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author | Aleksander Morgado <aleksander@aleksander.es> | 2017-06-21 21:13:10 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2017-06-23 13:34:07 +0200 |
commit | bdafe8150dddcde945170dfdb268542a128ea038 (patch) | |
tree | 28a77a99cb42023d3813b1905f003133be6db5ce /lib | |
parent | 95ec61ecb0bd1aad69b7f387768369c09ff532b4 (diff) | |
download | barebox-bdafe8150dddcde945170dfdb268542a128ea038.tar.gz barebox-bdafe8150dddcde945170dfdb268542a128ea038.tar.xz |
ratp: send missing RST in behavior C2
The reference says:
If SYN was set we assume that the other end crashed and has
attempted to open a new connection. We respond by sending a
legal reset:
<SN=received AN><AN=received SN+1 modulo 2><CTL=RST, ACK>
Add this missing step.
This issue affects the barebox<->bbremote interaction if bbremote
crashes without closing the channel and restarts opening a complete
new connection.
Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/ratp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/ratp.c b/lib/ratp.c index e9536499e2..a8ac52c75f 100644 --- a/lib/ratp.c +++ b/lib/ratp.c @@ -731,8 +731,15 @@ static int ratp_behaviour_c2(struct ratp_internal *ri, void *pkt) return 1; if (hdr->control & RATP_CONTROL_SYN) { + uint8_t control; + ri->status = -ECONNRESET; pr_debug("Error: Connection reset\n"); + + control = RATP_CONTROL_RST | RATP_CONTROL_ACK | + ratp_set_sn(ratp_an(hdr)) | ratp_set_an(!ratp_sn(hdr)); + ratp_send_hdr(ri, control); + ratp_state_change(ri, RATP_STATE_CLOSED); return 1; } |