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xianfeng |
/*
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* llc_s_ev.c - Defines SAP component events
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*
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* The followed event functions are SAP component events which are described
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* in 802.2 LLC protocol standard document.
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*
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* Copyright (c) 1997 by Procom Technology, Inc.
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* 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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*
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* This program can be redistributed or modified under the terms of the
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* GNU General Public License as published by the Free Software Foundation.
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* This program is distributed without any warranty or implied warranty
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* of merchantability or fitness for a particular purpose.
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*
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* See the GNU General Public License for more details.
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*/
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#include <linux/socket.h>
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#include <net/sock.h>
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#include <net/llc_if.h>
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#include <net/llc_s_ev.h>
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#include <net/llc_pdu.h>
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int llc_sap_ev_activation_req(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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return ev->type == LLC_SAP_EV_TYPE_SIMPLE &&
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ev->prim_type == LLC_SAP_EV_ACTIVATION_REQ ? 0 : 1;
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}
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int llc_sap_ev_rx_ui(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
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LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_UI ? 0 : 1;
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}
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int llc_sap_ev_unitdata_req(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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return ev->type == LLC_SAP_EV_TYPE_PRIM &&
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ev->prim == LLC_DATAUNIT_PRIM &&
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ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
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}
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int llc_sap_ev_xid_req(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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return ev->type == LLC_SAP_EV_TYPE_PRIM &&
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ev->prim == LLC_XID_PRIM &&
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ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
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}
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int llc_sap_ev_rx_xid_c(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
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LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1;
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}
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int llc_sap_ev_rx_xid_r(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) &&
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LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1;
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}
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int llc_sap_ev_test_req(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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return ev->type == LLC_SAP_EV_TYPE_PRIM &&
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ev->prim == LLC_TEST_PRIM &&
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ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
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}
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int llc_sap_ev_rx_test_c(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
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LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1;
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}
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int llc_sap_ev_rx_test_r(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) &&
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LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1;
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}
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int llc_sap_ev_deactivation_req(struct llc_sap *sap, struct sk_buff *skb)
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{
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struct llc_sap_state_ev *ev = llc_sap_ev(skb);
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return ev->type == LLC_SAP_EV_TYPE_SIMPLE &&
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ev->prim_type == LLC_SAP_EV_DEACTIVATION_REQ ? 0 : 1;
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}
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