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Description
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You need to use raw sockets if you want to modify the IP headers.   PGM (unlike TRDP, which is on top of UDP) is its own IP protocol. This means that we have to modify the IP header to send PGM packets (for example to set the IP header router alert bit), and therefore needs to use raw sockets for that.

Other reasons to run RV daemon as root:

On Unix systems, if running with root privilege, the RV daemon  takes advantage of root priviledge to set the priority of the thread handling network reception to 'real-time'. It will then relinquish the priviledges and set itself back to a normal user id.

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