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author | https://www.google.com/accounts/o8/id?id=AItOawkzwmw_zyMpZC9_J7ey--woeYPoZkAOgGw <dxtrish@web> | 2014-02-08 19:16:24 +0000 |
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committer | admin <admin@branchable.com> | 2014-02-08 19:16:24 +0000 |
commit | ac0210727d5026c1501e3c12cb2b9458c9f87349 (patch) | |
tree | b9aeaec102076d905a7debbffa46a27f0531d3f4 | |
parent | fe2e46beba6edce5287265037b4b9a1c3024bb8d (diff) |
Added a comment
-rw-r--r-- | doc/bugs/More_build_oddities_under_OpenBSD/comment_11_e2c19aca7877cec7b956dae104ebc394._comment | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/doc/bugs/More_build_oddities_under_OpenBSD/comment_11_e2c19aca7877cec7b956dae104ebc394._comment b/doc/bugs/More_build_oddities_under_OpenBSD/comment_11_e2c19aca7877cec7b956dae104ebc394._comment new file mode 100644 index 000000000..b0b68fa4d --- /dev/null +++ b/doc/bugs/More_build_oddities_under_OpenBSD/comment_11_e2c19aca7877cec7b956dae104ebc394._comment @@ -0,0 +1,95 @@ +[[!comment format=mdwn + username="https://www.google.com/accounts/o8/id?id=AItOawkzwmw_zyMpZC9_J7ey--woeYPoZkAOgGw" + nickname="dxtrish" + subject="comment 11" + date="2014-02-08T19:16:24Z" + content=""" +I honestly have no idea why that move works because + + % ls -lh /usr/lib|grep -E '(gsasl|xml2|gnutls|idn)' + +returns nothing. But couldn't those symbols already be in the other libraries considering, from what I've read at least, haskell stuff are statically compiled by default? + +Anyway, you are completely right that this happened when I try to use XMPP. The reason I was looking in the wrong place to begin with was because the webapp spit out the error messsage. I have redirected my attention to the network library and the xmpp library. + +But I might have found something interesting in the network library. Keep in mind that I just learned a little today, so do correct me if I'm wrong. + +Looking at http://hackage.haskell.org/package/network-2.2.1.8/docs/src/Network-Socket.html I found: + setSocketOption :: Socket + -> SocketOption -- Option Name + -> Int -- Option Value + -> IO () + setSocketOption (MkSocket s _ _ _ _) so v = do + with (fromIntegral v) $ \ptr_v -> do + throwErrnoIfMinus1_ \"setSocketOption\" $ + c_setsockopt s (socketOptLevel so) (packSocketOption so) ptr_v + (fromIntegral (sizeOf v)) + return () + +Everything here looks good. So I decided to take a look at SocketOption, socketOptLevel and packSocketOption. + data SocketOption + = DummySocketOption__ + | Debug {- SO_DEBUG -} + | ReuseAddr {- SO_REUSEADDR -} + | Type {- SO_TYPE -} + | SoError {- SO_ERROR -} + | DontRoute {- SO_DONTROUTE -} + | Broadcast {- SO_BROADCAST -} + | SendBuffer {- SO_SNDBUF -} + | RecvBuffer {- SO_RCVBUF -} + | KeepAlive {- SO_KEEPALIVE -} + | OOBInline {- SO_OOBINLINE -} + | TimeToLive {- IP_TTL -} + | MaxSegment {- TCP_MAXSEG -} + | NoDelay {- TCP_NODELAY -} + | Linger {- SO_LINGER -} + | RecvLowWater {- SO_RCVLOWAT -} + | SendLowWater {- SO_SNDLOWAT -} + | RecvTimeOut {- SO_RCVTIMEO -} + | SendTimeOut {- SO_SNDTIMEO -} + + socketOptLevel :: SocketOption -> CInt + socketOptLevel so = + case so of + TimeToLive -> 0 + MaxSegment -> 6 + NoDelay -> 6 + _ -> 1 + + packSocketOption :: SocketOption -> CInt + packSocketOption so = + case so of + Debug -> 1 + ReuseAddr -> 2 + Type -> 3 + SoError -> 4 + DontRoute -> 5 + Broadcast -> 6 + SendBuffer -> 7 + RecvBuffer -> 8 + KeepAlive -> 9 + OOBInline -> 10 + TimeToLive -> 2 + MaxSegment -> 2 + NoDelay -> 1 + Linger -> 13 + RecvLowWater -> 18 + SendLowWater -> 19 + RecvTimeOut -> 20 + SendTimeOut -> 21 + +Everything looks good so I thought long and hard about this. Then, by chance, I just looked at the man page for setsockopt() and it mentioned SOL_SOCKET and I was like \"Hmm...\" + + % grep -R SOL_SOCKET /usr/include + /usr/include/openssl/e_os.h:#define ioctlsocket(a,b,c) setsockopt((a),SOL_SOCKET,(b),(c),sizeof(*(c))) + /usr/include/sys/socket.h:#define SOL_SOCKET 0xffff /* options for socket level */ + /usr/include/sys/socket.h:/* Read using getsockopt() with SOL_SOCKET, SO_PEERCRED */ + +Wat? + + #define SOL_SOCKET 0xffff + +Going back to the Haskell code above I realized that SetSocketOption will NEVER feed 0xffff as level to setsockopt() because socketOptLevel returns 1 unless optname is TimeToLive, MaxSegment or NoDelay. + +Am I way off? +"""]] |