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libpq can now talk to either 3.0 or 2.0 protocol servers. It first tries

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protocol 3, then falls back to 2 if postmaster rejects the startup packet
with an old-format error message.  A side benefit of the rewrite is that
SSL-encrypted connections can now be made without blocking.  (I think,
anyway, but do not have a good way to test.)
This commit is contained in:
Tom Lane
2003-06-08 17:43:00 +00:00
parent 152ce7a490
commit 6bdb7aa4db
13 changed files with 3334 additions and 1554 deletions
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18
src/interfaces/libpq/libpq-fe.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: libpq-fe.h,v 1.92 2003/04/19 00:02:30 tgl Exp $
* $Id: libpq-fe.h,v 1.93 2003/06/08 17:43:00 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -38,9 +38,9 @@ extern "C"
typedef enum
{
/*
* Although you may decide to change this list in some way, values
* which become unused should never be removed, nor should constants
* be redefined - that would break compatibility with existing code.
* Although it is okay to add to this list, values which become unused
* should never be removed, nor should constants be redefined - that would
* break compatibility with existing code.
*/
CONNECTION_OK,
CONNECTION_BAD,
@@ -56,7 +56,9 @@ typedef enum
* postmaster. */
CONNECTION_AUTH_OK, /* Received authentication; waiting for
* backend startup. */
CONNECTION_SETENV /* Negotiating environment. */
CONNECTION_SETENV, /* Negotiating environment. */
CONNECTION_SSL_STARTUP, /* Negotiating SSL. */
CONNECTION_NEEDED /* Internal state: connect() needed */
} ConnStatusType;
typedef enum
@@ -71,7 +73,7 @@ typedef enum
typedef enum
{
PGRES_EMPTY_QUERY = 0,
PGRES_EMPTY_QUERY = 0, /* empty query string was executed */
PGRES_COMMAND_OK, /* a query command that doesn't return
* anything was executed properly by the
* backend */
@@ -82,8 +84,8 @@ typedef enum
PGRES_COPY_IN, /* Copy In data transfer in progress */
PGRES_BAD_RESPONSE, /* an unexpected response was recv'd from
* the backend */
PGRES_NONFATAL_ERROR,
PGRES_FATAL_ERROR
PGRES_NONFATAL_ERROR, /* notice or warning message */
PGRES_FATAL_ERROR /* query failed */
} ExecStatusType;
/* PGconn encapsulates a connection to the backend.