Re: Using libbsd dhcpcd options
This stored as "/etc/dhcpcd.conf" might not be completely correct but it works. In the call-back hook you'll get a "new_root_path=" entry with what is set on the DHCP host. Thanks! static const char* dhcpcd_conf_text = \ "debug\n" "clientid\n" "nodhcp6\n" "ipv4only\n" "timeout 0\n" "interface ffec0\n" "option bootfile_name\n" "option root_path\n" "\n"; Peter - Peter Dufault HD Associates, Inc. Software and System Engineering signature.asc Description: Message signed with OpenPGP ___ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
Re: Using libbsd dhcpcd options
> On Aug 19, 2021, at 20:02 , Chris Johns wrote:
>
> On 20/8/21 1:45 am, junkes wrote:
>> Hallo Peter,
>> I do not know if this is best practice but I run the following code:
>>
>> static void
>> default_network_dhcpcd(void)
>> {
>> static const char default_cfg[] = "clientid test client\n";
>> rtems_status_code sc;
>> int fd;
>> int rv;
>> ssize_t n;
>> struct stat statbuf;
>>
>> if (ENOENT == stat("/etc/dhcpcd.conf", )) {
>> fd = open("/etc/dhcpcd.conf", O_CREAT | O_WRONLY,
>> S_IRWXU | S_IRWXG | S_IRWXO);
>> assert(fd >= 0);
>>
>> n = write(fd, default_cfg, sizeof(default_cfg) - 1);
>> assert(n == (ssize_t) sizeof(default_cfg) - 1);
>>
>> static const char fhi_cfg[] =
>> "nodhcp6\n"
>> "ipv4only\n"
>> "option ntp_servers\n"
>> "option rtems_cmdline\n"
>> "option tftp_server_name\n"
>> "option bootfile_name\n"
>> "define 129 string rtems_cmdline\n"
>> "timeout 0";
>>
>> n = write(fd, fhi_cfg, sizeof(fhi_cfg) - 1);
>> assert(n == (ssize_t) sizeof(fhi_cfg) - 1);
>>
>> rv = close(fd);
>> assert(rv == 0);
>> }
>>
>> sc = rtems_dhcpcd_start(NULL);
>> assert(sc == RTEMS_SUCCESSFUL);
>> }
> Hienz, this is a good solution and using a file best solution.
>
> Chris
I see online that DHCP option 129 has three definitions: "PXE - undefined
(vendor specific)", "Kernel options Variable length string", and "Call Server
IP address".
Above does "option rtems_cmdline" and "define 129 string rtems_cmdline" set
option 129 to correspond to "Kernel options"? There's no "DHO_" define for 129
in dhcp.h so I assume that's why you need the "define 129".
Option 17 is defined in dhcp.h ("#define DHO_ROOT_PATH 17") so I assume I just
add "option root_path". I'll try it later today.
Peter
-
Peter Dufault
HD Associates, Inc. Software and System Engineering
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Re: Using libbsd dhcpcd options
On 20/8/21 1:45 am, junkes wrote:
> Hallo Peter,
> I do not know if this is best practice but I run the following code:
>
> static void
> default_network_dhcpcd(void)
> {
> static const char default_cfg[] = "clientid test client\n";
> rtems_status_code sc;
> int fd;
> int rv;
> ssize_t n;
> struct stat statbuf;
>
> if (ENOENT == stat("/etc/dhcpcd.conf", )) {
> fd = open("/etc/dhcpcd.conf", O_CREAT | O_WRONLY,
> S_IRWXU | S_IRWXG | S_IRWXO);
> assert(fd >= 0);
>
> n = write(fd, default_cfg, sizeof(default_cfg) - 1);
> assert(n == (ssize_t) sizeof(default_cfg) - 1);
>
> static const char fhi_cfg[] =
> "nodhcp6\n"
> "ipv4only\n"
> "option ntp_servers\n"
> "option rtems_cmdline\n"
> "option tftp_server_name\n"
> "option bootfile_name\n"
> "define 129 string rtems_cmdline\n"
> "timeout 0";
>
> n = write(fd, fhi_cfg, sizeof(fhi_cfg) - 1);
> assert(n == (ssize_t) sizeof(fhi_cfg) - 1);
>
> rv = close(fd);
> assert(rv == 0);
> }
>
> sc = rtems_dhcpcd_start(NULL);
> assert(sc == RTEMS_SUCCESSFUL);
> }
Hienz, this is a good solution and using a file best solution.
Chris
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Re: Using libbsd dhcpcd options
Hallo Peter,
I do not know if this is best practice but I run the following code:
static void
default_network_dhcpcd(void)
{
static const char default_cfg[] = "clientid test client\n";
rtems_status_code sc;
int fd;
int rv;
ssize_t n;
struct stat statbuf;
if (ENOENT == stat("/etc/dhcpcd.conf", )) {
fd = open("/etc/dhcpcd.conf", O_CREAT | O_WRONLY,
S_IRWXU | S_IRWXG | S_IRWXO);
assert(fd >= 0);
n = write(fd, default_cfg, sizeof(default_cfg) - 1);
assert(n == (ssize_t) sizeof(default_cfg) - 1);
static const char fhi_cfg[] =
"nodhcp6\n"
"ipv4only\n"
"option ntp_servers\n"
"option rtems_cmdline\n"
"option tftp_server_name\n"
"option bootfile_name\n"
"define 129 string rtems_cmdline\n"
"timeout 0";
n = write(fd, fhi_cfg, sizeof(fhi_cfg) - 1);
assert(n == (ssize_t) sizeof(fhi_cfg) - 1);
rv = close(fd);
assert(rv == 0);
}
sc = rtems_dhcpcd_start(NULL);
assert(sc == RTEMS_SUCCESSFUL);
}
Heinz
On 2021-08-19 12:16, Peter Dufault wrote:
I'd like to use the DHCP option 17 (Root Path) to get a mount point
for NFS from the DHCP server.
I'm starting dhcp with "rtems_dhcpcd_start(NULL)" so it's starting
with only the argv array of {"dhcpcd", NULL }.
I *think* I need to start it with a customized rtems_dhcpcd_config
that would maybe include a "--option" argument, and retrieve it in a
run hook (I'm using the run hook already to wait for an IP address to
be assigned). The FreeBSD "--option" documentation is:
-o, --option "option"
Request the DHCP "option" variable for use in
"/usr/local/libexec/dhcpcd-run-hooks".
which would be an argv of {"dhcpcd", "--option", "17", NULL }.
Or is best practice to do something with "rtems-bsd-rc-conf-net.c"?
Peter
-
Peter Dufault
HD Associates, Inc. Software and System Engineering
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Using libbsd dhcpcd options
I'd like to use the DHCP option 17 (Root Path) to get a mount point for NFS
from the DHCP server.
I'm starting dhcp with "rtems_dhcpcd_start(NULL)" so it's starting with only
the argv array of {"dhcpcd", NULL }.
I *think* I need to start it with a customized rtems_dhcpcd_config that would
maybe include a "--option" argument, and retrieve it in a run hook (I'm using
the run hook already to wait for an IP address to be assigned). The FreeBSD
"--option" documentation is:
-o, --option "option"
Request the DHCP "option" variable for use in
"/usr/local/libexec/dhcpcd-run-hooks".
which would be an argv of {"dhcpcd", "--option", "17", NULL }.
Or is best practice to do something with "rtems-bsd-rc-conf-net.c"?
Peter
-
Peter Dufault
HD Associates, Inc. Software and System Engineering
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