Lots of diplomatic maneuvering going across the globe in the realignment of the world order after Russia got over the post Soviet Union slump and China has risen as a power offsetting some of the U.S influence across the world.
At this time there is a loosely coupled alliance - Russia and China forming SCO, opposing US and other western countries tooth and nail in the Syria conflict and Iran.
U.S has shown that they are here to stay in Asia by way of President Obama's Asian Pacific strategy where U.S would oppose China.
There are other countries like Japan which is starting to equip itself militarily which itself is a bad news for China. Then there is India which is yet to show its cards.
For Russia, personally they would want India to align with them but Russia wants China as well in their side to offset the western powers - US, UK and other western powers. But Russia knows that China and India can't get along. And India has been in Tango with US recently thereby throwing Russia off balance. So Russia wants to keep their options open by opening a channel with Pakistan.
My belief is until and when India shows its cards, Russia will not decide.