ref: e40ce258bfbdb7a27dfcf79e7c72f8861d2ff54d
dir: /libauthsrv/authdial.c/
#include <u.h>
#include <libc.h>
#include <authsrv.h>
#include <bio.h>
#include <ndb.h>
int
authdial(char *netroot, char *dom)
{
Ndbtuple *t, *nt;
char *p;
int rv;
if(dom == nil)
/* look for one relative to my machine */
return dial(netmkaddr("$auth", nil, "ticket"), nil, nil, nil);
/* look up an auth server in an authentication domain */
p = csgetvalue(netroot, "authdom", dom, "auth", &t);
/* if that didn't work, just try the IP domain */
if(p == nil)
p = csgetvalue(netroot, "dom", dom, "auth", &t);
/*
* if that didn't work, try p9auth.$dom. this is very helpful if
* you can't edit /lib/ndb.
*/
if(p == nil) {
p = smprint("p9auth.%s", dom);
t = ndbnew("auth", p);
}
free(p);
/*
* allow multiple auth= attributes for backup auth servers,
* try each one in order.
*/
rv = -1;
for(nt = t; nt != nil; nt = nt->entry) {
if(strcmp(nt->attr, "auth") == 0) {
rv = dial(netmkaddr(nt->val, nil, "ticket"), nil, nil, nil);
if(rv >= 0)
break;
}
}
ndbfree(t);
return rv;
}