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/*
force-ip-protocol
Copyright (C) 2023 Thorsten Alteholz
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, version 2 of the License.
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/>.
usage: LD_PRELOAD=/path/to/library.so program args ...
*/
#include <config.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#endif
int getaddrinfo(const char *hostname, const char *servname,
const struct addrinfo *hints, struct addrinfo **res)
{
int (*getaddrinfo_org)();
struct addrinfo *hints2 = (struct addrinfo *) hints;
getaddrinfo_org = dlsym(RTLD_NEXT, "getaddrinfo");
#if defined USE_IPV4
hints2->ai_family = PF_INET;
#elif defined USE_IPV6
hints2->ai_family = PF_INET6;
#else
#error You must define either USE_IPV4 or USE_IPV6.
#endif
return (getaddrinfo_org(hostname, servname, hints2, res));
}
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