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Fix for netmask('x.x.x.x/0') is 255.255.255.255 instead of 0.0.0.0

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This is because (-1) << 32 is -1 (Only intel arc. has been checked)

Oleg Sharoiko
This commit is contained in:
Bruce Momjian
1999-09-23 17:42:23 +00:00
parent 337ab803a2
commit dabc3f31b5
2 changed files with 4 additions and 2 deletions
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5
src/backend/utils/adt/network.c
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@ -3,7 +3,7 @@
* is for IP V4 CIDR notation, but prepared for V6: just
* add the necessary bits where the comments indicate.
*
* $Id: network.c,v 1.15 1999/07/17 20:17:58 momjian Exp $
* $Id: network.c,v 1.16 1999/09/23 17:42:23 momjian Exp $
* Jon Postel RIP 16 Oct 1998
*/
@ -448,7 +448,8 @@ network_netmask(inet *ip)
if (ip_family(ip) == AF_INET)
{
/* It's an IP V4 address: */
int addr = htonl((-1 << (32 - ip_bits(ip))) & 0xffffffff);
int addr = htonl(ip_bits(ip) ?
(-1 << (32 - ip_bits(ip))) & 0xffffffff : 0x00000000);
if (inet_net_ntop(AF_INET, &addr, 32, tmp, sizeof(tmp)) == NULL)
elog(ERROR, "unable to print netmask (%s)", strerror(errno));