bgpd: update routemap scripting example

- Change from "match command <foo>" to "match script <script>"
- Use new scripting API

Signed-off-by: Quentin Young <qlyoung@nvidia.com>

1 files changed, 188 insertions, 0 deletions

diff --git a/bgpd/bgp_script.c b/bgpd/bgp_script.c
new file mode 100644
index 0000000000..c665f2e7c5
--- /dev/null
+++ b/bgpd/bgp_script.c
@@ -0,0 +1,188 @@
+/* BGP scripting foo
+ * Copyright (C) 2020  NVIDIA Corporation
+ * Quentin Young
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 <lua.h>
+
+#include "bgpd.h"
+#include "bgp_script.h"
+#include "bgp_debug.h"
+#include "bgp_aspath.h"
+#include "frratomic.h"
+#include "frrscript.h"
+
+static void lua_pushpeer(lua_State *L, const struct peer *peer)
+{
+	lua_newtable(L);
+	lua_pushinteger(L, peer->as);
+	lua_setfield(L, -2, "remote_as");
+	lua_pushinteger(L, peer->local_as);
+	lua_setfield(L, -2, "local_as");
+	lua_pushinaddr(L, &peer->remote_id);
+	lua_setfield(L, -2, "remote_id");
+	lua_pushinaddr(L, &peer->local_id);
+	lua_setfield(L, -2, "local_id");
+	lua_pushstring(L, lookup_msg(bgp_status_msg, peer->status, NULL));
+	lua_setfield(L, -2, "state");
+	lua_pushstring(L, peer->desc ? peer->desc : "");
+	lua_setfield(L, -2, "description");
+	lua_pushtimet(L, &peer->uptime);
+	lua_setfield(L, -2, "uptime");
+	lua_pushtimet(L, &peer->readtime);
+	lua_setfield(L, -2, "last_readtime");
+	lua_pushtimet(L, &peer->resettime);
+	lua_setfield(L, -2, "last_resettime");
+	lua_pushsockunion(L, peer->su_local);
+	lua_setfield(L, -2, "local_address");
+	lua_pushsockunion(L, peer->su_remote);
+	lua_setfield(L, -2, "remote_address");
+	lua_pushinteger(L, peer->cap);
+	lua_setfield(L, -2, "capabilities");
+	lua_pushinteger(L, peer->flags);
+	lua_setfield(L, -2, "flags");
+	lua_pushstring(L, peer->password ? peer->password : "");
+	lua_setfield(L, -2, "password");
+
+	/* Nested tables here */
+	lua_newtable(L);
+	{
+		lua_newtable(L);
+		{
+			lua_pushinteger(L, peer->holdtime);
+			lua_setfield(L, -2, "hold");
+			lua_pushinteger(L, peer->keepalive);
+			lua_setfield(L, -2, "keepalive");
+			lua_pushinteger(L, peer->connect);
+			lua_setfield(L, -2, "connect");
+			lua_pushinteger(L, peer->routeadv);
+			lua_setfield(L, -2, "route_advertisement");
+		}
+		lua_setfield(L, -2, "configured");
+
+		lua_newtable(L);
+		{
+			lua_pushinteger(L, peer->v_holdtime);
+			lua_setfield(L, -2, "hold");
+			lua_pushinteger(L, peer->v_keepalive);
+			lua_setfield(L, -2, "keepalive");
+			lua_pushinteger(L, peer->v_connect);
+			lua_setfield(L, -2, "connect");
+			lua_pushinteger(L, peer->v_routeadv);
+			lua_setfield(L, -2, "route_advertisement");
+		}
+		lua_setfield(L, -2, "negotiated");
+	}
+	lua_setfield(L, -2, "timers");
+
+	lua_newtable(L);
+	{
+		lua_pushinteger(L, atomic_load_explicit(&peer->open_in,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "open_in");
+		lua_pushinteger(L, atomic_load_explicit(&peer->open_out,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "open_out");
+		lua_pushinteger(L, atomic_load_explicit(&peer->update_in,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "update_in");
+		lua_pushinteger(L, atomic_load_explicit(&peer->update_out,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "update_out");
+		lua_pushinteger(L, atomic_load_explicit(&peer->update_time,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "update_time");
+		lua_pushinteger(L, atomic_load_explicit(&peer->keepalive_in,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "keepalive_in");
+		lua_pushinteger(L, atomic_load_explicit(&peer->keepalive_out,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "keepalive_out");
+		lua_pushinteger(L, atomic_load_explicit(&peer->notify_in,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "notify_in");
+		lua_pushinteger(L, atomic_load_explicit(&peer->notify_out,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "notify_out");
+		lua_pushinteger(L, atomic_load_explicit(&peer->refresh_in,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "refresh_in");
+		lua_pushinteger(L, atomic_load_explicit(&peer->refresh_out,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "refresh_out");
+		lua_pushinteger(L, atomic_load_explicit(&peer->dynamic_cap_in,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "dynamic_cap_in");
+		lua_pushinteger(L, atomic_load_explicit(&peer->dynamic_cap_out,
+							memory_order_relaxed));
+		lua_setfield(L, -2, "dynamic_cap_out");
+		lua_pushinteger(L, peer->established);
+		lua_setfield(L, -2, "times_established");
+		lua_pushinteger(L, peer->dropped);
+		lua_setfield(L, -2, "times_dropped");
+	}
+	lua_setfield(L, -2, "stats");
+}
+
+static void lua_pushattr(lua_State *L, const struct attr *attr)
+{
+	lua_newtable(L);
+	lua_pushinteger(L, attr->med);
+	lua_setfield(L, -2, "metric");
+	lua_pushinteger(L, attr->nh_ifindex);
+	lua_setfield(L, -2, "ifindex");
+	lua_pushstring(L, attr->aspath->str);
+	lua_setfield(L, -2, "aspath");
+	lua_pushinteger(L, attr->local_pref);
+	lua_setfield(L, -2, "localpref");
+}
+
+static void *lua_toattr(lua_State *L, int idx)
+{
+	struct attr *attr = XCALLOC(MTYPE_TMP, sizeof(struct attr));
+
+	lua_getfield(L, -1, "metric");
+	attr->med = lua_tointeger(L, -1);
+	lua_pop(L, 1);
+	lua_getfield(L, -1, "ifindex");
+	attr->nh_ifindex = lua_tointeger(L, -1);
+	lua_pop(L, 1);
+	lua_getfield(L, -1, "aspath");
+	attr->aspath = aspath_str2aspath(lua_tostring(L, -1));
+	lua_pop(L, 1);
+	lua_getfield(L, -1, "localpref");
+	attr->local_pref = lua_tointeger(L, -1);
+	lua_pop(L, 1);
+
+	return attr;
+}
+
+struct frrscript_codec frrscript_codecs_bgpd[] = {
+	{.typename = "peer",
+	 .encoder = (encoder_func)lua_pushpeer,
+	 .decoder = NULL},
+	{.typename = "attr",
+	 .encoder = (encoder_func)lua_pushattr,
+	 .decoder = lua_toattr},
+	{}};
+
+void bgp_script_init(void)
+{
+	frrscript_register_type_codecs(frrscript_codecs_bgpd);
+}