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authorSusant Sahani <ssahani@users.noreply.github.com>2016-05-23 14:43:57 +0530
committerLennart Poettering <lennart@poettering.net>2016-05-23 11:13:57 +0200
commit15fec93be37f12ef6c36a3e8f7dbb1984e1bcfe7 (patch)
tree34247c666b2645f1bfb2518f1e9e6524cf8a3b92
parent4f9020fa10df674fcda82ec97f77e24e3c5b042e (diff)
networkd: networkd: ndisc set SO_BINDTODEVICE on socket (#3294)
From the issue #2004 we are receiving packet even if this packet is not intended for this interface. This can be reproduced. lp3s0: Updating address: 2001:db8:1:0:7e7a:91ff:fe6d:ffe2/64 (valid for 1d) wlp3s0: Updating address: fe80::7e7a:91ff:fe6d:ffe2/64 (valid forever) NDisc CLIENT: Received RA from non-link-local address ::. Ignoring. NDisc CLIENT: Received RA on wrong interface: 2 != 6. Ignoring. NDisc CLIENT: Received RA on wrong interface: 2 != 3. Ignoring. enp0s25: Updating address: 2001:db8:1:0:2ad2:44ff:fe6a:ae07/64 (valid for 1d) enp0s25: Updating address: fe80::2ad2:44ff:fe6a:ae07/64 (valid forever) NDisc CLIENT: Sent Router Solicitation NDisc CLIENT: Sent Router Solicitation NDisc CLIENT: Sent Router Solicitation NDisc CLIENT: Received RA on wrong interface: 3 != 2. Ignoring. NDisc CLIENT: Received RA on wrong interface: 3 != 6. Ignoring. NDisc CLIENT: Received RA from non-link-local address ::. Ignoring. NDisc CLIENT: Received RA on wrong interface: 2 != 6. Ignoring. NDisc CLIENT: Received RA on wrong interface: 2 != 3. Ignoring. enp0s25: Updating address: 2001:db8:1:0:2ad2:44ff:fe6a:ae07/64 (valid for 1d) enp0s25: Updating address: fe80::2ad2:44ff:fe6a:ae07/64 (valid forever) Add SO_BINDTODEVICE to socket fixes #2004
-rw-r--r--src/libsystemd-network/icmp6-util.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/libsystemd-network/icmp6-util.c b/src/libsystemd-network/icmp6-util.c
index acad9d7d6a..d81e9ebd88 100644
--- a/src/libsystemd-network/icmp6-util.c
+++ b/src/libsystemd-network/icmp6-util.c
@@ -26,6 +26,7 @@
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
+#include <net/if.h>
#include <linux/if_packet.h>
#include "fd-util.h"
@@ -47,6 +48,7 @@ int icmp6_bind_router_solicitation(int index) {
.ipv6mr_interface = index,
};
_cleanup_close_ int s = -1;
+ char ifname[IF_NAMESIZE] = "";
int r, zero = 0, one = 1, hops = 255;
s = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_ICMPV6);
@@ -83,6 +85,13 @@ int icmp6_bind_router_solicitation(int index) {
if (r < 0)
return -errno;
+ if (if_indextoname(index, ifname) == 0)
+ return -errno;
+
+ r = setsockopt(s, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen(ifname));
+ if (r < 0)
+ return -errno;
+
r = s;
s = -1;
return r;