Replacement for BIO_get_port(), BIO_get_host_ip()

[Matt Caswell]

On 24/09/2021 07:05, Shivakumar Poojari wrote:
> Hi
> BIO_get_port(), BIO_get_host_ip(),  were deprecated in OpenSSL 1.1.0. 
> Trying for replacement for OpenSSl 3.0
> 
> Gone through the below man page, but not found alternative function.
> 
> https://www.openssl.org/docs/manmaster/man3/BIO_connect.html 
> <https://www.openssl.org/docs/manmaster/man3/BIO_connect.html>
> 
> please suggest,

These functions are deprecated because they only support IPv4.

Instead you can use BIO_lookup() (or possibly BIO_lookup_ex()) to lookup 
the given host/service (first and second parameters to BIO_lookup() 
respectively). Equivalent 3rd/4th/5th parameters to BIO_lookup() might 
be BIO_LOOKUP_CLIENT, AF_INET (for IPv4) and SOCK_STREAM (for TCP).

This will return you an initialised BIO_ADDRINFO() object (which you 
will have to later free using BIO_ADDRINFO_free()).

 From the BIO_ADDRINFO object you can get a pointer to an underlying 
BIO_ADDR using BIO_ADDRINFO_address(addrinfo). Finally you can use 
BIO_ADDR_rawaddress() to get address info, or BIO_ADDR_rawport() to get 
port info:

See:
https://www.openssl.org/docs/man3.0/man3/BIO_lookup.html
https://www.openssl.org/docs/man3.0/man3/BIO_ADDR_rawaddress.html

Matt