X-Git-Url: http://git.silcnet.org/gitweb/?p=silc.git;a=blobdiff_plain;f=lib%2Fsilccore%2Fsilcpacket.c;h=26f721f56f0d34448725a4c7a1e43673702e1429;hp=6dbb69bb44ca4d92751cdd58b439a69962a82d50;hb=805fddcf6431e784f9f77114782a90c9d12f9cbe;hpb=52e57c880aba9c5e89f59d962eb9af75670b76e0 diff --git a/lib/silccore/silcpacket.c b/lib/silccore/silcpacket.c index 6dbb69bb..26f721f5 100644 --- a/lib/silccore/silcpacket.c +++ b/lib/silccore/silcpacket.c @@ -4,7 +4,7 @@ Author: Pekka Riikonen - Copyright (C) 1997 - 2007 Pekka Riikonen + Copyright (C) 1997 - 2008 Pekka Riikonen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -40,7 +40,7 @@ struct SilcPacketEngineStruct { SilcMutex lock; /* Engine lock */ SilcRng rng; /* RNG for engine */ SilcHashTable contexts; /* Per scheduler contexts */ - SilcPacketCallbacks *callbacks; /* Packet callbacks */ + const SilcPacketCallbacks *callbacks; /* Packet callbacks */ void *callback_context; /* Context for callbacks */ SilcList streams; /* All streams in engine */ SilcList packet_pool; /* Free list for received packets */ @@ -51,7 +51,7 @@ struct SilcPacketEngineStruct { /* Packet processor context */ typedef struct SilcPacketProcessStruct { SilcPacketType *types; /* Packets to process */ - SilcPacketCallbacks *callbacks; /* Callbacks or NULL */ + const SilcPacketCallbacks *callbacks; /* Callbacks or NULL */ void *callback_context; SilcInt32 priority; /* Priority */ } *SilcPacketProcess; @@ -81,7 +81,7 @@ struct SilcPacketStreamStruct { unsigned char *dst_id; /* Destination ID */ SilcUInt32 send_psn; /* Sending sequence */ SilcUInt32 receive_psn; /* Receiving sequence */ - SilcAtomic8 refcnt; /* Reference counter */ + SilcAtomic32 refcnt; /* Reference counter */ SilcUInt8 sid; /* Security ID, set if IV included */ unsigned int src_id_len : 6; unsigned int src_id_type : 2; @@ -336,7 +336,6 @@ static inline SilcBool silc_packet_stream_read(SilcPacketStream ps, silc_mutex_unlock(ps->lock); if (ret == -1) { /* Cannot read now, do it later. */ - silc_buffer_pull(inbuf, silc_buffer_len(inbuf)); return FALSE; } @@ -394,7 +393,6 @@ static inline SilcBool silc_packet_stream_read(SilcPacketStream ps, if (ret == -1) { /* Cannot read now, do it later. */ - silc_buffer_pull(inbuf, silc_buffer_len(inbuf)); return FALSE; } @@ -542,7 +540,7 @@ static void silc_packet_engine_context_destr(void *key, void *context, SilcPacketEngine silc_packet_engine_start(SilcRng rng, SilcBool router, - SilcPacketCallbacks *callbacks, + const SilcPacketCallbacks *callbacks, void *callback_context) { SilcPacketEngine engine; @@ -561,7 +559,8 @@ silc_packet_engine_start(SilcRng rng, SilcBool router, if (!engine) return NULL; - engine->contexts = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL, + engine->contexts = silc_hash_table_alloc(NULL, 0, silc_hash_ptr, + NULL, NULL, NULL, silc_packet_engine_context_destr, engine, TRUE); if (!engine->contexts) { @@ -623,7 +622,7 @@ void silc_packet_engine_stop(SilcPacketEngine engine) silc_free(engine); } -static const char *packet_error[] = { +static const char * const packet_error[] = { "Cannot read from stream", "Cannot write to stream", "Packet MAC failed", @@ -697,7 +696,7 @@ SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine, return NULL; ps->stream = stream; - silc_atomic_init8(&ps->refcnt, 1); + silc_atomic_init32(&ps->refcnt, 1); silc_mutex_alloc(&ps->lock); /* Allocate out buffer */ @@ -723,8 +722,8 @@ SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine, (void *)&ps->sc)) { ps->sc = silc_calloc(1, sizeof(*ps->sc)); if (!ps->sc) { - silc_packet_stream_destroy(ps); silc_mutex_unlock(engine->lock); + silc_packet_stream_destroy(ps); return NULL; } ps->sc->engine = engine; @@ -735,8 +734,8 @@ SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine, if (!inbuf) { silc_free(ps->sc); ps->sc = NULL; - silc_packet_stream_destroy(ps); silc_mutex_unlock(engine->lock); + silc_packet_stream_destroy(ps); return NULL; } silc_buffer_reset(inbuf); @@ -746,8 +745,8 @@ SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine, silc_buffer_free(inbuf); silc_free(ps->sc); ps->sc = NULL; - silc_packet_stream_destroy(ps); silc_mutex_unlock(engine->lock); + silc_packet_stream_destroy(ps); return NULL; } silc_dlist_add(ps->sc->inbufs, inbuf); @@ -758,8 +757,8 @@ SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine, silc_dlist_del(ps->sc->inbufs, inbuf); silc_free(ps->sc); ps->sc = NULL; - silc_packet_stream_destroy(ps); silc_mutex_unlock(engine->lock); + silc_packet_stream_destroy(ps); return NULL; } } @@ -770,10 +769,10 @@ SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine, /* If this is UDP stream, allocate UDP remote stream hash table */ if (!engine->udp_remote && silc_socket_stream_is_udp(stream, NULL)) - engine->udp_remote = silc_hash_table_alloc(0, silc_hash_string, NULL, - silc_hash_string_compare, NULL, - silc_packet_engine_hash_destr, - NULL, TRUE); + engine->udp_remote = + silc_hash_table_alloc(NULL, 0, silc_hash_string_case, NULL, + silc_hash_string_case_compare, NULL, + silc_packet_engine_hash_destr, NULL, TRUE); silc_mutex_unlock(engine->lock); @@ -785,6 +784,8 @@ SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine, return NULL; } + SILC_LOG_DEBUG(("Created packet stream %p", ps)); + return ps; } @@ -816,7 +817,7 @@ SilcPacketStream silc_packet_stream_add_remote(SilcPacketStream stream, return NULL; ps->sc = stream->sc; - silc_atomic_init8(&ps->refcnt, 1); + silc_atomic_init32(&ps->refcnt, 1); silc_mutex_alloc(&ps->lock); /* Set the UDP packet stream as underlaying stream */ @@ -884,9 +885,13 @@ void silc_packet_stream_destroy(SilcPacketStream stream) if (!stream) return; - if (silc_atomic_sub_int8(&stream->refcnt, 1) > 0) { + if (silc_atomic_sub_int32(&stream->refcnt, 1) > 0) { + if (stream->destroyed) + return; stream->destroyed = TRUE; + SILC_LOG_DEBUG(("Marking packet stream %p destroyed", stream)); + /* Close the underlaying stream */ if (!stream->udp && stream->stream) silc_stream_close(stream->stream); @@ -897,17 +902,18 @@ void silc_packet_stream_destroy(SilcPacketStream stream) if (!stream->udp) { /* Delete from engine */ - engine = stream->sc->engine; - silc_mutex_lock(engine->lock); - silc_list_del(engine->streams, stream); - - /* Remove per scheduler context, if it is not used anymore */ if (stream->sc) { + engine = stream->sc->engine; + silc_mutex_lock(engine->lock); + silc_list_del(engine->streams, stream); + + /* Remove per scheduler context, if it is not used anymore */ stream->sc->stream_count--; if (!stream->sc->stream_count) silc_hash_table_del(engine->contexts, stream->sc->schedule); + + silc_mutex_unlock(engine->lock); } - silc_mutex_unlock(engine->lock); /* Destroy the underlaying stream */ if (stream->stream) @@ -967,7 +973,7 @@ void silc_packet_stream_destroy(SilcPacketStream stream) silc_free(stream->src_id); silc_free(stream->dst_id); - silc_atomic_uninit8(&stream->refcnt); + silc_atomic_uninit32(&stream->refcnt); silc_mutex_free(stream->lock); silc_free(stream); } @@ -996,7 +1002,7 @@ void silc_packet_stream_set_iv_included(SilcPacketStream stream) /* Links `callbacks' to `stream' for specified packet types */ static SilcBool silc_packet_stream_link_va(SilcPacketStream stream, - SilcPacketCallbacks *callbacks, + const SilcPacketCallbacks *callbacks, void *callback_context, int priority, va_list ap) { @@ -1025,6 +1031,7 @@ static SilcBool silc_packet_stream_link_va(SilcPacketStream stream, stream->process = silc_dlist_init(); if (!stream->process) { silc_mutex_unlock(stream->lock); + silc_free(p); return FALSE; } } @@ -1074,7 +1081,7 @@ static SilcBool silc_packet_stream_link_va(SilcPacketStream stream, /* Links `callbacks' to `stream' for specified packet types */ SilcBool silc_packet_stream_link(SilcPacketStream stream, - SilcPacketCallbacks *callbacks, + const SilcPacketCallbacks *callbacks, void *callback_context, int priority, ...) { @@ -1092,7 +1099,7 @@ SilcBool silc_packet_stream_link(SilcPacketStream stream, /* Unlinks `callbacks' from `stream'. */ void silc_packet_stream_unlink(SilcPacketStream stream, - SilcPacketCallbacks *callbacks, + const SilcPacketCallbacks *callbacks, void *callback_context) { SilcPacketProcess p; @@ -1148,10 +1155,10 @@ SilcBool silc_packet_get_sender(SilcPacket packet, void silc_packet_stream_ref(SilcPacketStream stream) { - silc_atomic_add_int8(&stream->refcnt, 1); + silc_atomic_add_int32(&stream->refcnt, 1); SILC_LOG_DEBUG(("Stream %p, refcnt %d->%d", stream, - silc_atomic_get_int8(&stream->refcnt) - 1, - silc_atomic_get_int8(&stream->refcnt))); + silc_atomic_get_int32(&stream->refcnt) - 1, + silc_atomic_get_int32(&stream->refcnt))); } /* Unreference packet stream */ @@ -1159,11 +1166,11 @@ void silc_packet_stream_ref(SilcPacketStream stream) void silc_packet_stream_unref(SilcPacketStream stream) { SILC_LOG_DEBUG(("Stream %p, refcnt %d->%d", stream, - silc_atomic_get_int8(&stream->refcnt), - silc_atomic_get_int8(&stream->refcnt) - 1)); - if (silc_atomic_sub_int8(&stream->refcnt, 1) > 0) + silc_atomic_get_int32(&stream->refcnt), + silc_atomic_get_int32(&stream->refcnt) - 1)); + if (silc_atomic_sub_int32(&stream->refcnt, 1) > 0) return; - silc_atomic_add_int8(&stream->refcnt, 1); + silc_atomic_add_int32(&stream->refcnt, 1); silc_packet_stream_destroy(stream); } @@ -1318,6 +1325,7 @@ SilcBool silc_packet_set_ids(SilcPacketStream stream, { SilcUInt32 len; unsigned char tmp[32]; + void *tmp_id; if (!src_id && !dst_id) return FALSE; @@ -1327,16 +1335,17 @@ SilcBool silc_packet_set_ids(SilcPacketStream stream, if (src_id) { SILC_LOG_DEBUG(("Setting source ID to packet stream %p", stream)); - silc_free(stream->src_id); if (!silc_id_id2str(src_id, src_id_type, tmp, sizeof(tmp), &len)) { silc_mutex_unlock(stream->lock); return FALSE; } - stream->src_id = silc_memdup(tmp, len); - if (!stream->src_id) { + tmp_id = silc_memdup(tmp, len); + if (!tmp_id) { silc_mutex_unlock(stream->lock); return FALSE; } + silc_free(stream->src_id); + stream->src_id = tmp_id; stream->src_id_type = src_id_type; stream->src_id_len = len; } @@ -1344,16 +1353,17 @@ SilcBool silc_packet_set_ids(SilcPacketStream stream, if (dst_id) { SILC_LOG_DEBUG(("Setting destination ID to packet stream %p", stream)); - silc_free(stream->dst_id); if (!silc_id_id2str(dst_id, dst_id_type, tmp, sizeof(tmp), &len)) { silc_mutex_unlock(stream->lock); return FALSE; } - stream->dst_id = silc_memdup(tmp, len); - if (!stream->dst_id) { + tmp_id = silc_memdup(tmp, len); + if (!tmp_id) { silc_mutex_unlock(stream->lock); return FALSE; } + silc_free(stream->dst_id); + stream->dst_id = tmp_id; stream->dst_id_type = dst_id_type; stream->dst_id_len = len; } @@ -1467,14 +1477,6 @@ static inline void silc_packet_send_ctr_increment(SilcPacketStream stream, unsigned char *iv = silc_cipher_get_iv(cipher); SilcUInt32 pc1, pc2; - /* Increment 64-bit packet counter */ - SILC_GET32_MSB(pc1, iv + 4); - SILC_GET32_MSB(pc2, iv + 8); - if (++pc2 == 0) - ++pc1; - SILC_PUT32_MSB(pc1, iv + 4); - SILC_PUT32_MSB(pc2, iv + 8); - /* Reset block counter */ memset(iv + 12, 0, 4); @@ -1485,17 +1487,30 @@ static inline void silc_packet_send_ctr_increment(SilcPacketStream stream, ret_iv[1] = ret_iv[0] + iv[4]; ret_iv[2] = ret_iv[0] ^ ret_iv[1]; ret_iv[3] = ret_iv[0] + ret_iv[2]; - SILC_PUT32_MSB(pc2, ret_iv + 4); + + /* Increment 32-bit packet counter */ + SILC_GET32_MSB(pc1, iv + 8); + pc1++; + SILC_PUT32_MSB(pc1, ret_iv + 4); + SILC_LOG_HEXDUMP(("IV"), ret_iv, 8); - /* Set new nonce to counter block */ - memcpy(iv + 4, ret_iv, 4); + /* Set new IV to counter block */ + memcpy(iv + 4, ret_iv, 8); + } else { + /* Increment 64-bit packet counter */ + SILC_GET32_MSB(pc1, iv + 4); + SILC_GET32_MSB(pc2, iv + 8); + if (++pc2 == 0) + ++pc1; + SILC_PUT32_MSB(pc1, iv + 4); + SILC_PUT32_MSB(pc2, iv + 8); } SILC_LOG_HEXDUMP(("Counter Block"), iv, 16); } -/* Internal routine to assemble outgoing packet. Assembles and encryptes +/* Internal routine to assemble outgoing packet. Assembles and encrypts the packet. The silc_packet_stream_write needs to be called to send it after this returns TRUE. */ @@ -1604,6 +1619,12 @@ static inline SilcBool silc_packet_send_raw(SilcPacketStream stream, silc_mutex_lock(stream->lock); + if (silc_unlikely(stream->destroyed)) { + SILC_LOG_DEBUG(("Stream %p is destroyed, cannot send packet", stream)); + silc_mutex_unlock(stream->lock); + return FALSE; + } + /* Get packet pointer from the outgoing buffer */ if (silc_unlikely(!silc_packet_send_prepare(stream, truelen + padlen + ivlen + psnlen, hmac, &packet))) { @@ -2330,7 +2351,7 @@ silc_packet_wait_packet_receive(SilcPacketEngine engine, void *stream_context); /* Packet waiting callbacks */ -static SilcPacketCallbacks silc_packet_wait_cbs = +static const SilcPacketCallbacks silc_packet_wait_cbs = { silc_packet_wait_packet_receive, NULL, NULL }; @@ -2519,7 +2540,7 @@ typedef struct { } *SilcPacketWrapperStream; /* Packet wrapper callbacks */ -static SilcPacketCallbacks silc_packet_wrap_cbs = +static const SilcPacketCallbacks silc_packet_wrap_cbs = { silc_packet_wrap_packet_receive, NULL, NULL };