/* * Copyright (c) 2018 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file syslog.h * RFC5424 syslog protocol declarations */ #ifndef __included_syslog_h__ #define __included_syslog_h__ #include <vlib/vlib.h> #include <vnet/vnet.h> #include <vnet/ip/ip4_packet.h> /* syslog message facilities */ #define foreach_syslog_facility \ _(0, KERNEL, "kernel") \ _(1, USER_LEVEL, "user-level") \ _(2, MAIL_SYSTEM, "mail-system") \ _(3, SYSTEM_DAEMONS, "system-daemons") \ _(4, SEC_AUTH, "security-authorization") \ _(5, SYSLOGD, "syslogd") \ _(6, LINE_PRINTER, "line-printer") \ _(7, NETWORK_NEWS, "network-news") \ _(8, UUCP, "uucp") \ _(9, CLOCK, "clock-daemon") \ _(11, FTP, "ftp-daemon") \ _(12, NTP, "ntp-subsystem") \ _(13, LOG_AUDIT, "log-audit") \ _(14, LOG_ALERT, "log-alert") \ _(16, LOCAL0, "local0") \ _(17, LOCAL1, "local1") \ _(18, LOCAL2, "local2") \ _(19, LOCAL3, "local3") \ _(20, LOCAL4, "local4") \ _(21, LOCAL5, "local5") \ _(22, LOCAL6, "local6") \ _(23, LOCAL7, "local7") typedef enum { #define _(v, N, s) SYSLOG_FACILITY_##N = v, foreach_syslog_facility #undef _ } syslog_facility_t; /* syslog message severities */ #define foreach_syslog_severity \ _(0, EMERGENCY, "emergency") \ _(1, ALERT, "alert") \ _(2, CRITICAL, "critical") \ _(3, ERROR, "error") \ _(4, WARNING, "warning") \ _(5, NOTICE, "notice") \ _(6, INFORMATIONAL, "informational") \ _(7, DEBUG, "debug") typedef enum { #define _(v, N, s) SYSLOG_SEVERITY_##N = v, foreach_syslog_severity #undef _ } syslog_severity_t; /** syslog header */ typedef struct { /** facility value, part of priority */ syslog_facility_t facility; /** severity value, part of priority */ syslog_severity_t severity; /** message timestamp */ f64 timestamp; /** application that originated the message RFC5424 6.2.5. */ char *app_name; /** identify the type of message RFC5424 6.2.7. */ char *msgid; } syslog_header_t; /** syslog message */ typedef struct { /** header */ syslog_header_t header; /** structured data RFC5424 6.3. */ u8 **structured_data; u32 curr_sd_index; /** free-form message RFC5424 6.4. */ u8 *msg; } syslog_msg_t; typedef struct { /** process ID RFC5424 6.2.6. */ u32 procid; /** time offset */ f64 time_offset; /** IPv4 address of remote host (destination) */ ip4_address_t collector; /** UDP port number of remote host (destination) */ u16 collector_port; /** IPv4 address of sender (source) */ ip4_address_t src_address; /** FIB table index */ u32 fib_index; /** message size limit */ u32 max_msg_size; /** severity filter (specified severity and greater match) */ syslog_severity_t severity_filter; /** ip4-lookup node index */ u32 ip4_lookup_node_index; /** convenience variables */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; } syslog_main_t; extern syslog_main_t syslog_main; /** * @brief Initialize syslog message header * * @param facility facility value * @param severity severity level * @param app_name application that originated message RFC424 6.2.5. (optional) * @param msgid identify the type of message RFC5424 6.2.7. (optional) */ void syslog_msg_init (syslog_msg_t * syslog_msg, syslog_facility_t facility, syslog_severity_t severity, char *app_name, char *msgid); /** * @brief Initialize structured data element * * @param sd_id structured data element name RFC5424 6.3.2. */ void syslog_msg_sd_init (syslog_msg_t * syslog_msg, char *sd_id); /** * @brief Add structured data elemnt parameter name-value pair RFC5424 6.3.3. */ void syslog_msg_add_sd_param (syslog_msg_t * syslog_msg, char *name, char *fmt, ...); /** * @brief Add free-form message RFC5424 6.4. */ void syslog_msg_add_msg (syslog_msg_t * syslog_msg, char *fmt, ...); /** * @brief Send syslog message */ int syslog_msg_send (syslog_msg_t * syslog_msg); /** * @brief Set syslog sender configuration * * @param collector IPv4 address of syslog collector (destination) * @param collector_port UDP port of syslog colector (destination) * @param src IPv4 address of syslog sender (source) * @param vrf_id VRF/FIB table ID * @param max_msg_size maximum message length */ vnet_api_error_t set_syslog_sender (ip4_address_t * collector, u16 collector_port, ip4_address_t * src, u32 vrf_id, u32 max_msg_size); /** * @brief Check if syslog logging is enabled * * @return 1 if syslog logging is enabled, 0 otherwise */ always_inline int syslog_is_enabled (void) { syslog_main_t *sm = &syslog_main; return sm->collector.as_u32 ? 1 : 0; } /** * @brief Severity filter test * * @return 1 if message with specified severity is not selected to be logged */ always_inline int syslog_severity_filter_block (syslog_severity_t s) { syslog_main_t *sm = &syslog_main; return (sm->severity_filter < s); } #endif /* __included_syslog_h__ */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */