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Add positive defense against trying to connect when the connection 

option state hasn't been fully set up.  This is possible via PQreset()
and might occur in other code paths too, so a state flag seems the
most robust solution.  Per report from Arturs Zoldners.
This commit is contained in:
Tom Lane 2006-02-13 22:33:57 +00:00
parent 1cf13e6f36
commit 2fc80b9ae6
2 changed files with 16 additions and 5 deletions
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15
src/interfaces/libpq/fe-connect.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/interfaces/libpq/fe-connect.c,v 1.325 2006/01/11 08:43:13 neilc Exp $
* $PostgreSQL: pgsql/src/interfaces/libpq/fe-connect.c,v 1.326 2006/02/13 22:33:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -505,6 +505,13 @@ connectOptions2(PGconn *conn)
else
conn->sslmode = strdup(DefaultSSLMode);
/*
* Only if we get this far is it appropriate to try to connect.
* (We need a state flag, rather than just the boolean result of
* this function, in case someone tries to PQreset() the PGconn.)
*/
conn->options_valid = true;
return true;
}
@ -729,6 +736,9 @@ connectDBStart(PGconn *conn)
if (!conn)
return 0;
if (!conn->options_valid)
goto connect_errReturn;
/* Ensure our buffers are empty */
conn->inStart = conn->inCursor = conn->inEnd = 0;
conn->outCount = 0;
@ -1814,6 +1824,8 @@ makeEmptyPGconn(void)
conn->status = CONNECTION_BAD;
conn->asyncStatus = PGASYNC_IDLE;
conn->xactStatus = PQTRANS_IDLE;
conn->options_valid = false;
conn->nonblocking = false;
conn->setenv_state = SETENV_STATE_IDLE;
conn->client_encoding = PG_SQL_ASCII;
conn->verbosity = PQERRORS_DEFAULT;
@ -1838,7 +1850,6 @@ makeEmptyPGconn(void)
conn->inBuffer = (char *) malloc(conn->inBufSize);
conn->outBufSize = 16 * 1024;
conn->outBuffer = (char *) malloc(conn->outBufSize);
conn->nonblocking = FALSE;
initPQExpBuffer(&conn->errorMessage);
initPQExpBuffer(&conn->workBuffer);

6
src/interfaces/libpq/libpq-int.h
View File

@ -12,7 +12,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.109 2005/11/22 18:17:33 momjian Exp $
* $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.110 2006/02/13 22:33:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -276,9 +276,9 @@ struct pg_conn
/* Status indicators */
ConnStatusType status;
PGAsyncStatusType asyncStatus;
PGTransactionStatusType xactStatus;
/* note: xactStatus never changes to ACTIVE */
PGTransactionStatusType xactStatus; /* never changes to ACTIVE */
PGQueryClass queryclass;
bool options_valid; /* true if OK to attempt connection */
bool nonblocking; /* whether this connection is using nonblock
* sending semantics */
char copy_is_binary; /* 1 = copy binary, 0 = copy text */