Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 679 insertions, 0 deletions

diff --git a/lib/log.c b/lib/log.c
new file mode 100644
index 0000000..ac31faa
--- /dev/null
+++ b/lib/log.c
@@ -0,0 +1,679 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Logging of zebra
+ * Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro
+ */
+
+#define FRR_DEFINE_DESC_TABLE
+
+#include <zebra.h>
+
+#include "zclient.h"
+#include "log.h"
+#include "memory.h"
+#include "command.h"
+#include "lib_errors.h"
+#include "lib/hook.h"
+#include "printfrr.h"
+#include "frr_pthread.h"
+
+#ifdef HAVE_LIBUNWIND
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#include <dlfcn.h>
+#endif
+
+/**
+ * Looks up a message in a message list by key.
+ *
+ * If the message is not found, returns the provided error message.
+ *
+ * Terminates when it hits a struct message that's all zeros.
+ *
+ * @param mz the message list
+ * @param kz the message key
+ * @param nf the message to return if not found
+ * @return the message
+ */
+const char *lookup_msg(const struct message *mz, int kz, const char *nf)
+{
+	static struct message nt = {0};
+	const char *rz = nf ? nf : "(no message found)";
+	const struct message *pnt;
+	for (pnt = mz; memcmp(pnt, &nt, sizeof(struct message)); pnt++)
+		if (pnt->key == kz) {
+			rz = pnt->str ? pnt->str : rz;
+			break;
+		}
+	return rz;
+}
+
+/* For time string format. */
+size_t frr_timestamp(int timestamp_precision, char *buf, size_t buflen)
+{
+	static struct {
+		time_t last;
+		size_t len;
+		char buf[28];
+	} cache;
+	struct timeval clock;
+
+	gettimeofday(&clock, NULL);
+
+	/* first, we update the cache if the time has changed */
+	if (cache.last != clock.tv_sec) {
+		struct tm tm;
+		cache.last = clock.tv_sec;
+		localtime_r(&cache.last, &tm);
+		cache.len = strftime(cache.buf, sizeof(cache.buf),
+				     "%Y/%m/%d %H:%M:%S", &tm);
+	}
+	/* note: it's not worth caching the subsecond part, because
+	   chances are that back-to-back calls are not sufficiently close
+	   together
+	   for the clock not to have ticked forward */
+
+	if (buflen > cache.len) {
+		memcpy(buf, cache.buf, cache.len);
+		if ((timestamp_precision > 0)
+		    && (buflen > cache.len + 1 + timestamp_precision)) {
+			/* should we worry about locale issues? */
+			static const int divisor[] = {0,   100000, 10000, 1000,
+						      100, 10,     1};
+			int prec;
+			char *p = buf + cache.len + 1
+				  + (prec = timestamp_precision);
+			*p-- = '\0';
+			while (prec > 6)
+			/* this is unlikely to happen, but protect anyway */
+			{
+				*p-- = '0';
+				prec--;
+			}
+			clock.tv_usec /= divisor[prec];
+			do {
+				*p-- = '0' + (clock.tv_usec % 10);
+				clock.tv_usec /= 10;
+			} while (--prec > 0);
+			*p = '.';
+			return cache.len + 1 + timestamp_precision;
+		}
+		buf[cache.len] = '\0';
+		return cache.len;
+	}
+	if (buflen > 0)
+		buf[0] = '\0';
+	return 0;
+}
+
+/*
+ * crash handling
+ *
+ * NB: only AS-Safe (async-signal) functions can be used here!
+ */
+
+/* Note: the goal here is to use only async-signal-safe functions. */
+void zlog_signal(int signo, const char *action, void *siginfo_v,
+		 void *program_counter)
+{
+	siginfo_t *siginfo = siginfo_v;
+	time_t now;
+	char buf[sizeof("DEFAULT: Received signal S at T (si_addr 0xP, PC 0xP); aborting...")
+		 + 100];
+	struct fbuf fb = { .buf = buf, .pos = buf, .len = sizeof(buf) };
+
+	time(&now);
+
+	bprintfrr(&fb, "Received signal %d at %lld", signo, (long long)now);
+	if (program_counter)
+		bprintfrr(&fb, " (si_addr 0x%tx, PC 0x%tx)",
+			  (ptrdiff_t)siginfo->si_addr,
+			  (ptrdiff_t)program_counter);
+	else
+		bprintfrr(&fb, " (si_addr 0x%tx)",
+			  (ptrdiff_t)siginfo->si_addr);
+	bprintfrr(&fb, "; %s\n", action);
+
+	zlog_sigsafe(fb.buf, fb.pos - fb.buf);
+
+	zlog_backtrace_sigsafe(LOG_CRIT, program_counter);
+
+	fb.pos = buf;
+
+	struct event *tc;
+	tc = pthread_getspecific(thread_current);
+
+	if (!tc)
+		bprintfrr(&fb, "no thread information available\n");
+	else
+		bprintfrr(&fb, "in thread %s scheduled from %s:%d %s()\n",
+			  tc->xref->funcname, tc->xref->xref.file,
+			  tc->xref->xref.line, tc->xref->xref.func);
+
+	zlog_sigsafe(fb.buf, fb.pos - fb.buf);
+}
+
+/* Log a backtrace using only async-signal-safe functions.
+   Needs to be enhanced to support syslog logging. */
+void zlog_backtrace_sigsafe(int priority, void *program_counter)
+{
+#ifdef HAVE_LIBUNWIND
+	char buf[256];
+	struct fbuf fb = { .buf = buf, .len = sizeof(buf) };
+	unw_cursor_t cursor;
+	unw_context_t uc;
+	unw_word_t ip, off, sp;
+	Dl_info dlinfo;
+
+	memset(&uc, 0, sizeof(uc));
+	memset(&cursor, 0, sizeof(cursor));
+
+	unw_getcontext(&uc);
+	unw_init_local(&cursor, &uc);
+	while (unw_step(&cursor) > 0) {
+		char name[128] = "?";
+
+		unw_get_reg(&cursor, UNW_REG_IP, &ip);
+		unw_get_reg(&cursor, UNW_REG_SP, &sp);
+
+		if (!unw_get_proc_name(&cursor, buf, sizeof(buf), &off))
+			snprintfrr(name, sizeof(name), "%s+%#lx",
+				   buf, (long)off);
+
+		fb.pos = buf;
+		if (unw_is_signal_frame(&cursor))
+			bprintfrr(&fb, "    ---- signal ----\n");
+		bprintfrr(&fb, "%-30s %16lx %16lx", name, (long)ip, (long)sp);
+		if (dladdr((void *)ip, &dlinfo))
+			bprintfrr(&fb, " %s (mapped at %p)",
+				  dlinfo.dli_fname, dlinfo.dli_fbase);
+		bprintfrr(&fb, "\n");
+		zlog_sigsafe(fb.buf, fb.pos - fb.buf);
+	}
+#elif defined(HAVE_GLIBC_BACKTRACE)
+	void *array[64];
+	int size, i;
+	char buf[128];
+	struct fbuf fb = { .buf = buf, .pos = buf, .len = sizeof(buf) };
+	char **bt = NULL;
+
+	size = backtrace(array, array_size(array));
+	if (size <= 0 || (size_t)size > array_size(array))
+		return;
+
+	bprintfrr(&fb, "Backtrace for %d stack frames:", size);
+	zlog_sigsafe(fb.pos, fb.buf - fb.pos);
+
+	bt = backtrace_symbols(array, size);
+
+	for (i = 0; i < size; i++) {
+		fb.pos = buf;
+		if (bt)
+			bprintfrr(&fb, "%s", bt[i]);
+		else
+			bprintfrr(&fb, "[bt %d] 0x%tx", i,
+				  (ptrdiff_t)(array[i]));
+		zlog_sigsafe(fb.buf, fb.pos - fb.buf);
+	}
+	if (bt)
+		free(bt);
+#endif /* HAVE_STRACK_TRACE */
+}
+
+void zlog_backtrace(int priority)
+{
+#ifdef HAVE_LIBUNWIND
+	char buf[100];
+	unw_cursor_t cursor = {};
+	unw_context_t uc;
+	unw_word_t ip, off, sp;
+	Dl_info dlinfo;
+
+	unw_getcontext(&uc);
+	unw_init_local(&cursor, &uc);
+	zlog(priority, "Backtrace:");
+	while (unw_step(&cursor) > 0) {
+		char name[128] = "?";
+
+		unw_get_reg(&cursor, UNW_REG_IP, &ip);
+		unw_get_reg(&cursor, UNW_REG_SP, &sp);
+
+		if (unw_is_signal_frame(&cursor))
+			zlog(priority, "    ---- signal ----");
+
+		if (!unw_get_proc_name(&cursor, buf, sizeof(buf), &off))
+			snprintf(name, sizeof(name), "%s+%#lx",
+				buf, (long)off);
+
+		if (dladdr((void *)ip, &dlinfo))
+			zlog(priority, "%-30s %16lx %16lx %s (mapped at %p)",
+				name, (long)ip, (long)sp,
+				dlinfo.dli_fname, dlinfo.dli_fbase);
+		else
+			zlog(priority, "%-30s %16lx %16lx",
+				name, (long)ip, (long)sp);
+	}
+#elif defined(HAVE_GLIBC_BACKTRACE)
+	void *array[20];
+	int size, i;
+	char **strings;
+
+	size = backtrace(array, array_size(array));
+	if (size <= 0 || (size_t)size > array_size(array)) {
+		flog_err_sys(
+			EC_LIB_SYSTEM_CALL,
+			"Cannot get backtrace, returned invalid # of frames %d (valid range is between 1 and %lu)",
+			size, (unsigned long)(array_size(array)));
+		return;
+	}
+	zlog(priority, "Backtrace for %d stack frames:", size);
+	if (!(strings = backtrace_symbols(array, size))) {
+		flog_err_sys(EC_LIB_SYSTEM_CALL,
+			     "Cannot get backtrace symbols (out of memory?)");
+		for (i = 0; i < size; i++)
+			zlog(priority, "[bt %d] %p", i, array[i]);
+	} else {
+		for (i = 0; i < size; i++)
+			zlog(priority, "[bt %d] %s", i, strings[i]);
+		free(strings);
+	}
+#else /* !HAVE_GLIBC_BACKTRACE && !HAVE_LIBUNWIND */
+	zlog(priority, "No backtrace available on this platform.");
+#endif
+}
+
+void zlog_thread_info(int log_level)
+{
+	struct event *tc;
+	tc = pthread_getspecific(thread_current);
+
+	if (tc)
+		zlog(log_level,
+		     "Current thread function %s, scheduled from file %s, line %u in %s()",
+		     tc->xref->funcname, tc->xref->xref.file,
+		     tc->xref->xref.line, tc->xref->xref.func);
+	else
+		zlog(log_level, "Current thread not known/applicable");
+}
+
+void memory_oom(size_t size, const char *name)
+{
+	zlog(LOG_CRIT,
+	     "out of memory: failed to allocate %zu bytes for %s object",
+	     size, name);
+	zlog_backtrace(LOG_CRIT);
+	log_memstats(stderr, "log");
+	abort();
+}
+
+/* Wrapper around strerror to handle case where it returns NULL. */
+const char *safe_strerror(int errnum)
+{
+	const char *s = strerror(errnum);
+	return (s != NULL) ? s : "Unknown error";
+}
+
+#define DESC_ENTRY(T) [(T)] = { (T), (#T), '\0' }
+static const struct zebra_desc_table command_types[] = {
+	DESC_ENTRY(ZEBRA_INTERFACE_ADD),
+	DESC_ENTRY(ZEBRA_INTERFACE_DELETE),
+	DESC_ENTRY(ZEBRA_INTERFACE_ADDRESS_ADD),
+	DESC_ENTRY(ZEBRA_INTERFACE_ADDRESS_DELETE),
+	DESC_ENTRY(ZEBRA_INTERFACE_UP),
+	DESC_ENTRY(ZEBRA_INTERFACE_DOWN),
+	DESC_ENTRY(ZEBRA_INTERFACE_SET_MASTER),
+	DESC_ENTRY(ZEBRA_INTERFACE_SET_PROTODOWN),
+	DESC_ENTRY(ZEBRA_ROUTE_ADD),
+	DESC_ENTRY(ZEBRA_ROUTE_DELETE),
+	DESC_ENTRY(ZEBRA_ROUTE_NOTIFY_OWNER),
+	DESC_ENTRY(ZEBRA_REDISTRIBUTE_ADD),
+	DESC_ENTRY(ZEBRA_REDISTRIBUTE_DELETE),
+	DESC_ENTRY(ZEBRA_REDISTRIBUTE_DEFAULT_ADD),
+	DESC_ENTRY(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE),
+	DESC_ENTRY(ZEBRA_ROUTER_ID_ADD),
+	DESC_ENTRY(ZEBRA_ROUTER_ID_DELETE),
+	DESC_ENTRY(ZEBRA_ROUTER_ID_UPDATE),
+	DESC_ENTRY(ZEBRA_HELLO),
+	DESC_ENTRY(ZEBRA_CAPABILITIES),
+	DESC_ENTRY(ZEBRA_NEXTHOP_REGISTER),
+	DESC_ENTRY(ZEBRA_NEXTHOP_UNREGISTER),
+	DESC_ENTRY(ZEBRA_NEXTHOP_UPDATE),
+	DESC_ENTRY(ZEBRA_INTERFACE_NBR_ADDRESS_ADD),
+	DESC_ENTRY(ZEBRA_INTERFACE_NBR_ADDRESS_DELETE),
+	DESC_ENTRY(ZEBRA_INTERFACE_BFD_DEST_UPDATE),
+	DESC_ENTRY(ZEBRA_BFD_DEST_REGISTER),
+	DESC_ENTRY(ZEBRA_BFD_DEST_DEREGISTER),
+	DESC_ENTRY(ZEBRA_BFD_DEST_UPDATE),
+	DESC_ENTRY(ZEBRA_BFD_DEST_REPLAY),
+	DESC_ENTRY(ZEBRA_REDISTRIBUTE_ROUTE_ADD),
+	DESC_ENTRY(ZEBRA_REDISTRIBUTE_ROUTE_DEL),
+	DESC_ENTRY(ZEBRA_VRF_UNREGISTER),
+	DESC_ENTRY(ZEBRA_VRF_ADD),
+	DESC_ENTRY(ZEBRA_VRF_DELETE),
+	DESC_ENTRY(ZEBRA_VRF_LABEL),
+	DESC_ENTRY(ZEBRA_BFD_CLIENT_REGISTER),
+	DESC_ENTRY(ZEBRA_BFD_CLIENT_DEREGISTER),
+	DESC_ENTRY(ZEBRA_INTERFACE_ENABLE_RADV),
+	DESC_ENTRY(ZEBRA_INTERFACE_DISABLE_RADV),
+	DESC_ENTRY(ZEBRA_NEXTHOP_LOOKUP_MRIB),
+	DESC_ENTRY(ZEBRA_INTERFACE_LINK_PARAMS),
+	DESC_ENTRY(ZEBRA_MPLS_LABELS_ADD),
+	DESC_ENTRY(ZEBRA_MPLS_LABELS_DELETE),
+	DESC_ENTRY(ZEBRA_MPLS_LABELS_REPLACE),
+	DESC_ENTRY(ZEBRA_SR_POLICY_SET),
+	DESC_ENTRY(ZEBRA_SR_POLICY_DELETE),
+	DESC_ENTRY(ZEBRA_SR_POLICY_NOTIFY_STATUS),
+	DESC_ENTRY(ZEBRA_IPMR_ROUTE_STATS),
+	DESC_ENTRY(ZEBRA_LABEL_MANAGER_CONNECT),
+	DESC_ENTRY(ZEBRA_LABEL_MANAGER_CONNECT_ASYNC),
+	DESC_ENTRY(ZEBRA_GET_LABEL_CHUNK),
+	DESC_ENTRY(ZEBRA_RELEASE_LABEL_CHUNK),
+	DESC_ENTRY(ZEBRA_FEC_REGISTER),
+	DESC_ENTRY(ZEBRA_FEC_UNREGISTER),
+	DESC_ENTRY(ZEBRA_FEC_UPDATE),
+	DESC_ENTRY(ZEBRA_ADVERTISE_DEFAULT_GW),
+	DESC_ENTRY(ZEBRA_ADVERTISE_SVI_MACIP),
+	DESC_ENTRY(ZEBRA_ADVERTISE_SUBNET),
+	DESC_ENTRY(ZEBRA_ADVERTISE_ALL_VNI),
+	DESC_ENTRY(ZEBRA_LOCAL_ES_ADD),
+	DESC_ENTRY(ZEBRA_LOCAL_ES_DEL),
+	DESC_ENTRY(ZEBRA_REMOTE_ES_VTEP_ADD),
+	DESC_ENTRY(ZEBRA_REMOTE_ES_VTEP_DEL),
+	DESC_ENTRY(ZEBRA_LOCAL_ES_EVI_ADD),
+	DESC_ENTRY(ZEBRA_LOCAL_ES_EVI_DEL),
+	DESC_ENTRY(ZEBRA_VNI_ADD),
+	DESC_ENTRY(ZEBRA_VNI_DEL),
+	DESC_ENTRY(ZEBRA_L3VNI_ADD),
+	DESC_ENTRY(ZEBRA_L3VNI_DEL),
+	DESC_ENTRY(ZEBRA_REMOTE_VTEP_ADD),
+	DESC_ENTRY(ZEBRA_REMOTE_VTEP_DEL),
+	DESC_ENTRY(ZEBRA_MACIP_ADD),
+	DESC_ENTRY(ZEBRA_MACIP_DEL),
+	DESC_ENTRY(ZEBRA_IP_PREFIX_ROUTE_ADD),
+	DESC_ENTRY(ZEBRA_IP_PREFIX_ROUTE_DEL),
+	DESC_ENTRY(ZEBRA_REMOTE_MACIP_ADD),
+	DESC_ENTRY(ZEBRA_REMOTE_MACIP_DEL),
+	DESC_ENTRY(ZEBRA_DUPLICATE_ADDR_DETECTION),
+	DESC_ENTRY(ZEBRA_PW_ADD),
+	DESC_ENTRY(ZEBRA_PW_DELETE),
+	DESC_ENTRY(ZEBRA_PW_SET),
+	DESC_ENTRY(ZEBRA_PW_UNSET),
+	DESC_ENTRY(ZEBRA_PW_STATUS_UPDATE),
+	DESC_ENTRY(ZEBRA_RULE_ADD),
+	DESC_ENTRY(ZEBRA_RULE_DELETE),
+	DESC_ENTRY(ZEBRA_RULE_NOTIFY_OWNER),
+	DESC_ENTRY(ZEBRA_TABLE_MANAGER_CONNECT),
+	DESC_ENTRY(ZEBRA_GET_TABLE_CHUNK),
+	DESC_ENTRY(ZEBRA_RELEASE_TABLE_CHUNK),
+	DESC_ENTRY(ZEBRA_IPSET_CREATE),
+	DESC_ENTRY(ZEBRA_IPSET_DESTROY),
+	DESC_ENTRY(ZEBRA_IPSET_ENTRY_ADD),
+	DESC_ENTRY(ZEBRA_IPSET_ENTRY_DELETE),
+	DESC_ENTRY(ZEBRA_IPSET_NOTIFY_OWNER),
+	DESC_ENTRY(ZEBRA_IPSET_ENTRY_NOTIFY_OWNER),
+	DESC_ENTRY(ZEBRA_IPTABLE_ADD),
+	DESC_ENTRY(ZEBRA_IPTABLE_DELETE),
+	DESC_ENTRY(ZEBRA_IPTABLE_NOTIFY_OWNER),
+	DESC_ENTRY(ZEBRA_VXLAN_FLOOD_CONTROL),
+	DESC_ENTRY(ZEBRA_VXLAN_SG_ADD),
+	DESC_ENTRY(ZEBRA_VXLAN_SG_DEL),
+	DESC_ENTRY(ZEBRA_VXLAN_SG_REPLAY),
+	DESC_ENTRY(ZEBRA_MLAG_PROCESS_UP),
+	DESC_ENTRY(ZEBRA_MLAG_PROCESS_DOWN),
+	DESC_ENTRY(ZEBRA_MLAG_CLIENT_REGISTER),
+	DESC_ENTRY(ZEBRA_MLAG_CLIENT_UNREGISTER),
+	DESC_ENTRY(ZEBRA_MLAG_FORWARD_MSG),
+	DESC_ENTRY(ZEBRA_NHG_ADD),
+	DESC_ENTRY(ZEBRA_NHG_DEL),
+	DESC_ENTRY(ZEBRA_NHG_NOTIFY_OWNER),
+	DESC_ENTRY(ZEBRA_EVPN_REMOTE_NH_ADD),
+	DESC_ENTRY(ZEBRA_EVPN_REMOTE_NH_DEL),
+	DESC_ENTRY(ZEBRA_SRV6_LOCATOR_ADD),
+	DESC_ENTRY(ZEBRA_SRV6_LOCATOR_DELETE),
+	DESC_ENTRY(ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK),
+	DESC_ENTRY(ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK),
+	DESC_ENTRY(ZEBRA_ERROR),
+	DESC_ENTRY(ZEBRA_CLIENT_CAPABILITIES),
+	DESC_ENTRY(ZEBRA_OPAQUE_MESSAGE),
+	DESC_ENTRY(ZEBRA_OPAQUE_REGISTER),
+	DESC_ENTRY(ZEBRA_OPAQUE_UNREGISTER),
+	DESC_ENTRY(ZEBRA_NEIGH_DISCOVER),
+	DESC_ENTRY(ZEBRA_ROUTE_NOTIFY_REQUEST),
+	DESC_ENTRY(ZEBRA_CLIENT_CLOSE_NOTIFY),
+	DESC_ENTRY(ZEBRA_NHRP_NEIGH_ADDED),
+	DESC_ENTRY(ZEBRA_NHRP_NEIGH_REMOVED),
+	DESC_ENTRY(ZEBRA_NHRP_NEIGH_GET),
+	DESC_ENTRY(ZEBRA_NHRP_NEIGH_REGISTER),
+	DESC_ENTRY(ZEBRA_NHRP_NEIGH_UNREGISTER),
+	DESC_ENTRY(ZEBRA_NEIGH_IP_ADD),
+	DESC_ENTRY(ZEBRA_NEIGH_IP_DEL),
+	DESC_ENTRY(ZEBRA_CONFIGURE_ARP),
+	DESC_ENTRY(ZEBRA_GRE_GET),
+	DESC_ENTRY(ZEBRA_GRE_UPDATE),
+	DESC_ENTRY(ZEBRA_GRE_SOURCE_SET),
+	DESC_ENTRY(ZEBRA_TC_QDISC_INSTALL),
+	DESC_ENTRY(ZEBRA_TC_QDISC_UNINSTALL),
+	DESC_ENTRY(ZEBRA_TC_CLASS_ADD),
+	DESC_ENTRY(ZEBRA_TC_CLASS_DELETE),
+	DESC_ENTRY(ZEBRA_TC_FILTER_ADD),
+	DESC_ENTRY(ZEBRA_TC_FILTER_DELETE),
+	DESC_ENTRY(ZEBRA_OPAQUE_NOTIFY)
+};
+#undef DESC_ENTRY
+
+static const struct zebra_desc_table unknown = {0, "unknown", '?'};
+
+static const struct zebra_desc_table *zroute_lookup(unsigned int zroute)
+{
+	unsigned int i;
+
+	if (zroute >= array_size(route_types)) {
+		flog_err(EC_LIB_DEVELOPMENT, "unknown zebra route type: %u",
+			 zroute);
+		return &unknown;
+	}
+	if (zroute == route_types[zroute].type)
+		return &route_types[zroute];
+	for (i = 0; i < array_size(route_types); i++) {
+		if (zroute == route_types[i].type) {
+			zlog_warn(
+				"internal error: route type table out of order while searching for %u, please notify developers",
+				zroute);
+			return &route_types[i];
+		}
+	}
+	flog_err(EC_LIB_DEVELOPMENT,
+		 "internal error: cannot find route type %u in table!", zroute);
+	return &unknown;
+}
+
+const char *zebra_route_string(unsigned int zroute)
+{
+	return zroute_lookup(zroute)->string;
+}
+
+char zebra_route_char(unsigned int zroute)
+{
+	return zroute_lookup(zroute)->chr;
+}
+
+const char *zserv_command_string(unsigned int command)
+{
+	if (command >= array_size(command_types)) {
+		flog_err(EC_LIB_DEVELOPMENT, "unknown zserv command type: %u",
+			 command);
+		return unknown.string;
+	}
+	return command_types[command].string;
+}
+
+#define DESC_ENTRY(T) [(T)] = {(T), (#T), '\0'}
+static const struct zebra_desc_table gr_client_cap_types[] = {
+	DESC_ENTRY(ZEBRA_CLIENT_GR_CAPABILITIES),
+	DESC_ENTRY(ZEBRA_CLIENT_ROUTE_UPDATE_COMPLETE),
+	DESC_ENTRY(ZEBRA_CLIENT_ROUTE_UPDATE_PENDING),
+	DESC_ENTRY(ZEBRA_CLIENT_GR_DISABLE),
+	DESC_ENTRY(ZEBRA_CLIENT_RIB_STALE_TIME),
+};
+#undef DESC_ENTRY
+
+const char *zserv_gr_client_cap_string(uint32_t zcc)
+{
+	if (zcc >= array_size(gr_client_cap_types)) {
+		flog_err(EC_LIB_DEVELOPMENT, "unknown zserv command type: %u",
+			 zcc);
+		return unknown.string;
+	}
+	return gr_client_cap_types[zcc].string;
+}
+
+int proto_name2num(const char *s)
+{
+	unsigned i;
+
+	for (i = 0; i < array_size(route_types); ++i)
+		if (strcasecmp(s, route_types[i].string) == 0)
+			return route_types[i].type;
+	return -1;
+}
+
+int proto_redistnum(int afi, const char *s)
+{
+	if (!s)
+		return -1;
+
+	if (afi == AFI_IP) {
+		if (strmatch(s, "kernel"))
+			return ZEBRA_ROUTE_KERNEL;
+		else if (strmatch(s, "connected"))
+			return ZEBRA_ROUTE_CONNECT;
+		else if (strmatch(s, "static"))
+			return ZEBRA_ROUTE_STATIC;
+		else if (strmatch(s, "rip"))
+			return ZEBRA_ROUTE_RIP;
+		else if (strmatch(s, "eigrp"))
+			return ZEBRA_ROUTE_EIGRP;
+		else if (strmatch(s, "ospf"))
+			return ZEBRA_ROUTE_OSPF;
+		else if (strmatch(s, "isis"))
+			return ZEBRA_ROUTE_ISIS;
+		else if (strmatch(s, "bgp"))
+			return ZEBRA_ROUTE_BGP;
+		else if (strmatch(s, "table"))
+			return ZEBRA_ROUTE_TABLE;
+		else if (strmatch(s, "vnc"))
+			return ZEBRA_ROUTE_VNC;
+		else if (strmatch(s, "vnc-direct"))
+			return ZEBRA_ROUTE_VNC_DIRECT;
+		else if (strmatch(s, "nhrp"))
+			return ZEBRA_ROUTE_NHRP;
+		else if (strmatch(s, "babel"))
+			return ZEBRA_ROUTE_BABEL;
+		else if (strmatch(s, "sharp"))
+			return ZEBRA_ROUTE_SHARP;
+		else if (strmatch(s, "openfabric"))
+			return ZEBRA_ROUTE_OPENFABRIC;
+	}
+	if (afi == AFI_IP6) {
+		if (strmatch(s, "kernel"))
+			return ZEBRA_ROUTE_KERNEL;
+		else if (strmatch(s, "connected"))
+			return ZEBRA_ROUTE_CONNECT;
+		else if (strmatch(s, "static"))
+			return ZEBRA_ROUTE_STATIC;
+		else if (strmatch(s, "ripng"))
+			return ZEBRA_ROUTE_RIPNG;
+		else if (strmatch(s, "ospf6"))
+			return ZEBRA_ROUTE_OSPF6;
+		else if (strmatch(s, "isis"))
+			return ZEBRA_ROUTE_ISIS;
+		else if (strmatch(s, "bgp"))
+			return ZEBRA_ROUTE_BGP;
+		else if (strmatch(s, "table"))
+			return ZEBRA_ROUTE_TABLE;
+		else if (strmatch(s, "vnc"))
+			return ZEBRA_ROUTE_VNC;
+		else if (strmatch(s, "vnc-direct"))
+			return ZEBRA_ROUTE_VNC_DIRECT;
+		else if (strmatch(s, "nhrp"))
+			return ZEBRA_ROUTE_NHRP;
+		else if (strmatch(s, "babel"))
+			return ZEBRA_ROUTE_BABEL;
+		else if (strmatch(s, "sharp"))
+			return ZEBRA_ROUTE_SHARP;
+		else if (strmatch(s, "openfabric"))
+			return ZEBRA_ROUTE_OPENFABRIC;
+	}
+	return -1;
+}
+
+void zlog_hexdump(const void *mem, size_t len)
+{
+	char line[64];
+	const uint8_t *src = mem;
+	const uint8_t *end = src + len;
+
+	if (len == 0) {
+		zlog_debug("%016lx: (zero length / no data)", (long)src);
+		return;
+	}
+
+	while (src < end) {
+		struct fbuf fb = {
+			.buf = line,
+			.pos = line,
+			.len = sizeof(line),
+		};
+		const uint8_t *lineend = src + 8;
+		unsigned line_bytes = 0;
+
+		bprintfrr(&fb, "%016lx: ", (long)src);
+
+		while (src < lineend && src < end) {
+			bprintfrr(&fb, "%02x ", *src++);
+			line_bytes++;
+		}
+		if (line_bytes < 8)
+			bprintfrr(&fb, "%*s", (8 - line_bytes) * 3, "");
+
+		src -= line_bytes;
+		while (src < lineend && src < end && fb.pos < fb.buf + fb.len) {
+			uint8_t byte = *src++;
+
+			if (isprint(byte))
+				*fb.pos++ = byte;
+			else
+				*fb.pos++ = '.';
+		}
+
+		zlog_debug("%.*s", (int)(fb.pos - fb.buf), fb.buf);
+	}
+}
+
+const char *zlog_sanitize(char *buf, size_t bufsz, const void *in, size_t inlen)
+{
+	const char *inbuf = in;
+	char *pos = buf, *end = buf + bufsz;
+	const char *iend = inbuf + inlen;
+
+	memset(buf, 0, bufsz);
+	for (; inbuf < iend; inbuf++) {
+		/* don't write partial escape sequence */
+		if (end - pos < 5)
+			break;
+
+		if (*inbuf == '\n')
+			snprintf(pos, end - pos, "\\n");
+		else if (*inbuf == '\r')
+			snprintf(pos, end - pos, "\\r");
+		else if (*inbuf == '\t')
+			snprintf(pos, end - pos, "\\t");
+		else if (*inbuf < ' ' || *inbuf == '"' || *inbuf >= 127)
+			snprintf(pos, end - pos, "\\x%02hhx", *inbuf);
+		else
+			*pos = *inbuf;
+
+		pos += strlen(pos);
+	}
+	return buf;
+}