Hello, Chris, with libbsd I also realized this with the concept you suggested (still beta development):
...
sc = rtems_bsd_initialize();
assert(sc == RTEMS_SUCCESSFUL);
/* Let the callout timer allocate its resources */
sc = rtems_task_wake_after(2);
assert(sc == RTEMS_SUCCESSFUL);
rtems_bsd_ifconfig_lo0();
// lookup available network interfaces
char ifnamebuf[IF_NAMESIZE];
char *ifname;
// get primary network interface
ifname = if_indextoname(1, &ifnamebuf[0]);
assert(ifname != NULL);
printf("\n***** Primary Network interface : %s *****\n", ifname);
default_network_dhcpcd();
// implement DHCP hook ... and wait for acknowledge
dhcpDone = epicsEventMustCreate(epicsEventEmpty);
rtems_dhcpcd_add_hook(&dhcpcd_hook);
// wait for dhcp done ... should be if SYNCDHCP is used
epicsEventWaitStatus stat;
int counter = 10;
do {
printf("\n ---- Wait for DHCP done ...\n");
stat = epicsEventWaitWithTimeout(dhcpDone, 5.0);
} while ((stat == epicsEventWaitTimeout) && (--counter > 0));
if (stat == epicsEventOK)
epicsEventDestroy(dhcpDone);
else
printf("\n ---- dhcpDone Event Unknown state %d\n", stat);
…
static void
default_network_dhcpcd(void)
{
static const char default_cfg[] = "clientid FHI test client\n";
rtems_status_code sc;
int fd;
int rv;
ssize_t n;
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\nipv4only\noption ntp_servers\noption
rtems_cmdline\n";
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);
}
static void
dhcpcd_hook_handler(rtems_dhcpcd_hook *hook, char *const *env)
{
int bound = 0;
char iName[16];
char *name;
char *value;
(void)hook;
while (*env != NULL) {
name = strtok(*env,"=");
value = strtok(NULL,"=");
printf("all out ---> %s = %s\n", name, value);
if (!strncmp(name, "interface", 9) && !strcmp(value,
NET_CFG_INTERFACE_0))
strncpy(iName, value, 16);
if (!strncmp(name, "reason", 6) && !strncmp(value, "BOUND", 5)){
printf ("Interface %s bounded\n", iName);
bound = 1;
}
if (bound) {
// as there is no ntp-support in rtems-libbsd, we call our
own client
if(!strncmp(name, "new_ntp_servers", 15))
strcpy(rtemsInit_NTP_server_ip,value);
if(!strncmp(name, "new_host_name", 13))
sethostname (value, strlen (value));
if(!strncmp(name, "new_tftp_server_name", 20)){
printf(" new_tftp_server_name : %s\n", value);
strncpy(rtems_bsdnet_bootp_server_name,value,
sizeof(bootp_server_name_init));
}
printf("---> %s = %s\n", name, value);
}
++env;
}
if (bound)
epicsEventSignal(dhcpDone);
}
static rtems_dhcpcd_hook dhcpcd_hook = {
.name = "ioc boot",
.handler = dhcpcd_hook_handler
};
But the biggest problem here is that on the test-CI-system (travis, appveyor,
etc.) a dhcp-server,
ntp-server, nfs-server and complex routing structures for e.g. qemu must be
provided.
There it is easier to use environment variables.
Many greetings
Heinz
> On 9. Aug 2020, at 02:44, Chris Johns <chr...@rtems.org> wrote:
>
>> nging configuration. And likely only one NIC.
>
> Agreed and it works for a testsuite to some extent. Network tests are hard
> because you need a very controlled network set up to make then work.
>
>> It was used in the network demos for the legacy stack so if we want to
>> eliminate it completely, it would be good to find a recommended way to
>> look up the interface name and put it into the legacy configuration
>> tables.
>>
>> https://git.rtems.org/network-demos/tree
>>
>> Yes... I know we all want to see it removed and everyone move to
>> libbsd. But I don't think that is realistic to expect. The more realistic
>> solution is to move it to its own build tree and freeze it. It is there
>> and we encourage people to use libbsd. But it does offer a solution
>> for older target boards. The old stack is also all that is supported by
>> many EPICS boards. Outside of EPICS users, even the SPARC BSPs
>> haven't been converted yet.
>
> Yes we should move it out of the main tree and have it becomes an available
> optional package. It can be maintained by those with an active interest in it.
>
> It has some bugs ... we found one last year with the arp cache and Windows.
> The
> solution was a hack to set the arp aging timer to a very large number.
>
>> Anyway... I'd love to see RTEMS_BSP_NETWORK_DRIVER_NAME
>> killed completely but we need to address filling in the legacy network
>> stack table before the stack is initialized enough to even know the
>> interface names.
>
> Yes, but Heinz is working on libbsd support for EPICS or have I missed
> something?
>
>> Perhaps this turns into an application provided method for the legacy
>> stack? Just a thought.
>
> Yes that works.
>
> Chris
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