[Dnsmasq-discuss] [PATCH 1/1] Allow overriding of ubus service name.

2020-03-20 Thread Oldřich Jedlička
Same as for the dbus, allow specifying ubus service name (namespace) on
the command line as an optional argument to --enable-ubus option.

Signed-off-by: Oldřich Jedlička 
---
 man/dnsmasq.8 |  7 +--
 src/config.h  |  1 +
 src/dnsmasq.h |  1 +
 src/option.c  | 14 +++---
 src/ubus.c|  3 ++-
 5 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/man/dnsmasq.8 b/man/dnsmasq.8
index 2032a37..034e3cf 100644
--- a/man/dnsmasq.8
+++ b/man/dnsmasq.8
@@ -366,10 +366,13 @@ been built with DBus support. If the service name is 
given, dnsmasq
 provides service at that name, rather than the default which is 
 .B uk.org.thekelleys.dnsmasq
 .TP 
-.B --enable-ubus
+.B --enable-ubus[=]
 Enable dnsmasq UBus interface. It sends notifications via UBus on
 DHCPACK and DHCPRELEASE events. Furthermore it offers metrics.
-Requires that dnsmasq has been built with UBus support.
+Requires that dnsmasq has been built with UBus support. If the service
+name is given, dnsmasq provides service at that namespace, rather than
+the default which is
+.B dnsmasq
 .TP
 .B \-o, --strict-order
 By default, dnsmasq will send queries to any of the upstream servers
diff --git a/src/config.h b/src/config.h
index b002560..7d08f7d 100644
--- a/src/config.h
+++ b/src/config.h
@@ -50,6 +50,7 @@
 #define RANDFILE "/dev/urandom"
 #define DNSMASQ_SERVICE "uk.org.thekelleys.dnsmasq" /* Default - may be 
overridden by config */
 #define DNSMASQ_PATH "/uk/org/thekelleys/dnsmasq"
+#define DNSMASQ_UBUS_NAME "dnsmasq" /* Default - may be overridden by config */
 #define AUTH_TTL 600 /* default TTL for auth DNS */
 #define SOA_REFRESH 1200 /* SOA refresh default */
 #define SOA_RETRY 180 /* SOA retry default */
diff --git a/src/dnsmasq.h b/src/dnsmasq.h
index f747868..b47ef74 100644
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -1063,6 +1063,7 @@ extern struct daemon {
   unsigned int duid_enterprise, duid_config_len;
   unsigned char *duid_config;
   char *dbus_name;
+  char *ubus_name;
   char *dump_file;
   int dump_mask;
   unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
diff --git a/src/option.c b/src/option.c
index 9ffd7fc..1f698da 100644
--- a/src/option.c
+++ b/src/option.c
@@ -238,7 +238,7 @@ static const struct myoption opts[] =
 { "caa-record", 1, 0 , LOPT_CAA },
 { "dns-rr", 1, 0, LOPT_RR },
 { "enable-dbus", 2, 0, '1' },
-{ "enable-ubus", 0, 0, LOPT_UBUS },
+{ "enable-ubus", 2, 0, LOPT_UBUS },
 { "bootp-dynamic", 2, 0, '3' },
 { "dhcp-mac", 1, 0, '4' },
 { "no-ping", 0, 0, '5' },
@@ -428,7 +428,7 @@ static struct {
   { 'z', OPT_NOWILD, NULL, gettext_noop("Bind only to interfaces in use."), 
NULL },
   { 'Z', OPT_ETHERS, NULL, gettext_noop("Read DHCP static host information 
from %s."), ETHERSFILE },
   { '1', ARG_ONE, "[=]", gettext_noop("Enable the DBus interface for 
setting upstream servers, etc."), NULL },
-  { LOPT_UBUS, OPT_UBUS, NULL, gettext_noop("Enable the UBus interface."), 
NULL },
+  { LOPT_UBUS, ARG_ONE, "[=]", gettext_noop("Enable the UBus 
interface."), NULL },
   { '2', ARG_DUP, "", gettext_noop("Do not provide DHCP on this 
interface, only provide DNS."), NULL },
   { '3', ARG_DUP, "[=tag:]...", gettext_noop("Enable dynamic address 
allocation for bootp."), NULL },
   { '4', ARG_DUP, "set:,", gettext_noop("Map MAC address 
(with wildcards) to option set."), NULL },
@@ -1881,7 +1881,15 @@ static int one_opt(int option, char *arg, char *errstr, 
char *gen_err, int comma
   else
daemon->dbus_name = DNSMASQ_SERVICE;
   break;
-  
+
+case LOPT_UBUS: /* --enable-ubus */
+  set_option_bool(OPT_UBUS);
+  if (arg)
+   daemon->ubus_name = opt_string_alloc(arg);
+  else
+   daemon->ubus_name = DNSMASQ_UBUS_NAME;
+  break;
+
 case '8': /* --log-facility */
   /* may be a filename */
   if (strchr(arg, '/') || strcmp (arg, "-") == 0)
diff --git a/src/ubus.c b/src/ubus.c
index c7f6b19..5f81287 100644
--- a/src/ubus.c
+++ b/src/ubus.c
@@ -38,7 +38,7 @@ static struct ubus_object_type ubus_object_type =
   UBUS_OBJECT_TYPE("dnsmasq", ubus_object_methods);
 
 static struct ubus_object ubus_object = {
-  .name = "dnsmasq",
+  .name = NULL,
   .type = _object_type,
   .methods = ubus_object_methods,
   .n_methods = ARRAY_SIZE(ubus_object_methods),
@@ -94,6 +94,7 @@ void ubus_init()
   return;
 }
 
+  ubus_object.name = daemon->ubus_name;
   ret = ubus_add_object(ubus, _object);
   if (ret)
 {
-- 
2.17.1


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[Dnsmasq-discuss] [PATCH 0/1] Allow overriding of ubus service name

2020-03-20 Thread Oldřich Jedlička
Hi,

Another patch, now adding option to specify the name of ubus service
visible by a call to `ubus list`. This is useful when you have more than
one dnsmasq instances running -- the ubus service name has to be unique
for each instance, otherwise `ubus_add_object` fails. With this patch,
it is possible to change the registered name, like for the D-Bus case.

Tested on OpenWrt.

Regards,
Oldrich.

Oldřich Jedlička (1):
  Allow overriding of ubus service name.

 man/dnsmasq.8 |  7 +--
 src/config.h  |  1 +
 src/dnsmasq.h |  1 +
 src/option.c  | 14 +++---
 src/ubus.c|  3 ++-
 5 files changed, 20 insertions(+), 6 deletions(-)

-- 
2.17.1


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Re: [Dnsmasq-discuss] Nameserver dot

2020-03-20 Thread William Edwards
> This sounds like a bug, doing auth DNS without an auth-server statement
> is a recent addition, and I probably forgot this effect on secondary
> servers. Will take a look in the next day or two.

No worries. What's important to me is that only entries in 'auth-sec-servers' 
are returned as NS records, being my public DNS servers.
Thanks,
William


On 20/03/2020 08:25, William Edwards wrote:
>
>> Op 20 mrt. 2020 om 00:23 heeft Simon Kelley  het 
>> volgende geschreven:
>>
>>> On 19/03/2020 17:23, William Edwards wrote:
>>> Hi,
>>>
>>> I have auth-sec-servers set to:
>>> 'auth-sec-servers=nsauth0.cyberfusion.nl,nsauth1.cyberfusion.be,nsauth2.cyberfusion.nu,nsauth3.cyberfusion.nl'
>>>
>>> These nameservers are shown, but I am also getting back an NS record
>>> consisting of '.':
>>>
>>> ---
>>> ;; ANSWER SECTION:
>>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth1.cyberfusion.be.
>>> vlan5.hosts.cyberfusion.space. 600 IN NS .
>>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth0.cyberfusion.nl.
>>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth2.cyberfusion.nu.
>>> vlan5.hosts.cyberfusion.space. 600 INNSnsauth3.cyberfusion.nl.
>>> --
>>>
>>> Where does 'NS .' come from?
>>
>> The --auth-server configuration, probably.  What does that look like?
>
> I did not specify an ‘auth-server’ directive. I did so, and now, the first NS 
> record indeed is no longer a dot.
>
> This brings me to the next question: how do I prevent dnsmasq from even 
> showing itself in NS records? dnsmasq will not answer queries to the internet.
>
>>
>>
>> Simon.
>>
>>
>>>
>>> Met vriendelijke groeten,
>>>
>>> William Edwards
>>> T. 040 - 711 44 96
>>> E. wedwa...@cyberfusion.nl
>>>
>>>
>>>
>>>  
>>>
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>>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>>>
>>
>>
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Re: [Dnsmasq-discuss] SOA serial increase

2020-03-20 Thread William Edwards
Hi Simon!
> If you don't explicitly set the serial, then it should start at the
> current epoch  time (ie seconds since 1/1/1970) which avoids the problem
> unless you average more than one new DHCP lease per second.
After setting 'auth-server', this behaviour has been 'fixed'.
Without 'auth-server':
--
vlan5.hosts.cyberfusion.space. 600 IN    SOA    . . 1 1200 180 1209600 600
--
With 'auth-server':
--
vlan5.hosts.cyberfusion.space. 600 IN    SOA    vlan5.hosts.cyberfusion.space. 
hostmaster.vlan5.hosts.cyberfusion.space. 1584702843 1200 180 1209600 600
--
So this seems like a combination of 1) possibly some room for improvement in 
docs (there is little mention of serials there at all) and 2) working too late 
at night.
William

On 20/03/2020 08:18, William Edwards wrote:
>
> Op 20 mrt. 2020 om 00:39 heeft Simon Kelley  > het volgende geschreven:
>
>> On 19/03/2020 17:28, William Edwards wrote:
>>> Hello,
>>>
>>> Does dnsmasq increase SOA serial when adding a new DNS record after DHCP
>>> lease is requested?
>>
>> Yes.
>>
>>>
>>> I am not sure because docs say '--auth-soa' allows for specifying serial.
>>
>> It does, but it's optional: dnsmasq will generate one for you. If you do
>> specify a serial, it will still get incremented after a new DHCP lease
>> is created.
>
> Thanks.
>
> I noticed that serial is reset back to 1 when dnsmasq is restarted. This
> would cause the serial to be lower on dnsmasq than its slaves after a
> restart, even when DHCP leases are handed out and DNS records are added.
>
> Is this intentional behaviour?
>
>>
>>
>> Cheers,
>>
>> Simon.
>>
>>>
>>> Met vriendelijke groeten,
>>>
>>> William Edwards
>>> T. 040 - 711 44 96
>>> E. wedwa...@cyberfusion.nl 
>>>
>>>
>>>
>>>
>>>
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>>> Dnsmasq-discuss@lists.thekelleys.org.uk
>>> 
>>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>>>
>>
>>
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Re: [Dnsmasq-discuss] Nameserver dot

2020-03-20 Thread Simon Kelley
This sounds like a bug, doing auth DNS without an auth-server statement
is a recent addition, and I probably forgot this effect on secondary
servers. Will take a look in the next day or two.

Simon.


On 20/03/2020 08:25, William Edwards wrote:
> 
>> Op 20 mrt. 2020 om 00:23 heeft Simon Kelley  het 
>> volgende geschreven:
>>
>>> On 19/03/2020 17:23, William Edwards wrote:
>>> Hi,
>>>
>>> I have auth-sec-servers set to:
>>> 'auth-sec-servers=nsauth0.cyberfusion.nl,nsauth1.cyberfusion.be,nsauth2.cyberfusion.nu,nsauth3.cyberfusion.nl'
>>>
>>> These nameservers are shown, but I am also getting back an NS record
>>> consisting of '.':
>>>
>>> ---
>>> ;; ANSWER SECTION:
>>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth1.cyberfusion.be.
>>> vlan5.hosts.cyberfusion.space. 600 IN NS .
>>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth0.cyberfusion.nl.
>>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth2.cyberfusion.nu.
>>> vlan5.hosts.cyberfusion.space. 600 INNSnsauth3.cyberfusion.nl.
>>> --
>>>
>>> Where does 'NS .' come from?
>>
>> The --auth-server configuration, probably.  What does that look like?
> 
> I did not specify an ‘auth-server’ directive. I did so, and now, the first NS 
> record indeed is no longer a dot.
> 
> This brings me to the next question: how do I prevent dnsmasq from even 
> showing itself in NS records? dnsmasq will not answer queries to the internet.
> 
>>
>>
>> Simon.
>>
>>
>>>
>>> Met vriendelijke groeten,
>>>
>>> William Edwards
>>> T. 040 - 711 44 96
>>> E. wedwa...@cyberfusion.nl
>>>
>>>
>>>
>>>  
>>>
>>> ___
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>>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>>>
>>
>>
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Re: [Dnsmasq-discuss] SOA serial increase

2020-03-20 Thread Simon Kelley
If you don't explicitly set the serial, then it should start at the
current epoch  time (ie seconds since 1/1/1970) which avoids the problem
unless you average more than one new DHCP lease per second.

Not sure which you are seeing it reseting to zero: no RTC and starting
dnsmasq before running NTP, maybe?


Simon.


On 20/03/2020 08:18, William Edwards wrote:
> 
> Op 20 mrt. 2020 om 00:39 heeft Simon Kelley  > het volgende geschreven:
> 
>> On 19/03/2020 17:28, William Edwards wrote:
>>> Hello,
>>>
>>> Does dnsmasq increase SOA serial when adding a new DNS record after DHCP
>>> lease is requested?
>>
>> Yes.
>>
>>>
>>> I am not sure because docs say '--auth-soa' allows for specifying serial.
>>
>> It does, but it's optional: dnsmasq will generate one for you. If you do
>> specify a serial, it will still get incremented after a new DHCP lease
>> is created.
> 
> Thanks.
> 
> I noticed that serial is reset back to 1 when dnsmasq is restarted. This
> would cause the serial to be lower on dnsmasq than its slaves after a
> restart, even when DHCP leases are handed out and DNS records are added.
> 
> Is this intentional behaviour?
> 
>>
>>
>> Cheers,
>>
>> Simon.
>>
>>>
>>> Met vriendelijke groeten,
>>>
>>> William Edwards
>>> T. 040 - 711 44 96
>>> E. wedwa...@cyberfusion.nl 
>>>
>>>
>>>
>>>  
>>>
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>>> Dnsmasq-discuss@lists.thekelleys.org.uk
>>> 
>>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>>>
>>
>>
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Re: [Dnsmasq-discuss] SOA serial increase

2020-03-20 Thread William Edwards

> Op 20 mrt. 2020 om 00:39 heeft Simon Kelley  het 
> volgende geschreven:
> 
>> On 19/03/2020 17:28, William Edwards wrote:
>> Hello,
>> 
>> Does dnsmasq increase SOA serial when adding a new DNS record after DHCP
>> lease is requested?
> 
> Yes.
> 
>> 
>> I am not sure because docs say '--auth-soa' allows for specifying serial.
> 
> It does, but it's optional: dnsmasq will generate one for you. If you do
> specify a serial, it will still get incremented after a new DHCP lease
> is created.

Thanks.

I noticed that serial is reset back to 1 when dnsmasq is restarted. This would 
cause the serial to be lower on dnsmasq than its slaves after a restart, even 
when DHCP leases are handed out and DNS records are added.

Is this intentional behaviour?

> 
> 
> Cheers,
> 
> Simon.
> 
>> 
>> Met vriendelijke groeten,
>> 
>> William Edwards
>> T. 040 - 711 44 96
>> E. wedwa...@cyberfusion.nl
>> 
>> 
>> 
>>  
>> 
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> 
> 
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Re: [Dnsmasq-discuss] Nameserver dot

2020-03-20 Thread William Edwards

> Op 20 mrt. 2020 om 00:23 heeft Simon Kelley  het 
> volgende geschreven:
> 
>> On 19/03/2020 17:23, William Edwards wrote:
>> Hi,
>> 
>> I have auth-sec-servers set to:
>> 'auth-sec-servers=nsauth0.cyberfusion.nl,nsauth1.cyberfusion.be,nsauth2.cyberfusion.nu,nsauth3.cyberfusion.nl'
>> 
>> These nameservers are shown, but I am also getting back an NS record
>> consisting of '.':
>> 
>> ---
>> ;; ANSWER SECTION:
>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth1.cyberfusion.be.
>> vlan5.hosts.cyberfusion.space. 600 IN NS .
>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth0.cyberfusion.nl.
>> vlan5.hosts.cyberfusion.space. 600 IN NS nsauth2.cyberfusion.nu.
>> vlan5.hosts.cyberfusion.space. 600 INNSnsauth3.cyberfusion.nl.
>> --
>> 
>> Where does 'NS .' come from?
> 
> The --auth-server configuration, probably.  What does that look like?

I did not specify an ‘auth-server’ directive. I did so, and now, the first NS 
record indeed is no longer a dot.

This brings me to the next question: how do I prevent dnsmasq from even showing 
itself in NS records? dnsmasq will not answer queries to the internet.

> 
> 
> Simon.
> 
> 
>> 
>> Met vriendelijke groeten,
>> 
>> William Edwards
>> T. 040 - 711 44 96
>> E. wedwa...@cyberfusion.nl
>> 
>> 
>> 
>>  
>> 
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> 
> 
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Re: [Dnsmasq-discuss] NETLINK_NO_ENOBUFS not defined on old platforms

2020-03-20 Thread Geert Stappers
On Fri, Mar 20, 2020 at 02:18:18AM +, Roy Marples wrote:
> On 19/03/2020 22:01, Simon Kelley wrote:
> > http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=0506a5ed4e56863627c54aedad30ad61221292ef
> > 
> > 
> > should handle both old kernel header files and old kernels, in any
> > combination.
> 
> I really dislike this approach because it makes the assumption that no other
> symbol will take No 5.
> 
> Whilst this might be true for generic linux, is it true for customised linux?
> Or to put it another way I can point to many examples cross BSD where the
> ioctls differ in number but not name.
> 
> You might take the view "So what? We just support generic linux.".
> 
> I have started to take the hard stance with Arch Linux which shipped latest
> kernel headers and support that on an old LTS kernel. It's not maintainable
> because I've had 3 instances where dhcpcd used to do this and then promptly
> crashed on newer kernels because they had customised headers.
> 
> Modern software should not need this hack. Either #ifdef around it or
> require userland headers to define it. Don't hardcode it as it's not
> userlands responsibility to do it.
> 
> See the similar case where OpenBSD removed a ioctl but let it in the header
> - even worse!!
 
|$ git pull
|Already up to date.
|$ git branch | grep \*
|* master
|$ git log -p 0506a5ed4e56863627^1...0506a5ed4e56863627 | sed -n 107,111p
| 
|+#ifndef NETLINK_NO_ENOBUFS
|+#define NETLINK_NO_ENOBUFS 5
|+#endif
| 
|$ 
 

In case more  #ifdef   is wanted,  sent patches ...



Regards
Geert Stappers
-- 
Silence is hard to parse

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