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Added check to prevent tcp_pcb->snd_queuelen from overflowing.
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@ -238,6 +238,9 @@ HISTORY
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++ Bug fixes:
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2007-06-28 Simon Goldschmidt
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* tcp_out.c: Added check to prevent tcp_pcb->snd_queuelen from overflowing.
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2007-06-28 Simon Goldschmidt
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* tcp.h: Fixed bug #20287: Fixed nagle algorithm (sending was done too early if
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a segment contained chained pbufs)
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@ -158,7 +158,8 @@ tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len,
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/* If total number of pbufs on the unsent/unacked queues exceeds the
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* configured maximum, return an error */
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queuelen = pcb->snd_queuelen;
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if (queuelen >= TCP_SND_QUEUELEN) {
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/* check for configured max queuelen and possible overflow of u8_t */
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if ((queuelen >= TCP_SND_QUEUELEN) || (queuelen > 253)) {
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LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 3, ("tcp_enqueue: too long queue %"U16_F" (max %"U16_F")\n", queuelen, TCP_SND_QUEUELEN));
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TCP_STATS_INC(tcp.memerr);
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return ERR_MEM;
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@ -261,7 +262,8 @@ tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len,
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/* Now that there are more segments queued, we check again if the
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length of the queue exceeds the configured maximum. */
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if (queuelen > TCP_SND_QUEUELEN) {
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/* check for configured max queuelen and possible overflow of u8_t */
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if ((queuelen > TCP_SND_QUEUELEN) || (queuelen > 253)) {
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LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: queue too long %"U16_F" (%"U16_F")\n", queuelen, TCP_SND_QUEUELEN));
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goto memerr;
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}
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