diff options
Diffstat (limited to 'net/nfc/netlink.c')
| -rw-r--r-- | net/nfc/netlink.c | 584 |
1 files changed, 563 insertions, 21 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 3568ae16786..43cb1c17e26 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -16,9 +16,7 @@ * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the - * Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ @@ -28,11 +26,10 @@ #include <linux/slab.h> #include "nfc.h" +#include "llcp.h" -#include "llcp/llcp.h" - -static struct genl_multicast_group nfc_genl_event_mcgrp = { - .name = NFC_GENL_MCAST_EVENT_NAME, +static const struct genl_multicast_group nfc_genl_mcgrps[] = { + { .name = NFC_GENL_MCAST_EVENT_NAME, }, }; static struct genl_family nfc_genl_family = { @@ -53,6 +50,18 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, + [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 }, + [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, + [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, + [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, + [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, + .len = NFC_FIRMWARE_NAME_MAXSIZE }, + [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY }, +}; + +static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { + [NFC_SDP_ATTR_URI] = { .type = NLA_STRING }, + [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 }, }; static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, @@ -85,6 +94,14 @@ static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, target->sensf_res)) goto nla_put_failure; + if (target->is_iso15693) { + if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID, + target->iso15693_dsfid) || + nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID, + sizeof(target->iso15693_uid), target->iso15693_uid)) + goto nla_put_failure; + } + return genlmsg_end(msg, hdr); nla_put_failure: @@ -183,7 +200,7 @@ int nfc_genl_targets_found(struct nfc_dev *dev) genlmsg_end(msg, hdr); - return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); + return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); nla_put_failure: genlmsg_cancel(msg, hdr); @@ -212,7 +229,7 @@ int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) genlmsg_end(msg, hdr); - genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); return 0; @@ -244,7 +261,7 @@ int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) genlmsg_end(msg, hdr); - genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); return 0; @@ -274,7 +291,7 @@ int nfc_genl_tm_deactivated(struct nfc_dev *dev) genlmsg_end(msg, hdr); - genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); return 0; @@ -307,7 +324,7 @@ int nfc_genl_device_added(struct nfc_dev *dev) genlmsg_end(msg, hdr); - genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); return 0; @@ -337,7 +354,138 @@ int nfc_genl_device_removed(struct nfc_dev *dev) genlmsg_end(msg, hdr); - genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + +int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list) +{ + struct sk_buff *msg; + struct nlattr *sdp_attr, *uri_attr; + struct nfc_llcp_sdp_tlv *sdres; + struct hlist_node *n; + void *hdr; + int rc = -EMSGSIZE; + int i; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_LLC_SDRES); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) + goto nla_put_failure; + + sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP); + if (sdp_attr == NULL) { + rc = -ENOMEM; + goto nla_put_failure; + } + + i = 1; + hlist_for_each_entry_safe(sdres, n, sdres_list, node) { + pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap); + + uri_attr = nla_nest_start(msg, i++); + if (uri_attr == NULL) { + rc = -ENOMEM; + goto nla_put_failure; + } + + if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap)) + goto nla_put_failure; + + if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri)) + goto nla_put_failure; + + nla_nest_end(msg, uri_attr); + + hlist_del(&sdres->node); + + nfc_llcp_free_sdp_tlv(sdres); + } + + nla_nest_end(msg, sdp_attr); + + genlmsg_end(msg, hdr); + + return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); + +nla_put_failure: + genlmsg_cancel(msg, hdr); + +free_msg: + nlmsg_free(msg); + + nfc_llcp_free_sdp_tlv_list(sdres_list); + + return rc; +} + +int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_SE_ADDED); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || + nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || + nla_put_u8(msg, NFC_ATTR_SE_TYPE, type)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + +int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_SE_REMOVED); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || + nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); return 0; @@ -458,7 +606,7 @@ int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, dev->dep_link_up = true; - genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); return 0; @@ -490,7 +638,7 @@ int nfc_genl_dep_link_down_event(struct nfc_dev *dev) genlmsg_end(msg, hdr); - genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); return 0; @@ -858,7 +1006,371 @@ exit: return rc; } -static struct genl_ops nfc_genl_ops[] = { +static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + struct nfc_llcp_local *local; + struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; + u32 idx; + u8 tid; + char *uri; + int rc = 0, rem; + size_t uri_len, tlvs_len; + struct hlist_head sdreq_list; + struct nfc_llcp_sdp_tlv *sdreq; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_LLC_SDP]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) { + rc = -ENODEV; + goto exit; + } + + device_lock(&dev->dev); + + if (dev->dep_link_up == false) { + rc = -ENOLINK; + goto exit; + } + + local = nfc_llcp_find_local(dev); + if (!local) { + nfc_put_device(dev); + rc = -ENODEV; + goto exit; + } + + INIT_HLIST_HEAD(&sdreq_list); + + tlvs_len = 0; + + nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { + rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr, + nfc_sdp_genl_policy); + + if (rc != 0) { + rc = -EINVAL; + goto exit; + } + + if (!sdp_attrs[NFC_SDP_ATTR_URI]) + continue; + + uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); + if (uri_len == 0) + continue; + + uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); + if (uri == NULL || *uri == 0) + continue; + + tid = local->sdreq_next_tid++; + + sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); + if (sdreq == NULL) { + rc = -ENOMEM; + goto exit; + } + + tlvs_len += sdreq->tlv_len; + + hlist_add_head(&sdreq->node, &sdreq_list); + } + + if (hlist_empty(&sdreq_list)) { + rc = -EINVAL; + goto exit; + } + + rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); +exit: + device_unlock(&dev->dev); + + nfc_put_device(dev); + + return rc; +} + +static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx; + char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], + sizeof(firmware_name)); + + rc = nfc_fw_download(dev, firmware_name); + + nfc_put_device(dev); + return rc; +} + +int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, + u32 result) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_CMD_FW_DOWNLOAD); + if (!hdr) + goto free_msg; + + if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || + nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) || + nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + +static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx, se_idx; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_SE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + rc = nfc_enable_se(dev, se_idx); + + nfc_put_device(dev); + return rc; +} + +static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx, se_idx; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_SE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + rc = nfc_disable_se(dev, se_idx); + + nfc_put_device(dev); + return rc; +} + +static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev, + u32 portid, u32 seq, + struct netlink_callback *cb, + int flags) +{ + void *hdr; + struct nfc_se *se, *n; + + list_for_each_entry_safe(se, n, &dev->secure_elements, list) { + hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, + NFC_CMD_GET_SE); + if (!hdr) + goto nla_put_failure; + + if (cb) + genl_dump_check_consistent(cb, hdr, &nfc_genl_family); + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || + nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) || + nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) + goto nla_put_failure; + + if (genlmsg_end(msg, hdr) < 0) + goto nla_put_failure; + } + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int nfc_genl_dump_ses(struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; + struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; + bool first_call = false; + + if (!iter) { + first_call = true; + iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); + if (!iter) + return -ENOMEM; + cb->args[0] = (long) iter; + } + + mutex_lock(&nfc_devlist_mutex); + + cb->seq = nfc_devlist_generation; + + if (first_call) { + nfc_device_iter_init(iter); + dev = nfc_device_iter_next(iter); + } + + while (dev) { + int rc; + + rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); + if (rc < 0) + break; + + dev = nfc_device_iter_next(iter); + } + + mutex_unlock(&nfc_devlist_mutex); + + cb->args[1] = (long) dev; + + return skb->len; +} + +static int nfc_genl_dump_ses_done(struct netlink_callback *cb) +{ + struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; + + nfc_device_iter_exit(iter); + kfree(iter); + + return 0; +} + +struct se_io_ctx { + u32 dev_idx; + u32 se_idx; +}; + +static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err) +{ + struct se_io_ctx *ctx = context; + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) { + kfree(ctx); + return; + } + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_CMD_SE_IO); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) || + nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) || + nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); + + kfree(ctx); + + return; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + kfree(ctx); + + return; +} + +static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + struct se_io_ctx *ctx; + u32 dev_idx, se_idx; + u8 *apdu; + size_t apdu_len; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_SE_INDEX] || + !info->attrs[NFC_ATTR_SE_APDU]) + return -EINVAL; + + dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); + + dev = nfc_get_device(dev_idx); + if (!dev) + return -ENODEV; + + if (!dev->ops || !dev->ops->se_io) + return -ENOTSUPP; + + apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); + if (apdu_len == 0) + return -EINVAL; + + apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); + if (!apdu) + return -EINVAL; + + ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->dev_idx = dev_idx; + ctx->se_idx = se_idx; + + return dev->ops->se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); +} + +static const struct genl_ops nfc_genl_ops[] = { { .cmd = NFC_CMD_GET_DEVICE, .doit = nfc_genl_get_device, @@ -912,6 +1424,37 @@ static struct genl_ops nfc_genl_ops[] = { .doit = nfc_genl_llc_set_params, .policy = nfc_genl_policy, }, + { + .cmd = NFC_CMD_LLC_SDREQ, + .doit = nfc_genl_llc_sdreq, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_FW_DOWNLOAD, + .doit = nfc_genl_fw_download, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_ENABLE_SE, + .doit = nfc_genl_enable_se, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_DISABLE_SE, + .doit = nfc_genl_disable_se, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_GET_SE, + .dumpit = nfc_genl_dump_ses, + .done = nfc_genl_dump_ses_done, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_SE_IO, + .doit = nfc_genl_se_io, + .policy = nfc_genl_policy, + }, }; @@ -999,16 +1542,15 @@ int __init nfc_genl_init(void) { int rc; - rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops, - ARRAY_SIZE(nfc_genl_ops)); + rc = genl_register_family_with_ops_groups(&nfc_genl_family, + nfc_genl_ops, + nfc_genl_mcgrps); if (rc) return rc; - rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp); - netlink_register_notifier(&nl_notifier); - return rc; + return 0; } /** |