Prevent completely empty interface blocks.

This is meaningless in dhcpleased(8) and *not* needed to receive
leases for an interface. In fact dhcpleased(8) works just fine without
any configuration f

Prevent completely empty interface blocks.

This is meaningless in dhcpleased(8) and *not* needed to receive
leases for an interface. In fact dhcpleased(8) works just fine without
any configuration file at all.

man page diff & OK kn

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more sleepy florian knf issues

First stab at IPv6-only preferred from RFC8925.

This lets dhcpleased(8) request "IPv6-only preferred". If the
server replies with this option dhcpleased stops and does not request
a lease and deconf

First stab at IPv6-only preferred from RFC8925.

This lets dhcpleased(8) request "IPv6-only preferred". If the
server replies with this option dhcpleased stops and does not request
a lease and deconfigures IPv4 on the interface.

For now this is pretty much useless unless one dynamically configures
pf(4) to act as a CLAT. gelatod(8) from ports can help with this.

However, this helps me while hacking on a kernel based stateless CLAT
by moving dhcpleased out of the way while having an IPv6-mostly
network configured to compare behaviour with macOS.

Input jmc
OK phessler
Input & OK sthen

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default the conffile variable to the default file name instead of NULL.

this avoids having to test for NULL and swap the right name in place
in a bunch of places. it also avoids having NULL passed t

default the conffile variable to the default file name instead of NULL.

this avoids having to test for NULL and swap the right name in place
in a bunch of places. it also avoids having NULL passed to format
strings in the parser.

the only place where it actually matters if we're using the default
or not is when we're parsing the config. if you don't specify a
config, and the default file doesnt exist, that's ok.

ok florian@

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Make host name DHCP option configurable.
Diff from hagen@sdf.org, tweaks by me.
OK phessler
testing & OK bket

Don't declare variables as "unsigned char *" that are passed to
functions that take "char *" arguments. Where such chars are
assigned to int or passed to ctype functions, explicitly cast them
to uns

Don't declare variables as "unsigned char *" that are passed to
functions that take "char *" arguments. Where such chars are
assigned to int or passed to ctype functions, explicitly cast them
to unsigned char.

For OpenBSD's clang, -Wpointer-sign has been disabled by default,
but when the parse.y code was built elsewhere, the compiler would
complain.

With help from millert@
ok benno@ deraadt@

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According to RFC 2132 (9.14. Client identifier) a hardware type of 0
should be used when the client identifier is not a hardware address,
for example if it's just a string. It turns out that the majo

According to RFC 2132 (9.14. Client identifier) a hardware type of 0
should be used when the client identifier is not a hardware address,
for example if it's just a string. It turns out that the majority of
dhcp clients (and possibly servers?) does not do this but rather
transmits the client identifier verbatim if a string is
configured. The first character becomes the hardware type.
Make dhcpleased(8) behave the same.
Difference in behavior with dhclient(8) and interoperability issues
with dhcp(8) first pointed out by Olivier Cherrier on misc@
OK sthen
fine to get it in for 7.0 deraadt

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Make it possible to ignore routes or nameservers from a lease as well
as ignoring servers entirely.
Tested by bket
Parser looks reasonable to benno
man page OK jmc

'{' and '}' are fixed parts of the 'interface' decleration', not optional.
concern raised by kn.
ok florian

Implement possibility to send vendor class identifier (option 60) and
client identifier (option 61). Some dhcp servers expect these options
and refuse to hand out a lease without them.
Need for vendo

Implement possibility to send vendor class identifier (option 60) and
client identifier (option 61). Some dhcp servers expect these options
and refuse to hand out a lease without them.
Need for vendor class identifier pointed out & tested by bket
Need for client identifier pointed out by sthen
Input & reads OK sthen (as part of a larger diff)
OK kn (as part of a larger diff)

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