tools/testing/selftests/net/sk_connect_zero_addr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <arpa/inet.h>
   4 #include <error.h>
   5 #include <errno.h>
   6 #include <unistd.h>
   7
   8 int main(void)
   9 {
  10         int fd1, fd2, one = 1;
  11         struct sockaddr_in6 bind_addr = {
  12                 .sin6_family = AF_INET6,
  13                 .sin6_port = htons(20000),
  14                 .sin6_flowinfo = htonl(0),
  15                 .sin6_addr = {},
  16                 .sin6_scope_id = 0,
  17         };
  18
  19         inet_pton(AF_INET6, "::", &bind_addr.sin6_addr);
  20
  21         fd1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
  22         if (fd1 < 0) {
  23                 error(1, errno, "socket fd1");
  24                 return -1;
  25         }
  26
  27         if (setsockopt(fd1, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
  28                 error(1, errno, "setsockopt(SO_REUSEADDR) fd1");
  29                 goto out_err1;
  30         }
  31
  32         if (bind(fd1, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
  33                 error(1, errno, "bind fd1");
  34                 goto out_err1;
  35         }
  36
  37         if (listen(fd1, 0)) {
  38                 error(1, errno, "listen");
  39                 goto out_err1;
  40         }
  41
  42         fd2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
  43         if (fd2 < 0) {
  44                 error(1, errno, "socket fd2");
  45                 goto out_err1;
  46         }
  47
  48         if (connect(fd2, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
  49                 error(1, errno, "bind fd2");
  50                 goto out_err2;
  51         }
  52
  53         close(fd2);
  54         close(fd1);
  55         return 0;
  56
  57 out_err2:
  58         close(fd2);
  59 out_err1:
  60         close(fd1);
  61         return -1;
  62 }