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5ad7270f30
This fixes a security vulnerability in the bundled resolver library. Requested by: scottl(re)
298 lines
8.2 KiB
C
298 lines
8.2 KiB
C
/* trace.c
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Subroutines that support dhcp tracing... */
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/*
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* Copyright (c) 2001-2002 Internet Software Consortium.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of The Internet Software Consortium nor the names
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* of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This software has been written for the Internet Software Consortium
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* by Ted Lemon, as part of a project for Nominum, Inc. To learn more
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* about the Internet Software Consortium, see http://www.isc.org/. To
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* learn more about Nominum, Inc., see ``http://www.nominum.com''.
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*/
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#include "dhcpd.h"
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#if defined (TRACING)
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void trace_interface_register (trace_type_t *ttype, struct interface_info *ip)
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{
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trace_interface_packet_t tipkt;
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if (trace_record ()) {
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memset (&tipkt, 0, sizeof tipkt);
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memcpy (&tipkt.hw_address,
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&ip -> hw_address, sizeof ip -> hw_address);
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memcpy (&tipkt.primary_address,
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&ip -> primary_address, sizeof ip -> primary_address);
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memcpy (tipkt.name, ip -> name, sizeof ip -> name);
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tipkt.index = htonl (ip -> index);
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trace_write_packet (ttype, sizeof tipkt, (char *)&tipkt, MDL);
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}
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}
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void trace_interface_input (trace_type_t *ttype, unsigned len, char *buf)
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{
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trace_interface_packet_t *tipkt;
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struct interface_info *ip;
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struct sockaddr_in *sin;
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struct iaddr addr;
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isc_result_t status;
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if (len != sizeof *tipkt) {
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log_error ("trace interface packet size mismatch: %ld != %d",
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(long)(sizeof *tipkt), len);
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return;
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}
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tipkt = (trace_interface_packet_t *)buf;
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ip = (struct interface_info *)0;
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status = interface_allocate (&ip, MDL);
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if (status != ISC_R_SUCCESS) {
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foo:
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log_error ("trace_interface_input: %s.",
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isc_result_totext (status));
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return;
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}
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ip -> ifp = dmalloc (sizeof *(ip -> ifp), MDL);
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if (!ip -> ifp) {
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interface_dereference (&ip, MDL);
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status = ISC_R_NOMEMORY;
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goto foo;
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}
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memcpy (&ip -> hw_address, &tipkt -> hw_address,
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sizeof ip -> hw_address);
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memcpy (&ip -> primary_address, &tipkt -> primary_address,
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sizeof ip -> primary_address);
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memcpy (ip -> name, tipkt -> name, sizeof ip -> name);
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ip -> index = ntohl (tipkt -> index);
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interface_snorf (ip, 0);
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if (dhcp_interface_discovery_hook)
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(*dhcp_interface_discovery_hook) (ip);
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/* Fake up an ifp. */
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memcpy (ip -> ifp -> ifr_name, ip -> name, sizeof ip -> name);
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#ifdef HAVE_SA_LEN
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ip -> ifp -> ifr_addr.sa_len = sizeof (struct sockaddr_in);
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#endif
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sin = (struct sockaddr_in *)&ip -> ifp -> ifr_addr;
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sin -> sin_addr = ip -> primary_address;
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addr.len = 4;
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memcpy (addr.iabuf, &sin -> sin_addr.s_addr, addr.len);
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if (dhcp_interface_setup_hook)
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(*dhcp_interface_setup_hook) (ip, &addr);
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interface_stash (ip);
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if (!quiet_interface_discovery) {
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log_info ("Listening on Trace/%s/%s%s%s",
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ip -> name,
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print_hw_addr (ip -> hw_address.hbuf [0],
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ip -> hw_address.hlen - 1,
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&ip -> hw_address.hbuf [1]),
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(ip -> shared_network ? "/" : ""),
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(ip -> shared_network ?
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ip -> shared_network -> name : ""));
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if (strcmp (ip -> name, "fallback")) {
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log_info ("Sending on Trace/%s/%s%s%s",
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ip -> name,
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print_hw_addr (ip -> hw_address.hbuf [0],
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ip -> hw_address.hlen - 1,
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&ip -> hw_address.hbuf [1]),
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(ip -> shared_network ? "/" : ""),
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(ip -> shared_network ?
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ip -> shared_network -> name : ""));
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}
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}
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interface_dereference (&ip, MDL);
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}
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void trace_interface_stop (trace_type_t *ttype) {
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/* XXX */
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}
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void trace_inpacket_stash (struct interface_info *interface,
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struct dhcp_packet *packet,
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unsigned len,
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unsigned int from_port,
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struct iaddr from,
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struct hardware *hfrom)
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{
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trace_inpacket_t tip;
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trace_iov_t iov [2];
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if (!trace_record ())
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return;
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tip.from_port = from_port;
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tip.from = from;
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if (hfrom) {
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tip.hfrom = *hfrom;
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tip.havehfrom = 1;
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} else {
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memset (&tip.hfrom, 0, sizeof tip.hfrom);
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tip.havehfrom = 0;
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}
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tip.index = htonl (interface -> index);
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iov [0].buf = (char *)&tip;
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iov [0].len = sizeof tip;
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iov [1].buf = (char *)packet;
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iov [1].len = len;
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trace_write_packet_iov (inpacket_trace, 2, iov, MDL);
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}
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void trace_inpacket_input (trace_type_t *ttype, unsigned len, char *buf)
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{
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trace_inpacket_t *tip;
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int index;
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if (len < sizeof *tip) {
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log_error ("trace_input_packet: too short - %d", len);
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return;
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}
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tip = (trace_inpacket_t *)buf;
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index = ntohl (tip -> index);
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if (index > interface_count ||
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index < 0 ||
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!interface_vector [index]) {
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log_error ("trace_input_packet: unknown interface index %d",
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index);
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return;
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}
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if (!bootp_packet_handler) {
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log_error ("trace_input_packet: no bootp packet handler.");
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return;
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}
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(*bootp_packet_handler) (interface_vector [index],
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(struct dhcp_packet *)(tip + 1),
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len - sizeof *tip,
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tip -> from_port,
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tip -> from,
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(tip -> havehfrom ?
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&tip -> hfrom
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: (struct hardware *)0));
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}
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void trace_inpacket_stop (trace_type_t *ttype) { }
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ssize_t trace_packet_send (struct interface_info *interface,
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struct packet *packet,
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struct dhcp_packet *raw,
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size_t len,
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struct in_addr from,
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struct sockaddr_in *to,
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struct hardware *hto)
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{
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trace_outpacket_t tip;
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trace_iov_t iov [2];
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if (trace_record ()) {
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if (hto) {
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tip.hto = *hto;
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tip.havehto = 1;
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} else {
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memset (&tip.hto, 0, sizeof tip.hto);
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tip.havehto = 0;
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}
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tip.from.len = 4;
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memcpy (tip.from.iabuf, &from, 4);
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tip.to.len = 4;
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memcpy (tip.to.iabuf, &to -> sin_addr, 4);
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tip.to_port = to -> sin_port;
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tip.index = htonl (interface -> index);
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iov [0].buf = (char *)&tip;
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iov [0].len = sizeof tip;
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iov [1].buf = (char *)raw;
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iov [1].len = len;
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trace_write_packet_iov (outpacket_trace, 2, iov, MDL);
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}
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if (!trace_playback ()) {
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return send_packet (interface, packet, raw, len,
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from, to, hto);
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}
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return len;
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}
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void trace_outpacket_input (trace_type_t *ttype, unsigned len, char *buf)
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{
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trace_outpacket_t *tip;
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int index;
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if (len < sizeof *tip) {
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log_error ("trace_input_packet: too short - %d", len);
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return;
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}
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tip = (trace_outpacket_t *)buf;
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index = ntohl (tip -> index);
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if (index > interface_count ||
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index < 0 ||
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!interface_vector [index]) {
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log_error ("trace_input_packet: unknown interface index %d",
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index);
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return;
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}
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/* XXX would be nice to somehow take notice of these. */
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}
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void trace_outpacket_stop (trace_type_t *ttype) { }
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void trace_seed_stash (trace_type_t *ttype, unsigned seed)
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{
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u_int32_t outseed;
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if (!trace_record ())
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return;
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outseed = htonl (seed);
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trace_write_packet (ttype, sizeof outseed, (char *)&outseed, MDL);
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return;
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}
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void trace_seed_input (trace_type_t *ttype, unsigned length, char *buf)
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{
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u_int32_t *seed;
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if (length != sizeof seed) {
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log_error ("trace_seed_input: wrong size (%d)", length);
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}
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seed = (u_int32_t *)buf;
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srandom (ntohl (*seed));
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}
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void trace_seed_stop (trace_type_t *ttype) { }
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#endif /* TRACING */
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