118579Sfenner/* $FreeBSD$ */ 2100787Sfenner/* $NetBSD: as.c,v 1.1 2001/11/04 23:14:36 atatat Exp $ */ 318579Sfenner 418579Sfenner/* 518579Sfenner * Copyright (c) 2001 The NetBSD Foundation, Inc. 618579Sfenner * All rights reserved. 718579Sfenner * 818579Sfenner * This code is derived from software contributed to The NetBSD Foundation 918579Sfenner * by Andrew Brown. 1018579Sfenner * 1118579Sfenner * Redistribution and use in source and binary forms, with or without 1218579Sfenner * modification, are permitted provided that the following conditions 1318579Sfenner * are met: 1418579Sfenner * 1. Redistributions of source code must retain the above copyright 1518579Sfenner * notice, this list of conditions and the following disclaimer. 1618579Sfenner * 2. Redistributions in binary form must reproduce the above copyright 1718579Sfenner * notice, this list of conditions and the following disclaimer in the 1818579Sfenner * documentation and/or other materials provided with the distribution. 1918579Sfenner * 2018579Sfenner * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 2118579Sfenner * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2218579Sfenner * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2318579Sfenner * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24100787Sfenner * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2518579Sfenner * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2658835Sshin * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2718579Sfenner * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28100787Sfenner * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2918579Sfenner * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 3058835Sshin * POSSIBILITY OF SUCH DAMAGE. 3158835Sshin */ 3258835Sshin 3318579Sfenner#include <sys/cdefs.h> 3418579Sfenner#include <sys/types.h> 3518579Sfenner#include <sys/socket.h> 3618579Sfenner#include <netinet/in.h> 3718579Sfenner#include <arpa/inet.h> 3818579Sfenner#include <netdb.h> 3918579Sfenner#include <unistd.h> 4018579Sfenner#include <string.h> 4118579Sfenner#include <stdlib.h> 4218579Sfenner#include <errno.h> 4377816Sru#include <err.h> 4477816Sru#include <stdio.h> 4577816Sru 4618579Sfenner#include "as.h" 4718579Sfenner 4818579Sfenner#define DEFAULT_AS_SERVER "whois.radb.net" 4918579Sfenner#undef AS_DEBUG_FILE 5018579Sfenner 5118579Sfennerstruct aslookup { 5218579Sfenner FILE *as_f; 5318579Sfenner#ifdef AS_DEBUG_FILE 5418579Sfenner FILE *as_debug; 5518579Sfenner#endif /* AS_DEBUG_FILE */ 5618579Sfenner}; 5718579Sfenner 5818579Sfennervoid * 5918579Sfenneras_setup(const char *server) 6077816Sru{ 6118579Sfenner struct aslookup *asn; 6218579Sfenner struct addrinfo hints, *res0, *res; 6318579Sfenner FILE *f; 6418579Sfenner int s, error; 6518579Sfenner 6618579Sfenner s = -1; 6718579Sfenner if (server == NULL) 6818579Sfenner server = getenv("RA_SERVER"); 6918579Sfenner if (server == NULL) 7018579Sfenner server = DEFAULT_AS_SERVER; 7118579Sfenner 7218579Sfenner memset(&hints, 0, sizeof(hints)); 7318579Sfenner hints.ai_family = PF_UNSPEC; 7418579Sfenner hints.ai_socktype = SOCK_STREAM; 7518579Sfenner error = getaddrinfo(server, "whois", &hints, &res0); 7618579Sfenner if (error == EAI_SERVICE) { 7718579Sfenner warnx("warning: whois/tcp service not found"); 7818579Sfenner error = getaddrinfo(server, "43", &hints, &res0); 7918579Sfenner } 8077816Sru if (error != 0) { 8118579Sfenner warnx("%s: %s", server, gai_strerror(error)); 8218579Sfenner return (NULL); 8318579Sfenner } 8418579Sfenner 8518579Sfenner for (res = res0; res; res = res->ai_next) { 8618579Sfenner s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 8718579Sfenner if (s < 0) 8818579Sfenner continue; 8918579Sfenner if (connect(s, res->ai_addr, res->ai_addrlen) >= 0) 9018579Sfenner break; 9118579Sfenner close(s); 9218579Sfenner s = -1; 9318579Sfenner } 9418579Sfenner freeaddrinfo(res0); 9518579Sfenner if (s < 0) { 9618579Sfenner warn("connect"); 9718579Sfenner return (NULL); 9818579Sfenner } 9918579Sfenner 10018579Sfenner f = fdopen(s, "r+"); 10118579Sfenner (void)fprintf(f, "!!\n"); 10218579Sfenner (void)fflush(f); 10318579Sfenner 10418579Sfenner asn = malloc(sizeof(struct aslookup)); 10518579Sfenner if (asn == NULL) 10618579Sfenner (void)fclose(f); 10718579Sfenner else 10818579Sfenner asn->as_f = f; 10918579Sfenner 11018579Sfenner#ifdef AS_DEBUG_FILE 11118579Sfenner asn->as_debug = fopen(AS_DEBUG_FILE, "w"); 11218579Sfenner if (asn->as_debug) { 11318579Sfenner (void)fprintf(asn->as_debug, ">> !!\n"); 11418579Sfenner (void)fflush(asn->as_debug); 11518579Sfenner } 11618579Sfenner#endif /* AS_DEBUG_FILE */ 11718579Sfenner 11818579Sfenner return (asn); 11918579Sfenner} 12018579Sfenner 12118579Sfennerunsigned int 12218579Sfenneras_lookup(void *_asn, char *addr, sa_family_t family) 12318579Sfenner{ 12418579Sfenner struct aslookup *asn = _asn; 12518579Sfenner char buf[1024]; 12618579Sfenner unsigned int as; 12718579Sfenner int rc, dlen, plen; 12818579Sfenner 12918579Sfenner as = 0; 13018579Sfenner rc = dlen = 0; 13118579Sfenner plen = (family == AF_INET6) ? 128 : 32; 13218579Sfenner (void)fprintf(asn->as_f, "!r%s/%d,l\n", addr, plen); 13318579Sfenner (void)fflush(asn->as_f); 13418579Sfenner 13518579Sfenner#ifdef AS_DEBUG_FILE 13618579Sfenner if (asn->as_debug) { 13718579Sfenner (void)fprintf(asn->as_debug, ">> !r%s/%d,l\n", addr, plen); 13818579Sfenner (void)fflush(asn->as_debug); 13918579Sfenner } 14018579Sfenner#endif /* AS_DEBUG_FILE */ 14118579Sfenner 14218579Sfenner while (fgets(buf, sizeof(buf), asn->as_f) != NULL) { 14318579Sfenner buf[sizeof(buf) - 1] = '\0'; 14418579Sfenner 14518579Sfenner#ifdef AS_DEBUG_FILE 14618579Sfenner if (asn->as_debug) { 14718579Sfenner (void)fprintf(asn->as_debug, "<< %s", buf); 14818579Sfenner (void)fflush(asn->as_debug); 14918579Sfenner } 15018579Sfenner#endif /* AS_DEBUG_FILE */ 15118579Sfenner 15218579Sfenner if (rc == 0) { 15318579Sfenner rc = buf[0]; 15418579Sfenner switch (rc) { 15518579Sfenner case 'A': 15618579Sfenner /* A - followed by # bytes of answer */ 15718579Sfenner sscanf(buf, "A%d\n", &dlen); 15818579Sfenner#ifdef AS_DEBUG_FILE 15918579Sfenner if (asn->as_debug) { 16018579Sfenner (void)fprintf(asn->as_debug, 16118579Sfenner "dlen: %d\n", dlen); 16218579Sfenner (void)fflush(asn->as_debug); 16318579Sfenner } 16418579Sfenner#endif /* AS_DEBUG_FILE */ 16518579Sfenner break; 16618579Sfenner case 'C': 16718579Sfenner case 'D': 16818579Sfenner case 'E': 16918579Sfenner case 'F': 17018579Sfenner /* C - no data returned */ 17118579Sfenner /* D - key not found */ 17218579Sfenner /* E - multiple copies of key */ 17318579Sfenner /* F - some other error */ 17418579Sfenner break; 17518579Sfenner } 17618579Sfenner if (rc == 'A') 17718579Sfenner /* skip to next input line */ 17818579Sfenner continue; 17918579Sfenner } 18018579Sfenner 18118579Sfenner if (dlen == 0) 18218579Sfenner /* out of data, next char read is end code */ 18318579Sfenner rc = buf[0]; 18418579Sfenner if (rc != 'A') 18518579Sfenner /* either an error off the bat, or a done code */ 18618579Sfenner break; 18718579Sfenner 18818579Sfenner /* data received, thank you */ 18918579Sfenner dlen -= strlen(buf); 19018579Sfenner 19118579Sfenner /* origin line is the interesting bit */ 19218579Sfenner if (as == 0 && strncasecmp(buf, "origin:", 7) == 0) { 19318579Sfenner sscanf(buf + 7, " AS%u", &as); 19418579Sfenner#ifdef AS_DEBUG_FILE 19518579Sfenner if (asn->as_debug) { 19618579Sfenner (void)fprintf(asn->as_debug, "as: %d\n", as); 19718579Sfenner (void)fflush(asn->as_debug); 19818579Sfenner } 19918579Sfenner#endif /* AS_DEBUG_FILE */ 20018579Sfenner } 20118579Sfenner } 20218579Sfenner 20318579Sfenner return (as); 20418579Sfenner} 20518579Sfenner 20618579Sfennervoid 20718579Sfenneras_shutdown(void *_asn) 20818579Sfenner{ 20918579Sfenner struct aslookup *asn = _asn; 21018579Sfenner 21118579Sfenner (void)fprintf(asn->as_f, "!q\n"); 21277816Sru (void)fclose(asn->as_f); 21377816Sru 21477816Sru#ifdef AS_DEBUG_FILE 21518579Sfenner if (asn->as_debug) { 21618579Sfenner (void)fprintf(asn->as_debug, ">> !q\n"); 21718579Sfenner (void)fclose(asn->as_debug); 21818579Sfenner } 21918579Sfenner#endif /* AS_DEBUG_FILE */ 22018579Sfenner 22118579Sfenner free(asn); 22218579Sfenner} 22346542Sarchie