[evolution-data-server/gnome-2-30] Fix handling of unsolicited [CAPABILITY xxx] report in server greeting.

[David Woodhouse <dwmw2 src gnome org>]

commit 7760b521d0bb094292ec819dbd9f625ada37a6e4
Author: David Woodhouse <David Woodhouse intel com>
Date:   Thu Jun 17 14:08:59 2010 +0100

    Fix handling of unsolicited [CAPABILITY xxx] report in server greeting.
    
    Fix up imapx_untagged() and imap_parse_status() to handle capabilities,
    and use imapx_untagged() to read the server greeting.
    
    Unify the greeting handling for the process and socket connections, and
    don't re-fetch the capabilities immediately if we have them.
    
    Handle incoming lines of noise before the greeting.
    (cherry picked from commit 4fcd06b696ad30804fcb5a140a9253f9cea6114c)

 camel/providers/imapx/camel-imapx-server.c |  110 ++++++++++++++++------------
 camel/providers/imapx/camel-imapx-utils.c  |   10 ++-
 camel/providers/imapx/camel-imapx-utils.h  |    1 +
 3 files changed, 72 insertions(+), 49 deletions(-)
---
diff --git a/camel/providers/imapx/camel-imapx-server.c b/camel/providers/imapx/camel-imapx-server.c
index 649d6a2..3c1a1f6 100644
--- a/camel/providers/imapx/camel-imapx-server.c
+++ b/camel/providers/imapx/camel-imapx-server.c
@@ -1394,11 +1394,18 @@ imapx_untagged(CamelIMAPXServer *imap, CamelException *ex)
 		}
 		break;
 	}
-	case IMAPX_BYE: case IMAPX_OK: case IMAPX_NO: case IMAPX_BAD: case IMAPX_PREAUTH:
+	case IMAPX_PREAUTH:
+		c(printf("preauthenticated\n"));
+		if (imap->state < IMAPX_AUTHENTICATED)
+			imap->state = IMAPX_AUTHENTICATED;
+		/* fall through... */
+	case IMAPX_BYE: case IMAPX_OK: case IMAPX_NO: case IMAPX_BAD:
 		/* TODO: validate which ones of these can happen as unsolicited responses */
 		/* TODO: handle bye/preauth differently */
 		camel_imapx_stream_ungettoken(imap->stream, tok, token, len);
 		sinfo = imapx_parse_status(imap->stream, ex);
+		if (camel_exception_is_set(ex))
+			return -1;
 		camel_object_trigger_event(imap, "status", sinfo);
 		switch (sinfo->condition) {
 		case IMAPX_READ_WRITE:
@@ -1424,6 +1431,14 @@ imapx_untagged(CamelIMAPXServer *imap, CamelException *ex)
 		case IMAPX_PARSE:
 			c(printf("PARSE: %s\n", sinfo->text));
 			break;
+		case IMAPX_CAPABILITY:
+			if (sinfo->u.cinfo) {
+				if (imap->cinfo)
+					imapx_free_capability(imap->cinfo);
+				imap->cinfo = sinfo->u.cinfo;
+				c(printf("got capability flags %08x\n", imap->cinfo->capa));
+			}
+			break;
 		default:
 			break;
 		}
@@ -2114,15 +2129,12 @@ imapx_select (CamelIMAPXServer *is, CamelFolder *folder, gboolean forced, CamelE
 static gboolean
 connect_to_server_process (CamelIMAPXServer *is, const gchar *cmd, CamelException *ex)
 {
-	CamelIMAPXCommand *ic;
 	CamelStream *cmd_stream;
 	gint ret, i = 0;
 	gchar *buf;
 	gchar *cmd_copy;
 	gchar *full_cmd;
 	gchar *child_env[7];
-	guchar *buffer = NULL;
-	guint len;
 
 	/* Put full details in the environment, in case the connection
 	   program needs them */
@@ -2214,36 +2226,6 @@ connect_to_server_process (CamelIMAPXServer *is, const gchar *cmd, CamelExceptio
 	camel_object_unref(cmd_stream);
 	is->is_process_stream = TRUE;
 
-	camel_imapx_stream_gets (is->stream, &buffer, &len);
-	e(printf("Got greeting '%.*s'\n", len, buffer));
-
-	if (!buffer) {
-		camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
-				     "No response from server.\n");
-		return FALSE;
-	} else if (!strncmp((gchar *)buffer, "* PREAUTH", 9)) {
-		is->state = IMAPX_AUTHENTICATED;
-	} else if (strncmp((gchar *)buffer, "* OK", 4)) {
-		camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
-				     "Unrecognised greeting from server: %.*s\n",
-				     len, buffer);
-		return FALSE;
-	}
-
-	ic = camel_imapx_command_new("CAPABILITY", NULL, "CAPABILITY");
-	imapx_command_run(is, ic);
-
-	if (camel_exception_is_set (ic->ex) || ic->status->result != IMAPX_OK) {
-		if (!camel_exception_is_set (ic->ex))
-			camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, "%s", ic->status->text);
-		else
-			camel_exception_xfer (ex, ic->ex);
-
-		camel_imapx_command_free(ic);
-		return FALSE;
-	}
-	camel_imapx_command_free(ic);
-
 	return TRUE;
 }
 #endif /* G_OS_WIN32 */
@@ -2258,8 +2240,9 @@ imapx_connect_to_server (CamelIMAPXServer *is, CamelException *ex)
 #ifdef HAVE_SSL
 	const gchar *mode;
 #endif
-	guchar *buffer = NULL;
 	guint len;
+	guchar *token;
+	gint tok;
 	const gchar *serv;
 	const gchar *port = NULL;
 	struct addrinfo *ai, hints = { 0 };
@@ -2270,8 +2253,12 @@ imapx_connect_to_server (CamelIMAPXServer *is, CamelException *ex)
 
 	if (camel_url_get_param(is->url, "use_command") &&
 	    (command = camel_url_get_param(is->url, "command"))) {
+		camel_exception_clear(ex);
 		connect_to_server_process(is, command, ex);
-		goto exit;
+		if (camel_exception_is_set (ex))
+			goto exit;
+		else
+			goto connected;
 	}
 #endif
 	if (is->url->port) {
@@ -2343,22 +2330,48 @@ imapx_connect_to_server (CamelIMAPXServer *is, CamelException *ex)
 	sockopt.value.keep_alive = TRUE;
 	camel_tcp_stream_setsockopt ((CamelTcpStream *)tcp_stream, &sockopt);
 
-	camel_imapx_stream_gets (is->stream, &buffer, &len);
-	e(printf("Got greeting '%.*s'\n", len, buffer));
+ connected:
+	while (1) {
+		// poll ?  wait for other stuff? loop?
+		if (camel_application_is_exiting || is->parser_quit) {
+			camel_exception_set (ex, CAMEL_EXCEPTION_USER_CANCEL,
+					     "Connection to server cancelled\n");
+			return FALSE;
+		}
+			
+		tok = camel_imapx_stream_token (is->stream, &token, &len, ex);
+		if (camel_exception_is_set (ex)) {
+			return FALSE;
+		}
 
-	ic = camel_imapx_command_new("CAPABILITY", NULL, "CAPABILITY");
-	imapx_command_run(is, ic);
+		if (tok == '*') {
+			imapx_untagged (is, ex);
+			break;
+		}
+		camel_imapx_stream_ungettoken(is->stream, tok, token, len);
+		camel_imapx_stream_text (is->stream, &token, ex);
+		if (camel_exception_is_set (ex)) {
+			return FALSE;
+		}
+		e(printf("Got unexpected line before greeting:  '%s'\n", token));
+		g_free(token);
+	}
 
-	if (camel_exception_is_set (ic->ex) || ic->status->result != IMAPX_OK) {
-		if (!camel_exception_is_set (ic->ex))
-			camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, "%s", ic->status->text);
-		else
-			camel_exception_xfer (ex, ic->ex);
+	if (!is->cinfo) {
+		ic = camel_imapx_command_new("CAPABILITY", NULL, "CAPABILITY");
+		imapx_command_run(is, ic);
 
+		if (camel_exception_is_set (ic->ex) || ic->status->result != IMAPX_OK) {
+			if (!camel_exception_is_set (ic->ex))
+				camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, "%s", ic->status->text);
+			else
+				camel_exception_xfer (ex, ic->ex);
+
+			camel_imapx_command_free(ic);
+			return FALSE;
+		}
 		camel_imapx_command_free(ic);
-		goto exit;
 	}
-	camel_imapx_command_free(ic);
 
 #ifdef HAVE_SSL
 	if (ssl_mode == 2)
@@ -2436,7 +2449,7 @@ imapx_reconnect (CamelIMAPXServer *is, CamelException *ex)
 			goto exception;
 
 		if (is->state == IMAPX_AUTHENTICATED)
-			break;
+			goto preauthed;
 
 		if (!authtype && service->url->authmech) {
 			if (is->cinfo && !g_hash_table_lookup (is->cinfo->auth_types, service->url->authmech)) {
@@ -2539,6 +2552,7 @@ imapx_reconnect (CamelIMAPXServer *is, CamelException *ex)
 
 	is->state = IMAPX_AUTHENTICATED;
 
+ preauthed:
 	if (((CamelIMAPXStore *)is->store)->rec_options & IMAPX_USE_IDLE)
 		is->use_idle = TRUE;
 	else
diff --git a/camel/providers/imapx/camel-imapx-utils.c b/camel/providers/imapx/camel-imapx-utils.c
index af24e34..72ff198 100644
--- a/camel/providers/imapx/camel-imapx-utils.c
+++ b/camel/providers/imapx/camel-imapx-utils.c
@@ -406,8 +406,13 @@ imapx_parse_capability(CamelIMAPXStream *stream, CamelException *ex)
 	cinfo->auth_types = g_hash_table_new_full (g_str_hash, g_str_equal, (GDestroyNotify) g_free, NULL);
 
 	/* FIXME: handle auth types */
-	while (!camel_exception_is_set (ex) && (tok = camel_imapx_stream_token(stream, &token, &len, ex)) != '\n') {
+	while ((tok = camel_imapx_stream_token(stream, &token, &len, ex)) != '\n' &&
+	       !camel_exception_is_set (ex)) {
 		switch (tok) {
+			case ']':
+				/* Put it back so that imapx_untagged() isn't unhappy */
+				camel_imapx_stream_ungettoken(stream, tok, token, len);
+				return cinfo;
 			case 43:
 				token = (guchar *) g_strconcat ((gchar *)token, "+", NULL);
 				free_token = TRUE;
@@ -1636,6 +1641,9 @@ imapx_parse_status(CamelIMAPXStream *is, CamelException *ex)
 			case IMAPX_UNSEEN:
 				sinfo->u.unseen = camel_imapx_stream_number(is, ex);
 				break;
+			case IMAPX_CAPABILITY:
+				sinfo->u.cinfo = imapx_parse_capability(is, ex);
+				break;
 			default:
 				sinfo->condition = IMAPX_UNKNOWN;
 				d(printf("Got unknown response code: %s: ignored\n", token));
diff --git a/camel/providers/imapx/camel-imapx-utils.h b/camel/providers/imapx/camel-imapx-utils.h
index 97a437e..9f2c4c3 100644
--- a/camel/providers/imapx/camel-imapx-utils.h
+++ b/camel/providers/imapx/camel-imapx-utils.h
@@ -159,6 +159,7 @@ struct _status_info {
 			GPtrArray *uids;
 			GPtrArray *copied_uids;
 		} copyuid;
+		struct _capability_info *cinfo;
 	} u;
 
 	gchar *text;