xref: /openbmc/linux/net/llc/llc_s_ev.c (revision 2c684d89)
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 
23 int 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 
31 int 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 
41 int 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 
51 int 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 
60 int 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 
70 int 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 
80 int 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 
89 int 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 
99 int 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 
109 int 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