socket_util: added socket_bind_listen()

Moved code from listen_add_address() (listen.c) to socket_util.c.

src/listen.c

@@ -18,6 +18,7 @@
  */
 
 #include "listen.h"
+#include "socket_util.h"
 #include "client.h"
 #include "conf.h"
 #include "utils.h"
@@ -45,8 +46,6 @@
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "listen"
 
-#define ALLOW_REUSE	1
-
 #define DEFAULT_PORT	6600
 
 struct listen_socket {
@@ -73,49 +72,13 @@ static bool
 listen_add_address(int pf, const struct sockaddr *addrp, socklen_t addrlen,
 		   GError **error)
 {
-	int fd, ret;
+	int fd;
-	const int reuse = ALLOW_REUSE;
-#ifdef HAVE_STRUCT_UCRED
-	int passcred = 1;
-#endif
 	struct listen_socket *ls;
 	GIOChannel *channel;
 
-	fd = socket(pf, SOCK_STREAM, 0);
+	fd = socket_bind_listen(pf, SOCK_STREAM, 0, addrp, addrlen, 5, error);
-	if (fd < 0) {
+	if (fd < 0)
-		g_set_error(error, listen_quark(), errno,
-			    "Failed to create socket: %s", strerror(errno));
 		return false;
-	}
-
-	ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
-			 &reuse, sizeof(reuse));
-	if (ret < 0) {
-		g_set_error(error, listen_quark(), errno,
-			    "setsockopt() failed: %s", strerror(errno));
-		close(fd);
-		return false;
-	}
-
-	ret = bind(fd, addrp, addrlen);
-	if (ret < 0) {
-		g_set_error(error, listen_quark(), errno,
-			    "%s", strerror(errno));
-		close(fd);
-		return false;
-	}
-
-	ret = listen(fd, 5);
-	if (ret < 0) {
-		g_set_error(error, listen_quark(), errno,
-			    "listen() failed: %s", strerror(errno));
-		close(fd);
-		return false;
-	}
-
-#ifdef HAVE_STRUCT_UCRED
-	setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
-#endif
 
 	ls = g_new(struct listen_socket, 1);
 	ls->fd = fd;

src/socket_util.c

@@ -20,17 +20,27 @@
 #include "socket_util.h"
 #include "config.h"
 
+#include <errno.h>
+#include <unistd.h>
+
 #ifndef G_OS_WIN32
 #include <sys/socket.h>
 #include <netdb.h>
 #else /* G_OS_WIN32 */
 #include <ws2tcpip.h>
+#include <winsock.h>
 #endif /* G_OS_WIN32 */
 
 #ifdef HAVE_IPV6
 #include <string.h>
 #endif
 
+static GQuark
+listen_quark(void)
+{
+	return g_quark_from_static_string("listen");
+}
+
 char *
 sockaddr_to_string(const struct sockaddr *sa, size_t length, GError **error)
 {
@@ -79,3 +89,54 @@ sockaddr_to_string(const struct sockaddr *sa, size_t length, GError **error)
 
 	return g_strconcat(host, ":", serv, NULL);
 }
+
+int
+socket_bind_listen(int domain, int type, int protocol,
+		   const struct sockaddr *address, size_t address_length,
+		   int backlog,
+		   GError **error)
+{
+	int fd, ret;
+	const int reuse = 1;
+#ifdef HAVE_STRUCT_UCRED
+	int passcred = 1;
+#endif
+
+	fd = socket(domain, type, protocol);
+	if (fd < 0) {
+		g_set_error(error, listen_quark(), errno,
+			    "Failed to create socket: %s", g_strerror(errno));
+		return -1;
+	}
+
+	ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
+			 &reuse, sizeof(reuse));
+	if (ret < 0) {
+		g_set_error(error, listen_quark(), errno,
+			    "setsockopt() failed: %s", g_strerror(errno));
+		close(fd);
+		return -1;
+	}
+
+	ret = bind(fd, address, address_length);
+	if (ret < 0) {
+		g_set_error(error, listen_quark(), errno,
+			    "%s", strerror(errno));
+		close(fd);
+		return -1;
+	}
+
+	ret = listen(fd, backlog);
+	if (ret < 0) {
+		g_set_error(error, listen_quark(), errno,
+			    "listen() failed: %s", g_strerror(errno));
+		close(fd);
+		return -1;
+	}
+
+#ifdef HAVE_STRUCT_UCRED
+	setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
+#endif
+
+	return fd;
+}

src/socket_util.h

@@ -43,4 +43,24 @@ struct sockaddr;
 char *
 sockaddr_to_string(const struct sockaddr *sa, size_t length, GError **error);
 
+/**
+ * Creates a socket listening on the specified address.  This is a
+ * shortcut for socket(), bind() and listen().
+ *
+ * @param domain the socket domain, e.g. PF_INET6
+ * @param type the socket type, e.g. SOCK_STREAM
+ * @param protocol the protocol, usually 0 to let the kernel choose
+ * @param address the address to listen on
+ * @param address_length the size of #address
+ * @param backlog the backlog parameter for the listen() system call
+ * @param error location to store the error occuring, or NULL to
+ * ignore errors
+ * @return the socket file descriptor or -1 on error
+ */
+int
+socket_bind_listen(int domain, int type, int protocol,
+		   const struct sockaddr *address, size_t address_length,
+		   int backlog,
+		   GError **error);
+
 #endif