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cifs: factor out check for extended security bit into separate function 

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Jeff Layton 2013-05-26 07:00:58 -04:00 committed by Steve French
parent 9ddec56131
commit 9193400b69
1 changed files with 16 additions and 9 deletions
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25
fs/cifs/cifssmb.c
View File

@ -539,6 +539,20 @@ decode_lanman_negprot_rsp(struct TCP_Server_Info *server, NEGOTIATE_RSP *pSMBr,
}
#endif
static bool
should_set_ext_sec_flag(unsigned int secFlags)
{
if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
return true;
else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5)
return true;
else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
return true;
else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP)
return true;
return false;
}
int
CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
{
@ -572,15 +586,8 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
pSMB->hdr.Mid = get_next_mid(server);
pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) {
cifs_dbg(FYI, "Kerberos only mechanism, enable extended security\n");
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
} else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) {
cifs_dbg(FYI, "NTLMSSP only mechanism, enable extended security\n");
if (should_set_ext_sec_flag(secFlags)) {
cifs_dbg(FYI, "Requesting extended security.");
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
}