ios - SmallSocket causing app to crash on iPhone -


i trying use smallsockets library create tcp socket connection. currently, i'm using button test connection server iphone. here code looks like:

-(ibaction)btnconnect:(id)sender {     bool loopconnection = true;     while(loopconnection == true)     {         socket *socket;         int port = 11005;         nsstring *host = @"199.5.83.63";          socket = [socket socket];          @try         {             nsmutabledata *data;             [socket connecttohostname:host port:port];             [socket readdata:data];             //  [socket writestring:@"hello world!"];              //** connection successful **//             [socket retain]; // must retain if want use out of action block.         }         @catch (nsexception* exception)          {             nsstring *errmsg = [nsstring stringwithformat:@"%@",[exception reason]];             nslog(errmsg);             socket = nil;         }     } }

when press button, app freezes. freezes on following function (which part of smallsockets library):

- (int)readdata:(nsmutabledata*)data // // append available data socket supplied buffer. // returns number of bytes received.  (may 0) // {     ssize_t count;      // data must not null ptr      if ( data == null )     [nsexception raise:socket_ex_invalid_buffer                      format:socket_ex_invalid_buffer];      // socket must created , connected      if ( socketfd == socket_invalid_descriptor )         [nsexception raise:socket_ex_bad_socket_descriptor                      format:socket_ex_bad_socket_descriptor];      if ( !connected )         [nsexception raise:socket_ex_not_connected                      format:socket_ex_not_connected];      // request read of as can.  should return if no data.      count = recv(socketfd, readbuffer, readbuffersize, 0);      if ( count > 0 )     {         // got data, append user's buffer          [data appendbytes:readbuffer length:count];     }     else if ( count == 0 )     {         // other side has disconnected, close down our socket          [self close];     }     else if ( count < 0 )     {         // recv() returned error.           if ( errno == eagain )         {             // no data available read (and socket non-blocking)             count = 0;         }         else             [nsexception raise:socket_ex_recv_failed                          format:socket_ex_recv_failed_f, strerror(errno)];     }      return count; }

the app freezes on line: [data appendbytes:readbuffer length:count]; , says on same line: thread 1:exc_bad_access (code=1, address=0x5d18c48b). see in output (lldb) in green letters. client connects, server sends 4 byte packet client.

if shed light why app crashing here, i'd appreciate it. i've been banging head couple hours trying figure out issue is.

thanks!

i don't know if right answer or not, first thing retain socket right away. if have problem socket, release in exception handler.


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