Richard

On 7 January 2013 01:10, Richard Brady <rnbrady@gmail.com> wrote:

Agreed, doesn't make sense to me either.

The code is in the decode2format function in siputils/contact_ops.c:

if (((*pos) == '>')||(*pos == ';'))

{

/* invalid chars inside username part */

return -5;

}

The ABNF in RFC3261 makes it clear that a semicolon is ok in the user-info field:

userinfo = ( user / telephone-subscriber ) [ ":" password ] "@"

user = 1*( unreserved / escaped / user-unreserved )

user-unreserved = "&" / "=" / "+" / "$" / "," / ";" / "?" / "/"

The code might be to check for the end of a URI (both those characters terminate a URI under certain circumstances), perhaps for fault tolerance and/or security but I don't think it's been done in a way that makes sense, for the following reasons:

1. An angle bracket is not legal in or surrounding a request URI, so it should be picked up by the parser and/or sanity check.

2. A semicolon is totally legal in the userinfo part, as per ABNF and also as explained in RFC3261:

...

sip:alice;day=tuesday@atlanta.com

The last sample URI above has a user field value of

"alice;day=tuesday". The escaping rules defined above allow a

semicolon to appear unescaped in this field. For the purposes of

this protocol, the field is opaque. The structure of that value is

only useful to the SIP element responsible for the resource.

So I have raised bug FS#263: http://sip-router.org/tracker/index.php?do=details&task_id=263

Richard

On 3 January 2013 13:28, Gareth Rylance <gareth@rylance.me.uk> wrote:

Anyone?

If no one objects I will submit a patch with it removed.

On 18 December 2012 09:11, Gareth Rylance <gareth@rylance.me.uk> wrote:

When using the siputils function encode_contact() on a message that contains a user parameter e.g.

<sip:XXXXX00015;phone-context=national@10.YYY.1.92;user=phone>;tag=88930

it encodes fine e.g.

<sip:natted_ua*sip:XXXXX00015;phone-context=national**192.168.242.102*5080*udp@10.YYY.70.100>

but decode_contact() errors due to the ";" (there is an explicit check for it in the code)

I am currently working round this using

$rU = $(rU{s.replace,;,:});

to remove the ; as the user part is not needed for my application.

Would it be safe to remove the check for ";" ?

Gareth

_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users