Remove support for version-0 FE/BE protocol, per pghackers discussion.

This breaks support for 6.2 or older client libraries.

doc/src/sgml/release.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.153 2002/08/29 00:17:01 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.154 2002/08/29 03:22:00 tgl Exp $
 -->
 
 <appendix id="release">
@@ -24,6 +24,7 @@ CDATA means the content is "SGML-free", so you can write without
 worries about funny characters.
 -->
 <literallayout><![CDATA[
+Client libraries older than 6.3 no longer supported (version 0 protocol removed)
 PREPARE statement allows caching query plans for interactive statements
 Type OPAQUE is now deprecated in favor of pseudo-types cstring, trigger, etc
 Standalone composite types can now be created with CREATE TYPE

src/backend/libpq/auth.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/libpq/auth.c,v 1.85 2002/08/27 16:21:50 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/libpq/auth.c,v 1.86 2002/08/29 03:22:01 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -37,11 +37,8 @@
 
 
 static void sendAuthRequest(Port *port, AuthRequest areq);
-static int	old_be_recvauth(Port *port);
-static int	map_old_to_new(Port *port, UserAuth old, int status);
 static void auth_failed(Port *port, int status);
 static int	recv_and_check_password_packet(Port *port);
-static int	recv_and_check_passwordv0(Port *port);
 
 char	   *pg_krb_server_keyfile;
 
@@ -318,86 +315,6 @@ pg_krb5_recvauth(Port *port)
 #endif   /* KRB5 */
 
 
-/*
- * Handle a v0 password packet.
- */
-static int
-recv_and_check_passwordv0(Port *port)
-{
-	int32		len;
-	char	   *buf;
-	PasswordPacketV0 *pp;
-	char	   *user,
-			   *password,
-			   *cp,
-			   *start;
-	int			status;
-
-	if (pq_getint(&len, 4) == EOF)
-		return STATUS_EOF;
-	len -= 4;
-	buf = palloc(len);
-	if (pq_getbytes(buf, len) == EOF)
-	{
-		pfree(buf);
-		return STATUS_EOF;
-	}
-
-	pp = (PasswordPacketV0 *) buf;
-
-	/*
-	 * The packet is supposed to comprise the user name and the password
-	 * as C strings.  Be careful to check that this is the case.
-	 */
-	user = password = NULL;
-
-	len -= sizeof(pp->unused);
-
-	cp = start = pp->data;
-
-	while (len-- > 0)
-		if (*cp++ == '\0')
-		{
-			if (user == NULL)
-				user = start;
-			else
-			{
-				password = start;
-				break;
-			}
-
-			start = cp;
-		}
-
-	if (user == NULL || password == NULL)
-	{
-		elog(LOG, "pg_password_recvauth: badly formed password packet");
-		status = STATUS_ERROR;
-	}
-	else
-	{
-		UserAuth	saved;
-
-		/* Check the password. */
-
-		saved = port->auth_method;
-		port->auth_method = uaPassword;
-
-		status = md5_crypt_verify(port, user, password);
-
-		port->auth_method = saved;
-
-		/* Adjust the result if necessary. */
-		if (map_old_to_new(port, uaPassword, status) != STATUS_OK)
-			status = STATUS_ERROR;
-	}
-
-	pfree(buf);
-
-	return status;
-}
-
-
 /*
  * Tell the user the authentication failed, but not (much about) why.
  *
@@ -481,16 +398,6 @@ ClientAuthentication(Port *port)
 	if (hba_getauthmethod(port) != STATUS_OK)
 		elog(FATAL, "Missing or erroneous pg_hba.conf file, see postmaster log for details");
 
-	/* Handle old style authentication. */
-	if (PG_PROTOCOL_MAJOR(port->proto) == 0)
-	{
-		status = old_be_recvauth(port);
-		if (status != STATUS_OK)
-			auth_failed(port, status);
-		return;
-	}
-
-	/* Handle new style authentication. */
 	switch (port->auth_method)
 	{
 		case uaReject:
@@ -828,90 +735,3 @@ recv_and_check_password_packet(Port *port)
 	pfree(buf.data);
 	return result;
 }
-
-
-/*
- * Server demux routine for incoming authentication information for protocol
- * version 0.
- */
-static int
-old_be_recvauth(Port *port)
-{
-	int			status;
-	MsgType		msgtype = (MsgType) port->proto;
-
-	/* Handle the authentication that's offered. */
-	switch (msgtype)
-	{
-		case STARTUP_KRB4_MSG:
-			status = map_old_to_new(port, uaKrb4, pg_krb4_recvauth(port));
-			break;
-
-		case STARTUP_KRB5_MSG:
-			status = map_old_to_new(port, uaKrb5, pg_krb5_recvauth(port));
-			break;
-
-		case STARTUP_MSG:
-			status = map_old_to_new(port, uaTrust, STATUS_OK);
-			break;
-
-		case STARTUP_PASSWORD_MSG:
-			status = recv_and_check_passwordv0(port);
-			break;
-
-		default:
-			elog(LOG, "Invalid startup message type: %u", msgtype);
-
-			return STATUS_ERROR;
-	}
-
-	return status;
-}
-
-
-/*
- * The old style authentication has been done.	Modify the result of this (eg.
- * allow the connection anyway, disallow it anyway, or use the result)
- * depending on what authentication we really want to use.
- */
-static int
-map_old_to_new(Port *port, UserAuth old, int status)
-{
-	switch (port->auth_method)
-	{
-		case uaMD5:
-		case uaCrypt:
-		case uaReject:
-#ifdef USE_PAM
-		case uaPAM:
-#endif   /* USE_PAM */
-			status = STATUS_ERROR;
-			break;
-
-		case uaKrb4:
-			if (old != uaKrb4)
-				status = STATUS_ERROR;
-			break;
-
-		case uaKrb5:
-			if (old != uaKrb5)
-				status = STATUS_ERROR;
-			break;
-
-		case uaTrust:
-			status = STATUS_OK;
-			break;
-
-		case uaIdent:
-			status = authident(port);
-			break;
-
-		case uaPassword:
-			if (old != uaPassword)
-				status = STATUS_ERROR;
-
-			break;
-	}
-
-	return status;
-}

src/backend/libpq/pqformat.c

@@ -16,7 +16,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$Id: pqformat.c,v 1.22 2002/08/08 06:32:26 ishii Exp $
+ *	$Id: pqformat.c,v 1.23 2002/08/29 03:22:01 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -57,41 +57,6 @@
 #include <endian.h>
 #endif
 
-#ifndef BYTE_ORDER
-#error BYTE_ORDER must be defined as LITTLE_ENDIAN, BIG_ENDIAN or PDP_ENDIAN
-#endif
-
-#if BYTE_ORDER == LITTLE_ENDIAN
-
-#define ntoh_s(n)	n
-#define ntoh_l(n)	n
-#define hton_s(n)	n
-#define hton_l(n)	n
-
-#else
-#if BYTE_ORDER == BIG_ENDIAN
-
-#define ntoh_s(n)	(uint16)((((uint16)n & 0x00ff) <<  8) | \
-				 (((uint16)n & 0xff00) >>  8))
-#define ntoh_l(n)	(uint32)((((uint32)n & 0x000000ff) << 24) | \
-				 (((uint32)n & 0x0000ff00) <<  8) | \
-				 (((uint32)n & 0x00ff0000) >>  8) | \
-				 (((uint32)n & 0xff000000) >> 24))
-#define hton_s(n)	(ntoh_s(n))
-#define hton_l(n)	(ntoh_l(n))
-
-#else
-#if BYTE_ORDER == PDP_ENDIAN
-
-#error PDP_ENDIAN macros not written yet
-
-#else
-
-#error BYTE_ORDER not defined as anything understood
-#endif
-#endif
-#endif
-
 
 /* --------------------------------
  *		pq_sendbyte		- append a raw byte to a StringInfo buffer
@@ -183,11 +148,11 @@ pq_sendint(StringInfo buf, int i, int b)
 			appendBinaryStringInfo(buf, (char *) &n8, 1);
 			break;
 		case 2:
-			n16 = ((PG_PROTOCOL_MAJOR(FrontendProtocol) == 0) ? hton_s(i) : htons((uint16) i));
+			n16 = htons((uint16) i);
 			appendBinaryStringInfo(buf, (char *) &n16, 2);
 			break;
 		case 4:
-			n32 = ((PG_PROTOCOL_MAJOR(FrontendProtocol) == 0) ? hton_l(i) : htonl((uint32) i));
+			n32 = htonl((uint32) i);
 			appendBinaryStringInfo(buf, (char *) &n32, 4);
 			break;
 		default:
@@ -261,13 +226,11 @@ pq_getint(int *result, int b)
 			break;
 		case 2:
 			status = pq_getbytes((char *) &n16, 2);
-			*result = (int) ((PG_PROTOCOL_MAJOR(FrontendProtocol) == 0) ?
-							 ntoh_s(n16) : ntohs(n16));
+			*result = (int) (ntohs(n16));
 			break;
 		case 4:
 			status = pq_getbytes((char *) &n32, 4);
-			*result = (int) ((PG_PROTOCOL_MAJOR(FrontendProtocol) == 0) ?
-							 ntoh_l(n32) : ntohl(n32));
+			*result = (int) (ntohl(n32));
 			break;
 		default:
 

src/include/libpq/libpq-be.h

@@ -11,7 +11,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: libpq-be.h,v 1.33 2002/08/18 03:03:26 momjian Exp $
+ * $Id: libpq-be.h,v 1.34 2002/08/29 03:22:01 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -29,17 +29,8 @@
 #endif
 
 
-/* Protocol v0 password packet. */
-
-typedef struct PasswordPacketV0
-{
-	uint32		unused;
-	char		data[288];		/* User and password as strings. */
-} PasswordPacketV0;
-
-
 /*
- * This is used by the postmaster in its communication with frontends.	It is
+ * This is used by the postmaster in its communication with frontends.	It
  * contains all state information needed during this communication before the
  * backend is run.
  */

src/include/libpq/pqcomm.h

@@ -9,7 +9,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pqcomm.h,v 1.68 2002/08/27 16:21:51 momjian Exp $
+ * $Id: pqcomm.h,v 1.69 2002/08/29 03:22:01 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -93,7 +93,7 @@ typedef union SockAddr
 
 /* The earliest and latest frontend/backend protocol version supported. */
 
-#define PG_PROTOCOL_EARLIEST	PG_PROTOCOL(0,0)
+#define PG_PROTOCOL_EARLIEST	PG_PROTOCOL(1,0)
 #define PG_PROTOCOL_LATEST	PG_PROTOCOL(2,0)
 
 /*
@@ -127,6 +127,9 @@ typedef uint32 PacketLen;
 
 typedef uint32 ProtocolVersion; /* Fe/Be protocol version number */
 
+typedef ProtocolVersion MsgType;
+
+
 typedef struct StartupPacket
 {
 	ProtocolVersion protoVersion;		/* Protocol version */
@@ -153,16 +156,6 @@ extern bool Db_user_namespace;
 typedef uint32 AuthRequest;
 
 
-/* This next section is to maintain compatibility with protocol v0.0. */
-
-#define STARTUP_MSG		7		/* Initialise a connection */
-#define STARTUP_KRB4_MSG	10	/* krb4 session follows */
-#define STARTUP_KRB5_MSG	11	/* krb5 session follows */
-#define STARTUP_PASSWORD_MSG	14		/* Password follows */
-
-typedef ProtocolVersion MsgType;
-
-
 /* A client can also send a cancel-current-operation request to the postmaster.
  * This is uglier than sending it directly to the client's backend, but it
  * avoids depending on out-of-band communication facilities.

src/interfaces/libpq/fe-auth.c

@@ -10,7 +10,7 @@
  * exceed INITIAL_EXPBUFFER_SIZE (currently 256 bytes).
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-auth.c,v 1.68 2002/07/20 05:43:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-auth.c,v 1.69 2002/08/29 03:22:01 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -63,6 +63,11 @@
  * common definitions for generic fe/be routines
  */
 
+#define STARTUP_MSG		7		/* Initialise a connection */
+#define STARTUP_KRB4_MSG	10	/* krb4 session follows */
+#define STARTUP_KRB5_MSG	11	/* krb5 session follows */
+#define STARTUP_PASSWORD_MSG	14		/* Password follows */
+
 struct authsvc
 {
 	const char *name;			/* service nickname (for command line) */