better print the IP addresses native than using getname();

[tcpdump] / util.c

diff --git a/util.c b/util.c
index 558f2fbfb27baeb883fb33cb87487e78b640bcbf..3c396a2399c2619b140dee1ae62f911f4e60b4bb 100644 (file)
--- a/util.c
+++ b/util.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/util.c,v 1.69 2000-07-11 00:49:03 assar Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/util.c,v 1.76 2002-07-18 00:04:12 hannes Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -145,7 +145,7 @@ ts_print(register const struct timeval *tvp)
                } else {
                        int d_usec = tvp->tv_usec - b_usec;
                        int d_sec = tvp->tv_sec - b_sec;
-                       
+
                        while (d_usec < 0) {
                                d_usec += 1000000;
                                d_sec--;
@@ -178,15 +178,19 @@ ts_print(register const struct timeval *tvp)
 void
 relts_print(int secs)
 {
-       static char *lengths[] = {"y", "w", "d", "h", "m", "s"};
-       static int seconds[] = {31536000, 604800, 86400, 3600, 60, 1};
-       char **l = lengths;
-       int *s = seconds;
+       static const char *lengths[] = {"y", "w", "d", "h", "m", "s"};
+       static const int seconds[] = {31536000, 604800, 86400, 3600, 60, 1};
+       const char **l = lengths;
+       const int *s = seconds;
 
-       if (secs <= 0) {
+       if (secs == 0) {
                (void)printf("0s");
                return;
        }
+       if (secs < 0) {
+               (void)printf("-");
+               secs = -secs;
+       }
        while (secs > 0) {
                if (secs >= *s) {
                        (void)printf("%d%s", secs / *s, *l);
@@ -197,6 +201,34 @@ relts_print(int secs)
        }
 }
 
+/*
+ *  this is a generic routine for printing unknown data;
+ *  we pass on the linefeed plus indentation string to
+ *  get a proper output - returns 0 on error
+ */
+
+int
+print_unknown_data(const u_char *cp,const char *lf,int len)
+{
+        int i;
+
+       printf("%s0x0000: ",lf);
+       for(i=0;i<len;i++) {
+           if (!TTEST2(*(cp+i), 1)) {
+              printf("%spacket exceeded snapshot",lf);
+              return(0);
+            }
+           printf("%02x",*(cp+i));
+           if (i%2)
+               printf(" ");
+           if (i/16!=(i+1)/16) {
+               if (i<(len-1))
+                   printf("%s0x%04x: ",lf,i);
+           }
+       }
+       return(1); /* everything is ok */
+}
+
 /*
  * Convert a token value to a string; use "fmt" if not found.
  */
@@ -217,6 +249,25 @@ tok2str(register const struct tok *lp, register const char *fmt,
        return (buf);
 }
 
+/*
+ * Convert a value to a string using an array; the macro
+ * tok2strary() in <interface.h> is the public interface to
+ * this function and ensures that the second argument is
+ * correct for bounds-checking.
+ */
+const char *
+tok2strary_internal(register const char **lp, int n, register const char *fmt,
+       register int v)
+{
+       static char buf[128];
+
+       if (v >= 0 && v < n && lp[v] != NULL)
+               return lp[v];
+       if (fmt == NULL)
+               fmt = "#%d";
+       (void)snprintf(buf, sizeof(buf), fmt, v);
+       return (buf);
+}
 
 /* VARARGS */
 void
@@ -303,7 +354,10 @@ read_infile(char *fname)
                error("can't stat %s: %s", fname, pcap_strerror(errno));
 
        cp = malloc((u_int)buf.st_size + 1);
-       cc = read(fd, cp, (int)buf.st_size);
+       if (cp == NULL)
+               error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
+                       fname, pcap_strerror(errno));
+       cc = read(fd, cp, (u_int)buf.st_size);
        if (cc < 0)
                error("read %s: %s", fname, pcap_strerror(errno));
        if (cc != buf.st_size)
@@ -328,8 +382,8 @@ safeputchar(int c)
        unsigned char ch;
 
        ch = (unsigned char)(c & 0xff);
-       if (c < 0x80 && isprint(c))
-               printf("%c", c & 0xff);
+       if (ch < 0x80 && isprint(ch))
+               printf("%c", ch);
        else
-               printf("\\%03o", c & 0xff);
+               printf("\\%03o", ch);
 }