npp: Implement npp_push

NPP is simple: Get the NDEF, include it in an NPP NDEF entry, add an
header and just send it to the peer. That's it.

diff --git a/plugins/npp.c b/plugins/npp.c
index 1796ffb..6bed302 100644 (file)
--- a/plugins/npp.c
+++ b/plugins/npp.c
@@ -154,12 +154,54 @@ static bool npp_read(int client_fd,
        return false;
 }
 
+static int npp_push(int fd, uint32_t adapter_idx, uint32_t target_idx,
+                       struct near_ndef_message *ndef,
+                       near_device_io_cb cb,
+                       gpointer data)
+{
+       struct p2p_npp_frame *frame;
+       struct p2p_npp_ndef_entry *entry;
+       size_t frame_length;
+       int err;
+
+       DBG("");
+
+       frame_length = sizeof(struct p2p_npp_frame) +
+                                       sizeof(struct p2p_npp_ndef_entry) +
+                                       ndef->length;
+       frame = g_try_malloc0(frame_length);
+       if (!frame)
+               return -ENOMEM;
+
+       entry = &frame->ndefs[0];
+
+       frame->version = NPP_VERSION;
+       frame->n_ndef = GINT_TO_BE(1);
+
+       entry->action = NPP_DEFAULT_ACTION;
+       entry->ndef_length = GINT_TO_BE(ndef->length);
+       memcpy(entry->ndef, ndef->data, ndef->length);
+
+       DBG("Sending %zd bytes", frame_length);
+
+       err = send(fd, frame, frame_length, MSG_DONTWAIT);
+
+       g_free(frame);
+
+       cb(adapter_idx, target_idx, err < 0 ? err : 0);
+
+       close(fd);
+
+       return err;
+}
+
 struct near_p2p_driver npp_driver = {
        .name = "NPP",
        .service_name = NEAR_DEVICE_SN_NPP,
        .fallback_service_name = NULL,
        .sock_type = SOCK_STREAM,
        .read = npp_read,
+       .push = npp_push,
 };
 
 int npp_init(void)