(s)->stream_context); \
} while(0)
+static void silc_packet_dispatch(SilcPacket packet);
+static void silc_packet_read_process(SilcPacketStream stream);
+static inline SilcBool silc_packet_send_raw(SilcPacketStream stream,
+ SilcPacketType type,
+ SilcPacketFlags flags,
+ SilcIdType src_id_type,
+ unsigned char *src_id,
+ SilcUInt32 src_id_len,
+ SilcIdType dst_id_type,
+ unsigned char *dst_id,
+ SilcUInt32 dst_id_len,
+ const unsigned char *data,
+ SilcUInt32 data_len,
+ SilcCipher cipher,
+ SilcHmac hmac);
/************************ Static utility functions **************************/
-static void silc_packet_read_process(SilcPacketStream stream);
+/* Injects packet to new stream created with silc_packet_stream_add_remote. */
+
+SILC_TASK_CALLBACK(silc_packet_stream_inject_packet)
+{
+ SilcPacket packet = context;
+ SilcPacketStream stream = packet->stream;
+
+ SILC_LOG_DEBUG(("Injecting packet %p to stream %p", packet, packet->stream));
+
+ silc_mutex_lock(stream->lock);
+ silc_packet_dispatch(packet);
+ silc_mutex_unlock(stream->lock);
+}
/* Write data to the stream. Must be called with ps->lock locked. Unlocks
- the lock inside this function. */
+ the lock inside this function, unless no_unlock is TRUE. Unlocks always
+ in case it returns FALSE. */
-static inline SilcBool silc_packet_stream_write(SilcPacketStream ps)
+static inline SilcBool silc_packet_stream_write(SilcPacketStream ps,
+ SilcBool no_unlock)
{
SilcStream stream;
SilcBool connected;
if (i == -2) {
/* Error */
silc_buffer_reset(&ps->outbuf);
- silc_mutex_unlock(ps->lock);
SILC_PACKET_CALLBACK_ERROR(ps, SILC_PACKET_ERR_WRITE);
return FALSE;
}
if (i == -1) {
/* Cannot write now, write later. */
- silc_mutex_unlock(ps->lock);
+ if (!no_unlock)
+ silc_mutex_unlock(ps->lock);
return TRUE;
}
}
silc_buffer_reset(&ps->outbuf);
- silc_mutex_unlock(ps->lock);
+ if (!no_unlock)
+ silc_mutex_unlock(ps->lock);
return TRUE;
}
if (i == -1) {
/* Cannot write now, write later. */
- silc_mutex_unlock(ps->lock);
+ if (!no_unlock)
+ silc_mutex_unlock(ps->lock);
return TRUE;
}
}
silc_buffer_reset(&ps->outbuf);
- silc_mutex_unlock(ps->lock);
+ if (!no_unlock)
+ silc_mutex_unlock(ps->lock);
return TRUE;
}
}
/* Save sender IP and port */
+ silc_free(ps->remote_udp->remote_ip);
ps->remote_udp->remote_ip = strdup(remote_ip);
ps->remote_udp->remote_port = remote_port;
}
/* Write pending data to stream */
- silc_packet_stream_write(ps);
+ silc_packet_stream_write(ps, FALSE);
break;
case SILC_STREAM_CAN_READ:
SilcPacketStream silc_packet_stream_add_remote(SilcPacketStream stream,
const char *remote_ip,
- SilcUInt16 remote_port)
+ SilcUInt16 remote_port,
+ SilcPacket packet)
{
SilcPacketEngine engine = stream->engine;
SilcPacketStream ps;
return NULL;
}
+ if (packet) {
+ /* Inject packet to the new stream */
+ packet->stream = ps;
+ silc_schedule_task_add_timeout(silc_stream_get_schedule(stream->stream),
+ silc_packet_stream_inject_packet, packet,
+ 0, 0);
+ }
+
return ps;
}
silc_buffer_purge(&stream->inbuf);
silc_buffer_purge(&stream->outbuf);
+ if (stream->process) {
+ SilcPacketProcess p;
+ silc_dlist_start(stream->process);
+ while ((p = silc_dlist_get(stream->process))) {
+ silc_free(p->types);
+ silc_free(p);
+ silc_dlist_del(stream->process, p);
+ }
+ silc_dlist_uninit(stream->process);
+ }
+
/* XXX */
silc_atomic_uninit8(&stream->refcnt);
- silc_dlist_uninit(stream->process);
silc_mutex_free(stream->lock);
silc_free(stream);
}
if (p->callbacks == callbacks &&
p->callback_context == callback_context) {
silc_dlist_del(stream->process, p);
+ silc_free(p->types);
silc_free(p);
break;
}
silc_packet_stream_unref(stream);
}
+/* Returns TRUE if stream is UDP stream */
+
+SilcBool silc_packet_stream_is_udp(SilcPacketStream stream)
+{
+ return stream->udp || silc_socket_stream_is_udp(stream->stream, NULL);
+}
+
/* Return packet sender IP and port for UDP packet stream */
-SilcBool silc_packet_stream_get_sender(SilcPacketStream stream,
- const char **sender_ip,
- SilcUInt16 *sender_port)
+SilcBool silc_packet_get_sender(SilcPacket packet,
+ const char **sender_ip,
+ SilcUInt16 *sender_port)
{
- if (!stream->remote_udp)
+ if (!packet->stream->remote_udp)
return FALSE;
- *sender_ip = stream->remote_udp->remote_ip;
- *sender_port = stream->remote_udp->remote_port;
+ *sender_ip = packet->stream->remote_udp->remote_ip;
+ *sender_port = packet->stream->remote_udp->remote_port;
return TRUE;
}
return stream->stream;
}
-/* Set ciphers for packet stream */
+/* Set keys. */
-void silc_packet_set_ciphers(SilcPacketStream stream, SilcCipher send,
- SilcCipher receive)
+SilcBool silc_packet_set_keys(SilcPacketStream stream, SilcCipher send_key,
+ SilcCipher receive_key, SilcHmac send_hmac,
+ SilcHmac receive_hmac, SilcBool rekey)
{
- SILC_LOG_DEBUG(("Setting new ciphers to packet stream"));
+ SILC_LOG_DEBUG(("Setting new keys to packet stream %p", stream));
+
+ /* If doing rekey, send REKEY_DONE packet */
+ if (rekey) {
+ /* This will take stream lock. */
+ if (!silc_packet_send_raw(stream, SILC_PACKET_REKEY_DONE, 0,
+ stream->src_id_type, stream->src_id,
+ stream->src_id_len, stream->dst_id_type,
+ stream->dst_id, stream->dst_id_len,
+ NULL, 0, stream->send_key[0],
+ stream->send_hmac[0]))
+ return FALSE;
- silc_mutex_lock(stream->lock);
+ /* Write the packet to the stream */
+ if (!silc_packet_stream_write(stream, TRUE))
+ return FALSE;
+ } else {
+ silc_mutex_lock(stream->lock);
+ }
- /* In case IV Included is set, save the old key */
+ /* In case IV Included is set, save the old keys */
if (stream->iv_included) {
- if (stream->send_key[1]) {
+ if (stream->send_key[1] && send_key) {
silc_cipher_free(stream->send_key[1]);
stream->send_key[1] = stream->send_key[0];
}
- if (stream->receive_key[1]) {
+ if (stream->receive_key[1] && receive_key) {
silc_cipher_free(stream->receive_key[1]);
stream->receive_key[1] = stream->receive_key[0];
}
- } else {
- if (stream->send_key[0])
- silc_cipher_free(stream->send_key[0]);
- if (stream->send_key[1])
- silc_cipher_free(stream->receive_key[0]);
- }
-
- stream->send_key[0] = send;
- stream->receive_key[0] = receive;
-
- silc_mutex_unlock(stream->lock);
-}
-
-/* Return current ciphers from packet stream */
-
-SilcBool silc_packet_get_ciphers(SilcPacketStream stream, SilcCipher *send,
- SilcCipher *receive)
-{
- if (!stream->send_key[0] && !stream->receive_key[0])
- return FALSE;
-
- silc_mutex_lock(stream->lock);
-
- if (send)
- *send = stream->send_key[0];
- if (receive)
- *receive = stream->receive_key[0];
-
- silc_mutex_unlock(stream->lock);
-
- return TRUE;
-}
-
-/* Set HMACs for packet stream */
-
-void silc_packet_set_hmacs(SilcPacketStream stream, SilcHmac send,
- SilcHmac receive)
-{
- SILC_LOG_DEBUG(("Setting new HMACs to packet stream"));
-
- silc_mutex_lock(stream->lock);
-
- /* In case IV Included is set, save the old HMAC */
- if (stream->iv_included) {
- if (stream->send_hmac[1]) {
+ if (stream->send_hmac[1] && send_hmac) {
silc_hmac_free(stream->send_hmac[1]);
stream->send_hmac[1] = stream->send_hmac[0];
}
- if (stream->receive_hmac[1]) {
+ if (stream->receive_hmac[1] && receive_hmac) {
silc_hmac_free(stream->receive_hmac[1]);
stream->receive_hmac[1] = stream->receive_hmac[0];
}
} else {
- if (stream->send_hmac[0])
+ if (stream->send_key[0] && send_key)
+ silc_cipher_free(stream->send_key[0]);
+ if (stream->send_key[1] && receive_key)
+ silc_cipher_free(stream->receive_key[0]);
+ if (stream->send_hmac[0] && send_hmac)
silc_hmac_free(stream->send_hmac[0]);
- if (stream->receive_hmac[0])
+ if (stream->receive_hmac[0] && receive_hmac)
silc_hmac_free(stream->receive_hmac[0]);
}
- stream->send_hmac[0] = send;
- stream->receive_hmac[0] = receive;
+ /* Set keys */
+ if (send_key)
+ stream->send_key[0] = send_key;
+ if (receive_key)
+ stream->receive_key[0] = receive_key;
+ if (send_hmac)
+ stream->send_hmac[0] = send_hmac;
+ if (receive_hmac)
+ stream->receive_hmac[0] = receive_hmac;
silc_mutex_unlock(stream->lock);
+ return TRUE;
}
-/* Return current HMACs from packet stream */
+/* Return current ciphers from packet stream */
-SilcBool silc_packet_get_hmacs(SilcPacketStream stream, SilcHmac *send,
- SilcHmac *receive)
+SilcBool silc_packet_get_keys(SilcPacketStream stream,
+ SilcCipher *send_key,
+ SilcCipher *receive_key,
+ SilcHmac *send_hmac,
+ SilcHmac *receive_hmac)
{
- if (!stream->send_hmac[0] && !stream->receive_hmac[0])
+ if (!stream->send_key[0] && !stream->receive_key[0] &&
+ !stream->send_hmac[0] && !stream->receive_hmac[0])
return FALSE;
silc_mutex_lock(stream->lock);
- if (send)
- *send = stream->send_hmac[0];
- if (receive)
- *receive = stream->receive_hmac[0];
+ if (send_key)
+ *send_key = stream->send_key[0];
+ if (receive_key)
+ *receive_key = stream->receive_key[0];
+ if (send_hmac)
+ *send_hmac = stream->send_hmac[0];
+ if (receive_hmac)
+ *receive_hmac = stream->receive_hmac[0];
silc_mutex_unlock(stream->lock);
/* Prepare outgoing data buffer for packet sending. Returns the
pointer to that buffer into the `packet'. */
-static SilcBool silc_packet_send_prepare(SilcPacketStream stream,
- SilcUInt32 totlen,
- SilcHmac hmac,
- SilcBuffer packet)
+static inline SilcBool silc_packet_send_prepare(SilcPacketStream stream,
+ SilcUInt32 totlen,
+ SilcHmac hmac,
+ SilcBuffer packet)
{
unsigned char *oldptr;
unsigned int mac_len = hmac ? silc_hmac_len(hmac) : 0;
return TRUE;
}
-/* Internal routine to send packet */
-
-static SilcBool silc_packet_send_raw(SilcPacketStream stream,
- SilcPacketType type,
- SilcPacketFlags flags,
- SilcIdType src_id_type,
- unsigned char *src_id,
- SilcUInt32 src_id_len,
- SilcIdType dst_id_type,
- unsigned char *dst_id,
- SilcUInt32 dst_id_len,
- const unsigned char *data,
- SilcUInt32 data_len,
- SilcCipher cipher,
- SilcHmac hmac)
+/* Internal routine to assemble outgoing packet. Assembles and encryptes
+ the packet. The silc_packet_stream_write needs to be called to send it
+ after this returns TRUE. */
+
+static inline SilcBool silc_packet_send_raw(SilcPacketStream stream,
+ SilcPacketType type,
+ SilcPacketFlags flags,
+ SilcIdType src_id_type,
+ unsigned char *src_id,
+ SilcUInt32 src_id_len,
+ SilcIdType dst_id_type,
+ unsigned char *dst_id,
+ SilcUInt32 dst_id_len,
+ const unsigned char *data,
+ SilcUInt32 data_len,
+ SilcCipher cipher,
+ SilcHmac hmac)
{
unsigned char tmppad[SILC_PACKET_MAX_PADLEN], iv[33], psn[4];
int block_len = (cipher ? silc_cipher_get_block_len(cipher) : 0);
stream->send_psn++;
}
- /* Write the packet to the stream */
- return silc_packet_stream_write(stream);
+ return TRUE;
}
/* Sends a packet */
SilcPacketType type, SilcPacketFlags flags,
const unsigned char *data, SilcUInt32 data_len)
{
- return silc_packet_send_raw(stream, type, flags,
- stream->src_id_type,
- stream->src_id,
- stream->src_id_len,
- stream->dst_id_type,
- stream->dst_id,
- stream->dst_id_len,
- data, data_len,
- stream->send_key[0],
- stream->send_hmac[0]);
+ SilcBool ret;
+
+ ret = silc_packet_send_raw(stream, type, flags,
+ stream->src_id_type,
+ stream->src_id,
+ stream->src_id_len,
+ stream->dst_id_type,
+ stream->dst_id,
+ stream->dst_id_len,
+ data, data_len,
+ stream->send_key[0],
+ stream->send_hmac[0]);
+
+ /* Write the packet to the stream */
+ return ret ? silc_packet_stream_write(stream, FALSE) : FALSE;
}
/* Sends a packet, extended routine */
{
unsigned char src_id_data[32], dst_id_data[32];
SilcUInt32 src_id_len, dst_id_len;
+ SilcBool ret;
if (src_id)
if (!silc_id_id2str(src_id, src_id_type, src_id_data,
sizeof(dst_id_data), &dst_id_len))
return FALSE;
- return silc_packet_send_raw(stream, type, flags,
- src_id ? src_id_type : stream->src_id_type,
- src_id ? src_id_data : stream->src_id,
- src_id ? src_id_len : stream->src_id_len,
- dst_id ? dst_id_type : stream->dst_id_type,
- dst_id ? dst_id_data : stream->dst_id,
- dst_id ? dst_id_len : stream->dst_id_len,
- data, data_len,
- cipher ? cipher : stream->send_key[0],
- hmac ? hmac : stream->send_hmac[0]);
+ ret = silc_packet_send_raw(stream, type, flags,
+ src_id ? src_id_type : stream->src_id_type,
+ src_id ? src_id_data : stream->src_id,
+ src_id ? src_id_len : stream->src_id_len,
+ dst_id ? dst_id_type : stream->dst_id_type,
+ dst_id ? dst_id_data : stream->dst_id,
+ dst_id ? dst_id_len : stream->dst_id_len,
+ data, data_len,
+ cipher ? cipher : stream->send_key[0],
+ hmac ? hmac : stream->send_hmac[0]);
+
+ /* Write the packet to the stream */
+ return ret ? silc_packet_stream_write(stream, FALSE) : FALSE;
}
/* Sends packet after formatting the arguments to buffer */
/* Checks MAC in the packet. Returns TRUE if MAC is Ok. */
-static SilcBool silc_packet_check_mac(SilcHmac hmac,
- const unsigned char *data,
- SilcUInt32 data_len,
- const unsigned char *packet_mac,
- const unsigned char *packet_seq,
- SilcUInt32 sequence)
+static inline SilcBool silc_packet_check_mac(SilcHmac hmac,
+ const unsigned char *data,
+ SilcUInt32 data_len,
+ const unsigned char *packet_mac,
+ const unsigned char *packet_seq,
+ SilcUInt32 sequence)
{
/* Check MAC */
if (hmac) {
/* Decrypts SILC packet. Handles both normal and special packet decryption.
Return 0 when packet is normal and 1 when it it special, -1 on error. */
-static int silc_packet_decrypt(SilcCipher cipher, SilcHmac hmac,
- SilcUInt32 sequence, SilcBuffer buffer,
- SilcBool normal)
+static inline int silc_packet_decrypt(SilcCipher cipher, SilcHmac hmac,
+ SilcUInt32 sequence, SilcBuffer buffer,
+ SilcBool normal)
{
if (normal == TRUE) {
if (cipher) {
parsed. The buffer sent must be already decrypted before calling this
function. */
-static SilcBool silc_packet_parse(SilcPacket packet)
+static inline SilcBool silc_packet_parse(SilcPacket packet)
{
SilcBuffer buffer = &packet->buffer;
SilcUInt8 padlen = (SilcUInt8)buffer->data[4];
SILC_STR_UI_CHAR(&src_id_type),
SILC_STR_END);
if (ret == -1) {
- SILC_LOG_ERROR(("Malformed packet header, packet dropped"));
+ if (!packet->stream->udp &&
+ !silc_socket_stream_is_udp(packet->stream->stream, NULL))
+ SILC_LOG_ERROR(("Malformed packet header, packet dropped"));
return FALSE;
}
if (src_id_len > SILC_PACKET_MAX_ID_LEN ||
dst_id_len > SILC_PACKET_MAX_ID_LEN) {
- SILC_LOG_ERROR(("Bad ID lengths in packet (%d and %d)",
- packet->src_id_len, packet->dst_id_len));
+ if (!packet->stream->udp &&
+ !silc_socket_stream_is_udp(packet->stream->stream, NULL))
+ SILC_LOG_ERROR(("Bad ID lengths in packet (%d and %d)",
+ packet->src_id_len, packet->dst_id_len));
return FALSE;
}
SILC_STR_OFFSET(padlen),
SILC_STR_END);
if (ret == -1) {
- SILC_LOG_ERROR(("Malformed packet header, packet dropped"));
+ if (!packet->stream->udp &&
+ !silc_socket_stream_is_udp(packet->stream->stream, NULL))
+ SILC_LOG_ERROR(("Malformed packet header, packet dropped"));
return FALSE;
}
if (src_id_type > SILC_ID_CHANNEL ||
dst_id_type > SILC_ID_CHANNEL) {
- SILC_LOG_ERROR(("Bad ID types in packet (%d and %d)",
- src_id_type, dst_id_type));
+ if (!packet->stream->udp &&
+ !silc_socket_stream_is_udp(packet->stream->stream, NULL))
+ SILC_LOG_ERROR(("Bad ID types in packet (%d and %d)",
+ src_id_type, dst_id_type));
return FALSE;
}
SilcBool default_sent = FALSE;
SilcPacketType *pt;
- /* Parse the packet */
- if (!silc_packet_parse(packet)) {
- silc_mutex_unlock(stream->lock);
- SILC_PACKET_CALLBACK_ERROR(stream, SILC_PACKET_ERR_MALFORMED);
- silc_mutex_lock(stream->lock);
- silc_packet_free(packet);
- return;
- }
-
/* Dispatch packet to all packet processors that want it */
if (!stream->process) {
/* Sanity checks */
if (packetlen < SILC_PACKET_MIN_LEN) {
- SILC_LOG_ERROR(("Received too short packet"));
+ if (!stream->udp && !silc_socket_stream_is_udp(stream->stream, NULL))
+ SILC_LOG_ERROR(("Received too short packet"));
silc_mutex_unlock(stream->lock);
SILC_PACKET_CALLBACK_ERROR(stream, SILC_PACKET_ERR_MALFORMED);
silc_mutex_lock(stream->lock);
/* Pull the packet from inbuf thus we'll get the next one in the inbuf. */
silc_buffer_pull(&stream->inbuf, paddedlen + mac_len);
+ /* Parse the packet */
+ if (!silc_packet_parse(packet)) {
+ silc_mutex_unlock(stream->lock);
+ SILC_PACKET_CALLBACK_ERROR(stream, SILC_PACKET_ERR_MALFORMED);
+ silc_mutex_lock(stream->lock);
+ silc_packet_free(packet);
+ memset(tmp, 0, sizeof(tmp));
+ return;
+ }
+
/* Dispatch the packet to application */
silc_packet_dispatch(packet);
}
projects / silc.git / blobdiff