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fix(lwip): fix exist more pbufs after TX_SINGLE_PBUF enabled

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This commit is contained in:
Zhang Jun Hao
2018-07-24 16:58:56 +08:00
parent 7d4b222028
commit c250b3ed2e
1 changed files with 6 additions and 0 deletions
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6
components/lwip/lwip/src/core/tcp_out.c
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@ -481,6 +481,7 @@ tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags)
LWIP_ASSERT("inconsistent oversize vs. len", (oversize == 0) || (pos == len));
#endif /* TCP_OVERSIZE */
#if !LWIP_NETIF_TX_SINGLE_PBUF
/*
* Phase 2: Chain a new pbuf to the end of pcb->unsent.
*
@ -491,6 +492,10 @@ tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags)
* We don't extend segments containing SYN/FIN flags or options
* (len==0). The new pbuf is kept in concat_p and pbuf_cat'ed at
* the end.
*
* This phase is skipped for LWIP_NETIF_TX_SINGLE_PBUF as we could only execute
* it after rexmit puts a segment from unacked to unsent and at this point,
* oversize info is lost.
*/
if ((pos < len) && (space > 0) && (last_unsent->len > 0)) {
u16_t seglen = LWIP_MIN(space, len - pos);
@ -543,6 +548,7 @@ tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags)
pos += seglen;
}
#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */
} else {
#if TCP_OVERSIZE
LWIP_ASSERT("unsent_oversize mismatch (pcb->unsent is NULL)",