method_uname.c
上传用户:zm130024
上传日期:2007-01-04
资源大小:432k
文件大小:4k
- /*
- * Copyright (c) 1997, 1998, 1999
- * Inferno Nettverk A/S, Norway. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. The above copyright notice, this list of conditions and the following
- * disclaimer must appear in all copies of the software, derivative works
- * or modified versions, and any portions thereof, aswell as in all
- * supporting documentation.
- * 2. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by
- * Inferno Nettverk A/S, Norway.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
- *
- * Inferno Nettverk A/S requests users of this software to return to
- *
- * Software Distribution Coordinator or sdc@inet.no
- * Inferno Nettverk A/S
- * Oslo Research Park
- * Gaustadal閑n 21
- * N-0349 Oslo
- * Norway
- *
- * any improvements or extensions that they make and grant Inferno Nettverk A/S
- * the rights to redistribute these changes.
- *
- */
- #include "common.h"
- static const char rcsid[] =
- "$Id: method_uname.c,v 1.26 1999/05/25 17:22:32 michaels Exp $";
- int
- clientmethod_uname(s, host, version)
- int s;
- const struct sockshost_t *host;
- int version;
- {
- const char *function = "clientmethod_uname()";
- static struct uname_t uname; /* cached userinfo. */
- static struct sockshost_t unamehost; /* host cache was gotten for. */
- static int unameisok; /* cached data is ok? */
- char *offset, *name, *password;
- char request[ 1 /* version. */
- + 1 /* username length. */
- + MAXNAMELEN /* username. */
- + 1 /* password length. */
- + MAXPWLEN /* password. */
- ];
- char response[ 1 /* version. */
- + 1 /* status. */
- ];
- if (memcmp(&unamehost, host, sizeof(unamehost)) != 0)
- unameisok = 0; /* not same host as cache was gotten for. */
- switch (version) {
- case SOCKS_V5:
- break;
- default:
- SERRX(version);
- }
- /* fill in request. */
- offset = request;
- *offset++ = (char)SOCKS_UNAMEVERSION;
- if (!unameisok) {
- if ((name = socks_getusername(host, offset + 1, MAXNAMELEN)) == NULL) {
- swarnx("%s: could not determine username of client", function);
- return -1;
- }
- SASSERTX(strlen(name) < sizeof(uname.name));
- strcpy(uname.name, name);
- }
- else {
- name = uname.name;
- strcpy(offset + 1, name);
- }
- /* first byte gives length. */
- *offset = (char)strlen(name);
- OCTETIFY(*offset);
- offset += *offset + 1;
- if (!unameisok) {
- if ((password = socks_getpassword(host, name, offset + 1, MAXPWLEN))
- == NULL) {
- swarnx("%s: could not determine password of client", function);
- return -1;
- }
- SASSERTX(strlen(password) < sizeof(uname.password));
- strcpy(uname.password, password);
- }
- else {
- password = uname.password;
- strcpy(offset + 1, password);
- }
- /* first byte gives length. */
- *offset = (char)strlen(password);
- OCTETIFY(*offset);
- offset += *offset + 1;
- if (writen(s, request, (size_t)(offset - request)) != offset - request) {
- swarn("%s: writen()", function);
- return -1;
- }
- if (readn(s, response, sizeof(response)) != sizeof(response)) {
- swarn("%s: readn()", function);
- return -1;
- }
- if (request[UNAME_VERSION] != response[UNAME_VERSION]) {
- swarnx("%s: sent v%d, got v%d",
- function, request[UNAME_VERSION], response[UNAME_VERSION]);
- return -1;
- }
- if (response[UNAME_STATUS] == 0) { /* server accepted. */
- unamehost = *host;
- unameisok = 1;
- }
- return response[UNAME_STATUS];
- }