30 lines
1.3 KiB
Diff
30 lines
1.3 KiB
Diff
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From 557d5e9fecff500b010a9be44dda1ae000f45039 Mon Sep 17 00:00:00 2001
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From: Matthias Greiner <magreiner@users.noreply.github.com>
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Date: Mon, 22 May 2017 03:11:25 +0200
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Subject: [PATCH] Allow bad MTU values with warning to be able to connect to
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the machine. (#5954)
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Ensure the MTU value is valid. Emit a warning and ignore otherwise.
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(cherry picked from commit 955d99edc7991386a36e3d33924cc584931fde91)
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---
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src/libsystemd-network/sd-dhcp-lease.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/src/libsystemd-network/sd-dhcp-lease.c b/src/libsystemd-network/sd-dhcp-lease.c
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index 7fed55c5fc..565ec4cbe4 100644
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--- a/src/libsystemd-network/sd-dhcp-lease.c
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+++ b/src/libsystemd-network/sd-dhcp-lease.c
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@@ -594,6 +594,11 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
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r = lease_parse_u16(option, len, &lease->mtu, 68);
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if (r < 0)
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log_debug_errno(r, "Failed to parse MTU, ignoring: %m");
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+ if (lease->mtu < DHCP_DEFAULT_MIN_SIZE) {
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+ log_warning("MTU value of %d too small. Using default MTU value of %d instead.", lease->mtu, DHCP_DEFAULT_MIN_SIZE);
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+ lease->mtu = DHCP_DEFAULT_MIN_SIZE;
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+ }
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+
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break;
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case SD_DHCP_OPTION_DOMAIN_NAME:
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