annotate contrib/whoisd/as.c @ 1210:49ea22e393ba draft

descriptions
author cathugger <cathugger@cock.li>
date Thu, 19 Jul 2018 05:07:32 +0000
parents da853b90f62b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1146
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1 /* $NetBSD: as.c,v 1.2 2008/04/28 20:24:17 martin Exp $ */
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2
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3 /*
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4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
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5 * All rights reserved.
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6 *
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7 * This code is derived from software contributed to The NetBSD Foundation
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8 * by Andrew Brown.
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9 *
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10 * Redistribution and use in source and binary forms, with or without
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11 * modification, are permitted provided that the following conditions
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12 * are met:
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13 * 1. Redistributions of source code must retain the above copyright
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14 * notice, this list of conditions and the following disclaimer.
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15 * 2. Redistributions in binary form must reproduce the above copyright
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16 * notice, this list of conditions and the following disclaimer in the
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17 * documentation and/or other materials provided with the distribution.
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18 *
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19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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29 * POSSIBILITY OF SUCH DAMAGE.
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30 */
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31
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32 #include <sys/cdefs.h>
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33 #include <sys/types.h>
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34 #include <sys/socket.h>
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35 #include <netinet/in.h>
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36 #include <arpa/inet.h>
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37 #include <netdb.h>
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38 #include <unistd.h>
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39 #include <string.h>
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40 #include <stdlib.h>
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41 #include <errno.h>
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42 #include <err.h>
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43 #include <stdio.h>
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44
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45 #include "as.h"
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46
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47 #define DEFAULT_AS_SERVER "whois.radb.net"
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48 #undef AS_DEBUG_FILE
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49
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50 struct aslookup {
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51 FILE *as_f;
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52 #ifdef AS_DEBUG_FILE
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53 FILE *as_debug;
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54 #endif /* AS_DEBUG_FILE */
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55 };
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56
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57 void *
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58 as_setup(server)
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59 char *server;
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60 {
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61 struct aslookup *asn;
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62 struct hostent *he = NULL;
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63 struct servent *se;
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64 struct sockaddr_in in;
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65 FILE *f;
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66 int s;
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67
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68 if (server == NULL)
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69 server = DEFAULT_AS_SERVER;
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70
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71 (void)memset(&in, 0, sizeof(in));
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72 in.sin_family = AF_INET;
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73 in.sin_len = sizeof(in);
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74 if ((se = getservbyname("whois", "tcp")) == NULL) {
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75 warnx("warning: whois/tcp service not found");
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76 in.sin_port = ntohs(43);
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77 } else
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78 in.sin_port = se->s_port;
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79
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80 if (inet_aton(server, &in.sin_addr) == 0 &&
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81 ((he = gethostbyname(server)) == NULL ||
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82 he->h_addr == NULL)) {
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83 warnx("%s: %s", server, hstrerror(h_errno));
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84 return (NULL);
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85 }
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86
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87 if ((s = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
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88 warn("socket");
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89 return (NULL);
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90 }
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91
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92 do {
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93 if (he != NULL) {
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94 memcpy(&in.sin_addr, he->h_addr, he->h_length);
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95 he->h_addr_list++;
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96 }
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97 if (connect(s, (struct sockaddr *)&in, sizeof(in)) == 0)
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98 break;
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99 if (he == NULL || he->h_addr == NULL) {
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100 close(s);
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101 s = -1;
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102 break;
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103 }
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104 } while (1);
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105
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106 if (s == -1) {
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107 warn("connect");
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108 return (NULL);
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109 }
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110
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111 f = fdopen(s, "r+");
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112 (void)fprintf(f, "!!\n");
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113 (void)fflush(f);
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114
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115 asn = malloc(sizeof(struct aslookup));
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116 if (asn == NULL)
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117 (void)fclose(f);
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118 else
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119 asn->as_f = f;
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120
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121 #ifdef AS_DEBUG_FILE
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122 asn->as_debug = fopen(AS_DEBUG_FILE, "w");
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123 if (asn->as_debug) {
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124 (void)fprintf(asn->as_debug, ">> !!\n");
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125 (void)fflush(asn->as_debug);
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126 }
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127 #endif /* AS_DEBUG_FILE */
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128
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
129 return (asn);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
130 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
131
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
132 int
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
133 as_lookup(_asn, addr)
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
134 void *_asn;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
135 struct in_addr *addr;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
136 {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
137 struct aslookup *asn = _asn;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
138 char buf[1024];
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
139 int as, rc, dlen;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
140
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
141 as = rc = dlen = 0;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
142 (void)fprintf(asn->as_f, "!r%s/32,l\n", inet_ntoa(*addr));
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
143 (void)fflush(asn->as_f);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
144
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
145 #ifdef AS_DEBUG_FILE
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
146 if (asn->as_debug) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
147 (void)fprintf(asn->as_debug, ">> !r%s/32,l\n",
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
148 inet_ntoa(*addr));
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
149 (void)fflush(asn->as_debug);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
150 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
151 #endif /* AS_DEBUG_FILE */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
152
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
153 while (fgets(buf, sizeof(buf), asn->as_f) != NULL) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
154 buf[sizeof(buf) - 1] = '\0';
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
155
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
156 #ifdef AS_DEBUG_FILE
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
157 if (asn->as_debug) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
158 (void)fprintf(asn->as_debug, "<< %s", buf);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
159 (void)fflush(asn->as_debug);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
160 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
161 #endif /* AS_DEBUG_FILE */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
162
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
163 if (rc == 0) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
164 rc = buf[0];
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
165 switch (rc) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
166 case 'A':
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
167 /* A - followed by # bytes of answer */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
168 sscanf(buf, "A%d\n", &dlen);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
169 #ifdef AS_DEBUG_FILE
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
170 if (asn->as_debug) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
171 (void)fprintf(asn->as_debug,
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
172 "dlen: %d\n", dlen);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
173 (void)fflush(asn->as_debug);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
174 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
175 #endif /* AS_DEBUG_FILE */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
176 break;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
177 case 'C':
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
178 case 'D':
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
179 case 'E':
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
180 case 'F':
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
181 /* C - no data returned */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
182 /* D - key not found */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
183 /* E - multiple copies of key */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
184 /* F - some other error */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
185 break;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
186 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
187 if (rc == 'A')
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
188 /* skip to next input line */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
189 continue;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
190 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
191
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
192 if (dlen == 0)
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
193 /* out of data, next char read is end code */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
194 rc = buf[0];
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
195 if (rc != 'A')
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
196 /* either an error off the bat, or a done code */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
197 break;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
198
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
199 /* data received, thank you */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
200 dlen -= strlen(buf);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
201
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
202 /* origin line is the interesting bit */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
203 if (as == 0 && strncasecmp(buf, "origin:", 7) == 0) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
204 sscanf(buf + 7, " AS%d", &as);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
205 #ifdef AS_DEBUG_FILE
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
206 if (asn->as_debug) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
207 (void)fprintf(asn->as_debug, "as: %d\n", as);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
208 (void)fflush(asn->as_debug);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
209 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
210 #endif /* AS_DEBUG_FILE */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
211 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
212 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
213
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
214 return (as);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
215 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
216
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
217 void
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
218 as_shutdown(_asn)
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
219 void *_asn;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
220 {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
221 struct aslookup *asn = _asn;
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
222
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
223 (void)fprintf(asn->as_f, "!q\n");
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
224 (void)fclose(asn->as_f);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
225
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
226 #ifdef AS_DEBUG_FILE
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
227 if (asn->as_debug) {
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
228 (void)fprintf(asn->as_debug, ">> !q\n");
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
229 (void)fclose(asn->as_debug);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
230 }
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
231 #endif /* AS_DEBUG_FILE */
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
232
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
233 free(asn);
da853b90f62b Added mkz to anonet and as many of the needed files as I could think of.
epoch <epoch@hacking.allowed.org>
parents:
diff changeset
234 }