/* * NFC Digital Protocol stack * Copyright (c) 2013, Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * */ #define pr_fmt(fmt) "digital: %s: " fmt, __func__ #include "digital.h" #define DIGITAL_NFC_DEP_N_RETRY_NACK 2 #define DIGITAL_NFC_DEP_N_RETRY_ATN 2 #define DIGITAL_NFC_DEP_FRAME_DIR_OUT 0xD4 #define DIGITAL_NFC_DEP_FRAME_DIR_IN 0xD5 #define DIGITAL_NFC_DEP_NFCA_SOD_SB 0xF0 #define DIGITAL_CMD_ATR_REQ 0x00 #define DIGITAL_CMD_ATR_RES 0x01 #define DIGITAL_CMD_PSL_REQ 0x04 #define DIGITAL_CMD_PSL_RES 0x05 #define DIGITAL_CMD_DEP_REQ 0x06 #define DIGITAL_CMD_DEP_RES 0x07 #define DIGITAL_ATR_REQ_MIN_SIZE 16 #define DIGITAL_ATR_REQ_MAX_SIZE 64 #define DIGITAL_DID_MAX 14 #define DIGITAL_PAYLOAD_SIZE_MAX 254 #define DIGITAL_PAYLOAD_BITS_TO_PP(s) (((s) & 0x3) << 4) #define DIGITAL_PAYLOAD_PP_TO_BITS(s) (((s) >> 4) & 0x3) #define DIGITAL_PAYLOAD_BITS_TO_FSL(s) ((s) & 0x3) #define DIGITAL_PAYLOAD_FSL_TO_BITS(s) ((s) & 0x3) #define DIGITAL_GB_BIT 0x02 #define DIGITAL_NFC_DEP_REQ_RES_HEADROOM 2 /* SoD: [SB (NFC-A)] + LEN */ #define DIGITAL_NFC_DEP_REQ_RES_TAILROOM 2 /* EoD: 2-byte CRC */ #define DIGITAL_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) #define DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT 0x10 #define DIGITAL_NFC_DEP_PFB_MI_BIT 0x10 #define DIGITAL_NFC_DEP_PFB_NACK_BIT 0x10 #define DIGITAL_NFC_DEP_PFB_DID_BIT 0x04 #define DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ ((pfb) & DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT) #define DIGITAL_NFC_DEP_MI_BIT_SET(pfb) ((pfb) & DIGITAL_NFC_DEP_PFB_MI_BIT) #define DIGITAL_NFC_DEP_NACK_BIT_SET(pfb) ((pfb) & DIGITAL_NFC_DEP_PFB_NACK_BIT) #define DIGITAL_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) #define DIGITAL_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & DIGITAL_NFC_DEP_PFB_DID_BIT) #define DIGITAL_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) #define DIGITAL_NFC_DEP_PFB_I_PDU 0x00 #define DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU 0x40 #define DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 struct digital_atr_req { u8 dir; u8 cmd; u8 nfcid3[10]; u8 did; u8 bs; u8 br; u8 pp; u8 gb[0]; } __packed; struct digital_atr_res { u8 dir; u8 cmd; u8 nfcid3[10]; u8 did; u8 bs; u8 br; u8 to; u8 pp; u8 gb[0]; } __packed; struct digital_psl_req { u8 dir; u8 cmd; u8 did; u8 brs; u8 fsl; } __packed; struct digital_psl_res { u8 dir; u8 cmd; u8 did; } __packed; struct digital_dep_req_res { u8 dir; u8 cmd; u8 pfb; } __packed; static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp); static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp); static const u8 digital_payload_bits_map[4] = { [0] = 64, [1] = 128, [2] = 192, [3] = 254 }; static u8 digital_payload_bits_to_size(u8 payload_bits) { if (payload_bits >= ARRAY_SIZE(digital_payload_bits_map)) return 0; return digital_payload_bits_map[payload_bits]; } static u8 digital_payload_size_to_bits(u8 payload_size) { int i; for (i = 0; i < ARRAY_SIZE(digital_payload_bits_map); i++) if (digital_payload_bits_map[i] == payload_size) return i; return 0xff; } static void digital_skb_push_dep_sod(struct nfc_digital_dev *ddev, struct sk_buff *skb) { skb_push(skb, sizeof(u8)); skb->data[0] = skb->len; if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A) *skb_push(skb, sizeof(u8)) = DIGITAL_NFC_DEP_NFCA_SOD_SB; } static int digital_skb_pull_dep_sod(struct nfc_digital_dev *ddev, struct sk_buff *skb) { u8 size; if (skb->len < 2) return -EIO; if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A) skb_pull(skb, sizeof(u8)); size = skb->data[0]; if (size != skb->len) return -EIO; skb_pull(skb, sizeof(u8)); return 0; } static struct sk_buff * digital_send_dep_data_prep(struct nfc_digital_dev *ddev, struct sk_buff *skb, struct digital_dep_req_res *dep_req_res, struct digital_data_exch *data_exch) { struct sk_buff *new_skb; if (skb->len > ddev->remote_payload_max) { dep_req_res->pfb |= DIGITAL_NFC_DEP_PFB_MI_BIT; new_skb = digital_skb_alloc(ddev, ddev->remote_payload_max); if (!new_skb) { kfree_skb(ddev->chaining_skb); ddev->chaining_skb = NULL; return ERR_PTR(-ENOMEM); } skb_reserve(new_skb, ddev->tx_headroom + NFC_HEADER_SIZE + DIGITAL_NFC_DEP_REQ_RES_HEADROOM); memcpy(skb_put(new_skb, ddev->remote_payload_max), skb->data, ddev->remote_payload_max); skb_pull(skb, ddev->remote_payload_max); ddev->chaining_skb = skb; ddev->data_exch = data_exch; } else { ddev->chaining_skb = NULL; new_skb = skb; } return new_skb; } static struct sk_buff * digital_recv_dep_data_gather(struct nfc_digital_dev *ddev, u8 pfb, struct sk_buff *resp, int (*send_ack)(struct nfc_digital_dev *ddev, struct digital_data_exch *data_exch), struct digital_data_exch *data_exch) { struct sk_buff *new_skb; int rc; if (DIGITAL_NFC_DEP_MI_BIT_SET(pfb) && (!ddev->chaining_skb)) { ddev->chaining_skb = nfc_alloc_recv_skb(8 * ddev->local_payload_max, GFP_KERNEL); if (!ddev->chaining_skb) { rc = -ENOMEM; goto error; } } if (ddev->chaining_skb) { if (resp->len > skb_tailroom(ddev->chaining_skb)) { new_skb = skb_copy_expand(ddev->chaining_skb, skb_headroom( ddev->chaining_skb), 8 * ddev->local_payload_max, GFP_KERNEL); if (!new_skb) { rc = -ENOMEM; goto error; } kfree_skb(ddev->chaining_skb); ddev->chaining_skb = new_skb; } memcpy(skb_put(ddev->chaining_skb, resp->len), resp->data, resp->len); kfree_skb(resp); resp = NULL; if (DIGITAL_NFC_DEP_MI_BIT_SET(pfb)) { rc = send_ack(ddev, data_exch); if (rc) goto error; return NULL; } resp = ddev->chaining_skb; ddev->chaining_skb = NULL; } return resp; error: kfree_skb(resp); kfree_skb(ddev->chaining_skb); ddev->chaining_skb = NULL; return ERR_PTR(rc); } static void digital_in_recv_psl_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct nfc_target *target = arg; struct digital_psl_res *psl_res; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } rc = ddev->skb_check_crc(resp); if (rc) { PROTOCOL_ERR("14.4.1.6"); goto exit; } rc = digital_skb_pull_dep_sod(ddev, resp); if (rc) { PROTOCOL_ERR("14.4.1.2"); goto exit; } psl_res = (struct digital_psl_res *)resp->data; if ((res
# Copyright (c) 2016-2017 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#;

nodes:
-
    name: "trafficgen_1"
    role: TrafficGen
    ip: 1.1.1.1
    user: "root"
    ssh_port: "22"
    password: "r00t"
    key_filename: ""
    interfaces:
        xe0:
            vpci: "0000:05:00.0"
            local_mac: "68:05:ca:30:3d:50"
            driver: "i40e"
            local_ip: "152.16.100.19"
            netmask: "255.255.255.0"
            dpdk_port_num: 0
        xe1:
            vpci: "0000:05:00.1"
            local_mac: "68:05:ca:30:3d:51"
            driver: "i40e"
            local_ip: "152.16.40.19"
            netmask: "255.255.255.0"
            dpdk_port_num: 1
-
    name: "vnf"
    role: VNF
    ip: 1.1.1.2
    user: "root"
    ssh_port: "22"
    password: "r00t"
    key_filename: ""
    interfaces:
        xe0:
            vpci: "0000:05:00.0"
            local_mac: "68:05:ca:30:3c:68"
            driver: "i40e"
            local_ip: "152.16.100.21"
            netmask: "255.255.255.0"
            dpdk_port_num: 0
        xe1:
            vpci: "0000:05:00.1"
            local_mac: "68:05:ca:30:3c:69"
            driver: "i40e"
            local_ip: "152.16.40.21"
            netmask: "255.255.255.0"
            dpdk_port_num: 1
    routing_table:
    - network: "152.16.100.20"
      netmask: "255.255.255.0"
      gateway: "152.16.100.20"
      if: "xe0"
    - network: "152.16.40.20"
      netmask: "255.255.255.0"
      gateway: "152.16.40.20"
      if: "xe1"
    nd_route_tbl:
    - network: "0064:ff9b:0:0:0:0:9810:6414"
      netmask: "112"
      gateway: "0064:ff9b:0:0:0:0:9810:6414"
      if: "xe0"
    - network: "0064:ff9b:0:0:0:0:9810:2814"
      netmask: "112"
      gateway: "0064:ff9b:0:0:0:0:9810:2814"
      if: "xe1"
fc_dep_pni) || !ddev->chaining_skb || !ddev->saved_skb) { rc = -EIO; goto exit; } if (ddev->atn_count) { ddev->atn_count = 0; rc = digital_tg_send_saved_skb(ddev); if (rc) goto exit; return; } kfree_skb(ddev->saved_skb); ddev->saved_skb = NULL; rc = digital_tg_send_dep_res(ddev, ddev->chaining_skb); if (rc) goto exit; } else { /* NACK */ if ((DIGITAL_NFC_DEP_PFB_PNI(pfb + 1) != ddev->curr_nfc_dep_pni) || !ddev->saved_skb) { rc = -EIO; goto exit; } ddev->atn_count = 0; rc = digital_tg_send_saved_skb(ddev); if (rc) { kfree_skb(ddev->saved_skb); goto exit; } } return; case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU: if (DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb)) { rc = -EINVAL; goto exit; } rc = digital_tg_send_atn(ddev); if (rc) goto exit; ddev->atn_count++; kfree_skb(resp); return; } rc = nfc_tm_data_received(ddev->nfc_dev, resp); exit: kfree_skb(ddev->chaining_skb); ddev->chaining_skb = NULL; ddev->atn_count = 0; kfree_skb(ddev->saved_skb); ddev->saved_skb = NULL; if (rc) kfree_skb(resp); } int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb) { struct digital_dep_req_res *dep_res; struct sk_buff *chaining_skb, *tmp_skb; int rc; skb_push(skb, sizeof(struct digital_dep_req_res)); dep_res = (struct digital_dep_req_res *)skb->data; dep_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; dep_res->cmd = DIGITAL_CMD_DEP_RES; dep_res->pfb = ddev->curr_nfc_dep_pni; if (ddev->did) { dep_res->pfb |= DIGITAL_NFC_DEP_PFB_DID_BIT; memcpy(skb_put(skb, sizeof(ddev->did)), &ddev->did, sizeof(ddev->did)); } ddev->curr_nfc_dep_pni = DIGITAL_NFC_DEP_PFB_PNI(ddev->curr_nfc_dep_pni + 1); chaining_skb = ddev->chaining_skb; tmp_skb = digital_send_dep_data_prep(ddev, skb, dep_res, NULL); if (IS_ERR(tmp_skb)) return PTR_ERR(tmp_skb); digital_skb_push_dep_sod(ddev, tmp_skb); ddev->skb_add_crc(tmp_skb); ddev->saved_skb = skb_get(tmp_skb); ddev->saved_skb_len = tmp_skb->len; rc = digital_tg_send_cmd(ddev, tmp_skb, 1500, digital_tg_recv_dep_req, NULL); if (rc) { if (tmp_skb != skb) kfree_skb(tmp_skb); kfree_skb(chaining_skb); ddev->chaining_skb = NULL; kfree_skb(ddev->saved_skb); ddev->saved_skb = NULL; } return rc; } static void digital_tg_send_psl_res_complete(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { u8 rf_tech = (unsigned long)arg; if (IS_ERR(resp)) return; digital_tg_set_rf_tech(ddev, rf_tech); digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); digital_tg_listen(ddev, 1500, digital_tg_recv_dep_req, NULL); dev_kfree_skb(resp); } static int digital_tg_send_psl_res(struct nfc_digital_dev *ddev, u8 did, u8 rf_tech) { struct digital_psl_res *psl_res; struct sk_buff *skb; int rc; skb = digital_skb_alloc(ddev, sizeof(struct digital_psl_res)); if (!skb) return -ENOMEM; skb_put(skb, sizeof(struct digital_psl_res)); psl_res = (struct digital_psl_res *)skb->data; psl_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; psl_res->cmd = DIGITAL_CMD_PSL_RES; psl_res->did = did; digital_skb_push_dep_sod(ddev, skb); ddev->skb_add_crc(skb); ddev->curr_nfc_dep_pni = 0; rc = digital_tg_send_cmd(ddev, skb, 0, digital_tg_send_psl_res_complete, (void *)(unsigned long)rf_tech); if (rc) kfree_skb(skb); return rc; } static void digital_tg_recv_psl_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { int rc; struct digital_psl_req *psl_req; u8 rf_tech; u8 dsi, payload_size, payload_bits; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } rc = ddev->skb_check_crc(resp); if (rc) { PROTOCOL_ERR("14.4.1.6"); goto exit; } rc = digital_skb_pull_dep_sod(ddev, resp); if (rc) { PROTOCOL_ERR("14.4.1.2"); goto exit; } psl_req = (struct digital_psl_req *)resp->data; if (resp->len != sizeof(struct digital_psl_req) || psl_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || psl_req->cmd != DIGITAL_CMD_PSL_REQ) { rc = -EIO; goto exit; } dsi = (psl_req->brs >> 3) & 0x07; switch (dsi) { case 0: rf_tech = NFC_DIGITAL_RF_TECH_106A; break; case 1: rf_tech = NFC_DIGITAL_RF_TECH_212F; break; case 2: rf_tech = NFC_DIGITAL_RF_TECH_424F; break; default: pr_err("Unsupported dsi value %d\n", dsi); goto exit; } payload_bits = DIGITAL_PAYLOAD_FSL_TO_BITS(psl_req->fsl); payload_size = digital_payload_bits_to_size(payload_bits); if (!payload_size || (payload_size > min(ddev->local_payload_max, ddev->remote_payload_max))) { rc = -EINVAL; goto exit; } ddev->local_payload_max = payload_size; ddev->remote_payload_max = payload_size; rc = digital_tg_send_psl_res(ddev, psl_req->did, rf_tech); exit: kfree_skb(resp); } static void digital_tg_send_atr_res_complete(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { int offset; if (IS_ERR(resp)) { digital_poll_next_tech(ddev); return; } offset = 2; if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB) offset++; ddev->atn_count = 0; if (resp->data[offset] == DIGITAL_CMD_PSL_REQ) digital_tg_recv_psl_req(ddev, arg, resp); else digital_tg_recv_dep_req(ddev, arg, resp); } static int digital_tg_send_atr_res(struct nfc_digital_dev *ddev, struct digital_atr_req *atr_req) { struct digital_atr_res *atr_res; struct sk_buff *skb; u8 *gb, payload_bits; size_t gb_len; int rc; gb = nfc_get_local_general_bytes(ddev->nfc_dev, &gb_len); if (!gb) gb_len = 0; skb = digital_skb_alloc(ddev, sizeof(struct digital_atr_res) + gb_len); if (!skb) return -ENOMEM; skb_put(skb, sizeof(struct digital_atr_res)); atr_res = (struct digital_atr_res *)skb->data; memset(atr_res, 0, sizeof(struct digital_atr_res)); atr_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; atr_res->cmd = DIGITAL_CMD_ATR_RES; memcpy(atr_res->nfcid3, atr_req->nfcid3, sizeof(atr_req->nfcid3)); atr_res->to = 8; ddev->local_payload_max = DIGITAL_PAYLOAD_SIZE_MAX; payload_bits = digital_payload_size_to_bits(ddev->local_payload_max); atr_res->pp = DIGITAL_PAYLOAD_BITS_TO_PP(payload_bits); if (gb_len) { skb_put(skb, gb_len); atr_res->pp |= DIGITAL_GB_BIT; memcpy(atr_res->gb, gb, gb_len); } digital_skb_push_dep_sod(ddev, skb); ddev->skb_add_crc(skb); ddev->curr_nfc_dep_pni = 0; rc = digital_tg_send_cmd(ddev, skb, 999, digital_tg_send_atr_res_complete, NULL); if (rc) kfree_skb(skb); return rc; } void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { int rc; struct digital_atr_req *atr_req; size_t gb_len, min_size; u8 poll_tech_count, payload_bits; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (!resp->len) { rc = -EIO; goto exit; } if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB) { min_size = DIGITAL_ATR_REQ_MIN_SIZE + 2; digital_tg_set_rf_tech(ddev, NFC_DIGITAL_RF_TECH_106A); } else { min_size = DIGITAL_ATR_REQ_MIN_SIZE + 1; digital_tg_set_rf_tech(ddev, NFC_DIGITAL_RF_TECH_212F); } if (resp->len < min_size) { rc = -EIO; goto exit; } ddev->curr_protocol = NFC_PROTO_NFC_DEP_MASK; rc = ddev->skb_check_crc(resp); if (rc) { PROTOCOL_ERR("14.4.1.6"); goto exit; } rc = digital_skb_pull_dep_sod(ddev, resp); if (rc) { PROTOCOL_ERR("14.4.1.2"); goto exit; } atr_req = (struct digital_atr_req *)resp->data; if (atr_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || atr_req->cmd != DIGITAL_CMD_ATR_REQ || atr_req->did > DIGITAL_DID_MAX) { rc = -EINVAL; goto exit; } payload_bits = DIGITAL_PAYLOAD_PP_TO_BITS(atr_req->pp); ddev->remote_payload_max = digital_payload_bits_to_size(payload_bits); if (!ddev->remote_payload_max) { rc = -EINVAL; goto exit; } ddev->did = atr_req->did; rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED); if (rc) goto exit; rc = digital_tg_send_atr_res(ddev, atr_req); if (rc) goto exit; gb_len = resp->len - sizeof(struct digital_atr_req); poll_tech_count = ddev->poll_tech_count; ddev->poll_tech_count = 0; rc = nfc_tm_activated(ddev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, NFC_COMM_PASSIVE, atr_req->gb, gb_len); if (rc) { ddev->poll_tech_count = poll_tech_count; goto exit; } rc = 0; exit: if (rc) digital_poll_next_tech(ddev); dev_kfree_skb(resp); }