add irrfilter mode.

generates bgpd filter rules from the Internet Routing Registry aka IRR aka
the aut-num, as-set and route objects in the RIPE, ARIN, APNIC ... databases
accessed via whois, using the Routing Policy Specificaion Language RPSL.
implement the whois query interface, an RPSL parser (of course only the
parts we need), recursive as-set resolver, prefixes per AS lookup,
and an ouput module to make up the rules.
work in progress, not ready for general consumption yet.
import agreed by theo & claudio

1 files changed, 149 insertions, 0 deletions

diff --git a/usr.sbin/bgpctl/whois.c b/usr.sbin/bgpctl/whois.c
new file mode 100644
index 00000000000..cecbf53e092
--- /dev/null
+++ b/usr.sbin/bgpctl/whois.c
@@ -0,0 +1,149 @@
+/*	$OpenBSD: whois.c,v 1.1 2007/03/03 11:45:30 henning Exp $ */
+
+/*
+ * Copyright (c) 2007 Henning Brauer <henning@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Copyright (c) 1980, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "irrfilter.h"
+
+#define WHOIS_STDOPTS	"-r -a"
+
+char *qtype_opts[] = {
+	"",
+	"-T aut-num",
+	"-K -T as-set",
+	"-K -T route -i origin"
+};
+
+char	*server = "whois.ripe.net";
+char	*port = "whois";
+
+int
+whois(const char *query, enum qtype qtype)
+{
+	FILE		*sfw, *sfr;
+	int		 s, r = -1, error = 0, attempt, ret;
+	struct addrinfo	 hints, *res, *ai;
+	const char	*reason = NULL;
+	char		*fmt;
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_flags = 0;
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	error = getaddrinfo(server, port, &hints, &res);
+	if (error) {
+		if (error == EAI_SERVICE)
+			warnx("%s: bad port", port);
+		else
+			warnx("%s: %s", server, gai_strerror(error));
+		return (1);
+	}
+
+	for (s = -1, ai = res; ai != NULL; ai = ai->ai_next) {
+		attempt = 0;
+		do {
+			attempt++;
+			if (s != -1)
+				close (s);
+			s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+			if (s == -1) {
+				error = errno;
+				reason = "socket";
+			} else
+				r = connect(s, ai->ai_addr, ai->ai_addrlen);
+		} while (r == -1 && errno == ETIMEDOUT && attempt <= 3);
+
+		if (r == -1) {
+			error = errno;
+			reason = "connect";
+			close(s);
+			s = -1;
+			continue;
+		}
+		if (s != -1)
+			break;	/*okay*/
+	}
+	freeaddrinfo(res);
+
+	if (s == -1) {
+		if (reason) {
+			errno = error;
+			warn("%s: %s", server, reason);
+		} else
+			warn("unknown error in connection attempt");
+		return (1);
+	}
+
+	sfr = fdopen(s, "r");
+	sfw = fdopen(s, "w");
+	if (sfr == NULL || sfw == NULL)
+		err(1, "fdopen");
+	fmt = "%s %s %s\r\n";
+	fprintf(sfw, fmt, WHOIS_STDOPTS, qtype_opts[qtype], query);
+	fflush(sfw);
+
+	if ((ret = parse_response(sfr, qtype)) == -1)
+		warnx("parse error, query=\"%s %s\"", qtype_opts[qtype], query);
+
+	fclose(sfw);
+	fclose(sfr);
+	close(s);
+	return (ret);
+}