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Merge pull request #2713 from rgrr/ncm-fix-in-tud_network_recv_renew

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NCM: avoid recursions in tud_network_recv_renew()
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HiFiPhile 2024-11-01 22:22:31 +01:00 committed by GitHub
commit 038be21e4d
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1 changed files with 25 additions and 3 deletions
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28
src/class/net/ncm_device.c
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@ -110,8 +110,12 @@ typedef struct {
NOTIFICATION_SPEED,
NOTIFICATION_CONNECTED,
NOTIFICATION_DONE
} notification_xmit_state; // state of notification transmission
bool notification_xmit_is_running; // notification is currently transmitted
} notification_xmit_state; // state of notification transmission
bool notification_xmit_is_running; // notification is currently transmitted
// misc
bool tud_network_recv_renew_active; // tud_network_recv_renew() is active (avoid recursive invocations)
bool tud_network_recv_renew_process_again; // tud_network_recv_renew() should process again
} ncm_interface_t;
CFG_TUD_MEM_SECTION CFG_TUD_MEM_ALIGN tu_static ncm_interface_t ncm_interface;
@ -689,11 +693,29 @@ void tud_network_xmit(void *ref, uint16_t arg) {
/**
* Keep the receive logic busy and transfer pending packets to the glue logic.
* Avoid recursive calls due to wrong expectations of the net glue logic,
* see https://github.com/hathach/tinyusb/issues/2711
*/
void tud_network_recv_renew(void) {
TU_LOG_DRV("tud_network_recv_renew()\n");
recv_transfer_datagram_to_glue_logic();
ncm_interface.tud_network_recv_renew_process_again = true;
if (ncm_interface.tud_network_recv_renew_active) {
TU_LOG_DRV("Re-entrant into tud_network_recv_renew, will process later\n");
return;
}
while (ncm_interface.tud_network_recv_renew_process_again) {
ncm_interface.tud_network_recv_renew_process_again = false;
// If the current function is called within recv_transfer_datagram_to_glue_logic,
// tud_network_recv_renew_process_again will become true, and the loop will run again
// Otherwise the loop will not run again
ncm_interface.tud_network_recv_renew_active = true;
recv_transfer_datagram_to_glue_logic();
ncm_interface.tud_network_recv_renew_active = false;
}
recv_try_to_start_new_reception(ncm_interface.rhport);
} // tud_network_recv_renew