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MYNEWT-736 NimBLE - UART xport can't send multibuf

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The UART transport assumes outgoing ACL data packets consist of a single
mbuf. If the chain contains multiple buffers, the later part of the
outgoing packet consists of all zeros.

X-Original-Commit: 7669e9715e9eee5cccea0074208e6915258d3d3a
This commit is contained in:
Christopher Collins
2017-04-19 20:13:59 -07:00
parent c15be1f9ab
commit dd09cf7bcc
1 changed files with 10 additions and 2 deletions
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nimble/transport/uart/src/ble_hci_uart.c
+10 -2
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@@ -275,6 +275,7 @@ ble_hci_uart_tx_pkt_type(void)
static int
ble_hci_uart_tx_char(void *arg)
{
uint8_t u8;
int rc = -1;
switch (ble_hci_uart_state.tx_type) {
@@ -293,12 +294,19 @@ ble_hci_uart_tx_char(void *arg)
break;
case BLE_HCI_UART_H4_ACL:
rc = *OS_MBUF_DATA(ble_hci_uart_state.tx_acl, uint8_t *);
/* Copy the first unsent byte from the tx buffer and remove it from the
* source.
*/
os_mbuf_copydata(ble_hci_uart_state.tx_acl, 0, 1, &u8);
os_mbuf_adj(ble_hci_uart_state.tx_acl, 1);
if (!OS_MBUF_PKTLEN(ble_hci_uart_state.tx_acl)) {
/* Free the tx buffer if this is the last byte to send. */
if (OS_MBUF_PKTLEN(ble_hci_uart_state.tx_acl) == 0) {
os_mbuf_free_chain(ble_hci_uart_state.tx_acl);
ble_hci_uart_state.tx_type = BLE_HCI_UART_H4_NONE;
}
rc = u8;
break;
}