The new buffer is allocated in g_attrib_new() and it will be used to
send/receive PDUs. The buffer size is the MTU read from L2CAP channel
limited to ATT_MAX_MTU. Functions to handle the buffer size were also
created.
---
attrib/gattrib.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
attrib/gattrib.h | 3 +++
2 files changed, 49 insertions(+), 0 deletions(-)
diff --git a/attrib/gattrib.c b/attrib/gattrib.c
index 07e56de..290cd96 100644
--- a/attrib/gattrib.c
+++ b/attrib/gattrib.c
@@ -40,6 +40,8 @@
struct _GAttrib {
GIOChannel *io;
gint refs;
+ uint8_t *buf;
+ int buflen;
guint read_watch;
guint write_watch;
guint timeout_watch;
@@ -193,6 +195,8 @@ static void attrib_destroy(GAttrib *attrib)
g_io_channel_unref(attrib->io);
}
+ g_free(attrib->buf);
+
if (attrib->destroy)
attrib->destroy(attrib->destroy_user_data);
@@ -386,6 +390,7 @@ done:
GAttrib *g_attrib_new(GIOChannel *io)
{
struct _GAttrib *attrib;
+ uint16_t omtu;
g_io_channel_set_encoding(io, NULL, NULL);
g_io_channel_set_buffered(io, FALSE);
@@ -401,6 +406,17 @@ GAttrib *g_attrib_new(GIOChannel *io)
G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
received_data, attrib);
+ if (bt_io_get(attrib->io, BT_IO_L2CAP, NULL,
+ BT_IO_OPT_OMTU, &omtu,
+ BT_IO_OPT_INVALID)) {
+ if (omtu > ATT_MAX_MTU)
+ omtu = ATT_MAX_MTU;
+ } else
+ omtu = ATT_DEFAULT_LE_MTU;
+
+ attrib->buf = g_malloc0(omtu);
+ attrib->buflen = omtu;
+
return g_attrib_ref(attrib);
}
@@ -504,6 +520,36 @@ gboolean g_attrib_set_debug(GAttrib *attrib,
return TRUE;
}
+uint8_t *g_attrib_get_buffer(GAttrib *attrib, int *len)
+{
+ if (len == NULL)
+ return NULL;
+
+ *len = attrib->buflen;
+
+ return attrib->buf;
+}
+
+gboolean g_attrib_set_mtu(GAttrib *attrib, int mtu)
+{
+ if (mtu < ATT_DEFAULT_LE_MTU)
+ mtu = ATT_DEFAULT_LE_MTU;
+
+ if (mtu > ATT_MAX_MTU)
+ mtu = ATT_MAX_MTU;
+
+ if (!bt_io_set(attrib->io, BT_IO_L2CAP, NULL,
+ BT_IO_OPT_OMTU, mtu,
+ BT_IO_OPT_INVALID))
+ return FALSE;
+
+ attrib->buf = g_realloc(attrib->buf, mtu);
+
+ attrib->buflen = mtu;
+
+ return TRUE;
+}
+
guint g_attrib_register(GAttrib *attrib, guint8 opcode,
GAttribNotifyFunc func, gpointer user_data,
GDestroyNotify notify)
diff --git a/attrib/gattrib.h b/attrib/gattrib.h
index f25208d..4c49879 100644
--- a/attrib/gattrib.h
+++ b/attrib/gattrib.h
@@ -68,6 +68,9 @@ guint g_attrib_register(GAttrib *attrib, guint8 opcode,
gboolean g_attrib_is_encrypted(GAttrib *attrib);
+uint8_t *g_attrib_get_buffer(GAttrib *attrib, int *len);
+gboolean g_attrib_set_mtu(GAttrib *attrib, int mtu);
+
gboolean g_attrib_unregister(GAttrib *attrib, guint id);
gboolean g_attrib_unregister_all(GAttrib *attrib);
--
1.7.0.4
--
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