static void
recursesubnet(Ndb *db, uchar *addr, uchar *mask, char *attr, char *name, char *name1)
{
Ndbs s;
Ndbtuple *t, *nt;
uchar submask[IPaddrlen], net[IPaddrlen];
char ip[Ndbvlen];
int found;
maskip(addr, mask, net);
sprint(ip, "%I", net);
t = ndbsearch(db, &s, "ip", ip);
if(t == 0)
return;
for(nt = t; nt; nt = nt->entry){
if(strcmp(nt->attr, "ipmask") == 0){
parseip(submask, nt->val);
if(memcmp(submask, mask, IPaddrlen) != 0)
recursesubnet(db, addr, submask, attr, name, name1);
break;
}
}
if(name[0] == 0){
found = 0;
for(nt = t; nt; nt = nt->entry){
if(strcmp(nt->attr, attr) == 0){
if(found){
strcpy(name, nt->val);
name1[0] = 0;
found = 1;
} else {
strcpy(name1, nt->val);
break;
}
}
}
}
ndbfree(t);
}
/*
* return the ip addresses for a type of server for system ip
*/
int
lookupserver(char *attr, uchar ipaddrs[2][IPaddrlen], Ipinfo *iip)
{
Ndbtuple *t, *nt;
Ndbs s;
char ip[32];
char name[Ndbvlen];
char name1[Ndbvlen];
int i;
name[0] = name1[0] = 0;
snprint(ip, sizeof(ip), "%I", iip->ipaddr);
t = ndbsearch(db, &s, "ip", ip);
while(t){
for(nt = t; nt; nt = nt->entry){
if(strcmp(attr, nt->attr) == 0){
if(*name == 0)
strcpy(name, nt->val);
else {
strcpy(name1, nt->val);
break;
}
}
}
if(name[0])
break;
t = ndbsnext(&s, "ip", ip);
}
if(name[0] == 0)
recursesubnet(db, iip->ipaddr, classmask[CLASS(iip->ipaddr)], attr, name, name1);
i = 0;
if(name[0] && getipaddr(db, name, *ipaddrs, iip) == 1){
ipaddrs++;
i++;
}
if(name1[0] && getipaddr(db, name1, *ipaddrs, iip) == 1)
i++;
return i;
}
/*
* lookup a subnet and fill in anything we can
*/
static void
recursesubnet(Ndb *db, uint8_t *mask, Ipinfo *iip, char *fs, char *gw,
char *au)
{
Ndbs s;
Ndbtuple *t;
uint8_t submask[IPaddrlen];
char ip[Ndbvlen];
memmove(iip->ipmask, mask, 4);
maskip(iip->ipaddr, iip->ipmask, iip->ipnet);
sprint(ip, "%I", iip->ipnet);
t = ndbsearch(db, &s, "ip", ip);
print("%s->", ip);
if(t){
/* look for a further subnet */
if(lookval(t, s.t, "ipmask", ip)){
parseip(submask, ip);
/* recurse only if it has changed */
if(!equivip(submask, mask))
recursesubnet(db, submask, iip, fs, gw, au);
}
/* fill in what we don't have */
if(gw[0] == 0)
lookval(t, s.t, "ipgw", gw);
if(fs[0] == 0)
lookval(t, s.t, "fs", fs);
if(au[0] == 0)
lookval(t, s.t, "auth", au);
ndbfree(t);
}
}
/*
* find out everything we can about a system from what has been
* specified.
*/
int
ipinfo(Ndb *db, char *etherin, char *ipin, char *name, Ipinfo *iip)
{
Ndbtuple *t;
Ndbs s;
char ether[Ndbvlen];
char ip[Ndbvlen];
char fsname[Ndbvlen];
char gwname[Ndbvlen];
char auname[Ndbvlen];
memset(iip, 0, sizeof(Ipinfo));
fsname[0] = 0;
gwname[0] = 0;
auname[0] = 0;
/*
* look for a matching entry
*/
t = 0;
if(etherin)
t = ndbgetval(db, &s, "ether", etherin, "ip", ip);
if(t == 0 && ipin)
t = ndbsearch(db, &s, "ip", ipin);
if(t == 0 && name)
t = ndbgetval(db, &s, ipattr(name), name, "ip", ip);
if(t){
/*
* copy in addresses and name
*/
if(lookval(t, s.t, "ip", ip))
parseip(iip->ipaddr, ip);
if(lookval(t, s.t, "ether", ether))
parseether(iip->etheraddr, ether);
lookval(t, s.t, "dom", iip->domain);
/*
* Look for bootfile, fs, and gateway.
* If necessary, search through all entries for
* this ip address.
*/
while(t){
if(iip->bootf[0] == 0)
lookval(t, s.t, "bootf", iip->bootf);
if(fsname[0] == 0)
lookval(t, s.t, "fs", fsname);
if(gwname[0] == 0)
lookval(t, s.t, "ipgw", gwname);
if(auname[0] == 0)
lookval(t, s.t, "auth", auname);
ndbfree(t);
if(iip->bootf[0] && fsname[0] && gwname[0] && auname[0])
break;
t = ndbsnext(&s, "ether", ether);
}
} else if(ipin) {
/*
* copy in addresses (all we know)
*/
parseip(iip->ipaddr, ipin);
if(etherin)
parseether(iip->etheraddr, etherin);
} else
return -1;
/*
* Look up the client's network and find a subnet mask for it.
* Fill in from the subnet (or net) entry anything we can't figure
* out from the client record.
*/
recursesubnet(db, classmask[CLASS(iip->ipaddr)], iip, fsname, gwname, auname);
/* lookup fs's and gw's ip addresses */
if(fsname[0])
lookupip(db, fsname, iip->fsip, iip);
if(gwname[0])
lookupip(db, gwname, iip->gwip, iip);
if(auname[0])
lookupip(db, auname, iip->auip, iip);
return 0;
}
