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33 * @(#)idp_usrreq.c 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/netns/idp_usrreq.c,v 1.9 1999/08/28 00:49:47 peter Exp $
35 * $DragonFly: src/sys/netproto/ns/idp_usrreq.c,v 1.15 2008/03/07 11:34:21 sephe Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
42 #include <sys/protosw.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
45 #include <sys/errno.h>
47 #include <sys/thread2.h>
50 #include <net/route.h>
59 extern int idpcksum; /* from ns_input.c */
60 extern long ns_pexseq; /* from ns_input.c */
61 extern struct nspcb nsrawpcb; /* from ns_input.c */
63 struct idpstat idpstat;
66 * IDP protocol implementation.
69 struct sockaddr_ns idp_ns = { sizeof(idp_ns), AF_NS };
72 * This may also be called for raw listeners.
75 idp_input(struct mbuf *m, ...)
77 struct idp *idp = mtod(m, struct idp *);
78 struct ifnet *ifp = m->m_pkthdr.rcvif;
83 nsp = __va_arg(ap, struct nspcb *);
89 * Construct sockaddr format source address.
90 * Stuff source address and datagram in user buffer.
92 idp_ns.sns_addr = idp->idp_sna;
93 if (ns_neteqnn(idp->idp_sna.x_net, ns_zeronet) && ifp) {
94 struct ifaddr_container *ifac;
96 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
97 struct ifaddr *ifa = ifac->ifa;
99 if (ifa->ifa_addr->sa_family == AF_NS) {
100 idp_ns.sns_addr.x_net =
101 IA_SNS(ifa)->sns_addr.x_net;
106 nsp->nsp_rpt = idp->idp_pt;
107 if ( ! (nsp->nsp_flags & NSP_RAWIN) ) {
108 m->m_len -= sizeof (struct idp);
109 m->m_pkthdr.len -= sizeof (struct idp);
110 m->m_data += sizeof (struct idp);
112 if (ssb_appendaddr(&nsp->nsp_socket->so_rcv, (struct sockaddr *)&idp_ns,
115 sorwakeup(nsp->nsp_socket);
122 idp_abort(struct nspcb *nsp)
124 struct socket *so = nsp->nsp_socket;
126 ns_pcbdisconnect(nsp);
127 soisdisconnected(so);
130 * Drop connection, reporting
131 * the specified error.
134 idp_drop(struct nspcb *nsp, int errno)
136 struct socket *so = nsp->nsp_socket;
139 * someday, in the xerox world
140 * we will generate error protocol packets
141 * announcing that the socket has gone away.
143 /*if (TCPS_HAVERCVDSYN(tp->t_state)) {
144 tp->t_state = TCPS_CLOSED;
147 so->so_error = errno;
148 ns_pcbdisconnect(nsp);
149 soisdisconnected(so);
155 idp_output(struct mbuf *m0, struct socket *so, ...)
157 struct nspcb *nsp = sotonspcb(so);
162 struct mbuf *mprev = NULL;
165 * Calculate data length.
167 for (m = m0; m; m = m->m_next) {
172 * Make sure packet is actually of even length.
177 if ((m->m_flags & M_EXT) == 0 &&
178 (m->m_len + m->m_data < &m->m_dat[MLEN])) {
181 struct mbuf *m1 = m_get(MB_DONTWAIT, MT_DATA);
188 * mtod(m1, char *) = 0;
195 * Fill in mbuf with extended IDP header
196 * and addresses and length put into network format.
199 if (nsp->nsp_flags & NSP_RAWOUT) {
200 idp = mtod(m, struct idp *);
202 M_PREPEND(m, sizeof (struct idp), MB_DONTWAIT);
205 idp = mtod(m, struct idp *);
207 idp->idp_pt = nsp->nsp_dpt;
208 idp->idp_sna = nsp->nsp_laddr;
209 idp->idp_dna = nsp->nsp_faddr;
210 len += sizeof (struct idp);
213 idp->idp_len = htons((u_short)len);
217 len = ((len - 1) | 1) + 1;
218 idp->idp_sum = ns_cksum(m, len);
220 idp->idp_sum = 0xffff;
225 if (so->so_options & SO_DONTROUTE)
226 return (ns_output(m, NULL,
227 (so->so_options & SO_BROADCAST) | NS_ROUTETOIF));
229 * Use cached route for previous datagram if
230 * possible. If the previous net was the same
231 * and the interface was a broadcast medium, or
232 * if the previous destination was identical,
235 * NB: We don't handle broadcasts because that
236 * would require 3 subroutine calls.
238 ro = &nsp->nsp_route;
239 #ifdef ancient_history
241 * I think that this will all be handled in ns_pcbconnect!
244 if(ns_neteq(nsp->nsp_lastdst, idp->idp_dna)) {
246 * This assumes we have no GH type routes
248 if (ro->ro_rt->rt_flags & RTF_HOST) {
249 if (!ns_hosteq(nsp->nsp_lastdst, idp->idp_dna))
253 if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
254 struct ns_addr *dst =
255 &satons_addr(ro->ro_dst);
256 dst->x_host = idp->idp_dna.x_host;
259 * Otherwise, we go through the same gateway
260 * and dst is already set up.
268 nsp->nsp_lastdst = idp->idp_dna;
269 #endif /* ancient_history */
270 if (noIdpRoute) ro = 0;
271 return (ns_output(m, ro, so->so_options & SO_BROADCAST));
276 idp_ctloutput(int req, struct socket *so, int level, int name,
280 struct nspcb *nsp = sotonspcb(so);
291 m = m_get(MB_DONTWAIT, MT_DATA);
297 mask = NSP_ALL_PACKETS;
300 case SO_HEADERS_ON_INPUT:
304 case SO_HEADERS_ON_OUTPUT:
307 m->m_len = sizeof(short);
308 *mtod(m, short *) = nsp->nsp_flags & mask;
311 case SO_DEFAULT_HEADERS:
312 m->m_len = sizeof(struct idp);
314 struct idp *idp = mtod(m, struct idp *);
318 idp->idp_pt = nsp->nsp_dpt;
319 idp->idp_dna = nsp->nsp_faddr;
320 idp->idp_sna = nsp->nsp_laddr;
325 m->m_len = sizeof(long);
326 *mtod(m, long *) = ns_pexseq++;
340 mask = NSP_ALL_PACKETS;
343 case SO_HEADERS_ON_INPUT:
347 case SO_HEADERS_ON_OUTPUT:
350 if (value && *value) {
351 ok = mtod(*value, int *);
353 nsp->nsp_flags |= mask;
355 nsp->nsp_flags &= ~mask;
356 } else error = EINVAL;
359 case SO_DEFAULT_HEADERS:
362 = mtod(*value, struct idp *);
363 nsp->nsp_dpt = idp->idp_pt;
369 error = nsip_route(*value);
384 * IDP_USRREQ PROCEDURES
388 idp_usr_abort(struct socket *so)
390 struct nspcb *nsp = sotonspcb(so);
396 soisdisconnected(so);
405 idp_attach(struct socket *so, int proto, struct pru_attach_info *ai)
407 struct nspcb *nsp = sotonspcb(so);
412 if ((error = ns_pcballoc(so, &nspcb)) != 0)
414 error = soreserve(so, 2048, 2048, ai->sb_rlimit);
419 idp_raw_attach(struct socket *so, int proto, struct pru_attach_info *ai)
421 struct nspcb *nsp = sotonspcb(so);
424 #ifdef NS_PRIV_SOCKETS
425 if ((so->so_state & SS_PRIV) == 0)
430 if ((error = ns_pcballoc(so, &nsrawpcb)) != 0)
432 if ((error = soreserve(so, 2048, 2048, ai->sb_rlimit)) != 0)
435 nsp->nsp_faddr.x_host = ns_broadhost;
436 nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT;
441 idp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
443 struct nspcb *nsp = sotonspcb(so);
447 error = ns_pcbbind(nsp, nam);
454 idp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
456 struct nspcb *nsp = sotonspcb(so);
460 if (!ns_nullhost(nsp->nsp_faddr))
462 else if ((error = ns_pcbconnect(nsp, nam)) == 0)
471 idp_detach(struct socket *so)
473 struct nspcb *nsp = sotonspcb(so);
486 idp_usr_disconnect(struct socket *so)
488 struct nspcb *nsp = sotonspcb(so);
492 if (ns_nullhost(nsp->nsp_faddr)) {
496 ns_pcbdisconnect(nsp);
497 soisdisconnected(so);
506 idp_peeraddr(struct socket *so, struct sockaddr **pnam)
508 struct nspcb *nsp = sotonspcb(so);
512 ns_setpeeraddr(nsp, pnam);
521 idp_send(struct socket *so, int flags, struct mbuf *m,
522 struct sockaddr *addr, struct mbuf *control,
525 struct nspcb *nsp = sotonspcb(so);
526 struct ns_addr laddr;
531 if (control && control->m_len) {
538 laddr = nsp->nsp_laddr;
539 if (!ns_nullhost(nsp->nsp_faddr))
542 error = ns_pcbconnect(nsp, addr);
544 if (ns_nullhost(nsp->nsp_faddr))
550 error = idp_output(m, so);
553 ns_pcbdisconnect(nsp);
554 nsp->nsp_laddr.x_host = laddr.x_host;
555 nsp->nsp_laddr.x_port = laddr.x_port;
568 idp_sockaddr(struct socket *so, struct sockaddr **pnam)
570 struct nspcb *nsp = sotonspcb(so);
574 ns_setsockaddr(nsp, pnam);
583 idp_shutdown(struct socket *so)
589 struct pr_usrreqs idp_usrreqs = {
590 .pru_abort = idp_usr_abort,
591 .pru_accept = pru_accept_notsupp,
592 .pru_attach = idp_attach,
593 .pru_bind = idp_bind,
594 .pru_connect = idp_connect,
595 .pru_connect2 = pru_connect2_notsupp,
596 .pru_control = ns_control,
597 .pru_detach = idp_detach,
598 .pru_disconnect = idp_usr_disconnect,
599 .pru_listen = pru_listen_notsupp,
600 .pru_peeraddr = idp_peeraddr,
601 .pru_rcvd = pru_rcvd_notsupp,
602 .pru_rcvoob = pru_rcvoob_notsupp,
603 .pru_send = idp_send,
604 .pru_sense = pru_sense_null,
605 .pru_shutdown = idp_shutdown,
606 .pru_sockaddr = idp_sockaddr,
607 .pru_sosend = sosend,
608 .pru_soreceive = soreceive
611 struct pr_usrreqs idp_raw_usrreqs = {
612 .pru_abort = idp_usr_abort,
613 .pru_accept = pru_accept_notsupp,
614 .pru_attach = idp_raw_attach,
615 .pru_bind = idp_bind,
616 .pru_connect = idp_connect,
617 .pru_connect2 = pru_connect2_notsupp,
618 .pru_control = ns_control,
619 .pru_detach = idp_detach,
620 .pru_disconnect = idp_usr_disconnect,
621 .pru_listen = pru_listen_notsupp,
622 .pru_peeraddr = idp_peeraddr,
623 .pru_rcvd = pru_rcvd_notsupp,
624 .pru_rcvoob = pru_rcvoob_notsupp,
625 .pru_send = idp_send,
626 .pru_sense = pru_sense_null,
627 .pru_shutdown = idp_shutdown,
628 .pru_sockaddr = idp_sockaddr,
629 .pru_sosend = sosend,
630 .pru_soreceive = soreceive