netops: abstract away socket closing

Winsock wants us to use closesocket() instead of close(), so introduce
the gitno_close function, which does the right thing.

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

src/netops.c

@@ -138,6 +138,18 @@ int gitno_send(GIT_SOCKET s, const char *msg, size_t len, int flags)
 	return off;
 }
 
+#ifdef GIT_WIN32
+int gitno_close(GIT_SOCKET s)
+{
+	return closesocket(s) == SOCKET_ERROR ? -1 : 0;
+}
+#else
+int gitno_close(GIT_SOCKET s)
+{
+	return close(s);
+}
+#endif
+
 int gitno_select_in(gitno_buffer *buf, long int sec, long int usec)
 {
 	fd_set fds;

src/netops.h

@@ -27,6 +27,7 @@ void gitno_consume_n(gitno_buffer *buf, size_t cons);
 
 int gitno_connect(const char *host, const char *port);
 int gitno_send(GIT_SOCKET s, const char *msg, size_t len, int flags);
+int gitno_close(GIT_SOCKET s);
 int gitno_select_in(gitno_buffer *buf, long int sec, long int usec);
 
 int gitno_extract_host_and_port(char **host, char **port, const char *url, const char *default_port);

src/transport-http.c

@@ -362,7 +362,7 @@ static int http_close(git_transport *transport)
 	transport_http *t = (transport_http *) transport;
 	int error;
 
-	error = close(t->socket);
+	error = gitno_close(t->socket);
 	if (error < 0)
 		return git__throw(GIT_EOSERR, "Failed to close the socket: %s", strerror(errno));
 

src/transport_git.c

@@ -505,15 +505,18 @@ static int git_download_pack(char **out, git_transport *transport, git_repositor
 static int git_close(git_transport *transport)
 {
 	transport_git *t = (transport_git*) transport;
-	int s = t->socket;
 	int error;
 
 	/* Can't do anything if there's an error, so don't bother checking */
-	git_pkt_send_flush(s);
-	error = close(s);
+	git_pkt_send_flush(t->socket);
+	error = gitno_close(t->socket);
 	if (error < 0)
 		error = git__throw(GIT_EOSERR, "Failed to close socket");
 
+#ifdef GIT_WIN32
+	WSACleanup();
+#endif
+
 	return error;
 }
 
@@ -528,10 +531,6 @@ static void git_free(git_transport *transport)
 		git_pkt_free(p);
 	}
 
-#ifdef GIT_WIN32
-	WSACleanup();
-#endif
-
 	git_vector_free(refs);
 	free(t->heads);
 	free(t->parent.url);