412c954afa
Update. * sunrpc/clnt_udp.c (is_network_up): Use getifaddrs instead of ioctl. * sunrpc/get_myaddr.c (get_myaddress): Likewise. * sunrpc/pmap_clnt.c (__get_myaddress): Likewise. * sunrpc/pmap_rmt.c (getbroadcastnets): Likewise. Change interface to avoid buffer overrun and remove now useless parameters. (clnt_broadcast): Adjust caller. [BZ #381].
394 lines
11 KiB
C
394 lines
11 KiB
C
/* @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC */
|
|
/*
|
|
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
|
|
* unrestricted use provided that this legend is included on all tape
|
|
* media and as a part of the software program in whole or part. Users
|
|
* may copy or modify Sun RPC without charge, but are not authorized
|
|
* to license or distribute it to anyone else except as part of a product or
|
|
* program developed by the user.
|
|
*
|
|
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
|
|
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
|
|
*
|
|
* Sun RPC is provided with no support and without any obligation on the
|
|
* part of Sun Microsystems, Inc. to assist in its use, correction,
|
|
* modification or enhancement.
|
|
*
|
|
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
|
|
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
|
|
* OR ANY PART THEREOF.
|
|
*
|
|
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
|
|
* or profits or other special, indirect and consequential damages, even if
|
|
* Sun has been advised of the possibility of such damages.
|
|
*
|
|
* Sun Microsystems, Inc.
|
|
* 2550 Garcia Avenue
|
|
* Mountain View, California 94043
|
|
*/
|
|
#if !defined(lint) && defined(SCCSIDS)
|
|
static char sccsid[] = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";
|
|
#endif
|
|
|
|
/*
|
|
* pmap_rmt.c
|
|
* Client interface to pmap rpc service.
|
|
* remote call and broadcast service
|
|
*
|
|
* Copyright (C) 1984, Sun Microsystems, Inc.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <libintl.h>
|
|
#include <rpc/rpc.h>
|
|
#include <rpc/pmap_prot.h>
|
|
#include <rpc/pmap_clnt.h>
|
|
#include <rpc/pmap_rmt.h>
|
|
#include <sys/poll.h>
|
|
#include <sys/socket.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
|
|
#include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
|
|
#include <net/if.h>
|
|
#include <ifaddrs.h>
|
|
#include <sys/ioctl.h>
|
|
#include <arpa/inet.h>
|
|
#define MAX_BROADCAST_SIZE 1400
|
|
|
|
extern u_long _create_xid (void);
|
|
|
|
static const struct timeval timeout = {3, 0};
|
|
|
|
/*
|
|
* pmapper remote-call-service interface.
|
|
* This routine is used to call the pmapper remote call service
|
|
* which will look up a service program in the port maps, and then
|
|
* remotely call that routine with the given parameters. This allows
|
|
* programs to do a lookup and call in one step.
|
|
*/
|
|
enum clnt_stat
|
|
pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
|
|
struct sockaddr_in *addr;
|
|
u_long prog, vers, proc;
|
|
xdrproc_t xdrargs, xdrres;
|
|
caddr_t argsp, resp;
|
|
struct timeval tout;
|
|
u_long *port_ptr;
|
|
{
|
|
int socket = -1;
|
|
CLIENT *client;
|
|
struct rmtcallargs a;
|
|
struct rmtcallres r;
|
|
enum clnt_stat stat;
|
|
|
|
addr->sin_port = htons (PMAPPORT);
|
|
client = INTUSE(clntudp_create) (addr, PMAPPROG, PMAPVERS, timeout, &socket);
|
|
if (client != (CLIENT *) NULL)
|
|
{
|
|
a.prog = prog;
|
|
a.vers = vers;
|
|
a.proc = proc;
|
|
a.args_ptr = argsp;
|
|
a.xdr_args = xdrargs;
|
|
r.port_ptr = port_ptr;
|
|
r.results_ptr = resp;
|
|
r.xdr_results = xdrres;
|
|
stat = CLNT_CALL (client, PMAPPROC_CALLIT,
|
|
(xdrproc_t)INTUSE(xdr_rmtcall_args),
|
|
(caddr_t)&a, (xdrproc_t)INTUSE(xdr_rmtcallres),
|
|
(caddr_t)&r, tout);
|
|
CLNT_DESTROY (client);
|
|
}
|
|
else
|
|
{
|
|
stat = RPC_FAILED;
|
|
}
|
|
/* (void)__close(socket); CLNT_DESTROY already closed it */
|
|
addr->sin_port = 0;
|
|
return stat;
|
|
}
|
|
|
|
|
|
/*
|
|
* XDR remote call arguments
|
|
* written for XDR_ENCODE direction only
|
|
*/
|
|
bool_t
|
|
xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)
|
|
{
|
|
u_int lenposition, argposition, position;
|
|
|
|
if (INTUSE(xdr_u_long) (xdrs, &(cap->prog)) &&
|
|
INTUSE(xdr_u_long) (xdrs, &(cap->vers)) &&
|
|
INTUSE(xdr_u_long) (xdrs, &(cap->proc)))
|
|
{
|
|
lenposition = XDR_GETPOS (xdrs);
|
|
if (!INTUSE(xdr_u_long) (xdrs, &(cap->arglen)))
|
|
return FALSE;
|
|
argposition = XDR_GETPOS (xdrs);
|
|
if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
|
|
return FALSE;
|
|
position = XDR_GETPOS (xdrs);
|
|
cap->arglen = (u_long) position - (u_long) argposition;
|
|
XDR_SETPOS (xdrs, lenposition);
|
|
if (!INTUSE(xdr_u_long) (xdrs, &(cap->arglen)))
|
|
return FALSE;
|
|
XDR_SETPOS (xdrs, position);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
INTDEF(xdr_rmtcall_args)
|
|
|
|
/*
|
|
* XDR remote call results
|
|
* written for XDR_DECODE direction only
|
|
*/
|
|
bool_t
|
|
xdr_rmtcallres (xdrs, crp)
|
|
XDR *xdrs;
|
|
struct rmtcallres *crp;
|
|
{
|
|
caddr_t port_ptr;
|
|
|
|
port_ptr = (caddr_t) crp->port_ptr;
|
|
if (INTUSE(xdr_reference) (xdrs, &port_ptr, sizeof (u_long),
|
|
(xdrproc_t) INTUSE(xdr_u_long))
|
|
&& INTUSE(xdr_u_long) (xdrs, &crp->resultslen))
|
|
{
|
|
crp->port_ptr = (u_long *) port_ptr;
|
|
return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
|
|
}
|
|
return FALSE;
|
|
}
|
|
INTDEF(xdr_rmtcallres)
|
|
|
|
|
|
/*
|
|
* The following is kludged-up support for simple rpc broadcasts.
|
|
* Someday a large, complicated system will replace these trivial
|
|
* routines which only support udp/ip .
|
|
*/
|
|
|
|
static int
|
|
internal_function
|
|
getbroadcastnets (struct in_addr *addrs, int naddrs)
|
|
{
|
|
struct ifaddrs *ifa;
|
|
|
|
if (getifaddrs (&ifa) == 0)
|
|
{
|
|
perror ("broadcast: getifaddrs");
|
|
return 0;
|
|
}
|
|
|
|
int i = 0;
|
|
struct ifaddrs *run = ifa;
|
|
while (run != NULL && i < naddrs)
|
|
{
|
|
if ((run->ifa_flags & IFF_BROADCAST) != 0
|
|
&& (run->ifa_flags & IFF_UP) != 0
|
|
&& run->ifa_addr->sa_family == AF_INET)
|
|
/* Copy the broadcast address. */
|
|
addrs[i++] = ((struct sockaddr_in *) run->ifa_broadaddr)->sin_addr;
|
|
|
|
run = run->ifa_next;
|
|
}
|
|
|
|
freeifaddrs (ifa);
|
|
|
|
return i;
|
|
}
|
|
|
|
|
|
enum clnt_stat
|
|
clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
|
|
u_long prog; /* program number */
|
|
u_long vers; /* version number */
|
|
u_long proc; /* procedure number */
|
|
xdrproc_t xargs; /* xdr routine for args */
|
|
caddr_t argsp; /* pointer to args */
|
|
xdrproc_t xresults; /* xdr routine for results */
|
|
caddr_t resultsp; /* pointer to results */
|
|
resultproc_t eachresult; /* call with each result obtained */
|
|
{
|
|
enum clnt_stat stat = RPC_FAILED;
|
|
AUTH *unix_auth = INTUSE(authunix_create_default) ();
|
|
XDR xdr_stream;
|
|
XDR *xdrs = &xdr_stream;
|
|
struct timeval t;
|
|
int outlen, inlen, nets;
|
|
socklen_t fromlen;
|
|
int sock;
|
|
int on = 1;
|
|
struct pollfd fd;
|
|
int milliseconds;
|
|
int i;
|
|
bool_t done = FALSE;
|
|
u_long xid;
|
|
u_long port;
|
|
struct in_addr addrs[20];
|
|
struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
|
|
struct rmtcallargs a;
|
|
struct rmtcallres r;
|
|
struct rpc_msg msg;
|
|
char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
|
|
|
|
/*
|
|
* initialization: create a socket, a broadcast address, and
|
|
* preserialize the arguments into a send buffer.
|
|
*/
|
|
if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
{
|
|
perror (_("Cannot create socket for broadcast rpc"));
|
|
stat = RPC_CANTSEND;
|
|
goto done_broad;
|
|
}
|
|
#ifdef SO_BROADCAST
|
|
if (__setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
|
|
{
|
|
perror (_("Cannot set socket option SO_BROADCAST"));
|
|
stat = RPC_CANTSEND;
|
|
goto done_broad;
|
|
}
|
|
#endif /* def SO_BROADCAST */
|
|
fd.fd = sock;
|
|
fd.events = POLLIN;
|
|
nets = getbroadcastnets (addrs, sizeof (addrs) / sizeof (addrs[0]));
|
|
__bzero ((char *) &baddr, sizeof (baddr));
|
|
baddr.sin_family = AF_INET;
|
|
baddr.sin_port = htons (PMAPPORT);
|
|
baddr.sin_addr.s_addr = htonl (INADDR_ANY);
|
|
/* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
|
|
msg.rm_xid = xid = _create_xid ();
|
|
t.tv_usec = 0;
|
|
msg.rm_direction = CALL;
|
|
msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
|
|
msg.rm_call.cb_prog = PMAPPROG;
|
|
msg.rm_call.cb_vers = PMAPVERS;
|
|
msg.rm_call.cb_proc = PMAPPROC_CALLIT;
|
|
msg.rm_call.cb_cred = unix_auth->ah_cred;
|
|
msg.rm_call.cb_verf = unix_auth->ah_verf;
|
|
a.prog = prog;
|
|
a.vers = vers;
|
|
a.proc = proc;
|
|
a.xdr_args = xargs;
|
|
a.args_ptr = argsp;
|
|
r.port_ptr = &port;
|
|
r.xdr_results = xresults;
|
|
r.results_ptr = resultsp;
|
|
INTUSE(xdrmem_create) (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
|
|
if ((!INTUSE(xdr_callmsg) (xdrs, &msg))
|
|
|| (!INTUSE(xdr_rmtcall_args) (xdrs, &a)))
|
|
{
|
|
stat = RPC_CANTENCODEARGS;
|
|
goto done_broad;
|
|
}
|
|
outlen = (int) xdr_getpos (xdrs);
|
|
xdr_destroy (xdrs);
|
|
/*
|
|
* Basic loop: broadcast a packet and wait a while for response(s).
|
|
* The response timeout grows larger per iteration.
|
|
*/
|
|
for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
|
|
{
|
|
for (i = 0; i < nets; i++)
|
|
{
|
|
baddr.sin_addr = addrs[i];
|
|
if (__sendto (sock, outbuf, outlen, 0,
|
|
(struct sockaddr *) &baddr,
|
|
sizeof (struct sockaddr)) != outlen)
|
|
{
|
|
perror (_("Cannot send broadcast packet"));
|
|
stat = RPC_CANTSEND;
|
|
goto done_broad;
|
|
}
|
|
}
|
|
if (eachresult == NULL)
|
|
{
|
|
stat = RPC_SUCCESS;
|
|
goto done_broad;
|
|
}
|
|
recv_again:
|
|
msg.acpted_rply.ar_verf = _null_auth;
|
|
msg.acpted_rply.ar_results.where = (caddr_t) & r;
|
|
msg.acpted_rply.ar_results.proc = (xdrproc_t) INTUSE(xdr_rmtcallres);
|
|
milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
|
|
switch (__poll(&fd, 1, milliseconds))
|
|
{
|
|
|
|
case 0: /* timed out */
|
|
stat = RPC_TIMEDOUT;
|
|
continue;
|
|
|
|
case -1: /* some kind of error */
|
|
if (errno == EINTR)
|
|
goto recv_again;
|
|
perror (_("Broadcast poll problem"));
|
|
stat = RPC_CANTRECV;
|
|
goto done_broad;
|
|
|
|
} /* end of poll results switch */
|
|
try_again:
|
|
fromlen = sizeof (struct sockaddr);
|
|
inlen = __recvfrom (sock, inbuf, UDPMSGSIZE, 0,
|
|
(struct sockaddr *) &raddr, &fromlen);
|
|
if (inlen < 0)
|
|
{
|
|
if (errno == EINTR)
|
|
goto try_again;
|
|
perror (_("Cannot receive reply to broadcast"));
|
|
stat = RPC_CANTRECV;
|
|
goto done_broad;
|
|
}
|
|
if ((size_t) inlen < sizeof (u_long))
|
|
goto recv_again;
|
|
/*
|
|
* see if reply transaction id matches sent id.
|
|
* If so, decode the results.
|
|
*/
|
|
INTUSE(xdrmem_create) (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
|
|
if (INTUSE(xdr_replymsg) (xdrs, &msg))
|
|
{
|
|
if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
|
|
(msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
|
|
(msg.acpted_rply.ar_stat == SUCCESS))
|
|
{
|
|
raddr.sin_port = htons ((u_short) port);
|
|
done = (*eachresult) (resultsp, &raddr);
|
|
}
|
|
/* otherwise, we just ignore the errors ... */
|
|
}
|
|
else
|
|
{
|
|
#ifdef notdef
|
|
/* some kind of deserialization problem ... */
|
|
if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
|
|
fprintf (stderr, "Broadcast deserialization problem");
|
|
/* otherwise, just random garbage */
|
|
#endif
|
|
}
|
|
xdrs->x_op = XDR_FREE;
|
|
msg.acpted_rply.ar_results.proc = (xdrproc_t)INTUSE(xdr_void);
|
|
(void) INTUSE(xdr_replymsg) (xdrs, &msg);
|
|
(void) (*xresults) (xdrs, resultsp);
|
|
xdr_destroy (xdrs);
|
|
if (done)
|
|
{
|
|
stat = RPC_SUCCESS;
|
|
goto done_broad;
|
|
}
|
|
else
|
|
{
|
|
goto recv_again;
|
|
}
|
|
}
|
|
done_broad:
|
|
(void) __close (sock);
|
|
AUTH_DESTROY (unix_auth);
|
|
return stat;
|
|
}
|