[asterisk-bugs] [JIRA] (ASTERISK-27047) res_pjsip user_eq_phone=yes adds user=phone to From: "anonymous" <sip:anonymous at anonymous.invalid>

[dtryba (JIRA)]

dtryba created ASTERISK-27047:
---------------------------------

             Summary: res_pjsip user_eq_phone=yes adds user=phone to From: "anonymous" <sip:anonymous at anonymous.invalid>
                 Key: ASTERISK-27047
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27047
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_pjsip
    Affects Versions: 13.14.1
         Environment: Debian 8
            Reporter: dtryba
            Severity: Minor


With pjsip (asterisk 13.14.1) I see the problem that an anonymous from
header gets user=phone appendend to the URI if user_eq_phone=yes is
specified:

On the incoming leg:
From: anonymous <sip:anonymous at anonymous.invalid:5060>;tag=Q5zBj7BMnvI6Fe6O2866fox3ZHmn-smt
Get transformed to
From: "Anonymous" <sip:anonymous at anonymous.invalid;user=phone>;tag=fa3cb748-6af9-485f-8a70-a2b9ad40b13a
on the outgoing leg.

Setting user_eq_phone = no will result in user=phone not being added.
The upstream provide demands user=phone in URIs if the username
resembles a phonenumber, but declines the INVITE if user=phone is
present on an anonymous username.

Looking at the code,res/res_pjsip.c function ast_sip_add_usereqphone is
the only place I see that might add user=phone:

{code}
        int i = 0;
        //.....
        if (pj_strbuf(&sip_uri->user)[0] == '+') {
                i = 1;
        }

        /* Test URI user against allowed characters in AST_DIGIT_ANY */
        for (; i < pj_strlen(&sip_uri->user); i++) {
                if (!strchr(AST_DIGIT_ANYNUM, pj_strbuf(&sip_uri->user)[i])) {
                        break;
                }
        }

        if (i < pj_strlen(&sip_uri->user)) {
                return;
        }

         //add user=phone if we get to the code below
{code}

sip_uri->user should be "anonymous"
AST_DIGIT_ANY is: #define AST_DIGIT_ANYNUM "0123456789"

So in the for loop the first char of sip_uri->user should result in a
NULL from strchr. Leaving i at the value 0, which is smaller than the
length of sip_uri->user. And thus the function should return before
adding the user=phone. 

So why is user=phone being added?



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