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/*
* Miscellaneous functions for RPC service startup and shutdown.
*
* This code is partially snarfed from rpcgen -s tcp -s udp,
* partly written by Mark Shand, Donald Becker, and Rick
* Sladkey. It was tweaked slightly by Olaf Kirch to be
* usable by both unfsd and mountd.
*
* This software may be used for any purpose provided
* the above copyright notice is retained. It is supplied
* as is, with no warranty expressed or implied.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <memory.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include "nfslib.h"
#if SIZEOF_SOCKLEN_T - 0 == 0
#define socklen_t int
#endif
#define _RPCSVC_CLOSEDOWN 120
int _rpcpmstart = 0;
int _rpcfdtype = 0;
int _rpcsvcdirty = 0;
static void
closedown(int sig)
{
(void) signal(sig, closedown);
if (_rpcsvcdirty == 0) {
static int size;
int i, openfd;
if (_rpcfdtype == SOCK_DGRAM)
exit(0);
if (size == 0)
size = getdtablesize();
for (i = 0, openfd = 0; i < size && openfd < 2; i++)
if (FD_ISSET(i, &svc_fdset))
openfd++;
if (openfd <= 1)
exit(0);
}
(void) alarm(_RPCSVC_CLOSEDOWN);
}
/*
* Create listener socket for a given port
*
* Return an open network socket on success; otherwise return -1
* if some error occurs.
*/
static int
makesock(int port, int proto)
{
struct sockaddr_in sin;
int sock, sock_type, val;
sock_type = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM;
sock = socket(AF_INET, sock_type, proto);
if (sock < 0) {
xlog(L_FATAL, "Could not make a socket: %s",
strerror(errno));
return -1;
}
memset((char *) &sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_ANY);
sin.sin_port = htons(port);
val = 1;
if (proto == IPPROTO_TCP)
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
&val, sizeof(val)) < 0)
xlog(L_ERROR, "setsockopt failed: %s",
strerror(errno));
if (bind(sock, (struct sockaddr *) &sin, sizeof(sin)) == -1) {
xlog(L_FATAL, "Could not bind name to socket: %s",
strerror(errno));
return -1;
}
return sock;
}
void
rpc_init(char *name, int prog, int vers,
void (*dispatch)(struct svc_req *, register SVCXPRT *),
int defport)
{
struct sockaddr_in saddr;
SVCXPRT *transp;
int sock;
socklen_t asize;
asize = sizeof(saddr);
sock = 0;
if (getsockname(0, (struct sockaddr *) &saddr, &asize) == 0
&& saddr.sin_family == AF_INET) {
socklen_t ssize = sizeof(int);
int fdtype = 0;
if (getsockopt(0, SOL_SOCKET, SO_TYPE,
(char *)&fdtype, &ssize) == -1)
xlog(L_FATAL, "getsockopt failed: %s", strerror(errno));
/* inetd passes a UDP socket or a listening TCP socket.
* listen will fail on a connected TCP socket(passed by rsh).
*/
if (!(fdtype == SOCK_STREAM && listen(0,5) == -1)) {
_rpcfdtype = fdtype;
_rpcpmstart = 1;
}
}
if (!_rpcpmstart) {
pmap_unset(prog, vers);
sock = RPC_ANYSOCK;
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
static SVCXPRT *last_transp = NULL;
if (_rpcpmstart == 0) {
if (last_transp
&& (!defport || defport == last_transp->xp_port)) {
transp = last_transp;
goto udp_transport;
}
if (defport == 0)
sock = RPC_ANYSOCK;
else
sock = makesock(defport, IPPROTO_UDP);
}
if (sock == RPC_ANYSOCK)
sock = svcudp_socket (prog);
transp = svcudp_create(sock);
if (transp == NULL) {
xlog(L_FATAL, "cannot create udp service.");
}
udp_transport:
if (!svc_register(transp, prog, vers, dispatch, IPPROTO_UDP)) {
xlog(L_FATAL, "unable to register (%s, %d, udp).",
name, vers);
}
last_transp = transp;
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
static SVCXPRT *last_transp = NULL;
if (_rpcpmstart == 0) {
if (last_transp
&& (!defport || defport == last_transp->xp_port)) {
transp = last_transp;
goto tcp_transport;
}
if (defport == 0)
sock = RPC_ANYSOCK;
else
sock = makesock(defport, IPPROTO_TCP);
}
if (sock == RPC_ANYSOCK)
sock = svctcp_socket (prog, 1);
transp = svctcp_create(sock, 0, 0);
if (transp == NULL) {
xlog(L_FATAL, "cannot create tcp service.");
}
tcp_transport:
if (!svc_register(transp, prog, vers, dispatch, IPPROTO_TCP)) {
xlog(L_FATAL, "unable to register (%s, %d, tcp).",
name, vers);
}
last_transp = transp;
}
if (_rpcpmstart) {
signal(SIGALRM, closedown);
alarm(_RPCSVC_CLOSEDOWN);
}
}
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