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net/nfc/llcp_core.c
34 KB
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * Copyright (C) 2011 Intel Corporation. All rights reserved. |
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* Copyright (C) 2014 Marvell International Ltd. |
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*/ #define pr_fmt(fmt) "llcp: %s: " fmt, __func__ #include <linux/init.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/nfc.h> |
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#include "nfc.h" |
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#include "llcp.h" static u8 llcp_magic[3] = {0x46, 0x66, 0x6d}; |
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static LIST_HEAD(llcp_devices); |
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|
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static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb); |
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void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *sk) |
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{ |
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write_lock(&l->lock); sk_add_node(sk, &l->head); write_unlock(&l->lock); } |
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|
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void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk) { write_lock(&l->lock); sk_del_node_init(sk); write_unlock(&l->lock); } |
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void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock) { sock->remote_rw = LLCP_DEFAULT_RW; sock->remote_miu = LLCP_MAX_MIU + 1; } |
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static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock) { struct nfc_llcp_local *local = sock->local; struct sk_buff *s, *tmp; pr_debug("%p ", &sock->sk); skb_queue_purge(&sock->tx_queue); skb_queue_purge(&sock->tx_pending_queue); |
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if (local == NULL) return; /* Search for local pending SKBs that are related to this socket */ skb_queue_walk_safe(&local->tx_queue, s, tmp) { if (s->sk != &sock->sk) continue; skb_unlink(s, &local->tx_queue); kfree_skb(s); } } |
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static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool device, |
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int err) |
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{ struct sock *sk; |
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struct hlist_node *tmp; |
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struct nfc_llcp_sock *llcp_sock; |
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|
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skb_queue_purge(&local->tx_queue); |
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write_lock(&local->sockets.lock); |
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|
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sk_for_each_safe(sk, tmp, &local->sockets.head) { |
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llcp_sock = nfc_llcp_sock(sk); |
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|
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bh_lock_sock(sk); |
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|
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nfc_llcp_socket_purge(llcp_sock); |
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if (sk->sk_state == LLCP_CONNECTED) nfc_put_device(llcp_sock->dev); |
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|
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if (sk->sk_state == LLCP_LISTEN) { |
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struct nfc_llcp_sock *lsk, *n; struct sock *accept_sk; |
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list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue, |
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accept_queue) { |
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accept_sk = &lsk->sk; |
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bh_lock_sock(accept_sk); |
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nfc_llcp_accept_unlink(accept_sk); |
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if (err) accept_sk->sk_err = err; |
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accept_sk->sk_state = LLCP_CLOSED; |
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accept_sk->sk_state_change(sk); |
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|
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bh_unlock_sock(accept_sk); |
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} |
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} |
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if (err) sk->sk_err = err; |
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sk->sk_state = LLCP_CLOSED; |
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sk->sk_state_change(sk); |
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|
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bh_unlock_sock(sk); |
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|
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sk_del_node_init(sk); |
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} |
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write_unlock(&local->sockets.lock); |
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|
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/* If we still have a device, we keep the RAW sockets alive */ if (device == true) |
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return; write_lock(&local->raw_sockets.lock); sk_for_each_safe(sk, tmp, &local->raw_sockets.head) { llcp_sock = nfc_llcp_sock(sk); bh_lock_sock(sk); nfc_llcp_socket_purge(llcp_sock); |
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if (err) sk->sk_err = err; |
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sk->sk_state = LLCP_CLOSED; |
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sk->sk_state_change(sk); bh_unlock_sock(sk); |
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sk_del_node_init(sk); } write_unlock(&local->raw_sockets.lock); |
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} |
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struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local) { kref_get(&local->ref); return local; } |
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static void local_cleanup(struct nfc_llcp_local *local) |
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{ |
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nfc_llcp_socket_release(local, false, ENXIO); |
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del_timer_sync(&local->link_timer); skb_queue_purge(&local->tx_queue); |
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cancel_work_sync(&local->tx_work); cancel_work_sync(&local->rx_work); cancel_work_sync(&local->timeout_work); |
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kfree_skb(local->rx_pending); |
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del_timer_sync(&local->sdreq_timer); cancel_work_sync(&local->sdreq_timeout_work); |
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nfc_llcp_free_sdp_tlv_list(&local->pending_sdreqs); |
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} static void local_release(struct kref *ref) { struct nfc_llcp_local *local; local = container_of(ref, struct nfc_llcp_local, ref); list_del(&local->list); |
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local_cleanup(local); |
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kfree(local); } int nfc_llcp_local_put(struct nfc_llcp_local *local) { |
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if (local == NULL) return 0; |
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return kref_put(&local->ref, local_release); } |
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static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local, u8 ssap, u8 dsap) { struct sock *sk; |
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struct nfc_llcp_sock *llcp_sock, *tmp_sock; |
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pr_debug("ssap dsap %d %d ", ssap, dsap); if (ssap == 0 && dsap == 0) return NULL; read_lock(&local->sockets.lock); llcp_sock = NULL; |
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sk_for_each(sk, &local->sockets.head) { |
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tmp_sock = nfc_llcp_sock(sk); |
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|
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if (tmp_sock->ssap == ssap && tmp_sock->dsap == dsap) { llcp_sock = tmp_sock; |
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break; |
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} |
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} read_unlock(&local->sockets.lock); if (llcp_sock == NULL) return NULL; sock_hold(&llcp_sock->sk); return llcp_sock; } static void nfc_llcp_sock_put(struct nfc_llcp_sock *sock) { sock_put(&sock->sk); } |
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static void nfc_llcp_timeout_work(struct work_struct *work) { struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, |
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timeout_work); |
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nfc_dep_link_down(local->dev); } |
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static void nfc_llcp_symm_timer(struct timer_list *t) |
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{ |
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struct nfc_llcp_local *local = from_timer(local, t, link_timer); |
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pr_err("SYMM timeout "); |
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schedule_work(&local->timeout_work); |
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} |
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static void nfc_llcp_sdreq_timeout_work(struct work_struct *work) { unsigned long time; HLIST_HEAD(nl_sdres_list); struct hlist_node *n; struct nfc_llcp_sdp_tlv *sdp; struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, sdreq_timeout_work); mutex_lock(&local->sdreq_lock); time = jiffies - msecs_to_jiffies(3 * local->remote_lto); hlist_for_each_entry_safe(sdp, n, &local->pending_sdreqs, node) { if (time_after(sdp->time, time)) continue; sdp->sap = LLCP_SDP_UNBOUND; hlist_del(&sdp->node); hlist_add_head(&sdp->node, &nl_sdres_list); } if (!hlist_empty(&local->pending_sdreqs)) mod_timer(&local->sdreq_timer, jiffies + msecs_to_jiffies(3 * local->remote_lto)); mutex_unlock(&local->sdreq_lock); if (!hlist_empty(&nl_sdres_list)) nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list); } |
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static void nfc_llcp_sdreq_timer(struct timer_list *t) |
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{ |
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struct nfc_llcp_local *local = from_timer(local, t, sdreq_timer); |
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schedule_work(&local->sdreq_timeout_work); } |
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struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev) { |
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struct nfc_llcp_local *local; |
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|
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list_for_each_entry(local, &llcp_devices, list) |
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if (local->dev == dev) return local; pr_debug("No device found "); return NULL; } static char *wks[] = { NULL, NULL, /* SDP */ "urn:nfc:sn:ip", "urn:nfc:sn:obex", "urn:nfc:sn:snep", }; static int nfc_llcp_wks_sap(char *service_name, size_t service_name_len) { int sap, num_wks; pr_debug("%s ", service_name); if (service_name == NULL) return -EINVAL; num_wks = ARRAY_SIZE(wks); |
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for (sap = 0; sap < num_wks; sap++) { |
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if (wks[sap] == NULL) continue; if (strncmp(wks[sap], service_name, service_name_len) == 0) return sap; } return -EINVAL; } |
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static struct nfc_llcp_sock *nfc_llcp_sock_from_sn(struct nfc_llcp_local *local, u8 *sn, size_t sn_len) { struct sock *sk; |
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struct nfc_llcp_sock *llcp_sock, *tmp_sock; pr_debug("sn %zd %p ", sn_len, sn); if (sn == NULL || sn_len == 0) return NULL; read_lock(&local->sockets.lock); llcp_sock = NULL; |
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sk_for_each(sk, &local->sockets.head) { |
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tmp_sock = nfc_llcp_sock(sk); pr_debug("llcp sock %p ", tmp_sock); |
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if (tmp_sock->sk.sk_type == SOCK_STREAM && tmp_sock->sk.sk_state != LLCP_LISTEN) continue; if (tmp_sock->sk.sk_type == SOCK_DGRAM && tmp_sock->sk.sk_state != LLCP_BOUND) |
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continue; if (tmp_sock->service_name == NULL || tmp_sock->service_name_len == 0) continue; if (tmp_sock->service_name_len != sn_len) continue; if (memcmp(sn, tmp_sock->service_name, sn_len) == 0) { llcp_sock = tmp_sock; break; } } read_unlock(&local->sockets.lock); pr_debug("Found llcp sock %p ", llcp_sock); return llcp_sock; } |
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u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
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struct nfc_llcp_sock *sock) |
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{ mutex_lock(&local->sdp_lock); if (sock->service_name != NULL && sock->service_name_len > 0) { int ssap = nfc_llcp_wks_sap(sock->service_name, |
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sock->service_name_len); |
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if (ssap > 0) { pr_debug("WKS %d ", ssap); /* This is a WKS, let's check if it's free */ if (local->local_wks & BIT(ssap)) { mutex_unlock(&local->sdp_lock); return LLCP_SAP_MAX; } |
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set_bit(ssap, &local->local_wks); |
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mutex_unlock(&local->sdp_lock); return ssap; } /* |
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* Check if there already is a non WKS socket bound * to this service name. |
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*/ |
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if (nfc_llcp_sock_from_sn(local, sock->service_name, sock->service_name_len) != NULL) { |
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mutex_unlock(&local->sdp_lock); return LLCP_SAP_MAX; } |
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mutex_unlock(&local->sdp_lock); |
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return LLCP_SDP_UNBOUND; |
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|
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} else if (sock->ssap != 0 && sock->ssap < LLCP_WKS_NUM_SAP) { if (!test_bit(sock->ssap, &local->local_wks)) { set_bit(sock->ssap, &local->local_wks); mutex_unlock(&local->sdp_lock); |
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|
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return sock->ssap; |
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} } mutex_unlock(&local->sdp_lock); return LLCP_SAP_MAX; } u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local) { u8 local_ssap; mutex_lock(&local->sdp_lock); local_ssap = find_first_zero_bit(&local->local_sap, LLCP_LOCAL_NUM_SAP); if (local_ssap == LLCP_LOCAL_NUM_SAP) { mutex_unlock(&local->sdp_lock); return LLCP_SAP_MAX; } |
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set_bit(local_ssap, &local->local_sap); |
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mutex_unlock(&local->sdp_lock); return local_ssap + LLCP_LOCAL_SAP_OFFSET; } void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap) { u8 local_ssap; unsigned long *sdp; if (ssap < LLCP_WKS_NUM_SAP) { local_ssap = ssap; sdp = &local->local_wks; } else if (ssap < LLCP_LOCAL_NUM_SAP) { |
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atomic_t *client_cnt; |
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local_ssap = ssap - LLCP_WKS_NUM_SAP; sdp = &local->local_sdp; |
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client_cnt = &local->local_sdp_cnt[local_ssap]; pr_debug("%d clients ", atomic_read(client_cnt)); mutex_lock(&local->sdp_lock); if (atomic_dec_and_test(client_cnt)) { struct nfc_llcp_sock *l_sock; pr_debug("No more clients for SAP %d ", ssap); clear_bit(local_ssap, sdp); /* Find the listening sock and set it back to UNBOUND */ l_sock = nfc_llcp_sock_get(local, ssap, LLCP_SAP_SDP); if (l_sock) { l_sock->ssap = LLCP_SDP_UNBOUND; nfc_llcp_sock_put(l_sock); } } mutex_unlock(&local->sdp_lock); return; |
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} else if (ssap < LLCP_MAX_SAP) { local_ssap = ssap - LLCP_LOCAL_NUM_SAP; sdp = &local->local_sap; } else { return; } mutex_lock(&local->sdp_lock); |
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clear_bit(local_ssap, sdp); |
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mutex_unlock(&local->sdp_lock); } |
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static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local) { u8 ssap; mutex_lock(&local->sdp_lock); ssap = find_first_zero_bit(&local->local_sdp, LLCP_SDP_NUM_SAP); if (ssap == LLCP_SDP_NUM_SAP) { mutex_unlock(&local->sdp_lock); return LLCP_SAP_MAX; } pr_debug("SDP ssap %d ", LLCP_WKS_NUM_SAP + ssap); set_bit(ssap, &local->local_sdp); mutex_unlock(&local->sdp_lock); return LLCP_WKS_NUM_SAP + ssap; } |
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static int nfc_llcp_build_gb(struct nfc_llcp_local *local) { |
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u8 *gb_cur, version, version_length; u8 lto_length, wks_length, miux_length; u8 *version_tlv = NULL, *lto_tlv = NULL, *wks_tlv = NULL, *miux_tlv = NULL; |
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__be16 wks = cpu_to_be16(local->local_wks); |
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u8 gb_len = 0; |
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int ret = 0; |
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version = LLCP_VERSION_11; version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version, |
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1, &version_length); |
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if (!version_tlv) { ret = -ENOMEM; goto out; } |
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gb_len += version_length; |
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lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, <o_length); |
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if (!lto_tlv) { ret = -ENOMEM; goto out; } |
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gb_len += lto_length; pr_debug("Local wks 0x%lx ", local->local_wks); |
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wks_tlv = nfc_llcp_build_tlv(LLCP_TLV_WKS, (u8 *)&wks, 2, &wks_length); |
58bdd544e net: nfc: Fix NUL... |
524 525 526 527 |
if (!wks_tlv) { ret = -ENOMEM; goto out; } |
d646960f7 NFC: Initial LLCP... |
528 |
gb_len += wks_length; |
52feb444a NFC: Extend netli... |
529 |
miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0, |
56d5876a2 NFC: Add MIUX to ... |
530 |
&miux_length); |
58bdd544e net: nfc: Fix NUL... |
531 532 533 534 |
if (!miux_tlv) { ret = -ENOMEM; goto out; } |
56d5876a2 NFC: Add MIUX to ... |
535 |
gb_len += miux_length; |
d646960f7 NFC: Initial LLCP... |
536 537 538 |
gb_len += ARRAY_SIZE(llcp_magic); if (gb_len > NFC_MAX_GT_LEN) { |
52da2449e NFC: Fix possible... |
539 540 |
ret = -EINVAL; goto out; |
d646960f7 NFC: Initial LLCP... |
541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 |
} gb_cur = local->gb; memcpy(gb_cur, llcp_magic, ARRAY_SIZE(llcp_magic)); gb_cur += ARRAY_SIZE(llcp_magic); memcpy(gb_cur, version_tlv, version_length); gb_cur += version_length; memcpy(gb_cur, lto_tlv, lto_length); gb_cur += lto_length; memcpy(gb_cur, wks_tlv, wks_length); gb_cur += wks_length; |
56d5876a2 NFC: Add MIUX to ... |
556 557 |
memcpy(gb_cur, miux_tlv, miux_length); gb_cur += miux_length; |
52da2449e NFC: Fix possible... |
558 559 560 |
local->gb_len = gb_len; out: |
d646960f7 NFC: Initial LLCP... |
561 562 |
kfree(version_tlv); kfree(lto_tlv); |
52da2449e NFC: Fix possible... |
563 564 |
kfree(wks_tlv); kfree(miux_tlv); |
d646960f7 NFC: Initial LLCP... |
565 |
|
52da2449e NFC: Fix possible... |
566 |
return ret; |
d646960f7 NFC: Initial LLCP... |
567 |
} |
b8e7a06d9 NFC: Build LLCP g... |
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 |
u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len) { struct nfc_llcp_local *local; local = nfc_llcp_find_local(dev); if (local == NULL) { *general_bytes_len = 0; return NULL; } nfc_llcp_build_gb(local); *general_bytes_len = local->gb_len; return local->gb; } |
d646960f7 NFC: Initial LLCP... |
584 585 |
int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len) { |
3143a4ca6 NFC: Move checkin... |
586 587 588 589 |
struct nfc_llcp_local *local; if (gb_len < 3 || gb_len > NFC_MAX_GT_LEN) return -EINVAL; |
d646960f7 NFC: Initial LLCP... |
590 |
|
3143a4ca6 NFC: Move checkin... |
591 |
local = nfc_llcp_find_local(dev); |
d646960f7 NFC: Initial LLCP... |
592 593 594 595 596 597 598 599 600 |
if (local == NULL) { pr_err("No LLCP device "); return -ENODEV; } memset(local->remote_gb, 0, NFC_MAX_GT_LEN); memcpy(local->remote_gb, gb, gb_len); local->remote_gb_len = gb_len; |
d646960f7 NFC: Initial LLCP... |
601 602 603 604 605 |
if (memcmp(local->remote_gb, llcp_magic, 3)) { pr_err("MAC does not support LLCP "); return -EINVAL; } |
7a06e586b NFC: Move LLCP re... |
606 607 608 |
return nfc_llcp_parse_gb_tlv(local, &local->remote_gb[3], local->remote_gb_len - 3); |
d646960f7 NFC: Initial LLCP... |
609 |
} |
d646960f7 NFC: Initial LLCP... |
610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 |
static u8 nfc_llcp_dsap(struct sk_buff *pdu) { return (pdu->data[0] & 0xfc) >> 2; } static u8 nfc_llcp_ptype(struct sk_buff *pdu) { return ((pdu->data[0] & 0x03) << 2) | ((pdu->data[1] & 0xc0) >> 6); } static u8 nfc_llcp_ssap(struct sk_buff *pdu) { return pdu->data[1] & 0x3f; } static u8 nfc_llcp_ns(struct sk_buff *pdu) { return pdu->data[2] >> 4; } static u8 nfc_llcp_nr(struct sk_buff *pdu) { return pdu->data[2] & 0xf; } static void nfc_llcp_set_nrns(struct nfc_llcp_sock *sock, struct sk_buff *pdu) { |
279cf174a NFC: No need to a... |
637 |
pdu->data[2] = (sock->send_n << 4) | (sock->recv_n); |
d646960f7 NFC: Initial LLCP... |
638 639 640 |
sock->send_n = (sock->send_n + 1) % 16; sock->recv_ack_n = (sock->recv_n - 1) % 16; } |
4463523be NFC: LLCP raw soc... |
641 642 643 |
void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, struct sk_buff *skb, u8 direction) { |
4463523be NFC: LLCP raw soc... |
644 645 646 647 648 |
struct sk_buff *skb_copy = NULL, *nskb; struct sock *sk; u8 *data; read_lock(&local->raw_sockets.lock); |
b67bfe0d4 hlist: drop the n... |
649 |
sk_for_each(sk, &local->raw_sockets.head) { |
4463523be NFC: LLCP raw soc... |
650 651 652 653 |
if (sk->sk_state != LLCP_BOUND) continue; if (skb_copy == NULL) { |
bad93e9d4 net: add __pskb_c... |
654 655 |
skb_copy = __pskb_copy_fclone(skb, NFC_RAW_HEADER_SIZE, GFP_ATOMIC, true); |
4463523be NFC: LLCP raw soc... |
656 657 658 |
if (skb_copy == NULL) continue; |
57be1f3f3 NFC: Add RAW sock... |
659 |
data = skb_push(skb_copy, NFC_RAW_HEADER_SIZE); |
4463523be NFC: LLCP raw soc... |
660 661 |
data[0] = local->dev ? local->dev->idx : 0xFF; |
57be1f3f3 NFC: Add RAW sock... |
662 663 |
data[1] = direction & 0x01; data[1] |= (RAW_PAYLOAD_LLCP << 1); |
4463523be NFC: LLCP raw soc... |
664 665 666 667 668 669 670 671 672 673 674 675 676 677 |
} nskb = skb_clone(skb_copy, GFP_ATOMIC); if (!nskb) continue; if (sock_queue_rcv_skb(sk, nskb)) kfree_skb(nskb); } read_unlock(&local->raw_sockets.lock); kfree_skb(skb_copy); } |
844579603 NFC: Requeue lost... |
678 679 680 681 682 683 684 685 686 687 688 689 |
static void nfc_llcp_tx_work(struct work_struct *work) { struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, tx_work); struct sk_buff *skb; struct sock *sk; struct nfc_llcp_sock *llcp_sock; skb = skb_dequeue(&local->tx_queue); if (skb != NULL) { sk = skb->sk; llcp_sock = nfc_llcp_sock(sk); |
a6a0915f8 NFC: Avoid fallin... |
690 691 |
if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) { |
f1b79dc89 NFC: Fix a potent... |
692 |
kfree_skb(skb); |
a6a0915f8 NFC: Avoid fallin... |
693 |
nfc_llcp_send_symm(local->dev); |
2635a4bdf NFC: llcp: Do not... |
694 695 696 |
} else if (llcp_sock && !llcp_sock->remote_ready) { skb_queue_head(&local->tx_queue, skb); nfc_llcp_send_symm(local->dev); |
a6a0915f8 NFC: Avoid fallin... |
697 |
} else { |
be02b6b62 NFC: Queue a copy... |
698 699 |
struct sk_buff *copy_skb = NULL; u8 ptype = nfc_llcp_ptype(skb); |
844579603 NFC: Requeue lost... |
700 701 702 703 |
int ret; pr_debug("Sending pending skb "); |
806bfe31c NFC: llcp: Use dy... |
704 705 |
print_hex_dump_debug("LLCP Tx: ", DUMP_PREFIX_OFFSET, 16, 1, skb->data, skb->len, true); |
844579603 NFC: Requeue lost... |
706 |
|
17f7ae16a NFC: Keep socket ... |
707 708 709 710 711 712 |
if (ptype == LLCP_PDU_DISC && sk != NULL && sk->sk_state == LLCP_DISCONNECTING) { nfc_llcp_sock_unlink(&local->sockets, sk); sock_orphan(sk); sock_put(sk); } |
be02b6b62 NFC: Queue a copy... |
713 714 |
if (ptype == LLCP_PDU_I) copy_skb = skb_copy(skb, GFP_ATOMIC); |
2c2d45bdc NFC: Add support ... |
715 |
__net_timestamp(skb); |
4463523be NFC: LLCP raw soc... |
716 |
nfc_llcp_send_to_raw_sock(local, skb, |
57be1f3f3 NFC: Add RAW sock... |
717 |
NFC_DIRECTION_TX); |
4463523be NFC: LLCP raw soc... |
718 |
|
844579603 NFC: Requeue lost... |
719 720 |
ret = nfc_data_exchange(local->dev, local->target_idx, skb, nfc_llcp_recv, local); |
be02b6b62 NFC: Queue a copy... |
721 722 723 |
if (ret) { kfree_skb(copy_skb); goto out; |
844579603 NFC: Requeue lost... |
724 |
} |
be02b6b62 NFC: Queue a copy... |
725 726 727 728 |
if (ptype == LLCP_PDU_I && copy_skb) skb_queue_tail(&llcp_sock->tx_pending_queue, copy_skb); |
844579603 NFC: Requeue lost... |
729 730 731 732 |
} } else { nfc_llcp_send_symm(local->dev); } |
be02b6b62 NFC: Queue a copy... |
733 |
out: |
844579603 NFC: Requeue lost... |
734 735 736 |
mod_timer(&local->link_timer, jiffies + msecs_to_jiffies(2 * local->remote_lto)); } |
a69f32af8 NFC: Socket linke... |
737 738 739 740 741 |
static struct nfc_llcp_sock *nfc_llcp_connecting_sock_get(struct nfc_llcp_local *local, u8 ssap) { struct sock *sk; struct nfc_llcp_sock *llcp_sock; |
a69f32af8 NFC: Socket linke... |
742 743 |
read_lock(&local->connecting_sockets.lock); |
b67bfe0d4 hlist: drop the n... |
744 |
sk_for_each(sk, &local->connecting_sockets.head) { |
a69f32af8 NFC: Socket linke... |
745 |
llcp_sock = nfc_llcp_sock(sk); |
5a0f6f3b4 NFC: Don't hold a... |
746 747 |
if (llcp_sock->ssap == ssap) { sock_hold(&llcp_sock->sk); |
a69f32af8 NFC: Socket linke... |
748 |
goto out; |
5a0f6f3b4 NFC: Don't hold a... |
749 |
} |
a69f32af8 NFC: Socket linke... |
750 751 752 753 754 755 |
} llcp_sock = NULL; out: read_unlock(&local->connecting_sockets.lock); |
a69f32af8 NFC: Socket linke... |
756 757 |
return llcp_sock; } |
a69f32af8 NFC: Socket linke... |
758 759 760 |
static struct nfc_llcp_sock *nfc_llcp_sock_get_sn(struct nfc_llcp_local *local, u8 *sn, size_t sn_len) { |
a69f32af8 NFC: Socket linke... |
761 |
struct nfc_llcp_sock *llcp_sock; |
8f50020ed NFC: LLCP late bi... |
762 |
llcp_sock = nfc_llcp_sock_from_sn(local, sn, sn_len); |
d646960f7 NFC: Initial LLCP... |
763 |
|
a69f32af8 NFC: Socket linke... |
764 765 |
if (llcp_sock == NULL) return NULL; |
d646960f7 NFC: Initial LLCP... |
766 |
|
a69f32af8 NFC: Socket linke... |
767 768 769 |
sock_hold(&llcp_sock->sk); return llcp_sock; |
d646960f7 NFC: Initial LLCP... |
770 |
} |
d646960f7 NFC: Initial LLCP... |
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 |
static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len) { u8 *tlv = &skb->data[2], type, length; size_t tlv_array_len = skb->len - LLCP_HEADER_SIZE, offset = 0; while (offset < tlv_array_len) { type = tlv[0]; length = tlv[1]; pr_debug("type 0x%x length %d ", type, length); if (type == LLCP_TLV_SN) { *sn_len = length; return &tlv[2]; } offset += length + 2; tlv += length + 2; } return NULL; } |
968272bf0 NFC: Handle LLCP ... |
794 795 796 797 798 799 800 801 802 803 804 805 806 |
static void nfc_llcp_recv_ui(struct nfc_llcp_local *local, struct sk_buff *skb) { struct nfc_llcp_sock *llcp_sock; struct nfc_llcp_ui_cb *ui_cb; u8 dsap, ssap; dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); ui_cb = nfc_llcp_ui_skb_cb(skb); ui_cb->dsap = dsap; ui_cb->ssap = ssap; |
968272bf0 NFC: Handle LLCP ... |
807 808 809 810 811 812 813 814 815 816 |
pr_debug("%d %d ", dsap, ssap); /* We're looking for a bound socket, not a client one */ llcp_sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP); if (llcp_sock == NULL || llcp_sock->sk.sk_type != SOCK_DGRAM) return; /* There is no sequence with UI frames */ skb_pull(skb, LLCP_HEADER_SIZE); |
1727cf937 NFC: llcp: Fix Rx... |
817 818 819 820 821 822 823 824 825 |
if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) { /* * UI frames will be freed from the socket layer, so we * need to keep them alive until someone receives them. */ skb_get(skb); } else { pr_err("Receive queue is full "); |
968272bf0 NFC: Handle LLCP ... |
826 827 828 829 |
} nfc_llcp_sock_put(llcp_sock); } |
d646960f7 NFC: Initial LLCP... |
830 |
static void nfc_llcp_recv_connect(struct nfc_llcp_local *local, |
427a2eb1f NFC: LLCP code id... |
831 |
struct sk_buff *skb) |
d646960f7 NFC: Initial LLCP... |
832 833 834 |
{ struct sock *new_sk, *parent; struct nfc_llcp_sock *sock, *new_sock; |
a69f32af8 NFC: Socket linke... |
835 |
u8 dsap, ssap, reason; |
d646960f7 NFC: Initial LLCP... |
836 837 838 839 840 841 |
dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); pr_debug("%d %d ", dsap, ssap); |
d646960f7 NFC: Initial LLCP... |
842 |
if (dsap != LLCP_SAP_SDP) { |
a69f32af8 NFC: Socket linke... |
843 844 |
sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP); if (sock == NULL || sock->sk.sk_state != LLCP_LISTEN) { |
d646960f7 NFC: Initial LLCP... |
845 846 847 |
reason = LLCP_DM_NOBOUND; goto fail; } |
d646960f7 NFC: Initial LLCP... |
848 849 850 851 852 853 854 855 856 857 858 859 |
} else { u8 *sn; size_t sn_len; sn = nfc_llcp_connect_sn(skb, &sn_len); if (sn == NULL) { reason = LLCP_DM_NOBOUND; goto fail; } pr_debug("Service name length %zu ", sn_len); |
a69f32af8 NFC: Socket linke... |
860 861 862 863 |
sock = nfc_llcp_sock_get_sn(local, sn, sn_len); if (sock == NULL) { reason = LLCP_DM_NOBOUND; goto fail; |
d646960f7 NFC: Initial LLCP... |
864 |
} |
d646960f7 NFC: Initial LLCP... |
865 |
} |
a69f32af8 NFC: Socket linke... |
866 |
lock_sock(&sock->sk); |
d646960f7 NFC: Initial LLCP... |
867 |
|
d646960f7 NFC: Initial LLCP... |
868 869 870 871 872 873 874 875 |
parent = &sock->sk; if (sk_acceptq_is_full(parent)) { reason = LLCP_DM_REJ; release_sock(&sock->sk); sock_put(&sock->sk); goto fail; } |
8f50020ed NFC: LLCP late bi... |
876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 |
if (sock->ssap == LLCP_SDP_UNBOUND) { u8 ssap = nfc_llcp_reserve_sdp_ssap(local); pr_debug("First client, reserving %d ", ssap); if (ssap == LLCP_SAP_MAX) { reason = LLCP_DM_REJ; release_sock(&sock->sk); sock_put(&sock->sk); goto fail; } sock->ssap = ssap; } |
11aa9c28b net: Pass kern fr... |
891 |
new_sk = nfc_llcp_sock_alloc(NULL, parent->sk_type, GFP_ATOMIC, 0); |
d646960f7 NFC: Initial LLCP... |
892 893 894 895 896 897 898 899 900 |
if (new_sk == NULL) { reason = LLCP_DM_REJ; release_sock(&sock->sk); sock_put(&sock->sk); goto fail; } new_sock = nfc_llcp_sock(new_sk); new_sock->dev = local->dev; |
c7aa12252 NFC: Take a refer... |
901 |
new_sock->local = nfc_llcp_local_get(local); |
06d44f806 NFC: llcp: Use so... |
902 903 |
new_sock->rw = sock->rw; new_sock->miux = sock->miux; |
d646960f7 NFC: Initial LLCP... |
904 |
new_sock->nfc_protocol = sock->nfc_protocol; |
d646960f7 NFC: Initial LLCP... |
905 |
new_sock->dsap = ssap; |
025f15204 NFC: Update LLCP ... |
906 |
new_sock->target_idx = local->target_idx; |
d646960f7 NFC: Initial LLCP... |
907 |
new_sock->parent = parent; |
8f50020ed NFC: LLCP late bi... |
908 909 910 911 912 913 914 915 916 917 918 919 920 |
new_sock->ssap = sock->ssap; if (sock->ssap < LLCP_LOCAL_NUM_SAP && sock->ssap >= LLCP_WKS_NUM_SAP) { atomic_t *client_count; pr_debug("reserved_ssap %d for %p ", sock->ssap, new_sock); client_count = &local->local_sdp_cnt[sock->ssap - LLCP_WKS_NUM_SAP]; atomic_inc(client_count); new_sock->reserved_ssap = sock->ssap; } |
d646960f7 NFC: Initial LLCP... |
921 |
|
7a06e586b NFC: Move LLCP re... |
922 923 |
nfc_llcp_parse_connection_tlv(new_sock, &skb->data[LLCP_HEADER_SIZE], skb->len - LLCP_HEADER_SIZE); |
d646960f7 NFC: Initial LLCP... |
924 925 |
pr_debug("new sock %p sk %p ", new_sock, &new_sock->sk); |
a69f32af8 NFC: Socket linke... |
926 |
nfc_llcp_sock_link(&local->sockets, new_sk); |
d646960f7 NFC: Initial LLCP... |
927 928 929 930 931 932 933 934 |
nfc_llcp_accept_enqueue(&sock->sk, new_sk); nfc_get_device(local->dev->idx); new_sk->sk_state = LLCP_CONNECTED; /* Wake the listening processes */ |
676d23690 net: Fix use afte... |
935 |
parent->sk_data_ready(parent); |
d646960f7 NFC: Initial LLCP... |
936 937 938 939 940 941 942 943 944 945 946 947 |
/* Send CC */ nfc_llcp_send_cc(new_sock); release_sock(&sock->sk); sock_put(&sock->sk); return; fail: /* Send DM */ nfc_llcp_send_dm(local, dsap, ssap, reason); |
d646960f7 NFC: Initial LLCP... |
948 |
} |
d094afa15 NFC: Send LLCP RR... |
949 |
int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock) |
4722d2b70 NFC: Factorize th... |
950 |
{ |
d094afa15 NFC: Send LLCP RR... |
951 |
int nr_frames = 0; |
4722d2b70 NFC: Factorize th... |
952 953 954 |
struct nfc_llcp_local *local = sock->local; pr_debug("Remote ready %d tx queue len %d remote rw %d", |
427a2eb1f NFC: LLCP code id... |
955 |
sock->remote_ready, skb_queue_len(&sock->tx_pending_queue), |
e4306bec4 NFC: llcp: Rename... |
956 |
sock->remote_rw); |
4722d2b70 NFC: Factorize th... |
957 958 959 |
/* Try to queue some I frames for transmission */ while (sock->remote_ready && |
e4306bec4 NFC: llcp: Rename... |
960 |
skb_queue_len(&sock->tx_pending_queue) < sock->remote_rw) { |
844579603 NFC: Requeue lost... |
961 |
struct sk_buff *pdu; |
4722d2b70 NFC: Factorize th... |
962 963 964 965 966 967 968 |
pdu = skb_dequeue(&sock->tx_queue); if (pdu == NULL) break; /* Update N(S)/N(R) */ nfc_llcp_set_nrns(sock, pdu); |
4722d2b70 NFC: Factorize th... |
969 |
skb_queue_tail(&local->tx_queue, pdu); |
d094afa15 NFC: Send LLCP RR... |
970 |
nr_frames++; |
4722d2b70 NFC: Factorize th... |
971 |
} |
d094afa15 NFC: Send LLCP RR... |
972 973 |
return nr_frames; |
4722d2b70 NFC: Factorize th... |
974 |
} |
d646960f7 NFC: Initial LLCP... |
975 |
static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local, |
427a2eb1f NFC: LLCP code id... |
976 |
struct sk_buff *skb) |
d646960f7 NFC: Initial LLCP... |
977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 |
{ struct nfc_llcp_sock *llcp_sock; struct sock *sk; u8 dsap, ssap, ptype, ns, nr; ptype = nfc_llcp_ptype(skb); dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); ns = nfc_llcp_ns(skb); nr = nfc_llcp_nr(skb); pr_debug("%d %d R %d S %d ", dsap, ssap, nr, ns); llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); if (llcp_sock == NULL) { nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); return; } sk = &llcp_sock->sk; lock_sock(sk); if (sk->sk_state == LLCP_CLOSED) { release_sock(sk); nfc_llcp_sock_put(llcp_sock); } |
d646960f7 NFC: Initial LLCP... |
1003 1004 1005 1006 |
/* Pass the payload upstream */ if (ptype == LLCP_PDU_I) { pr_debug("I frame, queueing on %p ", &llcp_sock->sk); |
53aef9205 NFC: Handle Recei... |
1007 1008 1009 1010 1011 |
if (ns == llcp_sock->recv_n) llcp_sock->recv_n = (llcp_sock->recv_n + 1) % 16; else pr_err("Received out of sequence I PDU "); |
d646960f7 NFC: Initial LLCP... |
1012 |
skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE); |
1727cf937 NFC: llcp: Fix Rx... |
1013 1014 1015 1016 1017 1018 1019 1020 1021 |
if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) { /* * I frames will be freed from the socket layer, so we * need to keep them alive until someone receives them. */ skb_get(skb); } else { pr_err("Receive queue is full "); |
d646960f7 NFC: Initial LLCP... |
1022 1023 1024 1025 1026 1027 |
} } /* Remove skbs from the pending queue */ if (llcp_sock->send_ack_n != nr) { struct sk_buff *s, *tmp; |
289814918 NFC: Fix incorrec... |
1028 |
u8 n; |
d646960f7 NFC: Initial LLCP... |
1029 1030 |
llcp_sock->send_ack_n = nr; |
844579603 NFC: Requeue lost... |
1031 1032 |
/* Remove and free all skbs until ns == nr */ skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) { |
289814918 NFC: Fix incorrec... |
1033 |
n = nfc_llcp_ns(s); |
844579603 NFC: Requeue lost... |
1034 1035 |
skb_unlink(s, &llcp_sock->tx_pending_queue); kfree_skb(s); |
289814918 NFC: Fix incorrec... |
1036 |
if (n == nr) |
844579603 NFC: Requeue lost... |
1037 1038 1039 1040 1041 1042 1043 1044 1045 |
break; } /* Re-queue the remaining skbs for transmission */ skb_queue_reverse_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) { skb_unlink(s, &llcp_sock->tx_pending_queue); skb_queue_head(&local->tx_queue, s); } |
d646960f7 NFC: Initial LLCP... |
1046 |
} |
53aef9205 NFC: Handle Recei... |
1047 1048 |
if (ptype == LLCP_PDU_RR) llcp_sock->remote_ready = true; |
427a2eb1f NFC: LLCP code id... |
1049 |
else if (ptype == LLCP_PDU_RNR) |
53aef9205 NFC: Handle Recei... |
1050 |
llcp_sock->remote_ready = false; |
56af2568c NFC: Send a recei... |
1051 |
if (nfc_llcp_queue_i_frames(llcp_sock) == 0 && ptype == LLCP_PDU_I) |
d094afa15 NFC: Send LLCP RR... |
1052 |
nfc_llcp_send_rr(llcp_sock); |
d646960f7 NFC: Initial LLCP... |
1053 1054 1055 1056 1057 1058 |
release_sock(sk); nfc_llcp_sock_put(llcp_sock); } static void nfc_llcp_recv_disc(struct nfc_llcp_local *local, |
427a2eb1f NFC: LLCP code id... |
1059 |
struct sk_buff *skb) |
d646960f7 NFC: Initial LLCP... |
1060 1061 1062 1063 1064 1065 1066 |
{ struct nfc_llcp_sock *llcp_sock; struct sock *sk; u8 dsap, ssap; dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); |
6d2cd978e NFC: llcp: Termin... |
1067 1068 1069 1070 1071 |
if ((dsap == 0) && (ssap == 0)) { pr_debug("Connection termination"); nfc_dep_link_down(local->dev); return; } |
d646960f7 NFC: Initial LLCP... |
1072 1073 1074 1075 1076 1077 1078 1079 |
llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); if (llcp_sock == NULL) { nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); return; } sk = &llcp_sock->sk; lock_sock(sk); |
f31652a58 NFC: Purge LLCP s... |
1080 1081 |
nfc_llcp_socket_purge(llcp_sock); |
d646960f7 NFC: Initial LLCP... |
1082 1083 1084 1085 |
if (sk->sk_state == LLCP_CLOSED) { release_sock(sk); nfc_llcp_sock_put(llcp_sock); } |
d646960f7 NFC: Initial LLCP... |
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 |
if (sk->sk_state == LLCP_CONNECTED) { nfc_put_device(local->dev); sk->sk_state = LLCP_CLOSED; sk->sk_state_change(sk); } nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_DISC); release_sock(sk); nfc_llcp_sock_put(llcp_sock); } |
427a2eb1f NFC: LLCP code id... |
1097 |
static void nfc_llcp_recv_cc(struct nfc_llcp_local *local, struct sk_buff *skb) |
d646960f7 NFC: Initial LLCP... |
1098 1099 |
{ struct nfc_llcp_sock *llcp_sock; |
ff353d86a NFC: LLCP connect... |
1100 |
struct sock *sk; |
d646960f7 NFC: Initial LLCP... |
1101 |
u8 dsap, ssap; |
d646960f7 NFC: Initial LLCP... |
1102 1103 |
dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); |
a69f32af8 NFC: Socket linke... |
1104 |
llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); |
d646960f7 NFC: Initial LLCP... |
1105 1106 1107 1108 1109 1110 1111 |
if (llcp_sock == NULL) { pr_err("Invalid CC "); nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); return; } |
ff353d86a NFC: LLCP connect... |
1112 |
sk = &llcp_sock->sk; |
d646960f7 NFC: Initial LLCP... |
1113 |
|
a69f32af8 NFC: Socket linke... |
1114 1115 1116 1117 |
/* Unlink from connecting and link to the client array */ nfc_llcp_sock_unlink(&local->connecting_sockets, sk); nfc_llcp_sock_link(&local->sockets, sk); llcp_sock->dsap = ssap; |
7a06e586b NFC: Move LLCP re... |
1118 1119 |
nfc_llcp_parse_connection_tlv(llcp_sock, &skb->data[LLCP_HEADER_SIZE], skb->len - LLCP_HEADER_SIZE); |
d646960f7 NFC: Initial LLCP... |
1120 |
|
ff353d86a NFC: LLCP connect... |
1121 1122 |
sk->sk_state = LLCP_CONNECTED; sk->sk_state_change(sk); |
d646960f7 NFC: Initial LLCP... |
1123 1124 |
nfc_llcp_sock_put(llcp_sock); } |
5c0560b7a NFC: Handle LLCP ... |
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 |
static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb) { struct nfc_llcp_sock *llcp_sock; struct sock *sk; u8 dsap, ssap, reason; dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); reason = skb->data[2]; pr_debug("%d %d reason %d ", ssap, dsap, reason); switch (reason) { case LLCP_DM_NOBOUND: case LLCP_DM_REJ: llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); break; default: llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); break; } if (llcp_sock == NULL) { |
a8df0f379 NFC: Return NULL ... |
1150 1151 |
pr_debug("Already closed "); |
5c0560b7a NFC: Handle LLCP ... |
1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 |
return; } sk = &llcp_sock->sk; sk->sk_err = ENXIO; sk->sk_state = LLCP_CLOSED; sk->sk_state_change(sk); nfc_llcp_sock_put(llcp_sock); |
5c0560b7a NFC: Handle LLCP ... |
1162 |
} |
19cfe5843 NFC: Initial SNL ... |
1163 1164 1165 1166 1167 1168 1169 1170 |
static void nfc_llcp_recv_snl(struct nfc_llcp_local *local, struct sk_buff *skb) { struct nfc_llcp_sock *llcp_sock; u8 dsap, ssap, *tlv, type, length, tid, sap; u16 tlv_len, offset; char *service_name; size_t service_name_len; |
e0ae7bac0 NFC: llcp: Servic... |
1171 1172 1173 |
struct nfc_llcp_sdp_tlv *sdp; HLIST_HEAD(llc_sdres_list); size_t sdres_tlvs_len; |
d9b8d8e19 NFC: llcp: Servic... |
1174 |
HLIST_HEAD(nl_sdres_list); |
19cfe5843 NFC: Initial SNL ... |
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 |
dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); pr_debug("%d %d ", dsap, ssap); if (dsap != LLCP_SAP_SDP || ssap != LLCP_SAP_SDP) { pr_err("Wrong SNL SAP "); return; } tlv = &skb->data[LLCP_HEADER_SIZE]; tlv_len = skb->len - LLCP_HEADER_SIZE; offset = 0; |
e0ae7bac0 NFC: llcp: Servic... |
1191 |
sdres_tlvs_len = 0; |
19cfe5843 NFC: Initial SNL ... |
1192 |
|
0f4507722 NFC: Fix some cod... |
1193 |
while (offset < tlv_len) { |
19cfe5843 NFC: Initial SNL ... |
1194 1195 1196 1197 1198 1199 1200 1201 |
type = tlv[0]; length = tlv[1]; switch (type) { case LLCP_TLV_SDREQ: tid = tlv[2]; service_name = (char *) &tlv[3]; service_name_len = length - 1; |
e6904081d NFC: Reserve LLCP... |
1202 1203 |
pr_debug("Looking for %.16s ", service_name); |
19cfe5843 NFC: Initial SNL ... |
1204 1205 1206 1207 1208 |
if (service_name_len == strlen("urn:nfc:sn:sdp") && !strncmp(service_name, "urn:nfc:sn:sdp", service_name_len)) { sap = 1; |
e0ae7bac0 NFC: llcp: Servic... |
1209 |
goto add_snl; |
e6904081d NFC: Reserve LLCP... |
1210 1211 1212 1213 1214 1215 |
} llcp_sock = nfc_llcp_sock_from_sn(local, service_name, service_name_len); if (!llcp_sock) { sap = 0; |
e0ae7bac0 NFC: llcp: Servic... |
1216 |
goto add_snl; |
e6904081d NFC: Reserve LLCP... |
1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 |
} /* * We found a socket but its ssap has not been reserved * yet. We need to assign it for good and send a reply. * The ssap will be freed when the socket is closed. */ if (llcp_sock->ssap == LLCP_SDP_UNBOUND) { atomic_t *client_count; sap = nfc_llcp_reserve_sdp_ssap(local); pr_debug("Reserving %d ", sap); if (sap == LLCP_SAP_MAX) { sap = 0; |
e0ae7bac0 NFC: llcp: Servic... |
1234 |
goto add_snl; |
e6904081d NFC: Reserve LLCP... |
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 |
} client_count = &local->local_sdp_cnt[sap - LLCP_WKS_NUM_SAP]; atomic_inc(client_count); llcp_sock->ssap = sap; llcp_sock->reserved_ssap = sap; |
19cfe5843 NFC: Initial SNL ... |
1245 |
} else { |
e6904081d NFC: Reserve LLCP... |
1246 |
sap = llcp_sock->ssap; |
19cfe5843 NFC: Initial SNL ... |
1247 |
} |
e6904081d NFC: Reserve LLCP... |
1248 1249 |
pr_debug("%p %d ", llcp_sock, sap); |
e0ae7bac0 NFC: llcp: Servic... |
1250 1251 1252 1253 1254 1255 1256 |
add_snl: sdp = nfc_llcp_build_sdres_tlv(tid, sap); if (sdp == NULL) goto exit; sdres_tlvs_len += sdp->tlv_len; hlist_add_head(&sdp->node, &llc_sdres_list); |
19cfe5843 NFC: Initial SNL ... |
1257 |
break; |
d9b8d8e19 NFC: llcp: Servic... |
1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 |
case LLCP_TLV_SDRES: mutex_lock(&local->sdreq_lock); pr_debug("LLCP_TLV_SDRES: searching tid %d ", tlv[2]); hlist_for_each_entry(sdp, &local->pending_sdreqs, node) { if (sdp->tid != tlv[2]) continue; sdp->sap = tlv[3]; pr_debug("Found: uri=%s, sap=%d ", sdp->uri, sdp->sap); hlist_del(&sdp->node); hlist_add_head(&sdp->node, &nl_sdres_list); break; } mutex_unlock(&local->sdreq_lock); break; |
19cfe5843 NFC: Initial SNL ... |
1283 1284 1285 1286 1287 1288 1289 1290 1291 |
default: pr_err("Invalid SNL tlv value 0x%x ", type); break; } offset += length + 2; tlv += length + 2; } |
e0ae7bac0 NFC: llcp: Servic... |
1292 1293 |
exit: |
d9b8d8e19 NFC: llcp: Servic... |
1294 1295 |
if (!hlist_empty(&nl_sdres_list)) nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list); |
e0ae7bac0 NFC: llcp: Servic... |
1296 1297 |
if (!hlist_empty(&llc_sdres_list)) nfc_llcp_send_snl_sdres(local, &llc_sdres_list, sdres_tlvs_len); |
19cfe5843 NFC: Initial SNL ... |
1298 |
} |
098dafcfb NFC: llcp: Aggreg... |
1299 |
static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb) |
d646960f7 NFC: Initial LLCP... |
1300 |
{ |
098dafcfb NFC: llcp: Aggreg... |
1301 1302 1303 |
u8 ptype; u16 pdu_len; struct sk_buff *new_skb; |
d646960f7 NFC: Initial LLCP... |
1304 |
|
098dafcfb NFC: llcp: Aggreg... |
1305 1306 1307 |
if (skb->len <= LLCP_HEADER_SIZE) { pr_err("Malformed AGF PDU "); |
d646960f7 NFC: Initial LLCP... |
1308 1309 |
return; } |
098dafcfb NFC: llcp: Aggreg... |
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 |
skb_pull(skb, LLCP_HEADER_SIZE); while (skb->len > LLCP_AGF_PDU_HEADER_SIZE) { pdu_len = skb->data[0] << 8 | skb->data[1]; skb_pull(skb, LLCP_AGF_PDU_HEADER_SIZE); if (pdu_len < LLCP_HEADER_SIZE || pdu_len > skb->len) { pr_err("Malformed AGF PDU "); return; } ptype = nfc_llcp_ptype(skb); if (ptype == LLCP_PDU_SYMM || ptype == LLCP_PDU_AGF) goto next; new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL); if (new_skb == NULL) { pr_err("Could not allocate PDU "); return; } |
59ae1d127 networking: intro... |
1334 |
skb_put_data(new_skb, skb->data, pdu_len); |
098dafcfb NFC: llcp: Aggreg... |
1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 |
nfc_llcp_rx_skb(local, new_skb); kfree_skb(new_skb); next: skb_pull(skb, pdu_len); } } static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb) { u8 dsap, ssap, ptype; |
d646960f7 NFC: Initial LLCP... |
1347 1348 1349 1350 1351 1352 |
ptype = nfc_llcp_ptype(skb); dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); pr_debug("ptype 0x%x dsap 0x%x ssap 0x%x ", ptype, dsap, ssap); |
4be646ecc NFC: Dump LLCP fr... |
1353 |
if (ptype != LLCP_PDU_SYMM) |
806bfe31c NFC: llcp: Use dy... |
1354 1355 |
print_hex_dump_debug("LLCP Rx: ", DUMP_PREFIX_OFFSET, 16, 1, skb->data, skb->len, true); |
4be646ecc NFC: Dump LLCP fr... |
1356 |
|
d646960f7 NFC: Initial LLCP... |
1357 1358 1359 1360 1361 |
switch (ptype) { case LLCP_PDU_SYMM: pr_debug("SYMM "); break; |
968272bf0 NFC: Handle LLCP ... |
1362 1363 1364 1365 1366 |
case LLCP_PDU_UI: pr_debug("UI "); nfc_llcp_recv_ui(local, skb); break; |
d646960f7 NFC: Initial LLCP... |
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 |
case LLCP_PDU_CONNECT: pr_debug("CONNECT "); nfc_llcp_recv_connect(local, skb); break; case LLCP_PDU_DISC: pr_debug("DISC "); nfc_llcp_recv_disc(local, skb); break; case LLCP_PDU_CC: pr_debug("CC "); nfc_llcp_recv_cc(local, skb); break; |
5c0560b7a NFC: Handle LLCP ... |
1384 1385 1386 1387 1388 |
case LLCP_PDU_DM: pr_debug("DM "); nfc_llcp_recv_dm(local, skb); break; |
19cfe5843 NFC: Initial SNL ... |
1389 1390 1391 1392 1393 |
case LLCP_PDU_SNL: pr_debug("SNL "); nfc_llcp_recv_snl(local, skb); break; |
d646960f7 NFC: Initial LLCP... |
1394 1395 |
case LLCP_PDU_I: case LLCP_PDU_RR: |
53aef9205 NFC: Handle Recei... |
1396 |
case LLCP_PDU_RNR: |
d646960f7 NFC: Initial LLCP... |
1397 1398 1399 1400 |
pr_debug("I frame "); nfc_llcp_recv_hdlc(local, skb); break; |
098dafcfb NFC: llcp: Aggreg... |
1401 1402 1403 1404 1405 |
case LLCP_PDU_AGF: pr_debug("AGF frame "); nfc_llcp_recv_agf(local, skb); break; |
d646960f7 NFC: Initial LLCP... |
1406 |
} |
098dafcfb NFC: llcp: Aggreg... |
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 |
} static void nfc_llcp_rx_work(struct work_struct *work) { struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, rx_work); struct sk_buff *skb; skb = local->rx_pending; if (skb == NULL) { pr_debug("No pending SKB "); return; } __net_timestamp(skb); |
57be1f3f3 NFC: Add RAW sock... |
1423 |
nfc_llcp_send_to_raw_sock(local, skb, NFC_DIRECTION_RX); |
098dafcfb NFC: llcp: Aggreg... |
1424 1425 |
nfc_llcp_rx_skb(local, skb); |
d646960f7 NFC: Initial LLCP... |
1426 |
|
916082b07 workqueue: avoid ... |
1427 |
schedule_work(&local->tx_work); |
d646960f7 NFC: Initial LLCP... |
1428 1429 |
kfree_skb(local->rx_pending); local->rx_pending = NULL; |
d646960f7 NFC: Initial LLCP... |
1430 |
} |
1727cf937 NFC: llcp: Fix Rx... |
1431 1432 1433 1434 1435 1436 |
static void __nfc_llcp_recv(struct nfc_llcp_local *local, struct sk_buff *skb) { local->rx_pending = skb; del_timer(&local->link_timer); schedule_work(&local->rx_work); } |
d646960f7 NFC: Initial LLCP... |
1437 1438 1439 1440 1441 1442 1443 |
void nfc_llcp_recv(void *data, struct sk_buff *skb, int err) { struct nfc_llcp_local *local = (struct nfc_llcp_local *) data; pr_debug("Received an LLCP PDU "); if (err < 0) { |
427a2eb1f NFC: LLCP code id... |
1444 1445 |
pr_err("err %d ", err); |
d646960f7 NFC: Initial LLCP... |
1446 1447 |
return; } |
1727cf937 NFC: llcp: Fix Rx... |
1448 |
__nfc_llcp_recv(local, skb); |
d646960f7 NFC: Initial LLCP... |
1449 |
} |
73167ced3 NFC: Introduce ta... |
1450 1451 1452 1453 1454 |
int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb) { struct nfc_llcp_local *local; local = nfc_llcp_find_local(dev); |
966efbfb0 NFC: Fix a memory... |
1455 1456 |
if (local == NULL) { kfree_skb(skb); |
73167ced3 NFC: Introduce ta... |
1457 |
return -ENODEV; |
966efbfb0 NFC: Fix a memory... |
1458 |
} |
73167ced3 NFC: Introduce ta... |
1459 |
|
1727cf937 NFC: llcp: Fix Rx... |
1460 |
__nfc_llcp_recv(local, skb); |
73167ced3 NFC: Introduce ta... |
1461 1462 1463 |
return 0; } |
d646960f7 NFC: Initial LLCP... |
1464 1465 1466 1467 1468 1469 1470 |
void nfc_llcp_mac_is_down(struct nfc_dev *dev) { struct nfc_llcp_local *local; local = nfc_llcp_find_local(dev); if (local == NULL) return; |
abd18d433 NFC: llcp: Reset ... |
1471 1472 |
local->remote_miu = LLCP_DEFAULT_MIU; local->remote_lto = LLCP_DEFAULT_LTO; |
d646960f7 NFC: Initial LLCP... |
1473 |
/* Close and purge all existing sockets */ |
3bbc0ceb7 NFC: llcp: Report... |
1474 |
nfc_llcp_socket_release(local, true, 0); |
d646960f7 NFC: Initial LLCP... |
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 |
} void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx, u8 comm_mode, u8 rf_mode) { struct nfc_llcp_local *local; pr_debug("rf mode %d ", rf_mode); local = nfc_llcp_find_local(dev); if (local == NULL) return; local->target_idx = target_idx; local->comm_mode = comm_mode; local->rf_mode = rf_mode; if (rf_mode == NFC_RF_INITIATOR) { pr_debug("Queueing Tx work "); |
916082b07 workqueue: avoid ... |
1496 |
schedule_work(&local->tx_work); |
d646960f7 NFC: Initial LLCP... |
1497 1498 |
} else { mod_timer(&local->link_timer, |
427a2eb1f NFC: LLCP code id... |
1499 |
jiffies + msecs_to_jiffies(local->remote_lto)); |
d646960f7 NFC: Initial LLCP... |
1500 1501 1502 1503 1504 |
} } int nfc_llcp_register_device(struct nfc_dev *ndev) { |
d646960f7 NFC: Initial LLCP... |
1505 |
struct nfc_llcp_local *local; |
d646960f7 NFC: Initial LLCP... |
1506 1507 1508 1509 1510 1511 1512 |
local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL); if (local == NULL) return -ENOMEM; local->dev = ndev; INIT_LIST_HEAD(&local->list); |
c7aa12252 NFC: Take a refer... |
1513 |
kref_init(&local->ref); |
d646960f7 NFC: Initial LLCP... |
1514 |
mutex_init(&local->sdp_lock); |
4b519bb49 NFC: Convert time... |
1515 |
timer_setup(&local->link_timer, nfc_llcp_symm_timer, 0); |
d646960f7 NFC: Initial LLCP... |
1516 1517 1518 |
skb_queue_head_init(&local->tx_queue); INIT_WORK(&local->tx_work, nfc_llcp_tx_work); |
d646960f7 NFC: Initial LLCP... |
1519 1520 1521 |
local->rx_pending = NULL; INIT_WORK(&local->rx_work, nfc_llcp_rx_work); |
d646960f7 NFC: Initial LLCP... |
1522 1523 |
INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work); |
d646960f7 NFC: Initial LLCP... |
1524 |
|
fe235b58d NFC: Use dynamic ... |
1525 1526 |
rwlock_init(&local->sockets.lock); rwlock_init(&local->connecting_sockets.lock); |
4463523be NFC: LLCP raw soc... |
1527 |
rwlock_init(&local->raw_sockets.lock); |
a69f32af8 NFC: Socket linke... |
1528 |
|
52feb444a NFC: Extend netli... |
1529 1530 1531 |
local->lto = 150; /* 1500 ms */ local->rw = LLCP_MAX_RW; local->miux = cpu_to_be16(LLCP_MAX_MIUX); |
f768b3401 NFC: llcp: Set th... |
1532 |
local->local_wks = 0x1; /* LLC Link Management */ |
52feb444a NFC: Extend netli... |
1533 |
|
d646960f7 NFC: Initial LLCP... |
1534 1535 1536 1537 |
nfc_llcp_build_gb(local); local->remote_miu = LLCP_DEFAULT_MIU; local->remote_lto = LLCP_DEFAULT_LTO; |
d646960f7 NFC: Initial LLCP... |
1538 |
|
d9b8d8e19 NFC: llcp: Servic... |
1539 1540 |
mutex_init(&local->sdreq_lock); INIT_HLIST_HEAD(&local->pending_sdreqs); |
4b519bb49 NFC: Convert time... |
1541 |
timer_setup(&local->sdreq_timer, nfc_llcp_sdreq_timer, 0); |
40213fa85 NFC: llcp: Add cl... |
1542 |
INIT_WORK(&local->sdreq_timeout_work, nfc_llcp_sdreq_timeout_work); |
d9b8d8e19 NFC: llcp: Servic... |
1543 |
|
16a78e9fe NFC: Fix nfc_llcp... |
1544 |
list_add(&local->list, &llcp_devices); |
d646960f7 NFC: Initial LLCP... |
1545 1546 |
return 0; |
d646960f7 NFC: Initial LLCP... |
1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 |
} void nfc_llcp_unregister_device(struct nfc_dev *dev) { struct nfc_llcp_local *local = nfc_llcp_find_local(dev); if (local == NULL) { pr_debug("No such device "); return; } |
c470e319b NFC: llcp: Remove... |
1558 |
local_cleanup(local); |
3536da06d NFC: llcp: Clean ... |
1559 |
|
c7aa12252 NFC: Take a refer... |
1560 |
nfc_llcp_local_put(local); |
d646960f7 NFC: Initial LLCP... |
1561 1562 1563 1564 |
} int __init nfc_llcp_init(void) { |
d646960f7 NFC: Initial LLCP... |
1565 1566 1567 1568 1569 1570 1571 |
return nfc_llcp_sock_init(); } void nfc_llcp_exit(void) { nfc_llcp_sock_exit(); } |