kernel: rtl: Expose NIC properly through if_var.h

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 82 insertions, 0 deletions

diff --git a/sys/include/net/if_var.h b/sys/include/net/if_var.h
new file mode 100644
index 0000000..e032ff4
--- /dev/null
+++ b/sys/include/net/if_var.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _NET_IF_VAR_H_
+#define _NET_IF_VAR_H_
+
+#include <sys/queue.h>
+#include <sys/types.h>
+#include <net/if.h>
+#include <net/netbuf.h>
+
+#define NETIF_ADDR_LEN 32   /* In bytes */
+
+/* Return values for netif hooks */
+#define NETIF_ENQ_OK       0        /* Enqueued */
+#define NETIF_ENQ_FLUSHED  1        /* Internal queue flushed */
+
+/* Interface types */
+#define NETIF_TYPE_ANY  0   /* Any type */
+#define NETIF_TYPE_WIRE 1   /* Ethernet */
+
+/*
+ * Represents the address of a network
+ * interface.
+ *
+ * @data: Raw address bytes
+ */
+struct netif_addr {
+    uint8_t data[NETIF_ADDR_LEN];
+};
+
+/*
+ * Represents a network interface
+ *
+ * @name: Interface name
+ * @type: Interface type (see NETIF_TYPE*)
+ * @tx_enq: Enqueue a packet
+ * @tx_start: Start a packet
+ *
+ * XXX: tx_enq() returns 0 on success and 1 if a flush was needed
+ *      and the packets have been transmitted. Less than zero values
+ *      indicate failure.
+ */
+struct netif {
+    char name[IFNAMESIZ];
+    uint8_t type;
+    TAILQ_ENTRY(netif) link;
+    struct netif_addr addr;
+    int(*tx_enq)(struct netif *nifp, struct netbuf *nbp, void *data);
+    void(*tx_start)(struct netif *nifp);
+};
+
+void netif_add(struct netif *nifp);
+int netif_lookup(const char *name, uint8_t type, struct netif **res);
+
+#endif  /* !_NET_IF_VAR_H_ */