a16800d862
PR: kern/8793, misc/8796, kern/8797, kern/8798, kern/8050, kern/6758 Submitted by: Duncan Barclay <dmlb@ragnet.demon.co.uk>
207 lines
6.8 KiB
C
207 lines
6.8 KiB
C
/*
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* Copyright (c) 1992, 1993
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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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* Modified by Duncan Barclay.
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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 8.3 (Berkeley) 3/27/94
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*
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* pt_tcp.c,v 1.1.1.1 1994/05/26 06:34:34 rgrimes Exp
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*/
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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 <strings.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 tcplisten/host/port
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*
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* Create a TCP socket bound to the requested host and port.
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* If the host is "ANY" the receving address will be set to INADDR_ANY.
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* If the port is 0 the caller must find out the returned port number
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* using a call to getsockname.
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*
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* XXX! The owner of the socket will be root rather then the user. This
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* may cause remote auth (identd) to return unexpected results.
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*
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*/
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int portal_tcplisten(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 any = 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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snprintf(host, sizeof(host), "%s", 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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snprintf(port, sizeof(port), "%s", p);
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if (strcmp(host, "ANY") == 0) {
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any = 1;
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} else {
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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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}
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#ifdef DEBUG
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if (any)
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printf("INADDR_ANY to be used for hostname\n");
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else
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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 (*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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if ((ntohs(s_port) != 0) &&
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(ntohs(s_port) <= IPPORT_RESERVED) &&
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(pcr->pcr_uid != 0))
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return (EPERM);
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#ifdef DEBUG
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printf("port number for %s is %d\n", port, 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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if (any) {
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int so;
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int sock;
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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.s_addr = INADDR_ANY;
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if (bind(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) {
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listen(so, 1);
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if ((sock = accept(so, (struct sockaddr *)0, (int *)0)) == -1) {
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syslog(LOG_ERR, "accept: %m");
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(void) close(so);
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return (errno);
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}
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*fdp = sock;
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(void) close(so);
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return (0);
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}
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syslog(LOG_ERR, "bind: %m");
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(void) close(so);
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return (errno);
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}
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while (ipp[0]) {
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int so;
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int sock;
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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 (bind(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) {
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listen(so, 1);
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if ((sock = accept(so, (struct sockaddr *)0, (int *)0)) == -1) {
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syslog(LOG_ERR, "accept: %m");
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(void) close(so);
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return (errno);
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}
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*fdp = sock;
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(void) close(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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syslog(LOG_ERR, "bind: %m");
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return (errno);
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}
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