Replace gethostbyname() with getaddrinfo() as getaddrinfo()
deprecates the former and allows programs to eliminate
IPv4-versus-IPv6 dependencies.
Signed-off-by: Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
extensions/libxt_mangle.c | 28 ++++++++++++++++++----------
1 file changed, 18 insertions(+), 10 deletions(-)
diff --git a/extensions/libxt_mangle.c b/extensions/libxt_mangle.c
index 4b20feb..360742b 100644
--- a/extensions/libxt_mangle.c
+++ b/extensions/libxt_mangle.c
@@ -74,22 +74,30 @@ static void inaddrcpy(struct in_addr *dst, struct in_addr *src)
static struct in_addr *host_to_addr(const char *name, unsigned int *naddr)
{
- struct hostent *host;
struct in_addr *addr;
+ struct addrinfo hints;
+ struct addrinfo *res, *p;
+ int err;
unsigned int i;
- *naddr = 0;
- if ((host = gethostbyname(name)) != NULL) {
- if (host->h_addrtype != AF_INET ||
- host->h_length != sizeof(struct in_addr))
- return (struct in_addr *) NULL;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_CANONNAME;
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_RAW;
- while (host->h_addr_list[*naddr] != (char *) NULL)
+ *naddr = 0;
+ err = getaddrinfo(name, NULL, &hints, &res);
+ if (err != 0)
+ return NULL;
+ else {
+ for (p = res; p != NULL; p = p->ai_next)
(*naddr)++;
addr = xtables_calloc(*naddr, sizeof(struct in_addr));
- for (i = 0; i < *naddr; i++)
- inaddrcpy(&(addr[i]),
- (struct in_addr *) host->h_addr_list[i]);
+ for (i = 0, p = res; p != NULL; p = p->ai_next)
+ memcpy(&addr[i++],
+ &((const struct sockaddr_in *)p->ai_addr)->sin_addr,
+ sizeof(struct in_addr));
+ freeaddrinfo(res);
return addr;
}
--
2.7.4
--
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