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Fix bug #21699: segment leak in ooseq processing when last data packet was lost (free last segment if FIN is already received)

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goldsimon 2007-12-13 20:24:39 +00:00
parent 4653974c2a
commit d2fa5c91a7
1 changed files with 18 additions and 5 deletions
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23
src/core/tcp_in.c
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@ -1011,11 +1011,24 @@ tcp_receive(struct tcp_pcb *pcb)
and pass the data to the application. */ and pass the data to the application. */
#if TCP_QUEUE_OOSEQ #if TCP_QUEUE_OOSEQ
if (pcb->ooseq != NULL && if (pcb->ooseq != NULL &&
TCP_SEQ_LEQ(pcb->ooseq->tcphdr->seqno, seqno + inseg.len)) { TCP_SEQ_LEQ(pcb->ooseq->tcphdr->seqno, seqno + inseg.len)) {
/* We have to trim the second edge of the incoming if (TCP_SEQ_LEQ(pcb->ooseq->tcphdr->seqno, seqno + inseg.len)) {
segment. */ pcb->ooseq = pcb->ooseq;
inseg.len = (u16_t)(pcb->ooseq->tcphdr->seqno - seqno); }
pbuf_realloc(inseg.p, inseg.len); if (pcb->ooseq->len > 0) {
/* We have to trim the second edge of the incoming
segment. */
inseg.len = (u16_t)(pcb->ooseq->tcphdr->seqno - seqno);
pbuf_realloc(inseg.p, inseg.len);
} else {
/* does the ooseq segment contain only flags that are in inseg also? */
if ((TCPH_FLAGS(inseg.tcphdr) & (TCP_FIN|TCP_SYN)) ==
(TCPH_FLAGS(pcb->ooseq->tcphdr) & (TCP_FIN|TCP_SYN))) {
struct tcp_seg *old_ooseq = pcb->ooseq;
pcb->ooseq = pcb->ooseq->next;
memp_free(MEMP_TCP_SEG, old_ooseq);
}
}
} }
#endif /* TCP_QUEUE_OOSEQ */ #endif /* TCP_QUEUE_OOSEQ */