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tcp: send RST to input netif when no pcb is available

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If we know there's no matchin pcb (e.g. for routing), don't even
try to pass NULL but instead send the RST to the input netif.

See also patch #9988.
This commit is contained in:
Simon Goldschmidt
2021-03-04 21:10:28 +01:00
parent 1f4a029d10
commit 3666dcc66c
3 changed files with 121 additions and 52 deletions
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3
src/include/lwip/priv/tcp_priv.h
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@@ -464,6 +464,9 @@ void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg);
void tcp_rst(const struct tcp_pcb* pcb, u32_t seqno, u32_t ackno,
const ip_addr_t *local_ip, const ip_addr_t *remote_ip,
u16_t local_port, u16_t remote_port);
void tcp_rst_netif(struct netif *netif, u32_t seqno, u32_t ackno,
const ip_addr_t *local_ip, const ip_addr_t *remote_ip,
u16_t local_port, u16_t remote_port);
u32_t tcp_next_iss(struct tcp_pcb *pcb);