Add license

LICENSE.md

@@ -0,0 +1,9 @@
+Copyright 2025 Interzero Product Cycle GmbH
+
+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 the copyright holder 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 HOLDER 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.

README.md

@@ -43,3 +43,5 @@ If you bridge both sides to a real NIC and you have DHCP servers on both network
   - `nc localhost 10000 < fifo1 > fifo2`
 - Start an instance of EtherCat with the other ends of the FIFOs on both hosts
   - `./ethercat tapN < fifo2 > fifo1`
+
+~Copyright 2025 Interzero Product Cycle GmbH, see LICENSE.md~

build-static.sh

@@ -1,4 +1,11 @@
 #!/usr/bin/env bash
+
+# Copyright 2025 Interzero Product Cycle GmbH
+#
+# This program is free software under the terms of the BSD-3-Clause license.
+# A copy of this license should have been provided with the code.
+# If not, see https://opensource.org/license/BSD-3-Clause or https://spdx.org/licenses/BSD-3-Clause.html
+
 set -v
 rm ethercat-static
 gcc -Wall -Wextra -fPIE -pie -static -static-libgcc ethercat.c -o ethercat-static

build.sh

@@ -1,4 +1,11 @@
 #!/usr/bin/env bash
+
+# Copyright 2025 Interzero Product Cycle GmbH
+#
+# This program is free software under the terms of the BSD-3-Clause license.
+# A copy of this license should have been provided with the code.
+# If not, see https://opensource.org/license/BSD-3-Clause or https://spdx.org/licenses/BSD-3-Clause.html
+
 set -v
 rm ethercat
 gcc -Wall -Wextra ethercat.c -o ethercat

ethercat.c

@@ -1,3 +1,11 @@
+/*
+  Copyright 2025 Interzero Product Cycle GmbH
+
+  This program is free software under the terms of the BSD-3-Clause license.
+  A copy of this license should have been provided with the code.
+  If not, see https://opensource.org/license/BSD-3-Clause or https://spdx.org/licenses/BSD-3-Clause.html
+*/
+
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/if.h>