Hello,

I have a query related to sockets.
I have created a socket between the tasks (T1 & T2) running on the
same board and my creation code from T1 is follows.

mbxSock = socket(AF_INET, SOCK_STREAM,0)
int reuse = 1;
setsockopt(mbxSock, SOL_SOCKET, SO_REUSEADDR, (char *) &reuse,
sizeof(int));
int flag = 1;
setsockopt(mbxSock, IPPROTO_TCP, TCP_NODELAY, (char *) &flag,
sizeof(int));
int bufferSize = 16384;
setsockopt(mbxSock,SOL_SOCKET,SO_SNDBUF,(char
*)&bufferSize,sizeof(int));

My task T2 listens to this internal socket from T1 and some other
external sockets also from different boards(using select call). When
my application is runnning, Task T1 is pending on a semaphore when it
was trying to send a message to this socket. Here is the callstack of
task T1

0x00ccfb4c -> send + 0x4c
0x00c7b008 -> bsdSend + 0xd0
0x00ce2b58 -> sosend + 0x2a4
0x00c77db4 -> sbwait + 0x2c
0x00c78b70 -> ksleep + 0x68
0x00cb8904 -> semTake + 0x140
0x00cb7d7c -> semBTake + 0x190

I thought other task T2 is not reading the messages from the socket
and that is the reason task T1 is not able to send message and
waiting. But if I observe the task T2 call stack, the last call is a
select call (Does it mean no messages are available in any of it's
sockets (internal + external)).

Can some body please tell me what is happening in the above
callstack and why task T1 is waiting for a semaphore and when the
above sequence of calls can come.

Thanks,
Nari.