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daemon.c
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/*
* UNFS3 server framework
* Originally generated using rpcgen
* Portions (C) 2004, Pascal Schmidt
* see file LICENSE for license details
*/
#include "config.h"
#include <sys/file.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <rpc/rpc.h>
#ifndef WIN32
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <syslog.h>
#else /* WIN32 */
#include <winsock.h>
#endif /* WIN32 */
#include <fcntl.h>
#include <memory.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#ifdef HAVE_RPC_SVC_SOC_H
# include <rpc/svc_soc.h>
#endif
#if defined(HAVE_SVC_GETREQ_POLL) && HAVE_DECL_SVC_POLLFD
# include <sys/poll.h>
#endif
#include "nfs.h"
#include "mount.h"
#include "xdr.h"
#include "fh.h"
#include "fh_cache.h"
#include "fd_cache.h"
#include "user.h"
#include "daemon.h"
#include "backend.h"
#include "Config/exports.h"
#ifndef SIG_PF
#define SIG_PF void(*)(int)
#endif
#define UNFS_NAME "UNFS3 unfsd " PACKAGE_VERSION " (C) 2009, Pascal Schmidt <[email protected]>\n"
/* write verifier */
writeverf3 wverf;
/* readdir cookie */
cookie3 rcookie = 0;
/* options and default values */
int opt_detach = TRUE;
char *opt_exports = "/etc/exports";
int opt_cluster = FALSE;
char *opt_cluster_path = "/";
int opt_tcponly = FALSE;
unsigned int opt_nfs_port = NFS_PORT; /* 0 means RPC_ANYSOCK */
unsigned int opt_mount_port = NFS_PORT;
int opt_singleuser = FALSE;
int opt_brute_force = FALSE;
int opt_testconfig = FALSE;
struct in6_addr opt_bind_addr;
int opt_readable_executables = FALSE;
char *opt_pid_file = NULL;
FILE *opt_port_file = NULL;
/* Register with portmapper? */
int opt_portmapper = TRUE;
/*
* output message to syslog or stdout
*/
void logmsg(int prio, const char *fmt, ...)
{
va_list ap;
#if HAVE_VSYSLOG == 0
char mesg[1024];
#endif
va_start(ap, fmt);
if (opt_detach) {
#if HAVE_VSYSLOG == 1
vsyslog(prio, fmt, ap);
#else
vsnprintf(mesg, 1024, fmt, ap);
syslog(prio, mesg, 1024);
#endif
} else {
vprintf(fmt, ap);
putchar('\n');
}
va_end(ap);
}
/*
* return remote address from svc_req structure
*/
int get_remote(struct svc_req *rqstp, struct in6_addr *addr6)
{
const struct sockaddr *saddr;
memset(addr6, 0, sizeof(struct in6_addr));
saddr = (const struct sockaddr *) svc_getrpccaller(rqstp->rq_xprt)->buf;
if (saddr->sa_family == AF_INET6) {
memcpy(addr6, &((const struct sockaddr_in6*)saddr)->sin6_addr, sizeof(struct in6_addr));
return 0;
}
if (saddr->sa_family == AF_INET) {
((uint32_t*)addr6)[0] = 0;
((uint32_t*)addr6)[1] = 0;
((uint32_t*)addr6)[2] = htonl(0xffff);
((uint32_t*)addr6)[3] = ((const struct sockaddr_in*)saddr)->sin_addr.s_addr;
return 0;
}
errno = EAFNOSUPPORT;
return -1;
}
/*
* return remote port from svc_req structure
*/
short get_port(struct svc_req *rqstp)
{
return (svc_getcaller(rqstp->rq_xprt))->sin6_port;
}
/*
* return the socket type of the request (SOCK_STREAM or SOCK_DGRAM)
*/
int get_socket_type(struct svc_req *rqstp)
{
int v, res;
socklen_t l;
l = sizeof(v);
res = getsockopt(rqstp->rq_xprt->xp_fd, SOL_SOCKET, SO_TYPE, &v, &l);
if (res < 0) {
logmsg(LOG_CRIT, "unable to determine socket type");
return -1;
}
return v;
}
/*
* return the server port of the transport
*/
unsigned short get_server_port(SVCXPRT *transp)
{
struct sockaddr_in6 addr_buf;
struct sockaddr *addr = (struct sockaddr *) &addr_buf;
socklen_t len = sizeof(addr_buf);
if (getsockname(transp->xp_fd, addr, &len) < 0) {
logmsg(LOG_CRIT, "unable to determine server port");
daemon_exit(0);
}
if (addr->sa_family == AF_INET6) {
return ntohs(((const struct sockaddr_in6*)addr)->sin6_port);
}
if (addr->sa_family == AF_INET) {
return ntohs(((const struct sockaddr_in*)addr)->sin_port);
}
// should never happen since we create the socket
logmsg(LOG_CRIT, "unable to determine server port - unknown socket family");
daemon_exit(0);
exit(1); // to supress compiler warning
}
static void write_to_port_file(SVCXPRT *transp, rpcprog_t prognum, rpcvers_t versnum, int socktype)
{
char *program;
char *protocol;
unsigned short port;
if (prognum == MOUNTPROG && versnum == MOUNTVERS1) {
// skip vers 1 as it is same as vers 3
return;
}
port = get_server_port(transp);
switch (prognum) {
case NFS3_PROGRAM:
program = "NFS";
break;
case MOUNTPROG:
program = "MOUNT";
break;
default:
logmsg(LOG_CRIT, "unknown prognum");
daemon_exit(0);
}
switch (socktype) {
case SOCK_DGRAM:
protocol = "UDP";
break;
case SOCK_STREAM:
protocol = "TCP";
break;
default:
logmsg(LOG_CRIT, "unknown socket type");
daemon_exit(0);
}
if (opt_port_file == NULL) {
logmsg(LOG_CRIT, "port file not specified");
daemon_exit(0);
}
fprintf(opt_port_file, "%s_%s=%hu\n", program, protocol, port);
}
/*
* write current pid to a file
*/
static void create_pid_file(void)
{
char buf[16];
int fd, res, len;
if (!opt_pid_file)
return;
fd = backend_open_create(opt_pid_file, O_RDWR | O_CREAT | O_TRUNC, 0644);
if (fd == -1) {
logmsg(LOG_WARNING, "failed to create pid file `%s'", opt_pid_file);
return;
}
#if defined(LOCK_EX) && defined(LOCK_NB)
res = backend_flock(fd, LOCK_EX | LOCK_NB);
if (res == -1) {
logmsg(LOG_WARNING, "failed to lock pid file `%s'", opt_pid_file);
backend_close(fd);
return;
}
#endif
sprintf(buf, "%i\n", backend_getpid());
len = strlen(buf);
res = backend_pwrite(fd, buf, len, 0);
backend_close(fd);
if (res != len) {
logmsg(LOG_WARNING, "failed to write pid file `%s'", opt_pid_file);
}
}
/*
* remove pid file
*/
static void remove_pid_file(void)
{
int res;
if (!opt_pid_file)
return;
res = backend_remove(opt_pid_file);
if (res == -1 && errno != ENOENT) {
logmsg(LOG_WARNING, "failed to remove pid file `%s'", opt_pid_file);
}
}
/*
* parse command line options
*/
static void parse_options(int argc, char **argv)
{
int opt = 0;
char *optstring = "bcC:de:hl:m:n:prstTuwi:P:";
while (opt != -1) {
opt = getopt(argc, argv, optstring);
switch (opt) {
case 'b':
opt_brute_force = TRUE;
break;
#ifdef WANT_CLUSTER
case 'c':
opt_cluster = TRUE;
break;
case 'C':
opt_cluster_path = optarg;
break;
#endif
case 'd':
printf(UNFS_NAME);
opt_detach = FALSE;
break;
case 'e':
#ifndef WIN32
if (optarg[0] != '/') {
/* A relative path won't work for re-reading the exports
file on SIGHUP, since we are changing directory */
fprintf(stderr, "Error: relative path to exports file\n");
exit(1);
}
#endif
opt_exports = optarg;
break;
case 'P':
opt_port_file = fopen(optarg, "w");
if (opt_port_file == NULL) {
perror("Cannot open port file");
exit(1);
}
break;
case 'h':
printf(UNFS_NAME);
printf("Usage: %s [options]\n", argv[0]);
printf("\t-h display this short option summary\n");
printf("\t-u use unprivileged port for services\n");
printf("\t-d do not detach from terminal\n");
printf("\t-e <file> file to use instead of /etc/exports\n");
printf("\t-i <file> write daemon pid to given file\n");
printf("\t-P <file> write NFS and MOUNT ports to given file\n");
#ifdef WANT_CLUSTER
printf("\t-c enable cluster extensions\n");
printf("\t-C <path> set path for cluster extensions\n");
#endif
printf("\t-n <port> port to use for NFS service\n");
printf("\t-m <port> port to use for MOUNT service\n");
printf
("\t-t TCP only, do not listen on UDP ports\n");
printf("\t-p do not register with portmap/rpcbind\n");
printf("\t-s single user mode\n");
printf("\t-b enable brute force file searching\n");
printf
("\t-l <addr> bind to interface with specified address\n");
printf
("\t-r report unreadable executables as readable\n");
printf("\t-T test exports file and exit\n");
exit(0);
break;
case 'l':
if (inet_pton(AF_INET6, optarg, &opt_bind_addr) != 1) {
struct in_addr in4;
if (inet_pton(AF_INET, optarg, &in4) != 1) {
fprintf(stderr, "Invalid bind address\n");
exit(1);
}
((uint32_t*)&opt_bind_addr)[0] = 0;
((uint32_t*)&opt_bind_addr)[1] = 0;
((uint32_t*)&opt_bind_addr)[2] = htonl(0xffff);
((uint32_t*)&opt_bind_addr)[3] = in4.s_addr;
}
break;
case 'm':
opt_mount_port = strtol(optarg, NULL, 10);
if (opt_mount_port == 0) {
fprintf(stderr, "Invalid port\n");
exit(1);
}
break;
case 'n':
opt_nfs_port = strtol(optarg, NULL, 10);
if (opt_nfs_port == 0) {
fprintf(stderr, "Invalid port\n");
exit(1);
}
break;
case 'p':
opt_portmapper = FALSE;
break;
case 'r':
opt_readable_executables = TRUE;
break;
case 's':
opt_singleuser = TRUE;
#ifndef WIN32
if (backend_getuid() == 0) {
logmsg(LOG_WARNING,
"Warning: running as root with -s is dangerous");
logmsg(LOG_WARNING,
"All clients will have root access to all exported files!");
}
#endif
break;
case 't':
opt_tcponly = TRUE;
break;
case 'T':
opt_testconfig = TRUE;
break;
case 'u':
opt_nfs_port = 0;
opt_mount_port = 0;
break;
case 'i':
opt_pid_file = optarg;
break;
case '?':
exit(1);
break;
}
}
}
/*
* signal handler and error exit function
*/
void daemon_exit(int error)
{
#ifndef WIN32
if (error == SIGHUP) {
get_squash_ids();
exports_parse();
return;
}
if (error == SIGUSR1) {
if (fh_cache_use > 0)
logmsg(LOG_INFO, "fh entries %i access %i hit %i miss %i",
fh_cache_max, fh_cache_use, fh_cache_hit,
fh_cache_use - fh_cache_hit);
else
logmsg(LOG_INFO, "fh cache unused");
logmsg(LOG_INFO, "open file descriptors: read %i, write %i",
fd_cache_readers, fd_cache_writers);
return;
}
#endif /* WIN32 */
if (opt_portmapper) {
svc_unreg(MOUNTPROG, MOUNTVERS1);
svc_unreg(MOUNTPROG, MOUNTVERS3);
}
if (opt_portmapper) {
svc_unreg(NFS3_PROGRAM, NFS_V3);
}
if (error == SIGSEGV)
logmsg(LOG_EMERG, "segmentation fault");
fd_cache_purge();
if (opt_detach)
closelog();
remove_pid_file();
backend_shutdown();
exit(1);
}
/*
* NFS service dispatch function
* generated by rpcgen
*/
static void nfs3_program_3(struct svc_req *rqstp, register SVCXPRT * transp)
{
union {
GETATTR3args nfsproc3_getattr_3_arg;
SETATTR3args nfsproc3_setattr_3_arg;
LOOKUP3args nfsproc3_lookup_3_arg;
ACCESS3args nfsproc3_access_3_arg;
READLINK3args nfsproc3_readlink_3_arg;
READ3args nfsproc3_read_3_arg;
WRITE3args nfsproc3_write_3_arg;
CREATE3args nfsproc3_create_3_arg;
MKDIR3args nfsproc3_mkdir_3_arg;
SYMLINK3args nfsproc3_symlink_3_arg;
MKNOD3args nfsproc3_mknod_3_arg;
REMOVE3args nfsproc3_remove_3_arg;
RMDIR3args nfsproc3_rmdir_3_arg;
RENAME3args nfsproc3_rename_3_arg;
LINK3args nfsproc3_link_3_arg;
READDIR3args nfsproc3_readdir_3_arg;
READDIRPLUS3args nfsproc3_readdirplus_3_arg;
FSSTAT3args nfsproc3_fsstat_3_arg;
FSINFO3args nfsproc3_fsinfo_3_arg;
PATHCONF3args nfsproc3_pathconf_3_arg;
COMMIT3args nfsproc3_commit_3_arg;
} argument;
char *result;
xdrproc_t _xdr_argument, _xdr_result;
char *(*local) (char *, struct svc_req *);
switch (rqstp->rq_proc) {
case NFSPROC3_NULL:
_xdr_argument = (xdrproc_t) xdr_void;
_xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) nfsproc3_null_3_svc;
break;
case NFSPROC3_GETATTR:
_xdr_argument = (xdrproc_t) xdr_GETATTR3args;
_xdr_result = (xdrproc_t) xdr_GETATTR3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_getattr_3_svc;
break;
case NFSPROC3_SETATTR:
_xdr_argument = (xdrproc_t) xdr_SETATTR3args;
_xdr_result = (xdrproc_t) xdr_SETATTR3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_setattr_3_svc;
break;
case NFSPROC3_LOOKUP:
_xdr_argument = (xdrproc_t) xdr_LOOKUP3args;
_xdr_result = (xdrproc_t) xdr_LOOKUP3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_lookup_3_svc;
break;
case NFSPROC3_ACCESS:
_xdr_argument = (xdrproc_t) xdr_ACCESS3args;
_xdr_result = (xdrproc_t) xdr_ACCESS3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_access_3_svc;
break;
case NFSPROC3_READLINK:
_xdr_argument = (xdrproc_t) xdr_READLINK3args;
_xdr_result = (xdrproc_t) xdr_READLINK3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_readlink_3_svc;
break;
case NFSPROC3_READ:
_xdr_argument = (xdrproc_t) xdr_READ3args;
_xdr_result = (xdrproc_t) xdr_READ3res;
local = (char *(*)(char *, struct svc_req *)) nfsproc3_read_3_svc;
break;
case NFSPROC3_WRITE:
_xdr_argument = (xdrproc_t) xdr_WRITE3args;
_xdr_result = (xdrproc_t) xdr_WRITE3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_write_3_svc;
break;
case NFSPROC3_CREATE:
_xdr_argument = (xdrproc_t) xdr_CREATE3args;
_xdr_result = (xdrproc_t) xdr_CREATE3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_create_3_svc;
break;
case NFSPROC3_MKDIR:
_xdr_argument = (xdrproc_t) xdr_MKDIR3args;
_xdr_result = (xdrproc_t) xdr_MKDIR3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_mkdir_3_svc;
break;
case NFSPROC3_SYMLINK:
_xdr_argument = (xdrproc_t) xdr_SYMLINK3args;
_xdr_result = (xdrproc_t) xdr_SYMLINK3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_symlink_3_svc;
break;
case NFSPROC3_MKNOD:
_xdr_argument = (xdrproc_t) xdr_MKNOD3args;
_xdr_result = (xdrproc_t) xdr_MKNOD3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_mknod_3_svc;
break;
case NFSPROC3_REMOVE:
_xdr_argument = (xdrproc_t) xdr_REMOVE3args;
_xdr_result = (xdrproc_t) xdr_REMOVE3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_remove_3_svc;
break;
case NFSPROC3_RMDIR:
_xdr_argument = (xdrproc_t) xdr_RMDIR3args;
_xdr_result = (xdrproc_t) xdr_RMDIR3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_rmdir_3_svc;
break;
case NFSPROC3_RENAME:
_xdr_argument = (xdrproc_t) xdr_RENAME3args;
_xdr_result = (xdrproc_t) xdr_RENAME3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_rename_3_svc;
break;
case NFSPROC3_LINK:
_xdr_argument = (xdrproc_t) xdr_LINK3args;
_xdr_result = (xdrproc_t) xdr_LINK3res;
local = (char *(*)(char *, struct svc_req *)) nfsproc3_link_3_svc;
break;
case NFSPROC3_READDIR:
_xdr_argument = (xdrproc_t) xdr_READDIR3args;
_xdr_result = (xdrproc_t) xdr_READDIR3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_readdir_3_svc;
break;
case NFSPROC3_READDIRPLUS:
_xdr_argument = (xdrproc_t) xdr_READDIRPLUS3args;
_xdr_result = (xdrproc_t) xdr_READDIRPLUS3res;
local = (char *(*)(char *, struct svc_req *))
nfsproc3_readdirplus_3_svc;
break;
case NFSPROC3_FSSTAT:
_xdr_argument = (xdrproc_t) xdr_FSSTAT3args;
_xdr_result = (xdrproc_t) xdr_FSSTAT3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_fsstat_3_svc;
break;
case NFSPROC3_FSINFO:
_xdr_argument = (xdrproc_t) xdr_FSINFO3args;
_xdr_result = (xdrproc_t) xdr_FSINFO3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_fsinfo_3_svc;
break;
case NFSPROC3_PATHCONF:
_xdr_argument = (xdrproc_t) xdr_PATHCONF3args;
_xdr_result = (xdrproc_t) xdr_PATHCONF3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_pathconf_3_svc;
break;
case NFSPROC3_COMMIT:
_xdr_argument = (xdrproc_t) xdr_COMMIT3args;
_xdr_result = (xdrproc_t) xdr_COMMIT3res;
local =
(char *(*)(char *, struct svc_req *)) nfsproc3_commit_3_svc;
break;
default:
svcerr_noproc(transp);
return;
}
memset((char *) &argument, 0, sizeof(argument));
if (!svc_getargs(transp, (xdrproc_t) _xdr_argument, (caddr_t) & argument)) {
svcerr_decode(transp);
return;
}
result = (*local) ((char *) &argument, rqstp);
if (result != NULL &&
!svc_sendreply(transp, (xdrproc_t) _xdr_result, result)) {
svcerr_systemerr(transp);
logmsg(LOG_CRIT, "unable to send RPC reply");
}
if (!svc_freeargs
(transp, (xdrproc_t) _xdr_argument, (caddr_t) & argument)) {
logmsg(LOG_CRIT, "unable to free XDR arguments");
}
return;
}
/*
* mount protocol dispatcher
* generated by rpcgen
*/
static void mountprog_3(struct svc_req *rqstp, register SVCXPRT * transp)
{
union {
dirpath mountproc_mnt_3_arg;
dirpath mountproc_umnt_3_arg;
} argument;
char *result;
xdrproc_t _xdr_argument, _xdr_result;
char *(*local) (char *, struct svc_req *);
switch (rqstp->rq_proc) {
case MOUNTPROC_NULL:
_xdr_argument = (xdrproc_t) xdr_void;
_xdr_result = (xdrproc_t) xdr_void;
local =
(char *(*)(char *, struct svc_req *)) mountproc_null_3_svc;
break;
case MOUNTPROC_MNT:
_xdr_argument = (xdrproc_t) xdr_dirpath;
_xdr_result = (xdrproc_t) xdr_mountres3;
local = (char *(*)(char *, struct svc_req *)) mountproc_mnt_3_svc;
break;
case MOUNTPROC_DUMP:
_xdr_argument = (xdrproc_t) xdr_void;
_xdr_result = (xdrproc_t) xdr_mountlist;
local =
(char *(*)(char *, struct svc_req *)) mountproc_dump_3_svc;
break;
case MOUNTPROC_UMNT:
_xdr_argument = (xdrproc_t) xdr_dirpath;
_xdr_result = (xdrproc_t) xdr_void;
local =
(char *(*)(char *, struct svc_req *)) mountproc_umnt_3_svc;
break;
case MOUNTPROC_UMNTALL:
_xdr_argument = (xdrproc_t) xdr_void;
_xdr_result = (xdrproc_t) xdr_void;
local =
(char *(*)(char *, struct svc_req *)) mountproc_umntall_3_svc;
break;
case MOUNTPROC_EXPORT:
_xdr_argument = (xdrproc_t) xdr_void;
_xdr_result = (xdrproc_t) xdr_exports;
local =
(char *(*)(char *, struct svc_req *)) mountproc_export_3_svc;
break;
default:
svcerr_noproc(transp);
return;
}
memset((char *) &argument, 0, sizeof(argument));
if (!svc_getargs(transp, (xdrproc_t) _xdr_argument, (caddr_t) & argument)) {
svcerr_decode(transp);
return;
}
result = (*local) ((char *) &argument, rqstp);
if (result != NULL &&
!svc_sendreply(transp, (xdrproc_t) _xdr_result, result)) {
svcerr_systemerr(transp);
logmsg(LOG_CRIT, "unable to send RPC reply");
}
if (!svc_freeargs
(transp, (xdrproc_t) _xdr_argument, (caddr_t) & argument)) {
logmsg(LOG_CRIT, "unable to free XDR arguments");
}
return;
}
static void _register_service(SVCXPRT *transp,
const rpcprog_t prognum,
const char *progname,
const rpcvers_t versnum,
const char *versname,
void (*dispatch)(struct svc_req *, SVCXPRT *))
{
int type, domain;
socklen_t len;
const char *netid;
struct netconfig *nconf = NULL;
len = sizeof(type);
if (getsockopt(transp->xp_fd, SOL_SOCKET, SO_TYPE, &type, &len)) {
perror("getsockopt");
fprintf(stderr, "unable to register (%s, %s).\n",
progname, versname);
daemon_exit(0);
}
if (type == SOCK_STREAM)
netid = "tcp";
else
netid = "udp";
if (opt_portmapper) {
nconf = getnetconfigent(netid);
if (nconf == NULL) {
fprintf(stderr, "unable to get netconfig entry \"%s\"\n", netid);
daemon_exit(0);
}
}
if (!svc_reg(transp, prognum, versnum, dispatch, nconf)) {
fprintf(stderr, "unable to register (%s, %s, %s).\n",
progname, versname, netid);
daemon_exit(0);
}
if (opt_port_file != NULL) {
write_to_port_file(transp, prognum, versnum, type);
}
if (nconf != NULL)
freenetconfigent(nconf);
if (nconf == NULL)
return;
len = sizeof(domain);
if (getsockopt(transp->xp_fd, SOL_SOCKET, SO_DOMAIN, &domain, &len)) {
perror("getsockopt");
fprintf(stderr, "unable to register (%s, %s).\n",
progname, versname);
daemon_exit(0);
}
if (domain != PF_INET6)
return;
if (type == SOCK_STREAM)
netid = "tcp6";
else
netid = "udp6";
nconf = getnetconfigent(netid);
if (nconf == NULL) {
fprintf(stderr, "unable to get netconfig entry \"%s\"\n", netid);
daemon_exit(0);
}
if (!svc_reg(transp, prognum, versnum, dispatch, nconf)) {
fprintf(stderr, "unable to register (%s, %s, %s).\n",
progname, versname, netid);
daemon_exit(0);
}
if (nconf != NULL)
freenetconfigent(nconf);
}
#define register_service(t, p, v, d) \
_register_service(t, p, #p, v, #v, d)
static void register_nfs_service(SVCXPRT * udptransp, SVCXPRT * tcptransp)
{
if (opt_portmapper) {
svc_unreg(NFS3_PROGRAM, NFS_V3);
}
if (udptransp != NULL) {
/* Register NFS service for UDP */
register_service(udptransp, NFS3_PROGRAM, NFS_V3, nfs3_program_3);
}
if (tcptransp != NULL) {
/* Register NFS service for TCP */
register_service(tcptransp, NFS3_PROGRAM, NFS_V3, nfs3_program_3);
}
}
static void register_mount_service(SVCXPRT * udptransp, SVCXPRT * tcptransp)
{
if (opt_portmapper) {
svc_unreg(MOUNTPROG, MOUNTVERS1);
svc_unreg(MOUNTPROG, MOUNTVERS3);
}
if (udptransp != NULL) {
/* Register MOUNT service (v1) for UDP */
register_service(udptransp, MOUNTPROG, MOUNTVERS1, mountprog_3);
/* Register MOUNT service (v3) for UDP */
register_service(udptransp, MOUNTPROG, MOUNTVERS3, mountprog_3);
}
if (tcptransp != NULL) {
/* Register MOUNT service (v1) for TCP */
register_service(tcptransp, MOUNTPROG, MOUNTVERS1, mountprog_3);
/* Register MOUNT service (v3) for TCP */
register_service(tcptransp, MOUNTPROG, MOUNTVERS3, mountprog_3);
}
}
static SVCXPRT *create_udp_transport(unsigned int port)
{
SVCXPRT *transp = NULL;
int sock;
sock = socket(PF_INET6, SOCK_DGRAM, 0);
if ((sock == -1) && (errno == EAFNOSUPPORT))
sock = socket(PF_INET, SOCK_DGRAM, 0);
if (sock == -1) {
perror("socket");
fprintf(stderr, "Couldn't create a listening udp socket\n");
exit(1);
}
int domain;
socklen_t len;
const int on = 1;
const struct sockaddr *sin;
size_t sin_len;
struct sockaddr_in sin4;
struct sockaddr_in6 sin6;
len = sizeof(domain);
if (getsockopt(sock, SOL_SOCKET, SO_DOMAIN, &domain, &len)) {
perror("getsockopt");
fprintf(stderr, "Couldn't create a listening udp socket\n");
exit(1);
}
if (domain == PF_INET6) {
/* Make sure we null the entire sockaddr_in6 structure */
memset(&sin6, 0, sizeof(struct sockaddr_in6));
sin6.sin6_family = AF_INET6;
sin6.sin6_port = htons(port);
sin6.sin6_addr = opt_bind_addr;
sin = (const struct sockaddr*)&sin6;
sin_len = sizeof(sin6);
} else {
/* Make sure we null the entire sockaddr_in structure */
memset(&sin4, 0, sizeof(struct sockaddr_in));
sin4.sin_family = AF_INET;
sin4.sin_port = htons(port);
if (IN6_IS_ADDR_UNSPECIFIED(&opt_bind_addr)) {
sin4.sin_addr.s_addr = INADDR_ANY;
} else if (IN6_IS_ADDR_V4MAPPED(&opt_bind_addr) ||
IN6_IS_ADDR_V4COMPAT(&opt_bind_addr)) {
sin4.sin_addr.s_addr = ((uint32_t*)&opt_bind_addr)[3];
} else {
fprintf(stderr, "Invalid bind address specified\n");
exit(1);
}
sin = (const struct sockaddr*)&sin4;
sin_len = sizeof(sin4);
}
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char *) &on, sizeof(on));
if (bind(sock, sin, sin_len)) {
perror("bind");
fprintf(stderr, "Couldn't bind to udp port %d\n", port);
exit(1);
}
transp = svc_dg_create(sock, 0, 0);
if (transp == NULL) {
fprintf(stderr, "%s\n", "cannot create udp service.");
daemon_exit(0);
}
return transp;
}
static SVCXPRT *create_tcp_transport(unsigned int port)
{
SVCXPRT *transp = NULL;
int sock;
sock = socket(PF_INET6, SOCK_STREAM, 0);
if ((sock == -1) && (errno == EAFNOSUPPORT))
sock = socket(PF_INET, SOCK_STREAM, 0);
if (sock == -1) {
perror("socket");
fprintf(stderr, "Couldn't create a listening tcp socket\n");
exit(1);
}
int domain;
socklen_t len;
const int on = 1;
const struct sockaddr *sin;
size_t sin_len;
struct sockaddr_in sin4;
struct sockaddr_in6 sin6;
len = sizeof(domain);
if (getsockopt(sock, SOL_SOCKET, SO_DOMAIN, &domain, &len)) {
perror("getsockopt");
fprintf(stderr, "Couldn't create a listening tcp socket\n");
exit(1);
}
if (domain == PF_INET6) {
/* Make sure we null the entire sockaddr_in6 structure */