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 llc_sap_ev_activation_req(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_rx_ui(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_unitdata_req(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_xid_req(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_rx_xid_c(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_rx_xid_r(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_test_req(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_rx_test_c(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_rx_test_r(struct llc_sap * sap,struct sk_buff * skb)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 llc_sap_ev_deactivation_req(struct llc_sap * sap,struct sk_buff * skb)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