X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/6e67dba79fc8142ba1c55c82bd3551286126186c..ffa1470e5c7ff0e50028d085a481dc797b0b51ed:/print-ip6opts.c

diff --git a/print-ip6opts.c b/print-ip6opts.c
index e087af3f..0a4fcf81 100644
--- a/print-ip6opts.c
+++ b/print-ip6opts.c
@@ -1,7 +1,7 @@
 /*
  * 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:
@@ -13,7 +13,7 @@
  * 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
@@ -32,58 +32,139 @@
 #endif
 
 #ifndef lint
-static const char rcsid[] =
-     "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.5 2000-04-28 11:14:48 itojun Exp $";
+static const char rcsid[] _U_ =
+     "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.17.2.1 2005-04-20 22:19:06 guy Exp $";
 #endif
 
 #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 <tcpdump-stdinc.h>
 
 #include <stdio.h>
 
+#include "ip6.h"
+
 #include "interface.h"
 #include "addrtoname.h"
+#include "extract.h"
 
-void
-ip6_opt_print(const u_char *bp, int len)
+/* items outside of rfc2292bis */
+#ifndef IP6OPT_MINLEN
+#define IP6OPT_MINLEN	2
+#endif
+#ifndef IP6OPT_RTALERT_LEN
+#define IP6OPT_RTALERT_LEN	4
+#endif
+#ifndef IP6OPT_JUMBO_LEN
+#define IP6OPT_JUMBO_LEN	6
+#endif
+#define IP6OPT_HOMEADDR_MINLEN 18
+#define IP6OPT_BU_MINLEN       10
+#define IP6OPT_BA_MINLEN       13
+#define IP6OPT_BR_MINLEN        2
+#define IP6SOPT_UI            0x2
+#define IP6SOPT_UI_MINLEN       4
+#define IP6SOPT_ALTCOA        0x3
+#define IP6SOPT_ALTCOA_MINLEN  18
+#define IP6SOPT_AUTH          0x4
+#define IP6SOPT_AUTH_MINLEN     6
+
+static void ip6_sopt_print(const u_char *, int);
+
+static void
+ip6_sopt_print(const u_char *bp, int len)
 {
     int i;
     int optlen;
 
     for (i = 0; i < len; i += optlen) {
+	if (bp[i] == IP6OPT_PAD1)
+	    optlen = 1;
+	else {
+	    if (i + 1 < len)
+		optlen = bp[i + 1] + 2;
+	    else
+		goto trunc;
+	}
+	if (i + optlen > len)
+	    goto trunc;
+
 	switch (bp[i]) {
-#ifndef IP6OPT_PAD1
-#define IP6OPT_PAD1	0x00
-#endif
 	case IP6OPT_PAD1:
+            printf(", pad1");
+	    break;
+	case IP6OPT_PADN:
+	    if (len - i < IP6OPT_MINLEN) {
+		printf(", padn: trunc");
+		goto trunc;
+	    }
+            printf(", padn");
+	    break;
+        case IP6SOPT_UI:
+             if (len - i < IP6SOPT_UI_MINLEN) {
+		printf(", ui: trunc");
+		goto trunc;
+	    }
+            printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
+	    break;
+        case IP6SOPT_ALTCOA:
+             if (len - i < IP6SOPT_ALTCOA_MINLEN) {
+		printf(", altcoa: trunc");
+		goto trunc;
+	    }
+            printf(", alt-CoA: %s", ip6addr_string(&bp[i+2]));
+	    break;
+        case IP6SOPT_AUTH:
+             if (len - i < IP6SOPT_AUTH_MINLEN) {
+		printf(", auth: trunc");
+		goto trunc;
+	    }
+            printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2]));
+	    break;
+	default:
+	    if (len - i < IP6OPT_MINLEN) {
+		printf(", sopt_type %d: trunc)", bp[i]);
+		goto trunc;
+	    }
+	    printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]);
+	    break;
+	}
+    }
+    return;
+
+trunc:
+    printf("[trunc] ");
+}
+
+void
+ip6_opt_print(const u_char *bp, int len)
+{
+    int i;
+    int optlen = 0;
+
+    for (i = 0; i < len; i += optlen) {
+	if (bp[i] == IP6OPT_PAD1)
 	    optlen = 1;
+	else {
+	    if (i + 1 < len)
+		optlen = bp[i + 1] + 2;
+	    else
+		goto trunc;
+	}
+	if (i + optlen > len)
+	    goto trunc;
+
+	switch (bp[i]) {
+	case IP6OPT_PAD1:
+            printf("(pad1)");
 	    break;
-#ifndef IP6OPT_PADN
-#define IP6OPT_PADN	0x01
-#endif
 	case IP6OPT_PADN:
-#ifndef IP6OPT_MINLEN
-#define IP6OPT_MINLEN	2
-#endif
 	    if (len - i < IP6OPT_MINLEN) {
 		printf("(padn: trunc)");
 		goto trunc;
 	    }
-	    optlen = bp[i + 1] + 2;
+            printf("(padn)");
 	    break;
-#ifndef IP6OPT_RTALERT
-#define IP6OPT_RTALERT	0x05
-#endif
-	case IP6OPT_RTALERT:
-#ifndef IP6OPT_RTALERT_LEN
-#define IP6OPT_RTALERT_LEN	4
-#endif
+	case IP6OPT_ROUTER_ALERT:
 	    if (len - i < IP6OPT_RTALERT_LEN) {
 		printf("(rtalert: trunc)");
 		goto trunc;
@@ -92,16 +173,9 @@ ip6_opt_print(const u_char *bp, int len)
 		printf("(rtalert: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
-	    printf("(rtalert: 0x%04x) ", ntohs(*(u_int16_t *)&bp[i + 2]));
-	    optlen = IP6OPT_RTALERT_LEN;
+	    printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2]));
 	    break;
-#ifndef IP6OPT_JUMBO
-#define IP6OPT_JUMBO	0xC2
-#endif
 	case IP6OPT_JUMBO:
-#ifndef IP6OPT_JUMBO_LEN
-#define IP6OPT_JUMBO_LEN	6
-#endif
 	    if (len - i < IP6OPT_JUMBO_LEN) {
 		printf("(jumbo: trunc)");
 		goto trunc;
@@ -110,16 +184,94 @@ ip6_opt_print(const u_char *bp, int len)
 		printf("(jumbo: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
-	    printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int32_t *)&bp[i + 2]));
-	    optlen = IP6OPT_JUMBO_LEN;
+	    printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2]));
+	    break;
+        case IP6OPT_HOME_ADDRESS:
+	    if (len - i < IP6OPT_HOMEADDR_MINLEN) {
+		printf("(homeaddr: trunc)");
+		goto trunc;
+	    }
+	    if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
+		printf("(homeaddr: invalid len %d)", bp[i + 1]);
+		goto trunc;
+	    }
+	    printf("(homeaddr: %s", ip6addr_string(&bp[i + 2]));
+            if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
+		ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN],
+		    (optlen - IP6OPT_HOMEADDR_MINLEN));
+	    }
+            printf(")");
+	    break;
+        case IP6OPT_BINDING_UPDATE:
+	    if (len - i < IP6OPT_BU_MINLEN) {
+		printf("(bu: trunc)");
+		goto trunc;
+	    }
+	    if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) {
+		printf("(bu: invalid len %d)", bp[i + 1]);
+		goto trunc;
+	    }
+	    printf("(bu: ");
+	    if (bp[i + 2] & 0x80)
+		    printf("A");
+	    if (bp[i + 2] & 0x40)
+		    printf("H");
+	    if (bp[i + 2] & 0x20)
+		    printf("S");
+	    if (bp[i + 2] & 0x10)
+		    printf("D");
+	    if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4])
+		    printf("res");
+	    printf(", sequence: %u", bp[i + 5]);
+	    printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6]));
+
+	    if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
+		ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN],
+		    (optlen - IP6OPT_BU_MINLEN));
+	    }
+	    printf(")");
+	    break;
+	case IP6OPT_BINDING_ACK:
+	    if (len - i < IP6OPT_BA_MINLEN) {
+		printf("(ba: trunc)");
+		goto trunc;
+	    }
+	    if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) {
+		printf("(ba: invalid len %d)", bp[i + 1]);
+		goto trunc;
+	    }
+	    printf("(ba: ");
+	    printf("status: %u", bp[i + 2]);
+	    if (bp[i + 3])
+		    printf("res");
+	    printf(", sequence: %u", bp[i + 4]);
+	    printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5]));
+	    printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9]));
+
+	    if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
+		ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
+		    (optlen - IP6OPT_BA_MINLEN));
+	    }
+            printf(")");
+	    break;
+        case IP6OPT_BINDING_REQ:
+	    if (len - i < IP6OPT_BR_MINLEN) {
+		printf("(br: trunc)");
+		goto trunc;
+	    }
+            printf("(br");
+            if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) {
+		ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN],
+		    (optlen - IP6OPT_BR_MINLEN));
+	    }
+            printf(")");
 	    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;
+	    printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
 	    break;
 	}
     }
@@ -137,14 +289,11 @@ 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);
+    TCHECK2(*dp, hbhlen);
     printf("HBH ");
     if (vflag)
 	ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
@@ -153,21 +302,18 @@ hbhopt_print(register const u_char *bp)
 
   trunc:
     fputs("[|HBH]", stdout);
-    return(hbhlen);
+    return(-1);
 }
 
 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);
+    TCHECK2(*dp, dstoptlen);
     printf("DSTOPT ");
     if (vflag) {
 	ip6_opt_print((const u_char *)dp + sizeof(*dp),
@@ -178,6 +324,6 @@ dstopt_print(register const u_char *bp)
 
   trunc:
     fputs("[|DSTOPT]", stdout);
-    return(dstoptlen);
+    return(-1);
 }
 #endif /* INET6 */