222 lines
5.3 KiB
C
222 lines
5.3 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: as.c,v 1.1 2001/11/04 23:14:36 atatat Exp $ */
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/*
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Brown.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <err.h>
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#include <stdio.h>
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#include "as.h"
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#define DEFAULT_AS_SERVER "whois.radb.net"
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#undef AS_DEBUG_FILE
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struct aslookup {
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FILE *as_f;
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#ifdef AS_DEBUG_FILE
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FILE *as_debug;
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#endif /* AS_DEBUG_FILE */
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};
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void *
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as_setup(char *server)
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{
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struct aslookup *asn;
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struct addrinfo hints, *res0, *res;
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FILE *f;
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int s, error;
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if (server == NULL)
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server = getenv("RA_SERVER");
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if (server == NULL)
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server = DEFAULT_AS_SERVER;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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error = getaddrinfo(server, "whois", &hints, &res0);
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if (error == EAI_SERVICE) {
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warnx("warning: whois/tcp service not found");
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error = getaddrinfo(server, "43", &hints, &res0);
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}
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if (error != 0) {
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warnx("%s: %s", server, gai_strerror(error));
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return (NULL);
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}
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for (res = res0; res; res = res->ai_next) {
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s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (s < 0)
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continue;
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if (connect(s, res->ai_addr, res->ai_addrlen) >= 0)
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break;
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close(s);
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s = -1;
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}
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freeaddrinfo(res0);
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if (s < 0) {
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warn("connect");
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return (NULL);
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}
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f = fdopen(s, "r+");
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(void)fprintf(f, "!!\n");
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(void)fflush(f);
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asn = malloc(sizeof(struct aslookup));
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if (asn == NULL)
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(void)fclose(f);
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else
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asn->as_f = f;
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#ifdef AS_DEBUG_FILE
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asn->as_debug = fopen(AS_DEBUG_FILE, "w");
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, ">> !!\n");
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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return (asn);
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}
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unsigned int
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as_lookup(void *_asn, char *addr, sa_family_t family)
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{
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struct aslookup *asn = _asn;
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char buf[1024];
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unsigned int as;
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int rc, dlen, plen;
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as = 0;
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rc = dlen = 0;
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plen = (family == AF_INET6) ? 128 : 32;
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(void)fprintf(asn->as_f, "!r%s/%d,l\n", addr, plen);
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(void)fflush(asn->as_f);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, ">> !r%s/%d,l\n", addr, plen);
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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while (fgets(buf, sizeof(buf), asn->as_f) != NULL) {
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buf[sizeof(buf) - 1] = '\0';
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, "<< %s", buf);
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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if (rc == 0) {
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rc = buf[0];
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switch (rc) {
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case 'A':
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/* A - followed by # bytes of answer */
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sscanf(buf, "A%d\n", &dlen);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug,
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"dlen: %d\n", dlen);
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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break;
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case 'C':
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case 'D':
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case 'E':
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case 'F':
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/* C - no data returned */
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/* D - key not found */
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/* E - multiple copies of key */
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/* F - some other error */
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break;
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}
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if (rc == 'A')
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/* skip to next input line */
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continue;
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}
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if (dlen == 0)
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/* out of data, next char read is end code */
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rc = buf[0];
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if (rc != 'A')
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/* either an error off the bat, or a done code */
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break;
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/* data received, thank you */
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dlen -= strlen(buf);
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/* origin line is the interesting bit */
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if (as == 0 && strncasecmp(buf, "origin:", 7) == 0) {
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sscanf(buf + 7, " AS%u", &as);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, "as: %d\n", as);
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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}
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}
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return (as);
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}
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void
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as_shutdown(void *_asn)
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{
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struct aslookup *asn = _asn;
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(void)fprintf(asn->as_f, "!q\n");
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(void)fclose(asn->as_f);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, ">> !q\n");
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(void)fclose(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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free(asn);
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}
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