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tcp: eliminate some redundant route lookups

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Now that tcp_connect() always determines the outgoing netif with a
route lookup, we can compute the effective MSS without doing the same
route lookup again. The outgoing netif is already known from one
other location that computes the MSS, so we can eliminate a redundant
route lookup there too. Reduce some macro clutter as a side effect.
This commit is contained in:
David van Moolenbroek
2017-01-26 23:33:57 +00:00
committed by sg
parent 29ddfd1d71
commit 3d80e51b2a
3 changed files with 9 additions and 21 deletions
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14
src/include/lwip/priv/tcp_priv.h
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@@ -459,16 +459,10 @@ err_t tcp_zero_window_probe(struct tcp_pcb *pcb);
void tcp_trigger_input_pcb_close(void);
#if TCP_CALCULATE_EFF_SEND_MSS
u16_t tcp_eff_send_mss_impl(u16_t sendmss, const ip_addr_t *dest
#if LWIP_IPV6 || LWIP_IPV4_SRC_ROUTING
, const ip_addr_t *src
#endif /* LWIP_IPV6 || LWIP_IPV4_SRC_ROUTING */
);
#if LWIP_IPV6 || LWIP_IPV4_SRC_ROUTING
#define tcp_eff_send_mss(sendmss, src, dest) tcp_eff_send_mss_impl(sendmss, dest, src)
#else /* LWIP_IPV6 || LWIP_IPV4_SRC_ROUTING */
#define tcp_eff_send_mss(sendmss, src, dest) tcp_eff_send_mss_impl(sendmss, dest)
#endif /* LWIP_IPV6 || LWIP_IPV4_SRC_ROUTING */
u16_t tcp_eff_send_mss_netif(u16_t sendmss, struct netif *outif,
const ip_addr_t *dest);
#define tcp_eff_send_mss(sendmss, src, dest) \
tcp_eff_send_mss_netif(sendmss, ip_route(src, dest), dest)
#endif /* TCP_CALCULATE_EFF_SEND_MSS */
#if LWIP_CALLBACK_API