mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Tim BirdandJakub Kicinski
0b13c6a618
Most of the lls source files are missing SPDX-License-Identifier lines. Add appropriate IDs to these files, and remove other license info from the header. In once case, leave the existing id line and just remove the license reference text. Signed-off-by: Tim Bird <tim.bird@sony.com> Link: https://patch.msgid.link/20260522225508.24006-1-tim.bird@sony.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* llc_station.c - station component of LLC
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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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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <net/llc.h>
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#include <net/llc_sap.h>
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#include <net/llc_conn.h>
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#include <net/llc_c_ac.h>
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#include <net/llc_s_ac.h>
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#include <net/llc_c_ev.h>
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#include <net/llc_c_st.h>
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#include <net/llc_s_ev.h>
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#include <net/llc_s_st.h>
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#include <net/llc_pdu.h>
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static int llc_stat_ev_rx_null_dsap_xid_c(struct sk_buff *skb)
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{
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struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return LLC_PDU_IS_CMD(pdu) && /* command PDU */
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LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
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LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID &&
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!pdu->dsap; /* NULL DSAP value */
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}
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static int llc_stat_ev_rx_null_dsap_test_c(struct sk_buff *skb)
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{
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struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return LLC_PDU_IS_CMD(pdu) && /* command PDU */
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LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
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LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST &&
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!pdu->dsap; /* NULL DSAP */
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}
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static int llc_station_ac_send_xid_r(struct sk_buff *skb)
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{
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u8 mac_da[ETH_ALEN], dsap;
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int rc = 1;
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struct sk_buff *nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U,
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sizeof(struct llc_xid_info));
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if (!nskb)
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goto out;
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llc_pdu_decode_sa(skb, mac_da);
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llc_pdu_decode_ssap(skb, &dsap);
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llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
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llc_pdu_init_as_xid_rsp(nskb, LLC_XID_NULL_CLASS_2, 127);
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rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
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if (unlikely(rc))
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goto free;
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dev_queue_xmit(nskb);
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out:
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return rc;
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free:
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kfree_skb(nskb);
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goto out;
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}
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static int llc_station_ac_send_test_r(struct sk_buff *skb)
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{
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u8 mac_da[ETH_ALEN], dsap;
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int rc = 1;
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u32 data_size;
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struct sk_buff *nskb;
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if (skb->mac_len < ETH_HLEN)
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goto out;
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/* The test request command is type U (llc_len = 3) */
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data_size = ntohs(eth_hdr(skb)->h_proto) - 3;
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nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U, data_size);
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if (!nskb)
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goto out;
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llc_pdu_decode_sa(skb, mac_da);
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llc_pdu_decode_ssap(skb, &dsap);
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llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
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llc_pdu_init_as_test_rsp(nskb, skb);
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rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
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if (unlikely(rc))
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goto free;
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dev_queue_xmit(nskb);
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out:
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return rc;
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free:
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kfree_skb(nskb);
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goto out;
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}
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/**
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* llc_station_rcv - send received pdu to the station state machine
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* @skb: received frame.
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*
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* Sends data unit to station state machine.
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*/
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static void llc_station_rcv(struct sk_buff *skb)
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{
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if (llc_stat_ev_rx_null_dsap_xid_c(skb))
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llc_station_ac_send_xid_r(skb);
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else if (llc_stat_ev_rx_null_dsap_test_c(skb))
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llc_station_ac_send_test_r(skb);
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kfree_skb(skb);
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}
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void __init llc_station_init(void)
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{
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llc_set_station_handler(llc_station_rcv);
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}
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void llc_station_exit(void)
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{
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llc_set_station_handler(NULL);
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}
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