/**
* Close a TCP pcb contained in a netconn
* Called from netconn_close
*
* @param msg the api_msg_msg pointing to the connection
*/
void
do_close(struct api_msg_msg *msg)
{
#if LWIP_TCP
/* @todo: abort running write/connect? */
if ((msg->conn->state != NETCONN_NONE) && (msg->conn->state != NETCONN_LISTEN)) {
/* this only happens for TCP netconns */
LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP);
msg->err = ERR_INPROGRESS;
} else if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
if ((msg->msg.sd.shut != NETCONN_SHUT_RDWR) && (msg->conn->state == NETCONN_LISTEN)) {
/* LISTEN doesn't support half shutdown */
msg->err = ERR_CONN;
} else {
if (msg->msg.sd.shut & NETCONN_SHUT_RD) {
/* Drain and delete mboxes */
netconn_drain(msg->conn);
}
LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
msg->conn->write_offset == 0);
msg->conn->state = NETCONN_CLOSE;
msg->conn->current_msg = msg;
do_close_internal(msg->conn);
/* for tcp netconns, do_close_internal ACKs the message */
return;
}
} else
#endif /* LWIP_TCP */
{
msg->err = ERR_VAL;
}
sys_sem_signal(&msg->conn->op_completed);
}
/**
* Delete the pcb inside a netconn.
* Called from netconn_delete.
*
* @param msg the api_msg_msg pointing to the connection
*/
void
lwip_netconn_do_delconn(struct api_msg_msg *msg)
{
/* @todo TCP: abort running write/connect? */
if ((msg->conn->state != NETCONN_NONE) &&
(msg->conn->state != NETCONN_LISTEN) &&
(msg->conn->state != NETCONN_CONNECT)) {
/* this only happens for TCP netconns */
LWIP_ASSERT("NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP",
NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP);
msg->err = ERR_INPROGRESS;
} else {
LWIP_ASSERT("blocking connect in progress",
(msg->conn->state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn));
/* Drain and delete mboxes */
netconn_drain(msg->conn);
if (msg->conn->pcb.tcp != NULL) {
switch (NETCONNTYPE_GROUP(msg->conn->type)) {
#if LWIP_RAW
case NETCONN_RAW:
raw_remove(msg->conn->pcb.raw);
break;
#endif /* LWIP_RAW */
#if LWIP_UDP
case NETCONN_UDP:
msg->conn->pcb.udp->recv_arg = NULL;
udp_remove(msg->conn->pcb.udp);
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL &&
msg->conn->write_offset == 0);
msg->conn->state = NETCONN_CLOSE;
msg->msg.sd.shut = NETCONN_SHUT_RDWR;
msg->conn->current_msg = msg;
lwip_netconn_do_close_internal(msg->conn);
/* API_EVENT is called inside lwip_netconn_do_close_internal, before releasing
the application thread, so we can return at this point! */
return;
#endif /* LWIP_TCP */
default:
break;
}
msg->conn->pcb.tcp = NULL;
}
/* tcp netconns don't come here! */
/* @todo: this lets select make the socket readable and writable,
which is wrong! errfd instead? */
API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
}
if (sys_sem_valid(&msg->conn->op_completed)) {
sys_sem_signal(&msg->conn->op_completed);
}
}
/**
* 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 */
}
