Is it so hard to look at the README? > This is tricky. This uses the ssl3_write_bytes() function in order to send heartbeats encrypted after the SSL handshake

Is it so hard to look at the README? > This is tricky. This uses the ssl3_write_bytes() function in order to send heartbeats encrypted after the SSL handshake is complete. This function is sometimes exported in OpenSSL libraries, and sometimes not. > If that's the trouble, then you have to download and build OpenSSL, then link this tool with their object files. I did this by doing: git clone git://git.openssl.org/openssl.git cd openssl ./config make depend make gcc ../heartleech/heartleech.c libcrypto.a libssl.a -ldl -o heartleech > This is evil, because I'm simultaneously linking to the local libraries and the system libraries for OpenSSL, but it seems to work without too much trouble.