Great! If there is a wiki or FAQ page for networking with Haskell it might be worth updating. -deech
On 6/4/10, Roman Cheplyaka <r...@ro-che.info> wrote: > /etc/hosts is the file responsible for resolving 'localhost' hostname. > As you can see from it, there are two entries for localhost: one > contains IPv4 address (127.0.0.1) and another contains IPv6 address > (::1). > > The behaviour you observe is kinda bug in connectTo function. Instead of > trying all of the addresses, this function just tries the first one. > Until it is fixed (I'm gonna write and send a patch soon), can you live > with this temporary hack? If for some reason the answer is "no", you > have to use low-level functions from Network.Socket module for now. > > > * aditya siram <aditya.si...@gmail.com> [2010-06-04 14:15:47-0500] >> Doing (1) solves my problem. What did I do and why did it work? Thanks >> a lot for your help! >> -deech >> >> On 6/4/10, Roman Cheplyaka <r...@ro-che.info> wrote: >> > Confirm if any of the following solves the problem: >> > >> > 1. commenting out (by prepending putting hash sign '#' in the beginning >> > of the line) the following line in /etc/hosts: >> > >> > ::1 localhost ip6-localhost ip6-loopback >> > >> > 2. executing as root the following command: >> > >> > rmmod ipv6 >> > >> > * aditya siram <aditya.si...@gmail.com> [2010-06-04 13:51:29-0500] >> >> Here's my GHCI session (with my network card off): >> >> Prelude Network Network.Socket> connectTo "localhost" (PortNumber 3000) >> >> *** Exception: connect: does not exist (Connection refused) >> >> Prelude Network Network.Socket> connectTo "127.0.0.1" (PortNumber 3000) >> >> {handle: <socket: 7>} >> >> >> >> The OS is Ubuntu (Lucid) Linux. The contents of "/etc/hosts" and >> >> "/etc/nsswitch.conf" are: >> >> >> >> > cat /etc/nsswitch.conf >> >> # /etc/nsswitch.conf >> >> # >> >> # Example configuration of GNU Name Service Switch functionality. >> >> # If you have the `glibc-doc-reference' and `info' packages installed, >> >> try: >> >> # `info libc "Name Service Switch"' for information about this file. >> >> >> >> passwd: compat >> >> group: compat >> >> shadow: compat >> >> >> >> hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 >> >> networks: files >> >> >> >> protocols: db files >> >> services: db files >> >> ethers: db files >> >> rpc: db files >> >> >> >> netgroup: nis >> >> >> >> > cat /etc/hosts >> >> 127.0.0.1 localhost >> >> 127.0.1.1 deech-mac-ubuntu >> >> >> >> # The following lines are desirable for IPv6 capable hosts >> >> ::1 localhost ip6-localhost ip6-loopback >> >> fe00::0 ip6-localnet >> >> ff00::0 ip6-mcastprefix >> >> ff02::1 ip6-allnodes >> >> ff02::2 ip6-allrouters >> >> ff02::3 ip6-allhosts >> >> >> >> >> >> -deech >> >> >> >> On 6/4/10, Roman Cheplyaka <r...@ro-che.info> wrote: >> >> > * aditya siram <aditya.si...@gmail.com> [2010-06-03 22:30:33-0500] >> >> >> Hi all, >> >> >> I had an issue where using the connectTo [1] function would fail to >> >> >> connect to "localhost" if my wireless card was turned off. The >> >> >> moment >> >> >> I turned on my wireless connection it worked. But if I use connectTo >> >> >> with "127.0.0.1" [2] with my network off it works. >> >> >> >> >> >> I confirmed that "localhost' resolves to "127.0.0.1" by pinging >> >> >> "localhost" from command line with the Internet off. >> >> >> >> >> >> Is this a bug in "connectTo"? >> >> >> >> >> >> -deech >> >> >> >> >> >> [1] connectTo "localhost" (PortNumber some_number) >> >> >> [2] connectTo "127.0.0.1" (PortNumber some_number) >> >> > >> >> > How exactly did it fail? Did it throw an exception? If so, what was >> >> > the >> >> > exception? >> >> > >> >> > Which operating system did you observe that under? >> >> > >> >> > If that was Linux, can you show the contents of the following files >> >> > on >> >> > that system: >> >> > >> >> > /etc/nsswitch.conf >> >> > /etc/hosts >> >> > >> >> > -- >> >> > Roman I. Cheplyaka :: http://ro-che.info/ >> >> > "Don't let school get in the way of your education." - Mark Twain >> >> > _______________________________________________ >> >> > Haskell-Cafe mailing list >> >> > Haskell-Cafe@haskell.org >> >> > http://www.haskell.org/mailman/listinfo/haskell-cafe >> >> > >> > >> > -- >> > Roman I. Cheplyaka :: http://ro-che.info/ >> > "Don't let school get in the way of your education." - Mark Twain >> > > > -- > Roman I. Cheplyaka :: http://ro-che.info/ > "Don't let school get in the way of your education." - Mark Twain > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe