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-rw-r--r--source4/smb_server/smb/receive.c679
1 files changed, 679 insertions, 0 deletions
diff --git a/source4/smb_server/smb/receive.c b/source4/smb_server/smb/receive.c
new file mode 100644
index 0000000..b96cdbd
--- /dev/null
+++ b/source4/smb_server/smb/receive.c
@@ -0,0 +1,679 @@
+/*
+ Unix SMB/CIFS implementation.
+ process incoming packets - main loop
+ Copyright (C) Andrew Tridgell 1992-2005
+ Copyright (C) James J Myers 2003 <myersjj@samba.org>
+ Copyright (C) Stefan Metzmacher 2004-2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/time.h"
+#include "lib/util/server_id.h"
+#include "samba/service_stream.h"
+#include "smb_server/smb_server.h"
+#include "system/filesys.h"
+#include "param/param.h"
+#include "cluster/cluster.h"
+
+/*
+ send an oplock break request to a client
+*/
+NTSTATUS smbsrv_send_oplock_break(void *p, struct ntvfs_handle *ntvfs, uint8_t level)
+{
+ struct smbsrv_tcon *tcon = talloc_get_type(p, struct smbsrv_tcon);
+ struct smbsrv_request *req;
+
+ req = smbsrv_init_request(tcon->smb_conn);
+ NT_STATUS_HAVE_NO_MEMORY(req);
+
+ smbsrv_setup_reply(req, 8, 0);
+
+ SCVAL(req->out.hdr,HDR_COM,SMBlockingX);
+ SSVAL(req->out.hdr,HDR_TID,tcon->tid);
+ SSVAL(req->out.hdr,HDR_PID,0xFFFF);
+ SSVAL(req->out.hdr,HDR_UID,0);
+ SSVAL(req->out.hdr,HDR_MID,0xFFFF);
+ SCVAL(req->out.hdr,HDR_FLG,0);
+ SSVAL(req->out.hdr,HDR_FLG2,0);
+
+ SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
+ SSVAL(req->out.vwv, VWV(1), 0);
+ smbsrv_push_fnum(req->out.vwv, VWV(2), ntvfs);
+ SCVAL(req->out.vwv, VWV(3), LOCKING_ANDX_OPLOCK_RELEASE);
+ SCVAL(req->out.vwv, VWV(3)+1, level);
+ SIVAL(req->out.vwv, VWV(4), 0);
+ SSVAL(req->out.vwv, VWV(6), 0);
+ SSVAL(req->out.vwv, VWV(7), 0);
+
+ smbsrv_send_reply(req);
+ return NT_STATUS_OK;
+}
+
+static void switch_message(int type, struct smbsrv_request *req);
+
+/*
+ These flags determine some of the permissions required to do an operation
+*/
+#define NEED_SESS (1<<0)
+#define NEED_TCON (1<<1)
+#define SIGNING_NO_REPLY (1<<2)
+/* does VWV(0) of the request hold chaining information */
+#define AND_X (1<<3)
+/* The 64Kb question: are requests > 64K valid? */
+#define LARGE_REQUEST (1<<4)
+
+/*
+ define a list of possible SMB messages and their corresponding
+ functions. Any message that has a NULL function is unimplemented -
+ please feel free to contribute implementations!
+*/
+static const struct smb_message_struct
+{
+ const char *name;
+ void (*fn)(struct smbsrv_request *);
+#define message_flags(type) smb_messages[(type) & 0xff].flags
+ int flags;
+}
+ smb_messages[256] = {
+/* 0x00 */ { "SMBmkdir", smbsrv_reply_mkdir, NEED_SESS|NEED_TCON },
+/* 0x01 */ { "SMBrmdir", smbsrv_reply_rmdir, NEED_SESS|NEED_TCON },
+/* 0x02 */ { "SMBopen", smbsrv_reply_open, NEED_SESS|NEED_TCON },
+/* 0x03 */ { "SMBcreate", smbsrv_reply_mknew, NEED_SESS|NEED_TCON },
+/* 0x04 */ { "SMBclose", smbsrv_reply_close, NEED_SESS|NEED_TCON },
+/* 0x05 */ { "SMBflush", smbsrv_reply_flush, NEED_SESS|NEED_TCON },
+/* 0x06 */ { "SMBunlink", smbsrv_reply_unlink, NEED_SESS|NEED_TCON },
+/* 0x07 */ { "SMBmv", smbsrv_reply_mv, NEED_SESS|NEED_TCON },
+/* 0x08 */ { "SMBgetatr", smbsrv_reply_getatr, NEED_SESS|NEED_TCON },
+/* 0x09 */ { "SMBsetatr", smbsrv_reply_setatr, NEED_SESS|NEED_TCON },
+/* 0x0a */ { "SMBread", smbsrv_reply_read, NEED_SESS|NEED_TCON },
+/* 0x0b */ { "SMBwrite", smbsrv_reply_write, NEED_SESS|NEED_TCON },
+/* 0x0c */ { "SMBlock", smbsrv_reply_lock, NEED_SESS|NEED_TCON },
+/* 0x0d */ { "SMBunlock", smbsrv_reply_unlock, NEED_SESS|NEED_TCON },
+/* 0x0e */ { "SMBctemp", smbsrv_reply_ctemp, NEED_SESS|NEED_TCON },
+/* 0x0f */ { "SMBmknew", smbsrv_reply_mknew, NEED_SESS|NEED_TCON },
+/* 0x10 */ { "SMBcheckpath", smbsrv_reply_chkpth, NEED_SESS|NEED_TCON },
+/* 0x11 */ { "SMBexit", smbsrv_reply_exit, NEED_SESS },
+/* 0x12 */ { "SMBlseek", smbsrv_reply_lseek, NEED_SESS|NEED_TCON },
+/* 0x13 */ { "SMBlockread", smbsrv_reply_lockread, NEED_SESS|NEED_TCON },
+/* 0x14 */ { "SMBwriteunlock", smbsrv_reply_writeunlock, NEED_SESS|NEED_TCON },
+/* 0x15 */ { NULL, NULL, 0 },
+/* 0x16 */ { NULL, NULL, 0 },
+/* 0x17 */ { NULL, NULL, 0 },
+/* 0x18 */ { NULL, NULL, 0 },
+/* 0x19 */ { NULL, NULL, 0 },
+/* 0x1a */ { "SMBreadbraw", smbsrv_reply_readbraw, NEED_SESS|NEED_TCON },
+/* 0x1b */ { "SMBreadBmpx", smbsrv_reply_readbmpx, NEED_SESS|NEED_TCON },
+/* 0x1c */ { "SMBreadBs", NULL, 0 },
+/* 0x1d */ { "SMBwritebraw", smbsrv_reply_writebraw, NEED_SESS|NEED_TCON },
+/* 0x1e */ { "SMBwriteBmpx", smbsrv_reply_writebmpx, NEED_SESS|NEED_TCON },
+/* 0x1f */ { "SMBwriteBs", smbsrv_reply_writebs, NEED_SESS|NEED_TCON },
+/* 0x20 */ { "SMBwritec", NULL, 0 },
+/* 0x21 */ { NULL, NULL, 0 },
+/* 0x22 */ { "SMBsetattrE", smbsrv_reply_setattrE, NEED_SESS|NEED_TCON },
+/* 0x23 */ { "SMBgetattrE", smbsrv_reply_getattrE, NEED_SESS|NEED_TCON },
+/* 0x24 */ { "SMBlockingX", smbsrv_reply_lockingX, NEED_SESS|NEED_TCON|AND_X },
+/* 0x25 */ { "SMBtrans", smbsrv_reply_trans, NEED_SESS|NEED_TCON },
+/* 0x26 */ { "SMBtranss", smbsrv_reply_transs, NEED_SESS|NEED_TCON },
+/* 0x27 */ { "SMBioctl", smbsrv_reply_ioctl, NEED_SESS|NEED_TCON },
+/* 0x28 */ { "SMBioctls", NULL, NEED_SESS|NEED_TCON },
+/* 0x29 */ { "SMBcopy", smbsrv_reply_copy, NEED_SESS|NEED_TCON },
+/* 0x2a */ { "SMBmove", NULL, NEED_SESS|NEED_TCON },
+/* 0x2b */ { "SMBecho", smbsrv_reply_echo, 0 },
+/* 0x2c */ { "SMBwriteclose", smbsrv_reply_writeclose, NEED_SESS|NEED_TCON },
+/* 0x2d */ { "SMBopenX", smbsrv_reply_open_and_X, NEED_SESS|NEED_TCON|AND_X },
+/* 0x2e */ { "SMBreadX", smbsrv_reply_read_and_X, NEED_SESS|NEED_TCON|AND_X },
+/* 0x2f */ { "SMBwriteX", smbsrv_reply_write_and_X, NEED_SESS|NEED_TCON|AND_X|LARGE_REQUEST},
+/* 0x30 */ { NULL, NULL, 0 },
+/* 0x31 */ { NULL, NULL, 0 },
+/* 0x32 */ { "SMBtrans2", smbsrv_reply_trans2, NEED_SESS|NEED_TCON },
+/* 0x33 */ { "SMBtranss2", smbsrv_reply_transs2, NEED_SESS|NEED_TCON },
+/* 0x34 */ { "SMBfindclose", smbsrv_reply_findclose, NEED_SESS|NEED_TCON },
+/* 0x35 */ { "SMBfindnclose", smbsrv_reply_findnclose, NEED_SESS|NEED_TCON },
+/* 0x36 */ { NULL, NULL, 0 },
+/* 0x37 */ { NULL, NULL, 0 },
+/* 0x38 */ { NULL, NULL, 0 },
+/* 0x39 */ { NULL, NULL, 0 },
+/* 0x3a */ { NULL, NULL, 0 },
+/* 0x3b */ { NULL, NULL, 0 },
+/* 0x3c */ { NULL, NULL, 0 },
+/* 0x3d */ { NULL, NULL, 0 },
+/* 0x3e */ { NULL, NULL, 0 },
+/* 0x3f */ { NULL, NULL, 0 },
+/* 0x40 */ { NULL, NULL, 0 },
+/* 0x41 */ { NULL, NULL, 0 },
+/* 0x42 */ { NULL, NULL, 0 },
+/* 0x43 */ { NULL, NULL, 0 },
+/* 0x44 */ { NULL, NULL, 0 },
+/* 0x45 */ { NULL, NULL, 0 },
+/* 0x46 */ { NULL, NULL, 0 },
+/* 0x47 */ { NULL, NULL, 0 },
+/* 0x48 */ { NULL, NULL, 0 },
+/* 0x49 */ { NULL, NULL, 0 },
+/* 0x4a */ { NULL, NULL, 0 },
+/* 0x4b */ { NULL, NULL, 0 },
+/* 0x4c */ { NULL, NULL, 0 },
+/* 0x4d */ { NULL, NULL, 0 },
+/* 0x4e */ { NULL, NULL, 0 },
+/* 0x4f */ { NULL, NULL, 0 },
+/* 0x50 */ { NULL, NULL, 0 },
+/* 0x51 */ { NULL, NULL, 0 },
+/* 0x52 */ { NULL, NULL, 0 },
+/* 0x53 */ { NULL, NULL, 0 },
+/* 0x54 */ { NULL, NULL, 0 },
+/* 0x55 */ { NULL, NULL, 0 },
+/* 0x56 */ { NULL, NULL, 0 },
+/* 0x57 */ { NULL, NULL, 0 },
+/* 0x58 */ { NULL, NULL, 0 },
+/* 0x59 */ { NULL, NULL, 0 },
+/* 0x5a */ { NULL, NULL, 0 },
+/* 0x5b */ { NULL, NULL, 0 },
+/* 0x5c */ { NULL, NULL, 0 },
+/* 0x5d */ { NULL, NULL, 0 },
+/* 0x5e */ { NULL, NULL, 0 },
+/* 0x5f */ { NULL, NULL, 0 },
+/* 0x60 */ { NULL, NULL, 0 },
+/* 0x61 */ { NULL, NULL, 0 },
+/* 0x62 */ { NULL, NULL, 0 },
+/* 0x63 */ { NULL, NULL, 0 },
+/* 0x64 */ { NULL, NULL, 0 },
+/* 0x65 */ { NULL, NULL, 0 },
+/* 0x66 */ { NULL, NULL, 0 },
+/* 0x67 */ { NULL, NULL, 0 },
+/* 0x68 */ { NULL, NULL, 0 },
+/* 0x69 */ { NULL, NULL, 0 },
+/* 0x6a */ { NULL, NULL, 0 },
+/* 0x6b */ { NULL, NULL, 0 },
+/* 0x6c */ { NULL, NULL, 0 },
+/* 0x6d */ { NULL, NULL, 0 },
+/* 0x6e */ { NULL, NULL, 0 },
+/* 0x6f */ { NULL, NULL, 0 },
+/* 0x70 */ { "SMBtcon", smbsrv_reply_tcon, NEED_SESS },
+/* 0x71 */ { "SMBtdis", smbsrv_reply_tdis, NEED_TCON },
+/* 0x72 */ { "SMBnegprot", smbsrv_reply_negprot, 0 },
+/* 0x73 */ { "SMBsesssetupX", smbsrv_reply_sesssetup, AND_X },
+/* 0x74 */ { "SMBulogoffX", smbsrv_reply_ulogoffX, NEED_SESS|AND_X }, /* ulogoff doesn't give a valid TID */
+/* 0x75 */ { "SMBtconX", smbsrv_reply_tcon_and_X, NEED_SESS|AND_X },
+/* 0x76 */ { NULL, NULL, 0 },
+/* 0x77 */ { NULL, NULL, 0 },
+/* 0x78 */ { NULL, NULL, 0 },
+/* 0x79 */ { NULL, NULL, 0 },
+/* 0x7a */ { NULL, NULL, 0 },
+/* 0x7b */ { NULL, NULL, 0 },
+/* 0x7c */ { NULL, NULL, 0 },
+/* 0x7d */ { NULL, NULL, 0 },
+/* 0x7e */ { NULL, NULL, 0 },
+/* 0x7f */ { NULL, NULL, 0 },
+/* 0x80 */ { "SMBdskattr", smbsrv_reply_dskattr, NEED_SESS|NEED_TCON },
+/* 0x81 */ { "SMBsearch", smbsrv_reply_search, NEED_SESS|NEED_TCON },
+/* 0x82 */ { "SMBffirst", smbsrv_reply_search, NEED_SESS|NEED_TCON },
+/* 0x83 */ { "SMBfunique", smbsrv_reply_search, NEED_SESS|NEED_TCON },
+/* 0x84 */ { "SMBfclose", smbsrv_reply_fclose, NEED_SESS|NEED_TCON },
+/* 0x85 */ { NULL, NULL, 0 },
+/* 0x86 */ { NULL, NULL, 0 },
+/* 0x87 */ { NULL, NULL, 0 },
+/* 0x88 */ { NULL, NULL, 0 },
+/* 0x89 */ { NULL, NULL, 0 },
+/* 0x8a */ { NULL, NULL, 0 },
+/* 0x8b */ { NULL, NULL, 0 },
+/* 0x8c */ { NULL, NULL, 0 },
+/* 0x8d */ { NULL, NULL, 0 },
+/* 0x8e */ { NULL, NULL, 0 },
+/* 0x8f */ { NULL, NULL, 0 },
+/* 0x90 */ { NULL, NULL, 0 },
+/* 0x91 */ { NULL, NULL, 0 },
+/* 0x92 */ { NULL, NULL, 0 },
+/* 0x93 */ { NULL, NULL, 0 },
+/* 0x94 */ { NULL, NULL, 0 },
+/* 0x95 */ { NULL, NULL, 0 },
+/* 0x96 */ { NULL, NULL, 0 },
+/* 0x97 */ { NULL, NULL, 0 },
+/* 0x98 */ { NULL, NULL, 0 },
+/* 0x99 */ { NULL, NULL, 0 },
+/* 0x9a */ { NULL, NULL, 0 },
+/* 0x9b */ { NULL, NULL, 0 },
+/* 0x9c */ { NULL, NULL, 0 },
+/* 0x9d */ { NULL, NULL, 0 },
+/* 0x9e */ { NULL, NULL, 0 },
+/* 0x9f */ { NULL, NULL, 0 },
+/* 0xa0 */ { "SMBnttrans", smbsrv_reply_nttrans, NEED_SESS|NEED_TCON|LARGE_REQUEST },
+/* 0xa1 */ { "SMBnttranss", smbsrv_reply_nttranss, NEED_SESS|NEED_TCON },
+/* 0xa2 */ { "SMBntcreateX", smbsrv_reply_ntcreate_and_X, NEED_SESS|NEED_TCON|AND_X },
+/* 0xa3 */ { NULL, NULL, 0 },
+/* 0xa4 */ { "SMBntcancel", smbsrv_reply_ntcancel, NEED_SESS|NEED_TCON|SIGNING_NO_REPLY },
+/* 0xa5 */ { "SMBntrename", smbsrv_reply_ntrename, NEED_SESS|NEED_TCON },
+/* 0xa6 */ { NULL, NULL, 0 },
+/* 0xa7 */ { NULL, NULL, 0 },
+/* 0xa8 */ { NULL, NULL, 0 },
+/* 0xa9 */ { NULL, NULL, 0 },
+/* 0xaa */ { NULL, NULL, 0 },
+/* 0xab */ { NULL, NULL, 0 },
+/* 0xac */ { NULL, NULL, 0 },
+/* 0xad */ { NULL, NULL, 0 },
+/* 0xae */ { NULL, NULL, 0 },
+/* 0xaf */ { NULL, NULL, 0 },
+/* 0xb0 */ { NULL, NULL, 0 },
+/* 0xb1 */ { NULL, NULL, 0 },
+/* 0xb2 */ { NULL, NULL, 0 },
+/* 0xb3 */ { NULL, NULL, 0 },
+/* 0xb4 */ { NULL, NULL, 0 },
+/* 0xb5 */ { NULL, NULL, 0 },
+/* 0xb6 */ { NULL, NULL, 0 },
+/* 0xb7 */ { NULL, NULL, 0 },
+/* 0xb8 */ { NULL, NULL, 0 },
+/* 0xb9 */ { NULL, NULL, 0 },
+/* 0xba */ { NULL, NULL, 0 },
+/* 0xbb */ { NULL, NULL, 0 },
+/* 0xbc */ { NULL, NULL, 0 },
+/* 0xbd */ { NULL, NULL, 0 },
+/* 0xbe */ { NULL, NULL, 0 },
+/* 0xbf */ { NULL, NULL, 0 },
+/* 0xc0 */ { "SMBsplopen", smbsrv_reply_printopen, NEED_SESS|NEED_TCON },
+/* 0xc1 */ { "SMBsplwr", smbsrv_reply_printwrite, NEED_SESS|NEED_TCON },
+/* 0xc2 */ { "SMBsplclose", smbsrv_reply_printclose, NEED_SESS|NEED_TCON },
+/* 0xc3 */ { "SMBsplretq", smbsrv_reply_printqueue, NEED_SESS|NEED_TCON },
+/* 0xc4 */ { NULL, NULL, 0 },
+/* 0xc5 */ { NULL, NULL, 0 },
+/* 0xc6 */ { NULL, NULL, 0 },
+/* 0xc7 */ { NULL, NULL, 0 },
+/* 0xc8 */ { NULL, NULL, 0 },
+/* 0xc9 */ { NULL, NULL, 0 },
+/* 0xca */ { NULL, NULL, 0 },
+/* 0xcb */ { NULL, NULL, 0 },
+/* 0xcc */ { NULL, NULL, 0 },
+/* 0xcd */ { NULL, NULL, 0 },
+/* 0xce */ { NULL, NULL, 0 },
+/* 0xcf */ { NULL, NULL, 0 },
+/* 0xd0 */ { "SMBsends", NULL, 0 },
+/* 0xd1 */ { "SMBsendb", NULL, 0 },
+/* 0xd2 */ { "SMBfwdname", NULL, 0 },
+/* 0xd3 */ { "SMBcancelf", NULL, 0 },
+/* 0xd4 */ { "SMBgetmac", NULL, 0 },
+/* 0xd5 */ { "SMBsendstrt", NULL, 0 },
+/* 0xd6 */ { "SMBsendend", NULL, 0 },
+/* 0xd7 */ { "SMBsendtxt", NULL, 0 },
+/* 0xd8 */ { NULL, NULL, 0 },
+/* 0xd9 */ { NULL, NULL, 0 },
+/* 0xda */ { NULL, NULL, 0 },
+/* 0xdb */ { NULL, NULL, 0 },
+/* 0xdc */ { NULL, NULL, 0 },
+/* 0xdd */ { NULL, NULL, 0 },
+/* 0xde */ { NULL, NULL, 0 },
+/* 0xdf */ { NULL, NULL, 0 },
+/* 0xe0 */ { NULL, NULL, 0 },
+/* 0xe1 */ { NULL, NULL, 0 },
+/* 0xe2 */ { NULL, NULL, 0 },
+/* 0xe3 */ { NULL, NULL, 0 },
+/* 0xe4 */ { NULL, NULL, 0 },
+/* 0xe5 */ { NULL, NULL, 0 },
+/* 0xe6 */ { NULL, NULL, 0 },
+/* 0xe7 */ { NULL, NULL, 0 },
+/* 0xe8 */ { NULL, NULL, 0 },
+/* 0xe9 */ { NULL, NULL, 0 },
+/* 0xea */ { NULL, NULL, 0 },
+/* 0xeb */ { NULL, NULL, 0 },
+/* 0xec */ { NULL, NULL, 0 },
+/* 0xed */ { NULL, NULL, 0 },
+/* 0xee */ { NULL, NULL, 0 },
+/* 0xef */ { NULL, NULL, 0 },
+/* 0xf0 */ { NULL, NULL, 0 },
+/* 0xf1 */ { NULL, NULL, 0 },
+/* 0xf2 */ { NULL, NULL, 0 },
+/* 0xf3 */ { NULL, NULL, 0 },
+/* 0xf4 */ { NULL, NULL, 0 },
+/* 0xf5 */ { NULL, NULL, 0 },
+/* 0xf6 */ { NULL, NULL, 0 },
+/* 0xf7 */ { NULL, NULL, 0 },
+/* 0xf8 */ { NULL, NULL, 0 },
+/* 0xf9 */ { NULL, NULL, 0 },
+/* 0xfa */ { NULL, NULL, 0 },
+/* 0xfb */ { NULL, NULL, 0 },
+/* 0xfc */ { NULL, NULL, 0 },
+/* 0xfd */ { NULL, NULL, 0 },
+/* 0xfe */ { NULL, NULL, 0 },
+/* 0xff */ { NULL, NULL, 0 }
+};
+
+/****************************************************************************
+receive a SMB request header from the wire, forming a request_context
+from the result
+****************************************************************************/
+NTSTATUS smbsrv_recv_smb_request(void *private_data, DATA_BLOB blob)
+{
+ struct smbsrv_connection *smb_conn = talloc_get_type(private_data, struct smbsrv_connection);
+ struct smbsrv_request *req;
+ struct timeval cur_time = timeval_current();
+ uint8_t command;
+
+ smb_conn->statistics.last_request_time = cur_time;
+
+ /* see if its a special NBT packet */
+ if (CVAL(blob.data, 0) != 0) {
+ req = smbsrv_init_request(smb_conn);
+ NT_STATUS_HAVE_NO_MEMORY(req);
+
+ ZERO_STRUCT(req->in);
+
+ req->in.buffer = talloc_steal(req, blob.data);
+ req->in.size = blob.length;
+ req->request_time = cur_time;
+
+ smbsrv_reply_special(req);
+ return NT_STATUS_OK;
+ }
+
+ if ((NBT_HDR_SIZE + MIN_SMB_SIZE) > blob.length) {
+ DEBUG(2,("Invalid SMB packet: length %ld\n", (long)blob.length));
+ smbsrv_terminate_connection(smb_conn, "Invalid SMB packet");
+ return NT_STATUS_OK;
+ }
+
+ /* Make sure this is an SMB packet */
+ if (IVAL(blob.data, NBT_HDR_SIZE) != SMB_MAGIC) {
+ DEBUG(2,("Non-SMB packet of length %ld. Terminating connection\n",
+ (long)blob.length));
+ smbsrv_terminate_connection(smb_conn, "Non-SMB packet");
+ return NT_STATUS_OK;
+ }
+
+ req = smbsrv_init_request(smb_conn);
+ NT_STATUS_HAVE_NO_MEMORY(req);
+
+ req->in.buffer = talloc_steal(req, blob.data);
+ req->in.size = blob.length;
+ req->request_time = cur_time;
+ req->chained_fnum = -1;
+ req->in.allocated = req->in.size;
+ req->in.hdr = req->in.buffer + NBT_HDR_SIZE;
+ req->in.vwv = req->in.hdr + HDR_VWV;
+ req->in.wct = CVAL(req->in.hdr, HDR_WCT);
+
+ command = CVAL(req->in.hdr, HDR_COM);
+
+ if (req->in.vwv + VWV(req->in.wct) <= req->in.buffer + req->in.size) {
+ req->in.data = req->in.vwv + VWV(req->in.wct) + 2;
+ req->in.data_size = SVAL(req->in.vwv, VWV(req->in.wct));
+
+ /* special handling for oversize calls. Windows seems
+ to take the maximum of the BCC value and the
+ computed buffer size. This handles oversized writeX
+ calls, and possibly oversized SMBtrans calls */
+ if ((message_flags(command) & LARGE_REQUEST) &&
+ ( !(message_flags(command) & AND_X) ||
+ (req->in.wct < 1 || SVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE)) &&
+ req->in.data_size < req->in.size - PTR_DIFF(req->in.data,req->in.buffer)) {
+ req->in.data_size = req->in.size - PTR_DIFF(req->in.data,req->in.buffer);
+ }
+ }
+
+ if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct > req->in.size) {
+ DEBUG(2,("Invalid SMB word count %d\n", req->in.wct));
+ smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet");
+ return NT_STATUS_OK;
+ }
+
+ if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct + req->in.data_size > req->in.size) {
+ DEBUG(2,("Invalid SMB buffer length count %d\n",
+ (int)req->in.data_size));
+ smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet");
+ return NT_STATUS_OK;
+ }
+
+ req->flags2 = SVAL(req->in.hdr, HDR_FLG2);
+
+ /* fix the bufinfo */
+ smbsrv_setup_bufinfo(req);
+
+ if (!smbsrv_signing_check_incoming(req)) {
+ smbsrv_send_error(req, NT_STATUS_ACCESS_DENIED);
+ return NT_STATUS_OK;
+ }
+
+ command = CVAL(req->in.hdr, HDR_COM);
+ switch_message(command, req);
+ return NT_STATUS_OK;
+}
+
+/****************************************************************************
+return a string containing the function name of a SMB command
+****************************************************************************/
+static const char *smb_fn_name(uint8_t type)
+{
+ const char *unknown_name = "SMBunknown";
+
+ if (smb_messages[type].name == NULL)
+ return unknown_name;
+
+ return smb_messages[type].name;
+}
+
+
+/****************************************************************************
+ Do a switch on the message type and call the specific reply function for this
+message. Unlike earlier versions of Samba the reply functions are responsible
+for sending the reply themselves, rather than returning a size to this function
+The reply functions may also choose to delay the processing by pushing the message
+onto the message queue
+****************************************************************************/
+static void switch_message(int type, struct smbsrv_request *req)
+{
+ int flags;
+ struct smbsrv_connection *smb_conn = req->smb_conn;
+ NTSTATUS status;
+ struct server_id_buf idbuf;
+
+ type &= 0xff;
+
+ errno = 0;
+
+ if (smb_messages[type].fn == NULL) {
+ DEBUG(0,("Unknown message type %d!\n",type));
+ smbsrv_reply_unknown(req);
+ return;
+ }
+
+ flags = smb_messages[type].flags;
+
+ req->tcon = smbsrv_smb_tcon_find(smb_conn, SVAL(req->in.hdr,HDR_TID), req->request_time);
+
+ if (!req->session) {
+ /* setup the user context for this request if it
+ hasn't already been initialised (to cope with SMB
+ chaining) */
+
+ req->session = smbsrv_session_find(req->smb_conn, SVAL(req->in.hdr,HDR_UID), req->request_time);
+ }
+
+ DEBUG(5, ("switch message %s (task_id %s)\n",
+ smb_fn_name(type),
+ server_id_str_buf(req->smb_conn->connection->server_id,
+ &idbuf)));
+
+ /* this must be called before we do any reply */
+ if (flags & SIGNING_NO_REPLY) {
+ smbsrv_signing_no_reply(req);
+ }
+
+ /* see if the vuid is valid */
+ if ((flags & NEED_SESS) && !req->session) {
+ status = NT_STATUS_DOS(ERRSRV, ERRbaduid);
+ /* amazingly, the error code depends on the command */
+ switch (type) {
+ case SMBntcreateX:
+ case SMBntcancel:
+ case SMBulogoffX:
+ break;
+ default:
+ if (req->smb_conn->config.nt_status_support &&
+ req->smb_conn->negotiate.client_caps & CAP_STATUS32) {
+ status = NT_STATUS_INVALID_HANDLE;
+ }
+ break;
+ }
+ /*
+ * TODO:
+ * don't know how to handle smb signing for this case
+ * so just skip the reply
+ */
+ if ((flags & SIGNING_NO_REPLY) &&
+ (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) {
+ DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n",
+ smb_fn_name(type), nt_errstr(status)));
+ talloc_free(req);
+ return;
+ }
+ smbsrv_send_error(req, status);
+ return;
+ }
+
+ /* does this protocol need a valid tree connection? */
+ if ((flags & NEED_TCON) && !req->tcon) {
+ status = NT_STATUS_DOS(ERRSRV, ERRinvnid);
+ /* amazingly, the error code depends on the command */
+ switch (type) {
+ case SMBntcreateX:
+ case SMBntcancel:
+ case SMBtdis:
+ break;
+ default:
+ if (req->smb_conn->config.nt_status_support &&
+ req->smb_conn->negotiate.client_caps & CAP_STATUS32) {
+ status = NT_STATUS_INVALID_HANDLE;
+ }
+ break;
+ }
+ /*
+ * TODO:
+ * don't know how to handle smb signing for this case
+ * so just skip the reply
+ */
+ if ((flags & SIGNING_NO_REPLY) &&
+ (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) {
+ DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n",
+ smb_fn_name(type), nt_errstr(status)));
+ talloc_free(req);
+ return;
+ }
+ smbsrv_send_error(req, status);
+ return;
+ }
+
+ smb_messages[type].fn(req);
+}
+
+/*
+ we call this when first first part of a possibly chained request has been completed
+ and we need to call the 2nd part, if any
+*/
+void smbsrv_chain_reply(struct smbsrv_request *req)
+{
+ uint16_t chain_cmd, chain_offset;
+ uint8_t *vwv, *data;
+ uint16_t wct;
+ uint16_t data_size;
+
+ if (req->in.wct < 2 || req->out.wct < 2) {
+ smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror));
+ return;
+ }
+
+ chain_cmd = CVAL(req->in.vwv, VWV(0));
+ chain_offset = SVAL(req->in.vwv, VWV(1));
+
+ if (chain_cmd == SMB_CHAIN_NONE) {
+ /* end of chain */
+ SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
+ SSVAL(req->out.vwv, VWV(1), 0);
+ smbsrv_send_reply(req);
+ return;
+ }
+
+ if (chain_offset + req->in.hdr >= req->in.buffer + req->in.size) {
+ goto error;
+ }
+
+ wct = CVAL(req->in.hdr, chain_offset);
+ vwv = req->in.hdr + chain_offset + 1;
+
+ if (vwv + VWV(wct) + 2 > req->in.buffer + req->in.size) {
+ goto error;
+ }
+
+ data_size = SVAL(vwv, VWV(wct));
+ data = vwv + VWV(wct) + 2;
+
+ if (data + data_size > req->in.buffer + req->in.size) {
+ goto error;
+ }
+
+ /* all seems legit */
+ req->in.vwv = vwv;
+ req->in.wct = wct;
+ req->in.data = data;
+ req->in.data_size = data_size;
+ req->in.ptr = data;
+
+ /* fix the bufinfo */
+ smbsrv_setup_bufinfo(req);
+
+ req->chain_count++;
+
+ SSVAL(req->out.vwv, VWV(0), chain_cmd);
+ SSVAL(req->out.vwv, VWV(1), req->out.size - NBT_HDR_SIZE);
+
+ /* cleanup somestuff for the next request */
+ DLIST_REMOVE(req->smb_conn->requests, req);
+ talloc_unlink(req, req->ntvfs);
+ req->ntvfs = NULL;
+ talloc_free(req->io_ptr);
+ req->io_ptr = NULL;
+
+ switch_message(chain_cmd, req);
+ return;
+
+error:
+ SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
+ SSVAL(req->out.vwv, VWV(1), 0);
+ smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror));
+}
+
+/*
+ * init the SMB protocol related stuff
+ */
+NTSTATUS smbsrv_init_smb_connection(struct smbsrv_connection *smb_conn, struct loadparm_context *lp_ctx)
+{
+ NTSTATUS status;
+
+ /* now initialise a few default values associated with this smb socket */
+ smb_conn->negotiate.max_send = 0xFFFF;
+
+ /* this is the size that w2k uses, and it appears to be important for
+ good performance */
+ smb_conn->negotiate.max_recv = lpcfg_max_xmit(lp_ctx);
+
+ smb_conn->negotiate.zone_offset = get_time_zone(time(NULL));
+
+ smb_conn->config.nt_status_support = lpcfg_nt_status_support(lp_ctx);
+
+ status = smbsrv_init_sessions(smb_conn, UINT16_MAX);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ status = smbsrv_smb_init_tcons(smb_conn);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ smbsrv_init_signing(smb_conn);
+
+ return NT_STATUS_OK;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 13:01:46 +0000