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fix memory leak in netif_loop_output if tcpip_try_callback fails

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Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This commit is contained in:
Nick Ballhorn-Wagner 2020-02-21 17:17:08 +01:00 committed by Simon Goldschmidt
parent 8c43d83689
commit b1f8ce8769
2 changed files with 23 additions and 5 deletions
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24
src/core/netif.c
View File

@ -168,6 +168,9 @@ netif_loopif_init(struct netif *netif)
#if LWIP_LOOPIF_MULTICAST
netif_set_flags(netif, NETIF_FLAG_IGMP);
#endif
#if LWIP_NETIF_LOOPBACK_MULTITHREADING
netif->reschedule_poll = 0;
#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
NETIF_SET_CHECKSUM_CTRL(netif, NETIF_CHECKSUM_DISABLE_ALL);
return ERR_OK;
}
@ -1066,11 +1069,12 @@ netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callb
/**
* @ingroup netif
* Send an IP packet to be received on the same netif (loopif-like).
* The pbuf is simply copied and handed back to netif->input.
* In multithreaded mode, this is done directly since netif->input must put
* the packet on a queue.
* In callback mode, the packet is put on an internal queue and is fed to
* The pbuf is copied and added to an internal queue which is fed to
* netif->input by netif_poll().
* In multithreaded mode, the call to netif_poll() is queued to be done on the
* TCP/IP thread.
* In callback mode, the user has the responsibility to call netif_poll() in
* the main loop of their application.
*
* @param netif the lwip network interface structure
* @param p the (IP) packet to 'send'
@ -1147,6 +1151,12 @@ netif_loop_output(struct netif *netif, struct pbuf *p)
LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
netif->loop_last->next = r;
netif->loop_last = last;
#if LWIP_NETIF_LOOPBACK_MULTITHREADING
if (netif->reschedule_poll) {
schedule_poll = 1;
netif->reschedule_poll = 0;
}
#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
} else {
netif->loop_first = r;
netif->loop_last = last;
@ -1164,7 +1174,11 @@ netif_loop_output(struct netif *netif, struct pbuf *p)
#if LWIP_NETIF_LOOPBACK_MULTITHREADING
/* For multithreading environment, schedule a call to netif_poll */
if (schedule_poll) {
tcpip_try_callback((tcpip_callback_fn)netif_poll, netif);
if (tcpip_try_callback((tcpip_callback_fn)netif_poll, netif) != ERR_OK) {
SYS_ARCH_PROTECT(lev);
netif->reschedule_poll = 1;
SYS_ARCH_UNPROTECT(lev);
}
}
#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */

4
src/include/lwip/netif.h
View File

@ -386,6 +386,10 @@ struct netif {
#if LWIP_LOOPBACK_MAX_PBUFS
u16_t loop_cnt_current;
#endif /* LWIP_LOOPBACK_MAX_PBUFS */
#if LWIP_NETIF_LOOPBACK_MULTITHREADING
/* Used if the original scheduling failed. */
u8_t reschedule_poll;
#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
#endif /* ENABLE_LOOPBACK */
};