[SCM] Samba Shared Repository - branch v3-5-test updated
Karolin Seeger
kseeger at samba.org
Wed Apr 20 12:45:30 MDT 2011
The branch, v3-5-test has been updated
via 80078cb Fix is_myname_or_ipaddr() to be robust against strange DNS setups.
from 2167ac2 s3: Fix bug 8099 - setpwent() actually does endpwent() on FreeBSD
http://gitweb.samba.org/?p=samba.git;a=shortlog;h=v3-5-test
- Log -----------------------------------------------------------------
commit 80078cb6ef2e6976cb5ab25a86157bca22c836a2
Author: Jeremy Allison <jra at samba.org>
Date: Thu Mar 24 11:55:38 2011 -0700
Fix is_myname_or_ipaddr() to be robust against strange DNS setups.
If IPv6 DNS names are turned on, but Samba isn't configured to
listen on an IPv6 interface, then is_myname_or_ipaddr() can return
false on a valid DNS name that it should detect is our own. If the
IPv6 addr is returned by preference, then looking at the first addr
only causes is_myname_or_ipaddr() to fail. We need to look at all the
addresses returned by the DNS lookup and check all of them against
our interface list. This is an order N^2 lookup, but there shouldn't
be enough addresses to make this a practical problem.
Jeremy.
Fix bug #8038 - Connecting to a printer can return INVALID_PARAMETER when IPv6
DNS names are turned on.
-----------------------------------------------------------------------
Summary of changes:
source3/lib/util_sock.c | 88 ++++++++++++++++++++++++++++++----------------
1 files changed, 57 insertions(+), 31 deletions(-)
Changeset truncated at 500 lines:
diff --git a/source3/lib/util_sock.c b/source3/lib/util_sock.c
index 7a573ad..1441560 100644
--- a/source3/lib/util_sock.c
+++ b/source3/lib/util_sock.c
@@ -1839,13 +1839,46 @@ const char *get_mydnsfullname(void)
}
/************************************************************
+ Is this my ip address ?
+************************************************************/
+
+static bool is_my_ipaddr(const char *ipaddr_str)
+{
+ struct sockaddr_storage ss;
+ struct iface_struct *nics;
+ int i, n;
+
+ if (!interpret_string_addr(&ss, ipaddr_str, AI_NUMERICHOST)) {
+ return false;
+ }
+
+ if (ismyaddr((struct sockaddr *)&ss)) {
+ return true;
+ }
+
+ if (is_zero_addr((struct sockaddr *)&ss) ||
+ is_loopback_addr((struct sockaddr *)&ss)) {
+ return false;
+ }
+
+ n = get_interfaces(talloc_tos(), &nics);
+ for (i=0; i<n; i++) {
+ if (sockaddr_equal((struct sockaddr *)&nics[i].ip, (struct sockaddr *)&ss)) {
+ TALLOC_FREE(nics);
+ return true;
+ }
+ }
+ TALLOC_FREE(nics);
+ return false;
+}
+
+/************************************************************
Is this my name ?
************************************************************/
bool is_myname_or_ipaddr(const char *s)
{
TALLOC_CTX *ctx = talloc_tos();
- char addr[INET6_ADDRSTRLEN];
char *name = NULL;
const char *dnsname;
char *servername = NULL;
@@ -1893,45 +1926,38 @@ bool is_myname_or_ipaddr(const char *s)
return true;
}
- /* Handle possible CNAME records - convert to an IP addr. */
+ /* Handle possible CNAME records - convert to an IP addr. list. */
if (!is_ipaddress(servername)) {
- /* Use DNS to resolve the name, but only the first address */
- struct sockaddr_storage ss;
- if (interpret_string_addr(&ss, servername, 0)) {
- print_sockaddr(addr,
- sizeof(addr),
- &ss);
- servername = addr;
- }
- }
+ /* Use DNS to resolve the name, check all addresses. */
+ struct addrinfo *p = NULL;
+ struct addrinfo *res = NULL;
- /* Maybe its an IP address? */
- if (is_ipaddress(servername)) {
- struct sockaddr_storage ss;
- struct iface_struct *nics;
- int i, n;
-
- if (!interpret_string_addr(&ss, servername, AI_NUMERICHOST)) {
+ if (!interpret_string_addr_internal(&res,
+ servername,
+ AI_ADDRCONFIG)) {
return false;
}
- if (ismyaddr((struct sockaddr *)&ss)) {
- return true;
- }
-
- if (is_zero_addr((struct sockaddr *)&ss) ||
- is_loopback_addr((struct sockaddr *)&ss)) {
- return false;
- }
+ for (p = res; p; p = p->ai_next) {
+ char addr[INET6_ADDRSTRLEN];
+ struct sockaddr_storage ss;
- n = get_interfaces(talloc_tos(), &nics);
- for (i=0; i<n; i++) {
- if (sockaddr_equal((struct sockaddr *)&nics[i].ip, (struct sockaddr *)&ss)) {
- TALLOC_FREE(nics);
+ ZERO_STRUCT(ss);
+ memcpy(&ss, p->ai_addr, p->ai_addrlen);
+ print_sockaddr(addr,
+ sizeof(addr),
+ &ss);
+ if (is_my_ipaddr(addr)) {
+ freeaddrinfo(res);
return true;
}
}
- TALLOC_FREE(nics);
+ freeaddrinfo(res);
+ }
+
+ /* Maybe its an IP address? */
+ if (is_ipaddress(servername)) {
+ return is_my_ipaddr(servername);
}
/* No match */
--
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