With these patches applied, networkd is successfully able to get an
address from a DHCP server on an IPoIB interface.
1)
Makes networkd pass the actual interface type to the dhcp client,
instead of hardcoding it to Ethernet.
2)
Fixes some issues in handling the larger (20 Byte) IB MAC addresses in
the dhcp code.
3)
Add a new field to networkds Link struct, which holds the interface
broadcast address.
3.1)
Modify the DHCP code to also expect the broadcast address as parameter.
On an Ethernet-Interface the Broadcast address never changes and is always
all 6 bytes set to 0xFF.
On an IB one however it is not neccesarily always the same, thus
fetching the actual address from the interface is neccesary.
4)
Only the last 8 bytes of an IB MAC are stable, so when using an IB MAC to
generate a client ID, only pass those 8 bytes.
This effectively reverts the commit 22fc2420b2.
The function `asynchronous_close()` confuses valgrind. Before this commit,
valgrind may report the following:
```
HEAP SUMMARY:
in use at exit: 384 bytes in 1 blocks
total heap usage: 4,787 allocs, 4,786 frees, 1,379,191 bytes allocated
384 bytes in 1 blocks are possibly lost in loss record 1 of 1
at 0x483CAE9: calloc (vg_replace_malloc.c:760)
by 0x401456A: _dl_allocate_tls (in /usr/lib64/ld-2.31.so)
by 0x4BD212E: pthread_create@@GLIBC_2.2.5 (in /usr/lib64/libpthread-2.31.so)
by 0x499B662: asynchronous_job (async.c:47)
by 0x499B7DC: asynchronous_close (async.c:102)
by 0x4CFA8B: client_initialize (sd-dhcp-client.c:696)
by 0x4CFC5E: client_stop (sd-dhcp-client.c:725)
by 0x4D4589: sd_dhcp_client_stop (sd-dhcp-client.c:2134)
by 0x493C2F: link_stop_clients (networkd-link.c:620)
by 0x4126DB: manager_free (networkd-manager.c:867)
by 0x40D193: manager_freep (networkd-manager.h:97)
by 0x40DAFC: run (networkd.c:20)
LEAK SUMMARY:
definitely lost: 0 bytes in 0 blocks
indirectly lost: 0 bytes in 0 blocks
possibly lost: 384 bytes in 1 blocks
still reachable: 0 bytes in 0 blocks
suppressed: 0 bytes in 0 blocks
For lists of detected and suppressed errors, rerun with: -s
ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
```
SD_DHCP6_OPTION_IA_NA does not exist in DHCP6_ADVERTISE packet if DHCP server only provides prefix delegation. So the attempt to send the DHCP6_REQUEST packet fails on r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); forever.
Similar to free_and_replace. I think this should be uppercase to make it
clear that this is a macro. free_and_replace should probably be uppercased
too.
This really doesn't matter given that AF_xyz and PF_xyz are equivalent
in all ways, but we almost always use AF_xyz, hence stick to it
universally and convert the remaining PF_ to AF_
When a prefix is delegated to an interface that is already sending
RAs, send an RA immediately to inform clients of the new prefix.
This allows them to start using it immediately instead of waiting
up to nearly 10 minutes (depending on when the last timed RA was
sent). This type of situation might occur if, for example, an
outage of the WAN connection caused the addresses and prefixes to
be lost and later regained after service was restored. The
condition for the number of RAs sent being above 0 simultaneously
ensures that RADV is already running and that this code doesn't
send any RAs before the timed RAs have started when the interface
first comes up.
To make Driver= in [Match] section work in containers.
Note that ID_NET_DRIVER= property in udev database is set with the
result of the ethtool. So, this should not change anything for
non-container cases.
Closes#15678.
Zbigniew Jędrzejewski-Szmek