tndbgetipaddr.c - plan9port - [fork] Plan 9 from user space
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       ---
       tndbgetipaddr.c (792B)
       ---
            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                 return it;
           20         }
           21 
           22         /* look it up */
           23         p = ndbgetvalue(db, &s, attr, val, "ip", &it);
           24         if(p == nil)
           25                 return nil;
           26         free(p);
           27 
           28         /* remove the non-ip entries */
           29         first = last = nil;
           30         for(; it; it = next){
           31                 next = it->entry;
           32                 if(strcmp(it->attr, "ip") == 0){
           33                         if(first == nil)
           34                                 first = it;
           35                         else
           36                                 last->entry = it;
           37                         it->entry = nil;
           38                         it->line = first;
           39                         last = it;
           40                 } else {
           41                         it->entry = nil;
           42                         ndbfree(it);
           43                 }
           44         }
           45 
           46         return first;
           47 }