cpython/Modules/nismodule.c

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/***********************************************************
Written by:
Fred Gansevles <Fred.Gansevles@cs.utwente.nl>
Vakgroep Spa,
Faculteit der Informatica,
Universiteit Twente,
Enschede,
the Netherlands.
******************************************************************/
/* NIS module implementation */
#include "allobjects.h"
#include "modsupport.h"
#include "ceval.h"
#include <rpcsvc/ypclnt.h>
#include <sys/time.h>
#include <sys/types.h>
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
static object *NisError;
static object *
nis_error (err)
int err;
{
err_setstr(NisError, yperr_string(err));
return NULL;
}
static struct nis_map {
char *alias;
char *map;
} aliases [] = {
{"passwd", "passwd.byname"},
{"group", "group.byname"},
{"networks", "networks.byaddr"},
{"hosts", "hosts.byname"},
{"protocols", "protocols.bynumber"},
{"services", "services.byname"},
{"aliases", "mail.aliases"},
{"ethers", "ethers.byname"},
{0L, 0L}
};
static char *
nis_mapname (map)
char *map;
{
int i;
for (i=0; aliases[i].alias != 0L; i++)
if (!strcmp (aliases[i].alias, map))
map = aliases[i].map;
return map;
}
static int
nis_foreach (instatus, inkey, inkeylen, inval, invallen, indata)
int instatus;
char *inkey;
int inkeylen;
char *inval;
int invallen;
object *indata;
{
if (instatus == YP_TRUE) {
object *key = newsizedstringobject(inkey, inkeylen);
object *val = newsizedstringobject(inval, invallen);
int err;
if (key == NULL || val == NULL) {
/* XXX error -- don't know how to handle */
err_clear();
XDECREF(key);
XDECREF(val);
return 1;
}
err = mappinginsert(indata, key, val);
DECREF(key);
DECREF(val);
if (err != 0) {
err_clear();
return 1;
}
return 0;
}
return 1;
}
static object *
nis_match (self, args)
object *self;
object *args;
{
char *match;
char *domain;
int keylen, len;
char *key, *map;
int err;
object *res;
if (!getargs(args, "(s#s)", &key, &keylen, &map))
return NULL;
if ((err = yp_get_default_domain(&domain)) != 0)
return nis_error(err);
BGN_SAVE
map = nis_mapname (map);
err = yp_match (domain, map, key, keylen, &match, &len);
END_SAVE
if (err != 0)
return nis_error(err);
res = newsizedstringobject (match, len);
free (match);
return res;
}
static object *
nis_cat (self, args)
object *self;
object *args;
{
char *domain;
char *map;
struct ypall_callback cb;
object *cat;
int err;
if (!getstrarg(args, &map))
return NULL;
if ((err = yp_get_default_domain(&domain)) != 0)
return nis_error(err);
cat = newdictobject ();
if (cat == NULL)
return NULL;
cb.foreach = nis_foreach;
cb.data = (char *)cat;
BGN_SAVE
map = nis_mapname (map);
err = yp_all (domain, map, &cb);
END_SAVE
if (err != 0) {
DECREF(cat);
return nis_error(err);
}
return cat;
}
#define YPPROC_MAPLIST ((u_long)11)
#define YPPROG ((u_long)100004)
#define YPVERS ((u_long)2)
typedef char *domainname;
typedef char *mapname;
enum nisstat {
NIS_TRUE = 1,
NIS_NOMORE = 2,
NIS_FALSE = 0,
NIS_NOMAP = -1,
NIS_NODOM = -2,
NIS_NOKEY = -3,
NIS_BADOP = -4,
NIS_BADDB = -5,
NIS_YPERR = -6,
NIS_BADARGS = -7,
NIS_VERS = -8
};
typedef enum nisstat nisstat;
struct nismaplist {
mapname map;
struct nismaplist *next;
};
typedef struct nismaplist nismaplist;
struct nisresp_maplist {
nisstat stat;
nismaplist *maps;
};
typedef struct nisresp_maplist nisresp_maplist;
static struct timeval TIMEOUT = { 25, 0 };
static
bool_t
nis_xdr_domainname(xdrs, objp)
XDR *xdrs;
domainname *objp;
{
if (!xdr_string(xdrs, objp, YPMAXDOMAIN)) {
return (FALSE);
}
return (TRUE);
}
static
bool_t
nis_xdr_mapname(xdrs, objp)
XDR *xdrs;
mapname *objp;
{
if (!xdr_string(xdrs, objp, YPMAXMAP)) {
return (FALSE);
}
return (TRUE);
}
static
bool_t
nis_xdr_ypmaplist(xdrs, objp)
XDR *xdrs;
nismaplist *objp;
{
if (!nis_xdr_mapname(xdrs, &objp->map)) {
return (FALSE);
}
if (!xdr_pointer(xdrs, (char **)&objp->next, sizeof(nismaplist), nis_xdr_ypmaplist)) {
return (FALSE);
}
return (TRUE);
}
static
bool_t
nis_xdr_ypstat(xdrs, objp)
XDR *xdrs;
nisstat *objp;
{
if (!xdr_enum(xdrs, (enum_t *)objp)) {
return (FALSE);
}
return (TRUE);
}
static
bool_t
nis_xdr_ypresp_maplist(xdrs, objp)
XDR *xdrs;
nisresp_maplist *objp;
{
if (!nis_xdr_ypstat(xdrs, &objp->stat)) {
return (FALSE);
}
if (!xdr_pointer(xdrs, (char **)&objp->maps, sizeof(nismaplist), nis_xdr_ypmaplist)) {
return (FALSE);
}
return (TRUE);
}
static
nisresp_maplist *
nisproc_maplist_2(argp, clnt)
domainname *argp;
CLIENT *clnt;
{
static nisresp_maplist res;
memset(&res, 0, sizeof(res));
if (clnt_call(clnt, YPPROC_MAPLIST, nis_xdr_domainname, argp, nis_xdr_ypresp_maplist
, &res, TIMEOUT) != RPC_SUCCESS) {
return (NULL);
}
return (&res);
}
static
nismaplist *
nis_maplist ()
{
nisresp_maplist *list;
char *dom;
CLIENT *cl, *clnt_create();
char *server;
yp_get_default_domain (&dom);
yp_master (dom, aliases[0].map, &server);
cl = clnt_create(server, YPPROG, YPVERS, "tcp");
if (cl == NULL) {
clnt_pcreateerror(server);
return NULL;
}
list = nisproc_maplist_2 (&dom, cl);
if (list == NULL)
return NULL;
if (list->stat != NIS_TRUE)
return NULL;
return list->maps;
}
static object *
nis_maps (self, args)
object *self;
object *args;
{
nismaplist *maps;
object *list;
if ((maps = nis_maplist ()) == NULL)
return NULL;
if ((list = newlistobject(0)) == NULL)
return NULL;
for (maps = maps->next; maps; maps = maps->next) {
if (addlistitem (list, newstringobject (maps->map)) < 0) {
DECREF(list);
list = NULL;
break;
}
}
/* XXX Shouldn't we free the list of maps now? */
return list;
}
static struct methodlist nis_methods[] = {
{"match", nis_match},
{"cat", nis_cat},
{"maps", nis_maps},
{NULL, NULL} /* Sentinel */
};
void
initnis ()
{
object *m, *d;
m = initmodule("nis", nis_methods);
d = getmoduledict(m);
NisError = newstringobject("nis.error");
if (NisError == NULL || dictinsert(d, "error", NisError) != 0)
fatal("Cannot define nis.error");
}