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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/net/llc/llc_s_ev.c
26282 views
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/*

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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 <[email protected]>

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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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