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26 lines
1.1 KiB
Diff
26 lines
1.1 KiB
Diff
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From 4bb68866a8aeb31db8100492bceae051e33be5d0 Mon Sep 17 00:00:00 2001
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From: Simon Kelley <simon@thekelleys.org.uk>
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Date: Thu, 15 Jun 2017 23:18:44 +0100
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Subject: [PATCH] Tweak ICMP ping check logic for DHCPv4.
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---
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src/rfc2131.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/rfc2131.c b/src/rfc2131.c
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index 1c850e5..75792da 100644
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--- a/src/rfc2131.c
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+++ b/src/rfc2131.c
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@@ -1040,7 +1040,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
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else if (have_config(config, CONFIG_DECLINED) &&
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difftime(now, config->decline_time) < (float)DECLINE_BACKOFF)
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my_syslog(MS_DHCP | LOG_WARNING, _("not using configured address %s because it was previously declined"), addrs);
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- else if (!do_icmp_ping(now, config->addr, 0, loopback))
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+ else if ((!lease || lease->addr.s_addr != config->addr.s_addr) && !do_icmp_ping(now, config->addr, 0, loopback))
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my_syslog(MS_DHCP | LOG_WARNING, _("not using configured address %s because it is in use by another host"), addrs);
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else
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conf = config->addr;
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--
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1.9.1
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