X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/860edc72fde4104f1abc8779bd3397a17859b6c8..47fc89d711eec0a073d9b3b293a1af901b5bd791:/print-babel.c

diff --git a/print-babel.c b/print-babel.c
index 58faca15..4f128b32 100644
--- a/print-babel.c
+++ b/print-babel.c
@@ -39,6 +39,8 @@
 #include "interface.h"
 #include "extract.h"
 
+static const char tstr[] = "[|babel]";
+
 static void babel_print_v2(const u_char *cp, u_int length);
 
 void
@@ -66,7 +68,7 @@ babel_print(const u_char *cp, u_int length) {
     return;
 
  trunc:
-    printf(" [|babel]");
+    printf(" %s", tstr);
     return;
 }
 
@@ -88,10 +90,10 @@ babel_print(const u_char *cp, u_int length) {
 /* sub-TLVs */
 #define MESSAGE_SUB_PAD1 0
 #define MESSAGE_SUB_PADN 1
-#define MESSAGE_SUB_CHANINFO 2
+#define MESSAGE_SUB_DIVERSITY 2
 
-/* ChanInfo sub-TLV channel codes */
-static const struct tok chaninfo_str[] = {
+/* Diversity sub-TLV channel codes */
+static const struct tok diversity_str[] = {
     { 0,   "reserved" },
     { 255, "all"      },
     { 0, NULL }
@@ -139,6 +141,23 @@ format_address(const u_char *prefix)
 #endif
 }
 
+static const char *
+format_interval(const u_int16_t i)
+{
+    static char buf[sizeof("0000.0s")];
+
+    if (i == 0)
+        return "0.0s (bogus)";
+    snprintf(buf, sizeof(buf), "%u.%us", i / 10, i % 10);
+    return buf;
+}
+
+static const char *
+format_interval_update(const u_int16_t i)
+{
+    return i == 0xFFFF ? "infinity" : format_interval(i);
+}
+
 /* Return number of octets consumed from the input buffer (not the prefix length
  * in bytes), or -1 for encoding error. */
 static int
@@ -220,7 +239,7 @@ network_address(int ae, const unsigned char *a, unsigned int len,
  *
  * o Type 0 stands for Pad1 sub-TLV with the same encoding as the Pad1 TLV.
  * o Type 1 stands for PadN sub-TLV with the same encoding as the PadN TLV.
- * o Type 2 stands for ChanInfo sub-TLV, which propagates diversity routing
+ * o Type 2 stands for Diversity sub-TLV, which propagates diversity routing
  *   data. Its body is a variable-length sequence of 8-bit unsigned integers,
  *   each representing per-hop number of interferring radio channel for the
  *   prefix. Channel 0 is invalid and must not be used in the sub-TLV, channel
@@ -228,7 +247,7 @@ network_address(int ae, const unsigned char *a, unsigned int len,
  *
  * Sub-TLV types 0 and 1 are valid for any TLV type, whether sub-TLV type 2 is
  * only valid for TLV type 8 (Update). Note that within an Update TLV a missing
- * ChanInfo sub-TLV is not the same as a ChanInfo sub-TLV with an empty body.
+ * Diversity sub-TLV is not the same as a Diversity sub-TLV with an empty body.
  * The former would mean a lack of any claims about the interference, and the
  * latter would state that interference is definitely absent. */
 static void
@@ -253,15 +272,15 @@ subtlvs_print(const u_char *cp, const u_char *ep, const uint8_t tlv_type) {
             printf(" sub-padn");
             cp += sublen;
             break;
-        case MESSAGE_SUB_CHANINFO:
-            printf(" sub-chaninfo");
+        case MESSAGE_SUB_DIVERSITY:
+            printf(" sub-diversity");
             if (sublen == 0) {
                 printf(" empty");
                 break;
             }
             sep = " ";
             while(sublen--) {
-                printf("%s%s", sep, tok2str(chaninfo_str, "%u", *cp++));
+                printf("%s%s", sep, tok2str(diversity_str, "%u", *cp++));
                 sep = "-";
             }
             if(tlv_type != MESSAGE_UPDATE)
@@ -335,7 +354,7 @@ babel_print_v2(const u_char *cp, u_int length) {
                 if(len < 6) goto corrupt;
                 nonce = EXTRACT_16BITS(message + 4);
                 interval = EXTRACT_16BITS(message + 6);
-                printf("%04x %d", nonce, interval);
+                printf("%04x %s", nonce, format_interval(interval));
             }
         }
             break;
@@ -362,7 +381,7 @@ babel_print_v2(const u_char *cp, u_int length) {
                 if(len < 6) goto corrupt;
                 seqno = EXTRACT_16BITS(message + 4);
                 interval = EXTRACT_16BITS(message + 6);
-                printf("seqno %u interval %u", seqno, interval);
+                printf("seqno %u interval %s", seqno, format_interval(interval));
             }
         }
             break;
@@ -379,9 +398,9 @@ babel_print_v2(const u_char *cp, u_int length) {
                 txcost = EXTRACT_16BITS(message + 4);
                 interval = EXTRACT_16BITS(message + 6);
                 rc = network_address(message[2], message + 8, len - 6, address);
-                if(rc < 0) { printf("[|babel]"); break; }
-                printf("%s txcost %u interval %d",
-                       format_address(address), txcost, interval);
+                if(rc < 0) { printf("%s", tstr); break; }
+                printf("%s txcost %u interval %s",
+                       format_address(address), txcost, format_interval(interval));
             }
         }
             break;
@@ -438,12 +457,12 @@ babel_print_v2(const u_char *cp, u_int length) {
                 interval = EXTRACT_16BITS(message + 6);
                 seqno = EXTRACT_16BITS(message + 8);
                 metric = EXTRACT_16BITS(message + 10);
-                printf("%s%s%s %s metric %u seqno %u interval %u",
+                printf("%s%s%s %s metric %u seqno %u interval %s",
                        (message[3] & 0x80) ? "/prefix": "",
                        (message[3] & 0x40) ? "/id" : "",
                        (message[3] & 0x3f) ? "/unknown" : "",
                        format_prefix(prefix, plen),
-                       metric, seqno, interval);
+                       metric, seqno, format_interval_update(interval));
                 if(message[3] & 0x80) {
                     if(message[2] == 1)
                         memcpy(v4_prefix, prefix, 16);
@@ -451,7 +470,7 @@ babel_print_v2(const u_char *cp, u_int length) {
                         memcpy(v6_prefix, prefix, 16);
                 }
                 /* extra data? */
-                if(rc < len - 10)
+                if((u_int)rc < len - 10)
                     subtlvs_print(message + 12 + rc, message + 2 + len, type);
             }
         }
@@ -530,7 +549,7 @@ babel_print_v2(const u_char *cp, u_int length) {
     return;
 
  trunc:
-    printf(" [|babel]");
+    printf(" %s", tstr);
     return;
 
  corrupt: