1 // vim: noet sw=4 ts=4:
3 ==================================================================================
4 Copyright (c) 2020 Nokia
5 Copyright (c) 2020 AT&T Intellectual Property.
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
11 http://www.apache.org/licenses/LICENSE-2.0
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
17 limitations under the License.
18 ==================================================================================
22 **************************************************************************
24 * Abstract: This routine will poll the sockets that are open for
25 * an event and return after the delay period has expired, or
26 * an event has been processed.
27 * Parms: gptr - Pointer to the global information block
28 * msdelay- 100ths of seconds to delay
29 * Returns: SI_OK if the caller can continue, SI_ERROR if all sessions have been
30 * stopped, or the interface cannot proceed. When SI_ERROR is
31 * returned the caller should cleanup and exit immediatly (we
32 * have probably received a sigter or sigquit.
34 * Author: E. Scott Daniels
36 **************************************************************************
38 #include "sisetup.h" // get the setup stuff
39 #include "sitransport.h"
43 extern int SIpoll( struct ginfo_blk *gptr, int msdelay )
45 //extern int deaths; // number of children that died and are zombies
46 //extern int sigflags; // flags set by the signal handler routine
48 int fd; // file descriptor for use in this routine
49 int ((*cbptr)()); // pointer to callback routine to call
50 int status = SI_OK; // return status
51 int addrlen; // length of address from recvfrom call
52 char *buf; // work buffer pointer
55 struct tp_blk *tpptr; // pointer at tp stuff
56 struct tp_blk *nextone = NULL; // pointer at next block to process
57 int pstat; // poll status
58 int kstat; // keyboard status
59 struct timeval delay; // delay to use on select call
60 struct sockaddr *uaddr; // pointer to udp address
62 if( gptr->flags & GIF_SHUTDOWN ) // cannot do if we should shutdown
63 return( SI_ERROR ); // so just get out
66 if( gptr->magicnum != MAGICNUM ) // if not a valid ginfo block
69 delay.tv_sec = msdelay/100; // user submits 100ths, cvt to seconds and milliseconds
70 delay.tv_usec = (msdelay%100) * 10;
73 SIbldpoll( gptr ); // build the fdlist for poll
74 pstat = 0; // ensure good code
76 if( gptr->fdcount > 0 )
77 pstat = select( gptr->fdcount, &gptr->readfds, &gptr->writefds,
78 &gptr->execpfds, &delay );
80 if( (pstat < 0 && errno != EINTR) )
81 { // poll fail or termination signal rcvd
82 gptr->fdcount = 0; // prevent trying to look at a session
83 gptr->flags |= GIF_SHUTDOWN; // cause cleanup and exit at end
86 if( pstat > 0 && (! (gptr->flags & GIF_SHUTDOWN)) )
88 if( FD_ISSET( 0, &gptr->readfds ) ) // check for keybd input
90 fgets( ibuf, 1024, stdin ); // get the stuff from keyboard
91 if( (cbptr = gptr->cbtab[SI_CB_KDATA].cbrtn) != NULL )
93 status = (*cbptr)( gptr->cbtab[SI_CB_KDATA].cbdata, ibuf );
94 SIcbstat( gptr, status, SI_CB_KDATA ); // handle status
95 } // end if call back was defined
99 while( tpptr != NULL ) {
100 nextone = tpptr->next; // allow for a delete in loop
102 if( tpptr->squeue != NULL && (FD_ISSET( tpptr->fd, &gptr->writefds )) )
103 SIsend( gptr, tpptr ); // send if clear to send
105 if( FD_ISSET( tpptr->fd, &gptr->execpfds ) )
107 ; // sunos seems to set except for unknown reasons; ignore
110 if( FD_ISSET( tpptr->fd, &gptr->readfds ) ) // read event pending?
112 fd = tpptr->fd; // quick ref to the fd
114 if( tpptr->flags & TPF_LISTENFD ) // listen port setup by init?
115 { // yes-assume new session req
116 status = SInewsession( gptr, tpptr ); // make new session
118 else // data received on a regular port
119 if( tpptr->type == SOCK_DGRAM ) // udp socket?
121 uaddr = (struct sockaddr *) malloc( sizeof( struct sockaddr ) );
122 status = RECVFROM( fd, gptr->rbuf, MAX_RBUF, 0, uaddr, &addrlen );
123 if( status >= 0 && ! (tpptr->flags & TPF_DRAIN) )
124 { // if good status call cb routine
125 if( (cbptr = gptr->cbtab[SI_CB_RDATA].cbrtn) != NULL )
127 SIaddress( uaddr, (void **) &buf, AC_TODOT );
128 status = (*cbptr)( gptr->cbtab[SI_CB_RDATA].cbdata, gptr->rbuf, status, buf );
129 SIcbstat( gptr, status, SI_CB_RDATA ); // handle status
131 } // end if call back was defined
132 } // end if status was ok
136 { // else receive on tcp session
137 status = RECV( fd, gptr->rbuf, MAX_RBUF, 0 ); // read data
139 if( status > SI_OK && ! (tpptr->flags & TPF_DRAIN) )
141 if( (cbptr = gptr->cbtab[SI_CB_CDATA].cbrtn) != NULL )
143 status = (*cbptr)( gptr->cbtab[SI_CB_CDATA].cbdata, fd, gptr->rbuf, status );
144 SIcbstat( gptr, status, SI_CB_CDATA ); // handle cb status
145 } // end if call back was defined
146 } // end if status was ok
147 else // sunos seems to send 0 bytes as indication of disc
149 if( (cbptr = gptr->cbtab[SI_CB_DISC].cbrtn) != NULL )
151 status = (*cbptr)( gptr->cbtab[SI_CB_DISC].cbdata, tpptr->fd );
152 SIcbstat( gptr, status, SI_CB_DISC ); // handle status
154 SIterm( gptr, tpptr );
157 } // end if event on this fd
160 } // end for each fd in the list
161 } // end if not in shutdown
164 if( gptr->flags & GIF_SHUTDOWN ) // we need to stop for some reason
166 status = SI_ERROR; // status should indicate to user to die
167 SIshutdown( gptr ); // clean things up
170 status = SI_OK; // user can continue to process
172 return( status ); // send status back to caller