1d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes/* 2d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Check decoding of recvmsg and sendmsg syscalls. 3d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 4d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org> 577c3ff8e0644f1e120e4b2ebc7222150b0446f3bElliott Hughes * Copyright (c) 2016-2017 The strace developers. 6d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * All rights reserved. 7d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 8d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Redistribution and use in source and binary forms, with or without 9d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * modification, are permitted provided that the following conditions 10d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * are met: 11d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 1. Redistributions of source code must retain the above copyright 12d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer. 13d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright 14d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer in the 15d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * documentation and/or other materials provided with the distribution. 16d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 3. The name of the author may not be used to endorse or promote products 17d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * derived from this software without specific prior written permission. 18d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 19d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes */ 30d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 31d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include "tests.h" 32d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 33d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <assert.h> 34d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <stdio.h> 35d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <unistd.h> 36d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <sys/socket.h> 37d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <sys/uio.h> 38d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 39d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesint 40d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesmain(void) 41d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 42d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes tprintf("%s", ""); 43d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 44d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes int fds[2]; 45d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds)) 46d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes perror_msg_and_skip("socketpair"); 47d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(0 == fds[0]); 48d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(1 == fds[1]); 49d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 50d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const char w0_c[] = "012"; 51d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const char *w0_d = hexdump_strdup(w0_c); 52d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes void *w0 = tail_memdup(w0_c, LENGTH_OF(w0_c)); 53d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 54d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const char w1_c[] = "34567"; 55d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const char *w1_d = hexdump_strdup(w1_c); 56d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c)); 57d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 58d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const char w2_c[] = "89abcde"; 59d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const char *w2_d = hexdump_strdup(w2_c); 60d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c)); 61d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 62d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const char r0_c[] = "01234567"; 63d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const char *r0_d = hexdump_strdup(r0_c); 64d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const char r1_c[] = "89abcde"; 65d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const char *r1_d = hexdump_strdup(r1_c); 66d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 67d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const struct iovec w_iov_[] = { 68d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes { 69d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_base = w0, 70d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_len = LENGTH_OF(w0_c) 71d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }, { 72d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_base = w1, 73d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_len = LENGTH_OF(w1_c) 74d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }, { 75d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_base = w2, 76d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_len = LENGTH_OF(w2_c) 77d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } 78d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }; 79d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes struct iovec *w_iov = tail_memdup(w_iov_, sizeof(w_iov_)); 80d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const unsigned int w_len = 81d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c); 82d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 83d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const struct msghdr w_mh_ = { 84d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .msg_iov = w_iov, 85d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .msg_iovlen = ARRAY_SIZE(w_iov_) 86d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }; 87d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const struct msghdr *w_mh = tail_memdup(&w_mh_, sizeof(w_mh_)); 88d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 89d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(sendmsg(1, w_mh, 0) == (int) w_len); 90d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes close(1); 91d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes tprintf("sendmsg(1, {msg_name=NULL, msg_namelen=0, msg_iov=" 92d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes "[{iov_base=\"%s\", iov_len=%u}, {iov_base=\"%s\", iov_len=%u}" 93d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes ", {iov_base=\"%s\", iov_len=%u}], msg_iovlen=%u" 94d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes ", msg_controllen=0, msg_flags=0}, 0) = %u\n" 95d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " * %u bytes in buffer 0\n" 96d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " | 00000 %-49s %-16s |\n" 97d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " * %u bytes in buffer 1\n" 98d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " | 00000 %-49s %-16s |\n" 99d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " * %u bytes in buffer 2\n" 100d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " | 00000 %-49s %-16s |\n", 101d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes w0_c, LENGTH_OF(w0_c), 102d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes w1_c, LENGTH_OF(w1_c), 103d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes w2_c, LENGTH_OF(w2_c), 104dc75b01004a0588c1eb3bc26d7248a6e473b2cddElliott Hughes (unsigned int) ARRAY_SIZE(w_iov_), w_len, 105d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes LENGTH_OF(w0_c), w0_d, w0_c, 106d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes LENGTH_OF(w1_c), w1_d, w1_c, 107d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes LENGTH_OF(w2_c), w2_d, w2_c); 108d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 109d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const unsigned int r_len = (w_len + 1) / 2; 110d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes void *r0 = tail_alloc(r_len); 111d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const struct iovec r0_iov_[] = { 112d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes { 113d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_base = r0, 114d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_len = r_len 115d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } 116d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }; 117d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes struct iovec *r_iov = tail_memdup(r0_iov_, sizeof(r0_iov_)); 118d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 119d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const struct msghdr r_mh_ = { 120d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .msg_iov = r_iov, 121d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .msg_iovlen = ARRAY_SIZE(r0_iov_) 122d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }; 123d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes struct msghdr *r_mh = tail_memdup(&r_mh_, sizeof(r_mh_)); 124d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 125d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(recvmsg(0, r_mh, 0) == (int) r_len); 126d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes tprintf("recvmsg(0, {msg_name=NULL, msg_namelen=0, msg_iov=" 127d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes "[{iov_base=\"%s\", iov_len=%u}], msg_iovlen=%u" 128d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes ", msg_controllen=0, msg_flags=0}, 0) = %u\n" 129d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " * %u bytes in buffer 0\n" 130d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " | 00000 %-49s %-16s |\n", 131dc75b01004a0588c1eb3bc26d7248a6e473b2cddElliott Hughes r0_c, r_len, (unsigned int) ARRAY_SIZE(r0_iov_), 132dc75b01004a0588c1eb3bc26d7248a6e473b2cddElliott Hughes r_len, r_len, r0_d, r0_c); 133d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 134d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes void *r1 = tail_alloc(r_len); 135d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes void *r2 = tail_alloc(w_len); 136d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const struct iovec r1_iov_[] = { 137d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes { 138d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_base = r1, 139d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_len = r_len 140d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }, 141d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes { 142d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_base = r2, 143d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes .iov_len = w_len 144d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } 145d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes }; 146d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes r_iov = tail_memdup(r1_iov_, sizeof(r1_iov_)); 147d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes r_mh->msg_iov = r_iov; 148d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes r_mh->msg_iovlen = ARRAY_SIZE(r1_iov_); 149d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 150d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(recvmsg(0, r_mh, 0) == (int) w_len - (int) r_len); 151d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes tprintf("recvmsg(0, {msg_name=NULL, msg_namelen=0, msg_iov=" 152d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes "[{iov_base=\"%s\", iov_len=%u}, {iov_base=\"\", iov_len=%u}]" 153d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes ", msg_iovlen=%u, msg_controllen=0, msg_flags=0}, 0) = %u\n" 154d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " * %u bytes in buffer 0\n" 155d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes " | 00000 %-49s %-16s |\n", 156dc75b01004a0588c1eb3bc26d7248a6e473b2cddElliott Hughes r1_c, r_len, w_len, (unsigned int) ARRAY_SIZE(r1_iov_), 157dc75b01004a0588c1eb3bc26d7248a6e473b2cddElliott Hughes w_len - r_len, w_len - r_len, r1_d, r1_c); 158d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes close(0); 159d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 160d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes tprintf("+++ exited with 0 +++\n"); 161d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return 0; 162d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 163