-/*
+/*
This module is an adaption of code from the tcpd-1.4 package written
by Wietse Venema, Eindhoven University of Technology, The Netherlands.
The code has been considerably changed from the original. Bug reports
should be sent to samba@samba.org
+
+ Updated for IPv6 by Jeremy Allison (C) 2007.
*/
#include "includes.h"
+#include "memcache.h"
-#define FAIL (-1)
-
-#define ALLONES ((uint32)0xFFFFFFFF)
+#define NAME_INDEX 0
+#define ADDR_INDEX 1
/* masked_match - match address against netnumber/netmask */
-static BOOL masked_match(const char *tok, const char *slash, const char *s)
+static bool masked_match(const char *tok, const char *slash, const char *s)
{
- uint32 net;
- uint32 mask;
- uint32 addr;
- fstring tok_cpy;
+ struct sockaddr_storage ss_mask;
+ struct sockaddr_storage ss_tok;
+ struct sockaddr_storage ss_host;
+ char *tok_copy = NULL;
+
+ if (!interpret_string_addr(&ss_host, s, 0)) {
+ return false;
+ }
- if ((addr = interpret_addr(s)) == INADDR_NONE)
- return (False);
+ if (*tok == '[') {
+ /* IPv6 address - remove braces. */
+ tok_copy = SMB_STRDUP(tok+1);
+ if (!tok_copy) {
+ return false;
+ }
+ /* Remove the terminating ']' */
+ tok_copy[PTR_DIFF(slash,tok)-1] = '\0';
+ } else {
+ tok_copy = SMB_STRDUP(tok);
+ if (!tok_copy) {
+ return false;
+ }
+ /* Remove the terminating '/' */
+ tok_copy[PTR_DIFF(slash,tok)] = '\0';
+ }
- fstrcpy(tok_cpy, tok);
- tok_cpy[PTR_DIFF(slash,tok)] = '\0';
- net = interpret_addr(tok_cpy);
- tok_cpy[PTR_DIFF(slash,tok)] = '/';
+ if (!interpret_string_addr(&ss_tok, tok_copy, 0)) {
+ SAFE_FREE(tok_copy);
+ return false;
+ }
+
+ SAFE_FREE(tok_copy);
if (strlen(slash + 1) > 2) {
- mask = interpret_addr(slash + 1);
+ if (!interpret_string_addr(&ss_mask, slash+1, 0)) {
+ return false;
+ }
} else {
- mask = (uint32)((ALLONES >> atoi(slash + 1)) ^ ALLONES);
- /* convert to network byte order */
- mask = htonl(mask);
+ char *endp = NULL;
+ unsigned long val = strtoul(slash+1, &endp, 0);
+ if (slash+1 == endp || (endp && *endp != '\0')) {
+ return false;
+ }
+ if (!make_netmask(&ss_mask, &ss_tok, val)) {
+ return false;
+ }
}
- if (net == INADDR_NONE || mask == INADDR_NONE) {
- DEBUG(0,("access: bad net/mask access control: %s\n", tok));
- return (False);
- }
-
- return ((addr & mask) == net);
+ return same_net((struct sockaddr *)(void *)&ss_host,
+ (struct sockaddr *)(void *)&ss_tok,
+ (struct sockaddr *)(void *)&ss_mask);
}
-/* string_match - match string against token */
-static BOOL string_match(const char *tok,const char *s, char *invalid_char)
+/* string_match - match string s against token tok */
+static bool string_match(const char *tok,const char *s)
{
size_t tok_len;
size_t str_len;
const char *cut;
- *invalid_char = '\0';
-
- /* Return True if a token has the magic value "ALL". Return
- * FAIL if the token is "FAIL". If the token starts with a "."
- * (domain name), return True if it matches the last fields of
+ /* Return true if a token has the magic value "ALL". Return
+ * true if the token is "FAIL". If the token starts with a "."
+ * (domain name), return true if it matches the last fields of
* the string. If the token has the magic value "LOCAL",
- * return True if the string does not contain a "."
+ * return true if the string does not contain a "."
* character. If the token ends on a "." (network number),
- * return True if it matches the first fields of the
+ * return true if it matches the first fields of the
* string. If the token begins with a "@" (netgroup name),
- * return True if the string is a (host) member of the
- * netgroup. Return True if the token fully matches the
+ * return true if the string is a (host) member of the
+ * netgroup. Return true if the token fully matches the
* string. If the token is a netnumber/netmask pair, return
- * True if the address is a member of the specified subnet.
+ * true if the address is a member of the specified subnet.
*/
if (tok[0] == '.') { /* domain: match last fields */
if ((str_len = strlen(s)) > (tok_len = strlen(tok))
- && strequal(tok, s + str_len - tok_len))
- return (True);
+ && strequal(tok, s + str_len - tok_len)) {
+ return true;
+ }
} else if (tok[0] == '@') { /* netgroup: look it up */
#ifdef HAVE_NETGROUP
- static char *mydomain = NULL;
+ DATA_BLOB tmp;
+ char *mydomain = NULL;
char *hostname = NULL;
- BOOL netgroup_ok = False;
+ bool netgroup_ok = false;
- if (!mydomain)
+ if (memcache_lookup(
+ NULL, SINGLETON_CACHE,
+ data_blob_string_const_null("yp_default_domain"),
+ &tmp)) {
+
+ SMB_ASSERT(tmp.length > 0);
+ mydomain = (tmp.data[0] == '\0')
+ ? NULL : (char *)tmp.data;
+ }
+ else {
yp_get_default_domain(&mydomain);
+ memcache_add(
+ NULL, SINGLETON_CACHE,
+ data_blob_string_const_null("yp_default_domain"),
+ data_blob_string_const_null(mydomain?mydomain:""));
+ }
+
if (!mydomain) {
- DEBUG(0,("Unable to get default yp domain.\n"));
- return False;
+ DEBUG(0,("Unable to get default yp domain. "
+ "Try without it.\n"));
}
- if (!(hostname = strdup(s))) {
+ if (!(hostname = SMB_STRDUP(s))) {
DEBUG(1,("out of memory for strdup!\n"));
- return False;
+ return false;
}
-
+
netgroup_ok = innetgr(tok + 1, hostname, (char *) 0, mydomain);
-
- DEBUG(5,("looking for %s of domain %s in netgroup %s gave %s\n",
+
+ DEBUG(5,("looking for %s of domain %s in netgroup %s gave %s\n",
hostname,
- mydomain,
+ mydomain?mydomain:"(ANY)",
tok+1,
BOOLSTR(netgroup_ok)));
SAFE_FREE(hostname);
-
+
if (netgroup_ok)
- return(True);
+ return true;
#else
DEBUG(0,("access: netgroup support is not configured\n"));
- return (False);
+ return false;
#endif
} else if (strequal(tok, "ALL")) { /* all: match any */
- return (True);
+ return true;
} else if (strequal(tok, "FAIL")) { /* fail: match any */
- return (FAIL);
+ return true;
} else if (strequal(tok, "LOCAL")) { /* local: no dots */
- if (strchr_m(s, '.') == 0 && !strequal(s, "unknown"))
- return (True);
+ if (strchr_m(s, '.') == 0 && !strequal(s, "unknown")) {
+ return true;
+ }
} else if (strequal(tok, s)) { /* match host name or address */
- return (True);
+ return true;
} else if (tok[(tok_len = strlen(tok)) - 1] == '.') { /* network */
- if (strncmp(tok, s, tok_len) == 0)
- return (True);
+ if (strncmp(tok, s, tok_len) == 0) {
+ return true;
+ }
} else if ((cut = strchr_m(tok, '/')) != 0) { /* netnumber/netmask */
- if (isdigit((int)s[0]) && masked_match(tok, cut, s))
- return (True);
- } else if (strchr_m(tok, '*') != 0) {
- *invalid_char = '*';
- } else if (strchr_m(tok, '?') != 0) {
- *invalid_char = '?';
+ if ((isdigit(s[0]) && strchr_m(tok, '.') != NULL) ||
+ (tok[0] == '[' && cut > tok && cut[-1] == ']') ||
+ ((isxdigit(s[0]) || s[0] == ':') &&
+ strchr_m(tok, ':') != NULL)) {
+ /* IPv4/netmask or
+ * [IPv6:addr]/netmask or IPv6:addr/netmask */
+ return masked_match(tok, cut, s);
+ }
+ } else if (strchr_m(tok, '*') != 0 || strchr_m(tok, '?')) {
+ return unix_wild_match(tok, s);
}
- return (False);
+ return false;
}
/* client_match - match host name and address against token */
-static BOOL client_match(const char *tok, const char *item)
+bool client_match(const char *tok, const void *item)
{
const char **client = (const char **)item;
- BOOL match;
- char invalid_char = '\0';
/*
* Try to match the address first. If that fails, try to match the host
* name if available.
*/
- if ((match = string_match(tok, client[1], &invalid_char)) == 0) {
- if(invalid_char)
- DEBUG(0,("client_match: address match failing due to invalid character '%c' found in \
-token '%s' in an allow/deny hosts line.\n", invalid_char, tok ));
+ if (string_match(tok, client[ADDR_INDEX])) {
+ return true;
+ }
- if (client[0][0] != 0)
- match = string_match(tok, client[0], &invalid_char);
+ if (strnequal(client[ADDR_INDEX],"::ffff:",7) &&
+ !strnequal(tok, "::ffff:",7)) {
+ /* client[ADDR_INDEX] is an IPv4 mapped to IPv6, but
+ * the list item is not. Try and match the IPv4 part of
+ * address only. This will happen a lot on IPv6 enabled
+ * systems with IPv4 allow/deny lists in smb.conf.
+ * Bug #5311. JRA.
+ */
+ if (string_match(tok, (client[ADDR_INDEX])+7)) {
+ return true;
+ }
+ }
- if(invalid_char)
- DEBUG(0,("client_match: address match failing due to invalid character '%c' found in \
-token '%s' in an allow/deny hosts line.\n", invalid_char, tok ));
+ if (client[NAME_INDEX][0] != 0) {
+ if (string_match(tok, client[NAME_INDEX])) {
+ return true;
+ }
}
- return (match);
+ return false;
}
/* list_match - match an item against a list of tokens with exceptions */
-static BOOL list_match(const char **list,const char *item,
- BOOL (*match_fn)(const char *, const char *))
+bool list_match(const char **list,const void *item,
+ bool (*match_fn)(const char *, const void *))
{
- BOOL match = False;
+ bool match = false;
- if (!list)
- return False;
+ if (!list) {
+ return false;
+ }
/*
* Process tokens one at a time. We have exhausted all possible matches
*/
for (; *list ; list++) {
- if (strequal(*list, "EXCEPT")) /* EXCEPT: give up */
+ if (strequal(*list, "EXCEPT")) {
+ /* EXCEPT: give up */
break;
- if ((match = (*match_fn) (*list, item))) /* True or FAIL */
+ }
+ if ((match = (*match_fn) (*list, item))) {
+ /* true or FAIL */
break;
+ }
}
- /* Process exceptions to True or FAIL matches. */
+ /* Process exceptions to true or FAIL matches. */
- if (match != False) {
- while (*list && !strequal(*list, "EXCEPT"))
+ if (match != false) {
+ while (*list && !strequal(*list, "EXCEPT")) {
list++;
+ }
for (; *list; list++) {
- if ((*match_fn) (*list, item)) /* Exception Found */
- return False;
+ if ((*match_fn) (*list, item)) {
+ /* Exception Found */
+ return false;
+ }
}
}
- return (match);
+ return match;
}
/* return true if access should be allowed */
-static BOOL allow_access_internal(const char **deny_list,const char **allow_list,
- const char *cname, const char *caddr)
+static bool allow_access_internal(const char **deny_list,
+ const char **allow_list,
+ const char *cname,
+ const char *caddr)
{
const char *client[2];
- client[0] = cname;
- client[1] = caddr;
+ client[NAME_INDEX] = cname;
+ client[ADDR_INDEX] = caddr;
/* if it is loopback then always allow unless specifically denied */
- if (strcmp(caddr, "127.0.0.1") == 0) {
+ if (strcmp(caddr, "127.0.0.1") == 0 || strcmp(caddr, "::1") == 0) {
/*
* If 127.0.0.1 matches both allow and deny then allow.
* Patch from Steve Langasek vorlon@netexpress.net.
*/
- if (deny_list &&
- list_match(deny_list,(const char *)client,client_match) &&
+ if (deny_list &&
+ list_match(deny_list,client,client_match) &&
(!allow_list ||
- !list_match(allow_list,(const char *)client, client_match))) {
- return False;
+ !list_match(allow_list,client, client_match))) {
+ return false;
}
- return True;
+ return true;
}
/* if theres no deny list and no allow list then allow access */
- if ((!deny_list || *deny_list == 0) &&
+ if ((!deny_list || *deny_list == 0) &&
(!allow_list || *allow_list == 0)) {
- return(True);
+ return true;
}
/* if there is an allow list but no deny list then allow only hosts
on the allow list */
- if (!deny_list || *deny_list == 0)
- return(list_match(allow_list,(const char *)client,client_match));
+ if (!deny_list || *deny_list == 0) {
+ return(list_match(allow_list,client,client_match));
+ }
/* if theres a deny list but no allow list then allow
all hosts not on the deny list */
- if (!allow_list || *allow_list == 0)
- return(!list_match(deny_list,(const char *)client,client_match));
+ if (!allow_list || *allow_list == 0) {
+ return(!list_match(deny_list,client,client_match));
+ }
/* if there are both types of list then allow all hosts on the
allow list */
- if (list_match(allow_list,(const char *)client,client_match))
- return (True);
+ if (list_match(allow_list,(const char *)client,client_match)) {
+ return true;
+ }
/* if there are both types of list and it's not on the allow then
allow it if its not on the deny */
- if (list_match(deny_list,(const char *)client,client_match))
- return (False);
-
- return (True);
+ if (list_match(deny_list,(const char *)client,client_match)) {
+ return false;
+ }
+
+ return true;
}
/* return true if access should be allowed */
-BOOL allow_access(const char **deny_list, const char **allow_list,
- const char *cname, const char *caddr)
+bool allow_access(const char **deny_list,
+ const char **allow_list,
+ const char *cname,
+ const char *caddr)
{
- BOOL ret;
+ bool ret;
char *nc_cname = smb_xstrdup(cname);
char *nc_caddr = smb_xstrdup(caddr);
-
+
ret = allow_access_internal(deny_list, allow_list, nc_cname, nc_caddr);
+ DEBUG(ret ? 3 : 0,
+ ("%s connection from %s (%s)\n",
+ ret ? "Allowed" : "Denied", nc_cname, nc_caddr));
+
SAFE_FREE(nc_cname);
SAFE_FREE(nc_caddr);
return ret;
}
-
-/* return true if the char* contains ip addrs only. Used to avoid
-gethostbyaddr() calls */
-
-static BOOL only_ipaddrs_in_list(const char** list)
-{
- BOOL only_ip = True;
-
- if (!list)
- return True;
-
- for (; *list ; list++) {
- /* factor out the special strings */
- if (strequal(*list, "ALL") || strequal(*list, "FAIL") ||
- strequal(*list, "EXCEPT")) {
- continue;
- }
-
- if (!is_ipaddress(*list)) {
- /*
- * if we failed, make sure that it was not because the token
- * was a network/netmask pair. Only network/netmask pairs
- * have a '/' in them
- */
- if ((strchr_m(*list, '/')) == NULL) {
- only_ip = False;
- DEBUG(3,("only_ipaddrs_in_list: list has non-ip address (%s)\n", *list));
- break;
- }
- }
- }
-
- return only_ip;
-}
-
-/* return true if access should be allowed to a service for a socket */
-BOOL check_access(int sock, const char **allow_list, const char **deny_list)
-{
- BOOL ret = False;
- BOOL only_ip = False;
-
- if ((!deny_list || *deny_list==0) && (!allow_list || *allow_list==0))
- ret = True;
-
- if (!ret) {
- /* bypass gethostbyaddr() calls if the lists only contain IP addrs */
- if (only_ipaddrs_in_list(allow_list) && only_ipaddrs_in_list(deny_list)) {
- only_ip = True;
- DEBUG (3, ("check_access: no hostnames in host allow/deny list.\n"));
- ret = allow_access(deny_list,allow_list, "", get_peer_addr(sock));
- } else {
- DEBUG (3, ("check_access: hostnames in host allow/deny list.\n"));
- ret = allow_access(deny_list,allow_list, get_peer_name(sock,True),
- get_peer_addr(sock));
- }
-
- if (ret) {
- DEBUG(2,("Allowed connection from %s (%s)\n",
- only_ip ? "" : get_peer_name(sock,True),
- get_peer_addr(sock)));
- } else {
- DEBUG(0,("Denied connection from %s (%s)\n",
- only_ip ? "" : get_peer_name(sock,True),
- get_peer_addr(sock)));
- }
- }
-
- return(ret);
-}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff