1 /* A sample version of rip_output() from /sys/netinet/raw_ip.c */
4 register struct mbuf *m;
7 register struct ip *ip;
9 struct rawcb *rp = sotorawcb(so);
10 struct sockaddr_in *sin;
12 short proto = rp->rcb_proto.sp_protocol;
14 short proto = so->so_proto->pr_protocol;
17 * if the protocol is IPPROTO_RAW, the user handed us a
18 * complete IP packet. Otherwise, allocate an mbuf for a
19 * header and fill it in as needed.
21 if (proto != IPPROTO_RAW) {
23 * Calculate data length and get an mbuf
29 for (m0 = m; m; m = m->m_next)
32 m = m_get(M_DONTWAIT, MT_HEADER);
38 m->m_off = MMAXOFF - sizeof(struct ip);
39 m->m_len = sizeof(struct ip);
42 ip = mtod(m, struct ip *);
46 ip->ip_len = sizeof(struct ip) + len;
49 ip = mtod(m, struct ip *);
51 if (rp->rcb_flags & RAW_LADDR) {
52 sin = (struct sockaddr_in *)&rp->rcb_laddr;
53 if (sin->sin_family != AF_INET) {
57 ip->ip_src.s_addr = sin->sin_addr.s_addr;
59 ip->ip_src.s_addr = 0;
61 ip->ip_dst = ((struct sockaddr_in *)&rp->rcb_faddr)->sin_addr;
64 return (ip_output(m, rp->rcb_options, &rp->rcb_route,
65 (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST));
67 return (ip_output(m, (struct mbuf *)0, &rp->rcb_route,
68 (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST));