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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /net/llc/llc_c_ev.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ...
Diffstat (limited to 'net/llc/llc_c_ev.c')
-rw-r--r--net/llc/llc_c_ev.c748
1 files changed, 748 insertions, 0 deletions
diff --git a/net/llc/llc_c_ev.c b/net/llc/llc_c_ev.c
new file mode 100644
index 000000000..d6627a80c
--- /dev/null
+++ b/net/llc/llc_c_ev.c
@@ -0,0 +1,748 @@
+/*
+ * llc_c_ev.c - Connection component state transition event qualifiers
+ *
+ * A 'state' consists of a number of possible event matching functions,
+ * the actions associated with each being executed when that event is
+ * matched; a 'state machine' accepts events in a serial fashion from an
+ * event queue. Each event is passed to each successive event matching
+ * function until a match is made (the event matching function returns
+ * success, or '0') or the list of event matching functions is exhausted.
+ * If a match is made, the actions associated with the event are executed
+ * and the state is changed to that event's transition state. Before some
+ * events are recognized, even after a match has been made, a certain
+ * number of 'event qualifier' functions must also be executed. If these
+ * all execute successfully, then the event is finally executed.
+ *
+ * These event functions must return 0 for success, to show a matched
+ * event, of 1 if the event does not match. Event qualifier functions
+ * must return a 0 for success or a non-zero for failure. Each function
+ * is simply responsible for verifying one single thing and returning
+ * either a success or failure.
+ *
+ * All of followed event functions are described in 802.2 LLC Protocol
+ * standard document except two functions that we added that will explain
+ * in their comments, at below.
+ *
+ * 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/netdevice.h>
+#include <net/llc_conn.h>
+#include <net/llc_sap.h>
+#include <net/sock.h>
+#include <net/llc_c_ac.h>
+#include <net/llc_c_ev.h>
+#include <net/llc_pdu.h>
+
+#if 1
+#define dprintk(args...) printk(KERN_DEBUG args)
+#else
+#define dprintk(args...)
+#endif
+
+/**
+ * llc_util_ns_inside_rx_window - check if sequence number is in rx window
+ * @ns: sequence number of received pdu.
+ * @vr: sequence number which receiver expects to receive.
+ * @rw: receive window size of receiver.
+ *
+ * Checks if sequence number of received PDU is in range of receive
+ * window. Returns 0 for success, 1 otherwise
+ */
+static u16 llc_util_ns_inside_rx_window(u8 ns, u8 vr, u8 rw)
+{
+ return !llc_circular_between(vr, ns,
+ (vr + rw - 1) % LLC_2_SEQ_NBR_MODULO);
+}
+
+/**
+ * llc_util_nr_inside_tx_window - check if sequence number is in tx window
+ * @sk: current connection.
+ * @nr: N(R) of received PDU.
+ *
+ * This routine checks if N(R) of received PDU is in range of transmit
+ * window; on the other hand checks if received PDU acknowledges some
+ * outstanding PDUs that are in transmit window. Returns 0 for success, 1
+ * otherwise.
+ */
+static u16 llc_util_nr_inside_tx_window(struct sock *sk, u8 nr)
+{
+ u8 nr1, nr2;
+ struct sk_buff *skb;
+ struct llc_pdu_sn *pdu;
+ struct llc_sock *llc = llc_sk(sk);
+ int rc = 0;
+
+ if (llc->dev->flags & IFF_LOOPBACK)
+ goto out;
+ rc = 1;
+ if (skb_queue_empty(&llc->pdu_unack_q))
+ goto out;
+ skb = skb_peek(&llc->pdu_unack_q);
+ pdu = llc_pdu_sn_hdr(skb);
+ nr1 = LLC_I_GET_NS(pdu);
+ skb = skb_peek_tail(&llc->pdu_unack_q);
+ pdu = llc_pdu_sn_hdr(skb);
+ nr2 = LLC_I_GET_NS(pdu);
+ rc = !llc_circular_between(nr1, nr, (nr2 + 1) % LLC_2_SEQ_NBR_MODULO);
+out:
+ return rc;
+}
+
+int llc_conn_ev_conn_req(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
+
+ return ev->prim == LLC_CONN_PRIM &&
+ ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
+}
+
+int llc_conn_ev_data_req(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
+
+ return ev->prim == LLC_DATA_PRIM &&
+ ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
+}
+
+int llc_conn_ev_disc_req(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
+
+ return ev->prim == LLC_DISC_PRIM &&
+ ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
+}
+
+int llc_conn_ev_rst_req(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_conn_state_ev *ev = llc_conn_ev(skb);
+
+ return ev->prim == LLC_RESET_PRIM &&
+ ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
+}
+
+int llc_conn_ev_local_busy_detected(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_LOCAL_BUSY_DETECTED ? 0 : 1;
+}
+
+int llc_conn_ev_local_busy_cleared(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_LOCAL_BUSY_CLEARED ? 0 : 1;
+}
+
+int llc_conn_ev_rx_bad_pdu(struct sock *sk, struct sk_buff *skb)
+{
+ return 1;
+}
+
+int llc_conn_ev_rx_disc_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_DISC ? 0 : 1;
+}
+
+int llc_conn_ev_rx_dm_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
+{
+ const 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_DM ? 0 : 1;
+}
+
+int llc_conn_ev_rx_frmr_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
+{
+ const 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_FRMR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_cmd_pbit_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_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ LLC_I_PF_IS_0(pdu) &&
+ LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_cmd_pbit_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_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ LLC_I_PF_IS_1(pdu) &&
+ LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_cmd_pbit_set_0_unexpd_ns(struct sock *sk,
+ struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+ const u8 vr = llc_sk(sk)->vR;
+ const u8 ns = LLC_I_GET_NS(pdu);
+
+ return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ LLC_I_PF_IS_0(pdu) && ns != vr &&
+ !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_cmd_pbit_set_1_unexpd_ns(struct sock *sk,
+ struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+ const u8 vr = llc_sk(sk)->vR;
+ const u8 ns = LLC_I_GET_NS(pdu);
+
+ return LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ LLC_I_PF_IS_1(pdu) && ns != vr &&
+ !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_cmd_pbit_set_x_inval_ns(struct sock *sk,
+ struct sk_buff *skb)
+{
+ const struct llc_pdu_sn * pdu = llc_pdu_sn_hdr(skb);
+ const u8 vr = llc_sk(sk)->vR;
+ const u8 ns = LLC_I_GET_NS(pdu);
+ const u16 rc = LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ ns != vr &&
+ llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
+ if (!rc)
+ dprintk("%s: matched, state=%d, ns=%d, vr=%d\n",
+ __func__, llc_sk(sk)->state, ns, vr);
+ return rc;
+}
+
+int llc_conn_ev_rx_i_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_I(pdu) &&
+ LLC_I_PF_IS_0(pdu) &&
+ LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+
+ return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ LLC_I_PF_IS_1(pdu) &&
+ LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_rsp_fbit_set_x(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_I(pdu) &&
+ LLC_I_GET_NS(pdu) == llc_sk(sk)->vR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_rsp_fbit_set_0_unexpd_ns(struct sock *sk,
+ struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+ const u8 vr = llc_sk(sk)->vR;
+ const u8 ns = LLC_I_GET_NS(pdu);
+
+ return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ LLC_I_PF_IS_0(pdu) && ns != vr &&
+ !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_rsp_fbit_set_1_unexpd_ns(struct sock *sk,
+ struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+ const u8 vr = llc_sk(sk)->vR;
+ const u8 ns = LLC_I_GET_NS(pdu);
+
+ return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ LLC_I_PF_IS_1(pdu) && ns != vr &&
+ !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_rsp_fbit_set_x_unexpd_ns(struct sock *sk,
+ struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+ const u8 vr = llc_sk(sk)->vR;
+ const u8 ns = LLC_I_GET_NS(pdu);
+
+ return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) && ns != vr &&
+ !llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
+}
+
+int llc_conn_ev_rx_i_rsp_fbit_set_x_inval_ns(struct sock *sk,
+ struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+ const u8 vr = llc_sk(sk)->vR;
+ const u8 ns = LLC_I_GET_NS(pdu);
+ const u16 rc = LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
+ ns != vr &&
+ llc_util_ns_inside_rx_window(ns, vr, llc_sk(sk)->rw) ? 0 : 1;
+ if (!rc)
+ dprintk("%s: matched, state=%d, ns=%d, vr=%d\n",
+ __func__, llc_sk(sk)->state, ns, vr);
+ return rc;
+}
+
+int llc_conn_ev_rx_rej_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_REJ ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rej_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_REJ ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rej_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+
+ return 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_REJ ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rej_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+
+ 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_REJ ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rej_rsp_fbit_set_x(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
+
+ return LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_S(pdu) &&
+ LLC_S_PDU_RSP(pdu) == LLC_2_PDU_RSP_REJ ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rnr_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_RNR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rnr_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_RNR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rnr_rsp_fbit_set_0(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+
+ return 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_RNR ? 0 : 1;
+}
+
+int llc_conn_ev_rx_rnr_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb)
+{
+ const struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
+
+ 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;
+}
+
+/**
+ * llc_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);
+}
+
+/**
+ * llc_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;
+}