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                 it->line = it;
  20                 ndbsetmalloctag(it, getcallerpc(&db));
  21                 return it;
  22         }
  23
  24         /* look it up */
  25         p = ndbgetvalue(db, &s, attr, val, "ip", &it);
  26         if(p == nil)
  27                 return nil;
  28         free(p);
  29         first = last = nil;
  30         do {
  31                 /* remove the non-ip entries */
  32                 for(; it != nil; it = next){
  33                         next = it->entry;
  34                         if(strcmp(it->attr, "ip") == 0){
  35                                 if(first == nil)
  36                                         first = it;
  37                                 else {
  38                                         last->entry = it;
  39                                         last->line = it;
  40                                 }
  41                                 it->entry = nil;
  42                                 it->line = first;
  43                                 last = it;
  44                         } else {
  45                                 it->entry = nil;
  46                                 ndbfree(it);
  47                         }
  48                 }
  49         } while((it = ndbsnext(&s, attr, val)) != nil);
  50
  51         first = ndbdedup(first);
  52
  53         ndbsetmalloctag(first, getcallerpc(&db));
  54         return first;
  55 }