int main(int argc, char **argv)
{
DskDnsConfigFlags cfg_flags = DSK_DNS_CONFIG_FLAGS_INIT;
dsk_boolean no_searchpath = DSK_FALSE;
int i;
dsk_cmdline_init ("perform DNS lookups",
"Perform DNS lookups with Dsk DNS client.\n",
"HOSTNAMES...",
0);
dsk_cmdline_permit_extra_arguments (DSK_TRUE);
dsk_cmdline_add_boolean ("ipv6", "Lookup names in the IPv6 namespace", NULL, 0, &use_ipv6);
dsk_cmdline_add_boolean ("ipv4", "Lookup names in the IPv4 namespace", NULL, DSK_CMDLINE_REVERSED, &use_ipv6);
dsk_cmdline_add_boolean ("cname", "Return CNAME or POINTER records if they arise", NULL, 0, &no_links);
dsk_cmdline_add_string ("nameserver", "Specify the nameserver to use", "IP", 0, &nameserver);
dsk_cmdline_add_boolean ("verbose", "Print extra messages", NULL, 0, &verbose);
dsk_cmdline_add_boolean ("no-searchpath", "Do not use /etc/resolv.conf's searchpath", NULL, 0, &no_searchpath);
dsk_cmdline_add_boolean ("fatal-errors", "Exit on first error", NULL, 0, &fatal_errors);
dsk_cmdline_process_args (&argc, &argv);
if (no_searchpath)
cfg_flags &= ~DSK_DNS_CONFIG_USE_RESOLV_CONF_SEARCHPATH;
if (nameserver == NULL)
{
/* just use default config */
}
else
{
DskIpAddress addr;
cfg_flags &= ~DSK_DNS_CONFIG_USE_RESOLV_CONF_NS;
if (!dsk_ip_address_parse_numeric (nameserver, &addr))
dsk_error ("error parsing nameserver address (must be numeric)");
dsk_dns_client_add_nameserver (&addr);
}
dsk_dns_client_config (cfg_flags);
if (verbose)
{
dsk_dns_config_dump ();
}
if (argc == 1)
dsk_error ("expected name to resolve");
for (i = 1; i < argc; i++)
{
n_running++;
dsk_dns_lookup (argv[i],
use_ipv6,
handle_dns_result,
argv[i]);
while (n_running >= max_concurrent)
dsk_main_run_once ();
}
dsk_dispatch_destroy_default ();
return exit_status;
}
static void
begin_connecting (DskClientStream *stream)
{
if (stream->is_local_socket)
{
struct sockaddr_un addr;
unsigned length = strlen (stream->name);
if (length > sizeof (addr.sun_path))
{
/* name too long */
/* TODO: catch this in constructor */
dsk_octet_stream_set_last_error (&stream->base_instance,
"name too long for local socket");
return;
}
addr.sun_family = AF_LOCAL;
memcpy (addr.sun_path, stream->name,
length == sizeof (addr.sun_path) ? length : length + 1);
begin_connecting_sockaddr (stream, sizeof (addr), (struct sockaddr *) &addr);
}
else if (stream->is_numeric_name)
{
struct sockaddr_storage addr;
unsigned addr_len;
DskIpAddress address;
/* parse name into addr/addr_len */
if (!dsk_ip_address_parse_numeric (stream->name, &address))
dsk_die ("dsk_ip_address_parse_numeric failed on %s", stream->name);
dsk_ip_address_to_sockaddr (&address, stream->port, &addr, &addr_len);
begin_connecting_sockaddr (stream, addr_len, (struct sockaddr *) &addr);
}
else
{
/* begin dns lookup */
stream->is_resolving_name = 1;
dsk_object_ref (stream);
dsk_dns_lookup (stream->name,
DSK_FALSE, /* is_ipv6? should be be needed */
handle_dns_done, stream);
}
}
