[10] "domain name not in zone",
};
-char *dnsrch[] = {
- "dnsdomain",
- "dom",
+static uchar loopbacknet[IPaddrlen] = {
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0xff, 0xff,
+ 127, 0, 0, 0
+};
+static uchar loopbackmask[IPaddrlen] = {
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0, 0, 0
+};
+static uchar loopback6[IPaddrlen] = {
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 1
};
void
void
main(int argc, char *argv[])
{
+ static char *query[] = { "dom", "dnsdomain", "ns", "inform" };
+ char *sysname, *dnsdomain, *dom, *inform, *ns, net[32];
int debug, len, fd;
uint err;
- char *sysname, *dnsdomain, *dom, *ns, net[32];
- uchar *p, buf[4096], addr[IPv4addrlen], v6addr[IPaddrlen];
+ uchar *p, buf[4096], mynet[IPaddrlen];
ushort txid;
Ndb *db;
Ndbtuple *t, *tt;
- static char *query[] = { "dom", "dnsdomain", "ns", };
+ Ipifc *ifc;
+ Iplifc *lifc;
fmtinstall('I', eipfmt);
fmtinstall('V', eipfmt);
debug = 0;
ns = nil;
dom = nil;
+ inform = nil;
dnsdomain = nil;
ARGBEGIN{
case 'd':
if((db = ndbopen(nil)) == nil)
sysfatal("can't open ndb: %r");
tt = ndbipinfo(db, "sys", sysname, query, nelem(query));
- for(t = tt; t; t = t->entry)
+ for(t = tt; t; t = t->entry){
if(strcmp(t->attr, "ns") == 0)
ns = t->val;
else if(strcmp(t->attr, "dom") == 0)
dom = t->val;
else if(strcmp(t->attr, "dnsdomain") == 0)
dnsdomain = t->val;
+ else if(strcmp(t->attr, "inform") == 0)
+ inform = t->val;
+ }
+
ndbfree(tt);
ndbclose(db);
+ if(inform)
+ dom = inform;
if(!ns)
sysfatal("no relevant ns=");
if(!dom)
if(!dnsdomain)
sysfatal("no relevant dnsdomain=");
- myipaddr(v6addr, net);
- memmove(addr, v6addr + IPaddrlen - IPv4addrlen, IPv4addrlen);
-
if(debug){
- print("ip=%V\n", addr);
print("ns=%s\n", ns);
print("dnsdomain=%s\n", dnsdomain);
print("dom=%s\n", dom);
p16(&p, Cin); /* zone class */
/* delete old name */
- pname(&p, dom); /* name */
+ pname(&p, dom); /* name */
p16(&p, Ta); /* type: v4 addr */
p16(&p, Call); /* class */
p32(&p, 0); /* TTL */
p16(&p, 0); /* data len */
- /* add new A record */
- pname(&p, dom); /* name */
- p16(&p, Ta); /* type: v4 addr */
- p16(&p, Cin); /* class */
- p32(&p, 60*60*25); /* TTL (25 hours) */
- p16(&p, IPv4addrlen); /* data len */
- pmem(&p, addr, IPv4addrlen); /* v4 address */
+ pname(&p, dom); /* name */
+ p16(&p, Taaaa); /* type: v6 addr */
+ p16(&p, Call); /* class */
+ p32(&p, 0); /* TTL */
+ p16(&p, 0); /* data len */
+
+ for(ifc = readipifc(net, nil, -1); ifc != nil; ifc = ifc->next){
+ for(lifc = ifc->lifc; lifc != nil; lifc = lifc->next){
+ /* unspecified */
+ if(ipcmp(lifc->ip, IPnoaddr) == 0)
+ continue;
+
+ /* ipv6 loopback */
+ if(ipcmp(lifc->ip, loopback6) == 0)
+ continue;
+
+ /* ipv4 loopback */
+ maskip(lifc->ip, loopbackmask, mynet);
+ if(ipcmp(mynet, loopbacknet) == 0)
+ continue;
+
+ if(debug)
+ print("ip=%I\n", lifc->ip);
+
+ /* add new A record */
+ pname(&p, dom); /* name */
+ p16(&p, isv4(lifc->ip)?Ta:Taaaa);
+ p16(&p, Cin); /* class */
+ p32(&p, 60*60*25); /* TTL (25 hours) */
+ if(isv4(lifc->ip)){
+ p16(&p, IPv4addrlen);
+ pmem(&p, lifc->ip+IPv4off, IPv4addrlen);
+ } else {
+ p16(&p, IPaddrlen);
+ pmem(&p, lifc->ip, IPaddrlen);
+ }
+ }
+ }
len = p - buf;
if(write(fd, buf, len) != len)
}while(g16(&p) != txid);
alarm(0);
- close(fd);
-
err = g16(&p) & 7;
if(err != 0 && err != 7) /* err==7 is just a "yes, I know" warning */
if(err < nelem(errmsgs))
sysfatal("%s", errmsgs[err]);
else
sysfatal("unknown dns server error %d", err);
- exits(0);
+ exits(nil);
}