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- /*
- * Copyright (c) 1982, 1986, 1988 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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_ip.c 7.8 (Berkeley) 7/25/90
- */
-
- #include "param.h"
- #include "malloc.h"
- #include "mbuf.h"
- #include "socket.h"
- #include "protosw.h"
- #include "socketvar.h"
- #include "errno.h"
-
- #include "../net/if.h"
- #include "../net/route.h"
- #include "../net/raw_cb.h"
-
- #include "in.h"
- #include "in_systm.h"
- #include "ip.h"
- #include "ip_var.h"
- #include "in_pcb.h"
-
- /*
- * Raw interface to IP protocol.
- */
-
- struct sockaddr_in ripdst = { sizeof(ripdst), AF_INET };
- struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
- struct sockproto ripproto = { PF_INET };
- /*
- * Setup generic address and protocol structures
- * for raw_input routine, then pass them along with
- * mbuf chain.
- */
- rip_input(m)
- struct mbuf *m;
- {
- register struct ip *ip = mtod(m, struct ip *);
-
- ripproto.sp_protocol = ip->ip_p;
- ripdst.sin_addr = ip->ip_dst;
- ripsrc.sin_addr = ip->ip_src;
- if (raw_input(m, &ripproto, (struct sockaddr *)&ripsrc,
- (struct sockaddr *)&ripdst) == 0) {
- ipstat.ips_noproto++;
- ipstat.ips_delivered--;
- }
- }
-
- /*
- * Generate IP header and pass packet to ip_output.
- * Tack on options user may have setup with control call.
- */
- #define satosin(sa) ((struct sockaddr_in *)(sa))
- rip_output(m, so)
- register struct mbuf *m;
- struct socket *so;
- {
- register struct ip *ip;
- register struct raw_inpcb *rp = sotorawinpcb(so);
- register struct sockaddr_in *sin;
-
- /*
- * If the user handed us a complete IP packet, use it.
- * Otherwise, allocate an mbuf for a header and fill it in.
- */
- if (rp->rinp_flags & RINPF_HDRINCL)
- ip = mtod(m, struct ip *);
- else {
- M_PREPEND(m, sizeof(struct ip), M_WAIT);
- ip = mtod(m, struct ip *);
- ip->ip_tos = 0;
- ip->ip_off = 0;
- ip->ip_p = rp->rinp_rcb.rcb_proto.sp_protocol;
- ip->ip_len = m->m_pkthdr.len;
- if (sin = satosin(rp->rinp_rcb.rcb_laddr)) {
- ip->ip_src = sin->sin_addr;
- } else
- ip->ip_src.s_addr = 0;
- if (sin = satosin(rp->rinp_rcb.rcb_faddr))
- ip->ip_dst = sin->sin_addr;
- ip->ip_ttl = MAXTTL;
- }
- return (ip_output(m,
- (rp->rinp_flags & RINPF_HDRINCL)? (struct mbuf *)0: rp->rinp_options,
- &rp->rinp_route,
- (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST));
- }
-
- /*
- * Raw IP socket option processing.
- */
- rip_ctloutput(op, so, level, optname, m)
- int op;
- struct socket *so;
- int level, optname;
- struct mbuf **m;
- {
- int error = 0;
- register struct raw_inpcb *rp = sotorawinpcb(so);
-
- if (level != IPPROTO_IP)
- error = EINVAL;
- else switch (op) {
-
- case PRCO_SETOPT:
- switch (optname) {
-
- case IP_OPTIONS:
- return (ip_pcbopts(&rp->rinp_options, *m));
-
- case IP_HDRINCL:
- if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int)) {
- error = EINVAL;
- break;
- }
- if (*mtod(*m, int *))
- rp->rinp_flags |= RINPF_HDRINCL;
- else
- rp->rinp_flags &= ~RINPF_HDRINCL;
- break;
-
- default:
- error = EINVAL;
- break;
- }
- break;
-
- case PRCO_GETOPT:
- *m = m_get(M_WAIT, MT_SOOPTS);
- switch (optname) {
-
- case IP_OPTIONS:
- if (rp->rinp_options) {
- (*m)->m_len = rp->rinp_options->m_len;
- bcopy(mtod(rp->rinp_options, caddr_t),
- mtod(*m, caddr_t), (unsigned)(*m)->m_len);
- } else
- (*m)->m_len = 0;
- break;
-
- case IP_HDRINCL:
- (*m)->m_len = sizeof (int);
- *mtod(*m, int *) = rp->rinp_flags & RINPF_HDRINCL;
- break;
-
- default:
- error = EINVAL;
- m_freem(*m);
- *m = 0;
- break;
- }
- break;
- }
- if (op == PRCO_SETOPT && *m)
- (void)m_free(*m);
- return (error);
- }
-
- /*ARGSUSED*/
- rip_usrreq(so, req, m, nam, rights, control)
- register struct socket *so;
- int req;
- struct mbuf *m, *nam, *rights, *control;
- {
- register int error = 0;
- register struct raw_inpcb *rp = sotorawinpcb(so);
-
- switch (req) {
-
- case PRU_ATTACH:
- if (rp)
- panic("rip_attach");
- MALLOC(rp, struct raw_inpcb *, sizeof *rp, M_PCB, M_WAITOK);
- if (rp == 0)
- return (ENOBUFS);
- bzero((caddr_t)rp, sizeof *rp);
- so->so_pcb = (caddr_t)rp;
- break;
-
- case PRU_DETACH:
- if (rp == 0)
- panic("rip_detach");
- if (rp->rinp_options)
- m_freem(rp->rinp_options);
- if (rp->rinp_route.ro_rt)
- RTFREE(rp->rinp_route.ro_rt);
- if (rp->rinp_rcb.rcb_laddr)
- rp->rinp_rcb.rcb_laddr = 0;
- break;
-
- case PRU_BIND:
- {
- struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
-
- if (nam->m_len != sizeof(*addr))
- return (EINVAL);
- if ((ifnet == 0) ||
- ((addr->sin_family != AF_INET) &&
- (addr->sin_family != AF_IMPLINK)) ||
- (addr->sin_addr.s_addr &&
- ifa_ifwithaddr((struct sockaddr *)addr) == 0))
- return (EADDRNOTAVAIL);
- rp->rinp_rcb.rcb_laddr = (struct sockaddr *)&rp->rinp_laddr;
- rp->rinp_laddr = *addr;
- return (0);
- }
- case PRU_CONNECT:
- {
- struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
-
- if (nam->m_len != sizeof(*addr))
- return (EINVAL);
- if (ifnet == 0)
- return (EADDRNOTAVAIL);
- if ((addr->sin_family != AF_INET) &&
- (addr->sin_family != AF_IMPLINK))
- return (EAFNOSUPPORT);
- rp->rinp_rcb.rcb_faddr = (struct sockaddr *)&rp->rinp_faddr;
- rp->rinp_faddr = *addr;
- soisconnected(so);
- return (0);
- }
- }
- error = raw_usrreq(so, req, m, nam, rights, control);
-
- if (error && (req == PRU_ATTACH) && so->so_pcb)
- free(so->so_pcb, M_PCB);
- return (error);
- }
-