Question

In C does the function inet_pton() convert only the ip address from printble to string format or it also converts ip address and port number too? I mean, if I have a string of format A.B.C.D:E where A.B.C.D is the ip and E is the port number, would I be able to use inet_pton for the same?

Answer 1

No, it does not handle port numbers. The man page specifies exactly what it expects for IPv4 addresses:

src points to a character string containing an IPv4 network address in
dotted-decimal format, “ddd.ddd.ddd.ddd”, where ddd is a decimal number
of up to three digits in the range 0 to 255. The address is converted
to a struct in_addr and copied to dst, which must be sizeof(struct
in_addr) (4) bytes (32 bits) long.