Use realhostname() rather than various combinations of
gethostbyaddr() & gethostbyname(). Remove brokeness in ftpd for hosts of MAXHOSTNAMELEN length.
This commit is contained in:
Brian Somers
parent
595f220e04
commit
32af26a501
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=45393
@ -42,10 +42,10 @@ static const char copyright[] =
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static char sccsid[] = "@(#)fingerd.c 8.1 (Berkeley) 6/4/93";
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#endif
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static const char rcsid[] =
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"$Id: fingerd.c,v 1.10 1997/11/20 07:26:04 charnier Exp $";
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"$Id: fingerd.c,v 1.11 1998/05/15 03:23:28 jb Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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@ -70,11 +70,11 @@ main(argc, argv)
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register FILE *fp;
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register int ch;
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register char *lp;
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struct hostent *hp;
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struct sockaddr_in sin;
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int p[2], logging, secure, sval;
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#define ENTRIES 50
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char **ap, *av[ENTRIES + 1], **comp, line[1024], *prog;
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char rhost[MAXHOSTNAMELEN + 1];
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prog = _PATH_FINGER;
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logging = secure = 0;
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@ -130,12 +130,8 @@ main(argc, argv)
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sval = sizeof(sin);
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if (getpeername(0, (struct sockaddr *)&sin, &sval) < 0)
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logerr("getpeername: %s", strerror(errno));
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if (hp = gethostbyaddr((char *)&sin.sin_addr.s_addr,
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sizeof(sin.sin_addr.s_addr), AF_INET))
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lp = hp->h_name;
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else
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lp = inet_ntoa(sin.sin_addr);
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syslog(LOG_NOTICE, "query from %s: `%s'", lp, t);
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realhostname(rhost, sizeof rhost - 1, &sin.sin_addr);
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syslog(LOG_NOTICE, "query from %s: `%s'", rhost, t);
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}
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comp = &av[1];
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@ -44,7 +44,7 @@ static char copyright[] =
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static char sccsid[] = "@(#)ftpd.c 8.4 (Berkeley) 4/16/94";
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#endif
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static const char rcsid[] =
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"$Id: ftpd.c,v 1.51 1998/06/03 11:33:44 jb Exp $";
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"$Id: ftpd.c,v 1.52 1998/10/13 20:42:01 des Exp $";
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#endif /* not lint */
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/*
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@ -166,7 +166,7 @@ static struct ftphost {
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} *thishost, *firsthost;
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#endif
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char remotehost[MAXHOSTNAMELEN];
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char remotehost[MAXHOSTNAMELEN + 1];
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char *ident = NULL;
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static char ttyline[20];
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@ -1896,14 +1896,8 @@ static void
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dolog(sin)
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struct sockaddr_in *sin;
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{
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struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr,
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sizeof(struct in_addr), AF_INET);
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realhostname(remotehost, sizeof remotehost - 1, &sin->sin_addr);
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if (hp)
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(void) strncpy(remotehost, hp->h_name, sizeof(remotehost));
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else
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(void) strncpy(remotehost, inet_ntoa(sin->sin_addr),
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sizeof(remotehost));
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#ifdef SETPROCTITLE
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#ifdef VIRTUAL_HOSTING
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if (thishost != firsthost)
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@ -42,7 +42,7 @@ static const char copyright[] =
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static char sccsid[] = "@(#)rexecd.c 8.1 (Berkeley) 6/4/93";
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#endif
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static const char rcsid[] =
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"$Id$";
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"$Id: rexecd.c,v 1.15 1997/11/26 07:29:04 charnier Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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@ -55,6 +55,7 @@ static const char rcsid[] =
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#include <err.h>
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#include <netdb.h>
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#include <libutil.h>
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#include <paths.h>
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#include <pwd.h>
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#include <signal.h>
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@ -72,7 +73,7 @@ char path[sizeof(_PATH_DEFPATH) + sizeof("PATH=")] = "PATH=";
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char *envinit[] =
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{homedir, shell, path, username, 0};
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char **environ;
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char *remote;
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char remote[MAXHOSTNAMELEN + 1];
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struct sockaddr_in asin = { AF_INET };
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@ -103,10 +104,7 @@ main(argc, argv)
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if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0)
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err(1, "getpeername");
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hp = gethostbyaddr((char *) &from.sin_addr, sizeof(from.sin_addr),
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from.sin_family);
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remote = inet_ntoa(from.sin_addr);
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remote = (hp != NULL) ? hp->h_name : inet_ntoa(from.sin_addr);
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realhostname(remote, sizeof remote - 1, &from.sin_addr);
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doit(0, &from);
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return(0);
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@ -42,7 +42,7 @@ static const char copyright[] =
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static const char sccsid[] = "@(#)rlogind.c 8.1 (Berkeley) 6/4/93";
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#endif
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static const char rcsid[] =
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"$Id: rlogind.c,v 1.19 1997/11/25 07:17:15 charnier Exp $";
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"$Id: rlogind.c,v 1.20 1998/12/16 07:20:44 peter Exp $";
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#endif /* not lint */
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/*
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@ -211,7 +211,6 @@ doit(f, fromp)
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{
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int master, pid, on = 1;
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int authenticated = 0;
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register struct hostent *hp;
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char hostname[2 * MAXHOSTNAMELEN + 1];
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char c;
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@ -227,31 +226,7 @@ doit(f, fromp)
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alarm(0);
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fromp->sin_port = ntohs((u_short)fromp->sin_port);
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hp = gethostbyaddr((char *)&fromp->sin_addr, sizeof(struct in_addr),
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fromp->sin_family);
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if (hp) {
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strncpy(hostname, hp->h_name, sizeof(hostname) - 1);
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hostname[sizeof(hostname) - 1] = '\0';
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hp = gethostbyname(hostname);
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if (hp == NULL) {
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strncpy(hostname, inet_ntoa(fromp->sin_addr),
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sizeof(hostname) - 1);
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} else for (; ; hp->h_addr_list++) {
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if (hp->h_addr_list[0] == NULL) {
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/* End of list - ditch it */
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strncpy(hostname, inet_ntoa(fromp->sin_addr),
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sizeof(hostname) - 1);
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break;
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}
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if (!bcmp(hp->h_addr_list[0],
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(caddr_t)&fromp->sin_addr,
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sizeof(fromp->sin_addr)))
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break; /* OK! */
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}
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} else {
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strncpy(hostname, inet_ntoa(fromp->sin_addr),
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sizeof(hostname) - 1);
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}
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realhostname(hostname, sizeof hostname - 1, &fromp->sin_addr);
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hostname[sizeof(hostname) - 1] = '\0';
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#ifdef KERBEROS
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@ -42,7 +42,7 @@ static const char copyright[] =
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static const char sccsid[] = "@(#)rshd.c 8.2 (Berkeley) 4/6/94";
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#endif
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static const char rcsid[] =
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"$Id: rshd.c,v 1.22 1998/12/01 23:27:24 dg Exp $";
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"$Id: rshd.c,v 1.23 1998/12/16 07:20:45 peter Exp $";
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#endif /* not lint */
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/*
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@ -67,6 +67,7 @@ static const char rcsid[] =
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#include <errno.h>
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#include <fcntl.h>
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#include <libutil.h>
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#include <paths.h>
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#include <pwd.h>
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#include <signal.h>
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@ -207,13 +208,12 @@ doit(fromp)
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struct sockaddr_in *fromp;
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{
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extern char *__rcmd_errstr; /* syslog hook from libc/net/rcmd.c. */
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struct hostent *hp;
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struct passwd *pwd;
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u_short port;
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fd_set ready, readfrom;
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int cc, nfd, pv[2], pid, s;
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int one = 1;
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char *hostname, *errorstr;
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char *errorstr;
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char *cp, sig, buf[BUFSIZ];
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char cmdbuf[NCARGS+1], locuser[16], remuser[16];
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char fromhost[2 * MAXHOSTNAMELEN + 1];
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@ -350,36 +350,8 @@ doit(fromp)
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errorstr = NULL;
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strncpy(fromhost, inet_ntoa(fromp->sin_addr),
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sizeof(fromhost) - 1);
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hostname = fromhost;
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hp = gethostbyaddr((char *)&fromp->sin_addr, sizeof (struct in_addr),
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fromp->sin_family);
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if (hp) {
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/*
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* OK, it looks like a DNS name is attached.. Lets see if
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* it looks like we can use it. If it doesn't check out,
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* ditch it and use the IP address for logging instead.
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* Note that iruserok() does it's own hostname checking!!
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*/
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strncpy(fromhost, hp->h_name, sizeof(fromhost) - 1);
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fromhost[sizeof(fromhost) - 1] = 0;
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hp = gethostbyname(fromhost);
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if (hp == NULL) {
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strncpy(fromhost, inet_ntoa(fromp->sin_addr),
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sizeof(fromhost) - 1);
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} else for (; ; hp->h_addr_list++) {
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if (hp->h_addr_list[0] == NULL) {
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/* End of list - ditch it */
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strncpy(fromhost, inet_ntoa(fromp->sin_addr),
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sizeof(fromhost) - 1);
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break;
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}
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if (!bcmp(hp->h_addr_list[0],
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(caddr_t)&fromp->sin_addr,
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sizeof(fromp->sin_addr)))
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break; /* OK! */
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}
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}
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fromhost[sizeof(fromhost) - 1] = 0;
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realhostname(fromhost, sizeof fromhost - 1, &fromp->sin_addr);
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fromhost[sizeof(fromhost) - 1] = '\0';
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#ifdef KERBEROS
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if (use_kerberos) {
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@ -426,7 +398,7 @@ doit(fromp)
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if (pwd == NULL) {
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syslog(LOG_INFO|LOG_AUTH,
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"%s@%s as %s: unknown login. cmd='%.80s'",
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remuser, hostname, locuser, cmdbuf);
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remuser, fromhost, locuser, cmdbuf);
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if (errorstr == NULL)
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errorstr = "Login incorrect.\n";
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goto fail;
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@ -440,7 +412,7 @@ doit(fromp)
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login_getcapbool(lc, "requirehome", !!pwd->pw_uid)) {
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syslog(LOG_INFO|LOG_AUTH,
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"%s@%s as %s: no home directory. cmd='%.80s'",
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remuser, hostname, locuser, cmdbuf);
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remuser, fromhost, locuser, cmdbuf);
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error("No remote home directory.\n");
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exit(0);
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}
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@ -449,7 +421,7 @@ doit(fromp)
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#ifdef notdef
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syslog(LOG_INFO|LOG_AUTH,
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"%s@%s as %s: no home directory. cmd='%.80s'",
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remuser, hostname, locuser, cmdbuf);
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remuser, fromhost, locuser, cmdbuf);
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error("No remote directory.\n");
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exit(1);
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#endif
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@ -479,16 +451,16 @@ doit(fromp)
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if (__rcmd_errstr)
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syslog(LOG_INFO|LOG_AUTH,
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"%s@%s as %s: permission denied (%s). cmd='%.80s'",
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remuser, hostname, locuser, __rcmd_errstr,
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remuser, fromhost, locuser, __rcmd_errstr,
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cmdbuf);
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else
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syslog(LOG_INFO|LOG_AUTH,
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"%s@%s as %s: permission denied. cmd='%.80s'",
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remuser, hostname, locuser, cmdbuf);
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remuser, fromhost, locuser, cmdbuf);
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fail:
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if (errorstr == NULL)
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errorstr = "Login incorrect.\n";
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error(errorstr, hostname);
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error(errorstr, fromhost);
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exit(1);
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}
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@ -506,7 +478,7 @@ doit(fromp)
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if (!auth_hostok(lc, fromhost, remote_ip)) {
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syslog(LOG_INFO|LOG_AUTH,
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"%s@%s as %s: permission denied (%s). cmd='%.80s'",
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remuser, hostname, locuser, __rcmd_errstr,
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remuser, fromhost, locuser, __rcmd_errstr,
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cmdbuf);
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error("Login incorrect.\n");
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exit(1);
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@ -729,11 +701,11 @@ doit(fromp)
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syslog(LOG_INFO|LOG_AUTH,
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"Kerberos shell from %s.%s@%s on %s as %s, cmd='%.80s'",
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kdata->pname, kdata->pinst, kdata->prealm,
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hostname, locuser, cmdbuf);
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fromhost, locuser, cmdbuf);
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else
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#endif
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syslog(LOG_INFO|LOG_AUTH, "%s@%s as %s: cmd='%.80s'",
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remuser, hostname, locuser, cmdbuf);
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remuser, fromhost, locuser, cmdbuf);
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}
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execl(pwd->pw_shell, cp, "-c", cmdbuf, 0);
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perror(pwd->pw_shell);
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@ -42,7 +42,7 @@ static const char copyright[] =
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static char sccsid[] = "@(#)telnetd.c 8.2 (Berkeley) 12/15/93";
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#endif
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static const char rcsid[] =
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"$Id: telnetd.c,v 1.15 1998/12/16 06:04:29 peter Exp $";
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"$Id: telnetd.c,v 1.16 1999/04/06 00:29:41 brian Exp $";
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#endif /* not lint */
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#include "telnetd.h"
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@ -61,6 +61,8 @@ static const char rcsid[] =
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#include <arpa/inet.h>
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#include <sys/mman.h>
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#include <libutil.h>
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#include <utmp.h>
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#if defined(_SC_CRAY_SECURE_SYS)
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#include <sys/sysv.h>
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@ -756,7 +758,7 @@ terminaltypeok(s)
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char *hostname;
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char host_name[MAXHOSTNAMELEN];
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char remote_host_name[MAXHOSTNAMELEN];
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char remote_hostname[UT_HOSTSIZE + 1];
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extern void telnet P((int, int, char *));
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@ -769,8 +771,6 @@ char user_name[256];
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doit(who)
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struct sockaddr_in *who;
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{
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char *host = NULL;
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struct hostent *hp;
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int ptynum;
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/*
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@ -813,47 +813,16 @@ doit(who)
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#endif /* _SC_CRAY_SECURE_SYS */
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/* get name of connected client */
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hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr),
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who->sin_family);
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if (hp == NULL && registerd_host_only) {
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if (realhostname(remote_hostname, sizeof remote_hostname - 1,
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&who->sin_addr) == HOSTNAME_INVALIDADDR && registerd_host_only)
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fatal(net, "Couldn't resolve your address into a host name.\r\n\
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Please contact your net administrator");
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} else if (hp &&
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(strlen(hp->h_name) <= ((utmp_len < 0) ? -utmp_len : utmp_len))) {
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strncpy(remote_host_name, hp->h_name,
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sizeof(remote_host_name)-1);
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hp = gethostbyname(remote_host_name);
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if (hp == NULL)
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host = inet_ntoa(who->sin_addr);
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else for (; ; hp->h_addr_list++) {
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if (hp->h_addr_list[0] == NULL) {
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/* End of list - ditch it */
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host = inet_ntoa(who->sin_addr);
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break;
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}
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if (!bcmp(hp->h_addr_list[0], (caddr_t)&who->sin_addr,
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sizeof(who->sin_addr))) {
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host = hp->h_name;
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break; /* OK! */
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}
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}
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} else {
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host = inet_ntoa(who->sin_addr);
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}
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/*
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* We must make a copy because Kerberos is probably going
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* to also do a gethost* and overwrite the static data...
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*/
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strncpy(remote_host_name, host, sizeof(remote_host_name)-1);
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remote_host_name[sizeof(remote_host_name)-1] = 0;
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host = remote_host_name;
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(void) gethostname(host_name, sizeof (host_name));
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hostname = host_name;
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#if defined(AUTHENTICATION)
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auth_encrypt_init(hostname, host, "TELNETD", 1);
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auth_encrypt_init(hostname, remote_hostname, "TELNETD", 1);
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#endif
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init_env();
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@ -873,7 +842,7 @@ doit(who)
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}
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#endif /* _SC_CRAY_SECURE_SYS */
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telnet(net, pty, host); /* begin server process */
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telnet(net, pty, remote_hostname); /* begin server process */
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/*NOTREACHED*/
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} /* end of doit */
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@ -1,8 +1,10 @@
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# @(#)Makefile 8.1 (Berkeley) 6/4/93
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# $Id$
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# $Id: Makefile,v 1.5 1997/02/22 14:22:35 peter Exp $
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PROG= tftpd
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SRCS= tftpd.c tftpsubs.c
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DPADD= ${LIBUTIL}
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LDADD= -lutil
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MAN8= tftpd.8
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CFLAGS+=-I${.CURDIR}/../../usr.bin/tftp
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.PATH: ${.CURDIR}/../../usr.bin/tftp
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@ -42,7 +42,7 @@ static const char copyright[] =
|
||||
static char sccsid[] = "@(#)tftpd.c 8.1 (Berkeley) 6/4/93";
|
||||
#endif
|
||||
static const char rcsid[] =
|
||||
"$Id: tftpd.c,v 1.11 1998/04/12 11:15:54 phk Exp $";
|
||||
"$Id: tftpd.c,v 1.12 1998/10/30 16:17:39 dg Exp $";
|
||||
#endif /* not lint */
|
||||
|
||||
/*
|
||||
@ -65,6 +65,7 @@ static const char rcsid[] =
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <libutil.h>
|
||||
#include <netdb.h>
|
||||
#include <pwd.h>
|
||||
#include <setjmp.h>
|
||||
@ -108,7 +109,6 @@ static int logging;
|
||||
|
||||
static char *errtomsg __P((int));
|
||||
static void nak __P((int));
|
||||
static char *verifyhost __P((struct sockaddr_in *));
|
||||
|
||||
int
|
||||
main(argc, argv)
|
||||
@ -325,8 +325,11 @@ tftp(tp, size)
|
||||
}
|
||||
ecode = (*pf->f_validate)(&filename, tp->th_opcode);
|
||||
if (logging) {
|
||||
syslog(LOG_INFO, "%s: %s request for %s: %s",
|
||||
verifyhost(&from),
|
||||
char host[MAXHOSTNAMELEN + 1];
|
||||
|
||||
realhostname(host, sizeof host - 1, &from.sin_addr);
|
||||
host[sizeof host - 1] = '\0';
|
||||
syslog(LOG_INFO, "%s: %s request for %s: %s", host,
|
||||
tp->th_opcode == WRQ ? "write" : "read",
|
||||
filename, errtomsg(ecode));
|
||||
}
|
||||
@ -670,17 +673,3 @@ nak(error)
|
||||
if (send(peer, buf, length, 0) != length)
|
||||
syslog(LOG_ERR, "nak: %m");
|
||||
}
|
||||
|
||||
static char *
|
||||
verifyhost(fromp)
|
||||
struct sockaddr_in *fromp;
|
||||
{
|
||||
struct hostent *hp;
|
||||
|
||||
hp = gethostbyaddr((char *)&fromp->sin_addr, sizeof (fromp->sin_addr),
|
||||
fromp->sin_family);
|
||||
if (hp)
|
||||
return hp->h_name;
|
||||
else
|
||||
return inet_ntoa(fromp->sin_addr);
|
||||
}
|
||||
|
||||
@ -45,7 +45,7 @@ static const char copyright[] =
|
||||
static char sccsid[] = "@(#)uucpd.c 8.1 (Berkeley) 6/4/93";
|
||||
#endif
|
||||
static const char rcsid[] =
|
||||
"$Id: uucpd.c,v 1.15 1998/06/30 15:19:51 bde Exp $";
|
||||
"$Id: uucpd.c,v 1.16 1999/03/30 10:23:35 joerg Exp $";
|
||||
#endif /* not lint */
|
||||
|
||||
/*
|
||||
@ -121,16 +121,8 @@ void main(int argc, char **argv)
|
||||
void badlogin(char *name, struct sockaddr_in *sin)
|
||||
{
|
||||
char remotehost[MAXHOSTNAMELEN];
|
||||
struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr,
|
||||
sizeof (struct in_addr), AF_INET);
|
||||
|
||||
if (hp) {
|
||||
strncpy(remotehost, hp->h_name, sizeof (remotehost));
|
||||
endhostent();
|
||||
} else
|
||||
strncpy(remotehost, inet_ntoa(sin->sin_addr),
|
||||
sizeof (remotehost));
|
||||
|
||||
realhostname(remotehost, sizeof remotehost - 1, &sin->sin_addr);
|
||||
remotehost[sizeof remotehost - 1] = '\0';
|
||||
|
||||
syslog(LOG_NOTICE, "LOGIN FAILURE FROM %s", remotehost);
|
||||
@ -251,19 +243,13 @@ void dologout(void)
|
||||
void dologin(struct passwd *pw, struct sockaddr_in *sin)
|
||||
{
|
||||
char line[32];
|
||||
char remotehost[MAXHOSTNAMELEN];
|
||||
char remotehost[UT_HOSTSIZE + 1];
|
||||
int f;
|
||||
time_t cur_time;
|
||||
struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr,
|
||||
sizeof (struct in_addr), AF_INET);
|
||||
|
||||
if (hp) {
|
||||
strncpy(remotehost, hp->h_name, sizeof (remotehost));
|
||||
endhostent();
|
||||
} else
|
||||
strncpy(remotehost, inet_ntoa(sin->sin_addr),
|
||||
sizeof (remotehost));
|
||||
realhostname(remotehost, sizeof remotehost - 1, &sin->sin_addr);
|
||||
remotehost[sizeof remotehost - 1] = '\0';
|
||||
|
||||
/* hack, but must be unique and no tty line */
|
||||
sprintf(line, "uucp%ld", (long)getpid());
|
||||
time(&cur_time);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user