end_offset = tvb_find_guint8(tvb, parameter_offset,
                                                               (line_end_offset - parameter_offset), &#39;;&#39;);
                        if ( parameter_end_offset == -1)
                            parameter_end_offset = line_end_offset;
                        parameter_len = parameter_end_offset - parameter_offset;
                        proto_tree_add_item(sip_element_tree, hf_sip_to_tag, tvb, parameter_offset,
                                            parameter_len, ENC_ASCII|ENC_NA);
                        item = proto_tree_add_item(sip_element_tree, hf_sip_tag, tvb, parameter_offset,
                                                   parameter_len, ENC_ASCII|ENC_NA);
                        PROTO_ITEM_SET_HIDDEN(item);

                        /* Tag indicates in-dialog messages, in case we have a INVITE, SUBSCRIBE or REFER, mark it */
                        switch (current_method_idx) {

                        case SIP_METHOD_INVITE:
                        case SIP_METHOD_SUBSCRIBE:
                        case SIP_METHOD_REFER:
                            col_append_str(pinfo-&gt;cinfo, COL_INFO, &quot;, in-dialog&quot;);
                            break;
                        }
                    }</code></pre></div><div class="answer-controls post-controls"></div><div class="post-update-info-container"><div class="post-update-info post-update-info-user"><p>answered <strong>19 Jun '13, 04:21</strong></p><img src="https://secure.gravatar.com/avatar/7901a94d8fdd1f9f47cda9a32fcfa177?s=32&amp;d=identicon&amp;r=g" class="gravatar" width="32" height="32" alt="SYN-bit&#39;s gravatar image" /><p><span>SYN-bit ♦♦</span><br />

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