*: add frr_init() infrastructure

Start centralising startup & option parsing into the library.

FRR_DAEMON_INFO is a bit weird, but it will become useful later (e.g.
for killing the ZLOG_* enum, and having the daemon name available)

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/lib/libfrr.h b/lib/libfrr.h
new file mode 100644
index 0000000000..42c4e548cc
--- /dev/null
+++ b/lib/libfrr.h
@@ -0,0 +1,80 @@
+/*
+ * libfrr overall management functions
+ *
+ * Copyright (C) 2016  David Lamparter for NetDEF, Inc.
+ *
+ * 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; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _ZEBRA_FRR_H
+#define _ZEBRA_FRR_H
+
+#include "sigevent.h"
+#include "privs.h"
+#include "thread.h"
+#include "log.h"
+#include "getopt.h"
+
+#define FRR_NO_PRIVSEP		(1 << 0)
+#define FRR_NO_TCPVTY		(1 << 1)
+
+struct frr_daemon_info {
+	unsigned flags;
+
+	const char *progname;
+	zlog_proto_t log_id;
+	unsigned short instance;
+
+	char *vty_addr;
+	int vty_port;
+	char *vty_sock_path;
+
+	const char *proghelp;
+	void (*printhelp)(FILE *target);
+	const char *copyright;
+
+	struct quagga_signal_t *signals;
+	size_t n_signals;
+
+	struct zebra_privs_t *privs;
+};
+
+/* execname is the daemon's executable (and pidfile and configfile) name,
+ * i.e. "zebra" or "bgpd"
+ * constname is the daemons source-level name, primarily for the logging ID,
+ * i.e. "ZEBRA" or "BGP"
+ *
+ * note that this macro is also a latch-on point for other changes (e.g.
+ * upcoming plugin support) that need to place some per-daemon things.  Each
+ * daemon should have one of these.
+ */
+#define FRR_DAEMON_INFO(execname, constname, ...) \
+	static struct frr_daemon_info execname ##_di = { \
+		.log_id = ZLOG_ ## constname, \
+		__VA_ARGS__ \
+	};
+
+extern void frr_preinit(struct frr_daemon_info *daemon,
+		int argc, char **argv);
+extern void frr_opt_add(const char *optstr,
+		const struct option *longopts, const char *helpstr);
+extern int frr_getopt(int argc, char * const argv[], int *longindex);
+extern void frr_help_exit(int status);
+
+extern struct thread_master *frr_init(void);
+
+extern void frr_vty_serv(const char *path);
+
+#endif /* _ZEBRA_FRR_H */