isisd: Add isis_errors and generate custom Error Codes

Generate appropriate error codes for ISIS.

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

isisd/isis_circuit.c

@@ -57,6 +57,7 @@
 #include "isisd/isis_events.h"
 #include "isisd/isis_te.h"
 #include "isisd/isis_mt.h"
+#include "isisd/isis_errors.h"
 
 DEFINE_QOBJ_TYPE(isis_circuit)
 
@@ -566,7 +567,8 @@ int isis_circuit_up(struct isis_circuit *circuit)
 		return ISIS_OK;
 
 	if (circuit->area->lsp_mtu > isis_circuit_pdu_size(circuit)) {
-		zlog_err(
+		zlog_ferr(
+			ISIS_ERR_CONFIG,
 			"Interface MTU %zu on %s is too low to support area lsp mtu %u!",
 			isis_circuit_pdu_size(circuit),
 			circuit->interface->name, circuit->area->lsp_mtu);
@@ -577,7 +579,9 @@ int isis_circuit_up(struct isis_circuit *circuit)
 	if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
 		circuit->circuit_id = isis_circuit_id_gen(isis, circuit->interface);
 		if (!circuit->circuit_id) {
-			zlog_err("There are already 255 broadcast circuits active!");
+			zlog_ferr(
+				ISIS_ERR_CONFIG,
+				"There are already 255 broadcast circuits active!");
 			return ISIS_ERROR;
 		}
 

isisd/isis_csm.c

@@ -47,6 +47,7 @@
 #include "isisd/isisd.h"
 #include "isisd/isis_csm.h"
 #include "isisd/isis_events.h"
+#include "isisd/isis_errors.h"
 
 extern struct isis *isis;
 
@@ -137,10 +138,12 @@ isis_csm_state_change(int event, struct isis_circuit *circuit, void *arg)
 		case IF_UP_FROM_Z:
 			isis_circuit_if_add(circuit, (struct interface *)arg);
 			if (isis_circuit_up(circuit) != ISIS_OK) {
-				zlog_err(
+				zlog_ferr(
+					ISIS_ERR_CONFIG,
 					"Could not bring up %s because of invalid config.",
 					circuit->interface->name);
-				zlog_err(
+				zlog_ferr(
+					ISIS_ERR_CONFIG,
 					"Clearing config for %s. Please re-examine it.",
 					circuit->interface->name);
 				if (circuit->ip_router) {

isisd/isis_errors.c

@@ -0,0 +1,48 @@
+/*
+ * isis_errors - code for error messages that may occur in the
+ *              isis 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 "isis_errors.h"
+
+static struct ferr_ref ferr_isis_err[] = {
+	{
+		.code = ISIS_ERR_PACKET,
+		.title = "ISIS Packet Error",
+		.description = "Isis has detected an error with a packet from a peer",
+		.suggestion = "Gather log information and open an issue then restart FRR"
+	},
+	{
+		.code = ISIS_ERR_CONFIG,
+		.title = "ISIS Configuration Error",
+		.description = "Isis has detected an error within configuration for the router",
+		.suggestion = "Ensure configuration is correct"
+	},
+	{
+		.code = END_FERR,
+	}
+};
+
+void isis_error_init(void)
+{
+	ferr_ref_init();
+
+	ferr_ref_add(ferr_isis_err);
+}

isisd/isis_errors.h

@@ -0,0 +1,33 @@
+/*
+ * isis_errors - header for error messages that may occur in the isis 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 __ISIS_ERRORS_H__
+#define __ISIS_ERRORS_H__
+
+#include "ferr.h"
+#include "isis_errors.h"
+
+enum isis_ferr_refs {
+	ISIS_ERR_PACKET = ISIS_FERR_START,
+	ISIS_ERR_CONFIG,
+};
+
+extern void isis_error_init(void);
+
+#endif

isisd/isis_events.c

@@ -48,6 +48,7 @@
 #include "isisd/isis_csm.h"
 #include "isisd/isis_events.h"
 #include "isisd/isis_spf.h"
+#include "isisd/isis_errors.h"
 
 /* debug isis-spf spf-events
  4w4d: ISIS-Spf (tlt): L2 SPF needed, new adjacency, from 0x609229F4
@@ -156,9 +157,9 @@ void isis_circuit_is_type_set(struct isis_circuit *circuit, int newtype)
 		return; /* No change */
 
 	if (!(newtype & circuit->area->is_type)) {
-		zlog_err(
+		zlog_ferr(
-			"ISIS-Evt (%s) circuit type change - invalid level %s because"
+			ISIS_ERR_CONFIG,
-			" area is %s",
+			"ISIS-Evt (%s) circuit type change - invalid level %s because area is %s",
 			circuit->area->area_tag, circuit_t2string(newtype),
 			circuit_t2string(circuit->area->is_type));
 		return;

isisd/isis_lsp.c

@@ -1244,7 +1244,8 @@ static int lsp_regenerate(struct isis_area *area, int level)
 	lsp = lsp_search(lspid, lspdb);
 
 	if (!lsp) {
-		zlog_err("ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!",
+		zlog_ferr(LIB_ERR_DEVELOPMENT,
+			  "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!",
 			  area->area_tag, level);
 		return ISIS_ERROR;
 	}
@@ -1612,7 +1613,8 @@ static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level)
 	lsp = lsp_search(lsp_id, lspdb);
 
 	if (!lsp) {
-		zlog_err("lsp_regenerate_pseudo: no l%d LSP %s found!", level,
+		zlog_ferr(LIB_ERR_DEVELOPMENT,
+			  "lsp_regenerate_pseudo: no l%d LSP %s found!", level,
 			  rawlspid_print(lsp_id));
 		return ISIS_ERROR;
 	}

isisd/isis_main.c

@@ -53,6 +53,7 @@
 #include "isisd/isis_routemap.h"
 #include "isisd/isis_zebra.h"
 #include "isisd/isis_te.h"
+#include "isisd/isis_errors.h"
 
 /* Default configuration file name */
 #define ISISD_DEFAULT_CONFIG "isisd.conf"
@@ -189,6 +190,7 @@ int main(int argc, char **argv, char **envp)
 	/*
 	 *  initializations
 	 */
+	isis_error_init();
 	access_list_init();
 	vrf_init(NULL, NULL, NULL, NULL);
 	prefix_list_init();

isisd/isis_pdu.c

@@ -55,6 +55,7 @@
 #include "isisd/isis_te.h"
 #include "isisd/isis_mt.h"
 #include "isisd/isis_tlvs.h"
+#include "isisd/isis_errors.h"
 
 static int ack_lsp(struct isis_lsp_hdr *hdr, struct isis_circuit *circuit,
 		   int level)
@@ -87,7 +88,8 @@ static int ack_lsp(struct isis_lsp_hdr *hdr, struct isis_circuit *circuit,
 
 	retval = circuit->tx(circuit, level);
 	if (retval != ISIS_OK)
-		zlog_err("ISIS-Upd (%s): Send L%d LSP PSNP on %s failed",
+		zlog_ferr(ISIS_ERR_PACKET,
+			  "ISIS-Upd (%s): Send L%d LSP PSNP on %s failed",
 			  circuit->area->area_tag, level,
 			  circuit->interface->name);
 
@@ -615,7 +617,8 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit,
 	}
 
 	if (!p2p_hello && !(level & iih.circ_type)) {
-		zlog_err("Level %d LAN Hello with Circuit Type %d", level,
+		zlog_ferr(ISIS_ERR_PACKET,
+			  "Level %d LAN Hello with Circuit Type %d", level,
 			  iih.circ_type);
 		return ISIS_ERROR;
 	}
@@ -1351,7 +1354,7 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa)
 
 	/* Verify that at least the 8 bytes fixed header have been received */
 	if (stream_get_endp(circuit->rcv_stream) < ISIS_FIXED_HDR_LEN) {
-		zlog_err("PDU is too short to be IS-IS.");
+		zlog_ferr(ISIS_ERR_PACKET, "PDU is too short to be IS-IS.");
 		return ISIS_ERROR;
 	}
 
@@ -1372,7 +1375,8 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa)
 	}
 
 	if (idrp != ISO10589_ISIS) {
-		zlog_err("Not an IS-IS packet IDRP=%" PRIx8, idrp);
+		zlog_ferr(ISIS_ERR_PACKET, "Not an IS-IS packet IDRP=%" PRIx8,
+			  idrp);
 		return ISIS_ERROR;
 	}
 
@@ -1382,7 +1386,8 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa)
 	}
 
 	if (id_len != 0 && id_len != ISIS_SYS_ID_LEN) {
-		zlog_err(
+		zlog_ferr(
+			ISIS_ERR_PACKET,
 			"IDFieldLengthMismatch: ID Length field in a received PDU  %" PRIu8
 			", while the parameter for this IS is %u",
 			id_len, ISIS_SYS_ID_LEN);
@@ -1396,14 +1401,16 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa)
 	}
 
 	if (length != expected_length) {
-		zlog_err("Exepected fixed header length = %" PRIu8
+		zlog_ferr(ISIS_ERR_PACKET,
+			  "Exepected fixed header length = %" PRIu8
 			  " but got %" PRIu8,
 			  expected_length, length);
 		return ISIS_ERROR;
 	}
 
 	if (stream_get_endp(circuit->rcv_stream) < length) {
-		zlog_err(
+		zlog_ferr(
+			ISIS_ERR_PACKET,
 			"PDU is too short to contain fixed header of given PDU type.");
 		return ISIS_ERROR;
 	}
@@ -1421,7 +1428,8 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa)
 
 	/* either 3 or 0 */
 	if (max_area_addrs != 0 && max_area_addrs != isis->max_area_addrs) {
-		zlog_err(
+		zlog_ferr(
+			ISIS_ERR_PACKET,
 			"maximumAreaAddressesMismatch: maximumAreaAdresses in a received PDU %" PRIu8
 			" while the parameter for this IS is %u",
 			max_area_addrs, isis->max_area_addrs);
@@ -1645,7 +1653,8 @@ int send_hello(struct isis_circuit *circuit, int level)
 
 	retval = circuit->tx(circuit, level);
 	if (retval != ISIS_OK)
-		zlog_err("ISIS-Adj (%s): Send L%d IIH on %s failed",
+		zlog_ferr(ISIS_ERR_PACKET,
+			  "ISIS-Adj (%s): Send L%d IIH on %s failed",
 			  circuit->area->area_tag, level,
 			  circuit->interface->name);
 
@@ -1842,7 +1851,8 @@ int send_csnp(struct isis_circuit *circuit, int level)
 
 		int retval = circuit->tx(circuit, level);
 		if (retval != ISIS_OK) {
-			zlog_err("ISIS-Snp (%s): Send L%d CSNP on %s failed",
+			zlog_ferr(ISIS_ERR_PACKET,
+				  "ISIS-Snp (%s): Send L%d CSNP on %s failed",
 				  circuit->area->area_tag, level,
 				  circuit->interface->name);
 			isis_free_tlvs(tlvs);
@@ -2006,7 +2016,8 @@ static int send_psnp(int level, struct isis_circuit *circuit)
 
 		int retval = circuit->tx(circuit, level);
 		if (retval != ISIS_OK) {
-			zlog_err("ISIS-Snp (%s): Send L%d PSNP on %s failed",
+			zlog_ferr(ISIS_ERR_PACKET,
+				  "ISIS-Snp (%s): Send L%d PSNP on %s failed",
 				  circuit->area->area_tag, level,
 				  circuit->interface->name);
 			isis_free_tlvs(tlvs);
@@ -2113,7 +2124,8 @@ int send_lsp(struct thread *thread)
 	 * than
 	 * the circuit's MTU. So handle and log this case here. */
 	if (stream_get_endp(lsp->pdu) > stream_get_size(circuit->snd_stream)) {
-		zlog_err(
+		zlog_ferr(
+			ISIS_ERR_PACKET,
 			"ISIS-Upd (%s): Can't send L%d LSP %s, seq 0x%08" PRIx32
 			", cksum 0x%04" PRIx16 ", lifetime %" PRIu16
 			"s on %s. LSP Size is %zu while interface stream size is %zu.",
@@ -2148,7 +2160,8 @@ int send_lsp(struct thread *thread)
 	clear_srm = 0;
 	retval = circuit->tx(circuit, lsp->level);
 	if (retval != ISIS_OK) {
-		zlog_err("ISIS-Upd (%s): Send L%d LSP on %s failed %s",
+		zlog_ferr(ISIS_ERR_PACKET,
+			  "ISIS-Upd (%s): Send L%d LSP on %s failed %s",
 			  circuit->area->area_tag, lsp->level,
 			  circuit->interface->name,
 			  (retval == ISIS_WARNING) ? "temporarily"

isisd/subdir.am

@@ -15,6 +15,7 @@ isisd_libisis_a_SOURCES = \
 	isisd/isis_csm.c \
 	isisd/isis_dr.c \
 	isisd/isis_dynhn.c \
+	isisd/isis_errors.c \
 	isisd/isis_events.c \
 	isisd/isis_flags.c \
 	isisd/isis_lsp.c \
@@ -44,6 +45,7 @@ noinst_HEADERS += \
 	isisd/isis_csm.h \
 	isisd/isis_dr.h \
 	isisd/isis_dynhn.h \
+	isisd/isis_errors.h \
 	isisd/isis_events.h \
 	isisd/isis_flags.h \
 	isisd/isis_lsp.h \