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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <ndb.h>
#include <ndbhf.h>
/*
* look up the ip attributes 'list' for an entry that has the
* given 'attr=val' and a 'ip=' tuples.
*
* return nil if not found.
*/
Ndbtuple*
csipinfo(char *netroot, char *attr, char *val, char **list, int n)
{
Ndbtuple *t, *first, *last;
int i;
char line[1024];
int fd;
char *p, *e;
if(netroot)
snprint(line, sizeof(line), "%s/cs", netroot);
else
strcpy(line, "/net/cs");
fd = open(line, ORDWR);
if(fd < 0)
return 0;
seek(fd, 0, 0);
e = line + sizeof(line);
p = seprint(line, e, "!ipinfo %s=%s", attr, val);
for(i = 0; i < n; i++){
if(*list == nil)
break;
p = seprint(p, e, " %s", *list++);
}
if(write(fd, line, strlen(line)) < 0){
close(fd);
return 0;
}
seek(fd, 0, 0);
first = last = 0;
for(;;){
n = read(fd, line, sizeof(line)-2);
if(n <= 0)
break;
line[n] = '\n';
line[n+1] = 0;
t = _ndbparseline(line);
if(t == 0)
continue;
if(first)
last->entry = t;
else
first = t;
last = t;
while(last->entry)
last = last->entry;
}
close(fd);
setmalloctag(first, getcallerpc(&netroot));
return first;
}
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