164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
/* $NetBSD: scaffold.c,v 1.12 2018/01/23 21:06:26 sevan Exp $ */
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/*
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* Routines for testing only. Not really industrial strength.
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*
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* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccs_id[] = "@(#) scaffold.c 1.6 97/03/21 19:27:24";
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#else
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__RCSID("$NetBSD: scaffold.c,v 1.12 2018/01/23 21:06:26 sevan Exp $");
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#endif
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#endif
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/* System libraries. */
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#include <sys/types.h>
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#include <sys/stat.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 <stdio.h>
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#include <syslog.h>
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#include <setjmp.h>
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#include <string.h>
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#include <stdlib.h>
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#ifndef INADDR_NONE
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#define INADDR_NONE (-1) /* XXX should be 0xffffffff */
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#endif
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/* Application-specific. */
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#include "tcpd.h"
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#include "scaffold.h"
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/*
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* These are referenced by the options module and by rfc931.c.
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*/
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int allow_severity = SEVERITY;
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int deny_severity = LOG_WARNING;
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extern int rfc931_timeout; /* = RFC931_TIMEOUT; */
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/* find_inet_addr - find all addresses for this host, result to free() */
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struct addrinfo *find_inet_addr(char *host, int flags)
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{
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struct addrinfo hints, *res;
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int error;
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memset(&hints, 0, sizeof(hints));
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_flags = AI_CANONNAME | flags;
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error = getaddrinfo(host, "0", &hints, &res);
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if (error) {
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tcpd_warn("%s: %s", host, gai_strerror(error));
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return (0);
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}
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if (res->ai_canonname && STR_NE(host, res->ai_canonname)) {
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tcpd_warn("%s: hostname alias", host);
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tcpd_warn("(official name: %.*s)", STRING_LENGTH, res->ai_canonname);
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}
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return (res);
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}
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/* check_dns - give each address thorough workout, return address count */
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int check_dns(char *host)
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{
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struct request_info request;
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struct sockaddr_storage ss;
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struct addrinfo *res0, *res;
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int count;
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if ((res0 = find_inet_addr(host, 0)) == NULL)
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return (0);
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memset(&ss, 0, sizeof(ss));
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request_init(&request, RQ_CLIENT_SIN, &ss, 0);
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sock_methods(&request);
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count = 0;
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for (res = res0; res; res = res->ai_next) {
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count++;
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if (res->ai_addrlen > sizeof(ss))
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continue;
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memcpy(&ss, res->ai_addr, res->ai_addrlen);
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/*
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* Force host name and address conversions. Use the request structure
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* as a cache. Detect hostname lookup problems. Any name/name or
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* name/address conflicts will be reported while eval_hostname() does
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* its job.
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*/
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request_set(&request, RQ_CLIENT_ADDR, "", RQ_CLIENT_NAME, "", 0);
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if (STR_EQ(eval_hostname(request.client), unknown))
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tcpd_warn("host address %s->name lookup failed",
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eval_hostaddr(request.client));
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}
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freeaddrinfo(res0);
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return (count);
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}
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/* dummy function to intercept the real shell_cmd() */
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/* ARGSUSED */
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void shell_cmd(char *command)
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{
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if (hosts_access_verbose)
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printf("command: %s", command);
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}
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/* dummy function to intercept the real clean_exit() */
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/* ARGSUSED */
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void clean_exit(struct request_info *request)
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{
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exit(0);
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}
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#if 0
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/* dummy function to intercept the real rfc931() */
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/* ARGSUSED */
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void
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rfc931(struct request_info *request)
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{
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strlcpy(request->user, unknown, sizeof(request->user));
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}
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#endif
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/* check_path - examine accessibility */
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int
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check_path(const char *path, struct stat *st)
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{
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struct stat stbuf;
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char buf[BUFSIZ];
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if (stat(path, st) < 0)
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return (-1);
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#ifdef notdef
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if (st->st_uid != 0)
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tcpd_warn("%s: not owned by root", path);
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if (st->st_mode & 020)
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tcpd_warn("%s: group writable", path);
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#endif
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if (st->st_mode & 002)
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tcpd_warn("%s: world writable", path);
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if (path[0] == '/' && path[1] != 0) {
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strlcpy(buf, path, sizeof(buf));
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strrchr(buf, '/')[0] = 0;
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(void) check_path(buf[0] ? buf : "/", &stbuf);
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}
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return (0);
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}
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