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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 $
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/malloc.h>
41 #include <sys/protosw.h>
42 #include <sys/socket.h>
43 #include <sys/socketvar.h>
44 #include <sys/errno.h>
48 #include <net/route.h>
51 #include <netns/ns_pcb.h>
52 #include <netns/ns_if.h>
53 #include <netns/idp.h>
54 #include <netns/idp_var.h>
55 #include <netns/ns_error.h>
58 * IDP protocol implementation.
61 struct sockaddr_ns idp_ns = { sizeof(idp_ns), AF_NS };
64 * This may also be called for raw listeners.
68 register struct nspcb *nsp;
70 register struct idp *idp = mtod(m, struct idp *);
71 struct ifnet *ifp = m->m_pkthdr.rcvif;
76 * Construct sockaddr format source address.
77 * Stuff source address and datagram in user buffer.
79 idp_ns.sns_addr = idp->idp_sna;
80 if (ns_neteqnn(idp->idp_sna.x_net, ns_zeronet) && ifp) {
81 register struct ifaddr *ifa;
83 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
84 if (ifa->ifa_addr->sa_family == AF_NS) {
85 idp_ns.sns_addr.x_net =
86 IA_SNS(ifa)->sns_addr.x_net;
91 nsp->nsp_rpt = idp->idp_pt;
92 if ( ! (nsp->nsp_flags & NSP_RAWIN) ) {
93 m->m_len -= sizeof (struct idp);
94 m->m_pkthdr.len -= sizeof (struct idp);
95 m->m_data += sizeof (struct idp);
97 if (sbappendaddr(&nsp->nsp_socket->so_rcv, (struct sockaddr *)&idp_ns,
98 m, (struct mbuf *)0) == 0)
100 sorwakeup(nsp->nsp_socket);
109 struct socket *so = nsp->nsp_socket;
111 ns_pcbdisconnect(nsp);
112 soisdisconnected(so);
115 * Drop connection, reporting
116 * the specified error.
120 register struct nspcb *nsp;
123 struct socket *so = nsp->nsp_socket;
126 * someday, in the xerox world
127 * we will generate error protocol packets
128 * announcing that the socket has gone away.
130 /*if (TCPS_HAVERCVDSYN(tp->t_state)) {
131 tp->t_state = TCPS_CLOSED;
132 (void) tcp_output(tp);
134 so->so_error = errno;
135 ns_pcbdisconnect(nsp);
136 soisdisconnected(so);
144 register struct mbuf *m;
145 register struct idp *idp;
146 register struct socket *so;
147 register int len = 0;
148 register struct route *ro;
153 * Calculate data length.
155 for (m = m0; m; m = m->m_next) {
160 * Make sure packet is actually of even length.
165 if ((m->m_flags & M_EXT) == 0 &&
166 (m->m_len + m->m_data < &m->m_dat[MLEN])) {
169 struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);
176 * mtod(m1, char *) = 0;
183 * Fill in mbuf with extended IDP header
184 * and addresses and length put into network format.
187 if (nsp->nsp_flags & NSP_RAWOUT) {
188 idp = mtod(m, struct idp *);
190 M_PREPEND(m, sizeof (struct idp), M_DONTWAIT);
193 idp = mtod(m, struct idp *);
195 idp->idp_pt = nsp->nsp_dpt;
196 idp->idp_sna = nsp->nsp_laddr;
197 idp->idp_dna = nsp->nsp_faddr;
198 len += sizeof (struct idp);
201 idp->idp_len = htons((u_short)len);
205 len = ((len - 1) | 1) + 1;
206 idp->idp_sum = ns_cksum(m, len);
208 idp->idp_sum = 0xffff;
213 so = nsp->nsp_socket;
214 if (so->so_options & SO_DONTROUTE)
215 return (ns_output(m, (struct route *)0,
216 (so->so_options & SO_BROADCAST) | NS_ROUTETOIF));
218 * Use cached route for previous datagram if
219 * possible. If the previous net was the same
220 * and the interface was a broadcast medium, or
221 * if the previous destination was identical,
224 * NB: We don't handle broadcasts because that
225 * would require 3 subroutine calls.
227 ro = &nsp->nsp_route;
228 #ifdef ancient_history
230 * I think that this will all be handled in ns_pcbconnect!
233 if(ns_neteq(nsp->nsp_lastdst, idp->idp_dna)) {
235 * This assumes we have no GH type routes
237 if (ro->ro_rt->rt_flags & RTF_HOST) {
238 if (!ns_hosteq(nsp->nsp_lastdst, idp->idp_dna))
242 if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
243 register struct ns_addr *dst =
244 &satons_addr(ro->ro_dst);
245 dst->x_host = idp->idp_dna.x_host;
248 * Otherwise, we go through the same gateway
249 * and dst is already set up.
254 ro->ro_rt = (struct rtentry *)0;
257 nsp->nsp_lastdst = idp->idp_dna;
258 #endif /* ancient_history */
259 if (noIdpRoute) ro = 0;
260 return (ns_output(m, ro, so->so_options & SO_BROADCAST));
263 idp_ctloutput(req, so, level, name, value)
269 register struct mbuf *m;
270 struct nspcb *nsp = sotonspcb(so);
272 extern long ns_pexseq;
282 m = m_get(M_DONTWAIT, MT_DATA);
288 mask = NSP_ALL_PACKETS;
291 case SO_HEADERS_ON_INPUT:
295 case SO_HEADERS_ON_OUTPUT:
298 m->m_len = sizeof(short);
299 *mtod(m, short *) = nsp->nsp_flags & mask;
302 case SO_DEFAULT_HEADERS:
303 m->m_len = sizeof(struct idp);
305 register struct idp *idp = mtod(m, struct idp *);
309 idp->idp_pt = nsp->nsp_dpt;
310 idp->idp_dna = nsp->nsp_faddr;
311 idp->idp_sna = nsp->nsp_laddr;
316 m->m_len = sizeof(long);
317 *mtod(m, long *) = ns_pexseq++;
331 mask = NSP_ALL_PACKETS;
334 case SO_HEADERS_ON_INPUT:
338 case SO_HEADERS_ON_OUTPUT:
341 if (value && *value) {
342 ok = mtod(*value, int *);
344 nsp->nsp_flags |= mask;
346 nsp->nsp_flags &= ~mask;
347 } else error = EINVAL;
350 case SO_DEFAULT_HEADERS:
352 register struct idp *idp
353 = mtod(*value, struct idp *);
354 nsp->nsp_dpt = idp->idp_pt;
360 error = nsip_route(*value);
374 idp_usrreq(so, req, m, nam, control)
377 struct mbuf *m, *nam, *control;
379 struct nspcb *nsp = sotonspcb(so);
382 if (req == PRU_CONTROL)
383 return (ns_control(so, (int)m, (caddr_t)nam,
384 (struct ifnet *)control));
385 if (control && control->m_len) {
389 if (nsp == NULL && req != PRU_ATTACH) {
400 error = ns_pcballoc(so, &nspcb);
403 error = soreserve(so, (u_long) 2048, (u_long) 2048);
417 error = ns_pcbbind(nsp, nam);
425 if (!ns_nullhost(nsp->nsp_faddr)) {
429 error = ns_pcbconnect(nsp, nam);
443 if (ns_nullhost(nsp->nsp_faddr)) {
447 ns_pcbdisconnect(nsp);
448 soisdisconnected(so);
457 struct ns_addr laddr;
461 laddr = nsp->nsp_laddr;
462 if (!ns_nullhost(nsp->nsp_faddr)) {
467 * Must block input while temporarily connected.
470 error = ns_pcbconnect(nsp, nam);
476 if (ns_nullhost(nsp->nsp_faddr)) {
481 error = idp_output(nsp, m);
484 ns_pcbdisconnect(nsp);
486 nsp->nsp_laddr.x_host = laddr.x_host;
487 nsp->nsp_laddr.x_port = laddr.x_port;
495 soisdisconnected(so);
499 ns_setsockaddr(nsp, nam);
503 ns_setpeeraddr(nsp, nam);
508 * stat: don't bother with a blocksize.
523 return (EOPNOTSUPP); /* do not free mbuf's */
536 idp_raw_usrreq(so, req, m, nam, control)
539 struct mbuf *m, *nam, *control;
542 struct nspcb *nsp = sotonspcb(so);
543 extern struct nspcb nsrawpcb;
549 if (!(so->so_state & SS_PRIV) || (nsp != NULL)) {
553 error = ns_pcballoc(so, &nsrawpcb);
556 error = soreserve(so, (u_long) 2048, (u_long) 2048);
560 nsp->nsp_faddr.x_host = ns_broadhost;
561 nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT;
564 error = idp_usrreq(so, req, m, nam, control);