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lwip: fix the bug that failed to create socket

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Fix the bug that failed to create nonblocking TCP or UDP socket after several times socket create/close
This commit is contained in:
Liu Zhi Fu
2018-09-16 18:28:45 +08:00
committed by zhangyanjiao
parent 889c80ec1c
commit bb48077a81
2 changed files with 23 additions and 31 deletions
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45
components/lwip/api/api_msg.c
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@@ -945,38 +945,33 @@ lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM SIG_CLO
#endif /* LWIP_SO_LINGER */
} else {
if (err == ERR_MEM) {
/* Closing failed because of memory shortage */
if (netconn_is_nonblocking(conn)) {
/* Nonblocking close failed */
close_finished = 1;
err = ERR_WOULDBLOCK;
} else {
/* Blocking close, check the timeout */
/* Closing failed because of memory shortage, try again later. Even for
nonblocking netconns, we have to wait since no standard socket application
is prepared for close failing because of resource shortage.
Check the timeout: this is kind of an lwip addition to the standard sockets:
we wait for some time when failing to allocate a segment for the FIN */
#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER
s32_t close_timeout = LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT;
/* this is kind of an lwip addition to the standard sockets: we wait
for some time when failing to allocate a segment for the FIN */
s32_t close_timeout = LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT;
#if LWIP_SO_SNDTIMEO
if (conn->send_timeout > 0) {
close_timeout = conn->send_timeout;
}
if (conn->send_timeout > 0) {
close_timeout = conn->send_timeout;
}
#endif /* LWIP_SO_SNDTIMEO */
#if LWIP_SO_LINGER
if (conn->linger >= 0) {
/* use linger timeout (seconds) */
close_timeout = conn->linger * 1000U;
}
if (conn->linger >= 0) {
/* use linger timeout (seconds) */
close_timeout = conn->linger * 1000U;
}
#endif
if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= close_timeout) {
if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= close_timeout) {
#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
if (conn->current_msg->msg.sd.polls_left == 0) {
if (conn->current_msg->msg.sd.polls_left == 0) {
#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
close_finished = 1;
if (close) {
/* in this case, we want to RST the connection */
tcp_abort(tpcb);
err = ERR_OK;
}
close_finished = 1;
if (close) {
/* in this case, we want to RST the connection */
tcp_abort(tpcb);
err = ERR_OK;
}
}
} else {