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Add "known-othernet" DHCP tag.

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This commit is contained in:
Simon Kelley
2017-04-30 18:21:31 +01:00
parent efff74c1ae
commit b2a9c571eb
4 changed files with 22 additions and 1 deletions
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5
CHANGELOG
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@@ -110,6 +110,11 @@ version 2.77
an address in configured locally. Thanks to Alin Năstac
for spotting the problem.
Add new DHCP tag "known-othernet" which is set when only a
dhcp-host exists for another subnet. Can be used to ensure
that privileged hosts are not given "guest" addresses by
accident. Thanks to Todd Sanket for the suggestion.
version 2.76
Include 0.0.0.0/8 in DNS rebind checks. This range

2
man/dnsmasq.8
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@@ -1021,6 +1021,8 @@ dhcp-host directive (or one implied by /etc/ethers) then the special
tag "known" is set. This allows dnsmasq to be configured to
ignore requests from unknown machines using
.B --dhcp-ignore=tag:!known
If the host matches only a dhcp-host directive which cannot
be used because it specifies an address on different subnet, the tag "known-othernet" is set.
Ethernet addresses (but not client-ids) may have
wildcard bytes, so for example
.B --dhcp-host=00:20:e0:3b:13:*,ignore

7
src/rfc2131.c
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@@ -487,6 +487,13 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
known_id.next = netid;
netid = &known_id;
}
else if (find_config(daemon->dhcp_conf, NULL, clid, clid_len,
mess->chaddr, mess->hlen, mess->htype, NULL))
{
known_id.net = "known-othernet";
known_id.next = netid;
netid = &known_id;
}
if (mess_type == 0 && !pxe)
{

7
src/rfc3315.c
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@@ -526,6 +526,13 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
if (have_config(config, CONFIG_DISABLE))
ignore = 1;
}
else if (state->clid &&
find_config(daemon->dhcp_conf, NULL, state->clid, state->clid_len, state->mac, state->mac_len, state->mac_type, NULL))
{
known_id.net = "known-othernet";
known_id.next = state->tags;
state->tags = &known_id;
}
#ifdef OPTION6_PREFIX_CLASS
/* OPTION_PREFIX_CLASS in ORO, send addresses in all prefix classes */