1 files changed, 169 insertions, 0 deletions

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 63975c039b85..73fd51098f4d 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -56,6 +56,12 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
         [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 },
+};
+
+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,
@@ -351,6 +357,74 @@ 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(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+
+nla_put_failure:
+        genlmsg_cancel(msg, hdr);
+
+free_msg:
+        nlmsg_free(msg);
+
+        nfc_llcp_free_sdp_tlv_list(sdres_list);
+
+        return rc;
+}
+
 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
                                 u32 portid, u32 seq,
                                 struct netlink_callback *cb,
@@ -862,6 +936,96 @@ exit:
         return rc;
 }
 
+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 struct genl_ops nfc_genl_ops[] = {
         {
                 .cmd = NFC_CMD_GET_DEVICE,
@@ -916,6 +1080,11 @@ 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,
+        },
 };