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0dc47877a3
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
749 lines
21 KiB
C
749 lines
21 KiB
C
/*
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* llc_c_ev.c - Connection component state transition event qualifiers
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*
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* A 'state' consists of a number of possible event matching functions,
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* the actions associated with each being executed when that event is
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* matched; a 'state machine' accepts events in a serial fashion from an
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* event queue. Each event is passed to each successive event matching
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* function until a match is made (the event matching function returns
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* success, or '0') or the list of event matching functions is exhausted.
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* If a match is made, the actions associated with the event are executed
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* and the state is changed to that event's transition state. Before some
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* events are recognized, even after a match has been made, a certain
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* number of 'event qualifier' functions must also be executed. If these
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* all execute successfully, then the event is finally executed.
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*
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* These event functions must return 0 for success, to show a matched
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* event, of 1 if the event does not match. Event qualifier functions
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* must return a 0 for success or a non-zero for failure. Each function
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* is simply responsible for verifying one single thing and returning
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* either a success or failure.
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*
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* All of followed event functions are described in 802.2 LLC Protocol
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* standard document except two functions that we added that will explain
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* in their comments, at below.
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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/netdevice.h>
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#include <net/llc_conn.h>
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#include <net/llc_sap.h>
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#include <net/sock.h>
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#include <net/llc_c_ac.h>
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#include <net/llc_c_ev.h>
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#include <net/llc_pdu.h>
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#if 1
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#define dprintk(args...) printk(KERN_DEBUG args)
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#else
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#define dprintk(args...)
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#endif
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/**
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* llc_util_ns_inside_rx_window - check if sequence number is in rx window
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* @ns: sequence number of received pdu.
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* @vr: sequence number which receiver expects to receive.
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* @rw: receive window size of receiver.
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*
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* Checks if sequence number of received PDU is in range of receive
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* window. Returns 0 for success, 1 otherwise
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*/
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static u16 llc_util_ns_inside_rx_window(u8 ns, u8 vr, u8 rw)
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{
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return !llc_circular_between(vr, ns,
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(vr + rw - 1) % LLC_2_SEQ_NBR_MODULO);
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}
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/**
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* llc_util_nr_inside_tx_window - check if sequence number is in tx window
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* @sk: current connection.
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* @nr: N(R) of received PDU.
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*
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* This routine checks if N(R) of received PDU is in range of transmit
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* window; on the other hand checks if received PDU acknowledges some
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* outstanding PDUs that are in transmit window. Returns 0 for success, 1
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* otherwise.
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*/
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static u16 llc_util_nr_inside_tx_window(struct sock *sk, u8 nr)
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{
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u8 nr1, nr2;
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struct sk_buff *skb;
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struct llc_pdu_sn *pdu;
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struct llc_sock *llc = llc_sk(sk);
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int rc = 0;
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if (llc->dev->flags & IFF_LOOPBACK)
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goto out;
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rc = 1;
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if (skb_queue_empty(&llc->pdu_unack_q))
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goto out;
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skb = skb_peek(&llc->pdu_unack_q);
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pdu = llc_pdu_sn_hdr(skb);
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nr1 = LLC_I_GET_NS(pdu);
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skb = skb_peek_tail(&llc->pdu_unack_q);
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pdu = llc_pdu_sn_hdr(skb);
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nr2 = LLC_I_GET_NS(pdu);
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rc = !llc_circular_between(nr1, nr, (nr2 + 1) % LLC_2_SEQ_NBR_MODULO);
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out:
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return rc;
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}
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int llc_conn_ev_conn_req(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
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return ev->prim == LLC_CONN_PRIM &&
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ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
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}
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int llc_conn_ev_data_req(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
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return ev->prim == LLC_DATA_PRIM &&
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ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
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}
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int llc_conn_ev_disc_req(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
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return ev->prim == LLC_DISC_PRIM &&
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ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
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}
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int llc_conn_ev_rst_req(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
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return ev->prim == LLC_RESET_PRIM &&
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ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
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}
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int llc_conn_ev_local_busy_detected(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
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return ev->type == LLC_CONN_EV_TYPE_SIMPLE &&
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ev->prim_type == LLC_CONN_EV_LOCAL_BUSY_DETECTED ? 0 : 1;
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}
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int llc_conn_ev_local_busy_cleared(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
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return ev->type == LLC_CONN_EV_TYPE_SIMPLE &&
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ev->prim_type == LLC_CONN_EV_LOCAL_BUSY_CLEARED ? 0 : 1;
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}
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int llc_conn_ev_rx_bad_pdu(struct sock *sk, struct sk_buff *skb)
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{
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return 1;
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}
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int llc_conn_ev_rx_disc_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_DISC ? 0 : 1;
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}
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int llc_conn_ev_rx_dm_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_DM ? 0 : 1;
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}
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int llc_conn_ev_rx_frmr_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
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LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_FRMR ? 0 : 1;
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}
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int llc_conn_ev_rx_i_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return llc_conn_space(sk, skb) &&
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LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_0(pdu) &&
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LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
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}
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int llc_conn_ev_rx_i_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return llc_conn_space(sk, skb) &&
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LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_1(pdu) &&
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LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
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}
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int llc_conn_ev_rx_i_cmd_pbit_set_0_unexpd_ns(struct sock *sk,
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struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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const u8 vr = llc_sk(sk)->vR;
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const u8 ns = LLC_I_GET_NS(pdu);
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return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_0(pdu) && ns != vr &&
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!llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
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}
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int llc_conn_ev_rx_i_cmd_pbit_set_1_unexpd_ns(struct sock *sk,
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struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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const u8 vr = llc_sk(sk)->vR;
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const u8 ns = LLC_I_GET_NS(pdu);
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return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_1(pdu) && ns != vr &&
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!llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
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}
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int llc_conn_ev_rx_i_cmd_pbit_set_x_inval_ns(struct sock *sk,
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struct sk_buff *skb)
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{
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const struct llc_pdu_sn * pdu = llc_pdu_sn_hdr(skb);
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const u8 vr = llc_sk(sk)->vR;
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const u8 ns = LLC_I_GET_NS(pdu);
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const u16 rc = LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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ns != vr &&
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llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
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if (!rc)
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dprintk("%s: matched, state=%d, ns=%d, vr=%d\n",
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__func__, llc_sk(sk)->state, ns, vr);
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return rc;
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}
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int llc_conn_ev_rx_i_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return llc_conn_space(sk, skb) &&
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LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_0(pdu) &&
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LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
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}
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int llc_conn_ev_rx_i_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_1(pdu) &&
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LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
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}
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int llc_conn_ev_rx_i_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return llc_conn_space(sk, skb) &&
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LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
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}
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int llc_conn_ev_rx_i_rsp_fbit_set_0_unexpd_ns(struct sock *sk,
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struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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const u8 vr = llc_sk(sk)->vR;
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const u8 ns = LLC_I_GET_NS(pdu);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_0(pdu) && ns != vr &&
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!llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
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}
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int llc_conn_ev_rx_i_rsp_fbit_set_1_unexpd_ns(struct sock *sk,
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struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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const u8 vr = llc_sk(sk)->vR;
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const u8 ns = LLC_I_GET_NS(pdu);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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LLC_I_PF_IS_1(pdu) && ns != vr &&
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!llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
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}
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int llc_conn_ev_rx_i_rsp_fbit_set_x_unexpd_ns(struct sock *sk,
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struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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const u8 vr = llc_sk(sk)->vR;
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const u8 ns = LLC_I_GET_NS(pdu);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) && ns != vr &&
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!llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
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}
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int llc_conn_ev_rx_i_rsp_fbit_set_x_inval_ns(struct sock *sk,
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struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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const u8 vr = llc_sk(sk)->vR;
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const u8 ns = LLC_I_GET_NS(pdu);
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const u16 rc = LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
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ns != vr &&
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llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
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if (!rc)
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dprintk("%s: matched, state=%d, ns=%d, vr=%d\n",
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__func__, llc_sk(sk)->state, ns, vr);
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return rc;
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}
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int llc_conn_ev_rx_rej_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PF_IS_0(pdu) &&
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LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_REJ ? 0 : 1;
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}
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int llc_conn_ev_rx_rej_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PF_IS_1(pdu) &&
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LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_REJ ? 0 : 1;
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}
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int llc_conn_ev_rx_rej_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PF_IS_0(pdu) &&
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LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_REJ ? 0 : 1;
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}
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int llc_conn_ev_rx_rej_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PF_IS_1(pdu) &&
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LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_REJ ? 0 : 1;
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}
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int llc_conn_ev_rx_rej_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_REJ ? 0 : 1;
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}
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int llc_conn_ev_rx_rnr_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PF_IS_0(pdu) &&
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LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RNR ? 0 : 1;
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}
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int llc_conn_ev_rx_rnr_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PF_IS_1(pdu) &&
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LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RNR ? 0 : 1;
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}
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int llc_conn_ev_rx_rnr_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
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LLC_S_PF_IS_0(pdu) &&
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LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RNR ? 0 : 1;
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}
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|
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int llc_conn_ev_rx_rnr_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
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{
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const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
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return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
|
|
LLC_S_PF_IS_1(pdu) &&
|
|
LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RNR ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_rx_rr_cmd_pbit_set_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
|
|
|
|
return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
|
|
LLC_S_PF_IS_0(pdu) &&
|
|
LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RR ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_rx_rr_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
|
|
|
|
return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
|
|
LLC_S_PF_IS_1(pdu) &&
|
|
LLC_S_PDU_CMD(pdu) == LLC_2_PDU_CMD_RR ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_rx_rr_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
|
|
|
|
return llc_conn_space(sk, skb) &&
|
|
LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
|
|
LLC_S_PF_IS_0(pdu) &&
|
|
LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RR ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_rx_rr_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
|
|
|
|
return llc_conn_space(sk, skb) &&
|
|
LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
|
|
LLC_S_PF_IS_1(pdu) &&
|
|
LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_RR ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_rx_sabme_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
|
|
|
|
return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
|
|
LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_SABME ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_rx_ua_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
|
|
|
|
return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
|
|
LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_UA ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_rx_xxx_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
u16 rc = 1;
|
|
const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
|
|
|
|
if (LLC_PDU_IS_CMD(pdu)) {
|
|
if (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu)) {
|
|
if (LLC_I_PF_IS_1(pdu))
|
|
rc = 0;
|
|
} else if (LLC_PDU_TYPE_IS_U(pdu) && LLC_U_PF_IS_1(pdu))
|
|
rc = 0;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int llc_conn_ev_rx_xxx_cmd_pbit_set_x(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
u16 rc = 1;
|
|
const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
|
|
|
|
if (LLC_PDU_IS_CMD(pdu)) {
|
|
if (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu))
|
|
rc = 0;
|
|
else if (LLC_PDU_TYPE_IS_U(pdu))
|
|
switch (LLC_U_PDU_CMD(pdu)) {
|
|
case LLC_2_PDU_CMD_SABME:
|
|
case LLC_2_PDU_CMD_DISC:
|
|
rc = 0;
|
|
break;
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int llc_conn_ev_rx_xxx_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
u16 rc = 1;
|
|
const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
|
|
|
|
if (LLC_PDU_IS_RSP(pdu)) {
|
|
if (LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu))
|
|
rc = 0;
|
|
else if (LLC_PDU_TYPE_IS_U(pdu))
|
|
switch (LLC_U_PDU_RSP(pdu)) {
|
|
case LLC_2_PDU_RSP_UA:
|
|
case LLC_2_PDU_RSP_DM:
|
|
case LLC_2_PDU_RSP_FRMR:
|
|
rc = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int llc_conn_ev_rx_zzz_cmd_pbit_set_x_inval_nr(struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
u16 rc = 1;
|
|
const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
|
|
const u8 vs = llc_sk(sk)->vS;
|
|
const u8 nr = LLC_I_GET_NR(pdu);
|
|
|
|
if (LLC_PDU_IS_CMD(pdu) &&
|
|
(LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu)) &&
|
|
nr != vs && llc_util_nr_inside_tx_window(sk, nr)) {
|
|
dprintk("%s: matched, state=%d, vs=%d, nr=%d\n",
|
|
__func__, llc_sk(sk)->state, vs, nr);
|
|
rc = 0;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int llc_conn_ev_rx_zzz_rsp_fbit_set_x_inval_nr(struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
u16 rc = 1;
|
|
const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
|
|
const u8 vs = llc_sk(sk)->vS;
|
|
const u8 nr = LLC_I_GET_NR(pdu);
|
|
|
|
if (LLC_PDU_IS_RSP(pdu) &&
|
|
(LLC_PDU_TYPE_IS_I(pdu) || LLC_PDU_TYPE_IS_S(pdu)) &&
|
|
nr != vs && llc_util_nr_inside_tx_window(sk, nr)) {
|
|
rc = 0;
|
|
dprintk("%s: matched, state=%d, vs=%d, nr=%d\n",
|
|
__func__, llc_sk(sk)->state, vs, nr);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int llc_conn_ev_rx_any_frame(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int llc_conn_ev_p_tmr_exp(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
return ev->type != LLC_CONN_EV_TYPE_P_TMR;
|
|
}
|
|
|
|
int llc_conn_ev_ack_tmr_exp(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
return ev->type != LLC_CONN_EV_TYPE_ACK_TMR;
|
|
}
|
|
|
|
int llc_conn_ev_rej_tmr_exp(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
return ev->type != LLC_CONN_EV_TYPE_REJ_TMR;
|
|
}
|
|
|
|
int llc_conn_ev_busy_tmr_exp(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
return ev->type != LLC_CONN_EV_TYPE_BUSY_TMR;
|
|
}
|
|
|
|
int llc_conn_ev_init_p_f_cycle(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int llc_conn_ev_tx_buffer_full(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
return ev->type == LLC_CONN_EV_TYPE_SIMPLE &&
|
|
ev->prim_type == LLC_CONN_EV_TX_BUFF_FULL ? 0 : 1;
|
|
}
|
|
|
|
/* Event qualifier functions
|
|
*
|
|
* these functions simply verify the value of a state flag associated with
|
|
* the connection and return either a 0 for success or a non-zero value
|
|
* for not-success; verify the event is the type we expect
|
|
*/
|
|
int llc_conn_ev_qlfy_data_flag_eq_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->data_flag != 1;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_data_flag_eq_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->data_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_data_flag_eq_2(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->data_flag != 2;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_p_flag_eq_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->p_flag != 1;
|
|
}
|
|
|
|
/**
|
|
* conn_ev_qlfy_last_frame_eq_1 - checks if frame is last in tx window
|
|
* @sk: current connection structure.
|
|
* @skb: current event.
|
|
*
|
|
* This function determines when frame which is sent, is last frame of
|
|
* transmit window, if it is then this function return zero else return
|
|
* one. This function is used for sending last frame of transmit window
|
|
* as I-format command with p-bit set to one. Returns 0 if frame is last
|
|
* frame, 1 otherwise.
|
|
*/
|
|
int llc_conn_ev_qlfy_last_frame_eq_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return !(skb_queue_len(&llc_sk(sk)->pdu_unack_q) + 1 == llc_sk(sk)->k);
|
|
}
|
|
|
|
/**
|
|
* conn_ev_qlfy_last_frame_eq_0 - checks if frame isn't last in tx window
|
|
* @sk: current connection structure.
|
|
* @skb: current event.
|
|
*
|
|
* This function determines when frame which is sent, isn't last frame of
|
|
* transmit window, if it isn't then this function return zero else return
|
|
* one. Returns 0 if frame isn't last frame, 1 otherwise.
|
|
*/
|
|
int llc_conn_ev_qlfy_last_frame_eq_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return skb_queue_len(&llc_sk(sk)->pdu_unack_q) + 1 == llc_sk(sk)->k;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_p_flag_eq_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->p_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_p_flag_eq_f(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
u8 f_bit;
|
|
|
|
llc_pdu_decode_pf_bit(skb, &f_bit);
|
|
return llc_sk(sk)->p_flag == f_bit ? 0 : 1;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_remote_busy_eq_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->remote_busy_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_remote_busy_eq_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return !llc_sk(sk)->remote_busy_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_retry_cnt_lt_n2(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return !(llc_sk(sk)->retry_count < llc_sk(sk)->n2);
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_retry_cnt_gte_n2(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return !(llc_sk(sk)->retry_count >= llc_sk(sk)->n2);
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_s_flag_eq_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return !llc_sk(sk)->s_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_s_flag_eq_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->s_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_cause_flag_eq_1(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return !llc_sk(sk)->cause_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_cause_flag_eq_0(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return llc_sk(sk)->cause_flag;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_set_status_conn(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
ev->status = LLC_STATUS_CONN;
|
|
return 0;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_set_status_disc(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
ev->status = LLC_STATUS_DISC;
|
|
return 0;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_set_status_failed(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
ev->status = LLC_STATUS_FAILED;
|
|
return 0;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_set_status_remote_busy(struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
ev->status = LLC_STATUS_REMOTE_BUSY;
|
|
return 0;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_set_status_refuse(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
ev->status = LLC_STATUS_REFUSE;
|
|
return 0;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_set_status_conflict(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
ev->status = LLC_STATUS_CONFLICT;
|
|
return 0;
|
|
}
|
|
|
|
int llc_conn_ev_qlfy_set_status_rst_done(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct llc_conn_state_ev *ev = llc_conn_ev(skb);
|
|
|
|
ev->status = LLC_STATUS_RESET_DONE;
|
|
return 0;
|
|
}
|