File: [local] / src / usr.bin / kdump / ktrstruct.c (download)
Revision 1.29, Mon Dec 21 07:47:37 2020 UTC (3 years, 5 months ago) by otto
Branch: MAIN
CVS Tags: OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9 Changes since 1.28: +7 -4 lines
Show scope id when set; ok florian@
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/* $OpenBSD: ktrstruct.c,v 1.29 2020/12/21 07:47:37 otto Exp $ */
/*-
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/event.h>
#include <sys/un.h>
#include <sys/fcntl.h>
#include <ufs/ufs/quota.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <netdb.h>
#include <poll.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <grp.h>
#include <pwd.h>
#include <unistd.h>
#include <vis.h>
#include "kdump.h"
#include "kdump_subr.h"
#define TIME_FORMAT "%b %e %T %Y"
static void
ktrsockaddr(struct sockaddr *sa)
{
/*
* TODO: Support additional address families
* #include <netmpls/mpls.h>
* struct sockaddr_mpls *mpls;
*/
/*
* note: ktrstruct() has already verified that sa points to a
* buffer at least sizeof(struct sockaddr) bytes long and exactly
* sa->sa_len bytes long.
*/
printf("struct sockaddr { ");
sockfamilyname(sa->sa_family);
printf(", ");
#define check_sockaddr_len(n) \
if (sa_##n->s##n##_len < sizeof(struct sockaddr_##n)) { \
printf("invalid"); \
break; \
}
switch(sa->sa_family) {
case AF_INET: {
struct sockaddr_in *sa_in;
char addr[INET_ADDRSTRLEN];
sa_in = (struct sockaddr_in *)sa;
check_sockaddr_len(in);
inet_ntop(AF_INET, &sa_in->sin_addr, addr, sizeof addr);
printf("%s:%u", addr, ntohs(sa_in->sin_port));
break;
}
case AF_INET6: {
struct sockaddr_in6 *sa_in6;
char addr[INET6_ADDRSTRLEN], scope[12] = { 0 };
sa_in6 = (struct sockaddr_in6 *)sa;
check_sockaddr_len(in6);
inet_ntop(AF_INET6, &sa_in6->sin6_addr, addr, sizeof addr);
if (sa_in6->sin6_scope_id)
snprintf(scope, sizeof(scope), "%%%u",
sa_in6->sin6_scope_id);
printf("[%s%s]:%u", addr, scope, htons(sa_in6->sin6_port));
break;
}
case AF_UNIX: {
struct sockaddr_un *sa_un;
char path[4 * sizeof(sa_un->sun_path) + 1];
size_t len;
sa_un = (struct sockaddr_un *)sa;
len = sa_un->sun_len;
if (len <= offsetof(struct sockaddr_un, sun_path)) {
printf("invalid");
break;
}
len -= offsetof(struct sockaddr_un, sun_path);
if (len > sizeof(sa_un->sun_path)) {
printf("too long");
break;
}
/* format, stopping at first NUL */
len = strnlen(sa_un->sun_path, len);
strvisx(path, sa_un->sun_path, len,
VIS_CSTYLE | VIS_DQ | VIS_TAB | VIS_NL);
printf("\"%s\"", path);
break;
}
default:
printf("unknown address family");
}
printf(" }\n");
}
static void
print_time(time_t t, int relative, int have_subsec)
{
char timestr[PATH_MAX + 4];
struct tm *tm;
if (t < 0 && have_subsec) {
/* negative times with non-zero subsecs require care */
printf("-%jd", -(intmax_t)(t + 1));
} else
printf("%jd", (intmax_t)t);
/* 1970s times are probably relative */
if (!relative && t > (10 * 365 * 24 * 3600)) {
tm = localtime(&t);
if (tm != NULL) {
(void)strftime(timestr, sizeof(timestr), TIME_FORMAT,
tm);
printf("<\"%s\">", timestr);
}
}
}
static void
print_timespec(const struct timespec *tsp, int relative)
{
if (tsp->tv_nsec == UTIME_NOW)
printf("UTIME_NOW");
else if (tsp->tv_nsec == UTIME_OMIT)
printf("UTIME_OMIT");
else {
print_time(tsp->tv_sec, relative, tsp->tv_nsec);
if (tsp->tv_nsec != 0)
printf(".%09ld", tsp->tv_sec >= 0 ? tsp->tv_nsec :
1000000000 - tsp->tv_nsec);
}
}
void
uidname(int uid)
{
const char *name;
if (uid == -1)
printf("-1");
else {
printf("%u<", (unsigned)uid);
if (uid > UID_MAX || (name = user_from_uid(uid, 1)) == NULL)
printf("unknown>");
else
printf("\"%s\">", name);
}
}
void
gidname(int gid)
{
const char *name;
if (gid == -1)
printf("-1");
else {
printf("%u<", (unsigned)gid);
if (gid > GID_MAX || (name = group_from_gid(gid, 1)) == NULL)
printf("unknown>");
else
printf("\"%s\">", name);
}
}
static void
ktrstat(const struct stat *statp)
{
char mode[12];
/*
* note: ktrstruct() has already verified that statp points to a
* buffer exactly sizeof(struct stat) bytes long.
*/
printf("struct stat { ");
strmode(statp->st_mode, mode);
printf("dev=%d, ino=%llu, mode=%s, nlink=%u, uid=",
statp->st_dev, (unsigned long long)statp->st_ino,
mode, statp->st_nlink);
uidname(statp->st_uid);
printf(", gid=");
gidname(statp->st_gid);
printf(", rdev=%d, ", statp->st_rdev);
printf("atime=");
print_timespec(&statp->st_atim, 0);
printf(", mtime=");
print_timespec(&statp->st_mtim, 0);
printf(", ctime=");
print_timespec(&statp->st_ctim, 0);
printf(", size=%lld, blocks=%lld, blksize=%d, flags=0x%x, gen=0x%x",
statp->st_size, statp->st_blocks, statp->st_blksize,
statp->st_flags, statp->st_gen);
printf(" }\n");
}
static void
ktrtimespec(const struct timespec *tsp, int relative)
{
printf("struct timespec { ");
print_timespec(tsp, relative);
printf(" }\n");
}
static void
print_timeval(const struct timeval *tvp, int relative)
{
print_time(tvp->tv_sec, relative, tvp->tv_usec);
if (tvp->tv_usec != 0)
printf(".%06ld", tvp->tv_sec >= 0 ? tvp->tv_usec :
1000000 - tvp->tv_usec);
}
static void
ktrtimeval(const struct timeval *tvp, int relative)
{
printf("struct timeval { ");
print_timeval(tvp, relative);
printf(" }\n");
}
static void
ktrsigaction(const struct sigaction *sa)
{
/*
* note: ktrstruct() has already verified that sa points to a
* buffer exactly sizeof(struct sigaction) bytes long.
*/
/*
* Fuck! Comparison of function pointers on hppa assumes you can
* dereference them if they're plabels! Cast everything to void *
* to suppress that extra logic; sorry folks, the address we report
* here might not match what you see in your executable...
*/
printf("struct sigaction { ");
if ((void *)sa->sa_handler == (void *)SIG_DFL)
printf("handler=SIG_DFL");
else if ((void *)sa->sa_handler == (void *)SIG_IGN)
printf("handler=SIG_IGN");
else if (sa->sa_flags & SA_SIGINFO)
printf("sigaction=%p", (void *)sa->sa_sigaction);
else
printf("handler=%p", (void *)sa->sa_handler);
printf(", mask=");
sigset(sa->sa_mask);
printf(", flags=");
sigactionflagname(sa->sa_flags);
printf(" }\n");
}
static void
print_rlim(rlim_t lim)
{
if (lim == RLIM_INFINITY)
printf("infinite");
else
printf("%llu", (unsigned long long)lim);
}
static void
ktrrlimit(const struct rlimit *limp)
{
printf("struct rlimit { ");
printf("cur=");
print_rlim(limp->rlim_cur);
printf(", max=");
print_rlim(limp->rlim_max);
printf(" }\n");
}
static void
ktrtfork(const struct __tfork *tf)
{
printf("struct __tfork { tcb=%p, tid=%p, stack=%p }\n",
tf->tf_tcb, (void *)tf->tf_tid, tf->tf_stack);
}
static void
ktrfds(const char *data, size_t count)
{
size_t i;
int fd;
printf("int");
if (count > 1)
printf(" [%zu] { ", count);
for (i = 0; i < count; i++) {
memcpy(&fd, &data[i * sizeof(fd)], sizeof(fd));
printf("%d%s", fd, i < count - 1 ? ", " : "");
}
if (count > 1)
printf(" }");
printf("\n");
}
static void
ktrfdset(struct fd_set *fds, int len)
{
int nfds, i, start = -1;
char sep = ' ';
nfds = len * NBBY;
printf("struct fd_set {");
for (i = 0; i <= nfds; i++)
if (i != nfds && FD_ISSET(i, fds)) {
if (start == -1)
start = i;
} else if (start != -1) {
putchar(sep);
if (start == i - 1)
printf("%d", start);
else if (start == i - 2)
printf("%d,%d", start, i - 1);
else
printf("%d-%d", start, i - 1);
sep = ',';
start = -1;
}
printf(" }\n");
}
static void
ktrrusage(const struct rusage *rup)
{
printf("struct rusage { utime=");
print_timeval(&rup->ru_utime, 1);
printf(", stime=");
print_timeval(&rup->ru_stime, 1);
printf(", maxrss=%ld, ixrss=%ld, idrss=%ld, isrss=%ld,"
" minflt=%ld, majflt=%ld, nswap=%ld, inblock=%ld,"
" oublock=%ld, msgsnd=%ld, msgrcv=%ld, nsignals=%ld,"
" nvcsw=%ld, nivcsw=%ld }\n",
rup->ru_maxrss, rup->ru_ixrss, rup->ru_idrss, rup->ru_isrss,
rup->ru_minflt, rup->ru_majflt, rup->ru_nswap, rup->ru_inblock,
rup->ru_oublock, rup->ru_msgsnd, rup->ru_msgrcv, rup->ru_nsignals,
rup->ru_nvcsw, rup->ru_nivcsw);
}
static void
ktrquota(const struct dqblk *quota)
{
printf("struct dqblk { bhardlimit=%u, bsoftlimit=%u, curblocks=%u,"
" ihardlimit=%u, isoftlimit=%u, curinodes=%u, btime=",
quota->dqb_bhardlimit, quota->dqb_bsoftlimit,
quota->dqb_curblocks, quota->dqb_ihardlimit,
quota->dqb_isoftlimit, quota->dqb_curinodes);
print_time(quota->dqb_btime, 0, 0);
printf(", itime=");
print_time(quota->dqb_itime, 0, 0);
printf(" }\n");
}
static void
ktrmsghdr(const struct msghdr *msg)
{
printf("struct msghdr { name=%p, namelen=%u, iov=%p, iovlen=%u,"
" control=%p, controllen=%u, flags=",
msg->msg_name, msg->msg_namelen, msg->msg_iov, msg->msg_iovlen,
msg->msg_control, msg->msg_controllen);
sendrecvflagsname(msg->msg_flags);
printf(" }\n");
}
static void
ktriovec(const char *data, int count)
{
struct iovec iov;
int i;
printf("struct iovec");
if (count > 1)
printf(" [%d]", count);
for (i = 0; i < count; i++) {
memcpy(&iov, data, sizeof(iov));
data += sizeof(iov);
printf(" { base=%p, len=%lu }", iov.iov_base, iov.iov_len);
}
printf("\n");
}
static void
ktrevent(const char *data, int count)
{
struct kevent kev;
int i;
printf("struct kevent");
if (count > 1)
printf(" [%d]", count);
for (i = 0; i < count; i++) {
memcpy(&kev, data, sizeof(kev));
data += sizeof(kev);
printf(" { ident=%lu, filter=", kev.ident);
evfiltername(kev.filter);
printf(", flags=");
evflagsname(kev.flags);
printf(", fflags=");
evfflagsname(kev.filter, kev.fflags);
printf(", data=%llu", kev.data);
if ((kev.flags & EV_ERROR) && fancy) {
printf("<\"%s\">", strerror(kev.data));
}
printf(", udata=%p }", kev.udata);
}
printf("\n");
}
static void
ktrpollfd(const char *data, int count)
{
struct pollfd pfd;
int i;
printf("struct pollfd");
if (count > 1)
printf(" [%d]", count);
for (i = 0; i < count; i++) {
memcpy(&pfd, data, sizeof(pfd));
data += sizeof(pfd);
printf(" { fd=%d, events=", pfd.fd);
pollfdeventname(pfd.events);
printf(", revents=");
pollfdeventname(pfd.revents);
printf(" }");
}
printf("\n");
}
static void
ktrcmsghdr(char *data, socklen_t len)
{
struct msghdr msg;
struct cmsghdr *cmsg;
int i, count, *fds;
msg.msg_control = data;
msg.msg_controllen = len;
/* count the control messages */
count = 0;
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(&msg, cmsg)) {
count++;
}
printf("struct cmsghdr");
if (count > 1)
printf(" [%d]", count);
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(&msg, cmsg)) {
printf(" { len=%u, level=", cmsg->cmsg_len);
if (cmsg->cmsg_level == SOL_SOCKET) {
printf("SOL_SOCKET, type=");
switch (cmsg->cmsg_type) {
case SCM_RIGHTS:
printf("SCM_RIGHTS, data=");
fds = (int *)CMSG_DATA(cmsg);
for (i = 0;
cmsg->cmsg_len > CMSG_LEN(sizeof(int) * i)
&& (char *)fds + (i + 1) * sizeof(int) <=
data + len;
i++) {
printf("%s%d", i ? "," : "", fds[i]);
}
break;
case SCM_TIMESTAMP:
default:
printf("%d", cmsg->cmsg_type);
break;
}
} else {
struct protoent *p = getprotobynumber(cmsg->cmsg_level);
printf("%u<%s>, type=%d", cmsg->cmsg_level,
p != NULL ? p->p_name : "unknown", cmsg->cmsg_type);
}
printf(" }");
}
printf("\n");
}
static void
ktrflock(const struct flock *fl)
{
printf("struct flock { start=%lld, len=%lld, pid=%d, type=",
fl->l_start, fl->l_len, fl->l_pid);
flocktypename(fl->l_type);
printf(", whence=");
whencename(fl->l_whence);
printf(" }\n");
}
void
ktrstruct(char *buf, size_t buflen)
{
char *name, *data;
size_t namelen, datalen;
int i;
for (name = buf, namelen = 0; namelen < buflen && name[namelen] != '\0';
++namelen)
/* nothing */;
if (namelen == buflen)
goto invalid;
if (name[namelen] != '\0')
goto invalid;
data = buf + namelen + 1;
datalen = buflen - namelen - 1;
/* sanity check */
for (i = 0; i < namelen; ++i)
if (!isalpha((unsigned char)name[i]))
goto invalid;
if (strcmp(name, "stat") == 0) {
struct stat sb;
if (datalen != sizeof(struct stat))
goto invalid;
memcpy(&sb, data, datalen);
ktrstat(&sb);
} else if (strcmp(name, "sockaddr") == 0) {
struct sockaddr_storage ss;
if (datalen > sizeof(ss))
goto invalid;
if (datalen < offsetof(struct sockaddr_storage, ss_len) +
sizeof(ss.ss_len))
goto invalid;
memcpy(&ss, data, datalen);
if ((ss.ss_family != AF_UNIX &&
datalen < sizeof(struct sockaddr)) || datalen != ss.ss_len)
goto invalid;
ktrsockaddr((struct sockaddr *)&ss);
} else if (strcmp(name, "abstimespec") == 0 ||
strcmp(name, "reltimespec") == 0) {
struct timespec ts;
if (datalen != sizeof(ts))
goto invalid;
memcpy(&ts, data, datalen);
ktrtimespec(&ts, name[0] == 'r');
} else if (strcmp(name, "abstimeval") == 0 ||
strcmp(name, "reltimeval") == 0) {
struct timeval tv;
if (datalen != sizeof(tv))
goto invalid;
memcpy(&tv, data, datalen);
ktrtimeval(&tv, name[0] == 'r');
} else if (strcmp(name, "sigaction") == 0) {
struct sigaction sa;
if (datalen != sizeof(sa))
goto invalid;
memcpy(&sa, data, datalen);
ktrsigaction(&sa);
} else if (strcmp(name, "rlimit") == 0) {
struct rlimit lim;
if (datalen != sizeof(lim))
goto invalid;
memcpy(&lim, data, datalen);
ktrrlimit(&lim);
} else if (strcmp(name, "rusage") == 0) {
struct rusage ru;
if (datalen != sizeof(ru))
goto invalid;
memcpy(&ru, data, datalen);
ktrrusage(&ru);
} else if (strcmp(name, "tfork") == 0) {
struct __tfork tf;
if (datalen != sizeof(tf))
goto invalid;
memcpy(&tf, data, datalen);
ktrtfork(&tf);
} else if (strcmp(name, "fds") == 0) {
if (datalen % sizeof(int))
goto invalid;
ktrfds(data, datalen / sizeof(int));
} else if (strcmp(name, "fdset") == 0) {
struct fd_set *fds;
if ((fds = malloc(datalen)) == NULL)
err(1, "malloc");
memcpy(fds, data, datalen);
ktrfdset(fds, datalen);
free(fds);
} else if (strcmp(name, "quota") == 0) {
struct dqblk quota;
if (datalen != sizeof(quota))
goto invalid;
memcpy("a, data, datalen);
ktrquota("a);
} else if (strcmp(name, "msghdr") == 0) {
struct msghdr msg;
if (datalen != sizeof(msg))
goto invalid;
memcpy(&msg, data, datalen);
ktrmsghdr(&msg);
} else if (strcmp(name, "iovec") == 0) {
if (datalen % sizeof(struct iovec))
goto invalid;
ktriovec(data, datalen / sizeof(struct iovec));
} else if (strcmp(name, "kevent") == 0) {
if (datalen % sizeof(struct kevent))
goto invalid;
ktrevent(data, datalen / sizeof(struct kevent));
} else if (strcmp(name, "pollfd") == 0) {
if (datalen % sizeof(struct pollfd))
goto invalid;
ktrpollfd(data, datalen / sizeof(struct pollfd));
} else if (strcmp(name, "cmsghdr") == 0) {
char *cmsg;
if (datalen == 0)
goto invalid;
if ((cmsg = malloc(datalen)) == NULL)
err(1, "malloc");
memcpy(cmsg, data, datalen);
ktrcmsghdr(cmsg, datalen);
free(cmsg);
} else if (strcmp(name, "pledgereq") == 0) {
printf("promise=");
showbufc(basecol + sizeof("promise=") - 1,
(unsigned char *)data, datalen, VIS_DQ | VIS_TAB | VIS_NL);
} else if (strcmp(name, "pledgeexecreq") == 0) {
printf("execpromise=");
showbufc(basecol + sizeof("execpromise=") - 1,
(unsigned char *)data, datalen, VIS_DQ | VIS_TAB | VIS_NL);
} else if (strcmp(name, "unveil") == 0) {
printf("flags=");
showbufc(basecol + sizeof("flags=") - 1,
(unsigned char *)data, datalen, VIS_DQ | VIS_TAB | VIS_NL);
} else if (strcmp(name, "flock") == 0) {
struct flock fl;
if (datalen != sizeof(fl))
goto invalid;
memcpy(&fl, data, datalen);
ktrflock(&fl);
} else {
printf("unknown structure %s\n", name);
}
return;
invalid:
printf("invalid record\n");
}