2 * ===================================
3 * HARP | Host ATM Research Platform
4 * ===================================
7 * This Host ATM Research Platform ("HARP") file (the "Software") is
8 * made available by Network Computing Services, Inc. ("NetworkCS")
9 * "AS IS". NetworkCS does not provide maintenance, improvements or
10 * support of any kind.
12 * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
13 * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
14 * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
15 * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
16 * In no event shall NetworkCS be responsible for any damages, including
17 * but not limited to consequential damages, arising from or relating to
18 * any use of the Software or related support.
20 * Copyright 1994-1998 Network Computing Services, Inc.
22 * Copies of this Software may be made, however, the above copyright
23 * notice must be reproduced on all copies.
30 * ATM AAL5 socket protocol processing
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
38 #include <sys/protosw.h>
39 #include <sys/signalvar.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
44 #include <sys/systm.h>
46 #include <netatm/port.h>
47 #include <netatm/queue.h>
48 #include <netatm/atm.h>
49 #include <netatm/atm_sys.h>
50 #include <netatm/atm_sap.h>
51 #include <netatm/atm_cm.h>
52 #include <netatm/atm_if.h>
53 #include <netatm/atm_stack.h>
54 #include <netatm/atm_pcb.h>
55 #include <netatm/atm_var.h>
61 u_long atm_aal5_sendspace = 64 * 1024; /* XXX */
62 u_long atm_aal5_recvspace = 64 * 1024; /* XXX */
68 static int atm_aal5_attach(struct socket *, int, struct thread *td);
69 static int atm_aal5_detach(struct socket *);
70 static int atm_aal5_bind(struct socket *, struct sockaddr *,
72 static int atm_aal5_listen(struct socket *, int backlog,
74 static int atm_aal5_connect(struct socket *, struct sockaddr *,
76 static int atm_aal5_accept(struct socket *, struct sockaddr **);
77 static int atm_aal5_disconnect(struct socket *);
78 static int atm_aal5_shutdown(struct socket *);
79 static int atm_aal5_send(struct socket *, int, KBuffer *,
80 struct sockaddr *, KBuffer *, struct thread *td);
81 static int atm_aal5_abort(struct socket *);
82 static int atm_aal5_control(struct socket *, u_long, caddr_t,
83 struct ifnet *, struct thread *td);
84 static int atm_aal5_sense(struct socket *, struct stat *);
85 static int atm_aal5_sockaddr(struct socket *, struct sockaddr **);
86 static int atm_aal5_peeraddr(struct socket *, struct sockaddr **);
87 static int atm_aal5_incoming(void *, Atm_connection *,
88 Atm_attributes *, void **);
89 static void atm_aal5_cpcs_data(void *, KBuffer *);
90 static caddr_t atm_aal5_getname(void *);
94 * New-style socket request routines
96 struct pr_usrreqs atm_aal5_usrreqs = {
97 .pru_abort = atm_aal5_abort,
98 .pru_accept = atm_aal5_accept,
99 .pru_attach = atm_aal5_attach,
100 .pru_bind = atm_aal5_bind,
101 .pru_connect = atm_aal5_connect,
102 .pru_control = atm_aal5_control,
103 .pru_detach = atm_aal5_detach,
104 .pru_disconnect = atm_aal5_disconnect,
105 .pru_listen = atm_aal5_listen,
106 .pru_peeraddr = atm_aal5_peeraddr,
107 .pru_send = atm_aal5_send,
108 .pru_sense = atm_aal5_sense,
109 .pru_shutdown = atm_aal5_shutdown,
110 .pru_sockaddr = atm_aal5_sockaddr,
116 static Atm_endpoint atm_aal5_endpt = {
134 static Atm_attributes atm_aal5_defattr = {
136 CMAPI_CPCS, /* api */
187 * Handy common code macros
190 #define ATM_INTRO(f) \
193 ATM_DEBUG2("aal5 socket %s (%p)\n", f, so); \
195 * Stack queue should have been drained \
197 if (atm_stackq_head != NULL) \
198 panic("atm_aal5: stack queue not empty"); \
200 #else /* !DIAGNOSTIC */
201 #define ATM_INTRO(f) \
205 #endif /* DIAGNOSTIC */
207 #define ATM_OUTRO() \
209 * Drain any deferred calls \
216 #define ATM_RETERR(errno) { \
223 * Attach protocol to socket
226 * so pointer to socket
227 * proto protocol identifier
228 * p pointer to process
231 * 0 request processed
232 * errno error processing request - reason indicated
236 atm_aal5_attach(so, proto, td)
246 * Do general attach stuff
248 err = atm_sock_attach(so, atm_aal5_sendspace, atm_aal5_recvspace);
253 * Finish up any protocol specific stuff
255 atp = sotoatmpcb(so);
256 atp->atp_type = ATPT_AAL5;
259 * Set default connection attributes
261 atp->atp_attr = atm_aal5_defattr;
262 strncpy(atp->atp_name, "(AAL5)", T_ATM_APP_NAME_LEN);
270 * Detach protocol from socket
273 * so pointer to socket
276 * 0 request processed
277 * errno error processing request - reason indicated
286 err = atm_sock_detach(so);
293 * Bind address to socket
296 * so pointer to socket
297 * addr pointer to protocol address
298 * p pointer to process
301 * 0 request processed
302 * errno error processing request - reason indicated
306 atm_aal5_bind(so, addr, td)
308 struct sockaddr *addr;
313 err = atm_sock_bind(so, addr);
320 * Listen for incoming connections
323 * so pointer to socket
324 * p pointer to process
327 * 0 request processed
328 * errno error processing request - reason indicated
332 atm_aal5_listen(so, backlog, td)
339 err = atm_sock_listen(so, &atm_aal5_endpt, backlog);
346 * Connect socket to peer
349 * so pointer to socket
350 * addr pointer to protocol address
351 * p pointer to process
354 * 0 request processed
355 * errno error processing request - reason indicated
359 atm_aal5_connect(so, addr, td)
361 struct sockaddr *addr;
366 ATM_INTRO("connect");
368 atp = sotoatmpcb(so);
371 * Resize send socket buffer to maximum sdu size
373 if (atp->atp_attr.aal.tag == T_ATM_PRESENT) {
376 size = atp->atp_attr.aal.v.aal5.forward_max_SDU_size;
377 if (size != T_ATM_ABSENT)
378 if (!sbreserve(&so->so_snd, size, so, td)) {
386 * Now get the socket connected
388 err = atm_sock_connect(so, addr, &atm_aal5_endpt);
395 * Accept pending connection
398 * so pointer to socket
399 * addr pointer to pointer to contain protocol address
402 * 0 request processed
403 * errno error processing request - reason indicated
407 atm_aal5_accept(so, addr)
409 struct sockaddr **addr;
414 * Everything is pretty much done already, we just need to
415 * return the caller's address to the user.
417 err = atm_sock_peeraddr(so, addr);
424 * Disconnect connected socket
427 * so pointer to socket
430 * 0 request processed
431 * errno error processing request - reason indicated
435 atm_aal5_disconnect(so)
438 ATM_INTRO("disconnect");
440 err = atm_sock_disconnect(so);
447 * Shut down socket data transmission
450 * so pointer to socket
453 * 0 request processed
454 * errno error processing request - reason indicated
458 atm_aal5_shutdown(so)
461 ATM_INTRO("shutdown");
473 * so pointer to socket
474 * flags send data flags
475 * m pointer to buffer containing user data
476 * addr pointer to protocol address
477 * control pointer to buffer containing protocol control data
478 * p pointer to process
481 * 0 request processed
482 * errno error processing request - reason indicated
486 atm_aal5_send(so, flags, m, addr, control, td)
490 struct sockaddr *addr;
499 * We don't support any control functions
504 clen = KB_LEN(control);
513 * We also don't support any flags or send-level addressing
521 * All we've got left is the data, so push it out
523 atp = sotoatmpcb(so);
524 err = atm_cm_cpcs_data(atp->atp_conn, m);
527 * Output problem, drop packet
529 atm_sock_stat.as_outdrop[atp->atp_type]++;
539 * Abnormally terminate service
542 * so pointer to socket
545 * 0 request processed
546 * errno error processing request - reason indicated
555 so->so_error = ECONNABORTED;
556 err = atm_sock_detach(so);
563 * Do control operation - ioctl system call
566 * so pointer to socket
568 * data pointer to code specific parameter data area
569 * ifp pointer to ifnet structure if it's an interface ioctl
570 * p pointer to process
573 * 0 request processed
574 * errno error processing request - reason indicated
578 atm_aal5_control(so, cmd, data, ifp, td)
585 ATM_INTRO("control");
597 * Sense socket status - fstat system call
600 * so pointer to socket
601 * st pointer to file status structure
604 * 0 request processed
605 * errno error processing request - reason indicated
609 atm_aal5_sense(so, st)
616 * Just return the max sdu size for the connection
618 st->st_blksize = so->so_snd.sb_hiwat;
625 * Retrieve local socket address
628 * so pointer to socket
629 * addr pointer to pointer to contain protocol address
632 * 0 request processed
633 * errno error processing request - reason indicated
637 atm_aal5_sockaddr(so, addr)
639 struct sockaddr **addr;
641 ATM_INTRO("sockaddr");
643 err = atm_sock_sockaddr(so, addr);
650 * Retrieve peer socket address
653 * so pointer to socket
654 * addr pointer to pointer to contain protocol address
657 * 0 request processed
658 * errno error processing request - reason indicated
662 atm_aal5_peeraddr(so, addr)
664 struct sockaddr **addr;
666 ATM_INTRO("peeraddr");
668 err = atm_sock_peeraddr(so, addr);
675 * Process Incoming Calls
677 * This function will receive control when an incoming call has been matched
678 * to one of our registered listen parameter blocks. Assuming the call passes
679 * acceptance criteria and all required resources are available, we will
680 * create a new protocol control block and socket association. We must
681 * then await notification of the final SVC setup results. If any
682 * problems are encountered, we will just tell the connection manager to
688 * tok owner's matched listening token
689 * cop pointer to incoming call's connection block
690 * ap pointer to incoming call's attributes
691 * tokp pointer to location to store our connection token
695 * errno call rejected - reason indicated
699 atm_aal5_incoming(tok, cop, ap, tokp)
705 Atm_pcb *atp0 = tok, *atp;
710 * Allocate a new socket and pcb for this connection.
712 * Note that our attach function will be called via sonewconn
713 * and it will allocate and setup most of the pcb.
715 atm_sock_stat.as_inconn[atp0->atp_type]++;
716 so = sonewconn(atp0->atp_socket, 0);
720 * Finish pcb setup and pass pcb back to CM
722 atp = sotoatmpcb(so);
724 atp->atp_attr = *atp0->atp_conn->co_lattr;
725 strncpy(atp->atp_name, atp0->atp_name, T_ATM_APP_NAME_LEN);
729 atm_sock_stat.as_connfail[atp0->atp_type]++;
737 * Process Socket VCC Input Data
740 * tok owner's connection token (atm_pcb)
741 * m pointer to input packet buffer chain
748 atm_aal5_cpcs_data(tok, m)
756 so = atp->atp_socket;
761 * Ensure that the socket is able to receive data and
762 * that there's room in the socket buffer
764 if (((so->so_state & SS_ISCONNECTED) == 0) ||
765 (so->so_rcv.sb_state & SBS_CANTRCVMORE) ||
766 (len > sbspace(&so->so_rcv))) {
767 atm_sock_stat.as_indrop[atp->atp_type]++;
773 * Queue the data and notify the user
775 sbappendrecord(&so->so_rcv, m);
783 * Process getsockopt/setsockopt system calls
786 * so pointer to socket
787 * sopt pointer to socket option info
790 * 0 request processed
791 * errno error processing request - reason indicated
795 atm_aal5_ctloutput(so, sopt)
797 struct sockopt *sopt;
801 ATM_INTRO("ctloutput");
804 * Make sure this is for us
806 if (sopt->sopt_level != T_ATM_SIGNALING) {
809 atp = sotoatmpcb(so);
811 ATM_RETERR(ENOTCONN);
814 switch (sopt->sopt_dir) {
822 * Validate socket state
824 switch (sopt->sopt_name) {
827 case T_ATM_DROP_LEAF:
828 if ((so->so_state & SS_ISCONNECTED) == 0) {
829 ATM_RETERR(ENOTCONN);
838 if (so->so_state & SS_ISCONNECTED) {
845 * Validate and save user-supplied option data
847 err = atm_sock_setopt(so, sopt, atp);
859 err = atm_sock_getopt(so, sopt, atp);
870 * Initialize AAL5 Sockets
883 * Register our endpoint
885 if (atm_endpoint_register(&atm_aal5_endpt))
886 panic("atm_aal5_init: register");
889 * Set default connection attributes
891 atm_aal5_defattr.aal.v.aal5.forward_max_SDU_size = T_ATM_ABSENT;
892 atm_aal5_defattr.aal.v.aal5.backward_max_SDU_size = T_ATM_ABSENT;
893 atm_aal5_defattr.aal.v.aal5.SSCS_type = T_ATM_NULL;
898 * Get Connection's Application/Owner Name
901 * tok owner's connection token (atm_pcb)
904 * addr pointer to string containing our name
908 atm_aal5_getname(tok)
913 return (atp->atp_name);