Bring in KAME IPv6 tcpdump. replaces esp/ah/isakmp decoder.

Hope I did not break anything.  Portability on IPv4-only node needs checking,
I'll do this very soon.  (sorry for rather jumbo commit)

XXx what is _FAVOR_BSD?

1 files changed, 153 insertions, 0 deletions

diff --git a/print-ip6opts.c b/print-ip6opts.c
new file mode 100644
index 00000000..fe715b79
--- /dev/null
+++ b/print-ip6opts.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 1998 WIDE Project.
+ * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
+ */
+
+#ifdef INET6
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/ip6.h>
+
+#include <stdio.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+
+void
+ip6_opt_print(const u_char *bp, int len)
+{
+    int i;
+    int optlen;
+
+    for (i = 0; i < len; i += optlen) {
+	switch (bp[i]) {
+	case IP6OPT_PAD1:
+	    optlen = 1;
+	    break;
+	case IP6OPT_PADN:
+	    if (len - i < IP6OPT_MINLEN) {
+		printf("(padn: trunc)");
+		goto trunc;
+	    }
+	    optlen = bp[i + 1] + 2;
+	    break;
+	case IP6OPT_RTALERT:
+	    if (len - i < IP6OPT_RTALERT_LEN) {
+		printf("(rtalert: trunc)");
+		goto trunc;
+	    }
+	    if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
+		printf("(rtalert: invalid len %d)", bp[i + 1]);
+		goto trunc;
+	    }
+	    printf("(rtalert: 0x%04x) ", ntohs(*(u_short *)&bp[i + 2]));
+	    optlen = IP6OPT_RTALERT_LEN;
+	    break;
+	case IP6OPT_JUMBO:
+	    if (len - i < IP6OPT_JUMBO_LEN) {
+		printf("(jumbo: trunc)");
+		goto trunc;
+	    }
+	    if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
+		printf("(jumbo: invalid len %d)", bp[i + 1]);
+		goto trunc;
+	    }
+	    printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2]));
+	    optlen = IP6OPT_JUMBO_LEN;
+	    break;
+	default:
+	    if (len - i < IP6OPT_MINLEN) {
+		printf("(type %d: trunc)", bp[i]);
+		goto trunc;
+	    }
+	    printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
+	    optlen = bp[i + 1] + 2;
+	    break;
+	}
+    }
+
+#if 0
+end:
+#endif
+    return;
+
+trunc:
+    printf("[trunc] ");
+}
+
+int
+hbhopt_print(register const u_char *bp)
+{
+    const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
+    register const u_char *ep;
+    int hbhlen = 0;
+
+    /* 'ep' points to the end of avaible data. */
+    ep = snapend;
+    TCHECK(dp->ip6h_len);
+    hbhlen = (int)((dp->ip6h_len + 1) << 3);
+    TCHECK2(dp, hbhlen);
+    printf("HBH ");
+    if (vflag)
+	ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
+
+    return(hbhlen);
+
+  trunc:
+    fputs("[|HBH]", stdout);
+    return(hbhlen);
+}
+
+int
+dstopt_print(register const u_char *bp)
+{
+    const struct ip6_dest *dp = (struct ip6_dest *)bp;
+    register const u_char *ep;
+    int dstoptlen = 0;
+
+    /* 'ep' points to the end of avaible data. */
+    ep = snapend;
+    TCHECK(dp->ip6d_len);
+    dstoptlen = (int)((dp->ip6d_len + 1) << 3);
+    TCHECK2(dp, dstoptlen);
+    printf("DSTOPT ");
+    if (vflag) {
+	ip6_opt_print((const u_char *)dp + sizeof(*dp),
+	    dstoptlen - sizeof(*dp));
+    }
+
+    return(dstoptlen);
+
+  trunc:
+    fputs("[|DSTOPT]", stdout);
+    return(dstoptlen);
+}
+#endif /* INET6 */