/* packet-ypserv.c
 * Routines for ypserv dissection
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * Copied from packet-smb.c
 *
 * 2001 Ronnie Sahlberg <See AUTHORS for email>
 *   Added all remaining dissectors for this protocol
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"

#include "packet-rpc.h"
#include "packet-ypserv.h"

void proto_register_ypserv(void);
void proto_reg_handoff_ypserv(void);

static int proto_ypserv;
static int hf_ypserv_procedure_v1;
static int hf_ypserv_procedure_v2;
static int hf_ypserv_domain;
static int hf_ypserv_servesdomain;
static int hf_ypserv_map;
static int hf_ypserv_key;
static int hf_ypserv_peer;
static int hf_ypserv_more;
static int hf_ypserv_ordernum;
static int hf_ypserv_transid;
static int hf_ypserv_prog;
static int hf_ypserv_port;
static int hf_ypserv_value;
static int hf_ypserv_status;
static int hf_ypserv_map_parms;
static int hf_ypserv_xfrstat;

static gint ett_ypserv;
static gint ett_ypserv_map_parms;

static const value_string ypstat[] =
{
	{	1,	"YP_TRUE"	},
	{	2,	"YP_NOMORE"	},
	{	0,	"YP_FALSE"	},
	{	-1,	"YP_NOMAP"	},
	{	-2,	"YP_NODOM"	},
	{	-3,	"YP_NOKEY"	},
	{	-4,	"YP_BADOP"	},
	{	-5,	"YP_BADDB"	},
	{	-6,	"YP_YPERR"	},
	{	-7,	"YP_BADARGS"	},
	{	-8,	"YP_VERS"	},
	{	0,	NULL	},
};

static const value_string xfrstat[] =
{
	{	1,	"YPXFR_SUCC"	},
	{	2,	"YPXFR_AGE"	},
	{	-1,	"YPXFR_NOMAP"	},
	{	-2,	"YPXFR_NODOM"	},
	{	-3,	"YPXFR_RSRC"	},
	{	-4,	"YPXFR_RPC"	},
	{	-5,	"YPXFR_MADDR"	},
	{	-6,	"YPXFR_YPERR"	},
	{	-7,	"YPXFR_BADARGS"	},
	{	-8,	"YPXFR_DBM"	},
	{	-9,	"YPXFR_FILE"	},
	{	-10,	"YPXFR_SKEW"	},
	{	-11,	"YPXFR_CLEAR"	},
	{	-12,	"YPXFR_FORCE"	},
	{	-13,	"YPXFR_XFRERR"	},
	{	-14,	"YPXFR_REFUSED"	},
	{	0,	NULL	},
};

static int
dissect_ypserv_status(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, gint32 *rstatus)
{
	gint32 status;
	const char *err;

	status=tvb_get_ntohl(tvb, offset);
	if(rstatus){
		*rstatus=status;
	}
	offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_status, offset);

	if(status<0){
		err=val_to_str(status, ypstat, "Unknown error:%u");
		col_append_fstr(pinfo->cinfo, COL_INFO," %s", err);

		proto_item_append_text(tree, " Error:%s", err);
	}

	return offset;
}

static int
dissect_domain_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	proto_item_append_text(tree, " DOMAIN call");

	return dissect_rpc_string(tvb,tree,hf_ypserv_domain,0,NULL);
}

static int
dissect_domain_nonack_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	proto_item_append_text(tree, " DOMAIN_NONACK call");

	return dissect_rpc_string(tvb,tree,hf_ypserv_domain,0,NULL);
}

static int
dissect_maplist_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	proto_item_append_text(tree, " MAPLIST call");

	return dissect_rpc_string(tvb,tree,hf_ypserv_domain,0,NULL);
}

static int
dissect_domain_reply(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " DOMAIN reply");

	proto_tree_add_item(tree, hf_ypserv_servesdomain, tvb,
			offset, 4, ENC_BIG_ENDIAN);

	offset += 4;
	return offset;
}

static int
dissect_domain_nonack_reply(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " DOMAIN_NONACK reply");

	proto_tree_add_item(tree, hf_ypserv_servesdomain, tvb,
			offset, 4, ENC_BIG_ENDIAN);

	offset += 4;
	return offset;
}

static int
dissect_match_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	const char *str;
	int offset = 0;

	proto_item_append_text(tree, " MATCH call");

	/*domain*/
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_domain, offset, &str);
	col_append_fstr(pinfo->cinfo, COL_INFO," %s/", str);
	proto_item_append_text(tree, " %s/", str);

	/*map*/
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_map, offset, &str);
	col_append_fstr(pinfo->cinfo, COL_INFO,"%s/", str);
	proto_item_append_text(tree, "%s/", str);

	/*key*/
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_key, offset, &str);
	col_append_str(pinfo->cinfo, COL_INFO, str);
	proto_item_append_text(tree, "%s", str);

	return offset;
}

static int
dissect_match_reply(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	gint32 status;
	const char *str;
	int offset = 0;

	proto_item_append_text(tree, " MATCH reply");

	offset = dissect_ypserv_status(tvb, offset, pinfo, tree, &status);

	if(status>=0){
		offset = dissect_rpc_string(tvb, tree, hf_ypserv_value,offset, &str);
		col_append_fstr(pinfo->cinfo, COL_INFO," %s", str);
		proto_item_append_text(tree, " %s", str);

	} else {
		offset = dissect_rpc_string(tvb, tree, hf_ypserv_value,offset, NULL);
	}

	return offset;
}


static int
dissect_first_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " FIRST call");

	/*
	 * XXX - does Sun's "yp.x" lie, and claim that the argument to a
	 * FIRST call is a "ypreq_key" rather than a "ypreq_nokey"?
	 * You presumably need the key for NEXT, as "next" is "next
	 * after some entry", and the key tells you which entry, but
	 * you don't need a key for FIRST, as there's only one entry that
	 * is the first entry.
	 *
	 * The NIS server originally used DBM, which has a "firstkey()"
	 * call, with no argument, and a "nextkey()" argument, with
	 * a key argument.  (Heck, it might *still* use DBM.)
	 *
	 * Given that, and given that at least one FIRST call from a Sun
	 * running Solaris 8 (the Sun on which I'm typing this, in fact)
	 * had a "ypreq_nokey" as the argument, I'm assuming that "yp.x"
	 * is buggy.
	 */

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_domain, offset, NULL);
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_map, offset, NULL);

	return offset;
}


static int
dissect_first_reply(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " FIRST reply");

	offset = dissect_ypserv_status(tvb, offset, pinfo, tree, NULL);

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_value, offset, NULL);
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_key, offset, NULL);

	return offset;
}

static int
dissect_next_reply(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " NEXT reply");

	offset = dissect_ypserv_status(tvb, offset, pinfo, tree, NULL);

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_value, offset, NULL);
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_key, offset, NULL);

	return offset;
}


static int
dissect_next_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " NEXT call");

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_domain, offset, NULL);
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_map, offset, NULL);
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_key, offset, NULL);

	return offset;
}

static int
dissect_xfr_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	proto_item *sub_item=NULL;
	proto_tree *sub_tree=NULL;
	int offset = 0;
	int start_offset = offset;

	proto_item_append_text(tree, " XFR call");

	if(tree){
		sub_item = proto_tree_add_item(tree, hf_ypserv_map_parms, tvb,
				offset, -1, ENC_NA);
		if(sub_item)
			sub_tree = proto_item_add_subtree(sub_item, ett_ypserv_map_parms);
	}

	offset = dissect_rpc_string(tvb, sub_tree, hf_ypserv_domain, offset, NULL);

	offset = dissect_rpc_string(tvb, sub_tree, hf_ypserv_map, offset, NULL);

	offset = dissect_rpc_uint32(tvb, sub_tree, hf_ypserv_ordernum, offset);

	offset = dissect_rpc_string(tvb, sub_tree, hf_ypserv_peer, offset, NULL);

	proto_tree_add_item(tree, hf_ypserv_transid, tvb, offset, 4, ENC_BIG_ENDIAN);
	offset += 4;

	offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_prog, offset);
	offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_port, offset);

	if(sub_item)
		proto_item_set_len(sub_item, offset - start_offset);

	return offset;
}

static int
dissect_clear_call(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " CLEAR call");

	return offset;
}

static int
dissect_clear_reply(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	proto_item_append_text(tree, " CLEAR reply");

	return 0;
}

static int
dissect_xfr_reply(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " XFR reply");

	proto_tree_add_item(tree, hf_ypserv_transid, tvb, offset, 4, ENC_BIG_ENDIAN);
	offset += 4;

	offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_xfrstat, offset);

	return offset;
}

static int
dissect_order_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	const char *str;
	int offset = 0;

	proto_item_append_text(tree, " ORDER call");

	/*domain*/
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_domain, offset, &str);
	col_append_fstr(pinfo->cinfo, COL_INFO," %s/", str);
	proto_item_append_text(tree, " %s/", str);

	/*map*/
	offset = dissect_rpc_string(tvb, tree, hf_ypserv_map, offset, &str);
	col_append_str(pinfo->cinfo, COL_INFO, str);
	proto_item_append_text(tree, "%s", str);

	return offset;
}

static int
dissect_all_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " ALL call");

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_domain, offset, NULL);

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_map, offset, NULL);

	return offset;
}

static int
dissect_master_call(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " MASTER call");

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_domain, offset, NULL);

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_map, offset, NULL);

	return offset;
}

static int
dissect_all_reply(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	guint32	more;
	int offset = 0;

	proto_item_append_text(tree, " ALL reply");

	for (;;) {
		more = tvb_get_ntohl(tvb, offset);

		offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_more, offset);
		if (!more)
			break;
		offset = dissect_ypserv_status(tvb, offset, pinfo, tree, NULL);

		offset = dissect_rpc_string(tvb, tree, hf_ypserv_value, offset, NULL);
		offset = dissect_rpc_string(tvb, tree, hf_ypserv_key, offset, NULL);
	}

	return offset;
}

static int
dissect_master_reply(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " MASTER reply");

	offset = dissect_ypserv_status(tvb, offset, pinfo, tree, NULL);

	offset = dissect_rpc_string(tvb, tree, hf_ypserv_peer, offset, NULL);

	return offset;
}


static int
dissect_order_reply(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	guint32 num;
	int offset = 0;

	proto_item_append_text(tree, " ORDER reply");

	offset = dissect_ypserv_status(tvb, offset, pinfo, tree, NULL);

	/*order number*/
	num=tvb_get_ntohl(tvb, offset);
	offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_ordernum, offset);
	col_append_fstr(pinfo->cinfo, COL_INFO," 0x%08x", num);
	proto_item_append_text(tree, " 0x%08x", num);

	return offset;
}


static int
dissect_maplist_reply(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	int offset = 0;
	proto_item_append_text(tree, " MAPLIST reply");

	offset = dissect_ypserv_status(tvb, offset, pinfo, tree, NULL);
	while(tvb_get_ntohl(tvb,offset)){
		offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_more, offset);
		offset = dissect_rpc_string(tvb, tree, hf_ypserv_map, offset, NULL);

	}
	offset = dissect_rpc_uint32(tvb, tree, hf_ypserv_more, offset);
	return offset;
}


/* proc number, "proc name", dissect_request, dissect_reply */

/* someone please get me a version 1 trace */

static const vsff ypserv1_proc[] = {
	{ 0, "NULL",
		dissect_rpc_void, dissect_rpc_void },
	{ YPPROC_DOMAIN, "DOMAIN",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_DOMAIN_NONACK, "DOMAIN_NONACK",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_MATCH, "MATCH",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_FIRST, "FIRST",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_NEXT,  "NEXT",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_XFR,   "XFR",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_CLEAR, "CLEAR",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_ALL,   "ALL",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_MASTER,    "MASTER",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_ORDER, "ORDER",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ YPPROC_MAPLIST,   "MAPLIST",
		dissect_rpc_unknown, dissect_rpc_unknown },
	{ 0, NULL, NULL, NULL }
};

static const value_string ypserv1_proc_vals[] = {
	{ YPPROC_DOMAIN,        "DOMAIN" },
	{ YPPROC_DOMAIN_NONACK, "DOMAIN_NONACK" },
	{ YPPROC_MATCH,         "MATCH" },
	{ YPPROC_FIRST,         "FIRST" },
	{ YPPROC_NEXT,          "NEXT" },
	{ YPPROC_XFR,           "XFR" },
	{ YPPROC_CLEAR,         "CLEAR" },
	{ YPPROC_ALL,           "ALL" },
	{ YPPROC_MASTER,        "MASTER" },
	{ YPPROC_ORDER,         "ORDER" },
	{ YPPROC_MAPLIST,       "MAPLIST" },
	{ 0, NULL }
};

/* end of YPServ version 1 */

/* proc number, "proc name", dissect_request, dissect_reply */

static const vsff ypserv2_proc[] = {
	{ 0,                    "NULL",
		dissect_rpc_void, dissect_rpc_void },
	{ YPPROC_DOMAIN,        "DOMAIN",
		dissect_domain_call, dissect_domain_reply },
	{ YPPROC_DOMAIN_NONACK, "DOMAIN_NONACK",
		dissect_domain_nonack_call, dissect_domain_nonack_reply },
	{ YPPROC_MATCH,         "MATCH",
		dissect_match_call, dissect_match_reply },
	{ YPPROC_FIRST,         "FIRST",
		dissect_first_call, dissect_first_reply },
	{ YPPROC_NEXT,          "NEXT",
		dissect_next_call, dissect_next_reply },
	{ YPPROC_XFR,           "XFR",
		dissect_xfr_call, dissect_xfr_reply },
	{ YPPROC_CLEAR,         "CLEAR",
		dissect_clear_call, dissect_clear_reply },
	{ YPPROC_ALL,           "ALL",
		dissect_all_call, dissect_all_reply },
	{ YPPROC_MASTER,        "MASTER",
		dissect_master_call, dissect_master_reply },
	{ YPPROC_ORDER,         "ORDER",
		dissect_order_call, dissect_order_reply },
	{ YPPROC_MAPLIST,       "MAPLIST",
		dissect_maplist_call, dissect_maplist_reply },
	{ 0, NULL, NULL, NULL }
};

static const value_string ypserv2_proc_vals[] = {
	{ YPPROC_DOMAIN,	"DOMAIN" },
	{ YPPROC_DOMAIN_NONACK, "DOMAIN_NONACK" },
	{ YPPROC_MATCH,		"MATCH" },
	{ YPPROC_FIRST,		"FIRST" },
	{ YPPROC_NEXT,		"NEXT" },
	{ YPPROC_XFR,		"XFR" },
	{ YPPROC_CLEAR,		"CLEAR" },
	{ YPPROC_ALL,		"ALL" },
	{ YPPROC_MASTER,	"MASTER" },
	{ YPPROC_ORDER,		"ORDER" },
	{ YPPROC_MAPLIST,	"MAPLIST" },
	{ 0, NULL }
};

/* end of YPServ version 2 */


static const rpc_prog_vers_info ypserv_vers_info[] = {
	{ 1, ypserv1_proc, &hf_ypserv_procedure_v1 },
	{ 2, ypserv2_proc, &hf_ypserv_procedure_v2 },
};

void
proto_register_ypserv(void)
{
	static hf_register_info hf[] = {
		{ &hf_ypserv_procedure_v1, {
			"V1 Procedure", "ypserv.procedure_v1", FT_UINT32, BASE_DEC,
			VALS(ypserv1_proc_vals), 0, NULL, HFILL }},
		{ &hf_ypserv_procedure_v2, {
			"V2 Procedure", "ypserv.procedure_v2", FT_UINT32, BASE_DEC,
			VALS(ypserv2_proc_vals), 0, NULL, HFILL }},
		{ &hf_ypserv_domain, {
			"Domain", "ypserv.domain", FT_STRING, BASE_NONE,
			NULL, 0, NULL, HFILL }},
		{ &hf_ypserv_servesdomain, {
			"Serves Domain", "ypserv.servesdomain", FT_BOOLEAN, BASE_NONE,
			TFS(&tfs_yes_no), 0x0, NULL, HFILL }},
		{ &hf_ypserv_map, {
			"Map Name", "ypserv.map", FT_STRING, BASE_NONE,
			NULL, 0, NULL, HFILL }},
		{ &hf_ypserv_peer, {
			"Peer Name", "ypserv.peer", FT_STRING, BASE_NONE,
			NULL, 0, NULL, HFILL }},
		{ &hf_ypserv_more, {
			"More", "ypserv.more", FT_BOOLEAN, BASE_NONE,
			TFS(&tfs_yes_no), 0x0, NULL, HFILL }},
		{ &hf_ypserv_ordernum, {
			"Order Number", "ypserv.ordernum", FT_UINT32, BASE_DEC,
			NULL, 0, "Order Number for XFR", HFILL }},
		{ &hf_ypserv_transid, {
			"Host Transport ID", "ypserv.transid", FT_IPv4, BASE_NONE,
			NULL, 0, "Host Transport ID to use for XFR Callback", HFILL }},
		{ &hf_ypserv_prog, {
			"Program Number", "ypserv.prog", FT_UINT32, BASE_DEC,
			NULL, 0, "Program Number to use for XFR Callback", HFILL }},
		{ &hf_ypserv_port, {
			"Port", "ypserv.port", FT_UINT32, BASE_DEC,
			NULL, 0, "Port to use for XFR Callback", HFILL }},
		{ &hf_ypserv_key, {
			"Key", "ypserv.key", FT_STRING, BASE_NONE,
			NULL, 0, NULL, HFILL }},
		{ &hf_ypserv_value, {
			"Value", "ypserv.value", FT_STRING, BASE_NONE,
			NULL, 0, NULL, HFILL }},
		{ &hf_ypserv_status, {
			"Status", "ypserv.status", FT_INT32, BASE_DEC,
			VALS(ypstat) , 0, NULL, HFILL }},
		{ &hf_ypserv_map_parms, {
			"YP Map Parameters", "ypserv.map_parms", FT_NONE, BASE_NONE,
			NULL, 0, NULL, HFILL }},
		{ &hf_ypserv_xfrstat, {
			"Xfrstat", "ypserv.xfrstat", FT_INT32, BASE_DEC,
			VALS(xfrstat), 0, NULL, HFILL }},
	};
	static gint *ett[] = {
		&ett_ypserv,
		&ett_ypserv_map_parms,
	};

	proto_ypserv = proto_register_protocol("Yellow Pages Service",
	    "YPSERV", "ypserv");
	proto_register_field_array(proto_ypserv, hf, array_length(hf));
	proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_ypserv(void)
{
	/* Register the protocol as RPC */
	rpc_init_prog(proto_ypserv, YPSERV_PROGRAM, ett_ypserv,
	    G_N_ELEMENTS(ypserv_vers_info), ypserv_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:
 */