479 lines
12 KiB
C
479 lines
12 KiB
C
/* mrtrace.c
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Subroutines that support minires tracing... */
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/*
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 2001-2003 by Internet Software Consortium
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Internet Systems Consortium, Inc.
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* 950 Charter Street
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* Redwood City, CA 94063
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* <info@isc.org>
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* http://www.isc.org/
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*
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* This software has been written for Internet Systems Consortium
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* by Ted Lemon, as part of a project for Nominum, Inc. To learn more
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* about Internet Systems 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 <omapip/omapip_p.h>
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#include "minires/minires.h"
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#include "arpa/nameser.h"
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static void trace_mr_output_input (trace_type_t *, unsigned, char *);
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static void trace_mr_output_stop (trace_type_t *);
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static void trace_mr_input_input (trace_type_t *, unsigned, char *);
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static void trace_mr_input_stop (trace_type_t *);
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static void trace_mr_statp_input (trace_type_t *, unsigned, char *);
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static void trace_mr_statp_stop (trace_type_t *);
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static void trace_mr_randomid_input (trace_type_t *, unsigned, char *);
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static void trace_mr_randomid_stop (trace_type_t *);
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trace_type_t *trace_mr_output;
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trace_type_t *trace_mr_input;
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trace_type_t *trace_mr_statp;
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trace_type_t *trace_mr_randomid;
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ssize_t trace_mr_send (int, void *, size_t, int);
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ssize_t trace_mr_read_playback (struct sockaddr_in *, void *, size_t);
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void trace_mr_read_record (struct sockaddr_in *, void *, ssize_t);
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ssize_t trace_mr_recvfrom (int s, void *, size_t, int,
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struct sockaddr *, SOCKLEN_T *);
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ssize_t trace_mr_read (int, void *, size_t);
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int trace_mr_connect (int s, struct sockaddr *, SOCKLEN_T);
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int trace_mr_socket (int, int, int);
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int trace_mr_bind (int, struct sockaddr *, SOCKLEN_T);
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int trace_mr_close (int);
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time_t trace_mr_time (time_t *);
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int trace_mr_select (int, fd_set *, fd_set *, fd_set *, struct timeval *);
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unsigned int trace_mr_res_randomid (unsigned int);
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extern TIME cur_time;
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#if defined (TRACING)
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void trace_mr_init ()
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{
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trace_mr_output = trace_type_register ("mr-output", (void *)0,
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trace_mr_output_input,
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trace_mr_output_stop, MDL);
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trace_mr_input = trace_type_register ("mr-input", (void *)0,
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trace_mr_input_input,
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trace_mr_input_stop, MDL);
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trace_mr_statp = trace_type_register ("mr-statp", (void *)0,
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trace_mr_statp_input,
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trace_mr_statp_stop, MDL);
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trace_mr_randomid = trace_type_register ("mr-randomid", (void *)0,
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trace_mr_randomid_input,
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trace_mr_randomid_stop, MDL);
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}
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void trace_mr_statp_setup (res_state statp)
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{
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unsigned buflen = 0;
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char *buf = (char *)0;
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isc_result_t status;
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int i;
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if (trace_playback ()) {
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int nscount;
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status = trace_get_packet (&trace_mr_statp, &buflen, &buf);
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if (status != ISC_R_SUCCESS) {
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log_error ("trace_mr_statp: no statp packet found.");
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return;
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}
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nscount = buflen / sizeof (struct in_addr);
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if (nscount * (sizeof (struct in_addr)) != buflen ||
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nscount < 1) {
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log_error ("trace_mr_statp: bogus length: %d",
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buflen);
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return;
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}
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if (nscount > MAXNS)
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nscount = MAXNS;
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for (i = 0; i < nscount; i++) {
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#if defined (HAVE_SA_LEN)
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statp -> nsaddr_list [i].sin_len =
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sizeof (struct sockaddr_in);
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#endif
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memset (&statp -> nsaddr_list [i], 0,
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sizeof statp -> nsaddr_list [i]);
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statp -> nsaddr_list [i].sin_port = htons (53); /*XXX*/
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statp -> nsaddr_list [i].sin_family = AF_INET;
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memcpy (&statp -> nsaddr_list [i].sin_addr,
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(buf + i * (sizeof (struct in_addr))),
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sizeof (struct in_addr));
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}
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statp -> nscount = nscount;
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dfree (buf, MDL);
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buf = (char *)0;
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}
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if (trace_record ()) {
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trace_iov_t *iov;
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iov = dmalloc ((statp -> nscount *
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sizeof (trace_iov_t)), MDL);
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if (!iov) {
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trace_stop ();
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log_error ("No memory for statp iov.");
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return;
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}
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for (i = 0; i < statp -> nscount; i++) {
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iov [i].buf =
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(char *)&statp -> nsaddr_list [i].sin_addr;
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iov [i].len = sizeof (struct in_addr);
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}
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trace_write_packet_iov (trace_mr_statp, i, iov, MDL);
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dfree (iov, MDL);
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}
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}
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#endif
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ssize_t trace_mr_send (int fd, void *msg, size_t len, int flags)
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{
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ssize_t rv;
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#if defined (TRACING)
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isc_result_t status;
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unsigned buflen = 0;
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char *inbuf = (char *)0;
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u_int32_t result;
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u_int32_t sflags;
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if (trace_playback()) {
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status = trace_get_packet (&trace_mr_output, &buflen, &inbuf);
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if (status != ISC_R_SUCCESS) {
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log_error ("trace_mr_recvfrom: no input found.");
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errno = ECONNREFUSED;
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return -1;
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}
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if (buflen < sizeof result) {
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log_error ("trace_mr_recvfrom: data too short.");
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errno = ECONNREFUSED;
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dfree (inbuf, MDL);
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return -1;
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}
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memcpy (&result, inbuf, sizeof result);
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rv = ntohl (result);
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dfree (inbuf, MDL);
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} else
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#endif
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rv = send (fd, msg, len, flags);
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#if defined (TRACING)
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if (trace_record ()) {
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trace_iov_t iov [3];
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result = htonl (rv);
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sflags = htonl (flags);
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iov [0].len = sizeof result;
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iov [0].buf = (char *)&result;
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iov [1].len = sizeof sflags;
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iov [1].buf = (char *)&flags;
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iov [2].len = len;
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iov [2].buf = msg;
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trace_write_packet_iov (trace_mr_output, 3, iov, MDL);
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}
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#endif
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return rv;
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}
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#if defined (TRACING)
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ssize_t trace_mr_read_playback (struct sockaddr_in *from,
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void *buf, size_t nbytes)
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{
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isc_result_t status;
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unsigned buflen = 0, left;
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char *inbuf = (char *)0;
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char *bufp;
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u_int32_t result;
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status = trace_get_packet (&trace_mr_input, &buflen, &inbuf);
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if (status != ISC_R_SUCCESS) {
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log_error ("trace_mr_recvfrom: no input found.");
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errno = ECONNREFUSED;
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return -1;
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}
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if (buflen < sizeof result) {
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log_error ("trace_mr_recvfrom: data too short.");
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errno = ECONNREFUSED;
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dfree (inbuf, MDL);
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return -1;
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}
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bufp = inbuf;
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left = buflen;
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memcpy (&result, bufp, sizeof result);
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result = ntohl (result);
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bufp += sizeof result;
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left -= sizeof result;
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if (result == 0) {
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if (left < ((sizeof from -> sin_port) +
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sizeof (from -> sin_addr))) {
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log_error ("trace_mr_recvfrom: data too short.");
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errno = ECONNREFUSED;
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dfree (inbuf, MDL);
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return -1;
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}
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if (from)
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memset (from, 0, sizeof *from);
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if (from)
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memcpy (&from -> sin_addr, bufp,
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sizeof from -> sin_addr);
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bufp += sizeof from -> sin_addr;
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left -= sizeof from -> sin_addr;
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if (from)
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memcpy (&from -> sin_port, bufp,
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sizeof from -> sin_port);
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bufp += sizeof from -> sin_port;
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left -= sizeof from -> sin_port;
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if (from) {
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from -> sin_family = AF_INET;
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#if defined(HAVE_SA_LEN)
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from -> sin_len = sizeof (struct sockaddr_in);
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#endif
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}
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if (left > nbytes) {
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log_error ("trace_mr_recvfrom: too much%s",
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" data.");
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errno = ECONNREFUSED;
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dfree (inbuf, MDL);
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return -1;
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}
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memcpy (buf, bufp, left);
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dfree (inbuf, MDL);
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return left;
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}
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errno = ECONNREFUSED;
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return -1;
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}
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void trace_mr_read_record (struct sockaddr_in *from, void *buf, ssize_t rv)
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{
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trace_iov_t iov [4];
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u_int32_t result;
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int iolen = 0;
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static char zero [4] = { 0, 0, 0, 0 };
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if (rv < 0)
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result = htonl (errno); /* XXX */
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else
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result = 0;
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iov [iolen].buf = (char *)&result;
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iov [iolen++].len = sizeof result;
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if (rv > 0) {
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if (from) {
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iov [iolen].buf = (char *)&from -> sin_addr;
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iov [iolen++].len = sizeof from -> sin_addr;
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iov [iolen].buf = (char *)&from -> sin_port;
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iov [iolen++].len = sizeof from -> sin_port;
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} else {
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iov [iolen].buf = zero;
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iov [iolen++].len = sizeof from -> sin_addr;
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iov [iolen].buf = zero;
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iov [iolen++].len = sizeof from -> sin_port;
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}
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iov [iolen].buf = buf;
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iov [iolen++].len = rv;
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}
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trace_write_packet_iov (trace_mr_input, iolen, iov, MDL);
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}
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#endif
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ssize_t trace_mr_recvfrom (int s, void *buf, size_t len, int flags,
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struct sockaddr *from, SOCKLEN_T *fromlen)
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{
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ssize_t rv;
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#if defined (TRACING)
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if (trace_playback ())
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rv = trace_mr_read_playback ((struct sockaddr_in *)from,
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buf, len);
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else
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#endif
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rv = recvfrom (s, buf, len, flags, from, fromlen);
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#if defined (TRACING)
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if (trace_record ()) {
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trace_mr_read_record ((struct sockaddr_in *)from, buf, rv);
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}
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#endif
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return rv;
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}
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ssize_t trace_mr_read (int d, void *buf, size_t nbytes)
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{
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ssize_t rv;
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#if defined (TRACING)
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if (trace_playback ())
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rv = trace_mr_read_playback ((struct sockaddr_in *)0,
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buf, nbytes);
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else
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#endif
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rv = read (d, buf, nbytes);
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#if defined (TRACING)
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if (trace_record ()) {
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trace_mr_read_record ((struct sockaddr_in *)0, buf, rv);
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}
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#endif
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return rv;
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}
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int trace_mr_connect (int s, struct sockaddr *name, SOCKLEN_T namelen)
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{
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#if defined (TRACING)
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if (!trace_playback ())
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#endif
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return connect (s, name, namelen);
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#if defined (TRACING)
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return 0;
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#endif
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}
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int trace_mr_socket (int domain, int type, int protocol)
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{
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#if defined (TRACING)
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if (!trace_playback ())
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#endif
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return socket (domain, type, protocol);
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#if defined (TRACING)
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return 100;
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#endif
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}
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int trace_mr_bind (int s, struct sockaddr *name, SOCKLEN_T namelen)
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{
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#if defined (TRACING)
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if (!trace_playback ())
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#endif
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return bind (s, name, namelen);
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#if defined (TRACING)
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return 0;
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#endif
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}
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int trace_mr_close (int s)
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{
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#if defined (TRACING)
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if (!trace_playback ())
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#endif
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return close (s);
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#if defined (TRACING)
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return 0;
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#endif
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}
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time_t trace_mr_time (time_t *tp)
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{
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#if defined (TRACING)
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if (trace_playback ()) {
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if (tp)
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*tp = cur_time;
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return cur_time;
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}
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#endif
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return time (tp);
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}
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int trace_mr_select (int s, fd_set *r, fd_set *w, fd_set *x, struct timeval *t)
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{
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#if defined (TRACING)
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trace_type_t *ttp = (trace_type_t *)0;
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if (trace_playback ()) {
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time_t nct = trace_snoop_time (&ttp);
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time_t secr = t -> tv_sec;
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t -> tv_sec = nct - cur_time;
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if (t -> tv_sec > secr)
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return 0;
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if (ttp == trace_mr_input)
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return 1;
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return 0;
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}
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#endif
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return select (s, r, w, x, t);
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}
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unsigned int trace_mr_res_randomid (unsigned int oldid)
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{
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u_int32_t id;
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int rid = oldid;
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#if defined (TRACING)
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unsigned buflen = 0;
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char *buf = (char *)0;
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isc_result_t status;
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if (trace_playback ()) {
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status = trace_get_packet (&trace_mr_randomid, &buflen, &buf);
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if (status != ISC_R_SUCCESS) {
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log_error ("trace_mr_statp: no statp packet found.");
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return oldid;
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}
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if (buflen != sizeof id) {
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log_error ("trace_mr_randomid: bogus length: %d",
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buflen);
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return oldid;
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}
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memcpy (&id, buf, sizeof id);
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dfree (buf, MDL);
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buf = (char *)0;
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rid = ntohl (id);
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}
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if (trace_record ()) {
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id = htonl (rid);
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trace_write_packet (trace_mr_randomid,
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sizeof id, (char *)&id, MDL);
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}
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#endif
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return rid;
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}
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#if defined (TRACING)
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static void trace_mr_output_input (trace_type_t *ttype,
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unsigned length, char *buf)
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{
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}
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static void trace_mr_output_stop (trace_type_t *ttype)
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{
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}
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static void trace_mr_input_input (trace_type_t *ttype,
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unsigned length, char *buf)
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{
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log_error ("unaccounted-for minires input.");
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}
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static void trace_mr_input_stop (trace_type_t *ttype)
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{
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}
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static void trace_mr_statp_input (trace_type_t *ttype,
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unsigned length, char *buf)
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{
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log_error ("unaccounted-for minires statp input.");
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}
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static void trace_mr_statp_stop (trace_type_t *ttype)
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{
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}
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static void trace_mr_randomid_input (trace_type_t *ttype,
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unsigned length, char *buf)
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{
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log_error ("unaccounted-for minires randomid input.");
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}
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static void trace_mr_randomid_stop (trace_type_t *ttype)
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{
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}
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#endif
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