1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * llc_s_ev.c - Defines SAP component events 4 * 5 * The followed event functions are SAP component events which are described 6 * in 802.2 LLC protocol standard document. 7 * 8 * Copyright (c) 1997 by Procom Technology, Inc. 9 * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> 10 */ 11 #include <linux/socket.h> 12 #include <net/sock.h> 13 #include <net/llc_if.h> 14 #include <net/llc_s_ev.h> 15 #include <net/llc_pdu.h> 16 17 int llc_sap_ev_activation_req(struct llc_sap *sap, struct sk_buff *skb) 18 { 19 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 20 21 return ev->type == LLC_SAP_EV_TYPE_SIMPLE && 22 ev->prim_type == LLC_SAP_EV_ACTIVATION_REQ ? 0 : 1; 23 } 24 25 int llc_sap_ev_rx_ui(struct llc_sap *sap, struct sk_buff *skb) 26 { 27 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 28 struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); 29 30 return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) && 31 LLC_PDU_TYPE_IS_U(pdu) && 32 LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_UI ? 0 : 1; 33 } 34 35 int llc_sap_ev_unitdata_req(struct llc_sap *sap, struct sk_buff *skb) 36 { 37 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 38 39 return ev->type == LLC_SAP_EV_TYPE_PRIM && 40 ev->prim == LLC_DATAUNIT_PRIM && 41 ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1; 42 43 } 44 45 int llc_sap_ev_xid_req(struct llc_sap *sap, struct sk_buff *skb) 46 { 47 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 48 49 return ev->type == LLC_SAP_EV_TYPE_PRIM && 50 ev->prim == LLC_XID_PRIM && 51 ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1; 52 } 53 54 int llc_sap_ev_rx_xid_c(struct llc_sap *sap, struct sk_buff *skb) 55 { 56 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 57 struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); 58 59 return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) && 60 LLC_PDU_TYPE_IS_U(pdu) && 61 LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1; 62 } 63 64 int llc_sap_ev_rx_xid_r(struct llc_sap *sap, struct sk_buff *skb) 65 { 66 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 67 struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); 68 69 return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) && 70 LLC_PDU_TYPE_IS_U(pdu) && 71 LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1; 72 } 73 74 int llc_sap_ev_test_req(struct llc_sap *sap, struct sk_buff *skb) 75 { 76 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 77 78 return ev->type == LLC_SAP_EV_TYPE_PRIM && 79 ev->prim == LLC_TEST_PRIM && 80 ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1; 81 } 82 83 int llc_sap_ev_rx_test_c(struct llc_sap *sap, struct sk_buff *skb) 84 { 85 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 86 struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); 87 88 return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) && 89 LLC_PDU_TYPE_IS_U(pdu) && 90 LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1; 91 } 92 93 int llc_sap_ev_rx_test_r(struct llc_sap *sap, struct sk_buff *skb) 94 { 95 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 96 struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); 97 98 return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) && 99 LLC_PDU_TYPE_IS_U(pdu) && 100 LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1; 101 } 102 103 int llc_sap_ev_deactivation_req(struct llc_sap *sap, struct sk_buff *skb) 104 { 105 struct llc_sap_state_ev *ev = llc_sap_ev(skb); 106 107 return ev->type == LLC_SAP_EV_TYPE_SIMPLE && 108 ev->prim_type == LLC_SAP_EV_DEACTIVATION_REQ ? 0 : 1; 109 } 110