libpq: Set Server Name Indication (SNI) for SSL connections
By default, have libpq set the TLS extension "Server Name Indication" (SNI).
This allows an SNI-aware SSL proxy to route connections. (This
requires a proxy that is aware of the PostgreSQL protocol, not just
any SSL proxy.)
In the future, this could also allow the server to use different SSL
certificates for different host specifications. (That would require
new server functionality. This would be the client-side functionality
for that.)
Since SNI makes the host name appear in cleartext in the network
traffic, this might be undesirable in some cases. Therefore, also add
a libpq connection option "sslsni" to turn it off.
Discussion: https://www.postgresql.org/message-id/flat/7289d5eb-62a5-a732-c3b9-438cee2cb709%40enterprisedb.com
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/5c55dc8b47338e72a4e598c155d2048d756fd10e
Modified Files
--------------
contrib/postgres_fdw/expected/postgres_fdw.out | 2 +-
doc/src/sgml/libpq.sgml | 31 ++++++++++++++++++++++++++
src/interfaces/libpq/fe-connect.c | 6 +++++
src/interfaces/libpq/fe-secure-openssl.c | 22 ++++++++++++++++++
src/interfaces/libpq/libpq-int.h | 1 +
5 files changed, 61 insertions(+), 1 deletion(-)
