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2e77679b0b
This fixes hangs during EC2 reboots (which are implemented by sending a ctrl-alt-del to the instance).
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
From f0c362873860526579bf9bda216005fd5a0936dd Mon Sep 17 00:00:00 2001
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From: Eelco Dolstra <eelco.dolstra@logicblox.com>
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Date: Mon, 4 Feb 2013 12:41:14 +0100
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Subject: [PATCH 7/9] Ignore IPv6 link-local addresses
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Returning IPv6 link-local addresses is a bad idea, because they only
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work if an application connects specifically over the corresponding
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interface. So you get errors like:
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$ curl -6 http://my-machine/
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curl: (7) Failed to connect to fe80::d6be:d9ff:fe1b:8477: Invalid argument
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To prevent this, this patch filters out link-local addresses. So if
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you don't have a routable IPv6 address, nss-myhostname will fall back
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to returning ::1.
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---
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src/nss-myhostname/netlink.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/src/nss-myhostname/netlink.c b/src/nss-myhostname/netlink.c
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index b1ef912..4f2ab5c 100644
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--- a/src/nss-myhostname/netlink.c
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+++ b/src/nss-myhostname/netlink.c
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@@ -113,6 +113,10 @@ static int read_reply(int fd, struct address **list, unsigned *n_list) {
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ifaddrmsg->ifa_scope == RT_SCOPE_NOWHERE)
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continue;
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+ if (ifaddrmsg->ifa_family == AF_INET6 &&
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+ ifaddrmsg->ifa_scope == RT_SCOPE_LINK)
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+ continue;
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+
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if (ifaddrmsg->ifa_flags & IFA_F_DEPRECATED)
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continue;
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--
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1.8.2.1
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