strace/tests/mmsg.c
Dmitry V. Levin d44707d889 Fix dumping of recvmmsg syscall in case of short read
* net.c (dumpiov_in_mmsghdr): Call dumpiov_upto instead of dumpiov,
pass data size limit to dumpiov_upto.
* NEWS: Mention this fix.
* tests/mmsg.c (main): Update.
2016-01-20 17:36:41 +00:00

244 lines
7.0 KiB
C

/*
* Copyright (c) 2014 Masatake YAMATO <yamato@redhat.com>
* Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
* 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 "tests.h"
# include <sys/syscall.h>
#if (defined __NR_sendmmsg || defined HAVE_SENDMMSG) \
&& (defined __NR_recvmmsg || defined HAVE_RECVMMSG)
# include <assert.h>
# include <errno.h>
# include <stdio.h>
# include <unistd.h>
# include <sys/socket.h>
# ifndef HAVE_STRUCT_MMSGHDR
struct mmsghdr {
struct msghdr msg_hdr;
unsigned msg_len;
};
# endif
static int
send_mmsg(int fd, struct mmsghdr *vec, unsigned int vlen, unsigned int flags)
{
int rc;
#ifdef __NR_sendmmsg
rc = syscall(__NR_sendmmsg, (long) fd, vec, (unsigned long) vlen,
(unsigned long) flags);
if (rc >= 0 || ENOSYS != errno)
return rc;
tprintf("sendmmsg(%d, %p, %u, MSG_DONTROUTE|MSG_NOSIGNAL)"
" = -1 ENOSYS (%m)\n", fd, vec, vlen);
#endif
#ifdef HAVE_SENDMMSG
rc = sendmmsg(fd, vec, vlen, flags);
#endif
return rc;
}
static int
recv_mmsg(int fd, struct mmsghdr *vec, unsigned int vlen, unsigned int flags,
struct timespec *timeout)
{
int rc;
#ifdef __NR_recvmmsg
rc = syscall(__NR_recvmmsg, (long) fd, vec, (unsigned long) vlen,
(unsigned long) flags, timeout);
if (rc >= 0 || ENOSYS != errno)
return rc;
tprintf("recvmmsg(%d, %p, %u, MSG_DONTWAIT, NULL)"
" = -1 ENOSYS (%m)\n", fd, vec, vlen);
#endif
#ifdef HAVE_RECVMMSG
rc = recvmmsg(fd, vec, vlen, flags, timeout);
#endif
return rc;
}
int
main(void)
{
tprintf("%s", "");
int fds[2];
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, fds))
perror_msg_and_skip("socketpair");
assert(0 == fds[0]);
assert(1 == fds[1]);
static const char w0_c[] = "012";
const char *w0_d = hexdump_strdup(w0_c);
void *w0 = tail_memdup(w0_c, LENGTH_OF(w0_c));
static const char w1_c[] = "34567";
const char *w1_d = hexdump_strdup(w1_c);
void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c));
static const char w2_c[] = "89abcde";
const char *w2_d = hexdump_strdup(w2_c);
void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c));
const struct iovec w0_iov_[] = {
{
.iov_base = w0,
.iov_len = LENGTH_OF(w0_c)
}, {
.iov_base = w1,
.iov_len = LENGTH_OF(w1_c)
}
};
struct iovec *w0_iov = tail_memdup(w0_iov_, sizeof(w0_iov_));
const struct iovec w1_iov_[] = {
{
.iov_base = w2,
.iov_len = LENGTH_OF(w2_c)
}
};
struct iovec *w1_iov = tail_memdup(w1_iov_, sizeof(w1_iov_));
const struct mmsghdr w_mmh_[] = {
{
.msg_hdr = {
.msg_iov = w0_iov,
.msg_iovlen = ARRAY_SIZE(w0_iov_),
}
}, {
.msg_hdr = {
.msg_iov = w1_iov,
.msg_iovlen = ARRAY_SIZE(w1_iov_),
}
}
};
void *w_mmh = tail_memdup(w_mmh_, sizeof(w_mmh_));
const unsigned int n_w_mmh = ARRAY_SIZE(w_mmh_);
int r = send_mmsg(1, w_mmh, n_w_mmh, MSG_DONTROUTE | MSG_NOSIGNAL);
if (r < 0 && errno == ENOSYS)
perror_msg_and_skip("sendmmsg");
assert(r == (int) n_w_mmh);
assert(close(1) == 0);
tprintf("sendmmsg(1, {{{msg_name(0)=NULL, msg_iov(%u)=[{\"%s\", %u}"
", {\"%s\", %u}], msg_controllen=0, msg_flags=0}, %u}"
", {{msg_name(0)=NULL, msg_iov(%u)=[{\"%s\", %u}]"
", msg_controllen=0, msg_flags=0}, %u}}, %u"
", MSG_DONTROUTE|MSG_NOSIGNAL) = %d\n"
" = %u buffers in vector 0\n"
" * %u bytes in buffer 0\n"
" | 00000 %-49s %-16s |\n"
" * %u bytes in buffer 1\n"
" | 00000 %-49s %-16s |\n"
" = %u buffers in vector 1\n"
" * %u bytes in buffer 0\n"
" | 00000 %-49s %-16s |\n",
ARRAY_SIZE(w0_iov_), w0_c, LENGTH_OF(w0_c),
w1_c, LENGTH_OF(w1_c),
LENGTH_OF(w0_c) + LENGTH_OF(w1_c),
ARRAY_SIZE(w1_iov_), w2_c, LENGTH_OF(w2_c), LENGTH_OF(w2_c),
n_w_mmh, r,
ARRAY_SIZE(w0_iov_), LENGTH_OF(w0_c), w0_d, w0_c,
LENGTH_OF(w1_c), w1_d, w1_c,
ARRAY_SIZE(w1_iov_), LENGTH_OF(w2_c), w2_d, w2_c);
const unsigned int w_len =
LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c);
const unsigned int r_len = (w_len + 1) / 2;
void *r0 = tail_alloc(r_len);
void *r1 = tail_alloc(r_len);
void *r2 = tail_alloc(r_len);
const struct iovec r0_iov_[] = {
{
.iov_base = r0,
.iov_len = r_len
}
};
struct iovec *r0_iov = tail_memdup(r0_iov_, sizeof(r0_iov_));
const struct iovec r1_iov_[] = {
{
.iov_base = r1,
.iov_len = r_len
},
{
.iov_base = r2,
.iov_len = r_len
}
};
struct iovec *r1_iov = tail_memdup(r1_iov_, sizeof(r1_iov_));
const struct mmsghdr r_mmh_[] = {
{
.msg_hdr = {
.msg_iov = r0_iov,
.msg_iovlen = ARRAY_SIZE(r0_iov_),
}
}, {
.msg_hdr = {
.msg_iov = r1_iov,
.msg_iovlen = ARRAY_SIZE(r1_iov_),
}
}
};
void *r_mmh = tail_memdup(r_mmh_, sizeof(r_mmh_));
const unsigned int n_r_mmh = ARRAY_SIZE(r_mmh_);
static const char r0_c[] = "01234567";
const char *r0_d = hexdump_strdup(r0_c);
static const char r1_c[] = "89abcde";
const char *r1_d = hexdump_strdup(r1_c);
assert(recv_mmsg(0, r_mmh, n_r_mmh, MSG_DONTWAIT, NULL) == (int) n_r_mmh);
assert(close(0) == 0);
tprintf("recvmmsg(0, {{{msg_name(0)=NULL, msg_iov(%u)=[{\"%s\", %u}]"
", msg_controllen=0, msg_flags=0}, %u}"
", {{msg_name(0)=NULL, msg_iov(%u)=[{\"%s\", %u}, {\"\", %u}]"
", msg_controllen=0, msg_flags=0}, %u}}, %u"
", MSG_DONTWAIT, NULL) = %d (left NULL)\n"
" = %u buffers in vector 0\n"
" * %u bytes in buffer 0\n"
" | 00000 %-49s %-16s |\n"
" = %u buffers in vector 1\n"
" * %u bytes in buffer 0\n"
" | 00000 %-49s %-16s |\n",
ARRAY_SIZE(r0_iov_), r0_c, r_len, LENGTH_OF(r0_c),
ARRAY_SIZE(r1_iov_), r1_c, r_len, r_len, LENGTH_OF(r1_c),
n_r_mmh, r,
ARRAY_SIZE(r0_iov_), LENGTH_OF(r0_c), r0_d, r0_c,
ARRAY_SIZE(r1_iov_), LENGTH_OF(r1_c), r1_d, r1_c);
tprintf("+++ exited with 0 +++\n");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("(__NR_sendmmsg || HAVE_SENDMMSG) && (__NR_recvmmsg || HAVE_RECVMMSG)")
#endif