kernel: partially revert e9efb1125a15, default inet mask
When no mask is supplied to the ioctl adding an Internet interface address, revert to using the historical class mask rather than a single default. Similarly for the NFS bootp code. MFC after: 3 weeks Reviewed by: melifaro glebius Differential Revision: https://reviews.freebsd.org/D32951
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@ -35,6 +35,8 @@
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define IN_HISTORICAL_NETS /* include class masks */
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#include <sys/param.h>
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#include <sys/eventhandler.h>
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#include <sys/systm.h>
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@ -467,17 +469,24 @@ in_aifaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td)
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ia->ia_sockmask = *mask;
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ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr);
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} else {
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in_addr_t i = ntohl(addr->sin_addr.s_addr);
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/*
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* If netmask isn't supplied, use default for now.
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* If netmask isn't supplied, use historical default.
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* This is deprecated for interfaces other than loopback
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* or point-to-point; warn in other cases. In the future
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* we should return an error rather than warning.
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*/
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if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0)
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printf("%s: set address: WARNING: network mask "
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" should be specified; using default mask\n",
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"should be specified; using historical default\n",
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ifp->if_xname);
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ia->ia_subnetmask = IN_NETMASK_DEFAULT;
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if (IN_CLASSA(i))
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ia->ia_subnetmask = IN_CLASSA_NET;
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else if (IN_CLASSB(i))
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ia->ia_subnetmask = IN_CLASSB_NET;
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else
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ia->ia_subnetmask = IN_CLASSC_NET;
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ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask);
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}
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ia->ia_subnet = ntohl(addr->sin_addr.s_addr) & ia->ia_subnetmask;
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@ -42,6 +42,8 @@
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* $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
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*/
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#define IN_HISTORICAL_NETS /* include class masks */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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@ -1486,11 +1488,16 @@ bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
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if (ifctx->gotnetmask == 0) {
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/*
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* If there is no netmask, use a default, but we really
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* need the right mask from the server.
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* If there is no netmask, use historical default,
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* but we really need the right mask from the server.
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*/
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printf("%s: no netmask received!\n", ifctx->ireq.ifr_name);
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ifctx->netmask.sin_addr.s_addr = htonl(IN_NETMASK_DEFAULT);
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if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
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ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
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else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
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ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
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else
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ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
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}
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}
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