1 files changed, 73 insertions, 0 deletions
diff --git a/contrib/traceroute/rip_output.c b/contrib/traceroute/rip_output.c
new file mode 100644
index 0000000..0b092b1
--- /dev/null
+++ b/contrib/traceroute/rip_output.c
@@ -0,0 +1,73 @@
+/* A sample version of rip_output() from /sys/netinet/raw_ip.c */
+
+rip_output(m, so)
+	register struct mbuf *m;
+	struct socket *so;
+{
+	register struct ip *ip;
+	int error;
+	struct rawcb *rp = sotorawcb(so);
+	struct sockaddr_in *sin;
+#if BSD>=43
+	short proto = rp->rcb_proto.sp_protocol;
+#else
+	short proto = so->so_proto->pr_protocol;
+#endif
+	/*
+	 * if the protocol is IPPROTO_RAW, the user handed us a
+	 * complete IP packet.  Otherwise, allocate an mbuf for a
+	 * header and fill it in as needed.
+	 */
+	if (proto != IPPROTO_RAW) {
+		/*
+		 * Calculate data length and get an mbuf
+		 * for IP header.
+		 */
+		int len = 0;
+		struct mbuf *m0;
+
+		for (m0 = m; m; m = m->m_next)
+			len += m->m_len;
+
+		m = m_get(M_DONTWAIT, MT_HEADER);
+		if (m == 0) {
+			m = m0;
+			error = ENOBUFS;
+			goto bad;
+		}
+		m->m_off = MMAXOFF - sizeof(struct ip);
+		m->m_len = sizeof(struct ip);
+		m->m_next = m0;
+
+		ip = mtod(m, struct ip *);
+		ip->ip_tos = 0;
+		ip->ip_off = 0;
+		ip->ip_p = proto;
+		ip->ip_len = sizeof(struct ip) + len;
+		ip->ip_ttl = MAXTTL;
+	} else
+		ip = mtod(m, struct ip *);
+
+	if (rp->rcb_flags & RAW_LADDR) {
+		sin = (struct sockaddr_in *)&rp->rcb_laddr;
+		if (sin->sin_family != AF_INET) {
+			error = EAFNOSUPPORT;
+			goto bad;
+		}
+		ip->ip_src.s_addr = sin->sin_addr.s_addr;
+	} else
+		ip->ip_src.s_addr = 0;
+
+	ip->ip_dst = ((struct sockaddr_in *)&rp->rcb_faddr)->sin_addr;
+
+#if BSD>=43
+	return (ip_output(m, rp->rcb_options, &rp->rcb_route,
+	   (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST));
+#else
+	return (ip_output(m, (struct mbuf *)0, &rp->rcb_route,
+	   (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST));
+#endif
+bad:
+	m_freem(m);
+	return (error);
+}