Hi, Thanks Michael. I'll check if your proposal fits my requirement. Regards, Sanjaya
On Wed, Jan 10, 2018 at 7:55 PM, Michael Richardson <m...@sandelman.ca> wrote: > > Sanjaya Joshi <joshi.sanj...@gmail.com> wrote: > > Is there a BIO family of API that OpenSSL provides to bind to a > > specific source IP address before creating a socket connection (using > > for e.g. BIO_new_connect()) ? > > I think not... BIO_new_connect() allocates the BIO, and so there isn't any > state to set up before you call that. > > I've had to add a place to store the sockaddr to the DGRAM method in order > to > make DTLS work the way I want it, and it could be extended to TCP sockets I > think, but not using the flow that you are using. > > However, you can provide the FD to the SSL context using BIO_set_fd() > and SSL_set_bio(): > > BIO_set_fd(inbio, connectedfd, BIO_NOCLOSE); > SSL_set_bio(ssl, inbio, outbio); > > Then you can set up the connectedfd any way you want, calling bind() before > connect. That means that you might have to parse the host/IP + port > yourself, but getaddrinfo() can do that for you, and > int BIO_lookup(const char *host, const char *service, > enum BIO_lookup_type lookup_type, > int family, int socktype, BIO_ADDRINFO **res); > > wraps it all nicely for you. > > > My application does not need to rely on the kernel-provided source IP > > address and hence the need for this. > > Just remember to test with IPv6 Link-Local addresses, because they do > matter, and they are hard to get right from userspace. > (And if you aren't doing IPv6 testing, then you probably shouldn't be > creating new code) > > -- > ] Never tell me the odds! | ipv6 mesh > networks [ > ] Michael Richardson, Sandelman Software Works | network > architect [ > ] m...@sandelman.ca http://www.sandelman.ca/ | ruby on > rails [ > > > -- > openssl-users mailing list > To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users > >
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