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main.c
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#include "main.h"
#include "client.h"
#include "tox_bootstrap.h"
#include "tox_bootstrap_json.h"
#include "log.h"
#ifdef __MACH__
#include "mach.h"
#endif
static struct Tox_Options tox_options;
Tox *tox;
int client_socket = 0;
TOX_CONNECTION connection_status = TOX_CONNECTION_NONE;
/** CONFIGURATION OPTIONS **/
/* Whether we're a client */
int client_mode = 0;
/* Just send a ping and exit */
int ping_mode = 0;
/* Open a local port and forward it */
int client_local_port_mode = 0;
/* Forward stdin/stdout to remote machine - SSH ProxyCommand mode */
int client_pipe_mode = 0;
/* Remote Tox ID in client mode */
uint8_t *remote_tox_id = NULL;
/* Tox TCP relay port */
long int tcp_relay_port = 0;
/* UDP listen ports */
long int udp_start_port = 0;
long int udp_end_port = 0;
/* SOCKS5 listen port */
long int socks5_port = 0;
/* Directory with config and tox save */
char config_path[500] = "/etc/tuntox/";
/* Limit hostname and port in server */
int nrules = 0;
char rules_file[500] = "/etc/tuntox/rules";
enum rules_policy_enum rules_policy = NONE;
rule *rules = NULL;
/* Bootstrap json file */
char boot_json[500] = "/etc/tuntox/nodes.json";
/* Ports and hostname for port forwarding */
local_port_forward *local_port_forwards = NULL;
uint32_t last_forward_id;
/* Whether to daemonize/fork after startup */
int daemonize = 0;
/* Path to the pidfile */
char *pidfile = NULL;
/* Username to which we suid() in daemon mode */
char *daemon_username = NULL;
/* Shared secret used for authentication */
int use_shared_secret = 0;
char shared_secret[TOX_MAX_FRIEND_REQUEST_LENGTH];
/* Only let in a whitelisted client */
int server_whitelist_mode = 0;
allowed_toxid *allowed_toxids = NULL;
int load_saved_toxid_in_client_mode = 0;
fd_set master_server_fds;
/* We keep two hash tables: one indexed by sockfd and another by "connection id" */
tunnel *by_id = NULL;
/* Tunnels need to be delete safely, outside FD_ISSET polling */
/* See: tunnel_queue_delete() */
tunnel_list *tunnels_to_delete = NULL;
/* Highest used fd + 1 for select() */
int select_nfds = 4;
/* Generate an unique tunnel ID. To be used in a server. */
uint16_t get_random_tunnel_id()
{
while(1)
{
int key;
uint16_t tunnel_id;
tunnel *tun;
tunnel_id = (uint16_t)rand();
key = tunnel_id;
HASH_FIND_INT(by_id, &key, tun);
if(!tun)
{
return tunnel_id;
}
log_printf(L_WARNING, "[i] Found duplicated tunnel ID %d\n", key);
}
}
/* Comparison function for allowed_toxid objects */
int allowed_toxid_cmp(allowed_toxid *a, allowed_toxid *b)
{
return memcmp(a->toxid, b->toxid, TOX_PUBLIC_KEY_SIZE);
}
/* Match rule r against candidate host, port. Returns 0 for match. */
int rule_match(rule *r, rule *candidate)
{
bool host_match = !strcmp(r->host, "*") || !strcmp(r->host, candidate->host);
bool port_match = r->port == 0 || r->port == candidate->port;
return port_match && host_match ? 0 : -1;
}
/* When a file descriptor has been added to or removed from select() fdset,
* we need to update select_nfds. */
void update_select_nfds(int fd, fd_set *fds, int *old_select_nfds)
{
int new_select_nfds = 0;
if(fd + 1 > *old_select_nfds)
{
*old_select_nfds = fd + 1;
}
for(int i = 0; i < *old_select_nfds; i++)
{
if(FD_ISSET(i, fds))
{
if(i + 1 > new_select_nfds)
{
new_select_nfds = i + 1;
}
}
}
*old_select_nfds = new_select_nfds;
}
void update_master_server_nfds(int fd)
{
update_select_nfds(fd, &master_server_fds, &select_nfds);
}
/* Constructor. Returns NULL on failure. */
tunnel *tunnel_create(int sockfd, int connid, uint32_t friendnumber)
{
tunnel *t = NULL;
t = calloc(1, sizeof(tunnel));
if(!t)
{
return NULL;
}
t->sockfd = sockfd;
t->connid = connid;
t->friendnumber = friendnumber;
log_printf(L_INFO, "Created a new tunnel object connid=%d sockfd=%d\n", connid, sockfd);
update_master_server_nfds(t->sockfd);
HASH_ADD_INT( by_id, connid, t );
return t;
}
/* Please use tunnel_queue_delete() instead */
void tunnel_delete(tunnel *t)
{
log_printf(L_INFO, "Deleting tunnel #%d ptr %p\n", t->connid, t);
if(t->sockfd)
{
if(close(t->sockfd) == -1)
{
log_printf(L_DEBUG, "Failed to close socket: code=%d (%s)\n", errno, strerror(errno));
}
FD_CLR(t->sockfd, &master_server_fds);
update_master_server_nfds(0);
}
HASH_DEL( by_id, t );
free(t);
}
int tunnel_in_delete_queue(tunnel *t)
{
tunnel_list *element;
LL_FOREACH(tunnels_to_delete, element)
{
if(element->tun == t)
{
return 1;
}
}
return 0;
}
/* Delete the tunnel at the end of main loop */
void tunnel_queue_delete(tunnel *t)
{
tunnel_list *tunnel_list_entry = NULL;
if(tunnel_in_delete_queue(t))
{
log_printf(L_DEBUG2, "Did not queue deleting tunnel #%d ptr %p - already queued\n", t->connid, t);
return;
}
log_printf(L_DEBUG2, "Queued deleting tunnel #%d ptr %p\n", t->connid, t);
tunnel_list_entry = calloc(sizeof(tunnel_list), 1);
tunnel_list_entry->tun = t;
LL_APPEND(tunnels_to_delete, tunnel_list_entry);
}
local_port_forward *local_port_forward_create()
{
local_port_forward *forward = calloc(sizeof(local_port_forward), 1);
if(!forward)
{
return NULL;
}
forward->forward_id = ++last_forward_id;
forward->created = time(NULL);
return forward;
}
local_port_forward *find_pending_forward_by_id(uint32_t local_forward_id)
{
local_port_forward *forward;
LL_FOREACH(local_port_forwards, forward)
{
if(forward->forward_id == local_forward_id)
{
return forward;
}
}
return NULL;
}
/* bootstrap to dht with bootstrap_nodes */
/* From uTox/tox.c */
static void do_bootstrap(Tox *tox)
{
static unsigned int j = 0;
if (j == 0)
j = rand();
int i = 0;
while(i < 8) {
struct bootstrap_node *d = &bootstrap_nodes[j % countof(bootstrap_nodes)];
struct bootstrap_node *r = &tcp_relays[(4*j) % countof(tcp_relays)];
tox_bootstrap(tox, d->address, d->port, d->key, 0);
tox_add_tcp_relay(tox, r->address, r->port, r->key, 0);
i++;
j++;
}
}
/* Set username to the machine's FQDN */
void set_tox_username(Tox *tox)
{
char hostname[1024];
TOX_ERR_SET_INFO error;
gethostname((char*)hostname, 1024);
hostname[1023] = '\0';
tox_self_set_name(tox, (uint8_t *)hostname, strlen(hostname), &error);
if(error != TOX_ERR_SET_INFO_OK)
{
log_printf(L_DEBUG, "tox_self_set_name() failed (%u)", error);
}
}
/* Get sockaddr, IPv4 or IPv6 */
void *get_in_addr(struct sockaddr *sa)
{
if (sa->sa_family == AF_INET)
{
return &(((struct sockaddr_in*)sa)->sin_addr);
}
return &(((struct sockaddr_in6*)sa)->sin6_addr);
}
/* Connect to an endpoint, return sockfd */
int get_client_socket(char *hostname, int port)
{
int sockfd;
struct addrinfo hints, *servinfo, *p;
int rv;
char s[INET6_ADDRSTRLEN];
char port_str[6];
snprintf(port_str, 6, "%d", port);
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
if ((rv = getaddrinfo(hostname, port_str, &hints, &servinfo)) != 0)
{
/* Add a special case for "localhost" when name resolution is broken */
if(!strncmp("localhost", hostname, 256))
{
const char localhostname[] = "127.0.0.1";
if ((rv = getaddrinfo(localhostname, port_str, &hints, &servinfo)) != 0) {
log_printf(L_WARNING, "getaddrinfo failed for 127.0.0.1: %s\n", gai_strerror(rv));
return -1;
}
}
else
{
log_printf(L_WARNING, "getaddrinfo: %s\n", gai_strerror(rv));
return -1;
}
}
// loop through all the results and connect to the first we can
for(p = servinfo; p != NULL; p = p->ai_next)
{
if (p->ai_family != AF_INET && p->ai_family != AF_INET6)
continue;
if ((sockfd = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1) {
perror("client: socket");
continue;
}
if (connect(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
close(sockfd);
perror("client: connect");
continue;
}
break;
}
if (p == NULL) {
log_printf(L_WARNING, "failed to connect to %s:%d\n", hostname, port);
freeaddrinfo(servinfo);
return -1;
}
inet_ntop(p->ai_family, get_in_addr((struct sockaddr *)p->ai_addr), s, sizeof s);
log_printf(L_DEBUG, "connecting to %s\n", s);
freeaddrinfo(servinfo); // all done with this structure
log_printf(L_DEBUG, "Connected to %s:%d\n", hostname, port);
return sockfd;
}
/* Proto - our protocol handling */
/*
* send_frame: (almost) zero-copy. Overwrites first PROTOCOL_BUFFER_OFFSET bytes of data
* so actual data should start at position PROTOCOL_BUFFER_OFFSET
*/
int send_frame(protocol_frame *frame, uint8_t *data)
{
int rv = -1;
int try = 0;
int i;
TOX_ERR_FRIEND_CUSTOM_PACKET custom_packet_error;
data[0] = PROTOCOL_MAGIC_HIGH;
data[1] = PROTOCOL_MAGIC_LOW;
data[2] = BYTE2(frame->packet_type);
data[3] = BYTE1(frame->packet_type);
data[4] = BYTE2(frame->connid);
data[5] = BYTE1(frame->connid);
data[6] = BYTE2(frame->data_length);
data[7] = BYTE1(frame->data_length);
for(i = 0; i < 33;) /* 2.667 seconds per packet max */
{
int j;
try++;
rv = tox_friend_send_lossless_packet(
tox,
frame->friendnumber,
data,
frame->data_length + PROTOCOL_BUFFER_OFFSET,
&custom_packet_error
);
if(custom_packet_error == TOX_ERR_FRIEND_CUSTOM_PACKET_OK)
{
break;
}
else
{
/* If this branch is ran, most likely we've hit congestion control. */
if(custom_packet_error == TOX_ERR_FRIEND_CUSTOM_PACKET_SENDQ)
{
log_printf(L_DEBUG, "[%d] Failed to send packet to friend %d (Packet queue is full)\n", i, frame->friendnumber);
}
else if(custom_packet_error == TOX_ERR_FRIEND_CUSTOM_PACKET_FRIEND_NOT_CONNECTED)
{
log_printf(L_DEBUG, "[%d] Failed to send packet to friend %d (Friend gone)\n", i, frame->friendnumber);
break;
}
else
{
log_printf(L_DEBUG, "[%d] Failed to send packet to friend %d (err: %u)\n", i, frame->friendnumber, custom_packet_error);
}
}
if(i == 0) i = 2;
else i = i * 2;
for(j = 0; j < i; j++)
{
tox_iterate(tox, NULL);
usleep(j * 1000);
}
}
if(i > 0 && rv >= 0)
{
log_printf(L_DEBUG, "Packet succeeded at try %d (friend %d tunnel %d)\n", try, frame->friendnumber, frame->connid);
}
return rv;
}
int send_tunnel_ack_frame(tunnel *tun, uint32_t remote_forward_id)
{
protocol_frame frame_st;
protocol_frame *frame;
uint8_t *data = NULL;
frame = &frame_st;
memset(frame, 0, sizeof(protocol_frame));
frame->packet_type = PACKET_TYPE_ACKTUNNEL;
frame->connid = tun->connid;
frame->data_length = 4;
frame->friendnumber = tun->friendnumber;
data = calloc(PROTOCOL_BUFFER_OFFSET + frame->data_length, 1);
data[PROTOCOL_BUFFER_OFFSET+3] = BYTE1(remote_forward_id);
data[PROTOCOL_BUFFER_OFFSET+2] = BYTE2(remote_forward_id);
data[PROTOCOL_BUFFER_OFFSET+1] = BYTE3(remote_forward_id);
data[PROTOCOL_BUFFER_OFFSET] = BYTE4(remote_forward_id);
return send_frame(frame, data);
}
int handle_ping_frame(protocol_frame *rcvd_frame)
{
uint8_t data[TOX_MAX_CUSTOM_PACKET_SIZE];
protocol_frame frame_s;
protocol_frame *frame = &frame_s;
frame->data = data + PROTOCOL_BUFFER_OFFSET;
memcpy(frame->data, rcvd_frame->data, rcvd_frame->data_length);
frame->friendnumber = rcvd_frame->friendnumber;
frame->packet_type = PACKET_TYPE_PONG;
frame->data_length = rcvd_frame->data_length;
send_frame(frame, data);
return 0;
}
int handle_request_tunnel_frame(protocol_frame *rcvd_frame)
{
char *hostname = NULL;
tunnel *tun;
int port = -1;
int sockfd = 0;
uint16_t tunnel_id;
/* Client-side ID of the tunnel */
uint32_t remote_forward_id;
if(client_mode)
{
log_printf(L_WARNING, "Got tunnel request frame from friend #%d when in client mode\n", rcvd_frame->friendnumber);
return -1;
}
port = rcvd_frame->connid;
hostname = calloc(1, rcvd_frame->data_length + 1);
if(!hostname)
{
log_printf(L_ERROR, "Could not allocate memory for tunnel request hostname\n");
return -1;
}
remote_forward_id = INT32_AT(rcvd_frame->data, 0);
strncpy(hostname, ((char *)rcvd_frame->data) + 4, rcvd_frame->data_length - 4);
hostname[rcvd_frame->data_length] = '\0';
log_printf(L_INFO, "Got a request to forward data from %s:%d\n", hostname, port);
// check rules
if (rules_policy == VALIDATE && nrules > 0 ) {
rule temp_rule, *found = NULL;
temp_rule.host = hostname;
temp_rule.port = port;
LL_SEARCH(rules, found, &temp_rule, rule_match);
if(!found)
{
log_printf(L_WARNING, "Rejected, request not in rules\n");
if(hostname)
{
free(hostname);
}
return -1;
}
} else if (rules_policy != NONE) {
log_printf(L_WARNING, "Filter option active but no allowed host/port. All requests will be dropped.\n");
if(hostname)
{
free(hostname);
}
return -1;
}
tunnel_id = get_random_tunnel_id();
log_printf(L_DEBUG, "Tunnel ID: %d\n", tunnel_id);
sockfd = get_client_socket(hostname, port);
if(sockfd >= 0)
{
tun = tunnel_create(sockfd, tunnel_id, rcvd_frame->friendnumber);
if(tun)
{
FD_SET(sockfd, &master_server_fds);
update_master_server_nfds(sockfd);
log_printf(L_DEBUG, "Created tunnel, yay!\n");
send_tunnel_ack_frame(tun, remote_forward_id);
}
else
{
log_printf(L_ERROR, "Couldn't allocate memory for tunnel\n");
close(sockfd);
}
}
else
{
log_printf(L_WARNING, "Could not connect to %s:%d\n", hostname, port);
/* TODO send PACKET_TYPE_REQUESTTUNNEL */
}
free(hostname);
return 0;
}
/* Handle a TCP frame received from client */
int handle_client_tcp_frame(protocol_frame *rcvd_frame)
{
tunnel *tun=NULL;
int offset = 0;
int connid = rcvd_frame->connid;
HASH_FIND_INT(by_id, &connid, tun);
if(!tun)
{
log_printf(L_WARNING, "Got TCP frame with unknown tunnel ID %d\n", rcvd_frame->connid);
return -1;
}
if(tun->friendnumber != rcvd_frame->friendnumber)
{
log_printf(L_WARNING, "Friend #%d tried to send packet to a tunnel which belongs to #%d\n", rcvd_frame->friendnumber, tun->friendnumber);
return -1;
}
while(offset < rcvd_frame->data_length)
{
int sent_bytes;
sent_bytes = send(
tun->sockfd,
rcvd_frame->data + offset,
rcvd_frame->data_length - offset,
MSG_NOSIGNAL
);
if(sent_bytes < 0)
{
log_printf(L_WARNING, "Could not write to socket %d: %s\n", tun->sockfd, strerror(errno));
return -1;
}
log_printf(L_DEBUG2, "Sent %d bytes to tunnel %d\n", sent_bytes, tun->sockfd);
offset += sent_bytes;
}
return 0;
}
/* Handle close-tunnel frame received from the client */
int handle_client_tcp_fin_frame(protocol_frame *rcvd_frame)
{
tunnel *tun=NULL;
int connid = rcvd_frame->connid;
HASH_FIND_INT(by_id, &connid, tun);
if(!tun)
{
log_printf(L_WARNING, "Got TCP FIN frame with unknown tunnel ID %d\n", rcvd_frame->connid);
return -1;
}
if(tun->friendnumber != rcvd_frame->friendnumber)
{
log_printf(L_WARNING, "Friend #%d tried to close tunnel which belongs to #%d\n", rcvd_frame->friendnumber, tun->friendnumber);
return -1;
}
log_printf(L_DEBUG2, "Deleting tunnel #%d (%p) in handle_client_tcp_fin_frame(), socket %d", rcvd_frame->connid, tun, tun->sockfd);
tunnel_queue_delete(tun);
return 0;
}
/* This is a dispatcher for our encapsulated protocol */
int handle_frame(protocol_frame *frame)
{
switch(frame->packet_type)
{
case PACKET_TYPE_PING:
return handle_ping_frame(frame);
break;
case PACKET_TYPE_PONG:
return handle_pong_frame(frame);
break;
case PACKET_TYPE_TCP:
if(client_mode)
{
return handle_server_tcp_frame(frame);
}
else
{
return handle_client_tcp_frame(frame);
}
break;
case PACKET_TYPE_REQUESTTUNNEL:
handle_request_tunnel_frame(frame);
break;
case PACKET_TYPE_ACKTUNNEL:
handle_acktunnel_frame(frame);
break;
case PACKET_TYPE_TCP_FIN:
if(client_mode)
{
return handle_server_tcp_fin_frame(frame);
}
else
{
return handle_client_tcp_fin_frame(frame);
}
break;
default:
log_printf(L_DEBUG, "Got unknown packet type 0x%x from friend %d\n",
frame->packet_type,
frame->friendnumber
);
}
return 0;
}
/*
* This is a callback which gets a packet from Tox core.
* It checks for basic inconsistiencies and allocates the
* protocol_frame structure.
*/
void parse_lossless_packet(Tox *tox, uint32_t friendnumber, const uint8_t *data, size_t len, void *tmp)
{
protocol_frame *frame = NULL;
if(len < PROTOCOL_BUFFER_OFFSET)
{
log_printf(L_WARNING, "Received too short data frame - only %d bytes, at least %d expected\n", len, PROTOCOL_BUFFER_OFFSET);
return;
}
if(!data)
{
log_printf(L_ERROR, "Got NULL pointer from toxcore - WTF?\n");
return;
}
if(data[0] != PROTOCOL_MAGIC_HIGH || data[1] != PROTOCOL_MAGIC_LOW)
{
log_printf(L_WARNING, "Received data frame with invalid protocol magic number 0x%x%x\n", data[0], data[1]);
if(data[0] == (PROTOCOL_MAGIC_V1 >> 8) && data[1] == (PROTOCOL_MAGIC_V1 & 0xff))
{
log_printf(L_ERROR, "Tuntox on the other end uses old protocol version 1. Please upgrade it.");
}
return;
}
frame = calloc(1, sizeof(protocol_frame));
if(!frame)
{
log_printf(L_ERROR, "Could not allocate memory for protocol_frame_t\n");
return;
}
/* TODO check if friendnumber is the same in sender and connid tunnel*/
frame->magic = INT16_AT(data, 0);
frame->packet_type = INT16_AT(data, 2);
frame->connid = INT16_AT(data, 4);
frame->data_length = INT16_AT(data, 6);
frame->data = (uint8_t *)(data + PROTOCOL_BUFFER_OFFSET);
frame->friendnumber = friendnumber;
log_printf(L_DEBUG, "Got protocol frame magic 0x%x type 0x%x from friend %d\n", frame->magic, frame->packet_type, frame->friendnumber);
if(len < (size_t)frame->data_length + PROTOCOL_BUFFER_OFFSET)
{
log_printf(L_WARNING, "Received frame too small (attempted buffer overflow?): %d bytes, excepted at least %d bytes\n", len, frame->data_length + PROTOCOL_BUFFER_OFFSET);
free(frame);
return;
}
if(frame->data_length > (TOX_MAX_CUSTOM_PACKET_SIZE - PROTOCOL_BUFFER_OFFSET))
{
log_printf(L_WARNING, "Declared data length too big (attempted buffer overflow?): %d bytes, excepted at most %d bytes\n", frame->data_length, (TOX_MAX_CUSTOM_PACKET_SIZE - PROTOCOL_BUFFER_OFFSET));
free(frame);
return;
}
handle_frame(frame);
free(frame);
}
int send_tunnel_request_packet(char *remote_host, int remote_port, uint32_t local_forward_id, int friend_number)
{
int packet_length = 0;
protocol_frame frame_i, *frame;
uint8_t *data = NULL;
log_printf(L_INFO, "Sending packet to friend #%d to forward %s:%d\n", friend_number, remote_host, remote_port);
packet_length = PROTOCOL_BUFFER_OFFSET + strlen(remote_host) + 4;
if(packet_length > TOX_MAX_CUSTOM_PACKET_SIZE)
{
log_printf(L_WARNING, "Not requesting port forward - host name %s is too long", remote_host);
}
frame = &frame_i;
data = calloc(1, packet_length);
if(!data)
{
log_printf(L_ERROR, "Could not allocate memory for tunnel request packet\n");
exit(1);
}
data[PROTOCOL_BUFFER_OFFSET+3] = BYTE1(local_forward_id);
data[PROTOCOL_BUFFER_OFFSET+2] = BYTE2(local_forward_id);
data[PROTOCOL_BUFFER_OFFSET+1] = BYTE3(local_forward_id);
data[PROTOCOL_BUFFER_OFFSET] = BYTE4(local_forward_id);
memcpy((char *)data+PROTOCOL_BUFFER_OFFSET+4, remote_host, strlen(remote_host));
frame->friendnumber = friend_number;
frame->packet_type = PACKET_TYPE_REQUESTTUNNEL;
frame->connid = remote_port;
frame->data_length = strlen(remote_host) + 4;
send_frame(frame, data);
free(data);
return 0;
}
/* End proto */
/* Save tox identity to a file */
static void write_save(Tox *tox)
{
void *data;
uint32_t size;
uint8_t path_tmp[512], path_real[512], *p;
FILE *file;
size = tox_get_savedata_size(tox);
data = malloc(size);
tox_get_savedata(tox, data);
strncpy((char *)path_real, config_path, sizeof(path_real));
p = path_real + strlen((char *)path_real);
memcpy(p, "tox_save", sizeof("tox_save"));
unsigned int path_len = (p - path_real) + sizeof("tox_save");
memcpy(path_tmp, path_real, path_len);
memcpy(path_tmp + (path_len - 1), ".tmp", sizeof(".tmp"));
file = fopen((char*)path_tmp, "wb");
if(file) {
fwrite(data, size, 1, file);
fflush(file);
fclose(file);
if (rename((char*)path_tmp, (char*)path_real) != 0) {
log_printf(L_WARNING, "Failed to rename file. %s to %s deleting and trying again\n", path_tmp, path_real);
if(remove((const char *)path_real) < 0) {
log_printf(L_WARNING, "Failed to remove old save file %s\n", path_real);
}
if (rename((char*)path_tmp, (char*)path_real) != 0) {
log_printf(L_WARNING, "Saving Failed\n");
} else {
log_printf(L_DEBUG, "Saved data\n");
}
} else {
log_printf(L_DEBUG, "Saved data\n");
}
}
else
{
log_printf(L_WARNING, "Could not open save file\n");
}
free(data);
}
/* Load tox identity from a file */
static size_t load_save(uint8_t **out_data)
{
void *data;
uint32_t size;
uint8_t path_real[512], *p;
strncpy((char *)path_real, config_path, sizeof(path_real));
p = path_real + strlen((char *)path_real);
memcpy(p, "tox_save", sizeof("tox_save"));
data = file_raw((char *)path_real, &size);
if(data)
{
*out_data = data;
return size;
}
else
{
log_printf(L_WARNING, "Could not open save file\n");
return 0;
}
}
/* Loads a list of allowed hostnames and ports from file. Format is hostname:port*/
void load_rules()
{
char *ahost=NULL;
int aport=0;
char line[100 + 1] = "";
FILE *file = NULL;
rule *rule_obj = NULL;
int valid_rules = 0;
file = fopen(rules_file, "r");
if (file == NULL) {
log_printf(L_WARNING, "Could not open rules file (%s)\n", rules_file);
return;
}
while (fgets(line, sizeof(line), file)) {
/* allow comments & white lines */
if (line[0]=='#'||line[0]=='\n') {
continue;
}
if (parse_pipe_port_forward(line, &ahost, &aport) >= 0) {
if (aport > 0 && aport < 65535) {
rule_obj = (rule *)calloc(sizeof(rule), 1);
if(!rule_obj)
{
log_printf(L_ERROR, "Could not allocate memory for rule");
exit(1);
}
rule_obj->port = aport;
rule_obj->host = strdup(ahost);
LL_APPEND(rules, rule_obj);
valid_rules++;
} else {
log_printf(L_WARNING, "Invalid port in line: %s\n", line);
}
} else {
log_printf(L_WARNING, "Could not parse line: %s\n", line);
}
}
fclose(file);
/* save valid rules in global variable */
nrules = valid_rules;
log_printf(L_INFO, "Loaded %d rules\n", nrules);
if (nrules==0 && rules_policy != NONE){
log_printf(L_WARNING, "No rules loaded! NO CONNECTIONS WILL BE ALLOWED!\n");
}
}
/* Clear rules loaded into memory */
void clear_rules()
{
rule * elt, *tmp;
/* delete each elemen using the safe iterator */
LL_FOREACH_SAFE(rules,elt,tmp) {
LL_DELETE(rules,elt);
free(elt->host);
free(elt);
}
}
void accept_friend_request(Tox *tox, const uint8_t *public_key, const uint8_t *message, size_t length, void *userdata)
{
unsigned char tox_printable_id[TOX_ADDRESS_SIZE * 2 + 1];
uint32_t friendnumber;
TOX_ERR_FRIEND_ADD friend_add_error;
log_printf(L_DEBUG, "Got friend request\n");
if(use_shared_secret)
{
if(!message)
{
log_printf(L_WARNING, "Friend sent NULL message - not accepting request");
return;
}
if(message[length - 1] != '\0')
{
log_printf(L_WARNING, "Message of size %u is not NULL terminated - not accepting request", length);
return;
}
if(strncmp((char *)message, shared_secret, TOX_MAX_FRIEND_REQUEST_LENGTH-1))
{
log_printf(L_WARNING, "Received shared secret \"%s\" differs from our shared secret - not accepting request", message);
return;
}
}
memset(tox_printable_id, '\0', sizeof(tox_printable_id));
id_to_string(tox_printable_id, public_key);
if(server_whitelist_mode)
{
allowed_toxid etmp, *found = NULL;
memcpy(etmp.toxid, public_key, TOX_PUBLIC_KEY_SIZE);
LL_SEARCH(allowed_toxids, found, &etmp, allowed_toxid_cmp);
if(!found)
{
log_printf(L_WARNING, "Rejected friend request from non-whitelisted friend %s", tox_printable_id);
return;
}
log_printf(L_DEBUG, "Friend %s passed whitelist check", tox_printable_id);
}
friendnumber = tox_friend_add_norequest(tox, public_key, &friend_add_error);
if(friend_add_error != TOX_ERR_FRIEND_ADD_OK)
{
log_printf(L_WARNING, "Could not add friend: err %u", friend_add_error);
return;
}
log_printf(L_INFO, "Accepted friend request from %s as %d\n", tox_printable_id, friendnumber);
}
/* Callback for tox_callback_self_connection_status() */
void handle_connection_status_change(Tox *tox, TOX_CONNECTION p_connection_status, void *user_data)
{