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Kieran Mansley - kjm25@cam.ac.uk - 23rd July 2004

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Now handle CLOSED state in tcp_close() explicitely, and free the pcb.
This is for the case that a pcb has been allocated but never used (so
is in the default "CLOSED" state) and needs to be freed.
This commit is contained in:
kieranm 2004-07-23 13:07:00 +00:00
parent fb5452910f
commit eb69032773
1 changed files with 12 additions and 0 deletions
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12
src/core/tcp.c
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@ -122,6 +122,18 @@ tcp_close(struct tcp_pcb *pcb)
LWIP_DEBUGF(TCP_DEBUG, ("\n"));
#endif /* TCP_DEBUG */
switch (pcb->state) {
case CLOSED:
/* Closing a pcb in the CLOSED state might seem erroneous,
* however, it is in this state once allocated and as yet unused
* and the user needs some way to free it should the need arise.
* Calling tcp_close() with a pcb that has already been closed, (i.e. twice)
* or for a pcb that has been used and then entered the CLOSED state
* is erroneous, but this should never happen as the pcb has in those cases
* been freed, and so any remaining handles are bogus. */
err = ERR_OK;
memp_free(MEMP_TCP_PCB, pcb);
pcb = NULL;
break;
case LISTEN:
err = ERR_OK;
tcp_pcb_remove((struct tcp_pcb **)&tcp_listen_pcbs.pcbs, pcb);