The include file ports.tc defines macros for almost all TCP and UDP port names and numbers registered by IANA.2.5
The names of port macros begin with PORT_, followed by the port
name in upper case. Special characters (e.g. hyphens, asterisks, or
dots) in the port name are converted to underscores. As a special case
++ becomes _PP.
When the IANA port numbers database contains multiple port numbers for the same name, the entry with the highest number is used. If an entry defines a range, the lower bound of the range is used.
#define PORT_HTTP 80 /* http */ #define PORT_HTTP_ALT 8080 /* http-alt */