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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 17:27:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 17:27:58 +0000 |
commit | 215f178c88ad419caba94669c75111229bb978b8 (patch) | |
tree | 381a5f4c2cba30461ef20561b5bf81bf73ac6d2a /force-ip-protocol-ipv4-or-ipv6.c | |
parent | Initial commit. (diff) | |
download | force-ip-protocol-215f178c88ad419caba94669c75111229bb978b8.tar.xz force-ip-protocol-215f178c88ad419caba94669c75111229bb978b8.zip |
Adding upstream version 0.2.0.upstream/0.2.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'force-ip-protocol-ipv4-or-ipv6.c')
-rw-r--r-- | force-ip-protocol-ipv4-or-ipv6.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/force-ip-protocol-ipv4-or-ipv6.c b/force-ip-protocol-ipv4-or-ipv6.c new file mode 100644 index 0000000..bd366ff --- /dev/null +++ b/force-ip-protocol-ipv4-or-ipv6.c @@ -0,0 +1,50 @@ +/* + 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)); +} |