Attachment 251601 Details for Bug 279881 – test program

test program

main.c (text/plain), 1.78 KB, created by Andrey V. Elsukov on 2024-06-21 12:36:09 UTC

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Creator: Andrey V. Elsukov

Created: 2024-06-21 12:36:09 UTC

Size: 1.78 KB

patch

obsolete

>#include <sys/types.h>
>#include <sys/socket.h>
>#include <sys/sysctl.h>
>#include <sys/queue.h>
>#include <arpa/inet.h>
>#include <netinet/in.h>
>#include <err.h>
>#include <errno.h>
>#include <stdio.h>
>#include <string.h>
>#include <sysexits.h>
>#include <unistd.h>
>
>#define _debug(fmt, ...) \
>    printf("%s:%u: " fmt, __func__, __LINE__, ## __VA_ARGS__)
>
>
>static int
>test(int opt, const char *ip4)
>{
>	char buf[INET6_ADDRSTRLEN];
>	struct sockaddr_in6 sa;
>	socklen_t sz;
>	int s, ret, val;
>
>	s = socket(AF_INET6, SOCK_DGRAM, 0);
>	if (s < 0 )
>		err(EX_OSERR,"socket()");
>	_debug("socket fd = %d\n", s);
>
>	sz = sizeof(val);
>	ret = getsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &val, &sz);
>	if (ret < 0)
>		err(EX_OSERR,"getsockopt()");
>	_debug("getsockopt(IPV6_V6ONLY) = %d\n", val);
>
>	if (opt != val) {
>		ret = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &opt, sizeof(opt));
>		if (ret < 0)
>			err(EX_OSERR,"setsockopt()");
>		_debug("setsockopt(IPV6_V6ONLY) -> %d\n", opt);
>	}
>
>	memset(&sa, 0, sizeof(sa));
>	sa.sin6_family = AF_INET6;
>	sa.sin6_len = sizeof(sa);
>	sa.sin6_port = htons(53);
>
>	snprintf(buf, sizeof(buf), "::ffff:%s", ip4);
>	ret = inet_pton(AF_INET6, buf, &sa.sin6_addr);
>	if (ret != 1)
>		err(EX_OSERR,"inet_pton(%s)", buf);
>
>	ret = connect(s, (const struct sockaddr *)&sa, sizeof(sa));
>	if (ret < 0)
>		_debug("connect(%s): %s\n", buf, strerror(errno));
>	else
>		_debug("connect(%s) -> %d\n", buf, ret);
>	close(s);
>	_debug("----------\n");
>	return (0);
>}
>
>int
>main(int argc, char *argv[])
>{
>	const char *addr = "10.0.0.2";
>	int i, ret;
>	size_t slen = sizeof(i);
>
>	ret = sysctlbyname("net.inet6.ip6.v6only", &i, &slen, NULL, 0);
>	if (ret < 0)
>		err(EX_OSERR, "sysctlbyname(v6only)");
>	_debug("sysctlbyname(net.inet6.ip6.v6only) = %d\n", i);
>
>	if (argc == 2)
>		addr = argv[1];
>	for (i = 0; i < 2; i++)
>		test(i, addr);
>	return (0);
>}

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Attachments on bug 279881: 251601