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#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "nss_gns_query.h"
#include <arpa/inet.h>
/**
* Wrapper function that uses gnunet-gns cli tool to resolve
* an IPv4/6 address.
*
* @param af address family
* @param name the name to resolve
* @param u the userdata (result struct)
* @return -1 on error else 0
*/
int gns_resolve_name(int af, const char *name, struct userdata *u)
{
FILE *p;
char *cmd;
char line[128];
if (af == AF_INET6)
{
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))
return -1;
}
p = popen(cmd,"r");
if (p != NULL )
{
while (fgets( line, sizeof(line), p ) != NULL)
{
if (u->count >= MAX_ENTRIES)
break;
if (line[strlen(line)-1] == '\n')
{
line[strlen(line)-1] = '\0';
if (af == AF_INET)
{
inet_pton(af, line, &(u->data.ipv4[u->count++]));
u->data_len += sizeof(ipv4_address_t);
}
else if ((af == AF_INET6))
{
inet_pton(af, line, &(u->data.ipv6[u->count++]));
u->data_len += sizeof(ipv6_address_t);
}
}
}
}
fclose(p);
free(cmd);
return 0;
}
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