1/*
2 * llc_s_ev.c - Defines SAP component events
3 *
4 * The followed event functions are SAP component events which are described
5 * in 802.2 LLC protocol standard document.
6 *
7 * Copyright (c) 1997 by Procom Technology, Inc.
8 *		 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
9 *
10 * This program can be redistributed or modified under the terms of the
11 * GNU General Public License as published by the Free Software Foundation.
12 * This program is distributed without any warranty or implied warranty
13 * of merchantability or fitness for a particular purpose.
14 *
15 * See the GNU General Public License for more details.
16 */
17#include <linux/socket.h>
18#include <net/sock.h>
19#include <net/llc_if.h>
20#include <net/llc_s_ev.h>
21#include <net/llc_pdu.h>
22
23int llc_sap_ev_activation_req(struct llc_sap *sap, struct sk_buff *skb)
24{
25	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
26
27	return ev->type == LLC_SAP_EV_TYPE_SIMPLE &&
28	       ev->prim_type == LLC_SAP_EV_ACTIVATION_REQ ? 0 : 1;
29}
30
31int llc_sap_ev_rx_ui(struct llc_sap *sap, struct sk_buff *skb)
32{
33	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
34	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
35
36	return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
37	       LLC_PDU_TYPE_IS_U(pdu) &&
38	       LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_UI ? 0 : 1;
39}
40
41int llc_sap_ev_unitdata_req(struct llc_sap *sap, struct sk_buff *skb)
42{
43	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
44
45	return ev->type == LLC_SAP_EV_TYPE_PRIM &&
46	       ev->prim == LLC_DATAUNIT_PRIM &&
47	       ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
48
49}
50
51int llc_sap_ev_xid_req(struct llc_sap *sap, struct sk_buff *skb)
52{
53	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
54
55	return ev->type == LLC_SAP_EV_TYPE_PRIM &&
56	       ev->prim == LLC_XID_PRIM &&
57	       ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
58}
59
60int llc_sap_ev_rx_xid_c(struct llc_sap *sap, struct sk_buff *skb)
61{
62	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
63	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
64
65	return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
66	       LLC_PDU_TYPE_IS_U(pdu) &&
67	       LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1;
68}
69
70int llc_sap_ev_rx_xid_r(struct llc_sap *sap, struct sk_buff *skb)
71{
72	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
73	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
74
75	return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) &&
76	       LLC_PDU_TYPE_IS_U(pdu) &&
77	       LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1;
78}
79
80int llc_sap_ev_test_req(struct llc_sap *sap, struct sk_buff *skb)
81{
82	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
83
84	return ev->type == LLC_SAP_EV_TYPE_PRIM &&
85	       ev->prim == LLC_TEST_PRIM &&
86	       ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
87}
88
89int llc_sap_ev_rx_test_c(struct llc_sap *sap, struct sk_buff *skb)
90{
91	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
92	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
93
94	return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
95	       LLC_PDU_TYPE_IS_U(pdu) &&
96	       LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1;
97}
98
99int llc_sap_ev_rx_test_r(struct llc_sap *sap, struct sk_buff *skb)
100{
101	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
102	struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
103
104	return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) &&
105	       LLC_PDU_TYPE_IS_U(pdu) &&
106	       LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1;
107}
108
109int llc_sap_ev_deactivation_req(struct llc_sap *sap, struct sk_buff *skb)
110{
111	struct llc_sap_state_ev *ev = llc_sap_ev(skb);
112
113	return ev->type == LLC_SAP_EV_TYPE_SIMPLE &&
114	       ev->prim_type == LLC_SAP_EV_DEACTIVATION_REQ ? 0 : 1;
115}
116