make server connection a cancellable operation
this entails splitting drv->open_store() into alloc_store() and connect_store().
This commit is contained in:
Oswald Buddenhagen
parent
246c417874
commit
9d22641b62
21
src/driver.h
21
src/driver.h
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@ -121,8 +121,10 @@ typedef struct {
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#define DRV_MSG_BAD 1
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/* Something is wrong with the current mailbox - probably it is somehow inaccessible. */
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#define DRV_BOX_BAD 2
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/* Failed to connect store. */
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#define DRV_STORE_BAD 3
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/* The command has been cancel()ed or cancel_store()d. */
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#define DRV_CANCELED 3
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#define DRV_CANCELED 4
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/* All memory belongs to the driver's user, unless stated otherwise. */
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@ -146,16 +148,19 @@ struct driver {
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/* Parse configuration. */
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int (*parse_store)( conffile_t *cfg, store_conf_t **storep );
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/* Close remaining server connections. All stores must be disowned first. */
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/* Close remaining server connections. All stores must be discarded first. */
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void (*cleanup)( void );
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/* Open a store with the given configuration. This may recycle existing
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* server connections. Upon failure, a null store is passed to the callback. */
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void (*open_store)( store_conf_t *conf, const char *label,
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void (*cb)( store_t *ctx, void *aux ), void *aux );
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/* Allocate a store with the given configuration. This is expected to
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* return quickly, and must not fail. */
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store_t *(*alloc_store)( store_conf_t *conf, const char *label );
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/* Mark the store as available for recycling. Server connection may be kept alive. */
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void (*disown_store)( store_t *ctx );
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/* Open/connect the store. This may recycle existing server connections. */
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void (*connect_store)( store_t *ctx,
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void (*cb)( int sts, void *aux ), void *aux );
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/* Discard the store. Underlying server connection may be kept alive. */
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void (*free_store)( store_t *ctx );
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/* Discard the store after a bad_callback. The server connections will be closed.
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* Pending commands will have their callbacks synchronously invoked with DRV_CANCELED. */
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106
src/drv_imap.c
106
src/drv_imap.c
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@ -100,6 +100,7 @@ typedef struct imap_store {
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const char *prefix;
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const char *name;
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int ref_count;
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enum { SST_BAD, SST_HALF, SST_GOOD } state;
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/* trash folder's existence is not confirmed yet */
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enum { TrashUnknown, TrashChecking, TrashKnown } trashnc;
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uint got_namespace:1;
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@ -121,7 +122,7 @@ typedef struct imap_store {
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int expectEOF; /* received LOGOUT's OK or unsolicited BYE */
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int canceling; /* imap_cancel() is in progress */
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union {
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void (*imap_open)( store_t *srv, void *aux );
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void (*imap_open)( int sts, void *aux );
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void (*imap_cancel)( void *aux );
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} callbacks;
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void *callback_aux;
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@ -1423,6 +1424,15 @@ get_cmd_result_p2( imap_store_t *ctx, struct imap_cmd *cmd, int response )
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/******************* imap_cancel_store *******************/
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static void
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imap_cleanup_store( imap_store_t *ctx )
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{
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free_generic_messages( ctx->gen.msgs );
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free_string_list( ctx->gen.boxes );
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free( ctx->delimiter );
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}
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static void
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imap_cancel_store( store_t *gctx )
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{
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@ -1434,13 +1444,11 @@ imap_cancel_store( store_t *gctx )
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socket_close( &ctx->conn );
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cancel_sent_imap_cmds( ctx );
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cancel_pending_imap_cmds( ctx );
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free_generic_messages( ctx->gen.msgs );
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free_string_list( ctx->gen.boxes );
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free_list( ctx->ns_personal );
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free_list( ctx->ns_other );
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free_list( ctx->ns_shared );
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free_string_list( ctx->auth_mechs );
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free( ctx->delimiter );
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imap_cleanup_store( ctx );
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imap_deref( ctx );
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}
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@ -1460,7 +1468,7 @@ imap_invoke_bad_callback( imap_store_t *ctx )
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ctx->gen.bad_callback( ctx->gen.bad_callback_aux );
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}
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/******************* imap_disown_store *******************/
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/******************* imap_free_store *******************/
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static store_t *unowned;
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@ -1478,7 +1486,7 @@ imap_cancel_unowned( void *gctx )
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}
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static void
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imap_disown_store( store_t *gctx )
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imap_free_store( store_t *gctx )
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{
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free_generic_messages( gctx->msgs );
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gctx->msgs = 0;
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@ -1542,61 +1550,64 @@ static void imap_open_store_ssl_bail( imap_store_t * );
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#endif
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static void imap_open_store_bail( imap_store_t *, int );
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static void
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imap_open_store_bad( void *aux )
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{
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imap_open_store_bail( (imap_store_t *)aux, FAIL_TEMP );
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}
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static void
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imap_open_store( store_conf_t *conf, const char *label,
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void (*cb)( store_t *srv, void *aux ), void *aux )
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static store_t *
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imap_alloc_store( store_conf_t *conf, const char *label )
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{
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imap_store_conf_t *cfg = (imap_store_conf_t *)conf;
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imap_server_conf_t *srvc = cfg->server;
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imap_store_t *ctx;
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store_t **ctxp;
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/* First try to recycle a whole store. */
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for (ctxp = &unowned; (ctx = (imap_store_t *)*ctxp); ctxp = &ctx->gen.next)
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if (ctx->gen.conf == conf) {
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if (ctx->state == SST_GOOD && ctx->gen.conf == conf) {
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*ctxp = ctx->gen.next;
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ctx->label = label;
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cb( &ctx->gen, aux );
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return;
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return &ctx->gen;
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}
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/* Then try to recycle a server connection. */
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for (ctxp = &unowned; (ctx = (imap_store_t *)*ctxp); ctxp = &ctx->gen.next)
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if (((imap_store_conf_t *)ctx->gen.conf)->server == srvc) {
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if (ctx->state != SST_BAD && ((imap_store_conf_t *)ctx->gen.conf)->server == srvc) {
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*ctxp = ctx->gen.next;
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ctx->label = label;
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imap_cleanup_store( ctx );
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/* One could ping the server here, but given that the idle timeout
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* is at least 30 minutes, this sounds pretty pointless. */
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free_string_list( ctx->gen.boxes );
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ctx->gen.boxes = 0;
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ctx->gen.listed = 0;
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ctx->gen.conf = conf;
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free( ctx->delimiter );
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ctx->delimiter = 0;
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ctx->callbacks.imap_open = cb;
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ctx->callback_aux = aux;
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set_bad_callback( &ctx->gen, imap_open_store_bad, ctx );
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imap_open_store_namespace( ctx );
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return;
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ctx->state = SST_HALF;
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goto gotsrv;
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}
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/* Finally, schedule opening a new server connection. */
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ctx = nfcalloc( sizeof(*ctx) );
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ctx->gen.conf = conf;
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ctx->label = label;
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ctx->ref_count = 1;
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ctx->callbacks.imap_open = cb;
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ctx->callback_aux = aux;
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set_bad_callback( &ctx->gen, imap_open_store_bad, ctx );
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ctx->in_progress_append = &ctx->in_progress;
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ctx->pending_append = &ctx->pending;
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socket_init( &ctx->conn, &srvc->sconf,
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(void (*)( void * ))imap_invoke_bad_callback,
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imap_socket_read, (void (*)(void *))flush_imap_cmds, ctx );
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ctx->in_progress_append = &ctx->in_progress;
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ctx->pending_append = &ctx->pending;
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gotsrv:
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ctx->gen.conf = conf;
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ctx->label = label;
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ctx->ref_count = 1;
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return &ctx->gen;
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}
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static void
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imap_connect_store( store_t *gctx,
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void (*cb)( int sts, void *aux ), void *aux )
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{
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imap_store_t *ctx = (imap_store_t *)gctx;
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if (ctx->state == SST_GOOD) {
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cb( DRV_OK, aux );
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} else {
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ctx->callbacks.imap_open = cb;
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ctx->callback_aux = aux;
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if (ctx->state == SST_HALF)
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imap_open_store_namespace( ctx );
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else
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socket_connect( &ctx->conn, imap_open_store_connected );
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}
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}
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static void
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@ -2091,6 +2102,7 @@ imap_open_store_namespace( imap_store_t *ctx )
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{
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imap_store_conf_t *cfg = (imap_store_conf_t *)ctx->gen.conf;
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ctx->state = SST_HALF;
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ctx->prefix = cfg->gen.path;
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ctx->delimiter = cfg->delimiter ? nfstrdup( cfg->delimiter ) : 0;
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if (((!ctx->prefix && cfg->use_namespace) || !cfg->delimiter) && CAP(NAMESPACE)) {
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@ -2140,11 +2152,11 @@ imap_open_store_namespace2( imap_store_t *ctx )
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static void
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imap_open_store_finalize( imap_store_t *ctx )
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{
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set_bad_callback( &ctx->gen, 0, 0 );
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ctx->state = SST_GOOD;
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if (!ctx->prefix)
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ctx->prefix = "";
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ctx->trashnc = TrashUnknown;
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ctx->callbacks.imap_open( &ctx->gen, ctx->callback_aux );
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ctx->callbacks.imap_open( DRV_OK, ctx->callback_aux );
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}
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#ifdef HAVE_LIBSSL
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@ -2160,11 +2172,8 @@ imap_open_store_ssl_bail( imap_store_t *ctx )
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static void
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imap_open_store_bail( imap_store_t *ctx, int failed )
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{
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void (*cb)( store_t *srv, void *aux ) = ctx->callbacks.imap_open;
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void *aux = ctx->callback_aux;
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((imap_store_conf_t *)ctx->gen.conf)->server->failed = failed;
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imap_cancel_store( &ctx->gen );
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cb( 0, aux );
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ctx->callbacks.imap_open( DRV_STORE_BAD, ctx->callback_aux );
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}
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/******************* imap_open_box *******************/
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@ -2945,8 +2954,9 @@ struct driver imap_driver = {
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DRV_CRLF | DRV_VERBOSE,
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imap_parse_store,
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imap_cleanup,
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imap_open_store,
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imap_disown_store,
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imap_alloc_store,
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imap_connect_store,
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imap_free_store,
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imap_cancel_store,
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imap_list_store,
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imap_select_box,
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@ -194,35 +194,40 @@ maildir_validate_path( maildir_store_conf_t *conf )
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static void lcktmr_timeout( void *aux );
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static void
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maildir_open_store( store_conf_t *gconf, const char *label ATTR_UNUSED,
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void (*cb)( store_t *ctx, void *aux ), void *aux )
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static store_t *
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maildir_alloc_store( store_conf_t *gconf, const char *label ATTR_UNUSED )
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{
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maildir_store_conf_t *conf = (maildir_store_conf_t *)gconf;
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maildir_store_t *ctx;
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ctx = nfcalloc( sizeof(*ctx) );
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ctx->gen.conf = gconf;
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ctx->uvfd = -1;
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init_wakeup( &ctx->lcktmr, lcktmr_timeout, ctx );
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if (gconf->path && maildir_validate_path( conf ) < 0) {
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free( ctx );
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cb( 0, aux );
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return &ctx->gen;
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}
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static void
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maildir_connect_store( store_t *gctx,
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void (*cb)( int sts, void *aux ), void *aux )
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{
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maildir_store_t *ctx = (maildir_store_t *)gctx;
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maildir_store_conf_t *conf = (maildir_store_conf_t *)ctx->gen.conf;
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if (conf->gen.path && maildir_validate_path( conf ) < 0) {
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cb( DRV_STORE_BAD, aux );
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return;
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}
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if (gconf->trash) {
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if (conf->gen.trash) {
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if (maildir_ensure_path( conf ) < 0) {
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free( ctx );
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cb( 0, aux );
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cb( DRV_STORE_BAD, aux );
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return;
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}
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if (!(ctx->trash = maildir_join_path( conf, gconf->path, gconf->trash ))) {
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free( ctx );
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cb( 0, aux );
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if (!(ctx->trash = maildir_join_path( conf, conf->gen.path, conf->gen.trash ))) {
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cb( DRV_STORE_BAD, aux );
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return;
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}
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}
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cb( &ctx->gen, aux );
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cb( DRV_OK, aux );
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}
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static void
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@ -256,7 +261,7 @@ maildir_cleanup( store_t *gctx )
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}
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static void
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maildir_disown_store( store_t *gctx )
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maildir_free_store( store_t *gctx )
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{
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maildir_store_t *ctx = (maildir_store_t *)gctx;
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@ -1761,9 +1766,10 @@ struct driver maildir_driver = {
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0, /* XXX DRV_CRLF? */
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maildir_parse_store,
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maildir_cleanup_drv,
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maildir_open_store,
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maildir_disown_store,
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maildir_disown_store, /* _cancel_, but it's the same */
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maildir_alloc_store,
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maildir_connect_store,
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maildir_free_store,
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maildir_free_store, /* _cancel_, but it's the same */
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maildir_list_store,
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maildir_select_box,
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maildir_create_box,
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98
src/main.c
98
src/main.c
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@ -727,10 +727,33 @@ main( int argc, char **argv )
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}
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#define ST_FRESH 0
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#define ST_OPEN 1
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#define ST_CLOSED 2
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#define ST_CONNECTED 1
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#define ST_OPEN 2
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#define ST_CANCELING 3
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#define ST_CLOSED 4
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static void store_opened( store_t *ctx, void *aux );
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static void
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cancel_prep_done( void *aux )
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{
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MVARS(aux)
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mvars->drv[t]->free_store( mvars->ctx[t] );
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mvars->state[t] = ST_CLOSED;
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sync_chans( mvars, E_OPEN );
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}
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static void
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store_bad( void *aux )
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{
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MVARS(aux)
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mvars->drv[t]->cancel_store( mvars->ctx[t] );
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mvars->state[t] = ST_CLOSED;
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mvars->ret = mvars->skip = 1;
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sync_chans( mvars, E_OPEN );
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}
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static void store_connected( int sts, void *aux );
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static void store_listed( int sts, void *aux );
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static int sync_listed_boxes( main_vars_t *mvars, box_ent_t *mbox );
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static void done_sync_2_dyn( int sts, void *aux );
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@ -771,17 +794,18 @@ sync_chans( main_vars_t *mvars, int ent )
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labels[M] = "M: ", labels[S] = "S: ";
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else
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labels[M] = labels[S] = "";
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for (t = 0; t < 2; t++) {
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mvars->drv[t] = mvars->chan->stores[t]->driver;
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mvars->ctx[t] = mvars->drv[t]->alloc_store( mvars->chan->stores[t], labels[t] );
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set_bad_callback( mvars->ctx[t], store_bad, AUX );
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}
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for (t = 0; ; t++) {
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info( "Opening %s store %s...\n", str_ms[t], mvars->chan->stores[t]->name );
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mvars->drv[t] = mvars->chan->stores[t]->driver;
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mvars->drv[t]->open_store( mvars->chan->stores[t], labels[t], store_opened, AUX );
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if (t)
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break;
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if (mvars->skip) {
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mvars->state[1] = ST_CLOSED;
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mvars->drv[t]->connect_store( mvars->ctx[t], store_connected, AUX );
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if (t || mvars->skip)
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break;
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}
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}
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mvars->cben = 1;
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opened:
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if (mvars->skip)
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@ -856,13 +880,19 @@ sync_chans( main_vars_t *mvars, int ent )
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}
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next:
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mvars->cben = 0;
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for (t = 0; t < 2; t++)
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if (mvars->state[t] == ST_OPEN) {
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mvars->drv[t]->disown_store( mvars->ctx[t] );
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if (mvars->state[t] == ST_FRESH) {
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/* An unconnected store may be only cancelled. */
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mvars->state[t] = ST_CLOSED;
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mvars->drv[t]->cancel_store( mvars->ctx[t] );
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} else if (mvars->state[t] == ST_CONNECTED || mvars->state[t] == ST_OPEN) {
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mvars->state[t] = ST_CANCELING;
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mvars->drv[t]->cancel_cmds( mvars->ctx[t], cancel_prep_done, AUX );
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}
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mvars->cben = 1;
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if (mvars->state[M] != ST_CLOSED || mvars->state[S] != ST_CLOSED) {
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mvars->skip = mvars->cben = 1;
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mvars->skip = 1;
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return;
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}
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if (mvars->chanptr->boxlist == 2) {
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||||
|
|
@ -885,31 +915,17 @@ sync_chans( main_vars_t *mvars, int ent )
|
|||
}
|
||||
|
||||
static void
|
||||
store_bad( void *aux )
|
||||
{
|
||||
MVARS(aux)
|
||||
|
||||
mvars->drv[t]->cancel_store( mvars->ctx[t] );
|
||||
mvars->ret = mvars->skip = 1;
|
||||
mvars->state[t] = ST_CLOSED;
|
||||
sync_chans( mvars, E_OPEN );
|
||||
}
|
||||
|
||||
static void
|
||||
store_opened( store_t *ctx, void *aux )
|
||||
store_connected( int sts, void *aux )
|
||||
{
|
||||
MVARS(aux)
|
||||
string_list_t *cpat;
|
||||
int cflags;
|
||||
|
||||
if (!ctx) {
|
||||
mvars->ret = mvars->skip = 1;
|
||||
mvars->state[t] = ST_CLOSED;
|
||||
sync_chans( mvars, E_OPEN );
|
||||
switch (sts) {
|
||||
case DRV_CANCELED:
|
||||
return;
|
||||
}
|
||||
mvars->ctx[t] = ctx;
|
||||
if (!mvars->skip && !mvars->chanptr->boxlist && mvars->chan->patterns && !ctx->listed) {
|
||||
case DRV_OK:
|
||||
if (!mvars->skip && !mvars->chanptr->boxlist && mvars->chan->patterns && !mvars->ctx[t]->listed) {
|
||||
for (cflags = 0, cpat = mvars->chan->patterns; cpat; cpat = cpat->next) {
|
||||
const char *pat = cpat->string;
|
||||
if (*pat != '!') {
|
||||
|
|
@ -925,7 +941,7 @@ store_opened( store_t *ctx, void *aux )
|
|||
flags |= LIST_INBOX;
|
||||
} else if (c == '/') {
|
||||
/* Flattened sub-folders of INBOX actually end up in Path. */
|
||||
if (ctx->conf->flat_delim)
|
||||
if (mvars->ctx[t]->conf->flat_delim)
|
||||
flags |= LIST_PATH;
|
||||
else
|
||||
flags |= LIST_INBOX;
|
||||
|
|
@ -945,12 +961,18 @@ store_opened( store_t *ctx, void *aux )
|
|||
cflags |= flags;
|
||||
}
|
||||
}
|
||||
set_bad_callback( ctx, store_bad, AUX );
|
||||
mvars->drv[t]->list_store( ctx, cflags, store_listed, AUX );
|
||||
} else {
|
||||
mvars->state[t] = ST_OPEN;
|
||||
sync_chans( mvars, E_OPEN );
|
||||
mvars->state[t] = ST_CONNECTED;
|
||||
mvars->drv[t]->list_store( mvars->ctx[t], cflags, store_listed, AUX );
|
||||
return;
|
||||
}
|
||||
mvars->state[t] = ST_OPEN;
|
||||
break;
|
||||
default:
|
||||
mvars->ret = mvars->skip = 1;
|
||||
mvars->state[t] = ST_OPEN;
|
||||
break;
|
||||
}
|
||||
sync_chans( mvars, E_OPEN );
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
|
|||
|
|
@ -516,6 +516,7 @@ socket_connected( conn_t *conn )
|
|||
{
|
||||
#ifdef HAVE_IPV6
|
||||
freeaddrinfo( conn->addrs );
|
||||
conn->addrs = 0;
|
||||
#endif
|
||||
conf_notifier( &conn->notify, 0, POLLIN );
|
||||
socket_expect_read( conn, 0 );
|
||||
|
|
@ -528,6 +529,7 @@ socket_connect_bail( conn_t *conn )
|
|||
{
|
||||
#ifdef HAVE_IPV6
|
||||
freeaddrinfo( conn->addrs );
|
||||
conn->addrs = 0;
|
||||
#endif
|
||||
free( conn->name );
|
||||
conn->name = 0;
|
||||
|
|
@ -543,6 +545,12 @@ socket_close( conn_t *sock )
|
|||
socket_close_internal( sock );
|
||||
free( sock->name );
|
||||
sock->name = 0;
|
||||
#ifdef HAVE_IPV6
|
||||
if (sock->addrs) {
|
||||
freeaddrinfo( sock->addrs );
|
||||
sock->addrs = 0;
|
||||
}
|
||||
#endif
|
||||
#ifdef HAVE_LIBSSL
|
||||
if (sock->ssl) {
|
||||
SSL_free( sock->ssl );
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user