Dmitry V. Levin
657b04b83b
As the last argument of getsockopt syscall has read-write semantics, print both user and kernel values when they differ. * net.c (SYS_FUNC(getsockopt)): On entering syscall, fetch and save the length specified to the kernel. On error, print the length saved on entering. When the saved length and the length returned by the kernel differ, print both values. * NEWS: Mention this. * tests/net-icmp_filter.c (main): Update expected output.
86 lines
3.4 KiB
C
86 lines
3.4 KiB
C
/*
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* Check decoding of ICMP_FILTER.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2016-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <stdio.h>
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#include <sys/socket.h>
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#include <linux/icmp.h>
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int
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main(void)
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{
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getsockopt(-1, SOL_RAW, ICMP_FILTER, 0, 0);
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printf("getsockopt(-1, SOL_RAW, ICMP_FILTER, NULL, NULL) = -1 %s (%m)\n",
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errno2name());
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setsockopt(-1, SOL_RAW, ICMP_FILTER, NULL, 0);
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printf("setsockopt(-1, SOL_RAW, ICMP_FILTER, NULL, 0) = -1 %s (%m)\n",
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errno2name());
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TAIL_ALLOC_OBJECT_CONST_PTR(socklen_t, plen);
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void *const efault = plen + 1;
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TAIL_ALLOC_OBJECT_CONST_PTR(struct icmp_filter, f);
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getsockopt(-1, SOL_RAW, ICMP_FILTER, f, plen);
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printf("getsockopt(-1, SOL_RAW, ICMP_FILTER, %p, [%d]) = -1 %s (%m)\n",
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f, *plen, errno2name());
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setsockopt(-1, SOL_RAW, ICMP_FILTER, efault, sizeof(*f));
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printf("setsockopt(-1, SOL_RAW, ICMP_FILTER, %p, %u) = -1 %s (%m)\n",
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efault, (unsigned) sizeof(*f), errno2name());
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f->data = ~(
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1<<ICMP_ECHOREPLY |
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1<<ICMP_DEST_UNREACH |
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1<<ICMP_SOURCE_QUENCH |
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1<<ICMP_REDIRECT |
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1<<ICMP_TIME_EXCEEDED |
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1<<ICMP_PARAMETERPROB);
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setsockopt(-1, SOL_RAW, ICMP_FILTER, f, -2);
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printf("setsockopt(-1, SOL_RAW, ICMP_FILTER, %p, -2) = -1 %s (%m)\n",
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f, errno2name());
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setsockopt(-1, SOL_RAW, ICMP_FILTER, f, sizeof(*f));
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printf("setsockopt(-1, SOL_RAW, ICMP_FILTER, %s, %u) = -1 %s (%m)\n",
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"~(1<<ICMP_ECHOREPLY|1<<ICMP_DEST_UNREACH|1<<ICMP_SOURCE_QUENCH"
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"|1<<ICMP_REDIRECT|1<<ICMP_TIME_EXCEEDED|1<<ICMP_PARAMETERPROB)",
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(unsigned) sizeof(*f), errno2name());
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setsockopt(-1, SOL_RAW, ICMP_FILTER, f, sizeof(*f) * 2);
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printf("setsockopt(-1, SOL_RAW, ICMP_FILTER, %s, %u) = -1 %s (%m)\n",
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"~(1<<ICMP_ECHOREPLY|1<<ICMP_DEST_UNREACH|1<<ICMP_SOURCE_QUENCH"
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"|1<<ICMP_REDIRECT|1<<ICMP_TIME_EXCEEDED|1<<ICMP_PARAMETERPROB)",
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(unsigned) sizeof(*f) * 2, errno2name());
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puts("+++ exited with 0 +++");
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return 0;
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}
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