You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
245 lines
6.5 KiB
245 lines
6.5 KiB
/*
|
|
* Copyright (c) 2010 Andreas Schwab <schwab@linux-m68k.org>
|
|
* Copyright (c) 2012-2013 Denys Vlasenko <vda.linux@googlemail.com>
|
|
* Copyright (c) 2014 Masatake YAMATO <yamato@redhat.com>
|
|
* Copyright (c) 2010-2016 Dmitry V. Levin <ldv@altlinux.org>
|
|
* Copyright (c) 2016-2018 The strace developers.
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "defs.h"
|
|
#include "msghdr.h"
|
|
#include "xstring.h"
|
|
#include <limits.h>
|
|
|
|
static bool
|
|
fetch_struct_mmsghdr_for_print(struct tcb *const tcp,
|
|
const kernel_ulong_t addr,
|
|
const unsigned int len, void *const mh)
|
|
{
|
|
return (entering(tcp) || !syserror(tcp)) &&
|
|
fetch_struct_mmsghdr(tcp, addr, mh);
|
|
}
|
|
|
|
struct print_struct_mmsghdr_config {
|
|
const int *p_user_msg_namelen;
|
|
unsigned int msg_len_vlen;
|
|
unsigned int count;
|
|
bool use_msg_len;
|
|
};
|
|
|
|
static bool
|
|
print_struct_mmsghdr(struct tcb *tcp, void *elem_buf,
|
|
size_t elem_size, void *data)
|
|
{
|
|
const struct mmsghdr *const mmsg = elem_buf;
|
|
struct print_struct_mmsghdr_config *const c = data;
|
|
|
|
if (!c->count) {
|
|
tprints("...");
|
|
return false;
|
|
}
|
|
--c->count;
|
|
|
|
tprints("{msg_hdr=");
|
|
print_struct_msghdr(tcp, &mmsg->msg_hdr, c->p_user_msg_namelen,
|
|
c->use_msg_len ? mmsg->msg_len : (kernel_ulong_t) -1);
|
|
if (c->msg_len_vlen) {
|
|
tprintf(", msg_len=%u", mmsg->msg_len);
|
|
--c->msg_len_vlen;
|
|
}
|
|
tprints("}");
|
|
|
|
if (c->p_user_msg_namelen)
|
|
++c->p_user_msg_namelen;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
free_mmsgvec_data(void *ptr)
|
|
{
|
|
char **pstr = ptr;
|
|
free(*pstr);
|
|
*pstr = 0;
|
|
|
|
free(ptr);
|
|
}
|
|
|
|
struct mmsgvec_data {
|
|
char *timeout;
|
|
unsigned int count;
|
|
int namelen[IOV_MAX];
|
|
};
|
|
|
|
static void
|
|
save_mmsgvec_namelen(struct tcb *const tcp, kernel_ulong_t addr,
|
|
unsigned int len, const char *const timeout)
|
|
{
|
|
if (len > IOV_MAX)
|
|
len = IOV_MAX;
|
|
|
|
const size_t data_size = offsetof(struct mmsgvec_data, namelen)
|
|
+ sizeof(int) * len;
|
|
struct mmsgvec_data *const data = xmalloc(data_size);
|
|
data->timeout = xstrdup(timeout);
|
|
|
|
unsigned int i, fetched;
|
|
|
|
for (i = 0; i < len; ++i, addr += fetched) {
|
|
struct mmsghdr mh;
|
|
|
|
fetched = fetch_struct_mmsghdr(tcp, addr, &mh);
|
|
if (!fetched)
|
|
break;
|
|
data->namelen[i] = mh.msg_hdr.msg_namelen;
|
|
}
|
|
data->count = i;
|
|
|
|
set_tcb_priv_data(tcp, data, free_mmsgvec_data);
|
|
}
|
|
|
|
static void
|
|
decode_mmsgvec(struct tcb *const tcp, const kernel_ulong_t addr,
|
|
const unsigned int vlen, const unsigned int msg_len_vlen,
|
|
const bool use_msg_len)
|
|
{
|
|
struct mmsghdr mmsg;
|
|
struct print_struct_mmsghdr_config c = {
|
|
.msg_len_vlen = msg_len_vlen,
|
|
.count = IOV_MAX,
|
|
.use_msg_len = use_msg_len
|
|
};
|
|
const struct mmsgvec_data *const data = get_tcb_priv_data(tcp);
|
|
|
|
if (data) {
|
|
if (data->count < c.count)
|
|
c.count = data->count;
|
|
c.p_user_msg_namelen = data->namelen;
|
|
}
|
|
|
|
print_array(tcp, addr, vlen, &mmsg, sizeof_struct_mmsghdr(),
|
|
fetch_struct_mmsghdr_for_print,
|
|
print_struct_mmsghdr, &c);
|
|
}
|
|
|
|
void
|
|
dumpiov_in_mmsghdr(struct tcb *const tcp, kernel_ulong_t addr)
|
|
{
|
|
unsigned int len = tcp->u_rval;
|
|
unsigned int i, fetched;
|
|
struct mmsghdr mmsg;
|
|
|
|
for (i = 0; i < len; ++i, addr += fetched) {
|
|
fetched = fetch_struct_mmsghdr(tcp, addr, &mmsg);
|
|
if (!fetched)
|
|
break;
|
|
tprintf(" = %" PRI_klu " buffers in vector %u\n",
|
|
(kernel_ulong_t) mmsg.msg_hdr.msg_iovlen, i);
|
|
dumpiov_upto(tcp, mmsg.msg_hdr.msg_iovlen,
|
|
ptr_to_kulong(mmsg.msg_hdr.msg_iov),
|
|
mmsg.msg_len);
|
|
}
|
|
}
|
|
|
|
SYS_FUNC(sendmmsg)
|
|
{
|
|
if (entering(tcp)) {
|
|
/* sockfd */
|
|
printfd(tcp, tcp->u_arg[0]);
|
|
tprints(", ");
|
|
if (!verbose(tcp)) {
|
|
/* msgvec */
|
|
printaddr(tcp->u_arg[1]);
|
|
/* vlen */
|
|
tprintf(", %u, ", (unsigned int) tcp->u_arg[2]);
|
|
/* flags */
|
|
printflags(msg_flags, tcp->u_arg[3], "MSG_???");
|
|
return RVAL_DECODED;
|
|
}
|
|
} else {
|
|
const unsigned int msg_len_vlen =
|
|
syserror(tcp) ? 0 : tcp->u_rval;
|
|
/* msgvec */
|
|
temporarily_clear_syserror(tcp);
|
|
decode_mmsgvec(tcp, tcp->u_arg[1], tcp->u_arg[2],
|
|
msg_len_vlen, false);
|
|
restore_cleared_syserror(tcp);
|
|
/* vlen */
|
|
tprintf(", %u, ", (unsigned int) tcp->u_arg[2]);
|
|
/* flags */
|
|
printflags(msg_flags, tcp->u_arg[3], "MSG_???");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
SYS_FUNC(recvmmsg)
|
|
{
|
|
if (entering(tcp)) {
|
|
printfd(tcp, tcp->u_arg[0]);
|
|
tprints(", ");
|
|
if (verbose(tcp)) {
|
|
save_mmsgvec_namelen(tcp, tcp->u_arg[1], tcp->u_arg[2],
|
|
sprint_timespec(tcp, tcp->u_arg[4]));
|
|
} else {
|
|
/* msgvec */
|
|
printaddr(tcp->u_arg[1]);
|
|
/* vlen */
|
|
tprintf(", %u, ", (unsigned int) tcp->u_arg[2]);
|
|
/* flags */
|
|
printflags(msg_flags, tcp->u_arg[3], "MSG_???");
|
|
tprints(", ");
|
|
print_timespec(tcp, tcp->u_arg[4]);
|
|
}
|
|
return 0;
|
|
} else {
|
|
if (verbose(tcp)) {
|
|
/* msgvec */
|
|
decode_mmsgvec(tcp, tcp->u_arg[1], tcp->u_rval,
|
|
tcp->u_rval, true);
|
|
/* vlen */
|
|
tprintf(", %u, ", (unsigned int) tcp->u_arg[2]);
|
|
/* flags */
|
|
printflags(msg_flags, tcp->u_arg[3], "MSG_???");
|
|
tprints(", ");
|
|
/* timeout on entrance */
|
|
tprints(*(const char **) get_tcb_priv_data(tcp));
|
|
}
|
|
if (syserror(tcp))
|
|
return 0;
|
|
if (tcp->u_rval == 0) {
|
|
tcp->auxstr = "Timeout";
|
|
return RVAL_STR;
|
|
}
|
|
if (!verbose(tcp) || !tcp->u_arg[4])
|
|
return 0;
|
|
/* timeout on exit */
|
|
static char str[sizeof("left") + TIMESPEC_TEXT_BUFSIZE];
|
|
xsprintf(str, "left %s", sprint_timespec(tcp, tcp->u_arg[4]));
|
|
tcp->auxstr = str;
|
|
return RVAL_STR;
|
|
}
|
|
}
|