/* $OpenBSD: raw_usrreq.c,v 1.16 2012/12/12 17:23:53 mikeb Exp $ */ /* $NetBSD: raw_usrreq.c,v 1.11 1996/02/13 22:00:43 christos Exp $ */ /* * Copyright (c) 1980, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 */ #include <sys/param.h> #include <sys/mbuf.h> #include <sys/domain.h> #include <sys/protosw.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <sys/errno.h> #include <sys/systm.h> #include <net/if.h> #include <net/route.h> #include <net/netisr.h> #include <net/raw_cb.h> #include <sys/stdarg.h> /* * Initialize raw connection block q. */ void raw_init(void) { LIST_INIT(&rawcb); } /* * Raw protocol input routine. Find the socket * associated with the packet(s) and move them over. If * nothing exists for this packet, drop it. */ /* * Raw protocol interface. */ void raw_input(struct mbuf *m0, ...) { struct rawcb *rp; struct mbuf *m = m0; int sockets = 0; struct socket *last; va_list ap; struct sockproto *proto; struct sockaddr *src, *dst; va_start(ap, m0); proto = va_arg(ap, struct sockproto *); src = va_arg(ap, struct sockaddr *); dst = va_arg(ap, struct sockaddr *); va_end(ap); last = 0; LIST_FOREACH(rp, &rawcb, rcb_list) { if (rp->rcb_socket->so_state & SS_CANTRCVMORE) continue; if (rp->rcb_proto.sp_family != proto->sp_family) continue; if (rp->rcb_proto.sp_protocol && rp->rcb_proto.sp_protocol != proto->sp_protocol) continue; /* * We assume the lower level routines have * placed the address in a canonical format * suitable for a structure comparison. * * Note that if the lengths are not the same * the comparison will fail at the first byte. */ #define equal(a1, a2) \ (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) continue; if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) continue; if (last) { struct mbuf *n; if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { if (sbappendaddr(&last->so_rcv, src, n, (struct mbuf *)0) == 0) /* should notify about lost packet */ m_freem(n); else { sorwakeup(last); sockets++; } } } last = rp->rcb_socket; } if (last) { if (sbappendaddr(&last->so_rcv, src, m, (struct mbuf *)0) == 0) m_freem(m); else { sorwakeup(last); sockets++; } } else m_freem(m); } /*ARGSUSED*/ void * raw_ctlinput(int cmd, struct sockaddr *arg, u_int rdomain, void *d) { if (cmd < 0 || cmd >= PRC_NCMDS) return NULL; return NULL; /* INCOMPLETE */ } /*ARGSUSED*/ int raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct proc *p) { struct rawcb *rp = sotorawcb(so); int error = 0; int len, s; if (req == PRU_CONTROL) return (EOPNOTSUPP); if (control && control->m_len) { error = EOPNOTSUPP; goto release; } if (rp == 0) { error = EINVAL; goto release; } s = splsoftnet(); switch (req) { /* * Allocate a raw control block and fill in the * necessary info to allow packets to be routed to * the appropriate raw interface routine. */ case PRU_ATTACH: if ((so->so_state & SS_PRIV) == 0) { error = EACCES; break; } error = raw_attach(so, (int)(long)nam); break; /* * Destroy state just before socket deallocation. * Flush data or not depending on the options. */ case PRU_DETACH: if (rp == 0) { error = ENOTCONN; break; } raw_detach(rp); break; #ifdef notdef /* * If a socket isn't bound to a single address, * the raw input routine will hand it anything * within that protocol family (assuming there's * nothing else around it should go to). */ case PRU_CONNECT: if (rp->rcb_faddr) { error = EISCONN; break; } nam = m_copym(nam, 0, M_COPYALL, M_WAIT); rp->rcb_faddr = mtod(nam, struct sockaddr *); soisconnected(so); break; case PRU_BIND: if (rp->rcb_laddr) { error = EINVAL; /* XXX */ break; } error = raw_bind(so, nam); break; #else case PRU_CONNECT: case PRU_BIND: #endif case PRU_CONNECT2: error = EOPNOTSUPP; break; case PRU_DISCONNECT: if (rp->rcb_faddr == 0) { error = ENOTCONN; break; } raw_disconnect(rp); soisdisconnected(so); break; /* * Mark the connection as being incapable of further input. */ case PRU_SHUTDOWN: socantsendmore(so); break; /* * Ship a packet out. The appropriate raw output * routine handles any massaging necessary. */ case PRU_SEND: if (nam) { if (rp->rcb_faddr) { error = EISCONN; break; } rp->rcb_faddr = mtod(nam, struct sockaddr *); } else if (rp->rcb_faddr == 0) { error = ENOTCONN; break; } error = (*so->so_proto->pr_output)(m, so); m = NULL; if (nam) rp->rcb_faddr = 0; break; case PRU_ABORT: raw_disconnect(rp); sofree(so); soisdisconnected(so); break; case PRU_SENSE: /* * stat: don't bother with a blocksize. */ splx(s); return (0); /* * Not supported. */ case PRU_RCVOOB: case PRU_RCVD: splx(s); return (EOPNOTSUPP); case PRU_LISTEN: case PRU_ACCEPT: case PRU_SENDOOB: error = EOPNOTSUPP; break; case PRU_SOCKADDR: if (rp->rcb_laddr == 0) { error = EINVAL; break; } len = rp->rcb_laddr->sa_len; bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), (unsigned)len); nam->m_len = len; break; case PRU_PEERADDR: if (rp->rcb_faddr == 0) { error = ENOTCONN; break; } len = rp->rcb_faddr->sa_len; bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), (unsigned)len); nam->m_len = len; break; default: panic("raw_usrreq"); } splx(s); release: if (m != NULL) m_freem(m); return (error); }