+/*
+ * 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, control);
+
+ if (error && (req == PRU_ATTACH) && so->so_pcb)
+ free(so->so_pcb, M_PCB);
+ return (error);
+}
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