63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <arpa/inet.h>
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#include <error.h>
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#include <errno.h>
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#include <unistd.h>
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int main(void)
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{
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int fd1, fd2, one = 1;
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struct sockaddr_in6 bind_addr = {
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.sin6_family = AF_INET6,
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.sin6_port = htons(20000),
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.sin6_flowinfo = htonl(0),
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.sin6_addr = {},
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.sin6_scope_id = 0,
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};
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inet_pton(AF_INET6, "::", &bind_addr.sin6_addr);
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fd1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
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if (fd1 < 0) {
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error(1, errno, "socket fd1");
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return -1;
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}
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if (setsockopt(fd1, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
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error(1, errno, "setsockopt(SO_REUSEADDR) fd1");
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goto out_err1;
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}
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if (bind(fd1, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
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error(1, errno, "bind fd1");
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goto out_err1;
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}
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if (listen(fd1, 0)) {
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error(1, errno, "listen");
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goto out_err1;
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}
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fd2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
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if (fd2 < 0) {
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error(1, errno, "socket fd2");
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goto out_err1;
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}
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if (connect(fd2, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
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error(1, errno, "bind fd2");
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goto out_err2;
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}
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close(fd2);
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close(fd1);
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return 0;
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out_err2:
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close(fd2);
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out_err1:
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close(fd1);
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return -1;
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}
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