/*
* Generic client creation: takes (hostname, program-number, protocol) and
* returns client handle. Default options are set, which the user can
* change using the rpc equivalent of ioctl()'s.
*/
CLIENT *
clnt_create (const char *hostname, u_long prog, u_long vers,
const char *proto)
{
struct hostent hostbuf, *h;
size_t hstbuflen;
char *hsttmpbuf;
struct protoent protobuf, *p;
size_t prtbuflen;
char *prttmpbuf;
struct sockaddr_in sin;
struct sockaddr_un sun;
int sock;
struct timeval tv;
CLIENT *client;
int herr;
if (strcmp (proto, "unix") == 0)
{
memset ((char *)&sun, 0, sizeof (sun));
sun.sun_family = AF_UNIX;
strcpy (sun.sun_path, hostname);
sock = RPC_ANYSOCK;
client = clntunix_create (&sun, prog, vers, &sock, 0, 0);
if (client == NULL)
return NULL;
#if 0
/* This is not wanted. This would disable the user from having
a timeout in the clnt_call() call. Only a call to cnlt_control()
by the user should set the timeout value. */
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
#endif
return client;
}
hstbuflen = 1024;
hsttmpbuf = alloca (hstbuflen);
while (gethostbyname_r (hostname, &hostbuf, hsttmpbuf, hstbuflen,
&h, &herr) != 0
|| h == NULL)
if (herr != NETDB_INTERNAL || errno != ERANGE)
{
get_rpc_createerr().cf_stat = RPC_UNKNOWNHOST;
return NULL;
}
else
{
/* Enlarge the buffer. */
hstbuflen *= 2;
hsttmpbuf = alloca (hstbuflen);
}
if (h->h_addrtype != AF_INET)
{
/*
* Only support INET for now
*/
struct rpc_createerr *ce = &get_rpc_createerr ();
ce->cf_stat = RPC_SYSTEMERROR;
ce->cf_error.re_errno = EAFNOSUPPORT;
return NULL;
}
sin.sin_family = h->h_addrtype;
sin.sin_port = 0;
memset (sin.sin_zero, 0, sizeof (sin.sin_zero));
memcpy ((char *) &sin.sin_addr, h->h_addr, h->h_length);
prtbuflen = 1024;
prttmpbuf = alloca (prtbuflen);
while (getprotobyname_r (proto, &protobuf, prttmpbuf, prtbuflen, &p) != 0
|| p == NULL)
if (errno != ERANGE)
{
struct rpc_createerr *ce = &get_rpc_createerr ();
ce->cf_stat = RPC_UNKNOWNPROTO;
ce->cf_error.re_errno = EPFNOSUPPORT;
return NULL;
}
else
{
/* Enlarge the buffer. */
prtbuflen *= 2;
prttmpbuf = alloca (prtbuflen);
}
sock = RPC_ANYSOCK;
switch (p->p_proto)
{
case IPPROTO_UDP:
tv.tv_sec = 5;
tv.tv_usec = 0;
client = clntudp_create (&sin, prog, vers, tv, &sock);
if (client == NULL)
{
return NULL;
}
#if 0
/* This is not wanted. This would disable the user from having
a timeout in the clnt_call() call. Only a call to cnlt_control()
by the user should set the timeout value. */
tv.tv_sec = 25;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
#endif
break;
case IPPROTO_TCP:
client = clnttcp_create (&sin, prog, vers, &sock, 0, 0);
if (client == NULL)
{
return NULL;
}
#if 0
/* This is not wanted. This would disable the user from having
a timeout in the clnt_call() call. Only a call to cnlt_control()
by the user should set the timeout value. */
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
#endif
break;
default:
{
struct rpc_createerr *ce = &get_rpc_createerr ();
ce->cf_stat = RPC_SYSTEMERROR;
ce->cf_error.re_errno = EPFNOSUPPORT;
}
return (NULL);
}
return client;
}
/*
* Generic client creation: takes (hostname, program-number, protocol) and
* returns client handle. Default options are set, which the user can
* change using the rpc equivalent of ioctl()'s.
*/
CLIENT *
clnt_create(
const char *hostname,
rpcprog_t prog,
rpcvers_t vers,
const char *proto)
{
struct hostent *h;
struct protoent *p;
struct sockaddr_in sin;
#ifndef __rtems__
struct sockaddr_un sun;
#endif
int sock;
struct timeval tv;
CLIENT *client;
#ifndef __rtems__
if (!strcmp(proto, "unix")) {
bzero((char *)&sun, sizeof(sun));
sun.sun_family = AF_UNIX;
strcpy(sun.sun_path, hostname);
sun.sun_len = sizeof(sun.sun_len) + sizeof(sun.sun_family) +
strlen(sun.sun_path) + 1;
sock = RPC_ANYSOCK;
client = clntunix_create(&sun, prog, vers, &sock, 0, 0);
if (client == NULL)
return(NULL);
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control(client, CLSET_TIMEOUT, &tv);
return(client);
}
#endif
h = gethostbyname(hostname);
if (h == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
return (NULL);
}
if (h->h_addrtype != AF_INET) {
/*
* Only support INET for now
*/
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
return (NULL);
}
memset(&sin, 0, sizeof(sin));
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_family = h->h_addrtype;
sin.sin_port = 0;
memcpy((char*)&sin.sin_addr, h->h_addr, h->h_length);
p = getprotobyname(proto);
if (p == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
return (NULL);
}
sock = RPC_ANYSOCK;
switch (p->p_proto) {
case IPPROTO_UDP:
tv.tv_sec = 5;
tv.tv_usec = 0;
client = clntudp_create(&sin, prog, vers, tv, &sock);
if (client == NULL) {
return (NULL);
}
#if 0 /* XXX do we need this? */
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control(client, CLSET_TIMEOUT, &tv);
#endif
break;
case IPPROTO_TCP:
client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
if (client == NULL) {
return (NULL);
}
#if 0 /* XXX do we need this? */
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control(client, CLSET_TIMEOUT, &tv);
#endif
break;
default:
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
return (NULL);
}
return (client);
}
