From 863981e96738983919de841ec669e157e6bdaeb0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Sun, 11 Sep 2016 04:34:46 -0300 Subject: Linux-libre 4.7.1-gnu --- net/nfc/nci/core.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++------- net/nfc/nci/ntf.c | 2 +- net/nfc/nci/rsp.c | 23 +++++++++-- 3 files changed, 123 insertions(+), 19 deletions(-) (limited to 'net/nfc') diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c index fbb7a2b57..61fff4224 100644 --- a/net/nfc/nci/core.c +++ b/net/nfc/nci/core.c @@ -64,18 +64,26 @@ struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev, return NULL; } -int nci_get_conn_info_by_id(struct nci_dev *ndev, u8 id) +int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type, + struct dest_spec_params *params) { struct nci_conn_info *conn_info; list_for_each_entry(conn_info, &ndev->conn_info_list, list) { - if (conn_info->id == id) - return conn_info->conn_id; + if (conn_info->dest_type == dest_type) { + if (!params) + return conn_info->conn_id; + if (conn_info) { + if (params->id == conn_info->dest_params->id && + params->protocol == conn_info->dest_params->protocol) + return conn_info->conn_id; + } + } } return -EINVAL; } -EXPORT_SYMBOL(nci_get_conn_info_by_id); +EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params); /* ---- NCI requests ---- */ @@ -392,6 +400,83 @@ int nci_core_init(struct nci_dev *ndev) } EXPORT_SYMBOL(nci_core_init); +struct nci_loopback_data { + u8 conn_id; + struct sk_buff *data; +}; + +static void nci_send_data_req(struct nci_dev *ndev, unsigned long opt) +{ + struct nci_loopback_data *data = (struct nci_loopback_data *)opt; + + nci_send_data(ndev, data->conn_id, data->data); +} + +static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err) +{ + struct nci_dev *ndev = (struct nci_dev *)context; + struct nci_conn_info *conn_info; + + conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id); + if (!conn_info) { + nci_req_complete(ndev, NCI_STATUS_REJECTED); + return; + } + + conn_info->rx_skb = skb; + + nci_req_complete(ndev, NCI_STATUS_OK); +} + +int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len, + struct sk_buff **resp) +{ + int r; + struct nci_loopback_data loopback_data; + struct nci_conn_info *conn_info; + struct sk_buff *skb; + int conn_id = nci_get_conn_info_by_dest_type_params(ndev, + NCI_DESTINATION_NFCC_LOOPBACK, NULL); + + if (conn_id < 0) { + r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK, + 0, 0, NULL); + if (r != NCI_STATUS_OK) + return r; + + conn_id = nci_get_conn_info_by_dest_type_params(ndev, + NCI_DESTINATION_NFCC_LOOPBACK, + NULL); + } + + conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id); + if (!conn_info) + return -EPROTO; + + /* store cb and context to be used on receiving data */ + conn_info->data_exchange_cb = nci_nfcc_loopback_cb; + conn_info->data_exchange_cb_context = ndev; + + skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + skb_reserve(skb, NCI_DATA_HDR_SIZE); + memcpy(skb_put(skb, data_len), data, data_len); + + loopback_data.conn_id = conn_id; + loopback_data.data = skb; + + ndev->cur_conn_id = conn_id; + r = nci_request(ndev, nci_send_data_req, (unsigned long)&loopback_data, + msecs_to_jiffies(NCI_DATA_TIMEOUT)); + if (r == NCI_STATUS_OK && resp) + *resp = conn_info->rx_skb; + + return r; +} +EXPORT_SYMBOL(nci_nfcc_loopback); + static int nci_open_device(struct nci_dev *ndev) { int rc = 0; @@ -610,9 +695,6 @@ int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type, struct nci_core_conn_create_cmd *cmd; struct core_conn_create_data data; - if (!number_destination_params) - return -EINVAL; - data.length = params_len + sizeof(struct nci_core_conn_create_cmd); cmd = kzalloc(data.length, GFP_KERNEL); if (!cmd) @@ -620,17 +702,23 @@ int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type, cmd->destination_type = destination_type; cmd->number_destination_params = number_destination_params; - memcpy(cmd->params, params, params_len); data.cmd = cmd; - if (params->length > 0) - ndev->cur_id = params->value[DEST_SPEC_PARAMS_ID_INDEX]; - else - ndev->cur_id = 0; + if (params) { + memcpy(cmd->params, params, params_len); + if (params->length > 0) + memcpy(&ndev->cur_params, + ¶ms->value[DEST_SPEC_PARAMS_ID_INDEX], + sizeof(struct dest_spec_params)); + else + ndev->cur_params.id = 0; + } else { + ndev->cur_params.id = 0; + } + ndev->cur_dest_type = destination_type; - r = __nci_request(ndev, nci_core_conn_create_req, - (unsigned long)&data, + r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data, msecs_to_jiffies(NCI_CMD_TIMEOUT)); kfree(cmd); return r; @@ -646,6 +734,7 @@ static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt) int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id) { + ndev->cur_conn_id = conn_id; return __nci_request(ndev, nci_core_conn_close_req, conn_id, msecs_to_jiffies(NCI_CMD_TIMEOUT)); } diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c index 2ada2b39e..1e8c1a12a 100644 --- a/net/nfc/nci/ntf.c +++ b/net/nfc/nci/ntf.c @@ -734,7 +734,7 @@ static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev, * “HCI Access”, even if the HCI Network contains multiple NFCEEs. */ ndev->hci_dev->nfcee_id = nfcee_ntf->nfcee_id; - ndev->cur_id = nfcee_ntf->nfcee_id; + ndev->cur_params.id = nfcee_ntf->nfcee_id; nci_req_complete(ndev, status); } diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c index 9b6eb913d..e3bbf1937 100644 --- a/net/nfc/nci/rsp.c +++ b/net/nfc/nci/rsp.c @@ -226,7 +226,7 @@ static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { __u8 status = skb->data[0]; - struct nci_conn_info *conn_info; + struct nci_conn_info *conn_info = NULL; struct nci_core_conn_create_rsp *rsp; pr_debug("status 0x%x\n", status); @@ -241,7 +241,17 @@ static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev, goto exit; } - conn_info->id = ndev->cur_id; + conn_info->dest_params = devm_kzalloc(&ndev->nfc_dev->dev, + sizeof(struct dest_spec_params), + GFP_KERNEL); + if (!conn_info->dest_params) { + status = NCI_STATUS_REJECTED; + goto free_conn_info; + } + + conn_info->dest_type = ndev->cur_dest_type; + conn_info->dest_params->id = ndev->cur_params.id; + conn_info->dest_params->protocol = ndev->cur_params.protocol; conn_info->conn_id = rsp->conn_id; /* Note: data_exchange_cb and data_exchange_cb_context need to @@ -251,7 +261,7 @@ static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev, INIT_LIST_HEAD(&conn_info->list); list_add(&conn_info->list, &ndev->conn_info_list); - if (ndev->cur_id == ndev->hci_dev->nfcee_id) + if (ndev->cur_params.id == ndev->hci_dev->nfcee_id) ndev->hci_dev->conn_info = conn_info; conn_info->conn_id = rsp->conn_id; @@ -259,7 +269,11 @@ static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev, atomic_set(&conn_info->credits_cnt, rsp->credits_cnt); } +free_conn_info: + if (status == NCI_STATUS_REJECTED) + devm_kfree(&ndev->nfc_dev->dev, conn_info); exit: + nci_req_complete(ndev, status); } @@ -271,7 +285,8 @@ static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev, pr_debug("status 0x%x\n", status); if (status == NCI_STATUS_OK) { - conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_id); + conn_info = nci_get_conn_info_by_conn_id(ndev, + ndev->cur_conn_id); if (conn_info) { list_del(&conn_info->list); devm_kfree(&ndev->nfc_dev->dev, conn_info); -- cgit v1.2.3-54-g00ecf