Report ps_ifdrop if it's non-zero.

diff --git a/tcpdump.c b/tcpdump.c
index 26d1d80401ef28ea01b66ba1d2b5e7bb9bfb0922..18c7af4b60716cf8dd2ed21fbd290d26a460b7af 100644 (file)
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -1303,6 +1303,11 @@ info(register int verbose)
 {
        struct pcap_stat stat;
 
+       /*
+        * Older versions of libpcap didn't set ps_ifdrop on some
+        * platforms; initialize it to 0 to handle that.
+        */
+       stat.ps_ifdrop = 0;
        if (pcap_stats(pd, &stat) < 0) {
                (void)fprintf(stderr, "pcap_stats: %s\n", pcap_geterr(pd));
                infoprint = 0;
@@ -1322,7 +1327,16 @@ info(register int verbose)
                fputs(", ", stderr);
        else
                putc('\n', stderr);
-       (void)fprintf(stderr, "%u packets dropped by kernel\n", stat.ps_drop);
+       (void)fprintf(stderr, "%u packets dropped by kernel", stat.ps_drop);
+       if (stat.ps_ifdrop != 0) {
+               if (!verbose)
+                       fputs(", ", stderr);
+               else
+                       putc('\n', stderr);
+               (void)fprintf(stderr, "%u packets dropped by interface\n",
+                   stat.ps_ifdrop);
+       } else
+               putc('\n', stderr);
        infoprint = 0;
 }