DNS lookups first look in the nics table and then the machines table.

[invirt/packages/invirt-dns.git] / invirt-dns

diff --git a/invirt-dns b/invirt-dns
index 13e00d4..4049257 100755 (executable)
--- a/invirt-dns
+++ b/invirt-dns
@@ -12,6 +12,7 @@ import invirt.database
 import psycopg2
 import sqlalchemy
 import time
+import re
 
 class DatabaseAuthority(common.ResolverBase):
     """An Authority that is loaded from a file."""
@@ -91,17 +92,17 @@ class DatabaseAuthority(common.ResolverBase):
                     results.append(dns.RRHeader(domain, dns.SOA, dns.IN,
                                                 ttl, self.soa, auth=True))
             else: # Request for a subdomain.
-                if 'passup' in dir(config.dns) and host in config.dns.passup:
-                    record = dns.Record_CNAME('%s.%s' % (host, config.dns.parent), ttl)
-                    return defer.succeed((
-                        [dns.RRHeader(name, dns.CNAME, dns.IN, ttl, record, auth=True)],
-                        [], []))
-
-                value = invirt.database.Machine.query().filter_by(name=host).first()
-                if value is None or not value.nics:
-                    return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
-                ip = value.nics[0].ip
-                if ip is None:  #Deactivated?
+                value = invirt.database.NIC.query.filter_by(hostname=host).first()
+                if value:
+                    ip = value.ip
+                else:
+                    value = invirt.database.Machine.query().filter_by(name=host).first()
+                    if value:
+                        ip = value.nics[0].ip
+                    else:
+                        return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
+                
+                if ip is None:
                     return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
 
                 if type in (dns.A, dns.ALL_RECORDS):
@@ -119,11 +120,58 @@ class DatabaseAuthority(common.ResolverBase):
             #Doesn't exist
             return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
 
+class QuotingBindAuthority(authority.BindAuthority):
+    """
+    A BindAuthority that (almost) deals with quoting correctly
+    
+    This will catch double quotes as marking the start or end of a
+    quoted phrase, unless the double quote is escaped by a backslash
+    """
+    # Match either a quoted or unquoted string literal followed by
+    # whitespace or the end of line.  This yields two groups, one of
+    # which has a match, and the other of which is None, depending on
+    # whether the string literal was quoted or unquoted; this is what
+    # necessitates the subsequent filtering out of groups that are
+    # None.
+    string_pat = \
+            re.compile(r'"((?:[^"\\]|\\.)*)"|((?:[^\\\s]|\\.)+)(?:\s+|\s*$)')
+
+    # For interpreting escapes.
+    escape_pat = re.compile(r'\\(.)')
+
+    def collapseContinuations(self, lines):
+        L = []
+        state = 0
+        for line in lines:
+            if state == 0:
+                if line.find('(') == -1:
+                    L.append(line)
+                else:
+                    L.append(line[:line.find('(')])
+                    state = 1
+            else:
+                if line.find(')') != -1:
+                    L[-1] += ' ' + line[:line.find(')')]
+                    state = 0
+                else:
+                    L[-1] += ' ' + line
+        lines = L
+        L = []
+
+        for line in lines:
+            in_quote = False
+            split_line = []
+            for m in self.string_pat.finditer(line):
+                [x] = [x for x in m.groups() if x is not None]
+                split_line.append(self.escape_pat.sub(r'\1', x))
+            L.append(split_line)
+        return filter(None, L)
+
 if '__main__' == __name__:
     resolvers = []
     for zone in config.dns.zone_files:
         for origin in config.dns.domains:
-            r = authority.BindAuthority(zone)
+            r = QuotingBindAuthority(zone)
             # This sucks, but if I want a generic zone file, I have to
             # reload the information by hand
             r.origin = origin