int
main(int argc, char *argv[])
{
int ch;
int ypxfr_force = 0;
char *ypxfr_dest_domain = NULL;
char *ypxfr_source_host = NULL;
char *ypxfr_source_domain = NULL;
char *ypxfr_local_domain = NULL;
char *ypxfr_master = NULL;
unsigned long ypxfr_order = -1, ypxfr_skew_check = -1;
char *ypxfr_mapname = NULL;
int ypxfr_args = 0;
char ypxfr_temp_map[MAXPATHLEN + 2];
char tempmap[MAXPATHLEN + 2];
char buf[MAXPATHLEN + 2];
DBT key, data;
int remoteport;
int interdom = 0;
int secure = 0;
debug = 1;
if (!isatty(fileno(stderr))) {
openlog("ypxfr", LOG_PID, LOG_DAEMON);
_rpcpmstart = 1;
}
if (argc < 2)
usage();
while ((ch = getopt(argc, argv, "fcd:h:s:p:C:")) != -1) {
int my_optind;
switch (ch) {
case 'f':
ypxfr_force++;
ypxfr_args++;
break;
case 'c':
ypxfr_clear = 0;
ypxfr_args++;
break;
case 'd':
ypxfr_dest_domain = optarg;
ypxfr_args += 2;
break;
case 'h':
ypxfr_source_host = optarg;
ypxfr_args += 2;
break;
case 's':
ypxfr_source_domain = optarg;
ypxfr_args += 2;
break;
case 'p':
yp_dir = optarg;
ypxfr_args += 2;
break;
case 'C':
/*
* Whoever decided that the -C flag should take
* four arguments is a twit.
*/
my_optind = optind - 1;
if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
yp_error("transaction ID not specified");
usage();
}
ypxfr_resp.transid = atol(argv[my_optind]);
my_optind++;
if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
yp_error("RPC program number not specified");
usage();
}
ypxfr_prognum = atol(argv[my_optind]);
my_optind++;
if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
yp_error("address not specified");
usage();
}
if (!inet_aton(argv[my_optind], &ypxfr_callback_addr.sin_addr)) {
yp_error("failed to convert '%s' to IP addr",
argv[my_optind]);
exit(1);
}
my_optind++;
if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
yp_error("port not specified");
usage();
}
ypxfr_callback_addr.sin_port = htons((u_short)atoi(argv[my_optind]));
ypxfr_args += 5;
break;
default:
usage();
break;
}
}
ypxfr_mapname = argv[ypxfr_args + 1];
if (ypxfr_mapname == NULL) {
yp_error("no map name specified");
usage();
}
/* Always the case. */
ypxfr_callback_addr.sin_family = AF_INET;
/* Determine if local NIS client facilities are turned on. */
if (!yp_get_default_domain(&ypxfr_local_domain) &&
_yp_check(&ypxfr_local_domain))
ypxfr_use_yplib = 1;
/*
* If no destination domain is specified, assume that the
* local default domain is to be used and try to obtain it.
* Fails if NIS client facilities are turned off.
*/
if (ypxfr_dest_domain == NULL) {
if (ypxfr_use_yplib) {
yp_get_default_domain(&ypxfr_dest_domain);
} else {
yp_error("no destination domain specified and \
the local domain name isn't set");
ypxfr_exit(YPXFR_BADARGS,NULL);
}
}
/*
* If a source domain is not specified, assume it to
* be the same as the destination domain.
*/
if (ypxfr_source_domain == NULL) {
ypxfr_source_domain = ypxfr_dest_domain;
}
/*
* If the source host is not specified, assume it to be the
* master for the specified map. If local NIS client facilities
* are turned on, we can figure this out using yp_master().
* If not, we have to see if a local copy of the map exists
* and extract its YP_MASTER_NAME record. If _that_ fails,
* we are stuck and must ask the user for more information.
*/
if (ypxfr_source_host == NULL) {
if (!ypxfr_use_yplib) {
/*
* Double whammy: NIS isn't turned on and the user
* didn't specify a source host.
*/
char *dptr;
key.data = "YP_MASTER_NAME";
key.size = sizeof("YP_MASTER_NAME") - 1;
if (yp_get_record(ypxfr_dest_domain, ypxfr_mapname,
&key, &data, 1) != YP_TRUE) {
yp_error("no source host specified");
ypxfr_exit(YPXFR_BADARGS,NULL);
}
dptr = data.data;
dptr[data.size] = '\0';
ypxfr_master = ypxfr_source_host = strdup(dptr);
}
} else {
if (ypxfr_use_yplib)
ypxfr_use_yplib = 0;
}
if (ypxfr_master == NULL) {
if ((ypxfr_master = ypxfr_get_master(ypxfr_source_domain,
ypxfr_mapname,
ypxfr_source_host,
ypxfr_use_yplib)) == NULL) {
yp_error("failed to find master of %s in domain %s: %s",
ypxfr_mapname, ypxfr_source_domain,
ypxfrerr_string((ypxfrstat)yp_errno));
ypxfr_exit(YPXFR_MADDR,NULL);
}
}
/*
* If we got here and ypxfr_source_host is still undefined,
* it means we had to resort to using yp_master() to find the
* master server for the map. The source host and master should
* be identical.
*/
if (ypxfr_source_host == NULL)
ypxfr_source_host = ypxfr_master;
/*
* Don't talk to ypservs on unprivileged ports.
*/
remoteport = getrpcport(ypxfr_source_host, YPPROG, YPVERS, IPPROTO_UDP);
if (remoteport >= IPPORT_RESERVED) {
yp_error("ypserv on %s not running on reserved port",
ypxfr_source_host);
ypxfr_exit(YPXFR_REFUSED, NULL);
}
if ((ypxfr_order = ypxfr_get_order(ypxfr_source_domain,
ypxfr_mapname,
ypxfr_master, 0)) == 0) {
yp_error("failed to get order number of %s: %s",
ypxfr_mapname, yp_errno == YP_TRUE ?
"map has order 0" :
ypxfrerr_string((ypxfrstat)yp_errno));
ypxfr_exit(YPXFR_YPERR,NULL);
}
if (ypxfr_match(ypxfr_master, ypxfr_source_domain, ypxfr_mapname,
"YP_INTERDOMAIN", sizeof("YP_INTERDOMAIN") - 1))
interdom++;
if (ypxfr_match(ypxfr_master, ypxfr_source_domain, ypxfr_mapname,
"YP_SECURE", sizeof("YP_SECURE") - 1))
secure++;
key.data = "YP_LAST_MODIFIED";
key.size = sizeof("YP_LAST_MODIFIED") - 1;
/* The order number is immaterial when the 'force' flag is set. */
if (!ypxfr_force) {
int ignore = 0;
if (yp_get_record(ypxfr_dest_domain,ypxfr_mapname,&key,&data,1) != YP_TRUE) {
switch (yp_errno) {
case YP_NOKEY:
ypxfr_exit(YPXFR_FORCE,NULL);
break;
case YP_NOMAP:
/*
* If the map doesn't exist, we're
* creating it. Ignore the error.
*/
ignore++;
break;
case YP_BADDB:
default:
ypxfr_exit(YPXFR_DBM,NULL);
break;
}
}
if (!ignore && ypxfr_order <= atoi(data.data))
ypxfr_exit(YPXFR_AGE, NULL);
}
/* Construct a temporary map file name */
snprintf(tempmap, sizeof(tempmap), "%s.%d",ypxfr_mapname, getpid());
snprintf(ypxfr_temp_map, sizeof(ypxfr_temp_map), "%s/%s/%s", yp_dir,
ypxfr_dest_domain, tempmap);
if ((remoteport = getrpcport(ypxfr_source_host, YPXFRD_FREEBSD_PROG,
YPXFRD_FREEBSD_VERS, IPPROTO_TCP))) {
/* Don't talk to rpc.ypxfrds on unprovileged ports. */
if (remoteport >= IPPORT_RESERVED) {
yp_error("rpc.ypxfrd on %s not using privileged port",
ypxfr_source_host);
ypxfr_exit(YPXFR_REFUSED, NULL);
}
/* Try to send using ypxfrd. If it fails, use old method. */
if (!ypxfrd_get_map(ypxfr_source_host, ypxfr_mapname,
ypxfr_source_domain, ypxfr_temp_map))
goto leave;
}
/* Open the temporary map read/write. */
if ((dbp = yp_open_db_rw(ypxfr_dest_domain, tempmap, 0)) == NULL) {
yp_error("failed to open temporary map file");
ypxfr_exit(YPXFR_DBM,NULL);
}
/*
* Fill in the keys we already know, such as the order number,
* master name, input file name (we actually make up a bogus
* name for that) and output file name.
*/
snprintf(buf, sizeof(buf), "%lu", ypxfr_order);
data.data = buf;
data.size = strlen(buf);
if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
yp_error("failed to write order number to database");
ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
}
key.data = "YP_MASTER_NAME";
key.size = sizeof("YP_MASTER_NAME") - 1;
data.data = ypxfr_master;
data.size = strlen(ypxfr_master);
if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
yp_error("failed to write master name to database");
ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
}
key.data = "YP_DOMAIN_NAME";
key.size = sizeof("YP_DOMAIN_NAME") - 1;
data.data = ypxfr_dest_domain;
data.size = strlen(ypxfr_dest_domain);
if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
yp_error("failed to write domain name to database");
ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
}
snprintf (buf, sizeof(buf), "%s:%s", ypxfr_source_host, ypxfr_mapname);
key.data = "YP_INPUT_NAME";
key.size = sizeof("YP_INPUT_NAME") - 1;
data.data = &buf;
data.size = strlen(buf);
if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
yp_error("failed to write input name to database");
ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
}
snprintf(buf, sizeof(buf), "%s/%s/%s", yp_dir, ypxfr_dest_domain,
ypxfr_mapname);
key.data = "YP_OUTPUT_NAME";
key.size = sizeof("YP_OUTPUT_NAME") - 1;
data.data = &buf;
data.size = strlen(buf);
if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
yp_error("failed to write output name to database");
ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
}
if (interdom) {
key.data = "YP_INTERDOMAIN";
key.size = sizeof("YP_INTERDOMAIN") - 1;
data.data = "";
data.size = 0;
if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
yp_error("failed to add interdomain flag to database");
ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
}
}
if (secure) {
key.data = "YP_SECURE";
key.size = sizeof("YP_SECURE") - 1;
data.data = "";
data.size = 0;
if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
yp_error("failed to add secure flag to database");
ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
}
}
/* Now suck over the contents of the map from the master. */
if (ypxfr_get_map(ypxfr_mapname,ypxfr_source_domain,
ypxfr_source_host, ypxfr_foreach)){
yp_error("failed to retrieve map from source host");
ypxfr_exit(YPXFR_YPERR,ypxfr_temp_map);
}
(void)(dbp->close)(dbp);
dbp = NULL; /* <- yes, it seems this is necessary. */
leave:
snprintf(buf, sizeof(buf), "%s/%s/%s", yp_dir, ypxfr_dest_domain,
ypxfr_mapname);
/* Peek at the order number again and check for skew. */
if ((ypxfr_skew_check = ypxfr_get_order(ypxfr_source_domain,
ypxfr_mapname,
ypxfr_master, 0)) == 0) {
yp_error("failed to get order number of %s: %s",
ypxfr_mapname, yp_errno == YP_TRUE ?
"map has order 0" :
ypxfrerr_string((ypxfrstat)yp_errno));
ypxfr_exit(YPXFR_YPERR,ypxfr_temp_map);
}
if (ypxfr_order != ypxfr_skew_check)
ypxfr_exit(YPXFR_SKEW,ypxfr_temp_map);
/*
* Send a YPPROC_CLEAR to the local ypserv.
*/
if (ypxfr_clear) {
char in = 0;
char *out = NULL;
int stat;
if ((stat = callrpc("localhost",YPPROG,YPVERS,YPPROC_CLEAR,
(xdrproc_t)xdr_void, (void *)&in,
(xdrproc_t)xdr_void, (void *)out)) != RPC_SUCCESS) {
yp_error("failed to send 'clear' to local ypserv: %s",
clnt_sperrno((enum clnt_stat) stat));
ypxfr_exit(YPXFR_CLEAR, ypxfr_temp_map);
}
}
/*
* Put the new map in place immediately. I'm not sure if the
* kernel does an unlink() and rename() atomically in the event
* that we move a new copy of a map over the top of an existing
* one, but there's less chance of a race condition happening
* than if we were to do the unlink() ourselves.
*/
if (rename(ypxfr_temp_map, buf) == -1) {
yp_error("rename(%s,%s) failed: %s", ypxfr_temp_map, buf,
strerror(errno));
ypxfr_exit(YPXFR_FILE,NULL);
}
ypxfr_exit(YPXFR_SUCC,NULL);
return(1);
}
int
ypmap_update(char *netname, char *map, unsigned int op, unsigned int keylen,
char *keyval, unsigned int datlen, char *datval)
{
DB *dbp;
DBT key = { NULL, 0 }, data = { NULL, 0 };
char *yp_last = "YP_LAST_MODIFIED";
char yplastbuf[YPMAXRECORD];
char *domptr;
int rval = 0;
if ((domptr = strchr(netname, '@')) == NULL)
return(ERR_ACCESS);
domptr++;
dbp = yp_open_db_rw(domptr, map, O_RDWR);
if (dbp == NULL)
return(ERR_DBASE);
key.data = keyval;
key.size = keylen;
data.data = datval;
data.size = datlen;
switch (op) {
case YPOP_DELETE: /* delete this entry */
rval = yp_del_record(dbp, &key);
if (rval == YP_TRUE)
rval = 0;
break;
case YPOP_INSERT: /* add, do not change */
rval = yp_put_record(dbp, &key, &data, 0);
if (rval == YP_TRUE)
rval = 0;
break;
case YPOP_STORE: /* add, or change */
rval = yp_put_record(dbp, &key, &data, 1);
if (rval == YP_TRUE)
rval = 0;
break;
case YPOP_CHANGE: /* change, do not add */
if (yp_get_record(domptr, map, &key, &data, 0) != YP_TRUE) {
rval = ERR_KEY;
break;
}
rval = yp_put_record(dbp, &key, &data, 1);
if (rval == YP_TRUE)
rval = 0;
break;
default:
yp_error("unknown update command: (%d)", op);
}
if (rval) {
(void)(dbp->close)(dbp);
return(rval);
}
snprintf(yplastbuf, sizeof(yplastbuf), "%jd", (intmax_t)time(NULL));
key.data = yp_last;
key.size = strlen(yp_last);
data.data = (char *)&yplastbuf;
data.size = strlen(yplastbuf);
if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
yp_error("failed to update timestamp in %s/%s", domptr, map);
(void)(dbp->close)(dbp);
return(ERR_DBASE);
}
(void)(dbp->close)(dbp);
return(yp_domake(map, domptr));
}
