Re: How do I get the remote address and port of a SSH client connecting to a SSH server?

[Nicolas Lykke Iversen <nlykkei@xxxxxxxxx>]

Thank you Stef,

What socket do you use to get the address and port of the client? In what
structure is it located?

-Nicolas

2017-07-21 15:55 GMT+02:00 Stef Bon <stefbon@xxxxxxxxx>:

> 2017-07-21 14:11 GMT+02:00 Nicolas Lykke Iversen <nlykkei@xxxxxxxxx>:
> > I've a working SSH client and server written using libssh.
> >
> > On the server side, I would like to know the address and port of the
> client
> > once it has connected.
> >
> > Looking through ssh_bind and ssh_session, I can get the address and port
> on
> > which the server listens. However, I cannot find any fields to get the
> > address and port of the connected client?
>
> I just know a general method. Recently I had the same issue.
> If you have a socket (=fd) for the connection between server and client,
> get the sockaddr addr using:
>
> getpeername(fd, &addr, &len)
>
> this addr is the input for getnameinfo:
>
> getnameinfo(&addr, len, buffer, NI_MAXHOST, NULL, 0, NI_NAMEREQD);
>
> where
> char buffer[NI_MAXHOST]
> see man getnameinfo.
>
> in buffer is the hostname of the client as the server knows it. This
> may not be the exact dns name,
> if the hostnames are not available through dns.
>
> O and the address in case of ipv4 is simular:
>
> struct sockaddr_in addr
> socklen_t len=sizeof(struct sockaddr_in);
> getpeername(fd, &addr, &len);
> address=inet_ntoa(addr.sin_addr);
>
> Stef
>
>