/**
* Delete a netconn and all its resources.
* The pcb is NOT freed (since we might not be in the right thread context do this).
*
* @param conn the netconn to free
*/
void
netconn_free(struct netconn *conn)
{
void *mem;
LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
/* Drain the recvmbox. */
if (conn->recvmbox != SYS_MBOX_NULL) {
while (sys_mbox_tryfetch(conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
if (conn->type == NETCONN_TCP) {
if(mem != NULL) {
pbuf_free((struct pbuf *)mem);
}
} else {
netbuf_delete((struct netbuf *)mem);
}
}
sys_mbox_free(conn->recvmbox);
conn->recvmbox = SYS_MBOX_NULL;
}
/* Drain the acceptmbox. */
if (conn->acceptmbox != SYS_MBOX_NULL) {
while (sys_mbox_tryfetch(conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
netconn_delete((struct netconn *)mem);
}
sys_mbox_free(conn->acceptmbox);
conn->acceptmbox = SYS_MBOX_NULL;
}
sys_sem_free(conn->op_completed);
conn->op_completed = SYS_SEM_NULL;
memp_free(MEMP_NETCONN, conn);
}
/**
* Delete rcvmbox and acceptmbox of a netconn and free the left-over data in
* these mboxes
*
* @param conn the netconn to free
* @bytes_drained bytes drained from recvmbox
* @accepts_drained pending connections drained from acceptmbox
*/
static void
netconn_drain(struct netconn *conn)
{
void *mem;
#if LWIP_TCP
struct pbuf *p;
#endif /* LWIP_TCP */
/* This runs in tcpip_thread, so we don't need to lock against rx packets */
/* Delete and drain the recvmbox. */
if (sys_mbox_valid(&conn->recvmbox)) {
while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
#if LWIP_TCP
if (conn->type == NETCONN_TCP) {
if(mem != NULL) {
p = (struct pbuf*)mem;
/* pcb might be set to NULL already by err_tcp() */
if (conn->pcb.tcp != NULL) {
tcp_recved(conn->pcb.tcp, p->tot_len);
}
pbuf_free(p);
}
} else
#endif /* LWIP_TCP */
{
netbuf_delete((struct netbuf *)mem);
}
}
sys_mbox_free(&conn->recvmbox);
sys_mbox_set_invalid(&conn->recvmbox);
}
/* Delete and drain the acceptmbox. */
#if LWIP_TCP
if (sys_mbox_valid(&conn->acceptmbox)) {
while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
struct netconn *newconn = (struct netconn *)mem;
/* Only tcp pcbs have an acceptmbox, so no need to check conn->type */
/* pcb might be set to NULL already by err_tcp() */
if (conn->pcb.tcp != NULL) {
tcp_accepted(conn->pcb.tcp);
}
/* drain recvmbox */
netconn_drain(newconn);
if (newconn->pcb.tcp != NULL) {
tcp_abort(newconn->pcb.tcp);
newconn->pcb.tcp = NULL;
}
netconn_free(newconn);
}
sys_mbox_free(&conn->acceptmbox);
sys_mbox_set_invalid(&conn->acceptmbox);
}
#endif /* LWIP_TCP */
}
static void
pxudp_pcb_forward_inbound(struct pxudp *pxudp)
{
struct pbuf *p;
u32_t timo;
err_t error;
if (!sys_mbox_valid(&pxudp->inmbox)) {
return;
}
timo = sys_mbox_tryfetch(&pxudp->inmbox, (void **)&p);
if (timo == SYS_MBOX_EMPTY) {
return;
}
error = udp_send(pxudp->pcb, p);
if (error != ERR_OK) {
DPRINTF(("%s: udp_send(pcb %p) err %d\n",
__func__, (void *)pxudp, error));
}
pbuf_free(p);
/*
* If we enabled counting in pxudp_pcb_forward_outbound() check
* that we have (all) the reply(s).
*/
if (pxudp->count > 0) {
--pxudp->count;
if (pxudp->count == 0) {
pxudp_pcb_expired(pxudp);
}
}
}
static void
fwtcp_pcb_delete(void *arg)
{
struct fwtcp *fwtcp = (struct fwtcp *)arg;
void *data;
u32_t timo;
timo = sys_mbox_tryfetch(&fwtcp->connmbox, &data);
LWIP_ASSERT1(timo == SYS_MBOX_EMPTY);
LWIP_UNUSED_ARG(timo); /* only in assert */
sys_mbox_free(&fwtcp->connmbox);
free(fwtcp);
}
static void
pxudp_drain_inmbox(struct pxudp *pxudp)
{
void *ptr;
if (!sys_mbox_valid(&pxudp->inmbox)) {
return;
}
while (sys_mbox_tryfetch(&pxudp->inmbox, &ptr) != SYS_MBOX_EMPTY) {
struct pbuf *p = (struct pbuf *)ptr;
pbuf_free(p);
}
sys_mbox_free(&pxudp->inmbox);
sys_mbox_set_invalid(&pxudp->inmbox);
}
void
fwtcp_pcb_connect(void *arg)
{
struct fwtcp *fwtcp = (struct fwtcp *)arg;
struct pxtcp *pxtcp;
u32_t timo;
if (!sys_mbox_valid(&fwtcp->connmbox)) {
return;
}
pxtcp = NULL;
timo = sys_mbox_tryfetch(&fwtcp->connmbox, (void **)&pxtcp);
if (timo == SYS_MBOX_EMPTY) {
return;
}
LWIP_ASSERT1(pxtcp != NULL);
/* hand off to pxtcp */
pxtcp_pcb_connect(pxtcp, &fwtcp->fwspec);
}