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nameserv: require getaddrinfo() and getnameinfo()

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Remove support for the long-deprecated gethostbyname() and
gethostbyaddr() functions.
This commit is contained in:
Miroslav Lichvar 2021-03-02 16:55:37 +01:00
parent 2d39a12f51
commit 10c760a80c
2 changed files with 3 additions and 61 deletions
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5
configure vendored
View file

@ -684,10 +684,11 @@ if [ $try_clock_gettime = "1" ]; then
fi
fi
if test_code 'getaddrinfo()' 'sys/types.h sys/socket.h netdb.h' '' "$LIBS" \
if ! test_code 'getaddrinfo()' 'sys/types.h sys/socket.h netdb.h' '' "$LIBS" \
'return getaddrinfo(0, 0, 0, 0);'
then
add_def HAVE_GETADDRINFO
echo "error: getaddrinfo() not found"
exit 1
fi
if [ $feat_asyncdns = "1" ] && \

59
nameserv.c
View file

@ -50,7 +50,6 @@ DNS_SetAddressFamily(int family)
DNS_Status
DNS_Name2IPAddress(const char *name, IPAddr *ip_addrs, int max_addrs)
{
#ifdef HAVE_GETADDRINFO
struct addrinfo hints, *res, *ai;
int i, result;
@ -113,42 +112,6 @@ DNS_Name2IPAddress(const char *name, IPAddr *ip_addrs, int max_addrs)
freeaddrinfo(res);
return !max_addrs || ip_addrs[0].family != IPADDR_UNSPEC ? DNS_Success : DNS_Failure;
#else
struct hostent *host;
int i;
if (address_family != IPADDR_UNSPEC && address_family != IPADDR_INET4)
return DNS_Failure;
max_addrs = MIN(max_addrs, DNS_MAX_ADDRESSES);
host = gethostbyname(name);
if (host == NULL) {
if (h_errno == TRY_AGAIN)
return DNS_TryAgain;
} else {
if (host->h_addrtype != AF_INET || !host->h_addr_list[0])
return DNS_Failure;
for (i = 0; host->h_addr_list[i] && i < max_addrs; i++) {
ip_addrs[i].family = IPADDR_INET4;
ip_addrs[i].addr.in4 = ntohl(*(uint32_t *)host->h_addr_list[i]);
}
for (; i < max_addrs; i++)
ip_addrs[i].family = IPADDR_UNSPEC;
return DNS_Success;
}
#ifdef FORCE_DNSRETRY
return DNS_TryAgain;
#else
return DNS_Failure;
#endif
#endif
}
/* ================================================== */
@ -157,8 +120,6 @@ int
DNS_IPAddress2Name(IPAddr *ip_addr, char *name, int len)
{
char *result = NULL;
#ifdef FEAT_IPV6
struct sockaddr_in6 in6;
IPSockAddr ip_saddr;
socklen_t slen;
@ -170,26 +131,6 @@ DNS_IPAddress2Name(IPAddr *ip_addr, char *name, int len)
slen = SCK_IPSockAddrToSockaddr(&ip_saddr, (struct sockaddr *)&in6, sizeof (in6));
if (!getnameinfo((struct sockaddr *)&in6, slen, hbuf, sizeof (hbuf), NULL, 0, 0))
result = hbuf;
#else
struct hostent *host;
uint32_t addr;
switch (ip_addr->family) {
case IPADDR_INET4:
addr = htonl(ip_addr->addr.in4);
host = gethostbyaddr((const char *) &addr, sizeof (ip_addr), AF_INET);
break;
#ifdef FEAT_IPV6
case IPADDR_INET6:
host = gethostbyaddr((const void *) ip_addr->addr.in6, sizeof (ip_addr->addr.in6), AF_INET6);
break;
#endif
default:
host = NULL;
}
if (host)
result = host->h_name;
#endif
if (result == NULL)
result = UTI_IPToString(ip_addr);