168 lines
4.3 KiB
C
168 lines
4.3 KiB
C
/*
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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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* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* @(#)pt_tcp.c 8.5 (Berkeley) 4/28/95
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <errno.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <unistd.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 unrecognized suffix is an error.
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*/
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int portal_tcp(pcr, key, v, kso, fdp)
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struct portal_cred *pcr;
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char *key;
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char **v;
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int kso;
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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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struct hostent *hp;
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struct servent *sp;
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struct in_addr **ipp;
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struct in_addr *ip[2];
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struct in_addr ina;
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u_short s_port;
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int priv = 0;
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struct sockaddr_in sain;
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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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strcpy(host, p);
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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 (strlen(p) >= sizeof(port))
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return (EINVAL);
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strcpy(port, p);
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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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hp = gethostbyname(host);
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if (hp != 0) {
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ipp = (struct in_addr **) hp->h_addr_list;
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} else {
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ina.s_addr = inet_addr(host);
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if (ina.s_addr == INADDR_NONE)
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return (EINVAL);
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ip[0] = &ina;
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ip[1] = 0;
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ipp = ip;
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}
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#ifdef DEBUG
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printf ("inet address for %s is %s\n", host, inet_ntoa(*ipp[0]));
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#endif
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sp = getservbyname(port, "tcp");
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if (sp != NULL) {
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s_port = (u_short)sp->s_port;
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} else {
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s_port = strtoul(port, &p, 0);
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if (s_port == 0 || *p != '\0')
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return (EINVAL);
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s_port = htons(s_port);
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}
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#ifdef DEBUG
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printf ("port number for %s is %d\n", port, (int)ntohs(s_port));
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#endif
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memset(&sain, 0, sizeof(sain));
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sain.sin_len = sizeof(sain);
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sain.sin_family = AF_INET;
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sain.sin_port = s_port;
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while (ipp[0]) {
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int so;
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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(AF_INET, SOCK_STREAM, 0);
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if (so < 0) {
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syslog(LOG_ERR, "socket: %m");
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return (errno);
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}
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sain.sin_addr = *ipp[0];
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if (connect(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) {
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*fdp = so;
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return (0);
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}
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(void) close(so);
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ipp++;
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}
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return (errno);
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}
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