Implémentation de poll() terminé, ajouter les nouvelles fonctions et
leurs signtaure à faire
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n07070
parent
eefea551f7
commit
db3875205e
203
src/node.c
203
src/node.c
@ -7,6 +7,11 @@
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#include <netinet/in.h>
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#include <string.h>
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#include <time.h>
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#include <errno.h>
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#include <arpa/inet.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <unistd.h>
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#include "node.h"
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#include "tlv.h"
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@ -551,35 +556,191 @@ void listen_for_packets(){
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}
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}
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int run_node(int sock_fd, struct sockaddr_in6 * peer){
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printf(">> Boostrapping node...\n");
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int ret;
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ssize_t bytes;
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char input_buffer[1024];
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char output_buffer[1024];
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struct pollfd fds[2];
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/* Descriptor zero is stdin */
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fds[0].fd = 0;
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fds[1].fd = sock_fd;
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fds[0].events = POLLIN | POLLPRI;
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fds[1].events = POLLIN | POLLPRI;
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/* Normally we'd check an exit condition, but for this example
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* we loop endlessly.
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*/
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while (1) {
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/* Call poll() */
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ret = poll(fds, 2, -1);
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if (ret < 0) {
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printf("Error - poll returned error: %s\n", strerror(errno));
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break;
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}
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if (ret > 0) {
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/* Regardless of requested events, poll() can always return these */
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if (fds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
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printf("Error - poll indicated stdin error\n");
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break;
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}
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if (fds[1].revents & (POLLERR | POLLHUP | POLLNVAL)) {
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printf("Error - poll indicated socket error\n");
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break;
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}
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/* Check if data to read from stdin */
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printf(">> ");
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if (fds[0].revents & (POLLIN | POLLPRI)) {
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bytes = read(0, output_buffer, sizeof(output_buffer));
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if (bytes < 0) {
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printf("Error - stdin error: %s\n", strerror(errno));
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break;
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}
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// // Reset buffer
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// // memset(&output_buffer, '\0', 1024);
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//
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// // Build packet
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// struct packet message;
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// message.magic = 95;
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// message.version = 1;
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// message.body = malloc(20);
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//
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// // Build TLV
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// struct neighbour_req *neigh_req = (neighbour_req*) malloc(sizeof(neighbour_req));
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//
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// neigh_req->type = 2;
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// neigh_req->length = 0;
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//
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// message.length = 2 * sizeof(unsigned char);
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// printf("(%i)\n", message.length );
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// // message.body = (char *) neigh_req;
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//
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// memcpy(message.body, &neigh_req, sizeof(struct neighbour_req));
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// memcpy(&output_buffer, &message, sizeof(struct packet));
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struct iovec vec_buff_reply = {.iov_len = sizeof(output_buffer), .iov_base = output_buffer};
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struct sockaddr_in6 ntp_server_adress;
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memset(&ntp_server_adress, 0, sizeof(ntp_server_adress));
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int inet_p = inet_pton(AF_INET6, "2a00:1080:800::6:1", &ntp_server_adress.sin6_addr);
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if(inet_p < 1){
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perror(">> Failed inet_pton.");
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exit(1);
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}
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ntp_server_adress.sin6_family = AF_INET6;
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ntp_server_adress.sin6_port = htons(1212); // NTP port number.
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const struct msghdr reply = {
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.msg_name = &ntp_server_adress,
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.msg_namelen = sizeof(ntp_server_adress),
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.msg_iov = &vec_buff_reply,
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.msg_iovlen = 1
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};
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printf("Sending: %li bytes as : %s\n", sizeof(output_buffer), output_buffer);
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// bytes = sendto(sock_fd, output_buffer, sizeof(output_buffer), 0, (struct sockaddr *)peer, sizeof(struct sockaddr_in));
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bytes = sendmsg((int) sock_fd, &reply, 0);
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if (bytes < 0) {
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perror("deded");
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printf("Error - sendto error: %s\n", strerror(errno));
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break;
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}
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}
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/* Check if data to read from socket */
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if (fds[1].revents & (POLLIN | POLLPRI)) {
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bytes = recvfrom(sock_fd, input_buffer, sizeof(input_buffer),
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0, NULL, NULL);
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if (bytes < 0) {
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printf("Error - recvfrom error: %s\n", strerror(errno));
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break;
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}
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if (bytes > 0) {
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printf("Received: %.*s\r", (int)bytes, input_buffer);
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}
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}
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}
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}
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return 0;
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}
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int main(int argc, const char *argv[]) {
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printf(">> Starting node\n");
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int cont = 1;
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while(cont){
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unsigned long local_port = 1212;
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unsigned long remote_port = 1212;
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// We create the neighbourhood table
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// neighbour_peer neighbour_list[NEIGHBOUR_MAX];
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// We create the message table
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int sock_fd;
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// We create our own message.
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struct sockaddr_in6 server_addr;
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struct sockaddr_in6 peer_addr;
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// Listen for incoming packets
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listen_for_packets();
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memset(&peer_addr, 0, sizeof(peer_addr));
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// This is in it's own fork.
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time_t delay = time(NULL) + 20;
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while(! (delay < time(NULL))) {
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// Theses functions are there for general book-keeping,and run in there own
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// thread, being run every 20 seconds.
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// Every 20 sec, if we have less than 5 neighbours, we ask for more peers
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// by sending out a TLV neighbour Request at a random peer.
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t_ask_for_more_peers();
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// Every 20 sec, we also check for a peer that didn't emit a new message for
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// the past 70 sec, if he's temporary, we delete him from the neighbourhood.
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t_update_neighbours();
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// We send out a TLV Network hash to get an ideal of the network state.
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t_get_network_state();
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}
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peer_addr.sin6_family = AF_INET6;
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peer_addr.sin6_port = htons(remote_port);
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if (inet_pton(AF_INET6, "2001:660:3301:9200::51c2:1b9b", &peer_addr.sin6_addr) < 0) {
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printf("Error - invalid remote address '%s'\n", "2001:660:3301:9200::51c2:1b9b");
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return 1;
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}
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/* Create UDP socket */
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sock_fd = socket(AF_INET6, SOCK_DGRAM, 0);
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if (sock_fd < 0) {
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printf("Error - failed to open socket: %s\n", strerror(errno));
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return 1;
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}
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/* Bind socket */
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memset(&server_addr, 0, sizeof(server_addr));
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server_addr.sin6_family = AF_INET6;
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// server_addr.sin6_addr.in6_addr = htonl(INADDR_ANY);
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server_addr.sin6_port = htons(local_port);
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if (bind(sock_fd, (struct sockaddr *)(&server_addr), sizeof(server_addr)) < 0) {
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printf("Error - failed to bind socket: %s\n", strerror(errno));
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return 1;
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}
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run_node(sock_fd, &peer_addr);
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close(sock_fd);
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//
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// while(cont){
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//
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// // We create the neighbourhood table
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// // neighbour_peer neighbour_list[NEIGHBOUR_MAX];
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// // We create the message table
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//
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// // We create our own message.
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//
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// // Listen for incoming packets
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// // listen_for_packets();
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// //
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// // // This is in it's own fork.
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// // time_t delay = time(NULL) + 20;
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// // while(! (delay < time(NULL))) {
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// // // Theses functions are there for general book-keeping,and run in there own
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// // // thread, being run every 20 seconds.
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// // // Every 20 sec, if we have less than 5 neighbours, we ask for more peers
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// // // by sending out a TLV neighbour Request at a random peer.
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// // t_ask_for_more_peers();
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// // // Every 20 sec, we also check for a peer that didn't emit a new message for
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// // // the past 70 sec, if he's temporary, we delete him from the neighbourhood.
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// // t_update_neighbours();
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// // // We send out a TLV Network hash to get an ideal of the network state.
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// // t_get_network_state();
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// }
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// }
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return 0;
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}
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