test: verify that IP and IPv6 sockets can coexist in the same epoll set

test/test-mixed-socket-types.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "error.h"
+#include "test-util.h"
+#include "wepoll.h"
+#include "win.h"
+
+static void create_and_add_socket(HANDLE epoll_hnd,
+                                  int af,
+                                  int type,
+                                  int protocol) {
+  SOCKET sock;
+  u_long one = 1;
+  int r;
+  struct epoll_event ev;
+
+  sock = socket(af, type, protocol);
+  check(sock != INVALID_SOCKET);
+
+  r = ioctlsocket(sock, FIONBIO, &one);
+  check(r == 0);
+
+  ev.events = EPOLLOUT | EPOLLONESHOT;
+  ev.data.sock = sock;
+  r = epoll_ctl(epoll_hnd, EPOLL_CTL_ADD, sock, &ev);
+  check(r == 0);
+}
+
+int main(void) {
+  HANDLE epoll_hnd;
+  int i, r;
+  struct epoll_event ev;
+
+  epoll_hnd = epoll_create1(0);
+  check(epoll_hnd != NULL);
+
+  create_and_add_socket(epoll_hnd, AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+  create_and_add_socket(epoll_hnd, AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+
+  for (i = 0; i < 2; i++) {
+    r = epoll_wait(epoll_hnd, &ev, 1, -1);
+    check(r == 1);
+
+    r = epoll_ctl(epoll_hnd, EPOLL_CTL_DEL, ev.data.sock, NULL);
+    check(r == 0);
+
+    r = closesocket(ev.data.sock);
+    check(r == 0);
+  }
+
+  r = epoll_close(epoll_hnd);
+  check(r == 0);
+
+  return 0;
+}