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bind, udp and broadcast

I'm moving some code to MacOSX/Darwin written for Linux and Windows which use some non-portable techniques. What I need to do is receive ipv4 udp packets sent to the interface address, the interface's broadcast address, and the all-1's broadcast (INADDR_BROADCAST), and know which interface the packet was received on and what the destination ip address of the packet is. Linux and newer versions of Windows can do this with IP_PKTINFO, and I was hoping IP_RECVDSTADDR could help me here.

Unfortunately, it seems broadcast packets are only received on sockets either bound to INADDR_ANY or to the specific broadcast address. IP_RECVDSTADDR could help me determine which interface the first two cases came in on, but not the INADDR_ANY situation.

I don't want to resort to bpf to do this. Is there another option? And why don't broadcast packets show up on sockets bound to the interface address?
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