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Low Power Assistant Middleware Library 5.5.0
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Low Power Assistant Middleware Library 5.5.0
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Usually a single port is filtered but port ranges are also supported, where the range is from portnum thru portnum + range.
Port ranges are expected to be used with short lived ephemeral source port numbers. Port numbers are described in numerous places such https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
Data Fields | |
| uint16_t | portnum |
| Port number. More... | |
| uint16_t | range |
| Range: Allows a block of portnumbers to be filtered. More... | |
| cy_pn_direction_t | direction |
| Source or Destination port. More... | |
| uint16_t cy_pf_port_t::portnum |
Port number.
Any 16 bit port number can be specified. For a description and list of port numbers see: https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
| uint16_t cy_pf_port_t::range |
Range: Allows a block of portnumbers to be filtered.
Range must be of the form 2^y - 1 (511, 1023, etc) and must be less than portnum. When using range, portnum must be of the form 2^x (256, 512, etc). Example: portnum == 16384, range = 1023 will filter ports 16384-17407
If any of these checks for using ranges fails, fallback to filtering for just 'portnum'.
| cy_pn_direction_t cy_pf_port_t::direction |
Source or Destination port.
Dest is default unless source port override is on