<div dir="ltr"><div>Your first group is matching From: <sip:anonymous@[2008:abcd:<wbr>1234:2260:208:5dff:fe93:5b6 but it looks like you want it to only match <sip:anonymous@. Try escaping the brackets, the regex engine is interpreting them as a list instead of matching the literal "[]" characters.</div><div><br></div><div>subst('/^From:(.*)\[2008:abcd:<wbr>1234:2260:208:5dff:fe93:5b65\](<wbr>.*)>(.*)/From:\1[2008:abcd:<wbr>1234:2260:20c:29ff:fe9a:b9cb]><wbr>\3/ig');<br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><p> </p>
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<br><div class="gmail_quote">On Mon, Jul 2, 2018 at 9:40 AM, mahesh b <span dir="ltr"><<a href="mailto:mahesh.b.2487@gmail.com" target="_blank">mahesh.b.2487@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks John for the Reply.<div><br></div><div>So if i understand properly :</div><div>group 1 is here <sip:anonymous@</div><div>group 2 is empty</div><div>group 3 is
<span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">;tag=41008079_nab_FFFF_isp_</span><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">FFF<wbr>F_cco_FFFF_igo_FFFF_mgt_</span><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">78DD</span>
</div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br></span></div><div>the previous expression is working for IPv4.</div><div><br></div><div><br></div><div>Now for IPv6</div><div><br></div><div><div>Input : From: <sip:anonymous@[2008:abcd:<wbr>1234:2260:208:5dff:fe93:5b65]><wbr>;tag=42006C96_nab_FFFF_isp_<wbr>FFFF_cco_FFFF_igo_FFFF_mgt_<wbr>8092</div><div>subst('/^From:(.*)[2008:abcd:<wbr>1234:2260:208:5dff:fe93:5b65](<wbr>.*)>(.*)/From:\1[2008:abcd:<wbr>1234:2260:20c:29ff:fe9a:b9cb]><wbr>\3/ig');</div><div>Output : From: <sip:anonymous@[2008:abcd:<wbr>1234:2260:208:5dff:fe93:5b6[<wbr>2008:abcd:1234:2260:20c:29ff:<wbr>fe9a:b9cb]>;tag=42006C96_nab_<wbr>FFFF_isp_FFFF_cco_FFFF_igo_<wbr>FFFF_mgt_8092 //what is going wrong here?</div></div><div><br></div><div>Here </div><div>group 1 is
<span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span> </span><sip:anonymous@</span>
</div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">group 2 is empty</span></div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">group 3 is
<span style="text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">;tag=42006C96_nab_FFFF_isp_<wbr>FFFF_cco_FFFF_igo_FFFF_mgt_<wbr>8092</span>
</span></div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br></span></span></div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">what mistake am i making for IPv6 ? if you see the output.</span></span></div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br></span></span></div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Regards,</span></span></div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Mahesh.b</span></span></div><div><br></div></div><br><div class="gmail_quote"><span class=""><div dir="ltr">On Mon, Jul 2, 2018 at 6:54 PM John Petrini <<a href="mailto:jpetrini@coredial.com" target="_blank">jpetrini@coredial.com</a>> wrote:<br></div></span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><div dir="ltr"><div>They are references to groups in the regex match. The groups are in parenthesis. Whatever is matched by group 1 and 3 will be included in the substitution.</div><div><br></div><div><a href="https://regexr.com/" target="_blank">https://regexr.com/</a> and <a href="https://regex101.com/" target="_blank">https://regex101.com/</a> are both good sites for building and explaining regexes.<br></div></div></span>
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