1package eu.siacs.conversations.xmpp.jingle.stanzas;
  2
  3import android.util.Log;
  4
  5import com.google.common.base.Preconditions;
  6import com.google.common.base.Strings;
  7import com.google.common.collect.ImmutableList;
  8
  9import eu.siacs.conversations.Config;
 10import eu.siacs.conversations.xml.Element;
 11import eu.siacs.conversations.xml.Namespace;
 12import eu.siacs.conversations.xmpp.jingle.transports.SocksByteStreamsTransport;
 13
 14import java.util.Collection;
 15import java.util.List;
 16
 17public class SocksByteStreamsTransportInfo extends GenericTransportInfo {
 18
 19    private SocksByteStreamsTransportInfo() {
 20        super("transport", Namespace.JINGLE_TRANSPORTS_S5B);
 21    }
 22
 23    public String getTransportId() {
 24        return this.getAttribute("sid");
 25    }
 26
 27    public SocksByteStreamsTransportInfo(
 28            final String transportId,
 29            final Collection<SocksByteStreamsTransport.Candidate> candidates) {
 30        super("transport", Namespace.JINGLE_TRANSPORTS_S5B);
 31        Preconditions.checkNotNull(transportId, "transport id must not be null");
 32        for (SocksByteStreamsTransport.Candidate candidate : candidates) {
 33            this.addChild(candidate.asElement());
 34        }
 35        this.setAttribute("sid", transportId);
 36    }
 37
 38    public TransportInfo getTransportInfo() {
 39        if (hasChild("proxy-error")) {
 40            return new ProxyError();
 41        } else if (hasChild("candidate-error")) {
 42            return new CandidateError();
 43        } else if (hasChild("candidate-used")) {
 44            final Element candidateUsed = findChild("candidate-used");
 45            final String cid = candidateUsed == null ? null : candidateUsed.getAttribute("cid");
 46            if (Strings.isNullOrEmpty(cid)) {
 47                return null;
 48            } else {
 49                return new CandidateUsed(cid);
 50            }
 51        } else if (hasChild("activated")) {
 52            final Element activated = findChild("activated");
 53            final String cid = activated == null ? null : activated.getAttribute("cid");
 54            if (Strings.isNullOrEmpty(cid)) {
 55                return null;
 56            } else {
 57                return new Activated(cid);
 58            }
 59        } else {
 60            return null;
 61        }
 62    }
 63
 64    public List<SocksByteStreamsTransport.Candidate> getCandidates() {
 65        final ImmutableList.Builder<SocksByteStreamsTransport.Candidate> candidateBuilder =
 66                new ImmutableList.Builder<>();
 67        for (final Element child : getChildren()) {
 68            if ("candidate".equals(child.getName())
 69                    && Namespace.JINGLE_TRANSPORTS_S5B.equals(child.getNamespace())) {
 70                try {
 71                    candidateBuilder.add(SocksByteStreamsTransport.Candidate.of(child));
 72                } catch (final Exception e) {
 73                    Log.d(Config.LOGTAG, "skip over broken candidate", e);
 74                }
 75            }
 76        }
 77        return candidateBuilder.build();
 78    }
 79
 80    public static SocksByteStreamsTransportInfo upgrade(final Element element) {
 81        Preconditions.checkArgument(
 82                "transport".equals(element.getName()), "Name of provided element is not transport");
 83        Preconditions.checkArgument(
 84                Namespace.JINGLE_TRANSPORTS_S5B.equals(element.getNamespace()),
 85                "Element does not match s5b transport namespace");
 86        final SocksByteStreamsTransportInfo transportInfo = new SocksByteStreamsTransportInfo();
 87        transportInfo.setAttributes(element.getAttributes());
 88        transportInfo.setChildren(element.getChildren());
 89        return transportInfo;
 90    }
 91
 92    public String getDestinationAddress() {
 93        return this.getAttribute("dstaddr");
 94    }
 95
 96    public abstract static class TransportInfo {}
 97
 98    public static class CandidateUsed extends TransportInfo {
 99        public final String cid;
100
101        public CandidateUsed(String cid) {
102            this.cid = cid;
103        }
104    }
105
106    public static class Activated extends TransportInfo {
107        public final String cid;
108
109        public Activated(final String cid) {
110            this.cid = cid;
111        }
112    }
113
114    public static class CandidateError extends TransportInfo {}
115
116    public static class ProxyError extends TransportInfo {}
117}