/*
  The MIT License

  Copyright (c) 2010-2013 IsmAvatar <IsmAvatar@gmail.com> and Robert B. Colton

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
*/

This is a list of all error codes you may encounter.
http://epydoc.sourceforge.net/stdlib/errno-module.html

2     ENOENT (connect)
4     EINTR
5     EIO
9     EBADF
11    EAGAIN EWOULDBLOCK
12    ENOMEM (send)
13    EACCES (recv)
14    EFAULT
20    ENOTDIR (connect)
21    EISDIR
22    EINVAL (send)
23    ENFILE (socket)
24    EMFILE (socket)
30    EROFS
32    EPIPE (recv)
36    ENAMETOOLONG
40    ELOOP (connect)
63    ENOSR
71    EPROTO (accept)
88    ENOTSOCK
89    EDESTADDRREQ (send)
90    EMSGSIZE (recv)
91    EPROTOTYPE (connect)
93    EPROTONOSUPPORT (socket)
95    EOPNOTSUPP
97    EAFNOSUPPORT (connect)
98    EADDRINUSE (connect)
99    EADDRNOTAVAIL (connect)
100   ENETDOWN (recv)
101   ENETUNREACH (recv)
103   ECONNABORTED
104   ECONNRESET
105   ENOBUFS
106   EISCONN (connect)
107   ENOTCONN
110   ETIMEDOUT (send)
111   ECONNREFUSED
113   EHOSTUNREACH (connect)
114   EALREADY (connect)
115   EINPROGRESS (connect)


13    EACCES (recv)
98    EADDRINUSE (connect)
99    EADDRNOTAVAIL (connect)
97    EAFNOSUPPORT (connect, socket)
11    EAGAIN EWOULDBLOCK
114   EALREADY (connect)
9     EBADF
103   ECONNABORTED
111   ECONNREFUSED
104   ECONNRESET
89    EDESTADDRREQ (send)
14    EFAULT
113   EHOSTUNREACH (connect)
115   EINPROGRESS (connect)
4     EINTR
22    EINVAL
5     EIO
106   EISCONN (connect)
21    EISDIR
40    ELOOP (connect)
24    EMFILE (socket)
90    EMSGSIZE (recv)
36    ENAMETOOLONG
100   ENETDOWN (recv)
101   ENETUNREACH (recv)
23    ENFILE (socket)
105   ENOBUFS
2     ENOENT (connect)
12    ENOMEM
63    ENOSR
107   ENOTCONN
20    ENOTDIR (connect)
88    ENOTSOCK
95    EOPNOTSUPP
32    EPIPE (recv)
71    EPROTO (accept)
93    EPROTONOSUPPORT (socket)
91    EPROTOTYPE (connect)
30    EROFS
110   ETIMEDOUT