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Add -P <port> option to allow binding to a specific port.

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PR:		bin/109494
Submitted by:	mtm
MFC after:	1 week
This commit is contained in:
Matteo Riondato 2008-02-03 17:39:37 +00:00
parent 031ea52f84
commit 3868f70efe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=175951
2 changed files with 61 additions and 3 deletions
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58
usr.sbin/ypserv/yp_main.c
View File

@ -84,6 +84,16 @@ char *yp_dir = _PATH_YP;
int do_dns = 0;
int resfd;
struct socktype {
const char *st_name;
int st_type;
};
static struct socktype stlist[] = {
{ "tcp", SOCK_STREAM },
{ "udp", SOCK_DGRAM },
{ NULL, 0 }
};
static
void _msgout(char* msg)
{
@ -187,7 +197,7 @@ reaper(int sig)
static void
usage(void)
{
fprintf(stderr, "usage: ypserv [-h] [-d] [-n] [-p path]\n");
fprintf(stderr, "usage: ypserv [-h] [-d] [-n] [-p path] [-P port]\n");
exit(1);
}
@ -230,8 +240,11 @@ main(int argc, char *argv[])
struct sockaddr_in saddr;
socklen_t asize = sizeof (saddr);
int ch;
in_port_t yp_port = 0;
char *errstr;
struct socktype *st;
while ((ch = getopt(argc, argv, "hdnp:")) != -1) {
while ((ch = getopt(argc, argv, "hdnp:P:")) != -1) {
switch (ch) {
case 'd':
debug = ypdb_debug = 1;
@ -242,6 +255,14 @@ main(int argc, char *argv[])
case 'p':
yp_dir = optarg;
break;
case 'P':
yp_port = (in_port_t)strtonum(optarg, 1, 65535,
(const char **)&errstr);
if (yp_port == 0 && errstr != NULL) {
_msgout("invalid port number provided");
exit(1);
}
break;
case 'h':
default:
usage();
@ -277,6 +298,39 @@ main(int argc, char *argv[])
(void) pmap_unset(YPPROG, 1);
}
/*
* Initialize TCP/UDP sockets.
*/
memset((char *)&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
saddr.sin_port = htons(yp_port);
for (st = stlist; st->st_name != NULL; st++) {
/* Do not bind the socket if the user didn't specify a port */
if (yp_port == 0)
break;
sock = socket(AF_INET, st->st_type, 0);
if (sock == -1) {
if ((asprintf(&errstr, "cannot create a %s socket",
st->st_name)) == -1)
err(1, "unexpected failure in asprintf()");
_msgout(errstr);
free((void *)errstr);
exit(1);
}
if (bind(sock, (struct sockaddr *) &saddr, sizeof(saddr))
== -1) {
if ((asprintf(&errstr, "cannot bind %s socket",
st->st_name)) == -1)
err(1, "unexpected failure in asprintf()");
_msgout(errstr);
free((void *)errstr);
exit(1);
}
errstr = NULL;
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
transp = svcudp_create(sock);
if (transp == NULL) {

6
usr.sbin/ypserv/ypserv.8
View File

@ -30,7 +30,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd February 4, 1995
.Dd February 3, 2008
.Dt YPSERV 8
.Os
.Sh NAME
@ -40,6 +40,7 @@
.Nm
.Op Fl n
.Op Fl d
.Op Fl P Ar port
.Op Fl p Ar path
.Sh DESCRIPTION
.Tn NIS
@ -403,6 +404,9 @@ in subprocesses, allowing the parent server process to go on handling
other requests.)
This makes it easier to trace the server with
a debugging tool.
.It Fl P Ar port
Force ypserv to bind to a specific TCP/UDP port, rather than selecting
its own.
.It Fl p Ar path
Normally,
.Nm