[PATCH net-next 3/3] selftests: Add the NCI testcase reading T4T Tag

From: bongsu . jeon2
Date: Mon Aug 16 2021 - 00:06:42 EST

From: Bongsu Jeon <bongsu.jeon@xxxxxxxxxxx>

Add the NCI testcase reading T4T Tag that has NFC TEST plain text.
the virtual device application acts as T4T Tag in this testcase.

Signed-off-by: Bongsu Jeon <bongsu.jeon@xxxxxxxxxxx>
---
tools/testing/selftests/nci/nci_dev.c | 384 +++++++++++++++++++++++---
1 file changed, 345 insertions(+), 39 deletions(-)

diff --git a/tools/testing/selftests/nci/nci_dev.c b/tools/testing/selftests/nci/nci_dev.c
index 34e76c7fa1fe..65d887dc5ccc 100644
--- a/tools/testing/selftests/nci/nci_dev.c
+++ b/tools/testing/selftests/nci/nci_dev.c
@@ -57,6 +57,29 @@ const __u8 nci_init_rsp_v2[] = {0x40, 0x01, 0x1c, 0x00, 0x1a, 0x7e, 0x06,
const __u8 nci_rf_disc_map_rsp[] = {0x41, 0x00, 0x01, 0x00};
const __u8 nci_rf_disc_rsp[] = {0x41, 0x03, 0x01, 0x00};
const __u8 nci_rf_deact_rsp[] = {0x41, 0x06, 0x01, 0x00};
+const __u8 nci_rf_deact_ntf[] = {0x61, 0x06, 0x02, 0x00, 0x00};
+const __u8 nci_rf_activate_ntf[] = {0x61, 0x05, 0x1D, 0x01, 0x02, 0x04, 0x00,
+ 0xFF, 0xFF, 0x0C, 0x44, 0x03, 0x07, 0x04,
+ 0x62, 0x26, 0x11, 0x80, 0x1D, 0x80, 0x01,
+ 0x20, 0x00, 0x00, 0x00, 0x06, 0x05, 0x75,
+ 0x77, 0x81, 0x02, 0x80};
+const __u8 nci_t4t_select_cmd[] = {0x00, 0x00, 0x0C, 0x00, 0xA4, 0x04, 0x00,
+ 0x07, 0xD2, 0x76, 0x00, 0x00, 0x85, 0x01, 0x01};
+const __u8 nci_t4t_select_cmd2[] = {0x00, 0x00, 0x07, 0x00, 0xA4, 0x00, 0x0C, 0x02,
+ 0xE1, 0x03};
+const __u8 nci_t4t_select_cmd3[] = {0x00, 0x00, 0x07, 0x00, 0xA4, 0x00, 0x0C, 0x02,
+ 0xE1, 0x04};
+const __u8 nci_t4t_read_cmd[] = {0x00, 0x00, 0x05, 0x00, 0xB0, 0x00, 0x00, 0x0F};
+const __u8 nci_t4t_read_rsp[] = {0x00, 0x00, 0x11, 0x00, 0x0F, 0x20, 0x00, 0x3B,
+ 0x00, 0x34, 0x04, 0x06, 0xE1, 0x04, 0x08, 0x00,
+ 0x00, 0x00, 0x90, 0x00};
+const __u8 nci_t4t_read_cmd2[] = {0x00, 0x00, 0x05, 0x00, 0xB0, 0x00, 0x00, 0x02};
+const __u8 nci_t4t_read_rsp2[] = {0x00, 0x00, 0x04, 0x00, 0x0F, 0x90, 0x00};
+const __u8 nci_t4t_read_cmd3[] = {0x00, 0x00, 0x05, 0x00, 0xB0, 0x00, 0x02, 0x0F};
+const __u8 nci_t4t_read_rsp3[] = {0x00, 0x00, 0x11, 0xD1, 0x01, 0x0B, 0x54, 0x02,
+ 0x65, 0x6E, 0x4E, 0x46, 0x43, 0x20, 0x54, 0x45,
+ 0x53, 0x54, 0x90, 0x00};
+const __u8 nci_t4t_rsp_ok[] = {0x00, 0x00, 0x02, 0x90, 0x00};

struct msgtemplate {
struct nlmsghdr n;
@@ -87,7 +110,7 @@ static int create_nl_socket(void)

static int send_cmd_mt_nla(int sd, __u16 nlmsg_type, __u32 nlmsg_pid,
__u8 genl_cmd, int nla_num, __u16 nla_type[],
- void *nla_data[], int nla_len[])
+ void *nla_data[], int nla_len[], __u16 flags)
{
struct sockaddr_nl nladdr;
struct msgtemplate msg;
@@ -98,7 +121,7 @@ static int send_cmd_mt_nla(int sd, __u16 nlmsg_type, __u32 nlmsg_pid,

msg.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
msg.n.nlmsg_type = nlmsg_type;
- msg.n.nlmsg_flags = NLM_F_REQUEST;
+ msg.n.nlmsg_flags = flags;
msg.n.nlmsg_seq = 0;
msg.n.nlmsg_pid = nlmsg_pid;
msg.g.cmd = genl_cmd;
@@ -108,12 +131,12 @@ static int send_cmd_mt_nla(int sd, __u16 nlmsg_type, __u32 nlmsg_pid,
for (cnt = 0; cnt < nla_num; cnt++) {
na = (struct nlattr *)(GENLMSG_DATA(&msg) + prv_len);
na->nla_type = nla_type[cnt];
- na->nla_len = nla_len[cnt] + NLA_HDRLEN;
+ na->nla_len = NLMSG_ALIGN(nla_len[cnt] + NLA_HDRLEN);

if (nla_len > 0)
memcpy(NLA_DATA(na), nla_data[cnt], nla_len[cnt]);

- msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len);
+ msg.n.nlmsg_len += na->nla_len;
prv_len = na->nla_len;
}

@@ -146,11 +169,11 @@ static int send_get_nfc_family(int sd, __u32 pid)
nla_get_family_data = family_name;

return send_cmd_mt_nla(sd, GENL_ID_CTRL, pid, CTRL_CMD_GETFAMILY,
- 1, &nla_get_family_type,
- &nla_get_family_data, &nla_get_family_len);
+ 1, &nla_get_family_type, &nla_get_family_data,
+ &nla_get_family_len, NLM_F_REQUEST);
}

-static int get_family_id(int sd, __u32 pid)
+static int get_family_id(int sd, __u32 pid, __u32 *event_group)
{
struct {
struct nlmsghdr n;
@@ -158,8 +181,9 @@ static int get_family_id(int sd, __u32 pid)
char buf[512];
} ans;
struct nlattr *na;
- int rep_len;
+ int resp_len;
__u16 id;
+ int len;
int rc;

rc = send_get_nfc_family(sd, pid);
@@ -167,17 +191,49 @@ static int get_family_id(int sd, __u32 pid)
if (rc < 0)
return 0;

- rep_len = recv(sd, &ans, sizeof(ans), 0);
+ resp_len = recv(sd, &ans, sizeof(ans), 0);

- if (ans.n.nlmsg_type == NLMSG_ERROR || rep_len < 0 ||
- !NLMSG_OK(&ans.n, rep_len))
+ if (ans.n.nlmsg_type == NLMSG_ERROR || resp_len < 0 ||
+ !NLMSG_OK(&ans.n, resp_len))
return 0;

+ len = 0;
+ resp_len = GENLMSG_PAYLOAD(&ans.n);
na = (struct nlattr *)GENLMSG_DATA(&ans);
- na = (struct nlattr *)((char *)na + NLA_ALIGN(na->nla_len));
- if (na->nla_type == CTRL_ATTR_FAMILY_ID)
- id = *(__u16 *)NLA_DATA(na);

+ while (len < resp_len) {
+ len += NLA_ALIGN(na->nla_len);
+ if (na->nla_type == CTRL_ATTR_FAMILY_ID) {
+ id = *(__u16 *)NLA_DATA(na);
+ } else if (na->nla_type == CTRL_ATTR_MCAST_GROUPS) {
+ struct nlattr *nested_na;
+ struct nlattr *group_na;
+ int group_attr_len;
+ int group_attr;
+
+ nested_na = (struct nlattr *)((char *)na + NLA_HDRLEN);
+ group_na = (struct nlattr *)((char *)nested_na + NLA_HDRLEN);
+ group_attr_len = 0;
+
+ for (group_attr = CTRL_ATTR_MCAST_GRP_UNSPEC;
+ group_attr < CTRL_ATTR_MCAST_GRP_MAX; group_attr++) {
+ if (group_na->nla_type == CTRL_ATTR_MCAST_GRP_ID) {
+ *event_group = *(__u32 *)((char *)group_na +
+ NLA_HDRLEN);
+ break;
+ }
+
+ group_attr_len += NLA_ALIGN(group_na->nla_len) +
+ NLA_HDRLEN;
+ if (group_attr_len >= nested_na->nla_len)
+ break;
+
+ group_na = (struct nlattr *)((char *)group_na +
+ NLA_ALIGN(group_na->nla_len));
+ }
+ }
+ na = (struct nlattr *)(GENLMSG_DATA(&ans) + len);
+ }
return id;
}

@@ -189,12 +245,13 @@ static int send_cmd_with_idx(int sd, __u16 nlmsg_type, __u32 nlmsg_pid,
int nla_len = 4;

return send_cmd_mt_nla(sd, nlmsg_type, nlmsg_pid, genl_cmd, 1,
- &nla_type, &nla_data, &nla_len);
+ &nla_type, &nla_data, &nla_len, NLM_F_REQUEST);
}

-static int get_nci_devid(int sd, __u16 fid, __u32 pid, int dev_id, struct msgtemplate *msg)
+static int get_nci_devid(int sd, __u16 fid, __u32 pid, int dev_id,
+ struct msgtemplate *msg)
{
- int rc, rep_len;
+ int rc, resp_len;

rc = send_cmd_with_idx(sd, fid, pid, NFC_CMD_GET_DEVICE, dev_id);
if (rc < 0) {
@@ -202,14 +259,14 @@ static int get_nci_devid(int sd, __u16 fid, __u32 pid, int dev_id, struct msgtem
goto error;
}

- rep_len = recv(sd, msg, sizeof(*msg), 0);
- if (rep_len < 0) {
+ resp_len = recv(sd, msg, sizeof(*msg), 0);
+ if (resp_len < 0) {
rc = -2;
goto error;
}

if (msg->n.nlmsg_type == NLMSG_ERROR ||
- !NLMSG_OK(&msg->n, rep_len)) {
+ !NLMSG_OK(&msg->n, resp_len)) {
rc = -3;
goto error;
}
@@ -222,21 +279,21 @@ static int get_nci_devid(int sd, __u16 fid, __u32 pid, int dev_id, struct msgtem
static __u8 get_dev_enable_state(struct msgtemplate *msg)
{
struct nlattr *na;
- int rep_len;
+ int resp_len;
int len;

- rep_len = GENLMSG_PAYLOAD(&msg->n);
+ resp_len = GENLMSG_PAYLOAD(&msg->n);
na = (struct nlattr *)GENLMSG_DATA(msg);
len = 0;

- while (len < rep_len) {
+ while (len < resp_len) {
len += NLA_ALIGN(na->nla_len);
if (na->nla_type == NFC_ATTR_DEVICE_POWERED)
return *(char *)NLA_DATA(na);
na = (struct nlattr *)(GENLMSG_DATA(msg) + len);
}

- return rep_len;
+ return resp_len;
}

FIXTURE(NCI) {
@@ -347,6 +404,7 @@ FIXTURE_SETUP(NCI)
{
struct msgtemplate msg;
pthread_t thread_t;
+ __u32 event_group;
int status;
int rc;

@@ -358,12 +416,16 @@ FIXTURE_SETUP(NCI)
ASSERT_NE(self->sd, -1);

self->pid = getpid();
- self->fid = get_family_id(self->sd, self->pid);
+ self->fid = get_family_id(self->sd, self->pid, &event_group);
ASSERT_NE(self->fid, -1);

self->virtual_nci_fd = open("/dev/virtual_nci", O_RDWR);
ASSERT_GT(self->virtual_nci_fd, -1);

+ rc = setsockopt(self->sd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &event_group,
+ sizeof(event_group));
+ ASSERT_NE(rc, -1);
+
rc = ioctl(self->virtual_nci_fd, IOCTL_GET_NCIDEV_IDX, &self->dev_idex);
ASSERT_EQ(rc, 0);

@@ -517,38 +579,282 @@ static void *virtual_poll_stop(void *data)
return (void *)-1;
}

-TEST_F(NCI, start_poll)
+int start_polling(int dev_idx, int proto, int virtual_fd, int sd, int fid, int pid)
{
__u16 nla_start_poll_type[2] = {NFC_ATTR_DEVICE_INDEX,
NFC_ATTR_PROTOCOLS};
- void *nla_start_poll_data[2] = {&self->dev_idex, &self->proto};
+ void *nla_start_poll_data[2] = {&dev_idx, &proto};
int nla_start_poll_len[2] = {4, 4};
pthread_t thread_t;
int status;
int rc;

rc = pthread_create(&thread_t, NULL, virtual_poll_start,
- (void *)&self->virtual_nci_fd);
- ASSERT_GT(rc, -1);
+ (void *)&virtual_fd);
+ if (rc < 0)
+ return rc;

- rc = send_cmd_mt_nla(self->sd, self->fid, self->pid,
- NFC_CMD_START_POLL, 2, nla_start_poll_type,
- nla_start_poll_data, nla_start_poll_len);
- EXPECT_EQ(rc, 0);
+ rc = send_cmd_mt_nla(sd, fid, pid, NFC_CMD_START_POLL, 2, nla_start_poll_type,
+ nla_start_poll_data, nla_start_poll_len, NLM_F_REQUEST);
+ if (rc != 0)
+ return rc;

pthread_join(thread_t, (void **)&status);
- ASSERT_EQ(status, 0);
+ return status;
+}
+
+int stop_polling(int dev_idx, int virtual_fd, int sd, int fid, int pid)
+{
+ pthread_t thread_t;
+ int status;
+ int rc;

rc = pthread_create(&thread_t, NULL, virtual_poll_stop,
- (void *)&self->virtual_nci_fd);
- ASSERT_GT(rc, -1);
+ (void *)&virtual_fd);
+ if (rc < 0)
+ return rc;

- rc = send_cmd_with_idx(self->sd, self->fid, self->pid,
- NFC_CMD_STOP_POLL, self->dev_idex);
- EXPECT_EQ(rc, 0);
+ rc = send_cmd_with_idx(sd, fid, pid,
+ NFC_CMD_STOP_POLL, dev_idx);
+ if (rc != 0)
+ return rc;

pthread_join(thread_t, (void **)&status);
+ return status;
+}
+
+TEST_F(NCI, start_poll)
+{
+ int status;
+
+ status = start_polling(self->dev_idex, self->proto, self->virtual_nci_fd,
+ self->sd, self->fid, self->pid);
+ EXPECT_EQ(status, 0);
+
+ status = stop_polling(self->dev_idex, self->virtual_nci_fd, self->sd,
+ self->fid, self->pid);
+ EXPECT_EQ(status, 0);
+}
+
+int get_taginfo(int dev_idx, int sd, int fid, int pid)
+{
+ struct {
+ struct nlmsghdr n;
+ struct genlmsghdr g;
+ char buf[512];
+ } ans;
+
+ struct nlattr *na;
+ __u32 protocol;
+ int targetidx;
+ __u8 sel_res;
+ int resp_len;
+ int len;
+
+ __u16 tagid_type;
+ void *tagid_type_data;
+ int tagid_len;
+
+ tagid_type = NFC_ATTR_DEVICE_INDEX;
+ tagid_type_data = &dev_idx;
+ tagid_len = 4;
+
+ send_cmd_mt_nla(sd, fid, pid, NFC_CMD_GET_TARGET, 1, &tagid_type,
+ &tagid_type_data, &tagid_len, NLM_F_REQUEST | NLM_F_DUMP);
+ resp_len = recv(sd, &ans, sizeof(ans), 0);
+ if (ans.n.nlmsg_type == NLMSG_ERROR || resp_len < 0 ||
+ !NLMSG_OK(&ans.n, resp_len))
+ return -1;
+
+ resp_len = GENLMSG_PAYLOAD(&ans.n);
+ na = (struct nlattr *)GENLMSG_DATA(&ans);
+
+ len = 0;
+ targetidx = -1;
+ protocol = -1;
+ sel_res = -1;
+
+ while (len < resp_len) {
+ len += NLA_ALIGN(na->nla_len);
+
+ if (na->nla_type == NFC_ATTR_TARGET_INDEX)
+ targetidx = *(int *)((char *)na + NLA_HDRLEN);
+ else if (na->nla_type == NFC_ATTR_TARGET_SEL_RES)
+ sel_res = *(__u8 *)((char *)na + NLA_HDRLEN);
+ else if (na->nla_type == NFC_ATTR_PROTOCOLS)
+ protocol = *(__u32 *)((char *)na + NLA_HDRLEN);
+
+ na = (struct nlattr *)(GENLMSG_DATA(&ans) + len);
+ }
+
+ if (targetidx == -1 || sel_res != 0x20 || protocol != NFC_PROTO_ISO14443_MASK)
+ return -1;
+
+ return targetidx;
+}
+
+int connect_socket(int dev_idx, int target_idx)
+{
+ struct sockaddr_nfc addr;
+ int sock;
+ int err = 0;
+
+ sock = socket(AF_NFC, SOCK_SEQPACKET, NFC_SOCKPROTO_RAW);
+ if (sock == -1)
+ return -1;
+
+ addr.sa_family = AF_NFC;
+ addr.dev_idx = dev_idx;
+ addr.target_idx = target_idx;
+ addr.nfc_protocol = NFC_PROTO_ISO14443;
+
+ err = connect(sock, (struct sockaddr *)&addr, sizeof(addr));
+ if (err) {
+ close(sock);
+ return -1;
+ }
+
+ return sock;
+}
+
+int connect_tag(int dev_idx, int virtual_fd, int sd, int fid, int pid)
+{
+ struct genlmsghdr *genlhdr;
+ struct nlattr *na;
+ char evt_data[255];
+ int target_idx;
+ int resp_len;
+ int evt_dev;
+
+ write(virtual_fd, nci_rf_activate_ntf, sizeof(nci_rf_activate_ntf));
+ resp_len = recv(sd, evt_data, sizeof(evt_data), 0);
+ if (resp_len < 0)
+ return -1;
+
+ genlhdr = (struct genlmsghdr *)((struct nlmsghdr *)evt_data + 1);
+ na = (struct nlattr *)(genlhdr + 1);
+ evt_dev = *(int *)((char *)na + NLA_HDRLEN);
+ if (dev_idx != evt_dev)
+ return -1;
+
+ target_idx = get_taginfo(dev_idx, sd, fid, pid);
+ if (target_idx == -1)
+ return -1;
+ return connect_socket(dev_idx, target_idx);
+}
+
+int read_write_nci_cmd(int nfc_sock, int virtual_fd, const __u8 *cmd, __u32 cmd_len,
+ const __u8 *rsp, __u32 rsp_len)
+{
+ char buf[256];
+ unsigned int len;
+
+ send(nfc_sock, &cmd[3], cmd_len - 3, 0);
+ len = read(virtual_fd, buf, cmd_len);
+ if (len < 0 || memcmp(buf, cmd, cmd_len))
+ return -1;
+
+ write(virtual_fd, rsp, rsp_len);
+ len = recv(nfc_sock, buf, rsp_len - 2, 0);
+ if (len < 0 || memcmp(&buf[1], &rsp[3], rsp_len - 3))
+ return -1;
+
+ return 0;
+}
+
+int read_tag(int nfc_sock, int virtual_fd)
+{
+ if (read_write_nci_cmd(nfc_sock, virtual_fd, nci_t4t_select_cmd,
+ sizeof(nci_t4t_select_cmd), nci_t4t_rsp_ok,
+ sizeof(nci_t4t_rsp_ok)))
+ return -1;
+
+ if (read_write_nci_cmd(nfc_sock, virtual_fd, nci_t4t_select_cmd2,
+ sizeof(nci_t4t_select_cmd2), nci_t4t_rsp_ok,
+ sizeof(nci_t4t_rsp_ok)))
+ return -1;
+
+ if (read_write_nci_cmd(nfc_sock, virtual_fd, nci_t4t_read_cmd,
+ sizeof(nci_t4t_read_cmd), nci_t4t_read_rsp,
+ sizeof(nci_t4t_read_rsp)))
+ return -1;
+
+ if (read_write_nci_cmd(nfc_sock, virtual_fd, nci_t4t_select_cmd3,
+ sizeof(nci_t4t_select_cmd3), nci_t4t_rsp_ok,
+ sizeof(nci_t4t_rsp_ok)))
+ return -1;
+
+ if (read_write_nci_cmd(nfc_sock, virtual_fd, nci_t4t_read_cmd2,
+ sizeof(nci_t4t_read_cmd2), nci_t4t_read_rsp2,
+ sizeof(nci_t4t_read_rsp2)))
+ return -1;
+
+ return read_write_nci_cmd(nfc_sock, virtual_fd, nci_t4t_read_cmd3,
+ sizeof(nci_t4t_read_cmd3), nci_t4t_read_rsp3,
+ sizeof(nci_t4t_read_rsp3));
+}
+
+static void *virtual_deactivate_proc(void *data)
+{
+ int virtual_fd;
+ char buf[256];
+ int deactcmd_len;
+ int len;
+
+ virtual_fd = *(int *)data;
+ deactcmd_len = sizeof(nci_rf_deact_cmd);
+ len = read(virtual_fd, buf, deactcmd_len);
+ if (len != deactcmd_len || memcmp(buf, nci_rf_deact_cmd, deactcmd_len))
+ return (void *)-1;
+
+ write(virtual_fd, nci_rf_deact_rsp, sizeof(nci_rf_deact_rsp));
+ write(virtual_fd, nci_rf_deact_ntf, sizeof(nci_rf_deact_ntf));
+
+ return (void *)0;
+}
+
+int disconnect_tag(int nfc_sock, int virtual_fd)
+{
+ pthread_t thread_t;
+ char buf[256];
+ int status;
+ int len;
+
+ send(nfc_sock, &nci_t4t_select_cmd3[3], sizeof(nci_t4t_select_cmd3) - 3, 0);
+ len = read(virtual_fd, buf, sizeof(nci_t4t_select_cmd3));
+ if (len < 0 || memcmp(buf, nci_t4t_select_cmd3, sizeof(nci_t4t_select_cmd3)))
+ return -1;
+
+ len = recv(nfc_sock, buf, sizeof(nci_t4t_rsp_ok), 0);
+ if (len != -1)
+ return -1;
+
+ status = pthread_create(&thread_t, NULL, virtual_deactivate_proc,
+ (void *)&virtual_fd);
+
+ close(nfc_sock);
+ pthread_join(thread_t, (void **)&status);
+ return status;
+}
+
+TEST_F(NCI, t4t_tag_read)
+{
+ int nfc_sock;
+ int status;
+
+ status = start_polling(self->dev_idex, self->proto, self->virtual_nci_fd,
+ self->sd, self->fid, self->pid);
+ EXPECT_EQ(status, 0);
+
+ nfc_sock = connect_tag(self->dev_idex, self->virtual_nci_fd, self->sd,
+ self->fid, self->pid);
+ ASSERT_GT(nfc_sock, -1);
+
+ status = read_tag(nfc_sock, self->virtual_nci_fd);
ASSERT_EQ(status, 0);
+
+ status = disconnect_tag(nfc_sock, self->virtual_nci_fd);
+ EXPECT_EQ(status, 0);
}

TEST_F(NCI, deinit)
--
2.32.0