110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
#include "dht.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <netdb.h>
|
|
#include <arpa/inet.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
// #define cpy(x, y, z) char *x_c = x; char *y_c = y; while(*y_c && z--) *x_c++ = *y_c++
|
|
|
|
int server_socket_udp;
|
|
|
|
void build_lookup_request(lookup_request* lr){
|
|
lr->hash_id = ntohs(lr->hash_id);
|
|
lr->node_id = ntohs(lr->node_id);
|
|
lr->node_ip.s_addr = ntohl(lr->node_ip.s_addr);
|
|
lr->node_port = ntohs(lr->node_port);
|
|
// snprintf(lr->node_request, HTTP_MAX_SIZE, "%d|%hd|%d|%u|%d\r\n\r\n", lr->message_type, ntohs(lr->hash_id), ntohs(lr->node_id), ntohl(ip.s_addr), ntohs(lr->node_port));
|
|
}
|
|
|
|
|
|
|
|
void lookup_request_init(lookup_request* lr, int message_type, int node_id, in_addr_t node_ip, int node_port, uint16_t hash_id)
|
|
{
|
|
lr->message_type = message_type;
|
|
lr->node_id = node_id;
|
|
lr->node_ip.s_addr = node_ip;
|
|
lr->node_port = node_port;
|
|
lr->hash_id = hash_id;
|
|
}
|
|
|
|
void extract_lookup_request(lookup_request* lr){
|
|
build_lookup_request(lr);
|
|
}
|
|
|
|
int call_network(lookup_request* lr, in_addr_t ip, int port){
|
|
// int succ_sock;
|
|
struct addrinfo hints, *servinfo; // *p;
|
|
int rv;
|
|
|
|
struct sockaddr_in addr;
|
|
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(port);
|
|
addr.sin_addr.s_addr = htonl(ip);
|
|
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_family = AF_INET;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
|
|
char port_str[6];
|
|
snprintf(port_str, sizeof port_str, "%d", port);
|
|
|
|
char ip_str[INET_ADDRSTRLEN];
|
|
|
|
inet_ntop(AF_INET, &ip, ip_str, INET_ADDRSTRLEN);
|
|
|
|
if ((rv = getaddrinfo(ip_str, port_str, &hints, &servinfo)) != 0) {
|
|
fprintf(stderr, "Func: call_network - getaddrinfo: %s\n", gai_strerror(rv));
|
|
return 1;
|
|
}
|
|
|
|
addr = *((struct sockaddr_in*) servinfo->ai_addr);
|
|
freeaddrinfo(servinfo);
|
|
|
|
lr->node_ip.s_addr = ntohl(addr.sin_addr.s_addr);
|
|
lr->node_port = ntohs(addr.sin_port);
|
|
|
|
/*
|
|
for(p = servinfo; p != NULL; p = p->ai_next) {
|
|
if ((succ_sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
|
|
perror("Func: call_network - socket");
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (p == NULL) {
|
|
fprintf(stderr, "Func: call_network - failed to create socket\n");
|
|
return 2;
|
|
}
|
|
*/
|
|
|
|
build_lookup_request(lr);
|
|
|
|
if (sendto(server_socket_udp, lr, sizeof(lookup_request), 0, (struct sockaddr*) &addr, sizeof(struct sockaddr_in)) == -1) {
|
|
perror("Func: call_network - sendto");
|
|
exit(1);
|
|
}
|
|
/*
|
|
size_t addrlen = sizeof(addr);
|
|
if (sendto(server_socket_udp, lr, sizeof(lr), 0, (struct sockaddr*)&addr, addrlen) == -1)
|
|
{
|
|
perror("Func: call_network - sendto");
|
|
exit(1);
|
|
}
|
|
*/
|
|
|
|
// freeaddrinfo(servinfo);
|
|
// close(succ_sock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void clone_lookup_request(lookup_request* dest, lookup_request* source){
|
|
memcpy(dest, source, sizeof(lookup_request));
|
|
}
|