3 files changed, 34 insertions, 0 deletions
diff --git a/libhw_generic/CMakeLists.txt b/libhw_generic/CMakeLists.txt
index 9c88937..0356770 100644
--- a/libhw_generic/CMakeLists.txt
+++ b/libhw_generic/CMakeLists.txt
@@ -12,4 +12,5 @@ target_link_libraries(libhw_generic INTERFACE
 
 target_sources(libhw_generic INTERFACE
 	alarmclock.c
+	net.c
 )
diff --git a/libhw_generic/include/libhw/generic/net.h b/libhw_generic/include/libhw/generic/net.h
index a016d51..0f9872e 100644
--- a/libhw_generic/include/libhw/generic/net.h
+++ b/libhw_generic/include/libhw/generic/net.h
@@ -23,6 +23,8 @@
 #define NET_ECLOSED             6
 #define NET_EMSGSIZE            7
 
+const char *net_strerror(int net_errno);
+
 /* Address types **************************************************************/
 
 struct net_ip4_addr {
diff --git a/libhw_generic/net.c b/libhw_generic/net.c
new file mode 100644
index 0000000..e2785ae
--- /dev/null
+++ b/libhw_generic/net.c
@@ -0,0 +1,31 @@
+/* libhw_generic/net.c - Device-independent <libhw/generic/net.h> utilities
+ *
+ * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+#include <libmisc/assert.h>
+
+#include <libhw/generic/net.h>
+
+#define NET_EOTHER              1
+#define NET_EARP_TIMEOUT        2
+#define NET_EACK_TIMEOUT        3
+#define NET_ERECV_TIMEOUT       4
+#define NET_ETHREAD             5
+#define NET_ECLOSED             6
+#define NET_EMSGSIZE            7
+
+const char *net_strerror(int net_errno) {
+	switch (net_errno) {
+	case NET_EOTHER: return "unknown error";
+	case NET_EARP_TIMEOUT: return "ARP timeout";
+	case NET_EACK_TIMEOUT: return "TCP ACK timeout";
+	case NET_ERECV_TIMEOUT: return "receive timeout";
+	case NET_ETHREAD: return "thread error";
+	case NET_ECLOSED: return "already closed";
+	case NET_EMSGSIZE: return "message too long";
+	default:
+		assert_notreached("invalid net_errno");
+	}
+}