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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/udp/syslog.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/udp/syslog.c')
-rw-r--r-- | qemu/roms/ipxe/src/net/udp/syslog.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/net/udp/syslog.c b/qemu/roms/ipxe/src/net/udp/syslog.c new file mode 100644 index 000000000..d65d19ab8 --- /dev/null +++ b/qemu/roms/ipxe/src/net/udp/syslog.c @@ -0,0 +1,298 @@ +/* + * Copyright (C) 2011 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 + * + * Syslog protocol + * + */ + +#include <stdint.h> +#include <stdlib.h> +#include <ctype.h> +#include <byteswap.h> +#include <ipxe/xfer.h> +#include <ipxe/open.h> +#include <ipxe/tcpip.h> +#include <ipxe/dhcp.h> +#include <ipxe/dhcpv6.h> +#include <ipxe/settings.h> +#include <ipxe/console.h> +#include <ipxe/lineconsole.h> +#include <ipxe/syslog.h> +#include <config/console.h> + +/* Set default console usage if applicable */ +#if ! ( defined ( CONSOLE_SYSLOG ) && CONSOLE_EXPLICIT ( CONSOLE_SYSLOG ) ) +#undef CONSOLE_SYSLOG +#define CONSOLE_SYSLOG ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_TUI ) +#endif + +/** The syslog server */ +static union { + struct sockaddr sa; + struct sockaddr_tcpip st; + struct sockaddr_in sin; + struct sockaddr_in6 sin6; +} logserver = { + .st = { + .st_port = htons ( SYSLOG_PORT ), + }, +}; + +/** Syslog UDP interface operations */ +static struct interface_operation syslogger_operations[] = {}; + +/** Syslog UDP interface descriptor */ +static struct interface_descriptor syslogger_desc = + INTF_DESC_PURE ( syslogger_operations ); + +/** The syslog UDP interface */ +static struct interface syslogger = INTF_INIT ( syslogger_desc ); + +/****************************************************************************** + * + * Console driver + * + ****************************************************************************** + */ + +/** Host name (for log messages) */ +static char *syslog_hostname; + +/** Domain name (for log messages) */ +static char *syslog_domain; + +/** + * Transmit formatted syslog message + * + * @v xfer Data transfer interface + * @v severity Severity + * @v message Message + * @v terminator Message terminator + * @ret rc Return status code + */ +int syslog_send ( struct interface *xfer, unsigned int severity, + const char *message, const char *terminator ) { + const char *hostname = ( syslog_hostname ? syslog_hostname : "" ); + const char *domain = ( ( hostname[0] && syslog_domain ) ? + syslog_domain : "" ); + + return xfer_printf ( xfer, "<%d>%s%s%s%sipxe: %s%s", + SYSLOG_PRIORITY ( SYSLOG_DEFAULT_FACILITY, + severity ), hostname, + ( domain[0] ? "." : "" ), domain, + ( hostname[0] ? " " : "" ), message, terminator ); +} + +/****************************************************************************** + * + * Console driver + * + ****************************************************************************** + */ + +/** Syslog line buffer */ +static char syslog_buffer[SYSLOG_BUFSIZE]; + +/** Syslog severity */ +static unsigned int syslog_severity = SYSLOG_DEFAULT_SEVERITY; + +/** + * Handle ANSI set syslog priority (private sequence) + * + * @v ctx ANSI escape sequence context + * @v count Parameter count + * @v params List of graphic rendition aspects + */ +static void syslog_handle_priority ( struct ansiesc_context *ctx __unused, + unsigned int count __unused, + int params[] ) { + if ( params[0] >= 0 ) { + syslog_severity = params[0]; + } else { + syslog_severity = SYSLOG_DEFAULT_SEVERITY; + } +} + +/** Syslog ANSI escape sequence handlers */ +static struct ansiesc_handler syslog_handlers[] = { + { ANSIESC_LOG_PRIORITY, syslog_handle_priority }, + { 0, NULL } +}; + +/** Syslog line console */ +static struct line_console syslog_line = { + .buffer = syslog_buffer, + .len = sizeof ( syslog_buffer ), + .ctx = { + .handlers = syslog_handlers, + }, +}; + +/** Syslog recursion marker */ +static int syslog_entered; + +/** + * Print a character to syslog console + * + * @v character Character to be printed + */ +static void syslog_putchar ( int character ) { + int rc; + + /* Ignore if we are already mid-logging */ + if ( syslog_entered ) + return; + + /* Fill line buffer */ + if ( line_putchar ( &syslog_line, character ) == 0 ) + return; + + /* Guard against re-entry */ + syslog_entered = 1; + + /* Send log message */ + if ( ( rc = syslog_send ( &syslogger, syslog_severity, + syslog_buffer, "" ) ) != 0 ) { + DBG ( "SYSLOG could not send log message: %s\n", + strerror ( rc ) ); + } + + /* Clear re-entry flag */ + syslog_entered = 0; +} + +/** Syslog console driver */ +struct console_driver syslog_console __console_driver = { + .putchar = syslog_putchar, + .disabled = CONSOLE_DISABLED, + .usage = CONSOLE_SYSLOG, +}; + +/****************************************************************************** + * + * Settings + * + ****************************************************************************** + */ + +/** IPv4 syslog server setting */ +const struct setting syslog_setting __setting ( SETTING_MISC, syslog ) = { + .name = "syslog", + .description = "Syslog server", + .tag = DHCP_LOG_SERVERS, + .type = &setting_type_ipv4, +}; + +/** IPv6 syslog server setting */ +const struct setting syslog6_setting __setting ( SETTING_MISC, syslog6 ) = { + .name = "syslog6", + .description = "Syslog server", + .tag = DHCPV6_LOG_SERVERS, + .type = &setting_type_ipv6, + .scope = &ipv6_scope, +}; + +/** + * Strip invalid characters from host/domain name + * + * @v name Name to strip + */ +static void syslog_fix_name ( char *name ) { + char *fixed = name; + int c; + + /* Do nothing if name does not exist */ + if ( ! name ) + return; + + /* Strip any non-printable or whitespace characters from the name */ + do { + c = *(name++); + *fixed = c; + if ( isprint ( c ) && ! isspace ( c ) ) + fixed++; + } while ( c ); +} + +/** + * Apply syslog settings + * + * @ret rc Return status code + */ +static int apply_syslog_settings ( void ) { + struct sockaddr old_logserver; + int rc; + + /* Fetch hostname and domain name */ + free ( syslog_hostname ); + fetch_string_setting_copy ( NULL, &hostname_setting, &syslog_hostname ); + syslog_fix_name ( syslog_hostname ); + free ( syslog_domain ); + fetch_string_setting_copy ( NULL, &domain_setting, &syslog_domain ); + syslog_fix_name ( syslog_domain ); + + /* Fetch log server */ + syslog_console.disabled = CONSOLE_DISABLED; + memcpy ( &old_logserver, &logserver, sizeof ( old_logserver ) ); + logserver.sa.sa_family = 0; + if ( fetch_ipv6_setting ( NULL, &syslog6_setting, + &logserver.sin6.sin6_addr ) >= 0 ) { + logserver.sin6.sin6_family = AF_INET6; + } else if ( fetch_ipv4_setting ( NULL, &syslog_setting, + &logserver.sin.sin_addr ) >= 0 ) { + logserver.sin.sin_family = AF_INET; + } + if ( logserver.sa.sa_family ) { + syslog_console.disabled = 0; + DBG ( "SYSLOG using log server %s\n", + sock_ntoa ( &logserver.sa ) ); + } + + /* Do nothing unless log server has changed */ + if ( memcmp ( &logserver, &old_logserver, sizeof ( logserver ) ) == 0 ) + return 0; + + /* Reset syslog connection */ + intf_restart ( &syslogger, 0 ); + + /* Do nothing unless we have a log server */ + if ( syslog_console.disabled ) { + DBG ( "SYSLOG has no log server\n" ); + return 0; + } + + /* Connect to log server */ + if ( ( rc = xfer_open_socket ( &syslogger, SOCK_DGRAM, + &logserver.sa, NULL ) ) != 0 ) { + DBG ( "SYSLOG cannot connect to log server: %s\n", + strerror ( rc ) ); + return rc; + } + + return 0; +} + +/** Syslog settings applicator */ +struct settings_applicator syslog_applicator __settings_applicator = { + .apply = apply_syslog_settings, +}; |