otIp4CidrToString() function
Converts the IPv4 CIDR to a string. The string format uses quad-dotted notation of four bytes in the address with the length of prefix (e.g., "127.0.0.1/32"). If the resulting string does not fit in @p aBuffer (within its @p aSize characters), the string will be truncated but the outputted string is always null-terminated.
Arguments
aCidr
A pointer to an IPv4 CIDR (MUST NOT be NULL).
aBuffer
A pointer to a char array to output the string (MUST NOT be `nullptr`).
aSize
The size of @p aBuffer (in bytes).
otIp4CidrToString():
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otIp4CidrToString()