Pepper: Add support for multicast in PPB_UDPSocket API

ppapi/proxy/udp_socket_resource_base.cc

Index: ppapi/proxy/udp_socket_resource_base.cc
diff --git a/ppapi/proxy/udp_socket_resource_base.cc b/ppapi/proxy/udp_socket_resource_base.cc
index 8ed6d0299ed6b27d0613ca38e7019577e8495ca2..885ae6443dcb2f9d044befd2c9bd0acafc3dcbf2 100644
--- a/ppapi/proxy/udp_socket_resource_base.cc
+++ b/ppapi/proxy/udp_socket_resource_base.cc
@@ -67,32 +67,66 @@ int32_t UDPSocketResourceBase::SetOptionImpl(
   if (closed_)
     return PP_ERROR_FAILED;
 
-  SocketOptionData option_data;
+  // Check if socket is expected to be bound or not according to the option
   switch (name) {
     case PP_UDPSOCKET_OPTION_ADDRESS_REUSE:
-    case PP_UDPSOCKET_OPTION_BROADCAST: {
-      if ((check_bind_state || name == PP_UDPSOCKET_OPTION_ADDRESS_REUSE) &&
-          bind_called_) {
+      check_bind_state = true; // fallthrough
+    case PP_UDPSOCKET_OPTION_BROADCAST:
+    case PP_UDPSOCKET_OPTION_MULTICAST_LOOP:
+    case PP_UDPSOCKET_OPTION_MULTICAST_TTL:
+    case PP_UDPSOCKET_OPTION_MULTICAST_IF: {
+      if (check_bind_state && bind_called_) {
         // SetOption should fail in this case in order to give predictable
         // behavior while binding. Note that we use |bind_called_| rather
         // than |bound_| since the latter is only set on successful completion
         // of Bind().
         return PP_ERROR_FAILED;
       }
+      break;
+    }
+    case PP_UDPSOCKET_OPTION_SEND_BUFFER_SIZE:
+    case PP_UDPSOCKET_OPTION_RECV_BUFFER_SIZE:
+    case PP_UDPSOCKET_OPTION_MULTICAST_JOIN:
+    case PP_UDPSOCKET_OPTION_MULTICAST_LEAVE: {
+      if (check_bind_state && !bound_)
+        return PP_ERROR_FAILED;
+      break;
+    }
+  }
+
+  SocketOptionData option_data;
+  switch (name) {
+    case PP_UDPSOCKET_OPTION_ADDRESS_REUSE:
+    case PP_UDPSOCKET_OPTION_BROADCAST:
+    case PP_UDPSOCKET_OPTION_MULTICAST_LOOP: {
       if (value.type != PP_VARTYPE_BOOL)
         return PP_ERROR_BADARGUMENT;
       option_data.SetBool(PP_ToBool(value.value.as_bool));
       break;
     }
     case PP_UDPSOCKET_OPTION_SEND_BUFFER_SIZE:
-    case PP_UDPSOCKET_OPTION_RECV_BUFFER_SIZE: {
-      if (check_bind_state && !bound_)
-        return PP_ERROR_FAILED;
+    case PP_UDPSOCKET_OPTION_RECV_BUFFER_SIZE:
+    case PP_UDPSOCKET_OPTION_MULTICAST_IF: {
       if (value.type != PP_VARTYPE_INT32)
         return PP_ERROR_BADARGUMENT;
       option_data.SetInt32(value.value.as_int);
       break;
     }
+    case PP_UDPSOCKET_OPTION_MULTICAST_TTL: {
+      int32_t ival = value.value.as_int;
+      if (value.type != PP_VARTYPE_INT32 && (ival < 0 || ival > 255))
+        return PP_ERROR_BADARGUMENT;
+      option_data.SetInt32(ival);
+      break;
+    }
+    case PP_UDPSOCKET_OPTION_MULTICAST_JOIN:
+    case PP_UDPSOCKET_OPTION_MULTICAST_LEAVE: {
+      if (value.type != PP_VARTYPE_RESOURCE)
+        return PP_ERROR_BADARGUMENT;
+      PP_Resource resource = static_cast<PP_Resource>(value.value.as_id);
+      option_data.SetInt32(resource);
+      break;
+    }
     default: {
       NOTREACHED();
       return PP_ERROR_BADARGUMENT;