kernel: net: Add initial net_if headers

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

2 files changed, 109 insertions, 0 deletions

diff --git a/sys/include/net/if.h b/sys/include/net/if.h
new file mode 100644
index 0000000..bd57509
--- /dev/null
+++ b/sys/include/net/if.h
@@ -0,0 +1,35 @@
+/*
+ * 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_H_
+#define _NET_IF_H_
+
+#define IFNAMESIZ 16
+
+#endif  /* !_NET_IF_H_ */
diff --git a/sys/include/net/if_ether.h b/sys/include/net/if_ether.h
new file mode 100644
index 0000000..a8fcfa5
--- /dev/null
+++ b/sys/include/net/if_ether.h
@@ -0,0 +1,74 @@
+/*
+ * 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 _IF_ETHER_H_
+#define _IF_ETHER_H_
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <net/if.h>
+
+#define MACADDR_LEN 6
+
+struct __packed ether_frame {
+    uint8_t sync[7];        /* Preamble (sync stuff) */
+    uint8_t spd;            /* Start frame delimiter */
+    uint8_t macd[6];        /* MAC destination */
+    uint8_t macs[6];        /* MAC source */
+    uint16_t type;          /* Protocol type */
+    char payload[1];        /* sized @ 1+n */
+};
+
+/*
+ * Used by the driver to buffer packets.
+ */
+struct etherbuf {
+    struct ether_frame *frp;
+    off_t head;
+    off_t tail;
+    size_t cap;     /* In entries */
+};
+
+/*
+ * Ethernet device
+ *
+ * if_ether: E
+ * driver: D
+ *
+ * @if_name: Interface name.
+ * @tx: Transmit packets (D->E)
+ */
+struct etherdev {
+    char if_name[IFNAMESIZ];
+    struct etherbuf *buf;
+    ssize_t(*tx)(struct etherdev *ep, const void *buf, size_t len);
+    char mac_addr[MACADDR_LEN];
+};
+
+#endif  /* !_IF_ETHER_H_ */