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/*
* Check decoding of MCAST_JOIN_GROUP/MCAST_LEAVE_GROUP.
*
* Copyright (c) 2015-2017 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2017-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <net/if.h>
#include <netinet/in.h>
#if defined MCAST_JOIN_GROUP && defined MCAST_LEAVE_GROUP
# include <limits.h>
# include <stdio.h>
# include <unistd.h>
# include <sys/socket.h>
# include <arpa/inet.h>
# define multi4addr "224.0.0.3"
# define multi6addr "ff01::c"
static const char *errstr;
static int
set_opt(const int fd, const int level, const int opt,
const void *const val, const socklen_t len)
{
int rc = setsockopt(fd, level, opt, val, len);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
TAIL_ALLOC_OBJECT_CONST_PTR(struct group_req, greq4);
TAIL_ALLOC_OBJECT_CONST_PTR(struct group_req, greq6);
greq6->gr_interface = greq4->gr_interface = ifindex_lo();
if (!greq4->gr_interface)
perror_msg_and_skip("lo");
greq4->gr_group.ss_family = AF_INET;
inet_pton(AF_INET, multi4addr, &greq4->gr_group.ss_family + 2);
greq6->gr_group.ss_family = AF_INET6;
inet_pton(AF_INET6, multi6addr, &greq6->gr_group.ss_family + 4);
(void) close(0);
if (socket(AF_INET, SOCK_DGRAM, 0))
perror_msg_and_skip("socket");
struct {
const int level;
const char *const str_level;
const int name;
const char *const str_name;
const struct group_req *const val;
const char *const addr;
} opts[] = {
{
ARG_STR(SOL_IP), ARG_STR(MCAST_JOIN_GROUP), greq4,
"gr_group={sa_family=AF_INET, sin_port=htons(65535)"
", sin_addr=inet_addr(\"" multi4addr "\")}"
},
{
ARG_STR(SOL_IP), ARG_STR(MCAST_LEAVE_GROUP), greq4,
"gr_group={sa_family=AF_INET, sin_port=htons(65535)"
", sin_addr=inet_addr(\"" multi4addr "\")}"
},
{
ARG_STR(SOL_IPV6), ARG_STR(MCAST_JOIN_GROUP), greq6,
"gr_group={sa_family=AF_INET6, sin6_port=htons(65535)"
", sin6_flowinfo=htonl(4294967295)"
", inet_pton(AF_INET6, \"" multi6addr "\", &sin6_addr)"
", sin6_scope_id=4294967295}"
},
{
ARG_STR(SOL_IPV6), ARG_STR(MCAST_LEAVE_GROUP), greq6,
"gr_group={sa_family=AF_INET6, sin6_port=htons(65535)"
", sin6_flowinfo=htonl(4294967295)"
", inet_pton(AF_INET6, \"" multi6addr "\", &sin6_addr)"
", sin6_scope_id=4294967295}"
}
};
for (unsigned int i = 0; i < ARRAY_SIZE(opts); ++i) {
/* optlen < 0, EINVAL */
set_opt(0, opts[i].level, opts[i].name, opts[i].val, -1U);
printf("setsockopt(0, %s, %s, %p, -1) = %s\n",
opts[i].str_level, opts[i].str_name,
opts[i].val, errstr);
/* optlen < sizeof(struct group_req), EINVAL */
set_opt(0, opts[i].level, opts[i].name, opts[i].val,
sizeof(*opts[i].val) - 1);
printf("setsockopt(0, %s, %s, %p, %u) = %s\n",
opts[i].str_level, opts[i].str_name,
opts[i].val, (unsigned int) sizeof(*opts[i].val) - 1,
errstr);
/* optval EFAULT */
set_opt(0, opts[i].level, opts[i].name,
(const char *) opts[i].val + 1, sizeof(*opts[i].val));
printf("setsockopt(0, %s, %s, %p, %u) = %s\n",
opts[i].str_level, opts[i].str_name,
(const char *) opts[i].val + 1,
(unsigned int) sizeof(*opts[i].val), errstr);
/* classic */
set_opt(0, opts[i].level, opts[i].name,
opts[i].val, sizeof(*opts[i].val));
printf("setsockopt(0, %s, %s"
", {gr_interface=%s, %s}, %u) = %s\n",
opts[i].str_level, opts[i].str_name,
IFINDEX_LO_STR, opts[i].addr,
(unsigned int) sizeof(*opts[i].val), errstr);
/* optlen > sizeof(struct group_req), shortened */
set_opt(0, opts[i].level, opts[i].name, opts[i].val, INT_MAX);
printf("setsockopt(0, %s, %s"
", {gr_interface=%s, %s}, %u) = %s\n",
opts[i].str_level, opts[i].str_name,
IFINDEX_LO_STR, opts[i].addr,
INT_MAX, errstr);
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("MCAST_JOIN_GROUP && MCAST_LEAVE_GROUP")
#endif
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