diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/net/tcp/syslogs.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/net/tcp/syslogs.c')
-rw-r--r-- | qemu/roms/ipxe/src/net/tcp/syslogs.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/net/tcp/syslogs.c b/qemu/roms/ipxe/src/net/tcp/syslogs.c new file mode 100644 index 000000000..095afc543 --- /dev/null +++ b/qemu/roms/ipxe/src/net/tcp/syslogs.c @@ -0,0 +1,269 @@ +/* + * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>. + * + * 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 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. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +/** @file + * + * Encrypted syslog protocol + * + */ + +#include <stdint.h> +#include <stdlib.h> +#include <byteswap.h> +#include <ipxe/xfer.h> +#include <ipxe/open.h> +#include <ipxe/tcpip.h> +#include <ipxe/dhcp.h> +#include <ipxe/settings.h> +#include <ipxe/console.h> +#include <ipxe/lineconsole.h> +#include <ipxe/tls.h> +#include <ipxe/syslog.h> +#include <config/console.h> + +/* Set default console usage if applicable */ +#if ! ( defined ( CONSOLE_SYSLOGS ) && CONSOLE_EXPLICIT ( CONSOLE_SYSLOGS ) ) +#undef CONSOLE_SYSLOGS +#define CONSOLE_SYSLOGS ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_TUI ) +#endif + +struct console_driver syslogs_console __console_driver; + +/** The encrypted syslog server */ +static struct sockaddr_tcpip logserver = { + .st_port = htons ( SYSLOG_PORT ), +}; + +/** + * Handle encrypted syslog TLS interface close + * + * @v intf Interface + * @v rc Reason for close + */ +static void syslogs_close ( struct interface *intf __unused, int rc ) { + + DBG ( "SYSLOGS console disconnected: %s\n", strerror ( rc ) ); +} + +/** + * Handle encrypted syslog TLS interface window change + * + * @v intf Interface + */ +static void syslogs_window_changed ( struct interface *intf ) { + + /* Mark console as enabled when window first opens, indicating + * that TLS negotiation is complete. (Do not disable console + * when window closes again, since TCP will close the window + * whenever there is unACKed data.) + */ + if ( xfer_window ( intf ) ) { + if ( syslogs_console.disabled ) + DBG ( "SYSLOGS console connected\n" ); + syslogs_console.disabled = 0; + } +} + +/** Encrypted syslog TLS interface operations */ +static struct interface_operation syslogs_operations[] = { + INTF_OP ( xfer_window_changed, struct interface *, + syslogs_window_changed ), + INTF_OP ( intf_close, struct interface *, syslogs_close ), +}; + +/** Encrypted syslog TLS interface descriptor */ +static struct interface_descriptor syslogs_desc = + INTF_DESC_PURE ( syslogs_operations ); + +/** The encrypted syslog TLS interface */ +static struct interface syslogs = INTF_INIT ( syslogs_desc ); + +/****************************************************************************** + * + * Console driver + * + ****************************************************************************** + */ + +/** Encrypted syslog line buffer */ +static char syslogs_buffer[SYSLOG_BUFSIZE]; + +/** Encrypted syslog severity */ +static unsigned int syslogs_severity = SYSLOG_DEFAULT_SEVERITY; + +/** + * Handle ANSI set encrypted syslog priority (private sequence) + * + * @v ctx ANSI escape sequence context + * @v count Parameter count + * @v params List of graphic rendition aspects + */ +static void syslogs_handle_priority ( struct ansiesc_context *ctx __unused, + unsigned int count __unused, + int params[] ) { + if ( params[0] >= 0 ) { + syslogs_severity = params[0]; + } else { + syslogs_severity = SYSLOG_DEFAULT_SEVERITY; + } +} + +/** Encrypted syslog ANSI escape sequence handlers */ +static struct ansiesc_handler syslogs_handlers[] = { + { ANSIESC_LOG_PRIORITY, syslogs_handle_priority }, + { 0, NULL } +}; + +/** Encrypted syslog line console */ +static struct line_console syslogs_line = { + .buffer = syslogs_buffer, + .len = sizeof ( syslogs_buffer ), + .ctx = { + .handlers = syslogs_handlers, + }, +}; + +/** Encrypted syslog recursion marker */ +static int syslogs_entered; + +/** + * Print a character to encrypted syslog console + * + * @v character Character to be printed + */ +static void syslogs_putchar ( int character ) { + int rc; + + /* Ignore if we are already mid-logging */ + if ( syslogs_entered ) + return; + + /* Fill line buffer */ + if ( line_putchar ( &syslogs_line, character ) == 0 ) + return; + + /* Guard against re-entry */ + syslogs_entered = 1; + + /* Send log message */ + if ( ( rc = syslog_send ( &syslogs, syslogs_severity, + syslogs_buffer, "\n" ) ) != 0 ) { + DBG ( "SYSLOGS could not send log message: %s\n", + strerror ( rc ) ); + } + + /* Clear re-entry flag */ + syslogs_entered = 0; +} + +/** Encrypted syslog console driver */ +struct console_driver syslogs_console __console_driver = { + .putchar = syslogs_putchar, + .disabled = CONSOLE_DISABLED, + .usage = CONSOLE_SYSLOGS, +}; + +/****************************************************************************** + * + * Settings + * + ****************************************************************************** + */ + +/** Encrypted syslog server setting */ +const struct setting syslogs_setting __setting ( SETTING_MISC, syslogs ) = { + .name = "syslogs", + .description = "Encrypted syslog server", + .tag = DHCP_EB_SYSLOGS_SERVER, + .type = &setting_type_string, +}; + +/** + * Apply encrypted syslog settings + * + * @ret rc Return status code + */ +static int apply_syslogs_settings ( void ) { + static char *old_server; + char *server; + struct interface *socket; + int rc; + + /* Fetch log server */ + fetch_string_setting_copy ( NULL, &syslogs_setting, &server ); + + /* Do nothing unless log server has changed */ + if ( ( ( server == NULL ) && ( old_server == NULL ) ) || + ( ( server != NULL ) && ( old_server != NULL ) && + ( strcmp ( server, old_server ) == 0 ) ) ) { + rc = 0; + goto out_no_change; + } + free ( old_server ); + old_server = NULL; + + /* Reset encrypted syslog connection */ + syslogs_console.disabled = CONSOLE_DISABLED; + intf_restart ( &syslogs, 0 ); + + /* Do nothing unless we have a log server */ + if ( ! server ) { + DBG ( "SYSLOGS has no log server\n" ); + rc = 0; + goto out_no_server; + } + + /* Add TLS filter */ + if ( ( rc = add_tls ( &syslogs, server, &socket ) ) != 0 ) { + DBG ( "SYSLOGS cannot create TLS filter: %s\n", + strerror ( rc ) ); + goto err_add_tls; + } + + /* Connect to log server */ + if ( ( rc = xfer_open_named_socket ( socket, SOCK_STREAM, + (( struct sockaddr *) &logserver ), + server, NULL ) ) != 0 ) { + DBG ( "SYSLOGS cannot connect to log server: %s\n", + strerror ( rc ) ); + goto err_open_named_socket; + } + DBG ( "SYSLOGS using log server %s\n", server ); + + /* Record log server */ + old_server = server; + server = NULL; + + /* Success */ + rc = 0; + + err_open_named_socket: + err_add_tls: + out_no_server: + out_no_change: + free ( server ); + return rc; +} + +/** Encrypted syslog settings applicator */ +struct settings_applicator syslogs_applicator __settings_applicator = { + .apply = apply_syslogs_settings, +}; |