#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)clnt_udp.c 1.39 87/08/11 Copyr 1984 Sun Micro";
#endif
#include <stdio.h>
#include <unistd.h>
#include <gssrpc/rpc.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#if defined(sun)
#include <sys/filio.h>
#endif
#include <netdb.h>
#include <errno.h>
#include <string.h>
#include <gssrpc/pmap_clnt.h>
#include <errno.h>
static enum clnt_stat clntudp_call(CLIENT *, rpcproc_t, xdrproc_t, void *,
xdrproc_t, void *, struct timeval);
static void clntudp_abort(CLIENT *);
static void clntudp_geterr(CLIENT *, struct rpc_err *);
static bool_t clntudp_freeres(CLIENT *, xdrproc_t, void *);
static bool_t clntudp_control(CLIENT *, int, void *);
static void clntudp_destroy(CLIENT *);
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 sockaddr_in cu_laddr;
int cu_llen;
struct timeval cu_wait;
struct timeval cu_total;
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(
struct sockaddr_in *raddr,
rpcprog_t program,
rpcvers_t version,
struct timeval wait,
register int *sockp,
u_int sendsz,
u_int recvsz)
{
CLIENT *cl;
register struct cu_data *cu = 0;
struct timeval now;
struct rpc_msg call_msg;
cl = (CLIENT *)mem_alloc(sizeof(CLIENT));
if (cl == NULL) {
(void) fprintf(stderr, "clntudp_create: out of memory\n");
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) {
(void) fprintf(stderr, "clntudp_create: out of memory\n");
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
goto fooy;
}
cu->cu_outbuf = &cu->cu_inbuf[recvsz];
(void)gettimeofday(&now, (struct timezone *)0);
if (raddr->sin_port == 0) {
u_short port;
if ((port =
pmap_getport(raddr, program, version, IPPROTO_UDP)) == 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_wait = wait;
cu->cu_total.tv_sec = -1;
cu->cu_total.tv_usec = -1;
cu->cu_sendsz = sendsz;
cu->cu_recvsz = recvsz;
call_msg.rm_xid = getpid() ^ now.tv_sec ^ now.tv_usec;
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;
} else {
cu->cu_closeit = FALSE;
}
if (connect(*sockp, (struct sockaddr *)raddr, sizeof(*raddr)) < 0)
goto fooy;
cu->cu_llen = sizeof(cu->cu_laddr);
if (getsockname(*sockp, (struct sockaddr *)&cu->cu_laddr, &cu->cu_llen) < 0)
goto fooy;
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 ((CLIENT *)NULL);
}
CLIENT *
clntudp_create(
struct sockaddr_in *raddr,
rpcprog_t program,
rpcvers_t version,
struct timeval wait,
register int *sockp)
{
return(clntudp_bufcreate(raddr, program, version, wait, sockp,
UDPMSGSIZE, UDPMSGSIZE));
}
static enum clnt_stat
clntudp_call(
register CLIENT *cl,
rpcproc_t proc,
xdrproc_t xargs,
void * argsp,
xdrproc_t xresults,
void * resultsp,
struct timeval utimeout
)
{
register struct cu_data *cu = (struct cu_data *)cl->cl_private;
register XDR *xdrs;
register int outlen;
register int inlen;
int fromlen;
#ifdef FD_SETSIZE
fd_set readfds;
fd_set mask;
#else
int readfds;
register int mask;
#endif
struct sockaddr_in from;
struct rpc_msg reply_msg;
XDR reply_xdrs;
struct timeval time_waited, seltimeout;
bool_t ok;
int nrefreshes = 2;
struct timeval timeout;
long procl = proc;
if (cu->cu_total.tv_usec == -1) {
timeout = utimeout;
} else {
timeout = cu->cu_total;
}
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);
(*(uint32_t *)(void *)(cu->cu_outbuf))++;
if ((! XDR_PUTLONG(xdrs, &procl)) ||
(! AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
(! AUTH_WRAP(cl->cl_auth, xdrs, xargs, argsp)))
return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
outlen = (int)XDR_GETPOS(xdrs);
send_again:
if (send(cu->cu_sock, cu->cu_outbuf, (u_int)outlen, 0) != 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 = gssrpc__null_auth;
reply_msg.acpted_rply.ar_results.where = NULL;
reply_msg.acpted_rply.ar_results.proc = xdr_void;
#ifdef FD_SETSIZE
FD_ZERO(&mask);
FD_SET(cu->cu_sock, &mask);
#else
mask = 1 << cu->cu_sock;
#endif
for (;;) {
readfds = mask;
seltimeout = cu->cu_wait;
switch (select(gssrpc__rpc_dtablesize(), &readfds, (fd_set *)NULL,
(fd_set *)NULL, &seltimeout)) {
case 0:
time_waited.tv_sec += cu->cu_wait.tv_sec;
time_waited.tv_usec += cu->cu_wait.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,
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);
}
if (inlen < sizeof(uint32_t))
continue;
if (*((uint32_t *)(void *)(cu->cu_inbuf)) !=
*((uint32_t *)(void *)(cu->cu_outbuf)))
continue;
break;
}
xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)inlen, XDR_DECODE);
ok = xdr_replymsg(&reply_xdrs, &reply_msg);
if (ok) {
gssrpc__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;
} else if (! AUTH_UNWRAP(cl->cl_auth, &reply_xdrs,
xresults, resultsp)) {
if (cu->cu_error.re_status == RPC_SUCCESS)
cu->cu_error.re_status = RPC_CANTDECODERES;
}
}
else {
if (nrefreshes > 0 &&
AUTH_REFRESH(cl->cl_auth, &reply_msg)) {
nrefreshes--;
goto call_again;
}
}
if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
(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 {
enum xdr_op op = reply_xdrs.x_op;
reply_xdrs.x_op = XDR_FREE;
xdr_replymsg(&reply_xdrs, &reply_msg);
reply_xdrs.x_op = op;
return (RPC_CANTDECODERES);
cu->cu_error.re_status = RPC_CANTDECODERES;
}
return (cu->cu_error.re_status);
}
static void
clntudp_geterr(
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(
CLIENT *cl,
xdrproc_t xdr_res,
void *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));
}
static void
clntudp_abort(CLIENT *h)
{
}
static bool_t
clntudp_control(
CLIENT *cl,
int request,
void *info)
{
register struct cu_data *cu = (struct cu_data *)cl->cl_private;
switch (request) {
case CLSET_TIMEOUT:
cu->cu_total = *(struct timeval *)info;
break;
case CLGET_TIMEOUT:
*(struct timeval *)info = cu->cu_total;
break;
case CLSET_RETRY_TIMEOUT:
cu->cu_wait = *(struct timeval *)info;
break;
case CLGET_RETRY_TIMEOUT:
*(struct timeval *)info = cu->cu_wait;
break;
case CLGET_SERVER_ADDR:
*(struct sockaddr_in *)info = cu->cu_raddr;
break;
case CLGET_LOCAL_ADDR:
*(struct sockaddr_in *)info = cu->cu_laddr;
break;
default:
return (FALSE);
}
return (TRUE);
}
static void
clntudp_destroy(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));
}