139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/* $NetBSD: pt_tcp.c,v 1.21 2009/04/11 07:36:43 lukem Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1992, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software donated to Berkeley by
|
|
* Jan-Simon Pendry.
|
|
*
|
|
* 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 University 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 REGENTS 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 REGENTS 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.
|
|
*
|
|
* from: Id: pt_tcp.c,v 1.1 1992/05/25 21:43:09 jsp Exp
|
|
* @(#)pt_tcp.c 8.5 (Berkeley) 4/28/95
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__RCSID("$NetBSD: pt_tcp.c,v 1.21 2009/04/11 07:36:43 lukem Exp $");
|
|
#endif /* not lint */
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
|
|
#include "portald.h"
|
|
|
|
/*
|
|
* Key will be tcp/host/port[/"priv"]
|
|
* Create a TCP socket connected to the
|
|
* requested host and port.
|
|
* Some trailing suffix values have special meanings.
|
|
* An unrecognised suffix is an error.
|
|
*/
|
|
int
|
|
portal_tcp(struct portal_cred *pcr, char *key, char **v, int *fdp)
|
|
{
|
|
char host[MAXHOSTNAMELEN];
|
|
char port[MAXHOSTNAMELEN];
|
|
char *p = key + (v[1] ? strlen(v[1]) : 0);
|
|
char *q;
|
|
int priv = 0;
|
|
struct addrinfo hints, *res, *lres;
|
|
int so = -1;
|
|
const char *cause = "unknown";
|
|
|
|
q = strchr(p, '/');
|
|
if (q == 0 || (size_t)(q - p) >= sizeof(host))
|
|
return (EINVAL);
|
|
*q = '\0';
|
|
if (strlcpy(host, p, sizeof(host)) >= sizeof(host))
|
|
return (EINVAL);
|
|
p = q + 1;
|
|
|
|
q = strchr(p, '/');
|
|
if (q)
|
|
*q = '\0';
|
|
if (strlcpy(port, p, sizeof(port)) >= sizeof(port))
|
|
return (EINVAL);
|
|
if (q) {
|
|
p = q + 1;
|
|
if (strcmp(p, "priv") == 0) {
|
|
if (pcr->pcr_uid == 0)
|
|
priv = 1;
|
|
else
|
|
return (EPERM);
|
|
} else {
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
if (getaddrinfo(host, port, &hints, &res) != 0)
|
|
return(EINVAL);
|
|
|
|
for (lres = res; lres; lres = lres->ai_next) {
|
|
if (priv)
|
|
so = rresvport((int *) 0);
|
|
else
|
|
so = socket(lres->ai_family, lres->ai_socktype,
|
|
lres->ai_protocol);
|
|
if (so < 0) {
|
|
cause = "socket";
|
|
continue;
|
|
}
|
|
|
|
if (connect(so, lres->ai_addr, lres->ai_addrlen) != 0) {
|
|
cause = "connect";
|
|
(void)close(so);
|
|
so = -1;
|
|
continue;
|
|
}
|
|
|
|
*fdp = so;
|
|
errno = 0;
|
|
break;
|
|
}
|
|
|
|
if (so < 0)
|
|
syslog(LOG_WARNING, "%s: %m", cause);
|
|
|
|
freeaddrinfo(res);
|
|
|
|
return (errno);
|
|
}
|