Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <ip.h>
#include <bio.h>
#include <ndb.h>

static uchar noether[6];

/*
 *  Look for a pair with the given attribute.  look first on the same line,
 *  then in the whole entry.
 */
static Ndbtuple*
lookval(Ndbtuple *entry, Ndbtuple *line, char *attr, char *to)
{
        Ndbtuple *nt;

        /* first look on same line (closer binding) */
        for(nt = line;;){
                if(strcmp(attr, nt->attr) == 0){
                        strncpy(to, nt->val, Ndbvlen);
                        return nt;
                }
                nt = nt->line;
                if(nt == line)
                        break;
        }
        /* search whole tuple */
        for(nt = entry; nt; nt = nt->entry)
                if(strcmp(attr, nt->attr) == 0){
                        strncpy(to, nt->val, Ndbvlen);
                        return nt;
                }
        return 0;
}

/*
 *  lookup an ip address
 */
static uchar*
lookupip(Ndb *db, char *name, uchar *to, Ipinfo *iip)
{
        Ndbtuple *t, *nt;
        char buf[Ndbvlen];
        uchar subnet[IPaddrlen];
        Ndbs s;
        char *attr;

        attr = ipattr(name);
        if(strcmp(attr, "ip") == 0){
                parseip(to, name);
                return to;
        }

        t = ndbgetval(db, &s, attr, name, "ip", buf);
        if(t){
                /* first look for match on same subnet */
                for(nt = t; nt; nt = nt->entry){
                        if(strcmp(nt->attr, "ip") != 0)
                                continue;
                        parseip(to, nt->val);
                        maskip(to, iip->ipmask, subnet);
                        if(memcmp(subnet, iip->ipnet, sizeof(subnet)) == 0)
                                return to;
                }

                /* otherwise, just take what we have */
                ndbfree(t);
                parseip(to, buf);
                return to;
        }
        return 0;
}

/*
 *  lookup a subnet and fill in anything we can
 */
static void
recursesubnet(Ndb *db, uchar *mask, Ipinfo *iip, char *fs, char *gw, char *au)
{
        Ndbs s;
        Ndbtuple *t;
        uchar 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);
        }
}
#ifdef foo
/*
 *  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;
}
#endif
void
main(int argc, char **argv)
{
        Ipinfo ii;
        Ndb *db;

        db = ndbopen(0);

        fmtinstall('E', eipconv);
        fmtinstall('I', eipconv);
        if(argc < 2)
                exits(0);
        if(strchr(argv[1], '.')){
                if(ipinfo(db, 0, argv[1], 0, &ii) < 0)
                        exits(0);
        } else {
                if(ipinfo(db, argv[1], 0, 0, &ii) < 0)
                        exits(0);
        }
        fprint(2, "a %I m %I n %I f %s e %E\n", ii.ipaddr,
                ii.ipmask, ii.ipnet, ii.bootf, ii.etheraddr);
}