Add server-fuzz to fe-fuzz

Based on test-796.c in the tests directory.

src/fe-fuzz/Makefile.am

@@ -1,6 +1,6 @@
 SUBDIRS = irc fe-common
 
-bin_PROGRAMS = irssi-fuzz
+bin_PROGRAMS = irssi-fuzz server-fuzz
 
 # Force link with CXX for libfuzzer support
 CCLD=$(CXX) $(CXXFLAGS)
@@ -21,7 +21,18 @@ irssi_fuzz_LDADD = \
 
 irssi_fuzz_SOURCES = \
         irssi.c \
-	$(top_srcdir)/src/fe-text/module-formats.c
+	../fe-text/module-formats.c
+
+server_fuzz_DEPENDENCIES = @COMMON_LIBS@
+
+server_fuzz_LDADD = \
+	@COMMON_LIBS@ \
+	@PROG_LIBS@ \
+	$(FUZZER_LIBS)
+
+server_fuzz_SOURCES = \
+	server.c \
+	../fe-text/module-formats.c
 
 noinst_HEADERS = \
-	$(top_srcdir)/src/fe-text/module-formats.h
+	../fe-text/module-formats.h

src/fe-fuzz/server.c

@@ -0,0 +1,176 @@
+/*
+ server.c : irssi
+
+    Copyright (C) 2018 Joseph Bisch
+
+    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
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "module.h"
+#include "modules-load.h"
+#include "module-formats.h"
+#include "levels.h"
+#include "themes.h"
+#include "core.h"
+#include "fe-common-core.h"
+#include "args.h"
+#include "printtext.h"
+#include "misc.h"
+#include "servers-setup.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "irc.h"
+#include "irc-servers.h"
+#include "irc-channels.h"
+
+/* irc.c */
+void irc_init(void);
+void irc_deinit(void);
+
+/* irc-session.c */
+void irc_session_init(void);
+void irc_session_deinit(void);
+
+/* fe-common-irc.c */
+void fe_common_irc_init(void);
+void fe_common_irc_deinit(void);
+
+SERVER_REC *server;
+
+void event_connected(IRC_SERVER_REC *server, const char *data, const char *from)
+{
+	char *params, *nick;
+
+	g_return_if_fail(server != NULL);
+
+	params = event_get_params(data, 1, &nick);
+
+	if (g_strcmp0(server->nick, nick) != 0) {
+		/* nick changed unexpectedly .. connected via proxy, etc. */
+		g_free(server->nick);
+		server->nick = g_strdup(nick);
+	}
+
+	/* set the server address */
+	g_free(server->real_address);
+	server->real_address = from == NULL ?
+		g_strdup(server->connrec->address) : /* shouldn't happen.. */
+		g_strdup(from);
+
+	/* last welcome message found - commands can be sent to server now. */
+	server->connected = 1;
+	server->real_connect_time = time(NULL);
+
+	/* let the queue send now that we are identified */
+	g_get_current_time(&server->wait_cmd);
+
+	if (server->connrec->usermode != NULL) {
+		/* Send the user mode, before the autosendcmd.
+		 * Do not pass this through cmd_mode because it
+		 * is not known whether the resulting MODE message
+		 * (if any) is the initial umode or a reply to this.
+		 */
+		irc_send_cmdv(server, "MODE %s %s", server->nick,
+				server->connrec->usermode);
+		g_free_not_null(server->wanted_usermode);
+		server->wanted_usermode = g_strdup(server->connrec->usermode);
+	}
+
+	signal_emit("event connected", 1, server);
+	g_free(params);
+}
+
+void irc_server_init_bare_minimum(IRC_SERVER_REC *server) {
+	server->isupport = g_hash_table_new((GHashFunc) g_istr_hash,
+					    (GCompareFunc) g_istr_equal);
+
+	/* set the standards */
+	g_hash_table_insert(server->isupport, g_strdup("CHANMODES"), g_strdup("beI,k,l,imnpst"));
+	g_hash_table_insert(server->isupport, g_strdup("PREFIX"), g_strdup("(ohv)@%+"));
+}
+
+void test_server() {
+	//SERVER_REC *server; /* = g_new0(IRC_SERVER_REC, 1); */
+	CHAT_PROTOCOL_REC *proto;
+	SERVER_CONNECT_REC *conn;
+
+	proto = chat_protocol_find("IRC");
+	conn = server_create_conn(proto->id, "localhost", 0, "", "", "user");
+	server = proto->server_init_connect(conn);
+	server->session_reconnect = TRUE;
+	server->tag = g_strdup("testserver");
+
+	/* we skip some initialisations that would try to send data */
+	/* irc_servers_deinit(); */
+	irc_session_deinit();
+	irc_irc_deinit();
+
+	server_connect_finished(server);
+
+	/* make up for the skipped session init */
+	irc_server_init_bare_minimum(IRC_SERVER(server));
+
+	irc_irc_init();
+	irc_session_init();
+	/* irc_servers_init(); */
+
+	server_connect_unref(conn);
+}
+
+int LLVMFuzzerInitialize(int *argc, char ***argv) {
+	core_register_options();
+	fe_common_core_register_options();
+	/* no args */
+	args_execute(0, NULL);
+	core_preinit((*argv)[0]);
+	core_init();
+	irc_init();
+	fe_common_core_init();
+	fe_common_irc_init();
+	signal_add("event 001", (SIGNAL_FUNC) event_connected);
+	module_register("core", "fe-fuzz");
+	return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+	if (size < 1) return 0;
+
+	test_server();
+	gboolean prefixedChoice = (gboolean)*data;
+	gchar *copy = g_strndup((const gchar *)data+1, size-1);
+	gchar **lines = g_strsplit(copy, "\r\n", -1);
+	gchar **head = lines;
+
+	for (; *lines != NULL; lines++) {
+		gchar *prefixedLine;
+		if (prefixedChoice) {
+			prefixedLine = g_strdup_printf(":user %s\n", *lines);
+		} else {
+			prefixedLine = g_strdup_printf("%s\n", *lines);
+		}
+		signal_emit("server incoming", 2, server, prefixedLine);
+		g_free(prefixedLine);
+	}
+
+	g_strfreev(head);
+	g_free(copy);
+	server_unref(server);
+	return 0;
+}