+/*
+ This file is part of GNUnet.
+ Copyright (C) 2012 GNUnet e.V.
+
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "nss_gns_query.h"
#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
/**
* @param u the userdata (result struct)
* @return -1 on error else 0
*/
-int gns_resolve_name(int af, const char *name, struct userdata *u)
+int
+gns_resolve_name (int af,
+ const char *name,
+ struct userdata *u)
{
FILE *p;
char *cmd;
char line[128];
+ int ret;
- if (af == AF_INET6)
+ if (AF_INET6 == af)
{
- if (-1 == asprintf(&cmd, "%s -t AAAA -u %s\n", "gnunet-gns -r", name))
+ if (-1 == asprintf (&cmd,
+ "%s -t AAAA -u %s\n",
+ "gnunet-gns -r",
+ name))
return -1;
}
else
{
- if (-1 == asprintf(&cmd, "%s %s\n", "gnunet-gns -r -u", name))
+ if (-1 == asprintf (&cmd,
+ "%s %s\n",
+ "gnunet-gns -r -u",
+ name))
return -1;
}
-
- p = popen(cmd,"r");
-
- if (p != NULL )
+ if (NULL == (p = popen (cmd, "r")))
+ {
+ free (cmd);
+ return -1;
+ }
+ while (NULL != fgets (line,
+ sizeof(line),
+ p))
{
- while (fgets( line, sizeof(line), p ) != NULL)
+ if (u->count >= MAX_ENTRIES)
+ break;
+ if (line[strlen(line)-1] == '\n')
{
-
- if (u->count >= MAX_ENTRIES)
- break;
-
- if (line[strlen(line)-1] == '\n')
+ line[strlen(line)-1] = '\0';
+ if (AF_INET == af)
+ {
+ if (inet_pton(af,
+ line,
+ &u->data.ipv4[u->count]))
+ {
+ u->count++;
+ u->data_len += sizeof(ipv4_address_t);
+ }
+ else
+ {
+ pclose (p);
+ free (cmd);
+ return -1;
+ }
+ }
+ else if (AF_INET6 == af)
{
- line[strlen(line)-1] = '\0';
- if (af == AF_INET)
+ if (inet_pton(af,
+ line,
+ &u->data.ipv6[u->count]))
{
- if (inet_pton(af, line, &(u->data.ipv4[u->count++])))
- u->data_len += sizeof(ipv4_address_t);
- else
- {
- fclose (p);
- free (cmd);
- return -1;
- }
- }
- else if ((af == AF_INET6))
+ u->count++;
+ u->data_len += sizeof(ipv6_address_t);
+ }
+ else
{
- if (inet_pton(af, line, &(u->data.ipv6[u->count++])))
- u->data_len += sizeof(ipv6_address_t);
- else
- {
- fclose (p);
- free (cmd);
- return -1;
- }
- }
+ pclose (p);
+ free (cmd);
+ return -1;
+ }
}
}
- fclose (p);
}
+ ret = pclose (p);
free (cmd);
-
+ if (4 == ret)
+ return -2; /* not for GNS */
+ if (3 == ret)
+ return -3; /* timeout -> not found */
+ if ( (2 == ret) || (1 == ret) )
+ return -2; /* launch failure -> service unavailable */
return 0;
-
}
+
+/* end of nss_gns_query.c */