21 Jan
2013
21 Jan
'13
9:13 p.m.
Patch attached.
Should this be cross posted to [sr-dev] if it contains a patch?
Richard
On 7 January 2013 01:10, Richard Brady <rnbrady(a)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(a)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(a)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
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