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Use dns_lookup

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@932 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
1996-11-04 20:30:06 +00:00
parent 810d6ff85c
commit dc4a8b72ef
1 changed files with 24 additions and 55 deletions
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79
lib/kafs/afssys.c
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@@ -73,6 +73,8 @@ RCSID("$Id$");
#include <krb.h>
#include <kafs.h>
#include <resolve.h>
#include "afssysdefs.h"
#define AUTH_SUPERUSER "afs"
@@ -117,75 +119,42 @@ get_cred(char *princ, char *inst, char *krealm, CREDENTIALS *c, KTEXT_ST *tkt)
static u_int32_t ip_aton(char *ip)
{
u_int32_t addr;
int a, b, c, d;
if(sscanf(ip, "%d.%d.%d.%d", &a, &b, &c, &d) != 4)
return 0;
if(a < 0 || a > 255 ||
b < 0 || b > 255 ||
c < 0 || c > 255 ||
d < 0 || d > 255)
return 0;
unsigned int a, b, c, d;
if(sscanf(ip, "%u.%u.%u.%u", &a, &b, &c, &d) != 4)
return 0;
if((a | b | c | d) > 255)
return 0;
addr = (a << 24) | (b << 16) | (c << 8) | d;
addr = htonl(addr);
return addr;
}
/* Try to get a db-server for an AFS cell from a AFSDB record */
static int
dns_find_cell(char *cell, char *dbserver)
{
#if defined(HAVE_DN_EXPAND) && defined(HAVE_RES_SEARCH)
#ifndef T_AFSDB
#define T_AFSDB 18
#endif
unsigned char data[1024];
unsigned char host[MaxHostNameLen];
int len;
int status;
unsigned char *p;
len = res_search(cell, C_IN, T_AFSDB, data, sizeof(data));
if(len < 0)
return -1;
p = data + sizeof(HEADER);
status = dn_expand(data, data + len, p, host, sizeof(host));
if(status < 0)
return -1;
p += status;
p += 4; /* type and class */
while(p < data + len){
int type, subtype, class, ttl, size;
status = dn_expand(data, data + len, p, host, sizeof(host));
if(status < 0)
return -1;
p += status;
type = (p[0] << 8) | p[1];
p += 2;
class = (p[0] << 8) | p[1];
p += 2;
ttl = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
p += 4;
size = (p[0] << 8) | p[1];
p += 2;
if(type == T_AFSDB){
subtype = (p[0] << 8) | p[1];
if(subtype == 1){
p += 2;
status = dn_expand(data, data + len, p, host, sizeof(host));
if(status < 0)
return -1;
strncpy(dbserver, (char*)host, MaxHostNameLen);
dbserver[MaxHostNameLen] = 0;
return 0;
struct dns_reply *r;
int ok = -1;
r = dns_lookup(cell, "afsdb");
if(r){
struct resource_record *rr = r->head;
struct mx_record *afsdb; /* afsdb and mx are identical */
while(rr){
if(rr->type == T_AFSDB && rr->u.afsdb->preference == 1){
strncpy(dbserver, rr->u.afsdb->domain, MaxHostNameLen);
dbserver[MaxHostNameLen - 1] = 0;
ok = 0;
break;
}
rr = rr->next;
}
p += size;
dns_free_data(r);
}
#endif
return -1;
return ok;
}
/* Find the realm associated with cell. Do this by opening
/usr/vice/etc/CellServDB and getting the realm-of-host for the
first VL-server for the cell.