139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/* $NetBSD: pt_tcp.c,v 1.20 2007/07/02 18:07:45 pooka Exp $ */
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/*
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Id: pt_tcp.c,v 1.1 1992/05/25 21:43:09 jsp Exp
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* @(#)pt_tcp.c 8.5 (Berkeley) 4/28/95
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: pt_tcp.c,v 1.20 2007/07/02 18:07:45 pooka Exp $");
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#endif /* not lint */
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/syslog.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include "portald.h"
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/*
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* Key will be tcp/host/port[/"priv"]
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* Create a TCP socket connected to the
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* requested host and port.
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* Some trailing suffix values have special meanings.
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* An unrecognised suffix is an error.
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*/
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int
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portal_tcp(struct portal_cred *pcr, char *key, char **v, int *fdp)
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{
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char host[MAXHOSTNAMELEN];
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char port[MAXHOSTNAMELEN];
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char *p = key + (v[1] ? strlen(v[1]) : 0);
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char *q;
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int priv = 0;
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struct addrinfo hints, *res, *lres;
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int so = -1;
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const char *cause = "unknown";
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q = strchr(p, '/');
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if (q == 0 || q - p >= sizeof(host))
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return (EINVAL);
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*q = '\0';
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if (strlcpy(host, p, sizeof(host)) >= sizeof(host))
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return (EINVAL);
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p = q + 1;
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q = strchr(p, '/');
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if (q)
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*q = '\0';
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if (strlcpy(port, p, sizeof(port)) >= sizeof(port))
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return (EINVAL);
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if (q) {
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p = q + 1;
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if (strcmp(p, "priv") == 0) {
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if (pcr->pcr_uid == 0)
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priv = 1;
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else
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return (EPERM);
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} else {
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return (EINVAL);
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}
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}
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = 0;
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if (getaddrinfo(host, port, &hints, &res) != 0)
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return(EINVAL);
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for (lres = res; lres; lres = lres->ai_next) {
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if (priv)
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so = rresvport((int *) 0);
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else
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so = socket(lres->ai_family, lres->ai_socktype,
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lres->ai_protocol);
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if (so < 0) {
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cause = "socket";
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continue;
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}
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if (connect(so, lres->ai_addr, lres->ai_addrlen) != 0) {
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cause = "connect";
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(void)close(so);
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so = -1;
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continue;
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}
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*fdp = so;
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errno = 0;
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break;
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}
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if (so < 0)
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syslog(LOG_WARNING, "%s: %m", cause);
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freeaddrinfo(res);
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return (errno);
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}
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