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pkg: lwip: do not panic on failing netdev->recv()

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This commit is contained in:
Oleg Hahm 2017-03-20 11:44:20 +01:00
parent 1b2b5d9df9
commit 409183d95d
1 changed files with 4 additions and 0 deletions
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4
pkg/lwip/contrib/netdev/lwip_netdev.c
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@ -215,6 +215,10 @@ static struct pbuf *_get_recv_pkt(netdev_t *dev)
{ {
int len = dev->driver->recv(dev, _tmp_buf, sizeof(_tmp_buf), NULL); int len = dev->driver->recv(dev, _tmp_buf, sizeof(_tmp_buf), NULL);
if (len < 0) {
DEBUG("lwip_netdev: an error occurred while reading the packet\n");
return NULL;
}
assert(((unsigned)len) <= UINT16_MAX); assert(((unsigned)len) <= UINT16_MAX);
struct pbuf *p = pbuf_alloc(PBUF_RAW, (u16_t)len, PBUF_POOL); struct pbuf *p = pbuf_alloc(PBUF_RAW, (u16_t)len, PBUF_POOL);