[CIFS] Support for setting up SMB sessions to legacy lanman servers
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index f003692..da3154f 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -44,8 +44,11 @@
int index;
char *name;
} protocols[] = {
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+ {LANMAN_PROT, "\2LM1.2X002"},
+#endif /* weak password hashing for legacy clients */
{CIFS_PROT, "\2NT LM 0.12"},
- {CIFS_PROT, "\2POSIX 2"},
+ {POSIX_PROT, "\2POSIX 2"},
{BAD_PROT, "\2"}
};
#else
@@ -53,11 +56,29 @@
int index;
char *name;
} protocols[] = {
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+ {LANMAN_PROT, "\2LM1.2X002"},
+#endif /* weak password hashing for legacy clients */
{CIFS_PROT, "\2NT LM 0.12"},
{BAD_PROT, "\2"}
};
#endif
+/* define the number of elements in the cifs dialect array */
+#ifdef CONFIG_CIFS_POSIX
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+#define CIFS_NUM_PROT 3
+#else
+#define CIFS_NUM_PROT 2
+#endif /* CIFS_WEAK_PW_HASH */
+#else /* not posix */
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+#define CIFS_NUM_PROT 2
+#else
+#define CIFS_NUM_PROT 1
+#endif /* CONFIG_CIFS_WEAK_PW_HASH */
+#endif /* CIFS_POSIX */
+
/* Mark as invalid, all open files on tree connections since they
were closed when session to server was lost */
@@ -322,7 +343,8 @@
/* potential retries of smb operations it turns out we can determine */
/* from the mid flags when the request buffer can be resent without */
/* having to use a second distinct buffer for the response */
- *response_buf = *request_buf;
+ if(response_buf)
+ *response_buf = *request_buf;
header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon,
wct /*wct */ );
@@ -373,6 +395,7 @@
NEGOTIATE_RSP *pSMBr;
int rc = 0;
int bytes_returned;
+ int i;
struct TCP_Server_Info * server;
u16 count;
@@ -388,19 +411,71 @@
return rc;
pSMB->hdr.Mid = GetNextMid(server);
pSMB->hdr.Flags2 |= SMBFLG2_UNICODE;
- if (extended_security)
- pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
-
- count = strlen(protocols[0].name) + 1;
- strncpy(pSMB->DialectsArray, protocols[0].name, 30);
- /* null guaranteed to be at end of source and target buffers anyway */
-
+/* if (extended_security)
+ pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;*/
+
+ count = 0;
+ for(i=0;i<CIFS_NUM_PROT;i++) {
+ strncpy(pSMB->DialectsArray+count, protocols[i].name, 16);
+ count += strlen(protocols[i].name) + 1;
+ /* null at end of source and target buffers anyway */
+ }
pSMB->hdr.smb_buf_length += count;
pSMB->ByteCount = cpu_to_le16(count);
rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
if (rc == 0) {
+ cFYI(1,("Dialect: %d", pSMBr->DialectIndex));
+ /* Check wct = 1 error case */
+ if((pSMBr->hdr.WordCount < 13)
+ || (pSMBr->DialectIndex == BAD_PROT)) {
+ /* core returns wct = 1, but we do not ask for
+ core - otherwise it just comes when dialect
+ index is -1 indicating we could not negotiate
+ a common dialect */
+ rc = -EOPNOTSUPP;
+ goto neg_err_exit;
+ } else if((pSMBr->hdr.WordCount == 13) &&
+ (pSMBr->DialectIndex == LANMAN_PROT)) {
+ struct lanman_neg_rsp * rsp =
+ (struct lanman_neg_rsp *)pSMBr;
+
+
+ /* BB Mark ses struct as negotiated lanman level BB */
+ server->secType = LANMAN;
+ server->secMode = (__u8)le16_to_cpu(rsp->SecurityMode);
+ server->maxReq = le16_to_cpu(rsp->MaxMpxCount);
+ server->maxBuf = min((__u32)le16_to_cpu(rsp->MaxBufSize),
+ (__u32)CIFSMaxBufSize + MAX_CIFS_HDR_SIZE);
+
+ /* BB what do we do with raw mode? BB */
+ server->timeZone = le16_to_cpu(rsp->ServerTimeZone);
+ /* Do we have to set signing flags? no signing
+ was available LANMAN - default should be ok */
+
+ /* BB FIXME set default dummy capabilities since
+ they are not returned by the server in this dialect */
+
+ /* get server time for time conversions and add
+ code to use it and timezone since this is not UTC */
+
+ if (rsp->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
+ memcpy(server->cryptKey, rsp->EncryptionKey,
+ CIFS_CRYPTO_KEY_SIZE);
+ } else {
+ rc = -EIO;
+ goto neg_err_exit;
+ }
+
+ cFYI(1,("LANMAN negotiated")); /* BB removeme BB */
+ goto neg_err_exit;
+ } else if(pSMBr->hdr.WordCount != 17) {
+ /* unknown wct */
+ rc = -EOPNOTSUPP;
+ goto neg_err_exit;
+ }
+
server->secMode = pSMBr->SecurityMode;
if((server->secMode & SECMODE_USER) == 0)
cFYI(1,("share mode security"));
@@ -479,7 +554,7 @@
}
}
-
+neg_err_exit:
cifs_buf_release(pSMB);
return rc;
}
