Add RFC5424 syslog protocol support (VPP-1139)

Syslog protocol logging transport event messages across network over UDP
protocol based on RFC5426.

Change-Id: Ica74b40bcc2e6d0fbd41e9bf78e76395fbabab3c
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 243 insertions, 0 deletions

diff --git a/src/vnet/syslog/syslog_api.c b/src/vnet/syslog/syslog_api.c
new file mode 100644
index 00000000000..8f94c72b291
--- /dev/null
+++ b/src/vnet/syslog/syslog_api.c
@@ -0,0 +1,243 @@
+/*
+ * 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.
+ */
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+
+#include <vnet/interface.h>
+#include <vnet/api_errno.h>
+
+#include <vnet/fib/fib_table.h>
+#include <vnet/syslog/syslog.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_vpe_api_msg             \
+_(SYSLOG_SET_SENDER, syslog_set_sender) \
+_(SYSLOG_GET_SENDER, syslog_get_sender) \
+_(SYSLOG_SET_FILTER, syslog_set_filter) \
+_(SYSLOG_GET_FILTER, syslog_get_filter)
+
+static int
+syslog_severity_decode (vl_api_syslog_severity_t v, syslog_severity_t * s)
+{
+  v = ntohl (v);
+  int rv = 0;
+
+  switch (v)
+    {
+    case SYSLOG_API_SEVERITY_EMERG:
+      *s = SYSLOG_SEVERITY_EMERGENCY;
+      break;
+    case SYSLOG_API_SEVERITY_ALERT:
+      *s = SYSLOG_SEVERITY_ALERT;
+      break;
+    case SYSLOG_API_SEVERITY_CRIT:
+      *s = SYSLOG_SEVERITY_CRITICAL;
+      break;
+    case SYSLOG_API_SEVERITY_ERR:
+      *s = SYSLOG_SEVERITY_ERROR;
+      break;
+    case SYSLOG_API_SEVERITY_WARN:
+      *s = SYSLOG_SEVERITY_WARNING;
+      break;
+    case SYSLOG_API_SEVERITY_NOTICE:
+      *s = SYSLOG_SEVERITY_NOTICE;
+      break;
+    case SYSLOG_API_SEVERITY_INFO:
+      *s = SYSLOG_SEVERITY_INFORMATIONAL;
+      break;
+    case SYSLOG_API_SEVERITY_DBG:
+      *s = SYSLOG_SEVERITY_DEBUG;
+      break;
+    default:
+      rv = VNET_API_ERROR_INVALID_VALUE;
+    }
+
+  return rv;
+}
+
+static int
+syslog_severity_encode (syslog_severity_t v, vl_api_syslog_severity_t * s)
+{
+  int rv = 0;
+  switch (v)
+    {
+    case SYSLOG_SEVERITY_EMERGENCY:
+      *s = SYSLOG_API_SEVERITY_EMERG;
+      break;
+    case SYSLOG_SEVERITY_ALERT:
+      *s = SYSLOG_API_SEVERITY_ALERT;
+      break;
+    case SYSLOG_SEVERITY_CRITICAL:
+      *s = SYSLOG_API_SEVERITY_CRIT;
+      break;
+    case SYSLOG_SEVERITY_ERROR:
+      *s = SYSLOG_API_SEVERITY_ERR;
+      break;
+    case SYSLOG_SEVERITY_WARNING:
+      *s = SYSLOG_API_SEVERITY_WARN;
+      break;
+    case SYSLOG_SEVERITY_NOTICE:
+      *s = SYSLOG_API_SEVERITY_NOTICE;
+      break;
+    case SYSLOG_SEVERITY_INFORMATIONAL:
+      *s = SYSLOG_API_SEVERITY_INFO;
+      break;
+    case SYSLOG_SEVERITY_DEBUG:
+      *s = SYSLOG_API_SEVERITY_DBG;
+      break;
+    default:
+      rv = VNET_API_ERROR_INVALID_VALUE;
+    }
+
+  *s = htonl (*s);
+  return rv;
+}
+
+static void
+vl_api_syslog_set_sender_t_handler (vl_api_syslog_set_sender_t * mp)
+{
+  vl_api_syslog_set_sender_reply_t *rmp;
+  ip4_address_t collector, src;
+
+  clib_memcpy (&collector, &mp->collector_address, sizeof (collector));
+  clib_memcpy (&src, &mp->src_address, sizeof (src));
+
+  int rv = set_syslog_sender (&collector, ntohs (mp->collector_port), &src,
+			      ntohl (mp->vrf_id), ntohl (mp->max_msg_size));
+
+  REPLY_MACRO (VL_API_SYSLOG_SET_SENDER_REPLY);
+}
+
+static void
+vl_api_syslog_get_sender_t_handler (vl_api_syslog_get_sender_t * mp)
+{
+  int rv = 0;
+  vl_api_syslog_get_sender_reply_t *rmp;
+  syslog_main_t *sm = &syslog_main;
+  u32 vrf_id;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_SYSLOG_GET_SENDER_REPLY,
+  ({
+    clib_memcpy (rmp->collector_address.address, &(sm->collector),
+                 sizeof(ip4_address_t));
+    clib_memcpy (rmp->src_address.address, &(sm->src_address),
+                 sizeof(ip4_address_t));
+    rmp->collector_port = htons (sm->collector_port);
+    if (sm->fib_index == ~0)
+      vrf_id = ~0;
+    else
+      vrf_id = htonl (fib_table_get_table_id (sm->fib_index, FIB_PROTOCOL_IP4));
+    rmp->vrf_id = vrf_id;
+    rmp->max_msg_size = htonl (sm->max_msg_size);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_syslog_set_filter_t_handler (vl_api_syslog_set_filter_t * mp)
+{
+  vl_api_syslog_set_filter_reply_t *rmp;
+  syslog_main_t *sm = &syslog_main;
+  int rv = 0;
+  syslog_severity_t s;
+
+  rv = syslog_severity_decode (mp->severity, &s);
+  if (rv)
+    goto send_reply;
+
+  sm->severity_filter = s;
+
+send_reply:
+  REPLY_MACRO (VL_API_SYSLOG_SET_FILTER_REPLY);
+}
+
+static void
+vl_api_syslog_get_filter_t_handler (vl_api_syslog_get_filter_t * mp)
+{
+  int rv = 0;
+  vl_api_syslog_get_filter_reply_t *rmp;
+  syslog_main_t *sm = &syslog_main;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_SYSLOG_GET_FILTER_REPLY,
+  ({
+     rv = syslog_severity_encode (sm->severity_filter, &rmp->severity);
+  }))
+  /* *INDENT-ON* */
+}
+
+#define vl_msg_name_crc_list
+#include <vnet/vnet_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+  foreach_vl_msg_name_crc_syslog;
+#undef _
+}
+
+static clib_error_t *
+syslog_api_hookup (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+  foreach_vpe_api_msg;
+#undef _
+
+  /*
+   * Set up the (msg_name, crc, message-id) table
+   */
+  setup_message_id_table (am);
+
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (syslog_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */