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This commit is contained in:
gonzalef 2020-04-16 15:27:32 +02:00
parent cdef7ee0ac
commit 50bb64059b
5 changed files with 34 additions and 42 deletions
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1
src/hash.h
View File

@ -2,6 +2,7 @@
#define HASH_H
#include <openssl/sha.h>
#include <stdint.h>
#include "tlv.h"
#include "parser.h"

25
src/node.c
View File

@ -1,18 +1,11 @@
// This is the main file of the Dazibao project. It represents the node, and
// handles all of the main logic, including the network connexions.
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <time.h>
#include "node.h"
#include "tlv.h"
#include "hash.h"
#include "parser.h"
// Static variables
static list *data_list;
static list *neighbour_list;
/* ---- Fonctions utilitaires ---- */
@ -47,7 +40,7 @@ neighbour_peer *get_random_neighbour() {
}
// get data associated with id, if it doesn't exist return NULL
pub_data *get_data(long id) {
pub_data *get_data(int64_t id) {
list *tmp = data_list;
pub_data *data;
@ -62,7 +55,7 @@ pub_data *get_data(long id) {
}
// Take data as args and create a pub_data structure in the heap
pub_data *copy_data(unsigned char len, long id, short seqno, char *data) {
pub_data *copy_data(unsigned char len, int64_t id, int16_t seqno, char *data) {
pub_data *new_data = (pub_data*) malloc(sizeof(pub_data));
char *_data = (char*) malloc(len);
new_data->length = len;
@ -75,7 +68,7 @@ pub_data *copy_data(unsigned char len, long id, short seqno, char *data) {
}
// Add new data to data list
void add_data(unsigned char len, long id, short seqno, char *data) {
void add_data(unsigned char len, int64_t id, int16_t seqno, char *data) {
// If id is the same as this node's id then we only update seqno
if(id == NODE_ID) {
pub_data *node_data = get_data(NODE_ID);
@ -103,7 +96,7 @@ void add_data(unsigned char len, long id, short seqno, char *data) {
list *tmp = data_list;
list *last = NULL;
list *new_node;
long cur_id;
int64_t cur_id;
while(tmp != NULL) {
cur_id = ((pub_data*) tmp->data)->id;
@ -224,7 +217,7 @@ int send_tlv(union tlv * tlv_to_send, int tlv_size, struct sockaddr_in6 * dest_l
// We need to make sure the TLV announces a length that will no go onto
// another tlv, as we might end up reading bullshit.
int validate_tlv(char *data, int pos, short packet_len){
int validate_tlv(char *data, int pos, int16_t packet_len){
char type = data[pos];
// Nothing to do in this case
@ -309,7 +302,7 @@ int update_neighbours(){
};
// We then look at the differents TLVs in the packet.
int work_with_tlvs(char * data, short packet_len, struct sockaddr_in6 sender){
int work_with_tlvs(char * data, int16_t packet_len, struct sockaddr_in6 sender){
int pos = 0;
unsigned char tlv_len, hash[16];
char warn[32];

23
src/node.h
View File

@ -4,12 +4,13 @@
#define NODE_H
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <time.h>
#include <stdint.h>
/* la table de voisins, qui est indexée par adresses de socket (des paires (IP, Port)),
* et dont chaque entrée contient un booléen indiquant si le pair est permanent
@ -18,7 +19,7 @@
*/
typedef struct neighbour_peer {
struct in6_addr ip;
short port;
int16_t port;
char is_temporary;
struct timeval last_seen;
} neighbour_peer;
@ -32,8 +33,8 @@ typedef struct neighbour_peer {
typedef struct pub_data {
unsigned char length;
long id;
short seqno;
int64_t id;
int16_t seqno;
char *data;
} pub_data;
@ -57,10 +58,6 @@ typedef struct list {
// The neighbour table has 15 entries
#define NEIGHBOUR_MAX 15
// Static variables
static list *data_list;
static list *neighbour_list;
// TODO
// fonctions signatures
@ -68,11 +65,11 @@ void listen_for_packets();
int check_header(char * received_datagram, int buffer_len, packet * packet_to_return);
int validate_tlv(char *data, int pos, short packet_len);
int validate_tlv(char *data, int pos, int16_t packet_len);
int update_neighbours();
int work_with_tlvs(char * data, short packet_len, struct sockaddr_in6 sender);
int work_with_tlvs(char * data, int16_t packet_len, struct sockaddr_in6 sender);
void add_tlv(struct packet *packet, union tlv *tlv, char type);
@ -101,12 +98,12 @@ int len_list(list *l);
neighbour_peer *get_random_neighbour();
// get data associated with id, if it doesn't exist return NULL
pub_data *get_data(long id);
pub_data *get_data(int64_t id);
// Take data as args and create a pub_data structure in the heap
pub_data *copy_data(unsigned char len, long id, short seqno, char *data);
pub_data *copy_data(unsigned char len, int64_t id, int16_t seqno, char *data);
// add new data to data list
void add_data(unsigned char len, long id, short seqno, char *data);
void add_data(unsigned char len, int64_t id, int16_t seqno, char *data);
#endif

14
src/tlv.c
View File

@ -68,7 +68,7 @@ int build_neighbour_req(tlv *tlv) {
return 0;
}
int build_neighbour(tlv *tlv, struct in6_addr ip, short port) {
int build_neighbour(tlv *tlv, struct in6_addr ip, int16_t port) {
neighbour *new = (neighbour*) malloc(sizeof(neighbour));
if(new == NULL)
@ -92,7 +92,7 @@ int build_network_hash(tlv *tlv, list *data_list) {
new->type = 4;
new->length = 16;
hash_network(data_list, new->network_hash);
hash_network(data_list, (unsigned char*) new->network_hash);
tlv->network_hash = new;
@ -113,7 +113,7 @@ int build_network_state_req(tlv *tlv) {
return 0;
}
int build_node_hash(tlv *tlv, long node_id, short seqno, char *data) {
int build_node_hash(tlv *tlv, int64_t node_id, int16_t seqno, char *data) {
node_hash *new = (node_hash*) malloc(sizeof(node_hash));
if(new == NULL)
@ -125,14 +125,14 @@ int build_node_hash(tlv *tlv, long node_id, short seqno, char *data) {
new->seqno = seqno;
pub_data pdata = (pub_data) {.id = node_id, .seqno = seqno, .data = data};
hash_data(&pdata, new->node_hash);
hash_data(&pdata, (unsigned char*) new->node_hash);
tlv->node_hash = new;
return 0;
}
int build_node_state_req(tlv *tlv, long node_id) {
int build_node_state_req(tlv *tlv, int64_t node_id) {
node_state_req *new = (node_state_req*) malloc(sizeof(node_state_req));
if(new == NULL)
@ -147,7 +147,7 @@ int build_node_state_req(tlv *tlv, long node_id) {
return 0;
}
int build_node_state(tlv *tlv, long node_id, short seqno, char *data, size_t data_len) {
int build_node_state(tlv *tlv, int64_t node_id, int16_t seqno, char *data, size_t data_len) {
node_state *new = (node_state*) malloc(sizeof(node_state));
int len = data_len + 26;
@ -167,7 +167,7 @@ int build_node_state(tlv *tlv, long node_id, short seqno, char *data, size_t dat
memcpy(new->data, data, len);
pub_data pdata = (pub_data) {.id = node_id, .seqno = seqno, .data = data};
hash_data(&pdata, new->node_hash);
hash_data(&pdata, (unsigned char*) new->node_hash);
tlv->node_state = new;

13
src/tlv.h
View File

@ -4,6 +4,7 @@
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <stdint.h>
#define LEN_NEIGHBOUR_REQ 0
#define LEN_NEIGHBOUR 18
@ -65,7 +66,7 @@ typedef struct network_state_req {
typedef struct node_hash {
unsigned char type;
unsigned char length;
long node_id;
int64_t node_id;
short seqno;
char node_hash[16];
} node_hash;
@ -74,14 +75,14 @@ typedef struct node_hash {
typedef struct node_state_req {
unsigned char type;
unsigned char length;
long node_id;
int64_t node_id;
} node_state_req;
// 28 octets min, 220 octets max (data 0 -> 192)
typedef struct node_state {
unsigned char type;
unsigned char length;
long node_id;
int64_t node_id;
short seqno;
char node_hash[16];
char data[192];
@ -121,9 +122,9 @@ int build_neighbour_req(union tlv *tlv);
int build_neighbour(tlv *tlv, struct in6_addr ip, short port);
int build_network_hash(tlv *tlv, list *data_list);
int build_network_state_req(tlv *tlv);
int build_node_hash(tlv *tlv, long node_id, short seqno, char *data);
int build_node_state_req(tlv *tlv, long node_id);
int build_node_state(tlv *tlv, long node_id, short seqno, char *data, size_t data_len);
int build_node_hash(tlv *tlv, int64_t node_id, short seqno, char *data);
int build_node_state_req(tlv *tlv, int64_t node_id);
int build_node_state(tlv *tlv, int64_t node_id, short seqno, char *data, size_t data_len);
int build_warning(tlv *tlv, char *message, size_t message_len);
#endif