Blame SOURCES/arpwatch-zero-source-ip.patch
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--- a/arpwatch.c 2017-03-22 08:44:22.095722636 +0100
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+++ b/arpwatch.c 2017-03-22 09:11:08.119515745 +0100
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@@ -123,6 +123,7 @@ struct nets {
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static struct nets *nets;
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static int nets_ind;
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static int nets_size;
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+static int ignore_zero_net;
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extern int optind;
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extern int opterr;
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@@ -477,6 +478,11 @@ process_ether(register u_char *u, regist
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/* Source ip address */
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BCOPY(SPA(ea), &sia, 4);
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+ if (sia == 0 && ignore_zero_net) {
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+ syslog(LOG_DEBUG, "ignoring packet from 0.0.0.0");
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+ return;
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+ }
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+
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/* Watch for bogons */
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if (isbogon(sia)) {
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dosyslog(LOG_INFO, "bogon", sia, sea, sha);
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@@ -802,6 +808,9 @@ addnet(register const char *str)
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np->netmask = m;
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++nets_ind;
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+ if (n == 0)
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+ ignore_zero_net = 1;
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+
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return (1);
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}
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