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/*
* @author STF 346
* @version $Id$
* @desc This module provides the types used by the test component
* for SIP-IMS tests.
*/
module LibSip_Steps
{
//LibCommon
import from LibCommon_Sync all ;
import from LibCommon_VerdictControl all ;
//LibSip
import from LibSip_SIPTypesAndValues all;
import from LibSip_SDPTypes all;
import from LibSip_Templates all;
import from LibSip_Interface all;
import from LibSip_PIXITS all;
import from LibSip_XMLTypes all;
group externalfunctions {
//Return random charstring
external function fx_rndStr() return charstring;
// Return the equivalent string in lower case
external function fx_putInLowercase(charstring par_string) return charstring;
external function fx_getIpAddr(charstring host_name) return charstring;
// External function to generate a digest response.
// References:
// * RFC 2617 HTTP Authentication: Basic and Digest Access
// Authentication, and
// * RFC 1321 The MD5 Message-Digest Algorithm
// See RFC 2617, chapter 5 Sample implementation, for example usage, as
// the signature of calculateDigestResponse is according to the example
// given in the RFC.
//
external function fx_calculateDigestResponse(
charstring nonce,
charstring cnonce,
charstring user,
charstring realm,
charstring passwd,
charstring alg,
charstring nonceCount,
charstring method,
charstring qop,
charstring URI,
charstring HEntity) return charstring;
}
group ParameterOperations {
/**
*
* @desc function to generate a 32 bits random number as a charstring for tag field
* (used as e.g.: tag in from-header field, or branch parameter in via header)
* @return random value with at least 32 bits of randomness
*
*/
function f_getRndTag() return charstring
{
var charstring tag_value;
//tag_value is initialized with a random value with at least 32 bits of randomness
// 4294967296 is a 32 bits integer
tag_value := fx_rndStr()&fx_rndStr();
return(tag_value);
}
/**
*
* @desc Function to prepare credentials for request that has an empty
* entity body such as a REGISTER message.
* @param p_userprofile to get important parameters
* @return Credentials field
*/
function f_calculatecCredentials_empty(in SipUserProfile p_userprofile) return Credentials
{
var Credentials v_result;
var charstring v_nonce := "";
// RFC 2617 3.2.2 username:
// The name of user in the specified realm.
var charstring v_username := p_userprofile.privUsername;
var charstring v_realm := p_userprofile.registrarDomain;
var charstring v_uri := c_sipScheme & ":" & p_userprofile.registrarDomain;
var charstring v_response := "";
// Construct credentials for an Authorization field of a request.
v_result :=
{
digestResponse :=
{
{ id := "Digest username", paramValue := v_username },
{ id := "realm", paramValue := v_realm },
{ id := "uri", paramValue := v_uri },
{ id := "nonce=""""", paramValue := omit }, // already enclosed to " characters
{ id := "response=""""", paramValue := omit } // already enclosed to " characters
}
};
return v_result;
}
/**
*
* @desc Function to calculate credentials for request that has an empty
* entity body such as a REGISTER message.
* @param p_userprofile to get important parameters
* @param p_method (can be "REGISTER", "INVITE",....)
* @param p_challenge parameter from 4xx response
* @return Credentials field
* @verdict
*/
function f_calculatecCredentials(in SipUserProfile p_userprofile, in charstring p_method,
in CommaParam_List p_challenge) return Credentials
{
var Credentials v_result;
var charstring v_nonce := "";
// Use a fixed client nonce.
var charstring v_cnonce := "1317265";
// RFC 2617 3.2.2 username:
// The name of user in the specified realm.
var charstring v_username := p_userprofile.privUsername;
var charstring v_realm;
// RFC 2617 3.2.2.2 passwd:
// A known shared secret, the password of user of the specified
// username.
var charstring v_passwd := p_userprofile.passwd;
var charstring v_algorithm;
// Use a fixed nonce count.
const charstring c_nonceCount := "00000002";
var charstring v_qop := p_userprofile.qop;
var charstring v_uri := c_sipScheme & ":" & p_userprofile.registrarDomain;
// MD5 hash of empty entity body.
const charstring c_hEntity := "d41d8cd98f00b204e9800998ecf8427e";
var charstring v_response;
var charstring v_opaque;
// extract nonce, realm, algorithm, and opaque from challenge
v_nonce := f_extractParamValueFromChallenge(p_challenge, "nonce");
v_realm := f_extractParamValueFromChallenge(p_challenge, "realm");
v_algorithm := f_extractParamValueFromChallenge(p_challenge, "algorithm");
v_opaque := f_extractParamValueFromChallenge(p_challenge, "opaque");
// calculate a digest response for the Authorize header
v_response := fx_calculateDigestResponse(
v_nonce,
v_cnonce,
v_username,
v_realm,
v_passwd,
v_algorithm,
c_nonceCount,
p_method,
v_qop,
v_uri,
c_hEntity);
// Construct credentials for an Authorization field of a request.
v_result :=
{
digestResponse :=
{
{ id := "Digest username", paramValue := v_username },
{ id := "realm", paramValue := v_realm },
{ id := "nonce", paramValue := v_nonce },
{ id := "uri", paramValue := v_uri },
{ id := "response", paramValue := v_response },
{ id := "algorithm=md5", paramValue := omit }, // algorithm is not enclosed to " characters
{ id := "cnonce", paramValue := v_cnonce },
{ id := "opaque=""""", paramValue := omit }, // already enclosed to " characters
{ id := "qop="&v_qop, paramValue := omit },//qop
{ id := "nc="&c_nonceCount, paramValue := omit }//nonceCount
}
};
return v_result;
}
/**
*
* @desc Function to calculate credentials for request that has an empty
* entity body such as a REGISTER message. NO RESPONSE value to cause an error!
* @param p_userprofile to get important parameters
* @param p_method (can be "REGISTER", "INVITE",....)
* @param p_challenge parameter from 4xx response
* @return Credentials field
* @verdict
*/
function f_calculatecCredentials_wo_response(in SipUserProfile p_userprofile, in charstring p_method,
in CommaParam_List p_challenge) return Credentials
{
var Credentials v_result;
var charstring v_nonce := "";
// Use a fixed client nonce.
var charstring v_cnonce := "1317265";
// RFC 2617 3.2.2 username:
// The name of user in the specified realm.
var charstring v_username := p_userprofile.privUsername;
var charstring v_realm;
// RFC 2617 3.2.2.2 passwd:
// A known shared secret, the password of user of the specified
// username.
var charstring v_passwd := p_userprofile.passwd;
var charstring v_algorithm;
// Use a fixed nonce count.
const charstring c_nonceCount := "00000002";
var charstring v_qop := p_userprofile.qop;
var charstring v_uri := c_sipScheme & ":" & p_userprofile.registrarDomain;
// MD5 hash of empty entity body.
const charstring c_hEntity := "d41d8cd98f00b204e9800998ecf8427e";
var charstring v_response;
var charstring v_opaque;
// extract nonce, realm, algorithm, and opaque from challenge
v_nonce := f_extractParamValueFromChallenge(p_challenge, "nonce");
v_realm := f_extractParamValueFromChallenge(p_challenge, "realm");
v_algorithm := f_extractParamValueFromChallenge(p_challenge, "algorithm");
v_opaque := f_extractParamValueFromChallenge(p_challenge, "opaque");
// calculate a digest response for the Authorize header
v_response := fx_calculateDigestResponse(
v_nonce,
v_cnonce,
v_username,
v_realm,
v_passwd,
v_algorithm,
c_nonceCount,
p_method,
v_qop,
v_uri,
c_hEntity);
// Construct credentials for an Authorization field of a request.
v_result :=
{
digestResponse :=
{
{ id := "Digest username", paramValue := v_username },
{ id := "realm", paramValue := v_realm },
{ id := "nonce", paramValue := v_nonce },
{ id := "uri", paramValue := v_uri },
// { id := "response", paramValue := v_response }, // not included to cause an error
{ id := "algorithm=md5", paramValue := omit }, // algorithm is not enclosed to " characters
{ id := "cnonce", paramValue := v_cnonce },
{ id := "opaque=""""", paramValue := omit }, // already enclosed to " characters
{ id := "qop="&v_qop, paramValue := omit },//qop
{ id := "nc="&c_nonceCount, paramValue := omit }//nonceCount
}
};
return v_result;
}
/**
*
* @desc Function to calculate credentials for response 401 - WWW-Authorization
* @param p_qop of the peer UE (alternatively )
* @param p_challenge parameter from 1st REGISTER request
* @return Credentials field
* @verdict
*/
function f_calculatecChallenge_forWWWAuthorization(in charstring p_qop, in CommaParam_List p_challenge) return Challenge
{
var Challenge v_result;
var charstring v_realm;
var charstring v_qop := p_qop;
v_realm := f_extractParamValueFromChallenge(p_challenge, "realm");
// Construct credentials for an Authorization field of a request.
v_result :=
{
digestCln :=
{
{ id := "Digest realm", paramValue := v_realm },
{ id := "nonce=", paramValue := c_nonce },
{ id := "algorithm=", paramValue := c_algorithm }, // algorithm is not enclosed to " characters
{ id := "ck=", paramValue := c_ck },
{ id := "ik=", paramValue := c_ik }, // already enclosed to " characters
{ id := "qop="&v_qop, paramValue := omit }//qop
}
};
return v_result;
}
/**
*
* @desc Function to calculate credentials for request that has an empty
* entity body such as a REGISTER message and at the end put different private name
* @param p_userprofile to get important parameters
* @param p_method (can be "REGISTER", "INVITE",....)
* @param p_challenge parameter from 4xx response
* @return Credentials field
* @verdict
*/
function f_calculatecCredentialsAndChangeUserName(in SipUserProfile p_userprofile, in charstring p_method,
in CommaParam_List p_challenge) return Credentials
{
var Credentials v_result;
var charstring v_nonce := "";
// Use a fixed client nonce.
var charstring v_cnonce := "1317265";
// RFC 2617 3.2.2 username:
// The name of user in the specified realm.
var charstring v_username := p_userprofile.privUsername;
var charstring v_realm;
// RFC 2617 3.2.2.2 passwd:
// A known shared secret, the password of user of the specified
// username.
var charstring v_passwd := p_userprofile.passwd;
var charstring v_algorithm;
// Use a fixed nonce count.
const charstring c_nonceCount := "00000002";
var charstring v_qop := p_userprofile.qop;
var charstring v_uri := c_sipScheme & ":" & p_userprofile.registrarDomain;
// MD5 hash of empty entity body.
const charstring c_hEntity := "d41d8cd98f00b204e9800998ecf8427e";
var charstring v_response;
var charstring v_opaque;
// extract nonce, realm, algorithm, and opaque from challenge
v_nonce := f_extractParamValueFromChallenge(p_challenge, "nonce");
v_realm := f_extractParamValueFromChallenge(p_challenge, "realm");
v_algorithm := f_extractParamValueFromChallenge(p_challenge, "algorithm");
v_opaque := f_extractParamValueFromChallenge(p_challenge, "opaque");
// calculate a digest response for the Authorize header
v_response := fx_calculateDigestResponse(
v_nonce,
v_cnonce,
v_username,
v_realm,
v_passwd,
v_algorithm,
c_nonceCount,
p_method,
v_qop,
v_uri,
c_hEntity);
// Construct credentials for an Authorization field of a request.
v_result :=
{
digestResponse :=
{
{ id := "Digest username", paramValue := "DifferentToPrivateUser"},
{ id := "realm", paramValue := v_realm },
{ id := "nonce", paramValue := v_nonce },
{ id := "uri", paramValue := v_uri },
{ id := "response", paramValue := v_response },
{ id := "algorithm=md5", paramValue := omit }, // algorithm is not enclosed to " characters
{ id := "cnonce", paramValue := v_cnonce },
{ id := "opaque=""""", paramValue := omit }, // already enclosed to " characters
{ id := "qop="&v_qop, paramValue := omit },//qop
{ id := "nc="&c_nonceCount, paramValue := omit }//nonceCount
}
};
return v_result;
}
/**
*
* @desc Function to check if param related to id from CommanParam_List exist
* containing challenge.
* @param p_challenge parameter from 4xx response
* @param p_id name of parameter("nonce", "realm", "ck", "ik"...)
* @return parameter p_id value
*/
function f_checkParamValueFromChallengeIfPresent(in CommaParam_List p_challenge, in charstring p_id) return boolean
{
var boolean v_result := false;
var integer v_len := sizeof(p_challenge);
var charstring v_id := fx_putInLowercase(p_id);
for (var integer i := 0; i < v_len; i := i + 1)
{
if (fx_putInLowercase(p_challenge[i].id) == v_id)
{
v_result := true;
}
}
return v_result;
}
/**
*
* @desc Function to check if tag is present in SemicolonParam_List
* @param p_param_l SemicolonParam_List
* @return boolean true if tag is present
*/
function f_checkTagPresent(SemicolonParam_List p_param_l) runs on SipComponent return boolean {
var integer v_numberOfParams;
var integer i := 0;
v_numberOfParams := sizeof (p_param_l);
while (i < v_numberOfParams) {
if (fx_putInLowercase(p_param_l[i].id) == c_tagId) {
return (true);
}
i := i + 1;
}
return (false);
}
/**
*
* @desc Function to extract paramValue related to id from CommanParam_List
* containing challenge.
* @param p_challenge parameter from 4xx response
* @param p_id name of parameter("nonce", "realm",...)
* @return parameter p_id value
*/
function f_extractParamValueFromChallenge(in CommaParam_List p_challenge, in charstring p_id) return charstring
{
var charstring v_result := "";
var integer v_len := sizeof(p_challenge);
var charstring v_id := fx_putInLowercase(p_id);
for (var integer i := 0; i < v_len; i := i + 1)
{
if (fx_putInLowercase(p_challenge[i].id) == v_id)
{
v_result := p_challenge[i].paramValue;
}
}
if (v_result == "")
{
if(match(p_id,"algorithm"))
{
v_result := "MD5"
}
else if(match(p_id,"opaque"))
{
v_result := ""
}
else
{
var charstring v_tmpchar := "Cannot acquire value from credentials.";
log ("Cannot acquire value from credentials.");
setverdict(inconc);
stop;
}
}
return v_result;
}
}//end group ParameterOperations
group FieldOperations {
/**
*
* @desc function adds "Tag"-parameter in "To"-headerfield
* @param p_to To header field that should get a Tag parameter
*
*/
function f_addTagInTo(inout To p_to) runs on SipComponent
{
f_addParameterTagIfNotPresent(c_tagId, f_getRndTag(), p_to);
}
/**
*
* @desc addition of a single parameter in the via header field
* @param p_parameter_name name of parameter to be added
* @param p_parameter_value value of parameter to be added
* @param p_viaBody the via parameter to be extended
* @verdict
*/
function f_addParameterIfNotPresent(
in charstring p_parameter_name,
in charstring p_parameter_value,
inout ViaBody p_viaBody)
{
if (ispresent (p_viaBody.viaParams)) {
return;
}
p_viaBody.viaParams := {
{
p_parameter_name,
p_parameter_value
}
};
}
/**
*
* @desc function to addd a parameter to the "To" header field (if there is not any parameter)
* @param p_parameter_name name of the parameter to be added
* @param p_parameter_value value of the paramter to be added
* @param p_to "To" header field to be extended
* @verdict
*/
function f_addParameterTagIfNotPresent(
in charstring p_parameter_name,
in charstring p_parameter_value,
inout To p_to)
{
if (ispresent (p_to.toParams)) {
return;
}
p_to.toParams := {
{
p_parameter_name,
p_parameter_value
}
};
}
/**
*
* @desc function compares the IP address of two hosts
* @param p_host1 hostname
* @param p_host2 hostname
* @return boolean value that is true if the IP addresses are identical
* @verdict
*/
function f_equivalentHostAddr(in charstring p_host1, in charstring p_host2) return boolean
{
//A DNS server may be used
return(fx_getIpAddr(p_host1) == fx_getIpAddr(p_host2));
}
/**
*
* @desc function checks if Require contains Precondition
* @param p_message (request or response) SIP message to be analysed
* @return true if p_id parameter exist
*/
function f_checkRequirePrecondition(in Request p_message)
{
if (ispresent(p_message.msgHeader.require))
{
var boolean v_precondition_found:=false;
for (var integer v_i:=0; v_i<sizeof(p_message.msgHeader.require.optionsTags); v_i:=v_i+1){
if (match(p_message.msgHeader.require.optionsTags[v_i],c_tagPrecond)) {
v_precondition_found:=true;
}
}
if (not(v_precondition_found)){
setverdict(fail);
log("FAIL: precondition not found in Require options list!");
}
}
else
{
setverdict(fail);
log("FAIL: Require options is not present!");
}
}
/**
*
* @desc function checks if P-Charging-Vector contains a particular parameter
* @param p_message (request or response) SIP message to be analysed
* @param p_id name of parameter
* @return true if p_id parameter exist
*/
function f_checkPChargingVectorHeaderParamId(in Request p_message, charstring p_id) return boolean
{
var integer v_chargeParamsLen;
if (ispresent(p_message.msgHeader.pChargingVector)) {
for (var integer i:=0; i<sizeof(p_message.msgHeader.pChargingVector.chargeParams); i:=i+1)
{if(p_message.msgHeader.pChargingVector.chargeParams[i].id == p_id)
{return (true)}
};
}
return (false)
}
/**
*
* @desc function checks if P-Charging-Vector contains a particular parameter
* @param p_message (request or response) SIP message to be analysed
* @param p_id name of parameter
* @return true if p_id parameter exist
*/
function f_checkPChargingVectorHeaderParamIdResponse(in Response p_message, charstring p_id) return boolean
{
var integer v_chargeParamsLen;
if (ispresent(p_message.msgHeader.pChargingVector)) {
for (var integer i:=0; i<sizeof(p_message.msgHeader.pChargingVector.chargeParams); i:=i+1)
{if(p_message.msgHeader.pChargingVector.chargeParams[i].id == p_id)
{return (true)}
};
}
return (false)
}
/**
*
* @desc function returns the Host/Port of a given Contact header field
* @param p_contact contact header field to be analysed
* @return Host/Port record from the contact header field
*/
function f_getContactAddr(in ContactAddress p_contact) runs on SipComponent return HostPort
{
var HostPort v_locAddr;
var SipUrl v_SipUrl;
if (ischosen(p_contact.addressField.nameAddr))
{
v_SipUrl := p_contact.addressField.nameAddr.addrSpec;
}
else
{
v_SipUrl := p_contact.addressField.addrSpecUnion;
}
v_locAddr.host := v_SipUrl.hostPort.host;
if (ispresent(v_SipUrl.hostPort.portField))
{
v_locAddr.portField := v_SipUrl.hostPort.portField;
}
else
{
v_locAddr.portField := c_defaultSipPort;
}
return(v_locAddr);
} // end f_getContactAddr
/**
*
* @desc function returns the Userinfo from a given To header field
* @param p_to To header field to be analysed
* @return Userinfo from the To header field as a charstring
*/
function f_getUserfromTo(in To p_to) runs on SipComponent return charstring
{
var SipUrl v_SipUrl;
if (ischosen(p_to.addressField.nameAddr))
{
v_SipUrl := p_to.addressField.nameAddr.addrSpec;
}
else
{
v_SipUrl := p_to.addressField.addrSpecUnion;
}
return(v_SipUrl.userInfo.userOrTelephoneSubscriber);
} // end f_getUserfromTo
/**
*
* @desc function to generate a 32 bits random number as a charstring for tag field
* @param p_cSeq_s CSeq parameter used to modify the tag field value
* @return tag value
*/
function f_getRndCallId(inout CSeq p_cSeq_s) return charstring
{
var charstring v_tag_value;
v_tag_value := fx_rndStr()&fx_rndStr();
//v_tag_value is initialized with a random value with at least 32 bits of randomness
// 4294967296 is a 32 bits integer
//v_tag_value := int2str(float2int(4294967296.0*rnd()) + loc_CSeq_s.seqNumber );
return(v_tag_value);
}
/**
*
* @desc function give access to the top element of the Path header field.
* @param p_Request SIP message to be analysed
* @return NameAddr (e.g. <sip:p.home.com>) or omit
*/
function f_getPathHeaderTop(inout Request p_Request) return NameAddr
{
if (ispresent(p_Request.msgHeader.path)) {
if (sizeof(p_Request.msgHeader.path.pathValues)>0) {
return(p_Request.msgHeader.path.pathValues[0].nameAddr)}
};
return(omit)
}
/**
*
* @desc function updates first element of a Via headerfield list
* @param p_viaBody_List address list of a Via header field
* @param p_source_address address to be inserted in the top element
*/
function f_getViaReplyAddr(inout ViaBody_List p_viaBody_List, inout address4SIP p_source_address)
runs on SipComponent
{
var ViaBody v_viaBody;
var HostPort v_locAddr;
// The address to send message shall be updated after getting information
// in the Via header fied and according to 18.2.2
v_viaBody := p_viaBody_List[0];
// received parameter has to be addded to the via hader field
// Be careful it could be an Host name and not an IP Address
if (not f_equivalentHostAddr(valueof (v_viaBody.sentBy.host),
valueof (p_source_address.host))) {
f_addParameterIfNotPresent(
c_receivedId,
valueof (p_source_address.host),
v_viaBody);
}
if (ispresent(v_viaBody.sentBy.portField))
{
p_source_address.portField := valueof(v_viaBody.sentBy.portField);
}
else
{
p_source_address.portField := c_defaultSipPort;
}
}
/**
*
* @desc functions give access to an element of the Route header field (record).
* @param p_message (request) SIP message to be analysed
* @param p_index index of Route record element to be retrieved
* @return HostPort value of the Route element or omit
*/
function f_getRouteHeaderElementAddressFromRequest(in Request p_message, in integer p_index) return HostPort
{
if (ispresent(p_message.msgHeader.route)) {
if (sizeof(p_message.msgHeader.route.routeBody)>p_index) {
return(p_message.msgHeader.route.routeBody[p_index].nameAddr.addrSpec.hostPort)}
};
setverdict(fail);
return(c_hostport_dummy)
}
/**
*
* @desc functions give access to an element of the Record-Route header field (record).
* @param p_message (request) SIP message to be analysed
* @param p_index index of recordRoute record element to be retrieved
* @return HostPort value of the Record-Route element or omit
*/
function f_getRecordRouteHeaderElementAddressFromRequest(in Request p_message, in integer p_index) return HostPort
{
if (ispresent(p_message.msgHeader.recordRoute)) {
if (sizeof(p_message.msgHeader.recordRoute.routeBody)>p_index) {
return(p_message.msgHeader.recordRoute.routeBody[p_index].nameAddr.addrSpec.hostPort)}
};
setverdict(fail);
return(c_hostport_dummy)
}
/**
*
* @desc functions give access to an element of the Record-Route header field (record).
* @param p_message (response) SIP message to be analysed
* @param p_index index of recordRoute record element to be retrieved
* @return HostPort value of the Record-Route element or omit
*/
function f_getRecordRouteHeaderElementAddressFromResponse(in Response p_message, in integer p_index) return HostPort
{
if (ispresent(p_message.msgHeader.recordRoute)) {
if (sizeof(p_message.msgHeader.recordRoute.routeBody)>p_index) {
return(p_message.msgHeader.recordRoute.routeBody[p_index].nameAddr.addrSpec.hostPort)}
};
setverdict(fail);
return(c_hostport_dummy)
}
/**
*
* @desc functions give access to an element of the Via header field (record).
* @param p_message (request) SIP message to be analysed
* @param p_index index of via record element to be retrieved
* @return HostPort value of the Via element or omit
*/
function f_getViaHeaderElementHostPort(in Request p_message, in integer p_index) return HostPort
{
if (sizeof(p_message.msgHeader.via.viaBody)>p_index) {
return(p_message.msgHeader.via.viaBody[p_index].sentBy)}
setverdict(fail);
return(c_hostport_dummy)
}
/**
*
* @desc functions give access to an element of the Via header field (record).
* @param p_message (response) SIP message to be analysed
* @param p_index index of via record element to be retrieved
* @return HostPort value of the Via element or omit
*/ function f_getViaHeaderElementHostPortResponse(in Response p_message, in integer p_index) return HostPort
{
if (sizeof(p_message.msgHeader.via.viaBody)>p_index) {
return(p_message.msgHeader.via.viaBody[p_index].sentBy)}
setverdict(fail);
return(c_hostport_dummy)
}
/**
*
* @desc function checks indicators if topology hiding (TH) has been applied:
* - second element in via-header record has tokenized-by parameter
* @param p_Request SIP message to be analysed
* @return boolean value (true indicate TH, false otherwise)
*/
function f_topologyHiding(inout Request p_request) runs on SipComponent return boolean
{
var GenericParam v_viaParameter := p_request.msgHeader.via.viaBody[1].viaParams[0]; // second element
if (not v_viaParameter.id == "tokenized-by")
{return(false)};
return(true)
}
/**
*
* @desc function checks indicators if topology hiding (TH) has been applied:
* - any element in via-header record has tokenized-by parameter
* @param Response SIP message to be analysed
* @return boolean value (true indicate TH, false otherwise)
*/
function f_topologyHidingResponse(inout Response p_response) runs on SipComponent return boolean
{
var GenericParam v_viaParameter;
for (var integer v_i := 0; v_i < sizeof(p_response.msgHeader.via.viaBody); v_i := v_i + 1) {
v_viaParameter := p_response.msgHeader.via.viaBody[v_i].viaParams[0]; // first parameter
if (not v_viaParameter.id == "tokenized-by")
{return(false)}
}
return(true);
}
group SetHeaders {
/**
*
* @desc function for setting of component variables related to message header fields
* (message type independent: CSeq, contact, via), function uses information from userprofile
*
* @param p_cSeq_s CSeq parameter
* @param p_method method name for cSeq header field
*/
function f_setHeadersGeneral(inout CSeq p_cSeq_s, in charstring p_method) runs on SipComponent
{
var SemicolonParam_List v_params;
p_cSeq_s.fieldName := CSEQ_E;
p_cSeq_s.seqNumber := p_cSeq_s.seqNumber + 1;
p_cSeq_s.method := p_method ;
vc_cSeq := p_cSeq_s;
vc_contact := valueof(m_Contact(m_SipUrl_contactIpaddr(vc_userprofile)));
vc_branch := c_brenchCookie & f_getRndTag();
vc_via:={
fieldName := VIA_E,
viaBody := {valueof(m_ViaBody_currIpaddr(vc_branch, vc_userprofile))}
};
}// end function f_setHeadersGeneral
/**
*
* @desc setting of general and basic Bye header fields
* in additon to the addresses (To, From, ReqUri)
* @param p_cSeq_s
*/
function f_setHeadersBYE(inout CSeq p_cSeq_s) runs on SipComponent
{
f_setHeadersGeneral(p_cSeq_s, "BYE"); // cseq, contact, branch, via
vc_callId := { fieldName:=CALL_ID_E, callid:=f_getRndCallId(p_cSeq_s) & c_AT & vc_userprofile.currIpaddr };
f_addTagInTo(vc_to);
vc_cancel_To := vc_to;
vc_caller_To := vc_to;
vc_caller_From := vc_from;
vc_reqHostPort := vc_requestUri.hostPort;
}// end function f_setHeadersBYE
/**
*
* @desc function sets header field for the next outgoing REGISTER message
* @param p_cSeq_s CSeq parameter to be applied
*/
function f_setHeaders_REGISTER(inout CSeq p_cSeq_s) runs on SipComponent
{
var SemicolonParam_List v_params;
f_setHeadersGeneral(p_cSeq_s, "REGISTER"); // cseq, contact, branch, via
vc_requestUri:=
{
scheme := c_sipScheme,
userInfo := omit,
hostPort := {host:=vc_userprofile.registrarDomain, portField:=omit},
urlParameters := omit,
headers := omit
};
vc_reqHostPort := vc_requestUri.hostPort;
vc_callId := { fieldName:=CALL_ID_E, callid:=f_getRndCallId(p_cSeq_s) & c_AT & vc_userprofile.currIpaddr };
vc_callIdReg := vc_callId;
vc_to := valueof(m_To(m_SipUrl_currDomain(vc_userprofile)));
v_params := {{id:=c_tagId, paramValue:=f_getRndTag()}}
vc_from := {fieldName := FROM_E,
addressField :=vc_to.addressField,
fromParams := v_params
};
if(not vc_firstREGISTER_sent)
{
v_params := {{id:=c_expiresId, paramValue:=c_shortRegistration}};
vc_contact.contactBody.contactAddresses[0].contactParams := v_params;
}
vc_firstREGISTER_sent := true;//f_setHeaders_Register is called in deREGISTER function
vc_authorization :=
{
fieldName := AUTHORIZATION_E,
body := f_calculatecCredentials_empty(vc_userprofile)
}
}// end function setHeaders_REGISTER
/**
*
* @desc function sets via, cseq and authorization header for the next outgoing (protected) REGISTER
* @verdict
*/