/*
* Copyright (C) 2018, Peter Pentchev
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
int main(int argc, char *argv[])
{
if (argc != 2) {
fputs("Usage: have-af {inet,inet6}\n", stderr);
exit(1);
}
const char * const af_name = argv[1];
int af = AF_UNSPEC;
#if defined(AF_INET)
if (strcmp(af_name, "inet") == 0) {
af = AF_INET;
}
#endif
#if defined(AF_INET6)
if (strcmp(af_name, "inet6") == 0) {
af = AF_INET6;
}
#endif
if (af == AF_UNSPEC) {
fprintf(stderr, "Unsupported address family: %s\n", af_name);
exit(1);
}
struct addrinfo hint;
bzero(&hint,sizeof(hint));
hint.ai_family = af;
hint.ai_protocol = IPPROTO_TCP;
hint.ai_socktype = SOCK_STREAM;
hint.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
struct addrinfo *pinfo;
const int err = getaddrinfo(NULL, "7001", &hint, &pinfo);
return err != 0;
}