sys/src/libndb/ndbgetipaddr.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <bio.h>
   4 #include <ndb.h>
   5 #include <ip.h>
   6
   7 /* return list of ip addresses for a name */
   8 Ndbtuple*
   9 ndbgetipaddr(Ndb *db, char *val)
  10 {
  11         char *attr, *p;
  12         Ndbtuple *it, *first, *last, *next;
  13         Ndbs s;
  14
  15         /* already an IP address? */
  16         attr = ipattr(val);
  17         if(strcmp(attr, "ip") == 0){
  18                 it = ndbnew("ip", val);
  19                 ndbsetmalloctag(it, getcallerpc(&db));
  20                 return it;
  21         }
  22
  23         /* look it up */
  24         p = ndbgetvalue(db, &s, attr, val, "ip", &it);
  25         if(p == nil)
  26                 return nil;
  27         free(p);
  28
  29         /* remove the non-ip entries */
  30         first = last = nil;
  31         for(; it; it = next){
  32                 next = it->entry;
  33                 if(strcmp(it->attr, "ip") == 0){
  34                         if(first == nil)
  35                                 first = it;
  36                         else
  37                                 last->entry = it;
  38                         it->entry = nil;
  39                         it->line = first;
  40                         last = it;
  41                 } else {
  42                         it->entry = nil;
  43                         ndbfree(it);
  44                 }
  45         }
  46
  47         ndbsetmalloctag(first, getcallerpc(&db));
  48         return first;
  49 }