1package eu.siacs.conversations.xmpp.jingle;
2
3import android.util.Log;
4
5import com.google.common.base.Function;
6import com.google.common.base.Preconditions;
7import com.google.common.base.Strings;
8import com.google.common.collect.Collections2;
9import com.google.common.collect.ImmutableMap;
10import com.google.common.collect.Iterables;
11import com.google.common.collect.Maps;
12import com.google.common.collect.Sets;
13
14import org.checkerframework.checker.nullness.compatqual.NullableDecl;
15
16import java.util.Map;
17import java.util.Set;
18
19import eu.siacs.conversations.Config;
20import eu.siacs.conversations.xmpp.jingle.stanzas.Content;
21import eu.siacs.conversations.xmpp.jingle.stanzas.GenericDescription;
22import eu.siacs.conversations.xmpp.jingle.stanzas.GenericTransportInfo;
23import eu.siacs.conversations.xmpp.jingle.stanzas.Group;
24import eu.siacs.conversations.xmpp.jingle.stanzas.IceUdpTransportInfo;
25import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
26import eu.siacs.conversations.xmpp.jingle.stanzas.RtpDescription;
27
28public class RtpContentMap {
29
30 public final Group group;
31 public final Map<String, DescriptionTransport> contents;
32
33 private RtpContentMap(Group group, Map<String, DescriptionTransport> contents) {
34 this.group = group;
35 this.contents = contents;
36 }
37
38 public static RtpContentMap of(final JinglePacket jinglePacket) {
39 return new RtpContentMap(jinglePacket.getGroup(), DescriptionTransport.of(jinglePacket.getJingleContents()));
40 }
41
42 public static RtpContentMap of(final SessionDescription sessionDescription) {
43 final ImmutableMap.Builder<String, DescriptionTransport> contentMapBuilder = new ImmutableMap.Builder<>();
44 for (SessionDescription.Media media : sessionDescription.media) {
45 final String id = Iterables.getFirst(media.attributes.get("mid"), null);
46 Preconditions.checkNotNull(id, "media has no mid");
47 contentMapBuilder.put(id, DescriptionTransport.of(sessionDescription, media));
48 }
49 final String groupAttribute = Iterables.getFirst(sessionDescription.attributes.get("group"), null);
50 final Group group = groupAttribute == null ? null : Group.ofSdpString(groupAttribute);
51 return new RtpContentMap(group, contentMapBuilder.build());
52 }
53
54 public Set<Media> getMedia() {
55 return Sets.newHashSet(Collections2.transform(contents.values(), input -> {
56 final RtpDescription rtpDescription = input == null ? null : input.description;
57 return rtpDescription == null ? Media.UNKNOWN : input.description.getMedia();
58 }));
59 }
60
61 public void requireContentDescriptions() {
62 if (this.contents.size() == 0) {
63 throw new IllegalStateException("No contents available");
64 }
65 for (Map.Entry<String, DescriptionTransport> entry : this.contents.entrySet()) {
66 if (entry.getValue().description == null) {
67 throw new IllegalStateException(String.format("%s is lacking content description", entry.getKey()));
68 }
69 }
70 }
71
72 public void requireDTLSFingerprint() {
73 if (this.contents.size() == 0) {
74 throw new IllegalStateException("No contents available");
75 }
76 for (Map.Entry<String, DescriptionTransport> entry : this.contents.entrySet()) {
77 final IceUdpTransportInfo transport = entry.getValue().transport;
78 final IceUdpTransportInfo.Fingerprint fingerprint = transport.getFingerprint();
79 if (fingerprint == null || Strings.isNullOrEmpty(fingerprint.getContent()) || Strings.isNullOrEmpty(fingerprint.getHash())) {
80 throw new SecurityException(String.format("Use of DTLS-SRTP (XEP-0320) is required for content %s", entry.getKey()));
81 }
82 }
83 }
84
85 public JinglePacket toJinglePacket(final JinglePacket.Action action, final String sessionId) {
86 final JinglePacket jinglePacket = new JinglePacket(action, sessionId);
87 if (this.group != null) {
88 jinglePacket.addGroup(this.group);
89 }
90 for (Map.Entry<String, DescriptionTransport> entry : this.contents.entrySet()) {
91 final Content content = new Content(Content.Creator.INITIATOR, entry.getKey());
92 if (entry.getValue().description != null) {
93 content.addChild(entry.getValue().description);
94 }
95 content.addChild(entry.getValue().transport);
96 jinglePacket.addJingleContent(content);
97 }
98 return jinglePacket;
99 }
100
101 public RtpContentMap transportInfo(final String contentName, final IceUdpTransportInfo.Candidate candidate) {
102 final RtpContentMap.DescriptionTransport descriptionTransport = contents.get(contentName);
103 final IceUdpTransportInfo transportInfo = descriptionTransport == null ? null : descriptionTransport.transport;
104 if (transportInfo == null) {
105 throw new IllegalArgumentException("Unable to find transport info for content name " + contentName);
106 }
107 final IceUdpTransportInfo newTransportInfo = transportInfo.cloneWrapper();
108 newTransportInfo.addChild(candidate);
109 return new RtpContentMap(null, ImmutableMap.of(contentName, new DescriptionTransport(null, newTransportInfo)));
110
111 }
112
113 public static class DescriptionTransport {
114 public final RtpDescription description;
115 public final IceUdpTransportInfo transport;
116
117 public DescriptionTransport(final RtpDescription description, final IceUdpTransportInfo transport) {
118 this.description = description;
119 this.transport = transport;
120 }
121
122 public static DescriptionTransport of(final Content content) {
123 final GenericDescription description = content.getDescription();
124 final GenericTransportInfo transportInfo = content.getTransport();
125 final RtpDescription rtpDescription;
126 final IceUdpTransportInfo iceUdpTransportInfo;
127 if (description == null) {
128 rtpDescription = null;
129 } else if (description instanceof RtpDescription) {
130 rtpDescription = (RtpDescription) description;
131 } else {
132 Log.d(Config.LOGTAG, "description was " + description);
133 //todo throw unsupported application
134 throw new IllegalArgumentException("Content does not contain RtpDescription");
135 }
136 if (transportInfo instanceof IceUdpTransportInfo) {
137 iceUdpTransportInfo = (IceUdpTransportInfo) transportInfo;
138 } else {
139 //TODO throw UNSUPPORTED_TRANSPORT exception
140 throw new IllegalArgumentException("Content does not contain ICE-UDP transport");
141 }
142 return new DescriptionTransport(rtpDescription, iceUdpTransportInfo);
143 }
144
145 public static DescriptionTransport of(final SessionDescription sessionDescription, final SessionDescription.Media media) {
146 final RtpDescription rtpDescription = RtpDescription.of(media);
147 final IceUdpTransportInfo transportInfo = IceUdpTransportInfo.of(sessionDescription, media);
148 return new DescriptionTransport(rtpDescription, transportInfo);
149 }
150
151 public static Map<String, DescriptionTransport> of(final Map<String, Content> contents) {
152 return ImmutableMap.copyOf(Maps.transformValues(contents, new Function<Content, DescriptionTransport>() {
153 @NullableDecl
154 @Override
155 public DescriptionTransport apply(@NullableDecl Content content) {
156 return content == null ? null : of(content);
157 }
158 }));
159 }
160 }
161}