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-rw-r--r--sys/netinet/ip_mroute.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/netinet/ip_mroute.c b/sys/netinet/ip_mroute.c
index b6a9fca..62da7dd 100644
--- a/sys/netinet/ip_mroute.c
+++ b/sys/netinet/ip_mroute.c
@@ -13,6 +13,7 @@
*/
#include "opt_mrouting.h"
+#include "opt_random_ip_id.h"
#include <sys/param.h>
#include <sys/systm.h>
@@ -1581,7 +1582,11 @@ encap_send(ip, vifp, m)
*/
ip_copy = mtod(mb_copy, struct ip *);
*ip_copy = multicast_encap_iphdr;
+#ifdef RANDOM_IP_ID
+ ip_copy->ip_id = ip_randomid();
+#else
ip_copy->ip_id = htons(ip_id++);
+#endif
ip_copy->ip_len += len;
ip_copy->ip_src = vifp->v_lcl_addr;
ip_copy->ip_dst = vifp->v_rmt_addr;
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