intermittent socket failures

```
What steps will reproduce the problem?
1. w/ latest IMSDroid code, I toggle registration off & on
2. intermittently I get socket errors, see debug trace below

What is the expected output?

No socket errors

What do you see instead?

Just toggling registration, no changes in cellular or WLAN data coverage (WiFi,
3G or HSPA+). The problem can occur both on WiFi or cellular data. Then
inexplicably register/deregister will start working again.

What version of the product are you using? On what operating system?

Latest version IMSDroid, latest version of Doubango compiled with NEON=yes (I
am using my own build of Doubango stack, will go back and try the public
version checked into SVN)

Please provide any additional information below.

Here are 2 traces, I am happy to provide my tinyWrap.so build, if that would
help isolate. It seems like the network connectivity state is related.

01-25 12:01:18.676: ERROR/tinyWRAP(5327): ***ERROR: function:
"tnet_get_ip_n_port()"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): file: "src/tnet_utils.c"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): line: "920"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): MSG: TNET_GET_SOCKADDR has failed
with status code: -1
01-25 12:01:18.676: ERROR/tinyWRAP(5327): ***ERROR: function:
"tnet_transport_sendto()"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): file: "src/tnet_transport_poll.c"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): line: "241"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): MSG: sendto have failed.
01-25 12:01:18.676: ERROR/tinyWRAP(5327): ***ERROR: function:
"tnet_transport_sendto()"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): file: "src/tnet_transport_poll.c"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): line: "241"
01-25 12:01:18.676: ERROR/tinyWRAP(5327): MSG: (SYSTEM)NETWORK ERROR ==>Socket
operation on non-socket
01-25 12:01:18.725: ERROR/tinyWRAP(5327): ***ERROR: function:
"tnet_get_ip_n_port()"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): file: "src/tnet_utils.c"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): line: "920"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): MSG: TNET_GET_SOCKADDR has failed
with status code: -1
01-25 12:01:18.725: ERROR/tinyWRAP(5327): ***ERROR: function:
"tnet_transport_sendto()"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): file: "src/tnet_transport_poll.c"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): line: "241"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): MSG: sendto have failed.
01-25 12:01:18.725: ERROR/tinyWRAP(5327): ***ERROR: function:
"tnet_transport_sendto()"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): file: "src/tnet_transport_poll.c"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): line: "241"
01-25 12:01:18.725: ERROR/tinyWRAP(5327): MSG: (SYSTEM)NETWORK ERROR ==>Socket
operation on non-socket

I did add some more trace to get the value of socket file descriptor. Here is
what the trace outputs now:

02-04 02:09:01.478: ERROR/tinyWRAP(3084): ***ERROR: function:
"tnet_get_ip_n_port()"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): file: "src/tnet_utils.c"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): line: "924"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): MSG: TNET_GET_SOCKADDR has failed
with status code: -1, fd = 45
02-04 02:09:01.478: ERROR/tinyWRAP(3084): ***ERROR: function:
"tnet_transport_sendto()"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): file: "src/tnet_transport_poll.c"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): line: "241"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): MSG: sendto have failed.
02-04 02:09:01.478: ERROR/tinyWRAP(3084): ***ERROR: function:
"tnet_transport_sendto()"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): file: "src/tnet_transport_poll.c"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): line: "241"
02-04 02:09:01.478: ERROR/tinyWRAP(3084): MSG: (SYSTEM)NETWORK ERROR ==>Bad
file number
02-04 02:09:01.521: ERROR/tinyWRAP(3084): ***ERROR: function:
"tnet_get_ip_n_port()"
02-04 02:09:01.521: ERROR/tinyWRAP(3084): file: "src/tnet_utils.c"
02-04 02:09:01.521: ERROR/tinyWRAP(3084): line: "924"
02-04 02:09:01.521: ERROR/tinyWRAP(3084): MSG: TNET_GET_SOCKADDR has failed
with status code: -1, fd = 45
02-04 02:09:01.521: ERROR/tinyWRAP(3084): ***ERROR: function:
"tnet_transport_sendto()"
02-04 02:09:01.521: ERROR/tinyWRAP(3084): file: "src/tnet_transport_poll.c"
02-04 02:09:01.521: ERROR/tinyWRAP(3084): line: "241"
02-04 02:09:01.521: ERROR/tinyWRAP(3084): MSG: sendto have failed.
02-04 02:09:01.523: ERROR/tinyWRAP(3084): ***ERROR: function:
"tnet_transport_sendto()"
02-04 02:09:01.523: ERROR/tinyWRAP(3084): file: "src/tnet_transport_poll.c"
02-04 02:09:01.523: ERROR/tinyWRAP(3084): line: "241"
02-04 02:09:01.523: ERROR/tinyWRAP(3084): MSG: (SYSTEM)NETWORK ERROR ==>Bad
file number

```

Original issue reported on code.google.com by `rich.ho...@gmail.com` on 4 Feb 2011 at 7:27