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| author | Matthias Greiner <magreiner@users.noreply.github.com> | 2017-05-22 03:11:25 +0200 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2017-05-21 21:11:25 -0400 |
| commit | 955d99edc7991386a36e3d33924cc584931fde91 (patch) | |
| tree | d85555c51b8617e2917662005fffd6aa448c66cf /src/libsystemd-network/sd-dhcp-lease.c | |
| parent | 7a093ea24662b060c59bef7194cac3ebd27f94df (diff) | |
| download | systemd-955d99edc7991386a36e3d33924cc584931fde91.tar.gz | |
Allow bad MTU values with warning to be able to connect to the machine. (#5954)
Ensure the MTU value is valid. Emit a warning and ignore otherwise.
Diffstat (limited to 'src/libsystemd-network/sd-dhcp-lease.c')
| -rw-r--r-- | src/libsystemd-network/sd-dhcp-lease.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libsystemd-network/sd-dhcp-lease.c b/src/libsystemd-network/sd-dhcp-lease.c index 5906151360..b4552aa35f 100644 --- a/src/libsystemd-network/sd-dhcp-lease.c +++ b/src/libsystemd-network/sd-dhcp-lease.c @@ -610,6 +610,11 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void r = lease_parse_u16(option, len, &lease->mtu, 68); if (r < 0) log_debug_errno(r, "Failed to parse MTU, ignoring: %m"); + if (lease->mtu < DHCP_DEFAULT_MIN_SIZE) { + log_warning("MTU value of %d too small. Using default MTU value of %d instead.", lease->mtu, DHCP_DEFAULT_MIN_SIZE); + lease->mtu = DHCP_DEFAULT_MIN_SIZE; + } + break; case SD_DHCP_OPTION_DOMAIN_NAME: |