/* @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC */
/*
* Copyright (c) 2010, Oracle America, Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the "Oracle America, Inc." nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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
*/
#include "k5-platform.h"
#include <unistd.h>
#include <gssrpc/rpc.h>
#include <gssrpc/pmap_prot.h>
#include <gssrpc/pmap_clnt.h>
#include <gssrpc/pmap_rmt.h>
#include <sys/socket.h>
#ifdef sun
#include <sys/sockio.h>
#endif
#ifdef OSF1
#include <net/route.h>
#include <sys/mbuf.h>
#endif
#include <net/if.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#define MAX_BROADCAST_SIZE 1400
#include <port-sockets.h>
#include "socket-utils.h"
static struct timeval timeout = { 3, 0 };
#ifndef GETSOCKNAME_ARG3_TYPE
#define GETSOCKNAME_ARG3_TYPE int
#endif
/*
* 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(
struct sockaddr_in *addr,
rpcprog_t prog,
rpcvers_t vers,
rpcproc_t proc,
xdrproc_t xdrargs,
caddr_t argsp,
xdrproc_t xdrres,
caddr_t resp,
struct timeval tout,
rpcport_t *port_ptr)
{
SOCKET sock = INVALID_SOCKET;
CLIENT *client;
struct rmtcallargs a;
struct rmtcallres r;
enum clnt_stat stat;
addr->sin_port = htons(PMAPPORT);
client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
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, xdr_rmtcall_args, &a,
xdr_rmtcallres, &r, tout);
CLNT_DESTROY(client);
} else {
stat = RPC_FAILED;
}
(void)closesocket(sock);
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 (xdr_u_int32(xdrs, &(cap->prog)) &&
xdr_u_int32(xdrs, &(cap->vers)) &&
xdr_u_int32(xdrs, &(cap->proc))) {
lenposition = XDR_GETPOS(xdrs);
if (! xdr_u_int32(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 = (uint32_t)position - (uint32_t)argposition;
XDR_SETPOS(xdrs, lenposition);
if (! xdr_u_int32(xdrs, &(cap->arglen)))
return (FALSE);
XDR_SETPOS(xdrs, position);
return (TRUE);
}
return (FALSE);
}
/*
* XDR remote call results
* written for XDR_DECODE direction only
*/
bool_t
xdr_rmtcallres(
XDR *xdrs,
struct rmtcallres *crp)
{
caddr_t port_ptr;
port_ptr = (caddr_t)(void *)crp->port_ptr;
if (xdr_reference(xdrs, &port_ptr, sizeof (uint32_t),
xdr_u_int32) && xdr_u_int32(xdrs, &crp->resultslen)) {
crp->port_ptr = (uint32_t *)(void *)port_ptr;
return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
}
return (FALSE);
}
/*
* 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 .
*/
#define GIFCONF_BUFSIZE (256 * sizeof (struct ifconf))
static int
getbroadcastnets(
struct in_addr *addrs,
int sock, /* any valid socket will do */
char *buf /* why allocxate more when we can use existing... */
)
{
struct ifconf ifc;
struct ifreq ifreq, *ifr;
int n, i;
ifc.ifc_len = GIFCONF_BUFSIZE;
ifc.ifc_buf = buf;
memset (buf, 0, GIFCONF_BUFSIZE);
if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
perror("broadcast: ioctl (get interface configuration)");
return (0);
}
ifr = ifc.ifc_req;
for (i = 0, n = ifc.ifc_len/sizeof (struct ifreq); n > 0; n--, ifr++) {
ifreq = *ifr;
if (ioctl(sock, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
perror("broadcast: ioctl (get interface flags)");
continue;
}
if ((ifreq.ifr_flags & IFF_BROADCAST) &&
(ifreq.ifr_flags & IFF_UP) &&
ifr->ifr_addr.sa_family == AF_INET) {
#ifdef SIOCGIFBRDADDR /* 4.3BSD */
if (ioctl(sock, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
addrs[i++].s_addr = INADDR_ANY;
} else {
addrs[i++] = sa2sin(&ifreq.ifr_addr)->sin_addr;
}
#else /* 4.2 BSD */
struct sockaddr_in *sockin;
sockin = sa2sin(&ifr->ifr_addr);
addrs[i++] = inet_makeaddr(inet_netof
(sockin->sin_addr.s_addr), INADDR_ANY);
#endif
}
}
return (i);
}
enum clnt_stat
clnt_broadcast(
rpcprog_t prog, /* program number */
rpcvers_t vers, /* version number */
rpcproc_t 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;
AUTH *unix_auth = authunix_create_default();
XDR xdr_stream;
XDR *xdrs = &xdr_stream;
int outlen, nets;
ssize_t inlen;
GETSOCKNAME_ARG3_TYPE fromlen;
SOCKET sock;
int on = 1;
#ifdef FD_SETSIZE
fd_set mask;
fd_set readfds;
#else
int readfds;
int mask;
#endif /* def FD_SETSIZE */
int i;
bool_t done = FALSE;
uint32_t xid;
rpcport_t 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;
struct timeval t, t2;
char outbuf[MAX_BROADCAST_SIZE];
#ifndef MAX
#define MAX(A,B) ((A)<(B)?(B):(A))
#endif
char inbuf[MAX (UDPMSGSIZE, GIFCONF_BUFSIZE)];
/*
* 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;
}
set_cloexec_fd(sock);
#ifdef SO_BROADCAST
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *) &on,
sizeof (on)) < 0) {
perror("Cannot set socket option SO_BROADCAST");
stat = RPC_CANTSEND;
goto done_broad;
}
#endif /* def SO_BROADCAST */
#ifdef FD_SETSIZE
FD_ZERO(&mask);
FD_SET(sock, &mask);
#else
mask = (1 << sock);
#endif /* def FD_SETSIZE */
nets = getbroadcastnets(addrs, sock, inbuf);
memset(&baddr, 0, 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); */
(void)gettimeofday(&t, (struct timezone *)0);
msg.rm_xid = xid = getpid() ^ t.tv_sec ^ t.tv_usec;
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;
xdrmem_create(xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
if ((! xdr_callmsg(xdrs, &msg)) || (! 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 = gssrpc__null_auth;
msg.acpted_rply.ar_results.where = (caddr_t)&r;
msg.acpted_rply.ar_results.proc = xdr_rmtcallres;
readfds = mask;
t2 = t;
switch (select(gssrpc__rpc_dtablesize(), &readfds, (fd_set *)NULL,
(fd_set *)NULL, &t2)) {
case 0: /* timed out */
stat = RPC_TIMEDOUT;
continue;
case -1: /* some kind of error */
if (errno == EINTR)
goto recv_again;
perror("Broadcast select problem");
stat = RPC_CANTRECV;
goto done_broad;
} /* end of select 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(uint32_t))
goto recv_again;
/*
* see if reply transaction id matches sent id.
* If so, decode the results.
*/
xdrmem_create(xdrs, inbuf, (u_int)inlen, XDR_DECODE);
if (xdr_replymsg(xdrs, &msg)) {
if ((msg.rm_xid == 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 (msg.rm_xid == xid)
fprintf(stderr, "Broadcast deserialization problem");
/* otherwise, just random garbage */
#endif
}
xdrs->x_op = XDR_FREE;
msg.acpted_rply.ar_results.proc = xdr_void;
(void)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)closesocket(sock);
AUTH_DESTROY(unix_auth);
return (stat);
}