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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1983 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | char copyright[] = | |
36 | "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ | |
37 | All rights reserved.\n"; | |
38 | #endif /* not lint */ | |
39 | ||
40 | #ifndef lint | |
41 | static char sccsid[] = "@(#)gettable.c 5.6 (Berkeley) 3/2/91"; | |
42 | #endif /* not lint */ | |
43 | ||
44 | #include <sys/types.h> | |
45 | #include <sys/socket.h> | |
46 | ||
47 | #include <netinet/in.h> | |
48 | ||
49 | #include <stdio.h> | |
50 | #include <netdb.h> | |
51 | ||
52 | #define OUTFILE "hosts.txt" /* default output file */ | |
53 | #define VERFILE "hosts.ver" /* default version file */ | |
54 | #define QUERY "ALL\r\n" /* query to hostname server */ | |
55 | #define VERSION "VERSION\r\n" /* get version number */ | |
56 | ||
57 | #define equaln(s1, s2, n) (!strncmp(s1, s2, n)) | |
58 | ||
89caf9d9 | 59 | struct sockaddr_in s_in; |
15637ed4 RG |
60 | char buf[BUFSIZ]; |
61 | char *outfile = OUTFILE; | |
62 | ||
63 | main(argc, argv) | |
64 | int argc; | |
65 | char *argv[]; | |
66 | { | |
67 | int s; | |
68 | register len; | |
69 | register FILE *sfi, *sfo, *hf; | |
70 | char *host; | |
71 | register struct hostent *hp; | |
72 | struct servent *sp; | |
73 | int version = 0; | |
74 | int beginseen = 0; | |
75 | int endseen = 0; | |
76 | ||
77 | argv++, argc--; | |
78 | if (**argv == '-') { | |
79 | if (argv[0][1] != 'v') | |
80 | fprintf(stderr, "unknown option %s ignored\n", *argv); | |
81 | else | |
82 | version++, outfile = VERFILE; | |
83 | argv++, argc--; | |
84 | } | |
85 | if (argc < 1 || argc > 2) { | |
86 | fprintf(stderr, "usage: gettable [-v] host [ file ]\n"); | |
87 | exit(1); | |
88 | } | |
89 | sp = getservbyname("hostnames", "tcp"); | |
90 | if (sp == NULL) { | |
91 | fprintf(stderr, "gettable: hostnames/tcp: unknown service\n"); | |
92 | exit(3); | |
93 | } | |
94 | host = *argv; | |
95 | argv++, argc--; | |
96 | hp = gethostbyname(host); | |
97 | if (hp == NULL) { | |
98 | fprintf(stderr, "gettable: %s: ", host); | |
99 | herror((char *)NULL); | |
100 | exit(2); | |
101 | } | |
102 | host = hp->h_name; | |
103 | if (argc > 0) | |
104 | outfile = *argv; | |
89caf9d9 | 105 | s_in.sin_family = hp->h_addrtype; |
15637ed4 RG |
106 | s = socket(hp->h_addrtype, SOCK_STREAM, 0); |
107 | if (s < 0) { | |
108 | perror("gettable: socket"); | |
109 | exit(4); | |
110 | } | |
89caf9d9 | 111 | if (bind(s, (struct sockaddr *)&s_in, sizeof (s_in)) < 0) { |
15637ed4 RG |
112 | perror("gettable: bind"); |
113 | exit(5); | |
114 | } | |
89caf9d9 PR |
115 | bcopy(hp->h_addr, &s_in.sin_addr, hp->h_length); |
116 | s_in.sin_port = sp->s_port; | |
117 | if (connect(s, (struct sockaddr *)&s_in, sizeof (s_in)) < 0) { | |
15637ed4 RG |
118 | perror("gettable: connect"); |
119 | exit(6); | |
120 | } | |
121 | fprintf(stderr, "Connection to %s opened.\n", host); | |
122 | sfi = fdopen(s, "r"); | |
123 | sfo = fdopen(s, "w"); | |
124 | if (sfi == NULL || sfo == NULL) { | |
125 | perror("gettable: fdopen"); | |
126 | close(s); | |
127 | exit(1); | |
128 | } | |
129 | hf = fopen(outfile, "w"); | |
130 | if (hf == NULL) { | |
131 | fprintf(stderr, "gettable: "); perror(outfile); | |
132 | close(s); | |
133 | exit(1); | |
134 | } | |
135 | fprintf(sfo, version ? VERSION : QUERY); | |
136 | fflush(sfo); | |
137 | while (fgets(buf, sizeof(buf), sfi) != NULL) { | |
138 | len = strlen(buf); | |
139 | buf[len-2] = '\0'; | |
140 | if (!version && equaln(buf, "BEGIN", 5)) { | |
141 | if (beginseen || endseen) { | |
142 | fprintf(stderr, | |
143 | "gettable: BEGIN sequence error\n"); | |
144 | exit(90); | |
145 | } | |
146 | beginseen++; | |
147 | continue; | |
148 | } | |
149 | if (!version && equaln(buf, "END", 3)) { | |
150 | if (!beginseen || endseen) { | |
151 | fprintf(stderr, | |
152 | "gettable: END sequence error\n"); | |
153 | exit(91); | |
154 | } | |
155 | endseen++; | |
156 | continue; | |
157 | } | |
158 | if (equaln(buf, "ERR", 3)) { | |
159 | fprintf(stderr, | |
160 | "gettable: hostname service error: %s", buf); | |
161 | exit(92); | |
162 | } | |
163 | fprintf(hf, "%s\n", buf); | |
164 | } | |
165 | fclose(hf); | |
166 | if (!version) { | |
167 | if (!beginseen) { | |
168 | fprintf(stderr, "gettable: no BEGIN seen\n"); | |
169 | exit(93); | |
170 | } | |
171 | if (!endseen) { | |
172 | fprintf(stderr, "gettable: no END seen\n"); | |
173 | exit(94); | |
174 | } | |
175 | fprintf(stderr, "Host table received.\n"); | |
176 | } else | |
177 | fprintf(stderr, "Version number received.\n"); | |
178 | close(s); | |
179 | fprintf(stderr, "Connection to %s closed\n", host); | |
180 | exit(0); | |
181 | } |