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net: tcp: Always set ACK bit in RST packet

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Set the ACK bit in every RST packet as that seems to be expected
by Linux for example.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2017-05-12 14:30:20 +03:00
commit c6fcda19a3
1 changed files with 4 additions and 11 deletions
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15
subsys/net/ip/tcp.c
View file

@ -567,17 +567,10 @@ int net_tcp_prepare_reset(struct net_tcp *tcp,
if ((net_context_get_state(tcp->context) != NET_CONTEXT_UNCONNECTED) &&
(net_tcp_get_state(tcp) != NET_TCP_SYN_SENT) &&
(net_tcp_get_state(tcp) != NET_TCP_TIME_WAIT)) {
if (net_tcp_get_state(tcp) == NET_TCP_SYN_RCVD) {
/* Send the reset segment with acknowledgment. */
segment.ack = tcp->send_ack;
segment.flags = NET_TCP_RST | NET_TCP_ACK;
} else {
/* Send the reset segment without acknowledgment. */
segment.ack = 0;
segment.flags = NET_TCP_RST;
}
segment.seq = 0;
/* Send the reset segment always with acknowledgment. */
segment.ack = tcp->send_ack;
segment.flags = NET_TCP_RST | NET_TCP_ACK;
segment.seq = tcp->send_seq;
segment.src_addr = &tcp->context->local;
segment.dst_addr = remote;
segment.wnd = 0;