[SR-Users] Strange avp_check behavior

[Klaus Darilion]

Answering myself: This is a "feature".

Assigning AVPs multiple times add an additional AVP with the same name.

To overwrite an existing AVP the following syntax is needed:

  $(avp(pattern)[*]) = .....


regards
Klaus

On 07.07.2014 12:50, Klaus Darilion wrote:
> Hi!
> 
> Kamailio 4.1.4. When using avp_check with fnmatch and AVP the result is
> always TRUE if it is true for 1 time. It only happens with $avp(), but
> not with $var().
> 
> Is this a bug or some special behavior of AVPs?
> 
> 
> xlog("L_ERR", "======= with $$avp(...)================");
> 
> $avp(rpid) = "+499539110";
> 
> $avp(pattern) = "+499539[2-5]"; # NO MATCH
> if (avp_check("$avp(rpid)", "fm/$avp(pattern)/g")) {
>    xlog("L_ERR", "$avp(rpid) matches $avp(pattern): YES");
> } else {
>    xlog("L_ERR", "$avp(rpid) matches $avp(pattern): NO");
> }
> 
> $avp(pattern) = "+499539*"; # MATCH
> if (avp_check("$avp(rpid)", "fm/$avp(pattern)/g")) {
>    xlog("L_ERR", "$avp(rpid) matches $avp(pattern): YES");
> } else {
>    xlog("L_ERR", "$avp(rpid) matches $avp(pattern): NO");
> }
> 
> $avp(pattern) = "+499539[2-5]"; # NO MATCH
> if (avp_check("$avp(rpid)", "fm/$avp(pattern)/g")) {
>    xlog("L_ERR", "$avp(rpid) matches $avp(pattern): YES");
> } else {
>    xlog("L_ERR", "$avp(rpid) matches $avp(pattern): NO");
> }
> 
> 
> xlog("L_ERR", "======= with $$var(...)================");
> 
> $var(rpid) = "+499539110";
> 
> $var(pattern) = "+499539[2-5]"; # NO MATCH
> if (avp_check("$var(rpid)", "fm/$var(pattern)/g")) {
>    xlog("L_ERR", "$var(rpid) matches $var(pattern): YES");
> } else {
>    xlog("L_ERR", "$var(rpid) matches $var(pattern): NO");
> }
> 
> $var(pattern) = "+499539*"; # MATCH
> if (avp_check("$var(rpid)", "fm/$var(pattern)/g")) {
>    xlog("L_ERR", "$var(rpid) matches $var(pattern): YES");
> } else {
>    xlog("L_ERR", "$var(rpid) matches $var(pattern): NO");
> }
> 
> $var(pattern) = "+499539[2-5]"; # NO MATCH
> if (avp_check("$var(rpid)", "fm/$var(pattern)/g")) {
>    xlog("L_ERR", "$var(rpid) matches $var(pattern): YES");
> } else {
>    xlog("L_ERR", "$var(rpid) matches $var(pattern): NO");
> }
> 
> 
> 
> --> The result is:
> 
> 
> <script>: ======= with $avp(...)================
> <script>: +499539110 matches +499539[2-5]: NO
> <script>: +499539110 matches +499539*: YES
> <script>: +499539110 matches +499539[2-5]: YES
> <script>: ======= with $var(...)================
> <script>: +499539110 matches +499539[2-5]: NO
> <script>: +499539110 matches +499539*: YES
> <script>: +499539110 matches +499539[2-5]: NO
> 
> 
> 
> Thanks
> Klaus
> 
> 
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