#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$Id: clnt_udp.c,v 1.4 2002/03/15 22:07:49 majka Exp $";
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <netdb.h>
#include <errno.h>
#include <rpc/pmap_clnt.h>
extern int bindresvport();
extern bool_t xdr_opaque_auth();
extern u_short pmap_getport_timeout(struct sockaddr_in *address, uint32_t program, uint32_t version, uint32_t protocol, struct timeval *timeout, struct timeval *totaltimeout);
extern int errno;
static enum clnt_stat clntudp_call();
static void clntudp_abort();
static void clntudp_geterr();
static bool_t clntudp_freeres();
static bool_t clntudp_control();
static void clntudp_destroy();
static struct clnt_ops udp_ops = {
clntudp_call,
clntudp_abort,
clntudp_geterr,
clntudp_freeres,
clntudp_destroy,
clntudp_control
};
struct cu_data {
int cu_sock;
bool_t cu_closeit;
struct sockaddr_in cu_raddr;
int cu_rlen;
struct timeval cu_retry_timeout;
struct timeval cu_total_timeout;
struct rpc_err cu_error;
XDR cu_outxdrs;
u_int cu_xdrpos;
u_int cu_sendsz;
char *cu_outbuf;
u_int cu_recvsz;
char cu_inbuf[1];
};
CLIENT *
clntudp_bufcreate_timeout(struct sockaddr_in *raddr, uint32_t program, uint32_t version, int *sockp, uint32_t sendsz, uint32_t recvsz, struct timeval *retry_timeout, struct timeval *total_timeout)
{
CLIENT *cl;
struct cu_data *cu = NULL;
struct timeval now;
struct rpc_msg call_msg;
int rfd;
u_short port;
socklen_t len;
unsigned int rsize;
cl = (CLIENT *)mem_alloc(sizeof(CLIENT));
if (cl == NULL)
{
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
goto fooy;
}
sendsz = ((sendsz + 3) / 4) * 4;
recvsz = ((recvsz + 3) / 4) * 4;
cu = (struct cu_data *)mem_alloc(sizeof(*cu) + sendsz + recvsz);
if (cu == NULL)
{
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
goto fooy;
}
cu->cu_outbuf = &cu->cu_inbuf[recvsz];
if (raddr->sin_port == 0)
{
port = pmap_getport_timeout(raddr, program, version, IPPROTO_UDP, retry_timeout, total_timeout);
if (port == 0) goto fooy;
raddr->sin_port = htons(port);
}
cl->cl_ops = &udp_ops;
cl->cl_private = (caddr_t)cu;
cu->cu_raddr = *raddr;
cu->cu_rlen = sizeof (cu->cu_raddr);
cu->cu_sendsz = sendsz;
cu->cu_recvsz = recvsz;
cu->cu_retry_timeout.tv_sec = 1;
cu->cu_retry_timeout.tv_usec = 0;
if (retry_timeout != NULL) cu->cu_retry_timeout = *retry_timeout;
cu->cu_total_timeout.tv_sec = -1;
cu->cu_total_timeout.tv_usec = -1;
if (total_timeout != NULL) cu->cu_total_timeout = *total_timeout;
rfd = open("/dev/random", O_RDONLY, 0);
if ((rfd < 0) || (read(rfd, &call_msg.rm_xid, sizeof(call_msg.rm_xid)) != sizeof(call_msg.rm_xid)))
{
gettimeofday(&now, (struct timezone *)0);
call_msg.rm_xid = getpid() ^ now.tv_sec ^ now.tv_usec;
}
if (rfd > 0) close(rfd);
call_msg.rm_direction = CALL;
call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
call_msg.rm_call.cb_prog = program;
call_msg.rm_call.cb_vers = version;
xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf, sendsz, XDR_ENCODE);
if (! xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) goto fooy;
cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs));
if (*sockp < 0)
{
int dontblock = 1;
*sockp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (*sockp < 0)
{
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
goto fooy;
}
(void)bindresvport(*sockp, (struct sockaddr_in *)0);
(void)ioctl(*sockp, FIONBIO, (char *) &dontblock);
cu->cu_closeit = TRUE;
rsize = 0;
len = sizeof(rsize);
if (getsockopt(*sockp, SOL_SOCKET, SO_RCVBUF, (char *)&rsize, &len) != 0)
{
close(*sockp);
*sockp = -1;
goto fooy;
}
len = sizeof(recvsz);
if ((recvsz > rsize) && (setsockopt(*sockp, SOL_SOCKET, SO_RCVBUF, (char *)&recvsz, len)))
{
close(*sockp);
*sockp = -1;
goto fooy;
}
}
else
{
cu->cu_closeit = FALSE;
}
cu->cu_sock = *sockp;
cl->cl_auth = authnone_create();
return (cl);
fooy:
if (cu) mem_free((caddr_t)cu, sizeof(*cu) + sendsz + recvsz);
if (cl) mem_free((caddr_t)cl, sizeof(CLIENT));
return NULL;
}
CLIENT *
clntudp_bufcreate(raddr, program, version, wait, sockp, sendsz, recvsz)
#ifdef __LP64__
struct sockaddr_in *raddr;
uint32_t program;
uint32_t version;
struct timeval wait;
int *sockp;
uint32_t sendsz;
uint32_t recvsz;
#else
struct sockaddr_in *raddr;
u_long program;
u_long version;
struct timeval wait;
register int *sockp;
u_int sendsz;
u_int recvsz;
#endif
{
return clntudp_bufcreate_timeout(raddr, (uint32_t)program, (uint32_t)version, sockp, (uint32_t)sendsz, (uint32_t)recvsz, &wait, NULL);
}
CLIENT *
clntudp_create(raddr, program, version, wait, sockp)
#ifdef __LP64__
struct sockaddr_in *raddr;
uint32_t program;
uint32_t version;
struct timeval wait;
int *sockp;
#else
struct sockaddr_in *raddr;
u_long program;
u_long version;
struct timeval wait;
register int *sockp;
#endif
{
return clntudp_bufcreate(raddr, program, version, wait, sockp, UDPMSGSIZE, UDPMSGSIZE);
}
static enum clnt_stat
clntudp_call(cl, proc, xargs, argsp, xresults, resultsp, utimeout)
register CLIENT *cl;
#ifdef __LP64__
uint32_t proc;
#else
u_long proc;
#endif
xdrproc_t xargs;
caddr_t argsp;
xdrproc_t xresults;
caddr_t resultsp;
struct timeval utimeout;
{
register struct cu_data *cu = (struct cu_data *)cl->cl_private;
register XDR *xdrs;
register int outlen;
register int inlen;
u_int32_t fromlen;
fd_set readfds;
fd_set mask;
struct sockaddr_in from;
struct rpc_msg reply_msg;
XDR reply_xdrs;
struct timeval time_waited;
bool_t ok;
int nrefreshes = 2;
struct timeval timeout;
if (cu->cu_total_timeout.tv_sec == -1)
{
timeout = utimeout;
}
else
{
timeout = cu->cu_total_timeout;
}
time_waited.tv_sec = 0;
time_waited.tv_usec = 0;
call_again:
xdrs = &(cu->cu_outxdrs);
xdrs->x_op = XDR_ENCODE;
XDR_SETPOS(xdrs, cu->cu_xdrpos);
(*(u_short *)(cu->cu_outbuf))++;
#ifdef __LP64__
if ((! XDR_PUTLONG(xdrs, (int *)&proc)) ||
(! AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
(! (*xargs)(xdrs, argsp, 0)))
return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
#else
if ((! XDR_PUTLONG(xdrs, (long *)&proc)) ||
(! AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
(! (*xargs)(xdrs, argsp, 0)))
return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
#endif
outlen = (int)XDR_GETPOS(xdrs);
send_again:
if (sendto(cu->cu_sock, cu->cu_outbuf, outlen, 0, (struct sockaddr *)&(cu->cu_raddr), cu->cu_rlen) != outlen)
{
cu->cu_error.re_errno = errno;
return (cu->cu_error.re_status = RPC_CANTSEND);
}
if (timeout.tv_sec == 0 && timeout.tv_usec == 0)
{
return (cu->cu_error.re_status = RPC_TIMEDOUT);
}
reply_msg.acpted_rply.ar_verf = _null_auth;
reply_msg.acpted_rply.ar_results.where = resultsp;
reply_msg.acpted_rply.ar_results.proc = xresults;
FD_ZERO(&mask);
FD_SET(cu->cu_sock, &mask);
for (;;)
{
readfds = mask;
switch (select(cu->cu_sock+1, &readfds, NULL, NULL, &(cu->cu_retry_timeout))) {
case 0:
time_waited.tv_sec += cu->cu_retry_timeout.tv_sec;
time_waited.tv_usec += cu->cu_retry_timeout.tv_usec;
while (time_waited.tv_usec >= 1000000) {
time_waited.tv_sec++;
time_waited.tv_usec -= 1000000;
}
if ((time_waited.tv_sec < timeout.tv_sec) ||
((time_waited.tv_sec == timeout.tv_sec) &&
(time_waited.tv_usec < timeout.tv_usec)))
goto send_again;
return (cu->cu_error.re_status = RPC_TIMEDOUT);
case -1:
if (errno == EINTR)
continue;
cu->cu_error.re_errno = errno;
return (cu->cu_error.re_status = RPC_CANTRECV);
}
do {
fromlen = sizeof(struct sockaddr);
inlen = recvfrom(cu->cu_sock, cu->cu_inbuf,
(int) cu->cu_recvsz, 0,
(struct sockaddr *)&from, &fromlen);
} while (inlen < 0 && errno == EINTR);
if (inlen < 0) {
if (errno == EWOULDBLOCK)
continue;
cu->cu_error.re_errno = errno;
return (cu->cu_error.re_status = RPC_CANTRECV);
}
#ifdef __LP64__
if (inlen < sizeof(uint32_t))
continue;
if (*((uint32_t *)(cu->cu_inbuf)) != *((uint32_t *)(cu->cu_outbuf))) continue;
#else
if (inlen < sizeof(u_long))
continue;
if (*((u_long *)(cu->cu_inbuf)) != *((u_long *)(cu->cu_outbuf))) continue;
#endif
break;
}
xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)inlen, XDR_DECODE);
ok = xdr_replymsg(&reply_xdrs, &reply_msg);
if (ok) {
_seterr_reply(&reply_msg, &(cu->cu_error));
if (cu->cu_error.re_status == RPC_SUCCESS) {
if (! AUTH_VALIDATE(cl->cl_auth,
&reply_msg.acpted_rply.ar_verf)) {
cu->cu_error.re_status = RPC_AUTHERROR;
cu->cu_error.re_why = AUTH_INVALIDRESP;
}
if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
xdrs->x_op = XDR_FREE;
(void)xdr_opaque_auth(xdrs,
&(reply_msg.acpted_rply.ar_verf));
}
}
else {
if (nrefreshes > 0 && AUTH_REFRESH(cl->cl_auth)) {
nrefreshes--;
goto call_again;
}
}
}
else {
cu->cu_error.re_status = RPC_CANTDECODERES;
}
return (cu->cu_error.re_status);
}
static void
clntudp_geterr(cl, errp)
CLIENT *cl;
struct rpc_err *errp;
{
register struct cu_data *cu = (struct cu_data *)cl->cl_private;
*errp = cu->cu_error;
}
static bool_t
clntudp_freeres(cl, xdr_res, res_ptr)
CLIENT *cl;
xdrproc_t xdr_res;
caddr_t res_ptr;
{
register struct cu_data *cu = (struct cu_data *)cl->cl_private;
register XDR *xdrs = &(cu->cu_outxdrs);
xdrs->x_op = XDR_FREE;
return ((*xdr_res)(xdrs, res_ptr, 0));
}
static void
clntudp_abort()
{
}
static bool_t
clntudp_control(cl, request, info)
CLIENT *cl;
int request;
char *info;
{
register struct cu_data *cu = (struct cu_data *)cl->cl_private;
switch (request) {
case CLSET_TIMEOUT:
cu->cu_total_timeout = *(struct timeval *)info;
break;
case CLGET_TIMEOUT:
*(struct timeval *)info = cu->cu_total_timeout;
break;
case CLSET_RETRY_TIMEOUT:
cu->cu_retry_timeout = *(struct timeval *)info;
break;
case CLGET_RETRY_TIMEOUT:
*(struct timeval *)info = cu->cu_retry_timeout;
break;
case CLGET_SERVER_ADDR:
*(struct sockaddr_in *)info = cu->cu_raddr;
break;
default:
return (FALSE);
}
return (TRUE);
}
static void
clntudp_destroy(cl)
CLIENT *cl;
{
register struct cu_data *cu = (struct cu_data *)cl->cl_private;
if (cu->cu_closeit) {
(void)close(cu->cu_sock);
}
XDR_DESTROY(&(cu->cu_outxdrs));
mem_free((caddr_t)cu, (sizeof(*cu) + cu->cu_sendsz + cu->cu_recvsz));
mem_free((caddr_t)cl, sizeof(CLIENT));
}