149 lines
3.9 KiB
C
149 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
RCSID("$Id: mini_inetd.c,v 1.30 2002/02/18 19:08:55 joda Exp $");
|
|
#endif
|
|
|
|
#include <err.h>
|
|
#include "roken.h"
|
|
|
|
/*
|
|
* accept a connection on `s' and pretend it's served by inetd.
|
|
*/
|
|
|
|
static void
|
|
accept_it (int s)
|
|
{
|
|
int s2;
|
|
|
|
s2 = accept(s, NULL, NULL);
|
|
if(s2 < 0)
|
|
err (1, "accept");
|
|
close(s);
|
|
dup2(s2, STDIN_FILENO);
|
|
dup2(s2, STDOUT_FILENO);
|
|
/* dup2(s2, STDERR_FILENO); */
|
|
close(s2);
|
|
}
|
|
|
|
/*
|
|
* Listen on a specified port, emulating inetd.
|
|
*/
|
|
|
|
void
|
|
mini_inetd_addrinfo (struct addrinfo *ai)
|
|
{
|
|
int ret;
|
|
struct addrinfo *a;
|
|
int n, nalloc, i;
|
|
int *fds;
|
|
fd_set orig_read_set, read_set;
|
|
int max_fd = -1;
|
|
|
|
for (nalloc = 0, a = ai; a != NULL; a = a->ai_next)
|
|
++nalloc;
|
|
|
|
fds = malloc (nalloc * sizeof(*fds));
|
|
if (fds == NULL)
|
|
errx (1, "mini_inetd: out of memory");
|
|
|
|
FD_ZERO(&orig_read_set);
|
|
|
|
for (i = 0, a = ai; a != NULL; a = a->ai_next) {
|
|
fds[i] = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
|
|
if (fds[i] < 0) {
|
|
warn ("socket af = %d", a->ai_family);
|
|
continue;
|
|
}
|
|
socket_set_reuseaddr (fds[i], 1);
|
|
if (bind (fds[i], a->ai_addr, a->ai_addrlen) < 0) {
|
|
warn ("bind af = %d", a->ai_family);
|
|
close(fds[i]);
|
|
continue;
|
|
}
|
|
if (listen (fds[i], SOMAXCONN) < 0) {
|
|
warn ("listen af = %d", a->ai_family);
|
|
close(fds[i]);
|
|
continue;
|
|
}
|
|
if (fds[i] >= FD_SETSIZE)
|
|
errx (1, "fd too large");
|
|
FD_SET(fds[i], &orig_read_set);
|
|
max_fd = max(max_fd, fds[i]);
|
|
++i;
|
|
}
|
|
if (i == 0)
|
|
errx (1, "no sockets");
|
|
n = i;
|
|
|
|
do {
|
|
read_set = orig_read_set;
|
|
|
|
ret = select (max_fd + 1, &read_set, NULL, NULL, NULL);
|
|
if (ret < 0 && errno != EINTR)
|
|
err (1, "select");
|
|
} while (ret <= 0);
|
|
|
|
for (i = 0; i < n; ++i)
|
|
if (FD_ISSET (fds[i], &read_set)) {
|
|
accept_it (fds[i]);
|
|
return;
|
|
}
|
|
abort ();
|
|
}
|
|
|
|
void
|
|
mini_inetd (int port)
|
|
{
|
|
int error;
|
|
struct addrinfo *ai, hints;
|
|
char portstr[NI_MAXSERV];
|
|
|
|
memset (&hints, 0, sizeof(hints));
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_family = PF_UNSPEC;
|
|
|
|
snprintf (portstr, sizeof(portstr), "%d", ntohs(port));
|
|
|
|
error = getaddrinfo (NULL, portstr, &hints, &ai);
|
|
if (error)
|
|
errx (1, "getaddrinfo: %s", gai_strerror (error));
|
|
|
|
mini_inetd_addrinfo(ai);
|
|
|
|
freeaddrinfo(ai);
|
|
}
|