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Fixed bug #36167 tcp server crash when client closes (maximum window)
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@ -100,6 +100,9 @@ HISTORY
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++ Bugfixes:
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2014-04-08: Simon Goldschmidt
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* tcp.c: Fixed bug #36167 tcp server crash when client closes (maximum window)
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2014-04-06: Simon Goldschmidt
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* tcp_in.c: Fixed bug #36210 lwIP does not elicit an empty ACK when received
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unacceptable ACK
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@ -650,12 +650,20 @@ tcp_recved(struct tcp_pcb *pcb, u16_t len)
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/* pcb->state LISTEN not allowed here */
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LWIP_ASSERT("don't call tcp_recved for listen-pcbs",
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pcb->state != LISTEN);
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LWIP_ASSERT("tcp_recved: len would wrap rcv_wnd\n",
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len <= TCPWND_MAX - pcb->rcv_wnd);
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pcb->rcv_wnd += len;
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if (pcb->rcv_wnd > TCP_WND) {
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pcb->rcv_wnd = TCP_WND;
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} else if(pcb->rcv_wnd == 0) {
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/* rcv_wnd overflowed */
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if ((pcb->state == CLOSE_WAIT) || (pcb->state == LAST_ACK)) {
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/* In passive close, we allow this, since the FIN bit is added to rcv_wnd
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by the stack itself, since it is not mandatory for an application
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to call tcp_recved() for the FIN bit, but e.g. the netconn API does so. */
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pcb->rcv_wnd = TCP_WND;
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} else {
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LWIP_ASSERT("tcp_recved: len wrapped rcv_wnd\n", 0);
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}
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}
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wnd_inflation = tcp_update_rcv_ann_wnd(pcb);
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