From: Andrei Vagin <ava...@virtuozzo.com>
nl_pktinfo control messages is used to get the extended
destination group number.
Signed-off-by: Andrei Vagin <ava...@virtuozzo.com>
---
criu/sk-queue.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/criu/sk-queue.c b/criu/sk-queue.c
index 88e47b8..8124f75 100644
--- a/criu/sk-queue.c
+++ b/criu/sk-queue.c
@@ -10,6 +10,7 @@
#include <sys/socket.h>
#include <sys/sendfile.h>
#include <linux/socket.h>
+#include <linux/netlink.h>
#include "common/list.h"
#include "imgset.h"
@@ -127,6 +128,18 @@ static int dump_packet_cmsg(struct msghdr *mh,
SkPacketEntry *pe, int flags)
return -1;
continue;
}
+ if (ch->cmsg_level == SOL_NETLINK &&
+ ch->cmsg_type == NETLINK_PKTINFO &&
+ ch->cmsg_len == CMSG_LEN(sizeof(struct nl_pktinfo))) {
+ struct nl_pktinfo *info = CMSG_DATA(ch);
+
+ /* Groups less than 32 are returned in msg_address */
+ if (info->group < 32)
+ continue;
+
+ pr_err("A sender group %d isn't supported\n",
info->group);
+ return -1;
+ }
pr_err("cmsg: len %ld type %d level %d\n",
ch->cmsg_len, ch->cmsg_type, ch->cmsg_level);
pr_err("Control messages in queue, not supported\n");
--
1.8.3.1
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