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wireshark/epan/dissectors/packet-pcnfsd.c
Guy Harris 8ed7a73e22 Fix a bunch of warnings. 
Cast away some implicit 64-bit-to-32-bit conversion errors due to use of
sizeof.

Cast away some implicit 64-bit-to-32-bit conversion errors due to use of
strtol() and strtoul().

Change some data types to avoid those implicit conversion warnings.

When assigning a constant to a float, make sure the constant isn't a
double, by appending "f" to the constant.

Constify a bunch of variables, parameters, and return values to
eliminate warnings due to strings being given const qualifiers.  Cast
away those warnings in some cases where an API we don't control forces
us to do so.

Enable a bunch of additional warnings by default.  Note why at least
some of the other warnings aren't enabled.

randpkt.c and text2pcap.c are used to build programs, so they don't need
to be in EXTRA_DIST.

If the user specifies --enable-warnings-as-errors, add -Werror *even if
the user specified --enable-extra-gcc-flags; assume they know what
they're doing and are willing to have the compile fail due to the extra
GCC warnings being treated as errors.

svn path=/trunk/; revision=46748
2012-12-26 05:57:06 +00:00

448 lines
12 KiB
C
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/* packet-pcnfsd.c
* Routines for PCNFSD dissection
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from packet-ypbind.c
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
Protocol information comes from the book
"NFS Illustrated" by Brent Callaghan, ISBN 0-201-32570-5
*/
#include "config.h"
#include <string.h>
#include "packet-rpc.h"
#include "packet-pcnfsd.h"
static int proto_pcnfsd = -1;
static int hf_pcnfsd_procedure_v1 = -1;
static int hf_pcnfsd_procedure_v2 = -1;
static int hf_pcnfsd_auth_client = -1;
static int hf_pcnfsd_auth_ident_obscure = -1;
static int hf_pcnfsd_auth_ident_clear = -1;
static int hf_pcnfsd_auth_password_obscure = -1;
static int hf_pcnfsd_auth_password_clear = -1;
static int hf_pcnfsd_comment = -1;
static int hf_pcnfsd_status = -1;
static int hf_pcnfsd_uid = -1;
static int hf_pcnfsd_gid = -1;
static int hf_pcnfsd_gids_count = -1;
static int hf_pcnfsd_homedir = -1;
static int hf_pcnfsd_def_umask = -1;
static int hf_pcnfsd_username = -1;
static gint ett_pcnfsd = -1;
static gint ett_pcnfsd_auth_ident = -1;
static gint ett_pcnfsd_auth_password = -1;
static gint ett_pcnfsd_gids = -1;
static int
dissect_pcnfsd_username(tvbuff_t *tvb, int offset, proto_tree *tree)
{
return dissect_rpc_string(tvb, tree, hf_pcnfsd_username, offset, NULL);
}
#define MAP_REQ_UID 0
#define MAP_REQ_GID 1
#define MAP_REQ_UNAME 2
#define MAP_REQ_GNAME 3
static const value_string names_mapreq[] =
{
{ MAP_REQ_UID, "MAP_REQ_UID" },
{ MAP_REQ_GID, "MAP_REQ_GID" },
{ MAP_REQ_UNAME, "MAP_REQ_UNAME" },
{ MAP_REQ_GNAME, "MAP_REQ_GNAME" },
{ 0, NULL }
};
static int
dissect_pcnfsd_mapreq(tvbuff_t *tvb, int offset, proto_tree *tree)
{
guint32 mapreq;
mapreq = tvb_get_ntohl(tvb, offset + 0);
if (tree)
proto_tree_add_text(tree, tvb, offset, 4, "Request: %s (%u)",
val_to_str(mapreq, names_mapreq, "%u"), mapreq);
offset += 4;
return offset;
}
static int
dissect_pcnfsd2_dissect_mapreq_arg_item(tvbuff_t *tvb, int offset,
packet_info *pinfo _U_, proto_tree *tree)
{
offset = dissect_pcnfsd_mapreq(tvb, offset, tree);
offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
offset = dissect_pcnfsd_username(tvb, offset, tree);
return offset;
}
static int
dissect_pcnfsd2_mapid_call(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree)
{
offset = dissect_rpc_string(tvb, tree, hf_pcnfsd_comment, offset, NULL);
offset = dissect_rpc_list(tvb, pinfo, tree, offset,
dissect_pcnfsd2_dissect_mapreq_arg_item);
return offset;
}
#define MAP_RES_OK 0
#define MAP_RES_UNKNOWN 1
#define MAP_RES_DENIED 2
static const value_string names_maprstat[] =
{
{ MAP_RES_OK, "MAP_RES_OK" },
{ MAP_RES_UNKNOWN, "MAP_RES_UNKNOWN" },
{ MAP_RES_DENIED, "MAP_RES_DENIED" },
{ 0, NULL }
};
static int
dissect_pcnfsd2_dissect_mapreq_res_item(tvbuff_t *tvb, int offset,
packet_info *pinfo _U_, proto_tree *tree)
{
guint32 maprstat;
offset = dissect_pcnfsd_mapreq(tvb, offset, tree);
maprstat = tvb_get_ntohl(tvb, offset + 0);
if (tree)
proto_tree_add_text(tree, tvb, offset, 4, "Status: %s (%u)",
val_to_str(maprstat, names_maprstat, "%u"), maprstat);
offset += 4;
offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
offset = dissect_pcnfsd_username(tvb, offset, tree);
return offset;
}
static int
dissect_pcnfsd2_mapid_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree)
{
offset = dissect_rpc_string(tvb, tree, hf_pcnfsd_comment, offset, NULL);
offset = dissect_rpc_list(tvb, pinfo, tree, offset,
dissect_pcnfsd2_dissect_mapreq_res_item);
return offset;
}
/* "NFS Illustrated 14.7.13 */
static char *
pcnfsd_decode_obscure(const char* data, int len)
{
char *decoded_buf;
char *decoded_data;
decoded_buf = ep_alloc(len);
decoded_data = decoded_buf;
for ( ; len>0 ; len--, data++, decoded_data++) {
*decoded_data = (*data ^ 0x5b) & 0x7f;
}
return decoded_buf;
}
/* "NFS Illustrated" 14.7.13 */
static int
dissect_pcnfsd2_auth_call(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
int newoffset;
const char *ident = NULL;
const char *ident_decoded;
proto_item *ident_item = NULL;
proto_tree *ident_tree = NULL;
const char *password = NULL;
proto_item *password_item = NULL;
proto_tree *password_tree = NULL;
offset = dissect_rpc_string(tvb, tree,
hf_pcnfsd_auth_client, offset, NULL);
if (tree) {
ident_item = proto_tree_add_text(tree, tvb,
offset, -1, "Authentication Ident");
if (ident_item)
ident_tree = proto_item_add_subtree(
ident_item, ett_pcnfsd_auth_ident);
}
newoffset = dissect_rpc_string(tvb, ident_tree,
hf_pcnfsd_auth_ident_obscure, offset, &ident);
if (ident_item) {
proto_item_set_len(ident_item, newoffset-offset);
}
if (ident) {
/* Only attempt to decode the ident if it has been specified */
if (strcmp(ident, RPC_STRING_EMPTY) != 0)
ident_decoded = pcnfsd_decode_obscure(ident, (int)strlen(ident));
else
ident_decoded = ident;
if (ident_tree)
proto_tree_add_string(ident_tree,
hf_pcnfsd_auth_ident_clear,
tvb, offset+4, (gint)strlen(ident_decoded), ident_decoded);
}
if (ident_item) {
proto_item_set_text(ident_item, "Authentication Ident: %s",
ident);
}
offset = newoffset;
if (tree) {
password_item = proto_tree_add_text(tree, tvb,
offset, -1, "Authentication Password");
if (password_item)
password_tree = proto_item_add_subtree(
password_item, ett_pcnfsd_auth_password);
}
newoffset = dissect_rpc_string(tvb, password_tree,
hf_pcnfsd_auth_password_obscure, offset, &password);
if (password_item) {
proto_item_set_len(password_item, newoffset-offset);
}
if (password) {
/* Only attempt to decode the password if it has been specified */
if (strcmp(password, RPC_STRING_EMPTY))
pcnfsd_decode_obscure(password, (int)strlen(password));
if (password_tree)
proto_tree_add_string(password_tree,
hf_pcnfsd_auth_password_clear,
tvb, offset+4, (gint)strlen(password), password);
}
if (password_item) {
proto_item_set_text(password_item, "Authentication Password: %s",
password);
}
offset = newoffset;
offset = dissect_rpc_string(tvb, tree,
hf_pcnfsd_comment, offset, NULL);
return offset;
}
/* "NFS Illustrated" 14.7.13 */
static int
dissect_pcnfsd2_auth_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
int gids_count;
proto_item *gitem = NULL;
proto_tree *gtree = NULL;
int gids_i;
offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_status, offset);
offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_gid, offset);
gids_count = tvb_get_ntohl(tvb,offset+0);
if (tree) {
gitem = proto_tree_add_text(tree, tvb,
offset, 4+gids_count*4, "Group IDs: %d", gids_count);
gtree = proto_item_add_subtree(gitem, ett_pcnfsd_gids);
}
if (gtree) {
proto_tree_add_item(gtree, hf_pcnfsd_gids_count, tvb, offset, 4, ENC_BIG_ENDIAN);
}
offset += 4;
for (gids_i = 0 ; gids_i < gids_count ; gids_i++) {
offset = dissect_rpc_uint32(tvb, gtree,
hf_pcnfsd_gid, offset);
}
offset = dissect_rpc_string(tvb, tree,
hf_pcnfsd_homedir, offset, NULL);
/* should be signed int32 */
offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_def_umask, offset);
offset = dissect_rpc_string(tvb, tree,
hf_pcnfsd_comment, offset, NULL);
return offset;
}
/* "NFS Illustrated", 14.6 */
/* proc number, "proc name", dissect_request, dissect_reply */
/* NULL as function pointer means: type of arguments is "void". */
static const vsff pcnfsd1_proc[] = {
{ 0, "NULL", NULL, NULL },
{ 1, "AUTH", NULL, NULL },
{ 2, "PR_INIT", NULL, NULL },
{ 3, "PR_START", NULL, NULL },
{ 0, NULL, NULL, NULL }
};
static const value_string pcnfsd1_proc_vals[] = {
{ 0, "NULL" },
{ 1, "AUTH" },
{ 2, "PR_INIT" },
{ 3, "PR_START" },
{ 0, NULL }
};
/* end of PCNFS version 1 */
/* "NFS Illustrated", 14.7 */
static const vsff pcnfsd2_proc[] = {
{ 0, "NULL", NULL, NULL },
{ 1, "INFO", NULL, NULL },
{ 2, "PR_INIT", NULL, NULL },
{ 3, "PR_START", NULL, NULL },
{ 4, "PR_LIST", NULL, NULL },
{ 5, "PR_QUEUE", NULL, NULL },
{ 6, "PR_STATUS", NULL, NULL },
{ 7, "PR_CANCEL", NULL, NULL },
{ 8, "PR_ADMIN", NULL, NULL },
{ 9, "PR_REQUEUE", NULL, NULL },
{ 10, "PR_HOLD", NULL, NULL },
{ 11, "PR_RELEASE", NULL, NULL },
{ 12, "MAPID",
dissect_pcnfsd2_mapid_call, dissect_pcnfsd2_mapid_reply },
{ 13, "AUTH",
dissect_pcnfsd2_auth_call, dissect_pcnfsd2_auth_reply },
{ 14, "ALERT", NULL, NULL },
{ 0, NULL, NULL, NULL }
};
static const value_string pcnfsd2_proc_vals[] = {
{ 0, "NULL" },
{ 1, "INFO" },
{ 2, "PR_INIT" },
{ 3, "PR_START" },
{ 4, "PR_LIST" },
{ 5, "PR_QUEUE" },
{ 6, "PR_STATUS" },
{ 7, "PR_CANCEL" },
{ 8, "PR_ADMIN" },
{ 9, "PR_REQUEUE" },
{ 10, "PR_HOLD" },
{ 11, "PR_RELEASE" },
{ 12, "MAPID" },
{ 13, "AUTH" },
{ 14, "ALERT" },
{ 0, NULL }
};
/* end of PCNFS version 2 */
void
proto_register_pcnfsd(void)
{
static hf_register_info hf[] = {
{ &hf_pcnfsd_procedure_v1, {
"V1 Procedure", "pcnfsd.procedure_v1", FT_UINT32, BASE_DEC,
VALS(pcnfsd1_proc_vals), 0, NULL, HFILL }},
{ &hf_pcnfsd_procedure_v2, {
"V2 Procedure", "pcnfsd.procedure_v2", FT_UINT32, BASE_DEC,
VALS(pcnfsd2_proc_vals), 0, NULL, HFILL }},
{ &hf_pcnfsd_auth_client, {
"Authentication Client", "pcnfsd.auth.client", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_pcnfsd_auth_ident_obscure, {
"Obscure Ident", "pcnfsd.auth.ident.obscure", FT_STRING, BASE_NONE,
NULL, 0, "Authentication Obscure Ident", HFILL }},
{ &hf_pcnfsd_auth_ident_clear, {
"Clear Ident", "pcnfsd.auth.ident.clear", FT_STRING, BASE_NONE,
NULL, 0, "Authentication Clear Ident", HFILL }},
{ &hf_pcnfsd_auth_password_obscure, {
"Obscure Password", "pcnfsd.auth.password.obscure", FT_STRING, BASE_NONE,
NULL, 0, "Authentication Obscure Password", HFILL }},
{ &hf_pcnfsd_auth_password_clear, {
"Clear Password", "pcnfsd.auth.password.clear", FT_STRING, BASE_NONE,
NULL, 0, "Authentication Clear Password", HFILL }},
{ &hf_pcnfsd_comment, {
"Comment", "pcnfsd.comment", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_pcnfsd_status, {
"Reply Status", "pcnfsd.status", FT_UINT32, BASE_DEC,
NULL, 0, "Status", HFILL }},
{ &hf_pcnfsd_uid, {
"User ID", "pcnfsd.uid", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_pcnfsd_gid, {
"Group ID", "pcnfsd.gid", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_pcnfsd_gids_count, {
"Group ID Count", "pcnfsd.gids.count", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_pcnfsd_homedir, {
"Home Directory", "pcnfsd.homedir", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_pcnfsd_def_umask, {
"def_umask", "pcnfsd.def_umask", FT_UINT32, BASE_OCT,
NULL, 0, NULL, HFILL }},
{ &hf_pcnfsd_username, {
"User name", "pcnfsd.username", FT_STRING, BASE_NONE,
NULL, 0, "pcnfsd.username", HFILL }},
};
static gint *ett[] = {
&ett_pcnfsd,
&ett_pcnfsd_auth_ident,
&ett_pcnfsd_auth_password,
&ett_pcnfsd_gids
};
proto_pcnfsd = proto_register_protocol("PC NFS",
"PCNFSD", "pcnfsd");
proto_register_field_array(proto_pcnfsd, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_pcnfsd(void)
{
/* Register the protocol as RPC */
rpc_init_prog(proto_pcnfsd, PCNFSD_PROGRAM, ett_pcnfsd);
/* Register the procedure tables */
rpc_init_proc_table(PCNFSD_PROGRAM, 1, pcnfsd1_proc, hf_pcnfsd_procedure_v1);
rpc_init_proc_table(PCNFSD_PROGRAM, 2, pcnfsd2_proc, hf_pcnfsd_procedure_v2);
}
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