static char *add_name(char *old, const char *add);
static void client_init(nfs_client *clp, const char *hname,
struct hostent *hp);
-static int client_checkaddr(nfs_client *clp, struct in_addr addr);
nfs_client *clientlist[MCL_MAXTYPES] = { NULL, };
}
/*
- * Match a host (given its hostent record) to a client record. This
- * is usually called from mountd.
+ * Check each address listed in @hp against the subnetwork or
+ * host address stored in @clp. Return 1 if an address in @hp
+ * matches the host address stored in @clp, otherwise zero.
*/
-int
-client_check(nfs_client *clp, struct hostent *hp)
+static int
+check_subnetwork(const nfs_client *clp, const struct hostent *hp)
{
- char *hname = (char *) hp->h_name;
- char *cname = clp->m_hostname;
- char **ap;
+ struct in_addr addr;
+ char **ap;
- switch (clp->m_type) {
- case MCL_FQDN:
- return check_fqdn(clp, hp);
- case MCL_SUBNETWORK:
- for (ap = hp->h_addr_list; *ap; ap++) {
- if (client_checkaddr(clp, *(struct in_addr *) *ap))
- return 1;
- }
- return 0;
- case MCL_WILDCARD:
- if (wildmat(hname, cname))
+ for (ap = hp->h_addr_list; *ap; ap++) {
+ addr = *(struct in_addr *)*ap;
+
+ if (!((clp->m_addrlist[0].s_addr ^ addr.s_addr) &
+ clp->m_addrlist[1].s_addr))
return 1;
- else {
- for (ap = hp->h_aliases; *ap; ap++)
- if (wildmat(*ap, cname))
- return 1;
- }
- return 0;
- case MCL_NETGROUP:
-#ifdef HAVE_INNETGR
- {
- char *dot;
- int match, i;
- struct hostent *nhp = NULL;
- struct sockaddr_in addr;
-
- /* First, try to match the hostname without
- * splitting off the domain */
- if (innetgr(cname+1, hname, NULL, NULL))
- return 1;
+ }
+ return 0;
+}
- /* try the aliases as well */
- for (i = 0; hp->h_aliases[i]; i++) {
- if (innetgr(cname+1, hp->h_aliases[i], NULL, NULL))
- return 1;
- }
+/*
+ * Check if a wildcard nfs_client record matches the canonical name
+ * or the aliases of a host. Return 1 if a match is found, otherwise
+ * zero.
+ */
+static int
+check_wildcard(const nfs_client *clp, const struct hostent *hp)
+{
+ char *cname = clp->m_hostname;
+ char *hname = hp->h_name;
+ char **ap;
- /* If hname is ip address convert to FQDN */
- if (inet_aton(hname, &addr.sin_addr) &&
- (nhp = gethostbyaddr((const char *)&(addr.sin_addr),
- sizeof(addr.sin_addr), AF_INET))) {
- hname = (char *)nhp->h_name;
- if (innetgr(cname+1, hname, NULL, NULL))
- return 1;
- }
+ if (wildmat(hname, cname))
+ return 1;
- /* Okay, strip off the domain (if we have one) */
- if ((dot = strchr(hname, '.')) == NULL)
- return 0;
+ /* See if hname aliases listed in /etc/hosts or nis[+]
+ * match the requested wildcard */
+ for (ap = hp->h_aliases; *ap; ap++) {
+ if (wildmat(*ap, cname))
+ return 1;
+ }
- *dot = '\0';
- match = innetgr(cname+1, hname, NULL, NULL);
- *dot = '.';
+ return 0;
+}
- return match;
- }
-#else
- return 0;
-#endif
- case MCL_ANONYMOUS:
+/*
+ * Check if @hp's hostname or aliases fall in a given netgroup.
+ * Return 1 if @hp represents a host in the netgroup, otherwise zero.
+ */
+#ifdef HAVE_INNETGR
+static int
+check_netgroup(const nfs_client *clp, const struct hostent *hp)
+{
+ const char *netgroup = clp->m_hostname + 1;
+ const char *hname = hp->h_name;
+ struct hostent *nhp = NULL;
+ struct sockaddr_in addr;
+ int match, i;
+ char *dot;
+
+ /* First, try to match the hostname without
+ * splitting off the domain */
+ if (innetgr(netgroup, hname, NULL, NULL))
return 1;
- case MCL_GSS:
- return 0;
- default:
- xlog(L_FATAL, "internal: bad client type %d", clp->m_type);
+
+ /* See if hname aliases listed in /etc/hosts or nis[+]
+ * match the requested netgroup */
+ for (i = 0; hp->h_aliases[i]; i++) {
+ if (innetgr(netgroup, hp->h_aliases[i], NULL, NULL))
+ return 1;
}
+ /* If hname is ip address convert to FQDN */
+ if (inet_aton(hname, &addr.sin_addr) &&
+ (nhp = gethostbyaddr((const char *)&(addr.sin_addr),
+ sizeof(addr.sin_addr), AF_INET))) {
+ hname = nhp->h_name;
+ if (innetgr(netgroup, hname, NULL, NULL))
+ return 1;
+ }
+
+ /* Okay, strip off the domain (if we have one) */
+ dot = strchr(hname, '.');
+ if (dot == NULL)
+ return 0;
+
+ *dot = '\0';
+ match = innetgr(netgroup, hname, NULL, NULL);
+ *dot = '.';
+
+ return match;
+}
+#else /* !HAVE_INNETGR */
+static int
+check_netgroup(__attribute__((unused)) const nfs_client *clp,
+ __attribute__((unused)) const struct hostent *hp)
+{
return 0;
}
+#endif /* !HAVE_INNETGR */
-static int
-client_checkaddr(nfs_client *clp, struct in_addr addr)
+/**
+ * client_check - check if IP address information matches a cached nfs_client
+ * @clp: pointer to a cached nfs_client record
+ * @hp: pointer to hostent containing host IP information
+ *
+ * Returns 1 if the address information matches the cached nfs_client,
+ * otherwise zero.
+ */
+int
+client_check(nfs_client *clp, struct hostent *hp)
{
switch (clp->m_type) {
+ case MCL_FQDN:
+ return check_fqdn(clp, hp);
case MCL_SUBNETWORK:
- return !((clp->m_addrlist[0].s_addr ^ addr.s_addr)
- & clp->m_addrlist[1].s_addr);
+ return check_subnetwork(clp, hp);
+ case MCL_WILDCARD:
+ return check_wildcard(clp, hp);
+ case MCL_NETGROUP:
+ return check_netgroup(clp, hp);
+ case MCL_ANONYMOUS:
+ return 1;
+ case MCL_GSS:
+ return 0;
+ default:
+ xlog(D_GENERAL, "%s: unrecognized client type: %d",
+ __func__, clp->m_type);
}
+
return 0;
}
projects / nfs-utils.git / blobdiff