1 files changed, 52 insertions, 0 deletions
diff --git a/Semestr 4/sieci/pracownia2/franciszek_malinka/utils.h b/Semestr 4/sieci/pracownia2/franciszek_malinka/utils.h
new file mode 100644
index 0000000..edf90d0
--- /dev/null
+++ b/Semestr 4/sieci/pracownia2/franciszek_malinka/utils.h
@@ -0,0 +1,52 @@
+#ifndef UTILS_H
+#define UTILS_H
+#define UTILS_H
+
+#include "config.h"
+#include <stdint.h>
+#include <time.h>
+#include <poll.h>
+#include "network_addr.h"
+#include "dist_vector.h"
+
+#define NS_TO_MS(X) ((long)(X) / (long)1000000)
+#define S_TO_MS(X) ((long)(X) * (long)1000)
+
+/* Returns a UDP socket. */
+int get_socket();
+
+/* Binds socket to given port and set the broadcast permission. */
+void bind_to_port(int sockfd, uint16_t port);
+
+/* Computes the time elapsed between start and finish in miliseconds. */
+long get_time_interval(struct timespec start, struct timespec finish);
+
+/* Polls given socket with given timeout and changes the timeout accordingly. */
+int poll_socket_modify_timeout(int sockfd, int *timeout);
+
+/* For debug purposes only. Recieves and prints UDP message. */
+void recv_and_print(int sockfd, int networks_number, struct network_addr *networks);
+
+/* Sends message in buffer of length buffer_len to addr through given socket. 
+ * IT DOES NOT TERMINATE THE PROGRAM IF SENDTO RETURNS ANY ERRORS! 
+ * One must handle the errors on their own. 
+ */  
+size_t send_message(int sockfd, char *buffer, int buffer_len, struct in_addr addr);
+
+/* Receive message and write it to buffer. */
+size_t recv_message(int sockfd, char *buffer, struct sockaddr_in *sender);
+
+/* Parse datagram into a vector item. */
+struct vector_item parse_message(char *buffer, struct sockaddr_in *sender);
+
+/* Listnes for routers for timeout ms. */
+void listen_for_routers(int sockfd, int timeout, int networks_number, struct network_addr *networks, uint16_t *dists, list_t *dv);
+
+/* Propagates dv to all connected networks. */
+void propagate_distance_vector(int sockfd, int networks_number, struct network_addr *networks, uint16_t *dists, list_t *dv);
+
+/* Checks if given address is in network range. */
+bool is_from_network(struct in_addr ip_addr, struct network_addr network);
+ 
+
+#endif
+\ No newline at end of file