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#537 close sessions on receiving an ESTABLISH packet to allow for retries

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This commit is contained in:
Mikayla Fischler
2024-08-24 14:46:58 -04:00
parent 0ab2d57b66
commit b3be2d4bfc
14 changed files with 134 additions and 112 deletions
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6
supervisor/session/rtu.lua
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@@ -242,7 +242,7 @@ function rtu.new_session(id, s_addr, i_seq_num, in_queue, out_queue, timeout, ad
local function _handle_packet(pkt)
-- check sequence number
if self.r_seq_num ~= pkt.scada_frame.seq_num() then
log.warning(log_tag .. "sequence out-of-order: last = " .. self.r_seq_num .. ", new = " .. pkt.scada_frame.seq_num())
log.warning(log_tag .. "sequence out-of-order: next = " .. self.r_seq_num .. ", new = " .. pkt.scada_frame.seq_num())
return
else
self.r_seq_num = pkt.scada_frame.seq_num() + 1
@@ -283,6 +283,10 @@ function rtu.new_session(id, s_addr, i_seq_num, in_queue, out_queue, timeout, ad
elseif pkt.type == MGMT_TYPE.CLOSE then
-- close the session
_close()
elseif pkt.type == MGMT_TYPE.ESTABLISH then
-- something is wrong, kill the session
_close()
log.warning(log_tag .. "terminated session due to an unexpected ESTABLISH packet")
elseif pkt.type == MGMT_TYPE.RTU_ADVERT then
-- RTU advertisement
log.debug(log_tag .. "received updated advertisement")