static void
set_socket_buffers (int fd, int large)
{
int size, rbuf, sbuf, rc;
socklen_t rbuf_len = sizeof (rbuf), sbuf_len = sizeof (sbuf);
size = large ? RECV_BUFFER_SIZE : SMALL_BUFFER_SIZE;
rc = setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
if (rc < 0)
tr_nerr ("UDP", "Failed to set receive buffer: %s",
tr_strerror (errno));
size = large ? SEND_BUFFER_SIZE : SMALL_BUFFER_SIZE;
rc = setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size));
if (rc < 0)
tr_nerr ("UDP", "Failed to set send buffer: %s",
tr_strerror (errno));
if (large) {
rc = getsockopt (fd, SOL_SOCKET, SO_RCVBUF, &rbuf, &rbuf_len);
if (rc < 0)
rbuf = 0;
rc = getsockopt (fd, SOL_SOCKET, SO_SNDBUF, &sbuf, &sbuf_len);
if (rc < 0)
sbuf = 0;
if (rbuf < RECV_BUFFER_SIZE) {
tr_nerr ("UDP", "Failed to set receive buffer: requested %d, got %d",
RECV_BUFFER_SIZE, rbuf);
#ifdef __linux__
tr_ninf ("UDP",
"Please add the line "
"\"net.core.rmem_max = %d\" to /etc/sysctl.conf",
RECV_BUFFER_SIZE);
#endif
}
if (sbuf < SEND_BUFFER_SIZE) {
tr_nerr ("UDP", "Failed to set send buffer: requested %d, got %d",
SEND_BUFFER_SIZE, sbuf);
#ifdef __linux__
tr_ninf ("UDP",
"Please add the line "
"\"net.core.wmem_max = %d\" to /etc/sysctl.conf",
SEND_BUFFER_SIZE);
#endif
}
}
}
static void
bootstrap_from_name( const char *name, tr_port port, int af )
{
struct addrinfo hints, *info, *infop;
char pp[10];
int rc;
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_DGRAM;
hints.ai_family = af;
/* No, just passing p + 1 to gai won't work. */
tr_snprintf(pp, sizeof(pp), "%d", (int)port);
rc = getaddrinfo(name, pp, &hints, &info);
if(rc != 0) {
tr_nerr("DHT", "%s:%s: %s", name, pp, gai_strerror(rc));
return;
}
infop = info;
while(infop) {
dht_ping_node(infop->ai_addr, infop->ai_addrlen);
nap(15);
if(bootstrap_done(session, af))
break;
infop = infop->ai_next;
}
freeaddrinfo(info);
}
void
UTP_RBDrained(struct UTPSocket *socket)
{
tr_nerr( MY_NAME, "UTP_RBDrained(%p) was called.", socket );
dbgmsg( "UTP_RBDrained(%p) was called.", socket );
assert( 0 ); /* FIXME: this is too much for the long term, but probably needed in the short term */
}
bool
UTP_Write(struct UTPSocket *socket, size_t count)
{
tr_nerr( MY_NAME, "UTP_RBDrained(%p, %u) was called.", socket, count );
dbgmsg( "UTP_RBDrained(%p, %u) was called.", socket, count );
assert( 0 ); /* FIXME: this is too much for the long term, but probably needed in the short term */
return false;
}
/* this is for really old versions of T and will probably be removed someday */
void
tr_metainfoMigrate( tr_session * session,
tr_info * inf )
{
struct stat new_sb;
char * name = getTorrentFilename( session, inf );
if( stat( name, &new_sb ) || ( ( new_sb.st_mode & S_IFMT ) != S_IFREG ) )
{
char * old_name = getOldTorrentFilename( session, inf );
size_t contentLen;
uint8_t * content;
tr_mkdirp( tr_getTorrentDir( session ), 0777 );
if( ( content = tr_loadFile( old_name, &contentLen ) ) )
{
FILE * out;
errno = 0;
out = fopen( name, "wb+" );
if( !out )
{
tr_nerr( inf->name, _( "Couldn't create \"%1$s\": %2$s" ),
name, tr_strerror( errno ) );
}
else
{
if( fwrite( content, sizeof( uint8_t ), contentLen, out )
== contentLen )
{
tr_free( inf->torrent );
inf->torrent = tr_strdup( name );
tr_sessionSetTorrentFile( session, inf->hashString, name );
unlink( old_name );
}
fclose( out );
}
}
tr_free( content );
tr_free( old_name );
}
tr_free( name );
}
void
tr_udpInit (tr_session *ss)
{
bool is_default;
const struct tr_address * public_addr;
struct sockaddr_in sin;
int rc;
assert (ss->udp_socket < 0);
assert (ss->udp6_socket < 0);
ss->udp_port = tr_sessionGetPeerPort (ss);
if (ss->udp_port <= 0)
return;
ss->udp_socket = socket (PF_INET, SOCK_DGRAM, 0);
if (ss->udp_socket < 0) {
tr_nerr ("UDP", "Couldn't create IPv4 socket");
goto ipv6;
}
memset (&sin, 0, sizeof (sin));
sin.sin_family = AF_INET;
public_addr = tr_sessionGetPublicAddress (ss, TR_AF_INET, &is_default);
if (public_addr && !is_default)
memcpy (&sin.sin_addr, &public_addr->addr.addr4, sizeof (struct in_addr));
sin.sin_port = htons (ss->udp_port);
rc = bind (ss->udp_socket, (struct sockaddr*)&sin, sizeof (sin));
if (rc < 0) {
tr_nerr ("UDP", "Couldn't bind IPv4 socket");
close (ss->udp_socket);
ss->udp_socket = -1;
goto ipv6;
}
ss->udp_event =
event_new (ss->event_base, ss->udp_socket, EV_READ | EV_PERSIST,
event_callback, ss);
if (ss->udp_event == NULL)
tr_nerr ("UDP", "Couldn't allocate IPv4 event");
ipv6:
if (tr_globalIPv6 ())
rebind_ipv6 (ss, true);
if (ss->udp6_socket >= 0) {
ss->udp6_event =
event_new (ss->event_base, ss->udp6_socket, EV_READ | EV_PERSIST,
event_callback, ss);
if (ss->udp6_event == NULL)
tr_nerr ("UDP", "Couldn't allocate IPv6 event");
}
tr_udpSetSocketBuffers (ss);
if (ss->isDHTEnabled)
tr_dhtInit (ss);
if (ss->udp_event)
event_add (ss->udp_event, NULL);
if (ss->udp6_event)
event_add (ss->udp6_event, NULL);
}
static void
rebind_ipv6 (tr_session *ss, bool force)
{
bool is_default;
const struct tr_address * public_addr;
struct sockaddr_in6 sin6;
const unsigned char *ipv6 = tr_globalIPv6 ();
int s = -1, rc;
int one = 1;
/* We currently have no way to enable or disable IPv6 after initialisation.
No way to fix that without some surgery to the DHT code itself. */
if (ipv6 == NULL || (!force && ss->udp6_socket < 0)) {
if (ss->udp6_bound) {
free (ss->udp6_bound);
ss->udp6_bound = NULL;
}
return;
}
if (ss->udp6_bound != NULL && memcmp (ipv6, ss->udp6_bound, 16) == 0)
return;
s = socket (PF_INET6, SOCK_DGRAM, 0);
if (s < 0)
goto fail;
#ifdef IPV6_V6ONLY
/* Since we always open an IPv4 socket on the same port, this
shouldn't matter. But I'm superstitious. */
setsockopt (s, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof (one));
#endif
memset (&sin6, 0, sizeof (sin6));
sin6.sin6_family = AF_INET6;
if (ipv6)
memcpy (&sin6.sin6_addr, ipv6, 16);
sin6.sin6_port = htons (ss->udp_port);
public_addr = tr_sessionGetPublicAddress (ss, TR_AF_INET6, &is_default);
if (public_addr && !is_default)
sin6.sin6_addr = public_addr->addr.addr6;
rc = bind (s, (struct sockaddr*)&sin6, sizeof (sin6));
if (rc < 0)
goto fail;
if (ss->udp6_socket < 0) {
ss->udp6_socket = s;
} else {
rc = dup2 (s, ss->udp6_socket);
if (rc < 0)
goto fail;
close (s);
}
if (ss->udp6_bound == NULL)
ss->udp6_bound = malloc (16);
if (ss->udp6_bound)
memcpy (ss->udp6_bound, ipv6, 16);
return;
fail:
/* Something went wrong. It's difficult to recover, so let's simply
set things up so that we try again next time. */
tr_nerr ("UDP", "Couldn't rebind IPv6 socket");
if (s >= 0)
close (s);
if (ss->udp6_bound) {
free (ss->udp6_bound);
ss->udp6_bound = NULL;
}
}
static void
dht_bootstrap(void *closure)
{
struct bootstrap_closure *cl = closure;
int i;
int num = cl->len / 6, num6 = cl->len6 / 18;
if(session != cl->session)
return;
if(cl->len > 0)
tr_ninf( "DHT", "Bootstrapping from %d nodes", num );
if(cl->len6 > 0)
tr_ninf( "DHT", "Bootstrapping from %d IPv6 nodes", num6 );
for(i = 0; i < MAX(num, num6); i++) {
if( i < num && !bootstrap_done(cl->session, AF_INET) ) {
tr_port port;
struct tr_address addr;
memset(&addr, 0, sizeof(addr));
addr.type = TR_AF_INET;
memcpy(&addr.addr.addr4, &cl->nodes[i * 6], 4);
memcpy(&port, &cl->nodes[i * 6 + 4], 2);
port = ntohs(port);
tr_dhtAddNode(cl->session, &addr, port, 1);
}
if( i < num6 && !bootstrap_done(cl->session, AF_INET6) ) {
tr_port port;
struct tr_address addr;
memset(&addr, 0, sizeof(addr));
addr.type = TR_AF_INET6;
memcpy(&addr.addr.addr6, &cl->nodes6[i * 18], 16);
memcpy(&port, &cl->nodes6[i * 18 + 16], 2);
port = ntohs(port);
tr_dhtAddNode(cl->session, &addr, port, 1);
}
/* Our DHT code is able to take up to 9 nodes in a row without
dropping any. After that, it takes some time to split buckets.
So ping the first 8 nodes quickly, then slow down. */
if(i < 8)
nap(2);
else
nap(15);
if(bootstrap_done( session, 0 ))
break;
}
if(!bootstrap_done(cl->session, 0)) {
char *bootstrap_file;
FILE *f = NULL;
bootstrap_file =
tr_buildPath(cl->session->configDir, "dht.bootstrap", NULL);
if(bootstrap_file)
f = fopen(bootstrap_file, "rb");
if(f != NULL) {
tr_ninf("DHT", "Attempting manual bootstrap");
for(;;) {
char buf[201];
char *p;
int port = 0;
p = fgets(buf, 200, f);
if( p == NULL )
break;
p = memchr(buf, ' ', strlen(buf));
if(p != NULL)
port = atoi(p + 1);
if(p == NULL || port <= 0 || port >= 0x10000) {
tr_nerr("DHT", "Couldn't parse %s", buf);
continue;
}
*p = '\0';
bootstrap_from_name( buf, port, bootstrap_af(session) );
if(bootstrap_done(cl->session, 0))
break;
}
}
tr_free( bootstrap_file );
}
/* We really don't want to abuse our bootstrap nodes.
Be glacially slow. */
if(!bootstrap_done(cl->session, 0))
nap(30);
if(!bootstrap_done(cl->session, 0)) {
tr_ninf("DHT", "Attempting bootstrap from dht.transmissionbt.com");
bootstrap_from_name( "dht.transmissionbt.com", 6881,
bootstrap_af(session) );
}
if( cl->nodes )
tr_free( cl->nodes );
if( cl->nodes6 )
tr_free( cl->nodes6 );
tr_free( closure );
tr_ndbg( "DHT", "Finished bootstrapping" );
}