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Diffstat (limited to 'src/vnet/syslog/syslog.h')
| -rw-r--r-- | src/vnet/syslog/syslog.h | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/vnet/syslog/syslog.h b/src/vnet/syslog/syslog.h new file mode 100644 index 00000000000..ed915877518 --- /dev/null +++ b/src/vnet/syslog/syslog.h @@ -0,0 +1,225 @@ +/* + * 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 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: + */ |