Improve the state machine.

diff --git a/demos/state_machine/state_machine.c b/demos/state_machine/state_machine.c
index 9cede29350631deff1f4dd4c05725b6810489ff6..fef3f3e3d1fced897d5448399ac69daf7eb8dec5 100644 (file)
--- a/demos/state_machine/state_machine.c
+++ b/demos/state_machine/state_machine.c
@@ -191,6 +191,9 @@ int SSLStateMachine_read_extract(SSLStateMachine *pMachine,
            fprintf(stderr,"SSL_read wants more data\n");
            return 0;
            }
+
+       SSLStateMachine_print_error(pMachine,"SSL_read error");
+       exit(8);
        }
 
     fprintf(stderr,"%d bytes of decrypted data read from state machine\n",n);
@@ -289,6 +292,8 @@ int main(int argc,char **argv)
     int nFD;
     const char *szCertificateFile;
     const char *szKeyFile;
+    char rbuf[1];
+    int nrbuf=0;
 
     if(argc != 4)
        {
@@ -321,6 +326,14 @@ int main(int argc,char **argv)
        /* Select socket for input */
        FD_SET(nFD,&rfds);
 
+       /* check whether there's decrypted data */
+       if(!nrbuf)
+           nrbuf=SSLStateMachine_read_extract(pMachine,rbuf,1);
+
+       /* if there's decrypted data, check whether we can write it */
+       if(nrbuf)
+           FD_SET(1,&wfds);
+
        /* Select socket for output */
        if(SSLStateMachine_write_can_extract(pMachine))
            FD_SET(nFD,&wfds);
@@ -346,21 +359,29 @@ int main(int argc,char **argv)
            SSLStateMachine_read_inject(pMachine,buf,n);
            }
 
-       /* FIXME: we should only extract if stdout is ready */
-       n=SSLStateMachine_read_extract(pMachine,buf,sizeof buf);
-       if(n < 0)
+       /* stdout is ready for output (and hence we have some to send it) */
+       if(FD_ISSET(1,&wfds))
            {
-           SSLStateMachine_print_error(pMachine,"read extract failed");
-           break;
-           }
-       assert(n >= 0);
-       if(n > 0)
-           {
-           int w;
+           assert(nrbuf == 1);
+           buf[0]=rbuf[0];
+           nrbuf=0;
 
-           w=write(1,buf,n);
-           /* FIXME: we should push back any unwritten data */
-           assert(w == n);
+           n=SSLStateMachine_read_extract(pMachine,buf+1,sizeof buf-1);
+           if(n < 0)
+               {
+               SSLStateMachine_print_error(pMachine,"read extract failed");
+               break;
+               }
+           assert(n >= 0);
+           ++n;
+           if(n > 0) /* FIXME: has to be true now */
+               {
+               int w;
+               
+               w=write(1,buf,n);
+               /* FIXME: we should push back any unwritten data */
+               assert(w == n);
+               }
            }
 
        /* Socket is ready for output (and therefore we have output to send) */