diff options
Diffstat (limited to 'usr.sbin/mount_portalfs/pt_tcplisten.c')
| -rw-r--r-- | usr.sbin/mount_portalfs/pt_tcplisten.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/usr.sbin/mount_portalfs/pt_tcplisten.c b/usr.sbin/mount_portalfs/pt_tcplisten.c new file mode 100644 index 0000000..3bd29c1 --- /dev/null +++ b/usr.sbin/mount_portalfs/pt_tcplisten.c @@ -0,0 +1,201 @@ +/* + * Copyright (c) 1992, 1993 + * 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. + * + * Modified by Duncan Barclay. + * + * 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. + * 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. + * + * @(#)pt_tcp.c 8.3 (Berkeley) 3/27/94 + * + * pt_tcp.c,v 1.1.1.1 1994/05/26 06:34:34 rgrimes Exp + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#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 tcplisten/host/port + * + * Create a TCP socket bound to the requested host and port. + * If the host is "ANY" the receiving address will be set to INADDR_ANY. + * If the port is 0 the caller must find out the returned port number + * using a call to getsockname. + * + * XXX! The owner of the socket will be root rather then the user. This + * may cause remote auth (identd) to return unexpected results. + * + */ +int portal_tcplisten(struct portal_cred *pcr, char *key, char **v, + int kso __unused, 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 = NULL; + struct in_addr *ip[2]; + struct in_addr ina; + u_short s_port; + int any = 0; + struct sockaddr_in sain; + + q = strchr(p, '/'); + if (q == 0 || q - p >= (int)sizeof(host)) + return (EINVAL); + *q = '\0'; + snprintf(host, sizeof(host), "%s", p); + p = q + 1; + + q = strchr(p, '/'); + if (q) + *q = '\0'; + if (strlen(p) >= sizeof(port)) + return (EINVAL); + snprintf(port, sizeof(port), "%s", p); + + if (strcmp(host, "ANY") == 0) { + any = 1; + } else { + hp = gethostbyname(host); + if (hp != 0) { + ipp = (struct in_addr **) hp->h_addr_list; + } else { + ina.s_addr = inet_addr(host); + if (ina.s_addr == INADDR_NONE) + return (EINVAL); + ip[0] = &ina; + ip[1] = 0; + ipp = ip; + } + } +#ifdef DEBUG + if (any) + printf("INADDR_ANY to be used for hostname\n"); + else + printf("inet address for %s is %s\n", host, inet_ntoa(*ipp[0])); +#endif + + sp = getservbyname(port, "tcp"); + if (sp != NULL) { + s_port = (u_short) sp->s_port; + } else { + s_port = strtoul(port, &p, 0); + if (*p != '\0') + return (EINVAL); + s_port = htons(s_port); + } + if ((ntohs(s_port) != 0) && + (ntohs(s_port) <= IPPORT_RESERVED) && + (pcr->pcr_uid != 0)) + return (EPERM); +#ifdef DEBUG + printf("port number for %s is %d\n", port, ntohs(s_port)); +#endif + + memset(&sain, 0, sizeof(sain)); + sain.sin_len = sizeof(sain); + sain.sin_family = AF_INET; + sain.sin_port = s_port; + + if (any) { + int so; + int sock; + + so = socket(AF_INET, SOCK_STREAM, 0); + if (so < 0) { + syslog(LOG_ERR, "socket: %m"); + return (errno); + } + + sain.sin_addr.s_addr = INADDR_ANY; + if (bind(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) { + listen(so, 1); + if ((sock = accept(so, (struct sockaddr *)0, (int *)0)) == -1) { + syslog(LOG_ERR, "accept: %m"); + (void) close(so); + return (errno); + } + *fdp = sock; + (void) close(so); + return (0); + } + syslog(LOG_ERR, "bind: %m"); + (void) close(so); + return (errno); + } + + while (ipp[0]) { + int so; + int sock; + + so = socket(AF_INET, SOCK_STREAM, 0); + if (so < 0) { + syslog(LOG_ERR, "socket: %m"); + return (errno); + } + + sain.sin_addr = *ipp[0]; + if (bind(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) { + listen(so, 1); + if ((sock = accept(so, (struct sockaddr *)0, (int *)0)) == -1) { + syslog(LOG_ERR, "accept: %m"); + (void) close(so); + return (errno); + } + *fdp = sock; + (void) close(so); + return (0); + } + (void) close(so); + + ipp++; + } + + syslog(LOG_ERR, "bind: %m"); + return (errno); + +} |
