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Commit39dc8ff

Browse files
author
Hiroshi Inoue
committed
1) Avoid an overflow of connection string for Access(Microsoft Jet).
2) Change to retry lower version in case of "Unsupported frontendprocotol".
1 parent6f33c17 commit39dc8ff

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8 files changed

+126
-54
lines changed

8 files changed

+126
-54
lines changed

‎src/interfaces/odbc/connection.c

Lines changed: 18 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -252,7 +252,10 @@ CC_Constructor()
252252
rv->transact_status=CONN_IN_AUTOCOMMIT;/* autocommit by default */
253253

254254
memset(&rv->connInfo,0,sizeof(ConnInfo));
255-
memcpy(&(rv->connInfo.drivers),&globals,sizeof(globals));
255+
#ifdefDRIVER_CURSOR_IMPLEMENT
256+
rv->connInfo.updatable_cursors=1;
257+
#endif/* DRIVER_CURSOR_IMPLEMENT */
258+
memcpy(&(rv->connInfo.drivers),&globals,sizeof(globals));
256259
rv->sock=SOCK_Constructor(rv);
257260
if (!rv->sock)
258261
returnNULL;
@@ -278,6 +281,7 @@ memcpy(&(rv->connInfo.drivers), &globals, sizeof(globals));
278281
rv->pg_version_number=.0;
279282
rv->pg_version_major=0;
280283
rv->pg_version_minor=0;
284+
rv->ms_jet=0;
281285
#ifdefMULTIBYTE
282286
rv->client_encoding=NULL;
283287
rv->server_encoding=NULL;
@@ -586,6 +590,7 @@ CC_connect(ConnectionClass *self, char do_password)
586590

587591
mylog("CC_connect(): DSN = '%s', server = '%s', port = '%s', database = '%s', username = '%s', password='%s'\n",ci->dsn,ci->server,ci->port,ci->database,ci->username,ci->password);
588592

593+
another_version_retry:
589594
/*
590595
* If the socket was closed for some reason (like a SQLDisconnect,
591596
* but no SQLFreeConnect then create a socket now.
@@ -690,6 +695,18 @@ CC_connect(ConnectionClass *self, char do_password)
690695
self->errornumber=CONN_INVALID_AUTHENTICATION;
691696
self->errormsg=msgbuffer;
692697
qlog("ERROR from backend during authentication: '%s'\n",self->errormsg);
698+
if (strncmp(msgbuffer,"Unsupported frontend protocol",29)==0)
699+
{/* retry older version */
700+
if (PROTOCOL_63(ci))
701+
strcpy(ci->protocol,PG62);
702+
else
703+
strcpy(ci->protocol,PG63);
704+
SOCK_Destructor(sock);
705+
self->sock= (SocketClass*)0;
706+
CC_initialize_pg_version(self);
707+
gotoanother_version_retry;
708+
}
709+
693710
return0;
694711
case'R':
695712

‎src/interfaces/odbc/connection.h

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -160,6 +160,7 @@ typedef struct
160160
chartranslation_option[SMALL_REGISTRY_LEN];
161161
charfocus_password;
162162
chardisallow_premature;
163+
charupdatable_cursors;
163164
GLOBAL_VALUESdrivers;/* moved from driver's option */
164165
}ConnInfo;
165166

@@ -274,6 +275,7 @@ struct ConnectionClass_
274275
floatpg_version_number;
275276
Int2pg_version_major;
276277
Int2pg_version_minor;
278+
charms_jet;
277279
#ifdefMULTIBYTE
278280
char*client_encoding;
279281
char*server_encoding;

‎src/interfaces/odbc/dlg_specific.c

Lines changed: 20 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -510,6 +510,7 @@ makeConnectString(char *connect_string, const ConnInfo *ci, UWORD len)
510510
chargot_dsn= (ci->dsn[0]!='\0');
511511
charencoded_conn_settings[LARGE_REGISTRY_LEN];
512512
UWORDhlen;
513+
BOOLabbrev= (len <=400);
513514

514515
/* fundamental info */
515516
sprintf(connect_string,"%s=%s;DATABASE=%s;SERVER=%s;PORT=%s;UID=%s;PWD=%s",
@@ -524,8 +525,9 @@ makeConnectString(char *connect_string, const ConnInfo *ci, UWORD len)
524525
encode(ci->conn_settings,encoded_conn_settings);
525526

526527
/* extra info */
527-
hlen=strlen(connect_string),
528-
sprintf(&connect_string[hlen],
528+
hlen=strlen(connect_string);
529+
if (!abbrev)
530+
sprintf(&connect_string[hlen],
529531
";READONLY=%s;PROTOCOL=%s;FAKEOIDINDEX=%s;SHOWOIDCOLUMN=%s;ROWVERSIONING=%s;SHOWSYSTEMTABLES=%s;CONNSETTINGS=%s;FETCH=%d;SOCKET=%d;UNKNOWNSIZES=%d;MAXVARCHARSIZE=%d;MAXLONGVARCHARSIZE=%d;DEBUG=%d;COMMLOG=%d;OPTIMIZER=%d;KSQO=%d;USEDECLAREFETCH=%d;TEXTASLONGVARCHAR=%d;UNKNOWNSASLONGVARCHAR=%d;BOOLSASCHAR=%d;PARSE=%d;CANCELASFREESTMT=%d;EXTRASYSTABLEPREFIXES=%s",
530532
ci->onlyread,
531533
ci->protocol,
@@ -551,7 +553,7 @@ makeConnectString(char *connect_string, const ConnInfo *ci, UWORD len)
551553
ci->drivers.cancel_as_freestmt,
552554
ci->drivers.extra_systable_prefixes);
553555
/* Abbrebiation is needed ? */
554-
if (strlen(connect_string) >=len)
556+
if (abbrev||strlen(connect_string) >=len)
555557
sprintf(&connect_string[hlen],
556558
";A0=%s;A1=%s;A2=%s;A3=%s;A4=%s;A5=%s;A6=%s;A7=%d;A8=%d;A9=%d;B0=%d;B1=%d;B2=%d;B3=%d;B4=%d;B5=%d;B6=%d;B7=%d;B8=%d;B9=%d;C0=%d;C1=%d;C2=%s",
557559
ci->onlyread,
@@ -630,7 +632,10 @@ copyAttributes(ConnInfo *ci, const char *attribute, const char *value)
630632
elseif (stricmp(attribute,INI_DISALLOWPREMATURE)==0||stricmp(attribute,"C3")==0)
631633
{
632634
ci->disallow_premature=atoi(value);
633-
/* strcpy(ci->conn_settings, value); */
635+
}
636+
elseif (stricmp(attribute,INI_UPDATABLECURSORS)==0||stricmp(attribute,"C4")==0)
637+
{
638+
ci->updatable_cursors=atoi(value);
634639
}
635640

636641
mylog("copyAttributes: DSN='%s',server='%s',dbase='%s',user='%s',passwd='%s',port='%s',onlyread='%s',protocol='%s',conn_settings='%s',disallow_premature=%d)\n",ci->dsn,ci->server,ci->database,ci->username,ci->password,ci->port,ci->onlyread,ci->protocol,ci->conn_settings,ci->disallow_premature);
@@ -803,6 +808,12 @@ getDSNinfo(ConnInfo *ci, char overwrite)
803808
ci->disallow_premature=atoi(temp);
804809
}
805810

811+
if (ci->updatable_cursors==0||overwrite)
812+
{
813+
SQLGetPrivateProfileString(DSN,INI_UPDATABLECURSORS,"",temp,sizeof(temp),ODBC_INI);
814+
ci->updatable_cursors=atoi(temp);
815+
}
816+
806817
/* Allow override of odbcinst.ini parameters here */
807818
getCommonDefaults(DSN,ODBC_INI,ci);
808819

@@ -916,6 +927,11 @@ writeDSNinfo(const ConnInfo *ci)
916927
INI_DISALLOWPREMATURE,
917928
temp,
918929
ODBC_INI);
930+
sprintf(temp,"%d",ci->updatable_cursors);
931+
SQLWritePrivateProfileString(DSN,
932+
INI_UPDATABLECURSORS,
933+
temp,
934+
ODBC_INI);
919935
}
920936

921937

‎src/interfaces/odbc/dlg_specific.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -96,6 +96,7 @@
9696
#defineINI_TRANSLATIONDLL"TranslationDLL"
9797
#defineINI_TRANSLATIONOPTION"TranslationOption"
9898
#defineINI_DISALLOWPREMATURE"DisallowPremature"
99+
#defineINI_UPDATABLECURSORS"UpdatableCursors"
99100

100101

101102
/*Connection Defaults */

‎src/interfaces/odbc/drvconn.c

Lines changed: 6 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
/*-------
2-
* Module:drvconn.c
2+
Module:drvconn.c
33
*
44
* Description:This module contains only routines related to
55
*implementing SQLDriverConnect.
@@ -88,6 +88,7 @@ PGAPI_DriverConnect(
8888
intretval;
8989
charpassword_required= FALSE;
9090
intlen=0;
91+
SWORDlenStrout;
9192

9293

9394
mylog("%s: entering...\n",func);
@@ -211,7 +212,10 @@ PGAPI_DriverConnect(
211212
*/
212213
result=SQL_SUCCESS;
213214

214-
makeConnectString(connStrOut,ci,cbConnStrOutMax);
215+
lenStrout=cbConnStrOutMax;
216+
if (conn->ms_jet&&lenStrout>255)
217+
lenStrout=255;
218+
makeConnectString(connStrOut,ci,lenStrout);
215219
len=strlen(connStrOut);
216220

217221
if (szConnStrOut)

‎src/interfaces/odbc/info.c

Lines changed: 20 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -166,19 +166,17 @@ PGAPI_GetInfo(
166166
caseSQL_CURSOR_COMMIT_BEHAVIOR:/* ODBC 1.0 */
167167
len=2;
168168
value=SQL_CB_CLOSE;
169-
#ifdefDRIVER_CURSOR_IMPLEMENT
170-
if (!ci->drivers.use_declarefetch)
171-
value=SQL_CB_PRESERVE;
172-
#endif/* DRIVER_CURSOR_IMPLEMENT */
169+
if (ci->updatable_cursors)
170+
if (!ci->drivers.use_declarefetch)
171+
value=SQL_CB_PRESERVE;
173172
break;
174173

175174
caseSQL_CURSOR_ROLLBACK_BEHAVIOR:/* ODBC 1.0 */
176175
len=2;
177176
value=SQL_CB_CLOSE;
178-
#ifdefDRIVER_CURSOR_IMPLEMENT
179-
if (!ci->drivers.use_declarefetch)
180-
value=SQL_CB_PRESERVE;
181-
#endif/* DRIVER_CURSOR_IMPLEMENT */
177+
if (ci->updatable_cursors)
178+
if (!ci->drivers.use_declarefetch)
179+
value=SQL_CB_PRESERVE;
182180
break;
183181

184182
caseSQL_DATA_SOURCE_NAME:/* ODBC 1.0 */
@@ -235,7 +233,7 @@ PGAPI_GetInfo(
235233
if (dver[0])
236234
{
237235
intmajor,minor;
238-
mylog("REIGISTRY_ODBC_VER = %s\n",dver)
236+
mylog("REGISTRY_ODBC_VER = %s\n",dver)
239237
;
240238
if (sscanf(dver,"%x.%x",&major,&minor) >=2)
241239
{
@@ -524,6 +522,8 @@ PGAPI_GetInfo(
524522
caseSQL_POS_OPERATIONS:/* ODBC 2.0 */
525523
len=4;
526524
value=ci->drivers.lie ? (SQL_POS_POSITION |SQL_POS_REFRESH |SQL_POS_UPDATE |SQL_POS_DELETE |SQL_POS_ADD) : (SQL_POS_POSITION |SQL_POS_REFRESH);
525+
if (ci->updatable_cursors)
526+
value |= (SQL_POS_UPDATE |SQL_POS_DELETE |SQL_POS_ADD);
527527
break;
528528

529529
caseSQL_POSITIONED_STATEMENTS:/* ODBC 2.0 */
@@ -571,15 +571,18 @@ PGAPI_GetInfo(
571571
* Driver doesn't support keyset-driven or mixed cursors, so
572572
* not much point in saying row updates are supported
573573
*/
574-
p=ci->drivers.lie ?"Y" :"N";
574+
p=(ci->drivers.lie||ci->updatable_cursors) ?"Y" :"N";
575575
break;
576576

577577
caseSQL_SCROLL_CONCURRENCY:/* ODBC 1.0 */
578578
len=4;
579579
value=ci->drivers.lie ? (SQL_SCCO_READ_ONLY |
580580
SQL_SCCO_LOCK |
581581
SQL_SCCO_OPT_ROWVER |
582-
SQL_SCCO_OPT_VALUES) : (SQL_SCCO_READ_ONLY);
582+
SQL_SCCO_OPT_VALUES) :
583+
(SQL_SCCO_READ_ONLY);
584+
if (ci->updatable_cursors)
585+
value |=SQL_SCCO_OPT_ROWVER;
583586
break;
584587

585588
caseSQL_SCROLL_OPTIONS:/* ODBC 1.0 */
@@ -588,7 +591,10 @@ PGAPI_GetInfo(
588591
SQL_SO_STATIC |
589592
SQL_SO_KEYSET_DRIVEN |
590593
SQL_SO_DYNAMIC |
591-
SQL_SO_MIXED) : (ci->drivers.use_declarefetch ?SQL_SO_FORWARD_ONLY : (SQL_SO_FORWARD_ONLY |SQL_SO_STATIC));
594+
SQL_SO_MIXED)
595+
: (ci->drivers.use_declarefetch ?SQL_SO_FORWARD_ONLY : (SQL_SO_FORWARD_ONLY |SQL_SO_STATIC));
596+
if (ci->updatable_cursors)
597+
value |=0;/* SQL_SO_KEYSET_DRIVEN in the furure */
592598
break;
593599

594600
caseSQL_SEARCH_PATTERN_ESCAPE:/* ODBC 1.0 */
@@ -606,6 +612,8 @@ PGAPI_GetInfo(
606612
caseSQL_STATIC_SENSITIVITY:/* ODBC 2.0 */
607613
len=4;
608614
value=ci->drivers.lie ? (SQL_SS_ADDITIONS |SQL_SS_DELETIONS |SQL_SS_UPDATES) :0;
615+
if (ci->updatable_cursors)
616+
value |= (SQL_SS_ADDITIONS |SQL_SS_DELETIONS |SQL_SS_UPDATES);
609617
break;
610618

611619
caseSQL_STRING_FUNCTIONS:/* ODBC 1.0 */

‎src/interfaces/odbc/options.c

Lines changed: 9 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -412,6 +412,15 @@ PGAPI_SetConnectOption(
412412
conn->errormsg="Unknown connect option (Set)";
413413
conn->errornumber=CONN_UNSUPPORTED_OPTION;
414414
sprintf(option,"fOption=%d, vParam=%ld",fOption,vParam);
415+
if (fOption==30002&&vParam)
416+
{
417+
if (strcmp((char*)vParam,"Microsoft Jet")==0)
418+
{
419+
conn->errornumber=0;
420+
conn->ms_jet=1;
421+
returnSQL_SUCCESS;
422+
}
423+
}
415424
CC_log_error(func,option,conn);
416425
returnSQL_ERROR;
417426
}

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