Add makefile and mkconfig.c

.clang-format

@@ -0,0 +1,3 @@
+BasedOnStyle: Google
+IndentWidth: 8
+UseTab: ForIndentation

.gitignore

@@ -52,3 +52,5 @@ Module.symvers
 Mkfile.old
 dkms.conf
 
+.ccls-cache/
+bin/

Makefile

@@ -0,0 +1,15 @@
+SOURCE_FILES = ./mkconfig.c
+OUTPUT=mkconfig
+
+build: $(SOURCE_FILES)
+	mkdir -p bin/ && \
+	gcc -Wall $(CFLAGS) $(LIBS) $(SOURCE_FILES) -o bin/$(OUTPUT)
+
+run:
+	bin/$(OUTPUT)
+
+compile_db: Makefile
+	bear -- make
+
+clean:
+	rm bin/$(OUTPUT)

mkconfig.c

@@ -0,0 +1,96 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+	if (argc < 6) {
+		fprintf(stderr,
+		        "Usage:\t   %s sourceip sourceport desinationip "
+		        "destinationport protocol [-o outputfile]\n",
+		        argv[0]);
+		fprintf(stderr,
+		        "\tor %s sourcepod sourceport desinationpod "
+		        "destinationport protocol [-o outputfile]\n",
+		        argv[0]);
+		fprintf(stderr,
+		        "\nExample:\t%s nginx 80 access 5978 TCP "
+		        "-o test.yaml\n",
+		        argv[0]);
+		fprintf(stderr, "\t\t%s nginx 80 access 5978 TCP\n", argv[0]);
+		return EX_USAGE;
+	}
+
+	int opt;
+	char output[200] = "";
+	while ((opt = getopt(argc, argv, "o:")) != -1) {
+		switch (opt) {
+			case 'o':
+				strcpy(output, optarg);
+				break;
+		}
+	}
+
+	if (strlen(output) == 0) {
+		strcpy(output, "ingress-egress-nginx.yaml");
+	}
+
+	char *sourceaddr = argv[optind];
+	int sourceport;
+	sscanf(argv[optind + 1], "%d", &sourceport);
+	char *destaddr = argv[optind + 2];
+	int destport;
+	sscanf(argv[optind + 3], "%d", &destport);
+	char *protocol = argv[optind + 4];
+
+	// printf(
+	//     "Source address: %s\nSource port: %d\nDestination address: "
+	//     "%s\nDestination port: %d\nProtocol: %s\nOutput: %s\n",
+	//     sourceaddr, sourceport, destaddr, destport, protocol, output);
+
+	const char *template =
+	    "apiVersion: networking.k8s.io/v1\n"
+	    "kind: NetworkPolicy\n"
+	    "metadata:\n"
+	    "  name: test-network-policy\n"
+	    "  namespace: policy-demo\n"
+	    "spec:\n"
+	    "  podSelector:\n"
+	    "    matchLabels:\n"
+	    "      run: %s\n"
+	    "  ingress:\n"
+	    "    - from:\n"
+	    "      - ipBlock:\n"
+	    "          cidr: 172.17.0.0/16\n"
+	    "      - podSelector:\n"
+	    "          matchLabels:\n"
+	    "            run: %s\n"
+	    "      ports:\n"
+	    "        - protocol: %s\n"
+	    "          port: %d\n"
+	    "  egress:\n"
+	    "    - to:\n"
+	    "        - ipBlock:\n"
+	    "            cidr: 10.0.0.0/24\n"
+	    "      ports:\n"
+	    "        - protocol: %s\n"
+	    "          port: %d\n";
+	// printf("----------TEMPLATE----------\n");
+	// printf(template, sourceaddr, destaddr, protocol, sourceport,
+	// protocol, destport); printf("\n----------------------------\n");
+
+	FILE *outputFile = fopen(output, "w");
+	fprintf(outputFile, template, sourceaddr, destaddr, protocol,
+	        sourceport, protocol, destport);
+
+	fclose(outputFile);
+
+	char cmd[100];
+	sprintf(cmd, "kubectl apply -f ./%s", output);
+
+	printf("%s\n", cmd);
+	system(cmd);
+
+	return 0;
+}