Support for device management and contact requests.

// FREEBIE

build.gradle

@@ -1,5 +1,5 @@
 subprojects {
-    ext.version_number     = "1.6.0-RC4"
+    ext.version_number     = "1.6.0-RC19"
     ext.group_info         = "org.whispersystems"
     ext.axolotl_version    = "1.3.1"
 

java/src/main/java/org/whispersystems/textsecure/api/TextSecureAccountManager.java

@@ -26,6 +26,7 @@ import org.whispersystems.libaxolotl.ecc.ECPublicKey;
 import org.whispersystems.libaxolotl.state.PreKeyRecord;
 import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
 import org.whispersystems.libaxolotl.util.guava.Optional;
+import org.whispersystems.textsecure.api.messages.multidevice.DeviceInfo;
 import org.whispersystems.textsecure.api.push.ContactTokenDetails;
 import org.whispersystems.textsecure.api.push.SignedPreKeyEntity;
 import org.whispersystems.textsecure.api.push.TrustStore;
@@ -234,6 +235,14 @@ public class TextSecureAccountManager {
     this.pushServiceSocket.sendProvisioningMessage(deviceIdentifier, ciphertext);
   }
 
+  public List<DeviceInfo> getDevices() throws IOException {
+    return this.pushServiceSocket.getDevices();
+  }
+
+  public void removeDevice(long deviceId) throws IOException {
+    this.pushServiceSocket.removeDevice(deviceId);
+  }
+
   private String createDirectoryServerToken(String e164number, boolean urlSafe) {
     try {
       MessageDigest digest  = MessageDigest.getInstance("SHA1");

java/src/main/java/org/whispersystems/textsecure/api/TextSecureMessageSender.java

@@ -191,11 +191,12 @@ public class TextSecureMessageSender {
   }
 
   private byte[] createMultiDeviceContactsContent(TextSecureAttachmentStream contacts) throws IOException {
-    SyncMessage.Builder builder = SyncMessage.newBuilder();
+    Content.Builder     container = Content.newBuilder();
+    SyncMessage.Builder builder   = SyncMessage.newBuilder();
     builder.setContacts(SyncMessage.Contacts.newBuilder()
                                             .setBlob(createAttachmentPointer(contacts)));
 
-    return builder.build().toByteArray();
+    return container.setSyncMessage(builder).build().toByteArray();
   }
 
   private byte[] createSentTranscriptMessage(byte[] content, Optional<TextSecureAddress> recipient, long timestamp) {

java/src/main/java/org/whispersystems/textsecure/api/crypto/TextSecureCipher.java

@@ -39,6 +39,7 @@ import org.whispersystems.textsecure.api.messages.TextSecureContent;
 import org.whispersystems.textsecure.api.messages.TextSecureEnvelope;
 import org.whispersystems.textsecure.api.messages.TextSecureGroup;
 import org.whispersystems.textsecure.api.messages.TextSecureDataMessage;
+import org.whispersystems.textsecure.api.messages.multidevice.RequestMessage;
 import org.whispersystems.textsecure.api.messages.multidevice.SentTranscriptMessage;
 import org.whispersystems.textsecure.api.messages.multidevice.TextSecureSyncMessage;
 import org.whispersystems.textsecure.api.push.TextSecureAddress;
@@ -175,8 +176,12 @@ public class TextSecureCipher {
     if (content.hasSent()) {
       SyncMessage.Sent sentContent = content.getSent();
       return new TextSecureSyncMessage(new SentTranscriptMessage(sentContent.getDestination(),
-                                                                        sentContent.getTimestamp(),
-                                                                        createTextSecureMessage(envelope, sentContent.getMessage())));
+                                                                 sentContent.getTimestamp(),
+                                                                 createTextSecureMessage(envelope, sentContent.getMessage())));
+    }
+
+    if (content.hasRequest()) {
+      return new TextSecureSyncMessage(new RequestMessage(content.getRequest()));
     }
 
     return new TextSecureSyncMessage();

java/src/main/java/org/whispersystems/textsecure/api/messages/multidevice/DeviceContactsOutputStream.java

@@ -4,6 +4,7 @@ import org.whispersystems.textsecure.internal.push.TextSecureProtos;
 import org.whispersystems.textsecure.internal.util.Util;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.OutputStream;
 
 public class DeviceContactsOutputStream {
@@ -25,7 +26,16 @@ public class DeviceContactsOutputStream {
 
   private void writeAvatarImage(DeviceContact contact) throws IOException {
     if (contact.getAvatar().isPresent()) {
-      Util.copy(contact.getAvatar().get().getInputStream(), out);
+      InputStream in     = contact.getAvatar().get().getInputStream();
+      byte[]      buffer = new byte[4096];
+
+      int read;
+
+      while ((read = in.read(buffer)) != -1) {
+        out.write(buffer, 0, read);
+      }
+
+      in.close();
     }
   }
 
@@ -41,6 +51,7 @@ public class DeviceContactsOutputStream {
       TextSecureProtos.ContactDetails.Avatar.Builder avatarBuilder = TextSecureProtos.ContactDetails.Avatar.newBuilder();
       avatarBuilder.setContentType(contact.getAvatar().get().getContentType());
       avatarBuilder.setLength(contact.getAvatar().get().getLength());
+      contactDetails.setAvatar(avatarBuilder);
     }
 
     byte[] serializedContactDetails = contactDetails.build().toByteArray();

java/src/main/java/org/whispersystems/textsecure/api/messages/multidevice/DeviceInfo.java

@@ -0,0 +1,36 @@
+package org.whispersystems.textsecure.api.messages.multidevice;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class DeviceInfo {
+
+  @JsonProperty
+  private long id;
+
+  @JsonProperty
+  private String name;
+
+  @JsonProperty
+  private long created;
+
+  @JsonProperty
+  private long lastSeen;
+
+  public DeviceInfo() {}
+
+  public long getId() {
+    return id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public long getCreated() {
+    return created;
+  }
+
+  public long getLastSeen() {
+    return lastSeen;
+  }
+}

java/src/main/java/org/whispersystems/textsecure/api/messages/multidevice/RequestMessage.java

@@ -0,0 +1,16 @@
+package org.whispersystems.textsecure.api.messages.multidevice;
+
+import org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request;
+
+public class RequestMessage {
+
+  private final Request request;
+
+  public RequestMessage(Request request) {
+    this.request = request;
+  }
+
+  public boolean isContactsRequest() {
+    return request.getType() == Request.Type.CONTACTS;
+  }
+}

java/src/main/java/org/whispersystems/textsecure/api/messages/multidevice/TextSecureSyncMessage.java

@@ -9,29 +9,41 @@ public class TextSecureSyncMessage {
   private final Optional<SentTranscriptMessage> sent;
   private final Optional<TextSecureAttachment>  contacts;
   private final Optional<TextSecureGroup>       group;
+  private final Optional<RequestMessage>        request;
 
   public TextSecureSyncMessage() {
     this.sent     = Optional.absent();
     this.contacts = Optional.absent();
     this.group    = Optional.absent();
+    this.request  = Optional.absent();
   }
 
   public TextSecureSyncMessage(SentTranscriptMessage sent) {
     this.sent     = Optional.of(sent);
     this.contacts = Optional.absent();
     this.group    = Optional.absent();
+    this.request  = Optional.absent();
   }
 
   public TextSecureSyncMessage(TextSecureAttachment contacts) {
     this.contacts = Optional.of(contacts);
     this.sent     = Optional.absent();
     this.group    = Optional.absent();
+    this.request  = Optional.absent();
   }
 
   public TextSecureSyncMessage(TextSecureGroup group) {
     this.group    = Optional.of(group);
     this.sent     = Optional.absent();
     this.contacts = Optional.absent();
+    this.request  = Optional.absent();
+  }
+
+  public TextSecureSyncMessage(RequestMessage contactsRequest) {
+    this.request  = Optional.of(contactsRequest);
+    this.sent     = Optional.absent();
+    this.contacts = Optional.absent();
+    this.group    = Optional.absent();
   }
 
   public Optional<SentTranscriptMessage> getSent() {
@@ -46,4 +58,8 @@ public class TextSecureSyncMessage {
     return contacts;
   }
 
+  public Optional<RequestMessage> getRequest() {
+    return request;
+  }
+
 }

java/src/main/java/org/whispersystems/textsecure/internal/push/DeviceInfoList.java

@@ -0,0 +1,19 @@
+package org.whispersystems.textsecure.internal.push;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import org.whispersystems.textsecure.api.messages.multidevice.DeviceInfo;
+
+import java.util.List;
+
+public class DeviceInfoList {
+
+  @JsonProperty
+  private List<DeviceInfo> devices;
+
+  public DeviceInfoList() {}
+
+  public List<DeviceInfo> getDevices() {
+    return devices;
+  }
+}

java/src/main/java/org/whispersystems/textsecure/internal/push/DeviceLimit.java

@@ -0,0 +1,20 @@
+package org.whispersystems.textsecure.internal.push;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class DeviceLimit {
+
+  @JsonProperty
+  private int current;
+
+  @JsonProperty
+  private int max;
+
+  public int getCurrent() {
+    return current;
+  }
+
+  public int getMax() {
+    return max;
+  }
+}

java/src/main/java/org/whispersystems/textsecure/internal/push/DeviceLimitExceededException.java

@@ -0,0 +1,20 @@
+package org.whispersystems.textsecure.internal.push;
+
+import org.whispersystems.textsecure.api.push.exceptions.NonSuccessfulResponseCodeException;
+
+public class DeviceLimitExceededException extends NonSuccessfulResponseCodeException {
+
+  private final DeviceLimit deviceLimit;
+
+  public DeviceLimitExceededException(DeviceLimit deviceLimit) {
+    this.deviceLimit = deviceLimit;
+  }
+
+  public int getCurrent() {
+    return deviceLimit.getCurrent();
+  }
+
+  public int getMax() {
+    return deviceLimit.getMax();
+  }
+}

java/src/main/java/org/whispersystems/textsecure/internal/push/PushServiceSocket.java

@@ -27,6 +27,7 @@ import org.whispersystems.libaxolotl.state.PreKeyRecord;
 import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
 import org.whispersystems.libaxolotl.util.guava.Optional;
 import org.whispersystems.textsecure.api.crypto.AttachmentCipherOutputStream;
+import org.whispersystems.textsecure.api.messages.multidevice.DeviceInfo;
 import org.whispersystems.textsecure.api.push.ContactTokenDetails;
 import org.whispersystems.textsecure.api.push.TextSecureAddress;
 import org.whispersystems.textsecure.api.push.SignedPreKeyEntity;
@@ -86,6 +87,7 @@ public class PushServiceSocket {
 
   private static final String PROVISIONING_CODE_PATH    = "/v1/devices/provisioning/code";
   private static final String PROVISIONING_MESSAGE_PATH = "/v1/provisioning/%s";
+  private static final String DEVICE_PATH               = "/v1/devices/%s";
 
   private static final String DIRECTORY_TOKENS_PATH     = "/v1/directory/tokens";
   private static final String DIRECTORY_VERIFY_PATH     = "/v1/directory/%s";
@@ -126,6 +128,15 @@ public class PushServiceSocket {
     return JsonUtil.fromJson(responseText, DeviceCode.class).getVerificationCode();
   }
 
+  public List<DeviceInfo> getDevices() throws IOException {
+    String responseText = makeRequest(String.format(DEVICE_PATH, ""), "GET", null);
+    return JsonUtil.fromJson(responseText, DeviceInfoList.class).getDevices();
+  }
+
+  public void removeDevice(long deviceId) throws IOException {
+    makeRequest(String.format(DEVICE_PATH, String.valueOf(deviceId)), "DELETE", null);
+  }
+
   public void sendProvisioningMessage(String destination, byte[] body) throws IOException {
     makeRequest(String.format(PROVISIONING_MESSAGE_PATH, destination), "PUT",
                 JsonUtil.toJson(new ProvisioningMessage(Base64.encodeBytes(body))));
@@ -483,6 +494,13 @@ public class PushServiceSocket {
           throw new PushNetworkException(e);
         }
         throw new StaleDevicesException(JsonUtil.fromJson(response, StaleDevices.class));
+      case 411:
+        try {
+          response = Util.readFully(connection.getErrorStream());
+        } catch (IOException e) {
+          throw new PushNetworkException(e);
+        }
+        throw new DeviceLimitExceededException(JsonUtil.fromJson(response, DeviceLimit.class));
       case 417:
         throw new ExpectationFailedException();
     }

java/src/main/java/org/whispersystems/textsecure/internal/push/TextSecureProtos.java

@@ -3150,6 +3150,20 @@ public final class TextSecureProtos {
      * <code>optional .textsecure.SyncMessage.Group group = 3;</code>
      */
     org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.GroupOrBuilder getGroupOrBuilder();
+
+    // optional .textsecure.SyncMessage.Request request = 4;
+    /**
+     * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+     */
+    boolean hasRequest();
+    /**
+     * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+     */
+    org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request getRequest();
+    /**
+     * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+     */
+    org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.RequestOrBuilder getRequestOrBuilder();
   }
   /**
    * Protobuf type {@code textsecure.SyncMessage}
@@ -3241,6 +3255,19 @@ public final class TextSecureProtos {
               bitField0_ |= 0x00000004;
               break;
             }
+            case 34: {
+              org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000008) == 0x00000008)) {
+                subBuilder = request_.toBuilder();
+              }
+              request_ = input.readMessage(org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(request_);
+                request_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000008;
+              break;
+            }
           }
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
@@ -5038,6 +5065,493 @@ public final class TextSecureProtos {
       // @@protoc_insertion_point(class_scope:textsecure.SyncMessage.Group)
     }
 
+    public interface RequestOrBuilder
+        extends com.google.protobuf.MessageOrBuilder {
+
+      // optional .textsecure.SyncMessage.Request.Type type = 1;
+      /**
+       * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+       */
+      boolean hasType();
+      /**
+       * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+       */
+      org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type getType();
+    }
+    /**
+     * Protobuf type {@code textsecure.SyncMessage.Request}
+     */
+    public static final class Request extends
+        com.google.protobuf.GeneratedMessage
+        implements RequestOrBuilder {
+      // Use Request.newBuilder() to construct.
+      private Request(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+        super(builder);
+        this.unknownFields = builder.getUnknownFields();
+      }
+      private Request(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+      private static final Request defaultInstance;
+      public static Request getDefaultInstance() {
+        return defaultInstance;
+      }
+
+      public Request getDefaultInstanceForType() {
+        return defaultInstance;
+      }
+
+      private final com.google.protobuf.UnknownFieldSet unknownFields;
+      @java.lang.Override
+      public final com.google.protobuf.UnknownFieldSet
+          getUnknownFields() {
+        return this.unknownFields;
+      }
+      private Request(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        initFields();
+        int mutable_bitField0_ = 0;
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+            com.google.protobuf.UnknownFieldSet.newBuilder();
+        try {
+          boolean done = false;
+          while (!done) {
+            int tag = input.readTag();
+            switch (tag) {
+              case 0:
+                done = true;
+                break;
+              default: {
+                if (!parseUnknownField(input, unknownFields,
+                                       extensionRegistry, tag)) {
+                  done = true;
+                }
+                break;
+              }
+              case 8: {
+                int rawValue = input.readEnum();
+                org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type value = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type.valueOf(rawValue);
+                if (value == null) {
+                  unknownFields.mergeVarintField(1, rawValue);
+                } else {
+                  bitField0_ |= 0x00000001;
+                  type_ = value;
+                }
+                break;
+              }
+            }
+          }
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          throw e.setUnfinishedMessage(this);
+        } catch (java.io.IOException e) {
+          throw new com.google.protobuf.InvalidProtocolBufferException(
+              e.getMessage()).setUnfinishedMessage(this);
+        } finally {
+          this.unknownFields = unknownFields.build();
+          makeExtensionsImmutable();
+        }
+      }
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.whispersystems.textsecure.internal.push.TextSecureProtos.internal_static_textsecure_SyncMessage_Request_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.whispersystems.textsecure.internal.push.TextSecureProtos.internal_static_textsecure_SyncMessage_Request_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.class, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder.class);
+      }
+
+      public static com.google.protobuf.Parser<Request> PARSER =
+          new com.google.protobuf.AbstractParser<Request>() {
+        public Request parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new Request(input, extensionRegistry);
+        }
+      };
+
+      @java.lang.Override
+      public com.google.protobuf.Parser<Request> getParserForType() {
+        return PARSER;
+      }
+
+      /**
+       * Protobuf enum {@code textsecure.SyncMessage.Request.Type}
+       */
+      public enum Type
+          implements com.google.protobuf.ProtocolMessageEnum {
+        /**
+         * <code>UNKNOWN = 0;</code>
+         */
+        UNKNOWN(0, 0),
+        /**
+         * <code>CONTACTS = 1;</code>
+         */
+        CONTACTS(1, 1),
+        ;
+
+        /**
+         * <code>UNKNOWN = 0;</code>
+         */
+        public static final int UNKNOWN_VALUE = 0;
+        /**
+         * <code>CONTACTS = 1;</code>
+         */
+        public static final int CONTACTS_VALUE = 1;
+
+
+        public final int getNumber() { return value; }
+
+        public static Type valueOf(int value) {
+          switch (value) {
+            case 0: return UNKNOWN;
+            case 1: return CONTACTS;
+            default: return null;
+          }
+        }
+
+        public static com.google.protobuf.Internal.EnumLiteMap<Type>
+            internalGetValueMap() {
+          return internalValueMap;
+        }
+        private static com.google.protobuf.Internal.EnumLiteMap<Type>
+            internalValueMap =
+              new com.google.protobuf.Internal.EnumLiteMap<Type>() {
+                public Type findValueByNumber(int number) {
+                  return Type.valueOf(number);
+                }
+              };
+
+        public final com.google.protobuf.Descriptors.EnumValueDescriptor
+            getValueDescriptor() {
+          return getDescriptor().getValues().get(index);
+        }
+        public final com.google.protobuf.Descriptors.EnumDescriptor
+            getDescriptorForType() {
+          return getDescriptor();
+        }
+        public static final com.google.protobuf.Descriptors.EnumDescriptor
+            getDescriptor() {
+          return org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDescriptor().getEnumTypes().get(0);
+        }
+
+        private static final Type[] VALUES = values();
+
+        public static Type valueOf(
+            com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
+          if (desc.getType() != getDescriptor()) {
+            throw new java.lang.IllegalArgumentException(
+              "EnumValueDescriptor is not for this type.");
+          }
+          return VALUES[desc.getIndex()];
+        }
+
+        private final int index;
+        private final int value;
+
+        private Type(int index, int value) {
+          this.index = index;
+          this.value = value;
+        }
+
+        // @@protoc_insertion_point(enum_scope:textsecure.SyncMessage.Request.Type)
+      }
+
+      private int bitField0_;
+      // optional .textsecure.SyncMessage.Request.Type type = 1;
+      public static final int TYPE_FIELD_NUMBER = 1;
+      private org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type type_;
+      /**
+       * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+       */
+      public boolean hasType() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+       */
+      public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type getType() {
+        return type_;
+      }
+
+      private void initFields() {
+        type_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type.UNKNOWN;
+      }
+      private byte memoizedIsInitialized = -1;
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized != -1) return isInitialized == 1;
+
+        memoizedIsInitialized = 1;
+        return true;
+      }
+
+      public void writeTo(com.google.protobuf.CodedOutputStream output)
+                          throws java.io.IOException {
+        getSerializedSize();
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
+          output.writeEnum(1, type_.getNumber());
+        }
+        getUnknownFields().writeTo(output);
+      }
+
+      private int memoizedSerializedSize = -1;
+      public int getSerializedSize() {
+        int size = memoizedSerializedSize;
+        if (size != -1) return size;
+
+        size = 0;
+        if (((bitField0_ & 0x00000001) == 0x00000001)) {
+          size += com.google.protobuf.CodedOutputStream
+            .computeEnumSize(1, type_.getNumber());
+        }
+        size += getUnknownFields().getSerializedSize();
+        memoizedSerializedSize = size;
+        return size;
+      }
+
+      private static final long serialVersionUID = 0L;
+      @java.lang.Override
+      protected java.lang.Object writeReplace()
+          throws java.io.ObjectStreamException {
+        return super.writeReplace();
+      }
+
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(byte[] data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(
+          byte[] data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseDelimitedFrom(java.io.InputStream input)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseDelimitedFrom(
+          java.io.InputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseDelimitedFrom(input, extensionRegistry);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(
+          com.google.protobuf.CodedInputStream input)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input);
+      }
+      public static org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return PARSER.parseFrom(input, extensionRegistry);
+      }
+
+      public static Builder newBuilder() { return Builder.create(); }
+      public Builder newBuilderForType() { return newBuilder(); }
+      public static Builder newBuilder(org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request prototype) {
+        return newBuilder().mergeFrom(prototype);
+      }
+      public Builder toBuilder() { return newBuilder(this); }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       * Protobuf type {@code textsecure.SyncMessage.Request}
+       */
+      public static final class Builder extends
+          com.google.protobuf.GeneratedMessage.Builder<Builder>
+         implements org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.RequestOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor
+            getDescriptor() {
+          return org.whispersystems.textsecure.internal.push.TextSecureProtos.internal_static_textsecure_SyncMessage_Request_descriptor;
+        }
+
+        protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return org.whispersystems.textsecure.internal.push.TextSecureProtos.internal_static_textsecure_SyncMessage_Request_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.class, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder.class);
+        }
+
+        // Construct using org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.newBuilder()
+        private Builder() {
+          maybeForceBuilderInitialization();
+        }
+
+        private Builder(
+            com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+          super(parent);
+          maybeForceBuilderInitialization();
+        }
+        private void maybeForceBuilderInitialization() {
+          if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          }
+        }
+        private static Builder create() {
+          return new Builder();
+        }
+
+        public Builder clear() {
+          super.clear();
+          type_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type.UNKNOWN;
+          bitField0_ = (bitField0_ & ~0x00000001);
+          return this;
+        }
+
+        public Builder clone() {
+          return create().mergeFrom(buildPartial());
+        }
+
+        public com.google.protobuf.Descriptors.Descriptor
+            getDescriptorForType() {
+          return org.whispersystems.textsecure.internal.push.TextSecureProtos.internal_static_textsecure_SyncMessage_Request_descriptor;
+        }
+
+        public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request getDefaultInstanceForType() {
+          return org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDefaultInstance();
+        }
+
+        public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request build() {
+          org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
+        }
+
+        public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request buildPartial() {
+          org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request result = new org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request(this);
+          int from_bitField0_ = bitField0_;
+          int to_bitField0_ = 0;
+          if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+            to_bitField0_ |= 0x00000001;
+          }
+          result.type_ = type_;
+          result.bitField0_ = to_bitField0_;
+          onBuilt();
+          return result;
+        }
+
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request) {
+            return mergeFrom((org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request)other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request other) {
+          if (other == org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDefaultInstance()) return this;
+          if (other.hasType()) {
+            setType(other.getType());
+          }
+          this.mergeUnknownFields(other.getUnknownFields());
+          return this;
+        }
+
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request parsedMessage = null;
+          try {
+            parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            parsedMessage = (org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request) e.getUnfinishedMessage();
+            throw e;
+          } finally {
+            if (parsedMessage != null) {
+              mergeFrom(parsedMessage);
+            }
+          }
+          return this;
+        }
+        private int bitField0_;
+
+        // optional .textsecure.SyncMessage.Request.Type type = 1;
+        private org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type type_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type.UNKNOWN;
+        /**
+         * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+         */
+        public boolean hasType() {
+          return ((bitField0_ & 0x00000001) == 0x00000001);
+        }
+        /**
+         * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+         */
+        public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type getType() {
+          return type_;
+        }
+        /**
+         * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+         */
+        public Builder setType(org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          bitField0_ |= 0x00000001;
+          type_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         * <code>optional .textsecure.SyncMessage.Request.Type type = 1;</code>
+         */
+        public Builder clearType() {
+          bitField0_ = (bitField0_ & ~0x00000001);
+          type_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Type.UNKNOWN;
+          onChanged();
+          return this;
+        }
+
+        // @@protoc_insertion_point(builder_scope:textsecure.SyncMessage.Request)
+      }
+
+      static {
+        defaultInstance = new Request(true);
+        defaultInstance.initFields();
+      }
+
+      // @@protoc_insertion_point(class_scope:textsecure.SyncMessage.Request)
+    }
+
     private int bitField0_;
     // optional .textsecure.SyncMessage.Sent sent = 1;
     public static final int SENT_FIELD_NUMBER = 1;
@@ -5105,10 +5619,33 @@ public final class TextSecureProtos {
       return group_;
     }
 
+    // optional .textsecure.SyncMessage.Request request = 4;
+    public static final int REQUEST_FIELD_NUMBER = 4;
+    private org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request request_;
+    /**
+     * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+     */
+    public boolean hasRequest() {
+      return ((bitField0_ & 0x00000008) == 0x00000008);
+    }
+    /**
+     * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+     */
+    public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request getRequest() {
+      return request_;
+    }
+    /**
+     * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+     */
+    public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.RequestOrBuilder getRequestOrBuilder() {
+      return request_;
+    }
+
     private void initFields() {
       sent_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Sent.getDefaultInstance();
       contacts_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Contacts.getDefaultInstance();
       group_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Group.getDefaultInstance();
+      request_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDefaultInstance();
     }
     private byte memoizedIsInitialized = -1;
     public final boolean isInitialized() {
@@ -5131,6 +5668,9 @@ public final class TextSecureProtos {
       if (((bitField0_ & 0x00000004) == 0x00000004)) {
         output.writeMessage(3, group_);
       }
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        output.writeMessage(4, request_);
+      }
       getUnknownFields().writeTo(output);
     }
 
@@ -5152,6 +5692,10 @@ public final class TextSecureProtos {
         size += com.google.protobuf.CodedOutputStream
           .computeMessageSize(3, group_);
       }
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(4, request_);
+      }
       size += getUnknownFields().getSerializedSize();
       memoizedSerializedSize = size;
       return size;
@@ -5263,6 +5807,7 @@ public final class TextSecureProtos {
           getSentFieldBuilder();
           getContactsFieldBuilder();
           getGroupFieldBuilder();
+          getRequestFieldBuilder();
         }
       }
       private static Builder create() {
@@ -5289,6 +5834,12 @@ public final class TextSecureProtos {
           groupBuilder_.clear();
         }
         bitField0_ = (bitField0_ & ~0x00000004);
+        if (requestBuilder_ == null) {
+          request_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDefaultInstance();
+        } else {
+          requestBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000008);
         return this;
       }
 
@@ -5341,6 +5892,14 @@ public final class TextSecureProtos {
         } else {
           result.group_ = groupBuilder_.build();
         }
+        if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
+          to_bitField0_ |= 0x00000008;
+        }
+        if (requestBuilder_ == null) {
+          result.request_ = request_;
+        } else {
+          result.request_ = requestBuilder_.build();
+        }
         result.bitField0_ = to_bitField0_;
         onBuilt();
         return result;
@@ -5366,6 +5925,9 @@ public final class TextSecureProtos {
         if (other.hasGroup()) {
           mergeGroup(other.getGroup());
         }
+        if (other.hasRequest()) {
+          mergeRequest(other.getRequest());
+        }
         this.mergeUnknownFields(other.getUnknownFields());
         return this;
       }
@@ -5744,6 +6306,123 @@ public final class TextSecureProtos {
         return groupBuilder_;
       }
 
+      // optional .textsecure.SyncMessage.Request request = 4;
+      private org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request request_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.RequestOrBuilder> requestBuilder_;
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public boolean hasRequest() {
+        return ((bitField0_ & 0x00000008) == 0x00000008);
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request getRequest() {
+        if (requestBuilder_ == null) {
+          return request_;
+        } else {
+          return requestBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public Builder setRequest(org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request value) {
+        if (requestBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          request_ = value;
+          onChanged();
+        } else {
+          requestBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000008;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public Builder setRequest(
+          org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder builderForValue) {
+        if (requestBuilder_ == null) {
+          request_ = builderForValue.build();
+          onChanged();
+        } else {
+          requestBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000008;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public Builder mergeRequest(org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request value) {
+        if (requestBuilder_ == null) {
+          if (((bitField0_ & 0x00000008) == 0x00000008) &&
+              request_ != org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDefaultInstance()) {
+            request_ =
+              org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.newBuilder(request_).mergeFrom(value).buildPartial();
+          } else {
+            request_ = value;
+          }
+          onChanged();
+        } else {
+          requestBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000008;
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public Builder clearRequest() {
+        if (requestBuilder_ == null) {
+          request_ = org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.getDefaultInstance();
+          onChanged();
+        } else {
+          requestBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000008);
+        return this;
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder getRequestBuilder() {
+        bitField0_ |= 0x00000008;
+        onChanged();
+        return getRequestFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      public org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.RequestOrBuilder getRequestOrBuilder() {
+        if (requestBuilder_ != null) {
+          return requestBuilder_.getMessageOrBuilder();
+        } else {
+          return request_;
+        }
+      }
+      /**
+       * <code>optional .textsecure.SyncMessage.Request request = 4;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.RequestOrBuilder> 
+          getRequestFieldBuilder() {
+        if (requestBuilder_ == null) {
+          requestBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.Request.Builder, org.whispersystems.textsecure.internal.push.TextSecureProtos.SyncMessage.RequestOrBuilder>(
+                  request_,
+                  getParentForChildren(),
+                  isClean());
+          request_ = null;
+        }
+        return requestBuilder_;
+      }
+
       // @@protoc_insertion_point(builder_scope:textsecure.SyncMessage)
     }
 
@@ -8919,6 +9598,11 @@ public final class TextSecureProtos {
   private static
     com.google.protobuf.GeneratedMessage.FieldAccessorTable
       internal_static_textsecure_SyncMessage_Group_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_textsecure_SyncMessage_Request_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_textsecure_SyncMessage_Request_fieldAccessorTable;
   private static com.google.protobuf.Descriptors.Descriptor
     internal_static_textsecure_AttachmentPointer_descriptor;
   private static
@@ -8961,28 +9645,32 @@ public final class TextSecureProtos {
       "ge\022\014\n\004body\030\001 \001(\t\0222\n\013attachments\030\002 \003(\0132\035." +
       "textsecure.AttachmentPointer\022\'\n\005group\030\003 " +
       "\001(\0132\030.textsecure.GroupContext\022\r\n\005flags\030\004" +
-      " \001(\r\"\030\n\005Flags\022\017\n\013END_SESSION\020\001\"\340\002\n\013SyncM" +
+      " \001(\r\"\030\n\005Flags\022\017\n\013END_SESSION\020\001\"\364\003\n\013SyncM" +
       "essage\022*\n\004sent\030\001 \001(\0132\034.textsecure.SyncMe" +
       "ssage.Sent\0222\n\010contacts\030\002 \001(\0132 .textsecur" +
       "e.SyncMessage.Contacts\022,\n\005group\030\003 \001(\0132\035." +
-      "textsecure.SyncMessage.Group\032X\n\004Sent\022\023\n\013" +
-      "destination\030\001 \001(\t\022\021\n\ttimestamp\030\002 \001(\004\022(\n\007" +
-      "message\030\003 \001(\0132\027.textsecure.DataMessage\0327",
-      "\n\010Contacts\022+\n\004blob\030\001 \001(\0132\035.textsecure.At" +
-      "tachmentPointer\0320\n\005Group\022\'\n\005group\030\001 \001(\0132" +
-      "\030.textsecure.GroupContext\"A\n\021AttachmentP" +
-      "ointer\022\n\n\002id\030\001 \001(\006\022\023\n\013contentType\030\002 \001(\t\022" +
-      "\013\n\003key\030\003 \001(\014\"\315\001\n\014GroupContext\022\n\n\002id\030\001 \001(" +
-      "\014\022+\n\004type\030\002 \001(\0162\035.textsecure.GroupContex" +
-      "t.Type\022\014\n\004name\030\003 \001(\t\022\017\n\007members\030\004 \003(\t\022-\n" +
-      "\006avatar\030\005 \001(\0132\035.textsecure.AttachmentPoi" +
-      "nter\"6\n\004Type\022\013\n\007UNKNOWN\020\000\022\n\n\006UPDATE\020\001\022\013\n" +
-      "\007DELIVER\020\002\022\010\n\004QUIT\020\003\"\220\001\n\016ContactDetails\022",
-      "\016\n\006number\030\001 \001(\t\022\014\n\004name\030\002 \001(\t\0221\n\006avatar\030" +
-      "\003 \001(\0132!.textsecure.ContactDetails.Avatar" +
-      "\032-\n\006Avatar\022\023\n\013contentType\030\001 \001(\t\022\016\n\006lengt" +
-      "h\030\002 \001(\004B?\n+org.whispersystems.textsecure" +
-      ".internal.pushB\020TextSecureProtos"
+      "textsecure.SyncMessage.Group\0220\n\007request\030" +
+      "\004 \001(\0132\037.textsecure.SyncMessage.Request\032X" +
+      "\n\004Sent\022\023\n\013destination\030\001 \001(\t\022\021\n\ttimestamp",
+      "\030\002 \001(\004\022(\n\007message\030\003 \001(\0132\027.textsecure.Dat" +
+      "aMessage\0327\n\010Contacts\022+\n\004blob\030\001 \001(\0132\035.tex" +
+      "tsecure.AttachmentPointer\0320\n\005Group\022\'\n\005gr" +
+      "oup\030\001 \001(\0132\030.textsecure.GroupContext\032`\n\007R" +
+      "equest\0222\n\004type\030\001 \001(\0162$.textsecure.SyncMe" +
+      "ssage.Request.Type\"!\n\004Type\022\013\n\007UNKNOWN\020\000\022" +
+      "\014\n\010CONTACTS\020\001\"A\n\021AttachmentPointer\022\n\n\002id" +
+      "\030\001 \001(\006\022\023\n\013contentType\030\002 \001(\t\022\013\n\003key\030\003 \001(\014" +
+      "\"\315\001\n\014GroupContext\022\n\n\002id\030\001 \001(\014\022+\n\004type\030\002 " +
+      "\001(\0162\035.textsecure.GroupContext.Type\022\014\n\004na",
+      "me\030\003 \001(\t\022\017\n\007members\030\004 \003(\t\022-\n\006avatar\030\005 \001(" +
+      "\0132\035.textsecure.AttachmentPointer\"6\n\004Type" +
+      "\022\013\n\007UNKNOWN\020\000\022\n\n\006UPDATE\020\001\022\013\n\007DELIVER\020\002\022\010" +
+      "\n\004QUIT\020\003\"\220\001\n\016ContactDetails\022\016\n\006number\030\001 " +
+      "\001(\t\022\014\n\004name\030\002 \001(\t\0221\n\006avatar\030\003 \001(\0132!.text" +
+      "secure.ContactDetails.Avatar\032-\n\006Avatar\022\023" +
+      "\n\013contentType\030\001 \001(\t\022\016\n\006length\030\002 \001(\004B?\n+o" +
+      "rg.whispersystems.textsecure.internal.pu" +
+      "shB\020TextSecureProtos"
     };
     com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
       new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
@@ -9012,7 +9700,7 @@ public final class TextSecureProtos {
           internal_static_textsecure_SyncMessage_fieldAccessorTable = new
             com.google.protobuf.GeneratedMessage.FieldAccessorTable(
               internal_static_textsecure_SyncMessage_descriptor,
-              new java.lang.String[] { "Sent", "Contacts", "Group", });
+              new java.lang.String[] { "Sent", "Contacts", "Group", "Request", });
           internal_static_textsecure_SyncMessage_Sent_descriptor =
             internal_static_textsecure_SyncMessage_descriptor.getNestedTypes().get(0);
           internal_static_textsecure_SyncMessage_Sent_fieldAccessorTable = new
@@ -9031,6 +9719,12 @@ public final class TextSecureProtos {
             com.google.protobuf.GeneratedMessage.FieldAccessorTable(
               internal_static_textsecure_SyncMessage_Group_descriptor,
               new java.lang.String[] { "Group", });
+          internal_static_textsecure_SyncMessage_Request_descriptor =
+            internal_static_textsecure_SyncMessage_descriptor.getNestedTypes().get(3);
+          internal_static_textsecure_SyncMessage_Request_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_textsecure_SyncMessage_Request_descriptor,
+              new java.lang.String[] { "Type", });
           internal_static_textsecure_AttachmentPointer_descriptor =
             getDescriptor().getMessageTypes().get(4);
           internal_static_textsecure_AttachmentPointer_fieldAccessorTable = new

protobuf/TextSecure.proto

@@ -52,9 +52,19 @@ message SyncMessage {
     optional GroupContext group = 1;
   }
 
+  message Request {
+    enum Type {
+      UNKNOWN  = 0;
+      CONTACTS = 1;
+    }
+
+    optional Type type = 1;
+  }
+
   optional Sent     sent     = 1;
   optional Contacts contacts = 2;
   optional Group    group    = 3;
+  optional Request  request  = 4;
 }
 
 message AttachmentPointer {