2 * support/export/client.c
4 * Maintain list of nfsd clients.
6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
11 #include <sys/types.h>
12 #include <netinet/in.h>
13 #include <arpa/inet.h>
22 /* netgroup stuff never seems to be defined in any header file. Linux is
25 #if !defined(__GLIBC__) || __GLIBC__ < 2
26 extern int innetgr(char *netgr, char *host, char *, char *);
28 static void client_init(nfs_client *clp, const char *hname,
30 static int client_checkaddr(nfs_client *clp, struct in_addr addr);
32 nfs_client *clientlist[MCL_MAXTYPES] = { NULL, };
36 client_lookup(char *hname)
38 nfs_client *clp = NULL;
40 struct hostent *hp = NULL;
42 htype = client_gettype(hname);
44 if (htype == MCL_FQDN) {
46 hp = gethostbyname(hname);
47 if (hp == NULL || hp->h_addrtype != AF_INET) {
48 xlog(L_ERROR, "%s has non-inet addr", hname);
51 /* make sure we have canonical name */
52 hp2 = hostent_dup(hp);
53 hp = gethostbyaddr(hp2->h_addr, hp2->h_length,
61 hname = (char *) hp->h_name;
63 for (clp = clientlist[htype]; clp; clp = clp->m_next) {
64 if (client_check(clp, hp))
68 for (clp = clientlist[htype]; clp; clp = clp->m_next) {
69 if (strcmp(hname, clp->m_hostname)==0)
75 clp = (nfs_client *) xmalloc(sizeof(*clp));
76 memset(clp, 0, sizeof(*clp));
78 client_init(clp, hname, NULL);
82 if (htype == MCL_FQDN && clp->m_naddr == 0 && hp != NULL) {
83 char **ap = hp->h_addr_list;
86 for (i = 0; *ap && i < NFSCLNT_ADDRMAX; i++, ap++)
87 clp->m_addrlist[i] = *(struct in_addr *)*ap;
98 client_dup(nfs_client *clp, struct hostent *hp)
102 new = (nfs_client *) xmalloc(sizeof(*new));
103 memcpy(new, clp, sizeof(*new));
104 new->m_type = MCL_FQDN;
106 client_init(new, (char *) hp->h_name, hp);
112 client_init(nfs_client *clp, const char *hname, struct hostent *hp)
115 strncpy(clp->m_hostname, hp->h_name,
116 sizeof (clp->m_hostname) - 1);
118 strncpy(clp->m_hostname, hname,
119 sizeof (clp->m_hostname) - 1);
121 clp->m_hostname[sizeof (clp->m_hostname) - 1] = '\0';
126 if (clp->m_type == MCL_SUBNETWORK) {
127 char *cp = strchr(clp->m_hostname, '/');
130 clp->m_addrlist[0].s_addr = inet_addr(clp->m_hostname);
131 if (strchr(cp + 1, '.')) {
132 clp->m_addrlist[1].s_addr = inet_addr(cp+1);
135 int netmask = atoi(cp + 1);
136 if (0 < netmask && netmask <= 32) {
137 clp->m_addrlist[1].s_addr =
138 htonl ((uint32_t) ~0 << (32 - netmask));
141 xlog(L_FATAL, "invalid netmask `%s' for %s",
142 cp + 1, clp->m_hostname);
150 char **ap = hp->h_addr_list;
153 for (i = 0; *ap && i < NFSCLNT_ADDRMAX; i++, ap++) {
154 clp->m_addrlist[i] = *(struct in_addr *)*ap;
161 client_add(nfs_client *clp)
165 if (clp->m_type < 0 || clp->m_type >= MCL_MAXTYPES)
166 xlog(L_FATAL, "unknown client type in client_add");
167 cpp = clientlist + clp->m_type;
169 cpp = &((*cpp)->m_next);
175 client_release(nfs_client *clp)
177 if (clp->m_count <= 0)
178 xlog(L_FATAL, "client_free: m_count <= 0!");
185 nfs_client *clp, **head;
188 for (i = 0; i < MCL_MAXTYPES; i++) {
189 head = clientlist + i;
191 *head = (clp = *head)->m_next;
198 client_find(struct hostent *hp)
203 for (i = 0; i < MCL_MAXTYPES; i++) {
204 for (clp = clientlist[i]; clp; clp = clp->m_next) {
205 if (!client_check(clp, hp))
208 if (clp->m_type == MCL_FQDN)
210 return client_dup(clp, hp);
220 * Match a host (given its hostent record) to a client record. This
221 * is usually called from mountd.
224 client_check(nfs_client *clp, struct hostent *hp)
226 char *hname = (char *) hp->h_name;
227 char *cname = clp->m_hostname;
230 switch (clp->m_type) {
233 for (ap = hp->h_addr_list; *ap; ap++) {
234 if (client_checkaddr(clp, *(struct in_addr *) *ap))
239 if (wildmat(hname, cname))
242 for (ap = hp->h_aliases; *ap; ap++)
243 if (wildmat(*ap, cname))
252 struct hostent *nhp = NULL;
253 struct sockaddr_in addr;
255 /* First, try to match the hostname without
256 * splitting off the domain */
257 if (innetgr(cname+1, hname, NULL, NULL))
260 /* If hname is ip address convert to FQDN */
261 if (inet_aton(hname, &addr.sin_addr) &&
262 (nhp = gethostbyaddr((const char *)&(addr.sin_addr),
263 sizeof(addr.sin_addr), AF_INET))) {
264 hname = (char *)nhp->h_name;
265 if (innetgr(cname+1, hname, NULL, NULL))
269 /* Okay, strip off the domain (if we have one) */
270 if ((dot = strchr(hname, '.')) == NULL)
274 match = innetgr(cname+1, hname, NULL, NULL);
285 xlog(L_FATAL, "internal: bad client type %d", clp->m_type);
292 client_checkaddr(nfs_client *clp, struct in_addr addr)
296 switch (clp->m_type) {
298 for (i = 0; i < clp->m_naddr; i++) {
299 if (clp->m_addrlist[i].s_addr == addr.s_addr)
304 return !((clp->m_addrlist[0].s_addr ^ addr.s_addr)
305 & clp->m_addrlist[1].s_addr);
311 client_gettype(char *ident)
315 if (ident[0] == '\0' || strcmp(ident, "*")==0)
316 return MCL_ANONYMOUS;
317 if (ident[0] == '@') {
319 xlog(L_WARNING, "netgroup support not compiled in");
323 for (sp = ident; *sp; sp++) {
324 if (*sp == '*' || *sp == '?' || *sp == '[')
327 return MCL_SUBNETWORK;
328 if (*sp == '\\' && sp[1])