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fixed bug #37614 "Errors from ipX_output are not processed". Now tcp_output(_segment) checks for the return value of ipX_output and does not try to send more on error. A netif driver can call tcp_txnow() (from tcpip_thread!) to try to send again if TX buffers are available again.

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This commit is contained in:
goldsimon
2015-02-17 08:02:34 +01:00
parent 90db821036
commit 5d13b5a2fb
5 changed files with 113 additions and 42 deletions
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9
src/include/lwip/tcp_impl.h
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@@ -61,6 +61,11 @@ void tcp_tmr (void); /* Must be called every
void tcp_slowtmr (void);
void tcp_fasttmr (void);
/* Call this from a netif driver (watch out for threading issues!) that has
returned a memory error on transmit and now has free buffers to send more.
This iterates all active pcbs that had an error and tries to call
tcp_output, so use this with care as it might slow down the system. */
void tcp_txnow (void);
/* Only used by IP to pass a TCP segment to TCP: */
void tcp_input (struct pbuf *p, struct netif *inp);
@@ -490,8 +495,8 @@ void tcp_rst_impl(u32_t seqno, u32_t ackno,
u32_t tcp_next_iss(void);
void tcp_keepalive(struct tcp_pcb *pcb);
void tcp_zero_window_probe(struct tcp_pcb *pcb);
err_t tcp_keepalive(struct tcp_pcb *pcb);
err_t tcp_zero_window_probe(struct tcp_pcb *pcb);
#if TCP_CALCULATE_EFF_SEND_MSS
u16_t tcp_eff_send_mss_impl(u16_t sendmss, ipX_addr_t *dest