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fixed bug #35435: No pcb state check before adding it to time-wait queue while closing

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goldsimon 2012-02-11 18:15:17 +01:00
parent 1d6347c9b0
commit 9a95c2ff08
2 changed files with 13 additions and 8 deletions
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4
CHANGELOG
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@ -76,6 +76,10 @@ HISTORY
++ Bugfixes:
2012-02-11: Simon Goldschmidt
* tcp.c: fixed bug #35435: No pcb state check before adding it to time-wait
queue while closing
2012-01-22: Simon Goldschmidt
* tcp.c, tcp_in.c: fixed bug #35305: pcb may be freed too early on shutdown(WR)

17
src/core/tcp.c
View File

@ -174,7 +174,7 @@ tcp_close_shutdown(struct tcp_pcb *pcb, u8_t rst_on_unacked_data)
{
err_t err;
if (rst_on_unacked_data && (pcb->state != LISTEN)) {
if (rst_on_unacked_data && ((pcb->state == ESTABLISHED) || (pcb->state == CLOSE_WAIT))) {
if ((pcb->refused_data != NULL) || (pcb->rcv_wnd != TCP_WND)) {
/* Not all data received by application, send RST to tell the remote
side about this. */
@ -186,14 +186,15 @@ tcp_close_shutdown(struct tcp_pcb *pcb, u8_t rst_on_unacked_data)
pcb->local_port, pcb->remote_port, PCB_ISIPV6(pcb));
tcp_pcb_purge(pcb);
/* TODO: to which state do we move now? */
/* move to TIME_WAIT since we close actively */
TCP_RMV_ACTIVE(pcb);
pcb->state = TIME_WAIT;
TCP_REG(&tcp_tw_pcbs, pcb);
if (pcb->state == ESTABLISHED) {
/* move to TIME_WAIT since we close actively */
pcb->state = TIME_WAIT;
TCP_REG(&tcp_tw_pcbs, pcb);
} else {
/* CLOSE_WAIT: deallocate the pcb since we already sent a RST for it */
memp_free(MEMP_TCP_PCB, pcb);
}
return ERR_OK;
}
}