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cifs: remove rfc1002 header from smb2_negotiate_req 

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Ronnie Sahlberg 2017-11-20 11:24:30 +11:00 committed by Steve French
parent 83b7739180
commit 13cacea7bb
2 changed files with 21 additions and 19 deletions
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38
fs/cifs/smb2pdu.c
View File

@ -398,8 +398,8 @@ small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
}
#ifdef CONFIG_CIFS_SMB311
/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
/* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
@ -427,23 +427,25 @@ build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
}
static void
assemble_neg_contexts(struct smb2_negotiate_req *req)
assemble_neg_contexts(struct smb2_negotiate_req *req,
unsigned int *total_len)
{
/* +4 is to account for the RFC1001 len field */
char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT;
build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
/* Add 2 to size to round to 8 byte boundary */
pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
req->NegotiateContextCount = cpu_to_le16(2);
inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context)
+ sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
*total_len += 4 + sizeof(struct smb2_preauth_neg_context)
+ sizeof(struct smb2_encryption_neg_context);
}
#else
static void assemble_neg_contexts(struct smb2_negotiate_req *req)
static void assemble_neg_contexts(struct smb2_negotiate_req *req,
unsigned int *total_len)
{
return;
}
@ -477,6 +479,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
int blob_offset, blob_length;
char *security_blob;
int flags = CIFS_NEG_OP;
unsigned int total_len;
cifs_dbg(FYI, "Negotiate protocol\n");
@ -485,30 +488,30 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
return -EIO;
}
rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
if (rc)
return rc;
req->hdr.sync_hdr.SessionId = 0;
req->sync_hdr.SessionId = 0;
if (strcmp(ses->server->vals->version_string,
SMB3ANY_VERSION_STRING) == 0) {
req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
req->DialectCount = cpu_to_le16(2);
inc_rfc1001_len(req, 4);
total_len += 4;
} else if (strcmp(ses->server->vals->version_string,
SMBDEFAULT_VERSION_STRING) == 0) {
req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
req->DialectCount = cpu_to_le16(3);
inc_rfc1001_len(req, 6);
total_len += 6;
} else {
/* otherwise send specific dialect */
req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
req->DialectCount = cpu_to_le16(1);
inc_rfc1001_len(req, 2);
total_len += 2;
}
/* only one of SMB2 signing flags may be set in SMB2 request */
@ -528,13 +531,12 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
memcpy(req->ClientGUID, server->client_guid,
SMB2_CLIENT_GUID_SIZE);
if (ses->server->vals->protocol_id == SMB311_PROT_ID)
assemble_neg_contexts(req);
assemble_neg_contexts(req, &total_len);
}
iov[0].iov_base = (char *)req;
/* 4 for rfc1002 length field */
iov[0].iov_len = get_rfc1002_length(req) + 4;
iov[0].iov_len = total_len;
rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
cifs_small_buf_release(req);
rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
/*

2
fs/cifs/smb2pdu.h
View File

@ -195,7 +195,7 @@ struct smb2_symlink_err_rsp {
#define SMB2_CLIENT_GUID_SIZE 16
struct smb2_negotiate_req {
struct smb2_hdr hdr;
struct smb2_sync_hdr sync_hdr;
__le16 StructureSize; /* Must be 36 */
__le16 DialectCount;
__le16 SecurityMode;