mir/isc-dhcp
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/dhcp synced 2025-08-30 13:57:50 +00:00
Code Issues Releases Wiki Activity

Don't write leases that contain non-printable or whitespace characters.

Browse Source
This commit is contained in:
Ted Lemon
1998-08-05 19:32:20 +00:00
parent 1409f29058
commit 6fdff3b8eb
1 changed files with 13 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
server/db.c
View File

@@ -42,7 +42,7 @@
#ifndef lint #ifndef lint
static char copyright[] = static char copyright[] =
"$Id: db.c,v 1.18 1998/03/15 20:46:22 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n"; "$Id: db.c,v 1.19 1998/08/05 19:32:20 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */ #endif /* not lint */
#include "dhcpd.h" #include "dhcpd.h"
@@ -61,6 +61,7 @@ int write_lease (lease)
struct tm *t; struct tm *t;
char tbuf [64]; char tbuf [64];
int errors = 0; int errors = 0;
int i;
if (counting) if (counting)
++count; ++count;
@@ -137,6 +138,10 @@ int write_lease (lease)
} }
} }
if (lease -> client_hostname) { if (lease -> client_hostname) {
for (i = 0; lease -> client_hostname [i]; i++)
if (lease -> client_hostname [i] < 33 ||
lease -> client_hostname [i] > 126)
goto bad_client_hostname;
errno = 0; errno = 0;
fprintf (db_file, "\n\tclient-hostname \"%s\";", fprintf (db_file, "\n\tclient-hostname \"%s\";",
lease -> client_hostname); lease -> client_hostname);
@@ -144,7 +149,13 @@ int write_lease (lease)
++errors; ++errors;
} }
} }
bad_client_hostname:
if (lease -> hostname) { if (lease -> hostname) {
for (i = 0; lease -> hostname [i]; i++)
if (lease -> hostname [i] < 33 ||
lease -> hostname [i] > 126)
goto bad_hostname;
errno = 0;
errno = 0; errno = 0;
fprintf (db_file, "\n\thostname \"%s\";", fprintf (db_file, "\n\thostname \"%s\";",
lease -> hostname); lease -> hostname);
@@ -152,6 +163,7 @@ int write_lease (lease)
++errors; ++errors;
} }
} }
bad_hostname:
errno = 0; errno = 0;
fputs ("\n}\n", db_file); fputs ("\n}\n", db_file);
if (errno) { if (errno) {