1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/* $FreeBSD$ */
/* $NetBSD: as.c,v 1.1 2001/11/04 23:14:36 atatat Exp $ */
/*
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Brown.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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/cdefs.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <err.h>
#include <stdio.h>
#include "as.h"
#define DEFAULT_AS_SERVER "whois.radb.net"
#undef AS_DEBUG_FILE
struct aslookup {
FILE *as_f;
#ifdef AS_DEBUG_FILE
FILE *as_debug;
#endif /* AS_DEBUG_FILE */
};
void *
as_setup(const char *server)
{
struct aslookup *asn;
struct addrinfo hints, *res0, *res;
FILE *f;
int s, error;
s = -1;
if (server == NULL)
server = getenv("RA_SERVER");
if (server == NULL)
server = DEFAULT_AS_SERVER;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(server, "whois", &hints, &res0);
if (error == EAI_SERVICE) {
warnx("warning: whois/tcp service not found");
error = getaddrinfo(server, "43", &hints, &res0);
}
if (error != 0) {
warnx("%s: %s", server, gai_strerror(error));
return (NULL);
}
for (res = res0; res; res = res->ai_next) {
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0)
continue;
if (connect(s, res->ai_addr, res->ai_addrlen) >= 0)
break;
close(s);
s = -1;
}
freeaddrinfo(res0);
if (s < 0) {
warn("connect");
return (NULL);
}
f = fdopen(s, "r+");
(void)fprintf(f, "!!\n");
(void)fflush(f);
asn = malloc(sizeof(struct aslookup));
if (asn == NULL)
(void)fclose(f);
else
asn->as_f = f;
#ifdef AS_DEBUG_FILE
asn->as_debug = fopen(AS_DEBUG_FILE, "w");
if (asn->as_debug) {
(void)fprintf(asn->as_debug, ">> !!\n");
(void)fflush(asn->as_debug);
}
#endif /* AS_DEBUG_FILE */
return (asn);
}
unsigned int
as_lookup(void *_asn, char *addr, sa_family_t family)
{
struct aslookup *asn = _asn;
char buf[1024];
unsigned int as;
int rc, dlen, plen;
as = 0;
rc = dlen = 0;
plen = (family == AF_INET6) ? 128 : 32;
(void)fprintf(asn->as_f, "!r%s/%d,l\n", addr, plen);
(void)fflush(asn->as_f);
#ifdef AS_DEBUG_FILE
if (asn->as_debug) {
(void)fprintf(asn->as_debug, ">> !r%s/%d,l\n", addr, plen);
(void)fflush(asn->as_debug);
}
#endif /* AS_DEBUG_FILE */
while (fgets(buf, sizeof(buf), asn->as_f) != NULL) {
buf[sizeof(buf) - 1] = '\0';
#ifdef AS_DEBUG_FILE
if (asn->as_debug) {
(void)fprintf(asn->as_debug, "<< %s", buf);
(void)fflush(asn->as_debug);
}
#endif /* AS_DEBUG_FILE */
if (rc == 0) {
rc = buf[0];
switch (rc) {
case 'A':
/* A - followed by # bytes of answer */
sscanf(buf, "A%d\n", &dlen);
#ifdef AS_DEBUG_FILE
if (asn->as_debug) {
(void)fprintf(asn->as_debug,
"dlen: %d\n", dlen);
(void)fflush(asn->as_debug);
}
#endif /* AS_DEBUG_FILE */
break;
case 'C':
case 'D':
case 'E':
case 'F':
/* C - no data returned */
/* D - key not found */
/* E - multiple copies of key */
/* F - some other error */
break;
}
if (rc == 'A')
/* skip to next input line */
continue;
}
if (dlen == 0)
/* out of data, next char read is end code */
rc = buf[0];
if (rc != 'A')
/* either an error off the bat, or a done code */
break;
/* data received, thank you */
dlen -= strlen(buf);
/* origin line is the interesting bit */
if (as == 0 && strncasecmp(buf, "origin:", 7) == 0) {
sscanf(buf + 7, " AS%u", &as);
#ifdef AS_DEBUG_FILE
if (asn->as_debug) {
(void)fprintf(asn->as_debug, "as: %d\n", as);
(void)fflush(asn->as_debug);
}
#endif /* AS_DEBUG_FILE */
}
}
return (as);
}
void
as_shutdown(void *_asn)
{
struct aslookup *asn = _asn;
(void)fprintf(asn->as_f, "!q\n");
(void)fclose(asn->as_f);
#ifdef AS_DEBUG_FILE
if (asn->as_debug) {
(void)fprintf(asn->as_debug, ">> !q\n");
(void)fclose(asn->as_debug);
}
#endif /* AS_DEBUG_FILE */
free(asn);
}
|
