--- a/src/protocols/sametime/meanwhile/channel.c Fri Jan 20 00:19:53 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,961 +0,0 @@
-
-/*
- Meanwhile - Unofficial Lotus Sametime Community Client Library
- Copyright (C) 2004 Christopher (siege) O'Brien
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#include <glib.h>
-#include <glib/ghash.h>
-#include <glib/glist.h>
-#include <string.h>
-
-#include "mw_channel.h"
-#include "mw_cipher.h"
-#include "mw_debug.h"
-#include "mw_error.h"
-#include "mw_message.h"
-#include "mw_service.h"
-#include "mw_session.h"
-#include "mw_util.h"
-
-
-/** @todo reorganize this file, stuff is just strewn about */
-
-
-struct mwChannel {
-
- /** session this channel belongs to */
- struct mwSession *session;
-
- enum mwChannelState state;
-
- /** creator for incoming channel, target for outgoing channel */
- struct mwLoginInfo user;
-
- /* similar to data from the CreateCnl message in 8.4.1.7 */
- guint32 reserved; /**< special, unknown meaning */
- guint32 id; /**< channel ID */
- guint32 service; /**< service ID */
- guint32 proto_type; /**< service protocol type */
- guint32 proto_ver; /**< service protocol version */
- guint32 options; /**< channel options */
-
- struct mwOpaque addtl_create;
- struct mwOpaque addtl_accept;
-
- /** all those supported ciphers */
- GHashTable *supported;
- guint16 offered_policy; /**< @see enum mwEncryptPolicy */
- guint16 policy; /**< @see enum mwEncryptPolicy */
-
- /** cipher information determined at channel acceptance */
- struct mwCipherInstance *cipher;
-
- /** statistics table */
- GHashTable *stats;
-
- GSList *outgoing_queue; /**< queued outgoing messages */
- GSList *incoming_queue; /**< queued incoming messages */
-
- struct mw_datum srvc_data; /**< service-specific data */
-};
-
-
-struct mwChannelSet {
- struct mwSession *session; /**< owning session */
- GHashTable *map; /**< map of all channels, by ID */
- guint32 counter; /**< counter for outgoing ID */
-};
-
-
-static void flush_channel(struct mwChannel *);
-
-
-static const char *state_str(enum mwChannelState state) {
- switch(state) {
- case mwChannel_NEW: return "new";
- case mwChannel_INIT: return "initializing";
- case mwChannel_WAIT: return "waiting";
- case mwChannel_OPEN: return "open";
- case mwChannel_DESTROY: return "closing";
- case mwChannel_ERROR: return "error";
-
- case mwChannel_UNKNOWN: /* fall through */
- default: return "UNKNOWN";
- }
-}
-
-
-static void state(struct mwChannel *chan, enum mwChannelState state,
- guint32 err_code) {
-
- g_return_if_fail(chan != NULL);
-
- if(chan->state == state) return;
-
- chan->state = state;
-
- if(err_code) {
- g_message("channel 0x%08x state: %s (0x%08x)",
- chan->id, state_str(state), err_code);
- } else {
- g_message("channel 0x%08x state: %s", chan->id, state_str(state));
- }
-}
-
-
-static gpointer get_stat(struct mwChannel *chan,
- enum mwChannelStatField field) {
-
- return g_hash_table_lookup(chan->stats, (gpointer) field);
-}
-
-
-static void set_stat(struct mwChannel *chan, enum mwChannelStatField field,
- gpointer val) {
-
- g_hash_table_insert(chan->stats, (gpointer) field, val);
-}
-
-
-#define incr_stat(chan, field, incr) \
- set_stat(chan, field, get_stat(chan, field) + incr)
-
-
-#define timestamp_stat(chan, field) \
- set_stat(chan, field, (gpointer) time(NULL))
-
-
-static void sup_free(gpointer a) {
- mwCipherInstance_free(a);
-}
-
-
-struct mwCipherInstance *get_supported(struct mwChannel *chan, guint16 id) {
- guint32 cid = (guint32) id;
- return g_hash_table_lookup(chan->supported, GUINT_TO_POINTER(cid));
-}
-
-
-void put_supported(struct mwChannel *chan, struct mwCipherInstance *ci) {
- struct mwCipher *cipher = mwCipherInstance_getCipher(ci);
- guint32 cid = (guint32) mwCipher_getType(cipher);
- g_hash_table_insert(chan->supported, GUINT_TO_POINTER(cid), ci);
-}
-
-
-struct mwChannel *mwChannel_newIncoming(struct mwChannelSet *cs, guint32 id) {
- struct mwChannel *chan;
-
- g_return_val_if_fail(cs != NULL, NULL);
- g_return_val_if_fail(cs->session != NULL, NULL);
-
- chan = g_new0(struct mwChannel, 1);
- chan->state = mwChannel_NEW;
- chan->session = cs->session;
- chan->id = id;
-
- chan->stats = g_hash_table_new(g_direct_hash, g_direct_equal);
-
- chan->supported = g_hash_table_new_full(g_direct_hash, g_direct_equal,
- NULL, sup_free);
-
- g_hash_table_insert(cs->map, GUINT_TO_POINTER(id), chan);
-
- state(chan, mwChannel_WAIT, 0);
-
- return chan;
-}
-
-
-struct mwChannel *mwChannel_newOutgoing(struct mwChannelSet *cs) {
- guint32 id;
- struct mwChannel *chan;
-
- g_return_val_if_fail(cs != NULL, NULL);
- g_return_val_if_fail(cs->map != NULL, NULL);
-
- /* grab the next id, and try to make sure there isn't already a
- channel using it */
- do {
- id = ++cs->counter;
- } while(g_hash_table_lookup(cs->map, GUINT_TO_POINTER(id)));
-
- chan = mwChannel_newIncoming(cs, id);
- state(chan, mwChannel_INIT, 0);
-
- return chan;
-}
-
-
-guint32 mwChannel_getId(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, 0);
- return chan->id;
-}
-
-
-struct mwSession *mwChannel_getSession(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, NULL);
- return chan->session;
-}
-
-
-guint32 mwChannel_getServiceId(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, 0);
- return chan->service;
-}
-
-
-struct mwService *mwChannel_getService(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, NULL);
- return mwSession_getService(chan->session, chan->service);
-}
-
-
-void mwChannel_setService(struct mwChannel *chan, struct mwService *srvc) {
- g_return_if_fail(chan != NULL);
- g_return_if_fail(srvc != NULL);
- g_return_if_fail(chan->state == mwChannel_INIT);
- chan->service = mwService_getType(srvc);
-}
-
-
-gpointer mwChannel_getServiceData(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, NULL);
- return mw_datum_get(&chan->srvc_data);
-}
-
-
-void mwChannel_setServiceData(struct mwChannel *chan,
- gpointer data, GDestroyNotify clean) {
-
- g_return_if_fail(chan != NULL);
- mw_datum_set(&chan->srvc_data, data, clean);
-}
-
-
-void mwChannel_removeServiceData(struct mwChannel *chan) {
- g_return_if_fail(chan != NULL);
- mw_datum_clear(&chan->srvc_data);
-}
-
-
-guint32 mwChannel_getProtoType(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, 0x00);
- return chan->proto_type;
-}
-
-
-void mwChannel_setProtoType(struct mwChannel *chan, guint32 proto_type) {
- g_return_if_fail(chan != NULL);
- g_return_if_fail(chan->state == mwChannel_INIT);
- chan->proto_type = proto_type;
-}
-
-
-guint32 mwChannel_getProtoVer(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, 0x00);
- return chan->proto_ver;
-}
-
-
-void mwChannel_setProtoVer(struct mwChannel *chan, guint32 proto_ver) {
- g_return_if_fail(chan != NULL);
- g_return_if_fail(chan->state == mwChannel_INIT);
- chan->proto_ver = proto_ver;
-}
-
-
-guint16 mwChannel_getEncryptPolicy(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, 0x00);
- return chan->policy;
-}
-
-
-guint32 mwChannel_getOptions(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, 0x00);
- return chan->options;
-}
-
-
-void mwChannel_setOptions(struct mwChannel *chan, guint32 options) {
- g_return_if_fail(chan != NULL);
- g_return_if_fail(chan->state == mwChannel_INIT);
- chan->options = options;
-}
-
-
-struct mwLoginInfo *mwChannel_getUser(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, NULL);
- return &chan->user;
-}
-
-
-struct mwOpaque *mwChannel_getAddtlCreate(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, NULL);
- return &chan->addtl_create;
-}
-
-
-struct mwOpaque *mwChannel_getAddtlAccept(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, NULL);
- return &chan->addtl_accept;
-}
-
-
-struct mwCipherInstance *mwChannel_getCipherInstance(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, NULL);
- return chan->cipher;
-}
-
-
-enum mwChannelState mwChannel_getState(struct mwChannel *chan) {
- g_return_val_if_fail(chan != NULL, mwChannel_UNKNOWN);
- return chan->state;
-}
-
-
-gpointer mwChannel_getStatistic(struct mwChannel *chan,
- enum mwChannelStatField stat) {
-
- g_return_val_if_fail(chan != NULL, 0);
- g_return_val_if_fail(chan->stats != NULL, 0);
-
- return get_stat(chan, stat);
-}
-
-
-/* send a channel create message */
-int mwChannel_create(struct mwChannel *chan) {
- struct mwMsgChannelCreate *msg;
- GList *list, *l;
- int ret;
-
- g_return_val_if_fail(chan != NULL, -1);
- g_return_val_if_fail(chan->state == mwChannel_INIT, -1);
- g_return_val_if_fail(mwChannel_isOutgoing(chan), -1);
-
- msg = (struct mwMsgChannelCreate *)
- mwMessage_new(mwMessage_CHANNEL_CREATE);
-
- msg->channel = chan->id;
- msg->target.user = g_strdup(chan->user.user_id);
- msg->target.community = g_strdup(chan->user.community);
- msg->service = chan->service;
- msg->proto_type = chan->proto_type;
- msg->proto_ver = chan->proto_ver;
- msg->options = chan->options;
- mwOpaque_clone(&msg->addtl, &chan->addtl_create);
-
- list = mwChannel_getSupportedCipherInstances(chan);
- if(list) {
- /* offer what we have */
- for(l = list; l; l = l->next) {
- struct mwEncryptItem *ei = mwCipherInstance_offer(l->data);
- msg->encrypt.items = g_list_append(msg->encrypt.items, ei);
- }
-
- /* we're easy to get along with */
- chan->offered_policy = mwEncrypt_WHATEVER;
- g_list_free(list);
-
- } else {
- /* we apparently don't support anything */
- chan->offered_policy = mwEncrypt_NONE;
- }
-
- msg->encrypt.mode = chan->offered_policy;
- msg->encrypt.extra = chan->offered_policy;
-
- ret = mwSession_send(chan->session, MW_MESSAGE(msg));
- mwMessage_free(MW_MESSAGE(msg));
-
- state(chan, (ret)? mwChannel_ERROR: mwChannel_WAIT, ret);
-
- return ret;
-}
-
-
-static void channel_open(struct mwChannel *chan) {
- state(chan, mwChannel_OPEN, 0);
- timestamp_stat(chan, mwChannelStat_OPENED_AT);
- flush_channel(chan);
-}
-
-
-int mwChannel_accept(struct mwChannel *chan) {
- struct mwSession *session;
- struct mwMsgChannelAccept *msg;
- struct mwCipherInstance *ci;
-
- int ret;
-
- g_return_val_if_fail(chan != NULL, -1);
- g_return_val_if_fail(mwChannel_isIncoming(chan), -1);
- g_return_val_if_fail(chan->state == mwChannel_WAIT, -1);
-
- session = chan->session;
- g_return_val_if_fail(session != NULL, -1);
-
- msg = (struct mwMsgChannelAccept *)
- mwMessage_new(mwMessage_CHANNEL_ACCEPT);
-
- msg->head.channel = chan->id;
- msg->service = chan->service;
- msg->proto_type = chan->proto_type;
- msg->proto_ver = chan->proto_ver;
- mwOpaque_clone(&msg->addtl, &chan->addtl_accept);
-
- ci = chan->cipher;
-
- if(! ci) {
- /* automatically select a cipher if one hasn't been already */
-
- switch(chan->offered_policy) {
- case mwEncrypt_NONE:
- mwChannel_selectCipherInstance(chan, NULL);
- break;
-
- case mwEncrypt_RC2_40:
- ci = get_supported(chan, mwCipher_RC2_40);
- mwChannel_selectCipherInstance(chan, ci);
- break;
-
- case mwEncrypt_RC2_128:
- ci = get_supported(chan, mwCipher_RC2_128);
- mwChannel_selectCipherInstance(chan, ci);
- break;
-
- case mwEncrypt_WHATEVER:
- case mwEncrypt_ALL:
- default:
- {
- GList *l, *ll;
-
- l = mwChannel_getSupportedCipherInstances(chan);
- if(l) {
- /* nobody selected a cipher, so we'll just pick the last in
- the list of available ones */
- for(ll = l; ll->next; ll = ll->next);
- ci = ll->data;
- g_list_free(l);
-
- mwChannel_selectCipherInstance(chan, ci);
-
- } else {
- /* this may cause breakage, but there's really nothing else
- we can do. They want something we can't provide. If they
- don't like it, then they'll error the channel out */
- mwChannel_selectCipherInstance(chan, NULL);
- }
- }
- }
- }
-
- msg->encrypt.mode = chan->policy; /* set in selectCipherInstance */
- msg->encrypt.extra = chan->offered_policy;
-
- if(chan->cipher) {
- msg->encrypt.item = mwCipherInstance_accept(chan->cipher);
- }
-
- ret = mwSession_send(session, MW_MESSAGE(msg));
- mwMessage_free(MW_MESSAGE(msg));
-
- if(ret) {
- state(chan, mwChannel_ERROR, ret);
- } else {
- channel_open(chan);
- }
-
- return ret;
-}
-
-
-static void channel_free(struct mwChannel *chan) {
- struct mwSession *s;
- struct mwMessage *msg;
- GSList *l;
-
- /* maybe no warning in the future */
- g_return_if_fail(chan != NULL);
-
- s = chan->session;
-
- mwLoginInfo_clear(&chan->user);
- mwOpaque_clear(&chan->addtl_create);
- mwOpaque_clear(&chan->addtl_accept);
-
- if(chan->supported) {
- g_hash_table_destroy(chan->supported);
- chan->supported = NULL;
- }
-
- if(chan->stats) {
- g_hash_table_destroy(chan->stats);
- chan->stats = NULL;
- }
-
- mwCipherInstance_free(chan->cipher);
-
- /* clean up the outgoing queue */
- for(l = chan->outgoing_queue; l; l = l->next) {
- msg = (struct mwMessage *) l->data;
- l->data = NULL;
- mwMessage_free(msg);
- }
- g_slist_free(chan->outgoing_queue);
-
- /* clean up the incoming queue */
- for(l = chan->incoming_queue; l; l = l->next) {
- msg = (struct mwMessage *) l->data;
- l->data = NULL;
- mwMessage_free(msg);
- }
- g_slist_free(chan->incoming_queue);
-
- g_free(chan);
-}
-
-
-int mwChannel_destroy(struct mwChannel *chan,
- guint32 reason, struct mwOpaque *info) {
-
- struct mwMsgChannelDestroy *msg;
- struct mwSession *session;
- struct mwChannelSet *cs;
- int ret;
-
- /* may make this not a warning in the future */
- g_return_val_if_fail(chan != NULL, 0);
-
- state(chan, reason? mwChannel_ERROR: mwChannel_DESTROY, reason);
-
- session = chan->session;
- g_return_val_if_fail(session != NULL, -1);
-
- cs = mwSession_getChannels(session);
- g_return_val_if_fail(cs != NULL, -1);
-
- /* compose the message */
- msg = (struct mwMsgChannelDestroy *)
- mwMessage_new(mwMessage_CHANNEL_DESTROY);
- msg->head.channel = chan->id;
- msg->reason = reason;
- if(info) mwOpaque_clone(&msg->data, info);
-
- /* remove the channel from the channel set */
- g_hash_table_remove(cs->map, GUINT_TO_POINTER(chan->id));
-
- /* send the message */
- ret = mwSession_send(session, (struct mwMessage *) msg);
- mwMessage_free(MW_MESSAGE(msg));
-
- return ret;
-}
-
-
-static void queue_outgoing(struct mwChannel *chan,
- struct mwMsgChannelSend *msg) {
-
- g_info("queue_outgoing, channel 0x%08x", chan->id);
- chan->outgoing_queue = g_slist_append(chan->outgoing_queue, msg);
-}
-
-
-static int channel_send(struct mwChannel *chan,
- struct mwMsgChannelSend *msg) {
-
- int ret = 0;
-
- /* if the channel is open, send and free the message. Otherwise,
- queue the message to be sent once the channel is finally
- opened */
-
- if(chan->state == mwChannel_OPEN) {
- ret = mwSession_send(chan->session, (struct mwMessage *) msg);
- mwMessage_free(MW_MESSAGE(msg));
-
- } else {
- queue_outgoing(chan, msg);
- }
-
- return ret;
-}
-
-
-int mwChannel_sendEncrypted(struct mwChannel *chan,
- guint32 type, struct mwOpaque *data,
- gboolean encrypt) {
-
- struct mwMsgChannelSend *msg;
-
- g_return_val_if_fail(chan != NULL, -1);
-
- msg = (struct mwMsgChannelSend *) mwMessage_new(mwMessage_CHANNEL_SEND);
- msg->head.channel = chan->id;
- msg->type = type;
-
- mwOpaque_clone(&msg->data, data);
-
- if(encrypt && chan->cipher) {
- msg->head.options = mwMessageOption_ENCRYPT;
- mwCipherInstance_encrypt(chan->cipher, &msg->data);
- }
-
- return channel_send(chan, msg);
-}
-
-
-int mwChannel_send(struct mwChannel *chan, guint32 type,
- struct mwOpaque *data) {
-
- return mwChannel_sendEncrypted(chan, type, data, TRUE);
-}
-
-
-static void queue_incoming(struct mwChannel *chan,
- struct mwMsgChannelSend *msg) {
-
- /* we clone the message, because session_process will clear it once
- we return */
-
- struct mwMsgChannelSend *m = g_new0(struct mwMsgChannelSend, 1);
- m->head.type = msg->head.type;
- m->head.options = msg->head.options;
- m->head.channel = msg->head.channel;
- mwOpaque_clone(&m->head.attribs, &msg->head.attribs);
-
- m->type = msg->type;
- mwOpaque_clone(&m->data, &msg->data);
-
- g_info("queue_incoming, channel 0x%08x", chan->id);
- chan->incoming_queue = g_slist_append(chan->incoming_queue, m);
-}
-
-
-static void channel_recv(struct mwChannel *chan,
- struct mwMsgChannelSend *msg) {
-
- struct mwService *srvc;
- srvc = mwChannel_getService(chan);
-
- incr_stat(chan, mwChannelStat_MSG_RECV, 1);
-
- if(msg->head.options & mwMessageOption_ENCRYPT) {
- struct mwOpaque data = { 0, 0 };
- mwOpaque_clone(&data, &msg->data);
-
- mwCipherInstance_decrypt(chan->cipher, &data);
- mwService_recv(srvc, chan, msg->type, &data);
- mwOpaque_clear(&data);
-
- } else {
- mwService_recv(srvc, chan, msg->type, &msg->data);
- }
-}
-
-
-static void flush_channel(struct mwChannel *chan) {
- GSList *l;
-
- for(l = chan->incoming_queue; l; l = l->next) {
- struct mwMsgChannelSend *msg = (struct mwMsgChannelSend *) l->data;
- l->data = NULL;
-
- channel_recv(chan, msg);
- mwMessage_free(MW_MESSAGE(msg));
- }
- g_slist_free(chan->incoming_queue);
- chan->incoming_queue = NULL;
-
- for(l = chan->outgoing_queue; l; l = l->next) {
- struct mwMessage *msg = (struct mwMessage *) l->data;
- l->data = NULL;
-
- mwSession_send(chan->session, msg);
- mwMessage_free(msg);
- }
- g_slist_free(chan->outgoing_queue);
- chan->outgoing_queue = NULL;
-}
-
-
-void mwChannel_recv(struct mwChannel *chan, struct mwMsgChannelSend *msg) {
- if(chan->state == mwChannel_OPEN) {
- channel_recv(chan, msg);
-
- } else {
- queue_incoming(chan, msg);
- }
-}
-
-
-struct mwChannel *mwChannel_find(struct mwChannelSet *cs, guint32 chan) {
- g_return_val_if_fail(cs != NULL, NULL);
- g_return_val_if_fail(cs->map != NULL, NULL);
- return g_hash_table_lookup(cs->map, GUINT_TO_POINTER(chan));
-}
-
-
-void mwChannelSet_free(struct mwChannelSet *cs) {
- if(! cs) return;
- if(cs->map) g_hash_table_destroy(cs->map);
- g_free(cs);
-}
-
-
-struct mwChannelSet *mwChannelSet_new(struct mwSession *s) {
- struct mwChannelSet *cs = g_new0(struct mwChannelSet, 1);
- cs->session = s;
-
- /* for some reason, g_int_hash/g_int_equal cause a SIGSEGV */
- cs->map = g_hash_table_new_full(g_direct_hash, g_direct_equal,
- NULL, (GDestroyNotify) channel_free);
- return cs;
-}
-
-
-void mwChannel_recvCreate(struct mwChannel *chan,
- struct mwMsgChannelCreate *msg) {
-
- struct mwSession *session;
- GList *list;
- struct mwService *srvc;
-
- g_return_if_fail(chan != NULL);
- g_return_if_fail(msg != NULL);
- g_return_if_fail(chan->id == msg->channel);
-
- session = chan->session;
- g_return_if_fail(session != NULL);
-
- if(mwChannel_isOutgoing(chan)) {
- g_warning("channel 0x%08x not an incoming channel", chan->id);
- mwChannel_destroy(chan, ERR_REQUEST_INVALID, NULL);
- return;
- }
-
- chan->offered_policy = msg->encrypt.mode;
- g_message("channel offered with encrypt policy 0x%04x", chan->policy);
-
- for(list = msg->encrypt.items; list; list = list->next) {
- struct mwEncryptItem *ei = list->data;
- struct mwCipher *cipher;
- struct mwCipherInstance *ci;
-
- g_message("channel offered cipher id 0x%04x", ei->id);
- cipher = mwSession_getCipher(session, ei->id);
- if(! cipher) {
- g_message("no such cipher found in session");
- continue;
- }
-
- ci = mwCipher_newInstance(cipher, chan);
- mwCipherInstance_offered(ci, ei);
- mwChannel_addSupportedCipherInstance(chan, ci);
- }
-
- mwLoginInfo_clone(&chan->user, &msg->creator);
- chan->service = msg->service;
- chan->proto_type = msg->proto_type;
- chan->proto_ver = msg->proto_ver;
-
- srvc = mwSession_getService(session, msg->service);
- if(srvc) {
- mwService_recvCreate(srvc, chan, msg);
-
- } else {
- mwChannel_destroy(chan, ERR_SERVICE_NO_SUPPORT, NULL);
- }
-}
-
-
-void mwChannel_recvAccept(struct mwChannel *chan,
- struct mwMsgChannelAccept *msg) {
-
- struct mwService *srvc;
-
- g_return_if_fail(chan != NULL);
- g_return_if_fail(msg != NULL);
- g_return_if_fail(chan->id == msg->head.channel);
-
- if(mwChannel_isIncoming(chan)) {
- g_warning("channel 0x%08x not an outgoing channel", chan->id);
- mwChannel_destroy(chan, ERR_REQUEST_INVALID, NULL);
- return;
- }
-
- if(chan->state != mwChannel_WAIT) {
- g_warning("channel 0x%08x state not WAIT: %s",
- chan->id, state_str(chan->state));
- mwChannel_destroy(chan, ERR_REQUEST_INVALID, NULL);
- return;
- }
-
- mwLoginInfo_clone(&chan->user, &msg->acceptor);
-
- srvc = mwSession_getService(chan->session, chan->service);
- if(! srvc) {
- g_warning("no service: 0x%08x", chan->service);
- mwChannel_destroy(chan, ERR_SERVICE_NO_SUPPORT, NULL);
- return;
- }
-
- chan->policy = msg->encrypt.mode;
- g_message("channel accepted with encrypt policy 0x%04x", chan->policy);
-
- if(! msg->encrypt.mode || ! msg->encrypt.item) {
- /* no mode or no item means no encryption */
- mwChannel_selectCipherInstance(chan, NULL);
-
- } else {
- guint16 cid = msg->encrypt.item->id;
- struct mwCipherInstance *ci = get_supported(chan, cid);
-
- if(! ci) {
- g_warning("not an offered cipher: 0x%04x", cid);
- mwChannel_destroy(chan, ERR_REQUEST_INVALID, NULL);
- return;
- }
-
- mwCipherInstance_accepted(ci, msg->encrypt.item);
- mwChannel_selectCipherInstance(chan, ci);
- }
-
- /* mark it as open for the service */
- state(chan, mwChannel_OPEN, 0);
-
- /* let the service know */
- mwService_recvAccept(srvc, chan, msg);
-
- /* flush it if the service didn't just immediately close it */
- if(mwChannel_isState(chan, mwChannel_OPEN)) {
- channel_open(chan);
- }
-}
-
-
-void mwChannel_recvDestroy(struct mwChannel *chan,
- struct mwMsgChannelDestroy *msg) {
-
- struct mwChannelSet *cs;
- struct mwService *srvc;
-
- g_return_if_fail(chan != NULL);
- g_return_if_fail(msg != NULL);
- g_return_if_fail(chan->id == msg->head.channel);
-
- state(chan, msg->reason? mwChannel_ERROR: mwChannel_DESTROY, msg->reason);
-
- srvc = mwChannel_getService(chan);
- if(srvc) mwService_recvDestroy(srvc, chan, msg);
-
- cs = mwSession_getChannels(chan->session);
- g_return_if_fail(cs != NULL);
- g_return_if_fail(cs->map != NULL);
-
- g_hash_table_remove(cs->map, GUINT_TO_POINTER(chan->id));
-}
-
-
-void mwChannel_populateSupportedCipherInstances(struct mwChannel *chan) {
- struct mwSession *session;
- GList *list;
-
- g_return_if_fail(chan != NULL);
-
- session = chan->session;
- g_return_if_fail(session != NULL);
-
- for(list = mwSession_getCiphers(session); list; list = list->next) {
- struct mwCipherInstance *ci = mwCipher_newInstance(list->data, chan);
- if(! ci) continue;
- put_supported(chan, ci);
- }
-}
-
-
-void mwChannel_addSupportedCipherInstance(struct mwChannel *chan,
- struct mwCipherInstance *ci) {
- g_return_if_fail(chan != NULL);
- g_message("channel 0x%08x added cipher %s", chan->id,
- NSTR(mwCipher_getName(mwCipherInstance_getCipher(ci))));
- put_supported(chan, ci);
-}
-
-
-static void collect(gpointer a, gpointer b, gpointer c) {
- GList **list = c;
- *list = g_list_append(*list, b);
-}
-
-
-GList *mwChannel_getSupportedCipherInstances(struct mwChannel *chan) {
- GList *list = NULL;
-
- g_return_val_if_fail(chan != NULL, NULL);
- g_hash_table_foreach(chan->supported, collect, &list);
-
- return list;
-}
-
-
-void mwChannel_selectCipherInstance(struct mwChannel *chan,
- struct mwCipherInstance *ci) {
- struct mwCipher *c;
-
- g_return_if_fail(chan != NULL);
- g_return_if_fail(chan->supported != NULL);
-
- chan->cipher = ci;
- if(ci) {
- guint cid;
-
- c = mwCipherInstance_getCipher(ci);
- cid = mwCipher_getType(c);
-
- g_hash_table_steal(chan->supported, GUINT_TO_POINTER(cid));
-
- switch(mwCipher_getType(c)) {
- case mwCipher_RC2_40:
- chan->policy = mwEncrypt_RC2_40;
- break;
-
- case mwCipher_RC2_128:
- chan->policy = mwEncrypt_RC2_128;
- break;
-
- default:
- /* unsure if this is bad */
- chan->policy = mwEncrypt_WHATEVER;
- }
-
- g_message("channel 0x%08x selected cipher %s",
- chan->id, NSTR(mwCipher_getName(c)));
-
- } else {
-
- chan->policy = mwEncrypt_NONE;
- g_message("channel 0x%08x selected no cipher", chan->id);
- }
-
- g_hash_table_destroy(chan->supported);
- chan->supported = NULL;
-}
-
-