Remove address reuse from windows target (not supported by the dependency)

lib/virtual-net/src/host.rs

@@ -115,6 +115,7 @@ impl VirtualNetworking for LocalNetworking {
             }
         }
 
+        #[cfg(not(windows))]
         let socket = {
             let std_sock =
                 Socket::new(Domain::IPV4, Type::DGRAM, None).map_err(io_err_into_net_error)?;
@@ -127,6 +128,8 @@ impl VirtualNetworking for LocalNetworking {
             std_sock.bind(&addr.into()).map_err(io_err_into_net_error)?;
             mio::net::UdpSocket::from_std(std_sock.into())
         };
+        #[cfg(windows)]
+        let socket = mio::net::UdpSocket::bind(addr).map_err(io_err_into_net_error)?;
 
         #[allow(unused_mut)]
         let mut ret = LocalUdpSocket {

tests/wasix/udp-addr-reuse/main.c

@@ -0,0 +1,83 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/*
+this is an exemple of address reuse using UDP sockets
+it set address reuse option to 1 and then bind to the same address
+it set port reuse option to 1 and then bind to the same port
+*/
+//#ifndef SO_REUSEPORT
+//#define SO_REUSEPORT 15
+//#endif
+
+
+int main(int argc, char *argv[])
+{
+    int sock1, sock2;
+    int reuse = 1;
+    struct sockaddr_in addr;
+
+    sock1 = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sock1 < 0)
+    {
+        perror("socket");
+        return EXIT_FAILURE;
+    }
+
+    if (setsockopt(sock1, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0)
+    {
+        perror("setsockopt first socket SO_REUSEADDR failed");
+        return EXIT_FAILURE;
+    }
+
+    if (setsockopt(sock1, SOL_SOCKET, SO_REUSEPORT, &reuse, sizeof(reuse)) < 0)
+    {
+        perror("setsockopt first socket SO_REUSEPORT failed");
+        return EXIT_FAILURE;
+    }
+
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(12345);
+    addr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    if (bind(sock1, (struct sockaddr *)&addr, sizeof(addr)) < 0)
+    {
+        perror("first socket bind failed");
+        return EXIT_FAILURE;
+    }
+
+    sock2 = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sock2 < 0)
+    {
+        perror("socket");
+        return EXIT_FAILURE;
+    }
+
+    if (setsockopt(sock2, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0)
+    {
+        perror("setsockopt second socket SO_REUSEADDR failed");
+        return EXIT_FAILURE;
+    }
+
+    if (setsockopt(sock2, SOL_SOCKET, SO_REUSEPORT, &reuse, sizeof(reuse)) < 0)
+    {
+        perror("setsockopt second socket SO_REUSEPORT failed");
+        return EXIT_FAILURE;
+    }
+
+    if (bind(sock2, (struct sockaddr *)&addr, sizeof(addr)) < 0)
+    {
+        perror("second socket bind failed");
+        return EXIT_FAILURE;
+    }
+
+    close(sock1);
+    close(sock2);
+
+    return EXIT_SUCCESS;
+    
+}

tests/wasix/udp-addr-reuse/run.sh

@@ -0,0 +1,3 @@
+$WASMER -q run main.wasm > output
+
+printf "0" | diff -u output - 1>/dev/null