-/*
- * This function compares two net addresses by family and returns TRUE
- * if they are the same host.
- * If there is any doubt, return FALSE.
- * The AF_INET family is handled as a special case so that address mbufs
- * don't need to be saved to store "struct in_addr", which is only 4 bytes.
- */
-nfs_netaddr_match(family, haddr, hmask, nam)
- int family;
- union nethostaddr *haddr;
- union nethostaddr *hmask;
- struct mbuf *nam;
-{
- register struct sockaddr_in *inetaddr;
-#ifdef ISO
- register struct sockaddr_iso *isoaddr1, *isoaddr2;
-#endif
-
-
- switch (family) {
- case AF_INET:
- inetaddr = mtod(nam, struct sockaddr_in *);
- if (inetaddr->sin_family != AF_INET)
- return (0);
- if (hmask) {
- if ((inetaddr->sin_addr.s_addr & hmask->had_inetaddr) ==
- (haddr->had_inetaddr & hmask->had_inetaddr))
- return (1);
- } else if (inetaddr->sin_addr.s_addr == haddr->had_inetaddr)
- return (1);
- break;
-#ifdef ISO
- case AF_ISO:
- isoaddr1 = mtod(nam, struct sockaddr_iso *);
- if (isoaddr1->siso_family != AF_ISO)
- return (0);
- isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *);
- if (isoaddr1->siso_nlen > 0 &&
- isoaddr1->siso_nlen == isoaddr2->siso_nlen &&
- SAME_ISOADDR(isoaddr1, isoaddr2))
- return (1);
- break;
-#endif /* ISO */
- default:
- break;
- };
- return (0);
-}
-
-/*
- * Build hash lists of net addresses and hang them off the mount point.
- * Called by ufs_mount() to set up the lists of export addresses.
- */
-hang_addrlist(mp, argp)
- struct mount *mp;
- struct ufs_args *argp;
-{
- register struct netaddrhash *np, **hnp;
- register int i;
- struct ufsmount *ump;
- struct sockaddr *saddr;
- struct mbuf *nam, *msk = (struct mbuf *)0;
- union nethostaddr netmsk;
- int error;
-
- if (error = sockargs(&nam, (caddr_t)argp->saddr, argp->slen,
- MT_SONAME))
- return (error);
- saddr = mtod(nam, struct sockaddr *);
- ump = VFSTOUFS(mp);
- if (saddr->sa_family == AF_INET &&
- ((struct sockaddr_in *)saddr)->sin_addr.s_addr == INADDR_ANY) {
- m_freem(nam);
- if (mp->mnt_flag & MNT_DEFEXPORTED)
- return (EPERM);
- np = &ump->um_defexported;
- np->neth_exflags = argp->exflags;
- np->neth_anon = argp->anon;
- np->neth_anon.cr_ref = 1;
- mp->mnt_flag |= MNT_DEFEXPORTED;
- return (0);
- }
- if (argp->msklen > 0) {
- if (error = sockargs(&msk, (caddr_t)argp->smask, argp->msklen,
- MT_SONAME)) {
- m_freem(nam);
- return (error);
- }
-
- /*
- * Scan all the hash lists to check against duplications.
- * For the net list, try both masks to catch a subnet
- * of another network.
- */
- hnp = &ump->um_netaddr[NETMASK_HASH];
- np = *hnp;
- if (saddr->sa_family == AF_INET)
- netmsk.had_inetaddr =
- mtod(msk, struct sockaddr_in *)->sin_addr.s_addr;
- else
- netmsk.had_nam = msk;
- while (np) {
- if (nfs_netaddr_match(np->neth_family, &np->neth_haddr,
- &np->neth_hmask, nam) ||
- nfs_netaddr_match(np->neth_family, &np->neth_haddr,
- &netmsk, nam)) {
- m_freem(nam);
- m_freem(msk);
- return (EPERM);
- }
- np = np->neth_next;
- }
- for (i = 0; i < NETHASHSZ; i++) {
- np = ump->um_netaddr[i];
- while (np) {
- if (nfs_netaddr_match(np->neth_family, &np->neth_haddr,
- &netmsk, nam)) {
- m_freem(nam);
- m_freem(msk);
- return (EPERM);
- }
- np = np->neth_next;
- }
- }
- } else {
- hnp = &ump->um_netaddr[NETADDRHASH(saddr)];
- np = ump->um_netaddr[NETMASK_HASH];
- while (np) {
- if (nfs_netaddr_match(np->neth_family, &np->neth_haddr,
- &np->neth_hmask, nam)) {
- m_freem(nam);
- return (EPERM);
- }
- np = np->neth_next;
- }
- np = *hnp;
- while (np) {
- if (nfs_netaddr_match(np->neth_family, &np->neth_haddr,
- (union nethostaddr *)0, nam)) {
- m_freem(nam);
- return (EPERM);
- }
- np = np->neth_next;
- }
- }
- np = (struct netaddrhash *) malloc(sizeof(struct netaddrhash), M_NETADDR,
- M_WAITOK);
- np->neth_family = saddr->sa_family;
- if (saddr->sa_family == AF_INET) {
- np->neth_inetaddr = ((struct sockaddr_in *)saddr)->sin_addr.s_addr;
- m_freem(nam);
- if (msk) {
- np->neth_inetmask = netmsk.had_inetaddr;
- m_freem(msk);
- if (np->neth_inetaddr &~ np->neth_inetmask)
- return (EPERM);
- } else
- np->neth_inetmask = 0xffffffff;
- } else {
- np->neth_nam = nam;
- np->neth_msk = msk;
- }
- np->neth_exflags = argp->exflags;
- np->neth_anon = argp->anon;
- np->neth_anon.cr_ref = 1;
- np->neth_next = *hnp;
- *hnp = np;
- return (0);
-}
-
-/*
- * Free the net address hash lists that are hanging off the mount points.
- */
-free_addrlist(ump)
- struct ufsmount *ump;
-{
- register struct netaddrhash *np, *onp;
- register int i;
-
- for (i = 0; i <= NETHASHSZ; i++) {
- np = ump->um_netaddr[i];
- ump->um_netaddr[i] = (struct netaddrhash *)0;
- while (np) {
- onp = np;
- np = np->neth_next;
- if (onp->neth_family != AF_INET) {
- m_freem(onp->neth_nam);
- m_freem(onp->neth_msk);
- }
- free((caddr_t)onp, M_NETADDR);
- }
- }
-}
-
-/*
- * Generate a hash code for an iso host address. Used by NETADDRHASH() for
- * iso addresses.
- */
-iso_addrhash(saddr)
- struct sockaddr *saddr;
-{
-#ifdef ISO
- register struct sockaddr_iso *siso;
- register int i, sum;
-
- sum = 0;
- for (i = 0; i < siso->siso_nlen; i++)
- sum += siso->siso_data[i];
- return (sum & (NETHASHSZ - 1));
-#else
- return (0);
-#endif /* ISO */
-}
-
projects / unix-history / blobdiff