Release 4.15 net/llc/llc_station.c
/*
* llc_station.c - station component of LLC
*
* Copyright (c) 1997 by Procom Technology, Inc.
* 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* This program can be redistributed or modified under the terms of the
* GNU General Public License as published by the Free Software Foundation.
* This program is distributed without any warranty or implied warranty
* of merchantability or fitness for a particular purpose.
*
* See the GNU General Public License for more details.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <net/llc.h>
#include <net/llc_sap.h>
#include <net/llc_conn.h>
#include <net/llc_c_ac.h>
#include <net/llc_s_ac.h>
#include <net/llc_c_ev.h>
#include <net/llc_c_st.h>
#include <net/llc_s_ev.h>
#include <net/llc_s_st.h>
#include <net/llc_pdu.h>
static int llc_stat_ev_rx_null_dsap_xid_c(struct sk_buff *skb)
{
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return LLC_PDU_IS_CMD(pdu) && /* command PDU */
LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID &&
!pdu->dsap ? 0 : 1; /* NULL DSAP value */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 33 | 64.71% | 1 | 50.00% |
| Ben Hutchings | 18 | 35.29% | 1 | 50.00% |
| Total | 51 | 100.00% | 2 | 100.00% |
static int llc_stat_ev_rx_null_dsap_test_c(struct sk_buff *skb)
{
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return LLC_PDU_IS_CMD(pdu) && /* command PDU */
LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST &&
!pdu->dsap ? 0 : 1; /* NULL DSAP */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 48 | 94.12% | 1 | 50.00% |
| Ben Hutchings | 3 | 5.88% | 1 | 50.00% |
| Total | 51 | 100.00% | 2 | 100.00% |
static int llc_station_ac_send_xid_r(struct sk_buff *skb)
{
u8 mac_da[ETH_ALEN], dsap;
int rc = 1;
struct sk_buff *nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U,
sizeof(struct llc_xid_info));
if (!nskb)
goto out;
rc = 0;
llc_pdu_decode_sa(skb, mac_da);
llc_pdu_decode_ssap(skb, &dsap);
llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
llc_pdu_init_as_xid_rsp(nskb, LLC_XID_NULL_CLASS_2, 127);
rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
if (unlikely(rc))
goto free;
dev_queue_xmit(nskb);
out:
return rc;
free:
kfree_skb(nskb);
goto out;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ben Hutchings | 112 | 80.00% | 2 | 66.67% |
| Arnaldo Carvalho de Melo | 28 | 20.00% | 1 | 33.33% |
| Total | 140 | 100.00% | 3 | 100.00% |
static int llc_station_ac_send_test_r(struct sk_buff *skb)
{
u8 mac_da[ETH_ALEN], dsap;
int rc = 1;
u32 data_size;
struct sk_buff *nskb;
/* The test request command is type U (llc_len = 3) */
data_size = ntohs(eth_hdr(skb)->h_proto) - 3;
nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U, data_size);
if (!nskb)
goto out;
rc = 0;
llc_pdu_decode_sa(skb, mac_da);
llc_pdu_decode_ssap(skb, &dsap);
llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
llc_pdu_init_as_test_rsp(nskb, skb);
rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
if (unlikely(rc))
goto free;
dev_queue_xmit(nskb);
out:
return rc;
free:
kfree_skb(nskb);
goto out;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ben Hutchings | 110 | 71.43% | 2 | 66.67% |
| Arnaldo Carvalho de Melo | 44 | 28.57% | 1 | 33.33% |
| Total | 154 | 100.00% | 3 | 100.00% |
/**
* llc_station_rcv - send received pdu to the station state machine
* @skb: received frame.
*
* Sends data unit to station state machine.
*/
static void llc_station_rcv(struct sk_buff *skb)
{
if (llc_stat_ev_rx_null_dsap_xid_c(skb))
llc_station_ac_send_xid_r(skb);
else if (llc_stat_ev_rx_null_dsap_test_c(skb))
llc_station_ac_send_test_r(skb);
kfree_skb(skb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 31 | 75.61% | 4 | 66.67% |
| Ben Hutchings | 10 | 24.39% | 2 | 33.33% |
| Total | 41 | 100.00% | 6 | 100.00% |
void __init llc_station_init(void)
{
llc_set_station_handler(llc_station_rcv);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 7 | 53.85% | 2 | 50.00% |
| Ben Hutchings | 6 | 46.15% | 2 | 50.00% |
| Total | 13 | 100.00% | 4 | 100.00% |
void llc_station_exit(void)
{
llc_set_station_handler(NULL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 12 | 100.00% | 3 | 100.00% |
| Total | 12 | 100.00% | 3 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ben Hutchings | 260 | 51.69% | 6 | 40.00% |
| Arnaldo Carvalho de Melo | 240 | 47.71% | 8 | 53.33% |
| Tejun Heo | 3 | 0.60% | 1 | 6.67% |
| Total | 503 | 100.00% | 15 | 100.00% |
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