105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2016 Cyril Hrubis <chrubis@suse.cz>
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* Copyright (c) 2016 Michal Kubecek <mkubecek@suse.cz>
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*/
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/*
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* This is a regression test for kernel commit:
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*
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* 197c949e7798 udp: properly support MSG_PEEK with truncated buffers
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*
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* NOTE: The testcase will hang on upatched stable kernel.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include "tst_test.h"
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#include "lapi/socket.h"
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static const char msg[] = "Michael Gilfix was here\341\210\264\r\n";
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static const unsigned msglen = ARRAY_SIZE(msg) - 1;
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static unsigned char buff[25];
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static const int bufflen = ARRAY_SIZE(buff);
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static int sdr, sdw;
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static void verify_recvmsg(void)
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{
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struct sockaddr_in6 addr_init = {
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.sin6_family = AF_INET6,
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.sin6_port = htons(0),
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.sin6_addr = IN6ADDR_LOOPBACK_INIT,
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};
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struct sockaddr_in6 addr_r, addr_w, addr_f;
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socklen_t addrlen_r, addrlen_w;
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struct iovec iov = {
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.iov_base = buff,
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.iov_len = sizeof(buff),
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};
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struct msghdr msghdr = {
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.msg_name = &addr_f,
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.msg_namelen = sizeof(addr_f),
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.msg_iov = &iov,
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.msg_iovlen = 1,
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.msg_control = NULL,
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.msg_controllen = 0,
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.msg_flags = 0,
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};
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int R;
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sdr = SAFE_SOCKET(PF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_IP);
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SAFE_BIND(sdr, (struct sockaddr*)&addr_init, sizeof(addr_init));
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addrlen_r = sizeof(addr_r);
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SAFE_GETSOCKNAME(sdr, (struct sockaddr*)&addr_r, &addrlen_r);
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sdw = SAFE_SOCKET(PF_INET6, SOCK_DGRAM|SOCK_CLOEXEC, IPPROTO_IP);
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SAFE_BIND(sdw, (struct sockaddr*)&addr_init, sizeof(addr_init));
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addrlen_w = sizeof(addr_w);
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SAFE_GETSOCKNAME(sdw, (struct sockaddr*)&addr_w, &addrlen_w);
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R = sendto(sdw, msg, msglen, 0, (struct sockaddr*)&addr_r, addrlen_r);
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if (R < 0)
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tst_brk(TBROK | TERRNO, "sendto()");
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R = recvmsg(sdr, &msghdr, MSG_PEEK);
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if (R < 0) {
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tst_res(TFAIL | TERRNO, "recvmsg(..., MSG_PEEK)");
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return;
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}
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tst_res(TINFO, "received %d bytes", R);
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if ((R == bufflen) && !memcmp(msg, buff, R))
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tst_res(TPASS, "recvmsg(..., MSG_PEEK) works fine");
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else
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tst_res(TPASS, "recvmsg(..., MSG_PEEK) failed");
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SAFE_CLOSE(sdw);
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SAFE_CLOSE(sdr);
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}
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static void cleanup(void)
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{
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if (sdw > 0)
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SAFE_CLOSE(sdw);
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if (sdr > 0)
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SAFE_CLOSE(sdr);
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}
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static struct tst_test test = {
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.min_kver = "2.6.27",
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.test_all = verify_recvmsg,
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.cleanup = cleanup,
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.tags = (const struct tst_tag[]) {
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{"linux-git", "197c949e7798"},
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{}
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}
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};
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