Flushing foreign configuration for unmanaged interfaces is outright
evil, especially when it's a regular occurence with Wi-Fi.
Fixes: 3104883ddc "networkd: remove route if carrier is lost"
Ref: #3831
Not every link has kind associated with it.
(gdb) r
Starting program: /home/sus/tt/systemd/systemd-networkd
Missing separate debuginfos, use: dnf debuginfo-install
glibc-2.23.1-7.fc24.x86_64
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
vboxnet0: Gained IPv6LL
wlp3s0: Gained IPv6LL
enp0s25: Gained IPv6LL
Enumeration completed
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6e27ade in __strcmp_sse2_unaligned () from /lib64/libc.so.6
(gdb) bt
src/network/networkd-link.c:2008
src/network/networkd-link.c:2059
src/network/networkd-link.c:2442
m=0x555555704a30, userdata=0x55555570bfe0) at src/network/networkd-link.c:2497
at src/libsystemd/sd-netlink/sd-netlink.c:347
src/libsystemd/sd-netlink/sd-netlink.c:402
src/libsystemd/sd-netlink/sd-netlink.c:432
userdata=0x5555556f7470) at src/libsystemd/sd-netlink/sd-netlink.c:739
src/libsystemd/sd-event/sd-event.c:2275
src/libsystemd/sd-event/sd-event.c:2626
timeout=18446744073709551615) at src/libsystemd/sd-event/sd-event.c:2685
bus=0x5555556f9af0, name=0x555555692315 "org.freedesktop.network1",
timeout=30000000,
check_idle=0x55555556ac84 <manager_check_idle>, userdata=0x5555556f6b20) at
src/shared/bus-util.c:134
src/network/networkd-manager.c:1128
src/network/networkd.c:127
(gdb) f 1
src/network/networkd-link.c:2008
2008 if (link->network->bridge || streq("bridge", link->kind)) {
(gdb) p link->kind
$1 = 0x0
This reworks sd-ndisc and networkd substantially to support IPv6 RA much more
comprehensively. Since the API is extended quite a bit networkd has been ported
over too, and the patch is not as straight-forward as one could wish. The
rework includes:
- Support for DNSSL, RDNSS and RA routing options in sd-ndisc and networkd. Two
new configuration options have been added to networkd to make this
configurable.
- sd-ndisc now exposes an sd_ndisc_router object that encapsulates a full RA
message, and has direct, friendly acessor functions for the singleton RA
properties, as well as an iterative interface to iterate through known and
unsupported options. The router object may either be retrieved from the wire,
or generated from raw data. In many ways the sd-ndisc API now matches the
sd-lldp API, except that no implicit database of seen data is kept. (Note
that sd-ndisc actually had a half-written, but unused implementaiton of such
a store, which is removed now.)
- sd-ndisc will now collect the reception timestamps of RA, which is useful to
make sd_ndisc_router fully descriptive of what it covers.
Fixes: #1079
Let's make sd-lldp a bit more like sd-ndisc ant the other APIs, and add proper
ref counting and a separate call for setting the ifindex.
This also adds a new lldp_reset() call we can use at various places to close
all fds. This is also similar to how sd-ndisc already does it.
We generally only use "const" to constify the destination of pointers, but not
the pointers themselves, as they are copied anyway during C function
invocation. Hence, drop this usage of "const".
dhcp6_request_address() was merely a function to switch the DHCPv6 client from "stateless" mode to "stateful" mode. It was also a one-way switch. Also, to (re)start the client, we would need to repeat separate function calls.
In this patch, dhcp6_request_address() is made a general starter/manager of the DHCPv6 client. It now takes an extra parameter so we will be specifying which mode the DHCPv6 client should be started in. Also it will keep track of the current mode and compare with the newly requested mode, and only restart the client in case there is a difference between them.
This also makes sure that the DHCPv6 client will be (re)started accordingly as per the Router Advertisement flags.
DHCPv6 requires an IPv6 link-local address to work. The client will not be started (even when enabled explicitly with `DHCP=`) if none is configured (either by autoconfiguration or manually). Therefore, disable IPv6 in such case.
Although networkd has option (LinkLocalAddressing=) to toggle IPv6LL autoconfiguration, when it is enabled, the address is autoconfigured by the kernel, but not networkd.
Therefore, we do not statically set IFLA_INET6_ADDR_GEN_MODE to IN6_ADDR_GEN_MODE_EUI64, but dynamically depending on whether stable_secret is set, just as what the kernel does by default.
Note that this does NOT affect the global addresses configured by networkd.
This is partial fix for #2228 and #2977, #3204.
bridge-test: netdev ready
docker0: Gained IPv6LL
wlan0: Gained IPv6LL
eth0: Gained IPv6LL
Enumeration completed
bridge-test: netdev exists, using existing without changing its
parameters
vboxnet0: IPv6 enabled for interface: Success
lo: Configured
docker0: Could not drop address: No such process
vboxnet0: Gained carrier
wlan0: Could not drop address: No such process
eth0: Could not drop address: No such process
eth0: Could not drop address: No such process
eth0: Could not drop address: No such process
vboxnet0: Gained IPv6LL
vboxnet0: Could not set NDisc route or address: Invalid argument
vboxnet0: Failed
[New Thread 0x7ffff6505700 (LWP 1111)]
[Thread 0x7ffff6505700 (LWP 1111) exited]
Assertion 'link->state == LINK_STATE_SETTING_ROUTES' failed at
src/network/networkd-link.c:672, function link_enter_configured().
Aborting.
Program received signal SIGABRT, Aborted.
0x00007ffff6dc6a98 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: dnf debuginfo-install
iptables-1.4.21-15.fc23.x86_64 libattr-2.4.47-14.fc23.x86_64
libidn-1.32-1.fc23.x86_64 pcre-8.38-7.fc23.x86_64
Debugging
(gdb) bt
"link->state == LINK_STATE_SETTING_ROUTES", file=0x5555556a34c8
"src/network/networkd-link.c", line=672,
func=0x5555556a56d0 <__PRETTY_FUNCTION__.14850>
"link_enter_configured") at src/basic/log.c:788
src/network/networkd-link.c:672
src/network/networkd-link.c:720
flags=0 '\000', scope=0 '\000', cinfo=0x7fffffffe020) at
src/network/networkd-address.c:344
(rtnl=0x5555556eded0, message=0x55555570ff20, userdata=0x5555556ec590)
at src/network/networkd-manager.c:604
m=0x55555570ff20) at src/libsystemd/sd-netlink/sd-netlink.c:365
at src/libsystemd/sd-netlink/sd-netlink.c:395
ret=0x0) at src/libsystemd/sd-netlink/sd-netlink.c:429
revents=1, userdata=0x5555556eded0) at
src/libsystemd/sd-netlink/sd-netlink.c:723
src/libsystemd/sd-event/sd-event.c:2268
src/libsystemd/sd-event/sd-event.c:2629
timeout=18446744073709551615) at src/libsystemd/sd-event/sd-event.c:2688
bus=0x5555556eeba0, name=0x55555568a2f5 "org.freedesktop.network1",
timeout=30000000,
check_idle=0x55555556adb6 <manager_check_idle>,
userdata=0x5555556ec590) at src/shared/bus-util.c:134
src/network/networkd-manager.c:1130
src/network/networkd.c:127
(gdb) f 3
src/network/networkd-link.c:672
672 assert(link->state == LINK_STATE_SETTING_ROUTES);
(gdb) p link->state
$1 = LINK_STATE_FAILED
We should not be in this state .
even if vboxnet0 failed we went into this state.
vboxnet0: Could not set NDisc route or address: Invalid argument
vboxnet0: Failed
Add an option to disable appending DHCP option 3 (Router) to the DHCP
OFFER and ACK packets.
This commit adds the boolean option EmitRouter= for the [DHCPServer]
section in .network files.
Rationale: On embedded devices, it is very useful to have a DHCP server
running on an USB OTG ethernet gadget interface to avoid manual setup on
the client PCs, but it should only serve IP addresses, no route(r)s.
Otherwise, Windows clients experience network connectivity issues, due
to them using the address set in DHCP option 3 as default gateway.
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
This allows selecting the propagation level of emitted LLDP packets
(specifically: the destination MAC address of the packets). This is useful
because it allows generating LLDP packets that optionally cross certain types
of bridges.
See 802.11ab-2009, Table 7-1 for details.
Separate fields are replaced with a struct.
Second second duid type field is removed. The first field was used to carry
the result of DUIDType= configuration, and the second was either a copy of
this, or contained the type extracted from DuidRawData. The semantics are changed
so that the type specified in DUIDType is always used. DUIDRawData= no longer
overrides the type setting.
The networkd code is now more constrained than the sd-dhcp code:
DUIDRawData cannot have 0 length, length 0 is treated the same as unsetting.
Likewise, it is not possible to set a DUIDType=0. If it ever becomes necessary
to set type=0 or a zero-length duid, the code can be changed to support that.
Nevertheless, I think that's unlikely.
This addresses #3127 § 1 and 3.
v2:
- rename DUID.duid, DUID.duid_len to DUID.raw_data, DUID.raw_data_len
Header files were organized in a way where the includer would add various
typedefs used by the includee before including it, resulting in a tangled
web of dependencies between files.
Replace this with the following logic:
networkd.h
/ \
networkd-link.h \
networkd-ipv4ll.h--\__\
networkd-fdb.h \
networkd-network.h netword-netdev-*.h
networkd-route.h \
networkd-netdev.h
If a pointer to a structure defined in a different header file is needed,
use a typedef line instead of including the whole header.
If we not marking manager dirty when link is dirty then
the state file is not updated. This is a side effect of
issue 2850
setting CriticalConnection=yes
timesyncd NTP servers given by DHCP server are ignored.
IPv6 protocol requires a minimum MTU of 1280 bytes on the interface.
This fixes#3046.
Introduce helper link_ipv6_enabled() to figure out whether IPV6 is enabled.
Introduce network_has_static_ipv6_addresses() to find out if any static
ipv6 address configured.
If IPv6 is not configured on any interface that is SLAAC, DHCPv6 and static
IPv6 addresses not configured, then IPv6 will be automatically disabled for that
interface, that is we write "1" to /proc/sys/net/ipv6/conf//disable_ipv6.
lldp.h contains definitions of LLDP types, subtypes and capabilities which
should be exposed in public headers. Get rid of the file and move those
definitions to sd-lldp.h with the SD_ prefix.
Throughout the tree there's spurious use of spaces separating ++ and --
operators from their respective operands. Make ++ and -- operator
consistent with the majority of existing uses; discard the spaces.
Instead of just notifying about the fact that something changed in the
database, actually inform the callback what precisely changed. This is useful,
so that the LLDP tx logic can be put into "fast" mode as soon as a previously
unknown peer appears, as suggested by the LLDP spec.
Let's add some minimalistic LLDP sender support. The idea is that this is
either on or off, and all fields determined automatically rather than
configured explicitly.
