It seems that Iran and Israel are already at war but both sides seem to be keeping quiet about it.

U.S. Officials Confirm Israel Struck in Sudan - Michael R. Gordon and Jeffrey Gettleman
American officials said Israeli planes bombed a convoy of trucks in Sudan in January believed to be carrying arms to Gaza during the weeks it was fighting a war with Hamas there. Two American officials who are privy to classified intelligence assessments said Iran had been involved in the effort to smuggle weapons to Gaza and that an operative with Iran's Islamic Revolutionary Guards Corps had gone to Sudan to coordinate the effort. One American military official said the strike was one of a series of Israeli attacks against arms shipments bound for Gaza. (New York Times)
    See also Report: Second Airstrike Hit Iranian Ship at Sea
A new report by Sudanese sources cited an additional strike on a ship possibly making its way to Sudan from Iran. "There were indeed two strikes in Sudan, in January and February," Sudan's deputy transportation minister told Israel's Channel 10 television on Thursday. "The second strike was against a ship at sea and it was completely destroyed," another Sudanese official said. (Jerusalem Post)