Merge branch '16-update_neighbours' of https://gaufre.informatique.univ-paris-diderot.fr/perdriau/dazibao into 16-update_neighbours
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commit
00ed727da0
37
src/node.c
37
src/node.c
@ -90,10 +90,8 @@ int len_list(list *l) {
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neighbour_peer *get_random_neighbour() {
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neighbour_peer *get_random_neighbour() {
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printf(">> Getting random peer...\n");
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printf(">> Getting random peer...\n");
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// Get a random number
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// Get a random number
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time_t t;
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srand((unsigned) time(NULL));
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srand((unsigned) time(NULL));
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int n = (rand() % len_list(neighbour_list)) + 1;
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int n = (rand() % len_list(neighbour_list)) + 1;
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int l_l = len_list(neighbour_list);
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// Get nth neighbour
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// Get nth neighbour
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list *tmp = neighbour_list;
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list *tmp = neighbour_list;
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@ -125,13 +123,15 @@ neighbour_peer *get_neighbour(struct in6_addr *ip, int16_t port) {
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return NULL;
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return NULL;
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}
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}
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// Return -1 if the peer could not be added, 0 if it could or if it was already in the table
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// Return -1 if we have enough peers,
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// 1 if it was added
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// Return 0 if peer was updated as last_seen
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int add_n_update_neighbour(struct in6_addr *ip, int16_t port) {
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int add_n_update_neighbour(struct in6_addr *ip, int16_t port) {
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char * buff_str_ip[1024];
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char * buff_str_ip[1024];
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char * ip_str = inet_ntop(AF_INET6,ip, buff_str_ip, 1024);
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char * ip_str = (char * ) inet_ntop(AF_INET6,ip,(char * restrict) buff_str_ip, 1024);
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printf(">> Found peer %s:%i.\n", ip_str, ntohs(port));
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printf(">> Found peer %s @ %i.\n", ip_str, port);
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// We try to find a peer with this address and port.
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// We try to find a peer with this address and port.
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neighbour_peer *peer = get_neighbour(ip, port);
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neighbour_peer *peer = get_neighbour(ip, port);
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time_t curtime;
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time_t curtime;
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@ -158,15 +158,14 @@ int add_n_update_neighbour(struct in6_addr *ip, int16_t port) {
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node->data = (void*) peer;
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node->data = (void*) peer;
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node->next = neighbour_list;
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node->next = neighbour_list;
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neighbour_list = node;
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neighbour_list = node;
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return 0;
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return 1;
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}
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}
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} else {
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} else {
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printf(">> Found peer %s:%i, updating the last seen time...\n", (char *) ip, port);
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printf(">> Found peer %s @ %i, updating the last seen time...\n", ip_str, port);
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time_t curtime;
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time_t curtime;
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// if the peer was already in the list, update it
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// if the peer was already in the list, update it
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time(&curtime);
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time(&curtime);
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peer->last_seen = curtime;
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peer->last_seen = curtime;
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return 0;
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return 0;
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}
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}
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@ -610,16 +609,20 @@ int validate_tlv(char *data, int pos, int16_t packet_len){
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// Check that we can read a length
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// Check that we can read a length
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if(pos + 1 >= packet_len){
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if(pos + 1 >= packet_len){
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printf(">> Reading out of packet length. \n");
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return -1;
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return -1;
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}
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}
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unsigned char tlv_len = data[pos+1];
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unsigned char tlv_len = data[pos+1];
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// Check that the tlv does not exceed the packet length
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// Check that the tlv does not exceed the packet length
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if(pos + tlv_len >= packet_len){
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if(pos + tlv_len > packet_len){
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printf(">> The TLV Length exceed the packet length\n");
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return -1;
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return -1;
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}
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}
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printf(">> TLV has type %i\n", type );
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// Returns the type of the tlv or -1 if something went wrong
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// Returns the type of the tlv or -1 if something went wrong
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switch(type) {
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switch(type) {
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case 1:
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case 1:
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@ -902,15 +905,19 @@ int listen_for_packets(char * received_data_buffer, int received_data_len, struc
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// Neighbour check
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// Neighbour check
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struct in6_addr ip = sender->sin6_addr;
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struct in6_addr ip = sender->sin6_addr;
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int16_t port = sender->sin6_port;
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int16_t port = htons(sender->sin6_port);
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if(add_n_update_neighbour(&ip, port) == -1) {
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fprintf(stderr, ">> Maximum number of neighbour peers reached, aborting this packet.\n");
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int rc = add_n_update_neighbour(&ip, port);
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if( rc == -1) {
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printf(">> We have enough peers, we won't add him..\n");
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return -1;
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return -1;
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} else if (rc == 1){
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printf(">> Peer was added to the table.\n");
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} else {
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printf(">> Updated the time it was last seen.\n");
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}
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}
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// struct tlv_list received_tlvs;
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// if (validate_tlvs(formated_rec_datagram) < 0)
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int nbr_success_tlv = work_with_tlvs(received_data_buffer, received_data_len, sender, sock_fd);
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int nbr_success_tlv = work_with_tlvs(received_data_buffer, received_data_len, sender, sock_fd);
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if (nbr_success_tlv < 0){
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if (nbr_success_tlv < 0){
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perror(">> Error while treating the TLVs of the packet.");
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perror(">> Error while treating the TLVs of the packet.");
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@ -946,7 +953,7 @@ int run_node(int sock_fd){
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// Init the ~20s delay for node update.
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// Init the ~20s delay for node update.
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srand(time(NULL));
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srand(time(NULL));
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time_t delay = time(NULL) + 20;
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time_t delay = time(NULL) + 5;
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/* Descriptor zero is stdin */
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/* Descriptor zero is stdin */
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fds[0].fd = 0;
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fds[0].fd = 0;
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@ -63,7 +63,6 @@ typedef struct list {
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// The adress of the main peer
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// The adress of the main peer
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#define ROOT_PEER_ADDR "2001:660:3301:9200::51c2:1b9b"
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#define ROOT_PEER_ADDR "2001:660:3301:9200::51c2:1b9b"
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// TODO
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// fonctions signatures
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// fonctions signatures
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int listen_for_packets(char * received_data_buffer, int received_data_len, struct sockaddr_in6 * sender, int sock_fd);
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int listen_for_packets(char * received_data_buffer, int received_data_len, struct sockaddr_in6 * sender, int sock_fd);
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