babeld: Add BABEL_ERR_XXX error messages.

Add some BABEL_ERR_XXX error messages and convert over to using
zlog_ferr instead of zlog_err.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

babeld/babel_errors.c

@@ -0,0 +1,42 @@
+/*
+ * babel_errors - code for error messages that may occur in the
+ *              babel process
+ * Copyright (C) 2018 Cumulus Networks, Inc.
+ *               Donald Sharp
+ *
+ * FRR 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, or (at your option) any
+ * later version.
+ *
+ * FRR 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; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <zebra.h>
+
+#include "babel_errors.h"
+
+static struct ferr_ref ferr_babel_err[] = {
+	{
+		.code = BABEL_ERR_MEMORY,
+		.title = "BABEL Memory Errors",
+		.description = "Babel has failed to allocate memory, the system is about to run out of memory",
+		.suggestion = "Find the process that is causing memory shortages and remediate that process\nRestart FRR"
+	},
+	{
+		.code = END_FERR,
+	}
+};
+
+void babel_error_init(void)
+{
+	ferr_ref_init();
+
+	ferr_ref_add(ferr_babel_err);
+}

babeld/babel_errors.h

@@ -0,0 +1,32 @@
+/*
+ * babel_errors - header for error messages that may occur in the babel process
+ * Copyright (C) 2018 Cumulus Networks, Inc.
+ *               Donald Sharp
+ *
+ * FRR 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, or (at your option) any
+ * later version.
+ *
+ * FRR 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; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef __BABEL_ERRORS_H__
+#define __BABEL_ERRORS_H__
+
+#include "ferr.h"
+#include "babel_errors.h"
+
+enum babel_ferr_refs {
+	BABEL_ERR_MEMORY = BABEL_FERR_START,
+};
+
+extern void babel_error_init(void);
+
+#endif

babeld/babel_interface.c

@@ -27,6 +27,7 @@ THE SOFTWARE.
 #include "prefix.h"
 #include "vector.h"
 #include "distribute.h"
+#include "lib_errors.h"
 
 #include "babel_main.h"
 #include "util.h"
@@ -39,6 +40,7 @@ THE SOFTWARE.
 #include "route.h"
 #include "xroute.h"
 #include "babel_memory.h"
+#include "babel_errors.h"
 
 #define IS_ENABLE(ifp) (babel_enable_if_lookup(ifp->name) >= 0)
 
@@ -167,7 +169,7 @@ babel_interface_address_add (int cmd, struct zclient *client,
         if (babel_ifp->ipv4 == NULL) {
             babel_ifp->ipv4 = malloc(4);
             if (babel_ifp->ipv4 == NULL) {
-                zlog_err("not einough memory");
+                zlog_ferr(BABEL_ERR_MEMORY, "not enough memory");
             } else {
                 memcpy(babel_ifp->ipv4, &prefix->u.prefix4, 4);
             }
@@ -707,7 +709,7 @@ interface_recalculate(struct interface *ifp)
     tmp = babel_ifp->sendbuf;
     babel_ifp->sendbuf = realloc(babel_ifp->sendbuf, babel_ifp->bufsize);
     if(babel_ifp->sendbuf == NULL) {
-        zlog_err("Couldn't reallocate sendbuf.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't reallocate sendbuf.");
         free(tmp);
         babel_ifp->bufsize = 0;
         return -1;
@@ -727,8 +729,9 @@ interface_recalculate(struct interface *ifp)
     rc = setsockopt(protocol_socket, IPPROTO_IPV6, IPV6_JOIN_GROUP,
                     (char*)&mreq, sizeof(mreq));
     if(rc < 0) {
-        zlog_err("setsockopt(IPV6_JOIN_GROUP) on interface '%s': %s",
+        zlog_ferr(LIB_ERR_SOCKET,
-                 ifp->name, safe_strerror(errno));
+		  "setsockopt(IPV6_JOIN_GROUP) on interface '%s': %s",
+                  ifp->name, safe_strerror(errno));
         /* This is probably due to a missing link-local address,
          so down this interface, and wait until the main loop
          tries to up it again. */
@@ -790,8 +793,9 @@ interface_reset(struct interface *ifp)
         rc = setsockopt(protocol_socket, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
                         (char*)&mreq, sizeof(mreq));
         if(rc < 0)
-            zlog_err("setsockopt(IPV6_LEAVE_GROUP) on interface '%s': %s",
+            zlog_ferr(LIB_ERR_SOCKET,
-                     ifp->name, safe_strerror(errno));
+		      "setsockopt(IPV6_LEAVE_GROUP) on interface '%s': %s",
+                      ifp->name, safe_strerror(errno));
     }
 
     update_interface_metric(ifp);
@@ -1056,7 +1060,7 @@ DEFUN (show_babel_route,
         }
         route_stream_done(routes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     xroutes = xroute_stream();
     if(xroutes) {
@@ -1068,7 +1072,7 @@ DEFUN (show_babel_route,
         }
         xroute_stream_done(xroutes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     return CMD_SUCCESS;
 }
@@ -1103,7 +1107,7 @@ DEFUN (show_babel_route_prefix,
         }
         route_stream_done(routes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     xroutes = xroute_stream();
     if(xroutes) {
@@ -1115,7 +1119,7 @@ DEFUN (show_babel_route_prefix,
         }
         xroute_stream_done(xroutes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     return CMD_SUCCESS;
 }
@@ -1161,7 +1165,7 @@ DEFUN (show_babel_route_addr,
         }
         route_stream_done(routes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     xroutes = xroute_stream();
     if(xroutes) {
@@ -1173,7 +1177,7 @@ DEFUN (show_babel_route_addr,
         }
         xroute_stream_done(xroutes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     return CMD_SUCCESS;
 }
@@ -1220,7 +1224,7 @@ DEFUN (show_babel_route_addr6,
         }
         route_stream_done(routes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     xroutes = xroute_stream();
     if(xroutes) {
@@ -1232,7 +1236,7 @@ DEFUN (show_babel_route_addr6,
         }
         xroute_stream_done(xroutes);
     } else {
-        zlog_err("Couldn't allocate route stream.");
+        zlog_ferr(BABEL_ERR_MEMORY, "Couldn't allocate route stream.");
     }
     return CMD_SUCCESS;
 }

babeld/babel_main.c

@@ -33,6 +33,7 @@ THE SOFTWARE.
 #include "vty.h"
 #include "memory.h"
 #include "libfrr.h"
+#include "lib_errors.h"
 
 #include "babel_main.h"
 #include "babeld.h"
@@ -45,6 +46,7 @@ THE SOFTWARE.
 #include "message.h"
 #include "resend.h"
 #include "babel_zebra.h"
+#include "babel_errors.h"
 
 static void babel_fail(void);
 static void babel_init_random(void);
@@ -151,7 +153,7 @@ main(int argc, char **argv)
 
     frr_preinit (&babeld_di, argc, argv);
     frr_opt_add ("", longopts, "");
-  
+
     babel_init_random();
 
     /* set the Babel's default link-local multicast address and Babel's port */
@@ -181,6 +183,7 @@ main(int argc, char **argv)
     master = frr_init ();
 
     /* Library inits. */
+    babel_error_init();
     zprivs_init (&babeld_privs);
     cmd_init (1);
     vty_init (master);
@@ -225,7 +228,8 @@ babel_init_random(void)
 
     rc = read_random_bytes(&seed, sizeof(seed));
     if(rc < 0) {
-        zlog_err("read(random): %s", safe_strerror(errno));
+        zlog_ferr(LIB_ERR_SYSTEM_CALL, "read(random): %s",
+		  safe_strerror(errno));
         seed = 42;
     }
 
@@ -245,13 +249,14 @@ babel_replace_by_null(int fd)
 
     fd_null = open("/dev/null", O_RDONLY);
     if(fd_null < 0) {
-        zlog_err("open(null): %s", safe_strerror(errno));
+        zlog_ferr(LIB_ERR_SYSTEM_CALL, "open(null): %s", safe_strerror(errno));
         exit(1);
     }
 
     rc = dup2(fd_null, fd);
     if(rc < 0) {
-        zlog_err("dup2(null, 0): %s", safe_strerror(errno));
+        zlog_ferr(LIB_ERR_SYSTEM_CALL, "dup2(null, 0): %s",
+		  safe_strerror(errno));
         exit(1);
     }
 
@@ -270,10 +275,12 @@ babel_load_state_file(void)
 
     fd = open(state_file, O_RDONLY);
     if(fd < 0 && errno != ENOENT)
-        zlog_err("open(babel-state: %s)", safe_strerror(errno));
+        zlog_ferr(LIB_ERR_SYSTEM_CALL, "open(babel-state: %s)",
+		  safe_strerror(errno));
     rc = unlink(state_file);
     if(fd >= 0 && rc < 0) {
-        zlog_err("unlink(babel-state): %s", safe_strerror(errno));
+        zlog_ferr(LIB_ERR_SYSTEM_CALL, "unlink(babel-state): %s",
+		  safe_strerror(errno));
         /* If we couldn't unlink it, it's probably stale. */
         goto fini;
     }
@@ -284,7 +291,8 @@ babel_load_state_file(void)
         long t;
         rc = read(fd, buf, 99);
         if(rc < 0) {
-            zlog_err("read(babel-state): %s", safe_strerror(errno));
+            zlog_ferr(LIB_ERR_SYSTEM_CALL, "read(babel-state): %s",
+		      safe_strerror(errno));
         } else {
             buf[rc] = '\0';
             rc = sscanf(buf, "%99s %d %ld\n", buf2, &s, &t);
@@ -347,7 +355,8 @@ babel_save_state_file(void)
     debugf(BABEL_DEBUG_COMMON, "Save state file.");
     fd = open(state_file, O_WRONLY | O_TRUNC | O_CREAT, 0644);
     if(fd < 0) {
-        zlog_err("creat(babel-state): %s", safe_strerror(errno));
+        zlog_ferr(LIB_ERR_SYSTEM_CALL, "creat(babel-state): %s",
+		  safe_strerror(errno));
         unlink(state_file);
     } else {
         struct timeval realnow;

babeld/babeld.c

@@ -29,6 +29,7 @@ THE SOFTWARE.
 #include "prefix.h"
 #include "filter.h"
 #include "plist.h"
+#include "lib_errors.h"
 
 #include "babel_main.h"
 #include "babeld.h"
@@ -43,6 +44,7 @@ THE SOFTWARE.
 #include "babel_filter.h"
 #include "babel_zebra.h"
 #include "babel_memory.h"
+#include "babel_errors.h"
 
 static int babel_init_routing_process(struct thread *thread);
 static void babel_get_myid(void);
@@ -143,7 +145,8 @@ babel_create_routing_process (void)
     /* Make socket for Babel protocol. */
     protocol_socket = babel_socket(protocol_port);
     if (protocol_socket < 0) {
-        zlog_err("Couldn't create link local socket: %s", safe_strerror(errno));
+        zlog_ferr(LIB_ERR_SOCKET, "Couldn't create link local socket: %s",
+		  safe_strerror(errno));
         goto fail;
     }
 
@@ -176,7 +179,7 @@ babel_read_protocol (struct thread *thread)
                     (struct sockaddr*)&sin6, sizeof(sin6));
     if(rc < 0) {
         if(errno != EAGAIN && errno != EINTR) {
-            zlog_err("recv: %s", safe_strerror(errno));
+            zlog_ferr(LIB_ERR_SOCKET, "recv: %s", safe_strerror(errno));
         }
     } else {
         FOR_ALL_INTERFACES(vrf, ifp) {
@@ -514,7 +517,8 @@ resize_receive_buffer(int size)
     if(receive_buffer == NULL) {
         receive_buffer = malloc(size);
         if(receive_buffer == NULL) {
-            zlog_err("malloc(receive_buffer): %s", safe_strerror(errno));
+            zlog_ferr(BABEL_ERR_MEMORY, "malloc(receive_buffer): %s",
+		      safe_strerror(errno));
             return -1;
         }
         receive_buffer_size = size;
@@ -522,7 +526,8 @@ resize_receive_buffer(int size)
         unsigned char *new;
         new = realloc(receive_buffer, size);
         if(new == NULL) {
-            zlog_err("realloc(receive_buffer): %s", safe_strerror(errno));
+            zlog_ferr(BABEL_ERR_MEMORY, "realloc(receive_buffer): %s",
+		      safe_strerror(errno));
             return -1;
         }
         receive_buffer = new;

babeld/subdir.am

@@ -9,6 +9,7 @@ dist_examples_DATA += babeld/babeld.conf.sample
 endif
 
 babeld_libbabel_a_SOURCES = \
+	babeld/babel_errors.c \
 	babeld/babel_filter.c \
 	babeld/babel_interface.c \
 	babeld/babel_memory.c \
@@ -26,6 +27,7 @@ babeld_libbabel_a_SOURCES = \
 	# end
 
 noinst_HEADERS += \
+	babeld/babel_errors.h \
 	babeld/babel_filter.h \
 	babeld/babel_interface.h \
 	babeld/babel_main.h \