Import mrouted version 3.9-beta3+IOS12 . This is a version of 3.9-beta3vendor/mrouted

with minor changes to work around a bug in Cisco's IOS version 12.0 .
3.9-beta3 is much improved over 3.8, and is only labelled "beta" because
of missing features, as opposed to instability or known bugs.

1 files changed, 145 insertions, 0 deletions

diff --git a/usr.sbin/mrouted/ipip.c b/usr.sbin/mrouted/ipip.c
new file mode 100644
index 000000000000..6e88d932d3b4
--- /dev/null
+++ b/usr.sbin/mrouted/ipip.c
@@ -0,0 +1,145 @@
+/*
+ * The mrouted program is covered by the license in the accompanying file
+ * named "LICENSE".  Use of the mrouted program represents acceptance of
+ * the terms and conditions listed in that file.
+ *
+ * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
+ * Leland Stanford Junior University.
+ *
+ *
+ * ipip.c,v 3.8.4.6 1998/01/06 01:57:45 fenner Exp
+ */
+
+
+#include "defs.h"
+
+#ifndef lint
+static char rcsid[] = "@(#) $Id: \
+ipip.c,v 3.8.4.6 1998/01/06 01:57:45 fenner Exp $";
+#endif
+
+/*
+ * Exported variables.
+ */
+#ifdef notyet
+int		raw_socket;		    /* socket for raw network I/O  */
+#endif
+/*
+ *XXX For now, we just use the IGMP socket to send packets.
+ * This is legal in BSD, because the protocol # is not checked
+ * on raw sockets.  The k_* interfaces need to gain a socket
+ * argument so that we can call them on the raw_socket also.
+ */
+#define	raw_socket	igmp_socket
+
+/*
+ * Private variables.
+ */
+static int rawid = 0;
+
+/*
+ * Open and initialize the raw socket.
+ */
+void
+init_ipip()
+{
+#ifdef notyet
+    if ((raw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
+	log(LOG_ERR, errno, "Raw IP socket");
+#endif
+}
+
+/*
+ * Allocate and fill in static IP header for encapsulating on a tunnel.
+ */
+void
+init_ipip_on_vif(v)
+    struct uvif *v;
+{
+    struct ip *ip;
+
+    ip = v->uv_encap_hdr = (struct ip *)malloc(sizeof(struct ip));
+    if (ip == NULL)
+	log(LOG_ERR, 0, "out of memory");
+    bzero(ip, sizeof(struct ip));
+    /*
+     * Fields zeroed that aren't filled in later:
+     * - IP ID (let the kernel fill it in)
+     * - Offset (we don't send fragments)
+     * - Checksum (let the kernel fill it in)
+     */
+    ip->ip_v   = IPVERSION;
+    ip->ip_hl  = sizeof(struct ip) >> 2;
+    ip->ip_tos = 0xc0;		/* Internet Control */
+    ip->ip_ttl = MAXTTL;	/* applies to unicasts only */
+    ip->ip_p   = IPPROTO_IPIP;
+    ip->ip_src.s_addr = v->uv_lcl_addr;
+    ip->ip_dst.s_addr = v->uv_rmt_addr;
+}
+
+/*
+ * Call build_igmp() to build an IGMP message in the output packet buffer.
+ * Then fill in the fields of the IP packet that build_igmp() left for the
+ * kernel to fill in, and encapsulate the original packet with the
+ * pre-created ip header for this vif.
+ */
+void
+send_ipip(src, dst, type, code, group, datalen, v)
+    u_int32 src, dst;
+    int type, code;
+    u_int32 group;
+    int datalen;
+    struct uvif *v;
+{
+    struct msghdr msg;
+    struct iovec iov[2];
+    struct sockaddr_in sdst;
+    struct ip *ip;
+
+    build_igmp(src, dst, type, code, group, datalen);
+    ip = (struct ip *)send_buf;
+#ifndef RAW_OUTPUT_IS_RAW
+    ip->ip_len = htons(ip->ip_len);
+#endif
+    ip->ip_id = htons(rawid++);
+    ip->ip_sum = 0;
+    ip->ip_sum = inet_cksum((u_short *)ip, ip->ip_hl << 2);
+
+    ip = v->uv_encap_hdr;
+    ip->ip_len = 2 * MIN_IP_HEADER_LEN + IGMP_MINLEN + datalen;
+#ifdef RAW_OUTPUT_IS_RAW
+    ip->ip_len = htons(ip->ip_len);
+#endif
+
+    bzero(&sdst, sizeof(sdst));
+    sdst.sin_family = AF_INET;
+#ifdef HAVE_SA_LEN
+    sdst.sin_len = sizeof(sdst);
+#endif
+    sdst.sin_addr = ip->ip_dst;
+
+    iov[0].iov_base = (caddr_t)v->uv_encap_hdr;
+    iov[0].iov_len = sizeof(struct ip);
+    iov[1].iov_base = (caddr_t)send_buf;
+    iov[1].iov_len = MIN_IP_HEADER_LEN + IGMP_MINLEN + datalen;
+
+    bzero(&msg, sizeof(msg));
+    msg.msg_name = (caddr_t)&sdst;
+    msg.msg_namelen = sizeof(sdst);
+    msg.msg_iov = iov;
+    msg.msg_iovlen = 2;
+    if (sendmsg(raw_socket, &msg, 0) < 0) {
+	if (errno == ENETDOWN)
+	    check_vif_state();
+	else
+	    log(LOG_WARNING, errno,
+		"sendmsg to %s on %s",
+		inet_fmt(sdst.sin_addr.s_addr, s1), inet_fmt(src, s2));
+    }
+
+    IF_DEBUG(DEBUG_PKT|igmp_debug_kind(type, code))
+    log(LOG_DEBUG, 0, "SENT %s from %-15s to %s encaped to %s",
+	igmp_packet_kind(type, code), src == INADDR_ANY ? "INADDR_ANY" :
+				 inet_fmt(src, s1), inet_fmt(dst, s2),
+				 inet_fmt(sdst.sin_addr.s_addr, s3));
+}