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.Reason;
27import eu.siacs.conversations.xmpp.jingle.stanzas.RtpDescription;
28
29public class RtpContentMap {
30
31 public final Group group;
32 public final Map<String, DescriptionTransport> contents;
33
34 private RtpContentMap(Group group, Map<String, DescriptionTransport> contents) {
35 this.group = group;
36 this.contents = contents;
37 }
38
39 public static RtpContentMap of(final JinglePacket jinglePacket) {
40 return new RtpContentMap(jinglePacket.getGroup(), DescriptionTransport.of(jinglePacket.getJingleContents()));
41 }
42
43 public static RtpContentMap of(final SessionDescription sessionDescription) {
44 final ImmutableMap.Builder<String, DescriptionTransport> contentMapBuilder = new ImmutableMap.Builder<>();
45 for (SessionDescription.Media media : sessionDescription.media) {
46 final String id = Iterables.getFirst(media.attributes.get("mid"), null);
47 Preconditions.checkNotNull(id, "media has no mid");
48 contentMapBuilder.put(id, DescriptionTransport.of(sessionDescription, media));
49 }
50 final String groupAttribute = Iterables.getFirst(sessionDescription.attributes.get("group"), null);
51 final Group group = groupAttribute == null ? null : Group.ofSdpString(groupAttribute);
52 return new RtpContentMap(group, contentMapBuilder.build());
53 }
54
55 public Set<Media> getMedia() {
56 return Sets.newHashSet(Collections2.transform(contents.values(), input -> {
57 final RtpDescription rtpDescription = input == null ? null : input.description;
58 return rtpDescription == null ? Media.UNKNOWN : input.description.getMedia();
59 }));
60 }
61
62 public void requireContentDescriptions() {
63 if (this.contents.size() == 0) {
64 throw new IllegalStateException("No contents available");
65 }
66 for (Map.Entry<String, DescriptionTransport> entry : this.contents.entrySet()) {
67 if (entry.getValue().description == null) {
68 throw new IllegalStateException(String.format("%s is lacking content description", entry.getKey()));
69 }
70 }
71 }
72
73 public void requireDTLSFingerprint() {
74 if (this.contents.size() == 0) {
75 throw new IllegalStateException("No contents available");
76 }
77 for (Map.Entry<String, DescriptionTransport> entry : this.contents.entrySet()) {
78 final IceUdpTransportInfo transport = entry.getValue().transport;
79 final IceUdpTransportInfo.Fingerprint fingerprint = transport.getFingerprint();
80 if (fingerprint == null || Strings.isNullOrEmpty(fingerprint.getContent()) || Strings.isNullOrEmpty(fingerprint.getHash())) {
81 throw new SecurityException(String.format("Use of DTLS-SRTP (XEP-0320) is required for content %s", entry.getKey()));
82 }
83 }
84 }
85
86 public JinglePacket toJinglePacket(final JinglePacket.Action action, final String sessionId) {
87 final JinglePacket jinglePacket = new JinglePacket(action, sessionId);
88 if (this.group != null) {
89 jinglePacket.addGroup(this.group);
90 }
91 for (Map.Entry<String, DescriptionTransport> entry : this.contents.entrySet()) {
92 final Content content = new Content(Content.Creator.INITIATOR, entry.getKey());
93 if (entry.getValue().description != null) {
94 content.addChild(entry.getValue().description);
95 }
96 content.addChild(entry.getValue().transport);
97 jinglePacket.addJingleContent(content);
98 }
99 return jinglePacket;
100 }
101
102 public RtpContentMap transportInfo(final String contentName, final IceUdpTransportInfo.Candidate candidate) {
103 final RtpContentMap.DescriptionTransport descriptionTransport = contents.get(contentName);
104 final IceUdpTransportInfo transportInfo = descriptionTransport == null ? null : descriptionTransport.transport;
105 if (transportInfo == null) {
106 throw new IllegalArgumentException("Unable to find transport info for content name " + contentName);
107 }
108 final IceUdpTransportInfo newTransportInfo = transportInfo.cloneWrapper();
109 newTransportInfo.addChild(candidate);
110 return new RtpContentMap(null, ImmutableMap.of(contentName, new DescriptionTransport(null, newTransportInfo)));
111
112 }
113
114 public static class DescriptionTransport {
115 public final RtpDescription description;
116 public final IceUdpTransportInfo transport;
117
118 public DescriptionTransport(final RtpDescription description, final IceUdpTransportInfo transport) {
119 this.description = description;
120 this.transport = transport;
121 }
122
123 public static DescriptionTransport of(final Content content) {
124 final GenericDescription description = content.getDescription();
125 final GenericTransportInfo transportInfo = content.getTransport();
126 final RtpDescription rtpDescription;
127 final IceUdpTransportInfo iceUdpTransportInfo;
128 if (description == null) {
129 rtpDescription = null;
130 } else if (description instanceof RtpDescription) {
131 rtpDescription = (RtpDescription) description;
132 } else {
133 Log.d(Config.LOGTAG, "description was " + description);
134 throw new UnsupportedApplicationException("Content does not contain rtp description");
135 }
136 if (transportInfo instanceof IceUdpTransportInfo) {
137 iceUdpTransportInfo = (IceUdpTransportInfo) transportInfo;
138 } else {
139 throw new UnsupportedTransportException("Content does not contain ICE-UDP transport");
140 }
141 return new DescriptionTransport(rtpDescription, iceUdpTransportInfo);
142 }
143
144 public static DescriptionTransport of(final SessionDescription sessionDescription, final SessionDescription.Media media) {
145 final RtpDescription rtpDescription = RtpDescription.of(media);
146 final IceUdpTransportInfo transportInfo = IceUdpTransportInfo.of(sessionDescription, media);
147 return new DescriptionTransport(rtpDescription, transportInfo);
148 }
149
150 public static Map<String, DescriptionTransport> of(final Map<String, Content> contents) {
151 return ImmutableMap.copyOf(Maps.transformValues(contents, new Function<Content, DescriptionTransport>() {
152 @NullableDecl
153 @Override
154 public DescriptionTransport apply(@NullableDecl Content content) {
155 return content == null ? null : of(content);
156 }
157 }));
158 }
159 }
160
161 public static class UnsupportedApplicationException extends IllegalArgumentException {
162 UnsupportedApplicationException(String message) {
163 super(message);
164 }
165 }
166
167 public static class UnsupportedTransportException extends IllegalArgumentException {
168 UnsupportedTransportException(String message) {
169 super(message);
170 }
171 }
172}