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| author | Susant Sahani <ssahani@users.noreply.github.com> | 2016-05-23 14:43:57 +0530 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2016-05-23 11:13:57 +0200 |
| commit | 15fec93be37f12ef6c36a3e8f7dbb1984e1bcfe7 (patch) | |
| tree | 34247c666b2645f1bfb2518f1e9e6524cf8a3b92 | |
| parent | 4f9020fa10df674fcda82ec97f77e24e3c5b042e (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.c | 9 |
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; |