ObjXMPP  Diff

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#define XMPP_CONNECTION_M

#include <assert.h>

#include <stringprep.h>
#include <idna.h>

#import <ObjOpenSSL/SSLSocket.h>

#import "XMPPConnection.h"
#import "XMPPSCRAMAuth.h"
#import "XMPPPLAINAuth.h"
#import "XMPPStanza.h"
#import "XMPPJID.h"
#import "XMPPIQ.h"
#import "XMPPMessage.h"
#import "XMPPPresence.h"
#import "XMPPRoster.h"

#import "XMPPRosterItem.h"
#import "XMPPExceptions.h"
















@implementation XMPPConnection


- init
{
	self = [super init];

	@try {
		sock = [[OFTCPSocket alloc] init];
		parser = [[OFXMLParser alloc] init];
		elementBuilder = [[OFXMLElementBuilder alloc] init];

		port = 5222;

		[parser setDelegate: self];
		[elementBuilder setDelegate: self];

		roster = [[XMPPRoster alloc] initWithConnection: self];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	OFString *old = server;
	char *srv;
	Idna_rc rc;

	if ((rc = idna_to_ascii_8z([server_ cString],
	    &srv, IDNA_USE_STD3_ASCII_RULES)) != IDNA_SUCCESS)
		@throw [XMPPIDNATranslationFailedException
		    newWithClass: isa
		      connection: self
		       operation: @"ToASCII"
			  string: server_];

	@try {
		server = [[OFString alloc] initWithCString: srv];
	} @finally {
		free(srv);
	}

-    (void)parser: (OFXMLParser*)p
  didStartElement: (OFString*)name
       withPrefix: (OFString*)prefix
	namespace: (OFString*)ns
       attributes: (OFArray*)attrs
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFEnumerator *enumerator;
	OFXMLAttribute *attr;

	if (![name isEqual: @"stream"] || ![prefix isEqual: @"stream"] ||
	    ![ns isEqual: XMPP_NS_STREAM]) {
		of_log(@"Did not get expected stream start!");
		assert(0);
	}

	enumerator = [attrs objectEnumerator];
	while ((attr = [enumerator nextObject]) != nil) {
		if ([[attr name] isEqual: @"from"] &&
		    ![[attr stringValue] isEqual: server]) {
			of_log(@"Got invalid from in stream start!");
			assert(0);
		}
	}

	[parser setDelegate: elementBuilder];

	[pool release];
}

- (void)elementBuilder: (OFXMLElementBuilder*)b
       didBuildElement: (OFXMLElement*)elem
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];

	[elem setDefaultNamespace: XMPP_NS_CLIENT];
	[elem setPrefix: @"stream"
	   forNamespace: XMPP_NS_STREAM];

	of_log(@"In:  %@", elem);

	[self XMPP_handleStanza: elem];

			   @"xmlns='" XMPP_NS_CLIENT @"' "
			   @"xmlns:stream='" XMPP_NS_STREAM @"' "
			   @"version='1.0'>", server];
}

- (void)XMPP_handleStanza: (OFXMLElement*)elem
{
	if ([[elem namespace] isEqual: XMPP_NS_CLIENT]) {
		if ([[elem name] isEqual: @"iq"]) {
			[self XMPP_handleIQ: [XMPPIQ stanzaWithElement: elem]];
			return;
		}

		if ([[elem name] isEqual: @"message"]) {
			[self XMPP_handleMessage:
			    [XMPPMessage stanzaWithElement: elem]];
			return;
		}

		if ([[elem name] isEqual: @"presence"]) {
			[self XMPP_handlePresence:
			    [XMPPPresence stanzaWithElement: elem]];
			return;
		}

		assert(0);
	}

	if ([[elem namespace] isEqual: XMPP_NS_STREAM]) {
		if ([[elem name] isEqual: @"features"]) {
			[self XMPP_handleFeatures: elem];
			return;
		}

		assert(0);
	}

	if ([[elem namespace] isEqual: XMPP_NS_STARTTLS]) {
		if ([[elem name] isEqual: @"proceed"]) {
			/* FIXME: Catch errors here */
			sock = [[SSLSocket alloc] initWithSocket: sock];

			/* Stream restart */
			[parser setDelegate: self];
			[self XMPP_startStream];
			return;
		}

		if ([[elem name] isEqual: @"failure"])
			/* TODO: Find/create an exception to throw here */
			@throw [OFException newWithClass: isa];

		assert(0);
	}

	if ([[elem namespace] isEqual: XMPP_NS_SASL]) {
		if ([[elem name] isEqual: @"challenge"]) {
			OFXMLElement *responseTag;
			OFDataArray *challenge =
			    [OFDataArray dataArrayWithBase64EncodedString:
			    [[[elem children] firstObject] stringValue]];
			OFDataArray *response = [authModule
			    calculateResponseWithChallenge: challenge];

			responseTag = [OFXMLElement
			    elementWithName: @"response"
				  namespace: XMPP_NS_SASL];
			[responseTag addChild:
			    [OFXMLElement elementWithCharacters:
			    [response stringByBase64Encoding]]];

			[self sendStanza: responseTag];
			return;
		}

		if ([[elem name] isEqual: @"success"]) {
			[authModule parseServerFinalMessage:
			    [OFDataArray dataArrayWithBase64EncodedString:
				[[[elem children] firstObject] stringValue]]];

			if ([delegate respondsToSelector:
			    @selector(connectionWasAuthenticated:)])
				[delegate connectionWasAuthenticated: self];

			/* Stream restart */
			[parser setDelegate: self];
			[self XMPP_startStream];
			return;
		}

		if ([[elem name] isEqual: @"failure"]) {
			of_log(@"Auth failed!");
			// FIXME: Do more parsing/handling
			@throw [XMPPAuthFailedException
			    newWithClass: isa
			      connection: self
				  reason: [elem stringValue]];
		}

		assert(0);
	}

	assert(0);
}

- (void)XMPP_handleIQ: (XMPPIQ*)iq
{
	BOOL handled = NO;

	if ([[iq ID] isEqual: bindID]) {
		[self XMPP_handleResourceBind: iq];
		return;
	}

	if ([[iq ID] isEqual: sessionID]) {
		[self XMPP_handleSession: iq];
		return;
	}

	if ([[iq ID] isEqual: rosterID]) {
		[self XMPP_handleRoster: iq];
		return;
	}

	if ([delegate respondsToSelector: @selector(connection:didReceiveIQ:)])
		handled = [delegate connection: self
				  didReceiveIQ: iq];

	if (!handled) {
		XMPPJID *from = [iq from];
		XMPPJID *to = [iq to];
		OFXMLElement *error;

		[iq setType: @"error"];
		[iq setTo: from];
		[iq setFrom: to];


		error = [OFXMLElement elementWithName: @"error"];
		[error addAttributeWithName: @"type"
				stringValue: @"cancel"];
		[error addChild:
		    [OFXMLElement elementWithName: @"service-unavailable"
					namespace: XMPP_NS_STANZAS]];

		[delegate connection: self
		  didReceivePresence: pres];
}

- (void)XMPP_handleFeatures: (OFXMLElement*)elem
{
	OFXMLElement *starttls =
	    [[elem elementsForName: @"starttls"
			 namespace: XMPP_NS_STARTTLS] firstObject];
	OFXMLElement *bind = [[elem elementsForName: @"bind"
					  namespace: XMPP_NS_BIND] firstObject];
	OFXMLElement *session =
	    [[elem elementsForName: @"session"
			 namespace: XMPP_NS_SESSION] firstObject];
	OFArray *mechs = [elem elementsForName: @"mechanisms"
				     namespace: XMPP_NS_SASL];
	OFMutableArray *mechanisms = [OFMutableArray array];

	if (starttls != nil) {
		[self sendStanza:
		    [OFXMLElement elementWithName: @"starttls"
					namespace: XMPP_NS_STARTTLS]];
		return;
	}

	if ([mechs count] > 0) {
		OFEnumerator *enumerator;
		OFXMLElement *mech;

		enumerator = [[[mechs firstObject] children] objectEnumerator];
		while ((mech = [enumerator nextObject]) != nil)
			[mechanisms addObject:
			    [[[mech children] firstObject] stringValue]];

		if ([mechanisms containsObject: @"SCRAM-SHA-1"]) {
			authModule = [[XMPPSCRAMAuth alloc]
			    initWithAuthcid: username
				   password: password
				       hash: [OFSHA1Hash class]];
			[self XMPP_sendAuth: @"SCRAM-SHA-1"];

}

- (void)XMPP_handleResourceBind: (XMPPIQ*)iq
{
	OFXMLElement *bindElem;
	OFXMLElement *jidElem;

	if (![[iq type] isEqual: @"result"])
		assert(0);

	bindElem = [[iq children] firstObject];

	if (![[bindElem name] isEqual: @"bind"] ||
	    ![[bindElem namespace] isEqual: XMPP_NS_BIND])
		assert(0);

	jidElem = [[bindElem children] firstObject];
	JID = [[XMPPJID alloc] initWithString:
	    [[[jidElem children] firstObject] stringValue]];

	[bindID release];
	bindID = nil;

	if (needsSession) {
		[self XMPP_sendSession];
		return;

	[iq addChild: [OFXMLElement elementWithName: @"session"
					  namespace: XMPP_NS_SESSION]];
	[self sendStanza: iq];
}

- (void)XMPP_handleSession: (XMPPIQ*)iq
{
	if (![[iq type] isEqual: @"result"])
		assert(0);

	if ([delegate respondsToSelector: @selector(connection:wasBoundToJID:)])
		[delegate connection: self
		       wasBoundToJID: JID];

	[sessionID release];

					  namespace: XMPP_NS_ROSTER]];
	[self sendStanza: iq];
}

- (void)XMPP_handleRoster: (XMPPIQ*)iq
{
	OFXMLElement *rosterElem;
	OFEnumerator *enumerator;
	OFXMLElement *elem;

	if (![[iq type] isEqual: @"result"])
		assert(0);

	rosterElem = [[iq children] firstObject];

	if (![[rosterElem name] isEqual: @"query"] ||
	    ![[rosterElem namespace] isEqual: XMPP_NS_ROSTER])
		assert(0);

	enumerator = [[rosterElem children] objectEnumerator];
	while ((elem = [enumerator nextObject]) != nil) {
		XMPPRosterItem *rosterItem;
		OFMutableArray *groups = [OFMutableArray array];
		OFEnumerator *groupEnumerator;
		OFXMLElement *groupElem;

		if (![[elem name] isEqual: @"item"] ||
		    ![[elem namespace] isEqual: XMPP_NS_ROSTER])
			continue;

		rosterItem = [XMPPRosterItem rosterItem];
		[rosterItem setJID: [XMPPJID JIDWithString:
		    [[elem attributeForName: @"jid"] stringValue]]];
		[rosterItem setName:
		    [[elem attributeForName: @"name"] stringValue]];
		[rosterItem setSubscription:
		    [[elem attributeForName: @"subscription"] stringValue]];

		groupEnumerator =
		    [[elem elementsForName: @"group"
				 namespace: XMPP_NS_ROSTER] objectEnumerator];
		while ((groupElem = [groupEnumerator nextObject]) != nil)
			[groups addObject:
			    [[[groupElem children] firstObject] stringValue]];

		if ([groups count] > 0)
			[rosterItem setGroups: groups];

		[roster XMPP_addRosterItem: rosterItem];
	}

	if ([delegate respondsToSelector:
	    @selector(connectionDidReceiveRoster:)])
		[delegate connectionDidReceiveRoster: self];

	[rosterID release];
	rosterID = nil;
}

- (XMPPJID*)JID
{
	return [[JID copy] autorelease];
}

- (void)setPort: (uint16_t)port_
{
	port = port_;
}

- (uint16_t)port
{
	return port;
}

- (void)setDelegate: (id <XMPPConnectionDelegate>)delegate_
{
	id old = delegate;
	delegate = [(id)delegate_ retain];
	[old release];
}

- (id <XMPPConnectionDelegate>)delegate
{
	return [[delegate retain] autorelease];
}

- (XMPPRoster*)roster
{
	return [[roster retain] autorelease];
}
@end

@implementation OFObject (XMPPConnectionDelegate)
- (void)connectionWasAuthenticated: (XMPPConnection*)conn
{
}

- (void)connection: (XMPPConnection*)conn
     wasBoundToJID: (XMPPJID*)jid
{
}

- (void)connectionDidReceiveRoster: (XMPPConnection*)conn
{
}

- (BOOL)connection: (XMPPConnection*)conn
      didReceiveIQ: (XMPPIQ*)iq
{
	return NO;
}

-   (void)connection: (XMPPConnection*)conn
  didReceivePresence: (XMPPPresence*)pres
{
}

-  (void)connection: (XMPPConnection*)conn
  didReceiveMessage: (XMPPMessage*)msg
{
}

- (void)connectionWasClosed: (XMPPConnection*)conn
{
}
@end