add some notes and basic code

src/server.c

@@ -1,5 +1,34 @@
 #include "server.h"
+#include "colors.h"
 
 int start_server(void) {
+	char ipv4[INET_ADDRSTRLEN];
+	struct sockaddr_in sa;
+
+	inet_pton(AF_INET, "192.168.0.1", &(sa.sin_addr));
+	inet_ntop(AF_INET, &(sa.sin_addr), ipv4, INET_ADDRSTRLEN);
+
+	fprintf(stdout, BLUE "IPv4: %s\n" RESET, ipv4);
+
 	return 0;
 }
+
+void get_local_ip(void) {
+	char service[] = "3030";
+	struct addrinfo hints;
+	struct addrinfo *res;
+
+	memset(&hints, 0, sizeof hints);
+	hints.ai_family = AF_UNSPEC;	 // IPv4 or IPv6
+	hints.ai_socktype = SOCK_STREAM; // TCP
+	hints.ai_flags = AI_PASSIVE;	 // fill in IP for me
+
+	int status = getaddrinfo(NULL, service, &hints, &res);
+	if (status != 0) {
+		fprintf(stderr, RED "getaddrinfo() error: %s\n" RESET,
+			gai_strerror(status));
+		exit(1);
+	}
+
+	freeaddrinfo(res);
+}