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This refactoring is in preparation for adding support for other SSL implementations, with no user-visible effects. There are now two #defines, USE_OPENSSL which is defined when building with OpenSSL, and USE_SSL which is defined when building with any SSL implementation. Currently, OpenSSL is the only implementation so the two #defines go together, but USE_SSL is supposed to be used for implementation-independent code. The libpq SSL code is changed to use a custom BIO, which does all the raw I/O, like we've been doing in the backend for a long time. That makes it possible to use MSG_NOSIGNAL to block SIGPIPE when using SSL, which avoids a couple of syscall for each send(). Probably doesn't make much performance difference in practice - the SSL encryption is expensive enough to mask the effect - but it was a natural result of this refactoring. Based on a patch by Martijn van Oosterhout from 2006. Briefly reviewed by Alvaro Herrera, Andreas Karlsson, Jeff Janes. |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.