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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 |
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