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more meaningful debug messages

This commit is contained in:
Christian Ulrich 2020-09-25 17:19:34 +02:00
parent 9b2e72d7dc
commit 56bfb253e5
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GPG Key ID: 8241BE099775A097
1 changed files with 2 additions and 2 deletions
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4
tcp_syni.nim
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@ -56,9 +56,7 @@ proc injectTcpPacket(rawFd: AsyncFD, ipPacket: IpPacket) {.async.} =
toSockAddr(ipPacket.ipAddrDst, ipPacket.tcpPortDst, sockaddr, sockaddrLen)
await rawFd.sendTo(packet.cstring, packet.len,
cast[ptr SockAddr](addr sockaddr), sockaddrLen)
echo &"injected {ipPacket.ipAddrSrc}:{ipPacket.tcpPortSrc.int} -> {ipPacket.ipAddrDst}:{ipPacket.tcpPortDst.int} (seq {ipPacket.tcpSeqNumber})"
except OSError as e:
echo &"cannot inject {ipPacket.ipAddrSrc}:{ipPacket.tcpPortSrc.int} -> {ipPacket.ipAddrDst}:{ipPacket.tcpPortDst.int} (seq {ipPacket.tcpSeqNumber}): ", e.msg
raise newException(PunchHoleError, e.msg)
proc captureSeqNumbers(puncher: TcpSyniPuncher, rawFd: AsyncFD,
@ -96,6 +94,7 @@ proc captureAndResendAck(puncher: TcpSyniPuncher, captureFd: AsyncFD,
for port in puncher.dstPorts:
if parsed.tcpPortDst.int == port.int:
parsed.ipTTL = 64
echo &"[{parsed.ipAddrSrc}:{parsed.tcpPortSrc.int} -> {parsed.ipAddrDst}:{parsed.tcpPortDst}, SEQ {parsed.tcpSeqNumber}] resending ACK with TTL {parsed.ipTTL}"
await injectFd.injectTcpPacket(parsed)
return
@ -201,6 +200,7 @@ proc accept*(puncher: TcpSyniPuncher): Future[AsyncSocket] {.async.} =
tcpAckNumber: 0,
tcpFlags: {SYN},
tcpWindowSize: 1452 * 10)
echo &"[{ipPacket.ipAddrSrc}:{ipPacket.tcpPortSrc} -> {ipPacket.ipAddrDst}:{ipPacket.tcpPortDst}, SEQ {ipPacket.tcpSeqNumber}] injecting SYN"
asyncCheck rawFd.injectTcpPacket(ipPacket)
let sock = newAsyncSocket()
sock.setSockOpt(OptReuseAddr, true)