AuthPlugin::AuthResult CallerAlias::authorizeAndModify(const UtlString& id, /**< The authenticated identity of the * request originator, if any (the null * string if not). * This is in the form of a SIP uri * identity value as used in the * credentials database (user@domain) * without the scheme or any parameters. */ const Url& requestUri, ///< parsed target Uri RouteState& routeState, ///< the state for this request. const UtlString& method,///< the request method AuthResult priorResult,///< results from earlier plugins. SipMessage& request, ///< see AuthPlugin regarding modifying bool bSpiralingRequest, ///< spiraling indication UtlString& reason ///< rejection reason ) { // get the call-id to use in logging UtlString callId; request.getCallIdField(&callId); if ( (priorResult != DENY) // no point in modifying a request that won't be sent ) { UtlString callerFrom; UtlString callerFromTagOffsetStr; UtlString aliasFrom; UtlString aliasFromTagOffsetStr; UtlString originalFromTag; if ( !routeState.getParameter(mInstanceName.data(), CALLER_FROM_PARAM, callerFrom) || !routeState.getParameter(mInstanceName.data(), CALLER_TAG_OFFSET_PARAM, callerFromTagOffsetStr) || !routeState.getParameter(mInstanceName.data(), ALIAS_FROM_PARAM, aliasFrom) || !routeState.getParameter(mInstanceName.data(), ALIAS_TAG_OFFSET_PARAM, aliasFromTagOffsetStr) || !routeState.originalCallerFromTagValue(mInstanceName.data(), originalFromTag) ) { if ( routeState.isMutable() && routeState.directionIsCallerToCalled(mInstanceName.data()) ) // a new dialog? { /* * Get the callers identity by getting the caller URI and: * remove all parameters * remove the scheme name */ UtlString callerIdentity; UtlString originalFromField; request.getFromField(&originalFromField); Url originalFromUrl(originalFromField); /* * Extract the from identity as a key for the caller alias table * Start with the From header field (someday we should use the Identity if present) */ Url fromUrl(originalFromUrl); fromUrl.removeParameters(); // parameters are not relevant for this Url::Scheme fromUrlScheme = fromUrl.getScheme(); switch (fromUrlScheme) { case Url::SipsUrlScheme: // sips and sip are equivalent for identity purposes, // so just set to sip fromUrl.setScheme(Url::SipUrlScheme); // and fall through to extract the identity... case Url::SipUrlScheme: // case Url::TelUrlScheme: will go here, since 'tel' and 'sip' are the same length fromUrl.getUri(callerIdentity); callerIdentity.remove(0,4 /* strlen("sip:") */); // strip off the scheme name break; default: // for all other schemes, treat identity as null Os::Logger::instance().log(FAC_SIP, PRI_WARNING, "CallerAlias[%s]::check4andApplyAlias From uses unsupported scheme '%s'" " - using null identity", mInstanceName.data(), Url::schemeName(fromUrlScheme) ); break; } /* * Determine whether the identity is one for which this proxy * is authoritative; if not, we will not use wildcard matches. */ bool identityIsLocal = mpSipRouter->isLocalDomain(fromUrl); // now we have callerIdentity set; use for looking up each contact. Os::Logger::instance().log(FAC_SIP, PRI_DEBUG, "CallerAlias[%s]::check4andApplyAlias " "\n caller '%s' %s", mInstanceName.data(), callerIdentity.data(), identityIsLocal ? "is local" : "is not local" ); /* * Examine the request URI, * checking for a caller alias set for its domain(including asssociated gateway sipxecsLineid) with callerIdentity */ UtlString sipxecsLineIdField; requestUri.getUrlParameter(SIPX_SIPXECS_LINEID_URI_PARAM, sipxecsLineIdField); Os::Logger::instance().log(FAC_SIP, PRI_DEBUG, "getUrlParameter: sipxecsLineid[%s]" " in CallerAlias", sipxecsLineIdField.data() ); UtlString targetDomain; requestUri.getHostWithPort(targetDomain); if (!(sipxecsLineIdField.isNull())) { targetDomain.append(";").append(SIPX_SIPXECS_LINEID_URI_PARAM).append("=").append(sipxecsLineIdField.data()); } Os::Logger::instance().log(FAC_SIP, PRI_DEBUG, "CallerAlias::targetDomain [%s]", targetDomain.data() ); // look up any caller alias for this identity and contact domain UtlString callerAlias; if (identityIsLocal && getCallerAlias(callerIdentity, targetDomain, callerAlias) ) { // found a caller alias, so rewrite the From information /* * The From header requires special handling * - we need to preserve the tag, if any, from the original header */ originalFromUrl.getFieldParameter("tag", originalFromTag); Url newFromUrl(callerAlias.data()); newFromUrl.removeFieldParameter("tag"); // specifying a tag is a no-no if ( !originalFromTag.isNull() ) { newFromUrl.setFieldParameter("tag", originalFromTag.data()); } UtlString newFromFieldValue; newFromUrl.toString(newFromFieldValue); // log the change we are making before stripping the tag from the field values Os::Logger::instance().log( FAC_SIP, PRI_INFO, "CallerAlias[%s]::check4andApplyAlias call %s set caller alias\n" " Original-From: %s\n" " Aliased-From: %s", mInstanceName.data(), callId.data(), originalFromField.data(), newFromFieldValue.data() ); // rewrite the caller identity with the aliased value request.setRawFromField(newFromFieldValue.data()); // Factor the tag values out of the field values stored in the RouteState // We do this because otherwise we'll end up encoding and sending two copies // of the tag; since some phones send really long tag values (no one knows why), // this can cause such large Record-Route headers that they cause interop problems. if ( ! originalFromTag.isNull() ) { // find the offset of the tag value in the callers from field ssize_t callerFromTagOffset; callerFromTagOffset = originalFromField.index(originalFromTag); callerFromTagOffsetStr.appendNumber(callerFromTagOffset); // strip the tag value from the original From value to be stored in the RouteState originalFromField.replace(callerFromTagOffset, originalFromTag.length(), ""); // find the offset of the tag value in the aliased from field ssize_t aliasFromTagOffset; aliasFromTagOffset = newFromFieldValue.index(originalFromTag); aliasFromTagOffsetStr.appendNumber(aliasFromTagOffset); // strip the tag value from the aliased From value to be stored in the RouteState newFromFieldValue.replace(aliasFromTagOffset, originalFromTag.length(), ""); } // save the original and new values so that we can fix them later routeState.setParameter(mInstanceName.data(), CALLER_FROM_PARAM,originalFromField); routeState.setParameter(mInstanceName.data(), CALLER_TAG_OFFSET_PARAM,callerFromTagOffsetStr); routeState.setParameter(mInstanceName.data(), ALIAS_FROM_PARAM,newFromFieldValue); routeState.setParameter(mInstanceName.data(), ALIAS_TAG_OFFSET_PARAM,aliasFromTagOffsetStr); } else { Os::Logger::instance().log( FAC_SIP, PRI_DEBUG, "CallerAlias[%s]::check4andApplyAlias call %s found no alias", mInstanceName.data(), callId.data() ); } } else { Os::Logger::instance().log(FAC_SIP, PRI_DEBUG, "CallerAlias[%s]::authorizeAndModify " "not mutable - no rewrite", mInstanceName.data() ); } } else // the callerFrom and aliasFrom parameters were found { /* * This request has had its From rewritten, so fix either the From * or the To depending on which direction this request is going. */ if (!request.isResponse()) // can't modify responses, so don't bother { size_t tagOffset; if (routeState.directionIsCallerToCalled(mInstanceName.data())) { // replace the from tag value in the stored aliased header tagOffset = strtol(aliasFromTagOffsetStr.data(), NULL, 10); aliasFrom.insert(tagOffset, originalFromTag); // put the aliased header into the message request.setRawFromField(aliasFrom); Os::Logger::instance().log(FAC_AUTH, PRI_DEBUG, "CallerAlias[%s]::authorizeAndModify " "call %s reset From", mInstanceName.data(), callId.data() ); } else // direction is Called to Caller { // replace the from tag value in the stored original header tagOffset = strtol(callerFromTagOffsetStr.data(), NULL, 10); callerFrom.insert(tagOffset, originalFromTag); request.setRawToField(callerFrom.data()); Os::Logger::instance().log(FAC_AUTH, PRI_DEBUG, "CallerAlias[%s]::authorizeAndModify " "call %s reset To", mInstanceName.data(), callId.data() ); } } } } return AuthPlugin::CONTINUE; }
bool CallTracker::getSessionContextHandle( const RouteState& routeState, UtlString& handle ) const { return routeState.getParameter( mInstanceNameForRouteState.data(), SESSION_CONTEXT_ID_PARAM, handle ); }