net: implement netdev flags

kernel-src/include/kernel/net.h

@@ -19,16 +19,28 @@ typedef struct {
 	size_t size;
 } netdesc_t;
 
+typedef struct {
+	uint16_t port;
+	uint32_t addr;
+} ipv4addr_t;
+
 typedef struct {
 	uint8_t address[6];
 } __attribute__((packed)) mac_t;
 
+#define NETDEV_FLAGS_UP 0x1
+#define NETDEV_FLAGS_BROADCAST 0x2
+#define NETDEV_FLAGS_DEBUG 0x4
+#define NETDEV_FLAGS_LOOPBACK 0x8
+#define NETDEV_FLAGS_RUNNING 0x40
+
 typedef struct netdev_t {
 	mac_t mac;
 	size_t mtu;
 	uint32_t ip;
 	int ipcurrid; // XXX This is defined as something per peer. However, having only one of these *should* work for most cases
 	hashtable_t arpcache;
+	short flags;
 	int (*allocdesc)(struct netdev_t *netdev, size_t requestedsize, netdesc_t *desc);
 	int (*freedesc)(struct netdev_t *netdev, netdesc_t *desc);
 	int (*sendpacket)(struct netdev_t *_internal, netdesc_t desc, mac_t targetmac, int proto);
@@ -54,11 +66,6 @@ typedef struct {
 	uint16_t checksum;
 } __attribute__((packed)) udpframe_t;
 
-typedef struct {
-	uint16_t port;
-	uint32_t addr;
-} ipv4addr_t;
-
 #define NET_BROADCAST_MAC (mac_t){.address = {0xff,0xff,0xff,0xff,0xff,0xff}}
 
 #define MAC_EQUAL(m1,m2) (memcmp(m1, m2, sizeof(mac_t)) == 0)

kernel-src/include/kernel/sock.h

@@ -26,6 +26,7 @@ typedef struct {
 	pollheader_t pollheader;
 	int type;
 	int shutdown;
+	int error;
 } socket_t;
 
 typedef struct {

kernel-src/io/net/loopback.c

@@ -59,6 +59,7 @@ void loopback_init() {
 	loopbacknetdev.allocdesc = loopback_allocdesc;
 	loopbacknetdev.freedesc = loopback_freedesc;
 	loopbacknetdev.ip = 0x7f000001;
+	loopbacknetdev.flags = NETDEV_FLAGS_UP | NETDEV_FLAGS_LOOPBACK | NETDEV_FLAGS_RUNNING;
 	__assert(hashtable_init(&loopbacknetdev.arpcache, 30) == 0);
 
 	for (int i = 0; i < 6; ++i)

kernel-src/io/net/rtl8169.c

@@ -404,6 +404,8 @@ static void init_controller(pcienum_t *pci_enum) {
 		return;
 	}
 
+	netdev->netdev.flags = NETDEV_FLAGS_UP | NETDEV_FLAGS_BROADCAST | NETDEV_FLAGS_RUNNING;
+
 	// enable rx/tx
 	outb(pci_bar.address + REGISTER_COMMAND, REGISTER_COMMAND_TX_ENABLE | REGISTER_COMMAND_RX_ENABLE);
 }