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fixed bug #34111 RST for ACK to listening pcb has wrong seqno

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This commit is contained in:
Simon Goldschmidt
2011-09-01 21:00:11 +02:00
parent 0a5755145c
commit b9c17dd1f0
2 changed files with 9 additions and 1 deletions
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7
src/core/tcp_in.c
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@@ -448,13 +448,18 @@ tcp_listen_input(struct tcp_pcb_listen *pcb)
struct tcp_pcb *npcb;
err_t rc;
if (flags & TCP_RST) {
/* An incoming RST should be ignored. Return. */
return ERR_OK;
}
/* In the LISTEN state, we check for incoming SYN segments,
creates a new PCB, and responds with a SYN|ACK. */
if (flags & TCP_ACK) {
/* For incoming segments with the ACK flag set, respond with a
RST. */
LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_listen_input: ACK in LISTEN, sending reset\n"));
tcp_rst(ackno + 1, seqno + tcplen, ipX_current_dest_addr(),
tcp_rst(ackno, seqno + tcplen, ipX_current_dest_addr(),
ipX_current_src_addr(), tcphdr->dest, tcphdr->src, ip_current_is_v6());
} else if (flags & TCP_SYN) {
LWIP_DEBUGF(TCP_DEBUG, ("TCP connection request %"U16_F" -> %"U16_F".\n", tcphdr->src, tcphdr->dest));