Use getnameinfo() instead of deprecated gethostbyaddr()
Signed-off-by: Shyam Saini <mayhs11saini@xxxxxxxxx>
---
libxtables/xtables.c | 25 ++++++++++++++++++++-----
1 file changed, 20 insertions(+), 5 deletions(-)
diff --git a/libxtables/xtables.c b/libxtables/xtables.c
index 921dfe9..338e325 100644
--- a/libxtables/xtables.c
+++ b/libxtables/xtables.c
@@ -1210,13 +1210,28 @@ const char *xtables_ipaddr_to_numeric(const struct in_addr *addrp)
static const char *ipaddr_to_host(const struct in_addr *addr)
{
- struct hostent *host;
+ static char hostname[NI_MAXHOST];
+ struct sockaddr_in saddr;
+ int err;
- host = gethostbyaddr(addr, sizeof(struct in_addr), AF_INET);
- if (host == NULL)
- return NULL;
+ memset(&saddr, 0, sizeof(struct sockaddr_in));
+ memcpy(&saddr.sin_addr, addr, sizeof(*addr));
+ saddr.sin_family = AF_INET;
+
+ err = getnameinfo((const void *)&saddr, sizeof(struct sockaddr_in),
+ hostname, sizeof(hostname) - 1, NULL, 0, 0);
+
+ if (err != 0) {
+#ifdef DEBUG
+ fprintf(stderr,"IP2Name: %s\n",gai_strerror(err));
+#endif
+ return NULL;
+ }
- return host->h_name;
+#ifdef DEBUG
+ fprintf (stderr, "\naddr2host: %s\n", hostname);
+#endif
+ return hostname;
}
static const char *ipaddr_to_network(const struct in_addr *addr)
--
2.7.4
--
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