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|
/* packet-nfsacl.c
* Stubs for Sun's NFS ACL RPC service (runs on port 2049, and is presumably
* handled by the same kernel server code that handles NFS)
*
* Guy Harris <guy@alum.mit.edu>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include "packet-nfs.h"
void proto_register_nfsacl(void);
void proto_reg_handoff_nfsacl(void);
static int proto_nfsacl = -1;
static int hf_nfsacl_mask = -1;
static int hf_nfsacl_mask_acl_entry = -1;
static int hf_nfsacl_mask_acl_count = -1;
static int hf_nfsacl_mask_default_acl_entry = -1;
static int hf_nfsacl_mask_default_acl_count = -1;
static int hf_nfsacl_procedure_v1 = -1;
static int hf_nfsacl_procedure_v2 = -1;
static int hf_nfsacl_procedure_v3 = -1;
static int hf_nfsacl_entry = -1;
static int hf_nfsacl_aclcnt = -1;
static int hf_nfsacl_dfaclcnt = -1;
static int hf_nfsacl_aclent = -1;
static int hf_nfsacl_aclent_type = -1;
static int hf_nfsacl_aclent_uid = -1;
static int hf_nfsacl_aclent_perm = -1;
static int hf_nfsacl_aclent_perm_read = -1;
static int hf_nfsacl_aclent_perm_write = -1;
static int hf_nfsacl_aclent_perm_exec = -1;
static int hf_nfsacl_create = -1;
static gint ett_nfsacl = -1;
static gint ett_nfsacl_mask = -1;
static gint ett_nfsacl_entry = -1;
static gint ett_nfsacl_aclent = -1;
static gint ett_nfsacl_aclent_perm = -1;
static gint ett_nfsacl_aclent_entries = -1;
#define NFSACL_PROGRAM 100227
#define NFSACLPROC_NULL 0
#define NFSACLPROC2_GETACL 1
#define NFSACLPROC2_SETACL 2
#define NFSACLPROC2_GETATTR 3
#define NFSACLPROC2_ACCESS 4
#define NFSACLPROC2_GETXATTRDIR 5
#define NFSACLPROC3_GETACL 1
#define NFSACLPROC3_SETACL 2
#define NFSACLPROC3_GETXATTRDIR 3
#define ACL2_OK 0
#define ACL3_OK 0
static int
dissect_nfsacl_mask(tvbuff_t *tvb, int offset, proto_tree *tree)
{
proto_item *mask_item;
proto_tree *mask_tree;
if (tree)
{
mask_item = proto_tree_add_item(tree, hf_nfsacl_mask, tvb, offset, 4, ENC_BIG_ENDIAN);
mask_tree = proto_item_add_subtree(mask_item, ett_nfsacl_mask);
proto_tree_add_item(mask_tree, hf_nfsacl_mask_acl_entry, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(mask_tree, hf_nfsacl_mask_acl_count, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(mask_tree, hf_nfsacl_mask_default_acl_entry, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(mask_tree, hf_nfsacl_mask_default_acl_count, tvb, offset, 4, ENC_BIG_ENDIAN);
}
offset += 4;
return offset;
}
#define NA_READ 0x4
#define NA_WRITE 0x2
#define NA_EXEC 0x1
static const value_string names_nfsacl_aclent_type[] = {
#define NA_USER_OBJ 0x1
{ NA_USER_OBJ, "NA_USER_OBJ" },
#define NA_USER 0x2
{ NA_USER, "NA_USER" },
#define NA_GROUP_OBJ 0x4
{ NA_GROUP_OBJ, "NA_GROUP_OBJ" },
#define NA_GROUP 0x8
{ NA_GROUP, "NA_GROUP" },
#define NA_CLASS_OBJ 0x10
{ NA_CLASS_OBJ, "NA_CLASS_OBJ" },
#define NA_OTHER_OBJ 0x20
{ NA_OTHER_OBJ, "NA_OTHER_OBJ" },
#define NA_ACL_DEFAULT 0x1000
{ NA_ACL_DEFAULT, "NA_ACL_DEFAULT" },
{ NA_ACL_DEFAULT | NA_USER_OBJ, "Default NA_USER_OBJ" },
{ NA_ACL_DEFAULT | NA_USER, "Default NA_USER" },
{ NA_ACL_DEFAULT | NA_GROUP_OBJ, "Default NA_GROUP_OBJ" },
{ NA_ACL_DEFAULT | NA_GROUP, "Default NA_GROUP" },
{ NA_ACL_DEFAULT | NA_CLASS_OBJ, "Default NA_CLASS_OBJ" },
{ NA_ACL_DEFAULT | NA_OTHER_OBJ, "Default NA_OTHER_OBJ" },
{ 0, NULL },
};
static int
dissect_nfsacl_aclent(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree* tree)
{
proto_item *entry_item = NULL;
proto_tree *entry_tree = NULL;
proto_item *perm_item = NULL;
proto_tree *perm_tree = NULL;
if (tree)
{
entry_item = proto_tree_add_item(tree, hf_nfsacl_aclent, tvb,
offset + 0, -1, ENC_NA);
entry_tree = proto_item_add_subtree(entry_item, ett_nfsacl_aclent);
}
offset = dissect_rpc_uint32(tvb, entry_tree, hf_nfsacl_aclent_type, offset);
offset = dissect_rpc_uint32(tvb, entry_tree, hf_nfsacl_aclent_uid, offset);
perm_item = proto_tree_add_item(entry_tree, hf_nfsacl_aclent_perm,
tvb, offset, 4, ENC_BIG_ENDIAN);
perm_tree = proto_item_add_subtree(perm_item, ett_nfsacl_aclent_perm);
proto_tree_add_item(perm_tree, hf_nfsacl_aclent_perm_read, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(perm_tree, hf_nfsacl_aclent_perm_write, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(perm_tree, hf_nfsacl_aclent_perm_exec, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
return offset;
}
static int
dissect_nfsacl_secattr(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
guint32 aclcnt, dfaclcnt;
guint32 i;
proto_tree *entry_tree;
offset = dissect_nfsacl_mask(tvb, offset, tree);
offset = dissect_rpc_uint32(tvb, tree, hf_nfsacl_aclcnt, offset);
aclcnt = tvb_get_ntohl(tvb, offset);
entry_tree = proto_tree_add_subtree_format(tree, tvb, offset, 4,
ett_nfsacl_aclent_entries, NULL, "Total ACL entries: %d", aclcnt);
offset += 4;
if (aclcnt > 0)
{
for (i = 0; i < aclcnt; i++)
offset = dissect_nfsacl_aclent(tvb, offset, pinfo, entry_tree);
}
/* */
offset = dissect_rpc_uint32(tvb, tree, hf_nfsacl_dfaclcnt, offset);
dfaclcnt = tvb_get_ntohl(tvb, offset);
entry_tree = proto_tree_add_subtree_format(tree, tvb, offset, 4,
ett_nfsacl_aclent_entries, NULL, "Total default ACL entries: %d", dfaclcnt);
offset += 4;
if (dfaclcnt > 0)
{
for (i = 0; i < dfaclcnt; i++)
offset = dissect_nfsacl_aclent(tvb, offset, pinfo, entry_tree);
}
return offset;
}
/* proc number, "proc name", dissect_request, dissect_reply */
static const vsff nfsacl1_proc[] = {
{ NFSACLPROC_NULL, "NULL",
dissect_rpc_void, dissect_rpc_void },
{ 0, NULL, NULL, NULL }
};
static const value_string nfsacl1_proc_vals[] = {
{ NFSACLPROC_NULL, "NULL" },
{ 0, NULL }
};
static int
dissect_nfsacl2_getacl_call(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data)
{
int offset = 0;
offset = dissect_fhandle(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
offset = dissect_nfsacl_mask(tvb, offset, tree);
return offset;
}
static int
dissect_nfsacl2_getacl_reply(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data _U_)
{
guint32 status;
int offset = 0;
proto_tree_add_item_ret_uint(tree, hf_nfs_status, tvb, offset, 4, ENC_BIG_ENDIAN, &status);
offset += 4;
if (status == ACL2_OK)
{
offset = dissect_nfs2_fattr(tvb, offset, tree, "attr");
offset = dissect_nfsacl_secattr(tvb, offset, pinfo, tree);
}
return offset;
}
static int
dissect_nfsacl2_setacl_call(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data)
{
int offset = 0;
offset = dissect_fhandle(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
offset = dissect_nfsacl_secattr(tvb, offset, pinfo, tree);
return offset;
}
static int
dissect_nfsacl2_setacl_reply(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data _U_)
{
guint32 status;
int offset = 0;
proto_tree_add_item_ret_uint(tree, hf_nfs_status, tvb, offset + 0, 4, ENC_BIG_ENDIAN, &status);
offset += 4;
if (status == ACL2_OK)
offset = dissect_nfs2_fattr(tvb, offset, tree, "attr");
return offset;
}
static int
dissect_nfsacl2_getattr_call(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data)
{
return dissect_fhandle(tvb, 0, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
}
static int
dissect_nfsacl2_getattr_reply(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data _U_)
{
return dissect_nfs2_fattr(tvb, 0, tree, "attr");
}
static int
dissect_nfsacl2_access_call(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data)
{
guint32 *acc_request, amask;
rpc_call_info_value *civ = (rpc_call_info_value*)data;
int offset = 0;
offset = dissect_fhandle(tvb, offset, pinfo, tree, "fhandle", NULL, civ);
/* Get access mask to check and save it for comparison to the access reply. */
amask = tvb_get_ntohl(tvb, offset);
acc_request = (guint32 *)wmem_memdup(wmem_file_scope(), &amask, sizeof(guint32));
civ->private_data = acc_request;
display_access_items(tvb, offset, pinfo, tree, amask, 'C', 3, NULL, "Check") ;
offset+=4;
return offset;
}
static int
dissect_nfsacl2_access_reply(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data)
{
guint32 status;
int offset = 0;
status = tvb_get_ntohl(tvb, offset + 0);
proto_tree_add_uint(tree, hf_nfs_status, tvb, offset + 0, 4, status);
offset += 4;
if (status == ACL2_OK)
{
offset = dissect_nfs2_fattr(tvb, offset, tree, "attr");
offset = dissect_access_reply(tvb, offset, pinfo, tree, 3, NULL, (rpc_call_info_value*)data);
}
return offset;
}
static int
dissect_nfsacl2_getxattrdir_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data)
{
int offset = 0;
offset = dissect_fhandle(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
offset = dissect_rpc_bool(tvb, tree, hf_nfsacl_create, offset);
return offset;
}
static int
dissect_nfsacl2_getxattrdir_reply(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data)
{
guint32 status;
int offset = 0;
status = tvb_get_ntohl(tvb, offset + 0);
proto_tree_add_uint(tree, hf_nfs_status, tvb, offset + 0, 4, status);
offset += 4;
if (status == ACL2_OK)
{
offset = dissect_fhandle(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
offset = dissect_nfs2_fattr(tvb, offset, tree, "attr");
}
return offset;
}
static const vsff nfsacl2_proc[] = {
{ NFSACLPROC_NULL, "NULL",
dissect_rpc_void, dissect_rpc_void },
{ NFSACLPROC2_GETACL, "GETACL",
dissect_nfsacl2_getacl_call, dissect_nfsacl2_getacl_reply },
{ NFSACLPROC2_SETACL, "SETACL",
dissect_nfsacl2_setacl_call, dissect_nfsacl2_setacl_reply },
{ NFSACLPROC2_GETATTR, "GETATTR",
dissect_nfsacl2_getattr_call, dissect_nfsacl2_getattr_reply },
{ NFSACLPROC2_ACCESS, "ACCESS",
dissect_nfsacl2_access_call, dissect_nfsacl2_access_reply },
{ NFSACLPROC2_GETXATTRDIR, "GETXATTRDIR",
dissect_nfsacl2_getxattrdir_call, dissect_nfsacl2_getxattrdir_reply },
{ 0, NULL, NULL, NULL }
};
static const value_string nfsacl2_proc_vals[] = {
{ NFSACLPROC_NULL, "NULL" },
{ NFSACLPROC2_GETACL, "GETACL" },
{ NFSACLPROC2_SETACL, "SETACL" },
{ NFSACLPROC2_GETATTR, "GETATTR" },
{ NFSACLPROC2_ACCESS, "ACCESS" },
{ NFSACLPROC2_GETXATTRDIR, "GETXATTRDIR" },
{ 0, NULL }
};
static int
dissect_nfsacl3_getacl_call(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data)
{
int offset = 0;
offset = dissect_nfs3_fh(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
offset = dissect_nfsacl_mask(tvb, offset, tree);
return offset;
}
static int
dissect_nfsacl3_getacl_reply(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data _U_)
{
guint32 status;
proto_item *entry_item;
proto_tree *entry_tree;
int offset = 0;
proto_tree_add_item_ret_uint(tree, hf_nfs_status, tvb, offset, 4, ENC_BIG_ENDIAN, &status);
offset += 4;
entry_item = proto_tree_add_item(tree, hf_nfsacl_entry, tvb,
offset + 0, -1, ENC_NA);
entry_tree = proto_item_add_subtree(entry_item, ett_nfsacl_entry);
offset = dissect_nfs3_post_op_attr(tvb, offset, pinfo, entry_tree, "attr");
if (status != ACL3_OK)
return offset;
offset = dissect_nfsacl_secattr(tvb, offset, pinfo, entry_tree);
return offset;
}
static int
dissect_nfsacl3_setacl_call(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data)
{
proto_item *acl_item;
proto_tree *acl_tree;
int offset = 0;
offset = dissect_nfs3_fh(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
acl_item = proto_tree_add_item(tree, hf_nfsacl_entry, tvb, offset + 0,
-1, ENC_NA);
acl_tree = proto_item_add_subtree(acl_item, ett_nfsacl_entry);
offset = dissect_nfsacl_secattr(tvb, offset, pinfo, acl_tree);
return offset;
}
static int
dissect_nfsacl3_setacl_reply(tvbuff_t *tvb, packet_info *pinfo _U_,
proto_tree *tree, void* data _U_)
{
guint32 status;
int offset = 0;
proto_tree_add_item_ret_uint(tree, hf_nfs_status, tvb, offset, 4, ENC_BIG_ENDIAN, &status);
offset += 4;
offset = dissect_nfs3_post_op_attr(tvb, offset, pinfo, tree, "attr");
return offset;
}
static int
dissect_nfsacl3_getxattrdir_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data)
{
int offset = 0;
offset = dissect_nfs3_fh(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
offset = dissect_rpc_bool(tvb, tree, hf_nfsacl_create, offset);
return offset;
}
static int
dissect_nfsacl3_getxattrdir_reply(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data)
{
guint32 status;
int offset = 0;
proto_tree_add_item_ret_uint(tree, hf_nfs_status, tvb, offset, 4, ENC_BIG_ENDIAN, &status);
offset += 4;
if (status == ACL3_OK)
{
offset = dissect_nfs3_fh(tvb, offset, pinfo, tree, "fhandle", NULL, (rpc_call_info_value*)data);
offset = dissect_nfs3_post_op_attr(tvb, offset, pinfo, tree, "attr");
}
return offset;
}
static const vsff nfsacl3_proc[] = {
{ NFSACLPROC_NULL, "NULL",
dissect_rpc_void, dissect_rpc_void },
{ NFSACLPROC3_GETACL, "GETACL",
dissect_nfsacl3_getacl_call, dissect_nfsacl3_getacl_reply },
{ NFSACLPROC3_SETACL, "SETACL",
dissect_nfsacl3_setacl_call, dissect_nfsacl3_setacl_reply },
{ NFSACLPROC3_GETXATTRDIR, "GETXATTRDIR",
dissect_nfsacl3_getxattrdir_call, dissect_nfsacl3_getxattrdir_reply },
{ 0, NULL, NULL, NULL }
};
static const value_string nfsacl3_proc_vals[] = {
{ NFSACLPROC_NULL, "NULL" },
{ NFSACLPROC3_GETACL, "GETACL" },
{ NFSACLPROC3_SETACL, "SETACL" },
{ NFSACLPROC3_GETXATTRDIR, "GETXATTRDIR" },
{ 0, NULL }
};
static const rpc_prog_vers_info nfsacl_vers_info[] = {
{ 1, nfsacl1_proc, &hf_nfsacl_procedure_v1 },
{ 2, nfsacl2_proc, &hf_nfsacl_procedure_v2 },
{ 3, nfsacl3_proc, &hf_nfsacl_procedure_v3 },
};
void
proto_register_nfsacl(void)
{
static hf_register_info hf[] = {
{ &hf_nfsacl_mask, {
"Mask", "nfsacl.mask", FT_UINT32, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_nfsacl_mask_acl_entry, {
"ACL entry", "nfsacl.mask.acl_entry", FT_BOOLEAN, 32,
TFS(&tfs_yes_no), 0x00000001, NULL, HFILL }},
{ &hf_nfsacl_mask_acl_count, {
"ACL count", "nfsacl.mask.acl_count", FT_BOOLEAN, 32,
TFS(&tfs_yes_no), 0x00000002, NULL, HFILL }},
{ &hf_nfsacl_mask_default_acl_entry, {
"Default ACL entry", "nfsacl.mask.default_acl_entry", FT_BOOLEAN, 32,
TFS(&tfs_yes_no), 0x00000004, NULL, HFILL }},
{ &hf_nfsacl_mask_default_acl_count, {
"Default ACL count", "nfsacl.mask.default_acl_count", FT_BOOLEAN, 32,
TFS(&tfs_yes_no), 0x00000008, NULL, HFILL }},
{ &hf_nfsacl_procedure_v1, {
"V1 Procedure", "nfsacl.procedure_v1", FT_UINT32, BASE_DEC,
VALS(nfsacl1_proc_vals), 0, NULL, HFILL }},
{ &hf_nfsacl_procedure_v2, {
"V2 Procedure", "nfsacl.procedure_v2", FT_UINT32, BASE_DEC,
VALS(nfsacl2_proc_vals), 0, NULL, HFILL }},
{ &hf_nfsacl_procedure_v3, {
"V3 Procedure", "nfsacl.procedure_v3", FT_UINT32, BASE_DEC,
VALS(nfsacl3_proc_vals), 0, NULL, HFILL }},
/* generic */
{ &hf_nfsacl_entry, {
"ACL", "nfsacl.acl", FT_NONE, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_nfsacl_aclcnt, {
"ACL count", "nfsacl.aclcnt", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_nfsacl_dfaclcnt, {
"Default ACL count", "nfsacl.dfaclcnt", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_nfsacl_aclent, {
"ACL Entry", "nfsacl.aclent", FT_NONE, BASE_NONE,
NULL, 0, "ACL", HFILL }},
{ &hf_nfsacl_aclent_type, {
"Type", "nfsacl.aclent.type", FT_UINT32, BASE_DEC,
VALS(names_nfsacl_aclent_type), 0, NULL, HFILL }},
{ &hf_nfsacl_aclent_uid, {
"UID", "nfsacl.aclent.uid", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_nfsacl_aclent_perm, {
"Permissions", "nfsacl.aclent.perm", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_nfsacl_aclent_perm_read, {
"READ", "nfsacl.aclent.perm.read", FT_BOOLEAN, 32,
TFS(&tfs_yes_no), NA_READ, NULL, HFILL }},
{ &hf_nfsacl_aclent_perm_write, {
"WRITE", "nfsacl.aclent.perm.write", FT_BOOLEAN, 32,
TFS(&tfs_yes_no), NA_WRITE, NULL, HFILL }},
{ &hf_nfsacl_aclent_perm_exec, {
"EXEC", "nfsacl.aclent.perm.exec", FT_BOOLEAN, 32,
TFS(&tfs_yes_no), NA_EXEC, NULL, HFILL }},
/* V2 */
{ &hf_nfsacl_create, {
"create", "nfsacl.create", FT_BOOLEAN, BASE_NONE,
TFS(&tfs_yes_no), 0x0, "Create?", HFILL }},
};
static gint *ett[] = {
&ett_nfsacl,
&ett_nfsacl_mask,
&ett_nfsacl_entry,
&ett_nfsacl_aclent,
&ett_nfsacl_aclent_perm,
&ett_nfsacl_aclent_entries
};
proto_nfsacl = proto_register_protocol("NFSACL", "NFSACL", "nfsacl");
proto_register_field_array(proto_nfsacl, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_nfsacl(void)
{
/* Register the protocol as RPC */
rpc_init_prog(proto_nfsacl, NFSACL_PROGRAM, ett_nfsacl,
G_N_ELEMENTS(nfsacl_vers_info), nfsacl_vers_info);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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