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/* $OpenBSD: pt_tcp.c,v 1.6 2003/03/11 02:32:29 deraadt Exp $ */
/* $NetBSD: pt_tcp.c,v 1.9 1995/05/21 15:33:22 mycroft Exp $ */
/*
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 <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(pcr, key, v, kso, fdp)
struct portal_cred *pcr;
char *key;
char **v;
int kso;
int *fdp;
{
char host[MAXHOSTNAMELEN];
char port[MAXHOSTNAMELEN];
char *p = key + (v[1] ? strlen(v[1]) : 0);
char *q;
struct hostent *hp;
struct servent *sp;
struct in_addr **ipp;
struct in_addr *ip[2];
struct in_addr ina;
int s_port;
int priv = 0;
struct sockaddr_in sain;
q = strchr(p, '/');
if (q == 0 || q - p >= sizeof(host))
return (EINVAL);
*q = '\0';
(void)strlcpy(host, p, sizeof(host));
p = q + 1;
q = strchr(p, '/');
if (q)
*q = '\0';
if (strlen(p) >= sizeof(port))
return (EINVAL);
(void)strlcpy(port, p, sizeof(port));
if (q) {
p = q + 1;
if (strcmp(p, "priv") == 0) {
if (pcr->pcr_uid == 0)
priv = 1;
else
return (EPERM);
} else {
return (EINVAL);
}
}
if (inet_aton(host, &ina) == 0) {
hp = gethostbyname(host);
if (hp == 0)
return (EINVAL);
ipp = (struct in_addr **)hp->h_addr_list;
} else {
ip[0] = &ina;
ip[1] = 0;
ipp = ip;
}
sp = getservbyname(port, "tcp");
if (sp != 0)
s_port = sp->s_port;
else {
s_port = strtoul(port, &p, 0);
if (s_port == 0 || *p != '\0')
return (EINVAL);
s_port = htons(s_port);
}
(void)memset(&sain, 0, sizeof(sain));
sain.sin_len = sizeof(sain);
sain.sin_family = AF_INET;
sain.sin_port = s_port;
while (ipp[0]) {
int so;
if (priv)
so = rresvport(NULL);
else
so = socket(AF_INET, SOCK_STREAM, 0);
if (so < 0) {
syslog(LOG_ERR, "socket: %m");
return (errno);
}
sain.sin_addr = *ipp[0];
if (connect(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) {
*fdp = so;
return (0);
}
(void)close(so);
ipp++;
}
return (errno);
}
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