[asterisk-bugs] [JIRA] (ASTERISK-28459) Asterisk is dropping part of a string passed to functions

[Jan Blom (JIRA)]

Jan Blom created ASTERISK-28459:
-----------------------------------

             Summary: Asterisk is dropping part of a string passed to functions
                 Key: ASTERISK-28459
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28459
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Functions/General
    Affects Versions: 16.4.0
         Environment: CentOS Linux release 7.6 with Asterisk 16.4.0
            Reporter: Jan Blom


We need to pass around variables containing special characters, i.e. non-alfanumeric chars. This typically include SIP Call-Id from some vendors.

We have so far managed to deal with all situations using quotes and escape character in accordance with https://wiki.asterisk.org/wiki/display/AST/Parameter+Quoting.

However when having a string containing a closing parenthesis _and_ a colon, the string gets cut-off when passing it to a function. This becomes a big issue for us since this affects ODBC database calls as well as for example SQL_ESC() function. 

Calling this dialplan results in the output below:
{code}
[test]
exten => main,1,NoOp
 same => n,Set(LOCAL(input)=1234ab)cd:efg)

 same => n,Verbose(0,--- Test 1 ---)
 same => n,Verbose(0,Input:    ${input})
 same => n,Gosub(sub,1(${input}))
 same => n,Set(LOCAL(output)=${GOSUB_RETVAL})
 same => n,Verbose(0,Output:   ${output})
 same => n,Verbose(0,Function: ${PASSTHRU(${input})})

 same => n,Verbose(0,--- Test 2 ---)
 same => n,Verbose(0,Input:    ${input})
 same => n,Gosub(sub,1("${input}"))
 same => n,Set(LOCAL(output)=${GOSUB_RETVAL})
 same => n,Verbose(0,Output:   ${output})
 same => n,Verbose(0,Function: ${PASSTHRU("${input}")})

 same => n,Verbose(0,--- Test done ---)
 same => n,Return


exten => sub,1,NoOp
 same => n,Verbose(0,In sub:   ${ARG1})
 same => n,Return(${ARG1})
{code}

Result:
{noformat}
--- Test 1 ---
Input:    1234ab)cd:efg
In sub:   1234ab)cd:efg
Output:   1234ab)cd:efg
Function: 1234ab
--- Test 2 ---
Input:    1234ab)cd:efg
In sub:   "1234ab)cd:efg"
Output:   "1234ab)cd:efg"
Function: "1234ab
--- Test done ---
{noformat}

You can see the cut-off string returned from PASSTHRU(). We could use any function that takes a string as input and have the same result. The test shows that calling subroutines with Gosub works fine though. 

It doesn't matter if we surround the string in quotes (the difference between Test 1 ans Test 2) or if we escape the parenthesis and/or colon in any combination with a backslash. We always get the corrupted string passed into the function. 

We haven't been to find any workaround to this problem. It breaks our database calling, using ODBC. 



--
This message was sent by Atlassian JIRA
(v6.2#6252)